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Note: This page contains sample records for the topic "vertical scales differ" 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

Scaling hard vertical surfaces with compliant microspine arrays  

E-Print Network [OSTI]

has been developed that allows a robot to scale concrete, stucco, brick and masonry walls without vertical surfaces such as windows and interior walls. None of these approaches is suitable for porous and typically dusty exterior surfaces such as brick, concrete, stucco or stone. Other robots employ hand

Provancher, William

2

IntroductionIntroduction The use of small scale vertical axis wind turbinesThe use of small scale vertical axis wind turbines  

E-Print Network [OSTI]

IntroductionIntroduction The use of small scale vertical axis wind turbinesThe use of small scale vertical axis wind turbines (VAWT) is being studied at McMaster University using(VAWT) is being studied at McMaster University using a prototype wind turbine provided bya prototype wind turbine provided

Tullis, Stephen

3

Estimating the fracture density of small-scale vertical fractures when large-scale vertical fractures are present  

E-Print Network [OSTI]

When fractures are vertical, aligned and their dimensions are small relative to the seismic wavelength, the medium can be considered to be an equivalent Horizontal Transverse Isotropic (HTI) medium. However, geophysical ...

Liu, Yuwei

2013-01-01T23:59:59.000Z

4

Cloud-Scale Vertical Velocity and Turbulent Dissipation Rate Retrievals  

SciTech Connect (OSTI)

Time-height fields of retrieved in-cloud vertical wind velocity and turbulent dissipation rate, both retrieved primarily from vertically-pointing, Ka-band cloud radar measurements. Files are available for manually-selected, stratiform, mixed-phase cloud cases observed at the North Slope of Alaska (NSA) site during periods covering the Mixed-Phase Arctic Cloud Experiment (MPACE, late September through early November 2004) and the Indirect and Semi-Direct Aerosol Campaign (ISDAC, April-early May 2008). These time periods will be expanded in a future submission.

Shupe, Matthew

2013-05-22T23:59:59.000Z

5

Cloud-Scale Vertical Velocity and Turbulent Dissipation Rate Retrievals  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Time-height fields of retrieved in-cloud vertical wind velocity and turbulent dissipation rate, both retrieved primarily from vertically-pointing, Ka-band cloud radar measurements. Files are available for manually-selected, stratiform, mixed-phase cloud cases observed at the North Slope of Alaska (NSA) site during periods covering the Mixed-Phase Arctic Cloud Experiment (MPACE, late September through early November 2004) and the Indirect and Semi-Direct Aerosol Campaign (ISDAC, April-early May 2008). These time periods will be expanded in a future submission.

Shupe, Matthew

6

Classifying forest productivity at different scales  

SciTech Connect (OSTI)

Spatial scale is an important consideration when evaluating, using, or constructing forest productivity classifications. First, the factors which dominate spatial variability in forest productivity are scale dependent. For example, within a stand, spatial variability in productivity is dominated by microsite differences; within a national forest such as the Cherokee National Forest, spatial variability is dominated by topography and land-use history (e.g., years since harvest); within a large region such as the southeast, spatial variability is dominated by climatic patterns. Second, classifications developed at different spatial scales are often used for different purposes. For example, stand-level classifications are often keys or rules used in the field to judge the quality or potential of a site. National-forest classifications are often presented as maps or tables and may be used in forest land planning. Regional classifications may be maps or tables and may be used to quantify or predict resource availability. These scale-related differences in controlling factors and purposes will affect both the methods and the data used to develop classifications. In this paper, I will illustrate these points by describing and comparing three forest productivity classifications, each developed for a specific purpose at a specific scale. My objective is not to argue for or against any of these particular classifications but rather to heighten awareness of the critical role that spatial scale plays in the use and development of forest productivity classifications. 8 refs., 2 figs., 1 tab.

Graham, R.L.

1991-01-01T23:59:59.000Z

7

The calculation of proppant transport in vertical hydraulic fractures using finite difference techniques  

E-Print Network [OSTI]

'itions, Babcock ct al . showed proppant concentration to be a ronti- 4 nuous function cf vertical posi tion, The ri. lationship is presented in Figure 3. This concentration profile is applicable to all fracture de- signs . Figure 4 illustrates the concentration... l artla1 fulfH1nient of ! he reOu!no sent Inn tn- d gnee of THE CALCULATION OF PROPPANT TRANSPORT IN VERTICAL HYDRAULIC FRACTLIRES USING FiliITE DIFFERENCE TECHfiIljUES A Thesis ROBERT WINSTON RASOR Approved as to styie and content by...

Rasor, Robert Winston

1978-01-01T23:59:59.000Z

8

Constructal multi-scale package of vertical channels with natural convection and maximal heat transfer density. CONSTRUCTAL DESIGN: THE GENERATION OF MULTI-SCALE HEAT  

E-Print Network [OSTI]

transfer density. CONSTRUCTAL DESIGN: THE GENERATION OF MULTI-SCALE HEAT AND FLUID FLOW STRUCTURES-scale structures in natural convection with the objective of maximizing the heat transfer density, or the heat transfer rate per unit of volume§ . The flow volume is filled with vertical equidistant heated blades

Kihm, IconKenneth David

9

Comparing maximal mean values on different scales  

E-Print Network [OSTI]

When computing the average speed of a car over different time periods from given GPS data, it is conventional wisdom that the maximal average speed over all time intervals of fixed length decreases if the interval length increases. However, this intuition is wrong. We investigate this phenomenon and make rigorous in which sense this intuition is still true.

Thomas Havenith; Sebastian Scholtes

2015-01-20T23:59:59.000Z

10

Macro scale physical model of nanoindentation on vertically aligned carbon nanotube forests  

E-Print Network [OSTI]

Currently the process of nanoindentation is being explored as a reliable means of determining the mechanical properties of carbon nanotubes (CNTs) and the constituent tubes of vertically aligned carbon nanotube (VACNT) ...

Ebeling, Geoffrey F. (Geoffrey Foster), 1981-

2004-01-01T23:59:59.000Z

11

Experimental study on vertical scaling of InAs-on-insulator metal-oxide-semiconductor field-effect transistors  

SciTech Connect (OSTI)

We have investigated effects of the vertical scaling on electrical properties in extremely thin-body InAs-on-insulator (-OI) metal-oxide-semiconductor field-effect transistors (MOSFETs). It is found that the body thickness (T{sub body}) scaling provides better short channel effect (SCE) control, whereas the T{sub body} scaling also causes the reduction of the mobility limited by channel thickness fluctuation (?T{sub body}) scattering (?{sub fluctuation}). Also, in order to achieve better SCEs control, the thickness of InAs channel layer (T{sub channel}) scaling is more favorable than the thickness of MOS interface buffer layer (T{sub buffer}) scaling from a viewpoint of a balance between SCEs control and ?{sub fluctuation} reduction. These results indicate necessity of quantum well channel structure in InAs-OI MOSFETs and these should be considered in future transistor design.

Kim, SangHyeon, E-mail: dadembyora@mosfet.t.u-tokyo.ac.jp, E-mail: sh-kim@kist.re.kr; Yokoyama, Masafumi; Nakane, Ryosho; Takenaka, Mitsuru; Takagi, Shinichi [Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan); Ichikawa, Osamu; Osada, Takenori; Hata, Masahiko [Sumitomo Chemical Co., Ltd., 6 Kitahara, Tsukuba, Ibaraki 300-3294 (Japan)

2014-06-30T23:59:59.000Z

12

DHS Internship Summary-Crystal Assembly at Different Length Scales  

SciTech Connect (OSTI)

I was part of a project in which in situ atomic force microscopy (AFM) was used to monitor growth and dissolution of atomic and colloidal crystals. At both length scales, the chemical environment of the system greatly altered crystal growth and dissolution. Calcium phosphate was used as a model system for atomic crystals. A dissolution-reprecipitation reaction was observed in this first system, involving the conversion of brushite (DCPD) to octacalcium phosphate (OCP). In the second system, polymeric colloidal crystals were dissolved in an ionic solvent, revealing the underlying structure of the crystal. The dissolved crystal was then regrown through an evaporative step method. Recently, we have also found that colloids can be reversibly deposited in situ onto an ITO (indium tin oxide) substrate via an electrochemistry setup. The overall goal of this project was to develop an understanding of the mechanisms that control crystallization and order, so that these might be controlled during material synthesis. Controlled assembly of materials over a range of length scales from molecules to nanoparticles to colloids is critical for designing new materials. In particular, developing materials for sensor applications with tailorable properties and long range order is important. In this work, we examine two of these length scales: small molecule crystallization of calcium phosphate (whose crystal phases include DCPD, OCP, and HAP) and colloidal crystallization of Poly(methyl methacrylate) beads. Atomic Force Microscopy is ideal for this line of work because it allows for the possibility of observing non-conducting samples in fluid during growth with high resolution ({approx} 10 nm). In fact, during atomic crystal growth one can observe changes in atomic steps, and with colloidal crystals, one can monitor the individual building blocks of the crystal. Colloids and atoms crystallize under the influence of different forces acting at different length scales as seen in Table 1. In particular, molecular crystals, which are typically dominated by ionic and covalent bonding, are an order of magnitude more strongly bonded than colloidal crystals. In molecular crystals, ordering is driven by the interaction potentials between molecules. By contrast, colloidal assembly is a competition between the repulsive electrostatic forces that prevent aggregation in solution (due to surface charge), and short-range van der Waals and entropic forces that leads to ordering. Understanding atomic crystallization is fundamentally important for fabrication of tailorable crystalline materials, for example for biological or chemical sensors. The transformation of brushite to OCP not only serves as a model system for atomic crystal growth (applicable to many other crystal growth processes), but is also important in bone cements. Colloidal crystals have unique optical properties which respond to chemical and mechanical stimuli, making them very important for sensing applications. The mechanism of colloidal crystal assembly is thus fundamentally important. Our in situ dissolution and regrowth experiments are one good method of analyzing how these crystals pack under different conditions and how defect sites are formed and filled. In these experiments, a silica additive was used to strengthen the colloidal crystal during initial assembly (ex situ) and to increase domain size and long range order. Reversible electrodeposition of colloids onto a conductive substrate (ITO in our case) is another system which can further our knowledge of colloidal assembly. This experiment holds promise of allowing in situ observation of colloidal crystal growth and the influence of certain additives on crystal order. The ultimate goal would be to achieve long range order in these crystals by changing the surface charge or the growth environment.

Mishchenko, L

2009-08-06T23:59:59.000Z

13

LINK BETWEEN COSMIC RAYS AND CLOUDS ON DIFFERENT TIME SCALES  

E-Print Network [OSTI]

, Finland Ilya.Usoskin@oulu.fi A possible mechanism of solar variability influence upon the Earth's climate of energy brought by CR into the terrestrial system is negli- gible compared to solar radiation. On daily scales, major For- bush decreases and solar energetic particle events can affect the cyclogenesis

Usoskin, Ilya G.

14

Forbidden vertices  

E-Print Network [OSTI]

Abstract. In this work, we introduce and study the forbidden-vertices problem. Given a polytope P and a subset X of its vertices, we study the complexity of linear ...

2014-03-01T23:59:59.000Z

15

COMPUTATIONAL SIMULATIONS FOR PREDICTING VERTICAL DAYLIGHT LEVELS IN ATRIUM BUILDINGS  

E-Print Network [OSTI]

This paper investigates the impact of well geometry and surface reflectance on vertical daylight levels in atria with square forms under a CIE standard overcast sky. By reviewing some previous investigations and comparing with scale model measurements the vertical daylight factor calculated using Radiance are validated. More simulated vertical daylight factors for a very wide range of atrium geometries and reflectances are given. From the results the attenuation and distribution of the vertical daylight levels on the wall of a square atrium with different reflectances are displayed. Also, the comparisons between simulations and two analytical theories have been performed. Finally some conclusions for supporting daylight design in atria are presented.

Jiangtao Du; Steve Sharples

16

Large-Scale Analysis of Individual and Task Differences in Search Result Page Examination Strategies  

E-Print Network [OSTI]

Large-Scale Analysis of Individual and Task Differences in Search Result Page Examination users examine results which are similar to those observed in small-scale studies. Our findings have differences on search result page examination strategies is important in develop- ing improved search engines

Dumais, Susan

17

Pore-scale difference between miscible and immiscible viscous fingering in porous media  

SciTech Connect (OSTI)

When one fluid displaces another in a porous medium, the displacement can be stable or unstable. Viscous fingering is an unstable phenomenon that occurs when a less viscous fluid displaces a more viscous one. During oil recovery viscous fingering results in a poor recovery due to the bypass of the resident oil by the displacing fluid. In an oil reservoir there is randomness of many different length scales, ranging from pore size to reservoir size. Viscous fingering can have many different length scales due to the randomness. It is important to understand how the randomness on different scales affects the development of fingering. In this note the authors report experiments on the displacement stability in two-dimensional network models of porous media. The purpose of this work is to better understand the pore-scale phenomena of displacement. Immiscible viscous fingering in a two-dimensional network model, with negligible effects of the interfacial tension, has been studied. Although qualitative agreement was found between simulations and experiments for the immiscible case, some fundamental difference was found for the miscible case. The cause of difference and other relevant experimental observations are discussed.

Chen, J.D.

1987-02-01T23:59:59.000Z

18

Vertical axis wind turbine acoustics  

E-Print Network [OSTI]

Vertical Axis Wind Turbine Acoustics Charlie Pearson Corpus Christi College Cambridge University Engineering Department A thesis submitted for the degree of Doctor of Philosophy September 2013 Declaration Described in this dissertation is work... quickly to changing wind conditions, small- scale vertical axis wind turbines (VAWTs) have been proposed as an efficient solution for deployment in built up areas, where the wind is more gusty in nature. If VAWTs are erected in built up areas...

Pearson, Charlie

2014-04-08T23:59:59.000Z

19

1.2 What pressure difference must be generated across the length of a 15 cm vertical drinking straw in order to drink a water-like liquid of density 1.0 g cm-3  

E-Print Network [OSTI]

in order to drink a water-like liquid of density 1.0 g cm-3 ? 1.6 Charles' law is sometimes expressed1.2 What pressure difference must be generated across the length of a 15 cm vertical drinking straw

Findley, Gary L.

20

Wind speed forecasting at different time scales: a non parametric approach  

E-Print Network [OSTI]

The prediction of wind speed is one of the most important aspects when dealing with renewable energy. In this paper we show a new nonparametric model, based on semi-Markov chains, to predict wind speed. Particularly we use an indexed semi-Markov model, that reproduces accurately the statistical behavior of wind speed, to forecast wind speed one step ahead for different time scales and for very long time horizon maintaining the goodness of prediction. In order to check the main features of the model we show, as indicator of goodness, the root mean square error between real data and predicted ones and we compare our forecasting results with those of a persistence model.

D'Amico, Guglielmo; Prattico, Flavio

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Continuous Growth of Vertically Aligned Carbon Nanotubes  

E-Print Network [OSTI]

Vertically aligned carbon nanotubes (VACNTs), sometimes called forests or carpets, are a promising material due to their unique physical and scale-dependent physical properties [1-3]. Continuous production of VACNTs is ...

Guzman de Villoria, R.

22

Submitted to WRR 1 Use of hydraulic tests at different scales to characterize fracture network properties in  

E-Print Network [OSTI]

Submitted to WRR 1 Use of hydraulic tests at different scales to characterize fracture network, hydraulic conductivity, fracture, anisotropy 1. INTRODUCTION Hard rocks and their associated aquifers occur properties in the weathered-fractured layer of a hard rock aquifer J.C. Maréchala,b* , B. Dewandela , K

Boyer, Edmond

23

Vertical axis wind turbines  

DOE Patents [OSTI]

A vertical axis wind turbine is described. The wind turbine can include a top ring, a middle ring and a lower ring, wherein a plurality of vertical airfoils are disposed between the rings. For example, three vertical airfoils can be attached between the upper ring and the middle ring. In addition, three more vertical airfoils can be attached between the lower ring and the middle ring. When wind contacts the vertically arranged airfoils the rings begin to spin. By connecting the rings to a center pole which spins an alternator, electricity can be generated from wind.

Krivcov, Vladimir (Miass, RU); Krivospitski, Vladimir (Miass, RU); Maksimov, Vasili (Miass, RU); Halstead, Richard (Rohnert Park, CA); Grahov, Jurij (Miass, RU)

2011-03-08T23:59:59.000Z

24

Vertical axis wind turbine  

SciTech Connect (OSTI)

Wind turbines are largely divided into vertical axis wind turbines and propeller (Horizontal axis) wind turbines. The present invention discloses a vertical axis high speed wind turbine provided with a starting and braking control system. This vertical axis wind turbine is formed by having blades of a proper airfoil fitted to respective supporting arms provided radially from a vertical rotary axis by keeping the blade span-wise direction in parallel with the axis and being provided with a low speed control windmill in which the radial position of each operating piece varies with a centrifugal force produced by the rotation of the vertical rotary axis.

Kato, Y.; Seki, K.; Shimizu, Y.

1981-01-27T23:59:59.000Z

25

CHARACTERIZATION OF MIXED WETTABILITY AT DIFFERENT SCALES AND ITS IMPACT ON OIL RECOVERY EFFICIENCY  

SciTech Connect (OSTI)

The objectives of the this research project were to: (1) Quantify the pore scale mechanisms that determine the wettability state of a reservoir; (2) Study the effect of crude oil, brine and mineral compositions in the establishment of mixed wet states; (3) Clarify the effect of mixed-wettability on oil displacement efficiency in waterfloods; and (4) Develop a new tracer technique to measure wettability, fluid distributions, residual saturations and relative permeabilities.

Mukul M. Sharma; George J. Hirasaki

2003-09-01T23:59:59.000Z

26

CHARACTERIZATION OF MIXED WETTABLILITY AT DIFFERENT SCALES AND ITS IMPACT ON OIL RECOVERY EFFICIENCY  

SciTech Connect (OSTI)

The objectives of the this research project were to: (1) Quantify the pore scale mechanisms that determine the wettability state of a reservoir; (2) Study the effect of crude oil, brine and mineral compositions in the establishment of mixed wet states; (3) Clarify the effect of mixed-wettability on oil displacement efficiency in waterfloods; and (4) Develop a new tracer technique to measure wettability, fluid distributions, residual saturations and relative permeabilities.

Mukul M. Sharma; George J. Hirasaki

2003-08-31T23:59:59.000Z

27

Scaling fluid content-pressure relations of different fluid systems in porous media  

SciTech Connect (OSTI)

Two-fluid-phase relations among fluid saturations (S) and pressures (P) have historically been used to predict S-P relations for three-fluid-phase systems consisting of a gas, nonaqueous phase liquid (NAPL), and water, because measurements of three-phase S-P relations are complex. Two-phase S-P relations of air-NAPL systems are generally used to predict the behavior between total-liquid saturations of three-phase systems and air-NAPL capillary pressures. Two-phase S-P relations of NAPL-water systems are generally used to predict the behavior between water saturations of three-phase systems and NAPL-water capillary pressures. Because S-P measurements are very time-consuming, investigators have attempted to scale S-P relations so that fewer measurements would be required. A S-P scaling technique is discussed in this paper, and methods to predict the scaling factors are evaluated.

Lenhard, R.J.

1994-04-01T23:59:59.000Z

28

Vertical axis wind turbine  

SciTech Connect (OSTI)

Wind turbines are largely divided into vertical axis wind turbines and propeller (Horizontal axis) wind turbines. The present invention discloses a vertical axis high speed wind turbine provided with rotational speed control systems. This vertical axis wind turbine is formed by having blades of a proper airfoil fitted to respective supporting arms provided radially from a vertical rotating shaft by keeping the blade span-wise direction in parallel with the shaft and being provided with aerodynamic control elements operating manually or automatically to control the rotational speed of the turbine.

Kato, Y.; Seki, K.; Shimizu, Y.

1981-01-27T23:59:59.000Z

29

Radiative transfer based scaling of LAI retrievals from reflectance data of different resolutions  

E-Print Network [OSTI]

is investigated with 1-km Advanced Very High Resolution Radiometer (AVHRR) data aggregated to different coarse into biogeophysical (energy and water exchanges) and biogeochemical (carbon and volatile organic compound exchanges. Vegetation leaf area index governs net radiation and its expenditure (energy balance), net primary production

Myneni, Ranga B.

30

Because ScanSAR images have a different scale and orientation  

E-Print Network [OSTI]

deforestation by synthetic aperture radar Martin Whittle(a), Shaun Quegan(a),Kokok Yulianto(b) and Yumiko Uryu. The difference is an estimate of interim deforestation. The FBD scene used here fully overlaps both databases. Eva, et al. (2002). "Determination of Deforestation Rates of the World's Humid Tropical Forests

31

Manipulating surface diffusion and elastic interactions to obtain quantum dot multilayer arrangements over different length scales  

SciTech Connect (OSTI)

An innovative multilayer growth of InAs quantum dots on GaAs(100) is demonstrated to lead to self-aggregation of correlated quantum dot chains over mesoscopic distances. The fundamental idea is that at critical growth conditions is possible to drive the dot nucleation only at precise locations corresponding to the local minima of the Indium chemical potential. Differently from the known dot multilayers, where nucleation of new dots on top of the buried ones is driven by the surface strain originating from the dots below, here the spatial correlations and nucleation of additional dots are mostly dictated by a self-engineering of the surface occurring during the growth, close to the critical conditions for dot formation under the fixed oblique direction of the incoming As flux, that drives the In surface diffusion.

Placidi, E., E-mail: ernesto.placidi@ism.cnr.it; Arciprete, F. [Istituto di Struttura della Materia, CNR, Via del Fosso del Cavaliere 100, 00133 Rome (Italy); Università di Roma “Tor Vergata”, Dipartimento di Fisica, via della Ricerca Scientifica 1, 00133 Rome (Italy); Latini, V.; Latini, S.; Patella, F. [Università di Roma “Tor Vergata”, Dipartimento di Fisica, via della Ricerca Scientifica 1, 00133 Rome (Italy); Magri, R. [Dipartimento di Scienze Fisiche, Informatiche e Matematiche (FIM), Università di Modena e Reggio Emilia, and Centro S3 CNR-Istituto Nanoscienze, Via Campi 213/A, 4100 Modena (Italy); Scuderi, M.; Nicotra, G. [CNR-IMM, Strada VIII, 5, 95121 Catania (Italy)

2014-09-15T23:59:59.000Z

32

Micromachined electrostatic vertical actuator  

DOE Patents [OSTI]

A micromachined vertical actuator utilizing a levitational force, such as in electrostatic comb drives, provides vertical actuation that is relatively linear in actuation for control, and can be readily combined with parallel plate capacitive position sensing for position control. The micromachined electrostatic vertical actuator provides accurate movement in the sub-micron to micron ranges which is desirable in the phase modulation instrument, such as optical phase shifting. For example, compact, inexpensive, and position controllable micromirrors utilizing an electrostatic vertical actuator can replace the large, expensive, and difficult-to-maintain piezoelectric actuators. A thirty pound piezoelectric actuator with corner cube reflectors, as utilized in a phase shifting diffraction interferometer can be replaced with a micromirror and a lens. For any very precise and small amplitudes of motion` micromachined electrostatic actuation may be used because it is the most compact in size, with low power consumption and has more straightforward sensing and control options.

Lee, Abraham P. (Walnut Creek, CA); Sommargren, Gary E. (Santa Cruz, CA); McConaghy, Charles F. (Livermore, CA); Krulevitch, Peter A. (Pleasanton, CA)

1999-10-19T23:59:59.000Z

33

Vertically Integrated Circuits at Fermilab  

SciTech Connect (OSTI)

The exploration of the vertically integrated circuits, also commonly known as 3D-IC technology, for applications in radiation detection started at Fermilab in 2006. This paper examines the opportunities that vertical integration offers by looking at various 3D designs that have been completed by Fermilab. The emphasis is on opportunities that are presented by through silicon vias (TSV), wafer and circuit thinning and finally fusion bonding techniques to replace conventional bump bonding. Early work by Fermilab has led to an international consortium for the development of 3D-IC circuits for High Energy Physics. The consortium has submitted over 25 different designs for the Fermilab organized MPW run organized for the first time.

Deptuch, Grzegorz; Demarteau, Marcel; Hoff, James; Lipton, Ronald; Shenai, Alpana; Trimpl, Marcel; Yarema, Raymond; Zimmerman, Tom; /Fermilab

2009-01-01T23:59:59.000Z

34

ARM - Measurement - Vertical velocity  

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 May JunDatastreamsmmcrcalgovInstrumentsruc Documentation RUC : XDCResearch Relatedcontentcharacteristics ARM DatagovMeasurementsVertical

35

long-Term Tritium Transport through Field-Scale Compacted Soil Liner  

E-Print Network [OSTI]

long-Term Tritium Transport through Field-Scale Compacted Soil Liner Cecile Toupiol1; Thomas W. Daniel7 Abstract: A l3-year study of tritium transport through a field-scale earthen liner sampling) were used to determine the vertical tritium concentration profiles at different times

36

PATTERI'JSOF VERTICAL AND REPRODUCIIONIN  

E-Print Network [OSTI]

of six corTrrno species of Hawaii-an Oplophoridae are presented. Trvo different patterns of adult conmon species lived above 7OO m and undervrent extensive vertical migrat-ions to shallorver rvaters aE of the adultsl the type of embryonic develop- mentl and Ehe amount of yolk in the embryo aE the time of hatching

Luther, Douglas S.

37

Exact solutions in a model of vertical gas migration  

SciTech Connect (OSTI)

This work is motivated by the growing interest in injectingcarbon dioxide into deep geological formations as a means of avoidingatmospheric emissions of carbon dioxide and consequent global warming.One of the key questions regarding the feasibility of this technology isthe potential rate of leakage out of the primary storage formation. Weseek exact solutions in a model of gas flow driven by a combination ofbuoyancy, viscous and capillary forces. Different combinations of theseforces and characteristic length scales of the processes lead todifferent time scaling and different types of solutions. In the case of athin, tight seal, where the impact of gravity is negligible relative tocapillary and viscous forces, a Ryzhik-type solution implies square-rootof time scaling of plume propagation velocity. In the general case, a gasplume has two stable zones, which can be described by travelling-wavesolutions. The theoretical maximum of the velocity of plume migrationprovides a conservative estimate for the time of vertical migration.Although the top of the plume has low gas saturation, it propagates witha velocity close to the theoretical maximum. The bottom of the plumeflows significantly more slowly at a higher gas saturation. Due to localheterogeneities, the plume can break into parts. Individual plumes alsocan coalesce and from larger plumes. The analytical results are appliedto studying carbon dioxide flow caused by leaks from deep geologicalformations used for CO2 storage. The results are also applicable formodeling flow of natural gas leaking from seasonal gas storage, or formodeling of secondary hydrocarbon migration.

Silin, Dmitriy B.; Patzek, Tad W.; Benson, Sally M.

2006-06-27T23:59:59.000Z

38

Performance Testing of a Small Vertical-Axis Wind Turbine , S. Tullis2  

E-Print Network [OSTI]

Performance Testing of a Small Vertical-Axis Wind Turbine R. Bravo1 , S. Tullis2 , S. Ziada3 of electric production [1]. Although most performance testing for small-scale wind turbines is conducted vertical-axis wind turbines (VAWT) in urban settings, full-scale wind tunnel testing of a prototype 3.5 k

Tullis, Stephen

39

Recirculation on a single stage of vertical flow constructed wetland: treatment limits and operation modes  

E-Print Network [OSTI]

1 Recirculation on a single stage of vertical flow constructed wetland: treatment limits French vertical flow constructed wetlands (VFCWs) plant comprises two stages of treatment which the first and treatment performances in different operating conditions. Results showed good performances

Paris-Sud XI, Université de

40

Generation of large-scale winds in horizontally anisotropic convection  

E-Print Network [OSTI]

We simulate three-dimensional, horizontally periodic Rayleigh-B\\'enard convection between free-slip horizontal plates, rotating about a horizontal axis. When both the temperature difference between the plates and the rotation rate are sufficiently large, a strong horizontal wind is generated that is perpendicular to both the rotation vector and the gravity vector. The wind is turbulent, large-scale, and vertically sheared. Horizontal anisotropy, engendered here by rotation, appears necessary for such wind generation. Most of the kinetic energy of the flow resides in the wind, and the vertical turbulent heat flux is much lower on average than when there is no wind.

von Hardenberg, J; Provenzale, A; Spiegel, E A

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Vertical axis wind turbine airfoil  

DOE Patents [OSTI]

A vertical axis wind turbine airfoil is described. The wind turbine airfoil can include a leading edge, a trailing edge, an upper curved surface, a lower curved surface, and a centerline running between the upper surface and the lower surface and from the leading edge to the trailing edge. The airfoil can be configured so that the distance between the centerline and the upper surface is the same as the distance between the centerline and the lower surface at all points along the length of the airfoil. A plurality of such airfoils can be included in a vertical axis wind turbine. These airfoils can be vertically disposed and can rotate about a vertical axis.

Krivcov, Vladimir; Krivospitski, Vladimir; Maksimov, Vasili; Halstead, Richard; Grahov, Jurij Vasiljevich

2012-12-18T23:59:59.000Z

42

Pore-scale flow characterization of low-interfacial tension flow through mixed-wet porous media with different pore geometries  

SciTech Connect (OSTI)

The low-interfacial tension flow through porous media occurs in surfactant-based enhanced oil recovery (EOR), soil clean-up, underground removal of the non-aqueous phase liquid and dense non-aqueous phase liquid, etc. In surfactant-based EOR processes, numerous works have been carried out to characterize - either qualitatively or quantitatively - the micro- and macro-scale flow behavior. What has been lacking is to link the statistics of oil blobs population (e.g., distribution of blob length and diameter) to the pore-scale phenomena and macro-scale quantities. In particular, no work has been reported to elucidate the effect of the ratio of pore body to throat diameter (i.e., aspect ratio) on the pore-scale characterization based on the blobs population statistics. The significance of the aspect ratio lies in that it describes the geometry of a porous medium and is one of the foremost morphological features. The aspect ratio is also one of the fundamental factors governing the pore-level events. This study presents the effect of aspect ratio on the statistical distribution of the blob length and equivalent diameter and links the blobs population statistics to the observed pore-level events. The pore-scale variation of the ratio of viscous-to-capillary forces acted on the oil blobs at the threshold of displacement is utilized to characterize the effect of blob length distribution at different aspect ratios. It also provides some insight into correlating the change in oil recovery efficiency and capillary number, by change in aspect ratio, with the change in blobs population statistics. (author)

Yadali Jamaloei, Benyamin [Petroleum Systems Engineering Department, Faculty of Engineering and Applied Science, The University of Regina, Regina, Saskatchewan (Canada); Petroleum Research Center, The Petroleum University of Technology, Tehran (Iran, Islamic Republic of); Asghari, Koorosh [Petroleum Systems Engineering Department, Faculty of Engineering and Applied Science, The University of Regina, Regina, Saskatchewan (Canada); Kharrat, Riyaz [Petroleum Research Center, The Petroleum University of Technology, Tehran (Iran, Islamic Republic of)

2011-01-15T23:59:59.000Z

43

MODELING OF VERTICAL GROUND LOOP HEAT EXCHANGERS FOR GROUND SOURCE  

E-Print Network [OSTI]

MODELING OF VERTICAL GROUND LOOP HEAT EXCHANGERS FOR GROUND SOURCE HEAT PUMP SYSTEMS By CENK SOURCE HEAT PUMP SYSTEMS Thesis Approved: ___________________________________________ Thesis Adviser scale test data. The short-term behavior of ground-coupled heat pump systems is important for the design

44

Blade Offset and Pitch Effects on a High Solidity Vertical Axis Wind Turbine  

E-Print Network [OSTI]

Blade Offset and Pitch Effects on a High Solidity Vertical Axis Wind Turbine Andrzej J. Fiedler ABSTRACT A high solidity, small scale, 2.5m diameter by 3m high Vertical Axis Wind Turbine (VAWT in an open-air wind tunnel facility to investigate the effects of preset toe-in and toe-out turbine blade

Tullis, Stephen

45

CFD Simulation of Dynamic Thrust and Radial Forces on a Vertical Axis Wind Turbine Blade  

E-Print Network [OSTI]

CFD Simulation of Dynamic Thrust and Radial Forces on a Vertical Axis Wind Turbine Blade K. Mc vibration source of a small scale vertical axis wind turbine. The dynamic loading on the blades of the turbine, as they rotate about the central shaft and travel through a range of relative angles of attack

Tullis, Stephen

46

Vibration Analysis of a Vertical Axis Wind Turbine Blade , S.Tullis 2  

E-Print Network [OSTI]

Vibration Analysis of a Vertical Axis Wind Turbine Blade K. Mc Laren 1 , S.Tullis 2 and S.Ziada 3 1 vibration source of a small-scale vertical axis wind turbine currently undergoing field-testing. The turbine at a blade-tip speed ratio (the ratio of the blade rotational velocity to the ambient wind velocity) of 1

Tullis, Stephen

47

Wind speed vertical distribution at Mt. Graham  

E-Print Network [OSTI]

The characterization of the wind speed vertical distribution V(h) is fundamental for an astronomical site for many different reasons: (1) the wind speed shear contributes to trigger optical turbulence in the whole troposphere, (2) a few of the astroclimatic parameters such as the wavefront coherence time (tau_0) depends directly on V(h), (3) the equivalent velocity V_0, controlling the frequency at which the adaptive optics systems have to run to work properly, depends on the vertical distribution of the wind speed and optical turbulence. Also, a too strong wind speed near the ground can introduce vibrations in the telescope structures. The wind speed at a precise pressure (200 hPa) has frequently been used to retrieve indications concerning the tau_0 and the frequency limits imposed to all instrumentation based on adaptive optics systems, but more recently it has been proved that V_200 (wind speed at 200 hPa) alone is not sufficient to provide exhaustive elements concerning this topic and that the vertical d...

Hagelin, S; Lascaux, F

2010-01-01T23:59:59.000Z

48

Standardized Total Average Toxicity Score: A Scale- and Grade-Independent Measure of Late Radiotherapy Toxicity to Facilitate Pooling of Data From Different Studies  

SciTech Connect (OSTI)

Purpose: The search for clinical and biologic biomarkers associated with late radiotherapy toxicity is hindered by the use of multiple and different endpoints from a variety of scoring systems, hampering comparisons across studies and pooling of data. We propose a novel metric, the Standardized Total Average Toxicity (STAT) score, to try to overcome these difficulties. Methods and Materials: STAT scores were derived for 1010 patients from the Cambridge breast intensity-modulated radiotherapy trial and 493 women from University Hospitals of Leicester. The sensitivity of the STAT score to detect differences between patient groups, stratified by factors known to influence late toxicity, was compared with that of individual endpoints. Analysis of residuals was used to quantify the effect of these covariates. Results: In the Cambridge cohort, STAT scores detected differences (p < 0.00005) between patients attributable to breast volume, surgical specimen weight, dosimetry, acute toxicity, radiation boost to tumor bed, postoperative infection, and smoking (p < 0.0002), with no loss of sensitivity over individual toxicity endpoints. Diabetes (p = 0.017), poor postoperative surgical cosmesis (p = 0.0036), use of chemotherapy (p = 0.0054), and increasing age (p = 0.041) were also associated with increased STAT score. When the Cambridge and Leicester datasets were combined, STAT was associated with smoking status (p < 0.00005), diabetes (p = 0.041), chemotherapy (p = 0.0008), and radiotherapy boost (p = 0.0001). STAT was independent of the toxicity scale used and was able to deal with missing data. There were correlations between residuals of the STAT score obtained using different toxicity scales (r > 0.86, p < 0.00005 for both datasets). Conclusions: The STAT score may be used to facilitate the analysis of overall late radiation toxicity, from multiple trials or centers, in studies of possible genetic and nongenetic determinants of radiotherapy toxicity.

Barnett, Gillian C., E-mail: gillbarnett@doctors.org.uk [University of Cambridge Department of Oncology, Oncology Centre, Cambridge (United Kingdom); Cancer Research-UK Centre for Genetic Epidemiology and Department of Oncology, Strangeways Research Laboratories, Cambridge (United Kingdom); West, Catharine M.L. [School of Cancer and Enabling Sciences, Manchester Academic Health Science Centre, University of Manchester, Christie Hospital, Manchester (United Kingdom); Coles, Charlotte E. [University of Cambridge Department of Oncology, Oncology Centre, Cambridge (United Kingdom); Pharoah, Paul D.P. [Cancer Research-UK Centre for Genetic Epidemiology and Department of Oncology, Strangeways Research Laboratories, Cambridge (United Kingdom); Talbot, Christopher J. [Department of Genetics, University of Leicester, Leicester (United Kingdom); Elliott, Rebecca M. [School of Cancer and Enabling Sciences, Manchester Academic Health Science Centre, University of Manchester, Christie Hospital, Manchester (United Kingdom); Tanteles, George A. [Department of Clinical Genetics, University Hospitals of Leicester, Leicester (United Kingdom); Symonds, R. Paul [Department of Cancer Studies and Molecular Medicine, University Hospitals of Leicester, Leicester (United Kingdom); Wilkinson, Jennifer S. [University of Cambridge Department of Oncology, Oncology Centre, Cambridge (United Kingdom); Dunning, Alison M. [Cancer Research-UK Centre for Genetic Epidemiology and Department of Oncology, Strangeways Research Laboratories, Cambridge (United Kingdom); Burnet, Neil G. [University of Cambridge Department of Oncology, Oncology Centre, Cambridge (United Kingdom); Bentzen, Soren M. [University of Wisconsin, School of Medicine and Public Health, Department of Human Oncology, Madison, WI (United States)

2012-03-01T23:59:59.000Z

49

Vertical Relationships and Competition in Retail Gasoline Markets  

E-Print Network [OSTI]

PWP-075 Vertical Relationships and Competition in Retail Gasoline Markets: Empirical Evidence from in Retail Gasoline Markets Empirical Evidence from Contract Changes in Southern California Justine S, if any, of the differences in retail gasoline prices between markets is attributable to differences

California at Berkeley. University of

50

7, 1275112779, 2007 Vertical distribution  

E-Print Network [OSTI]

. In an urban area there are many buildings, which cause large inhomogeneities in the energy and wind profilesACPD 7, 12751­12779, 2007 Vertical distribution of O3 and VOCs in Mexico City E. Velasco et al of Mexico City E. Velasco1,2 , C. M´arquez3 , E. Bueno3 , R. M. Bernab´e3 , A. S´anchez3 , O. Fentanes 3 , H

Boyer, Edmond

51

ARM - Evaluation Product - Vertical Air Motion during Large-Scale  

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 May JunDatastreamsmmcrcal Documentation(AVIRIS) ProductsAirborne Visible/InfraredProductsMicroPulse LIDAR

52

P-type and N-type multi-gate polycrystalline silicon vertical thin film transistors based on low-temperature technology  

E-Print Network [OSTI]

is obtained. P-type and N-type vertical TFTs have shown symmetric electrical characteristics. DifferentP-type and N-type multi-gate polycrystalline silicon vertical thin film transistors based on low) ABSTRACT P-type and N-type multi-gate vertical thin film transistors (vertical TFTs) have been fabricated

Boyer, Edmond

53

Vertical Integration and Technology: Theory and Evidence  

E-Print Network [OSTI]

We study the determinants of vertical integration. We first derive a number of predictions regarding the relationship between technology intensity and vertical integration from a simple incomplete contracts model. Then, ...

Acemoglu, Daron

54

Scale invariability  

E-Print Network [OSTI]

I recently demonstrated that the Earth is a forced mechanical oscillator in which springtide induced magnification of all-masses resonance causes tectonics. I here generalize this georesonator concept so to make it apply to any body, anywhere in all the universes and at all times. It turns out that there is no distinction between physics at intergalactic, mechanist, quantum, and smaller scales. Instead of being a constant (of proportionality of physics at all scales), G is a parameter of most general form: G = s e^2, nonlinearly varying amongst different scales s. The so called scale variability of physics but not of G, imagined as such by Planck and Einstein, is due to springtide-induced extreme resonance of Earth masses, critically impeding terrestrial experiments for estimating G, while providing artificial settings for quantum experiments to all trivially "work". I propose that reality is a system of near infinitely many magnifying oscillators where permanent energy decay of all oscillation naturally forb...

Omerbashich, M

2008-01-01T23:59:59.000Z

55

A Bootstrap Technique for Testing the Relationship Between Local-Scale Radar Observations of Cloud Occurrence and Large-Scale Atmospheric Fields  

SciTech Connect (OSTI)

In this paper an atmospheric classification scheme based on fields that are resolved by global climate models (and numerical weather prediction models) is investigated as a mechanism to map the large-scale (synoptic-scale) atmospheric state to distributions of local-scale cloud properties. Using a bootstrap resampling technique, the temporal stability and distinctness of vertical profiles of cloud occurrence (obtained from a vertically pointing millimeter wavelength cloud-radar) are analyzed as a function of the atmospheric state. A stable class-based map from the large-scale to local-scale cloud properties could be of great utility in the analysis of GCM-predicted cloud properties, by providing a physical context from which to understand any differences between the model output and observations, as well as to separate differences (in total distribution) that are caused by having different weather regimes (or synoptic scale activity) rather than problems in the representation of clouds for a particular regime. Furthermore, if sufficiently robust mappings can be established, it could form the basis of a statistical GCM cloud parameterization.

Marchand, Roger T.; Beagley, Nathaniel; Thompson, Sandra E.; Ackerman, Thomas P.; Schultz, David M.

2006-11-01T23:59:59.000Z

56

Vertical Relationships and Competition in Retail Gasoline Markets: An Empirical Evidence from Contract Changes in Southern California  

E-Print Network [OSTI]

The Behavior of Retail Gasoline Prices: Symmetric or Not? ”vertical contracts and retail gasoline prices. The thirdthe differences in retail gasoline prices between markets is

Hastings, Justine

2000-01-01T23:59:59.000Z

57

Vertical two chamber reaction furnace  

DOE Patents [OSTI]

A vertical two chamber reaction furnace. The furnace comprises a lower chamber having an independently operable first heating means for heating the lower chamber and a gas inlet means for admitting a gas to create an ambient atmosphere, and an upper chamber disposed above the lower chamber and having an independently operable second heating means for heating the upper chamber. Disposed between the lower chamber and the upper chamber is a vapor permeable diffusion partition. The upper chamber has a conveyor means for conveying a reactant there through. Of particular importance is the thallinating of long-length thallium-barium-calcium-copper oxide (TBCCO) or barium-calcium-copper oxide (BCCO) precursor tapes or wires conveyed through the upper chamber to thereby effectuate the deposition of vaporized thallium (being so vaporized as the first reactant in the lower chamber at a temperature between about 700.degree. and 800.degree. C.) on TBCCO or BCCO tape or wire (the second reactant) at its simultaneous annealing temperature in the upper chamber of about 800.degree. to 950.degree. C. to thereby replace thallium oxide lost from TBCCO tape or wire because of the high annealing temperature or to deposit thallium on BCCO tape or wire. Continuously moving the tape or wire provides a single-step process that effectuates production of long-length TBCCO superconducting product.

Blaugher, Richard D. (Evergreen, CO)

1999-03-16T23:59:59.000Z

58

Downstream Competition, Foreclosure, and Vertical Integration  

E-Print Network [OSTI]

Downstream Competition, Foreclosure, and Vertical Integration Gilles Chemla ¤ July 8, 2002 and Management Strategy 12, 2 (2003) 261-289." #12;Downstream Competition, Forclosure, and Vertical Integration Abstract This paper analyzes the impact of competition among downstream ¯rms on an upstream ¯rm's payo

Paris-Sud XI, Université de

59

Development and application of new methods to retrieve vertical structure of precipitation above the ARM CART sites from MMCR measurementsÃ?  

SciTech Connect (OSTI)

The main objective of this project was to develop, validate and apply remote sensing methods to retrieve vertical profiles of precipitation over the DOE ARM CART sites using currently available remote sensors. While the ARM Program invested very heavily into developments of remote sensing methods and instruments for water vapor and non-precipitating cloud parameter retrievals, precipitation retrievals and studies lagged behind. Precipitation, however, is a crucial part of the water cycle, and without detailed information on rainfall and snowfall, significant improvements in the atmospheric models of different scales (i.e., one of the ARM Program's main goals) is difficult to achieve. Characterization of the vertical atmospheric column above the CART sites is also incomplete without detailed precipitation information, so developments of remote sensing methods for retrievals of parameters in precipitating cloud condition was essential. Providing modelers with retrieval results was also one of the key objectives of this research project.

Dr. Sergey Matrosov

2010-12-15T23:59:59.000Z

60

Vertical Pretreatment Reactor System (Poster)  

SciTech Connect (OSTI)

IBRF poster developed for the IBRF showcase. Describes the two-vessel system for primary and secondary pretreatment of biomass solids at different temperatures.

Not Available

2012-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Vertical Axis Wind Turbine Foundation parameter study  

SciTech Connect (OSTI)

The dynamic failure criterion governing the dimensions of prototype Vertical Axis Wind Turbine Foundations is treated as a variable parameter. The resulting change in foundation dimensions and costs is examined.

Lodde, P.F.

1980-07-01T23:59:59.000Z

62

Vertical Glider Robots for Subsea Equipment Delivery  

E-Print Network [OSTI]

We have developed an underwater vehicle that offers significant performance improvements over existing sub sea elevators. Our Vertical Glider Robot falls under its own weight to a precise location on the seafloor, employing ...

Reed, Brooks L.

2011-01-01T23:59:59.000Z

63

Subsurface imaging with reverse vertical seismic profiles  

E-Print Network [OSTI]

This thesis presents imaging results from a 3D reverse vertical seismic profile (RVSP) dataset measured at a hydrocarbon bearing pinnacle reef in northern Michigan. The study presented many challenges in seismic data ...

Krasovec, Mary L. (Mary Lee), 1972-

2001-01-01T23:59:59.000Z

64

Nonlinear Saturation of Vertically Propagating Rossby Waves  

E-Print Network [OSTI]

The interaction between vertical Rossby wave propagation and wave breaking is studied in the idealized context of a beta-plane channel model. Considering the problem of propagation through a uniform zonal flow in an ...

Giannitsis, Constantine

65

Sandia National Laboratories: Innovative Offshore Vertical-Axis...  

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

WindInnovative Offshore Vertical-Axis Wind Turbine Rotors Innovative Offshore Vertical-Axis Wind Turbine Rotors This project seeks to advance large offshore vertical-axis wind...

66

Effective hydraulic parameters for steady state vertical flow in heterogeneous soils  

E-Print Network [OSTI]

Effective hydraulic parameters for steady state vertical flow in heterogeneous soils Jianting Zhu August 2003. [1] In hydroclimate and land-atmospheric interaction models, effective hydraulic properties are needed at large grid scales. In this study, the effective soil hydraulic parameters of the areally

Mohanty, Binayak P.

67

Sandia National Laboratories: Sandia Vertical-Axis Wind-Turbine...  

