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1

Components of disaster-tolerant computing: analysis of disaster recovery, IT application downtime and executive visibility  

Science Journals Connector (OSTI)

This paper provides a review of disaster-tolerant Information Technology (IT). The state of traditional disaster recovery approaches is outlined. The risks of IT application downtime attributable to the increasing dependence on critical information ... Keywords: IT application availability, IT application downtime, business continuity, complex infrastructure systems, criticality-driven, disaster recovery, disaster tolerance, disaster-tolerant computing, emergency management, executive visibility, information technology, interaction, interdependent, survivability

Chad M. Lawler; Michael A. Harper; Stephen A. Szygenda; Mitchell A. Thornton

2008-02-01T23:59:59.000Z

2

Unscheduled DNA synthesis and mitochondrial DNA synthetic rate following injury of the facial nerve  

Science Journals Connector (OSTI)

Unscheduled DNA synthesis (UDS) of nuclear DNA and mitochondrial (mt) DNA synthetic rates were determined autoradiographically in different cell ... nerve transection. In addition to an increased synthetic rate ...

H. Korr; V. Philippi; C. Helg; J. Schiefer; M. B. Graeber…

1997-11-01T23:59:59.000Z

3

Unscheduled DNA Synthesis Induced by Procarcinogens in Suspensions and Primary Cultures of Hepatocytes on Collagen Membranes  

Science Journals Connector (OSTI)

...replicating cell populations because it inhibits semiconservative DNA rep lication while allowing unscheduled DNA synthesis to pro ceed. The percentage of replicating cells in suspensions of either hepatocytes or primary cultures is very small (1, 2), although...

George Michalopoulos; Gerald L. Sattler; Lydia O'Connor; Henry C. Pitot

1978-07-01T23:59:59.000Z

4

E-Print Network 3.0 - avoiding unscheduled transcription Sample...  

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

on Reliability, Vol. 58, No. 2, pp. 305-316, June 2009 A Methodology for Determining the Return on Investment Associated with Summary: to a baseline other than unscheduled...

5

High flux isotope reactor: Quarterly report October through December 1986  

SciTech Connect

Two routine cycles of operation of the HFIR reactor were completed during the quarter. The shutdowns to end these cycles were both scheduled. The end-of-cycle 287 shutdown was extended indefinitely to investigate the embrittlement of reactor vessel materials due to radiation damage. The reactor remains down at the end of the quarter. Following the scheduled end-of-cycle 287 shutdown period, subsequent shutdown time was designated as unscheduled. The two scheduled shutdowns, fourth quarter downtime resulting from a third quarter scheduled shutdown, and the extended unscheduled shutdown account for the low 44.2% on-stream time for the quarter. The scheduled control plate replacement and vessel internals inspection was completed at the end-of-cycle 287. The inspection revealed a blister on control cylinder 9. This flaw was attributed to a manufacturing defect.

Corbett, B.L.; Farrar, M.B.

1987-04-01T23:59:59.000Z

6

2014 ALCC Proposals Due  

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

ALCC Proposals Due February 3, 2014 2014 DOE ALCC Proposals Due February 3 December 23, 2013 by Francesca Verdier (0 Comments) DOE's 2014 call for its ASCR Leadership Computing...

7

Building Damage, Death and Downtime Risk Attenuation in Earthquakes  

E-Print Network (OSTI)

quantitative "scenario-based" risk analysis approach as developed to investigate the 3d losses for buildings. The "Redbook Building" is taken as the typical New Zealand construction exemplar and analyzed for the 22 February 2011 Christchurch Earthquake. Losses...

Huang, Yinghui

2012-07-16T23:59:59.000Z

8

2014 NERSC allocation requests due September 22  

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

NERSC allocation requests due September 22 2014 NERSC allocation requests due September 22 August 13, 2013 by Francesca Verdier (0 Comments) NERSC's allocation submission system is...

9

Strategic Industrial Energy Efficiency: Reduce Expenses, Build Revenues, and Control Risk  

E-Print Network (OSTI)

the bother and expense of purchasing fuel in spot markets, which may happen when plants put on extra, unscheduled shifts to compensate for downtime. The net impact of energy efficiency is a reduction in the average price of fuel consumed. Securing fuel... for additional market share. 3. Attain a price premium Plant emissions decline with fuel consumption. A clean process can boast ?green? products. Energy efficiency is usually the quickest and most cost-effective way to contribute to ?green...

Russell, C.

2004-01-01T23:59:59.000Z

10

SSRL BEAM PORT SCHEDULE  

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

1-4 1-4 Oct. 30, 2006 Oct. 31, 2006 Nov. 01, 2006 Nov. 02, 2006 Nov. 03, 2006 Nov. 04, 2006 Nov. 05, 2006 DOWN Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled BEAM LINE 2-1 Oct. 30, 2006 Oct. 31, 2006 Nov. 01, 2006 Nov. 02, 2006 Nov. 03, 2006 Nov. 04, 2006 Nov. 05, 2006 DOWN 8859 B.JOHNSON 8859 B.JOHNSON 8859 B.JOHNSON 8859 B.JOHNSON 8859 B.JOHNSON 8859 B.JOHNSON

11

Rapid Loss Modeling of Death and Downtime Caused By Earthquake Induced Damage to Structures  

E-Print Network (OSTI)

). Figure 2.1(b) thus presents straight line relationship in log-log space for IM and EDP in the form of drift ?. The relationship governing the four-step model and which gives mutual relation between four graphs is (Mander and Sircar 2009): g1838g1838g...3005g3003g3006 = g3628 ? ?g3005g3003g3006 g3628 g3030 = g3628 g1845g3028g1845g3028 g3005g3003g3006 g3628 g3029g3030 = g3628 g1858g3028g1858g3005g3003g3006 g3628 g3029g3030g2879g3038 (2.1) where fa = annual frequency; Sa = spectral acceleration...

Ghorawat, Sandeep

2012-07-16T23:59:59.000Z

12

Violent Wave Motion due to Impact Violent Wave Motion due to Impact  

E-Print Network (OSTI)

Violent Wave Motion due to Impact Violent Wave Motion due to Impact Mark J. Cooker School of Mathematics, University of East Anglia, Norwich, England. m.cooker@uea.ac.uk Theory of Water Waves, Cambridge Motion due to Impact 2. Pressure-Impulse Theory 214 M.J. COOKER AND D.H. PEREGRINE Y; O: .-- I mpact zone

13

Preventive maintenance system for the photomultiplier detector blocks of pet scanners  

DOE Patents (OSTI)

A system including a method and apparatus for preventive maintenance of PET scanner photomultiplier detector blocks is disclosed. The quantitive comparisons used in the method of the present invention to provide an indication in the form of a display or printout advising the user that the photomultiplier block is stable, intermittently unstable, or drifting unstable, and also advising of the expected date of failure of a photomultiplier block in the PET scanner. The system alerts the user to replace the defective photomultiplier block prior to catastrophic failure in a scheduled preventative maintenance program, thus eliminating expensive and unscheduled downtime of the PET scanner due to photomultiplier failure. The apparatus for carrying out the method of the present invention preferably resides in the host computer controlling a PET scanner. It includes a memory adapted for storing a record of a number of iterative adjustments that are necessary to calibrate the gain of a photomultiplier detector block i at a time t.sub.0, a time t.sub.1 and a time T, where T>t.sub.1 >t.sub.0, which is designated as Histo(i,j(t)). The apparatus also includes a processor configured by a software program or a combination of programmed RAM and ROM devices to perform a number of calculations and operations on these values, and also includes a counter for analyzing each photomultiplier detector block i=1 through I of a PET scanner.

Levy, Alejandro V. (Center Moriches, NY); Warner, Donald (Shirley, NY)

1995-01-24T23:59:59.000Z

14

Preventive maintenance system for the photomultiplier detector blocks of PET scanners  

DOE Patents (OSTI)

A system including a method and apparatus for preventive maintenance of PET scanner photomultiplier detector blocks is disclosed. The qualitative comparisons used in the method of the present invention to provide an indication in the form of a display or printout advising the user that the photomultiplier block is stable, intermittently unstable, or drifting unstable, and also advising of the expected date of failure of a photomultiplier block in the PET scanner. The system alerts the user to replace the defective photomultiplier block prior to catastrophic failure in a scheduled preventative maintenance program, thus eliminating expensive and unscheduled downtime of the PET scanner due to photomultiplier failure. The apparatus for carrying out the method of the present invention preferably resides in the host computer controlling a PET scanner. It includes a memory adapted for storing a record of a number of iterative adjustments that are necessary to calibrate the gain of a photomultiplier detector block i at a time t[sub 0], a time t[sub 1] and a time T, where T>t[sub 1]>t[sub 0], which is designated as Histo(i,j(t)). The apparatus also includes a processor configured by a software program or a combination of programmed RAM and ROM devices to perform a number of calculations and operations on these values, and also includes a counter for analyzing each photomultiplier detector block i=1 through I of a PET scanner. 40 figures.

Levy, A.V.; Warner, D.

1995-01-24T23:59:59.000Z

15

Ultrastructural Nuclear Changes Due to Tannic Acid  

Science Journals Connector (OSTI)

...Variations in Ultrastructural Nuclear Changes in Hepatocarcinogenesis...Cytochemical Studies on Nuclear Fine Structure. Exptl...Papers, p. 103. Tokyo, Japan, 1966. 58. Widnell...27 Ultrastructural Nuclear Changes Due to Tannic...Six hours. A high power view of a hepatocyte...

Antonio Racela; Harold Grady; and Donald Svoboda

1967-09-01T23:59:59.000Z

16

Is Hubble's Expansion due to Dark Energy  

E-Print Network (OSTI)

{\\it The universe is expanding} is known (through Galaxy observations) since 1929 through Hubble's discovery ($V = H D$). Recently in 1999, it is found (through Supernovae observations) that the universe is not simply expanding but is accelerating too. We, however, hardly know only $4\\%$ of the universe. The Wilkinson Microwave Anisotropy Probe (WMAP) satellite observational data suggest $73\\%$ content of the universe in the form of dark-energy, $23\\%$ in the form of non-baryonic dark-matter and the rest $4\\%$ in the form of the usual baryonic matter. The acceleration of the universe is ascribed to this dark-energy with bizarre properties (repulsive-gravity). The question is that whether Hubble's expansion is just due to the shock of big-bang & inflation or it is due to the repulsive-gravity of dark-energy? Now, it is believed to be due to dark-energy, say, by re-introducing the once-discarded cosmological-constant $\\Lambda$. In the present paper, it is shown that `the formula for acceleration due to dark-energy' is (almost) exactly of same-form as `the acceleration formula from the Hubble's law'. Hence, it is concluded that: yes, `indeed it is the dark-energy responsible for the Hubble's expansion too, in-addition to the current on-going acceleration of the universe'.

R. C. Gupta; Anirudh Pradhan

2010-10-19T23:59:59.000Z

17

Injuries Due to Firearms in Three Cities  

Science Journals Connector (OSTI)

...its size. Galveston, an island city on the coast of Texas, has a population that is approximately 48 percent non-Hispanic white, 29 percent black, 21 percent Hispanic, and 2 percent Asian. In 1990, 24 percent of Galveston's citizens lived below the federal poverty line. In 1993, Galveston's rate of homicide... Injuries due to firearms are a major health problem in the United States.1–4 Although several studies have documented the impact of firearm-related deaths,5–15 little is known about the epidemiologic characteristics of nonfatal gunshot wounds.16–18 ...

Kellermann A.L.; Rivara F.P.; Lee R.K.

1996-11-07T23:59:59.000Z

18

Extreme events due to localisation of energy  

E-Print Network (OSTI)

We study a one-dimensional chain of harmonically coupled units in an asymmetric anharmonic soft potential. Due to nonlinear localisation of energy, this system exhibits extreme events in the sense that individual elements of the chain show very large excitations. A detailed statistical analysis of extremes in this system reveals some unexpected properties, e.g., a pronounced pattern in the inter event interval statistics. We relate these statistical properties to underlying system dynamics, and notice that often when extreme events occur the system dynamics adopts (at least locally) an oscillatory behaviour, resulting in, for example, a quick succession of such events. The model therefore might serve as a paradigmatic model for the study of the interplay of nonlinearity, energy transport, and extreme events.

Colm Mulhern; Stephan Bialonski; Holger Kantz

2015-01-09T23:59:59.000Z

19

Sound Speed Perturbations Due to Internal Tides  

Science Journals Connector (OSTI)

Internal tides are perhaps the most prevalent and largest amplitude internal gravity waves in the ocean. They are commonly generated by the scattering of surfacetidal energy into internal modes when the surfacetides propagate on to continental shelves. A portion of the internal tidal energy propagates into the deep ocean. One of the effects of internal tides on underwater acoustic propagation is to perturb the temperature and salinity versus depth profiles and thus the sound speed versus depth profile. Starting with temperature and salinity versus depth profiles from near Eleuthera Island the internal tide eigenfunctions as well as the sound speed profile have been computed for a water depth of 4500 m. Assuming a value for the vertical displacement amplitude of a first vertical mode internal tide the perturbed temperature and salinity profiles have been computed. From these perturbed profiles the consequent perturbed sound speed profiles have been computed for cases of maximum up and down internal tide displacement. The first mode internal tide has no vertical displacement at the sea surface and bottom and a maximum near the base of the main thermocline (depth of about 1200 m). Since the SOFAR axis is also near the base of the main thermocline and since the pressureeffects on sound speed are predominant below the SOFAR axis the sound speed perturbation due to the first mode internal tide is greatest at a depth (about 550 m) above the SOFAR axis. An internal tide with a maximum vertical displacement of 10 m produces a maximum sound speed perturbation of ±0.7 m/sec.

Christopher N. K. Mooers

1973-01-01T23:59:59.000Z

20

EAC Meeting Cancelled Due to Weather | Department of Energy  

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

Cancelled Due to Weather EAC Meeting Cancelled Due to Weather March 5, 2013 - 3:06pm Addthis This week's Electricity Advisory Committee (EAC) meeting has been cancelled due to a...

Note: This page contains sample records for the topic "unscheduled downtime due" 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

Sandia National Laboratories: Due Diligence on Lead Acid Battery...  

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

Due Diligence on Lead Acid Battery Recycling March 23, 2011 Lead Acid Batteries on secondary containment pallet Lead Acid Batteries on secondary containment pallet In 2004, the US...

22

Renewable Energy Loan Applications Due Today! | Department of Energy  

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

Renewable Energy Loan Applications Due Today! Renewable Energy Loan Applications Due Today! Renewable Energy Loan Applications Due Today! October 5, 2010 - 12:15pm Addthis Ebony Meeks Former Assistant Press Secretary, Office of Public Affairs If you haven't submitted your Part I application for Department of Energy Loan Guarantee Program's Renewables Solicitation yet, today is your last day! Round 8, Part I applications for DOE's Energy Efficiency, Renewable Energy and Advanced Transmission and Distribution Technologies Solicitation (2009) are due today by midnight EDT. Applicants can submit information through either the online application portal or by using FedConnect and Express Mail. Round 7 and Round 8 Part II applications are due December 31, 2010. The "Renewables Solicitation" invites the submission of applications

23

\\\\due.uci.edu\\due\\Files\\SAC\\CIE\\STAFF\\Duties\\REGIONS.DOC ` 09/06/13 Staff Advisor Regions  

E-Print Network (OSTI)

\\\\due.uci.edu\\due\\Files\\SAC\\CIE\\STAFF\\Duties\\REGIONS.DOC ` 09/06/13 Staff Advisor Regions UCI Study.studyabroad.uci.edu Advisor Countries/Regions (EAP & IOP) EAP Countries Chrystal Fairbanks cfairban@uci.edu (949) 824

Barrett, Jeffrey A.

24

Failure Forewarning in NPP Equipment NERI2000-109 Final Project Report  

SciTech Connect

The objective of this project is forewarning of machine failures in critical equipment at next-generation nuclear power plants (NPP). Test data were provided by two collaborating institutions: Duke Engineering and Services (first project year), and the Pennsylvania State University (Applied Research Laboratory) during the second and third project years. New nonlinear methods were developed and applied successfully to extract forewarning trends from process-indicative, time-serial data for timely, condition-based maintenance. Anticipation of failures in critical equipment at next-generation NPP will improve the scheduling of maintenance activities to minimize safety concerns, unscheduled non-productive downtime, and collateral damage due to unexpected failures. This approach provides significant economic benefit, and is expected to improve public acceptance of nuclear power. The approach is a multi-tiered, model-independent, and data-driven analysis that uses ORNL's novel nonlinear method to extract forewarning of machine failures from appropriate data. The first tier of the analysis provides a robust choice for the process-indicative data. The second tier rejects data of inadequate quality. The third tier removes signal artifacts that would otherwise confound the analysis, while retaining the relevant nonlinear dynamics. The fourth tier converts the artifact-filtered time-serial data into a geometric representation, that is then transformed to a discrete distribution function (DF). This method allows for noisy, finite-length datasets. The fifth tier obtains dissimilarity measures (DM) between the nominal-state DF and subsequent test-state DFs. Forewarning of a machine failure is indicated by several successive occurrences of the DM above a threshold, or by a statistically significant trend in the DM. This paradigm yields robust nonlinear signatures of degradation and its progression, allowing earlier and more accurate detection of the machine failure.

Hively, LM

2004-03-26T23:59:59.000Z

25

Spedding entry closed due to falling debris | The Ames Laboratory  

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

Spedding entry closed due to falling debris Facilities and Engineering Services, with concurrence from ESH&A, has closed the front (north) entrance of Spedding Hall to all but...

26

Channel erosion due to subsurface flow Braunen Smith,1  

E-Print Network (OSTI)

Channel erosion due to subsurface flow Braunen Smith,1 Arshad Kudrolli,1 Alexander E. Lobkovsky,2, and D. H. Rothman, J. Fluid Mech. 503, 357 2004 . 2 A. E. Lobkovsky, B. Smith, A. Kudrolli, D. C. Mohrig

Kudrolli, Arshad

27

Rising Sea Levels Due to Global Warming Are Unstoppable  

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

Levels Due to Global Warming Are Unstoppable Mitigation can slow down but not prevent sea level rise for centuries to come August 5, 2013 Contact: Linda Vu, Lvu@lbl.gov, +1 510 495...

28

Spectral Energy Dissipation due to Surface Wave Breaking  

Science Journals Connector (OSTI)

A semiempirical determination of the spectral dependence of the energy dissipation due to surface wave breaking is presented and then used to propose a model for the spectral dependence of the breaking strength parameter b, defined in the O. M. ...

Leonel Romero; W. Kendall Melville; Jessica M. Kleiss

2012-09-01T23:59:59.000Z

29

Scour around a circular pile due to oscillatory wave motion  

E-Print Network (OSTI)

SCOUR AROUND A CIRCULAR PILE DUE TO OSCILLATORY WAVE MOTION A Thesis by DONALD RAYMOND WELLS Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE January... 1970 Major Subject: Civil Engineering SCOUR AROUND A CIRCULAR PILE DUE TO OSCILLATORY WAVE MOTION A Thesis by DONALD RAYMOND WELLS Approved as to style and content by: hairman of Committee) (Head of Department) ember) . (Member) (Member...

Wells, Donald Raymond

2012-06-07T23:59:59.000Z

30

Due date assignment using ADRES and simulated annealing  

Science Journals Connector (OSTI)

In this paper, flowtime estimation and/or Due Date Assignment (DDA) is studied by making use of a statistical technique, namely Adaptive Response Rate Exponential Smoothing (ADRES) and Simulated Annealing (SA). Primary objective of this study is to compare accuracies of the Due Date Assignment Models (DDAMs). In order to achieve this objective, simulation models are constructed representing different shop load level and using different despatching rules. Case by case findings are summarised in this paper.

Adil Baykasoglu; Mustafa Gocken; Zeynep D. Unutmaz

2008-01-01T23:59:59.000Z

31

Level schedule implementation in unstable manufacturing environments  

E-Print Network (OSTI)

American Axle & Manufacturing Inc. (AAM), headquartered in Detroit (MI) is one of the major Tier 1 suppliers in the automotive industry. The main challenge in AAM plant 2 is production rate unstability due to downtime, ...

López de Haro, Santiago

2008-01-01T23:59:59.000Z

32

Sandia National Laboratories: Structural Health Monitoring  

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

and reduce downtime. A particular focus is to mitigate the large rise in costs for offshore O&M due to access difficulty, weather, high sea states, etc. using structural health...

33

Investigating the Effects of Corrosion on the Fatigue Life of Welded Steel Attachments  

E-Print Network (OSTI)

The railroad industry plays a pivotal role in commerce and greatly impacts America's economy. With this in mind, they cannot afford downtime or service interruptions due to bridge or member replacement. Corrosion of bridges causes millions...

Soape, Jack

2012-07-16T23:59:59.000Z

34

Protecting the Electric Grid from Increasingly Severe Weather Due to  

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

Protecting the Electric Grid from Increasingly Severe Weather Due Protecting the Electric Grid from Increasingly Severe Weather Due to Climate Change Protecting the Electric Grid from Increasingly Severe Weather Due to Climate Change August 12, 2013 - 5:25pm Addthis Transmission lines along Highway 15 outside Victorville, California. | Photo courtesy of Abby Rowling. Transmission lines along Highway 15 outside Victorville, California. | Photo courtesy of Abby Rowling. Patricia A. Hoffman Patricia A. Hoffman Assistant Secretary, Office of Electricity Delivery & Energy Reliability Jim Stock Member - White House Council of Economic Advisers EDITOR'S NOTE: This article originally appeared on WhiteHouse.gov. This week marks the tenth anniversary of one of the worst power outages in the United States, during which tens of millions of Americans were affected

35

Protecting the Electric Grid from Increasingly Severe Weather Due to  

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

Protecting the Electric Grid from Increasingly Severe Weather Due Protecting the Electric Grid from Increasingly Severe Weather Due to Climate Change Protecting the Electric Grid from Increasingly Severe Weather Due to Climate Change August 12, 2013 - 5:25pm Addthis Transmission lines along Highway 15 outside Victorville, California. | Photo courtesy of Abby Rowling. Transmission lines along Highway 15 outside Victorville, California. | Photo courtesy of Abby Rowling. Patricia A. Hoffman Patricia A. Hoffman Assistant Secretary, Office of Electricity Delivery & Energy Reliability Jim Stock Member - White House Council of Economic Advisers EDITOR'S NOTE: This article originally appeared on WhiteHouse.gov. This week marks the tenth anniversary of one of the worst power outages in the United States, during which tens of millions of Americans were affected

36

BOUSSINESQ MODELING OF SURFACE WAVES DUE TO UNDERWATER LANDSLIDES  

E-Print Network (OSTI)

BOUSSINESQ MODELING OF SURFACE WAVES DUE TO UNDERWATER LANDSLIDES DENYS DUTYKH AND HENRIK KALISCH, and viscous drag. The surface waves are studied in the Boussinesq scaling, with time-dependent bathymetry. A numerical model for the Boussinesq equations is introduced which is able to handle time-dependent bottom

Paris-Sud XI, Université de

37

BOUSSINESQ MODELING OF SURFACE WAVES DUE TO UNDERWATER LANDSLIDES  

E-Print Network (OSTI)

BOUSSINESQ MODELING OF SURFACE WAVES DUE TO UNDERWATER LANDSLIDES DENYS DUTYKH # AND HENRIK KALISCH, and viscous drag. The surface waves are studied in the Boussinesq scaling, with time­dependent bathymetry. A numerical model for the Boussinesq equations is introduced which is able to handle time­dependent bottom

38

Compressed Gas Cylinder Safety I. Background. Due to the nature  

E-Print Network (OSTI)

Compressed Gas Cylinder Safety I. Background. Due to the nature of gas cylinders hazards of a ruptured cylinder. There are almost 200 different types of materials in gas cylinders, there are several general procedures to follow for safe storage and handling of a compressed gas cylinder: II

Suzuki, Masatsugu

39

Resonant Heating Due to Cyclotron Subharmonic Frequency Waves  

Science Journals Connector (OSTI)

A direct ion heating process which is resonant with the wave at the cyclotron subharmonic frequency, ?=32?i, is discovered through the particle-simulation investigation of the ion Bernstein-wave heating. The particle trapping in phase space due to the wave of an arbitrary cyclotron subharmonic frequency is studied theoretically and numerically confirmed.

H. Abe; H. Okada; R. Itatani; M. Ono; H. Okuda

1984-09-17T23:59:59.000Z

40

Plastic strain due to twinning in austenitic TWIP steels  

E-Print Network (OSTI)

Plastic strain due to twinning in austenitic TWIP steels B. Qin and H. K. D. H. Bhadeshia* Twinning induced plasticity steels are austenitic alloys in which mechanical twinning is a prominent deformation, Twinning, Twinning induced plasticity, Automobiles Introduction Mechanical twinning is a plastic

Cambridge, University of

Note: This page contains sample records for the topic "unscheduled downtime due" 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

PRESSURIZATION OF FIXED ROOF STORAGE TANKS DUE TO EXTERNAL FIRES  

E-Print Network (OSTI)

PRESSURIZATION OF FIXED ROOF STORAGE TANKS DUE TO EXTERNAL FIRES Fabien FouiHen, INERIS, Parc. Reflections led on this accident have pushed to consider the phenomenon of tank pressurization as a potential initiating event of the fire ball observed. In concrete terms, when a fixed roof storage tank is surrounded

Paris-Sud XI, Université de

42

Parton energy loss due to synchrotron-like gluon emission  

E-Print Network (OSTI)

We develop a quasiclassical theory of the synchrotron-like gluon radiation. Our calculations show that the parton energy loss due to the synchrotron gluon emission may be important in the jet quenching phenomenon if the plasma instabilities generate a sufficiently strong chromomagnetic field. Our gluon spectrum disagrees with that obtained by Shuryak and Zahed within the Schwinger's proper time method.

B. G. Zakharov

2008-09-03T23:59:59.000Z

43

Computation of seismic attenuation and dispersion due to ...  

E-Print Network (OSTI)

Jun 23, 2006 ... due to mesoscopic heterogeneity in porous materials ... permeability and L a characteristic patch size of the .... The inverse quality factor ..... in shaly sediments or a fracture embedded in a sandstone are natural ..... Archie, G. E., The electrical resistivity log as an aid in determining some reservoir char-.

masson@localhost.localdomain (masson)

2006-07-08T23:59:59.000Z

44

ANSI Essential Requirements: Due process requirements for American  

E-Print Network (OSTI)

ANSI Essential Requirements: Due process requirements for American National Standards Edition: January 2010 Copyright by the American National Standards Institute (ANSI), 25 West 43rd Street, 4th Floor, New York, New York 10036. This material may be copied without permission from ANSI only

45

Transverse Effect due to Short-range Resistive Wall Wakefield  

SciTech Connect

For accelerator designs with ultra short electron beams, beam dynamics study has to invoke the short-range wakefields. In this paper, we first obtain the short-range dipole mode resistive wall wakefield. Analytical approach is then developed to study the single bunch transverse beam dynamics due to this short-range resistive wall wake. The results are applied to the LCLS undulator.

Juhao Wu; Alex Chao; Jean Delayen

2007-06-18T23:59:59.000Z

46

Oil and Gas Production Optimization; Lost Potential due to Uncertainty  

E-Print Network (OSTI)

Oil and Gas Production Optimization; Lost Potential due to Uncertainty Steinar M. Elgsaeter Olav.ntnu.no) Abstract: The information content in measurements of offshore oil and gas production is often low, and when in the context of offshore oil and gas fields, can be considered the total output of production wells, a mass

Johansen, Tor Arne

47

Rising Sea Levels Due to Global Warming Are Unstoppable  

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

Rising Sea Levels Rising Sea Levels Due to Global Warming Are Unstoppable Rising Sea Levels Due to Global Warming Are Unstoppable Mitigation can slow down but not prevent sea level rise for centuries to come August 5, 2013 Contact: Linda Vu, Lvu@lbl.gov, +1 510 495 2402 washington.jpg Because seawater absorbs heat more slowly than the atmosphere above it, our oceans won't feel the full impact of the greenhouse gases already in the air for hundreds of years. Warm water expands, raising sea levels. (Courtesy W. Washington) Select to enlarge. A reduction in greenhouse gas emissions could greatly lessen the impacts of climate change. However, the gases already added to the atmosphere ensure a certain amount of sea level rise to come, even if future emissions are reduced. A study by National Center for Atmospheric Research (NCAR)

48

Sound radiation due to rapid deformation of an impacted plate  

Science Journals Connector (OSTI)

Sound radiation due to forced deformation of an impacted plate was investigated. An initial sound pressure pulse due to rapid local deformation of a plate was generated before the radiation from natural modes of the plate occurred. On the axis of impact near the plate a distinct pressure pulse is observed to reproduce the velocity waveform of the plate at the opposite side of the impact point. Data from experiments involving impact of spheres on plates differing in size and material properties are presented to show the plate behavior and the radiated soundpressure. Theoretical results were obtained from an analytical model in which impulsive acceleration of a plate with Gaussian spatial distribution is convoluted with the acceleration?time history of the actual impact. Theoretical results for the on?axis pressure are compared with the experimental results.

Adnan Akay; Reginald O. Cook

1978-01-01T23:59:59.000Z

49

The electrical resistance due to nonmagnetic impurities in ferromagnetic metals  

Science Journals Connector (OSTI)

We discuss the electrical resistance due to nonmagnetic impurities in ferromagnetic metals. The impurity resistance depends on the magnetization of the host metal since (1) the densities of states of ±spin electrons at the Fermi surface change with the magnetization of a metal and (2) the screened impurity potential is different for the ±spin electrons and depends on the magnetization of the metal. The effect of the spin dependent screening on the electrical resistance in ferromagnetic metals was not fully considered previously. We choose a single band model for the metallic electrons and obtain an expression for the resistance which includes both of the above mechanisms (1) and (2) simultaneously and self?consistently. We calculate the changes in resistivity due to nonmagnetic impurities in a ferromagnetic metal as a function of magnetization.

D. J. Kim; Brian B. Schwartz

1975-01-01T23:59:59.000Z

50

Comment on “Air Emissions Due to Wind and Solar Power”  

Science Journals Connector (OSTI)

Comment on “Air Emissions Due to Wind and Solar Power” ... Energy Analysis Department, Lawrence Berkeley National Laboratory, Berkeley, California 94720 ... This work was funded by the Office of Energy Efficiency and Renewable Energy (Wind & Hydropower Technologies Program and Solar Energy Technologies Program) and by the Office of Electricity Delivery and Energy Reliability (Permitting, Siting, and Analysis Division) of the U.S. Department of Energy under Contract DE-AC02-05CH11231 with Lawrence Berkeley National Laboratory and Contract DE-AC36-08-GO28308 with the National Renewable Energy Laboratory. ...

Andrew Mills; Ryan Wiser; Michael Milligan; Mark O’Malley

2009-07-07T23:59:59.000Z

51

Charge Transport Anisotropy Due to Grain Boundaries in Directionally  

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

Charge Transport Anisotropy Due to Grain Charge Transport Anisotropy Due to Grain Boundaries in Directionally Crystallized Thin Films of Regio-Regular Poly(3-hexylthiophene) Semicrystalline polymers, such as polythiophenes, hold much promise as active layers in printable electronic devices such as photovoltaic cells, sensors, and thin film transistors. As organic semiconductors approach commercialization, there is a need to better understand the relationship between charge transport and microstructure, in particular, to identify the inherent bottlenecks to charge transport. In semicrystalline and polycrystalline materials, charge transport is most likely dominated by grain-boundary effects, although the exact mechanism is not well understood. Unfortunately, grain boundaries in semicrystalline thin films are difficult to characterize: the grains are too small to allow for measurements across individual grain boundaries (as is often done for polycrystalline films of small molecules) and bulk measurements are complicated by the unknown orientation of polymer chains within the grain. To better understand the effect of chain orientation on grain boundaries, we use anisotropic thin films of poly(3-hexylthiophene) (P3HT) - one of the most well-studied polymeric semiconductors, as a tool to study charge transport.

52

Moisture Risk in Unvented Attics Due to Air Leakage Paths  

SciTech Connect

IBACOS completed an initial analysis of moisture damage potential in an unvented attic insulated with closed-cell spray polyurethane foam. To complete this analysis, the research team collected field data, used computational fluid dynamics to quantify the airflow rates through individual airflow (crack) paths, simulated hourly flow rates through the leakage paths with CONTAM software, correlated the CONTAM flow rates with indoor humidity ratios from Building Energy Optimization software, and used Warme und Feuchte instationar Pro two-dimensional modeling to determine the moisture content of the building materials surrounding the cracks. Given the number of simplifying assumptions and numerical models associated with this analysis, the results indicate that localized damage due to high moisture content of the roof sheathing is possible under very low airflow rates. Reducing the number of assumptions and approximations through field studies and laboratory experiments would be valuable to understand the real-world moisture damage potential in unvented attics.

Prahl, D.; Shaffer, M.

2014-11-01T23:59:59.000Z

53

REDUCTION OF DRIFT EFFECTS DUE TO SOLAR WIND TURBULENCE  

SciTech Connect

Gradient and curvature drift play a key role in the modulation of cosmic rays. Reduction in the drift coefficient due to turbulence has been demonstrated unambiguously through direct numerical simulations, but a theory that can explain these results is still lacking. We introduce a parameterized form of the drift coefficient based on direct numerical simulations and show that good agreement with observed proton energy spectra at Earth can be found when it is used in a numerical modulation model. We show that the turbulence ultrascale, for which no observations currently exist, plays an important role in drift reduction. The magnitude at Earth and spatial dependence of this quantity required to fit cosmic-ray observations at Earth are argued to be plausible based on the required properties of the two-dimensional turbulence spectrum at large scales.

Burger, R. A.; Visser, D. J. [Unit for Space Physics, North-West University, 2520 Potchefstroom (South Africa)

2010-12-10T23:59:59.000Z

54

Changes in Dimethyl Sulfide Oceanic Distribution due to Climate Change  

SciTech Connect

Dimethyl sulfide (DMS) is one of the major precursors for aerosols and cloud condensation nuclei in the marine boundary layer over much of the remote ocean. Here they report on coupled climate simulations with a state-of-the-art global ocean biogeochemical model for DMS distribution and fluxes using present-day and future atmospheric CO{sub 2} concentrations. They find changes in zonal averaged DMS flux to the atmosphere of over 150% in the Southern Ocean. This is due to concurrent sea ice changes and ocean ecosystem composition shifts caused by changes in temperature, mixing, nutrient, and light regimes. The largest changes occur in a region already sensitive to climate change, so any resultant local CLAW/Gaia feedback of DMS on clouds, and thus radiative forcing, will be particularly important. A comparison of these results to prior studies shows that increasing model complexity is associted with reduced DMS emissions at the equator and increased emissions at high latitudes.

Cameron-Smith, P; Elliott, S; Maltrud, M; Erickson, D; Wingenter, O

2011-02-16T23:59:59.000Z

55

Optical analog of Rabi oscillation suppression due to atomic motion  

E-Print Network (OSTI)

The Rabi oscillations of a two-level atom illuminated by a laser on resonance with the atomic transition may be suppressed by the atomic motion through averaging or filtering mechanisms. The optical analogs of these velocity effects are described. The two atomic levels correspond in the optical analogy to orthogonal polarizations of light and the Rabi oscillations to polarization oscillations in a medium which is optically active, naturally or due to a magnetic field. In the later case, the two orthogonal polarizations could be selected by choosing the orientation of the magnetic field, and one of them be filtered out. It is argued that the time-dependent optical polarization oscillations or their suppression are observable with current technology.

J. G. Muga; B. Navarro

2005-05-13T23:59:59.000Z

56

Assessment of annoyance due to wind turbine noise  

Science Journals Connector (OSTI)

The overall aim of this study was to evaluate the perception and annoyance of noise from wind turbines in populated areas of Poland. The study group comprised 156 subjects. All subjects were interviewed using a questionnaire developed to enable evaluation of their living conditions including prevalence of annoyance due to noise from wind turbines and the self-assessment of physical health and wellbeing. In addition current mental health status of respondents was assessed using Goldberg General Health Questionnaire GHQ-12. For areas where respondents lived A-weighted sound pressure levels (SPLs) were calculated as the sum of the contributions from the wind power plants in the specific area. It has been shown that the wind turbine noise at the calculated A-weighted SPL of 30?48 dB was perceived as annoying outdoors by about one third of respondents while indoors by one fifth of them. The proportions of the respondents annoyed by the wind turbine noise increased with increasing A-weighted sound pressure level. Subjects' attitude to wind turbines in general and sensitivity to landscape littering was found to have significant impact on the perceived annoyance. Further studies are needed including a larger number of respondents before firm conclusions can be drawn.

Malgorzata Pawlaczyk-Luszczynska; Kamil Zaborowski; Malgorzata Zamojska; Malgorzata Waszkowska

2013-01-01T23:59:59.000Z

57

Assessment of annoyance due to wind turbine noise  

Science Journals Connector (OSTI)

The overall aim of this study was to evaluate the perception and annoyance of noise from wind turbines in populated areas of Poland. The study group comprised 378 subjects. All subjects were interviewed using a questionnaire developed to enable evaluation of their living conditions including prevalence of annoyance due to noise from wind turbines and the self-assessment of physical health and well-being. In addition current mental health status of respondents was assessed using Goldberg General Health Questionnaire GHQ-12. For areas where respondents lived A-weighted sound pressure levels (SPLs) were calculated as the sum of the contributions from the wind power plants in the specific area. It has been shown that the wind turbine noise at the calculated A-weighted SPL of 30?50 dB was perceived as annoying outdoors by about one third of respondents while indoors by one fifth of them. The proportions of the respondents annoyed by the wind turbine noise increased with increasing A-weighted sound pressure level. Subjects’ attitude to wind turbines in general and sensitivity to landscape littering was found to have significant impact on the perceived annoyance. Further studies are needed including a larger number of respondents before firm conclusions can be drawn.

2013-01-01T23:59:59.000Z

58

Simulating environmental changes due to marine hydrokinetic energy installations.  

SciTech Connect

Marine hydrokinetic (MHK) projects will extract energy from ocean currents and tides, thereby altering water velocities and currents in the site's waterway. These hydrodynamics changes can potentially affect the ecosystem, both near the MHK installation and in surrounding (i.e., far field) regions. In both marine and freshwater environments, devices will remove energy (momentum) from the system, potentially altering water quality and sediment dynamics. In estuaries, tidal ranges and residence times could change (either increasing or decreasing depending on system flow properties and where the effects are being measured). Effects will be proportional to the number and size of structures installed, with large MHK projects having the greatest potential effects and requiring the most in-depth analyses. This work implements modification to an existing flow, sediment dynamics, and water-quality code (SNL-EFDC) to qualify, quantify, and visualize the influence of MHK-device momentum/energy extraction at a representative site. New algorithms simulate changes to system fluid dynamics due to removal of momentum and reflect commensurate changes in turbulent kinetic energy and its dissipation rate. A generic model is developed to demonstrate corresponding changes to erosion, sediment dynamics, and water quality. Also, bed-slope effects on sediment erosion and bedload velocity are incorporated to better understand scour potential.

Jones, Craig A. (Sea Engineering Inc., Santa Cruz, CA); James, Scott Carlton; Roberts, Jesse Daniel (Sandia National Laboratories, Albuquerque, NM); Seetho, Eddy

2010-08-01T23:59:59.000Z

59

Deactivation Mechanism of Cu/Zeolite SCR Catalyst Due to Reductive...  

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

Mechanism of CuZeolite SCR Catalyst Due to Reductive Hydrothermal Aging Deactivation Mechanism of CuZeolite SCR Catalyst Due to Reductive Hydrothermal Aging Better control for...

60

E-Print Network 3.0 - air pollution due Sample Search Results  

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

due Search Powered by Explorit Topic List Advanced Search Sample search results for: air pollution due Page: << < 1 2 3 4 5 > >> 1 Air Quality: Reporting Requirements Department:...

Note: This page contains sample records for the topic "unscheduled downtime due" 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

Black Bear Prep plant replaces high-frequency screens with fine wire sieves  

SciTech Connect

At the Black Bear prep plant (near Wharncliffe, WV, USA) the clean coal from the spirals traditionally reported to high-frequency screens, which removed high-ash clay fines. Screens have inherent inefficiencies that allow clean coal to report to the screen underflow. The goal of this project was to capture the maximum amount of spiral clean coal while still removing the high-ash clay material found in the spiral product. The reduction of the circulating load and plant downtime for unscheduled maintenance were projected as additional benefits. After the plant upgrade, the maintenance related to the high frequency screens was eliminated and an additional 2.27 tons per hour (tph) of fine coal was recovered, which resulted in a payback period of less than one year. The article was adapted from a paper presented at Coal Prep 2007 in April 2007, Lexington, KY, USA. 1 ref., 1 fig., 1 tab.

Barbee, C.J.; Nottingham, J.

2007-12-15T23:59:59.000Z

62

Wind turbine reliability : understanding and minimizing wind turbine operation and maintenance costs.  

SciTech Connect

Wind turbine system reliability is a critical factor in the success of a wind energy project. Poor reliability directly affects both the project's revenue stream through increased operation and maintenance (O&M) costs and reduced availability to generate power due to turbine downtime. Indirectly, the acceptance of wind-generated power by the financial and developer communities as a viable enterprise is influenced by the risk associated with the capital equipment reliability; increased risk, or at least the perception of increased risk, is generally accompanied by increased financing fees or interest rates. Cost of energy (COE) is a key project evaluation metric, both in commercial applications and in the U.S. federal wind energy program. To reflect this commercial reality, the wind energy research community has adopted COE as a decision-making and technology evaluation metric. The COE metric accounts for the effects of reliability through levelized replacement cost and unscheduled maintenance cost parameters. However, unlike the other cost contributors, such as initial capital investment and scheduled maintenance and operating expenses, costs associated with component failures are necessarily speculative. They are based on assumptions about the reliability of components that in many cases have not been operated for a complete life cycle. Due to the logistical and practical difficulty of replacing major components in a wind turbine, unanticipated failures (especially serial failures) can have a large impact on the economics of a project. The uncertainty associated with long-term component reliability has direct bearing on the confidence level associated with COE projections. In addition, wind turbine technology is evolving. New materials and designs are being incorporated in contemporary wind turbines with the ultimate goal of reducing weight, controlling loads, and improving energy capture. While the goal of these innovations is reduction in the COE, there is a potential impact on reliability whenever new technologies are introduced. While some of these innovations may ultimately improve reliability, in the short term, the technology risks and the perception of risk will increase. The COE metric used by researchers to evaluate technologies does not address this issue. This paper outlines the issues relevant to wind turbine reliability for wind turbine power generation projects. The first sections describe the current state of the industry, identify the cost elements associated with wind farm O&M and availability and discuss the causes of uncertainty in estimating wind turbine component reliability. The latter sections discuss the means for reducing O&M costs and propose O&M related research and development efforts that could be pursued by the wind energy research community to reduce COE.

Not Available

2004-11-01T23:59:59.000Z

63

Comment on "Air Emissions Due to Wind and Solar Power" and Supporting Information  

E-Print Network (OSTI)

Due to Wind and Solar Power” Andrew Mills, ? , † RyanDue to Wind and Solar Power” Andrew Mills, ? , † Ryanthat wind and solar decrease NO x emissions. Andrew Mills et

Mills, Andrew D.

2011-01-01T23:59:59.000Z

64

Physics 116A Homework Set #2 Winter 2011 DUE: TUESDAY JANUARY 18, 2011  

E-Print Network (OSTI)

Physics 116A Homework Set #2 Winter 2011 DUE: TUESDAY JANUARY 18, 2011 Due to Martin Luther King as they are deposited in my physics department mailbox no later than 5 pm on Wednesday January 19. To receive full

California at Santa Cruz, University of

65

E-Print Network 3.0 - artificial fracture due Sample Search Results  

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

fracture due Search Powered by Explorit Topic List Advanced Search Sample search results for: artificial fracture due Page: << < 1 2 3 4 5 > >> 1 PROCEEDINGS, Thirty-Fifth Workshop...

66

Fact #588: September 14, 2009 Fuel Economy Changes Due to Ethanol...  

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

8: September 14, 2009 Fuel Economy Changes Due to Ethanol Content Fact 588: September 14, 2009 Fuel Economy Changes Due to Ethanol Content The fuel economy of a vehicle is...

67

Due credit  

Science Journals Connector (OSTI)

... Even the greatest scientific discoveries come with an element of the mundane. A humble paperclip was biophysicist Raymond Gosling’s choice. Late one night in May 1952, in ... in the rungs are key to the mechanism of inheritance. In the interview, a humble Gosling fondly recalls that Franklin’s response to Crick and Watson’s model of the ...

2013-04-17T23:59:59.000Z

68

Due Cut  

E-Print Network (OSTI)

of a few days' holiday in support of a friend? He could stay here in this delusion of solitude among landand trees and animals instead of hemmed in by tall buildings and cars and impa tient, hurried souls?Ray had obviously wanted him to stay... traction from his thoughts. Like his grandfather's old reel-to-reel, the phone call replayed itself in his mind, from the moment of shock when the constable had told him he had a phone call from Chicago?Ray had tracked him down? How?Why??to the moment...

Glasgow, M.F.

2002-01-01T23:59:59.000Z

69

Collective Doses and Radiation Risks Due to Medical Diagnostic Exposures in Ukraine  

Science Journals Connector (OSTI)

......Due to Medical Diagnostic Exposures in Ukraine L. Kalmykov N. Pilipenko V. Korneeva...Ukrainian population and separate regions of Ukraine due to radiodiagnosis have been calculated...exposure due to X ray examinations in Ukraine have decreased about twice during the......

