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

Scholte waves generated by seafloor topography  

E-Print Network [OSTI]

Seafloor topography can excite strong interface waves called Scholte waves that are often dispersive and characterized by slow propagation but large amplitude. This type of wave can be used to invert for near seafloor shear ...

Zheng, Yingcai

2012-01-01T23:59:59.000Z

2

Numerical Modeling of Seafloor Interation with Steel Catenary Riser  

E-Print Network [OSTI]

captured through comparison with previous experimental tests carried out at the Centre for Offshore Foundation Systems (COFS) and Norwegian Geotechnical Institute (NGI). The analytical framework considers the riser-seafloor interaction problem in terms...

You, Jung Hwan

2012-10-19T23:59:59.000Z

3

The submerged offshore breakwater and its effects on seafloor topography  

E-Print Network [OSTI]

THE SUBMERGED OFFSHORE BREAKWATER AND ITS EFFECTS ON SEAFLOOR TOPOGRAPHY A Thesis by JAMES RUSSELL TALLENT Submitted to the Graduate College of Texas AGM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE December 19BG Major Subject: Civil Engineering THE SUBMERGEO OFFSHORE BREAKWATER AND ITS EFFECTS ON SEAFLOOR TOPOGRAPHY A Thesis by JAMES RUSSELL TALLENT Approved as to style and content by: John B. Herbich (Chairman) Lauriston R. King...

Tallent, James Russell

2012-06-07T23:59:59.000Z

4

Microbial Life on the Seafloor: Where's the Energy?  

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

Microbial Life on the Seafloor: Where's the Microbial Life on the Seafloor: Where's the Energy? image 1 Pillow basalts on the side of the volcano. image 2 Pillow basalts from from inside the Pisces V. During the past 10 years there has been a growing recognition that the vast expanse of bare, unsedimented rocks on the seafloor harbor abundant and diverse microbial communities. Surprisingly, biofilms rapidly develop as volcanic rocks are produced at the mid-ocean ridges and Seamounts, and these types of microbial biomes are relatively unexplored. Geochemists, oceanographers and microbiologist have all questioned the role of the microbial organisms in the breakdown and weathering of the ocean crust. In particular, the energy sources and metabolisms supporting this rock-hosted microbial biosphere are currently unknown. Since the majority of the cold,

5

Capillary Break Beneath a Slab: Polyethylene Sheeting over Aggregate...  

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

Capillary Break Beneath a Slab: Polyethylene Sheeting Over Aggregate Southwestern Pennsylvania PROJECT INFORMATION Project Name: Capillary Break Beneath a Slab: Polyethylene...

6

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

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

of Hydrates System Dynamics Beneath Seafloor Mounds: Integrating Time-Lapse Machine shop at the University of Mississippi will be used to build, assemble and store...

7

Long Fingers of Heat Beneath Earth's Surface  

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

Long Fingers of Heat Long Fingers of Heat Beneath Earth's Surface Long Fingers of Heat Beneath Earth's Surface volcanic-hotspots1.jpg Why it Matters: A key mission for the Office of Basic Energy Science is related to new methods and techniques for geosciences imaging from the atomic scale to the kilometer scale. Geophysical imaging methods are needed to measure and monitor subsurface reservoirs for hydrocarbon production or for carbon dioxide storage resulting from large-scale carbon sequestration schemes. Key Challenges: Development of new approaches for regional and global seismic tomography using high-accuracy numerical schemes that treat wave propagation through complex 3D models of earth structure directly with spectral element methods. Accomplishments: A new, cutting-edge method for global seismic imaging that

8

Estimates of heat flow from Cenozoic seafloor using global depth and age data  

E-Print Network [OSTI]

-independent estimate of the total heat output of Cenozoic seafloor is 18.6 to 20.5 TW, which leads to a global output: Oceanic heat flow; Global heat budget; Subsidence rate 1. Introduction The total heat output of the EarthEstimates of heat flow from Cenozoic seafloor using global depth and age data Meng Wei , David

Sandwell, David T.

9

Non-linear load-deflection models for seafloor interaction with steel catenary risers  

E-Print Network [OSTI]

load-deflection (P-y) models (non-degradating and degradating models) to simulate seafloor-riser interaction. These two models considered the seafloor-riser system in terms of an elastic steel pipe supported on non-linear soil springs with vertical...

Jiao, Yaguang

2009-05-15T23:59:59.000Z

10

Evidence For Gas And Magmatic Sources Beneath The Yellowstone...  

Open Energy Info (EERE)

of magma beneath the Yellowstone caldera. Authors Stephan Husen, Robert B. Smith and Gregory P. Waite Published Journal Journal of Volcanology and Geothermal Research,...

11

Crust and Upper Mantle P Wave Velocity Structure Beneath Valles...  

Open Energy Info (EERE)

Structure Beneath Valles Caldera, New Mexico- Results from the Jemez Teleseismic Tomography Experiment Jump to: navigation, search OpenEI Reference LibraryAdd to library...

12

Temporal Velocity Variations beneath the Coso Geothermal Field...  

Open Energy Info (EERE)

beneath the Coso Geothermal Field Observed using Seismic Double Difference Tomography of Compressional and Shear Wave Arrival Times Jump to: navigation, search GEOTHERMAL...

13

C1-Approximationof Seafloor Surfaces With Large Variations Christian Gout' and Dimitri Komatitsch2  

E-Print Network [OSTI]

C1-Approximationof Seafloor Surfaces With Large Variations Christian Gout' and Dimitri Komatitsch2 ' Department of Applied Mathematics, IJniversit6 de Pau, E.R.S. 2055-CNRS, 64000 Pau, France, Christian.gout

Komatitsch, Dimitri

14

Seafloor studies at NURC/SACLANTCEN: The first 50 years (1959?2008)  

Science Journals Connector (OSTI)

Characterization of the seafloor has always been one of the central research themes at NURC/SACLANTCEN. These studies reviewed in this presentation generally supported acoustic measurement and modeling programs. Motivation for bottom?interacting acoustic research began with the deep?water ASW programs of the 1960s and 1970s (long?range propagation reflection and bottom loss measurements) and slowly evolved into support for high?frequency shallow?water MCM programs of the 1990s and 2000s (acoustic propagation within sediments penetration into and scattering from the sediment surface). Seafloor characterization has included scales appropriate for plate tectonics to sub?mm scale sediment microstructure used to statistically characterize sediment heterogeneity for high?frequency acoustic studies. Although collection and analysis of sediment cores has been the dominate methods of seafloor characterization direct in situ measurements and remote acoustic characterization has often been used. Seafloor studies were first rate cutting edge research as demonstrated by quality and quantity of peer?reviewed publications by NURC/SACLANTCEN scientists and their post?SACLANTCEN research careers. The excellent engineering department made possible the development of unique acoustic and seafloor sampling equipment. Ship support for seafloor studies has always been a NURC/SACLANTCEN advantage that has attracted many scientists to multi?national multi?institutional experiments and symposia.

Michael Richardson

2008-01-01T23:59:59.000Z

15

DOE Report Assesses Potential for Carbon Dioxide Storage Beneath Federal  

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

Report Assesses Potential for Carbon Dioxide Storage Beneath Report Assesses Potential for Carbon Dioxide Storage Beneath Federal Lands DOE Report Assesses Potential for Carbon Dioxide Storage Beneath Federal Lands May 14, 2009 - 1:00pm Addthis Washington, DC - As a complementary document to the U.S. Department of Energy's Carbon Sequestration Atlas of the United States and Canada issued in November 2008, the Office of Fossil Energy's National Energy Technology Laboratory has now released a report that provides an initial estimate of the potential to store carbon dioxide (CO2) underneath millions of acres of Federal lands. The report, Storage of Captured Carbon Dioxide Beneath Federal Lands, estimates and characterizes the storage potential that lies beneath some of the more than 400 million acres of Federal land available for lease.

16

Anomalous shear wave attenuation in the shallow crust beneath...  

Open Energy Info (EERE)

10 km volume of the shallow crust (one shallower than 5 km) that severely attenuate SV waves passing through them. These anomalies lie beneath the Indian Wells Valley 30 km south...

17

Laboratory simulation of subsurface airflow beneath a building  

E-Print Network [OSTI]

Vapor intrusion is the vapor-phase migration of volatile organic compounds (VOCs) into buildings due to subsurface soil or groundwater contamination. Oxygen replenishment rates beneath a building are significant for ...

Corsello, Joseph William

2014-01-01T23:59:59.000Z

18

Selected growth and interaction characteristics of seafloor faults in the central Mississippi Canyon Offshore Continental Shelf (OCS) area, northern Gulf of Mexico  

E-Print Network [OSTI]

for dealing with potentially active seafloor faults is avoidance?placing the seafloor facility, structure foundation, pilings, or pipeline in such a way that the potential for damage to the infrastructure is well within design limits for the design lifetime...

Wegner, Scott Ashley

2006-08-16T23:59:59.000Z

19

Planet Hunters and Seafloor Explorers: Legitimate Peripheral Participation Through Practice Proxies in Online Citizen Science  

E-Print Network [OSTI]

of practice as a way of compensating for a lack of access to the process of the work itself. Our findingsPlanet Hunters and Seafloor Explorers: Legitimate Peripheral Participation Through Practice Proxies,crowston, cjacks04}@syr.edu ABSTRACT Making visible the process of user participation in online crowd sourced

Crowston, Kevin

20

Expressions for Tidal Conversion at Seafloor Topography using Physical-Space Integrals  

E-Print Network [OSTI]

. Through this process, energy of the barotropic tides is converted into internal wave energy (Wunsch, 1975-mail: norbert@hawaii.edu Abstract. The barotropic tide interacts with seafloor topography to generate internal and a potential source of the required mechanical energy is the generation and breaking of internal gravity waves

Schörghofer, Norbert

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor  

Science Journals Connector (OSTI)

...microbial mat from a carbonate chimney formed at the seafloor in the...Pacific Ocean. (C) Barite chimney at a mud volcano in the Gulf...search for life elsewhere in our solar system and for understanding...extinct hydrothermal sulfide chimney off axis of the East Pacific...

Beth N. Orcutt; Jason B. Sylvan; Nina J. Knab; Katrina J. Edwards

2011-06-01T23:59:59.000Z

22

Oxygen as a control on seafloor biological communities and their roles in sedimentary carbon cycling  

E-Print Network [OSTI]

Oxygen as a control on seafloor biological communities and their roles in sedimentary carbon experiments were conducted at sites spanning the steep oxygen, organic matter, and biological community gradients across the Arabian Sea oxygen minimum zone, in order to quantify the role that fauna play

23

On the compliance method and the assessment of three-dimensional seafloor gas hydrate deposits  

Science Journals Connector (OSTI)

......approximation is not unlike the response of a country roadbed to an automobile moving over it. The car has motion but the response of the...of marine gas hydrate deposits using a seafloor transient electric dipole-dipole method62 6374. 10 Fink C.R. , Spence G......

K. Latychev; R. N. Edwards

2003-12-01T23:59:59.000Z

24

Temporal Velocity Variations beneath the Coso Geothermal Field Observed  

Open Energy Info (EERE)

Velocity Variations beneath the Coso Geothermal Field Observed Velocity Variations beneath the Coso Geothermal Field Observed using Seismic Double Difference Tomography of Compressional and Shear Wave Arrival Times Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Temporal Velocity Variations beneath the Coso Geothermal Field Observed using Seismic Double Difference Tomography of Compressional and Shear Wave Arrival Times Details Activities (1) Areas (1) Regions (0) Abstract: Microseismic imaging can be an important tool for characterizing geothermal reservoirs. Since microseismic sources occur more or less continuously both due to the operations of a geothermal field and the naturally occurring background seismicity, passive seismic monitoring is well suited to quantify the temporal variations in the vicinity of a

25

Evidence For Gas And Magmatic Sources Beneath The Yellowstone Volcanic  

Open Energy Info (EERE)

Evidence For Gas And Magmatic Sources Beneath The Yellowstone Volcanic Evidence For Gas And Magmatic Sources Beneath The Yellowstone Volcanic Field From Seismic Tomographic Imaging Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Evidence For Gas And Magmatic Sources Beneath The Yellowstone Volcanic Field From Seismic Tomographic Imaging Details Activities (1) Areas (1) Regions (0) Abstract: The 3-D P-wave velocity and P- to S-wave velocity ratio structure of the Yellowstone volcanic field, Wyoming, has been determined from local earthquake tomography using new data from the permanent Yellowstone seismic network. We selected 3374 local earthquakes between 1995 and 2001 to invert for the 3-D P-wave velocity (Vp) and P-wave to S-wave velocity ratio (Vp/Vs) structure. Vp anomalies of small size (15_15 km) are reliably

26

Dynamic Analysis of an Offshore Wind Turbine Drivetrain on a Floating Support  

Science Journals Connector (OSTI)

This paper presents a multi-body model for the study of the non stationary dynamic behaviour of an off-shore wind turbine power train. The problem studied is an off-shore implementation with seafloor depths ar...

Fernando Viadero…

2012-01-01T23:59:59.000Z

27

Autosub missions beneath Polar Ice: Preparation and Experience  

E-Print Network [OSTI]

Autosub missions beneath Polar Ice: Preparation and Experience Gwyn Griffiths Southampton, May 2004 #12;Autosub Polar Campaigns J 2001 - Krill distribution and sea ice thickness studies in the northern Weddell Sea (Brierley, Fernandes and Brandon). J 2003 - Sea ice thickness, Bellingshausen Sea

Griffiths, Gwyn

28

Regional variations in upper mantle structure beneath Southern California  

Science Journals Connector (OSTI)

......km beneath the southern Sierra Nevada. Since the expansion of the Southern...number of local quarries and at the Nevada Test Site have revealed that the crustal...observed in profiles from the Nevada Test Site and from local events (Hadley......

Susan A. Raikes

1980-10-01T23:59:59.000Z

29

Lithosphere structure beneath the Phanerozoic intracratonic basins of North America  

E-Print Network [OSTI]

Abstract Four intracratonic basins of North America, the Hudson Bay, Michigan, Illinois and Williston. The Williston and Illinois basins are associated with wide (V200 km) and thin anomalies (V100 km), whereas basin and 270 km beneath the Williston [4,6]. For two ba- sins of similar age located on the same Precam

Kaminski, Edouard

30

Paleofluvial Mega-Canyon Beneath the Central Greenland Ice Sheet  

Science Journals Connector (OSTI)

...m km ?1 , which is similar to the southern 500 km of the Colorado River and around three times larger than the average for the Mississippi...Fowler A. C. Clark C. D. Hulton N. R. J. , Subglacial floods beneath ice sheets . Phil. Trans. R. Soc. A 364 , 1769...

Jonathan L. Bamber; Martin J. Siegert; Jennifer A. Griggs; Shawn J. Marshall; Giorgio Spada

2013-08-30T23:59:59.000Z

31

Searching for life where the sun don't shine : explorations to the seafloors of Earth and Europa  

E-Print Network [OSTI]

Hydrothermal vents on Earth's seafloor host entire ecosystems that live off energy from chemosynthesis rather than photosynthesis. This energy process uses chemical reactions between metals and hot gases from inside Earth's ...

Fitzpatrick, Garret R

2012-01-01T23:59:59.000Z

32

Geochemistry of Chemical Weapon Breakdown Products on the Seafloor: 1,4-Thioxane in Seawater  

Science Journals Connector (OSTI)

Geochemistry of Chemical Weapon Breakdown Products on the Seafloor: 1,4-Thioxane in Seawater ... The Chemical Weapons Convention mandates the active destruction of chemical weapon (CW) stockpiles held by nations on land, but does not address the far larger quantities of “abandoned” CW that await passive environmental decomposition following disposal on the sea floor. ... The comingling of disposed weapons material with anoxic hydrate bearing sediments is not theoretical. ...

Xin Zhang; Keith C. Hester; Oscar Mancillas; Edward T. Peltzer; Peter M. Walz; Peter G. Brewer

2009-01-02T23:59:59.000Z

33

Modeling acoustic backscatter from the seafloor by long-range side-scan sonar  

E-Print Network [OSTI]

of the various scattering mechanisms in seafloor sediment are not well understood. Such an understanding is essential for developing acoustic remote sensing techniques and for constructing predictive models for bottom backscattering. Backscatter measurements... [1989]). These efforts have included several theoretical approaches. There are two well-known theoretical methods for calculating acoustic scattering from rough surfaces. One is based on the small roughness perturbation approximation [ Thorsos...

Lyons, Anthony Patrick

2012-06-07T23:59:59.000Z

34

An Archaean sub-seafloor geothermal system, ‘calc-alkali' trends, and massive sulphide genesis  

Science Journals Connector (OSTI)

... only weakly hydrated during halmyrolysis and burial metamorphism, but, in some areas, sub-seafloor geothermal activity contemporaneous with volcanism produced more intense rock-water interaction with higher water-to-rock ... alkaline' traits reflect a hydrothermal overprint caused by rock-water interaction during sub-sea floor geothermal activity as a modified seawater brine intensely spili-tized, silicified and leached metals from ...

P. J. MacGeehan; W. H. MacLean

1980-08-21T23:59:59.000Z

35

The effect of edifice load on magma ascent beneath a volcano  

Science Journals Connector (OSTI)

...2000) The e ect of edi ce load on magma ascent beneath a volcano...May. Petrological and isotopic data also indicate magma arrest at...2000) The e ect of edi ce load on magma ascent beneath a volcano...2000) The e ect of edi ce load on magma ascent beneath a volcano...

2000-01-01T23:59:59.000Z

36

NETL: News Release - A Climate Change Solution Beneath our Feet  

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

13, 2002 13, 2002 A Climate Change Solution Beneath Our Feet? Energy Department Joins AEP, Battelle to Study Deep Geologic Reservoirs for Greenhouse Gas Storage NEW HAVEN, WV - Deep beneath much of the United States lie rock formations containing waters far too salty for human consumption. Long overlooked, these brine-filled reservoirs are now attracting new interest as possible "storage sites" for greenhouse gases emitted from power plants. Graphic - Map of U.S. Saline Aquifers Deep saline formations underlie much of the United States including many areas where power plants are concentrated. [Click on map for larger image.] The U.S. Department of Energy has given the go-ahead to a research team headed by American Electric Power (AEP) and Battelle to begin studying

37

Ancient sub-seafloor alteration of basaltic andesites of the Ongeluk Formation, South Africa: implications for the chemistry of  

E-Print Network [OSTI]

Ancient sub-seafloor alteration of basaltic andesites of the Ongeluk Formation, South Africa, Auckland Park 2006, South Africa b School of Earth Sciences, University of Leeds, Woodhouse Lane, Leeds LS2¨ttingen, Germany e Medkim 2, Du Toitspan Road, Kimberley 8301, South Africa Accepted 25 June 2003 Abstract Basaltic

Banks, David

38

Storage of Captured Carbon Dioxide Beneath Federal Lands  

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

Storage of Captured Carbon Storage of Captured Carbon Dioxide Beneath Federal Lands May 8, 2009 DOE/NETL-2009/1358 Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government 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 therein 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 United States Government or any agency thereof. The

39

RoBOT: "Rocks Beneath Our Toes" An experiential learning opportunity in mineralogy and geochemistry  

E-Print Network [OSTI]

RoBOT: "Rocks Beneath Our Toes" An experiential learning opportunity in mineralogy Foundation What is RoBOT? The "Rocks Beneath Our Toes" or RoBOT Program began in 2006 with funding from high school RoBOT participants on a weekend field trip to collect and document rock samples

Baxter, Ethan F.

40

High Frequency Shear Waves Guided by a Continuous Lithosphere Descending beneath western South America  

Science Journals Connector (OSTI)

......earthquakes beneath northern Argentina and Bolivia. High frequency...earthquakes the high frequency energy arrives clearly later...beneath northern Chile and Argentina. 138 Gaps in other...frequency (near 1 Hz) energy arriving at the appropriate...Tonga, northern Chile-Argentina, and Indonesia. B......

Bryan L. Isacks; Muawia Barazangi

1973-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

The sedimentary record of subglacial erosion beneath the Laurentide Ice Sheet  

E-Print Network [OSTI]

The sedimentary record of subglacial erosion beneath the Laurentide Ice Sheet Gregory A. Balco Abstract The sedimentary record of subglacial erosion beneath the Laurentide Ice Sheet by Gregory A. Balco and Space Sciences I use measurements of the cosmic-ray-produced radionuclides 10 Be and 26 Al

Stone, John

42

The electrical resistivity structure of the crust beneath the northern Main Ethiopian Rift  

E-Print Network [OSTI]

The electrical resistivity structure of the crust beneath the northern Main Ethiopian Rift K containing partial melt. The crust is much more resistive beneath the southern plateau, and has no resistivity contrast between the upper and lower crust. The inferred geoelectric strike direction

43

Anomalous seafloor mounds in the northern Natal Valley, southwest Indian Ocean: Implications for the East African Rift System  

Science Journals Connector (OSTI)

Abstract The Natal Valley (southwest Indian Ocean) has a complicated and protracted opening history, as has the surrounding southwest Indian Ocean. Recently collected multibeam swath bathymetry and 3.5 kHz seismic data from the Natal Valley reveal anomalous seafloor mounds in the northern Natal Valley. The significance, of these domes, as recorders of the geological history of the Natal Valley and SE African Margin has been overlooked with little attempt made to identify their origin, evolution or tectonic significance. This paper aims to describe these features from a morphological perspective and to use their occurrence as a means to better understand the geological and oceanographic evolution of this basin. The seafloor mounds are distinct in both shallow seismic and morphological character from the surrounding seafloor of the Natal Valley. Between 25 km and 31 km long, and 16 km and 18 km wide, these features rise some 400 m above the sedimentary deposits that have filled in the Natal Valley. Such macro-scale features have not previously been described from the Natal Valley or from other passive margins globally. They are not the result of bottom water circulation, salt tectonics; rather, igneous activity is favoured as the origin for these anomalous seafloor features. We propose a hypothesis that the anomalous seafloor mounds observed in the Natal Valley are related to igneous activity associated with the EARS. The complicated opening history and antecedent geology, coupled with the southward propagation of the East African Rift System creates a unique setting where continental rift associated features have been developed in a marine setting.

Errol Wiles; Andrew Green; Mike Watkeys; Wilfried Jokat; Ralph Krocker

2014-01-01T23:59:59.000Z

44

NETL: Methane Hydrates - DOE/NETL Projects - Temporal Characterization of  

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

Temporal Characterization of Hydrates System Dynamics Beneath Seafloor Mounds Integrating Time-Lapse Electrical Resistivity Methods and In Situ Observations of Multiple Oceanographic Parameters Last Reviewed 12/18/2013 Temporal Characterization of Hydrates System Dynamics Beneath Seafloor Mounds Integrating Time-Lapse Electrical Resistivity Methods and In Situ Observations of Multiple Oceanographic Parameters Last Reviewed 12/18/2013 DE-FE0010141 Goal The overall objective of the project is to investigate hydrate system dynamics beneath seafloor mounds—a structurally focused example of hydrate occurrence at the landward extreme of their stability field—in the northern Gulf of Mexico. Researchers will conduct observatory-based in situ measurements at Woolsey Mound, MC118 to: Characterize (geophysically) the sub-bottom distribution of hydrate and its temporal variability and, Contemporaneously record relevant environmental parameters (temperature, pressure, salinity, turbidity, bottom currents, and seafloor

45

Melt zones beneath five volcanic complexes in California: an assessment of  

Open Energy Info (EERE)

Melt zones beneath five volcanic complexes in California: an assessment of Melt zones beneath five volcanic complexes in California: an assessment of shallow magma occurrences Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Melt zones beneath five volcanic complexes in California: an assessment of shallow magma occurrences Details Activities (5) Areas (5) Regions (0) Abstract: Recent geological and geophysical data for five magma-hydrothermal systems were studied for the purpose of developing estimates for the depth, volume and location of magma beneath each area. The areas studied were: (1) Salton Trough, (2) The Geysers-Clear Lake, (3) Long Valley caldera, (4) Coso volcanic field, and (5) Medicine Lake volcano, all located in California and all selected on the basis of recent volcanic activity and published indications of crustal melt zones. 23 figs.

46

A Low-Velocity Zone in the Basement Beneath the Valles Caldera...  

Open Energy Info (EERE)

the Valles Caldera, New Mexico Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: A Low-Velocity Zone in the Basement Beneath the Valles Caldera,...

47

Short-wavelength geoid, bathymetry and the convective pattern beneath the Pacific Ocean  

Science Journals Connector (OSTI)

......convective pattern beneath the Pacific Ocean L. Fleitout C. Moriceau aboratoire...geoid and bathymetry data in the Pacific Ocean are used to shed new light on...various wavebands on the Central Pacific Ocean: constraints on the origin of......

L. Fleitout; C. Moriceau

1992-07-01T23:59:59.000Z

48

Evolution of upper mantle beneath East Asia and the Tibetan Plateau from P-wave tomography  

E-Print Network [OSTI]

The main objective of the research presented in this thesis is to improve our understanding for the evolution of the upper mantle beneath East Asia and the Tibetan Plateau through high resolution P-wave tomography. The ...

Li, Chang, Ph.D.

2007-01-01T23:59:59.000Z

49

Anomalous shear wave attenuation in the shallow crust beneath the Coso  

Open Energy Info (EERE)

Anomalous shear wave attenuation in the shallow crust beneath the Coso Anomalous shear wave attenuation in the shallow crust beneath the Coso volcanic region, California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Anomalous shear wave attenuation in the shallow crust beneath the Coso volcanic region, California Details Activities (1) Areas (1) Regions (0) Abstract: We use seismograms of local earthquakes to image relative shear wave attenuation structure in the shallow crust beneath the region containing the Coso volcanic-geothermal area of eastern California. SV and P wave amplitudes were measured from vertical component seismograms of earthquakes that occurred in the Coso-southern Sierra Nevada region from July 1983 to 1985. Seismograms of 16 small earthquakes show SV amplitudes which are greatly diminished at some azimuths and takeoff angles,

50

Dynamic  

Office of Legacy Management (LM)

Dynamic Dynamic , and Static , Res.ponse of the Government Oil Shale Mine at ' , . , Rifle, Colorado, to the Rulison Event. , . ; . . DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best available original document. p ( y c - - a 2-1 0 -4- REPORT AT (29-2) 914 USBM 1 0 0 1 UNITED STATES DEPARTMENT O F THE I NTERIOR BUREAU OF MINES e s.09 P. L. R U S S E L L RESEARCH D l RECTOR Februory 2, lB7O DYNAMIC AND STATIC RESPONSE 'OF THE GOVERNMENT OIL SHALE MINE A T RIFLE, COLORADO, T O THE, RULISON EVENT ORDER FROM CFSTl A S ~ B ~ &J C / This page intentionally left blank CONTENTS Page . . . . . . . . . . . . . . . . . . . . . . . . . H i s t o r i c . a l Des c r i p t i o n 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Summary 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction 3

51

From continental extension to seafloor spreading: crustal structure of the Goban Spur rifted margin, southwest of the UK  

Science Journals Connector (OSTI)

......central Great Australian Bight (Sayers 2001), oceanic...north by the Porcupine Basin and to the south by the...beneath the Porcupine Basin, southwest of Ireland...central Great Australian Bight, in Non-volcanic Rifting...the Porcupine Seabight Basin and adjacent continental......

Andrew D. Bullock; Timothy A. Minshull

2005-11-01T23:59:59.000Z

52

Dynamics  

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

Hydration Hydration Water on Rutile Studied by Backscattering Neutron Spectroscopy and Molecular Dynamics Simulation E. Mamontov,* ,† D. J. Wesolowski, ‡ L. Vlcek, § P. T. Cummings, §,| J. Rosenqvist, ‡ W. Wang, ⊥ and D. R. Cole ‡ Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6473, Chemical Sciences DiVision, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6110, Department of Chemical Engineering, Vanderbilt UniVersity, NashVille, Tennessee 37235-1604, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6496, and EnVironmental Sciences DiVision, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6036 ReceiVed: December 20, 2007; ReVised Manuscript ReceiVed: June 4, 2008 The high energy resolution, coupled with the wide dynamic range, of the new backscattering

53

Inferences On The Hydrothermal System Beneath The Resurgent Dome In Long  

Open Energy Info (EERE)

Inferences On The Hydrothermal System Beneath The Resurgent Dome In Long Inferences On The Hydrothermal System Beneath The Resurgent Dome In Long Valley Caldera, East-Central California, Usa, From Recent Pumping Tests And Geochemical Sampling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Inferences On The Hydrothermal System Beneath The Resurgent Dome In Long Valley Caldera, East-Central California, Usa, From Recent Pumping Tests And Geochemical Sampling Details Activities (6) Areas (1) Regions (0) Abstract: Quaternary volcanic unrest has provided heat for episodic hydrothermal circulation in the Long Valley caldera, including the present-day hydrothermal system, which has been active over the past 40 kyr. The most recent period of crustal unrest in this region of east-central California began around 1980 and has included periods of

54

A Temperature Model Of The Crust Beneath The Barents Sea- Investigations  

Open Energy Info (EERE)

Model Of The Crust Beneath The Barents Sea- Investigations Model Of The Crust Beneath The Barents Sea- Investigations Along Geotraverses Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Temperature Model Of The Crust Beneath The Barents Sea- Investigations Along Geotraverses Details Activities (0) Areas (0) Regions (0) Abstract: 2D and 3D modeling of the geothermal field was carried out along seven extended geotraverses in the Barents Sea compiled on the basis of CMP profiling and results of deep drilling. Depths of the zone characterized by catagenetic transformation of organic matter were calculated for different areas of the sedimentary basin. The minimal depth is confined to the South Barents Basin with the highest hydrocarbon resource potential established by geological exploration. In 3D models, this area is distinguished by a

55

The entrainment of oil droplets in flow beneath an oil slick  

E-Print Network [OSTI]

THE ENTRAINMENT OF OIL DROPLETS IN PLOW BENEATH AN OIL SLICK A Thesis by CHIEN-HWA CHAO Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER OP SCIENCE August 1973 Ma...)or Sub)ect: Mechanical Engineering THE ENTRAINMENT OF OIL DROPLETS IN FLOW BENEATH AN OIL SLICK A Thesis CHIEN-HWA CHAD Approved as to style and content by: ( hairman o Committee) (Head of De tment) C ( (Member) ber) (Member) August 1973...

Chao, Chien-Hwa

2012-06-07T23:59:59.000Z

56

The thermal influence of the subducting slab beneath South America from 410 and 660 km discontinuity observations  

E-Print Network [OSTI]

The thermal influence of the subducting slab beneath South America from 410 and 660 km of the depth of the 410 km discontinuity are made beneath central South America in the vicinity of the aseismic form 2000 April 28 SUMMARY Regional seismic network data from deep South American earthquakes

Helffrich, George

57

Deep lithospheric dynamics beneath the Sierra Nevada during the Mesozoic and Cenozoic as  

E-Print Network [OSTI]

additions associated with a post-Miocene lithospheric removal event or extension. High elevations, low sub consistent with the aftermath of rapid lithospheric removal or sudden intrusion of asthenospheric mantle, it is possible that this lithospheric removal event was associated with the generation of the Sierra Nevada

Lee, Cin-Ty Aeolus

58

Mantle dynamics beneath the Pacific Northwest and the generation of voluminous back-arc volcanism  

E-Print Network [OSTI]

The Pacific Northwest (PNW) has a complex tectonic history and over the past ~17 Ma has played host to several major episodes of intraplate volcanism. These events include the Steens/Columbia River flood basalts (CRB) and ...

Long, Maureen D.

59

Geophysical (time domain electromagnetic model) delineation of a shallow brine beneath a freshwater lake,  

E-Print Network [OSTI]

et al., 1999] and (2) seepage from sediments beneath the lake [Braudo et al., 1970; Stiller et al., 1975; Stiller, 1994]. The average annual contribution of all sources is estimated to be 146,000 tons below lake's bottom, and to 2000­3500 mg/L at 5 m depth [Stiller, 1994]. On the basis of tritium data

Gvirtzman, Haim

60

Mantle flow beneath northwestern Venezuela: Seismic evidence for a deep origin of the Mrida Andes  

E-Print Network [OSTI]

Mantle flow beneath northwestern Venezuela: Seismic evidence for a deep origin of the Mérida Andes University, Houston, TX, USA b Fundación de Investigaciones Simológicas (FUNVISIS), Caracas, Venezuela a b wave splitting from SKS data recorded by the national seismic network of Venezuela and a linear

Niu, Fenglin

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Distinctive upper mantle anisotropy beneath the High Lava Plains and Eastern Snake River Plain,  

E-Print Network [OSTI]

Distinctive upper mantle anisotropy beneath the High Lava Plains and Eastern Snake River Plain and continuing with the still- ongoing volcanism in the High Lava Plains (HLP) and eastern Snake River Plain (SRP waves; shear wave splitting; high lava plains; Snake River Plain; Yellowstone. Index Terms: 8137

62

Elevated CO2 and O3 Alter Soil Nitrogen Transformations beneath  

E-Print Network [OSTI]

Elevated CO2 and O3 Alter Soil Nitrogen Transformations beneath Trembling Aspen, Paper Birch, North Carolina 27695, USA ABSTRACT Nitrogen cycling in northern temperate forest ecosystems could change to a negative feed- back on N availability. Key words: Acer saccharum; Betula papyrifera; Carbon dioxide; FACE

63

The seismic structure beneath the South Pa-cific superswell has not been well explored in  

E-Print Network [OSTI]

,Cook-Austral,Marquesas,and Pitcairn) whose volcanic rocks have isotopic characteris- tics suggesting deep mantle origin;and a broad chains in French Polynesia as part of the PLUME (Polynesian Lithosphere and Upper Mantle Experiment) project to image the upper mantle structure beneath French Polynesia [Barruol et al.,2002].The PLUME

64

Effective stress profiles and seepage flows beneath glaciers and ice sheets  

E-Print Network [OSTI]

stress for ice infiltration Qb Heat flux into glacier base Qf Heat produced by dissipation Qg GeothermalEffective stress profiles and seepage flows beneath glaciers and ice sheets Alan W. REMPEL spacing and the heat-flow regime. Considerations of thermodynamic equilibrium require that ice penetrates

Rempel, Alan W.

65

Subduction of the Nazca plate beneath Peru: evidence from spatial distribution of earthquakes  

Science Journals Connector (OSTI)

......inference of a nearly flat, subducted plate beneath...applied the model of a flat subducted plate supported...Palaeogene age in the central Rocky Mountains. Data and method...Peru between: (1) the flat geometry of the descending...Palaeogene age in the central Rocky Mountains of the western......

Muawia Barazangi; Bryan L. Isacks

1979-06-01T23:59:59.000Z

66

Transient groundwater dynamics in a coastal aquifer: The effects of tides, the lunar cycle, and the beach profile  

E-Print Network [OSTI]

Detailed field measurements are combined with a numerical modeling to characterize the groundwater dynamics beneath the discharge zone at Waquoit Bay, Massachusetts. Groundwater salinity values revealed a saline circulation ...

Abarca, Elena

67

A Preparation Zone For Volcanic Explosions Beneath Naka-Dake Crater, Aso  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » A Preparation Zone For Volcanic Explosions Beneath Naka-Dake Crater, Aso Volcano, As Inferred From Magnetotelluric Surveys Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Preparation Zone For Volcanic Explosions Beneath Naka-Dake Crater, Aso Volcano, As Inferred From Magnetotelluric Surveys Details Activities (0) Areas (0) Regions (0) Abstract: The 1st crater of Naka-dake, Aso volcano, is one of the most active craters in Japan, and known to have a characteristic cycle of activity that consists of the formation of a crater lake, drying-up of the

68

Tectonic implications of tomographic images of subducted lithosphere beneath Northwestern South America  

SciTech Connect (OSTI)

Tomographic images and deep seismicity of the mantle beneath northwestern South America support the existence of extensive and continuous subducted slabs which may be important controls on the neotectonic deformation of the overriding South America plate. Using tomographic data, we have estimated lateral continuity, regional dip, downdip length and approximate convergence direction of two, largely aseismic slabs. Tomographic data suggests that the Cauca slab, previously defined using earthquakes beneath southern Colombia, extends 300 km into the mantle beneath northern Colombia, has an average dip of 50[degrees], and is the downdip extension of Eocene to Miocene Panama island arc and Oligocene-Miocene oceanic crust of the Nazca plate. The Maracaibo slab of northern Colombia and western Venezuela extends up to 450 km into the mantle at an average angle of 16[degrees] and is the downdip extension of Late Cretaceous oceanic plateau crust of the Caribbean Sea. The boundary between the two slabs is less than 50 km in width. The Maracaibo and northern Cauca slabs are generally aseismic and not associated with an overlying volcanic arc. Instead, both slabs are overlain by broad zones of diffuse active faulting and topography in the northern Andes. The shallow dip, angle of oblique subduction and thickness of the Maracaibo slab may produce crustal deformation including northward tectonic escape of the Maracaibo block, a triangular wedge of continental crust in the overriding South America plate.