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

ClimateECEnergyComputational Modeling & SimulationSandia Vertical-Axis Wind-Turbine Research Presented at Science of Making Torque from Wind Conference Sandia Vertical-Axis...

68

WHICH HYDRAULIC MODEL TO USE IN VERTICAL FLOW CONSTRUCTED WETLANDS?  

E-Print Network [OSTI]

WHICH HYDRAULIC MODEL TO USE IN VERTICAL FLOW CONSTRUCTED WETLANDS? Ania Morvannoua , Nicolas-equilibrium model, preferential flow path, vertical flow constructed wetlands INTRODUCTION Constructed wetlands (CWs

Paris-Sud XI, Université de

69

Graphene vertical hot-electron terahertz detectors  

SciTech Connect (OSTI)

We propose and analyze the concept of the vertical hot-electron terahertz (THz) graphene-layer detectors (GLDs) based on the double-GL and multiple-GL structures with the barrier layers made of materials with a moderate conduction band off-set (such as tungsten disulfide and related materials). The operation of these detectors is enabled by the thermionic emissions from the GLs enhanced by the electrons heated by incoming THz radiation. Hence, these detectors are the hot-electron bolometric detectors. The electron heating is primarily associated with the intraband absorption (the Drude absorption). In the frame of the developed model, we calculate the responsivity and detectivity as functions of the photon energy, GL doping, and the applied voltage for the GLDs with different number of GLs. The detectors based on the cascade multiple-GL structures can exhibit a substantial photoelectric gain resulting in the elevated responsivity and detectivity. The advantages of the THz detectors under consideration are associated with their high sensitivity to the normal incident radiation and efficient operation at room temperature at the low end of the THz frequency range. Such GLDs with a metal grating, supporting the excitation of plasma oscillations in the GL-structures by the incident THz radiation, can exhibit a strong resonant response at the frequencies of several THz (in the range, where the operation of the conventional detectors based on A{sub 3}B{sub 5} materials, in particular, THz quantum-well detectors, is hindered due to a strong optical phonon radiation absorption in such materials). We also evaluate the characteristics of GLDs in the mid- and far-infrared ranges where the electron heating is due to the interband absorption in GLs.

Ryzhii, V., E-mail: v-ryzhii@riec.tohoku.ac.jp [Research Institute for Electrical Communication, Tohoku University, Sendai 980-8577 (Japan); Center for Photonics and Infrared Engineering, Bauman Moscow State Technical University and Institute of Ultra High Frequency Semiconductor Electronics, Russian Academy of Sciences, Moscow 111005 (Russian Federation); Satou, A.; Otsuji, T. [Research Institute for Electrical Communication, Tohoku University, Sendai 980-8577 (Japan); Ryzhii, M. [Department of Computer Science and Engineering, University of Aizu, Aizu-Wakamatsu 965-8580 (Japan); Mitin, V. [Department of Electrical Engineering, University at Buffalo, Buffalo, New York 1460-1920 (United States); Shur, M. S. [Departments of Electrical, Electronics, and Systems Engineering and Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180 (United States)

2014-09-21T23:59:59.000Z

70

Medium-solidity Vertical Axis Wind Turbines for use in Urban Environments S. Tullis, A. Fiedler, K. McLaren, S. Ziada  

E-Print Network [OSTI]

Medium-solidity Vertical Axis Wind Turbines for use in Urban Environments S. Tullis, A. Fiedler, K Vertical axis wind turbines are currently experiencing a renewed interest in small- scale applications loadings as the turbine rotates. One technique to reduce vibration is to reduce the turbine rotational

Tullis, Stephen

71

Self-aligned process for forming microlenses at the tips of vertical silicon nanowires by atomic layer deposition  

SciTech Connect (OSTI)

The microlens is a key enabling technology in optoelectronics, permitting light to be efficiently coupled to and from devices such as image sensors and light-emitting diodes. Their ubiquitous nature motivates the development of new fabrication techniques, since existing methods face challenges as microlenses are scaled to smaller dimensions. Here, the authors demonstrate the formation of microlenses at the tips of vertically oriented silicon nanowires via a rapid atomic layer deposition process. The nature of the process is such that the microlenses are centered on the nanowires, and there is a self-limiting effect on the final sizes of the microlenses arising from the nanowire spacing. Finite difference time domain electromagnetic simulations are performed of microlens focusing properties, including showing their ability to enhance visible-wavelength absorption in silicon nanowires.

Dan, Yaping, E-mail: yaping.dan@sjtu.edu.cn; Chen, Kaixiang [University of Michigan–Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240 (China); Crozier, Kenneth B. [School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States)

2015-01-01T23:59:59.000Z

72

A low order model for vertical axis wind turbines  

E-Print Network [OSTI]

A new computational model for initial sizing and performance prediction of vertical axis wind turbines

Drela, Mark

73

Scale invariability  

E-Print Network [OSTI]

I recently demonstrated that the Earth is a mechanical oscillator in which springtide induced magnification of all-masses resonance forces tectonics. I here generalize this georesonator concept so to make it apply to any body, anywhere in all the universes, and at all times. It turns out that there is no distinction between physics at intergalactic, mechanist, quantum, and smaller scales. Instead of being a constant (of proportionality of physics at all scales), G is a parameter of most general form: G = s e^2, nonlinearly varying amongst different scales s. The so called scale variability of physics but not of G, imagined as such by Planck and Einstein, is due to springtide-induced extreme resonance of Earth masses critically impeding terrestrial experiments for estimating G, while providing artificial settings for quantum experiments to all trivially "work". Thus the derived equation is that of levitation. Reality is a system of near infinitely many magnifying oscillators, where permanent energy decay of all oscillation forbids constancy of known "physical constants". This hyperresonator concept explains the magnetism (as every forced oscillator feature), as well as the gravitation (as forward propagation of mechanical vibrations along the aether i.e. throughout the vacuum structure). To test my claim I propose a Space mission to collect on site measurements of eigenperiods of the Sun, its planets, and their satellites. The levitation equitation enables propulsionless Space travel via gravity sailing: Space vehicle hull ought to be engineered so as to automatically adjust its grave mode, to the vehicle instant gravitational surroundings, akin to trout up swimming.

M. Omerbashich

2010-02-09T23:59:59.000Z

74

SGP and TWP (Manus) Ice Cloud Vertical Velocities  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Daily netcdf-files of ice-cloud dynamics observed at the ARM sites at SGP (Jan1997-Dec2010) and Manus (Jul1999-Dec2010). The files include variables at different time resolution (10s, 20min, 1hr). Profiles of radar reflectivity factor (dbz), Doppler velocity (vel) as well as retrieved vertical air motion (V_air) and reflectivity-weighted particle terminal fall velocity (V_ter) are given at 10s, 20min and 1hr resolution. Retrieved V_air and V_ter follow radar notation, so positive values indicate downward motion. Lower level clouds are removed, however a multi-layer flag is included.

Kalesse, Heike

75

SGP and TWP (Manus) Ice Cloud Vertical Velocities  

SciTech Connect (OSTI)

Daily netcdf-files of ice-cloud dynamics observed at the ARM sites at SGP (Jan1997-Dec2010) and Manus (Jul1999-Dec2010). The files include variables at different time resolution (10s, 20min, 1hr). Profiles of radar reflectivity factor (dbz), Doppler velocity (vel) as well as retrieved vertical air motion (V_air) and reflectivity-weighted particle terminal fall velocity (V_ter) are given at 10s, 20min and 1hr resolution. Retrieved V_air and V_ter follow radar notation, so positive values indicate downward motion. Lower level clouds are removed, however a multi-layer flag is included.

Kalesse, Heike

2013-06-27T23:59:59.000Z

76

Building Scale DC Microgrids  

E-Print Network [OSTI]

resources, a 10 kW vertical axis wind turbine, and Fig. 4AC-grid Fig. 3. Vertical axis wind turbine in the AIT DC µ

Marnay, Chris

2013-01-01T23:59:59.000Z

77

Building Scale DC Microgrids  

E-Print Network [OSTI]

resources, a 10 kW vertical axis wind turbine, and Fig. 4the µgrid Fig. 3. Vertical axis wind turbine in the AIT DC µ

Marnay, Chris

2014-01-01T23:59:59.000Z

78

Electrically floating, near vertical incidence, skywave antenna  

DOE Patents [OSTI]

An Electrically Floating, Near Vertical Incidence, Skywave (NVIS) Antenna comprising an antenna element, a floating ground element, and a grounding element. At least part of said floating ground element is positioned between said antenna element and said grounding element. The antenna is separated from the floating ground element and the grounding element by one or more electrical insulators. The floating ground element is separated from said antenna and said grounding element by one or more electrical insulators.

Anderson, Allen A.; Kaser, Timothy G.; Tremblay, Paul A.; Mays, Belva L.

2014-07-08T23:59:59.000Z

79

Mass transfer at vertically oscillating surfaces  

SciTech Connect (OSTI)

An analysis of mass transfer at vertically oscillating surfaces is presented. It takes into account the interaction between forced and natural convection and can be used under conditions where the fluid velocity outside the boundary layer changes direction. Because of the good agreement with experimental data, the model can explain the multi-fold increase in mass transfer coefficient obtained under oscillatory conditions. 8 refs., 3 figs.

Gomaa, H.G. [Ontario Hydro Nuclear, Tiverton, Ontario (Canada); Landau, J. [Univ. of New Brunswick, Fredericton, NB (Canada); Tawell, A.M.A. [Technical Univ. of Nova Scotia, Halifax, NS (Canada)

1996-12-31T23:59:59.000Z

80

Cultural differences on the children's memory scale  

E-Print Network [OSTI]

, & Bouma, 1988). The right parietal cortex of the brain is associated with visual and spatial process and visual association (Zillmer & Spiers, 2001). With increased age and schooling, there is a strong relationship between reading performance and left... temporal cortex activation (Licht et al., 1988). The left temporal cortex is associated with receiving and interpreting auditory information (Zillmer & Spiers, 2001). Cross Cultural Impact on Mnemonic Processes. Cross cultural studies have investigated...

Cash, Deborah Dyer

2009-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Vertical axis wind turbine with continuous blade angle adjustment  

E-Print Network [OSTI]

The author presents a concept for a vertical axis wind turbine that utilizes each blade's entire rotational cycle for power generation. Each blade has its own vertical axis of rotation and is constrained to rotate at the ...

Weiss, Samuel Bruce

2010-01-01T23:59:59.000Z

82

acesso transeptal vertical: Topics by E-print Network  

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

or itemsets is a fundamental and essential problem in many data miningFast Vertical Mining Using Diffsets Mohammed J. Zaki and Karam Gouda Computer Science Dept of vertical...

83

Marine vertical cable multiple attenuation beyond up/down separation  

E-Print Network [OSTI]

Marine vertical cable acquisition is an emerging technology. It represents an alternative to surface seismic acquisition in areas congested by platforms or other obstacles. The vertical cable acquisition consists of recording pressure at several...

Tran, Andre

2001-01-01T23:59:59.000Z

84

Observation Method to Predict Meander Migration and Vertical Degradation of Rivers  

E-Print Network [OSTI]

examples of bridges that were in danger of structural damage due to excessive erosion are presented herein. The Burr’s Ferry Bridge on the Sabine River, shown in Figure 1, was built over 80 years ago and is on the state line between Texas and Louisiana... and laboratory tests (full scale experimental study). ? Develop a model that relates the soil erodibility, river flow, and past observations with the meander migration and vertical degradation. ? Develop a method (called Observation Method) using computer...

Montalvo Bartolomei, Axel M

2014-03-05T23:59:59.000Z

85

Maximizing Vertical Air on a Quarter Pipe February 14, 2011  

E-Print Network [OSTI]

Maximizing Vertical Air on a Quarter Pipe February 14, 2011 Abstract The current record for maximum vertical air achieved by a snow- boarder on a half pipe is 24 feet and 11 inches. We wish to construct a number of moves. To optimize vertical air we suggest a quarter pipe were incoming velocity and therefore

Morrow, James A.

86

Vertical Flowmeter Test | Open Energy Information  

Open Energy Info (EERE)

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: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160 East 300 South Place: Salt Lake City, UtahResources/Full Version <VertexVertical

87

The Development of an Innovative Vertical Floatation Melter and Scrap Dryer for Use in the Aluminum Processing Industry  

SciTech Connect (OSTI)

The project aimed at the development of a Vertical Floatation melter, for application to the aluminum industry. This is intended to improve both the energy efficiency and environmental performance of aluminum melting furnaces. Phase I of this project dealt primarily with the initial research effort. Phase II, dealt with pilot-scale testing.

Robert De Saro

2004-08-24T23:59:59.000Z

88

Lower-Tropospheric Height Tendencies Associated with the Shearwise and Transverse Components of Quasigeostrophic Vertical Motion  

E-Print Network [OSTI]

of the separate lower-tropospheric height tendencies associated with the shearwise and transverse portions of QG- cluded surface cyclone are driven nearly equally by shearwise and transverse updrafts. 1. Introduction cyclones. He presented evidence that these two components of the QG vertical motion play different roles

Williams, Justin

89

Control system for a vertical axis windmill  

DOE Patents [OSTI]

A vertical axis windmill having a rotating structure is provided with a series of articulated vertical blades whose positions are controlled to maintain a constant RPM for the rotating structure, when wind speed is sufficient. A microprocessor controller is used to process information on wind speed, wind direction and RPM of the rotating structure to develop an electrical signal for establishing blade position. The preferred embodiment of the invention, when connected to a utility grid, is designed to generate 40 kilowatts of power when exposed to a 20 mile per hour wind. The control system for the windmill includes electrical blade actuators that modulate the blades of the rotating structure. Blade modulation controls the blade angle of attack, which in turn controls the RPM of the rotor. In the preferred embodiment, the microprocessor controller provides the operation logic and control functions. A wind speed sensor provides inputs to start or stop the windmill, and a wind direction sensor is used to keep the blade flip region at 90.degree. and 270.degree. to the wind. The control system is designed to maintain constant rotor RPM when wind speed is between 10 and 40 miles per hour.

Brulle, Robert V. (St. Louis County, MO)

1983-10-18T23:59:59.000Z

90

High vertical resolution crosswell seismic imaging  

DOE Patents [OSTI]

A method for producing high vertical resolution seismic images from crosswell data is disclosed. In accordance with one aspect of the disclosure, a set of vertically spaced, generally horizontally extending continuous layers and associated nodes are defined within a region between two boreholes. The specific number of nodes is selected such that the value of a particular characteristic of the subterranean region at each of the nodes is one which can be determined from the seismic data. Once values are established at the nodes, values of the particular characteristic are assigned to positions between the node points of each layer based on the values at node within that layer and without regard to the values at node points within any other layer. A seismic map is produced using the node values and the assigned values therebetween. In accordance with another aspect of the disclosure, an approximate model of the region is established using direct arrival traveltime data. Thereafter, the approximate model is adjusted using reflected arrival data. In accordance with still another aspect of the disclosure, correction is provided for well deviation. An associated technique which provides improvements in ray tracing is also disclosed.

Lazaratos, Spyridon K. (Houston, TX)

1999-12-07T23:59:59.000Z

91

Vertical axis wind turbine control strategy  

SciTech Connect (OSTI)

Early expensive in automatic operation of the Sandia 17-m vertical axis research wind turbine (VAWT) has demonstrated the need for a systematic study of control algorithms. To this end, a computer model has been developed that uses actual wind time series and turbine performance data to calculate the power produced by the Sandia 17-m VAWT operating in automatic control. The model has been used to investigate the influence of starting algorithms on annual energy production. The results indicate that, depending on turbine and local wind characteristics, a bad choice of a control algorithm can significantly reduce overall energy production. The model can be used to select control algorithms and threshold parameters that maximize long-term energy production. An attempt has been made to generalize these results from local site and turbine characteristics to obtain general guidelines for control algorithm design.

McNerney, G.M.

1981-08-01T23:59:59.000Z

92

A new concept of vertically integrated pattern recognition associative memory  

SciTech Connect (OSTI)

Hardware-based pattern recognition for fast triggering on particle tracks has been successfully used in high-energy physics experiments for some time. The CDF Silicon Vertex Trigger (SVT) at the Fermilab Tevatron is an excellent example. The method used there, developed in the 1990's, is based on algorithms that use a massively parallel associative memory architecture to identify patterns efficiently at high speed. However, due to much higher occupancy and event rates at the LHC, and the fact that the LHC detectors have a much larger number of channels in their tracking detectors, there is an enormous challenge in implementing fast pattern recognition for a track trigger, requiring about three orders of magnitude more associative memory patterns than what was used in the original CDF SVT. Scaling of current technologies is unlikely to satisfy the scientific needs of the future, and investments in transformational new technologies need to be made. In this paper, we will discuss a new concept of using the emerging 3D vertical integration technology to significantly advance the state-of-the-art for fast pattern recognition within and outside HEP. A generic R and D proposal based on this new concept, with a few institutions involved, has recently been submitted to DOE with the goal to design and perform the ASIC engineering necessary to realize a prototype device. The progress of this R and D project will be reported in the future. Here we will only focus on the concept of this new approach.

Liu, Ted; Hoff, Jim; Deptuch, Grzegorz; Yarema, Ray; /Fermilab; ,

2011-11-01T23:59:59.000Z

93

Effect of surfactant on evaporative heat transfer coefficients in vertical film forced convection  

E-Print Network [OSTI]

for different concentrations of surfactant (log-log scale) (Boiling liquid flow rate of 1. 025 gpm) Evaporative coefficient as function of tempera- ture drop over the liquid film for different concentrations of surfactant (log-log scale) (Boiling liquid... flow rate of 1. 275 gpm) Evaporative coefficient as function of tempera- ture drop over the liquid film for different concentrations of surfactant (log-log scale) (Boiling liquid flow rate of 1. 55 gpm) 47 84 85 86 87 10 Evaporative...

Shah, Basit Husain

1972-01-01T23:59:59.000Z

94

Vertical Electrical Sounding Configurations At Mt Princeton Hot...  

Open Energy Info (EERE)

navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Vertical Electrical Sounding Configurations At Mt Princeton Hot Springs Geothermal Area (Zohdy, Et Al.,...

95

Preparation and Characterisation of Vertically Aligned Carbon Nanotubes.  

E-Print Network [OSTI]

??This thesis presents the preparation of vertically aligned carbon nanotubes using porous anodic alumina templates via thermal chemical vapour deposition. The characteristics of prepared carbon… (more)

Xu, Rui

2010-01-01T23:59:59.000Z

96

Experimental wave effect on vertical relative motion  

E-Print Network [OSTI]

of the most probable peak value of the different modes of motion indicates that the linear theory tends to overpredict....

Padmanabhan, Rajith

2007-09-17T23:59:59.000Z

97

Hedging and Vertical Integration in Electricity Markets Gilles Chemla  

E-Print Network [OSTI]

/or demand insurance rationale for vertical integration as most important. 1 In the 1970s, for example, oil and vertical integration are two separate mechanisms for demand and spot price risk diversification that both integration restores the symmetry between producers' and retailers' exposure to demand risk while linear

Touzi, Nizar

98

Steerable vertical to horizontal energy transducer for mobile robots  

DOE Patents [OSTI]

The present invention provides a steerable vertical to horizontal energy transducer for mobile robots that less complex and requires less power than two degree of freedom tilt mechanisms. The present invention comprises an end effector that, when mounted with a hopping actuator, translates along axis (typically vertical) actuation into combined vertical and horizontal motion. The end effector, or foot, mounts with an end of the actuator that moves toward the support surface (typically a floor or the earth). The foot is shaped so that the first contact with the support surface is off the axis of the actuator. Off-axis contact with the support surface generates an on-axis force (typically resulting in vertical motion) and a moment orthogonal to the axis. The moment initiates a horizontal tumbling motion, and tilts the actuator so that its axis is oriented with a horizontal component and continued actuation generates both vertical and horizontal force.

Spletzer, Barry L. (Albuquerque, NM); Fischer, Gary J. (Albuquerque, NM); Feddema, John T. (Albuquerque, NM)

2001-01-01T23:59:59.000Z

99

QUANTIFYING HYDROMETEOR ADVECTION AND THE VERTICAL DISTRIBUTION OF CLOUD FRACTION OVER THE SGP CART SITE  

SciTech Connect (OSTI)

A single column model (SCM) is, in essence, an isolated grid column of a general circulation model (GCM). Hence, SCMs have rather demanding input data requirements, but do not suffer from problems associated with balance of a GCM. Among the initial conditions that must be used to describe the initial state of the SCM column are the vertical profile of the horizontal wind components and the vertical profiles of cloud water and ice. In addition, the large-scale divergence and advective tendencies of cloud water and ice must be supplied as external parameters. Finally, the liquid and ice cloud amount as a function of height within the SCM column are required for model evaluation. The scale of the SCM column over which the initial conditions, external parameters, and model evaluation fields must apply is relatively large ({approximately}300 km). To quantify atmospheric structure on this scale, the ARM SGP CART site is located within the NOAA wind profiler network and has boundary and extended measurement facilities in an area compatible with the scale requirements of SCMs. Over an area this size, however, there is often rich mesoscale structure. This mesoscale variability creates a sampling problem that can thwart even the most sophisticated attempts to quantify the initial conditions and external parameters, and to evaluate model performance. There are two approaches that can be used to quantify the time varying quantities required for SCMs: objective analysis and data assimilation. The latter relies on products produced for operational forecasting, while the former involves methods that can be used to combine measurements from various sources to produce synoptic descriptions of the large-scale dynamical and thermodynamic fields. Since data assimilation from operational models introduces the uncertainty of the parameterizations used in the models, most of the focus in the SCM effort has been on developing objective analysis techniques.

MILLER,M.; VERLINDE,J.

1998-03-23T23:59:59.000Z

100

The effect of aerosol vertical profiles on satellite-estimated surface particle sulfate concentrations  

SciTech Connect (OSTI)

The aerosol vertical distribution is an important factor in determining the relationship between satellite retrieved aerosol optical depth (AOD) and ground-level fine particle pollution concentrations. We evaluate how aerosol profiles measured by ground-based lidar and simulated by models can help improve the association between AOD retrieved by the Multi-angle Imaging Spectroradiometer (MISR) and fine particle sulfate (SO4) concentrations using matched data at two lidar sites. At the Goddard Space Flight Center (GSFC) site, both lidar and model aerosol profiles marginally improve the association between SO4 concentrations and MISR fractional AODs, as the correlation coefficient between cross-validation (CV) and observed SO4 concentrations changes from 0.87 for the no-scaling model to 0.88 for models scaled with aerosol vertical profiles. At the GSFC site, a large amount of urban aerosols resides in the well-mixed boundary layer so the column fractional AODs are already excellent indicators of ground-level particle pollution. In contrast, at the Atmospheric Radiation Measurement Program (ARM) site with relatively low aerosol loadings, scaling substantially improves model performance. The correlation coefficient between CV and observed SO4 concentrations is increased from 0.58 for the no-scaling model to 0.76 in the GEOS-Chem scaling model, and the model bias is reduced from 17% to 9%. In summary, despite the inaccuracy due to the coarse horizontal resolution and the challenges of simulating turbulent mixing in the boundary layer, GEOS-Chem simulated aerosol profiles can still improve methods for estimating surface aerosol (SO4) mass from satellite-based AODs, particularly in rural areas where aerosols in the free troposphere and any long-range transport of aerosols can significantly contribute to the column AOD.

Liu, Yang; Wang, Zifeng; Wang, Jun; Ferrare, Richard A.; Newsom, Rob K.; Welton, Ellsworth J.

2011-02-15T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Characterization of Vertical Velocity and Drop Size Distribution Parameters in Widespread Precipitation at ARM Facilities  

SciTech Connect (OSTI)

Extended, high-resolution measurements of vertical air motion and median volume drop diameter D0 in widespread precipitation from three diverse Atmospheric Radiation Measurement Program (ARM) locations [Lamont, Oklahoma, Southern Great Plains site (SGP); Niamey, Niger; and Black Forest, Germany] are presented. The analysis indicates a weak (0-10 cm{sup -1}) downward air motion beneath the melting layer for all three regions, a magnitude that is to within the typical uncertainty of the retrieval methods. On average, the hourly estimated standard deviation of the vertical air motion is 0.25 m s{sup -1} with no pronounced vertical structure. Profiles of D0 vary according to region and rainfall rate. The standard deviation of 1-min-averaged D0 profiles for isolated rainfall rate intervals is 0.3-0.4 mm. Additional insights into the form of the raindrop size distribution are provided using available dual-frequency Doppler velocity observations at SGP. The analysis suggests that gamma functions better explain paired velocity observations and radar retrievals for the Oklahoma dataset. This study will be useful in assessing uncertainties introduced in the measurement of precipitation parameters from ground-based and spaceborne remote sensors that are due to small-scale variability.

Giangrande S. E.; Luke, E. P.; Kollias, P.

2012-02-01T23:59:59.000Z

102

VERTICAL BEAM SIZE CONTROL IN TLS AND TPS.  

SciTech Connect (OSTI)

Vertical beam size control is an important issue in the light source operations. The horizontal-vertical betatron coupling and vertical dispersion were measured and corrected to small values in the TLS 1.5 GeV storage ring. Estimated beam sizes are compared with the measured values. By employing an effective transverse damping system, the vertical beam blow-up due to transverse coherent instabilities, such as the fast-ion beam instability, was suppressed. As a result, the light source is very stable. In NSRRC we are designing an ultra low emittance 3-GeV storage ring and its designed vertical beam size could be as small as a few microns. The ground and mechanic vibration effects, and coherent instabilities could spoil the expected photon brightness due to blow-up of the vertical beam size if not well taken care of. The contributions of these effects to vertical beam size increase will be evaluated and the counter measures to minimize them will be proposed and reported in this paper.

KUO, C.C.; CHEN, J.R.; CHOU, P.J.; CHANG, H.P.; HSU, K.T.; LUO, G.H.; TSAI, H.J.; WANG, D.J.; WANG, M.H.

2006-06-26T23:59:59.000Z

103

The transfer of heat and mass to a vertical plate under frosting conditions  

E-Print Network [OSTI]

THE TRAESFPIR OF HEAT . 'ND NASH 10 A VERTICAL PLATE UNDER FROSTING CONDITIONS A Thesis Louis Joseph Poth, Jr. Submitted to the Graduate School of the Agricultural and Nechanioal College of Texas in partial fulfili ment of the requirements... of the Husselt-Grashof correlation for heat transfer. coefficient of saturation temper ture and concen- tration gradient correlation, for small temper- ature difference. ooefficient of frost specific gravity-thermal oonductivity correlation. coefficient...

Poth, Louis Joseph

1960-01-01T23:59:59.000Z

104

Pressure Responses of a Vertically Hydraulic Fractured Well in a Reservoir with Fractal Structure  

E-Print Network [OSTI]

We obtain an analytical solution for the pressure-transient behavior of a vertically hydraulic fractured well in a heterogeneous reservoir. The heterogeneity of the reservoir is modeled by using the concept of fractal geometry. Such reservoirs are called fractal reservoirs. According to the theory of fractional calculus, a temporal fractional derivative is applied to incorporate the memory properties of the fractal reservoir. The effect of different parameters on the computed wellbore pressure is fully investigated by various synthetic examples.

Razminia, Kambiz; Torres, Delfim F M

2015-01-01T23:59:59.000Z

105

Sidewall containment of liquid metal with vertical alternating magnetic fields  

DOE Patents [OSTI]

An apparatus for containing molten metal using a magnet producing vertical alternating magnetic field positioned adjacent the area in which the molten metal is to be confined. This invention can be adapted particularly to the casting of metal between counter-rotating rollers with the vertical alternating magnetic field used to confine the molten metal at the edges of the rollers. Alternately, the vertical alternating magnetic field can be used as a flow regulator in casting molten metal from an opening in a channel.

Lari, Robert J. (Aurora, IL); Praeg, Walter F. (Palos Park, IL); Turner, Larry R. (Naperville, IL); Battles, James E. (Oak Forest, IL); Hull, John R. (Hinsdale, IL); Rote, Donald M. (Lagrange, IL)

1990-01-01T23:59:59.000Z

106

Sidewall containment of liquid metal with vertical alternating magnetic fields  

DOE Patents [OSTI]

An apparatus for containing molten metal using a magnet producing vertical alternating magnetic field positioned adjacent to the area in which the molten metal is to be confined. This invention can be adapted particularly to the casting of metal between counter-rotating rollers with the vertical alternating magnetic field used to confine the molten metal at the edges of the rollers. Alternately, the vertical alternating magnetic field can be used as a flow regulator in casting molten metal from an opening in a channel. 8 figs.

Lari, R.J.; Praeg, W.F.; Turner, L.R.; Battles, J.E.; Hull, J.R.; Rote, D.M.

1988-06-17T23:59:59.000Z

107

Nuclear scales  

SciTech Connect (OSTI)

Nuclear scales are discussed from the nuclear physics viewpoint. The conventional nuclear potential is characterized as a black box that interpolates nucleon-nucleon (NN) data, while being constrained by the best possible theoretical input. The latter consists of the longer-range parts of the NN force (e.g., OPEP, TPEP, the {pi}-{gamma} force), which can be calculated using chiral perturbation theory and gauged using modern phase-shift analyses. The shorter-range parts of the force are effectively parameterized by moments of the interaction that are independent of the details of the force model, in analogy to chiral perturbation theory. Results of GFMC calculations in light nuclei are interpreted in terms of fundamental scales, which are in good agreement with expectations from chiral effective field theories. Problems with spin-orbit-type observables are noted.

Friar, J.L.

1998-12-01T23:59:59.000Z

108

LOCAL STUDY OF ACCRETION DISKS WITH A STRONG VERTICAL MAGNETIC FIELD: MAGNETOROTATIONAL INSTABILITY AND DISK OUTFLOW  

SciTech Connect (OSTI)

We perform three-dimensional, vertically-stratified, local shearing-box ideal MHD simulations of the magnetorotational instability (MRI) that include a net vertical magnetic flux, which is characterized by midplane plasma {beta}{sub 0} (ratio of gas to magnetic pressure). We have considered {beta}{sub 0} = 10{sup 2}, 10{sup 3}, and 10{sup 4}, and in the first two cases the most unstable linear MRI modes are well resolved in the simulations. We find that the behavior of the MRI turbulence strongly depends on {beta}{sub 0}: the radial transport of angular momentum increases with net vertical flux, achieving {alpha} {approx} 0.08 for {beta} = 10{sup 4} and {alpha} {approx}> 1.0 for {beta}{sub 0} = 100, where {alpha} is the height-integrated and mass-weighted Shakura-Sunyaev parameter. A critical value lies at {beta}{sub 0} {approx} 10{sup 3}: for {beta}{sub 0} {approx}> 10{sup 3}, the disk consists of a gas pressure dominated midplane and a magnetically dominated corona. The turbulent strength increases with net flux, and angular momentum transport is dominated by turbulent fluctuations. The magnetic dynamo that leads to cyclic flips of large-scale fields still exists, but becomes more sporadic as net flux increases. For {beta}{sub 0} {approx}< 10{sup 3}, the entire disk becomes magnetically dominated. The turbulent strength saturates, and the magnetic dynamo is fully quenched. Stronger large-scale fields are generated with increasing net flux, which dominates angular momentum transport. A strong outflow is launched from the disk by the magnetocentrifugal mechanism, and the mass flux increases linearly with net vertical flux and shows sign of saturation at {beta}{sub 0} {approx}< 10{sup 2}. However, the outflow is unlikely to be directly connected to a global wind: for {beta}{sub 0} {approx}> 10{sup 3}, the large-scale field has no permanent bending direction due to dynamo activities, while for {beta}{sub 0} {approx}< 10{sup 3}, the outflows from the top and bottom sides of the disk bend towards opposite directions, inconsistent with a physical disk wind geometry. Global simulations are needed to address the fate of the outflow.

Bai, Xue-Ning; Stone, James M., E-mail: xbai@cfa.harvard.edu [Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544 (United States)

2013-04-10T23:59:59.000Z

109

Large-scale fabrication of vertically aligned ZnO nanowire arrays  

DOE Patents [OSTI]

In a method for growing a nanowire array, a photoresist layer is placed onto a nanowire growth layer configured for growing nanowires therefrom. The photoresist layer is exposed to a coherent light interference pattern that includes periodically alternately spaced dark bands and light bands along a first orientation. The photoresist layer exposed to the coherent light interference pattern along a second orientation, transverse to the first orientation. The photoresist layer developed so as to remove photoresist from areas corresponding to areas of intersection of the dark bands of the interference pattern along the first orientation and the dark bands of the interference pattern along the second orientation, thereby leaving an ordered array of holes passing through the photoresist layer. The photoresist layer and the nanowire growth layer are placed into a nanowire growth environment, thereby growing nanowires from the nanowire growth layer through the array of holes.

Wang, Zhong L; Das, Suman; Xu, Sheng; Yuan, Dajun; Guo, Rui; Wei, Yaguang; Wu, Wenzhuo

2013-02-05T23:59:59.000Z

110

Quadruped Bounding Control with Variable Duty Cycle via Vertical Impulse Scaling  

E-Print Network [OSTI]

This paper introduces a bounding gait control algorithm that allows a successful implementation of duty cycle modulation in the MIT Cheetah 2. Instead of controlling leg stiffness to emulate a ‘springy leg’ inspired from ...

Park, Hae won

111

ARM - PI Product - Cloud-Scale Vertical Velocity and Turbulent Dissipation  

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

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112

Space of the vertices of relativistic spin networks  

E-Print Network [OSTI]

The general solutin to the constraints that define relativistic spin networks vertices is given and their relations with 3-dimensional quantum tetrahedra is dicussed. An alternative way to handle the constraints is also presented.

A. Barbieri

1997-10-06T23:59:59.000Z

113

An ecological perceptual aid for precision vertical landings  

E-Print Network [OSTI]

Pilots of vertical landing vehicles face numerous control challenges which often involve the loss of outside visual perceptual cues or the control of flight parameters within tight constraints. These challenges are often ...

Smith, Cristin Anne

2006-01-01T23:59:59.000Z

114

Vertical velocity in oceanic convection off tropical Australia  

E-Print Network [OSTI]

. . . . . . . v Vl Vl I I 1 3 6 10 Description of the Data Data Processing . . Event Criteria 10 15 21 III RESULTS . . . 26 Cores. Environment 26 34 IV COMPARISON WITH OTHER STUDIES . . . . . 40 Cores... Variations with altitude of median and strongest 10'/o-level statistics of (a) average vertical velocity, (b) maximum vertical velocity, (c) mass flux per unit length normal to the flight track and (d) diameter 32 Figure Page Reconstructed temperature...

Lucas, Christopher

2012-06-07T23:59:59.000Z

115

Characterization of the Lumsden-Lynch vertical elutriator  

E-Print Network [OSTI]

CHARACTERIZATION OF THE LUMSDEN-LYNCH VERTICAL ELUTRIATOR A Thesis by CARL BRIAN GRIMM Submitted to the Graduate College of Texas ASM Unrversity in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August, 19gl... Major Subject: Industrial Hygiene CHARACTERIZATION OF THE LUMSDEN-LYNCH VERTICAL ELUTRIATOR A Thesis by CARL BRIAN GRIMM Approved as to style and content by: (Chairman of ommittee) ( mber) embe (Member) ead of Department) August, 1981 ABSTRACT...

Grimm, Carl Brian

2012-06-07T23:59:59.000Z

116

Three-dimensional Numerical Analysis on Blade Response of Vertical Axis Tidal Current Turbine Under Operational Condition  

SciTech Connect (OSTI)

Tidal power as a large-scale renewable source of energy has been receiving significant attention recently because of its advantages over the wind and other renewal energy sources. The technology used to harvest energy from tidal current is called a tidal current turbine. Though some of the principles of wind turbine design are applicable to tidal current turbines, the design of latter ones need additional considerations like cavitation damage, corrosion etc. for the long-term reliability of such turbines. Depending up on the orientation of axis, tidal current turbines can be classified as vertical axis turbines or horizontal axis turbines. Existing studies on the vertical axis tidal current turbine focus more on the hydrodynamic aspects of the turbine rather than the structural aspects. This paper summarizes our recent efforts to study the integrated hydrodynamic and structural aspects of the vertical axis tidal current turbines. After reviewing existing methods in modeling tidal current turbines, we developed a hybrid approach that combines discrete vortex method -finite element method that can simulate the integrated hydrodynamic and structural response of a vertical axis turbine. This hybrid method was initially employed to analyze a typical three-blade vertical axis turbine. The power coefficient was used to evaluate the hydrodynamic performance, and critical deflection was considered to evaluate the structural reliability. A sensitivity analysis was also conducted with various turbine height-to-radius ratios. The results indicate that both the power output and failure probability increase with the turbine height, suggesting a necessity for optimal design. An attempt to optimize a 3-blade vertical axis turbine design with hybrid method yielded a ratio of turbine height to radius (H/R) about 3.0 for reliable maximum power output.

Li, Ye; Karri, Naveen K.; Wang, Qi

2014-04-30T23:59:59.000Z

117

SMART Scale  

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

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: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l LPROJECTS IN7 Roadmap forDKT.Awards and IncentivesSHARPofofSMART Scale

118

Department of Mechanical Engineering Spring 2013 Green Towers Vertical Aquaponic Microfarm  

E-Print Network [OSTI]

PENNSTATE Department of Mechanical Engineering Spring 2013 Green Towers Vertical Aquaponic gardens" inside of vertically placed, twenty-foot tall shipping containers. The gardens utilize aquaponic

Demirel, Melik C.

119

Experimental evaluation of vertically versus horizontally split yokes for SSC (Superconducting Super Collider) dipole magnets  

SciTech Connect (OSTI)

The yoke in SSC dipole magnets provides mechanical support to the collared coil as well as serving as a magnetic element. The yoke and skin are used to increase the coil prestress and reduce collar deflections under excitation. Yokes split on the vertical or horizontal mid-plane offer different advantages in meeting these objectives. To evaluate the relative merits of the two configuration a 1.8 m model dipole was assembled and tested first with horizontally split and then with vertically split yoke laminations. The magnet was extensively instrumented to measure azimuthal and axial stresses in the coil and the cold mass skin resulting from cooldown and excitation. Mechanical behavior of this magnet with each configuration is compared with that of other long and short models and with calculations. 13 refs., 5 figs.

Strait, J.; Coulter, K.; Jaffery, T.; Kerby, J.; Koska, W.; Lamm, M.J.

1990-05-03T23:59:59.000Z

120

VERTICAL STRUCTURE OF A SUPERNOVA-DRIVEN TURBULENT, MAGNETIZED INTERSTELLAR MEDIUM  

SciTech Connect (OSTI)

Stellar feedback drives the circulation of matter from the disk to the halo of galaxies. We perform three-dimensional magnetohydrodynamic simulations of a vertical column of the interstellar medium with initial conditions typical of the solar circle in which supernovae drive turbulence and determine the vertical stratification of the medium. The simulations were run using a stable, positivity-preserving scheme for ideal MHD implemented in the FLASH code. We find that the majority ( Almost-Equal-To 90%) of the mass is contained in thermally stable temperature regimes of cold molecular and atomic gas at T < 200 K or warm atomic and ionized gas at 5000 K < T < 10{sup 4.2} K, with strong peaks in probability distribution functions of temperature in both the cold and warm regimes. The 200-10{sup 4.2} K gas fills 50%-60% of the volume near the plane, with hotter gas associated with supernova remnants (30%-40%) and cold clouds (<10%) embedded within. At |z| {approx} 1-2 kpc, transition-temperature (10{sup 5} K) gas accounts for most of the mass and volume, while hot gas dominates at |z| > 3 kpc. The magnetic field in our models has no significant impact on the scale heights of gas in each temperature regime; the magnetic tension force is approximately equal to and opposite the magnetic pressure, so the addition of the field does not significantly affect the vertical support of the gas. The addition of a magnetic field does reduce the fraction of gas in the cold (<200 K) regime with a corresponding increase in the fraction of warm ({approx}10{sup 4} K) gas. However, our models lack rotational shear and thus have no large-scale dynamo, which reduces the role of the field in the models compared to reality. The supernovae drive oscillations in the vertical distribution of halo gas, with the period of the oscillations ranging from Almost-Equal-To 30 Myr in the T < 200 K gas to {approx}100 Myr in the 10{sup 6} K gas, in line with predictions by Walters and Cox.

Hill, Alex S.; Matthew Haffner, L. [Department of Astronomy, University of Wisconsin-Madison, Madison, WI (United States); Ryan Joung, M. [Department of Astronomy, Columbia University, New York, NY (United States); Mac Low, Mordecai-Mark [Department of Astrophysics, American Museum of Natural History, New York, NY (United States); Benjamin, Robert A. [Department of Physics, University of Wisconsin-Whitewater, Whitewater, WI (United States); Klingenberg, Christian [Department of Mathematics, Wuerzburg University, Emil Fischer Strasse 30, Wuerzburg (Germany); Waagan, Knut, E-mail: alex.hill@csiro.au [Department of Applied Mathematics, University of Washington, Seattle, WA (United States)

2012-05-10T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Vertical interference pressure testing across a low-permeability zone with unsteady crossflow  

SciTech Connect (OSTI)

Existing analytical models for interpreting vertical interference pressure tests across the low permeability zone in a three-layered reservoir usually assume transient radial flow in the high permeability layers and pseudo-steady vertical crossflow in the intervening tight zone. The neglect of vertical flow in the high permeability layers, and the neglect of radial flow in the tight layer, requires the permeability contrast between these layers to be large. However, when this assumption is satisfied, it is also very likely that the pressure diffusivity in the tight layer is much smaller than that in the high permeability layers. Thus, to be consistent, the flow across the tight layer must be treated as an unsteady diffusive process driven by the transient pressure changes occurring in the high permeability layers. In this paper, the authors extend the analysis by replacing their pseudo-steady crossflow assumption with unsteady crossflow and interpret the crossflow response in terms of near- and far-boundary flow response functions for the tight zone. The inclusion of unsteady crossflow requires one additional dimensionless parameter and results in a set of governing equations that are different from, but are similar to, the equations of the dual-porosity dual-permeability model with unsteady interporosity flow.

Wijesinghe, A.M.; Kececioglu, I.

1986-01-01T23:59:59.000Z

122

Vertical vibration and shape oscillation of acoustically levitated water drops  

SciTech Connect (OSTI)

We present the vertical harmonic vibration of levitated water drops within ultrasound field. The restoring force to maintain such a vibration mode is provided by the resultant force of acoustic radiation force and drop gravity. Experiments reveal that the vibration frequency increases with the aspect ratio for drops with the same volume, which agrees with the theoretical prediction for those cases of nearly equiaxed drops. During the vertical vibration, the floating drops undergo the second order shape oscillation. The shape oscillation frequency is determined to be twice the vibration frequency.

Geng, D. L.; Xie, W. J.; Yan, N.; Wei, B., E-mail: bbwei@nwpu.edu.cn [Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072 (China)

2014-09-08T23:59:59.000Z

123

k-PROTECTED VERTICES IN BINARY SEARCH TREES MIKLOS BONA  

E-Print Network [OSTI]

k-PROTECTED VERTICES IN BINARY SEARCH TREES MIKL´OS B´ONA Abstract. We show that for every k, the probability that a randomly selected vertex of a random binary search tree on n nodes is at distance k - 1. In another model, leaves may represent end-users (customers) of a company, and in that case, it may

Bona, Miklos

124

Two phase pressure drop in inclined and vertical pipes  

E-Print Network [OSTI]

A method of calculating the pressure drop in inclined and vertical oil-gas wells is proposed. The data used to establish the method is from a variety of sources but is largely from air and water flowing in systems close ...

Griffith, P.

1973-01-01T23:59:59.000Z

125

Feedback on vertical velocity. Rotation, convection, self-sustaining process.  

E-Print Network [OSTI]

Feedback on vertical velocity. Rotation, convection, self-sustaining process. Fabian Waleffe the mechanisms involved in the nonlinear feedback from u to v, yielding a self-sustaining process for shear flows feedback from the streak instability into the rolls sufficient to lead to a self-sustaining process

Lebovitz, Norman

126

Cloud vertical distribution from radiosonde, remote sensing, and model simulations  

E-Print Network [OSTI]

Cloud vertical distribution from radiosonde, remote sensing, and model simulations Jinqiang Zhang's radiation budget and atmospheric adiabatic heating. Yet it is among the most difficult quantities to observe Great Plains and along with ground- based and space-borne remote sensing products, use it to evaluate

Li, Zhanqing

127

Characterizing Vertical Mass Flux Profiles in Aeolian Saltation Systems  

E-Print Network [OSTI]

*) - 0.4133 (r^2=0.65). The values of beta ranged from 6.11 ? 17.83 for all the experiments. The Rouse profiles calculated using this approach predict very similar vertical distributions to the observed data and predicted 86% and 81% of the observed...

Farrell, Eugene

2012-07-16T23:59:59.000Z

128

NAVARRO VERTICES AND NORMAL SUBGROUPS IN GROUPS OF ODD ORDER  

E-Print Network [OSTI]

NAVARRO VERTICES AND NORMAL SUBGROUPS IN GROUPS OF ODD ORDER JAMES P. COSSEY Abstract. Let p be a prime and suppose G is a finite solvable group and is an ordinary irreducible character of G. Navarro character of Q, which is unique up to conjugacy. This pair is called the Navarro vertex

Cossey, James P.

129

Acoustic emission analysis on tensile failure of steam-side oxide scales formed on T22 alloy superheater tubes  

SciTech Connect (OSTI)

Failure of steam-side oxide scales on boiler tubes can seriously influence the safety of coal-fired power plants. Uniaxial tensile tests employing acoustic emission (AE) monitoring were performed, in this work, to investigate the failure behavior of steam-side oxide scales on T22 alloy boiler superheater tubes. The characteristic frequency spectra of the captured AE signals were obtained by performing fast Fourier transform. Three distinct peak frequency bands, 100-170, 175-250, and 280-390 kHz, encountered in different testing stages were identified in the frequency spectra, which were confirmed to, respectively, correspond to substrate plastic deformation, oxide vertical cracking, and oxide spalling with the aid of scanning electronic microscopy observations, and can thus be used for distinguishing different oxide failure mechanisms. Finally, the critical cracking strain of the oxide scale and the interfacial shear strength of the oxide/substrate interface were estimated, which are the critical parameters urgently desired for modeling the failure behavior of steam-side oxide scales on boiler tubes of coal-fired power plants.