L. Kalmykov; N. Pilipenko; V. Korneeva

1997-02-01T23:59:59.000Z

70

EPR Line Shifts and Line Shape Changes due to Spin Exchange of Nitroxide Free Radicals in Liquids: 6. Separating Line Broadening due to Spin Exchange and Dipolar Interactions  

E-Print Network (OSTI)

EPR Line Shifts and Line Shape Changes due to Spin Exchange of Nitroxide Free Radicals in Liquids 23, 2008; ReVised Manuscript ReceiVed: January 12, 2009 EPR spectra of perdeuterated 2

Bales, Barney

71

Vehicle Technologies Office: Fact #668: March 28, 2011 Time Wasted Due to  

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

8: March 28, 8: March 28, 2011 Time Wasted Due to Traffic Congestion to someone by E-mail Share Vehicle Technologies Office: Fact #668: March 28, 2011 Time Wasted Due to Traffic Congestion on Facebook Tweet about Vehicle Technologies Office: Fact #668: March 28, 2011 Time Wasted Due to Traffic Congestion on Twitter Bookmark Vehicle Technologies Office: Fact #668: March 28, 2011 Time Wasted Due to Traffic Congestion on Google Bookmark Vehicle Technologies Office: Fact #668: March 28, 2011 Time Wasted Due to Traffic Congestion on Delicious Rank Vehicle Technologies Office: Fact #668: March 28, 2011 Time Wasted Due to Traffic Congestion on Digg Find More places to share Vehicle Technologies Office: Fact #668: March 28, 2011 Time Wasted Due to Traffic Congestion on AddThis.com...

72

PerformanceMetricsFY13  

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

Pencil Beam") Pencil Beam") Experiment: E-211 CERN BBA Date: 3/11/2013 Time beam delivered (hours): 14.2 Time Promised (hours): 12 Unscheduled accelerator downtime (hours): 1.8 User off (hours): 0 Total Time (delivered+downtime+user off, hours): 16 Charge (electrons/bunch) S2 S10 S19 S20 SCAV Delivered: 1.02e10 1.06e10 1.05e10 8.5e9 9.5e9 Requested: 1e10 1e10 1e10 Not in request Not in request Normalized emittance (mm mrad) S2 (x,y) S4 (x,y) S11 (x,y) S18 (x,y) S20 (x,y) Delivered: 34, 2.7 25, 3.2 40, 6.4 42, 20 Requested: Not in request Not in request Not in request Not in request Not in request Bunch length delivered (rms, microns): 420 Bunch length requested (microns): Not in request

73

PerformanceMetricsFY14  

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

Over-compressed, High Charge") Over-compressed, High Charge") Experiment: E-201 DIELECTRIC WAKEFIELD ACCELERATION Date: 10/28/2013 Time beam delivered (hours): 2 Time Promised (hours): 2 Unscheduled accelerator downtime (hours): 0 User off (hours): 0 Total Time (delivered+downtime+user off, hours): 2 Charge (electrons/bunch) S2 S10 S19 S20 SCAV Delivered: 2.0e10 2.1e10 2.1e10 1.6e10 2.1e10 Requested: 2e10 2e10 2e10 2e10 Not in request Normalized emittance (mm mrad) S2 (x,y) S4 (x,y) S11 (x,y) S18 (x,y) S20 (x,y) Delivered: 40,2.3 34,2.1 54,4.8 67,8.4 Unmeasured Requested: Not in request Not in request Not in request Not in request Not in request Bunch length delivered (rms, microns): Unmeasured Bunch length requested (microns): Not in request

74

Materiel availability modeling and analysis for a complex army weapon system.  

SciTech Connect

Materiel availability (A{sub m}) is a new US Department of Defense Key Performance Parameter (KPP) implemented through a mandatory Sustainment Metric consisting of an Availability KPP and two supporting Key System Attributes (KSAs), materiel reliability and ownership cost. Sandia National Laboratories (Sandia), in conjunction with several US Army organizations, developed the analytical foundation, assumptions, and brigade-level modeling approach to support lifecycle, fleet-wide A{sub m} modeling and analysis of a complex Army weapon system. Like operational availability (A{sub o}), A{sub m} is dependent on reliability, but A{sub m} is also affected by other factors that do not impact A{sub o}. The largest influences on A{sub m} are technology insertion and reset downtimes. A{sub m} is a different metric from A{sub o}. Whereas A{sub o} is an operational measure, A{sub m} is more of a programmatic measure that spans a much larger timeframe, additional sources of downtime, and additional sources of unscheduled maintenance.

Gunther, David W. (US Army); Anderson, Dennis James; Martin, Jeffrey A. (US Army); Hoffman, Matthew J.

2010-10-01T23:59:59.000Z

75

Wireless Sensor Network for Advanced Energy Management Solutions  

SciTech Connect

Eaton has developed an advanced energy management solution that has been deployed to several Industries of the Future (IoF) sites. This demonstrated energy savings and reduced unscheduled downtime through an improved means for performing predictive diagnostics and energy efficiency estimation. Eaton has developed a suite of online, continuous, and inferential algorithms that utilize motor current signature analysis (MCSA) and motor power signature analysis (MPSA) techniques to detect and predict the health condition and energy usage condition of motors and their connect loads. Eaton has also developed a hardware and software platform that provided a means to develop and test these advanced algorithms in the field. Results from lab validation and field trials have demonstrated that the developed advanced algorithms are able to detect motor and load inefficiency and performance degradation. Eaton investigated the performance of Wireless Sensor Networks (WSN) within various industrial facilities to understand concerns about topology and environmental conditions that have precluded broad adoption by the industry to date. A Wireless Link Assessment System (WLAS), was used to validate wireless performance under a variety of conditions. Results demonstrated that wireless networks can provide adequate performance in most facilities when properly specified and deployed. Customers from various IoF expressed interest in applying wireless more broadly for selected applications, but continue to prefer utilizing existing, wired field bus networks for most sensor based applications that will tie into their existing Computerized Motor Maintenance Systems (CMMS). As a result, wireless technology was de-emphasized within the project, and a greater focus placed on energy efficiency/predictive diagnostics. Commercially available wireless networks were only utilized in field test sites to facilitate collection of motor wellness information, and no wireless sensor network products were developed under this project. As an outgrowth of this program, Eaton developed a patented energy-optimizing drive control technology that is complementary to a traditional variable frequency drives (VFD) to enable significant energy savings for motors with variable torque applications, such as fans, pumps, and compressors. This technology provides an estimated energy saving of 2%-10% depending on the loading condition, in addition to the savings obtained from a traditional VFD. The combination of a VFD with the enhanced energy-optimizing controls will provide significant energy savings (10% to 70% depending on the load and duty cycle) for motors that are presently connected with across the line starters. It will also provide a more favorable return on investment (ROI), thus encouraging industries to adopt VFDs for more motors within their facilities. The patented technology is based on nonintrusive algorithms that estimate the instantaneous operating efficiency and motor speed and provide active energy-optimizing control of a motor, using only existing voltage and current sensors. This technology is currently being commercialized by Eaton’s Industrial Controls Division in their next generation motor control products. Due to the common nonintrusive and inferential nature of various algorithms, this same product can also include motor and equipment condition monitoring features, providing the facility owner additional information to improve process uptime and the associated energy savings. Calculations estimated potential energy savings of 261,397GWh/Yr ($15.7B/yr), through retrofitting energy-optimizing VFDs into existing facilities, and incorporating the solution into building equipment sold by original equipment manufacturers (OEMs) and installed by mechanical and electrical contractors. Utilizing MCSA and MPSA for predictive maintenance (PM) of motors and connected equipment reduces process downtime cost and the cost of wasted energy associated with shutting down and restarting the processes. Estimated savings vary depending on the industry segment and equi

Peter J. Theisen; Bin Lu, Charles J. Luebke

2009-09-23T23:59:59.000Z

76

Seismic bridge response modification due to degradation of viscous dampers performance  

E-Print Network (OSTI)

Monitoring of Isolated Bridges: Parametric Analysis of theidentification procedure for bridge structures with energyUCSD. Cendron. (2008). Bridge response modification due to

Graziotti, Francesco

2010-01-01T23:59:59.000Z

77

E-Print Network 3.0 - acute pharyngitis due Sample Search Results  

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

of 1-alkyl-3-methylimidazolium chloride based ionic liquids Summary: attention as new solvents within the green chemistry community.1 This attention is due in part... - mental...

78

Quantifying Area Changes of Internationally Important Wetlands Due to Water Consumption in LCA  

Science Journals Connector (OSTI)

Quantifying Area Changes of Internationally Important Wetlands Due to Water Consumption in LCA ... This paper presents the inclusion of new, relevant impact categories for agriculture life cycle assessments. ...

Francesca Verones; Stephan Pfister; Stefanie Hellweg

2013-08-09T23:59:59.000Z

79

Rotational Doppler-effect due to selective excitation of vector-vortex field in optical fiber  

Science Journals Connector (OSTI)

Experimental demonstration of rotational Doppler-effect due to direct and simultaneous excitation of orthogonal elliptically-polarized fundamental and vortex modes in a two-mode...

Inavalli, V V G Krishna; Viswanathan, Nirmal K

2011-01-01T23:59:59.000Z

80

E-Print Network 3.0 - amelogenesis imperfecta due Sample Search...  

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

Materials Science ; Biotechnology 58 Combining High-resolution Micro computed Tomography with Material Summary: in assessing bone volumetric density is severely limited due...

Note: This page contains sample records for the topic "unscheduled downtime due" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Free Energy Shift of Condition Electrons Due to the s-d Exchange Interaction  

Science Journals Connector (OSTI)

......1969 research-article Articles Free Energy Shift of Condition Electrons Due...University, Toyonaka, Osaka The free energy shift of the s-d system is recalculated...Vol. 41, No.6, June 1969 Free Energy Shift of Conduction Electrons Due......

Kei Yosida; Hirosi Miwa

1969-06-01T23:59:59.000Z

82

Online Pipeline Transportation of Petroleum Products with no Due Dates 1  

E-Print Network (OSTI)

On­line Pipeline Transportation of Petroleum Products with no Due Dates 1 Ruy Luiz Milidi'u milidiu, 2001 Abstract: In this paper, we introduce a new model for pipeline transportation of petroleum products without due dates. We use a directed multigraph G where arcs represent pipes and nodes represent

Endler, Markus

83

METR 2603.001, Spring 2013, Dr. LaDue Syllabus, Spring 2013, p. 1  

E-Print Network (OSTI)

Syllabus -- Spring 2013 Class Schedule: MWF 9:30­10:20am, Carson Engineering Rm 117METR 2603.001, Spring 2013, Dr. LaDue Syllabus, Spring 2013, p. 1 course. #12;METR 2603.001, Spring 2013, Dr. LaDue Syllabus, Spring 2013

Droegemeier, Kelvin K.

84

Policy Name: Closing due to Indoor Temperature Extremes Originating/Responsible Department: Facilities Management and Planning  

E-Print Network (OSTI)

Policy Name: Closing due to Indoor Temperature Extremes Originating/Responsible Department to be followed in the event that indoor temperature extremes prompt the closing of any building or work area. The closing of any building or work area due to indoor temperatures extremes shall be subject to operational

Dawson, Jeff W.

85

Depression of Protein Synthetic Capacity Due to Cloned-Gene Expression in E. coli  

E-Print Network (OSTI)

Depression of Protein Synthetic Capacity Due to Cloned-Gene Expression in E. coli Thomas K. Wood using pulse-labelling and RNA-DNA hybridiza- tions. Specifically, the steady-state level, synthesis rate

Wood, Thomas K.

86

Development of a research methodology to study lumber waste due to design causes in residential construction  

E-Print Network (OSTI)

Residential Construction faces problems regarding inefficiencies of material usage. Builders pay twice for the lumber that is wasted. Once when it is purchased and once when it is disposed. Part of the lumber waste is generated due to the design...

Vyas, Ashok Madhusudan

2012-06-07T23:59:59.000Z

87

Roughening due to edge diffusion for irreversible aggregation C. Ratsch,1,2,  

E-Print Network (OSTI)

Roughening due to edge diffusion for irreversible aggregation C. Ratsch,1,2, * M. C. Wheeler,2 for epitaxial growth enhances surface roughening for a model of irreversible aggregation. The reason

Ratsch, Christian

88

Interannual Variations in PM2.5 due to Wildfires in the Western United States  

Science Journals Connector (OSTI)

Interannual Variations in PM2.5 due to Wildfires in the Western United States ... For example Craters of the Moon (CRMO1) and Bridger Wilderness (BRID1) show numerous significant correlations with sites in Colorado. ...

Dan Jaffe; William Hafner; Duli Chand; Anthony Westerling; Dominick Spracklen

2008-03-13T23:59:59.000Z

89

Research Advisor Agreement (Due March 1, 2014) School of Engineering and Applied Sciences  

E-Print Network (OSTI)

Research Advisor Agreement (Due March 1, 2014) School of Engineering and Applied Sciences Student Name: Last First Middle HUID Research Advisor to activate your RA pay. Research Advisor Role: The research advisor is expected to chair the qualifying

Chen, Yiling

90

Characterization of unsteady loading due to impeller-diffuser interaction in centrifugal compressors  

E-Print Network (OSTI)

Time dependent simulations are used to characterize the unsteady impeller blade loading due to imipeller-diffuser interaction in centrifugal compressor stages. The capability of simulations are assessed by comparing results ...

Lusardi, Christopher (Christopher Dean)

2012-01-01T23:59:59.000Z

91

Power Management for Alleviation of the Impact on PEM Fuel Cell due to Load Fluctuation  

Science Journals Connector (OSTI)

Transient impact on fuel cell system due to stack current fluctuation sometimes causes severe degradation of some performances such as voltage variation, oxygen starvation, anode/cathode pressure disturbance, membrane dryout and voltage reversal. As ...

Guidong Liu; Wensheng Yu; Zhishou Tu

2006-10-01T23:59:59.000Z

92

E-Print Network 3.0 - atmospheric electrons due Sample Search...  

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

at polar latitudes (Spitsbergen... . J.: Some effects in the middle atmosphere due to lightning, J. Atmos. Terr. Phys., 56, 343-348, 1994... ACPD 6, 6613-6626, 2006 Spectral...

93

E-Print Network 3.0 - aqueduct stenosis due Sample Search Results  

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

Mexico J. Medellin-Azuara a,*, L.G. Mendoza-Espinosa b Summary: aqueduct or wastewater reuse. If seawater desalination costs decrease due to longer lasting membranes... of this...

94

On climatic changes due to a deliberate flooding of the Qattara depression (Egypt)  

Science Journals Connector (OSTI)

A numerical mesoscale model has been applied to make a preliminary evaluation of the mesoscale climatic changes due to a deliberate flooding of the Qattara depression in Egypt. Simulation of a typical summer syno...

M. Segal; R. A. Pielke; Y. Mahrer

1990-12-01T23:59:59.000Z

95

On climatic changes due to a deliberate flooding of the Qattara depression (Egypt)  

Science Journals Connector (OSTI)

A numerical mesoscale model has been applied to make a preliminary evaluation of the mesoscale climatic changes due to a deliberate flooding of the Qattara depression in Egypt. Simulation of a typical summer syno...

M. Segal; R. A. Pielke; Y. Mahrer

1983-01-01T23:59:59.000Z

96

E-Print Network 3.0 - aquatic biota due Sample Search Results  

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

aquatic biota due Page: << < 1 2 3 4 5 > >> 1 COMBINED ECOLOGICAL RISK ASSESSMENT OF SEDIMENT AND WATER COLUMN CONTAMINATED BY DIFFUSE POLLUTION Summary: by the authors to assess...

97

Estimation of the Radiation Dose to the Public Due to Atmospheric Emissions from the Rostov NPP  

Science Journals Connector (OSTI)

The radiation dose to the public due to atmospheric emissions from the Rostov NPP is calculated using a point conservative approach and a complex of migration and dosimetric models. The radiation exposure path...

L. A. Sharpan; E. I. Karpenko; S. I. Spiridonov

2014-01-01T23:59:59.000Z

98

Changes in Silicone Polymeric Fluids due to High-Energy Radiation  

Science Journals Connector (OSTI)

...Fluids due to High-Energy Radiation A. Charlesby When subjected to high-energy radiation, polydimethyl...confirmed by elastic measurements. Unit pile radiation is found...cross-linking. The energy per cross-link is about...

1955-01-01T23:59:59.000Z

99

Measurement of distributed strain due to laying and recovery of submarine optical fiber cable  

Science Journals Connector (OSTI)

Strain distribution due to cable laying and recovery is measured, using Brillouin optical fiber time domain analysis in a 3.7-km long submarine optical fiber cable. We believe this is...

Kurashima, Toshio; Horiguchi, Tsuneo; Yoshizawa, Nobuyuki; Tada, Hidenobu; Tateda, Mitsuhiro

1991-01-01T23:59:59.000Z

100

Scour about a cylindrical pile due to steady and oscillatory motion  

E-Print Network (OSTI)

SCOUR ABOUT A CYLINDRICAL PILE DUE TO STEADY AND OSCILLATORY MOTION A Thesis by SCDTT FRANKLYN ARMBRUST Subm'itted to the Graduate College of Texas AtLM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... May 1982 Major Subject: Ocean Engineering SCOUR ABOUT A CYLINDRICAL PILE DUE TO STEADY AND OSCILLATORY MOTION A Thesis by SCOTT FRANICLYN ARMBRUST Approved as to style and content by: Chairman of Committee Head of Department) Member ember...

Armbrust, Scott Franklyn

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "unscheduled downtime due" 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

The assessment of mixing/solid suspension in a slab tank due to vibratory agitation  

E-Print Network (OSTI)

THE ASSESSMENT OF MIXING/SOLID SUSPENSION IN A SLAB TANK DUE TO VIBRATORY AGITATION A Thesis by CHRISTOPHER JOSEPH RAMSEY Submitted to the Graduate College of Texas AkM University in partial fulfillment of the requirement for the degree... of MASTER OF SCIENCE August 1988 Major Subject: Mechanical Engineering THE ASSESSMENT OF MIXING/SOLID SUSPENSION IN A SLAB TANK DUE TO VIBRATORY AGITATION A Thesis by CHRISTOPHER JOSEPH RAMSEY Approved as to style and content by: Gar B. Tatterson...

Ramsey, Christopher Joseph

1988-01-01T23:59:59.000Z

102

A conceptual model for determining yield loss due to drought stress in sorghum  

E-Print Network (OSTI)

A CONCEPTUAL MODEL FOR DETERMINING YIELD LOSS DUE TO DROUGHT STRESS IN SORGHUM A Thesis by PAUL ROBERT KOCH Submitted to the Graduate College of Texas AkM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1987 Major Subject: Agricultural Engineering A CONCEPTUAL MODEL FOR DETERMINING YIELD LOSS DUE TO DROUGHT STRESS IN SORGHUM A thesis by PAUL ROBERT KOCH Approved as to style and content by: Marshall J. McFarland (Chair of Committee...

Koch, Paul Robert

2012-06-07T23:59:59.000Z

103

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

E-Print Network (OSTI)

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

Larm, Katherine, Dd 1970-

1998-01-01T23:59:59.000Z

104

Transport of entrained air bubbles in fresh concrete due to pressure variations  

E-Print Network (OSTI)

is beneficial. Bubbles are stabilized against mechanical deformation and rupture by means of the so called "Marangoni" effect due to the adsorbed films and the consequent lowering of surface tension. "This effect is to restore a locally deformed bubble... . . . . . . . . . . . . . . . , . . . . . . , . . . . . . . 185 LIST OF TABLES Table 1. Page Air Pressure in Bubbles Due to Surface Tension Only [9]. . . . . . . . . , . . . . . . . . . . . . . . . 66 Table 2. Estimation of Air Loss by Dissolution. Table 3. Design Factorial Test Conditions. 83 Table 4...

Macha, Ravi Kumar

2012-06-07T23:59:59.000Z

105

Tune modulation due to synchrotron oscillations and chromaticity, and the dynamic aperture  

SciTech Connect

A tracking study was done of the effects of a tune modulations, due to synchrotron oscillations and the tune dependence on momentum (chromaticity), on the dynamic aperture. The studies were done using several RHIC lattices and tracking runs of about 1 {times} 10{sup 6} turns. The dynamic aperture was found to decrease roughly linearly with the amplitude of the tune modulation. Lower order non-linear resonances, like the 1/3 and 1/4 resonance are not crossed because of the tune modulation. Three different cases were studied, corresponding to RHIC lattices with different {beta}*, and with different synchrotron oscillation amplitudes. In each case, the tune modulation amplitude was varied by changing the chromaticity. In each case, roughly the same result, was found. The result found here for the effect of a tune modulation due to chromaticity may be compared with the result found for the effect of a tune modulation due to a gradient ripple in the quadrupoles. The effect of a tune modulation due to a gradient ripple appears to be about 4 times stronger than the effect of a tune modulation due to chromaticity and synchrotron oscillations.

Parzen, G.

1995-05-01T23:59:59.000Z

106

Hanford to Host ISMS Safety Workshop in Kennewick: Abstracts Due in June  

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

Hanford to Host ISMS Safety Workshop in Kennewick: Abstracts Due in Hanford to Host ISMS Safety Workshop in Kennewick: Abstracts Due in June for September Event Hanford to Host ISMS Safety Workshop in Kennewick: Abstracts Due in June for September Event May 18, 2011 - 12:00pm Addthis Media Contact Cameron Hardy, DOE (509) 376-5365 Cameron.Hardy@rl.doe.gov RICHLAND, WASH. - The U.S. Department of Energy (DOE) at Hanford will hold its annual DOE Integrated Safety Management (ISM) Champions Workshop on September 12-15, 2011, at the Three Rivers Convention Center in Kennewick, Wash. DOE's Richland Operations Office and Office of River Protection are hosting this year's event. The purpose of the workshop is to promote a robust safety culture and educate attendees on safety developments and environmental compliance methods for effective implementation of the

107

Low Dose Radiation Research Program: The Risk of Cancer Induction Due to  

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

November 10-12, 1999, Washington, D.C. November 10-12, 1999, Washington, D.C. The Risk of Cancer Induction Due to Routine Mammographic Screening Featured Project Description David J. Brenner, Steve Marino, and Charles Geard, Center for Radiological Research, Columbia University, 630 West 168th Street, New York Summary: To obtain realistic and credible risk estimates for breast-cancer mortality due to clinical mammographic imaging examinations. Abstract: The aim of this work is to obtain realistic and credible risk estimates for breast-cancer mortality due to clinical mammographic imaging examinations. Given the increasing emphasis on clinical mammographic screening for breast cancer, it is of societal importance to provide realistic risk estimates with realistic confidence bounds for breast cancer

108

Scour around a group of piles due to oscillatory wave motion  

E-Print Network (OSTI)

SCOUR AROUND A GROUP OF PILES DUE TO OSCILLATORY WAVE MOTION A The is by WEI-YIH CHOW Submitted to the Graduate College of Texas A6M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE May 1977 Major... Subject: Civil Engineering SCOUR AROUND A GROUP OF PILES DUE 0 OSCILLATORY NAVE MOTION A Thesis by WEI-YIH CHOW Approved as to style and content by: e ( z. rman of Commj. ttee) &Head of Departmen Me er Membe May 1977 441626 ABSTRACT Scour...

Chow, Wei-Yih

2012-06-07T23:59:59.000Z

109

The distortion of a uniform flow field due to a finite flat plate  

E-Print Network (OSTI)

THE DISTORTION OI' A UNIFORM FLON FIELD DUE TO A FINITE FLAT PLATE A Thesis Lawrence Michael Zull Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE May... 1970 Major Subject: Mechanical F~nin~eerin THE DISTORTION OF A UNIFORM FLOV FIELD DUE TO A FINITE FLAT PLATE A Thesis by Lawrence Michael Zull Approved as to style and content by: (Ch (Head of De artment) (Member) (Member) ~Ma 19 70 AB...

Zull, Lawrence Michael

2012-06-07T23:59:59.000Z

110

Collisionless damping of nonlinear dust ion acoustic wave due to dust charge fluctuation  

Science Journals Connector (OSTI)

A dissipation mechanism for the damping of the nonlinear dust ion acoustic wave in a collisionless dusty plasma consisting of nonthermal electrons, ions, and variable charge dust grains has been investigated. It is shown that the collisionless damping due to dust charge fluctuation causes the nonlinear dust ion acoustic wave propagation to be described by the damped Korteweg-de Vries equation. Due to the presence of nonthermal electrons, the dust ion acoustic wave admits both positive and negative potential and it suffers less damping than the dust acoustic wave, which admits only negative potential.

Samiran Ghosh; Tushar K. Chaudhuri; Susmita Sarkar; Manoranjan Khan; M. R. Gupta

2002-03-21T23:59:59.000Z

111

Model study of shoreline changes due to a series of offshore breakwaters  

E-Print Network (OSTI)

MODEL STUDY OF SHORELINE CHANGES DUE TO A SERIES OF OFFSHORE BREAKHATERS A Thesis by DONALD ALAN CORDS Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... May 1986 Hajor Subject: Ocean Engineering NODEL STUDY OF SHORELINE CHANGES DUE TD A SERIES OF OFFSHORE BREAKHATERS A Thesis by DONALD ALAN CORDS Approved as to style and content by: ohn . er sc (Chairman) o ert . a a (Nember ) o er . ei...

Cords, Donald Alan

2012-06-07T23:59:59.000Z

112

Metabolic transformation of microalgae due to light acclimation and genetic modifications  

E-Print Network (OSTI)

Metabolic transformation of microalgae due to light acclimation and genetic modifications followed is distinguished with a high level of plasticity, where environ- mental conditions, e.g., nitrogen starvation, can modications can be used for metabolic engineering to achieve, e.g., increased lipid production.8

Vertes, Akos

113

Statistical Estimation of Circuit Timing Vulnerability Due to Leakage-Induced Power Grid Voltage Drop  

E-Print Network (OSTI)

Statistical Estimation of Circuit Timing Vulnerability Due to Leakage-Induced Power Grid Voltage voltage drops on the power grid that can affect circuit timing. We propose a statistical analysis supply voltage to circuit devices is referred to as the power grid. The consequences of power grid

Najm, Farid N.

114

Object Oriented Assessment Of Damage Due To Natural Disaster Using Very High Resolution  

E-Print Network (OSTI)

Object Oriented Assessment Of Damage Due To Natural Disaster Using Very High Resolution Images Anne.wald@ensmp.fr Abstract--A building damage assessment method applied to the case of the earthquake of Bam is proposed assessment is proposed. It allows a classification performance of the buildings among four damage grades up

Paris-Sud XI, Université de

115

Clinical Trial Closeout Checklist and Certification (Due 90 days after end of project)  

E-Print Network (OSTI)

personnel related expenses been charged to the project according to university policies and procedures? 3Clinical Trial Closeout Checklist and Certification (Due 90 days after end of project) Project No. Has an audit been performed on all medical services to insure that all study procedures have been

116

Dances with waves Air-sea interaction The generation and growth of waves due to  

E-Print Network (OSTI)

and the atmosphere fuels to a large extent the atmospheric and oceanic circulation. The release of water vapourDances with waves Air-sea interaction · The generation and growth of waves due to wind blowing over water, is a well-known example of air-sea interaction. Momentum transported downwards from the air

Haak, Hein

117

Detectability of Radio Frequency Interference due to Spread Spectrum Communication Signals using the  

E-Print Network (OSTI)

Detectability of Radio Frequency Interference due to Spread Spectrum Communication Signals using-- Analysis of detectability of the kurtosis algorithm for pulsed-sinusoidal Radio Frequency Interference (RFI) has already been performed in detail. The detectability for wide- band spread-spectrum RFI

Ruf, Christopher

118

High-Molecular-Weight Polyethylene Glycol Prevents Lethal Sepsis Due to Intestinal Pseudomonas aeruginosa  

E-Print Network (OSTI)

High-Molecular-Weight Polyethylene Glycol Prevents Lethal Sepsis Due to Intestinal Pseudomonas of this study were to test the ability of a high-molecular- weight polyethylene glycol compound, polyethylene: The ability of polyethylene glycol 15­20 to protect the intestinal epi- thelium against the opportunistic

Lee, Ka Yee C.

119

Directions and Map Please note: Due to major construction for the Central  

E-Print Network (OSTI)

the north: Take the University Avenue/4th Street exit. Turn left at the second set of lights, UniversityDirections and Map Please note: Due to major construction for the Central Corridor light rail the Huron Boulevard exit. Turn left on Fulton Street S.E. Follow Fulton Street for approximately 5 blocks

Weinberger, Hans

120

Acoustic attenuation due to transformation twins in CaCl2: Analogue behaviour for stishovite  

E-Print Network (OSTI)

Acoustic attenuation due to transformation twins in CaCl2: Analogue behaviour for stishovite: Pseudoproper ferroelastic phase transition Ferroelastic twin walls Stishovite CaCl2 Acoustic attenuation a b s t r a c t CaCl2 undergoes a tetragonal (P42/mnm) to orthorhombic (Pnnm) transition as a function

Cambridge, University of

Note: This page contains sample records for the topic "unscheduled downtime due" 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

2/8/2007 Holger Schlarb, DESY Limitation due to new  

E-Print Network (OSTI)

2/8/2007 Holger Schlarb, DESY Limitation due to new chicane BPM in BC3 Holger Schlarb, Kirsten #12;2/8/2007 Holger Schlarb, DESY BC3 currently Old Button BPM Vacuum Chamber For pumping Spare chamber #12;2/8/2007 Holger Schlarb, DESY BPM layout · bunch compressor BC3 between D2 & D3 Beam BC3

122

Radiative forcing due to changes in ozone and methane caused by the transport sector  

E-Print Network (OSTI)

., 2008). This switch for SHIP is partly due to the strong direct and indirect aerosol effect from SHIP in revised form 27 September 2010 Accepted 4 October 2010 Keywords: Radiative forcing GWP GTP Shipping SHIPping and AIRcraft) are calculated using results from five global atmospheric chemistry models. Using

Haak, Hein

123

TRANSIENT CURRENTSAM) VOLTAGES IN A POWER DISTRIBUTION SYSTEM DUE TO NATURAL LIGHTNING  

E-Print Network (OSTI)

July 1995, a lightning flash struck earth tens of meters away from the test system's conductors. On 11 of the test distribution system at ICLRT for the lightning flashes analyzed are given in Figs. 1 and 2TRANSIENT CURRENTSAM) VOLTAGES IN A POWER DISTRIBUTION SYSTEM DUE TO NATURAL LIGHTNING M

Florida, University of

124

Deformation of a liquid surface due to an impinging gas jet: A conformal mapping approach  

E-Print Network (OSTI)

on it. The problem of a gas jet impinging on a liquid surface arises in several important industrialDeformation of a liquid surface due to an impinging gas jet: A conformal mapping approach Andong He to convert it to steel known as the basic oxygen conversion process1 . In the arc welding process, a high

125

Eects of convection instability due to incompatibility between ocean dynamics and surface forcings  

E-Print Network (OSTI)

- bility between a surface temperature climatology and a given ocean model, into which the climatology by thermal and wind forcing only. Initially, the temperature climatology is forcefully assimilated climatology. In areas characterized by sharp oceanic fronts and high convective activity, the OGCM, due

Paris-Sud XI, Université de

126

Physics 216 Problem Set 2 Spring 2012 DUE: THURSDAY, APRIL 26, 2012  

E-Print Network (OSTI)

Physics 216 Problem Set 2 Spring 2012 DUE: THURSDAY, APRIL 26, 2012 1. You are the creator the problem exactly. (A table of zeros of Airy functions and other useful facts can be found in Handbook of Mathematical Functions, by Abramowitz and Stegun.) How well does the WKB approximation do? (b) Using mc = m

California at Santa Cruz, University of

127

Abrupt climate shifts in Greenland due to displacements of the sea ice edge  

E-Print Network (OSTI)

by insulating the atmosphere from the substantial heat capacity of the ocean. When sea ice is absent, the oceanAbrupt climate shifts in Greenland due to displacements of the sea ice edge Camille Li,1 David S that a reduction in sea ice extent in the North Atlantic produces a climatic response consistent with abrupt

Schrag, Daniel

128

Field monitoring and modeling of pavement response and service life consumption due to overweight truck traffic  

E-Print Network (OSTI)

A number of pavement structures experience deterioration due to high traffic volume and growing weights. Recently, the Texas Legislatures passed bills allowing trucks of gross vehicle weight (GVW) up to 556 kN routinely to use a route in south Texas...

Oh, Jeong-Ho

2004-11-15T23:59:59.000Z

129

Permeability changes due to mineral diagenesis in fractured crust: implications for hydrothermal circulation at  

E-Print Network (OSTI)

The hydrothermal processes at ridge crests have been extensively studied during the last two decades. NeverthelessPermeability changes due to mineral diagenesis in fractured crust: implications for hydrothermal, the reasons why hydrothermal fields are only occasionally found along some ridge segments remain a matter

Manga, Michael

130

Estimation of uncertainties due to the wind-induced noise in a screened microphone  

E-Print Network (OSTI)

for experimental assessment of wind turbine noise. The contribution of the wind noise introduces a biasEstimation of uncertainties due to the wind-induced noise in a screened microphone D. Ecotiere by the wind at a screened microphone. This noise originates from turbulences that come from the direct

Paris-Sud XI, Université de

131

Changes in Soil Quality Due to Grazing and Oak Tree Removal in California Blue Oak  

E-Print Network (OSTI)

investigated (carbon, nitrogen, phosphorus, pH) within 5 to 15 years following tree removal. Following treeChanges in Soil Quality Due to Grazing and Oak Tree Removal in California Blue Oak Woodlands1 Trina of grazing and oak tree removal on soil quality and fertility were examined in a blue oak (Quercus douglasii

Standiford, Richard B.

132

Formulating an Optimization Problem for Minimization of Losses due to Utilities  

E-Print Network (OSTI)

Formulating an Optimization Problem for Minimization of Losses due to Utilities Anna Lindholm.lindholm@control.lth.se). Abstract: Utilities, such as steam and cooling water, are often shared between several production areas at industrial sites, and the effects of disturbances in utilities could thus be hard to predict. In addition

Como, Giacomo

133

Spatial variability of sea level rise due to water impoundment behind dams  

E-Print Network (OSTI)

Click Here for Full Article Spatial variability of sea level rise due to water impoundment behind global sea level by 30.0 mm and decreasing the rate of sea level rise. The load from impounded water change on sea level rise sources, which include thermal expansion of seawater and the melting of glaciers

Conrad, Clint

134

Coastal Inundation due to Tide, Surge, Waves, and Sea Level Rise at Naval Station Norfolk  

E-Print Network (OSTI)

Coastal Inundation due to Tide, Surge, Waves, and Sea Level Rise at Naval Station Norfolk Honghai of future sea level rise (SLR) scenarios and to evaluate the potential coastal inundation at Naval Station and sea level rise threats to coastal residents and coastal military facilities, the US Strategic

US Army Corps of Engineers

135

Disclosures due to Health Care Reform Changes Disclosure of Grandfather Status  

E-Print Network (OSTI)

Disclosures due to Health Care Reform Changes Disclosure of Grandfather Status UCSD Medical Center of the Affordable Care Act that apply to other plans. Grandfathered health plans must comply with certain other believes this health plan coverage is a "grandfathered health plan" under the Patient Protection

Gleeson, Joseph G.

136

Investigation of a Fatality Due to Diesel Fuel No. 2 Ingestion  

Science Journals Connector (OSTI)

......removal and maintenance of underground storage tanks (12). Inhalation ofdiesel oil...thus there is less risk of loss due to storage or handling during extraction. In addi...Acute renal failure after immersion in seawater polluted by diesel oil. Am. J. Kidney......

María A. Martínez; Salomé Ballesteros

2006-10-01T23:59:59.000Z

137

Cellulose nanowhiskers (CNW) have attracted much attention over the past several years due to their  

E-Print Network (OSTI)

Cellulose nanowhiskers (CNW) have attracted much attention over the past several years due- hydroxybutyrate-hydroxyvalerate). Cellulose nanowhiskers were prepared from microcrystilline cellulose (MCC) using and spun into fibers using a spinneret of diameter 370 m and an ethanol coagulation bath. The fibers were

Collins, Gary S.

138

Magnetic Order in Kondo-Lattice Systems due to Electron-Electron Interactions  

E-Print Network (OSTI)

source of decoherence of electron spin qubits is the hyperfine coupling of the electron spin the electron spin and lead to the decoherence. This decoherence source can be largely suppressed whenMagnetic Order in Kondo-Lattice Systems due to Electron-Electron Interactions Bernd Braunecker

Braunecker, Bernd

139

Seismic hazard due to small-magnitude, shallow-source, induced earthquakes in The Netherlands  

E-Print Network (OSTI)

Seismic hazard due to small-magnitude, shallow-source, induced earthquakes in The Netherlands Torild van Eck*, Femke Goutbeek, Hein Haak, Bernard Dost Seismology Division, Royal Netherlands Meteorological Institute (KNMI) PO Box 201, 3730 AE De Bilt, The Netherlands. E-mail: vaneck@knmi.nl Revised

Haak, Hein

140

Philosophy 101 --Five Extra-Credit Problems 04/28/11 (due 5/12/11)  

E-Print Network (OSTI)

Philosophy 101 -- Five Extra-Credit Problems 04/28/11 (due 5/12/11) Here are ve passages of these) is (roughly) equal to one homework assignment. [Note: the last two of these extra-credit problems President Bush (senior) condemn abortion except in those instances when pregnancies have resulted from rape

Fitelson, Branden

Note: This page contains sample records for the topic "unscheduled downtime due" 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

Short Communication Possible long-range step interaction in 4He due to step oscillation  

E-Print Network (OSTI)

here. A step is regarded as an oscillating string which moves freely on a flat singular face2743 Short Communication Possible long-range step interaction in 4He due to step oscillation M oscillation. We calculate contribution of the step oscillation to the surface free energy at high temperatures

Paris-Sud XI, Université de

142

Influence of Location, Population, and Climate on Building Damage and Fatalities due to Australian Bushfire: 19252009  

E-Print Network (OSTI)

Influence of Location, Population, and Climate on Building Damage and Fatalities due to Australian) in Australia since 1925 in light of the 2009 Black Saturday fires in Victoria in which 173 people lost recent reminder of the potential for natural hazards to impact Australian communities (Crompton and Mc

Colorado at Boulder, University of

143

Tune modulation due to synchrotron oscillations and chromaticity, and the dynamic aperture  

SciTech Connect

A tracking study was done of the effects of a tune modulation, due to synchrotron oscillations and the tune dependence on momentum (chromaticity), on the dynamic aperture. The studies were done using several RHIC lattices and tracking runs of about 1 {times} 10{sup 6} turns. The dynamic aperture was found to decrease roughly linearly with the amplitude of the tune modulation and may be represented by A = A{sub o}(l--10 {Delta}{nu}) where A{sub o} is the dynamic aperture for {Delta}{nu} = 0, and {Delta}{nu} is the tune modulation amplitude. In Eq. (1), the range of {Delta}{nu} is such that lower order non-linear resonances, like the 1/3 and 1/4 resonance axe not crossed because of the tune modulation. Three different cases were studied, corresponding to RHIC lattices with different {beta}*, and with different synchrotron oscillation amplitudes. In each case, the tune modulation amplitude was varied by changing the chromaticity. In each case, roughly the same result, Eq. (1), was found. The result found here for the effect of a tune modulation due to chromaticity may be compared with the result found for the effect of a tune modulation due to a gradient ripple in the quadrupoles, which was A = A{sub o}(l--42 {Delta}{nu}). The effect of a {Delta}{nu} due to a gradient ripple appears to be about 4 times stronger than the effect of a {Delta}{nu} due to chromaticity and synchrotron oscillations.

Parzen, G.

1994-03-01T23:59:59.000Z

144

Energy shifts of Rydberg atoms due to patch fields near metal surfaces  

SciTech Connect

The statistical properties of patch electric fields due to a polycrystalline metal surface are calculated. The fluctuations in the electric field scale like 1/z{sup 2} when z>>w, where z is the distance to the surface and w is the characteristic length scale of the surface patches. For typical thermally evaporated gold surfaces these field fluctuations are comparable to the image field of an elementary charge, and scale in the same way with distance to the surface. Expressions for calculating the statistics of the inhomogeneous broadening of Rydberg-atom energies due to patch electric fields are presented. Spatial variations in the patch fields over the Rydberg orbit are found to be insignificant.

Carter, J. D.; Martin, J. D. D. [Department of Physics and Astronomy and Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario, N2L 3G1 (Canada)

2011-03-15T23:59:59.000Z

145

Calculation of the reactivity feedback due to core-assembly bowing in LMFBRs  

SciTech Connect

The nonuniformity of the temperature distribution in an LMFBR leads to differential thermal expansion of the walls of an assembly hexcan. These thermal expansion differentials cause the hexcan to distort or bow. Consequentially, the assembly experiences a spatial displacement, which results in a change in reactivity for the core. A computational model to calculate the reactivity feedback due to material displacements induced by assembly bowing effects has been developed.

Not Available

1983-01-01T23:59:59.000Z

146

Inequalities in Taxation of Farm Lands and City Property Due to Scope and Method of Assessment.  

E-Print Network (OSTI)

LIERARY. A & M COLLEGE, CAWPUS. E39-932-10M-L180 TEXAS AGRICULTURAL EXPERIMENT STATION A. B. CONNER, DIRECTOR COLLEGE STATION, BRAZOS COUNTY, TEXAS BULLETIN NO. 458 SEI -- . -. Inequalities in Taxation of Farm Lands and City Property Due... are the assessed values of properties comparable, both of the same and different kinds in the same and in different governmental 6 BULLETIN NO. 458, TEXAS AGRICULTURAL EXPERIMENT STATION units? What is the effect of partial property assessments and inequalities...

Gabbard, L. P. (Letcher P.)

1932-01-01T23:59:59.000Z

147

Study on structural damage of ships due to collision and grounding  

SciTech Connect

In this paper, structural failure of tankers due to collisions and groundings is studied. To investigate failure mechanism and energy absorption capacity of ship structures. Experiments and numerical simulations are carried out. In the numerical simulations, failure of fillet welds and rupture of plates are taken into account. To investigate structural integrity of Mid-Deck Tanker, which was newly developed to reduce accidental oil outflow, numerical simulations of grounding of the tanker are performed.

Kuroiwa, T.; Nakamura, T.; Kawamoto, Y. [Mitsubishi Heavy Industries, Ltd., Nagasaki (Japan); Kondo, M. [Mitsubishi Heavy Industries, Ltd., Kobe (Japan); Kusuba, S. [Pal Corp., Nagasaki (Japan)

1994-12-31T23:59:59.000Z

148

Physics 216 Problem Set 2 Spring 2012 DUE: THURSDAY, APRIL 26, 2012  

E-Print Network (OSTI)

Physics 216 Problem Set 2 Spring 2012 DUE: THURSDAY, APRIL 26, 2012 1. You are the creator and other useful facts can be found in Handbook of Mathematical Functions, by Abramowitz and Stegun.) How well does the WKB approximation do? (b) Using m c = m â?¢ c = 1.5 GeV/c 2 , and m b = mâ?¢ b = 4.5 GeV/c 2

California at Santa Cruz, University of

149

Modification of the Doppler Effect due to the Helicity-Rotation Coupling  

E-Print Network (OSTI)

The helicity-rotation coupling and its current empirical basis are examined. The modification of the Doppler effect due to the coupling of photon spin with the rotation of the observer is considered in detail in connection with its applications in the Doppler tracking of spacecraft. Further implications of this coupling and the possibility of searching for it in the intensity response of a rotating detector are briefly discussed.

Bahram Mashhoon

2002-09-22T23:59:59.000Z

150

Stellar energy-loss rates due to S, P, or T neutral currents  

Science Journals Connector (OSTI)

The energy-loss rate in stellar matter due to neutrino production is calculated assuming that the weak leptonic neutral current includes scalar, pseudoscalar, or tensor covariants. The processes e+ + e-?? + ?¯, ? + e?e + ? + ?¯, e + Z?e + Z + ? + ?¯, and ? + ??? + ?¯ are considered in the respective temperature and density regions of physical significance. Comparison with observed stellar lifetimes allows an upper limit to be placed on the new couplings.

Duane A. Dicus and Edward W. Kolb

1977-02-15T23:59:59.000Z

151

Deep dielectric charging effects due to high-energy electrons in earth's outer magnetosphere  

Science Journals Connector (OSTI)

Many spacecraft operational problems in the earth's outer magnetosphere appear to be due to intense, transient radiation phenomena. Three types of naturally occuring, and highly variable, hostile particle radiation environments are encountered at, or near, the geostationary orbit: (1) high-energy protons due to solar flares; (2) energetic ions and electrons produced by magnetospheric substorms; and (3) very-high-energy electrons of uncertain origin. In this paper, particular emphasis is given to highly relativistic electrons (3–10 MeB). Electron fluxes and energy spectra are shown which were measured by two high-energy electron sensory systems at 6.6RE from 1979 through 1984. Large, persistent increases in this population were found to be relatively infrequent and sporadic in 1978-81 around solar maximum. During the approach to solar minimum (1981-present) it is observed that the highly relastivistic electrons occur with occur with a regular 27-day periodicity, and are well associated with the re-established solar wind stream structures. Through a superposed epoch analysis technique we show that an energetic electron enhancement typically rises on 2- to 3-day time scale and decays on 3- to 4-day scale at essentially all energies above ca. 3 MeV. The present analysis suggests that these electrons have a very deletrious influence on spacecraft systems due to deep dielectric charging and low-dose susceptibility effects.

D.N. Baker; R.D. Belian; P.R. Higbie; R.W. Klebesadel; J.B. Blake

1987-01-01T23:59:59.000Z

152

METR 2603.001, Spring 2014, Dr. LaDue Syllabus, METR 2603.001, Spring 2014, p. 1  

E-Print Network (OSTI)

METR 2603.001, Spring 2014, Dr. LaDue Syllabus, METR 2603.001, Spring 2014, Carson Engineering Center Rm 117 Instructor: Dr. LaDue Email: dzaras;METR 2603.001, Spring 2014, Dr. LaDue Syllabus, METR 2603.001, Spring 2014

Droegemeier, Kelvin K.

153

Chronic Radiation-induced Alteration in Hematopoietic Repair during Preclinical Phases of Aplastic Anemia and Myeloproliferative Disease: Assessing Unscheduled DNA Synthesis Responses  

Science Journals Connector (OSTI)

...National Laboratory, Illinois 60439. | Journal...Laboratory, Argonne, Illinois 60439 ABSTRACT Protracted...count- ing (under oil immersion microscopy...week). d Average cumulative exposure doses...removed from exposure field for 504 days prior...granulocyte/ monocyte production were markedly reduced...