Van Der Hilst, R. (Leeds Univ. (United Kingdom)); Mann, P. (Univ. of Texas, Austin (United States))

1993-02-01T23:59:59.000Z

69

Nature and extent of lava-flow aquifers beneath Pahute Mesa, Nevada Test Site  

SciTech Connect (OSTI)

Work is currently underway within the Underground Test Area subproject of the US Department of Energy/Nevada Operations Office Environmental Restoration Program to develop corrective action plans in support of the overall corrective action strategy for the Nevada Test Site as established in the Federal Facility Agreement and Consent Order (FFACO, 1996). A closure plan is currently being developed for Pahute Mesa, which has been identified in the FFACO as consisting of the Western and Central Pahute Mesa Corrective Action Units. Part of this effort requires that hydrogeologic data be compiled for inclusion in a regional model that will be used to predict a contaminant boundary for these Corrective Action Units. Hydrogeologic maps have been prepared for use in the model to define the nature and extent of aquifers and confining units that might influence the flow of contaminated groundwater from underground nuclear tests conducted at Pahute Mesa. Much of the groundwater flow beneath Pahute Mesa occurs within lava-flow aquifers. An understanding of the distribution and hydraulic character of these important hydrogeologic units is necessary to accurately model groundwater flow beneath Pahute Mesa. This report summarizes the results of a study by Bechtel Nevada geologists to better define the hydrogeology of lava-flow aquifers at Pahute Mesa. The purpose of this study was twofold: (1) aid in the development of the hydrostratigraphic framework for Pahute Mesa, and (2) provide information on the distribution and hydraulic character of lava-flow aquifers beneath Pahute Mesa for more accurate computer modeling of the Western and Central Pahute Mesa Corrective Action Units.

Prothro, L.B.; Drellack, S.L. Jr.

1997-09-01T23:59:59.000Z

70

Chemical characteristics of precipitation beneath three forest types in east Texas  

E-Print Network [OSTI]

of throughfall and stemf low reaching the forest floor. Three 0. 04 hectare (0. 1 acre) plots were established in the Blue Hills area of northeastern Newton County, Texas, approximately two miles southwest of Toledo Bend Reservoir (Fig. 1). Climate Area...CHEMICAL CHARACTERISTICS OF PRECIPITATION BENEATH THREE FOREST TYPES IN EAST TEXAS A Thesis by Char les Edward Pehl Submitted to the Graduate College of Texas A8M Un i ve rs i ty in partial fulfillment of the requirement for the degree...

Pehl, Charles Edward

2012-06-07T23:59:59.000Z

71

Deep crustal sediment study: Widespread Precambrian layered rocks (Sedimentary ) beneath the US midcontinent  

SciTech Connect (OSTI)

A thick sequence of layered rocks occurs beneath the Phanerozoic platform strata which blanket the US midcontinent. Observed on COCORP deep reflection data in southern Illinois and Indiana and in SW Oklahoma and adjacent Texas, this sequence is locally 1--3 times as thick as the overlying Paleozoic cover, but the origin of this sequence, its ultimate lateral extent, and resource potential are unknown. The objective of this project is to seek and reprocess seismic reflection data provided by industry from the US midcontinent and together with the COCORP deep reflection data and information from the scattered basement-penetrating drill holes, to begin to constrain the distribution, origin and evolution of this enigmatic layered sequence, particularly to evaluate if sedimentary material may be an important constituent (i.e., deep gas potential).

Hauser, E.C.

1992-01-01T23:59:59.000Z

72

Deep crustal sediment study: Widespread Precambrian layered rocks (Sedimentary ?) beneath the US midcontinent  

SciTech Connect (OSTI)

A thick sequence of layered rocks occurs beneath the Phanerozoic platform strata which blanket the US midcontinent. Observed on COCORP deep reflection data in southern Illinois and Indiana and in SW Oklahoma and adjacent Texas, this sequence is locally 1--3 times as thick as the overlying Paleozoic cover, but the origin of this sequence, its ultimate lateral extent, and resource potential are unknown. The objective of this project is to seek and reprocess seismic reflection data provided by industry from the US midcontinent and together with the COCORP deep reflection data and information from the scattered basement-penetrating drill holes, to begin to constrain the distribution, origin and evolution of this enigmatic layered sequence, particularly to evaluate if sedimentary material may be an important constituent (i.e., deep gas potential).

Hauser, E.C.

1992-06-01T23:59:59.000Z

73

Pn Tomographic Velocity and Anisotropy beneath the Iran Region by Yan L, Bin Liu, Shunping Pei, Youshun Sun, M. Nafi Toksz, and Xiangfang Zeng  

E-Print Network [OSTI]

Short Note Pn Tomographic Velocity and Anisotropy beneath the Iran Region by Yan Lü, Bin Liu and anisotropy models of the upper- most mantle beneath the Iran region. A total of 74,375 Pn phase readings from). The tomography results show some interesting anomalies. The average Pn velocity under the Iran region

Sun, Youshun

74

The structure of the crust and uppermost mantle beneath the western US revealed by ambient noise and earthquake tomography  

E-Print Network [OSTI]

1 The structure of the crust and uppermost mantle beneath the western US revealed by ambient noise.Shapiro2 1 ­ Center for Imaging the Earth's Interior, Department of Physics, University of Colorado at Boulder, Boulder, CO 80309-0390, email:yingjie.yang@colorado.edu, phone: 303-735-1850 2 ­ Institut de

Ritzwolle, Mike

75

Assessing the flammability of surface fuels beneath ornamental vegetation in wildland urban interfaces in Provence (south-eastern France)  

E-Print Network [OSTI]

characteristics according to the composition of their litter. Hierarchical cluster analysis ranked the sevenAssessing the flammability of surface fuels beneath ornamental vegetation in wildland� urbanA A Irstea UR EMAX, 3275 route de C�zanne, CS 40061, F-13182 Aix-en-Provence, cedex 5, France. B

Boyer, Edmond

76

Coupled Geochemical and Hydrological Processes Governing the Fate and Transport of Radionuclides and Toxic Metals Beneath the Hanford Tank Farms  

SciTech Connect (OSTI)

The goal of this research was to provide an improved understanding and predictive capability of coupled hydrological and geochemical mechanisms that are responsible for the accelerated migration and immobilization of radionuclides and toxic metals in the badose zone beneath the Hanford Tank Farms.

Scott Fendorf; Phil Jardine

2006-07-21T23:59:59.000Z

77

Seismic Anisotropy and Mantle flow beneath Western Venezuela Jeniffer Masy,1 Fenglin Niu1 and Alan Levander1  

E-Print Network [OSTI]

Seismic Anisotropy and Mantle flow beneath Western Venezuela Jeniffer Masy,1 Fenglin Niu1 and Alan the Caribbean (CAR) and South American (SA) plates in western Venezuela is a wide area where a variety- mic Network of Venezuela. Yellow and red symbols represent temporal de- ployments under the first

Alvarez, Pedro J.

78

Upper-mantle anisotropy beneath the Cameroon Volcanic Line and Congo Craton from shear wave splitting measurements  

Science Journals Connector (OSTI)

......material from a large rising thermal anomaly beneath southern Ethiopia...Central Africa from Angola to Sudan. In the Archaean, the Gabon-Cameroon...attributed to convection driven by thermal gradients between the asthenosphere...upper-mantle LPO due to the thermal gradient at the edge of the......

Franklin W. Koch; Douglas A. Wiens; Andrew A. Nyblade; Patrick J. Shore; Rigobert Tibi; B. Ateba; C.T. Tabod; J. M. Nnange

2012-07-01T23:59:59.000Z

79

The effect of methane hydrate morphology and water saturation on seismic wave attenuation in sand under shallow sub-seafloor conditions  

Science Journals Connector (OSTI)

Abstract A better understanding of seismic wave attenuation in hydrate-bearing sediments is needed for the improved geophysical quantification of seafloor methane hydrates, important for climate change, geohazard and economic resource assessment. Hence, we conducted a series of small strain (hydrate-bearing sands under excess-water seafloor conditions. The results show a complex dependence of P- and S-wave attenuation on hydrate saturation and morphology. P- and S-wave attenuation in excess-water hydrate-bearing sand is much higher than in excess-gas hydrate-bearing sand and increases with hydrate saturation between 0 and 0.44 (the experimental range). Theoretical modelling suggests that load-bearing hydrate is an important cause of heightened attenuation for both P- and S-waves in gas and water saturated sands, while pore-filling hydrate also contributes significantly to P-wave attenuation in water saturated sands. A squirt flow attenuation mechanism, related to microporous hydrate and low aspect ratio pores at the interface between sand grains and hydrate, is thought to be responsible for the heightened levels of attenuation in hydrate-bearing sands at low hydrate saturations (<0.44).

Angus I. Best; Jeffrey A. Priest; Christopher R.I. Clayton; Emily V.L. Rees

2013-01-01T23:59:59.000Z

80

Organic acid transport through a partially saturated liner system beneath a landfill  

Science Journals Connector (OSTI)

Abstract A one-dimensional model was developed to investigate the transport of organic acids (commonly found in landfill leachate) through a partially saturated composite liner system beneath a landfill. Specific attention was paid to the influence of water content distribution on aqueous-phase diffusion process. Composite liner system was investigated, which was consisted of a geomembrane and a compacted clay liner underlain by three kinds of attenuation layer: sand layer, sandy clay loam layer, and clay layer. Volumetric water content profile in soil layers was obtained by Van Genuchten model, and the Millington and Quirk model was employed to describe the non-linear relationship between volumetric water content and diffusion coefficient. Three cases were analyzed and compared, i.e., totally saturated condition, unsaturated condition without considering unsaturated diffusion model, and unsaturated condition considering unsaturated diffusion model. The numerical results show that the unsaturated sand attenuation layer could serve as excellent diffusion barrier to organic contaminant due to its low water retention capacity. When the dependence of diffusion coefficient on volumetric water content is sufficiently considered, the contaminant flux decreases significantly in all the three kinds of attenuation layer. Unsaturated diffusion model capturing the relationship between water content and diffusion coefficient enables a more reasonable prediction of contaminant transport and distribution in soils.

Tingfa Liu; Liming Hu

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

*Wright, D.J., Donahue, B.T., and Naar, D.F., 2002. Seafloor mapping and GIS coordination at America's remotest national marine danctuary (American Samoa), in Wright, D.J. (ed.), Undersea with GIS, ESRI Press, Redlands, California,  

E-Print Network [OSTI]

*Wright, D.J., Donahue, B.T., and Naar, D.F., 2002. Seafloor mapping and GIS coordination at America's remotest national marine danctuary (American Samoa), in Wright, D.J. (ed.), Undersea with GIS National Marine Sanctuary (American Samoa)* Dawn J. Wright Department of Geosciences Oregon State

Wright, Dawn Jeannine

82

Data Package for Past and Current Groundwater Flow and Contamination beneath Single-Shell Tank Waste Management Areas  

SciTech Connect (OSTI)

This appendix summarizes historic and recent groundwater data collected from the uppermost aquifer beneath the 200 East and 200 West Areas. Although the area of interest is the Hanford Site Central Plateau, most of the information discussed in this appendix is at the scale of individual single-shell tank waste management areas. This is because the geologic, and thus the hydraulic, properties and the geochemical properties (i.e., groundwater composition) are different in different parts of the Central Plateau.

Horton, Duane G.

2007-03-16T23:59:59.000Z

83

Dynamic Rupture through a Branched Fault Configuration at Yucca Mountain, and Resulting Ground Motions  

E-Print Network [OSTI]

Dynamic Rupture through a Branched Fault Configuration at Yucca Mountain, and Resulting Ground of Yucca Mountain, Nevada, a potential site for a high-level radioactive waste repository. The Solitario km away from the SCF beneath the crest of Yucca Mountain, causing the repository site to experience

84

Categorical Exclusion Determinations: A11 | Department of Energy  

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

October 24, 2012 October 24, 2012 CX-009416: Categorical Exclusion Determination Routine Operating and Administrative Activities (ROAA) CX(s) Applied: A8, A9, A11, B1.3, B1.23, B1.31 Date: 10/24/2012 Location(s): Missouri Offices(s): Kansas City Site Office October 18, 2012 CX-009464: Categorical Exclusion Determination Temporal Characterization of Hydrates System Dynamics beneath Seafloor Mounds: Integrating Time-Lapse CX(s) Applied: A9, A11 Date: 10/18/2012 Location(s): Texas Offices(s): National Energy Technology Laboratory October 18, 2012 CX-009462: Categorical Exclusion Determination Temporal Characterization of Hydrates System Dynamics Beneath Seafloor Mounds: Integrating Time-Lapse CX(s) Applied: A9, A11 Date: 10/18/2012 Location(s): Mississippi Offices(s): National Energy Technology Laboratory

85

COCORP profiles from the Montana plains: The Archean cratonic crust and a lower crustal anomaly beneath the Williston basin  

SciTech Connect (OSTI)

New COCORP deep seismic reflection profiles from the Montana plains between the Rocky Mountains and the Williston basin image the crystalline continental basement of the Archean Wyoming cratonic province on a regional scale. The crust is, in general, reflective throughout its entire thickness. West of the Williston basin, the crust-mantle boundary is at the base of the reflective zone and is not marked by the presence of any distinctive reflections. The lowermost crust beneath the Williston basin is, in contrast, characterized by a prominent, laterally extensive zone of relatively high-amplitude reflections. If, as the spatial correlation suggest, the anomalously reflective lower crustal zone is causally related to the subsidence of the basin, then the data place constraints in addition to those of the sedimentary record on physical models for the evolution of the Williston basin.

Latham, T.S. (Cornell Univ., Ithaca, NY (USA)); Best, J.; Chaimov, T.; Oliver, J.; Brown, L.; Kaufman, S. (Cornell Univ. Ithaca, NY (USA))

1988-12-01T23:59:59.000Z

86

Lithosphere–asthenosphere interaction beneath the western United States from the joint inversion of body-wave traveltimes and surface-wave phase velocities  

Science Journals Connector (OSTI)

......properties of the Yellowstone-Snake River Plain. The parabola-shaped...of partial melting and high temperature (Humphreys et al. 2003...plume-like feature beneath the Snake River Plain is imaged to shallow...subducting oceanic plateaus in the development of shallow flat subduction......

Mathias Obrebski; Richard M Allen; Fred Pollitz; Shu-Huei Hung

2011-05-01T23:59:59.000Z

87

Fe isotope fractionation during phase separation in the NaCl–H2O system: An experimental study with implications for seafloor hydrothermal vents  

Science Journals Connector (OSTI)

Abstract Phase separation has been proposed as a possible mechanism contributing to the Fe isotope composition of hydrothermal fluids at mid-ocean ridges. The uncertainty results largely from the emphasis on field data that can involve competing processes that obscure cause and effect of any one process. To better understand the potential significance of phase separation in the NaCl–Fe–H2O system on Fe isotope fractionation, temperature and pressure of a Fe-bearing NaCl fluid in a titanium flow reactor were carefully adjusted to produce vapor ± liquid ± halite, while the Fe isotope composition between coexisting phases was monitored. Two different P–T regions were emphasized: (1) 424–420?°C, 35.2–31.5 MPa; and (2) 464–466?°C, 29.8–24.7 MPa. Both regions were chosen to simulate the range of physical conditions that are experienced by hydrothermal fluids at mid-ocean ridges (MORs). Decompression induced phase separation in both P–T regions results in the vapor phase becoming enriched in the heavier isotopes of Fe, as the Fe/Cl ratio decreases. The coexisting NaCl-rich liquid phase remains essentially constant with respect to Fe/Cl ratio and Fe isotope composition. Coinciding with the lowest vapor chlorinity in the vapor–liquid stability field, the Fe/Cl ratio of the vapor abruptly increases, while the Fe isotope fractionation between the vapor and liquid ( 10 3 ln ? ? V / L 56 / 54 ) reached a maximum value of + 0.145 ± 0.048 ‰ . Subsequently, Fe isotope fractionation decreased upon transition into the vapor–halite stability field (P–T region 2). We infer that the observed Fe isotope fractionation between vapor ± liquid ± halite is caused by differences in Fe speciation among coexisting chloride-bearing phases. The experimental study confirms for the first time that measurable Fe isotope variability can result from phase separation in high temperature hydrothermal systems. The species-dependent Fe isotope fractionation reported here is small relative to predicted mineral–mineral and mineral–fluid fractionations, especially if redox effects are involved as might occur during vent fluid–seawater mixing reactions and/or magmatic activity associated with seafloor eruptive episodes.

Drew D. Syverson; Nicholas J. Pester; Paul R. Craddock; William E. Seyfried Jr.

2014-01-01T23:59:59.000Z

88

Tsunamigenic Sea-Floor Deformations  

Science Journals Connector (OSTI)

...geodetic data. The qualitative characteristics (that is, variation of...real-time estimation of source characteristics of the TREMORS model [HN12...of Mw , Okal compares the characteristics of the source at high and...the Internet and dedicated intranets. In 1986, NOAA's Pacific...

Costas Synolakis; Philip Liu; H. Abelson Philip; George Carrier; Harry Yeh

1997-10-24T23:59:59.000Z

89

Seafloor Geomorphology as Benthic Habitat  

E-Print Network [OSTI]

, Jed T. Roberts2 , Douglas Fenner3 , John R. Smith4 , Anthony A.P. Koppers5 , David F. Naar6 , Emily R

Wright, Dawn Jeannine

90

The Centre will work in geodynamics, seismology, dynamic climatology and air-quality problems, each one covered by 2-3 work packages. All together, there will be nine work packages as follows  

E-Print Network [OSTI]

MAGMA Work Plan The Centre will work in geodynamics, seismology, dynamic climatology and air) WP8 Air quality (J. Brechler) WP9 Research and technical management (C. Matyska and J. Zahradnik on the viscosity distribution beneath the Fennoscandia, see also WP1-2. Participation in the projects SEAL, Germany

Cerveny, Vlastislav

91

What lies beneath | EMSL  

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

the nearby Columbia River. Even more pressing scenarios are playing out in contaminated uranium mining sites near waterways. The oxidation state of uranium is the main factor...

92

Inferences on the hydrothermal system beneath the resurgent dome in Long Valley Caldera, east-central California, USA, from recent pumping tests and geochemical sampling  

Science Journals Connector (OSTI)

Quaternary volcanic unrest has provided heat for episodic hydrothermal circulation in the Long Valley caldera, including the present-day hydrothermal system, which has been active over the past 40 kyr. The most recent period of crustal unrest in this region of east-central California began around 1980 and has included periods of intense seismicity and ground deformation. Uplift totaling more than 0.7 m has been centered on the caldera’s resurgent dome, and is best modeled by a near-vertical ellipsoidal source centered at depths of 6–7 km. Modeling of both deformation and microgravity data now suggests that (1) there are two inflation sources beneath the caldera, a shallower source 7–10 km beneath the resurgent dome and a deeper source ?15 km beneath the caldera’s south moat and (2) the shallower source may contain components of magmatic brine and gas. The Long Valley Exploration Well (LVEW), completed in 1998 on the resurgent dome, penetrates to a depth of 3 km directly above this shallower source, but bottoms in a zone of 100°C fluid with zero vertical thermal gradient. Although these results preclude extrapolations of temperatures at depths below 3 km, other information obtained from flow tests and fluid sampling at this well indicates the presence of magmatic volatiles and fault-related permeability within the metamorphic basement rocks underlying the volcanic fill. In this paper, we present recently acquired data from LVEW and compare them with information from other drill holes and thermal springs in Long Valley to delineate the likely flow paths and fluid system properties under the resurgent dome. Additional information from mineralogical assemblages in core obtained from fracture zones in LVEW documents a previous period of more vigorous and energetic fluid circulation beneath the resurgent dome. Although this system apparently died off as a result of mineral deposition and cooling (and/or deepening) of magmatic heat sources, flow testing and tidal analyses of LVEW water level data show that relatively high permeability and strain sensitivity still exist in the steeply dipping principal fracture zone penetrated at a depth of 2.6 km. The hydraulic properties of this zone would allow a pressure change induced at distances of several kilometers below the well to be observable within a matter of days. This indicates that continuous fluid pressure monitoring in the well could provide direct evidence of future intrusions of magma or high-temperature fluids at depths of 5–7 km.

Christopher D. Farrar; Michael L. Sorey; Evelyn Roeloffs; Devin L. Galloway; James F. Howle; Ronald Jacobson

2003-01-01T23:59:59.000Z

93

Biosystem Dynamics & Design | EMSL  

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

Biosystem Dynamics & Design Overview Atmospheric Aerosol Systems Biosystem Dynamics & Design Energy Materials & Processes Terrestrial & Subsurface Ecosystems Biosystem Dynamics &...

94

Introduction Basic dynamics  

E-Print Network [OSTI]

Introduction Basic dynamics The Gulf Stream The thermohaline circulation Ocean currents: some Ocean currents: some misconceptions and some dynamics #12;Introduction Basic dynamics The Gulf Stream. Geosciences Ocean currents: some misconceptions and some dynamics #12;Introduction Basic dynamics The Gulf

LaCasce, Joseph H.

95

A New Seafloor Gravimeter Glenn Sasagawa1  

E-Print Network [OSTI]

for the detection of seawater infiltration in offshore natural gas fields during production. Reservoir models was deployed in the North Sea during June 1998; a total of 75 observations were made at 32 stations incurring additional survey time. A total of 159 measurements were made at 68 stations. The standard

Nooner, Scott

96

Classification of Seafloor Habitats using Genetic Programming  

E-Print Network [OSTI]

habitats. The initial motivation to use GP for this task came from a work on diesel engine diagnosis [11 for Marine Science and Technology Curtin University of Technology GPO Box U1987, Perth, WA 6845, Australia y understand- ing of the acoustic backscatter from marine macro-benthos (MMB), including mainly seagrass, algae

Fernandez, Thomas

97

Symbolic dynamics  

E-Print Network [OSTI]

This chapter presents some of the links between automata theory and symbolic dynamics. The emphasis is on two particular points. The first one is the interplay between some particular classes of automata, such as local automata and results on embeddings of shifts of finite type. The second one is the connection between syntactic semigroups and the classification of sofic shifts up to conjugacy.

Béal, M -P; Eilers, S; Perrin, D

2010-01-01T23:59:59.000Z

98

Subglacial floods beneath ice sheets  

Science Journals Connector (OSTI)

...depth 100m subject to a geothermal heat flux of 50m2 gives...crude estimate). As well as the present theoretical...Atlantic or to the Gulf of Mexico. One reason for supposing...do not know this very well for a palaeo-ice sheet...and P Gogineni2001High geothermal flow, basal melt, and...

2006-01-01T23:59:59.000Z

99

Introduction Dynamic Risk Measures  

E-Print Network [OSTI]

Introduction Dynamic Risk Measures Dynamic Risk Measures from BMO martingales Bid-Ask Dynamic Pricing Procedure Conclusion MESURES DE RISQUE DYNAMIQUES DYNAMIC RISK MEASURES Jocelyne Bion-Nadal CNRS Risk Measures Dynamic Risk Measures from BMO martingales Bid-Ask Dynamic Pricing Procedure Conclusion

Bion-Nadal, Jocelyne

100

Dynamic Positioning Simulator Dynamic Positioning Simulator  

E-Print Network [OSTI]

Simulator 5 / 24 #12;Dynamic Positioning Simulator Dynamic Positioning Why Dynamic Positioning? Advantages Dynamic Positioning: No tugboats needed; Offshore set-up is quick; Power saving; Precision situations more on Ship: Wind Force Fw = 1 2 air V 2 rw CXw (rw )AT 1 2 air V 2 rw CYw (rw )AL Mw = 1 2 air V 2 rw CMw (rw

Vuik, Kees

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Cybersecurity Dynamics Shouhuai Xu  

E-Print Network [OSTI]

Cybersecurity Dynamics Shouhuai Xu Department of Computer Science, University of Texas at San Antonio ABSTRACT We explore the emerging field of Cybersecurity Dynamics, a candidate foundation for the Science of Cybersecurity. Keywords Cybersecurity dynamics, security model, security analysis 1

Xu, Shouhuai

102

Does High[Plasma]-Beta Dynamics "Load" Active Regions?  

E-Print Network [OSTI]

Using long-duration observations in the He II 304 Angstrom passband of the Solar and Heliospheric Observatory (SOHO) Extreme-ultraviolet Imaging Telescope (EIT) we investigate the spatial and temporal appearance of impulsive intensity fluctuations in the pixel light curves. These passband intensity fluctuations come from plasma emitting in the chromosphere, transition region and lowest portions of the corona. We see that they are spatially tied to the supergranular scale and that their rate of occurrence is tied to the unsigned imbalance of the magnetic field in which they are observed. The signature of the fluctuations (in space and time) is consistent with their creation by magnetoconvection forced reconnection that is driven by the flow field in the high-beta plasma. The signature of the intensity fluctuations around an active region suggest that the bulk of the mass and energy supplied into the active region complex observed in the hotter coronal plasma is supplied by this process, dynamically forcing the looped structure from beneath.

Scott W. McIntosh

2007-02-04T23:59:59.000Z

103

Essays in dynamic contracting  

E-Print Network [OSTI]

This thesis examines three models of dynamic contracting. The first model is a model of dynamic moral hazard with partially persistent states, and the second model considers relational contracts when the states are partially ...

Kwon, Suehyun

2012-01-01T23:59:59.000Z

104

Intramolecular and nonlinear dynamics  

SciTech Connect (OSTI)

Research in this program focuses on three interconnected areas. The first involves the study of intramolecular dynamics, particularly of highly excited systems. The second area involves the use of nonlinear dynamics as a tool for the study of molecular dynamics and complex kinetics. The third area is the study of the classical/quantum correspondence for highly excited systems, particularly systems exhibiting classical chaos.

Davis, M.J. [Argonne National Laboratory, IL (United States)

1993-12-01T23:59:59.000Z

105

3 - Mobile Robot Dynamics  

Science Journals Connector (OSTI)

Mobile robot dynamics is a challenging field on its own, especially due to the variety of the imposed constraints. Delicate stability and control problems that have very often to be faced are due to longitudinal or lateral slip, and to the features of the ground (roughness, etc.). This chapter has the following objectives: (i) to present the general dynamic modeling concepts and techniques of robots, (ii) to study the Newton–Euler and Lagrange dynamic models of differential-drive mobile robots, (iii) to study the dynamics of differential-drive mobile robots with longitudinal and lateral slip, (iv) to derive a dynamic model of car-like wheeled mobile robots, (v) to derive a dynamic model of three-wheel omnidirectional robots, and (vi) to derive a dynamic model of four-wheel mecanum omnidirectional robots.

Spyros G. Tzafestas

2014-01-01T23:59:59.000Z

106

AVESTAR® - Dynamic Modeling  

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

Dynamic Modeling Dynamic Modeling The AVESTAR team is pursuing research on the dynamic modeling and simulation of advanced energy systems ranging from power plants to power grids. Dynamic models provide a continuous view of energy systems in action by calculating their transient behavior over time. Plant-wide Models For power plants, dynamic models are used to analyze a wide variety of operating scenarios, including normal base load operation, startup, shutdown, feedstock switchovers, cycling, and load-following. Dynamic process and control models are also essential for analyzing plant responses to setpoint changes and disturbances, as well as malfunctions and abnormal situations. Other applications of plant-wide dynamic models include controllability and operational flexibility analyses, environmental studies, safety evaluations, and risk mitigation.

107

Dynamical friction in modified Newtonian dynamics  

E-Print Network [OSTI]

We have tested a previous analytical estimate of the dynamical friction timescale in Modified Newtonian Dynamics (MOND) with fully non-linear N-body simulations. The simulations confirm that the dynamical friction timescale is significantly shorter in MOND than in equivalent Newtonian systems, i.e. systems with the same phase-space distribution of baryons and additional dark matter. An apparent conflict between this result and the long timescales determined for bars to slow and mergers to be completed in previous N-body simulations of MOND systems is explained. The confirmation of the short dynamical-friction timescale in MOND underlines the challenge that the Fornax dwarf spheroidal poses to the viability of MOND.

C. Nipoti; L. Ciotti; J. Binney; P. Londrillo

2008-02-08T23:59:59.000Z

108

Chemical Structure and Dynamics  

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

2154-3 2154-3 UC-400 Annual Report 2000 Chemical Structure and Dynamics Steven D. Colson, Associate Director Robin S. McDowell, Program Manager and the Staff of the Chemical Structure and Dynamics Program April 2001 Prepared for the U.S. Department of Energy under Contract DE-AC06-76RL01830 Chemical Structure and Dynamics 2000 Annual Report Contents Chemical Structure and Dynamics 2000 Annual Report Chemical Structure and Dynamics 2000 Annual Report 1. Introduction Chemical Structure and Dynamics Program......................................................... 1-3 2. Reaction Mechanisms at Liquid Interfaces Structure and Reactivity of Ice Surfaces and Interfaces G. A. Kimmel, Z. Dohnálek, K. P. Stevenson, R. S. Smith,

109

Dynamic Instruction Fusion  

E-Print Network [OSTI]

SANTA CRUZ DYNAMIC INSTRUCTION FUSION A thesis submitted in4 2.2 Instruction Fusion & Complex10 3.1 Fusion Selection

Lee, Ian

2012-01-01T23:59:59.000Z

110

Accelerated Molecular Dynamics Methods  

Broader source: Energy.gov [DOE]

This presentation on Accelerated Molecular Dynamics Methods was given at the DOE Theory Focus Session on Hydrogen Storage Materials on May 18, 2006.

111

Seminar N 03301, Dynamically  

E-Print Network [OSTI]

Seminar Nº 03301, Dynamically Reconfigurable Architectures A Mead-&-Conway-like Break ·Ametek ·Applied Dynamics ·Astronautics ·BBN ·CDC ·Convex ·Cray Computer ·Cray Research ·Culler-Harris

Hartenstein, Reiner

112

Photosynthesis in Dynamic Animations  

Science Journals Connector (OSTI)

Photosynthesis in Dynamic Animations ... To support chemistry instruction in high school we created a series of interactive animations that show photosynthetic processes in a eukaryotic cell. ... The example from the educational program “Photosynthesis in Dynamic Animations”, the description of photosynthetic cell. ...

Milada Teplá; Helena Klímová

2013-10-09T23:59:59.000Z

113

NETL: Methane Hydrates - Gas Hydrate Research in Deep Sea Sediments - New  

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

Hydrate Research in Deep Sea Sediments - Chatham Rise, New Zealand Task Last Reviewed 12/30/2013 Hydrate Research in Deep Sea Sediments - Chatham Rise, New Zealand Task Last Reviewed 12/30/2013 DE-AI26-06NT42878 Goal The goal of the Interagency Agreement between the National Energy Technology Laboratory and the Naval Research Laboratory is to conduct research to enhance understanding of the extent and dynamics of gas hydrate deposits and their relation to areas of focused fluid flux at and beneath the seafloor. Performer Marine Biogeochemistry Section, Naval Research Laboratory, Washington, DC 20375 Background Methane is a potent greenhouse gas necessitating a better understanding of the mechanisms controlling its contribution to the atmospheric carbon cycle. Active methane fluxes (from deep sediment hydrates and seeps) contribute to shallow sediment biogeochemical carbon cycles, which in turn

114

Categorical Exclusion Determinations: Mississippi | Department of Energy  

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

Mississippi Mississippi Categorical Exclusion Determinations: Mississippi Location Categorical Exclusion Determinations issued for actions in Mississippi. DOCUMENTS AVAILABLE FOR DOWNLOAD September 11, 2013 CX-011018: Categorical Exclusion Determination A Systematic Multiscale Modeling and Experimental Approach to Protect Grain Boundaries in Magnesium... CX(s) Applied: A9, B3.6 Date: 09/11/2013 Location(s): Mississippi Offices(s): National Energy Technology Laboratory June 24, 2013 CX-010511: Categorical Exclusion Determination Mississippi State University Sustainable Energy Research Center CX(s) Applied: A9, B3.6 Date: 06/24/2013 Location(s): Mississippi Offices(s): Golden Field Office October 18, 2012 CX-009463: Categorical Exclusion Determination Temporal Characterization of Hydrates System Dynamics Beneath Seafloor

115

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

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

18, 2012 18, 2012 CX-009395: Categorical Exclusion Determination Central Facilities Area (CFA)-696 Gasoline Tank Installation CX(s) Applied: B2.5 Date: 10/18/2012 Location(s): Idaho Offices(s): Nuclear Energy October 18, 2012 CX-009467: Categorical Exclusion Determination Recovery Act - Clean Energy Coalition Michigan Green Fleets CX(s) Applied: B5.23 Date: 10/18/2012 Location(s): Michigan Offices(s): National Energy Technology Laboratory October 18, 2012 CX-009466: Categorical Exclusion Determination Pittsburgh Spectroscopy and Electrochemistry Lab CX(s) Applied: B3.6 Date: 10/18/2012 Location(s): Pennsylvania Offices(s): National Energy Technology Laboratory October 18, 2012 CX-009465: Categorical Exclusion Determination Temporal Characterization of Hydrates System Dynamics Beneath Seafloor

116

Page not found | Department of Energy  

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

61 - 4970 of 28,905 results. 61 - 4970 of 28,905 results. Download CX-009465: Categorical Exclusion Determination Temporal Characterization of Hydrates System Dynamics Beneath Seafloor Mounds: Integrating Time-Lapse CX(s) Applied: B3.6 Date: 10/18/2012 Location(s): Texas Offices(s): National Energy Technology Laboratory http://energy.gov/nepa/downloads/cx-009465-categorical-exclusion-determination Download CX-009466: Categorical Exclusion Determination Pittsburgh Spectroscopy and Electrochemistry Lab CX(s) Applied: B3.6 Date: 10/18/2012 Location(s): Pennsylvania Offices(s): National Energy Technology Laboratory http://energy.gov/nepa/downloads/cx-009466-categorical-exclusion-determination Download CX-009468: Categorical Exclusion Determination Midwest Region Alternative Fuels Project CX(s) Applied: B5.1

117

Solar Dynamics | Open Energy Information  

Open Energy Info (EERE)

Dynamics Jump to: navigation, search Name: Solar Dynamics Place: Ottumwa, Iowa Zip: IA 52501 Sector: Solar Product: Solar Dynamics is a US-based solar powered attic roof vents...

118

Beam Dynamics for Induction Accelerators  

E-Print Network [OSTI]

Dynamics for Induction Accelerators Edward P. Lee Lawrencea natural candidate accelerator for a heavy ion fusion (HIF)words: Fusion, Induction, Accelerators, Dynamics This work

Lee, E.P.

2014-01-01T23:59:59.000Z

119

Towards a Hybrid Dynamic Logic for Hybrid Dynamic Systems1  

E-Print Network [OSTI]

HyLo 2006 Towards a Hybrid Dynamic Logic for Hybrid Dynamic Systems1 Andr´e Platzer2 Carnegie platzer@informatik.uni-oldenburg.de Abstract We introduce a hybrid variant of a dynamic logic for this extended hybrid dynamic logic. With the addition of satisfaction operators, this hybrid logic provides

Platzer, André

120

Fundamentals of Dynamical Systems  

Science Journals Connector (OSTI)

For the purposes of control system design, analysis, test, and repair, the most important part of the very broad subject known as system theory is the theory of dynamical systems. It is difficult to give a pre...

William S. Levine

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Swarms in dynamic environments  

Science Journals Connector (OSTI)

Charged particle swarm optimization (CPSO) is well suited to the dynamic search problem since inter-particle repulsion maintains population diversity and good tracking can be achieved with a simple algorithm. This work extends the application of CPSO ...

T. M. Blackwell

2003-07-01T23:59:59.000Z

122

Biological Interactions and Dynamics  

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

PNNL-20717 Biological Interactions and Dynamics Science Theme Advisory Panel (BID-STAP) May 2011 Report: September 2011 Prepared for the U.S. Department of Energy's Office of...

123

Testing dynamically reconfigurable FPGAs  

E-Print Network [OSTI]

In this work, testing methods are proposed to test the ics. logic resources and the interconnect structure of dynamically reconfigurable FPGAS. Testing methods are also proposed for testing the dedicated CPU interface in these FPGAS. A BIST...

Ruiwale, Sameer Jagadish

2012-06-07T23:59:59.000Z

124

Accelerating dynamic programming  

E-Print Network [OSTI]

Dynamic Programming (DP) is a fundamental problem-solving technique that has been widely used for solving a broad range of search and optimization problems. While DP can be invoked when more specialized methods fail, this ...

Weimann, Oren

2009-01-01T23:59:59.000Z

125

Dynamic Instruction Fusion  

E-Print Network [OSTI]

File Size Dynamic Read Energy (nJ) # of Ports Figure 17:with fewer ports, are much less expensive energy-wise. By “Energy by Register File Size Leakage Power (mW) # of Ports

Lee, Ian

2012-01-01T23:59:59.000Z

126

Multipulsed dynamic moire interferometer  

DOE Patents [OSTI]

An improved dynamic moire interferometer comprised of a lasing medium providing a plurality of beams of coherent light, a multiple q-switch producing multiple trains of 100,000 or more pulses per second, a combining means collimating multiple trains of pulses into substantially a single train and directing beams to specimen gratings affixed to a test material, and a controller, triggering and sequencing the emission of the pulses with the occurrence and recording of a dynamic loading event.

Deason, Vance A. (Idaho Falls, ID)

1991-01-01T23:59:59.000Z

127

Photochemical reaction dynamics  

SciTech Connect (OSTI)

The purpose of the program is to develop a fundamental understanding of unimolecular and bimolecular reaction dynamics with application in combustion and energy systems. The energy dependence in ketene isomerization, ketene dissociation dynamics, and carbonyl substitution on organometallic rhodium complexes in liquid xenon have been studied. Future studies concerning unimolecular processes in ketene as well as energy transfer and kinetic studies of methylene radicals are discussed.

