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1

PDF Document (387k)  

U.S. Energy Information Administration (EIA) Indexed Site

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2

Mercury bioaccumulation in Lavaca Bay, Texas  

E-Print Network [OSTI]

MERCURY BIOACCUMULATION IN LAVACA BAY, TEXAS A Thesis by SALLY JO PALMER Submitted to the Office of Graduate Studies of Texas ABM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1992 Major... Subject: Oceanography MERCURY BIOACCUMULATION IN LAVACA BAY, TEXAS A Thesis by SALLY JO PALMER Approved as to style and content by: obby J. Pr y (Chair of Committee) Robe J. Tayl (Member) owell (Member) Marvin W. Rowe (Member) Gi bert T. Rowe...

Palmer, Sally Jo

2012-06-07T23:59:59.000Z

3

EIS-0494: Excelerate Liquefaction Solutions Lavaca Bay LNG Project, Calhoun  

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

4: Excelerate Liquefaction Solutions Lavaca Bay LNG Project, 4: Excelerate Liquefaction Solutions Lavaca Bay LNG Project, Calhoun and Jackson Counties, Texas EIS-0494: Excelerate Liquefaction Solutions Lavaca Bay LNG Project, Calhoun and Jackson Counties, Texas SUMMARY The Federal Energy Regulatory Commission (FERC) is preparing, with DOE as a cooperating agency, an EIS to analyze the potential environmental impacts of a proposal to construct and operate a liquefied natural gas terminal consisting of two floating liquefaction, storage and offloading units and a 29-mile pipeline header system to transport natural gas from existing pipeline systems to the LNG terminal facilities. PUBLIC COMMENT OPPORTUNITIES None at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD March 12, 2013 EIS-0494: Notice of Intent to Prepare an Environmental Impact Statement

4

Acoustic characteristics of bay bottom sediments in Lavaca Bay, TX  

E-Print Network [OSTI]

METHODS An Edgetech X-Star chirp sonar was used to gather subbottom acoustic profile data from Lavaca Bay. The sonar fish was towed on a short line next to the side of the boat, about 0.5 m below the water surface. The data were recorded onto 4 mm... middle Lavaca Bay (just above Chocolate Bay) and Keller bay, which have lines running southwest to northeast (Fig. 1). The subbottom data were plotted and examined on a computer using SonarWeb, a seismic processing program from Chesapeake...

Patch, Mary Catherine

2005-08-29T23:59:59.000Z

5

Lavaca County, Texas: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Lavaca County, Texas: Energy Resources Lavaca County, Texas: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 29.3359054°, -96.8350999° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":29.3359054,"lon":-96.8350999,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

6

Study of sediment resuspension due to Hurricane Carla in Lavaca Bay, Texas  

E-Print Network [OSTI]

STUDY OF SEDIMENT RESUSPENSION DUE TO IIURIGCANE CARLA IN LAVACA BAY, TEXAS A Thesis by KATHERINE LARM Submitted to the Office of Graduate Studies of Texas A &M University in partial fulfillment of the requirements for the degree of MASTER... Resuspension Due to Hurricane Carla in Lavaca Bay, Texas. (May 1998) Katherine Larm, B. S. , Columbia University Chair of Advisory Committee: Dr. Billy L. Edge Sediments are suspended and mobilized by wave-induced fluid motion and currents in the coastal...

Larm, Katherine, Dd 1970-

1998-01-01T23:59:59.000Z

7

Speciation and cycling of mercury in Lavaca Bay, Texas, sediments  

SciTech Connect (OSTI)

Sediment depth profiles of total mercury (THg) and monomethylmercury (MMHg) were collected at 15 sites in an anthropogenically contaminated estuarine system (Lavaca Bay, TX). THg in the solid phase increased with depth to a maximum located at 10--30 cm, which corresponds to historic industrial discharges to the bay. MMHg in the solid phase was highest in the upper 0--3 cm of the cores, decreasing rapidly with depth. The MMHg content of the surface sediment was a narrowly constrained fraction of the total over a range of sediment types, while making up only 0.01--0.05% of THg at depth. Porewater concentrations exhibited trends similar to but more exaggerated than in the solid phase. The distribution coefficients (log K{sub d}) for inorganic Hg were similar in most samples, averaging 4.89 {+-} 0.43. The log K{sub d} for MMHg averaged 2.70 {+-} 0.78 over all sites and depths but exhibited a subsurface minimum of 2.29 {+-} 0.67 at the point of maximum dissolved Fe. A time series showed a maximum in both solid phase and porewater MMHg during the early spring, followed by a decrease throughout the remainder of the year.

Bloom, N.S. [Frontier Geosciences Inc., Seattle, WA (United States)] [Frontier Geosciences Inc., Seattle, WA (United States); Gill, G.A. [Texas A and M Univ., Galveston, TX (United States). Dept. of Oceanography] [Texas A and M Univ., Galveston, TX (United States). Dept. of Oceanography; Cappellino, S. [Parametrix Inc., Houston, TX (United States)] [Parametrix Inc., Houston, TX (United States); Dobbs, C.; Mcshea, L. [Aluminum Co. of America, Point Comfort, TX (United States)] [Aluminum Co. of America, Point Comfort, TX (United States); Driscoll, C. [Syracuse Univ., NY (United States). Dept. of Civil and Environmental Engineering] [Syracuse Univ., NY (United States). Dept. of Civil and Environmental Engineering; Mason, R. [Univ. of Maryland, Solomons, MD (United States). Chesapeake Bay Lab.] [Univ. of Maryland, Solomons, MD (United States). Chesapeake Bay Lab.; Rudd, J. [Freshwater Inst., Winnipeg, Manitoba (Canada). Dept. of Fisheries and Oceans] [Freshwater Inst., Winnipeg, Manitoba (Canada). Dept. of Fisheries and Oceans

1999-01-01T23:59:59.000Z

8

Sediment-water fluxes of mercury in Lavaca Bay, Texas  

SciTech Connect (OSTI)

The aqueous flux of inorganic Hg and monomethyl Hg from sediments to the water column was determined at several sites in Lavaca Bay, an estuary along the Texas Coast, historically impacted by Hg discharges. Diffusive fluxes were calculated at 15 sites using interstitial pore water gradients and compared to direct flux measurements obtained at two sites using benthic flux chambers. The diffusive flux of monomethyl mercury (MMHg), when modeled as a chloride species, varied over 3 orders /of magnitude from 0.2 to 1500 ng m{sup {minus}2} day{sup {minus}1}. Diffusive fluxes determined at a single site revealed that MMHg fluxes varied seasonally; maximal fluxes occurred in late winter to early spring. Flux chamber deployments at an impacted site revealed t hat MMHg was the Hg species entering the water column from sediments and the flux was not in steady-state; there was a strong diurnal signal with most of the MMHg flux occurring during dark periods. The flux of inorganic Hg was smaller and not as easily discernible by this method. The MMHg flux during the dark period was about 6 times greater than the estimated diffusional flux for MMHgCl, suggesting that biological and/or chemical processes near the sediment-water interface were strongly mediating the sediment-water exchange of MMHg.