Thomas M. Seed and Susan M. Meyers

1993-10-01T23:59:59.000Z

154

A general model for chemical erosion of carbon materials due to low-energy H + impact  

Science Journals Connector (OSTI)

Modeling the chemical erosion of carbon materials due to low-energy H + impact is of paramount importance for the prediction of the behavior of carbon-based plasma-facing components in nuclear fusion devices. In this paper a simple general model describing both energy and temperature dependence of carbon-based chemical erosion is presented. Enlightened by Hopf’s model {Hopf et al. [J. Appl. Phys.94 2373 (Year: 2003)} the chemical erosion is separated into the contributions from three mechanisms: thermal chemical erosion energetic chemical sputtering and ion-enhanced chemical erosion. Using input from the Monte Carlo code TRIDYN this model is able to reproduce experimental data well.

Shengguang Liu; Jizhong Sun; Shuyu Dai; Thomas Stirner; Dezhen Wang

2010-01-01T23:59:59.000Z

155

Influence of architectural screens on rooftop concentrations due to effluent from short stacks  

SciTech Connect

This paper describes the wind tunnel study conducted on behalf of the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) to evaluate and quantify the effect of architectural screens on rooftop concentration levels due to effluent from short stacks. An equivalent stack height (ESH) concept is introduced, which is used to develop a stack height reduction (SHR) factor that may be used in conjunction with existing stack design procedures found in the 1997 ASHRAE Handbook--Fundamentals to account for the presence of architectural screens.

Petersen, R.L.; Carter, J.J.; Ratcliff, M.A.

1999-07-01T23:59:59.000Z

156

Variation in the aerodynamic drag coefficient due to changes in the shape of an automobile  

E-Print Network (OSTI)

VARIATION IN THE AERODXMMIC DRAG COEEEICIENT DUE TO CHANGES LN THE SHAPE OF AN AUTOMOBILE A Thesis by JOHN GILBERT MILLI%MS Su'bmitned to the Graduate College of the Texas A&M University in partial fulfillment of the requirements fo... Air Density C HAFTER I IliiTRODUCTION During the early years of the automobile, little or no effort was made to explore the problem of aerodynamic drag. This situation was the result oi' two factors. First, the passenger cars of shat time were...

Williams, John Gilbert

1968-01-01T23:59:59.000Z

157

Uncertainty due to non-linearity in radiation thermometers calibrated by multiple fixed points  

SciTech Connect

A new method to estimate the uncertainty due to non-linearity is described on the n= 3 scheme basis. The expression of uncertainty is mathematically derived applying the random walk method. The expression is simple and requires only the temperatures of the fixed points and a relative uncertainty value for each flux-doubling derived from the non-linearity measurement. We also present an example of the method, in which the uncertainty of temperature measurement by a radiation thermometer is calculated on the basis of non-linearity measurement.

Yamaguchi, Y.; Yamada, Y. [National Metrology Institute of Japan, AIST, Tsukuba, Ibaraki (Japan)] [National Metrology Institute of Japan, AIST, Tsukuba, Ibaraki (Japan)

2013-09-11T23:59:59.000Z

158

The Discoloration of the Taj Mahal due to Particulate Carbon and Dust Deposition  

Science Journals Connector (OSTI)

Although it has been generally believed that the discoloration is in some way linked with poor air quality in the Agra region, the specific components of air pollution responsible have yet to be identified. ... Many measures have been undertaken to avoid the impact of local air pollution, including restricting traffic within 1 km of the grounds and limiting the emissions of industrial pollution in the city of Agra, where the Taj Mahal is located. ... Results suggested impacts on crop yields due to aerosol dry deposition could be considerable in this region and a previously neglected economic incentive for China to mitigate air pollution. ...

M. H. Bergin; S. N. Tripathi; J. Jai Devi; T. Gupta; M. Mckenzie; K. S. Rana; M. M. Shafer; Ana M. Villalobos; J. J. Schauer

2014-12-03T23:59:59.000Z

159

Forces due to waves in the presence of currents on a submerged model structure  

E-Print Network (OSTI)

OF SCIENCE December 1985 Major Subject: Ocean Engineering FORCES DUE TO WAVES IN THE PRESENCE OF CURRENTS ON A SUBMERGED MODEL STRUCTURE A Thesis by DAVID RAY SHIELDS Approved as to style and content by: Jo n . Her &c (Chairman of Committee) K...-induced and nonwave-induced (ZO). Nonwave-induced loads are the result of nonwave-induced currents and fluid-entrained spray acting upon the structure which may extend above the water's free surface. The wave-induced hydrodynamic loads are the result of ocean...

Shields, David Ray

2012-06-07T23:59:59.000Z

160

Nonlinear dissipation of circularly polarized Alfven waves due to the beam-induced obliquely propagating waves  

SciTech Connect

In the present study, the dissipation processes of circularly polarized Alfven waves in solar wind plasmas including beam components are numerically discussed by using a 2-D hybrid simulation code. Numerical results suggest that the parent Alfven waves are rapidly dissipated due to the presence of the beam-induced obliquely propagating waves, such as kinetic Alfven waves. The nonlinear wave-wave coupling is directly evaluated by using the induction equation for the parent wave. It is also observed both in the 1-D and 2-D simulations that the presence of large amplitude Alfven waves strongly suppresses the beam instabilities.

Nariyuki, Y. [Faculty of Human Development, University of Toyama, 3190, Toyama City, Toyama 930-8555 (Japan); Hada, T. [Department of Earth System Science and Technology, Kyushu University, 6-1, Kasuga City, Fukuoka 816-8580 (Japan); Tsubouchi, K. [Department of Earth and Planetary Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033 (Japan)

2012-08-15T23:59:59.000Z

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161

Optical bistability at low light level due to collective atomic recoil  

E-Print Network (OSTI)

We demonstrate optical nonlinearities due to the interaction of weak optical fields with the collective motion of a strongly dispersive ultracold gas. The combination of a recoil-induced resonance (RIR) in the high gain regime and optical waveguiding within the dispersive medium enables us to achieve a collective atomic cooperativity of $275 \\pm 50$ even in the absence of a cavity. As a result, we observe optical bistability at input powers as low as 20 pW. The present scheme allows for dynamic optical control of the dispersive properties of the ultracold gas using very weak pulses of light. The experimental observations are in good agreement with a theoretical model.

M. Vengalattore; M. Hafezi; M. D. Lukin; M. Prentiss

2008-04-15T23:59:59.000Z

162

Continuum-kinetic-microscopic model of lung clearance due to core-annular fluid entrainment  

SciTech Connect

The human lung is protected against aspirated infectious and toxic agents by a thin liquid layer lining the interior of the airways. This airway surface liquid is a bilayer composed of a viscoelastic mucus layer supported by a fluid film known as the periciliary liquid. The viscoelastic behavior of the mucus layer is principally due to long-chain polymers known as mucins. The airway surface liquid is cleared from the lung by ciliary transport, surface tension gradients, and airflow shear forces. This work presents a multiscale model of the effect of airflow shear forces, as exerted by tidal breathing and cough, upon clearance. The composition of the mucus layer is complex and variable in time. To avoid the restrictions imposed by adopting a viscoelastic flow model of limited validity, a multiscale computational model is introduced in which the continuum-level properties of the airway surface liquid are determined by microscopic simulation of long-chain polymers. A bridge between microscopic and continuum levels is constructed through a kinetic-level probability density function describing polymer chain configurations. The overall multiscale framework is especially suited to biological problems due to the flexibility afforded in specifying microscopic constituents, and examining the effects of various constituents upon overall mucus transport at the continuum scale.

Mitran, Sorin, E-mail: mitran@unc.edu

2013-07-01T23:59:59.000Z

163

Prediction of underwater noise and far field propagation due to pile driving for offshore wind farms  

Science Journals Connector (OSTI)

Wind energy plays a key role towards a greener and more sustainable energy generation. Due to limited onshore areas and possible negative effects on human living space offshore wind parks become increasingly popular. However during construction by pile driving high levels of underwater sound emission are observed. To avoid negative effects on marine mammals and other sea life different approaches are currently investigated to cut down the sound pressure levels like e.g. bubble curtains or cofferdams. In order to predict the expected underwater noise both with and without sound damping measures numerical simulation models are needed to avoid complex and costly offshore tests. Within this contribution possible modelling strategies for the prediction of underwater noise due to pile driving are discussed. Different approaches are shown for the direct adjacencies of the pile and for the far field sound propagation. The effectivity of potential noise mitigation measures is investigated using a detailed finite element model of the surroundings of the pile. Far field propagation in the kHz range at distances of several kilometres from the pile on the other hand is computed by a model based on wavenumber integration. Finally the model validation with corresponding offshore tests is addressed.

Stephan Lippert; Tristan Lippert; Kristof Heitmann; Otto Von Estorff

2013-01-01T23:59:59.000Z

164

Prediction of underwater noise and far field propagation due to pile driving for offshore wind farms  

Science Journals Connector (OSTI)

Wind energy plays a key role toward a greener and more sustainable energy generation. Due to limited onshore areas and possible negative effects on human living space offshore wind parks become increasingly popular. During construction by pile driving however high levels of underwater sound emission are observed. To avoid negative effects on marine mammals and other sea life different approaches like e.g. bubble curtains or cofferdams are currently investigated to cut down the sound pressure levels. In order to predict the expected underwater noise both with and without sound damping measures numerical simulation models are needed to avoid complex and costly offshore tests. Within this contribution possible modeling strategies for the prediction of underwater noise due to pile driving are discussed. Different approaches are shown for the direct adjacencies of the pile and for the far field sound propagation. The effectivity of potential noise mitigation measures is investigated using a detailed finite element model of the surroundings of the pile. The far field propagation in the kilohertz range at distances of several kilometer from the pile on the other hand is computed by a model based on wavenumber integration. Finally the model validation with corresponding offshore tests is addressed.

Stephan Lippert; Tristan Lippert; Kristof Heitmann

2013-01-01T23:59:59.000Z

165

Wind energy potential assessment considering the uncertainties due to limited data  

Science Journals Connector (OSTI)

A new Bayesian approach is proposed to estimate the annual energy production (AEP) of a site where construction of wind turbines is considered. The approach uses long-term wind speeds of a nearby weather station and short-term wind speeds near the target site. Uncertainties exist due to the limited amount of data in the target site, in addition to the inherent uncertainties in the wind speed, the air density, the surface roughness exponent, and the power performance of the turbine. The proposed method systematically addresses these uncertainties and provides the distribution of the AEP. For illustration, we used the wind speed data near Yeosu, Korea, and the power performance curve of a 3 MW turbine. For the site and the turbine studied, the range given by the 95% confidence interval corresponded to 8.9% of the mean AEP, and the range given by the 99% confidence interval corresponded to 11.9% of the mean AEP. Benefits of using the Bayesian approach compared to the classical statistical inference was also illustrated with the case study. The proposed approach provides a more conservative estimation considering the uncertainties due to the limited amount of data. Distributions of parameters of the prediction model are also provided, which enables a more detailed analysis of the prediction.

Sungmoon Jung; O. Arda Vanli; Soon-Duck Kwon

2013-01-01T23:59:59.000Z

166

Assessment of damage to the desert surfaces of Kuwait due to the Gulf War  

SciTech Connect

This is a preliminary report on a joint research project by Boston University and the Kuwait Institute for Scientific Research that commenced in April 1992. The project aim is to establish the extent and nature of environmental damage to the desert surface and coastal zone of Kuwait due to the Gulf War and its aftermath. Change detection image enhancement techniques were employed to enhance environmental change by comparison of Landsat Thematic Mapper images obtained before the wars and after the cessation of the oil and well fires. Higher resolution SPOT images were also utilized to evaluate the nature of the environmental damage to specific areas. The most prominent changes were due to: (1) the deposition of oil and course-grained soot on the desert surface as a result of oil rain'' from the plume that emanated from the oil well fires; (2) the formation of hundreds of oil lakes, from oil seepage at the damaged oil well heads; (3) the mobilization of sand and dust and (4) the pollution of segments of the coastal zone by the deposition of oil from several oil spills. Interpretation of satellite image data are checked in the field to confirm the observations, and to assess the nature of the damage. Final results will be utilized in establishing the needs for remedial action to counteract the harmful effects of the various types of damage to the environment of Kuwait.

El-Baz, F. (Boston Univ., MA (United States). Center for Remote Sensing); Al-Ajmi, D. (Kuwait Inst. for Scientific Research (Kuwait). Environmental and Earth Sciences Div.)

1993-01-01T23:59:59.000Z

167

Enhanced Ge/Si(001) island areal density and self-organization due to P predeposition  

SciTech Connect

The predeposition of P, with coverages {theta}{sub P} ranging from 0 to 1 ML, on Si(001) significantly increases both the areal density and spatial self-organization of Ge islands grown by gas-source molecular beam epitaxy from hydride precursors. The Ge island density {rho}{sub Ge} initially increases with {theta}{sub P}, reaching a maximum of 1.4 x 10{sup 10} cm{sup -2} at {theta}{sub P} = 0.7 ML, a factor of four times higher than on bare Si(001) under the same deposition conditions, before decreasing at higher P coverages. The increase in {rho}{sub Ge}({theta}{sub P}) is due to a corresponding decrease in Ge adatom mean free paths resulting from passivation of surface dangling bonds by adsorbed pentavalent P atoms which, in addition, leads to surface roughening and, therefore, higher Ge coverages at constant Ge{sub 2}H{sub 6} dose. As {theta}{sub P} (and hence, {rho}{sub Ge}) increases, so does the degree of Ge island ordering along <100> directions due to the anisotropic strain field surrounding individual islands. Similar results are obtained for Ge island growth on P-doped Si(001) layers where strong P surface segregation provides partial monolayer coverage prior to Ge deposition.

Cho, B.; Bareno, J.; Petrov, I.; Greene, J. E. [Materials Science Department and the Frederick-Seitz Materials Research Laboratory, University of Illinois, 104 South Goodwin Ave., Urbana, Illinois 61801 (United States)

2011-05-01T23:59:59.000Z

168

Transient Eddy Current Response Due to a Subsurface Crack in a Conductive Plate  

SciTech Connect

Eddy current nondestructive evaluation (NDE) is usually carried out by exciting a time harmonic field using an inductive probe. However, a viable alternative is to use transient eddy current NDE in which a current pulse in a driver coil produces a transient .eld in a conductor that decays at a rate dependent on the conductivity and the permeability of the material and the coil configuration. By using transient eddy current, it is possible to estimate the properties of the conductive medium and to locate and size potential .aws from the measured probe response. The fundamental study described in this dissertation seeks to establish a theoretical understanding of the transient eddy current NDE. Compared with the Fourier transform method, the derived analytical formulations are more convenient when the transient eddy current response within a narrow time range is evaluated. The theoretical analysis provides a valuable tool to study the effect of layer thickness, location of defect, crack opening as well as the optimization of probe design. Analytical expressions have been developed to evaluate the transient response due to eddy currents in a conductive plate based on two asymptotic series. One series converges rapidly for a short time regime and the other for a long time regime and both of them agree with the results calculated by fast Fourier transform over all the times considered. The idea of asymptotic expansion is further applied to determine the induced electromotive force (EMF) in a pick-up coil due to eddy currents in a cylindrical rod. Starting from frequency domain representation, a quasi-static time domain dyadic Green's function for an electric source in a conductive plate has been derived. The resulting expression has three parts; a free space term, multiple image terms and partial reflection terms. The dyadic Green's function serves as the kernel of an electric field integral equation which defines the interaction of an ideal crack with the transient eddy currents in a conductive plate. The crack response is found using the reciprocity theorem. Good agreement is observed between the predictions of the magnetic field due to the crack and experimental measurements.

Fangwei Fu

2006-08-09T23:59:59.000Z

169

Lowe's "Toolbox for Education" grant applications due by October 12  

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

Lowe's "Toolbox for Education" Grant Applications Lowe's "Toolbox for Education" Grant Applications Community Connections: Our link to Northern New Mexico Communities Latest Issue:Dec. 2013 - Jan. 2014 All Issues » submit Lowe's "Toolbox for Education" grant applications due by October 12 Five million dollars is available for the 2012-13 school year. September 1, 2012 dummy image Read our archives Contacts Editor Linda Anderman Email Community Programs Office Kurt Steinhaus Email Over the past five years, Lowe's "Toolbox for Education " program has provided almost $25 million to more than 5,000 schools across the country. Five million dollars is available for the 2012-13 school year; grant requests must be between $2,000 and $5,000 and will be accepted until October 12, or until 1,500 requests have been received. The grants must be

170

Observation of Megagauss-Field Topology Changes due to Magnetic Reconnection in Laser-Produced Plasmas  

SciTech Connect

The spatial structure and temporal evolution of megagauss magnetic fields generated by interactions of up to 4 laser beams with matter were studied with an innovative, time-gated proton radiography method that produces images of unprecedented clarity because it uses an isotropic, truly monoenergetic backlighter (14.7-MeV protons from D{sup 3}He nuclear fusion reactions). Quantitative field maps reveal precisely and directly, for the first time, changes in the magnetic topology due to reconnection in a high-energy-density plasma (n{sub e}{approx}10{sup 20}-10{sup 22} cm{sup -3}, T{sub e}{approx}1 keV)

Li, C. K.; Seguin, F. H.; Frenje, J. A.; Rygg, J. R.; Petrasso, R. D.; Town, R. P. J.; Landen, O. L.; Knauer, J. P.; Smalyuk, V. A. [Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)

2007-08-03T23:59:59.000Z

171

Electron emission due to positronium annihilation in solid Ar, Kr, and Xe  

Science Journals Connector (OSTI)

We present measurements of positron and electron emission by solid rare-gas surfaces implanted with low-energy positrons. The electron yield exhibits a 0.5-eV-wide peak at a positron energy just above the threshold for positronium (Ps) formation, but below the electron-hole–pair threshold. A similar peak in the fraction of the incident positrons annihilating in the sample leads us to conclude that (1) slow Ps has an anomalously short diffusion length possibly due to self-trapping, and (2) energetic electrons are liberated from Ps atoms following annihilation of the positrons with valence electrons. The energy spectrum of the emitted electrons should contain information about the internal Ps wave function in the solids.

E. M. Gullikson and A. P. Mills; Jr.

1989-03-15T23:59:59.000Z

172

Failure of man-made cavities in salt and surface subsidence due to sulfur mining  

SciTech Connect

An engineering data base relevant to subsidence due to sulfur mining and to structural failure of cavities in salt is established, evaluated and documented. Nineteen failure events are discussed. Based on these documented failure events, capabilities of and inputs to a mathematical model of cavity failure are determined. Two failure events are adequately documented for use in model verification studies. A conclusion of this study that is pertinent to the Strategic Petroleum Reserve is that cavity failures in dome salt are fairly rare, but that as the number of large cavities (especially those having large roof spans) increases, failures will probably be more common unless stability and failure mechanisms of cavities are better understood.

Coates, G.K.; Lee, C.A.; McClain, W.C.; Senseny, P.E.

1981-01-01T23:59:59.000Z

173

Transient temperature rise due to ultrasound absorption at a bone/soft-tissue interface  

Science Journals Connector (OSTI)

Thermal effects due to high ultrasound absorption in bone pose an ongoing safety issue. Of considerable concern is the heating of the soft tissue adjacent to the bone surface. Mathematical models can be useful in predicting the transient temperature near the interface during insonation. This paper develops a model that provides the temperature field in terms of simple expressions that convey the functional dependence of the material properties and are easily incorporated into standards and ultrasound machine software yet are able to incorporate the material properties of both bone and soft tissue. The model contains an asymptotic theory based upon a “high-attenuation” assumption: the distance diffused by heat over the time of interest is large compared to the ultrasound attenuation length. Model predictions of temperature rise and location of maximum temperature were in close agreement with finite-element calculations using parameters appropriate for radiation-force imaging and focused-ultrasound surgery.

Matthew R. Myers

2004-01-01T23:59:59.000Z

174

Induced Optical Losses in Optoelectronic Devices due to Focused Ion Beam Damages  

E-Print Network (OSTI)

A study of damages caused by gallium focused ion beam (FIB) into III-V compounds is presented. Potential damages caused by local heating, ion implantation, and selective sputtering are presented. Preliminary analysis shows that local heating is negligible. Gallium implantation is shown to occur over areas tens of nanometers thick. Gallium accumulation as well as selective sputtering during III-V compounds milling is expected. Particularly, for GaAs, this effect leads to gallium segregation and formation of metallic clusters. Microdisk resonators were fabricated using FIB milling with different emission currents to analyze these effects on a device. It is shown that for higher emission current, thus higher implantation doses, the cavity quality factor rapidly decreases due to optical scattering losses induced by implanted gallium atoms.

Vallini, Felipe; Reis, Elohim Fonseca dos; von Zuben, Antônio Augusto; Frateschi, Newton Cesário

2012-01-01T23:59:59.000Z

175

Autonomous Motility of Active Filaments due to Spontaneous Flow-Symmetry Breaking  

E-Print Network (OSTI)

We simulate the nonlocal Stokesian hydrodynamics of an elastic filament which is active due a permanent distribution of stresslets along its contour. A bending instability of an initially straight filament spontaneously breaks flow symmetry and leads to autonomous filament motion which, depending on conformational symmetry, can be translational or rotational. At high ratios of activity to elasticity, the linear instability develops into nonlinear fluctuating states with large amplitude deformations. The dynamics of these states can be qualitatively understood as a superposition of translational and rotational motion associated with filament conformational modes of opposite symmetry. Our results can be tested in molecular-motor filament mixtures, synthetic chains of autocatalytic particles, or other linearly connected systems where chemical energy is converted to mechanical energy in a fluid environment.

Gayathri Jayaraman; Sanoop Ramachandran; Somdeb Ghose; Abhrajit Laskar; M. Saad Bhamla; P. B. Sunil Kumar; R. Adhikari

2012-10-10T23:59:59.000Z

176

Absorption Effects due to Spin in the Worldline Approach to Black Hole Dynamics  

E-Print Network (OSTI)

We generalize the effective point particle approach to black hole dynamics to include spin. In this approach dissipative effects are captured by degrees of freedom localized on the wordline. The absorptive properties of the black hole are determined by correlation functions which can be matched with the graviton absorption cross section in the long wavelength approximation. For rotating black holes, superradiance is responsible for the leading contribution. The effective theory is then used to predict the power loss due to spin in the dynamics of non-relativistic binary systems. An enhancement of three powers of the relative velocity is found with respect to the non-rotating case. Then we generalize the results to other type of constituents in the binary system, such as rotating neutron stars. Finally we compute the power loss absorbed by a test spinning black hole in a given spacetime background.

Rafael A. Porto

2007-10-26T23:59:59.000Z

177

Effects On Beam Alignment Due To Neutron-Irradiated CCD Images At The National Ignition Facility  

SciTech Connect

The 192 laser beams in the National Ignition Facility (NIF) are automatically aligned to the target-chamber center using images obtained through charged coupled device (CCD) cameras. Several of these cameras are in and around the target chamber during an experiment. Current experiments for the National Ignition Campaign are attempting to achieve nuclear fusion. Neutron yields from these high energy fusion shots expose the alignment cameras to neutron radiation. The present work explores modeling and predicting laser alignment performance degradation due to neutron radiation effects, and demonstrates techniques to mitigate performance degradation. Camera performance models have been created based on the measured camera noise from the cumulative single-shot fluence at the camera location. We have found that the effect of the neutron-generated noise for all shots to date have been well within the alignment tolerance of half a pixel, and image processing techniques can be utilized to reduce the effect even further on the beam alignment.

Awwal, A; Manuel, A; Datte, P; Burkhart, S

2011-02-28T23:59:59.000Z

178

New perspectives on the damage estimation for buried pipeline systems due to seismic wave propagation  

SciTech Connect

Over the past three decades, seismic fragility fonnulations for buried pipeline systems have been developed following two tendencies: the use of earthquake damage scenarios from several pipeline systems to create general pipeline fragility functions; and, the use of damage scenarios from one pipeline system to create specific-system fragility functions. In this paper, the advantages and disadvantages of both tendencies are analyzed and discussed; in addition, a summary of what can be considered the new challenges for developing better pipeline seismic fragility formulations is discussed. The most important conclusion of this paper states that more efforts are needed to improve the estimation of transient ground strain -the main cause of pipeline damage due to seismic wave propagation; with relevant advances in that research field, new and better fragility formulations could be developed.

Pineda Porras, Omar Andrey [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

179

Nonequilibrium dynamics of a two-channel Kondo system due to a quantum quench  

Science Journals Connector (OSTI)

Recent experiments by Potok et al. have demonstrated a remarkable tunability between a single-channel Fermi-liquid fixed point and a two-channel non-Fermi-liquid fixed point. Motivated by this we study the nonequilibrium dynamics due to a sudden quench of the parameters of a Hamiltonian from a single-channel to a two-channel anisotropic Kondo system. We find a distinct difference between the long-time behavior of local quantities related to the impurity spin as compared to that of bulk quantities related to the total (conduction electrons plus impurity) spin of the system. In particular, the local impurity spin and the local spin susceptibility are found to equilibrate but in a very slow power-law fashion which is peculiar to the non-Fermi-liquid properties of the Hamiltonian. In contrast, we find a lack of equilibration in the two-particle expectation values related to the total spin of the system.

Zurab Ratiani and Aditi Mitra

2010-03-09T23:59:59.000Z

180

Shift in the longitudinal sound velocity due to sliding charge-density waves  

Science Journals Connector (OSTI)

The nonlinear conductivity observed for moderate electric fields in NbSe3, TaS3, (TaS4)2I, and K0.3MoO3 below the charge-density-wave-transition is believed to be due to the sliding of the charge-density waves. The sliding motion leads to a Doppler shift of the x-ray diffraction peaks, but this effect has not yet been resolved. We show here that besides the Doppler shift, a sliding incommensurate charge-density wave causes a change in the longitudinal sound velocity of the crystal that is linear in the charge-density-wave velocity. The resulting anisotropic shift is estimated in a mean-field approximation and found to be experimentally observable.

S. N. Coppersmith and C. M. Varma

1984-09-15T23:59:59.000Z

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181

Nonlinear Zeno dynamics due to atomic interactions in Bose-Einstein condensate  

E-Print Network (OSTI)

We show that nonlinear interactions induce both the Zeno and anti-Zeno effects in the generalised Bose-Josephson model (with the on-site interactions and the second-order tunneling) describing Bose-Einstein condensate in double-well trap subject to particle removal from one of the wells. We find that the on-site interactions induce \\textit{only} the Zeno effect, which appears at long evolution times, whereas the second-order tunneling leads to a strong decay of the atomic population at short evolution times, reminiscent of the anti-Zeno effect, and destroys the nonlinear Zeno effect due to the on-site interactions at long times.

V. G. Navarro; V. S. Shchesnovich

2014-09-03T23:59:59.000Z

182

Dose calculation errors due to inaccurate representation of heterogeneity correction obtained from computerized tomography  

SciTech Connect

Computerized tomography (CT) is used routinely in evaluating radiation therapy isodose plans. With the introduction of 3D algorithms such as the voxel raytrace, which determines inhomogeneity corrections from actual CT Hounsfield numbers, caution must be used when evaluating isodose calculations. Artifacts from contrast media and dental work, radiopaque markers placed by the treatment planner, and changing bowel and rectal air patterns all have the potential to introduce error into the calculation due to inaccurate assessment of high or low density. Radiopaque makers such as x-spot BB's or solder wire are placed externally on the patient. Barium contrast media introduced at the time of simulation may be necessary to visualize specific anatomical structures on the CT images. While these localization and visualization tools may be necessary, it is important to understand the effects they may introduce in the planning process. Other problems encountered are patient specific and out of the control of the treatment planner. These include high- and low-density streaking caused by dental work, which produce computational errors due to overestimation, and small bowel and rectal air, the patterns of which change on a daily basis and may result in underestimation of structure density. It is important for each treatment planner to have an understanding of how this potentially tainted CT information may be applied in dose calculations and the possible effects they may have. At our institution, the voxel raytrace calculation is automatically forced any time couch angle is introduced. Errors in the calculation from the above mentioned situations may be introduced if a heterogeneity correction is applied. Examples of potential calculation errors and the magnitude of each will be discussed. The methods used to minimize these errors and the possible solutions will also be evaluated.

Williams, Greg; Tobler, Matthew; Gaffney, David; Moeller, John; Leavitt, Dennis

2002-12-31T23:59:59.000Z

183

Estimation of organ and effective dose due to Compton backscatter security scans  

SciTech Connect

Purpose: To estimate organ and effective radiation doses due to backscatter security scanners using Monte Carlo simulations and a voxelized phantom set. Methods: Voxelized phantoms of male and female adults and children were used with the GEANT4 toolkit to simulate a backscatter security scan. The backscatter system was modeled based on specifications available in the literature. The simulations modeled a 50 kVp spectrum with 1.0 mm-aluminum-equivalent filtration and a previously measured exposure of approximately 4.6 {mu}R at 30 cm from the source. Photons and secondary interactions were tracked from the source until they reached zero kinetic energy or exited from the simulation's boundaries. The energy deposited in the phantoms' respective organs was tallied and used to calculate total organ dose and total effective dose for frontal, rear, and full scans with subjects located 30 and 75 cm from the source. Results: For a full screen, all phantoms' total effective doses were below the established 0.25 {mu}Sv standard, with an estimated maximum total effective dose of 0.07 {mu}Sv for full screen of a male child. The estimated maximum organ dose due to a full screen was 1.03 {mu}Gy, deposited in the adipose tissue of the male child phantom when located 30 cm from the source. All organ dose estimates had a coefficient of variation of less than 3% for a frontal scan and less than 11% for a rear scan. Conclusions: Backscatter security scanners deposit dose in organs beyond the skin. The effective dose is below recommended standards set by the Health Physics Society (HPS) and the American National Standards Institute (ANSI) assuming the system provides a maximum exposure of approximately 4.6 {mu}R at 30 cm.

Hoppe, Michael E.; Schmidt, Taly Gilat [Department of Biomedical Engineering, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201 (United States)

2012-06-15T23:59:59.000Z

184

Numerical modelling of salinity variations due to wind and thermohaline forcing in the Persian Gulf  

Science Journals Connector (OSTI)

Salinity is an important component of the marine system. Due to shallow nature of the Persian Gulf, the salinity has been influenced by both wind driven and surface thermohaline fluxes (heat and moisture fluxes). In this study, the seasonal distribution of salinity and its variations due to wind stress and thermohaline forcing are investigated by using a three-dimensional hydrodynamic model, Coupled Hydrodynamical–Ecological Model for Regional and Shelf Seas (COHERENS). The simulation results show that the salinity in the Persian Gulf experiences dramatic spatial and temporal variations. The influence of the thermohaline forcing is considerably more than the wind stress on the salinity. The effect of the surface thermohaline fluxes over the salinity field is generally to increase the salinity for almost all the water column during the year. This effect is high during September–November where the evaporative surface salinity flux dominates over inflow of low-salinity values of Indian Ocean Surface Water. The wind forcing at the most regions of the Persian Gulf, in particular at the United Arab Emirate (UAE) coast and Bahrain–Qatar shelf, freshens the water all the year round. The wind and thermohaline forcing in March–June have strong potential to generate stratification in salinity structure. The model predictions, which are successful in simulating many features of observed pattern, indicate that the surface water of the Gulf is saltier in winter than that in spring and early summer. Both heat fluxes and wind stress play an important role for this seasonal cycle of the surface salinity.

S. Hassanzadeh; F. Hosseinibalam; A. Rezaei-Latifi

2011-01-01T23:59:59.000Z

185

Stellite 6 Friction Changes Due to Aging and In-Service Testing  

SciTech Connect

For the past several years, researchers at the Idaho National Engineering and Environmental Laboratory, under the sponsorship of the U.S. Nuclear Regulatory Commission, have been investigating the ability of motor-operated valves to close or open when subjected to design basis flow and pressure loads. Part of this research addresses the friction that occurs at the interface between the valve disc and the valve body seats during operation of a gate valve. In most gate valves, these surfaces are hardfaced with Stellite 6, a cobalt-based alloy. The nuclear industry has developed methods to analytically predict the thrust needed to operate these valves at specific pressure conditions. To produce accurate valve thrust predictions; the analyst must have a reasonably accurate, though conservative, estimate of the coefficient of friction at the disc-to-seat interface. One of the questions that remains to be answered is whether, and to what extent, aging of the disc and seat surfaces affects the disc-to-seat coefficient of friction. Specifically, does the accumulation of a surface film due to aging of these surfaces increase the coefficient of friction and if so, how much? This paper presents results of specimen tests addressing this issue with emphasis on the following: • The change in the friction coefficient of Stellite 6 as it ages and whether the friction reaches a plateau. • The effect periodic gate valve cycling due to in-service testing has on the friction coefficient. • The results of an independent review of the test methods, processes, and the results of the research to date. • The status of ongoing aging and friction testing.

Watkins, John Clifford; DeWall, Kevin George

2001-07-01T23:59:59.000Z

186

Corrosion Protection due to Bacteria /Metal Interactions E. Kus1, K. H. Nealson2 and F. Mansfeld1  

E-Print Network (OSTI)

Corrosion Protection due to Bacteria /Metal Interactions E. Kus1, K. H. Nealson2 and F. Mansfeld1 1. Corrosion and Environmental Effects Laboratory (CEEL) The Mork Family Department of Chemical Engineering Microbiologically influenced corrosion (MIC) refers to the increase of the corrosion rate of metals due to microbial

Southern California, University of

187

PHYSICAL REVIEW A 83, 032902 (2011) Energy shifts of Rydberg atoms due to patch fields near metal surfaces  

E-Print Network (OSTI)

PHYSICAL REVIEW A 83, 032902 (2011) Energy shifts of Rydberg atoms due to patch fields near metal March 2011) The statistical properties of patch electric fields due to a polycrystalline metal surface to the surface and w is the characteristic length scale of the surface patches. For typical thermally evaporated

Martin, James D. D.

188

Flow-Induced Sound and Vibration due to the Separated Shear Layer in Backward-Facing Step  

E-Print Network (OSTI)

Flow-Induced Sound and Vibration due to the Separated Shear Layer in Backward-Facing Step of the author. #12;ii Supervisory Committee Flow-Induced Sound and Vibration due to Separated Shear Layer to other equipment. Thus, vibration of the paper sheet and turbulent flow that emerged from a planar curved

Victoria, University of

189

THz generation from InN films due to destructive interference between optical rectification and photocurrent surge  

E-Print Network (OSTI)

THz generation from InN films due to destructive interference between optical rectification.1088/0268-1242/25/1/015004 THz generation from InN films due to destructive interference between optical rectification investigated the characteristics of THz generation including the dependence of the output power

Gilchrist, James F.

190

A weak acceleration effect due to residual gravity in a multiply connected universe  

E-Print Network (OSTI)

Could cosmic topology imply dark energy? We use a weak field (Newtonian) approximation of gravity and consider the gravitational effect from distant, multiple copies of a large, collapsed (virialised) object today (i.e. a massive galaxy cluster), taking into account the finite propagation speed of gravity, in a flat, multiply connected universe, and assume that due to a prior epoch of fast expansion (e.g. inflation), the gravitational effect of the distant copies is felt locally, from beyond the naively calculated horizon. We find that for a universe with a $T^1xR^2$ spatial section, the residual Newtonian gravitational force (to first order) provides an anisotropic effect that repels test particles from the cluster in the compact direction, in a way algebraically similar to that of dark energy. For a typical test object at comoving distance $\\chi$ from the nearest dense nodes of the cosmic web of density perturbations, the pressure-to-density ratio $w$ of the equation of state in an FLRW universe, is w \\sim - (\\chi/L)^3, where $L$ is the size of the fundamental domain, i.e. of the universe. Clearly, |w|dark energy, but the amplitude of the effect at the present epoch is too small to explain the observed dark energy density and its anisotropy makes it an unrealistic candidate for the observed dark energy.

Boudewijn F. Roukema; Stanislaw Bajtlik; Marek Biesiada; Agnieszka Szaniewska; Helena Jurkiewicz

2006-12-08T23:59:59.000Z

191

Physical property changes in hydrate-bearingsediment due to depressurization and subsequent repressurization  

SciTech Connect

Physical property measurements of sediment cores containing natural gas hydrate are typically performed on material exposed at least briefly to non-in situ conditions during recovery. To examine effects of a brief excursion from the gas-hydrate stability field, as can occur when pressure cores are transferred to pressurized storage vessels, we measured physical properties on laboratory-formed sand packs containing methane hydrate and methane pore gas. After depressurizing samples to atmospheric pressure, we repressurized them into the methane-hydrate stability field and remeasured their physical properties. Thermal conductivity, shear strength, acoustic compressional and shear wave amplitudes and speeds are compared between the original and depressurized/repressurized samples. X-ray computed tomography (CT) images track how the gas-hydrate distribution changes in the hydrate-cemented sands due to the depressurization/repressurization process. Because depressurization-induced property changes can be substantial and are not easily predicted, particularly in water-saturated, hydrate-bearing sediment, maintaining pressure and temperature conditions throughout the core recovery and measurement process is critical for using laboratory measurements to estimate in situ properties.

Kneafsey, Timothy; Waite, W.F.; Kneafsey, T.J.; Winters, W.J.; Mason, D.H.

2008-06-01T23:59:59.000Z

192

A Thoracic Mechanism of Mild Traumatic Brain Injury Due to Blast Pressure Waves  

E-Print Network (OSTI)

The mechanisms by which blast pressure waves cause mild to moderate traumatic brain injury (mTBI) are an open question. Possibilities include acceleration of the head, direct passage of the blast wave via the cranium, and propagation of the blast wave to the brain via a thoracic mechanism. The hypothesis that the blast pressure wave reaches the brain via a thoracic mechanism is considered in light of ballistic and blast pressure wave research. Ballistic pressure waves, caused by penetrating ballistic projectiles or ballistic impacts to body armor, can only reach the brain via an internal mechanism and have been shown to cause cerebral effects. Similar effects have been documented when a blast pressure wave has been applied to the whole body or focused on the thorax in animal models. While vagotomy reduces apnea and bradycardia due to ballistic or blast pressure waves, it does not eliminate neural damage in the brain, suggesting that the pressure wave directly affects the brain cells via a thoracic mechanism. ...

Courtney, Amy; 10.1016/j.mehy.2008.08.015

2008-01-01T23:59:59.000Z

193

Enhancement of fusion rates due to quantum effects in the particles momentum distribution in nonideal media  

E-Print Network (OSTI)

This study concerns a situation when measurements of the nonresonant cross-section of nuclear reactions appear highly dependent on the environment in which the particles interact. An appealing example discussed in the paper is the interaction of a deuteron beam with a target of deuterated metal Ta. In these experiments, the reaction cross section for d(d,p)t was shown to be orders of magnitude greater than what the conventional model predicts for the low-energy particles. In this paper we take into account the influence of quantum effects due to the Heisenberg uncertainty principle for particles in a non-ideal medium elastically interacting with the medium particles. In order to calculate the nuclear reaction rate in the non-ideal environment we apply both the Monte Carlo technique and approximate analytical calculation of the Feynman diagram using nonrelativistic kinetic Green's functions in the medium which correspond to the generalized energy and momentum distribution functions of interacting particles. We show a possibility to reduce the 12-fold integral corresponding to this diagram to a fivefold integral. This can significantly speed up the computation and control accuracy. Our calculations show that quantum effects significantly influence reaction rates such as p +7Be, 3He +4He, p +7Li, and 12C +12C. The new reaction rates may be much higher than the classical ones for the interior of the Sun and supernova stars. The possibility to observe the theoretical predictions under laboratory conditions is discussed.

N. J. Fisch; M. G. Gladush; Yu. V. Petrushevich; Piero Quarati; A. N. Starostin

2011-10-16T23:59:59.000Z

194

Enhancement of fusion rates due to quantum effects in the particles momentum distribution in nonideal media  

E-Print Network (OSTI)

This study concerns a situation when measurements of the nonresonant cross-section of nuclear reactions appear highly dependent on the environment in which the particles interact. An appealing example discussed in the paper is the interaction of a deuteron beam with a target of deuterated metal Ta. In these experiments, the reaction cross section for d(d,p)t was shown to be orders of magnitude greater than what the conventional model predicts for the low-energy particles. In this paper we take into account the influence of quantum effects due to the Heisenberg uncertainty principle for particles in a non-ideal medium elastically interacting with the medium particles. In order to calculate the nuclear reaction rate in the non-ideal environment we apply both the Monte Carlo technique and approximate analytical calculation of the Feynman diagram using nonrelativistic kinetic Green's functions in the medium which correspond to the generalized energy and momentum distribution functions of interacting particles. We...

Fisch, N J; Petrushevich, Yu V; Quarati, Piero; Starostin, A N

2011-01-01T23:59:59.000Z

195

Discrimination of gamma rays due to inelastic neutron scattering in AGATA  

E-Print Network (OSTI)

Possibilities of discriminating neutrons and gamma rays in the AGATA gamma-ray tracking spectrometer have been investigated with the aim of reducing the background due to inelastic scattering of neutrons in the high-purity germanium crystals. This background may become a serious problem especially in experiments with neutron-rich radioactive ion beams. Simulations using the Geant4 toolkit and a tracking program based on the forward tracking algorithm were carried out by emitting neutrons and gamma rays from the center of AGATA. Three different methods were developed and tested in order to find 'fingerprints' of the neutron interaction points in the detectors. In a simulation with simultaneous emission of six neutrons with energies in the range 1-5 MeV and ten gamma rays with energies between 150 and 1450 keV, the peak-to-background ratio at a gamma-ray energy of 1.0 MeV was improved by a factor of 2.4 after neutron rejection with a reduction of the photopeak efficiency at 1.0 MeV of only a factor of 1.25.

A. Ataç; A. Ka?ka?; S. Akkoyun; M. ?enyi?it; T. Hüyük; S. O. Kara; J. Nyberg

2009-06-06T23:59:59.000Z

196

Vibration and rattle impact due to low frequency noise investigated at Dulles airport  

Science Journals Connector (OSTI)

A noise study was conducted at Washington Dulles International Airport to further investigate the noise and vibration impact of thrust reversers and start of takeoff roll on communities near runways. Two different houses located on the airport property were instrumented with outdoor and indoor microphones and accelerometers mounted inside on walls windows and floor. This presentation will discuss both the experimental design and data obtained from the two different structures. Correlations between plane types outdoor signatures and acceleration levels are considered. The outdoor signatures and acceleration levels are used to investigate the conditions under which rattle of a loosely coupled window is observed. Additionally the design of a subsequent subjective study to examine the effects of rattle on human perception will be discussed. The combination of the objective measurements with the results of the subjective study is intended to give a better understanding of community impact due to airport noise. [Work is supported by the Federal Aviation Administration and the Exploratory and Foundational Program of the Applied Research Laboratory Penn State University.

2005-01-01T23:59:59.000Z

197

An opposite view data replacement approach for reducing artifacts due to metallic dental objects  

SciTech Connect

Purpose: To present a conceptually new method for metal artifact reduction (MAR) that can be used on patients with multiple objects within the scan plane that are also of small sized along the longitudinal (scanning) direction, such as dental fillings. Methods: The proposed algorithm, named opposite view replacement, achieves MAR by first detecting the projection data affected by metal objects and then replacing the affected projections by the corresponding opposite view projections, which are not affected by metal objects. The authors also applied a fading process to avoid producing any discontinuities in the boundary of the affected projection areas in the sinogram. A skull phantom with and without a variety of dental metal inserts was made to extract the performance metric of the algorithm. A head and neck case, typical of IMRT planning, was also tested. Results: The reconstructed CT images based on this new replacement scheme show a significant improvement in image quality for patients with metallic dental objects compared to the MAR algorithms based on the interpolation scheme. For the phantom, the authors showed that the artifact reduction algorithm can efficiently recover the CT numbers in the area next to the metallic objects. Conclusions: The authors presented a new and efficient method for artifact reduction due to multiple small metallic objects. The obtained results from phantoms and clinical cases fully validate the proposed approach.

Yazdi, Mehran; Lari, Meghdad Asadi; Bernier, Gaston; Beaulieu, Luc [Department of Electrical Engineering, School of Engineering, Shiraz University, Shiraz 7134851154 (Iran, Islamic Republic of) and Departement de Radio-Oncologie, Ho circumflex tel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, 11 Cote du Palais, Quebec, Quebec G1R 2J6 (Canada); Department of Electrical Engineering, School of Engineering, Shiraz University, Shiraz 7134851154 (Iran, Islamic Republic of); Departement de Radio-Oncologie, Ho circumflex tel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, 11 Cote du Palais, Quebec, Quebec G1R 2J6 (Canada); Departement de Physique, de Genie Physique et D'optique, Universite Laval, Quebec, Quebec (Canada) and Departement de Radio-Oncologie, Hotel-Dieu de Quebec, Centre Hospitalier Universitaire de Quebec, 11 Cote du Palais, Quebec, Quebec G1R 2J6 (Canada)

2011-04-15T23:59:59.000Z

198

Risk assessment of loss of structural integrity of a floating production platform due to gross errors  

Science Journals Connector (OSTI)

During the last years The Norwegian Petroleum Directorate, as well as Statoil, has put increased focus on how gross errors related to structural integrity are influencing the safety of offshore installations. Also, the loss of the P36, a floating platform outside Brazil in 2001, emphasised the importance to control gross errors in large projects. On this basis, a work to assess the risk of loss of the structural integrity of the Kristin platform, during operation, due to failure from gross errors was initiated. The Kristin platform is a permanently moored ring-pontoon semi-submersible production unit planned to be placed in the south-west part of Haltenbanken area in the North Sea in 2005. The water depth at the site is approximately 315 m. The objective of this work was to quantify the risk contribution from gross errors related to structural integrity and to pinpoint the most critical items that may govern the probability of gross error for the Kristin platform. Some of the main findings from this work are presented in this paper.

