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Note: This page contains sample records for the topic "oscillating water column" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

High speed electrical power takeoff for oscillating water columns   

E-Print Network [OSTI]

This thesis describes research into electrical power takeoff mechanisms for Oscillating Water Column (OWC) wave energy devices. The OWC application is studied and possible alternatives to the existing Induction Generator ...

Hodgins, Neil

2010-01-01T23:59:59.000Z

2

Wave Energy Extraction from an Oscillating Water Column in a Truncated Circular Cylinder  

E-Print Network [OSTI]

Oscillating Water Column (OWC) device is a relatively practical and convenient way that converts wave energy to a utilizable form, which is usually electricity. The OWC is kept inside a fixed truncated vertical cylinder, which is a hollow structure...

Wang, Hao

2013-07-19T23:59:59.000Z

3

Multi-reanalysis comparison of variability in column water vapor and its analysis increment associated with Madden–Julian Oscillation  

Science Journals Connector (OSTI)

This study conducts a multi-reanalysis comparison of variability in column water vapor (CWV) represented in three reanalysis products (JRA-55, JRA-25, and ERA-Interim) associated with Madden–Julian Oscillation (MJO) in boreal winter, with emphasis ...

Satoru Yokoi

4

A review of oscillating water columns  

Science Journals Connector (OSTI)

...higher conversion efficiency than a Wells turbine, but there is no...energy conversion efficiency of the 1.25m diameter Wavegen turbine shown in figure-8...measurements. The efficiency of the turbine will be influenced...

2012-01-01T23:59:59.000Z

5

A review of oscillating water columns  

Science Journals Connector (OSTI)

...application is the Wells turbine/induction generator combination, and the leading...their power from the turbine/generator in times of plenty. A commercial...four wave-activated turbine generators. Between 1976 and 1979, a team...

2012-01-01T23:59:59.000Z

6

PCB fluxes from the sediment to the water column following resuspension A column experiment  

E-Print Network [OSTI]

PCB fluxes from the sediment to the water column following resuspension ­ A column experiment confirmed that many French rivers and lakes sediments are contaminated by PCBi at levels ranging from 50 of cubic meters of contaminated sediments and to improve the understanding of the behavior of PCB

Paris-Sud XI, Université de

7

A thermoacoustic oscillator powered by vaporized water and ethanol  

Science Journals Connector (OSTI)

We measure the temperature difference required to drive a thermoacoustic oscillator containing air water vapor and liquid water as the working fluids. The oscillator is composed of a large tube containing an array of narrow tubes connected at one end to a tank of liquid water. When the water is heated the temperature difference across the tube array increases until thermoacoustic oscillations occur. The temperature difference at the onset of oscillation is measured to be 56 ? ° C significantly smaller (by ? 200 ? ° C ) than the temperature measured when the tank is filled with dry air instead of water. The temperature difference can be further reduced to 47 ? ° C by using ethanol instead of water.

Daisuke Noda; Yuki Ueda

2013-01-01T23:59:59.000Z

8

The Oscillating Water Column Wave-energy Device  

Science Journals Connector (OSTI)

......length the maximum possible efficiency is 50, and that for the three-dimensional...expression is obtained for the efficiency of wave-energy absorption...length the maximum possible efficiency is 50%, and that for the...valve connected to a small turbine. This idea has been successfully......

D. V. EVANS

1978-12-01T23:59:59.000Z

9

PRIMARY RESEARCH PAPER Water column oxygen demand and sediment oxygen flux  

E-Print Network [OSTI]

PRIMARY RESEARCH PAPER Water column oxygen demand and sediment oxygen flux: patterns of oxygen dissolved oxygen (DO) levels often occur during summer in tidal creeks along the southeastern coast of the USA. We analyzed rates of oxygen loss as water-column biochemical oxygen demand (BOD5) and sediment

Mallin, Michael

10

Inexpensive Near-IR Sun Photometer for Measuring Total Column Water Vapor  

Science Journals Connector (OSTI)

An inexpensive two-channel near-IR sun photometer for measuring total atmospheric column water vapor (precipitable water) has been developed for use by the Global Learning and Observations to Benefit the Environment (GLOBE) environmental science ...

David R. Brooks; Forrest M. Mims III; Richard Roettger

2007-07-01T23:59:59.000Z

11

Accounting for water-column variability in shallow-water waveguide characterizations based on modal eigenvalues  

SciTech Connect (OSTI)

The influence of water-column variability on the characterization of shallow-water waveguides using modal eigenvalue information is considered. This work is based on the relationship between the acoustic pressure field in shallow water and the depth-dependent Green's function through the Hankel transform. In many practical situations, the Hankel transform can be approximated by a Fourier transform, in which case the Green's function is approximated by a horizontal wave number spectrum with discrete peaks corresponding with individual modal eigenvalues. In turn, the wave number data can be used in inverse algorithms to determine geoacoustic properties of the waveguide. Wave number spectra are estimated from measurements of a point-source acoustic field on a horizontal aperture array in the water column. For range-dependent waveguides, techniques analogous to using a short-time Fourier transform are employed to estimate range-dependent wave number spectra. In this work, water-column variability due to linear internal waves and mesoscale features are considered. It will be shown that these two types of variability impact the estimation of range-dependent modal eigenvalues in different ways. Approaches for accounting for these different types of variability will be discussed as they apply to waveguide characterization.

Becker, Kyle M. [Pennsylvania State University, Applied Research Laboratory, P.O. Box 30, State College, PA 16804-0030 (United States); Ballard, Megan S. [Applied Research Laboratories, University of Texas at Austin, Austin, TX 78713-8029 (United States)

2010-09-06T23:59:59.000Z

12

Autonomous Gliders Reveal Features of the Water Column Associated with Foraging by Adelie Penguins  

E-Print Network [OSTI]

SYMPOSIUM Autonomous Gliders Reveal Features of the Water Column Associated with Foraging by Ade associated with low temperatures, restricted sunlight for much of the year, high wind, sea ice, and limited

13

The effects of mixing energy on water column oil  

E-Print Network [OSTI]

/water system was mixed in a reactor and sampled after 48 h. Three experimental runs were performed for eight increasing mixing energies: 0 s?¹, 2.6 s?¹, 7.4 s?¹, 10.8 s?¹, 13.4 s?¹, 14.6 s?¹, 15.6 s?¹ and 20.4 s?¹. GC-MS was used to analyze the samples...

Rogers, Ellen Tiffany

2012-06-07T23:59:59.000Z

14

Lignin biomarkers as tracers of mercury sources in lakes water column  

E-Print Network [OSTI]

Lignin biomarkers as tracers of mercury sources in lakes water column Jean-Franc¸ois Ouellet � Marc the autochthonous from the allochthonous organic matter (OM), lignin derived biomarker signa- tures [Lambda, S/V, C/V, P/(V ? S), 3,5-Bd/V and (Ad/Al)v] were used. Since lignin is exclusively produced by terrigenous

Long, Bernard

15

Oil production from thin oil columns subject to water and gas coning  

E-Print Network [OSTI]

OIL PRODUCTION FROM THIN OIL COLUMNS SUBJECT TO MATER AND GAS CONING A Thesis by KMOK KIT CHAI Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1981... Major Subject: Petroleum Engineering OIL PRODUCTION FROM THIN OIL COLUMNS SUBJECT TO WATER AND GAS CONING A Thesis by KWOK KIT CHAI Approved as to style and content by airman of o t ee Member Member Head o Department May 1981 ABSTRACT Oil...

Chai, Kwok Kit

2012-06-07T23:59:59.000Z

16

Short-range precipitation forecasts using assimilation of simulated satellite water vapor profiles and column cloud liquid water amounts  

SciTech Connect (OSTI)

These observing system simulation experiments investigate the assimilation of satellite-observed water vapor and cloud liquid water data in the initialization of a limited-area primitive equations model with the goal of improving short-range precipitation forecasts. The assimilation procedure presented includes two aspects: specification of an initial cloud liquid water vertical distribution and diabatic initialization. The satellite data is simulated for the next generation of polar-orbiting satellite instruments, the Advanced Microwave Sounding Unit (AMSU) and the High-Resolution Infrared Sounder (HIRS), which are scheduled to be launched on the NOAA-K satellite in the mid-1990s. Based on cloud-top height and total column cloud liquid water amounts simulated for satellite data a diagnostic method is used to specify an initial cloud water vertical distribution and to modify the initial moisture distribution in cloudy areas. Using a diabatic initialization procedure, the associated latent heating profiles are directly assimilated into the numerical model. The initial heating is estimated by time averaging the latent heat release from convective and large-scale condensation during the early forecast stage after insertion of satellite-observed temperature, water vapor, and cloud water formation.

Wu, X.; Diak, G.R.; Hayden, C.M.; Young, J.A. [Univ. of Wisconsin, Madison, WI (United States)] [Univ. of Wisconsin, Madison, WI (United States)

1995-02-01T23:59:59.000Z

17

The sediment resuspension event scours dissolved phase contaminants from the water column. As a result, a short-term  

E-Print Network [OSTI]

The sediment resuspension event scours dissolved phase contaminants from the water column loading estimates to the southern basin in the absence of sediment resuspension, respectively. In southern Lake Michigan, the impact of the sediment resuspension event is magnified because of heavy atmospheric

NOAA Great Lakes Environmental Research Laboratory, Episodic Events

18

Heavy Flags Undergo Spontaneous Oscillations in Flowing Water Michael Shelley,1  

E-Print Network [OSTI]

Heavy Flags Undergo Spontaneous Oscillations in Flowing Water Michael Shelley,1 Nicolas; published 9 March 2005) By immersing a compliant yet self-supporting sheet into flowing water, we study locomotion. This transition is subcritical. Our results agree qualitatively with a simple fluid dynamical

Shelley, Michael

19

Potential oscillation during electrolysis of water in acidic solutions under numerous conditions  

Science Journals Connector (OSTI)

Abstract We have revealed that a novel potential oscillation occurs in hydrogen evolution reaction (HER) during water electrolysis, not only when H2SO4 solutions are used as electrolytes as has been reported in our earlier papers (Mukouyama et al., 2008; 2013), but also when a large variety of acid solutions are used as electrolytes. When the acid concentration is lower than ca. 0.1 M, the electrode potential oscillates spontaneously under current controlled conditions in a high overpotential region, e.g. more negative than ca. ?1.0 V vs. SHE. The oscillation appears by addition of a small amount of salts, such as LiClO4, Na2SO4, K2SO4 and MgSO4, even when the acid concentration is higher than ca. 0.1 M. We have also found that the oscillation occurs not only when Pt, Au or Cu is used as a working electrode as has been reported in the papers but also when various metal substrates such as Rh, Ag, Fe, Ni, W, Zn, Sn and In are used. It was revealed that the local pH at the electrode surface oscillates between acidic and basic synchronously with the potential oscillation. The mechanism of the oscillation can be explained by an autocatalytic bubble evolution and the changes in the local pH and in the concentration of dissolved hydrogen at the electrode surface due to the bubble evolution.