Gill, G.A. [Texas A and M Univ., Galveston, TX (United States)] [Texas A and M Univ., Galveston, TX (United States); Bloom, N.S. [Frontier Geosciences Inc., Seattle, WA (United States)] [Frontier Geosciences Inc., Seattle, WA (United States); Cappellino, S. [Parametrix, Inc., Houston, TX (United States)] [Parametrix, Inc., Houston, TX (United States); Driscoll, C.T. [Syracuse Univ., NY (United States). Dept. of Civil and Environmental Engineering] [Syracuse Univ., NY (United States). Dept. of Civil and Environmental Engineering; Dobbs, C.; McShea, L. [Aluminum Co. of America, Point Comfort, TX (United States)] [Aluminum Co. of America, Point Comfort, TX (United States); Mason, R. [Univ. of Maryland, Solomons, MD (United States). Chesapeake Biological Lab.] [Univ. of Maryland, Solomons, MD (United States). Chesapeake Biological Lab.; Rudd, J.W.M. [Dept. of Fisheries and Oceans, Winnipeg, Manitoba (Canada). Freshwater Inst.] [Dept. of Fisheries and Oceans, Winnipeg, Manitoba (Canada). Freshwater Inst.

1999-03-01T23:59:59.000Z

9

A Meta-analysis of Mercury Levels in Lavaca Bay Texas  

E-Print Network [OSTI]

A META-ANALYSIS OF MERCURY LEVELS IN LAVACA BAY TEXAS A Thesis by MARIA C. PILLADO Submitted to the Office of Graduate and Professional Studies of Texas A&M University and the Graduate Faculty of The Texas A&M University Corpus... Subject: Marine Biology Copyright 2014 Maria C. Pillado ...

Pillado, Cecilia Maria

2014-05-07T23:59:59.000Z

10

DeWitt County, Texas: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

DeWitt County, Texas: Energy Resources DeWitt County, Texas: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 29.1235194°, -97.3516558° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":29.1235194,"lon":-97.3516558,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

11

Dewitt C. Poole and America's intervention in Russia, 1918-1920  

E-Print Network [OSTI]

DEWITT C. POOLE AND AMERICA'S INTERVENTION IN RUSSIA, 1918 - 1920 A Thesis by CHARLES HARRY BRISCOE Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF ARTS May... 1972 Major Subject: History DEWITT C. POOLE AND AMERICA'S INTERVENTION IN RUSSIA, 1918 - 1920 A Thesis by CHARLES HARRY BRISCOE Approved as to style and content by: Chai n of Committee) (Member) ( ad of Department) (Member) May 1972 111...

Briscoe, Charles Harry

2012-06-07T23:59:59.000Z

12

Sediment transport and Hg recovery in Lavaca Bay, as evaluated from radionuclide and Hg distributions  

SciTech Connect (OSTI)

Mercury was released in the late 1960s from a chloralkali facility managed by ALCOA and deposited into sediments of Lavaca Bay, TX. Sediments have recorded this event as a well-defined subsurface concentration maximum. Radionuclide, mercury, X-radiography, and grain size data from sediment cores taken in 1997 at 15 stations in Lavaca bay were used to assess sediment and Hg movements in the bay. Sediment accumulation rates were calculated from bomb fallout nuclide ({sup 137}Cs, {sup 239,240}Pu) peaks in 1963 and from the steady-state delivery of {sup 210}Pb from the atmosphere. Sedimentation rates are highest at near-shore sites near the ALCOA facility and generally decrease away from shore. Sedimentation rates in some areas are likely influenced by anthropogenic activities such as dredging. Particle reworking, as assessed from {sup 7}Be measurements, is generally restricted to the upper 2--7 cm of sediments. Numerical simulations of Hg profiles using measured sedimentation and mixing parameters indicate that at most sites high remnant mercury concentrations at 15--60 cm depth cannot supply substantial amounts of Hg to surface sediments. Assuming no future Hg supplies, Hg concentrations in surface sediments are predicted to decrease exponentially with a recovery half-time of 4 {+-} 2 years.

Santschi, P.H.; Allison, M.A.; Asbill, S.; Perlet, A.B. [Texas A and M Univ., Galveston, TX (United States)] [Texas A and M Univ., Galveston, TX (United States); Cappellino, S. [Parametrix, Inc., Houston, TX (United States)] [Parametrix, Inc., Houston, TX (United States); Dobbs, C.; McShea, L. [Aluminum Co. of America, Point Comfort, TX (United States)] [Aluminum Co. of America, Point Comfort, TX (United States)

1999-02-01T23:59:59.000Z

13

The Wheeler - DeWitt Quantum Geometrodynamics: its fundamental problems and tendencies of their resolution  

E-Print Network [OSTI]

The paper is devoted to fundamental problems of the Wheeler - DeWitt quantum geometrodynamics, which was the first attempt to apply quantum principles to the Universe as a whole. Our purpose is to find out the origin of these problems and follow up their consequences. We start from Dirac generalized Hamiltonian dynamics as a cornerstone on which the Wheeler - DeWitt theory is based. We remind the main statements of the famous DeWitt's paper of 1967 and discuss the flaws of the theory: the well-known problem of time, the problem of Hilbert space and others. In the concluding part of the paper we consider new tendencies and approaches to quantum geometrodynamics appeared in the last decade.

T. P. Shestakova

2008-01-31T23:59:59.000Z

14

Nested Loops Revisited David J. DeWitt Je rey F. Naughton y  

E-Print Network [OSTI]

Nested Loops Revisited David J. DeWitt Je rey F. Naughton y Joseph Burger Abstract The research, almostnone ofthe commercialparallel database systems use hashing-based join algorithms, us- inginstead nested hash-based algorithms and a parallel nested loops algorithm with index. In this pa- per we present

Liblit, Ben

15

BORIS DEWITTE Born December 19, 1969 in Lille (France)  

E-Print Network [OSTI]

» STAR project (Partenariat Hubert Curien) (2011-2012) (P.I. with Pr. S.-W. Yeh (University of Hanyang in climate change projections » STAR project (Partenariat Hubert Curien) (2007- 2008) (P.I. with Pr. S Main participation to international programs « AMOP mooring, a deep mooring off Peru for the study

16

EIS-0494: Excelerate Liquefaction Solutions Lavaca Bay LNG Project, Calhoun and Jackson Counties, Texas  

Broader source: Energy.gov [DOE]

The Federal Energy Regulatory Commission (FERC) is preparing, with DOE as a cooperating agency, an EIS to analyze the potential environmental impacts of a proposal to construct and operate a liquefied natural gas terminal consisting of two floating liquefaction, storage and offloading units and a 29-mile pipeline header system to transport natural gas from existing pipeline systems to the LNG terminal facilities.

17

Exploring Hydrodynamic Modeling of Texas Bays With focus on Corpus Christi Bay & Lavaca Bay  

E-Print Network [OSTI]

evaporation data or data from which evaporation may be estimated are required. In order to estimate evaporation, ELCOM requires solar radiation data, water/air temperature data, wind speed data, cloud cover, and other geographically significant factors..., and this inflow has been demonstrated to be significant from the TxBLEND modeling. The inflow will be estimated from the USGS gauged riverflow on the Nueces river, minus estimated evaporation losses. Environmental Forcing Group #3 Exchange between Oso Bay...

Furnans, Jordan

2004-01-01T23:59:59.000Z

18

Floods in the Nueces, Guadalupe, Lavaca and Mission river basins: magnitude and frequency  

E-Print Network [OSTI]

APPENDIX B - TABULATION OF RECURRENCE INTERVALS 12 20 29 50 51 133 LIST OP TABLES Table Page 1 ~ Example of Data Prepared for hnalysls . . . ~ ~ . . . , . . . , , , 36 2 ~ Determination of Median Ratio Por Stations Numbers 1, 2, 6 and 10... of the Nueces River Basin ~ . . . . ? . . . . . . . . . . ~ . . . 41 3. Tabulation of Median Ratios for All Stations except Numbers 1, 2, 6 and 10 of the Nueces River Basin 4. Listing of Base Gaging Stations LIST Op PIQURES tigure Page I, Typical Plot...