Inge Lotsberg; Odd Olufsen; Gunnar Solland; Jan Inge Dalane; Sverre Haver

2004-01-01T23:59:59.000Z

199

Unusual refinery boiler tube failures due to corrosion by sulfuric acid induced by steam leaks  

SciTech Connect

Corrosion by sulfuric acid in boilers is a low probability event because gas temperature and metal temperature of boiler tubes are high enough to avoid the condensation of sulfuric acid from flue gases. This degradation mechanism is frequently considered as an important cause of air preheaters materials degradation, where flue gases are cooled by heat transfer to the combustion air. Corrosion is associated to the presence of sulfuric acid, which condensates if metal temperature (or gas temperature) is below of the acid dew point. In economizer tubes, sulfuric acid corrosion is an unlikely event because flue gas and tube temperatures are normally over the acid dewpoint. In this paper, the failure analysis of generator tubes (similar to the economizer of bigger boilers) of two small oil-fired subcritical boilers is reported. It is concluded that sulfuric acid corrosion was the cause of the failure. The sulfuric acid condensation was due to the contact of flue gases containing SO{sub 3} with water-steam spray coming from leaks at the interface of rolled tube to the drum. Considering the information gathered from these two cases studied, an analysis of this failure mechanism is presented including a description of the thermodynamics condition of water leaking from the drum, and an analysis of the factors favoring it.

Lopez-Lopez, D.; Wong-Moreno, A. [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

1998-12-31T23:59:59.000Z

200

Discrimination of gamma rays due to inelastic neutron scattering in AGATA  

E-Print Network (OSTI)

Possibilities of discriminating neutrons and ? rays in the AGATA ?-ray tracking spectrometer have been investigated with the aim of reducing the background due to inelastic scattering of neutrons in the high-purity germanium crystals. This background may become a serious problem especially in experiments with neutron-rich radioactive ion beams. Simulations using the Geant4 toolkit and a tracking program based on the forward tracking algorithm were carried out by emitting neutrons and ? rays from the center of AGATA. Three different methods were developed and tested in order to find “fingerprints ” of the neutron interaction points in the detectors. In a simulation with simultaneous emission of six neutrons with energies in the range 1-5 MeV and ten ? rays with energies between 150 and 1450 keV, the peak-to-background ratio at a ?-ray energy of 1.0 MeV was improved by a factor of 2.4 after neutron rejection with a reduction of the photopeak efficiency at 1.0 MeV of only a factor of 1.25.

A. Ataç; A. Kas¸kas A; S. Akkoyun A; M. S¸enyi?git A; T. Hüyük A; S. O. Kara A; J. Nyberg B

Note: This page contains sample records for the topic "unscheduled downtime due" 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

Observations of proton beam enhancement due to erbium hydride on gold foil targets  

SciTech Connect

Recent theoretical work suggests that the conversion efficiency from laser to protons in laser irradiated thin foil experiments increases if the atomic mass of nonhydrogen atoms on the foil rear surface increases. Experiments were performed at the Lawrence Livermore National Laboratory Jupiter Laser Facility to observe the effect of thin foils coated with erbium hydride on the conversion efficiency from laser to protons. Gold foils with and without the rear surface coated with ErH{sub 3} were irradiated using the ultrashort pulse, 40 TW Callisto laser. An argon-ion etching system was used to remove naturally occurring nanometer thick surface layer contaminants from the hydride. With the etcher, gold with ErH{sub 3} showed a 25% increase in the conversion efficiency to protons above 3.4 MeV relative to contaminants, where C{sup +4} and H{sup +} were the dominant ion species. No difference in the ion signal was observed without first cleaning the hydrides. Simulations using the hybrid PIC code, LSP, revealed that the increase due to erbium hydride versus contaminants is 37% for protons above 3 MeV.

Offermann, D. T.; Van Woerkom, L. D. [Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States); Freeman, R. R. [Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States); Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, California 92093 (United States); Department of Applied Science, University of California Davis, Livermore, California 94550 (United States); Foord, M. E.; Hey, D.; Key, M. H.; Mackinnon, A. J.; MacPhee, A. G.; Patel, P. K.; Ping, Y.; Sanchez, J. J.; Shen, N. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Bartal, T.; Beg, F. N. [Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, California 92093 (United States); Espada, L. [Sandia National Laboratory, Albuquerque, New Mexico 87185 (United States); Chen, C. D. [Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2009-09-15T23:59:59.000Z

202

Degradation of the mechanical properties of Zircaloy-4 due to hydrogen embrittlement  

Science Journals Connector (OSTI)

During nuclear reactor operation, the embrittlement of components made of zirconium-based alloys is observed. The degradation of their mechanical properties is due to the combined effect of hydrogen absorption and the damage caused by neutron irradiation. In this work we studied the influence of hydrogen content on the fracture toughness of a Zircaloy-4 alloy. Compact tension (CT) specimens were obtained from a hot-rolled, annealed and finally cold-rolled material. The observed microstructure consisted of ?-Zr rounded grains with diameters of about 15 ?m. Selection of the tested material was guided by the need to perform experiments on samples with a texture equivalent to the cladding components of Candu-type nuclear reactors. The specimens were fatigue precracked and hydrogen charged before testing. Two different reactions were performed. Specimens with a final hydrogen content ranging from 10 to 400 ppm were obtained by electrochemical charging and those with a final concentration of up to 2000 ppm were charged by absorption under a gaseous atmosphere. In both cases, an homogeneous distribution of dissolved hydrogen and hydride phases was obtained. The dependence of the toughness on temperature and hydrogen content was measured on CT specimens. The analysis was performed in terms of J-integral and resistance curves.

G Bertolino; G Meyer; J Perez Ipiña

2002-01-01T23:59:59.000Z

203

Measurements of solar flux density distribution on a plane receiver due to a flat heliostat  

SciTech Connect

An experimental facility is designed and manufactured to measure the solar flux density distribution on a central flat receiver due to a single flat heliostat. The tracking mechanism of the heliostat is controlled by two stepping motors, one for tilt angle control and the other for azimuth angle control. A x-y traversing mechanism is also designed and mounted on a vertical central receiver plane, where the solar flux density is to be measured. A miniature solar sensor is mounted on the platform of the traversing mechanism, where it is used to measure the solar flux density distribution on the receiver surface. The sensor is connected to a data acquisition card in a host computer. The two stepping motors of the heliostat tracking mechanism and the two stepping motors of the traversing mechanism are all connected to a controller card in the same host computer. A software `TOWER` is prepared to let the heliostat track the sun, move the platform of the traversing mechanism to the points of a preselected grid, and to measure the solar flux density distribution on the receiver plane. Measurements are carried out using rectangular flat mirrors of different dimensions at several distances from the central receiver. Two types of images were identified on the receiver plane - namely, apparent (or visible) and mirror-reflected radiation images. Comparison between measurements and a mathematical model validates the mathematical model. 13 refs., 12 figs., 1 tab.

Elsayed, M.M.; Fathalah, K.A.; Al-Rabghi, O.M. [King Abdulaziz Univ., Jeddah (Saudi Arabia)] [King Abdulaziz Univ., Jeddah (Saudi Arabia)

1995-06-01T23:59:59.000Z

204

Periodic Flux Variability of Stars due to the Reflex Doppler Effect Induced by Planetary Companions  

E-Print Network (OSTI)

Upcoming space-based photometric satellites offer the possibility of detecting continuum flux variability at the micro-magnitude level. We show that the Doppler flux variability induced by the reflex motion of stars due to planetary companions has an amplitude of (3-alpha)K/c, where K is the reflex radial velocity amplitude and alpha is the logarithmic slope of source spectral flux in the observed frequency band. For many of the known close-in planetary systems with periods less than ~0.2 years, the periodic Doppler variability is of order a micromagnitude, and is significant relative to the variability caused by reflected light from the planetary companion. For companions with periods greater than ~0.2 years, the Doppler signal is larger than the reflected light signal. We show that the future photometric satellites should reach the sensitivity to detect this Doppler variability. In particular, the Kepler satellite should have the photon-noise sensitivity to detect at a signal-to-noise ratio > 5, all planets with minimum mass greater than 5 Jupiter masses, and periods less than 0.1 years around the 10,000 main-sequence stars with spectral types A through K and apparent magnitude V<12 in its field-of-view.

Abraham Loeb; B. Scott Gaudi

2003-03-10T23:59:59.000Z

205

Runaway greenhouse effect on exomoons due to irradiation from hot, young giant planets  

E-Print Network (OSTI)

The Kepler space telescope has detected transits of objects as small as the Earth's Moon, and moons as small as 0.2 Earth masses can be detected in the Kepler data by transit timing and transit duration variations of their host planets. Such massive moons around giant planets in the stellar habitable zone (HZ) could serve as habitats for extraterrestrial life. We here assess the danger of exomoons to be in a runaway greenhouse (RG) state due to extensive heating from the planet. We apply pre-computed evolution tracks for giant planets to calculate the incident planetary radiation on the moon as a function of time. The total energy budget of stellar flux, illumination from the planet, and tidal heating in the satellite is compared to the critical flux for the moon to experience an RG effect. Irradiation from a 13-Jupiter-mass planet onto an Earth-sized moon at a distance of ten Jupiter radii can drive an RG state on the moon for about 200 Myr. If stellar illumination equivalent to that received by Earth from t...

Heller, René

2013-01-01T23:59:59.000Z

206

Bose-glass phases of ultracold atoms due to cavity backaction  

E-Print Network (OSTI)

We determine the quantum ground-state properties of ultracold bosonic atoms interacting with the mode of a high-finesse resonator. The atoms are confined by an external optical lattice, whose period is incommensurate with the cavity mode wave length, and are driven by a transverse laser, which is resonant with the cavity mode. While for pointlike atoms photon scattering into the cavity is suppressed, for sufficiently strong lasers quantum fluctuations can support the build-up of an intracavity field, which in turn amplifies quantum fluctuations. The dynamics is described by a Bose-Hubbard model where the coefficients due to the cavity field depend on the atomic density at all lattice sites. Quantum Monte Carlo simulations and mean-field calculations show that for large parameter regions cavity backaction forces the atoms into clusters with a checkerboard density distribution. Here, the ground state lacks superfluidity and possesses finite compressibility, typical of a Bose-glass. This system constitutes a novel setting where quantum fluctuations give rise to effects usually associated with disorder.

Hessam Habibian; André Winter; Simone Paganelli; Heiko Rieger; Giovanna Morigi

2012-06-22T23:59:59.000Z

207

Buoyancy driven flow in a hot water tank due to standby heat loss  

Science Journals Connector (OSTI)

Results of experimental and numerical investigations of thermal behavior in a vertical cylindrical hot water tank due to standby heat loss of the tank are presented. The effect of standby heat loss on temperature distribution in the tank is investigated experimentally on a slim 150 l tank with a height to diameter ratio of 5. A tank with uniform temperatures and with thermal stratification is studied. A detailed computational fluid dynamics (CFD) model of the tank is developed to calculate the natural convection flow in the tank. The distribution of the heat loss coefficient for the different parts of the tank is measured by experiments and used as input to the CFD model. Water temperatures at different levels of the tank are measured and compared to CFD calculated temperatures. The investigations focus on validation of the CFD model and on understanding of the CFD calculations. The results show that the CFD model predicts satisfactorily water temperatures at different levels of the tank during cooling by standby heat loss. It is elucidated how the downward buoyancy driven flow along the tank wall is established by the heat loss from the tank sides and how the natural convection flow is influenced by water temperatures in the tank. When the temperature gradient in the tank is smaller than 2 K/m, there is a downward fluid velocity of 0.003–0.015 m/s. With the presence of thermal stratification the buoyancy driven flow is significantly reduced. The dependence of the velocity magnitude of the downward flow on temperature gradient is not influenced by the tank volume and is only slightly influenced by the tank height to tank diameter ratio. Based on results of the CFD calculations, an equation is determined to calculate the magnitude of the buoyancy driven flow along the tank wall for a given temperature gradient in the tank.

Jianhua Fan; Simon Furbo

2012-01-01T23:59:59.000Z

208

Heat transfer deterioration in tubes caused by bulk flow acceleration due to thermal and frictional influences  

SciTech Connect

Severe deterioration of forced convection heat transfer can be encountered with compressible fluids flowing through strongly heated tubes of relatively small bore as the flow accelerates and turbulence is reduced because of the fluid density falling (as the temperature rises and the pressure falls due to thermal and frictional influence). The model presented here throws new light on how the dependence of density on both temperature and pressure can affect turbulence and heat transfer and it explains why the empirical equations currently available for calculating effectiveness of forced convection heat transfer under conditions of strong non-uniformity of fluid properties sometimes fail to reproduce observed behaviour. It provides a criterion for establishing the conditions under which such deterioration of heat transfer might be encountered and enables heat transfer coefficients to be determined when such deterioration occurs. The analysis presented here is for a gaseous fluid at normal pressure subjected strong non-uniformity of fluid properties by the application of large temperature differences. Thus the model leads to equations which describe deterioration of heat transfer in terms of familiar parameters such as Mach number, Reynolds number and Prandtl number. It is applicable to thermal power plant systems such as rocket engines, gas turbines and high temperature gas-cooled nuclear reactors. However, the ideas involved apply equally well to fluids at supercritical pressure. Impairment of heat transfer under such conditions has become a matter of growing interest with the active consideration now being given to advanced water-cooled nuclear reactors designed to operate at pressures above the critical value. (authors)

Jackson, J. D. [Univ. of Manchester, Manchester (United Kingdom)

2012-07-01T23:59:59.000Z

209

High-Frequency Effect Due to the Axial Drift Velocity of a Plasma Column  

Science Journals Connector (OSTI)

The scattering of a plane electromagnetic wave with normal incidence (E field perpendicular to the axis) by a plasma column in the presence of a static magnetic induction B0 has been studied earlier. A heretofore unexplained effect, however, is the existence of a scattered axial field EZ even when B0=0. A mechanism responsible for this coupling between the EZ and the transverse E field, in the absence of B0, is investigated here, namely the role of an axial drift velocity vd. The effect observed is a resonance peak of EZ occurring at the same density for which there exists a resonance of the scattered transverse E field which is well explained by a uniform cold-plasma model. The same model is therefore assumed here. In this approximation the plasma can be described by a surface charge density ? due to the HF polarization which gives rise to a surface current density K=?vd. The boundary conditions then lead to the existence of an EZ which, for B0=0, has a sin? dependence when the exciting field has a cos? dependence. When B0?0, a more complicated theoretical spectrum is obtained. Both the position and the angular dependence of the resonances are in very good agreement with experimental data. The effect predicted by this model is, however, more than an order of magnitude below that observed in a mercury plasma column. This phenomenon can be described as the plasma radio-frequency analog of the static field induced by the Roentgen-Eichenwald current.

A. M. Messiaen and P. E. Vandenplas

1966-09-09T23:59:59.000Z

210

Measurement of building foundation and ground-borne vibrations due to surface trains and subways  

Science Journals Connector (OSTI)

Abstract Buildings located near surface trains and subways are subjected to surface train and subway-induced vibrations. Cutting edge technologies in laboratories and precision manufacturing facilities often include operation of vibration sensitive equipment. Human comfort in the form of feelable vibrations and audible noise in residential and office buildings is also a concern. It is thus imperative to reduce these vibrations inside buildings to acceptable levels with the design of an efficient vibration mitigation system. Incorporation of a vibration mitigation system in a building in design phase requires prior understanding and characterization of subway and surface train-induced base excitations of buildings before and after the construction of a structure to meet serviceability criteria. The vibrations measured at the foundation slab of buildings serve as the base excitation for the building and transmit to the to upper floor levels through columns. The focus of this paper is to quantify the amplitudes and frequency contents of vibration level measured at foundation slab and compare these vibration measurements inside the building at foundation level with the open field measurements. In this context, an exploration of ground-borne vibration characteristics was performed at six sites in the Boston area. Three sites were selected for measuring train-induced vibration and another three were considered for subway-induced vibration study. Vibration measurements were performed on the building foundation slab as well as in open fields adjacent to the building. These vibration measurements were quantified and compared. It was found that in the case of surface train-induced building vibrations, open field vibration levels can be conservatively used in the design of buildings. However due to inconsistency in observations, a similar conclusion was not drawn for the case of subway-induced building vibration. This paper also provides the bases that would allow the designer to estimate the vibration levels in sensitive locations within the building. These estimated levels determine the extent to which mitigation is required to meet vibration criteria.

Masoud Sanayei; Pradeep Maurya; James A. Moore

2013-01-01T23:59:59.000Z

211

EFFECT ON 105KW NORTH WALL DUE TO ADDITION OF FILTRATION SYSTEM  

SciTech Connect

CHPRC D&D Projects is adding three filtration system on two 1-ft concrete pads adjacent to the north side of existing KW Basin building. This analysis is prepared to provide qualitative assessment based on the review of design information available for 105KW basin substructure. In the proposed heating, ventilation and air conditioning (HVAC) filtration pad designs a 2 ft gap will be maintained between the pads and the north end of the existing 1 05KW -Basin building. Filtration Skids No.2 and No.3 share one pad. It is conservative to evaluate the No.2 and No.3 skid pad for the wall assessment. Figure 1 shows the plan layout of the 105KW basin site and the location of the pads for the filtration system or HVAC skids. Figure 2 shows the cross-section elevation view of the pad. The concrete pad Drawing H-1-91482 directs the replacement of the existing 8-inch concrete pad with two new 1-ft think pads. The existing 8-inch pad is separated from the 105KW basin superstructure by an expansion joint of only half an inch. The concrete pad Drawing H-1-91482 shows the gap between the new proposed pads and the north wall and any overflow pits and sumps is 2-ft. Following analysis demonstrates that the newly added filtration units and their pads do not exceed the structural capacity of existing wall. The calculation shows that the total bending moment on the north wall due to newly added filtration units and pads including seismic load is 82.636 ft-kip/ft and is within the capacity of wall which is 139.0ft-kip/ft.

CHO CS

2010-03-08T23:59:59.000Z

212

Wolf-Rayet Mass-Loss Limits Due to Frequency Redistribution  

E-Print Network (OSTI)

The hypothesis that CAK-type line driving is responsible for the large observed Wolf-Rayet (W-R) mass-loss rates has been called into question in recent theoretical studies. The purpose of this paper is to reconsider the plausibility of line driving of W-R winds within the standard approach using the Sobolev approximation while advancing the conceptual understanding of this topic. Due to the multiple scattering required in this context, of particular importance is the role of photon frequency redistribution into spectral gaps, which in the extreme limit yields the statistical Sobolev-Rosseland (SSR) mean approximation. Interesting limits to constrain are the extremes of no frequency redistribution, wherein the small radii and corresponding high W-R surface temperature induces up to twice the mass-loss rate relative to cooler stars, and the SSR limit, whereby the reduced efficiency of the driving drops the mass flux by as much as an order of magnitude whenever there exist significant gaps in the spectral line distribution. To see how this efficiency drop might be sufficiently avoided to permit high W-R mass loss, we explore the suggestion that ionization stratification may serve to fill the gaps globally over the wind. We find that global ionization changes can only fill the gaps sufficiently to cause about a 25% increase in the mass-loss rate over the local SSR limit. Higher temperatures and more ionization states (especially of iron) may be needed to achieve optically thick W-R winds, unless strong clumping corrections eliminate the need for such winds.

Andrew J. Onifer; Kenneth G. Gayley

2005-10-13T23:59:59.000Z

213

Envisioning carbon capture and storage: expanded possibilities due to air capture, leakage insurance, and C-14 monitoring  

Science Journals Connector (OSTI)

In order to meet the challenge of climate change while allowing for continued economic development, the world will have to adopt a net zero carbon energy infrastructure. Due to the world’s ... is strong motivatio...

Klaus S. Lackner; Sarah Brennan

2009-10-01T23:59:59.000Z

214

Fatigue failure in thin-film polycrystalline silicon is due to subcritical cracking within the oxide layer  

E-Print Network (OSTI)

Fatigue failure in thin-film polycrystalline silicon is due to subcritical cracking within with stress-induced surface oxide thicken- ing and moisture-assisted subcritical cracking in the amor- phous

Ritchie, Robert

215

Climate sensitivity of tropical and subtropical marine low cloud amount to ENSO and global warming due to doubled CO2  

E-Print Network (OSTI)

due to doubled CO2 Ping Zhu,1 James J. Hack,2 Jeffrey T. Kiehl,2 and Christopher S. Bretherton3 formation. Citation: Zhu, P., J. J. Hack, J. T. Kiehl, and C. S. Bretherton (2007), Climate sensitivity

Bretherton, Chris

216

Due to hardware limitations dur-ing the first 20-year-span of life of the  

E-Print Network (OSTI)

NEXRAD Now Due to hardware limitations dur- ing the first 20-year-span of life of the WSR-88D) and RDA (Radar Data Acquisition) hardware upgrades, an on-going effort to migrate to modern process- ing

217

Identification of anomalous radon concentrations due to geodynamic processes by elimination of Rn variations caused by other factors  

Science Journals Connector (OSTI)

......dissolved in underground water (Mishel 1987...fluctuations in atmospheric pressure (Dowell...usually a major generator of radon in underground...convection due to lower atmospheric heating. Towards...the underground water, at Fuchu Observatory......

M. Finkelstein; S. Brenner; L. Eppelbaum; E. Ne'Eman

1998-05-01T23:59:59.000Z

218

Deviation of Stellar Orbits from Test Particle Trajectories around Sgr A* Due to Tides and Winds  

Science Journals Connector (OSTI)

Monitoring the orbits of stars around Sgr A* offers the possibility of detecting the precession of their orbital planes due to frame dragging, of measuring the spin and quadrupole moment of the black hole, and of testing the no-hair theorem. Here we investigate whether the deviations of stellar orbits from test-particle trajectories due to wind mass loss and tidal dissipation of the orbital energy compromise such measurements. We find that the effects of stellar winds are, in general, negligible. On the other hand, for the most eccentric orbits (e > 0.96) for which an optical interferometer, such as GRAVITY, will detect orbital plane precession due to frame dragging, the tidal dissipation of orbital energy occurs at timescales comparable to the timescale of precession due to the quadrupole moment of the black hole. As a result, this non-conservative effect is a potential source of systematic uncertainty in testing the no-hair theorem with stellar orbits.

Dimitrios Psaltis; Gongjie Li; Abraham Loeb

2013-01-01T23:59:59.000Z

219

Natural radioactivity in groundwater and estimates of committed effective dose due to water ingestion in the state of Chihuahua (Mexico)  

Science Journals Connector (OSTI)

......effective dose due to water ingestion in the state of Chihuahua (Mexico) L. Villalba 1 M. E. Montero-Cabrera...C. Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua, C.P. 31109, Chih., Mexico 2 Departamento......

L. Villalba; M. E. Montero-Cabrera; G. Manjón-Collado; L. Colmenero-Sujo; M. Rentería-Villalobos; A. Cano-Jiménez; A. Rodríguez-Pineda; I. Dávila-Rangel; L. Quirino-Torres; E. F. Herrera-Peraza

2006-12-01T23:59:59.000Z

220

Introduction Due to the demand for efficiency in turbomachinery, the clearance between the casing and the blades  

E-Print Network (OSTI)

Introduction Due to the demand for efficiency in turbomachinery, the clearance between the casing of Turbomachinery Wear Simulations SURE 2011 Project by Grégoire Martin, supervised by Dr. Christophe Pierre and Dr

Barthelat, Francois

Note: This page contains sample records for the topic "unscheduled downtime due" 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

Analysis of linear elasticity and non-linearity due to plasticity and material damage in woven and biaxial braided composites  

E-Print Network (OSTI)

Textile composites have a wide variety of applications in the aerospace, sports, automobile, marine and medical industries. Due to the availability of a variety of textile architectures and numerous parameters associated with each, optimal design...

Goyal, Deepak

2009-05-15T23:59:59.000Z

222

Advanced hepatic fibrosis and cirrhosis due to nonalcoholic fatty liver disease in Sri Lankan children: a preliminary report  

Science Journals Connector (OSTI)

Nonalcoholic fatty liver disease (NAFLD) is one of the most common chronic liver diseases and may progress to advanced hepatic fibrosis and cirrhosis in some patients. Cirrhosis due to NAFLD is considered extr...

S. Rajindrajith; A. S. Dassanayake; J. Hewavisenthi…

2008-06-01T23:59:59.000Z

223

Fact #775: April 15, 2013 Top Ten Urban Areas for Fuel Wasted due to Traffic Congestion, 2011  

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

The top ten urban areas across the U.S. accounted for nearly 40% of the total fuel wasted due to traffic congestion in 2011. Highway congestion caused vehicles in the combined urban areas of New...

224

Young-onset dementia and MRI changes in a patient with subclinical liver cirrhosis due to chronic hepatitis C  

Science Journals Connector (OSTI)

Young-onset dementia (before age of 65) is relatively infrequent and presents a challenge in everyday neurological practice due to wide spectrum of clinical presentations and diversity of underlying etiology. ...

Marina Boban; Branko Maloj?i?

2011-12-01T23:59:59.000Z

225

Comment on"Air Emissions Due to Wind and Solar Power" and Supporting Information  

SciTech Connect

Katzenstein and Apt investigate the important question of pollution emission reduction benefits from variable generation resources such as wind and solar. Their methodology, which couples an individual variable generator to a dedicated gas plant to produce a flat block of power is, however, inappropriate. For CO{sub 2}, the authors conclude that variable generators 'achieve {approx} 80% of the emission reductions expected if the power fluctuations caused no additional emissions.' They find even lower NO{sub x} emission reduction benefits with steam-injected gas turbines and a 2-4 times net increase in NO{sub x} emissions for systems with dry NO{sub x} control unless the ratio of energy from natural gas to variable plants is greater than 2:1. A more appropriate methodology, however, would find a significantly lower degradation of the emissions benefit than suggested by Katzenstein and Apt. As has been known for many years, models of large power system operations must take into account variable demand and the unit commitment and economic dispatch functions that are practiced every day by system operators. It is also well-known that every change in wind or solar power output does not need to be countered by an equal and opposite change in a dispatchable resource. The authors recognize that several of their assumptions to the contrary are incorrect and that their estimates therefore provide at best an upper bound to the emissions degradation caused by fluctuating output. Yet they still present the strong conclusion: 'Carbon dioxide emissions reductions are likely to be 75-80% of those presently assumed by policy makers. We have shown that the conventional method used to calculate emissions is inaccurate, particularly for NO{sub x} emissions.' The inherently problematic methodology used by the authors makes such strong conclusions suspect. Specifically, assuming that each variable plant requires a dedicated natural gas backup plant to create a flat block of power ignores the benefits of diversity. In real power systems, operators are required to balance only the net variations of all loads and all generators, not the output of individual loads or generators; doing otherwise would ensure an enormous amount of unnecessary investment and operating costs. As a result, detailed studies that aggregate the variability of all loads and generators to the system level find that the amount of operating reserves required to reliably integrate variable resources into the grid are on the order of 10% of the nameplate capacity of the variable generators, even when upto25%of gross demand is being met by variable generation. The authors implicit assumption that incremental operating reserves must be 100% of the nameplate capacity of the variable generation, and be available at all times to directly counter that variability, excludes the option of decommitting conventional units when the load net of variable generation is low. In real power systems, generation response to wind variation can typically be met by a combination of committed units, each operating at a relatively efficient point of their fuel curves. In the Supporting Information, we conceptually demonstrate that the CO{sub 2} and NO{sub x} efficiency penalty found by the authors can be significantly reduced by considering the unit commitment decision with just five plants. Real systems often have tens to hundreds of plants that can be committed and decommitted over various time frames. Ignoring the flexibility of the unit commitment decision therefore leads to unsupportable results. Anumber of analyses of the fuel savings and CO{sub 2} emission benefits of variable generation have considered realistic operating reserve requirements and unit commitment decisions in models that include the reduction in part load efficiency of conventional plants. The efficiency penalty due to the variability of wind in four studies considered by Gross et al. is negligible to 7%, for up to a 20% wind penetration level. In short, for moderate wind penetration levels, 'there is no evidence available to

Mills, Andrew D.; Wiser, Ryan H.; Milligan, Michael; O'Malley, Mark

2009-03-18T23:59:59.000Z

226

Multi-GeV neutrinos due to neutro anti-neutron oscillation in Gamma-Ray Burst Fireballs  

E-Print Network (OSTI)

The long and short gamma-ray bursts are believed to be produced due to collapse of massive stars and merger of compact binaries respectively. All these objects are rich in neutron and the jet outflow from these objects must have a neutron component in it. By postulating the neutron anti-neutron oscillation in the gamma-ray burst fireball, we show that, 19-38 GeV neutrinos and anti-neutrinos can be produced due to annihilation of anti-neutrons with the background neutrons. These neutrinos and anti-neutrinos will be produced before the 5-10 GeV neutrinos due to dynamical decoupling of neutrons from the rest of the fireball. Observation of these neutrinos will shed more light on the nature of the GRB progenitors and also be a unique signature of physics beyond the standard model. A possible way of detecting these neutrinos in future is also discussed.

Sarira Sahu

2007-02-27T23:59:59.000Z

227

A Numerical Algorithm to Calculate the Pressure Distribution of the TPS Front End Due to Desorption Induced by Synchrotron Radiation  

SciTech Connect

The pressure distribution is an important aspect of a UHV subsystem in either a storage ring or a front end. The design of the 3-GeV, 400-mA Taiwan Photon Source (TPS) foresees outgassing induced by photons and due to a bending magnet and an insertion device. An algorithm to calculate the photon-stimulated absorption (PSD) due to highly energetic radiation from a synchrotron source is presented. Several results using undulator sources such as IU20 are also presented, and the pressure distribution is illustrated.

Sheng, I. C.; Kuan, C. K.; Chen, Y. T.; Yang, J. Y.; Hsiung, G. Y.; Chen, J. R. [National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 20076, Taiwan (China)

2010-06-23T23:59:59.000Z

228

Fault detection and diagnosis within a wind turbine mechanical braking system using condition monitoring  

Science Journals Connector (OSTI)

Renewable energy sources have a key role to play in the global energy mix as a means of reducing the impact of energy production on climate change. Wind energy is the most developed of all renewable energy technologies with more than 200 GW of globally installed capacity as of 2011. Analyses of wind farm maintenance costs show that up to 40% of the outlay is related to unexpected component failures that lead to costly unscheduled amendments. Wind farm operators are constantly looking for new technological developments in condition monitoring that can contribute to the minimisation of wind turbine maintenance expenditure. Early fault detection through condition monitoring can help prevent major breakdowns as well as significantly decrease associated costs. Moreover it enables the optimisation of maintenance schedules, reduces downtime, increases asset availability and enhances safety and operational reliability. Faults in the braking system are of particularly concern since they can result in catastrophic failure of the wind turbine. The present study investigates online condition monitoring based on voltages and currents for mechanical wind turbine brake system fault diagnosis.

M. Entezami; S. Hillmansen; P. Weston; M.Ph. Papaelias

2012-01-01T23:59:59.000Z

229

Large-scale perturbations due to a small-scale instability in a finite-conductivity plasma  

SciTech Connect

By considering kink modes in a plasma cylinder in a strong axial magnetic field as an example, it is demonstrated that, because of the finite plasma conductivity (the finite longitudinal plasma permittivity {epsilon}{sub parallel}), large-scale perturbations can grow with time due to a small-scale instability that develops near a certain magnetic surface.

Arsenin, V. V. [Russian Research Centre Kurchatov Institute, Nuclear Fusion Institute (Russian Federation)

2007-01-15T23:59:59.000Z

230

Bayesian models for elevated disease risk due to exposure to uranium mine and mill waste on the Navajo Nation  

E-Print Network (OSTI)

ForReview Only Bayesian models for elevated disease risk due to exposure to uranium mine and mill of Pharmacy, Community Environmental Health Program Keywords: abandoned uranium mines, conditionally specified to ex- posure to uranium mine and mill waste on the Navajo Nation Glenn A. Stark University of New

Huerta, Gabriel

231

Is the Extended Red Emission due to CO? Philip D. Bennett, Graham M. Harper, and Alexander Brown  

E-Print Network (OSTI)

Is the Extended Red Emission due to CO? Philip D. Bennett, Graham M. Harper, and Alexander Brown. The Extended Red Emission (ERE) is a broad emission feature ob­ served between 5000 and 8000 š A in a large to be correct. The strongest known source of the ERE is the bipolar nebula (the ``Red Rect­ angle'') associated

Harper, Graham

232

Abstract--Electrical Distribution Systems (EDS) are facing ever-increased complexity due, in part, to fast growing consumer  

E-Print Network (OSTI)

. As such Electrical Distribution Systems will require new planning strategies and tools, new design methodologies1 Abstract-- Electrical Distribution Systems (EDS) are facing ever-increased complexity due, in part, to fast growing consumer demands and the integration of large amounts of distributed energy

Paris-Sud XI, Université de

233

Abstract--Electrical Distribution Systems (EDS) are facing ever-increasing complexity due to fast growing demand and large  

E-Print Network (OSTI)

operation. As such Electrical Distribution Systems will require new planning strategies and tools, new1 Abstract-- Electrical Distribution Systems (EDS) are facing ever-increasing complexity due to fast growing demand and large amount of distributed energy resources integration. The conventional

Paris-Sud XI, Université de

234

Fluid Statics When the fluid velocity is zero, called the hydrostatic condition, the pressure variation is due only to the  

E-Print Network (OSTI)

and zdirections can be calculated. The total net force vector, due to pressure, is: Notice that the termFluid Statics When the fluid velocity is zero, called the hydrostatic condition, the pressure the element is at rest, summation of all forces must equal zero. 0 0 1 2 From geometry, . After

Bahrami, Majid

235

Abstract-The control of the hand in primate species is characterized by a high dimensionality, due to the large  

E-Print Network (OSTI)

neurobiological findings. We further develop a computational model, consisting of several brain areas related-grasp tasks are considered quite interesting, due to the diverge roles of the collaborating brain regions each joint individually, seems rather redundant. Recent studies in neurobiology indicate that our brain

Trahanias, Panos

236

Identification of anomalous radon concentrations due to geodynamic processes by elimination of Rn variations caused by other factors  

Science Journals Connector (OSTI)

......concentrations due to geodynamic processes by elimination of Rn variations...number of different physical processes including seismic activity...Ulomov V.I., 1972The processes preceding strong earthquakes...Arad region,Trans. Ann. Mtg Israel geol. Soc., Ashqelon......

M. Finkelstein; S. Brenner; L. Eppelbaum; E. Ne'Eman

1998-05-01T23:59:59.000Z

237

Abstract--3D IC technologies have recently attracted great attention due to the potential performance improvement, power  

E-Print Network (OSTI)

Abstract--3D IC technologies have recently attracted great attention due to the potential a 3D physical design flow based on OpenAccess (named 3D-Craft) to facilitate the rapid adoption of 3D IC technologies. The OpenAccess extension for 3D-Craft is discussed, and the key components including

Cong, Jason "Jingsheng"

238

Cluster Report or Survey Description Date due to IEA Responsible person(s) Comments Summer Activity Report  

E-Print Network (OSTI)

Cluster Report or Survey Description Date due to IEA Responsible person(s) Comments Summer Activity Report Activity reports for Summer, 2013 January 31, 2014 Academic Department Heads By December 13, 2013, data is provided by IEA for report completion. Fall Activity Report Activity reports for Fall, 2013

Fernandez, Eduardo

239

Abstract 5150: FJX1 is an important mediator of tumor biology due, in part, to its effect ontumor vascularization  

Science Journals Connector (OSTI)

...FJX1 is an important mediator of tumor biology due, in part, to its effect ontumor vascularization Nicole Al-Greene 1 Pengcheng Lu 1 Jinghuan Zi 1 Aixiang Jiang 1 Yu Shyr 1 Natasha Deane 1 R. Daniel Beauchamp 1 1Vanderbilt, Nashville, TN. The underlying...

Nicole Al-Greene; Pengcheng Lu; Jinghuan Zi; Aixiang Jiang; Yu Shyr; Natasha Deane; R. Daniel Beauchamp

2011-07-12T23:59:59.000Z

240

ABSTRACT: Water resource management in West Africa is often a complicated process due to inadequate resources, climatic  

E-Print Network (OSTI)

in the Volta River Basin include high popu- lation densities, population growth rate, poverty, watershed sizeABSTRACT: Water resource management in West Africa is often a complicated process due to inadequate Basin, West Africa.) Taylor, Joie C., Nick van de Giesen, and Tammo S. Steenhuis, 2006. West Africa

Walter, M.Todd

Note: This page contains sample records for the topic "unscheduled downtime due" 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

0-7803-7724-9/03/$17.00 2003 IEEE 500 Abstract Due to their unpredictable nature, collaboration  

E-Print Network (OSTI)

0-7803-7724-9/03/$17.00 © 2003 IEEE 500 Abstract Due to their unpredictable nature, collaboration activities are rarely supported by a single CSCW technology. Then different types of collaborative applications are usually applied in order to support group work such as collaborative e- learning. But in spite

Hoyos Rivera, Guillermo de Jesús

242

French vertical flow constructed wetlands: reed bed behaviour and limits due to hydraulic overloading on first stage filters  

E-Print Network (OSTI)

French vertical flow constructed wetlands: reed bed behaviour and limits due to hydraulic with the European standards. Keywords: Vertical flow constructed wetlands; hydraulic overload; hydraulic behaviour. INTRODUCTION Vertical flow constructed wetlands (VFCWs) have been very successful in France over the last five

Paris-Sud XI, Université de

243

The photoelastic and mathematical determination of the stresses in a cantilever beam due to a concentrated force  

E-Print Network (OSTI)

THE PHOTOELASTIC AND MATHEMATICAL DETERMINATION OF THE STRESSES IN A CANTILEVER BEAM DUE TO A CONCENTRATED FORCE A Thesis By DONALD FRANK BOREN Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial... FRANK BOREN Approved as to style and content by: Chairman of Co ttee Head of Department May 1962 ACKNOWLEDGMENTS I am grateful to Professor R. M. Wingren for suggesting this problem and for supervising this research. Thanks are also expressed...

Boren, Donald Frank

1962-01-01T23:59:59.000Z

244

An evaluation of elemental mercury vapor exposure to children due to silver-mercury dental amalgam restorations  

E-Print Network (OSTI)

AN EVALUATION OF ELEMENTAL MERCURY VAPOR EXPOSURE TO CHILDREN DUE TO SILVER-MERCURY DENTAL AMALGAM RESTORATIONS A Thesis By RONALD DALE TAYLOR Submitted to the Office of Graduate Studies College Texas A&M University in partial fulfillment.... . . . . 1X LIST OF FIGURES. I. INTRODUCTION. II ' LITERATURE REVIEW Dental Mercury Toxicology Body Burden. Inhalation Exposure. Childhood Exposure III. METHODOLOGY. . . . 3 5 . . . 8 . . . 10 . . . 14 . 16 Human Research Committee...

Taylor, Ronald Dale

1989-01-01T23:59:59.000Z

245

Use of EMCS Recorded Data to Identify Potential Savings Due to Improved HVAC Operations & Maintenance (O&M)  

E-Print Network (OSTI)

Use of EMCS Recorded Data to Identify Potential Savings Due to Improved HVAC Operations & Maintenance(O&M) Mingsheng Liu, Yeqiao Zhu, and David Claridge Energy Systems Laboratory Texas A&M University ABSTRACT In most chiller and boiler central... and cooling energy consumption using an appropriate model [Liu 1995, Liu and Claridge 19951 with the bin weather data for each building. Step 5: Calculate the campus consumption as the sum of consumption of all buildings. Step 6: Compare the simulated...

Liu, M.; Zhu, Y.; Claridge, D. E.

1996-01-01T23:59:59.000Z

246

Changes in ecosystem services and runoff due to land use change in the watersheds of San Antonio, Texas  

E-Print Network (OSTI)

services. Barbier (1994) identified wetland ecosystem services as prevention of storm damage, flood and water flow control, support of fisheries, nutrient and waste absorption, recreation and water transport, agriculture, wildlife products, wood products...CHANGES IN ECOSYSTEM SERVICES AND RUNOFF DUE TO LAND USE CHANGE IN THE WATERSHEDS OF SAN ANTONIO, TEXAS A Thesis by HEATHER GRACE HARRIS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment...

Harris, Heather Grace

2000-01-01T23:59:59.000Z

247

Evaluation of the electromagnetic effects due to direct lighting to nuclear explosive areas at Pantex. Final report  

SciTech Connect

This report summarizes the effort to quantify the electromagnetic environments in the nuclear explosive areas at Pantex due to direct lightning. The fundamental measure of the threat to nuclear safety is assumed to be the maximum voltage between any two points in an assembly area, which is then available for producing arcing or for driving current into critical subsystems of a nuclear weapon. This maximum voltage has been computed with simple analytical models and with three-dimensional finite-difference computer codes.

Merewether, K.O.; Chen, K.C.

1993-11-01T23:59:59.000Z

248

"Carbon emission offsets for aviation-generated emissions due to international travel to and from New Zealand" revised personal version of paper to appear in Energy Policy (in  

E-Print Network (OSTI)

"Carbon emission offsets for aviation-generated emissions due to international travel to and from.1016/j.enpol.2008.10.046 1 CARBON EMISSION OFFSETS FOR AVIATION-GENERATED EMISSIONS DUE TO INTERNATIONAL. It is then shown that no single #12;"Carbon emission offsets for aviation-generated emissions due to international

Otago, University of

249

Water quality improvements in the Upper North Bosque River watershed due to phosphorous export through turfgrass sod  

E-Print Network (OSTI)

.S., Texas A&M University Chair of Advisory Committee: Dr. Clyde L. Munster The Upper North Bosque River (UNBR) watershed is under a Total Maximum Daily Load (TMDL) mandate to reduce Phosphorus (P) due to excess nutrients in the watershed. To address... of the manure applied P. Plot and field scale research has demonstrated the effectiveness of turfgrass to remove manure phosphorus (P). In order to assess the impact of the turfgrass BMP on a watershed scale, the Soil and Water Assessment Tool (SWAT) was used...

Stewart, George Russell

2005-02-17T23:59:59.000Z

250

Fuel mass penalty due to generators and fuel cells as energy source of the all-electric aircraft  

Science Journals Connector (OSTI)

The paper presents the results of an assessment of the fuel mass penalty due to generators and fuel cell systems. Based on the simulation tool SysFuel, fuel mass penalties for different mission ranges and fuel cell architectures are calculated and compared to a conventional reference architecture. Different fuel cell architectures using ram air or cabin exhaust air and different options of energy recovery are considered. As a result of the studies, target values are presented for the mass to power ratio of fuel cell systems to achieve fuel mass reductions compared to conventional generator and auxiliary power unit systems.

Jürgen Dollmayer; Nicola Bundschuh; Udo B. Carl

2006-01-01T23:59:59.000Z

251

Exploration of Quench Initiation Due to Intentional Geometrical Defects in a High Magnetic Field Region of an SRF Cavity  

SciTech Connect

A computer program which was used to simulate and analyze the thermal behaviors of SRF cavities has been developed at Jefferson Lab using C++ code. This code was also used to verify the quench initiation due to geometrical defects in high magnetic field region of SRF cavities. We built a CEBAF single cell cavity with 4 artificial defects near equator, and this cavity has been tested with T-mapping. The preheating behavior and quench initiation analysis of this cavity will be presented here using the computer program.

J. Dai, K. Zhao, G.V. Eremeev, R.L. Geng, A.D. Palczewski; Dai, J. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Palczewski, A. D. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Eremeev, G. V. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Geng, R. L. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Zhao, K. [Institute of Heavy Ion Physics, Peking University, Beijing (China)

2011-07-01T23:59:59.000Z

252

Effects of eddy currents due to a vacuum chamber wall in the airgap of a moving-magnet linear actuator  

SciTech Connect

This paper discusses the effects of eddy currents induced in an electrically conducting plate which is placed in the airgap of a linear synchronous actuator with moving permanent magnets. The eddy currents induced in this plate, which is part of a controlled atmosphere chamber, cause not only damping but also deteriorate the actuator performance by disturbing the position measurement with Hall sensors. Furthermore, feed-forward controllers are less effective due to the suppression of high frequent armature fields. These effects are analyzed with an analytical model and verified with finite element simulations and measurements.

Jansen, J. W.; Lomonova, E. A.; Rovers, J. M. M. [Department of Electrical Engineering, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven (Netherlands)

2009-04-01T23:59:59.000Z

253

Observation of a plateau electron distribution function due to electron cyclotron heating for an efficient plug potential formation  

Science Journals Connector (OSTI)

A plateau-shaped electron distribution function is observed when an electrostatic electron-trapping potential is formed by the electron cyclotron heating (ECH) in the plug region of the GAMMA 10 tandem mirror. Also, a remarkable thermal isolation effect due to a kV-range thermal barrier is observed along with the difference between distribution functions in thermally separated regions. These new findings as well as the relation between ion-confining potentials and thermal-barrier potentials in the kV range consistently support the validity of Cohen’s strong ECH theory.

T. Cho; M. Hirata; K. Ogura; E. Takahashi; T. Kondoh; N. Yamaguchi; K. Masai; K. Hayashi; I. Katanuma; K. Ishii; T. Saito; Y. Kiwamoto; K. Yatsu; S. Miyoshi

1990-03-19T23:59:59.000Z

254

Estimating life-cycle monetary losses due to wind hazards: Fragility analysis of long-span bridges  

Science Journals Connector (OSTI)

Abstract A numerical framework was developed for estimating the life-cycle monetary losses (maintenance and repair costs) due to wind-induced damage on a long-span bridge. The wind loading on the bridge deck was evaluated by means of flutter derivatives (FDs), which are measured in a wind tunnel test on a section-model of the deck. These aeroelastic coefficients are random due to experimental errors. A statistical approach was employed to evaluate the effects of this uncertainty source on the wind-induced response and the damage produced on the structure. In the first part of the study “fragility curves and surfaces” were used to estimate the exceedance probability of representative structural performance threshold indicators by accounting for experimental errors in the estimation of FDs. These thresholds were based on deck acceleration (for user comfort) and peak deck displacements (for structural damage). In the second part the results of the initial fragility analysis were used to analyze monetary losses, produced by wind loading. The proposed model for cost analysis was adapted from an existing life-cycle simulation algorithm for earthquake hazards. The pilot study employs a 1200-m suspension bridge model and data from wind tunnel experiments conducted at Northeastern University in the United States.

