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


1

CBS | OpenEI Community  

Open Energy Info (EERE)

CBS CBS Home Kch's picture Submitted by Kch(24) Member 9 April, 2013 - 13:30 MHK Cost Breakdown Structure Draft CBS current energy GMREC LCOE levelized cost of energy marine energy MHK ocean energy The generalized Cost Breakdown Structure (CBS) for marine and hydrokinetic (MHK) projects is a hierarchical structure designed to facilitate the collection and organization of lifecycle costs of any type of MHK project, including wave energy converters and current energy convertners. At a high level, the categories in the CBS will be applicable to all projects; at a detailed level, however, the CBS includes many cost categories that will pertain to one project but not others. It is expected that many of the detailed levels of the CBS will be populated with "NA" or left blank.Upload

2

MHK Cost Breakdown Structure Draft | OpenEI Community  

Open Energy Info (EERE)

MHK Cost Breakdown Structure Draft MHK Cost Breakdown Structure Draft Home > Groups > Water Power Forum Kch's picture Submitted by Kch(24) Member 9 April, 2013 - 13:30 CBS current energy GMREC LCOE levelized cost of energy marine energy MHK ocean energy The generalized Cost Breakdown Structure (CBS) for marine and hydrokinetic (MHK) projects is a hierarchical structure designed to facilitate the collection and organization of lifecycle costs of any type of MHK project, including wave energy converters and current energy convertners. At a high level, the categories in the CBS will be applicable to all projects; at a detailed level, however, the CBS includes many cost categories that will pertain to one project but not others. It is expected that many of the detailed levels of the CBS will be populated with "NA" or left blank.

3

Structure Breakdown Workshop Schedule  

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

Breakdown Breakdown Workshop SLAC, Orange Room August 28 - 30 , 2000 Announcement Workshop Poster Workshop Goals: The Goal of the workshop is to review understanding of warm structure breakdown phenomena, to define common terms for comparing tests and to identify avenues for further study. For a partial bibliography, please view the following URL : http://www-project.slac.stanford.edu/lc/wkshp/RFBreakdwn/references/publist.htm Schedule and Presentations: Monday, August 28 8:30 - Operation Experience and Definition of Problem Moderator - G. Loew (initial questions) Opening remarks and introduction (C. Adolphsen) (15min) CERN Structure Operation Results (W. Wuensch) (30 min) NLCTA Structure Operation Results (C. Adolphsen) (30 min) ASTA Structure Operation Results (R. Loewen) (20 min)

4

DOE Work Breakdown Structure Handbook  

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

This handbook provides suggested guidance and best practices on the development of product-oriented Work Breakdown Structures (WBS) that should be used by all projects within DOE to organize and...

5

Cost Codes and the Work Breakdown Structure  

Directives, Delegations, and Requirements

The chapter discusses the purpose of the work breakdown structure (WBS) and code of account (COA) cost code system, shows the purpose and fundamental structure of both the WBS and the cost code system, and explains the interface between the two systems.

1997-03-28T23:59:59.000Z

6

Breakdown Anodization (BDA) for hierarchical structures of titanium oxide  

E-Print Network (OSTI)

Breakdown Anodization (BDA) of titanium dioxide is a very promising, fast fabrication method to construct micro-scale and nano-scale structures on titanium surfaces. This method uses environmentally friendly electrolytes, ...

Choi, Soon Ju, S.M. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

7

PHENIX Work Breakdown Structure. Cost and schedule review copy  

SciTech Connect

The Work Breakdown Structure (WBS) Book begins with this Overview section, which contains the high-level summary cost estimate, the cost profile, and the global construction schedule. The summary cost estimate shows the total US cost and the cost in terms of PHENIX construction funds for building the PHENIX detector. All costs in the WBS book are shown in FY 1993 dollars. Also shown are the institutional and foreign contributions, the level of pre-operations funding, and the cost of deferred items. Pie charts are presented at PHENIX WBS level 1 and 2 that show this information. The PHENIX construction funds are shown broken down to PHENIX WBS level 3 items per fiscal year, and the resulting profile is compared to the RHIC target profile. An accumulated difference of the two profiles is also shown. The PHENIX global construction schedule is presented at the end of the Overview section. Following the Overview are sections for each subsystem. Each subsystem section begins with a summary cost estimate, cost profile, and critical path. The total level 3 cost is broken down into fixed costs (M&S), engineering costs (EDIA) and labor costs. Costs are further broken down in terms of PHENIX construction funds, institutional and foreign contributions, pre-operations funding, and deferred items. Also shown is the contingency at level 3 and the level 4 breakdown of the total cost. The cost profile in fiscal years is shown at level 3. The subsystem summaries are followed by the full cost estimate and schedule sheets for that subsystem. These detailed sheets are typically carried down to level 7 or 8. The cost estimate shows Total, M&S, EDIA, and Labor breakdowns, as well as contingency, for each WBS entry.

Not Available

1994-02-01T23:59:59.000Z

8

Microsoft Word - CBS News Index  

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

Building Science Newsletter Index Building Science Newsletter Index All CBS Newsletters that are in print are also available on the web at: http://eetd.lbl.gov/cbs/newsletter/CBSNews.html Articles are listed here by title in the order they appear. Summer 1998 (This is the final issue. See new EETD Newsletter, beginning Spring 99.) Reducing the Federal Energy Bill - Berkeley Lab's Work with the Federal Energy Management Program. (Allan Chen, p.1.) News from the DC Office: Regional Builder Option Packages: A Simplified Guide for Constructing Energy Star Homes (Donald Mauritz, p.3.) A Survey: Indoor Air Quality in Schools. (Joan Daisey and William Angell, p. 4.) International Energy-Efficiency Standards. (Mirka Della Cava, p.5.) Energy Plus: The Merger of BLAST and DOE-2. (Dru Crawley, p.6.)

9

CBS News Table of Contents  

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

previous issues of Center for Building Science News... previous issues of Center for Building Science News... 1993 1994 1995 1996 1997 1998 Winter Spring Summer Fall Winter Spring Summer Fall Winter Spring Summer Fall Winter Spring Summer Fall Winter Summer Continues as EETD News Publication Information | Credits | Sources of More Information | Energy Crossroads The Center for Building Science Newswas a publication of the Environmental Energy Technologies Division from 1993 through 1998. It has been replaced by Environmental Energy Technologies Division News,whose first issue appeared in Spring 1999. A complete index of the CBS Newsletter is available as a downloadable file by pressing here. Also, bound editions of all issues of the CBS News will be available for a limited time. Email here to request a copy. Center for Building Science News #18, Summer 1998

10

Structure test results from SLAC (NLCTA) show breakdown and damage at  

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

test results from SLAC (NLCTA) show breakdown and damage at test results from SLAC (NLCTA) show breakdown and damage at gradients well below expectations from single cavity tests. The papers and presentations listed here illustrate some recent work on the topic. SLAC meeting notes are found here. Overview - Basic understanding of the role of particulate contaminants (Hasan Padamsee, PAC97) Literature study - Field emission and high voltage breakdown - (presentation by D. Burke 1996) References listed in D. Burke summary: SLAC Breakdown in S-band structures (Loew and Wang 1988) High Gradient studies in structures (Loew and Wang 1990) High Gradient tests (Wang et.al. 1994) Properties of Periodic Accelerating Structures for Linear Colliders (Wang 1989) Field emission in high gradient structures - (Loew and Wang -School 1997)

11

X-Band Photonic Band-Gap Accelerator Structure Breakdown Experiment  

SciTech Connect

In order to understand the performance of photonic band-gap (PBG) structures under realistic high gradient, high power, high repetition rate operation, a PBG accelerator structure was designed and tested at X band (11.424 GHz). The structure consisted of a single test cell with matching cells before and after the structure. The design followed principles previously established in testing a series of conventional pillbox structures. The PBG structure was tested at an accelerating gradient of 65 MV/m yielding a breakdown rate of two breakdowns per hour at 60 Hz. An accelerating gradient above 110 MV/m was demonstrated at a higher breakdown rate. Significant pulsed heating occurred on the surface of the inner rods of the PBG structure, with a temperature rise of 85 K estimated when operating in 100 ns pulses at a gradient of 100 MV/m and a surface magnetic field of 890 kA/m. A temperature rise of up to 250 K was estimated for some shots. The iris surfaces, the location of peak electric field, surprisingly had no damage, but the inner rods, the location of the peak magnetic fields and a large temperature rise, had significant damage. Breakdown in accelerator structures is generally understood in terms of electric field effects. These PBG structure results highlight the unexpected role of magnetic fields in breakdown. The hypothesis is presented that the moderate level electric field on the inner rods, about 14 MV/m, is enhanced at small tips and projections caused by pulsed heating, leading to breakdown. Future PBG structures should be built to minimize pulsed surface heating and temperature rise.

Marsh, Roark A.; /MIT /MIT /NIFS, Gifu /JAERI, Kyoto /LLNL, Livermore; Shapiro, Michael A.; Temkin, Richard J.; /MIT; Dolgashev, Valery A.; Laurent, Lisa L.; Lewandowski, James R.; Yeremian, A.Dian; Tantawi, Sami G.; /SLAC

2012-06-11T23:59:59.000Z

12

Cascade and breakdown in scale-free networks with community structure  

Science Journals Connector (OSTI)

The cascade failures in scale-free networks with community structure are studied and cascade propagation of such networks with different modularity parameters is simulated. It is found that the network with small modularity is much easier to trigger cascade failures than that of the larger one. Furthermore, different removal strategies have some what large effects on the cascade failures aftereffect. The simulations also show that larger modularity and reserve capacity coefficient will delay the breakdown caused by a cascade of network. This is particularly important for such real networks with community as traffic networks, distribution networks, and electrical power grids.

Jian-jun Wu; Zi-you Gao; Hui-jun Sun

2006-12-19T23:59:59.000Z

13

Visualization of Intricate Flow Structures for Vortex Breakdown Analysis Xavier Tricoche  

E-Print Network (OSTI)

Hansen University of Utah Figure 1: Vortex breakdown bubble in numerical simulation of a cylindrical to study their impact on flight stability. Yet, to fully exploit the huge amount of information contained

Utah, University of

14

Born-Oppenheimer breakdown effects and hyperfine structure in the rotational spectra of SbF and SbCl  

Science Journals Connector (OSTI)

Pure rotational spectra have been measured for the ground electronic states of SbF and SbCl. The molecules were prepared by laser ablation of Sb metal in the presence of SF6 or Cl2, respectively. Their spectra were measured with a cavity pulsed jet Fourier transform microwave spectrometer. Although both molecules have two unpaired electrons, they are subject to Hund’s coupling case (c), and have X10+ ground states. The spectra have been interpreted with the formalism of 1?+ molecules. For both molecules spectra of several isotopomers have been measured in the ground and first excited vibrational states. Large hyperfine splittings attributable to both nuclear quadrupole coupling and nuclear spin-rotation coupling have been observed. A Dunham-type analysis has produced unusually large Born-Oppenheimer breakdown parameters, which are interpreted in terms of the electronic structures of the molecules.

Stephen A. Cooke; Michael C.L. Gerry

2005-01-01T23:59:59.000Z

15

Biofuel breakdown | EMSL  

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

Biofuel breakdown Biofuel breakdown SCF1 frees plant sugars in lignin for sustainable biofuels Lignin, the tough woody polymer in the walls of plant, binds and protects cellulose...

16

Work Breakdown Structure and Plant/Equipment Designation System Numbering Scheme for the High Temperature Gas- Cooled Reactor (HTGR) Component Test Capability (CTC)  

SciTech Connect

This white paper investigates the potential integration of the CTC work breakdown structure numbering scheme with a plant/equipment numbering system (PNS), or alternatively referred to in industry as a reference designation system (RDS). Ideally, the goal of such integration would be a single, common referencing system for the life cycle of the CTC that supports all the various processes (e.g., information, execution, and control) that necessitate plant and equipment numbers be assigned. This white paper focuses on discovering the full scope of Idaho National Laboratory (INL) processes to which this goal might be applied as well as the factors likely to affect decisions about implementation. Later, a procedure for assigning these numbers will be developed using this white paper as a starting point and that reflects the resolved scope and outcome of associated decisions.

Jeffrey D Bryan

2009-09-01T23:59:59.000Z

17

Breakdown of QCD coherence ?  

E-Print Network (OSTI)

We reconsider the calculation of a non-global QCD observable and find the possible breakdown of QCD coherence. This breakdown arises as a result of wide angle soft gluon emission developing a sensitivity to emission at small angles and it leads to the appearance of super-leading logarithms. We use the `gaps between jets' cross-section as a concrete example and illustrate that the new logarithms are intimately connected with the presence of Coulomb gluon contributions. Numerical estimates of their potential phenomenological significance are presented.

A. Kyrieleis; J. R. Forshaw; M. H. Seymour

2006-12-16T23:59:59.000Z

18

Nuclear Envelope Breakdown Can Substitute for Primary Envelopment-Mediated Nuclear Egress of Herpesviruses  

Science Journals Connector (OSTI)

...15 August 2011 research-article Structure and Assembly Nuclear Envelope Breakdown...herpesvirus-induced nuclear envelope breakdown...Journal Article Research Support, Non-U...Microscopy, Electron Nuclear Envelope metabolism...

Barbara G. Klupp; Harald Granzow; Thomas C. Mettenleiter

2011-06-15T23:59:59.000Z

19

Laser-Induced Breakdown Spectroscopy  

E-Print Network (OSTI)

LIBS-1 Laser-Induced Breakdown Spectroscopy LIBS ANALYSIS OF METAL SURFACES Last updated: June 17, 2014 #12;LIBS-2 Laser­Induced Breakdown Spectroscopy (LIBS) LIBS ANALYSIS OF METAL SURFACES of species at a distance or in hard­to­reach or hazardous environments. Laser­Induced Breakdown Spectroscopy

Nizkorodov, Sergey

20

Planned waveguide electric field breakdown studies  

SciTech Connect

This paper presents an experimental setup for X-band rf breakdown studies. The setup is composed of a section of WR90 waveguide with a tapered pin located at the middle of the waveguide E-plane. Another pin is used to rf match the waveguide so it operates in a travelling wave mode. By adjusting the penetration depth of the tapered pin, different surface electric field enhancements can be obtained. The setup will be used to study the rf breakdown rate dependence on power flow in the waveguide for a constant maximum surface electric field on the pin. Two groups of pins have been designed. The Q of one group is different and very low. The other has a similar Q. With the test of the two groups of pins, we should be able to discern how the net power flow and Q affect the breakdown. Furthermore, we will apply an electron beam treatment to the pins to study its effect on breakdown. Overall, these experiments should be very helpful in understanding rf breakdown phenomena and could significantly benefit the design of high gradient accelerator structures.

Wang Faya; Li Zenghai [SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025 (United States)

2012-12-21T23:59:59.000Z

Note: This page contains sample records for the topic "breakdown structure cbs" 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

Nervous breakdown causes  

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

Nervous breakdown causes Nervous breakdown causes Name: Renee Nuckols Status: N/A Age: N/A Location: N/A Country: N/A Date: Around 1993 Question: Physiologically, what causes a mental/nervous breakdown besides normal everyday stress? Is it a process that kills neurons? Also please include some internal and external symptoms that occur prior to, during, and after a nervous breakdown. Replies: "Nervous breakdown" may be a misnomer, though. What "breaks down" is not so much the nerves and neurons, but the adrenal glands. A more accurate term would be the "exhaustion phase of the general adaption syndrome," but obviously that is quite a mouthful. Excessive STRESS is what can cause "nervous breakdowns." Stress includes the obvious things like exam pressures, trouble with parents or teachers, peer pressure, but also includes things like a significant personal achievement, making a major purchase, changes in routines of life (sleeping, eating habits), moving to a different part of town - even the change in seasons and temperatures. It can come from almost anything which causes a disturbance in normal living. Stress triggers a number of physiological changes collectively termed "GENERAL ADAPTATION SYNDROME." There are three phases: 1) alarm, 2) resistance, and 3) exhaustion. These phases are controlled and regulated by the adrenal glands. Your adrenal glands lie just above your kidneys and are composed of inner and outer parts. The inner part is called the adrenal medulla, and it secretes the hormones adrenaline and noradrenaline. These hormones help your body deal with stressful situations. If you were alone and met a gang in some back alley, your adrenal glands would flood your body with the hormones, your blood pressure, heart rate, sweat production would shoot way high! Your body is in a "FIGHT or FLIGHT" mode. (Just thinking about getting in such a situation may have caused some stress!) Well, whenever your body deals with smaller stresses, the same hormones are released. The outer part of the adrenal glands is the adrenal cortex. They also produce hormones, but slightly different ones: glucocorticoids and mineralcorticoids. Glucocorticoids can increase blood sugar levels profoundly, while mineralcorticoids affect mineral excretion. These hormones are largely responsible for helping the body deal with prolonged stress. They help provide extra energy and blood supply. For instance, if you had a whole week of finals, your adrenal cortex would work overtime as you burn the midnight oil studying. These instances are the "resistance" phase of the general adaptation syndrome.

22

Breakdown of Coherence ?  

E-Print Network (OSTI)

In a recent paper, Albrecht Kyrieleis, Jeff Forshaw and I discovered a new tower of super-leading logarithms in gaps between jets cross sections. After discussions with the referee of our paper and further investigation, we have come to view this as a breakdown of naive coherence for initial state radiation. In this talk I illustrate this statement in a simple way, and show how it results in the super-leading logarithms.

Michael H. Seymour

2007-10-15T23:59:59.000Z

23

Microbial breakdown of Phaeocystis mucopolysaccharides  

Science Journals Connector (OSTI)

It was shown that the incomplete degradation of mucopolysaccharides was not due to inherent resistance to breakdown in parts of the mucus carbohydrates but

24

REQUEST BY WESTINGHOUSE POWER GENERATION, A FORMER DIVISION OF CBS CORPORATION, FOR AN  

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

CONTRACT NO. CONTRACT NO. DE-AC21-95MC30247; DOE WAIVER DOCKET W(A)-98-006 [ORO-737] Westinghouse Power Generation, a former division of CBS Corporation (hereinafter referred to as "the Contractor"), has requested an advance waiver of worldwide rights in Subject Inventions made in the course of or under Department of Energy (DOE) Contract No. DE-AC21- 95MC30247. This contract covers Phase 2 of DOE's Advance Turbine System (ATS) program. The goal of the ATS program is to develop and commercialize ultra-high efficiency, environmentally superior, and cost-competitive gas turbine systems for base-load applications in the utility, independent power producer, and industrial markets. The purposes of Phase 2 were to complete conceptual design of a selected system, identify technical barrier issues and begin

25

REQUEST BY WESTINGHOUSE POWER GENERATION, A FORMER DIVISION OF CBS CORPORATION, FOR AN  

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

COOPERATIVE COOPERATIVE AGREEMENT NO. DE-FC21-95MC32267; DOE WAIVER DOCKET W(A)-96-002 [ORO-620] Westinghouse Power Generation, a former division of CBS Corporation (hereinafter referred to as "the Participant"), has made a timely request for an advance waiver of worldwide rights in Subject Inventions made in the course of or under Department of Energy (DOE) Cooperative Agreement No. DE-FC21-95MC32267. The goal of this project is to continue development of the advance turbine system (ATS) technology and address the key barrier issues to its commercialization. In particular, the Participant will demonstrate (at an appropriate scale) the technology readiness of parts and subsystems critical to its gas-fired ATS. The work is sponsored by the Office of Fossil Energy. This cooperative agreement is Phase 3 of DOE's ATS

26

REQUEST BY WESTINGHOUSE POWER GENERATION, A FORMER DIVISION OF CBS CORPORATION, FOR AN  

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

GRANT NO. GRANT NO. DE-FG21-94MC32071; DOE WAIVER DOCKET W(A)-98-005 [ORO-736] Westinghouse Power Generation, a former division of CBS Corporation (hereinafter referred to as "the Grantee"), has requested an advance waiver of worldwide rights in Subject Inventions made in the course of or under Department of Energy (DOE) Grant No. DE-FG21-94MC32071. The goal of the grant was to perform system analysis, selection and optimization to develop the next generation of gas-fired advanced turbine systems (ATS's) for green field and repowered electricity generation applications. The goal of the ATS program is to develop and commercialize ultra-high efficiency, environmentally superior, and cost-competitive gas turbine systems for base- load applications in the utility, independent power producer, and industrial markets. This work

27

RF BREAKDOWN STUDIES USING PRESSURIZED CAVITIES  

SciTech Connect

Many present and future particle accelerators are limited by the maximum electric gradient and peak surface fields that can be realized in RF cavities. Despite considerable effort, a comprehensive theory of RF breakdown has not been achieved and mitigation techniques to improve practical maximum accelerating gradients have had only limited success. Part of the problem is that RF breakdown in an evacuated cavity involves a complex mixture of effects, which include the geometry, metallurgy, and surface preparation of the accelerating structures and the make-up and pressure of the residual gas in which plasmas form. Studies showed that high gradients can be achieved quickly in 805 MHz RF cavities pressurized with dense hydrogen gas, as needed for muon cooling channels, without the need for long conditioning times, even in the presence of strong external magnetic fields. This positive result was expected because the dense gas can practically eliminate dark currents and multipacting. In this project we used this high pressure technique to suppress effects of residual vacuum and geometry that are found in evacuated cavities in order to isolate and study the role of the metallic surfaces in RF cavity breakdown as a function of magnetic field, frequency, and surface preparation. One of the interesting and useful outcomes of this project was the unanticipated collaborations with LANL and Fermilab that led to new insights as to the operation of evacuated normal-conducting RF cavities in high external magnetic fields. Other accomplishments included: (1) RF breakdown experiments to test the effects of SF6 dopant in H2 and He gases with Sn, Al, and Cu electrodes were carried out in an 805 MHz cavity and compared to calculations and computer simulations. The heavy corrosion caused by the SF6 components led to the suggestion that a small admixture of oxygen, instead of SF6, to the hydrogen would allow the same advantages without the corrosion in a practical muon beam line. (2) A 1.3 GHz RF test cell capable of operating both at high pressure and in vacuum with replaceable electrodes was designed, built, and power tested in preparation for testing the frequency and geometry effects of RF breakdown at Argonne National Lab. At the time of this report this cavity is still waiting for the 1.3 GHz klystron to be available at the Wakefield Test Facility. (3) Under a contract with Los Alamos National Lab, an 805 MHz RF test cavity, known as the All-Seasons Cavity (ASC), was designed and built by Muons, Inc. to operate either at high pressure or under vacuum. The LANL project to use the (ASC) was cancelled and the testing of the cavity has been continued under the grant reported on here using the Fermilab Mucool Test Area (MTA). The ASC is a true pillbox cavity that has performed under vacuum in high external magnetic field better than any other and has demonstrated that the high required accelerating gradients for many muon cooling beam line designs are possible. (4) Under ongoing support from the Muon Acceleration Program, microscopic surface analysis and computer simulations have been used to develop models of RF breakdown that apply to both pressurized and vacuum cavities. The understanding of RF breakdown will lead to better designs of RF cavities for many applications. An increase in the operating accelerating gradient, improved reliability and shorter conditioning times can generate very significant cost savings in many accelerator projects.

Johnson, Rolland

2014-09-21T23:59:59.000Z

28

RF breakdown effects in microwave power amplifiers  

E-Print Network (OSTI)

Electrical stresses in the transistors of high-efficiency switching power amplifiers can lead to hot-electron-induced "breakdown" in these devices. This thesis explores issues related to breakdown in the Transcom TC2571 ...

Arumilli, Gautham Venkat

2007-01-01T23:59:59.000Z

29

Comparative genomics of citric-acid producing Aspergillus niger ATCC 1015 versus enzyme-producing CBS 513.88  

SciTech Connect

The filamentous fungus Aspergillus niger exhibits great diversity in its phenotype. It is found globally, both as marine and terrestrial strains, produces both organic acids and hydrolytic enzymes in high amounts, and some isolates exhibit pathogenicity. Although the genome of an industrial enzyme-producing A. niger strain (CBS 513.88) has already been sequenced, the versatility and diversity of this species compels additional exploration. We therefore undertook whole genome sequencing of the acidogenic A. niger wild type strain (ATCC 1015), and produced a genome sequence of very high quality. Only 15 gaps are present in the sequence and half the telomeric regions have been elucidated. Moreover, sequence information from ATCC 1015 was utilized to improve the genome sequence of CBS 513.88. Chromosome-level comparisons uncovered several genome rearrangements, deletions, a clear case of strain-specific horizontal gene transfer, and identification of 0.8 megabase of novel sequence. Single nucleotide polymorphisms per kilobase (SNPs/kb) between the two strains were found to be exceptionally high (average: 7.8, maximum: 160 SNPs/kb). High variation within the species was confirmed with exo-metabolite profiling and phylogenetics. Detailed lists of alleles were generated, and genotypic differences were observed to accumulate in metabolic pathways essential to acid production and protein synthesis. A transcriptome analysis revealed up-regulation of the electron transport chain, specifically the alternative oxidative pathway in ATCC 1015, while CBS 513.88 showed significant up regulation of genes associated with biosynthesis of amino acids that are abundant in glucoamylase A, tRNA-synthases and protein transporters.

Andersen, Mikael R.; Salazar, Margarita; Schaap, Peter; van de Vondervoort, Peter; Culley, David E.; Thykaer, Jette; Frisvad, Jens C.; Nielsen, Kristian F.; Albang, Richard; Albermann, Kaj; Berka, Randy; Braus, Gerhard; Braus-Stromeyer, Susanna A.; Corrochano, Luis; Dai, Ziyu; van Dijck, Piet; Hofmann, Gerald; Lasure, Linda L.; Magnuson, Jon K.; Menke, Hildegard; Meijer, Martin; Meijer, Susan; Nielsen, Jakob B.; Nielsen, Michael L.; van Ooyen, Albert; Pel, Herman J.; Poulsen, Lars; Samson, Rob; Stam, Hein; Tsang, Adrian; van den Brink, Johannes M.; ATkins, Alex; Aerts, Andrea; Shapiro, Harris; Pangilinan, Jasmyn; Salamov, Asaf; Lou, Yigong; Lindquist, Erika; Lucas, Susan; Grimwood, Jane; Grigoriev, Igor V.; Kubicek, Christian P.; Martinez, Diego; van Peij, Noel; Roubos, Johannes A.; Nielsen, Jens B.; Baker, Scott E.

2011-06-01T23:59:59.000Z

30

COST BREAKDOWN AWARD NO: START DATE: EXPIRATION DATE: FISCAL...  

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

COST BREAKDOWN AWARD NO: START DATE: EXPIRATION DATE: FISCAL YEAR BREAKDOWN OF FUNDS ELEMENTS FY FY FY FY FY TOTAL Direct Labor Overhead Materials Supplies Travel Other Direct...

31

Asymmetric Bimodal Accelerator Cavity for Raising rf Breakdown Thresholds  

SciTech Connect

We consider an axisymmetric microwave cavity for an accelerator structure whose eigenfrequency for its second lowest TM-like axisymmetric mode is twice that of the lowest such mode, and for which the fields are asymmetric along its axis. In this cavity, the peak amplitude of the rf electric field that points into either longitudinal face can be smaller than the peak field which points out. Computations show that a structure using such cavities might support an accelerating gradient about 47% greater than that for a structure using similar single-mode cavities, without an increase in breakdown probability.

Kuzikov, S. V. [Omega-P, Inc., 258 Bradley Street, New Haven, Connecticut 06510 (United States); Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanov Street, Nizhny Novgorod, 603950 (Russian Federation); Kazakov, S. Yu. [Omega-P, Inc., 258 Bradley Street, New Haven, Connecticut 06510 (United States); Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States); Jiang, Y. [Physics Department, Yale University, New Haven, Connecticut 06520-8120 (United States); Hirshfield, J. L. [Omega-P, Inc., 258 Bradley Street, New Haven, Connecticut 06510 (United States); Physics Department, Yale University, New Haven, Connecticut 06520-8120 (United States)

2010-05-28T23:59:59.000Z

32

Ignition with Laser Break-Down  

Science Journals Connector (OSTI)

It is considered that ignition with laser break-down is one of the applications of solid-state lasers. This paper shows basic experimental results indicating the advantages of laser...

Furutani, Hirohide; Saito, Takeshi

33

E-Print Network 3.0 - abnormal breakdown characteristic Sample...  

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

present the measurements and analysis of laser- induced breakdown processes in dry... -power microwave breakdown based on measured laser breakdown observations....

34

CBS News Tip Sheets  

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

News Tip Sheets News Tip Sheets Table of Contents Summer 1998 Reducing the Federal Energy Bill A Survey: Indoor Air Quality in Schools International Energy-Efficiency Standards EnergyPlus: The Merger of BLAST and DOE-2 Winter 1998 Five-Lab Study Examines Carbon-Reduction Strategies Reducing Leaking Electricity The Efficient Window Collaborative Efficiency of Exterior Exposed Duct Work Fall 1997 The Home Energy Saver Utilities Group Aids in Restructuring Process THERM: Modeling Building Heat Flow Thermal Performance of Phase Change Wallboard for Residential Cooling Summer 1997 Improved Productivity and Health from Better Indoor Environments Carbon Dioxide Emissions from Industrialized Countries Building Software Tools with Interoperability Spring 1997 Indoor Air Quality in New Energy-Efficient Houses

35

Prevention of breakdown behind railgun projectiles  

DOE Patents (OSTI)

An electromagnetic railgun accelerator system, for accelerating projectiles by a plasma arc, introduces a breakdown inhibiting gas into the railgun chamber behind the accelerating projectile. The breakdown inhibiting gas, which absorbs electrons, is a halide or a halide compound such as fluorine or SF[sub 6]. The gas is introduced between the railgun rails after the projectile has passed through inlets in the rails or the projectile; by coating the rails or the projectile with a material which releases the gas after the projectile passes over it; by fabricating the rails or the projectile or insulators out of a material which releases the gas into the portions of the chamber through which the projectile has travelled. The projectile may have a cavity at its rear to control the release of ablation products. 12 figs.

Hawke, R.S.

1992-10-13T23:59:59.000Z

36

Prevention of breakdown behind railgun projectiles  

DOE Patents (OSTI)

An electromagnetic railgun accelerator system, for accelerating projectiles by a plasma arc, introduces a breakdown inhibiting gas into the railgun chamber behind the accelerating projectile. The breakdown inhibiting gas, which absorbs electrons, is a halide or a halide compound such as fluorine or SF[sub 6]. The gas is introduced between the railgun rails after the projectile has passed through inlets in the rails or the projectile; by coating the rails or the projectile with a material which releases the gas after the projectile passes over it; by fabricating the rails or the projectile or insulators out of a material which releases the gas into the portions of the chamber through which the projectile has travelled. The projectile may have a cavity at its rear to control the release of ablation products. 12 figs.

Hawke, R.S.

1992-09-01T23:59:59.000Z

37

current energy | OpenEI Community  

Open Energy Info (EERE)

current energy current energy Home Kch's picture Submitted by Kch(24) Member 9 April, 2013 - 13:30 MHK Cost Breakdown Structure Draft CBS current energy GMREC LCOE levelized cost of energy marine energy MHK ocean energy The generalized Cost Breakdown Structure (CBS) for marine and hydrokinetic (MHK) projects is a hierarchical structure designed to facilitate the collection and organization of lifecycle costs of any type of MHK project, including wave energy converters and current energy convertners. At a high level, the categories in the CBS will be applicable to all projects; at a detailed level, however, the CBS includes many cost categories that will pertain to one project but not others. It is expected that many of the detailed levels of the CBS will be populated with "NA" or left blank.Upload

38

MHK | OpenEI Community  

Open Energy Info (EERE)

MHK MHK Home Kch's picture Submitted by Kch(24) Member 9 April, 2013 - 13:30 MHK Cost Breakdown Structure Draft CBS current energy GMREC LCOE levelized cost of energy marine energy MHK ocean energy The generalized Cost Breakdown Structure (CBS) for marine and hydrokinetic (MHK) projects is a hierarchical structure designed to facilitate the collection and organization of lifecycle costs of any type of MHK project, including wave energy converters and current energy convertners. At a high level, the categories in the CBS will be applicable to all projects; at a detailed level, however, the CBS includes many cost categories that will pertain to one project but not others. It is expected that many of the detailed levels of the CBS will be populated with "NA" or left blank.Upload

39

levelized cost of energy | OpenEI Community  

Open Energy Info (EERE)

levelized cost of energy levelized cost of energy Home Kch's picture Submitted by Kch(24) Member 9 April, 2013 - 13:30 MHK Cost Breakdown Structure Draft CBS current energy GMREC LCOE levelized cost of energy marine energy MHK ocean energy The generalized Cost Breakdown Structure (CBS) for marine and hydrokinetic (MHK) projects is a hierarchical structure designed to facilitate the collection and organization of lifecycle costs of any type of MHK project, including wave energy converters and current energy convertners. At a high level, the categories in the CBS will be applicable to all projects; at a detailed level, however, the CBS includes many cost categories that will pertain to one project but not others. It is expected that many of the detailed levels of the CBS will be populated with "NA" or left blank.Upload

40

ocean energy | OpenEI Community  

Open Energy Info (EERE)

ocean energy ocean energy Home Kch's picture Submitted by Kch(24) Member 9 April, 2013 - 13:30 MHK Cost Breakdown Structure Draft CBS current energy GMREC LCOE levelized cost of energy marine energy MHK ocean energy The generalized Cost Breakdown Structure (CBS) for marine and hydrokinetic (MHK) projects is a hierarchical structure designed to facilitate the collection and organization of lifecycle costs of any type of MHK project, including wave energy converters and current energy convertners. At a high level, the categories in the CBS will be applicable to all projects; at a detailed level, however, the CBS includes many cost categories that will pertain to one project but not others. It is expected that many of the detailed levels of the CBS will be populated with "NA" or left blank.Upload

Note: This page contains sample records for the topic "breakdown structure cbs" 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

GMREC | OpenEI Community  

Open Energy Info (EERE)

GMREC GMREC Home Kch's picture Submitted by Kch(24) Member 9 April, 2013 - 13:30 MHK Cost Breakdown Structure Draft CBS current energy GMREC LCOE levelized cost of energy marine energy MHK ocean energy The generalized Cost Breakdown Structure (CBS) for marine and hydrokinetic (MHK) projects is a hierarchical structure designed to facilitate the collection and organization of lifecycle costs of any type of MHK project, including wave energy converters and current energy convertners. At a high level, the categories in the CBS will be applicable to all projects; at a detailed level, however, the CBS includes many cost categories that will pertain to one project but not others. It is expected that many of the detailed levels of the CBS will be populated with "NA" or left blank.Upload

42

marine energy | OpenEI Community  

Open Energy Info (EERE)

marine energy marine energy Home Kch's picture Submitted by Kch(24) Member 9 April, 2013 - 13:30 MHK Cost Breakdown Structure Draft CBS current energy GMREC LCOE levelized cost of energy marine energy MHK ocean energy The generalized Cost Breakdown Structure (CBS) for marine and hydrokinetic (MHK) projects is a hierarchical structure designed to facilitate the collection and organization of lifecycle costs of any type of MHK project, including wave energy converters and current energy convertners. At a high level, the categories in the CBS will be applicable to all projects; at a detailed level, however, the CBS includes many cost categories that will pertain to one project but not others. It is expected that many of the detailed levels of the CBS will be populated with "NA" or left blank.Upload

43

A Theory for the Comparative RF Surface Fields at Destructive Breakdown for Various Metels  

SciTech Connect

By destructive breakdown we mean a breakdown event that results in surface melting over large areas on the iris tip region of an accelerator structure. The melting is the result of the formation of macroscopic areas of plasma in contact with the surface. The plasma bombards the surface with an intense ion current ({approx}10{sup 8} A/cm{sup 2}), which is equivalent to a pressure on the order of a thousand Atmospheres. A radial gradient in the pressure produces a ponderomotive force that causes molten copper to migrate away from the iris tip, resulting in a measurable change in the iris shape. This distortion in the iris shape in turn produces an error in the cell-to-cell phase shift of the accelerating wave with a consequent loss in synchronism with the electron beam and a reduction in the effective accelerating gradient. Assuming a long lifetime is desired for the structure, such breakdowns must be avoided or at least limited in number. The accelerating gradient at which these breakdowns begin to occur imposes, therefore, an absolute limit on an operationally attainable gradient. The destructive breakdown limit (DBL) on the accelerating gradient depends on a number of factors, such as the geometry of the irises and coupler, the accuracy of the cell-to-cell tuning (''field flatness''), and the properties of the metal used in the high E-field regions of the structure. In this note we consider only the question of the dependence of the DBL on the metal used in the high surface field areas of the structure. There are also various types of non-destructive breakdowns (NDB's) that occur during the ''processing'' period that, after the initial application of high power, is necessary to bring the gradient up to the desired operating level. During this period, as the input power and gradient are gradually increased, thousands of such NDB's occur. These breakdowns produce a collapse in the fields in the structure as energy stored in the fields is absorbed at the breakdown site. They are often marked by vacuum bursts and an increase in power reflected from the structure. The usual cause for NDB's during processing is the ''explosion'' of field emitters at sharp geometrical features on the metal surface. Exposed impurities in the metal surface can also produce NDB's as they are ''burned'' off by H-field heating or explosive field emission. The breakdown process can be roughly divided into four stages: (1) the formation of ''plasma spots'' at field emission sites, each spot leaving a crater-like footprint; (2) crater clustering, and the formation of areas with hundreds of overlapping craters; (3) surface melting in the region of a crater cluster; (4) the process after surface melting that leads to destructive breakdown.

Wilson, Perry; /SLAC

2006-03-20T23:59:59.000Z

44

Supercontinuum generation versus optical breakdown in CO2 gas  

Science Journals Connector (OSTI)

Threshold powers for optical breakdown (OB) and supercontinuum (SC) generation in high-pressure CO2 gas have been measured at different focusing conditions. It has been...

Ilkov, F A; Ilkova, L Sh; Chin, S L

1993-01-01T23:59:59.000Z

45

Empirical Features of Spontaneous and Induced Traffic Breakdowns in Free Flow at Highway Bottlenecks  

E-Print Network (OSTI)

Based on an empirical study of real field traffic data measured in 1996--2014 through road detectors installed on German freeways, we reveal physical features of empirical nuclei for spontaneous traffic breakdown in free flow at highway bottlenecks. It is shown that the source of a nucleus for traffic breakdown is the solely difference between empirical spontaneous and induced traffic breakdowns at a highway bottleneck. Microscopic traffic simulations with a stochastic traffic flow model in the framework of three-phase theory explain the empirical findings. It turns out that in the most cases, a nucleus for empirical spontaneous traffic breakdown occurs through an interaction of one of waves in free flow with an empirical permanent speed disturbance localized at a highway bottleneck. The wave is a localized structure in free flow, in which the total flow rate is larger and the speed averaged across the highway is smaller than outside the wave. The waves in free flow appear due to oscilations in the percentage...

Kerner, Boris S; Klenov, Sergey L; Rehborn, Hubert; Leibel, Michael

2015-01-01T23:59:59.000Z

46

Photo-Ionization and the Electrical Breakdown of Gases  

Science Journals Connector (OSTI)

25 June 1953 research-article Photo-Ionization and the Electrical Breakdown...theoretical investigation is made of the role of photo-ionization of the gas in the development...obtained experimentally. It is shown that photo-ionization can lead to electrical breakdown...

1953-01-01T23:59:59.000Z

47

Microsoft Word - SEC J_Appendix F - National Work Breakdown Str_Negotiated  

National Nuclear Security Administration (NNSA)

F, Page 1 F, Page 1 SECTION J APPENDIX F NATIONAL WORK BREAKDOWN STRUCTURE The Department of Energy, National Nuclear Security Administration (DOE/NNSA), Office of Defense Programs, manages a large, complex, and diverse portfolio of weapons activities. To help facilitate and integrate the management of this portfolio, the Office of Defense Programs is establishing a National Work Breakdown Structure (NWBS). The NWBS will provide a consistent framework for planning, programming, budgeting, and evaluation of work required to execute the Defense Programs mission. Over time, the NWBS is anticipated to be expanded to all NNSA and DOE program activities. The NWBS will be contained in a relational database that serves as an easy-to-use tool for DOE/NNSA

48

Atmospheric-pressure gas breakdown from 2 to 100 MHz  

SciTech Connect

We report a detailed study of breakdown voltage of atmospheric-pressure helium gas between two parallel-plate electrodes from 2 to 100 MHz. Experimental data show that the breakdown voltage reduces initially with increasing frequency due to a diminishing contribution of drift-dominated electron wall loss and then begins to increase with increasing frequency. The latter is contrary to the current understanding that relies largely on the electron wall loss mechanism. Particle-in-cell simulation suggests that rapid oscillation of the applied voltage prevents electrons from reaching their maximum achievable kinetic energy, thus compromising the ionization efficiency and increasing the breakdown voltage.

Walsh, J. L.; Zhang, Y. T.; Iza, F.; Kong, M. G. [Department of Electronic and Electrical Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU (United Kingdom)

2008-12-01T23:59:59.000Z

49

Understanding Sub-20 nm Breakdown Behavior of Liquid Dielectrics  

Science Journals Connector (OSTI)

Nanoscale confinement of dielectric molecules is expected to influence their breakdown mechanism in applications such as nanoprobe based machining, molecular electronics, and other related technologies. This Letter presents the first experimental study of the breakdown of nonpolar, nonthiolated liquid dielectrics in the nanometer regime and develops a field emission assisted avalanche based approach to model such behavior. The studies show that dielectric breakdown in the sub-20 nm regime is independent of the cathode materials and is dominated by the electron emission and atomic cluster migration due to the “sub-20 nm scale confinement of the liquid dielectric.”

Kumar R. Virwani; Ajay P. Malshe; Kamlakar P. Rajurkar

2007-07-06T23:59:59.000Z

50

Non-Gaussian Resistance Noise near Electrical Breakdown in Granular Materials  

E-Print Network (OSTI)

The distribution of resistance fluctuations of conducting thin films with granular structure near electrical breakdown is studied by numerical simulations. The film is modeled as a resistor network in a steady state determined by the competition between two biased processes, breaking and recovery. Systems of different sizes and with different levels of internal disorder are considered. Sharp deviations from a Gaussian distribution are found near breakdown and the effect increases with the degree of internal disorder. However, we show that in general this non-Gaussianity is related to the finite size of the system and vanishes in the large size limit. Nevertheless, near the critical point of the conductor-insulator transition, deviations from Gaussianity persist when the size is increased and the distribution of resistance fluctuations is well fitted by the universal Bramwell-Holdsworth-Pinton distribution.

C. Pennetta; E. Alfinito; L. Reggiani; S. Ruffo

2004-01-20T23:59:59.000Z

51

The Breakdown of Gases in High Frequency Electrical Fields  

Science Journals Connector (OSTI)

A theory is proposed to explain the mechanism of breakdown of gases in high frequency electrical fields. It is assumed that breakdown occurs when the electrical field and the frequency are such that an electron acquires the ionizing energy at the end of one mean free path. The field for breakdown is thus a function of the frequency of the applied potential and the ionization potential and pressure of the gas. The fields for breakdown of argon and xenon are calculated and expressed as functions of the frequency and the gas pressure. The calculated potentials are compared with experimental data, and good agreement is found for frequencies greater than 10×106 c.p.s.

Donald H. Hale

1948-05-01T23:59:59.000Z

52

A Theory for the RF Surface Field for Various Metals at the Destructive Breakdown Limit  

SciTech Connect

By destructive breakdown we mean a breakdown event that results in surface melting over a macroscopic area in a high E-field region of an accelerator structure. A plasma forms over the molten area, bombarding the surface with an intense ion current ({approx} 10{sup 8} A/cm{sup 2}), equivalent to a pressure of about a thousand Atmospheres. This pressure in turn causes molten copper to migrate away from the iris tip, resulting in measurable changes in the iris shape. The breakdown process can be roughly divided into four stages: (1) the formation of ''plasma spots'' at field emission sites, each spot leaving a crater-like footprint; (2) crater clustering, and the formation of areas with hundreds of overlapping craters; (3) surface melting in the region of a crater cluster; (4) the process after surface melting that leads to destructive breakdown. The physics underlying each of these stages is developed, and a comparison is made between the theory and experimental evidence whenever possible. The key to preventing breakdown lies in stage (3). A single plasma spot emits a current of several amperes, a portion of which returns to impact the surrounding area with a power density on the order 10{sup 7} Watt/cm{sup 2}. This power density is not quite adequate to melt the surrounding surface on a time scale short compared to the rf pulse length. In a crater field, however, the impact areas from multiple plasma spots overlap to provide sufficient power density for surface melting over an area on the order of 0.1 mm{sup 2} or more. The key to preventing breakdown is to choose an iris tip material that requires the highest power density (proportional to the square of the rf surface field) for surface melting, taking into account the penetration depth of the impacting electrons. The rf surface field required for surface melting (relative to copper) has been calculated for a large number elementary metals, plus stainless-steel and carbon.

Wilson, Perry B.; /SLAC

2007-03-06T23:59:59.000Z

53

Studies of electrical breakdown processes across vacuum gaps between metallic electrodes  

E-Print Network (OSTI)

Studies of electrical breakdown processes across vacuum gaps between metallic electrodes L Keywords: Magnetic insulation Vacuum electrical breakdown Bacteria-induced electrical breakdown Accelerator a b s t r a c t An experimental program to elucidate the physical causes of electrical breakdown

Gilson, Erik

54

Hanford tanks initiative (HTI) work breakdown structure (WBS)dictionary  

SciTech Connect

This dictionary lists the scope, deliverables, and interfaces for the various work elements of the Hanford Tanks Initiative. Cost detail is included for information only.

Mckinney, K.E.