Caffey, James Enoch

2012-06-07T23:59:59.000Z

19

The Chemical Composition of Some Soils of Angelina, Brazoria, Cameron, Cherokee, Delta, Lamar, Hidalgo, Lavaca, Montgomery, Nacogdoches, Robertson, Rusk, Webb and Wilson Counties.  

E-Print Network [OSTI]

. No. 970-Barton sandy loam (12"-36"), Bastrop, Texas. . No. 971-Houston loam ( 10"-36"), Bastrop, Texas. No. 1067-Susquehanna fine sandy loam (10"-36"), 2 miles north Bastrop, Texas. I *dMW00 cn at-001 04*,-2m l-i A*? . -. - - . -. 1 0 00mm...

Fraps, G. S. (George Stronach)

1909-01-01T23:59:59.000Z

20

Final Report - Hydrogen Delivery Infrastructure Options Analysis  

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

Markets", Agricultural Outlook Forum 2005, February 2005 37 Gebauer, M. M., and Jordan, J., (Dewitt & Company, Inc., Houston, Texas), "Methanol Market Distribution...

Note: This page contains sample records for the topic "dewitt kleberg lavaca" 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

Evaluation of four grasses for seeding on South Texas rangeland  

E-Print Network [OSTI]

annulatus Forsk cv. "Pretoria 90"), Gordo bluestem (Dicanthium aristatum (Poir. ) C. E. Hubb. cv. "Gordo"), King Ranch bluestem (Bothriochloa ishchaemum L. var. songaricus Rupr. ), Kleberg bluestem (Bothriochloa annulatus Forsk. ), Medio bluestem... (Dicanthium aristatum (Poir. ) C. E. Hubb. cv. "Medio" ), Higgins buffelgrass (Cenchrus ciliaris L. cv. "Higgins"), Wintergreen h dihgas kehlais~steet h k. ca. "ah t g e), d E 1 1 g (~Ett 1 lg h d. ) N NErmeloN). Selection cri teria included initial...

Polk, David Beck

2012-06-07T23:59:59.000Z

22

57. S. A. Bastin-Shanower, S. J. Brill, J. Biol. Chem. 276, 36446 (2001).  

E-Print Network [OSTI]

Mac- Chess, of the National Synchrotron Light Source X9A and X4A beamlines, and of the Argonne. This work was supported by the NIH, the Howard Hughes Medical Institute, the Dewitt Wallace Foundation

Morel, François M. M.

23

agesta reactor: Topics by E-print Network  

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

of a severe unprotected (more) DeWitte, Jacob D. (Jacob Dominic) 2011-01-01 16 Thermonuclear Reflect AB-Reactor Physics (arXiv) Summary: The author offers a new kind of...

24

Systematic delineation of Phymatotrichum root rot occurrence in cotton using remotely-sensed data  

E-Print Network [OSTI]

SYSTEMATIC DELINEATION OF PHYMATOTRICHUI'1 ROOT POT OCCURRENCE IN COTTON USING REMOTELY-SENSED DATA A Thesis by BRANDON DEWITT SMITH Submitted to the Graduate College of Texas A&M University in Partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE iiay 1979 Major Subject: P1ant Pathology SYSTEMATIC DELINEATION OF PHYMATOTRICHUM ROOT ROT OCCURRENCE IN COTTON USING REMOTELY-SENSED DATA A Thesis by BRANDON DEWITT SMITH Approved as to style and content by: hairman...

Smith, Brandon Dewitt

2012-06-07T23:59:59.000Z

25

Page not found | Department of Energy  

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

91 - 23600 of 31,917 results. 91 - 23600 of 31,917 results. Page EIS-0494: Excelerate Liquefaction Solutions Lavaca Bay LNG Project, Calhoun and Jackson Counties, Texas Notice of Intent: Scoping Period Ends 04/05/13 The Federal Energy Regulatory Commission (FERC) is preparing, with DOE as a cooperating agency, an EIS to analyze the potential environmental impacts of a proposal to construct and operate a liquefied natural gas terminal consisting of two floating liquefaction, storage and offloading units and a 29-mile pipeline header system to transport natural gas from existing pipeline systems to the LNG terminal facilities. http://energy.gov/nepa/eis-0494-excelerate-liquefaction-solutions-lavaca-bay-lng-project-calhoun-and-jackson-counties Page EIS-0226: Decommissioning and/or Long-Term Stewardship at the West

26

CX-004521: Categorical Exclusion Determination | Department of Energy  

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

21: Categorical Exclusion Determination 21: Categorical Exclusion Determination CX-004521: Categorical Exclusion Determination County of Travis, Texas 700 Lavaca Street Building Retrofit Project CX(s) Applied: B5.1 Date: 11/18/2010 Location(s): County of Travis, Texas Office(s): Energy Efficiency and Renewable Energy, Golden Field Office Energy Efficiency and Conservation Block Grant (EECBG). Travis County, Texas proposes to use $2 ,207,900 of EECBG funds for the following activity which is bounded by the signed statement of work and are therefore categorically excluded: 700 Lavaca Street Building Retrofit Project. DOCUMENT(S) AVAILABLE FOR DOWNLOAD CX-004521.pdf More Documents & Publications CX-002982: Categorical Exclusion Determination CX-002033: Categorical Exclusion Determination CX-001538

27

Producing Early-Maturity (Group IV) Soybeans on the Texas Gulf Coast  

E-Print Network [OSTI]

, to date, have commanded good prices in oil, feed, and export markets. Soybean acreage has increased in Victoria, Calhoun, Jackson, and Matagorda counties because of the crop?s low input costs. Selection: Adaption and Maturity Primarily Group IV and very... and Extension Specialists, Agronomy, The Texas A&M University System. Texas AgriLife Extension Service ? Zerle L. Carpenter, Director ? The Texas A&M University System ? College Station, Texas ARANSAS VICTORIA GOLIAD REFUGIO KARNES DE WITT LAVACA JACKSON MATA...

Klosterboer, Arlen; Miller, Travis; Livingston, Stephen

1996-04-11T23:59:59.000Z

28

An electromagnetic perpetuum mobile?  

E-Print Network [OSTI]

A charge moving freely in orbit around the Earth radiates according to Larmor's formula. If the path is closed, it would constitute a perpetuum mobile. The solution to this energy paradox is found in an article by C. M. DeWitt and B. DeWitt from 1964. The main point is that the equation of motion of a radiating charge is modified in curved spacetime. In the present article we explain the physics behind this modification, and use the generalized equation to solve the perpetuum mobile paradox.

yvind Grn; Sigurd Kirkevold Nss

2008-06-03T23:59:59.000Z

29

Vertical propagation of extratropical Rossby waves during the 19971998 El Nin~o off the west coast of South America  

E-Print Network [OSTI]

of South America in a medium-resolution OGCM simulation Marcel Ramos,1,2 Boris Dewitte,3 Oscar Pizarro,4 the west coast of South America in a medium-resolution OGCM simulation, J. Geophys. Res., 113, C08041, doi the subthermocline interannual variability in the eastern South Pacific. The focus is on isotherm vertical

30

Molecular evidence of Late Archean archaea and the presence of a subsurface hydrothermal biosphere  

Science Journals Connector (OSTI)

...kerogen during the continued heating of a thermally mature...batholiths; and in deep oil reservoirs of continental...370 : 285 287 . 41 Price LC DeWitt E ( 2001 ) Geochim...reached or passed the oil generation window. Sample Contamination and Oil Migration...