Yoshiharu Mukouyama; Ryusuke Nakazato; Tetsuaki Shiono; Shuji Nakanishi; Hiroshi Okamoto

2014-01-01T23:59:59.000Z

20

A Marine Autonomous Surface Craft for Long Duration, Spatially Explicit, Multi-Disciplinary Water Column Sampling in Coastal and Estuarine Systems  

Science Journals Connector (OSTI)

SCOAP (Surveying Coastal Ocean Autonomous Profiler) is a large catamaran Marine Autonomous Surface Craft (MASC) for unattended weeks-long, spatially explicit, multi-disciplinary oceanographic water column profile sampling in coastal/estuarine ...

Daniel L. Codiga

Note: This page contains sample records for the topic "oscillating water column" 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

Water flow processes in a soil column with a cylindrical macropore: Experiment and hierarchical modeling  

E-Print Network [OSTI]

interdomain water transfer could be estimated using mass balance calculations. In a hierarchical modeling

Mohanty, Binayak P.

22

Journal of Fluids and Structures 22 (2006) 135171 Water hammer with column separation: A historical review  

E-Print Network [OSTI]

in fully filled pipelines. This may occur in a water-hammer event when the pressure in a pipeline drops worse: in one water-hammer event many repetitions of cavity formation and collapse may occur. This paper-sectional pipe area (m2 ) a pressure wave speed (m/s) B constant in water-hammer compatibility equations (s/m2

Tijsseling, A.S.

23

Evidence of Intense Archaeal and Bacterial Methanotrophic Activity in the Black Sea Water Column  

Science Journals Connector (OSTI)

...al. (36). Water samples (1...degassing. The gas phase was subsequently...integrator. Nitrogen was used as the carrier gas, and separation...of methane, water was transferred...Crozier. 1976. Solubility of methane in distilled water and seawater...shallow and deep gas seeps methane...

Edith Durisch-Kaiser; Lucia Klauser; Bernhard Wehrli; Carsten Schubert

2005-12-01T23:59:59.000Z

24

Design of dual column water purification system for industrial gamma irradiator based of PUROLITE® resins  

Science Journals Connector (OSTI)

Abstract When gamma irradiators are not in use, they have to be stored in nuclear grade water pool. This water serves as shielding and the medium for the removal of generated heat. To prevent corrosion damage to the gamma source and other equipment a purification system controls the water quality. Also, this system serves as the make-up water system for supplies and maintains the de-ionized water level in the gamma source storage pool. In this paper, the design of the dual system for purification and make-up water for optimal water supply and its chemical parameters in the gamma source storage pool is presented. For this purpose, the characteristics of activated carbon purifier, anionic and cationic demineralizers have been determined. “Aerb Safety Standard”, “Purolite Ion Exchange Design Code” and “Canadian Water Refining Company Manual” have been used to design IR-136 gamma irradiator storage pool purification and make-up water system. The main objective of the design is to maintain water purity throughout the storage time.

Reza Gholizadeh Aghoyeh; Hossein Khalafi

2014-01-01T23:59:59.000Z

25

Vertical transport and residence time of chlorinated hydrocarbons in the open ocean water column  

Science Journals Connector (OSTI)

The vertical transport of PCBs and chlorinated hydrocarbon pesticides such as DDT compounds and HCH ... of their adsorbed and dissolved fractions in surface water surveyed in the Western Pacific, Eastern Indian.....

Shinsuke Tanabe; Ryo Tatsukawa

1983-04-01T23:59:59.000Z

26

Control of xenon oscillations in Advanced Heavy Water Reactor via two-stage decomposition  

Science Journals Connector (OSTI)

Abstract Xenon induced spatial oscillations developed in large nuclear reactors, like Advanced Heavy Water Reactor (AHWR) need to be controlled for safe operation. Otherwise, a serious situation may arise in which different regions of the core may undergo variations in neutron flux in opposite phase. If these oscillations are left uncontrolled, the power density and rate of change of power at some locations in the reactor core may exceed their respective thermal limits, resulting in fuel failure. In this paper, a state feedback based control strategy is investigated for spatial control of AHWR. The nonlinear model of AHWR including xenon and iodine dynamics is characterized by 90 states, 5 inputs and 18 outputs. The linear model of AHWR, obtained by linearizing the nonlinear equations is found to be highly ill-conditioned. This higher order model of AHWR is first decomposed into two comparatively lower order subsystems, namely, 73rd order ‘slow’ subsystem and 17th order ‘fast’ subsystem using two-stage decomposition. Composite control law is then derived from individual subsystem feedback controls and applied to the vectorized nonlinear model of AHWR. Through the dynamic simulations it is observed that the controller is able to suppress xenon induced spatial oscillations developed in AHWR and the overall performance is found to be satisfactory.

R.K. Munje; J.G. Parkhe; B.M. Patre

2015-01-01T23:59:59.000Z

27

Correlation between Electric Potential and Interfacial Tension Oscillations in a Water?Oil?Water System  

Science Journals Connector (OSTI)

Laboratoire des IMRCP, UMR au CNRS No. 5623, Université Paul Sabatier, 118, route de Narbonne, F-31062 Toulouse Cedex, France, and Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Avenida Universidad No. 1001, Col. Chamilpa, 62210 Cuernavaca, Morelos, México ... The experimental setup to observe potential oscillations was improved by Yoshikawa and co-workers9 by using a three-phase (U-tube) reactor geometry. ... To improve this, a Marangoni coeff. is proposed, the magnitude of which predicts well the presence of surfactant induced Marangoni convection in the systems studied. ...

Véronique Pimienta; Dominique Lavabre; Thomas Buhse; Jean-Claude Micheau

2004-04-28T23:59:59.000Z

28

Biological processes in the water column of the South Atlantic Bight: Zooplankton responses  

SciTech Connect (OSTI)

This study sought to determine and understand the major processes governing the abundance, distribution, composition and eventual fate of zooplankton on the southeastern shelf of the US in relation to water circulation. Over much of the shelf circulation is dominated by the Gulf Stream and/or atmospheric forcing. Most of our studies concentrated on processes on the middle and outer shelf. On the latter, pronounced biological production occurs year-round at frequent intervals and is due to Gulf Stream eddies which move by at an average frequency of one every week. These eddies are rich in nutrients which, when upwelled into the euphoric zone, lead to pronounced primary production which then triggers zooplankton production.

Paffenhofer, G.A.

1992-09-25T23:59:59.000Z

29

Biological processes in the water column of the South Atlantic Bight: Zooplankton responses. Final report  

SciTech Connect (OSTI)

This study sought to determine and understand the major processes governing the abundance, distribution, composition and eventual fate of zooplankton on the southeastern shelf of the US in relation to water circulation. Over much of the shelf circulation is dominated by the Gulf Stream and/or atmospheric forcing. Most of our studies concentrated on processes on the middle and outer shelf. On the latter, pronounced biological production occurs year-round at frequent intervals and is due to Gulf Stream eddies which move by at an average frequency of one every week. These eddies are rich in nutrients which, when upwelled into the euphoric zone, lead to pronounced primary production which then triggers zooplankton production.

Paffenhofer, G.A.

1992-09-25T23:59:59.000Z

30

Toxic sulfide concentrations in the sediments and water column of the Suwannee River estuary and its influence on hard clam survival  

E-Print Network [OSTI]

Toxic sulfide concentrations in the sediments and water column of the Suwannee River estuary that is grown to market size in estuarine sediments. Hydrogen sulfide, a natural metabolic poison known of hard clams used in field aquaculture areas in the Suwannee River estuary. Sulfide was found in sediment

Florida, University of

31

Wave power extraction from a bottom-mounted oscillating water column converter with a V-shaped channel  

Science Journals Connector (OSTI)

...CW Finkl. 2009 Ocean energy. Berlin, Germany...ME . 1981 Ocean wave energy conversion. New York, NY: Wiley Interscience...Justino. 1999 OWC wave energy devices with air flow...mathematical tables. New York, NY: Dover. 23 Mavrakos...

2014-01-01T23:59:59.000Z

32

Sliding Mode Control for Pressurized-Water Nuclear Reactors in load following operations with bounded xenon oscillations  

Science Journals Connector (OSTI)

Abstract One of the important operations in nuclear power plants is load-following in which imbalance of axial power distribution induces xenon oscillations. These oscillations must be maintained within acceptable limits otherwise the nuclear power plant could become unstable. Therefore, bounded xenon oscillation considered to be a constraint for the load-following operation. In this paper, sliding mode control (SMC) which is a robust nonlinear controller is designed to control the Pressurized-Water Nuclear Reactor (PWR) power for the load-following operation problem that ensures xenon oscillations are kept bounded within acceptable limits. The proposed controller uses constant axial offset (AO) strategy to maintain xenon oscillations to be bounded. The constant AO is a robust state constraint for load-following problem. The reactor core is simulated based on the two-point nuclear reactor model and one delayed neutron group. The stability analysis is given by means Lyapunov approach, thus the control system is guaranteed to be stable within a large range. The employed method is easy to implement in practical applications and moreover, the sliding mode control exhibits the desired dynamic properties during the entire output-tracking process independent of perturbations. Simulation results are presented to demonstrate the effectiveness of the proposed controller in terms of performance, robustness and stability. Results show that the proposed controller for the load-following operation is sufficiently effective so that the xenon oscillations are kept bounded in the considered region.

