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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.


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

Estimating Rain Rates from Tipping-Bucket Rain Gauge Measurements  

Science Conference Proceedings (OSTI)

This paper describes the cubic spline–based operational system for the generation of the Tropical Rainfall Measuring Mission (TRMM) 1-min rain-rate product 2A-56 from tipping-bucket (TB) gauge measurements. A simulated TB gauge from a Joss–...

Jianxin Wang; Brad L. Fisher; David B. Wolff

2008-01-01T23:59:59.000Z

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

Rain Gauge and Disdrometer Measurements during the Keys Area Microphysics Project (KAMP)  

Science Conference Proceedings (OSTI)

Four impact disdrometers and 27 tipping bucket rain gauges were operated at 11 different sites during August and September 2001, as part of the Keys Area Microphysics Project. The rain gauge and disdrometer network was designed to study the range ...

Ali Tokay; David B. Wolff; Katherine R. Wolff; Paul Bashor

2003-11-01T23:59:59.000Z

5

Relative Performance of Automatic Rain Gauges under Different Rainfall Conditions  

Science Conference Proceedings (OSTI)

Six different types of automatic rain gauges, including tipping bucket, weighing, capacitance, optical, disdrometer, and acoustical sensors, were deployed for 17 months (September 1993–January 1995) at the NOAA Atlantic Oceanographic and ...

Jeffrey A. Nystuen

1999-08-01T23:59:59.000Z

6

A Piezoelectrical Rain Gauge for Application on Buoys  

Science Conference Proceedings (OSTI)

Rain gauge systems are required to measure rainfall data on buoys at oceanic sites that are not suited for conventional rain sensors. A piezoelectrical rain gauge has been developed for use on buoys, to provide rain measurements just above the ...

Jörg Förster; Giselher Gust; Siegfried Stolte

2004-02-01T23:59:59.000Z

7

Temporal Sampling Requirements for Automatic Rain Gauges  

Science Conference Proceedings (OSTI)

Automatic rain gauges are needed to obtain rainfall statistics from remote locations and platforms. Many of these platforms cannot be serviced regularly, thus requiring unattended operations for many months. At such locations there is often a ...

Jeffrey A. Nystuen

1998-12-01T23:59:59.000Z

8

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

9

ATLAS Self-Siphoning Rain Gauge Error Estimates  

Science Conference Proceedings (OSTI)

This report describes sampling and error characteristics of self-siphoning rain gauges used on moored buoys designed and assembled at NOAA's Pacific Marine Environmental Laboratory (PMEL) for deployment in the tropical Pacific and Atlantic Oceans ...

Yolande L. Serra; Patrick A'Hearn; H. Paul Freitag; Michael J. McPhaden

2001-12-01T23:59:59.000Z

10

A Rain Gauge for the Measurement of Finescale Temporal Variations  

Science Conference Proceedings (OSTI)

A rain gauge is described that quantizes rainwater collected by a funnel into equal-sized drops. Using a funnel of 150-mm diameter, the quantization corresponds to 1/160 mm of rainfall, enabling the measurement of low rainfall rates and the ...

C. David Stow; Stuart G. Bradley; Keith E. Farrington; Kim N. Dirks; Warren R. Gray

1998-02-01T23:59:59.000Z

11

Intercomparison of Rain Gauge, Radar, and Satellite-Based Precipitation Estimates with Emphasis on Hydrologic Forecasting  

Science Conference Proceedings (OSTI)

This study compares mean areal precipitation (MAP) estimates derived from three sources: an operational rain gauge network (MAPG), a radar/gauge multisensor product (MAPX), and the Precipitation Estimation from Remotely Sensed Information using ...

Koray K. Yilmaz; Terri S. Hogue; Kuo-lin Hsu; Soroosh Sorooshian; Hoshin V. Gupta; Thorsten Wagener

2005-08-01T23:59:59.000Z

12

An Investigation of the Consistency of TAO–TRITON Buoy-Mounted Capacitance Rain Gauges  

Science Conference Proceedings (OSTI)

The common use of remotely located, buoy-mounted capacitance rain gauges in the tropical oceans for satellite rainfall verification studies provides motivation for an in situ gauge bias assessment. A comparison of the biases in rainfall catchment ...

Mark L. Morrissey; Howard J. Diamond; Michael J. McPhaden; H. Paul Freitag; J. Scott Greene

2012-06-01T23:59:59.000Z

13

Real-Time Correction of Spatially Nonuniform Bias in Radar Rainfall Data Using Rain Gauge Measurements  

Science Conference Proceedings (OSTI)

A procedure for real-time correction of spatially nonuniform bias in radar rainfall data using rain gauge measurements is described. Developed to complement the existing gauge-based bias correction procedures used in the National Weather Service (...

Dong-Jun Seo; J. P. Breidenbach

2002-04-01T23:59:59.000Z

14

Experimental 4D-Var Assimilation of SYNOP Rain Gauge Data at ECMWF  

Science Conference Proceedings (OSTI)

Four-dimensional variational data assimilation (4D-Var) experiments with 6-hourly rain gauge accumulations observed at synoptic stations (SYNOP) around the globe have been run over several months, both at high resolution in an ECMWF operations-...

Philippe Lopez

2013-05-01T23:59:59.000Z

15

Improving Estimates of Heavy and Extreme Precipitation Using Daily Records from European Rain Gauges  

Science Conference Proceedings (OSTI)

The long-term variability in heavy precipitation characteristics over Europe for the period 1950–2000 is analyzed using high-quality daily records of rain gauge measurements from the European Climate Assessment (ECA) dataset. To improve the ...

Olga Zolina; Clemens Simmer; Konstantin Belyaev; Alice Kapala; Sergey Gulev

2009-06-01T23:59:59.000Z

16

An Examination of Radar and Rain Gauge–Derived Mean Areal Precipitation over Georgia Watersheds  

Science Conference Proceedings (OSTI)

Compared to conventional rain gauge networks, the Weather Surveillance Radar-1988 Doppler provides precipitation estimates at enhanced spatial and temporal resolution that River Forecast Centers can use to improve streamflow forecasts. This study ...

Keith M. Stellman; Henry E. Fuelberg; Reggina Garza; Mary Mullusky

2001-02-01T23:59:59.000Z

17

Climatological Characterization of Three-Dimensional Storm Structure from Operational Radar and Rain Gauge Data  

Science Conference Proceedings (OSTI)

Three algorithms extract information on precipitation type, structure, and amount from operational radar and rain gauge data. Tests on one month of data from one site show that the algorithms perform accurately and provide products that ...

Matthias Steiner; Robert A. Houze Jr.; Sandra E. Yuter

1995-09-01T23:59:59.000Z

18

Data Transformation and Uncertainty in Geostatistical Combination of Radar and Rain Gauges  

Science Conference Proceedings (OSTI)

Geostatistics provides a popular framework for deriving high-resolution quantitative precipitation estimates (QPE) by combining radar and rain gauge data. However, the skewed and heteroscedastic nature of precipitation is in contradiction to ...

Rebekka Erdin; Christoph Frei; Hans R. Künsch

2012-08-01T23:59:59.000Z

19

The Optimization and Calibration of a Rain Intensity Gauge  

Science Conference Proceedings (OSTI)

The high temporal variability of rainfall requires that measurements be taken at a high frequency for that variability to be recorded well, but most conventional gauges do not have this capability. The gauge described has a resolution estimated ...

John Sansom; Warren R. Gray

2002-01-01T23:59:59.000Z

20

A Comparison of NEXRAD WSR-88D Radar Estimates of Rain Accumulation with Gauge Measurements for High- and Low-Reflectivity Horizontal Gradient Precipitation Events  

Science Conference Proceedings (OSTI)

Radar-estimated rainfall amounts from the NEXRAD Weather Surveillance Radar precipitation accumulation algorithm were compared with measurements from numerous rain gauges (1639 radar versus gauge comparisons). Storm total rain accumulations from ...

Gerard E. Klazura; Jessica M. Thomale; D. Scott Kelly; Paul Jendrowski

1999-11-01T23:59:59.000Z

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.


21

Analysis of 2002 and 2003 Warm-Season Precipitation from the North American Monsoon Experiment Event Rain Gauge Network  

Science Conference Proceedings (OSTI)

Analyses of rainfall characteristics and their linkage to physiographic features are made from the North American monsoon experiment (NAME) Event Rain Gauge Network (NERN) in northwest Mexico. The findings are based on the network configuration ...

David J. Gochis; Alejandro Jimenez; Christopher J. Watts; Jaime Garatuza-Payan; W. James Shuttleworth

2004-12-01T23:59:59.000Z

22

APHRODITE: Constructing a Long-Term Daily Gridded Precipitation Dataset for Asia Based on a Dense Network of Rain Gauges  

Science Conference Proceedings (OSTI)

A daily gridded precipitation dataset covering a period of more than 57 yr was created by collecting and analyzing rain gauge observation data across Asia through the activities of the Asian Precipitation—Highly Resolved Observational Data Integration ...

Akiyo Yatagai; Kenji Kamiguchi; Osamu Arakawa; Atsushi Hamada; Natsuko Yasutomi; Akio Kitoh

2012-09-01T23:59:59.000Z

23

Frequency of Heavy Rainstorms on Areas from 10 to 10 000 km2, Defined Using Dense Rain Gauge Networks  

Science Conference Proceedings (OSTI)

Operation in Illinois of eight dense rain gauge networks of varying sizes, with each operating for 5–22 yr, provided data used to assess the temporal frequency of very heavy rain events on small- to moderate-sized areas. Initial testing reveals ...

Stanley A. Changnon

2002-04-01T23:59:59.000Z

24

Global Precipitation Estimates Based on a Technique for Combining Satellite-Based Estimates, Rain Gauge Analysis, and NWP Model Precipitation Information  

Science Conference Proceedings (OSTI)

The “satellite-gauge-model” (SGM) technique is described for combining precipitation estimates from microwave satellite data, infrared satellite data, rain gauge analyses, and numerical weather prediction models into improved estimates of global ...

George J. Huffman; Robert F. Adler; Bruno Rudolf; Udo Schneider; Peter R. Keehn

1995-05-01T23:59:59.000Z

25

CAMS–OPI: A Global Satellite–Rain Gauge Merged Product for Real-Time Precipitation Monitoring Applications  

Science Conference Proceedings (OSTI)

A method has been developed to produce real-time rain gauge–satellite merged analyses of global monthly precipitation. A dataset of these analyses spans the period from January 1979 to the present, which is sufficiently long to allow the ...

John E. Janowiak; Pingping Xie

1999-11-01T23:59:59.000Z

26

Difficulties with Correcting Radar Rainfall Estimates Based on Rain Gauge Data: A Case Study of Severe Weather in Montana on 16–17 June 2007  

Science Conference Proceedings (OSTI)

The principal source of information for operational flash flood monitoring and warning issuance is weather radar–based quantitative estimates of precipitation. Rain gauges are considered truth for the purposes of validating and calibrating real-...

Steven V. Vasiloff; Kenneth W. Howard; Jian Zhang

2009-10-01T23:59:59.000Z

27

Effects of Rain Gauge Temporal Resolution on the Specification of a Z–R Relationship  

Science Conference Proceedings (OSTI)

The weather radar is an efficient alternative for measuring spatially varying rainfall covering a large area at a high temporal resolution. This paper studies the impact of rainfall gauge temporal resolution on optimal relationships between radar ...

Punpim Puttaraksa Mapiam; Nutchanart Sriwongsitanon; Siriluk Chumchean; Ashish Sharma

2009-07-01T23:59:59.000Z

28

Sensitivity of WSR-88D Rainfall Estimates to the Rain-Rate Threshold and Rain Gauge Adjustment: A Flash Flood Case Study  

Science Conference Proceedings (OSTI)

A strong thunderstorm produced a flash flood on the evening of 12 July 1996 in Buffalo Creek, Colorado, that caused two deaths and significant property damage. Most of the rain fell in a 1-h time period from 2000 to 2100 MDT. The performance of ...

Richard A. Fulton

1999-10-01T23:59:59.000Z

29

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

E-Print Network (OSTI)

-format, bucket, container, package. INTRODUCTION Digital libraries (DLs) are an important research topic in many together. A single bucket can have multiple packages. Packages can correspond to the semantics bucket, bucket terms and conditions, pointers to other buckets or packages, etc. A single package can

Nelson, Michael L.

30

Turbine bucket natural frequency tuning rib  

SciTech Connect

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

31

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 )

32

Rainfall Estimation in the Sahel. Part II: Evaluation of Rain Gauge Networks in the CILSS Countries and Objective Intercomparison of Rainfall Products  

Science Conference Proceedings (OSTI)

This study investigates the accuracy of various precipitation products for the Sahel. A first set of products is made of three ground-based precipitation estimates elaborated regionally from the gauge data collected by Centre Regional ...

Abdou Ali; Abou Amani; Arona Diedhiou; Thierry Lebel

2005-11-01T23:59:59.000Z

33

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

34

Algorithms for discovering bucket orders from data  

Science Conference Proceedings (OSTI)

Ordering and ranking items of different types are important tasks in various applications, such as query processing and scientific data mining. A total order for the items can be misleading, since there are groups of items that have practically equal ... Keywords: bucket order, ordering, partial order, ranking

Aristides Gionis; Heikki Mannila; Kai Puolamäki; Antti Ukkonen

2006-08-01T23:59:59.000Z

35

Liquid cooled counter flow turbine bucket  

DOE Patents (OSTI)

Means and a method are provided whereby liquid coolant flows radially outward through coolant passages in a liquid cooled turbine bucket under the influence of centrifugal force while in contact with countercurrently flowing coolant vapor such that liquid is entrained in the flow of vapor resulting in an increase in the wetted cooling area of the individual passages.

Dakin, James T. (Schenectady, NY)

1982-09-21T23:59:59.000Z

36

Performance evaluation of interpolation methods for incorporating rain gauge measurements into NEXRAD precipitation data: A case study in the Upper Guadalupe River Basin  

Science Conference Proceedings (OSTI)

High spatial and temporal resolution of precipitation data is critical input for hydrological budget estimation and flash flood modeling. This study evaluated four methods (Bias Adjustment (BA), Simple Kriging with varying Local Means (SKlm), Kriging with External Drift (KED), and Regression Kriging (RK)) for their performances in incorporating gauge rainfall measurements into NEXRAD (Next Generation Weather Radar) Multisensor Precipitation Estimator (MPE) (hourly and 4 x 4 km{sup 2}). Measurements from a network of 50 gauges at the Upper Guadalupe River Basin, Central Texas and MPE data for the year 2004 were used in the study. We used three evaluation coefficients Percentage Bias (PB), Coefficient of Determination (R2), and Nash-Sutcliffe efficiency (NSE) to examine the performance of the four methods for preserving regional and local scale characteristics of observed precipitation data. The results show that the two Kriging-based methods (SKlm and RK) are in generally better than BA and KED and that the PB and NSE criteria are better than the R2 criterion in assessing the performance of the four methods. It is also worth noting that the performance of one method at regional scale may be different from its performance at local scale. Critical evaluation of the performance of different methods at local or regional scale should be conducted according to the different purposes. The results obtained in this study are expected to contribute to the development of more accurate spatial rainfall products for hydrologic budget and flash flood modeling.

Xie, Hongjie; Zhang, Xuesong; Yu, Beibei; Sharif, Hatim

2011-04-21T23:59:59.000Z

37

BBAT: Bunch and bucket analysis tool  

Science Conference Proceedings (OSTI)

BBAT is written to meet the need of an interactive graphical tool to explore the longitudinal phase space. It is driven for testing new ideas or new tricks quickly. It is especially suitable for machine physicists or operation staff as well both in the control room during machine studies or off-line to analyze the data. The heart of the package contains a set of c-routines to do the number crunching. The graphics part is wired with scripting language tcl/tk and BLT. The c-routines are general enough that one can write new applications such as animation of the bucket as a machine parameter varies via a sliding scale. BBAT deals with single rf system. For double rf system, one can use Dr. BBAT, which stands for Double rf Bunch and Bucket Analysis Tool. One usage of Dr. BBAT is to visualize the process of bunch coalescing and flat bunch creation.

Deng, D.P.

1995-05-01T23:59:59.000Z

38

Gas turbine bucket with impingement cooled platform  

SciTech Connect

In a turbine bucket having an airfoil portion and a root portion, with a substantially planar platform at an interface between the airfoil portion and root portion, a platform cooling arrangement including at least one bore in the root portion and at least one impingement cooling tube seated in the bore, the tube extending beyond the bore with an outlet in close proximity to a targeted area on an underside of the platform.

Jones, Raphael Durand (Guilderland, NY)

2002-01-01T23:59:59.000Z

39

Intercomparison of Recording and Standard Nonrecording U.S. Gauges  

Science Conference Proceedings (OSTI)

Existing adjustment procedures for precipitation measured by the 8-in. standard nonrecording rain gauge (SNRG) take into account gauge undercatch mostly due to wind-induced turbulence over its orifice. The goal of this paper is to “reduce” the ...

Pavel Ya Groisman; Eugene L. Peck; Robert G. Quayle

1999-05-01T23:59:59.000Z

40

Bucket wheel reclaimer modeling as a robotic arm  

Science Conference Proceedings (OSTI)

Bucket Wheeel Reclaimer (BWR) has been widely used for stacking/reclaiming bulk materials (i.e. iron ore) onto/from stockpiles in mining industry. Generally speaking, current BWRs are manually operated, remotely operated, or automated to simply follow ... Keywords: bucket wheel reclaimer, control, and fuzzy logic, modeling and simulation

Tien-Fu Lu

2009-12-01T23:59:59.000Z

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.


41

Cooling circuit for a gas turbine bucket and tip shroud  

SciTech Connect

An open cooling circuit for a gas turbine bucket wherein the bucket has an airfoil portion, and a tip shroud, the cooling circuit including a plurality of radial cooling holes extending through the airfoil portion and communicating with an enlarged internal area within the tip shroud before exiting the tip shroud such that a cooling medium used to cool the airfoil portion is subsequently used to cool the tip shroud.

Willett, Fred Thomas (25 Long Creek Dr., Burnt Hills, NY 12027); Itzel, Gary Michael (12 Cider Mill Dr., Clifton Park, NY 12065); Stathopoulos, Dimitrios (11 Wyngate Rd., Glenmont, NY 12077); Plemmons, Larry Wayne (late of Hamilton, OH); Plemmons, Helen M. (2900 Long Ridge Trails, Hamilton, OH 45014); Lewis, Doyle C. (444 River Way, Greer, SC 29651)

2002-01-01T23:59:59.000Z

42

Debunching into a bucket of lower harmonic number  

SciTech Connect

The adiabatic debunching of beam from buckets of higher harmonic number into waiting buckets of lower harmonic number is a critical step in the current scheme of operation for Tev I. The optimum choice of rf system parameters for this ''bunch coalescing'' process is not immediately obvious. In this note two examples are presented along with generalizations based upon them and experience with the Tevatron I design which can simplify the selection of appropriate parameters for different conditions.

MacLachlan, J.A.; Griffin, J.E.

1987-12-09T23:59:59.000Z

43

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

44

ARM - Instrument Handbooks  

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

Bucket Rain Gauge DISDROMETER 2009 Doppler Lidar DL 2012 Eddy Correlation Flux Measurement System ECOR 2011 Energy Balance Bowen Ratio Station EBBR 2011 G-Band (183 GHz)...

45

Stage 3 bucket shank bypass holes and related method  

DOE Patents (OSTI)

In a multi-stage turbine wherein at least one turbine wheel supports a row of buckets for rotation, and wherein the turbine wheel is located axially between first and second annular fixed arrays of nozzles, a cooling air circuit for purging a wheelspace between the turbine wheel and the second fixed annular array of nozzles comprising a flowpath through a shank portion of one or more buckets connecting a wheelspace between the turbine wheel and the first fixed annular array of nozzles with the wheelspace between the turbine wheel and the second fixed annular array of nozzles.

Leone, Sal Albert (Scotia, NY); Eldrid, Sacheverel Quentin (Saratoga Springs, NY); Lupe, Douglas Arthur (Ballston Lake, NY)

2002-01-01T23:59:59.000Z

46

Uncertainties in Oceanic Radar Rain Maps at Kwajalein and Implications for Satellite Validation  

Science Conference Proceedings (OSTI)

The Kwajalein, Marshall Islands, Tropical Rainfall Measuring Mission (TRMM) ground validation radar has provided a multiyear three-dimensional radar dataset at an oceanic site. Extensive rain gauge networks are not feasible over the ocean and, ...

Robert A. Houze Jr; Stacy Brodzik; Courtney Schumacher; Sandra E. Yuter; Christopher R. Williams

2004-08-01T23:59:59.000Z

47

General Probability-matched Relations between Radar Reflectivity and Rain Rate  

Science Conference Proceedings (OSTI)

A method of deriving the relation between radar-observed reflectivities Ze and gauge-measured rain intensity, R is presented. It is based on matching the probabilities of the two variables. The observed reflectivity is often very different from ...

Daniel Rosenfeld; David B. Wolff; David Atlas

1993-01-01T23:59:59.000Z

48

Assessing Satellite-Based Rainfall Estimates in Semiarid Watersheds Using the USDA-ARS Walnut Gulch Gauge Network and TRMM PR  

Science Conference Proceedings (OSTI)

The rain gauge network associated with the Walnut Gulch Experimental Watershed (WGEW) in southeastern Arizona provides a unique opportunity for direct comparisons of in situ measurements and satellite-based instantaneous rain rate estimates like ...

Eyal Amitai; Carl L. Unkrich; David C. Goodrich; Emad Habib; Bryson Thill

2012-10-01T23:59:59.000Z

49

Heavy Rain Events over the South-Facing Slopes of Hawaii: Attendant Conditions  

Science Conference Proceedings (OSTI)

Heavy rain events (>100 mm day?1) over the southeast flank of Mauna Loa volcano on the island of Hawaii are examined using surface, rawinsonde, rain gauge, and satellite data. The events occur in the presence of four types of synoptic-scale ...

Kevin Kodama; Gary M. Barnes

1997-06-01T23:59:59.000Z

50

Gas turbine bucket cooling circuit and related process  

SciTech Connect

A turbine bucket includes an airfoil portion having leading and trailing edges; at least one radially extending cooling passage within the airfoil portion, the airfoil portion joined to a platform at a radially inner end of the airfoil portion; a dovetail mounting portion enclosing a cooling medium supply passage; and, a crossover passage in fluid communication with the cooling medium supply passage and with at least one radially extending cooling passage, the crossover passage having a portion extending along and substantially parallel to an underside surface of the platform.

Lewis, Doyle C. (Greer, SC); Barb, Kevin Joseph (Halfmoon, NY)

2002-01-01T23:59:59.000Z

51

Aging gauge  

DOE Patents (OSTI)

An aging gauge comprising a container having a fixed or a variable sized t opening with a cap which can be opened to control the sublimation rate of a thermally sublimational material contained within the container. In use, the aging gauge is stored with an item to determine total heat the item is subjected to and also the maximum temperature to which the item has been exposed. The aging gauge container contains a thermally sublimational material such as naphthalene or similar material which has a low sublimation rate over the temperature range from about 70.degree. F. to about 160.degree. F. The aging products determined by analyses of a like item aged along with the aging gauge for which the sublimation amount is determined is employed to establish a calibration curve for future aging evaluation. The aging gauge is provided with a means for determining the maximum temperature exposure (i.e., a thermally indicating material which gives an irreversible color change, Thermocolor pigment). Because of the relationship of doubling reaction rates for increases of 10.degree. C., equivalency of item used in accelerated aging evaluation can be obtained by referring to a calibration curve depicting storage temperature on the abscissa scale and multiplier on the ordinate scale.

Betts, Robert E. (Huntsville, AL); Crawford, John F. (Huntsville, AL)

1989-01-01T23:59:59.000Z

52

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 Conference Proceedings (OSTI)

The present research demonstrated that temporal downscaling of rain gauge precipitation with satellite-based precipitation enhances the accuracy of hydrological simulations, especially in the flood duration. Multiple regression analysis was ...

Masahiro RYO; Oliver C. Saavedra V.Shinjiro Kanae; Tinh Dang Ngoc

53

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.

54

(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

55

Effects of Retrospective Gauge-Based Readjustment of Multisensor Precipitation Estimates on Hydrologic Simulations  

Science Conference Proceedings (OSTI)

This paper presents methodologies for mitigating temporally inconsistent biases in National Weather Service (NWS) real-time multisensor quantitative precipitation estimates (MQPEs) through rain gauge–based readjustments, and examines their effects ...

Yu Zhang; Seann Reed; David Kitzmiller

2011-06-01T23:59:59.000Z

56

Intercomparison of Rainfall Estimates from Radar, Satellite, Gauge, and Combinations for a Season of Record Rainfall  

Science Conference Proceedings (OSTI)

Rainfall products from radar, satellite, rain gauges, and combinations have been evaluated for a season of record rainfall in a heavily instrumented study domain in Oklahoma. Algorithm performance is evaluated in terms of spatial scale, temporal ...

Jonathan J. Gourley; Yang Hong; Zachary L. Flamig; Li Li; Jiahu Wang

2010-03-01T23:59:59.000Z

57

Hydrologic Evaluation of Rainfall Estimates from Radar, Satellite, Gauge, and Combinations on Ft. Cobb Basin, Oklahoma  

Science Conference Proceedings (OSTI)

This study evaluates rainfall estimates from the Next Generation Weather Radar (NEXRAD), operational rain gauges, Tropical Rainfall Measuring Mission (TRMM) Multisatellite Precipitation Analysis (TMPA), and Precipitation Estimation from Remotely ...

Jonathan J. Gourley; Yang Hong; Zachary L. Flamig; Jiahu Wang; Humberto Vergara; Emmanouil N. Anagnostou

2011-10-01T23:59:59.000Z

58

Discrepancy between Gauges and Satellite Estimates of Rainfall in Equatorial Africa  

Science Conference Proceedings (OSTI)

The Global Precipitation Climatology Project (GPCP) satellite estimates have approximately twice the magnitude of estimates produced from the rain gauges used by the GPCP in central equatorial Africa. Different possible explanations are ...

Jeffrey R. McCollum; Arnold Gruber; Mamoudou B. Ba

2000-05-01T23:59:59.000Z

59

The Application of Radar?Gauge Comparisons to Operational Precipitation Profile Corrections  

Science Conference Proceedings (OSTI)

The analyses of data recorded during the past eight years with two Swiss radars, a network of rain gauges, and river flow measurements have helped to quantify the vertical profile of reflectivity and the influences of topography, meteorology, and ...

Jürg Joss; Robert Lee

1995-12-01T23:59:59.000Z

60

Pricing and admission control for shared computer services using the token bucket mechanism  

E-Print Network (OSTI)

This dissertation presents and analyzes token-bucket pricing schemes for shared resources. This research is motivated by the computer services industry, where services are provided mostly on a dedicated basis. However, ...

Baron, Opher, 1970-

2003-01-01T23:59:59.000Z

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.


61

Rain sampling device  

DOE Patents (OSTI)

The present invention constitutes a rain sampling device adapted for independent operation at locations remote from the user which allows rainfall to be sampled in accordance with any schedule desired by the user. The rain sampling device includes a mechanism for directing wet precipitation into a chamber, a chamber for temporarily holding the precipitation during the process of collection, a valve mechanism for controllably releasing samples of the precipitation from the chamber, a means for distributing the samples released from the holding chamber into vessels adapted for permanently retaining these samples, and an electrical mechanism for regulating the operation of the device. 11 figures.

Nelson, D.A.; Tomich, S.D.; Glover, D.W.; Allen, E.V.; Hales, J.M.; Dana, M.T.

1991-05-14T23:59:59.000Z

62

In Search of the Rain Forest  

E-Print Network (OSTI)

Review: In Search of the Rain Forest By Candace Slater (Candace Slater (Ed. ). In Search of the Rain Forest. Durham:

Hamilton-Smith, Elery

2005-01-01T23:59:59.000Z

63

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

64

Simulations of RF capture with barrier bucket in booster at injection  

Science Conference Proceedings (OSTI)

As part of the effort to increase the number of ions per bunch in RHIC, a new scheme for RF capture of EBIS ions in Booster at injection has been developed. The scheme was proposed by M. Blaskiewicz and J.M. Brennan. It employs a barrier bucket to hold a half turn of beam in place during capture into two adjacent harmonic 4 buckets. After acceleration, this allows for 8 transfers of 2 bunches from Booster into 16 buckets on the AGS injection porch. During the Fall of 2011 the necessary hardware was developed and implemented by the RF and Controls groups. The scheme is presently being commissioned by K.L. Zeno with Au32+ ions from EBIS. In this note we carry out simulations of the RF capture. These are meant to serve as benchmarks for what can be achieved in practice. They also allow for an estimate of the longitudinal emittance of the bunches on the AGS injection porch.

Gardner, C.J.

2012-01-23T23:59:59.000Z

65

Biases of Rain Retrieval Algorithms for Spaceborne Radar Caused by Nonuniformity of Rain  

Science Conference Proceedings (OSTI)

The biases of various rain retrieval algorithms for a spaceborne rain radar due to nonuniformity of rain are studied using simple models and an actual time sequence of rainfall rate. A conventional rain retrieval algorithm in which measured radar ...

Kenji Nakamura

1991-06-01T23:59:59.000Z

66

A Probability Distribution Model for Rain Rate  

Science Conference Proceedings (OSTI)

A systematic approach is suggested for modeling the probability distribution of rain rate. Rain rate, conditional on rain and averaged over a region, is modeled as a temporally homogeneous diffusion process with appropriate boundary conditions. ...

Benjamin Kedem; Harry Pavlopoulos; Xiaodong Guan; David A. Short

1994-12-01T23:59:59.000Z

67

Polarimetric Estimates of a 1-Month Accumulation of Light Rain with a 3-cm Wavelength Radar  

Science Conference Proceedings (OSTI)

The authors evaluate rainfall estimates from the new polarimetric X-band radar at Bonn, Germany, for a period between mid-November and the end of December 2009 by comparison with rain gauges. The emphasis is on slightly more than 1-month ...

L. Borowska; D. Zrni?; A. Ryzhkov; P. Zhang; C. Simmer

2011-10-01T23:59:59.000Z

68

ARM TR-008  

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

Disdrometer and Tipping Bucket Rain Gauge Handbook January 2006 M.J. Bartholomew Work supported by the U.S. Department of Energy, Office of Science, Office of Biological and...

69

Rainfall Amount, Intensity, Duration, and Frequency Relationships in the Mae Chaem Watershed in Southeast Asia  

Science Conference Proceedings (OSTI)

A dense tipping-bucket rain gauge network was established in the Mae Chaem watershed in the mountains of northwestern Thailand as part of the Global Energy and Water Cycle Experiment (GEWEX) Asian Monsoon Experiment-Tropics (GAME-T). ...

Koji Dairaku; Seita Emori; Taikan Oki

2004-06-01T23:59:59.000Z

70

Surface Measurements of Precipitation from an Ocean Mooring: The Underwater Acoustic Log from the South China Sea  

Science Conference Proceedings (OSTI)

Surface measurements of precipitation in oceanic environments have proven especially difficult to obtain because traditional technologies such as tipping-bucket rain gauges are unsuitable for deployment from oceanic platforms such as ships and ...

Jeffrey A. Nystuen; Michael J. McPhaden; H. Paul Freitag

2000-12-01T23:59:59.000Z

71

Preparation for turning a Bucket Wheel Reclaimer into a robotic arm  

Science Conference Proceedings (OSTI)

This paper presents the ground work prepared for turning a Bucket Wheel Reclaimer (BWR) into a robotic arm for operation automation. BWR has been widely used in dealing with bulk materials by removing them from the conveyor and stack them as well as ...

Tien-Fu Lu

2009-02-01T23:59:59.000Z

72

Strain gauge installation tool  

SciTech Connect

A tool and a method for attaching a strain gauge to a test specimen by maaining alignment of, and applying pressure to, the strain gauge during the bonding of the gauge to the specimen. The tool comprises rigid and compliant pads attached to a spring-loaded clamp. The pads are shaped to conform to the specimen surface to which the gauge is to be bonded. The shape of the pads permits the tool to align itself to the specimen and to maintain alignment of the gauge to the specimen during the bond curing process. A simplified method of attaching a strain gauge is provided by use of the tool.

Conard, Lisa Marie (Swissvale, PA)

1998-01-01T23:59:59.000Z

73

Strain gauge installation tool  

DOE Patents (OSTI)

A tool and a method for attaching a strain gauge to a test specimen by maintaining alignment of, and applying pressure to, the strain gauge during the bonding of the gauge to the specimen. The tool comprises rigid and compliant pads attached to a spring-loaded clamp. The pads are shaped to conform to the specimen surface to which the gauge is to be bonded. The shape of the pads permits the tool to align itself to the specimen and to maintain alignment of the gauge to the specimen during the bond curing process. A simplified method of attaching a strain gauge is provided by use of the tool.