Moore, B.C. [Lawrence Berkeley Laboratory, Livermore, CA (United States)

1993-12-01T23:59:59.000Z

128

Local Writhing Dynamics  

E-Print Network [OSTI]

We present an alternative local definition of the writhe of a self-avoiding closed loop which differs from the traditional non-local definition by an integer. When studying dynamics this difference is immaterial. We employ a formula due to Aldinger, Klapper and Tabor for the change in writhe and propose a set of local, link preserving dynamics in an attempt to unravel some puzzles about actin.

Randall D. Kamien

1997-03-13T23:59:59.000Z

129

The challenge of permanent 4-C seafloor systems  

Science Journals Connector (OSTI)

...protection against physical abuse and water intrusion caused...satellite programs and the wireless Internet that have revolutionized telecommunications...protection against physical abuse and water intrusion caused...pro-grams and the wireless Internet that have revolutionized telecommunications...

Roger Entralgo; Simon Spitz

130

Controls on the physics and chemistry of seafloor hydrothermal circulation  

Science Journals Connector (OSTI)

...properties (e.g. the presence of free gas) can give rise to large instantaneous...partial support of grants received from the Natural Environ- ment Research Council/BRIDGE...celadonites within the Troodos ophiolite, Cyprus: implications for low-temperature alteration...

1997-01-01T23:59:59.000Z

131

Seafloor topography and tectonic elements of the Western Indian Ocean  

Science Journals Connector (OSTI)

...northerly part of the Western Indian Ocean is characterized by the...world's oceans and in the Western Indian Ocean is represented by a shallow...ocean basins. At its shallowest point (66 9 5 7 E , 17 30 2 2 S...5600 m, on the Southwest Indian Ridge (Patriat et al. 1997...

2005-01-01T23:59:59.000Z

132

Physical properties of seafloor sediments from the Russian Pechora Sea  

E-Print Network [OSTI]

This study is the first of its kind in the English language that characterizes and quantifies the physical, acoustical, and geotechnical properties of the surficial marine sediments in the Pechora Sea. Profiles of bulk density, porosity, velocity...

Sarmiento, Sergio Eduardo

2012-06-07T23:59:59.000Z

133

Breakup and early seafloor spreading between India and Antarctica  

Science Journals Connector (OSTI)

......124.1 Ma) in the Enderby Basin, and M9o to M4o (126.7 Ma...Elizabeth Trough and Davis Sea Basin, indicating that India-Antarctica...Ridge to the Great Australian Bight. Stagg et al. (2004) suggest...western and eastern Enderby Basin segments based on the observed......

Carmen Gaina; R. Dietmar Müller; Belinda Brown; Takemi Ishihara; Sergey Ivanov

2007-07-01T23:59:59.000Z

134

Breakup and early seafloor spreading between India and Antarctica  

Science Journals Connector (OSTI)

......central Enderby Basin and Davis Sea...topography observed in Australian and Japanese seismic...between Antarctica, Greater India and Australia...Broken Ridge to the Great Australian Bight. Stagg et al...eastern Enderby Basin segments based......

Carmen Gaina; R. Dietmar Müller; Belinda Brown; Takemi Ishihara; Sergey Ivanov

2007-07-01T23:59:59.000Z

135

MMS 2007-035 Seafloor Characteristics and Distribution  

E-Print Network [OSTI]

seismic data archived with MMS and his unwavering support and patience during all the phases of this study this situation is already occurring globally principally due to destructive fishing practices and secondarily

Mathis, Wayne N.

136

Discontinuities in the History of Sea-floor Spreading  

Science Journals Connector (OSTI)

... following. Let X be the distance, measured parallel to the spreading direction, of a parcel of crust from the axis of the mid-ocean ridge. Then a lapse is ... occasional vulcanism and the effects of sedimentation.

ERIC D. SCHNEIDER; PETER R. VOGT

1968-03-30T23:59:59.000Z

137

Numerical model for steel catenary riser on seafloor support  

E-Print Network [OSTI]

for Variable Types of Soil Spring ....................................................... 43 3.29 Bending Stress Variation for Influence of tco ........................................................44 3.30 Deflection Variation for Influence of tco... for Variable Types of Soil Spring ....................................................... 43 3.29 Bending Stress Variation for Influence of tco ........................................................44 3.30 Deflection Variation for Influence of tco...

You, Jung Hwan

2007-04-25T23:59:59.000Z

138

Seafloor eruptions and evolution of hydrothermal fluid chemistry  

Science Journals Connector (OSTI)

...J. Massoth 3 R. A. Feely 3 K. K. Roe 1 R. E. Embley 4 J. F. Holden 5 R...Massoth G. J. Author Feely R. A. Author Roe K. K. Author Embley R. E. Author Holden...Sleep, N. H., Morton, J. L., Burns, L. E. & Wolery, T. J. 1983 Geophysical...

1997-01-01T23:59:59.000Z

139

Controls on the physics and chemistry of seafloor hydrothermal circulation  

Science Journals Connector (OSTI)

...convected at the supply temperature T1, ignoring...A (1997) Controls on hydrothermal...rock from these temperatures to the temperatures...A (1997) Controls on hydrothermal...conditions. The temperature at the base of...

1997-01-01T23:59:59.000Z

140

Seafloor anchoring for platforms in the Messina Strait  

E-Print Network [OSTI]

The importance of properly designing and selecting an anchor is key to reliable techniques for floating offshore platforms including power generation from marine currents. Numerous studies have demonstrated how the uplift ...

Manno, Antonioluca

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Surface Chemical Dynamics  

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

Surface Chemical Dynamics Surface Chemical Dynamics The goal of the Surface Chemical Dynamics Program is to elucidate the underlying physical processes that determine the products (selectivity) and yield (efficiency) of chemical transformations relevant to energy-related chemistry on catalytic and nanostructured surfaces. Achieving this end requires understanding the evolution of the reactant-molecule/surface complex as molecules adsorb, bonds dissociate, surface species diffuse, new bonds form and products desorb. The pathways and time scales of these processes are ultimately determined by a multidimensional potential energy surface that is a function of the geometric and electronic structures of the surface and the reactant, product, intermediate and transition-state molecular and atomic species.

142

MAX Fluid Dynamics facility  

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

MAX Fluid Dynamics facility MAX Fluid Dynamics facility Capabilities Engineering Experimentation Reactor Safety Testing and Analysis Overview Nuclear Reactor Severe Accident Experiments MAX NSTF SNAKE Aerosol Experiments System Components Laser Applications Robots Applications Other Facilities Other Capabilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr MAX Fluid Dynamics facility Providing high resolution data for development of computational tools that model fluid flow and heat transfer within complex systems such as the core of a nuclear reactor. 1 2 3 4 5 Hot and cold air jets are mixed within a glass tank while laser-based anemometers and a high-speed infrared camera characterize fluid flow and heat transfer behavior. Click on image to view larger size image.

143

Dynamic Transmission Electron Microscopy  

SciTech Connect (OSTI)

Dynamic transmission electron microscopy (DTEM) combines the benefits of high spatial resolution electron microscopy with the high temporal resolution of ultrafast lasers. The incorporation of these two components into a single instrument provides a perfect platform for in situ observations of material processes. However, previous DTEM applications have focused on observing structural changes occurring in samples exposed to high vacuum. Therefore, in order to expand the pump-probe experimental regime to more natural environmental conditions, in situ gas and liquid chambers must be coupled with Dynamic TEM. This chapter describes the current and future applications of in situ liquid DTEM to permit time-resolved atomic scale observations in an aqueous environment, Although this chapter focuses mostly on in situ liquid imaging, the same research potential exists for in situ gas experiments and the successful integration of these techniques promises new insights for understanding nanoparticle, catalyst and biological protein dynamics with unprecedented spatiotemporal resolution.

Evans, James E.; Jungjohann, K. L.; Browning, Nigel D.

2012-10-12T23:59:59.000Z

144

View dependent fluid dynamics  

E-Print Network [OSTI]

VIEW DEPENDENT FLUID DYNAMICS A Thesis by BRIAN ARTHUR BARRAN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 2006 Major Subject: Visualization... Sciences VIEW DEPENDENT FLUID DYNAMICS A Thesis by BRIAN ARTHUR BARRAN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved by: Chair of Committee, Donald...

Barran, Brian Arthur

2006-08-16T23:59:59.000Z

145

Dissipative Dynamics of Enzymes  

Science Journals Connector (OSTI)

We explore enzyme conformational dynamics at sub-Å resolution, specifically, temperature effects. The ensemble-averaged mechanical response of the folded enzyme is viscoelastic in the whole temperature range between the warm and cold denaturation transitions. The dissipation parameter ? of the viscoelastic description decreases by a factor of 2 as the temperature is raised from 10 to 45?°C; the elastic parameter K shows a similar decrease. Thus, when probed dynamically, the enzyme softens for increasing temperature. Equilibrium mechanical experiments with the DNA spring (and a different enzyme) also show, qualitatively, a small softening for increasing temperature.

Amila Ariyaratne; Chenhao Wu; Chiao-Yu Tseng; Giovanni Zocchi

2014-11-04T23:59:59.000Z

146

Quantum spin dynamics  

E-Print Network [OSTI]

The classical Landau-Lifshitz equation has been derived from quantum mechanics. Starting point is the assumption of a non-Hermitian Hamilton operator to take the energy dissipation into account. The corresponding quantum mechanical time dependent Schr\\"odinger, Liouville and Heisenberg equation have been described and the similarities and differences between classical and quantum mechanical spin dynamics have been discussed. Furthermore, a time dependent Schr\\"odinger equation corresponding to the classical Landau-Lifshitz-Gilbert equation and two ways to include temperature into the quantum mechanical spin dynamics have been proposed.

Robert Wieser

2014-10-23T23:59:59.000Z

147

Electronic Spectroscopy & Dynamics  

SciTech Connect (OSTI)

The Gordon Research Conference (GRC) on Electronic Spectroscopy and Dynamics was held at Colby College, Waterville, NH from 07/19/2009 thru 07/24/2009. The Conference was well-attended with participants (attendees list attached). The attendees represented the spectrum of endeavor in this field coming from academia, industry, and government laboratories, both U.S. and foreign scientists, senior researchers, young investigators, and students. The GRC on Electronic Spectroscopy & Dynamics showcases some of the most recent experimental and theoretical developments in electronic spectroscopy that probes the structure and dynamics of isolated molecules, molecules embedded in clusters and condensed phases, and bulk materials. Electronic spectroscopy is an important tool in many fields of research, and this GRC brings together experts having diverse backgrounds in physics, chemistry, biophysics, and materials science, making the meeting an excellent opportunity for the interdisciplinary exchange of ideas and techniques. Topics covered in this GRC include high-resolution spectroscopy, biological molecules in the gas phase, electronic structure theory for excited states, multi-chromophore and single-molecule spectroscopies, and excited state dynamics in chemical and biological systems.

Mark Maroncelli, Nancy Ryan Gray

2010-06-08T23:59:59.000Z

148

Dynamic Modelling, Measurement and  

E-Print Network [OSTI]

Dynamic Modelling, Measurement and Control of Co-rotating Twin-Screw Extruders Justin Rae Elsey, B;Summary Co-rotating twin-screw extruders are unique and versatile machines that are used widely that these extruders are currently being optimally utilised. The most signi cant improvement to the eld of twin-screw

Fernandez, Thomas

149

NEWS & VIEWS Glass dynamics  

E-Print Network [OSTI]

NEWS & VIEWS Glass dynamics Diverging views on glass transition Gregory B. mc.mckenna@ttu.edu T he glass transition is one of the most intriguing phenomena in the world of soft condensed matter. Despite decades of study, many aspects of the behaviour of glass-forming liquids remain elusive

Weeks, Eric R.

150

Dynamics of acyclic interval maps  

E-Print Network [OSTI]

Vol. 6 (2009) Dynamics of acyclic interval maps [16] D.orbits and bifurcation of maps of the interval. SIAM J.Dynamics of acyclic interval maps Morris W. Hirsch He who

Hirsch, Morris W

2009-01-01T23:59:59.000Z

151

Models of Dynamical Supersymmetry Breaking  

E-Print Network [OSTI]

We review a class of models of dynamical supersymmetry breaking, and give a unified description of these models.

Lisa Randall

1997-06-23T23:59:59.000Z

152

1 Oceanus Magazine Vol. 42, No.2 2004 Woods Hole Oceanographic Institution oceanusmag.whoi.edu Most people know that oceans cover  

E-Print Network [OSTI]

) into Earth's interior. The largest and best exposed of these, the Oman ophiol- ite near the Persian Gulf at rock formations that were once beneath the seafloor.The largest ophiolite is in Oman near the Persian Gulf. PeterKelemen #12;2 Oceanus Magazine · Vol. 42, No.2 · 2004 Woods Hole Oceanographic Institution

153

Accelerated Molecular Dynamics Methods  

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

Dynamics Methods Dynamics Methods for Infrequent Events Arthur F. Voter Theoretical Division Los Alamos National Laboratory Los Alamos, New Mexico U.S. Department of Energy Theory Focus Session on Hydrogen Storage Materials Crystal City, VA May 18, 2006 Los Alamos Acknowledgments Blas P. Uberuaga (LANL, MST-8) Francesco Montalenti (U. Milano-Bicocca) Graeme Henkelman (U. Texas at Austin) Timothy C. Germann (LANL, X-7) James A. Sprague (NRL) Mads Sorensen (Novo Nordisk A/S, Copenhagen) Sriram Swaminarayan (LANL, MST-8) Steve Stuart (Clemson) David Sholl (Carnegie Mellon) John Hamilton (Sandia) Wolfgang Windl (Ohio State) Roger Smith (U. Loughborough) Robin Grimes (Imperial College) Kurt Sickafus (LANL, MST-8) Jacques Amar (U. Toledo) DOE Office of Basic Energy Sciences Motorola Intel Los Alamos Outline

154

Dynamic Adaptation using Xen  

SciTech Connect (OSTI)

The topic of virtualization has received renewed attention. Xen is a popular open source type-I hypervisor. The Xen hypervisor currently has limited capabilities for runtime modification to the core hypervisor, which impairs research into dynamic adaptation for system-level virtualization. This paper discusses recent investigations into the feasibility of extending Xen to support runtime adaptation for core hypervisor service, e.g., scheduler.

Naughton, III, Thomas J [ORNL; Vallee, Geoffroy R [ORNL; Scott, Stephen L [ORNL

2007-01-01T23:59:59.000Z

155

Oligocene climate dynamics  

E-Print Network [OSTI]

, Sweden Received 18 April 2004; revised 30 July 2004; accepted 20 September 2004; published 8 December 2004. [1] A planktonic and benthic foraminiferal stable isotope stratigraphy of the Oligocene equatorial Pacific (Ocean Drilling Program, Site 1218...: Paleoceanography; 9355 Information Related to Geographic Region: Pacific Ocean; KEYWORDS: Oligocene, stable isotopes, ice volume Citation: Wade, B. S., and H. Pa?like (2004), Oligocene climate dynamics, Paleoceanography, 19, PA4019, doi:10.1029/2004PA001042. 1...

Wade, Bridget S.; Palike, Heiko

156

Definition: Dynamic Interchange Schedule Or Dynamic Schedule | Open Energy  

Open Energy Info (EERE)

Schedule Or Dynamic Schedule Schedule Or Dynamic Schedule Jump to: navigation, search Dictionary.png Dynamic Interchange Schedule Or Dynamic Schedule A telemetered reading or value that is updated in real time and used as a schedule in the AGC/ACE equation and the integrated value of which is treated as a schedule for interchange accounting purposes. Commonly used for scheduling jointly owned generation to or from another Balancing Authority Area.[1] Related Terms balancing authority, balancing authority area, smart grid References ↑ Glossary of Terms Used in Reliability Standards An in LikeLike UnlikeLike You like this.Sign Up to see what your friends like. line Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Dynamic_Interchange_Schedule_Or_Dynamic_Schedule&oldid=502492

157

SDI: Statistical dynamic interactions  

SciTech Connect (OSTI)

We focus on the combined statistical and dynamical aspects of heavy ion induced reactions. The overall picture is illustrated by considering the reaction {sup 36}Ar + {sup 238}U at a projectile energy of 35 MeV/nucleon. We illustrate the time dependent bound excitation energy due to the fusion/relaxation dynamics as calculated with the Boltzmann master equation. An estimate of the mass, charge and excitation of an equilibrated nucleus surviving the fast (dynamic) fusion-relaxation process is used as input into an evaporation calculation which includes 20 heavy fragment exit channels. The distribution of excitations between residue and clusters is explicitly calculated, as is the further deexcitation of clusters to bound nuclei. These results are compared with the exclusive cluster multiplicity measurements of Kim et al., and are found to give excellent agreement. We consider also an equilibrated residue system at 25% lower initial excitation, which gives an unsatisfactory exclusive multiplicity distribution. This illustrates that exclusive fragment multiplicity may provide a thermometer for system excitation. This analysis of data involves successive binary decay with no compressional effects nor phase transitions. Several examples of primary versus final (stable) cluster decay probabilities for an A = 100 nucleus at excitations of 100 to 800 MeV are presented. From these results a large change in multifragmentation patterns may be understood as a simple phase space consequence, invoking neither phase transitions, nor equation of state information. These results are used to illustrate physical quantities which are ambiguous to deduce from experimental fragment measurements. 14 refs., 4 figs.

Blann, M.; Mustafa, M.G. (Lawrence Livermore National Lab., CA (USA)); Peilert, G.; Stoecker, H.; Greiner, W. (Frankfurt Univ. (Germany, F.R.). Inst. fuer Theoretische Physik)

1991-04-01T23:59:59.000Z

158

Perspective: Nonadiabatic dynamics theory  

Science Journals Connector (OSTI)

Nonadiabatic dynamics—nuclear motion evolving on multiple potential energy surfaces—has captivated the interest of chemists for decades. Exciting advances in experimentation and theory have combined to greatly enhance our understanding of the rates and pathways of nonadiabatic chemical transformations. Nevertheless there is a growing urgency for further development of theories that are practical and yet capable of reliable predictions driven by fields such as solar energy interstellar and atmospheric chemistry photochemistry vision single molecule electronics radiation damage and many more. This Perspective examines the most significant theoretical and computational obstacles to achieving this goal and suggests some possible strategies that may prove fruitful.

John C. Tully

2012-01-01T23:59:59.000Z

159

Dynamics of Charged Events  

SciTech Connect (OSTI)

In three spacetime dimensions the world volume of a magnetic source is a single point, an event. We make the event dynamical by regarding it as the imprint of a flux-carrying particle impinging from an extra dimension. This can be generalized to higher spacetime dimensions and to extended events. We exhibit universal observable consequences of the existence of events and argue that events are as important as particles or branes. We explain how events arise on the world volume of membranes in M theory, and in a Josephson junction in superconductivity.

Bachas, Constantin [Laboratoire de Physique Theorique de l'Ecole Normale Superieure, 24 rue Lhomond, 75231 Paris cedex (France); Bunster, Claudio [Centro de Estudios Cientificos (CECS), Avenida Arturo Prat 514, Valdivia (Chile); Henneaux, Marc [Physique Theorique et Mathematique, Universite Libre de Bruxelles and International Solvay Institutes, ULB Campus Plaine C.P. 231, 1050 Bruxelles (Belgium); Centro de Estudios Cientificos (CECS), Avenida Arturo Prat 514, Valdivia (Chile)

2009-08-28T23:59:59.000Z

160

Heat transfer dynamics  

SciTech Connect (OSTI)

As heat transfer technology increases in complexity, it becomes more difficult for those without thermal dynamics engineering training to choose between competitive heat transfer systems offered to meet their drying requirements. A step back to the basics of heat transfer can help professional managers and papermakers make informed decisions on alternative equipment and methods. The primary forms of heat and mass transfer are reviewed with emphasis on the basics, so a practical understanding of each is gained. Finally, the principles and benefits of generating infrared energy by combusting a gaseous hydrocarbon fuel are explained.

Smith, T.M. (Marsden, Inc., Pennsauken, NJ (United States))

1994-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Gas-Phase Molecular Dynamics  

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

Gas-Phase Molecular Dynamics Gas-Phase Molecular Dynamics The Gas-Phase Molecular Dynamics Group is dedicated to developing and applying spectroscopic and theoretical tools to challenging problems in chemical physics related to reactivity, structure, dynamics and kinetics of transient species. Recent theoretical work has included advances in exact variational solution of vibrational quantum dynamics, suitable for up to five atoms in systems where large amplitude motion or multiple strongly coupled modes make simpler approximations inadequate. Other theoretical work, illustrated below, applied direct dynamics, quantum force trajectory calculations to investigate a series of reactions of the HOCO radical. The potential energy surface for the OH + CO/ H + CO2 reaction, showing two barriers (TS1 and TS2) and the deep HOCO well along the minimum energy pathway. The inset figure shows the experimental and calculated reactivity of HOCO with selected collision partners. See J.S. Francisco, J.T. Muckerman and H.-G. Yu, "HOCO radical chemistry,"

162

Nuclear Matter and Nuclear Dynamics  

E-Print Network [OSTI]

Highlights on the recent research activity, carried out by the Italian Community involved in the "Nuclear Matter and Nuclear Dynamics" field, will be presented.

M Colonna

2009-02-26T23:59:59.000Z

163

Dynamic simulation of Odoo  

Science Journals Connector (OSTI)

Abstract The thermal habits of Odoo were examined and energy consumption data were also predicted. Special tests were performed for the time of the competition, and whole year was also analysed. The climatic data were of Madrid as the competition took place there. The modelling environment was MATLAB's Simulink with a built-in module of Simscape. It is for especially examining thermal behaviours. MATLAB itself is capable of solving differential equations by time, for this reason dynamic simulations can be performed. First the building structure was created, and then the heatflows affecting the internal temperature were added. In this paper detailed process of creating the model is presented, and some results are discussed, including some possibilities of further improvements.

Gábor Haas-Schnabel; Csaba Szikra

2014-01-01T23:59:59.000Z

164

Atmospheric Dynamics of Exoplanets  

E-Print Network [OSTI]

The characterization of exoplanetary atmospheres has come of age in the last decade, as astronomical techniques now allow for albedos, chemical abundances, temperature profiles and maps, rotation periods and even wind speeds to be measured. Atmospheric dynamics sets the background state of density, temperature and velocity that determines or influences the spectral and temporal appearance of an exoplanetary atmosphere. Hot exoplanets are most amenable to these characterization techniques; in the present review, we focus on highly-irradiated, large exoplanets (the "hot Jupiters"), as astronomical data begin to confront theoretical questions. We summarize the basic atmospheric quantities inferred from the astronomical observations. We review the state of the art by addressing a series of current questions and look towards the future by considering a separate set of exploratory questions. Attaining the next level of understanding will require a concerted effort of constructing multi-faceted, multi-wavelength dat...

Heng, Kevin

2014-01-01T23:59:59.000Z

165

Probing Single-Molecule Protein Conformational Dynamics. | EMSL  

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

Single-Molecule Protein Conformational Dynamics. Probing Single-Molecule Protein Conformational Dynamics. Abstract: Protein conformational fluctuations and dynamics, often...

166

Risk Price Dynamics Jaroslav Borovicka  

E-Print Network [OSTI]

Risk Price Dynamics Jaroslav Borovicka University of Chicago Lars Peter Hansen University November 11, 2009 Abstract We present a novel approach to depicting asset pricing dynamics by characterizing shock exposures and prices for alternative investment horizons. We quantify the shock exposures

Hansen, Lars Peter

167

Extremes in Chaotic Dynamical Systems  

E-Print Network [OSTI]

Extremes in Chaotic Dynamical Systems Valerio Lucarini valerio.lucarini@uni-hamburg.de D. Faranda Vortragsthema Datum #12;1. Introduction 2. Classical Theory: Extreme Values for i.i.d. Variables 3. Extreme Values in Dynamical Systems: Theoretical Background 4. Numerical Algorithms for studying Extremes 5

168

Status of dynamical ensemble generation  

E-Print Network [OSTI]

I give an overview of current and future plans of dynamical QCD ensemble generation activities. A comparison of simulation cost between different discretizations is made. Recent developments in techniques and algorithms used in QCD dynamical simulations, especially mass reweighting, are also discussed.

Chulwoo Jung

2010-01-06T23:59:59.000Z

169

Dynamical decoupling induced renormalization of the non-Markovian dynamics  

E-Print Network [OSTI]

In this work we develop a numerical framework to investigate the renormalization of the non-Markovian dynamics of an open quantum system to which dynamical decoupling is applied. We utilize a non-Markovian master equation which is derived from the non-Markovian quantum trajectories formalism. It contains incoherent Markovian dynamics and coherent Schr\\"odinger dynamics as its limiting cases and is capable of capture the transition between them. We have performed comprehensive simulations for the cases in which the system is either driven by the Ornstein-Uhlenbeck noise or or is described by the spin-boson model. The renormalized dynamics under bang-bang control and continuous dynamical decoupling are simulated. Our results indicate that the renormalization of the non-Markovian dynamics depends crucially on the spectral density of the environment and the envelop of the decoupling pulses. The framework developed in this work hence provides an unified approach to investigate the efficiency of realistic decoupling pulses. This work also opens a way to further optimize the decoupling via pulse shaping.

Pochung Chen

2006-09-28T23:59:59.000Z

170

An experimental investigation of the dynamics of submarine leveed channel initiation as sediment-laden density currents experience sudden unconfinement  

SciTech Connect (OSTI)

Leveed submarine channels play a critical role in the transfer of sediment from the upper continental slopes to interslope basins and ultimately deepwater settings. Despite a reasonable understanding of how these channels grow once established, how such channels initiate on previously unchannelized portions of the seafloor remains poorly understood. We conducted a series of experiments that elucidate the influence of excess density relative to flow velocity on the dynamics of, and depositional morphologies arising from, density currents undergoing sudden unconfinement across a sloped bed. Experimental currents transported only suspended sediment across a non-erodible substrate. Under flow conditions ranging from supercritical to subcritical (bulk Richardson numbers of 0.02 to 1.2) our experiments failed to produce deposits resembling or exhibiting the potential to evolve into self-formed leveed channels. In the absence of excess density, a submerged sediment-laden flow produced sharp crested lateral deposits bounding the margins of the flow for approximately a distance of two outlet widths down basin. These lateral deposits terminated in a centerline deposit that greatly exceeded marginal deposits in thickness. As excess density increased relative to the outlet velocity, the rate of lateral spreading of the flow increased relative to the downstream propagation of the density current, transitioning from a narrow flow aligned with the channel outlet to a broad radially expanding flow. Coincident with these changes in flow dynamics, the bounding lateral deposits extended for shorter distances, had lower, more poorly defined crests that were increasingly wider in separation than the initial outlet, and progressively became more oblong rather than linear. Based on our results, we conclude that leveed channels cannot initiate from sediment-laden density currents under strictly depositional conditions. Partial confinement of these currents appears to be necessary to establish the hydrodynamic conditions needed for sediment deposition along the margins of a density current which ultimately may evolve into confining levees. We suggest that erosion into a previously unchannelized substrate is the mostly likely source of this partial confinement.

Rowland, Joel C [Los Alamos National Laboratory; Hilley, George E [STANFORD UNIV; Fildani, Andrea [CHEVRON ETC

2009-01-01T23:59:59.000Z

171

Seasonality and dynamics of whooping cough.  

E-Print Network [OSTI]

??Whooping cough (pertussis) dynamics provide an interesting disease ecology case study. Unlike other childhood diseases, the observed patterns of pertussis dynamics are found very diverse… (more)

Nguyen, Hanh Thi Hong

2007-01-01T23:59:59.000Z

172

Dynamic Worldwide Solar Energy | Open Energy Information  

Open Energy Info (EERE)

Worldwide Solar Energy Jump to: navigation, search Name: Dynamic Worldwide Solar Energy Sector: Solar Product: US-based solar developer and financer. References: Dynamic Worldwide...

173

16.07 Dynamics, Fall 2004  

E-Print Network [OSTI]

Dynamics starts with fundamentals of Newtonian mechanics. Further topics include kinematics, particle dynamics, motion relative to accelerated reference frames, work and energy, impulse and momentum, systems of particles ...

Peraire, Jaume

174

Soil Machine Dynamics Ltd | Open Energy Information  

Open Energy Info (EERE)

Dynamics Ltd Jump to: navigation, search Name: Soil Machine Dynamics Ltd Region: United Kingdom Sector: Marine and Hydrokinetic Website: http:http:smd.co.ukproduc This company...

175

Hamilton Dynamics on Clifford Kaehler Manifolds  

E-Print Network [OSTI]

This paper presents Hamilton dynamics on Clifford Kaeler manifolds. In the end, the some results related to Clifford Kaehler dynamical systems are also discussed.

Mehmet Tekkoyun

2009-02-24T23:59:59.000Z

176

THz Carrier Dynamics in Epitaxial Graphene  

Science Journals Connector (OSTI)

Ultrafast optical pump/THz-probe spectroscopy is used to measure the conductivity recovery dynamics in epitaxial graphene. The observed dynamics are insensitive to probe frequency,...

Divin, Charles J; Sun, Dong; Berger, Claire; de Heer, Walt; First, P N; Norris, Theodore B

177

Fermionic Molecular Dynamics for nuclear dynamics and thermodynamics  

E-Print Network [OSTI]

A new Fermionic Molecular Dynamics (FMD) model based on a Skyrme functional is proposed in this paper. After introducing the basic formalism, some first applications to nuclear structure and nuclear thermodynamics are presented

K. H. O. Hasnaoui; Ph. Chomaz; F. Gulminelli

2008-12-02T23:59:59.000Z

178

Computational fluid dynamic applications  

SciTech Connect (OSTI)

The rapid advancement of computational capability including speed and memory size has prompted the wide use of computational fluid dynamics (CFD) codes to simulate complex flow systems. CFD simulations are used to study the operating problems encountered in system, to evaluate the impacts of operation/design parameters on the performance of a system, and to investigate novel design concepts. CFD codes are generally developed based on the conservation laws of mass, momentum, and energy that govern the characteristics of a flow. The governing equations are simplified and discretized for a selected computational grid system. Numerical methods are selected to simplify and calculate approximate flow properties. For turbulent, reacting, and multiphase flow systems the complex processes relating to these aspects of the flow, i.e., turbulent diffusion, combustion kinetics, interfacial drag and heat and mass transfer, etc., are described in mathematical models, based on a combination of fundamental physics and empirical data, that are incorporated into the code. CFD simulation has been applied to a large variety of practical and industrial scale flow systems.

Chang, S.-L.; Lottes, S. A.; Zhou, C. Q.

2000-04-03T23:59:59.000Z

179

Dynamics of dark energy  

E-Print Network [OSTI]

In this paper we review in detail a number of approaches that have been adopted to try and explain the remarkable observation of our accelerating Universe. In particular we discuss the arguments for and recent progress made towards understanding the nature of dark energy. We review the observational evidence for the current accelerated expansion of the universe and present a number of dark energy models in addition to the conventional cosmological constant, paying particular attention to scalar field models such as quintessence, K-essence, tachyon, phantom and dilatonic models. The importance of cosmological scaling solutions is emphasized when studying the dynamical system of scalar fields including coupled dark energy. We study the evolution of cosmological perturbations allowing us to confront them with the observation of the Cosmic Microwave Background and Large Scale Structure and demonstrate how it is possible in principle to reconstruct the equation of state of dark energy by also using Supernovae Ia observational data. We also discuss in detail the nature of tracking solutions in cosmology, particle physics and braneworld models of dark energy, the nature of possible future singularities, the effect of higher order curvature terms to avoid a Big Rip singularity, and approaches to modifying gravity which leads to a late-time accelerated expansion without recourse to a new form of dark energy.

Edmund J. Copeland; M. Sami; Shinji Tsujikawa

2006-06-16T23:59:59.000Z

180

Synchronized dynamic dose reconstruction  

SciTech Connect (OSTI)

Variations in target volume position between and during treatment fractions can lead to measurable differences in the dose distribution delivered to each patient. Current methods to estimate the ongoing cumulative delivered dose distribution make idealized assumptions about individual patient motion based on average motions observed in a population of patients. In the delivery of intensity modulated radiation therapy (IMRT) with a multi-leaf collimator (MLC), errors are introduced in both the implementation and delivery processes. In addition, target motion and MLC motion can lead to dosimetric errors from interplay effects. All of these effects may be of clinical importance. Here we present a method to compute delivered dose distributions for each treatment beam and fraction, which explicitly incorporates synchronized real-time patient motion data and real-time fluence and machine configuration data. This synchronized dynamic dose reconstruction method properly accounts for the two primary classes of errors that arise from delivering IMRT with an MLC: (a) Interplay errors between target volume motion and MLC motion, and (b) Implementation errors, such as dropped segments, dose over/under shoot, faulty leaf motors, tongue-and-groove effect, rounded leaf ends, and communications delays. These reconstructed dose fractions can then be combined to produce high-quality determinations of the dose distribution actually received to date, from which individualized adaptive treatment strategies can be determined.

Litzenberg, Dale W.; Hadley, Scott W.; Tyagi, Neelam; Balter, James M.; Ten Haken, Randall K.; Chetty, Indrin J. [University of Michigan, Ann Arbor, Michigan 48109 (United States)

2007-01-15T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Dynamical Properties of Interaction Data  

E-Print Network [OSTI]

Network dynamics are typically presented as a time series of network properties captured at each period. The current approach examines the dynamical properties of transmission via novel measures on an integrated, temporally extended network representation of interaction data across time. Because it encodes time and interactions as network connections, static network measures can be applied to this "temporal web" to reveal features of the dynamics themselves. Here we provide the technical details and apply it to agent-based implementations of the well-known SEIR and SEIS epidemiological models.

Bramson, Aaron

2015-01-01T23:59:59.000Z

182

A Dynamical Approach to Temperature  

E-Print Network [OSTI]

We present a new dynamical approach for measuring the temperature of a Hamiltonian dynamical system in the micro canonical ensemble of thermodynamics. We show that under the hypothesis of ergodicity the temperature can be computed as a time-average of the functional, div(grad H/|grad H|^2), on the energy-surface. Our method not only yields an efficient computational approach for determining the temperature it also provides an intrinsic link between dynamical systems theory and the statistical mechanics of Hamiltonian systems.

Hans Henrik Rugh

1997-01-30T23:59:59.000Z

183

LANL | Physics | Dynamic Plutonium Experiments  

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

Dynamic plutonium experiments Dynamic plutonium experiments Since the end of nuclear testing the nation has had to rely on sophisticated computer models to ensure the safety and reliability of the nuclear weapons stockpile. This program is known as science-based stockpile stewardship. Despite possessing the world's fastest computers and most advanced modeling capability, the behavior of materials under dynamic loads that occur in a nuclear weapon are difficult to accurately model. The Dynamic Plutonium experimental program carries out experiments at the Nevada National Security Site on plutonium driven by high explosives. These experiments are needed to measure and understand the behavior of plutonium under extreme conditions. Physics Division has unique capabilities in high-speed x-ray imaging and velocimetry (measuring the

184

THz Dynamic Nuclear Polarization NMR  

E-Print Network [OSTI]

Dynamic nuclear polarization (DNP) increases the sensitivity of nuclear magnetic resonance (NMR) spectroscopy by using high frequency microwaves to transfer the polarization of the electrons to the nuclear spins. The ...

Nanni, Emilio Alessandro

185

Predictive Models of Forest Dynamics  

Science Journals Connector (OSTI)

...currently highly uncertain (Fig. 1), making vegetation dynamics one of the largest sources of uncertainty in Earth system models. Reducing this uncertainty requires work on several fronts. For example, physiological parameters need to be...

Drew Purves; Stephen Pacala

2008-06-13T23:59:59.000Z

186

Gas-phase chemical dynamics  

SciTech Connect (OSTI)

Research in this program is directed towards the spectroscopy of small free radicals and reactive molecules and the state-to-state dynamics of gas phase collision, energy transfer, and photodissociation phenomena. Work on several systems is summarized here.

Weston, R.E. Jr.; Sears, T.J.; Preses, J.M. [Brookhaven National Laboratory, Upton, NY (United States)

1993-12-01T23:59:59.000Z

187

Dynamic systems and subadditive functionals  

E-Print Network [OSTI]

Consider a problem where a number of dynamic systems are required to travel between points in minimum time. The study of this problem is traditionally divided into two parts: A combinatorial part that assigns points to ...

Itani, Sleiman M

2009-01-01T23:59:59.000Z

188

Actin Dynamics in Aspergillus nidulans  

E-Print Network [OSTI]

used to label all three actin structures in fungi. Lifeact is a 17 amino acid peptide derived from the Saccharomyces cerevisiae actin binding protein Abp140p. To better understand actin dynamics in living cells, A. nidulans was transformed...

Quintanilla, Laura

2013-04-08T23:59:59.000Z

189

Cluster Dynamics of Planetary Waves  

E-Print Network [OSTI]

The dynamics of nonlinear atmospheric planetary waves is determined by a small number of independent wave clusters consisting of a few connected resonant triads. We classified the different types of connections between neighboring triads that determine the general dynamics of a cluster. Each connection type corresponds to substantially different scenarios of energy flux among the modes. The general approach can be applied directly to various mesoscopic systems with 3-mode interactions, encountered in hydrodynamics, astronomy, plasma physics, chemistry, medicine, etc.

Elena Kartashova; Victor S. L'vov

2008-11-05T23:59:59.000Z

190

Dynamic roughening of directed lines  

Science Journals Connector (OSTI)

We study the fluctuations of a stretched string, e.g., a vortex line, moving in a random medium. A pair of nonlinear equations are proposed to describe the evolution of longitudinal and transverse coordinates. The dynamic scaling of the fluctuations is studied analytically (by renormalization group) and numerically. In most cases the fluctuations are superdiffusive, governed by a dynamic exponent z=3/2.