G.R. Ansarifar; S. Saadatzi

2015-01-01T23:59:59.000Z

33

Knowledge base expert system control of spatial xenon oscillations in pressurized water reactors  

Science Journals Connector (OSTI)

Current xenon oscillation control methods used in pressurized water reactors are knowledge intensive, and heuristic in nature. An expert system is developed to implement the heuristic constant axial offset control procedure to aid reactor operators in increasing the plant reliability by reducing the human error component of the failure probability. An expert system is written in the production system language, OPS5, with a forward chaining algorithm. It samples the reactor core with a certain time interval, evaluates the core status to determine the necessary corrective actions in terms of reactivity insertion, and selects the control parameter to realize this reactivity insertion. The amount of control action is determined using a knowledge base which consists of the differential rod worth curves, and the boron reactivity worth of a given reactor. The controller has been tested using a one-dimesional core model for verification of the rules and the code. It has been shown that, having the reactor dependent parameters in its knowledge base, the controller is able to follow a typical load demand for a daily cycle of a reactor, and is able to keep the axial offset within a target band.

Serhat Alten; Richard A Danofsky

1993-01-01T23:59:59.000Z

34

Bubbles at the top and bottom of the water column: the acoustical effects, and the use of acoustics to measure them  

Science Journals Connector (OSTI)

Bubbles of atmospheric gas can be entrained by breaking waves at the top of the water column: this bubble population is dynamic and will evolve through the effects of buoyancy gas exsolution and dissolution and the fragmentation and coalescence of bubbles. These processes are important to ambient noise sonar operation and the overall gas budget of the planet. At the base of the water column methanebubbles can occur in marine sediments a phenomenon important to the global methane budget to the petrochemical industry and to the stability of the sediment (e.g. for civil engineering purposes). This paper examines the acoustical effects of both of these populations and the ways in which acoustics can be used to measure them. Data will be presented from field trials including measurements of gassy marine sediments in UK waters and of wave?generated bubble clouds measured by an 11 m spar buoy deployed from 16th June to 18th July 2007 at a distance of 400 miles off the west coast of Portugal.

Timothy G. Leighton; David Coles; Michael A. Ainslie; Paul R. White

2008-01-01T23:59:59.000Z

35

The distribution of chitin in the water and sediment columns in the Gulf of Mexico and its geochemical significance  

E-Print Network [OSTI]

with distilled water. 0 2. The sample was then hydrolysed with HC1 (6N) for 6 'nours at 100 C. 3. The glucosamine in the neutralized hydrolysate was acetylated with acetylacetone (1. 0 ml of acetylacetone in 50 ml Na CO olution) 0 for 15 minutes at 100 C. 4... with distilled water. 0 2. The sample was then hydrolysed with HC1 (6N) for 6 'nours at 100 C. 3. The glucosamine in the neutralized hydrolysate was acetylated with acetylacetone (1. 0 ml of acetylacetone in 50 ml Na CO olution) 0 for 15 minutes at 100 C. 4...

Ho, Wai Kwok

2012-06-07T23:59:59.000Z

36

A common column density threshold for scattering at 3.6 mum and water-ice in molecular clouds  

E-Print Network [OSTI]

Context: Observations of scattered light in the 1-5 $\\mu$m range have revealed dust grains in molecular cores with sizes larger than commonly inferred for the diffuse interstellar medium. It is currently unclear whether these grains are grown within the molecular cores or are an ubiquitous component of the interstellar medium. Aims: We investigate whether the large grains necessary for efficient scattering at 1-5 mum are associated with the abundance of water-ice within molecular clouds and cores. Methods: We combined water-ice abundance measurements for sight lines through the Lupus IV molecular cloud complex with measurements of the scattered light at 3.6 mum for the same sight lines. Results: We find that there is a similar threshold for the cores in emission in scattered light at 3.6 mum (tau_9.7=0.15pm0.05, A_K=0.4pm0.2 as water-ice (tau_9.7=0.11pm0.01, A_K=0.19pm0.04) and that the scattering efficiency increases as the relative water-ice abundance increases. The ice layer increases the average grain siz...

Andersen, M; Steinacker, J; Tothill, N

2014-01-01T23:59:59.000Z

37

Evidence for two modes of water release in Comet 103P/Hartley 2: Distributions of column density, rotational temperature, and ortho–para ratio  

Science Journals Connector (OSTI)

This paper presents long-slit spectra of H2O emission from the inner coma of Comet 103P/Hartley 2, acquired with NIRSPEC/Keck 2 during the comet’s close approach to Earth in 2010. On UT 19.6 October 2010 the slit was oriented nearly orthogonal to the projected (in the plane of the sky) Sun–comet line, and the H2O rotational temperature and column density showed similar spatial distributions as a function of projected distance from the nucleus. On UT 22.5 October, the slit was oriented along the Sun–comet line, and the rotational temperatures revealed pronounced asymmetry while the column densities were nearly symmetric about the nucleus. We suggest this dichotomy reflects two qualitatively different mechanisms of volatile release, which introduce distinct rotational distributions in the sublimated material. Future modeling can test this hypothesis. We also report new retrievals of water nuclear spin species (ortho, para) in this comet, and we present the ortho-to-para ratio (OPR) for various projected nucleocentric distances. Our most precise individual measurement is OPR = 2.59 ± 0.13, corresponding to a nuclear spin temperature (Tspin) of 31 ± 3 K. A weighted mean of five independent measurements provides OPR = 2.79 ± 0.13 ( T spin = 37 - 4 + 8 K ). Hartley 2 is the first comet for which the OPR has been measured in multiple apparitions. Our values (in 2010) are in good agreement with those obtained two apparitions earlier by the Infrared Space Observatory. Since the comet lost a substantial amount of material between 1998 and 2010, we see no evidence for variation of the OPR with depth in the nucleus. Further discussion of the advantages, assumptions, and biases introduced by various approaches when quantifying nuclear spin species (observing techniques, models and model parameters, sources of uncertainty) would likely aid in interpreting the \\{OPRs\\} measured in cometary volatiles.

Boncho P. Bonev; Geronimo L. Villanueva; Lucas Paganini; Michael A. DiSanti; Erika L. Gibb; Jacqueline V. Keane; Karen J. Meech; Michael J. Mumma

2013-01-01T23:59:59.000Z

38

Oscillator detector  

SciTech Connect (OSTI)

An alien liquid detector employs a monitoring element and an oscillatory electronic circuit for maintaining the temperature of the monitoring element substantially above ambient temperature. The output wave form, eg., frequency of oscillation or wave shape, of the oscillatory circuit depends upon the temperaturedependent electrical characteristic of the monitoring element. A predetermined change in the output waveform allows water to be discriminated from another liquid, eg., oil. Features of the invention employing two thermistors in two oscillatory circuits include positioning one thermistor for contact with water and the other thermistor above the oil-water interface to detect a layer of oil if present. Unique oscillatory circuit arrangements are shown that achieve effective thermistor action with an economy of parts and energizing power. These include an operational amplifier employed in an astable multivibrator circuit, a discrete transistor-powered tank circuit, and use of an integrated circuit chip.

Potter, B.M.

1980-05-13T23:59:59.000Z

39

Reference Model 6 (RM6): Oscillating Wave Energy Converter.  

SciTech Connect (OSTI)

This report is an addendum to SAND2013-9040: Methodology for Design and Economic Analysis of Marine Energy Conversion (MEC) Technologies. This report describes an Oscillating Water Column Wave Energy Converter reference model design in a complementary manner to Reference Models 1-4 contained in the above report. In this report, a conceptual design for an Oscillating Water Column Wave Energy Converter (WEC) device appropriate for the modeled reference resource site was identified, and a detailed backward bent duct buoy (BBDB) device design was developed using a combination of numerical modeling tools and scaled physical models. Our team used the methodology in SAND2013-9040 for the economic analysis that included costs for designing, manufacturing, deploying, and operating commercial-scale MEC arrays, up to 100 devices. The methodology was applied to identify key cost drivers and to estimate levelized cost of energy (LCOE) for this RM6 Oscillating Water Column device in dollars per kilowatt-hour (%24/kWh). Although many costs were difficult to estimate at this time due to the lack of operational experience, the main contribution of this work was to disseminate a detailed set of methodologies and models that allow for an initial cost analysis of this emerging technology. This project is sponsored by the U.S. Department of Energy's (DOE) Wind and Water Power Technologies Program Office (WWPTO), within the Office of Energy Efficiency & Renewable Energy (EERE). Sandia National Laboratories, the lead in this effort, collaborated with partners from National Laboratories, industry, and universities to design and test this reference model.

Bull, Diana L; Smith, Chris; Jenne, Dale Scott; Jacob, Paul; Copping, Andrea; Willits, Steve; Fontaine, Arnold; Brefort, Dorian; Gordon, Margaret Ellen; Copeland, Robert; Jepsen, Richard A.

2014-10-01T23:59:59.000Z

40

" Row: NAICS Codes;" " Column...  

U.S. Energy Information Administration (EIA) Indexed Site

2 Number of Establishments by Usage of General Energy-Saving Technologies, 2010;" " Level: National Data; " " Row: NAICS Codes;" " Column: Usage within General Energy-Saving...

Note: This page contains sample records for the topic "oscillating water column" 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

Column Initialization 1 Initializing Distillation Column Models 1  

E-Print Network [OSTI]

Column Initialization 1 Initializing Distillation Column Models 1 Roger Fletcher \\Lambda with the optimisation of distillation column models by non­ linear programming are considered. The paper presents of the distillation column model. A certain limiting case of the column model is examined, that of infinite reflux

Dundee, University of

42

Xenon oscillation in \\{SCWRs\\}  

Science Journals Connector (OSTI)

Xenon oscillation in Supercritical Water Cooled Reactors is analyzed in this paper. Due to the global nature of this phenomenon full-detail models are not necessary. A program system has been developed with a neutronics module – using SCALE with a cross section homogenization process – coupled to a thermal hydraulics module completed with the xenon poisoning differential equations. The two most important feedbacks – coolant temperature and Doppler – are examined separately to acquire a full picture of the nature of the oscillations. It is found that the one-pass PWR-SC and the three-pass HPLWR are stable against xenon oscillations.