1997-03-31T23:59:59.000Z

55

Double pulse laser induced breakdown spectroscopy; experimental study of  

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

Double pulse laser induced breakdown spectroscopy; experimental study of Double pulse laser induced breakdown spectroscopy; experimental study of lead emission intensity dependence on the wavelengths and sample matrix Title Double pulse laser induced breakdown spectroscopy; experimental study of lead emission intensity dependence on the wavelengths and sample matrix Publication Type Journal Article Year of Publication 2009 Authors Piscitelli, Vincent, Mauro A. Martinez, Alberto J. Fernandez, Jhanis J. Gonzalez, Xianglei Mao, and Richard E. Russo Journal Spectrochimica Acta Part B Volume 64 Issue 2 Pagination 147-154 Date Published 02/2009 Keywords Double pulse LIBS, laser induced breakdown spectroscopy, lead Abstract Lead (Pb) emission intensity (atomic line 405.78 nm) dependence on the sample matrix (metal alloy) was studied by means of collinear double pulse (DP)-laser induced breakdown spectroscopy (LIBS). The measurement of the emission intensity produced by three different wavelength combinations (i.e. I:532 nm-II:1064 nm, I:532 nm-II:532 nm, and I:532 nm-II:355 nm) from three series of standard reference materials showed that the lead atomic line 405.78 nm emission intensity was dependent on the sample matrix for all the combination of wavelengths, however reduced dependency was found for the wavelength combination I:532 nm-II:355 nm.

56

Interferometric investigation of optical breakdown in air at  

Science Journals Connector (OSTI)

An investigation was made of the thermal processes which accompany optical breakdown in air at the surface of a metallic target. A titanium target was subjected to radiation of power density ~0.3 MW/cm2 from a CO2 gas-discharge laser, for a period of ~ 1 msec. The use of interferometric diagnostics having adequate spatial and temporal resolution (~300 ? and ~30 usec) made it possible to describe the heating of the air at the target surface before breakdown, the formation and propagation of the breakdown plasma, the absorption of laser radiation in it, and the heating of the air by the plasma. Estimates were made of the plasma parameters.

A V Bondarenko; V P Voronina; I I Gorodnicheva; E V Dan'shchikov; A I Zakharchenko; F V Lebedev; A V Ryazanov; M M Smakotin

1980-01-01T23:59:59.000Z

57

E-Print Network 3.0 - all-fiber-coupled laser-induced breakdown...  

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

coupled laser-induced breakdown Search Powered by Explorit Topic List Advanced Search Sample search results for: all-fiber-coupled laser-induced breakdown Page: << < 1 2 3 4 5 > >>...

58

Ultrafast laser induced breakdown spectroscopy of electrode/electrolyte  

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

Ultrafast laser induced breakdown spectroscopy of electrode/electrolyte Ultrafast laser induced breakdown spectroscopy of electrode/electrolyte interfaces Title Ultrafast laser induced breakdown spectroscopy of electrode/electrolyte interfaces Publication Type Journal Article Year of Publication 2012 Authors Zormpa, Vasileia, Jaroslaw Syzdek, Xianglei Mao, Richard E. Russo, and Robert Kostecki Journal Applied Physics Letters Volume 100 Issue 23 Date Published 05-2012 ISSN 0003-6951 Keywords electrochemical electrodes, graphite, high-speed optical techniques, laser beam effects, organic compounds, pyrolysis, solid electrolytes Abstract Direct chemical analysis of electrode/electrolyte interfaces can provide critical information on surface phenomena that define and control the performance of Li-based battery systems. In this work, we introduce the use of ex situ femtosecond laser induced breakdown spectroscopy to probe compositional variations within the solid electrolyte interphase (SEI) layer. Nanometer-scale depth resolution was achieved for elemental and molecular depth profiling of SEI layers formed on highly oriented pyrolytic graphite electrodes in an organic carbonate-based electrolyte. This work demonstrates the unique ability of ultrafast laser spectroscopy as a highly versatile, light element-sensitive technique for direct chemical analysis of interfacial layers in electrochemical energy storage systems.

59

APPROXIMATE SOLUTION OF A CLASS OF QUEUEING NETWORKS WITH BREAKDOWNS  

E-Print Network (OSTI)

breakdowns and are subsequently repaired. The network topology is a pipeline with feedback from the final of operational servers at each node in the pipeline. This model is in general intractable, however an iterative], but changed the nature of the fail- ure so that queues were preserved during repair peri- ods. The same

Imperial College, London

60

Initial breakdown pulses in intracloud lightning flashes and their relation to terrestrial gamma ray flashes  

E-Print Network (OSTI)

Initial breakdown pulses in intracloud lightning flashes and their relation to terrestrial gamma breakdown stage of 10 intracloud lightning flashes that may have produced terrestrial gamma ray flashes, and S. Xiong (2013), Initial breakdown pulses in intracloud lightning flashes and their relation

Cummer, Steven A.

Note: This page contains sample records for the topic "breakdown structure cbs" 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

Studies of electrical breakdown processes across vacuum gaps between metallic electrodes  

E-Print Network (OSTI)

Studies of electrical breakdown processes across vacuum gaps between metallic electrodes L Available online 3 June 2013 Keywords: Magnetic insulation Vacuum electrical breakdown Bacteria-induced electrical breakdown Accelerator a b s t r a c t An experimental program to elucidate the physical causes

Gilson, Erik

62

Gas breakdown in an atmospheric pressure radio-frequency capacitive plasma source  

Science Journals Connector (OSTI)

Gas breakdown is studied in an atmospheric pressure rf capacitive plasma source developed for materials applications. At a rf frequency of 13.56 MHz breakdown voltage is largely a function of the product of the pressure and the discharge gap spacing approximating the Paschen curve. However breakdown voltage varies substantially with rf frequency due to a change in the electron loss mechanism. A large increase in breakdown voltage is observed when argon oxygen or nitrogen is added to helium despite their lower ionization potential. Discussion is given for optimal breakdown conditions at atmospheric pressure.

Jaeyoung Park; I. Henins; H. W. Herrmann; G. S. Selwyn

2001-01-01T23:59:59.000Z

63

Dynamics of local micro-breakdown in the Geiger mode of avalanche photodiodes  

SciTech Connect

Mathematical modeling methods were used to study the dynamics of micro-breakdown development in structures of silicon avalanche photodiodes. The constructed model considers the locality of the avalanchexs multiplication region appearing during single photon absorption and the delay of the avalanchexs current spreading over the rear electrode of the diode. The calculations showed two different phases of transient process of the formation of the electrical signal, i.e., the rapid and slow ones due to current spreading and ordinary RC recharge, respectively. The load resistances required to implement the pulsed mode of operation of the structures of the avalanche photodiode were calculated for a series of actual diode capacitances and spreading resistances of the rear electrode.

Verhovtseva, A. V., E-mail: alevteena@gmail.com; Gergel, V. A. [Russian Academy of Sciences, Kotel'nikov Institute of Radio Engineering and Electronics (Russian Federation)], E-mail: gergel@mail.cplire.ru

2009-07-15T23:59:59.000Z

64

Laser-induced breakdown spectroscopy (LIBS): a new spectrochemical technique  

SciTech Connect

We have used the breakdown spark from a focused laser beam to generate analytically useful emission spectra of minor constituents in air and other carrier gases. The medium was sampled directly. It was not necessary to reduce the sample to solution nor to introduce electrodes. The apparatus is particularly simple; a pulsed laser, spectrometer, and some method for time resolution. The latter is essential in laser-induced-breakdown spectroscopy (LIBS) because of the strong early continuum. High temperatures in the spark result in vaporization of small particles, dissociation of molecules, and excitation of atomic and ionic spectra, including species which are normally difficult to detect. In one application, we have monitored beryllium in air at conventrations below 1 ..mu..g/m/sup 3/, which is below 1 ppB (w/w). In another we have monitored chlorine and fluorine atoms in real time. LIBS has the potential for real-time direct sampling of contaminants in situ.

Radziemski, L.J.; Loree, T.R.; Cremers, D.A.

1982-01-01T23:59:59.000Z

65

Detecting excess ionizing radiation by electromagnetic breakdown of air  

SciTech Connect

A scheme is proposed for detecting a concealed source of ionizing radiation by observing the occurrence of breakdown in atmospheric air by an electromagnetic wave whose electric field surpasses the breakdown field in a limited volume. The volume is chosen to be smaller than the reciprocal of the naturally occurring concentration of free electrons. The pulse duration of the electromagnetic wave must exceed the avalanche breakdown time (10-200 ns) and could profitably be as long as the statistical lag time in ambient air (typically, microseconds). Candidate pulsed electromagnetic sources over a wavelength range, 3 mm>{lambda}>10.6 {mu}m, are evaluated. Suitable candidate sources are found to be a 670 GHz gyrotron oscillator with 200 kW, 10 {mu}s output pulses and a Transversely Excited Atmospheric-Pressure (TEA) CO{sub 2} laser with 30 MW, 100 ns output pulses. A system based on 670 GHz gyrotron would have superior sensitivity. A system based on the TEA CO{sub 2} laser could have a longer range >100 m.

Granatstein, Victor L.; Nusinovich, Gregory S. [Center for Applied Electromagnetics, Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742 (United States)

2010-09-15T23:59:59.000Z

66

Borehole breakdown pressure with drilling fluids—I. Empirical results  

Science Journals Connector (OSTI)

Mining and civil engineering industries sometimes use drilling muds for stabilizing a borehole during drilling wells for methane drainage, geothermal energy and radioactive waste disposal. Standard theories predicting borehole breakdown pressure assume breakdown occurs when a small fracture initiates at a location where the largest tangential stress at the borehole reaches the tensile strength of formation. Fracturing tests conducted in this study, however, showed that when drilling fluid was used as an injection fluid, borehole breakdown did not occur even if a fracture initiated at a borehole wall. Borehole breakdown occurred when the initiated fracture became unstable after significant growth [with 0.76 cm (0.3 in.) to 7.62 cm (3 in.) in length]. The test results showed that all drilling muds had a tendency to seal narrow natural fractures or fractures induced by high borehole pressure. The sealing effect of the mud stabilized fractures and prevented fracture propagation. This effect is one of the primary factors for controlling wellbore stability. In this work [1], more than 40 large rock samples [76.2 × 76.2 × 76.2 cm (30 × 30 × 30 in.)] were fractured to test the drilling fluid effect on fracture initiation and fracture propagation around a borehole. The results show that borehole breakdown pressure is highly dependent on the Young's modulus of the formation, wellbore size and type of the drilling fluids. Note that the conventional linear wellbore stability theory has ignored all these facts. The results of this experiment are intended to apply to the lost circulation problems from an induced fracture or to the interpretation of the in situ stress measurements with gelled fluids where drilling or fracturing fluids contain significant amount of solid components. Similar phenomena occur for the standard hydraulic fracturing fluids; however, the process zone and the high flow friction at the narrow fracture tip become as important as the gel and solid plugging effect shown in this paper. Hence, the results should be modified before being applied to standard fracturing fluids.

N. Morita; A.D. Black; G.-F. Fuh

1996-01-01T23:59:59.000Z

67

Optical breakdown threshold investigation of 1064 nm laser induced air plasmas  

SciTech Connect

We present the theoretical and experimental measurements and analysis of the optical breakdown threshold for dry air by 1064 nm infrared laser radiation and the significance of the multiphoton and collisional cascade ionization process on the breakdown threshold measurements over pressures range from 10 to 2000 Torr. Theoretical estimates of the breakdown threshold laser intensities and electric fields are obtained using two distinct theories namely multiphoton and collisional cascade ionization theories. The theoretical estimates are validated by experimental measurements and analysis of laser induced breakdown processes in dry air at a wavelength of 1064 nm by focusing 450 mJ max, 6 ns, 75 MW max high-power 1064 nm IR laser radiation onto a 20 {mu}m radius spot size that produces laser intensities up to 3 - 6 TW/cm{sup 2}, sufficient for air ionization over the pressures of interest ranging from 10 to 2000 Torr. Analysis of the measured breakdown threshold laser intensities and electric fields are carried out in relation with classical and quantum theoretical ionization processes, operating pressures. Comparative analysis of the laser air breakdown results at 1064 nm with corresponding results of a shorter laser wavelength (193 nm) [M. Thiyagarajan and J. E. Scharer, IEEE Trans. Plasma Sci. 36, 2512 (2008)] and a longer microwave wavelength (10{sup 8} nm) [A. D. MacDonald, Microwave Breakdown in Gases (Wiley, New York, 1966)]. A universal scaling analysis of the breakdown threshold measurements provided a direct comparison of breakdown threshold values over a wide range of frequencies ranging from microwave to ultraviolet frequencies. Comparison of 1064 nm laser induced effective field intensities for air breakdown measurements with data calculated based on the collisional cascade and multiphoton breakdown theories is used successfully to determine the scaled collisional microwave portion. The measured breakdown threshold of 1064 nm laser intensities are then scaled to classical microwave breakdown theory after correcting for the multiphoton ionization process for different pressures and good agreement, regarding both pressure dependence and breakdown threshold electric fields, is obtained. The effect of the presence of submicron particles on the 1064 nm breakdown threshold was also investigated. The measurements show that higher breakdown field is required, especially at lower pressures, and in close agreement with classical microwave breakdown theory and measurements in air.

Thiyagarajan, Magesh; Thompson, Shane [Plasma Engineering Research Lab (PERL), College of Science and Engineering, Texas A and M University-Corpus Christi, Texas 78412 (United States)

2012-04-01T23:59:59.000Z

68

Enhancement of RF Breakdown Threshold of Microwave Cavities by Magnetic Insulation  

SciTech Connect

Limitations on the maximum achievable accelerating gradient of microwave cavities can influence the performance, length, and cost of particle accelerators. Gradient limitations are believed to be initiated by electron emission from the cavity surfaces. Here, we show that field emission is effectively suppressed by applying a tangential magnetic field to the cavity walls, so higher gradients can be achieved. Numerical simulations indicate that the magnetic field prevents electrons leaving these surfaces and subsequently picking up energy from the electric field. Our results agree with current experimental data. Two specific examples illustrate the implementation of magnetic insulation into prospective particle accelerator applications. The ultimate goal of several research efforts is to integrate high-gradient radio-frequency (rf) structures into next generation particle accelerators. For instance, the Muon Accelerator Program is looking at developing low-frequency cavities for muon cooling, and the International Linear Collider is optimizing the performance of 1.3 GHz rf structures aimed at designing a 1 TeV electron-positron collider. Furthermore, the High Gradient RF Collaboration is examining high frequency (f > 10 GHz) structures intended for an electron-positron collider operating at energies in the TeV range. In all this research, the accelerating gradient will be one of the crucial parameters affecting their design, construction, and cost. Limitations from rf breakdown strongly influence the development of accelerators since it limits the machine's maximum gradient. The emission of electrons from the cavity surfaces seemingly is a necessary stage in the breakdown process, acting either as a direct cause of breakdown or as precursor for other secondary effects. Typically, electron currents arise from sharp edges or cracks on the cavities surfaces, where the strength of the electric field is strongly enhanced compared to that of the nominal field when the surfaces of the cavity are perfect planes. Subsequently, a stream of emitted electrons can be accelerated by the rf electric field toward the opposing cavity walls. Upon impact, they heat a localized region, resulting in the eventual breakdown by a variety of secondary mechanisms. Therefore, it is advantageous to develop techniques that could suppress field emission within rf cavities. It has been proposed that high voltages up to about a gigavolt range may be sustained in voltage transformers, by adopting the principle of magnetic insulation in ultrahigh vacuum. The basic idea is to suppress field emission by applying a suitably directed magnetic field of sufficient strength to force the electrons orbits back on to the rf emitting surface. More recently, it was shown that magnetic insulation could be very effective in suppressing field emission and multipacting in rectangular coupler waveguides. Hence, the question arises whether the same principle is applicable to rf accelerating structures. In this Letter, we shall consider application of the concept to low-frequency (201-805 MHz) muon accelerator cavities.

Stratakis, D.; Gallardo, J.; Palmer, R.B.

2011-03-28T23:59:59.000Z

69

Vehicle Technologies Office: Fact #526: July 7, 2008 Price Breakdown for a  

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

6: July 7, 2008 6: July 7, 2008 Price Breakdown for a Gallon of Gasoline and a Gallon of Diesel to someone by E-mail Share Vehicle Technologies Office: Fact #526: July 7, 2008 Price Breakdown for a Gallon of Gasoline and a Gallon of Diesel on Facebook Tweet about Vehicle Technologies Office: Fact #526: July 7, 2008 Price Breakdown for a Gallon of Gasoline and a Gallon of Diesel on Twitter Bookmark Vehicle Technologies Office: Fact #526: July 7, 2008 Price Breakdown for a Gallon of Gasoline and a Gallon of Diesel on Google Bookmark Vehicle Technologies Office: Fact #526: July 7, 2008 Price Breakdown for a Gallon of Gasoline and a Gallon of Diesel on Delicious Rank Vehicle Technologies Office: Fact #526: July 7, 2008 Price Breakdown for a Gallon of Gasoline and a Gallon of Diesel on Digg

70

Breakdown of the Dipole Approximation in Strong-Field Ionization  

E-Print Network (OSTI)

We report the breakdown of the electric dipole approximation in the long-wavelength limit in strong-field ionization with linearly polarized few-cycle mid-infrared laser pulses at intensities on the order of 10$^{13}$ W/cm$^2$. Photoelectron momentum distributions were recorded by velocity map imaging and projected onto the beam propagation axis. We observe an increasing shift of the peak of this projection opposite to the beam propagation direction with increasing laser intensities. From a comparison with semi-classical simulations, we identify the combined action of the magnetic field of the laser pulse and the Coulomb potential as origin of our observations.

Ludwig, A; Mayer, B W; Phillips, C R; Gallmann, L; Keller, U

2014-01-01T23:59:59.000Z

71

Breakdown of the Dipole Approximation in Strong-Field Ionization  

E-Print Network (OSTI)

We report the breakdown of the electric dipole approximation in the long-wavelength limit in strong-field ionization with linearly polarized few-cycle mid-infrared laser pulses at intensities on the order of 10$^{13}$ W/cm$^2$. Photoelectron momentum distributions were recorded by velocity map imaging and projected onto the beam propagation axis. We observe an increasing shift of the peak of this projection opposite to the beam propagation direction with increasing laser intensities. From a comparison with semi-classical simulations, we identify the combined action of the magnetic field of the laser pulse and the Coulomb potential as origin of our observations.

A. Ludwig; J. Maurer; B. W. Mayer; C. R. Phillips; L. Gallmann; U. Keller

2014-08-11T23:59:59.000Z

72

Kinetic modeling of the Townsend breakdown in argon  

SciTech Connect

Kinetic modeling of the Townsend breakdown in argon was performed in the “forward-back” approximation. The kinetic model was found to adequately describe the left branch of the Paschen curve, and the important role of ionization by fast ions and atoms near the cathode, as well as the increase in secondary emission coefficient in strong electric fields described in the literature, was confirmed. The modeling also showed that the electron energy distribution function develops a beam of high-energy electrons and that the runaway effect, i.e., the monotonic increase of the mean electron energy with the distance from the cathode, occurs at the left branch of the Paschen curve.

Macheret, S. O.; Shneider, M. N. [Department of Mechanical and Aerospace Engineering, Princeton University, D-414 Engineering Quadrangle, Princeton, New Jersey 08544 (United States)] [Department of Mechanical and Aerospace Engineering, Princeton University, D-414 Engineering Quadrangle, Princeton, New Jersey 08544 (United States)

2013-10-15T23:59:59.000Z

73

Gas breakdown driven by L band short-pulse high-power microwave  

SciTech Connect

High power microwave (HPM) driven gas breakdown is a major factor in limiting the radiation and transmission of HPM. A method that HPM driven gas breakdown could be obtained by changing the aperture of horn antenna is studied in this paper. Changing the effective aperture of horn antenna can adjust the electric field in near field zone, leading to gas breakdown. With this method, measurements of air and SF{sub 6} breakdowns are carried out on a magnetically insulated transmission-line oscillators, which is capable of generating HPM with pulse duration of 30 ns, and frequency of 1.74 GHz. The typical breakdown waveforms of air and SF{sub 6} are presented. Besides, the breakdown field strengths of the two gases are derived at different pressures. It is found that the effects of air and SF{sub 6} breakdown on the transmission of HPM are different: air breakdown mainly shortens the pulse width of HPM while SF{sub 6} breakdown mainly reduces the peak output power of HPM. The electric field threshold of SF{sub 6} is about 2.4 times larger than that of air. These differences suggest that gas properties have a great effect on the transmission characteristic of HPM in gases.

Yang Yiming; Yuan Chengwei; Qian Baoliang [College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China)

2012-12-15T23:59:59.000Z

74

Electrical breakdown of a bubble in a water-filled capillary  

SciTech Connect

In this Communication, the electrical breakdown of a static bubble in a water-filled capillary generated in a dc electrical field is studied. We present experimental results which indicate that the liquid layer between capillary and bubble wall can have an important influence on the breakdown mechanism of the bubble. The breakdown electrical field (atmospheric pressure) without a liquid layer in a (vapor) bubble is 18 kV/cm. When a liquid layer is present, the electrical breakdown of an air bubble is observed at electrical fields typically two times smaller. Local plasma formation is observed in this case possibly due to bubble deformation.

Bruggeman, P.J.; Leys, C.A.; Vierendeels, J. A. [Department of Applied Physics, Research Unit Plasma Technology (RUPT), Faculty of Engineering, Ghent University, Rozier 44, B-9000 Ghent (Belgium); Department of Flow, Heat and Combustion Mechanics, Faculty of Engineering, Ghent University, Sint-Pietersnieuwstraat 41, B-9000 Ghent (Belgium)

2006-06-01T23:59:59.000Z

75

Laser Induced Breakdown Spectroscopy to Detect Copper Contamination in Transformer Insulation  

Science Journals Connector (OSTI)

Laser Induced Breakdown Spectroscopy combined with a laser-ablation based depth profiling technique is demonstrated for the detection of copper contamination in transformer insulation....

Aparna, N; Wazeem, M A; Vasa, Nilesh J; Sarathi, R; Sundara Rajan, J

76

Extracting Coal Ash Content from Laser-Induced Breakdown Spectroscopy (LIBS) Spectra by Multivariate Analysis  

Science Journals Connector (OSTI)

Laser-induced breakdown spectroscopy (LIBS) combined with partial least squares (PLS) analysis has been applied for the quantitative analysis of the ash content of coal in this...

Yao, Shunchun; Lu, Jidong; Dong, Meirong; Chen, Kai; Li, Junyan; Li, Jun

2011-01-01T23:59:59.000Z

77

Detecting excess ionizing radiation by electromagnetic breakdown of air  

Science Journals Connector (OSTI)

A scheme is proposed for detecting a concealed source of ionizing radiation by observing the occurrence of breakdown in atmospheric air by an electromagnetic wave whose electric field surpasses the breakdown field in a limited volume. The volume is chosen to be smaller than the reciprocal of the naturally occurring concentration of free electrons. The pulse duration of the electromagnetic wave must exceed the avalanchebreakdown time (10–200 ns) and could profitably be as long as the statistical lag time in ambient air (typically microseconds). Candidate pulsed electromagnetic sources over a wavelength range 3 ? mm > ? > 10.6 ? ? m are evaluated. Suitable candidate sources are found to be a 670 GHz gyrotron oscillator with 200 kW 10 ? ? s output pulses and a Transversely Excited Atmospheric-Pressure (TEA) CO 2 laser with 30 MW 100 ns output pulses. A system based on 670 GHz gyrotron would have superior sensitivity. A system based on the TEA CO 2 laser could have a longer range > 100 ? m .

Victor L. Granatstein; Gregory S. Nusinovich

2010-01-01T23:59:59.000Z

78

Isotope effects and Born-Oppenheimer breakdown in excited singlet states of the lithium dimer  

E-Print Network (OSTI)

Isotope effects and Born-Oppenheimer breakdown in excited singlet states of the lithium dimer A of infrared electronic transitions involving the 1 1 g state of 7 Li2 has instigated an investigation of Born-Oppenheimer and the leading vibrational and/or rotational Born-Oppenheimer breakdown terms for the X 1 g , A 1 u , B 1 u

Le Roy, Robert J.

79

Electron transfer through time dependent bridges: Differences between Franck–Condon and Born–Oppenheimer breakdown  

Science Journals Connector (OSTI)

We consider tunneling-mediated electron transfer through time dependent bridges. An approach is developed for computing corrections to the time dependent tunneling matrix element that arise from the breakdown of the Born–Oppenheimer Adiabatic approximation. Differences between Franck–Condon and Born–Oppenheimer breakdown are discussed in the context of bridge-mediated tunneling.

Antonios Teklos; Spiros S. Skourtis

2005-01-01T23:59:59.000Z

80

Wiedenhfer et al. Inter-Organizational Crisis Management Infrastructure for Electrical Power Breakdowns  

E-Print Network (OSTI)

learning. Keywords Crisis management, user-centered design, inter-organizational communication and learningWiedenhöfer et al. Inter-Organizational Crisis Management Infrastructure for Electrical Power Breakdowns Inter-Organizational Crisis Management Infrastructures for Electrical Power Breakdowns Torben

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


81

Visualization of laser-induced breakdown and Ying-Ling Chen and J. W. L. Lewis  

E-Print Network (OSTI)

Visualization of laser-induced breakdown and ignition Ying-Ling Chen and J. W. L. Lewis Center, Tennessee 37388-8897 ychen@utsi.edu, jlewis@utsi.edu Abstract: Laser-induced gas breakdown and ignition-going simulation modeling of laser-ignition. © 2001 Optical Society of American OCIS codes: (140.3440) Laser

Davis, Lloyd M.

82

Apparatus, system, and method for laser-induced breakdown spectroscopy  

DOE Patents (OSTI)

In laser-induced breakdown spectroscopy (LIBS), an apparatus includes a pulsed laser configured to generate a pulsed laser signal toward a sample, a constructive interference object and an optical element, each located in a path of light from the sample. The constructive interference object is configured to generate constructive interference patterns of the light. The optical element is configured to disperse the light. A LIBS system includes a first and a second optical element, and a data acquisition module. The data acquisition module is configured to determine an isotope measurement based, at least in part, on light received by an image sensor from the first and second optical elements. A method for performing LIBS includes generating a pulsed laser on a sample to generate light from a plasma, generating constructive interference patterns of the light, and dispersing the light into a plurality of wavelengths.

Effenberger, Jr., Andrew J; Scott, Jill R; McJunkin, Timothy R

2014-11-18T23:59:59.000Z

83

Titanium monoxide spectroscopy following laser-induced optical breakdown  

SciTech Connect

This work investigates Titanium Monoxide (TiO) in ablation-plasma by employing laser-induced breakdown spectroscopy (LIBS) with 1 to 10 TW/cm{sup 2} irradiance, pulsed, 13 nanosecond, Q-switched Nd:YAG laser radiation at the fundamental wavelength of 1064 nm. The analysis of TiO is based on our first accurate determination of transition line strengths for selected TiO A-X, B-X, and E-X transitions, particularly TiO A-X {gamma} and B-X {gamma} Prime bands. Electric dipole line strengths for the A{sup 3}{Phi}-X{sup 3}{delta} and B{sup 3}{Pi}-X{sup 3}{delta} bands of TiO are computed. The molecular TiO spectra are observed subsequent to laser-induced breakdown (LIB). We discuss analysis of diatomic molecular spectra that may occur simultaneously with spectra originating from atomic species. Gated detection is applied to investigate the development in time of the emission spectra following LIB. Collected emission spectra allow one to infer micro-plasma parameters such as temperature and electron density. Insight into the state of the micro-plasma is gained by comparing measurements with predictions of atomic and molecular spectra. Nonlinear fitting of recorded and computed diatomic spectra provides the basis for molecular diagnostics, while atomic species may overlap and are simultaneously identified. Molecular diagnostic approaches similar to TiO have been performed for diatomic molecules such as AlO, C{sub 2}, CN, CH, N{sub 2}, NH, NO and OH.

Parigger, Christian G.; Woods, Alexander C.; Keszler, Anna; Nemes, Laszlo; Hornkohl, James O. [The University of Tennessee/UT Space Institute, Center for Laser Applications, 411 B.H. Goethert Parkway, Tullahoma, TN 37388-9700 (United States); Chemical Research Center of the Hungarian Academy of Sciences, Institute of Materials and Environmental Chemistry, Pusztaszeri ut 59-67, H-1025 Budapest (Hungary); Chemical Research Center of the Hungarian Academy of Sciences, Laser Spectroscopy Laboratory, Pusztaszeri ut 59-67, H-1025 Budapest (Hungary); Hornkohl Consulting, Tullahoma, TN 37388 (United States)

2012-07-30T23:59:59.000Z

84

Measurements of electron avalanche formation time in W-band microwave air breakdown  

SciTech Connect

We present measurements of formation times of electron avalanche ionization discharges induced by a focused 110 GHz millimeter-wave beam in atmospheric air. Discharges take place in a free volume of gas, with no nearby surfaces or objects. When the incident field amplitude is near the breakdown threshold for pulsed conditions, measured formation times are {approx}0.1-2 {mu}s over the pressure range 5-700 Torr. Combined with electric field breakdown threshold measurements, the formation time data shows the agreement of 110 GHz air breakdown with the similarity laws of gas discharges.

Cook, Alan M.; Hummelt, Jason S.; Shapiro, Michael A.; Temkin, Richard J. [Plasma Science and Fusion Center, Massachusetts Institute of Technology, 167 Albany St., Cambridge, Massachusetts 02139 (United States)

2011-08-15T23:59:59.000Z

85

Development of laser induced breakdown spectroscopy instrumentatin for safeguards applications  

SciTech Connect

In September 2006, a Technical Meeting on Application of Laser Spectrometry Techniques in IAEA Safeguards was held at IAEA headquarters (HQ). One of the principal recommendations from this meeting was the need to 'pursue the development of novel complementary access instrumentation based on laser induced breakdown spectroscopy (LIBS) for the detection of gaseous and solid signatures and indicators of nuclear fuel cycle processes and associated materials.' Pursuant to this recommendation the Department of Safeguards (SG) under the Division of Technical Support (SGTS) convened the Experts and Users Advisory Meeting on Laser Induced Breakdown Spectroscopy (LIBS) for Safeguards Applications. This meeting was held at IAEA HQ from July 7-11,2008 and hosted by the Novel Technologies Unit (NTU). The meeting was attended by 12 LIBS experts from the Czech Republic, the European Commission, France, the Republic of Korea, the United States of America, Germany, the United Kingdom of Great Britain, Canada, and Northern Ireland. After a presentation of the needs of the IAEA inspectors, the LIBS experts were in agreement that needs as presented could be partially or fully fulfilled using LIBS instrumentation. The needs of the IAEA inspectors were grouped in the following broad categories: (1) Improvements to in-field measurements/environmental sampling; (2) Monitoring status of activity in a Hot Cell; (3) Verifying status of activity at a declared facility via process monitoring; and (4) Need for pre-screening of environmental samples before analysis. Under the Department of Energy/National Nuclear Security Administration (DOE/NNSA) Next Generation Safeguards Initiative (NGSI) Los Alamos National Laboratory is exploring three potential applications of LIBS for international safeguards. As part of this work, we are developing: (1) a user-friendly man-portable LIBS system to characterize samples across a wide range of elements in the periodic table from hydrogen up to heavy elements like plutonium and uranium; (2) a LIBS system that can be deployed in harsh environments such as gloveboxes and hot cells providing relative compositional analysis of process streams for example ratios like Cm/Pu and Cm/U; and (3) an inspector field deployable system that can be used to analyze the elemental composition of microscopic quantities of samples containing plutonium and uranium. In this paper we will describe our current development and performance testing results both in a fixed lab and measurements in field deployable configurations using LIBS instrumentation developed for applications to international safeguards.

Barefield Il, James E [Los Alamos National Laboratory; Clegg, Samuel M [Los Alamos National Laboratory; Le, Loan A [Los Alamos National Laboratory; Lopez, Leon N [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

86

Elemental analysis of cotton by laser-induced breakdown spectroscopy  

SciTech Connect

Laser-induced breakdown spectroscopy (LIBS) has been applied to the elemental characterization of unprocessed cotton. This research is important in forensic and fraud detection applications to establish an elemental fingerprint of U.S. cotton by region, which can be used to determine the source of the cotton. To the best of our knowledge, this is the first report of a LIBS method for the elemental analysis of cotton. The experimental setup consists of a Nd:YAG laser that operates at the fundamental wavelength as the LIBS excitation source and an echelle spectrometer equipped with an intensified CCD camera. The relative concentrations of elements Al, Ba, Ca, Cr, Cu, Fe, Mg, and Sr from both nutrients and environmental contributions were determined by LIBS. Principal component analysis was used to visualize the differences between cotton samples based on the elemental composition by region in the U.S. Linear discriminant analysis of the LIBS data resulted in the correct classification of >97% of the cotton samples by U.S. region and >81% correct classification by state of origin.

Schenk, Emily R.; Almirall, Jose R.

2010-05-01T23:59:59.000Z

87

Vacuum breakdown mechanisms, and X-ray pulses in accelerators  

Science Journals Connector (OSTI)

During the conditioning of evacuated accelerator tubes, groups of discrete X-ray signals with apparent energies of greater than 300 keV are observed. A mechanism to explain the X-ray emission is proposed in terms of a series of transient vacuum arc discharges. A review is given of vacuum breakdown mechanisms, and of the most likely processes occurring in accelerator tubes during the conditioning process. In the case of the vacuum accelerator tube, there is initially no gaseous medium, but the applied voltage of 30 kV between the tube electrodes is sufficient to lead to the formation of a vacuum arc if there are fine whiskers, impurities, or accelerated dust particles present. Such a vacuum discharge will have a very short life (?1 ?s), as the current of the arc will cause the collapse of the electrode voltage which is maintained by a small current through 600 M? resistors. During the discharge, electrons will escape into the accelerator tube, and fall through several sections to be finally arrested, producing the discrete X-ray signals. The vacuum arc will release charged molten droplets of anode material into the high-field region; after some delay, these droplets will trigger further arcs in different sections of the tube. The triggered arcs will be at the inner edges of the electrode where the droplets hit the electrode, and where electrons are most readily released into the accelerator tube. Thus a whole series of high energy X-ray signals are observed.

R Morrow; D.C Weisser

1996-01-01T23:59:59.000Z

88

Breakdown of large-scale circulation in turbulent rotating convection  

Science Journals Connector (OSTI)

Turbulent rotating convection in a cylinder is investigated both numerically and experimentally at Rayleigh number Ra=109 and Prandtl number ?=6.4. In this letter we discuss two topics: the breakdown under rotation of the domain-filling large-scale circulation (LSC) typical for confined convection, and the convective heat transfer through the fluid layer, expressed by the Nusselt number. The presence of the LSC is addressed for several rotation rates. For Rossby numbers Ro1.2 no LSC is found (the Rossby number indicates relative importance of buoyancy over rotation, hence small Ro indicates strong rotation). For larger Rossby numbers a precession of the LSC in anticyclonic direction (counter to the background rotation) is observed. It is shown that the heat transfer has a maximal value close to Ro=0.18 being about 15% larger than in the non-rotating case Ro=?. Since the LSC is no longer present at this Rossby value we conclude that the peak heat transfer is independent of the LSC.

R. P. J. Kunnen; H. J. H. Clercx; B. J. Geurts

2008-01-01T23:59:59.000Z

89

Elucidating the mechanisms behind pre-breakdown phenomena in transformer oil systems  

E-Print Network (OSTI)

The widespread use of dielectric liquids for high voltage insulation and power apparatus cooling is due to their greater electrical breakdown strength and thermal conductivity than gaseous insulators. In addition, their ...

Hwang, Jae-Won George, 1980-

2010-01-01T23:59:59.000Z

90

ITCZ breakdown in three-dimensional flows Chia-chi Wang and  

E-Print Network (OSTI)

and Miller 1976; Hack et al. 1989). Some of the disturbances may intensify and grow into tropical cy- clones may reform in the same general location. This process is referred to as "ITCZ breakdown" (Hack et al

Magnusdottir, Gudrun

91

Collision and diffusion in microwave breakdown of nitrogen gas in and around microgaps  

SciTech Connect

The microwave induced breakdown of N{sub 2} gas in microgaps was modeled using the collision frequency between electrons and neutral molecules and the effective electric field concept. Low pressure breakdown at the threshold electric field occurs outside the gap, but at high pressures it is found to occur inside the microgap with a large threshold breakdown electric field corresponding to a very large electron oscillation amplitude. Three distinct pressure regimes are apparent in the microgap breakdown: a low pressure multipactor branch, a mid-pressure Paschen branch, both of which occur in the space outside the microgap, and a high pressure diffusion-drift branch, which occurs inside the microgap. The Paschen and diffusion-drift branches are divided by a sharp transition and each separately fits the collision frequency model. There is evidence that considerable electron loss to the microgap faces accompanies the diffusion-drift branch in microgaps.

Campbell, J. D.; Lenters, G. T. [Grand Valley State University, Allendale, MI 49401 (United States)] [Grand Valley State University, Allendale, MI 49401 (United States); Bowman, A.; Remillard, S. K., E-mail: remillard@hope.edu [Hope College, Holland, MI 49423 (United States)

2014-01-15T23:59:59.000Z

92

The Free Energy of Glycogen-Lactic Acid Breakdown in Muscle  

Science Journals Connector (OSTI)

1 January 1929 research-article The Free Energy of Glycogen-Lactic Acid Breakdown in Muscle Dean Burk The Royal Society is collaborating with JSTOR to digitize, preserve...

1929-01-01T23:59:59.000Z

93

E-Print Network 3.0 - atria phosphatidylinositol breakdown Sample...  

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

breakdown Page: << < 1 2 3 4 5 > >> 1 ISSN: 1524-4539 Copyright 2010 American Heart Association. All rights reserved. Print ISSN: 0009-7322. Online Summary: ,25 presented...

94

Laser Ignition and Laser Induced Breakdown Spectroscopy in Engines Using Hollow Core Fiber Delivery  

Science Journals Connector (OSTI)

We describe the use of hollow core optical fibers to deliver laser sparks. The sparks are used to ignite engines and to enable air-to-fuel measurements by laser induced breakdown...

Joshi, Sachin; Yalin, Azer P; Dumitrescu, Cosmin; Olcmen, Semih; Puzinauskas, Paul

95

Glass-batch composition monitoring by laser-induced breakdown spectroscopy  

Science Journals Connector (OSTI)

Laser-induced breakdown spectroscopy is an almost ideal technique for the in situ monitoring of the composition of a glass batch before it enters the glass-melting furnace, saving a...

Lal, Bansi; Yueh, Fang-Yu; Singh, Jagdish P

2005-01-01T23:59:59.000Z

96

Substitutional Routing for Trunk Line Break-Down in the Teletransmission Network  

Science Journals Connector (OSTI)

Trunk-line break-down in teletransmission network interrupts some number of the routes of some different links. It makes necessary to restore, at least partially, failed transmission possibilities for each affect...

dr ing. Kornel Wydro

1988-01-01T23:59:59.000Z

97

Studies of electrical breakdown processes across vacuum gaps between metallic electrodes  

Science Journals Connector (OSTI)

Abstract An experimental program to elucidate the physical causes of electrical breakdown across vacuum gaps, such as those that occur in charged particle accelerators, is discussed. Magnetic insulation is explored as a technique to differentiate between field emission of electrons and clump acceleration as possible causative mechanisms for the onset of breakdown. The results and limitations of an exploratory experiment are described, along with plans for a more comprehensive experimental and theoretical campaign.

L.R. Grisham; A. Von Halle; A.F. Carpe; Guy Rossi; K.R. Gilton; E.D. McBride; E.P. Gilson; A. Stepanov; T.N. Stevenson

2014-01-01T23:59:59.000Z

98

Factors contributing to the breakdown of sodium beta-alumina  

SciTech Connect

Clarification of the breakdown process occurring during charge transfer in sodium beta alumina solid electrolytes was derived from: (1) studying the effects of molten sodium contact at 350/sup 0/C on single crystal sodium beta alumina and polycrystalline sodium beta alumina; (2) determination of critical current density by monitoring acoustic emissions accompanying crack growth in sodium/sodium beta alumina/sodium cells subjected to linear current ramping at 1 mA cm/sup -2/ sec/sup -1/; (3) failure analysis conducted on cycled electrolytes, some from commercial sodium/sulfur cells, which had been subjected to up to 703 Ahr cm/sup -2/ of charge transfer. Gray coloration developing in beta aluminas in contact with molten sodium was found to be a consequence of formation, through reduction by sodium, of oxygen vacancies charge compensated by electrons. Electronic conductivity of the electrolyte increases as a result. No second phase formation was detected. Colored electrolytes from sodium/sulfur cells show evidence of a newly recognized degradation mechanism in which fracture occurs when sodium is reduced and deposited internally under pressure as metal in regions where an electronic conductivity gradient exists. Heating colored beta aluminas in air produces reoxidation and bleaching. Kinetics and other properties of the coloration and bleaching processes were determined. Critical current density was found to bear an inverse relation to average electrolyte grain size. Evidence was found in the cycled electrolytes for a slow crack growth mechanism and a progressive mode of degradation advancing from the sulfur electrode interface. Implications of the findings for the construction and operation of sodium/sulfur battery systems are discussed.

Buechele, A.C.

1982-05-01T23:59:59.000Z

99

Nuclear envelope breakdown induced by herpes simplex virus type 1 involves the activity of viral fusion proteins  

Science Journals Connector (OSTI)

Abstract Herpesvirus infection reorganizes components of the nuclear lamina usually without loss of integrity of the nuclear membranes. We report that wild-type HSV infection can cause dissolution of the nuclear envelope in transformed mouse embryonic fibroblasts that do not express torsinA. Nuclear envelope breakdown is accompanied by an eight-fold inhibition of virus replication. Breakdown of the membrane is much more limited during infection with viruses that lack the gB and gH genes, suggesting that breakdown involves factors that promote fusion at the nuclear membrane. Nuclear envelope breakdown is also inhibited during infection with virus that does not express UL34, but is enhanced when the US3 gene is deleted, suggesting that envelope breakdown may be enhanced by nuclear lamina disruption. Nuclear envelope breakdown cannot compensate for deletion of the UL34 gene suggesting that mixing of nuclear and cytoplasmic contents is insufficient to bypass loss of the normal nuclear egress pathway.

Martina Maric; Alison C. Haugo; William Dauer; David Johnson; Richard J. Roller

2014-01-01T23:59:59.000Z

100

The influence of tropical operating conditions on the AC and impulse breakdown strength in gas insulated substation (GIS):.  

E-Print Network (OSTI)

??The ambient conditions could influence the breakdown strength of gas insulated substation. It is important to check if this influence will put the GIS into… (more)

Sihombing, H.

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "breakdown structure cbs" 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

On-Line Sorting of Wood Treated with Chromated Copper Arsenate Using Laser-Induced Breakdown Spectroscopy  

Science Journals Connector (OSTI)

This paper details the design, implementation, and field evaluation of an online detector system using laser-induced breakdown spectroscopy (LIBS) for the analysis of copper...

Moskal, T M; Hahn, D W

2002-01-01T23:59:59.000Z

102

Pressure, temperature, and dissolved gas dependence of dielectric breakdown in water.  

Science Journals Connector (OSTI)

It has been shown experimentally that the optical breakdown strength of water is a pressure dependent quantity growing with increasing pressure. The dependence of the breakdown strength on temperature and dissolved gas concentration over a larger range of pressures will be observed. Using a custom fabricated pressure vessel and high?power Nd:YAG laser breakdown events will be generated and observed over a range of pressures from 0 to 25 kpsi. Observations of breakdown events will be made using a high?speed photodetector located behind the pressure vessel’s optical windows. Dissolved gas concentration will be controlled and varied using a custom water preparation system over a range from water’s vapor pressure (?20 torr) to atmospheric pressure.Temperature will be monitored using a thermocouple attached to the pressure vessel and the temperature dependence will be measured over a range from 20 to 35 °C. A comparison between current single detector methods and previous imaging methods of using breakdown to determine absolute pressure will then be made. [Work supported by Impulse Devices Inc.

Jonathan Sukovich; R. Glynn Holt

2010-01-01T23:59:59.000Z

103

Experimental measurements of multiphoton enhanced air breakdown by a subthreshold intensity excimer laser  

SciTech Connect

This work presents density, spectroscopic temperature, and shockwave measurements of laser induced breakdown plasma in atmospheric air by subthreshold intensity (5.5x10{sup 9} W/cm{sup 2}) 193 nm laser radiation. Using molecular spectroscopy and two-wavelength interferometry, it is shown that substantial ionization (>10{sup 16} cm{sup -3}) occurs that is not predicted by collisional cascade (CC) breakdown theory. While the focused laser irradiance is three orders of magnitude below the theoretical collisional breakdown threshold, the substantial photon energy at 193 nm (6.42 eV/photon) compared with the ionization potential of air (15.6 eV) significantly increases the probability of multiphoton ionization effects. By spectroscopically monitoring the intensity of the N{sub 2}{sup +} first negative system (B {sup 2}SIGMA{sub u}{sup +}-X {sup 2}SIGMA{sub g}{sup +}) vibrational bandhead (v{sup '}=0,v{sup ''}=0) at low pressure (20 Torr) where multiphoton effects are dominant, it is shown that two photon excitation, resonant enhanced multiphoton ionization is the primary mechanism for quantized ionization of N{sub 2} to the N{sub 2}{sup +}(B {sup 2}SIGMA{sub u}{sup +}) state. This multiphoton effect then serves to amplify the collisional breakdown process at higher pressures by electron seeding, thereby reducing the threshold intensity from that required via CC processes for breakdown and producing high density laser formed plasmas.