Deniz Erta? and Mehran Kardar

1992-08-10T23:59:59.000Z

191

HAWT performance with dynamic stall  

SciTech Connect (OSTI)

In this report we calculated the effects of flow nonuniformities (wing shear, tower wake, yaw, and large-scale turbulence) on the performance of a horizontal axis wind turbine, accounting for dynamic stall. We modified the PROP program to incorporate and compare these effects with the uniform flow case. The MIT model, which predicts dynamic lift coefficients substantially higher than the static maximum values and includes a crude model of the vortex roll-off phenomenon, represented dynamic stall. As associated model for drag was also used. The dynamic stall model was tested against experimental data for three typical reduced frequencies. Good instantaneous correlation was obtained. The effects of nonuniformities with and without the dynamic stall were calculated using the Westinghouse Mod O and Enertech 44/25 turbines. Modeling the dynamic stall has little effect on performance. Furthermore, the performance with nonuniform flow differed only slightly from the uniform flow case. Thus the now PROP model provides a powerful general capability to handle nonuniform flows.

Hibbs, B.D.

1986-02-01T23:59:59.000Z

192

Nonstatistical dynamics on the caldera  

E-Print Network [OSTI]

We explore both classical and quantum dynamics of a model potential exhibiting a caldera: that is, a shallow potential well with two pairs of symmetry related index one saddles associated with entrance/exit channels. Classical trajectory simulations at several different energies confirm the existence of the `dynamical matching' phenomenon originally proposed by Carpenter, where the momentum direction associated with an incoming trajectory initiated at a high energy saddle point determines to a considerable extent the outcome of the reaction (passage through the diametrically opposing exit channel). By studying a `stretched' version of the caldera model, we have uncovered a generalized dynamical matching: bundles of trajectories can reflect off a hard potential wall so as to end up exiting predominantly through the transition state opposite the reflection point. We also investigate the effects of dissipation on the classical dynamics. In addition to classical trajectory studies, we examine the dynamics of quantum wave packets on the caldera potential (stretched and unstretched). These computations reveal a quantum mechanical analogue of the `dynamical matching' phenomenon, where the initial expectation value of the momentum direction for the wave packet determines the exit channel through which most of the probability density passes to product.

Peter Collins; Zeb C. Kramer; Barry K. Carpenter; Gregory S. Ezra; Stephen Wiggins

2014-05-09T23:59:59.000Z

193

Experimental studies on passive dynamic bipedal walking  

Science Journals Connector (OSTI)

Passive dynamic walking is a gait developed, partially or in whole, by the energy provided by gravity. The research on passive dynamic bipedal walking helps create an understanding of walking mechanics. Moreover, the experimental passive dynamic research ... Keywords: Design and testing, Experiment, Gait patterns, Passive dynamic walking, Treadmill

Kazi Rushdi, Derek Koop, Christine Q. Wu

2014-04-01T23:59:59.000Z

194

SOM 825 Advanced Mathematical Programming: Dynamic Network Systems  

E-Print Network [OSTI]

, dynamic spatial price equilibrium problems, dynamic transportation problems (both fixed and elastic demand Formulation Dynamic Financial Network Models Dynamic Traffic Network Models and Algorithms ** Elastic Demand (Classical and Spatial) Dynamic Spatial Price Models and Algorithms ** Quantity Formulation ** Price

Nagurney, Anna

195

Simple Dynamic Gasifier Model That Runs in Aspen Dynamics  

SciTech Connect (OSTI)

Gasification (or partial oxidation) is a vital component of 'clean coal' technology. Sulfur and nitrogen emissions can be reduced, overall energy efficiency is increased, and carbon dioxide recovery and sequestration are facilitated. Gasification units in an electric power generation plant produce a fuel for driving combustion turbines. Gasification units in a chemical plant generate gas, which can be used to produce a wide spectrum of chemical products. Future plants are predicted to be hybrid power/chemical plants with gasification as the key unit operation. The widely used process simulator Aspen Plus provides a library of models that can be used to develop an overall gasifier model that handles solids. So steady-state design and optimization studies of processes with gasifiers can be undertaken. This paper presents a simple approximate method for achieving the objective of having a gasifier model that can be exported into Aspen Dynamics. The basic idea is to use a high molecular weight hydrocarbon that is present in the Aspen library as a pseudofuel. This component should have the same 1:1 hydrogen-to-carbon ratio that is found in coal and biomass. For many plantwide dynamic studies, a rigorous high-fidelity dynamic model of the gasifier is not needed because its dynamics are very fast and the gasifier gas volume is a relatively small fraction of the total volume of the entire plant. The proposed approximate model captures the essential macroscale thermal, flow, composition, and pressure dynamics. This paper does not attempt to optimize the design or control of gasifiers but merely presents an idea of how to dynamically simulate coal gasification in an approximate way.

Robinson, P.J.; Luyben, W.L. [Lehigh University, Bethlehem, PA (United States). Dept. of Chemical Engineering

2008-10-15T23:59:59.000Z

196

Modeling Molecular Dynamics from Simulations  

SciTech Connect (OSTI)

Many important processes in biology occur at the molecular scale. A detailed understanding of these processes can lead to significant advances in the medical and life sciences. For example, many diseases are caused by protein aggregation or misfolding. One approach to studying these systems is to use physically-based computational simulations to model the interactions and movement of the molecules. While molecular simulations are computationally expensive, it is now possible to simulate many independent molecular dynamics trajectories in a parallel fashion by using super- or distributed- computing methods such as Folding@Home or Blue Gene. The analysis of these large, high-dimensional data sets presents new computational challenges. In this seminar, I will discuss a novel approach to analyzing large ensembles of molecular dynamics trajectories to generate a compact model of the dynamics. This model groups conformations into discrete states and describes the dynamics as Markovian, or history-independent, transitions between the states. I will discuss why the Markovian state model (MSM) is suitable for macromolecular dynamics, and how it can be used to answer many interesting and relevant questions about the molecular system. I will also discuss many of the computational and statistical challenges in building such a model, such as how to appropriately cluster conformations, determine the statistical reliability, and efficiently design new simulations.

Hinrichs, Nina Singhal (University of Chicago) [University of Chicago

2009-01-28T23:59:59.000Z

197

Fissile solution dynamics: Student research  

SciTech Connect (OSTI)

There are two research projects in criticality safety at the University of Arizona: one in dynamic simulation of hypothetical criticality accidents in fissile solutions, and one in criticality benchmarks using transport theory. We have used the data from nuclear excursions in KEWB, CRAC, and SILENE to help in building models for solution excursions. An equation of state for liquids containing gas bubbles has been developed and coupled to point-reactor dynamics in an attempt to predict fission rate, yield, pressure, and kinetic energy. It appears that radiolytic gas is unimportant until after the first peak, but that it does strongly affect the shape of the subsequent power decrease and also the dynamic pressure.

Hetrick, D.L.

1994-09-01T23:59:59.000Z

198

Dynamical 3-Space: Emergent Gravity  

E-Print Network [OSTI]

The laws of gravitation devised by Newton, and by Hilbert and Einstein, have failed many experimental and observational tests, namely the bore hole g anomaly, flat rotation curves for spiral galaxies, supermassive black hole mass spectrum, uniformly expanding universe, cosmic filaments, laboratory G measurements, galactic EM bending, precocious galaxy formation,.. The response has been the introduction of the new epicycles: ``dark matter", ``dark energy", and others. To understand gravity we must restart with the experimental discoveries by Galileo, and following a heuristic argument we are led to a uniquely determined theory of a dynamical 3-space. That 3-space exists has been missed from the beginning of physics, although it was 1st directly detected by Michelson and Morley in 1887. Uniquely generalising the quantum theory to include this dynamical 3-space we deduce the response of quantum matter and show that it results in a new account of gravity, and explains the above anomalies and others. The dynamical...

Cahill, Reginald T

2011-01-01T23:59:59.000Z

199

Dynamics of Block Copolymer Nanocomposites  

SciTech Connect (OSTI)

A detailed study of the dynamics of cadmium sulfide nanoparticles suspended in polystyrene homopolymer matrices was carried out using X-ray photon correlation spectroscopy for temperatures between 120 and 180 °C. For low molecular weight polystyrene homopolymers, the observed dynamics show a crossover from diffusive to hyper-diffusive behavior with decreasing temperatures. For higher molecular weight polystyrene, the nanoparticle dynamics appear hyper-diffusive at all temperatures studied. The relaxation time and characteristic velocity determined from the measured hyper-diffusive dynamics reveal that the activation energy and underlying forces determined are on the order of 2.14 × 10?19 J and 87 pN, respectively. We also carried out a detailed X-ray scattering study of the static and dynamic behavior of a styrene– isoprene diblock copolymer melt with a styrene volume fraction of 0.3468. At 115 and 120 °C, we observe splitting of the principal Bragg peak, which we attribute to phase coexistence of hexagonal cylindrical and cubic double- gyroid structure. In the disordered phase, above 130 °C, we have characterized the dynamics of composition fluctuations via X-ray photon correlation spectroscopy. Near the peak of the static structure factor, these fluctuations show stretched-exponential relaxations, characterized by a stretching exponent of about 0.36 for a range of temperatures immediately above the MST. The corresponding characteristic relaxation times vary exponentially with temperature, changing by a factor of 2 for each 2 °C change in temperature. At low wavevectors, the measured relaxations are diffusive with relaxation times that change by a factor of 2 for each 8 °C change in temperature.

Mochrie, Simon G. J.

2014-09-09T23:59:59.000Z

200

Dynamical model of Ising spins  

Science Journals Connector (OSTI)

A two-dimensional dynamical model of Ising spins is introduced. Since we were not able to define energy in our system, we introduced an object called the disagreement function. This function controls the dynamics—minimizing it locally we decide upon spin flipping. Amazingly, local minimization of the disagreement function can lead to an increase of its global value. We present the phase diagram of the system and show that exactly the same initial conditions can lead the system to one of several, completely different final steady states.

Katarzyna Sznajd-Weron

2004-09-30T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Fairness and dynamic pricing: comments  

SciTech Connect (OSTI)

In ''The Ethics of Dynamic Pricing,'' Ahmad Faruqui lays out a case for improved efficiency in using dynamic prices for retail electricity tariffs and addresses various issues about the distributional effects of alternative pricing mechanisms. The principal contrast is between flat or nearly constant energy prices and time-varying prices that reflect more closely the marginal costs of energy and capacity. The related issues of fairness criteria, contracts, risk allocation, cost allocation, means testing, real-time pricing, and ethical policies of electricity market design also must be considered. (author)

Hogan, William W.

2010-07-15T23:59:59.000Z

202

Model system for slow dynamics  

Science Journals Connector (OSTI)

Systems whose dynamics are described by a quasilogarithmic or stretched-exponential time dependence are usually fitted by models which use disorder to create a distribution of relaxation times. Here we describe a model which decays slowly towards equilibrium but does not require disorder to provide the slow dynamics. The model consists of a spin system with the spins interacting via the dipole-dipole interaction. The model is able to replicate the more pronounced features observed in the magnetization decay of magnetic systems and high-temperature superconductors.

D. K. Lottis; R. M. White; E. Dan Dahlberg

1991-07-15T23:59:59.000Z

203

Dynamic Conductance of Carbon Nanotubes  

Science Journals Connector (OSTI)

The dynamic conductance of carbon nanotubes was investigated using the nonequilibrium Green's function formalism within the context of a tight-binding model. Specifically, we have studied the ac response of tubes of different helicities, both with and without defects, and an electronic heterojunction. Because of the induced displacement currents, the dynamic conductance of the nanotubes differs significantly from the dc conductance displaying both capacitive and inductive responses. The important role of photon-assisted transport through nanotubes is revealed and its implications for experiments discussed.

Christopher Roland; Marco Buongiorno Nardelli; Jian Wang; Hong Guo

2000-03-27T23:59:59.000Z

204

Theoretical studies of combustion dynamics  

SciTech Connect (OSTI)

The basic objectives of this research program are to develop and apply theoretical techniques to fundamental dynamical processes of importance in gas-phase combustion. There are two major areas currently supported by this grant. One is reactive scattering of diatom-diatom systems, and the other is the dynamics of complex formation and decay based on L{sup 2} methods. In all of these studies, the authors focus on systems that are of interest experimentally, and for which potential energy surfaces based, at least in part, on ab initio calculations are available.

Bowman, J.M. [Emory Univ., Atlanta, GA (United States)

1993-12-01T23:59:59.000Z

205

Glassy dynamics of protein folding  

Science Journals Connector (OSTI)

A coarse-grained model of a random polypeptide chain, with only discrete torsional degrees of freedom and Hookean springs connecting pairs of hydrophobic residues is shown to display stretched exponential relaxation under Metropolis dynamics at low temperatures with the exponent ??1/4, in agreement with the best experimental results. The time dependent correlation functions for fluctuations about the native state, computed in the Gaussian approximation for real proteins, have also been found to have the same functional form. Our results indicate that the energy landscape exhibits universal features over a very large range of energies and is relatively independent of the specific dynamics.

Erkan Tüzel and Ay?e Erzan

2000-02-01T23:59:59.000Z

206

Cluster dynamics transcending chemical dynamics toward nuclear fusion  

Science Journals Connector (OSTI)

...chemical dynamics toward nuclear fusion 10.1073/pnas.0508622103...optimization of table-top dd nuclear fusion driven by CE of deuterium containing...Huizenga J. R. ( 1992 ) Cold Fusion ( Oxford Univ. Press , Oxford...R. H. ( 1960 ) Controlled Thermonuclear Reactions ( Van Nostrand , New...

Andreas Heidenreich; Joshua Jortner; Isidore Last

2006-01-01T23:59:59.000Z

207

The Dynamics of Syntactic Knowledge  

Science Journals Connector (OSTI)

......Original Articles The Dynamics of Syntactic Knowledge Thomas agotnes Department of Informatics...logical omniscience problem by taking knowledge as primary rather than as defined in...1Introduction The most studied formal logics of knowledge and belief, epistemic and doxastic logics1......

Thomas Ågotnes; Natasha Alechina

2007-02-01T23:59:59.000Z

208

Dynamical friction on satellite galaxies  

E-Print Network [OSTI]

For a rigid model satellite, Chandrasekhar's dynamical friction formula describes the orbital evolution quite accurately, when the Coulomb logarithm is chosen appropriately. However, it is not known if the orbital evolution of a real satellite with the internal degree of freedom can be described by the dynamical friction formula. We performed N-body simulation of the orbital evolution of a self-consistent satellite galaxy within a self-consistent parent galaxy. We found that the orbital decay of the simulated satellite is significantly faster than the estimate from the dynamical friction formula. The main cause of this discrepancy is that the stars stripped out of the satellite are still close to the satellite, and increase the drag force on the satellite through two mechanisms. One is the direct drag force from particles in the trailing tidal arm, a non-axisymmetric force that slows the satellite down. The other is the indirect effect that is caused by the particles remaining close to the satellite after escape. The force from them enhances the wake caused in the parent galaxy by dynamical friction, and this larger wake in turn slows the satellite down more than expected from the contribution of its bound mass. We found these two have comparable effects, and the combined effect can be as large as 20% of the total drag force on the satellite.

Michiko Fujii; Yoko Funato; Junichiro Makino

2005-11-22T23:59:59.000Z

209

LECTURES IN ELEMENTARY FLUID DYNAMICS  

E-Print Network [OSTI]

LECTURES IN ELEMENTARY FLUID DYNAMICS: Physics, Mathematics and Applications J. M. McDonough Departments of Mechanical Engineering and Mathematics University of Kentucky, Lexington, KY 40506-0503 c 1987, 1990, 2002, 2004, 2009 #12;Contents 1 Introduction 1 1.1 Importance of Fluids

McDonough, James M.

210

Knots and dynamics tienne Ghys  

E-Print Network [OSTI]

was the starting point of the (now forgotten) theory of "vortex atoms", trying to explain elementary "atoms-hydrodynamics: the dynamics of electrically conducting fluids (like a plasma). If one assumes that the fluid is perfect and has no resistance (ideal MHD), the magnetic (divergence free) vector field is merely tran

Ghys, Ã?tienne

211

Theory of the dynamics of  

E-Print Network [OSTI]

possible units??) q, the catchability coefficient: ...is defined as the proportion of the total stock over time, we can also keep track of the change in biomass (B), using the same model but substituting B for N: This might represent the dynamics of an unexploited fish stock... To add exploitation onto this

Limburg, Karin E.

212

Dynamical Theory of K Mesons  

Science Journals Connector (OSTI)

Considerations leading to a complete dynamical theory of K particles and hyperons are outlined. The theory exploits several points of analogy between the ? field and the electromagnetic field, and gives a qualitatively satisfactory description of a number of phenomena. In particular, it accounts for the variety of K-particle decay modes, including those exhibiting opposite parity.

Julian Schwinger

1956-11-15T23:59:59.000Z

213

An API for dynamic partial evaluation under DynamoRIO  

E-Print Network [OSTI]

Dynamic optimization systems have available runtime (dynamic) data and can cross more boundaries than traditional static optimization systems in the pursuit of program transformations. However, dynamic optimization systems ...

Leger, Christopher, 1981-

2004-01-01T23:59:59.000Z

214

DLFM library tools for large scale dynamic applications.  

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

DLFM library tools for large scale dynamic applications DLFM library tools for large scale dynamic applications Large scale Python and other dynamic applications may spend huge...

215

SciTech Connect: Hot electron dynamics in graphene  

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

ThesisDissertation: Hot electron dynamics in graphene Citation Details In-Document Search Title: Hot electron dynamics in graphene Hot electron dynamics in graphene Graphene, a...

216

Benzene Dimer: Dynamic Structure and Thermodynamics Derived from...  

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

Benzene Dimer: Dynamic Structure and Thermodynamics Derived from On-the-Fly ab initio DFT-D Molecular Dynamic Simulations. Benzene Dimer: Dynamic Structure and Thermodynamics...

217

Geophysical Fluid Dynamics Laboratory Presented by  

E-Print Network [OSTI]

Dynamics Laboratory Outline: · Introduction · Software Infrastructure Projects: Completed Current consortium for climate-weather community 3 #12;Geophysical Fluid Dynamics Laboratory Software Infrastructure Projects ­ Completed: · Flexible Modeling System (FMS) · FMS Model: Hybrid programming model Memory

218

Aging Dynamics in Mixed Nanoclay Dispersions  

Science Journals Connector (OSTI)

This chapter investigates the ergodicity breaking and aging dynamics in mixture of colloidal clays, Laponite (L) and Montmorillonite (MMT). The relaxation dynamics has been studied systematically through the l...

Ravi Kumar Pujala

2014-01-01T23:59:59.000Z

219

Archetypal energy landscapes: Dynamical diagnosis Florin Despa  

E-Print Network [OSTI]

Archetypal energy landscapes: Dynamical diagnosis Florin Despa Department of Chemistry, University studies have identified several motifs for potential energy surfaces corresponding to distinct dynamic and thermodynamic properties. The corresponding disconnectivity graphs were identified as ``palm tree,'' ``willow

Berry, R. Stephen

220

Optimization of naïve dynamic binary instrumentation Tools/  

E-Print Network [OSTI]

The proliferation of dynamic program analysis tools has done much to ease the burden of developing complex software. However, creating such tools remains a challenge. Dynamic binary instrumentation frameworks such as ...

Kleckner, Reid (Reid N.)

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Lab experiences for teaching undergraduate dynamics  

E-Print Network [OSTI]

This thesis describes several projects developed to teach undergraduate dynamics and controls. The materials were developed primarily for the class 2.003 Modeling Dynamics and Control I. These include (1) a set of ActivLab ...

Lilienkamp, Katherine A. (Katherine Ann), 1969-

2003-01-01T23:59:59.000Z

222

Dynamic Algorithm for Space Weather Forecasting System  

E-Print Network [OSTI]

We propose to develop a dynamic algorithm that intelligently analyzes existing solar weather data and constructs an increasingly more accurate equation/algorithm for predicting solar weather accurately in real time. This dynamic algorithm analyzes a...

Fischer, Luke D.

2011-08-08T23:59:59.000Z

223

A Multiscale Analysis of Dynamic Wetting  

E-Print Network [OSTI]

Williams, B. C. (2008). Engineering Fluid Mechanics. Wiley,Thermo-Fluid Dynamics: In Materials Science and Engineering.Fluid Dynamics. McGraw-Hill Sci- ence/Engineering/Math, 1st

Minaki, Hiroyuki

2013-01-01T23:59:59.000Z

224

Development of a Dynamic DOE Calibration Model  

Broader source: Energy.gov [DOE]

A dynamic heavy duty diesel engine model was developed. The model can be applied for calibration and control system optimization.

225

Insight Gained from Simplified Dynamic Analysis  

Broader source: Energy.gov [DOE]

Insight Gained from Simplified Dynamic Analysis ... or Everything Old is New Again October 21, 2014 Greg Mertz Consultant

226

Risk-Averse Stochastic Dual Dynamic Programming  

E-Print Network [OSTI]

Feb 27, 2013 ... dynamic programming for hydroelectricity generation, Technical report, Electric Power Opti- mization Centre, University of Auckland, ...

2013-02-27T23:59:59.000Z

227

Dynamic Screening and Thermonuclear Reaction Rates  

E-Print Network [OSTI]

We show that there are no dynamic screening corrections to the Salpeter's enhancement factor in the weak-screening limit.

Andrei V. Gruzinov

1997-02-06T23:59:59.000Z

228

Dynamics of Josephson-junction ladders  

SciTech Connect (OSTI)

We have numerically studied dynamical behaviors of Josephson-junction ladders consisting of [ital N][sub [ital p

Kim, J. (Department of Physics, Basic Science Research Institute, Pohang Institute of Science and Technology, Pohang P.O. Box 125, Kyungbuk 790-600 (Korea, Republic of) Division of Basic Science Research, Research Institute of Industrial Science and Technology, Pohang P.O. Box 135, Kyungbuk 790-600 (Korea, Republic of)); Choe, W.G.; Kim, S. (Department of Physics, Basic Science Research Institute, Pohang Institute of Science and Technology, Pohang P.O. Box 125, Kyungbuk 790-600 (Korea, Republic of)); Lee, H.J. (Department of Physics, Basic Science Research Institute, Pohang Institute of Science and Technology, Pohang P.O. Box 125, Kyungbuk 790-600 (Korea, Republic of) Division of Basic Science Research, Research Institute of Industrial Science and Technology, Pohang P.O. Box 135, Kyungbuk 790-600 (Korea, Republic of))

1994-01-01T23:59:59.000Z

229

Dynamic capabilities in the software process  

Science Journals Connector (OSTI)

Software development is an important dynamic capability of a software-developing organisation. This paper explores product development in general and software development in particular from the viewpoint of the dynamic capabilities research stream ... Keywords: RBV, dynamic capabilities, inductive reasoning, product development, product innovation, resource transformation typology, resource-based view, software business, software development, software engineering, software process

Markus M. Makela; Nilay V. Oza; Jyrki Kontio

2008-12-01T23:59:59.000Z

230

Socio-economic dynamics of biofuel  

E-Print Network [OSTI]

i Socio-economic dynamics of biofuel development in Asia Pacific Christina Schott Jakarta, 2009 #12;ii Socio-economic dynamics of biofuel development in Asia Pacific Socio-economic dynamics of biofuel of many biofuels has turned out to be far from sustainable. The carbon balance often proves to be negative

231

Dynamic Testing of Check Valves William Rahmeyer  

E-Print Network [OSTI]

Dynamic Testing of Check Valves William Rahmeyer Professor of Civil and Environmental Engineering;1 DYNAMIC FLOW TESTING OF CHECK VALVES by William Rahmeyer, Professor of Civil and Environmental Engineering objectives of this paper are: (1) to present a test method by which check valves can be dynamically tested

Rahmeyer, William J.

232

Role reversal in the stand dynamics of an angiosperm–conifer forest: Colonising angiosperms precede a shade-tolerant conifer in Afrotemperate forest  

Science Journals Connector (OSTI)

In mixed angiosperm–conifer forests worldwide, infrequent landscape-level catastrophic disturbances create a mosaic of persistent and different aged forest stands in the landscape with varying levels of dominance by the conifer component. In the ‘temporal stand replacement model’ (TSRM), disturbance creates conditions favouring a colonising cohort that is replaced by a suite of relatively shade-tolerant canopy species, which establish following the synchronous senescence of the pioneer canopy. In most southern hemisphere mixed angiosperm–conifer forests, with the exception of those in southern Africa, the establishing cohort is usually a large and very long-lived (550–650 years) conifer that is gradually replaced by angiosperms. As an explanation of the apparent dominance of the conifer Podocarpus latifolius, we examine the efficacy of the TSRM in mixed Afrotemperate forests where the establishing cohort is not a conifer. Forest succession in Afrotemperate forests was deterministic with the successive replacement of species determined first by their establishment success in shaded environments, and second, by their relative longevity. Several angiosperm species that were common canopy dominants established a pioneer cohort but were gradually replaced by P. latifolius, a shade-tolerant species. Continuous regeneration beneath the angiosperm canopy by P. latifolius eliminates synchronous canopy senescence, a key feature of the TSRM, as a mechanism driving the temporal replacement of canopy species. Senescing angiosperms created canopy gaps that were colonised by grasses and ferns, which suppressed canopy tree regeneration. In contrast, with continuous regeneration beneath the shaded canopy, P. latifolius gains a critical advantage over angiosperms at gap formation. Thus, in the absence of fairly large-scale natural disturbances, conifers come to dominate Afrotemperate forests. Commensurate with the latter, conifers in Podocarpus-forest were dated to approximately 320 years, more than 100 years older than the oldest P. latifolius in angiosperm-dominated forest. Tree life-history differences (shade tolerance, longevity) and the time since disturbance drive successional change from an angiosperm-dominated system to a stage dominated by P. latifolius. In general, the TSRM is a plausible explanation for the observed canopy tree structure and dynamics in mixed Afrotemperate forests. South African Afrotemperate forest is unusual among other southern hemisphere mixed angiosperm–conifer forests in that a suite of angiosperm canopy species, rather than a single conifer species, forms the colonising cohort.

Hylton Adie; Michael J. Lawes

2009-01-01T23:59:59.000Z

233

Control algorithms for dynamic attenuators  

SciTech Connect (OSTI)

Purpose: The authors describe algorithms to control dynamic attenuators in CT and compare their performance using simulated scans. Dynamic attenuators are prepatient beam shaping filters that modulate the distribution of x-ray fluence incident on the patient on a view-by-view basis. These attenuators can reduce dose while improving key image quality metrics such as peak or mean variance. In each view, the attenuator presents several degrees of freedom which may be individually adjusted. The total number of degrees of freedom across all views is very large, making many optimization techniques impractical. The authors develop a theory for optimally controlling these attenuators. Special attention is paid to a theoretically perfect attenuator which controls the fluence for each ray individually, but the authors also investigate and compare three other, practical attenuator designs which have been previously proposed: the piecewise-linear attenuator, the translating attenuator, and the double wedge attenuator. Methods: The authors pose and solve the optimization problems of minimizing the mean and peak variance subject to a fixed dose limit. For a perfect attenuator and mean variance minimization, this problem can be solved in simple, closed form. For other attenuator designs, the problem can be decomposed into separate problems for each view to greatly reduce the computational complexity. Peak variance minimization can be approximately solved using iterated, weighted mean variance (WMV) minimization. Also, the authors develop heuristics for the perfect and piecewise-linear attenuators which do not requirea priori knowledge of the patient anatomy. The authors compare these control algorithms on different types of dynamic attenuators using simulated raw data from forward projected DICOM files of a thorax and an abdomen. Results: The translating and double wedge attenuators reduce dose by an average of 30% relative to current techniques (bowtie filter with tube current modulation) without increasing peak variance. The 15-element piecewise-linear dynamic attenuator reduces dose by an average of 42%, and the perfect attenuator reduces dose by an average of 50%. Improvements in peak variance are several times larger than improvements in mean variance. Heuristic control eliminates the need for a prescan. For the piecewise-linear attenuator, the cost of heuristic control is an increase in dose of 9%. The proposed iterated WMV minimization produces results that are within a few percent of the true solution. Conclusions: Dynamic attenuators show potential for significant dose reduction. A wide class of dynamic attenuators can be accurately controlled using the described methods.

Hsieh, Scott S., E-mail: sshsieh@stanford.edu [Department of Radiology, Stanford University, Stanford, California 94305 and Department of Electrical Engineering, Stanford University, Stanford, California 94305 (United States); Pelc, Norbert J. [Department of Radiology, Stanford University, Stanford California 94305 and Department of Bioengineering, Stanford University, Stanford, California 94305 (United States)] [Department of Radiology, Stanford University, Stanford California 94305 and Department of Bioengineering, Stanford University, Stanford, California 94305 (United States)

2014-06-15T23:59:59.000Z

234

THE JOURNAL OF CHEMICAL PHYSICS 139, 175101 (2013) Dynamic neutron scattering from conformational dynamics. I. Theory  

E-Print Network [OSTI]

#12;THE JOURNAL OF CHEMICAL PHYSICS 139, 175101 (2013) Dynamic neutron scattering from, a conformational dynamics theory of dynamical neutron and X-ray scattering is developed, follow- ing our previous spectroscopy (dynamic neutron scattering) probes time correlations on the sub pico- to microsec- ond timescales

235

Dynamic imaging with electron microscopy  

ScienceCinema (OSTI)

Livermore researchers have perfected an electron microscope to study fast-evolving material processes and chemical reactions. By applying engineering, microscopy, and laser expertise to the decades-old technology of electron microscopy, the dynamic transmission electron microscope (DTEM) team has developed a technique that can capture images of phenomena that are both very small and very fast. DTEM uses a precisely timed laser pulse to achieve a short but intense electron beam for imaging. When synchronized with a dynamic event in the microscope's field of view, DTEM allows scientists to record and measure material changes in action. A new movie-mode capability, which earned a 2013 R&D 100 Award from R&D Magazine, uses up to nine laser pulses to sequentially capture fast, irreversible, even one-of-a-kind material changes at the nanometer scale. DTEM projects are advancing basic and applied materials research, including such areas as nanostructure growth, phase transformations, and chemical reactions.

Campbell, Geoffrey; McKeown, Joe; Santala, Melissa

2014-05-30T23:59:59.000Z

236

Dynamic imaging with electron microscopy  

SciTech Connect (OSTI)

Livermore researchers have perfected an electron microscope to study fast-evolving material processes and chemical reactions. By applying engineering, microscopy, and laser expertise to the decades-old technology of electron microscopy, the dynamic transmission electron microscope (DTEM) team has developed a technique that can capture images of phenomena that are both very small and very fast. DTEM uses a precisely timed laser pulse to achieve a short but intense electron beam for imaging. When synchronized with a dynamic event in the microscope's field of view, DTEM allows scientists to record and measure material changes in action. A new movie-mode capability, which earned a 2013 R&D 100 Award from R&D Magazine, uses up to nine laser pulses to sequentially capture fast, irreversible, even one-of-a-kind material changes at the nanometer scale. DTEM projects are advancing basic and applied materials research, including such areas as nanostructure growth, phase transformations, and chemical reactions.

Campbell, Geoffrey; McKeown, Joe; Santala, Melissa

2014-02-20T23:59:59.000Z

237

Predissociation dynamics of lithium iodide  

E-Print Network [OSTI]

The predissociation dynamics of lithium iodide (LiI) in the first excited A-state is investigated for molecules in the gas phase and embedded in helium nanodroplets, using femtosecond pump-probe photoionization spectroscopy. In the gas phase, the transient Li+ and LiI+ ion signals feature damped oscillations due to the excitation and decay of a vibrational wave packet. Based on high-level ab initio calculations of the electronic structure of LiI and simulations of the wave packet dynamics, the exponential signal decay is found to result from predissociation predominantly at the lowest avoided X-A potential curve crossing, for which we infer a coupling constant V=650(20) reciprocal cm. The lack of a pump-probe delay dependence for the case of LiI embedded in helium nanodroplets indicates fast droplet-induced relaxation of the vibrational excitation.

Schmidt, H; Stienkemeier, F; Bogomolov, A S; Baklanov, A V; Reich, D M; Skomorowski, W; Koch, C P; Mudrich, M

2015-01-01T23:59:59.000Z

238

Unwinding relaxation dynamics of polymers  

E-Print Network [OSTI]

The relaxation dynamics of a polymer wound around a fixed obstacle constitutes a fundamental instance of polymer with twist and torque and it is of relevance also for DNA denaturation dynamics. We investigate it by simulations and Langevin equation analysis. The latter predicts a relaxation time scaling as a power of the polymer length times a logarithmic correction related to the equilibrium fluctuations of the winding angle. The numerical data support this result and show that at short times the winding angle decreases as a power-law. This is also in agreement with the Langevin equation provided a winding-dependent friction is used, suggesting that such reduced description of the system captures the basic features of the problem.

Jean-Charles Walter; Marco Baiesi; Gerard Barkema; Enrico Carlon

2013-01-13T23:59:59.000Z

239

A Reformulation of Newtonian Dynamics  

Science Journals Connector (OSTI)

It is postulated that all dynamical laws must be formulated in terms of variables measured relative to interacting particles. This implies that the two-particle system is the fundamental interaction unit. When this postulate is applied to Newtonian mechanics a radically new conceptual structure is revealed. The two major changes which result are the absence of the law of inertia and a broadening of the space and time invariance to include accelerated observers. Although energy and angular momentum remain conserved in this reformulation the usual linear momentum theorem does not appear. It is further shown that the theory can be expressed in the Lagrangian and Hamiltonian formalisms in a straightforward manner. Finally applications are made to several simple two-body and three-body systems which demonstrate that many-particle interactions can be formulated without reference to the dynamics of a single particle.

C. Gregory Hood

1970-01-01T23:59:59.000Z

240

The dynamics of fragment formation  

SciTech Connect (OSTI)

We demonstrate that in the Quantum Molecular Dynamics model, dynamical correlations can result in the production rate for final state nucleon clusters (and hence composite fragments) being higher than would be expected if statistics and the available phase space were dominant in determining composite formation. An intranuclear cascade or a Boltzmann-Uehling-Uhlenbeck model, combined with a statistical approach in the late stage of the collision to determine composites, provides an equivalent description only under limited conditions of centrality and beam energy. We use data on participant fragment production in Au + Au collisions in the Bevalac`s BOS time projection chamber to map out the parameter space where statistical clustering provides a good description. In particular, we investigate momentum-space densities of fragments up to {sup 4}He as a function of fragment transverse momentum, azimuth relative to the reaction plane, rapidity, multiplicity and beam energy.

Keane, D. [Kent State Univ., OH (United States); EOS Collaboration

1994-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Dynamic load balancing of applications  

DOE Patents [OSTI]

An application-level method for dynamically maintaining global load balance on a parallel computer, particularly on massively parallel MIMD computers. Global load balancing is achieved by overlapping neighborhoods of processors, where each neighborhood performs local load balancing. The method supports a large class of finite element and finite difference based applications and provides an automatic element management system to which applications are easily integrated.

Wheat, Stephen R. (Albuquerque, NM)

1997-01-01T23:59:59.000Z

242

Dynamic response of guyed towers  

E-Print Network [OSTI]

guyed towers. A parametric study was conducted using eigen analysis to determine the effects of consistent mass, geometric stiffness and P-Delta gravity loads. Time domain solutions were obtained by direct integration for motion due to regular Stokes... guyed tower 2 References to guyed tower dynamic analysis 4 Effect of mass formulation on tower natural periods. 5 P-Delta effect on fundamental period. 6 Effect of axial compression on the 1st & 2nd mode. 7 Geometric stiffness effect on natural...

Gillcrist, Mark Christopher

2012-06-07T23:59:59.000Z

243

Turbo Dynamics | Open Energy Information  

Open Energy Info (EERE)

Turbo Dynamics Turbo Dynamics Jump to: navigation, search Name Turbo Dynamics Address 3235 River rd. Place Toledo, Ohio Zip 43614 Sector Biomass, Buildings, Efficiency, Renewable Energy, Services, Solar Product Agriculture; Consulting;Energy audits/weatherization; Engineering/architectural/design;Installation; Maintenance and repair;Manufacturing; Research and development;Retail product sales and distribution;Trainining and education Phone number 419-382-7287 Website http://www.turbodradial.com Coordinates 41.607247°, -83.591719° 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":41.607247,"lon":-83.591719,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

244

Brownian dynamics without Green's functions  

SciTech Connect (OSTI)

We develop a Fluctuating Immersed Boundary (FIB) method for performing Brownian dynamics simulations of confined particle suspensions. Unlike traditional methods which employ analytical Green's functions for Stokes flow in the confined geometry, the FIB method uses a fluctuating finite-volume Stokes solver to generate the action of the response functions “on the fly.” Importantly, we demonstrate that both the deterministic terms necessary to capture the hydrodynamic interactions among the suspended particles, as well as the stochastic terms necessary to generate the hydrodynamically correlated Brownian motion, can be generated by solving the steady Stokes equations numerically only once per time step. This is accomplished by including a stochastic contribution to the stress tensor in the fluid equations consistent with fluctuating hydrodynamics. We develop novel temporal integrators that account for the multiplicative nature of the noise in the equations of Brownian dynamics and the strong dependence of the mobility on the configuration for confined systems. Notably, we propose a random finite difference approach to approximating the stochastic drift proportional to the divergence of the configuration-dependent mobility matrix. Through comparisons with analytical and existing computational results, we numerically demonstrate the ability of the FIB method to accurately capture both the static (equilibrium) and dynamic properties of interacting particles in flow.