T. Reiss; S. Fehér; Sz. Czifrus

2011-01-01T23:59:59.000Z

43

Nuclear reactor control column  

DOE Patents [OSTI]

The nuclear reactor control column comprises a column disposed within the nuclear reactor core having a variable cross-section hollow channel and containing balls whose vertical location is determined by the flow of the reactor coolant through the column. The control column is divided into three basic sections wherein each of the sections has a different cross-sectional area. The uppermost section of the control column has the greatest cross-sectional area, the intermediate section of the control column has the smallest cross-sectional area, and the lowermost section of the control column has the intermediate cross-sectional area. In this manner, the area of the uppermost section can be established such that when the reactor coolant is flowing under normal conditions therethrough, the absorber balls will be lifted and suspended in a fluidized bed manner in the upper section. However, when the reactor coolant flow falls below a predetermined value, the absorber balls will fall through the intermediate section and into the lowermost section, thereby reducing the reactivity of the reactor core and shutting down the reactor.

Bachovchin, Dennis M. (Plum Borough, PA)

1982-01-01T23:59:59.000Z

44

Estimation of the xenon concentration and delayed neutrons precursors densities in the pressurized-water nuclear reactors (PWR) with sliding mode observer considering xenon oscillations  

Science Journals Connector (OSTI)

Abstract One of the important operations in nuclear power plants is load-following in which the imbalance in axial power distribution induces xenon oscillations. These oscillations must be maintained within acceptable limits otherwise the nuclear power plant could become unstable. Therefore, bounded xenon oscillation is considered to be a constraint for the load-following operation. On the other hands, precursors produce delayed neutrons which are important with respect to reactor period and control, but xenon concentration and precursors densities cannot be measured directly. In this paper, the non-linear sliding mode observer which has the robust characteristics facing the parameters uncertainties and disturbances is proposed based on the two point nuclear reactor model equations with three groups of the delayed neutrons to estimate the xenon concentration and delayed neutrons precursor densities of the pressurized-water nuclear reactor (PWR) using reactor power measurements. The stability analysis is provided by means of the Lyapunov approach, thus the system is guaranteed to be stable over a wide range. The employed method is easy to implement. This estimation is done taking into account the effects of reactivity feedback due to temperature and xenon concentration. Simulation results clearly show that the sliding mode observer follows the actual system variables accurately and is satisfactory in the presence of the parameter uncertainties and disturbances.

M.H. Esteki; G.R. Ansarifar; M. Arghand

2015-01-01T23:59:59.000Z

45

Never Drying Column  

Science Journals Connector (OSTI)

......Department, University of Missouri-Kansas City, Kansas City, Missouri 64110 Column chromatography...Corporation, St. Louis, Missouri Question I. Many smaller...inor- ganic gases to heavy naphthas and crude oil fractions. The variety......

Bahman Nassim

1978-11-01T23:59:59.000Z

46

Experimental manipulation of connectivity and common carp: the effects on native fish, water-column invertebrates, and amphibians in Delta Marsh, Manitoba.  

E-Print Network [OSTI]

??Common carp (Cyprinus carpio) have been hypothesized to contribute to declines in aquatic macrophytes, waterfowl, and water clarity in Delta Marsh, an 18,500 ha freshwater… (more)

Parks, Candace R.

2006-01-01T23:59:59.000Z

47

Neutrino oscillations  

Science Journals Connector (OSTI)

...the energy released in the nuclear transition. If neutrinos have...momentum p is produced in a nuclear b-decay. At time t = 0 the...neutrino oscillations in x 3 only vacuum oscillations were considered...of muon neutrinos from the accelerator complex at Fermilab. The neutrinos...

2002-01-01T23:59:59.000Z

48

Proceedings of the US Hydrographic Conference, New Orleans, LA, 25-28 Mar 2013 WATER-COLUMN VARIABILITY ASSESSMENT FOR UNDERWAY PROFILERS  

E-Print Network [OSTI]

Proceedings of the US Hydrographic Conference, New Orleans, LA, 25-28 Mar 2013 1 WATER trials and from analysis of existing data sets are presented. #12;Proceedings of the US Hydrographic Conference, New Orleans, LA, 25-28 Mar 2013 2 Introduction The application of timely measurements of sound

New Hampshire, University of

49

Diatom species composition and abundance in water column assemblages from five drill sites in Prydz Bay, Antarctica, Ocean Drilling Program Leg 119: distributional patterns  

E-Print Network [OSTI]

distribution. . . . . . . . . . . . . . . , . . . . . , . . . . . . 37 17 Contour plots of Rhizosolenia alara abundance (cells I I) in the upper 200 m along the transect at the Prydz Bay drill sites, 18 Jan, - 3 Feb, 1988. (A) Temporal distribution, (B... (austral spring, summer, and early autumn), with an interim period of open water lasting from one to several months, dependent primarily on latitude. The maximum sea ice cover is found in September-October, covering around 20 x 106 km2, while in February...

Kang, Sung-Ho

2012-06-07T23:59:59.000Z

50

Electrochemical continuous decomposition of chloroform and other volatile chlorinated hydrocarbons in water using a column type metal impregnated carbon fiber electrode  

SciTech Connect (OSTI)

Trihalomethane and other chlorinated hydrocarbons are known to be toxic to human health. However, removal of these compounds from water is not easy. The authors attempted continuous electrochemical decomposition of chloroform that is the main compound of trihalomethanes and some toxic chlorinated hydrocarbons in water using a metal-impregnated CFE, concentration of chloroform in 0.5 M K{sub 2}SO{sub 4} (the supporting electrolyte) solution was decreased from 0.23m mol/L to below the limit of detection of their analysis system (1 ppm) at a flow rate of 1 mL/min. The main product of electrolysis was methane. This high efficiency, determined by the chemical yield, hardly changed at a flow rate of 20 mL/min at a Ag-impregnated CFE. At a flow rate of 1 mL/min, chloroform was degraded with a decomposition efficiency of almost 100% even in the solution without the supporting electrolyte, whereas at a higher flow rate, the efficiency for the decomposition of chloroform decreased with a decrease in the concentration of the supporting electrolyte. Tetrachloroethylene, 1,1,1-trichloroethane, and 1,1,2-trichloroethane were also decomposed at a Ag-impregnated CFE with an efficiency of almost 100%.

Sonoyama, Noriyuki; Sakata, Tadayoshi

1999-10-01T23:59:59.000Z

51

A long baseline RICH with a 27-kiloton water target and radiator for detection of neutrino oscillations  

SciTech Connect (OSTI)

A 27 kt water volume is investigated as a target for a long baseline neutrino beam from CERN to Gran Sasso. Charged secondaries from the neutrino interactions produce Cherenkov photons in water which are imaged as rings by a spherical mirror. The photon detector elements are 14 400 photomultipliers (PM`s) of 127 mm diameter or 3600 HPD`s of 250 mm diameter with single photon sensitivity. A coincidence signal of about 300 pixel elements in time with the SPS beam starts readout in bins of 1 ns over a period of 128 ns. Momentum, direction, and velocity of hadrons and mucons are determined from the width, center, and radius of the rings, respectively. Momentum is measured if multiple scattering dominates the ring width, as is the case for most of the particles of interest. Momentum, direction, and velocity of hadrons and muons are determined from the width, center, and radius of the rings, respectively. Momentum is measured if multiple scattering dominates the ring width, as is the case for most of the particles of interest. Momentum resolutions of 1-10%, mass resolutions of 5-50 MeV, and direction resolutions of < 1 mrad are achievable. Thresholds in water for muons, pions, kaons, and protons are 0.12, 0.16, 0.55, and 1.05 GeV/c, respectively. Electrons and gammas can be measured with energy resolution {sigma}{sub E}/E{approx}8.5%/{radical}E(GeV) and with direction resolution {approx} 1 mrad. The detector can be sited either inside a Gran Sasso tunnel or above ground because it is directional and the SPS beam is pulsed; thus the rejection of cosmic ray background is excellent.

Ypsilantis, T.; Seguinot, J.; Zichichi, A.

1997-01-01T23:59:59.000Z

52

Neutrino oscillations  

Science Journals Connector (OSTI)

...Solar neutrino oscillations The thermonuclear fusion reactions in the core of the Sun...dominant source of solar energy is the fusion process 4p !4 He + 2n e + 2e...related to the 4p ! 4He+2n e +2e+ fusion rate. Consequently, the theoretical...

2002-01-01T23:59:59.000Z

53

Single-Column Modeling  

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

C.J. Somerville and S. F. lacobellis C.J. Somerville and S. F. lacobellis Climate Research Division Scripps Institution of Oceanography University of California, San Diego La Jolla, CA 92093-0224 Our project is centered around a computationally efficient and economical one-dimensional (vertical) model, resembling a single column of a general circulation model (GCM) grid, applied to the experimental site of the Atmospheric Radiation Measurement (ARM) Program. The model contains a full set of modern GCM parameterizations of subgrid physical processes. To force the model, the advective terms in the budget equations are specified observationally from operational numerical weather prediction analyses. These analyses, based on four-dimensional data assimilation techniques, provide dynamically consistent wind fields and horizontal gradients

54

" Column: Energy-Consumption Ratios;"  

U.S. Energy Information Administration (EIA) Indexed Site

" Level: National Data; " " Row: Values of Shipments within NAICS Codes;" " Column: Energy-Consumption Ratios;" " Unit: Varies." ,,,,"Consumption" ,,,"Consumption","per...

55

Two-Column Aerosol Project  

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

help find the answer, the Department of Energy's Atmospheric Radiation Measurement (ARM) Climate Research Facility is conducting the Two-Column Aerosol Project (TCAP) at Cape Cod...

56

Structure of columns in monkey striate cortex induced by luminant-contrast and color-contrast stimulation  

Science Journals Connector (OSTI)

...6, 7) reported columns induced by oscillating B/W, vertically oriented stripes which...superimpose the density outlines of a string of columns generated by B/W stimulation...magnification they appear as beads on a string- i.e., periodic densities along...