Way, Jesse; Hummelt, Jason; Scharer, John [Department of Electrical and Computer Engineering, University of Wisconsin, Madison, Wisconsin 53706 (United States)

2009-10-15T23:59:59.000Z

104

Vlgerliste Rapport: cbs_vaelgere_valg  

E-Print Network (OSTI)

Repræsentationsområde Business and Social Sciences Business and Social Sciences Business and Social Sciences Business and Social Sciences Business and Social Sciences Business and Social Sciences Business and Social Sciences Business and Social Sciences Business and Social Sciences Business and Social Sciences Masterstuderende

105

Laser-Induced Breakdown Spectroscopy System Using a Passively Q-Switched Laser  

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

Laser-Induced Breakdown Spectroscopy System Laser-Induced Breakdown Spectroscopy System Using a Passively Q-Switched Laser Opportunity Research is active on the patent-pending technology, titled "Laser-Induced Breakdown Spectroscopy (LIBS) System Using a Passively Q-Switched Laser." This technology is available for licensing and/or further collaborative research from the U.S. Department of Energy's National Energy Technology Laboratory. Overview Atomic spectroscopy systems such as LIBS are used in many applications where the elemental composition of a solid, liquid or gas sample is desired. In addition, this detection technology has the advantage of providing composition data without sample destruction. In LIBS systems, precise timing and control between the laser and the spectrometer detector are

106

The effects of a jet on vortex breakdown over a sharp leading-edge delta wing  

E-Print Network (OSTI)

THE EFFECTS OF A JET ON VORTEX BREAKDOWN OVER A SHARP LEADING-EDGE DELTA WING A Thesis Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December 1985... Major Subject: Aerospace Engineering THE EFFECTS OF A JET ON VORTEX BREAKDOWN OVER A SHARP LEADING-EDGE DELTA WING A Thesis by IAN KENNETH MAYNARD Approved as to style and content by: Cyrus Ostowar (Chairman of Committee) Stan J Miley (M er...

Maynard, Ian Kenneth

2012-06-07T23:59:59.000Z

107

Biochemical evidence that starch breakdown by Bacteroides thetaiotaomicron involves outer membrane starch-binding sites and periplasmic starch-degrading enzymes.  

Science Journals Connector (OSTI)

...can utilize amylose, amylopectin, and pullulan...cell-associated amylase, amylopectinase...breakdown, alpha-glucosidase...can utilize amylose, amylopectin, and pullulan...cell-associated amylase, amylopectinase...breakdown, alpha-glucosidase...

K L Anderson; A A Salyers

1989-06-01T23:59:59.000Z

108

Biochemical evidence that starch breakdown by Bacteroides thetaiotaomicron involves outer membrane starch-binding sites and periplasmic starch-degrading enzymes.  

Science Journals Connector (OSTI)

...cell-associated amylase, amylopectinase...associated with starch breakdown, alpha-glucosidase...cell-associated amylase, amylopectinase...associated with starch breakdown, alpha-glucosidase...inducer of the starch- degrading...inducers or that break- down of maltose...

K L Anderson; A A Salyers

1989-06-01T23:59:59.000Z

109

EXPERIMENTAL STUDIES OF RF BREAKDOWNS IN THE COUPLER OF THE TTF RF GUN  

E-Print Network (OSTI)

EXPERIMENTAL STUDIES OF RF BREAKDOWNS IN THE COUPLER OF THE TTF RF GUN J.-P. Carneiro , S I, the RF gun of the TESLA Test Facility (TTF) has been operated with long RF pulses (up to 0.9 ms Fermilab has developed and delivered to DESY two RF guns for the operation of phase 1 of the TESLA Test

110

Experimental measurements of multiphoton enhanced air breakdown by a subthreshold intensity excimer laser  

E-Print Network (OSTI)

laser Jesse Way,a Jason Hummelt, and John Scharer Department of Electrical and Computer Engineering measurements of laser induced breakdown plasma in atmospheric air by subthreshold intensity 5.5 109 W/cm2 193 nm laser radiation. Using molecular spectroscopy and two-wavelength interferometry, it is shown

Scharer, John E.

111

The onset of optical breakdown in KrF-laser-irradiated silica glass surfaces  

E-Print Network (OSTI)

A synthetic fused silica obtained from Tosoh SGM Co., ESL-1000 (OH % 1200 wt. ppm), with a thick- ness of 2 mmThe onset of optical breakdown in KrF-laser-irradiated silica glass surfaces Y. Kawaguchia,* , A Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1

Dickinson, J. Thomas

112

Breakdown of 2mm symmetry in electron diffraction from multiwalled carbon nanotubes  

E-Print Network (OSTI)

Breakdown of 2mm symmetry in electron diffraction from multiwalled carbon nanotubes Zejian Liu of single-walled carbon nanotubes always have 2mm symmetry regardless if the nanotubes them- selves have such symmetry. We here show that, for the case of multiwalled carbon nanotubes, the 2mm symmetry can break down

Qin, Lu-Chang

113

Accurate Analytic Potential and Born-Oppenheimer Breakdown Functions for MgH and MgD from a Direct-Potential-Fit Data Analysis  

E-Print Network (OSTI)

Accurate Analytic Potential and Born-Oppenheimer Breakdown Functions for MgH and MgD from a Direct-potential-fit analysis to yield improved analytic potential energy and Born-Oppenheimer breakdown functions allowed us also to determine the adiabatic Born- Oppenheimer breakdown effects in this molecule

Le Roy, Robert J.

114

Effect of Bubbles on Liquid Nitrogen Breakdown in Plane-Plane Electrode Geometry From 100-250 kPa  

SciTech Connect

Liquid nitrogen (LN(2)) is used as the cryogen and dielectric for many high temperature superconducting, high voltage applications. When a quench in the superconductor occurs, bubbles are generated which can affect the dielectric breakdown properties of the LN(2). Experiments were performed using plane-plane electrode geometry where bubbles were introduced into the gap through a pinhole in the ground electrode. Bubbles were generated using one or more kapton heaters producing heater powers up to 30 W. Pressure was varied from 100-250 kPa. Breakdown strength was found to be relatively constant up to a given heater power and pressure at which the breakdown strength drops to a low value depending on the pressure. After the drop the breakdown strength continues to drop gradually at higher heater power. This is particularly illustrated at 100 kPa. After the drop in breakdown strength the breakdown is believed to be due to the formation of a vapor bridge. Also the heater power at which the breakdown strength changes from that of LN(2) to that of gaseous nitrogen increases with increasing pressure. The data can provide design constraints for high temperature superconducting fault current limiters (FCLs) so that the formation of a vapor bridge can be suppressed or avoided.

Sauers, Isidor [ORNL; James, David Randy [ORNL; Tuncer, Enis [ORNL; Polyzos, Georgios [ORNL; Pace, Marshall O [ORNL

2011-01-01T23:59:59.000Z

115

Towards a Work Breakdown Structure for Net Centric System of Systems Engineering and Management  

E-Print Network (OSTI)

As the system engineering industry sees an increasing focus on the lifecycle development, acquisition, and sustainment of net-centric Systems of Systems (SoS), organizations find that current processes and tools need to ...

Wang, Dr. Gan

2006-07-09T23:59:59.000Z

116

Evidence of Magnetic Breakdown on the Defects With Thermally Suppressed Critical Field in High Gradient SRF Cavities  

SciTech Connect

At SRF 2011 we presented the study of quenches in high gradient SRF cavities with dual mode excitation technique. The data differed from measurements done in 80's that indicated thermal breakdown nature of quenches in SRF cavities. In this contribution we present analysis of the data that indicates that our recent data for high gradient quenches is consistent with the magnetic breakdown on the defects with thermally suppressed critical field. From the parametric fits derived within the model we estimate the critical breakdown fields.

Eremeev, Grigory [JLAB; Palczewski, Ari [JLAB

2013-09-01T23:59:59.000Z

117

Water Power Forum | OpenEI Community  

Open Energy Info (EERE)

Water Power Forum Water Power Forum Home > Water Power Forum > Posts by term > Water Power Forum Content Group Activity By term Q & A Feeds Term: CBS Type Term Title Author Replies Last Post sort icon Document CBS MHK Cost Breakdown Structure Draft Kch 1 18 Apr 2013 - 13:33 Groups Menu You must login in order to post into this group. Recent content Hi Vanessa-I connected wit... 2013 projects and funding Comments on MHK Cost Reduction Pathway White Papers MHK LCOE Reporting Guidance Draft MHK Cost Breakdown Structure Draft more Group members (10) Managers: Graham7781 Recent members: Vanessa.gregory Alison.labonte Gdavis Jim mcveigh Ocop Thomas.heibel NickL Kch Rmckeel 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142234690

118

Structure  

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

Structure Structure functions 1 NOTE: THE FIGURES IN THIS SECTION ARE INTENDED TO SHOW THE REPRESENTATIVE DATA. THEY ARE NOT MEANT TO BE COMPLETE COMPILATIONS OF ALL THE WORLD'S RELIABLE DATA. Q 2 (GeV 2 ) F 2 (x,Q 2 ) * 2 i x H1 ZEUS BCDMS E665 NMC SLAC 10 -3 10 -2 10 -1 1 10 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 10 -1 1 10 10 2 10 3 10 4 10 5 10 6 Figure 16.6: The proton structure function F p 2 measured in electromagnetic scattering of positrons on protons (collider experiments ZEUS and H1), in the kinematic domain of the HERA data, for x > 0.00006 (cf. Fig. 16.9 for data at smaller x and Q 2 ), and for electrons (SLAC) and muons (BCDMS, E665, NMC) on a fixed target. Statistical and systematic errors added in quadrature are shown. The data are plotted as a function of Q 2 in bins of fixed x. Some points have been slightly offset in Q 2 for clarity. The ZEUS binning in x is used in this plot; all other data are rebinned to the x values of

119

Millimeter wave scattering and diffraction in 110 GHz air breakdown plasma  

SciTech Connect

We present measurements of the scattering, reflection, absorption, and transmission of a 1.5 MW, 110 GHz quasioptical gyrotron beam by a self-induced air breakdown plasma. The breakdown forms a periodic array of plasma filaments, oriented parallel to the incident electric field polarization that propagates toward the microwave source. For incident intensity of 3 MW/cm{sup 2}, calorimetric measurements show that as much as 45% of the full beam power is absorbed by the plasma, averaged over the pulse, 1% is reflected backward, and the remainder is transmitted and also scattered into a wide angular spread. We observe that approximately 10 times more power is scattered in the direction perpendicular to the filaments than parallel. The far-field angular distribution of transmitted power exhibits a diffraction pattern that changes throughout the 2-{mu}s life of the plasma.

Cook, Alan M.; Hummelt, Jason S.; Shapiro, Michael A.; Temkin, Richard J. [Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2013-04-15T23:59:59.000Z

120

An approach to predict tarmat breakdown in Minagish Reservoir in Kuwait  

SciTech Connect

Minagish Oolite reservoir, Minagish Field in Kuwait is characterized by tarmat presence at the oil-water contact. A water flooding project is planned for the reservoir. This paper discusses the possibility of tarmat break-down upon water injection below it. It was found that differential pressure at tarmat would be mainly due to water injection and that differential pressure due to oil production would be negligible. This paper suggests a technique to predict tarmat break-down time, response time at the nearest producer or observation well and the time at which water injection should be switched from below tarmat to above it. Also, the technique could be used to predict the differential pressure at tarmat anywhere in the reservoir.

Osman, M.E.

1983-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "breakdown structure cbs" 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

Investigation Of Breakdown Induced Surface Damage On 805 Mhz Pillbox Cavity Interior Surfaces  

E-Print Network (OSTI)

The MuCool Test Area (MTA) at Fermilab is a facility to develop the technology required for ionization cooling for a future Muon Collider and/or Neutrino Factory. As part of this research program, we have tested two 805 MHz vacuum RF cavities in a multi-Tesla magnetic field to study the effects of the static magnetic field on the cavity operation. This study gives useful information on field emitters in the cavity, dark current, surface conditioning, breakdown mechanisms and material properties of the cavity. All these factors determine the maximum accelerating gradient in the cavity. This paper discusses the image processing technique for quantitative estimation of spark damage spot distribution on cavity interior surfaces. The distribution is compared with the electric field distribution predicted by a computer code calculation. The local spark density is proportional to probability of surface breakdown and shows a power law dependence on the maximum electric field (E). This E dependence is consistent with ...

Jana, M R; Leonova, M; Moretti, A; Tollestrup, A; Yonehara, K; Freemire, B; Torun, Y; Bowring, D; Flanagan, G

2014-01-01T23:59:59.000Z

122

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

Science Journals Connector (OSTI)

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

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

2009-01-02T23:59:59.000Z

123

Effects of syngas composition on combustion induced vortex breakdown (CIVB) flashback in a swirl stabilized combustor  

Science Journals Connector (OSTI)

Flame flashback attributed to combustion induced vortex breakdown (CIVB) is a major design challenge for swirl stabilized burner combustors. This paper presents an experimental investigation of combustion induced vortex breakdown (CIVB) flashback propensity for flames yielded from Hydrogen (H2)–Carbon Monoxide (CO) fuel blends and actual synthesized gas (syngas) mixtures. A two-fold experimental approach, consisting of a high definition digital imaging system and a high speed PIV system, was employed. The main emphasis was on the effect of concentration of different constituents in fuel mixtures on flashback limit. In addition, the effect of Swirl Number on flashback propensity was discussed. The percentage of H2 in fuel mixtures played the dominant role when CIVB flashback occurred. For a given air mass flow rate, the mixture containing a higher percentage of H2 underwent flashback at much leaner conditions. Flashback maps for actual syngas fuel compositions showed a distinct behavior when various concentrations of diluents were introduced in the mixture. For the two major diluents tested, carbon dioxide (CO2) and nitrogen dioxide (NO2), CO2 was more dominant. The effect of Swirl Number on the flashback propensity was also tested and showed a decrease with an increase in Swirl Number. The final portion of this paper also provides an analysis of flow field of reacting flames which revealed complex vortex–chemistry interactions leading to vortex breakdown and flashback. Based on the experimental results a parametric model similar to Peclet Number approach was developed employing a flame quenching concept. A value of the quench parameter, Cquench was obtained from the correlation of flow Peclet Number and flame Peclet Number, which was observed to be dominated by the fuel composition rather than Swirl Number.

Bidhan Dam; Gilberto Corona; Mir Hayder; Ahsan Choudhuri

2011-01-01T23:59:59.000Z

124

Dielectric breakdown properties of hot SF{sub 6}/He mixtures predicted from basic data  

SciTech Connect

Sulfur hexafluoride (SF{sub 6}) gas has a quite high global warming potential and hence it is required that applying any substitute for SF{sub 6} gas. Much interest in the use of a mixture of helium and SF{sub 6} as arc quenching medium was investigated indicating a higher recovery performance of arc interruption than that of pure SF{sub 6}. It is known that the electrical breakdown in a circuit breaker after arc interruption occurs in a hot gas environment, with a complicated species composition because of the occurrence of dissociation and other reactions. The likelihood of breakdown relies on the electron interactions with all these species. The critical reduced electric field strength (the field at which breakdown can occur, relative to the number density) of hot SF{sub 6}/He mixtures related to the dielectric recovery phase of a high voltage circuit breaker is calculated in the temperature range from 300 K to 3500 K. The critically reduced electric field strength of these mixtures was obtained by balancing electron generation and loss mechanisms. These were evaluated using the electron energy distribution function derived from the Boltzmann transport equation under the two-term approximation. Good agreement was found between calculations for pure hot SF{sub 6} and pure hot He and experimental results and previous calculations. The addition of He to SF{sub 6} was found to decrease the critical reduced electric field strength in the whole temperature range due to a lack of electron impact attachment process for helium regardless its high ionization potential. This indicates that not the behaviour of dielectric strength but possibly the higher energy dissipation capability caused mainly by light mass and high specific heat as well as thermal conductivity of atomic helium contributes most to a higher dielectric recovery performance of arc interruption for SF{sub 6}/He mixtures.

Wang, Weizong [Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094 (China) [Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094 (China); State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an Shaanxi 710049 (China); Tu, Xin; Mei, Danhua [Department of Electrical Engineering and Electronics, The University of Liverpool, Brownlow Hill, Liverpool L69 3GJ (United Kingdom)] [Department of Electrical Engineering and Electronics, The University of Liverpool, Brownlow Hill, Liverpool L69 3GJ (United Kingdom); Rong, Mingzhe [State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an Shaanxi 710049 (China)] [State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an Shaanxi 710049 (China)

2013-11-15T23:59:59.000Z

125

Laser-Induced Breakdown Spectroscopy (LIBS) Analysis of Calcium Ions Dissolved in Water Using Filter Paper Substrates: An Ideal Internal Standard for Precision Improvement  

Science Journals Connector (OSTI)

We report an approach for selecting an internal standard to improve the precision of laser-induced breakdown spectroscopy (LIBS) analysis for determining calcium (Ca) concentration in...

Choi, Daewoong; Gong, Yongdeuk; Nam, Sang-Ho; Han, Song-Hee; Yoo, Jonghyun; Lee, Yonghoon

2014-01-01T23:59:59.000Z

126

INVESTIGATION OF BREAKDOWN INDUCED SURFACE DAMAGE ON 805 MHZ PILLBOX CAVITY INTERIOR SURFACES  

SciTech Connect

The MuCool Test Area (MTA) at Fermilab is a facility to develop the technology required for ionization cooling for a future Muon Collider and/or Neutrino Factory. As part of this research program, we have tested two 805 MHz vacuum RF cavities in a multi-Tesla magnetic field to study the effects of the static magnetic field on the cavity operation. This study gives useful information on field emitters in the cavity, dark current, surface conditioning, breakdown mechanisms and material properties of the cavity. All these factors determine the maximum accelerating gradient in the cavity. This paper discusses the image processing technique for quantitative estimation of spark damage spot distribution on cavity interior surfaces. The distribution is compared with the electric field distribution predicted by a computer code calculation. The local spark density is proportional to probability of surface breakdown and shows a power law dependence on the maximum electric field (E). This E dependence is consistent with the dark current calculated from the Fowler-Nordheim equation.

Jana, M.R.; Chung, M.; Leonova, M.; Moretti, A.; Tollestrup,A.; Yonehara, K.; Freemire, B.; Torun, Y.; Bowring, D.; Flanagan, G.

2013-09-25T23:59:59.000Z

127

Effect of high solenoidal magnetic fields on breakdown voltages of high vacuum 805 MHz cavities  

SciTech Connect

There is an on going international collaboration studying the feasibility and cost of building a muon collider or neutrino factory [1,2]. An important aspect of this study is the full understanding of ionization cooling of muons by many orders of magnitude for the collider case. An important muon ionization cooling experiment, MICE [3], has been proposed to demonstrate and validate the technology that could be used for cooling. Ionization cooling is accomplished by passing a high-emittance muon beam alternately through regions of low Z material, such as liquid hydrogen, and very high accelerating RF Cavities within a multi-Tesla solenoidal field. To determine the effect of very large solenoidal magnetic fields on the generation of dark current, x-rays and on the breakdown voltage gradients of vacuum RF cavities, a test facility has been established at Fermilab in Lab G. This facility consists of a 12 MW 805 MHz RF station and a large warm bore 5 T solenoidal superconducting magnet containing a pill box type cavity with thin removable window apertures. This system allows dark current and breakdown studies of different window configurations and materials. The results of this study will be presented. The study has shown that the peak achievable accelerating gradient is reduced by a factor greater than 2 when solenoidal field of greater than 2 T are applied to the cavity.

Moretti, A.; Bross, A.; Geer, S.; Qian, Z.; /Fermilab; Norem, J.; /Argonne; Li, D.; Zisman, M.; /LBL, Berkeley; Torun, Y.; /IIT, Chicago; Rimmer, R.; /Jefferson Lab; Errede,; /Illinois U., Urbana

2005-10-01T23:59:59.000Z

128

A Beale-Kato-Majda breakdown criterion for an Oldroyd-B fluid in the creeping flow regime  

E-Print Network (OSTI)

We derive a criterion for the breakdown of solutions to the Oldroyd-B model in $\\R^3$ in the limit of zero Reynolds number (creeping flow). If the initial stress field is in the Sobolev space $H^m$, $m> 5/2$, then either a unique solution exists within this space indefinitely, or, at the time where the solution breaks down, the time integral of the $L^\\infty$-norm of the stress tensor must diverge. This result is analogous to the celebrated Beale-Kato-Majda breakdown criterion for the inviscid Eluer equations of incompressible fluids.

Raz Kupferman; Claude Mangoubi; Edriss S. Titi

2007-09-10T23:59:59.000Z

129

Spectroscopic temperature measurements of air breakdown plasma using a 110 GHz megawatt gyrotron beam  

SciTech Connect

Temperature measurements are presented of a non-equilibrium air breakdown plasma using optical emission spectroscopy. A plasma is created with a focused 110 GHz 3 {mu}s pulse gyrotron beam in air that produces power fluxes exceeding 1 MW/cm{sup 2}. Rotational and vibrational temperatures are spectroscopically measured over a pressure range of 1-100 Torr as the gyrotron power is varied above threshold. The temperature dependence on microwave field as well as pressure is examined. Rotational temperature measurements of the plasma reveal gas temperatures in the range of 300-500 K and vibrational temperatures in the range of 4200-6200 K. The vibrational and rotational temperatures increase slowly with increasing applied microwave field over the range of microwave fields investigated.

Hummelt, J. S.; Shapiro, M. A.; Temkin, R. J. [Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2012-12-15T23:59:59.000Z

130

Grain-scale thermoelastic stresses and spatiotemporal temperature gradients on airless bodies, implications for rock breakdown  

E-Print Network (OSTI)

Thermomechanical processes such as fatigue and shock have been suggested to cause and contribute to rock breakdown on Earth, and on other planetary bodies, particularly airless bodies in the inner solar system. In this study, we modeled grain-scale stresses induced by diurnal temperature variations on simple microstructures made of pyroxene and plagioclase on various solar system bodies. We found that a heterogeneous microstructure on the Moon experiences peak tensile stresses on the order of 100 MPa. The stresses induced are controlled by the coefficient of thermal expansion and Young's modulus of the mineral constituents, and the average stress within the microstructure is determined by relative volume of each mineral. Amplification of stresses occurs at surface-parallel boundaries between adjacent mineral grains and at the tips of pore spaces. We also found that microscopic spatial and temporal surface temperature gradients do not correlate with high stresses, making them inappropriate proxies for investig...

Molaro, Jamie L; Langer, Steve A

2015-01-01T23:59:59.000Z

131

Representing Born–Oppenheimer breakdown radial correction functions for diatomic molecules  

Science Journals Connector (OSTI)

The empirical determination of Born–Oppenheimer breakdown (BOB) correction functions from the analysis of high resolution diatomic molecule spectra is becoming increasingly common. However, in virtually all applications to date, the analytic expressions used to represent those functions have unphysical limiting behaviour which makes the resulting overall potential energy functions unusable at long-range. This paper delineates the limiting physical constraints, which should be imposed on the form of such BOB correction functions, and presents flexible new expressions incorporating those constraints. The utility of these new forms is illustrated by a re-analysis of recent high resolution IR data for the ground electronic state of AgH, which yields an updated potential energy function and more meaningful adiabatic (potential) and non-adiabatic (centrifugal) BOB correction functions for this system. Further examination of this AgH system also illustrates the problem of model dependence associated with efforts to determine physically unique potential energy and centrifugal BOB correction functions.

Robert J. Le Roy; Yiye Huang

2002-01-01T23:59:59.000Z

132

Method of Controlling Corona Effects and Breakdown Voltage of Small Air Gaps Stressed by Impulse Voltages  

E-Print Network (OSTI)

This paper investigates the influence of a resistor on the dielectric behavior of an air gap. The resistor is connected in series with the air gap and the latter is stressed by impulse voltage. Air gap arrangements of different geometry with either the rod or the plate grounded are stressed with impulse voltages of both positive and negative polarity. The resistor is connected in series with the air gap in the return circuit connecting the gap with the impulse generator. The method followed involves the investigation of the graphs of the charging time concerning the air gaps capacitances, in connection to the value of the resistor, the geometry of the gap, the effect of grounding and the polarity effect. It is determined that the charging time of the air gap increases, as the value of the resistor increases. It is also determined that the peak voltage value of the fully charged air gap decreases as the value of the resistor increases. The results of the mathematical and simulation analysis are compared with the results of the oscillograms taken from experimental work. In addition and consequently to the above results it is concluded from the experimental work that the in series connection of the resistor in the circuit has significant influence on corona pulses (partial discharges) occurring in the gap and on the breakdown voltage of the gap. A new method of controlling the corona effects and consequently the breakdown voltage of small air gaps stressed by impulse voltage of short duration in connection to the ground effect and the polarity effect has arisen. Furthermore through mathematical analysis of the charging graphs obtained from simulation and experimental oscillograms there was a calculation of the values of the capacitance of the air gaps in relation to their geometry and the results were compared to the values calculated with mathematical analysis.

Athanasios Maglaras; Trifon Kousiouris; Frangiskos Topalis; Dimitrios Katsaros; Leandros A. Maglaras; Konstantina Giannakopoulou

2014-10-15T23:59:59.000Z

133

IONIZATION IN ATMOSPHERES OF BROWN DWARFS AND EXTRASOLAR PLANETS. III. BREAKDOWN CONDITIONS FOR MINERAL CLOUDS  

SciTech Connect

Electric discharges were detected directly in the cloudy atmospheres of Earth, Jupiter, and Saturn, are debatable for Venus, and indirectly inferred for Neptune and Uranus in our solar system. Sprites (and other types of transient luminous events) have been detected only on Earth, and are theoretically predicted for Jupiter, Saturn, and Venus. Cloud formation is a common phenomenon in ultra-cool atmospheres such as in brown dwarf and extrasolar planetary atmospheres. Cloud particles can be expected to carry considerable charges which may trigger discharge events via small-scale processes between individual cloud particles (intra-cloud discharges) or large-scale processes between clouds (inter-cloud discharges). We investigate electrostatic breakdown characteristics, like critical field strengths and critical charge densities per surface, to demonstrate under which conditions mineral clouds undergo electric discharge events which may trigger or be responsible for sporadic X-ray emission. We apply results from our kinetic dust cloud formation model that is part of the DRIFT-PHOENIX model atmosphere simulations. We present a first investigation of the dependence of the breakdown conditions in brown dwarf and giant gas exoplanets on the local gas-phase chemistry, the effective temperature, and primordial gas-phase metallicity. Our results suggest that different intra-cloud discharge processes dominate at different heights inside mineral clouds: local coronal (point discharges) and small-scale sparks at the bottom region of the cloud where the gas density is high, and flow discharges and large-scale sparks near, and maybe above, the cloud top. The comparison of the thermal degree of ionization and the number density of cloud particles allows us to suggest the efficiency with which discharges will occur in planetary atmospheres.

Helling, Ch.; Jardine, M.; Stark, C. [SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS (United Kingdom); Diver, D., E-mail: ch@leap2010.eu [SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ (United Kingdom)

2013-04-20T23:59:59.000Z

134

518 IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL. 33, NO. 2, APRIL 2005 Plasma Dynamics During Breakdown in  

E-Print Network (OSTI)

, lamp, modeling, plasma. METAL halide arc lamps are widely used sources of in- door and large area plasma hydrodynamics model was used to investigate breakdown in metal halide lamp. Images depicting518 IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL. 33, NO. 2, APRIL 2005 Plasma Dynamics During

Kushner, Mark

135

Towards a better understanding of dielectric barrier discharges in ferroelectrets: Paschen breakdown fields in micrometer sized voids  

SciTech Connect

Charged cellular polypropylene foams (i.e., ferro- or piezoelectrets) demonstrate high piezoelectric activity upon being electrically charged. When an external electric field is applied, dielectric barrier discharges (DBDs) occur, resulting in a separation of charges which are subsequently deposited on dielectric surfaces of internal micrometer sized voids. This deposited space charge is responsible for the piezoelectric activity of the material. Previous studies have indicated charging fields larger than predicted by Townsend's model of Paschen breakdown applied to a multilayered electromechanical model; a discrepancy which prompted the present study. The actual breakdown fields for micrometer sized voids were determined by constructing single cell voids using polypropylene spacers with heights ranging from 8 to 75??m, “sandwiched” between two polypropylene dielectric barriers and glass slides with semi-transparent electrodes. Subsequently, a bipolar triangular charging waveform with a peak voltage of 6?kV was applied to the samples. The breakdown fields were determined by monitoring the emission of light due to the onset of DBDs using an electron multiplying CCD camera. The breakdown fields at absolute pressures from 101 to 251?kPa were found to be in good agreement with the standard Paschen curves. Additionally, the magnitude of the light emission was found to scale linearly with the amount of gas, i.e., the height of the voids. Emissions were homogeneous over the observed regions of the voids for voids with heights of 25??m or less and increasingly inhomogeneous for void heights greater than 40??m at high electric fields.

Harris, Scott, E-mail: harri4s@cmich.edu [Department of Physics and Science of Advanced Materials Program, Central Michigan University, Mount Pleasant, Michigan 48859 (United States); Applied Condensed-Matter Physics, Department of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam-Golm (Germany); Mellinger, Axel, E-mail: axel.mellinger@cmich.edu [Department of Physics and Science of Advanced Materials Program, Central Michigan University, Mount Pleasant, Michigan 48859 (United States)

2014-04-28T23:59:59.000Z

136

Dead-Space Theory Predictions of Excess-Noise Factor, Breakdown Voltage, and Frequency Response for Thin Avalanche Photodiodes  

E-Print Network (OSTI)

for Thin Avalanche Photodiodes Majeed M. Hayat°", Mohammad A. Sa1eh', Ohhyun Kwonc, Bahaa E. A. Sale width. Keywords: Avalanche photodiode, dead space, impact ionization, excess noise factor, avalanche breakdown down, frequency response. 1 Introduction It is well known that for avalanche photodiodes (APDs

Teich, Malvin C.

137

High Breakdown ( > \\hbox {1500 V} ) AlGaN/GaN HEMTs by Substrate-Transfer Technology  

E-Print Network (OSTI)

In this letter, we present a new technology to increase the breakdown voltage of AlGaN/GaN high-electron-mobility transistors (HEMTs) grown on Si substrates. This new technology is based on the removal of the original Si ...

Lu, Bin

138

Excitational energy transfer enhancing ionization and spatial-temporal evolution of air breakdown with UV laser radiation  

E-Print Network (OSTI)

with UV laser radiation Jason S. Hummelta and John E. Scharer Department of Electrical and Computer of oxygen has on the ionization of nitrogen in laser air breakdown. Plasma is created by focusing a 193 nm ArF excimer laser using an 18 cm focal length lens, producing a cylindrical 540 m wide spot

Scharer, John E.

139

Detection-estimation of very close emitters: performance breakdown, ambiguity, and general statistical analysis of maximum-likelihood estimation  

Science Journals Connector (OSTI)

We reexamine the well-known problem of "threshold behavior" or "performance breakdown" in the detection-estimation of very closely spaced emitters. In this extreme regime, we analyze the performance for maximum-likelihood estimation (MLE) of directions-of-arrival ... Keywords: direction-of-arrival (DOA) estimation, maximum-likelihood estimation, random matrix theory, signal detection, signal resolution

Yuri I. Abramovich; Ben A. Johnson

2010-07-01T23:59:59.000Z

140

The role of boundary conditions in a simple model of incipient vortex breakdown F. Gallaire and J.-M. Chomaz  

E-Print Network (OSTI)

. In the labora- tory, it is preferentially studied in vortex tubes, where it is seen in many cases to give riseThe role of boundary conditions in a simple model of incipient vortex breakdown F. Gallaire and J of a hairpin vortex in a shear-thinning fluid governed by a power-law model Phys. Fluids 25, 101703 (2013); 10

Boyer, Edmond

Note: This page contains sample records for the topic "breakdown structure cbs" 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

NANOCOMPOSITE BASED STRUCTURAL HEALTH MONITORING APPROACHES FOR FIBRE REINFORCED POLYMERS  

E-Print Network (OSTI)

non-destructive testing (NDT) after production as well as for maintenance and repair reasons is still energy sector. Both branches have large structural parts and, furthermore, their demand for maximal damage or avoidance of catastrophic breakdown, economic demands require optimised down-times and long

Boyer, Edmond

142

Design of RF Feed System for Standing-Wave Accelerator Structures  

SciTech Connect

We are investigating a standing wave structure with an rf feed to each individual cell. This approach minimizes rf power flow and electromagnetic energy absorbed by an rf breakdown. The objective of this work is a robust high-gradient (above 100 MV/m) X-band accelerator structure.

Neilson, Jeffrey; Tantawi, Sami; Dolgashev, Valery [SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025 (United States)

2010-11-04T23:59:59.000Z

143

Total Carbon Measurement in Soils Using Laser-Induced Breakdown Spectroscopy: Results from the Field and Implications for Carbon Sequestration  

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

Total Carbon Measurement in Soils using Laser-Induced Breakdown Total Carbon Measurement in Soils using Laser-Induced Breakdown Spectroscopy: Results from the Field and Implications for Carbon Sequestration Michael H. Ebinger (mhe@lanl.gov, 505-667-3147) Environmental Dynamics and Spatial Analysis Group (EES-10), MS J495 Earth and Environmental Sciences Division Los Alamos National Laboratory, Los Alamos, NM 87545, USA. David A. Cremers (cremers_david@lanl.gov, 505-665-4180) Advanced Chemical Diagnostics and Instrumentation Group, MS J565 Chemistry Division Los Alamos National Laboratory, Los Alamos, NM 87545 David D. Breshears (daveb@lanl.gov, 505-665-2803) Environmental Dynamics and Spatial Analysis Group (EES-10), MS J495 Earth and Environmental Sciences Division Los Alamos National Laboratory, Los Alamos, NM 87545, USA.

144

An investigation into the cumulative breakdown process of polymethylmethacrylate in quasi-uniform electric field under nanosecond pulses  

SciTech Connect

A group of complete images on the discharge channel developed in PMMA in quasi-uniform electric field under nanosecond pulses are observed with an on-line transmission microscope. The characteristics of the cumulative breakdown process are also generalized, which include initiating from the vicinity of the cathode, developing to the anode with a branch-like shape, and taking on a wormhole appearance when final breakdown occurs. The concluded characteristics are explained by referring to the conceptions of “low density domain” and “free radical” and considering the initial discharge channel as a virtual needle. The characteristics are helpful for designers to enhance the lifetime of insulators employed on a nanosecond time scale.

Zhao, Liang; Cang Su, Jian; Bo Zhang, Xi; Feng Pan, Ya; Min Wang, Li; Peng Fang, Jin; Sun, Xu; Lui, Rui [Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, P.O. Box 69 Branch 13, Xi'an 710024 (China)] [Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, P.O. Box 69 Branch 13, Xi'an 710024 (China)

2013-08-15T23:59:59.000Z

145

Breakdown of the Equivalence between Energy Content and Weight in a Weak Gravitational Field for a Quantum Body  

E-Print Network (OSTI)

It is shown that weight operator of a composite quantum body in a weak external gravitational field in the post-Newtonian approximation of the General Relativity does not commute with its energy operator, taken in the absence of the field. Nevertheless, the weak equivalence between the expectations values of weight and energy is shown to survive at a macroscopic level for stationary quantum states for the simplest composite quantum body - a hydrogen atom. Breakdown of the weak equivalence between weight and energy at a microscopic level for stationary quantum states can be experimentally detected by studying unusual electromagnetic radiation, emitted by the atoms, supported and moved in the Earth gravitational field with constant velocity, using spacecraft or satellite. For superpositions of stationary quantum states, a breakdown of the above mentioned equivalence at a macroscopic level leads to time dependent oscillations of the expectation values of weight, where the equivalence restores after averaging over time procedure.

Andrei Lebed

2012-05-14T23:59:59.000Z

146

Temperature effect on laser-induced breakdown spectroscopy spectra of molten and solid salts  

SciTech Connect

Laser-induced breakdown spectroscopy (LIBS) has been investigated as a potential analytical tool to improve operations and safeguards for electrorefiners, such as those used in processing spent nuclear fuel. This study set out to better understand the effect of sample temperature and physical state on LIBS spectra of molten and solid salts by building calibration curves of cerium and assessing self-absorption, plasma temperature, electron density, and local thermal equilibrium (LTE). Samples were composed of a LiCl–KCl eutectic salt, an internal standard of MnCl2, and varying concentrations of CeCl3 (0.1, 0.3, 0.5, 0.8, and 1.0 wt.% Ce) under different temperatures (773, 723, 673, 623, and 573 K). Analysis of salts in their molten form is preferred as plasma plumes from molten samples experienced less self-absorption, less variability in plasma temperature, and higher clearance of the minimum electron density required for local thermal equilibrium. These differences are attributed to plasma dynamics as a result of phase changes. Spectral reproducibility was also better in the molten state due to sample homogeneity.

Cynthia Hanson; Supathorn Phongikaroon; Jill R. Scott

2014-07-01T23:59:59.000Z

147

VERY LOW FREQUENCY BREAKDOWN PROPERTIES OF ELECTRICAL INSULATION MATERIALS AT CRYOGENIC TEMPERATURES  

SciTech Connect

For long cables or equipment with large capacitance it is not always possible to conduct high voltage withstand at tests at 60 Hz due to limitations in charging currents of the power supply. Very low frequency (typically at a frequency of 0.1 Hz) has been used for conventional cables as a way of getting around the charging current limitation. For superconducting grid applications the same issues apply. However there is very little data at cryogenic temperatures on how materials perform at low frequency compared to 60 Hz and whether higher voltages should be applied when performing a high voltage acceptability test. Various materials including G10 (fiberglass reinforced plastic or FRP), Cryoflex (a tape insulation used in some high temperature superconducting cables), kapton (commonly used polyimide), polycarbonate, and polyetherimide, and in liquid nitrogen alone have been tested using a step method for frequencies of 60 Hz, 0.1 Hz, and dc. The dwell time at each step was chosen so that the aging factor would be the same in both the 60 Hz and 0.1 Hz tests. The data indicated that, while there is a small frequency dependence for liquid nitrogen, there are significant differences for the solid materials studied. Breakdown data for these materials and for model cables will be shown and discussed.

Sauers, Isidor [ORNL; Tuncer, Enis [ORNL; Polyzos, Georgios [ORNL; James, David Randy [ORNL; Ellis, Alvin R [ORNL; Pace, Marshall O [ORNL

2010-01-01T23:59:59.000Z

148

High altitude atmospheric discharges according to the runaway air breakdown mechanism  

SciTech Connect

High altitude optical transients - red sprites, blue jets, and elves - are modeled in the context of the relativistic electron runaway air breakdown mechanism. These emissions are usually associated with large mesoscale convective systems (hereafter MCS). In thunderstorms cloud electrification proceeds over a time scale long enough to permit the conducting atmosphere above the cloud to polarize and short out the thunderstorm electric field. When a lightning strike rapidly neutralizes a cloud charge layer runaway driving fields can develop in the stratosphere and mesosphere. According to present simulations of the full runaway process the variety of observed optical emissions are due to the nature of the normal lightning event in the MCS that kick starts the runaway avalanche. In this paper the authors describe some details of the model, present the results of the evolution of the primary electron population, and summarize the initial conditions necessary for different types of discharges. Two companion papers present (a) the predicted optical, gamma ray, and radio emissions caused by these electrical discharges, and (b) the time evolution of the secondary electron population and its implications in terms of observables.

Symbalisty, E.; Roussel-Dupre, R.; Yukhimuk, V.; Taranenko, Y.

1997-04-01T23:59:59.000Z

149

Laboratory feasibility study of fusion vessel inner wall chemical analysis by Laser Induced Breakdown Spectroscopy  

Science Journals Connector (OSTI)

Laser Induced Breakdown Spectroscopy (LIBS) is nowadays a well established tool for qualitative, semi-quantitative and quantitative analyses of surfaces, with micro-destructive characteristics and capabilities for stratigraphy. LIBS is an appealing technique compared with many other types of elemental analysis thanks to the set up versatility facilitating non-invasive and remote analyses, as well as suitability to diagnostics in harsh environments. In this work, LIBS capabilities were used for the determination of the atomic composition of multilayered samples simulating the tiles of plasma facing components in the next generation fusion machines such as ITER. A new experimental setup was designed and realized in order to optimize the characteristics of an LIBS system working at low pressure and remotely, as it should be for an in situ system to be applied in monitoring the erosion and redeposition phenomena occurring on the inner walls of a fusion device. The effects of time delay and laser fluence on LIBS sensitivity at reduced pressure were examined, looking for operational conditions suitable to analytical applications. The quantitative analysis of some atomic species in the superficial layer has been carried out using a Calibration Free (CF) approach in the time window where Local Thermal Equilibrium (LTE) was assumed for an LIBS analysis.

Salvatore Almaviva; Luisa Caneve; Francesco Colao; Roberta Fantoni; Giorgio Maddaluno

2012-01-01T23:59:59.000Z

150

Numerical studies of the high power microwave breakdown in gas using the fluid model with a modified electron energy distribution function  

SciTech Connect

A modified electron energy distribution function (EEDF) is introduced into the fluid model and its effects on the high power microwave (HPM) breakdown in air and argon are investigated. A proper numerical scheme for the finite-difference time-domain method is employed to solve the fluid model. Numerical simulations show that the HPM breakdown time in argon predicted by the fluid model with the modified EEDF agrees well with the results of Particle-in-cell-Monte Carlo collision simulations, while the Maxwellian EEDF results in faster HPM breakdown when the mean electron energy is less than 20 eV. We also confirm that the Maxwellian EEDF can be used in the fluid model for simulating the air breakdown at the low frequencies based on the reported experiments.

Zhao Pengcheng; Liao Cheng; Lin Chenbin; Chang Lei; Fu Haijun [Institute of Electromagnetics, Southwest Jiaotong University, Chengdu 610031 (China)

2011-10-15T23:59:59.000Z

151

Measurements of the volt-ampere characteristics and the breakdown voltages of direct-current helium and hydrogen discharges in microgaps  

SciTech Connect

The discharge phenomena for micro meter gap sizes include many interesting problems from engineering and physical perspectives. In this paper, the authors deal with the experimental and theoretical results of the breakdown voltage and current-voltage characteristics of the direct-current helium and hydrogen discharges. The measurements were performed at a constant pressure of around one atmosphere, while varying the gap size between two parallel plane tungsten electrodes between 1??m and 100??m. From the measured breakdown voltage curves, the effective yields and the ionization coefficients were derived for both gases. Present data for the ionization coefficients correlate with the data obtained for the breakdown voltage curves measured for fixed 100??m interelectrode separation. The current-voltage characteristics were plotted for the various gap sizes illustrating the role of the field emission effects in the microgaps. Based on the Fowler-Nordheim theory, the enhancement factors were determined. The gap spacing dependence of the field emission current can be explained by the introduction of two ideas, the first being a space charge effect by emitted electrons, and the second a change in the breakdown mechanism. Experimental results, presented here, demonstrate that Townsend phenomenology breaks down when field emission becomes the key mechanism affecting the breakdown and deforming the left hand side of the breakdown voltage curves.

Klas, M.; Matej?ik, Š. [Department of Experimental Physics, Comenius University, Mlynskadolina F2, 84248 Bratislava (Slovakia); Radjenovi?, B.; Radmilovi?-Radjenovi?, M. [Institute of Physics, University of Belgrade, P.O. Box 57, 11080 Belgrade (Serbia)

2014-10-15T23:59:59.000Z

152

ChemCam on MSL 2009: first laser induced breakdown spectrometer for space science  

SciTech Connect

ChemCam is one of the 10 instrument suites on the Mars Science Laboratory, a martian rover being built by Jet Propulsion Laboratory, for the next NASA mission to Mars (MSL 2009). ChemCam is an instrument package consisting of two remote sensing instruments: a Laser-Induced Breakdown Spectrometer (LIBS) and a Remote Micro-Imager (RMI). LIBS provides elemental compositions of rocks and soils, while the RMI places the LIBS analyses in their geomorphologic context. Both instruments rely on an autofocus capability to precisely focus on the chosen target, located at distances from the rover comprised between 1 and 9 m for LIBS, and 2 m and infinity for RMI. ChemCam will help determine which samples, within the vicinity of the MSL rover, are of sufficient interest to use the contact and in-situ instruments for further characterization. It will provide valuable analyses of samples that are inaccessible to contact and in-situ instruments, and of a much larger number of samples than can be done with this kind of instrument. ChemCam also has a capability to provide passive spectroscopy data of rocks and soils on Mars. ChemCam hardware consists of a Mast Unit (MU), provided by France, and a Body Unit (BU) built and tested in the USA. The Flight Model of the MU is assembled, tested and now available in the USA, while the BU is currently being assembled and tested. Both will be connected by the end of year '08 for end-to-end functional and performance tests, before delivery to JPL and assembly on the MSL rover. Launch is scheduled for October 09. After describing the concept of ChemCam, this presentation focuses on its French part, Mast Unit. The results presented show that Mast Unit is able to generate a plasma and collect its light, over the full applicable ranges of distances and temperatures on Mars.

