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1 (Grids_Overview.v.11.VG.fm, 4/14/00)wejohnston@lbl.gov, www.itg.lbl.gov/~wej LBNL and NASA Ames Research Center Computational, Data, and  

E-Print Network [OSTI]

1 (Grids_Overview.v.11.VG.fm, 4/14/00)wejohnston@lbl.gov, www.itg.lbl.gov/~wej LBNL and NASA Ames@computer.org 2 (Grids_Overview.v.11.VG.fm, 4/14/00)wejohnston@lbl.gov, www.itg.lbl.gov/~wej LBNL and NASA Ames;3 (Grids_Overview.v.11.VG.fm, 4/14/00)wejohnston@lbl.gov, www.itg.lbl.gov/~wej LBNL and NASA Ames Research


1 (Grids_Overview.v.11.VG.fm, 4/14/00)wejohnston@lbl.gov, www.itg.lbl.gov/~wej LBNL and NASA Ames Research Center Computational, Data, and  

E-Print Network [OSTI]

1 (Grids_Overview.v.11.VG.fm, 4/14/00)wejohnston@lbl.gov, www.itg.lbl.gov/~wej LBNL and NASA Ames@computer.org 2 (Grids_Overview.v.11.VG.fm, 4/14/00)wejohnston@lbl.gov, www.itg.lbl.gov/~wej LBNL and NASA Ames (Grids_Overview.v.11.VG.fm, 4/14/00)wejohnston@lbl.gov, www.itg.lbl.gov/~wej LBNL and NASA Ames Research


1 (Grids_Overview.v.11.VG.fm, 4/14/00)wejohnston@lbl.gov, www.itg.lbl.gov/~wej LBNL and NASA Ames Research Center Computational, Data, and  

E-Print Network [OSTI]

1 (Grids_Overview.v.11.VG.fm, 4/14/00)wejohnston@lbl.gov, www.itg.lbl.gov/~wej LBNL and NASA Ames@computer.org #12;2 (Grids_Overview.v.11.VG.fm, 4/14/00)wejohnston@lbl.gov, www.itg.lbl.gov/~wej LBNL and NASA Ames;3 (Grids_Overview.v.11.VG.fm, 4/14/00)wejohnston@lbl.gov, www.itg.lbl.gov/~wej LBNL and NASA Ames Research


Sandia VG Template  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systems controller systemsis a multiprogram laboratory operated by Sandia


Energy Storage Management for VG Integration (Presentation)  

SciTech Connect (OSTI)

This presentation describes how you economically manage integration costs of storage and variable generation.

Kirby, B.



(Vg = 2 volts, Fp = 3,7 volts). Dans le circuit  

E-Print Network [OSTI]

the process is incom- plete. But since it is advantageous to have thermionic convertors workingat temperatures and the latter was used simultaneously for the ionization process. In general, when the energy to be converted

Paris-Sud XI, Université de


Energy Storage Management for VG Integration (Presentation), NREL (National Renewable Energy Laboratory)  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing Zirconia NanoparticlesSmart Grocer Program Sign-up FormEnergy Storage Management


Lemma 2. If vg [(1/14)v(2)g , (2/7)v(2)g ], then there exists a fully revealing ex ante equilibrium such that voter vg demands two votes, v(2)g randomizes between demanding one  

E-Print Network [OSTI]

M S = v(2)m p/2 + (1 - v(2)m )p EUviM D2 = vM v(2)m (viM /2 - p) + vM (1 - v(2)m )(viM - 2p)/3+ + (1 - vM )2v(2)m (viM - p)/3 EUviM D1 = vM v(2)m (-p) + vM (1 - v(2)m )(-2p/3)+ + (1 - vM )v(2)m (2viM - p)/3 + (1 - vM )(1 - v(2)m )(viM - p)/2 EUviM 0 = (1 - vM )v(2)m viM /2 EUviM S = vM v(2)m p/2 + vM (1 - v(2

Faraon, Andrei


Ammonia and urea treatment of wheat straw and corn stover JP Fontenot E Gallo Llorente, JM Obamahinti, VG Allen  

E-Print Network [OSTI]

by ammoniation directly or by urea treatment, but the improvement appears to be greater for ammonia than urea

Boyer, Edmond


Postal address P.O. Box 118, SE-221 00 LUND Visiting address John Ericssons vg 3 Telephone switchboard +46 46-222 00 00 E-mail outgoing@kansli.lth.se Internet http://www.lth.se  

E-Print Network [OSTI]

switchboard +46 46-222 00 00 E-mail outgoing@kansli.lth.se Internet http://www.lth.se International Office Telephone switchboard +46 46-222 00 00 E-mail outgoing@kansli.lth.se Internet http://www.lth.se ARGENTINA Sciences (Lahti Yrkeshögskola) Oulun yliopisto Tampereen Teknillinen Korkeakoulu University of Lapland


REVUE DE PHYSIQUE APPLIQUE Simulation d'un transistor MOS silicium-sur-isolant dsertion profonde  

E-Print Network [OSTI]

tensions de grilles avant (Vg1) et arrière (Vg2) appliquées. Nous dédui- sons aussi les caractéristiques Id(Vg1, Vg2) à faible tension de drain. Les caractéristiques Id(Vg2) simulées sont comparées aux caractéristiques Id(Vg2) obtenues avec des transistors CMOS/SOS. Le saphir de ces dispositifs a été localement

Boyer, Edmond


Postadress Box 118 Besksadress John Ericssons vg 3 Telefon dir INT-46-46-222 3423, vxel INT-46-46-222 00 00 Telefax INT-46-46-222 4531 E-post anders.axelsson@rektor.lth.se Internet http://www.lth.se  

E-Print Network [OSTI]

. Ingenjörsvetenskapsakademiens (IVA) Stora guldmedalj delas i år ut till Sune Carlsson, framstående företagsledare inom svenskt näringsliv. Sune Carlsson får IVAs främsta utmärkelse för sina betydelsefulla insatser inom kärnan av svensk


2006 Long Range Development Plan Final Environmental Impact Report  

E-Print Network [OSTI]

locations. V.G.2 Impacts Environmental effects at the hillThis EIR IV. Environmental Setting, Impacts, and Mitigation1, Summary of Environmental Impacts and Mitigation Measures,

Philliber, Jeff



Changes in the Economic Value of Variable Generation at High Penetration Levels: A Pilot Case Study of California  

E-Print Network [OSTI]

the small amount of incumbent coal generation, and increasedamount of incumbent coal generation is also displaced by VG.including incumbent coal and nuclear generation. Expanding

Mills, Andrew



U.S. Department of Energy Categorical Exclusion ...  

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

AikenSouth Carolina The Analytical Development VG PlasmaQuad II Inductively Coupled Plasma Mass Spectrometers (ICPMS) perform elemental and isotopic analysis on liquid samples....


United States Department of the Interior Fish and Wildlife Service  

E-Print Network [OSTI]

Serves 6 3 tablespoons minced celery 1/3 teaspoon salt 6 drops tabasco sauce Mix the last fiVG ingredi


cDNA cloning and transcriptional regulation of the vitellogenin receptor from the imported fire ant, Solenopsis invicta Buren (Hymenoptera: Formicidae)  

E-Print Network [OSTI]

reverse transcription polymerase chain reaction (RT-PCR) and both 5?- and 3?- rapid amplification of cDNA ends (RACE), cDNA fragments encompassing the entire coding region of a putative VgR from fire ant (= SiVgR) were cloned and sequenced. The complete Si...

Chen, Mei-Er



Vitellogenin Receptor and Neuropeptide Receptors Involved in Reproduction of the Red Imported Fire Ant (Solenopsis invicta Buren)  

E-Print Network [OSTI]

castes or overall reproductive outcome, diminishing the fire ant impact as invasive pest. Fire ant virgin queens have more abundant VgR (SiVgR) transcripts than newly-mated queens, but limited egg formation. To elucidate whether queen maturation...