Huang, Jun-Lin; Zhou, Ke-Yi, E-mail: boiler@seu.edu.cn; Xu, Jian-Qun [Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu Province (China); Wang, Xin-Meng; Tu, Yi-You [School of Materials Science and Engineering, Southeast University, Nanjing 210096, Jiangsu Province (China)

2014-07-28T23:59:59.000Z

130

Large-scale anisotropy in stably stratified rotating flows  

SciTech Connect (OSTI)

We present results from direct numerical simulations of the Boussinesq equations in the presence of rotation and/or stratification, both in the vertical direction. The runs are forced isotropically and randomly at small scales and have spatial resolutions of up to $1024^3$ grid points and Reynolds numbers of $\\approx 1000$. We first show that solutions with negative energy flux and inverse cascades develop in rotating turbulence, whether or not stratification is present. However, the purely stratified case is characterized instead by an early-time, highly anisotropic transfer to large scales with almost zero net isotropic energy flux. This is consistent with previous studies that observed the development of vertically sheared horizontal winds, although only at substantially later times. However, and unlike previous works, when sufficient scale separation is allowed between the forcing scale and the domain size, the total energy displays a perpendicular (horizontal) spectrum with power law behavior compatible with $\\sim k_\\perp^{-5/3}$, including in the absence of rotation. In this latter purely stratified case, such a spectrum is the result of a direct cascade of the energy contained in the large-scale horizontal wind, as is evidenced by a strong positive flux of energy in the parallel direction at all scales including the largest resolved scales.

Marino, Dr. Raffaele [National Center for Atmospheric Research (NCAR); Mininni, Dr. Pablo D. [Universidad de Buenos Aires, Argentina; Rosenberg, Duane L [ORNL; Pouquet, Dr. Annick [National Center for Atmospheric Research (NCAR)

2014-01-01T23:59:59.000Z

131

Physics of vertically integrated waveguide photodetectors and amplifiers. Final report  

SciTech Connect (OSTI)

This report describes the efforts supported by LLNL under the Subcontract No. B239593 at the University of Arizona during the Fiscal Year 1992. A solid physical foundation has been developed for understanding the operation of vertically integrated photodetectors and amplifiers. This has been achieved through a combination of numerical simulation and development of simple coupled-mode theories. Coupled-mode theory has been used to elucidate the physics underlying the operation of vertically integrated photodetectors. In particular, the relation between the spatial transients observed in experiments and numerical simulations, and the non-power orthogonality of the underlying modes has been clarified. The coupled-mode theory has been extended to the case of coupled waveguide-amplifiers.

Wright, E.M. [Univ. of Arizona, Tucson, AZ (United States). Optical Sciences Center

1993-11-01T23:59:59.000Z

132

Method of fabricating vertically aligned group III-V nanowires  

DOE Patents [OSTI]

A top-down method of fabricating vertically aligned Group III-V micro- and nanowires uses a two-step etch process that adds a selective anisotropic wet etch after an initial plasma etch to remove the dry etch damage while enabling micro/nanowires with straight and smooth faceted sidewalls and controllable diameters independent of pitch. The method enables the fabrication of nanowire lasers, LEDs, and solar cells.

Wang, George T; Li, Qiming

2014-11-25T23:59:59.000Z

133

Electrically injected visible vertical cavity surface emitting laser diodes  

DOE Patents [OSTI]

Visible laser light output from an electrically injected vertical cavity surface emitting laser (VSCEL) diode is enabled by the addition of phase-matching spacer layers on either side of the active region to form the optical cavity. The spacer layers comprise InAlP which act as charge carrier confinement means. Distributed Bragg reflector layers are formed on either side of the optical cavity to act as mirrors. 5 figs.

Schneider, R.P.; Lott, J.A.

1994-09-27T23:59:59.000Z

134

Procedures to predict vertical differential soil movement for expansive soils  

E-Print Network [OSTI]

OF TABLES Table Page 1. Soil profile considered in all sample calculations, 2. Gardner's coefficient. 3. Measured suction profile values. 4. Summary of vertical differential soil movements for Appendix C. . . . 50 . . . 54 70 . . . . 74 LIST... OF FIGURES Figure 1. United States map of expansive soils after Wiggins. 2. Center lift distortion mode Page 3. Edge lift distortion mode. 4. The structure of kaolinite (a) atomic structure (b) symbolic structure. . . 5. The structure of serpentine (a...

Naiser, Donald David

1997-01-01T23:59:59.000Z

135

Water coning calculations for vertical and horizontal wells  

E-Print Network [OSTI]

Breakthrough Time WOR after Breakthrough RATE SENSITIVITY 8 12 13 16 WATER CONING CALCULATIONS FOR HIGH MOBILITY RATIOS . . 19 Method of Developing Correlations Correlations for a Vertical Well Correlations for a Horizontal Well Discussion 19 26... APPENDIX E: BASE CASE AND SIMULATION RUNS FOR HORIZONTAL WELLS 98 APPENDIX F: TEST CASES AND RESULTS FOR HORIZONTAL WELLS 100 APPENDIX G: ADDINGTON'S METHOD APPENDIX H: CALCULATION OF HEIGHT h~ APPENDIX I: BASE CASE AND SIMULATION RUN SUMMARY...

Yang, Weiping

1990-01-01T23:59:59.000Z

136

DEVELOPMENT OF TECHNOLOGY TO REMOTELY NAVIGATE VERTICAL PIPE ARRAYS  

SciTech Connect (OSTI)

Situations exist around the Savannah River Site (SRS) and the Department of Energy (DOE) complex where it is advantageous to remotely navigate vertical pipe arrays. Specific examples are waste tanks in the SRS Tank Farms, which contain horizontal cooling coils at the tank bottom, vertical cooling coils throughout and a limited number of access points or ''risers''. These factors limit accessibility to many parts of these tanks by conventional means. Pipe Traveler technology has been developed to address these issues. The Pipe Traveler addresses these issues by using the vertical cooling coils as its medium of travel. The unit operates by grabbing a pipe using dual grippers located on either side of the equipment. Once securely attached to the pipe a drive wheel is extended to come in contact with the pipe. Rotation of the drive wheel causes the unit to rotate around the pipe. This action is continued until the second set of grippers is aligned with the next pipe. Extension pistons are actuated to extend the second set of grippers in contact with a second pipe. The second set of grippers is then actuated to grasp the pipe. The first set of grippers releases the original pipe and the process is repeated until the unit reaches its desired location. Once at the tool deployment location the desired tool may be used. The current design has proven the concept of pipe-to-pipe navigation. Testing of the Pipe Traveler has proven its ability to transfer itself from one pipe to another.

Krementz, D.; Immel, D.; Vrettos, N.; Nance, T.; Marzolf, A.

2011-07-01T23:59:59.000Z

137

Vertical feed stick wood fuel burning furnace system  

DOE Patents [OSTI]

A new and improved stove or furnace for efficient combustion of wood fuel including a vertical feed combustion chamber for receiving and supporting wood fuel in a vertical attitude or stack, a major upper portion of the combustion chamber column comprising a water jacket for coupling to a source of water or heat transfer fluid and for convection circulation of the fluid for confining the locus of wood fuel combustion to the bottom of the vertical gravity feed combustion chamber. A flue gas propagation delay channel extending from the laterally directed draft outlet affords delayed travel time in a high temperature environment to assure substantially complete combustion of the gaseous products of wood burning with forced air as an actively induced draft draws the fuel gas and air mixture laterally through the combustion and high temperature zone. Active sources of forced air and induced draft are included, multiple use and circuit couplings for the recovered heat, and construction features in the refractory material substructure and metal component superstructure.

Hill, Richard C. (Orono, ME)

1984-01-01T23:59:59.000Z

138

Low profile, high load vertical rolling positioning stage  

DOE Patents [OSTI]

A stage or support platform assembly for use in a synchrotron accurately positions equipment to be used in the beam line of the synchrotron. The support platform assembly includes an outer housing in which is disposed a lifting mechanism having a lifting platform or stage at its upper extremity on which the equipment is mounted. A worm gear assembly is located in the housing and is adapted to raise and lower a lifting shaft that is fixed to the lifting platform by an anti-binding connection. The lifting platform is moved vertically as the lifting shaft is moved vertically. The anti-binding connection prevents the shaft from rotating with respect to the platform, but does permit slight canting of the shaft with respect to the lifting platform so as to eliminate binding and wear due to possible tolerance mismatches. In order to ensure that the lifting mechanism does not move in a horizontal direction as it is moved vertically, at least three linear roller bearing assemblies are arranged around the outer-periphery of the lifting mechanism. One of the linear roller bearing assemblies can be adjusted so that the roller bearings apply a loading force against the lifting mechanism. Alternatively, a cam mechanism can be used to provide such a loading force.

Shu, Deming (Darien, IL); Barraza, Juan (Aurora, IL)

1996-01-01T23:59:59.000Z

139

Vertical Flow Dynamics in Kelp Forests: Implications for Nutrient Uptake, Condition and Survival  

E-Print Network [OSTI]

change and ENSO impacts on kelp forests. As yet, we areVertical Flow Dynamics in Kelp Forests: Implications forof ocean waves on giant kelp fronds results in the vertical

Edwards, Matthew S.

2008-01-01T23:59:59.000Z

140

E-Print Network 3.0 - addressable vertical-cavity laser Sample...  

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

vertical-cavity laser Search Powered by Explorit Topic List Advanced Search Sample search results for: addressable vertical-cavity laser Page: << < 1 2 3 4 5 > >> 1 J. Phys. III...

Note: This page contains sample records for the topic "vertical scales differ" 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

Potential impacts of vertical cable seismic: modeling, resolution and multiple attenuation  

E-Print Network [OSTI]

Vertical cable seismic methods are becoming more relevant as we require high quality and high resolution seismic data in both land and marine environments. Our goal in this thesis is to demonstrate the impacts of vertical cable surveying...

Wilson, Ryan Justin

2004-09-30T23:59:59.000Z

142

Potential vertical movement of large heat-generating waste packages in salt.  

SciTech Connect (OSTI)

With renewed interest in disposal of heat-generating waste in bedded or domal salt formations, scoping analyses were conducted to estimate rates of waste package vertical movement. Vertical movement is found to result from thermal expansion, from upward creep or heave of the near-field salt, and from downward buoyant forces on the waste package. A two-pronged analysis approach was used, with thermal-mechanical creep modeling, and coupled thermal-viscous flow modeling. The thermal-mechanical approach used well-studied salt constitutive models, while the thermal-viscous approach represented the salt as a highly viscous fluid. The Sierra suite of coupled simulation codes was used for both approaches. The waste package in all simulations was a right-circular cylinder with the density of steel, in horizontal orientation. A time-decaying heat generation function was used to represent commercial spent fuel with typical burnup and 50-year age. Results from the thermal-mechanical base case showed approximately 27 cm initial uplift of the package, followed by gradual relaxation closely following the calculated temperature history. A similar displacement history was obtained with the package density set equal to that of salt. The slight difference in these runs is attributable to buoyant displacement (sinking) and is on the order of 1 mm in 2,000 years. Without heat generation the displacement stabilizes at a fraction of millimeter after a few hundred years. Results from thermal-viscous model were similar, except that the rate of sinking was constant after cooldown, at approximately 0.15 mm per 1,000 yr. In summary, all calculations showed vertical movement on the order of 1 mm or less in 2,000 yr, including calculations using well-established constitutive models for temperature-dependent salt deformation. Based on this finding, displacement of waste packages in a salt repository is not a significant repository performance issue.

Clayton, Daniel James; Martinez, Mario J.; Hardin, Ernest L.

2013-05-01T23:59:59.000Z

143

Vertical-axis wind turbines -- The current status of an old technology  

SciTech Connect (OSTI)

Vertical-axis wind turbine technology is not well understood, even though the earliest wind machines rotated about a vertical axis. The operating environment of a vertical-axis wind turbine is quite complex, but detailed analysis capabilities have been developed and verified over the last 30 years. Although vertical-axis technology has not been widely commercialized, it exhibits both advantages and disadvantages compared to horizontal-axis technology, and in some applications, it appears to offer significant advantages.

Berg, D.E.

1996-12-31T23:59:59.000Z

144

Contornos Jurídicos e Matizes Econômicas dos Contratos de Integração Vertical Agroindustriais no Brasil  

E-Print Network [OSTI]

dados contratuais coletados, tornou-se possível uma reconstrução sistemática dos contratos de integração vertical com base

Paiva, Nunziata Stefania Valenza

2007-01-01T23:59:59.000Z

145

Effect of Dynamic Stall on the Aerodynamics of Vertical-Axis Wind Turbines  

E-Print Network [OSTI]

Effect of Dynamic Stall on the Aerodynamics of Vertical-Axis Wind Turbines Frank Scheurich of the aerodynamic performance of vertical-axis wind turbines pose a significant challenge for computational fluid of the aerodynamics of a vertical- axis wind turbine that consists of three curved rotor blades that are twisted

McCalley, James D.

146

Interface instabilities during displacements of two miscible fluids in a vertical pipe  

E-Print Network [OSTI]

Interface instabilities during displacements of two miscible fluids in a vertical pipe J. Scoffoni vertical displacement of one miscible fluid by another in a vertical pipe at sufficiently high velocities. INTRODUCTION The hydrodynamic stability of two-phase flow in pipes and channels has been the subject of many

Lajeunesse, Eric

147

Numerical study of natural convection in a vertical porous annulus with discrete heating  

E-Print Network [OSTI]

­10]. Among the finite enclosures, free convective heat transfer in a differentially heated vertical porous in a vertical annular enclosure for a wide range of radius and aspect ratios, and also used an approximateNumerical study of natural convection in a vertical porous annulus with discrete heating M. Sankar

Lopez, John M.

148

Experimental investigation of the performance of a diffuser-augmented vertical axis wind turbine  

E-Print Network [OSTI]

Experimental investigation of the performance of a diffuser- augmented vertical axis wind turbine Experimental investigation of the performance of a diffuser-augmented vertical axis wind turbine by Arash The performance of a vertical axis wind turbine with and without a diffuser was studied using direct force

Victoria, University of

149

Ris-R-Report Analysis of vertical wind direction and speed  

E-Print Network [OSTI]

Risø-R-Report Analysis of vertical wind direction and speed gradients for data from the met. mast Cariou, Rozenn Wagner, Julia Gottschall Title: Analysis of vertical wind direction and speed gradients.): The task of this project has been to study the vertical gradient of the wind direction from experimental

150

Water-Level Data Analysis for the Saturated Zone Site-Scale Flow and Transport Model  

SciTech Connect (OSTI)

This Analysis/Model Report (AMR) documents an updated analysis of water-level data performed to provide the saturated-zone, site-scale flow and transport model (CRWMS M&O 2000) with the configuration of the potentiometric surface, target water-level data, and hydraulic gradients for model calibration. The previous analysis was presented in ANL-NBS-HS-000034, Rev 00 ICN 01, Water-Level Data Analysis for the Saturated Zone Site-Scale Flow and Transport Model (USGS 2001). This analysis is designed to use updated water-level data as the basis for estimating water-level altitudes and the potentiometric surface in the SZ site-scale flow and transport model domain. The objectives of this revision are to develop computer files containing (1) water-level data within the model area (DTN: GS010908312332.002), (2) a table of known vertical head differences (DTN: GS0109083 12332.003), and (3) a potentiometric-surface map (DTN: GS010608312332.001) using an alternate concept from that presented in ANL-NBS-HS-000034, Rev 00 ICN 01 for the area north of Yucca Mountain. The updated water-level data include data obtained from the Nye County Early Warning Drilling Program (EWDP) and data from borehole USW WT-24. In addition to being utilized by the SZ site-scale flow and transport model, the water-level data and potentiometric-surface map contained within this report will be available to other government agencies and water users for ground-water management purposes. The potentiometric surface defines an upper boundary of the site-scale flow model, as well as provides information useful to estimation of the magnitude and direction of lateral ground-water flow within the flow system. Therefore, the analysis documented in this revision is important to SZ flow and transport calculations in support of total system performance assessment.

P. Tucci

2001-12-20T23:59:59.000Z

151

Simulation of winds as seen by a rotating vertical axis wind turbine blade  

SciTech Connect (OSTI)

The objective of this report is to provide turbulent wind analyses relevant to the design and testing of Vertical Axis Wind Turbines (VAWT). A technique was developed for utilizing high-speed turbulence wind data from a line of seven anemometers at a single level to simulate the wind seen by a rotating VAWT blade. Twelve data cases, representing a range of wind speeds and stability classes, were selected from the large volume of data available from the Clayton, New Mexico, Vertical Plane Array (VPA) project. Simulations were run of the rotationally sampled wind speed relative to the earth, as well as the tangential and radial wind speeds, which are relative to the rotating wind turbine blade. Spectral analysis is used to compare and assess wind simulations from the different wind regimes, as well as from alternate wind measurement techniques. The variance in the wind speed at frequencies at or above the blade rotation rate is computed for all cases, and is used to quantitatively compare the VAWT simulations with Horizontal Axis Wind Turbine (HAWT) simulations. Qualitative comparisons are also made with direct wind measurements from a VAWT blade.

George, R.L.

1984-02-01T23:59:59.000Z

152

VERTICAL RELAXATION OF A MOONLET PROPELLER IN SATURN'S A RING  

SciTech Connect (OSTI)

Two images, taken by the Cassini spacecraft near Saturn's equinox in 2009 August, show the Earhart propeller casting a 350 km long shadow, offering the opportunity to watch how the ring height, excited by the propeller moonlet, relaxes to an equilibrium state. From the shape of the shadow cast and a model of the azimuthal propeller height relaxation, we determine the exponential cooling constant of this process to be {lambda} = 0.07 {+-} 0.02 km{sup -1}, and thereby determine the collision frequency of the ring particles in the vertically excited region of the propeller to be {omega}{sub c}/{Omega} = 0.9 {+-} 0.2.

Hoffmann, H.; Seiss, M.; Spahn, F. [Institute of Physics and Astronomy, University of Potsdam, D-14476 Golm (Germany)

2013-03-01T23:59:59.000Z

153

Torque ripple in a Darrieus, vertical axis wind turbine  

SciTech Connect (OSTI)

Interaction between a steady wind and a rotating, Darrieus, vertical axis wind turbine produces time periodic aerodynamic loads which cause time dependent torque variations, referred to as torque ripple, to occur in the mechanical link between the turbine and the electrical generator. There is concern for the effect of torque ripple upon fatigue life of drive train components and upon power quality. An analytical solution characterizing the phenomenon of torque ripple has been obtained which is based upon a Fourier expansion of the time dependent features of the problem. Numerical results for torque ripple, some experimental data, determination of acceptable levels and methods of controlling it, are presented and discussed.

Reuter, R.C. Jr.

1980-09-01T23:59:59.000Z

154

Functionality Tuning in Vertically Aligned Nanocomposite Thin Films  

E-Print Network [OSTI]

Aligned Nanocolumnar TC Curie Temperature TEM Transmission Electron Microscopy TMI Metal-Insulator Transition Temperature TMR Tunnel Magnetoresistance PLD Pulsed Laser Deposition PLOAD Pulsed Laser Oblique-Angle Deposition VAN Vertically Aligned... structure. ................ 5 FIG. 1.2. (a) Electronic phase diagram of La1-xSrxMnO3 (Reproduced from Ref. 14). (b) TC versus tolerance factor t from equation (1-1) for the system A0.7A?0.3MnO3 (Reproduced from Ref. 15). 14, 15...

Chen, Aiping

2013-04-04T23:59:59.000Z

155

Vertical Velocities in Continental Boundary Layer Stratocumulus Clouds  

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 SecurityTensile Strain Switched Ferromagnetism inS-4500IIVasudha Patri MechanicalofVehicles -winsVenueVertical

156

Vertical Seismic Profiling (Majer, 2003) | Open Energy Information  

Open Energy Info (EERE)

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: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160 East 300 South Place: Salt Lake City, UtahResources/Full Version <VertexVertical

157

Category:Vertical Flowmeter Test | Open Energy Information  

Open Energy Info (EERE)

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: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin:Energy Information on PV Economics By Building Type Jump to:CategoryVertical

158

Scaling the Web Scaling Web Sites  

E-Print Network [OSTI]

Scaling the Web Scaling Web Sites Through Caching A large jump in a Web site's traffic may indi, pushing the site's through- put to its maximum point. When a Web site becomes overloaded, cus- tomers grow-generated revenue and may even tarnish the reputation of organizations relying on Web sites to support mission

Menascé, Daniel A.

159

The relationship between vertical teaming in science and student achievement as reported in the academic excellence indicator system (AEIS) at selected public schools in Bexar County, Texas  

E-Print Network [OSTI]

....................................................... 125 Recommendations for Further Study.............................................. 126 REFERENCES ....................................................................................................... 128 VITA... identify areas that need more emphasis in order for students to succeed. In vertical teaming, teachers from different grade levels articulate curriculum in a subject in order to think globally about the needs of all students and identify gaps or overlaps...

Arteaga, Veronica Hernandez

2008-10-10T23:59:59.000Z

160

DESCRIPTION OF THE THREEMILEROAD BRECCIA PIPE The breccia pipe is a 40-50 meter wide vertical pipe-shaped deposit that exhibits a sharp vertical contact  

E-Print Network [OSTI]

#12;DESCRIPTION OF THE THREEMILEROAD BRECCIA PIPE The breccia pipe is a 40-50 meter wide vertical pipe-shaped deposit that exhibits a sharp vertical contact with the host dolostoneand cuts all the stratigraphic levels exposed in the quarry (Fig. 2). The breccia pipe is located along a fracturezone that runs

Luczaj, John A.

Note: This page contains sample records for the topic "vertical scales differ" 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

Control system for a vertical-axis windmill  

DOE Patents [OSTI]

A vertical-axis windmill having a rotating structure is provided with a series of articulated vertical blades whose positions are controlled to maintain a constant RPM for the rotating structure, when wind speed is sufficient. A microprocessor controller is used to process information on wind speed, wind direction and RPM of the rotating structure to develop an electrical signal for establishing blade position. The preferred embodiment of the invention, when connected to a utility grid, is designed to generate 40 kilowatts of power when exposed to a 20 mile per hour wind. The control system for the windmill includes electrical blade actuators that modulate the blades of the rotating structure. Blade modulation controls the blade angle of attack, which in turn controls the RPM of the rotor. In the preferred embodiment, the microprocessor controller provides the operation logic and control functions. A wind speed sensor provides inputs to start or stop the windmill, and a wind direction sensor is used to keep the blade flip region at 90 and 270/sup 0/ to the wind. The control system is designed to maintain constant rotor RPM when wind speed is between 10 and 40 miles per hour.

Brulle, R.V.

1981-09-03T23:59:59.000Z

162

Vertical feed stick wood fuel burning furnace system  

DOE Patents [OSTI]

A stove or furnace for efficient combustion of wood fuel includes a vertical feed combustion chamber (15) for receiving and supporting wood fuel in a vertical attitude or stack. A major upper portion of the combustion chamber column comprises a water jacket (14) for coupling to a source of water or heat transfer fluid for convection circulation of the fluid. The locus (31) of wood fuel combustion is thereby confined to the refractory base of the combustion chamber. A flue gas propagation delay channel (34) extending laterally from the base of the chamber affords delayed travel time in a high temperature refractory environment sufficient to assure substantially complete combustion of the gaseous products of wood burning with forced air prior to extraction of heat in heat exchanger (16). Induced draft draws the fuel gas and air mixture laterally through the combustion chamber and refractory high temperature zone to the heat exchanger and flue. Also included are active sources of forced air and induced draft, multiple circuit couplings for the recovered heat, and construction features in the refractory material substructure and metal component superstructure.

Hill, Richard C. (Orono, ME)

1982-01-01T23:59:59.000Z

163

Electromagnetic confinement for vertical casting or containing molten metal  

DOE Patents [OSTI]

An apparatus and method adapted to confine a molten metal to a region by means of an alternating electromagnetic field. As adapted for use in the present invention, the alternating electromagnetic field given by B.sub.y =(2.mu..sub.o .rho.gy).sup.1/2 (where B.sub.y is the vertical component of the magnetic field generated by the magnet at the boundary of the region; y is the distance measured downward form the top of the region, .rho. is the metal density, g is the acceleration of gravity and .mu..sub.o is the permeability of free space) induces eddy currents in the molten metal which interact with the magnetic field to retain the molten metal with a vertical boudnary. As applied to an apparatus for the continuous casting of metal sheets or rods, metal in liquid form can be continuously introduced into the region defined by the magnetic field, solidified and conveyed away from the magnetic field in solid form in a continuous process.

Lari, Robert J. (Aurora, IL); Praeg, Walter F. (Palos Park, IL); Turner, Larry R. (Naperville, IL)

1991-01-01T23:59:59.000Z

164

Meso-scale machining capabilities and issues  

SciTech Connect (OSTI)

Meso-scale manufacturing processes are bridging the gap between silicon-based MEMS processes and conventional miniature machining. These processes can fabricate two and three-dimensional parts having micron size features in traditional materials such as stainless steels, rare earth magnets, ceramics, and glass. Meso-scale processes that are currently available include, focused ion beam sputtering, micro-milling, micro-turning, excimer laser ablation, femto-second laser ablation, and micro electro discharge machining. These meso-scale processes employ subtractive machining technologies (i.e., material removal), unlike LIGA, which is an additive meso-scale process. Meso-scale processes have different material capabilities and machining performance specifications. Machining performance specifications of interest include minimum feature size, feature tolerance, feature location accuracy, surface finish, and material removal rate. Sandia National Laboratories is developing meso-scale electro-mechanical components, which require meso-scale parts that move relative to one another. The meso-scale parts fabricated by subtractive meso-scale manufacturing processes have unique tribology issues because of the variety of materials and the surface conditions produced by the different meso-scale manufacturing processes.

BENAVIDES,GILBERT L.; ADAMS,DAVID P.; YANG,PIN

2000-05-15T23:59:59.000Z

165

Stable polarization self-modulation in vertical-cavity surface-emitting lasers  

SciTech Connect (OSTI)

The characteristics of polarization self-modulation in a vertical-cavity surface-emitting laser (VCSEL) were studied for frequencies up to {approx}9 GHz both experimentally and theoretically. Polarization self-modulation was obtained by rotating the linearly polarized output of the VCSEL by 90{degree} and reinjecting it into the laser. Experimentally we simultaneously recorded time traces, optical and radio-frequency spectra. We found for increasing modulation frequencies that the output characteristics changed from square-wave to sinusoidal and the VCSEL system assumed new polarization eigenstates that are different from the free-running VCSEL eigenstates. We modeled polarization self-modulation as an interband process and found a good qualitative agreement between our experimental and numerical results. {copyright} {ital 1998 American Institute of Physics.}

Li, H.; Hohl, A.; Gavrielides, A. [Air Force Research Laboratory DELO, Nonlinear Optics Group, Phillips Research Site, 3550 Aberdeen Avenue, Kirtland Air Force Base, New Mexico 87117-5776 (United States)] [Air Force Research Laboratory DELO, Nonlinear Optics Group, Phillips Research Site, 3550 Aberdeen Avenue, Kirtland Air Force Base, New Mexico 87117-5776 (United States); Hou, H.; Choquette, K.D. [Center of Compound Semiconductor Science and Technology, Sandia National Laboratories MS0603, Albuquerque, New Mexico 87185-1603 (United States)] [Center of Compound Semiconductor Science and Technology, Sandia National Laboratories MS0603, Albuquerque, New Mexico 87185-1603 (United States)

1998-05-01T23:59:59.000Z

166

Validation of the Electrical Properties of the ITER ICRF Antenna using Reduced-Scale Mock-Ups  

SciTech Connect (OSTI)

Experimental measurements on reduced-scale mock-ups allow validating the electrical properties and RF numerical optimization of the ITER ICRF antenna. Frequency response in the different regions of the antenna is described and key parameters for performance improvement are given. Coupling is improved by acting on the front-face geometry (strap width, antenna box depth and vertical septa recess). The 4-port junction acts as a frequency filter and together with the service stub performs pre-matching in the whole frequency band. Influence of the Faraday screen on coupling is limited. The effect of voltage limitation on the maximum total radiated power is given. The importance of a good decoupling network and of grounding is emphasized. Finally the control of the antenna wave spectrum is performed by implementing feedback controlled load-resilient matching and decoupling options and control algorithms are tested.

Dumortier, Pierre; Durodie, Frederic; Grine, Djamel; Kyrytsya, Volodymyr; Louche, Fabrice; Messiaen, Andre; Vervier, Michel; Vrancken, Mark [LPP-ERM/KMS, EURATOM-Belgian State Association, CYCLE, Trilateral Euregio Cluster, B-1000 Brussels (Belgium)

2011-12-23T23:59:59.000Z

167

Vertically aligned crystalline silicon nanowires with controlled diameters for energy conversion applications: Experimental and theoretical insights  

SciTech Connect (OSTI)

Vertically orientated single crystalline silicon nanowire (SiNW) arrays with controlled diameters are fabricated via a metal-assisted chemical etching method. The diameter of the fabricated nanowires is controlled by simply varying the etching time in HF/H{sub 2}O{sub 2} electrolytes. The fabricated SiNWs have diameters ranging from 117 to 650?nm and lengths from 8 to 18??m. The optical measurements showed a significant difference in the reflectance/absorption of the SiNWs with different diameters, where the reflectance increases with increasing the diameter of the SiNWs. The SiNWs showed significant photoluminescence (PL) emission spectra with peaks lying between 380 and 670?nm. The PL intensity increases as the diameter increases and shows red shift for peaks at ?670?nm. The increase or decrease of reflectivity is coincident with PL intensity at wavelength ?660?nm. The x-ray diffraction patterns confirm the high crystallinity of the fabricated SiNWs. In addition, the Raman spectra showed a shift in the first order transverse band toward lower frequencies compared to that usually seen for c-Si. Finite difference time domain simulations have been performed to confirm the effect of change of diameter on the optical properties of the nanowires. The simulation results showed good agreement with the experimental results for the SiNWs of different diameters.

Razek, Sara Abdel; Swillam, Mohamed A.; Allam, Nageh K., E-mail: nageh.allam@aucegypt.edu [Department of Physics, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835 (Egypt)

2014-05-21T23:59:59.000Z

168

A Study Of Scale Deposition- An Analogue Of Meso- To Epithermal...  

Open Energy Info (EERE)

scale deposition were measured during different test times and analyses made on the chemistry and mineralogy of scales from the Milos plant; the results indicate that the rates...

169

Semicoke production and quality at Chinese vertical SJ furnaces  

SciTech Connect (OSTI)

In Russia there has been little interest on the thermal processing of non-sintering coal. However it may be used to obtain many special types of coke and semicoke that are necessary for processes other than blast furnace smelting and employing small metallurgical coke fractions that do not meet the relevant quality requirements. China has recently made great progress in developing the thermal processing of coal (mainly energy coal) to obtain a highly effective product, semicoke, primarily used in metallurgy and adsorption process. The article considers the operation of a Chinese semicoking plant equipped with vertical SJ furnaces. The plant is in the Shenmu district of Shanxi province (Inner Mongolia). The enterprise includes two furnaces of total output of about 100,000 t/yr of semicoke.

V.M. Strakhov; I.V. Surovtseva; A.V. D'yachenko; V.M. Men'shenin [Kuznetsk Center, Eastern Coal-Chemistry Institute (Russian Federation)

2007-05-15T23:59:59.000Z

170

Test reports for K Basins vertical fuel handling tools  

SciTech Connect (OSTI)

The vertical fuel handling tools, for moving N Reactor fuel elements, were tested in the 305 Building Cold Test Facility (CTF) in the 300 Area. After fabrication was complete, the tools were functionally tested in the CTF using simulated N Reactor fuel rods (inner and outer elements). The tools were successful in picking up the simulated N Reactor fuel rods. These tools were also load tested using a 62 pound dummy to test the structural integrity of each assembly. The tools passed each of these tests, based on the performance objectives. Finally, the tools were subjected to an operations acceptance test where K Basins Operations personnel operated the tool to determine its durability and usefulness. Operations personnel were satisfied with the tools. Identified open items included the absence of a float during testing, and documentation required prior to actual use of the tools in the 100 K fuel storage basin.

Meling, T.A.

1995-02-01T23:59:59.000Z

171

High efficacy plasma display panel with vertically raised bus electrodes  

SciTech Connect (OSTI)

The authors propose a high efficacy alternating current plasma display panel utilizing vertically raised multilayer bus electrodes. The cell structure was designed to provide an opposite discharge mode and low discharge current in a relatively long gap. The test panels having discharge gaps of 330, 350, and 370 {mu}m were fabricated and basic properties of the panel were investigated in terms of current-voltage characteristics, luminance, and luminous efficiency. The cells with proposed structure show higher luminance and lower current simultaneously. The improvement in luminous efficiency is found to be a factor of 2 compared with the conventional coplanar structure having an electrode gap of 60 {mu}m. Emission spectra and spatio-temporal distribution of infrared light in discharge were measured. It is shown that high luminous efficiency of proposed cell originates from high excitation efficiency, low surface loss of charged particles, and enlarged discharge volume.

Ok, Jung-Woo; Lee, Hae June; Kim, Dong-Hyun; Park, Chung-Hoo; Lee, Ho-Jun; Kim, Jae-Sung; Choi, Kwang-Yeol [Department of Electrical Engineering, Pusan National University, Geumjeong-gu, Busan 609-735 (Korea, Republic of); PDP R and D Department, PDP Division, LG Electronics Inc., Gumi 730-030 (Korea, Republic of); Digital Display Research Laboratory, LG Electronics Inc., Seoul 137-724 (Korea, Republic of)

2006-10-30T23:59:59.000Z

172

Parity-violating vertices for spin-3 gauge fields  

SciTech Connect (OSTI)

The problem of constructing consistent parity-violating interactions for spin-3 gauge fields is considered in Minkowski space. Under the assumptions of locality, Poincare invariance, and parity noninvariance, we classify all the nontrivial perturbative deformations of the Abelian gauge algebra. In space-time dimensions n=3 and n=5, deformations of the free theory are obtained which make the gauge algebra non-Abelian and give rise to nontrivial cubic vertices in the Lagrangian, at first order in the deformation parameter g. At second order in g, consistency conditions are obtained which the five-dimensional vertex obeys, but which rule out the n=3 candidate. Moreover, in the five-dimensional first-order deformation case, the gauge transformations are modified by a new term which involves the second de Wit-Freedman connection in a simple and suggestive way.

Boulanger, Nicolas; Leclercq, Serge; Cnockaert, Sandrine [Universite de Mons-Hainaut, Academie Wallonie-Bruxelles, Mecanique et Gravitation, Avenue du Champ de Mars 6, B-7000 Mons (Belgium); Physique Theorique et Mathematique, Universite Libre de Bruxelles and International Solvay Institutes, U.L.B. Campus Plaine, C.P. 231, B-1050, Brussels (Belgium)

2006-03-15T23:59:59.000Z

173

Non-linear numerical simulations of magneto-acoustic wave propagation in small-scale flux tubes  

E-Print Network [OSTI]

We present results of non-linear, 2D, numerical simulations of magneto-acoustic wave propagation in the photosphere and chromosphere of small-scale flux tubes with internal structure. Waves with realistic periods of three to five minutes are studied, after applying horizontal and vertical oscillatory perturbations to the equilibrium model. Spurious reflections of shock waves from the upper boundary are minimized thanks to a special boundary condition. This has allowed us to increase the duration of the simulations and to make it long enough to perform a statistical analysis of oscillations. The simulations show that deep horizontal motions of the flux tube generate a slow (magnetic) mode and a surface mode. These modes are efficiently transformed into a slow (acoustic) mode in the vA propagates vertically along the field lines, forms shocks and remains always within the flux tube. It might deposit effectively the energy of the driver into the chromosphere. When the driver oscillates with a high frequency, above the cut-off, non-linear wave propagation occurs with the same dominant driver period at all heights. At low frequencies, below the cut-off, the dominant period of oscillations changes with height from that of the driver in the photosphere to its first harmonic (half period) in the chromosphere. Depending on the period and on the type of the driver, different shock patterns are observed.

E. Khomenko; M. Collados; T. Felipe

2008-01-25T23:59:59.000Z

174

GFE Signature GFE signature is a multi-scale description of the  

E-Print Network [OSTI]

problem in computer graphics. Widely studied methods for this family of problems include the Gromov for corresponding points. Methodology The proposed method seeks to establish correspondence between surface features-invariant valuation of surface vertices, but this valuation must be generalized to achieve scale and rotation

Bhandarkar, Suchendra "Suchi" M.

175

Integration of photoactive and electroactive components with vertical cavity surface emitting lasers  

DOE Patents [OSTI]

A monolithically integrated optoelectronic device is provided which integrates a vertical cavity surface emitting laser and either a photosensitive or an electrosensitive device either as input or output to the vertical cavity surface emitting laser either in parallel or series connection. Both vertical and side-by-side arrangements are disclosed, and optical and electronic feedback means are provided. Arrays of these devices can be configured to enable optical computing and neural network applications. 9 figs.

Bryan, R.P.; Esherick, P.; Jewell, J.L.; Lear, K.L.; Olbright, G.R.

1997-04-29T23:59:59.000Z

176

Integration of photoactive and electroactive components with vertical cavity surface emitting lasers  

DOE Patents [OSTI]

A monolithically integrated optoelectronic device is provided which integrates a vertical cavity surface emitting laser and either a photosensitive or an electrosensitive device either as input or output to the vertical cavity surface emitting laser either in parallel or series connection. Both vertical and side-by-side arrangements are disclosed, and optical and electronic feedback means are provided. Arrays of these devices can be configured to enable optical computing and neural network applications.

Bryan, Robert P. (12700 Indian School Rd. NE., Apt. 604, Albuquerque, NM 87112); Esherick, Peter (1105 Sagebrush Trail SE., Albuquerque, NM 87123); Jewell, Jack L. (12 Timberline Dr., Bridgewater, NJ 08807); Lear, Kevin L. (13713 Vic Rd. NE., Albuquerque, NM 87112); Olbright, Gregory R. (3875 Orange Ct., Boulder, CO 80304)

1997-01-01T23:59:59.000Z

177

Integrated Lithium-Ion Battery Model Encompassing Multi-Physics in Varied Scales: An Integrated Computer Simulation Tool for Design and Development of EDV Batteries (Presentation)  

SciTech Connect (OSTI)

This presentation discusses the physics of lithium-ion battery systems in different length scales, from atomic scale to system scale.

Kim, G. H.; Smith, K.; Lee, K. J.; Santhanagopalan, S.; Pesaran, A.

2011-01-01T23:59:59.000Z

178

E-Print Network 3.0 - anti-rolling active vertical Sample Search...  

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

Nodes Coupled Degrees of Freedom Local Coordinate System... serve to reinforce this load-bearing area. The upper spring perch allows for vertical adjustment... in all three...

179

E-Print Network 3.0 - accounting standards-the vertical Sample...  

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

Mathematics 39 Perception, 1998, volume 27, pages 1287-1304 Temporal aspects of slant and inclination perception Summary: transformations) of either horizontal or vertical...

180

Vertical Integration in Gasoline Supply: An Empirical Test of Raising Rivals' Costs  

E-Print Network [OSTI]

Vertical Integration in Gasoline Supply: An Empirical Testfor the reÞning and distribution of gasoline and the whole-sale price of unbranded gasoline sold to independent

Gilbert, Richard; Hastings, Justine

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Vertical Integration in Gasoline Supply: An Empirical Test of Raising Rivals' Costs  

E-Print Network [OSTI]

Vertical Integration in Gasoline Supply: An Empirical Testoligopoly, market power, gasoline Abstract: This paperand distribution of gasoline and the wholesale price of

Gilbert, Richard; Hastings, Justine

2001-01-01T23:59:59.000Z

182

Water-Level Data Analysis for the Saturated Zone Site-Scale Flow and Transport Model  

SciTech Connect (OSTI)

This report is an updated analysis of water-level data performed to provide the ''Saturated Zone Site-Scale Flow Model'' (BSC 2004 [DIRS 170037]) (referred to as the saturated zone (SZ) site-scale flow model or site-scale SZ flow model in this report) with the configuration of the potentiometric surface, target water-level data, and hydraulic gradients for calibration of groundwater flow models. This report also contains an expanded discussion of uncertainty in the potentiometric-surface map. The analysis of the potentiometric data presented in Revision 00 of this report (USGS 2001 [DIRS 154625]) provides the configuration of the potentiometric surface, target heads, and hydraulic gradients for the calibration of the SZ site-scale flow model (BSC 2004 [DIRS 170037]). Revision 01 of this report (USGS 2004 [DIRS 168473]) used updated water-level data for selected wells through the year 2000 as the basis for estimating water-level altitudes and the potentiometric surface in the SZ site-scale flow and transport model domain based on an alternative interpretation of perched water conditions. That revision developed computer files containing: Water-level data within the model area (DTN: GS010908312332.002); A table of known vertical head differences (DTN: GS010908312332.003); and A potentiometric-surface map (DTN: GS010608312332.001) using an alternative concept from that presented by USGS (2001 [DIRS 154625]) for the area north of Yucca Mountain. The updated water-level data presented in USGS (2004 [DIRS 168473]) include data obtained from the Nye County Early Warning Drilling Program (EWDP) Phases I and II and data from Borehole USW WT-24. This document is based on Revision 01 (USGS 2004 [DIRS 168473]) and expands the discussion of uncertainty in the potentiometric-surface map. This uncertainty assessment includes an analysis of the impact of more recent water-level data and the impact of adding data from the EWDP Phases III and IV wells. In addition to being utilized by the SZ site-scale flow model, the water-level data and potentiometric-surface map contained within this report will be available to other government agencies and water users for groundwater management purposes. The potentiometric surface defines an upper boundary of the site-scale flow model and provides information useful to estimation of the magnitude and direction of lateral groundwater flow within the flow system. Therefore, the analysis documented in this revision is important to SZ flow and transport calculations in support of total system performance assessment (TSPA).

K. Rehfeldt

2004-10-08T23:59:59.000Z

183

Order-of-magnitude enhancement of wind farm power density via counter-rotating vertical-axis wind turbine arrays  

E-Print Network [OSTI]

Modern wind farms require significant land resources to separate each wind turbine from the adjacent turbine wakes. These aerodynamic constraints limit the amount of power that can be extracted from a given wind farm footprint. We conducted full-scale field tests of vertical-axis wind turbines in counter-rotating configurations under natural wind conditions. Whereas wind farms consisting of propeller-style turbines produce 2 to 3 watts of power per square meter of land area, these field tests indicate that power densities approaching 100 W m^-2 can be achieved by arranging vertical-axis wind turbines in layouts that enable them to extract energy from adjacent wakes. In addition, we calculated that the global wind resource available to 10-m tall turbines based on the present approach is approximately 225 trillion watts (TW), which significantly exceeds the global wind resource available to 80-m tall, propeller-style wind turbines, approximately 75 TW. This improvement is due to the closer spacing that can be a...

Dabiri, John O

2010-01-01T23:59:59.000Z

184

Assessment of CCFL model of RELAP5/MOD3 against simple vertical tubes and rod bundle tests. International Agreement Report  

SciTech Connect (OSTI)

The CCFL model used in RELAP5/MOD3 version 5m5 has been assessed against simple vertical tubes and bundle tests performed at a facility of Korea Atomic Energy Research Institute. The effect of changes in tube diameter and nodalization of tube section were investigated. The roles of interfacial drags on the flooding characteristics are discussed. Differences between the calculation and the experiment are also discussed. A comparison between model assessment results and the test data showed that the calculated value lay well on the experimental flooding curve specified by user, but the pressure jump before onset of flooding was not calculated.

Cho, S.; Arne, N. [Korea Electric Power Corp., Taejon (KR). Research Center; Chung, B.D.; Kim, H.J. [Korea Inst. of Nuclear Safety, Taejon (KR)

1993-06-01T23:59:59.000Z

185

Identifying Product Scaling Principles  

E-Print Network [OSTI]

shows how laws of similarity were determined for wind turbine rotors in order for ease of optimization when scaling to the desired level (Peterson, 1984). The study depicts how certain scaling laws for varying changes such as rotational speed, radius... and scale the physical shape and features of the fin in order to produce wind turbine blades for producing electricity. A similar study takes the fins propulsion motion and converts it into a mechanical system for swimming robots and submarines...

Perez, Angel 1986-

2011-06-02T23:59:59.000Z

186

Thermodynamics and scale relativity  

E-Print Network [OSTI]

It is shown how the fractal paths of scale relativity (following Nottale) can be introduced into a thermodynamical context (following Asadov-Kechkin).

Robert Carroll

2011-10-13T23:59:59.000Z

187

Silica Scaling Removal Process  

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

systems Water treatment systems Water evaporation systems Potential mining applications (produced water) Industry applications for which silica scaling must be prevented Benefits:...

188

Effects of Atomic Scale Roughness at Metal/insulator Interfaces...  

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

Work Function. Effects of Atomic Scale Roughness at Metalinsulator Interfaces on Metal Work Function. Abstract: We evaluate the performance of different van der Waals (vdW)...

189

Visible light emitting vertical cavity surface emitting lasers  

DOE Patents [OSTI]

A vertical cavity surface emitting laser that emits visible radiation is built upon a substrate, then having mirrors, the first mirror on top of the substrate; both sets of mirrors being a distributed Bragg reflector of either dielectrics or other materials which affect the resistivity or of semiconductors, such that the structure within the mirror comprises a plurality of sets, each having a thickness of .lambda./2n where n is the index of refraction of each of the sets; each of the mirrors adjacent to spacers which are on either side of an optically active bulk or quantum well layer; and the spacers and the optically active layer are from one of the following material systems: In.sub.z (Al.sub.y Ga.sub.1-y).sub.1-z P, InAlGaAs, AlGaAs, InGaAs, or AlGaP/GaP, wherein the optically active region having a length equal to m .lambda./2n.sub.eff where m is an integer and n.sub.eff is the effective index of refraction of the laser cavity, and the spacer layer and one of the mirrors being transmissive to radiation having a wavelength of .lambda./n, typically within the green to red portion of the visible spectrum.

Bryan, Robert P. (Boulder, CO); Olbright, Gregory R. (Boulder, CO); Lott, James A. (Albuquerque, NM); Schneider, Jr., Richard P. (Albuquerque, NM)

1995-01-01T23:59:59.000Z

190

Intermittent dry granular flow in a vertical pipe  

E-Print Network [OSTI]

The intermittent compact flow of glass beads in a vertical glass pipe of small diameter is studied experimentally by combining particle fraction, pressure, and air and grain flow rates measurements with a spatio-temporal analysis of the flow. At the onset of the flow, a decompaction front is observed to propagate from the bottom to the top of the tube at a velocity much larger than that of the grains. The blockage front also propagates upwards and at a still higher velocity. The decompaction induces a decreasing pressure wave strongly amplified as it propagates upwards towards the top of the tube. Pressure variations of 3000 Pa or more are detected in this region while particle fraction variations are of the order of 0.02. Grain velocities during the flow period also increase strongly at the top of the tube while the corresponding fraction of total time decreases. A 1D numerical model based on a simple relation between the effective acceleration of the grains and the particle fraction variations reproduces the amplification effect and provides predictions for its dependence on the permeability of the packing.