M L Crawford; L S Meharg; D A Johnston

1982-01-01T23:59:59.000Z

57

High pressure humidification columns: Design equations, algorithm, and computer code  

SciTech Connect (OSTI)

This report describes the detailed development of a computer model to simulate the humidification of an air stream in contact with a water stream in a countercurrent, packed tower, humidification column. The computer model has been developed as a user model for the Advanced System for Process Engineering (ASPEN) simulator. This was done to utilize the powerful ASPEN flash algorithms as well as to provide ease of use when using ASPEN to model systems containing humidification columns. The model can easily be modified for stand-alone use by incorporating any standard algorithm for performing flash calculations. The model was primarily developed to analyze Humid Air Turbine (HAT) power cycles; however, it can be used for any application that involves a humidifier or saturator. The solution is based on a multiple stage model of a packed column which incorporates mass and energy, balances, mass transfer and heat transfer rate expressions, the Lewis relation and a thermodynamic equilibrium model for the air-water system. The inlet air properties, inlet water properties and a measure of the mass transfer and heat transfer which occur in the column are the only required input parameters to the model. Several example problems are provided to illustrate the algorithm`s ability to generate the temperature of the water, flow rate of the water, temperature of the air, flow rate of the air and humidity of the air as a function of height in the column. The algorithm can be used to model any high-pressure air humidification column operating at pressures up to 50 atm. This discussion includes descriptions of various humidification processes, detailed derivations of the relevant expressions, and methods of incorporating these equations into a computer model for a humidification column.

Enick, R.M. [Pittsburgh Univ., PA (United States). Dept. of Chemical and Petroleum Engineering; Klara, S.M. [USDOE Pittsburgh Energy Technology Center, PA (United States); Marano, J.J. [Burns and Roe Services Corp., Pittsburgh, PA (United States)

1994-07-01T23:59:59.000Z

58

HEAT TRANSFER ANALYSIS FOR FIXED CST AND RF COLUMNS  

SciTech Connect (OSTI)

In support of a small column ion exchange (SCIX) process for the Savannah River Site waste processing program, transient and steady state two-dimensional heat transfer models have been constructed for columns loaded with cesium-saturated crystalline silicotitanate (CST) or spherical Resorcinol-Formaldehyde (RF) beads and 6 molar sodium tank waste supernate. Radiolytic decay of sorbed cesium results in heat generation within the columns. The models consider conductive heat transfer only with no convective cooling and no process flow within the columns (assumed column geometry: 27.375 in ID with a 6.625 in OD center-line cooling pipe). Heat transfer at the column walls was assumed to occur by natural convection cooling with 35 C air. A number of modeling calculations were performed using this computational heat transfer approach. Minimal additional calculations were also conducted to predict temperature increases expected for salt solution processed through columns of various heights at the slowest expected operational flow rate of 5 gpm. Results for the bounding model with no process flow and no active cooling indicate that the time required to reach the boiling point of {approx}130 C for a CST-salt solution mixture containing 257 Ci/liter of Cs-137 heat source (maximum expected loading for SCIX applications) at 35 C initial temperature is about 6 days. Modeling results for a column actively cooled with external wall jackets and the internal coolant pipe (inlet coolant water temperature: 25 C) indicate that the CST column can be maintained non-boiling under these conditions indefinitely. The results also show that the maximum temperature of an RF-salt solution column containing 133 Ci/liter of Cs-137 (maximum expected loading) will never reach boiling under any conditions (maximum predicted temperature without cooling: 88 C). The results indicate that a 6-in cooling pipe at the center of the column provides the most effective cooling mechanism for reducing the maximum temperature with either ion exchange material. Sensitivity calculations for the RF resin porosity, the ambient external column temperature, and the cooling system configuration were performed under the baseline conditions to assess the impact of these parameters on the maximum temperatures. It is noted that the cooling mechanism at the column boundary (forced versus natural convection) and the cooling system configuration significantly impact the maximum temperatures. The analysis results provide quantitative information associated with process temperature control requirements and management of the SCIX column.

Lee, S

2007-10-17T23:59:59.000Z

59

Oscillation annealing and driver/tire load torque estimation in Electric Power Steering Systems  

E-Print Network [OSTI]

design an optimal control to reject oscillations of the steering column, then we device a new observer with a very good precision and very little phase lag. Mechanical Model Tyre/Road Friction Model Reference

Paris-Sud XI, Université de

60

Neutrino Oscillation Search Neutrino Oscillation Search  

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

EPS HEP 2007 MiniBooNE, Part 2: MiniBooNE, Part 2: First Results of the Muon-To-Electron First Results of the Muon-To-Electron Neutrino Oscillation Search Neutrino Oscillation...

Note: This page contains sample records for the topic "oscillating water column" 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

MHK Technologies/Nesheim Oscillating Device | Open Energy Information  

Open Energy Info (EERE)

Nesheim Oscillating Device Nesheim Oscillating Device < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Nesheim Oscillating Device.jpg Technology Profile Primary Organization Ing Arvid Nesheim Technology Resource Click here Wave Technology Type Click here Oscillating Wave Surge Converter Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description The Nesheim osillating device is composed of an annular shaped floater a floating column a universal joint mechanism and an electrical generator The universal joint mechanism enables relative upwards downwards and pivotal movement between the floater and column The column is provided with an air chamber to provide buoyancy The lower end of the column is connected to an anchor on the seafloor The design of the device enables both vertical and pivotal movement between the floater and the column These features facilitate high efficiency energy capture as the device can capture different forms of motion e g vertical and horizontal The device is attached to a modular buoy system that can be arranged to minimize the mooring line forces and horizontal displacement of the device The performance of the device may be remotely monitored and controlled via a subsea cable

62

Oscillations in glow discharges  

E-Print Network [OSTI]

OSCILLATIONS IN GLOW DISCHARGES A Dissertation By Tom Prickett, Jr. June 1950 Approved as to style and content by Chairman of Committee OSCILLATIONS IN GLOW DISCHARGES A Dissertation By Tom Prickett, Jr* June 1950 OSCILLATIONS IN GLOW... 1950 CONTENTS Introduction ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 1 I. Review of Plasma Oscillations in Gas Discharges ? . . 2 II. Review of Relaxation Processes in Gas Discharges ? . 13 III. Report of Laboratory Investigation...

Prickett, Tom

1950-01-01T23:59:59.000Z

63

Virus Transport in Saturated and Unsaturated Sand Columns  

Science Journals Connector (OSTI)

...demonstrated in bubble column experiments...pH and ionic strength, and various...application of sewage sludges. Appl. Environ...z-potential of gas bubbles. J. Colloid...the role of the gas-water interface...pH and ionic strength (IS). The...

S. Torkzaban; S. M. Hassanizadeh; J. F. Schijven; H. A. M. de Bruin; A. M. de Roda Husman

64

WASTEWATER TREATMENT OVER SAND COLUMNS  

E-Print Network [OSTI]

93/0096 WASTEWATER TREATMENT OVER SAND COLUMNS TREATMENT YIELDS, LOCALISATION OF THE BIOMASS Domestic wastewater treatment by infiltration-percolation is a process that becomming common in France, a greater depth for desinfection purposes. KEYWORDS Wastewater treatment, Infiltration-percolation. Sand

Paris-Sud XI, Université de

65

Reference Model 5 (RM5): Oscillating Surge Wave Energy Converter  

SciTech Connect (OSTI)

This report is an addendum to SAND2013-9040: Methodology for Design and Economic Analysis of Marine Energy Conversion (MEC) Technologies. This report describes an Oscillating Water Column Wave Energy Converter (OSWEC) reference model design in a complementary manner to Reference Models 1-4 contained in the above report. A conceptual design for a taut moored oscillating surge wave energy converter was developed. The design had an annual electrical power of 108 kilowatts (kW), rated power of 360 kW, and intended deployment at water depths between 50 m and 100 m. The study includes structural analysis, power output estimation, a hydraulic power conversion chain system, and mooring designs. The results were used to estimate device capital cost and annual operation and maintenance costs. The device performance and costs were used for the economic analysis, following the methodology presented in SAND2013-9040 that included costs for designing, manufacturing, deploying, and operating commercial-scale MEC arrays up to 100 devices. The levelized cost of energy estimated for the Reference Model 5 OSWEC, presented in this report, was for a single device and arrays of 10, 50, and 100 units, and it enabled the economic analysis to account for cost reductions associated with economies of scale. The baseline commercial levelized cost of energy estimate for the Reference Model 5 device in an array comprised of 10 units is $1.44/kilowatt-hour (kWh), and the value drops to approximately $0.69/kWh for an array of 100 units.

Yu, Y. H.; Jenne, D. S.; Thresher, R.; Copping, A.; Geerlofs, S.; Hanna, L. A.

2015-01-01T23:59:59.000Z

66

Multigraph Conditions for Multistability, Oscillations  

E-Print Network [OSTI]

[10]. Some common biochemical oscillators, such as calcium oscillations [11] and glycolytic of both. Many biochemical oscillator models contain an auto- catalytic loop, which occurs when

Craciun, Gheorghe

67

Nonlinear Xenon Oscillations  

Science Journals Connector (OSTI)

Space-independent xenon oscillations are linearly unstable at high neutron flux, ... coefficient is too small. These linearly unstable oscillations typically develop into stable limit cycles when nonlinear neutro...

David L. Hetrick

1989-01-01T23:59:59.000Z

68

Phenomenology of Neutrino Oscillations  

E-Print Network [OSTI]

The phenomenology of solar, atmospheric, supernova and laboratory neutrino oscillations is described. Analytical formulae for matter effects are reviewed. The results from oscillations are confronted with neutrinoless double beta decay.