Lu, Hsiao Ling



1.0 GAS TRANSFER An important process used in water and wastewater treatment. Also very important when  

E-Print Network [OSTI]

1.0 GAS TRANSFER An important process used in water and wastewater treatment. Also very important = CL (CL + HcVG) (6) where CL = liquid phase concentration, VL = liquid volume, CG = gas phase concentration, VG = gas volume, Hc = dimensionless Henry's law coefficient and M = mass of gas. Now use two

Stenstrom, Michael K.

Note: This page contains sample records for the topic "vg vg vg" 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.


Systematic Comparison of Operating Reserve Methodologies: Preprint  

SciTech Connect (OSTI)

Operating reserve requirements are a key component of modern power systems, and they contribute to maintaining reliable operations with minimum economic impact. No universal method exists for determining reserve requirements, thus there is a need for a thorough study and performance comparison of the different existing methodologies. Increasing penetrations of variable generation (VG) on electric power systems are posed to increase system uncertainty and variability, thus the need for additional reserve also increases. This paper presents background information on operating reserve and its relationship to VG. A consistent comparison of three methodologies to calculate regulating and flexibility reserve in systems with VG is performed.

Ibanez, E.; Krad, I.; Ela, E.



Changes in the Economic Value of Variable Generation at High Penetration Levels: A Pilot Case Study of California  

E-Print Network [OSTI]

PV REC RPS RT SAM T&D TES WECC WREZ WWSIS VG VOLL AncillaryCoordinating Council (WECC). http://www.wecc.biz/committees/Coordinating Council (WECC). TEPPC TAS 2020 Dataset

Mills, Andrew




E-Print Network [OSTI]

of Norway. Permanent address of the second author is University of Montenegro, Faculty of Mathematics, Cetinjski put bb, 81000 Podgorica, Montenegro. 1 #12;2 V.G. DANILOV AND D. MITROVIC t R+ passage from


Strategies for Mitigating the Reduction in Economic Value of Variable Generation with Increasing Penetration Levels  

SciTech Connect (OSTI)

In this report, we evaluate individual options that have the potential to stem the decline in the marginal value of variable generation (VG) with increasing penetration levels. We focus only on the effectiveness of mitigation measures for wind and PV.

Mills, Andrew; Wiser, Ryan



E-Print Network 3.0 - accurate one-bit sigma-delta Sample Search...  

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

sigma-delta modulator... an adjustable sensitivity up to 8 Vg with a noise level of 4.8 lgHHz in open-loop. Keywords Sigma-delta Source: Akin, Tayfun - Department of Electrical...


CX-010116: Categorical Exclusion Determination  

Broader source: Energy.gov [DOE]

Operation, Maintenance, and End of Life of VG PlasmaQuad II ICPMS Units CX(s) Applied: B3.6 Date: 03/28/2013 Location(s): South Carolina Offices(s): Savannah River Operations Office


The Minimum Rank Problem for Outerplanar Graphs.  

E-Print Network [OSTI]

??Given a simple graph G with vertex set V(G)={1,2,...,n} define S(G) to be the set of all real symmetric matrices A such that for all (more)

Sinkovic, John Henry



Awards | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Prize at Supercomputing 2013 (SC13) in Denver, CO for the record-setting high performance computing calculation on Sequoia. (Right Image courtesy of Petros Koumoutsakos zVgCSE...


Simple Constructive Weak Factorization - Department of ...  

E-Print Network [OSTI]

as the union of open subschemes Vgi. = Ugi . The algebra. K[Vgi ]? = K[V ]? gi. = K[U]gi the localization of K[V ] so there is an open inclu- sion Vg/? ? U/? and...



Treinta aos de dramaturgia en el Per (1950-1980)  

E-Print Network [OSTI]

para la ingeniera, el vuelo necesario para proyectar la ilusin. SPRING 1998 179 En Collacocha, v.g., la cabana debe estremecerse ante sucesivos temblores; los movimientos y ruidos que logra la tramoya deben producir los efectos del sismo, sin...

Dí az, Gré gor



Graph Theory: Problem Set 2 Jan 21, 2013  

E-Print Network [OSTI]

of G if uNG(v) ((v) - (u)) = 0. Show that G has at least two poles. Solution. Let Amax = {v | (v) is maximum} VG. Since is not a constant function, Amax is a nonempty proper subset of VG. Let A Amax be the set of those vertices v for which there exists a vertex u / Amax such that vu G. Since G is connected

Harju, Tero


Impact of Wind and Solar on the Value of Energy Storage  

SciTech Connect (OSTI)

This analysis evaluates how the value of energy storage changes when adding variable generation (VG) renewable energy resources to the grid. A series of VG energy penetration scenarios from 16% to 55% were generated for a utility system in the western United States. This operational value of storage (measured by its ability to reduce system production costs) was estimated in each VG scenario, considering provision of different services and with several sensitivities to fuel price and generation mix. Overall, the results found that the presence of VG increases the value of energy storage by lowering off-peak energy prices more than on-peak prices, leading to a greater opportunity to arbitrage this price difference. However, significant charging from renewables, and consequently a net reduction in carbon emissions, did not occur until VG penetration was in the range of 40%-50%. Increased penetration of VG also increases the potential value of storage when providing reserves, mainly by increasing the amount of reserves required by the system. Despite this increase in value, storage may face challenges in capturing the full benefits it provides. Due to suppression of on-/off-peak price differentials, reserve prices, and incomplete capture of certain system benefits (such as the cost of power plant starts), the revenue obtained by storage in a market setting appears to be substantially less than the net benefit (reduction in production costs) provided to the system. Furthermore, it is unclear how storage will actually incentivize large-scale deployment of renewables needed to substantially increase VG penetration. This demonstrates some of the additional challenges for storage deployed in restructured energy markets.

Denholm, P.; Jorgenson, J.; Hummon, M.; Palchak, D.; Kirby, B.; Ma, O.; O'Malley, M.



Probabilistic Approach to Quantifying the Contribution of Variable Generation and Transmission to System Reliability: Preprint  

SciTech Connect (OSTI)

The increasing electrical load served by variable generation (VG), such as wind and solar energy, in the United States and many other countries has stimulated an interesting line of research to better quantify the capacity value of these resources. Methods applied traditionally to thermal units based on their average outage rates do not apply to VG because of their uncertain and non-dispatchable nature. The North American Electric Reliability Corporation's Integration of Variable Generation Task Force recently released a report that highlighted the need to develop and benchmark underlying loss-of-load expectation and related metrics that reasonably and fairly calculate the contribution to planning reserves, or capacity value, of solar and wind power. As the fraction of generation coming from VG becomes more significant, their estimated capacity value will have a larger impact on system planning. In this paper, we provide a method to include VG in traditional probabilistic-based adequacy methods. This method has been implemented in the Renewable Energy Probabilistic Resource Assessment tool developed at the National Renewable Energy Laboratory. Through an example based on the U.S. Western Interconnection, this method is applied to assess the effect that transmission can have on resource adequacy. We also analyze the interactions between available transmission and capacity value for VG.

Ibanez, E.; Milligan, M.



The effect of various mixers on the viscosity and flow properties of an oil well drilling fluid  

E-Print Network [OSTI]

of Texas in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE January, 1957 MaJor SubJect. Petroleum Englneerlng THE EFFECT OF VARIOUS MIXERS ON THE VISCOSITY AND FLOW PROPERTIES QF AN OIL WELL DRILLING FLUID A Thesis... on the 300 rpm Farm V-G Meter Reading 15 The Effect of Various Mixers on the 600 rpm Farm V-G Meter Reading 15 The Effect of Various Mixers on the Plastic Viscosity of a Bentonite Mud 16 Temperature Variation of the Drilling Mud Mixed in Variou...