Gregory T. Ventura; Fabien Kenig; Christopher M. Reddy; Juergen Schieber; Glenn S. Frysinger; Robert K. Nelson; Etienne Dinel; Richard B. Gaines; Philippe Schaeffer

2007-01-01T23:59:59.000Z

31

University Graduate School Academic Bulletin  

E-Print Network [OSTI]

Hutchinson* Culbertson Chair of Writing John Schilb* Ruth N. Halls Professor Paul John Eakin* (Emeritus), Alvin H. Rosenfeld* (Jewish Studies), John Lincoln Schilb*, Murray Sperber* (Emeritus), Maura Frances- frey F. Huntsman* (Emeritus), Patricia Clare Ingham*, Joshua Kates*, DeWitt Douglas Kilgore*, Ivan

Indiana University

32

Query PreExecution and Batching in Paradise: ATwoPronged Approach to the Efficient Processing of  

E-Print Network [OSTI]

of Queries on Tape­Resident Raster Images 1 JieBing Yu David J. DeWitt Department of Computer Sciences­ structured organization for tape volumes. Second, the Paradise query processing engine was modified to in tape scheduling, and query batching. A per­ formance evaluation on a working prototype demon­ strates

Liblit, Ben

33

Query Pre-Execution and Batching in Paradise: A Two-Pronged Approach to the Efficient Processing of  

E-Print Network [OSTI]

of Queries on Tape-Resident Raster Images1 JieBing Yu David J. DeWitt Department of Computer Sciences-structured organization for tape volumes. Second, the Paradise query processing engine was modified to incorporate a number of novel mechanisms including query pre-execution, object abstraction, cache-conscious tape

Liblit, Ben

34

Coherences of accelerated detectors and the local character of the Unruh effect  

E-Print Network [OSTI]

We study the locality of the acceleration temperature in the Unruh effect. To this end, we develop a new formalism for the modeling of macroscopic irreversible detectors. In particular, the formalism allows for the derivation of the higher-order coherence functions, analogous to the ones employed in quantum optics, that encode temporal fluctuations and correlations in particle detection. We derive a causal and approximately local-in-time expression for an Unruh-Dewitt detector moving in a general path in Minkowski spacetime. Moreover, we derive the second-order coherence function for uniformly accelerated Unruh-Dewitt detectors. We find that the fluctuations in detection time for a single Unruh-Dewitt detector are thermal. However, the correlations in detection-time between two Unruh-Dewitt detectors with the same acceleration but separated by a finite distance are not thermal. This result suggests that the Unruh effect is fundamentally local, in the sense that the notion of acceleration temperature applies only to the properties of local field observables.

Charis Anastopoulos; Ntina Savvidou

2011-09-23T23:59:59.000Z

35

Introduction Aerial surveys from aircraft are a critical component of many environmental research,  

E-Print Network [OSTI]

. For localized surveys, small Unmanned Air Vehicles (UAVs) equipped with color and near infrared cameras accuracy assessment and improvement of detection probabilities. Autonomous Unmanned Aerial Vehicle (UAV) for Ecological Research Franklin Percival1 , Leonard Pearlstine2 , Bon Dewitt3 , Scot Smith3 , Adam Watts1

Mazzotti, Frank

36

SCIENTIFIC NOTES AND NEWS  

Science Journals Connector (OSTI)

...93, No. 2408 DR. LAWRENCE CRAwFoRD, professor of pure mathe-matics...Univer-sity of Michigan, has retired from active service. PROFESSOR...Dr. Dean DeWitt Lewis, who retired in 1939. DR. CHESTER ARTHUR...Association states that the new unit will be concerned with research...

1941-02-21T23:59:59.000Z

37

Clemson University Cooperative Extension Service Reportto the People  

E-Print Network [OSTI]

Laquasha Boyd did and she felt the energy and the rock'n of the stadium. GO TIGERS! Mission Statement ever seen. David DeWitt, Area Agriculture/ Row Crops Agent, spoke to some really old timers, not only with getting into the fields, but then how to manage the crop through very different from normal

Duchowski, Andrew T.

38

Arkansas SoyEnergy Group | Open Energy Information  

Open Energy Info (EERE)

SoyEnergy Group SoyEnergy Group Jump to: navigation, search Name Arkansas SoyEnergy Group Place DeWitt, Arkansas Zip 72042 Product Arkansas SoyEnergy Group is a soybean crushing and biodiesel production facility located in DeWitt, Arkansas. Coordinates 37.039998°, -77.642098° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":37.039998,"lon":-77.642098,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

39

What's Next for Nuclear Energy? MIT Students Discuss Path Forward |  

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

Next for Nuclear Energy? MIT Students Discuss Path Forward Next for Nuclear Energy? MIT Students Discuss Path Forward What's Next for Nuclear Energy? MIT Students Discuss Path Forward June 19, 2012 - 10:41am Addthis Dr. Peter Lyons, Assistant Secretary for Nuclear Energy met with students at MIT during an informal roundtable to talk what's next for nuclear energy and for the nuclear power industry. | Photo courtesy of Jake Dewitt. Dr. Peter Lyons, Assistant Secretary for Nuclear Energy met with students at MIT during an informal roundtable to talk what's next for nuclear energy and for the nuclear power industry. | Photo courtesy of Jake Dewitt. What does this project do? The Nuclear Energy University Program, has provided MIT and 78 other schools with $220 million in research grants and related support. Investing in the next generation isn't just about technology -- it's

40

What's Next for Nuclear Energy? MIT Students Discuss Path Forward |  

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

What's Next for Nuclear Energy? MIT Students Discuss Path Forward What's Next for Nuclear Energy? MIT Students Discuss Path Forward What's Next for Nuclear Energy? MIT Students Discuss Path Forward June 19, 2012 - 10:41am Addthis Dr. Peter Lyons, Assistant Secretary for Nuclear Energy met with students at MIT during an informal roundtable to talk what's next for nuclear energy and for the nuclear power industry. | Photo courtesy of Jake Dewitt. Dr. Peter Lyons, Assistant Secretary for Nuclear Energy met with students at MIT during an informal roundtable to talk what's next for nuclear energy and for the nuclear power industry. | Photo courtesy of Jake Dewitt. What does this project do? The Nuclear Energy University Program, has provided MIT and 78 other schools with $220 million in research grants and related support.

Note: This page contains sample records for the topic "dewitt kleberg lavaca" 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

Amer J of Potato Res (2006) 83:241-247 241 Beacon Chipper: A Round White Chip-Processing Potato Variety  

E-Print Network [OSTI]

Amer J of Potato Res (2006) 83:241-247 241 Beacon Chipper: A Round White Chip-Processing Potato,East Lansing,MI48824,USA 2Dept.of Plant Pathology,MichiganState University,East Lansing,MI48824,USA 3MichiganPotato Industry Commission,13109SchaveyRd, Ste 7, Dewitt,MI48820,USA 4MainePotato Board, 744MainSt.,Room1, Presque

Douches, David S.

42

Pond Scum  

E-Print Network [OSTI]

DeWitt, assistant professor of ecological genetics with the Department of Wildlife and Fisheries Sciences, and his colleagues recently discovered these ponds and set out to make educational and experimental use of them through the creation... of Wildlife and Fisheries Sciences to evaluate and measure natural selection factors, predator behavior and morphology, experimental foodweb manipula- tions, habitat structure and use, ecology, and several additional proposed research studies...