Delong, Steven; Donev, Aleksandar, E-mail: donev@courant.nyu.edu [Courant Institute of Mathematical Sciences, New York University, New York, New York 10012 (United States)] [Courant Institute of Mathematical Sciences, New York University, New York, New York 10012 (United States); Usabiaga, Florencio Balboa; Delgado-Buscalioni, Rafael [Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Univeridad Autónoma de Madrid, Madrid 28049 (Spain)] [Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Univeridad Autónoma de Madrid, Madrid 28049 (Spain); Griffith, Boyce E. [Courant Institute of Mathematical Sciences, New York University, New York, New York 10012 (United States) [Courant Institute of Mathematical Sciences, New York University, New York, New York 10012 (United States); Leon H. Charney Division of Cardiology, Department of Medicine, New York University School of Medicine, New York, New York 10016 (United States)

2014-04-07T23:59:59.000Z

245

Dynamics of evaporative colloidal patterning  

E-Print Network [OSTI]

Drying suspensions often leave behind complex patterns of particulates, as might be seen in the coffee stains on a table. Here we consider the dynamics of periodic band or uniform solid film formation on a vertical plate suspended partially in a drying colloidal solution. Direct observations allow us to visualize the dynamics of the band and film deposition, and the transition in between when the colloidal concentration is varied. A minimal theory of the liquid meniscus motion along the plate reveals the dynamics of the banding and its transition to the filming as a function of the ratio of deposition and evaporation rates. We also provide a complementary multiphase model of colloids dissolved in the liquid, which couples the inhomogeneous evaporation at the evolving meniscus to the fluid and particulate flows and the transition from a dilute suspension to a porous plug. This allows us to determine the concentration dependence of the bandwidth and the deposition rate. Together, our findings allow for the control of drying-induced patterning as a function of the colloidal concentration and evaporation rate.

C. Nadir Kaplan; Ning Wu; Shreyas Mandre; Joanna Aizenberg; L. Mahadevan

2014-12-04T23:59:59.000Z

246

Brownian Dynamics without Green's Functions  

E-Print Network [OSTI]

We develop a Fluctuating Immersed Boundary (FIB) method for performing Brownian dynamics simulations of confined particle suspensions. Unlike traditional methods which employ analytical Green's functions for Stokes flow in the confined geometry, the FIB method uses a fluctuating finite-volume Stokes solver to generate the action of the response functions "on the fly". Importantly, we demonstrate that both the deterministic terms necessary to capture the hydrodynamic interactions among the suspended particles, as well as the stochastic terms necessary to generate the hydrodynamically-correlated Brownian motion, can be generated by solving the steady Stokes equations numerically only once per time step. This is accomplished by including a stochastic contribution to the stress tensor in the fluid equations consistent with fluctuating hydrodynamics. We develop novel temporal integrators that account for the multiplicative nature of the noise in the equations of Brownian dynamics and the strong dependence of the mobility on the configuration for confined systems. Notably, we propose a random finite difference approach to approximating the stochastic drift proportional to the divergence of the configuration-dependent mobility matrix. Through comparisons with analytical and existing computational results, we numerically demonstrate the ability of the FIB method to accurately capture both the static (equilibrium) and dynamic properties of interacting particles in flow.

S. Delong; F. Balboa Usabiaga; R. Delgado-Buscalioni; B. E. Griffith; A. Donev

2014-01-16T23:59:59.000Z

247

Brief Bio Dr. Peter Rona  

E-Print Network [OSTI]

discoveries including the first seafloor hydrothermal field, vent ecosystem with animals new to science hydrothermal vents, currently applied to monitor hydrothermal flow off northwestern North America understanding of their structure, dynamics and mineralization processes, with current work on the Mid

248

Brownian Dynamics Simulation of Protein Solutions: Structural and Dynamical Properties  

SciTech Connect (OSTI)

The study of solutions of biomacromolecules provides an important basis for understanding the behavior of many fundamental cellular processes, such as protein folding, self-assembly, biochemical reactions, and signal transduction. Here, we describe a Brownian dynamics simulation procedure and its validation for the study of the dynamic and structural properties of protein solutions. In the model used, the proteins are treated as atomically detailed rigid bodies moving in a continuum solvent. The protein-protein interaction forces are described by the sum of electrostatic interaction, electrostatic desolvation, nonpolar desolvation, and soft-core repulsion terms. The linearized Poisson-Boltzmann equation is solved to compute electrostatic terms. Simulations of homogeneous solutions of three different proteins with varying concentrations, pH, and ionic strength were performed. The results were compared to experimental data and theoretical values in terms of long-time self-diffusion coefficients, second virial coefficients, and structure factors. The results agree with the experimental trends and, in many cases, experimental values are reproduced quantitatively. There are no parameters specific to certain protein types in the interaction model, and hence the model should be applicable to the simulation of the behavior of mixtures of macromolecules in cell-like crowded environments.

Mereghetti, Paolo; Gabdoulline, Razif; Wade, Rebecca C.

2010-12-01T23:59:59.000Z

249

Structure and Stratigraphy Beneath a Young Phreatic Vent: South...  

Open Energy Info (EERE)

California. The purpose of the hole was to investigate the magmatic behavior that led to surface deformation and phreatic activity during the 600-year-old eruption of the...

250

Temperatures at the Base of the Seismogenic Crust Beneath Long...  

Open Energy Info (EERE)

temperature at which the first mineral species in the crustal rock enters the quasi-plastic domain. This sub-solidus temperature marks the onset of the transition from brittle...

251

Evidence for magma-carbonate interaction beneath Syrtis Major, Mars  

E-Print Network [OSTI]

lime (CaO), periclase (MgO), portlandite (Ca(OH)2), and brucite (Mg(OH)2), are present on the surface

Glotch, Timothy D.

252

Lower crustal deformation beneath the central Transverse Ranges, southern California  

E-Print Network [OSTI]

in the San Gabriel Mountains. A simple mass balance calculation suggests that $36 km of north- south

Okaya, David

253

Search for Oil and Gas Pools Beneath the North Sea  

Science Journals Connector (OSTI)

... OFFSHORE drilling for ... drilling for oil within continental shelf deposits has for some years past been established procedure in determining seaward ...

H. B. MILNER

1964-02-15T23:59:59.000Z

254

Mapping the Hydrothermal System Beneath the Western Moat of Long...  

Open Energy Info (EERE)

Technology (DGT), under the Magma Energy Program, and by the DOE Office of Energy Research, Division of Engineering and Geosciences (DEG), along with the USGS and NSE, under...

255

Understanding what lies beneath: Groundwater critical to Texas water  

E-Print Network [OSTI]

of organizations and programs associated with groundwater in Texas: Aquifers: Geological formations that can store, transmit, and yield groundwater to a well or spring. Groundwater comes from nine major and 21 minor aquifers in Texas. Confined aquifer: Layer... of water that is held between two layers of clay. The recharge area is limited to land surface where the aquifer?s geologic material is exposed to the land surface. Unconfined aquifer: Layer of water that has a confining layer on bottom and a layer...

Wythe, Kathy

2008-01-01T23:59:59.000Z

256

3-D Seismic Methods for Shallow Imaging Beneath Pavement  

E-Print Network [OSTI]

The research presented in this dissertation focuses on survey design and acquisition of near-surface 3D seismic reflection and surface wave data on pavement. Increased efficiency for mapping simple subsurface interfaces ...

Miller, Brian

2013-05-31T23:59:59.000Z

257

Beneath the surface: The decline in gender injury gap  

Science Journals Connector (OSTI)

Abstract Gender differences in the labor market are typically measured by the wage gap. In this paper, we investigate how extending the analysis to an additional job amenity, namely workplace safety, may shed new light on the evolution of gender differences. Our results show that focusing on one unique measure of the gender gap may provide a biased view of the actual progress of women in the labor market. In our data, a significant reduction in the wage gap has been accompanied by a relative increase in injury risk for some groups of workers, e.g. low-skilled female workers. The decreased gender wage gap for these workers does not necessarily imply an overall improvement in their labor market outcomes.

Tiziano Razzolini; Roberto Leombruni; Giovanni Mastrobuoni; Mario Pagliero

2014-01-01T23:59:59.000Z

258

A New Kind of Storm Beneath the Sea  

Science Journals Connector (OSTI)

...the time of the surge, a string of current meters set on the...not sure what drives such oscillating currents, which apparently...In the case of Luyten's oscillating currents, Williams believes...Williams points out, but the oscillating currents appear to be less...

RICHARD A. KERR

1980-05-02T23:59:59.000Z

259

A Leviathan Takes Shape Beneath Geneva's Gentle Environs  

Science Journals Connector (OSTI)

...universe. The long view. A string of superconducting...electromagnetic fields oscillating at radio frequencies...universe. The long view. A string of superconducting...electromagnetic fields oscillating at radio frequencies...

Matin Durrani

2004-02-06T23:59:59.000Z

260

Scalar Mesons and Chiral Dynamics  

Science Journals Connector (OSTI)

We discuss scalar mesons properties on the light of chiral dynamics. Considering them as the chiral partners of pseudo?scalar mesons we propose an explanation to their unusual properties based on non?trivial vacuum effects coming from the interplay between spontaneous breaking of chiral symmetry and the violation of UA (1) symmetry by instantons. Including vector mesons as external sources we work out predictions for radiative decays of vector mesons and compare some of them with recent experimental results from high luminosity ? factories.

Mauro Napsuciale

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Scalar Mesons and Chiral Dynamics  

E-Print Network [OSTI]

We discuss scalar mesons properties on the light of chiral dynamics. Considering them as the chiral partners of pseudo-scalar mesons we propose an explanation to their unusual properties based on non-trivial vacuum effects coming from the interplay between spontaneous breaking of chiral symmetry and the violation of $U_A(1)$ symmetry by instantons. Including vector mesons as external sources we work out predictions for radiative decays of vector mesons and compare some of them with recent experimental results from high luminosity $\\Phi$ factories.

Mauro Napsuciale

2002-04-15T23:59:59.000Z

262

Loop shaping of structural dynamics  

E-Print Network [OSTI]

Ratios. . 51 5 Constant Current Tests. 6 Varying Current Tests 75 79 LIST OF FIGURES Figure Page 1 Idealized Multiple-Degree-of Freedom Structure. 2 Induced Matrix Norm. 13 3 System G(s) . 15 4 Singular Values of Displacement Response... in terms of the expected values of stochastic signals. All of these various interpretations make the H?norm useful in engineering applications. 15 w(t) G(s) z(t) Fig. 3. System G(s) 2. 3 Singular Values of Structural Dynamics 2. 3. 1 Displacement...

Kim, Byeong Hwa

1999-01-01T23:59:59.000Z

263

Dynamic Structure Factor of Microemulsions  

Science Journals Connector (OSTI)

The dynamic structure factor G(k,?) is studied in a time-dependent Ginzburg-Landau model for microemulsions in thermal equilibrium by field-theoretic perturbation methods. For small viscosities, the structure factor develops a peak at a nonzero frequency ?, for fixed wavelengths of the order of the typical domain size of oil and water regions. This implies that the intermediate scattering function oscillates in time. We give a simple explanation for these temporal oscillations by considering the flow through a tube with a radius-dependent tension.

G. Gompper and M. Hennes

1994-08-22T23:59:59.000Z

264

Dynamical analysis of highly excited molecular spectra  

SciTech Connect (OSTI)

The goal of this program is new methods for analysis of spectra and dynamics of highly excited vibrational states of molecules. In these systems, strong mode coupling and anharmonicity give rise to complicated classical dynamics, and make the simple normal modes analysis unsatisfactory. New methods of spectral analysis, pattern recognition, and assignment are sought using techniques of nonlinear dynamics including bifurcation theory, phase space classification, and quantization of phase space structures. The emphasis is chaotic systems and systems with many degrees of freedom.

Kellman, M.E. [Univ. of Oregon, Eugene (United States)

1993-12-01T23:59:59.000Z

265

Dynamic Testing of Gasifier Refractory  

SciTech Connect (OSTI)

The University of North Dakota (UND) Chemical Engineering Department in conjunction with the UND Energy & Environmental Research Center (EERC) have initiated a program to thoroughly examine the combined chemical (reaction and phase change) and physical (erosion) effects experienced by a variety of refractory materials during both normal operation and thermal cycling under slagging coal gasification conditions. The goal of this work is to devise a mechanism of refractory loss under these conditions. The controlled-atmospheric dynamic corrodent application furnace (CADCAF) is being utilized to simulate refractory/slag interactions under dynamic conditions that more realistically simulate the environment in a slagging coal gasifier than any of the static tests used previously by refractory manufacturers and researchers. Shakedown testing of the CADCAF has been completed. Samples of slag and refractory from the Tampa Electric Polk Power Station have been obtained for testing in the CADCAF. The slag has been dried and sieved to the size needed for our flowing slag corrosion tests. Screening tests are in currently in progress. Detailed analysis of corrosion rates from the first tests is in progress.

Michael D. Mann; Devdutt Shukla; Xi Hong; John P. Hurley

2004-09-27T23:59:59.000Z

266

Ultrafast studies of solution dynamics  

SciTech Connect (OSTI)

This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). Fast chemical dynamics generally must be initiated photochemically. This limits the applicability of modern laser methods for following the structural changes that occur during chemical and biological reactions to those systems that have an electronic chromophore that has a significant yield of photoproduct when excited. This project has developed a new and entirely general approach to ultrafast initiation of reactions in solution: laser-induced temperature jump (T-jump). The results open entire new fields of study of ultrafast molecular dynamics in solution. The authors have demonstrated the T-jump technique on time scales of 50 ps and longer, and have applied it to study of the fast events in protein folding. They find that a general lifetime of alpha-helix formation is ca 100 ns, and that tertiary folds (in apomyoglobin) form in ca 100 {mu}s.

Woodruff, W.H.; Dyer, R.B. [Los Alamos National Lab., NM (United States); Callender, R.H. [City Univ. of New York, NY (United States). Dept. of Physics

1997-10-01T23:59:59.000Z

267

Radiation in molecular dynamic simulations  

SciTech Connect (OSTI)

Hot dense radiative (HDR) plasmas common to Inertial Confinement Fusion (ICF) and stellar interiors have high temperature (a few hundred eV to tens of keV), high density (tens to hundreds of g/cc) and high pressure (hundreds of Megabars to thousands of Gigabars). Typically, such plasmas undergo collisional, radiative, atomic and possibly thermonuclear processes. In order to describe HDR plasmas, computational physicists in ICF and astrophysics use atomic-scale microphysical models implemented in various simulation codes. Experimental validation of the models used to describe HDR plasmas are difficult to perform. Direct Numerical Simulation (DNS) of the many-body interactions of plasmas is a promising approach to model validation but, previous work either relies on the collisionless approximation or ignores radiation. We present a new numerical simulation technique to address a currently unsolved problem: the extension of molecular dynamics to collisional plasmas including emission and absorption of radiation. The new technique passes a key test: it relaxes to a blackbody spectrum for a plasma in local thermodynamic equilibrium. This new tool also provides a method for assessing the accuracy of energy and momentum exchange models in hot dense plasmas. As an example, we simulate the evolution of non-equilibrium electron, ion, and radiation temperatures for a hydrogen plasma using the new molecular dynamics simulation capability.

Glosli, J; Graziani, F; More, R; Murillo, M; Streitz, F; Surh, M

2008-10-13T23:59:59.000Z

268

Dynamics of magnetic nanoparticle suspensions  

E-Print Network [OSTI]

We study the dynamics of a suspension of magnetic nanoparticles. Their relaxation times are strongly size-dependent. The dominant mode of relaxation is also governed by the size of the particles. As a result the dynamics is greatly altered due to polydispersity in the sample. We study the effect of polydispersity on the response functions. These exhibit significant changes as the parameters characterizing polydispersity are varied. We also provide a procedure to extract the particle size distribution in a polydisperse sample using Cole-Cole plots. Further the presence of attractive interactions causes aggregation of particles leading to the formation of clusters. Repulsive interactions along with thermal disorder not only hinder aggregation, but also introduce the possibility of removal of particles or "fragmentation" from clusters. The competing mechanisms of aggregation and fragmentation yield a distribution of cluster sizes in the steady-state. We attempt to understand the formation of clusters and their distributions using a model incorporating the phenomena of aggregation and fragmentation. Scaling forms for quantities of interest have been obtained. Finally we compare our numerical results with experimental data. These comparisons are satisfactory.

Vanchna Singh; Varsha Banerjee; Manish Sharma

2012-08-20T23:59:59.000Z

269

Pre-equilibrium plasma dynamics  

SciTech Connect (OSTI)

Approaches towards understanding and describing the pre-equilibrium stage of quark-gluon plasma formation in heavy-ion collisions are reviewed. Focus is on a kinetic theory approach to non-equilibrium dynamics, its extension to include the dynamics of color degrees of freedom when applied to the quark-gluon plasma, its quantum field theoretical foundations, and its relationship to both the particle formation stage at the very beginning of the nuclear collision and the hydrodynamic stage at late collision times. The usefulness of this approach to obtain the transport coefficients in the quark-gluon plasma and to derive the collective mode spectrum and damping rates in this phase are discussed. Comments are made on the general difficulty to find appropriated initial conditions to get the kinetic theory started, and a specific model is given that demonstrates that, once given such initial conditions, the system can be followed all the way through into the hydrodynamical regime. 39 refs., 7 figs. (LEW)

Heinz, U.

1986-01-01T23:59:59.000Z

270

Dynamic Drift Compensation for Heliostats  

Science Journals Connector (OSTI)

Abstract In central receiver solar power plants the accuracy of heliostat aiming affects directly the plant efficiency. This accuracy depends on multiple factors, some of which are alignment and operation parameters like: canting, pedestal leveling, elevation and zenith orientations, structural deformation, and clock-date timer accuracy to calculate solar position. All of those factors produce drift of the heliostat concentrated radiation spot. The error parameters differ from heliostat to heliostat in a field, and affect each one in a different manner, depending on their location in the field. Trying to compensate by software for every single error parameter, and for each heliostat is a hard, time consuming, and impractical task. Instead of that, a dynamic drift compensator may be used to fix the problem. This corrector works well for certain period of time, requiring a recalibration whenever the heliostat image shifts beyond the tolerance region. This method requires less effort, resulting in a practical solution to drift correction. This work reports on the implementation of a dynamic drift compensator based on a static third order polynomial function, at the Heliostat Test Field in Hermosillo, Sonora, Mexico. The results are compared to theoretical predictions based on error parameters for one heliostat.

C. Iriarte-Cornejo; C.A. Arancibia-Bulnes; J. Waissman; R.E. Cabanillas; C.A. Estrada

2014-01-01T23:59:59.000Z

271

Dynamically installed anchors for floating offshore structures.  

E-Print Network [OSTI]

??The gradual depletion of shallow water hydrocarbon deposits has forced the offshore oil and gas industry to develop reserves in deeper waters. Dynamically installed anchors… (more)

Richardson, Mark Damian

2008-01-01T23:59:59.000Z

272

Sandia National Laboratories: Computational Fluid Dynamics Simulations...  

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

Canal, Yakima Washington Sandia Publishes Five Reports on the Environmental Effects of Wave-Energy Converters Computational Fluid Dynamics Simulations Provide Insight for Rotor...

273

Dynamics in Polymer | ornl.gov  

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

Neutron scattering characterizes dynamics in polymer family Agatha Bardoel - December 01, 2012 Interior of BASIS. Research Contact: Christine Gerstl Understanding the interplay...

274

Controlling Complex Systems and Developing Dynamic Technology  

E-Print Network [OSTI]

the power output of steam engines to feed the factories ofas a whole, the governed steam engine becomes a less dynamic

Avizienis, Audrius Victor

2013-01-01T23:59:59.000Z

275

MOLECULAR DYNAMICS SIMULATIONS OF NANOPARTICLE INTERACTIONS.  

E-Print Network [OSTI]

??Molecular dynamics simulations using the Embedded Atom Method were performed to describe the interparticle behavior of two single crystal spherical nickel nanoparticles during compaction based… (more)

Stone, Tonya Williams

2006-01-01T23:59:59.000Z

276

On the Dynamic Stability of Electricity Markets  

E-Print Network [OSTI]

issues affecting market stability. In particular, we establish a control-theoretical frame- work that uses concepts arising in electricity markets, dynamic games, and

2011-02-09T23:59:59.000Z

277

Dynamic Simulators | netl.doe.gov  

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

to Develop Dynamic Simulators for Supercritical Pulverized Coal and Natural Gas Combined Cycle Power Plants A screen shot of the new generic supercritical once-through...

278

Accelerated Molecular Dynamics Simulation of Thermal Desorption.  

E-Print Network [OSTI]

??Desorption is a process ubiquitous in phenomena involving surfaces. However, it has rarely been simulated on the molecular level. Molecular dynamics simulation can provide the… (more)

Becker, Kelly

2008-01-01T23:59:59.000Z

279

Molecular dynamics simulation studies of electrolytes andelectrolyte...  

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

Merit Review and Peer Evaluation Meeting, May 18-22, 2009 -- Washington D.C. es40smith.pdf More Documents & Publications Molecular Dynamics Simulation Studies of...

280

Optimization Online - Dynamic Generation of Scenario Trees  

E-Print Network [OSTI]

Sep 3, 2014 ... Abstract: We present new algorithms for the dynamic generation of scenario trees for multistage stochastic optimization. The different methods ...

G. Ch. Pflug

2014-09-03T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Dynamic Positioning System as Dynamic Energy Storage on Diesel-Electric Ships  

E-Print Network [OSTI]

1 Dynamic Positioning System as Dynamic Energy Storage on Diesel-Electric Ships Tor A. Johansen in order to implement energy storage in the kinetic and potential energy of the ship motion using the DP in order to relate the dynamic energy storage capacity to the maximum allowed ship position deviation

Johansen, Tor Arne

282

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

E-Print Network [OSTI]

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

283

Bifurcation theory, adaptive dynamics and dynamic energy budget-structured populations of iteroparous species  

Science Journals Connector (OSTI)

...42, 2nd edn. New York, NY: Springer-Verlag...M. 2000 Dynamic energy and mass budgets...112, 3rd edn. New York, NY: Springer-Verlag...Mathematics, vol. 2. New York, NY: Springer-Verlag...dynamics and dynamic energy budget-structured...

2010-01-01T23:59:59.000Z

284

NETL: Methane Hydrates - DOE/NETL Projects  

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

Gas Hydrate Research in Deep Sea Sediments - New Zealand Task Gas Hydrate Research in Deep Sea Sediments - New Zealand Task DE-AI26-06NT42878 Goal The objective of this research is to determine the extent and dynamics of gas hydrate deposits and their relation to areas of focused fluid flux at and beneath the seafloor. Specific objectives include: a). Refine geophysical, geochemical and microbiological technologies for prospecting hydrate distribution and content; b). Contribute to establishing high-priority geographical regions of prospective interest, in terms of methane volume estimates; c). Prediction of environmental effects and geologic risks at the continental margin associated to the natural resource occurrence and resource exploitation; and d). Expand understanding of the biogeochemical parameters and associated microbial community diversity in shallow sediments that influence the porewater sulfate gradient observed through anaerobic oxidation of methane. To accomplish these objectives, the Naval Research Laboratory (NRL) collaborated with New ZealandÂ’s Institute of Geological and Nuclear Sciences (GNS) in a research cruise off the coast of New Zealand. NRL has conducted similar research cruises off the west coast and east coast of the United States, in the Gulf of Mexico and off the coast of Chile.

285

ORNL DAAC for Biogeochemical Dynamics  

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

Home Home Welcome about us image About Us Provides detailed information about the ORNL DAAC. projects image About Data Lists the data products available from the ORNL DAAC. access image Get Data Guides you through the steps needed to acquire the data. tools image Data Tools Some tools to help you work with the data. uso image Help Need assistance? Our staff is happy to help. ORNL DAAC The Oak Ridge National Laboratory Distributed Active Archive Center (ORNL DAAC) for biogeochemical dynamics is one of the National Aeronautics and Space Administration (NASA) Earth Observing System Data and Information System (EOSDIS) data centers managed by the Earth Science Data and Information System (ESDIS) Project. The ORNL DAAC archives data produced by NASA's Terrestrial Ecology Program. The DAAC provides data and information

286

Dynamics of assembly production flow  

E-Print Network [OSTI]

Despite recent developments in management theory, maintaining a manufacturing schedule remains difficult because of production delays and fluctuations in demand and supply of materials. The response of manufacturing systems to such disruptions to dynamic behavior has been rarely studied. To capture these responses, we investigate a process that models the assembly of parts into end products. The complete assembly process is represented by a directed tree, where the smallest parts are injected at leaves and the end products are removed at the root. A discrete assembly process, represented by a node on the network, integrates parts, which are then sent to the next downstream node as a single part. The model exhibits some intriguing phenomena, including overstock cascade, phase transition in terms of demand and supply fluctuations, nonmonotonic distribution of stockout in the network, and the formation of a stockout path and stockout chains. Surprisingly, these rich phenomena result from only the nature of distr...

Ezaki, Takahiro; Nishinari, Katsuhiro

2015-01-01T23:59:59.000Z

287

Rubber friction and tire dynamics  

E-Print Network [OSTI]

We propose a simple rubber friction law, which can be used, e.g., in models of tire (and vehicle) dynamics. The friction law is tested by comparing numerical results to the full rubber friction theory (B.N.J. Persson, J. Phys.: Condensed Matter 18, 7789 (2006)). Good agreement is found between the two theories. We describe a two-dimensional (2D) tire model which combines the rubber friction model with a simple mass-spring description of the tire body. The tire model is very flexible and can be used to calculate accurate mu-slip (and the self-aligning torque) curves for braking and cornering or combined motion (e.g., braking during cornering). We present numerical results which illustrate the theory. Simulations of Anti-Blocking System (ABS) braking are performed using two simple control algorithms.

B. N. J. Persson

2010-07-16T23:59:59.000Z

288

Dynamics of strings between walls  

SciTech Connect (OSTI)

Configurations of vortex-strings stretched between or ending on domain walls were previously found to be 1/4 BPS states. Among zero modes of string positions, the center of mass of strings in each region between two adjacent domain walls is shown to be non-normalizable whereas the rests are normalizable. We study dynamics of vortex-strings stretched between separated domain walls by using two methods, the moduli space (geodesic) approximation of full 1/4 BPS states and the charged particle approximation for string endpoints in the wall effective action. In the first method we obtain the effective Lagrangian explicitly and find the 90 degree scattering for head-on collision. In the second method the domain wall effective action is assumed to be U(1){sup N} gauge theory, and we find a good agreement between two methods for well separated strings. This talk is based on the work [1].

Eto, Minoru [INFN, Sezione di Pisa, Largo Pontecorvo, 3, Ed. C, 56127 Pisa (Italy); Fujimori, Toshiaki; Nagashima, Takayuki [Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551 (Japan); Nitta, Muneto [Department of Physics, Keio University, Hiyoshi, Yokohama, Kanagawa 223-8521 (Japan); Ohashi, Keisuke [Department of Applied Mathematics and Theoretical Physics, University of Cambridge, CB3 0WA (United Kingdom); Sakai, Norisuke [Department of Mathematics, Tokyo Woman's Christian University, Tokyo 167-8585 (Japan)

2008-11-23T23:59:59.000Z

289

Dynamical generation of pseudoscalar resonances  

SciTech Connect (OSTI)

We study the interactions between the f{sub 0}(980) and a{sub 0}(980) scalar resonances and the lightest pseudoscalar mesons. We first obtain the elementary interaction amplitudes, or interacting kernels, without including any ad hoc free parameter. This is achieved by using previous results on the nature of the lightest scalar resonances as dynamically generated from the rescattering of S-wave two-meson pairs. Afterwards, the interaction kernels are unitarized and the final S-wave amplitudes result. We find that these interactions are very rich and generate a large amount of pseudoscalar resonances that could be associated with the K(1460), {pi}(1300), {pi}(1800), {eta}(1475), and X(1835). We also consider the exotic channels with isospin 3/2 and 1, the latter having positive G-parity. The former could also be resonant in agreement with a previous prediction.

Albaladejo, M.; Oller, J. A.; Roca, L. [Departamento de Fisica, Universidad de Murcia, E-30071 Murcia (Spain)

2010-11-01T23:59:59.000Z

290

Dynamic RKKY interaction in graphene  

Science Journals Connector (OSTI)

The growing interest in carbon-based spintronics has stimulated a number of recent theoretical studies on the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in graphene, based on which the energetically favorable alignment between magnetic moments embedded in this material can be calculated. The general consensus is that the strength of the RKKY interaction in undoped graphene decays as 1/D3 or faster, where D is the separation between magnetic moments. Such an unusually fast decay for a two-dimensional system suggests that the RKKY interaction may be too short ranged to be experimentally observed in graphene. Here we show in a mathematically transparent form that a far more long ranged interaction arises when the magnetic moments are taken out of their equilibrium positions and set in motion. We not only show that this dynamic version of the RKKY interaction in graphene decays far more slowly but also propose how it can be observed with currently available experimental methods.

S. R. Power; F. S. M. Guimarães; A. T. Costa; R. B. Muniz; M. S. Ferreira

2012-05-07T23:59:59.000Z

291

Dynamical Friction on extended perturbers  

E-Print Network [OSTI]

Following a wave-mechanical treatment we calculate the drag force exerted by an infinite homogeneous background of stars on a perturber as this makes its way through the system. We recover Chandrasekhar's classical dynamical friction (DF) law with a modified Coulomb logarithm. We take into account a range of models that encompasses all plausible density distributions for satellite galaxies by considering the DF exerted on a Plummer sphere and a perturber having a Hernquist profile. It is shown that the shape of the perturber affects only the exact form of the Coulomb logarithm. The latter converges on small scales, because encounters of the test and field stars with impact parameters less than the size of the massive perturber become inefficient. We confirm this way earlier results based on the impulse approximation of small angle scatterings.

O. Esquivel; B. Fuchs

2008-04-01T23:59:59.000Z

292

Nonlinear dynamics and plasma transport  

SciTech Connect (OSTI)

This progress report details work done on a program in nonlinear dynamical aspects of plasma turbulence and transport funded by DOE since 1989. This program has been in cooperation with laboratories in theUSSR [now Russia and the Confederation of Independent States (CIS)]. The purpose of this program has been: To promote the utilization of recent pathbreaking developments in nonlinear science in plasma turbulence and transport. To promote cooperative scientific investigations between the US and CIS in the related areas of nonlinear science and plasma turbulence and transport. In the work reported in our progress report, we have studied simple models which are motivated by observation on actual fusion devices. The models focus on the important physical processes without incorporating the complexity of the geometry of real devices. This allows for a deeper analysis and understanding of the system both analytically and numerically.

Antonsen, T.M. Jr.; Drake, J.F.; Finn, J.M.; Guzdar, P.N.; Hassam, A.B.; Sageev, R.Z.

1993-01-01T23:59:59.000Z

293

Molecular potentials and relaxation dynamics  

SciTech Connect (OSTI)

The use of empirical pseudopotentials, in evaluating interatomic potentials, provides an inexpensive and convenient method for obtaining highly accurate potential curves and permits the modeling of core-valence correlation, and the inclusion of relativistic effects when these are significant. Recent calculations of the X/sup 1/..sigma../sup +/ and a/sup 3/..sigma../sup +/ states of LiH, NaH, KH, RbH, and CsH and the X/sup 2/..sigma../sup +/ states of their anions are discussed. Pseudopotentials, including core polarization terms, have been used to replace the core electrons, and this has been coupled with the development of compact, higly-optimized basis sets for the corresponding one- and two-electron atoms. Comparisons of the neutral potential curves with experiment and other ab initio calculations show good agreement (within 1000 cm/sup -1/ over most of the potential curves) with the difference curves being considerably more accurate. In the method of computer molecular dynamics, the force acting on each particle is the resultant of all interactions with other atoms in the neighborhood and is obtained as the derivative of an effective many-body potential. Exploiting the pseudopotential approach, in obtaining the appropriate potentials may be very fruitful in the future. In the molecular dynamics example considered here, the conventional sum-of-pairwise-interatomic-potentials (SPP) approximation is used with the potentials derived either from experimental spectroscopic data or from Hartree-Fock calculations. The problem is the collisional de-excitation of vibrationally excited molecular hydrogen at an Fe surface. The calculations have been carried out for an initial vibrotational state v = 8, J = 1 and a translational temperature corresponding to a gas temperature of 500/sup 0/K. Different angles of approach and different initial random impact points on the surface have been selected. For any given collision with the wall, the molecule may pick up or lose vibrotatonal and translational energy.

Karo, A.M.

1981-05-18T23:59:59.000Z

294

Critical dynamics of the open Ising chain  

Science Journals Connector (OSTI)

The one-dimensional ferromagnetic Ising model with open boundary conditions within the Glauber dynamics is studied. From the behavior of the order parameter, the explicit scaling form of the relaxation time is obtained. For finite systems, the dynamical critical exponent is z=1, in contrast to the value of the infinite open chain (z=2).

J. Kamphorst Leal da Silva; Adriana G. Moreira; M. Silvério Soares; F. C. Sá Barreto

1995-10-01T23:59:59.000Z

295

Dynamics of Nucleation in the Ising Model  

Science Journals Connector (OSTI)

Dynamics of Nucleation in the Ising Model† ... Reactive pathways to nucleation in a three-dimensional Ising model at 60% of the critical temperature are studied using transition path sampling of single spin flip Monte Carlo dynamics. ... The application focuses on the simplest example of nucleation, that of a supercooled Ising model. ...

Albert C. Pan; David Chandler

2004-09-28T23:59:59.000Z

296

Idealized Test Cases for Dynamical Core Experiments  

E-Print Network [OSTI]

Idealized Test Cases for Dynamical Core Experiments Christiane Jablonowski (University of Michigan-13/2006 #12;Motivation · Test cases for 3D dynamical cores on the sphere ­ are hard to find in the literature groups ­ lack standardized & easy-to-use analysis techniques · Idea: Establish a collection of test cases

Jablonowski, Christiane

297

Subsonic Dynamics of Stardust Sample Return Capsule  

Science Journals Connector (OSTI)

Subsonic dynamic stability tests performed in the NASA Langley 20-Foot Vertical Spin-Tunnel on a 0.238 scale model of the Stardust Sample Return Capsule are discussed. The tests reveal that the blunted 60 degree half-angle cone capsule is dynamically ...

Mitcheltree Robert A.; Fremaux Charles M.

1997-03-01T23:59:59.000Z

298

An Infrastructure for Adaptive Dynamic Optimization  

E-Print Network [OSTI]

Amarasinghe Laboratory for Computer Science Massachusetts Institute of Technology Cambridge, MA 02139 {iye and can be used for instru- mentation, profiling, dynamic translation, etc. To demonstrate the usefulness, which heavily utilizes dynamic class loading, shared libraries, and runtime binding. Not only

Amarasinghe, Saman

299

DEMAND SIMULATION FOR DYNAMIC TRAFFIC ASSIGNMENT  

E-Print Network [OSTI]

of the response of travelers to real-time pre- trip information. The demand simulator is an extension of dynamicDEMAND SIMULATION FOR DYNAMIC TRAFFIC ASSIGNMENT Constantinos Antoniou, Moshe Ben-Akiva, Michel Bierlaire, and Rabi Mishalani Massachusetts Institute of Technology, Cambridge, MA 02139 Abstract

Bierlaire, Michel

300

Dynamic detection of nuclear reactor core incident  

Science Journals Connector (OSTI)

Surveillance, safety and security of evolving systems are a challenge to prevent accident. The dynamic detection of a hypothetical and theoretical blockage incident in the Phenix nuclear reactor is investigated. Such an incident is characterized by abnormal ... Keywords: Contrast, Dynamic detection of perturbations, Evolving system, Fast-neutron reactor, Neighbourhood, Noise

Laurent Hartert; Danielle Nuzillard; Jean-Philippe Jeannot

2013-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Photometric Calibration of High Dynamic Range Cameras  

E-Print Network [OSTI]

calibration of cameras with a dynamic range of more than six orders of magnitude such as complex camera re with a total dynamic range of 8 orders of luminance magnitude. Three acquisitions: without filter, using to the measurements of 6 gray patches of GretagMacbeth ColorChecker chart under 6 different illumination conditions. 0

Durand, Frédo

302

Dynamic power systems for power generation  

SciTech Connect (OSTI)

The characteristics of dynamic power systems have considerable potential value, especially for the space station. The base of technology that makes these dynamic power systems practical is reviewed. The following types of power-generating systems are examined herein: organic Rankine cycle, potassium Rankine cycle, Brayton cycle, and Stirling cycle.

English, R.E.