G. Rajasekaran

2000-04-17T23:59:59.000Z

69

MHK Technologies/Oscillating Cascade Power System OCPS | Open Energy  

Open Energy Info (EERE)

Oscillating Cascade Power System OCPS Oscillating Cascade Power System OCPS < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Oscillating Cascade Power System OCPS.jpg Technology Profile Primary Organization New Energy Solutions LLC Technology Resource Click here Current Technology Type Click here Oscillating Wave Surge Converter Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description The OCPS generator consists of a cascade of vertical hydrofoils submerged in moving water This array of hydrofoils oscillates in antiphase at resonance flutter in a slow swimming motion resulting in maximum power transfer from flowing water to electricity The system efficiently converts the oscillating mechanical energy into a steady electric current A 60 overall water to wire efficiency was demonstrated at the proof of concept test and 65 or better overall efficiency is projected using the new engineering advances incorporated since the test in the commercial model

70

ARM - Field Campaign - Summer 1994 Single Column Model IOP  

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

govCampaignsSummer 1994 Single Column Model IOP govCampaignsSummer 1994 Single Column Model IOP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Summer 1994 Single Column Model IOP 1994.07.01 - 1994.07.31 Lead Scientist : David Randall Data Availability Data Plots from Colorado State University Data Plots from Livermore National Laboratory Actual data files for a number of past SCM IOPs are available from the ARM Archive. For data sets, see below. Description These seasonal SCM IOPs are conducted at the Southern Great Plains to enhance the frequency of observations for SCM uses, particularly vertical soundings of temperature, water vapor, and winds. The SCM IOPs are conducted for a period of 21 days. During that time, radiosondes are launched at the Central Facility and the four boundary facilities eight

71

ARM - Field Campaign - Winter 1994 Single Column Model IOP  

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

govCampaignsWinter 1994 Single Column Model IOP govCampaignsWinter 1994 Single Column Model IOP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Winter 1994 Single Column Model IOP 1994.01.01 - 1994.01.31 Lead Scientist : David Randall Data Availability Data Plots from Colorado State University Data Plots from Livermore National Laboratory Actual data files for a number of past SCM IOPs are available from the ARM Archive. For data sets, see below. Description These seasonal SCM IOPs are conducted at the Southern Great Plains to enhance the frequency of observations for SCM uses, particularly vertical soundings of temperature, water vapor, and winds. The SCM IOPs are conducted for a period of 21 days. During that time, radiosondes are launched at the Central Facility and the four boundary facilities eight

72

ARM - Field Campaign - Fall 1995 Single Column Model IOP  

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

Single Column Model IOP Single Column Model IOP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Fall 1995 Single Column Model IOP 1995.09.01 - 1995.10.31 Lead Scientist : David Randall Data Availability Data Plots from Colorado State University Data Plots from Livermore National Laboratory Actual data files for a number of past SCM IOPs are available from the ARM Archive. For data sets, see below. Description These seasonal SCM IOPs are conducted at the Southern Great Plains to enhance the frequency of observations for SCM uses, particularly vertical soundings of temperature, water vapor, and winds. The SCM IOPs are conducted for a period of 21 days. During that time, radiosondes are launched at the Central Facility and the four boundary facilities eight

73

Relative Retention Data for an Ethofat Column  

Science Journals Connector (OSTI)

......Retention Data for an Ethofat Column David P. Mowry Marathon Oil Company, Littleton, Colorado 80121 ture. RECIPROCAL...Retention Data for an Ethofat Column by David P. Mowry, Marathon 011 Company, Littleton, Colorado 80121 Relative retention......

David P. Mowry

1966-11-01T23:59:59.000Z

74

Heat transfer to a horizontal cylinder in a shallow bubble column  

Science Journals Connector (OSTI)

Abstract Heat transfer coefficient correlations for tall bubble columns are unable to predict heat transfer in shallow bubble columns, which have unique geometry and fluid dynamics. In this work, the heat transfer coefficient is measured on the surface of a horizontal cylinder immersed in a shallow air–water bubble column. Superficial velocity, liquid depth, and cylinder height and horizontal position with respect to the sparger orifices are varied. The heat transfer coefficient is found to increase with height until reaching a critical height, and a dimensionless, semi-theoretical correlation is developed that incorporates superficial velocity, liquid properties, and height. Additionally, the more minor effects of flow regime, column region, and bubble impact are discussed. Notably, the heat transfer coefficient can be as high in the region of bubble coalescence as in the bulk of the column, but only if bubbles impact the cylinder. The correlation and discussion provide a framework for modeling and designing shallow, coil-cooled bubble columns.

Emily W. Tow; John H. Lienhard V

2014-01-01T23:59:59.000Z

75

Chloride and Lithium Transport in Large Arrays of Undisturbed Silt Loam and Sandy Loam Soil Columns  

Science Journals Connector (OSTI)

...concentrations of surface-applied agrochemicals in subsurface tile drainage lines or...columns. This means that the soil composition, together with the particular flow...Warington. 1882. On the amount and composition of the rain and drainage water collected...

M. Saleem Akhtar; Tammo S. Steenhuis; Brian K. Richards; Murray B. McBride

76

Solutions diversification in a column generation algorithm  

E-Print Network [OSTI]

Solutions diversification in a column generation algorithm N. Touati a L. L´etocart a A. Nagih b a Column generation algorithms have been specially designed for solving mathemat- ical programs with a huge-based techniques. A more classical approach, known as "intensification", consists in inserting a set of columns

Létocart, Lucas

77

Process Svstems Enaineerina Instability of Distillation Columns  

E-Print Network [OSTI]

Process Svstems Enaineerina , Instability of Distillation Columns Elling W. Jacobsen and Sigurd recognized, distillation columns, operating with reflux and boilup as independent inputs, may have The dynamic behavior of distillation columns has been stud- ied quite extensively over the past decades

Skogestad, Sigurd

78

Vivapure Metal Chelate Mega spin columns  

E-Print Network [OSTI]

®® Vivapure Metal Chelate Mega spin columns Hisn Technical data and operating instructions. For in vitro use only. #12;2 Handling overview Vivapure Metal Chelate Mega spin columns - for the purification of proteins with poly-histidine tags Storage conditions Vivapure Metal Chelate Mega spin columns can be stored

Lebendiker, Mario

79

Slime mould electronic oscillators  

E-Print Network [OSTI]

We construct electronic oscillator from acellular slime mould Physarum polycephalum. The slime mould oscillator is made of two electrodes connected by a protoplasmic tube of the living slime mould. A protoplasmic tube has an average resistance of 3~MOhm. The tube's resistance is changing over time due to peristaltic contractile activity of the tube. The resistance of the protoplasmic tube oscillates with average period of 73~sec and average amplitude of 0.6~MOhm. We present experimental laboratory results on dynamics of Physarum oscillator under direct current voltage up to 15~V and speculate that slime mould P. polycephalum can be employed as a living electrical oscillator in biological and hybrid circuits.

Adamatzky, Andrew

2014-01-01T23:59:59.000Z

80

Active-bridge oscillator  

SciTech Connect (OSTI)

An active bridge oscillator is formed from a differential amplifier where positive feedback is a function of the impedance of one of the gain elements and a relatively low value common emitter resistance. This use of the nonlinear transistor parameter h stabilizes the output and eliminates the need for ALC circuits common to other bridge oscillators.

Wessendorf, Kurt O. (Albuquerque, NM)

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "oscillating water column" 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

Quantum Rabi oscillations in graphene  

Science Journals Connector (OSTI)

Graphene has been theoretically shown to exhibit anomalous Rabi oscillations (AROs) far from resonance in addition to conventional Rabi oscillations close to resonance (classical light...

Enamullah; Kumar, Vipin; Kumar, Upendra; Setlur, Girish S

2014-01-01T23:59:59.000Z

82

ENGINEERING DEVELOPMENT OF SLURRY BUBBLE COLUMN REACTOR (SBCR) TECHNOLOGY  

SciTech Connect (OSTI)

The major technical objectives of this program are threefold: (1) to develop the design tools and a fundamental understanding of the fluid dynamics of a slurry bubble column reactor to maximize reactor productivity, (2) to develop the mathematical reactor design models and gain an understanding of the hydrodynamic fundamentals under industrially relevant process conditions, and (3) to develop an understanding of the hydrodynamics and their interaction with the chemistries occurring in the bubble column reactor. Successful completion of these objectives will permit more efficient usage of the reactor column and tighter design criteria, increase overall reactor efficiency, and ensure a design that leads to stable reactor behavior when scaling up to large-diameter reactors. Washington University's work during the reporting period involved the implementation of the automated calibration device, which will provide an advanced method of determining liquid and slurry velocities at high pressures. This new calibration device is intended to replace the original calibration setup, which depended on fishing lines and hooks to position the radioactive particle. The report submitted by Washington University contains a complete description of the new calibration device and its operation. Improvements to the calibration program are also discussed. Iowa State University utilized air-water bubble column simulations in an effort to determine the domain size needed to represent all of the flow scales in a gas-liquid column at a high superficial velocity. Ohio State's report summarizes conclusions drawn from the completion of gas injection phenomena studies, specifically with respect to the characteristics of bubbling-jetting at submerged single orifices in liquid-solid suspensions.

Bernard A. Toseland

2000-12-31T23:59:59.000Z

83

geo column legal.ai  

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

Teapot Dome Teapot Dome Geologic Column Natrona County, Wyoming T 38 & 39 N R 78 W Period Formation L i t h o l o g y T h i c k n e s s D e p t h ( f t ) P r o d u c t i v e Quaternary Alluvium Fox Hills Sandstone Lewis Shale Niobrara Shale Carlisle Shale Mesaverde Group Morrison Mowry Shale Muddy Sandstone Thermopolis Shale Dakota Lakota Goose Egg Tensleep Amsden Madison Undifferentiated Granite Steele Shale Frontier Sundance Chugwater Group Teapot Ss "Pumpkin Buttes shale" Parkman Ss Sussex Ss Shannon Ss 1st Wall Creek 2nd Wall Creek 3rd Wall Creek Upper Lower Crow Mountain Alcova LS Red Peak Outcropping units 195 515 635 1990 2440 3840 3975 4060 4070 4340 4435 4585 4665 4685 5205 5525 5845 6005 6305 7085 3825 3595 3330 3325 3150 3085 2840 2680 0-50 600 100 50 325 470 1355 195 30 290 120 480 160 245 65 240 450 265 230 15 135 85 5 175 80 150 95 270 10 160 320 320 520

84

How to Calculate Molecular Column Density  

E-Print Network [OSTI]

The calculation of the molecular column density from molecular spectral (rotational or ro-vibrational) transition measurements is one of the most basic quantities derived from molecular spectroscopy. Starting from first principles where we describe the basic physics behind the radiative and collisional excitation of molecules and the radiative transfer of their emission, we derive a general expression for the molecular column density. As the calculation of the molecular column density involves a knowledge of the molecular energy level degeneracies, rotational partition functions, dipole moment matrix elements, and line strengths, we include generalized derivations of these molecule-specific quantities. Given that approximations to the column density equation are often useful, we explore the optically thin, optically thick, and low-frequency limits to our derived general molecular column density relation. We also evaluate the limitations of the common assumption that the molecular excitation temperature is con...