Crawford, Amanda

2005-01-01T23:59:59.000Z

43

EIS-0494: Notice of Intent to Prepare an Environmental Impact Statement |  

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

4: Notice of Intent to Prepare an Environmental Impact 4: Notice of Intent to Prepare an Environmental Impact Statement EIS-0494: Notice of Intent to Prepare an Environmental Impact Statement Excelerate Liquefaction Solutions Lavaca Bay LNG Project, Calhoun and Jackson Counties, Texas The Federal Energy Regulatory Commission (FERC) is preparing, with DOE as a cooperating agency, an EIS to analyze the potential environmental impacts of a proposal to construct and operate a liquefied natural gas terminal consisting of two floating liquefaction, storage and offloading units and a 29-mile pipeline header system to transport natural gas from existing pipeline systems to the LNG terminal facilities. EIS-0494-FERC-NOI-2013.pdf More Documents & Publications EIS-0491: Supplemental Notice of Intent to Prepare an Environmental Impact

44

Page not found | Department of Energy  

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

11 - 2020 of 26,777 results. 11 - 2020 of 26,777 results. Download EIS-0230: Final Environmental Statement Hermiston Power Project, Hermiston, Oregon http://energy.gov/nepa/downloads/eis-0230-final-environmental-statement Download EIS-0460: Final Environmental Impact Statement FutureGen 2.0 Project, Morgan County, Illinois http://energy.gov/nepa/downloads/eis-0460-final-environmental-impact-statement Download EA-1782: Avian and Bat Assessment Annual Report University of Delaware Lewes Campus Onsite Wind Energy Project http://energy.gov/nepa/downloads/ea-1782-avian-and-bat-assessment-annual-report Download EIS-0494: Notice of Intent to Prepare an Environmental Impact Statement Excelerate Liquefaction Solutions Lavaca Bay LNG Project, Calhoun and Jackson Counties, Texas http://energy.gov/nepa/downloads/eis-0494-notice-intent-prepare-environmental-impact-statement

45

Latest Documents and Notices | Department of Energy  

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

March 22, 2013 March 22, 2013 EIS-0408: EPA Notice of Availability of a Draft Programmatic Environmental Impact Statement Upper Great Plains Programmatic Wind EIS March 15, 2013 EIS-0472: DOE Notice of Availability of a Draft Programmatic Environmental Impact Statement Uranium Leasing Program, Mesa, Montrose, and San Miguel Counties, Colorado March 15, 2013 EIS-0472: EPA Notice of Availability of a Draft Programmatic Environmental Impact Statement Uranium Leasing Program, Mesa, Montrose, and San Miguel Counties, Colorado March 12, 2013 EIS-0494: Notice of Intent to Prepare an Environmental Impact Statement Excelerate Liquefaction Solutions Lavaca Bay LNG Project, Calhoun and Jackson Counties, Texas March 11, 2013 EIS-0451: Draft Environmental Impact Statement Hooper Springs Project, Caribou County, Idaho

46

Categorical Exclusion (CX) Determinations By Date | Department of Energy  

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

8, 2010 8, 2010 CX-004521: Categorical Exclusion Determination County of Travis, Texas 700 Lavaca Street Building Retrofit Project CX(s) Applied: B5.1 Date: 11/18/2010 Location(s): County of Travis, Texas Office(s): Energy Efficiency and Renewable Energy, Golden Field Office November 18, 2010 CX-004517: Categorical Exclusion Determination Ohio Energy Gateway Fund CX(s) Applied: B5.1 Date: 11/18/2010 Location(s): Ohio Office(s): Energy Efficiency and Renewable Energy, Golden Field Office November 18, 2010 CX-004495: Categorical Exclusion Determination Sustainable Algal Biofuels Consortium CX(s) Applied: B3.6 Date: 11/18/2010 Location(s): Arizona Office(s): Energy Efficiency and Renewable Energy, Golden Field Office November 18, 2010 CX-004485: Categorical Exclusion Determination

47

Page not found | Department of Energy  

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

81 - 3090 of 28,905 results. 81 - 3090 of 28,905 results. Page Community Renewable Energy Success Stories Webinar: Renewable Energy Parks (text version) Below is the text version of the webinar titled "Renewable Energy Parks," originally presented on March 19, 2013. http://energy.gov/eere/community-renewable-energy-success-stories-webinar-renewable-energy-parks-text-version Download Technical Standards Newsletter- September 2001 The Standards Forum and Standards Actions - September 2001 http://energy.gov/hss/downloads/technical-standards-newsletter-september-2001 Download EIS-0494: Notice of Intent to Prepare an Environmental Impact Statement Excelerate Liquefaction Solutions Lavaca Bay LNG Project, Calhoun and Jackson Counties, Texas http://energy.gov/nepa/downloads/eis-0494-notice-intent-prepare-environmental-impact-statement

48

U.S. DEPARTMENT OF ENERGY EERE PROJECT MANAGEMENT CENTER NEPA DETERMINATION  

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

." ,.~, ." ,.~, U.S. DEPARTMENT OF ENERGY EERE PROJECT MANAGEMENT CENTER NEPA DETERMINATION RECIPIENT:TRAVIS COUNTY TEXAS PROJECT TITLE: County of Travis, Texas 700 Lavaca Street Retrofit Project ARRA-EECBG (5) Page 1 of2 ~ '&. J "'*'1. P STATE: TX Funding Opportunity Announcement Number Pr~urement Instrument Number NEPA Control Number CIO Number 81 .128 DE-EE0000895 GF0-000089S-Q02 0 Based on my review orthe Information concerning the proposed action, as NEPA Compliance Officer (authorized under DOE Order 4Sl.IA), I have made the following determination: ex, EA, EIS APPENDIX AND NUMBER: Description: 85.1 Actions to conserve energy, demonstrate potential energy conservation, and promote energy-efficiency that do not increase the indoor concentrations of potentially harmful substances. These actions may involve finanda! and technical

49

Petrophysical properties and geology of selected intervals in the Frio Formation, Stratton field, South Texas for modeling interwell seismic logging response  

SciTech Connect (OSTI)

Seismic or continuity logging consists of locating a seismic source in one borehole near or in a low-velocity layer and deploying a detector array in a second borehole. Detection of guided waves transmitted between the two wells indicates bed connectivity. The guided wave signatures are either leaky modes or normal modes (or both). The technique has numerous applications in various types of heterogeneous geological environments, including many Gulf Coast gas reservoirs. It can be used to determine the continuity of beds between wells, estimate and locate variations in the thickness of beds, and estimate the average rock physical properties of the beds. Stratton field was selected as the Gulf-Coast-gas-play type field for a project to model interwell seismic logging responses. Stratton is a mature gas field located in the south Texas Gulf Coast, about 30 miles southwest of Corpus Christi. It encompasses over 120,000 acres in portions of Kleberg, Nueces, and Jim Wells counties. Stratton is one of 29 fields in the Frio Formation fluvial-deltaic lay associated with the Vicksburg fault zone along the Texas Gulf Coast Basin. This poster presentation explains the technique of interwell seismic logging, documents the petrophysical properties and geology of intervals in the upper and middle Frio, and presents the results of the forward modeling tests.

Collier, H.A. [Tarleton State Univ., Stephenville, TX (United States); Parra, J.O. [Southwest Research Inst., San Antonio, TX (United States)

1996-09-01T23:59:59.000Z

50

Dielectronic Recombination Cross-Sections of Fluorinelike Xenon  

E-Print Network [OSTI]

. E. Marrs, M. A. Levine, C. L. Bennett, M. H. Chen, J. R. Henderson, M. B. Schneider, and J. H. Scofield, Phys. Rev. Lett. 62, 2104 (1989). [4] R. Ali, C. P. Bhalla, C. L. Cocke, M. Schulz, and M. Stockli, Phys. Rev. A 44, 223 (1991);R. Ali, C. P... (1991). [8] D. R. DeWitt, D. Schneider, M. H. Chen, M. W. Clark, J. W. McDonald, and M. B. Schneider, Phys. Rev. Lett. 68, 1694 (1992). [9] M. H. Chen, Phys. Rev. A 31, 1449 (1985);33, 994 (1986). [10] I. P. Grant, B. J. McKenzie, P. H. Norrington...