Conard, Lisa Marie

1997-12-01T23:59:59.000Z

74

Warm Rain Study in Hawaii—Rain Initiation  

Science Conference Proceedings (OSTI)

More than 300 hours of aircraft flights were conducted in Hawaii from 1977 to 1979 to study precipitation mechanisms in warm rain. Airborne instruments were used to measure drop size distributions over the size range from cloud droplets to ...

Tsutomu Takahashi

1981-02-01T23:59:59.000Z

75

Controlling acid rain : policy issues  

E-Print Network (OSTI)

The policy and regulatory ramifications of U.S. acid rain control programs are examined; particularly, the alternative of a receptor-oriented strategy as constrasted to emission-oriented proposals (e.g., the Mitchell bill) ...

Fay, James A.

1983-01-01T23:59:59.000Z

76

Manifestly Gauge Invariant QCD  

E-Print Network (OSTI)

Building on recent work in SU(N) Yang-Mills theory, we construct a manifestly gauge invariant exact renormalization group for QCD. A gauge invariant cutoff is constructed by embedding the physical gauge theory in a spontaneously broken SU(N|N) gauge theory, regularized by covariant higher derivatives. Intriguingly, the construction is most efficient if the number of flavours is a multiple of the number of colours. The formalism is illustrated with a very compact calculation of the one-loop beta function, achieving a manifestly universal result and without fixing the gauge.

Tim R. Morris; Oliver J. Rosten

2006-06-20T23:59:59.000Z

77

Rainfall Estimation with an Operational Polarimetric C-Band Radar in the United Kingdom: Comparison with a Gauge Network and Error Analysis  

Science Conference Proceedings (OSTI)

The estimate of rainfall using data from an operational dual-polarized C-band radar in convective storms in southeast United Kingdom is compared against a network of gauges. Four different rainfall estimators are considered: reflectivity–rain-rate ...

V. N. Bringi; M. A. Rico-Ramirez; M. Thurai

2011-10-01T23:59:59.000Z

78

Cooling circuit for and method of cooling a gas turbine bucket  

SciTech Connect

A closed internal cooling circuit for a gas turbine bucket includes axial supply and return passages in the dovetail of the bucket. A first radial outward supply passage provides cooling medium to and along a passageway adjacent the leading edge and then through serpentine arranged passageways within the airfoil to a chamber adjacent the airfoil tip. A second radial passage crosses over the radial return passage for supplying cooling medium to and along a pair of passageways along the trailing edge of the airfoil section. The last passageway of the serpentine passageways and the pair of passageways communicate one with the other in the chamber for returning spent cooling medium radially inwardly along divided return passageways to the return passage. In this manner, both the leading and trailing edges are cooled using the highest pressure, lowest temperature cooling medium.

Jacala, Ariel C. P. (Simpsonville, SC)

2002-01-01T23:59:59.000Z

79

Life Management System for Advanced E Class Gas Turbines: General Electric 7EA 1st Stage Bucket Analysis  

Science Conference Proceedings (OSTI)

This report is a continuation in an ongoing series of life management studies for turbine hot section components. It represents the efforts associated with benchmarking the 1st row bucket of the General Electric 7EA class of machines. It describes the application of the Hot Section Life Management Platform (HSLMP) and the temperatures, stress and life consumption that occur in the bucket during cyclic and base load operation.

2005-06-22T23:59:59.000Z

80

Guideline for the Procurement of Buckets and Nozzles for General Electric MS7001 Model E/EA Gas Turbines  

Science Conference Proceedings (OSTI)

In recent years, a number of aftermarket component suppliers have begun offering replacement 1st, 2nd, and 3rd stage buckets and nozzles for the General Electric (GE) MS7001 Model E and EA gas turbine. Several different designs, materials, and casting processes have been offered for these components for operation over at different peak firing temperatures. This procurement guideline is intended to provide owners with the requirements necessary to procure all three stages of buckets and the first stage no...

2007-03-08T23:59:59.000Z

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.


81

Strain gauge installation tool  

DOE Patents (OSTI)

A tool and a method are disclosed for attaching a strain gauge to a test specimen by maintaining alignment of, and applying pressure to, the strain gauge during the bonding of the gauge to the specimen. The tool comprises rigid and compliant pads attached to a spring-loaded clamp. The pads are shaped to conform to the specimen surface to which the gauge is to be bonded. The shape of the pads permits the tool to align itself to the specimen and to maintain alignment of the gauge to the specimen during the bond curing process. A simplified method of attaching a strain gauge is provided by use of the tool. 6 figs.

Conard, L.M.

1998-06-16T23:59:59.000Z

82

Interactions between Rain and Wind Waves  

Science Conference Proceedings (OSTI)

Effects of rain on surface waves have been investigated in a circulating wind-wave tank. Surface displacement and slope spectra under different wind velocities were measured near the upwind and downwind edges of a region with simulated rains. ...

Ying-Keung Poon; Shih Tang; Jin Wu

1992-09-01T23:59:59.000Z

83

Rain Rate Estimates from Differential Polarization Measurements  

Science Conference Proceedings (OSTI)

This paper presents an analysis of the accuracy of rain rate estimates from data observed with a radar that has alternating horizontal and vertical polarization. Theoretical accuracies of rain rates from the reflectivity, the differential ...

M. Sachidananda; D. S. Zrni?

1987-12-01T23:59:59.000Z

84

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).

85

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

86

Cooling supply system for stage 3 bucket of a gas turbine  

DOE Patents (OSTI)

In a land based gas turbine including a compressor, a combustor and turbine section including at least three stages, an improvement comprising an inlet into a third stage nozzle from the compressor for feeding cooling air from the compressor to the third stage nozzle; at least one passageway running substantially radially through each airfoil of the third stage nozzle and an associated diaphragm, into an annular space between the rotor and the diaphragm; and passageways communicating between the annular space and individual buckets of the third stage.

Eldrid, Sacheverel Quentin (Saratoga Springs, NY); Burns, James Lee (Schenectady, NY); Palmer, Gene David (Clifton Park, NY); Leone, Sal Albert (Scotia, NY); Drlik, Gary Joseph (Fairfield, OH); Gibler, Edward Eugene (Cincinnati, OH)

2002-01-01T23:59:59.000Z

87

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. 9 figs.

Noel, B.W.; Borella, H.M.; Cates, M.R.; Turley, W.D.; MacArthur, C.D.; Cala, G.C.

1989-06-07T23:59:59.000Z

88

Rod examination gauge  

DOE Patents (OSTI)

The present invention is directed to a semi-automatic rod examination gauge for performing a large number of exacting measurements on radioactive fuel rods. The rod examination gauge performs various measurements underwater with remote controlled machinery of high reliability. The rod examination gauge includes instruments and a closed circuit television camera for measuring fuel rod length, free hanging bow measurement, diameter measurement, oxide thickness measurement, cladding defect examination, rod ovality measurement, wear mark depth and volume measurement, as well as visual examination. A control system is provided including a programmable logic controller and a computer for providing a programmed sequence of operations for the rod examination and collection of data.

Bacvinskas, W.S.; Bayer, J.E.; Davis, W.W.; Fodor, G.; Kikta, T.J.; Matchett, R.L.; Nilsen, R.J.; Wilczynski, R.

1991-12-31T23:59:59.000Z

89

The Hotplate Precipitation Gauge  

Science Conference Proceedings (OSTI)

A new instrument designed to measure precipitation, the “hotplate precipitation gauge,” is described. The instrument consists of a heated thin disk that provides a reliable, low-maintenance method to measure precipitation rate every minute ...

Roy M. Rasmussen; John Hallett; Rick Purcell; Scott D. Landolt; Jeff Cole

2011-02-01T23:59:59.000Z

90

Gauge/Gravity Duality (Gauge Gravity Duality)  

SciTech Connect

Gauge theories, which describe the particle interactions, are well understood, while quantum gravity leads to many puzzles. Remarkably, in recent years we have learned that these are actually dual, the same system written in different variables. On the one hand, this provides our most precise description of quantum gravity, resolves some long-standing paradoxes, and points to new principles. On the other, it gives a new perspective on strong interactions, with surprising connections to other areas of physics. I describe these ideas, and discuss current and future directions.

Polchinski, Joseph (Kavli Institute for Theoretical Physics)

2010-02-24T23:59:59.000Z

91

Advanced Rain/No-Rain Classification Methods for Microwave Radiometer Observations over Land  

Science Conference Proceedings (OSTI)

Seto et al. developed rain/no-rain classification (RNC) methods over land for the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI). In this study, the methods are modified for application to other microwave radiometers. The ...

Shinta Seto; Takuji Kubota; Nobuhiro Takahashi; Toshio Iguchi; Taikan Oki

2008-11-01T23:59:59.000Z

92

Evidence for an Oscillatory Rain Rate in a Midwestern Winter Rain  

Science Conference Proceedings (OSTI)

Rain rate during light precipitation in winter was measured with high temporal resolution optical systems at a site in Illinois. In addition to quasi-periodic variations, a clearly sinusoidal oscillation in rain rate was found imbedded in the ...

R. B. Fritz; R. J. Hill; J. T. Priestley; W. P. Schoenfeld

1988-02-01T23:59:59.000Z

93

The Relation between the Area-Average Rain Rate and the Rain Cell Size Distribution Parameters  

Science Conference Proceedings (OSTI)

A review of the literature on the rain cell diameter distribution (RCDD) is first presented. It shows that RCDD, for a given rain-rate threshold ?, is accurately described by an exponential distribution with an exponential parameter ? weakly ...

Henri Sauvageot; Frédéric Mesnard; Ricardo S. Tenório

1999-01-01T23:59:59.000Z

94

Plasma and operational conditions in a high species filter bucket source  

DOE Green Energy (OSTI)

Experimental details of operation and plasma flow are presented for bucket ion sources having magnetic flux that bridges the source between the regions of electron injection and ion extraction. The basic goal is to increase the atomic fraction of hydrogen and deuterium by 15% and yet retain an ion-flux-density uniformity over the extraction region to within +- 7%. A rod structure containing permanent magnets produces a known bridging flux filter across a well-defined region. This provides an experimental apparatus useful for the study of the effect of magnetic flux on the source plasma flow. The parameters of filter position, filter strength, filter orientation, arc power, and gas pressure are related to species fractions, profile uniformity, and electrical efficiency. The option of having the bridging flux without a rod structure is presented, and experimental results of sources thought to contain this field configuration are discussed.

Pincosy, P.A.; Ehlers, K.W.; Lietzke, A.F.

1986-10-01T23:59:59.000Z

95

Gravity in Gauge Mediation  

E-Print Network (OSTI)

We investigate O'Raifeartaigh-type models for F-term supersymmetry breaking in gauge mediation scenarios in the presence of gravity. It is pointed out that the vacuum structure of those models is such that in metastable vacua gravity mediation contribution to scalar masses is always suppressed to the level below 1 percent, almost sufficient for avoiding FCNC problem. Close to that limit, gravitino mass can be in the range 10-100 GeV, opening several interesting possibilities for gauge mediation models, including Giudice-Masiero mechanism for mu and Bmu generation. Gravity sector can include stabilized moduli.

Zygmunt Lalak; Stefan Pokorski; Krzysztof Turzynski

2008-08-04T23:59:59.000Z

96

Holographic Gauge Mediation  

SciTech Connect

We discuss gravitational backgrounds where supersymmetry is broken at the end of a warped throat, and the SUSY-breaking is transmitted to the Standard Model via gauginos which live in (part of) the bulk of the throat geometry. We find that the leading effect arises from splittings of certain 'messenger mesons,' which are adjoint KK-modes of the D-branes supporting the Standard Model gauge group. This picture is a gravity dual of a strongly coupled field theory where SUSY is broken in a hidden sector and transmitted to the Standard Model via a relative of semi-direct gauge mediation.

Benini, Francesco; /Princeton U.; Dymarsky, Anatoly; /Stanford U., ITP; Franco, Sebastian; /Santa Barbara, KITP; Kachru, Shamit; Simic, Dusan; /Stanford U., ITP /SLAC; Verlinde, Herman; /Princeton, Inst. Advanced Study

2009-06-19T23:59:59.000Z

97

Characteristics of Rain Integral Parameters during Tropical Convective, Transition, and Stratiform Rain at Gadanki and Its Application in Rain Retrieval  

Science Conference Proceedings (OSTI)

In the present study the characteristics of rain integral parameters during tropical convective (C), transition (T), and stratiform (S) types of rain are studied with the help of Joss–Waldvogel disdrometer (JWD), L-band, and very-high-frequency ...

Sanjay Sharma; Mahen Konwar; Diganta Kumar Sarma; M. C. R. Kalapureddy; A. R. Jain

2009-06-01T23:59:59.000Z

98

Gauge transformations in non-perturbative chiral gauge theories  

E-Print Network (OSTI)

We reconsider gauge-transformation properties in chiral gauge theories on the lattice observing all pertinent information and show that these properties are actually determined in a general way for any gauge group and for any value of the index. In our investigations we also clarify several related issues.

Werner Kerler

2005-07-20T23:59:59.000Z

99

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

100

Sources of Data on Freezing Rain and Resulting Damages  

Science Conference Proceedings (OSTI)

Freezing rain produces major damages each year in the United States, and various affected groups continue to seek data on the incidence and losses produced by freezing rain. The various kinds of data available about freezing rain and related ...

Stanley A. Changnon; Tamara G. Creech

2003-10-01T23:59:59.000Z

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.


101

Urban Modification of Freezing-Rain Events  

Science Conference Proceedings (OSTI)

A new national database for freezing-rain occurrences during the 1945–2000 period provided an opportunity for a study of the potential urban effects on freezing-rain events. Numerous past studies of snowfall events in urban areas have defined ...

Stanley A. Changnon

2003-06-01T23:59:59.000Z

102

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).

103

Gauge theory and group representations  

SciTech Connect

The mathematical foundations of gauge theories based on indecomposable representations of space-time symmetry groups are investigated. In particular, twistors and singletons are given a uniform treatment as gauge theories of this type. This is a step toward geometrically unifying all representation based gauge theories. In addition, some implications with respect to the geometric construction of group representations are noted.

Nakashima, M.M.

1988-01-01T23:59:59.000Z

104

A Study of Regional Precipitation Trends in Iceland Using a High-Quality Gauge Network and ERA-40  

Science Conference Proceedings (OSTI)

The climatic variability and trends of precipitation in Iceland are examined for the period 1961–2000 using bias-corrected rain gauge data and precipitation forecasts from the 40-yr ECMWF Re-Analysis (ERA-40). Several quantities are studied: the ...

Philippe Crochet

2007-09-01T23:59:59.000Z

105

Fiber optic gap gauge  

DOE Patents (OSTI)

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

106

Fabrication of gas turbine water-cooled composite nozzle and bucket hardware employing plasma spray process  

DOE Patents (OSTI)

In the method for fabrication of water-cooled composite nozzle and bucket hardware for high temperature gas turbines, a high thermal conductivity copper alloy is applied, employing a high velocity/low pressure (HV/LP) plasma arc spraying process, to an assembly comprising a structural framework of copper alloy or a nickel-based super alloy, or combination of the two, and overlying cooling tubes. The copper alloy is plamsa sprayed to a coating thickness sufficient to completely cover the cooling tubes, and to allow for machining back of the copper alloy to create a smooth surface having a thickness of from 0.010 inch (0.254 mm) to 0.150 inch (3.18 mm) or more. The layer of copper applied by the plasma spraying has no continuous porosity, and advantageously may readily be employed to sustain a pressure differential during hot isostatic pressing (HIP) bonding of the overall structure to enhance bonding by solid state diffusion between the component parts of the structure.

Schilke, Peter W. (4 Hempshire Ct., Scotia, NY 12302); Muth, Myron C. (R.D. #3, Western Ave., Amsterdam, NY 12010); Schilling, William F. (301 Garnsey Rd., Rexford, NY 12148); Rairden, III, John R. (6 Coronet Ct., Schenectady, NY 12309)

1983-01-01T23:59:59.000Z

107

Formalism for Comparing Rain Estimation Designs  

Science Conference Proceedings (OSTI)

Space-time averages of rain rates are needed in several applications. Nevertheless, they are difficult to estimate because the methods invariably leave gaps in the measurements in space or time. A formalism is developed which makes use of the ...

Gerald R. North; Shoichiro Nakamoto

1989-12-01T23:59:59.000Z

108

The Hunter Region (Australia) Acid Rain Project  

Science Conference Proceedings (OSTI)

Field measurements for the Hunter Region Acid Rain Project were conducted as a major co-operative effort by the New South Wales State Pollution Control Commission, the Electricity Commission of New South Wales, and the University of Newcastle in ...

Howard A. Bridgman; Robert Rothwell; Christopher Pang Way; Peng-Hing Tio

1988-03-01T23:59:59.000Z

109

Freezing Rain: An Observational and Theoretical Study  

Science Conference Proceedings (OSTI)

Data from a Doppler radar, an instrumented aircraft, and several rawinsonde observations during freezing rain and ice pellet events have been analyzed for this study. From these data, 34 soundings were obtained that characterized the vertical ...

Ryan J. Zerr

1997-12-01T23:59:59.000Z

110

Ballistic impulse gauge  

DOE Patents (OSTI)

This invention is comprised of a gauge for detecting the impulse generated in sample materials by X-rays or other impulse producing mechanisms which utilizes a pair of flat annular springs to support a plunger relative to a housing which may itself be supported by a pair of flat annular springs in a second housing. The plunger has a mounting plate mounted on one end and at the other, a position or velocity transducer is mounted. The annular springs consist of an outer ring and an inner ring with at least three arcuate members connecting the outer within the inner ring.

Ault, S.K.

1992-12-31T23:59:59.000Z

111

Cold cathode vacuum gauging system  

DOE Patents (OSTI)

A vacuum gauging system of the cold cathode type is provided for measuring the pressure of a plurality of separate vacuum systems, such as in a gas centrifuge cascade. Each casing is fitted with a gauge tube assembly which communicates with the vacuum system in the centrifuge casing. Each gauge tube contains an anode which may be in the form of a slender rod or wire hoop and a cathode which may be formed by the wall of the gauge tube. The tube is provided with an insulated high voltage connector to the anode which has a terminal for external connection outside the vacuum casing. The tube extends from the casing so that a portable magnet assembly may be inserted about the tube to provide a magnetic field in the area between the anode and cathode necessary for pressure measurements in a cold cathode-type vacuum gauge arrangement. The portable magnetic assembly is provided with a connector which engages the external high voltage terminal for providing power to the anode within in the gauge tube. Measurement is made in the same manner as the prior cold cathode gauges in that the current through the anode to the cathode is measured as an indication of the pressure. By providing the portable magnetic assembly, a considerable savings in cost, installation, and maintenance of vacuum gauges for pressure measurement in a gas centrifuge cascade is realizable.

Denny, Edward C. (Knoxville, TN)

2004-03-09T23:59:59.000Z

112

Warped General Gauge Mediation  

E-Print Network (OSTI)

We develop the formalism of "General gauge mediation" for five dimensional theories in a slice of AdS space. A set of current correlators encodes the effect of a supersymmetry breaking hidden sector localised on the IR brane. These current correlators provide a tree-level gaugino mass and loop-level sfermion masses on the UV brane. We also use this formalism to calculate the Casimir energy and masses for bulk hyperscalars. To illustrate this general construction we consider a perturbative hidden sector of generalised messengers coupled to a spurion. For models with large warping, we find that when the AdS warp factor $k$ is less than the characteristc mass scale $M$ of the hidden sector, the whole Kaluza-Klein tower of vector superfields propagate supersymmetry breaking effects to the UV brane. When $M$ is less than $k$, the zero modes dominate.

Moritz McGarrie; Daniel C. Thompson

2010-09-23T23:59:59.000Z

113

RADIOACTIVITY IN RAIN WATER IN BANGKOK  

SciTech Connect

In order to check the effect of nuclear explosions on the atmosphere over Bangkok, rain water was evaporated and the radioactivity of the residue obtained was counted by a G. M. counter. The result shows that the radioactivity in the rain water began to rise from the normal level since 26 September 1961, reached the maximum on 10 November 1961, and then slowly declined. Because the level of radiation remained above that of the Maximum Permissible Concentration (MPC) for only a short time, it did not constitute a health hazard. Analysis of the residue of rain water indicates that the increase in radiation is caused by the fall-out from the Russian tests of nuclear weapons in the air from September to October 1961. (auth)

Sundara-vicharana, Y.; Bhodigen, S.; Hayodom, V.

1961-12-01T23:59:59.000Z

114

2.4. Gauge R & R studies  

Science Conference Proceedings (OSTI)

... 2.4. Gauge R & R studies. ... What are the issues for a gauge R & R study? What are the design considerations for the study? ...

2013-10-30T23:59:59.000Z

115

Gauge transformations in lattice chiral theories  

E-Print Network (OSTI)

We show that gauge-transformation properties of correlation functions in chiral gauge theories on the finite lattice are determined in a general way.

Werner Kerler

2004-12-21T23:59:59.000Z

116

Rain initiation time in turbulent warm clouds  

E-Print Network (OSTI)

We present a mean-field model that describes droplet growth due to condensation and collisions and droplet loss due to fallout. The model allows for an effective numerical simulation. We study how the rain initiation time depends on different parameters. We also present a simple model that allows one to estimate the rain initiation time for turbulent clouds with an inhomogeneous concentration of cloud condensation nuclei. In particular, we show that over-seeding even a part of a cloud by small hygroscopic nuclei one can substantially delay the onset of precipitation.

Falkovich, G; Vucelja, M

2004-01-01T23:59:59.000Z

117

Rain initiation time in turbulent warm clouds  

E-Print Network (OSTI)

We present a mean-field model that describes droplet growth due to condensation and collisions and droplet loss due to fallout. The model allows for an effective numerical simulation. We study how the rain initiation time depends on different parameters. We also present a simple model that allows one to estimate the rain initiation time for turbulent clouds with an inhomogeneous concentration of cloud condensation nuclei. In particular, we show that over-seeding even a part of a cloud by small hygroscopic nuclei one can substantially delay the onset of precipitation.

G. Falkovich; M. G. Stepanov; M. Vucelja

2004-11-22T23:59:59.000Z

118

Changes in TRMM Rainfall due to the Orbit Boost Estimated from Buoy Rain Gauge Data  

Science Conference Proceedings (OSTI)

During the first three-and-a-half years of the Tropical Rainfall Measuring Mission (TRMM), the TRMM satellite operated at a nominal altitude of 350 km. To reduce drag, save maneuvering fuel, and prolong the mission lifetime, the orbit was boosted ...

Jeremy D. DeMoss; Kenneth P. Bowman

2007-09-01T23:59:59.000Z

119

Evaluation of PERSIANN-CCS Rainfall Measurement Using the NAME Event Rain Gauge Network  

Science Conference Proceedings (OSTI)

Robust validation of the space–time structure of remotely sensed precipitation estimates is critical to improving their quality and confident application in water cycle–related research. In this work, the performance of the Precipitation ...

Yang Hong; David Gochis; Jiang-tao Cheng; Kuo-lin Hsu; Soroosh Sorooshian

2007-06-01T23:59:59.000Z

120

Combining CMORPH and Rain Gauges Observations over the Rio Negro Basin  

Science Conference Proceedings (OSTI)

Several algorithms that combine daily precipitation surface data and satellite Climate Prediction Center Morphing Technique (CMORPH) estimations were implemented and tested for the Rio Negro basin in northeastern Uruguay. Bias removal of satellite ...

Alejandra De Vera; Rafael Terra

2012-12-01T23:59:59.000Z

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

Global Precipitation Retrievals Using the NOAA AMSU Millimeter-Wave Channels: Comparisons with Rain Gauges  

E-Print Network (OSTI)

A surface-precipitation-rate retrieval algorithm for 13-channel Advanced Microwave Sounding Unit (AMSU) millimeter-wave spectral observations from 23 to 191 GHz is described. It was trained using cloud-resolving fifth-generation ...

Surussavadee, Chinnawat

122

Geostatistical Mapping of Precipitation from Rain Gauge Data Using Atmospheric and Terrain Characteristics  

Science Conference Proceedings (OSTI)

A geostatistical framework for integrating lower-atmosphere state variables and terrain characteristics into the spatial interpolation of rainfall is presented. Lower-atmosphere state variables considered are specific humidity and wind, derived ...

Phaedon C. Kyriakidis; Jinwon Kim; Norman L. Miller

2001-11-01T23:59:59.000Z

123

Digitizing Chart Recorder Data: Coordinate System Conversion for Rain Gauges and Similar Recording Instruments  

Science Conference Proceedings (OSTI)

Though chart recorder data are widely available for many environmental parameters over long periods of record, the nonorthogonal coordinate systems of many types of recorder charts complicates data extraction such that it is almost always manual; ...

M. Todd Walter; Paul Mutch; Christa D. Salmon; Donald K. McCool; Lars O. Hedin

1999-08-01T23:59:59.000Z

124

Radar and Rain Gauge Analysis of the Extreme Rainfall during Hurricane Danny’s (1997) Landfall  

Science Conference Proceedings (OSTI)

As a minimal hurricane, Danny moved over Mobile Bay around 0900 UTC 19 July 1997 and became stationary by midmorning, while situated within a synoptic col. Danny then evolved into an asymmetric storm with an intensely convective rainband that ...

Jeffrey M. Medlin; Sytske K. Kimball; Keith G. Blackwell

2007-05-01T23:59:59.000Z

125

A Study of the Mechanisms of Acid Rain Formation  

Science Conference Proceedings (OSTI)

Samples of rain, snow, cloud water, aerosols and soil were collected in Colorado to study the mechanisms of acid rain formation. Chemical compositions of various types of samples were analyzed to investigate the stepwise incorporation of ...

Farn Parungo; Clarence Nagamoto; Robin Maddl

1987-11-01T23:59:59.000Z

126

The Rain Profiling Algorithm Applied to Polarimetric Weather Radar  

Science Conference Proceedings (OSTI)

The algorithm developed in this paper for ground-based polarimetric radars is derived from those used for the spaceborne rain radar of TRMM (Tropical Rainfall Measurement Mission)—the so-called rain profiling algorithms. The characteristic of ...

Jacques Testud; Erwan Le Bouar; Estelle Obligis; Mustapha Ali-Mehenni

2000-03-01T23:59:59.000Z

127

ARMAR: An Airborne Rain-Mapping Radar  

Science Conference Proceedings (OSTI)

A new airborne rain-mapping radar (ARMAR) has been developed by NASA and the Jet Propulsion Laboratory for operation on the NASA Ames DC-8 aircraft. The radar operates at 13.8 GHz, the frequency to be used by the radar on the Tropical Rainfall ...

S. L. Durden; E. Im; F. K. Li; W. Ricketts; A. Tanner; W. Wilson

1994-06-01T23:59:59.000Z

128

Estimation of Mean Rain Rate through Censoring  

Science Conference Proceedings (OSTI)

A mixed lognormal distribution is fit to rain-rate data to estimate the space–time average. To mitigate problems associated with biased data, data below a minimum and above a maximum threshold are treated as if they are at the respective ...

Donald Martin

1999-06-01T23:59:59.000Z

129

Determination of Oceanic Rain Rate and Rain Cell Structure from Altimeter Waveform Data. Part I: Theory  

Science Conference Proceedings (OSTI)

The predominant effect of rain on altimeter data is through the attenuation it causes of radar pulses propagating through it. Both the ERS-1 and TOPEX/Poseidon have recorded sharp decreases in the observed backscatter ?0, which have been ...

Graham D. Quartly

1998-12-01T23:59:59.000Z

130

A Probabilistic View on the Rain Drop Size Distribution Modeling: a Physical Interpretation of Rain Microphysics  

Science Conference Proceedings (OSTI)

The Rain Drop Size Distribution (RDSD) is defined as the relative frequency of raindrops per given diameter in a volume. This paper describes a mathematically-consistent modeling of the RDSD drawing on probability theory. It is shown that this ...

Francisco J. Tapiador; Ziad S. Haddad; Joe Turk

131

Principal Modes of Variation of Rain-Rate Probability Distributions  

Science Conference Proceedings (OSTI)

Radar or satellite observations of an area generate sequences of rain-rate maps. From a gridded map a histogram of rain rates can be obtained representing the relative areas occupied by rain rates of various strengths. The histograms vary with ...

Thomas L. Bell; R. Suhasini

1994-09-01T23:59:59.000Z

132

Building Gauge Theories: The Natural Way  

E-Print Network (OSTI)

The construction of a gauge field theory for elementary particles usually starts by promoting global invariance of the matter action to a local one, this in turn implying the introduction of gauge fields. We present here a procedure that runs the other way: starting from the action for gauge fields, matter is gauge invariantly coupled on the basis of Lorentz invariance and charge conservation. This natural approach prevents using the concept of particles separated from gauge fields that mediate interactions.

C. A. Garcia Canal; F. A. Schaposnik

2011-10-17T23:59:59.000Z

133

Gauge Interaction as Periodicity Modulation  

E-Print Network (OSTI)

The paper is devoted to a geometrical interpretation of gauge invariance in terms of the formalism of field theory in compact space-time dimensions [arXiv:0903.3680]. In this formalism, the kinematic information of an interacting elementary particle is encoded on the relativistic geometrodynamics of the boundary of the theory through local transformations of the underlying space-time coordinates. Therefore, gauge interaction is described as invariance of the theory under local deformations of the boundary, the resulting local variations of field solution are interpreted as internal transformations, and the internal symmetries of the gauge theory turn out to be related to corresponding local space-time symmetries. In the case of local infinitesimal isometric transformations, Maxwell's kinematics and gauge invariance are inferred directly from the variational principle. Furthermore we explicitly impose periodic conditions at the boundary of the theory as semi-classical quantization condition in order to investigate the quantum behavior of gauge interaction. In the abelian case the result is a remarkable formal correspondence with scalar QED.

Donatello Dolce

2011-10-03T23:59:59.000Z

134

Geometrical Methods in Gauge Theory  

E-Print Network (OSTI)

In this work we explore the geometrical interpretation of gauge theories through the formalism of fiber bundles. Moreover, we conduct an investigation in the topology of fiber bundles, providing a proof of the Classification Theorem. In the last chapter we present some applications, such as electromagnetism and generalized Kaluza-Klein Theory.

Henrique de A. Gomes

2006-10-25T23:59:59.000Z

135

Evaluation and performance prediction of cooling tower rain zones.  

E-Print Network (OSTI)

??Cooling tower rain zone performance characteristics such as the loss coefficient and the Merkel number are evaluated and simulated. To this end the influence of… (more)

Pierce, Darren John

2007-01-01T23:59:59.000Z

136

The greenhouse effect and acid rain  

DOE Green Energy (OSTI)

The concentrations of carbon dioxide, methane, sulfur dioxide, nitrous oxides and chlorofluorocarbons is increasing in the earth's atmosphere. Increased concentrations of these trace gases could lead to global warming, increased acid rain and increased UV radiation on the earth's surface; however, the actual impacts are still uncertain and are also the subject of great debate. Application of clean'' energy sources such as geothermal are obviously desirable for decreasing these effects and improving our overall general environment. This paper briefly summarizes the global environment concerns, providing a backdrop for the following papers which describe the geothermal role in future environmental considerations. 5 refs., 2 figs., 1 tab.

Traeger, R.K.

1990-01-01T23:59:59.000Z

137

A manifestly gauge invariant exact renormalization group  

E-Print Network (OSTI)

In these lectures we describe the construction of a gauge invariant renormalization group equation for pure non-Abelian gauge theory. In the process, a non-perturbative gauge invariant continuum Wilsonian effective action is precisely defined. The formulation makes sense without gauge fixing and thus manifest gauge invariance may be preserved at all stages. In the large N limit (of SU(N) gauge theory) the effective action simplifies: it may be expressed through a path integral for a single particle whose trajectory describes a Wilson loop. Regularization is achieved with the help of a set of Pauli-Villars fields whose formulation follows naturally in this picture. Finally, we show how the one loop beta function was computed, for the first time without any gauge fixing.

Tim R. Morris

1998-10-14T23:59:59.000Z

138

A gauge invariant exact renormalization group II  

E-Print Network (OSTI)

A manifestly gauge invariant and regularized renormalization group flow equation is constructed for pure SU(N) gauge theory in the large N limit. In this way we make precise and concrete the notion of a non-perturbative gauge invariant continuum Wilsonian effective action. Manifestly gauge invariant calculations may be performed, without gauge fixing, and receive a natural interpretation in terms of fluctuating Wilson loops. Regularization is achieved by covariant higher derivatives and by embedding in a spontaneously broken SU(N|N) supergauge theory; the resulting heavy fermionic vectors are Pauli-Villars fields. We prove the finiteness of this method to one loop and any number of external gauge fields. A duality is uncovered that changes the sign of the squared coupling constant. As a test of the basic formalism we compute the one loop beta function, for the first time without any gauge fixing, and prove its universality with respect to cutoff function.

Tim R. Morris

2000-06-09T23:59:59.000Z

139

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

140

Microsoft PowerPoint - 16.0855_Raines Draft Rev 4 | Department...  