Spannagel, Johnny Allen




E-Print Network [OSTI]

ellite, with t 6 he dist 6 uF rb 5 ances in t 6 he magnet 6 osp8 heric magneti 6 c field measuF red ress t 6 he magnet 6 osp8 here and resuF lt in a similar vG ariati 6 on in t 6 he magnet 6 osp8 heric

Richardson, John


Copeia,1988(3),pp. 636-641 A New Diminutive Frog from Hispaniola  

E-Print Network [OSTI]

Copeia,1988(3),pp. 636-641 A New Diminutive Frog from Hispaniola (Leptodactylidae species from Hispaniola and one of the smallest in the genus. THE Massifde la Hotte lies at the end HISPANIOLA *1vg- I, B t.. Fig. 1. Eleutheroda

Hedges, Blair


A high performance R-D readout circuitry for lg resolution microaccelerometers  

E-Print Network [OSTI]

A high performance R-D readout circuitry for lg resolution microaccelerometers _Ilker E. Ocak an adjustable sensitivity up to 8 V/g with a noise level of 4.8 lg/HHz in open-loop. Keywords Sigma precision accelerometers with micro-g (lg, g = 9.8 m/s2 ) resolution have many applications, including

Akin, Tayfun


Al-Hamdan, M. Z.; Crosson, W. L.; Limaye, A. S.; Rickman, D. L.; Quattrochi, D. A.; Estes, M.  

E-Print Network [OSTI]

(8):33- 41, 55-6. · Charleston AE. New Enviornmental Public Health Tracking Network Includes Spatial Analy Public Health Management Practice, 2008, 14(6), 507­514. · Charleston AE, Banerjee A, Carande-Kulis VG. J Public Health Management Practice, 2008, 14(6), 600-604. · Conti, L., Kearney, G, Whitehead


Experimental Dynamic Forced Performance of a Centrally Grooved, End Sealed Squeeze Film Damper  

E-Print Network [OSTI]

the damper lands. An ISO VG2 lubricant is supplied to the SFD via three radial holes that discharge lubricant into the central groove. The lubricant passes through the damper lands and across the piston ring seals to finally exit the damper at ambient...

Mahecha Mojica, Lady Paola



Electronics MOS Field-Effect Transistors  

E-Print Network [OSTI]

Department of Electrical and Computer Engineering #12;NMOS Physical StructureNMOS Physical Structure p-Martinez - 1 - Jose Silva-Martinez Texas A&M University Department of Electrical Engineering Analog and Mixed substrate N+ N+ VS=0 VG>0 VD=0 P P+ B D S B G N-type transistorInversion: channel is created D-S current

Palermo, Sam

Note: This page contains sample records for the topic "vg vg vg" 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.


Silicon single-electron quantum-dot transistor switch operating at room temperature  

E-Print Network [OSTI]

, which showed drain current oscillations at room temperature. These oscillations are attributed currentvoltage characteristic indicates that the energy level separation is about 110 meV and the silicon current (Id) as a function of the gate voltage (Vg) (IV) was measured at different temperatures


Vikki G. Nolan University of Memphis, School of Public Health  

E-Print Network [OSTI]

in Sickle Cell Disease; Gerontology, New England Centenarian Study 11/2000 ­ 9/2002 New York City Department with sickle cell disease in Memphis, TN. (In preparation) Smeltzer M, Nolan VG, Gurney J, Nottage K, Hankins J. Incidence of Sickle Cell Trait and Sickle Cell Disease in Shelby County, TN compared with Rio de Janeiro

Dasgupta, Dipankar


The effect of temperature on the formation resistivity factor of porous media  

E-Print Network [OSTI]

circu' t. VG Thc cs' circuit voltages w ze read using a Hewlett Peel:az! ' vvc "ac vol tm ter. The overburden prcssure i as monitored with a Hcise 5000 psi prcssure gua c. T! c core pressure was read from a Helicoid 300 psi test guage. Thc...

Brannan, Geryl Owen




E-Print Network [OSTI]

THE TUKEY ORDER FOR GRAPHS 1. Introduction Given a graph G, we let VG stand for the vertex set of G. For graphs G without isolated vertices, the Tukey order can be characterized thus: () G H iff there exist) is called a (generalized) Galois-Tukey connection (abbreviated GT-connection) from R to S if the following

Nyikos, Peter J.


hal-00267005,version1-27Mar2008 Modeling semiconductor thermal properties. The dispersion role.  

E-Print Network [OSTI]

in many domains such as nano- junctions1 , transistors2 , or in solar panels3 , and are even used in solar cells. At these low scale, Fourier's law may give an inaccurate description of heat transfer . Thus, the energy flux per apparent surface unit at point r in direction u reads: I,p(r, u) = n(r, u) Vg

Boyer, Edmond


Faculty of Mechanical Science and Engineering At the Institute of Materials Science, Chair of Materials Science and Nanotechnology  

E-Print Network [OSTI]

of Materials Science and Nanotechnology (Prof. G. Cuniberti), is open to work in the field of biomaterials and / or biologically inspired nanotechnology the position of a Senior Lecturer and Research Group leader (max. E 14 TV (Wissenschaftszeitvertragsgesetz ­ WissZeitVG). The scientific activities of the Chair of Materials Science and Nanotechnology

Schubart, Christoph


Transmission Dr. Sandra Cruz-Pol  

E-Print Network [OSTI]

Transmission Lines Dr. Sandra Cruz-Pol ECE Dept. UPRM Exercise 11.3 n A 40-m long TL has Vg=15 Vrms to electric circuits! cmc kmc GHz Hz 15000,000,2000/ 000,560/ 2 60 == == Transmission Lines I. TL parameters-wave transformer ¨ Slotted line ¨ Single stub VI. Microstrips Transmission Lines (TL) n TL have two conductors

Cruz-Pol, Sandra L.


Visualizing the Choices: Marginals, Risk Measures &  

E-Print Network [OSTI]

increase, ... area flooded,... population homeless....) Choice of measure to quote (VaR/quantile, CVa tail. Likewise, Platen EPJ-B, Taylor S. Africa data (T, VG). These differ in the detail but agree data moment for a pdf with density decaying like x-4 , x-5 ). 6 PresentationPrint.nb #12;Trying to do better

Shaw, William


Wide-Range Robust Control of Combustion Instability BOE-SHONG HONG, ASOK RAY, and VIGOR YANG*  

E-Print Network [OSTI]

time V Volume of combustion chamber Un Control input of nth mode vg Velocity of gas phase z AxialWide-Range Robust Control of Combustion Instability BOE-SHONG HONG, ASOK RAY, and VIGOR YANG This paper presents the concept and design of a two-layer robust control system for suppression of combustion

Ray, Asok


Market-Based Indian Grid Integration Study Options: Preprint  

SciTech Connect (OSTI)

The Indian state of Gujarat is forecasting solar and wind generation expansion from 16% to 32% of installed generation capacity by 2015. Some states in India are already experiencing heavy wind power curtailment. Understanding how to integrate variable generation (VG) into the grid is of great interest to local transmission companies and India's Ministry of New and Renewable Energy. This paper describes the nature of a market-based integration study and how this approach, while new to Indian grid operation and planning, is necessary to understand how to operate and expand the grid to best accommodate the expansion of VG. Second, it discusses options in defining a study's scope, such as data granularity, generation modeling, and geographic scope. The paper also explores how Gujarat's method of grid operation and current system reliability will affect how an integration study can be performed.

Stoltenberg, B.; Clark, K.; Negi, S. K.