Dewitt, D. R.; Schneider, D.; Chen, M. H.; Schneider, M. B.; Church, David A.; Weinberg, G.; Sakurai, M.

1993-01-01T23:59:59.000Z

51

"Instantaneous superluminality" in a bimetallic wire consisting of a superconducting aluminum wire plated with a thick copper covering  

E-Print Network [OSTI]

Maxwell's equations applied to a superconducting wire (aluminum) covered with a thick nonsuperconducting sheath (copper), in combination with the superfluid velocity equation for Cooper pairs which obeys DeWitt's minimal coupling rule, implies an instantaneous streamline flow that leads to the phenomenon of "instantaneous superluminality," in which a Cooper pair can disappear from the left end of the wire and instantaneously reappear at the right end of the wire. Relativistic causality is not violated by this superluminal phenomenon, which involves analytic, finite bandwidth waveforms whose spectrum lies below the BCS gap frequency. Experiments are proposed to test these ideas.

R. Y. Chiao

2010-11-14T23:59:59.000Z

52

NETL F 451.1/1-1, Categorical Exclusion Designation Form  

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

AC26-07NT42677 AC26-07NT42677 RPSEA FE Multiple SCNGO FY13-16/36 months Gary Covatch Multiple sites, Multiple states Technology Integration Program - Field Trial Site Two - Eagle Ford Shale, DeWitt County, Texas SUMMARY CX to cover air emissions measurements, water quality screening, soil/livestock impact analysis, invasive species survey, community/public studies, documentation, and off-site lab work. Gary L. Covatch Digitally signed by Gary L. Covatch DN: cn=Gary L. Covatch, o=NETL, ou=SCNGO, email=gary.covatch@netl.doe.gov, c=US Date: 2013.06.17 09:27:21 -04'00' 06 17 2013 John Ganz Digitally signed by John Ganz DN: cn=John Ganz, o=NETL, ou=ECD, email=john.ganz@netl.doe.gov, c=US Date: 2013.06.19 13:42:11 -04'00' 6 19 2013 Summary CX covers field activities in DeWitt County, TX and lab-scale work in College Station, TX,

53

One-Way Speed of Light Measurements Without Clock Synchronisation  

E-Print Network [OSTI]

The 1991 DeWitte double one-way 1st order in v/c experiment successfully measured the anisotropy of the speed of light using clocks at each end of the RF coaxial cables. However Spavieri et al., Physics Letters A (2012), doi: 10.1016/j.physleta_2012.0010, have reported that (i) clock effects caused by clock transport should be included, and (ii) that this additional effect cancels the one-way light speed timing effect, implying that one-way light speed experiments "do not actually lead to the measurement of the one-way speed of light or determination of the absolute velocity of the preferred frame". Here we explain that the Spavieri et al. derivation makes an assumption that is not always valid: that the propagation is subject to the usual Fresnel drag effect, which is not the case for RF coaxial cables. As well DeWitte did take account of the clock transport effect. The Spavieri et al. paper has prompted this clarification of these issues.

Reginald T. Cahill

2012-06-04T23:59:59.000Z

54

Comparison of test specific sediment effect concentrations with marine sediment quality assessment guidelines  

SciTech Connect (OSTI)

As part of NOAA`s National Status and Trends (NS and T) Bioeffects Assessment program and studies conducted by the National Biological Service, numerous sediment quality assessment surveys have recently been conducted along the Atlantic and Gulf coasts of the US using the sea urchin (Arbacia punctulata) fertilization and embryological development tests with pore water. Additional toxicity tests were also conducted in conjunction with most of these studies. The areas that have been sampled include Boston harbor, Massachusetts; Charleston Harbor, Winyah Bay, and Savannah River, South Carolina; St. Simon Sound, Georgia; Biscayne Bay, Tampa Bay, Choctawhatchee Bay, Apalachicola Bay, St. Andrew Bay, and Pensacola Bay, Florida; Galveston Bay, Lavaca Bay, and Sabine Lake, Texas, and 200 stations in the vicinity of offshore oil and gas production platforms in the Gulf of Mexico. Sufficient data are now available from this series of surveys to calculate test specific sediment effect concentrations (SECs). Based on these recent studies, SECs were developed for the sea urchin porewater and amphipod tests and compared with existing marine sediment quality assessment guidelines.

Carr, R.S.; Biedenbach, J.M. [National Biological Service, Corpus Christi, TX (United States). Marine Ecotoxicology Research Station; Long, E.R. [NOAA, Seattle, WA (United States); MacDonald, D.D. [MacDonald Environmental Sciences Ltd., Ladysmith, British Columbia (Canada)

1995-12-31T23:59:59.000Z

55

Student and Recent Graduate Contacts | Department of Energy  

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

Student and Recent Student and Recent Graduate Contacts Student and Recent Graduate Contacts Contact a recruiter today for additional information as it pertains to a specific job opportunity or to inquire about the hiring process. To help you in this area: Know the position OR Know the geographic location where you would like to apply LIST OF RECRUITMENT LIAISONS DOE Headquarters Jobs in: Washington, DC Olivia DeWitt (Primary); 202-586-9843; Olivia.DeWitt@hq.doe.gov Ina Coates (Alternate); 202-586-6118; Ina.Coates@hq.doe.gov EM/Consolidate Business Center (EMCBC) Jobs in: Cincinnati, OH; Lexington, KY Regina Neal: 513-246-0495; Regina.Neal@emcbc.doe.gov Bruce Wynn: 513-246-0480; Bruce.Wynn@@emcbc.doe.gov Richland Operations Office Jobs in: Richland, WA Linda Yorgensen: (509) 376-3610; Linda.yorgensen@rl.doe.gov

56

Research Highlight  

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

Data from Saharan Dust Storm Reveal Model Deficiencies Data from Saharan Dust Storm Reveal Model Deficiencies Submitter: McFarlane, S. A., U.S. Department of Energy Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Slingo, A., T.P. Ackerman, R.P. Allan, E.I. Kassianov, S.A. McFarlane, G.J. Robinson, J.C. Barnard, M.A. Miller, J.E. Harries, J.E. Russell , S. Dewitte, 2006: Observations of the impact of a major Saharan dust storm on the Earth's radiation budget. Geophys. Res. Lett., 33, L24817, doi:10.1029/2006GL027869. In March 2006, the ARM Mobile Facility recorded the strongest Saharan dust storm to reach the Niamey area in two years. The storm lasted several days, and visibility was reduced to 15 percent of normal. Observations (solid lines and star symbols) and results from two models

57

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

E-Print Network [OSTI]

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

T. P. Shestakova

2008-01-30T23:59:59.000Z

58

Quantum geometrodynamics creates new problems  

E-Print Network [OSTI]

The development of last years in quantum geometrodynamics highlights new problems which were not obvious in its first formulation proposed by Wheeler and DeWitt. At the first stage the main task was to apply known quantization schemes to gravitational field or a certain cosmological model. This way has led to the realization of the fact that a quantum description of the Universe is impossible without implicit or explicit indication to a reference frame presented by some medium, filling the whole Universe, with its own equation of state and thermodynamical properties. Thus the questions arise, should one seek for a "privileged" reference frame or consider all the variety of gauge conditions and appropriate solutions for the wave function? It is worth noting that thermodynamical properties of such a quantum Universe would also depend on a chosen reference frame to some extent. So, we need a self-consistent quantum theoretical and thermodynamical description of the Universe.