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

0855Raines Draft Rev 4 Microsoft PowerPoint - 16.0855Raines Draft Rev 4 Microsoft PowerPoint - 16.0855Raines Draft Rev 4 More Documents & Publications Earned Value (EV) Analysis...

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

Comparison of Rain Rates over the Ocean Derived from TRMM Microwave Imager and Precipitation Radar  

Science Conference Proceedings (OSTI)

Surface rain rates over the ocean derived from the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) and precipitation radar (PR) are compared and systematic differences between TMI-derived rain rates and PR-derived rain rates are ...

Junji Ikai; Kenji Nakamura

2003-12-01T23:59:59.000Z

142

Rain Attenuation Prediction Model for Lagos at Millimeter Wave Bands  

Science Conference Proceedings (OSTI)

Rain Attenuation Prediction Model for Lagos at Millimeter Wave bands” is the subject of this work. Lagos (geog. Lat. 6.350N and Long. 3.20E), is a coastal station in the rain forest area in the South-Western Nigeria with an altitude of 380 ...

Abayomi Isiaka Yussuff; Nor Hisham Haji Khamis

143

The greenhouse effect and acid rain  

SciTech Connect

The concentrations of carbon dioxide, methane, sulfur dioxide, nitrous oxides and chlorofluorocarbons is increasing in the earth's atmosphere. Increased concentrations of these trace gases could lead to global warming, increased acid rain and increased UV radiation on the earth's surface; however, the actual impacts are still uncertain and are also the subject of great debate. Application of clean'' energy sources such as geothermal are obviously desirable for decreasing these effects and improving our overall general environment. This paper briefly summarizes the global environment concerns, providing a backdrop for the following papers which describe the geothermal role in future environmental considerations. 5 refs., 2 figs., 1 tab.

Traeger, R.K.

1990-01-01T23:59:59.000Z

144

Quantum Gauged Neural Network: U(1) Gauge Theory  

E-Print Network (OSTI)

A quantum model of neural network is introduced and its phase structure is examined. The model is an extension of the classical Z(2) gauged neural network of learning and recalling to a quantum model by replacing the Z(2) variables, $S_i = \\pm1$ of neurons and $J_{ij} =\\pm1$ of synaptic connections, to the U(1) phase variables, $S_i = \\exp(i\\phi_i)$ and $J_{ij} = \\exp(i\\theta_{ij}) $. These U(1) variables describe the phase parts of the wave functions (local order parameters) of neurons and synaptic connections. The model takes the form similar to the U(1) Higgs lattice gauge theory, the continuum limit of which is the well known Ginzburg-Landau theory of superconductivity. Its current may describe the flow of electric voltage along axons and chemical materials transfered via synaptic connections. The phase structure of the model at finite temperatures is examined by the mean-field theory, and Coulomb, Higgs and confinement phases are obtained. By comparing with the result of the Z(2) model, the quantum effects is shown to weaken the ability of learning and recalling.

Yukari Fujita; Tetsuo Matsui

2002-06-30T23:59:59.000Z

145

A gauge invariant exact renormalization group I  

E-Print Network (OSTI)

A manifestly gauge invariant continuous renormalization group flow equation is constructed for pure SU(N) gauge theory. The formulation makes sense without gauge fixing and manifestly gauge invariant calculations may thus be carried out. The flow equation is naturally expressed in terms of fluctuating Wilson loops, with the effective action appearing as an integral over a `gas' of Wilson loops. At infinite N, the effective action collapses to a path integral over the trajectory of a single particle describing one Wilson loop. We show that further regularization of these flow equations is needed. (This is introduced in part II.)

Tim R. Morris

1999-10-06T23:59:59.000Z

146

Acid rain: discerning the change in waters and woodlands  

Science Conference Proceedings (OSTI)

The research being done to establish the effects of acid rain on the earth's waters and woods is presented. It is pointed out that definitive answers cannot be possible because of the lack of scientifically credible, consistent, long-term data on trends. Various specific programs now under way to collect adequate data are highlighted. Researchers are not yet able to predict an area's susceptibility to acidic rain damage, but are more confident that acid rain is only a minimal threat to the earth's water and soil ecosystems. 13 figures.

Lihach, N.; Brocksen, R.; Goldstein, R.; Huckabee, J.; Kawaratani, R.; Mattice, J.; Murarka, I.; Perhac, R.

1983-11-01T23:59:59.000Z

147

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

148

The Effects of Rain on Topex Radar Altimeter Data  

Science Conference Proceedings (OSTI)

Rain has long been categorized as a contaminant of altimeter data, but little has been done previously to ascertain the magnitude and frequency of its effect or its geographical distribution. Proceeding from recent analysis of ERS-1 data, and the ...

G. D. Quartly; T. H. Guymer; M. A. Srokosz

1996-12-01T23:59:59.000Z

149

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

150

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

151

Freezing Rain Simulations for Fixed, Unheated Conductor Samples  

Science Conference Proceedings (OSTI)

The present paper reports on extensive experiments performed on short, fixed, unheated conductor samples in an outdoor freezing rain simulator. Their purpose is to relate the weight of ice (or, alternatively, the equivalent radial ice thickness) ...

M. L. Lu; N. Popplewell; A. H. Shah

2000-12-01T23:59:59.000Z

152

A Rain-Rate Retrieval Algorithm for Attenuated Radar Measurements  

Science Conference Proceedings (OSTI)

A dynamic regularization scheme for rain-rate retrievals from attenuated radar measurements is presented. Most regularization techniques, including the optimal estimation method, use the state-space parameters to regularize the problem, which ...

Prabhat K. Koner; Alessandro Battaglia; Clemens Simmer

2010-03-01T23:59:59.000Z

153

Comparison of Dual-Polarization Radar Estimators of Rain  

Science Conference Proceedings (OSTI)

Several polarimetric radar estimators of rain rate R and rainwater content M are examined. The accuracy of the estimators is analyzed using a gamma drop size distribution (DSD) simulation and a radar wavelength of 11 cm. The estimators that use ...

A. V. Ryzhkov; D. S. Zrni?

1995-04-01T23:59:59.000Z

154

Rain in Shallow Cumulus Over the Ocean: The RICO Campaign  

Science Conference Proceedings (OSTI)

Shallow, maritime cumuli are ubiquitous over much of the tropical oceans, and characterizing their properties is important to understanding weather and climate. The Rain in Cumulus over the Ocean (RICO) field campaign, which took place during ...

Robert M. Rauber; Harry T. Ochs III; L. Di Girolamo; S. Göke; E. Snodgrass; Bjorn Stevens; Charles Knight; J. B. Jensen; D. H. Lenschow; R. A. Rilling; D. C. Rogers; J. L. Stith; B. A. Albrecht; P. Zuidema; A. M. Blyth; C. W. Fairall; W. A. Brewer; S. Tucker; S. G. Lasher-Trapp; O. L. Mayol-Bracero; G. Vali; B. Geerts; J. R. Anderson; B. A. Baker; R. P. Lawson; A. R. Bandy; D. C. Thornton; E. Burnet; J-L. Brenguier; L. Gomes; P. R. A. Brown; P. Chuang; W. R. Cotton; H. Gerber; B. G. Heikes; J. G. Hudson; P. Kollias; S. K. Krueger; L. Nuijens; D. W. O'Sullivan; A. P. Siebesma; C. H. Twohy

2007-12-01T23:59:59.000Z

155

The Effects of Rain on ERS-1 Radar Altimeter Data  

Science Conference Proceedings (OSTI)

An investigation into a potentially important, but little-studied effect on altimeter data—rain contamination—has been carried out using ERS-1. The method involves identifying large changes in the radar backscatter coefficient and relating these ...

Trevor H. Guymer; Graham D. Quartly; Meric A. Srokosz

1995-12-01T23:59:59.000Z

156

A Climate Transect through Tropical Montane Rain Forest in Hawaii  

Science Conference Proceedings (OSTI)

Two years of climate data from a transect of three surface meteorological stations on the windward slopes of Mauna Loa, Hawaii, are analyzed. The stations constitute a transect between 700 and 1640 m through the wet, montane rain forest zone ...

James O. Juvik; Dennis Nullet

1994-11-01T23:59:59.000Z

157

The Development of Drop Size Distributions in Light Rain  

Science Conference Proceedings (OSTI)

A model of rain development based on the quasi-stochastic coalescence equation and including the sedimentation of drops has been used to study the formation of drop size distributions in conditions of weak updraft. Comparisons with “box model” ...

I. Zawadzki; E. Monteiro; F. Fabry

1994-04-01T23:59:59.000Z

158

An Overview of Acid Rain Monitoring Activities in North America  

Science Conference Proceedings (OSTI)

The various forms of acidic components that may be deposited from the atmosphere are reviewed. These components are classified into three categories: wet deposition (rain and snow), dry deposition (particles and gases), and special events (dews, ...

Joe Wisniewski; John D. Kinsman

1982-06-01T23:59:59.000Z

159

Variability of Space–Time Mean Rain Rate  

Science Conference Proceedings (OSTI)

A mixed lognormal distribution is fit to rain-rate data for the purpose of estimating the space–time mean. Using Fisher information, the large sample variance is obtained for grouped and ungrouped data estimates. The asymptotic variance results ...

B. Kedem; R. Pfeiffer; D. A. Short

1997-05-01T23:59:59.000Z

160

Estimating Rainfall in the Tropics Using the Fractional Time Raining  

Science Conference Proceedings (OSTI)

The relationship between the fractional time raining and tropical rainfall amount is investigated using raingage data and a point process model of tropical rainfall. Both the strength and the nature of the relationship are dependent upon the ...

Mark L. Morrissey; Witold F. Krajewski; Michael J. McPhaden

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.


161

Estimating the Uncertainty in Passive-Microwave Rain Retrievals  

Science Conference Proceedings (OSTI)

Current passive-microwave rain-retrieval methods are largely based on databases built offline using cloud models. Since the vertical distribution of hydrometeors within the cloud has a large impact on upwelling brightness temperatures, a forward ...

Dorothée Coppens; Ziad S. Haddad; Eastwood Im

2000-12-01T23:59:59.000Z

162

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

163

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

164

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

2010-11-25T23:59:59.000Z

165

Flavor mixing in gauge-Higgs unification  

SciTech Connect

Gauge-Higgs unification is the fascinating scenario solving the hierarchy problem without supersymmetry. In this scenario, the Standard Model (SM) Higgs doublet is identified with extra component of the gauge field in higher dimensions and its mass becomes finite and stable under quantum corrections due to the higher dimensional gauge symmetry. On the other hand, Yukawa coupling is provided by the gauge coupling, which seems to mean that the flavor mixing and CP violation do not arise at it stands. In this talk, we discuss that the flavor mixing is originated from simultaneously non-diagonalizable bulk and brane mass matrices. Then, this mechanism is applied to various flavor changing neutral current (FCNC) processes via Kaluza-Klein (KK) gauge boson exchange at tree level and constraints for compactification scale are obtained.

Adachi, Y.; Kurahashi, N.; Lim, C. S.; Maru, N.; Tanabe, K. [Department of Sciences, Matsue College of Technology, Matsue 690-8518 (Japan); Department of Physics, Kobe University, Kobe 657-8501 (Japan); Department of Physics, and Research and Education Center for Natural Sciences, Keio University, Yokohama 223-8521 (Japan); Department of Physics, Kobe University, Kobe 657-8501 (Japan)

2012-07-27T23:59:59.000Z

166

Test of the Specific Differential Propagation Phase Shift (KDP) Technique for Rain-Rate Estimation with a Ku-Band Rain Radar  

Science Conference Proceedings (OSTI)

The variation in drop size distribution (DSD) and the attenuation at higher frequencies are the two major impairments for quantitative rain-rate estimation. The sensitivity of rain-rate estimators (such as reflectivity factor Z, differential ...

K. Isiah Timothy; Toshio Iguchi; Yuji Ohsaki; Hiroaki Horie; Hiroshi Hanado; Hiroshi Kumagai

1999-08-01T23:59:59.000Z

167

Understanding the Importance of Microphysics and Macrophysics for Warm Rain in Marine Low Clouds. Part II: Heuristic Models of Rain Formation  

Science Conference Proceedings (OSTI)

Two simple heuristic model formulations for warm rain formation are introduced and their behavior explored. The first, which is primarily aimed at representing warm rain formation in shallow convective clouds, is a continuous collection model ...

Robert Wood; Terence L. Kubar; Dennis L. Hartmann

2009-10-01T23:59:59.000Z

168

Gauging Improvements in Urban Building Energy Policy in India  

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

Gauging Improvements in Urban Building Energy Policy in India Title Gauging Improvements in Urban Building Energy Policy in India Publication Type Conference Proceedings Year of...

169

Thermodynamics, Hydrodynamics and Critical Phenomena in Strongly Coupled Gauge Theories.  

E-Print Network (OSTI)

??The gauge theory / string theory correspondence has led to great progress in the study of strongly-coupled gauge theories. In this work, we start with… (more)

Pagnutti, Christopher

2011-01-01T23:59:59.000Z

170

Relation between hydrogen isotopic ratios of bone collagen and rain  

Science Conference Proceedings (OSTI)

The hydrogen isotopic value ([delta]D) of deer bone collagen is related to both [delta]D of rain during the growing season and growing season relative humidity (RH). With correction for the effects of RH, bone [delta]D is related to growing season rain [delta]D in a simple manner with a slope of 1.0. This indicates that, with RH correction, there are no additional sources of bias in the [delta]D of bone due to unaccounted for biologic or climatic effects. Due to a low sensitivity of bone [delta]D to RH effects, both yearly and growing season rain [delta]D can be estimated with considerable accuracy (R = 0.97 and R = 0.96) from bone collagen [delta]D and [delta][sup 15]N. Here, [delta][sup 15]N is used to correct bone [delta]D for the effects of RH. From these estimates of rain [delta]D, it may then be possible to evaluate temperature since the [delta]D of rain primarily reflects local temperature. Therefore, the measurement of bone collagen [delta]D has good potential for evaluating paleoclimates.

Cormie, A.B.; Schwarcz, H.P. (McMaster Univ., Hamilton, Ontario (Canada)); Gray, J. (Univ. of Alberta, Edmonton (Canada))

1994-01-01T23:59:59.000Z

171

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

Science Conference Proceedings (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

172

Rainy-Season Duration Estimated from OLR versus Rain Gauge Data and the 2001 Drought in Southeast Brazil  

Science Conference Proceedings (OSTI)

Large precipitation deficits observed during the 2001 austral summer over the southeast region of Brazil contributed to the worsening of the energy crisis that was occurring in the country, with unprecedented social and economic consequences. ...

Sergio H. Franchito; V. Brahmananda Rao; Paulo R. B. Barbieri; Clovis M. E. Santo

2008-05-01T23:59:59.000Z

173

Translational-invariant noncommutative gauge theory  

Science Conference Proceedings (OSTI)

A generalized translational-invariant noncommutative field theory is analyzed in detail, and a complete description of translational-invariant noncommutative structures is worked out. The relevant gauge theory is described, and the planar and nonplanar axial anomalies are obtained.

Ardalan, F. [Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran (Iran, Islamic Republic of); Institute for Studies in Theoretical Physics and Mathematics (IPM), School of Physics, P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Sadooghi, N. [Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran (Iran, Islamic Republic of)

2011-01-15T23:59:59.000Z

174

An Improved Model of Direct Gauge Mediation  

E-Print Network (OSTI)

We present a new, improved model of gauge mediation of dynamical SUSY Breaking: the model does not have gauge messengers or $\\sim 10$ TeV scalars charged under the Standard Model (SM), thus avoiding the problem of negative (mass)$^2$ for supersymmetric SM (SSM) scalars faced by some earlier models. The gauge mediation is direct, i.e., the messengers which communicate SUSY breaking to the SSM fields carry quantum numbers of the gauge group which breaks SUSY. These messenger fields couple to a modulus field. The model has a very simple particle content: the modulus and the messengers are the only chiral superfields (other than the SSM fields) in the model. The inverted hierarchy mechanism is used to generate a local SUSY breaking minimum for the modulus field in a perturbative regime thus making the model calculable.

Agashe, K S

1998-01-01T23:59:59.000Z

175

A Deep-Sea Differential Pressure Gauge  

Science Conference Proceedings (OSTI)

A pressure gauge configured to respond to the difference between the ocean pressure and the pressure within a confined volume of compressible oil is found to be especially useful for detecting pressure fluctuations in the frequency range from a ...

Charles Cox; Thomas Deaton; Spahr Webb

1984-09-01T23:59:59.000Z

176

Galilean Covariance versus Gauge Invariance Germain Rousseaux  

E-Print Network (OSTI)

existence of a superior principle called Gauge Symmetry which would rule all the laws of Physics: Phys- ical-343, 1997. [17] E. Guyon, J.-P. Hulin, L. Petit and C. D. Mitescu, Phys- ical Hydrodynamics, Oxford

Paris-Sud XI, Université de

177

GAUGE AND HIGGS BOSONS --- 1998 UPDATE  

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

GAUGE AND HIGGS BOSONS in the 1998 Review of Particle Physics Please use this CITATION: C. Caso et al. (Particle Data Group), The European Physical Journal C3 (1998) 1 Cut-off date...

178

Towards Gravity-Gauge-Higgs Unification  

E-Print Network (OSTI)

We discuss a possibility to solve the gauge hierarchy problem in the framework of Gravity-Gauge-Higgs Unification scenario. We have calculated 1-loop correction to the mass of the scalar field, which is originated from 55-component of the metric, in five dimensional gravity theory with the bulk scalar field compactified on S^1. It is shown that the quadratic divergences are canceled and the finite mass is generated by explicit diagrammatic calculations and the effective potential calculations.

K. Hasegawa; C. S. Lim; Nobuhito Maru

2004-08-24T23:59:59.000Z

179

Chaotic thermalization in classical gauge theories  

SciTech Connect

We explore the idea that chaos concepts might be useful for understanding the thermalization in gauge theories. The SU(2) Higgs model is discussed as a prototype of system with gauge fields coupled to matter fields. Through the numerical solution of the equations of motion, we are able to characterize chaotic behavior via the corresponding Lyapunov exponent. Then it is demonstrated that the system's approach to equilibrium can be understood through direct application of the principles of Statistical Mechanics.

Woitek, Marcio; Krein, Gastao [Instituto de Fisica Teorica, Universidade Estadual Paulista Rua Dr. Bento Teobaldo Ferraz, 271 - Bloco II, Sao Paulo, SP (Brazil)

2013-05-06T23:59:59.000Z

180

New biology of red rain extremophiles prove cometary panspermia  

E-Print Network (OSTI)

This paper reports the extraordinary biology of the microorganisms from the mysterious red rain of Kerala, India. These chemosynthetic organisms grow optimally at an extreme high temperature of 300 degrees C in hydrothermal conditions and can metabolize inorganic and organic compounds including hydrocarbons. Stages found in their life cycle show reproduction by a special multiple fission process and the red cells found in the red rain are identified as the resting spores of these microbes. While these extreme hyperthermophiles contain proteins, our study shows the absence of DNA in these organisms, indicating a new primitive domain of life with alternate thermostable genetics. This new biology proves our earlier hypothesis that these microbes are of extraterrestrial origin and also supports our earlier argument that the mysterious red rain of Kerala is due to the cometary delivery of the red spores into the stratosphere above Kerala.

Godfrey Louis; A. Santhosh Kumar

2003-12-29T23:59:59.000Z

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.


181

Quantum simulations of gauge theories with ultracold atoms: local gauge invariance from angular momentum conservation  

E-Print Network (OSTI)

Quantum simulations of High Energy Physics, and especially of gauge theories, is an emerging and exciting direction in quantum simulations. However, simulations of such theories, compared to simulations of condensed matter physics, must satisfy extra restrictions, such as local gauge and Lorentz invariance. In this paper we discuss these special requirements, and present a new method for quantum simulation of lattice gauge theories using ultracold atoms. This method allows to include local gauge invariance as a fundamental symmetry of the atomic Hamiltonian, arising from natural atomic interactions and conservation laws (and not as a property of a low energy sector). This allows us to implement elementary gauge invariant interactions for three lattice gauge theories: compact QED (U(1)), SU(N) and Z_N, which can be used to build quantum simulators in 1+1 dimensions. We also present a new loop method, which uses the elementary interactions as building blocks in the effective construction of quantum simulations for d+1 dimensional lattice gauge theories (d>1), without having to use Gauss's law as a constraint, as in previous proposals. We discuss in detail the quantum simulation of 2+1 dimensional compact QED and provide a numerical proof of principle. The simplicity of the already gauge invariant elementary interactions of this model suggests it may be useful for future experimental realizations.

Erez Zohar; J. Ignacio Cirac; Benni Reznik

2013-03-20T23:59:59.000Z

182

On a New Approach for Instantaneous Rain Area Delineation in the Midlatitudes Using GOES Data  

Science Conference Proceedings (OSTI)

Using satellite and weather radar data, a simple clustering analysis has been used in order to differentiate between raining and nonraining clouds. Based on these results, a scheme is proposed for instantaneous rain area delineation in the ...

A. A. Tsonis; G. A. Isaac

1985-11-01T23:59:59.000Z

183

Quantitative Measurements of Path-Integrated Rain Rate by an Airborne Microwave Radiometer over the Ocean  

Science Conference Proceedings (OSTI)

Data on the airborne microwave radiometer, which is one of the sensors of the airborne microwave rain-scatterometer/radiometer (AMRS) system, are analyzed to infer path-integrated rain rate measured from topside. The equation of radiative ...

Masaharu Fujita; Ken'ichi Okamoto; Harunobu Masuko; Takeyuki Ojima; Nobuyoshi Fugono

1985-09-01T23:59:59.000Z

184

Possible Misidentification of Rain Type by TRMM PR over Tibetan Plateau  

Science Conference Proceedings (OSTI)

Rain-type statistics derived from Tropical Rainfall Measuring Mission (TRMM) precipitation radar (PR) standard product show that some 70% of raining pixels in the central Tibetan Plateau summer are stratiform—a clear contradiction to the common ...

Yunfei Fu; Guosheng Liu

2007-05-01T23:59:59.000Z

185

Sensitivity of the Estimated Monthly Convective Rain Fraction to the Choice of Z–R Relation  

Science Conference Proceedings (OSTI)

This study investigates the sensitivity of the estimated monthly convective rain fraction—that is, the percentage of the areal rain accumulation contributed by precipitation identified as convective—to variations of the Z–R parameters used in ...

Matthias Steiner; Robert A. Houze Jr.

1997-05-01T23:59:59.000Z

186

Satellite Passive Microwave Rain Rate Measurement over Croplands during Spring, Summer and Fall  

Science Conference Proceedings (OSTI)

Rain rate algorithms for spring, summer and fall that have been developed from comparisons between the brightness temperatures measured by the Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) and rain rates derived from operational WSR-...

Roy W. Spencer

1984-11-01T23:59:59.000Z

187

Comparisons of Instantaneous TRMM Ground Validation and Satellite Rain-Rate Estimates at Different Spatial Scales  

Science Conference Proceedings (OSTI)

This study provides a comprehensive intercomparison of instantaneous rain rates observed by the two rain sensors aboard the Tropical Rainfall Measuring Mission (TRMM) satellite with ground data from two regional sites established for long-term ...

David B. Wolff; Brad L. Fisher

2008-08-01T23:59:59.000Z

188

Comparison of Simulated Rain Rates from Disdrometer Data Employing Polarimetric Radar Algorithms  

Science Conference Proceedings (OSTI)

Disdrometer data collected during three spring days, with moderate to heavy rain in the Norman, Oklahoma region are used with various polarimetric radar algorithms to simulate rain rates. It is assumed that available measurables are 1) ...

N. Balakrishnan; Dúsan S. Zrni?; Julius Goldhirsh; John Rowland

1989-06-01T23:59:59.000Z

189

Incorporating Satellite Observations of “No Rain” in an Australian Daily Rainfall Analysis  

Science Conference Proceedings (OSTI)

Geostationary satellite observations can be used to distinguish potential rain-bearing clouds from nonraining areas, thereby providing surrogate observations of “no rain” over large areas. The advantages of including such observations are the ...

Elizabeth E. Ebert; Gary T. Weymouth

1999-01-01T23:59:59.000Z

190

Computer-Controlled Automated Rain Sampler (CCARS) for Rainfall Measurement and Sequential Sampling  

Science Conference Proceedings (OSTI)

The Computer-Controlled Automated Rain Sampler (CCARS) is a combination rain gage and sequential sampler for precipitation chemistry measurements. The primary objectives of the design are low cost, versatility of operational mode, and remote ...

Stan D. Tomich; M. Terry Dana

1990-08-01T23:59:59.000Z

191

Estimation of Rain and Hail Rates in Mixed-Phase Precipitation  

Science Conference Proceedings (OSTI)

Precipitation comprising rain and hail is studied. Specifically, techniques to identify and quantify such precipitation in terms of rain and hail fall rates using dual polarized radar data, are presented. Included for consideration are ZH, the ...

N. Balakrishnan; D. S. Zrni?

1990-03-01T23:59:59.000Z

192

Observations of Precipitation Size and Fall Speed Characteristics within Coexisting Rain and Wet Snow  

Science Conference Proceedings (OSTI)

Ground-based measurements of particle size and fall speed distributions using a Particle Size and Velocity (PARSIVEL) disdrometer are compared among samples obtained in mixed precipitation (rain and wet snow) and rain in the Oregon Cascade ...

Sandra E. Yuter; David E. Kingsmill; Louisa B. Nance; Martin Löffler-Mang

2006-10-01T23:59:59.000Z

193

Optimal Thresholds for the Estimation of Area Rain-Rate Moments by the Threshold Method  

Science Conference Proceedings (OSTI)

Optimization of the threshold method, achieved by determination of the threshold that maximizes the correlation between an area-average rain-rate moment and the area coverage of rain rates exceeding the threshold, is demonstrated empirically and ...

David A. Short; Kunio Shimizu; Benjamin Kedem

1993-02-01T23:59:59.000Z

194

A Synoptic Overview of a Heavy Rain Event in Southern China  

Science Conference Proceedings (OSTI)

The meteorological events surrounding the heavy rains of 23–25 June 1983 in the Yangtze River Valley of China are investigated. The rains developed along a persistent quasi-stationary frontal boundary that separated warm, moist tropical air from ...

Kai-Yu Ma; Lance F. Bosart

1987-06-01T23:59:59.000Z

195

The Supercooled Warm Rain Process and the Specification of Freezing Precipitation  

Science Conference Proceedings (OSTI)

About 30% of freezing precipitation cases are observed to occur in a subfreezing atmosphere (contrary to the classical melting ice model). We explain these cases with the concept of the “supercolled warm rain process” (SWRP): the warm rain ...

George J. Huffman; Gene Alfred Norman Jr.

1988-11-01T23:59:59.000Z

196

Apparatus for the Simulation of Rain in the Laboratory  

Science Conference Proceedings (OSTI)

Simulated rains are produced by directing a jet of water toward the periphery of an automobile tire that rotates opposite to the flow of water. The air and mechanical turbulence created by the rotating tire surface break the jet up into a spray ...

David R. Derenzo; Bernard Vonnegut

1981-01-01T23:59:59.000Z

197

Is Virga Rain That Evaporates before Reaching the Ground?  

Science Conference Proceedings (OSTI)

The visual phenomenon called virga, a sudden change in the brightness of a precipitation shaft below a cloud, is commonly attributed to evaporation of raindrops. It is said to be rain that does not reach the ground. The optical thickness of an ...

Alistair B. Fraser; Craig F. Bohren

1992-08-01T23:59:59.000Z

198

Polarimetric Attenuation Correction in Heavy Rain at C Band  

Science Conference Proceedings (OSTI)

The ability of C-band polarimetric radar to account for strong attenuation/differential attenuation is demonstrated in two cases of heavy rain that occurred in the Chicago, Illinois, metropolitan area on 5 August 2008 and in central Oklahoma on ...

Ji-Young Gu; A. Ryzhkov; P. Zhang; P. Neilley; M. Knight; B. Wolf; Dong-In Lee

2011-01-01T23:59:59.000Z

199

The Impacts of Different Satellite Data on Rain Estimation Schemes  

Science Conference Proceedings (OSTI)

Rain estimates for the Great Plains States were made for a one-month period, August 1979, using different combinations of satellite and other data. The data tested were as follows: 1) two satellite images per day without any other data, 2) four ...

Donald P. Wylie; Denise Laitsch

1983-07-01T23:59:59.000Z

200

The Effect of Rain in Calming the Sea  

Science Conference Proceedings (OSTI)

The effect of rain in damping surface waves appears to be significant in the estimation of wind speed from the backscatter of radar signal from the sea surface. The radar backscatter depends on the small-scale roughness of the sea surface. This ...

M. N. Tsimplis

1992-04-01T23:59:59.000Z

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.


201

Drop shapes and fall speeds in rain: two contrasting examples  

Science Conference Proceedings (OSTI)

Two rain events are analyzed using two collocated 2D-video disdrometers (2DVD) and a C band polarimetric radar at 15 km distance. Both events had moderate-to-intense rainfall rates, but the second event had an embedded convective line. For the ...

M. Thurai; V. N. Bringi; W. A. Petersen; P. N. Gatlin

202

Probing Hurricanes with Stable Isotopes of Rain and Water Vapor  

Science Conference Proceedings (OSTI)

Rain and water vapor were collected during flights in Hurricanes Olivia (1994), Opal (1995), Marilyn (1995), and Hortense (1995) and analyzed for their stable isotopic concentrations, or ratios, H218O:H2O and HDO:H2O. The spatial patterns and ...

Stanley Gedzelman; James Lawrence; John Gamache; Michael Black; Edward Hindman; Robert Black; Jason Dunion; Hugh Willoughby; Xiaoping Zhang

2003-06-01T23:59:59.000Z

203

Forcing Versus Feedback: Epidemic Malaria and Monsoon Rains in Northwest India  

E-Print Network (OSTI)

Forcing Versus Feedback: Epidemic Malaria and Monsoon Rains in Northwest India Karina Laneri1 the monsoonal rains. Consideration of a more complex model with clinical immunity demonstrates the robustness Feedback: Epidemic Malaria and Monsoon Rains in Northwest India. PLoS Comput Biol 6(9): e1000898. doi:10

Pascual, Mercedes

204

Gauge-Higgs Unification in six dimensions  

E-Print Network (OSTI)

Motivated by the pressing problem of the ``little hierarchies'', the possibility of realizing a consistent model of Electroweak Symmetry Breaking via the so-called ``Gauge-Higgs Unification Mechanism'' is discussed. We identify a class of 6 dimensional SU(3) gauge models in which a single Higgs doublet originates from the internal components of the gauge fields. The Higgs mass is beautifully predicted at the tree-level to be twice the $W$-boson mass. At the quantum level, a 1-loop quadratically divergent localized operator is generated and it can contribute to the Higgs mass, reintroducing then the little hierarchy problem. We show that, in some particular case, the presence of this operator does not destabilize the Electroweak Symmetry Breaking Scale and we obtain a framework in which realistic models could be formulated.

Andrea Wulzer

2004-05-19T23:59:59.000Z

205

Feynman rules for Coulomb gauge QCD  

Science Conference Proceedings (OSTI)

The Coulomb gauge in nonabelian gauge theories is attractive in principle, but beset with technical difficulties in perturbation theory. In addition to ordinary Feynman integrals, there are, at 2-loop order, Christ-Lee (CL) terms, derived either by correctly ordering the operators in the Hamiltonian, or by resolving ambiguous Feynman integrals. Renormalization theory depends on the sub-graph structure of ordinary Feynman graphs. The CL terms do not have a sub-graph structure. We show how to carry out renormalization in the presence of CL terms, by re-expressing these as 'pseudo-Feynman' integrals. We also explain how energy divergences cancel. - Highlights: Black-Right-Pointing-Pointer In Coulomb gauge QCD, we re-express Christ-Lee terms in the Hamiltonian as pseudo-Feynman integrals. Black-Right-Pointing-Pointer This gives a subgraph structure, and allows the ordinary renormalization process. Black-Right-Pointing-Pointer It also leads to cancellation of energy-divergences.

Andrasi, A. [Rudjer Boskovic Institute, Zagreb (Croatia)] [Rudjer Boskovic Institute, Zagreb (Croatia); Taylor, J.C., E-mail: jct@damtp.cam.ac.uk [Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge (United Kingdom)

2012-10-15T23:59:59.000Z

206

Performance of stem flow gauges in greenhouse and desert environments  

DOE Green Energy (OSTI)

This study was conducted to evaluate the accuracy and general performance of a heat balance method for estimating transpirational sap flow through plant stems on two tree species in greenhouse and field experiments in Tucson, Arizona. Sap flow through 20-mm diameter stems of oak (Quercus virginiana `Heritage`) and mesquite (Prosopis alba `Colorado`.) trees in containers was measured using stem flow gauges and a precision balance, from January to October, 1991. Overall gauge accuracy, and the effects of gauge location on the tree stem, gauge ventilation, gauge insulation, sheath conductance factor (Ksh) selection method, and increased numbers of vertical thermocouple pairs on gauge performance were evaluated.