Southern corn rootworm control  

E-Print Network [OSTI]

in all tbe plots ssjcing reylaccting neoesssrN, Expericent No, 4. vas a dupjisate of lbrperisant No, 1 aud vas oondust ed aa Nurleson else ~ soL1 and ad)aoent to Rq?raiment N'o, 2, Cbcs occrn rootsorm damaged plant vas found in a obeob plcct, R... Vg 0 7$ 0 74 0 7& 0 0 0 0 93 0 0 92 0 90 0 90 0 88 0 88 0 95 0 0 0 0 0 3 2 78 73 Vg 75 XETAIL OF TABES 1 Kxyer %naacp Ro RHLLKIS OF VARIA5CE 30, 00 33, 21 0 00 0~00 10, 00 14~ 5 V5 33, %j K, 9Q 27 A +36 ~65 RC $2 35~4~ 365T...

Wipprecht, Read



Optically controlled delays for broadband pulses  

E-Print Network [OSTI]

susceptibility is given by #4;#1;#1;#5;p#2; #12; ? #6;#7;#8;p #5; #5;2 . #1;7#2; Therefore, at a position z, the delayed probe pulse is given by p#1;t,z#2; = p0 exp ? #1;t ? z/vg#2;22T2 , #1;8#2; where the group velocity of the optical pulse is vg#12... Security Agency, and the Army Research Office. #3;1#4; T. Kamiya, F. Saito, O. Wada, and H. Yajima, Femtosecond Technology #1;Springer, Berlin, 1999#2;. #3;2#4; S. E. Harris and L. V. Hau, Phys. Rev. Lett. 82, 4611 #1;1999#2;; P. C. Ku, C. J. Chang...

Sun, Q. Q.; Rostovtsev, Y. V.; Dowling, J. P.; Scully, Marlan O.; Zubairy, M. Suhail



High-performance controllable ambipolar infrared phototransistors based on graphene-quantum dot hybrid  

E-Print Network [OSTI]

The field effect transistors (FETs) exhibited ultrahigh responsivity (107 A/W) to infrared light with great improvement of mobility in graphene / PbS quantum dot (QD) hybrid. These reported transistors are either unipolar or depletion mode devices. In this paper, we presented and fabricated conveniently-controlled grapheme / PbS QD hybrid FETs. Through the investigation on electric and optoelectronic properties, the ambipolar FETs (normally OFF) can be switched ON by raising gate voltage (VG) up to 3.7 V and -0.8 V in the first and third quadrants. Near these thresholds (VT) each carrier species shows comparable mobility (~ 300 cm2V-1s-1). Photo-responsivity reach ~ 107 A/W near each threshold and it will linearly increases with (VG-VT). These hybrid FETs become strongly competitive candidates for devices in flexible integrated circuits with low cost, large area, low-energy consumption and high performances.

Wang, Ran; Wang, Haiyang; Song, Xiaoxian; Jin, Lufan; Dai, Haitao; Wu, Sen; Yao, Jianquan



Towards comprehensive structural motif mining for better fold annotation in the "twilight zone" of sequence dissimilarity  

E-Print Network [OSTI]

: Definition 4 A graph G is approximate subgraph isomorphic to another graph G', denoted by G ?a G' if there exists a 1-1 injection f V[G] to V[G'], such that ?u?V M?(u),?'(f(u)) ? ?, ? u, v ? V, (u, v) ? E ? (f(u), f(v)) ? E', and ? (u, v) ? E, ?(u, v... below. Definition 5 A graph G is subgraph isomorphic to another graph G', denoted by G ? G' if there exists a 1-1 injection f from the node set V of a graph G to V' of a graph G', such that ? u ? V, ?(u) = ?'(f(u)) ? u, v ? V, (u, v) ? E ? (f(u), f(v...

Jia, Yi; Huan, Jun; Buhr, Vincent; Zhang, Jintao; Carayannopoulos, Leonidas N.



Viterbi Career Services From: Viterbi Careers [vcareers@usc.edu  

E-Print Network [OSTI]

This Week in the Wire Special Events Career Advising Register for connectSC Resume Submission Deadlines, and special events to help develop your engineering job search skills. Please click below to read what, please RSVP through this website: http://www.surveymonkey.com/s.aspx?sm=pP0YkMhw_2fOhd5SkrANn3vg_3d_3d

McLeod, Dennis


Inheritance of grain sorghum seedling characters and their linkage with specific chromosomes using trisomics  

E-Print Network [OSTI]

INHERITANCE OF GRAIN SORGHUH SEEDLING CHARACTERS AND THEIR LINKAGE 'WITH SPECIFIC CHROHOSOI'IES USIiVG TRISOHICS A Thesis Wayne William Hanna Approved as to style and content by: (Chairman of Committee) (Head of Department) (N b er) (Member.... IV EXPERItiENTAL RESULTS. 12 Seedling Genetic Stocks. Segregation ratios 12 12 Descriptions. 12 Trisomic X Genetic Stock Crosses. 23 Linkage of genes controlling chlorophyll deficient characters 23 Linkage of genes controlling coleoptile...

Hanna, Wayne William




E-Print Network [OSTI]

, · linklessly/knotlessly embeddable graphs · C, D minor ideals C D, C D minor ideals · C minor ideal Capex minor ideal Capex := {G | v V(G) such that G \\ v C} ISOLDE ADLER COMPUTING EXCLUDED MINORS 5/18 #12 graphs · C, D minor ideals C D, C D minor ideals · C minor ideal Capex minor ideal Capex := {G | v

Adler, Isolde


Geographical Variation in Selection, from Phenotypes to Molecules  

E-Print Network [OSTI]

vol. 167, no. 4 the american naturalist april 2006 #1; Geographical Variation in Selection, from Phenotypes to Molecules John K. Kelly* Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, Kansas 66045 Submitted June 6...- nomic regions that harbor important loci, those respon- 488 The American Naturalist Figure 4: Fraction of ZnS values that reject neutrality as a function of for different parameter combinations of the two-deme model withV /VG n asymmetric migration...

Kelly, John K.



Design of an efficient terahertz source using triply resonant nonlinear photonic  

E-Print Network [OSTI]

. Vodopyanov, M.M. Fejer, X. Yu, J.S. Harris, Y.S. Lee, W.C. Hurlbut, V.G. Kozlov, D. Bliss, C. Lynch, M.E. Fermann, K.L. Vodopyanov, M.M. Fejer, X. Yu, J.S. Harris, D. Bliss, C. Lynch, "High). 11. Y.S. Lee, T. Meade, V. Perlin, H. Winful, T.B. Norris, A. Galvanauskas, "Generation of narrow

Loncar, Marko


Mass Market Demand Response and Variable Generation Integration Issues: A Scoping Study  

SciTech Connect (OSTI)

This scoping study focuses on the policy issues inherent in the claims made by some Smart Grid proponents that the demand response potential of mass market customers which is enabled by widespread implementation of Advanced Metering Infrastructure (AMI) through the Smart Grid could be the silver bullet for mitigating variable generation integration issues. In terms of approach, we will: identify key issues associated with integrating large amounts of variable generation into the bulk power system; identify demand response opportunities made more readily available to mass market customers through widespread deployment of AMI systems and how they can affect the bulk power system; assess the extent to which these mass market Demand Response (DR) opportunities can mitigate Variable Generation (VG) integration issues in the near-term and what electricity market structures and regulatory practices could be changed to further expand the ability for DR to mitigate VG integration issues over the long term; and provide a qualitative comparison of DR and other approaches to mitigate VG integration issues.

Cappers, Peter; Mills, Andrew; Goldman, Charles; Wiser, Ryan; Eto, Joseph H.


Note: This page contains sample records for the topic "vg vg vg" 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.