1984-04-01T23:59:59.000Z

303

Calcium Dynamics in Large Neuronal Models  

E-Print Network [OSTI]

Chapter 6 Calcium Dynamics in Large Neuronal Models ERIK DE SCHUTTER and PAUL SMOLEN 6.1 Introduction Calcium is an important intracellular signaling molecule with rapid e ect on the kinetics of many active membrane model that includes Ca2+ dynamics, one is faced with a feedback loop: the Ca2+-activated

De Schutter, Erik

304

Brain dynamics promotes function Carlos Lourenco  

E-Print Network [OSTI]

Brain dynamics promotes function Carlos Louren¸co 1 Faculty of Sciences of the University of Lisbon, 1049-001 Lisboa - Portugal Abstract. Dynamical structure in the brain promotes biological func- tion. Computational scientists have new opportunities to receive 'algorithmic' inspiration from brain processes

Lisboa, Universidade Técnica de

305

DISSIPATIVE PARTICLE DYNAMICS Pep Espa~nol  

E-Print Network [OSTI]

8.6 DISSIPATIVE PARTICLE DYNAMICS Pep Espa~nol Dept. Física Fundamental, Universidad Nacional de be understood as a coarse-graining of molecular dynamics. There are three types of forces between dissipative particles. The first type is a conservative force deriving from a soft potential that tries to capture

Southern California, University of

306

Kalchas: a dynamic XML search engine  

Science Journals Connector (OSTI)

This paper outlines the system architecture and the core data structures of Kalchas, a fulltext search engine for XML data with emphasis on dynamic indexing, and identifies features worth demonstrating. The concept of dynamic index implies that the aim ... Keywords: fulltext search, index cascades, partitioned indexes

Rasmus Kaae; Thanh-Duy Nguyen; Dennis Nørgaard; Albrecht Schmidt

2005-10-01T23:59:59.000Z

307

Dynamic nuclear polarization of liquid 3He  

Science Journals Connector (OSTI)

...March 1998 research-article Dynamic nuclear polarization of liquid 3He B. Bleaney...3PU, UK Methods of producing dynamic nuclear polarization of liquid 3He by the solid...method have been proposed using enhanced nuclear paramagnetic resonance in Van Vleck compounds...

1998-01-01T23:59:59.000Z

308

Dynamic Whitelist Generation for Automated Response  

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

Methodology Methodology Results Dynamic Whitelist Generation for Automated Response Chris Strasburg, Josh Adams Ames Laboratory, US DOE cstras@ameslab.gov, jadams@ameslab.gov The Ames Laboratory, US DOE 1 Dynamic Whitelist Generation for Automated Response Introduction Methodology Results Outline 1 Introduction About Ames Laboratory Motivation 2 Methodology Data Classifiers Experiments 3 Results The Ames Laboratory, US DOE 2 Dynamic Whitelist Generation for Automated Response Introduction Methodology Results About Ames Laboratory Motivation Ames Physical Environment The Ames Laboratory, US DOE 3 Dynamic Whitelist Generation for Automated Response Introduction Methodology Results About Ames Laboratory Motivation Ames Network Environment The Ames Laboratory, US DOE 4 Dynamic Whitelist Generation for Automated Response Introduction Methodology Results About Ames

309

Distributed and Networked Dynamic Resource Allocation, Scheduling, and Control Experiments  

E-Print Network [OSTI]

Distributed and Networked Dynamic Resource Allocation, Scheduling, and Control Experiments Nicanor into decentralized and networked dynamic resource allocation, scheduling, and control. 2 Questions 1. What, "Experiments for decentralized and networked dynamic resource allocation, scheduling, and control," Submitted

310

Laboratory testing of structures under dynamic loads: an introductory review  

Science Journals Connector (OSTI)

...research-article Theme Issue Dynamic testing of structures compiled by M. S. Williams Laboratory testing of structures under dynamic loads: an...introduces and reviews the theme of laboratory testing of structures under dynamic loads. The...

2001-01-01T23:59:59.000Z

311

VALIDATION OF MASSIVELY PARALLEL SIMULATIONS OF DYNAMIC FRACTURE AND  

E-Print Network [OSTI]

VALIDATION OF MASSIVELY PARALLEL SIMULATIONS OF DYNAMIC FRACTURE AND FRAGMENTATION OF BRITTLE element simulations of dynamic fracture and fragmentation of brittle solids are presented. Fracture the results of massively parallel numerical simulations of dynamic fracture and fragmentation in brittle

Barr, Al

312

Dynamics of Kr in dense clathrate hydrates  

Science Journals Connector (OSTI)

The dynamics of Kr atoms as guests in dense clathrate hydrate structures are investigated using site specific Kr83 nuclear resonant inelastic x-ray scattering (NRIXS) spectroscopy in combination with molecular dynamics simulations. The dense structure H hydrate and filled-ice structures are studied at high pressures in a diamond anvil high-pressure cell. The dynamics of Kr in the structure H clathrate hydrate quench recovered at 77 K is also investigated. The Kr phonon density of states obtained from the experimental NRIXS data are compared with molecular dynamics simulations. The temperature and pressure dependence of the phonon spectra provide details of the Kr dynamics in the clathrate hydrate cages. Comparison with the dynamics of Kr atoms in the low-pressure structure II obtained previously was made. The Lamb-Mossbauer factor obtained from NRIXS experiments and molecular dynamics calculations are in excellent agreement and are shown to yield unique information on the strength and temperature dependence of guest-host interactions.

D. D. Klug; J. S. Tse; J. Y. Zhao; W. Sturhahn; E. E. Alp; C. A. Tulk

2011-05-25T23:59:59.000Z

313

A Birkhoff theorem for Shape Dynamics  

E-Print Network [OSTI]

Shape Dynamics is a theory of gravity that replaces refoliation invariance for spatial Weyl invariance. Those solutions of the Einstein equations that have global, constant mean curvature slicings, are mirrored by solutions in Shape Dynamics. However, there are solutions of Shape Dynamics that have no counterpart in General relativity, just as there are solutions of GR that are not completely foliable by global constant mean curvature slicings (such as the Schwarzschild spacetime). It is therefore interesting to analyze directly the equations of motion of Shape Dynamics in order to find its own solutions, irrespective of properties of known solutions of GR. Here I perform a first study in this direction by utilizing the equations of motion of Shape Dynamics in a spherically symmetric, asymptotically flat ansatz to derive an analogue of the Birkhoff theorem. There are two significant differences with respect to the usual Birkhoff theorem in GR. The first regards the construction of the solution: the spatial Weyl gauge freedom of shape dynamics is used to simplify the problem, and boundary conditions are required. In fact the derivation is simpler than the usual Birkhof theorem as no Christoffel symbols are needed. The second, and most important difference is that the solution obtained is uniquely the isotropic wormhole solution, in which no singularity is present, as opposed to maximally extended Schwarzschild. This provides an explicit example of the breaking of the duality between General relativity and Shape Dynamics, and exhibits some of its consequences.

Henrique Gomes

2013-05-01T23:59:59.000Z

314

Fully coupled time-domain simulation of dynamic positioning semi-submersible platform using dynamic surface control  

Science Journals Connector (OSTI)

A fully coupled 6-degree-of-freedom nonlinear dynamic model is presented to analyze the dynamic response of a semi-submersible platform which is equipped with the dynamic positioning...

Haizhi Liang; Luyu Li; Jinping Ou

2014-06-01T23:59:59.000Z

315

Low-Cost Solutions for Dynamic Window Material | Department of...  

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

Low-Cost Solutions for Dynamic Window Material Low-Cost Solutions for Dynamic Window Material Emerging Technologies Project for the 2013 Building Technologies Office's Program Peer...

316

Single-Molecule Dynamics Reveals Cooperative Binding-Folding...  

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

Molecule Dynamics Reveals Cooperative Binding-Folding in Protein Recognition . Single-Molecule Dynamics Reveals Cooperative Binding-Folding in Protein Recognition . Abstract: The...

317

Efficient and Dynamic ? The BMW Group Roadmap for the Application...  

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

and Dynamic The BMW Group Roadmap for the Application of Thermoelectric Generators Efficient and Dynamic The BMW Group Roadmap for the Application of Thermoelectric...

318

Minor Groove Deformability of DNA: A Molecular Dynamics Free...  

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

Minor Groove Deformability of DNA: A Molecular Dynamics Free EnergySimulation Study. Minor Groove Deformability of DNA: A Molecular Dynamics Free EnergySimulation Study. Abstract:...

319

Characterization of Dynamic Loads on Solar Modules with Respect...  

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

Characterization of Dynamic Loads on Solar Modules with Respect to Fracture of Solar Cells Characterization of Dynamic Loads on Solar Modules with Respect to Fracture of Solar...

320

Tensile stiffness analysis on ocean dynamic power umbilical  

Science Journals Connector (OSTI)

Tensile stiffness of ocean dynamic power umbilical is an important design parameter for ... for the estimation of tensile stiffness of the ocean dynamic power umbilical.

Ming-gang Tang ???; Jun Yan ? ?; Ye Wang ? ?; Qian-jin Yue ???

2014-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

HyDIVE (Hydrogen Dynamic Infrastructure and Vehicle Evolution...  

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

HyDIVE (Hydrogen Dynamic Infrastructure and Vehicle Evolution) Model Analysis HyDIVE (Hydrogen Dynamic Infrastructure and Vehicle Evolution) Model Analysis Presentation by NREL's...

322

Household Response To Dynamic Pricing Of Electricity: A Survey...  

Open Energy Info (EERE)

Household Response To Dynamic Pricing Of Electricity: A Survey Of The Experimental Evidence Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Household Response To Dynamic...

323

Intermittent Single-Molecule Interfacial Electron Transfer Dynamics...  

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

Intermittent Single-Molecule Interfacial Electron Transfer Dynamics. Intermittent Single-Molecule Interfacial Electron Transfer Dynamics. Abstract: We report on single molecule...

324

Dynamical properties of superconducting nanowires  

SciTech Connect (OSTI)

The dynamical properties of thin superconducting wires (nanowires) are studied using numerical simulations based on a one-dimensional time-dependent Ginzburg-Landau equation, which is modified by introducing an order parameter u characterizing the 'purity' of the superconductor material. It is established that relatively long nanowires (with lengths much greater than the coherence length) made of a 'pure' superconductor (u > 1) are characterized by two critical current density values: j{sub c1} and j{sub c2}. For j < j{sub c1}, the total current is entirely superconducting, whereas for j > j{sub c2}, the current is purely normal. In the intermediate region of current densities, j{sub c1} < j < j{sub c2}, the total current contains both superconducting and normal components (mixed state) and the nanowire exhibits the generation of high-frequency electromagnetic waves. The current-voltage characteristics are constructed and the radiation spectrum is obtained. The properties of short superconducting nanowires (with lengths on the order of the coherence length) coincide with those of the Josephson junction. In the case of an 'impure' superconductor (u < 1), the nanowire is characterized by a single critical current density.

Nikolaev, S. V.; Yugay, K. N. [Omsk State University (Russian Federation)], E-mail: yugay_klimenty@mail.ru

2006-02-15T23:59:59.000Z

325

Dynamics of strings between walls  

SciTech Connect (OSTI)

Configurations of vortex strings stretched between or ending on domain walls were previously found to be 1/4 Bogomol'nyi-Prasad-Sommerfield (BPS) states in N=2 supersymmetric gauge theories in 3+1 dimensions. Among zero modes of string positions, the center of mass of strings in each region between two adjacent domain walls is shown to be non-normalizable whereas the rests are normalizable. We study dynamics of vortex strings stretched between separated domain walls by using two methods, the moduli space (geodesic) approximation of full 1/4 BPS states and the charged particle approximation for string end points in the wall effective action. In the first method we explicitly obtain the effective Lagrangian in the strong coupling limit, which is written in terms of hypergeometric functions, and find the 90 deg. scattering for head-on collision. In the second method the domain wall effective action is assumed to be U(1){sup N} gauge theory, and we find a good agreement between two methods for well-separated strings.

Eto, Minoru [INFN, Sezione di Pisa, Largo Pontecorvo, 3, Ed. C, 56127 Pisa (Italy); Department of Physics, University of Pisa Largo Pontecorvo, 3, Ed. C, 56127 Pisa (Italy); Fujimori, Toshiaki; Nagashima, Takayuki [Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551 (Japan); Nitta, Muneto [Department of Physics, Keio University, Hiyoshi, Yokohama, Kanagawa 223-8521 (Japan); Ohashi, Keisuke [Department of Applied Mathematics and Theoretical Physics, University of Cambridge, CB3 0WA (United Kingdom); Sakai, Norisuke [Department of Mathematics, Tokyo Woman's Christian University, Tokyo 167-8585 (Japan)

2009-02-15T23:59:59.000Z

326

Dynamics of Domain Wall Networks  

E-Print Network [OSTI]

Networks or webs of domain walls are admitted in Abelian or non-Abelian gauge theory coupled to fundamental Higgs fields with complex masses. We examine the dynamics of the domain wall loops by using the moduli approximation and find a phase rotation induces a repulsive force which can be understood as a Noether charge of Q-solitons. Non-Abelian gauge theory allows different types of loops which can be deformed to each other by changing a modulus. This admits the moduli geometry like a sandglass made by gluing the tips of the two cigar-(cone-)like metrics of a single triangle loop. We conclude that the sizes of all loops tend to grow for a late time in general models with complex Higgs masses, while the sizes are stabilized at some values once triplet masses are introduced for the Higgs fields. We also show that the stationary motion on the moduli space of the domain wall webs represents 1/4 BPS Q-webs of walls.

Minoru Eto; Toshiaki Fujimori; Takayuki Nagashima; Muneto Nitta; Keisuke Ohashi; Norisuke Sakai

2007-07-22T23:59:59.000Z

327

Dynamics of domain wall networks  

SciTech Connect (OSTI)

Networks or webs of domain walls are admitted in Abelian or non-Abelian gauge theory coupled to fundamental Higgs fields with complex masses. We examine the dynamics of the domain wall loops by using the moduli approximation and find a phase rotation induces a repulsive force which can be understood as a Noether charge of Q-solitons. Non-Abelian gauge theory allows different types of loops which can be deformed to each other by changing a modulus. This admits the moduli geometry like a sandglass made by gluing the tips of the two cigar-(cone-)like metrics of a single triangle loop. We conclude that the sizes of all loops tend to grow for a late time in general models with complex Higgs masses, while the sizes are stabilized at some values once triplet masses are introduced for the Higgs fields. We also show that the stationary motion on the moduli space of the domain wall webs represents 1/4 Bogomol'nyi-Prasad-Sommerfield Q-webs of walls.

Eto, Minoru [INFN, Sezione di Pisa, Largo Pontecorvo, 3, Ed. C, 56127 Pisa (Italy); Department of Physics, University of Pisa Largo Pontecorvo, 3, Ed. C, 56127 Pisa (Italy); Fujimori, Toshiaki; Nagashima, Takayuki; Sakai, Norisuke [Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551 (Japan); Nitta, Muneto [Department of Physics, Keio University, Hiyoshi, Yokohama, Kanagawa 223-8521 (Japan); Ohashi, Keisuke [Department of Applied Mathematics and Theoretical Physics, University of Cambridge, CB3 0WA (United Kingdom)

2007-12-15T23:59:59.000Z

328

Roaming dynamics in Ketene isomerization  

E-Print Network [OSTI]

A reduced two dimensional model is used to study Ketene isomerization reaction. In light of recent results by Ulusoy \\textit{et al.} [J.\\ Phys.\\ Chem.\\ A {\\bf 117}, 7553 (2013)], the present work focuses on the generalization of the roaming mechanism to the Ketene isomerization reaction by applying our phase space approach previously used to elucidate the roaming phenomenon in ion-molecule reactions. Roaming is again found be associated with the trapping of trajectories in a phase space region between two dividing surfaces; trajectories are classified as reactive or nonreactive, and are further naturally classified as direct or non-direct (roaming). The latter long-lived trajectories are trapped in the region of non-linear mechanical resonances, which in turn define alternative reaction pathways in phase space. It is demonstrated that resonances associated with periodic orbits provide a dynamical explanation of the quantum mechanical resonances found in the isomerization rate constant calculations by Gezelter and Miller [J.\\ Chem.\\ Phys.\\ {\\bf 103}, 7868-7876 (1995)]. Evidence of the trapping of trajectories by `sticky' resonant periodic orbits is provided by plotting Poincar\\'e surfaces of section, and a gap time analysis is carried out in order to investigate the statistical assumption inherent in transition state theory for Ketene isomerization.

Frédéric A. L. Mauguière; Peter Collins; Gregory S. Ezra; Stavros C. Farantos; Stephen Wiggins

2014-03-25T23:59:59.000Z

329

Pion scattering and nuclear dynamics  

SciTech Connect (OSTI)

A phenomenological optical-model analysis of pion elastic scattering and single- and double-charge-exchange scattering to isobaric-analog states is reviewed. Interpretation of the optical-model parameters is briefly discussed, and several applications and extensions are considered. The applications include the study of various nuclear properties, including neutron deformation and surface-fluctuation contributions to the density. One promising extension for the near future would be to develop a microscopic approach based on powerful momentum-space methods brought to existence over the last decade. In this, the lowest-order optical potential as well as specific higher-order pieces would be worked out in terms of microscopic pion-nucleon and delta-nucleon interactions that can be determined within modern meson-theoretical frameworks. A second extension, of a more phenomenological nature, would use coupled-channel methods and shell-model wave functions to study dynamical nuclear correlations in pion double charge exchange. 35 refs., 11 figs., 1 tab.

Johnson, M.B.

1988-01-01T23:59:59.000Z

330

Regional Dynamics Model (REDYN) | Open Energy Information  

Open Energy Info (EERE)

Regional Dynamics Model (REDYN) Regional Dynamics Model (REDYN) Jump to: navigation, search Tool Summary Name: REDYN Agency/Company /Organization: Regional Dynamics Inc. Sector: Energy Phase: Determine Baseline, "Evaluate Options and Determine Feasibility" is not in the list of possible values (Bring the Right People Together, Create a Vision, Determine Baseline, Evaluate Options, Develop Goals, Prepare a Plan, Get Feedback, Develop Finance and Implement Projects, Create Early Successes, Evaluate Effectiveness and Revise as Needed) for this property., Develop Goals Topics: Market analysis, Policies/deployment programs, Co-benefits assessment, - Macroeconomic Resource Type: Software/modeling tools User Interface: Desktop Application Website: www.regionaldynamics.com/

331

Critical dynamics of nonperiodic Ising chains  

Science Journals Connector (OSTI)

The critical dynamics of the nonperiodic ferromagnetic Ising chains with two different coupling constants (J1>J2>0) arranged in nonperiodic sequences are studied by trace map method. For Glauber dynamics, it is found that the dynamical critical exponent z=1+J1/J2 for the Fibonacci, general Fibonacci (e.g., silver-mean, copper-mean), and period-doubling ferromagnetic Ising chains. The applicability of the trace map method and the origin of the nonuniversality are briefly discussed.

Peiqing Tong

1997-08-01T23:59:59.000Z

332

Chaotic dynamics in accelerator physics. Progress report  

SciTech Connect (OSTI)

Substantial progress was in several areas of accelerator dynamics. For developing understanding of longitudinal adiabatic dynamics, and for creating efficiency enhancements of recirculating free-electron lasers, was substantially completed. A computer code for analyzing the critical KAM tori that bound the dynamic aperture in circular machines was developed. Studies of modes that arise due to the interaction of coating beams with a narrow-spectrum impedance have begun. During this research educational and research ties with the accelerator community at large have been strengthened.

Cary, J.R.

1992-11-30T23:59:59.000Z

333

SIAM conference on applications of dynamical systems  

SciTech Connect (OSTI)

A conference (Oct.15--19, 1992, Snowbird, Utah; sponsored by SIAM (Society for Industrial and Applied Mathematics) Activity Group on Dynamical Systems) was held that highlighted recent developments in applied dynamical systems. The main lectures and minisymposia covered theory about chaotic motion, applications in high energy physics and heart fibrillations, turbulent motion, Henon map and attractor, integrable problems in classical physics, pattern formation in chemical reactions, etc. The conference fostered an exchange between mathematicians working on theoretical issues of modern dynamical systems and applied scientists. This two-part document contains abstracts, conference program, and an author index.

Not Available

1992-01-01T23:59:59.000Z

334

Bifurcations and Chaos in Simple Dynamical Systems  

E-Print Network [OSTI]

Chaos is an active research subject in the fields of science in recent years. it is a complex and an erratic behavior that is possible in very simple systems. in the present day, the chaotic behavior can be observed in experiments. Many studies have been made in chaotic dynamics during the past three decades and many simple chaotic systems have been discovered. in this work-bifurcations and chaos in simple dynamical systems - the behavior of some simple dynamical systems is studied by constructing mathematical models. investigations are made on the periodic orbits for continuous maps and idea of sensitive dependence on initial conditions,which is the hallmark of chaos, is obtained.

Mrs. T. Theivasanthi

2009-07-16T23:59:59.000Z

335

Stochastic tipping points in climate dynamics  

Science Journals Connector (OSTI)

A crucial question recently raised in climate dynamics concerns abrupt climate transitions: Are they due to a tipping point (TP) being exceeded, or is fast noisy dynamics the cause of their excitation? In this respect, a case study based on a low-order ocean model is developed to show that in an excitable dynamical system perturbed by noise (a possible climate condition) the TPs may have limited physical meaning, with the coherence resonance mechanism being predominant. The analysis is based on an operational definition of stochastic TP, which accounts for the effect of noise and reconciles formally the TP and coherence resonance views.

Stefano Pierini

2012-02-08T23:59:59.000Z

336

Accelerating cycle expansions by dynamical conjugacy  

E-Print Network [OSTI]

Periodic orbit theory provides two important functions---the dynamical zeta function and the spectral determinant for the calculation of dynamical averages in a nonlinear system. Their cycle expansions converge rapidly when the system is uniformly hyperbolic but greatly slowed down in the presence of non-hyperbolicity. We find that the slow convergence can be associated with singularities in the natural measure. A properly designed coordinate transformation may remove these singularities and results in a dynamically conjugate system where fast convergence is restored. The technique is successfully demonstrated on several examples of one-dimensional maps and some remaining challenges are discussed.

Ang Gao; Jianbo Xie; Yueheng Lan

2011-06-06T23:59:59.000Z

337

Determining the Fate of Methane Released from the Seafloor in Deep and Shallow Water Environments  

E-Print Network [OSTI]

) concentration, CH4 concentration and stable isotopic ratios were conducted at two contrasting sites: the Deepwater Horizon (DWH) oil spill in the Gulf of Mexico (GoM) and the natural seep field near Coal Oil Point (COP), CA. The investigation of 1316 DO...

Du, Mengran

2014-08-12T23:59:59.000Z

338

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor  

Science Journals Connector (OSTI)

...host unique features in the form of mud volcanoes, gas seeps, and gas hydrates (Fig. 4). Mud volcanoes and cold gas...sediments, p. 99-139. In I. R. Kaplan (ed.), Natural gases in marine sediments. Plenum, New York, NY. 88...

Beth N. Orcutt; Jason B. Sylvan; Nina J. Knab; Katrina J. Edwards

2011-06-01T23:59:59.000Z

339

Seismic Structure of Shallow Lithosphere at Locations of Distinctive Seafloor Spreading /  

E-Print Network [OSTI]

doi: 10.1029/2002GC000305. Sinton, J. , and Detrick, R. ,J. , Detrick, R. , and Sinton, J. , 2004: Constructing theB. , K. Crook, and J. Sinton (1994), Extensional transform

Henig, Ashlee Shae

2013-01-01T23:59:59.000Z

340

Seafloor geodetic measurements and modeling of Nazca-South America plate convergence  

E-Print Network [OSTI]

3. Nazca-South America plate convergence . II GPS-acousticIII.2: Nazca-South America plate convergenceDecelerat- ing Naza-South America and Nazca-Pac?c plate

Gagnon, Katie L.

2007-01-01T23:59:59.000Z

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


341

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor  

Science Journals Connector (OSTI)

...features in the form of mud volcanoes, gas seeps, and gas hydrates (Fig. 4). Mud volcanoes and cold gas seeps are...gas content, some of the gas can become trapped in gas hydrates, gas-rich ice-like structures formed from the reaction...

Beth N. Orcutt; Jason B. Sylvan; Nina J. Knab; Katrina J. Edwards

2011-06-01T23:59:59.000Z

342

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor  

Science Journals Connector (OSTI)

...fueled by the radioactive decay of naturally radioactive elements (i.e., uranium...visible light is generated from black body radiation from the high-temperature venting fluids...supplemental material). Two commonly occuring clades of uncultivated Thiotrichales...

Beth N. Orcutt; Jason B. Sylvan; Nina J. Knab; Katrina J. Edwards

2011-06-01T23:59:59.000Z

343

Energetics of life on the deep seafloor Craig R. McClaina,1  

E-Print Network [OSTI]

organization. Three distinct types of energy affect biological systems: solar radiation in the form of photons, University of Massachusetts, Boston, MA 02125-3393 Edited* by James H. Brown, University of New Mexico and virtually no in situ productivity, the deep oceans, Earth's largest ecosystem, are especially energy

Myers, Ransom A.

344

Cretaceous palaeopositions of the Falkland Plateau relative to southern Africa using Mesozoic seafloor spreading anomalies  

Science Journals Connector (OSTI)

......Argentine Basins, and the Georgia Basin suggests continental separation...Barrett D. M., 1980. Agulhas Basin magnetic bight, Nature, 287, 591-595...Barrett, D. M., 1980. Agulhas Basin magnetic bight, Nature, 287, 591-595......

A. K. Martin; S. W. Goodlad; C. J. H. Hartnady; A. du Plessis

1982-12-01T23:59:59.000Z

345

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor  

Science Journals Connector (OSTI)

...estimates suggest that seamounts make up a combined area of nearly 30...are commonly enriched in plume waters with elevated sulfur concentrations...Sulfide-oxidizing bacteria make up a large fraction of these groups...times more abundant in the plume waters than in background seawater...

Beth N. Orcutt; Jason B. Sylvan; Nina J. Knab; Katrina J. Edwards

2011-06-01T23:59:59.000Z

346

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor  

Science Journals Connector (OSTI)

...abundances of carbon and energy sources. The upper...microorganisms to overcome the challenge of sulfide and nitrate...also supplemented by energy generation from the...temporally-present significant challenges to scientific advancement...What are the sources of energy, electron acceptors...

Beth N. Orcutt; Jason B. Sylvan; Nina J. Knab; Katrina J. Edwards

2011-06-01T23:59:59.000Z

347

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor  

Science Journals Connector (OSTI)

...traveling along the oceanic conveyor belt (67, 69); the formation...sinking water sets in motion the conveyor belt noted above, which travels...heterotrophy observed in any parcel of water is dependent on the...S. 1991. The great ocean conveyor. Oceanography 4 :79-89...

Beth N. Orcutt; Jason B. Sylvan; Nina J. Knab; Katrina J. Edwards

2011-06-01T23:59:59.000Z

348

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor  

Science Journals Connector (OSTI)

...Margin) during Ocean Drilling Program Expedition...oceans represents the largest water mass on Earth...specialized oceanic drilling vessels (Fig...that, given the large volume of deep sediments...there is also a large clade of uncultivated...deposits from a sealed borehole on the Juan de Fuca...

Beth N. Orcutt; Jason B. Sylvan; Nina J. Knab; Katrina J. Edwards

2011-06-01T23:59:59.000Z

349

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor  

Science Journals Connector (OSTI)

...MacDonald, Florida State University...sediments, rates of microbial...carbon and energy sources...substantial rate of sulfate...reactions may also fuel microbial...metabolic energy, may also...serve as an energy source for...environment could fuel sulfate reduction...However, rates of S oxidation...

Beth N. Orcutt; Jason B. Sylvan; Nina J. Knab; Katrina J. Edwards

2011-06-01T23:59:59.000Z

350

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor  

Science Journals Connector (OSTI)

...pathways and the reactions used for energy generation in the dark ocean...microbiology in the most extreme or energy-limited environments on Earth-for...search for life elsewhere in our solar system and for understanding...chemical reactions to provide energy for life in the dark provide...

Beth N. Orcutt; Jason B. Sylvan; Nina J. Knab; Katrina J. Edwards

2011-06-01T23:59:59.000Z

351

Title: Seafloor Soundings in Polar and Remote Regions --A new instrument for unattended bathymetric observations  

E-Print Network [OSTI]

& Ocean Mapping, Univ. of New Hampshire, 24 Colvos Road, Durham, NH 03824 United States ; ), AD(Hawaii Mapping Research Group University of Hawaii, 1680 East-West Road, Honolulu, HI 96822 United States ; markr@soest.hawaii.edu), AE(Lamont-Doherty Earth Observatory Columbia University, P.O. Box 1000, Palisades, NY 10964

New Hampshire, University of

352

On the intermittency and crystallization mechanisms of sub-seafloor magma chambers  

Science Journals Connector (OSTI)

......that the overall pressure in the magma storage zone is not sufficient to upwell into...magma in the chamber, and the convecting seawater in the permeable surface rocks. Thicknesses...to a hydrothermal boundary at or near seawater temperature (O'C), the layer of 'plated......

C. R. B. Lister

1983-05-01T23:59:59.000Z

353

Seafloor geodetic measurements and modeling of Nazca-South America plate convergence  

E-Print Network [OSTI]

marks the lower limit of unconsolidated sediments of theregion re?ects mostly unconsolidated sediments, par-coupled. The weak, unconsolidated sediments Figure III.11:

Gagnon, Katie L.

2007-01-01T23:59:59.000Z

354

Estimation of heat and chemical fluxes from a seafloor hydrothermal vent field using radon measurements  

Science Journals Connector (OSTI)

... exists at about 200 m above the depth of the vent field12'13. Distinct excess radon levels have been observed at Endeavour both in vent water and in the effluent plume ... vent water and in the effluent plume up to 17 km from the ridge axis14.Radon is a chemically inert gas with a radioactive half life of 3.85 days. ...

N. D. Rosenberg; J. E. Lupton; D. Kadko; R. Collier; M. D. Lilley; H. Pak

1988-08-18T23:59:59.000Z

355

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor  

Science Journals Connector (OSTI)

...reactions used for energy generation in the dark ocean are more...16S rRNA gene surveys, is generally...Processes in the Dark Ocean Although...with secondary energy-generating...Furthermore, a survey of viral genetic...ECOLOGY OF THE DARK OCEAN Building...amount of free energy that is available...

Beth N. Orcutt; Jason B. Sylvan; Nina J. Knab; Katrina J. Edwards

2011-06-01T23:59:59.000Z

356

Microbial Ecology of the Dark Ocean above, at, and below the Seafloor  

Science Journals Connector (OSTI)

...due to reduced abundances of carbon and energy sources. The upper boundary of the deep...microorganisms utilize substrates and gain energy in these environments. At the surface...diverse autotrophic organisms produce energy-rich organic matter by fixing carbon...

Beth N. Orcutt; Jason B. Sylvan; Nina J. Knab; Katrina J. Edwards

2011-06-01T23:59:59.000Z

357

Seafloor Geomorphology as Benthic Habitat. DOI: 2012 Elsevier Inc. All rights reserved.2012  

E-Print Network [OSTI]

. Wright1 , Jed T. Roberts2 , Douglas Fenner3 , John R. Smith4 , Anthony A.P. Koppers5 , David F. Naar6

Wright, Dawn Jeannine

358

Definition: Dynamic Pricing Program | Open Energy Information  

Open Energy Info (EERE)

Pricing Program Pricing Program Jump to: navigation, search Dictionary.png Dynamic Pricing Program Dynamic pricing refers to the family of rates that offer customers time-varying electricity prices on a day-ahead or real-time basis.[1] Related Terms electricity generation References ↑ https://www.smartgrid.gov/category/technology/dynamic_pricing_program [[C LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ategory: Smart Grid Definitionssmart grid,smart grid, |Template:BASEPAGENAME]]smart grid,smart grid, Retrieved from "http://en.openei.org/w/index.php?title=Definition:Dynamic_Pricing_Program&oldid=502620" Category: Definitions What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load)

359

Dynamic Glazing from a Material Science Perspective  

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

Dynamic Glazing from a Material Science Perspective Dynamic Glazing from a Material Science Perspective Speaker(s): Sunnie Lim Date: February 16, 2012 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Dragan Charlie Curcija Advanced window technology has been identified as a component which can greatly reduce the energy consumption of the building envelope. The next generation of advanced windows will involve a "smart-coating" technology where the optical and solar properties can be dynamically controlled. The performance of such coating is ultimately linked to its materials properties such as chemical composition and microstructure. These properties are directly influenced by the deposition process conditions. A promising dynamic windows technology is based upon the electrochromism process. An electrochromic window system consists of a sandwich of

360

Electroacoustical Engineering Fundamentals: The Dynamic Loudspeaker  

Science Journals Connector (OSTI)

In this chapter we will develop the basic electro-mechano-acoustical model of the dynamic cone loudspeaker, detailing how the device attains its flat power response passband and reference efficiency. We will a...

John Eargle

2003-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Dynamic competition model for construction contractors  

E-Print Network [OSTI]

competition, a system dynamics model has been developed based on the identified concepts. In this model, there are three managerial areas in which a contractor makes policy: 1) markup; 2) marketing; and 3) capacity. Each firm's backlog level is considered...

Kim, Hyung Jin

2012-06-07T23:59:59.000Z

362

Crowdsourcing suggestions to programming problems for dynamic  

E-Print Network [OSTI]

). Failing tests thus indicate both missing functionality and incorrect program behavior. We implement CrowdCrowdsourcing suggestions to programming problems for dynamic web development languages Abstract Developers increasingly consult online examples and message boards to find solutions to common programming

Hartmann, Björn

363

Active dendrites enhance neuronal dynamic range  

E-Print Network [OSTI]

Since the first experimental evidences of active conductances in dendrites, most neurons have been shown to exhibit dendritic excitability through the expression of a variety of voltage-gated ion channels. However, despite experimental and theoretical efforts undertaken in the last decades, the role of this excitability for some kind of dendritic computation has remained elusive. Here we show that, owing to very general properties of excitable media, the average output of a model of active dendritic trees is a highly non-linear function of their afferent rate, attaining extremely large dynamic ranges (above 50 dB). Moreover, the model yields double-sigmoid response functions as experimentally observed in retinal ganglion cells. We claim that enhancement of dynamic range is the primary functional role of active dendritic conductances. We predict that neurons with larger dendritic trees should have larger dynamic range and that blocking of active conductances should lead to a decrease of dynamic range.

Leonardo L. Gollo; Osame Kinouchi; Mauro Copelli

2009-02-26T23:59:59.000Z

364

Dynamics of spectral algorithms for distributed routing  

E-Print Network [OSTI]

In the past few decades distributed systems have evolved from man-made machines to organically changing social, economic and protein networks. This transition has been overwhelming in many ways at once. Dynamic, heterogeneous, ...

Maymounkov, Petar (Petar Borissov)

2012-01-01T23:59:59.000Z

365

Superfluid dynamics of 258Fm fission  

E-Print Network [OSTI]

Theoretical description of nuclear fission remains one of the major challenges of quantum many-body dynamics. The slow, mostly adiabatic motion through the fission barrier is followed by a fast, non-adiabatic descent of the potential between the fragments. The latter stage is essentially unexplored. However, it is crucial as it generates most of the excitation energy in the fragments. The superfluid dynamics in the latter stage of fission is obtained with the time-dependent Hartree-Fock theory including BCS dynamical pairing correlations. The fission modes of the 258Fm nucleus are studied. The resulting fission fragment characteristics show a good agreement with experimental data. Quantum shell effects are shown to play a crucial role in the dynamics and formation of the fragments. The importance of quantum fluctuations beyond the independent particle/quasi-particle picture is underlined and qualitatively studied.

Scamps, Guillaume; Lacroix, Denis

2015-01-01T23:59:59.000Z

366

Flexible dynamics of floating wind turbines  

E-Print Network [OSTI]

This work presents Tower Flex, a structural dynamics model for a coupled analysis of offshore floating wind turbines consisting of a tower, a floating platform and a mooring system. In this multi-body, linear frequency-domain ...

Luypaert, Thomas (Thomas J.)

2012-01-01T23:59:59.000Z

367

Dynamics and statics of actin assemblies  

E-Print Network [OSTI]

The conversion of chemical energy into mechanical forces that powers cell movements is a ubiquitous theme across biology. The acrosome reaction of Limulus sperm is a simple example of such a dynamical transformation where ...

Shin, Jennifer Hyunjong, 1974-

2004-01-01T23:59:59.000Z

368

Conceptual aircraft dynamics from inverse aircraft modeling  

E-Print Network [OSTI]

This thesis presents a method of construe' ting a nonlinear dynamics model of a theoretical aircraft from the nonlinear batch simulation of an existing aircrew This method provides control law designers with a method of fabricating nonlinear models...

Ziegler, Gregory E

1999-01-01T23:59:59.000Z

369

Ecology & Earth Systems Dynamics for Educators  

E-Print Network [OSTI]

Ecology & Earth Systems Dynamics for Educators July 21-25, 2014 CI 5540-003 (86282) 3 Credits Science and Earth Science curricula in Minnesota public schools. It is designed primarily for middle

Amin, S. Massoud

370

Molecular Dynamics Simulations of Protein Folding  

Science Journals Connector (OSTI)

I illustrate the use of the replica exchange molecular dynamics (REMD) algorithm to study the folding of a small (57 amino acids) protein that folds into a three-helix bundle, protein A. The REMD is a triviall...

Angel E. Garcia

2008-01-01T23:59:59.000Z

371

Adaptive Spatiotemporal Node Selection in Dynamic Networks  

E-Print Network [OSTI]

Dynamic networks - spontaneous, self-organizing groups of devices - are a promising new computing platform. Writing applications for such networks is a daunting task, however, due to their extreme variability and ...