Levitt, D.G. [Reynolds Electrical and Engineering Co., Inc., Las Vegas, NV (United States); Simpson, J.R. [California Univ., Davis, CA (United States). Dept. of Environmental Horticulture; Tipton, J.L. [Arizona Univ., Tucson, AZ (United States). Dept. of Plant Sciences

1995-06-01T23:59:59.000Z

207

Signatures of confinement in axial gauge QCD  

SciTech Connect

A comparative dynamical study of axial gauge QED and QCD is presented. Elementary excitations associated with particular field configurations are investigated. Gluonic excitations analogous to linearly polarized photons are shown to acquire infinite energy. Suppression of this class of excitations in QCD results from quantization of the chromo-electric flux and is interpreted as a dual Meissner effect, i.e., as expulsion from the QCD vacuum of chromo-electric fields which are constant over significant distances. This interpretation is supported by a comparative evaluation of the interaction energy of static charges in the axial gauge representation of QED and QCD. {copyright} 1995 Academic Press, Inc.

Lenz, F. [Institute for Theoretical Physics, University of Erlangen-Nuernberg, Staudtstrasse 7, 91058 Erlangen (Germany)]|[Center for Theoretical Physics, Laboratory for Nuclear Science, MIT, Cambridge, Massachusetts 02139 (United States); Moniz, E.J. [Center for Theoretical Physics, Laboratory for Nuclear Science, MIT, Cambridge, Massachusetts 02139 (United States)]|[Institute for Theoretical Physics, University of Erlangen-Nuernberg, Staudtstrasse 7, 91058 Erlangen (Germany); Thies, M. [Institute for Theoretical Physics, University of Erlangen-Nuernberg, Staudtstrasse 7, 91058 Erlangen (Germany)

1995-09-01T23:59:59.000Z

208

Gauged Axions and their QCD Interactions  

Science Conference Proceedings (OSTI)

We present a brief overview of axion models associated to anomalous abelian (gauge) symmetries, discussing their main phenomenological features. Among these, the mechanism of vacuum misalignment introduced at the QCD and at the electroweak phase transitions, with the appearance of periodic potentials, responsible for the generation of a mass for these types of axions.

Coriano, Claudio; Mariano, Antonio [Dipartimento di Fisica, Universita del Salento and INFN Sezione di Lecce, Via Arnesano 73100 Lecce (Italy); Guzzi, Marco [Department of Physics, Southern Methodist University, Dallas, TX 75275-0175 (United States)

2010-12-22T23:59:59.000Z

209

Cosmological properties of a gauged axion  

SciTech Connect

We analyze the most salient cosmological features of axions in extensions of the standard model with a gauged anomalous extra U(1) symmetry. The model is built by imposing the constraint of gauge invariance in the anomalous effective action, which is extended with Wess-Zumino counterterms. These generate axionlike interactions of the axions to the gauge fields and a gauged shift symmetry. The scalar sector is assumed to acquire a nonperturbative potential after inflation, at the electroweak phase transition, which induces a mixing of the Stueckelberg field of the model with the scalars of the electroweak sector, and at the QCD phase transition. We discuss the possible mechanisms of sequential misalignments which could affect the axions of these models, and generated, in this case, at both transitions. We compute the contribution of these particles to dark matter, quantifying their relic densities as a function of the Stueckelberg mass. We also show that models with a single anomalous U(1) in general do not account for the dark energy, due to the presence of mixed U(1)-SU(3) anomalies.

Coriano, Claudio; Mariano, Antonio [Dipartimento di Fisica, Universita del Salento, Via Arnesano 73100 Lecce (Italy) and INFN Sezione di Lecce, Via Arnesano 73100 Lecce (Italy); Guzzi, Marco [Department of Physics, Southern Methodist University, Dallas Texas 75275 (United States); Lazarides, George [Physics Division, School of Technology, Aristotle University of Thessaloniki, Thessaloniki 54124 (Greece)

2010-09-15T23:59:59.000Z

210

Exotic Gauge Bosons in the 331 Model  

SciTech Connect

We analize the bosonic sector of the 331 model which contains exotic leptons, quarks and bosons (E,J,U,V) in order to satisfy the weak gauge SU(3){sub L} invariance. We develop the Feynman rules of the entire kinetic bosonic sector which will let us to compute some of the Z(0)' decays modes.

Romero, D.; Ravinez, O.; Diaz, H.; Reyes, J. [Instituto de Fisica Universidad Nacional de Ingenieria (Peru)

2009-04-30T23:59:59.000Z

211

Gauge Theories, D-Branes and Holography  

E-Print Network (OSTI)

Based on a generalization of the string theoretic concept of D-brane probe, we propose a new approach to large N gauge theories which makes the holographic properties manifest. For any gauge theory, we define from first principles an effective action for a fixed number of "probe" D-branes in the presence of N "background" D-branes on which the gauge theory lives. This effective action is shown to encode all the information about the large N gauge theory. The analysis of the planar diagram expansion which computes the effective action yields a simple and generic mechanism explaining the emergence of holographic space dimensions: the probe D-branes move in a higher dimensional dual holographic space-time. The construction yields a new perspective on the notion of bulk space-time locality and draws unexpected links with some aspects of the 't Hooft Abelian projection ideas. It also provides a new non-perturbative approximation scheme, able to capture both the weak and strong coupling regimes. We sketchily illustrate the basic ideas on a few examples, including the pure four dimensional Yang-Mills theory.

Frank Ferrari

2013-10-24T23:59:59.000Z

212

Monitoring the Stability of Satellite Altimeters with Tide Gauges  

Science Conference Proceedings (OSTI)

A method is described for using tide gauge sea levels to monitor time-dependent drift in satellite altimetric measurements of sea surface height. The method depends on a careful assessment of the quality of the tide gauge measurements available ...

Gary T. Mitchum

1998-06-01T23:59:59.000Z

213

Emerging of massive gauge particles in inhomogeneous local gauge transformations: replacement of Higgs mechanism  

E-Print Network (OSTI)

A generalized theory of gauge transformations is presented on the basis of the covariant Hamiltonian formalism of field theory, for which the covariant canonical field equations are equivalent to the Euler-Lagrange field equations. Similar to the canonical transformation theory of point dynamics, the canonical transformation rules for fields are derived from generating functions. Thus---in contrast to the usual Lagrangian description---the covariant canonical transformation formalism automatically ensures the mappings to preserve the action principle, and hence to be {\\em physical}. On that basis, we work out the theory of inhomogeneous local gauge transformations that generalizes the conventional local SU(N) gauge transformation theory. It is shown that massive gauge bosons naturally emerge in this description, which thus could supersede the Higgs mechanism.

Jürgen Struckmeier

2013-03-26T23:59:59.000Z

214

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

Science Conference Proceedings (OSTI)

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

Andreev, Oleg [Arnold Sommerfeld Center for Theoretical Physics, LMU-Muenchen, Theresienstrasse 37, 80333 Muenchen (Germany)

2010-04-15T23:59:59.000Z

215

Prospects for Multiple Weak Gauge Boson Production at Supercollider Energies  

E-Print Network (OSTI)

We discuss the prospects for observing multiple weak gauge boson production at the SSC and LHC. We summarize conventional perturbative cross sections for processes involving 1-6 final state weak gauge bosons and compare them with more speculative scenarios including 1) a toy model of a strongly interacting Higgs sector patterned after hadronic multipion production and 2) the nonperturbative production of O(30) weak gauge bosons in a weakly coupled gauge sector.

D. A. Morris

1993-08-24T23:59:59.000Z

216

An exact RG formulation of quantum gauge theory  

E-Print Network (OSTI)

A gauge invariant Wilsonian effective action is constructed for pure SU(N) Yang-Mills theory by formulating the corresponding flow equation. Manifestly gauge invariant calculations can be performed i.e. without gauge fixing or ghosts. Regularisation is implemented in a novel way which realises a spontaneously broken SU(N|N) supergauge theory. As an example we sketch the computation of the one-loop beta function, performed for the first time without any gauge fixing.

Tim R. Morris

2001-02-19T23:59:59.000Z

217

A class of gauges for the Einstein equations  

E-Print Network (OSTI)

A class of gauges for the Einstein vacuum equations is introduced, along with three symmetric hyperbolic systems. The first implies the local realizability of the gauge. The second is the dynamical subset of the field equations. The third is used to show that the constraints propagate. The gauges are for an orthonormal frame formalism, with first order, quadratically nonlinear equations. The unknowns are 16 frame components and 28 connection components. After gauge-fixing, a total of 33 remain.

Michael Reiterer; Eugene Trubowitz

2011-04-26T23:59:59.000Z

218

Coulomb gauge Green functions and Gribov copies in SU(2) lattice gauge theory  

E-Print Network (OSTI)

We reconsider the lattice measurement of Green functions in Coulomb gauge, both in 2+1 and 3+1 dimensions, using an improved gauge fixing scheme. The influence of Gribov copies is examined and we find clear indications that Green functions are more strongly affected than previously assumed, in particular for low momenta. Qualitatively, our improved lattice results in the infra-red compare more favourably with recent continuum calculations in the Hamiltonian approach.

M. Quandt; G. Burgio; S. Chimchinda; H. Reinhardt

2007-10-02T23:59:59.000Z

219

Computing a Probability Distribution for the Start of the Rains from a Markov Chain Model for Precipitation  

Science Conference Proceedings (OSTI)

The start of the rains is defined to be the first day, or two-day rain spell, in which greater than a specified total amount of rain occurs. A method of calculating the probability distribution of the start of the rains from a Markov chain model ...

R. D. Stern

1982-03-01T23:59:59.000Z

220

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

2013-08-29T23:59:59.000Z

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.


221

Determination of equivalent circuit for PVDF shock-pressure gauges  

SciTech Connect

Broadband impedance measurements of a PVDF shock-pressure gauge are used to build an equivalent circuit for the gauge. The essential components are a gauge capacitance and a low-loss transmission line. Component features are consistent with the physical characteristics. With knowledge of this circuit, troublesome oscillations can be anticipated and prevented.

Kotulski, J.D.; Anderson, M.U.; Brock, B.C.; Gomez, J.; Graham, R.A.; Vittitoe, C.N.

1993-07-01T23:59:59.000Z

222

Determination of equivalent circuit for PVDF shock-pressure gauges  

SciTech Connect

Broadband impedance measurements of a PVDF shock-pressure gauge are used to build an equivalent circuit for the gauge. The essential components are a gauge capacitance and a low-loss transmission line. Component features are consistent with the physical characteristics. With knowledge of this circuit, troublesome oscillations can be anticipated and prevented. [copyright]American Institute of Physics

Kotulski, J.D.; Anderson, M.U.; Brock, B.C.; Gomez, J.; Graham, R.A.; Vittitoe, C.N. (Sandia National Laboratories, Albuquerque, New Mexico 87185-5800 (United States))

1994-07-10T23:59:59.000Z

223

Approximate gauge symmetry of composite vector bosons  

SciTech Connect

It can be shown in a solvable field theory model that the couplings of the composite vector bosons made of a fermion pair approach the gauge couplings in the limit of strong binding. Although this phenomenon may appear accidental and special to the vector bosons made of a fermion pair, we extend it to the case of bosons being constituents and find that the same phenomenon occurs in a more intriguing way. The functional formalism not only facilitates computation but also provides us with a better insight into the generating mechanism of approximate gauge symmetry, in particular, how the strong binding and global current conservation conspire to generate such an approximate symmetry. Remarks are made on its possible relevance or irrelevance to electroweak and higher symmetries.

Suzuki, Mahiko [Lawrence Berkeley National Laboratory and Department of Physics, University of California, Berkeley, California 94720 (United States)

2010-08-15T23:59:59.000Z

224

Approximate gauge symemtry of composite vector bosons  

SciTech Connect

It can be shown in a solvable field theory model that the couplings of the composite vector mesons made of a fermion pair approach the gauge couplings in the limit of strong binding. Although this phenomenon may appear accidental and special to the vector bosons made of a fermion pair, we extend it to the case of bosons being constituents and find that the same phenomenon occurs in more an intriguing way. The functional formalism not only facilitates computation but also provides us with a better insight into the generating mechanism of approximate gauge symmetry, in particular, how the strong binding and global current conservation conspire to generate such an approximate symmetry. Remarks are made on its possible relevance or irrelevance to electroweak and higher symmetries.

Suzuki, Mahiko

2010-06-01T23:59:59.000Z

225

Search for new heavy charged gauge bosons  

SciTech Connect

Additional gauge bosons are introduced in many theoretical extensions to the Standard Model. A search for a new heavy charged gauge boson W{prime} decaying into an electron and a neutrino is presented. The data used in this analysis was taken with the D0 detector at the Fermilab proton-antiproton collider at a center-of-mass energy of 1.96 TeV and corresponds to an integrated luminosity of about 1 fb{sup -1}. Since no significant excess is observed in the data, an upper limit is set on the production cross section times branching fraction {sigma}{sub W{prime}}xBr (W{prime} {yields} e{nu}). Using this limit, a W{prime} boson with mass below {approx}1 TeV can be excluded at the 95% confidence level assuming that the new boson has the same couplings to fermions as the Standard Model W boson.

Magass, Carsten Martin; /RWTH Aachen U.

2007-11-01T23:59:59.000Z

226

A viable axion from gauged flavor symmetries  

E-Print Network (OSTI)

We consider a string inspired non-supersymmetric extension of the standard model with gauged anomalous U(1) flavor symmetries. Consistency requires the Green-Schwarz mechanism to cancel mixed anomalies. The additional required scalars provide Stuckelberg masses for the $Z'$ particles associated to the gauged flavor symmetry, so they decouple at low energies. Our models also include a complex scalar field $\\phi$ to generate Froggatt-Nielsen mass terms for light particles giving a partial solution to the fermion mass problem. A residual approximate (anomalous) global symmetry survives at low energies. The associated pseudo-Goldstone mode is the phase of the $\\phi$ scalar field, and it becomes the dominant contribution to the physical axion. An effective field theory analysis that includes neutrino masses gives a prediction for the axion decay constant. We find a simple modeI where the axion decay constant is in the center of the allowed window.

Berenstein, David

2010-01-01T23:59:59.000Z

227

Neutrino and Z gauge boson physics  

SciTech Connect

We present a short review of the physics of neutrino-photon interactions and the rare decays of the Z and Z Prime gauge bosons. In particular, we emphasize on processes induced by the anomalous trilinear and quartic vertices VVV and VVVV, where V=Z,Z Prime or a photon, within the Standard Model (SM), the 331 model and some extensions of the SM. We also include the phenomenological and experimental limits reported for these couplings.

Larios, F. [Departamento de Fisica Aplicada, CINVESTAV-Merida, A.P. 73, 97310 Merida, Yucatan (Mexico); Perez, M. A. [Departamento de Fisica, CINVESTAV, A.P. 14-740, 07000, Mexico D.F (Mexico)

2013-06-12T23:59:59.000Z

228

Chiral symmetry and lattice gauge theory  

E-Print Network (OSTI)

I review the problem of formulating chiral symmetry in lattice gauge theory. I discuss recent approaches involving an infinite tower of additional heavy states to absorb Fermion doublers. For hadronic physics this provides a natural scheme for taking quark masses to zero without requiring a precise tuning of parameters. A mirror Fermion variation provides a possible way of extending the picture to chirally coupled light Fermions. Talk presented at "Quark Confinement and the Hadron Spectrum," Como, Italy, 20-24 June 1994.

Michael Creutz

1994-10-19T23:59:59.000Z

229

Chiral symmetry and lattice gauge theory  

Science Conference Proceedings (OSTI)

I review the problem of formulating chiral symmetry in lattice gauge theory. I discuss recent approaches involving an infinite tower of additional heavy states to absorb Fermion doublers. For hadronic physics this provides a natural scheme for taking quark masses to zero without requiring a precise tuning of parameters. A mirror Fermion variation provides a possible way of extending the picture to chirally coupled light Fermions.

Creutz, M.

1994-08-01T23:59:59.000Z

230

The gauged BPS baby Skyrme model  

E-Print Network (OSTI)

The baby Skyrme model is a well-known nonlinear field theory supporting topological solitons in two space dimensions. In the limit where the term quadratic in derivatives (the "sigma model term") vanishes some additional structure emerges. The resulting ("extreme" or "restricted" or "BPS") baby Skyrme model has exact soliton solutions saturating a BPS bound which exists for this restricted model. Further, the restricted model has infinitely many symmetries and infinitely many conservation laws. Here we consider the gauged version of the restricted baby Skyrme model with gauge group U(1) and the usual Maxwell term for the gauge field. We find that, again, there exists a BPS bound and BPS solutions saturating this bound. We further find that the whole problem is essentially determined by a new kind of superpotential equation. The BPS bound and the corresponding BPS solitons only may exist for potentials such that the superpotential equation has a solution which exists globally, i.e., on the whole target space. ...

Adam, C; Sanchez-Guillen, J; Wereszczynski, A

2012-01-01T23:59:59.000Z

231

Results of Seeding for Dynamic Effects on Rain-Cell Properties in FACE-2  

Science Conference Proceedings (OSTI)

Volume scan radar studies incorporating the use of an elaborate method of defining and tracking convective rain cells through their lifetime have been used to

Abraham Gagin; Daniel Rosenfeld; William L. Woodley; Raul E. Lopez

1986-01-01T23:59:59.000Z

232

Mass spectrum and thermodynamics of quasiconformal gauge theories from gauge/gravity duality  

SciTech Connect

We use gauge/gravity duality to study simultaneously the mass spectrum and the thermodynamics of a generic quasiconformal gauge theory, specified by its beta function. The beta function of a quasiconformal theory almost vanishes, and the coupling is almost constant between two widely separated energy scales. Depending on whether the gravity dual has a black hole or not, the mass spectrum is either a spectrum of quasinormal oscillations or a normal T=0 mass spectrum. The mass spectrum is quantitatively correlated with the thermal properties of the system. As the theory approaches conformality, the masses have to vanish. We show that in this limit, the masses calculated via gauge/gravity duality satisfy expected scaling properties.

Alanen, J.; Kajantie, K. [Department of Physics, P.O. Box 64, FI-00014 University of Helsinki (Finland); Helsinki Institute of Physics, P.O. Box 64, FI-00014 University of Helsinki (Finland); Alho, T.; Tuominen, K. [Helsinki Institute of Physics, P.O. Box 64, FI-00014 University of Helsinki (Finland); Department of Physics, University of Jyvaeskylae (Finland)

2011-10-15T23:59:59.000Z

233

Revealing the Winds Under the Rain. Part I. Passive Microwave Rain Retrievals Using a New, Observations-Based, Parameterization of Sub-Satellite Rain Variability and Intensity: Algorithm Description.  

Science Conference Proceedings (OSTI)

Scatterometer ocean surface winds have been providing very valuable information to researchers and operational weather forecasters for over ten years. However, the scatterometer wind retrievals are compromised when rain is present. Merely flagging ...

S. M. Hristova-Veleva; P. S. Callahan; R. S. Dunbar; B. W. Stiles; S. H. Yueh; J. N. Huddleston; S. V. Hsiao; G. Neumann; M. H. Freilich; B. A. Vanhoff; R. W. Gaston; E. Rodriguez; D. E. Weissman

234

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

235

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

236

Flux Measurements of Pulsating Rain with a Disdrometer and Doppler Radar during Phase II of the Joint Tropical Rain Experiment in Malaysia  

Science Conference Proceedings (OSTI)

During the Joint Tropical Rain Experiment of the Malaysian Meteorological Service and the University of Toronto, pulsating raindrop ensembles, hereafter pulses, were observed in and around Penang Island. Using a Doppler radar on 25 October 1990, ...

Greg M. McFarquhar; Roland List; David R. Hudak; Robert P. Nissen; J. S. Dobbie; N. P. Tung; T. S. Kang

1996-06-01T23:59:59.000Z

237

A New Framework for Gauge Theory of Gravity  

Science Conference Proceedings (OSTI)

In this talk we present some conceptual new ideas to face the formulation of gauge theory including space?time symmetries. As a particular case

E. Sánchez?Sastre

2006-01-01T23:59:59.000Z

238

Generation of Neutrino Masses and Mixings in Gauge Theories  

E-Print Network (OSTI)

I review models which present large flavor mixings of the lepton sector based on the gauge theory. (Invited talk at WIN99) 1

Morimitsu Tanimoto

1999-01-01T23:59:59.000Z

239

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

240

Divergences of generalized quantum electrodynamics on the Lorenz gauge  

Science Conference Proceedings (OSTI)

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

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

Gauge conservation laws in a general setting. Superpotential  

E-Print Network (OSTI)

The fact that the conserved current of a gauge symmetry is reduced to a superpotential is proved in a very general setting.

Sardanashvily, G

2009-01-01T23:59:59.000Z

242

Temporal and Spatial Variations of Freezing Rain in the Contiguous United States: 1948–2000  

Science Conference Proceedings (OSTI)

A new freezing-rain-days database was used to define the spatial and temporal distributions of freezing-rain days across the contiguous United States. The database contained 988 stations, spanning the period 1948–2000. Areas averaging one or more ...

Stanley A. Changnon; Thomas R. Karl

2003-09-01T23:59:59.000Z

243

Processes Influencing Rain-Field Growth and Decay after Tropical Cyclone Landfall in the United States  

Science Conference Proceedings (OSTI)

This study measured rain-field sizes for tropical cyclones (TCs) after U.S. landfall and related changes in size to the diurnal cycle and extratropical transition (ET). For 45 TC landfalls, the spatial properties of the rain fields were calculated ...

Corene J. Matyas

2013-05-01T23:59:59.000Z

244

Properties of the Threshold Method on a Radar Rain Cluster Basis  

Science Conference Proceedings (OSTI)

The average rain rate R is estimated with radar data at the radar beam height by measuring the fractional area F(?) of pixels above a preset rain-rate threshold ?. This work applies the “threshold method” to smaller areas. The threshold method ...

L. Li; S. Sénési

1997-11-01T23:59:59.000Z

245

Stratiform Rain in the Tropics as Seen by the TRMM Precipitation Radar  

Science Conference Proceedings (OSTI)

Across the Tropics (20°N–20°S), the Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) indicates that for reflectivities ?17 dBZ, stratiform precipitation accounts for 73% of the area covered by rain and 40% of the total rain ...

Courtney Schumacher; Robert A. Houze Jr.

2003-06-01T23:59:59.000Z

246

Correcting Active Scatterometer Data for the Effects of Rain Using Passive Radiometer Data  

Science Conference Proceedings (OSTI)

A model for the effects of rain on scatterometer data is proposed. Data from the Advanced Microwave Scanning Radiometer (AMSR) and the SeaWinds scatterometer, both on the Midori-II satellite, are used. The model includes three basic rain effects: ...

K. A. Hilburn; F. J. Wentz; D. K. Smith; P. D. Ashcroft

2006-03-01T23:59:59.000Z

247

The role of gauge symmetry in spintronics  

SciTech Connect

In this work we employ a field theoretical approach to explain the nature of the non-conserved spin current in spintronics. In particular, we consider the usual U(1) gauge theory for the electromagnetism at classical level in order to obtain the broken continuity equation involving the spin current and spin-transfer torque. Inspired by the recent work of A. Vernes, B. L. Gyorffy and P. Weinberger where they obtain such an equation in terms of relativistic quantum mechanics, we formalize their result in terms of the well known currents of field theory such as the Bargmann-Wigner current and the chiral current. Thus, an interpretation of spintronics is provided in terms of Noether currents (conserved or not) and symmetries of the electromagnetism. In fact, the main result of the present work is that the non-conservation of the spin current is associated with the gauge invariance of physical observables where the breaking term is proportional to the chiral current. Moreover, we generalize their result by including the electromagnetic field as a dynamical field instead of an external one.

Sobreiro, R.F., E-mail: sobreiro@if.uff.br [UFF - Universidade Federal Fluminense, Instituto de Fisica, Campus da Praia Vermelha, Av. General Milton Tavares de Souza s/n, 24210-346, Niteroi, RJ (Brazil); Vasquez Otoya, V.J. [IFSEMG - Instituto Federal de Educacao, Ciencia e Tecnologia do Sudeste de Minas Gerais, Rua Bernardo Mascarenhas 1283, 36080-001, Juiz de Fora, MG (Brazil)

2011-12-15T23:59:59.000Z

248

The Higgs sector of gravitational gauge theories  

E-Print Network (OSTI)

Gravitational gauge theories with de Sitter, Poincare and affine symmetry group are investigated under the aspect of the breakdown of the initial symmetry group down to the Lorentz subgroup. We review the theory of spontaneously broken de Sitter gravity by Stelle and West and apply a similar approach to the case of the Poincare and affine groups. Especially, we find that the groundstate of the metric affine theory leads to the determination of the Lorentzian signature of the metric in the groundstate. We show that the Higgs field remains in its groundstate, i.e., that the metric will have Lorentzian signature, unless we introduce matter fields that explicitely couple to the symmetric part of the connection. We also show that some features, like the necessity of the introduction of a dilaton field, that seem artificial in the context of the affine theory, appear most natural if the gauge group is taken to be the special linear group in five dimensions. Finally, we present an alternative model which is based on the spinor representation of the Lorentz group and is especially adopted to the description of spinor fields in a general linear covariant way, without the use of the infinite dimensional representations which are usually considered to be unavoidable.

M. Leclerc

2005-02-02T23:59:59.000Z

249

Assessing the Relative Performance of Microwave-Based Satellite Rain-Rate Retrievals Using TRMM Ground Validation Data  

Science Conference Proceedings (OSTI)

Spaceborne microwave sensors provide critical rain information used in several global multisatellite rain products, which in turn are used for a variety of important studies, including landslide forecasting, flash flood warning, data assimilation,...

David B. Wolff; Brad L. Fisher

2009-06-01T23:59:59.000Z

250

Non-Rayleigh Scattering Effect in Rain Observations by an X- and Ka-band Dual-Wavelength Radar  

Science Conference Proceedings (OSTI)

The effect of non-Rayleigh scattering appearing in a rain observation experiment using a dual-wavelength rain radar, is investigated. The non-Rayleigh scattering effect causes a small difference between the effective radar reflectivity factor and ...

Kenji Nakamura; Hideyuki Inomata

1991-06-01T23:59:59.000Z

251

Search for gauge extensions of the MSSM at the LHC  

SciTech Connect

The extensions of the minimal supersymmetric model (MSSM), driving mainly from the need to solve the {mu} problem, involve novel matter species and gauge groups. These extended MSSM models can be searched for at the LHC via the effects of the gauge and Higgs bosons or their fermionic partners. Traditionally, the focus has been on the study of the extra forces induced by the new gauge and Higgs bosons present in such models. An alternative way of studying such effects is through the superpartners of matter species and the gauge forces. We thus consider a U(1)' gauge extension of the MSSM, and perform an extensive study of the signatures of the model through the production and decays of the scalar quarks and gluino, which are expected to be produced copiously at the LHC. After a detailed study of the distinctive features of such models with regard to the signatures at the LHC, we carry out a detailed Monte Carlo analysis of the signals from the process pp{yields}n leptons+m jets+Ee{sub T}, and compare the resulting distributions with those predicted by the MSSM. Our results show that the searches for the extra gauge interactions in the supersymmetric framework can proceed not only through the forces mediated by the gauge and Higgs bosons but also through the superpartner forces mediated by the gauge and Higgs fermions. Analysis of the events induced by the squark/gluino decays presented here is complementary to the direct Z' searches at the LHC.

Ali, Ahmed [Deutsches Elektronen - Synchrotron DESY, Notkestr. 85, D-22603 Hamburg (Germany); Demir, Durmus A. [Deutsches Elektronen - Synchrotron DESY, Notkestr. 85, D-22603 Hamburg (Germany); Department of Physics, Izmir Institute of Technology, IZTECH, TR35430 Izmir (Turkey); Frank, Mariana; Turan, Ismail [Department of Physics, Concordia University, 7141 Sherbrooke St. West, Montreal, Quebec, H4B 1R6 (Canada)

2009-05-01T23:59:59.000Z

252

Development of a Low-Cost Tide Gauge  

Science Conference Proceedings (OSTI)

A low-cost tide gauge was developed and field tested to demonstrate a technology that would enable more cost-effective and greater sampling of spatially variable water levels and ocean surface waves. The gauge was designed to be adaptable to ...

Mark F. Giardina; Marshall D. Earle; John C. Cranford; Daniel A. Osiecki

2000-04-01T23:59:59.000Z

253

Searches for new gauge bosons at future colliders  

SciTech Connect

The search reaches for new gauge bosons at future hadron and lepton colliders are summarized for a variety of extended gauge models. Experiments at these energies will vastly improve over present limits and will easily discover a Z` and/or W` in the multi-TeV range.

Rizzo, T.G.

1996-09-01T23:59:59.000Z

254

IDENTIFYING ABBERANT SEGMENTS IN PERMANENT DOWNHOLE GAUGE DATA  

E-Print Network (OSTI)

for interpretation of subsurface conditions in a well. The data from permanent downhole gauges are voluminous the world supplying continuous real time data about subsurface reservoir conditions. Permanent downhole gauges are used in reservoir monitoring and management by interpreting the pressure, flow rate

255

Hydrodynamic gradient expansion in gauge theory plasmas  

E-Print Network (OSTI)

We utilize the fluid-gravity duality to investigate the large order behavior of hydrodynamic gradient expansion of the dynamics of a gauge theory plasma system. This corresponds to the inclusion of dissipative terms and transport coefficients of very high order. Using the dual gravity description, we calculate numerically the form of the stress tensor for a boost-invariant flow in a hydrodynamic expansion up to terms with 240 derivatives. We observe a factorial growth of gradient contributions at large orders, which indicates a zero radius of convergence of the hydrodynamic series. Furthermore, we identify the leading singularity in the Borel transform of the hydrodynamic energy density with the lowest nonhydrodynamic excitation corresponding to a `nonhydrodynamic' quasinormal mode on the gravity side.

Michal P. Heller; Romuald A. Janik; Przemyslaw Witaszczyk

2013-02-04T23:59:59.000Z

256

Gauge field localization on brane worlds  

Science Conference Proceedings (OSTI)

We consider the effects of spacetime curvature and brane thickness on the localization of gauge fields on a brane via kinetic terms induced by localized fermions. We find that in a warped geometry with an infinitely thin brane, both the infrared and the ultraviolet behavior of the electromagnetic propagator are affected, providing a more stringent bound on the brane's tension than that coming from the requirement of four-dimensional gravity on the brane. On the other hand, for a thick wall in a flat spacetime, where the fermions are localized by means of a Yukawa coupling, we find that four-dimensional electromagnetism is recovered in a region bounded from above by the same critical distance appearing in the thin case, but also from below by a new scale related to the brane's thickness and the electromagnetic couplings. This imposes very stringent bounds on the brane's thickness which seem to invalidate the localization mechanism for this case.

Guerrero, Rommel; Rodriguez, R. Omar [Departamento de Fisica, Universidad Centroccidental Lisandro Alvarado, 400 Barquisimeto (Venezuela, Bolivarian Republic of); Melfo, Alejandra; Pantoja, Nelson [Centro de Fisica Fundamental, Universidad de Los Andes, Merida (Venezuela, Bolivarian Republic of)

2010-04-15T23:59:59.000Z

257

Bulk Higgs with 4D Gauge Interactions  

E-Print Network (OSTI)

We consider a model with an extra compact dimension in which the Higgs is a bulk field while all other Standard Model fields are confined on a brane. We find that four-dimensional gauge invariance can still be achieved by appropriate modification of the brane action. This changes accordingly the Higgs propagator so that, the Higgs, in all its interactions with Standard Model fields, behaves as an ordinary 4D field, although it has a bulk kinetic term and bulk self-interactions. In addition, it cannot propagate from the brane to the bulk and, thus, no charge can escape into the bulk but it remains confined on the brane. Moreover, the photon remains massless, while the dependence of the Higgs vacuum on the extra dimension induces a mixing between the graviphoton and the Z-boson. This results in a modification of the sensitive \\rho-parameter.

Alex Kehagias; Kyriakos Tamvakis

2005-07-14T23:59:59.000Z

258

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

259

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

260

Atomic Quantum Simulation of Lattice Gauge-Higgs Model: Higgs Couplings and Emergence of Exact Local Gauge Symmetry  

E-Print Network (OSTI)

Recently, the possibility of quantum simulation of dynamical gauge fields was pointed out by using a system of cold atoms trapped on each link in an optical lattice. However, to implement exact local gauge invariance, fine-tuning the interaction parameters among atoms is necessary. In the present paper, we study the effect of violation of the U(1) local gauge invariance by relaxing the fine-tuning of the parameters and showing that a wide variety of cold atoms is still to be a faithful quantum simulator for a U(1) gauge-Higgs model containing a Higgs field sitting on sites. Clarification of the dynamics of this gauge-Higgs model sheds some lights upon various unsolved problems including the inflation process of the early universe. We study the phase structure of this model by Monte Carlo simulation, and also discuss the atomic characteristics of the Higgs phase in each simulator.