T. P. Shestakova

2008-10-22T23:59:59.000Z

59

A Spinor Model for Quantum Cosmology  

E-Print Network [OSTI]

The question of the interpretation of Wheeler-DeWitt solutions in the context of cosmological models is addressed by implementing the Hamiltonian constraint as a spinor wave equation in minisuperspace. We offer a relative probability interpretation based on a non-closed vector current in this space and a prescription for a parametrisation of classical solutions in terms of classical time. Such a prescription can accommodate classically degenerate metrics describing manifolds with signature change. The relative probability density, defined in terms of a Killing vector of the Dewitt metric on minisuperspace, should permit one to identify classical loci corresponding to geometries for a classical manifold. This interpretation is illustrated in the context of a quantum cosmology model for two-dimensional dilaton gravity.

T Dereli; M Onder; R W Tucker

1994-03-02T23:59:59.000Z

60

Grounds for Quantum Geometrodynamics in an extended phase space and its cosmological consequences  

E-Print Network [OSTI]

Quantum geometrodynamics (QGD) in extended phase space essentially distinguished from the Wheeler - DeWitt QGD is proposed. The grounds for constructing a new version of quantum geometrodynamics are briefly discussed. The main part in the proposed version of QGD is given to the Schrodinger equation for a wave function of the Universe. The Schrodinger equation carries information about a chosen gauge condition which fixes a reference system. The reference system is represented by a continual medium that can be called ``the gravitational vacuum condencate". A solution to the Schrodinger equation contains information about the integrated system ``a physical object + observation means (the gravitational vacuum condensate)". It may be demonstrated that the gravitational vacuum condensate appears to be a cosmological evolution factor.

T. P. Shestakova

2000-06-29T23:59:59.000Z

Note: This page contains sample records for the topic "dewitt kleberg lavaca" 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

Combining NASA/JPL One-Way Optical-Fiber Light-Speed Data with Spacecraft Earth-Flyby Doppler-Shift Data to Characterise 3-Space Flow  

E-Print Network [OSTI]

We combine data from two high precision NASA/JPL experiments: (i) the one-way speed of light experiment using optical fibers: Krisher T.P., Maleki L., Lutes G.F., Primas L.E., Logan R.T., Anderson J.D. and Will C.M., Phys. Rev. D, vol 42, 731-734, 1990, and (ii) the spacecraft earth-flyby doppler shift data: Anderson J.D., Campbell J.K., Ekelund J.E., Ellis J. and Jordan J.F., Phys. Rev. Lett., vol 100, 091102, 2008, to give the solar-system galactic 3-space average speed of 486km/s in the direction RA=4.29hrs, Dec=-75.0deg. Turbulence effects (gravitational waves) are also evident. Data also reveals the 30km/s orbital speed of the earth and the sun inflow component at 1AU of 42km/s and also 615km/s near the sun, and for the first time, experimental measurement of the 3-space 11.2km/s inflow of the earth. The NASA/JPL data is in remarkable agreement with that determined in other light speed anisotropy experiments, such as Michelson-Morley (1887), Miller (1933), Torr and Kolen (1981), DeWitte (1991), Cahill (2006), Munera (2007), Cahill and Stokes (2008) and Cahill (2009).

Reginald T Cahill

2009-06-30T23:59:59.000Z

62

Hamiltonian formulation of General Relativity 50 years after the Dirac celebrated paper: do unsolved problems still exist?  

E-Print Network [OSTI]

About 50 years ago, in 1958, Dirac published his formulation of generalized Hamiltonian dynamics for gravitation. Several years later Arnowitt, Deser and Misner (ADM) proposed their description of the dynamics of General Relativity which became a basis of the Wheeler - DeWitt Quantum Geometrodynamics. There exist also other works where the Hamiltonian formulation of gravitational theory was discussed. In spite of decades passed from the famous papers by Dirac and ADM, there are unsolved problems. Namely, are the Dirac and ADM formulations equivalent to each other? Are these formulations equivalent to the original (Lagrangian) Einstein theory? Is the group of transformation in phase space the same as the group of gauge transformation of the Einstein theory? What are rules according to which a generator of transformations in phase space should be constructed? Let us mention also another approach based on extended phase space where gauge degrees of freedom are treated on the equal ground with physical degrees of freedom. Our purpose is to review the above questions and to demonstrate advantages of the extended phase space approach by the example of a simple model with finite number degrees of freedom.

T. P. Shestakova

2010-01-25T23:59:59.000Z

63

The formulation of General Relativity in extended phase space as a way to its quantization  

E-Print Network [OSTI]

Our attempts to find an explanation for quantum behavior of the Early Universe appeal, as a rule, to the Wheeler - DeWitt Quantum Geometrodynamics which relies upon Hamiltonian formulation of General Relativity proposed by Arnowitt, Deser and Misner (ADM). In spite of the fact that the basic ideas of this approach were put forward about fifty years ago, even now we do not have clear understanding what Hamiltonian formulation of General Relativity must be. An evidence for it gives a recent paper by Kiriushcheva and Kuzmin [arXiv:0809.0097], where the authors claim that the formulation by ADM and that by Dirac made in his seminal work of 1958 are not equivalent. If so, we face the question what formalism should be chosen. Another problem is that we need a well-grounded procedure of constructing a generator of transformations in phase space for all gravitational variables including gauge ones. It suggests the notion of extended phase space. After analyzing the situation, we show that Hamiltonian formulation in extended phase space is a real alternative to Dirac and ADM formulations and can be constructed to be equivalent to the original (Lagrangian) formulation of General Relativity. Quantization in extended phase space is straightforward and leads to a new description of quantum Universe in which an essential place is given to gauge degrees of freedom.

T. P. Shestakova

2009-11-30T23:59:59.000Z

64

A view on the problems of Quantum Gravity  

E-Print Network [OSTI]

The existing approaches to quantization of gravity aim at giving quantum description of 3-geometry following to the ideas of the Wheeler -- DeWitt geometrodynamics. In this description the role of gauge gravitational degrees of freedom is missed. A probable alternative is to consider gravitational dynamics in extended phase space, taking into account the distinctions between General Relativity and other field theories. The formulation in extended phase space leads to some consequences at classical and quantum levels. At the classical level, it ensures that Hamiltonian dynamics is fully equivalent to Lagrangian dynamics, and the algebra of Poisson brackets is invariant under reparametrizations in a wide enough class including reparametrizations of gauge variables, meantime in the canonical Dirac approach the constraints' algebra is not invariant that creates problems with quantization. At the quantum level, the approach come to the description in which the observer can see various but complementary quantum gravitational phenomena in different reference frames that answers the spirit of General Relativity and Quantum Theory. Though until now the approach was applied to General Relativity in its original formulations, its implementation in different trends, including Quantum Loop Gravity or some other representations of gravitational variables, would also be of interest.

T. P. Shestakova

2011-11-09T23:59:59.000Z

65

The "extended phase space" approach to quantum geometrodynamics: what can it give for the development of quantum gravity?  