Yann Bertho; Frederique Giorgiutti-Dauphine; Jean-Pierre Hulin

2005-08-12T23:59:59.000Z

191

Methods and apparatus for vertical coupling from dielectric waveguides  

SciTech Connect (OSTI)

A frequency-chirped nano-antenna provides efficient sub-wavelength vertical emission from a dielectric waveguide. In one example, this nano-antenna includes a set of plasmonic dipoles on the opposite side of a SiYV.sub.4 waveguide from a ground plane. The resulting structure, which is less than half a wavelength long, emits a broadband beam (e.g., >300 nm) that can be coupled into an optical fiber. In some embodiments, a diffractive optical element with unevenly shaped regions of high- and low-index dielectric material collimates the broadband beam for higher coupling efficiency. In some cases, a negative lens element between the nano-antenna and the diffractive optical element accelerates the emitted beam's divergence (and improves coupling efficiency), allowing for more compact packaging. Like the diffractive optical element, the negative lens element includes unevenly shaped regions of high- and low-index dielectric material that can be designed to compensate for aberrations in the beam emitted by the nano-antenna.

Yaacobi, Ami; Cordova, Brad Gilbert

2014-06-17T23:59:59.000Z

192

Droplet sizes, dynamics and deposition in vertical annular flow  

SciTech Connect (OSTI)

The role of droplets in vertical upwards annular flow is investigated, focusing on the droplet size distributions, dynamics, and deposition phenomena. An experimental program was performed based on a new laser optical technique developed in these laboratories and implemented here for annular flow. This permitted the simultaneous measurement of droplet size, axial and radial velocity. The dependence of droplet size distributions on flow conditions is analyzed. The Upper-Log Normal function proves to be a good model for the size distribution. The mechanism controlling the maximum stable drop size was found to result from the interaction of the pressure fluctuations of the turbulent flow of the gas core with the droplet. The average axial droplet velocity showed a weak dependence on gas rates. This can be explained once the droplet size distribution and droplet size-velocity relationship are analyzed simultaneously. The surprising result from the droplet conditional analysis is that larger droplet travel faster than smaller ones. This dependence cannot be explained if the drag curves used do not take into account the high levels of turbulence present in the gas core in annular flow. If these are considered, then interesting new situations of multiplicity and stability of droplet terminal velocities are encountered. Also, the observed size-velocity relationship can be explained. A droplet deposition is formulated based on the particle inertia control. This permitted the calculation of rates of drop deposition directly from the droplet size and velocities data.

Lopes, J C.B.; Dukler, A E

1985-10-01T23:59:59.000Z

193

Tunable capillary-induced attraction between vertical cylinders  

E-Print Network [OSTI]

Deformation of a fluid interface caused by the presence of objects at the interface can lead to large lateral forces between the objects. We explore these fluid-mediated attractive force between partially submerged vertical cylinders. Forces are experimentally measured by slowly separating cylinder pairs and cylinder triplets after capillary rise is initially established for cylinders in contact. For cylinder pairs, numerical computations and a theoretical model are found to be in good agreement with measurements. The model provides insight into the relative importance of the contributions to the total force. For small separations, the pressure term dominates, while at large separations, surface tension becomes more important. A cross-over between the two regimes occurs at a separation of around half of a capillary length. The experimentally measured forces between cylinder triplets are also in good agreement with numerical computations, and we show that pair-wise contributions account for nearly all of the attractive force between triplets. For cylinders with equilibrium capillary rise height greater than the height of the cylinder, we find that the attractive force depends on the height of the cylinders above the submersion level, which provides a means to create precisely-controlled tunable cohesive forces between objects deforming a fluid interface.

Jennifer M. Rieser; P. E. Arratia; A. G. Yodh; J. P. Gollub; D. J. Durian

2014-12-02T23:59:59.000Z

194

Visible light emitting vertical cavity surface emitting lasers  

DOE Patents [OSTI]

A vertical cavity surface emitting laser that emits visible radiation is built upon a substrate, then having mirrors, the first mirror on top of the substrate; both sets of mirrors being a distributed Bragg reflector of either dielectrics or other materials which affect the resistivity or of semiconductors, such that the structure within the mirror comprises a plurality of sets, each having a thickness of {lambda}/2n where n is the index of refraction of each of the sets; each of the mirrors adjacent to spacers which are on either side of an optically active bulk or quantum well layer; and the spacers and the optically active layer are from one of the following material systems: In{sub z}(Al{sub y}Ga{sub 1{minus}y}){sub 1{minus}z}P, InAlGaAs, AlGaAs, InGaAs, or AlGaP/GaP, wherein the optically active region having a length equal to m {lambda}/2n{sub eff} where m is an integer and n{sub eff} is the effective index of refraction of the laser cavity, and the spacer layer and one of the mirrors being transmissive to radiation having a wavelength of {lambda}/n, typically within the green to red portion of the visible spectrum. 10 figs.

Bryan, R.P.; Olbright, G.R.; Lott, J.A.; Schneider, R.P. Jr.

1995-06-27T23:59:59.000Z

195

Advance in Vertical Buffered Electropolishing on Niobium for Particle Accelerators*  

SciTech Connect (OSTI)

Niobium (Nb) is the most popular material that has been employed for making superconducting radio frequency (SRF) cavities to be used in various particle accelerators over the last couple of decades. One of the most important steps in fabricating Nb SRF cavities is the final chemical removal of 150 {mu}m of Nb from the inner surfaces of the SRF cavities. This is usually done by either buffered chemical polishing (BCP) or electropolishing (EP). Recently a new Nb surface treatment technique called buffered electropolishing (BEP) has been developed at Jefferson Lab. It has been demonstrated that BEP can produce the smoothest surface finish on Nb ever reported in the literature while realizing a Nb removal rate as high as 10 {mu}m/min that is more than 25 and 5 times quicker than those of EP and BCP(112) respectively. In this contribution, recent advance in optimizing and understanding BEP treatment technique is reviewed. Latest results from RF measurements on BEP treated Nb single cell cavities by our unique vertical polishing system will be reported.

A.T. Wu, S. Jin, J.D. Mammosser, C.E. Reece, R.A. Rimmer,L. Lin, X.Y. Lu, K. Zhao

2011-09-01T23:59:59.000Z

196

ABUNDANCE AND VERTICAL DISTRIBUTION OF FISHES IN A COBBLE-BOTTOM KELP FOREST OFF  

E-Print Network [OSTI]

ABUNDANCE AND VERTICAL DISTRIBUTION OF FISHES IN A COBBLE-BOTTOM KELP FOREST OFF SAN ONOFRE composition,vertical distribution,and standingstockoffishes ina forest of giant kelp and a nearby kelp substrates, were rare or absent in these low-relief, cobble- bottom habitats. The species present in the kelp

197

Characterizing hydraulic properties of filter material of a Vertical Flow1 Constructed Wetland2  

E-Print Network [OSTI]

Characterizing hydraulic properties of filter material of a Vertical Flow1 Constructed Wetland2 A Characterizing the hydraulic properties of filter material used in a vertical flow11 constructed wetland (VFCW of porous mineral material and13 organic matter that makes hydraulic characterization a difficult task. Here

Paris-Sud XI, Université de

198

All-Fiber Pulsed Lasers Passively Mode-Locked by Transferable Vertically Aligned Carbon Nanotube Film  

E-Print Network [OSTI]

All-Fiber Pulsed Lasers Passively Mode-Locked by Transferable Vertically Aligned Carbon Nanotube of Tokyo, Tokyo 113-8656, Japan An all-fiber passive laser mode locking is realized with a vertically aligned single-walled carbon nanotube film that can be transferred onto an arbitrary substrate using only

Maruyama, Shigeo

199

Mode-locked fiber lasers using vertically aligned carbon nanotubes directly synthesized onto substrates  

E-Print Network [OSTI]

Mode-locked fiber lasers using vertically aligned carbon nanotubes directly synthesized onto novel passively mode-locked fiber lasers using vertically aligned carbon nanotubes synthesized using.4890) Organic materials 1. Introduction Passively mode-locked fiber lasers have been used in many applications

Maruyama, Shigeo

200

WIND-TUNNEL STUDY ON AERODYNAMIC PERFORMANCE OF SMALL VERTICAL-AXIS WIND TURBINES  

E-Print Network [OSTI]

1 WIND-TUNNEL STUDY ON AERODYNAMIC PERFORMANCE OF SMALL VERTICAL-AXIS WIND TURBINES J. J. Miau*1 were carried out to study the aerodynamic performance of three vertical axis wind turbines (VAWTs. On the other hand, the characteristics of unsteady flow around the helical wind turbine were studied with a hot

Leu, Tzong-Shyng "Jeremy"

Note: This page contains sample records for the topic "vertical scales differ" 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

CLIMATOLOGY OF VERTICAL AIR MOTION DURING RAINFALL IN NIAMEY, NIGER AND BLACK FOREST, GERMANY USING AN  

E-Print Network [OSTI]

CLIMATOLOGY OF VERTICAL AIR MOTION DURING RAINFALL IN NIAMEY, NIGER AND BLACK FOREST, GERMANY USING in Niamey, Niger and eight months in Germany's Black Forest. The AMF includes a vertically pointing 95 GHz of the orographically influenced precipitation in Germany's mountains. __________ NOTICE: This manuscript has been

202

4/3 law of Granular Particles Flowing through a Vertical Pipe  

E-Print Network [OSTI]

4/3 law of Granular Particles Flowing through a Vertical Pipe Osamu Moriyama, Naoya Kuroiwa­01, Japan (Received June 16, 1997) Density waves of granular material (sand) flowing through a vertical pipe have been investigated. Clear density waves emerge when the cock attached to bottom end of the pipe

Hayakawa, Hisao

203

Evaluation of a Pump and Reeled Hose System for Studying the Vertical  

E-Print Network [OSTI]

545 Evaluation of a Pump and Reeled Hose System for Studying the Vertical Distribution of Small Evaluation of a Pump and Reeled Hose System for Studying the Vertical Distribution of Small Plankton Advantages and limitations of a pump and reeled hose system 8 Literature cited 9 #12;#12;Evaluation of a Pump

204

"Enhanced Field Emission from Vertically Oriented Graphene by Thin Solid Film Coatings"  

E-Print Network [OSTI]

"Enhanced Field Emission from Vertically Oriented Graphene by Thin Solid Film Coatings" MICHAEL films such as nanotubes, nanohorns, and graphene due to their favorable field emission properties, we have developed field emission arrays of vertically oriented graphene (carbon nanosheets) that have

Shaw, Leah B.

205

How Does the Eye Warm? Part II: Sensitivity to Vertical Wind Shear and a Trajectory Analysis  

E-Print Network [OSTI]

How Does the Eye Warm? Part II: Sensitivity to Vertical Wind Shear and a Trajectory Analysis DANIEL of vertical wind shear on the structure of warming and descent in the eye; results are compared with the no environment, time-averaged eye descent is maximized at 12­13-km height. Warming is not generally maximized

206

DESIGN AND EVALUATION OF A SAMPLER FOR MEASURING THE NEAR-BOTTOM VERTICAL DISTRIBUTION OF  

E-Print Network [OSTI]

DESIGN AND EVALUATION OF A SAMPLER FOR MEASURING THE NEAR-BOTTOM VERTICAL DISTRIBUTION OF PINK distribution of shrimp was considered essential to the design of an effective shrimp trawl since the vertical. Subsequently a multipurpose shrimp sampler was designed to facilitate investigation of shrimp distributions

207

DIEL MOVEMENT AND VERTICAL DISTRIBUTION OF JUVENILE ANADROMOUS FISH IN TURBINE INTAKES  

E-Print Network [OSTI]

DIEL MOVEMENT AND VERTICAL DISTRIBUTION OF JUVENILE ANADROMOUS FISH IN TURBINE INTAKES BY CLIFFORD, WASH. 98102 ABSTRACT The behavior of fingerling salmonids was measured in turbine intakes of The Dalles in Kaplan turbines. At The Dalles Dam, diel movement and vertical distribution were sampled at both ends

208

Response of a Vertical Axis Wind Turbine to Time Varying Wind Conditions found within the Urban  

E-Print Network [OSTI]

Response of a Vertical Axis Wind Turbine to Time Varying Wind Conditions found within the Urban, 2010 PP 389­401 389 ABSTRACT Experimental testing of a vertical axis wind turbine within the urban of the turbine. Temporal variation of the wind with respect to the direction and velocity fluctuations

Tullis, Stephen

209

Vertical Structure of Tropical Cyclone Rainbands as Seen by the TRMM Precipitation Radar  

E-Print Network [OSTI]

Vertical Structure of Tropical Cyclone Rainbands as Seen by the TRMM Precipitation Radar DEANNA A Measurement Mission satellite's Precipitation Radar (TRMM PR) show the vertical structure of tropical cyclone separated by the melting layer. The ice layer is a combination of particles imported from the eyewall

Houze Jr., Robert A.

210

Vertical Structure of Tropical Cyclone Rainbands as seen by the TRMM Precipitation Radar  

E-Print Network [OSTI]

1 Vertical Structure of Tropical Cyclone Rainbands as seen by the TRMM Precipitation Radar Deanna A (TRMM PR) show the vertical structure of tropical cyclone rainbands. Radar-echo2 statistics show that rainbands have a two-layered structure, with distinct modes separated by the3 melting layer. The ice layer

Houze Jr., Robert A.

211

Vertical Structure of Tropical Cyclone Rainbands as seen by the TRMM Precipitation Radar  

E-Print Network [OSTI]

1 Vertical Structure of Tropical Cyclone Rainbands as seen by the TRMM Precipitation Radar Deanna A's Precipitation Radar (TRMM PR) show the vertical structure of tropical cyclone rainbands. Radar-echo statistics show that rainbands have a two-layered structure, with distinct modes separated by the melting layer

Houze Jr., Robert A.

212

Vertical Integration in Gasoline Supply: An Empirical Test of Raising Rivals' Costs  

E-Print Network [OSTI]

PWP-084 Vertical Integration in Gasoline Supply: An Empirical Test of Raising Rivals' Costs Justine-5180 www.ucei.org #12;Vertical Integration in Gasoline Supply: An Empirical Test of Raising Rivals' Costs gasoline prices. The 1997 acquisition of Unocal's West Coast refining and marketing assets by Tosco

California at Berkeley. University of

213

A Low Order Model for Vertical Axis Wind Turbines Isaac M. Asher  

E-Print Network [OSTI]

A Low Order Model for Vertical Axis Wind Turbines Isaac M. Asher , Mark Drela and Jaime Peraire and performance prediction of vertical axis wind turbines is presented. The model uses a 2D hybrid dynamic vortex taken into account. Fast convergence is obtained for a large range of solidity and tip speed ratio

Peraire, Jaime

214

Improving the detection ...1 Improving the detection of On-line Vertical Port Scan  

E-Print Network [OSTI]

Improving the detection ...1 Improving the detection of On-line Vertical Port Scan Improving the detection of On-line Vertical Port Scan in IP Traffic Yousra Chabchoub , Christine Fricker and Philippe to detect port scan attacks in IP traffic. Only relevant information about destination IP addresses

Paris-Sud XI, Université de

215

Soft-X-Ray-Charged Vertical Electrets and Its Application to Electrostatic Transducers  

E-Print Network [OSTI]

Soft-X-Ray-Charged Vertical Electrets and Its Application to Electrostatic Transducers Makoto A novel charging method for vertical electrets in narrow gaps using soft X-rays has been developed is necessary after charging the electrets. Recently, we have developed a new charging method using soft X-ray

Kasagi, Nobuhide

216

Pressure drop characteristics of gasliquid two-phase ow in vertical miniature triangular channels  

E-Print Network [OSTI]

air±water two-phase ¯ow through vertical miniature triangular channels having hydraulic diameters of 0 2001 Elsevier Science Ltd. All rights reserved. Keywords: Air±water two-phase ¯ow; Drift velocity; Void] experimentally investigated the ¯ow of co- current upward air±water two-phase ¯ow in vertical miniature

Zhao, Tianshou

217

THE SCALE PROBLEM FOR OLD MAPS (and mental maps)  

E-Print Network [OSTI]

THE SCALE PROBLEM FOR OLD MAPS (and mental maps) Waldo Tobler From the theory of cartography we know that the instantaneous scale at a point on any map is always represented by the equation: dS2 /ds2 = g cos2 + 2g cos sin + g sin2 . This shows that the scale on a map is generally different in all

Tobler, Waldo

218

Scaling hydraulic properties of a macroporous soil Binayak P. Mohanty  

E-Print Network [OSTI]

Scaling hydraulic properties of a macroporous soil Binayak P. Mohanty U.S. Salinity Laboratory, Riverside, California Abstract. Macroporous soils exhibit significant differences in their hydraulic properties for different pore domains. Multimodal hydraulic functions may be used to describe

Mohanty, Binayak P.

219

Nano scale devices for plasmonic nanolithography and rapid sensing of bacteria  

E-Print Network [OSTI]

This dissertation contains two different research topics. One is a ‘Nano Scale Device for Plasmonic Nanolithography – Optical Antenna’ and the other is a ‘Nano Scale Device for Rapid Sensing of Bacteria – SEPTIC’. Since these two different research...

Seo, Sungkyu

2009-05-15T23:59:59.000Z

220

Sandia National Laboratories: vertical-axis wind turbine research  

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 systems Scaled Wind Farm Technologyvertical-axis wind

Note: This page contains sample records for the topic "vertical scales differ" 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

The Improbability scale  

SciTech Connect (OSTI)

The Improbability Scale (IS) is proposed as a way of communicating to the general public the improbability (and by implication, the probability) of events predicted as the result of scientific research. Through the use of the Improbability Scale, the public will be able to evaluate more easily the relative risks of predicted events and draw proper conclusions when asked to support governmental and public policy decisions arising from that research.

Ritchie, David J.; /Fermilab

2005-03-01T23:59:59.000Z

222

Study of instabilities and quasi-two-dimensional turbulence in volumetrically heated magnetohydrodynamic flows in a vertical rectangular duct  

E-Print Network [OSTI]

magnetohydrodynamic flows in a vertical rectangular duct N. Vetcha, S. Smolentsev, M. Abdou, and R. Moreau Citation in a vertical rectangular duct N. Vetcha,1 S. Smolentsev,1,a) M. Abdou,1 and R. Moreau2 1 Mechanical

Abdou, Mohamed

223

Numerical modeling of a 2K J-T heat exchanger used in Fermilab Vertical Test Stand VTS-1  

SciTech Connect (OSTI)

Fermilab Vertical Test Stand-1 (VTS-1) is in operation since 2007 for testing the superconducting RF cavities at 2 K. This test stand has single layer coiled finned tubes heat exchanger before J-T valve. A finite difference based thermal model has been developed in Engineering Equation Solver (EES) to study its thermal performance during filling and refilling to maintain the constant liquid level of test stand. The model is also useful to predict its performance under other various operating conditions and will be useful to design the similar kind of heat exchanger for future needs. Present paper discusses the different operational modes of this heat exchanger and its thermal characteristics under these operational modes. Results of this model have also been compared with the experimental data gathered from the VTS-1 heat exchanger and they are in good agreement with the present model.

Gupta, Prabhat Kumar [Raja Ramanna Centre for Advanced Technology (RRCAT), Indore (MP), India; Rabehl, Roger [FNAL

2014-07-01T23:59:59.000Z

224

Monsoon-driven vertical fluxes of organic pollutants in the western Arabian Sea  

SciTech Connect (OSTI)

A time series of sinking particles from the western Arabian Sea was analyzed for aliphatic and polycyclic aromatic hydrocarbons, polychlorinated biphenyls, 4,4{prime}-DDT and 4,4{prime}-DDE, to assess the role of monsoons on their vertical flux in the Indian Ocean. Concurrently, molecular markers such as sterols and linear and branched alkanes were analyzed enabling the characterization of the biogenic sources and biogeochemical processes occurring during the sampling period. Hierarchical cluster analysis (HCA) of the data set of concentrations and fluxes of these compounds confirmed a seasonal variability driven by the SW and NE monsoons. Moreover, the influence of different air masses is evidenced by the occurrence of higher concentrations of DDT, PCBs, and pyrolytic PAHs during the NE monsoon and of fossil hydrocarbons during the SW monsoon. Total annual fluxes to the deep Arabian Sea represent an important removal contribution of persistent organic pollutants, thus not being available for the global distillation process (volatilization and atmospheric transport from low or mid latitudes to cold areas). Therefore, monsoons may play a significant role on the global cycle of organic pollutants.

Dachs, J.; Bayona, J.M.; Ittekkot, V.; Albaiges, J.

1999-11-15T23:59:59.000Z

225

A Study of Vertical Gas Jets in a Bubbling Fluidized Bed  

SciTech Connect (OSTI)

A detailed experimental study of a vertical gas jet impinging a fluidized bed of particles has been conducted with the help of Laser Doppler Velocimetry measurements. Mean and fluctuating velocity profiles of the two phases have been presented and analyzed for different fluidization states of the emulsion. The results of this work would be greatly helpful in understanding the complex two-phase mixing phenomenon that occurs in bubbling beds, such as in coal and biomass gasification, and also in building more fundamental gas-solid Eulerian/Lagrangian models which can be incorporated into existing CFD codes. Relevant simulations to supplement the experimental findings have also been conducted using the Department of Energyâ??s open source code MFIX. The goal of these simulations was two-fold. One was to check the two-dimensional nature of the experimental results. The other was an attempt to improve the existing dense phase Eulerian framework through validation with the experimental results. In particular the sensitivity of existing frictional models in predicting the flow was investigated. The simulation results provide insight on wall-bounded turbulent jets and the effect frictional models have on gas-solid bubbling flows. Additionally, some empirical minimum fluidization correlations were validated for non-spherical particles with the idea of extending the present study to non-spherical particles which are more common in industries.

Steven Ceccio; Jennifer Curtis

2011-01-18T23:59:59.000Z

226

Application Signal Threshold Adaptation for Vertical Handoff in Heterogeneous Wireless  

E-Print Network [OSTI]

-technology handoff take place. Intra- technology handoff is the traditional Horizontal Handoff (HHO) process in which between different access technologies. The main distinction between VHO and HHO is symmetry. #12;While HHO

Liang, Ben

227

Design and Test of a Vertical-Axis Wind Turbine with Pitch Control J. J. Miau1,a  

E-Print Network [OSTI]

Design and Test of a Vertical-Axis Wind Turbine with Pitch Control J. J. Miau1,a , S. Y. Liang2 , R, USA a jjmiau@mail.ncku.edu.tw Keywords: vertical-axis wind turbine, pitch control, wind of a small vertical-axis wind turbine. Benefits gained can be shown by the experimental and numerical results

Leu, Tzong-Shyng "Jeremy"

228

FSI Modeling of Vertical-Axis Wind Turbines Y. Bazilevs, A. Korobenko, X. Deng, and J. Yan  

E-Print Network [OSTI]

FSI Modeling of Vertical-Axis Wind Turbines Y. Bazilevs, A. Korobenko, X. Deng, and J. Yan-dependent aerodynamics and fluid-structure interaction (FSI) simula- tions of a Darrieus-type vertical-axis wind turbine compared to the vertical-axis wind turbine (VAWT) designs. However, smaller-size VAWTs are more suitable

Dabiri, John O.

229

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

E-Print Network [OSTI]

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

Paris-Sud XI, Université de

230

Onset and Subsequent Transient Phenomena of Liquid Loading in Gas Wells: Experimental Investigation Using a Large Scale Flow Loop  

E-Print Network [OSTI]

was carried out to study the onset of liquid loading and the subsequent transient phenomena, using a large scale flow loop to visualize two-phase flow regimes, and to measure pressure and liquid holdup along a 42-m long vertical tube. From this investigation...

Waltrich, Paulo

2012-10-19T23:59:59.000Z

231

Received 1 May 2013 | Accepted 26 Jul 2013 | Published 3 Sep 2013 Atomic layer lithography of wafer-scale  

E-Print Network [OSTI]

because of the lack of reliable technology to fabricate uniform nanogaps with atomic-scale resolution and simple adhesive-tape-based planarization. Using this method, we create vertically oriented gaps in opaque the nanogaps, enabling background- free transmission measurements. We observe resonant transmission of near

Park, Namkyoo

232

Energy Efficient Aluminum Production - Pilot-Scale Cell Tests - Final Report for Phase I and Phase II  

SciTech Connect (OSTI)

A cermet anode that produces oxygen and a cathode material that is wetted by aluminum can provide a dimensionally stable inter-electrode distance in the Hall-Heroult cell. This can be used to greatly improve the energy and/or productivity efficiencies. The concept, which was developed and tested, uses a system of vertically interleaved anodes and cathodes. The major advantage of this concept is the significant increase in electrochemical surface area compared to a horizontal orientation of anode and cathode that is presently used in the Hall-Heroult process. This creates an additional advantage for energy reduction of 1.3 kWh/lb or a 20% productivity improvement. The voltages obtained in an optimized cell test met the energy objectives of the project for at least two weeks. An acceptable current efficiency was never proven, however, during either pilot scale or bench scale tests with the vertical plate configuration. This must be done before a vertical cell can be considered viab le. Anode corrosion rate must be reduced by at least a factor of three in order to produce commercial purity aluminum. It is recommended that extensive theoretical and bench scale investigations be done to improve anode materials and to demonstrate acceptable current efficiencies in a vertical plate cell before pilot scale work is continued.

R. A. Christini

1999-12-30T23:59:59.000Z

233

Accelerated Least Squares Multidimensional Scaling  

E-Print Network [OSTI]

x(make_x(36,2)) xACCELERATED SCALING R EFERENCES I.ACCELERATED LEAST SQUARES MULTIDIMENSIONAL SCALING JAN DEare simpler to write. ACCELERATED SCALING It is shown in De

Leeuw, Jan de

2006-01-01T23:59:59.000Z

234

Accelerated Least Squares Multidimensional Scaling  

E-Print Network [OSTI]

x(make_x(36,2)) xACCELERATED SCALING R EFERENCES I.ACCELERATED LEAST SQUARES MULTIDIMENSIONAL SCALING JAN DEare simpler to write. ACCELERATED SCALING It is shown in De

Jan de Leeuw

2011-01-01T23:59:59.000Z

235

Accepted Manuscript Bound on vertical heat transport at large Prandtl number  

E-Print Network [OSTI]

is the ratio of kinematic viscosity over thermal diffusivity, and the fluids occupy the (non this article as: X. Wang, Bound on vertical heat transport at large Prandtl number, Physica D (2007), doi:10

Wang, Xiaoming

236

Vertical Phasing as a Corporate Real Estate Strategy and Development Option  

E-Print Network [OSTI]

Purpose – The purpose of this paper is to demonstrate the potential value of significant vertical phasing – that is, the addition of five or more stories to an existing building – as a valuable real option in real estate ...

Guma, Anthony

2009-01-01T23:59:59.000Z

237

A Simple Model of Climatological Rainfall and Vertical Motion Patterns over the Tropical Oceans  

E-Print Network [OSTI]

A simple model is developed that predicts climatological rainfall, vertical motion, and diabatic heating profiles over the tropical oceans given the sea surface temperature (SST), using statistical relationships deduced ...

Back, Larissa E.

238

The role of vertical buoyancy distributions in simulated low-topped supercells  

E-Print Network [OSTI]

. This study examines the role of low-level vertical buoyancy distributions in influencing supercell updraft intensity and persistence, and on mid-level and low-level mesocyclone development. The emphasis is to examine wind, temperature, and moisture profiles...

Cantrell, Louis Edward

1995-01-01T23:59:59.000Z

239

Simulation and fabrication of GaN-based vertical and lateral normally-off power transistors  

E-Print Network [OSTI]

This thesis is divided in two parts. First, self-consistent electro-thermal simulations have been performed for single finger and multi-finger GaN-based vertical and lateral power transistors and were validated with ...

Zhang, Yuhao, S.M. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

240

Analytical Modeling of Wood Frame Shear Walls Subjected to Vertical Load  

E-Print Network [OSTI]

A nonlinear automated parameter fitted analytical model that numerically predicts the load-displacement response of wood frame shear walls subjected to static monotonic loading with and without vertical load is presented. This analytical model...

Nguyendinh, Hai

2011-08-08T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Flooding Experiments with Steam and Water in a Large Diameter Vertical Tube  

E-Print Network [OSTI]

An experimental study on flooding with steam and water in a large diameter vertical tube was conducted. This research has been performed to provide a better prediction of flooding in a pressurized water reactor (PWR) pressurizer surge line...

Williams, Susan Nicole

2010-10-12T23:59:59.000Z

242

E-Print Network 3.0 - active vertical fin Sample Search Results  

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

Summary: active to tilt the caudal fin at an angle to the vertical 26. In some fish, especially those known... . Low-aspect ratio pectoral fins in sharks function to alter...

243

Effect of Ionic Stabilization on Vertical Movement in Expansive Subgrade Soils in Texas  

E-Print Network [OSTI]

An important consideration for the successful design of flexible pavement systems in Texas is the prediction and control of the vertical change in height of the subgrade soils due to swelling upon wetting and shrinkage upon drying. The purpose...

Hariharan, Narain

2013-07-31T23:59:59.000Z

244

A PURELY NUMERICAL APPROACH FOR ANALYZING FLOW TO A WELL INTERCEPTING A VERTICAL FRACTURE  

E-Print Network [OSTI]

W.R. Effect of vertical fracture on reservoir behavior --of deep, penetrating fractures in the wattenberg Field.flow through a single fracture. PhD Dissertation, Department

Narasimhan, T.N.

2011-01-01T23:59:59.000Z

245

Author's personal copy Thorium-234 as a tracer of spatial, temporal and vertical variability  

E-Print Network [OSTI]

Author's personal copy Thorium-234 as a tracer of spatial, temporal and vertical variability 2009 Accepted 6 April 2009 Available online 16 April 2009 Keywords: Thorium-234 Particle flux Sediment

Buesseler, Ken

246

Some hydrodynamic characteristics of bubbly mixtures flowing vertically upward in tubes  

E-Print Network [OSTI]

An investigation of bubbly flow has been conducted in vertical plexiglass tubes using air and water at atmospheric pressure. The bubbly flow pattern is an entrance condition or a non-fully developed flow. A spontaneous ...

Rose, Sewell C.

1964-01-01T23:59:59.000Z

247

E-Print Network 3.0 - air-water vertical upward Sample Search...  

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

Search Powered by Explorit Topic List Advanced Search Sample search results for: air-water vertical upward Page: << < 1 2 3 4 5 > >> 1 Journal of Colloid and Interface Science...

248

anular vertical no-newtoniano: Topics by E-print Network  

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

13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 101 Fast Vertical Mining Using Diffsets Mohammed J. Zaki Physics Websites Summary: Introduction Mining...

249

E-Print Network 3.0 - annular vertical flow Sample Search Results  

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

dotted line indicates the exit plane... of vertical annular liquid jets. ASME Journal of Fluids Engineering 1984; 106:45-51. 4. Kihm KD, Chigier NA... :117-130 (DOI: 10.1002...

250

July 7, 2008 Vertical temperature profile and mesospheric winds retrieval on  

E-Print Network [OSTI]

), its abundance vertical profile has been studied in order to understand the recycling of CO into CO2 range (Billebaud et al. 1992, 1998). These observations led to the conclusion that CO has a rel- atively

251

Achieving large stable vertical displacement in surface-micromachined microelectromechanical systems (MEMS)  

E-Print Network [OSTI]

This thesis describes electrostatic actuation techniques and mechanical design features for realizing large planar analog vertical travel in an electrostatically actuated diffractive mid-infrared optical device, which is ...

Deutsch, Erik R. (Erik Robertson), 1974-

2002-01-01T23:59:59.000Z

252

Wind Tunnel Blockage Corrections: An Application to Vertical-Axis Wind Turbines.  

E-Print Network [OSTI]

?? An investigation into wake and solid blockage effects of Vertical-Axis Wind Turbines (VAWTs) in closed test-section wind tunnel testing is described. Static wall pressures… (more)

Ross, Ian Jonathan

2010-01-01T23:59:59.000Z

253

Development of a Digital Controller for a Vertical Wind Tunnel (VWT) Prototype to Mitigate Ball Fluctuations  

E-Print Network [OSTI]

The objective of this research was to mitigate fluctuations of a levitated ping pong ball within a vertical wind tunnel (VWT) prototype. This was made possible by remodeling the VWT system with its inherent nonlinear characteristics instead...

Silva, Ramon A.

2011-08-08T23:59:59.000Z

254

Vertical inertial sliding drive for coarse and fine approaches in scanning probe microscopy  

E-Print Network [OSTI]

vibrational noise. The extension of the technique to a vertical orientation required by many SPM applications stepper motors4 to more elegant approaches such as the "louse,"5 "Besocke," beetle,6 "Inchworm® ,"7

Gimzewski, James

255

Transition from film boiling to nucleate boiling in forced convection vertical flow  

E-Print Network [OSTI]

The mechanism of collapse of forced cnnvection annular vertical flow film boiling, with liquid core, is investigated using liquid nitrogen at low pressures. The report includes the effect of heat flux from the buss bar. ...

Iloeje, Onwuamaeze C.

1972-01-01T23:59:59.000Z

256

Final Technical Report for "Radiative Heating Associated with Tropical Convective Cloud Systems: Its Importance at Meso and Global Scales"  

SciTech Connect (OSTI)

Heating associated with tropical cloud systems drive the global circulation. The overall research objectives of this project were to i) further quantify and understand the importance of heating in tropical convective cloud systems with innovative observational techniques, and ii) use global models to determine the large-scale circulation response to variability in tropical heating profiles, including anvil and cirrus cloud radiative forcing. The innovative observational techniques used a diversity of radar systems to create a climatology of vertical velocities associated with the full tropical convective cloud spectrum along with a dissection of the of the total heating profile of tropical cloud systems into separate components (i.e., the latent, radiative, and eddy sensible heating). These properties were used to validate storm-scale and global climate models (GCMs) and were further used to force two different types of GCMs (one with and one without interactive physics). While radiative heating was shown to account for about 20% of the total heating and did not have a strong direct response on the global circulation, the indirect response was important via its impact on convection, esp. in how radiative heating impacts the tilt of heating associated with the Madden-Julian Oscillation (MJO), a phenomenon that accounts for most tropical intraseasonal variability. This work shows strong promise in determining the sensitivity of climate models and climate processes to heating variations associated with cloud systems.

Schumacher, Courtney

2012-12-13T23:59:59.000Z

257

Horizontal Inequity and Vertical Redistribution with Indirect Taxes: the Greek Case  

E-Print Network [OSTI]

license issue fee and an initial registration tax, varying according to the vehicle’s engine power and technology. Cars are also subject to an annual transport due, also varying according to engine power. Stamp duties are levied on a large number... preferences, while improvements in vertical redistribution can be achieved, albeit at the cost of increased horizontal inequity. Keywords: distributional effect of taxes, horizontal inequality, vertical redistribution, indirect tax reform, Greece JEL...

Kaplanoglou, G; Newbery, David

258

Free field realization of current superalgebra gl(m vertical bar n){sub k}  

SciTech Connect (OSTI)

We construct the free field representation of the affine currents, energy-momentum tensor, and screening currents of the first kind of the current superalgebra gl(m vertical bar n){sub k} uniformly for m=n and m{ne}n. The energy-momentum tensor is given by a linear combination of two Sugawara tensors associated with the two independent quadratic Casimir elements of gl(m vertical bar n)

Yang Wenli; Zhang Yaozhong; Liu Xin [Institute of Modern Physics, Northwest University, Xian 710069 (China) and Department of Mathematics, University of Queensland, Brisbane, Queensland 4072 (Australia); Department of Mathematics, University of Queensland, Brisbane, Queensland 4072 (Australia) and Condensed Matter Theory Laboratory, RIKEN, Wako, Saitama 351-0198 (Japan); Department of Mathematics, University of Queensland, Brisbane, Queensland 4072 (Australia)

2007-05-15T23:59:59.000Z

259

Identification of subsurface fractures in the Austin Chalk using vertical seismic profiles  

E-Print Network [OSTI]

IDENTIFICATION OF SUSSURFACE FRACTURES IN THE AUSTIN CHALK USING VERTICAL SEISMIC PROFILES A Thesis by KYLE THOMAS LEWALLEN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE August 1992 Major Subject: Geophysics IDENTIFICATION OF SUBSURFACE FRACTURES IN THE AUSTIN CHALK USING VERTICAL SEISMIC PROFILES A Thesis by KYLE THOMAS LEWALLEN Approved as to style and content by: T. W. Spencer...

Lewallen, Kyle Thomas

1992-01-01T23:59:59.000Z

260

A placement model for matrix acidizing of vertically extensive, multilayer gas reservoirs  

E-Print Network [OSTI]

A PLACEMENT MODEL FOR MATRIX ACIDIZING OF VERTICALLY EXTENSIVE, MULTILAYER GAS RESERVOIRS A Thesis by MANABU NOZAKI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE August 2008 Major Subject: Petroleum Engineering A PLACEMENT MODEL FOR MATRIX ACIDIZING OF VERTICALLY EXTENSIVE, MULTILAYER GAS RESERVOIRS A Thesis by MANABU NOZAKI Submitted to the Office...

Nozaki, Manabu

2008-10-10T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

The effect of vertical fractures on the behavior of a stratified reservoir under waterflood  

E-Print Network [OSTI]

THE EFFECT OF VERTICAL FRACTURES ON THE BEHAVIOR OF A STRATIFIED RESERVOIR UNDER WATERFLOOD A Thesis Bobby E Pettitt Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in Partial i...'ulfillment of the requirements for the degree of MASTER OF SCIENCE August~ 1963 Major Sub]ect: Petroleum Engineering THE EFFECT GF VERTICAL FRACTURES ON THE BEHAVIOR OF A STRATIFIED RESERVOIR UNDER WATERFLOOD A Thesis by Bobby E. Pettitt Approved as to style...

Pettitt, Bobby Eugene

1963-01-01T23:59:59.000Z

262

High Seastate Container Transfer System/Auxillary Crane Ship vertical relative motion analysis  

E-Print Network [OSTI]

) Michael James Ottens, B. S. ; U. S. Military Academy Chairman of Advisory Committee: Dr. Cheung H. Kim The transfer of cargo by crane from ship to lighter outside of sheltered ports can be adversely affected by the sea environment, Wave... of vertical relative motions exceed prescribed safety factors. Additionally, there is a continuing need to develop improved seakeeping designs of ships/lighterage. This paper calculates theoretically the vertical relative motions between a cargo ship...

Ottens, Michael James

1992-01-01T23:59:59.000Z

263

Co-current airwater two-phase ow patterns in vertical triangular microchannels  

E-Print Network [OSTI]

Co-current air±water two-phase ¯ow patterns in vertical triangular microchannels T.S. Zhao * , Q Characteristics of co-current upward air±water two-phase ¯ow patterns in vertical equilateral triangular channels tubes has been re- ported. Damianides (1987) experimentally studied the two-phase ¯ow of air±water

Zhao, Tianshou

264

Predictions From High Scale Mixing Unification Hypothesis  

E-Print Network [OSTI]

Starting with 'High Scale Mixing Unification' hypothesis, we investigate the renormalization group evolution of mixing parameters and masses for both Dirac and Majorana type neutrinos. Following this hypothesis, the PMNS mixing parameters are taken to be identical to the CKM ones at a unifying high scale. Then, they are evolved to a low scale using MSSM renormalization-group equations. For both type of neutrinos, the renormalization group evolution 'naturally' results in a non-zero and small value of leptonic mixing angle $\\theta_{13}$. One of the important predictions of this analysis is that, in both cases, the mixing angle $\\theta_{23}$ turns out to be non-maximal for most of the parameter range. We also elaborate on the important differences between Dirac and Majorana neutrinos within our framework and how to experimentally distinguish between the two scenarios. Furthermore, for both cases, we also derive constraints on the allowed parameter range for the SUSY breaking and unification scales, for which th...

Srivastava, Rahul

2015-01-01T23:59:59.000Z

265

Pore-fluid effects on seismic waves in vertically fractured earth with orthotropic symmetry  

SciTech Connect (OSTI)

For elastically noninteracting vertical-fracture sets at arbitrary orientation angles to each other, a detailed model is presented in which the resulting anisotropic fractured medium generally has orthorhombic symmetry overall. Some of the analysis methods and ideas of Schoenberg are emphasized, together with their connections to other similarly motivated and conceptually related methods by Sayers and Kachanov, among others. Examples show how parallel vertical-fracture sets having HTI (horizontal transversely isotropic) symmetry transform into orthotropic fractured media if some subsets of the vertical fractures are misaligned with the others, and then the fractured system can have VTI (vertical transversely isotropic) symmetry if all of the fractures are aligned randomly or half parallel and half perpendicular to a given vertical plane. An orthotropic example having vertical fractures in an otherwise VTI earth system (studied previously by Schoenberg and Helbig) is compared with the other examples treated and it is finally shown how fluids in the fractures affect the orthotropic poroelastic system response to seismic waves. The key result is that fracture-influence parameters are multiplied by a factor of (1-B), where 0 {le} B < 1 is Skempton's second coefficient for poroelastic media. Skempton's B coefficient is itself a measurable characteristic of fluid-saturated porous rocks, depending on porosity, solid moduli, and the pore-fluid bulk modulus. For heterogeneous porous media, connections between the present work and earlier related results of Brown and Korringa are also established.

Berryman, J.G.

2010-05-15T23:59:59.000Z

266

Method and apparatus for determining vertical heat flux of geothermal field  

DOE Patents [OSTI]

A method and apparatus for determining vertical heat flux of a geothermal field, and mapping the entire field, is based upon an elongated heat-flux transducer (10) comprised of a length of tubing (12) of relatively low thermal conductivity with a thermopile (20) inside for measuring the thermal gradient between the ends of the transducer after it has been positioned in a borehole for a period sufficient for the tube to reach thermal equilibrium. The transducer is thermally coupled to the surrounding earth by a fluid annulus, preferably water or mud. A second transducer comprised of a length of tubing of relatively high thermal conductivity is used for a second thermal gradient measurement. The ratio of the first measurement to the second is then used to determine the earth's thermal conductivity, k.sub..infin., from a precalculated graph, and using the value of thermal conductivity thus determined, then determining the vertical earth temperature gradient, b, from predetermined steady state heat balance equations which relate the undisturbed vertical earth temperature distributions at some distance from the borehole and earth thermal conductivity to the temperature gradients in the transducers and their thermal conductivity. The product of the earth's thermal conductivity, k.sub..infin., and the earth's undisturbed vertical temperature gradient, b, then determines the earth's vertical heat flux. The process can be repeated many times for boreholes of a geothermal field to map vertical heat flux.

Poppendiek, Heinz F. (LaJolla, CA)

1982-01-01T23:59:59.000Z

267

Angular Scaling In Jets  

SciTech Connect (OSTI)

We introduce a jet shape observable defined for an ensemble of jets in terms of two-particle angular correlations and a resolution parameter R. This quantity is infrared and collinear safe and can be interpreted as a scaling exponent for the angular distribution of mass inside the jet. For small R it is close to the value 2 as a consequence of the approximately scale invariant QCD dynamics. For large R it is sensitive to non-perturbative effects. We describe the use of this correlation function for tests of QCD, for studying underlying event and pile-up effects, and for tuning Monte Carlo event generators.

Jankowiak, Martin; Larkoski, Andrew J.; /SLAC

2012-02-17T23:59:59.000Z

268

SCALED EXPERIMENTS EVALUATING PULSE JET MIXING OF SLURRIES  

SciTech Connect (OSTI)

Pulse jet mixing (PJM) tests with noncohesive solids in Newtonian liquid were conducted at three geometric scales to support the design of mixing systems for the Hanford Waste Treatment and Immobilization Plant. The test data will be used to develop mixing models. The models predict the cloud height (the height to which solids will be lifted by the PJM action) and the critical suspension velocity (the minimum velocity needed to ensure all solids have been lifted from the floor. From the cloud height estimate, the concentration of solids near the vessel floor and the minimum velocity predicted to lift solids can be calculated. The test objective was to observe the influence of vertically downward-directed jets on noncohesive solids in a series of scaled tanks with several bottom shapes. The test tanks and bottom shapes included small-and large-scale tanks with elliptical bottoms, a mid-scale tank with a spherical bottom, and a large-scale tank with an F&D bottom. During testing, the downward-directed jets were operated in either a steady flow condition or a pulsed (periodic) flow condition. The mobilization of the solids resulting from the jets was evaluated based on: the motion/agitation of the particulate on the tank floor and the elevation the solids reach within the tank; the height the solids material reaches in the tank is referred to as the cloud height (HC).

Bamberger, Judith A.; Meyer, Perry A.; Enderlin, Carl W.; Fort, James A.; Wells, Beric E.; Minette, Michael J.; Burns, Carolyn A.; Baer, Ellen BK; Eakin, David E.; Elmore, Monte R.; Snyder, Sandra F.

2009-11-13T23:59:59.000Z

269

Sensor system scaling issues  

SciTech Connect (OSTI)

A model for IR sensor performance is used to compare estimates of sensor cost effectiveness. Although data from aircraft sensors indicate a weaker scaling, their agreement is adequate to support the assessment of the benefits of operating up to the maximum altitude of most current UAVs.

Canavan, G.H.

1996-07-01T23:59:59.000Z

270

PAIN SCALES (ATTACHMENT A)  

E-Print Network [OSTI]

TOTAL SCORE: ADD INDIVIDUAL ASSESSMENT SCORES TO DETERMINE THE TOTAL PAIN SCORE. TOTAL THE 5 CATEGORIES FOR TOTAL PAIN SCORE. MAXIMUM SCORE = 10/10. Reference: Merkel SJ, et al. The FLACC: A Behavioral Pain Scale or groan. Low level speech with a negative or disapproving quality. Repeated troubled calling out. Loud

Oliver, Douglas L.

271

Mathematics Achievement Scale Score  

E-Print Network [OSTI]

Croatia 490 New Zealand 486 Spain 482 Romania 482 Poland 481 Turkey 469 Azerbaijan 463 Chile 462 Thailand Romania 505 Spain 505 Poland 505 TIMSS Scale Centerpoint 500 New Zealand 497 Kazakhstan 495 Norway 494 Kazakhstan 487 Sweden 484 Ukraine 479 Norway 475 Armenia 467 Romania 458 United Arab Emirates 456 Turkey 452

Huang, Jianyu

272

Scaling Relationships Based on Scaled Tank Mixing and Transfer Test Results  

SciTech Connect (OSTI)

This report documents the statistical analyses performed (by Pacific Northwest National Laboratory for Washington River Protection Solutions) on data from 26 tests conducted using two scaled tanks (43 and 120 inches) in the Small Scale Mixing Demonstration platform. The 26 tests varied several test parameters, including mixer-jet nozzle velocity, base simulant, supernatant viscosity, and capture velocity. For each test, samples were taken pre-transfer and during five batch transfers. The samples were analyzed for the concentrations (lbs/gal slurry) of four primary components in the base simulants (gibbsite, stainless steel, sand, and ZrO2). The statistical analyses including modeling the component concentrations as functions of test parameters using stepwise regression with two different model forms. The resulting models were used in an equivalent performance approach to calculate values of scaling exponents (for a simple geometric scaling relationship) as functions of the parameters in the component concentration models. The resulting models and scaling exponents are displayed in tables and graphically. The sensitivities of component concentrations and scaling exponents to the test parameters are presented graphically. These results will serve as inputs to subsequent work by other researchers to develop scaling relationships that are applicable to full-scale tanks.