Nuclear Magnetic Resonance Studies of Resorcinol-Formaldehyde Aerogels  

SciTech Connect (OSTI)

In this article we report a detailed study of resorcinol-formaldehyde (RF) aerogels prepared under different processing conditions, [resorcinol]/[catalyst] (R/C) ratios in the starting sol-gel solutions, using continuous flow hyperpolarized 129Xe NMR in combination with solid-state 13C and two-dimensional wide-line separation (2D-WISE) NMR techniques. The degree of polymerization and the mobility of the cross-linking functional groups in RF aerogels are examined and correlated with the R/C ratios. The origin of different adsorption regions is evaluated using both co-adsorption of chloroform and 2D EXSY 129Xe NMR. A hierarchical set of Xe exchange processes in RF aerogels is found using 2D EXSY 129Xe NMR. The exchange of Xe gas follows the sequence (from fastest to slowest): mesopores with free gas, gas in meso- and micro-pores, free gas with micropores, and, finally, among micropore sites. The volume-to-surface-area (Vg/S) ratios for aerogels are measured for the first time without the use of geometric models. The Vg/S parameter, which is related both to the geometry and the interconnectivity of the pore space, has been found to correlate strongly with the R/C ratio and exhibits an unusually large span: an increase in the R/C ratio from 50 to 500 results in about a 5-fold rise in Vg/S.

Moudrakovski, Igor L.; Ratcliffe, C I.; Ripmeester, J A.; Wang, Li Q.; Exarhos, Gregory J.; Baumann, T; Satcher, J H.



Notes 05. Dynamics of a simple rotor-fluid film bearing system  

E-Print Network [OSTI]

geometry RPM_max 10000:= MAXIMUM & design speeds Nmax 50:= # of cases for analysis RPM design 7200:= a 0.2 c?:= Amplitude of imbalance on rotor disk Mechanical energy convected by lubricant. ? 0.8:= Thermal model conditions Heat carry over - thermal mixing... coefficient. ? 0.70:= T supply 50K:= Supply Oil Temperature Take deg-K as deg-C Lubricant properties PROPERTIES OF LUBRICANT MOBIL velocite No 10 (ISO VG 22) ? supply 0.0143 Ns? m 2 ?:= Lubricant viscosity at Tsupply in Pa-sec. ? 0.028 1 K ?:= Alpha...

San Andres, Luis



Cost Estimation and Production Evaluation for Hopper Dredges  

E-Print Network [OSTI]

1848g3040g2879g3014 (7) where fg2933 is the Moody friction factor for water flow, g is gravitational acceleration in m/sec2 (ft/sec2), D is the inner diameter of the pipe in meters (ft), Vg2923 is the mean velocity of the mixture (m/s), Sg2929... COST ESTIMATION AND PRODUCTION EVALUATION FOR HOPPER DREDGES A Thesis by THOMAS ELLIOT HOLLINBERGER Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree...

Hollinberger, Thomas E.



New tube bundle heat transfer correlations and flow regime maps for a Once Through Steam Generator  

E-Print Network [OSTI]

/water, such as for estimating hydraulic loads on relief valve discharge lines. CHAPTER III ONCE THROUGH STEAM GENERATOR III. 1 B&W Once Through Steam Generator Description The B&W Once Through Steam Generator (OTSG), illustrated in Figure 1, is a vertical, straight ? tube... a liquid droplet developed by Taitel and Duklerr. 7 [~9(Pf ? Pg)] ' os ? w = MAX 0. 75, 1. 4 Vg pgg (18) It also places a. limit on the range of the slug ? to ? annular transition. 0. 75 & og ~ & 0. 96 (19) Two points need to be made. First...

Blanchat, Thomas Kevin



A procedure for calculating activity time compression in network scheduling systems  

E-Print Network [OSTI]

38 4. 0 4. 1 41 42 43 44 45 53 VI. SUM"IAR Y ~ 4 ~ s ~ o ~ ~ ~ ~ ~ ~ ~ 6o APPENDIX ~ ~ e e ~ ~ + ~ e ~ ~ ~ a ~ ~ ~ ~ ~ REFERENCES ~ ~ ~ ~ ~ o ~ ~ ~ ~ o ~ a ~ ~ ~ ~ 62 76 LIST OF TABLES TABLE II. III. Required Dimensions... the form - 8 wm+l bach wi is the current value of w. , i. e. , wi N vi. Therefore - 8 N vm+l N vl vl N v2 vg M 1/N Since N can be made arbitrarily large, 1/M essentially becomes zero. This means s& has the form 23 - 8 vm+1 sk ~ N 0 Dantzig...

Rae, Paul Stewart



Locus of control in hearing impaired children  

E-Print Network [OSTI]

HARD TEACHER LIKES STORY 45 DOES HI S BEST FATHER HAD EASY DAY 46 3 OOi. 4d 5 ooL~0 NO ONE HELPED NEVER D! D SCHOOLWORK 47 WF i~ imp Shat, sAD e&oi. p pgc Pggi, EVERYONE GOT BAD GRADES DOES NOT LISTEN 48 4 b FATHER HELPS WORKS HARD... j or Su'" j act: 2 s Ycho log Y LOCUS QI' COHTROL HEARIiVG IiMPsnIRED CHILDREVi Tl e sos by DEWEY GEORGE QVERHQLSER 'pproved as to style and conter. t by: C -' p + of Committee I"Iemo iviemb en | g) Head of Department December 198...

Overholser, Dewey George



Quantum Quasi-Cyclic LDPC Codes  

E-Print Network [OSTI]

In this paper, a construction of a pair of "regular" quasi-cyclic LDPC codes as ingredient codes for a quantum error-correcting code is proposed. That is, we find quantum regular LDPC codes with various weight distributions. Furthermore our proposed codes have lots of variations for length, code rate. These codes are obtained by a descrete mathematical characterization for model matrices of quasi-cyclic LDPC codes. Our proposed codes achieve a bounded distance decoding (BDD) bound, or known as VG bound, and achieve a lower bound of the code length.

Manabu Hagiwara; Hideki Imai



Rigidity theory for matroids  

E-Print Network [OSTI]

the (squared) edge lengths Q(pu pv), for fu;vg2E, where Q(x) = Pdi=1x2i ? (II.) What is the dimension of the space of in nitesimal motions p that preserve all the edge directions pu pv regarded as slopes, that is, up to scaling? The answers... to these questions are known to be determined by certain linear dependence matroids repre- sented over transcendental extensions of R, as we now explain. First, the d-dimensional rigidity matroid Rd(G) is the matroid represented by the vectors (2) f(eu ev) (pu pv...

Develin, Mike; Martin, Jeremy L.; Reiner, Victor



Cosmic constraint on unified model of dark sectors in flat and non-flat varying gravitational constant theory  

E-Print Network [OSTI]

Observations indicate that most universal matter are invisible and gravitational constant $G(t)$ maybe depends on the time. The theory of variation of $G$ (VG) is explored in this paper, with naturally resulting to the invisible components in universe. We utilize the observational data: lookback time data, model-independent gamma ray bursts data, growth function of matter linear perturbations, type Ia supernovae data with systematic errors, cosmic microwave background, and baryon acoustic oscillation data from the radial scale measurement and the peak-positions measurement, to restrict the unified model (UM) of dark components in VG theory. Using the best-fit values of parameters with the covariance matrix, constraints on the variation of $G$ are $(\\frac{G}{G_{0}})_{z=3.5}\\simeq 1.0003^{+0.0014}_{-0.0016}$ and $(\\frac{\\dot{G}}{G})_{today}\\simeq 0.7977^{+2.3566}_{-2.3566}\\times 10^{-13} yr^{-1}$ in a flat geometry, the small uncertainties around constants. Limit on equation of state of dark matter is $w_{0dm}=...