Wiens, Roger C [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

153

UTC Power/Delphi SECA CBS Final Report  

SciTech Connect

The subject report summarizes the results of solid oxide fuel cell development conducted by UTC Power in conjunction with Delphi Automotive Systems under a cost-share program with from October 2008 through March of 2013. Over that period Delphi Automotive Systems developed a nearly four times larger area solid oxide fuel cell stack capable of operating on pre-reformed natural gas and simulated coal gas with durability demonstrated to 5,000 hours and projected to exceed 10,000 hours. The new stack design was scaled to 40-cell stacks with power output in excess of 6.25kW. Delphi also made significant strides in improving the manufacturability, yield and production cost of these solid oxide fuel cells over the course of the program. Concurrently, UTC Power developed a conceptual design for a 120 MW Integrated Gasification Fuel Cell (IGFC) operating on coal syngas with as high as 57% Higher Heating Value (HHV) efficiency as a measure of the feasibility of the technology. Subsequently a 400 kW on-site system preliminary design with 55% Lower Heating Value (LHV) efficiency operating on natural gas was down-selected from eighteen candidate designs. That design was used as the basis for a 25kW breadboard power plant incorporating four Delphi cell stacks that was tested on natural gas before the program was discontinued due to the sale of UTC Power in early 2013. Though the program was cut short of the endurance target of 3,000 hours, many aspects of the technology were proven including: large-area, repeatable cell manufacture, cell stack operation on simulated coal gas and natural gas and integrated power plant operation on natural gas. The potential of the technology for high efficiency stationary electric power generation is clear. Acceptable production costs, durability, and reliability in real world environments are the remaining challenges to commercialization.

Gorman, Michael; Kerr, Rich

2013-04-04T23:59:59.000Z

154

Identification of vapor-phase chemical warfare agent simulants and rocket fuels using laser-induced breakdown spectroscopy  

SciTech Connect

Application of laser-induced breakdown spectroscopy (LIBS) to the identification of security threats is a growing area of research. This work presents LIBS spectra of vapor-phase chemical warfare agent simulants and typical rocket fuels. A large dataset of spectra was acquired using a variety of gas mixtures and background pressures and processed using partial least squares analysis. The five compounds studied were identified with a 99% success rate by the best method. The temporal behavior of the emission lines as a function of chamber pressure and gas mixture was also investigated, revealing some interesting trends that merit further study.

Stearns, Jaime A.; McElman, Sarah E.; Dodd, James A.

2010-05-01T23:59:59.000Z

155

Transient phenomena in the dielectric breakdown of HfO{sub 2} optical films probed by ultrafast laser pulse pairs  

SciTech Connect

The laser induced breakdown threshold of HfO{sub 2} films is studied with single pairs of pulses of variable delay and 50 fs and 1 ps pulse duration. Two distinct transient regimes are observed that can be related to the relaxation of the electron density from the conduction band via an intermediate state to the valence band. The experimental results are in good agreement with a theoretical model that assumes occupation of mid gap states after the first pulse on a time scale of several tens of picoseconds and subsequent decay of this population via recombination with holes in the valence band on a time scale of several tens of milliseconds.

Nguyen, Duy N.; Emmert, Luke A.; Rudolph, Wolfgang [Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131 (United States); Patel, Dinesh; Menoni, Carmen S. [Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, Colorado 80523 (United States)

2010-11-08T23:59:59.000Z

156

Corrosion inhibitor storage and release property of TiO{sub 2} nanotube powder synthesized by rapid breakdown anodization method  

SciTech Connect

Graphical abstract: Display Omitted Highlights: ? TiO{sub 2} nanotube powders were synthesized by rapid breakdown anodization method. ? Benzotriazole was loaded into the TiO{sub 2} nanotube powders. ? Low pH induced release of benzotriazole from TiO{sub 2} nanotube powders was proved. -- Abstract: Titanium dioxide (TiO{sub 2}) is one of the most studied substances in material science due to its versatile properties and diverse applications. In this study titanium dioxide nanotube powder were synthesized by rapid breakdown anodization (RBA) method. The synthesis involved potentiostatic anodization of titanium foil in 0.1 M HClO{sub 4} electrolyte under an applied voltage of 20 V and rapid stirring. The morphology and the phase of titanium dioxide nanotube powder were studied using field emission scanning electron microscopy, laser Raman spectroscopy and high resolution transmission electron microscopy. Benzotriazole was chosen as model inhibitor to evaluate TiO{sub 2} nanotube powder's corrosion inhibitor loading and releasing properties. The storage and release properties of TiO{sub 2} nanotube powder were studied using UV–visible spectroscopy and thermogravimetric analysis.

Arunchandran, C.; Ramya, S.; George, R.P. [Corrosion Science and Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102 (India)] [Corrosion Science and Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102 (India); Kamachi Mudali, U., E-mail: kamachi@igcar.gov.in [Corrosion Science and Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102 (India)

2013-02-15T23:59:59.000Z

157

Rapid breakdown anodization technique for the synthesis of high aspect ratio and high surface area anatase TiO{sub 2} nanotube powders  

SciTech Connect

Clusters of high aspect ratio, high surface area anatase-TiO{sub 2} nanotubes with a typical nanotube outer diameter of about 18 nm, wall thickness of approximately 5 nm and length of 5-10 {mu}m were synthesized, in powder form, by breakdown anodization of Ti foils in 0.1 M perchloric acid, at 10 V (299 K) and 20 V ({approx}275 and 299 K). The surface area, morphology, structure and band gap were determined from Brunauer Emmet Teller method, field emmission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Raman, photoluminescence and diffuse reflectance spectroscopic studies. The tubular morphology and anatase phase were found to be stable up to 773 K and above 773 K anatase phase gradually transformed to rutile phase with disintegration of tubular morphology. At 973 K, complete transformation to rutile phase and disintegration of tubular morphology were observed. The band gap of the as prepared and the annealed samples varied from 3.07 to 2.95 eV with increase in annealing temperature as inferred from photoluminescence and diffuse reflectance studies. -- Graphical abstract: Display Omitted Research highlights: {yields} High aspect ratio anatase-titania nanotube powders were synthesized electrochemically. {yields} The surface area of the nanotubes were much higher than those reported. {yields} The annealing temperature limit for maintaining tubular morphology was established. {yields} The photoluminiscence spectroscopy reflected the presence of defects, annealing of defects and phase transformation. {yields} The nanotubes were of {approx}5 nm wall thickness as revealed by TEM studies.

Antony, Rajini P. [Thin Films and Coatings Section, Surface and Nanoscience Division, Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamil Nadu (India); Mathews, Tom, E-mail: tom@igcar.gov.i [Thin Films and Coatings Section, Surface and Nanoscience Division, Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamil Nadu (India); Dasgupta, Arup [Physical Metallurgy Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamil Nadu (India); Dash, S.; Tyagi, A.K. [Thin Films and Coatings Section, Surface and Nanoscience Division, Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamil Nadu (India); Raj, Baldev [Thin Films and Coatings Section, Surface and Nanoscience Division, Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamil Nadu (India); Physical Metallurgy Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamil Nadu (India)

2011-03-15T23:59:59.000Z

158

Dielectric-Lined High-Gradient Accelerator Structure  

SciTech Connect

Rectangular particle accelerator structures with internal planar dielectric elements have been studied, with a view towards devising structures with lower surface fields for a given accelerating field, as compared with structures without dielectrics. Success with this concept is expected to allow operation at higher accelerating gradients than otherwise on account of reduced breakdown probabilities. The project involves studies of RF breakdown on amorphous dielectrics in test cavities that could enable high-gradient structures to be built for a future multi-TeV collider. The aim is to determine what the limits are for RF fields at the surfaces of selected dielectrics, and the resulting acceleration gradient that could be achieved in a working structure. The dielectric of principal interest in this study is artificial CVD diamond, on account of its advertised high breakdown field ({approx}2 GV/m for dc), low loss tangent, and high thermal conductivity. Experimental studies at mm-wavelengths on materials and structures for achieving high acceleration gradient were based on the availability of the 34.3 GHz third-harmonic magnicon amplifier developed by Omega-P, and installed at the Yale University Beam Physics Laboratory. Peak power from the magnicon was measured to be about 20 MW in 0.5 {micro}s pulses, with a gain of 54 dB. Experiments for studying RF high-field effects on CVD diamond samples failed to show any evidence after more than 10{sup 5} RF pulses of RF breakdown up to a tangential surface field strength of 153 MV/m; studies at higher fields were not possible due to a degradation in magnicon performance. A rebuild of the tube is underway at this writing. Computed performance for a dielectric-loaded rectangular accelerator structure (DLA) shows highly competitive properties, as compared with an existing all-metal structure. For example, comparisons were made of a DLA structure having two planar CVD diamond elements with a all-metal CERN structure HDS operating at 30 GHz. It was shown that the ratio of maximum surface electric field to accelerating field at the metal wall is only 0.35-0.4 for DLA, much smaller than the value 2.2 for HDS; and the ratio of surface magnetic field to accelerating field is 3.0 mA/V for DLA, compared with 3.45 mA/V for HDS. These values bode well for DLA in helping to avoid breakdown and to reducing pulsed surface heating and fatigue. The shunt impedance is found to be 160-175 M{Omega}/m for DLA, as compared to 99 M{Omega}/m for HDS. Conclusions are reached from this project that CVD diamond appears promising as a dielectric with a high threshold for RF breakdown, and that rectangular accelerator structures can be devised using planar CVD diamond elements that could be operated at higher acceleration gradients with low probability of RF breakdown, as compared with corresponding all-metallic structures.

Jay L. Hirshfield

2012-04-24T23:59:59.000Z

159

The application of spectrum standardization method for carbon analysis in coal using laser-induced breakdown spectroscopy  

E-Print Network (OSTI)

Measurements of carbon content in coal using laser-induced breakdown spectroscopy (LIBS) is limited by its low measurement precision and accuracy. A spectrum standardization method was proposed to achieve both reproducible and accurate results for the quantitative analysis of carbon content in coal with LIBS. The proposed method utilized the molecular carbon emissions to compensate the diminution of atomic carbon emission caused by matrix effect. The compensated carbon line intensities were further converted into an assumed standard state with fixed plasma temperature, electron density, and total number density of elemental carbon, which is proportional to its concentration in the coal samples. In addition, in order to obtained better compensation for total carbon number density fluctuations, an iterative algorithm was applied, which is different from our previous standardization calculations. The modified spectrum standardization model was applied to the measurement of carbon content in 24 bituminous coal sa...

Li, Xiongwei; Fu, Yangting; Li, Zheng; Liu, Jianming; Ni, Weidou

2014-01-01T23:59:59.000Z

160

Experimental observation of breakdowns in the Fermilab RF Gun G4 J.-P. Carneiro1, D. Edwards2, I. Gonin2, S. Schreiber1  

E-Print Network (OSTI)

Experimental observation of breakdowns in the Fermilab RF Gun G4 J.-P. Carneiro1, D. Edwards2, I Fermilab has developed and delivered to DESY Hamburg two RF guns for the operation of the phase I of the TESLA Test Facility (TTF) accelerator. The first RF gun (designated G3 in the following) has been

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


161

Structural Settings Of Hydrothermal Outflow- Fracture Permeability  

Open Energy Info (EERE)

Settings Of Hydrothermal Outflow- Fracture Permeability Settings Of Hydrothermal Outflow- Fracture Permeability Maintained By Fault Propagation And Interaction Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Structural Settings Of Hydrothermal Outflow- Fracture Permeability Maintained By Fault Propagation And Interaction Details Activities (1) Areas (1) Regions (0) Abstract: Hydrothermal outflow occurs most commonly at the terminations of individual faults and where multiple faults interact. These areas of fault propagation and interaction are sites of elevated stress termed breakdown regions. Here, stress concentrations cause active fracturing and continual re-opening of fluid-flow conduits, permitting long-lived hydrothermal flow despite potential clogging of fractures due to mineral precipitation. As

162

Investigation of the energy dependence of breakdown properties with a DC spark setup  

E-Print Network (OSTI)

The Compact LInear Collider (CLIC) study is a site independent feasibility study aiming at the development of a realistic technology at an affordable cost for a future linear electron-positron collider. The European Organization for Nuclear Research (CERN) is one of the collaborators for the CLIC study.The CLIC Test Facility (CTF3) positioned at CERN provides testing of this technology, including the testing of the proposed radio-frequency (RF) structures in a two-beam concept to produce the necessary accelerating electric field as high as 100 MV/m to reach the goal of a nominal total energy of 3 TeV. One problem at such high accelerating fields is electrical discharges, i.e. sparks, damaging the inside of the RF structures as well as deflecting the trajectories of accelerated particles. A Direct Current (DC) spark test setup is in use at CERN to aid the understanding of electrical discharges under vacuum conditions, also called vacuum arcs. In contrast to the more complex CTF3 setup, the DC spark setup is si...

Hansen, Anita; Calatroni, S

2009-01-01T23:59:59.000Z

163

Effects of Combustion-Induced Vortex Breakdown on Flashback Limits of Syngas-Fueled Gas Turbine Combustors  

SciTech Connect

Turbine combustors of advanced power systems have goals to achieve very low pollutants emissions, fuel variability, and fuel flexibility. Future generation gas turbine combustors should tolerate fuel compositions ranging from natural gas to a broad range of syngas without sacrificing operational advantages and low emission characteristics. Additionally, current designs of advanced turbine combustors use various degrees of swirl and lean premixing for stabilizing flames and controlling high temperature NOx formation zones. However, issues of fuel variability and NOx control through premixing also bring a number of concerns, especially combustor flashback and flame blowout. Flashback is a combustion condition at which the flame propagates upstream against the gas stream into the burner tube. Flashback is a critical issue for premixed combustor designs, because it not only causes serious hardware damages but also increases pollutant emissions. In swirl stabilized lean premixed turbine combustors onset of flashback may occur due to (i) boundary layer flame propagation (critical velocity gradient), (ii) turbulent flame propagation in core flow, (iii) combustion instabilities, and (iv) upstream flame propagation induced by combustion induced vortex breakdown (CIVB). Flashback due to first two foregoing mechanisms is a topic of classical interest and has been studied extensively. Generally, analytical theories and experimental determinations of laminar and turbulent burning velocities model these mechanisms with sufficient precision for design usages. However, the swirling flow complicates the flashback processes in premixed combustions and the first two mechanisms inadequately describe the flashback propensity of most practical combustor designs. The presence of hydrogen in syngas significantly increases the potential for flashback. Due to high laminar burning velocity and low lean flammability limit, hydrogen tends to shift the combustor operating conditions towards flashback regime. Even a small amount of hydrogen in a fuel blend triggers the onset of flashback by altering the kinetics and thermophysical characteristics of the mixture. Additionally, the presence of hydrogen in the fuel mixture modifies the response of the flame to the global effects of stretch and preferential diffusion. Despite its immense importance in fuel flexible combustor design, little is known about the magnitude of fuel effects on CIVB induced flashback mechanism. Hence, this project investigates the effects of syngas compositions on flashback resulting from combustion induced vortex breakdown. The project uses controlled experiments and parametric modeling to understand the velocity field and flame interaction leading to CIVB driven flashback.

Ahsan Choudhuri

2011-03-31T23:59:59.000Z

164

Observation of plasma array dynamics in 110 GHz millimeter-wave air breakdown  

SciTech Connect

We present dynamical measurements of self-organizing arrays of plasma structures in air induced by a 110 GHz millimeter-wave beam with linear or circular polarization. The formation of the individual plasmas and the growth of the array pattern are studied using a fast-gated (5-10 ns) intensified camera. We measure the time-dependent speed at which the array pattern propagates in discrete steps toward the millimeter-wave source, observing a peak speed greater than 100 km/s. We observe the expansion of an initially spherical plasma into a disk or an elongated filament, depending on the polarization of the incident beam. The results show good agreement with one-dimensional ionization-diffusion theory and two-dimensional simulations.

Cook, Alan M.; Hummelt, Jason S.; Shapiro, Michael A.; Temkin, Richard J. [Plasma Science and Fusion Center, Massachusetts Institute of Technology, 167 Albany St., Cambridge, Massachusetts 02139 (United States)

2011-10-15T23:59:59.000Z

165

Optical breakdown threshold in nanosecond high repetition second harmonic generation by periodically poled Mg-doped LiTaO{sub 3} crystal  

SciTech Connect

Our study shows that a local temperature increase of ?1 K in the crystal lattice caused by second harmonic generation (SHG) and two-photon absorption of 532 nm radiation at the rear of periodically poled stoichiometric LiTaO{sub 3} crystal by changing spontaneous polarization induces a pyroelectric field ?10 kV/cm, accelerating free electrons to an energy of ?10 eV, followed by optical breakdown and crystal damage. Theoretical analysis leads to an explicit expression for the threshold laser fluence of optical breakdown giving ?1.2 J/cm{sup 2} for 1064 nm input radiation in 6.8 kHz pulsed SHG operation, agreeing well with the experimentally found value ?1.32 J/cm{sup 2}.

Louchev, Oleg A.; Wada, Satoshi [Center for Advanced Photonics, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)] [Center for Advanced Photonics, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan); Hatano, Hideki; Kitamura, Kenji [Division of Environment and Energy Materials, National Institute for Materials Science (NIMS) 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)] [Division of Environment and Energy Materials, National Institute for Materials Science (NIMS) 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)

2013-08-26T23:59:59.000Z

166

,* Copper transport and accumulation in spruce stems (picea abies(L.) Karsten) revelaed by laser-induced breakdown spectroscopy  

SciTech Connect

Laser-Induced Breakdown Spectroscopy (LIBS) in double pulse configuration (DP LIBS) was used for scanning elemental spatial distribution in annual terminal stems of spruce (Picea abies (L.) Karsten). Cross sections of stems cultivated in Cu2+ solution of different concentrations were prepared and analyzed by DP LIBS. Raster scanning with 150 m spatial resolution was set and 2D (2-dimentional) maps of Cu and Ca distribution were created on the basis of the data obtained. Stem parts originating in the vicinity of the implementation of the cross sections were mineralized and subsequently Cu and Ca contents were analyzed by inductively coupled plasma mass spectrometry (ICP-MS). The results provide quantitative information about overall concentration of the elements in places, where LIBS measurements were performed. The fluorescence pictures were created to compare LIBS distribution maps and the fluorescence intensity (or the increase in autofluorescence) was used for the comparison of ICP-MS quantitative results. Results from these three methods can be utilized for quantitative measurements of copper ions transport in different plant compartments in dependence on the concentration of cultivation medium and/or the time of cultivation.

Krajcarova, Dr. Lucie [Czech Technical University; Novotny, Dr. Karel [Mendel University of Brno; Babula, Dr. Petr [Czech Technical University; Pravaznik, Dr Ivo [Czech Technical University; Kucerova, Dr. Petra [Czech Technical University; Vojtech, Dr. Adam [Czech Technical University; Martin, Madhavi Z [ORNL; Kizek, Dr. Rene [Czech Technical University; Kaiser, Jozef [ORNL

2013-01-01T23:59:59.000Z

167

Development of gas cluster ion beam surface treatments for reducing field emission and breakdown in RF cavities  

SciTech Connect

Sub-micron-scale surface roughness and contamination cause field emission that can lead to high voltage breakdown of electrodes, and these are limiting factors in the development of high gradient RF technology. We are studying various Gas Cluster Ion Beam (GCIB) treatments to smooth, clean, etch and/or chemically alter electrode surfaces to allow higher fields and accelerating gradients, and to reduce the time and cost of conditioning high voltage electrodes. For this paper, we have processed Nb, Stainless Steel, and Ti electrode materials using beams of Ar, O2, or NF3 +O2 clusters with accelerating potentials up to 35 kV. Using a Scanning Field Emission Microscope (SFEM), we have repeatedly seen a dramatic reduction in the number of field emission sites on Nb coupons treated with GCIB. Smoothing effects on Stainless steel and Ti substrates have been evaluated using AFM imaging and show that 200-nm wide polishing scratch marks are greatly attenuated. A 150-mm diameter GCIB treated stainless steel electrode has now shown virtually no DC field emission current at gradients over 20 MV/m.

D.R. Swenson; E. Degenkolb; A.T. Wu; Z. Insepov

2006-11-01T23:59:59.000Z

168

Study of the dielectric breakdown properties of hot SF{sub 6}–CF{sub 4} mixtures at 0.01–1.6 MPa  

SciTech Connect

The dielectric breakdown properties of SF{sub 6}–CF{sub 4} mixtures were investigated at different ratios of SF{sub 6}, 0.01–1.6 MPa, and gas temperatures up to 3000 K. Initially, the equilibrium compositions of SF{sub 6}–CF{sub 4} mixtures were calculated by minimizing the Gibbs free energy under the assumptions of local thermodynamic and chemical equilibrium. Then the electron energy distribution function was obtained based on those data by solving the Boltzmann equation under the zero-dimensional two-term spherical harmonic approximation. Finally, the critical reduced electric field strength (E/N){sub cr} of SF{sub 6}–CF{sub 4} mixtures, which is defined as the value for which total ionization reaction is equal to total attachment reaction, were determined and analyzed. The results confirm the superior breakdown properties of pure SF{sub 6} at relatively low gas temperatures. However, for higher gas temperatures (i.e., T > 2200 K at 0.4 MPa), the (E/N){sub cr} in SF{sub 6}–CF{sub 4} mixtures are obviously higher than that in pure SF{sub 6} and the values of (E/N){sub cr} increase with the reduction of the ratio of SF{sub 6}.

Li, Xingwen; Zhao, Hu; Jia, Shenli [State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, No. 28 XianNing West Road, Xi’an, Shaanxi Province 710049 (China)] [State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, No. 28 XianNing West Road, Xi’an, Shaanxi Province 710049 (China); Murphy, Anthony B. [CSIRO Materials Science and Engineering, PO Box 218, Lindfield, NSW 2070 (Australia)] [CSIRO Materials Science and Engineering, PO Box 218, Lindfield, NSW 2070 (Australia)

2013-08-07T23:59:59.000Z

169

The Structure of the Proton  

DOE R&D Accomplishments (OSTI)

The structure and size of the proton have been studied by means of the methods of high-energy electron scattering. The elastic scattering of electrons from protons in polyethylene has been investigated at the following energies in the laboratory system: 200, 300, 400, 500, 550 Mev. The range of laboratory angles examined has been 30 degrees to 135 degrees. At the largest angles and the highest energy, the cross section for scattering shows a deviation below that expected from a point proton by a factor of about nine. The magnitude and variation with angle of the deviations determine a structure factor for the proton, and thereby determine the size and shape of the charge and magnetic-moment distributions within the proton. An interpretation, consistent at all energies and angles and agreeing with earlier results from this laboratory, fixes the rms radius at 0.77 {plus or minus} 0.10 x 10{sup -13} cm for each of the charge and moment distributions. The shape of the density function is not far from a Gaussian with rms radius 0.70 x 10{sup -13} cm or an exponential with rms radius 0.80 x 10 {sup -13} cm. An equivalent interpretation of the experiments would ascribe the apparent size to a breakdown of the Coulomb law and the conventional theory of electromagnetism.

Chambers, E. E.; Hofstadter, R.

1956-04-00T23:59:59.000Z

170

Trench process and structure for backside contact solar cells with polysilicon doped regions  

DOE Patents (OSTI)

A solar cell includes polysilicon P-type and N-type doped regions on a backside of a substrate, such as a silicon wafer. An interrupted trench structure separates the P-type doped region from the N-type doped region in some locations but allows the P-type doped region and the N-type doped region to touch in other locations. Each of the P-type and N-type doped regions may be formed over a thin dielectric layer. Among other advantages, the resulting solar cell structure allows for increased efficiency while having a relatively low reverse breakdown voltage.

De Ceuster, Denis; Cousins, Peter John; Smith, David D

2014-03-18T23:59:59.000Z

171

Trench process and structure for backside contact solar cells with polysilicon doped regions  

DOE Patents (OSTI)

A solar cell includes polysilicon P-type and N-type doped regions on a backside of a substrate, such as a silicon wafer. An interrupted trench structure separates the P-type doped region from the N-type doped region in some locations but allows the P-type doped region and the N-type doped region to touch in other locations. Each of the P-type and N-type doped regions may be formed over a thin dielectric layer. Among other advantages, the resulting solar cell structure allows for increased efficiency while having a relatively low reverse breakdown voltage.

De Ceuster, Denis; Cousins, Peter John; Smith, David D

2013-05-28T23:59:59.000Z

172

A model combining spectrum standardization and dominant factor based partial least square method for carbon analysis in coal by laser-induced breakdown spectroscopy  

E-Print Network (OSTI)

Successful quantitative measurement of carbon content in coal using laser-induced breakdown spectroscopy (LIBS) is suffered from relatively low precision and accuracy. In the present work, the spectrum standardization method was combined with the dominant factor based partial least square (PLS) method to improve the measurement accuracy of carbon content in coal by LIBS. The combination model employed the spectrum standardization method to convert the carbon line intensity into standard state for more accurately calculating the dominant carbon concentration, and then applied PLS with full spectrum information to correct the residual errors. The combination model was applied to the measurement of carbon content for 24 bituminous coal samples. The results demonstrated that the combination model could further improve the measurement accuracy compared with both our previously established spectrum standardization model and dominant factor based PLS model using spectral area normalized intensity for the dominant fa...

Li, Xiongwei; Fu, Yangting; Li, Zheng; Ni, Weidou

2014-01-01T23:59:59.000Z

173

Dielectric breakdown properties of hot SF{sub 6}-CO{sub 2} mixtures at temperatures of 300–3500?K and pressures of 0.01–1.0?MPa  

SciTech Connect

Recently, much attention has been paid to SF{sub 6}-CO{sub 2} mixtures as one of substitutes for pure SF{sub 6} gas. In this paper, the dielectric breakdown properties of hot SF{sub 6}-CO{sub 2} mixtures are investigated at temperatures of 300–3500?K and pressures of 0.01–1.0?MPa. Under the assumptions of local thermodynamic equilibrium and local chemical equilibrium, the equilibrium compositions of hot SF{sub 6}-CO{sub 2} mixtures with different CO{sub 2} proportions are obtained based on Gibbs free energy minimization. The cross sections for interactions between electrons and neutral species are presented. Some unknown ionization cross sections are determined theoretically using Deutsch–Märk (DM) formalism based on quantum chemistry. Two-term Boltzmann equation is adopted to calculate the electron energy distribution function, reduced ionization coefficient, reduced attachment coefficient, and reduced effective ionization coefficient. Then the reduced critical electric field strength of mixtures, corresponding to dielectric breakdown performances, is determined when the generation and loss of electrons are balanced. Finally, the influences of temperature, pressure, and CO{sub 2} proportion on the reduced critical electric field strength are studied. It is found that a large percentage of CO{sub 2} can obviously reduce concentrations of high-energy electrons. At temperatures above 1750?K, an addition of CO{sub 2} to SF{sub 6} gas can enhance dielectric breakdown performances. However, at low temperatures, too much CO{sub 2} added into mixtures can reduce dielectric breakdown abilities. In addition, increasing gas pressure can improve dielectric breakdown performances. But the influence will be no more significant if pressure is over 0.8?MPa.

Zhong, Linlin; Yang, Aijun; Wang, Xiaohua, E-mail: xhw@mail.xjtu.edu.cn; Liu, Dingxin; Wu, Yi; Rong, Mingzhe, E-mail: mzrong@mail.xjtu.edu.cn [State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049 (China)] [State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049 (China)

2014-05-15T23:59:59.000Z

174

Domain growth in the random-field Ising model: The breakdown of self-similar scaling in two dimensions  

Science Journals Connector (OSTI)

We study a continuum random-field model of unstable domain growth in deep far-from-equilibrium quenches. We analyze the interfacial dynamics of the evolving domains and determine the growth laws and the structure factors in two and three dimensions. Our results can be interpreted as kinetic arguments, complementary to the equilibrium arguments of Imry and Ma, which are consistent with a lower critical dimension dl=2. In d=2 dimensions, we find that phase separation apparently stops, and that, as time tends to infinity, the renormalized "surface tension" vanishes. The results we obtain for the structure factor indicate that nonequilibrium scaling breaks down for d?2. Our theoretical predictions can be tested experimentally, or by computer simulation.

Martin Grant and J. D. Gunton

1984-06-01T23:59:59.000Z

175

Power-law Behavior of Strings Scattered from Domain-wall at High Energies and Breakdown of their Linear Relations  

E-Print Network (OSTI)

In contrast to the common wisdom, we discover that, instead of the exponential fall-off of the form factors with Regge-pole structure, the high-energy scattering amplitudes of string scattered from Domain-wall behave as power-law with Regge-pole structure. This is to be compared with the well-known power-law form factors without Regge-pole structure of the D-instanton scatterings. This discovery makes Domain-wall scatterings an unique example of a hybrid of string and field theory scatterings. The calculation is done for bosonic string scatterings of arbitrary massive string states from D-24 brane. Moreover, we discover that the usual linear relations of high-energy string scattering amplitudes at each fixed mass level break down for the Domain-wall scatterings. This result gives a strong evidence that the existence of the infinite linear relations, or stringy symmetries, of high-energy string scattering amplitudes is responsible for the softer, exponential fall-off high-energy string scatterings than the power-law field theory scatterings.

Chuan Tsung Chan; Jen-Chi Lee; Yi Yang

2006-10-19T23:59:59.000Z

176

Water Power Forum | OpenEI Community  

Open Energy Info (EERE)

Water Power Forum Water Power Forum Home > Water Power Forum > Posts by term Content Group Activity By term Q & A Feeds CBS (1) community (1) Cost (1) Current (1) current energy (1) DOE (1) forum (1) gateway (1) GMREC (1) LCOE (2) levelized cost of energy (1) marine energy (1) MHK (1) numerical modeling (1) ocean energy (1) OpenEI (1) Performance (1) Tidal (1) Water power (1) Wave (1) Groups Menu You must login in order to post into this group. Recent content MHK LCOE Reporting Guidance Draft MHK Cost Breakdown Structure Draft Global Marine Renewable Energy Conference (GMREC) OpenEI launches new Water Power Gateway and Community Forum Group members (8) Managers: Graham7781 Recent members: Gdavis Jim mcveigh Ocop Thomas.heibel NickL Kch Rmckeel 429 Throttled (bot load) Error 429 Throttled (bot load)

177

Structural Genomics  

Science Journals Connector (OSTI)

Structural Genomics ... Structural genomics is the field of science focused on the systematic determination of the three-dimensional structure of the proteins encoded into genomes. ... Structural genomics is spreading the philosophy of high throughput in all fields of science and making available new tools to speed up research procedures. ...

Ivano Bertini

2003-03-01T23:59:59.000Z

178

Design of a laser-induced breakdown spectroscopy system for on-line quality analysis of pulverized coal in power plants  

SciTech Connect

It is vitally important for a power plant to determine the chemical composition of coal prior to combustion in order to obtain optimal boiler control. In this work, a fully software-controlled laser-induced breakdown spectroscopy (LIBS) system comprising a LIBS apparatus and sampling equipment has been designed for possible application to power plants for on-line quality analysis of pulverized coal. Special attention was given to the LIBS system, the data processing methods (especially the normalization with Bode Rule/DC Level) and the specific settings (the software-controlled triggering source, high-pressure gas cleaning device, sample preparation module, sampling module, etc.), which gave the best direct measurement for C, H, Si, Na, Mg, Fe, Al, and Ti with measurement errors less than 10% for pulverized coal. Therefore, the apparatus is accurate enough to be applied to industries for on-line monitoring of pulverized coal. The method of proximate analysis was also introduced and the experimental error of A(ad) (Ash, 'ad' is an abbreviation for 'air dried') was shown in the range of 2.29 to 13.47%. The programmable logic controller (PLC) controlled on-line coal sampling equipment, which is designed based upon aerodynamics, and is capable of performing multipoint sampling and sample-preparation operation.

Yin, W.B.; Zhang, L.; Dong, L.; Ma, W.G.; Jia, S.T. [Shanxi Agricultural University, Taiyuan (China)

2009-08-15T23:59:59.000Z

179

Quantitative laser-induced breakdown spectroscopy data using peak area step-wise regression analysis: an alternative method for interpretation of Mars science laboratory results  

SciTech Connect

The ChemCam instrument on the Mars Science Laboratory (MSL) will include a laser-induced breakdown spectrometer (LIBS) to quantify major and minor elemental compositions. The traditional analytical chemistry approach to calibration curves for these data regresses a single diagnostic peak area against concentration for each element. This approach contrasts with a new multivariate method in which elemental concentrations are predicted by step-wise multiple regression analysis based on areas of a specific set of diagnostic peaks for each element. The method is tested on LIBS data from igneous and metamorphosed rocks. Between 4 and 13 partial regression coefficients are needed to describe each elemental abundance accurately (i.e., with a regression line of R{sup 2} > 0.9995 for the relationship between predicted and measured elemental concentration) for all major and minor elements studied. Validation plots suggest that the method is limited at present by the small data set, and will work best for prediction of concentration when a wide variety of compositions and rock types has been analyzed.

Clegg, Samuel M [Los Alamos National Laboratory; Barefield, James E [Los Alamos National Laboratory; Wiens, Roger C [Los Alamos National Laboratory; Dyar, Melinda D [MT HOLYOKE COLLEGE; Schafer, Martha W [LSU; Tucker, Jonathan M [MT HOLYOKE COLLEGE

2008-01-01T23:59:59.000Z

180

Coherent States of Accelerated Relativistic Quantum Particles, Vacuum Radiation and the Spontaneous Breakdown of the Conformal SU(2,2) Symmetry  

E-Print Network (OSTI)

We give a quantum mechanical description of accelerated relativistic particles in the framework of Coherent States (CS) of the (3+1)-dimensional conformal group SU(2,2), with the role of accelerations played by special conformal transformations and with the role of (proper) time translations played by dilations. The accelerated ground state $\\tilde\\phi_0$ of first quantization is a CS of the conformal group. We compute the distribution function giving the occupation number of each energy level in $\\tilde\\phi_0$ and, with it, the partition function Z, mean energy E and entropy S, which resemble that of an "Einstein Solid". An effective temperature T can be assigned to this "accelerated ensemble" through the thermodynamic expression dE/dS, which leads to a (non linear) relation between acceleration and temperature different from Unruh's (linear) formula. Then we construct the corresponding conformal-SU(2,2)-invariant second quantized theory and its spontaneous breakdown when selecting Poincar\\'e-invariant degenerated \\theta-vacua (namely, coherent states of conformal zero modes). Special conformal transformations (accelerations) destabilize the Poincar\\'e vacuum and make it to radiate.

M. Calixto; E. Perez-Romero; V. Aldaya

2010-12-21T23:59:59.000Z

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


181

On the global uniqueness for the Einstein-Maxwell-scalar field system with a cosmological constant. Part 1: Well posedness and breakdown criterion  

E-Print Network (OSTI)

This paper is the first part of a trilogy dedicated to the following problem: given spherically symmetric characteristic initial data for the Einstein-Maxwell-scalar field system with a cosmological constant $\\Lambda$, with the data on the outgoing initial null hypersurface given by a subextremal Reissner-Nordstrom black hole event horizon, study the future extendibility of the corresponding maximal globally hyperbolic development (MGHD) as a "suitably regular" Lorentzian manifold. In this first part we establish well posedness of the Einstein equations for characteristic data satisfying the minimal regularity conditions leading to classical solutions. We also identify the appropriate notion of maximal solution, from which the construction of the corresponding MGHD follows, and determine breakdown criteria. This is the unavoidable starting point of the analysis; our main results will depend on the detailed understanding of these fundamentals. In the second part of this series we study the stability of the radius function at the Cauchy horizon. In the third and final paper we show that, depending on the decay rate of the initial data, mass inflation may or may not occur; in fact, it is even possible to have (non-isometric) extensions of the spacetime across the Cauchy horizon as classical solutions of the Einstein equations.

João L. Costa; Pedro M. Girão; José Natário; Jorge Drumond Silva

2014-10-23T23:59:59.000Z

182

Life-cycle cost analysis of floating offshore wind farms  

Science Journals Connector (OSTI)

Abstract The purpose of this article is to put forward a methodology in order to evaluate the Cost Breakdown Structure (CBS) of a Floating Offshore Wind Farm (FOWF). In this paper CBS is evaluated linked to Life-Cycle Cost System (LCS) and taking into account each of the phases of the FOWF life cycle. In this sense, six phases will be defined: definition, design, manufacturing, installation, exploitation and dismantling. Each and every one of these costs can be subdivided into different sub-costs in order to obtain the key variables that run the life-cycle cost. In addition, three different floating platforms will be considered: semisubmersible, Tensioned Leg Platform (TLP) and spar. Several types of results will be analysed according to each type of floating platform considered: the percentage of the costs, the value of the cost of each phase of the life-cycle and the value of the total cost in each point of the coast. The results obtained allow us to become conscious of what the most important costs are and minimize them, which is one of the most important contributions nowadays. It will be useful to improve the competitiveness of floating wind farms in the future.

Castro-Santos Laura; Diaz-Casas Vicente

2014-01-01T23:59:59.000Z

183

Visible structures  

E-Print Network (OSTI)

All architecture is the interplay between structure, surface and ornament. Traditionally, ornament adorned structure thereby giving it its meaning. A society with its intellectual foundations resting in faith or the abstract ...

Conway, Helene Marie

1991-01-01T23:59:59.000Z

184

Structural biology  

Science Journals Connector (OSTI)

...systematic attempt to 1980 K. C. Holmes Structural biology...structural genomics (Shapiro & Lima 1998). The purpose...Rosenbaum, G., Holmes, K. C. & Witz, J. 1971 Synchrotron...95, 13 585^13590. Shapiro, L. & Lima, C. D. 1998 The Argonne...

1999-01-01T23:59:59.000Z

185

Born–Oppenheimer breakdown and non-adiabatic lifetimes of rovibrational levels of D2 lying near the n = 2 dissociation limit: Experiment and theory  

Science Journals Connector (OSTI)

The singlet gerade states of the hydrogen molecule are strongly affected by the breakdown of the Born–Oppenheimer approximation. This leads to strong non-adiabatic coupling resulting in large changes of the energies and lifetimes of the quantum levels compared to the values obtained in the Born–Oppenheimer or even the adiabatic levels of approximation. The non-adiabatic calculations of Quadrelli, Dressler, and Wolniewicz (1990) [7] (hereinafter QDW) for the three highest vibrational levels (? = 44, 45, and 46) of the EF 1?g+ state of D2 predicted an enormous increase of the lifetimes upon excitation of just one quantum of rotational motion. However, although our experimental results for these levels just below the n = 2 dissociation limit do show a strong increase in lifetime, the non-adiabatic lifetimes calculated by QDW are longer than experiment by as much as three orders of magnitude. In their work on isotopomers of hydrogen QDW and Yu and Dressler (1994) [5] published extensive summary tables of ab initio non-adiabatic coupling data. We present a technique which allows us to use their summary data to calculate approximate non-adiabatic ab initio lifetimes. The results reconcile our observed lifetimes with the non-adiabatic coupling from those previous ab initio calculations and also provide a detailed quantitative and qualitative understanding of the unusual rotational dependence of the lifetimes of these very highly excited levels. We also test the current technique by calculating the lifetimes of other levels involved in interactions with these EF levels and by calculating the lifetimes of the EF ? = 33 level of H2, for which no corresponding level exists in the Born–Oppenheimer or adiabatic approximations.

Stephen C. Ross; Koichi Tsukiyama

2011-01-01T23:59:59.000Z

186

High performance capacitors using nano-structure multilayer materials fabrication  

DOE Patents (OSTI)

A high performance capacitor is fabricated from nano-structure multilayer materials, such as by controlled, reactive sputtering, and having very high energy-density, high specific energy and high voltage breakdown. The multilayer capacitors, for example, may be fabricated in a ``notepad`` configuration composed of 200-300 alternating layers of conductive and dielectric materials so as to have a thickness of 1 mm, width of 200 mm, and length of 300 mm, with terminals at each end of the layers suitable for brazing, thereby guaranteeing low contact resistance and high durability. The notepad capacitors may be stacked in single or multiple rows (series-parallel banks) to increase the voltage and energy density. 5 figs.

Barbee, T.W. Jr.; Johnson, G.W.; O`Brien, D.W.

1995-05-09T23:59:59.000Z

187

High performance capacitors using nano-structure multilayer materials fabrication  

DOE Patents (OSTI)

A high performance capacitor fabricated from nano-structure multilayer materials, such as by controlled, reactive sputtering, and having very high energy-density, high specific energy and high voltage breakdown. The multilayer capacitors, for example, may be fabricated in a "notepad" configuration composed of 200-300 alternating layers of conductive and dielectric materials so as to have a thickness of 1 mm, width of 200 mm, and length of 300 mm, with terminals at each end of the layers suitable for brazing, thereby guaranteeing low contact resistance and high durability. The "notepad" capacitors may be stacked in single or multiple rows (series-parallel banks) to increase the voltage and energy density.

Barbee, Jr., Troy W. (Palo Alto, CA); Johnson, Gary W. (Livermore, CA); O'Brien, Dennis W. (Livermore, CA)

1995-01-01T23:59:59.000Z

188

High performance capacitors using nano-structure multilayer materials fabrication  

DOE Patents (OSTI)

A high performance capacitor is described which is fabricated from nano-structure multilayer materials, such as by controlled, reactive sputtering, and having very high energy-density, high specific energy and high voltage breakdown. The multilayer capacitors, for example, may be fabricated in a ``notepad`` configuration composed of 200--300 alternating layers of conductive and dielectric materials so as to have a thickness of 1 mm, width of 200 mm, and length of 300 mm, with terminals at each end of the layers suitable for brazing, thereby guaranteeing low contact resistance and high durability. The ``notepad`` capacitors may be stacked in single or multiple rows (series-parallel banks) to increase the voltage and energy density. 5 figs.

Barbee, T.W. Jr.; Johnson, G.W.; O`Brien, D.W.

1996-01-23T23:59:59.000Z

189

High performance capacitors using nano-structure multilayer materials fabrication  

DOE Patents (OSTI)

A high performance capacitor fabricated from nano-structure multilayer materials, such as by controlled, reactive sputtering, and having very high energy-density, high specific energy and high voltage breakdown. The multilayer capacitors, for example, may be fabricated in a "notepad" configuration composed of 200-300 alternating layers of conductive and dielectric materials so as to have a thickness of 1 mm, width of 200 mm, and length of 300 mm, with terminals at each end of the layers suitable for brazing, thereby guaranteeing low contact resistance and high durability. The "notepad" capacitors may be stacked in single or multiple rows (series-parallel banks) to increase the voltage and energy density.

Barbee, Jr., Troy W. (Palo Alto, CA); Johnson, Gary W. (Livermore, CA); O'Brien, Dennis W. (Livermore, CA)

1996-01-01T23:59:59.000Z

190

Microbial breakdown of Phaeocystis mucopolysaccharides  

Science Journals Connector (OSTI)

Department of Microbiology, University of Groningen, P.O. Box 14, 9750 AA Haren, The Netherlands. Marion van Rijssel. Department of Marine Biology, ...

1999-08-06T23:59:59.000Z

191

Protein Structure  

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

Protein Structure Protein Structure Name: Chris Location: N/A Country: N/A Date: N/A Question: what are the four levels or structure of protien Replies: Hi Chris... as you must know proteins are made of amino acids arranged in polypeptide chains, and the order of them in these chains is called primary structure. The regular way in which the polypeptide chains are arranged in space to form a protein molecule is called secondary structure. The arrangement of the three-dimensional structure of the polypeptide chain in space is the tertiary structure. The arrangement of the combination of two or more polypeptide chains constitutes the quartenary structure. Quite simple, isn't? If you just remember that the molecular weights of proteins range usually from 10,000 to 100,000 daltons (one dalton is the weight of one hydrogen atom) and that 20 different amino-acids in a chain 100 amino acids long can be arranged in far more than 10 to its 100 potency ( number 1 followed by 100 zeroes) ways!

192

Structured Descriptions  

E-Print Network (OSTI)

A descriptive formalism along with a philosophy for its use and expansion are presented wherein descriptions are of a highly structured nature. This descriptive system and the method of recognition are extended to the ...

Gabriel, Richard P.

193

Offshore structures  

Science Journals Connector (OSTI)

... SIR,-We have had some experience with modelling offshore structures in the laboratory, and wish to call attention to the need for better ... have already occurred have been serious enough, but the failure of one of the giant rigs or platforms now being planned would be a catastrophe of unprecedented proportions.

CHESLEY J. POSEY; RICHARD SILVESTER

1975-11-20T23:59:59.000Z

194

Membrane Structure  

Science Journals Connector (OSTI)

...structure. The gen-cral picturc (given bs both of' these workeirs \\aas very similar...Circle No. 82 on Readers Service Card Low cost student recording from Harvard Apparatus...Steim, thermal analysis; D. Chapman, nuclear magnet-ic resonance; H. M. McConnell...

D. E. Green

1971-11-19T23:59:59.000Z

195

Glass Structure  

Science Journals Connector (OSTI)

... Structure and Crystallization of Glasses. By WernerVogel. Pp. 246. (Pergamon: Oxford and New York, October 1971. ... account of the experimental work on liquid-liquid separation and nucleation and crystal growth in glasses carried out by the author and his colleagues in the laboratories of VEB Jena ...

R. W. DOUGLAS

1972-04-07T23:59:59.000Z

196

Terminal structure  

DOE Patents (OSTI)

A terminal structure (2) for a superconducting cable (1) is described. It consists of a conductor (2a) and an insulator (2b) that surrounds the conductor (2a), wherein the superconducting cable (1) has a core with a superconducting conductor (5) and a layer of insulation that surrounds the conductor (5), and wherein the core is arranged in such a way that it can move longitudinally in a cryostat. The conductor (2a) of the terminal structure (2) is electrically connected with the superconducting conductor (5) or with a normal conductor (6) that is connected with the superconducting conductor (5) by means of a tubular part (7) made of an electrically conductive material, wherein the superconducting conductor (5) or the normal conductor (6) can slide in the part (7) in the direction of the superconductor.