Piepel, Gregory F.; Holmes, Aimee E.; Heredia-Langner, Alejandro

2013-09-18T23:59:59.000Z

273

Scaling Relationships Based on Scaled Tank Mixing and Transfer Test Results  

SciTech Connect (OSTI)

This report documents the statistical analyses performed (by Pacific Northwest National Laboratory for Washington River Protection Solutions) on data from 26 tests conducted using two scaled tanks (43 and 120 inches) in the Small Scale Mixing Demonstration platform. The 26 tests varied several test parameters, including mixer-jet nozzle velocity, base simulant, supernatant viscosity, and capture velocity. For each test, samples were taken pre-transfer and during five batch transfers. The samples were analyzed for the concentrations (lbs/gal slurry) of four primary components in the base simulants (gibbsite, stainless steel, sand, and ZrO2). The statistical analyses including modeling the component concentrations as functions of test parameters using stepwise regression with two different model forms. The resulting models were used in an equivalent performance approach to calculate values of scaling exponents (for a simple geometric scaling relationship) as functions of the parameters in the component concentration models. The resulting models and scaling exponents are displayed in tables and graphically. The sensitivities of component concentrations and scaling exponents to the test parameters are presented graphically. These results will serve as inputs to subsequent work by other researchers to develop scaling relationships that are applicable to full-scale tanks.

Piepel, Gregory F.; Holmes, Aimee E.; Heredia-Langner, Alejandro; Lee, Kearn P.; Kelly, Steven E.

2014-01-01T23:59:59.000Z

274

Beam Profile Monitor With Accurate Horizontal And Vertical Beam Profiles  

DOE Patents [OSTI]

A widely used scanner device that rotates a single helically shaped wire probe in and out of a particle beam at different beamline positions to give a pair of mutually perpendicular beam profiles is modified by the addition of a second wire probe. As a result, a pair of mutually perpendicular beam profiles is obtained at a first beamline position, and a second pair of mutually perpendicular beam profiles is obtained at a second beamline position. The simple modification not only provides more accurate beam profiles, but also provides a measurement of the beam divergence and quality in a single compact device.

Havener, Charles C [Knoxville, TN; Al-Rejoub, Riad [Oak Ridge, TN

2005-12-26T23:59:59.000Z

275

Vertical Variability in Saturated Zone Hydrochemistry Near Yucca Mountain, Nevada  

SciTech Connect (OSTI)

The differences in the saturated zone hydrochemistry with depth at borehole NC-EWDP-22PC reflect the addition of recharge along Fortymile Wash. The differences in water chemistry with depth at borehole NC-EWDP-19PB appear to indicate that other processes are involved. Water from the lower part of NC-EWDP-19PB possesses chemical characteristics that clearly indicate that it has undergone cation exchange that resulted in the removal of calcium and magnesium and the addition of sodium. This water is very similar to water from the Western Yucca Mountain facies that has previously been thought to flow west of NC-EWDP-19PB. Water from the lower zone in NC-EWDP-19PB also could represent water from the Eastern Yucca Mountain facies that has moved through clay-bearing or zeolitized aquifer material resulting in the altered chemistry. Water chemistry from the upper part of the saturated zone at NC-EWDP-19PB, both zones at NC-EWDP-22PC, and wells in the Fortymile Wash facies appears to be the result of recharge through the alluvium south of Yucca Mountain and within the Fortymile Wash channel.

G. Patterson; P. Striffler

2007-02-17T23:59:59.000Z

276

Effect of gaps on the performance of the vertically installed wet thermal insulator  

SciTech Connect (OSTI)

In SMART, the main flow path of the reactor coolant and the pressurizer partially share common walls in the reactor coolant system. To reduce this heat transfer, the wet thermal insulator (WTI) is installed on the inner wall of the pressurizer. The WTI is constituted of stacked thin stainless steel plates. The water layer width between the plates is chosen to suppress natural convection in each layer. The plates of the WTI require clearance for thermal expansion. When the WTI is installed on a vertical wall, this clearance might cause gaps at the top and bottom at the operating condition. In this study, we focused on the effect of gaps at the both ends on the WTI performance. A numerical simulation was conducted for an 8-layer WTI with gaps at the both ends. To compare with this, a simulation of a WTI without a gap, which is an ideal case, was also conducted. The simulation was conducted in a 2-dimensional manner by a commercial computational fluid dynamics code, FLUENT. The simulations showed that the WTI thermal performance was substantially decreased by a flow that circulated through the top and bottom gaps and water layers at the sides of the WTI. This circulation caused a high temperature difference between the wall and the circulating flow. To find a way to prevent this performance deterioration of the WTI we simulated several cases with the smaller gap heights. However, the flow circulation and the higher heat transfer rate were still observed even at a case with the smallest gap, which seems to be hardly achievable in a real installation. Another way of reducing the flow circulation was suggested and also simulated in this study. (authors)

Kim, S. H.; Kim, Y. I.; Park, C. T.; Choi, S.; Yoon, J. [Korea Atomic Energy Research Inst., Daeduk-daero 989-111, Yuseong-Gu, Daejeon, 305-353 (Korea, Republic of)

2012-07-01T23:59:59.000Z

277

Robot calibration without scaling  

E-Print Network [OSTI]

) Je rinkle (Member) arry Hogan (Member) eorge P. Peterson (Head of Department) May 1995 Major Subject: Mechanical Engineering 111 ABSTRACT Robot Calibration without Scaling. (May 1995) Thomas W. Ives, B. S. , The University of Texas... robot. Researchers at Texas A6tM University found that convergence can be achieved simply by converting the original translational parameters fiom millimeters to inches. While this is nice and convenient for this particular case, it does not prove...

Ives, Thomas W.

1995-01-01T23:59:59.000Z

278

Extreme Scale Visual Analytics  

SciTech Connect (OSTI)

Given the scale and complexity of today s data, visual analytics is rapidly becoming a necessity rather than an option for comprehensive exploratory analysis. In this paper, we provide an overview of three applications of visual analytics for addressing the challenges of analyzing climate, text streams, and biosurveilance data. These systems feature varying levels of interaction and high performance computing technology integration to permit exploratory analysis of large and complex data of global significance.

Steed, Chad A [ORNL] [ORNL; Potok, Thomas E [ORNL] [ORNL; Pullum, Laura L [ORNL] [ORNL; Ramanathan, Arvind [ORNL] [ORNL; Shipman, Galen M [ORNL] [ORNL; Thornton, Peter E [ORNL] [ORNL

2013-01-01T23:59:59.000Z

279

BENCH SCALE SALTSTONE PROCESS DEVELOPMENT MIXING STUDY  

SciTech Connect (OSTI)

The Savannah River National Laboratory (SRNL) was requested to develop a bench scale test facility, using a mixer, transfer pump, and transfer line to determine the impact of conveying the grout through the transfer lines to the vault on grout properties. Bench scale testing focused on the effect the transfer line has on the rheological property of the grout as it was processed through the transfer line. Rheological and other physical properties of grout samples were obtained prior to and after pumping through a transfer line. The Bench Scale Mixing Rig (BSMR) consisted of two mixing tanks, grout feed tank, transfer pump and transfer hose. The mixing tanks were used to batch the grout which was then transferred into the grout feed tank. The contents of the feed tank were then pumped through the transfer line (hose) using a progressive cavity pump. The grout flow rate and pump discharge pressure were monitored. Four sampling stations were located along the length of the transfer line at the 5, 105 and 205 feet past the transfer pump and at 305 feet, the discharge of the hose. Scaling between the full scale piping at Saltstone to bench scale testing at SRNL was performed by maintaining the same shear rate and total shear at the wall of the transfer line. The results of scaling down resulted in a shorter transfer line, a lower average velocity, the same transfer time and similar pressure drops. The condition of flow in the bench scale transfer line is laminar. The flow in the full scale pipe is in the transition region, but is more laminar than turbulent. The resulting plug in laminar flow in the bench scale results in a region of no-mixing. Hence mixing, or shearing, at the bench scale should be less than that observed in the full scale, where this plug is non existent due to the turbulent flow. The bench scale tests should be considered to be conservative due to the highly laminar condition of flow that exists. Two BSMR runs were performed. In both cases, wall shearing was shown to reduce the rheological properties of the grout as it was processed through the transfer line. Samples taken at the static feed tank showed that gelling impacted the rheological properties of the grout before it was fed into the pump and transfer line. A comparison of the rheological properties of samples taken at the feed tank and transfer line discharge indicated shearing of the grout was occurring in the transfer line. Bench scale testing of different mixing methods with three different salt solutions showed that method of mixing influences the rheological properties of the grouts. The paddle blade mixing method of the salt solution used for the BMSR testing provided comparable rheological properties of the grout prepared in the BMSR after 14 minutes of processing, B3. The paddle blade mixing method can be used to represent BMSR results and mixing time can be adjusted to represent larger scale mixing.

Cozzi, A.; Hansen, E.

2011-08-03T23:59:59.000Z

280

Developement of 3D Vertically Integrated Pattern Recognition Associative Memory (VIPRAM)  

SciTech Connect (OSTI)

Many next-generation physics experiments will be characterized by the collection of large quantities of data, taken in rapid succession, from which scientists will have to unravel the underlying physical processes. In most cases, large backgrounds will overwhelm the physics signal. Since the quantity of data that can be stored for later analysis is limited, real-time event selection is imperative to retain the interesting events while rejecting the background. Scaling of current technologies is unlikely to satisfy the scientific needs of future projects, so investments in transformational new technologies need to be made. For example, future particle physics experiments looking for rare processes will have to address the demanding challenges of fast pattern recognition in triggering as detector hit density becomes significantly higher due to the high luminosity required to produce the rare processes. In this proposal, we intend to develop hardware-based technology that significantly advances the state-of-the-art for fast pattern recognition within and outside HEP using the 3D vertical integration technology that has emerged recently in industry. The ultimate physics reach of the LHC experiments will crucially depend on the tracking trigger's ability to help discriminate between interesting rare events and the background. Hardware-based pattern recognition for fast triggering on particle tracks has been successfully used in high-energy physics experiments for some time. The CDF Silicon Vertex Trigger (SVT) at the Fermilab Tevatron is an excellent example. The method used there, developed in the 1990's, is based on algorithms that use a massively parallel associative memory architecture to identify patterns efficiently at high speed. However, due to much higher occupancy and event rates at the LHC, and the fact that the LHC detectors have a much larger number of channels in their tracking detectors, there is an enormous challenge in implementing pattern recognition for a track trigger, requiring about three orders of magnitude more associative memory patterns than what was used in the original CDF SVT. Significant improvement in the architecture of associative memory structures is needed to run fast pattern recognition algorithms of this scale. We are proposing the development of 3D integrated circuit technology as a way to implement new associative memory structures for fast pattern recognition applications. Adding a 'third' dimension to the signal processing chain, as compared to the two-dimensional nature of printed circuit boards, Field Programmable Gate Arrays (FPGAs), etc., opens up the possibility for new architectures that could dramatically enhance pattern recognition capability. We are currently performing preliminary design work to demonstrate the feasibility of this approach. In this proposal, we seek to develop the design and perform the ASIC engineering necessary to realize a prototype device. While our focus here is on the Energy Frontier (e.g. the LHC), the approach may have applications in experiments in the Intensity Frontier and the Cosmic Frontier as well as other scientific and medical projects. In fact, the technique that we are proposing is very generic and could have wide applications far beyond track trigger, both within and outside HEP.

Deputch, G.; Hoff, J.; Lipton, R.; Liu, T.; Olsen, J.; Ramberg, E.; Wu, Jin-Yuan; Yarema, R.; /Fermilab; Shochet, M.; Tang, F.; /Chicago U.; Demarteau, M.; /Argonne /INFN, Padova

2011-04-13T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Multi-Summer Climatology of Cumuli at SGP site: Vertical Structure  

SciTech Connect (OSTI)

We perform a case study for estimating the impact of the vertical distribution of cloud fraction on the normalized cloud radiative forcing (CRF) using a decade-long (2000-2009) high resolution dataset of cloud macrophysical and radiative properties. This dataset is developed for fair-weather cumuli (FWC) observed at the U.S. Department of Energy's Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site. The design of the case study reduces effects associated with non-cloud factors, such as the diurnal changes of aerosol loading and solar zenith angle. The results of the case study suggest that the impact of the vertical cloud structure can be substantial. Therefore, taking into account the vertical distribution of clouds would be beneficial for more comprehensive parameterizations aimed to portray the complex interactions between clouds and radiation more accurately

Kassianov, Evgueni I.; Berg, Larry K.

2011-10-01T23:59:59.000Z

282

Electron-electron interaction, weak localization and spin valve effect in vertical-transport graphene devices  

SciTech Connect (OSTI)

We fabricated a vertical structure device, in which graphene is sandwiched between two asymmetric ferromagnetic electrodes. The measurements of electron and spin transport were performed across the combined channels containing the vertical and horizontal components. The presence of electron-electron interaction (EEI) was found not only at low temperatures but also at moderate temperatures up to ?120?K, and EEI dominates over weak localization (WL) with and without applying magnetic fields perpendicular to the sample plane. Moreover, spin valve effect was observed when magnetic filed is swept at the direction parallel to the sample surface. We attribute the EEI and WL surviving at a relatively high temperature to the effective suppress of phonon scattering in the vertical device structure. The findings open a way for studying quantum correlation at relatively high temperature.

Long, Mingsheng; Gong, Youpin; Wei, Xiangfei; Zhu, Chao; Xu, Jianbao; Liu, Ping; Guo, Yufen; Li, Weiwei; Liu, Liwei, E-mail: lwliu2007@sinano.ac.cn [Key Laboratory of Nanodevices and Applications-CAS and Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123 (China); Liu, Guangtong [Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)

2014-04-14T23:59:59.000Z

283

Cloud-Scale Datacenters Page 1 Cloud-Scale  

E-Print Network [OSTI]

Cloud-Scale Datacenters Page 1 Cloud-Scale Datacenters #12;Cloud-Scale Datacenters Page 2, and operating datacenters. When software applications are built as distributed systems, every aspect brief will explore how cloud workloads have changed the way datacenters are designed and operated

Chaudhuri, Surajit

284

First Observation Of ELM Pacing With Vertical Jogs In A Spherical Torus  

SciTech Connect (OSTI)

Experiments in a number of conventional aspect ratio tokamaks have been successful in pacing edge localized modes (ELMs) by rapid vertical jogging of the plasma. This paper demonstrates the first pacing of ELMs in a spherical torus plasma. Applied 30 Hz vertical jogs synchronized the ELMs with the upward motion of the plasma. 45 Hz jogs also lead to an increase in the ELM frequency, though the synchronization of the ELMs and jogs was unclear. A reduction in the ELM energy was observed at the higher driven ELM frequencies. __________________________________________________

Gerhardt, S P; Canik, J M; Maingi, R; Bell, R; Gates, d; Goldston, R; Hawryluk, R; Le Blanc, B P; Menard, J; Sontag, A C; Sabbagh, S

2010-07-15T23:59:59.000Z

285

Can the vertical motions in the eyewall of tropical cyclones support persistent UAV flight?  

E-Print Network [OSTI]

Powered flights in the form of manned or unmanned aerial vehicles (UAVs) have been flying into tropical cyclones to obtain vital atmospheric measurements with flight duration typically lasting between 12 and 36 hours. Convective vertical motion properties of tropical cyclones have previously been studied. This work investigates the possibility to achieve persistent flight by harnessing the generally pervasive updrafts in the eyewall of tropical cyclones. A sailplane UAV capable of vertical take-off and landing (VTOL) is proposed and its flight characteristics simulated. Results suggest that the concept of persistent flight within the eyewall is promising and may be extendable to the rainband regions.

Poh, Chung-Kiak

2014-01-01T23:59:59.000Z

286

1D-1D tunneling between vertically coupled GaAs/AlGaAs quantum wires.  

SciTech Connect (OSTI)

We report low-dimensional transport and tunneling in an independently contacted vertically coupled quantum wire system, with a 7.5 nm barrier between the wires. The derivative of the linear conductance shows evidence for both single wire occupation and coupling between the wires. This provides a map of the subband occupation that illustrates the control that we have over the vertically coupled double quantum wires. Preliminary tunneling results indicate a sharp 1D-1D peak in conjunction with a broad 2D-2D background signal. This 1D-1D peak is sensitively dependent on the top and bottom split gate voltage.

Seamons, John Andrew; Lilly, Michael Patrick; Reno, John Louis; Bielejec, Edward Salvador

2004-07-01T23:59:59.000Z

287

A study of winter precipitation areas in relation to several indicators of vertical motion  

E-Print Network [OSTI]

is moving over sloping terrain obtains an induced vertical component of velocity. The magnitude of t' he vertical com- ponent is directly related to the wind speed near the ground and to the angle of inclination of the slope in the direction of flow...) Relative Humidity: Values at 25-mb intervals were obtained by interpolation of data given at the contact points. A 107. rms error is likely in the data. The error would appear also in dew- point temperatures which were provided on the tape. 5) Wind...

Fuelberg, Henry Ernest

2012-06-07T23:59:59.000Z

288

Vertical extent and dilution of dense jets emanating from a submerged multiport diffuser  

E-Print Network [OSTI]

. The downstream distance of the peak was found to be (7) thus making the vertical extent Z ? (3/Bal ) t l/0) (P4 /g ) t 1/3) b (8) Fram experiments on buoyant jets, the entrainment coefficient a was determined to be equal to 0. 5 by Chu and Goldberg (4) thus... an analytical solution for a dense vertical jet using Chu and Goldberg's (4) entrainment theory mentioned earlier. The minimum dilution occurred in the center of the vortice pairs and the path of the descending plume was described by 2Z ? (2Z ? z)' = (3/4a...

McLellan, Thomas Neil

2012-06-07T23:59:59.000Z

289

Beam steering via resonance detuning in coherently coupled vertical cavity laser arrays  

SciTech Connect (OSTI)

Coherently coupled vertical-cavity surface-emitting laser arrays offer unique advantages for nonmechanical beam steering applications. We have applied dynamic coupled mode theory to show that the observed temporal phase shift between vertical-cavity surface-emitting array elements is caused by the detuning of their resonant wavelengths. Hence, a complete theoretical connection between the differential current injection into array elements and the beam steering direction has been established. It is found to be a fundamentally unique beam-steering mechanism with distinct advantages in efficiency, compactness, speed, and phase-sensitivity to current.

Johnson, Matthew T., E-mail: matthew.johnson.9@us.af.mil; Siriani, Dominic F.; Peun Tan, Meng; Choquette, Kent D. [Department of Electrical and Computer Engineering University of Illinois, Urbana, Illinois 61820 (United States)] [Department of Electrical and Computer Engineering University of Illinois, Urbana, Illinois 61820 (United States)

2013-11-11T23:59:59.000Z

290

The effect of distributors on two-phase and three-phase flows in vertical columns  

E-Print Network [OSTI]

and spray-annular flow patterns were observed for the cocurrent vertical upward flow of air and water in a 5. 40 cm. I. D. tube. This could, be explained by the high gas-liquid flux ratio. Taitel et al. (48) developed some flow pattern transi- tion... criterion for vertical gas-liquid flows (bubble, slug, churn and annular flows) based on physical mechanisms suggested f' or each transition. They claimed that these models were free from the limitations of empirically based transition maps...

Ouyang, Chie-Jan Paul

1982-01-01T23:59:59.000Z

291

The San Jose Scale.  

E-Print Network [OSTI]

for controlling the scale. The most important spray mixtures in use are lime-sulphur salt, lime-sulphur, whale oil soap, kero? sene, crude petroleum, Kero-water, and kerosene or crude oil emulsions. All these preparations are mainly winter sprays, being applied... applied while cold, however, it clogs the apparatus and causes considerable inconven? ience in getting it on the tree. It is more expensive than the Lime- Sulphur wash. i I o . B I 3 I 2 In some States coal oil or kerosene has been experimented...

Conradi, Albert F.

1906-01-01T23:59:59.000Z

292

ATLAS Jet Energy Scale  

E-Print Network [OSTI]

Jets originating from the fragmentation of quarks and gluons are the most common, and complicated, final state objects produced at hadron colliders. A precise knowledge of their energy calibration is therefore of great importance at experiments at the Large Hadron Collider at CERN, while is very difficult to ascertain. We present in-situ techniques and results for the jet energy scale at ATLAS using recent collision data. ATLAS has demonstrated an understanding of the necessary jet energy corrections to within \\approx 4% in the central region of the calorimeter.

D. Schouten; A. Tanasijczuk; M. Vetterli; for the ATLAS Collaboration

2012-01-11T23:59:59.000Z

293

Pore Scale Micromodels | EMSL  

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 May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar Home Design Passive SolarCenterYou areConstructionAPore Scale

294

Silica Scaling Removal Process  

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 systemsBi (2)Sharing Smart GridShift EndSidneyChemistry » Silica Scaling

295

FAST Code Verification of Scaling Laws for DeepCwind Floating Wind System Tests: Preprint  

SciTech Connect (OSTI)

This paper investigates scaling laws that were adopted for the DeepCwind project for testing three different floating wind systems at 1/50 scale in a wave tank under combined wind and wave loading.

Jain, A.; Robertson, A. N.; Jonkman, J. M.; Goupee, A. J.; Kimball, R. W.; Swift, A. H. P.

2012-04-01T23:59:59.000Z

296

Heat and Mass Transfer in Fires: Scaling Laws and their Application   

E-Print Network [OSTI]

Fire is a phenomenon that covers a multiplicity of scales depending on the different processes involved. Length scales range from the nanometres when addressing material flammability to the kilometres when dealing with ...

Torero, Jose L

297

Design, fabrication and mechanical optimization of multi-scale anisotropic feet for terrestrial locomotion  

E-Print Network [OSTI]

Multi-scale surface interaction methods have been studied to achieve optimal locomotion over surface features of differing length scales. It has been shown that anisotropy is a convenient way of transferring an undirected ...

Morin, Jeffrey W. (Jeffrey William)

2011-01-01T23:59:59.000Z

298

Multi-Body Unsteady Aerodynamics in 2D Applied to aVertical-Axis Wind Turbine Using a Vortex Method.  

E-Print Network [OSTI]

?? Vertical axis wind turbines (VAWT) have many advantages over traditional Horizontalaxis wind turbines (HAWT).One of the more severe problem of VAWTs are the complicated… (more)

Österberg, David

2010-01-01T23:59:59.000Z

299

Low threshold vertical cavity surface emitting lasers integrated onto Si-CMOS ICs using novel hybrid assembly techniques  

E-Print Network [OSTI]

A new heterogeneous integration technique has been developed and demonstrated to integrate vertical cavity surface emitting lasers (VCSELs) on silicon CMOS integrated circuits for optical interconnect applications. Individual ...

Perkins, James Michael, 1978-

2007-01-01T23:59:59.000Z

300

Empirical Evidence on the Role of Non Linear Wholesale Pricing and Vertical Restraints on Cost Pass-Through  

E-Print Network [OSTI]

Welfare E?ects of Banning Wholesale Price Discrimination,”non linear contracts when wholesale price discrimination ison the role of non- linear wholesale pricing and vertical

Celine, Bonnet; Dubois, Pierre; Villas-Boas, Sofia B.

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Vertical composition gradient effects on original hydrocarbon in place volumes and liquid recovery for volatile oil and gas condensate reservoirs.  

E-Print Network [OSTI]

??Around the world, volatile oil and retrograde gas reservoirs are considered as complex thermodynamic systems and even more when they exhibit vertical composition variations. Those… (more)

Jaramillo Arias, Juan Manuel

2012-01-01T23:59:59.000Z

302

LUCI: A facility at DUSEL for large-scale experimental study of geologic carbon sequestration  

SciTech Connect (OSTI)

LUCI, the Laboratory for Underground CO{sub 2} Investigations, is an experimental facility being planned for the DUSEL underground laboratory in South Dakota, USA. It is designed to study vertical flow of CO{sub 2} in porous media over length scales representative of leakage scenarios in geologic carbon sequestration. The plan for LUCI is a set of three vertical column pressure vessels, each of which is {approx}500 m long and {approx}1 m in diameter. The vessels will be filled with brine and sand or sedimentary rock. Each vessel will have an inner column to simulate a well for deployment of down-hole logging tools. The experiments are configured to simulate CO{sub 2} leakage by releasing CO{sub 2} into the bottoms of the columns. The scale of the LUCI facility will permit measurements to study CO{sub 2} flow over pressure and temperature variations that span supercritical to subcritical gas conditions. It will enable observation or inference of a variety of relevant processes such as buoyancy-driven flow in porous media, Joule-Thomson cooling, thermal exchange, viscous fingering, residual trapping, and CO{sub 2} dissolution. Experiments are also planned for reactive flow of CO{sub 2} and acidified brines in caprock sediments and well cements, and for CO{sub 2}-enhanced methanogenesis in organic-rich shales. A comprehensive suite of geophysical logging instruments will be deployed to monitor experimental conditions as well as provide data to quantify vertical resolution of sensor technologies. The experimental observations from LUCI will generate fundamental new understanding of the processes governing CO{sub 2} trapping and vertical migration, and will provide valuable data to calibrate and validate large-scale model simulations.

Peters, C. A.; Dobson, P.F.; Oldenburg, C.M.; Wang, J. S. Y.; Onstott, T.C.; Scherer, G.W.; Freifeld, B.M.; Ramakrishnan, T.S.; Stabinski, E.L.; Liang, K.; Verma, S.

2010-10-01T23:59:59.000Z

303

An alternative scaling solution for high-energy QCD saturation with running coupling  

E-Print Network [OSTI]

A new type of approximate scaling compatible with the Balitsky-Kovchegov equation with running coupling is found, which is different from the previously known running coupling geometric scaling. The corresponding asymptotic traveling wave solution is derived. Although featuring different scaling behaviors, the two solutions are complementary approximations of the same universal solution, and they become equivalent in the high energy limit. The new type of scaling is observed in the small-x DIS data.

Guillaume Beuf

2008-03-14T23:59:59.000Z

304

Double-Difference Tomography for Sequestration MVA  

SciTech Connect (OSTI)

Analysis of synthetic data was performed to determine the most cost-effective tomographic monitoring system for a geologic carbon sequestration injection site. Double-difference tomographic inversion was performed on 125 synthetic data sets: five stages of CO2 plume growth, five seismic event regions, and five geophone arrays. Each resulting velocity model was compared quantitatively to its respective synthetic velocity model to determine an accuracy value. The results were examined to determine a relationship between cost and accuracy in monitoring, verification, and accounting applications using double-difference tomography. The geophone arrays with widely-varying geophone locations, both laterally and vertically, performed best. Additionally, double difference seismic tomography was performed using travel time data from a carbon sequestration site at the Aneth oil field in southeast Utah as part of a Department of Energy initiative on monitoring, verification, and accounting (MVA) of sequestered CO2. A total of 1,211 seismic events were recorded from a borehole array consisting of 22 geophones. Artificial velocity models were created to determine the ease with which different CO2 plume locations and sizes can be detected. Most likely because of the poor geophone arrangement, a low velocity zone in the Desert Creek reservoir can only be detected when regions of test site containing the highest ray path coverage are considered. MVA accuracy and precision may be improved through the use of a receiver array that provides more comprehensive ray path coverage.

Westman, Erik

2008-12-31T23:59:59.000Z

305

The vertical voltage termination technique characterizations of single die multiple 600V power  

E-Print Network [OSTI]

The vertical voltage termination technique ­ characterizations of single die multiple 600V power.grenoble-inp.fr Abstract-- Deep trench terminations are commonly known as a technique to achieve ideal breakdown voltages for high voltage devices. This paper presents the use of deep trench terminations as an original concept

Paris-Sud XI, Université de

306

Design and analysis of a 5-MW vertical-fluted-tube condenser for geothermal applications  

SciTech Connect (OSTI)

The design and analysis of an industtial-sized vertical-fluted-tube condenser. The condenser is used to condense superheated isobutane vapor discharged from a power turbine in a geothermal test facility operated for the US Department of Energy. The 5-MW condenser has 1150 coolant tubes in a four-pass configuration with a total heat transfer area of 725 m/sup 2/ (7800 ft/sup 2/). The unit is being tested at the Geothermal Components Test Facility in the Imperial Valley of East Mesa, California. The condenser design is based on previous experimental research work done at the Oak Ridge National Laboratory on condensing refrigerants on a wide variety of single vertical tubes. Condensing film coefficients obtained on the high-performance vertical fluted tubes in condensing refrigerants are as much as seven times greater than those obtained with vertical smooth tubes that have the same diameter and length. The overall heat transfer performance expected from the fluted tube condenser is four to five times the heat transfer obtained from the identical units employing smooth tubes. Fluted tube condensers also have other direct applications in the Ocean Thermal Energy Conversion (OTEC) program in condensing ammonia, in the petroleum industry in condensing light hydrocarbons, and in the air conditioning and refrigeration industry in condensing fluorocarbon vapors.

Llewellyn, G.H.

1982-03-01T23:59:59.000Z

307

Patterned Growth of Vertically Aligned SWNTs through Liquid-based Catalyst Manipulation  

E-Print Network [OSTI]

-assembled monolayer (SAM) and then selectively removing the SAM by ultraviolet (UV) light, the catalyst can be dip the fabrication procedure of hydrophilic/hydrophobic patterns using a selective removal of OTS SAM by UV exposure; (b) SEM images of random and vertically aligned SWNT line-shape patterns. *Email address: maruyama

Maruyama, Shigeo

308

MODELLING THE VERTICAL WIND SPEED AND TURBULENCE INTENSITY PROFILES AT PROSPECTIVE OFFSHORE WIND FARM SITES  

E-Print Network [OSTI]

MODELLING THE VERTICAL WIND SPEED AND TURBULENCE INTENSITY PROFILES AT PROSPECTIVE OFFSHORE WIND for conditions important for offshore wind energy utilisation are compared and tested: Four models tested with data from the offshore field measurement Rødsand by extrapolating the measured 10 m wind

Heinemann, Detlev

309

EVALUATION OF MODELS FOR THE VERTICAL EXTRAPOLATION OF WIND SPEED MEASUREMENTS AT OFFSHORE SITES  

E-Print Network [OSTI]

EVALUATION OF MODELS FOR THE VERTICAL EXTRAPOLATION OF WIND SPEED MEASUREMENTS AT OFFSHORE SITES important for offshore wind energy utilisation are discussed and tested: Four models for the surface tested with data from the offshore field measurement Rødsand by extrapolating the measured 10 m wind

Heinemann, Detlev

310

EVALUATION OF MODELS FOR THE VERTICAL EXTRAPOLATION OF WIND SPEED MEASUREMENTS AT OFFSHORE SITES  

E-Print Network [OSTI]

EVALUATION OF MODELS FOR THE VERTICAL EXTRAPOLATION OF WIND SPEED MEASUREMENTS AT OFFSHORE SITES important for offshore wind energy utilisation are discussed and tested: Four models for the surface tested with measurements from the offshore field measurement Rødsand by extrapolating the measured 10 m

Heinemann, Detlev

311

MODELLING THE VERTICAL WIND SPEED AND TURBULENCE INTENSITY PROFILES AT PROSPECTIVE OFFSHORE WIND FARM SITES  

E-Print Network [OSTI]

MODELLING THE VERTICAL WIND SPEED AND TURBULENCE INTENSITY PROFILES AT PROSPECTIVE OFFSHORE WIND important for offshore wind energy utilisation are discussed and tested: Four models for the surface tested with data from the offshore field measurement Rødsand by extrapolating the measured 10 m wind

Heinemann, Detlev

312

An analysis of the impact of vertical integration on the Texas Hog industry  

E-Print Network [OSTI]

in a vertically integrateu program if their sole purpose is to obtain additiona holp with management !, roblcms~ 'oecause most of 1+0 Ibid, Sile inm~m~ fixes au mt ino1uds usus?"eront. soar oss @mt, srs nat R Ini1stia roe o?nor Jo~ss Quail ss o...

McClure, Robert Harold

2012-06-07T23:59:59.000Z

313

GEOLOGY, July 2008 539 The origin of the vertical motions of East Greenland is a long-  

E-Print Network [OSTI]

GEOLOGY, July 2008 539 ABSTRACT The origin of the vertical motions of East Greenland is a long uplift in central East Greenland. Because the North Atlantic is rimmed by young glacially carved mountain, Greenland, numerical modeling. INTRODUCTION The coastal landscapes of the fjords of the North Atlantic Ocean

Podladchikov, Yuri

314

Vertical Heat Transport by Ocean Circulation and the Role of Mechanical and Haline Forcing  

E-Print Network [OSTI]

suggest that heat can be pumped downward by the upper limb of the meridional overturning circulation the earth's climate, with the upper 2.5 m of the ocean able to store as much heat as the entire atmosphereVertical Heat Transport by Ocean Circulation and the Role of Mechanical and Haline Forcing JAN D

England, Matthew

315

Highly Ordered Vertical Silicon Nanowire Array Composite Thin Films for Thermoelectric Devices  

E-Print Network [OSTI]

Highly Ordered Vertical Silicon Nanowire Array Composite Thin Films for Thermoelectric Devices for thermoelectric devices are presented. Inter- ference lithography was used to pattern square lattice photoresist. The Si NW arrays were embedded in SOG to form a dense and robust composite material for device

Bowers, John

316

Mode-Locked Fiber Lasers Using Adjustable Saturable Absorption in Vertically Aligned Carbon Nanotubes  

E-Print Network [OSTI]

Mode-Locked Fiber Lasers Using Adjustable Saturable Absorption in Vertically Aligned Carbon, carbon nanotube Passively mode-locked fiber lasers have been used in many applications in various fields or the cleaved fiber end.5) In these studies, we used single-walled carbon nanotubes (SWNTs) whose axial

Maruyama, Shigeo

317

Coriolis Effect on Dynamic Stall in a Vertical Axis Wind Turbine at Moderate Reynolds Number  

E-Print Network [OSTI]

axis wind turbines (VAWT) offer several advantages over horizontal axis wind turbines (HAWT), namely to yaw wind direction (because they are omnidirectional), and their increased power output in skewed flowCoriolis Effect on Dynamic Stall in a Vertical Axis Wind Turbine at Moderate Reynolds Number Hsieh

Colonius, Tim

318

On the vertical structure of adiabatic wave forcing for the ocean circulation  

E-Print Network [OSTI]

: wave-current coupling, radiation stresses, MARS3D, WAVEWATCH III Three-dimensional oceanic flows canOn the vertical structure of adiabatic wave forcing for the ocean circulation Part I: Theory submitted to Ocean Modelling October 5, 2010 hal-00523388,version2-5Oct2010 #12;can be developed. Keywords

319

Vertical Single Carbon Nanotube Devices and Arrays Wednesday April 1, 2009  

E-Print Network [OSTI]

Vertical Single Carbon Nanotube Devices and Arrays Wednesday April 1, 2009 Babbio 122, 11 am There has been a great deal of research and development interest in using single wall carbon nanotubes (SWNT for verification of new designs and for model loop closure, tracked lot-processing performance at the wafer level

Fisher, Frank

320

The origin of steep vertical stellar distribution in the Galactic disk  

E-Print Network [OSTI]

Over the past two decades observations have revealed that the vertical density distribution of stars in galaxies near the mid-plane is substantially steeper than the sech^2 function that is expected from an isothermal approximation. However, the physical origin for this has not been explained so far. Here we show that such steep profiles result naturally even within the isothermal regime, on taking into account the gravitational force due to the gas. Due to its low velocity dispersion the gas is concentrated closer to the galactic mid-plane than the stars, and hence it strongly affects the vertical stellar distribution even though its contribution to the total surface density is small. We apply a three-component galactic disk model consisting of gravitationally coupled stars and the HI and H_2 gas, embedded in the dark matter halo, and calculate the vertical density distribution of stars for the Galaxy. The resulting vertical density distribution of stars is shown to be steeper than the sech^2 function, and lies between the sech and an exponential function, in good agreement with observations of galaxies. We also show that a multi-component stellar disk consisting of coupled dwarfs and two populations of giants does not explain the observed steep stellar profiles.

Arunima Banerjee; Chanda J. Jog

2007-03-08T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Test plan for the 34 meter vertical axis wind turbine test bed located at Bushland, Texas  

SciTech Connect (OSTI)

A plan is presented for the testing and evaluation of a new 500 kw vertical axis wind turbine test bed. The plan starts with the initial measurements made during construction, proceeds through evaluation of the design, the development of control methods, and finally to the test bed phase where new concepts are evaluated and in-depth studies are performed.

Stephenson, W.A.

1986-12-01T23:59:59.000Z

322

Compact fluorescent lamp using horizontal and vertical insulating septums and convective venting geometry  

DOE Patents [OSTI]

A novel design is described for a compact fluorescent lamp, including a lamp geometry which will increase light output and efficacy of the lamp in a base down operating position by providing horizontal and vertical insulating septums positioned in the ballast compartment of the lamp to provide a cooler coldspot. Selective convective venting provides additional cooling of the ballast compartment. 9 figs.

Siminovitch, M.

1998-02-10T23:59:59.000Z

323

Role of algal aggregation in vertical carbon export during SOIREE and in other low biomass environments  

E-Print Network [OSTI]

Role of algal aggregation in vertical carbon export during SOIREE and in other low biomass induced an increase in phytoplankton biomass, but do not necessarily trigger increases in carbon export particles via coagulation. We demonstrate that in low biomass regions, where concentrations do not reach

Jackson, George

324

Analysis of wellbore instability in vertical, directional, and horizontal wells using field data  

E-Print Network [OSTI]

Analysis of wellbore instability in vertical, directional, and horizontal wells using field data M.A-mail addresses: mamuddin@kfupm.edu.sa (M.A. Mohiuddin), aazeez@kfupm.edu.sa (A. Abdulraheem). 0920-4105/$ - see. Mohiuddin, K. Khan, A. Abdulraheem , A. Al-Majed, M.R. Awal Center for Petroleum and Minerals, Research

Al-Majed, Abdulaziz Abdullah

325

Production of vertical arrays of small diameter single-walled carbon nanotubes  

DOE Patents [OSTI]

A hot filament chemical vapor deposition method has been developed to grow at least one vertical single-walled carbon nanotube (SWNT). In general, various embodiments of the present invention disclose novel processes for growing and/or producing enhanced nanotube carpets with decreased diameters as compared to the prior art.

Hauge, Robert H; Xu, Ya-Qiong

2013-08-13T23:59:59.000Z

326

RATE SENSITIVITY OF PLASTIC FLOW AND IMPLICATIONS FOR YIELD-SURFACE VERTICES  

E-Print Network [OSTI]

RATE SENSITIVITY OF PLASTIC FLOW AND IMPLICATIONS FOR YIELD-SURFACE VERTICES Jwo PAN Stress; in recked form 29 Norember 1982) &tract-When crystalline slip is considered as the micromechanism of plastic sensitivity of plastic flow may be central to understanding the ambiguous conclusions from experimental

327

Bond Graph Model of a Vertical U-Tube Steam Condenser Coupled with a Heat Exchanger  

E-Print Network [OSTI]

level. Steam condensers are integral part of any nuclear and thermal power plant utilising steam A simulation model for a vertical U-tube steam condenser in which the condensate is stored at the bottom well and thus the bottom well acts as a heat exchanger. The storage of hydraulic and thermal energies

Paris-Sud XI, Université de

328

Friction of partially embedded vertically aligned carbon nanofibers inside Burak Aksak and Metin Sittia  

E-Print Network [OSTI]

Friction of partially embedded vertically aligned carbon nanofibers inside elastomers Burak Aksak partially embedded inside polyurethane eVACNFs are proposed as a robust high friction fibrillar material and selective oxygen plasma etching, fibers are partially released up to 5 m length. Macroscale friction

Goldstein, Seth Copen

329

Growth of vertically aligned ZnO nanowalls for inverted polymer solar cells  

E-Print Network [OSTI]

Growth of vertically aligned ZnO nanowalls for inverted polymer solar cells Zhiqiang Liang a,n a School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China b May 2013 Keywords: Inverted polymer solar cells Zinc oxide Nanowalls Aqueous solution growth a b s t r

Cao, Guozhong

330

Identification and control of plasma vertical position using neural network in Damavand tokamak  

SciTech Connect (OSTI)

In this work, a nonlinear model is introduced to determine the vertical position of the plasma column in Damavand tokamak. Using this model as a simulator, a nonlinear neural network controller has been designed. In the first stage, the electronic drive and sensory circuits of Damavand tokamak are modified. These circuits can control the vertical position of the plasma column inside the vacuum vessel. Since the vertical position of plasma is an unstable parameter, a direct closed loop system identification algorithm is performed. In the second stage, a nonlinear model is identified for plasma vertical position, based on the multilayer perceptron (MLP) neural network (NN) structure. Estimation of simulator parameters has been performed by back-propagation error algorithm using Levenberg-Marquardt gradient descent optimization technique. The model is verified through simulation of the whole closed loop system using both simulator and actual plant in similar conditions. As the final stage, a MLP neural network controller is designed for simulator model. In the last step, online training is performed to tune the controller parameters. Simulation results justify using of the NN controller for the actual plant.

Rasouli, H. [School of Plasma Physics and Nuclear Fusion, Institute of Nuclear Science and Technology, AEOI, P.O. Box 14155-1339, Tehran (Iran, Islamic Republic of); Advanced Process Automation and Control (APAC) Research Group, Faculty of Electrical Engineering, K.N. Toosi University of Technology, P.O. Box 16315-1355, Tehran (Iran, Islamic Republic of); Rasouli, C.; Koohi, A. [School of Plasma Physics and Nuclear Fusion, Institute of Nuclear Science and Technology, AEOI, P.O. Box 14155-1339, Tehran (Iran, Islamic Republic of)

2013-02-15T23:59:59.000Z

331

Vertical Pillar-Superlattice Array and Graphene Hybrid Light Emitting Diodes  

E-Print Network [OSTI]

Vertical Pillar-Superlattice Array and Graphene Hybrid Light Emitting Diodes Jung Min Lee, Jae a class of light emitting diode (LED) with interesting mechanical, optical, and electrical characteristics, light-emitting diodes, 3D architectures, transparent electrodes V ertical arrays of one-dimensional (1D

Rogers, John A.

332

Vertical transport and dynamic size distribution of New Bedford Harbor sediments  

E-Print Network [OSTI]

Superfund Site. Samples were analyzed on a Coulter Counter, AVC-80 Suspended Solids machine, and a HACH Model 2100A Turbidimeter. A vertical transport model, which included flocculation and flo breakup, was developed and calibrated with these laboratory... Column. . . . . . . . . . . . . . . . . . . . . . . . Electronic Particle Counter. . . Suspended Solids and Turbidity . . . Density Meter Experimental Procedures. . . . . . . . . . . . . . . . . . . . . . . Data Analysis. 28 31 32 34 35 35 36...

Sanders, Stephanie Carol

1990-01-01T23:59:59.000Z

333

Page 1 of 21 Vertical integration in a growing industry: security of supply  

E-Print Network [OSTI]

Electricity Policy Research Group, Judge Business School University of Cambridge Abstract The global decade. We focus on the top 30 global manufacturers and 10 additional regional/national firms: Bio-ethanol, Biofuel, Ethanol, Governance, Industry evolution, Value Chain, Vertical Integration 1

Aickelin, Uwe

334

Vertical Integration in a Growing Industry: Security of Supply and Market Access in  

E-Print Network [OSTI]

of top 30 global + 10 regional ethanol manufacturers Results: Waves of consolidation and vertical biofuels for road transport Bio-diesel : vegetable oil based substitute for diesel Bio-ethanol : alcohol of history (in Brazil) but global rolled out began in early 2000. 1st generation technology is rather mature

Aickelin, Uwe

335

A one-dimensional model of vertical gas plume migration through a heterogeneous porous medium  

E-Print Network [OSTI]

A one-dimensional model of vertical gas plume migration through a heterogeneous porous medium and consequent global warming. Ideally, the injected greenhouse gas stays in the injection zone for a geologic or inadvertently created conduits in the cap rock may result in a gas leakage from primary storage. Even

Patzek, Tadeusz W.

336

Diameter-Controlled and Nitrogen-Doped Vertically Aligned Single-Walled Carbon Theerapol Thurakitsereea  

E-Print Network [OSTI]

controlled and vertically aligned single-walled carbon nanotubes were synthesized from pure and mixed ethanol/acetonitrile feedstock. With increasing acetonitrile concentration in the feedstock, nitrogen incorporation into the sp2], methane [8], acetylene [9], ethylene [10], or other organic chemical sources [11]. Acetonitrile (CH3CN

Maruyama, Shigeo

337

Near-wall modeling of an isothermal vertical wall using one-dimensional turbulence  

E-Print Network [OSTI]

[5]. The challenge in modeling this class of flows is the coupling between the heat transfer approaches are considered for describing the heat transfer from a vertical isothermal wall. In this approach at the wall surface and the generation of turbulence from buoyancy forces, which in turn, affect

DesJardin, Paul E.

338

UNIVERSITY OF CALIFORNIA, Effects of Vertically-Resolved Solar Heating, Snow Aging, and Black  

E-Print Network [OSTI]

UNIVERSITY OF CALIFORNIA, IRVINE Effects of Vertically-Resolved Solar Heating, Snow Aging formats: Committee Chair University of California, Irvine 2007 ii #12;To my parents, John and Cindy. iii, albedo, snow grain size, and absorbing impurities. . 8 2.1 Solar absorption profiles prescribed by CLM

Zender, Charles

339

Inferring Propagation Direction of Nonlinear Internal Waves in a Vertically Sheared Background Flow  

E-Print Network [OSTI]

Inferring Propagation Direction of Nonlinear Internal Waves in a Vertically Sheared Background Flow are resistant to heaving. The beamwise method provides accurate predictions of wave propagation angle for cases 2005). Determining the wave propagation di- rection, so that one may in turn identify potential lo

Kelley, Dan

340

Neuro-fuzzy control of vertical vibrations in railcars using magnetorheological dampers  

E-Print Network [OSTI]

Control of vertical vibrations in a railcar is a critical issue that has been addressed by many researchers in the past. This thesis presents a new approach to solving the problem by using a semi-active viscous damper in tandem with a neuro...

Atray, Vipul Sunil

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Multi-Fidelity Uncertainty Quantification: Application to a Vertical Axis Wind Turbine Under an  

E-Print Network [OSTI]

. Introduction Quantifying the response of a wind turbine to an extreme wind gust is an important designMulti-Fidelity Uncertainty Quantification: Application to a Vertical Axis Wind Turbine Under an Extreme Gust A. Santiago Padr´on , Juan J. Alonso and Francisco Palacios Stanford University, Stanford, CA

Alonso, Juan J.