Hari, Pradip

372

Strong gravitational lensing and dynamical dark energy  

Science Journals Connector (OSTI)

......investigate the nature of dark energy. The forthcoming observational surveys (i.e. CFHT Legacy Survey, SDSS and others...example, the RCS-2 Survey (Gladders et al...discussions on dynamical dark energy models. We also thank......

Andrea V. Macciò

2005-08-21T23:59:59.000Z

373

Vortex driven flame dynamics and combustion instability  

E-Print Network [OSTI]

Combustion instability in premixed combustors mostly arises due to the coupling between heat release rate dynamics and system acoustics. It is crucial to understand the instability mechanisms to design reliable, high ...

Altay, Hurrem Murat

2005-01-01T23:59:59.000Z

374

A Dynamic Theory of Resource Wars  

E-Print Network [OSTI]

We develop a dynamic theory of resource wars and study the conditions under which such wars can be prevented. The interaction between the scarcity of resources and the incentives for war in the presence of limited commitment ...

Aceoglu, Daron

2010-12-31T23:59:59.000Z

375

A Dynamic Theory of Resource Wars  

E-Print Network [OSTI]

We develop a dynamic theory of resource wars and study the conditions under which such wars can be prevented. Our focus is on the interaction between the scarcity of resources and the incentives for war in the presence of ...

Acemoglu, Daron

376

Cyclical dynamics of airline industry earnings  

E-Print Network [OSTI]

Aggregate airline industry earnings have exhibited large-amplitude cyclical behavior since deregulation in 1978. To explore the causes of these cycles we develop a behavioral dynamic model of the airline industry with ...

Pierson, Kawika

377

Non-Born?Oppenheimer Molecular Dynamics  

Science Journals Connector (OSTI)

Non-Born?Oppenheimer Molecular Dynamics ... Electronically nonadiabatic or non-Born?Oppenheimer (non-BO) chemical processes (photodissociation, charge-transfer, etc.) involve a nonradiative change in the electronic state of the system. ...

Ahren W. Jasper; Shikha Nangia; Chaoyuan Zhu; Donald G. Truhlar

2005-08-17T23:59:59.000Z

378

Studies on the dynamics of limited filaments  

E-Print Network [OSTI]

A study on the dynamics of filaments in the presence of a diagnostic, conductive limiter is presented. Plasma filaments are coherent structures present in many fusion devices and transport a significant amount of particles ...

Bonde, Jeffrey David

2010-01-01T23:59:59.000Z

379

Dynamic Fracture Toughness of Polymer Composites  

E-Print Network [OSTI]

that of defense or transport. In this project, the focus is on determining dynamic fracture toughness property of fiber reinforced polymer composites by using a combined numerical- experimental methodology. Impact tests are conducted on Split-Hopkinson pressure...

Harmeet Kaur

2012-02-14T23:59:59.000Z

380

Shared and Dynamic Libraries on Hopper  

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

module unload cray-shem (unless you are making calls to the Cray SHMEM data-passing library) The -dynamic flag instructs the compiler wrappers (i.e., ftn, cc, CC) to prepare a...

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

A Dynamic Model of Thundercloud Electric Fields  

Science Journals Connector (OSTI)

A dynamic interactive computer model of the electrical behavior of a thundercloud surrounded by the distributed atmosphere, earth, ionosphere circuit is described. The electrification mechanisms in the model are represented by current or voltage ...

John S. Nisbet

1983-12-01T23:59:59.000Z

382

A Geometric, Dynamical Approach to Thermodynamics  

E-Print Network [OSTI]

We present a geometric and dynamical approach to the micro-canonical ensemble of classical Hamiltonian systems. In a recent paper [Phys Rev Lett, vol 78, 772-774 (1997)] we showed that under general hypotheses the temperature defined in this ensemble is dynamically observable. Here we generalize the arguments and present simple, explicit formulas showing that also the specific heat and higher order derivatives of the entropy can be observed dynamically. Using perturbation theory we give asymptotic formulas through which the canonical ensemble, at least in principle, can be reconstructed from micro-canonical measurements only. We believe that our approach will prove useful in numerical simulations and provide a natural geometric and dynamical interpretation of the thermodynamics of classical Hamiltonian systems.

Rugh, H H

1997-01-01T23:59:59.000Z

383

Relative Performance Compensation, Contests, and Dynamic Incentives  

Science Journals Connector (OSTI)

Contests (or tournaments) are pervasive in organizations. They help performance evaluation by eliminating common shocks affecting agents' performance. However, tournaments are less effective when participants have heterogeneous ability because participants ... Keywords: dynamic incentives, multitasking, relative performance compensation, tournaments

Pablo Casas-Arce; F. Asís Martínez-Jerez

2009-08-01T23:59:59.000Z

384

Securing Dynamic Membership Information in Multicast Communications  

E-Print Network [OSTI]

insiders and outsiders. We collectively refer to group dynamics information (GDI) as information describing performs group management and has the knowledge of GDI. Although the service provider may release some

Sun, Yan Lindsay

385

A Robust Model Control for Dynamic Systems  

Science Journals Connector (OSTI)

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

S. V. Tararykin; V. V. Tyutikov

2002-05-01T23:59:59.000Z

386

Intercalation dynamics in lithium-ion batteries  

E-Print Network [OSTI]

A new continuum model has been proposed by Singh, Ceder, and Bazant for the ion intercalation dynamics in a single crystal of rechargeable-battery electrode materials. It is based on the Cahn-Hilliard equation coupled to ...

Burch, Damian

2009-01-01T23:59:59.000Z

387

Particle beam dynamics | Princeton Plasma Physics Lab  

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

Particle beam dynamics Particle beam dynamics Subscribe to RSS - Particle beam dynamics The study of the physics of charged particle beams and the accelerators that produce them. This cross-disciplinary area intersects with fields such as plasma physics, high-energy density science, and ultra-fast lasers. Premiere issue of "Quest" magazine details PPPL's strides toward fusion energy and advances in plasma science Quest Magazine Summer 2013 Welcome to the premiere issue of Quest, the annual magazine of the U.S. Department of Energy's Princeton Plasma Physics Laboratory (PPPL). Read more about Premiere issue of "Quest" magazine details PPPL's strides toward fusion energy and advances in plasma science Ronald C Davidson Ronald Davidson heads PPPL research on charged particle beam dynamics and

388

Vortex Dynamics in NanoScale Materials  

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

Into the Vortex: Dynamics in Nanoscale Materials Into the Vortex: Dynamics in Nanoscale Materials Micron and nanosized magnets are of great interest for their potential applications in new electronic devices, such as magnetic random access memories. As the size of magnets is reduced to a 1-micron scale and below, the boundaries (surfaces, perimeters, etc) of the objects begin to profoundly influence both the static and dynamic behavior of the materials. Researchers from Argonne's Materials Science Division (MSD), Center for Nanoscale Materials (CNM), and Advanced Photon Source (APS) have recently examined the dynamics of 3- to 7-micron-diameter NiFe alloy disks with a combination of theoretical calculations and a new time-resolved magnetic imaging technique using synchrotron-based x-ray photoemission electron

389

Dynamic LES Modeling of a Diurnal Cycle  

Science Journals Connector (OSTI)

The diurnally varying atmospheric boundary layer observed during the Wangara (Australia) case study is simulated using the recently proposed locally averaged scale-dependent dynamic subgrid-scale (SGS) model. This tuning-free SGS model enables ...

Sukanta Basu; Jean-François Vinuesa; Andrew Swift

2008-04-01T23:59:59.000Z

390

A Dynamic Defense Force for Japan  

E-Print Network [OSTI]

A Dynamic Defense Force for Japan Sugio TAKAHASHI SUMMARY AGuidelines released by Japan in 2010, the most important isconcept, which will enable the Japan Self-Defense Forces to

TAKAHASHI, Sugio

2012-01-01T23:59:59.000Z

391

The Dynamics of Baroclinic Zonal Jets  

Science Journals Connector (OSTI)

Multiple alternating zonal jets are a ubiquitous feature of planetary atmospheres and oceans. However, most studies to date have focused on the special case of barotropic jets. Here we investigate the dynamics of freely evolving baroclinic jets, ...

Paul D. Williams; Christopher W. Kelsall

392

Hamiltonian engineering via invariants and dynamical algebra  

E-Print Network [OSTI]

We use the dynamical algebra of a quantum system and its dynamical invariants to inverse engineer feasible Hamiltonians for implementing shortcuts to adiabaticity. These are speeded up processes that end up with the same populations than slow, adiabatic ones. As application examples we design families of shortcut Hamiltonians that drive two and a three-level systems between initial and final configurations imposing physically motivated constraints on the terms (generators) allowed in the Hamiltonian.

E. Torrontegui; S. Martínez-Garaot; J. G. Muga

2014-02-24T23:59:59.000Z

393

Spinodal phase decomposition with dissipative fluid dynamics  

SciTech Connect (OSTI)

The spinodal amplification of density fluctuations is treated perturbatively within dissipative fluid dynamics including not only shear and bulk viscosity but also heat conduction, as well as a gradient term in the local pressure. The degree of spinodal amplification is calculated along specific dynamical phase trajectories and the results suggest that the effect can be greatly enhanced by tuning the collision energy so that maximum compression occurs inside the region of spinodal instability.

Randrup, J., E-mail: JRandrup@LBL.gov [Lawrence Berkeley Laboratory, Nuclear Science Division (United States)

2012-06-15T23:59:59.000Z

394

Innovation and the dynamics of global warming  

Science Journals Connector (OSTI)

Abstract Global warming and the carbon cycle are a dynamic system with positive feedbacks. Fossil fuels are exhaustible resources. These two facts mean that innovation in clean energy technology, rather than mitigating global warming, can lead to a permanently higher temperature path. This paper explores the impact of innovation in the simplest model linking the economic theory of exhaustible resources with positive feedback dynamics in the carbon cycle.

Ralph A. Winter

2014-01-01T23:59:59.000Z

395

"Dark energy" as conformal dynamics of space  

E-Print Network [OSTI]

The exact solution for dynamic of conform-flat space homogeneous since dynamic equation is given. Conform mode of space metric changing in Global time theory has negative energy density. Swap of energy to this mode from another ones lead to increasing of Universe homogeneity although probability of this swap from local objects is negligibly small. Conform mode is corresponding to "dark energy" in observation astronomy.

D. Burlankov

2006-10-23T23:59:59.000Z

396

Poisson Bracket Formulation of Nematic Polymer Dynamics  

E-Print Network [OSTI]

We formulate the dynamical theory of nematic polymers, starting from a microscopic Poisson bracket approach. We find that the Poisson bracket between the nematic director and momentum depends on the (Maier-Saupe) order parameter of the nematic phase. We use this to derive reactive couplings of the nematic director to the strain rates. Additionally, we find that local dynamics breaks down as the polymers begin to overlap. We offer a physical picture for both results.

Randall D. Kamien

1999-06-22T23:59:59.000Z

397

Statistics of correlation functions from molecular dynamics  

Science Journals Connector (OSTI)

The statistical uncertainty in the calculation of velocity autocorrelation functions and self-diffusion coefficients from molecular dynamics is empirically determined from the spread of the molecular-dynamics results for an ensemble of macroscopically identical systems. The ‘‘experimental’’ uncertainties of the velocity-autocorrelation-function values at equilibrium and in the presence of flow agree well with theoretical predictions. The uncertainty of the self-diffusion coefficient is found to decrease as the inverse square root of the averaging time.

I. Bitsanis; M. Tirrell; H. Ted Davis

1987-07-15T23:59:59.000Z

398

Heterophase liquid states: Thermodynamics, structure, dynamics  

E-Print Network [OSTI]

An overview of theoretical results and experimental data on the thermodynamics, structure and dynamics of the heterophase glass-forming liquids is presented. The theoretical approach is based on the mesoscopic heterophase fluctuations model (HPFM) developed within the framework of the bounded partition function approach. The Fischer cluster phenomenon, glass transition, liquid-liquid transformations, parametric phase diagram, cooperative dynamics and fragility of the glass-forming liquids is considered.

A. S. Bakai

2015-01-12T23:59:59.000Z

399

Dynamics analysis and learning control for 3-PRPS platform  

Science Journals Connector (OSTI)

Employing a mathematical model to represent the dynamics of robot manipulators is a extremely difficult and complicated task. This study presents the dynamic analysis of parallel robot manipulators. The dynamic equations are first formulated in Cartesian ... Keywords: computer control, dynamics, kinematics, learning control, parallel robotics

Hua-Yi Chuang; Yung-Chih Chang

2001-07-01T23:59:59.000Z

400

DYNAMIC EMBEDDED OPTIMIZATION AND SHOOTING METHODS FOR POWER  

E-Print Network [OSTI]

example of hybrid systems, with in- teractions between continuous dynamics and discrete events playing

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Lattice Boltzmann scheme for fluids with dynamic heterogeneities  

Science Journals Connector (OSTI)

We introduce and discuss a three-dimensional mesoscopic lattice Boltzmann model for the numerical simulation of strongly-interacting fluids with dynamic inhomogeneities. The model is based on an extension of the standard lattice Boltzmann dynamics in which streaming between neighboring lattice sites is constrained by the value of the nonlocal density of the surrounding fluid. The resulting dynamics exhibits typical features of dynamically heterogeneous fluids, such as long-time relaxation, non-Gaussian density distributions and dynamic heterogeneities. Due to its intrinsically parallel dynamics and absence of statistical noise, the method is expected to compute significantly faster than molecular dynamics, Monte Carlo, and lattice glass models.

A. Lamura and S. Succi

2006-06-28T23:59:59.000Z

402

Hierarchical Network Structure Promotes Dynamical Robustness  

E-Print Network [OSTI]

The analysis of dynamical systems that attempts to model chemical reaction, gene-regulatory, population, and ecosystem networks all rely on models having interacting components. When the details of these interactions are unknown for biological systems of interest, one effective approach is to study the dynamical properties of an ensemble of models determined by evolutionary constraints that may apply to all such systems. One such constraint is that of dynamical robustness. Despite previous investigations, the relationship between dynamical robustness-an important functional characteristic of many biological systems-and network structure is poorly understood. Here we analyze the stability and robustness of a large class of dynamical systems and demonstrate that the most hierarchical network structures, those equivalent to the total ordering, are the most robust. In particular, we determine the probability distribution of robustness over system connectivity and show that robustness is maximized by maximizing the number of links between strongly connected components of the graph representing the underlying system connectivity. We demonstrate that this can be understood in terms of the fact that permutation of strongly connected components is a fundamental symmetry of dynamical robustness, which applies to networks of any number of components and is independent of the distribution from which the strengths of interconnection among components are sampled. The classification of dynamical robustness based upon a purely topological property provides a fundamental organizing principle that can be used in the context of experimental validation to select among models that break or preserve network hierarchy. This result contributes to an explanation for the observation of hierarchical modularity in biological networks at all scales.

Cameron Smith; Raymond S. Puzio; Aviv Bergman

2014-12-01T23:59:59.000Z

403

Mercury Dynamics in a San Francisco Estuary Tidal Wetland: Assessing Dynamics Using In Situ Measurements  

E-Print Network [OSTI]

Mercury Dynamics in a San Francisco Estuary Tidal Wetland: Assessing Dynamics Using In Situ the tidally driven exchange of mercury (Hg) between the waters of the San Francisco estuary and Browns Island, respectively--together predicted 94 % of the observed variability in measured total mercury concentra- tion

Boss, Emmanuel S.

404

November 18, 2009 22:50 Vehicle System Dynamics VSD09 Vehicle System Dynamics  

E-Print Network [OSTI]

November 18, 2009 22:50 Vehicle System Dynamics VSD09 Vehicle System Dynamics Vol. 00, No. 00), involving the steering and braking actuators. This VDSC aims at improving automotive vehicle yaw stability the rear wheels) and use the steering actuator only if it is necessary (e.g. if the braking system

Boyer, Edmond

405

Selection of desired dynamics for Dynamic Inversion controlled re-entry vehicles  

E-Print Network [OSTI]

-shaping compensator that affects the closed-loop response of the entire system. This paper attempts to quantify the particular form of desired dynamics that produces the best overall closed-loop performance and robustness in a Dynamic Inversion flight controller...

Georgie, Jennifer Anne

2012-06-07T23:59:59.000Z

406

THE JOURNAL OF CHEMICAL PHYSICS 139, 175102 (2013) Dynamic neutron scattering from conformational dynamics. II. Application  

E-Print Network [OSTI]

#12;THE JOURNAL OF CHEMICAL PHYSICS 139, 175102 (2013) Dynamic neutron scattering from; accepted 12 September 2013; published online 1 November 2013) Neutron scattering experiments directly probe.1063/1.4824071] I. INTRODUCTION Dynamic neutron scattering is a direct probe of the inter- nal, conformational

407

Reaction Dynamics at a C Atom Dynamics of the Simplest Reaction of a Carbon  

E-Print Network [OSTI]

. They concluded that the exchange channel proceeds through an SN2-type inversion mechanism and suggestedReaction Dynamics at a C Atom Dynamics of the Simplest Reaction of a Carbon Atom in a Tetrahedral Environment** Jon P. Camden, Hans A. Bechtel, and Richard N. Zare* Reactions occurring at a carbon center

Zare, Richard N.

408

Turbine bearings and rotor dynamics workshop: proceedings  

SciTech Connect (OSTI)

An EPRI workshop to address turbine bearing reliability improvement and rotor dynamics was co-hosted by Detroit Edison in Dearborn, Michigan on September 8-10, 1982. The 136 attendees represented a broad spectrum of US utilities, equipment manufacturers, and consultants, as well as representatives from England, Japan, and Switzerland. These proceedings contain the text of the formal presentations as well as summaries of the working group sessions which were devoted to topics of particular interest to the workshop participants. Formal presentations were organized under the following general session titles: utility experience and advancements in turbine bearing and lubrication systems; recent advancements in turbine bearing and lubrication systems; utility experience and advancements in turbine-generator rotor dynamics; and recent advancements in turbine-generator rotor dynamics. In addition to the technical presentations, working group sessions were held on selected topics relevant to turbine bearing reliability improvement and rotor dynamics. These groups provided a forum for engineers to exchange ideas and information in a less formal environment. The discussions provided attendees with an opportunity to discuss key issues in more detail and address subjects not covered in the formal presentations. The subjects of these working groups were: rotor dynamic analysis and problem solving; vibration signature analysis and field balancing; oil contamination monitoring and control; and operation and maintenance practices. Individual papers have been entered individually into EDB and ERA.

Brown, R.G.; Quilliam, J.F. (eds.)

1985-06-01T23:59:59.000Z

409

The dynamics of laser droplet generation  

E-Print Network [OSTI]

We propose an experimental setup allowing for the characterization of laser droplet generation in terms of the underlying dynamics, primarily showing that the latter is deterministically chaotic by means of nonlinear time series analysis methods. In particular, we use a laser pulse to melt the end of a properly fed vertically placed metal wire. Due to the interplay of surface tension, gravity force and light-metal interaction, undulating pendant droplets are formed at the molten end, which eventually completely detach from the wire as a consequence of their increasing mass. We capture the dynamics of this process by employing a high-speed infrared camera, thereby indirectly measuring the temperature of the wire end and the pendant droplets. The time series is subsequently generated as the mean value over the pixel intensity of every infrared snapshot. Finally, we employ methods of nonlinear time series analysis to reconstruct the phase space from the observed variable and test it against determinism and stationarity. After establishing that the observed laser droplet generation is a deterministic and dynamically stationary process, we calculate the spectra of Lyapunov exponents. We obtain a positive largest Lyapunov exponent and a negative divergence, i.e., sum of all the exponents, thus indicating that the observed dynamics is deterministically chaotic with an attractor as solution in the phase space. In addition to characterizing the dynamics of laser droplet generation, we outline industrial applications of the process and point out the significance of our findings for future attempts at mathematical modeling.

Blaz Krese; Matjaz Perc; Edvard Govekar

2010-03-01T23:59:59.000Z

410

Slow Dynamics of Orbital Domains in Manganite  

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

Slow Dynamics of Orbital Domains in Manganite Print Slow Dynamics of Orbital Domains in Manganite Print At the ALS, an international team of researchers has used low-energy coherent x rays to extract new knowledge about the correlated motion of groups of self-assembled, outer-lying electrons in the extremely complex electronic system found in manganites. The manganite family of materials has puzzled physicists for years by defying standard models for the motion of electrons in crystals. By controlling the properties of the incident x rays, the researchers were able to map the complexity of a "half-doped" manganite into a far-field speckle diffraction pattern to study the manganite's domain dynamics. Their results suggest the material undergoes a transition characterized by the competition between a pinned orbital domain topology that remains static and mobile domain boundaries that exhibit slow, temporal fluctuations.

411

Energy Dynamics Corporation | Open Energy Information  

Open Energy Info (EERE)

Dynamics Corporation Dynamics Corporation Jump to: navigation, search Name Energy Dynamics Corporation Place Escondido, California Zip 92029 Sector Carbon Product String representation "EDC's technolog ... potable water." is too long. Coordinates 33.12316°, -117.082169° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":33.12316,"lon":-117.082169,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

412

Slow Dynamics of Orbital Domains in Manganite  

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

Slow Dynamics of Orbital Domains in Manganite Print Slow Dynamics of Orbital Domains in Manganite Print At the ALS, an international team of researchers has used low-energy coherent x rays to extract new knowledge about the correlated motion of groups of self-assembled, outer-lying electrons in the extremely complex electronic system found in manganites. The manganite family of materials has puzzled physicists for years by defying standard models for the motion of electrons in crystals. By controlling the properties of the incident x rays, the researchers were able to map the complexity of a "half-doped" manganite into a far-field speckle diffraction pattern to study the manganite's domain dynamics. Their results suggest the material undergoes a transition characterized by the competition between a pinned orbital domain topology that remains static and mobile domain boundaries that exhibit slow, temporal fluctuations.

413

Slow Dynamics of Orbital Domains in Manganite  

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

Slow Dynamics of Orbital Domains in Manganite Print Slow Dynamics of Orbital Domains in Manganite Print At the ALS, an international team of researchers has used low-energy coherent x rays to extract new knowledge about the correlated motion of groups of self-assembled, outer-lying electrons in the extremely complex electronic system found in manganites. The manganite family of materials has puzzled physicists for years by defying standard models for the motion of electrons in crystals. By controlling the properties of the incident x rays, the researchers were able to map the complexity of a "half-doped" manganite into a far-field speckle diffraction pattern to study the manganite's domain dynamics. Their results suggest the material undergoes a transition characterized by the competition between a pinned orbital domain topology that remains static and mobile domain boundaries that exhibit slow, temporal fluctuations.

414

Determining the extent and dynamics of  

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

the extent and dynamics of the extent and dynamics of surface water for the ABoVE field campaign M.L. Carroll 1 , C.M. DiMiceli 2 , J.R.G. Townshend 2 , R.A. Sohlberg 2 1: Sigma Space Corporation 2:University of Maryland The following Data Management Plan was part of the NASA ROSES 2012 Proposal "Determining the extent and dynamics of surface water for the ABoVE field campaign" (Abstract) submitted to the Terrestrial Ecology Program. It is presented as an example plan. Data Management Plan The proposed project will generate 3 new maps of surface water extent in the North American Arctic representing 3 time periods 1991, 2001 and 2011. These maps will be derived from a

415

Dynamics of heat transfer between nano systems  

E-Print Network [OSTI]

We develop a dynamical theory of heat transfer between two nano systems. In particular, we consider the resonant heat transfer between two nanoparticles due to the coupling of localized surface modes having a finite spectral width. We model the coupled nanosystem by two coupled quantum mechanical oscillators, each interacting with its own heat bath, and obtain a master equation for the dynamics of heat transfer. The damping rates in the master equation are related to the lifetimes of localized plasmons in the nanoparticles. We study the dynamics towards the steady state and establish connection with the standard theory of heat transfer in steady state. For strongly coupled nano particles we predict Rabi oscillations in the mean occupation number of surface plasmons in each nano particle.

Svend-Age Biehs; Girish S. Agarwal

2012-10-18T23:59:59.000Z

416

Nearest neighbor Markov dynamics on Macdonald processes  

E-Print Network [OSTI]

Macdonald processes are certain probability measures on two-dimensional arrays of interlacing particles introduced by Borodin and Corwin (arXiv:1111.4408 [math.PR]). They are defined in terms of nonnegative specializations of the Macdonald symmetric functions and depend on two parameters (q,t), where 0Macdonald processes. The classification unites known examples of such dynamics and also yields many new ones. When t = 0, one dynamics leads to a new integrable interacting particle system on the one-dimensional lattice, which is a q-deformation of the PushTASEP (= long-range TASEP). When q = t, the Macdonald processes become the Schur processes of Okounkov and Reshetikhin (arXiv:math/0107056 [math.CO]). In this degeneration, we discover new Robinson--Schensted-type correspondences between words and pairs of Young tableaux that govern some of our dynamics.

Alexei Borodin; Leonid Petrov

2013-05-23T23:59:59.000Z

417

API Requirements for Dynamic Graph Prediction  

SciTech Connect (OSTI)

Given a large-scale time-evolving multi-modal and multi-relational complex network (a.k.a., a large-scale dynamic semantic graph), we want to implement algorithms that discover patterns of activities on the graph and learn predictive models of those discovered patterns. This document outlines the application programming interface (API) requirements for fast prototyping of feature extraction, learning, and prediction algorithms on large dynamic semantic graphs. Since our algorithms must operate on large-scale dynamic semantic graphs, we have chosen to use the graph API developed in the CASC Complex Networks Project. This API is supported on the back end by a semantic graph database (developed by Scott Kohn and his team). The advantages of using this API are (i) we have full-control of its development and (ii) the current API meets almost all of the requirements outlined in this document.

Gallagher, B; Eliassi-Rad, T

2006-10-13T23:59:59.000Z

418

Model Validation with Hybrid Dynamic Simulation  

SciTech Connect (OSTI)

Abstract—Model validation has been one of the central topics in power engineering studies for years. As model validation aims at obtaining reasonable models to represent actual behavior of power system components, it has been essential to validate models against actual measurements or known benchmark behavior. System-wide model simulation results can be compared with actual recordings. However, it is difficult to construct a simulation case for a large power system such as the WECC system and to narrow down to problematic models in a large system. Hybrid dynamic simulation with its capability of injecting external signals into dynamic simulation enables rigorous comparison of measurements and simulation in a small subsystem of interest. This paper presents such a model validation methodology with hybrid dynamic simulation. Two application examples on generator and load model validation are presented to show the validity of this model validation methodology. This methodology is further extended for automatic model validation and dichotomous subsystem model validation.

Huang, Zhenyu; Kosterev, Dmitry; Guttromson, Ross T.; Nguyen, Tony B.

2006-06-18T23:59:59.000Z

419

HelioDynamics Ltd | Open Energy Information  

Open Energy Info (EERE)

HelioDynamics Ltd HelioDynamics Ltd Jump to: navigation, search Name HelioDynamics Ltd Place Cambridge, United Kingdom Zip CB23 2SH Sector Solar Product Manufactures the HD211 product - a solar system which concentrates light onto crystalline silicon PV cells, and also produces hot water. Coordinates 43.003745°, -89.017499° 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":43.003745,"lon":-89.017499,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

420

Definition: Dynamic Capability Rating | Open Energy Information  

Open Energy Info (EERE)

Capability Rating Capability Rating Jump to: navigation, search Dictionary.png Dynamic Capability Rating Dynamic capability rating can be achieved through real-time determination of an element's (e.g., line, transformer etc.) ability to carry load based on electrical and environmental conditions.[1] Related Terms rating References ↑ SmartGrid.gov 'Description of Functions' An LikeLike UnlikeLike You like this.Sign Up to see what your friends like. inline Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Dynamic_Capability_Rating&oldid=506158" Categories: Definitions ISGAN Definitions What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load)

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Dynamic procedure for filtered gyrokinetic simulations  

SciTech Connect (OSTI)

Large eddy simulations (LES) of gyrokinetic plasma turbulence are investigated as interesting candidates to decrease the computational cost. A dynamic procedure is implemented in the gene code, allowing for dynamic optimization of the free parameters of the LES models (setting the amplitudes of dissipative terms). Employing such LES methods, one recovers the free energy and heat flux spectra obtained from highly resolved direct numerical simulations. Systematic comparisons are performed for different values of the temperature gradient and magnetic shear, parameters which are of prime importance in ion temperature gradient driven turbulence. Moreover, the degree of anisotropy of the problem, which can vary with parameters, can be adapted dynamically by the method that shows gyrokinetic large eddy simulation to be a serious candidate to reduce numerical cost of gyrokinetic solvers.

Morel, P.; Banon Navarro, A.; Albrecht-Marc, M.; Carati, D. [Statistical and Plasma Physics Laboratory, Universite Libre de Bruxelles, Bruxelles 1050 (Belgium); Merz, F.; Goerler, T.; Jenko, F. [Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, D-85748 Garching (Germany)

2012-01-15T23:59:59.000Z

422

Dynamics Simulation in a Wave Environment  

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

Coupled Dynamic Simulation in a Wave Coupled Dynamic Simulation in a Wave Environment (Navatek, AEGIR, and WECs) Marine and Hydrokinetics Instrumentation Workshop 9 July 2012 David Kring, Navatek Ltd. Presentation Overview * Introduction to Navatek * AEGIR brief: resistance, seakeeping, global and local loads a 3D, NURBS-based, high-order, Rankine boundary element method ... from same lab as at MIT as WAMIT and SWAN, with pFFT acceleration coupling with controls, structures, aerodynamics, power take-offs * Some WEC applications at Navatek 2 Honolulu, Hawaii, USA Company Background A "Research Shipyard" based in Honolulu, HI Combining simulation-based design with prototype construction

423

A visual simulation playground for engineering dynamics  

E-Print Network [OSTI]

A VISUAL SIMULATION PLAYGROUND FOR ENGINEERING DYNAMICS A Thesis by DONALD BRIAN FONG Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements for the degree of MASTER OF SCIENCE August 2008 Major... Subject: Visualization Sciences A VISUAL SIMULATION PLAYGROUND FOR ENGINEERING DYNAMICS A Thesis by DONALD BRIAN FONG Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements for the degree of MASTER...

Fong, Donald Brian

2008-10-10T23:59:59.000Z

424

Identification and Dynamical Properties of Asteroid Families  

E-Print Network [OSTI]

Asteroids formed in a dynamically quiescent disk but their orbits became gravitationally stirred enough by Jupiter to lead to high-speed collisions. As a result, many dozen large asteroids have been disrupted by impacts over the age of the Solar System, producing groups of fragments known as asteroid families. Here we explain how the asteroid families are identified, review their current inventory, and discuss how they can be used to get insights into long-term dynamics of main belt asteroids. Electronic tables of the membership for 122 notable families are reported on the Planetary Data System node.

Nesvorny, D; Carruba, V

2015-01-01T23:59:59.000Z

425

Protein synthesis driven by dynamical stochastic transcription  

E-Print Network [OSTI]

In this letter we propose a mathematical framework to couple transcription and translation in which mRNA production is described by a set of master equations while the dynamics of protein density is governed by a random differential equation. The coupling between the two processes is given by a stochastic perturbation whose statistics satisfies the master equations. In this approach, from the knowledge of the analytical time dependent distribution of mRNA number, we are able to calculate the dynamics of the probability density of the protein population.

Guilherme C. P. Innocentini; Michael Forger; Fernando Antoneli

2014-06-12T23:59:59.000Z

426

Phenomenological models of socioeconomic network dynamics  

Science Journals Connector (OSTI)

We study a general set of models of social network evolution and dynamics. The models consist of both a dynamics on the network and evolution of the network. Links are formed preferentially between “similar” nodes, where the similarity is defined by the particular process taking place on the network. The interplay between the two processes produces phase transitions and hysteresis, as seen using numerical simulations for three specific processes. We obtain analytic results using mean-field approximations, and for a particular case we derive an exact solution for the network. In common with real-world social networks, we find coexistence of high and low connectivity phases and history dependence.

George C. M. A. Ehrhardt; Matteo Marsili; Fernando Vega-Redondo

2006-09-13T23:59:59.000Z

427

Very Large System Dynamics Models - Lessons Learned  

SciTech Connect (OSTI)

This paper provides lessons learned from developing several large system dynamics (SD) models. System dynamics modeling practice emphasize the need to keep models small so that they are manageable and understandable. This practice is generally reasonable and prudent; however, there are times that large SD models are necessary. This paper outlines two large SD projects that were done at two Department of Energy National Laboratories, the Idaho National Laboratory and Sandia National Laboratories. This paper summarizes the models and then discusses some of the valuable lessons learned during these two modeling efforts.

Jacob J. Jacobson; Leonard Malczynski

2008-10-01T23:59:59.000Z

428

Dynamic Analysis and Modeling of Jansen Mechanism  

Science Journals Connector (OSTI)

Abstract Theo Jansen mechanism is gaining wide spread popularity among legged robotics researchers due to its scalable design, energy efficiency, low payload to machine load ratio, bio-inspired locomotion, deterministic foot trajectory among others. In this paper, we present dynamic analysis of a four legged Theo Jansen link mechanism using projection method that results in constraint force and equivalent Lagrange's equation of motion necessary for any meaningful extension and/or optimization of this niche mechanism. Numerical simulations using MaTX is presented in conjunction with the dynamic analysis. This research sets a theoretical basis for future investigation into Theo Jansen mechanism.

Shunsuke Nansai; Mohan Rajesh Elara; Masami Iwase

2013-01-01T23:59:59.000Z

429

Dynamics of a Tunable Superfluid Junction  

SciTech Connect (OSTI)

We study the population dynamics of a Bose-Einstein condensate in a double-well potential throughout the crossover from Josephson dynamics to hydrodynamics. At barriers higher than the chemical potential, we observe slow oscillations well described by a Josephson model. In the limit of low barriers, the fundamental frequency agrees with a simple hydrodynamic model, but we also observe a second, higher frequency. A full numerical simulation of the Gross-Pitaevskii equation giving the frequencies and amplitudes of the observed modes between these two limits is compared to the data and is used to understand the origin of the higher mode. Implications for trapped matter-wave interferometers are discussed.

LeBlanc, L. J.; Bardon, A. B.; McKeever, J.; Extavour, M. H. T.; Jervis, D.; Thywissen, J. H.; Piazza, F.; Smerzi, A. [Department of Physics, University of Toronto, 60 St. George, Toronto ON, M5S 1A7 (Canada); INO-CNR, BEC Center, and Dipartimento di Fisica, Via Sommarive 14, 38123 Povo, Trento (Italy)

2011-01-14T23:59:59.000Z

430

VUV studies of molecular photofragmentation dynamics  

SciTech Connect (OSTI)

State-resolved, photoion and photoelectron methods are used to study the neutral fragmentation and ionization dynamics of small molecules relevant to atmospheric and combustion chemistry. Photodissociation and ionization are initiated by coherent VUV radiation and the fragmentation dynamics are extracted from measurements of product rovibronic state distributions, kinetic energies and angular distributions. The general aim of these studies is to investigate the multichannel interactions between the electronic and nuclear motions which determine the evolution of the photoexcited {open_quotes}complex{close_quotes} into the observed asymptotic channels.

White, M.G. [Brookhaven National Laboratory, Upton, NY (United States)

1993-12-01T23:59:59.000Z

431

Longitudinal Dynamics and Tomography in the Tevatron  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

Motivated by the desire to understand the longitudinal effects of beam-beam forces, we study the longitudinal dynamics of protons and anti-protons at injection and top energy in the Tevatron. Multi-turn data of the longitudinal profiles are captured to reveal information about frequencies of oscillation, and changes in the bunch distributions. Tomographic reconstruction is used to create phase space maps which are subsequently used to find the momentum distributions. Changes in these distributions for both proton and anti-proton beams are also followed through the operational cycle. We report on the details of interesting dynamics and some unexpected findings.

Stogin, J [Princeton U.; Sen, T [Fermilab; Moore, R S [Fermilab

2012-01-10T23:59:59.000Z

432

Physical simulation study of dynamic voltage instability  

SciTech Connect (OSTI)

This paper presents a physical simulation of the dynamic behavior of voltage instability in an interconnected multimachine environment. The dynamic evolving process leading to eventual voltage collapse, the scenario of the progressive reactive support reduction resulting from the MXL protection relays, the OLTC operation, and the effect of switched-in capacitor banks are examined using physical facilities in the laboratory. The physical simulation results are also compared with digital simulation results. This physical investigation provides a reliable foundation for the effective development of assessment approaches and countermeasures.

Tso, S.K.; Zhu, T.X. [Univ. of Hong Kong (Hong Kong); Zeng, Q.Y. [Electric Power Research Inst., Beijing (China); Lo, K.L. [Univ. of Strathclyde, Glasgow (United Kingdom). Dept. of Electrical and Electrical Engineering

1995-12-31T23:59:59.000Z

433

Steriod dynamics in immature sea turtles  

E-Print Network [OSTI]

STEROID DYNAMICS N IMMATURE S ~ A TURTLES A Tnes xs b YUKI ANN MORRIS n partial Submrtted to the Gracuate Col leoe cf Texas A&M Unrvers'ty fulfxlimen~ o= the regu'remen s for the oegree o MASTER OR SCIEHC December 1BB" Major Subject...: Biology STEROID DYNAMICS IN IMMATURE SEA TURTLES A Thesis by YUKI ANN MORRIS Approved as to styie and content by: David W. Owens (Chairman of Committee) Heimut W. Sauer (Head of Department) Robert C. Bur hardt (Member) Max S. Amoss (Member...