Schmidt, Frank (Langenhagen, DE); Allais, Arnaud (Hannover, DE); Mirebeau, Pierre (Villebon sur Yvette, FR); Ganhungu, Francois (Vieux-Reng, FR); Lallouet, Nicolas (Saint Martin Boulogne, FR)

2009-10-20T23:59:59.000Z

197

Airfoil structure  

DOE Patents (OSTI)

Past airfoil configurations have been used to improve aerodynamic performance and engine efficiencies. The present airfoil configuration further increases component life and reduces maintenance by reducing internal stress within the airfoil itself. The airfoil includes a chord and a span. Each of the chord and the span has a bow being summed to form a generally "C" configuration of the airfoil. The generally "C" configuration includes a compound bow in which internal stresses resulting from a thermal temperature gradient are reduced. The structural configuration reduces internal stresses resulting from thermal expansion.

Frey, Gary A. (Poway, CA); Twardochleb, Christopher Z. (Alpine, CA)

1998-01-01T23:59:59.000Z

198

Airfoil structure  

DOE Patents (OSTI)

Past airfoil configurations have been used to improve aerodynamic performance and engine efficiencies. The present airfoil configuration further increases component life and reduces maintenance by reducing internal stress within the airfoil itself. The airfoil includes a chord and a span. Each of the chord and the span has a bow being summed to form a generally ``C`` configuration of the airfoil. The generally ``C`` configuration includes a compound bow in which internal stresses resulting from a thermal temperature gradient are reduced. The structural configuration reduces internal stresses resulting from thermal expansion. 6 figs.

Frey, G.A.; Twardochleb, C.Z.

1998-01-13T23:59:59.000Z

199

Genomic Insights into Processes Driving the Infection of Alexandrium tamarense by the Parasitoid Amoebophrya sp.  

Science Journals Connector (OSTI)

...acid sequences with the Virtual Ribosome tool ( http://www.cbs.dtu.dk/services/VirtualRibosome ), and the batch web CD-search tool ( http://www.ncbi.nlm.nih.gov/Structure/bwrpsb/bwrpsb.cgi ) was used to assign eukaryotic...

Yameng Lu; Sylke Wohlrab; Gernot Glöckner; Laure Guillou; Uwe John

2014-09-19T23:59:59.000Z

200

Structural Characterization  

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

Characterization Characterization and Comparison of Switchgrass Ball-milled Lignin Before and After Dilute Acid Pretreatment Reichel Samuel & Yunqiao Pu & Babu Raman & Arthur J. Ragauskas Received: 25 April 2009 / Accepted: 10 August 2009 # Humana Press 2009 Abstract To reduce the recalcitrance and enhance enzymatic activity, dilute H 2 SO 4 pretreatment was carried out on Alamo switchgrass (Panicum virgatum). Ball-milled lignin was isolated from switchgrass before and after pretreatment. Its structure was characterized by 13 C, HSQC, and 31 P NMR spectroscopy. It was confirmed that ball-milled switchgrass lignin is of HGS type with a considerable amount of p-coumarate and felurate esters of lignin. The major ball-milled lignin interunit was the β-O-4 linkage, and a minor amount of phenylcoumarin, resinol, and spirodienone units were also present. As a result of the acid pretreatment,

Note: This page contains sample records for the topic "breakdown structure cbs" 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

Armor structures  

DOE Patents (OSTI)

An armor structure includes first and second layers individually containing a plurality of i-beams. Individual i-beams have a pair of longitudinal flanges interconnected by a longitudinal crosspiece and defining opposing longitudinal channels between the pair of flanges. The i-beams within individual of the first and second layers run parallel. The laterally outermost faces of the flanges of adjacent i-beams face one another. One of the longitudinal channels in each of the first and second layers faces one of the longitudinal channels in the other of the first and second layers. The channels of the first layer run parallel with the channels of the second layer. The flanges of the first and second layers overlap with the crosspieces of the other of the first and second layers, and portions of said flanges are received within the facing channels of the i-beams of the other of the first and second layers.

Chu, Henry Shiu-Hung [Idaho Falls, ID; Lacy, Jeffrey M [Idaho Falls, ID

2008-04-01T23:59:59.000Z

202

NMR and Structural Genomics  

Science Journals Connector (OSTI)

NMR and Structural Genomics ... The role of NMR in structural genomics is outlined, with particular emphasis on using protein domains as targets. ... Targets in Structural Genomics ...

David Staunton; Jo Owen; Iain D. Campbell

2002-12-07T23:59:59.000Z

203

Theory of factors limiting high gradient operation of warm accelerating structures  

SciTech Connect

This final report summarizes the research performed during the time period from 8/1/2010 to 7/31/2013. It consists of two parts describing our studies in two directions: (a) analysis of factors limiting operation of dielectric-loaded accelerating (DLA) structures where the main problem is the occurrence of multipactor on dielectric surfaces, and (b) studies of effects associated with either RF magnetic or RF electric fields which may cause the RF breakdown in high-gradient metallic accelerating structures. In the studies of DLA structures, at least, two accomplishments should be mentioned: the development of a 3D non-stationary, self-consistent code describing the multipactor phenomena and yielding very good agreement with some experimental data obtained in joint ANL/NRL experiments. In the metallic structures, such phenomena as the heating and melting of micro-particles (metallic dust) by RF electric and magnetic fields in single-shot and rep-rate regimes is analyzed. Also, such processes in micro-protrusions on the structure surfaces as heating and melting due to the field emitted current and the Nottingham effect are thoroughly investigated with the account for space charge of emitted current on the field emission from the tip.

Nusinovich, Gregory S. [University of Maryland; Antonsen, Thomas M. [University of Maryland; Kishek, Rami [University of Maryland

2014-07-25T23:59:59.000Z

204

Comparative genomics of citric-acid producing Aspergillus niger ATCC 1015 versus enzyme-producing CBS 513.88  

E-Print Network (OSTI)

1992.   Cloning  the  alpha?amylase  cDNA  of  Aspergillus expression  of  two  alpha? amylase genes from Aspergillus 

Grigoriev, Igor V.

2011-01-01T23:59:59.000Z

205

9 - Structures in Matlab  

Science Journals Connector (OSTI)

This chapter explains both structures and vectors of structures in Matlab. The chapter starts by explaining the need for a structure class in programming usage and how structures can be used to improve the readability of Matlab programs. A number of examples that explain structures in Matlab are given here. The chapter concludes with the fox and rabbit game project. The reader is encouraged here to program this game using structures in order to gain an in-depth understanding of their use and value. Keywords Structures, vectors of structures, fox and rabbit game

Munther Gdeisat; Francis Lilley

2013-01-01T23:59:59.000Z

206

Earth Structure Introduction  

E-Print Network (OSTI)

Earth Structure Introduction Earth Structure (2nd Edition), 2004 W.W. Norton & Co, New York Slide show by Ben van der Pluijm © WW Norton, unless noted otherwise #12;© EarthStructure (2nd ed) 210/4/2010 Aerial views #12;© EarthStructure (2nd ed) 310/4/2010 http://www.globalchange.umich.edu/Ben/ES/ #12

207

Project Management Guide | Department of Energy  

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

Management Structure projects Project Management Guide More Documents & Publications DOE Work Breakdown Structure Handbook PROJECT PLANNING TEMPLATE NDIAPMSCEVMSIntentGuide...

208

Protein Structure Prediction and Structural Genomics  

Science Journals Connector (OSTI)

...large-scale modeling calculations have...accuracy by comparative modeling. Even with structural...as a result of a rapid increase in alignment...structures will allow the modeling of a very much larger...development of molecular simulation methods, attempts...macromolecules (40). Automated methods for deducing...

David Baker; Andrej Sali

2001-10-05T23:59:59.000Z

209

Microsoft PowerPoint - FinalModule2.ppt  

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

2: Work Breakdown Structure 2: Work Breakdown Structure Prepared by: Module 2 - Work Breakdown Structure 1 Prepared by: Booz Allen Hamilton Module 2: Work Breakdown Structure Welcome to Module 2. The objective of this module is to introduce you to Work Breakdown Structure (WBS) and other supporting documents. This module will include defining and illustrating the following topics: * Work Breakdown Structure * WBS dictionary * Organizational Breakdown Structure (OBS) * Responsibility Assignment Matrix (RAM) Module 2 - Work Breakdown Structure 2 Prepared by: Booz Allen Hamilton What is a Work Breakdown Structure? Planning a project using earned value management is no different than the initial planning necessary to implement any given project. There are basic items that you need to know and understand as a project manager:

210

JGI - Structural Genomics Program  

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

Structural Genomics Program Structural Genomics Program The structural characterization of proteins of unknown function can be described as structural genomics, an approach in which structure determination by X-ray crystallography supplies key functional information. This is exemplified by studies of the carboxysome. The structures of the first carboxysome shell proteins (Kerfeld et al., Science 2005) confirmed earlier hypotheses that they are indeed the basic building blocks of the carboxysome shell; the quaternary structure and the higher order assemblies of the proteins in the crystals provided insight into how they assemble into shell facets. Likewise, our structure of the carboxysome component CsoS3 revealed that it was a member of the beta-carbonic family, despite having no detectable sequence homology at the level of primary structure

211

High-Temperature Enzymatic Breakdown of Cellulose  

Science Journals Connector (OSTI)

...Materiais, Campinas/SP, Brazil. Supplemental material...friends at the National Renewable Energy Laboratory (NREL) for...funded by Department of Energy awards 06103-OKL and...Cellulose is an abundant and renewable biopolymer that can be...

Hongliang Wang; Fabio Squina; Fernando Segato; Andrew Mort; David Lee; Kirk Pappan; Rolf Prade

2011-06-17T23:59:59.000Z

212

Breakdown in the Wetting Transparency of Graphene  

E-Print Network (OSTI)

We develop a theory to model the van der Waals interactions between liquid and graphene, including quantifying the wetting behavior of a graphene-coated surface. Molecular dynamics simulations and contact angle measurements ...

Shih, Chih-Jen

213

Laser-induced ignition by optical breakdown  

Science Journals Connector (OSTI)

This paper is an experimental work of the applied methodical character in which as an attempt to optimize a laser ignition system a systematic study of the best incoupling geometry for the employed Nd:YAG laser w...

E. Schwarz; I. Muri; J. Tauer; H. Kofler; E. Wintner

2010-06-01T23:59:59.000Z

214

Ion manipulation device with electrical breakdown protection  

DOE Patents (OSTI)

An ion manipulation method and device is disclosed. The device includes a pair of substantially parallel surfaces. An array of inner electrodes is contained within, and extends substantially along the length of, each parallel surface. The device includes a first outer array of electrodes and a second outer array of electrodes. Each outer array of electrodes is positioned on either side of the inner electrodes, and is contained within and extends substantially along the length of each parallel surface. A DC voltage is applied to the first and second outer array of electrodes. A RF voltage, with a superimposed electric field, is applied to the inner electrodes by applying the DC voltages to each electrode. Ions either move between the parallel surfaces within an ion confinement area or along paths in the direction of the electric field, or can be trapped in the ion confinement area. The surfaces are housed in a chamber, and at least one electrically insulative shield is coupled to an inner surface of the chamber for increasing a mean-free-path between two adjacent electrodes in the chamber.

Chen, Tsung-Chi; Tang, Keqi; Ibrahim, Yehia M; Smith, Richard D; Anderson, Gordon A; Baker, Erin M

2014-12-02T23:59:59.000Z

215

Coupling of H vibration to substrate electronic states in Mo(100)-p(1×1)H and W(100)-p(1×1)H: Example of strong breakdown of adiabaticity  

Science Journals Connector (OSTI)

The surface infrared reflectance spectra of Mo(100)-p(1×1)H and W(100)-p(1×1)H are both characterized by two vibrational absorptions in the 800–4000-cm-1 region—a broad band at 1016 cm-1 at T=100 K for H on Mo(100) and at 1069 cm-1 at T=300 K for H on W(100), corresponding to the symmetric stretch (?1), and a narrow derivative-like feature at 1302 cm-1 on Mo(100) and at 1269 cm-1 on W(100), identified as the first overtone of the wag motion (2?2). The physical origin of the line shapes, as well as the larger intensity of the 2?2 than expected from adiabatic considerations, were investigated through phenomenological line-shape analysis of data obtained as a function of temperature and relative H/D and H/CO coadsorption concentrations. Inhomogeneous broadening is negligible, and dephasing processes contribute weakly to both ?1 and 2?2 linewidths. The most distinctive feature of the spectra, the derivative or ‘‘Fano shape’’ of 2?2, arises from a nonadiabatic coupling between the sharp 2?2 vibration and the continuum absorption due to surface electronic transitions. The asymmetry parameter ??0??, which gauges the 2?2-continuum coupling strength, is temperature insensitive and does not exhibit an isotopic dependence, as predicted for a strong breakdown of adiabaticity. The narrow linewidths observed for 2?2 on both surfaces at T=100 K, 12.2 cm-1 on Mo(100) and 18.5 cm-1 on W(100), set a limit on the lifetime of these vibrational levels at T1?0.9 ps and T1?0.6 ps, respectively.Direct evidence for the electronic excitation continuum that interacts with 2?2 is obtained by analyzing changes in broadband reflectivity measurements on W(100)/H and Mo(100)/H as a function of coverage. Both H-saturated surfaces exhibit a strong absorption with x-y symmetry that can be related to optical excitation of surface states. Further support for surface-state participation in the nonadiabatic process is inferred from the strong attenuation of the 2?2 intensity upon CO co-adsorption.

J. E. Reutt; Y. J. Chabal; S. B. Christman

1988-08-15T23:59:59.000Z

216

Structuring beyond architecture  

E-Print Network (OSTI)

This thesis explores the layering and negotiation of structural devices in urban settings. Its point of departure is a series of patterns of how structural design and urban design interact and overlap, from which are ...

Foxe, David M

2006-01-01T23:59:59.000Z

217

Neutron reflecting supermirror structure  

DOE Patents (OSTI)

An improved neutron reflecting supermirror structure comprising a plurality of stacked sets of bilayers of neutron reflecting materials. The improved neutron reflecting supermirror structure is adapted to provide extremely good performance at high incidence angles, i.e. up to four time the critical angle of standard neutron mirror structures. The reflection of neutrons striking the supermirror structure at a high critical angle provides enhanced neutron throughput, and hence more efficient and economical use of neutron sources. 2 figs.

Wood, J.L.

1992-12-01T23:59:59.000Z

218

Neutron reflecting supermirror structure  

DOE Patents (OSTI)

An improved neutron reflecting supermirror structure comprising a plurality of stacked sets of bilayers of neutron reflecting materials. The improved neutron reflecting supermirror structure is adapted to provide extremely good performance at high incidence angles, i.e. up to four time the critical angle of standard neutron mirror structures. The reflection of neutrons striking the supermirror structure at a high critical angle provides enhanced neutron throughput, and hence more efficient and economical use of neutron sources.

Wood, James L. (Drayton Plains, MI)

1992-01-01T23:59:59.000Z

219

Catalytic distillation structure  

SciTech Connect

Catalytic distillation structure for use in reaction distillation columns, a providing reaction sites and distillation structure and consisting of a catalyst component and a resilient component intimately associated therewith. The resilient component has at least about 70 volume % open space and being present with the catalyst component in an amount such that the catalytic distillation structure consist of at least 10 volume % open space.

Smith, Jr., Lawrence A. (Bellaire, TX)

1984-01-01T23:59:59.000Z

220

Chemical Structure and Dynamics  

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

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

Note: This page contains sample records for the topic "breakdown structure cbs" 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

Structures and Energetics of Unimolecular Thermal Degradation of Isopropyl Butanoate as a Model Biofuel: Density Functional Theory and Ab Initio Studies  

Science Journals Connector (OSTI)

Chemistry Department, Faculty of Science, El-Menoufia University, Shebin El-Kom, Egypt ... Increased demand for energy, climate change, air pollution, the higher cost for crude oil, and limited reserves of fossil fuel together push the search for alternative renewable fuels. ... The results obtained can be summarized as follows: (1) Values of the energy barriers and bond dissociation energies for the three esters calculated at BMK correlate well with CBS-QB3 values. ...

Ahmed M. El-Nahas; Lobna A. Heikal; Ahmed H. Mangood; El-Sayed E. El-Shereefy

2010-07-12T23:59:59.000Z

222

Electroluminescence at 1.54 {mu}m in Si:Er/Si structures grown by sublimation molecular-beam epitaxy  

SciTech Connect

In Si:Er/Si diode structures grown by sublimation molecular-beam epitaxy in a vacuum with a pressure of {approx}10{sup -7} mbar at temperatures 520-580 deg. C, the intensity of room-temperature electroluminescence at 1.54 {mu}m is studied as a function of the concentration and distribution of erbium and donor impurities in the space-charge region (SCR) and the SCR width. Methods for obtaining electroluminescence in diodes with a wide (0.1-1 {mu}m) SCR are developed. The mean free path of electrons with respect to their interaction with Er centers and the threshold energy a free electron needs in order to excite an Er-shell electron are determined. The values of electric-field strength corresponding to breakdown in silicon p-i-n diodes with and without Er doping are obtained experimentally. A model describing the interaction of hot electrons with Er centers is suggested.

Kuznetsov, V. P. [Nizhni Novgorod State University, Physicotechnical Research Institute (Russian Federation)], E-mail: Kuznetsov_VP@mail.ru; Remizov, D. Yu. [Russian Academy of Sciences, Institute for Physics of Microstructures (Russian Federation); Shabanov, V. N.; Rubtsova, R. A. [Nizhni Novgorod State University, Physicotechnical Research Institute (Russian Federation); Stepikhova, M. V.; Kryzhov, D. I. [Russian Academy of Sciences, Institute for Physics of Microstructures (Russian Federation); Shushunov, A. N.; Belova, O. V. [Nizhni Novgorod State University, Physicotechnical Research Institute (Russian Federation); Krasil'nik, Z. F. [Russian Academy of Sciences, Institute for Physics of Microstructures (Russian Federation); Maksimov, G. A. [Nizhni Novgorod State University, Physicotechnical Research Institute (Russian Federation)

2006-07-15T23:59:59.000Z

223

Impact of high-oxygen thermal annealing on the structural, optical and electrical properties of ZnO discs made from 20-nm ZnO nanoparticles  

Science Journals Connector (OSTI)

20-nm nanoparticles of zinc oxide (ZnO) were used to make high-density ZnO discs by uniaxial pressing at 4 ton/cm2 pressure and sintering at 1200 °C for 1 hour. High-oxygen thermal annealing performed on the ZnO discs was found to have a profound impact especially enhanced grain growth even at a low annealing temperature of only 400 °C. Moreover we observed a unique secondary growth of ZnO nanoparticles and growth of multilayer grains that have not been reported elsewhere. The strong solid state reaction during annealing was probably attributed to the high surface area of the 20-nm ZnO nanoparticles that promoted strong surface reaction even at low annealing temperatures. The ZnO discs have been found to contain a very high concentration of structural defects (oxygen vacancies and zinc/oxygen interstitials) that was indicated by the dominant and broad visible photoluminescence (PL) emission in the green band with peaks at (519 - 533) nm and it was found that this visible emission was greatly increased after annealing treatment especially at 800 °C. Annealing treatment also was found to improved the grain crystallinity as illustrated by the lowering of intrinsic compressive stress based on the XRD lattice constant and full-wave half-maximum (FWHM) data. The electrical properties of the ZnO discs were also greatly influenced by the annealing treatment especially a big drop in the breakdown voltage from 362 V (as-grown sample) to 170 V (800 °C sample). The resistivity also experienced a dramatic drop from 267 k?.cm (as-grown sample) to 74.6 k?.cm (800 °C sample). High-oxygen thermal annealing can be employed as a new technique in controlling the breakdown voltage of ZnO discs made from ZnO nanoparticles with improved structural properties.

Rabab Khalid Sendi; Shahrom Mahmud

2012-01-01T23:59:59.000Z

224

Catalytic distillation structure  

DOE Patents (OSTI)

Catalytic distillation structure is described for use in reaction distillation columns, and provides reaction sites and distillation structure consisting of a catalyst component and a resilient component intimately associated therewith. The resilient component has at least about 70 volume % open space and is present with the catalyst component in an amount such that the catalytic distillation structure consists of at least 10 volume % open space. 10 figs.

Smith, L.A. Jr.

1984-04-17T23:59:59.000Z

225

Detection of structural degradation  

SciTech Connect

A time domain method developed for determining dynamic system characteristics is applied to structural monitoring and/or flaw detection. The potential usefulness for monitoring is evaluated based on several criteria, which include sensitivity to structural changes, location of flaws, and dependence upon excitation signals. The strengths and weaknesses of the methods are discussed. Also, structural monitoring using a signal's singular values is presented and evaluated. 2 refs., 4 figs., 2 tabs.

Endebrock, E.G.

1991-01-01T23:59:59.000Z

226

Cosmogony of Generic Structures  

E-Print Network (OSTI)

The problem of formation of generic structures in the Universe is addressed, whereby first the kinematics of inertial continua for coherent initial data is considered. The generalization to self--gravitating continua is outlined focused on the classification problem of singularities and metamorphoses arising in the density field. Self--gravity gives rise to an internal hierarchy of structures, and, dropping the assumption of coherence, also to an external hierarchy of structures dependent on the initial power spectrum of fluctuations.

T. Buchert

1994-12-19T23:59:59.000Z

227

Neutron reflecting supermirror structure  

DOE Patents (OSTI)

An improved neutron reflecting supermirror structure comprising a plurality of stacked sets of bilayers of neutron reflecting materials. The improved neutron reflecting supermirror structure is adapted to provide extremely good performance at high incidence angles, i.e. up to four time the critical angle of standard neutron mirror structures. The reflection of neutrons striking the supermirror structure at a high critical angle provides enhanced neutron throughput, and hence more efficient and economical use of neutron sources. One layer of each set of bilayers consist of titanium, and the second layer of each set of bilayers consist of an alloy of nickel with carbon interstitially present in the nickel alloy.

Wood, James L. (Drayton Plains, MI)

1992-01-01T23:59:59.000Z

228

Controlling Graphene's Electronic Structure  

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

Controlling Graphene's Electronic Structure Print Graphene, because of its unusual electron properties, reduced dimensionality, and scale, has enormous potential for use in...

229

Controlling Graphene's Electronic Structure  

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

Controlling Graphene's Electronic Structure Print Wednesday, 25 April 2007 00:00 Graphene, because of its unusual electron properties, reduced dimensionality, and scale, has...

230

Protein Structure Prediction and Structural Genomics  

E-Print Network (OSTI)

sequencing projects are producing linear amino acid sequences, but full understanding of the biological role, building a model, and assessing the model (1). The templates for modeling may be found by sequence folds. Each sequence-structure alignment is as- sessed by the energy of a corresponding coarse model

Batzoglou, Serafim

231

Calcium silicate insulation structure  

DOE Patents (OSTI)

An insulative structure including a powder-filled evacuated casing utilizes a quantity of finely divided synthetic calcium silicate having a relatively high surface area. The resultant structure-provides superior thermal insulating characteristics over a broad temperature range and is particularly well-suited as a panel for a refrigerator or freezer or the insulative barrier for a cooler or a insulated bottle.

Kollie, Thomas G. (Oak Ridge, TN); Lauf, Robert J. (Oak Ridge, TN)

1995-01-01T23:59:59.000Z

232

ISG8-Structures  

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

Structures (WG4) Structures (WG4) Orange Rm H. Carter, T. Higo and J. Wang Parallel Sessions: Working Groups: WG1: Parameters, Design, Instrumentation and Tuning WG2: Damping Rings and ATF WG3: RF Sources WG4:Structures WG5: Ground Motion; Site Requirements and Investigations Goals Review of progress and experiences in design and fabrication. Review of high gradient tests. R&D plan and schedule through spring of 2003. Plan and schedule for production of 8-pack structures. Plan and schedule to document how to manufacture and process NLC/JLC accelerator structures. Preliminary Agenda Monday 9:00 Plenary 10:30 Coffee Break 11:00 – 12:00 Working Group Organization Opening Remarks - Dave Burke, Ron Ruth, Nobu Toge Discussion: Agenda and working group organization Lunch 13:30 – 15:30 High Gradient Test (Joint session with WG3)

233

Best Data Structure  

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

Best Data Structure Best Data Structure Name: Harold Status: student Grade: 12+ Country: USA Date: Fall 2011 Question: What is he "best" data-structure? Replies: There is no "best" data structure. First, you must define what is meant by "best" (smallest memory footprint, fastest, most scalable, etc.). Then you must take constraints into account (like cost, development time, etc.). Then you make an decision as to what is best (based on experience). People with different experiences often make different decisions as to what is "best". Also, what data structures is "best" depends on the problem being solved. Different problems often have different "best" solutions, everything else being equal. Scott P. Smith Hi Harold,

234

Optoelectronic Mounting Structure  

DOE Patents (OSTI)

An optoelectronic mounting structure is provided that may be used in conjunction with an optical transmitter, receiver or transceiver module. The mounting structure may be a flexible printed circuit board. Thermal vias or heat pipes in the head region may transmit heat from the mounting structure to the heat spreader. The heat spreader may provide mechanical rigidity or stiffness to the heat region. In another embodiment, an electrical contact and ground plane may pass along a surface of the head region so as to provide an electrical contact path to the optoelectronic devices and limit electromagnetic interference. In yet another embodiment, a window may be formed in the head region of the mounting structure so as to provide access to the heat spreader. Optoelectronic devices may be adapted to the heat spreader in such a manner that the devices are accessible through the window in the mounting structure.

Anderson, Gene R. (Albuquerque, NM); Armendariz, Marcelino G. (Albuquerque, NM); Baca, Johnny R. F. (Albuquerque, NM); Bryan, Robert P. (Albuquerque, NM); Carson, Richard F. (Albuquerque, NM); Chu, Dahwey (Albuquerque, NM); Duckett, III, Edwin B. (Albuquerque, NM); McCormick, Frederick B. (Albuquerque, NM); Peterson, David W. (Sandia Park, NM); Peterson, Gary D. (Albuquerque, NM); Reber, Cathleen A. (Corrales, NM); Reysen, Bill H. (Lafayette, CO)

2004-10-05T23:59:59.000Z

235

Capital structure choices  

Science Journals Connector (OSTI)

Corporate finance theory provides a number of competing hypotheses for explaining the capital structure choice of firms. The major ones are the 'trade-off' theory, which hypothesises an optimal combination of debt and equity capital, and the 'pecking-order' theory, which suggests a ranking order between different types of capital making a firm's capital structure an aggregated result of successive financial decisions. Previous studies find evidence both supporting and contradicting the two theories. We examine the role and importance of different firm characteristics as well as to what extent managers in Swedish firms make capital structure choices in accordance with the theories and are affected by concepts like optimal capital structure, financial hierarchy, windows of opportunity, signalling, asymmetric information and flexibility. Our conclusion is that capital structure choices are built on a balancing notion suggesting a revised trade-off theory or alternatively an extended pecking order theory also incorporating agency costs and signalling.

Ted Lindblom; Gert Sandahl; Stefan Sjogren

2011-01-01T23:59:59.000Z

236

SCRATCH: a protein structure and structural feature prediction server  

E-Print Network (OSTI)

SCRATCH: a protein structure and structural feature prediction server J. Cheng, A. Z. Randall, M. J protein tertiary structure and structural features. The SCRATCH soft- ware suite includes predictors for secondary structure, relative solvent accessibility, disordered regions, domains, disulfide bridges, single

Cheng, Jianlin Jack

237

Effect of buffer structures on AlGaN/GaN high electron mobility transistor reliability  

SciTech Connect

AlGaN/GaN high electron mobility transistors (HEMTs) with three different types of buffer layers, including a GaN/AlGaN composite layer, or 1 or 2 lm GaN thick layers, were fabricated and their reliability compared. The HEMTs with the thick GaN buffer layer showed the lowest critical voltage (Vcri) during off-state drain step-stress, but this was increased by around 50% and 100% for devices with the composite AlGaN/GaN buffer layers or thinner GaN buffers, respectively. The Voff - state for HEMTs with thin GaN and composite buffers were 100 V, however, this degraded to 50 60V for devices with thick GaN buffers due to the difference in peak electric field near the gate edge. A similar trend was observed in the isolation breakdown voltage measurements, with the highest Viso achieved based on thin GaN or composite buffer designs (600 700 V), while a much smaller Viso of 200V was measured on HEMTs with the thick GaN buffer layers. These results demonstrate the strong influence of buffer structure and defect density on AlGaN/GaN HEMT performance and reliability.

Liu, L. [University of Florida, Gainesville; Xi, Y. Y. [University of Florida, Gainesville; Ren, F. [University of Florida; Pearton, S. J. [University of Florida; Laboutin, O. [Kopin Corporation, Taunton, MA; Cao, Yu [Kopin Corporation, Taunton, MA; Johnson, Wayne J. [Kopin Corporation, Taunton, MA; Kravchenko, Ivan I [ORNL

2012-01-01T23:59:59.000Z

238

Undergraduate Program Salary Structure  

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

Salary Structure Salary Structure Undergraduate Program Salary Structure Point your career towards LANL: work with the best minds on the planet in an inclusive environment that is rich in intellectual vitality and opportunities for growth. Contact Student Programs (505) 665-8899 Email Undergraduate salary determination process Salaries are evaluated from students' current transcripts based on college academic progression and hours completed in a degree program. Administrative/professional structure Years Description Yearly Hourly HS +0 HS grad & acceptance to college $20,900/yr $10.05/hr HS +1 Completion of first year and minimum of 24 semester hours $24,560/yr $11.81/hr HS +2 Completion of second year and minimum of 48 semester hours (salary cap for students pursuing an Associate's Degree) $27,540/yr $13.24/hr

239

Graduate Program Salary Structure  

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

Salary Structure Salary Structure Graduate Program Salary Structure Point your career towards LANL: work with the best minds on the planet in an inclusive environment that is rich in intellectual vitality and opportunities for growth. Contact Student Programs (505) 665-8899 Email GRA salary determination process Salaries are determined by evaluating students' current transcripts using the following criteria: Salaries for graduate students are based on completion of 12 credit hours annually for the first two years of a Master's or PhD graduate program (BS+1, BS+2). Salaries are then based on satisfactory progress (minimum of one credit hour) towards degree after the second year of a Master's degree (MS+0 or degree awarded) or PhD program (BS+3, BS+4, BS+5). Professional salary structure

240

Tseltal clause structure  

E-Print Network (OSTI)

This dissertation examines the syntax of clausal structure in Tseltal (Mayan) with a particular focus on agreement phenomena. The first domain of investigation is the External Possession Construction, in which the clausal ...

Shklovsky, Kirill

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "breakdown structure cbs" 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

Structural Molecular Biology, SSRL  

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

Biological Small Angle X-ray Scattering Workshop The SSRL Structural Molecular Biology Group hosted a 3-day comprehensive workshop on the use of non-crystalline small-angle...

242

Structural Molecular Biology, SSRL  

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

of tRNA synthetase in organisms. Structure of the DUF2233 Domain in Bacteria and the Stuttering-associated UCE Glycoprotein UCE plays a key role in the functioning of lysosomes,...

243

Structural Health Monitoring Tools  

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

Security, LLC 1 LA-CC-10-032 LA-UR 10-01259 1 Introduction to SHMTools SHMTools is a MATLAB package that facilitates the construction of structural health monitoring (SHM)...

244

Relativistic Atomic Structure Calculations  

Science Journals Connector (OSTI)

This review surveys methods for computing the electronic structures of atoms based on the use of relativistic quantum mechanics. The main mathematical formulas are presented with some account of the underlying...

Ian P. Grant

1988-01-01T23:59:59.000Z

245

High Temperature Structural Foam  

Science Journals Connector (OSTI)

The Aerospace Industry is experiencing growing demand for high performance polymer foam. The X-33 program needs structural foam insulation capable of retaining its strength over a wide range of environmental conditions. The High Speed Research Program ...

Weiser Erik S.; Baillif Faye F.; Grimsley Brian W.; Marchello Joseph M.

1998-05-01T23:59:59.000Z

246

Structural traps 5  

SciTech Connect

This book contains studies of oil and gas fields that are mainly structural in nature. Stratigraphy controls the extend of the reservoir in the traps of several fields, but overall, the main trapping features within the group of fields in this volume are structural. Fields covered in this volume include: Endicott Field, Point Arguello Field, West Puerto Chiquito Field, Dukhan Field, Sendji Field, Ruston Field, Raudhatain Field, Hassi Messaoud Field, Snapper Field, Tirrawarra Field, and Sacha Field.

Foster, N.H.; Beaumont, E.A.

1991-01-01T23:59:59.000Z

247

Structured luminescence conversion layer  

DOE Patents (OSTI)

An apparatus device such as a light source is disclosed which has an OLED device and a structured luminescence conversion layer deposited on the substrate or transparent electrode of said OLED device and on the exterior of said OLED device. The structured luminescence conversion layer contains regions such as color-changing and non-color-changing regions with particular shapes arranged in a particular pattern.

Berben, Dirk; Antoniadis, Homer; Jermann, Frank; Krummacher, Benjamin Claus; Von Malm, Norwin; Zachau, Martin

2012-12-11T23:59:59.000Z

248

Chiral Interactions and Structures  

E-Print Network (OSTI)

The chiral structure of liquid crystalline phases arises due to the intrinsic chirality of the constituent mesogens. While it is seemingly straightforward to quantify the macroscopic chirality by using, for instance, the cholesteric pitch or the optical rotatory power, it is not as simple to quantify the chirality of a single molecule. I will discuss a systematic quantification of molecular chirality and show how the resulting chiral parameters may be used to predict macroscopic chiral structure.

Randall D. Kamien

1999-08-19T23:59:59.000Z

249

Structure function monitor  

DOE Patents (OSTI)

Methods and apparatus for a structure function monitor provide for generation of parameters characterizing a refractive medium. In an embodiment, a structure function monitor acquires images of a pupil plane and an image plane and, from these images, retrieves the phase over an aperture, unwraps the retrieved phase, and analyzes the unwrapped retrieved phase. In an embodiment, analysis yields atmospheric parameters measured at spatial scales from zero to the diameter of a telescope used to collect light from a source.

McGraw, John T. (Placitas, NM); Zimmer, Peter C. (Albuquerque, NM); Ackermann, Mark R. (Albuquerque, NM)

2012-01-24T23:59:59.000Z

250

Electronic Structure of Multilayer Graphene  

Science Journals Connector (OSTI)

......Articles Electronic Structure of Multilayer Graphene Hongki Min *) Allan H. MacDonald Department...the electronic structure of multilayer graphene using a pi-orbital continuum model...electronic structure of arbitrarily stacked graphene multilayers consists of chiral pseudospin......

Hongki Min; Allan H. MacDonald

2008-06-01T23:59:59.000Z

251

Structural graphitic carbon foams  

SciTech Connect

Graphitic carbon foams are a unique material form with very high structural and thermal properties at a light weight. A process has been developed to produce microcellular, open-celled graphitic foams. The process includes heating a mesophase pitch preform above the pitch melting temperature in a pressurized reactor. At the appropriate time, the pressure is released, the gas nucleates bubbles, and these bubbles grow forming the pitch into the foam structure. The resultant foamed pitch is then stabilized in an oxygen environment. At this point a rigid structure exists with some mechanical integrity. The foam is then carbonized to 800 C followed by a graphitization to 2700 C. The shear action from the growing bubbles aligns the graphitic planes along the foam struts to provide the ideal structure for good mechanical properties. Some of these properties have been characterized for some of the foam materials. It is known that variations of the blowing temperature, blowing pressure and saturation time result in foams of variously sized with mostly open pores; however, the mechanism of bubble nucleation is not known. Therefore foams were blown with various gases to begin to determine the nucleation method. These gases are comprised of a variety of molecular weights as well as a range of various solubility levels. By examining the resultant structures of the foam, differences were noted to develop an explanation of the foaming mechanism.

Kearns, K.M.; Anderson, H.J. [Air Force Lab., Wright-Patterson AFB, OH (United States). Materials and Mfg. Directorate

1998-12-31T23:59:59.000Z

252

Structure/Function Relationships  

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

Structure/Function Relationships Structure/Function Relationships in Electronic Ceramics Device applications require concurrent optimization of many functional charac- teristics of materials via modifications of their crystal structures using complex chemistry. We found anomalous XAS results on the temperature dependence of the coordination geometry of Ag(Nb,Ta)O3, the only known system that exhibits large, temperature-stable dielectric constants and modest dielectric loss at microwave frequencies. Beamline for Materials Measurement (BMM) Group Leader: Daniel Fischer Proposal Team: D. Fischer, J. Woicik, B. Ravel National Institute of Standards and Technology TECHNIQUES AND CAPABILITIES APPLICATIONS NIST INVESTMENT IN BMM * The mission of BMM is to apply X-ray Absorption Spectroscopy (XAS)

253

Underground waste barrier structure  

DOE Patents (OSTI)

Disclosed is an underground waste barrier structure that consists of waste material, a first container formed of activated carbonaceous material enclosing the waste material, a second container formed of zeolite enclosing the first container, and clay covering the second container. The underground waste barrier structure is constructed by forming a recessed area within the earth, lining the recessed area with a layer of clay, lining the clay with a layer of zeolite, lining the zeolite with a layer of activated carbonaceous material, placing the waste material within the lined recessed area, forming a ceiling over the waste material of a layer of activated carbonaceous material, a layer of zeolite, and a layer of clay, the layers in the ceiling cojoining with the respective layers forming the walls of the structure, and finally, covering the ceiling with earth.

Saha, Anuj J. (Hamburg, NY); Grant, David C. (Gibsonia, PA)

1988-01-01T23:59:59.000Z

254

Structural power flow measurement  

SciTech Connect

Previous investigations of structural power flow through beam-like structures resulted in some unexplained anomalies in the calculated data. In order to develop structural power flow measurement as a viable technique for machine tool design, the causes of these anomalies needed to be found. Once found, techniques for eliminating the errors could be developed. Error sources were found in the experimental apparatus itself as well as in the instrumentation. Although flexural waves are the carriers of power in the experimental apparatus, at some frequencies longitudinal waves were excited which were picked up by the accelerometers and altered power measurements. Errors were found in the phase and gain response of the sensors and amplifiers used for measurement. A transfer function correction technique was employed to compensate for these instrumentation errors.

Falter, K.J.; Keltie, R.F.

1988-12-01T23:59:59.000Z

255

JGI - Organization Structure  

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

Organization Structure Organization Structure clickable organizational chart Dan Rokhsar Genomic Technologies Department Nikos Kyrpides Jeremy Schmutz Plant Program Metagenome Program Igor Grigoriev Fungal Program LBNL Director P. Alivisatos Scientific Advisory Committee JGI Director, Eddy Rubin Deputy Director of Science Programs, Jim Bristow S. Canon NERSC JGI Support Team Ray Turner Operations Department Prokaryote Super Program Genomic Technologies Department Len Pennacchio Microbial Program Tanja Woyke Dan Rokhsar Eukaryote Super Program Susannah Tringe Chia-lin Wei Executive Management DOE JGI Director: Eddy Rubin Deputy of Science: Jim Bristow Deputy of Operations: Ray Turner Deputy of Genomic Technologies: Len Pennacchio Departments Operations Deputy of Operations Ray Turner

256

Structural Biology | Biosciences Division  

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

Membrane Protein Membrane Protein Expression System BIO Home Page About BIO News Releases Research Publications People Contact Us Organization Chart Site Index Inside BIO BIO Safety About Argonne Membrane Protein Engineering Membrane protein expression system The cell membrane serves as the interface between an organism and its environment, and internal membranes in eukaryotes separate functional compartments within cells. Proteins inserted in these membranes carry out many essential biological processes including uptake of nutrients, excretion of wastes, signal transduction, and response to external stimuli. In addition, membrane proteins are used in elaborate bioenergetic schemes to fuel all normal cellular activities in healthy organisms. In this post-genomic era, about 35% of the genes in any genome encode membrane proteins. The fraction of proteins associated with the membrane in eukaryotes may be even higher (up to 40%). Notably, membrane proteins constitute the majority of drug targets, thus knowledge of the structures of these proteins would contribute greatly to our understanding of biological processes. Unfortunately, structural information for membrane proteins is exceedingly scarce. It is notoriously difficult to purify quantities of native material that are sufficient for crystallization attempts. As a result, to date, the three-dimensional structures of ~60 unique transmembrane proteins are known in comparison to the structures of representatives of more than ~4000 soluble protein families.

257

Structuring urban data  

Science Journals Connector (OSTI)

Geometric city modeling is an open problem without standard solutions. Within this problem, there appear several sub-problems that must be faced, like the accurate modeling of streets, buildings and other architectonic structures. One important source ... Keywords: GIS data, Urban data processing, Urban modeling

Oriol Pueyo; Gustavo Patow

2014-02-01T23:59:59.000Z

258

Project Structure Elke Karrenberg  

E-Print Network (OSTI)

Project Structure Elke Karrenberg Project Manager, Head of Personnel Development Phone +49 6131 39-20634 Dr. Jana Leipold Project Staff, Personnel Development Consultant Phone +49 6131 39-25433 Antje Swietlik Project Staff Phone +49 6131 39-20140 Project Office JGU Leadership Forum Universitatis 3, Room 00

Kaus, Boris

259

Designing succinct structural alphabets  

Science Journals Connector (OSTI)

......structural fragments of these segments as ns1,ns2,...,nsp. We need to have a collection...1vk5a 1oyga The first 4 letters is the PDB code. The 5th letter is the chain id, missing...six test proteins are: Protein A (PDB code 1FC2), Homeodomain (1ENH), Protein......

Shuai Cheng Li; Dongbo Bu; Xin Gao; Jinbo Xu; Ming Li

2008-07-01T23:59:59.000Z

260

Magnetism and Atomic Structure  

Science Journals Connector (OSTI)

... the information with regard to the atom has been obtained by studying spectra; chemistry, magnetism, X-ray scattering, etc., play only a subsidiary part. We must admit, ... for fresh sources of information. Much may be said in support of the opinion that magnetism will open a new way by which to approach the study of the structure of ...

P. KAPITZA

1927-06-04T23:59:59.000Z

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


261

Crystal Structure of Ettringite  

Science Journals Connector (OSTI)

... hOhl reflexions with Z = 4n + 2. Comparison of a c-rotation photograph of ettringite with one of thaumasite (from Crestmore, California) showed extremely close resemblances in the ... close resemblances in the intensities of corresponding reflexions, although the reflexions with / odd in ettringite are absent in thaumasite. On this basis, a trial structure was devised for ...

A. MOORE; H. F. W. TAYLOR

1968-06-15T23:59:59.000Z

262

Final Report on "Development and Testing of Advanced Accelerator Structures and Technologies at 11.424 GHz"  

SciTech Connect

This is the final report on the research program ?Development and Testing of Advanced Accelerator Structures and Technologies at 11.424 GHz,? which was carried out by the Naval Research Laboratory (NRL) under Interagency Agreement DE?AI02?01ER41170 with the Department of Energy. The period covered by this report is 15 July 2010 ? 14 July 2013. The program included two principal tasks. Task 1 involved a study of the key physics issues related to the use of high gradient dielectric-loaded accelerating (DLA) structures in rf linear accelerators and was carried out in collaboration with Argonne National Laboratory (ANL) and Euclid Techlabs LLC. Task 2 involved a study of high power active microwave pulse compressors and was carried out in collaboration with Omega-P, Inc. and the Institute of Applied Physics of the Russian Academy of Sciences in Nizhny Novgorod. The studies under Task 1 were focused on rf-induced multipactor and breakdown in externally driven DLA structures at the 200-ns timescale. Suppression of multipactor and breakdown are essential to the practical application of dielectric structures in rf linear accelerators. The structures that were studied were developed by ANL and Euclid Techlabs and their performance was evaluated at high power in the X-band Magnicon Laboratory at NRL. Three structures were designed, fabricated, and tested, and the results analyzed in the first two years of the program: a clamped quartz traveling-wave (TW) structure, a externally copper-coated TW structure, and an externally copper-coated dielectric standing-wave (SW) structure. These structures showed that rf breakdown could be largely eliminated by eliminating dielectric joints in the structures, but that the multipactor loading was omnipresent. In the third year of the program, the focus of the program was on multipactor suppression using a strong applied axial magnetic field, as proposed by Chang et al. [C. Chang et al., J. Appl. Phys. 110, 063304 (2011).], and a successful experiment was carried out that demonstrated suppression of multipactor in the uniform-field region of a TW DLA structure. However, in accordance with theory, the multipactor was enhanced in regions of the structure with lower values of axial magnetic field. Under Task 2, there were two two-month experimental runs at NRL that were used to characterize the performance of high power two-channel dual-mode active microwave pulse compressor configurations that used electron-beam triggered switch cavities. The pulse compressors were designed and fabricated by Omega-P, Inc. and the Russian Institute of Applied Physics and tested in the Magnicon Laboratory at NRL. These pulse compressors made use of an electron beam discharge from a cylindrical knife-edged Mo cathode coated with a CVD diamond film that was driven by a ?100 kV, 100 ns high voltage pulse. The electron beam was used to change the resonant frequency of the switch cavities in order to create the output microwave pulse. The compressor channels included a TE01 input and output section and a TE02 energy storage cavity, followed by a switch assembly that controlled the coupling between the TE01 and TE02 modes. In the initial state, the switch cavity was in resonance, the reflection from the cavity was out of phase, and the mode conversion was only ~2-3%, allowing the energy storage cavity to fill. When the electron beam was discharged into the switch cavity, the cavity was shifted out of resonance, causing the phase of the reflection to change by ~?. As a result of the change in the reflection phase, the mode coupling in the conical taper was greatly increased, and could approach ~100%, permitting the energy storage cavity to empty in one cavity round trip time of the TE02 mode to produce a high power output pulse. The second experiment runs demonstrated a 190 MW, ~20 ns compressed pulse at 25.7 gain and ~50% efficiency, using a 7.4 MW, 1 ?s drive pulse from the magnicon. The success of this experiment suggests a path to future high gain active versions of the SLED 2 pulse compressor at SLAC.