Dong-Woo Seo; Luca Caracoglia

2013-01-01T23:59:59.000Z

255

Finite element modeling of the temperature rise due to the propagation of ultrasonic waves in viscoelastic materials and experimental validation  

Science Journals Connector (OSTI)

The ultrasound stimulated thermography method is usually used to detect the temperature rise at a defect position. The temperature rise can be due to the friction between the edges of the defect and/or the plastic deformation around the defect. This paper presents another aspect of the method when the ultrasounds are propagating in a viscoelasticanisotropicmaterial such as polymers or fiber-reinforced polymers. The attenuation of the waves produces a distributed temperature field. Therefore even a defect that does not produce some heat can be detected the ultrasonic field is modified. A finite element model is used for computing the temperature field and for predicting the possibility for an infrared camera of detecting the temperature rise and its modification due to a defect. The model computes the stress and displacement fields associated with the propagation and the loss of energy. Then the heat equation is solved with this loss as a source of heating. An experiment is done with a sonotrode that excites a PVC plate. The ultrasonic displacement at the top of the plate is measured with a laser velocimeter and introduced in the model. Finally the model result is compared to the image produced by the camera.

B. Hosten; C. Bacon; C. Biateau

2008-01-01T23:59:59.000Z

256

Predicting underwater radiated noise levels due to the first offshore wind turbine installation in the United States  

Science Journals Connector (OSTI)

Noise generated by offshore impact pile driving radiates into the air water and sediment. Predicting noise levels around the support structures at sea is required to estimate the effects of the noise on marine life. Based on high demands developing renewable energy source the United States will begin the first pile driving within one to two years. It is necessary to investigate acoustic impact using our previously verified coupled Finite Element (Commercial FE code Abaqus) and Monterey Miami Parabolic Equation (2D MMPE) models [J. Acoust. Soc. Am. 131(4) 3392 (2012)]. In the present study we developed a new coupled FE-MMPE model for the identification of zone of injury due to offshore impact pile driving. FE analysis produced acoustic pressure outputs on the surface of the pile which are used as a starting field for a long range 2D MMPE propagation model. It calculates transmission loss for N different azimuthal directions as function of distance from the location of piling with the inputs of corresponding bathymetry and sediment properties. We will present predicted zone of injury by connecting N different distances of equivalent level fishes may get permanent injury due to the first offshore wind farm installation in the United States.

James H. Miller

2013-01-01T23:59:59.000Z

257

Predicting underwater radiated noise levels due to the first offshore wind turbine installation in the U.S.  

Science Journals Connector (OSTI)

Noise generated by offshore impact pile driving radiates into the air water and sediment. Predicting noise levels around the support structures at sea is required to estimate the effects of the noise on marine life. Based on high demands developing renewable energy source the United States will begin the first pile driving within one to two years. It is necessary to investigate acoustic impact using our previously verified coupled Finite Element (Commercial FE code Abaqus) and Monterey Miami Parabolic Equation (2D MMPE) models (J. Acoust. Soc. Am. 131(4) p. 3392 2012). In the present study we developed a new coupled FE-MMPE model for the identification of zone of injury due to offshore impact pile driving. FE analysis produced acoustic pressure outputs on the surface of the pile which are used as a starting field for a long range 2D MMPE propagation model. It calculates transmission loss for N different azimuthal directions as function of distance from the location of piling with the inputs of corresponding bathymetry and sediment properties. We will present predicted zone of injury by connecting N different distances of equivalent level fishes may get permanent injury due to the first offshore wind farm installation in the U.S..

Huikwan Kim; James H. Miller; Gopu R. Potty

2013-01-01T23:59:59.000Z

258

Role of relative humidity in concrete expansion due to alkali-silica reaction and delayed ettringite formation: relative humidity thresholds, measurement methods, and coatings to mitigate expansion.  

E-Print Network (OSTI)

??Premature concrete deterioration due to alkali-silica reaction (ASR) and delayed ettringite formation (DEF) is a significant problem all over the world. In cases where these… (more)

Rust, Charles Karissa

2009-01-01T23:59:59.000Z

259

Microsoft Word - Lab call doc TEMPLATE ver 11.3 _may 3rd due date_.docx  

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

RESEARCH CALL TO DOE/FEDERAL LABORATORIES RESEARCH CALL TO DOE/FEDERAL LABORATORIES Technical Support for Interconnection-Level Electric Infrastructure Planning RC-BM-2010 CONTACT: Brian Mollohan, Project Manager TELEPHONE NUMBER: (304) 285-1367 FAX NUMBER: (304) 285-4403 E-MAIL: brian.mollohan@netl.doe.gov ISSUING OFFICE: U.S. DEPARTMENT OF ENERGY National Energy Technology Laboratory 3610 Collins Ferry Road, P. O. Box 880 Morgantown, WV 26507-0880 ISSUE DATE: April 1, 2010 DUE DATE: May 3, 2010 This Research Call uses funding from "The American Recovery and Reinvestment Act of 2009" and will be subject to special reporting requirements. The reporting requirements and other details will be provided later. 2 TABLE OF CONTENTS SECTION I - GENERAL INFORMATION

260

Microsoft Word - Lab call doc TEMPLATE ver 11.3 _may 3rd due date_.docx  

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

RESEARCH CALL TO DOE/FEDERAL LABORATORIES RESEARCH CALL TO DOE/FEDERAL LABORATORIES Technical Support for Interconnection-Level Electric Infrastructure Planning RC-BM-2010 CONTACT: Brian Mollohan, Project Manager TELEPHONE NUMBER: (304) 285-1367 FAX NUMBER: (304) 285-4403 E-MAIL: brian.mollohan@netl.doe.gov ISSUING OFFICE: U.S. DEPARTMENT OF ENERGY National Energy Technology Laboratory 3610 Collins Ferry Road, P. O. Box 880 Morgantown, WV 26507-0880 ISSUE DATE: April 1, 2010 DUE DATE: May 3, 2010 This Research Call uses funding from "The American Recovery and Reinvestment Act of 2009" and will be subject to special reporting requirements. The reporting requirements and other details will be provided later. 2 TABLE OF CONTENTS SECTION I - GENERAL INFORMATION

Note: This page contains sample records for the topic "unscheduled downtime due" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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to obtain the most current and comprehensive results.


261

Ignition of Deflagration and Detonation Ahead of the Flame due to Radiative Preheating of Suspended Micro Particles  

E-Print Network (OSTI)

We study a flame propagating in the gaseous combustible mixture with suspended inert solid micro particles. The gaseous mixture is assumed to be transparent for thermal radiation emitted by the hot combustion products, while particles absorb and reemit the radiation. Thermal radiation heats the particles, which in turn transfer the heat to the surrounding unburned gaseous mixture by means of thermal heat transfer. Different scenarios are possible depending on the spatial distribution of the particles, their size and the number density. In the case of uniform spatial distribution the radiation absorption ahead of the flame causes a modest increase of the combustion wave velocity. On the contrary, in the case of non-uniform distribution of the particles, such that the particles number density increases far ahead of the flame, the preheating caused by the thermal radiation may trigger additional source of ignition. Far enough ahead of the flame, where number density of particles is higher, the temperature due to...

Ivanov, M F; Liberman, M A

2014-01-01T23:59:59.000Z

262

Magnetic Field Decay Due to the Wave-Particle Resonances in the Outer Crust of the Neutron Star  

E-Print Network (OSTI)

Bearing in mind the application to the outer crust of the neutron stars (NSs), we investigate the magnetic field decay by means of the fully relativistic Particle-In-Cell simulations. Numerical computations are carried out in 2-dimensions, in which the initial magnetic fields are set to be composed both of the uniform magnetic fields that model the global fields penetrating the NS and of the turbulent magnetic fields that would be originated from the Hall cascade of the large-scale turbulence. Our results show that the whistler cascade of the turbulence transports the magnetic energy preferentially in the direction perpendicular to the uniform magnetic fields. It is also found that the distribution function of electrons becomes anisotropic because electrons with lower energies are predominantly heated in the direction parallel to the uniform magnetic fields due to the Landau resonance, while electrons with higher energies are heated mainly by the cyclotron resonance that makes the distribution function isotro...

Takahashi, Hiroyuki R; Yasutake, Nobutoshi

2010-01-01T23:59:59.000Z

263

Observation of Fowler–Nordheim hole tunneling across an electron tunnel junction due to total symmetry filtering  

Science Journals Connector (OSTI)

Using a SrTiO3(001) barrier and La0.7Sr0.3MnO3(001) electrodes, we study the case of coherent spin-polarized tunneling of electrons that exhibit a symmetry mismatch with respect to the lower electron barrier height. Due to this mismatch, electrons with energy above this barrier height continue to tunnel thanks to total symmetry filtering. This allows us to observe symmetry-matched hole tunneling across this electron tunnel junction, and in particular spin-polarized oscillations in the Fowler-Nordheim hole regime above the hole barrier height, thereby enriching the present theoretical picture of coherent spin-polarized tunneling at finite bias.

M. Bowen, A. Barthélémy, V. Bellini, M. Bibes, P. Seneor, E. Jacquet, J.-P. Contour, and P. H. Dederichs

2006-04-27T23:59:59.000Z

264

Method and apparatus for simulating atomospheric absorption of solar energy due to water vapor and CO.sub.2  

DOE Patents (OSTI)

A method and apparatus for improving the accuracy of the simulation of sunlight reaching the earth's surface includes a relatively small heated chamber having an optical inlet and an optical outlet, the chamber having a cavity that can be filled with a heated stream of CO.sub.2 and water vapor. A simulated beam comprising infrared and near infrared light can be directed through the chamber cavity containing the CO.sub.2 and water vapor, whereby the spectral characteristics of the beam are altered so that the output beam from the chamber contains wavelength bands that accurately replicate atmospheric absorption of solar energy due to atmospheric CO.sub.2 and moisture.

Sopori, Bhushan L. (Denver, CO)

1995-01-01T23:59:59.000Z

265

Method and apparatus for simulating atmospheric absorption of solar energy due to water vapor and CO{sub 2}  

DOE Patents (OSTI)

A method and apparatus for improving the accuracy of the simulation of sunlight reaching the earth`s surface includes a relatively small heated chamber having an optical inlet and an optical outlet, the chamber having a cavity that can be filled with a heated stream of CO{sub 2} and water vapor. A simulated beam comprising infrared and near infrared light can be directed through the chamber cavity containing the CO{sub 2} and water vapor, whereby the spectral characteristics of the beam are altered so that the output beam from the chamber contains wavelength bands that accurately replicate atmospheric absorption of solar energy due to atmospheric CO{sub 2} and moisture. 8 figs.

Sopori, B.L.

1995-06-20T23:59:59.000Z

266

Momentum transport in the vicinity of q{sub min} in reverse shear tokamaks due to ion temperature gradient turbulence  

SciTech Connect

We present an analytic study of momentum transport of tokamak plasmas in the vicinity of minimum safety factor (q) position in reversed magnetic shear configuration. Slab ion temperature gradient modes with an equilibrium flow profile are considered in this study. Quasi-linear calculations of momentum flux clearly show the novel effects of q-curvature on the generation of intrinsic rotation and mean poloidal flow without invoking reflectional symmetry breaking of parallel wavenumber (k{sub ?}). This q-curvature effect originates from the inherent asymmetry in k{sub ?} populations with respect to a rational surface due to the quadratic proportionality of k{sub ?} when q-curvature is taken into account. Discussions are made of possible implications of q-curvature induced plasma flows on internal transport barrier formation in reversed shear tokamaks.

Singh, Rameswar, E-mail: rameswar@ipr.res.in [Institute for Plasma Research, Bhat, Gandhinagar 382 428 (India) [Institute for Plasma Research, Bhat, Gandhinagar 382 428 (India); Laboratoire de Physique des Plasmas, Ecole Polytechnique route de Saclay, 91128 Palaiseau Cedex (France); Singh, R [Institute for Plasma Research, Bhat, Gandhinagar 382 428 (India) [Institute for Plasma Research, Bhat, Gandhinagar 382 428 (India); WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of); Jhang, Hogun [WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of)] [WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of); Diamond, P. H. [WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of) [WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of); Center for Momentum Transport and Flow Organization, University of California, San Diego, California 92093 (United States); Center for Astrophysics and Space Sciences, University of California San Diego, 9500 Gilman Dr., La Jolla, California 92093-0424 (United States)

2014-01-15T23:59:59.000Z

267

Role of plasma response in displacements of the tokamak edge due to applied non-axisymmetric fields  

SciTech Connect

Linear, two-fluid, resistive modelling of the plasma response to applied non-axisymmetric fields shows significant displacement of edge temperature and density profiles. The calculated displacements, often of 2 cm or more in H-mode pedestals with parameters appropriate to DIII-D, are due to the helical distortions resulting from stable edge modes being driven to finite amplitude by the applied fields. In many cases, these displacements are greater in magnitude, and different in phase, than the distortions of the separatrix manifolds predicted from vacuum modelling. Comparison of these results with experimental measurements from Thomson scattering and soft x-ray imaging finds good quantitative agreement. In these experiments, the phase of the applied non-axisymmetric magnetic field was flipped or rotated in order to probe the non-axisymmetric features of the response. The poloidal structures measured by x-ray imaging show clear indications of a helical response, as opposed to simply a change in the axisymmetric transport. Inclusion of two-fluid effects and rotation are found to be important in obtaining quantitative agreement with Thomson scattering data. Modelling shows screening of islands in the H-mode pedestal, but island penetration near the top of the pedestal where the electron rotation vanishes in plasmas with co-current rotation. Enhanced transport due to these islands may provide a mechanism for maintaining the pedestal width below the stability threshold of edge-localized modes. For typical DIII-D parameters, it is shown that the linear approximation is often near or beyond the limit of validity in the H-mode edge; however, the general agreement with experimental measurements indicates that these linear results nevertheless maintain good predictive value for profile displacements.

Evans, T. E. [General Atomics, San Diego; Ferraro, N. M. [General Atomics, San Diego; Orlov, D. M. [University of California, San Diego & La Jolla; Wade, M. [General Atomics, San Diego; Lao, L. L. [General Atomics, San Diego; Moyer, R. A. [University of California, San Diego; Wingen, A. [University of Dusseldorf, Germany; Nazikian, R. [Princeton Plasma Physics Laboratory (PPPL); Unterberg, Ezekial A [ORNL; Shafer, Morgan W [ORNL

2013-01-01T23:59:59.000Z

268

Deviations from the Matthiessen Rule Due to Possible Changes in the Phonon Spectrum of Dilute Magnesium Alloys  

Science Journals Connector (OSTI)

The resistivity of polycrystalline alloys of magnesium with lithium, silver, cadmium or tin, in concentrations up to 1.3 at.% has been measured in the temperature range 1.2 to 300°K. The increase in resistivity at room temperature due to alloying (impurity resistivity) and the decrease in slope of the resistivity-temperature curve of the alloys with increasing alloy concentration, i.e., electron-per-atom ratio, agree with the results reported by Salkovitz, Schindler, and Kammer. An exception is the results for lithium, for which a smaller impurity resistivity has been found. The impurity resistivity may vary by as much as 10% from room temperature to the helium-temperature range. Below 20°K this temperature dependence satisfies the correction introduced by Kohler, which requires an increase in the impurity resistivity with respect to its value at 0°K, proportional to the ideal resistivity of the base metal. Instead of being a constant at higher temperatures, as the Kohler correction would imply, the impurity resistivity decreases for temperatures where the ideal resistivity exceeds the impurity resistivity. As a possible explanation it is suggested that the temperature-dependent part of the alloy resistivity is a corrected ideal resistivity of the pure metal. This leads then to a supposed decrease in the Debye temperature of the magnesium due to the presence of foreign atoms. This explanation and the order of magnitudes involved are in reasonable agreement with published data on the variation of the elastic constants of magnesium upon alloying. The results indicate that besides a change in the phonon spectrum the observed effects depend also on the electron-per-atom ratios for the alloys.

S. B. Das and A. N. Gerritsen

1964-08-17T23:59:59.000Z

269

January 31  

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

1 1 January 31 Attending: Eric Iwona JeffP Keith Alex Hiroshi Larry Jim JeffA Lisa Ernst Security: Jim Mellander discussed how connections to NERSC are managed. This was because now and then legitimate connections get blocked and that can be hard for users to diagnose. Utilization: Cluster has been full with some fluctuations due to ALICE issues with /tmp usage. Outages: There have been slowdowns related to filesystem manager overloads. This will be addressed in the upcoming downtime 2/3. Upcoming Downtimes: On Feb. 3 there will be maintenance in order to add more filesystem managers and address some other issues. This should not affect users but it was announced anyway just in case of problems. Procurements: Iwona meeting w/Lynn next Monday. Interactive node use: There have been a number of users with problematic

270

July 19  

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

19 19 July 19 Attending: Jay and Eric, JeffA and JeffP Utilization: Full again after last week's maintenance and problems, mostly STAR and ALICE jobs. Outages/Incidents: The 7/13 maintenance ended up taking longer than scheduled due to some server issues. The power upgrade took longer than expected so there wasn't time for the /common migration but the power upgrade was successful - we have enough power now for the recently purchased hardware as well as the next procurement. On 7/14 there was a problem with the connection between a 10G switch and the PDSF core router - this caused problems for eliza[16-18] as well as /home. There was more trouble with it 7/15 but it was fixed at the end of the day on 7/15. Upcoming Downtimes: Next month there will be another all day downtime to

271

September 28, 2010  

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

28 28 September 28 PDSF Users Meeting 9/28/10 Attending: Eric and Jay from PDSF and users Ke Han, Joanna, Marjorie, Thomas, Shane. Cluster status: Cluster has been pretty full last few weeks, mostly STAR and ALICE. There are a lot of astrogfs jobs pending but they have no share so they don't run. Outages: NERSC-wide outage recently due to a security problem. PDSF outage this morning - logins were hanging. The memory problem was fixed but another kernel patch is needed. Upcoming downtimes: Nothing scheduled but will do a rolling upgrade of the new patch. /project downtime tomorrow. New hardware: End of fiscal year orders are done. Everything should be online in the next couple weeks. SL302 retirement: Scheduled for the end of October. Other Topics: - Marjorie reports that she is working with the ATLAS grid people.

272

CASE REPORT Laparoscopic Treatment of Bowel Obstruction Due to a Bezoar in a Meckel’s Diverticulum  

E-Print Network (OSTI)

Background and Objectives: Meckel’s diverticulum is a common anomaly of the gastrointestinal tract that may result in gastrointestinal bleeding, diverticulitis, and small bowel obstruction. This report describes the use of laparoscopy to treat a rare complication of Meckel’s diverticulum–small bowel obstruction due to phytobezoar impaction. More generally, it provides an example of the feasibility and utility of a laparoscopic approach to small bowel obstructions of unknown causes. Methods: A 34-year-old male presented to the emergency department complaining of episodic abdominal pain and vomiting. He had no history of abdominal surgery. His vital signs were stable, and his abdomen was distended, but only mildly tender. He had no abdominal wall hernias on examination. Imaging was consistent with small bowel obstruction. He was brought to the operating room where laparoscopy revealed a Meckel’s diverticulum with an impacted phytobezoar as the source of obstruction. The diverticulum was resected and the phytobezoar removed laparoscopically. Results: The patient recovered well and was discharged home on the third postoperative day, tolerating a regular diet. Conclusions: Phytobezoar impaction in a Meckel’s diverticulum causing small bowel obstruction is a rare event. It can be effectively treated laparoscopically. This case provides an example of the potential utility of laparoscopy in treating small bowel obstructions of unclear etiology.

Peter J. Fagenholz; Marc A. De Moya

273

Evolution of pulsar high-energy pulse profiles due to geodetic precession in the striped wind model  

E-Print Network (OSTI)

Geodetic precession has been observed directly in the double pulsar system PSR J0737-3039. Its rate has even been measured and is in agreement with predictions of general relativity. Very recently, the double pulsar has been detected in X-rays and gamma-rays. This opens up the hope to observe geodetic precession in the high-energy pulse profile of this system. Unfortunately the geometric configuration of the binary renders unlikely any detection of such an effect. Nevertheless, this precession should be present in other relativistic binaries or double neutron star systems containing at least one X-ray or gamma-ray pulsar.}{In this paper we compute the variation of the high-energy pulse profile expected from this geodetic motion according to the striped wind model. We compare our results with two-pole caustic and outer gap emission patterns.}{We show that for a sufficient misalignment between the orbital angular momentum and the spin angular momentum, significant change in the pulse profile due to geodetic pre...

Petri, J

2014-01-01T23:59:59.000Z

274

Quantitative microbiological risk assessment of campylobacteriosis cases in the German population due to consumption of chicken prepared in homes  

Science Journals Connector (OSTI)

Infection with Campylobacter spp. is one of the leading causes of food poisoning in Europe. In this work, a retail product to consumer model was developed in order to examine how chicken prepared in German homes exposes the consumer to Campylobacter spp. and the level of resulting illness. The model was designed to include a number of important factors in the exposure assessment and starts with the family unit where one person cooks for the whole household. The behaviour of the cook determines the exposure level of the rest of the family, but the exposure can vary between the family members. Both exposure to the bacteria from undercooking of contaminated chicken meat and from cross-contamination by hands and from the kitchen environment were addressed. The number of illnesses in Germany due to preparation and consumption of fresh and frozen chicken legs and breasts in home was estimated. The model shows that reducing the Campylobacter load on the chicken may result in a greater reduction in the incidence of human illness than reducing prevalence of contaminated products.

Sigrid Brynestad; Leif Braute; Petra Luber; Edda Bartelt

2008-01-01T23:59:59.000Z

275

Radiation and Background Levels in a CLIC Detector due to Beam-Beam Effects Optimisation of Detector Geometries and Technologies  

E-Print Network (OSTI)

The high charge density---due to small beam sizes---and the high energy of the proposed CLIC concept for a linear electron--positron collider with a centre-of-mass energy of up to 3~TeV lead to the production of a large number of particles through beam-beam interactions at the interaction point during every bunch crossing (BX). A large fraction of these particles safely leaves the detector. A still significant amount of energy will be deposited in the forward region nonetheless, which will produce secondary particles able to cause background in the detector. Furthermore, some particles will be created with large polar angles and directly cause background in the tracking detectors and calorimeters. The main sources of background in the detector, either directly or indirectly, are the incoherent $mathrm{e}^{+}mathrm{e}^{-}$ pairs and the particles from $gammagamma ightarrow$ hadron events. The background and radiation levels in the detector have to be estimated, to study if a detector is feasible, that can han...

Sailer, André; Lohse, Thomas

2013-01-10T23:59:59.000Z

276

Evolution of Spacetime arises due to the departure from Holographic Equipartition in all Lanczos-Lovelock Theories of Gravity  

E-Print Network (OSTI)

In the case of general relativity one can interpret the Noether charge in any bulk region as the heat content $TS$ of its boundary surface. Further, the time evolution of spacetime metric in Einstein's theory arises due to the difference $(N_{sur}-N_{bulk})$ of suitably defined surface and bulk degrees of freedom. We show that this thermodynamic interpretation generalizes in a natural fashion to all Lanczos-Lovelock models of gravity. The Noether charge, related to time evolution vector field, in a bulk region of space is equal to the heat content $TS$ of the boundary surface with the temperature $T$ defined using local Rindler observers and $S$ being the Wald entropy. Using the Wald entropy to define the surface degrees of freedom $N_{sur}$ and Komar energy density to define the bulk degrees of freedom $N_{bulk}$, we can also show that the time evolution of the geometry is sourced by $(N_{sur}-N_{bulk})$. When it is possible to choose the foliation of spacetime such that metric is independent of time, the ab...

Chakraborty, Sumanta

2014-01-01T23:59:59.000Z

277

Evolution of Spacetime arises due to the departure from Holographic Equipartition in all Lanczos-Lovelock Theories of Gravity  

E-Print Network (OSTI)

In the case of general relativity one can interpret the Noether charge in any bulk region as the heat content $TS$ of its boundary surface. Further, the time evolution of spacetime metric in Einstein's theory arises due to the difference $(N_{sur}-N_{bulk})$ of suitably defined surface and bulk degrees of freedom. We show that this thermodynamic interpretation generalizes in a natural fashion to all Lanczos-Lovelock models of gravity. The Noether charge, related to time evolution vector field, in a bulk region of space is equal to the heat content $TS$ of the boundary surface with the temperature $T$ defined using local Rindler observers and $S$ being the Wald entropy. Using the Wald entropy to define the surface degrees of freedom $N_{sur}$ and Komar energy density to define the bulk degrees of freedom $N_{bulk}$, we can also show that the time evolution of the geometry is sourced by $(N_{sur}-N_{bulk})$. When it is possible to choose the foliation of spacetime such that metric is independent of time, the above dynamical equation yields the holographic equipartition for Lanczos-Lovelock gravity with $N_{sur}=N_{bulk}$. The implications are discussed.

Sumanta Chakraborty; T. Padmanabhan

2014-08-18T23:59:59.000Z

278

EVALUATION OF TEMPORAL VARIATIONS IN HYDRAULIC CAPTURE DUE TO CHANGING FLOW PATTERNS USING MAPPING AND MODELING TECHNIQUES  

SciTech Connect

Robust performance evaluation represents one of the most challenging aspects of groundwater pump-and-treat (P&T) remedy implementation. In most cases, the primary goal of the P&T system is hydraulic containment, and ultimately recovery, of contaminants to protect downgradient receptors. Estimating the extent of hydraulic containment is particularly challenging under changing flow patterns due to variable pumping, boundaries and/or other conditions. We present a systematic approach to estimate hydraulic containment using multiple lines of evidence based on (a) water-level mapping and (b) groundwater modeling. Capture Frequency Maps (CFMs) are developed by particle tracking on water-level maps developed for each available water level data set using universal kriging. In a similar manner, Capture Efficiency Maps (CEMs) are developed by particle tracking on water-levels calculated using a transient groundwater flow model: tracking is undertaken independently for each stress period using a very low effective porosity, depicting the 'instantaneous' fate of each particle each stress period. Although conceptually similar, the two methods differ in their underlying assumptions and their limitations: their use together identifies areas where containment may be reliable (i.e., where the methods are in agreement) and where containment is uncertain (typically, where the methods disagree). A field-scale example is presented to illustrate these concepts.

SPILIOTOPOULOS AA; SWANSON LC; SHANNON R; TONKIN MJ

2011-04-07T23:59:59.000Z

279

Swellings due to alkali-silica reaction and delayed ettringite formation: Characterisation of expansion isotropy and effect of moisture conditions  

Science Journals Connector (OSTI)

This paper investigates the effect of different conditions on the development of concrete expansions due to alkali-silica reaction (ASR), delayed ettringite formation (DEF) and their combination. The presence of products of the two reactions has been observed during structure diagnosis. The aim of this research is to study the two reactions in concretes with close mix designs but with various types of aggregate and moisture conditions. Measurements performed in the three directions of stress-free specimens showed that DEF expansions could be considered as isotropic for stress-free material. DEF expansions were largely influenced by the storage conditions (immersed in water or in sealed conditions). The volume of storage water modified the kinetics. Under sealed conditions, no expansions were measured for mortar containing non-reactive aggregate, while small positive strains were obtained for mortar containing reactive aggregate. In all cases, new water supply caused fast, large expansions. The different effects of alkali leaching and moisture conditions on DEF and ASR expansions are discussed.

Hassina Bouzabata; Stéphane Multon; Alain Sellier; Hacène Houari

2012-01-01T23:59:59.000Z

280

Significance of changes in residual stresses and mechanical properties due to SMAW repair of girth welds in linepipe  

SciTech Connect

This program assessed the effects of SMAW repair welding on changes in surface residual stress distribution, fracture toughness and hardness around girth weld joints in linepipe. The following types of repair welds were studied: a part wall repair, a multiple part wall repair and full wall repair. The results were compared with a non-repaired weld sample. It was found that for the weld samples studied in this program, the full wall repair produced the most severe residual stress distribution followed by the multiple and single part wall repairs. The single repair only slightly increased the residual stress distribution when compared to the as-welded condition. Dramatic reductions in toughness were found in the multiple and full repairs due to coarse-grained regions produced during the repair operations. The single part wall repair exhibited an increase in toughness as a result of the addition of a cosmetic capping pass which resulted in greater grain refinement. This suggests that repair procedures utilizing a stringer or temper bead technique may reduce the effect of weld repairs on toughness.

McGaughy, T.; Boyles, L.

1990-10-31T23:59:59.000Z

Note: This page contains sample records for the topic "unscheduled downtime due" 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

High Temperature Expansion Due to Compression Test for the Determination of a Cladding Material Failure Criterion under RIA Loading Conditions  

SciTech Connect

This paper is mainly dedicated to the development of an out-of-pile test reproducing the thermo-mechanical loading conditions encountered during the first stage of a Reactivity Initiated Accidents (RIA) transient, dominated by Pellet Clad Mechanical Interaction (PCMI). In particular, the strain-controlled clad loading under high strain rate associated with temperatures up to 600 deg. C expected during the PCMI phase is simulated by an Expansion Due to Compression (EDC) test achievable at high temperature. The use of appropriate materials for the inner pellet made it possible to achieve the tests from 20 deg. C up to 900 deg. C. The interpretation of the test data is supported by Finite Element Analysis (FEA) including parameters tuned using an inverse method coupling FEA and tests results. A deformation model, identified upon the PROMETRA (Transient Mechanical Properties) experimental database and describing the anisotropic viscoplastic behavior of Cold-Worked Stress Relieved Zircaloy-4 cladding alloys under typical RIA loading conditions, is exploited. The combined analysis of experimental results and finite element simulations provides a deeper understanding of the deformation mode (near pure hoop tension) that arises during the tests. The failure mode appears to be representative of that obtained on tubes during the PCMI stage of RIA experiments. An appropriate device is currently developed in order to reach a bi-axiality of the loading path closer to that expected during the PCMI stage (between plane-strain and equal-biaxial tension). (authors)

Le Saux, M.; Poussard, C.; Averty, X.; Sainte Catherine, C.; Carassou, S. [CEA-Saclay, DEN/DMN/SEMI, 91191 Gif-Sur-Yvette (France); Besson, J. [Centre des Materiaux, Mines Paris, CNRS UMR 7633, BP 87, 91003 Evry (France)

2007-07-01T23:59:59.000Z

282

The uncertainties due to quark energy loss on determining nuclear sea quark distribution from nuclear Drell-Yan data  

E-Print Network (OSTI)

By means of two different parametrizations of quark energy loss and the nuclear parton distributions determined only with lepton-nuclear deep inelastic scattering experimental data, a leading order phenomenological analysis is performed on the nuclear Drell-Yan differential cross section ratios as a function of the quark momentum fraction in the beam proton and target nuclei for E772 experimental data. It is shown that there is the quark energy loss effect in nuclear Drell-Yan process apart from the nuclear effects on the parton distribution as in deep inelastic scattering. The uncertainties due to quark energy loss effect is quantified on determining nuclear sea quark distribution by using nuclear Drell-Yan data. It is found that the quark energy loss effect on nuclear Drell-Yan cross section ratios make greater with the increase of quark momentum fraction in the target nuclei. The uncertainties from quark energy loss become bigger as the nucleus A come to be heavier. The Drell-Yan data on proton incident middle and heavy nuclei versus deuterium would result in an overestimate for nuclear modifications on sea quark distribution functions with neglecting the quark energy loss. Our results are hoped to provide good directional information on the magnitude and form of nuclear modifications on sea quark distribution functions by means of the nuclear Drell-Yan experimental data.

C. G. Duan; N. Liu; G. L. Li

2008-11-05T23:59:59.000Z

283

Evolution of Spacetime arises due to the departure from Holographic Equipartition in all Lanczos-Lovelock Theories of Gravity  

E-Print Network (OSTI)

In the case of general relativity one can interpret the Noether charge in any bulk region as the heat content $TS$ of its boundary surface. Further, the time evolution of spacetime metric in Einstein's theory arises due to the difference $(N_{sur}-N_{bulk})$ of suitably defined surface and bulk degrees of freedom. We show that this thermodynamic interpretation generalizes in a natural fashion to all Lanczos-Lovelock models of gravity. The Noether charge, related to time evolution vector field, in a bulk region of space is equal to the heat content $TS$ of the boundary surface with the temperature $T$ defined using local Rindler observers and $S$ being the Wald entropy. Using the Wald entropy to define the surface degrees of freedom $N_{sur}$ and Komar energy density to define the bulk degrees of freedom $N_{bulk}$, we can also show that the time evolution of the geometry is sourced by $(N_{sur}-N_{bulk})$. When it is possible to choose the foliation of spacetime such that metric is independent of time, the above dynamical equation yields the holographic equipartition for Lanczos-Lovelock gravity with $N_{sur}=N_{bulk}$. The implications are discussed.

Sumanta Chakraborty; T. Padmanabhan

2014-12-04T23:59:59.000Z

284

Relationship between the gamma-ray burst pulse width and energy due to the Doppler effect of fireballs  

E-Print Network (OSTI)

We study in details how the pulse width of gamma-ray bursts is related with energy under the assumption that the sources concerned are in the stage of fireballs. Due to the Doppler effect of fireballs, there exists a power law relationship between the two quantities within a limited range of frequency. The power law range and the power law index depend strongly on the observed peak energy $E_p$ as well as the rest frame radiation form, and the upper and lower limits of the power law range can be determined by $E_p$. It is found that, within the same power law range, the ratio of the $FWHM$ of the rising portion to that of the decaying phase of the pulses is also related with energy in the form of power laws. A platform-power-law-platform feature could be observed in the two relationships. In the case of an obvious softening of the rest frame spectrum, the two power law relationships also exist, but the feature would evolve to a peaked one. Predictions on the relationships in the energy range covering both the BATSE and Swift bands for a typical hard burst and a typical soft one are made. A sample of FRED (fast rise and exponential decay) pulse bursts shows that 27 out of the 28 sources belong to either the platform-power-law-platform feature class or the peaked feature group, suggesting that the effect concerned is indeed important for most of the sources of the sample. Among these bursts, many might undergo an obvious softening evolution of the rest frame spectrum.

Y. -P. Qin; Y. -M. Dong; R. -J. Lu; B. -B. Zhang; L. -W. Jia

2005-07-01T23:59:59.000Z

285

An experimental measurement of metal multilayer x-ray reflectivity degradation due to intense x-ray flux  

SciTech Connect

The degradation of the x-ray reflection characteristics of metal multilayer Bragg diffractors due to intense x-ray flux was investigated. The Z-pinch plasma produced by PROTO II of Sandia National Laboratories, Albuquerque, New Mexico, was used as the source. The plasma generated total x-ray yields of as much as 40 kJ with up to 15 kJ in the neon hydrogen- and helium-like resonance lines in nominal 20-ns pulses. Molybdenum-carbon, palladium-carbon, and tungsten-carbon metal multilayers were placed at 15 and 150 cm from the plasma center. The multilayers were at nominal angles of 5/sup 0/ and 10/sup 0/ to diffract the neon resonance lines. The time-integrated x-ray reflection of the metal multilayers was monitored by x-ray film. A fluorescer-fiber optic-visible streak camera detector system was then used to monitor the time-resolved x-ray reflection characteristics of 135 A- 2d tungsten-carbon multilayers. A large specular component in the reflectivity prevented determination of the rocking curve of the multilayer. For a neon implosion onto a vanadium-doped polyacrylic acid foam target shot, detailed modeling was attempted. The spectral flux was determined with data from 5 XRD channels and deconvolved using the code SHAZAM. The observed decay in reflectivity was assumed to correspond to the melting of the first tungsten layer. A ''conduction factor'' of 82 was required to manipulate the heat loading of the first tungsten layer such that the time of melting corresponded to the observed decay. The power at destruction was 141 MW/cm/sup 2/ and the integrated energy at destruction was 2.0 J/cm/sup 2/. 82 refs., 66 figs., 10 tabs.

Hockaday, M.Y.P.

1987-06-01T23:59:59.000Z

286

An estimate by two methods of thyroid absorbed doses due to BRAVO fallout in several northern Marshall Islands  

SciTech Connect

Estimates of the thyroid absorbed doses due to fallout originating from the 1 March 1954 BRAVO thermonuclear test on Bikini Atoll have been made for several inhabited locations in the Northern Marshall Islands. Rongelap, Utirik, Rongerik and Ailinginae Atolls were also inhabited on 1 March 1954, where retrospective thyroid absorbed doses have previously been reconstructed. Current estimates are based primarily on external exposure data, which were recorded shortly after each nuclear test in the Castle Series, and secondarily on soil concentrations of {sup 137}Cs in samples collected in 1978 and 1988, along with aerial monitoring done in 1978. External exposures and {sup 137}Cs Soil concentrations were representative of the atmospheric transport and deposition patterns of the entire Castle Series tests and show that the BRAVO test was the major contributor to fallout exposure during the Castle series and other test series which were carried out in the Marshall Islands. These data have been used as surrogates for fission product radioiodines and telluriums in order to estimate the range of thyroid absorbed doses that may have occurred throughout the Marshall Islands. Dosimetry based on these two sets of estimates agreed within a factor of 4 at the locations where BRAVO was the dominant contributor to the total exposure and deposition. Both methods indicate that thyroid absorbed doses in the range of 1 Gy (100 rad) may have been incurred in some of the northern locations, whereas the doses at southern locations did not significantly exceed levels comparable to those from worldwide fallout. The results of these estimates indicate that a systematic medical survey for thyroid disease should be conducted, and that a more definitive dose reconstruction should be made for all the populated atolls and islands in the Northern Marshall Islands beyond Rongelap, Utirik, Rongerik and Ailinginae, which were significantly contaminated by BRAVO fallout. 30 refs., 2 figs., 10 tabs.

Musolino, S.V.; Hull, A.P. [Brookhaven National Lab., Upton, NY (United States); Greenhouse, N.A.

1997-10-01T23:59:59.000Z

287

Triclosan Resistance of Pseudomonas aeruginosa PAO1 Is Due to FabV, a Triclosan-Resistant Enoyl-Acyl Carrier Protein Reductase  

Science Journals Connector (OSTI)

...2010 ARTICLE MECHANISMS OF RESISTANCE Triclosan Resistance of Pseudomonas aeruginosa PAO1 Is Due to FabV, a Triclosan-Resistant Enoyl-Acyl Carrier Protein...Urbana-Champaign, Urbana, Illinois 61801 Triclosan, a very widely used biocide, specifically...

Lei Zhu; Jinshui Lin; Jincheng Ma; John E. Cronan; Haihong Wang

2009-11-23T23:59:59.000Z

288

Early Trends in Landcover Change and Forest Fragmentation Due to Shale-Gas Development in Pennsylvania: A Potential Outcome for the Northcentral Appalachians  

Science Journals Connector (OSTI)

Worldwide shale-gas development has the potential to cause substantial ... , we examine land cover change due to shale-gas exploration, with emphasis on forest fragmentation. Pennsylvania’s shale-gas development ...

P. J. Drohan; M. Brittingham; J. Bishop; K. Yoder

2012-05-01T23:59:59.000Z

289

arXiv:1311.0292v1[astro-ph.EP]1Nov2013 Runaway greenhouse effect on exomoons due to  

E-Print Network (OSTI)

arXiv:1311.0292v1[astro-ph.EP]1Nov2013 Runaway greenhouse effect on exomoons due to irradiation to experience a runaway greenhouse effect. Results. Planetary illumination from a 13-Jupiter-mass planet onto

Barnes, Rory

290

Thermal Stratification Effects on Hiemenz Flow of Nanofluid Over a Porous Wedge Sheet in the Presence of Suction/Injection Due to Solar Energy: Lie Group Transformation  

Science Journals Connector (OSTI)

The objective of the present work is to investigate theoretically the Hiemenz flow and heat transfer of an incompressible viscous nanofluid past a porous wedge sheet in the presence of thermal stratification due ...

R. Kandasamy; I. Muhaimin; N. Siva Ram; K. K. Sivagnana Prabhu

2012-08-01T23:59:59.000Z

291

EPR Line Shifts and Line Shape Changes Due to Spin Exchange of Nitroxide Free Radicals in Liquids 2. Extension to High Spin Exchange Frequencies and Inhomogeneously  

E-Print Network (OSTI)

EPR Line Shifts and Line Shape Changes Due to Spin Exchange of Nitroxide Free Radicals in Liquids 2 for the EPR spectrum of a nitroxide free radical undergoing spin exchange in the slow exchange limit following

Bales, Barney

292

Comparison of PMP-Driven Probable Maximum Floods with Flood Magnitudes due to Increasingly Urbanized Catchment: The Case of American River Watershed  

Science Journals Connector (OSTI)

Since historical (predam) data are traditionally the sole criterion for dam design, future (postdam) meteorological and hydrological variability due to land-use and land-cover change cannot be considered for assessing design robustness. For ...

Wondmagegn Yigzaw; Faisal Hossain; Alfred Kalyanapu

2013-08-01T23:59:59.000Z

293

TESTING AND ANALYSIS OF CAP CONCRETE STRESS AND STRAIN DUE TO SHRINKAGE, CREEP, AND EXPANSION FINAL REPORT  

SciTech Connect

In-situ decommissioning of Reactors P- and R- at the Savannah River Site will require filling the reactor vessels with a special concrete based on materials such as magnesium phosphate, calcium aluminate or silica fume. Then the reactor vessels will be overlain with an 8 ft. thick layer of Ordinary Portland Cement (OPC) steel reinforced concrete, called the 'Cap Concrete'. The integrity of this protective layer must be assured to last for a sufficiently long period of time to avoid ingress of water into the reactor vessel and possible movement of radioactive contamination into the environment. During drying of this Cap Concrete however, shrinkage strains are set up in the concrete as a result of diffusion and evaporation of water from the top surface. This shrinkage varies with depth in the poured slab due to a non-uniform moisture distribution. This differential shrinkage results in restraint of the upper layers with larger shrinkage by lower layers with lesser displacements. Tensile stresses can develop at the surface from the strain gradients in the bulk slab, which can lead to surface cracking. Further, a mechanism called creep occurs during the curing period or early age produces strains under the action of restraining forces. To investigate the potential for surface cracking, an experimental and analytical program was started under TTQAP SRNL-RP-2009-01184. Slab sections made of Cap Concrete mixture were instrumented with embedded strain gages and relative humidity sensors and tested under controlled environmental conditions of 23 C and relative humidities (RH) of 40% and 80% over a period of 50 days. Calculation methods were also developed for predictions of stress development in the full-scale concrete placement over the reactor vessels. These methods were evaluated by simulating conditions for the test specimens and the calculation results compared to the experimental data. A closely similar test with strain gages was performed by Kim and Lee for a concrete mixture that did not employ humidity sensors and the admixtures used in this program. Yuan and Wan tried to predict the shrinkage strains and stresses in the Kim and Lee experiment, but did not include a creep analysis. Grasley and Lange conducted full restraint load tests on a concrete prism instrumented with humidity sensors over a 7 day curing period. The hypothetical case of full-scale placement of the Cap Concrete was also analyzed using the developed analytical methods. The calculation performed in this report is for scoping purposes only.

Guerrero, H.; Restivo, M.

2011-08-01T23:59:59.000Z

294

Estimation of tumour dose enhancement due to gold nanoparticles during typical radiation treatments: a preliminary Monte Carlo study  

Science Journals Connector (OSTI)

A recent mice study demonstrated that gold nanoparticles could be safely administered and used to enhance the tumour dose during radiation therapy. The use of gold nanoparticles seems more promising than earlier methods because of the high atomic number of gold and because nanoparticles can more easily penetrate the tumour vasculature. However, to date, possible dose enhancement due to the use of gold nanoparticles has not been well quantified, especially for common radiation treatment situations. Therefore, the current preliminary study estimated this dose enhancement by Monte Carlo calculations for several phantom test cases representing radiation treatments with the following modalities: 140 kVp x-rays, 4 and 6 MV photon beams, and 192Ir gamma rays. The current study considered three levels of gold concentration within the tumour, two of which are based on the aforementioned mice study, and assumed either no gold or a single gold concentration level outside the tumour. The dose enhancement over the tumour volume considered for the 140 kVp x-ray case can be at least a factor of 2 at an achievable gold concentration of 7 mg Au/g tumour assuming no gold outside the tumour. The tumour dose enhancement for the cases involving the 4 and 6 MV photon beams based on the same assumption ranged from about 1% to 7%, depending on the amount of gold within the tumour and photon beam qualities. For the 192Ir cases, the dose enhancement within the tumour region ranged from 5% to 31%, depending on radial distance and gold concentration level within the tumour. For the 7 mg Au/g tumour cases, the loading of gold into surrounding normal tissue at 2 mg Au/g resulted in an increase in the normal tissue dose, up to 30%, negligible, and about 2% for the 140 kVp x-rays, 6 MV photon beam, and 192Ir gamma rays, respectively, while the magnitude of dose enhancement within the tumour was essentially unchanged.

Sang Hyun Cho

2005-01-01T23:59:59.000Z

295

Development and assessment of electronic manual for well control and blowout containment  

E-Print Network (OSTI)

Fig. 1.4 ? Spindletop Lucas well blowout (1901) 17 As the rotary rig took over for the cable tool rig, and the depth of the wells kept getting deeper, there was a need to control the higher pressures encountered. The developments... this is not achieved, there might be an unscheduled inflow of fluids into the well. Most commonly, the occurrence of a kick is due to the rig crew not doing their job of managing the well pressures adequately. With the event of a kick follows the need...

Grottheim, Odd Eirik

2005-11-01T23:59:59.000Z

296

Co-current rotation of the bulk ions due to the ion orbit loss at the edge of a tokamak plasma  

E-Print Network (OSTI)

Flux-surface-averaged momentum loss and parallel rotation of the bulk ions at the edge of a tokamak plasma due to the ion orbit loss are calculated by computing the minimum loss energy of both the trapped and the passing thermal ions. The flux-surface-averaged parallel rotation of the bulk ions is in the co-current direction. The peak of the co-current rotation speed locates inside the last closed flux surface due to the orbit loss of the co-current thermal ions at the very edge of a tokamak plasma. The peaking position moves inward when the ion temperature increases.

Pan, Chengkang; Ou, Jing

2014-01-01T23:59:59.000Z

297

Effect of vitamin A and fish meal on stress resistance due to changes in environment, vitamin A storage, and reproductive performance of turkeys  

E-Print Network (OSTI)

PROCEDURE 3 Experiment 1--The effect of vitamin A and fish meal on stress resistance due to changes in enviroment and vitamin A storage of Broad Breasted Bronze turkeys IV EXPERIMENTAL PROCEDURE 19 Experiment 2--The effect of Vitamin A and fish meal... on stress resistance due to changes in enviroment and vitamin A storage of Broad Breasted White turkeys V EXPERIMENTAL PROCEDURE 19 30 Experiment. 3--The effect of vitamin A and fish meal on the reproductive perform"nce of Broad Breasted Bronze...