Kenichi Kasamatsu; Ikuo Ichinose; Tetsuo Matsui

2012-12-20T23:59:59.000Z

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

The confining N = 1 supersymmetric gauge theories: A review  

Science Conference Proceedings (OSTI)

The authors give a classification and overview of the confining N = 1 supersymmetric gauge theories. For simplicity they consider only theories based on simple gauge groups and no tree-level superpotential. Classification of these theories can be done according to whether or not there is a superpotential generated for the confined degrees of freedom. The theories with the superpotential include s-confining theories and also theories where the gauge fields participate in the confining spectrum, while theories with no superpotential include theories with a quantum deformed moduli space and theories with an affine moduli space.

Csaki, C. [Univ. of California, Berkeley, CA (United States). Dept. of Physics]|[Lawrence Berkeley National Lab., CA (United States). Physics Div.

1998-08-01T23:59:59.000Z

262

Multi-Higgs Mass Spectrum in Gauge-Higgs Unification  

E-Print Network (OSTI)

We study an SU(2) supersymmetric gauge model in a framework of gauge-Higgs unification. Multi-Higgs spectrum appears in the model at low energy. We develop a useful perturbative approximation scheme for evaluating effective potential to study the multi-Higgs mass spectrum. We find that both tree-massless and massive Higgs scalars obtain mass corrections of similar size from finite parts of the loop effects. The corrections modify multi-Higgs mass spectrum, and hence, the loop effects are significant in view of future verifications of the gauge-Higgs unification scenario in high-energy experiments.

Kojima, Kentaro; Yamashita, Toshifumi

2008-01-01T23:59:59.000Z

263

Australian Heavy-Rain Days and Associated East Coast Cyclones: 1958–92  

Science Conference Proceedings (OSTI)

The authors present a comprehensive climatology of heavy rain and east coast cyclones from January 1958 to September 1992. A total of 80 cyclones, including nondeveloping systems, were objectively identified from daily rainfall and surface wind ...

Linda C. Hopkins; Greg J. Holland

1997-04-01T23:59:59.000Z

264

Rain Enhancement and Fog Elimination by Seeding with Charged Droplets. Part I: Theory and Numerical Simulations  

Science Conference Proceedings (OSTI)

A new method of droplet collision acceleration, with the purpose of rain enhancement and fog elimination, is proposed. According to the method, some fraction of the droplets is taken from clouds (or fog) themselves, charged, and then injected ...

A. Khain; V. Arkhipov; M. Pinsky; Y. Feldman; Ya Ryabov

2004-10-01T23:59:59.000Z

265

Analysis of Short Space–Time-Scale Variability of Oceanic Rain Using TOPEX/Jason  

Science Conference Proceedings (OSTI)

Information on the spatial and temporal variability of rain rate is important not only for meteorology and hydrology but also for the design of remote sensing and in situ measuring or of millimeter wave communication systems. The Ocean Topography ...

J. Tournadre; S. Bhandari

2009-01-01T23:59:59.000Z

266

Drop Shapes, Model Comparisons, and Calculations of Polarimetric Radar Parameters in Rain  

Science Conference Proceedings (OSTI)

Drop shapes derived from a previously conducted artificial rain experiment using a two-dimensional video disdrometer (2DVD) are presented. The experiment involved drops falling over a distance of 80 m to achieve their terminal velocities as well ...

M. Thurai; G. J. Huang; V. N. Bringi; W. L. Randeu; M. Schönhuber

2007-06-01T23:59:59.000Z

267

On the Shape–Slope Relation of Drop Size Distributions in Convective Rain  

Science Conference Proceedings (OSTI)

The relation between the slope and shape parameters of the raindrop size distribution parameterized by a gamma distribution is examined. The comparison of results of a simple rain shaft model with an empirical relation based on disdrometer ...

Axel Seifert

2005-07-01T23:59:59.000Z

268

Infrared and Visible Satellite Rain Estimation. Part II: A Cloud Definition Approach  

Science Conference Proceedings (OSTI)

This study examines the relationships between satellite infrared clouds and rainfall, and infrared-threshold visible clouds and rainfall. Clouds are defined by the outline of the 253 K isotherm. Cloud infrared area was highly correlated with rain ...

Andrew J. Negri; Robert F. Adler

1987-11-01T23:59:59.000Z

269

A Physically Based, Nondimensional Parameter for Discriminating between Locations of Freezing Rain and Ice Pellets  

Science Conference Proceedings (OSTI)

A nondimensional parameter is presented that can he used to help distinguish between conditions favorable for the occurrence of freezing rain and ice pellets. The parameter was derived from the well-established condition that most incidents of ...

Robert R. Czys; Robert W. Scott; K. C. Tang; Ronald W. Przybylinski; Michael E. Sabones

1996-12-01T23:59:59.000Z

270

Climatologically Tuned Reflectivity-Rain Rate Relations and Links to Area-Time Integrals  

Science Conference Proceedings (OSTI)

Relations between either the point- or beam-averaged effective reflectivity, Ze, and surface rain rate, R, are determined by a probability matching method similar to that of Calheiros and Zawadzki, and Rosenfeld. The cumulative density functions (...

David Atlas; Daniel Rosenfeld; David B. Wolff

1990-11-01T23:59:59.000Z

271

A Remote-Sensing View of a Freezing-Rain Storm  

Science Conference Proceedings (OSTI)

A destructive freezing-rain storm on 15 February 1990 was observed intensively with advanced ground-based remote sensors and conventional instruments by the Lake Ontario Winter Storms (LOWS) project in upstate New York. A deep layer of warm, ...

Brooks E. Martner; Jack B. Snider; Robert J. Zamora; Gregory P. Byrd; Thomas A. Niziol; Paul I. Joe

1993-09-01T23:59:59.000Z

272

Analyses of 1-min Rain Rates Extracted from Weighing Raingage Recordings  

Science Conference Proceedings (OSTI)

A method for extracting 1-min rain rates from original weighing raingage recordings is described. The method allows the retrieval of rates for long periods at approximately 300 United States weather stations. The process combines magnification of ...

Paul Tattelman; Richard W. Knight

1988-08-01T23:59:59.000Z

273

Monsoon variation and vegetative drought patterns in the Luni Basin in the rain-shadow zone  

Science Conference Proceedings (OSTI)

Drought has a significant impact on agricultural, ecological and socio-economic spheres. Poor and delayed monsoon, high temperature and insufficient water resources lead to recurrent drought in the Luni River basin located in the rain-shadow zone of ...

C. Bhuiyan; F. N. Kogan

2010-04-01T23:59:59.000Z

274

Intercalibrated Passive Microwave Rain Products from the Unified Microwave Ocean Retrieval Algorithm (UMORA)  

Science Conference Proceedings (OSTI)

The Unified Microwave Ocean Retrieval Algorithm (UMORA) simultaneously retrieves sea surface temperature, surface wind speed, columnar water vapor, columnar cloud water, and surface rain rate from a variety of passive microwave radiometers ...

K. A. Hilburn; F. J. Wentz

2008-03-01T23:59:59.000Z

275

Regional and Local Influences on Freezing Drizzle, Freezing Rain,and Ice Pellet Events  

Science Conference Proceedings (OSTI)

Regional and local influences on frequency and type of freezing precipitation (freezing drizzle, freezing rain, and ice pellets) are investigated via in-depth climatologies of six continental United States (CONUS) sounding sites. For each site, ...

Ben C. Bernstein

2000-10-01T23:59:59.000Z

276

Influence of Rain-Rate Initialization, Cloud Microphysics, and Cloud Torques on Hurricane Intensity  

Science Conference Proceedings (OSTI)

This study examines the impact of rain-rate initialization (RINIT), microphysical modifications, and cloud torques (in the context of angular momentum) on hurricane intensity forecasts using a mesoscale model [the Advanced Research Weather ...

S. Pattnaik; C. Inglish; T. N. Krishnamurti

2011-02-01T23:59:59.000Z

277

The Role of Giant and Ultragiant Aerosol Particles in Warm Rain Initiation  

Science Conference Proceedings (OSTI)

Giant and ultragiant aerosol particles can play an important role in warm rain initiation. Recent aerosol measurements have established that particles as large as 100 ?m are a regular part of the atmospheric aerosol. When ingested in growing ...

David B. Johnson

1982-02-01T23:59:59.000Z

278

Model Rain and Clouds over Oceans: Comparison with SSM/I Observations  

Science Conference Proceedings (OSTI)

A comparison of global model cloud and rain parameterization output with satellite observed radiances was carried out. Hydrometeor profiles from ECMWF operational short-range forecasts were combined with a microwave radiative transfer model to ...

Frédéric Chevallier; Peter Bauer

2003-07-01T23:59:59.000Z

279

The Second-Moment Climatology of the GATE Rain Rate Data  

Science Conference Proceedings (OSTI)

The first part of this paper presents the description of the GARP (Global Atmospheric Research Program) Atlantic Tropical Experiment 1 rain-rate data and its two-dimensional spectral and correlation characteristics, which have made it possible to ...

Ilya Polyak; Gerald North

1995-04-01T23:59:59.000Z

280

Satellite and Numerical Model Investigation of Two Heavy Rain Events over the Central Mediterranean  

Science Conference Proceedings (OSTI)

Two heavy rain events over the Central Mediterranean basin, which are markedly different by genesis, dimensions, duration, and intensity, are analyzed. Given the relative low frequency of this type of severe storms in the area, a synoptic analysis ...

Sante Laviola; Agata Moscatello; Mario Marcello Miglietta; Elsa Cattani; Vincenzo Levizzani

2011-08-01T23:59:59.000Z

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

Rain Shedding and Rainwater Runoff Tests on Cast Iron Vented Manhole Covers for Con Edison  

Science Conference Proceedings (OSTI)

This report documents work EPRIsolutions performed for Con Edison that compares water penetration characteristics of two types of vented manhole covers with a solid cover and a manhole with no cover under typical and very heavy rain conditions.

2007-11-21T23:59:59.000Z

282

Probabilistic Parameterizations of Visibility Using Observations of Rain Precipitation Rate, Relative Humidity, and Visibility  

Science Conference Proceedings (OSTI)

This study analyzes the occurrence of the visibility (Vis) versus precipitation rates (PR) for rain and versus relative humidity (RH) from surface observations that were collected during the Fog Remote Sensing and Modeling (FRAM) field project, ...

I. Gultepe; J. A. Milbrandt

2010-01-01T23:59:59.000Z

283

Bayesian Retrieval of Complete Posterior PDFs of Oceanic Rain Rate from Microwave Observations  

Science Conference Proceedings (OSTI)

A new Bayesian algorithm for retrieving surface rain rate from Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) over the ocean is presented, along with validations against estimates from the TRMM Precipitation Radar (PR). The ...

J. Christine Chiu; Grant W. Petty

2006-08-01T23:59:59.000Z

284

Rain Attenuation of Radar Echoes Considering Finite-Range Resolution and Using Drop Size Distributions  

Science Conference Proceedings (OSTI)

The classical rain attenuation correction scheme of Hitschfeld and Bordan (HIBO) and the newer iterative approach by Hildebrand (HL) are reconsidered. Although the motivation for the HL algorithm was an extension into ranges, where HIBO tends to ...

Gerhard Peters; Bernd Fischer; Marco Clemens

2010-05-01T23:59:59.000Z

285

Evaluating Light Rain Drop Size Estimates from Multi-Wavelength Micropulse Lidar Network Profiling  

Science Conference Proceedings (OSTI)

We investigate multi-wavelength retrievals of median equivolumetric drop diameter, D0, suitable for drizzle and light rain, through collocated 355/527 nm Micro Pulse Lidar NETwork (MPLNET) observations collected during precipitation occurring 9 ...

Simone Lolli; Ellsworth J. Welton; James. R. Campbell

286

How Does Rain Affect Surface Pressure in a One-Dimensional Framework?  

Science Conference Proceedings (OSTI)

The process of hydrostatic adjustment in a vertical column is discussed in the context of rain formation and sedimentation. The authors assume an event of instantaneous condensation in a midatmospheric layer that removes mass from the gas phase ...

Thomas Spengler; Joseph Egger; Stephen T. Garner

2011-02-01T23:59:59.000Z

287

Rain-Related Impacts on Selected Transportation Activities and Utility Services in the Chicago Area  

Science Conference Proceedings (OSTI)

An intensive meteorological study of summer precipitation in the Chicago area during 1976–78 furnished detailed data needed to perform a study of the impacts of rain on selected transportation-related activities and on certain utility services. ...

Jan Bertness

1980-05-01T23:59:59.000Z

288

A Climatology of Freezing Rain in the Great Lakes Region of North America  

Science Conference Proceedings (OSTI)

A 15-yr climatology of freezing rain surrounding the Great Lakes region of North America has been constructed using data from rawinsondes, surface stations, and gridded reanalyses from the National Centers for Environmental Prediction. This ...

John Cortinas Jr.

2000-10-01T23:59:59.000Z

289

High-Resolution Imaging of Rain Systems with the Advanced Microwave Precipitation Radiometer  

Science Conference Proceedings (OSTI)

An Advanced Microwave Precipitation Radiometer (AMPR) has been developed and flown in the NASA ER-2 high-altitude aircraft for imaging various atmospheric and surface processes, primarily the internal structure of rain clouds. The AMPR is a ...

Roy W. Spencer; Robbie E. Hood; Frank J. Lafontaine; Eric A. Smith; Robert Platt; Joe Galliano; Vanessa L. Griffin; Elena Lobl

1994-08-01T23:59:59.000Z

290

Can a Descending Rain Curtain in a Supercell Instigate Tornadogenesis Barotropically?  

Science Conference Proceedings (OSTI)

This paper investigates whether the descending rain curtain associated with the hook echo of a supercell can instigate a tornado through a purely barotropic mechanism. A simple numerical model of a mesocyclone is constructed in order to rule out ...

Robert Davies-Jones

2008-08-01T23:59:59.000Z

291

A Numerical Study of the Warm Rain Process in Orographic Clouds  

Science Conference Proceedings (OSTI)

A technique for numerical simulation of a stationary, two-dimensional laminar flow process is described. Based on this technique, a model for warm rain microphysics in an orographic cloud was developed. The model includes condensation, ...

Naihui Song; John Marwitz

1989-11-01T23:59:59.000Z

292

Intrinsic Ambiguities in the Retrieval of Rain Rates from Radar Returns at Attenuating Wavelengths  

Science Conference Proceedings (OSTI)

It is well known that there are significant deterministic ambiguities inherent in trying to determine the particular rain-rate profile that produced some given sequence of air- or spaceborne radar echo powers at a single attenuating frequency. ...

Ziad S. Haddad; Eastwood Im; Stephen L. Durden

1995-12-01T23:59:59.000Z

293

Convective Rain Rates and their Evolution during Storms in a Semiarid Climate  

Science Conference Proceedings (OSTI)

Rain rates and their evolution during summertime convective storms were analyzed for the semiarid climate of the northern High Plains. Radar data from a total of 750 radar echo clusters from the 1980 and 1981 summer cloud seeding operations of ...

AndréA. Doneaud; Stefano Ionescu-Niscov; James R. Miller Jr.

1984-08-01T23:59:59.000Z

294

The Role of Visible Data in Improving Satellite Rain-Rate Estimates  

Science Conference Proceedings (OSTI)

Data from the first Algorithm Intercomparison Project(AIP/1) collected over Japan and surrounding waters in June, July, and August 1989 are used in this study to assess the importance of visible data in satellite rain estimation techniques. The ...

Patrick W. S. King; William D. Hogg; Philip A. Arkin

1995-07-01T23:59:59.000Z

295

Use of Numerical Forecasts for Improving TMI Rain Retrievals over the Mountainous Area in Korea  

Science Conference Proceedings (OSTI)

Topographical influences on the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) rain retrievals over the terrain area of the Korean peninsula were examined using a training dataset constructed from numerical mesoscale model ...

Eun-Han Kwon; Byung-Ju Sohn; Dong-Eon Chang; Myoung-Hwan Ahn; Song Yang

2008-07-01T23:59:59.000Z

296

Rain Retrieval from TMI Brightness Temperature Measurements Using a TRMM PR–Based Database  

Science Conference Proceedings (OSTI)

This study focuses on improving the retrieval of rain from measured microwave brightness temperatures and the capability of the retrieved field to represent the mesoscale structure of a small intense hurricane. For this study, a database is ...

Nicolas Viltard; Corinne Burlaud; Christian D. Kummerow

2006-03-01T23:59:59.000Z

297

Allowance trading activity and state regulatory rulings : evidence from the U.S. Acid Rain Program  

E-Print Network (OSTI)

The U.S. Acid Rain Program is one of the first, and by far the most extensive, applications of a market based approach to pollution control. From the beginning, there has been concern whether utilities would participate ...

Bailey, Elizabeth M.

1996-01-01T23:59:59.000Z

298

Allowance trading activity and state regulatory rulings : evidence from the U.S. Acid Rain Program  

E-Print Network (OSTI)

The U.S. Acid Rain Program is one of the first, and by far the most extensive, applications of a market based approach to pollution control. From the beginning, there has been concern whether utilities would participate ...

Bailey, Elizabeth M.

1998-01-01T23:59:59.000Z

299

Doppler Polarimetric Radar Measurements of the Gamma Drop Size Distribution of Rain  

Science Conference Proceedings (OSTI)

The conversion of radar reflections into rain intensities is dependent upon assumptions regarding the drop size distribution. The gamma drop size distribution contains three unknown parameters; the number of parameters that can be obtained ...

H. W. J. Russchenberg

1993-12-01T23:59:59.000Z

300

Nimbus-7 37 GHz Radiances Correlated with Radar Rain Rates over the Gulf of Mexico  

Science Conference Proceedings (OSTI)

In a comparison between 37 GHz brightness temperatures from the Nimbus 7 Scanning Multichannel Microwave Radiometer and rain rates derived from the WSR-57 radars at Galveston, Texas and Apalachicola, Florida, it was found that the brightness ...

Roy W. Spencer; Barry B. Hinton; William S. Olson

1983-12-01T23:59:59.000Z

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.


301

Correction of Polarimetric Radar Reflectivity Measurements and Rainfall Estimates for Apparent Vertical Profile in Stratiform Rain  

Science Conference Proceedings (OSTI)

A method for correcting the vertical profile of reflectivity measurements and rainfall estimates (VPR) in plan position indicator (PPI) scans of polarimetric weather radars in the melting layer and the snow layer during stratiform rain is ...

John Kalogiros; Marios N. Anagnostou; Emmanouil N. Anagnostou; Mario Montopoli; Errico Picciotti; Frank S. Marzano

2013-05-01T23:59:59.000Z

302

An Automated Synoptic Typing Procedure to Predict Freezing Rain: An Application to Ottawa, Ontario, Canada  

Science Conference Proceedings (OSTI)

Freezing rain is a major weather hazard that can compromise human safety, significantly disrupt transportation, and damage and disrupt built infrastructure such as telecommunication towers and electrical transmission and distribution lines. In ...

Chad Shouquan Cheng; Heather Auld; Guilong Li; Joan Klaassen; Bryan Tugwood; Qian Li

2004-08-01T23:59:59.000Z

303

Synoptic-Scale Analysis of Freezing Rain Events in Montreal, Quebec, Canada  

Science Conference Proceedings (OSTI)

Freezing rain is a major environmental hazard that is especially common along the St. Lawrence River valley (SLRV) in southern Quebec, Canada. For large cities such as Montreal, severe events can have a devastating effect on people, property, and ...

Gina M. Ressler; Shawn M. Milrad; Eyad H. Atallah; John R. Gyakum

2012-04-01T23:59:59.000Z

304

Satellite Cloud Classification and Rain-Rate Estimation Using Multispectral Radiances and Measures of Spatial Texture  

Science Conference Proceedings (OSTI)

Twelve months of Southern Hemisphere (maritime) midlatitudes Advanced Very High Resolution Radiometer local area coverage data at full radiometric and spatial resolution have been collocated with rain-rate data from three Doppler weather radars.

Michael J. Uddstrom; Warren R. Gray

1996-06-01T23:59:59.000Z

305

DS1922/DS1923 Battery Gas Gauge  

E-Print Network (OSTI)

Abstract: Tracking remaining available energy is critical for battery-operated equipment. Energy consumption depends on the temperature and usage history of the product. With temperature loggers, this data is largely a byproduct of normal use. This application note shows how to estimate the energy consumed during a mission and how to use the OneWireViewer to maintain a battery "gas gauge " in the memory of the logger. Motivation—The Need to Know The reliability of portable equipment depends on the status of the energy source. The best equipment cannot function properly with a low battery. For rechargeable batteries as in cell phones, sophisticated battery monitors are now the norm. Is there a way to determine the remaining charge of a conventional battery? In the case of a temperature logger, how can one know whether there is enough power for the next mission? Precondition Batteries lose energy over time through self-discharge (aging) and through normal use when the equipment is switched on. Both the rate of battery self-discharge and the energy consumption of a silicon chip strongly depend on the temperature. The higher the temperature, the higher the energy consumption. If one knows the charge of a fresh battery, the temperature history, and the discharge rate during normal use, one has all the data needed to estimate the battery's remaining charge. The initial battery charge, measured in mAh, is found in battery data sheets. The challenging

unknown authors

2006-01-01T23:59:59.000Z

306

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

307

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).

308

Frontiers of the Gauge Principle and the Unit of Charge  

Science Conference Proceedings (OSTI)

It is shown that the gauge principle (to be traced back to potential difference) displays a new facet as one approaches the Planck-wall: availability of naked alternatives (symbolized as (—) or (—)), (due to "squeezing" by scaleless regime). ...

Anne Magnon

2000-06-01T23:59:59.000Z

309

Window For Higgs Boson Mass From Gauge-Higgs Unification  

E-Print Network (OSTI)

We consider six dimensional gauge models compactified on the orbifold T^2/Z_N (N=2,3,4,6) such that the Standard Model (SM) Higgs doublet arises from the extra-dimensional components of the gauge field. For \\Lambda \\leq 10^{19} GeV, where \\Lambda denotes the compactification scale, we obtain 114.4 GeV \\leq m_H \\leq 164 GeV for the SM Higgs boson mass. We also consider gauge-Higgs-top and gauge-Higgs-bottom Yukawa unification which respectively yield m_H = 131^{+4}_{-5} GeV and m_H = 150^{+2}_{-2} GeV for a top quark pole mass M_t =170.9^{+1.8}_{-1.8} GeV. As a special case we recover the result m_H \\leq 132 GeV previously obtained for five dimensional models.

Ilia Gogoladze; Nobuchika Okada; Qaisar Shafi

2007-08-18T23:59:59.000Z

310

The Higgs boson as a gauge field in extra dimensions  

E-Print Network (OSTI)

I review, at a general non-technical level, the main properties of models in extra dimensions where the Higgs field is identified with some internal component of a gauge field.

Marco Serone

2005-08-01T23:59:59.000Z

311

On relationship of gauge transformation with Wigner's little group  

E-Print Network (OSTI)

Wigner's little group of a massless particle is ISO(2) which contains rotation and two translations. As well-known, eigenvalues of the rotation are helicity. On the other hand, by S. Weinberg et al., it has been shown that two translations generate abelian gauge transformation by acting on polarization vectors. In this paper, we include unphysical modes and show abelian case result can be generalized to the case of non-abelian gauge transformation. By including the unphysical modes, we obtain Nakanishi-Lautrup physical state condition from the requirement of unitarity of the transformation. As a result, non-abelian gauge transformation is realized as the translation of the little group which acts on gauge group. We also obtain similar results for any spacetime dimensions.

Hiroshi Yoda

2012-12-06T23:59:59.000Z

312

Nonintrusive Measurement of Ocean Waves: Lidar Wave Gauge  

Science Conference Proceedings (OSTI)

In December 1999, a nonintrusive directional lidar wave gauge (LWG) was field tested at the Field Research Facility (FRF) in North Carolina. The LWG uses proven lidar technology to directly measure water surface elevation from above the water’s ...

Jennifer L. Irish; Jennifer M. Wozencraft; A. Grant Cunningham; Claudine Giroud

2006-11-01T23:59:59.000Z

313

Load cell having strain gauges of arbitrary location  

DOE Patents (OSTI)

A load cell utilizes a plurality of strain gauges mounted upon the load cell body such that there are six independent load-strain relations. Load is determined by applying the inverse of a load-strain sensitivity matrix to a measured strain vector. The sensitivity matrix is determined by performing a multivariate regression technique on a set of known loads correlated to the resulting strains. Temperature compensation is achieved by configuring the strain gauges as co-located orthogonal pairs.

Spletzer, Barry (Albuquerque, NM)

2007-03-13T23:59:59.000Z

314

Four Fermion Interactions in Non-Abelian Gauge Theory  

E-Print Network (OSTI)

We continue our earlier study of the phase structure of a SU(2) gauge theory whose action contains additional chirally invariant four fermion interactions. Our lattice theory uses a reduced staggered fermion formalism to generate two Dirac flavors in the continuum limit. In the current study we have tried to reduce lattice spacing and taste breaking effects by using an improved fermion action incorporating stout smeared links. As in our earlier study we observe two regimes; for weak gauge coupling the chiral condensate behaves as an order parameter differentiating a phase at small four fermi coupling where the condensate vanishes from a phase at strong four fermi coupling in which chiral symmetry is spontaneously broken. This picture changes qualitatively when the gauge coupling is strong enough to cause confinement; in this case we observe a first order phase transition for some critical value of the four fermi coupling associated with a strong enhancement of the chiral condensate. We observe that this critical four fermi coupling varies monotonically with bare gauge coupling - decreasing, as expected, as the gauge coupling is increased. We have checked that these results remain stable under differing levels of smearing. They appear to rule out the appearance of new fixed points associated with chirally invariant four fermion interactions in confining non abelian gauge theories.

Simon Catterall; Aarti Veernala

2013-03-25T23:59:59.000Z

315

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

316

An Evaluation of the Statistics of Rainfall Extremes in Rain Gauge Observations, and Satellite-Based and Reanalysis Products Using Universal Multifractals  

Science Conference Proceedings (OSTI)

Confidence in the estimation of variations in the frequency of extreme events, and specifically extreme precipitation, in response to climate variability and change is key to the development of adaptation strategies. One challenge to establishing ...

Xiaoming Sun; Ana P. Barros

2010-04-01T23:59:59.000Z

317

Experimental Test of the Effects of Z–R Law Variations on Comparison of WSR-88D Rainfall Amounts with Surface Rain Gauge and Disdrometer Data  

Science Conference Proceedings (OSTI)

Reflectivity factors and rainfall rates found from Level II WSR-88D data for the National Weather Service (NWS) radar in Greer, South Carolina (KGSP), are compared with similar parameters found from disdrometer data collected at the Clemson ...

Carlton W. Ulbrich; Neil E. Miller

2001-06-01T23:59:59.000Z

318

Use of a Rain Gauge Network to Infer the Influence of Environmental Factors on the Propagation of Quasi-Linear Convective Systems in West Africa  

Science Conference Proceedings (OSTI)

The West African squall line is a key quasi-linear storm system that brings much of the precipitation observed in the data-poor Sudanian climate zone. Squall lines propagate at a wide range of speeds and headings, but the lack of operational ...

Jon M. Schrage; Andreas H. Fink

2007-10-01T23:59:59.000Z

319

An Examination of Version-5 Rainfall Estimates from the TRMM Microwave Imager, Precipitation Radar, and Rain Gauges on Global, Regional, and Storm Scales  

Science Conference Proceedings (OSTI)

An evaluation of the version-5 precipitation radar (PR; algorithm 2A25) and Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI; algorithm 2A12) rainfall products is performed across the Tropics in two ways: 1) by comparing long-term ...

Stephen W. Nesbitt; Edward J. Zipser; Christian D. Kummerow

2004-07-01T23:59:59.000Z

320

Modulation of the Diurnal Cycle of Rainfall Associated with the MJO Observed by a Dense Hourly Rain Gauge Network at Sarawak, Borneo  

Science Conference Proceedings (OSTI)

This study investigates spatiotemporal characteristics of the diurnal cycle (DC) of rainfall over Sarawak in northwest Borneo Island, associated with large-scale intraseasonal disturbances represented by the Madden–Julian oscillation (MJO). This ...

Hironari Kanamori; Tetsuzo Yasunari; Koichiro Kuraji

2013-07-01T23:59:59.000Z

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.


321

Vortex operators in gauge field theories  

SciTech Connect

Several related aspects of the 't Hooft vortex operator are studied. The current picture of the vacuum of quantum chromodynamics, the idea of dual field theories, and the idea of the vortex operator are reviewed first. The Abelian vortex operator written in terms of elementary fields and the calculation of its Green's functions are considered. A two-dimensional solvable model of a Dirac string is presented. The expression of the Green's functions more neatly in terms of Wu and Yang's geometrical idea of sections is addressed. The renormalization of the Green's functions of two kinds of Abelian looplike operators, the Wilson loop and the vortex operator, is studied; for both operators only an overall multiplicative renormalization is needed. In the case of the vortex this involves a surprising cancellation. Next, the dependence of the Green's functions of the Wilson and 't Hooft operators on the nature of the vacuum is discussed. The cluster properties of the Green's functions are emphasized. It is seen that the vortex operator in a massive Abelian theory always has surface-like clustering. The form of Green's functions in terms of Feynman graphs is the same in Higgs and symmetric phases; the difference appears in the sum over all tadpole trees. Finally, systems having fields in the fundamental representation are considered. When these fields enter only weakly into the dynamics, a vortex-like operator is anticipated. Any such operator can no longer be local looplike, but must have commutators at long range. A U(1) lattice gauge theory with two matter fields, one singly charged (fundamental) and one doubly charged (adjoint), is examined. When the fundamental field is weakly coupled, the expected phase transitions are found. When it is strongly coupled, the operator still appears to be a good order parameter, a discontinuous change in its behavior leads to a new phase transition. 18 figures.

Polchinski, J.

1980-07-01T23:59:59.000Z

322

Gauge coupling unification in heterotic string models with gauge mediated supersymmetry breaking  

Science Conference Proceedings (OSTI)

We calculate the weak scale minimal supersymmetric standard model spectrum starting from a heterotic string theory compactified on an anisotropic orbifold. Supersymmetry breaking is mediated by vectorlike exotics that arise naturally in heterotic string theories. The messengers that mediate supersymmetry breaking come in incomplete grand unified theory (GUT) multiplets and give rise to nonuniversal gaugino masses at the GUT scale. Models with nonuniversal gaugino masses at the GUT scale have the attractive feature of allowing for precision gauge coupling unification at the GUT scale with negligible contributions from threshold corrections near the unification scale. The unique features of this minimally supersymmetric standard model spectrum are light gluinos and also large mass differences between the lightest and the next-to-lightest neutralinos and charginos which could lead to interesting signatures at the colliders.

Anandakrishnan, Archana; Raby, Stuart [Department of Physics, Ohio State University, 191, W. Woodruff Ave, Columbus, Ohio 43210 (United States)

2011-04-01T23:59:59.000Z

323

Gauge turbulence, topological defect dynamics, and condensation in Higgs models  

E-Print Network (OSTI)

The real-time dynamics of topological defects and turbulent configurations of gauge fields for electric and magnetic confinement are studied numerically within a 2+1D Abelian Higgs model. It is shown that confinement is appearing in such systems equilibrating after a strong initial quench such as the overpopulation of the infrared modes. While the final equilibrium state does not support confinement, metastable vortex defect configurations appear in the gauge field which are found to be closely related to the appearance of physically observable confined electric and magnetic charges. These phenomena are seen to be intimately related to the approach of a non-thermal fixed point of the far-from-equilibrium dynamical evolution, signalled by universal scaling in the gauge-invariant correlation function of the Higgs field. Even when the parameters of the Higgs action do not support condensate formation in the vacuum, during this approach, transient Higgs condensation is observed. We discuss implications of these results for the far-from-equilibrium dynamics of Yang-Mills fields and potential mechanisms how confinement and condensation in non-abelian gauge fields can be understood in terms of the dynamics of Higgs models. These suggest that there is an interesting new class of dynamics of strong coherent turbulent gauge fields with condensates.

Thomas Gasenzer; Larry McLerran; Jan M. Pawlowski; Dénes Sexty

2013-07-19T23:59:59.000Z

324

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,

325

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

326

APRIL 2006 F A LKOVICH ET AL. 591 Rain Initiation Time in Turbulent Warm Clouds  

E-Print Network (OSTI)

A mean field model is presented that describes droplet growth resulting from condensation and collisions and droplet loss resulting from fallout. The model allows for an effective numerical simulation. The numerical scheme that is conservative in water mass and keeps accurate count of the number of droplets is applied, and the way in which the rain initiation time depends on different parameters is studied. In particular, it is shown that the rain initiation time depends nonmonotonically (has a minimum) on the number of cloud condensation nuclei. Also presented is a simple model that allows one to estimate the rain initiation time for turbulent clouds with an inhomogeneous concentration of cloud condensation nuclei. It is argued that by overseeding even a part of a cloud by small hygroscopic nuclei one can substantially delay the onset of precipitation. 1.