Gold, Steven H. [Naval Research Laboratory

2013-10-13T23:59:59.000Z

263

Structure of the Neutron  

Science Journals Connector (OSTI)

In an earlier paper, the contribution of the meson current to the electromagnetic structure of the nucleon was calculated by use of the dispersion relations for pion-nucleon scattering. Here the contribution of the nucleon current to the electromagnetic structure of the neutron is obtained analogously by use of the dispersion relations for neutron-proton scattering. Only the contribution from the one-pion and two-pion states of nucleon-nucleon scattering is considered. It is found that both states reduce the neutron-electron potential, i.e., leads to a smaller charge radius of the neutron. The contribution from the deuteron state is shown to be negligible. The resulting mean-square radii of the neutron, including the contributions of both meson and nucleon current, are (0.23×10-13cm)2 for the charge distribution and (0.41×10-13cm)2 for the magnetic moment distribution with f2=0.08.

Katsumi Tanaka

1959-01-15T23:59:59.000Z

264

Core assembly storage structure  

DOE Patents (OSTI)

A structure for the storage of core assemblies from a liquid metal-cooled nuclear reactor. The structure comprises an enclosed housing having a substantially flat horizontal top plate, a bottom plate and substantially vertical wall members extending therebetween. A plurality of thimble members extend downwardly through the top plate. Each thimble member is closed at its bottom end and has an open end adjacent said top plate. Each thimble member has a length and diameter greater than that of the core assembly to be stored therein. The housing is provided with an inlet duct for the admission of cooling air and an exhaust duct for the discharge of air therefrom, such that when hot core assemblies are placed in the thimbles, the heat generated will by convection cause air to flow from the inlet duct around the thimbles and out the exhaust duct maintaining the core assemblies at a safe temperature without the necessity of auxiliary powered cooling equipment.

Jones, Jr., Charles E. (Northridge, CA); Brunings, Jay E. (Chatsworth, CA)

1988-01-01T23:59:59.000Z

265

Structure of Vitreous Germania  

Science Journals Connector (OSTI)

A full partial structure factor analysis of vitreous germania has been obtained by a combination of neutron diffraction, x-ray diffraction, and anomalous x-ray scattering. The results are consistent with the identification of the first three peaks in the average neutron and x-ray structure factors with intermediate-range order, chemical short-range order, and topological short-range order, respectively. The values for the shortest distances for the three element pairs are in agreement with previous work and suggest that possible complications with this technique, which might arise for example from shifts of the centers of the electron distributions from the nuclei, are not serious in the case of oxide glasses.

David L. Price; Marie-Louise Saboungi; Adrian C. Barnes

1998-10-12T23:59:59.000Z

266

Controlling Graphene's Electronic Structure  

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

Controlling Graphene's Electronic Structure Print Controlling Graphene's Electronic Structure Print Graphene, because of its unusual electron properties, reduced dimensionality, and scale, has enormous potential for use in ultrafast electronic transistors. It exhibits high conductivity and an anomalous quantum Hall effect (a phenomenon exhibited by certain semiconductor devices at low temperatures and high magnetic fields). Among its novel properties, graphene's electrical charge carriers (electrons and holes) move through a solid with effectively zero mass and constant velocity, like photons. Graphene's intrinsically low scattering rate from defects implies the possibility of a new kind of electronics based on the manipulation of electrons as waves rather than particles. The primary technical difficulty has been controlling the transport of electrical charge carriers through the sheet. This area of research is known as bandgap engineering. While bandgap engineering is the basis of semiconductor technology, it is only now being applied to graphene. Using angle-resolved photoemission spectroscopy (ARPES) at ALS Beamline 7.0.1, a team of scientists from the ALS and Germany characterized the electronic band structure and successfully controlled the gap between valence and conduction bands in a bilayer of graphene thin films deposited on a substrate of silicon carbide. This was done by doping one sheet with adsorbed potassium atoms, creating an asymmetry between the two layers.

267

Structure-Soil-Structure Interaction Effects: Seismic Analysis of Safety-Related Collocated Structures  

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

STRUCTURE-SOIL- STRUCTURE-SOIL- STRUCTURE INTERACTION AT SRS Structural Mechanics - SRS October 25, 2011 1 Objective Determination of Structure Soil Structure Interaction (SSSI) effects, if any between large and more massive Process Building (PB) and Exhaust Fan Building (EFB). Results of the SSSI analysis were compared with those from Soil Structure Interaction (SSI) analysis of the individual buildings, for the following parameters: * In-structure floor response spectra (ISRS) * Transfer functions * Relative displacements for EFB and PB * In-plane- shear from SASSI at EFB wall 2 Building Description 3 The Process Building is a massive reinforced concrete structure supported approximately 40 feet below the finished grade. The PB approximate foundation dimensions are approximately

268

Acoustic Correlates of Information Structure.  

E-Print Network (OSTI)

This paper reports three studies aimed at addressing three questions about the acoustic correlates of information structure in English: (1) do speakers mark information structure prosodically, and, to the extent they do; ...

Breen, Mara

269

Convergent evolution of protein structure  

E-Print Network (OSTI)

Convergent evolution of protein structure prediction and computer chess tournaments: CASP, Kasparov, and CAFASP by N. Siew D. Fischer Predicting the three-dimensional structure of a protein from its amino acid of Structure Prediction) blind prediction experiments aim to assess the prediction capabilities in the field

Fischer, Daniel

270

Amorphous Binary Alloy Structures  

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

Hope Ishii, Sean Brennan and Arthur Bienenstock SSRL/SLAC Hope Ishii, Sean Brennan and Arthur Bienenstock SSRL/SLAC Figure 1: Partial Pair Distribution Functions extracted from the scattering patterns obtained at four different photon energies near the Ge and Mo K-absorption edges. Attempting to determine and describe the atomic arrangements in an amorphous material is a daunting prospect. A considerable advance has been made in the anomalous X-ray scattering approach to determining these arrangements in materials containing two atomic species. Up until the advent of X-ray synchrotron radiation, the X-ray radial distribution function (RDF) method was the most widely used approach for structure analysis of amorphous materials. The RDF is the probability of finding two electrons in a sample separated by a distance r, but with all

271

Structuring product development processes  

Science Journals Connector (OSTI)

This paper proposes operational frameworks for structuring product development processes. The primary objective of this research is to develop procedures to minimize iterations during the development process which adversely affect development time and costs. Several procedures are introduced to restructure the development process. The computation of the corresponding product development times is facilitated by two Markov models addressing different types of learning. The methodologies are employed to identify a set of managerial concerns in restructuring the product development processes. The developed framework has become an integral part of a re-engineering project for the development of rocket engines at Rocketdyne Division of Rockwell International. Throughout the paper, the methodologies are illustrated with the help of this process.

Reza Ahmadi; Thomas A. Roemer; Robert H. Wang

2001-01-01T23:59:59.000Z

272

Electromagnetic structure of pion  

SciTech Connect

In this work, we analyze the electromagnetic structure of the pion, an elementary particle composed by a quark-antiquark bound state, by considering the calculation of its electromagnetic radius and its electromagnetic form factor in low and intermediate energy range. Such observables are determined by means of a theoretical model that takes into account the constituent quark and antiquark of the pion, in the formalism of the light-front field theory. In particular, it is considered a nonsymmetrical vertex for such a model, in which we have calculated the electromagnetic form factor of the pion in an optimized way, by varying its regulator mass, so that we can obtain the best value for the pion electromagnetic radius when compared with the experimental one. The theoretical calculations are also compared with the most recent experimental data involving the pion electromagnetic form factor and the results show very good agreement.

Mello, Clayton S.; Cruz Filho, Jose P.; Da Silva, Edson O.; El-Bennich, Bruno; De Melo, J. P.; Filho, Victo S. [Laboratorio de Fisica Teorica e Computacional (LFTC), Universidade Cruzeiro do Sul, 01506-000, Sao Paulo (Brazil)

2013-03-25T23:59:59.000Z

273

Chapter 6 - Offshore Structural Analysis  

Science Journals Connector (OSTI)

Publisher Summary This chapter discusses the primary considerations that the design engineer should bear in mind during the initial design and subsequent structural analysis. The designer is faced with a large number of rules, codes, standards, and specifications describing the general policy for structural systems and the detailed design of structural components, which includes government requirements, certification/classification authorities, and other technical documents. The notation “Structures” refers to all types of marine units ranging from floating ship-shaped vessels to bottom founded platforms. Emphasis has been placed on ship-shaped structures. Consideration is also given to column-supported structures, e.g., semi-submersibles, tension leg platforms, spars, and mooring buoys, etc., and also to steel bottom founded offshore structures, such as fixed steel jackets. The main output of the planning process is a “Design Basis,” describing the criteria and a “Design Brief,” describing the procedure to be followed and software to be used. This chapter discusses the finite element method, which is a powerful computational tool that has been widely used in the design of complex marine structures over the decades. This chapter gives a general overview for the design of marine structures using a finite element modeling technique. It also addresses structural modeling defined by industry codes for fixed platforms and floating production installations. Throughout this chapter, emphasis is placed on the design process where the finite element analysis will be employed.

Yong Bai

2003-01-01T23:59:59.000Z

274

Natural Prion Structure is Very Different from the Structure...  

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

a beta-helical structure such as has been proposed from electron microscopic and protein folding considerations3. Weak meridional diffraction in some patterns indicated an axial...

275

Dissipative structures and related methods  

DOE Patents (OSTI)

Dissipative structures include at least one panel and a cell structure disposed adjacent to the at least one panel having interconnected cells. A deformable material, which may comprise at least one hydrogel, is disposed within at least one interconnected cell proximate to the at least one panel. Dissipative structures may also include a cell structure having interconnected cells formed by wall elements. The wall elements may include a mesh formed by overlapping fibers having apertures formed therebetween. The apertures may form passageways between the interconnected cells. Methods of dissipating a force include disposing at least one hydrogel in a cell structure proximate to at least one panel, applying a force to the at least one panel, and forcing at least a portion of the at least one hydrogel through apertures formed in the cell structure.

Langhorst, Benjamin R; Chu, Henry S

2013-11-05T23:59:59.000Z

276

Seventh BES (Basic Energy Sciences) catalysis and surface chemistry research conference  

SciTech Connect

Research programs on catalysis and surface chemistry are presented. A total of fifty-seven topics are included. Areas of research include heterogeneous catalysis; catalysis in hydrogenation, desulfurization, gasification, and redox reactions; studies of surface properties and surface active sites; catalyst supports; chemical activation, deactivation; selectivity, chemical preparation; molecular structure studies; sorption and dissociation. Individual projects are processed separately for the data bases. (CBS)

Not Available

1990-03-01T23:59:59.000Z

277

Solar structure without computers  

Science Journals Connector (OSTI)

We derive succinctly the equations of solar structure. We first present models of objects in hydrostatic equilibrium that fail as models of the sun in order to illustrate important physical requirements. Then by arguing physically that the pressure gradient can be matched to the simple function d P/d r=?k r e ?(r/a)2 we derive a complete analytic representation of the solar interior in terms of a one?parameter family of models. Two different conditions are then used to select the appropriate value of the parameter specifying the best model within the family: (1) the solar luminosity is equated to the thermonuclear power generated near the center and/or (2) the solar luminosity is equated to the radiative diffusion of energy from a central region. The two methods of selecting the parameter agree to within a few percent. The central conditions of the sun are well calculated by these analytic formulas all without aid of a computer. This is an original treatment yielding much the best description of the solar center to be found by methods of differential and integral calculus rendering it an excellent laboratory for applied calculus.

Donald D. Clayton

1986-01-01T23:59:59.000Z

278

Appendix C Conducting Structured Walkthroughs  

Directives, Delegations, and Requirements

This guide describes how to conduct a structured walkthroughs during the lifecycle stages of software engineering projects, regardless of hardware platform.

1997-05-21T23:59:59.000Z

279

Magnetic cellulose-derivative structures  

DOE Patents (OSTI)

Structures to serve as selective magnetic sorbents are formed by dissolving a cellulose derivative such as cellulose triacetate in a solvent containing magnetic particles. The resulting solution is sprayed as a fine mist into a chamber containing a liquid coagulant such as n-hexane in which the cellulose derivative is insoluble but in which the coagulant is soluble or miscible. On contact with the coagulant, the mist forms free-flowing porous magnetic microspheric structures. These structures act as containers for the ion-selective or organic-selective sorption agent of choice. Some sorption agents can be incorporated during the manufacture of the structure. 3 figs.

Walsh, M.A.; Morris, R.S.

1986-09-16T23:59:59.000Z

280

Magnetic cellulose-derivative structures  

DOE Patents (OSTI)

Structures to serve as selective magnetic sorbents are formed by dissolving a cellulose derivative such as cellulose triacetate in a solvent containing magnetic particles. The resulting solution is sprayed as a fine mist into a chamber containing a liquid coagulant such as n-hexane in which the cellulose derivative is insoluble but in which the coagulant is soluble or miscible. On contact with the coagulant, the mist forms free-flowing porous magnetic microspheric structures. These structures act as containers for the ion-selective or organic-selective sorption agent of choice. Some sorbtion agents can be incorporated during the manufacture of the structure.

Walsh, Myles A. (Falmouth, MA); Morris, Robert S. (Fairhaven, MA)

1986-09-16T23:59:59.000Z

Note: This page contains sample records for the topic "breakdown structure cbs" 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

Future Applications Monitor Critical Structures  

E-Print Network (OSTI)

Future Applications · Monitor Critical Structures ­ Bridges, dams, pipelines, power integrity for rescue efforts ­ Expendable for unstable conditions ­ Power system repair ­ Firefighting

Huston, Dryver R.

282

Quasicrystalline structures and uses thereof  

DOE Patents (OSTI)

This invention relates generally to the field of quasicrystalline structures. In preferred embodiments, the stopgap structure is more spherically symmetric than periodic structures facilitating the formation of stopgaps in nearly all directions because of higher rotational symmetries. More particularly, the invention relates to the use of quasicrystalline structures for optical, mechanical, electrical and magnetic purposes. In some embodiments, the invention relates to manipulating, controlling, modulating and directing waves including electromagnetic, sound, spin, and surface waves, for a pre-selected range of wavelengths propagating in multiple directions.

Steinhardt, Paul Joseph (Princeton, NJ); Chaikin, Paul Michael (New York, NY); Man, Weining (San Francisco, CA)

2011-11-22T23:59:59.000Z

283

Nano dispersion amplified waveguide structures  

Science Journals Connector (OSTI)

A highly dispersive waveguide structure is proposed tocefficiently compress and expand ultra short pulses in a package forming a sufficiently small footprint. A sub-wavelength...

Brown, J; Johnson, Eric; Moharam, M

2004-01-01T23:59:59.000Z

284

Glass as a structural material.  

E-Print Network (OSTI)

??Glass can be beautiful and strong, so why is it not used more often as a structural material? Most often the reasoning is because people… (more)

White, Rachel Lynn

2007-01-01T23:59:59.000Z

285

Magnetism and Atomic Structure. I  

Science Journals Connector (OSTI)

3 January 1921 research-article Magnetism and Atomic Structure. I A. E. Oxley The Royal Society is collaborating with JSTOR to digitize, preserve, and extend access...

1921-01-01T23:59:59.000Z

286

Controlling Structures | Open Energy Information  

Open Energy Info (EERE)

Controlling Structures Controlling Structures Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Controlling Structures Dictionary.png Controlling Structures: No definition has been provided for this term. Add a Definition Structure Description Associated Topography Tectonic Setting Major Normal Fault Normal faults are structures in which the hanging wall is down dropped along the fault plane relative to the foot wall. They are the predominant type of structure in extensional tectonic environments, but are commonly encountered in a number of geologic settings. Major range front faults account for 3% of structural controls in the Great Basin. Mountainous, Horst and Graben Extensional Tectonics, Rift Zone Termination of a Major Normal Fault Major normal faults sometimes terminate into multiple horsetailing splays that result in increased hydrothermal fluid flux. As of 2011, 22% of all known Basin & Range structures hosting geothermal systems occur at normal fault terminations or tip-lines with multiple closely-spaced faults that enhance permeability. Mountainous, Horst and Graben Extensional Tectonics, Rift Zone

287

CHAPTER 3. STRUCTURE OF MAGNETIC FIELDS 1 Structure of Magnetic  

E-Print Network (OSTI)

CHAPTER 3. STRUCTURE OF MAGNETIC FIELDS 1 Chapter 3 Structure of Magnetic Fields Many of the most interesting plasmas are permeated by or imbedded in magnetic fields.1 As shown in Fig. 3.1, the magnetic field properties of magnetic fields in plasmas can be discussed without specifying a model for the plasma

Callen, James D.

288

Structurally assisted blackness in butterfly scales  

Science Journals Connector (OSTI)

...research-article Structurally assisted blackness in butterfly scales...photonic structure| Structurally assisted blackness in butterfly scales...ultrastructure Structurally assisted blackness in butterfly scales...Controlled absorption of incident solar radiation is the principal...

2004-01-01T23:59:59.000Z

289

Combustible structural composites and methods of forming combustible structural composites  

DOE Patents (OSTI)

Combustible structural composites and methods of forming same are disclosed. In an embodiment, a combustible structural composite includes combustible material comprising a fuel metal and a metal oxide. The fuel metal is present in the combustible material at a weight ratio from 1:9 to 1:1 of the fuel metal to the metal oxide. The fuel metal and the metal oxide are capable of exothermically reacting upon application of energy at or above a threshold value to support self-sustaining combustion of the combustible material within the combustible structural composite. Structural-reinforcing fibers are present in the composite at a weight ratio from 1:20 to 10:1 of the structural-reinforcing fibers to the combustible material. Other embodiments and aspects are disclosed.

Daniels, Michael A.; Heaps, Ronald J.; Steffler, Eric D.; Swank, W. David

2013-04-02T23:59:59.000Z

290

Combustible structural composites and methods of forming combustible structural composites  

DOE Patents (OSTI)

Combustible structural composites and methods of forming same are disclosed. In an embodiment, a combustible structural composite includes combustible material comprising a fuel metal and a metal oxide. The fuel metal is present in the combustible material at a weight ratio from 1:9 to 1:1 of the fuel metal to the metal oxide. The fuel metal and the metal oxide are capable of exothermically reacting upon application of energy at or above a threshold value to support self-sustaining combustion of the combustible material within the combustible structural composite. Structural-reinforcing fibers are present in the composite at a weight ratio from 1:20 to 10:1 of the structural-reinforcing fibers to the combustible material. Other embodiments and aspects are disclosed.

Daniels, Michael A. (Idaho Falls, ID); Heaps, Ronald J. (Idaho Falls, ID); Steffler, Eric D (Idaho Falls, ID); Swank, William D. (Idaho Falls, ID)

2011-08-30T23:59:59.000Z

291

Synthesis, Structure and Dehydrogenation of Magnesium Amidoborane...  

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

Synthesis, Structure and Dehydrogenation of Magnesium Amidoborane Monoammoniate. Synthesis, Structure and Dehydrogenation of Magnesium Amidoborane Monoammoniate. Abstract:...

292

Structural Characterization of Li  

SciTech Connect

Pristine Li{sub 1-z-x}Ni{sub 1+z}O{sub 2} (z=0.02, 0.07, and 0.25) and deintercalated Li{sub x}Ni{sub 1.02}O{sub 2} (x=0.82 and 0.63) phases were characterized by neutron diffraction. In all cases, the amount of nickel in the lithium sites was found to be identical to that deduced from X-ray diffraction experiments. The sensitivity of the neutron studies allowed us to show that no lithium ions are in the NiO{sub 2} slabs for z=0.02 and 0.07. A Li/Ni mixing appears only for the most lithium-deficient phase leading to the [Li{sub 0.73}Ni{sub 0.27}]{sub 3b}[Ni{sub 0.98}Li{sub 0.02}]{sub 3a}O{sub 2} cationic distribution for the Li{sub 0.75}Ni{sub 1.25}O{sub 2} phase. Determination of the anisotropic atomic displacement parameters confirms the results previously obtained from EXAFS data. The structural characterization of partially deintercalated phases was in good agreement with the XRD analysis. However, in the case of Li{sub 0.63}Ni{sub 1.02}O{sub 2}, it gave evidence for the presence of a small amount of rhombohedral phase due to fluctuations in the composition of the starting material.

Pouillerie, C.; Suard, E.; Delmas, C.

2001-05-01T23:59:59.000Z

293

Spatial Data Structures Hanan Samet  

E-Print Network (OSTI)

Spatial Data Structures Hanan Samet Computer Science Department and Institute of Advanced Computer An overview is presented of the use of spatial data structures in spatial databases. The focus to the space occupied by it. Such techniques are known as spatial indexing methods. Hierarchical data

Shahabi, Cyrus

294

Dynamic structural analysis for DAEs  

Science Journals Connector (OSTI)

Efficient simulation of higher-index variable-structure DAE requires index-reduction during simulation. Hence, the performance of the implemented index-reduction method is crucial. When the same algorithm has to be calculated for slightly different inputs, ... Keywords: DAE, hybrid system, index reduction, structural variability

Christoph Höger

2014-07-01T23:59:59.000Z

295

Structure and function of human cytochromes P450 enzymes: Xenobiotic metabolism by CYP2A and steroid biosynthesis by CYP17A1  

E-Print Network (OSTI)

Cytochrome P450 (CYP) is a superfamily of heme-containing enzymes that have roles in the breakdown or synthesis of steroids, fatty acids, vitamins, and eicosanoids. They are also the main family of enzymes involved in the ...

DeVore, Natasha M.

2011-05-31T23:59:59.000Z

296

Thermal transfer structures coupling electronics card(s) to coolant-cooled structure(s)  

DOE Patents (OSTI)

Cooling apparatuses and coolant-cooled electronic systems are provided which include thermal transfer structures configured to engage with a spring force one or more electronics cards with docking of the electronics card(s) within a respective socket(s) of the electronic system. A thermal transfer structure of the cooling apparatus includes a thermal spreader having a first thermal conduction surface, and a thermally conductive spring assembly coupled to the conduction surface of the thermal spreader and positioned and configured to reside between and physically couple a first surface of an electronics card to the first surface of the thermal spreader with docking of the electronics card within a socket of the electronic system. The thermal transfer structure is, in one embodiment, metallurgically bonded to a coolant-cooled structure and facilitates transfer of heat from the electronics card to coolant flowing through the coolant-cooled structure.

David, Milnes P; Graybill, David P; Iyengar, Madhusudan K; Kamath, Vinod; Kochuparambil, Bejoy J; Parida, Pritish R; Schmidt, Roger R

2014-12-16T23:59:59.000Z

297

The structure of nickel clusters  

SciTech Connect

The reactions of nickel clusters with ammonia and with water are used to probe cluster geometrical structure. Ammonia uptake experiments allow the determination of the number of preferred binding sites on cluster surfaces. This number shows pronounced minima in the 50- to 116- atom size range for many of the cluster sizes that appear as magic numbers in mass spectra of rare gas clusters. Since these magic numbers arise from closings of shells and subshells of the Mackay icosahedra, the correlation suggests that ammoniated nickel clusters in this size region also have icosahedral structure. Similar structure is found for ammoniated clusters smaller than {similar to}30 atoms, but is not seen for room temperature clusters in the vicinity of the third shell closing at 147 atoms. Icosahedral features do appear for the larger clusters at elevated temperatures. For many clusters above 50 atoms, prolonged exposure to ammonia causes a conversion from the icosahedral structure to some other structure that binds more ammonia molecules, and often the two structures are seen together. The equilibrium reaction of a single water molecule with the bare clusters probes the strength of the cluster--water bond. Enhanced water adsorption is often seen for clusters one atom larger than those showing minima in ammonia uptake, suggesting that these bare clusters likewise have icosahedral structure. The reasons for minima in ammonia uptake and maxima in water binding are discussed.

Parks, E.K.; Winter, B.J.; Klots, T.D.; Riley, S.J. (Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439 (US))

1991-02-01T23:59:59.000Z

298

Structure and thermoplasticity of coal  

SciTech Connect

Chapters cover: molecular structure and thermoplastic properties of coal; {sup 1}H-nmr study of relaxation mechanisms of coal aggregate; structural changes of coal macromolecules during softening; quantitative estimation of metaplsat in heat-treated coal by solvent extraction; effects of surface oxidation on thermoplastic properties of coal; analysis of dilatation and contraction of coal during carbonization; formation mechanisms of coke texture during resolidification; modified CPD model for coal devolatilization; mathematical modelling of coke mechanical structure; and simulating particulate dynamics in the carbonization process based on discrete element treatment.

Komaki, I.; Itagaki, S.; Miura, T. (eds.)

2004-07-01T23:59:59.000Z

299

CABM Symposium Applications of NMR to structure-based drug design in structural  

E-Print Network (OSTI)

CABM Symposium Applications of NMR to structure-based drug design in structural genomics Robert, structure-based drug design, structural genomics Abstract Structural genomics is poised to have a tremendous design in the era of structural genomics. Introduction Structure-based drug design has established itself

Powers, Robert

300

Electronic structure of superconductivity refined  

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

Electronic structure of superconductivity refined Electronic structure of superconductivity refined Electronic structure of superconductivity refined A team of physicists propose a new model that expands on a little understood aspect of the electronic structure in high-temperature superconductors. July 10, 2008 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials. Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials.

Note: This page contains sample records for the topic "breakdown structure cbs" 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

Did 1998 Reflect Structural Change?  

Gasoline and Diesel Fuel Update (EIA)

Did 1998 Reflect Structural Change? Did 1998 Reflect Structural Change? 5/17/99 Click here to start Table of Contents PPT Slide Did 1998 Reflect Structural Change? Demand U.S. Propane Demand Sectors (1996) PPT Slide 1998 Propane Prices Fell with Crude Oil PPT Slide Warm Weather Behind Demand Decline 1998 Warm Weather Kept Demand Down Supply Propane Production Fell in 1998 1998 Propane Net Imports Increased Algeria Was Major Source of ‘98 Import Increase U.S. Chemical Use & Large Storage Attracts Excess Propane Petroleum & Propane Market Over Supply Average Stock Levels: Crude Market & Propane Futures Market Incentives to Build Petroleum Stocks New “Structure” or Cycle? Near-Term Future Large January Draw Did Not Remove Excess How Might Excess Stocks Decline? Near Term U.S. Propane Production

302

The structure of trititanate nanotubes  

Science Journals Connector (OSTI)

Combining information from X-ray diffraction, selected-area electron diffraction, high-resolution transmission electron microscopy and image simulation, a structural model is derived for trititanate nanotubes.

Chen, Q.

2002-07-30T23:59:59.000Z

303

Scott Sanner Data Structures for  

E-Print Network (OSTI)

Scott Sanner Data Structures for Efficient Inference and Optimization Ehsan Abbasnejad Zahra Zamani · D: true distance to wall · x1, ..., xn: measurements · want: E[D | x1,...,xn] #12;Bayesian Robotics

Sanner, Scott

304

Structure Determination of Echovirus 1  

Science Journals Connector (OSTI)

In the structure determination of echovirus 1, subtle interactions between crystallographic and non-crystallographic symmetries caused the space group to be ambiguous, but also allowed significant short cuts in the molecular-replacement calculations.

Filman, D.J.

1998-11-01T23:59:59.000Z

305

Structure determination of porcine haemoglobin  

Science Journals Connector (OSTI)

To investigate a potential candidate material for making artificial red blood cells for supplement blood transfusion, the crystal structure of porcine haemoglobin was determined up to 1.8 ? resolution.

Lu, T.-H.

2000-03-01T23:59:59.000Z

306

Offshore Structure Design and Development  

Science Journals Connector (OSTI)

...installation and operation of offshore structures for oil and gas exploration and production...service. The importance of offshore oil and gas may be judged by the...exploration investments will go to offshore prospects in future years...

1982-01-01T23:59:59.000Z

307

Novel hollow powder porous structures  

SciTech Connect

Recent finite element calculations indicate that structures constructed from partially compacted hollow spheres exhibit a greater stiffness and strength than many other cellular structures at comparable density. It has been observed that gas atomization of metallic powders often leads to entrapment of the flow field gas. The resulting hollow powders are an unwanted by-product in the sense that they lead to porosity and future sites of defect in solid parts. Here a method is developed to separate the hollow powders according to their size, shape and density. They are then consolidated to a porous structure. Examples of this are given for both a titanium alloy and a nickel-base superalloy. The compressive mechanical properties are measured and compared to those of other porous structures.

Sypeck, D.J.; Parrish, P.A.; Wadley, H.N.G. [Univ. of Virginia, Charlottesville, VA (United States). School of Engineering and Applied Science

1998-12-31T23:59:59.000Z

308

Fracture of aluminum naval structures  

E-Print Network (OSTI)

Structural catastrophic failure of naval vessels due to extreme loads such as underwater or air explosion, high velocity impact (torpedoes), or hydrodynamic loads (high speed vessels) is primarily caused by fracture. ...

Galanis, Konstantinos, 1970-

2007-01-01T23:59:59.000Z

309

Fundamentals of Structural Reliability Theory  

Science Journals Connector (OSTI)

Structural reliability analysis differs in many important ways from reliability analysis as practised in, for example, the electronics and aero-space industries, in spite of the fact that the underlying probab...

Palle Thoft-Christensen Ph. D.…

1982-01-01T23:59:59.000Z

310

Structural materials for fusion reactors  

Science Journals Connector (OSTI)

Fusion Reactors will require specially engineered structural materials, which ... on safety considerations. The fundamental differences between fusion and other nuclear reactors arise due to the 14MeV neutronics ...

P. M. Raole; S. P. Deshpande

2009-04-01T23:59:59.000Z

311

Wavelets in electronic structure calculations  

Science Journals Connector (OSTI)

A three-dimensional wavelet analysis is employed to develop a new formalism for electronic structure calculations. The wavelet formalism provides a systematically improvable and tractable description of electronic wave functions and overcomes limitations of conventional basis expansions. The potential power of the wavelet formalism for ab initio electronic structure calculations is demonstrated by a calculation of 1s states for all the naturally occurring nuclei on the periodic table and the interaction energies of the hydrogen molecule ion.

K. Cho, T. A. Arias, J. D. Joannopoulos, and Pui K. Lam

1993-09-20T23:59:59.000Z

312

Laser Induced Breakdown Spectroscopy and Applications Toward Thin Film Analysis  

E-Print Network (OSTI)

1.5 Laserb) 60 shots, (c) 80 shots, and (d) 100 shots with 60mJ laserAutofocusing . . . . . . . . . . 2.4 Laser and Spectrometer

Owens, Travis Nathan

2011-01-01T23:59:59.000Z

313

Mitigating Breakdown in High Energy Density Perovskite Polymer Nanocomposite Capacitors  

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

2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

314

Aerosol measurements with laser-induced breakdown spectroscopy  

E-Print Network (OSTI)

monitoring with an atmospheric microwave-plasma having aMonitoring with an Atmospheric Microwave-Plasma Having abased on an atmospheric microwave plasma are underway by

Lithgow, Gregg Arthur

2007-01-01T23:59:59.000Z

315

Breakdown of self-organized criticality in sandpiles  

Science Journals Connector (OSTI)

We introduce two sandpile models which show the same behavior of real sandpiles, that is, an almost self-organized critical behavior for small systems and a dominance of large avalanches as the system size increases. The systems become fully self-organized critical, with the critical exponents of the Bak, Tank, and Wiesenfeld model [P. Bak, C. Tang, and K. Wiesenfeld, Phys. Rev. Lett. 59, 381 (1987)] as the system parameters are changed, showing that they can make a bridge between the well known theoretical and numerical results and what is observed in real experiments.

Maria de Sousa Vieira

2002-11-20T23:59:59.000Z

316

Hydraulic drill string breakdown and bleed off unit  

SciTech Connect

An apparatus is described for use within an oil well rig for decoupling a tubing string into pipe segments comprising, in combination: rotary tong means for applying an unthreading torque to a first, upper pipe segment within the tubing string; torque resisting means for securing a second, lower pipe segment within the tubing string against the unthreading torque; containing means, intermediate the rotary tong means and the torque resisting means, enclosing a threaded joint of the tubing string, adapted for containing pressurized gases, liquids, and particulates, released from the threaded joint upon the decoupling; fluid communicating means for allowing fluid communication between the containing means and a receiving point adapted for receiving the pressurized gases, liquids, and particulates; means for moving the rotary tong means, the torque resisting means and the containing means between a closed, engaging position with the tubing string and an open position; and means for horizontally moving the rotary tong means, the torque resisting means and the containing means between a position adjacent the tubing string and a position away from the tubing string.

Zeringue, F.J. Jr.

1987-02-17T23:59:59.000Z

317

Qualitative breakdown of the unrestricted Hartree-Fock energy  

E-Print Network (OSTI)

The stretching of closed-shell molecules is a qualitative problem for restricted Hartree-Fock that is usually circumvented by the use of unrestricted Hartree-Fock (UHF). UHF is well known to break the spin symmetry at the Coulson-Fischer point, leading to a discontinuous derivative in the potential energy surface and incorrect spin density. However, this is generally not considered as a major drawback. In this work, we present a set of two electron molecules which magnify the problem of symmetry breaking and lead to drastically incorrect potential energy surfaces with UHF. These molecules also fail with unrestricted density-functional calculations where a functional such as B3LYP gives both symmetry breaking and an unphysically low energy due to the delocalization error. The implications for density functional theory are also discussed.

Mori-Sánchez, Paula

2014-01-01T23:59:59.000Z

318

Aerosol measurements with laser-induced breakdown spectroscopy  

E-Print Network (OSTI)

fused silica lenses to focus the plasma emission onto a UVideal lens focuses light from the plasma onto the tip of anboth focus the laser pulse and collect the plasma emission

Lithgow, Gregg Arthur

2007-01-01T23:59:59.000Z

319

Coordination Breakdowns and Their Impact on Development Productivity and  

E-Print Network (OSTI)

coordinating the effort of many individuals across the multiple stages of the development process. In software in a reduction of work dependencies between teams developing interdependent modules. Although that research stream has been quite influential, it considers a static view of the problem of coordination

Herbsleb, James D.

320

Cascading Breakdown on Weighted Scale-Free Complex Networks  

Science Journals Connector (OSTI)

......In a power transmission grid, for...electrical line in southern...represents data packets and...macroscopic outages with a finite...In power transmission network, for...networks. Transmission lines (links) between......

Wei Huang; Chunguang Li

2007-07-01T23:59:59.000Z

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


321

Languages and semantics of grammatical discrete structures  

Science Journals Connector (OSTI)

Applying grammatical formalisms to engineering problems requires consideration of spatial, functional, and behavioral design attributes. This paper explores structural design languages and semantics for the generation of feasible and purposeful discrete ... Keywords: Design Languages, Engineering Grammars, Structural Layout, Structural Semantics

Kristina Shea; Jonathan Cagan

1999-09-01T23:59:59.000Z

322

Analysis of deployable strut roof structures  

E-Print Network (OSTI)

Deployable structures are structures that can change shape from a compact to an expanded form. Thus, their advantage over conventional structures is adaptability, whether in the sense of adapting to changing environmental ...

Wolfe, Maxwell H. (Maxwell Henry)

2013-01-01T23:59:59.000Z

323

NONLINEAR APPROXIMATIONS FOR ELECTRONIC STRUCTURE CALCULATIONS  

E-Print Network (OSTI)

NONLINEAR APPROXIMATIONS FOR ELECTRONIC STRUCTURE CALCULATIONS G. BEYLKIN AND T. S. HAUT Abstract. We present a new method for electronic structure calculations based on novel algorithms for nonlinear numerical calculus suitable for electronic structure calculations. For any spatial orbital

Beylkin, Gregory

324

Multilevel domain decomposition for electronic structure calculations  

E-Print Network (OSTI)

Multilevel domain decomposition for electronic structure calculations M. Barrault a,b,*, E. Cance method (MDD) for electronic structure calculations within semi- empirical and density functional theory electronic structure calculations A molecular system is composed of N electrons, modelled quantum

Hager, William

325

Structural basis of spectrin elasticity  

SciTech Connect

A new model of human erythrocyte {alpha}-spectrin is proposed. The secondary structure of human erythrocyte {alpha}-spectrin and its folding into a condensed structure that can convert reversibly in situ, into an elongated configuration is predicted from its deduced protein sequence. Results from conformational and amphipathicity analyses suggest that {alpha}-spectrin consists mainly of short amphipathicity helices interconnected by flexible turns and/or coils. The distribution of charges and amphipathicity of the helices can facilitate their folding into stable domains of 4 and 3 helices surrounding a hydrophobic core. The association between adjacent four- and three-helix domains further organize them into recurring seven-helix motifs that might constitute the basic structural units of the extended {alpha}-spectrin. The elongated spectrin molecule packs, in a sinusoidal fashion, through interactions between neighboring motifs into a compact structure. We suggest that the reversible extension and contraction of this sigmoidally packed structure is the molecular basis of the mechanism by which spectrin contributes to the elasticity of the red cell membrane.

Shen, B.W.; Stevens, F.J.; Luthi, U. [Argonne National Lab., IL (United States); Goldin, S.B. [Illinois Univ., Chicago, IL (United States). Dept. of Biological Chemistry

1991-10-17T23:59:59.000Z

326

Method Of Transferring Strained Semiconductor Structures  

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

Of Transferring Strained Semiconductor Structures Of Transferring Strained Semiconductor Structures Method Of Transferring Strained Semiconductor Structures The transfer of strained semiconductor layers from one substrate to another substrate involves depositing a multilayer structure on a substrate having surface contaminants. June 25, 2013 Method Of Transferring Strained Semiconductor Structures The transfer of strained semiconductor layers from one substrate to another substrate involves depositing a multilayer structure on a substrate having surface contaminants. Available for thumbnail of Feynman Center (505) 665-9090 Email Method Of Transferring Strained Semiconductor Structures The transfer of strained semiconductor layers from one substrate to another substrate involves depositing a multilayer structure on a substrate having

327

Facile synthesized nanorod structured vanadium pentoxide for...  

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

synthesized nanorod structured vanadium pentoxide for high-rate lithium batteries. Facile synthesized nanorod structured vanadium pentoxide for high-rate lithium batteries....

328

Investigations of Structure and Metabolism within Shewanella...  

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

of Structure and Metabolism within Shewanella oneidensis MR-1 Biofilms . Investigations of Structure and Metabolism within Shewanella oneidensis MR-1 Biofilms . Abstract: Biofilms...

329

Challenges and opportunities for structural DNA nanotechnology  

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

Challenges and opportunities for structural DNA nanotechnology Authors: Pinheiro, A. V., Han, D., Shih, W. M., and Yan, H. Title: Challenges and opportunities for structural DNA...

330

Solar Decathlon Technology Spotlight: Structural Insulated Panels...  

Energy Savers (EERE)

Solar Decathlon Technology Spotlight: Structural Insulated Panels Solar Decathlon Technology Spotlight: Structural Insulated Panels September 20, 2011 - 7:13am Addthis These...

331

Transparant ductility: Reinforcing a structural glass girder:.  

E-Print Network (OSTI)

??Transparency and light are hot items in building design and massive structural elements often form an unwelcome necessity for architects. The structural use of glass… (more)

Rademakers, M.

2009-01-01T23:59:59.000Z

332

Hybrid Rotaxanes: Interlocked Structures for Quantum Computing...  

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

Hybrid Rotaxanes: Interlocked Structures for Quantum Computing? Hybrid Rotaxanes: Interlocked Structures for Quantum Computing? Print Wednesday, 26 August 2009 00:00 Rotaxanes are...

333

Structure of Synaptic Connectors Solved  

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

Structure of Synaptic Connectors Solved Print Structure of Synaptic Connectors Solved Print Establishment of neural connections at specialized intercellular junctions called synapses is critical for proper brain function, and errors in the process are thought to be associated with autism and other disorders. Researchers from Stanford University and the University of Texas Southwestern Medical Center have reported high-resolution, three-dimensional structures of the proteins, called neuroligin-1 and neurexin-1β, that form this connection. Because mutations in the neurexin and neuroligin genes are among the multiple genetic causes of autism, understanding the molecular mechanism of these proteins in synapse development is a first step towards development of novel therapeutics directed to treat and possibly cure autism.

334

Structure of Synaptic Connectors Solved  

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

Structure of Synaptic Connectors Solved Print Structure of Synaptic Connectors Solved Print Establishment of neural connections at specialized intercellular junctions called synapses is critical for proper brain function, and errors in the process are thought to be associated with autism and other disorders. Researchers from Stanford University and the University of Texas Southwestern Medical Center have reported high-resolution, three-dimensional structures of the proteins, called neuroligin-1 and neurexin-1β, that form this connection. Because mutations in the neurexin and neuroligin genes are among the multiple genetic causes of autism, understanding the molecular mechanism of these proteins in synapse development is a first step towards development of novel therapeutics directed to treat and possibly cure autism.

335

Collective network for computer structures  

DOE Patents (OSTI)

A system and method for enabling high-speed, low-latency global collective communications among interconnected processing nodes. The global collective network optimally enables collective reduction operations to be performed during parallel algorithm operations executing in a computer structure having a plurality of the interconnected processing nodes. Router devices ate included that interconnect the nodes of the network via links to facilitate performance of low-latency global processing operations at nodes of the virtual network and class structures. The global collective network may be configured to provide global barrier and interrupt functionality in asynchronous or synchronized manner. When implemented in a massively-parallel supercomputing structure, the global collective network is physically and logically partitionable according to needs of a processing algorithm.

Blumrich, Matthias A. (Ridgefield, CT); Coteus, Paul W. (Yorktown Heights, NY); Chen, Dong (Croton On Hudson, NY); Gara, Alan (Mount Kisco, NY); Giampapa, Mark E. (Irvington, NY); Heidelberger, Philip (Cortlandt Manor, NY); Hoenicke, Dirk (Ossining, NY); Takken, Todd E. (Brewster, NY); Steinmacher-Burow, Burkhard D. (Wernau, DE); Vranas, Pavlos M. (Bedford Hills, NY)

2011-08-16T23:59:59.000Z

336

Relativisticlike structure of classical thermodynamics  

E-Print Network (OSTI)

We analyze in the context of geometrothermodynamics a Legendre invariant metric structure in the equilibrium space of an ideal gas. We introduce the concept of thermodynamic geodesic as a succession of points, each corresponding to a state of equilibrium, so that the resulting curve represents a quasi-static process. A rigorous geometric structure is derived in which the thermodynamic geodesics at a given point split the equilibrium space into two disconnected regions separated by adiabatic geodesics. This resembles the causal structure of special relativity, which we use to introduce the concept of adiabatic cone for thermodynamic systems. This result might be interpreted as an alternative indication of the inter-relationship between relativistic physics and classical thermodynamics.

Hernando Quevedo; Alberto Sanchez; Alejandro Vazquez

2008-11-03T23:59:59.000Z

337

Structure of Synaptic Connectors Solved  

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

Structure of Synaptic Connectors Solved Print Structure of Synaptic Connectors Solved Print Establishment of neural connections at specialized intercellular junctions called synapses is critical for proper brain function, and errors in the process are thought to be associated with autism and other disorders. Researchers from Stanford University and the University of Texas Southwestern Medical Center have reported high-resolution, three-dimensional structures of the proteins, called neuroligin-1 and neurexin-1β, that form this connection. Because mutations in the neurexin and neuroligin genes are among the multiple genetic causes of autism, understanding the molecular mechanism of these proteins in synapse development is a first step towards development of novel therapeutics directed to treat and possibly cure autism.

338

proteinsSTRUCTURE O FUNCTION O BIOINFORMATICS STRUCTURE NOTE  

E-Print Network (OSTI)

, Argonne National Laboratory, Illinois 60439 Key words: nuclear pore complex; Nup133; structural genomics of Saccharomyces cerevisiae Nup133, a component of the nuclear pore complex Parthasarathy Sampathkumar,1* Tarun. INTRODUCTION Nuclear pore complexes (NPCs) are situated at the interface of the inner and outer nuclear

Sali, Andrej

339

DNA attachment to support structures  

SciTech Connect

Microscopic beads or other structures are attached to nucleic acids (DNA) using a terminal transferase. The transferase adds labeled dideoxy nucleotide bases to the ends of linear strands of DNA. The labels, such as the antigens digoxigenin and biotin, bind to the antibody compounds or other appropriate complementary ligands, which are bound to the microscopic beads or other support structures. The method does not require the synthesis of a synthetic oligonucleotide probe. The method can be used to tag or label DNA even when the DNA has an unknown sequence, has blunt ends, or is a very large fragment (e.g., >500 kilobase pairs).

Balhorn, Rodney L. (Livermore, CA); Barry, Christopher H. (Fresno, CA)

2002-01-01T23:59:59.000Z

340

Loop shaping of structural dynamics  

E-Print Network (OSTI)

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

Kim, Byeong Hwa

1999-01-01T23:59:59.000Z

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


341

Dynamic Structure Factor of Microemulsions  

Science Journals Connector (OSTI)

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

G. Gompper and M. Hennes

1994-08-22T23:59:59.000Z

342

The natural structure of physics  

Science Journals Connector (OSTI)

There has been a current feeling of dissatisfaction in the physics community concerning the content and direction of introductory physics courses. The presented position is that this unease does not originate from the lack of exotic new physics in introductory courses but rather from the outdated philosophical picture that these courses paint. Research in the area of fundamental interactions has revealed a natural structure that seems to cover all of physics. This structure is centered on a dynamics nested in the space?time of relativity. The four fundamental interactions originate from internal symmetries embedded in these dynamics. This is the paradigm that should be the template of present physics courses. ?