342

Strain relaxation and enhanced perpendicular magnetic anisotropy in BiFeO{sub 3}:CoFe{sub 2}O{sub 4} vertically aligned nanocomposite thin films  

SciTech Connect (OSTI)

Self-assembled BiFeO{sub 3}:CoFe{sub 2}O{sub 4} (BFO:CFO) vertically aligned nanocomposite thin films have been fabricated on SrTiO{sub 3} (001) substrates using pulsed laser deposition. The strain relaxation mechanism between BFO and CFO with a large lattice mismatch has been studied by X-ray diffraction and transmission electron microscopy. The as-prepared nanocomposite films exhibit enhanced perpendicular magnetic anisotropy as the BFO composition increases. Different anisotropy sources have been investigated, suggesting that spin-flop coupling between antiferromagnetic BFO and ferrimagnetic CFO plays a dominant role in enhancing the uniaxial magnetic anisotropy.

Zhang, Wenrui; Jiao, Liang; Li, Leigang [Department of Materials Science and Engineering, Texas A and M University, College Station, Texas 77843 (United States); Jian, Jie; Khatkhatay, Fauzia; Chu, Frank [Department of Electrical and Computer Engineering, Texas A and M University, College Station, Texas 77843 (United States); Chen, Aiping [Department of Electrical and Computer Engineering, Texas A and M University, College Station, Texas 77843 (United States); Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Jia, Quanxi [Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); MacManus-Driscoll, Judith L. [Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ (United Kingdom); Wang, Haiyan, E-mail: wangh@ece.tamu.edu [Department of Materials Science and Engineering, Texas A and M University, College Station, Texas 77843 (United States); Department of Electrical and Computer Engineering, Texas A and M University, College Station, Texas 77843 (United States)

2014-02-10T23:59:59.000Z

343

The design of an air sampling system using the High-Volume Inertial Sampler: and a comparison of the system to the Vertical Elutriator  

E-Print Network [OSTI]

-restricting valve were added to the sampling element. A field test was conducted at a textile mill. A total of 68 air samples were taken--32 with Vertical Elutriators (VE's) and 36 with HVIS's. A comparison of the results showed that the two sampler types... measured similar concen- trations of cotton dust, Statistical analyses of the results revealed that the HVIS has a higher cut-point than the VE but that the geometric standard deviations of the two samplers were not significantly different...

Arsenault, Joseph Alphonse

1987-01-01T23:59:59.000Z

344

Scaling of chaos in strongly nonlinear lattices  

SciTech Connect (OSTI)

Although it is now understood that chaos in complex classical systems is the foundation of thermodynamic behavior, the detailed relations between the microscopic properties of the chaotic dynamics and the macroscopic thermodynamic observations still remain mostly in the dark. In this work, we numerically analyze the probability of chaos in strongly nonlinear Hamiltonian systems and find different scaling properties depending on the nonlinear structure of the model. We argue that these different scaling laws of chaos have definite consequences for the macroscopic diffusive behavior, as chaos is the microscopic mechanism of diffusion. This is compared with previous results on chaotic diffusion [M. Mulansky and A. Pikovsky, New J. Phys. 15, 053015 (2013)], and a relation between microscopic chaos and macroscopic diffusion is established.

Mulansky, Mario, E-mail: mulansky@pks.mpg.de [Department of Physics and Astronomy, Potsdam University, Karl-Liebknecht-Str. 24, D-14476 Potsdam-Golm (Germany) [Department of Physics and Astronomy, Potsdam University, Karl-Liebknecht-Str. 24, D-14476 Potsdam-Golm (Germany); Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Str. 38, D-01187 Dresden (Germany); Institut für Theoretische Physik, TU Dresden, Zellescher Weg 17, D-01069 Dresden (Germany)

2014-06-15T23:59:59.000Z

345

NSF SCALE-UP GRANT ANNUAL REPORT 1998 The goal of the Student Centered Activities for Large Enrollment University Physics (SCALE-  

E-Print Network [OSTI]

NSF SCALE-UP GRANT ANNUAL REPORT 1998 Summary The goal of the Student Centered Activities for Large Enrollment University Physics (SCALE- UP) is to create and study an introductory calculus-based physics student group. The SCALE-UP curriculum is different from other integrated research-based introductory

Saul, Jeffery M.

346

Cryogenic system for the Energy Recovery Linac and vertical test facility at BNL  

SciTech Connect (OSTI)

A small cryogenic system and warm helium vacuum pumping system provides cooling to either the Energy Recovery Linac's (ERL) cryomodules that consist of a 5-cell cavity and an SRF gun or a large Vertical Test Dewar (VTD) at any given time. The cryogenic system consists of a model 1660S PSI piston plant, a 3800 liter storage dewar, subcooler, a wet expander, a 50 g/s main helium compressor, and a 170 m{sup 3} storage tank. A system description and operating plan of the cryogenic plant and cryomodules is given. The cryogenic system for ERL and the Vertical Test Dewar has a plant that can produce the equivalent of 300W at 4.5K with the addition of a wet expander 350 W at 4.5K. Along with this system, a sub-atmospheric, warm compression system provides pumping to produce 2K at the ERL cryomodules or the Vertical Test Dewar. The cryogenic system for ERL and the Vertical Test Dewar makes use of existing equipment for putting a system together. It can supply either the ERL side or the Vertical Test Dewar side, but not both at the same time. Double valve isolation on the liquid helium supply line allows one side to be warmed to room temperature and worked on while the other side is being held at operating temperature. The cryogenic system maintain the end loads from 4.4K to 2K or colder depending on capacity. Liquid helium storage dewar capacity allows ERL or the VTD to operate above the plant's capacity when required and ERL cryomodules ballast reservoirs and VTD reservoir allows the end loads to operate on full vacuum pump capacity when required.

Than, R.; Soria, V.; Lederle, D.; Orfin, P.; Porqueddu, R.; Talty, P.; Zhang, Y.; Tallerico, T.; Masi, L.

2011-03-28T23:59:59.000Z

347

Transition from Large-Scale to Small-Scale Dynamo  

SciTech Connect (OSTI)

The dynamo equations are solved numerically with a helical forcing corresponding to the Roberts flow. In the fully turbulent regime the flow behaves as a Roberts flow on long time scales, plus turbulent fluctuations at short time scales. The dynamo onset is controlled by the long time scales of the flow, in agreement with the former Karlsruhe experimental results. The is governed by a generalized {alpha} effect, which includes both the usual {alpha} effect and turbulent diffusion, plus all higher order effects. Beyond the onset we find that this generalized {alpha} effect scales as O(Rm{sup -1}), suggesting the takeover of small-scale dynamo action. This is confirmed by simulations in which dynamo occurs even if the large-scale field is artificially suppressed.

Ponty, Y. [Universite de Nice Sophia-Antipolis, CNRS, Observatoire de la Cote d'Azur, B.P. 4229, Nice cedex 04 (France); Plunian, F. [Institut des Sciences de la Terre, CNRS, Universite Joseph Fourier, B.P. 53, 38041 Grenoble cedex 09 (France)

2011-04-15T23:59:59.000Z

348

Application of Vertically-Aligned SWNT Films for the Counter Electrode of Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

Application of Vertically-Aligned SWNT Films for the Counter Electrode of Dye-Sensitized Solar a solar cell in which VA-SWNT films were used for a CE, in place of conventional sputtered Pt on fluorine to use vertically aligned single-walled carbon nanotube (VA-SWNT) films [1] synthesized by ACCVD method

Maruyama, Shigeo

349

The Price of Matching Selfish Vertices or: How much love is lost because our governments do not arrange marriages?  

E-Print Network [OSTI]

The Price of Matching Selfish Vertices or: How much love is lost because our governments do of minimum-cost perfect matchings with selfish vertices through the price of anarchy (PoA) and price the cost of her own matching edge. Keywords: minimum-cost perfect matching, stable matching, price

350

Boiling heat transfer in a vertical microchannel: Local estimation during flow boiling with a non intrusive method  

E-Print Network [OSTI]

Boiling heat transfer in a vertical microchannel: Local estimation during flow boiling with a non the results of experimental and numerical studies concerning boiling heat transfer inside vertical in minichannels for several gravity levels (µg, 1g, 2g). To fully understand the high heat transfer potential

351

Cs deposition and vertical migration in soils from Argentina J. Juri Ayub, M. Rizzotto, J. Toso, H. Velasco  

E-Print Network [OSTI]

1 137 Cs deposition and vertical migration in soils from Argentina J. Juri Ayub, M. Rizzotto, J), Universidad Nacional de San Luis. CONICET. Ejército de los Andes 950, 5700 San Luis, Argentina Abstract. Vertical migration of 137 Cs global fallout was studied in soils from Argentina. The sampling area

Nacional de San Luis, Universidad

352

Functional MR imaging of the awake monkey in a novel vertical large-bore 7 Tesla setup J. Pfeuffer1  

E-Print Network [OSTI]

Functional MR imaging of the awake monkey in a novel vertical large-bore 7 Tesla setup J. Pfeuffer1 , J. Pauls1 , M. Augath1 , T. Steudel1 , H. Merkle2 , N. K. Logothetis1 1 Max Planck InstituteMRI results in the awake trained monkey (Macaca mulatta) using a novel vertical 7T/60cm MR system are reported

Jegelka, Stefanie

353

The DC field components of horizontal and vertical electric dipole sources immersed in three-layered stratified media  

E-Print Network [OSTI]

for the solution in the case of horizontal electric dipole (HED) radiation source and the single-component HertzThe DC field components of horizontal and vertical electric dipole sources immersed in three- ponents of the static (DC) fields of horizontal electric dipoles ( HEDs) and vertical electric dipoles

Boyer, Edmond

354

On the Vertical Decay Rate of the Maximum Tangential Winds in Tropical Cyclones DANIEL P. STERN* AND DAVID S. NOLAN  

E-Print Network [OSTI]

On the Vertical Decay Rate of the Maximum Tangential Winds in Tropical Cyclones DANIEL P. STERN independent of both the maximum wind speed and the radius of maximum winds (RMW). This can be seen winds change with height. Above 2-km height, vertical profiles of Vmaxnorm are nearly independent

Nolan, David S.

355

Pore-scale simulation of microbial growth using a genome-scale metabolic model: Implications for Darcy-scale reactive transport  

SciTech Connect (OSTI)

Recent advances in microbiology have enabled the quantitative simulation of microbial metabolism and growth based on genome-scale characterization of metabolic pathways and fluxes. We have incorporated a genome-scale metabolic model of the iron-reducing bacteria Geobacter sulfurreducens into a pore-scale simulation of microbial growth based on coupling of iron reduction to oxidation of a soluble electron donor (acetate). In our model, fluid flow and solute transport is governed by a combination of the Navier-Stokes and advection-diffusion-reaction equations. Microbial growth occurs only on the surface of soil grains where solid-phase mineral iron oxides are available. Mass fluxes of chemical species associated with microbial growth are described by the genome-scale microbial model, implemented using a constraint-based metabolic model, and provide the Robin-type boundary condition for the advection-diffusion equation at soil grain surfaces. Conventional models of microbially-mediated subsurface reactions use a lumped reaction model that does not consider individual microbial reaction pathways, and describe reactions rates using empirically-derived rate formulations such as the Monod-type kinetics. We have used our pore-scale model to explore the relationship between genome-scale metabolic models and Monod-type formulations, and to assess the manifestation of pore-scale variability (microenvironments) in terms of apparent Darcy-scale microbial reaction rates. The genome-scale model predicted lower biomass yield, and different stoichiometry for iron consumption, in comparisonto prior Monod formulations based on energetics considerations. We were able to fit an equivalent Monod model, by modifying the reaction stoichiometry and biomass yield coefficient, that could effectively match results of the genome-scale simulation of microbial behaviors under excess nutrient conditions, but predictions of the fitted Monod model deviated from those of the genome-scale model under conditions in which one or more nutrients were limiting. The fitted Monod kinetic model was also applied at the Darcy scale; that is, to simulate average reaction processes at the scale of the entire pore-scale model domain. As we expected, even under excess nutrient conditions for which the Monod and genome-scale models predicted equal reaction rates at the pore scale, the Monod model over-predicted the rates of biomass growth and iron and acetate utilization when applied at the Darcy scale. This discrepancy is caused by an inherent assumption of perfect mixing over the Darcy-scale domain, which is clearly violated in the pore-scale models. These results help to explain the need to modify the flux constraint parameters in order to match observations in previous applications of the genome-scale model at larger scales. These results also motivate further investigation of quantitative multi-scale relationships between fundamental behavior at the pore scale (where genome-scale models are appropriately applied) and observed behavior at larger scales (where predictions of reactive transport phenomena are needed).

Tartakovsky, Guzel D.; Tartakovsky, Alexandre M.; Scheibe, Timothy D.; Fang, Yilin; Mahadevan, Radhakrishnan; Lovley, Derek R.

2013-09-07T23:59:59.000Z

356

A study of the reliability, validity, and norms of the Dyadic Adjustment Scale and the Marital Satisfaction Scale for use with Mexican Americans in Central Texas  

E-Print Network [OSTI]

; MDiv. , Gordon-Conwell Theological Seminary Chair of Advisory Committee: Dr. Arthur J. Roach This study was a validation study of the Marital Satisfaction Scale and the Dyadic Adjustment Scale for use in marital therapy and research with Mexican..., Spanier, 1976) and the Marital Satisfaction Scale (MSS, Roach, Frazier, 4 Bowden, 1981) when used with a Mexican American population. A second objective was to explore, for both scales, issues of bias and scoring pattern differences between Mexican...

Kummerer, Gene Henry

1992-01-01T23:59:59.000Z

357

DUSEL Facility Cooling Water Scaling Issues  

SciTech Connect (OSTI)

Precipitation (crystal growth) in supersaturated solutions is governed by both kenetic and thermodynamic processes. This is an important and evolving field of research, especially for the petroleum industry. There are several types of precipitates including sulfate compounds (ie. barium sulfate) and calcium compounds (ie. calcium carbonate). The chemical makeup of the mine water has relatively large concentrations of sulfate as compared to calcium, so we may expect that sulfate type reactions. The kinetics of calcium sulfate dihydrate (CaSO4 {center_dot} 2H20, gypsum) scale formation on heat exchanger surfaces from aqueous solutions has been studied by a highly reproducible technique. It has been found that gypsum scale formation takes place directly on the surface of the heat exchanger without any bulk or spontaneous precipitation in the reaction cell. The kinetic data also indicate that the rate of scale formation is a function of surface area and the metallurgy of the heat exchanger. As we don't have detailed information about the heat exchanger, we can only infer that this will be an issue for us. Supersaturations of various compounds are affected differently by temperature, pressure and pH. Pressure has only a slight affect on the solubility, whereas temperature is a much more sensitive parameter (Figure 1). The affect of temperature is reversed for calcium carbonate and barium sulfate solubilities. As temperature increases, barium sulfate solubility concentrations increase and scaling decreases. For calcium carbonate, the scaling tendencies increase with increasing temperature. This is all relative, as the temperatures and pressures of the referenced experiments range from 122 to 356 F. Their pressures range from 200 to 4000 psi. Because the cooling water system isn't likely to see pressures above 200 psi, it's unclear if this pressure/scaling relationship will be significant or even apparent. The most common scale minerals found in the oilfield include calcium carbonates (CaCO3, mainly calcite) and alkaline-earth metal sulfates (barite BaSO4, celestite SrSO4, anhydrite CaSO4, hemihydrate CaSO4 1/2H2O, and gypsum CaSO4 2H2O or calcium sulfate). The cause of scaling can be difficult to identify in real oil and gas wells. However, pressure and temperature changes during the flow of fluids are primary reasons for the formation of carbonate scales, because the escape of CO2 and/or H2S gases out of the brine solution, as pressure is lowered, tends to elevate the pH of the brine and result in super-saturation with respect to carbonates. Concerning sulfate scales, the common cause is commingling of different sources of brines either due to breakthrough of injected incompatible waters or mixing of two different brines from different zones of the reservoir formation. A decrease in temperature tends to cause barite to precipitate, opposite of calcite. In addition, pressure drops tend to cause all scale minerals to precipitate due to the pressure dependence of the solubility product. And we can expect that there will be a pressure drop across the heat exchanger. Weather or not this will be offset by the rise in pressure remains to be seen. It's typically left to field testing to prove out. Progress has been made toward the control and treatment of the scale deposits, although most of the reaction mechanisms are still not well understood. Often the most efficient and economic treatment for scale formation is to apply threshold chemical inhibitors. Threshold scale inhibitors are like catalysts and have inhibition efficiency at very low concentrations (commonly less than a few mg/L), far below the stoichiometric concentrations of the crystal lattice ions in solution. There are many chemical classes of inhibitors and even more brands on the market. Based on the water chemistry it is anticipated that there is a high likelihood for sulfate compound precipitation and scaling. This may be dependent on the temperature and pressure, which vary throughout the system. Therefore, various types and amounts of scaling may occur at different

Daily, W D

2011-04-05T23:59:59.000Z

358

Miniaturized electron-impact-ionization pumps using double-gated isolated vertically aligned carbon nanotube arrays  

E-Print Network [OSTI]

There is a need for microscale vacuum pumps that can be readily integrated with other MEMS and electronic components at the chip-scale level. Miniaturized ion pumps exhibit favorable scaling down because they are surface-limited ...

Jayanty, Vivi

2012-01-01T23:59:59.000Z

359

Report (Vertical)  

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 Administration the1 -the Mid-Infrared at 278, 298,NIST31 ORV 15051SoilWind EnergyRentalRep.LANS 401(k)

360

Report (Vertical)  

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 Administration the1 -the Mid-Infrared at 278, 298,NIST31 ORV 15051SoilWind EnergyRentalRep.LANS

Note: This page contains sample records for the topic "vertical scales differ" 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

Report (Vertical)  

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 Administration the1 -the Mid-Infrared at 278, 298,NIST31 ORV 15051SoilWind EnergyRentalRep.LANSLANS

362

Large scale tracking algorithms.  

SciTech Connect (OSTI)

Low signal-to-noise data processing algorithms for improved detection, tracking, discrimination and situational threat assessment are a key research challenge. As sensor technologies progress, the number of pixels will increase signi cantly. This will result in increased resolution, which could improve object discrimination, but unfortunately, will also result in a significant increase in the number of potential targets to track. Many tracking techniques, like multi-hypothesis trackers, suffer from a combinatorial explosion as the number of potential targets increase. As the resolution increases, the phenomenology applied towards detection algorithms also changes. For low resolution sensors, "blob" tracking is the norm. For higher resolution data, additional information may be employed in the detection and classfication steps. The most challenging scenarios are those where the targets cannot be fully resolved, yet must be tracked and distinguished for neighboring closely spaced objects. Tracking vehicles in an urban environment is an example of such a challenging scenario. This report evaluates several potential tracking algorithms for large-scale tracking in an urban environment.

Hansen, Ross L.; Love, Joshua Alan; Melgaard, David Kennett; Karelitz, David B.; Pitts, Todd Alan; Zollweg, Joshua David; Anderson, Dylan Z.; Nandy, Prabal; Whitlow, Gary L.; Bender, Daniel A.; Byrne, Raymond Harry

2015-01-01T23:59:59.000Z

363

Scaling of structural failure  

SciTech Connect (OSTI)

This article attempts to review the progress achieved in the understanding of scaling and size effect in the failure of structures. Particular emphasis is placed on quasibrittle materials for which the size effect is complicated. Attention is focused on three main types of size effects, namely the statistical size effect due to randomness of strength, the energy release size effect, and the possible size effect due to fractality of fracture or microcracks. Definitive conclusions on the applicability of these theories are drawn. Subsequently, the article discusses the application of the known size effect law for the measurement of material fracture properties, and the modeling of the size effect by the cohesive crack model, nonlocal finite element models and discrete element models. Extensions to compression failure and to the rate-dependent material behavior are also outlined. The damage constitutive law needed for describing a microcracked material in the fracture process zone is discussed. Various applications to quasibrittle materials, including concrete, sea ice, fiber composites, rocks and ceramics are presented.

Bazant, Z.P. [Northwestern Univ., Evanston, IL (United States); Chen, Er-Ping [Sandia National Lab., Albuquerque, NM (United States)

1997-01-01T23:59:59.000Z

364

NITROGEN REMOVALS IN VERTICAL FLOW CONSTRUCTED WETLAND WITH LOW-COST SUBSTRATA TREATING FECAL  

E-Print Network [OSTI]

-C) that were used to compare treatment performance with conventional substrata (small gravel, CW-G). Pilot-scale Federal Institute for Aquatic Science and Technology (EAWAG), Department of Water and Sanitation alternative substrata is a focus of the study. The experiments employed five lab-scale and one pilot-scale

Richner, Heinz

365

Magnetotransport properties of quasi-one-dimensionally channeled vertically aligned heteroepitaxial nanomazes  

SciTech Connect (OSTI)

A unique quasi-one-dimensionally channeled nanomaze structure has been self-assembled in the (La{sub 0.7}Sr{sub 0.3}MnO{sub 3}){sub 1?x}:(ZnO){sub x} vertically aligned nanocomposites (VANs). Significantly enhanced magnetotransport properties have been achieved by tuning the ZnO composition x. The heteroepitaxial VAN thin films, free of large angle grain boundaries, exhibit a maximum low-field magnetoresistance (LFMR) of 75% (20?K and 1?T). The enhanced LFMR close to the percolation threshold is attributed to the spin-polarized tunneling through the ferromagnetic/insulating/ferromagnetic vertical sandwiches in the nanomazes. This study suggests that the phase boundary in the nanomaze structure is an alternative approach to produce decoupled ferromagnetic domains and thus to achieve enhanced magnetoresistance.

Chen, Aiping; Zhang, Wenrui; Khatkhatay, Fauzia; Su, Qing; Tsai, Chen-Fong; Chen, Li; Wang, H., E-mail: wangh@ece.tamu.edu [Department of Electrical and Computer Engineering, Texas A and M University, College Station, Texas 77843 (United States); Jia, Q. X. [Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); MacManus-Driscoll, Judith L. [Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ (United Kingdom)] [Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ (United Kingdom)

2013-03-04T23:59:59.000Z

366

Metrology for x-ray telescope mirrors in a vertical configuration  

SciTech Connect (OSTI)

Mirrors used in x-ray telescope systems for observations outside of the earth`s atmosphere are usually made of several thin nested shells, each formed by a pair of paraboloidal and hyperboloidal surfaces. The thin shells are very susceptible to self-weight deflection caused by gravity and are nearly impossible to test by conventional interferometric techniques. The metrology requirements for these mirrors are extremely challenging. This paper presents a prototype of a Vertical Scanning Long Trace Profiler (VSLTP) which is optimized to measure the surface figure of x-ray telescope mirrors in a vertical orientation. The optical system of the VSLTP is described. Experimental results from measurements on an x-ray telescope mandrel and tests of the accuracy and repeatability of the prototype VSLTP are presented. The prototype instrument has achieved a height measurement accuracy of about 50 nanometers with a repeatability of better than 20 nanometers, and a slope measurement accuracy of about 1 microradian.

Li, Haizhang; Li, Xiaodan; Grindel, M.W.

1995-09-01T23:59:59.000Z

367

THE VERTICAL COMPOSITION OF NEUTRINO-DOMINATED ACCRETION DISKS IN GAMMA-RAY BURSTS  

SciTech Connect (OSTI)

We investigate the vertical structure and element distribution of neutrino-dominated accretion flows around black holes in spherical coordinates using the reasonable nuclear statistical equilibrium. According to our calculations, heavy nuclei tend to be produced in a thin region near the disk surface, whose mass fractions are primarily determined by the accretion rate and vertical distribution of temperature and density. In this thin region, we find that {sup 56}Ni is dominant for the flow with a low accretion rate (e.g., 0.05 M {sub Sun} s{sup -1}), but {sup 56}Fe is dominant for the flow with a high accretion rate (e.g., 1 M {sub Sun} s{sup -1}). The dominant {sup 56}Ni in the aforementioned region may provide a clue to understanding the bumps in the optical light curve of core-collapse supernovae.

Liu, Tong; Xue, Li; Gu, Wei-Min; Lu, Ju-Fu, E-mail: tongliu@xmu.edu.cn [Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen, Fujian 361005 (China)] [Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen, Fujian 361005 (China)

2013-01-10T23:59:59.000Z

368

In situ oil shale retort with a generally T-shaped vertical cross section  

DOE Patents [OSTI]

An in situ oil shale retort is formed in a subterranean formation containing oil shale. The retort contains a fragmented permeable mass of formation particles containing oil shale and has a production level drift in communication with a lower portion of the fragmented mass for withdrawing liquid and gaseous products of retorting during retorting of oil shale in the fragmented mass. The principal portion of the fragmented mass is spaced vertically above a lower production level portion having a generally T-shaped vertical cross section. The lower portion of the fragmented mass has a horizontal cross sectional area smaller than the horizontal cross sectional area of the upper principal portion of the fragmented mass above the production level.

Ricketts, Thomas E. (Grand Junction, CO)

1981-01-01T23:59:59.000Z

369

Vertical sampling flights in support of the 1981 ASCOT cooling tower experiments: field effort and data  

SciTech Connect (OSTI)

During the month of August 1981, three nights of experimental sampling of tracers released into the cooling tower plume of a geothermal power plant were conducted. In these experiments a tethered balloon was used to lift a payload so as to obtain vertical profiles of the cooling tower plume and the entrained tracers. A description of the equipment used, the field effort and the data acquired are presented here.

Gay, G.T.

1982-03-01T23:59:59.000Z

370

Proposal for the development of 3D Vertically Integrated Pattern Recognition Associative Memory (VIPRAM)  

SciTech Connect (OSTI)

Future particle physics experiments looking for rare processes will have no choice but to address the demanding challenges of fast pattern recognition in triggering as detector hit density becomes significantly higher due to the high luminosity required to produce the rare process. The authors propose to develop a 3D Vertically Integrated Pattern Recognition Associative Memory (VIPRAM) chip for HEP applications, to advance the state-of-the-art for pattern recognition and track reconstruction for fast triggering.

Deptuch, Gregory; Hoff, Jim; Kwan, Simon; Lipton, Ron; Liu, Ted; Ramberg, Erik; Todri, Aida; Yarema, Ray; /Fermilab; Demarteua, Marcel,; Drake, Gary; Weerts, Harry; /Argonne /Chicago U. /Padua U. /INFN, Padua

2010-10-01T23:59:59.000Z

371

Net weekly variation of vertical temperature structure in the upper ocean layers (Autumn, North Atlantic)  

E-Print Network [OSTI]

LIBRARY A a M COLLEGE OF TEXAS HET MEEKLY VARIATION OF VERTICAL TEMPERATURE STRUCTURE IN THE UPPER OCEAN LAYERS (AUTUMN, NORTH ATIANTIC) A Thesis RCHERT ALLEN GILCREST Submitted to the Graduate School of the Agricultural and Mechanical... Temperature in the mixed layer Temperature in the mixed layer at the beginning of a week TD 4500 1" 500 Pw p s Ocean surface temperature Temperature at the level of no seasonal ohange Air temperature Air temperature at anemometer height Dew point...

Gilcrest, Robert A

2012-06-07T23:59:59.000Z

372

An experimental investigation of binary solidification in a vertical channel with thermal and solutal mixed convection  

SciTech Connect (OSTI)

Experimental measurements and photographic observations are presented for the solidification of a binary, aqueous ammonium chloride solution in a vertical channel. Transient liquidus front progressions and temperature measurements are used to characterize the influences of flow rate, superheat, composition, and chill wall temperature on binary phase-change behavior. Experimental results are compared with previously reported model predictions and discrepancies are used to critically assess model assumptions and limitations.

Bennon, W.D. (Aluminum Company of America, Alcoa Center, PA 15069 (USA)); Incropera, F.P. (Heat Transfer Laboratory, School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907 (USA))

1989-08-01T23:59:59.000Z

373

Vertices of Lie Modules Roger M. Bryant, Susanne Danz, Karin Erdmann, and Jrgen Mller  

E-Print Network [OSTI]

Vertices of Lie Modules Roger M. Bryant, Susanne Danz, Karin Erdmann, and Jürgen Müller September 9 studied by Erdmann#21;Tan [14], and by Bryant#21;Lim#21;Tan [5]. By [5, Thm. 1.2], one has dim(Lie pr F (n to the principal block of FS n , and Bryant#21;Erdmann [4] have studied indecomposable direct sum decompositions

Mueller, Jürgen

374

Analysis of vertical resolution of seismic signals associated with a reservoir  

E-Print Network [OSTI]

for the detectability of the reservoir. 19 CHAPTER II WAVELET DECONVOLUTION INTRODUCTION Dynamite was used as the source in the seismic survey recorded at BCR 39. This type of source gives a seismic pulse whose duration is less than one millisecond (ms...ANALYSIS OF VERTICAL RESOLUTION OF SEISMIC SIGNALS ASSOCIATED WITH A RESERVOIR. A Thesis by ERIC SCOTT HUDGENS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree...

Hudgens, Eric Scott

1991-01-01T23:59:59.000Z

375

Estimation of vertical permeability from production data of wells in bottom water drive reservoirs  

E-Print Network [OSTI]

in Vertical Permeability Introduced by Erroneous Horizontal Permeabilty on Future performance of a Mell 13 39 43 43 10 Effect of Production From Test Perforation on Future Performance of a Well (Kh/Kv 1) . . . . . . . . . . . 57 Effect of Production... between perforations and the WOC, Kh/Kv = I . . . . . . . . . . . . . . . . . . . . . . . 17 Effect of cell break-up on producing WOR performance for 9 ft interval between perforations and the WOC, Kh/Kv 30 . l8 Effect of cell break-up on cumulative...

Tirek, Ali

1982-01-01T23:59:59.000Z

376

An after-market, five-port vertical beam line extension for the PETtrace  

SciTech Connect (OSTI)

Most commercial cyclotrons intended for medical isotope production provide a limited number of beam ports crowded into a minimal vault space. Taking advantage of our new lab construction, we planned and installed a beam-line on port Music-Sharp-Sign 2 of our GEMS PETtrace to bring beam to an additional 5 target positions. These are oriented in the vertical plane, with the downward directed beam well suited for molten target substrates.

Barnhart, T. E.; Engle, J. W.; Severin, G. W.; Valdovinos, H. F.; Gagnon, K.; Nickles, R. J. [Department of Medical Physics, University of Wisconsin, Madison, WI (United States); Los Alamos National Lab, Los Alamos, NM (United States); Hevesy Laboratory, Danish Technical University, Riso (Denmark); Department of Medical Physics, University of Wisconsin, Madison, WI (United States); Department of Radiology, University of Washington, Seattle, WA (United States); Department of Medical Physics, University of Wisconsin, Madison, WI (United States)

2012-12-19T23:59:59.000Z

377

Influence by small dispersive coal dust particles of different fractional consistence on characteristics of iodine air filter at nuclear power plant  

E-Print Network [OSTI]

The main purpose of research is to determine the influence by the small dispersive coal dust particles of the different fractional consistence on the technical characteristics of the vertical iodine air filter at nuclear power plant. The research on the transport properties of the small dispersive coal dust particles in the granular filtering medium of absorber in the vertical iodine air filter is completed in the case, when the modeled aerodynamic conditions are similar to the real aerodynamic conditions. It is shown that the appearance of the different fractional consistence of small dispersive coal dust particles with the decreasing dimensions down to the micro and nano sizes at the action of the air dust aerosol stream normally results in a significant change of distribution of the small dispersive coal dust particles masses in the granular filtering medium of an absorber in the vertical iodine air filter, changing the vertical iodine air filter aerodynamic characteristics. The precise characterization of...

Neklyudov, I M; Fedorova, L I; Poltinin, P Ya

2013-01-01T23:59:59.000Z

378

Industrial Scale Demonstration of Smart Manufacturing Achieving...  

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

Scale Demonstration of Smart Manufacturing Achieving Transformational Energy Productivity Gains Industrial Scale Demonstration of Smart Manufacturing Achieving...

379

Strain-induced vertical self-organization of semiconductor quantum dots: A computational study  

SciTech Connect (OSTI)

Atomistic strain simulations based on the valence force field method are employed to study the vertical arrangements of semiconductor quantum dot (QD) multilayers. The effects of the QD shape, dimensions, and materials parameters are systematically investigated, varying independently the following parameters: spacer width H, QD lateral spacing D, base b, and height h, slope of the side facets, elastic properties of the dot and the substrate materials, and lattice mismatch between the dot and the substrate. The transition between vertically aligned and anti-aligned structures is found to be determined mainly by the ratios H/D and b/D, as well as by the strain anisotropy of the substrate and to a lesser extent of the QD. The dependence on the QD height h is significant only for steep side facets and large aspect ratios h/b, and the effects of the lattice mismatch strain and the bulk elastic moduli are found to be negligible. The comparison with experimental data shows an excellent agreement with the results from the simulations, demonstrating that the presented analysis results in precise theoretical predictions for the vertical self-organization regime in a wide range of QD materials systems.

Shtinkov, N., E-mail: nshtinkov@uottawa.ca [Department of Physics, University of Ottawa, 150 Louis Pasteur, Ottawa (Ontario) K1N 6N5 (Canada)

2013-12-28T23:59:59.000Z

380

Comparative examination of scale-explicit biological and physical processes: recruitment  

E-Print Network [OSTI]

Comparative examination of scale-explicit biological and physical processes: recruitment of Pacific that operate at different spatial and temporal scales. Rate diagrams plot and contour ratios of process rates as a function of spatial and temporal scale to summarize the relative importance of demographics, growth

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


381

A Scaleless Snake: Tests of the Role of Reptilian Scales in Water Loss and Heat Transfer  

E-Print Network [OSTI]

A Scaleless Snake: Tests of the Role of Reptilian Scales in Water Loss and Heat Transfer Reprinted: Tests of the Role of Reptilian Scales in Water Loss and Heat Transfer A unique specimen of gopher snake of pulmocutaneous water loss and heat transfer, no difference was observed between the scale- less animal

Bennett, Albert F.

382

Implicit Scaling in Ecological Research  

E-Print Network [OSTI]

- sion, and abstruse structures, such as communities and ecosystems. The diversity of organisms and eco. It was our supposition that the often unrecognized relation- ship between organism/concept and scale should- ination, we hope to raise ecologists' awareness of scale-dependent rela- tionships among organisms and eco

Tullos, Desiree

383

PILOT-SCALE FIELD VALIDATION OF THE LONG ELECTRODE ELECTRICAL RESISTIVITY TOMOGRAPHY METHOD  

SciTech Connect (OSTI)

Field validation for the long electrode electrical resistivity tomography (LE-ERT) method was attempted in order to demonstrate the performance of the technique in imaging a simple buried target. The experiment was an approximately 1/17 scale mock-up of a region encompassing a buried nuclear waste tank on the Hanford site. The target of focus was constructed by manually forming a simulated plume within the vadose zone using a tank waste simulant. The LE-ERT results were compared to ERT using conventional point electrodes on the surface and buried within the survey domain. Using a pole-pole array, both point and long electrode imaging techniques identified the lateral extents of the pre-formed plume with reasonable fidelity, but the LE-ERT was handicapped in reconstructing the vertical boundaries. The pole-dipole and dipole-dipole arrays were also tested with the LE-ERT method and were shown to have the least favorable target properties, including the position of the reconstructed plume relative to the known plume and the intensity of false positive targets. The poor performance of the pole-dipole and dipole-dipole arrays was attributed to an inexhaustive and non-optimal coverage of data at key electrodes, as well as an increased noise for electrode combinations with high geometric factors. However, when comparing the model resolution matrix among the different acquisition strategies, the pole-dipole and dipole-dipole arrays using long electrodes were shown to have significantly higher average and maximum values than any pole-pole array. The model resolution describes how well the inversion model resolves the subsurface. Given the model resolution performance of the pole-dipole and dipole-dipole arrays, it may be worth investing in tools to understand the optimum subset of randomly distributed electrode pairs to produce maximum performance from the inversion model.

GLASER DR; RUCKER DF; CROOK N; LOKE MH

2011-07-14T23:59:59.000Z

384

Modeling vertical beta-diversity in tropical butterfly communities Thomas R. Walla, Steinar Engen, Philip J. DeVries and Russell Lande  

E-Print Network [OSTI]

Modeling vertical beta-diversity in tropical butterfly communities Thomas R. Walla, Steinar Engen vertical beta- diversity in tropical butterfly communities. Á/ Oikos 107: 610Á/618. We present a novel of structure present. Beta-diversity (MacArthur

Devries, Philip J.

385

Resilience of Social Networks Under Different Attack Strategies  

E-Print Network [OSTI]

Recent years have seen the world become a closely connected society with the emergence of different types of social networks. Online social networks have provided a way to bridge long distances and establish numerous communication channels which were not possible earlier. These networks exhibit interesting behavior under intentional attacks and random failures where different structural properties influence the resilience in different ways. In this paper, we perform two sets of experiments and draw conclusions from the results pertaining to the resilience of social networks. The first experiment performs a comparative analysis of four different classes of networks namely small world networks, scale free networks, small world-scale free networks and random networks with four semantically different social networks under different attack strategies. The second experiment compares the resilience of these semantically different social networks under different attack strategies. Empirical analysis reveals interesti...

Latif, Mohammad Ayub; Zaidi, Faraz

2014-01-01T23:59:59.000Z

386

Mineral dissolution kinetics at the pore scale  

SciTech Connect (OSTI)

Mineral dissolution rates in the field have been reported to be orders of magnitude slower than those measured in the laboratory, an unresolved discrepancy that severely limits our ability to develop scientifically defensible predictive or even interpretive models for many geochemical processes in the earth and environmental sciences. One suggestion links this discrepancy to the role of physical and chemical heterogeneities typically found in subsurface soils and aquifers in producing scale-dependent rates where concentration gradients develop. In this paper, we examine the possibility that scale-dependent mineral dissolution rates can develop even at the single pore and fracture scale, the smallest and most fundamental building block of porous media. To do so, we develop two models to analyze mineral dissolution kinetics at the single pore scale: (1) a Poiseuille Flow model that applies laboratory-measured dissolution kinetics at the pore or fracture wall and couples this to a rigorous treatment of both advective and diffusive transport, and (2) a Well-Mixed Reactor model that assumes complete mixing within the pore, while maintaining the same reactive surface area, average flow rate, and geometry as the Poiseuille Flow model. For a fracture, a 1D Plug Flow Reactor model is considered in addition to quantify the effects of longitudinal versus transverse mixing. The comparison of averaged dissolution rates under various conditions of flow, pore size, and fracture length from the three models is used as a means to quantify the extent to which concentration gradients at the single pore and fracture scale can develop and render rates scale-dependent. Three important minerals that dissolve at widely different rates, calcite, plagioclase, and iron hydroxide, are considered. The modeling indicates that rate discrepancies arise primarily where concentration gradients develop due to comparable rates of reaction and advective transport, and incomplete mixing via molecular diffusion. The magnitude of the reaction rate is important, since it is found that scaling effects (and thus rate discrepancies) are negligible at the single pore and fracture scale for plagioclase and iron hydroxide because of the slow rate at which they dissolve. In the case of calcite, where dissolution rates are rapid, scaling effects can develop at high flow rates from 0.1 cm/s to 1000 cm/s and for fracture lengths less than 1 cm. At more normal flow rates, however, mixing via molecular diffusion is effective in homogenizing the concentration field, thus eliminating any discrepancies between the Poiseuille Flow and the Well-Mixed Reactor model. This suggests that a scale dependence to mineral dissolution rates is unlikely at the single pore or fracture scale under normal geological/hydrologic conditions, implying that the discrepancy between laboratory and field rates must be attributed to other factors.

Li, L.; Steefel, C.I.; Yang, L.

2007-05-24T23:59:59.000Z

387

Characterization of Filtration Scale-Up Performance  

SciTech Connect (OSTI)

The scale-up performance of sintered stainless steel crossflow filter elements planned for use at the Pretreatment Engineering Platform (PEP) and at the Waste Treatment and Immobilization Plant (WTP) were characterized in partial fulfillment (see Table S.1) of the requirements of Test Plan TP RPP WTP 509. This test report details the results of experimental activities related only to filter scale-up characterization. These tests were performed under the Simulant Testing Program supporting Phase 1 of the demonstration of the pretreatment leaching processes at PEP. Pacific Northwest National Laboratory (PNNL) conducted the tests discussed herein for Bechtel National, Inc. (BNI) to address the data needs of Test Specification 24590-WTP-TSP-RT-07-004. Scale-up characterization tests employ high-level waste (HLW) simulants developed under the Test Plan TP-RPP-WTP-469. The experimental activities outlined in TP-RPP-WTP-509 examined specific processes from two broad areas of simulant behavior: 1) leaching performance of the boehmite simulant as a function of suspending phase chemistry and 2) filtration performance of the blended simulant with respect to filter scale-up and fouling. With regard to leaching behavior, the effect of anions on the kinetics of boehmite leaching was examined. Two experiments were conducted: 1) one examined the effect of the aluminate anion on the rate of boehmite dissolution and 2) another determined the effect of secondary anions typical of Hanford tank wastes on the rate of boehmite dissolution. Both experiments provide insight into how compositional variations in the suspending phase impact the effectiveness of the leaching processes. In addition, the aluminate anion studies provide information on the consequences of gibbsite in waste. The latter derives from the expected fast dissolution of gibbsite relative to boehmite. This test report concerns only results of the filtration performance with respect to scale-up. Test results for boehmite dissolution kinetics and filter fouling are reported elsewhere (see Table S.1). The primary goal of scale-up testing was to examine how filter length influenced permeate flux rates. To accomplish this, the existing cells unit filter system, which employs a 2-ft-long, 0.5-in. (inner) diameter sintered stainless steel filter element, was redesigned to accommodate an 8-ft. sintered stainless steel filter element of the same diameter. Testing was then performed to evaluate the filtration performance of waste simulant slurries. Scale-up testing consisted of two separate series of filtration tests: 1) scale-up axial velocity (AV)/transmembrane pressure (TMP) matrix tests and 2) scale-up temperature tests. The AV/TMP matrix tests examined filtration performance of two different waste simulant slurries in the 8-ft. cells unit filter system. Waste simulant slurry formulations for the 8-ft. scale-up test was selected to match simulant slurries for which filtration performance had been characterized on the 2-ft CUF. For the scale-up temperature tests, the filtration performance at three test temperatures (i.e., 25°C, 40°C, and 60°C) was determined to evaluate if filter flux versus temperature correlations developed using the 2-ft filters were also valid for the 8-ft filters.

Daniel, Richard C.; Billing, Justin M.; Luna, Maria L.; Cantrell, Kirk J.; Peterson, Reid A.; Bonebrake, Michael L.; Shimskey, Rick W.; Jagoda, Lynette K.

2009-03-09T23:59:59.000Z

388

Large-scale biomass plantings in Minnesota: Scale-up and demonstration projects in perspective  

SciTech Connect (OSTI)

Scale-up projects are an important step toward demonstration and commercialization of woody biomass because simply planting extensive acreage of hybrid poplar will not develop markets. Project objectives are to document the cost to plant and establish, and effort needed to monitor and maintain woody biomass on agricultural land. Conversion technologies and alternative end-uses are examined in a larger framework in order to afford researchers and industrial partners information necessary to develop supply and demand on a local or regional scale. Likely to be determined are risk factors of crop failure and differences between establishment of research plots and agricultural scale field work. Production economics are only one consideration in understanding demonstration and scale-up. Others are environmental, marketing, industrial, and agricultural in nature. Markets for energy crops are only beginning to develop. Although information collected as a result of planting up to 5000 acres of hybrid poplar in central Minnesota will not necessarily be transferable to other areas of the country, a national perspective will come from development of regional markets for woody and herbaceous crops. Several feedstocks, with alternative markets in different regions will eventually comprise the entire picture of biofuels feedstock market development. Current projects offer opportunities to learn about the complexity and requirements that will move biomass from research and development to actual market development. These markets may include energy and other end-uses such as fiber.

Kroll, T. [Minnesota Univ., St. Paul, MN (United States). Forestry Div.; Downing, M. [Oak Ridge National Lab., TN (United States)

1995-09-01T23:59:59.000Z

389

Evaporation heat transfer and friction characteristics of R-134a flowing downward in a vertical corrugated tube  

SciTech Connect (OSTI)

Differently from most previous studies, the heat transfer and friction characteristics of the pure refrigerant HFC-134a during evaporation inside a vertical corrugated tube are experimentally investigated. The double tube test sections are 0.5 m long with refrigerant flowing in the inner tube and heating water flowing in the annulus. The inner tubes are one smooth tube and two corrugated tubes, which are constructed from smooth copper tube of 8.7 mm inner diameter. The test runs are performed at evaporating temperatures of 10, 15, and 20 C, heat fluxes of 20, 25, and 30 kW/m{sup 2}, and mass fluxes of 200, 300, and 400 kg/m{sup 2} s. The quality of the refrigerant in the test section is calculated using the temperature and pressure obtained from the experiment. The pressure drop across the test section is measured directly by a differential pressure transducer. The effects of heat flux, mass flux, and evaporation temperature on the heat transfer coefficient and two-phase friction factor are also discussed. It is found that the percentage increases of the heat transfer coefficient and the two-phase friction factor of the corrugated tubes compared with those of the smooth tube are approximately 0-10% and 70-140%, respectively. (author)

Aroonrat, Kanit; Wongwises, Somchai [Fluid Mechanics, Thermal Engineering and Multiphase Flow Research Lab. (FUTURE), Department of Mechanical Engineering, King Mongkut's University of Technology Thonburi, Bangmod, Bangkok 10140 (Thailand)

2011-01-15T23:59:59.000Z

390

A Comparison of Platform Options for Deep-water Floating Offshore Vertical Axis Wind Turbines: An Initial Study.  

SciTech Connect (OSTI)

This analysis utilizes a 5 - MW VAWT topside design envelope created by Sandia National Laborator ies to compare floating platform options fo r each turbine in the design space. The platform designs are based on two existing designs, the OC3 Hywind spar - buoy and Principal Power's WindFloat semi - submersible. These designs are scaled using Froude - scaling relationships to determine an appropriately sized spar - buoy and semi - submersible design for each topside. Both the physical size of the required platform as well as mooring configurations are considered. Results are compared with a comparable 5 - MW HAWT in order to identify potential differences in the platform and mooring sizing between the VAWT and HAWT . The study shows that there is potential for cost savings due to reduced platform size requirements for the VAWT.

Bull, Diana L; Fowler, Matthew; Goupee, Andrew

2014-08-01T23:59:59.000Z

391

Hydranet: network support for scaling of large scale servic es  

E-Print Network [OSTI]

With the explosive growth of demand for services on the Internet, the networking infrastructure (routers 7 protocols, servers) is under considerable stress. Mechanisms are needed for current and future IP services to scale in a client transparent...