Lu, Jianbo; Wu, Yabo; Xu, Lixin



Application of population genetics theory to a gametic sampling scheme  

E-Print Network [OSTI]

/r) decreases, so that for large r: VB =' 4V(S1-BC) . 17 Therefore, Vr V G 4{V(Si) V(BC)-ZCo (Sl, BC)) k S 1 BC 2 S 1 BC 42[(X. -X. ) -(X. . -X. . ) k] (k-11 and (16) 2VG estimate of additive component. (3) Dominance component: Again referring...I', PPL CJ'. i ION OF POPULA, ' IOi' GENETICS THEORY ; O A G. -' l'. = T I C S, "i; I iP L I li G S C H E I I E A Thesis by i;, '-, I'. Y U il R I C H II A L L Submi tted to th. . Graduate Co11ege of Texas AS;I Uni ve& si ty in parti a1 fu1fi...

Ball, Mary Virginia Uhrich



Perfusion measurement with Rubidium 81 to Krypton 81m ratio  

E-Print Network [OSTI]

OF'IIN=1 WRI II:(II?FV?6) 6 FORMAT( 'Of'RIN f'? ( r A r 8) I ' ?4r*J. ) REAlt & IDEV r 22) I AN' IPRIN I. =O IF( (IANS. AND. '377) . EQ, '102 & IF'RINT--1 IF ( & IANS . ANIt, ' 377 &, EO. ' 1 0 I ):. 'f1 IN I;-0 WRITE (1DEV ~ 7) 7 FORMAT&' TTY... & IDEV r 48) GQ TQ 43 WRITE & IDEV r 47) FORM4T& 'OINPLIT 6 BKGD CHANNELS TO AVERAGE I ' r f r Ai) READ ( I DE V r 114 i I B*VG IF& IBAVG. LE. O) GO TO 9999 WRITE & IDEV r 52) FORMAT(' DISPLAY ((0=NO)ri=KRr2=PB!3=RB/KR)l 're A1) READ&IDEV!114...

Beasley, Charles Ward



Asteroseismic analysis of the CoRoT target HD 169392  

E-Print Network [OSTI]

The satellite CoRoT (Convection, Rotation, and planetary Transits) has provided high-quality data for almost six years. We show here the asteroseismic analysis and modeling of HD169392A, which belongs to a binary system weakly gravitationally bound as the distance between the two components is of 4250 AU. The main component, HD169392A, is a G0IV star with a magnitude of 7.50 while the second component is a G0V-G2IV star with a magnitude of 8.98. This analysis focuses on the main component, as the secondary one is too faint to measure any seismic parameters. A complete modeling has been possible thanks to the complementary spectroscopic observations from HARPS, providing Teff=5985+/-60K, log g=3.96+/-0.07, and [Fe/H]=- 0.04+/-0.10.

Mathur, S; Catala, C; Benomar, O; Davies, G R; Garcia, R A; Salabert, D; Ballot, J; Mosser, B; Regulo, C; Chaplin, W J; Elsworth, Y; Handberg, R; Hekker, S; Mantegazza, L; Michel, E; Poretti, E; Rainer, M; Roxburgh, I W; Samadi, R; Steslicki, M; Uytterhoeven, K; Verner, G A; Auvergne, M; Baglin, A; Forteza, S Barcelo; Baudin, F; Cortes, T Roca



General Hydrodynamics of He-3-a in Finite Magnetic-Fields  

E-Print Network [OSTI]

by setting to zero the full variational derivatives with respect to Q, I, $i, and, f. Using Sv,' 8(B,y) Sv A PE Sl; p(I x V,I)?I I which follow from (11), we find the (@,l) equilibri- um conditions to be O=V z' 0 = I x 4, 'Ir, =?Q, ?8,$??[I x ( h...?"'f +a?pmp) (I x '(7); (/I H,)? (24) a]() j(, v ' v = y l ' V )( v +maBapIIp X' P(V" O)-i = P'(i x q )?(a,8'l?+-n,8?'l )8 vg, 4~ ?yPf, (h ?H ) ?V" v'a- y"l '7 x?v" +m D pIIp, (27) ZP ?yP[ f & {h?A)] ?P{v" 9)f = n?p(-f &f[)p+mp(Bp V~ 7'-'D p Qf+E(jp 8...

SASLOW, WM; Hu, Chia-Ren.



Calculation of cross-section for neutron-proton bremsstrahlung at 14 MeV  

E-Print Network [OSTI]

~V~. 'lyly) i~gig~)]-kixjei)) (V-I) d & J (k r ) Xp, , ~ P -= ? ldcY, , j ~kr)V (r ~7) &&(4+4)J ] (p)) Y' (ex A ) -A. (V-2) xs any well-behaved vector field wnach vanished at x' infinity faster than ?) gp(g x (' iA'- d Qr- (f, ~) =- ? ?. ? ~S...~ ), , ? '-[r i (?)j~ " ~ VI(?i) (V-S) 0 m (g, lx ) =- +&? ' ? & ? f~( Y. '-g((~f) " g v'f(&o] J g's&(;, ) . ~v ~~" i"JZ~g, , "J, (Yr) V*(t'W) c yet-( J (V-d) (v-g) In n-2 (two-. , art&cia) system, the neutron ha no contri thor on the current densxty...

Uesu, Tadao



A study of changes in expressed attitudes in the realm of Negro-White relations of Texas A. & M. freshmen  

E-Print Network [OSTI]

'Irrcu~Ce Q t9 g o o e +v wo Nct 0 bled 5 o'0 Bio m a e & ~ R'0 Act 0 8'0 n gb oe v vm V vg e 3L' Experimental: Church A Church B Church C Church D Church E Total Experimental Total Control 49 27 7 -- 15 13 2 1 -- 10 34 6 8 1 1 - 6... not on the questionnaire given the respondents. LIBRARY A A m COLLEGE OF TEXAS HOW WOULD YOU REACT TV THE POLLOWINO: (1ndioate by entering an x 1n the proper space) I" M + P Pyj 51ii ~5 5mIN l, 2 ~ 3 ~ $ ~ 6. 7 ~ 8 ~ 9. 10, 12 ' 1$ 14. The attempt...

Ketch, Clarence Willard



Experimental and numerical investigation on air-side performance of fin-and-tube heat exchangers with various fin patterns  

SciTech Connect (OSTI)

Air-side heat transfer and friction characteristics of five kinds of fin-and-tube heat exchangers, with the number of tube rows (N = 12) and the diameter of tubes (D{sub o} = 18 mm), have been experimentally investigated. The test samples consist of five types of fin configurations: crimped spiral fin, plain fin, slit fin, fin with delta-wing longitudinal vortex generators (VGs) and mixed fin with front 6-row vortex-generator fin and rear 6-row slit fin. The heat transfer and friction factor correlations for different types of heat exchangers were obtained with the Reynolds numbers ranging from 4000 to 10000. It was found that crimped spiral fin provides higher heat transfer and pressure drop than the other four fins. The air-side performance of heat exchangers with the above five fins has been evaluated under three sets of criteria and it was shown that the heat exchanger with mixed fin (front vortex-generator fin and rear slit fin) has better performance than that with fin with delta-wing vortex generators, and the slit fin offers best heat transfer performance at high Reynolds numbers. Based on the correlations of numerical data, Genetic Algorithm optimization was carried out, and the optimization results indicated that the increase of VG attack angle or length, or decrease of VG height may enhance the performance of vortex-generator fin. The heat transfer performances for optimized vortex-generator fin and slit fin at hand have been compared with numerical method. (author)

Tang, L.H.; Zeng, M.; Wang, Q.W. [State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049 (China)



Advanced Nanomaterials for High-Efficiency Solar Cells  

SciTech Connect (OSTI)