E-Print Network [OSTI]

The talk is devoted to the "extended phase space" approach to Quantum Geometrodynamics. The premises that have led to the formulation of this approach are briefly reviewed, namely, non-trivial topology of the Universe which implies the absence of asymptotic states, in contrast to situations one usually deals in ordinary quantum field theory; parametrization noninvariance in the Wheeler - DeWitt theory; the problem of time and the absence of dynamical evolution. Then we discuss the main features of the approach: Hamiltonian dynamics in extended phase space, gauge-dependent Schrodinger equation for the wave function of the Universe, the description of quantum Universe from the viewpoint of observers in a wide enough class of reference frames. After all, we analyse problems arising in this approach: the structure of Hilbert space in Quantum Geometrodynamics, the relations between solutions for the wave function of the Universe corresponding to various reference frames, properties of a medium to be necessary to fix a reference frame, the transition to classical limit.

T. P. Shestakova

2008-10-22T23:59:59.000Z

66

Cosmological solutions for the Universe filled with matter in various states and gauge invariance  

E-Print Network [OSTI]

We explore at phenomenological level a model of the Universe filled with various kinds of matter characterized by different equations of state. We show that introducing of each kind of matter is equivalent to a certain choice of a gauge condition, the gauge condition describing a medium with a given equation of state. The case of a particular interest is when one kind of matter (de Sitter false vacuum) dominates at the early stage of the Universe evolution while another kind (radiation, or ultrarelativistic gas) dominates at its later stage. We can, therefore, consider different asymptotic regimes for the early and later stages of the Universe existence. These regimes are described by solutions to the Wheeler - DeWitt equation for the Universe with matter in that given state, and, at the same time, in the "extended phase space" approach to quantum geometrodynamics the regimes are described by solutions to a Schrodinger equation associated with a choice of some gauge condition. It is supposed that, from the viewpoint of the observer located at the later stage of the Universe evolution, solutions for a Lambda-dominated early Universe would decay.

T. P. Shestakova

2006-05-11T23:59:59.000Z

67

Entanglement Entropy of the Early Universe in Generalized Chaplygin Gas Model  

E-Print Network [OSTI]

We provide an explicit calculation of the evolution of the cosmic entanglement entropy in the early universe before the matter dominant era. This is made possible by invoking the generalized Chaplygin gas (GCG) model, which has the advantage of preserving unitarity and providing a smooth transition between the inflation epoch and the radiation dominant era. The dynamics of the universe is described by the quantization in the minisuperspace of the GCG model, following the prescription proposed by Wheeler and DeWitt. Two sources of contribution to the cosmic entanglement entropy are considered: one from the homogeneous background where the observable and the unobservable regions of the universe are entangled and the other from the inhomogeneous cosmological perturbations where different modes are entangled. We find that the homogeneous contribution grows exponentially at the very beginning of the inflation, but decreases during the radiation dominant era. Conversely, that from the cosmological perturbation is found to decrease at first and then increase after reaching a minimum value. The net result is that the total entanglement entropy reaches a minimum at an early stage of the inflation and then increases throughout most of the inflation and the entire radiation dominant era.

Pisin Chen; Yuezhen Niu

2011-12-07T23:59:59.000Z

68

The dynamics of the early universe and the initial conditions for inflation in a model with radiation and a Chaplygin gas  

E-Print Network [OSTI]

The modeling of the early universe is done through the quantization of a Friedmann-Robertson-Walker model with positive curvature. The material content consists of two fluids: radiation and Chaplygin gas. The quantization of these models is made by following the Wheeler and DeWitt's prescriptions. Using the Schutz formalism, the time notion is recovered and the Wheeler-DeWitt equation transforms into a time dependent Schr\\"{o}dinger equation, which rules the dynamics of the early universe, under the action of an effective potential $V_{ef}$. Using a finite differences method and the Crank-Nicholson scheme, in a code implemented in the program OCTAVE, we solve the corresponding time dependent Schr\\"{o}dinger equation and obtain the time evolution of a initial wave packet. This wave packet satisfies appropriate boundary conditions. The calculation of the tunneling probabilities shows that the universe may emerge from the Planck era to an inflationary phase. It also shows that, the tunneling probability is a function of the mean energy of the initial wave packet and of two parameters related to the Chaplygin gas. We also show a comparison between these results and those obtained by the WKB approximation.

G. A. Monerat; G. Oliveira-Neto; E. V. Corra Silva; L. G. Ferreira Filho; P. Romildo Jr.; J. C. Fabris; R. Fracalossi; F. G. Alvarenga; S. V. B. Gonalves

2007-04-19T23:59:59.000Z

69

DEVELOPMENT OF A MUD-PULSE HIGH-TEMPERATURE MEASUREMENT-WHILE-DRILLING (MWD) SYSTEM  

SciTech Connect (OSTI)

The overall program objective is to develop a mud-pulse measurement-while-drilling (MWD) tool for oil and gas drilling operations that can be used where downhole temperatures are as high as 195 C (383 F). The work was planned to be completed in two phases: Phase I and an optional Phase II. The objectives of Phase I were first to identify critical components of existing MWD systems that can or cannot operate at 195 C. For components not able to meet the higher standard, one of several strategies was pursued: (1) locate high-temperature replacement components, (2) develop new designs that eliminate the unavailable components, or (3) use cooling to keep components at acceptable operating temperatures (under 195 C). New designs and components were then tested under high temperatures in the laboratory. The final goal of Phase I was to assemble two high-temperature MWD prototype tools and test each in at least one low-temperature well to verify total system performance. Phase II was also envisioned as part of this development. Its objective would be to test the two new high-temperature MWD prototype tools in wells being drilled in the United States where the bottom-hole temperatures were 195 C (or the highest temperatures attainable). The high-temperature MWD tool is designed to send directional and formation data to the surface via mud pulses, to aid in the drilling of guided wellbores. The modules that comprise the tool are housed in sealed barrels that protect the electronics from exposure to down-hole fluids and pressures. These pressure barrels are hung inside a non-magnetic collar located above the drilling assembly. A number of significant accomplishments were achieved during the course of the Phase I project, including: (1) Tested two MWD strings for function in an oven at 195 C; (2) Conducted field test of prototype 195 C MWD tool (at well temperatures up to 140-180 C); (3) Tested ELCON hybrid chip with processor, clock, and memory in a custom package for 700 hours at 200 C; (4) Contracted with APS Technology to conduct study of thermoelectric cooling of downhole electronics; (5) Conducted successful Peltier cooling test with APS Technology; (6) Tested and improved the electronics of Sperry Sun's Geiger Muller-based gamma detector for operation at 195 C; (7) Developed two high-temperature magnetometers (one in-house, one with Tensor); and (8) Encouraged outside source to develop lithium/magnesium high-temperature batteries (operating temperature of 125 to 215 C). One of this project's greatest achievements was improvement in Sperry Sun's current tool with changes made as a direct result of work performed under this project. These improvements have resulted in longer life and a more robust MWD tool at the previous temperature rating of 175 C, as well as at higher temperatures. A field test of two prototype 195 C MWD tools was conducted in Lavaca County, Texas. The purpose of this operation was to provide directional services on a sidetrack of a straight hole. The sidetrack was to intersect the formation up-dip above the water/gas interface. In addition, the gamma tool provided formation data including seam tops and thickness. Results from these field tests indicate progress in the development of a 195 C tool. Although the pulsers failed downhole in both tools, failure of the pulsers was determined to be from mechanical rather than electrical causes. Analysis of the economics of the 195 C tool highlights the greatest obstacle to future commercialization. Costs to screen individual components, then subassemblies, and finally completed tools for high-temperature operations are very high. Tests to date also show a relatively short life for high-temperature tools--on the order of 300 hours. These factors mean that the daily cost of the tool will be higher (3 to 5 times more) than a conventional tool.

John H. Cohen; Greg Deskins; William Motion; Jay Martin

2002-01-01T23:59:59.000Z