Victor Kriss

1993-01-01T23:59:59.000Z

343

Excitation Methods for Bridge Structures  

SciTech Connect

This paper summarizes the various methods that have been used to excited bridge structures during dynamic testing. The excitation methods fall into the general categories of ambient excitation methods and measured-input excitation methods. During ambient excitation the input to the bridge is not directly measured. In contrast, as the category label implies, measured-input excitations are usually applied at a single location where the force input to the structure can be monitored. Issues associated with using these various types of measurements are discussed along with a general description of the various excitation methods.

Farrar, C.R.; Duffy, T.A.; Cornwell, P.J.; Doebling, S.W.

1999-02-08T23:59:59.000Z

344

Level structure of Fr215  

Science Journals Connector (OSTI)

The structure of Fr215 has been studied via the Pb208 (11B, 4n?)215Fr reaction at beam energies from 45 to 66 MeV. In-beam ?-ray spectroscopy techniques, including ?-ray excitation function, x-ray-? coincidence, ?-? coincidence, ?-ray angular distribution, and ?-ray linear polarization measurements were used to construct a level scheme up to a spin value J=(41/2) at an excitation energy of 3405 keV. Definite parity assignments were made up to the (39/2)- state. The structure of this nucleus is compared with that observed in the other N=128 isotopes and predictions of shell model calculations.

M. W. Drigert; J. A. Cizewski; M. S. Rosenthal

1985-07-01T23:59:59.000Z

345

Structure beyond the Standard Model  

Science Journals Connector (OSTI)

...see Ross (1997) for a review and further references...superpartners of the Standard Model states. These...factorizable metric M2 Plan ck;4 = M2+ Plan ck;4+ nR and, provided...Structure beyond the Standard Model 415 10 100 10003...

2001-01-01T23:59:59.000Z

346

Hummingbird structure in southeastern Saskatchewan  

SciTech Connect

Saskatchewan's first Devonian oil pool was discovered September 1966, at Hummingbird, 45 mi (72 km) southwest of Weyburn, Saskatchewan. The Hummingbird structure, located on the northwest flank of the Williston basin, is domal is nature and covers approximately 1 mi/sup 2/ (2.6 km/sup 2/). Oil production is from two zones. The Ratcliffe Member of the Mississippian Charles Formation produces from an algal and bioclastic limestone averaging 49 ft (15 m) thick. The Devonian Birdbear Formation produces from a finely crystalline vuggy dolomite averaging 56 ft (17 m) thick. The Hummingbird structure is a sedimentary structure resulting from multiple-stage salt solution and collapse. Recurring local solution of Middle Devonian Prairie Evaporite during Late Devonian and Early Mississippian time resulted in collapse of overlying strata and deposition of compensating thicknesses of Souris River, Duperow, and Bakken sediments. Between Mississippian and Cretaceous time, solution of Prairie Evaporite in the surrounding area caused collapse of all super-Prairie evaporite beds. The extra Souris River, Duperow, and Bakken strata at Hummingbird created the structure. Vertical migration of formation waters along a high-angle fault is suggested as the cause of the local salt solution at Hummingbird.

Smith, D.D.

1985-05-01T23:59:59.000Z

347

EFFICIENT STRUCTURED MULTIFRONTAL FACTORIZATION FOR ...  

E-Print Network (OSTI)

Key words. structured multifrontal method, general sparse matrix, HSS matrix, ... In scientific computations and engineering simulations, the ... has been observed that some discretized PDEs and integral equations have a low- ...... by the MATLAB function condest) is about 1.1 × 10. 9 .... math.purdue.edu/˜xiaj/work/

2013-03-21T23:59:59.000Z

348

Carbon Nanoscience and Electronic Structure  

E-Print Network (OSTI)

Carbon Nanoscience and Electronic Structure Louis Brus We explore the fundamental nature electromagnetic fields, and solar energy nanoscience. He has received the APS Langmuir Prize, the ACS Chemistry of Materials Prize, the OSA Wood Prize, the inaugural Kavli Prize in Nanoscience and in 2012 the Bower Prize

Lewis, Jennifer

349

Policy Selection by Structural Mapping  

Science Journals Connector (OSTI)

27 June 1977 research-article Policy Selection by Structural Mapping B. H. P...is concerned with the selection of 'best' policies from a range of alternative possibilities where each policy is assessed in terms of its degrees of attainment...

1977-01-01T23:59:59.000Z

350

DNA Structural Nanotechnology Duke University  

E-Print Network (OSTI)

DNA Structural Nanotechnology John Reif Duke University Graduate Students: Harish Chandran&Caltech Tube Lattices #12;Ned Seeman New York University, USA Ned Seeman: Father of DNA Nanotechnology His Initial Ideas & Motivation for DNA Nanotechnology #12;Cube Chen & Seeman, Nature350:631 (1991) Truncated

Reif, John H.

351

Sodium loop framework structural analysis  

SciTech Connect

This document provides the structural analysis of the Sodium Loop framework in a drop condition. The drop is similar to the US Department of Transportation non-bulk, performance-oriented packaging (Packaging Group I) drop test. The drop height evaluated for the Sodium Loop framework is 5.9 ft.

Nguyen, P.M.

1995-06-06T23:59:59.000Z

352

High temperature turbine engine structure  

DOE Patents (OSTI)

A high temperature turbine engine includes a rotor portion having axially stacked adjacent ceramic rotor parts. A ceramic/ceramic joint structure transmits torque between the rotor parts while maintaining coaxial alignment and axially spaced mutually parallel relation thereof despite thermal and centrifugal cycling.

Boyd, Gary L. (Tempe, AZ)

1991-01-01T23:59:59.000Z

353

Method and apparatus for synthesizing filamentary structures  

DOE Patents (OSTI)

Method and apparatus for producing filamentary structures. The structures include single-walled nanotubes. The method includes combusting hydrocarbon fuel and oxygen to establish a non-sooting flame and providing an unsupported catalyst to synthesize the filamentary structure in a post-flame region of the flame. Residence time is selected to favor filamentary structure growth.

Height, Murray J. (Somerville, MA); Howard, Jack B. (Winchester, MA); Vandersande, John B. (Newbury, MA)

2008-02-26T23:59:59.000Z

354

Engineering Structurally Configurable Models with Model Transformation  

E-Print Network (OSTI)

: Agilent, Bosch, HSBC, Lockheed-Martin, National Instruments, and Toyota. #12;Engineering Structurally

355

Solar Decathlon Technology Spotlight: Structural Insulated Panels |  

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

Decathlon Technology Spotlight: Structural Insulated Panels Decathlon Technology Spotlight: Structural Insulated Panels Solar Decathlon Technology Spotlight: Structural Insulated Panels September 20, 2011 - 7:13am Addthis These structural insulated panels consist of foam insulation sandwiched between oriented strand boards. (Courtesy of Michael Bacchler) These structural insulated panels consist of foam insulation sandwiched between oriented strand boards. (Courtesy of Michael Bacchler) Alexis Powers EDITOR'S NOTE: Originally posted on the Solar Decathlon News Blog on September 19, 2011. Editor's Note: This post is one of a series of technology spotlights that introduces common technologies used in U.S. Department of Energy Solar Decathlon team houses. Structural insulated panels (SIPs) are prefabricated structural elements

356

Clean Cities: Clean Cities Program Structure  

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

Program Structure to Program Structure to someone by E-mail Share Clean Cities: Clean Cities Program Structure on Facebook Tweet about Clean Cities: Clean Cities Program Structure on Twitter Bookmark Clean Cities: Clean Cities Program Structure on Google Bookmark Clean Cities: Clean Cities Program Structure on Delicious Rank Clean Cities: Clean Cities Program Structure on Digg Find More places to share Clean Cities: Clean Cities Program Structure on AddThis.com... Coordinator Basics Clean Cities Program Structure Reference Materials Technical Support Fundraising Redesignation Outreach Education & Webinars Meetings Reporting Contacts Clean Cities Program Structure Clean Cities is funded and managed by the U.S. Department of Energy (DOE). The organization includes staff from DOE headquarters, national

357

Structural Health Monitoring for Impact Damage in Composite Structures.  

SciTech Connect

Composite structures are increasing in prevalence throughout the aerospace, wind, defense, and transportation industries, but the many advantages of these materials come with unique challenges, particularly in inspecting and repairing these structures. Because composites of- ten undergo sub-surface damage mechanisms which compromise the structure without a clear visual indication, inspection of these components is critical to safely deploying composite re- placements to traditionally metallic structures. Impact damage to composites presents one of the most signi fi cant challenges because the area which is vulnerable to impact damage is generally large and sometimes very dif fi cult to access. This work seeks to further evolve iden- ti fi cation technology by developing a system which can detect the impact load location and magnitude in real time, while giving an assessment of the con fi dence in that estimate. Fur- thermore, we identify ways by which impact damage could be more effectively identi fi ed by leveraging impact load identi fi cation information to better characterize damage. The impact load identi fi cation algorithm was applied to a commercial scale wind turbine blade, and results show the capability to detect impact magnitude and location using a single accelerometer, re- gardless of sensor location. A technique for better evaluating the uncertainty of the impact estimates was developed by quantifying how well the impact force estimate meets the assump- tions underlying the force estimation technique. This uncertainty quanti fi cation technique was found to reduce the 95% con fi dence interval by more than a factor of two for impact force estimates showing the least uncertainty, and widening the 95% con fi dence interval by a fac- tor of two for the most uncertain force estimates, avoiding the possibility of understating the uncertainty associated with these estimates. Linear vibration based damage detection tech- niques were investigated in the context of structural stiffness reductions and impact damage. A method by which the sensitivity to damage could be increased for simple structures was presented, and the challenges of applying that technique to a more complex structure were identi fi ed. The structural dynamic changes in a weak adhesive bond were investigated, and the results showed promise for identifying weak bonds that show little or no static reduction in stiffness. To address these challenges in identifying highly localized impact damage, the possi- bility of detecting damage through nonlinear dynamic characteristics was also identi fi ed, with a proposed technique which would leverage impact location estimates to enable the detection of impact damage. This nonlinear damage identi fi cation concept was evaluated on a composite panel with a substructure disbond, and the results showed that the nonlinear dynamics at the damage site could be observed without a baseline healthy reference. By further developing impact load identi fi cation technology and combining load and damage estimation techniques into an integrated solution, the challenges associated with impact detection in composite struc- tures can be effectively solved, thereby reducing costs, improving safety, and enhancing the operational readiness and availability of high value assets.

Roach, Dennis P.; Raymond Bond (Purdue); Doug Adams (Purdue)

2014-08-01T23:59:59.000Z

358

Beam Coupling to Optical Scale Accelerating Structures  

SciTech Connect

Current research efforts into structure based laser acceleration of electrons utilize beams from standard RF linacs. These beams must be coupled into very small structures with transverse dimensions comparable to the laser wavelength. To obtain decent transmission, a permanent magnet quadrupole (PMQ) triplet with a focusing gradient of 560 T/m is used to focus into the structure. Also of interest is the induced wakefield from the structure, useful for diagnosing potential accelerator structures or as novel radiation sources.

Sears, C.M.; Byer, R.L.; Colby, E.R.; Cowan, B.M.; Ischebeck, R.; Lincoln, M.R.; Siemann, R.H.; Spencer, J.E.; /SLAC; Plettner, T.; /Stanford U., Phys. Dept.

2007-03-27T23:59:59.000Z

359

Beam Coupling to Optical Scale Accelerating Structures  

SciTech Connect

Current research efforts into structure based laser acceleration of electrons utilize beams from standard RF linacs. These beams must be coupled into very small structures with transverse dimensions comparable to the laser wavelength. To obtain decent transmission, a permanent magnet quadrupole (PMQ) triplet with a focusing gradient of 560 T/m is used to focus into the structure. Also of interest is the induced wakefield from the structure, useful for diagnosing potential accelerator structures or as novel radiation sources.

Sears, Christopher M. S.; Colby, Eric R.; Cowan, Benjamin M.; Ischebeck, Rasmus; Lincoln, Melissa R.; Siemann, Robert H.; Spencer, James E. [Stanford Linear Accelerator Center, Menlo Park, CA 94025 (United States); Byer, Robert L.; Plettner, Tomas [Stanford University, Stanford, CA 94305 (United States)

2006-11-27T23:59:59.000Z

360

Monthly Performance Report  

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

BREAKDOWN STRUCTURE ... 11 5.0 FORMAT 2, DD FORM 27342, ORGANIZATIONAL CATEGORIES ... 15 6.0 FORMAT 3, DD FORM...

Note: This page contains sample records for the topic "breakdown structure cbs" 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

Microsoft Word - CTF WBS&PEDS_white paper_v1.doc  

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

WHITE PAPER Work Breakdown Structure and PlantEquipment Designation System Numbering Scheme for the High Temperature Gas- Cooled Reactor (HTGR) Component Test Capability (CTC)...

362

structured | OpenEI Community  

Open Energy Info (EERE)

08 08 Varnish cache server Home Groups Community Central Green Button Applications Developer Utility Rate FRED: FRee Energy Database More Public Groups Private Groups Features Groups Blog posts Content Stream Documents Discussions Polls Q & A Events Notices My stuff Energy blogs 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142235208 Varnish cache server structured Home Graham7781's picture Submitted by Graham7781(2002) Super contributor 15 February, 2013 - 15:25 Reegle mentions OpenEI in video on new Content Pool API data energy OpenEI REEEP REEGLE structured tagging API Reegle and OpenEI share the vision that easy access to energy information will help drive future developments in clean energy development. Syndicate content 429 Throttled (bot load)

363

Process to make structured particles  

DOE Patents (OSTI)

Disclosed is a process for making a composite material that contains structured particles. The process includes providing a first precursor in the form of a dry precursor powder, a precursor liquid, a precursor vapor of a liquid and/or a precursor gas. The process also includes providing a plasma that has a high field zone and passing the first precursor through the high field zone of the plasma. As the first precursor passes through the high field zone of the plasma, at least part of the first precursor is decomposed. An aerosol having a second precursor is provided downstream of the high field zone of the plasma and the decomposed first material is allowed to condense onto the second precursor to from structured particles.

Knapp, Angela Michelle; Richard, Monique N; Luhrs, Claudia; Blada, Timothy; Phillips, Jonathan

2014-02-04T23:59:59.000Z

364

Collective network for computer structures  

DOE Patents (OSTI)

A system and method for enabling high-speed, low-latency global collective communications among interconnected processing nodes. The global collective network optimally enables collective reduction operations to be performed during parallel algorithm operations executing in a computer structure having a plurality of the interconnected processing nodes. Router devices are included that interconnect the nodes of the network via links to facilitate performance of low-latency global processing operations at nodes of the virtual network. The global collective network may be configured to provide global barrier and interrupt functionality in asynchronous or synchronized manner. When implemented in a massively-parallel supercomputing structure, the global collective network is physically and logically partitionable according to the needs of a processing algorithm.

Blumrich, Matthias A; Coteus, Paul W; Chen, Dong; Gara, Alan; Giampapa, Mark E; Heidelberger, Philip; Hoenicke, Dirk; Takken, Todd E; Steinmacher-Burow, Burkhard D; Vranas, Pavlos M

2014-01-07T23:59:59.000Z

365

On rings of structural numbers  

E-Print Network (OSTI)

structural numbers over the set X, and let B(X) have the operations defined above with equality also as before. Theorem I. l. If X is any set, then B(X) is a commutative ring with identity. Proof. The structural number 0 is the additive identity element... with identity g. Definition I. 7. If A, B e S(X) then A'B = (P U q ( p e A, q e B, p Il q = &f and p U q can be formed in an odd number of ways). ~E1 t. 4. L t A = (( . b), (bj. 7 )) 4 B = ((b, c), (b), (a)) be in S(X) for some X. Then AD B = {{b, a), {a...

Powell, Wayne Bruce

2012-06-07T23:59:59.000Z

366

(Structural investigation of curium bismuthide)  

SciTech Connect

The primary objective of the collaborative studies with EITU was to study curium bismuthide using energy dispersive X-ray diffraction to monitor its structure as a function of pressure. This objective was accomplished and the material was investigated up to 0.48 megabars of pressure. These studies were a continuation of established and productive collaborations between ORNL and EITU. The study of this curium compound is significant in that it is the first 5f-element bismuthide to be studied under pressure. Bismuth has the highest Z and the largest radius of the pnictogen group of elements (important for Hill Plot assessments) and has the greatest potential to form f-p type bonding with actinides under pressure. From a preliminary assessment of our experimental data it has been determined that two structural transitions occurred in the curium bismuthide sample as a result of the applied pressure.

Haire, R.G.

1990-10-12T23:59:59.000Z

367

Bifurcation structure of bubble oscillators  

Science Journals Connector (OSTI)

Methods from chaos physics are applied to a model of a driven spherical gas bubble in water to determine its dynamic properties especially its resonance behavior and bifurcation structure. The dynamic properties are described in a growing level of abstraction by radius?time curves trajectories in state space strange attractors in the Poincaré plane basins of attraction bifurcation diagrams winding number diagrams and phase diagrams. A sequence of bifurcation diagrams is given exemplifying the recurrent pattern in the bifurcation set and its relation to the resonances of the system. Period?doubling cascades to chaos and back (‘‘period bubbling’’) are a prominent recurring feature connected with each resonance (demonstrated for period?1 period?2 and period?3 resonances and observed for some higher?order resonances). The recurrent nature of the bifurcation set is most easily seen in the phase diagrams given. A similar structure of the bifurcation set has also been found for other nonlinear oscillators (Duffing Toda laser and Morse).

U. Parlitz; V. Englisch; C. Scheffczyk; W. Lauterborn

1990-01-01T23:59:59.000Z

368

Highest-Resolution Ribosome Structure  

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

Highest-Resolution Ribosome Structure Print Highest-Resolution Ribosome Structure Print The last step in converting the genetic information stored in DNA into the major functional parts of cells is protein biosynthesis. Protein synthesis occurs on the ribosome, a cellular factory found in all forms of life. In contrast to most cellular machines, the ribosome contains a functional core of RNA that is enhanced by ribosomal proteins and accessory factors. Two structures of the intact ribosome from the common bacterium Escherichia coli, determined by a Berkeley-Berlin collaboration to a resolution of 3.5 Ã…, the highest yet achieved, provide many new insights into how the ribosome factory works. Ribosomes Ready for Extreme Close-Up In 1999, the first structure of the intact ribosome-a very large, asymmetric protein that is difficult to crystallize-was solved by x-ray crystallography at the ALS (see "Solving the Ribosome Puzzle"). Since then, scientists have developed quite an extensive photo gallery of ribosomes from various organisms and in various configurations. More importantly, they have sharpened the focus significantly, going from a resolution of 7.8 Ã… in 1999, to 5.5 Ã… in 2001 (see "Zooming in on Ribosomes"), to an amazing 3.5 Ã… in this latest work. What was initially seen as fuzzy "fingers" of electron density can now be resolved into individual nucleotides in the RNA strands. Serendipitously, the crystals used in this particular study contained two versions of the ribosome, each one in a different "pose," allowing the researchers to compare the positions of the various parts and deduce how they work. With these sharper images, scientists are now better able to interpret previous data, test models, and develop new theories, both practical (how do antibiotics that target the ribosome work?) and theoretical (how much has the ribosome evolved from bacteria to human?). Stay tuned.

369

Corrosion performance of structural alloys.  

SciTech Connect

Component reliability and long-term trouble-free performance of structural materials are essential in power-generating and gasification processes that utilize coal as a feedstock. During combustion and conversion of coal, the environments encompass a wide range of oxygen partial pressures, from excess-air conditions in conventional boilers to air-deficient conditions in 10W-NO{sub x} and gasification systems. Apart from the environmental aspects of the effluent from coal combustion and conversion, one concern from the systems standpoint is the aggressiveness of the gaseous/deposit environment toward structural components such as waterwall tubes, steam superheaters, syngas coolers, and hot-gas filters. The corrosion tests in the program described in this paper address the individual and combined effects of oxygen, sulfur, and chlorine on the corrosion response of several ASME-coded and noncoded structural alloys that were exposed to air-deficient and excess-air environments typical of coal-combustion and gasification processes. Data in this paper address the effects of preoxidation on the subsequent corrosion performance of structural materials such as 9Cr-1Mo ferritic steel, Type 347 austenitic stainless steel, Alloys 800, 825, 625, 214, Hastelloy X, and iron aluminide when exposed at 650 C to various mixed-gas environments with and without HCI. Results are presented for scaling kinetics, microstructural characteristics of corrosion products, detailed evaluations of near-surface regions of the exposed specimens, gains in our mechanistic understanding of the roles of S and Cl in the corrosion process, and the effect of preoxidation on subsequent corrosion.

Natesan, K.

1999-07-15T23:59:59.000Z

370

Bismuth Carboxylates with Brucite- and Fluorite-Related Structures: Synthesis Structure and Properties  

Science Journals Connector (OSTI)

Bismuth Carboxylates with Brucite- and Fluorite-Related Structures: Synthesis Structure and Properties ... Bismuth carboxylates exhibiting a brucite-related layer and a fluorite-related structure have been synthesized and characterized. ... The topological arrangement of the nodal building units in the structures indicates that a brucite-related layer (II) and fluorite-related arrangement (III) can be realized in these structures. ...

S. R. Sushrutha; Srinivasan Natarajan

2013-02-27T23:59:59.000Z

371

Crystal structure of guggulsterone Z  

SciTech Connect

The crystal structure of the title compound (4,17(20)-trans-pregnadiene-3,16-dione, C{sub 21}H{sub 28}O{sub 2}) has been determined by direct methods using single-crystal X-ray diffraction data. The compound crystallizes into the orthorhombic space group P2{sub 1}2{sub 1}2{sub 1} with the unit cell parameters a = 7.908(2) A, b = 13.611(3) A, c = 16.309(4) A, and Z = 4. The structure has been refined to R = 0.058 for 3667 observed reflections. The bond distances and angles are in good agreement with guggulsterone E and other related steroid molecules. Ring A exists in the distorted sofa conformation, while rings B and C adopt the distorted chair conformation. Five-membered ring D is intermediate between the half-chair and envelope conformations. The A/B ring junction is quasi-trans, while ring systems B/C and C/D are trans fused about the C(8)-C(9) and C(13)-C(14) bonds, respectively. The steroid nucleus has a small twist, as shown by the C(19)-C(10)...C(13)-C(18) pseudo-torsion angle of 7.2{sup o}. The crystal structure is stabilized by intra-and intermolecular C-H...O hydrogen bonds.

Gupta, V. K., E-mail: vivek_gupta2k2@hotmail.com; Bandhoria, P. [University of Jammu, Post Graduate Department of Physics (India); Gupta, B. D.; Gupta, K. K. [Regional Research Laboratory (India)

2006-03-15T23:59:59.000Z

372

Argonne CNM News: Structural Consequences of Nanolithography  

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

Structural Consequences of Nanolithography Structural Consequences of Nanolithography Ferroelectric domains written by PFM Ferroelectric domains written by PFM exhibit a subtle structural distortion that can be directly observed using hard X-ray nanodiffraction microscopy. Nanolithography effect on structure Modeling shows that the writing process induces a structural electromechanical response to unscreened charges at surfaces and interfaces, altering the local free energy of written ferroelectric domains. Users from the University of Wisconsin-Madison and the Center for Nanophase Materials Science, working with the X-Ray Microscopy Group, have discovered structural effects accompanying the nanoscale lithography of ferroelectric polarization domains. The results shed new light on the physics of

373

Human errors and structural failure probability  

Science Journals Connector (OSTI)

Predicting the influence of human errors on structural failure probability is the topic of this paper. There are two principal reasons for needing this information. First, if errors are present after the design of a structure is completed, as is generally the case, this will provide the engineer with a measure of what effect such errors will have on the structural safety. Second, this information is directly useful in the optimisation of quality assurance expenditures, which can effectively be used for controlling the probability of structural failure due to errors. Simplified probabilistic models are developed to integrate human errors into structural risk assessment. Numerical examples illustrate the sensitivity of structural safety to errors.

Dan M. Frangopol

1988-01-01T23:59:59.000Z

374

Structured video content analysis : learning spatio-temporal and multimodal structures  

E-Print Network (OSTI)

Video data exhibits a variety of structures: pixels exhibit spatial structure, e.g., the same class of objects share certain shapes and/or colors in image; sequences of frames exhibit temporal structure, e.g., dynamic ...

Song, Yale

2014-01-01T23:59:59.000Z

375

Semiconductor wire array structures, and solar cells and photodetectors based on such structures  

DOE Patents (OSTI)

A structure comprising an array of semiconductor structures, an infill material between the semiconductor materials, and one or more light-trapping elements is described. Photoconverters and photoelectrochemical devices based on such structure also described.

Kelzenberg, Michael D.; Atwater, Harry A.; Briggs, Ryan M.; Boettcher, Shannon W.; Lewis, Nathan S.; Petykiewicz, Jan A.

2014-08-19T23:59:59.000Z

376

On the structural relations of malachite. I. The rosasite and ludwigite structure families  

Science Journals Connector (OSTI)

The crystal structures of malachite and rosasite are shown to have a common hypothetical aristotype, which is in turn closely related to the ludwigite structure.

Girgsdies, F.

2012-03-20T23:59:59.000Z

377

Hierarchically structured bicontinuous polymeric microemulsions  

SciTech Connect

We recently described the synthesis and phase behavior of a new type of CECEC-P multiblock copolymer composed of glassy poly(cyclohexylethylene) (C), semicrystalline poly(ethylene) (E), and elastomeric poly(ethylene-alt-propylene) (P) with symmetric (equal volume) CECEC and P sequences (G. Fleury and F. S. Bates, Macromolecules, 2009, 42, 3598-3610). Here we report the formation and characterization of a multicontinuous structure based on the blending of CEC triblock copolymer and P homopolymer with such a hexablock copolymer along the 50:50 (CEC/P) isopleth. These materials produce a sequence of phases that are correlated with the volume fraction of CECEC-P as evidenced by SAXS and TEM measurements. A percolating bicontinuous mesostructure was identified at volume fractions of hexablock copolymer, f{sub CECEC-P} = 0.10 and 0.125, within the composition range known to result in a bicontinuous morphology in A-B/A/B systems. A solid product was formed by cooling the initially homogeneous ternary mixture from above the melting temperature of the E blocks to room temperature. Crystallization of E leads to microphase separation of C and E and simultaneous ejection of P from CEC (and CECEC) at a larger length scale. The mechanical properties of these materials are inferior to what is anticipated based on pure CEC triblock copolymer, attributable to the low molecular weight and irregular structure of the C/E region sequences. Nevertheless, this study establishes a procedure for producing bicontinuous yet structurally asymmetric materials based on the microemulsion process and extends the concept of a microemulsion to multiblock copolymers.

Fleury, Guillaume; Bates, Frank S. (UMM)

2012-07-24T23:59:59.000Z

378

Investigation of deployable structures and their actuation  

E-Print Network (OSTI)

Deployable Structures had not been designed for use in the oil field industry, and additionally have not been designed as devices to perform mechanical work. By analyzing deployable structures a detailed understanding of ...

Munro, Logan

2007-01-01T23:59:59.000Z

379

Nuclear Facility Construction - Structural Concrete, May 29,...  

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

Nuclear Facility Construction - Structural Concrete, May 29, 2009 (HSS CRAD 64-15, Rev. 0) Nuclear Facility Construction - Structural Concrete, May 29, 2009 (HSS CRAD 64-15, Rev....

380

Seismic assessment strategies for masonry structures  

E-Print Network (OSTI)

Masonry structures are vulnerable to earthquakes, but their seismic assessment remains a challenge. This dissertation develops and improves several strategies to better understand the behavior of masonry structures under ...

DeJong, Matthew J. (Matthew Justin)

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "breakdown structure cbs" 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

Structural analysis and assessment of Guastavino vaulting  

E-Print Network (OSTI)

This thesis studies the behavior and pathologies of the masonry tile structures built by the R. Guastavino Company in order to provide recommendations on their analysis and assessment. Structural analyses of two specific ...

Reese, Megan L

2008-01-01T23:59:59.000Z

382

Hyperfine Structure of EuI  

Science Journals Connector (OSTI)

14 December 1965 research-article Hyperfine Structure of EuI Y. Bordarier B. R. Judd M. Klapisch A theoretical analysis is made of the hyperfine structure of the twelve levels of Eu I...

1965-01-01T23:59:59.000Z

383

Structure and interactions in simple solutions  

Science Journals Connector (OSTI)

...was performed on molecular ensembles containing 300 water molecules...In From semiconductors to proteins: beyond the average structure...tein denaturations. Adv. Protein Chem. 14, 163. Neilson...refinement for liquids and disordered materials. In Local structure...

2004-01-01T23:59:59.000Z

384

Puja Pandals : rethinking an urban bamboo structure  

E-Print Network (OSTI)

Pandal's are large tent like structures that are recreations of popular buildings, usually temples, built in wood and cloth over a bamboo super-structure. Traditionally they are built for Durga Puja, a festival in the month ...

Oza, Nilay

2000-01-01T23:59:59.000Z

385

Thermoplastic active fiber composites for structural actuation  

E-Print Network (OSTI)

The integration of piezoelectric actuators into a structure can lead to an active structural surface that can adapt by bending or straining to different operational conditions. This can be used to tune desired properties ...

Dunn, Christopher Thomas, 1971-

2002-01-01T23:59:59.000Z

386

The design and construction of fabric structures  

E-Print Network (OSTI)

In its short history, fabric structures have fascinated architects and engineers alike. Architects appreciate their unusual shapes and forms while engineers delight in their "pure" structural expression. Capable of spanning ...

Fang, Rosemarie

2009-01-01T23:59:59.000Z

387

Time Structure of the LANSCE Beam  

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

Beam One of the greatest strengths of the LANSCE facility is that it can produce proton beams with a wide range of time structures. Time Structure of the LANSCE Beam One of the...

388

Polariton dispersion of periodic quantum well structures  

Science Journals Connector (OSTI)

We studied the polariton dispersion relations of a periodic quantum-well structure with a period in the vicinity of half the exciton resonance wavelength, i.e., the Bragg structure. We classified polariton mod...

A. V. Mintsev; L. V. Butov; C. Ell; S. Mosor…

2002-11-01T23:59:59.000Z

389

Single Molecule Probes of Lipid Membrane Structure  

E-Print Network (OSTI)

structural metrics with function in biological membranes. Single-molecule fluorescence studies were used to measure membrane structure at the molecular level. Several groups have shown that polarized total internal reflection fluorescence microscopy (PTIRF...

Livanec, Philip W.

2009-12-14T23:59:59.000Z

390

Structure formation: Models, Dynamics and Status  

E-Print Network (OSTI)

The constraints on the models for the structure formation arising from various cosmological observations at different length scales are reviewed. The status of different models for structure formation is examined critically in the light of these observations.

T. Padmanabhan

1995-08-25T23:59:59.000Z

391

Past and future of grid shell structures  

E-Print Network (OSTI)

Because of their original organic shape and the column free space that they provide, the design of grid shell structures challenges architects and structural engineers in more than one way. Very few grid shell building ...

Paoli, Céline (Céline Aude)

2007-01-01T23:59:59.000Z

392

Mathematical modelings of smart materials and structures  

E-Print Network (OSTI)

Mathematical modelings of smart materials and structures Christian Licht , Thibaut Weller mathematical models of smart materials and smart structures. Smart materials are materials which present perturbations methods, asymptotic analysis, plates and rods models. 1 Introduction Smart materials present

Paris-Sud XI, Université de

393

Nonlinear structural crack growth monitoring  

DOE Patents (OSTI)

A method and apparatus are provided for the detection, through nonlinear manipulation of data, of an indicator of imminent failure due to crack growth in structural elements. The method is a process of determining energy consumption due to crack growth and correlating the energy consumption with physical phenomena indicative of a failure event. The apparatus includes sensors for sensing physical data factors, processors or the like for computing a relationship between the physical data factors and phenomena indicative of the failure event, and apparatus for providing notification of the characteristics and extent of such phenomena.

Welch, Donald E. (Oak Ridge, TN); Hively, Lee M. (Philadelphia, TN); Holdaway, Ray F. (Clinton, TN)

2002-01-01T23:59:59.000Z

394

Explosive scabbling of structural materials  

DOE Patents (OSTI)

A new approach to scabbling of surfaces of structural materials is disclosed. A layer of mildly energetic explosive composition is applied to the surface to be scabbled. The explosive composition is then detonated, rubbleizing the surface. Explosive compositions used must sustain a detonation front along the surface to which it is applied and conform closely to the surface being scabbled. Suitable explosive compositions exist which are stable under handling, easy to apply, easy to transport, have limited toxicity, and can be reliably detonated using conventional techniques.

Bickes, Jr., Robert W. (Albuquerque, NM); Bonzon, Lloyd L. (Albuquerque, NM)

2002-01-01T23:59:59.000Z

395

Fluctuations in Avalanche Photodiode Structure  

SciTech Connect

The number of primary photo-electrons and the excess noise factor of the Avalanche photodiode (APD) are important parameters for the energy resolution of the crystal-APD system. In the present paper, the mean signal value and its fluctuations have been investigated for the well defined silicon Hamamatsu S8148 APD structure as a function of incident photons wavelength. Calculations were made with a Single Particle Monte Carlo simulation technique. Based on this work, the performance of the Hamamatsu S8148 APD as a photodetector for the PbWO4 scintillation light has been discussed.

Kocak, Fatma; Tapan, Ilhan [Department of Physics, Uludag University, 16059, Bursa (Turkey)

2007-04-23T23:59:59.000Z

396

Convectively cooled electrical grid structure  

DOE Patents (OSTI)

Undesirable distortions of electrical grid conductors from thermal cycling are minimized and related problems such as unwanted thermionic emission and structural failure from overheating are avoided by providing for a flow of fluid coolant within each conductor. The conductors are secured at each end to separate flexible support elements which accommodate to individual longitudinal expansion and contraction of each conductor while resisting lateral displacements, the coolant flow preferably being directed into and out of each conductor through passages in the flexible support elements. The grid may have a modular or divided construction which facilitates manufacture and repairs.

Paterson, J.A.; Koehler, G.W.

1980-11-10T23:59:59.000Z

397

A 150-Ton Universal Structure Testing Machine  

Science Journals Connector (OSTI)

... 150-ton universal structure testing machine for Short Bros, and Harland, Ltd. (Engineer, December 26, pp. 594–596). ...

C. F. TIPPER

1948-04-24T23:59:59.000Z

398

Finding Structure via Compression Jason L. Hutchens  

E-Print Network (OSTI)

Structurevia Compression Jason L. Hutchens and Michael D. Alder (1998) Finding Structure via Compression. In D.M.W

399

Preserving Diesel Exhaust Ultrafine (Nano-) Particulate Structure...  

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

Preserving Diesel Exhaust Ultrafine (Nano-) Particulate Structure in Genotoxicity Studies to Support Engineering Development of Emission Controls Preserving Diesel Exhaust...

400

Electrons and Nuclei: Fundamental Interactions and Structure  

E-Print Network (OSTI)

Examples are given of the usefulness of electrons in interaction with nuclei for probing fundamental interactions and structure

Ernest M. Henley

1998-01-14T23:59:59.000Z

Note: This page contains sample records for the topic "breakdown structure cbs" 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

DIVISION 05 METALS 05120 STRUCTURAL STEEL  

E-Print Network (OSTI)

STEEL A. Design Considerations 1. Testing and inspection will be required for structural steel work testing and inspection of structural steel work will be contracted for and paid for by the University, regardless of building class. The A/E must specify all testing and inspection of structural steel

402

Hybrid Model Structures Aaron David Ames  

E-Print Network (OSTI)

Hybrid Model Structures by Aaron David Ames B.A. (University of St. Thomas) 2001 B.S. (University of California, Berkeley Fall 2006 #12;Hybrid Model Structures Copyright 2006 by Aaron David Ames #12;Abstract Hybrid Model Structures by Aaron David Ames Masters of Arts in Mathematics University of California

Ames, Aaron

403

Holonomic Dmodule with Betti structure Takuro MOCHIZUKI  

E-Print Network (OSTI)

RIMS­1688 Holonomic D­module with Betti structure By Takuro MOCHIZUKI January 2010 RESEARCH INSTITUTE FOR MATHEMATICAL SCIENCES KYOTO UNIVERSITY, Kyoto, Japan #12; Holonomic D­module with Betti structure Takuro Mochizuki Abstract This is an attempt to define a notion of Betti structure with nice

404

EFFECTIVE STRUCTURAL HEALTH MONITORING WITH ADDITIVE MANUFACTURING  

E-Print Network (OSTI)

will be presented for components that can be processed by additive manufacturing (AM) or 3D printing. The origin structures. KEYWORDS : structural health monitoring methodology, 3D printing, additive manufacturing, fatigue, intelligent structure INTRODUCTION Additive manufacturing (AM), also known as 3D Printing or Rapid

Boyer, Edmond

405

Cryogenic structural materials for superconducting magnets  

SciTech Connect

This paper reviews research in the United States and Japan on structural materials for high-field superconducting magnets. Superconducting magnets are used for magnetic fusion energy devices and for accelerators that are used in particle-physics research. The cryogenic structural materials that we review are used for magnet cases and support structures. We expect increased materials requirements in the future.

Dalder, E.N.C.; Morris, J.W. Jr.

1985-02-22T23:59:59.000Z

406

Structural optimization strategies to design green products  

Science Journals Connector (OSTI)

This paper addresses the need for a structured approach to environmental assessment and improvement. We propose a computer-aided methodology, named Eco-OptiCAD, based on the integration of Structural Optimization and Life Cycle Assessment (LCA) tools. ... Keywords: CAE, Eco-design, LCA, Structural optimization

Davide Russo, Caterina Rizzi

2014-04-01T23:59:59.000Z

407

Electronic structure of turbostratic graphene  

Science Journals Connector (OSTI)

We explore the rotational degree of freedom between graphene layers via the simple prototype of the graphene twist bilayer, i.e., two layers rotated by some angle ?. It is shown that, due to the weak interaction between graphene layers, many features of this system can be understood by interference conditions between the quantum states of the two layers, mathematically expressed as Diophantine problems. Based on this general analysis we demonstrate that while the Dirac cones from each layer are always effectively degenerate, the Fermi velocity vF of the Dirac cones decreases as ??0°; the form we derive for vF(?) agrees with that found via a continuum approximation in [J. M. B. Lopes dos Santos, N. M. R. Peres, and A. H. Castro Neto, Phys. Rev. Lett. 99, 256802 (2007)]. From tight-binding calculations for structures with 1.47°??0 the Dirac point is fourfold degenerate, while at ?=0 one has the twofold degeneracy of the AB stacked bilayer. Interestingly, in this limit the electronic properties are in an essential way determined globally, in contrast to the “nearsightedness” [W. Kohn, Phys. Rev. Lett. 76, 3168 (1996)] of electronic structure generally found in condensed matter.

S. Shallcross; S. Sharma; E. Kandelaki; O. A. Pankratov

2010-04-09T23:59:59.000Z

408

Battery structures, self-organizing structures, and related methods  

DOE Patents (OSTI)

An energy storage device includes a first electrode comprising a first material and a second electrode comprising a second material, at least a portion of the first and second materials forming an interpenetrating network when dispersed in an electrolyte, the electrolyte, the first material and the second material are selected so that the first and second materials exert a repelling forve on each other when combined. An electrochemical device, includes a first electrode in electrical communication with a first current collector; a second electrode in electrical communication with a second current collector; and an ionicaily conductive medium in ionic contact with said first and second electrodes, wherein at least a portion of the first and second electrodes form an interpenetrating network and wherein at least one of the first and second electrodes comprises an electrode structure providing two or more pathways to its current collector.

Chiang, Yet-Ming; Moorehead, William Douglas

2013-11-19T23:59:59.000Z

409

Battery Structures, self-organizing structures, and related methods  

DOE Patents (OSTI)

An energy storage device includes a first electrode comprising a first material and a second electrode comprising a second material, at least a portion of the first and second materials forming an interpenetrating network when dispersed in an electrolyte, the electrolyte, the first material and the second material are selected so that the first and second materials exert a repelling force on each other when combined. An electrochemical device, includes a first electrode in electrical communication with a first current collector; a second electrode in electrical communication with a second current collector; and an ionically conductive medium in ionic contact with said first and second electrodes, wherein at least a portion of the first and second electrodes form an interpenetrating network and wherein at least one of the first and second electrodes comprises an electrode structure providing two or more pathways to its current collector.

Chiang, Yet-Ming; Moorehead, William Douglas

2013-11-12T23:59:59.000Z

410

Structural Code Considerations for Solar Rooftop Installations.  

SciTech Connect

Residential rooftop solar panel installations are limited in part by the high cost of structural related code requirements for field installation. Permitting solar installations is difficult because there is a belief among residential permitting authorities that typical residential rooftops may be structurally inadequate to support the additional load associated with a photovoltaic (PV) solar installation. Typical engineering methods utilized to calculate stresses on a roof structure involve simplifying assumptions that render a complex non-linear structure to a basic determinate beam. This method of analysis neglects the composite action of the entire roof structure, yielding a conservative analysis based on a rafter or top chord of a truss. Consequently, the analysis can result in an overly conservative structural analysis. A literature review was conducted to gain a better understanding of the conservative nature of the regulations and codes governing residential construction and the associated structural system calculations.

Dwyer, Stephen F.; Dwyer, Brian P.; Sanchez, Alfred

2014-12-01T23:59:59.000Z

411

Structural organization of gap junction channels  

Science Journals Connector (OSTI)

Gap junctions were initially described morphologically, and identified as semi-crystalline arrays of channels linking two cells. This suggested that they may represent an amenable target for electron and X-ray crystallographic studies in much the same way that bacteriorhodopsin has. Over 30 years later, however, an atomic resolution structural solution of these unique intercellular pores is still lacking due to many challenges faced in obtaining high expression levels and purification of these structures. A variety of microscopic techniques, as well as NMR structure determination of fragments of the protein, have now provided clearer and correlated views of how these structures are assembled and function as intercellular conduits. As a complement to these structural approaches, a variety of mutagenic studies linking structure and function have now allowed molecular details to be superimposed on these lower resolution structures, so that a clearer image of pore architecture and its modes of regulation are beginning to emerge.

Gina E. Sosinsky; Bruce J. Nicholson

2005-01-01T23:59:59.000Z

412

March 29, 2008 OS: OS Structures 1 Operating-Systems Structures  

E-Print Network (OSTI)

March 29, 2008 OS: OS Structures 1 Operating-Systems Structures #12;March 29, 2008 OS: OS Structures 2 Objectives To describe the services an operating system provides to users, processes, and other systems To discuss the various ways of structuring an operating system To explain how operating systems

Adam, Salah

413

Independent evolution of song structure and note structure in American wood warblers  

Science Journals Connector (OSTI)

...structure and note structure in American wood warblers Josh V. Buskirk Zoologishes Institut...example the songs of 51 North American wood warblers (Parulinae). I combined published...structure and note structure in American wood warblers JOSH VAN BUSKIRK oologishes Institut...

1997-01-01T23:59:59.000Z

414

OpenEI Community - structured  

Open Energy Info (EERE)

Reegle mentions Reegle mentions OpenEI in video on new Content Pool API http://en.openei.org/community/blog/reegle-mentions-openei-video-new-content-pool-api Reegle and OpenEI share the vision that easy access to energy information will help drive future developments in clean energy development.read more http://en.openei.org/community/blog/reegle-mentions-openei-video-new-content-pool-api#comments data energy OpenEI REEEP REEGLE structured tagging API OpenEI Community

415

Electronic structure of polypyrrole films  

Science Journals Connector (OSTI)

Chemical and electronic properties of polypyrrole films are investigated for different doping levels using x-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy, and high-resolution electron-energy-loss spectroscopy. The XPS results give evidence for instabilities in perchlorate-doped polypyrrole films, whereas tosylate-doped samples are chemically stable. The valence-band structure of the latter is in line with the theoretically expected features of this one-dimensional polymer. Upon doping, we observe occupied states and electronic transitions in the gap. At low dopant concentrations (4%) these states are polaronic. At around 10% doping they cause a semiconductor-metal transition. The finite density of states at the Fermi energy is in accordance with polaronic bands modulated by Coulomb repulsion, as well as with a disorder-induced destabilization of the Peierls ground state.