Mangum, Jeffrey G

2015-01-01T23:59:59.000Z

85

Oscillating fluid power generator  

SciTech Connect (OSTI)

A system and method for harvesting the kinetic energy of a fluid flow for power generation with a vertically oriented, aerodynamic wing structure comprising one or more airfoil elements pivotably attached to a mast. When activated by the moving fluid stream, the wing structure oscillates back and forth, generating lift first in one direction then in the opposite direction. This oscillating movement is converted to unidirectional rotational movement in order to provide motive power to an electricity generator. Unlike other oscillating devices, this device is designed to harvest the maximum aerodynamic lift forces available for a given oscillation cycle. Because the system is not subjected to the same intense forces and stresses as turbine systems, it can be constructed less expensively, reducing the cost of electricity generation. The system can be grouped in more compact clusters, be less evident in the landscape, and present reduced risk to avian species.

Morris, David C

2014-02-25T23:59:59.000Z

86

Quasivacuum solar neutrino oscillations  

Science Journals Connector (OSTI)

We discuss in detail solar neutrino oscillations with ?m2/E in the range [10-10,10-7]?eV2/MeV. In this range, which interpolates smoothly between the so-called “just-so” and “Mikheyev-Smirnov-Wolfenstein” oscillation regimes, neutrino flavor transitions are increasingly affected by matter effects as ?m2/E increases. As a consequence, the usual vacuum approximation has to be improved through the matter-induced corrections, leading to a “quasivacuum” oscillation regime. We perform accurate numerical calculations of such corrections, using both the true solar density profile and its exponential approximation. Matter effects are shown to be somewhat overestimated in the latter case. We also discuss the role of Earth crossing and of energy smearing. Prescriptions are given to implement the leading corrections in the quasivacuum oscillation range. Finally, the results are applied to a global analysis of solar ? data in a three-flavor framework.

G. L. Fogli; E. Lisi; D. Montanino; A. Palazzo

2000-10-25T23:59:59.000Z

87

Strings and Planck Oscillators  

E-Print Network [OSTI]

We contrast two theories which both start in one dimension at the Planck scale, viz., Quantum SuperString or M-Theory and a theory of Planck oscillations

B. G. Sidharth

2005-12-23T23:59:59.000Z

88

Plastic bottle oscillator as an on-off-type oscillator: Experiments, modeling, and stability analyses of single and coupled systems  

Science Journals Connector (OSTI)

An oscillatory system called a plastic bottle oscillator is studied, in which the downflow of water and upflow of air alternate periodically in an upside-down plastic bottle containing water. It is demonstrated that a coupled two-bottle system exhibits in- and antiphase synchronization according to the nature of coupling. A simple ordinary differential equation is deduced to interpret the characteristics of a single oscillator. This model is also extended to coupled oscillators, and the model reproduces the essential features of the experimental observations.

Masahiro I. Kohira; Hiroyuki Kitahata; Nobuyuki Magome; Kenichi Yoshikawa

2012-02-03T23:59:59.000Z

89

Divided Wall Column Without the Wall  

E-Print Network [OSTI]

popularity in North America due to capital cost benefits and increasing energy conservation awareness. DWC is literally a column with a longitudinal partition inside, separating the pre-frac and the main-frac. The fixed internals, obviously, leave...

Tung, P.

2004-01-01T23:59:59.000Z

90

ARM - Evaluation Product - MFRSR-Column Intensive Properties  

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

Product : MFRSR-Column Intensive Properties The MFRSR-Column Intensive Properties (CIP) value-added product (VAP) has been developed for estimating the microphysical (e.g.,...

91

Combustor oscillation pressure stabilizer  

SciTech Connect (OSTI)

In accordance with the objective of the present invention, the active control of unsteady combustion induced oscillations in a combustion chamber fired by a suitable fuel and oxidizer mixture, such as a hydrocarbon fuel and air mixture, is provided by restructuring and moving the position of the main flame front and thereby increasing the transport time and displacing the pressure wave further away from the in-phase relationship with the periodic heat release. The restructuring and repositioning of the main flame are achieved by utilizing a pilot flame which is pulsed at a predetermined frequency corresponding to less than about one-half the frequency of the combustion oscillation frequency with the duration of each pulse being sufficient to produce adequate secondary thermal energy to restructure the main flame and thereby decouple the heat release from the acoustic coupling so as to lead to a reduction in the dynamic pressure amplitude. The pulsating pilot flame produces a relatively small and intermittently existing flame front in the combustion zone that is separate from the oscillating main flame front but which provides the thermal energy necessary to effectively reposition the location of the oscillating main flame front out of the region in the combustion zone where the acoustic coupling can occur with the main flame and thereby effectively altering the oscillation-causing phase relationship with the heat of combustion.

Gemmen, R.S.; Richards, G.A.; Yip, M.T.J.; Robey, E.; Cully, S.R.; Addis, R.E.

1996-12-31T23:59:59.000Z

92

Brownian parametric oscillators  

Science Journals Connector (OSTI)

We discuss the stochastic dynamics of dissipative, white-noise-driven Floquet oscillators, characterized by a time-periodic stiffness. Thus far, little attention has been paid to these exactly solvable nonstationary systems, although they carry a rich potential for several experimental applications. Here, we calculate and discuss the mean values and variances, as well as the correlation functions and the Floquet spectrum. As one main result, we find for certain parameter values that the fluctuations of the position coordinate are suppressed as compared to the equilibrium value of a harmonic oscillator (parametric squeezing).

Christine Zerbe; Peter Jung; Peter Hänggi

1994-05-01T23:59:59.000Z

93

Bifurcation structure of bubble oscillators  

Science Journals Connector (OSTI)

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

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

1990-01-01T23:59:59.000Z

94

Oscillations in Ionized Gases  

Science Journals Connector (OSTI)

...the mercury arc, the free...to me that electric oscillations...occur, and electric waves may result...low pressure discharges in air with...In a mercury arc or a discharge with a hot...whereas the electric field in accord...

Irving Langmuir

1928-01-01T23:59:59.000Z

95

Damped quantum harmonic oscillator  

E-Print Network [OSTI]

In the framework of the Lindblad theory for open quantum systems the damping of the harmonic oscillator is studied. A generalization of the fundamental constraints on quantum mechanical diffusion coefficients which appear in the master equation for the damped quantum oscillator is presented; the Schr\\"odinger and Heisenberg representations of the Lindblad equation are given explicitly. On the basis of these representations it is shown that various master equations for the damped quantum oscillator used in the literature are particular cases of the Lindblad equation and that the majority of these equations are not satisfying the constraints on quantum mechanical diffusion coefficients. Analytical expressions for the first two moments of coordinate and momentum are also obtained by using the characteristic function of the Lindblad master equation. The master equation is transformed into Fokker-Planck equations for quasiprobability distributions. A comparative study is made for the Glauber $P$ representation, the antinormal ordering $Q$ representation and the Wigner $W$ representation. It is proven that the variances for the damped harmonic oscillator found with these representations are the same. By solving the Fokker-Planck equations in the steady state, it is shown that the quasiprobability distributions are two-dimensional Gaussians with widths determined by the diffusion coefficients. The density matrix is represented via a generating function, which is obtained by solving a time-dependent linear partial differential equation derived from the master equation. Illustrative examples for specific initial conditions of the density matrix are provided.

A. Isar; A. Sandulescu

2006-02-17T23:59:59.000Z

96

Current Status of High Resolution Column Technology for Gas Chromatography  

Science Journals Connector (OSTI)

......work in high-resolution gas-solid chromatography...developments in high- resolution gas chromatographic column...illary or high-resolution gas chromatography. Of these...column material is its high cost compared to glass columns...re sulting from column production, and requires deactivation......

Mary A. Kaiser; Matthew S. Klee

1986-09-01T23:59:59.000Z

97

ARM - Field Campaign - Two-Column Aerosol Project (TCAP)  

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

govCampaignsTwo-Column Aerosol Project (TCAP) govCampaignsTwo-Column Aerosol Project (TCAP) Campaign Links TCAP website Related Campaigns Two-Column Aerosol Project (TCAP): Field Evaluation of Real-time Cloud OD Sensor TWST 2013.04.15, Scott, AMF Two-Column Aerosol Project (TCAP): Winter Aerosol Effects on Cloud Formation 2013.02.04, Cziczo, AMF Two-Column Aerosol Project (TCAP): CU GMAX-DOAS Deployment 2012.07.15, Volkamer, AMF Two-Column Aerosol Project (TCAP): Aerosol Light Extinction Measurements 2012.07.15, Dubey, AMF Two-Column Aerosol Project (TCAP): Aerial Campaign 2012.07.07, Berg, AAF Two-Column Aerosol Project (TCAP): Aerodynamic Particle Sizer 2012.07.01, Berg, AMF Two-Column Aerosol Project (TCAP): KASPRR Engineering Tests 2012.07.01, Mead, AMF Two-Column Aerosol Project (TCAP): Airborne HSRL and RSP Measurements

98

Mass transfer in a wetted wall column  

E-Print Network [OSTI]

and downstream calming sections. (Figure 3 ). After the liquid has transversed the length oi' the column it is disengaged from contact with the gas stream by means of a flared nossle and a collection chamber. Provision is made to measure the temperatures... internal diameter were employed. The equipment was operated so that an annular film of liquid flowed dove the column countercurrent to a stream of gas, The amount of liquid that evaporated into the gas was reassured and then used to calculate a mass...

Platt, Allison M

1950-01-01T23:59:59.000Z

99

Water column dissolution of aragonite in the Pacific Ocean  

Science Journals Connector (OSTI)

... a very small portion of the original smooth surface remains, b, The considerable surface roughening which occurs after extended exposure to highly undersaturated seawater.