Lozano, Jose Arnoldo

2012-06-07T23:59:59.000Z

298

STAT 3540: Assignment 2 -Due Friday February 24 1. The data file retail lists total U.K. (United Kingdom) retail sales (in billions of pounds)  

E-Print Network (OSTI)

STAT 3540: Assignment 2 - Due Friday February 24 1. The data file retail lists total U.K. (United Kingdom) retail sales (in billions of pounds) from January 1986 through March 2007. a) Display to determine the month with highest and lowest retail sales. iii. Construct a graph of the seasonally adjusted

Oyet, Alwell

299

Physics 305 Problem set 1 Due: Fri, Jan. 27, 2012 1) (a) Consider a thin slab of resistive material, as in the first figure, with resistivity and  

E-Print Network (OSTI)

Physics 305 Problem set 1 Due: Fri, Jan. 27, 2012 1) (a) Consider a thin slab of resistive material, as in the first figure, with resistivity and thickness d. Find the resistance of a square piece, with edge length covers each of the two faces. Show that it is independent of L. (This is the two-dimensional "resistivity

Ross, Joseph

300

Bandgap Engineering in Disordered Graphene Two-dimensional atomic crystals attract attention due to their unique low-dimensional electron transport  

E-Print Network (OSTI)

Bandgap Engineering in Disordered Graphene ­Two-dimensional atomic crystals attract attention due-gap semiconductor graphene. The relativistic Dirac dispersion of electrons in graphene leads to an anomalous four large compared to electron Fermi wavelength. In high magnetic fields, the cleanest graphene samples

Weston, Ken

Note: This page contains sample records for the topic "unscheduled downtime due" 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

Vibrational Coherence Due to Promoting Mode Activity in the Relaxation Dynamics of the Class III Mixed-Valence Molecule [Ru2TIEDCl4]+  

E-Print Network (OSTI)

Vibrational Coherence Due to Promoting Mode Activity in the Relaxation Dynamics of the Class III intermediate displays a large amplitude, very low frequency, highly damped vibrational coherence that completely modulates the absorption. The coherence frequency is 20 ( 5 cm-1, and the dephasing times range

302

3D Equilibrium Effects due to RMP application on DIII-D* S. Lazerson1, E. Lazarus2, S. Hudson1, N. Pablant1, D. Gates1  

E-Print Network (OSTI)

3D Equilibrium Effects due to RMP application on DIII-D* S. Lazerson1, E. Lazarus2, S. Hudson1, N that are consistent with the experimental pres- sure and current profiles. A 3D reconstruction using the STELLOPT code the equilibria generated by the 3D codes and between STELLOPT and EFIT are presented. Introduction Interpretation

Hudson, Stuart

303

Publication List for Robert L. Lysak Hudson, M. K., F. S. Mozer, and R. L. Lysak, Magnetic field-aligned potential drops due to  

E-Print Network (OSTI)

, 1979. Lysak, R. L., M. K. Hudson, and M. Temerin, Ion heating by strong electrostatic ion cyclotron-aligned potential drops due to electrostatic ion cyclotron turbulence, Geophys. Res. Lett., 5, 143, 1978. Cattell, C turbulence, J. Geophys. Res., 85, 678, 1980. Lysak, R. L., Electrostatic ion cyclotron turbulence and auroral

Lysak, Bob

304

EPR Line Shifts and Line Shape Changes Due to Spin Exchange of Nitroxide Free Radicals Barney L. Bales* and Miroslav Peric  

E-Print Network (OSTI)

EPR Line Shifts and Line Shape Changes Due to Spin Exchange of Nitroxide Free Radicals in Liquids; In Final Form: July 22, 1997X An expression for the EPR line shape of a nitroxide free radical undergoing,7,10-19 work has been devoted to the EPR spectral changes induced by spin exchange between radicals in liquids

Bales, Barney

305

Local approach to fracture based prediction of the T56J and 100 shifts due to irradiation for an A508 pressure vessel steel.  

E-Print Network (OSTI)

Local approach to fracture based prediction of the T56J and TKIc 100 shifts due to irradiation model integrating a description of viscoplasticity, ductile damage and brittle fracture is used to simulate both the impact (Charpy) test and the toughness (CT) fracture test. The model is calibrated

Boyer, Edmond

306

Abstract--Current building designs are not energy-efficient enough due to many reasons. One of them is the centralized  

E-Print Network (OSTI)

to not only green buildings but also vast number of the conventional buildings to reduce the energy1 Abstract--Current building designs are not energy-efficient enough due to many reasons. One the occupants' actual usage and adjusting the energy consumption accordingly. In this paper, we discuss our

Jain, Raj

307

Heat Capacity and Latent Heat The objective of this laboratory is for you to explore the heat capacity of materials due to atomic  

E-Print Network (OSTI)

Heat Capacity and Latent Heat Objective The objective of this laboratory is for you to explore the heat capacity of materials due to atomic vibrations and the latent heat of phase, dataacquisition software, plotting and analysis software Introduction Knowledge of the heat capacity

Braun, Paul

308

Extending the Domain of Comparative Genomics The comparative approach to Genomics is a major success at present and due to the continued  

E-Print Network (OSTI)

Extending the Domain of Comparative Genomics The comparative approach to Genomics is a major success at present and due to the continued accumulation of genomes, the demand for such methods will only from non-genes. But the comparative approach will eventually dominate as the number fo genomes become

Goldschmidt, Christina

309

SSRL BEAM PORT SCHEDULE  

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

1, 2002 Nov. 18, 2002 Nov. 25, 2002 Dec. 02, 2002 1, 2002 Nov. 18, 2002 Nov. 25, 2002 Dec. 02, 2002 Dec. 09, 2002 Dec. 16, 2002 Dec. 23, 2002 Dec. 30, 2002 Jan. 06, 2003 Jan. 13, 2003 Jan. 20, 2003 Jan. 27, 2003 Feb. 03, 2003 Feb. 10, 2003 Feb. 17, 2003 Feb. 24, 2003 Mar. 03, 2003 Mar. 10, 2003 Mar. 17, 2003 Mar. 24, 2003 Mar. 31, 2003 Back to Table of Contents WEEK OF Nov. 11, 2002 Nov. 11, 2002 Nov. 12, 2002 Nov. 13, 2002 Nov. 14, 2002 Nov. 15, 2002 Nov. 16, 2002 Nov. 17, 2002 BEAM LINE 1-4 Nov. 11, 2002 Nov. 12, 2002 Nov. 13, 2002 Nov. 14, 2002 Nov. 15, 2002 Nov. 16, 2002 Nov. 17, 2002 Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled Unscheduled

310

Stabilization of the Shear Instability in a Dust Layer of a Protoplanetary Disk and Possible Formation of Planetesimals due to Gravitational Fragmentation of the Dust Layer  

E-Print Network (OSTI)

We show that the planetesimal formation due to the gravitational fragmentation of a dust layer in a protoplanetary disk is possible. The dust density distribution in the dust layer would approach the constant Richardson number distribution due to the dust stirring by the shear instability and dust settling. We perform the analysis of the shear instability of dust layer in a protoplanetary disk with the constant Richardson number density distribution. Our study revealed that this distribution is stable against the shear instability even if the dust density at the midplane reaches the critical density of the gravitational instability, and the planetesimal formation through the gravitational fragmentation of the dust layer can occur even for the dust to gas surface density ratio with the solar composition.

Naoki Ishitsu; Minoru Sekiya

2004-06-02T23:59:59.000Z

311

A New Approach for Sustainable Energy Systems due to the Excitation of Inner?core Electrons on Zinc Atoms Induced by Surface?ion?recombination  

Science Journals Connector (OSTI)

The crisis of Nuclear power plants due to the March 11 2011 Tsunami in Japan suggests an increased need for sustainable science and technology in our society. The authors propose a new physical approach with surface?ion?recombination (SIR) due to the inner?core excitation of zinc atom [ Ne ]3s 2 3p 6 3d 10 4s 2 that brings no magnetic moment. Condensed material indicated the energy dependence of X?ray diffraction intensity in which exists strong diffuse scattering intensities at 10 eV 90 eV 100 eV and 230 eV. These energies are strictly corresponding to zinc of electron systems (3s 3p 3d and these combination). Our approach may have the potential of techniques for future nanotechnology especially for hydrogen storage systems.

Mitsugi Hamasaki; Masumi Obara; Mitsuomi Yamaguchi; Masahiro Kuwayama; Kozo Obara

2011-01-01T23:59:59.000Z

312

Beamlet deflection due to beamlet-beamlet interaction in a large-area multiaperture negative ion source for JT-60U  

SciTech Connect

The JT-60U negative ion source has been designed to produce high current beams of 22 A through grids of 1080 apertures (five segments with nine rows of 24 apertures). One of the key issues is to steer such a high current beam through the multiaperture grids in order to focus the overall beam envelope because the beamlet-beamlet interaction may deflect the outer beamlets outward due to unbalanced space charge repulsion. To clarify the beam deflection in the JT-60U negative ion source, the beamlet trajectory in a multiaperture ion source was calculated by a three-dimensional simulation code. The measured angles of the outmost beamlets were in agreement with the calculated results where space charge of the beamlets was taken into account. It is noticed that the deflection of the outermost beamlet due to the beamlet-beamlet interaction is saturated at 5.2 mrad outward for beamlets more than ten.

Kamada, M.; Hanada, M.; Ikeda, Y.; Grisham, L. R.; Jiang, W. [Japan Atomic Energy Agency, 801-1 Mukoyama, Naka, Ibaraki 311-0193 (Japan); Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543 (United States); Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188 (Japan)

2008-02-15T23:59:59.000Z

313

Minimum entropy generation due to heat transfer and fluid friction in a parabolic trough receiver with non-uniform heat flux at different rim angles and concentration ratios  

Science Journals Connector (OSTI)

Abstract In this paper, Monte Carlo ray-tracing and computational fluid dynamics are used to numerically investigate the minimum entropy generation due to heat transfer and fluid friction in a parabolic trough receiver. The analysis was carried out for rim angles in the range 40°–120°, concentration ratios in the range 57–143, Reynolds numbers in the range 1.02 × 104–1.36 × 106 and fluid temperatures in the range 350–650 K. Results show existence of an optimal Reynolds number at any given combination of fluid temperature, concentration ratio and rim angle for which the total entropy generation is a minimum. The total entropy generation was found to increase as the rim angle reduced, concentration ratio increased and fluid temperature reduced. The high entropy generation rates at low rim angles are mainly due to high peak temperatures in the absorber tube at these low rim angles.

Aggrey Mwesigye; Tunde Bello-Ochende; Josua P. Meyer

2014-01-01T23:59:59.000Z

315

1 Math 405/607 E: Ass. 0: Due 23 Sept 2009 1. toeplitz: Use the MATLAB function toeplitz to build the matrix A in  

E-Print Network (OSTI)

1 Math 405/607 E: Ass. 0: Due 23 Sept 2009 1. toeplitz: Use the MATLAB function toeplitz to build the matrix A in the demo programs we constructed in class, i.e., which is equivalent to: A=diag(-2*ones(N-2 result to the exact solution by plotting u(xk) and uexact(xk) vs x on one graph and plot the error |u

Peirce, Anthony

316

1 Math 405/607 E: Ass. 0: Due 21 Sept 2012 1. toeplitz: Use the MATLAB function toeplitz to build the matrix A in  

E-Print Network (OSTI)

1 Math 405/607 E: Ass. 0: Due 21 Sept 2012 1. toeplitz: Use the MATLAB function toeplitz to build the matrix A in the demo programs we constructed in class, i.e., which is equivalent to: A=diag(ones(n-2(x) and N = 8. Compare your result to the exact solution by plotting u(xk) and uexact(xk) vs x on one graph

Peirce, Anthony

317

Analysis of Tube Failure Propagation due to Overheating in a Prototype LMFBR Steam-Generator Geometry by Using QUARK-LP Ver.4  

SciTech Connect

A computer code QUARK-LP had been developed to analyze a leak propagation due to overheating in steam generator (SG) heat-transfer tubes of a liquid-metal cooled fast breeder reactor (LMFBR). In Version 4, the reaction zone was divided into three parts; (1) the steam rich zone, (2) the mixing zone and (3) the sodium rich zone, depending on the location from the failed tub. This version includes RELAP5/MOD3 to analyze thermal hydraulics of water/steam in detail. In the analysis using this computer code it was confirmed that leak propagation due to overheating does not happen in the Japanese prototype LMFBRs' SG as was revealed in the analysis of another organization. From the viewpoint of probabilistic safety assessment (PSA) for RIR (risk informed regulation), the applicability of QUARK-LP Version 4 to the analysis of leak propagation due to overheating was examined on a hypothetically severe situation. In order to simulate hypothetical leak propagation due to overheating under the rated power operation, the cover gas pressure detectors were assumed to lose their function in the analysis thereby causing a secondary tube failure intentionally. A series of leak propagation from the initial leak to the secondary leak were simulated, and the possibility of a new tube failure was examined. Based on the analyses, it has been confirmed that this code is able to be applied to the analysis of the tube failure propagation phenomena in a real plant system, and a tertiary leak does not happen even when a secondary leak was introduced intentionally as an application example. (authors)

Yoshihisa, Shindo; Kazuo, Haga [Incorporated Administrative Agency Japan Nuclear Energy Safety Organization (JNES), 4-3-20 Toranomon, Minato-ku, Tokyo 105-0001 (Japan)

2004-07-01T23:59:59.000Z

318

Analysis of energies of stationary bubbles at liquid pool surfaces and the subsequent droplet release due to bubble burst based on RESUS code calculations  

SciTech Connect

In case of a hypothetical nuclear reactor accident involving a failure of the primary system, a liquid coolant pool may frequently be formed, which may be contaminated by suspended or solved fuel particles and fission products. For many accident sequences, in which gas is injected into the liquid domain or bubbles are generated by means of heating, pressure transients or chemical reactions, the release of low volatile species from liquid surfaces into a gas atmosphere due to bubble burst is identified as a decisive release mechanism. Generally, resuspension of radioactive species is caused by droplets ejected from the pool surface into the atmosphere, either dominated by direct momentum exchange mechanisms between gas flow and liquid for high gas fluxes or by bursting of single bubbles in case of low gas fluxes. In the latter case, the release of droplets containing radionuclides is governed by two mechanisms, namely micro-droplet generation due to bubble film cap collapse and formation and subsequent disintegration of liquid jets producing so-called jet droplets. Jet and jet droplet formation is modeled in the code system RESUS.MOD2 which contains models for the growth of the bubble in the pool, its shape while resting at the liquid surface, and jet and jet-droplet generation after bubble cap rupture. Using the module BUBSHAPE (BUBbleSHAPE) of the RESUS code, the characteristic profile of a bubble resting at the liquid surface as well as the mechanical energies available for droplet formation and consequently droplet- and particle release can be determined. The governing resuspension energies are identified to be the surface energy, the energy stored in the gas within the bubble due to its excess pressure, and the potential energy due to the displacement of liquid.

Starflinger, J.; Koch, M.K.; Brockmeier, U.; Unger, H. [Ruhr Univ., Bochum (Germany). Dept. for Nuclear and New Energy Systems; Schuetz, W. [Inst. for Reactor Safety, Karlsruhe (Germany)

1996-08-01T23:59:59.000Z

319

Development of equations to determine the increase in pavement condition due to treatment and the rate of decrease in condition after treatment for a local agency pavement network.  

E-Print Network (OSTI)

DEVELOPMENT OF EQUATIONS TO DETERMINE THE INCREASE IN PAVEMENT CONDITION DUE TO TREATMENT AND THE RATE OF DECREASE IN CONDITION AFTER TREATMENT FOR A LOCAL AGENCY PAVEMENT NETWORK A Thesis by MAITHILEE MUKUND DESHMUKH 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 2009 Major Subject: Civil Engineering DEVELOPMENT OF EQUATIONS TO DETERMINE THE INCREASE IN PAVEMENT...

Deshmukh, Maithilee Mukund.

2010-07-14T23:59:59.000Z

320

Cancer Due to Prolonged Inflammation  

E-Print Network (OSTI)

Werb J. Inflammation and cancer. Nature. 2002 December 19;J.T. , Szabo E. , et al. Cancer and inflammation: PromiseInflammation, a Key Event in Cancer Development. Molecular

Lingampalli, Nithya

2013-01-01T23:59:59.000Z

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321

CP violation due to compactification  

SciTech Connect

We address the challenging issue of how CP violation is realized in higher dimensional gauge theories without higher dimensional elementary scalar fields. In such theories interactions are basically governed by a gauge principle and therefore to get CP violating phases is a nontrivial task. It is demonstrated that CP violation is achieved as the result of compactification of extra dimensions, which is incompatible with the 4-dimensional CP transformation. As a simple example we adopt a 6-dimensional U(1) model compactified on a 2-dimensional orbifold T{sup 2}/Z{sub 4}. We argue that the 4-dimensional CP transformation is related to the complex structure of the extra space and show how the Z{sub 4} orbifolding leads to CP violation. We confirm by explicit calculation of the interaction vertices that CP violating phases remain even after the rephasing of relevant fields. For completeness, we derive a rephasing invariant CP violating quantity, following a similar argument in the Kobayashi-Maskawa model which led to the Jarlskog parameter. As an example of a CP violating observable we briefly comment on the electric dipole moment of the electron.

Lim, C. S.; Nishiwaki, Kenji [Department of Physics, KobeUniversity, Kobe 657-8501 (Japan); Maru, Nobuhito [Department of Physics, Chuo University, Tokyo 112-8551 (Japan)

2010-04-01T23:59:59.000Z

322

CP Violation due to Compactification  

E-Print Network (OSTI)

We address the challenging issue of how CP violation is realized in higher dimensional gauge theories without higher dimensional elementary scalar fields. In such theories interactions are basically governed by a gauge principle and therefore to get CP violating phases is a non-trivial task. It is demonstrated that CP violation is achieved as the result of compactification of extra dimensions, which is incompatible with the 4-dimensional CP transformation. As a simple example we adopt a 6-dimensional U(1) model compactified on a 2-dimensional orbifold $T^{2}/Z_{4}$. We argue that the 4-dimensional CP transformation is related to the complex structure of the extra space and show how the $Z_{4}$ orbifolding leads to CP violation. We confirm by explicit calculation of the interaction vertices that CP violating phases remain even after the re-phasing of relevant fields. For completeness, we derive a re-phasing invariant CP violating quantity, following a similar argument in the Kobayashi-Maskawa model which led to the Jarlskog parameter. As an example of a CP violating observable we briefly comment on the electric dipole moment of the electron.

C. S. Lim; Nobuhito Maru; Kenji Nishiwaki

2009-10-13T23:59:59.000Z

323

Shorts due to diagnostic leads  

SciTech Connect

The superconducting toroidal field coils that are being tested in the Large Coil Test Facility (LCTF) are heavily instrumented. General Electric coil, a lead wire of an internal sensor became shorted across an estimated three or four turns of the pancake winding. This short occurred during the final stages of the winding fabrication and was not accessible for repair. Resistance, voltage gradient, and transient voltage decay measurements were performed to characterize the short and the magnetic damping of the large steel bobbin and outer structural ring. The 32-gage wire causing the short was estimated to be about 10 cm long, with a resistance of 55 m..cap omega... As a safety measure, we decided to burn out the shorted wire at room temperature before installing the coil in LCTF. Tests were made to determine the energy needed to vaporize a small wire. Computer calculations indicated that within the voltage limits set for the coil, it was not feasible to burn out the wire by rapidly dumping the coil from a low-current dc charge-up. We accomplished the burnout by applying 800 V at 3.25 A, and 60 Hz for about 1 s. Transient voltage decay measurements made after the burnout and compared with those made before the attempt confirmed that the short had indeed been opened.

Ellis, J.F.; Lubell, M.S.; Pillsbury, R.D.; Shen, S.S.; Thome, R.J.; Walstrom, P.L.

1985-03-01T23:59:59.000Z

324

More Aluminum due by 1968  

Science Journals Connector (OSTI)

Two more primary aluminum producers are promising more capacity to a hungry aluminum market. Anaconda will build a new potline at its reduction plant at Columbia Falls, Mont., and Reynolds Metals is planning four new ones in the Northwest.These ...

1966-08-22T23:59:59.000Z

325

Noise Levels due to Trains  

Science Journals Connector (OSTI)

Some fifty freight and passenger trains were investigated at distances between 25 and 1000 ft. The decrease of sound?pressure levels with increasing distance indicates that whistles are to be considered as point sources but engines and track noise are line sources out to distances comparable with the lengths of the source. All engines showed a pure tone in the region of 100 cps and freight engines a second tone at about 300 cps when pulling hard. Otherwise freight engines showed little change in level whatever the operating conditions. Noise from passenger engines showed marked changes in level since they operate with much more exaggerated changes in power than freight engines. Track noise depends on the rolling stock—freight cars and run?of?the?mill passenger cars have very similar noise spectra whereas the deluxe cars used on “prestige trains” have spectra lying 10 to 20 db lower in all frequency bands. All the cars have coil springs but the latter alone have hydraulic shock absorbers.

T. F. W. Embleton; G. J. Thiessen

1961-01-01T23:59:59.000Z

326

Case report of a near medical event in stereotactic radiotherapy due to improper units of measure from a treatment planning system  

SciTech Connect

Purpose: The authors hereby notify the Radiation Oncology community of a potentially lethal error due to improper implementation of linear units of measure in a treatment planning system. The authors report an incident in which a patient was nearly mistreated during a stereotactic radiotherapy procedure due to inappropriate reporting of stereotactic coordinates by the radiation therapy treatment planning system in units of centimeter rather than in millimeter. The authors suggest a method to detect such errors during treatment planning so they are caught and corrected prior to the patient positioning for treatment on the treatment machine. Methods: Using pretreatment imaging, the authors found that stereotactic coordinates are reported with improper linear units by a treatment planning system. The authors have implemented a redundant, independent method of stereotactic coordinate calculation. Results: Implementation of a double check of stereotactic coordinates via redundant, independent calculation is simple and accurate. Use of this technique will avoid any future error in stereotactic treatment coordinates due to improper linear units, transcription, or other similar errors. Conclusions: The authors recommend an independent double check of stereotactic treatment coordinates during the treatment planning process in order to avoid potential mistreatment of patients.

Gladstone, D. J.; Li, S.; Jarvis, L. A.; Hartford, A. C. [Division of Radiation Oncology, Department of Medicine, Dartmouth-Hitchcock Medical Center, Norris Cotton Cancer Center, Lebanon, New Hampshire 03756 (United States); Division of Radiation Oncology, Department of Medicine, Dartmouth-Hitchcock Medical Center, Norris Cotton Cancer Center, Lebanon, New Hampshire 03756 and Department of Radiation Oncology, Temple University Hospital, Philadelphia, Pennsylvania 19104 (United States); Division of Radiation Oncology, Department of Medicine, Dartmouth-Hitchcock Medical Center, Norris Cotton Cancer Center, Lebanon, New Hampshire 03756 (United States)

2011-07-15T23:59:59.000Z

327

U.S. CMS - U.S. CMS @ Work - Doing Physics - User Software & Computing -  

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

Downtimes Downtimes USCMS Tier-1 Facilities Downtimes Information on upcoming USCMS Tier-1 Facilities downtimes will be posted on this downtime webpage and on the mailing list uscmst1-downtime@fnal.gov. During data taking, we are trying to limit our downtimes to as infrequently as possible. When necessary, the downtime will generally be on a Thursday. Mon Nov 8, 2010 6 AM to midnight - Chicago time U.S. CMS at FNAL Site outage Almost all of the USCMS facility at FNAL will be affected by work we will be performing on Monday morning. Most services will be intermittent throughout the morning. This includes: Catalin/Andrey - Convert 5 cmslpc SL4 nodes into SL5 cmslpc-sl5 nodes. Configure remaining 2 SL4 nodes as direct access nodes. Lisa - Configure BlueArc scratch disk as a 6-month max lifetime

328

2014 PDSF User Meering Minutes  

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

Craig, Mike, Daniel, Iwona, Lisa OutagesDowntime 812 (all day) Migration to global homes Upcoming Downtime Eliza18 outage 97 - 98 Other Issues Old PDSF homes will be retired...

329

Electrical current suppression in Pd-doped vanadium pentoxide nanowires caused by reduction in PdO due to hydrogen exposure  

SciTech Connect

Pd nanoparticle-doped vanadium pentoxide nanowires (Pd-VONs) were synthesized. Electrical current suppression was observed when the Pd-VON was exposed to hydrogen gas, which cannot be explained by the work function changes mentioned in previous report such as Pd-doped carbon nanotubes and SnO{sub 2} nanowires. Using the x-ray photoelectron spectroscopy, we found that the reduction in PdO due to hydrogen exposure plays an important role in the current suppression of the Pd-VON.

Kim, Byung Hoon; Oh, Soon-Young; Yu, Han Young; Yun, Yong Ju; Kim, Yark Yeon; Hong, Won G. [Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700 (Korea, Republic of); Jeong, Hu Young; Lee, Jeong Yong [Department of Materials Science and Engineering, KAIST, Daejeon 305-701 (Korea, Republic of); Kim, Hae Jin [Korea Basic Science Institute, Daejeon 305-333 (Korea, Republic of)

2010-04-19T23:59:59.000Z

330

No Measurable Changes in 238U/235U due to Desorption–Adsorption of U(VI) from Groundwater at the Rifle, Colorado, Integrated Field Research Challenge Site  

Science Journals Connector (OSTI)

Uranium (U) is an element of considerable interest due to its importance for energy and weapons industries and its contribution to the risk associated with radioactive waste storage and disposal. ... (21)In the case of adsorption, where the U redox state does not change, differences between the coordination environments of the adsorbed and dissolved U(VI) species are suggested to be responsible for the isotope effect. ... We expect little isotope fractionation occurs with adsorption of uranyl carbonato and calcium-uranyl carbonato complexes, as outer-sphere complexes should not alter the local U(VI) environment. ...

Alyssa E. Shiel; Parker G. Laubach; Thomas M. Johnson; Craig C. Lundstrom; Philip E. Long; Kenneth H. Williams

2013-02-05T23:59:59.000Z

331

Laboratory investigation of MIC threat due to hydrotest using untreated seawater and subsequent exposure to pipeline fluids with and without SRB spiking  

Science Journals Connector (OSTI)

Microbiologically Influenced Corrosion (MIC) is a major threat to integrities of pipelines and storage tanks. Even though MIC during hydrotest itself may be limited due to lack of nutrients and a relatively short duration, biofilms left behind may flourish after a pipeline or storage tank is commissioned, resulting in failures due to MIC pinhole leaks over the long run. This work investigated MIC threats in simulated hydrotest with X65 coupons using untreated natural seawater and enriched artificial seawater spiked or not spiked with a laboratory strain of Sulfate Reducing Bacteria (SRB) for up to 90 days. The MIC threat after hydrotested pipes were subsequently exposed to pipeline fluids was also investigated by using simulated pipeline fluids containing a mixture of LVT-200 oil, natural seawater and CO2 or a mixture of LVT-200 oil, simulated formation water (65,000 ppm (w/w) NaCl, 22 mM SO 4 2 - ) and CO2. Tests were performed at 22 °C and 37 °C in anaerobic vials. The effectiveness of a 30 min slug of Tetrakis Hydroxymethyl Phosphonium Sulfate (THPS) treatment of the coupons right after hydrotest was also evaluated. MIC pitting was observed in simulated hydrotest using enriched artificial seawater spiked with SRB. MIC pitting was also observed on coupons exposed to simulated pipeline fluids after hydrotesting with SRB spiking using either natural seawater or enriched artificial seawater.

D. Xu; W. Huang; G. Ruschau; J. Hornemann; J. Wen; T. Gu

2013-01-01T23:59:59.000Z

332

Enrichment of the dust-to-gas mass ratio in Bondi/Jeans accretion/cloud systems due to unequal changes in dust and gas incoming velocities  

E-Print Network (OSTI)

The ratio of the Bondi and Jeans lengths is used to develop a cloud-accretion model that describes both an inner Bondi-type regime where gas pressure is balanced by the gravity of a central star and an outer Jeans-type regime where gas pressure is balanced by gas self-gravity. The gas density profile provided by this model makes a smooth transition from a wind-type inner solution to a Bonnor-Ebert type outer solution. It is shown that high-velocity dust impinging on this cloud will tend to pile-up due to having a different velocity profile than gas so that the dust-to-gas ratio is substantially enriched above the 1% ISM level.

P. M. Bellan

2008-01-27T23:59:59.000Z

333

Energy Loss of Solar p Modes due to the Excitation of Magnetic Sausage Tube Waves: Importance of Coupling the Upper Atmosphere  

Science Journals Connector (OSTI)

We consider damping and absorption of solar p modes due to their energy loss to magnetic tube waves that can freely carry energy out of the acoustic cavity. The coupling of p modes and sausage tube waves is studied in a model atmosphere composed of a polytropic interior above which lies an isothermal upper atmosphere. The sausage tube waves, excited by p modes, propagate along a magnetic fibril which is assumed to be a vertically aligned, stratified, thin magnetic flux tube. The deficit of p-mode energy is quantified through the damping rate, ?, and absorption coefficient, ?. The variation of ? and ? as a function of frequency and the tube's plasma properties is studied in detail. Previous similar studies have considered only a subphotospheric layer, modeled as a polytrope that has been truncated at the photosphere. Such studies have found that the resulting energy loss by the p modes is very sensitive to the upper boundary condition, which, due to the lack of an upper atmosphere, have been imposed in a somewhat ad hoc manner. The model presented here avoids such problems by using an isothermal layer to model the overlying atmosphere (chromosphere, and, consequently, allows us to analyze the propagation of p-mode-driven sausage waves above the photosphere. In this paper, we restrict our attention to frequencies below the acoustic cut off frequency. We demonstrate the importance of coupling all waves (acoustic, magnetic) in the subsurface solar atmosphere with the overlying atmosphere in order to accurately model the interaction of solar f and p modes with sausage tube waves. In calculating the absorption and damping of p modes, we find that for low frequencies, below ?3.5 mHz, the isothermal atmosphere, for the two-region model, behaves like a stress-free boundary condition applied at the interface (z = –z 0).

A. Gascoyne; R. Jain; B. W. Hindman

2014-01-01T23:59:59.000Z

334

EPR Line Shifts and Line Shape Changes Due to Spin Exchange of Nitroxide-Free Radicals in Liquids 4. Test of a Method to Measure Re-Encounter Rates in Liquids Employing 15N  

E-Print Network (OSTI)

ARTICLES EPR Line Shifts and Line Shape Changes Due to Spin Exchange of Nitroxide-Free Radicals, California 91330 ReceiVed: NoVember 9, 2007; In Final Form: December 16, 2007 EPR line shifts due to spin, respectively. Nonlinear least-squares fits of the EPR spectra yielded the resonance fields of the nitrogen

Bales, Barney

335

A search for TiO in the optical high-resolution transmission spectrum of HD 209458b: Hindrance due to inaccuracies in the line database  

E-Print Network (OSTI)

The spectral signature of an exoplanet can be separated from the spectrum of its host star using high-resolution spectroscopy. During such observations, the radial component of the planet's orbital velocity changes, resulting in a significant Doppler shift which allows its spectral features to be extracted. Aims: In this work, we aim to detect TiO in the optical transmission spectrum of HD 209458b. Gaseous TiO has been suggested as the cause of the thermal inversion layer invoked to explain the dayside spectrum of this planet. Method: We used archival data from the 8.2m Subaru Telescope taken with the High Dispersion Spectrograph of a transit of HD209458b in 2002. We created model transmission spectra which include absorption by TiO, and cross-correlated them with the residual spectral data after removal of the dominating stellar absorption features. We subsequently co-added the correlation signal in time, taking into account the change in Doppler shift due to the orbit of the planet. Results: We detect no si...

Hoeijmakers, H J; Snellen, I A G; Brogi, M; Birkby, J L; Schwarz, H

2014-01-01T23:59:59.000Z

336

Energy Loss of Solar $p$ Modes due to the excitation of Magnetic Sausage Tube Waves: Importance of Coupling the Upper Atmosphere  

E-Print Network (OSTI)

We consider damping and absorption of solar $p$ modes due to their energy loss to magnetic tube waves that can freely carry energy out of the acoustic cavity. The coupling of $p$ modes and sausage tube waves is studied in a model atmosphere composed of a polytropic interior above which lies an isothermal upper atmosphere. The sausage tube waves, excited by $p$ modes, propagate along a magnetic fibril which is assumed to be a vertically aligned, stratified, thin magnetic flux-tube. The deficit of $p$-mode energy is quantified through the damping rate, $\\Gamma$ and absorption coefficient, $\\alpha$. The variation of $\\Gamma$ and $\\alpha$ as a function of frequency and the tube's plasma properties is studied in detail. Previous similar studies have considered only a subphotospheric layer, modelled as a polytrope that has been truncated at the photosphere (Bogdan et al. (1996), Hindman & Jain 2008, Gascoyne et al. (2011)). Such studies have found that the resulting energy loss by the $p$ modes is very sensitiv...

Gascoyne, Andrew; Hindman, Bradley

2014-01-01T23:59:59.000Z

337

Fireside slagging, fouling, and high-temperature corrosion of heat-transfer surface due to impurities in steam-raising fuels  

Science Journals Connector (OSTI)

The process of steam raising as a source of heat or means of generating electricity using combustible fuels began with the turn of the century. From the very beginning, impurities in the fuels were responsible for added maintenance, a reduction in rate of heat transfer and corrosion due to fireside deposits of sintered or molten ash. The nature and severity of deposit formation, i.e. slagging and fouling, changed as the fuels and their impurities changed, the steam raising process evolved and the steam generators increased in size and efficiency. With the introduction of computer science, the empirical art of ash deposition from impurities in combustion gases is rapidly being transformed into the science of mineral transformation and ash deposition. This manuscript presents in chronological order an overview of the art of ash deposition while firing coal, the mechanistic approach to the problem, the recent introduction of sophisticated analytical procedures, and modeling of mineral transformations, and ash deposition underway. Adaptation of fuels such as ash oil, petroleum coke, municipal waste, wood and biomass to the steam raising process are presented individually in the order in which they were introduced. Empirical indices presently used to characterize the slagging or fouling potentials of impurities in fuels are present. Fundamental data are provided where necessary to illustrate mechanisms for ash deposition. An extensive list of key references is offered for those wishing to investigate details of any particular aspect of fireside slagging, fouling or corrosion.

Richard W. Bryers

1996-01-01T23:59:59.000Z

338

Direct observation of the effective bending moduli of a fluid membrane: Free-energy cost due to the reference-plane deformations  

Science Journals Connector (OSTI)

Effective bending moduli of a fluid membrane are investigated by means of the transfer-matrix method developed in our preceding paper. This method allows us to survey various statistical measures for the partition sum. The role of the statistical measures is arousing much attention, since Pinnow and Helfrich claimed that under a suitable statistical measure, that is, the local mean curvature, the fluid membranes are stiffened, rather than softened, by thermal undulations. In this paper, we propose an efficient method to observe the effective bending moduli directly: We subjected a fluid membrane to a curved reference plane, and from the free-energy cost due to the reference-plane deformations, we read off the effective bending moduli. Accepting the mean-curvature measure, we found that the effective bending rigidity gains even in the case of very flexible membrane (small bare rigidity); it has been rather controversial that for such a nonperturbative regime, the analytical prediction does apply. We also incorporate the Gaussian-curvature modulus and calculated its effective rigidity. Thereby, we found that the effective Gaussian-curvature modulus stays almost scale invariant. All these features are contrasted with the results under the normal-displacement measure.

Yoshihiro Nishiyama

2003-09-03T23:59:59.000Z

339

Direct observation of the effective bending moduli of a fluid membrane: Free-energy cost due to the reference-plane deformations  

E-Print Network (OSTI)

Effective bending moduli of a fluid membrane are investigated by means of the transfer-matrix method developed in our preceding paper. This method allows us to survey various statistical measures for the partition sum. The role of the statistical measures is arousing much attention, since Pinnow and Helfrich claimed that under a suitable statistical measure, that is, the local mean curvature, the fluid membranes are stiffened, rather than softened, by thermal undulations. In this paper, we propose an efficient method to observe the effective bending moduli directly: We subjected a fluid membrane to a curved reference plane, and from the free-energy cost due to the reference-plane deformations, we read off the effective bending moduli. Accepting the mean-curvature measure, we found that the effective bending rigidity gains even in the case of very flexible membrane (small bare rigidity); it has been rather controversial that for such non-perturbative regime, the analytical prediction does apply. We also incorporate the Gaussian-curvature modulus, and calculated its effective rigidity. Thereby, we found that the effective Gaussian-curvature modulus stays almost scale-invariant. All these features are contrasted with the results under the normal-displacement measure.

Yoshihiro Nishiyama

2003-07-10T23:59:59.000Z

340

137Cs in Urine of Tourists Who Visited Kiev Late in April, 1986. —Estimation of the Intake of 137Cs and 239Pu: Due to the Nuclear Reactor Accident—  

Science Journals Connector (OSTI)

......Urine of Tourists Who Visited Kiev Late in April, 1986. -Estimation of the Intake of 137Cs and 239Pu: Due to the Nuclear Reactor Accident- Teruhisa Watabe Kohki Sugawara * Division of Radioecology, Laboratory for Radioecology, Isozaki 3609......

Teruhisa Watabe; Kohki Sugawara

1987-06-01T23:59:59.000Z

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341

An Instability due to the Nonlinear Coupling of p-modes to g-modes: Implications for Coalescing Neutron Star Binaries  

Science Journals Connector (OSTI)

A weakly nonlinear fluid wave propagating within a star can be unstable to three-wave interactions. The resonant parametric instability is a well-known form of three-wave interaction in which a primary wave of frequency ? a excites a pair of secondary waves of frequency ? b + ? c ? a . Here we consider a nonresonant form of three-wave interaction in which a low-frequency primary wave excites a high-frequency p-mode and a low-frequency g-mode such that ? b + ? c ? a . We show that a p-mode can couple so strongly to a g-mode of similar radial wavelength that this type of nonresonant interaction is unstable even if the primary wave amplitude is small. As an application, we analyze the stability of the tide in coalescing neutron star binaries to p-g mode coupling. We find that the equilibrium tide and dynamical tide are both p-g unstable at gravitational wave frequencies f gw 20 Hz and drive short wavelength p-g mode pairs to significant energies on very short timescales (much less than the orbital decay time due to gravitational radiation). Resonant parametric coupling to the tide is, by contrast, either stable or drives modes at a much smaller rate. We do not solve for the saturation of the p-g instability and therefore we cannot say precisely how it influences the evolution of neutron star binaries. However, we show that if even a single daughter mode saturates near its wave breaking amplitude, the p-g instability of the equilibrium tide will (1) induce significant orbital phase errors (? 1 radian) that accumulate primarily at low frequencies (f gw 50 Hz) and (2) heat the neutron star core to a temperature of T ~ 1010 K. Since there are at least ~100 unstable p-g daughter pairs, ? and T are potentially much larger than these values. Tides might therefore significantly influence the gravitational wave signal and electromagnetic emission from coalescing neutron star binaries at much larger orbital separations than previously thought.

Nevin N. Weinberg; Phil Arras; Joshua Burkart

2013-01-01T23:59:59.000Z

342

RAPID/Roadmap/4-OR-a | Open Energy Information  

Open Energy Info (EERE)

4-OR-a.14 - Investigate Exploration Operations as Necessary The Division may conduct scheduled and unscheduled inspections of operations conducted under exploration...

343

Microsoft PowerPoint - Webbers Brief June 2009 Final1.ppt  

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

Webbers Falls Major Rehab Webbers Falls Major Rehab 6292009 3 * Webbers Falls powerhouse unscheduled major breakdowns: * 977-379 - generator failure - Unit 3 * 480-283 -...

344

Treatment of resonances in the scattering of a heavy positron by H{sub 2} that are due to interaction with vibrationally excited quasibound states  

SciTech Connect

For a positron with wave number k, the rate of annihilation when scattered by an atom or molecule is proportional to Z{sub eff}(k), the effective number of electrons in the target that are available to the positron for annihilation. There is currently great interest in the very large positron annihilation rates, and hence values of Z{sub eff}(k), that have been observed in low-energy positron scattering by some molecules. These are observed experimentally to occur at energies just below the energies of excited vibrational states of the molecule concerned. This has been explained by Gribakin [Phys. Rev. A 61, 022720 (2000)] and Gribakin and Lee [Phys. Rev. Lett. 97, 193201 (2006)] as being due to Feshbach resonances involving excited quasibound vibrational states. These treatments make skilful use of approximate methods. It is of interest to determine how the expression obtained for the resonant contribution to Z{sub eff}(k) from a quasibound state using a very accurate method is related to the expressions obtained in the previously mentioned articles. In view of this, in this article I carry out a detailed ab initio theoretical treatment of positron scattering by H{sub 2} using the Kohn variational method. H{sub 2} is the simplest molecule, which makes it easier to take into account all the interactions involved. However, a positron does not form a bound state with H{sub 2}. To investigate resonant behavior in Z{sub eff}(k), I increase the mass m{sub p} of the positron so that it forms a weakly bound state with H{sub 2}. This gives rise to excited quasibound vibrational states. The expression I obtain for the resonant contribution to Z{sub eff}(k) has some similarity with the expressions obtained by Gribakin and Lee. This gives some support to their explanation of the very large values of Z{sub eff}(k). However, they make no explicit mention of corrections to the Born-Oppenheimer (BO) approximation. These play a key role in my treatment as they couple the quasibound states to the continuum. I am able to show how the BO corrections are taken into account implicitly in calculating the expressions obtained by Gribakin and Lee. The most important difference between my treatment and their treatments is that in my treatment Z{sub eff}(k) may be infinite at the resonant energy, whereas in the other treatments it is likely to be large, but can never be infinite. Further investigation is necessary to determine the origin of this infinity in my treatment. My treatment could be applied to positron scattering by molecules such as methyl halides in which very high Z{sub eff}(k) values are observed, though using the Kohn variational method would be considerably more complicated than in the case of H{sub 2}.

Armour, E. A. G. [School of Mathematical Sciences, University of Nottingham, Nottingham NG7 2RD (United Kingdom)

2010-10-15T23:59:59.000Z

345

Opportunities, Barriers and Actions for Industrial Demand Response in California  

SciTech Connect

In 2006 the Demand Response Research Center (DRRC) formed an Industrial Demand Response Team to investigate opportunities and barriers to implementation of Automated Demand Response (Auto-DR) systems in California industries. Auto-DR is an open, interoperable communications and technology platform designed to: Provide customers with automated, electronic price and reliability signals; Provide customers with capability to automate customized DR strategies; Automate DR, providing utilities with dispatchable operational capability similar to conventional generation resources. This research began with a review of previous Auto-DR research on the commercial sector. Implementing Auto-DR in industry presents a number of challenges, both practical and perceived. Some of these include: the variation in loads and processes across and within sectors, resource-dependent loading patterns that are driven by outside factors such as customer orders or time-critical processing (e.g. tomato canning), the perceived lack of control inherent in the term 'Auto-DR', and aversion to risk, especially unscheduled downtime. While industry has demonstrated a willingness to temporarily provide large sheds and shifts to maintain grid reliability and be a good corporate citizen, the drivers for widespread Auto-DR will likely differ. Ultimately, most industrial facilities will balance the real and perceived risks associated with Auto-DR against the potential for economic gain through favorable pricing or incentives. Auto-DR, as with any ongoing industrial activity, will need to function effectively within market structures. The goal of the industrial research is to facilitate deployment of industrial Auto-DR that is economically attractive and technologically feasible. Automation will make DR: More visible by providing greater transparency through two-way end-to-end communication of DR signals from end-use customers; More repeatable, reliable, and persistent because the automated controls strategies that are 'hardened' and pre-programmed into facility's software and hardware; More affordable because automation can help reduce labor costs associated with manual DR strategies initiated by facility staff and can be used for long-term.

McKane, Aimee T.; Piette, Mary Ann; Faulkner, David; Ghatikar, Girish; Radspieler Jr., Anthony; Adesola, Bunmi; Murtishaw, Scott; Kiliccote, Sila

2008-01-31T23:59:59.000Z

346

Physics 227 Winter, 1998 Problem Set 4 Due date: Monday, February 2 4.1 Energy current and the Poynting vector This problem is intended to integrate things you covered last  

E-Print Network (OSTI)

Physics 227 Winter, 1998 Problem Set 4 Due date: Monday, February 2 4.1 Energy current) Relate this flux to the rate of energy dissipation in the resistor. 4.2 transformation of velocity piece of material that gives an electrical signal when a cosmic ray passes through it. Two

Witten, Thomas A.

347

Math 100 --Matlab Assignment 1, due at the end of class on Sept.2, 2010 In order to save both your commands and their output while working in the Command window  

E-Print Network (OSTI)

Math 100 -- Matlab Assignment 1, due at the end of class on Sept.2, 2010 In order to save both your file (a simple text file that you can view with any text editor, such as the Matlab Editor). Before you start doing any of the following assignments do the following: · Make sure you know Matlab's "Current

Fasshauer, Greg

348

EPS Conf. on Contr. Fusion and Plasma Physics, Maastricht, 14 -18 June 1999 ECA Vol.23J (1999) 949 -952 Regeneration of Wave Perturbation in the Ionosphere due to Plasma  

E-Print Network (OSTI)

a powerful radio wave from a Earth- based radio transmitter,operating in the high frequency (HF) range) 949 - 952 949 Regeneration of Wave Perturbation in the Ionosphere due to Plasma Kinetic Effects University, EURATOM/NFR Fusion Association, S -755 91 Uppsala, Sweden 2 Institute for Nuclear Research

349

RECENT PROCESS AND EQUIPMENT IMPROVEMENTS TO INCREASE HIGH LEVEL WASTE THROUGHPUT AT THE DEFENSE WASTE PROCESSING FACILITY  

SciTech Connect

The Savannah River Site's (SRS) Defense Waste Processing Facility (DWPF) began stabilizing high level waste (HLW) in a glass matrix in 1996. Over the past few years, there have been several process and equipment improvements at the DWPF to increase the rate at which the high level waste can be stabilized. These improvements have either directly increased waste processing rates or have desensitized the process to upsets, thereby minimizing downtime and increasing production. Improvements due to optimization of waste throughput with increased HLW loading of the glass resulted in a 6% waste throughput increase based upon operational efficiencies. Improvements in canister production include the pour spout heated bellows liner (5%), glass surge (siphon) protection software (2%), melter feed pump software logic change to prevent spurious interlocks of the feed pump with subsequent dilution of feed stock (2%) and optimization of the steam atomized scrubber (SAS) operation to minimize downtime (3%) for a total increase in canister production of 12%. A number of process recovery efforts have allowed continued operation. These include the off gas system pluggage and restoration, slurry mix evaporator (SME) tank repair and replacement, remote cleaning of melter top head center nozzle, remote melter internal inspection, SAS pump J-Tube recovery, inadvertent pour scenario resolutions, dome heater transformer bus bar cooling water leak repair and new Infra-red camera for determination of glass height in the canister are discussed.