P. Bätz; D. Schmeisser; W. Göpel

1991-04-15T23:59:59.000Z

416

Reversible Hydrogen Storage Materials – Structure, Chemistry, and Electronic Structure  

SciTech Connect

To understand the processes involved in the uptake and release of hydrogen from candidate light-weight metal hydride storage systems, a combination of materials characterization techniques and first principle calculation methods have been employed. In addition to conventional microstructural characterization in the transmission electron microscope, which provides projected information about the through thickness microstructure, electron tomography methods were employed to determine the three-dimensional spatial distribution of catalyst species for select systems both before and after dehydrogenation. Catalyst species identification as well as compositional analysis of the storage material before and after hydrogen charging and discharging was performed using a combination of energy dispersive spectroscopy, EDS, and electron energy loss spectroscopy, EELS. The characterization effort was coupled with first-principles, electronic-structure and thermodynamic techniques to predict and assess meta-stable and stable phases, reaction pathways, and thermodynamic and kinetic barriers. Systems studied included:NaAlH4, CaH2/CaB6 and Ca(BH4)2, MgH2/MgB2, Ni-Catalyzed Magnesium Hydride, TiH2-Catalyzed Magnesium Hydride, LiBH4, Aluminum-based systems and Aluminum

Robertson, Ian M. [University of Wisconsin-Madison; Johnson, Duane D. [Ames Lab., Iowa

2014-06-21T23:59:59.000Z

417

Auxiliary basis expansions for large-scale electronic structure calculations  

E-Print Network (OSTI)

large-scale electronic structure calculations. Yousung Jungcost of electronic structure calculations is to employIntroduction. Electronic structure calculations are normally

Jung, Yousung; Sodt, Alexander; Gill, Peter W.M.; Head-Gordon, Martin

2005-01-01T23:59:59.000Z

418

A Fast Parallel Algorithm for Selected Inversion of Structured Sparse Matrices with Application to 2D Electronic Structure Calculations  

E-Print Network (OSTI)

large-scale electronic-structure calculations, Europhys.Tight-binding electronic-structure calculations and tight-large-scale electronic structure calculations, Phy. Rev. B

Lin, Lin

2010-01-01T23:59:59.000Z

419

Engineering and Structural Mechanics - Nuclear Engineering Division  

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

Engineering and Structural Mechanics Engineering and Structural Mechanics Capabilities Engineering Computation and Design Engineering and Structural Mechanics Overview Areas of Application Examples of Analyses Systems/Component Design, Engineering and Drafting Heat Transfer and Fluid Mechanics Multi-physics Reactor Performance and Safety Simulations Other Capabilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Engineering and Structural Mechanics Bookmark and Share Analysis of a Reinforced Concrete Structure using the NEPTUNE Finite Element Code Analysis of a Reinforced Concrete Structure using the NEPTUNE Finite Element Code. Depicted are Cracks in the Concrete Surface due to an Internal Pressurization. Click on image to view larger image.

420

Aquifer Structure Identification Using Stochastic Inversion  

SciTech Connect

This study presents a stochastic inverse method for aquifer structure identification using sparse geophysical and hydraulic response data. The method is based on updating structure parameters from a transition probability model to iteratively modify the aquifer structure and parameter zonation. The method is extended to the adaptive parameterization of facies hydraulic parameters by including these parameters as optimization variables. The stochastic nature of the statistical structure parameters leads to nonconvex objective functions. A multi-method genetically adaptive evolutionary approach (AMALGAM-SO) was selected to perform the inversion given its search capabilities. Results are obtained as a probabilistic assessment of facies distribution based on indicator cokriging simulation of the optimized structural parameters. The method is illustrated by estimating the structure and facies hydraulic parameters of a synthetic example with a transient hydraulic response.

Harp, Dylan R [Los Alamos National Laboratory; Dai, Zhenxue [Los Alamos National Laboratory; Wolfsberg, Andrew V [Los Alamos National Laboratory; Vrugt, Jasper A [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "breakdown structure cbs" 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

Conformal coating of highly structured surfaces  

DOE Patents (OSTI)

Method of applying a conformal coating to a highly structured substrate and devices made by the disclosed methods are disclosed. An example method includes the deposition of a substantially contiguous layer of a material upon a highly structured surface within a deposition process chamber. The highly structured surface may be associated with a substrate or another layer deposited on a substrate. The method includes depositing a material having an amorphous structure on the highly structured surface at a deposition pressure of equal to or less than about 3 mTorr. The method may also include removing a portion of the amorphous material deposited on selected surfaces and depositing additional amorphous material on the highly structured surface.

Ginley, David S.; Perkins, John; Berry, Joseph; Gennett, Thomas

2012-12-11T23:59:59.000Z

422

The structure of the carbon black flame  

E-Print Network (OSTI)

THE STRUCTURE OF THE CARBON BLACK FLAME A Dissertation By W1 111 ami Kermit Anderson THEHSR UCOF Approval as to style and content recommended Head of tiie Department of Chemistry A Dissertation Submitted to the Faculty of the Agricultural... and Mechanical College of. Texas in Parti ail Fulfilment of the Requirements for the Degree of Doctor of Philosophy THE STRUCTURE OF THE CARBON BLACK FLAME Major Subject: Chemistry AB William Hermit Anderson:\\ t * August 1945 THE STRUCTURE OF THE. CARBON...

Anderson, W. Kermi

1945-01-01T23:59:59.000Z

423

Structure and ductility of TiAl  

SciTech Connect

The effect of structural factors (grain size and grain boundary structure) and strain rate on the deformation mechanism and ductility of TiAl in the temperature range of brittle-to-ductile transition and at room temperature was systematically investigated. It has been established that it is possible to substantially affect the deformation mechanism and ductility of this intermetallic by controlling structural factors, particularly the grain size, and varying the strain rate.

Imayev, R.; Salishchev, G.; Imayev, V.; Shagiev, M.; Kuznetzov, A. [Inst. for Metals Superplasticity Problems, Ufa (Russian Federation)

1995-12-31T23:59:59.000Z

424

Process development for a field emission structure  

E-Print Network (OSTI)

self-aligned process technology has been developed to fabricate field emis- sion structures using standard semiconductor fabrication procedures. Arrays of field emission diode structures incorporating silicon cathodes have been fabricated... already been fa. bricated. The aim of' this research is focused on developing a process technology to fabri- cate field emission structures incorporating a low work function cathode material. In addition, this technology must allow for adjustable anode...

Legg, James Derek

2012-06-07T23:59:59.000Z

425

Method of casting patterned dielectric structures  

DOE Patents (OSTI)

A pattern of dielectric structures are formed directly on a substrate in a single step using sol-gel chemistry and molding procedures. The resulting dielectric structures are useful in vacuum applications for electronic devices. Porous, lightweight structures having a high aspect ratio that are suitable for use as spacers between the faceplate and baseplate of a field emission display can be manufactured using this method.

Poco, John F. (Livermore, CA); Hrubesh, Lawrence W. (Livermore, CA)

2001-01-01T23:59:59.000Z

426

Unravelling lignin formation and structure  

SciTech Connect

During this study, we established that the Fagaceae exclusively accumulate Z-monolignois/glucosides, and not the E-isomers. Evidence for the presence of a novel E{yields}Z isomerse has been obtained. Our pioneering work in lignin biosynthesis and structure in situ has also progressed smoothly. We established the bonding environments of a woody angiosperm, Leucanea leucocephala, as well as wheat (T. aestivum) and tobacco (N. tabacum). A cell culture system from Pinus taeda was developed which seems ideal for investigating the early stages of lignification. These cultures excrete peroxidase isozymes, considered to be specifically involved in lignin deposition. We also studied the effect of the putative lignin-degrading enzyme, lignin peroxidase, on monolignols and dehydropolymerisates therefrom. In all cases, polymerization was observed, and not degradation; these polymers are identical to that obtained with horseradish peroxidases/H{sub 2}O{sub 2}. It seems inconceivable that these enzymes can be considered as being primarily responsible for lignin biodegradation.

Lewis, N.G. (Washington State Univ., Pullman, WA (United States). Inst. of Biological Chemistry)

1991-01-01T23:59:59.000Z

427

NREL: Wind Research - Structural Testing Laboratory  

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

Structural Testing Laboratory Structural Testing Laboratory Photo of NREL's Wind Research User Facility. Shown in front are several test bays that protect proprietary information while companies disassemble turbines to analyze, test, and modify individual components. NREL's Structural Testing Laboratory includes office space for industry researchers, houses experimental laboratories, computer facilities, space for assembling turbines, components, and blades for testing. Credit: Patrick Corkery. NREL's Structural Testing Laboratory at the National Wind Technology Center (NWTC) provides office space for industry researchers, experimental laboratories, computer facilities for analytical work, and space for assembling components and turbines for atmospheric testing. The facility also houses two blade stands equipped with overhead cranes and

428

Essays on Development, Ownership Structure, and Agriculture.  

E-Print Network (OSTI)

??This thesis examines how ownership structure and climate change issues affect farmers in developing countries in three chapters. The first chapter surveys the theoretical and… (more)

Moorthy, Aravind

2012-01-01T23:59:59.000Z

429

Pore Structure of the Argonne Premium Coals  

Science Journals Connector (OSTI)

Pore Structure of the Argonne Premium Coals ... Constitution of Illinois No. 6 Argonne Premium Coal: A Review ... Constitution of Illinois No. 6 Argonne Premium Coal: A Review ...

John W. Larsen; Peter Hall; Patrick C. Wernett

1995-03-01T23:59:59.000Z

430

Nuclear structure and nuclear reactions | Argonne Leadership...  

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

the production Automatic Dynamic Load Balancing (ADLB) library on the BGP. Steve Pieper, Argonne National Laboratory Nuclear structure and nuclear reactions PI Name: James Vary PI...

431

Electrical and structural characterization of metal germanides.  

E-Print Network (OSTI)

??Metal-semiconductor contacts have been widely studied in the past 60 years. These structures are of importance in the microelectronics industry. As the scaling down of… (more)

Chawanda, Albert

2011-01-01T23:59:59.000Z

432

Preparation and structure of aluminosilicate aerogels  

Science Journals Connector (OSTI)

Preparation and structure of aluminosilicate aerogels ... In the present work, aluminosilicate aerogels prepared under various conditions were compared with respect to their nanostructures and porosity. ...

F. Chaput; A. Lecomte; A. Dauger; J. P. Boilot

1989-03-01T23:59:59.000Z

433

Fine Structure Studies in Proton Emission  

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

Structure Studies in Proton Emission In order to understand the evolution of single particle wave functions and deformations beyond the proton drip line, a program has been...

434

Electron Temperature Structures Associated With Magnetic Tearing  

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

flattening is characteristic of rapid parallel heat conduction along helical magnetic field lines. The spatial structure of the temperature fluctuations show that the location of...

435

Structured Storage in ATLAS Distributed Data Management  

E-Print Network (OSTI)

CHEP'12 Talk Structured Storage - Concepts - Technologies ATLAS DDM Use Cases - Storage facility - Data intensive analytics Operational Experiences - Software - Hardware Conclusions

Lassnig, M; The ATLAS collaboration; Molfetas, A; Beermann, T; Dimitrov, G; Canali, L; Zang, D

2012-01-01T23:59:59.000Z

436

Novel Composite Cathode Structures | Department of Energy  

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

and Vehicle Technologies Program Annual Merit Review and Peer Evaluation es115johnson2011p.pdf More Documents & Publications Novel Composite Cathode Structures Vehicle...

437

Novel Composite Cathode Structures | Department of Energy  

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

and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting es115johnson2012o.pdf More Documents & Publications Novel Composite Cathode Structures...

438

Tropical Cloud Life Cycle and Overlap Structure  

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

Tropical Cloud Life Cycle and Overlap Structure Vogelmann, Andrew Brookhaven National Laboratory Jensen, Michael Brookhaven National Laboratory Kollias, Pavlos Brookhaven National...

439

Ultra Large Castings For Lightweight Vehicle Structures  

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

Die Casting process for their potential to enable the production of aluminum and magnesium primary automotive cast structural components with consistent and predictable...

440

STRUCTURE magazine April 2007 newtrends,newtechniquesandcurrentindustryissues  

E-Print Network (OSTI)

must consider tech- nically feasible structural remediation technologies and life cycle maintenance research programs with carbon fiber systems enable opportuni- ties for development of innovative and cost

Mobasher, Barzin

Note: This page contains sample records for the topic "breakdown structure cbs" 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

6.004 Computation Structures, Fall 2002  

E-Print Network (OSTI)

Introduces architecture of digital systems, emphasizing structural principles common to a wide range of technologies. Multilevel implementation strategies; definition of new primitives (e.g., gates, instructions, procedures, ...

Ward, Stephen A.

442

Aerodynamic Lightweight Cab Structure Components | Department...  

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

and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting lm060smith2012o.pdf More Documents & Publications Aerodynamic Lightweight Cab Structure...

443

Hybrid Rotaxanes: Interlocked Structures for Quantum Computing...  

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

Hybrid Rotaxanes: Interlocked Structures for Quantum Computing? Print Rotaxanes are mechanically interlocked molecular architectures consisting of a dumbbell-shaped molecule, the...

444

Collaboration drives achievement in protein structure research  

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

AlumniLink November 2014 Collaboration drives achievement in protein structure research Alumni Link: Opportunities, News and Resources for Former Employees Latest...

445

Structural Risk Minimization Kernels Support Vector Machines Support Vector Machines  

E-Print Network (OSTI)

Dimensional Spaces Many acceptable solutions bad generalization Structural Risk Minimization Kernels SupportStructural Risk Minimization Kernels Support Vector Machines Support Vector Machines Kernel Methods Structural Risk Minimization Kernels Support Vector Machines 1 Structural Risk Minimization High Dimensional

Kjellström, Hedvig

446

African horse sickness virus structure  

Science Journals Connector (OSTI)

African horse sickness virus (AHSV), of which there are nine serotypes (AHSV-1, -2, etc.), is a member of Orbivirus genus within the Reoviridae family. Both in morphology and molecular constituents AHSV particles are comparable to those of bluetongue virus (BTV), the prototype virus of the genus. The two viruses have seven structural proteins (VP1–7) organized in two layered capsid. The outer capsid is composed of VP2 and VP5. The inner capsid, or core, is composed of two major proteins, VP3 and VP7, and three minor proteins, VP1, VP4 and VP6. Within the core is the virus genome. This genome consists of 10 double-stranded (ds)RNA segments of different sizes, three large, designated L1–L3, three medium, M4–M6, and four small, S7–S10. In addition to the seven stuctural proteins that are coded by seven of the RNA species, four non-structural proteins, NS1, NS2, NS3 and NS3A, are coded by three RNA segments, M5, S8 and S10. The two smallest proteins (NS3 and NS3A) are synthesized by the S10 RNA segment, probably from different in-frame translation initiation codons. Nucleotide sequences of eight RNA segments (L2, L3, M4, M5, M6, S7, S8 and S10) and the predicted amino acid sequences of the encoded gene products are also available, mainly representing one serotype, AHSV-4. In this review the properties of the AHSV genes and gene products are discussed. The sequence and hybridization analyses of the different AHSV dsRNA segments indicate that the segments that code for the core proteins, as well as those that code for NS1 and NS2 proteins, are highly conserved between the different virus serotypes. However, the RNA encoding NS3 and NS3A, and the two segments encoding the outer capsid proteins, are more variable between the AHSV serotypes. A close phylogenetic relationship between AHSV, BTV and epizootic haemorrhagic disease virus (EHDV), three Culicoides-transmitted orbiviruses, has been revealed when the equivalent sequences of genes and gene products are compared. Recently, the four major AHSV capsid proteins have been expressed using recombinant baculoviruses. Biochemically and antigenically these proteins are similar to the authentic proteins. Since the AHSV VP7 protein is highly conserved among the different serotypes, it has been utilized as a diagnostic reagent. The expressed VP7 protein has also been purified to homogeneity and crystallized for three-dimensional X-ray analysis. The expressed outer capsid proteins, VP2 and VP5, have been purified and used to raise antisera in rabbits. The VP2 antisera neutralize virus infections in vitro indicating the importance of this protein for vaccine development.

Polly Roy; Peter P.C. Mertens; Ignacio Casal

1994-01-01T23:59:59.000Z

447

Spinor structure and internal symmetries  

E-Print Network (OSTI)

Space-time and internal symmetries are considered within one theoretical framework based on the generalized spin and abstract Hilbert space. Complex momentum is understood as a generating kernel of the underlying spinor structure. It is shown that tensor products of biquaternion algebras are associated with the each irreducible representation of the Lorentz group. Space-time discrete symmetries $P$, $T$ and their combination $PT$ are generated by the fundamental automorphisms of this algebraic background (Clifford algebras). Charge conjugation $C$ is presented by a pseudoautomorphism of the complex Clifford algebra. This description of the operation $C$ allows one to distinguish charged and neutral particles including particle-antiparticle interchange and truly neutral particles. Quotient representations of the Lorentz group and their possible relations with $P$- and $CP$-violations are considered. Spin and charge multiplets, based on the interlocking representations of the Lorentz group, are introduced. A central point of the work is a correspondence between Wigner definition of elementary particle as an irreducible representation of the Poincar\\'{e} group and $SU(3)$-description (quark scheme) of the particle as a vector of the supermultiplet (irreducible representation of $SU(3)$). This correspondence is realized on the ground of a spin-charge Hilbert space. Basic hadron supermultiplets of $SU(3)$-theory (baryon octet and two meson octets) are studied in this framework. It is shown that quark phenomenologies are naturally incorporated into presented scheme. The relationship between mass and spin allows one to take a new look at the problem of mass spectrum of elementary particles.

V. V. Varlamov

2014-09-04T23:59:59.000Z

448

Structural Dynamics Experimental Activities in Ultra-Lightweight and Inflatable Space Structures  

Science Journals Connector (OSTI)

This paper reports recently completed structural dynamics experimental activities with new ultra-lightweight and inflatable space structures (a.k.a., "Gossamer" spacecraft) at NASA Langley Research Center, NASA Marshall Space Flight Center, and NASA ...

Pappa Richard S.; Lassiter John O.; Ross Brain P.

2001-05-01T23:59:59.000Z

449

Using Chemical Shifts to Assess Transient Secondary Structure and Generate Ensemble Structures of Intrinsically Disordered Proteins  

Science Journals Connector (OSTI)

The chemical shifts of backbone atoms in polypeptides are sensitive to the dihedral angles phi and psi and can be used to estimate transient secondary structure and to generate structural ensembles of intrinsical...

Stepan Kashtanov; Wade Borcherds; Hongwei Wu…

2012-01-01T23:59:59.000Z

450

Optical feedback structures and methods of making  

DOE Patents (OSTI)

An optical resonator can include an optical feedback structure disposed on a substrate, and a composite including a matrix including a chromophore. The composite disposed on the substrate and in optical communication with the optical feedback structure. The chromophore can be a semiconductor nanocrystal. The resonator can provide laser emission when excited.

Snee, Preston T; Chan, Yin Thai; Nocera, Daniel G; Bawendi, Moungi G

2014-11-18T23:59:59.000Z

451

CRACKING OF PIc NUCLEAR CONTAINMENT STRUCTURES  

E-Print Network (OSTI)

CRACKING OF PIc NUCLEAR CONTAINMENT STRUCTURES By Sami H. Rizkalla,l Sidney H. Simmonds': and James structures for some Canadian nuclear reactors consist of a heavy concrete base, a cylindrical wall, a ring the design accident pressure. This would result in the walls and dome of the containment being stressed

452

A Structural Perspective on Enzymes Activated by  

E-Print Network (OSTI)

A Structural Perspective on Enzymes Activated by Monovalent Cations* Published, JBC Papers in Press and Molecular Biophysics, Washington University School of Medicine, St. Louis, Missouri 63110 Enzymes activated and catalysis. Recent progress in the structural biology of such enzymes has answered long standing questions

Di Cera, Enrico

453

Orc Notation Structured Wide-Area Programming  

E-Print Network (OSTI)

Orc Notation Structured Wide-Area Programming Jayadev Misra Department of Computer Science University of Texas at Austin http://orc.csres.utexas.edu April 12, 2010 Rennes, France #12;Orc Notation hierarchical structure. #12;Orc Notation Orc · Goal: Internet scripting language. · Next: Component integration

Misra, Jayadev

454

Structured Wide-Area Programming: Orc Calculus  

E-Print Network (OSTI)

Structured Wide-Area Programming: Orc Calculus Jayadev Misra Department of Computer Science University of Texas at Austin http://orc.csres.utexas.edu #12;Concurrency · ubiquitous. · difficult interactions. · Support hierarchical structure. #12;Orc · Initial Goal: Internet scripting language. · Next

Misra, Jayadev

455

Stochastic service load simulation for engineering structures  

Science Journals Connector (OSTI)

...at the design stage of an engineering structure, both global and...is relevant to other core engineering industry sectors. This paper...simulated Jack-up offshore load history (JOSH) developed for use...fatigue|fracture mechanics|engineering structures|

2001-01-01T23:59:59.000Z

456

Metering Schemes for General Access Structures  

E-Print Network (OSTI)

Metering Schemes for General Access Structures Barbara Masucci Dipartimento di Informatica ed, Canada E­mail: dstinson@cacr.math.uwaterloo.ca Abstract A metering scheme is a method by which an audit time frame. In this paper we construct metering schemes for more general access structures, which

Stinson, Douglas

457

Applying Global Optimization in Structural Engineering  

E-Print Network (OSTI)

structure Dynamic loading Challenges "Dwarfing visitors, the 70-foot-tall Corliss steam engine powered steam engine in the world. Of engines like the Corliss, William Dean Howells wrote, 'In these thingsApplying Global Optimization in Structural Engineering Dr. George F. Corliss Electrical

458

Study Of Structural Control In Coupled Buildings  

E-Print Network (OSTI)

(earthquake and wind). In a conventional structure the energy is absorbed by the inelastic deformation of control devices implemented as the coupled-link between the two buildings. In this study two different, semi-active damper. 1. INTRODUCTION Structural engineering face the challenge on finding new and better

Spencer Jr., B.F.

459

Structural and functional relationships between Ca2  

E-Print Network (OSTI)

Structural and functional relationships between Ca2 puffs and mitochondria in Xenopus oocytes. Structural and functional relationships between Ca2 puffs and mitochondria in Xenopus oocytes. Am J Physiol.2001.--Ca2 uptake and release from endoplasmic reticulum (ER) and mitochondrial Ca2 stores play important

Marchant, Jonathan

460

NONLOCAL COMPUTATIONAL METHODS APPLIED TO COMPOSITE STRUCTURES  

E-Print Network (OSTI)

to model the degradation of organic or ceramic matrix composites structures (OMC or CMC) even under simple description of heterogeneous materia ls like organic or ceramic matrix composites. New sophisticatedNONLOCAL COMPUTATIONAL METHODS APPLIED TO COMPOSITE STRUCTURES N. GERMAIN1, F. FEYEL1 and J. BESSON

Boyer, Edmond

Note: This page contains sample records for the topic "breakdown structure cbs" 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

Cooled snubber structure for turbine blades  

DOE Patents (OSTI)

A turbine blade assembly in a turbine engine. The turbine blade assembly includes a turbine blade and a first snubber structure. The turbine blade includes an internal cooling passage containing cooling air. The first snubber structure extends outwardly from a sidewall of the turbine blade and includes a hollow interior portion that receives cooling air from the internal cooling passage of the turbine blade.

Mayer, Clinton A; Campbell, Christian X; Whalley, Andrew; Marra, John J

2014-04-01T23:59:59.000Z

462

Polarized structure functions in nuclear matter  

SciTech Connect

We present a comprehensive analysis of the structure functions for the polarized nuclei {sup 3}He, and focus on the polarized distribution functions and light-cone momentum distributions of protons and neutrons. We demonstrate that the first moment of the {sup 3}He structure function can provide an incisive test of the Bjorken sum rule.

Tehrani, S. Atashbar [School of Particles and Accelerators, IPM (Institute for Studies in Theoretical Physics and Mathematics), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Khorramian, A. N.; Monfared, S. Taheri [School of Particles and Accelerators, IPM (Institute for Studies in Theoretical Physics and Mathematics), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Physics Department, Semnan University, Semnan (Iran, Islamic Republic of); Arbabifar, F. [Physics Department, Semnan University, Semnan (Iran, Islamic Republic of)

2011-10-24T23:59:59.000Z

463

Gaussian beams in inhomogeneous anisotropic layered structures  

E-Print Network (OSTI)

Gaussian beams in inhomogeneous anisotropic layered structures Vlastislav Cerven´y 1 ) and Ivan@ig.cas.cz. Summary Gaussian beams concentrated close to rays of high-frequency seismic body waves prop- agating in an inhomogeneous anisotropic layered structure are studied. The amplitude profiles of the Gaussian beam along

Cerveny, Vlastislav

464

Heat pipe with embedded wick structure  

DOE Patents (OSTI)

A heat pipe has an embedded wick structure that maximizes capillary pumping capability. Heat from attached devices such as integrated circuits evaporates working fluid in the heat pipe. The vapor cools and condenses on a heat dissipation surface. The condensate collects in the wick structure, where capillary pumping returns the fluid to high heat areas. 7 figs.

Adkins, D.R.; Shen, D.S.; Tuck, M.R.; Palmer, D.W.; Grafe, V.G.

1998-06-23T23:59:59.000Z

465

Bayesian Methods for Aircraft Structural Health  

E-Print Network (OSTI)

.1 Introduction Aircraft structures, whether metallic or composite, are subject to service damage which requires on the inspection results obtained. If damage is detected from an inspection, the decision whether to repair as well dynamically, and compared to a model of the structure such that damage can be located and a determination made

Henderson, Thomas C.

466

Structure of Random Porous Materials: Silica Aerogel  

Science Journals Connector (OSTI)

Using small-angle x-ray scattering, we show that porous silica aerogel has a fractal backbone structure. The observed structure is traced to the underlying chemical (polymerization) and physical (colloid aggregation) growth processes. Comparison of scattering curves for aerogel with silica aggregates confirms this interpretation.

Dale W. Schaefer and Keith D. Keefer

1986-05-19T23:59:59.000Z

467

Drilling subsurface wellbores with cutting structures  

DOE Patents (OSTI)

A system for forming a wellbore includes a drill tubular. A drill bit is coupled to the drill tubular. One or more cutting structures are coupled to the drill tubular above the drill bit. The cutting structures remove at least a portion of formation that extends into the wellbore formed by the drill bit.

Mansure, Arthur James (Alburquerque, NM); Guimerans, Rosalvina Ramona (The Woodlands, TX)

2010-11-30T23:59:59.000Z

468

Magnetic structure of Coronal Mass Ejections  

E-Print Network (OSTI)

We present several models of the magnetic structure of solar coronal mass ejections (CMEs). First, we model CMEs as expanding force-free magnetic structures. While keeping the internal magnetic field structure of the stationary solutions, expansion leads to complicated internal velocities and rotation, while the field structures remain force-free. Second, expansion of a CME can drive resistive dissipation within the CME changing the ionization states of different ions. We fit in situ measurements of ion charge states to the resistive spheromak solutions. Finally, we consider magnetic field structures of fully confined stable magnetic clouds containing both toroidal and poloidal magnetic fields and having no surface current sheets. Expansion of such clouds may lead to sudden onset of reconnection events.

Lyutikov, Maxim

2012-01-01T23:59:59.000Z

469

Impact of community structure on information transfer  

E-Print Network (OSTI)

The observation that real complex networks have internal structure has important implication for dynamic processes occurring on such topologies. Here we investigate the impact of community structure on a model of information transfer able to deal with both search and congestion simultaneously. We show that networks with fuzzy community structure are more efficient in terms of packet delivery that those with pronounced community structure. We also propose an alternative packet routing algorithm which takes advantage of the knowledge of communities to improve information transfer and show that in the context of the model an intermediate level of community structure is optimal. Finally, we show that in a hierarchical network setting, providing knowledge of communities at the level of highest modularity will improve network capacity by the largest amount.

Danon, Leon; Diaz-Guilera, Albert

2007-01-01T23:59:59.000Z

470

Method of transferring strained semiconductor structure  

DOE Patents (OSTI)

The transfer of strained semiconductor layers from one substrate to another substrate involves depositing a multilayer structure on a substrate having surface contaminants. An interface that includes the contaminants is formed in between the deposited layer and the substrate. Hydrogen atoms are introduced into the structure and allowed to diffuse to the interface. Afterward, the deposited multilayer structure is bonded to a second substrate and is separated away at the interface, which results in transferring a multilayer structure from one substrate to the other substrate. The multilayer structure includes at least one strained semiconductor layer and at least one strain-induced seed layer. The strain-induced seed layer can be optionally etched away after the layer transfer.

Nastasi, Michael A. (Santa Fe, NM); Shao, Lin (College Station, TX)

2009-12-29T23:59:59.000Z

471

Nozzle and shroud assembly mounting structure  

DOE Patents (OSTI)

The present nozzle and shroud assembly mounting structure configuration increases component life and reduces maintenance by reducing internal stress between the mounting structure having a preestablished rate of thermal expansion and the nozzle and shroud assembly having a preestablished rate of thermal expansion being less than that of the mounting structure. The mounting structure includes an outer sealing portion forming a cradling member in which an annular ring member is slidably positioned. The mounting structure further includes an inner mounting portion to which a hooked end of the nozzle and shroud assembly is attached. As the inner mounting portion expands and contracts, the nozzle and shroud assembly slidably moves within the outer sealing portion.

Faulder, Leslie J. (San Diego, CA); Frey, deceased, Gary A. (late of Seattle, WA); Nielsen, Engward W. (El Cajon, CA); Ridler, Kenneth J. (San Diego, CA)

1997-01-01T23:59:59.000Z

472

Nozzle and shroud assembly mounting structure  

DOE Patents (OSTI)

The present nozzle and shroud assembly mounting structure configuration increases component life and reduces maintenance by reducing internal stress between the mounting structure having a preestablished rate of thermal expansion and the nozzle and shroud assembly having a preestablished rate of thermal expansion being less than that of the mounting structure. The mounting structure includes an outer sealing portion forming a cradling member in which an annular ring member is slidably positioned. The mounting structure further includes an inner mounting portion to which a hooked end of the nozzle and shroud assembly is attached. As the inner mounting portion expands and contracts, the nozzle and shroud assembly slidably moves within the outer sealing portion. 3 figs.

Faulder, L.J.; Frey, G.A.; Nielsen, E.W.; Ridler, K.J.

1997-08-05T23:59:59.000Z

473

Propagation and structure of planar streamer fronts  

Science Journals Connector (OSTI)

Streamers are a mode of dielectric breakdown of a gas in a strong electric field: A sharp nonlinear ionization wave propagates into a nonionized gas, leaving a nonequilibrium plasma behind. The ionization avalanche in the tip of the wave is due to free electrons being accelerated in the strong field and ionizing the gas by impact. This chain reaction deeper in the wave is suppressed by the generated free charges screening the field. Simulations of streamers show two widely separated spatial scales: the width of the charged layer where the electron density gradients and the ionization rate are very large [O(?m)], and the width of the electrically screened, finger-shaped, and ionized region [O(mm)]. We thus recently have suggested analyzing first the properties of the charge-ionization layer on the inner scale on which it is almost planar, and then understanding the streamer shape on the outer scale as the motion of an effective interface, as is done in other examples of nonequilibrium pattern formation. The first step thus is the analysis of the inner dynamics of planar streamer fronts. For these, we resolve the long-standing question about what determines the front speed, by applying the modern insights of pattern formation to the streamer equations used in the recent simulations. These include field-driven impact ionization, electron drift and diffusion, and the Poisson equation for the electric field. First, in appropriately chosen dimensionless units only one parameter remains to characterize the gas, the dimensionless electron diffusion constant D; for typical gases under normal conditions D?0.1–0.3. Then we determine essentially all relevant properties of planar streamer fronts. Technically, we identify the propagation of streamer fronts as an example of front propagation into unstable states. In terms of the marginal stability scenario we then find that the front approached asymptotically starting from any sufficiently localized initial condition (the ``selected front'') is the steepest uniformly translating front solution, which is physical and stable. Negatively charged fronts are selected by linear marginal stability, which allows us to derive their velocity analytically. Positively charged fronts can only propagate due to electron diffusion against the electric field; as a result their behavior is singular in the limit of D?0. For D?1, these fronts are selected by nonlinear marginal stability and we have to apply numerical methods for predicting the selected front velocity. For larger D, linear marginal stability applies and the velocity can be determined analytically. Numerical integrations of the temporal evolution of planar fronts out of localized initial conditions confirm all our analytical and numerical predictions for the selection. Finally, our general predictions for the selected front velocity and for the degree of ionization of the plasma are in semiquantitative agreement with recent numerical solutions of three-dimensional streamer propagation. This gives credence to our suggestion that the front analysis on the inner (?m) scale yields the moving boundary conditions for a moving ``streamer interface,'' whose pattern formation is governed by the evolution of the fields on the outer (mm) scale.

Ute Ebert, Wim van Saarloos, and Christiane Caroli

1997-02-01T23:59:59.000Z

474

Structural efficiency of a wind turbine blade  

Science Journals Connector (OSTI)

Alternative structural layouts for wind turbine blades are investigated with the aim of improving their design, minimizing weight and reducing the cost of wind energy. New concepts were identified using topology optimization techniques on a 45 m wind turbine blade. Additionally, non-dimensional structural shape factors were developed for non-symmetric sections under biaxial bending to evaluate structural concepts in terms of ability to maximize stiffness and minimize stress. The topology optimization evolves a structure which transforms along the length of the blade, changing from a design with spar caps at the maximum thickness and a trailing edge mass, to a design with offset spar caps toward the tip. The shape factors indicate that the trailing edge reinforcement and the offset spar cap topology are both more efficient at maximizing stiffness and minimizing stress. In summary, an alternative structural layout for a wind turbine blade has been found and structural shape factors have been developed, which can quantitatively assess the structural efficiency under asymmetric bending.

Neil Buckney; Alberto Pirrera; Steven D. Green; Paul M. Weaver

2013-01-01T23:59:59.000Z

475

The Structure of Cholesterol in Lipid Rafts  

E-Print Network (OSTI)

Rafts, or functional domains, are transient nano- or mesoscopic structures in the plasma membrane and are thought to be essential for many cellular processes such as signal transduction, adhesion, trafficking and lipid/protein sorting. Observations of these membrane heterogeneities have proven challenging, as they are thought to be both small and short-lived. With a combination of coarse-grained molecular dynamics simulations and neutron diffraction using deuterium labeled cholesterol molecules we observe raft-like structures and determine the ordering of the cholesterol molecules in binary cholesterol-containing lipid membranes. From coarse-grained computer simulations, heterogenous membranes structures were observed and characterized as small, ordered domains. Neutron diffraction was used to study the lateral structure of the cholesterol molecules. We find pairs of strongly bound cholesterol molecules in the liquid-disordered phase, in accordance with the umbrella model. Bragg peaks corresponding to ordering of the cholesterol molecules in the raft-like structures were observed and indexed by two different structures: a monoclinic structure of ordered cholesterol pairs of alternating direction in equilibrium with cholesterol plaques, i.e., triclinic cholesterol bilayers.

Laura Toppozini; Sebastian Meinhardt; Clare L. Armstrong; Zahra Yamani; Norbert Kucerka; Friederike Schmid; Maikel C. Rheinstaedter

2014-12-16T23:59:59.000Z

476

Magnetic Structure Determination from Neutron Diffraction Data  

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

logo logo Magnetic Structure Determination from Neutron Diffraction Data September 17 - 20, 2012 logo Oak Ridge National Laboratory - Oak Ridge, Tennessee, USA About the Workshop Program Lecture Notes Useful Links Organizers Travel & Lodging Wireless Networking Photos filler About the Workshop molecule The Magnetic Structure Determination Workshop 2012 concluded on September 20. The aim of this workshop was to enhance the community studying magnetism in materials by learning from experts the essential theoretical foundations to magnetic representation analysis and work through real examples to gain experience in solving and refining magnetic structures from neutron powder and single crystal diffraction data. Invited speakers: Juan Rodríguez-Carvajal (ILL, Grenoble)

477

ALECS: assembly language extensions and control structures  

SciTech Connect

ALECS is an assembly language preprocessor allowing the use of structured programming techniques in MACRO-11 code. Programs are written using standard control structures with normal MACRO-11 code embedded as needed. The ALECS task is used to translate the source to pure MACRO-11 source file which is then submitted to the assembler. ALECS also produces a structured source listing showing the true logical flow of code. ALECS has been used for short subroutines as well as RSX-11M I/0 drivers and an ACP.

Oothoudt, M.A.; Kozlowski, T.

1982-01-01T23:59:59.000Z

478

Efficient inference of protein structural ensembles  

E-Print Network (OSTI)

It is becoming clear that traditional, single-structure models of proteins are insufficient for understanding their biological function. Here, we outline one method for inferring, from experiments, not only the most common structure a protein adopts (native state), but the entire ensemble of conformations the system can adopt. Such ensemble mod- els are necessary to understand intrinsically disordered proteins, enzyme catalysis, and signaling. We suggest that the most difficult aspect of generating such a model will be finding a small set of configurations to accurately model structural heterogeneity and present one way to overcome this challenge.

Lane, Thomas J; Beauchamp, Kyle A; Pande, Vijay S

2014-01-01T23:59:59.000Z

479

Stability of the MgSiO3 analog NaMgF3 and its implication for mantle structure in super-Earths  

E-Print Network (OSTI)

First-principles calculations on MgSiO(subscript 3) suggested a breakdown into MgO + SiO(subscript 2) at pressure above 1000 GPa with an extremely large negative Clapeyron slope, isolating the lowermost mantles of larger ...

Grocholski, Brent

480

Photovoltaic Cell Structure Basics | Department of Energy  

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

Structure Basics Structure Basics Photovoltaic Cell Structure Basics August 19, 2013 - 4:50pm Addthis The actual structural design of a photovoltaic (PV), or solar cell, depends on the limitations of the material used in the PV cell. The four basic device designs are: Homojunction Devices Crystalline silicon is the primary example of this kind of cell. A single material-crystalline silicon-is altered so that one side is p-type, dominated by positive holes, and the other side is n-type, dominated by negative electrons. The p/n junction is located so that the maximum light is absorbed near it. The free electrons and holes generated by light deep in the silicon diffuse to the p/n junction and then separate to produce a current if the silicon is of sufficiently high quality. In this homojunction design, these aspects of the cell may be varied to

Note: This page contains sample records for the topic "breakdown structure cbs" 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.


481

Introduction to Renewable Energy Project Finance Structures  

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

Introduction to Renewable Introduction to Renewable Energy Project Finance Structures Jason Coughlin Jason.Coughlin@nrel.gov October 3rd, 2012 2 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov Project Finance Structures * Why is this topic relevant? - Increase your understanding of the project finance process with a "behind the scenes" look at common structures used when financing renewable energy projects with a Power Purchase Agreement (PPA). - Introduce terminology. - Project finance structures can influence certain terms in the PPA. - May need to novate contracts, provide consent and/or agree to assignment of documents given that ownership can change over the life of the project. 3 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov Existing Resources

482

Property:ControlStructure | Open Energy Information  

Open Energy Info (EERE)

Property Property Edit with form History Facebook icon Twitter icon » Property:ControlStructure Jump to: navigation, search Property Name ControlStructure Property Type Page Description Describes underlying structure that controls permeability and hydrology of the reservoir (as described in REF) This is a property of type Page. Subproperties This property has the following 12 subproperties: B Beowawe Hot Springs Geothermal Area Brady Hot Springs Geothermal Area C Chena Geothermal Area D Desert Peak Geothermal Area E East Mesa Geothermal Area H Heber Geothermal Area R Raft River Geothermal Area S Salton Sea Geothermal Area San Emidio Desert Geothermal Area S cont. Soda Lake Geothermal Area Steamboat Springs Geothermal Area Stillwater Geothermal Area Pages using the property "ControlStructure"

483

Introduction to Renewable Energy Project Finance Structures  

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

Introduction to Renewable Introduction to Renewable Energy Project Finance Structures Jason Coughlin Jason.Coughlin@nrel.gov October 3rd, 2012 2 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov Project Finance Structures * Why is this topic relevant? - Increase your understanding of the project finance process with a "behind the scenes" look at common structures used when financing renewable energy projects with a Power Purchase Agreement (PPA). - Introduce terminology. - Project finance structures can influence certain terms in the PPA. - May need to novate contracts, provide consent and/or agree to assignment of documents given that ownership can change over the life of the project. 3 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov Existing Resources

484

Dipole rescattering and the nuclear structure function  

SciTech Connect

In the framework of the dipole model, we study the effects of the dipole multiple scatterings in a nuclear target and compute the nuclear structure function. We compare different unitarization schemes and confront our results with the E665 data.

Carvalho, F. [Depto de Ciencias Exatas e da Terra, Universidade Federal de Sao Paulo, SP (Brazil); Goncalves, V. P. [Instituto de Fisica e Matematica, Universidade Federal de Pelotas, Caixa Postal 354, CEP 96010-900, Pelotas, RS (Brazil); Navarra, F. S.; Oliveira, E. G. [Instituto de Fisica, Universidade de Sao Paulo Rua do Matao, Travessa R, 187, 05508-090 Sao Paulo, SP (Brazil)

2013-03-25T23:59:59.000Z

485

Nuclear Structure and Nuclear Reactions | Argonne Leadership...  

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

the ab initio no-core full configuration approach," Phys. Rev. C 86, 034325 (2012) Nuclear Structure and Nuclear Reactions PI Name: James Vary PI Email: jvary@iastate.edu...

486

Genetic optimization of photonic bandgap structures  

E-Print Network (OSTI)

design methodology allows us to optimize PC structures for specific objectives. In this paper, we report," Phys. Rev. Lett. 58, 2059­2062 (1987). 3. D. Englund, D. Fattal, E. Waks, G. Solomon, B. Zhang, T

Vuckovic, Jelena

487

Structure and function of gas vacuoles.  

Science Journals Connector (OSTI)

...overlying gas phase to atmospheric pressure. Volume...film of surrounding water. From the results...to force liquid water in- side the structure...would also prevent water from accumulating inside by condensation (105). FORMATION...

A E Walsby

1972-03-01T23:59:59.000Z

488

Special Mineral Properties And Related Structures  

Science Journals Connector (OSTI)

The specific properties detected in definite minerals are the function of mineral structures. The properties are useful in identification of these minerals and have important applications in various fields.

Swapna Mukherjee

2011-01-01T23:59:59.000Z

489

Early stages in cosmic structure formation  

E-Print Network (OSTI)

This thesis investigates the origin and evolution of large scale structure in the universe. We approach these questions from two different angles in two related but independent projects. The outcomes of these two investigations ...

Burgess, Kristin M

2004-01-01T23:59:59.000Z

490

Structural Automotive Components from Composite Materials | Department...  

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

Annual Merit Review and Peer Evaluation Meeting, May 18-22, 2009 -- Washington D.C. lm08kia.pdf More Documents & Publications Structural Automotive Components from Composite...

491

Natural language search of structured documents  

E-Print Network (OSTI)

This thesis focuses on techniques with which natural language can be used to search for specific elements in a structured document, such as an XML file. The goal is to create a system capable of being trained to identify ...

Oney, Stephen W

2008-01-01T23:59:59.000Z

492

Detecting and parsing embedded lightweight structures  

E-Print Network (OSTI)

Text documents, web pages, and source code are all documents that contain language structures that can be parsed with corresponding parsers. Some documents, like JSP pages, Java tutorial pages, and Java source code, often ...

Rha, Philip

2005-01-01T23:59:59.000Z

493

Evolution of atomic structure during nanoparticle formation  

Science Journals Connector (OSTI)

The complete structural transformation of ionic species in the precursor solution, over an amorphous solid and finally into crystalline nanoparticles, is elucidated by in situ investigations under supercritical solvothermal conditions.

Tyrsted, C.

2014-04-14T23:59:59.000Z

494

Wind pressure distribution on shell structures  

E-Print Network (OSTI)

relates to both cost and safety. This study has revealed that wind pressure criteria for shell structures is not adequately covered by most building codes. Those that do exist are rather vague and sometimes erroneous. One recently published design manual...

Yancey, Kenneth Earl, Jr

1963-01-01T23:59:59.000Z

495

Nuclear Structure and Nuclear Reactions | Argonne Leadership...  

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

value of 92.16 MeV and the point rms radius is 2.35 fm vs 2.33 from experiment. Nuclear Structure and Nuclear Reactions PI Name: James Vary PI Email: jvary@iastate.edu...

496

The Brueckner Theory of Nuclear Structure  

Science Journals Connector (OSTI)

8 May 1956 research-article The Brueckner Theory of Nuclear Structure R. J. Eden The object of the Brueckner theory is to calculate the properties...insufficient. Previous papers on the Brueckner theory have used a formalism applicable...

1956-01-01T23:59:59.000Z

497

NONCOMMUTATIVE NUMERICAL MOTIVES, TANNAKIAN STRUCTURES, AND  

E-Print Network (OSTI)

the correct noncommutative analogues CNC and DNC of Grothendieck's standard conjectures C and D. Assuming CNC. Noncommutative standard conjecture CNC 13 9. Tannakian structure 14 10. Noncommutative homological motives 17 11

498

Fire performance of gable frame structures  

E-Print Network (OSTI)

Fire protection engineering and structural engineering are two relevant but separated fields of study. Many experiments conducted by fire protection engineers are under certain ideal boundary conditions, which may not be ...

Qian, Congyi

2013-01-01T23:59:59.000Z

499

Structures with negative index of refraction  

DOE Patents (OSTI)

The invention provides simplified negative index materials (NIMs) using wire-pair structures, 4-gap single ring split-ring resonator (SRR), fishnet structures and overleaf capacitor SRR. In the wire-pair arrangement, a pair of short parallel wires and continuous wires are used. In the 4-gap single-ring SRR, the SRRs are centered on the faces of a cubic unit cell combined with a continuous wire type resonator. Combining both elements creates a frequency band where the metamaterial is transparent with simultaneously negative .di-elect cons. and .mu.. In the fishnet structure, a metallic mesh on both sides of the dielectric spacer is used. The overleaf capacitor SRR changes the gap capacities to small plate capacitors by making the sections of the SRR ring overlap at the gaps separated by a thin dielectric film. This technique is applicable to conventional SRR gaps but it best deploys for the 4-gap single-ring structures.

Soukoulis, Costas M. (Ames, IA); Zhou, Jiangfeng (Ames, IA); Koschny, Thomas (Ames, IA); Zhang, Lei (Ames, IA); Tuttle, Gary (Ames, IA)

2011-11-08T23:59:59.000Z

500

NUCLEAR STRUCTURE AND HEAVY-ION FUSION  

E-Print Network (OSTI)

Nuclear Structure and Heavy-Ton Fusion* A series of lecturesthe cross section for fusion in the experiments consideredEffects g in III. Subharrier Fusion Cross Sections for Light

Stokstad, R.G.

2010-01-01T23:59:59.000Z