Gregory Falkovich; Mikhail; G. Stepanov

2004-01-01T23:59:59.000Z

327

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

328

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

329

Quasilocal Thermodynamics of Dilaton Gravity coupled to Gauge Fields  

E-Print Network (OSTI)

We consider an Einstein-Hilbert-Dilaton action for gravity coupled to various types of Abelian and non-Abelian gauge fields in a spatially finite system. These include Yang-Mills fields and Abelian gauge fields with three and four-form field strengths. We obtain various quasilocal quantities associated with these fields, including their energy and angular momentum, and develop methods for calculating conserved charges when a solution possesses sufficient symmetry. For stationary black holes, we find an expression for the entropy from the micro-canonical form of the action. We also find a form of the first law of black hole thermodynamics for black holes with the gauge fields of the type considered here.

J. Creighton; R. B. Mann

1995-05-05T23:59:59.000Z

330

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

331

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

332

A Quantizable Model of Massive Gauge Vector Bosons without Higgs  

E-Print Network (OSTI)

We incorporate the parameters of the gauge group G into the gauge theory of interactions through a non-linear partial-trace sigma-model Lagrangian on G/H. The minimal coupling of the new (Goldstone-like) scalar bosons provides mass terms to those intermediate vector bosons associated with the quotient G/H, without spoiling gauge invariance, remaining the H-vector potentials massless. The main virtue of a partial trace on G/H, rather than on the entire G, is that we can find an infinite-dimensional symmetry, with non-trivial Noether invariants, which ensures quantum integrability in a non-canonical quantization scheme. The present formalism is explicitly applied to the case G=SU(2)x U(1), as a Higgs-less alternative to the Standard Model of electroweak interactions, although it can also be used in low-energy phenomenological models for strong interactions.

V. Aldaya; M. Calixto; F. F. Lopez-Ruiz

2009-05-22T23:59:59.000Z

333

Remote high temperature insulatorless heat-flux gauge  

DOE Patents (OSTI)

A remote optical heat-flux gauge for use in high temperature environments. 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 light. The luminescence emitted by the two thermographic-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, B.W.

1992-12-31T23:59:59.000Z

334

Patterns of Spontaneous Chiral Symmetry Breaking in Vectorlike Gauge Theories  

E-Print Network (OSTI)

It has been conjectured that spontaneous chiral symmetry breaking in strongly coupled vectorlike gauge theories falls into only three different classes, depending on the gauge group and the representations carried by the fermions. We test this proposal by studying SU(2), SU(3) and SU(4) lattice gauge theories with staggered fermions in different irreducible representations. Staggered fermions away from the continuum limit should, for all complex representations, still belong to the continuum class of spontaneous symmetry breaking. But for all real and pseudo-real representations we show that staggered fermions should belong to incorrect symmetry breaking classes away from the continuum, thus generalizing previous results. As an unambiguous signal for whether chiral symmetry breaks, and which breaking pattern it follows, we look at the smallest Dirac eigenvalue distributions. We find that the patterns of symmetry breaking are precisely those conjectured.

P. H. Damgaard; U. M. Heller; R. Niclasen; B. Svetitsky

2008-01-01T23:59:59.000Z

335

Macroeconomic impacts of clean coal technologies and acid rain legislation: A comparative analysis  

SciTech Connect

In 1987, the National Association of Manufacturers published a study documenting the negative macroeconomic impacts that could occur if proposed acid rain legislation were passed (NAM 1987). These negative impacts would result from the substantially higher electricity rates that would be needed to finance conventional pollution-control retrofits. The US Department of Energy's Office of Fossil Energy (DOE/FE) wanted to evaluate the macroeconomic impacts of nonregulatory approaches to reduce the emissions of acid rain precursors. DOE/FE therefore directed Argonne National Laboratory (ANL) to determine the potential for clean coal technologies (CCTs) to satisfy future electric load growth and achieve greater long-term reductions in emissions at a lower cost than could be achieved through a legislative mandate. This study documents the macroeconomic impacts of CCT deployment without acid rain legislation and compares these results with the corresponding impacts of using conventional technologies and meeting mandatory emission reductions. The Argonne Utility Simulation (ARGUS) model was used to determine the least-cost solution and incremental levelized system costs* over the period 1995-2030 for three scenarios: (1) a baseline scenario, in which no acid rain controls are mandated and no CCTs are deployed; (2) an acid rain (AR) scenario, in which legislation (S. 1894, 100th Congress) is mandated but no CCTs are deployed; and (3) a CCT scenario, in which maximum CCT deployment (specifically, integrated gasification combined-cycle or IGCC technology in repowering and new or greenfield'' applications) occurs but no acid rain legislation is mandated. The Data Resources Inc. (DRI) annual macroeconomic model (which was extended from 2010 to 2030) was used to compute the macroeconomic impacts of the AR and CCT scenarios. 2 refs., 28 figs.

Edwards, B.K.; South, D.W.; Veselka, T.D. (Argonne National Lab., IL (USA). Environmental Assessment and Information Sciences Div.); Gault, N.J. (DRI/McGraw-Hill Energy Service, Lexington, MA (USA))

1989-06-01T23:59:59.000Z

336

Yang-Mills Gauge Conditions from Witten's Open String Field Theory  

E-Print Network (OSTI)

We construct the Zinn-Justin-Batalin-Vilkovisky action for tachyons and gauge bosons from Witten's 3-string vertex of the bosonic open string without gauge fixing. Through canonical transformations, we find the off-shell, local, gauge-covariant action up to 3-point terms, satisfying the usual field theory gauge transformations. Perturbatively, it can be extended to higher-point terms. It also gives a new gauge condition in field theory which corresponds to the Feynman-Siegel gauge on the world-sheet.

Haidong Feng; Warren Siegel

2006-11-28T23:59:59.000Z

337

N=2 supersymmetric gauge theories and quantum integrable systems  

E-Print Network (OSTI)

We study N=2 supersymmetric gauge theories on the product of a two-sphere and a cylinder. We show that the low-energy dynamics of a BPS sector of such a theory is described by a quantum integrable system, with the Planck constant set by the inverse of the radius of the sphere. If the sphere is replaced with a hemisphere, then our system reduces to an integrable system of the type studied by Nekrasov and Shatashvili. In this case we establish a correspondence between the effective prepotential of the gauge theory and the Yang-Yang function of the integrable system.

Yuan Luo; Meng-Chwan Tan; Junya Yagi

2013-10-02T23:59:59.000Z

338

N=2 supersymmetric gauge theories and quantum integrable systems  

E-Print Network (OSTI)

We study N=2 supersymmetric gauge theories on the product of a two-sphere and a cylinder. We show that the low-energy dynamics of a BPS sector of such a theory is described by a quantum integrable system, with the Planck constant set by the inverse of the radius of the sphere. If the sphere is replaced with a hemisphere, then our system reduces to an integrable system of the type studied by Nekrasov and Shatashvili. In this case we establish a correspondence between the effective prepotential of the gauge theory and the Yang-Yang function of the integrable system.

Luo, Yuan; Yagi, Junya

2013-01-01T23:59:59.000Z

339

Unification of gravity, gauge fields, and Higgs bosons  

E-Print Network (OSTI)

We consider a diffeomorphism invariant theory of a gauge field valued in a Lie algebra that breaks spontaneously to the direct sum of the spacetime Lorentz algebra, a Yang-Mills algebra, and their complement. Beginning with a fully gauge invariant action -- an extension of the Plebanski action for general relativity -- we recover the action for gravity, Yang-Mills, and Higgs fields. The low-energy coupling constants, obtained after symmetry breaking, are all functions of the single parameter present in the initial action and the vacuum expectation value of the Higgs.

A. Garrett Lisi; Lee Smolin; Simone Speziale

2010-04-27T23:59:59.000Z

340

A dark matter model with non-Abelian gauge symmetry.  

SciTech Connect

We propose a dark-matter model in which the dark sector is gauged under a new SU(2) group. The dark sector consists of SU(2) dark gauge fields, two triplet dark Higgs fields, and two dark fermion doublets (dark-matter candidates in this model). The dark sector interacts with the standard model sector through kinetic and mass mixing operators. The model explains both PAMELA and Fermi LAT data very well and also satisfies constraints from both the dark-matter relic density and standard model precision observables. The phenomenology of the model at the LHC is also explored.

Zhang, H.; Li, C. S.; Cao, Q.-H.; Li, Z.; High Energy Physics; Univ. of Chicago; Peking Univ.; Michigan State Univ.

2010-10-07T23:59:59.000Z

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.
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341

Gauge theories on hyperbolic spaces and dual wormhole instabilities  

Science Conference Proceedings (OSTI)

We study supergravity duals of strongly coupled four-dimensional gauge theories formulated on compact quotients of hyperbolic spaces. The resulting background geometries are represented by Euclidean wormholes, which complicate establishing the precise gauge theory/string theory correspondence dictionary. These backgrounds suffer from the nonperturbative instabilities arising from the D3D3-bar pair-production in the background four-form potential. We discuss conditions for suppressing this Schwingerlike instability. We find that Euclidean wormholes arising in this construction develop a naked singularity before they can be stabilized.

Buchel, Alex [Department of Applied Mathematics, University of Western Ontario, London, Ontario N6A 5B7 (Canada); Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2J 2W9 (Canada)

2004-09-15T23:59:59.000Z

342

An Approach to Estimate the Areal Rain-Rate Distribution from Spaceborne Radar by the Use of Multiple Thresholds  

Science Conference Proceedings (OSTI)

Estimates of rain rate derived from a spaceborne weather radar will be most reliable over an intermediate range of values. At light or heavy rain rates, where the signal-to-noise ratios are degraded either by small values of the backscattered ...

R. Meneghini; J. A. Jones

1993-02-01T23:59:59.000Z

343

Validation of the Rain Profiling Algorithm “ZPHI” from the C-Band Polarimetric Weather Radar in Darwin  

Science Conference Proceedings (OSTI)

An extensive application of a rain profiling algorithm (ZPHI) employing a C-band polarimetric radar (the C-POL radar of the Australian Bureau of Meteorology Research Centre in Darwin) is presented. ZPHI belongs to the class of rain profiling ...

Erwan Le Bouar; Jacques Testud; Tom D. Keenan

2001-11-01T23:59:59.000Z

344

Duality transformation of non-Abelian tensor gauge fields  

E-Print Network (OSTI)

For non-Abelian tensor gauge fields we have found an alternative form of duality transformation, which has the property that the direct and the inverse transformations coincide. This duality transformation has the desired property that the direct and the inverse transformations map Lagrangian forms into each other.

Sebastian Guttenberg; George Savvidy

2008-01-16T23:59:59.000Z

345

A comparison of collider searches for new gauge bosons  

SciTech Connect

We compare and contrast the search capabilities during the next decade of e{sup +}e{sup {minus}}, ep, and {bar p}p colliders for new neutral gauge bosons in several extended versions of the Standard Model. 7 refs., 3 figs., 1 tab.

Hewett, J.L. (Wisconsin Univ., Madison, WI (USA). Dept. of Physics); Rizzo, T.G. (Wisconsin Univ., Madison, WI (USA). Dept. of Physics Iowa State Univ. of Science and Technology, Ames, IA (USA))

1990-01-01T23:59:59.000Z

346

The Van de Casteele Test Revisited: An Efficient Approach to Tide Gauge Error Characterization  

Science Conference Proceedings (OSTI)

The classical question of metrology related to the quality of the tide gauge measurements has become more important this last decade or so as new technologies have emerged and tide gauge networks are modernized. The Global Sea Level Observing ...

Belen Martin Miguez; Laurent Testut; Guy Wöppelmann

2008-07-01T23:59:59.000Z

347

Estimation of Wind-Induced Error of Rainfall Gauge Measurements Using a Numerical Simulation  

Science Conference Proceedings (OSTI)

A new method of estimating the wind-induced error of rainfall gauge measurements is presented. The method is based on a three-dimensional numerical simulation of the airflow around a precipitation gauge and subsequent computation of particle ...

Vladislav Nešpor; Boris Sevruk

1999-04-01T23:59:59.000Z

348

Torrential Rains on the Spanish Mediterranean Coast: Modeling the Effects of the Sea Surface Temperature  

Science Conference Proceedings (OSTI)

Torrential rains are a frequent meteorological risk in the Mediterranean Basin, and the work reported here is part of a long-term study that includes the analysis of the synoptic conditions involved in their genesis. This paper studies the role ...

Francisco Pastor; MarÍa J. Estrela; David Peñarrocha; Millán M. Millán

2001-07-01T23:59:59.000Z

349

Dynamics and Prediction of a Mesoscale Extreme Rain Event in the Baiu Front over Kyushu, Japan  

Science Conference Proceedings (OSTI)

A high-resolution version of the limited-area primitive equations model of the Bureau of Meteorology Research Centre is used to investigate the dynamics and prediction of the mesoscale, extreme rain event of 1 August 1993 over Kyushu. The model ...

Noel E. Davidson; Kazuo Kurihara; Teruyuki Kato; Graham Mills; Kamal Puri

1998-06-01T23:59:59.000Z

350

The Heavy Rain Event of 29 October 2000 in Hana, Maui  

Science Conference Proceedings (OSTI)

On 29 October 2000, the Hana region of Maui received 700 mm of rain in 7 h. Radar analyses revealed that the storm consisted of seven cells that were initiated along the southeast slope of Haleakala volcano. One of these cells survived for nearly ...

Ryan E. Lyman; Thomas A. Schroeder; Gary M. Barnes

2005-08-01T23:59:59.000Z

351

Measurements of the Transmission Loss of a Radome at Different Rain Intensities  

Science Conference Proceedings (OSTI)

Results on the transmission loss of a dry and a wet C-band weather radar radome at different rain intensities are presented. Two methods were used in the study, both carried out under laboratory conditions. In the first method, the complex ...

Mikko Kurri; Asko Huuskonen

2008-09-01T23:59:59.000Z

352

Organization and Environmental Properties of Extreme-Rain-Producing Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

This study examines the radar-indicated structures and other features of extreme rain events in the United States over a 3-yr period. A rainfall event is defined as “extreme” when the 24-h precipitation total at one or more stations surpasses the ...

Russ S. Schumacher; Richard H. Johnson

2005-04-01T23:59:59.000Z

353

Comparison of Bulk and Bin Warm-Rain Microphysics Models Using a Kinematic Framework  

Science Conference Proceedings (OSTI)

This paper discusses the development and testing of a bulk warm-rain microphysics model that is capable of addressing the impact of atmospheric aerosols on ice-free clouds. Similarly to previous two-moment bulk schemes, this model predicts the ...

Hugh Morrison; Wojciech W. Grabowski

2007-08-01T23:59:59.000Z

354

Long-Lasting Trade-Wind Rain Showers in a Three-Dimensional Model  

Science Conference Proceedings (OSTI)

A three-dimensional warm rain model that included microphysics was used to study the reasons for ease of rainfall in Hawaiian clouds and the long-lasting rainfall from certain rainbands. It was found that drop recirculation occurs within these ...

Tsutomu Takahashi

1988-11-01T23:59:59.000Z

355

Local and Synoptic Environments Associated with Freezing Rain in the Contiguous United States  

Science Conference Proceedings (OSTI)

Local and synoptic conditions associated with freezing-rain events in the continental United States, as well as the temporal and spatial variability of these conditions, have been documented for the period 1976–90. It had been postulated that the ...

Chris C. Robbins; John V. Cortinas Jr.

2002-02-01T23:59:59.000Z

356

The Ground-Truth Problem for Satellite Estimates of Rain Rate  

Science Conference Proceedings (OSTI)

In this paper a scheme is proposed to use a point raingage to compare contemporaneous measurements of rain rate from a single-field-of-view estimate based on a satellite remote sensor such as a microwave radiometer. Even in the ideal case the ...

Gerald R. North; Juan B. Valdés; Eunho Ha; Samuel S. P. Shen

1994-08-01T23:59:59.000Z

357

Measurements of 7Be and 210Pb in Rain, Snow, and Hail  

Science Conference Proceedings (OSTI)

Measurements of the levels of 7Be and 210Pb are reported for rain, snow, and hail samples taken at Argonne, Illinois, and Socorro, New Mexico. These natural radioisotopes are indicators of the sources of the aerosols contributing materials to the ...

Jeffrey S. Gaffney; Kent A. Orlandini; Nancy A. Marley; Carl J. Popp

1994-07-01T23:59:59.000Z

358

Climatology of Heavy Rain Events in the United States from Hourly Precipitation Observations  

Science Conference Proceedings (OSTI)

Flash flooding is frequently associated with heavy precipitation (defined here as ?1 in. h?1) occurring over a short period of time. To begin a study of flash flood–producing rain events, the Hourly Precipitation Dataset (HPD) is used to develop ...

Harold E. Brooks; David J. Stensrud

2000-04-01T23:59:59.000Z

359

Heavy Rains and Flooding in Montana: A Case for Operational Use of Symmetric Instability Diagnosis  

Science Conference Proceedings (OSTI)

A strongly developing cyclone east of the Rockies moved northward along the Montana/North Dakota border between 24–26 September 1986 and deposited over 1 in. of rain throughout much of eastern Montana. Included in this area of precipitation was ...

Glenn R. Lussky

1989-06-01T23:59:59.000Z

360

Study of a Heavy Rain Vortex Formed over the Eastern Flank of the Tibetan Plateau  

Science Conference Proceedings (OSTI)

A case of the heavy rain vortex which occurred during the period 14–15 July 1979 is studied using a limited-area mesoscale numerical model. This is a representative example of a group of warm southwest vortices that often form over the eastern ...

Bin Wang; Isidoro Orlanski

1987-07-01T23:59:59.000Z

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.


361

Soil Thermal and Ecological Impacts of Rain on Snow Events in the Circumpolar Arctic  

Science Conference Proceedings (OSTI)

Rain on snow (ROS) events are rare in most parts of the circumpolar Arctic, but have been shown to have great impact on soil surface temperatures and serve as triggers for avalanches in the midlatitudes, and they have been implicated in ...

Kevin J. Rennert; Gerard Roe; Jaakko Putkonen; Cecilia M. Bitz

2009-05-01T23:59:59.000Z

362

The combined effect of rain and wind on airwater gas exchange: A feasibility study  

E-Print Network (OSTI)

rights reserved. 1. Introduction Air­water gas exchange is an important process on local, regional, and cycling of biogeochemically important trace gases. Gas exchange for slightly soluble gases is thought of the reduction. In order to examine the systematic effects of rain and wind on gas exchange in the natural

Ho, David

363

Synoptic and Mesoscale Structure of a Severe Freezing Rain Event: The St. Valentine's Day Ice Storm  

Science Conference Proceedings (OSTI)

A severe freezing rainstorm produced as much as 4.5 cm of freezing rain during an 18-h period at Champaign, Illinois, on 14–15 February 1990, resulting in over $12 million in damage, week-long power outages, and a federal disaster declaration. ...

Robert M. Rauber; Mohan K. Ramamurthy; Ali Tokay

1994-06-01T23:59:59.000Z

364

Analysis of Video Disdrometer and Polarimetric Radar Data to Characterize Rain Microphysics in Oklahoma  

Science Conference Proceedings (OSTI)

In this paper, data from three 2-dimensional video disdrometers (2DVDs) and an S-band polarimetric radar are used to characterize rain microphysics in Oklahoma. Sampling errors from the 2DVD measurements are quantified through side-by-side ...

Qing Cao; Guifu Zhang; Edward Brandes; Terry Schuur; Alexander Ryzhkov; Kyoko Ikeda

2008-08-01T23:59:59.000Z

365

Proposal for a Spaceborne Dual-Beam Rain Radar with Doppler Capability  

Science Conference Proceedings (OSTI)

The potential characteristics and performances of a spaceborne dual-beam radar (or stereo radar) operating at 24 GHz, and devoted primarily to the retrieval of rain-rate structure by using the stereo-radar analysis, were presented in a previous ...

Paul Amayenc; Jacques Testud; Mongi Marzoug

1993-06-01T23:59:59.000Z

366

The Yang-Mills theory as a massless limit of a massive nonabelian gauge model  

E-Print Network (OSTI)

A gauge invariant infrared regularization of the Yang-Mills theory applicable beyond perturbation theory is constructed.

A. A. Slavnov

2012-12-13T23:59:59.000Z

367

All-order Finiteness of the Higgs Boson Mass in the Dynamical Gauge-Higgs Unification  

E-Print Network (OSTI)

In the dynamical gauge-Higgs unification, it is shown that the mass of the Higgs boson (4D scalar field) in U(1) gauge theory in $M^4 \\times T^n$ ($n=1,2,3,...$) is finite to all order in perturbation theory as a consequence of the large gauge invariance. It is conjectured that the Higgs boson mass is finite in non-Abelian gauge theory in $M^4 \\times S^1$, $M^4 \\times (S^1/Z_2)$ and the Randall-Sundrum warped spacetime to all order in the rearranged perturbation theory where the large gauge invariance is maintained.

Yutaka Hosotani

2006-07-06T23:59:59.000Z

368

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

369

Systematic gauge-invariant approach to heavy quarkonium decays  

Science Conference Proceedings (OSTI)

We present a method which, starting directly from QCD, permits a systematic gauge-invariant expansion to be made for all hard processes involving quarkonia in powers of the quark relative velocity, a small natural parameter for heavy quark systems. Our treatment automatically introduces soft gluons in the expansion. Corrections arising from the incorporation of gauge symmetry turn out to be important for decay and fragmentation processes involving {ital Q{bar Q}} systems. The contribution of soft gluons is shown to be of higher order in {ital v} and so is neglected for calculations done up to and including {ital O}({ital v}{sup 2}). {copyright} {ital 1996 The American Physical Society.}

Khan, H. [Department of Physics, Quaid-e-Azam University, Islamabad (Pakistan)] [Department of Physics, Quaid-e-Azam University, Islamabad (Pakistan); Hoodbhoy, P. [Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)] [Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); [Department of Physics, Quaid-e-Azam University, Islamabad (Pakistan)

1996-03-01T23:59:59.000Z

370

N >= 4 Supergravity Amplitudes from Gauge Theory at Two Loops  

SciTech Connect

We present the full two-loop four-graviton amplitudes in N = 4, 5, 6 supergravity. These results were obtained using the double-copy structure of gravity, which follows from the recently conjectured color-kinematics duality in gauge theory. The two-loop four-gluon scattering amplitudes in N = 0, 1, 2 supersymmetric gauge theory are a second essential ingredient. The gravity amplitudes have the expected infrared behavior: the two-loop divergences are given in terms of the squares of the corresponding one-loop amplitudes. The finite remainders are presented in a compact form. The finite remainder for N = 8 supergravity is also presented, in a form that utilizes a pure function with a very simple symbol.

Boucher-Veronneau, C.; Dixon, L.J.; /SLAC

2012-02-15T23:59:59.000Z

371

Superconducting Circuits for Quantum Simulation of Dynamical Gauge Fields  

E-Print Network (OSTI)

We describe a superconducting-circuit lattice design for the implementation and simulation of dynamical lattice gauge theories. We illustrate our proposal by analyzing a one-dimensional U(1) quantum-link model, where superconducting qubits play the role of matter fields on the lattice sites and the gauge fields are represented by two coupled microwave resonators on each link between neighboring sites. A detailed analysis of a minimal experimental protocol for probing the physics related to string breaking effects shows that despite the presence of decoherence in these systems, distinctive phenomena from condensed-matter and high-energy physics can be visualized with state-of-the-art technology in small superconducting-circuit arrays.

D. Marcos; P. Rabl; E. Rico; P. Zoller

2013-06-07T23:59:59.000Z

372

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

373

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

374

Over-populated gauge fields on the lattice  

E-Print Network (OSTI)

We study nonequilibrium dynamics of SU(2) pure gauge theory starting from initial over-population, where intense classical gauge fields are characterized by a single momentum scale Q_s. Classical-statistical lattice simulations indicate a quick evolution towards an approximate scaling behavior with exponent 3/2 at intermediate times. Remarkably, the value for the scaling exponent may be understood as arising from the leading O(g^2) contribution in the presence of a time-dependent background field. The phenomenon is associated to weak wave turbulence describing an energy cascade towards higher momenta. This particular aspect is very similar to what is observed for scalar theories, where an effective cubic interaction arises because of the presence of a time-dependent Bose condensate.

J. Berges; S. Schlichting; D. Sexty

2012-03-21T23:59:59.000Z

375

Just Renormalizable TGFT's on $U(1)^{d}$ with Gauge Invariance  

E-Print Network (OSTI)

We study the polynomial Abelian or $U(1)^d$ Tensorial Group Field Theories equipped with a gauge invariance condition in any dimension $d$. From our analysis, we prove the just renormalizability at all orders of perturbation of the $\\vp^4_6$ and $\\vp^6_5$ random tensor models. We also deduce that the $\\vp^4_5$ tensor model is super-renormalizable.

Samary, Dine Ousmane

2012-01-01T23:59:59.000Z

376

CFT fusion rules, DHR gauge groups, and CAR algebras  

E-Print Network (OSTI)

It is demonstrated that several series of conformal field theories, while satisfying braid group statistics, can still be described in the conventional setting of the DHR theory, i.e. their superselection structure can be understood in terms of a compact DHR gauge group. Besides theories with only simple sectors, these include (the untwisted part of) c=1 orbifold theories and level two so(N) WZW theories. We also analyze the relation between these models and theories of complex free fermions.

J. B"ockenhauer; J. Fuchs

1997-05-07T23:59:59.000Z

377

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

378

Lattice gaugefixing and other optics in lattice gauge theory  

Science Conference Proceedings (OSTI)

We present results from four projects. In the first, quark and gluon propagators and effective masses and {Delta}I = 1/2 Rule operator matching coefficients are computed numerically in gaugefixed lattice QCD. In the second, the same quantities are evaluated analytically in the strong coupling, N {yields} {infinity} limit. In the third project, the Schwinger model is studied in covariant gauges, where we show that the effective electron mass varies with the gauge parameter and that longitudinal gaugefixing ambiguities affect operator product expansion coefficients (analogous to {Delta}I = 1/2 Rule matching coefficients) determined by matching gauge variant matrix elements. However, we find that matching coefficients even if shifted by the unphysical modes are {xi} invariant. In the fourth project, we show that the strong coupling parallelogram lattice Schwinger model as a different thermodynamic limit than the weak coupling continuum limit. As a function of lattice skewness angle these models span the {Delta} = {minus}1 critical line of 6-vertex models which, in turn, have been identified as c = 1 conformal field theories.

Yee, Ken.

1992-06-01T23:59:59.000Z

379

Further Experiments on the Effect of Tropical Atlantic Heating Anomalies upon GCM Rain Forecasts over the Americas  

Science Conference Proceedings (OSTI)

A series of real-data experiments is performed with a general circulation model to study the sensitivity of extended range rain forecasts over the Americas to the structure and magnitude of tropical beating anomalies. The emphasis is upon heat ...

Julio Buchmann; Lawrence E. Buja; Jan Paegle; Robert E. Dickinson

1995-05-01T23:59:59.000Z

380

Correction of the High-Latitude Rain Day Anomaly in the NCEP–NCAR Reanalysis for Land Surface Hydrological Modeling  

Science Conference Proceedings (OSTI)

A spurious wavelike pattern in the monthly rain day statistics exists within the National Centers for Environmental Prediction–National Center for Atmospheric Research (NCEP–NCAR) reanalysis precipitation product. The anomaly, which is an ...

Justin Sheffield; Alan D. Ziegler; Eric F. Wood; Yangbo Chen

2004-10-01T23:59:59.000Z

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.


381

Correction of Drop Shape-Induced Errors on Rain Rates Derived from Radar-Measured Doppler Spectra at Vertical Incidence  

Science Conference Proceedings (OSTI)

The shape of larger raindrops shows a deviation from spheres. This leads to a radar backscatter cross section different from the Rayleigh cross section. The drop shape-induced error for deducing rain rates is calculated. The resulting correction ...

Dirk Klugmann; Carolin Richter

1995-06-01T23:59:59.000Z

382

A Robust Error-Based Rain Estimation Method for Polarimetric Radar. Part I: Development of a Method  

Science Conference Proceedings (OSTI)

The algorithms used to estimate rainfall from polarimetric radar variables show significant variance in error characteristics over the range of naturally occurring rain rates. As a consequence, to improve rainfall estimation accuracy using ...

Acacia S. Pepler; Peter T. May; Merhala Thurai

2011-10-01T23:59:59.000Z

383

Diagnosis of the Warm Rain Process in Cloud-Resolving Models Using Joint CloudSat and MODIS Observations  

Science Conference Proceedings (OSTI)

This study examines the warm rain formation process in global and regional cloud-resolving models. Methodologies developed to analyze CloudSat and Moderate Resolution Imaging Spectroradiometer (MODIS) satellite observations are employed to ...

Kentaroh Suzuki; Graeme L. Stephens; Susan C. van den Heever; Takashi Y. Nakajima

2011-11-01T23:59:59.000Z

384

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

Science Conference Proceedings (OSTI)

It has been well known for years that the heavy rain and flooding of tropical cyclones over land bear a weak relationship to the maximum wind intensity. The rainfall accumulation history and rainfall potential history of two North Atlantic ...

Haiyan Jiang; Jeffrey B. Halverson; Joanne Simpson

2008-02-01T23:59:59.000Z

385

Intercomparison of Single-Frequency Methods for Retrieving a Vertical Rain Profile from Airborne or Spaceborne Radar Data  

Science Conference Proceedings (OSTI)

This paper briefly reviews several single-frequency rain profiling methods for an airborne or spaceborne radar. The authors describe the different methods from a unified point of view starting from the basic differential equation. This ...

Toshio Iguchi; Robert Meneghini

1994-12-01T23:59:59.000Z

386

A Comparison of Gamma and Lognormal Distributions for Characterizing Satellite Rain Rates from the Tropical Rainfall Measuring Mission  

Science Conference Proceedings (OSTI)

This study investigates the spatial characteristics of nonzero rain rates to develop a probability density function (PDF) model of precipitation using rainfall data from the Tropical Rainfall Measuring Mission (TRMM) satellite. The minimum ?2 ...

Hye-Kyung Cho; Kenneth P. Bowman; Gerald R. North

2004-11-01T23:59:59.000Z

387

The Improved AMSU Rain-Rate Algorithm and Its Evaluation for a Cool Season Event in the Western United States  

Science Conference Proceedings (OSTI)

Rain-rate retrievals from passive microwave sensors are useful for a number of applications related to weather forecasting. For example, in the United States, such estimates are useful for offshore rainfall systems approaching land and in regions ...

Shuang Qiu; Paul Pellegrino; Ralph Ferraro; Limin Zhao

2005-10-01T23:59:59.000Z

388

Application of an Apple-II Computer in Real-Time Data Processing of Microwave Radiation Attenuation by Rain  

Science Conference Proceedings (OSTI)

Using an Apple-II microcomputer, real-time data acquisition, processing, staring and display of 12 GHz microwave radiation attenuation by rain have been implemented. The computer-radiometer interface consists of an address decoder, two three-...

Song Qian

1989-02-01T23:59:59.000Z

389

An Observational Study of the Relationship between Excessively Strong Short Rains in Coastal East Africa and Indian Ocean SST  

Science Conference Proceedings (OSTI)

Composites of SST, wind, rainfall, and humidity have been constructed for years of high rainfall during September, October, and November (SON) in equatorial and southern-central East Africa. These show that extreme East African short rains are ...

Emily Black; Julia Slingo; Kenneth R. Sperber

2003-01-01T23:59:59.000Z

390

Relationships between Radar Properties at High Elevations and Surface Rain Rate: Potential Use for Spaceborne Rainfall Measurements  

Science Conference Proceedings (OSTI)

Ground-based radar data have been used to investigate the relationship between reflectivity at high elevations and surface rain rates. Such relations are useful for rainfall measurements by spaceborne radars at attenuating wavelength such as the ...

Eyal Amitai

1999-03-01T23:59:59.000Z

391

Characteristics of the Vertical Profiles of Dual-Frequency, Dual-Polarization Radar Data in Stratiform Rain  

Science Conference Proceedings (OSTI)

Airborne dual-wavelength and dual-polarization radar data are analyzed for measurements taken in stratiform rain in the western Pacific during September 1990. The focus of the paper is on the vertical profiles of the linear depolarization ratio, ...

R. Meneghini; H. Kumagai

1994-06-01T23:59:59.000Z

392

Characteristic Features of Warm-Type Rain Producing Heavy Rainfall over the Korean Peninsula Inferred from TRMM Measurements  

Science Conference Proceedings (OSTI)

In contrast to the view that deep convection causes heavy rainfall, Tropical Rainfall Measuring Mission (TRMM) measurements demonstrate that heavy rainfall (ranging from moderate to extreme rain rate) over the Korean peninsula is associated more ...

B. J. Sohn; Geun-Hyeok Ryu; Hwan-Jin Song; Mi-Lim Ou

2013-11-01T23:59:59.000Z

393

Numerical Simulation of a Rain Shower Affected by Waste Energy Released from a Cooling Tower Complex in a Calm Environment  

Science Conference Proceedings (OSTI)

An axisymmetric cloud model is used to investigate the evolution of convective cells and associated rain showers that develop due to the sensible and latent heat released into a calm atmosphere from an industrial cooling complex. The simulated ...