Morris, Yuki A

2012-06-07T23:59:59.000Z

434

Rings in central-force network dynamics  

Science Journals Connector (OSTI)

The central-force network dynamics model for glasses is extended to treat networks involving small regular rings of bonds. In particular, band-limit formulas are obtained for an A2X3 glass consisting of regular puckered six-membered A3X3 rings. The special case of planar rings is compared with observations on vitreous B2O3. This continuous random network of "boroxol" rings shows improved agreement with experiment over a model not containing rings. The remaining discrepancies illustrate the need to include noncentral forces in the network dynamics of v-B2O3.

F. L. Galeener and M. F. Thorpe

1983-11-15T23:59:59.000Z

435

Low Dimensional Dynamics in a Pulsating Star  

E-Print Network [OSTI]

We report the discovery of a low dimensional dynamical system in a 5.5 hr Hubble Space Telescope High Speed Photometer observation of a rapidly oscillating star. The topological description of the phase space orbits is given, as well as a dynamical model which describes the results. This model should motivate theorists of stellar pulsations to search for a three-dimensional system with the same topological structure to describe the mechanisms for pulsation. The equations are compatible with recently proposed nonlinear mode interaction models.

G. B. Mindlin; P. T. Boyd; J. L. Caaminos; J. A. Nunez

1995-10-31T23:59:59.000Z

436

A stochastic evolutionary model for survival dynamics  

E-Print Network [OSTI]

The recent interest in human dynamics has led researchers to investigate the stochastic processes that explain human behaviour in different contexts. Here we propose a generative model to capture the essential dynamics of survival analysis, traditionally employed in clinical trials and reliability analysis in engineering. In our model, the only implicit assumption made is that the longer an actor has been in the system, the more likely it is to have failed. We derive a power-law distribution for the process and provide preliminary empirical evidence for the validity of the model from two well-known survival analysis data sets.

Fenner, Trevor; Loizou, George

2014-01-01T23:59:59.000Z

437

Dynamic safeguard assessment of terror attacks using system dynamics method for nuclear power plants  

Science Journals Connector (OSTI)

For the minimisation of the damage in possible terror attacks on the nuclear power plants and other nuclear facilities, a dynamic assessment is performed in the aspects of nuclear safeguard. The incidents against nuclear facilities are modelled by the time-step scenario. Several cases are explained for the illicit trafficking of radioactive material. The dynamic simulation is examined by the system dynamics method. In the modelling, there are three major models that include the nuclear insider terror, the reaction control and the nuclear forensic steps. The risk increases slowly and decreases rapidly in the result. This is the similar pattern of the September 2001 terror where many lives were lost.

Tae-Ho Woo; Un-Chul Lee; Yun-Il Kim

2010-01-01T23:59:59.000Z

438

Object Exploration By Purposive, Dynamic Viewpoint Adjustment  

E-Print Network [OSTI]

. Unlike previous approaches where exploration is cast as a discrete process (i.e., asking where to look on the object surface that are occluded when the exploration process is initiated. Our goal is to designObject Exploration By Purposive, Dynamic Viewpoint Adjustment Kiriakos N. Kutulakos Charles R. Dyer

Dyer, Charles R.

439

DYNAMIC SCHEDULING M. C. H. Wright  

E-Print Network [OSTI]

for a time interval after which control is returned to the scheduling program to determine the best project who wants more time to evaluate their data can return control to the scheduling program, and come backDYNAMIC SCHEDULING M. C. H. Wright Radio Astronomy Laboratory, University of California, Berkeley

Militzer, Burkhard

440

Economic Viability of Dynamic Spectrum Management  

E-Print Network [OSTI]

and Economics Lab Department of Information Engineering The Chinese University of Hong Kong #12;#12;1 EconomicEconomic Viability of Dynamic Spectrum Management Jianwei Huang Network Communications efficiently. Successful im- plementation of DSM is not a pure engineering issue. It is also a complicated

Huang, Jianwei

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

DYNAMIC MANAGEMENT OF POWER CONSUMPTION Tajana Simunic  

E-Print Network [OSTI]

of the system and decides when and how to force power state transitions. The power manager makes state transition decisions according to the power management policy. The choice of the policy that minimizes powerChapter 1 DYNAMIC MANAGEMENT OF POWER CONSUMPTION Tajana Simunic HP Labs Abstract Power consumption

Simunic, Tajana

442

DYNAMIC ALGORITHMS FOR THE DYCK LANGUAGES  

E-Print Network [OSTI]

DYNAMIC ALGORITHMS FOR THE DYCK LANGUAGES GUDMUND SKOVBJERG FRANDSEN, THORE HUSFELDT, PETER BRO the Dy­ namic Word problem for the free group. We present deterministic algorithms and data structures Las Vegas­ and Monte Carlo­type randomised algorithms to achieve better running times, and present

Miltersen, Peter Bro

443

Nonperturbative short-range dynamics in TMDs  

SciTech Connect (OSTI)

This presentation covers: deep inelastic processes and transverse momentum distributions; chiral symmetry breaking, including the physical picture, the dynamical model, and parton distributions; partonic structures, including transverse momentum distributions, coordinate space correlator, and short range correlations; and measurements of semi-inclusive deep inelastic scattering, correlations, and multi-parton processes in pp interactions.

Weiss, Christian [JLAB

2013-05-01T23:59:59.000Z

444

Asymmetric exclusion processes with constrained dynamics  

E-Print Network [OSTI]

Asymmetric exclusion processes with locally reversible kinetic constraints are introduced to investigate the effect of non-conservative driving forces in athermal systems. At high density they generally exhibit rheological-like behavior, negative differential resistance, two-step structural relaxation, dynamical heterogeneity and, possibly, a jamming transition driven by the external field.

Mauro Sellitto

2008-03-16T23:59:59.000Z

445

Dynamic Fusion of Web Data: Beyond Mashups  

E-Print Network [OSTI]

Dynamic Fusion of Web Data: Beyond Mashups Erhard Rahm Andreas Thor, David Aumüller http search engine architecture Arasu et. al.: Searching the Web. ACM Trans. Internet Techn, 2001 Integration scientists lived close to the VLDB 2007 venue · Data quality for heterogeneous/dirty web data and query

Schüler, Axel

446

Dynamic Response of Ferromagnetic/Nonmagnetic  

E-Print Network [OSTI]

Dynamic Response of Ferromagnetic/Nonmagnetic Layered Structures. ANDREY GROMOV Stockholm 1998 â?? 1 #12; Abstract Responding to the increasing demand for miniaturization and IC integration of RF's equations for the vector potential . Two dioeerent geometries are considered. First is a structure of axial

Haviland, David

447

Advisor Resourcesi Advisor-Group Dynamic  

E-Print Network [OSTI]

Advisor Resourcesi Advisor- Group Dynamic A Mutually Beneficial Relationship Exists Between an Organization and its Advisor An advisor provides the group with: · A "sounding board", someone with whom or perspective · Easy access to campus connections The group provides the advisor with: · A unique opportunity

Sherrill, David

448

Dynamic structural disorder in supported nanoscale catalysts  

SciTech Connect (OSTI)

We investigate the origin and physical effects of “dynamic structural disorder” (DSD) in supported nano-scale catalysts. DSD refers to the intrinsic fluctuating, inhomogeneous structure of such nano-scale systems. In contrast to bulk materials, nano-scale systems exhibit substantial fluctuations in structure, charge, temperature, and other quantities, as well as large surface effects. The DSD is driven largely by the stochastic librational motion of the center of mass and fluxional bonding at the nanoparticle surface due to thermal coupling with the substrate. Our approach for calculating and understanding DSD is based on a combination of real-time density functional theory/molecular dynamics simulations, transient coupled-oscillator models, and statistical mechanics. This approach treats thermal and dynamic effects over multiple time-scales, and includes bond-stretching and -bending vibrations, and transient tethering to the substrate at longer ps time-scales. Potential effects on the catalytic properties of these clusters are briefly explored. Model calculations of molecule-cluster interactions and molecular dissociation reaction paths are presented in which the reactant molecules are adsorbed on the surface of dynamically sampled clusters. This model suggests that DSD can affect both the prefactors and distribution of energy barriers in reaction rates, and thus can significantly affect catalytic activity at the nano-scale.

Rehr, J. J.; Vila, F. D. [Department of Physics, University of Washington, Seattle, Washington 98195 (United States)] [Department of Physics, University of Washington, Seattle, Washington 98195 (United States)

2014-04-07T23:59:59.000Z

449

Laser spectroscopy and dynamics of transient species  

SciTech Connect (OSTI)

The goal of this program is to study the vibrational and electronic spectra and excited state dynamics of a number of transient sulfur and oxygen species. A variety of supersonic jet techniques, as well as high resolution FT-IR and intracavity dye laser spectroscopy, have been applied to these studies.

Clouthier, D.J. [Univ. of Kentucky, Lexington (United States)

1993-12-01T23:59:59.000Z

450

Reaction dynamics in polyatomic molecular systems  

SciTech Connect (OSTI)

The goal of this program is the development of theoretical methods and models for describing the dynamics of chemical reactions, with specific interest for application to polyatomic molecular systems of special interest and relevance. There is interest in developing the most rigorous possible theoretical approaches and also in more approximate treatments that are more readily applicable to complex systems.

Miller, W.H. [Lawrence Berkeley Laboratory, CA (United States)

1993-12-01T23:59:59.000Z

451

Modeling Internet Topology Dynamics Hamed Haddadi  

E-Print Network [OSTI]

graphs. Generation of the topology of the Internet calls for a model that achieves a good balance betweenModeling Internet Topology Dynamics Hamed Haddadi University College London Steve Uhlig Delft and inference, there still exists ambiguity about the real nature of the Internet AS and router level topol- ogy

Haddadi, Hamed

452

Solar Dynamics Observatory/ Extreme Ultraviolet Variability Experiment  

E-Print Network [OSTI]

Solar Dynamics Observatory/ EVE Extreme Ultraviolet Variability Experiment Frequently Asked and model solar extreme ultraviolet irradiance variations due to solar flares, solar rotation, and solar and structure of the Sun. What is solar variability? Solar radiation varies on all time scales ranging from

Mojzsis, Stephen J.

453

ENERGY TRANSPORT IN STOCHASTICALLY PERTURBED LATTICE DYNAMICS  

E-Print Network [OSTI]

of the energy when initially deposited close to the origin. If #12; = 0, the energy spreading is ballisticENERGY TRANSPORT IN STOCHASTICALLY PERTURBED LATTICE DYNAMICS GIADA BASILE, STEFANO OLLA according to a linear transport equation describing inelastic collisions. For an energy and momentum

Recanati, Catherine

454

Nanosecond Lipid Dynamics in Membranes Containing Cholesterol  

SciTech Connect (OSTI)

Lipid dynamics in the cholesterol-rich (40 mol%) liquid-ordered (lo) phase of dimyristoylphosphatidylcholine membranes were studied using neutron spin-echo and neutron backscattering. Recent theoretical and experimental evidence supports the notion of the liquid-ordered phase in phospholipid membranes as a locally structured liquid, with small ordered domains of a highly dynamic nature in equilibrium with a disordered matrix [S. Meinhardt, R. L. C. Vink and F. Schmid, Proc. Natl. Acad. Sci. U. S. A., 2013, 110(12), 4476 4481, C. L. Armstrong et al., PLoS One, 2013, 8(6), e66162]. This local structure was found to have a pronounced impact on the membranes' dynamical properties. We found that the long-wavelength dynamics in the liquid-ordered phase, associated with the elastic properties of the membranes, were faster by two orders of magnitude as compared to the liquid disordered phase. At the same time, collective nanoscale diffusion was significantly slower. The presence of a soft-mode (a slowing down) in the longwavelength dispersion relationship suggests an upper size limit for the ordered lipid domain of ~220 A. Moreover, from the relaxation rate of the collective lipid diffusion of lipid lipid distances, the lifetime of these domains was estimated to be about 100 nanoseconds.

Armstrong, Clare L [McMaster University] [McMaster University; Haeussler, Wolfgang [FRM-II, Technische Universitaet Munchen] [FRM-II, Technische Universitaet Munchen; Seydel, Tilo [Institut Laue-Langevin (ILL)] [Institut Laue-Langevin (ILL); Katsaras, John [ORNL] [ORNL; Rheinstadter, Maikel C [McMaster University] [McMaster University

2014-01-01T23:59:59.000Z

455

Molecular Dynamics Simulations of Supported Pt Nanoclusters  

E-Print Network [OSTI]

¤Introduction and Background ¤Constructing a Physical Model ¤Details of the Simulation ¤Results and Conclusions · Petroleum reformation · Gasification of biomass for biofuels #12;Previous Investigation of NanoclustersMolecular Dynamics Simulations of Supported Pt Nanoclusters Jeffrey Moore #12;A Brief Outline

Washington at Seattle, University of - Department of Physics, Electroweak Interaction Research Group

456

Order, chaos and nuclear dynamics: An introduction  

SciTech Connect (OSTI)

This is an introductory lecture illustrating by simple examples the anticipated effect on collective nuclear dynamics of a transition from order to chaos in the motions of nucleons inside an idealized nucleus. The destruction of order is paralleled by a transition from a rubber-like to a honey-like behaviour of the independent-particle nuclear model. 10 refs., 6 figs.

Swiatecki, W.J.

1990-08-01T23:59:59.000Z

457

Chemical structure and dynamics: Annual report 1993  

SciTech Connect (OSTI)

The Chemical Structure and Dynamics program responds to the need for a fundamental, molecular-level understanding of chemistry at the wide variety of environmentally-important interfaces. The research program is built around the established relationship between structure, thermodynamics, and kinetics. This research effort continues to evolve into a program of rigorous studies of fundamental molecular processes in model systems (e.g., well-characterized surfaces, single-component solutions, clusters, and biological molecules), and studies of complex systems found in the environment. Experimental studies of molecular and supramolecular structures and thermodynamics are key to understanding the nature of matter, and lead to direct comparison with computational results. Kinetic and mechanistic measurements, combined with real-time dynamics measurements of atomic and molecular motions during chemical reactions, provide for a molecular-level description of chemical reactions. The anticipated results of this work are the achievement of a quantitative understanding of chemical processes at complex interfaces, the development of new techniques for the detection and measurement of species at such interfaces, and the interpretation and extrapolation of the observations in terms of models of interfacial chemistry. The Chemical Structure and Dynamics research program includes five areas described in detail in this report: Reaction mechanisms at solid interfaces; Solution and solution interfaces; Structure and dynamics of biological systems; Analytical methods development; and atmospheric chemistry. Extended abstracts are presented for 23 studies.

Colson, S.D.

1994-07-01T23:59:59.000Z

458

Forecasting the Locational Dynamics of Transnational Terrorism  

E-Print Network [OSTI]

Forecasting the Locational Dynamics of Transnational Terrorism: A Network Analytic Approach Bruce A-0406 Fax: (919) 962-0432 Email: skyler@unc.edu Abstract--Efforts to combat and prevent transnational terror of terrorism. We construct the network of transnational terrorist attacks, in which source (sender) and target

Massachusetts at Amherst, University of

459

Free energy in thermo field dynamics  

Science Journals Connector (OSTI)

A formula to obtain the free energy within the framework of thermo field dynamics (a real-time quantum field theory at finite temperature) is presented. The relation to the Matsubara method is discussed. Examples of a perturbation calculation are presented for the ?4 model up to the two-loop order and are compared with the corresponding result obtained in the Matsubara formalism.

H. Matsumoto; Y. Nakano; H. Umezawa

1985-03-15T23:59:59.000Z

460

Optimized dynamic semantic composition of services  

Science Journals Connector (OSTI)

This paper proposes a design for the optimized dynamic (re)composition of services that supports various user requests and accounts for changes in user's context. The composition mechanism relies on semantic descriptions of services' functionality to ... Keywords: context-awareness, domain ontology, semantic similarity, service composition, services

Sorin M. Iacob; João Paulo A. Almeida; Maria E. Iacob

2008-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" 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

Mr. Jamie Gertsch Research Engineer, Vehicle Dynamics  

E-Print Network [OSTI]

of an advanced rollover detection system. ODOT provided us the most current five years (1999-2003) of all truckMr. Jamie Gertsch Research Engineer, Vehicle Dynamics DaimlerChrysler Research and Technology North of cooperation between Portland State University's Intelligent Transportation Systems Laboratory and Daimler

Bertini, Robert L.

462

Dynamic Capabilities Building Blocks of Innovation  

E-Print Network [OSTI]

Pollution Control licensing · 1992 · Irish Environmental Protection Agency. #12;High DC · strategy to `liftDynamic Capabilities Building Blocks of Innovation Rachel Hilliard Centre for Innovation the intellectual capacity of the organisation' · `routine setting of new environmental targets and objectives

Paxton, Anthony T.

463

Pion double charge exchange and hadron dynamics  

SciTech Connect (OSTI)

This paper will review theoretical results to show how pion double charge exchange is contributing to our understanding of hadron dynamics in nuclei. The exploitation of the nucleus as a filter is shown to be essential in facilitating the comparison between theory and experiment. 23 refs., 3 figs., 2 tabs.

Johnson, M.B.

1991-01-01T23:59:59.000Z

464

An E cient Dynamic Mechanism Susan Atheyy  

E-Print Network [OSTI]

for a renewable resource that confers private bene ts to individuals. An electricity production schedule may need-compatible mech- anism for a general dynamic environment with private information. As an intermediate re- sult, we environment, agents observe a sequence of private signals over a number of periods (either nite or countable

Sadeh, Norman M.

465

QCD thermodynamics with dynamical overlap fermions  

E-Print Network [OSTI]

We study QCD thermodynamics using two flavors of dynamical overlap fermions with quark masses corresponding to a pion mass of 350 MeV. We determine several observables on N_t=6 and 8 lattices. All our runs are performed with fixed global topology. Our results are compared with staggered ones and a nice agreement is found.

S. Borsanyi; Y. Delgado; S. Durr; Z. Fodor; S. D. Katz; S. Krieg; T. Lippert; D. Nogradi; K. K. Szabo

2012-04-18T23:59:59.000Z

466

Dynamic simulation of polyester mooring lines  

E-Print Network [OSTI]

A numerical scheme, known as CABLE3D, originally developed for the simulation of dynamics of steel chain-wire mooring lines is extended to allow for the large elongation in a mooring line, the dependence of the modulus on tension, and energy...

Kim, Min Suk

2004-09-30T23:59:59.000Z

467

High-Dynamic-Range Imaging for artists  

Science Journals Connector (OSTI)

An introduction and overview of the practical applications and uses of high-dynamic-range imaging (HDRI) from a production point of view. The course begins with a brief overview of HDRI and pre-production, production, and post-production techniques. ...

Kirt Witte

2009-12-01T23:59:59.000Z

468

Contacts Dynamics Reveals Widom Lines for Jamming  

E-Print Network [OSTI]

We experimentally study the vicinity of the Jamming transition by investigating the statics and the dynamics of the contact network of an horizontally shaken bi-disperse packing of photo-elastic discs. Compressing the packing very slowly, while maintaining a mechanical excitation, yields a granular glass, namely a frozen structure of vibrating grains. In this glass phase, we observe a remarkable dynamics of the contact network, which exhibits strong dynamical heterogeneities. Such heterogeneities are maximum at a packing fraction $\\phi^*$, \\emph{distinct} and smaller than the jamming packing fraction $\\phi_J$, which is indicated by the abrupt variation of the average number of contact per particle. We demonstrate that the two cross-overs, one for the maximum dynamical heterogeneity, and the other for static jamming, converge at point J in the zero mechanical excitation limit, a behavior reminiscent of the Widom lines in the supercritical phase of a second order critical point. Our findings are discussed in the light of recent numerical and theoretical studies of thermal soft spheres.

C. Coulais; R. P. Behringer; O. Dauchot

2012-02-25T23:59:59.000Z

469

Dynamic simulation , 1.1 INTRODUCTION  

E-Print Network [OSTI]

storage tank to prevent flashing in the line. 1.2.2 Propane Storage System Product propane from either receipt as well as product loading. Each of the storage tanks is equipped with one circulation pump Compressor Control system . Dynamic simulation , , , . STEADY STATE

Hong, Deog Ki

470

PML nuclear bodies: dynamic sensors of DNA  

E-Print Network [OSTI]

-a (RAR-a).(8­10) Nuclear domains containing PML are disrupted or dispersed in the lymphocytes of APLPML nuclear bodies: dynamic sensors of DNA damage and cellular stress Graham Dellaire and David P. Bazett-Jones* Summary Promyelocytic leukaemia nuclear bodies (PML NBs) are generally present in all

Dellaire, Graham

471

Dynamic modeling of IGCC power plants  

Science Journals Connector (OSTI)

Integrated Gasification Combined Cycle (IGCC) power plants are an effective option to reduce emissions and implement carbon-dioxide sequestration. The combination of a very complex fuel-processing plant and a combined cycle power station leads to challenging problems as far as dynamic operation is concerned. Dynamic performance is extremely relevant because recent developments in the electricity market push toward an ever more flexible and varying operation of power plants. A dynamic model of the entire system and models of its sub-systems are indispensable tools in order to perform computer simulations aimed at process and control design. This paper presents the development of the lumped-parameters dynamic model of an entrained-flow gasifier, with special emphasis on the modeling approach. The model is implemented into software by means of the Modelica language and validated by comparison with one set of data related to the steady operation of the gasifier of the Buggenum power station in the Netherlands. Furthermore, in order to demonstrate the potential of the proposed modeling approach and the use of simulation for control design purposes, a complete model of an exemplary IGCC power plant, including its control system, has been developed, by re-using existing models of combined cycle plant components; the results of a load dispatch ramp simulation are presented and shortly discussed.

F. Casella; P. Colonna

2012-01-01T23:59:59.000Z

472

DYNAMIC DETECTION OF WORKLOAD EXECUTION PHASES  

E-Print Network [OSTI]

: Electrical Engineering New Mexico State University Las Cruces, New Mexico July 2002 #12;ii "Dynamic Detection;v VITA June 20, 1980 Born in Alamogordo, New Mexico. 1998 Graduated from Alamogordo High School, Alamogordo, New Mexico. 1998-2002 B.S., New Mexico State University, Las Cruces, New Mexico. 2000 and 2001

Johnson, Eric E.

473

First Passage Time for Stochastic Dynamic System  

E-Print Network [OSTI]

First Passage Time for Stochastic Dynamic System and Climate Modeling Peter C Chu Naval Ocean, P.C., 2007: First passage time analysis on climate indices. Journal of Atmospheric and Oceanic. Poberezhny, 2002: Power law decay in model predictability skill. Geophysical Research Letters, 29 (15), 10

Chu, Peter C.

474

3-D numerical investigation of the mantle dynamics associated with the breakup of Pangea  

SciTech Connect (OSTI)

Three-dimensional finite element calculations in spherical geometry are performed to study the response of the mantle with platelike blocks at its surface to an initial condition corresponding to subduction along the margins of Pangea. The mantle is treated as an infinite Prandtl number Boussinesq fluid inside a spherical shell with isothermal, undeformable, free-slip boundaries. Nonsubducting rigid blocks to model continental lithosphere are included in the topmost layer of the computational mesh. At the beginning of the numerical experiments these blocks represent the present continents mapped to their approximate Pangean positions. Asymmetrical downwelling at the margins of these nonsubducting blocks results in a pattern of stresses that acts to pull the supercontinent apart. The calculations suggest that the breakup of Pangea and the subsequent global pattern of seafloor spreading was driven largely by the subduction at the Pangean margins.

Baumgardner, J.R.

1992-01-01T23:59:59.000Z

475

3-D numerical investigation of the mantle dynamics associated with the breakup of Pangea  

SciTech Connect (OSTI)

Three-dimensional finite element calculations in spherical geometry are performed to study the response of the mantle with platelike blocks at its surface to an initial condition corresponding to subduction along the margins of Pangea. The mantle is treated as an infinite Prandtl number Boussinesq fluid inside a spherical shell with isothermal, undeformable, free-slip boundaries. Nonsubducting rigid blocks to model continental lithosphere are included in the topmost layer of the computational mesh. At the beginning of the numerical experiments these blocks represent the present continents mapped to their approximate Pangean positions. Asymmetrical downwelling at the margins of these nonsubducting blocks results in a pattern of stresses that acts to pull the supercontinent apart. The calculations suggest that the breakup of Pangea and the subsequent global pattern of seafloor spreading was driven largely by the subduction at the Pangean margins.

Baumgardner, J.R.

1992-10-01T23:59:59.000Z

476

Quantum effects in unimolecular reaction dynamics  

SciTech Connect (OSTI)

This work is primarily concerned with the development of models for the quantum dynamics of unimolecular isomerization and photodissociation reactions. We apply the rigorous quantum methodology of a Discrete Variable Representation (DVR) with Absorbing Boundary Conditions (ABC) to these models in an attempt to explain some very surprising results from a series of experiments on vibrationally excited ketene. Within the framework of these models, we are able to identify the experimental signatures of tunneling and dynamical resonances in the energy dependence of the rate of ketene isomerization. Additionally, we investigate the step-like features in the energy dependence of the rate of dissociation of triplet ketene to form {sup 3}B{sub 1} CH{sub 2} + {sup 1}{sigma}{sup +} CO that have been observed experimentally. These calculations provide a link between ab initio calculations of the potential energy surfaces and the experimentally observed dynamics on these surfaces. Additionally, we develop an approximate model for the partitioning of energy in the products of photodissociation reactions of large molecules with appreciable barriers to recombination. In simple bond cleavage reactions like CH{sub 3}COCl {yields} CH{sub 3}CO + Cl, the model does considerably better than other impulsive and statistical models in predicting the energy distribution in the products. We also investigate ways of correcting classical mechanics to include the important quantum mechanical aspects of zero-point energy. The method we investigate is found to introduce a number of undesirable dynamical artifacts including a reduction in the above-threshold rates for simple reactions, and a strong mixing of the chaotic and regular energy domains for some model problems. We conclude by discussing some of the directions for future research in the field of theoretical chemical dynamics.

Gezelter, J.D.

1995-12-01T23:59:59.000Z

477

Enterprise design for dynamic complexity : architecting & engineering organizations using system & structural dynamics  

E-Print Network [OSTI]

As the business world is neither linear nor static, the mastery of its "chaotic" nonlinear dynamics lies at the heart of finding high-leverage policies that return uncommon benefits for marginal costs. Today's global ...

Piepenbrock, Theodore F. (Theodore Frederick), 1965-

2004-01-01T23:59:59.000Z

478

Set Covering and Network Optimization: Dynamic and Approximation Algorithms  

E-Print Network [OSTI]

Set Covering and Network Optimization: Dynamic and Approximation Algorithms Orestis A. Telelis summarize our results on development and analysis of approximation and dynamic algorithms for set covering and network optimization problems. The results include probabilistic analysis of set covering algorithms

Kouroupetroglou, Georgios

479

Discontinuity-induced bifurcations of piecewise smooth dynamical systems  

Science Journals Connector (OSTI)

...piecewise smooth dynamical systems M. di Bernardo 1 2...UK 2 Department of Systems and Computer Engineering, University...state of the art in the analysis of discontinuity-induced...piecewise smooth dynamical systems, a particularly relevant...

2010-01-01T23:59:59.000Z

480

Dynamic instabilities imparted by CubeSat deployable solar panels  

E-Print Network [OSTI]

In this work, multibody dynamics simulation was used to investigate the effects of solar panel deployment on CubeSat attitude dynamics. Nominal and partial/asymmetric deployments were simulated for four different solar ...

Peters, Eric David

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dynamics beneath seafloor" from the National Library of EnergyBeta (NLEBeta).
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481

Strategic Dynamic Vehicle Routing with Spatio-Temporal Dependent Demands  

E-Print Network [OSTI]

We study a zero-sum game formulation of a dynamic vehicle routing problem: a system planner seeks to design dynamic routing policies for a team of vehicles to minimize the average waiting time of demands that are strategically ...

Feijer Rovira, Diego Francisc

482

Dynamics of gene expression and signal transduction in single cells  

E-Print Network [OSTI]

Each individual cell is a highly dynamic and complex system. Characterizing dynamics of gene expression and signal transduction is essential to understand what underlie the behavior of the cell and has stimulated much ...

Yang, Qiong, Ph. D. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

483

A Framework for Dynamizing Succinct Data Structures (Extended Abstract)  

E-Print Network [OSTI]

We present a framework to dynamize succinct data structures, to encourage their use over non-succinct versions in a wide variety of important application areas. Our framework can dynamize most stateof- the-art succinct ...

Gupta, Ankur; Hon, Wing-Kai; Shah, Rahul; Vitter, Jeffrey Scott

2007-01-01T23:59:59.000Z

484

A New Grid Security Framework with Dynamic Access Control  

Science Journals Connector (OSTI)

In this paper, a new Grid security framework based on dynamic access control is introduced to address some security problem in Grid. Based on the dynamic evaluating results about ... levels to access rights. In o...

Bing Xie; Xiaolin Gui; Yinan Li; Depei Qian

2004-01-01T23:59:59.000Z

485

The Subthermocline Lens D1. Part II: Kinematics and Dynamics  

Science Journals Connector (OSTI)

The dynamics of a subthermocline lens observed during the POLYMODE Local Dynamics Experiment are examined using density data and measurements of the velocity field obtained by an absolute velocity profiler. It is shown that the momentum balance ...

B. A. Elliott; T. B. Sanford

1986-03-01T23:59:59.000Z

486

Dynamic energy budget theory and population ecology: lessons from Daphnia  

Science Journals Connector (OSTI)

...A. L. M. 2000 Dynamic energy and mass budgets in biological systems. New York, NY: Cambridge University...A. L. M. 2010 Dynamic energy budget theory for metabolic organization. New York, NY: Cambridge University...

2010-01-01T23:59:59.000Z

487

Long-Term Dynamic Monitoring of an Offshore Wind Turbine  

Science Journals Connector (OSTI)

Future Offshore Wind Turbines will be hardly accessible; therefore, in ... modes of the foundation and tower structures. Wind turbines are complex structures and their dynamics vary ... track changes in the dynam...

Christof Devriendt; Filipe Magalhães…

2013-01-01T23:59:59.000Z

488

Can the ring polymer molecular dynamics method be interpreted as real time quantum dynamics?  

SciTech Connect (OSTI)

The ring polymer molecular dynamics (RPMD) method has gained popularity in recent years as a simple approximation for calculating real time quantum correlation functions in condensed media. However, the extent to which RPMD captures real dynamical quantum effects and why it fails under certain situations have not been clearly understood. Addressing this issue has been difficult in the absence of a genuine justification for the RPMD algorithm starting from the quantum Liouville equation. To this end, a new and exact path integral formalism for the calculation of real time quantum correlation functions is presented in this work, which can serve as a rigorous foundation for the analysis of the RPMD method as well as providing an alternative derivation of the well established centroid molecular dynamics method. The new formalism utilizes the cyclic symmetry of the imaginary time path integral in the most general sense and enables the expression of Kubo-transformed quantum time correlation functions as that of physical observables pre-averaged over the imaginary time path. Upon filtering with a centroid constraint function, the formulation results in the centroid dynamics formalism. Upon filtering with the position representation of the imaginary time path integral, we obtain an exact quantum dynamics formalism involving the same variables as the RPMD method. The analysis of the RPMD approximation based on this approach clarifies that an explicit quantum dynamical justification does not exist for the use of the ring polymer harmonic potential term (imaginary time kinetic energy) as implemented in the RPMD method. It is analyzed why this can cause substantial errors in nonlinear correlation functions of harmonic oscillators. Such errors can be significant for general correlation functions of anharmonic systems. We also demonstrate that the short time accuracy of the exact path integral limit of RPMD is of lower order than those for finite discretization of path. The present quantum dynamics formulation also serves as the basis for developing new quantum dynamical methods that utilize the cyclic nature of the imaginary time path integral.

Jang, Seogjoo, E-mail: sjang@qc.cuny.edu [Department of Chemistry and Biochemistry, Queens College and the Graduate Center, City University of New York, 65-30 Kissena Boulevard, Flushing, New York 11367 (United States)] [Department of Chemistry and Biochemistry, Queens College and the Graduate Center, City University of New York, 65-30 Kissena Boulevard, Flushing, New York 11367 (United States); Sinitskiy, Anton V.; Voth, Gregory A., E-mail: gavoth@uchicago.edu [Department of Chemistry, James Franck Institute, Institute for Biophysical Dynamics and Computation Institute, University of Chicago, 5735 S. Ellis Avenue, Chicago, Illinois 60637 (United States)

2014-04-21T23:59:59.000Z

489

Dynamical coupled-channels: the key to understanding resonances  

E-Print Network [OSTI]

Recent developments on a dynamical coupled-channels model of hadronic and electromagnetic production of nucleon resonances are summarized.

B. Julia-Diaz

2007-12-01T23:59:59.000Z

490

Analysis of the influence of tool dynamics in diamond turning  

SciTech Connect (OSTI)

This report describes the progress in defining the role of machine and interface dynamics on the surface finish in diamond turning. It contains a review of literature from conventional and diamond machining processes relating tool dynamics, material interactions and tool wear to surface finish. Data from experimental measurements of tool/work piece interface dynamics are presented as well as machine dynamics for the DTM at the Center.

Fawcett, S.C.; Luttrell, D.E.; Keltie, R.F.

1988-12-01T23:59:59.000Z

491

Molecular dynamics simulation and ab intio studies of electrolytes...  

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

Molecular dynamics simulations: Properties of bulk electrolytes (structure, thermodynamics, transport), interfacial properties of electrolyte at electroactive interfaces,...

492

Dynamic Traffic Assignment Incorporating Commuters’ Trip Chaining Behavior  

E-Print Network [OSTI]

DYNAMIC TRAFFIC ASSIGNMENT INCORPORATING COMMUTERS’ TRIP CHAINING BEHAVIOR A Thesis by WEN WANG Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE August 2011 Major Subject: Civil Engineering Dynamic Traffic Assignment Incorporating Commuters’ Trip Chaining Behavior Copyright 2011 Wen Wang DYNAMIC TRAFFIC ASSIGNMENT...

Wang, Wen

2012-10-19T23:59:59.000Z

493

MAP: Multiauctioneer Progressive Auction for Dynamic Spectrum Access  

E-Print Network [OSTI]

to access the licensed spectrum, and dynamic spectrum access (DSA) is one of the fundamental functions of CR solution according to the length of step. Index Terms--Cognitive radio, dynamic spectrum access, auction from scarcity in spectrum resource and inefficiency in spectrum usage. Cognitive radio (CR) or dynamic

Wang, Xinbing

494

Local dynamic update for component-based distributed systems  

Science Journals Connector (OSTI)

Dynamic evolution is a key aspect of the design, development, and maintenance of complex and distributed software systems built by integrating components. Evolution, traditionally obtained by producing software upgrades, may derive from changes in the ... Keywords: component-based distributed system, dynamic reconfiguration, dynamic software update, software evolution

Valerio Panzica La Manna

2012-06-01T23:59:59.000Z

495

Dynamic software update for component-based distributed systems  

Science Journals Connector (OSTI)

Dynamic evolution is a key aspect of the design, development, and maintenance of complex and distributed software systems built by integrating components. Evolution, tradi- tionally obtained by producing software upgrades, may de- rive from changes in ... Keywords: component-based distributed system, dynamic reconfiguration, dynamic software update, software evolution

Valerio Panzica La Manna

2011-06-01T23:59:59.000Z

496

Beam Dynamics Challenges in High Energy Physics Accelerators!  

E-Print Network [OSTI]

Beam Dynamics Challenges in High Energy Physics Accelerators! Alexander Valishev! University/1/2014!A. Valishev | Beam Dynamics Challenges in HEP Accelerators!2! #12;The Olympic Motto for Accelerators! 12/1/2014!A. Valishev | Beam Dynamics Challenges in HEP Accelerators!3! ENERGY INTENSITY BRIGHTNESS

497

Cybersecurity Dynamics: A Foundation for the Science of Cybersecurity  

E-Print Network [OSTI]

Cybersecurity Dynamics: A Foundation for the Science of Cybersecurity The Framework Research of Cybersecurity Dynamics can serve as a foundation for driving the study of Cybersecurity for the many years to come. First, cyber attacks are inevitable and defenders need to know the dynamic cybersecurity states

Xu, Shouhuai

498

Dynamical systems method (DSM) for nonlinear equations in Banach spaces  

E-Print Network [OSTI]

Dynamical systems method (DSM) for nonlinear equations in Banach spaces A.G. Ramm * Department in revised form 20 December 2004; accepted 22 December 2004 Abstract The DSM (dynamical systems method; Nonlinear problems 1. Introduction In [1] and [2] the DSM (Dynamical systems method) was developed

499

Dynamical systems method (DSM) for nonlinear equations in Banach spaces  

E-Print Network [OSTI]

Dynamical systems method (DSM) for nonlinear equations in Banach spaces A.G. Ramm Mathematics://www.math.ksu.edu/ ramm Abstract The DSM (dynamical systems method) is justified for nonlinear operator equations] the DSM (Dynamical Systems Method) was developed for solving op- erator equations F(u) = 0 (1

500

The Dynamics of Brain-Body-Environment Systems  

E-Print Network [OSTI]

The Dynamics of Brain-Body-Environment Systems in Behavior and Cognition An NSF IGERT Training Program Environment BodyAgent Agent Graduate Traineeships Available in Research Themes * Brain Dynamics the dynamical interaction of brains with bodies, agents with their environments, and agents with other agents

Menczer, Filippo