Odriscoll, R; Allan Barnes, A; Jim Coleman, J; Timothy Glover, T; Robert Hopkins, R; Dan Iverson, D; Jeff Leita, J

2008-01-15T23:59:59.000Z

350

Untitled Page  

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

Environmental Reporting Requirements Environmental Reporting Requirements (To filter the table, type a word or phrase in the boxes below that corresponds with the column you would like to filter. Example, in the box above Report type "monitoring", then select the Go button or use the Enter key on your keyboard) (To reset your filter delete the contents from the boxes and select the Go button or the Enter key) Report Type-Scheduled Unscheduled Frequency Due Date Origin of Requirement Reference Preparing Organization(s) Reviewing Organization(s) Recipient(s) Semiannual Volatile Organic Compound (VOC ) Monitoring Hydrogen-Methane Report S Semiannually 26-Oct and 26-Apr NMHWA HWFP IV.F.2.b The Permittees shall report to the Secretary semiannually, beginning twelve months after issuance of this Permit, The data and analysis of the VOC Monitoring Plan.

351

High Flux Isotope Reactor quarterly report, January-March 1986  

SciTech Connect

Four routine cycles of operation were completed during the first quarter. Four scheduled end-of-cycle shutdowns and two unscheduled shutdowns resulted in an on-stream time of 86.9%. An unscheduled control plate and control cylinder replacement was performed after tantalum contamination in the primary coolant system was traced to the inner cylinder.

Corbett, B.L.; Farrar, M.B.

1986-06-01T23:59:59.000Z

352

Problems #3, Math 204, Dr. M. Bohner. Sep 10, 2003. Due Sep 15, 11 am. 12. A tank has ten gallons of water in which two pounds of salt has been dissolved. Brine with  

E-Print Network (OSTI)

Problems #3, Math 204, Dr. M. Bohner. Sep 10, 2003. Due Sep 15, 11 am. 12. A tank has ten gallons through the supplementary homework problems for Chapters 1­2: 1, 3 of Section 1.1; 1 of Section 1.2; 1-8, 14, 15, 17, 19, 21, 25, 26 of Section 1.3; 1, 3, 4, 13­17, 21, 26, 29 of Section 2.1; 1, 4­8, 9, 11

Bohner, Martin

353

Fatality Due to Acute ?-Methyltryptamine Intoxication  

Science Journals Connector (OSTI)

......casein Miami involved a young college student who...reports on drug-related internet web- sites, it has...Unfortunately,the use and abuse of AMTis expectedto in...alpha-Methyltryptamine revisited via easy Internet access. Vet. Hum...FOXY and AMT as drugs of abuse. Drug Intelligence Report......

Diane M. Boland; Wilmo Andollo; George W. Hime; W. Lee Hearn

2005-01-01T23:59:59.000Z

354

Endocarditis Due to Rare and Fastidious Bacteria  

Science Journals Connector (OSTI)

...1966 to 1999 using Internet Grateful Med search...to be pathogens in young adults after dental...drug use and alcohol abuse should be evaluated...80 emboli (20) Young middle-aged adults...veterinarians, 6 alcohol abuse Clostridium spp...arthritis; emboli (71) Young middle age; IVDU...

P. Brouqui; D. Raoult

2001-01-01T23:59:59.000Z

355

Fatality Due to Acute ?-Methyltryptamine Intoxication  

Science Journals Connector (OSTI)

......availability ofAMTfor purchase via the Internet prior to April 2003 (3...Unfortunately,the use and abuse of AMTis expectedto in- crease...alpha-Methyltryptamine revisited via easy Internet access. Vet. Hum. Toxicol...emergenceof FOXY and AMT as drugs of abuse. Drug Intelligence Report......

Diane M. Boland; Wilmo Andollo; George W. Hime; W. Lee Hearn

2005-01-01T23:59:59.000Z

356

Endocarditis Due to Rare and Fastidious Bacteria  

Science Journals Connector (OSTI)

...search from 1966 to 1999 using Internet Grateful Med search V2.6...intravenous drug use and alcohol abuse should be evaluated. Intravenous...11 veterinarians, 6 alcohol abuse Clostridium spp. Fever; emboli...in 40 of patients, alcohol abuse is found in 33, and other sources...

P. Brouqui; D. Raoult

2001-01-01T23:59:59.000Z

357

SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL  

E-Print Network (OSTI)

Imperial Valley in California; the Cerro Prieto geothermalImperial Valley, California,~~~ Proceedings, First Symposium on the Cerro Prieto Geothermal

Narasimhan, T.N.

2013-01-01T23:59:59.000Z

358

Internal Fissuring of Wheat due to Weathering  

Science Journals Connector (OSTI)

... . Weathered grain loses this sheen and colour, and the kernels present a faded and roughened appearance. This condition is known to be caused by wetting of the mature grain ...

MAX MILNER; J. A. SHELLENBERGER; M. R. LEE; ROBERT KATZ

1952-09-27T23:59:59.000Z

359

Inadvertent Climate Modification Due to Anthropogenic Lead  

SciTech Connect

The relationship between atmospheric particulate matter and the formation of clouds is among the most uncertain aspects of our current understanding of climate change1. One specific question that remains unanswered is how anthropogenic particulate emissions are affecting the nucleation of ice crystals. Satellites show ice clouds cover more than a third of the globe2 and models suggest that ice nucleation initiates the majority of terrestrial precipitation3. It is therefore not possible to adequately understand either climate change or the global water cycle without understanding ice nucleation. Here we show that lead-containing particles are among the most efficient ice nucleating substances commonly found in the atmosphere. Field observations were conducted with mass spectrometry and electron microscopy at two remote stations on different continents, far removed from local emissions. Laboratory studies within two cloud chambers using controlled experimental conditions support the field data. Because the dominate sources of particulate lead are anthropogenic emissions such as aviation fuel, power generation, smelting, and the re-suspension of residue from tetra-ethyl leaded gasoline4, it is likely that cloud formation and precipitation have been affected when compared to pre-industrial times. A global climate model comparing pre-industrial and anthropogenically perturbed conditions shows that lead-containing particles may be increasing the outgoing longwave radiation by 0.2 to 0.8 W m-2, thereby offsetting a portion of the warming attributed to greenhouse gases1.

Cziczo, Daniel J.; Stetzer, Olaf; Worringen, Annette; Ebert, Martin; Weinbruch, Stephan; Kamphus, M.; Gallavardin, S. J.; Curtius, J.; Borrmann, S.; Froyd, Karl D.; Mertes, S.; Mohler, Ottmar; Lohmann, U.

2009-05-01T23:59:59.000Z

360

In Due Time: The Courts and Backlash  

E-Print Network (OSTI)

in their study of “Midway,” 14 that 95% of superintendentsand Schempp. In surveys, Midway teachers stated that theyof the school districts in Midway distributed Gideon bibles

Gash, Alison

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "unscheduled downtime due" 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

MODELING SUBSIDENCE DUE TO GEOTHERMAL FLUID PRODUCTION  

E-Print Network (OSTI)

Applications o f Geothermal Energy and t h e i r Place i n tcompaction, computers, geothermal energy, pore-waterf o r developing geothermal energy i n the United States (

Lippmann, M.J.

2011-01-01T23:59:59.000Z

362

SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL  

E-Print Network (OSTI)

the potential use of geothermal energy for power generation47. Boldizsar, T. , 1970, "Geothermal energy production fromCoast Geopressure Geothermal Energy Conference, M.H. Dorfman

Narasimhan, T.N.

2013-01-01T23:59:59.000Z

363

Acoustic radiation due to surface wave breaking.  

Science Journals Connector (OSTI)

While wave breaking is continually occurring at the sea surface its transient and sporadic nature makes it difficult to measure. Experimental results are presented that show how acoustic methods can be used as a remote sensor of this fundamental process. Sea surface?generated acoustic radiation (40 to 4000 Hz) is directly related to a quantitative measure of the boundary dynamics; i.e. the Toba variable. The frequency spectrum of the radiation remains remarkably unchanged over a wide range of environmental conditions but the correlation between the sound pressure level and the Toba variable undergoes an abrupt change when spilling breakers start to occur. Results support the use of acoustics to remotely measure the rate of energy being dissipated by wave breaking and the wavelength of the dominant gravity wave component. Theoretical studies have related the field measurements to analytical and laboratory results cited in the literature indicating that remote monitoring of the rate of occurrence and size distribution of ‘‘infant’’ (freshly entrained) bubbles may be possible if splashes on the surface do not radiate significant sound. Signal processing algorithms for the remote measurements discussed above are enhanced by eigenstructure analysis of the measured cross?spectral density matrix. [Work sponsored by ONR and NUSC.

Robert M. Kennedy; Stewart A. L. Glegg

1992-01-01T23:59:59.000Z

364

SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL  

E-Print Network (OSTI)

Environmental Effects of Geothermal Power Production, 11the potential use of geothermal energy for power generationlargest producer of geothermal electric power in the world.

Narasimhan, T.N.

2013-01-01T23:59:59.000Z

365

Programming Assignment 1: Due Monday, Sept. 19  

E-Print Network (OSTI)

'm using vim. You may want to edit on a different machine and copy to water, but keep in mind that you'll need a fast edit-compile-execute path. Or you can try vim, too. 09/08/2011" CS4961" #12;

Hall, Mary W.

366

Potential oxidative stress due to Pb exposure  

E-Print Network (OSTI)

increases in oxidation of glutathione in K562 myelogenous leukemia cells at low Pb levels. The approach consisted of incubating K562 cells in solutions of 0, 300, and 700 ppb Pb dissolved in RPMI cell medium for a total of 96 hours. After this period...

Elms, Rene' Davina

2013-02-22T23:59:59.000Z

367

Assignment 9 due March 31, 2011  

E-Print Network (OSTI)

on the interval [-2,3] (spacing =0.5). Remember to use a polynomial of degree 20. (b) Plot the polynomial and the function f(t) together on the interval [-2,3]. Use a grid spacing of 0.01. (c) About what is the largest value of the error |p(t)-f(t)| on that interval? At what point does it occur? (d Why would one expect

Byrd, Richard

368

MODELING SUBSIDENCE DUE TO GEOTHERMAL FLUID PRODUCTION  

E-Print Network (OSTI)

compaction, computers, geothermal energy, pore-waterf o r developing geothermal energy i n the United States (Applications o f Geothermal Energy and t h e i r Place i n t

Lippmann, M.J.

2011-01-01T23:59:59.000Z

369

SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL  

E-Print Network (OSTI)

the potential use of geothermal energy for power generationCoast Geopressure Geothermal Energy Conference, M.H. Dorfmanand Otte, C. , 1976, Geothermal energy-resources production,

Narasimhan, T.N.

2013-01-01T23:59:59.000Z

370

Characterizing orbit uncertainty due to atmospheric uncertainty  

E-Print Network (OSTI)

transition matrix which can be determined by the following: 4(t, tQ) = A 4'(i, tQ), (3. 17) where A can be determined from Eq. (3. 4) as Of(z) Ox (3. 18) and C (tQ, tQ) is the identity matrix. We can propagate just the state by using x(t ) = e(t, tQ) x(tQ... transition matrix which can be determined by the following: 4(t, tQ) = A 4'(i, tQ), (3. 17) where A can be determined from Eq. (3. 4) as Of(z) Ox (3. 18) and C (tQ, tQ) is the identity matrix. We can propagate just the state by using x(t ) = e(t, tQ) x(tQ...

Wilkins, Matthew Paul

2012-06-07T23:59:59.000Z

371

SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL  

E-Print Network (OSTI)

measurements in geothermal wells," Proceedings, Secondin Larderello Region geothermal wells for reconstruction of

Narasimhan, T.N.

2013-01-01T23:59:59.000Z

372

SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL  

E-Print Network (OSTI)

faults and wells, Cerro Prieto geothermal field, Mexico (faults and wells, Cerro Prieto geothermal field, Mexico (geothermal system in Mexico and the Pleasant Bayou exploratory geopressured well

Narasimhan, T.N.

2013-01-01T23:59:59.000Z

373

special thanks are due: Ana Begoa Armengod  

E-Print Network (OSTI)

advertising- whether simply using the standard horizontal rectangle as a springboard for messaging-carved prints, illustrates a hardly imaginary, bleak landscape where pollutants permeate national and class a humorous approach, such as Colin Matthes' bold, sardonic "Gladiator" advertisement for a portable border

Shewchuk, Jonathan

374

NETL Researcher Honored with 2013 Federal Laboratory Consortium...  

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

reduce shutdowns and downtime, and reduce the risk and cost of equipment damage. The 3D virtual energy plant simulator is available to third parties for internal training...

375

NETL Researcher Honored with 2013 Federal Laboratory Award Morgantown...  

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

reduce shutdowns and downtime, and reduce the risk and cost of equipment damage. The 3D virtual energy plant simulator is available to third parties for internal training...

376

America's Next Top Energy Innovator Runner-Up Presents Hydrogen...  

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

gas. The refinery capacity has always been a premium and down time in the oil and gas industry is always costly. Keeping equipment running and minimizing downtime is...

377

gasification index | netl.doe.gov  

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

service life and reduced downtime for gasifier repair. Refractory Improvement Coal and petcoke, common carbon feedstock in slagging gasifiers, are typically high in mineral...

378

System and Method for Sealing a Vapor Deposition Source - Energy...  

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

costs and minimizes system downtime for cleaning Applications and Industries Thin film solar Deposition of any thin film Patents and Patent Applications ID Number Title and...

379

Maintenance | OpenEI Community  

Open Energy Info (EERE)

sparql and community will continue to function normally. Additionally, web services that rely on Ask queries (utility rate database API) may have some downtime as we transition....

380

September 28, 2010  

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

this morning - logins were hanging. The memory problem was fixed but another kernel patch is needed. Upcoming downtimes: Nothing scheduled but will do a rolling upgrade of the...

Note: This page contains sample records for the topic "unscheduled downtime due" 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

September 14, 2010  

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

buffers - mainly ALICE - which requires a reboot. The fix has been identified (kernel patch) and is being done. Upcoming downtimes: Nothing scheduled but will do new home and...

382

High-Power Converters and AC Drives IEEE PESC2005 Tutorial  

E-Print Network (OSTI)

Overview · MV Drive Applications Industry Application Examples Petrochemical Pipeline pumps, gas protection Self commissioning Minimum down-time for repairs Small footprint N+1 redundancy (optional) Dynamic

Wu, Bin

383

SILVER--2003 68.1 References that include a section mark () are found in the Internet  

E-Print Network (OSTI)

reduction in byproduct silver generated at copper mines. Downtime at Kennecott Utah Copper Corp.'s Bingham Canyon Mine reduced productio

384

Electricity cost saving comparison due to tariff change and ice thermal storage (ITS) usage based on a hybrid centrifugal-ITS system for buildings: A university district cooling perspective  

Science Journals Connector (OSTI)

Abstract In this paper, the case study of a district cooling system of a university located in a South East Asia region (lat: 01°29?; long: 110°20?E) is presented. In general, the university has high peak ambient temperature of around 32–35 °C coupled with high humidity of about 85% during afternoon period. The total electricity charge for the Universiti Malaysia Sarawak Campus is very high amounting to more than $314,911 per month. In this paper, a few district cooling schemes are investigated to provide “what-if analysis” and in order to minimize the overall electricity charges. Few scenarios designed for the application of centrifugal with and without ice-thermal storage (ITS) systems on the buildings were investigated. It was found that, due to the local tariff status, marginally saving can be achieved in the range of 0.08–3.13% if a new tariff is adopted; and a total of further saving of 1.26–2.43% if ITS is operated. This marginally saving is mainly due to the local tariff conditions and lower local temperature range (?T) which are less favorable as compared with those reported in the literature elsewhere.

Mohammad Omar Abdullah; Lim Pai Yii; Ervina Junaidi; Ghazali Tambi; Mohd Asrul Mustapha

2013-01-01T23:59:59.000Z

385

Probabilistic analysis and operational data in response to NUREG-0737, Item II. K. 3. 2 for Westinghouse NSSS plants. [Modifications to reduce LOCA due to stuck-open power-operated relief valve  

SciTech Connect

This report describes various modifications to Westinghouse plants since TMI and, using probabilistic analysis via event trees, estimates the effect of the post-TMI changes, including an automatic (PORV) (power operated relief valve) isolation concept identified in NUREG-0731 item II.K.3.1. The requested safety valve operational data is included as an appendix. A significant reduction in the frequency of a small break LOCA, due to a stuck open PORV has already been achieved by the modifications made subsequent to TMI. Domestic Westinghouse operating plant data (based on 181 reactor years of operation) has been collected and evaluated. An auto block valve closure system has been evaluated. The analysis is generally applicable to all Westinghouse plants which have incorporated the post-TMI hardware and procedural changes relative to stuck-open PORVs.

Wood, D.C.; Gottshall, C.L.

1981-02-01T23:59:59.000Z

386

DUE DILIGENCE CHECKLIST Page 1 of 2 What is the standard of due diligence?  

E-Print Network (OSTI)

.g. Lockout, WHMIS) r Inspection reports and records of corrective actions taken to solve problems r Incident, lockout, bloodborne pathogens, confined space, falls from elevation, chemical hazards, repetitive strain

Northern British Columbia, University of

387

Microsoft PowerPoint - EM Waste 10-03 Processing Technical Exchange Antifoam 11-17-2010.ppt  

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

664, Rev A 664, Rev A Improved Antifoam Agents for SRS Dan Lambert Fellow Engineer, SRNL Dr Darsh T. Wasan, Dr. Alex D. Nikolov, Illinois Institute of Technology EM Waste Processing Technical Exchange Session 10: Advanced Unit Operations and Scaling Print Close 2 SRNL-STI-2010-00698, Rev A Outline Needs/Benefits Background Scope Experimental/Method Results Future work Process Technology Programs Print Close 3 SRNL-STI-2010-00698, Rev A Needs/Benefits Needs: Increase waste processing (melter) throughput Benefits: Maximize Boilup Rate during waste processing at boiling, resulting in an increase in a reduction in overall processing time. Minimize carryover of insoluble solids, resulting in less facility downtime due to foamover into condensate. Process Technology Programs Print Close

388

Advanced Testing Techniques to Measure the PWSCC Resistance of Alloy 690 and its Weld Metals  

SciTech Connect

Wrought Alloy 600 and its weld metals (Alloy 182 and Alloy 82) were originally used in pressurized water reactors (PWRs) due to the material's inherent resistance to general corrosion in a number of aggressive environments and because of a coefficient of thermal expansion that is very close to that of low alloy and carbon steel. Over the last thirty years, stress corrosion cracking in PWR primary water (PWSCC) has been observed in numerous Alloy 600 component items and associated welds, sometimes after relatively long incubation times. The occurrence of PWSCC has been responsible for significant downtime and replacement power costs. As part of an ongoing, comprehensive program involving utilities, reactor vendors and engineering/research organizations, this report will help to ensure that corrosion degradation of nickel-base alloys does not limit service life and that full benefit can be obtained from improved designs for both replacement components and new reactors.

P.Andreson

2004-10-01T23:59:59.000Z

389

Corrosion of Chromium-Rich Oxide Refractories in Molten Waste Glasses  

SciTech Connect

The DOE is faced with a wide variety of waste treatment problems throughout the complex. The diversity in physical, chemical, and radiological characteristics of these waste streams will necessitate an array of treatment technologies since, at present, there exists no single solution. Thermal treatment technologies have an important, but by no means singular, role to play in addressing this problem since they generally offer the potential for significant volume reductions, leach resistant waste forms, considerable versatility, and are relatively well developed. In particular, DOE has made significant investments in the development and deployment of vitrification technologies for the treatment of high-level nuclear wastes and, more recently, for mixed wastes. The general area of materials of construction is especially important for thermal processes due to the inherently high-temperature and the often-corrosive environments involved. The performance of these materials directly impacts treatment costs since this determines maintenance downtime and the useful service life of the treatment unit.

Hao Gan; Xiaodong Lu; Andrew C. Buechele; M. Catherine Paul; Ian L. Pegg

2002-03-20T23:59:59.000Z

390

Maximising Longwall performance and profitability by the introduction of moving car bunker systems into outbye haulage layouts  

SciTech Connect

In order to maximize the profitability of Longwall mining operations, outbye materials handling systems should be cost effectively engineered to both fully harmonize with cyclical surges in output and to maintain high levels of availability. With the introduction of new Longwall systems into existing mines, the upgrading of outbye haulage to handle peak production from the Longwall panel can prove to be extremely expensive and is often unnecessary. In addition, despite high levels of investment in new equipment, many mines are still failing to achieve planned gains in Longwall productivity due to persistent downtime on outbye haulage routes. This paper details the planning, production and engineering considerations necessary to maximize profitability by the introduction of moving car bunker systems to underground haulage layouts. It also examines case studies of recent installations within the North American coal mining industry and charts the significant success being achieved in improving profitability at these mines.

Barlow, P.M.

1996-12-31T23:59:59.000Z

391

SPEAR III: A brighter source at SSRL  

SciTech Connect

By replacing the magnets and vacuum chamber for the 3 GeV SPEAR II storage ring, the natural emittance of the machine can be reduced from 130 to 18 nm-rad and the stored current can be raised from 100 to 200 mA with a 50 h lifetime. This configuration increases focused photon flux for insertion device beamlines by an order of magnitude and the photon brightness for future undulators would exceed 10{sup 18} at 5 keV. Due to a higher critical energy, the photon flux in the 20 keV range for bending magnet beamlines increases by more than two orders of magnitude. We present preliminary SPEAR III design study results and plans to implement the facility upgrade with minimal downtime for SSRL users.

Hettel, R.; Boyce, R.; Brennan, S. [and others

1997-06-02T23:59:59.000Z

392

Failure Scenarios and Mitigations and for the BaBar Superconducting Solenoid  

SciTech Connect

The cryogenic department at the Stanford Linear Accelerator Center is responsible for the operation, troubleshooting, and upgrade of the 1.5 Tesla superconducting solenoid detector for the BABAR B-factory experiment. Events that disable the detector are rare but significantly impact the availability of the detector for physics research. As a result, a number of systems and procedures have been developed over time to minimize the downtime of the detector, for example improved control systems, improved and automatic backup systems, and spares for all major components. Together they can prevent or mitigate many of the failures experienced by the utilities, mechanical systems, controls and instrumentation. In this paper we describe various failure scenarios, their effect on the detector, and the modifications made to mitigate the effects of the failure. As a result of these modifications the reliability of the detector has increased significantly with only 3 shutdowns of the detector due to cryogenics systems over the last 2 years.

Thompson, EunJoo; Candia, A.; Craddock, W.W.; Racine, M.; Weisend, J.G., II; /SLAC

2005-12-13T23:59:59.000Z

393

A Framework to Identify the Sustainable and Resilient Zone of  

E-Print Network (OSTI)

and S6 are shown as example. Downtime in Days #12;Downtime and Cost of Mitigation #12;Avoided Cost Determine Mitigation Cost and Avoided Damage Perform EIOLCA on both Mitigation Cost and Damage Emissions? · Financial Perspective: ­ Approach: · Benefit : Cost Analysis ­ Tool: · FEMA BCA V4.8 Toolkit

Das, Suman

394

Computation of the free energy due to electron density fluctuation of a solute in solution: A QM/MM method with perturbation approach combined with a theory of solutions  

SciTech Connect

We developed a perturbation approach to compute solvation free energy ?? within the framework of QM (quantum mechanical)/MM (molecular mechanical) method combined with a theory of energy representation (QM/MM-ER). The energy shift ? of the whole system due to the electronic polarization of the solute is evaluated using the second-order perturbation theory (PT2), where the electric field formed by surrounding solvent molecules is treated as the perturbation to the electronic Hamiltonian of the isolated solute. The point of our approach is that the energy shift ?, thus obtained, is to be adopted for a novel energy coordinate of the distribution functions which serve as fundamental variables in the free energy functional developed in our previous work. The most time-consuming part in the QM/MM-ER simulation can be, thus, avoided without serious loss of accuracy. For our benchmark set of molecules, it is demonstrated that the PT2 approach coupled with QM/MM-ER gives hydration free energies in excellent agreements with those given by the conventional method utilizing the Kohn-Sham SCF procedure except for a few molecules in the benchmark set. A variant of the approach is also proposed to deal with such difficulties associated with the problematic systems. The present approach is also advantageous to parallel implementations. We examined the parallel efficiency of our PT2 code on multi-core processors and found that the speedup increases almost linearly with respect to the number of cores. Thus, it was demonstrated that QM/MM-ER coupled with PT2 deserves practical applications to systems of interest.

Suzuoka, Daiki; Takahashi, Hideaki, E-mail: hideaki@m.tohoku.ac.jp; Morita, Akihiro [Department of Chemistry, Graduate School of Science, Tohoku University, Sendai Miyagi 980-8578 (Japan)] [Department of Chemistry, Graduate School of Science, Tohoku University, Sendai Miyagi 980-8578 (Japan)

2014-04-07T23:59:59.000Z

395

Study of the H/sub c//sub 2/ enhancement due to the addition of Ti to the matrix of bronze-processed Nb/sub 3/Sn superconductors  

SciTech Connect

The measurements of rho/sub n/ (the normal state resistivity), T/sub c/, H/sub c//sub 2/, and (dH/sub c//sub 2//dt)/sub T//sub //sub = //sub T//sub >//sub c//sub =/ have been made for bronze-processed Nb/sub 3/Sn wires with addition of Ti to the Cu-Sn matrix in order to study the mechanism of H/sub c//sub 2/ enhancement due to the addition of Ti. The coefficient of electron specific heat, ..gamma.., has been derived by two independent methods: one using the Ginzburg--Landau--Abrikosov--Gor'kov (GLAG) theory and the measured values of rho/sub n/, T/sub c/, and (dH/sub c//sub 2//dT)/sub T//sub //sub = //sub T//sub >//sub c//sub =/, and the other using the Kramer pinning theory and the gradient of J/sup 1/2//sub c/H/sup 1/4/ -H curves. The ratios of ..gamma../..gamma../sub 0/ which have been derived by these two methods are in good agreement with each other. (..gamma../sub 0/ is the value of ..gamma.. for the specimen to which Ti is not added.) The upper critical fields given by the GLAG theory, H/sup *//sub c//sub 2/ and H/sub c//sub 2/, at 0 K increase rapidly with Ti concentration in the Nb/sub 3/Sn layer up to 2 at. % and decrease slightly above 2 at. %. The rapid increase in rho/sub n/..gamma..T/sub c/ caused by the addition of Ti is sufficient to explain the enhancement in H/sub c//sub 2/, and among rho/sub n/, ..gamma.. and T/sub c/, only rho/sub n/ shows a significant increase with increasing amounts of additional Ti, indicating that the main reason for the H/sub c//sub 2/ enhancement is the increase in rho/sub n/.

Sekine, H.; Itoh, K.; Tachikawa, K.

1988-03-15T23:59:59.000Z

396

SSRL BEAM PORT SCHEDULE  

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

1-4 1-4 Nov. 05, 2007 Nov. 06, 2007 Nov. 07, 2007 Nov. 08, 2007 Nov. 09, 2007 Nov. 10, 2007 Nov. 11, 2007 Unscheduled Unscheduled 8051 M.TONEY 8051 M.TONEY 8051 M.TONEY 8051 M.TONEY 8051 M.TONEY Unscheduled CHANGE/8051 M.TONE 8051 M.TONEY 8051 M.TONEY 8051 M.TONEY 8051 M.TONEY 8051 M.TONEY Unscheduled 8051 M.TONEY 8051 M.TONEY 8051 M.TONEY 8051 M.TONEY 8051 M.TONEY 8051 M.TONEY BEAM LINE 2-1 Nov. 05, 2007 Nov. 06, 2007 Nov. 07, 2007 Nov. 08, 2007 Nov. 09, 2007 Nov. 10, 2007 Nov. 11, 2007 8859 B.JOHNSON 8859 B.JOHNSON 8859 B.JOHNSON 8859 B.JOHNSON 3157* M.MONTERO-CA 3087 L.FUENTES-COB 3087 L.FUENTES-COB

397

Implementation of an airline recovery model in an event-based simulation  

E-Print Network (OSTI)

Airlines maximize the use of their resources by minimizing the time between consecutive flight legs in their aircraft and crew schedules. As a result, bad weather or unscheduled aircraft maintenance events can have a ...

Rabbani, Fábio Faizi Rahnemay, 1978-

2004-01-01T23:59:59.000Z

398

SSRL BEAM PORT SCHEDULE  

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

Oct. 28, 2009 Oct. 29, 2009 Oct. 30, 2009 Oct. 31, 2009 Nov. 01, 2009 Unscheduled 3269 S.SUN 3147 G.LUCOVSKY 3147 G.LUCOVSKY 3147 G.LUCOVSKY DOWN DOWN VUV CHECKOUT CHANGE3147...

399

Natural Gas Weekly Update  

Gasoline and Diesel Fuel Update (EIA)

April 30. Sea Robin Pipeline Company announced on March 31 that it began unscheduled pipeline maintenance and repair work in the Gulf of Mexico. As a result, the offshore...

400

Subsea Kick Detection on Floating Vessels: A Parametric Study  

E-Print Network (OSTI)

Well control in drilling operations is priority to personnel safety. Detection of kicks, or the unscheduled entry of formation fluids into the wellbore, is vital to well control. It has been determined that return flow rate is the parameter most...

Collette, Eric Peter

2013-07-22T23:59:59.000Z

Note: This page contains sample records for the topic "unscheduled downtime due" 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

Fault Detection and Diagnosis in TurbineEngines using Fuzzy Logic  

E-Print Network (OSTI)

with in-flight shutdowns, delays and cancellations, unscheduled engine removals, and take-off aborts engine monitoring and diagnosis. First, many engine problems are not distinguishable or even visible

Gayme, Dennice

402

SSRL BEAM PORT SCHEDULE  

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

1-5 1-5 Nov. 05, 2007 Nov. 06, 2007 Nov. 07, 2007 Nov. 08, 2007 Nov. 09, 2007 Nov. 10, 2007 Nov. 11, 2007 Unscheduled FACI FACI FACI FACI FACI FACI FACI FACI FACI FACI FACI FACI FACI FACI FACI FACI FACI FACI FACI FACI BEAM LINE 7-1 Nov. 05, 2007 Nov. 06, 2007 Nov. 07, 2007 Nov. 08, 2007 Nov. 09, 2007 Nov. 10, 2007 Nov. 11, 2007 Unscheduled FACI FACI FACI FACI FACI FACI

403

,"Energy","Water","Renewable","Petroleum","Alt. Fuel",,"On-Line Data Collection System",,"Report Period","Due In",,,"Primary","Secondary","Secondary"  

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

Energy","Water","Renewable","Petroleum","Alt. Fuel",,"On-Line Data Collection System",,"Report Period","Due In",,,"Primary","Secondary","Secondary" Energy","Water","Renewable","Petroleum","Alt. Fuel",,"On-Line Data Collection System",,"Report Period","Due In",,,"Primary","Secondary","Secondary" 2003,,,,,,,"EMS4","Environmental Management System","Fiscal Year (Oct 1 - Sept 30)","November 15",,"Fiscal Year",2009 2004,,,,,,,"FAST","Federal Automotive Statistical Tool","Fiscal Year (Oct 1 - Sept 30)","October 31",,"Department","Department of Energy" 2005,-2.775557562e-17,,,0,0,,"FIMS","Facilities Information Management System","Fiscal Year (Oct 1 - Sept 30)","November 15",,"Program","Office of Legacy Management"

404

Due West, South Carolina: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

3334469°, -82.387902° 3334469°, -82.387902° 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":34.3334469,"lon":-82.387902,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

405

Investigation of induced thermal behavior due to simple tension  

E-Print Network (OSTI)

thermodynamics. Tni. s was sub', ect 2 to the restriction that the materi" 1 conform sufficiently to the ideally elastic hypothesis and that the deformrationr b(. adiabatic. 2N. A . Blot, J. Applied Phys. , 2 I, 2(1{1-2S. (1956) Col&i c '. . '. : ll y 1 & li...&'i ~ li&} ': &1 ciⅈ al)y to ' iisrli iibe }&c . . :i] cixtrrm!i &l i;hie! I oer?rs. Th ?: ppl'& a&'h of Rpc"I ion 2 f, . to cxpl r&it f l)e ?r?, )ail )z?'] e&]ur&t i& ns oi conLiliuur&i mec]ial)ics, 'L'hc re] at. ionohili c&f el i! ssic I]. th!. rn...

Tenison, Larry Turner

2012-06-07T23:59:59.000Z

406

CALL FOR PAPERS & PRESENTATIONS Abstracts due by September 15, 2014  

E-Print Network (OSTI)

-of-way. Best practices and advances in technology for the inspection and maintenance of the railroad, security assurance, emergency preparedness and response Track 7: Energy Efficiency and Sustainability

Su, Xiao

407

Absence of Debye Sheaths Due to Secondary Electron Emission  

SciTech Connect

A bounded plasma where the hot electrons impacting the walls produce more than one secondary on average is studied via particle-in-cell simulation. It is found that no classical Debye sheath or space-charge limited sheath exists. Ions are not drawn to the walls and electrons are not repelled. Hence the unconfined plasma electrons travel unobstructed to the walls, causing extreme particle and energy fluxes. Each wall has a positive charge, forming a small potential barrier or "inverse sheath" that pulls some secondaries back to the wall to maintain the zero current condition.

M.D. Campanell, A. Khrabrov and I. D. Kaganovich

2012-05-11T23:59:59.000Z

408

There goes the neighborhood: performance degradation due to nearby jobs  

Science Journals Connector (OSTI)

Predictable performance is important for understanding and alleviating application performance issues; quantifying the effects of source code, compiler, or system software changes; estimating the time required for batch jobs; and determining the allocation ... Keywords: communication performance, interference, resource management, system noise, torus networks

Abhinav Bhatele; Kathryn Mohror; Steven H. Langer; Katherine E. Isaacs

2013-11-01T23:59:59.000Z

409

Study finds radioactivity around Los Alamos largely due to natural...  

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

natural sources The study was subsequently peer reviewed externally by scientists at Colorado State University and internally within the Lab. December 10, 2008 Los Alamos National...

410

Permeability Reduction Due to Precipitation of Quartz under Nonisothermal Conditions  

SciTech Connect

Many problems concerning the origin and exploitation of geothermal reservoirs demonstrate the need for models of reactive-solute transport. Of particular interest to us is the coupling between dissolution/precipitation reactions and transient-flow behavior. In an effort to account for observed flow-rate reductions during experiments on samples of granite held in a temperature gradient (summarized at this meeting in 1981 by Moore and others), we examine the effect of quartz precipitation on fluid flow. Our results confirm earlier inerences that reactions responsible for porosity reduction were affected by kinetic factors. Although our results show substantial flow-rate reductions, we are unable to reproduce measured silica concentrations of the outlet fluid by considering the behavior of silica phases without regard for that of the feldspars and micas.

Keith, Laura A.; Delaney, Paul T.; Moore, Diane E.

1983-12-15T23:59:59.000Z

411

QAM multi-path characterization due to ocean scattering  

SciTech Connect

A series of RF channel flight characterization tests are to be run, in early March, to benchmark high speed, 16QAM multi-path performance over the ocean surface. The modulation format being tested is a 16 differential phase, absolute amplitude, two level polar quadrature amplitude modulation. The bit rate is 100 Megabits per second. This transmitted signal will be generated in a burst mode, being on for 40 microseconds once every 40 milliseconds. An aircraft will radiate the RF test signal at 5 different altitudes. The aircraft will make two inward flights at each altitude with vertical and horizontal polarization respectively. Receivers are to be placed in two different locations using circular antenna polarization. One receiver will be placed at an altitude of 230 feet above the ocean surface, and the other on a boat with the antenna placed just up off of the ocean surface. Data is to be collected over multiple wavelength changes in the difference between the line of sight and the reflected multi-path ray. The real time signal strength variation is to be recorded as well. Analysis of the resulting data will show flat fading and frequency selective fading effects. The test is run over two different days to provide for some variation in sea state conditions. This resulting information will help quantify the effectiveness of this novel modulation scheme for missile telemetry end event data applications.

Petersen, T. L. (Thomas L.); Bracht, R. R.; Pasquale, R. V. (Regina V.); Dimsdle, J. (Jeffery); Swanson, R. (Richard)

2002-01-01T23:59:59.000Z

412

Fast Magnetic Reconnection Due to Anisotropic Electron Pressure  

E-Print Network (OSTI)

A new regime of fast magnetic reconnection with an out-of-plane (guide) magnetic field is reported in which the key role is played by an electron pressure anisotropy described by the Chew-Goldberger-Low gyrotropic equations of state in the generalized Ohm's law, which even dominates the Hall term. A description of the physical cause of this behavior is provided and two-dimensional fluid simulations are used to confirm the results. The electron pressure anisotropy causes the out-of-plane magnetic field to develop a quadrupole structure of opposite polarity to the Hall magnetic field and gives rise to dispersive waves. In addition to being important for understanding what causes reconnection to be fast, this mechanism should dominate in plasmas with low plasma beta and a high in-plane plasma beta with electron temperature comparable to or larger than ion temperature, so it could be relevant in the solar wind and some tokamaks.

Cassak, P A; Fermo, R L; Beidler, M T; Shay, M A; Swisdak, M; Drake, J F; Karimabadi, H

2015-01-01T23:59:59.000Z

413

Investigation of Fatalities Due to Acute Gasoline Poisoning  

Science Journals Connector (OSTI)

......may be absent in some northern winter markets (4). In accor- dance with European...The GC-FID patterns of gasoline, diesel-fuel, kerosene, 645 turpentine, etc...and 6, 1-methylnaphtalene (A). Diesel fuel (425 mg/L) peak identification......

María A. Martínez; Salomé Ballesteros

2005-10-01T23:59:59.000Z

414

Bending waves due to a moving harmonic force.  

Science Journals Connector (OSTI)

In many structurally induced and flow?induced vibration problems the harmonic forcing function is not stationary but moves with a velocity V 0. The effect of the forcing function velocity V 0 upon the free vibrational wave?number characteristics of a membrane and a plate is analyzed. The Mach numberM is defined to be the ratio of the velocity V 0 to the wave speed of the bending waves. For the membrane the effect of the Mach number is to increase the wave number (shorter wavelength) ahead of the forcing function and to decrease the wave number (longer wavelength) behind it. At supersonic speeds no disturbances travel ahead of the forcing function and both wave numbers lead to trailing waves. These results are equivalent to the classical Doppler?shifted results. The results of the plate are more complex. The right and left traveling waves retain their basic properties with the magnitude of the wave number changing monotomically as a function of the Mach numberM. The near?field decaying disturbances also retain their basic properties but immediately obtain components that induce the decaying disturbances to become left traveling waves with decaying components. At Mach numbers greater than 2 these disturbances become pure waves trailing without any decaying factor. The importance of each of these components as a function of the Mach number is discussed.

Mauro Pierucci

1992-01-01T23:59:59.000Z

415

Nano-Scale Elastic Properties Due to Montmorillonite Water Adsorption  

E-Print Network (OSTI)

Smectites are an important group of clay minerals that experience swelling upon water adsorption. This paper uses molecular dynamics with the CLAYFF force field to simulate isothermal isobaric water adsorption of interlayer ...

Ebrahimi, Davoud

416

Global energy consumption due to friction in passenger cars  

Science Journals Connector (OSTI)

This study presents calculations on the global fuel energy consumption used to overcome friction in passenger cars in terms of friction in the engine, transmission, tires, and brakes. Friction in tribocontacts was estimated according to prevailing contact mechanisms such as elastohydrodynamic, hydrodynamic, mixed, and boundary lubrication. Coefficients of friction in the tribocontacts were estimated based on available information in the literature on the average passenger car in use today, a car with today’s advanced commercial tribological technology, a car with today’s best advanced technology based upon recent research and development, and a car with the best technology forecasted in the next 10 years. The following conclusions were reached: • In passenger cars, one-third of the fuel energy is used to overcome friction in the engine, transmission, tires, and brakes. The direct frictional losses, with braking friction excluded, are 28% of the fuel energy. In total, 21.5% of the fuel energy is used to move the car. • Worldwide, 208,000 million liters of fuel (gasoline and diesel) was used in 2009 to overcome friction in passenger cars. This equals 360 million tonne oil equivalent per year (Mtoe/a) or 7.3 million TJ/a. Reductions in frictional losses will lead to a threefold improvement in fuel economy as it will reduce both the exhaust and cooling losses also at the same ratio. • Globally, one passenger car uses on average of 340 l of fuel per year to overcome friction, which would cost 510 euros according to the average European gas price in 2011 and corresponds to an average driving distance of 13,000 km/a. • By taking advantage of new technology for friction reduction in passenger cars, friction losses could be reduced by 18% in the short term (5–10 years) and by 61% in the long term (15–25 years). This would equal worldwide economic savings of 174,000 million euros and 576,000 million euros, respectively; fuel savings of 117,000 million and 385,000 million liters, respectively; and CO2 emission reduction of 290 million and 960 million tonnes, respectively. • The friction-related energy losses in an electric car are estimated to be only about half those of an internal combustion passenger car. Potential actions to reduce friction in passenger cars include the use of advanced coatings and surface texturing technology on engine and transmission components, new low-viscosity and low-shear lubricants and additives, and tire designs that reduce rolling friction.

Kenneth Holmberg; Peter Andersson; Ali Erdemir

2012-01-01T23:59:59.000Z

417

Accurate light-time correction due to a gravitating mass  

E-Print Network (OSTI)

This work arose as an aftermath of Cassini's 2002 experiment \\cite{bblipt03}, in which the PPN parameter $\\gamma$ was measured with an accuracy $\\sigma_\\gamma = 2.3\\times 10^{-5}$ and found consistent with the prediction $\\gamma =1$ of general relativity. The Orbit Determination Program (ODP) of NASA's Jet Propulsion Laboratory, which was used in the data analysis, is based on an expression for the gravitational delay which differs from the standard formula; this difference is of second order in powers of $m$ -- the sun's gravitational radius -- but in Cassini's case it was much larger than the expected order of magnitude $m^2/b$, where $b$ is the ray's closest approach distance. Since the ODP does not account for any other second-order terms, it is necessary, also in view of future more accurate experiments, to systematically evaluate higher order corrections and to determine which terms are significant. Light propagation in a static spacetime is equivalent to a problem in ordinary geometrical optics; Fermat's action functional at its minimum is just the light-time between the two end points A and B. A new and powerful formulation is thus obtained. Asymptotic power series are necessary to provide a safe and automatic way of selecting which terms to keep at each order. Higher order approximations to the delay and the deflection are obtained. We also show that in a close superior conjunction, when $b$ is much smaller than the distances of A and B from the Sun, of order $R$, say, the second-order correction has an \\emph{enhanced} part of order $m^2R/b^2$, which corresponds just to the second-order terms introduced in the ODP. Gravitational deflection of the image of a far away source, observed from a finite distance from the mass, is obtained to $O(m^2)$.

Neil Ashby; Bruno Bertotti

2009-12-14T23:59:59.000Z

418

AREAS OF GROUND SUBSIDENCE DUE TO GEO-FLUID WITHDRAWAL  

E-Print Network (OSTI)

p. Idaho Bureau of Mines Shanklin, J , 1977. I r r i g a t it r i b u t a r i e s (Shanklin, Stearns e t a l . , (1938,

Grimsrud, G. Paul

2011-01-01T23:59:59.000Z

419

Problem Set 3: Chemistry 223 DUE: Monday, November 11, 2013  

E-Print Network (OSTI)

temperature of 37o C? You must first calculate Hvap at 37o . iii) The heat of combustion of cane sugar is 3 of error? d) Which compound would yield more heat upon complete combustion in oxygen? Fall Term, 2014 #12;

Ronis, David M.

420

Dynamical fracture instabilities due to local hyperelasticity at crack tips  

Science Journals Connector (OSTI)

... a crack propagating through a brittle material increases, a dynamical instability leads to an increased roughening of the fracture surface. Cracks moving at low speeds create atomically flat mirror-like ...

Markus J. Buehler; Huajian Gao

2006-01-19T23:59:59.000Z

Note: This page contains sample records for the topic "unscheduled downtime due" 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

Abrupt Glacial Climate Changes due to Stochastic Resonance  

Science Journals Connector (OSTI)

Using an ocean-atmosphere climate model we demonstrate that stochastic resonance could be an important mechanism for millennial-scale climate variability during glacial times. We propose that the glacial ocean circulation, unlike today’s, was an excitable system with a stable and a weakly unstable mode of operation, and that a combination of weak periodic forcing and plausible-amplitude stochastic fluctuations of the freshwater flux into the northern North Atlantic can produce glacial warm events similar in time evolution, amplitude, spatial pattern, and interspike intervals to those found in the observed climate records.

Andrey Ganopolski and Stefan Rahmstorf

2002-01-04T23:59:59.000Z

422

Homework I: Due 09/22/05 Prof. Bukiet  

E-Print Network (OSTI)

after 4 hours). Two hours after the bleeding stops, the infusion of blood and antibiotics is stopped such that half of a given amount infused into the bloodstream at a given instant remains 3 hours later.) 2. Take

Bukiet, Bruce

423

Theory of Computation Due: 10/21/2014  

E-Print Network (OSTI)

A is recursive. Then there exists a TM MA that decides A such that · MA(M; x) = "Yes", if (M; x) A, · MA(M; x) = "No", if (M; x) / A. Consider the program D(M) that calls MA: 1: if MA(M; M) = "Yes" then 2: D(M) = "No"; 3: else 4: D(M) = "Yes"; 5: end if Now, consider D(D): · D(D) = "No", if MA(D; D) = "Yes". · D

Lyuu, Yuh-Dauh

424

Resuspension of radionuclides into the atmosphere due to forest fires  

Science Journals Connector (OSTI)

Two major wild fire episodes occurred in north-western Russia in April/May and August 2008. The burning biomass and heating of the surface soil released several hazardous components into the atmosphere. During...