S. Guan; G. W. Reuter

1995-01-01T23:59:59.000Z

394

CPOL Radar-Derived Drop Size Distribution Statistics of Stratiform and Convective Rain for Two Regimes in Darwin, Australia  

Science Conference Proceedings (OSTI)

This note builds on prior technique development related to the classification of rain types utilizing C-band polarimetric (CPOL) radar measurements. While the prior work was preliminary and limited in scope, the authors elaborate here on the ...

M. Thurai; V. N. Bringi; P. T. May

2010-05-01T23:59:59.000Z

395

An Analysis of Freezing Rain, Freezing Drizzle, and Ice Pellets across the United States and Canada: 1976–90  

Science Conference Proceedings (OSTI)

A comprehensive analysis of freezing rain, freezing drizzle, and ice pellets was conducted using data from surface observations across the United States and Canada. This study complements other studies of freezing precipitation in the United ...

John V. Cortinas Jr.Ben C. Bernstein; Christopher C. Robbins; J. Walter Strapp

2004-04-01T23:59:59.000Z

396

Characteristic features of warm-type rain producing heavy rainfall over the Korean peninsula inferred from TRMM measurements  

Science Conference Proceedings (OSTI)

In contrast to the view that deep convection causes the heavy rainfall, Tropical Rainfall Measuring Mission (TRMM) measurements demonstrate that heavy rainfall (ranging from moderate to extreme rain rate) over the Korean peninsula is associated ...

B.J. Sohn; Geun-Hyeok Ryu; Hwan-Jin Song; Mi-Lim Ou

397

Voluntary compliance with market-based environment poliy [sic] : evidence from the U.S. acid rain program  

E-Print Network (OSTI)

The U.S. acid rain program, Title IV of the 1990 Clean Air Act Amendments, is a pioneering experience in environmental regulation by setting a market for electric utility emissions of sulfur dioxide (SO2) and by including ...

Montero, Juan Pablo

398

Electric Utility Phase I Acid Rain Compliance Strategies for the Clean Air Act Amendments of 1990  

Reports and Publications (EIA)

The Acid Rain Program is divided into two time periods; Phase I, from 1995 through 1999, and Phase II, starting in 2000. Phase I mostly affects power plants that are the largest sources of SO2 and NOx . Phase II affects virtually all electric power producers, including utilities and nonutilities. This report is a study of the effects of compliance with Phase I regulations on the costs and operations of electric utilities, but does not address any Phase II impacts.

Information Center

1994-03-01T23:59:59.000Z

399

Restriction Condition of Gauge Transformation that Motion Equation of non-Abelian Gauge Field Must satisfy and Elimination of Higgs Mechanism  

E-Print Network (OSTI)

In the current theory of non-Abelian gauge field, we only claim the invariability of Lagrangian, without claim the invariability of the motion equation. This is inconsistent and irrational. It is proved that a restriction relation between gauge potentials and group parameters must be satisfied in order to ensure the gauge invariability of the motion equation of non-Abelian gauge field, and the restriction relation is equivalent to the Faddeev--Popov theory. The result leads to that the completely local gauge invariability is violated but there still exists the incompletely local gauge invariability. After the restriction relation is considered, the mass item of the non-Abelian gauge fields can be added into the Lagrangian and motion equation directly without violating gauge invariability. The corresponding W,T identity is obtained and the theory is still renormalizable. In this way, the Higgs mechanism becomes unnecessary. It means that we can reach a coincident theory without the hypothesis of the Higgs particles again. The description of the stander theory of particle physics can also be simplified greatly and the problem of CP violation in strong interaction can also be solved thoroughly.

Mei Xiaochun

2000-04-13T23:59:59.000Z

400

Rain water transport and storage in a model sandy soil with hydrogel particle additives  

E-Print Network (OSTI)

We study rain water infiltration and drainage in a dry model sandy soil with superabsorbent hydrogel particle additives by measuring the mass of retained water for non-ponding rainfall using a self-built 3D laboratory set-up. In the pure model sandy soil, the retained water curve measurements indicate that instead of a stable horizontal wetting front that grows downward uniformly, a narrow fingered flow forms under the top layer of water-saturated soil. This rain water channelization phenomenon not only further reduces the available rain water in the plant root zone, but also affects the efficiency of soil additives, such as superabsorbent hydrogel particles. Our studies show that the shape of the retained water curve for a soil packing with hydrogel particle additives strongly depends on the location and the concentration of the hydrogel particles in the model sandy soil. By carefully choosing the particle size and distribution methods, we may use the swollen hydrogel particles to modify the soil pore structure, to clog or extend the water channels in sandy soils, or to build water reservoirs in the plant root zone.

Y. Wei; D. J. Durian

2013-10-23T23:59:59.000Z

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

Evaluation of Some Ground Truth Designs for Satellite Estimates of Rain Rate  

Science Conference Proceedings (OSTI)

In this paper point gauge measurements are analyzed as part of a ground truth design to validate satellite retrieval algorithms at the field-of-view spatial level (typically about 20 km). Even in the ideal case the ground and satellite ...

Eunho Ha; Gerald R. North; Chulsang Yoo; Kyung-Ja Ha

2002-01-01T23:59:59.000Z

402

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

403

New Results in Topological Field Theory and Abelian Gauge Theory  

E-Print Network (OSTI)

These are the lecture notes of a set of lectures delivered at the 1995 Trieste summer school in June. I review some recent work on duality in four dimensional Maxwell theory on arbitrary four manifolds, as well as a new set of topological invariants known as the Seiberg-Witten invariants. Much of the necessary background material is given, including a crash course in topological field theory, cohomology of manifolds, topological gauge theory and the rudiments of four manifold theory. My main hope is to wet the readers appetite, so that he or she will wish to read the original works and perhaps to enter this field.

George Thompson

1995-11-06T23:59:59.000Z

404

Exact Solutions of the Abelian Decomposed Restricted Gauge Potential  

Science Conference Proceedings (OSTI)

We construct new exact solution of the SU(2) Yang-Mills-Higgs model by considering Abelian decomposition of the gauge potential. The solution is obtained by considering only the restricted part of the decomposition, where the unrestricted valence part is switched off. The solutions possess free parameters c{sub 1}, c{sub 2} and q that correspond to different physical system of monopoles. Under the limit of c{sub 1} = 0, c{sub 2} = 1, and q = 1, the solution is that of the Wu-Yang-like monopole.

Wong, Khai-Ming; Teh, Rosy; Koh, Pin-Wai [School of Physics, Universiti Sains Malaysia, 11800 USM, Penang (Malaysia)

2011-03-30T23:59:59.000Z

405

Heavy quarks, gluons and the confinement potential in Coulomb gauge  

SciTech Connect

We consider the heavy quark limit of Coulomb gauge QCD, with the truncation of the Yang-Mills sector to include only (dressed) two-point functions. We find that the rainbow-ladder approximation to the gap and Bethe-Salpeter equations is nonperturbatively exact and moreover, we provide a direct connection between the temporal gluon propagator and the quark confinement potential. Further, we show that only bound states of color singlet quark-antiquark (meson) and quark-quark (SU(2) baryon) pairs are physically allowed.

Popovici, Carina; Watson, Peter; Reinhardt, Hugo [Institut fuer Theoretische Physik, Universitaet Tuebingen, Auf der Morgenstelle 14, D-72076 Tuebingen (Germany)

2011-05-23T23:59:59.000Z

406

Integral equation for gauge invariant quark Green's function  

E-Print Network (OSTI)

We consider gauge invariant quark two-point Green's functions in which the gluonic phase factor follows a skew-polygonal line. Using a particular representation for the quark propagator in the presence of an external gluon field, functional relations between Green's functions with different numbers of segments of the polygonal lines are established. An integral equation is obtained for the Green's function having a phase factor along a single straight line. The related kernels involve Wilson loops with skew-polygonal contours and with functional derivatives along the sides of the contours.

H. Sazdjian

2008-06-20T23:59:59.000Z

407

Spin Hall effects for cold atoms in a light induced gauge potential  

SciTech Connect

We propose an experimental scheme to observe spin Hall effects with cold atoms in a light induced gauge potential. Under an appropriate configuration, the cold atoms moving in a spatially varying laser field experience an effective spin-dependent gauge potential. Through numerical simulation, we demonstrate that such a gauge field leads to observable spin Hall currents under realistic conditions. We also discuss the quantum spin Hall state in an optical lattice.

Zhu, Shi-Liang; /Michigan U., MCTP /South China Normal U.; Fu, Hao; /Michigan U., MCTP; Wu, C.-J.; /Santa Barbara, KITP; Zhang, S.-C.; /Stanford U., Phys. Dept.; Duan, L.-M. /Michigan U., MCTP

2010-03-16T23:59:59.000Z

408

On the covariant gauge {alpha} of the linearized gravity in de Sitter spacetime  

SciTech Connect

In previous work, we studied the linearized gravity with covariant gauge {beta}= 2/3 and {alpha}= 5/3. It was found that the sum of the source and initial contributions reproduces the correct field configuration over the whole de Sitter spacetime. In this paper, we extend this work to generalizing the linearized gravitational field in an arbitrary value of the gauge parameter {alpha} but the gauge parameter {beta} remains the same.

Cheong, Lee Yen [Department of Fundamental and Applied Science Universiti Teknologi Petronas, Bandar Seri Iskandar, 31750 Tronoh, Perak (Malaysia)

2012-09-26T23:59:59.000Z

409

Lectures on the gauge/string duality with emphasis on spectroscopy  

Science Conference Proceedings (OSTI)

I review recent progress on the connection between string theory and quantum chromo-dynamics in the context of the gauge/string duality. Emphasis is placed on conciseness and conceptual aspects rather than on technical details. Topics covered include the large-N{sub c} limit of gauge theories, the gravitational description of gauge theory thermodynamics and hydrodynamics, and the physics of quarks and mesons in the quark-gluon plasma.

Mateos, David [Institucio Catalana de Recerca i Estudis Avancats (ICREA), Barcelona (Spain) and Departament de Fisica Fonamental and Institut de Ciencies del Cosmos, Universitat de Barcelona, Diagonal 647, E-08028 Barcelona (Spain)

2010-11-12T23:59:59.000Z

410

Gauge invariant metric fluctuations in the early universe from STM theory of gravity: nonperturbative formalism  

E-Print Network (OSTI)

We develop a nonperturbative quantum field formalism to describe scalar gauge-invariant metric flucturations in the early universe from a 5D apparent (Ricci flat) vacuum.

Mariano Anabitarte; Mauricio Bellini

2007-05-23T23:59:59.000Z

411

Supersymmetric U(N) Gauge Model and Partial Breaking of N=2 Supersymmetry  

E-Print Network (OSTI)

We review the construction of the N=2 U(N) gauge model and the analysis of vacua of the model. On the vacua, N=2 supersymmetry is spontaneously broken to N=1, and the gauge symmetry is broken to a product gauge group \\prod_{i=1}^n U(N_i). The masses of the supermultiplets appearing on the N=1 vacua are given. We provide a manifestly N=2 supersymmetric formulation of the U(N) gauge model coupled with N=2 hypermultiplets, and show that N=2 supersymmetry is partially broken down to N=1 spontaneously.

Kazuhito Fujiwara; Hiroshi Itoyama; Makoto Sakaguchi

2006-02-25T23:59:59.000Z

412

Numerical test of the Gribov-Zwanziger scenario in Landau gauge  

E-Print Network (OSTI)

We review the status of lattice simulations of gluon and ghost propagators in Landau gauge, testing predictions of the Gribov-Zwanziger confinement scenario.

Attilio Cucchieri; Tereza Mendes

2010-01-14T23:59:59.000Z

413

A gauged baby Skyrme model and a novel BPS bound  

E-Print Network (OSTI)

The baby Skyrme model is a well-known nonlinear field theory supporting topological solitons in two space dimensions. Its action functional consists of a potential term, a kinetic term quadratic in derivatives (the "nonlinear sigma model term") and the Skyrme term quartic in first derivatives. The limiting case of vanishing sigma model term (the so-called BPS baby Skyrme model) is known to support exact soliton solutions saturating a BPS bound which exists for this model. Further, the BPS model has infinitely many symmetries and conservation laws. Recently it was found that the gauged version of the BPS baby Skyrme model with gauge group U(1) and the usual Maxwell term, too, has a BPS bound and BPS solutions saturating this bound. This BPS bound is determined by a superpotential which has to obey a superpotential equation, in close analogy to the situation in supergravity. Further, the BPS bound and the corresponding BPS solitons only may exist for potentials such that the superpotential equation has a global...

Adam, C; Sanchez-Guillen, J; Wereszczynski, A

2012-01-01T23:59:59.000Z

414

Hadron potentials within the gauge/string correspondence  

Science Conference Proceedings (OSTI)

It is known, since the 70s, that the large N 't Hooft limit of gauge theories is related to string theories. In 1998, J. M. Maldacena identified precisely such a relation: the so-called AdS/CFT correspondence which speculates a duality between a large N strongly-coupled supersymmetric and conformal Yang-Mills theory in four dimensions and a weakly-coupled string theory defined in a five-dimensional anti-de Sitter AdS{sub 5} space-time. This review aims at introducing concepts and methods used to derive, in the framework of the gauge/string correspondence, the interaction potentials of mesons and baryons at zero and finite temperature. The dual string configurations associated with the different kinds of hadrons are described and their behaviours at short and large distances are understood. Although the application of Maldacena's AdS/CFT conjecture to QCD is not straightforward, QCD being neither supersymmetric nor conformal, the AdS/QCD correspondence approach attempts to identify the dual theory of QCD. Especially, the study of heavy quark-antiquark bound-states leads to establish general dual criteria for the confinement.

Jugeau, Frederic, E-mail: jugeau@ihep.ac.c [Institute of High Energy Physics, Chinese Academy of Sciences, P. O. Box 918(4), Beijing 100049 (China); Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049 (China)

2010-08-15T23:59:59.000Z

415

Gauge/String-Gravity Duality and Froissart Bound  

E-Print Network (OSTI)

The gauge/string-gravity duality correspondence opened renewed hope and possibility to address some of the fundamental and non-perturbative QCD problems in particle physics, such as hadron spectrum and Regge behavior of the scattering amplitude at high energies. One of the most fundamental and long-standing problem is the high energy behavior of total cross-sections. According to a series of exhaustive tests by the COMPETE group, (1). total cross-sections have a universal Heisenberg behavior in energy corresponding to the maximal energy behavior allowed by the Froissart bound, i.e., $A + B ln^2 (s/s_0)$ with $B \\sim 0.32 mb$ and $s_0 \\sim 34.41 GeV^2$ for all reactions, and (2). the factorization relation among $\\sigma_{pp, even}, \\sigma_{\\gamma p}, and \\sigma_{\\gamma \\gamma}$ is well satisfied by experiments. I discuss the recent interesting application of the gauge/string-gravity duality of $AdS/CFT$ correspondence with a deformed background metric so as to break the conformal symmetry that can lead to the Heisenberg behavior of rising total cross-sections, and present some preliminary results on the high energy QCD from Planckian scattering in $AdS$ and black-hole production.

Kyungsik Kang

2004-10-16T23:59:59.000Z

416

Hidden symmetries induced by a canonical transformation and gauge structure of compactified Yang-Mills theories  

E-Print Network (OSTI)

Compactified Yang-Mills theories with one universal extra dimension were found [arXiv:1008.4638] to exhibit two types of gauge invariances: the standard gauge transformations (SGTs) and the nonstandard gauge transformations (NSGTs). In the present work we show that these transformations are not exclusive to compactified scenarios. Introducing a notion of hidden symmetry, based on the fundamental concept of canonical transformation, we analyse three different gauge systems, each of which is mapped to a certain effective theory that is invariant under the so-called SGTs and NSGTs. The systems under discussion are: (i) four dimensional pure $SU(3)$ Yang-Mills theory, (ii) four dimensional $SU(3)$ Yang-Mills with spontaneous symmetry breaking, and (iii) pure Yang-Mills theory with one universal compact extra dimension. The canonical transformation, that induces the notion of hidden symmetry, maps objects with well defined transformation laws under a gauge group $G$ to well defined objects under a non-trivial subgroup $H \\subset G$. In the case where spontaneous symmetry breaking is present, the set of SGTs corresponds to the group into which the original gauge group is broken into, whereas the NSGTs are associated to the broken generators and can be used to define the unitary gauge. For the system (iii), the SGTs coincide with the gauge group $ SU(N,\\cal{M}^{4}) $, whereas the NSGTs do not form a group; in this system the 'fundamental' theory and the effective one are shown to be classically equivalent.

M. A. López-Osorio; E. Martínez-Pascual; H. Novales-Sánchez; J. J. Toscano

2013-02-13T23:59:59.000Z

417

125 GeV Higgs Boson From Gauge-Higgs Unification: A Snowmass white paper  

E-Print Network (OSTI)

In certain five dimensional gauge theories compactified on the orbifold $S^1/Z_2$ the Standard Model Higgs doublet is identified with the zero mode of the fifth component of the gauge field. This gauge-Higgs unification scenario is realized at high energies, and the Standard Model as an effective theory below the compactification scale satisfies the boundary condition that the Higgs quartic coupling vanishes at the compactification scale (gauge-Higgs condition). This is because at energies above the compactification scale, the five dimensional gauge invariance is restored and the Higgs potential vanishes as a consequence. We consider scenario where top quark Yukawa and weak gauge coupling unification can be realized and identify the compactification scale as one at which this two coupling couplings have the same value. Taking into account the experimental uncertainties in measurements of the top quark mass and the QCD coupling constant, the Higgs mass prediction of 119-126 GeV from the gauge-Higgs unification scenario is consistent with the experimentally measured value of 125-126 GeV. More precise measurements of the top quark mass and the QCD coupling constant are crucial to reduce the interval of the Higgs mass prediction and thereby test the feasibility of the gauge-Higgs unification scenario.

Ilia Gogoladze; Nobuchika Okada; Qaisar Shafi

2013-07-18T23:59:59.000Z

418

A Gauge-Based Analysis of Daily Precipitation over East Asia  

Science Conference Proceedings (OSTI)

A new gauge-based analysis of daily precipitation has been constructed on a 0.5° latitude–longitude grid over East Asia (5°–60°N, 65°–155°E) for a 26-yr period from 1978 to 2003 using gauge observations at over 2200 stations collected from ...

Pingping Xie; Mingyue Chen; Song Yang; Akiyo Yatagai; Tadahiro Hayasaka; Yoshihiro Fukushima; Changming Liu

2007-06-01T23:59:59.000Z

419

Improving tide-gauge data processing: A method involving tidal frequencies and inverted barometer effect  

Science Conference Proceedings (OSTI)

Sea level measured at tide-gauge stations is affected by undesired events such as spikes, gaps, steps and time shifts. The presence of these instrumental failures seriously decreases the quality of each analysis done using the record. Furthermore, they ... Keywords: Data processing, Inverted barometer effect, Ocean tides, Sea-level changes, Tide-gauge observations

E. Gil; C. de Toro

2005-10-01T23:59:59.000Z

420

Physical interpretation of gauge invariant perturbations of spherically symmetric space-times  

E-Print Network (OSTI)

By calculating the Newman-Penrose Weyl tensor components of a perturbed spherically symmetric space-time with respect to invariantly defined classes of null tetrads, we give a physical interpretation, in terms of gravitational radiation, of odd parity gauge invariant metric perturbations. We point out how these gauge invariants may be used in setting boundary and/or initial conditions in perturbation theory.

Brien C. Nolan

2004-06-11T23:59:59.000Z

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

Rain-Induced Increase in Background Radiation Detected by Radiation Portal Monitors  

Science Conference Proceedings (OSTI)

A complete understanding of both the steady state and transient background measured by Radiation Portal Monitors (RPMs) is essential to predictable system performance, as well as maximization of detection sensitivity. To facilitate this understanding, a test bed for the study of natural background in RPMs has been established at the Oak Ridge National Laboratory. This work was performed in support of the Second Line of Defense Program's mission to detect the illicit movement of nuclear material. In the present work, transient increases in gamma ray counting rates in RPMs due to rain are investigated. The increase in background activity associated with rain, which has been well documented in the field of environmental radioactivity, originates from the atmospheric deposition of two radioactive daughters of radon-222, namely lead-214 and bismuth-214 (henceforth {sup 222}Rn, {sup 214}Pb and {sup 214}Bi). In this study, rainfall rates recorded by a co-located weather station are compared with RPM count rates and High Purity Germanium spectra. The data verifies these radionuclides are responsible for the dominant transient natural background fluctuations in RPMs. Effects on system performance and potential mitigation strategies are discussed.

Hausladen, Paul [ORNL; Blessinger, Christopher S [ORNL; Guzzardo, Tyler [ORNL; Livesay, Jake [ORNL

2012-07-01T23:59:59.000Z

422

Core hole drilling and the ''rain current'' phenomenon at Newberry Volcano, Oregon  

SciTech Connect

Two core holes have been completed on the flanks of Newberry Volcano, Oregon. Core hole Geo N-1 has a heat flow of 180 mW m/sup -2/, reflecting subsurface temperatures, sufficient for commerical exploitation of geothermally generated electricity. GEO N-3, which has a heat flow of 86 mW m/sup -2/, is less encouraging. We emphasize the ''rain curtain'' effect with the hope that a detailed discussion of this phenomenon at two distinct localities will lead to a better understanding of the physical processes in operation. Cole hole GEO N-1 was cored to a depth of 1387 m at a site located 9.3 km south of the center of the volcano. Core hole GEO N-3 was cored to a depth of 1220 m at a site located 12.6 km north of the center of the volcano. Both core holes penetrated interbedded pyroclastic lava flows and lithic tuffs ranging in composition from basalt to rhyolite, basaltic andesite being the most common rock type. Potassium-argon age dates range up to 2 Ma. Caving and sloughing were encountered in both core holes at depths near the regional water table. Both core holes penetrate three distinct thermal regimes. The uppermost regime is isothemal at mean air temperature down to about 900-1000 m (the rain curtain).

Swanberg, C.A.; Walkey, W.C.; Combs, J.

1988-09-10T23:59:59.000Z

423

Using biodiversity methods to assess the impacts of oil and gas development in tropical rain forests  

Science Conference Proceedings (OSTI)

Oil and gas development in tropical rain forests has attracted international attention because of the potentially adverse effects on the forest ecosystems. Biodiversity is a topic of particular concern, but is difficult to assess for small areas of disturbance. In July 1992 we used light traps to compare insect diversity at canopy and ground level as a means of detecting the impacts of an exploratory well site and related facilities within mature Amazonian rain forest in the Oriente Province of Ecuador. Replicate samples were collected at the well site, in a nearby area of agricultural development, and in a reference site within mature forest. Species richness was determined, and diversity indices were calculated for each set of samples. Results indicated that changes in diversity could be detected in the canopy and at ground level at the well site, but that the reduction in diversity was small. Biological diversity was substantially reduced in the area of agricultural development. Limitations and possible applications of this approach are discussed.

Reagan, D.P.; Silva del Poso, X. [Woodward-Clyde Consultants, Denver, CO (United States)]|[Sociedad Entomologica Ecuatoriana, Quito (Ecuador)

1995-06-01T23:59:59.000Z

424

Overview of the oxidation and scavenging characteristics of April rains (OSCAR) experiment  

SciTech Connect

The OSCAR (Oxidation and Scavenging Characteristics of April Rains) field experiment was conducted in April, 1981, as part of the MAP3S/RAINE program. The OSCAR study was designed to provide detailed characterizations of the physicochemical and dynamical features of selected cyclonic storm systems as they traversed the eastern U.S. Major experiment components included sequential precipitation chemistry measurements, aircraft measurements both in cloud and in clear air in storm inflow regions, surface-level air chemistry measurements, and supporting meteorological measurements. The precipitation chemisty network consisted of an intermediate-density network with 37 sampling sites covering the region from southern Ontario to Tennessee and from Illinois to New Hampshire, and a high-density network with 47 sampling sites located in a 100 by 100 km area in northeast Indiana. A total of four storm events were studied during the experiment. The report describes the design and operational aspects for the high-density and intermediate-density components of the experiment, and the composition of the integrated OSCAR data set which has been developed. A synoptic meteorological description of the four storm events studied during OSCAR is also provided. 17 references, 13 figures, 8 tables.

Easter, R.C.; Dana, M.T.; Thorp, J.M.; Busness, K.M.; Hales, J.M.; Raynor, G.S.; Benkovitz, C.M.; Tanner, R.L.; Shannon, J.D.

1984-04-01T23:59:59.000Z

425

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,

426

Unstable particles, gauge invariance and the Delta^{++} resonance parameters  

E-Print Network (OSTI)

The elastic and radiative pion(+)-proton scattering are studied in the framework of an effective Lagrangian model for the Delta^{++} resonance and its interactions. The finite width effects of this spin-3/2 resonance are introduced in the scattering amplitudes through a complex mass scheme to respect electromagnetic gauge invariance. The resonant pole (Delta^{++}) and background contributions (rho^0, sigma, Delta and neutron states) are separated according to the principles of the analytic S-matrix theory. The mass and width parameters of the \\Delta^{++} obtained from a fit to experimental data on the total cross section are in agreement with the results of a model-independent analysis based on the analytic S-matrix approach. The magnetic dipole moment determined from the radiative pion-proton scattering is mu_Delta^{++}=(6.14 +/- 0.51) nuclear magnetons.

G. Lopez Castro; A. Mariano

2003-02-24T23:59:59.000Z

427

Deeply virtual Compton scattering from gauge/gravity duality  

Science Conference Proceedings (OSTI)

We use gauge/gravity duality to study deeply virtual Compton scattering (DVCS) in the limit of high center of mass energy at fixed momentum transfer, corresponding to the limit of low Bjorken x, where the process is dominated by the exchange of the pomeron. At strong coupling, the pomeron is described as the graviton Regge trajectory in AdS space, with a hard wall to mimic confinement effects. This model agrees with HERA data in a large kinematical range. The behavior of the DVCS cross section for very high energies, inside saturation, can be explained by a simple AdS black disk model. In a restricted kinematical window, this model agrees with HERA data as well.

Costa, Miguel S.; Djuric, Marko [University of Porto (Portugal)

2013-04-15T23:59:59.000Z

428

A TRANSISTORIZED ALPHA COUNTER FOR AN ALPHA GAUGE  

SciTech Connect

A transistorized instrument prototype was designed and constructed to replace a vacuum-tube instrument in an alpha gauge, which measures the thickness density of gases. The instrument amplifies, shapes, discriminates, and counts alpha pulses from a Au-Si surface-barrier detector exposed to an alpha source in a gas-filled chamber. The circuit consists of a charge-sensitive preamplifier, a main amplifier with pulse clipping, a Schmitt trigger, a diode pump, and a count rate meter. Preliminary tests gave results comparable to the vacuum-tube instrument. Accuracy of counting was within 10% for 0.5- to 10-Mev alpha particles emitted at a maximum rate of 10/sup 6 per sec. The instrument was stable at 25 to 55 deg C, is small and portable, and costs less than 0. An infinitely thick, alpha source that will give a high count rate is being constructed for final tests. (auth)

Kopp, M.C.

1962-08-23T23:59:59.000Z

429

A nanocrystal strain gauge for luminescence detection of mechanical forces  

Science Conference Proceedings (OSTI)

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

430

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

431

Climatology-Calibrated Precipitation Analysis at Fine Scales: Statistical Adjustment of Stage IV towards CPC Gauge Based Analysis  

Science Conference Proceedings (OSTI)

Two widely used precipitation analyses are the CPC Unified Global Daily Gauge Analysis and Stage IV analysis based on quantitative precipitation estimate with multi-sensor observations. The Former is based on gauge records with a uniform quality ...

Dingchen Hou; Mike Charles; Yan Luo; Zoltan Toth; Yuejian Zhu; Roman Krzysztofowicz; Ying Lin; Pingping Xie; Dong-Jun Seo; Malaquias Pena; Bo Cui

432

Buckets: Smart Objects for Digital Libraries  

Science Conference Proceedings (OSTI)

Current discussion of digital libraries (DLs) is often dominated by the merits of the respective storage, search and retrieval functionality of archives, repositories, search engines, search interfaces and database systems. While these technologies are ...

Nelson Michael L.

2001-08-01T23:59:59.000Z

433

Theoretical Analysis and Meteorological Interpretation of the Role of Raindrop Shape on Microwave Attenuation and Propagation Phase Shifts: Implication for the Radar Measurement of Rain  

Science Conference Proceedings (OSTI)

In rain radars can measure various powers of the drop diameter averaged over the drop size distribution. These averages can then be used to infer rain water content (W) or the rainfall rate in still air (R0). Besides being sensitive to drop sizes ...

A. R. Jameson

1989-02-01T23:59:59.000Z

434

The U.S. Acid rain program: Key insights from the design, operation, and assessment of a Cap-and-Trade program  

Science Conference Proceedings (OSTI)

The authors' 15 years of experience with the Acid Rain Program suggests that for regional or larger-scale air pollution problems, such as acid rain and pollution transport, a well-designed cap-and-trade program can be cost-effective, flexible, and easy to implement with clear benefits that can be sustained into the future. (author)

Napolitano, Sam; Schreifels, Jeremy; Stevens, Gabrielle; Witt, Maggie; LaCount, Melanie; Forte, Reynaldo; Smith, Kenon

2007-08-15T23:59:59.000Z

435

A Manifestly Gauge Invariant, Continuum Calculation of the SU(N) Yang-Mills two-loop beta function  

E-Print Network (OSTI)

The manifestly gauge invariant Exact Renormalisation Group provides a framework for performing continuum computations in SU(N) Yang-Mills theory, without fixing the gauge. We use this formalism to compute the two-loop beta function in a manifestly gauge invariant way, and without specifying the details of the regularisation scheme.

Tim R. Morris; Oliver J. Rosten

2005-08-04T23:59:59.000Z

436

Three-Dimensional N \\geq 5 Superconformal Chern-Simons Gauge Theories And Their Relations  

E-Print Network (OSTI)

We propose three-dimensional N=6 superconformal U(N) X U(M) and SU(N) X SU(N) Chern-Simons gauge theories with two pairs of bifundamental chiral superfields in the (N, M) and (\\overline{N}, \\overline{M}) representations and in the (N, N) and (\\overline{N}, \\overline{N}) representations, respectively. We also propose the superconformal U(1) X U(1) gauge theories that have n pairs of bifundamental chiral superfields with U(1) X U(1) charges (\\pm 1, \\mp 1) or (\\pm 1, \\pm 1). Although these U(1) X U(1) gauge theories have global symmetry SU(2n), the R-symmetry is SO(6) for n=2, and might be SO(2n) or SO(2n+1) for 3 \\leq n \\leq 8. In addition, we show that from either the generalized ABJM theories, or our U(N) X U(M) theories, or the N=5 superconformal O(N) X USp(2M) gauge theories, we can derive all the N \\geq 5 superconformal Chern-Simons gauge theories except the N=5 superconformal G_2 X USp(2) gauge theory and our U(1) X U(1) gauge theories with n \

Tianjun Li

2008-10-13T23:59:59.000Z

437

Correction of Radar Reflectivity and Differential Reflectivity for Rain Attenuation at X Band. Part I: Theoretical and Empirical Basis  

Science Conference Proceedings (OSTI)

In this two-part paper, a correction for rain attenuation of radar reflectivity (ZH) and differential reflectivity (ZDR) at the X-band wavelength is presented. The correction algorithm that is used is based on the self-consistent method with ...

S-G. Park; V. N. Bringi; V. Chandrasekar; M. Maki; K. Iwanami

2005-11-01T23:59:59.000Z

438

The Relation of Radar to Cloud Area-Time Integrals and Implications for Rain Measurements from Space  

Science Conference Proceedings (OSTI)

In this work we determine the relationships between satellite-based and radar-measured area-time integrals (ATI) for convective storms and show how both depend upon the climatological conditional mean rain rate Rc, and the ratio of the measured ...

David Atlas; Thomas L. Bell

1992-09-01T23:59:59.000Z

439

The Influence of Entrainment and Mixing on the Initial Formation of Rain in a Warm Cumulus Cloud  

Science Conference Proceedings (OSTI)

The objective of this study is to address the problem of the production of rain in warm cumulus clouds that has been observed to occur within about 20 min. A hybrid model approach is used where a microphysical parcel model is run along ...

William A. Cooper; Sonia G. Lasher-Trapp; Alan M. Blyth

2013-06-01T23:59:59.000Z

440

Tests of Rain Profiling Algorithms for a Spaceborne Radar Using Raincell Models and Real Data Precipitation Fields  

Science Conference Proceedings (OSTI)

This paper compares the performances of several algorithms for profiling the rain rate from a spaceborne radar. Three techniques are considered: single frequency (or SF) at 13.8, or 24 GHz; dual frequency (or DF) at 13.8 and 24 GHz; and dual beam ...