Chawla, Hamesh

1998-01-01T23:59:59.000Z

392

Towards the Scale Invariant Cosmology  

E-Print Network [OSTI]

An argument is made to show that the singularity in the General Theory of Relativity (GTR) is the expression of a non-Machian feature. It can be avoided with a scale-invariant dynamical theory, a property lacking in GTR. It is further argued that the global non-conservation of energy in GTR also results from the lack of scale-invariance and the field formulation presented by several authors can only resolve the problem in part. A truly scale-invariant theory is required to avoid these two problems in a more consistent approach

M. M. Verma

2005-11-29T23:59:59.000Z

393

On scale and magnitude of pressure build-up induced by large-scale geologic storage of CO2  

SciTech Connect (OSTI)

The scale and magnitude of pressure perturbation and brine migration induced by geologic carbon sequestration is discussed assuming a full-scale deployment scenario in which enough CO{sub 2} is captured and stored to make relevant contributions to global climate change mitigation. In this scenario, the volumetric rates and cumulative volumes of CO{sub 2} injection would be comparable to or higher than those related to existing deep-subsurface injection and extraction activities, such as oil production. Large-scale pressure build-up in response to the injection may limit the dynamic storage capacity of suitable formations, because over-pressurization may fracture the caprock, may drive CO{sub 2}/brine leakage through localized pathways, and may cause induced seismicity. On the other hand, laterally extensive sedimentary basins may be less affected by such limitations because (i) local pressure effects are moderated by pressure propagation and brine displacement into regions far away from the CO{sub 2} storage domain; and (ii) diffuse and/or localized brine migration into overlying and underlying formations allows for pressure bleed-off in the vertical direction. A quick analytical estimate of the extent of pressure build-up induced by industrial-scale CO{sub 2} storage projects is presented. Also discussed are pressure perturbation and attenuation effects simulated for two representative sedimentary basins in the USA: the laterally extensive Illinois Basin and the partially compartmentalized southern San Joaquin Basin in California. These studies show that the limiting effect of pressure build-up on dynamic storage capacity is not as significant as suggested by Ehlig-Economides and Economides, who considered closed systems without any attenuation effects.

Zhou, Q.; Birkholzer, J. T.

2011-05-01T23:59:59.000Z

394

Numerical model of mixed convection heat transfer between a series of vertical parallel plates with planar heat sources  

E-Print Network [OSTI]

Heat transfer between a series of vertical parallel plates with planar heat sources has been studied numerically. The series of plates formed a series of channels, or cooling passages, in which fluid could flow. Heat dissipation from the heat...

Watson, James Christopher

2012-06-07T23:59:59.000Z

395

Film boiling on the inside of vertical tubes with upward flow of the fluid at low qualities  

E-Print Network [OSTI]

Flow regimes, local heat transfer coefficients, and temperature distributions along the wall have been studied for film boiling inside a vertical tube with upward flow of a saturated liquid. The area of interest has been ...

Dougall, R. S.

1963-01-01T23:59:59.000Z

396

Vertical composition gradient effects on original hydrocarbon in place volumes and liquid recovery for volatile oil and gas condensate reservoirs  

E-Print Network [OSTI]

Around the world, volatile oil and retrograde gas reservoirs are considered as complex thermodynamic systems and even more when they exhibit vertical composition variations. Those systems must be characterized by an equation of state (EOS...

Jaramillo Arias, Juan Manuel

2000-01-01T23:59:59.000Z

397

Thorium-234 as a tracer of spatial, temporal and vertical variability in particle flux in the North Pacific  

E-Print Network [OSTI]

Thorium-234 as a tracer of spatial, temporal and vertical variability in particle flux in the North Available online 16 April 2009 Keywords: Thorium-234 Particle flux Sediment trap Scavenging North Pacific

Siegel, David A.

398

An experimental study of heating performance and seasonal modeling of vertical U-tube ground coupled heat pumps  

E-Print Network [OSTI]

AN EXPERIMENTAL STUDY OF HEATING PERFORMANCE AND SEASONAL MODELING OF VERTICAL U-TUBE GROUND COUPLED HEAT PUMPS A Thesis by RANDAL E. MARGO Submitted to the Office of Graduate Studies of Texas A&M University in partial fulftilment... of the requirements for the degree of MASTER OF SCIENCE December 1992 Major Subject: Mechanical Engineering AN EXPERIMENTAL STUDY OF HEATING PERFORMANCE AND SEASONAL MODELING OF VERTICAL U-TUBE GROUND COUPLED HEAT PUMPS A Thesis by RANDAL E. MARGO Approved...

Margo, Randal E.

1992-01-01T23:59:59.000Z

399

Vertical distribution of larval stages of the horn fly, Haematobia irritans irritans (L.), in relation to manure pat temperature gradients  

E-Print Network [OSTI]

VERTICAL DISTRISUTION OF LARVAL STAGES OF THE HORN FLY, HAEMATOBIA IRRITANS IRRITANS (L. ), IN RELATION TO MANURE PAT TEMPERATURE GRADIENTS A Thesis by PHILIP ANDERSON MARCH Submitted to the Graduate College of Texas AijM University... in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE May 1981 Major Subject: Entomology VERTICAL DISTRIBUTION OF LARVAL STAGES OF THE HORN FLY, HAEMATOBIA IRRITANS IRRITANS (L. ), IN RELATION TO MANURE PAT TEMPERATURE GRADIENTS...

March, Philip Anderson

1981-01-01T23:59:59.000Z

400

Scale Effects in Crystal Plasticity  

E-Print Network [OSTI]

The goal of this research work is to further the understanding of crystal plasticity, particularly at reduced structural and material length scales. Fundamental understanding of plasticity is central to various challenges facing design...

Padubidri Janardhanachar, Guruprasad

2010-07-14T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Commercial Scale Wind Incentive Program  

Broader source: Energy.gov [DOE]

Energy Trust of Oregon’s Commercial Scale Wind offering provides resources and cash incentives to help communities, businesses land owners, and government entities install wind turbine systems up...

402

Electronic transport mechanisms in scaled gate-all-around silicon nanowire transistor arrays  

SciTech Connect (OSTI)

Low-frequency noise is used to study the electronic transport in arrays of 14?nm gate length vertical silicon nanowire devices. We demonstrate that, even at such scaling, the electrostatic control of the gate-all-around is sufficient in the sub-threshold voltage region to confine charges in the heart of the wire, and the extremely low noise level is comparable to that of high quality epitaxial layers. Although contact noise can already be a source of poor transistor operation above threshold voltage for few nanowires, nanowire parallelization drastically reduces its impact.

Clément, N., E-mail: nicolas.clement@iemn.univ-lille1.fr, E-mail: guilhem.larrieu@laas.fr; Han, X. L. [Institute of Electronics, Microelectronics and Nanotechnology, CNRS, Avenue Poincaré, 59652 Villeneuve d'Ascq (France)] [Institute of Electronics, Microelectronics and Nanotechnology, CNRS, Avenue Poincaré, 59652 Villeneuve d'Ascq (France); Larrieu, G., E-mail: nicolas.clement@iemn.univ-lille1.fr, E-mail: guilhem.larrieu@laas.fr [Laboratory for Analysis and Architecture of Systems (LAAS), CNRS, Universite de Toulouse, 7 Avenue Colonel Roche, 31077 Toulouse (France)

2013-12-23T23:59:59.000Z

403

GRAVITATIONAL INSTABILITY OF ROTATING, PRESSURE-CONFINED, POLYTROPIC GAS DISKS WITH VERTICAL STRATIFICATION  

SciTech Connect (OSTI)

We investigate the gravitational instability (GI) of rotating, vertically stratified, pressure-confined, polytropic gas disks using a linear stability analysis as well as analytic approximations. The disks are initially in vertical hydrostatic equilibrium and bounded by a constant external pressure. We find that the GI of a pressure-confined disk is in general a mixed mode of the conventional Jeans and distortional instabilities, and is thus an unstable version of acoustic-surface-gravity waves. The Jeans mode dominates in weakly confined disks or disks with rigid boundaries. On the other hand, when the disk has free boundaries and is strongly pressure confined, the mixed GI is dominated by the distortional mode that is surface-gravity waves driven unstable under their own gravity and thus incompressible. We demonstrate that the Jeans mode is gravity-modified acoustic waves rather than inertial waves and that inertial waves are almost unaffected by self-gravity. We derive an analytic expression for the effective sound speed c{sub eff} of acoustic-surface-gravity waves. We also find expressions for the gravity reduction factors relative to a razor-thin counterpart that are appropriate for the Jeans and distortional modes. The usual razor-thin dispersion relation, after correcting for c{sub eff} and the reduction factors, closely matches the numerical results obtained by solving a full set of linearized equations. The effective sound speed generalizes the Toomre stability parameter of the Jeans mode to allow for the mixed GI of vertically stratified, pressure-confined disks.

Kim, Jeong-Gyu; Kim, Woong-Tae [Center for the Exploration of the Origin of the Universe (CEOU), Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 151-742 (Korea, Republic of); Seo, Young Min; Hong, Seung Soo, E-mail: jgkim@astro.snu.ac.kr, E-mail: wkim@astro.snu.ac.kr, E-mail: seo3919@email.arizona.edu, E-mail: sshong@astro.snu.ac.kr [FPRD, Department of Physics and Astronomy, Seoul National University, Seoul 151-742 (Korea, Republic of)

2012-12-20T23:59:59.000Z

404

Vertical and horizontal test results of 3.9-GHz accelerating cavities at FNAL  

SciTech Connect (OSTI)

The 3rd harmonic 3.9GHz accelerating cavity was proposed to improve the beam performance of the VUV FEL, FLASH. In the frame of a collaborative agreement, Fermilab will provide DESY with a cryomodule containing a string of four cavities. Seven 9-cell Nb cavities were tested and six of them did reach accelerating gradient up to 24 MV/m almost twice more than design value of 14 MV/m. Two of these cavities are with new HOM couplers with improved design. In this paper we present all results of the vertical and horizontal tests.

Khabiboulline, T.; Edwards, H.; Foley, M.; Harms, E.; Hocker, James Andrew; Mitchell, D.; Rowe, A.; Solyak, N.; /Fermilab

2008-06-01T23:59:59.000Z

405

High performance vertical tunneling diodes using graphene/hexagonal boron nitride/graphene hetero-structure  

SciTech Connect (OSTI)

A tunneling rectifier prepared from vertically stacked two-dimensional (2D) materials composed of chemically doped graphene electrodes and hexagonal boron nitride (h-BN) tunneling barrier was demonstrated. The asymmetric chemical doping to graphene with linear dispersion property induces rectifying behavior effectively, by facilitating Fowler-Nordheim tunneling at high forward biases. It results in excellent diode performances of a hetero-structured graphene/h-BN/graphene tunneling diode, with an asymmetric factor exceeding 1000, a nonlinearity of ?40, and a peak sensitivity of ?12?V{sup ?1}, which are superior to contending metal-insulator-metal diodes, showing great potential for future flexible and transparent electronic devices.

Hwan Lee, Seung; Lee, Jia; Ho Ra, Chang; Liu, Xiaochi; Hwang, Euyheon [Samsung-SKKU Graphene Center (SSGC), Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 440-746 (Korea, Republic of); Department of Nano Science and Technology, SKKU Advanced Institute of Nano-Technology (SAINT), Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 440-746 (Korea, Republic of); Sup Choi, Min [Department of Nano Science and Technology, SKKU Advanced Institute of Nano-Technology (SAINT), Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 440-746 (Korea, Republic of); Center for Human Interface Nano Technology (HINT), Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 440-746 (Korea, Republic of); Hee Choi, Jun [Frontier Research Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Yongin, Gyeonggi-do 446-711 (Korea, Republic of); Zhong, Jianqiang; Chen, Wei [Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore); Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543 (Singapore); Jong Yoo, Won, E-mail: yoowj@skku.edu [Samsung-SKKU Graphene Center (SSGC), Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 440-746 (Korea, Republic of); Department of Nano Science and Technology, SKKU Advanced Institute of Nano-Technology (SAINT), Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 440-746 (Korea, Republic of); Center for Human Interface Nano Technology (HINT), Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 440-746 (Korea, Republic of)

2014-02-03T23:59:59.000Z

406

Method and apparatus for drilling horizontal holes in geological structures from a vertical bore  

DOE Patents [OSTI]

This invention is directed to a method and apparatus for drilling horizontal holes in geological strata from a vertical position. The geological structures intended to be penetrated in this fashion are coal seams, as for in situ gasification or methane drainage, or in oil-bearing strata for increasing the flow rate from a pre-existing well. Other possible uses for this device might be for use in the leaching of uranium ore from underground deposits or for introducing horizontal channels for water and steam injections.

Summers, David A. (Rolla, MO); Barker, Clark R. (Rolla, MO); Keith, H. Dean (Rolla, MO)

1982-01-01T23:59:59.000Z

407

Formation and transportation of sand-heap in an inclined and vertically vibrated container  

E-Print Network [OSTI]

We report the experimental findings of formation and motion of heap in granular materials in an inclined and vertically vibrated container. We show experimentally how the transport velocity of heap up container is related to the driving acceleration as well as the driving frequency of exciter. An analogous experiment was performed with a heap-shaped Plexiglas block. We propose that cohesion force resulted from pressure gradient in ambient gas plays a crucial role in enhancing and maintaining a heap, and ratchet effect causes the movement of the heap. An equation which governs the transport velocity of the heap is presented.

Guoqing Miao; Kai Huang; Yi Yun; Peng Zhang; Weizhong Chen; Xinlong Wang; Rongjue Wei

2005-11-29T23:59:59.000Z

408

Method for accurate growth of vertical-cavity surface-emitting lasers  

DOE Patents [OSTI]

We report a method for accurate growth of vertical-cavity surface-emitting lasers (VCSELs). The method uses a single reflectivity spectrum measurement to determine the structure of the partially completed VCSEL at a critical point of growth. This information, along with the extracted growth rates, allows imprecisions in growth parameters to be compensated for during growth of the remaining structure, which can then be completed with very accurate critical dimensions. Using this method, we can now routinely grow lasing VCSELs with Fabry-Perot cavity resonance wavelengths controlled to within 0.5%.

Chalmers, Scott A. (Albuquerque, NM); Killeen, Kevin P. (Albuquerque, NM); Lear, Kevin L. (Albuquerque, NM)

1995-01-01T23:59:59.000Z

409

Method for accurate growth of vertical-cavity surface-emitting lasers  

DOE Patents [OSTI]

The authors report a method for accurate growth of vertical-cavity surface-emitting lasers (VCSELs). The method uses a single reflectivity spectrum measurement to determine the structure of the partially completed VCSEL at a critical point of growth. This information, along with the extracted growth rates, allows imprecisions in growth parameters to be compensated for during growth of the remaining structure, which can then be completed with very accurate critical dimensions. Using this method, they can now routinely grow lasing VCSELs with Fabry-Perot cavity resonance wavelengths controlled to within 0.5%. 4 figs.

Chalmers, S.A.; Killeen, K.P.; Lear, K.L.

1995-03-14T23:59:59.000Z

410

Efficient vertical coupling of photodiodes to InGaAsP rib waveguides  

SciTech Connect (OSTI)

We demonstrate vertical integration of InGaAs mesa photodiodes with InGaAsP rib waveguides employing an intermediate optical impedance matching layer. The diode length necessary for 90% light absorption at 1.52 {mu}m wavelength was 42 {mu}m, a threefold reduction in diode length with respect to previous work employing similar waveguides without a matching layer. The quantum efficiency was observed to be almost independent of the optical wavelength and polarization. The influence of spatial transient intensity redistribution effects on these devices is investigated in detail.

Deri, R.J.; Doldissen, W.; Hawkins, R.J.; Bhat, R.; Soole, J.B.D.; Schiavone, L.M.; Seto, M.; Andreadakis, N.; Silberberg, Y.; Koza, M.A. (Bellcore, 331 Newman Springs Road, Red Bank, New Jersey 07701-7040 (USA))

1991-06-17T23:59:59.000Z

411

Vertical Variability of Aerosols and Water Vapor Over the Southern Great Plains  

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

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412

Electron Backscatter Diffraction of a Ge Growth Tip from a Vertical  

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 Nanoparticles as Selective Sorbents . |of ZnOdensityVertical

413

CFD Validation of Gas Injection in Flowing Mercury over Vertical Smooth and Grooved Wall  

SciTech Connect (OSTI)

The Spallation Neutron Source (SNS) is an accelerator-based neutron source at Oak Ridge National Laboratory (ORNL).The nuclear spallation reaction occurs when a proton beam hits liquid mercury. This interaction causes thermal expansion of the liquid mercury which produces high pressure waves. When these pressure waves hit the target vessel wall, cavitation can occur and erode the wall. Research and development efforts at SNS include creation of a vertical protective gas layer between the flowing liquid mercury and target vessel wall to mitigate the cavitation damage erosion and extend the life time of the target. Since mercury is opaque, computational fluid dynamics (CFD) can be used as a diagnostic tool to see inside the liquid mercury and guide the experimental efforts. In this study, CFD simulations of three dimensional, unsteady, turbulent, two-phase flow of helium gas injection in flowing liquid mercury over smooth, vertically grooved and horizontally grooved walls are carried out with the commercially available CFD code Fluent-12 from ANSYS. The Volume of Fluid (VOF) model is used to track the helium-mercury interface. V-shaped vertical and horizontal grooves with 0.5 mm pitch and about 0.7 mm depth were machined in the transparent wall of acrylic test sections. Flow visualization data of helium gas coverage through transparent test sections is obtained with a high-speed camera at the ORNL target test facility (TTF). The helium gas mass flow rate is 8 mg/min and introduced through a 0.5 mm diameter port. The local mercury velocity is 0.9 m/s. In this paper, the helium gas flow rate and the local mercury velocity are kept constant for the three cases. Time integration of predicted helium gas volume fraction over time is done to evaluate the gas coverage and calculate the average thickness of the helium gas layer. The predicted time-integrated gas coverage over vertically grooved and horizontally grooved test sections is better than over a smooth wall. The simulations show that the helium gas is trapped inside the grooves. The predicted time-averaged gas coverage is in good qualitative agreement with the measured gas coverage.

Abdou, Ashraf A [ORNL; Wendel, Mark W [ORNL; Felde, David K [ORNL; Riemer, Bernie [ORNL

2009-01-01T23:59:59.000Z

414

ARM - Different Climates  

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 May JunDatastreamsmmcrcal Documentation DataDatastreamswacrspeccmaskcopolDatastreamsxsacrslrAlaskaDefensive Shotgun -ListDifferent Climates

415

Quantum electrodynamics with anisotropic scaling: Heisenberg-Euler action and Schwinger pair production in the bilayer graphene  

E-Print Network [OSTI]

We discuss quantum electrodynamics emerging in the vacua with anisotropic scaling. Systems with anisotropic scaling were suggested by Horava in relation to the quantum theory of gravity. In such vacua the space and time are not equivalent, and moreover they obey different scaling laws, called the anisotropic scaling. Such anisotropic scaling takes place for fermions in bilayer graphene, where if one neglects the trigonal warping effects the massless Dirac fermions have quadratic dispersion. This results in the anisotropic quantum electrodynamics, in which electric and magnetic fields obey different scaling laws. Here we discuss the Heisenberg-Euler action and Schwinger pair production in such anisotropic QED

M. I. Katsnelson; G. E. Volovik

2012-03-19T23:59:59.000Z

416

Influence by small dispersive coal dust particles of different fractional consistence on characteristics of iodine air filter at nuclear power plant  

E-Print Network [OSTI]

The main purpose of research is to determine the influence by the small dispersive coal dust particles of the different fractional consistence on the technical characteristics of the vertical iodine air filter at nuclear power plant. The research on the transport properties of the small dispersive coal dust particles in the granular filtering medium of absorber in the vertical iodine air filter is completed in the case, when the modeled aerodynamic conditions are similar to the real aerodynamic conditions. It is shown that the appearance of the different fractional consistence of small dispersive coal dust particles with the decreasing dimensions down to the micro and nano sizes at the action of the air dust aerosol stream normally results in a significant change of distribution of the small dispersive coal dust particles masses in the granular filtering medium of an absorber in the vertical iodine air filter, changing the vertical iodine air filter aerodynamic characteristics. The precise characterization of the aerodynamic resistance of a model of the vertical iodine air filter is completed. The comparative analysis of the technical characteristics of the vertical and horizontal iodine air filters is also made.

I. M. Neklyudov; O. P. Ledenyov; L. I. Fedorova; P. Ya. Poltinin

2013-02-18T23:59:59.000Z

417

Linearly Scaling 3D Fragment Method for Large-Scale Electronic Structure Calculations  

SciTech Connect (OSTI)

We present a new linearly scaling three-dimensional fragment (LS3DF) method for large scale ab initio electronic structure calculations. LS3DF is based on a divide-and-conquer approach, which incorporates a novel patching scheme that effectively cancels out the artificial boundary effects due to the subdivision of the system. As a consequence, the LS3DF program yields essentially the same results as direct density functional theory (DFT) calculations. The fragments of the LS3DF algorithm can be calculated separately with different groups of processors. This leads to almost perfect parallelization on tens of thousands of processors. After code optimization, we were able to achieve 35.1 Tflop/s, which is 39percent of the theoretical speed on 17,280 Cray XT4 processor cores. Our 13,824-atom ZnTeO alloy calculation runs 400 times faster than a direct DFTcalculation, even presuming that the direct DFT calculation can scale well up to 17,280 processor cores. These results demonstrate the applicability of the LS3DF method to material simulations, the advantage of using linearly scaling algorithms over conventional O(N3) methods, and the potential for petascale computation using the LS3DF method.

Wang, Lin-Wang; Lee, Byounghak; Shan, Hongzhang; Zhao, Zhengji; Meza, Juan; Strohmaier, Erich; Bailey, David H.

2008-07-01T23:59:59.000Z

418

New vertical cryostat for the high field superconducting magnet test station at CERN  

SciTech Connect (OSTI)

In the framework of the R and D program for new superconducting magnets for the Large Hadron Collider accelerator upgrades, CERN is building a new vertical test station to test high field superconducting magnets of unprecedented large size. This facility will allow testing of magnets by vertical insertion in a pressurized liquid helium bath, cooled to a controlled temperature between 4.2 K and 1.9 K. The dimensions of the cryostat will allow testing magnets of up to 2.5 m in length with a maximum diameter of 1.5 m and a mass of 15 tons. To allow for a faster insertion and removal of the magnets and reducing the risk of helium leaks, all cryogenics supply lines are foreseen to remain permanently connected to the cryostat. A specifically designed 100 W heat exchanger is integrated in the cryostat helium vessel for a controlled cooling of the magnet from 4.2 K down to 1.9 K in a 3 m{sup 3} helium bath. This paper describes the cryostat and its main functions, focusing on features specifically developed for this project. The status of the construction and the plans for assembly and installation at CERN are also presented.

Vande Craen, A.; Atieh, S.; Bajko, M.; Benda, V.; Rijk, G. de; Favre, G.; Giloux, C.; Minginette, P.; Parma, V.; Perret, P.; Pirotte, O.; Ramos, D.; Viret, P. [CERN European Organization for Nuclear Research, Meyrin 1211, Geneva 23, CH (Switzerland); Hanzelka, P. [Institute of Scientific Instruments of the ASCR, Kralovopolska 147, 612 64 Brno, CZ (Czech Republic)

2014-01-29T23:59:59.000Z

419

Vertical Structure of Neutrino Dominated Accretion Disks and Neutrino Transport in the disks  

E-Print Network [OSTI]

We investigate the vertical structure of neutrino dominated accretion disks by self-consistently considering the detailed microphysics, such as the neutrino transport, vertical hydrostatic equilibrium, the conservation of lepton number, as well as the balance between neutrino cooling, advection cooling and viscosity heating. After obtaining the emitting spectra of neutrinos and antineutrinos by solving the one dimensional Boltzmann equation of neutrino and antineutrino transport in the disk, we calculate the neutrino/antineutrino luminosity and their annihilation luminosity. We find that the total neutrino and antineutrino luminosity is about $10^{54}$ ergs/s and their annihilation luminosity is about $5\\times10^{51}$ ergs/s with an extreme accretion rate $10 M_{\\rm {sun}}$/s and an alpha viscosity $\\alpha=0.1$. In addition, we find that the annihilation luminosity is sensitive to the accretion rate and will not exceed $10^{50}$ ergs/s which is not sufficient to power the most fireball of GRBs, if the accretion rate is lower than $1 M_{\\rm {sun}}$/s. Therefore, the effects of the spin of black hole or/and the magnetic field in the accretion flow might be introduced to power the central engine of GRBs.

Zhen Pan; Ye-Fei Yuan

2012-09-06T23:59:59.000Z

420

PARTICLES OF DIFFERENCE.  

SciTech Connect (OSTI)

It is no longer appropriate, if it ever was, to think of atmospheric aerosols as homogeneous spheres of uniform composition and size. Within the United States, and even more globally, not only the mass loading but also the composition, morphology, and size distribution of atmospheric aerosols are highly variable, as a function of location, and at a given location as a function of time. Particles of a given aerodynamic size may differ from one another, and even within individual particles material may be inhomogeneously distributed, as for example, carbon spherules imbedded in much larger sulfate particles. Some of the particulate matter is primary, that is, introduced into the atmosphere directly as particles, such as carbon particles in diesel exhaust. Some is secondary, that is, formed in the atmosphere by gas-to-particle conversion. Much of the material is inorganic, mainly sulfates and nitrates resulting mainly from energy-related emissions. Some of the material is carbonaceous, in part primary, in part secondary, and of this material some is anthropogenic and some biogenic. While the heterogeneity of atmospheric aerosols complicates the problem of understanding their loading and distribution, it may well be the key to its solution. By detailed examination of the materials comprising aerosols it is possible to infer the sources of these materials. It may be possible as well to identify specific health impairing agents. The heterogeneity of aerosol particles is thus the key to identifying their sources, to understanding the processes that govern their loading and properties, and to devising control strategies that are both effective and efficient. Future research must therefore take cognizance of differences among aerosol particles and use these differences to advantage.

SCHWARTZ,S.E.

2000-09-21T23:59:59.000Z

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421

The Filter Difference Spectrometer  

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

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422

Intra-canopy variability of fruit growth rate in peach trees grafted on rootstocks with different vigour-control capacity  

E-Print Network [OSTI]

Intra-canopy variability of fruit growth rate in peach trees grafted on rootstocks with different research was to study intra-canopy variability in fruit growth under conditions of low fruit-to- fruit vertically into five layers.The diameter of 12 fruit per canopy layer was measured early in the growing

DeJong, Theodore

423

Physical meaning of one-machine and multimachine tokamak scalings  

SciTech Connect (OSTI)

Specific features of energy confinement scalings constructed using different experimental databases for tokamak plasmas are considered. In the multimachine database, some pairs of engineering variables are collinear; e.g., the current I and the input power P both increase with increasing minor radius a. As a result, scalings derived from this database are reliable only for discharges in which such ratios as I/a{sup 2} or P/a{sup 2} are close to their values averaged over the database. The collinearity of variables allows one to exclude the normalized Debye radius d* from the scaling expressed in a nondimensional form. In one-machine databases, the dimensionless variables are functionally dependent, which allow one to cast a scaling without d*. In a database combined from two devices, the collinearity may be absent, so the Debye radius cannot generally be excluded from the scaling. It is shown that the experiments performed in support of the absence of d* in the two-machine scaling are unconvincing. Transformation expressions are given that allow one to compare experiments for the determination of scaling in any set of independent variables.

Dnestrovskij, Yu. N., E-mail: dnyn@nfi.kiae.ru; Danilov, A. V.; Dnestrovskij, A. Yu.; Lysenko, S. E. [National Research Centre Kurchatov Institute, Institute of Tokamak Physics (Russian Federation)] [National Research Centre Kurchatov Institute, Institute of Tokamak Physics (Russian Federation); Ongena, J. [Euratom-Belgium State Association, Laboratory for Plasma Physics (Belgium)] [Euratom-Belgium State Association, Laboratory for Plasma Physics (Belgium)

2013-04-15T23:59:59.000Z

424

Nonlinear closures for scale separation in supersonic magnetohydrodynamic turbulence  

E-Print Network [OSTI]

Turbulence in compressible plasma plays a key role in many areas of astrophysics and engineering. The extreme plasma parameters in these environments, e.g. high Reynolds numbers, supersonic and super-Alfvenic flows, however, make direct numerical simulations computationally intractable even for the simplest treatment -- magnetohydrodynamics (MHD). To overcome this problem one can use subgrid-scale (SGS) closures -- models for the influence of unresolved, subgrid-scales on the resolved ones. In this work we propose and validate a set of constant coefficient closures for the resolved, compressible, ideal MHD equations. The subgrid-scale energies are modeled by Smagorinsky-like equilibrium closures. The turbulent stresses and the electromotive force (EMF) are described by expressions that are nonlinear in terms of large scale velocity and magnetic field gradients. To verify the closures we conduct a priori tests over 137 simulation snapshots from two different codes with varying ratios of thermal to magnetic pre...

Grete, Philipp; Schmidt, Wolfram; Schleicher, Dominik R G; Federrath, Christoph

2015-01-01T23:59:59.000Z

425

Turbulence Effects at Small Scales  

E-Print Network [OSTI]

It is most natural to assume that mysterious Small Ionized and Neutral Structures (SINS) indiffuse ISM arise from turbulence. There are two obvious problem with such an explanation, however. First of all, it is generally believed that at the small scales turbulence should be damped. Second, turbulence with Kolmogorov spectrum cannot be the responsible for the SINS. We consider, however, effects, that provide spectral index flatter than the Kolmogorov one and allow action at very small scales. These are the shocks that arise in high Mach number turbulence and transfer of energy to small scales by instabilities in cosmic rays. Our examples indicate that the origin of SINS may be discovered through systematic studies of astrophysical turbulence.

A. Beresnyak; A. Lazarian

2006-10-26T23:59:59.000Z

426

Social Scaling: From scale-free to stretched exponential models for scalar stress, hierarchy, levels and units in human and technological networks and evolution1  

E-Print Network [OSTI]

at different levels to reduce information and energy load by substituting relationships among leaders. These characteristics of scale-free modeling have been successful in biology, and social scaling may well follow from individuals to groups as a way of renormalizing information load with respect to human attentional

White, Douglas R.

427

LONG-TERM DYNAMICS OF RADIONUCLIDE VERTICAL MIGRATION IN SOILS OF THE CHERNOBYL NUCLEAR POWER PLANT EXCLUSION ZONE  

SciTech Connect (OSTI)

The radioactive fallout from the Chernobyl Nuclear Power Plant (ChNPP) accident consisted of fuel and condensation components. An important radioecological task associated with the late phase of the accident is to evaluate the dynamics of radionuclide mobility in soils. Identification of the variability (or invariability) in the radionuclide transfer parameters makes it possible to (1) accurately predict migration patterns and biological availability of radionuclides and (2) evaluate long-term exposure trends for the population who may reoccupy the remediated abandoned areas. In 1986-1987, a number of experimental plots were established within various tracts of the fallout plume to assist with the determination of the long-term dynamics of radionuclide vertical migration in the soils. The transfer parameters for {sup 137}Cs, {sup 90}Sr, and {sup 239,240}Pu in the soil profile, as well as their ecological half-time of the radionuclide residence (T{sub 1/2}{sup ecol}) values in the upper 5-cm thick soil layers of different grasslands were estimated at various times since the accident. Migration characteristics in the grassland soils tend to decrease as follows: {sup 90}Sr > {sup 137}Cs {ge} {sup 239,240}Pu. It was found that the {sup 137}Cs absolute T{sub 1/2}{sup ecol} values are 3-7 times higher than its radioactive decay half-life value. Therefore, changes in the exposure dose resulting from the soil deposited {sup 137}Cs now depend only on its radioactive decay. The {sup 90}Sr T{sub 1/2}{sup ecol} values for the 21st year after the fallout tend to decrease, indicating an intensification of its migration capabilities. This trend appears consistent with a pool of mobile {sup 90}Sr forms that grows over time due to destruction of the fuel particles.

Farfan, E.

2009-11-19T23:59:59.000Z

428

ATMOSPHERIC PHYSICS AS OBSERVED BY A VERTICALLY POINTING DOPPLER RADAR Frdric Fabry, and Isztar Zawadzki  

E-Print Network [OSTI]

and precipitation physics and small scale dynamics. We find that many of these images would make wonderful textbook resolution the reflectivity patterns of precipitation (Fabry et al. 1992), the VPR has been upgraded

Fabry, Frederic

429

Scaling studies and conceptual experiment designs for NGNP CFD assessment  

SciTech Connect (OSTI)

The objective of this report is to document scaling studies and conceptual designs for flow and heat transfer experiments intended to assess CFD codes and their turbulence models proposed for application to prismatic NGNP concepts. The general approach of the project is to develop new benchmark experiments for assessment in parallel with CFD and coupled CFD/systems code calculations for the same geometry. Two aspects of the complex flow in an NGNP are being addressed: (1) flow and thermal mixing in the lower plenum ("hot streaking" issue) and (2) turbulence and resulting temperature distributions in reactor cooling channels ("hot channel" issue). Current prismatic NGNP concepts are being examined to identify their proposed flow conditions and geometries over the range from normal operation to decay heat removal in a pressurized cooldown. Approximate analyses have been applied to determine key non-dimensional parameters and their magnitudes over this operating range. For normal operation, the flow in the coolant channels can be considered to be dominant turbulent forced convection with slight transverse property variation. In a pressurized cooldown (LOFA) simulation, the flow quickly becomes laminar with some possible buoyancy influences. The flow in the lower plenum can locally be considered to be a situation of multiple hot jets into a confined crossflow -- with obstructions. Flow is expected to be turbulent with momentumdominated turbulent jets entering; buoyancy influences are estimated to be negligible in normal full power operation. Experiments are needed for the combined features of the lower plenum flows. Missing from the typical jet experiments available are interactions with nearby circular posts and with vertical posts in the vicinity of vertical walls - with near stagnant surroundings at one extreme and significant crossflow at the other. Two types of heat transfer experiments are being considered. One addresses the "hot channel" problem, if necessary. The second type will treat heated jets entering a model plenum. Unheated MIR (Matched-Index-of-Refraction) experiments are first steps when the geometry is complicated. One does not want to use a computational technique which will not even handle constant properties properly. The purpose of the fluid dynamics experiments is to develop benchmark databases for the assessment of CFD solutions of the momentum equations, scalar mixing and turbulence models for typical NGNP plenum geometries in the limiting case of negligible buoyancy and constant fluid properties. As indicated by the scaling studies, in normal full power operation of a typical NGNP conceptual design, buoyancy influences should be negligible in the lower plenum. The MIR experiment will simulate flow features of the paths of jets as they mix in flowing through the array of posts in a lower plenum en route to the single exit duct. Conceptual designs for such experiments are described.

D. M. McEligot; G. E. McCreery

2004-11-01T23:59:59.000Z

430

Unscaled Scaled (% / km) Geographic Area /  

E-Print Network [OSTI]

226 Unscaled Scaled (% / km) Geographic Area / Assessment Unit DI Prod. N(eq) Sum Total Cumu subbasin, Washington. Geographic Area / Assessment Unit IntegratedPriorityRestoration Category Habitat% (unscaled results) of the combined protection benefit for summer steelhead within the Methow basin, and 51

431

Scaling the Web Composing Web  

E-Print Network [OSTI]

Scaling the Web Composing Web Services:A QoS View A n Internet application can invoke several ser- vices -- a stock-trading Web service, for example, could invoke a payment service, which could then invoke an authentication service. Such a scenario is called a composite Web service, and it can

Menascé, Daniel A.

432

Photonic nanojet-enhanced nanometer-scale germanium photodiode  

E-Print Network [OSTI]

Photonic nanojet-enhanced nanometer-scale germanium photodiode Mehdi Hasan and Jamesina J. Simpson 24 July 2013 A design challenge for photodiodes yielding both high speed and responsivity is proposed, focusing electromagnetic energy into a photodiode. Three-dimensional finite-difference time

Simpson, Jamesina J.

433

ARE DEICING SALTS NECESSARY TO PROMOTE SCALING IN CONCRETE?  

E-Print Network [OSTI]

. Keywords: Concrete, cryosuction, durability, frost, poromechanics, porous media, thermo- dynamics, spallingARE DEICING SALTS NECESSARY TO PROMOTE SCALING IN CONCRETE? A. Fabbri1,2 , O. Coussy1 , T. Fen of the different phases that form the porous material. It eventually predicts that a less perme- able sample

Paris-Sud XI, Université de

434

Chemical cytometry on a picoliter-scale integrated microfluidic chip  

E-Print Network [OSTI]

Chemical cytometry on a picoliter-scale integrated microfluidic chip Hongkai Wu, Aaron Wheeler the chemical contents of a single cell (chemical cytometry). The device is designed to accomplish four different functions: (i) cell handling, (ii) metering and delivering of chemical reagents, (iii) cell lysis

Zare, Richard N.

435

Gypsum scale formation on a heated copper plate under natural convection conditions and produced water remediation technologies review .  

E-Print Network [OSTI]

??Scaling or crystallization fouling of unwanted salts is one of the most challenging and expensive problems encountered in different applications such as heat exchangers and… (more)

Mirhi, Mohamad H. (Mohamad Hussein)

2013-01-01T23:59:59.000Z

436

Vertical Drop of the Naval SNF Long Waste Package On Unyielding Surface  

SciTech Connect (OSTI)

The purpose of this calculation is to determine the structural response of a Naval SNF (Spent Nuclear Fuel) Long Waste Package (WP) subjected to 2 m-vertical drop on unyielding surface (US). The scope of this document is limited to reporting the calculation results in terms of maximum stress intensities. This calculation is associated with the waste package design; calculation is performed by the Waste Package Design group. AP-3.12Q, Revision 0, ICN 0, Calculations, is used to perform the calculation and develop the document. The finite element calculation is performed by using the commercially available ANSYS Version (V) 5.4 finite element code. The result of this calculation is provided in terms of maximum stress intensities.

S. Mastilovic

2006-07-21T23:59:59.000Z

437

Investigation of the GaN-on-GaAs interface for vertical power device applications  

SciTech Connect (OSTI)

GaN layers were grown onto (111) GaAs by molecular beam epitaxy. Minimal band offset between the conduction bands for GaN and GaAs materials has been suggested in the literature raising the possibility of using GaN-on-GaAs for vertical power device applications. I-V and C-V measurements of the GaN/GaAs heterostructures however yielded a rectifying junction, even when both sides of the junction were heavily doped with an n-type dopant. Transmission electron microscopy analysis further confirmed the challenge in creating a GaN/GaAs Ohmic interface by showing a large density of dislocations in the GaN layer and suggesting roughening of the GaN/GaAs interface due to etching of the GaAs by the nitrogen plasma, diffusion of nitrogen or melting of Ga into the GaAs substrate.

Möreke, Janina, E-mail: janina.moereke@bristol.ac.uk; Uren, Michael J.; Kuball, Martin [H.H. Wills Physics Laboratory, Tyndall Avenue, Bristol BS8 1TL (United Kingdom); Novikov, Sergei V.; Foxon, C. Thomas [Department of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD (United Kingdom); Hosseini Vajargah, Shahrzad; Wallis, David J.; Humphreys, Colin J. [Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS (United Kingdom); Haigh, Sarah J. [Super STEM Laboratory, STFC Daresbury Campus, Keckwick Lane, Daresbury WA4 4AD (United Kingdom); School of Materials, University of Manchester, Manchester M13 9PL (United Kingdom); Al-Khalidi, Abdullah; Wasige, Edward; Thayne, Iain [School of Engineering, University of Glasgow, Rankine Bldg, Oakfield Avenue, Glasgow G12 8LT (United Kingdom)

2014-07-07T23:59:59.000Z

438

Vertically aligned gas-insulated transmission line having particle traps at the inner conductor  

DOE Patents [OSTI]

Gas insulated electrical apparatus having first and second conductors separated by an insulating support within an insulating gas environment, and particle traps disposed along the surface of the high potential conductor for trapping and inactivating foreign particles which may be present within the insulating gas medium. Several embodiments of the invention were developed which are particularly suited for vertically aligned gas insulated transmission lines. The particle traps are grooves or cavities formed into the walls of the tubular inner conductor, without extending into the hollow portion of the conductor. In other embodiments, the traps are appendages or insert flanges extending from the inner conductor, with the insulator supports contacting the appendages instead of the inner conductor.

Dale, Steinar J. (Monroeville, PA)

1984-01-01T23:59:59.000Z

439

Fish schooling as a basis for vertical axis wind turbine farm design  

E-Print Network [OSTI]

Most wind farms consist of horizontal axis wind turbines (HAWTs) due to the high power coefficient (mechanical power output divided by the power of the free-stream air through the turbine cross-sectional area) of an isolated turbine. However when in close proximity to neighbouring turbines, HAWTs suffer from a reduced power coefficient. In contrast, previous research on vertical axis wind turbines (VAWTs) suggests that closely-spaced VAWTs may experience only small decreases (or even increases) in an individual turbine's power coefficient when placed in close proximity to neighbours, thus yielding much higher power outputs for a given area of land. A potential flow model of inter-VAWT interactions is developed to investigate the effect of changes in VAWT spatial arrangement on the array performance coefficient, which compares the expected average power coefficient of turbines in an array to a spatially-isolated turbine. A geometric arrangement based on the configuration of shed vortices in the wake of schooli...

Whittlesey, Robert W; Dabiri, John O

2010-01-01T23:59:59.000Z

440

Frequency-doubled vertical-external-cavity surface-emitting laser  

DOE Patents [OSTI]

A frequency-doubled semiconductor vertical-external-cavity surface-emitting laser (VECSEL) is disclosed for generating light at a wavelength in the range of 300-550 nanometers. The VECSEL includes a semiconductor multi-quantum-well active region that is electrically or optically pumped to generate lasing at a fundamental wavelength in the range of 600-1100 nanometers. An intracavity nonlinear frequency-doubling crystal then converts the fundamental lasing into a second-harmonic output beam. With optical pumping with 330 milliWatts from a semiconductor diode pump laser, about 5 milliWatts or more of blue light can be generated at 490 nm. The device has applications for high-density optical data storage and retrieval, laser printing, optical image projection, chemical-sensing, materials processing and optical metrology.

Raymond, Thomas D. (Edgewood, NM); Alford, William J. (Albuquerque, NM); Crawford, Mary H. (Albuquerque, NM); Allerman, Andrew A. (Albuquerque, NM)

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Cryogenic Etching of Silicon: An Alternative Method for Fabrication of Vertical Microcantilever Master Molds  

SciTech Connect (OSTI)

This paper examines the use of deep reactive ion etching of silicon with fluorine high-density plasmas at cryogenic temperatures to produce silicon master molds for vertical microcantilever arrays used for controlling substrate stiffness for culturing living cells. The resultant profiles achieved depend on the rate of deposition and etching of an SiO{sub x}F{sub y} polymer, which serves as a passivation layer on the sidewalls of the etched structures in relation to areas that have not been passivated with the polymer. We look at how optimal tuning of two parameters, the O{sub 2} flow rate and the capacitively coupled plasma power, determine the etch profile. All other pertinent parameters are kept constant. We examine the etch profiles produced using electron-beam resist as the main etch mask, with holes having diameters of 750 nm, 1 ??m , and 2 ??m.

Thomas, Darrell Keith [ORNL; Lavrik, Nickolay V [ORNL

2010-01-01T23:59:59.000Z

442

Visualization of Large-Scale Distributed Data  

E-Print Network [OSTI]

that are now considered the "lenses" for examining large-scale data. THE LARGE-SCALE DATA VISUALIZATIONVisualization of Large-Scale Distributed Data Jason Leigh1 , Andrew Johnson1 , Luc Renambot1 representation of data and the interactive manipulation and querying of the visualization. Large-scale data

Johnson, Andrew

443

Brane World Models Need Low String Scale  

E-Print Network [OSTI]

Models with large extra dimensions offer the possibility of the Planck scale being of order the electroweak scale, thus alleviating the gauge hierarchy problem. We show that these models suffer from a breakdown of unitarity at around three quarters of the low effective Planck scale. An obvious candidate to fix the unitarity problem is string theory. We therefore argue that it is necessary for the string scale to appear below the effective Planck scale and that the first signature of such models would be string resonances. We further translate experimental bounds on the string scale into bounds on the effective Planck scale.

Antoniadis, Ignatios; Calmet, Xavier

2011-01-01T23:59:59.000Z

444

Velocity and temperature distribution of air in the boundary layer of a vertical plate for free-convective heat transfer  

E-Print Network [OSTI]

against the nozzle and clamped to. a stand in such a way that its vertical position could be, set. as desired. Hot-Wire Anemometer A Plow Corporation Model HWB2 hot wire anemometer was used in connection with a single, filament, probe to measure...VELOCITY AND TEMPERATURE DISTRIBUTION OF AIR IN THE BOUNDARY LAYER OF A VERTICAL PLATE FOR FREE-CONVECTIVE HEAT TRANSFER A Thesis By JEAN MAXIME JOSE JULLIENNE Submitted to . the . Graduate School of the Agricultural. and Mechanical. College...

Jullienne, Jean Maxime Jose

2012-06-07T23:59:59.000Z

445

Using computerized tomography to determine ionospheric structures. Part 2, A method using curved paths to increase vertical resolution  

SciTech Connect (OSTI)

A method is presented to unfold the two-dimensional vertical structure in electron density by using data on the total electron content for a series of paths through the ionosphere. The method uses a set of orthonormal basis functions to represent the vertical structure and takes advantage of curved paths and the eikonical equation to reduce the number of iterations required for a solution. Curved paths allow a more thorough probing of the ionosphere with a given set of transmitter and receiver positions. The approach can be directly extended to more complex geometries.

Vittitoe, C.N.

1993-08-01T23:59:59.000Z

446

A photoelastic study of simply supported rectangular beams with holes on the vertical center lines and subjected to concentrated loads  

E-Print Network [OSTI]

Page 1 Stress Concentration Factors for Various Points for the Beams of this Study . 33 LIST OF FIGURES Figure Page Dimensions of the Models Model in the Loading Frame Fringe Pattern of Beam 1. Isoclinics for Beam L-1 Isoclinics for Beam S-1 10... Calibration of Model for Beam 1 Sketch of a Beam Showing: (a) Locations of sections under consideration (b) dX, b Y, he, S, S, and the sign convention for r xy Horizontal and Vertical Stresses for Beam 1 13 22 Horizontal and Vertical Stresses for Beam...

Lin, Ping Hua

1965-01-01T23:59:59.000Z

447

Two-stage epitaxial growth of vertically-aligned SnO2 nano-rods on(001) ceria  

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

Growth of high-aspect ratio oriented tin oxide, SnO2, nano-rods is complicated by a limited choice of matching substrates. We show that a (001) cerium oxide, CeO2, surface uniquely enables epitaxial growth of tin-oxide nano-rods via a two-stage process. First, (100) oriented nano-wires coat the ceria surface by lateral growth, forming a uniaxially-textured SnO2 deposit. Second, vertical SnO2nano-rods nucleate on the deposit by homoepitaxy. We demonstrate growth of vertically oriented 1-2 ?m long nano-rods with an average diameter of ?20 nm.