Energy supply has arguably become one of the most important problems facing humankind. The exponential demand for energy is evidenced by dwindling fossil fuel supplies and record-high oil and gas prices due to global population growth and economic development. This energy shortage has significant implications to the future of our society, in addition to the greenhouse gas emission burden due to consumption of fossil fuels. Solar energy seems to be the most viable choice to meet our clean energy demand given its large scale and clean/renewable nature. However, existing methods to convert sun light into electricity are not efficient enough to become a practical alternative to fossil fuels. This DOE project aims to develop advanced hybrid nanomaterials consisting of semiconductor nanoparticles (quantum dots or QDs) supported on graphene for cost-effective solar cells with improved conversion efficiency for harvesting abundant, renewable, clean solar energy to relieve our global energy challenge. Expected outcomes of the project include new methods for low-cost manufacturing of hybrid nanostructures, systematic understanding of their properties that can be tailored for desired applications, and novel photovoltaic cells. Through this project, we have successfully synthesized a number of novel nanomaterials, including vertically-oriented graphene (VG) sheets, three-dimensional (3D) carbon nanostructures comprising few-layer graphene (FLG) sheets inherently connected with CNTs through sp{sup 2} carbons, crumpled graphene (CG)-nanocrystal hybrids, CdSe nanoparticles (NPs), CdS NPs, nanohybrids of metal nitride decorated on nitrogen-doped graphene (NG), QD-carbon nanotube (CNT) and QD-VG-CNT structures, TiO{sub 2}-CdS NPs, and reduced graphene oxide (RGO)-SnO{sub 2} NPs. We further assembled CdSe NPs onto graphene sheets and investigated physical and electronic interactions between CdSe NPs and the graphene. Finally we have demonstrated various applications of these nanomaterials in solar cells (both as photoanodes and counter electrodes), gas sensors, and energy storage devices. This research is potentially transformative since the availability of affordable hybrid nanostructures and their fundamental properties will enable various innovative applications of the multifunctional hybrid nanostructures and thus will accelerate new discoveries and inventions in nanoscience and nanotechnology.

Chen, Junhong [University of Wisconsin-Milwaukee] [University of Wisconsin-Milwaukee



Studies of the combustion of coal/refuse derived fuels using thermogravimetric-Fourier transform infrared-mass spectrometry  

SciTech Connect (OSTI)

The materials used in this project included two bituminous coals, a medium molecular weight PVC resin, cellulose, and shredded newspaper. Analytical data for the samples are given. A TA Instruments Model 951 Thermogravimetric Analyzer (TG) interfaced to a Perkin Elmer 1650 Fourier Transform Infrared Spectrometer (FTIR) was used in this study. The horizontal quartz furnace of the TG was connected to the 10 cm gas cell of the FTIR using an insulated teflon tube heated to a temperature of 150{degrees}C. The TG was also interfaced to a VG Thermolab Mass Spectrometer (MS) using a fused silica capillary sampling tube heated to approximately 170{degrees}C. A teflon splitter divides the gases from the TG into two parts, one to the FTIR ({approximately}95%), and the other to the MS ({approximately}5%). A schematic of the TG-FTIR-MS system, is presented. In the TG experiments, all samples ({approximately}300 mg each) were heated in air (50 ML/min) at a rate of 10{degrees}C/min to 700{degrees}C. The spectra and profiles of gaseous species evolving from the TG system were recorded and analyzed by the TGA-FTIR-MS analytical system. The results of the experiments are given.

Lu, H.; Li, J.; Lloyd, W.G. [and others



Folklore in Huckleberry Finn  

E-Print Network [OSTI]

:;~@~. ~. ~. . . ', , ' . :;. ? !'--:::: ' ':, . :. -: 8eii&i?'-. 6@. -14, Mi bij:"i4&i&j'a j4 . 'et- +e::~4. eie~iei, "I, Y L* X'8'g +& "tR1+Gl RX8 ~BC i ~i X~3A~g ' QE4Yi@8 QZ Ci'k& 92. p VG' g'@~~SIX 3 I f l1 Xt . m~~ a ev~Xvue e~Q, 8hee~d Shet 14. . 053. p~ g~~~ 4L~~~Figh% "4$t? . , q...X@erh Siped', e@, P@gee& gS~ ~el'. , We eeMexXeW 'M@ggephgy P, Ve'L8. ' (New gat~k, 1@3, 222'~ p-8. , 2 Mp 8;. &m%~ ~. , ~flee Rele ag Fe3. &exe ~ VI sl 8; . ggg, . ~ASK'fag ~XXleXO ?Wdl RS (BOlk8 hQt 3. $ &. ~ . ."- gwe~Ci gets~&m +e, S@~ ke...

Skaggs, Peggy Dechert



Probing the Geometry and Interconnectivity of Pores in Organic Aerogels Using Hyperpolarized 129Xe NMR Spectroscopy  

SciTech Connect (OSTI)

Aerogels represent a class of novel open-pore materials with high surface area and nanometer pore sizes. They exhibit extremely low mass densities, low thermal conductivity, good acoustic insulation, and low dielectric constants. These materials have potential applications in catalysis, advanced separation techniques, energy storage, environmental remediation, and as insulating materials. Organic aerogels are stiffer and stronger than silica aerogels and are better insulators with higher thermal resistance. Resorcinol-Formaldehyde (RF) aerogels are typically prepared through the base-catalyzed sol-gel polymerization of resorcinol with formaldehyde in aqueous solution to produce gels, which are then dried in supercritical CO2.1,2 The [resorcinol]/ [catalyst] (R/C) ratio of the starting sol-gel solution has been determined to be the dominant factor that affects the properties of RF aerogels. Since the unique microstructures of aerogels are responsible for their unusual properties, characterizing the detailed porous structures and correlating them with the processing parameters are vital to establish rational design principles for novel organic aerogels with tailored properties. In this communication we report the first use of hyperpolarized (HP) 129Xe NMR to probe the geometry and interconnectivity of pores in RF aerogels and to correlate these with synthetic conditions. Our work demonstrates that HP 129Xe NMR is so far the only method for accurately measuring the free volume-to-surface-area (Vg/S) ratios for soft mesoporous materials without using any geometric models.

Moudrakovski, Igor L.; Wang, Li Q.; Baumann, T.; Satcher, J. H.; Exarhos, Gregory J.; Ratcliffe, C. I.; Ripmeester, J. A.


Note: This page contains sample records for the topic "vg vg vg" 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.


Varying constants quantum cosmology  

E-Print Network [OSTI]

We discuss minisuperspace models within the framework of varying physical constants theories including $\\Lambda$-term. In particular, we consider the varying speed of light (VSL) theory and varying gravitational constant theory (VG) using the specific ans\\"atze for the variability of constants: $c(a) = c_0 a^n$ and $G(a)=G_0 a^q$. We find that most of the varying $c$ and $G$ minisuperspace potentials are of the tunneling type which allows to use WKB approximation of quantum mechanics. Using this method we show that the probability of tunneling of the universe "from nothing" ($a=0)$ to a Friedmann geometry with the scale factor $a_t$ is large for growing $c$ models and is strongly suppressed for diminishing $c$ models. As for $G$ varying, the probability of tunneling is large for $G$ diminishing, while it is small for $G$ increasing. In general, both varying $c$ and $G$ change the probability of tunneling in comparison to the standard matter content (cosmological term, dust, radiation) universe models.

Katarzyna Leszczynska; Adam Balcerzak; Mariusz P. Dabrowski




SciTech Connect (OSTI)

The Cold War era created a massive build-up of nuclear weapon stockpiles in the former Soviet Union and the United States. The primary objective during this period was the development of nuclear technologies for weapons, space and power with lack of attention to the impact of radioactive and hazardous waste products on the environment. Effective technologies for radioactive and hazardous waste treatment and disposal were not well investigated or promoted during the arms build-up; and consequently, environmental contamination has become a major problem. These problems in Russia and the United States are well documented. Significant amounts of liquid radwaste have existed since the 1950's. The current government of the Russian Federation is addressing the issues of land remediation and permanent storage of radwaste resulting from internal and external pressures for safe cleanup and storage. The Russian government seeks new technologies from internal sources and from the West that will provide high performance, long term stability, safe for transport and for long-term storage of liquid radwaste at a reasonable economic cost. With the great diversity of liquid chemical compositions and activity levels, it is important to note that these waste products cannot be processed with commonly used methods. Different techniques and materials can be used for this problem resolution including the use of polymer materials that are capable of forming chemically stable, solidified waste products. In 2001, the V.G. Khlopin Radium Institute (St. Petersburg, Russia) and Pacific World Trade (Indianapolis, Indiana) began an extensive research and test program to determine the effectiveness and performance of high technology polymers for the immobilization and solidification of complex liquid radwaste types generated by the Ministry of Atomic Energy (Minatom), Russia, organization. The high tech polymers used in the tests were provided by Nochar, Inc. (Indianapolis, Indiana).