Jacques Testud; Paul Amayenc; Xiankang Dou; Taoufix Tani

1996-04-01T23:59:59.000Z

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.


441

The Use of Partial Cloudiness in a Warm-Rain Parameterization: A Subgrid-Scale Precipitation Scheme  

Science Conference Proceedings (OSTI)

A method is proposed on how to handle the effects of partial cloudiness in a warm-rain microphysical scheme and how to generate subgrid-scale precipitation. The method is simple and concerns essentially two ideas: the use of the vertical ...

Peter Bechtold; Jean Pierre Pinty; Patrick Mascart

1993-12-01T23:59:59.000Z

442

Rain versus Snow in the Sierra Nevada, California: Comparing Doppler Profiling Radar and Surface Observations of Melting Level  

Science Conference Proceedings (OSTI)

The maritime mountain ranges of western North America span a wide range of elevations and are extremely sensitive to flooding from warm winter storms, primarily because rain falls at higher elevations and over a much greater fraction of a basin’s ...

Jessica D. Lundquist; Paul J. Neiman; Brooks Martner; Allen B. White; Daniel J. Gottas; F. Martin Ralph

2008-04-01T23:59:59.000Z

443

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

444

Managing nontechnical risks associated with seismic operations in the tropical rain forests of Ecuador  

Science Conference Proceedings (OSTI)

Companies operating in sensitive areas are being challenged to address the environmental and social issues while preserving these areas for future generations. This increased international attention on environmental and sociocultural issues has led Amoco to focus efforts on developing new ideas and strategies to facilitate environmental and cultural management. In Ecuador, the major oil producing region is the Ecuadorian portion of the Amazon Basin, referred to locally as the Oriente. Amoco Ecuador BV recently completed a seismic acquisition program in the Oriente with minimum impact to the environment and the communities within the project area. The goal of this article is to describe Amoco`s experience in managing environmental, social, and public perception issues associated with seismic operations in the rain forests of Ecuador.

Barker, G.; Smith, G.R.; Vacas, F.J. [Amoco Corp., Houston, TX (United States); Swingholm, E.K.; Yuill, R.M.; Aleman, M.A.

1997-04-21T23:59:59.000Z

445

1  

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

Figure 2. The infrared sky imager at the SGP CF. Dynamic Rain Gauge Calibrator A new dynamic rain gauge calibrator has been built and is being used to calibrate rain...

446

The cost of gauge coupling unification in the SU(5) model at three loops  

E-Print Network (OSTI)

The non-supersymmetric SU(5) model can accommodate heavy neutrinos and gauge coupling unification when augmented with an adjoint fermionic multiplet 24_F. Among the most important phenomenological implications of the model is the prediction of light fermions and scalars, charged under the SU(2) gauge group, in the reach of the Large Hadron Collider (LHC). In this talk, we report on the recent calculation of the correlation function between the mass scale of the new electroweak multiplets and the gauge coupling unification scale at three loop accuracy.

L. Mihaila

2013-05-14T23:59:59.000Z

447

Gauge-Higgs Unification: Stable Higgs Bosons as Cold Dark Matter  

E-Print Network (OSTI)

In the gauge-Higgs unification the 4D Higgs field becomes a part of the extra-dimensional component of the gauge potentials. In the $SO(5) \\times U(1)$ gauge-Higgs unification in the Randall-Sundrum warped spacetime the electroweak symmetry is dynamically broken through the Hosotani mechanism. The Higgs bosons become absolutely stable, and become the dark matter of the universe. The mass of the Higgs boson is determined from the WMAP data to be about 70 GeV.

Yutaka Hosotani

2010-03-16T23:59:59.000Z

448

Light-cone gauge Hamiltonian for AdS_4 x CP^3 superstring  

E-Print Network (OSTI)

It is developed the phase-space formulation for the Type IIA superstring on the AdS_4 x CP^3 background in the kappa-symmetry light-cone gauge for which the light-like directions are taken from the D=3 Minkowski boundary of AdS_4. After fixing bosonic light-cone gauge the superstring Hamiltonian is expressed as a function of the transverse physical variables and in the quadratic approximation corresponds to the light-cone gauge-fixed IIA superstring in flat space.

D. V. Uvarov

2009-12-07T23:59:59.000Z

449

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.

Thomas Heinzl; Anton Ilderton; Kurt Langfeld; Martin Lavelle; David McMullan

2008-07-29T23:59:59.000Z

450

Evidence for layered symmetry breaking in SU(2) lattice gauge theory  

E-Print Network (OSTI)

Simulations of four-dimensional SU(2) lattice gauge theory are performed with partial axial gauge fixing trees spanning three of the four dimensions. The remaining SU(2) gauge symmetry, global in three directions and local in one, is found to break spontaneously at weak coupling, with the average fourth-dimension-pointing link in each perpendicular hyperplane as order parameter. The symmetry is restored at strong coupling. Symmetry breaking in each hyperplane appears to be independent, and occurs regardless of boundary conditions. The associated phase transition is likely coincident with the Polyakov loop transition.

Michael Grady

2004-09-29T23:59:59.000Z

451

Gravity-induced birefringence within the framework of Poincare gauge theory  

E-Print Network (OSTI)

Gauge theories of gravity provide an elegant and promising extension of general relativity. In this paper we show that the Poincar\\'e gauge theory exhibits gravity-induced birefringence under the assumption of a specific gauge invariant nonminimal coupling between torsion and Maxwell's field. Furthermore we give for the first time an explicit expression for the induced phaseshift between two orthogonal polarization modes within the Poincar\\'e framework. Since such a phaseshift can lead to a depolarization of light emitted from an extended source this effect is, in principle, observable. We use white dwarf polarimetric data to constrain the essential coupling constant responsible for this effect.

Oliver Preuss; Sami K. Solanki; M. P. Haugan; Stefan Jordan

2005-07-16T23:59:59.000Z

452

QCD in terms of gauge-invariant dynamical variables  

E-Print Network (OSTI)

For a complete description of the physical properties of low-energy QCD, it might be advantageous to first reformulate QCD in terms of gauge-invariant dynamical variables, before applying any approximation schemes. Using a canonical transformation of the dynamical variables, which Abelianises the non-Abelian Gauss-law constraints to be implemented, such a reformulation can be achieved for QCD. The exact implementation of the Gauss laws reduces the colored spin-1 gluons and spin-1/2 quarks to unconstrained colorless spin-0, spin-1, spin-2 and spin-3 glueball fields and colorless Rarita-Schwinger fields respectively. The obtained physical Hamiltonian can then be rewritten into a form, which separates the rotational from the scalar degrees of freedom, and admits a systematic strong-coupling expansion in powers of lambda=g^{-2/3}, equivalent to an expansion in the number of spatial derivatives. The leading-order term in this expansion corresponds to non-interacting hybrid-glueballs, whose low-lying masses can be ...

Pavel, Hans-Peter

2013-01-01T23:59:59.000Z

453

Space-Time Diffeomorphisms in Noncommutative Gauge Theories  

E-Print Network (OSTI)

In previous work [Rosenbaum M. et al., J. Phys. A: Math. Theor. 40 (2007), 10367-10382, hep-th/0611160] we have shown how for canonical parametrized field theories, where space-time is placed on the same footing as the other fields in the theory, the representation of space-time diffeomorphisms provides a very convenient scheme for analyzing the induced twisted deformation of these diffeomorphisms, as a result of the space-time noncommutativity. However, for gauge field theories (and of course also for canonical geometrodynamics) where the Poisson brackets of the constraints explicitely depend on the embedding variables, this Poisson algebra cannot be connected directly with a representation of the complete Lie algebra of space-time diffeomorphisms, because not all the field variables turn out to have a dynamical character [Isham C.J., Kuchar K.V., Ann. Physics 164 (1985), 288-315, 316-333]. Nonetheless, such an homomorphic mapping can be recuperated by first modifying the original action and then adding addi...

Rosenbaum, Marcos; Juarez, L Roman

2008-01-01T23:59:59.000Z

454

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

455

Accuracy of NWS 8" Standard Nonrecording Precipitation Gauge: Results and Application of WMO Intercomparison  

Science Conference Proceedings (OSTI)

The standard 8" nonrecording precipitation gauge has been used historically by the National Weather Service (NWS) as the official precipitation measurement instrument of the U.S. climate station network. From 1986 to 1992, the accuracy and ...

Daqing Yang; Barry E. Goodison; John R. Metcalfe; Valentin S. Golubev; Roy Bates; Timothy Pangburn; Clayton L. Hanson

1998-02-01T23:59:59.000Z

456

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

2008-08-15T23:59:59.000Z

457

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

Science Conference Proceedings (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

458

Synthetic Subsurface Pressure Derived from Bottom Pressure and Tide Gauge Observations  

Science Conference Proceedings (OSTI)

Synthetic subsurface pressure (SSP) can be formed from tide gauge records and from bottom pressure measurements to provide a consistent and convenient basis for comparison of these two different types of observations. Common methods for this ...

Sabine Harms; Clinton D. Winant

1994-12-01T23:59:59.000Z

459

Inflaton field fluctuations from gauge-invariant metric fluctuations during inflation  

E-Print Network (OSTI)

The evolution of the inflaton field fluctuations from gauge-invariant metric fluctuations is discused. In particular, the case of a symmetric $\\phi_c$-exponential potential is analyzed.

Mariano Anabitarte; Mauricio Bellini

2004-06-28T23:59:59.000Z

460

A Study of Delays in Making Tide Gauge Data Available to Tsunami Warning Centers  

Science Conference Proceedings (OSTI)

This short note provides conclusions of a study of the various factors that determine the delay between tsunami arrival at a tide gauge station and data being made available at tsunami warning centers. The various delays involved include those ...

S. J. Holgate; P. L. Woodworth; P. R. Foden; J. Pugh

2008-03-01T23:59:59.000Z

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.


461

Analyses of Global Monthly Precipitation Using Gauge Observations, Satellite Estimates, and Numerical Model Predictions  

Science Conference Proceedings (OSTI)

An algorithm is developed to construct global gridded fields of monthly precipitation by merging estimates from five sources of information with different characteristics, including gauge-based monthly analyses from the Global Precipitation ...

Pingping Xie; Phillip A. Arkin

1996-04-01T23:59:59.000Z

462

Gauge-potential approach to the kinematics of a moving car  

E-Print Network (OSTI)

A kinematics of the motion of a car is reformulated in terms of the theory of gauge potentials (connection on principal bundle). E(2)-connection originates in the no-slipping contact of the car with a road.

Marian Fecko

1997-03-07T23:59:59.000Z

463

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

464

A low-energy solution to the mu-problem in gauge mediation  

E-Print Network (OSTI)

In the gauge-mediation framework the soft supersymmetry breaking mass parameters of the supersymmetric standard model are induced by the gauge interactions of some messenger fields. The parameters exhibit flavor universality which is dictated by the gauge interactions and which efficiently eliminates new dangerous contributions to flavor changing neutral currents. However, the Higgs potential in this framework typically contains an unacceptable hierarchy between its dimensionful parameters (the $\\mu$-problem of gauge mediation). We show that the problem can be resolved if the Higgs potential arises dynamically once an intermediate U(1)' sector is integrated out rather than arising radiatively from some Yukawa interactions at the messenger scale. As an added benefit, such models may naturally avoid new contribution to CP violating amplitudes. The proposed framework is described, explicit examples are given and its phenomenology is explored. The $\\mu$ problem is resolved in this case by the low-energy U(1)' dynamics which could be tested in future collider experiments.

Paul Langacker; Nir Polonsky; Jing Wang

1999-05-05T23:59:59.000Z

465

Hawking radiation via anomaly cancellation for the black holes of five-dimensional minimal gauged supergravity  

E-Print Network (OSTI)

The anomaly cancellation method proposed by Wilczek et al. is applied to the general charged rotating black holes in five-dimensional minimal gauged supergravity. Thus Hawking temperature and fluxes are found. The Hawking ...

Porfyriadis, Achilleas P.

466

Statistical Evaluation of Combined Daily Gauge Observations and Rainfall Satellite Estimates over Continental South America  

Science Conference Proceedings (OSTI)

This paper describes a comprehensive assessment of a new high-resolution, gauge–satellite-based analysis of daily precipitation over continental South America during 2004. This methodology is based on a combination of additive and multiplicative ...

Daniel A. Vila; Luis Gustavo G. de Goncalves; David L. Toll; Jose Roberto Rozante

2009-04-01T23:59:59.000Z

467

New Gauge Conditions in General Relativity: What Can We Learn from Them?  

E-Print Network (OSTI)

The construction of conformally invariant gauge conditions for Maxwell and Einstein theories on a manifold M is found to involve two basic ingredients. First, covariant derivatives of a linear gauge (e.g. Lorenz or de Donder), completely contracted with the tensor field representing the metric on the vector bundle of the theory. Second, the addition of a compensating term, obtained by covariant differentiation of a suitable tensor field built from the geometric data of the problem. If the manifold M is endowed with an m-dimensional positive-definite metric g, the existence theorem for such a gauge in gravitational theory can be proved. If the metric g is Lorentzian, which corresponds to general relativity, some technical steps are harder, but one has again to solve integral equations on curved space-time to be able to impose such gauges.

Giampiero Esposito; Cosimo Stornaiolo

1999-10-08T23:59:59.000Z

468

The tricritical point of finite-temperature phase transitions in large N(Higgs) gauge theories  

E-Print Network (OSTI)

Gauge theories broken by a single Higgs field are known to have first-order phase transitions in temperature if $\\lambda/g^2 \\ll 1$, where $g$ is the gauge coupling and $\\lambda$ the Higgs self-coupling. If the theory is extended from one to $N$ Higgs doublets, with U($N$) flavor symmetry, the transition is known to be second order for $\\lambda/g^2 \\gtrsim 1$ in the $N\\to\\infty$ limit. We show that one can in principal compute the tricritical value of $\\lambda/g^2$, separating first from second-order transitions, to any order in $1/N$. In particular, scalar fluctuations at the transition damp away the usual problems with the infrared behavior of high-temperature non-Abelian gauge theories. We explicitly compute the tricritical value of $\\lambda/g^2$ for U(1) and SU(2) gauge theory to next-to-leading order in $1/N$.

Peter Arnold; David Wright

1996-10-02T23:59:59.000Z

469

Probing Extra Matter in Gauge Mediation Through the Lightest Higgs Boson Mass  

E-Print Network (OSTI)

We discuss the implications of the excesses in LHC Higgs boson searches on the gauge mediated supersymmetric standard model, for the mass range 120-140\\,GeV. We find that a relatively heavy lightest Higgs boson mass in this range can be reconciled with light SUSY particles, $m_{\\rm gluino}Higgs boson. We also find that the mass of this extra matter can be predicted rather precisely in gauge mediation for a given Higgs boson and gluino mass.

Evans, Jason L; Yanagida, Tsutomu T

2011-01-01T23:59:59.000Z

470

Corrections to gauge theories in effective quantum gravity with a cutoff  

E-Print Network (OSTI)

We calculate the lowest order quantum gravity contributions to QED beta function in an effective field theory picture with a momentum cutoff. We use a recently proposed 4 dimensional improved momentum cutoff that preserves gauge and Lorentz symmetries. We find that there is non-vanishing quadratic contribution to the photon 2-point function but that does not lead to the running of the original coupling after renormalization. We argue that gravity cannot turn gauge theories asymptotically free.

G. Cynolter; E. Lendvai

2013-07-17T23:59:59.000Z

471

Probing Extra Matter in Gauge Mediation Through the Lightest Higgs Boson Mass  

E-Print Network (OSTI)

We discuss the implications of the excesses in LHC Higgs boson searches on the gauge mediated supersymmetric standard model, for the mass range 120-140\\,GeV. We find that a relatively heavy lightest Higgs boson mass in this range can be reconciled with light SUSY particles, $m_{\\rm gluino}Higgs boson. We also find that the mass of this extra matter can be predicted rather precisely in gauge mediation for a given Higgs boson and gluino mass.

Jason L. Evans; Masahiro Ibe; Tsutomu T. Yanagida

2011-08-17T23:59:59.000Z

472

Grande Ronde Subbasin Gauging Station Operations, 2007-2008 Reporting Period.  

DOE Green Energy (OSTI)

The Grande Ronde Basin (GRB) in Northeast Oregon is a moderately dry climate receiving between 10 and 20 inches of precipitation per year with surrounding mountains accumulating up to 100 inches. Irrigated agriculture is a major part of the economy with water being diverted or pumped from surface and ground sources from April through October. Several ESA listed species exist in the basin including Chinook, steelhead, and bulltrout. Agriculture and ESA (Endangered Species Act) listed aquatic species combined with a dry climate demonstrate the need for a network of stream gauges. The GRB covers over 5,000 square miles and includes several thousand miles of perennial flowing streams. This project is in place to operate 12 existing stream gauges in combination with USGS (4 gauges) and OWRD (one gauge) who, independent of this project, operate five additional gauges (Grande Ronde at Troy, Imnaha R. at Imnaha, Minam R. at Minam, Lookingglass Creek, and Upper Catherine Cr.) to characterizes flow in both the Grande Ronde and Imnaha subbasins. These gauges are intended to assist in irrigation water management, fisheries management, long term flow and trend analysis, TMDL and SB1010 water quality management plan effectiveness, subbasin plan implementation, and provide essential information regarding cumulative effects response to conservation in the GRB. Headwater characteristics, land management influence, and basin outlet data are all selectively collected in this network of 17 flow gauges. Prior to the 2007 water year there were three separate stream gauging programs with similar objectives, protocol, and funding sources in the GRB. Each of these programs for the past ten years has operated under separate administration consuming more time and administrative money than is necessary to accomplish stated objectives. By combining all programs into one project costs have been reduced, each funding source has one contract instead of three, and the same amount of work has been done accomplishing the same objectives. This objective has been continued and realized in the 2008 water year.

Menton, R. Coby [Grande Ronde Model Watershed

2008-11-10T23:59:59.000Z

473

Conformal windows of Sp(2N) and SO(N) gauge theories  

Science Conference Proceedings (OSTI)

We study the nonperturbative dynamics of nonsupersymmetric asymptotically free gauge theories with fermionic matter in distinct representations of the SO(N) and Sp(2N) gauge groups. We use different analytic methods to unveil the associated conformal windows for the relevant matter representations. We propose a direct test for confronting and establishing the validity of the analytic methods used to constrain the conformal windows. By comparing the resulting windows for SU, Sp, and SO a pleasing universal picture emerges.

Sannino, Francesco [University of Southern Denmark, Campusvej 55, DK-5230 Odense M (Denmark)

2009-05-01T23:59:59.000Z

474

Unitary Matrix Model of a Chiral [SU(N)]^K Gauge Theory  

E-Print Network (OSTI)

We build a matrix model of a chiral [SU(N)]^K gauge theory (5D SQCD deconstructed down to 4D) using random unitary matrices to model chiral bifundamental fields (N,N-bar) (without (N-bar,N)). We verify the duality by matching the loop equation of the matrix model to the anomaly equations of the gauge theory. Then we evaluate the matrix model's free energy and use it to derive the effective superpotential for the gaugino condensates.

Edoardo Di Napoli; Vadim S. Kaplunovsky

2005-08-25T23:59:59.000Z

475

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

476

Relationships between Rain Characteristics and Environment. Part I: TRMM Precipitation Features and the Large-Scale Environment over the Tropical Pacific  

Science Conference Proceedings (OSTI)

Differences in the characteristics of rain systems in the eastern Pacific (EP) intertropical convergence zone (ITCZ) and the western Pacific (WP) warm pool are quantitatively examined in relation to the large-scale environment. This study mainly ...

Chie Yokoyama; Yukari N. Takayabu

2012-09-01T23:59:59.000Z

477

Distant Effects of a Recurving Tropical Cyclone on Rainfall in a Midlatitude Convective System: A High-Impact Predecessor Rain Event  

Science Conference Proceedings (OSTI)

Recent research has identified predecessor rain events (PREs), which are mesoscale regions of heavy rainfall that occur 1000 km poleward and downshear of recurving tropical cyclones (TCs). PREs typically occur 24–36 h prior to the arrival of the ...

Russ S. Schumacher; Thomas J. Galarneau Jr.; Lance F. Bosart

2011-02-01T23:59:59.000Z

478

The Challenge of Forecasting Heavy Rain and Flooding throughout the Eastern Region of the National Weather Service. Part I: Characteristics and Events  

Science Conference Proceedings (OSTI)

Heavy rain and flooding are of particular concern to forecasters throughout the eastern and southeastern United States. In this paper, the unique combination of synoptic-scale and mesoscale weather conditions and topographic factors that ...

Kenneth D. Lapenta; Barbara J. McNaught; Steven J. Capriola; Louis A. Giordano; Charles D. Little; Stephen D. Hrebenach; Gary M. Carter; Mario D. Valverde; Derek S. Frey

1995-03-01T23:59:59.000Z

479

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

Science Conference Proceedings (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

480

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

Science Conference Proceedings (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

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481

An Analysis of Errors in Drop Size Distribution Retrievals and Rain Bulk Parameters with a UHF Wind Profiling Radar and a Two-Dimensional Video Disdrometer  

Science Conference Proceedings (OSTI)

Vertically pointed wind profiling radars can be used to obtain measurements of the underlying drop size distribution (DSD) for a rain event by means of the Doppler velocity spectrum. Precipitation parameters such as rainfall rate, radar ...

Laura Kanofsky; Phillip Chilson

2008-12-01T23:59:59.000Z

482

Evaluation of a Satellite Multispectral VIS–IR Daytime Statistical Rain-Rate Classifier and Comparison with Passive Microwave Rainfall Estimates  

Science Conference Proceedings (OSTI)

A daytime surface rain-rate classifier, based on artificial neural networks (ANNs), is proposed for the Spinning Enhanced Visible and Infrared Imager (SEVIRI) on board the Meteosat-8 geostationary satellite. It is developed over the British Isles ...

Davide Capacci; Federico Porcù

2009-02-01T23:59:59.000Z

483

A Space-Filling Algorithm to Extrapolate Narrow-Swath Instantaneous TRMM Microwave Rain-Rate Estimates Using Thermal IR Imagery  

Science Conference Proceedings (OSTI)

A space-filling algorithm (SFA) based on 2D spectral estimation techniques was developed to extrapolate the spatial domain of the narrow-swath near-instantaneous rain-rate estimates from Tropical Rainfall Measuring Mission (TRMM) precipitation ...

Ana P. Barros; Kun Tao

2008-11-01T23:59:59.000Z

484

The Area-Time-Integral Technique to Estimate Convective Rain Volumes over Areas Applied to Satellite Data—A Preliminary Investigation  

Science Conference Proceedings (OSTI)

Early work attempting to apply GOES rapid scan satellite data to a recently developed simple radar technique used to estimate convective rain volumes over areas in a semiarid environment (the northern Great Plains) is described.

AndréA. Doneaud; James R. Miller Jr.; L. Ronald Johnson; Thomas H. Vonder Haar; Patrick Laybe

1987-01-01T23:59:59.000Z

485

The Numerical Simulation of Clouds, Rains and Airflow over the Vosges and Black Forest Mountains: A Meso-? Model with Parameterized Microphysics  

Science Conference Proceedings (OSTI)

A three-dimensional meso-? model with parameterized microphysics is presented. The model is capable of simulating orographically forced clouds, rain, and airflow. Tests using a two-dimensional version confirm the ability of the model to replicate ...

Everett C. Nickerson; Evelyne Richard; Robert Rosset; David R. Smith

1986-02-01T23:59:59.000Z

486

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

Science Conference Proceedings (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

487

The Challenge of Forecasting Heavy Rain and Flooding throughout the Eastern Region of the National Weather Service. Part II: Forecast Techniques and Applications  

Science Conference Proceedings (OSTI)

Over the years, as the recognition and understanding of the structure and climatic frequency of heavy-rain events has expanded, there has been a corresponding improvement in the available forecast guidance on both the national and local level. ...

Harold H. Opitz; Solomon G. Summer; David A. Wert; Warren R. Snyder; Richard J. Kane; Raymond H. Brady; Paul M. Stokols; Stephan C. Kuhl; Gary M. Carter

1995-03-01T23:59:59.000Z

488

Spatial and Microphysical Characteristics of Low-Ceiling, Temperature-Inverted Clouds in Warm Overrunning and Freezing-Rain Conditions: A Case Study  

Science Conference Proceedings (OSTI)

In-flight microphysical measurements in classical freezing-rain conditions were used to study the vertical and horizontal characteristics of the precipitation and associated low-ceiling, stratiform clouds, which are usually present as overcast in ...

Richard K. Jeck

2011-10-01T23:59:59.000Z

489

Dynamics of coronal rain and descending plasma blobs in solar prominences: I. Fully ionised case  

E-Print Network (OSTI)

Observations of active regions and limb prominences often show cold, dense blobs descending with an acceleration smaller than that of free fall. The dynamics of these condensations falling in the solar corona is investigated in this paper using a simple fully ionised plasma model. We find that the presence of a heavy condensation gives rise to a dynamical rearrangement of the coronal pressure that results in the formation of a large pressure gradient that opposes gravity. Eventually this pressure gradient becomes so large that the blob acceleration vanishes or even points upwards. Then, the blob descent is characterised by an initial acceleration phase followed by an essentially constant velocity phase. These two stages can be identified in published time-distance diagrams of coronal rain events. Both the duration of the first stage and the velocity attained by the blob increase for larger values of the ratio of blob to coronal density, for larger blob mass, and for smaller coronal temperature. Dense blobs ar...

Oliver, R; Terradas, J; Zaqarashvili, T V; Khodachenko, M L

2013-01-01T23:59:59.000Z

490

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

DOE Green Energy (OSTI)

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

491

Interpreting Dirac variables in terms of the Hilbert space of gauge-invariant and Poincare-covariant states  

E-Print Network (OSTI)

The goal of this note is to give a description of Dirac variables in Abelian as well as non-Abelian gauge models in terms of gauge-invariant and Poincare-covariant states sweeping a Hilbert space ${\\cal H}_{\\rm vac}$. The next our conjecture concerns the spontaneous breakdown of the Abelian U(1) symmetry in the 'discrete' $U(1)\\to {\\bf Z}$ wise. We suppose that gauge charges are preserved in this case.

L. D Lantsman

2011-10-14T23:59:59.000Z

492

Gridded Hourly Precipitation Analysis from High-Density Rain Gauge Network over the Yangtze–Huai Rivers Basin during the 2007 Mei-Yu Season and Comparison with CMORPH  

Science Conference Proceedings (OSTI)

Heavy rainfall hit the Yangtze–Huai Rivers basin (YHRB) of east China several times during the prolonged 2007 mei-yu season, causing the worst flood since 1954. There has been an urgent need for attaining and processing high-quality, kilometer-...

Yali Luo; Weimiao Qian; Renhe Zhang; Da-Lin Zhang

2013-08-01T23:59:59.000Z

493

A 125GeV Higgs Boson and Muon g-2 in More Generic Gauge Mediation  

E-Print Network (OSTI)

Recently, the ATLAS and CMS collaborations reported exciting hints of a Standard Model-like Higgs boson with a mass around 125GeV. A Higgs boson this heavy is difficult to realize in conventional models of gauge mediation. Here we revisit the lightest Higgs boson mass in "more generic gauge mediation," where the Higgs doublets mix with the messenger doublets. We show that a Higgs boson mass around 125GeV can be realized in more generic gauge mediation models, even for a relatively light gluino mass ~1TeV. We also show that the muon anomalous magnetic moment can be within 1sigma of the experimental value for these models, even when the Higgs boson is relatively heavy. We also discuss the LHC constraints and the prospects of discovery.

Evans, Jason L; Shirai, Satoshi; Yanagida, Tsutomu T

2012-01-01T23:59:59.000Z

494

Topological gauge theories from supersymmetric quantum mechanics on spaces of connections  

E-Print Network (OSTI)

We rederive the recently introduced $N=2$ topological gauge theories, representing the Euler characteristic of moduli spaces ${\\cal M}$ of connections, from supersymmetric quantum mechanics on the infinite dimensional spaces ${\\cal A}/{\\cal G}$ of gauge orbits. To that end we discuss variants of ordinary supersymmetric quantum mechanics which have meaningful extensions to infinite-dimensional target spaces and introduce supersymmetric quantum mechanics actions modelling the Riemannian geometry of submersions and embeddings, relevant to the projections ${\\cal A}\\rightarrow {\\cal A}/{\\cal G}$ and inclusions ${\\cal M}\\subset{\\cal A}/{\\cal G}$ respectively. We explain the relation between Donaldson theory and the gauge theory of flat connections in $3d$ and illustrate the general construction by other $2d$ and $4d$ examples.

M Blau; G Thompson

1991-12-20T23:59:59.000Z

495

Gauge origin of M parity and the {mu} term in supersymmetry  

SciTech Connect

In this article, we present a simple theoretical framework where the origin of the {mu} term and the matter-parity-violating interactions of the minimal supersymmetric standard model can be understood from the spontaneous breaking of new Abelian gauge symmetries. In this context, the masses of the Z{sup '} gauge bosons, the M-parity-violating scale and the {mu} term are determined by the supersymmetry breaking scale. The full spectrum of the theory is discussed in detail. We investigate the predictions for the Higgs masses in detail showing that it is possible to satisfy the LEP2 bounds even with sub-TeV squark masses. The model predicts the existence of light colored fields, lepton- and baryon-number violation, and new neutral gauge bosons at the Large Hadron Collider.

Fileviez Perez, Pavel; Gonzalez-Alonso, Martin; Spinner, Sogee [Phenomenology Institute (PHENO), Department of Physics, University of Wisconsin-Madison, Wisconsin 53706 (United States); Center for Cosmology and Particle Physics (CCPP), Department of Physics, New York University, New York, 10003 (United States); Theoretical Nuclear, Particle, Astrophysics, and Cosmology (NPAC) Group, Department of Physics, University of Wisconsin-Madison, Wisconsin 53706 (United States); Phenomenology Institute (PHENO), Department of Physics, University of Wisconsin-Madison, Wisconsin 53706 (United States)

2011-11-01T23:59:59.000Z

496

Scaling properties of SU(2) gauge theory with mixed fundamental-adjoint action  

E-Print Network (OSTI)

We study the phase diagram of the SU(2) lattice gauge theory with fundamental-adjoint Wilson plaquette action. We confirm the presence of a first order bulk phase transition and we estimate the location of its end-point in the bare parameter space. If this point is second order, the theory is one of the simplest realizations of a lattice gauge theory admitting a continuum limit at finite bare couplings. All the relevant gauge observables are monitored in the vicinity of the fixed point with very good control over finite-size effects. The scaling properties of the low-lying glueball spectrum are studied while approaching the end-point in a controlled manner.

Enrico Rinaldi; Giuseppe Lacagnina; Biagio Lucini; Agostino Patella; Antonio Rago

2012-12-04T23:59:59.000Z

497

Method of determining the x-ray limit of an ion gauge  

DOE Patents (OSTI)

An ion gauge having a reduced "x-ray limit" and means for measuring that limit. The gauge comprises an ion gauge of the Bayard-Alpert type having a short collector and having means for varying the grid-collector voltage. The "x-ray limit" (i.e. the collector current resulting from x-rays striking the collector) may then be determined by the formula: ##EQU1## where: I.sub.x ="x-ray limit", I.sub.l and I.sub.h =the collector current at the lower and higher grid voltage respectively; and, .alpha.=the ratio of the collector current due to positive ions at the higher voltage to that at the lower voltage.

Edwards, Jr., David (Bellport, NY); Lanni, Christopher P. (Shirley, NY)

1981-01-01T23:59:59.000Z

498

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

499

Diphoton Decay Excess and 125 GeV Higgs Boson in Gauge-Higgs Unification  

E-Print Network (OSTI)

In the context of gauge-Higgs unification scenario in a 5-dimensional flat spacetime, we investigate Higgs boson production via gluon fusion and its diphoton decay mode at the LHC. We show that the signal strength of the Higgs diphoton decay mode observed at ATLAS and CMS, which is considerably larger than the Standard Model expectation, can be explained by a simple gauge-Higgs unification model with color-singlet bulk fermions to which a half-periodic boundary condition is assigned. The bulk fermions also play a crucial role in reproducing the observed Higgs boson mass around 125 GeV.

Nobuhito Maru; Nobuchika Okada

2013-03-23T23:59:59.000Z

500

A confirmation of agreement of different approaches for scalar gauge-invariant metric perturbations during inflation  

E-Print Network (OSTI)

We revisit an extension of the well-known formalism for gauge-invariant scalar metric fluctuations, to study the spectrums for both, the inflaton and gauge invariant (scalar) metric fluctuations in the framework of a single field inflationary model where the quasi-exponential expansion is driven by an inflation which is minimally coupled to gravity. The proposal here examined is valid also for fluctuations with large amplitude, but for cosmological scales, where vector and tensor perturbations can be neglected and the fluid is irrotacional.

Mariano Anabitarte; Mauricio Bellini

2008-09-30T23:59:59.000Z