Jussi Paatero; K. Vesterbacka; U. Makkonen…

2009-11-01T23:59:59.000Z

425

Effect of topography on ground movement due to longwall mining  

SciTech Connect

This paper presents an analysis of the effects of topography on static and dynamic ground movements and severity of damage inflicted on surface structures. A typical site containing varying topographical features (i.e., mountains, hillsides, valleys, and flat bottom land) representing the northern Appalachian region was chosen for the study. Typical subsidence monitoring techniques were employed. Frequent measurements were made as the face advanced.

Khair, A.W.; Quinn, M.K.; Chaffins, R.D.

1988-08-01T23:59:59.000Z

426

Air Emissions Due To Wind And Solar Power  

Science Journals Connector (OSTI)

When these sources provide a significant fraction of electricity, other generators or rapid demand response must compensate when their output drops (8, 9). ...

Warren Katzenstein; Jay Apt

2008-12-19T23:59:59.000Z

427

Resistance Fluctuations Due to Hydrogen Diffusion in Niobium Thin Films  

Science Journals Connector (OSTI)

Fluctuations of the number of protons (H+) that scatter conduction electrons dominate lowfrequency resistance fluctuations in Nb films. The excess-noise spectra SV(f, T) obey a scaling law: fSV(f, T)??V2(T)?=g(fD(T)); for our geometry at 260

John H. Scofield and Watt W. Webb

1985-01-28T23:59:59.000Z

428

Hardening of a bismuth crystal due to electroplastic deformation  

Science Journals Connector (OSTI)

The surface texture of a bismuth crystal after deformation of the surface by a diamond pyramid and simultaneous passage of a pulse of high-density electric current is studied. The fact of hardening is establis...

1 V. S. Savenko

2007-03-01T23:59:59.000Z

429

ON THE WAVES DUE TO THE ROLLING OF A SHIP  

Science Journals Connector (OSTI)

......THE ROLLING OF A SHIP 247 (3) The effects of viscosity and...assumed that the effect of the beam can...that is, the ship is here replaced...experiments were made on ship-forms lacking...moreover, the effect of the finite cross-section......

F. URSELL

1948-01-01T23:59:59.000Z

430

Formation Damage due to CO2 Sequestration in Saline Aquifers  

E-Print Network (OSTI)

Carbon dioxide (CO2) sequestration is defined as the removal of gas that would be emitted into the atmosphere and its subsequent storage in a safe, sound place. CO2 sequestration in underground formations is currently being considered to reduce...

Mohamed, Ibrahim Mohamed 1984-

2012-10-25T23:59:59.000Z

431

Risk Due to Radiological Terror Attacks With Natural Radionuclides  

Science Journals Connector (OSTI)

The naturally occurring radionuclides radium (Ra?226) and polonium (Po?210) have the potential to be used for criminal acts. Analysis of international incident data contained in the Database on Nuclear Smuggling Theft and Orphan Radiation Sources (CSTO) operated at the University of Salzburg shows that several acts of murder and terrorism with natural radionuclides have already been carried out in Europe and Russia. Five different modes of attack (T) are possible: (1) Covert irradiation of an individual in order to deliver a high individual dose; (2) Covert irradiation of a group of persons delivering a large collective dose; (3) Contamination of food or drink; (4) Generation of radioactive aerosols or solutions; (5) Combination of Ra?226 with conventional explosives (Dirty Bomb).

Steinhäusler Friedrich; Rydell Stan; Zaitseva Lyudmila

2008-01-01T23:59:59.000Z

432

AREAS OF GROUND SUBSIDENCE DUE TO GEO-FLUID WITHDRAWAL  

E-Print Network (OSTI)

Environmental Effects of Geothermal Power Production, PhaseEnvironmental Effects of Geothermal Power Production - Phaseof prospecting them for geothermal power: U N Conf. on new

Grimsrud, G. Paul

2011-01-01T23:59:59.000Z

433

MATH 498/812: Assignment 3 Due: 12 November 2012  

E-Print Network (OSTI)

+ p is a generator of (Z/p2 Z) . 3. Let p be an odd prime. Show by induction on a that (Z/pa Z order pa-1 (p - 1). 2. Let p be an odd prime and g a generator of the group (Z/pZ) . Show that g or g) is cyclic. [You may assume the result for a = 1, which was proved in class.] 4. Prove by induction

Murty, Ram

434

Physical Oceanography, ESE 131 Problem Set 1 Due: January 18  

E-Print Network (OSTI)

temperature, but with a linear gradient in salinity. Assuming that fresh meltwater is light enough to rise. From the in situ temperature and salinity data, plot sections of , 0, 2 and 4 as a function of pressure- perature, salinity, in situ density and potential density. Indicate and label important features (e

Thompson, Andrew

435

Estimating the expected latency to failure due to manufacturing defects  

E-Print Network (OSTI)

Manufacturers of digital circuits test their products to find defective parts so they are not sold to customers. Despite extensive testing, some of their products that are defective pass the testing process. To combat this problem, manufacturers...

Dorsey, David Michael

2004-09-30T23:59:59.000Z

436

Math 310 Homework Assignment 6 due date: Oct. 25, 2013  

E-Print Network (OSTI)

G be the element g = p 0 0 1 . 1 #12;(a) Show that gHg-1 H, but gHg-1 = H. The fact you proved in (a) is not a contradiction of the argument in class that the property (3) gHg-1 H for all g G is equivalent to the property (2) gHg-1 = H for all g G. (b) Why isn't this a contradiction? That is, what step

Roth, Mike

437

Geography 155, Latin American Geography Editorial Assignment Due March 2  

E-Print Network (OSTI)

, desertification, erosion, flooding, air, water, and soil pollution, agricultural intensification, use of ethanol to do with the research problem? Examples: peasant slash and burn agriculture, cattle ranching, mining

Lopez-Carr, David

438

Is electrospray emission really due to columbic forces?  

SciTech Connect

Electrospray ionization (ESI) is a widely adopted soft ionization method for mass spectroscopy (MS). In spite of the undeniable success of the technique, its mechanisms are difficult to be analytically modelled because the process is characterized by non-equilibrium conditions. The common belief is that the formation of gas-phase ions takes place at the apex of the Taylor cone via electrophoretic charging. The charge balance implies that a conversion of electrons to ions should occur at the metal-liquid interface of the injector needle. We have detected that the above description is based on unproved assumptions which are not consistent with the correct evaluation of the problem. The comparison between experiments performed under the usual geometry and observations obtained under symmetric field configurations suggests that the emitted droplets cannot be significantly charged or, at least, that any possible ionization mechanism is so poorly efficient to ensure that columbic forces cannot play a major role in jet formation, even in cases where the liquid consists of a solution of ionic species. Further work is required to clearly understand how ionization occurs in ESI-MS.

Aliotta, Francesco, E-mail: aliotta@ipcf.cnr.it; Ponterio, Rosina C.; Salvato, Gabriele; Vasi, Cirino [CNR-Istituto per i Processi Chimico-Fisici, Viale F. Stagno d’Alcontres 37, I-98158 Messina (Italy); Calandra, Pietro [CNR-Istituto per lo Studio dei Materiali Nanostrutturati, via dei Taurini 19, I-00185 Roma (Italy); Pochylski, Mikolaj [Adam Mickiewicz University, Faculty of Physics, Umultowska 85, PL-62614 Poznan (Poland)

2014-09-15T23:59:59.000Z

439

Global tropospheric ozone modeling: Quantifying errors due to grid resolution  

E-Print Network (OSTI)

model-derived monthly climatologies [Tegen et al. , 1997],extent that the MODIS climatology does. [ 11 ] The standarduse the optional aerosol climatology. These simulations are

Wild, Oliver; Prather, Michael J

2006-01-01T23:59:59.000Z

440

Solar electric power plant due to start up  

Science Journals Connector (OSTI)

In early April of this year, Solar One, a central receiver pilot plant designed to show that solar energy can be harnessed by utilities to produce electricity on a commercial scale, will begin producing power. ... With a rated maximum power output to the utility grid of 10.8 MW, Solar One is the world's largest solarpowered electrical generating facility. ...

RUDY M. BAUM

1982-03-15T23:59:59.000Z

Note: This page contains sample records for the topic "unscheduled downtime due" 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

Flying Height Drop Due to Air Entrapment in Lubricant  

Science Journals Connector (OSTI)

Recently, it is found experimentally that the flying height of an air bearing slider is influenced by the lubricant on the disk. It is explained as the air molecules ... in air bearing force, and hence, the flying

Wei Hua; Kang Kee Ng; Shengkai Yu; Bo Liu; Vivian Ng

2013-10-01T23:59:59.000Z

442

A study of temperature distributions due to conduction reservoir heating  

E-Print Network (OSTI)

of thermal conductivity with temperature. He showed this effect could be very important in considering a material such as oil shale, where the conductivity of the raw shale may be five times as great as that of the spent shale. Neglecting this variation... conduction model to investigate the in place heating of oil shale by hot gases forced through a fracture. The heat injection rate he considered is much less than would normally be employed for steam injection into permeable reservoirs and is only about...

Connaughton, Charles Richard

2012-06-07T23:59:59.000Z

443

332: 416 ---Project #4 Due Monday, April 26, 2004  

E-Print Network (OSTI)

to a Robot Arm and a Single­Link Robotic Manipulator with a Flexible Joint Part I. Consider the motor driven robot arm described by â?? ` = ! â?? ! = 0ff! 0\\Omega 2 sin (`) + fiu with the numerical data given by ff = 5; fi = 1;\\Omega 2 = 64 It is desired to control the robot arm to hold any reference (nominal

Gajic, Zoran

444

Math 110 Homework Assignment 9 due date: Nov. 12, 2012  

E-Print Network (OSTI)

question, and that's becuase it's a very good question. It's also a challenging question: it shouldn with a problem of this kind: Something new that you haven't seen before, but something within your powers'd like to know what the values of bn are for n = 2012, 2013, 2014, 2015, 2016, and 2017. So that's your

Roth, Mike

445

CHROMOSOMAL ABERRATIONS IN DATURA DUE TO VARIOUS KINDS OF IRRADIATION  

Science Journals Connector (OSTI)

...usually checked by at least one, and sometimes by two, workers in addition to the finder. As part of the policy of the...unknown. The authors are indebted to the staffs of the Oak Ridge and Brookhaven Na- tional Laboratories, who treated...

Jean M. Cummings; Lewis Goldstein; A. F. Blakeslee

1955-01-01T23:59:59.000Z

446

COMP 335 Programming Languages Fall 2011 Due Date: October 4  

E-Print Network (OSTI)

program file names should end with .c. · All of your programs should be written in ANSI C. You can use any is as follows: gcc -ansi Ccw.c -o Ccw where ­ gcc = gnu c compiler ­ -ansi = ANSI flag which denotes standard C

Gousie, Michael B.

447

Viral Pollution of Surface Waters Due to Chlorinated Primary Effluents  

Science Journals Connector (OSTI)

...gerous wastes into the water environment is likely...logical approach to better water conservation as well as minimizing...combinations ofantiserum pools. Application to typing...Health factors and reused waters. J. Am. Water Works...

Syed A. Sattar; J. C. N. Westwood

1978-09-01T23:59:59.000Z

448

Statistical Power-Law Spectra due to Reservoir Fluctuations  

E-Print Network (OSTI)

LHC ALICE data are interpreted in terms of statistical power-law tailed pT spectra. As explanation we derive such statistical distributions for particular particle number fluctuation patterns in a finite heat bath exactly, and for general thermodynamical systems in the subleading canonical expansion approximately. Our general result, $q = 1 - 1/C + \\Delta T^2 / T^2$, demonstrates how the heat capacity and the temperature fluctuation effects compete, and cancel only in the standard Gaussian approximation.

T. S. Biró; G. G. Barnaföldi; P. Ván; K. Ürmössy

2014-04-04T23:59:59.000Z

449

Hot-Jupiter Inflation due to Deep Energy Deposition  

E-Print Network (OSTI)

Some extrasolar giant planets in close orbits---"hot Jupiters"---exhibit larger radii than that of a passively cooling planet. The extreme irradiation $L_{\\rm eq}$ these hot Jupiters receive from their close in stars creates a thick isothermal layer in their envelopes, which slows down their convective cooling, allowing them to retain their inflated size for longer. This is yet insufficient to explain the observed sizes of the most inflated planets. Some models invoke an additional power source, deposited deep in the planet's envelope. Here we present an analytical model for the cooling of such irradiated, and internally heated gas giants. We show that a power source $L_{\\rm dep}$, deposited at an optical depth $\\tau_{\\rm dep}$, creates an exterior convective region, between optical depths $L_{\\rm eq}/L_{\\rm dep}$ and $\\tau_{\\rm dep}$, beyond which a thicker isothermal layer exists, which in extreme cases may extend to the center of the planet. This convective layer, which occurs only for $L_{\\rm dep}\\tau_{\\r...

Ginzburg, Sivan

2015-01-01T23:59:59.000Z

450

Directives Due for Review Before 9/30/2015  

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

20,"DOE O 414.1D","Quality Assurance","HS","applicationvnd.ms-excel" 21,"DOE O 422.1","Conduct of Operations","HS","applicationvnd.ms-excel" 22,"DOE O 425.1D","Verification of...

451

Applications for Fraunhofer CSE Research Program due August 22  

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

The Office of Energy Efficiency and Renewable Energy (EERE) is sponsoring a 1-year postdoctoral research position with the Fraunhofer Center for Sustainable Energy Systems (CSE) in Boston, MA.

452

Atomic displacements due to spinspin repulsion in conjugated alternant hydrocarbons  

E-Print Network (OSTI)

in secondary batteries [7]. Graphene nanoflakes, also known as nanoislands or nanodisks, are finite­H bond as well as to the spin density at carbon atoms in both open and closed shell at graphene of graphene has increased the interest in CAHs in physics, chemistry and material sciences from both a the

Benzi, Michele

453

Impacts on groundwater due to land application of sewage sludge  

SciTech Connect

The project was designed to demonstrate the potential benefits of utilizing sewage sludge as a soil conditioner and fertilizer on Sassafras sandy loam soil. Aerobically digested, liquid sewage sludge was applied to the soil at rates of 0, 22.4, and 44.8 Mg of dry solids/ha for three consecutive years between 1978 and 1981. Groundwater, soil, and crop contamination levels were monitored to establish the maximum sewage solids loading rate that could be applied without causing environmental deterioration. The results indicate that application of 22.4 Mg of dry solids/ha of sludge is the upper limit to ensure protection of the groundwater quality on the site studied. Application rates at or slightly below 22.4 Mg of dry solids/ha are sufficient for providing plant nutrients for the dent corn and rye cropping system utilized in the study.

Higgins, A.J.

1984-06-01T23:59:59.000Z

454

Extreme events due to human-induced climate change  

Science Journals Connector (OSTI)

...leading to further global warming. Although these...to a net radiative warming of the surface and...burning fossil fuels-coal, gas and oil. Future...to an equilibrium warming of about 1C. However...temporal pattern of global mean warming is similar...

2006-01-01T23:59:59.000Z

455

Black hole lightning due to particle acceleration at subhorizon scales  

Science Journals Connector (OSTI)

...Wilms 1Institut de Fisica d’Altes Energies, Campus UAB, E-08193 Bellaterra...Switzerland.1Institut de Fisica d’Altes Energies, Campus UAB, E-08193 Bellaterra, Spain...Spain.1Institut de Fisica d’Altes Energies, Campus UAB, E-08193 Bellaterra, Spain...

J. Aleksi?; S. Ansoldi; L. A. Antonelli; P. Antoranz; A. Babic; P. Bangale; J. A. Barrio; J. Becerra González; W. Bednarek; E. Bernardini; B. Biasuzzi; A. Biland; O. Blanch; S. Bonnefoy; G. Bonnoli; F. Borracci; T. Bretz; E. Carmona; A. Carosi; P. Colin; E. Colombo; J. L. Contreras; J. Cortina; S. Covino; P. Da Vela; F. Dazzi; A. De Angelis; G. De Caneva; B. De Lotto; E. de Oña Wilhelmi; C. Delgado Mendez; D. Dominis Prester; D. Dorner; M. Doro; S. Einecke; D. Eisenacher; D. Elsaesser; M. V. Fonseca; L. Font; K. Frantzen; C. Fruck; D. Galindo; R. J. García López; M. Garczarczyk; D. Garrido Terrats; M. Gaug; N. Godinovi?; A. González Muñoz; S. R. Gozzini; D. Hadasch; Y. Hanabata; M. Hayashida; J. Herrera; D. Hildebrand; J. Hose; D. Hrupec; W. Idec; V. Kadenius; H. Kellermann; K. Kodani; Y. Konno; J. Krause; H. Kubo; J. Kushida; A. La Barbera; D. Lelas; N. Lewandowska; E. Lindfors; S. Lombardi; F. Longo; M. López; R. López-Coto; A. López-Oramas; E. Lorenz; I. Lozano; M. Makariev; K. Mallot; G. Maneva; N. Mankuzhiyil; K. Mannheim; L. Maraschi; B. Marcote; M. Mariotti; M. Martínez; D. Mazin; U. Menzel; J. M. Miranda; R. Mirzoyan; A. Moralejo; P. Munar-Adrover; D. Nakajima; A. Niedzwiecki; K. Nilsson; K. Nishijima; K. Noda; R. Orito; A. Overkemping; S. Paiano; M. Palatiello; D. Paneque; R. Paoletti; J. M. Paredes; X. Paredes-Fortuny; M. Persic; J. Poutanen; P. G. Prada Moroni; E. Prandini; I. Puljak; R. Reinthal; W. Rhode; M. Ribó; J. Rico; J. Rodriguez Garcia; S. Rügamer; T. Saito; K. Saito; K. Satalecka; V. Scalzotto; V. Scapin; C. Schultz; T. Schweizer; S. N. Shore; A. Sillanpää; J. Sitarek; I. Snidaric; D. Sobczynska; F. Spanier; V. Stamatescu; A. Stamerra; T. Steinbring; J. Storz; M. Strzys; L. Takalo; H. Takami; F. Tavecchio; P. Temnikov; T. Terzi?; D. Tescaro; M. Teshima; J. Thaele; O. Tibolla; D. F. Torres; T. Toyama; A. Treves; M. Uellenbeck; P. Vogler; R. Zanin; M. Kadler; R. Schulz; E. Ros; U. Bach; F. Krauß; J. Wilms

2014-11-28T23:59:59.000Z

456

Irreversible climate change due to carbon dioxide emissions  

Science Journals Connector (OSTI)

...Ocean General Circulation Models (AOGCMs) for projecting 21st century climate, but also to the implementation of Earth System Models of Intermediate Complexity (EMICs) for millennial time scales. These 2 types of models are used in this paper...

Susan Solomon; Gian-Kasper Plattner; Reto Knutti; Pierre Friedlingstein

2009-01-01T23:59:59.000Z

457

Historical warming reduced due to enhanced land carbon uptake  

Science Journals Connector (OSTI)

...JP ( 2012 ) ESM2 global coupled climate-carbon Earth System Models Part II: Carbon system formulation and baseline simulation...emissions and airborne fraction simulated by CMIP5 Earth System models under 4 representative concentration pathways. J...

Elena Shevliakova; Ronald J. Stouffer; Sergey Malyshev; John P. Krasting; George C. Hurtt; Stephen W. Pacala

2013-01-01T23:59:59.000Z

458

Pseudoplastic deformation pits on polished ceramics due to cavitation erosion  

Science Journals Connector (OSTI)

In a previous study, pseudoplastic deformation pits created by cavitation exposure were reported in silicon nitride and zirconia. In this research, further comparison of the size and number of pits between several silicon nitride and zirconia materials is carried out. The pits are larger and much more numerous in silicon nitride than in zirconia although silicon nitride is harder than zirconia. An explanation of this phenomenon is given. Also, in the previous study it was reported that apparently a partially stabilized zirconia with yttria oxide developed a delay in the phase transformation from tetragonal to monoclinic after being exposed to cavitation. In this research, further experiments related with this phase transformation delay are carried out. Also, the phase transformation is verified with X-ray diffraction analysis. It is concluded that the “activation” of the partial stabilized zirconia happens regardless of the oxide used to stabilize it.

G. García-Atance Fatjó; M. Hadfield; K. Tabeshfar

2011-01-01T23:59:59.000Z

459

Thermal neutron flux perturbation due to indium foils in water  

E-Print Network (OSTI)

press) 13. Axford, R. A. , and Day, G. M. , personnel communication. 14. Ritchie, R. H. , Thermal Neutron Flux De ression, Health Physics Division Annual Prog. Rep. July, 1958, ORNL-2806, p. 133. 27 i 5, Walker, J. V. , "The Measurement of Absolute... Fluxes in Water and Graphite, " 'ORNL- 2842, 204 (f959). ...

Stinson, Ronald Calvin

1961-01-01T23:59:59.000Z

460

Quantum damping of position due to energy measurements  

E-Print Network (OSTI)

Quantum theory for measurements of energy is introduced and its consequences for the average position of monitored dynamical systems are analyzed. It turns out that energy measurements lead to a localization of the expectation values of other observables. This is manifested, in the case of position, as a damping of the motion without classical analogue. Quantum damping of position for an atom bouncing on a reflecting surface in presence of a homogeneous gravitational field is dealt in detail and the connection with an experiment already performed in the classical regime is studied. We show that quantum damping is testable provided that the same measurement strength obtained in the experimental verification of the quantum Zeno effect in atomic spectroscopy [W. M. Itano et al., Phys. Rev. A {\\bf 41}, 2295 (1990)] is made available.

Roberto Onofrio; Lorenza Viola

1996-06-24T23:59:59.000Z

Note: This page contains sample records for the topic "unscheduled downtime due" 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

Decoherence in a single trapped ion due to engineered reservoir  

E-Print Network (OSTI)

The decoherence in trapped ion induced by coupling the ion to the engineered reservoir is studied in this paper. The engineered reservoir is simulated by random variations in the trap frequency, and the trapped ion is treated as a two-level system driven by a far off-resonant plane wave laser field. The dependence of the decoherence rate on the amplitude of the superposition state is given.

X. X. Yi; D. L. Zhou; C. P. Sun

2000-04-18T23:59:59.000Z

462

RFPs Due for Hazardous Fuel Wood to Energy Grant  

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

The U.S. Forest Service requests proposals for the 2014 Hazardous Fuel Wood to Energy (W2E) Grant.  The outcome anticipated under this funding mechanism will advance the United States Department of...

463

Estimates of Radiation Dose from Strontium-90 Due to Fallout  

Science Journals Connector (OSTI)

...2412"` d., 74" h. 2" fiberglas insulation. 1 50() watts, 11 5, 208, or 230...gratings, electro-luminescence, thermal radiation backgrounds, infrared polarizers...chart. Write for complete data and specifications. SMALL ANIMAL BALANCE Model 4203B-TC-SA...

MERRIL EISENBUD

1959-09-18T23:59:59.000Z

464

Analytical determination of propeller performance degradation due to ice accretion  

E-Print Network (OSTI)

trajectory code. Unlike the Bragg code, the effects of compressibility, kinetic heating, and water runback are taken into account in this code, thus making it applicable to both rime and glaze ice conditions. Designed to be applied to helicopter config...- ' urations, the code employs a heat balance analysis to calculate the kinetic heating and runback effects. The authors have reported good agreement between predicted and experimentally obtained ice shapes, tem- perature distributions, and icing threshold...

Miller, Thomas Lloyd

1984-01-01T23:59:59.000Z

465

Summer 2012 National Geothermal Academy: Applications Due February...  

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

Academy is proud to present an intensive summer course in all aspects of geothermal energy development and utilization, held at the University of Nevada, Reno campus. The...

466

Seismic attenuation due to wave-induced flow  

E-Print Network (OSTI)

Jan 14, 2004 ... incapable of explaining the measured level of loss (10. ?2. standard complex longtitudinal slowness s of ..... dimensional process normal to the interface. [69] Using ...

2004-01-03T23:59:59.000Z

467

Pounding and impact of base isolated buildings due to earthquakes  

E-Print Network (OSTI)

.3. Base isolation in both adjacent buildings.....................................................72 5. SUMMARY AND CONCLUSION.........................................................................85 5.1. Summary and scope of study... ..............................................................................................................................138 viii LIST OF TABLES TABLE Page 1.1 Survey of earlier research on pounding of buildings...............................................5 3.1 Adjacent building configurations used in this study...

Agarwal, Vivek Kumar

2005-08-29T23:59:59.000Z

468

Stresses in adhesive joints due to moisture sorption  

E-Print Network (OSTI)

) + independent variations bul, bu, bu, bv, bw, bw, 6w, bw, bql, e 2 6q2, 6P1, and 6p2 we obtain the following field equations: -N 1 -q =0 1 (a) N2 + q2 0 (b) -N -q +q =0 2 1 (c) a a ')e - ~22 ? ~21 - M, = ' (d) ? 5 1 h 1 -p =0 1 (e) -M2" = 0 lg a e...J e e = f 5 a c h n c As a further step consider the following non-dimensional quantities 18 and ND ue ? aue ND ye Te ND wl ? awl ND wZ = awZ ND x X c (35) whereby d 1 d 1 ? = ? = ? 0 dx c d ND c dx The non...

Jen, Ming-Hwa Robert

1980-01-01T23:59:59.000Z

469

ASTR 3730: Problem Set 1 (due Tuesday September 6th  

E-Print Network (OSTI)

within the cluster. Assume that the HST has a mirror of diameter 2.4m, and works at a wavelength of = 0 by the Schwarzschild radius: Rs = 2GM c2 . The mass of the black hole is about 4 x 106 MSun. Estimate the diameter, D, of a radio telescope that would be needed to resolve structure on the scale of the Schwarzschild radius

Armitage, Phil

470

AREAS OF GROUND SUBSIDENCE DUE TO GEO-FLUID WITHDRAWAL  

E-Print Network (OSTI)

F i r s t Geopressured Geothermal Energy Conference: Austin,Groh, E.A. , 1966, Geothermal Energy P o t e n t i a l i nV.E. , Jr. , 1972, Geothermal energy i n Washington: &

Grimsrud, G. Paul

2011-01-01T23:59:59.000Z

471

Long run changes in driver behavior due to variable tolls  

E-Print Network (OSTI)

Laurence R. Rilett (Chair of Committee) (Member............................................................................10 II BACKGROUND?????????????????????????12 INTRODUCTION........................................................................................12 PRICE ELASTICITY OF DEMAND..........................................................12...

Konduru, Karun K.

2004-09-30T23:59:59.000Z

472

Effects of restraint on expansion due to delayed ettringite formation  

Science Journals Connector (OSTI)

Delayed ettringite formation (DEF) is a chemical reaction that causes expansion in civil engineering structures. The safety level of such damaged structures has to be reassessed. To do this, the mechanical conditions acting on DEF expansions have to be analysed and, in particular, the variation of strength with expansion and the effect of restraint on the DEF expansion. This paper highlights several points: DEF expansion is isotropic in stress-free conditions, compressive stresses decrease DEF expansion in the direction subjected to restraint and lead to cracks parallel to the restraint, and expansion measured in the stress-free direction of restrained specimens is not modified. Thus restraint causes a decrease of the volumetric expansion and DEF expansion under restraint is anisotropic. Moreover, the paper examines the correlation between DEF expansion and concrete damage, providing data that can be used for the quantification of the effect of stresses on DEF induced expansion.

Hassina Bouzabata; Stéphane Multon; Alain Sellier; Hacène Houari

2012-01-01T23:59:59.000Z

473

Fracture Initiation Due to Hydrides in Zircaloy-2  

Science Journals Connector (OSTI)

In hydride-forming metals, the presence of hydrides can sometimes lead to brittle fracture. Zirconium is a hydride-forming metal that forms the basis of a number of alloys used in CANDUTM nuclear reactors. Under ...

M. P. Puls; B. W. Leitch; W. R. Wallace

1987-01-01T23:59:59.000Z

474

Performance degradation of OFDM systems due to Doppler spreading  

E-Print Network (OSTI)

on Jakes’ model for the Doppler effects, and an exponentialand S. Kaiser, “The effects of Doppler spreads in OFDM (A)In particular, the effect of Doppler spreading destroys the

Wang, T J; Proakis, J G; Masry, E; Zeidler, James R

2006-01-01T23:59:59.000Z

475

All United Way Raffle Winners Identified, Pledge Forms Due Monday...  

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

Division, winners of the iPad minis, and to Todd Coates, IT Division, on winning the Apple iPad. Please remember: All United Way pledge forms should be submitted to Josh Cameron...

476

AREAS OF GROUND SUBSIDENCE DUE TO GEO-FLUID WITHDRAWAL  

E-Print Network (OSTI)

under alluvium. Unconsolidated Quaternary - alluvium and fanm. Typical profile: 0-180 m unconsolidated clay, silt. sand,normal faults. 3000 m. Unconsolidated alluvium underlain by

Grimsrud, G. Paul

2011-01-01T23:59:59.000Z

477

Aeration Due to Breaking Waves. Part I: Bubble Populations  

Science Journals Connector (OSTI)

The population of bubbles produced by breaking waves in (10 m) winds of up to 12 m s?1 is analyzed using calibrated images from a vertical pencil-beam sonar system placed on the seabed near the Dutch coast. The structure in the images is ...

A. Graham; D. K. Woolf; A. J. Hall

2004-05-01T23:59:59.000Z

478

Changes in soy flour protein solubilities due to heating  

E-Print Network (OSTI)

. Therefore, the effects of the various variables on the soy flour dough need Literature citations in this thesis follow the style of the Transactions of the ASAE (American Society of Agricultural Engineers). to be studied independent of the extruder. One... system (AACC, 1973). 27 TABLE 1 ~ EXTRACTION AND FRACTIONATION OF PROTEINS ACCCORDING TO LANDRY AND MOREAUX (SEQUENCE D) FR PROTEINS TEMPERATURE SOLVENT EXTRACTION TIME EXTRACTION 1 Globulins 4oC albumins 4oC 2 Prolamines 24oC 3 Disulfide 24 C...

Ordonez, Gloria Pilar

2012-06-07T23:59:59.000Z

479

AREAS OF GROUND SUBSIDENCE DUE TO GEO-FLUID WITHDRAWAL  

E-Print Network (OSTI)

here, and the Raft River geothermal wells a r e located t oPROPERTIES OF RAFT RIVER GEOTHERMAL WELL CORES (from Stokerin the area of Geothermal wells rs a 9 square mile area with

Grimsrud, G. Paul

2011-01-01T23:59:59.000Z

480

Transverse wakefields due to asymmetric protrusions into a vacuum chamber  

Science Journals Connector (OSTI)

Abstract We analyze the effect of a wakefield caused by an asymmetric protrusion inside the accelerator vacuum chamber. The asymmetry leads to a transverse kick on the beam and an increase of the projected transverse beam emittance. Calculations are done for a model rectangular protrusion in a vacuum chamber of rectangular cross-section. Based on our analysis, numerical estimates are given for the SuperKEKB accelerator in KEK, Japan, and TLEP-W proposal at CERN.

Gennady Stupakov; Demin Zhou

2014-01-01T23:59:59.000Z

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481

Effective Improvement in Generation Efficiency due to Partition Cooperation Management  

Science Journals Connector (OSTI)

The effective reduction of greenhouse-gas emission is expected to be achieved with the micro-grid [21–23]. In particular, the micro-grid using a fuel cell is predicted to ... reduce greenhouse gases to a maximum,...

2009-01-01T23:59:59.000Z

482

Simulation of paraffin damage due to natural cooling in reservoirs  

E-Print Network (OSTI)

the well bore. The precipitated paraffin particles form a suspension with the reservoir fluids. The suspended solid particles tend to be carried towards the wellbore by the liquid stream. Some of these particles deposit in the pore spaces... that the rate of removal of suspended solids is equal to the concentration of suspended solids times a deposition coefficient. The deposition coefficient is obtained by fitting experimental data. This method, introduced by Iwasaki' in 1937 is widely used...

Peddibhotla, Sriram

1993-01-01T23:59:59.000Z

483

Comment on 'Air Emissions Due to Wind and Solar Power'  

SciTech Connect

Katzenstein and Apt investigate the important question of pollution emission reduction benefits from variable generation resources such as wind and solar. Their methodology, which couples an individual variable generator to a dedicated gas plant to produce a flat block of power, is, however, inappropriate. For CO{sub 2}, the authors conclude that variable generators ''achieve {approx}80% of the emission reductions expected if the power fluctuations caused no additional emissions.'' They find even lower NO{sub x} emission reduction benefits with steam injected gas turbines and a 2--4 times net increase in NO{sub x} emissions for systems with dry NO{sub x} control unless the ratio of energy from natural gas to variable plants is greater than 2:1. A more appropriate methodology, however, would find a significantly lower degradation of the emissions benefit than suggested by Katzenstein and Apt.

Mills, A.; Wiser, R.; Milligan, M.; O'Malley, M.

2009-01-01T23:59:59.000Z

484

January 4, 2011  

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

cause any major problems. Outages: None. Upcoming downtimes: Need to do some work on rack 22 - clean up and rearrange some things. This will affect STAR db and will take 5...

485

Global potential for wind-generated electricity  

Science Journals Connector (OSTI)

...individual wind farm involves...individual turbines, costs for...operations and maintenance (O&M...downtime for maintenance accounts...installed turbines reflecting the fact that maintenance is normally...relatively low wind conditions...

Xi Lu; Michael B. McElroy; Juha Kiviluoma

2009-01-01T23:59:59.000Z

486

UCHC Competency Checklist: ORIENTATION to ED CHARTING (Pulsecheck) Position Title: Registered Nurse, JDH Employee Name: Unit: ED  

E-Print Network (OSTI)

password- Help Desk Signing charts: my charts Pulsecheck Password Display & Tool Bar Mail B. Main Tracking documentation errors Downtime F. Tool Bar Archives Mail Patient data Labels Visits Change view All G. Access

Oliver, Douglas L.

487

3M's Motor Challenge Showcase Demonstration Project  

E-Print Network (OSTI)

. Cost control procedures are put into place and the team begins creating the specifications and drawings needed to physically complete the projects. Procurement of equipment, selection of craft labor, downtime coordination and field follow-up is all... to Management for Funding Approval Follow-up Obtain Authority For Expenditure vn Implementation Cost Control Procedures Engineer Specifications, Design Schedule Downtime Procure Equipment Select Contractor Field Follow-up vm Follow-up Measure...

Schultz, S. C.

488

Completion of the ORNL Fuel Cycle Research and Development (FCR&D) Level 4 Milestone – Sigma Team – Off-Gas – ORNL – FT-14OR031202, MS# M4FT-14OR0312027, “Support to PNNL Kr-85 Preliminary Optimization Study”, due May 30, 2014  

SciTech Connect

This letter and attached emails document the completion of the FCR&D Level 4 milestone for the Sigma Team – Off-Gas – ORNL work package (FT-14OR031202), “Support to PNNL Kr-85 Preliminary Optimization Study” (M4FT-14OR0312027), due May 30, 2014. Support to this effort included providing a literature search and providing a significant number of reference documents covering more than 30 years of past work on Kr recovery, recovery system designs, and past cost analyses. In addition, ORNL provided support on several conference calls to establish an analysis approach for the current study and to review progress.

Jubin, Robert T. [ORNL] [ORNL

2014-05-30T23:59:59.000Z

489

Method and apparatus for steam mixing a nuclear fueled electricity generation system  

DOE Patents (OSTI)

A method and apparatus for improving the efficiency and performance of a nuclear electrical generation system that comprises the addition of steam handling equipment to an existing plant that results in a surprising increase in plant performance. More particularly, a gas turbine electrical generation system with heat recovery boiler is installed along with a micro-jet high pressure and a low pressure mixer superheater. Depending upon plant characteristics, the existing moisture separator reheater (MSR) can be either augmented or done away with. The instant invention enables a reduction in T.sub.hot without a derating of the reactor unit, and improves efficiency of the plant's electrical conversion cycle. Coupled with this advantage is a possible extension of the plant's fuel cycle length due to an increased electrical conversion efficiency. The reduction in T.sub.hot further allows for a surprising extension of steam generator life. An additional advantage is the reduction in erosion/corrosion of secondary system components including turbine blades and diaphragms. The gas turbine generator used in the instant invention can also replace or augment existing peak or emergency power needs. Another benefit of the instant invention is the extension of plant life and the reduction of downtime due to refueling.

Tsiklauri, Georgi V. (Richland, WA); Durst, Bruce M. (Kennewick, WA)

1996-01-01T23:59:59.000Z

490

SSRL BEAM PORT SCHEDULE  

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

5-4 5-4 Nov. 15, 2010 Nov. 16, 2010 Nov. 17, 2010 Nov. 18, 2010 Nov. 19, 2010 Nov. 20, 2010 Nov. 21, 2010 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU BEAM LINE 8-1 Nov. 15, 2010 Nov. 16, 2010 Nov. 17, 2010 Nov. 18, 2010 Nov. 19, 2010 Nov. 20, 2010 Nov. 21, 2010 Unscheduled Unscheduled Unscheduled 3269 S.SUN 3269 S.SUN 3269 S.SUN 3269 S.SUN

491

A REVIEW OF THE COMMON CAUSES OF BOILER FAILURE IN THE SUGAR INDUSTRY  

E-Print Network (OSTI)

Unscheduled boiler outages in process industries are a major problem resulting not only in expensive emergency repairs, but also loss of production. This paper draws on the experience of the author's company relating to common failures of pressure parts of boilers. The paper identifies the most common types of pressure part failure and the metallurgical mechanism involved. With a knowledge of the underlying failure mechanism a number of basic causes can be identified. The paper suggests solutions that, if implemented, can reduce the incidence of unscheduled outages and thereby improve profitability.

K B Mcintyre

492

Applauding the performing seal  

SciTech Connect

Whether the culprit is a pump, valve, compressor, or flanged pipe connection, the end result is the same: process-fluid leakage damages the environment and is costly to operators, in terms of lost product, lost production due to downtime, and the replacement of damaged process equipment. Hard-to-handle fluids, such as abrasive slurries of coal and flyash, can damage the seals that contain them, allowing potentially harmful fluids to escape. Even more insidious is the often-invisible escape of volatile organic compounds (VOCs) from equipment that handles liquid petroleum, petroleum by-products and chemicals. This paper reports that seal manufacturers are using their ingenuity to minimize the escape of liquid and gaseous emissions. One approach uses the power of magnetic attraction to create a seal along a rotating pump shaft by positioning magnetic fluids there. Ferrofluidics Corp. starts by creating a magnetic fluid - essentially a colloidal suspension of ultrafine magnetic salts dispersed in a carrier fluid - which is then used as a liquid O-ring seal in conjunction with a mechanical seal. The seal apparatus consists of a doughnut-shaped sandwich (centered around the pump shaft), with a permanent magnet as the middle layer, and a washer of magnetically permeable material on either side.

Not Available

1992-03-01T23:59:59.000Z

493

Tagged Neutron, Anti-neutron and K-Long beams in an Upgraded MIPP Spectrometer  

E-Print Network (OSTI)

The MIPP experiment operating with an upgraded data acquisition system will be capable of acquiring data at the rate of 3000 events per second. Currently we are limited to a rate of 30 Hz due to the bottlenecks in the data acquisition electronics of the Time Projection Chamber (TPC). With the speeded up DAQ, MIPP will be capable of acquiring data at the rate of $\\approx$5 million events per day. This assumes a conservative beam duty cycle of 4~sec spill every 2 minutes with a 42% downtime for main injector beam manipulations for the $\\bar{p}$ source. We show that such a setup is capable of producing tagged neutron, anti-neutron and $K^0_L$ beams that are produced in the MIPP cryogenic hydrogen target using proton, anti-proton and $K^{\\pm}$ beams. These tagged beams can be used to study calorimeter responses for use in studies involving the Particle Flow Algorithm (PFA). The energy of these tagged beams will be known to better than 2% on a particle by particle level by means of constrained fitting. We expect a tagged beam rate in the tens of thousands a day. The MIPP spectrometer thus offers a unique opportunity to study the response of calorimeters to neutral particles.

Rajendran Raja

2007-01-23T23:59:59.000Z

494

Assessment and management of roof fall risks in underground coal mines  

Science Journals Connector (OSTI)

Accidents caused by roof falls are commonly faced problems of underground coal mines. These accidents may have detrimental effects on workers in the form of injury, disability or fatality as well as mining company due to downtimes, interruptions in the mining operations, equipment breakdowns, etc. This study proposes a risk and decision analysis methodology for the assessment and management of risk associated with mine roof falls in underground coal mines. In the proposed methodology, risk assessment requires the determination of probabilities, possible consequences and cost of consequences. Then the risk is managed by the application of decision-making principles. The probabilities are determined by the analysis of 1141 roof fall data from 12 underground mines in the Appalachian region. The consequences are assessed based on the type of injuries observed after roof falls and the place of the mining activity. The cost of consequences is modeled by the so-called “relative cost criterion”. A decision analysis framework is developed in order to manage the evaluated risk for a single mine. Then this model is extended to a regional model for the management of the roof fall risks in the mines of whole Appalachia. The proposed model is illustrated with an example and it is found to be a powerful technique for coping with uncertainties and the management of roof fall risks.

H.S.B. Duzgun; H.H. Einstein

2004-01-01T23:59:59.000Z

495

Wind turbine reliability :understanding and minimizing wind turbine operation and maintenance costs.  

SciTech Connect

Wind turbine system reliability is a critical factor in the success of a wind energy project. Poor reliability directly affects both the project's revenue stream through increased operation and maintenance (O&M) costs and reduced availability to generate power due to turbine downtime. Indirectly, the acceptance of wind-generated power by the financial and developer communities as a viable enterprise is influenced by the risk associated with the capital equipment reliability; increased risk, or at least the perception of increased risk, is generally accompanied by increased financing fees or interest rates. This paper outlines the issues relevant to wind turbine reliability for wind turbine power generation projects. The first sections describe the current state of the industry, identify the cost elements associated with wind farm O&M and availability and discuss the causes of uncertainty in estimating wind turbine component reliability. The latter sections discuss the means for reducing O&M costs and propose O&M related research and development efforts that could be pursued by the wind energy research community to reduce cost of energy.

Walford, Christopher A. (Global Energy Concepts. Kirkland, WA)

2006-03-01T23:59:59.000Z

496

Optimisation of gearbox replacement policy using vibration measurement data  

Science Journals Connector (OSTI)

Gearbox system reliability is a critical factor in the success of any industrial project. Poor reliability directly affects both the project's revenue stream through increased operation and maintenance (O&M) costs and reduced availability to the system due to its downtime. Indirectly, the acceptance of the system by the financial and developer communities as a viable enterprise is influenced by the risk associated with the capital equipment reliability; increased risk, or at least the perception of increased risk, is generally accompanied by increased financing fees or interest rates. However, this paper explores a reliability based on a developed an analytical mathematical method for predicting remaining lifetime of cracked gear tooth. The development is focused specifically on the investigation of a generalised statistical method for characterising and predicting system Weibull density function degradation (hazard rate). Using this method, optimal preventive age replacement policy is determined to maximise gearbox system reliability, and consequently an optimal cost analysis can be estimated. A simple geared system is used as a medium for real data collection, where the torsional vibration acceleration was measured and analysed. The results indicate that the knowledge of the remaining lifetime and the optimised replacement cost of the faulty gear can enhance the process of scheduling maintenance, ordering spare parts and using resources; consequently a reduction of maintenance cost.

Mohamed Ibrahim Khalil; Mohamed Sabry A. El-morsy; Shawki A. Abouel-seoud

2012-01-01T23:59:59.000Z

497

Biennial Assessment of the Fifth Power Plan Transmission Issues  

E-Print Network (OSTI)

by the partners in the Colstrip 500 kV transmission lines (Northwestern Energy, Puget Sound Energy, Portland unscheduled electricity flows over transmission lines leading to increased risks to electric systemBiennial Assessment of the Fifth Power Plan Transmission Issues INTRODUCTION The Fifth Power Plan

498

Page 1 of 9 MCP 670.1, Work Time Attendance  

E-Print Network (OSTI)

Policy and Procedure MCP 670.1, Work Time Attendance Effective/January 12, 2011 ABSTRACT: The purposePage 1 of 9 MCP 670.1, Work Time Attendance UC San Diego Health System UC San Diego Health System of unscheduled employee absences in the work force. RELATED POLICIES: UCSDHS MCP 786.1, "Timekeeping Policies

Gleeson, Joseph G.

499

December 7, 2010  

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

7 7 December 7 PDSF Users Meeting 12/7/10 Attending: Eric, Katie and Jay from NERSC and users Andrei, Yushu, Thomas, Jeff P., Craig, Joanna Cluster status: Cluster has been full most of the time and is full today. STAR and ALICE running a steady stream of grid jobs. Outages: Yesterday there were GPFS problems related to the kernal issue on some nodes that had not yet been upgraded. This prevented interactive logins for a while. Upcoming downtimes: At some point there will be downtime for home and common replacement. HPSS has a downtime Thursday 12/9. A networking change is needed on eliza16-18 and that will happen 12/8 for a couple hours. New hardware: The new torque server is up and the plan is to use the nodes being retired from racks 23 and 24 to test it. We will need to test

500

Human Herpesvirus 6 DNA Levels in Cerebrospinal Fluid Due to Primary Infection Differ from Those Due to Chromosomal Viral Integration and Have Implications for Diagnosis of Encephalitis  

Science Journals Connector (OSTI)

...Encephalitis Published ahead of print on 17 January 2007. Katherine N. Ward 1 Corresponding author. Mailing address: Centre...1250-1256. 7 Clark, D. A., M. Ait-Khaled, A. C. Wheeler, I. M. Kidd, J. E. McLaughlin, M. A. Johnson, P...

Katherine N. Ward; Hoe Nam Leong; Anton D. Thiruchelvam; Claire E. Atkinson; Duncan A. Clark

2007-01-17T23:59:59.000Z