Solovyov, Vyacheslav F. [Brookhaven National Lab. (BNL), Upton, NY (United States); Wu, Li-jun [Brookhaven National Lab. (BNL), Upton, NY (United States); Rupich, Martin W. [American Superconductor, Devens, MA (United States); Sathyamurthy, Srivatsan [American Superconductor, Devens, MA (United States); Li, Xiaoping [American Superconductor, Devens, MA (United States); Li, Qiang [Brookhaven National Lab. (BNL), Upton, NY (United States)

2014-12-01T23:59:59.000Z

448

Anomalous scalings in differential models of turbulence  

E-Print Network [OSTI]

Differential models for hydrodynamic, passive-scalar and wave turbulence given by nonlinear first- and second-order evolution equations for the energy spectrum in the $k$-space were analysed. Both types of models predict formation an anomalous transient power-law spectra. The second-order models were analysed in terms of self-similar solutions of the second kind, and a phenomenological formula for the anomalous spectrum exponent was constructed using numerics for a broad range of parameters covering all known physical examples. The first-order models were examined analytically, including finding an analytical prediction for the anomalous exponent of the transient spectrum and description of formation of the Kolmogorov-type spectrum as a reflection wave from the dissipative scale back into the inertial range. The latter behaviour was linked to pre-shock/shock singularities similar to the ones arising in the Burgers equation. Existence of the transient anomalous scaling and the reflection-wave scenario are argued to be a robust feature common to the finite-capacity turbulence systems. The anomalous exponent is independent of the initial conditions but varies for for different models of the same physical system.

Simon Thalabard; Sergey Nazarenko; Sebastien Galtier; Medvedev Sergey

2015-02-24T23:59:59.000Z

449

Weak Lensing Predictions at Intermediate Scales  

E-Print Network [OSTI]

As pointed out in previous studies, the measurement of the skewness of the convergence field $\\kappa$ will be useful in breaking the degeneracy among the cosmological parameters constrained from weak lensing observations. The combination of shot noise and finite survey volume implies that such a measurement is likely to be done in a range of intermediate scales ($0.5'$ to 20') where neither perturbation theory nor the hierarchical ansatz apply. Here we explore the behavior of the skewness of $\\kappa$ at these intermediate scales, based on results for the non-linear evolution of the mass bispectrum. We combined different ray-tracing simulations to test our predictions, and we find that our calculations describe accurately the transition from the weakly non-linear to the strongly non-linear regime. We show that the single lens-plane approximation remains accurate even in the non-linear regime, and we explicitly calculate the corrections to this approximation. We also discuss the prospects of measuring the skewn...

Van Waerbeke, L; Scoccimarro, R; Colombi, S; Bernardeau, F

2000-01-01T23:59:59.000Z

450

Emerging universe from scale invariance  

SciTech Connect (OSTI)

We consider a scale invariant model which includes a R{sup 2} term in action and show that a stable ''emerging universe'' scenario is possible. The model belongs to the general class of theories, where an integration measure independent of the metric is introduced. To implement scale invariance (S.I.), a dilaton field is introduced. The integration of the equations of motion associated with the new measure gives rise to the spontaneous symmetry breaking (S.S.B) of S.I. After S.S.B. of S.I. in the model with the R{sup 2} term (and first order formalism applied), it is found that a non trivial potential for the dilaton is generated. The dynamics of the scalar field becomes non linear and these non linearities are instrumental in the stability of some of the emerging universe solutions, which exists for a parameter range of the theory.

Del Campo, Sergio; Herrera, Ramón [Instituto de Física, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2950, Casilla 4059, Valparaíso (Chile); Guendelman, Eduardo I. [Physics Department, Ben Gurion University of the Negev, Beer Sheva 84105 (Israel); Labraña, Pedro, E-mail: sdelcamp@ucv.cl, E-mail: guendel@bgu.ac.il, E-mail: ramon.herrera@ucv.cl, E-mail: plabrana@ubiobio.cl [Departamento de Física, Universidad del Bío Bío, Avenida Collao 1202, Casilla 5-C, Concepción (Chile)

2010-06-01T23:59:59.000Z

451

The scale of cosmic isotropy  

SciTech Connect (OSTI)

The most fundamental premise to the standard model of the universe states that the large-scale properties of the universe are the same in all directions and at all comoving positions. Demonstrating this hypothesis has proven to be a formidable challenge. The cross-over scale R{sub iso} above which the galaxy distribution becomes statistically isotropic is vaguely defined and poorly (if not at all) quantified. Here we report on a formalism that allows us to provide an unambiguous operational definition and an estimate of R{sub iso}. We apply the method to galaxies in the Sloan Digital Sky Survey (SDSS) Data Release 7, finding that R{sub iso} ? 150h{sup ?1}Mpc. Besides providing a consistency test of the Copernican principle, this result is in agreement with predictions based on numerical simulations of the spatial distribution of galaxies in cold dark matter dominated cosmological models.

Marinoni, C.; Bel, J.; Buzzi, A., E-mail: christian.marinoni@cpt.univ-mrs.fr, E-mail: Julien.Bel@cpt.univ-mrs.fr, E-mail: Adeline.Buzzi@cpt.univ-mrs.fr [Centre de Physique Théorique, Aix-Marseille Université, CNRS UMR 7332, case 907, F-13288 Marseille (France)

2012-10-01T23:59:59.000Z

452

Different scaling behaviors of commodity spot and future prices Kaushik Matia,1  

E-Print Network [OSTI]

a some- what abstract character because they i have an almost ``elastic'' response to changes in demand of Physics, Boston University, Boston, Massachusetts 02215 2 BP Upstream, Chertsey Road, Sunbury

Stanley, H. Eugene

453

Comparison of complex effluent treatability in different bench scale microbial electrolysis cells  

E-Print Network [OSTI]

Mark L. Ullery, Bruce E. Logan Department of Civil and Environmental Engineering, 212 Sackett Building limited energy recovery (McCarty et al., 2011). Microbial electrochemical technologies (METs

454

Cognitive Components of Speech at Different Time Scales Ling Feng (lf@imm.dtu.dk)  

E-Print Network [OSTI]

representation. Our hypothesis is now basi- cally ecological: We hypothesize that features that are essen- tially of the ecology, the process of natural selection, and learning. Robust statistical regularities will be exploited producing processes. The optimized representations for low level perception are indeed based on independence

455

Product symbolic status: development of a scale to assess different product types  

E-Print Network [OSTI]

for the degree of DOCTOR OF PHILOSOPHY Approved by: Chair of Committee, Charles D. Samuelson Committee Members, Stephanie C. Payne Larry G. Gresham James H. Leigh Head of Department, William S. Rholes August 2005 Major... International University Chair of Advisory Committee: Dr. Charles Samuelson The literature on status, product symbolism, product involvement, and reference group influence is reviewed to conceptually define the Product Symbolic Status construct...

Wright, James Arthur

2006-10-30T23:59:59.000Z

456

Genetic relationships of American alligator populations distributed across different ecological and geographic scales  

E-Print Network [OSTI]

in Northern Suriname. Journal of Herpetology 22: 283-294. Paetkau D, Calvert W, Stirling I, Strobeck C. 1995. Microsatellite analysis of population structure in Canadian polar bears. Molecular Ecology 4: 347-354. Raymond M, Rousset F. 1995. GENEPOP...

Ryberg, Wade Alan

2012-06-07T23:59:59.000Z

457

A Scaled Difference Chi-square Test Statistic for Moment Structure Analysis  

E-Print Network [OSTI]

with small samples: Test statistics. Multivariate BehavioralKano, Y. (1992). Can test statistics in covariance structurewith applications in statistics and econometrics . New York:

Albert Satorra; Peter Bentler

2011-01-01T23:59:59.000Z

458

Phenomenology Of Sterile Neutrinos At Different Mass Scales: Neutrinoless Double Beta Decay And Neutrino Oscillations.  

E-Print Network [OSTI]

??The existence of neutrino oscillation is the first evidence of physics beyond the Standard Model. It proves that neutrinos are massive and motivates the study… (more)

WONG, CHAN,FAI

2012-01-01T23:59:59.000Z

459

Carbon Sequestration in Dryland and Irrigated Agroecosystems: Quantification at Different Scales for Improved Prediction  

SciTech Connect (OSTI)

The overall objective of this research is to improve our basic understanding of the biophysical processes that govern C sequestration in major rainfed and irrigated agroecosystems in the north-central USA.

Verma, Shashi B; Cassman, Kenneth G; Arkebauer, Timothy J; Hubbard, Kenneth G; Knops, Johannes M; Suyker, Andrew E

2012-09-14T23:59:59.000Z

460

Investigation of scaling and inhibition mechanisms and the influencing factors in static and dynamic inhibition tests  

SciTech Connect (OSTI)

This paper presents results of some recent laboratory study on barium sulfate scale inhibition in oilfield brines and investigation of several factors potentially effecting scale inhibition efficiency. In addition to well known mechanisms of scale nucleation inhibition and crystal growth retardation, dispersion/anti-conglomeration appears to be a significant inhibition mechanism associated with some scale inhibitors, which may play an important role in a dynamic flowing system. The contamination of a brine by an organic chelating agent such as EDTA or citric acid did not, in this study, show any significant effect on the barium sulfate inhibition efficiency of any of the three generically different scale inhibitors included. Experiments show that, in a properly enclosed system, the pH of an oilfield brine even with hydrogen bicarbonate presence can be sufficiently buffered with acetic acid. These new results are believed to be useful in evaluating/selecting scale inhibitors and improving barium sulfate scale inhibition test methods.

Yuan, M.D.; Jamieson, E.; Hammonds, P. [Baker Petrolite, Aberdeen (United Kingdom)

1998-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "vertical scales differ" 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

Transition physics and scaling overview  

SciTech Connect (OSTI)

This paper presents an overview of recent experimental progress towards understanding H-mode transition physics and scaling. Terminology and techniques for studying H-mode are reviewed and discussed. The model of shear E x B flow stabilization of edge fluctuations at the L-H transition is gaining wide acceptance and is further supported by observations of edge rotation on a number of new devices. Observations of poloidal asymmetries of edge fluctuations and dephasing of density and potential fluctuations after the transition pose interesting challenges for understanding H-mode physics. Dedicated scans to determine the scaling of the power threshold have now been performed on many machines. A dear B{sub t} dependence is universally observed but dependence on the line averaged density is complicated. Other dependencies are also reported. Studies of the effect of neutrals and error fields on the power threshold are under investigation. The ITER threshold database has matured and offers guidance to the power threshold scaling issues relevant to next-step devices.

Carlstrom, T.N.

1995-12-01T23:59:59.000Z

462

Scaling of the magnetic reconnection rate with symmetric shear flow  

SciTech Connect (OSTI)

The scaling of the reconnection rate during (fast) Hall magnetic reconnection in the presence of an oppositely directed bulk shear flow parallel to the reconnecting magnetic field is studied using two-dimensional numerical simulations of Hall reconnection with two different codes. Previous studies noted that the reconnection rate falls with increasing flow speed and shuts off entirely for super-Alfvenic flow, but no quantitative expression for the reconnection rate in sub-Alfvenic shear flows is known. An expression for the scaling of the reconnection rate is presented.

Cassak, P. A. [Department of Physics, West Virginia University, Morgantown, West Virginia 26506 (United States); Otto, A. [Geophysical Institute, University of Alaska-Fairbanks, Fairbanks, Alaska 99775 (United States)

2011-07-15T23:59:59.000Z

463

A Conceptual Approach to Two-Scale Constitutive Modelling For Hydro-Mechanical Coupling  

E-Print Network [OSTI]

Large scale modelling of fluid flow coupled with solid failure in geothermal reservoirs or hydrocarbon extraction from reservoir rocks usually involves behaviours at two scales: lower scale of the inelastic localization zone, and larger scale of the bulk continuum where elastic behaviour can be reasonably assumed. The hydraulic conductivities corresponding to the mechanical properties at these two scales are different. In the bulk elastic host rock, the hydraulic conductivity does not vary much with the deformation, while it significantly changes in the lower scale of the localization zone due to inelastic deformation. Increase of permeability due to fracture and/or dilation, or reduction of permeability due to material compaction can take place inside this zone. The challenge is to predict the evolution of hydraulic conductivities coupled with the mechanical behaviour of the material in all stages of the deformation process. In the early stage of diffuse deformation, the permeability of the material can be reasonably assumed to be homogenous over the whole Representative Volume Element (RVE) However, localized failure results in distinctly different conductivities in different parts of the RVE. This paper establishes a general framework and corresponding field equations to describe the hydro-mechanical coupling in both diffuse and localized stages of deformation in rocks. In particular, embedding the lower scale hydro-mechanical behaviour of the localization zone inside an elastic bulk, together with their corresponding effective sizes, helps effectively deal with scaling issues in large-scale modelling. Preliminary results are presented which demonstrate the promising features of this new approach.

Giang D. Nguyen; Abbas El-Zein; Terry Bennett

2014-06-05T23:59:59.000Z

464

Determinant representation of correlation functions for the U{sub q}(gl(1 vertical bar 1)) free Fermion model  

SciTech Connect (OSTI)

With the help of the factorizing F-matrix, the scalar products of the U{sub q}(gl(1 vertical bar 1)) free fermion model are represented by determinants. By means of these results, we obtain the determinant representations of correlation functions of the model.

Zhao Shaoyou; Yang Wenli; Zhang Yaozhong [Department of Mathematics, University of Queensland, Brisbane, QLD 4072 (Australia); Department of Physics, Beijing Institute of Technology, Beijing 100081 (China); Department of Mathematics, University of Queensland, Brisbane, QLD 4072 (Australia); Institute of Modern Physics, Northwest University, Xian 710069 (China); Department of Mathematics, University of Queensland, Brisbane, QLD 4072 (Australia)

2006-01-15T23:59:59.000Z

465

1856 IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 57, NO. 8, AUGUST 2010 Harvesting and Transferring Vertical Pillar Arrays of  

E-Print Network [OSTI]

1856 IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 57, NO. 8, AUGUST 2010 Harvesting and Transferring Vertical Pillar Arrays of Single-Crystal Semiconductor Devices to Arbitrary Substrates Logeeswaran VJ, Aaron M. Katzenmeyer, and M. Saif Islam Abstract--Development of devices that can be fabricated

Islam, M. Saif

466

Inflight Vertical Antenna Patterns for SIR-C from Amazon Rain-Forest Observations Yujun Fang and Richard K. Moore  

E-Print Network [OSTI]

-We measured the vertical pattern of the Shuttle Imaging Radar C (SIR-C) antenna using images of the Amazon and Richard K. Moore University of Kansas, Radar Systems and Remote Sensing Laboratory 2291 Irving Hill Road. We define an outlier as a signal level outside a region bounded by the 1% levels on the main peak

Kansas, University of

467

Vertices of Lie Modules Roger M. Bryant, Susanne Danz, Karin Erdmann, and J#rgen M#ller  

E-Print Network [OSTI]

Vertices of Lie Modules Roger M. Bryant, Susanne Danz(LieprF(n))= dim(LieF(n)) has re* *cently been studied by Erdmann~Tan [14], and by Bryant~Lim~Tan [5]. By [5, Thm LiepfF(n) of LieF(n) always belongs to the principal block of F Sn, and Bryant~* *Erdmann [4] have

Mueller, Jürgen

468

Optics, Acoustics and Stress in Situ (OASIS): Effects of Aggregation, Vertical Structure, and Relation to Physical Forcing.  

E-Print Network [OSTI]

Optics, Acoustics and Stress in Situ (OASIS): Effects of Aggregation, Vertical Structure. Arlington, VA 22203-1995 TITLE: Optics, Acoustics and Stress in Situ (OASIS): Effects of Aggregation of Research and Sponsored Programs #12;Abstract Nearbed optical and acoustical properties in coastal waters

Boss, Emmanuel S.

469

Prediction of Vertical Motions for Landing Operations of UAVs Xilin Yang, Hemanshu Pota, Matt Garratt and Valery Ugrinovskii  

E-Print Network [OSTI]

Prediction of Vertical Motions for Landing Operations of UAVs Xilin Yang, Hemanshu Pota, Matt Garratt and Valery Ugrinovskii Abstract-- This paper outlines a novel and feasible procedure to predict demonstrate that the proposed prediction approach substantially reduces the model complexity and exhibits

Pota, Himanshu Roy

470

Offset voltage of Schottky-collector silicon-on-glass vertical PNP's G. Lorito, L. K. Nanver and N. Nenadovi  

E-Print Network [OSTI]

Offset voltage of Schottky-collector silicon-on-glass vertical PNP's G. Lorito, L. K. Nanver and N and investigated with respect to the influence of the collector design on the offset voltage. With Schottky collector contacts the offset voltage can be made both very low (

Technische Universiteit Delft

471

Modeling the coupling between free and forced convection in a vertical permeable slot: implications for the heat  

E-Print Network [OSTI]

1 Modeling the coupling between free and forced convection in a vertical permeable slot numerical study of the coupling between forced and free convective flows has been performed by considering: implications for the heat production of an Enhanced Geothermal System Arnaud Batailléa , Pierre Genthona

Paris-Sud XI, Université de

472

Vertical minority carrier electron transport in p-type InAs/GaSb type-II superlattices  

E-Print Network [OSTI]

Vertical minority carrier electron transport in p-type InAs/GaSb type-II superlattices G. A. Umana transport J. Appl. Phys. 112, 123715 (2012) Characteristics of built-in polarization potentials Appl. Phys. Lett. 101, 243113 (2012) Thermal stability of the deep ultraviolet emission from Al

Krishna, Sanjay

473

Mean vertical wind in the mesosphere-lower thermosphere region (80120 km) deduced from the WINDII observations  

E-Print Network [OSTI]

thermosphere. It is a remote-sensing instrument providing the hori- zontal wind components. In this study at the equator and tropics. Zonal Coriolis acceleration and adiabatic heating and cooling rate associated subsidence heating and adiabatic cool- ing. Thus the knowledge of meridional and vertical winds provides

Paris-Sud XI, Université de

474

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

E-Print Network [OSTI]

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

475

Potential order-of-magnitude enhancement of wind farm power density via counter-rotating vertical-axis wind  

E-Print Network [OSTI]

Potential order-of-magnitude enhancement of wind farm power density via counter-rotating vertical an alternative approach to wind farming that has the potential to concurrently reduce the cost, size-axis wind turbine arrays John O. Dabiria) Graduate Aeronautical Laboratories and Bioengineering, California

Dabiri, John O.

476

Thermal decomposition of ethanol and growth of vertically aligned single-walled carbon nanotubes by alcohol catalytic chemical vapor deposition  

E-Print Network [OSTI]

Thermal decomposition of ethanol and growth of vertically aligned single-walled carbon nanotubes. In this study, we have investigated the thermal decomposition of ethanol at various temperatures, as well National Meeting, San Francisco, CA, September 10-14, 2006 1/1 PRES 29 - Thermal decomposition of ethanol

Maruyama, Shigeo

477

Final Report: Property Improvement in CZT via Modeling and Processing Innovations – Te-particles in vertical gradient freeze CZT: Size and Spatial Distributions and Constitutional Supercooling  

SciTech Connect (OSTI)

A section of a vertical gradient freeze CZT boule approximately 2100-mm3 with a planar area of 300-mm2 was prepared and examined using transmitted IR microscopy at various magnifications to determine the three-dimensional spatial and size distributions of Te-particles over large longitudinal and radial length scales. The boule section was approximately 50-mm wide by 60-mm in length by 7-mm thick and was doubly polished for TIR work. Te-particles were imaged through the thickness using extended focal imaging to locate the particles in thickness planes spaced 15-µm apart and then in plane of the image using xy-coordinates of the particle center of mass so that a true three dimensional particle map was assembled for a 1-mm by 45-mm longitudinal strip and for a 1-mm by 50-mm radial strip. Te-particle density distributions were determined as a function of longitudinal and radial positions in these strips, and treating the particles as vertices of a network created a 3D image of the particle spatial distribution. Te-particles exhibited a multi-modal log-normal size density distribution that indicated a slight preference for increasing size with longitudinal growth time, while showing a pronounced cellular network structure throughout the boule that can be correlated to dislocation network sizes in CZT. Higher magnification images revealed a typical Rayleigh-instability pearl string morphology with large and small satellite droplets. This study includes solidification experiments in small crucibles of 30:70 mixtures of Cd:Te to reduce the melting point below 1273 K (1000?C). These solidification experiments were performed over a wide range of cooling rates and clearly demonstrated a growth instability with Te-particle capture that is suggested to be responsible for one of the peaks in the size distribution using size discrimination visualization. The results are discussed with regard to a manifold Te-particle genesis history as 1) Te-particle direct capture from melt-solid growth instabilities, 2) Te-particle formation from dislocation core diffusion and the formation and breakup of Te-tubes, and 3) Te-particle formation due to classical nucleation and growth as precipitates.

Henager, Charles H.; Alvine, Kyle J.; Bliss, Mary; Riley, Brian J.; Stave, Jean A.

2014-10-01T23:59:59.000Z

478

Scaling law in liquid drop coalescence driven by surface tension Mingming Wua)  

E-Print Network [OSTI]

Scaling law in liquid drop coalescence driven by surface tension Mingming Wua) Department experimental results on the coalescence of two liquid drops driven by surface tension. Using a high speed that such scaling law is robust when using fluids of different viscosities and surface tensions. The prefactor

Cubaud, Thomas

479

Localized Scale Coupling and New Educational Paradigms in Multiscale Mathematics and Science  

SciTech Connect (OSTI)

We have experimentally demonstrated how microscale phenomena affect suspended particle behavior on the mesoscale, and how particle group behavior on the mesoscale influences the macroscale suspension behavior. Semi-analytical and numerical methods to treat flows on different scales have been developed, and a framework to combine these scale-dependent treatment has been described.

Ingber, Marc; Vorobieff, Peter

2014-03-14T23:59:59.000Z

480

Diagenesis in seagrass vegetated sediments: biogeochemical processes on diurnal time scales  

E-Print Network [OSTI]

intervals (?x) of ?H2S and Fe2+. Characteristic scale lengths obtained for sediments from seagrass environments are not significantly different from those observed for unvegetated sediments and averaged 13.7?? 2.2 mm. Lateral variations in our scales...

Hebert, Andrew Brian

2005-11-01T23:59:59.000Z

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


481

The Economic Productivity of Urban Areas: Disentangling General Scale Effects from Local Exceptionality  

E-Print Network [OSTI]

#12;The Economic Productivity of Urban Areas: Disentangling General Scale Effects from Local The factors that explain differences in the economic productivity of urban areas have remained difficult of economic activity in a city in terms of a production function, together with a scaling perspective

482

Preliminary Scaling Estimate for Select Small Scale Mixing Demonstration Tests  

SciTech Connect (OSTI)

The Hanford Site double-shell tank (DST) system provides the staging location for waste that will be transferred to the Hanford Tank Waste Treatment and Immobilization Plant (WTP). Specific WTP acceptance criteria for waste feed delivery describe the physical and chemical characteristics of the waste that must be met before the waste is transferred from the DSTs to the WTP. One of the more challenging requirements relates to the sampling and characterization of the undissolved solids (UDS) in a waste feed DST because the waste contains solid particles that settle and their concentration and relative proportion can change during the transfer of the waste in individual batches. A key uncertainty in the waste feed delivery system is the potential variation in UDS transferred in individual batches in comparison to an initial sample used for evaluating the acceptance criteria. To address this uncertainty, a number of small-scale mixing tests have been conducted as part of Washington River Protection Solutions’ Small Scale Mixing Demonstration (SSMD) project to determine the performance of the DST mixing and sampling systems.

Wells, Beric E.; Fort, James A.; Gauglitz, Phillip A.; Rector, David R.; Schonewill, Philip P.

2013-09-12T23:59:59.000Z

483

Vertically Loaded Anchor: Drag Coefficient, Fall Velocity, and Penetration Depth using Laboratory Measurements  

E-Print Network [OSTI]

anchor point. Values such as drag coefficient and terminal velocity are vital in predicting embedment depth to obtain the mooring capacity required by the floating facility. Two scaled models of the Mark I OMNI-Max anchor were subjected to a series...

Cenac, William

2011-08-08T23:59:59.000Z

484

Scale and deposits in high-heat-rejection engines  

SciTech Connect (OSTI)

Scaling under conditions very similar to those of a heavy-duty diesel engine cooling system was investigated using a newly designed, versatile test stand. The parameters included flow rate, heat flux, hardness, along with bulk fluid temperatures. The hot surface temperature, a critical parameter, was also measured. Results were interpreted in terms of the conditions in the boundary layer at the hot surface. Critical values of flow rate and heat flux existed for scaling under experimental conditions. A quantitative relationship of scale with heat flux and hardness was observed. Deposits produced from testing of different types of commercial coolants, including phosphate based and nonphosphate bases, were measured and compared with results from simple beaker tests.

Chen, Y.S.; Kershisnik, E.I. [Dober Group, Glenwood, IL (United States); Hudgens, R.D. [Fleetguard, Inc., Cookeville, TN (United States); Corbeels, C.L.; Zehr, R.L. [Cummins Engine Co., Inc., Columbus, IN (United States)

1999-08-01T23:59:59.000Z

485

Holographic Superconductors with Lifshitz Scaling  

E-Print Network [OSTI]

Black holes in asymptotically Lifshitz spacetime provide a window onto finite temperature effects in strongly coupled Lifshitz models. We add a Maxwell gauge field and charged matter to a recently proposed gravity dual of 2+1 dimensional Lifshitz theory. This gives rise to charged black holes with scalar hair, which correspond to the superconducting phase of holographic superconductors with z > 1 Lifshitz scaling. Along the way we analyze the global geometry of static, asymptotically Lifshitz black holes at arbitrary critical exponent z > 1. In all known exact solutions there is a null curvature singularity in the black hole region, and, by a general argument, the same applies to generic Lifshitz black holes.

E. J. Brynjolfsson; U. H. Danielsson; L. Thorlacius; T. Zingg

2010-03-27T23:59:59.000Z

486

Scale Models & Wind Turbines  

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

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: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l LPROJECTS IN7 RoadmapProgram| Department ofat ThisasScale Models and

487

Scale-Dependent Rates of Uranyl Surface Complexation Reaction in Sediments  

SciTech Connect (OSTI)

Scale-dependency of uranyl[U(VI)] surface complexation rates was investigated in stirred flow-cell and column systems using a U(VI)-contaminated sediment from the US Department of Energy, Hanford site, WA. The experimental results were used to estimate the apparent rate of U(VI) surface complexation at the grain-scale and in porous media. Numerical simulations using molecular, pore-scale, and continuum models were performed to provide insights into and to estimate the rate constants of U(VI) surface complexation at the different scales. The results showed that the grain-scale rate constant of U(VI) surface complexation was over 3 to 10 orders of magnitude smaller, dependent on the temporal scale, than the rate constant calculated using the molecular simulations. The grain-scale rate was faster initially and slower with time, showing the temporal scale-dependency. The largest rate constant at the grain-scale decreased additional 2 orders of magnitude when the rate was scaled to the porous media in the column. The scaling effect from the grain-scale to the porous media became less important for the slower sorption sites. Pore-scale simulations revealed the importance of coupled mass transport and reactions in both intragranular and inter-granular domains, which caused both spatial and temporal dependence of U(VI) surface complexation rates in the sediment. Pore-scale simulations also revealed a new rate-limiting mechanism in the intragranular porous domains that the rate of coupled diffusion and surface complexation reaction was slower than either process alone. The results provided important implications for developing models to scale geochemical/biogeochemical reactions.

Liu, Chongxuan; Shang, Jianying; Kerisit, Sebastien N.; Zachara, John M.; Zhu, Weihuang

2013-03-15T23:59:59.000Z

488

Synthesis and electrochemical capacitance of long tungsten oxide nanorod arrays grown vertically on substrate  

SciTech Connect (OSTI)

Highlights: ? Growth of long amorphous tungsten oxide nanorods on a substrate. ? Formation of single-crystalline tungsten oxide nanorods by a heat-treatment. ? High electrochemical pseudocapacitance of 2.8 mF cm{sup ?2}. ? Excellent cyclability of psuedocapacitance up to 1000 cycles. -- Abstract: Long tungsten oxide nanorods are vertically grown on Al/W/Ti coated silicon substrates using a two-step anodization process. The first anodization of the Al film forms a mesh-like mask of anodic aluminum oxide, and the second anodization of the W film results in the formation of a buffer layer, a bottom nanorod, and a top nanorod of amorphous tungsten oxide. A pore-widening process prior to the second anodization leads to the enhancement of nanorod length above approximately 500 nm. After a heat-treatment, the tungsten oxide nanorods are crystallized to form a single crystalline structure while the buffer layer forms a polycrystalline structure. The crystalline tungsten oxide nanorods show a cyclic voltammogram retaining the quasi-rectangular shape of an electrochemically reversible faradaic redox reaction, i.e., a typical pseudocapacitive behavior. The maximum electrochemical capacitance per apparent surface area reaches approximately 2.8 mF cm{sup ?2} at the voltage scan rate of 20 mV s{sup ?1}, and the excellent cyclability of charge–discharge process is maintained up to 1000 cycles.

Park, Sun Hwa [Department of Nanomaterials Science and Engineering, University of Science and Technology, Daejeon 305-350 (Korea, Republic of)] [Department of Nanomaterials Science and Engineering, University of Science and Technology, Daejeon 305-350 (Korea, Republic of); Kim, Young Heon; Lee, Tae Geol; Shon, Hyun Kyong [Korea Research Institute of Standards and Science, Daejeon 305-340 (Korea, Republic of)] [Korea Research Institute of Standards and Science, Daejeon 305-340 (Korea, Republic of); Park, Hyun Min [Department of Nanomaterials Science and Engineering, University of Science and Technology, Daejeon 305-350 (Korea, Republic of) [Department of Nanomaterials Science and Engineering, University of Science and Technology, Daejeon 305-350 (Korea, Republic of); Korea Research Institute of Standards and Science, Daejeon 305-340 (Korea, Republic of); Song, Jae Yong, E-mail: jysong@kriss.re.kr [Korea Research Institute of Standards and Science, Daejeon 305-340 (Korea, Republic of); Department of Nano Science, University of Science and Technology, Daejeon 305-350 (Korea, Republic of)

2012-11-15T23:59:59.000Z

489

Water Velocity Measurements on a Vertical Barrier Screen at the Bonneville Dam Second Powerhouse  

SciTech Connect (OSTI)

Fish screens at hydroelectric dams help to protect rearing and migrating fish by preventing them from passing through the turbines and directing them towards the bypass channels by providing a sweeping flow parallel to the screen. However, fish screens may actually be harmful to fish if they become impinged on the surface of the screen or become disoriented due to poor flow conditions near the screen. Recent modifications to the vertical barrier screens (VBS) at the Bonneville Dam second powerhouse (B2) intended to increase the guidance of juvenile salmonids into the juvenile bypass system (JBS) have resulted in high mortality and descaling rates of hatchery subyearling Chinook salmon during the 2008 juvenile salmonid passage season. To investigate the potential cause of the high mortality and descaling rates, an in situ water velocity measurement study was conducted using acoustic Doppler velocimeters (ADV) in the gatewell slot at Units 12A and 14A of B2. From the measurements collected the average approach velocity, sweep velocity, and the root mean square (RMS) value of the velocity fluctuations were calculated. The approach velocities measured across the face of the VBS varied but were mostly less than 0.3 m/s. The sweep velocities also showed large variances across the face of the VBS with most measurements being less than 1.5 m/s. This study revealed that the approach velocities exceeded criteria recommended by NOAA Fisheries and Washington State Department of Fish and Wildlife intended to improve fish passage conditions.

Hughes, James S.; Deng, Zhiqun; Weiland, Mark A.; Martinez, Jayson J.; Yuan, Yong

2011-11-22T23:59:59.000Z

490

Hot-film anemometer measurements in adiabatic two-phase flow through a vertical duct  

SciTech Connect (OSTI)

A hot-film anemometer (HFA) probe was used to obtain local measurements of void fraction and bubble frequency in a vertically oriented, high aspect ratio duct containing R-134a under selected adiabatic two-phase flow conditions. Data were obtained along a narrow dimension scan over the range 0.03 {le} {bar Z} {le} 0.80, where {bar Z} is the distance from the wall normalized with the duct spacing dimension. The void fraction profiles displayed large gradients in the near-wall regions and broad maxima near the duct centerline. The trends in the bubble frequency data generally follow those for the local void fraction data. However, the relatively large number of bubbles at higher pressure implies a larger magnitude of the interfacial area concentration, for the same cross-sectional average void fraction. For the two annular flow conditions tested, analysis of the HFA output voltage signal enabled identification of three distinct regions of the flow field; liquid film with dispersed bubbles, interfacial waves, and continuous vapor with dispersed droplets.

Trabold, T.A.; Moore, W.E.; Morris, W.O. [Lockheed Martin Corp., Schenectady, NY (United States)

1997-06-01T23:59:59.000Z

491

Technology assessment of vertical and horizontal air drilling potential in the United States. Final report  

SciTech Connect (OSTI)

The objective of the research was to assess the potential for vertical, directional and horizontal air drilling in the United States and to evaluate the current technology used in air drilling. To accomplish the task, the continental United States was divided into drilling regions and provinces. The map in Appendix A shows the divisions. Air drilling data were accumulated for as many provinces as possible. The data were used to define the potential problems associated with air drilling, to determine the limitations of air drilling and to analyze the relative economics of drilling with air versus drilling mud. While gathering the drilling data, operators, drilling contractors, air drilling contractors, and service companies were contacted. Their opinion as to the advantages and limitations of air drilling were discussed. Each was specifically asked if they thought air drilling could be expanded within the continental United States and where that expansion could take place. The well data were collected and placed in a data base. Over 165 records were collected. Once in the data base, the information was analyzed to determine the economics of air drilling and to determine the limiting factors associated with air drilling.

Carden, R.S.

1993-08-18T23:59:59.000Z

492

VISTA (Vertical Integration of Science, Technology, and Applications) user interface software study  

SciTech Connect (OSTI)

The Vertical Integration of Science, Technology, and Applications (VISTA) project is an initiative to employ modern information and communications technology for rapid and effective application of basic research results by end users. Developed by the Pacific Northwest Laboratory, VISTA's purpose is to develop and deploy information systems (software or software/hardware products) to broad segments of various markets. Inherent in these products would be mechanisms for accessing PNL-resident information about the problem. A goal of VISTA is to incorporate existing, commercially available user interface technology into the VISTA UIMS. Commercial systems are generally more complete, reliable, and cost-effective than software developed in-house. The objective of this report is to examine the current state of commercial user interface software and discuss the implications of selections thereof. This report begins by describing the functionality of the user interface as it applies to users and application developers. Next, a reference model is presented defining the various operational software layers of a graphical user interface. The main body follows which examines current user interface technology by sampling a number of commercial systems. Both the window system and user interface toolkit markets are surveyed. A summary of the current technology concludes this report. 15 refs., 3 figs., 1 tab.

Chin, G.

1990-04-01T23:59:59.000Z

493

Design Parameters and Commissioning of Vertical Inserts Used for Testing the XFEL Superconducting Cavities  

E-Print Network [OSTI]

The European XFEL is a new research facility currently under construction at DESY in the Hamburg area in Germany. From 2015 on, it will generate extremely intense X-ray flashes that will be used by researchers from all over the world. The superconducting XFEL linear accelerator consists of 100 accelerator modules with more than 800 RF-cavities inside. The accelerator modules, superconducting magnets and cavities will be tested in the accelerator module test facility (AMTF). This paper gives an overview of the design parameters and the commissioning of the vertical insert, used in two cryostats (XATC) of the AMTF-hall. The Insert serves as a holder for 4 nine-cell cavities. This gives the possibility to cool down 4 cavities to 2K in parallel and, consequently, to reduce the testing time. The following RF measurement, selected as quality check, will be done separately for each cavity. Afterwards the cavities will be warmed up again and will be sent to the accelerator module assembly.

J. Schaffran; Y. Bozhko; B. Petersen; D. Meissner; M. Chorowski; J. Polinski

2013-06-26T23:59:59.000Z

494

Design parameters and commissioning of vertical inserts used for testing the XFEL superconducting cavities  

SciTech Connect (OSTI)

The European XFEL is a new research facility currently under construction at DESY in the Hamburg area in Germany. From 2015 on, it will generate extremely intense X-ray flashes that will be used by researchers from all over the world. The superconducting XFEL linear accelerator consists of 100 accelerator modules with more than 800 RF-cavities inside. The accelerator modules, superconducting magnets and cavities will be tested in the accelerator module test facility (AMTF). This paper gives an overview of the design parameters and the commissioning of the vertical insert, used in two cryostats (XATC) of the AMTF-hall. The Insert serves as a holder for 4 nine-cell cavities. This gives the possibility to cool down 4 cavities to 2K in parallel and, consequently, to reduce the testing time. The following RF measurement, selected as quality check, will be done separately for each cavity. Afterwards the cavities will be warmed up again and will be sent to the accelerator module assembly.

Schaffran, J.; Bozhko, Y.; Petersen, B.; Meissner, D. [Deutsches Elektronen Synchrotron DESY, Notkestr. 85, D-22607 Hamburg (Germany); Chorowski, M.; Polinski, J. [Wroclaw University of Technology, Wyb. Wyspianskiego 27, 50-370 Wroclaw (Poland)

2014-01-29T23:59:59.000Z

495

Test plan for radioactive testing of a vertical direct denitration calciner  

SciTech Connect (OSTI)

The prototype Vertical Denitration Calciner (VDC) is installed in glovebox 188 in the Plutonium Process Support Laboratory (PPSL). Safety analysis contained in WHC-SD-CP-SAR-021 (FSAR) Rev. 0-L and Addendum to WHC-SD-CP-SAR-021, ''Laboratory Prototype Calciner'' establishes the prototype VDC needs to be shut down if a seismic event of greater than 0.07 g occurs. Shut down is to be automatic upon detection of the seismic event. This requires tie-in of various valves and power for the prototype VDC into the existing Seismic Shutdown System for the Ventilation Supply Fans described in FSAR 5.4.1.2.4. The proposed changes covered by this USQ evaluation include: (1) the physical tie-in modifications, including drawings and Engineering Change Notice (ECN), (2) the work package for accomplishing the modifications, (3) the changes to the System Description Documents, (4) the changes to the Safety Equipment List necessitated by the modifications, and (5) the changes to the failure modes and effects analysis. WHC-SDCP-OSR-010, Plutonium Finishing Plant Operational Safety Requirements Limiting Condition for Operation (LCO) 3.2.3 has been revised to include the requirement for the existing seismic shutdown system to also shut down the laboratory calciner in the event of detection of a greater than 0.07 g seismic event.

COMPTON, J.A.

1999-08-31T23:59:59.000Z

496

Test Plan for Radioactive Testing of a Vertical Direct Denitration Calciner  

SciTech Connect (OSTI)

The prototype Vertical Denitration Calciner (VDC) is installed in glovebox 188 in the Plutonium Process Support Laboratory (PPSL). Safety analysis contained in WHC-SD-CP-SAR-021 (FSAR) Rev. 0-L and Addendum to WHC-SD-CP-SAR-021, ''Laboratory Prototype Calciner'' establishes the prototype VDC needs to be shut down if a seismic event of greater than 0.07 g occurs. Shut down is to be automatic upon detection of the seismic event. This requires tie-in of various valves and power for the prototype VDC into the existing Seismic Shutdown System for the Ventilation Supply Fans described in FSAR 5.4.1.2.4. The proposed changes covered by this USQ evaluation include: (1) the physical tie-in modifications, including drawings and Engineering Change Notice (ECN), (2) the work package for accomplishing the modifications, (3) the changes to the System Description Documents, (4) the changes to the Safety Equipment List necessitated by the modifications, and (5) the changes to the failure modes and effects analysis. WHC-SDCP-OSR-010, Plutonium Finishing Plant Operational Safety Requirements Limiting Condition for Operation (LCO) 3.2.3 has been revised to include the requirement for the existing seismic shutdown system to also shut down the laboratory calciner in the event of detection of a greater than 0.07 g seismic event.

COMPTON, J.A.

1999-08-13T23:59:59.000Z

497

Test Plan for Radioactive Testing of a Vertical Direct Denitration Calciner  

SciTech Connect (OSTI)

The prototype Vertical Denitration Calciner (VDC) is installed in glovebox 188 in the Plutonium Process Support Laboratory (PPSL). Safety analysis contained in WHC-SD-CP-SAR-021 (FSAR) Rev. 0-L and Addendum to WHC-SD-CP-SAR-021, ''Laboratory Prototype Calciner'' establishes the prototype VDC needs to be shut down if a seismic event of greater than 0.07 g occurs. Shut down is to be automatic upon detection of the seismic event. This requires tie-in of various valves and power for the prototype VDC into the existing Seismic Shutdown System for the Ventilation Supply Fans described in FSAR 5.4.1.2.4. The proposed changes covered by this USQ evaluation include: (1) the physical tie-in modifications, including drawings and Engineering Change Notice (ECN), (2) the work package for accomplishing the modifications, (3) the changes to the System Description Documents, (4) the changes to the Safety Equipment List necessitated by the modifications, and (5) the changes to the failure modes and effects analysis. WHC-SDCP-OSR-010, Plutonium Finishing Plant Operational Safety Requirements Limiting Condition for Operation (LCO) 3.2.3 has been revised to include the requirement for the existing seismic shutdown system to also shut down the laboratory calciner in the event of detection of a greater than 0.07 g seismic event.

COMPTON, J.A.

1999-08-31T23:59:59.000Z

498

Development of substrate-removal-free vertical ultraviolet light-emitting diode (RefV-LED)  

SciTech Connect (OSTI)

A vertical ultraviolet (UV) light-emitting diode (LED) that does not require substrate removal is developed. Spontaneous via holes are formed in n-AlN layer epitaxially grown on a high conductive n+Si substrate and the injected current flows directly from the p-electrode to high doped n{sup +} Si substrate through p-AlGaN, multi-quantum wells, n-AlGaN and spontaneous via holes in n-AlN. The spontaneous via holes were formed by controlling feeding-sequence of metal-organic gas sources and NH{sub 3} and growth temperature in MOCVD. The via holes make insulating n-AlN to be conductive. We measured the current-voltage, current-light intensity and emission characteristics of this device. It exhibited a built-in voltage of 3.8 V and emission was stated at 350 nm from quantum wells with successive emission centered at 400?nm. This UV LED can be produced, including formation of n and p electrodes, without any resist process.

Kurose, N., E-mail: kurose@fc.ritsumei.ac.jp; Aoyagi, Y. [The Research Organization of Science and Technology, Ritsumeikan University, 1-1-1, Noji-higashi, Kusatsu, Shiga 525-8577 (Japan)] [The Research Organization of Science and Technology, Ritsumeikan University, 1-1-1, Noji-higashi, Kusatsu, Shiga 525-8577 (Japan); Shibano, K.; Araki, T. [Department of Science and Technology, Ritsumeikan University, 1-1-1, Noji-higashi, Kusatsu, Shiga 525-8577 (Japan)] [Department of Science and Technology, Ritsumeikan University, 1-1-1, Noji-higashi, Kusatsu, Shiga 525-8577 (Japan)

2014-02-15T23:59:59.000Z

499

VERTICAL MIGRATION OF RADIONUCLIDES IN THE VICINITY OF THE CHERNOBYL CONFINEMENT SHELTER  

SciTech Connect (OSTI)

Studies on vertical migration of Chernobyl-origin radionuclides in the 5-km zone of the Chernobyl Nuclear Power Plant (ChNPP) in the area of the Red Forest experimental site were completed. Measurements were made by gamma spectrometric methods using high purity germanium (HPGe) detectors with beryllium windows. Alpha-emitting isotopes of plutonium were determined by the measurement of the x-rays from their uranium progeny. The presence of {sup 60}Co, {sup 134,137}Cs, {sup 154,155}Eu, and {sup 241}Am in all soil layers down to a depth of 30 cm was observed. The presence of {sup 137}Cs and {sup 241}Am were noted in the area containing automorphous soils to a depth of 60 cm. In addition, the upper soil layers at the test site were found to contain {sup 243}Am and {sup 243}Cm. Over the past ten years, the {sup 241}Am/{sup 137}Cs ratio in soil at the experimental site has increased by a factor of 3.4, nearly twice as much as would be predicted based solely on radioactive decay. This may be due to 'fresh' fallout emanating from the ChNPP Confinement Shelter.

Farfan, E.; Jannik, T.; Marra, J.

2011-10-01T23:59:59.000Z

500

VERTIGO (VERtical Transport In the Global Ocean): A study of particle sources and flux attenuation in the North Pacific  

SciTech Connect (OSTI)

The VERtical Transport In the Global Ocean (VERTIGO) study examined particle sources and fluxes through the ocean's 'twilight zone' (defined here as depths below the euphotic zone to 1000 m). Interdisciplinary process studies were conducted at contrasting sites off Hawaii (ALOHA) and in the NW Pacific (K2) during 3 week occupations in 2004 and 2005, respectively. We examine in this overview paper the contrasting physical, chemical and biological settings and how these conditions impact the source characteristics of the sinking material and the transport efficiency through the twilight zone. A major finding in VERTIGO is the considerably lower transfer efficiency (T{sub eff}) of particulate organic carbon (POC), POC flux 500/150 m, at ALOHA (20%) vs. K2 (50%). This efficiency is higher in the diatom-dominated setting at K2 where silica-rich particles dominate the flux at the end of a diatom bloom, and where zooplankton and their pellets are larger. At K2, the drawdown of macronutrients is used to assess export and suggests that shallow remineralization above our 150 m trap is significant, especially for N relative to Si. We explore here also surface export ratios (POC flux/primary production) and possible reasons why this ratio is higher at K2, especially during the first trap deployment. When we compare the 500 m fluxes to deep moored traps, both sites lose about half of the sinking POC by >4000 m, but this comparison is limited in that fluxes at depth may have both a local and distant component. Certainly, the greatest difference in particle flux attenuation is in the mesopelagic, and we highlight other VERTIGO papers that provide a more detailed examination of the particle sources, flux and processes that attenuate the flux of sinking particles. Ultimately, we contend that at least three types of processes need to be considered: heterotrophic degradation of sinking particles, zooplankton migration and surface feeding, and lateral sources of suspended and sinking materials. We have evidence that all of these processes impacted the net attenuation of particle flux vs. depth measured in VERTIGO and would therefore need to be considered and quantified in order to understand the magnitude and efficiency of the ocean's biological pump.

Buesseler, K.O.; Trull, T.W.; Steinberg, D.K.; Silver, M.W.; Siegel, D.A.; Saitoh, S.-I.; Lamborg, C.H.; Lam, P.J.; Karl, D.M.; Jiao, N.Z.; Honda, M.C.; Elskens, M.; Dehairs, F.; Brown, S.L.; Boyd, P.W.; Bishop, J.K.B.; Bidigare, R.R.

2008-06-10T23:59:59.000Z