Kelley, Dennis; Brunkow, Ward; Pokhitonov, Yuri; Starchenko, Vadim



Investigations of substitutional impurity segregation to the {Sigma}5(310)/[001] STGB in FCC metals: a EFTEM and HRTEM study  

SciTech Connect (OSTI)

Investigations of the {Sigma}5 symmetric tilt grain boundaries (STGB) in face-centered cubic (FCC) metals in four different metal systems were performed. The metals we have chosen include pure Aluminum, pure Copper, Copper with 1at% Silver, and Aluminum with 1at% Copper. The model grain boundaries have been fabricated with ultra-high vacuum diffusion bonding of single crystals. With the controlled fabrication and preparation of bicrystals we are able to determine composition, structure and morphology of grain boundaries which depends on geometry, crystal orientation, impurity concentration and temperature. The limiting factor in this approach is the ability to fabricate well defined, precisely oriented interfaces, which is enabled here with the UHV Diffusion Bonding Machine [1]. The relation between grain boundary energy and impurity segregation to the interface have been theoretically calculated for the {Sigma}5 (310)/[001] interfaces within the Local Density Approximation (LDA). The calculations use a plane-wave basis and ultrasoft pseudopotentials [2]. The overall structure, especially for the Al interface is qualitatively similar to previous predictions based on pair-potential calculations. These theoretical calculations of the interface structure indicates that the Cu and the Ag atoms segregate to distinct atomic sites at the interface. High resolution electron microscopy (HRTEM) have been used to reveal the structure of the different interfaces under investigation and to proof the predictions of the theoretical model. Simulations of the HRTEM images were done using these calculated structural models. Additionally structural models based on geometric considerations (coincidence site lattice construction) were used and compared to the experimentally obtained HRTEM images. High resolution images of the boundary structure were acquired using different consecutive defocus values. To acquire these through-focal series we have automated the acquisition process using the script language of the Gatari Digital Micrograph software. The main aim of recording the through-focal series is the possibility of exit wave reconstruction of the investigated boundary structure [3]. Shown in Figure 1a is one of the 30 images of the through-focal series which was obtained with a Philips CM300 FEG UT TEM at the National Center for Electron Microscopy. The homogeneously flat surface of the sample over the field of view and the lack of distortions which are normally present in HRTEM images is a direct result of the sample preparation with a low energy, low angle ion mill [4]. Investigations are planned to compare the reconstructed images (Fig.1b) to ''Z''-contrast images. For these particular investigations we will use the VG HI3 603 U in the Solid State Division at the Oak Ridge National Laboratory. To confirm the presence and determine the amount of the segregant, analytical electron microscopy was performed using a Philips CM 300 FEG ST TEM equipped with an Gatan Imaging Filter (GIF) with a 2kx2k CCD camera and an EDX detector. Electron spectroscopic images were acquired at the L{sub 2,3}-edge of copper around 931 eV to extract elemental maps (three-window-technique) of the copper distribution (Fig. 2a). Because of the small amount of the segregated species and the high energy loss of the investigated ionization edge the resulting elemental distributions are heavily dominated by noise. Series of ESI images were used to enhance the signal and to provide a better background subtraction. To reveal more precisely the segregation to the grain boundary, EDS line scans were performed and the resulting spectra were quantified (Fig. 2b). The amount of the copper in the analyzed volume of the Al-1at%Cu bicrystal is nearly doubled ({approx} 2 at%) in relation to the bulk concentration of {approx} 1 at% (average from different line scans). The quantification results were refined and confirmed by the use of EELS line scans.

Plitzko, J M; Campbell, G H; King, W E; Foiles, S M




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The objective of this task was to develop glass formulations for (Department of Energy) DOE waste streams with high aluminum concentrations to avoid nepheline formation while maintaining or meeting waste loading and/or waste throughput expectations as well as satisfying critical process and product performance related constraints. Liquidus temperatures and crystallization behavior were carefully characterized to support model development for higher waste loading glasses. The experimental work, characterization, and data interpretation necessary to meet these objectives were performed among three partnering laboratories: the V.G. Khlopin Radium Institute (KRI), Pacific Northwest National Laboratory (PNNL) and Savannah River National Laboratory (SRNL). Projected glass compositional regions that bound anticipated Defense Waste Processing Facility (DWPF) and Hanford high level waste (HLW) glass regions of interest were developed and used to generate glass compositions of interest for meeting the objectives of this study. A thorough statistical analysis was employed to allow for a wide range of waste glass compositions to be examined while minimizing the number of glasses that had to be fabricated and characterized in the laboratory. The glass compositions were divided into two sets, with 45 in the test matrix investigated by the U.S. laboratories and 30 in the test matrix investigated by KRI. Fabrication and characterization of the US and KRI-series glasses were generally handled separately. This report focuses mainly on the US-series glasses. Glasses were fabricated and characterized by SRNL and PNNL. Crystalline phases were identified by X-ray diffraction (XRD) in the quenched and canister centerline cooled (CCC) glasses and were generally iron oxides and spinels, which are not expected to impact durability of the glass. Nepheline was detected in five of the glasses after the CCC heat treatment. Chemical composition measurements for each of the glasses were conducted following an analytical plan. A review of the individual oxides for each glass revealed that there were no errors in batching significant enough to impact the outcome of the study. A comparison of the measured compositions of the replicates indicated an acceptable degree of repeatability as the percent differences for most of the oxides were less than 5% and percent differences for all of the oxides were less than 10 wt%. Chemical durability was measured using the Product Consistency Test (PCT). All but two of the study glasses had normalized leachate for boron (NL [B]) values that were well below that of the Environmental Assessment (EA) reference glass. The two highest NL [B] values were for the CCC versions of glasses US-18 and US-27 (10.498 g/L and 15.962 g/L, respectively). Nepheline crystallization was identified by qualitative XRD in five of the US-series glasses. Each of these five glasses (US-18, US-26, US-27, US-37 and US-43) showed a significant increase in NL [B] values after the CCC heat treatment. This reduction in durability can be attributed to the formation of nepheline during the slow cooling cycle and the removal of glass formers from the residual glass network. The liquidus temperature (T{sub L}) of each glass in the study was determined by both optical microscopy and XRD methods. The correlation coefficient of the measured XRD TL data versus the measured optical TL data was very good (R{sup 2} = 0.9469). Aside from a few outliers, the two datasets aligned very well across the entire temperature range (829 C to 1312 C for optical data and 813 C to 1310 C for XRD crystal fraction data). The data also correlated well with the predictions of a PNNL T{sub L} model. The correlation between the measured and calculated data had a higher degree of merit for the XRD crystal fraction data than for the optical data (higher R{sup 2} value of 0.9089 versus 0.8970 for the optical data). The SEM-EDS analysis of select samples revealed the presence of undissolved RuO{sub 2} in all glasses due to the low solubility of RuO{sub 2} in borosilicate glass. These

Fox, K; David Peeler, D; Tommy Edwards, T; David Best, D; Irene Reamer, I; Phyllis Workman, P; James Marra, J