Robert H. Byrne; James G. Acker; Peter R. Betzer; Richard A. Feely; Marion H. Cates

1984-11-22T23:59:59.000Z

100

Water column characterization of anchialine caves in Quintana Roo, Mexico  

E-Print Network [OSTI]

) in the brackish, transition, and saline zones of Tunnel A. . . . . . . . . . . . . . . . . 33 Results from the Kruskal-Wallis test with tied ranks testing the null hypothesis (Ho) of no seasonal difference in temperature, salinity, dissolved oxygen, and pH from... of temperature ('C) in the brackish, transition, and saline zones of Dead Zone. . . . . . . . . . . . . . . 44 Table Page Results from the Kruskal-Wallis test with tied ranks testing the null hypothesis (Ho) of no seasonal difference in temperature, salinity...

Dodson, Brett Wayne

2012-06-07T23:59:59.000Z

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


101

The Behaviour of STeel ColumnS in fire Material -Cross-seCtional CapaCity -ColuMn BuCkling  

E-Print Network [OSTI]

The Behaviour of STeel ColumnS in fire Material - Cross-seCtional CapaCity - ColuMn BuIch december 2012 #12;#12;Structural stability and the general behaviour of steel structures can be described during a fire influence the behaviour of steel structures markedly. Significant advances have been made

Giger, Christine

102

Water Quality Modeling Hydraulics and Hydrology Group  

E-Print Network [OSTI]

: ­ Streamflows ­ Lake basin ­ Meteorology (wind/sun/precip...) · Outputs: ­ Vertical Temperature distribution ­ E. Coli · Temperature changes ­ Long term and short term · Lake circulation ­ Lake circulation ­ Outputs: · Oxygen distribution in water column · Nutrient distribution in water column (N

103

BNL | Two-Column Aerosol Program (TCAP)  

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

Two-Column Aerosol Project (TCAP) Two-Column Aerosol Project (TCAP) There remain many key knowledge gaps despite advances in the scientific understanding of how aerosols and clouds evolve and affect climate. Many climatically important processes depend on particles that undergo continuous changes within a size range spanning a few nanometers to a few microns, and with compositions that consist of a variety of carbonaceous materials, soluble inorganic salts and acids and insoluble mineral dust. Primary particles, which are externally-mixed when emitted, are subject to coagulation and chemical changes associated with the condensation of semi-volatile gases to their surface resulting in a spectrum of compositions or mixing-states with a range of climate-affecting optical and hygroscopic properties. The numerical treatments of aerosol transformation

104

Assembly procedure for column cutting platform  

SciTech Connect (OSTI)

This supporting document describes the assembly procedure for the Column Cutting Platform and Elevation Support. The Column Cutting Platform is a component of the 241-SY-101 Equipment Removal System. It is set up on the deck of the Strongback Trailer to provide work access to cut off the upper portion of the Mitigation Pump Assembly (MPA). The Elevation Support provides support for the front of the Storage Container with the Strongback at an inclined position. The upper portion of the MPA must be cut off to install the Containment Caps on the Storage Container. The storage Container must be maintained in an inclined position until the Containment Caps are installed to prevent any residual liquids from migrating forward in the Storage Container.

Routh, R.D.

1995-04-01T23:59:59.000Z

105

Relaxation damping in oscillating contacts  

E-Print Network [OSTI]

If a contact of two purely elastic bodies with no sliding (infinite coefficient of friction) is subjected to superimposed oscillations in the normal and tangential directions, then a specific damping appears, that is not dependent on friction or dissipation in the material. We call this effect "relaxation damping". The rate of energy dissipation due to relaxation damping is calculated in a closed analytic form for arbitrary axially-symmetric contacts. In the case of equal frequency of normal and tangential oscillations, the dissipated energy per cycle is proportional to the square of the amplitude of tangential oscillation and to the absolute value of the amplitude of normal oscillation, and is dependent on the phase shift between both oscillations. In the case of low frequency tangential motion with superimposed high frequency normal oscillations, the system acts as a tunable linear damper. Generalization of the results for macroscopically planar, randomly rough surfaces is discussed.

M. Popov; V. L. Popov; R. Pohrt

2014-10-13T23:59:59.000Z

106

Secondary condenser Cooling water  

E-Print Network [OSTI]

Receiver Secondary condenser LC LC Reboiler TC PC Cooling water PC FCPC Condenser LC XC Throttling valve ¨ mx my l© ª y s § y m «¬ ly my wx l n® ® x np © ¯ Condenser Column Compressor Receiver Super-heater Decanter Secondary condenser Reboiler Throttling valve Expansion valve Cooling water

Skogestad, Sigurd

107

Dynamics and control of a heterogeneous azeotropic distillation column: Conventional control approach  

SciTech Connect (OSTI)

In this work, bifurcation analysis and dynamic simulation were used to investigate the optimum conventional control strategy of an isopropyl alcohol (IPA), cyclohexane (CyH), and water (H{sub 2}O) heterogeneous azeotropic column. Steady-state process analysis shows that the optimal operation point should be located at a critical reflux, a transition point at which the distillation path switches from a route that passes through the IPA + H{sub 2}O azeotrope to one that passes through the IPA + CyH azeotrope. A good control strategy must be able to maintain a steady column temperature profile that shows a plateau near 70 C to ensure passage around the IPA + CyH azeotrope. An inverse double-loop control strategy is proposed based on principal component analysis. This scheme is capable of maintaining the desired column temperature profile given all kinds of feed disturbances, thus keeping the product IPA purity at the desired level.

Chien, I.L. [National Taiwan Univ. of Science and Technology, Taipei (Taiwan, Province of China). Dept. of Chemical Engineering; Wang, C.J.; Wong, D.S.H. [National Tsing Hua Univ., Hsinchu (Taiwan, Province of China). Dept. of Chemical Engineering

1999-02-01T23:59:59.000Z

108

Application of biofiltration system on AOC removal: Column and field studies  

Science Journals Connector (OSTI)

The Cheng-Ching Lake Water Treatment Plant (CCLWTP) is the main supplier of domestic water for the Greater Kaohsiung area, the second largest metropolis in Taiwan. Biological activated carbon (BAC) filtration is one of the major treatment processes in CCLWTP. The objectives of this study were to evaluate the effectiveness of BAC filtration on water treatment in the studied advanced water treatment plant and its capability on pollutants [e.g., AOC (assimilable organic carbon), bromide, bromate, iron] removal. In this study, water samples from each treatment process of CCLWTP were collected and analyzed periodically to assess the variations in concentrations of AOC and other water quality indicators after each treatment unit. Moreover, the efficiency of biofiltration process using granular activated carbon (GAC) and anthracite as the fillers was also evaluated through a column experiment. Results show that the removal efficiencies for AOC, bromide, bromate, and iron are 86% 100%, 17%, and 30% after the BAC filter bed, respectively. This indicates that BAC filtration plays an important role in pollutant removal. Results also show that AOC concentrations in raw water and effluent of the CCLWTP are approximately 143 and 16 ?g acetate-C l?1, respectively. This reveals that the treatment processes applied in CCLWTP is able to remove AOC effectively. Results of column study show that the AOC removal efficiencies in the GAC and anthracite columns are 60% and 17%, respectively. Microbial colonization on GAC and anthracite were detected via the observation of scanning electron microscopic images. The observed microorganisms included bacteria (rods, cocci, and filamentous bacteria), fungi, and protozoa. Results from this study provide us insight into the mechanisms of AOC removal by advanced water treatment processes. These findings would be helpful in designing a modified water treatment system for AOC removal and water quality improvement.

C.C. Chien; C.M. Kao; C.W. Chen; C.D. Dong; C.Y. Wu

2008-01-01T23:59:59.000Z

109

Materialization Strategies in a Column-Oriented DBMS  

E-Print Network [OSTI]

There has been renewed interest in column-oriented database architectures in recent years. For read-mostly query workloads such as those found in data warehouse and decision support applications, ``column-stores'' have ...

Abadi, Daniel J.

2006-11-27T23:59:59.000Z

110

Cross flow cyclonic flotation column for coal and minerals beneficiation  

DOE Patents [OSTI]

An apparatus and process for the separation of coal from pyritic impurities using a modified froth flotation system. The froth flotation column incorporates a helical track about the inner wall of the column in a region intermediate between the top and base of the column. A standard impeller located about the central axis of the column is used to generate a centrifugal force thereby increasing the separation efficiency of coal from the pyritic particles and hydrophillic tailings.

Lai, Ralph W. (Upper St. Clair, PA); Patton, Robert A. (Pittsburgh, PA)

2000-01-01T23:59:59.000Z

111

Nanoscale relaxation oscillator  

DOE Patents [OSTI]

A nanoscale oscillation device is disclosed, wherein two nanoscale droplets are altered in size by mass transport, then contact each other and merge through surface tension. The device may also comprise a channel having an actuator responsive to mechanical oscillation caused by expansion and contraction of the droplets. It further has a structure for delivering atoms between droplets, wherein the droplets are nanoparticles. Provided are a first particle and a second particle on the channel member, both being made of a chargeable material, the second particle contacting the actuator portion; and electrodes connected to the channel member for delivering a potential gradient across the channel and traversing the first and second particles. The particles are spaced apart a specified distance so that atoms from one particle are delivered to the other particle by mass transport in response to the potential (e.g. voltage potential) and the first and second particles are liquid and touch at a predetermined point of growth, thereby causing merging of the second particle into the first particle by surface tension forces and reverse movement of the actuator. In a preferred embodiment, the channel comprises a carbon nanotube and the droplets comprise metal nanoparticles, e.g. indium, which is readily made liquid.

Zettl, Alexander K. (Kensington, CA); Regan, Brian C. (Los Angeles, CA); Aloni, Shaul (Albany, CA)

2009-04-07T23:59:59.000Z

112

Model Predictive Control of a Kaibel Distillation Column  

E-Print Network [OSTI]

Model Predictive Control of a Kaibel Distillation Column Martin Kvernland Ivar Halvorsen Sigurd (e-mail: skoge@ntnu.no) Abstract: This is a simulation study on controlling a Kaibel distillation column with model predictive control (MPC). A Kaibel distillation column has several advantages compared

Skogestad, Sigurd

113

Active constraint regions for optimal operation of distillation columns  

E-Print Network [OSTI]

Active constraint regions for optimal operation of distillation columns Magnus G. Jacobsen the control structure of distillation columns, with optimal operation in mind, it is important to know how for distillation columns change with variations in energy cost and feed flow rate. The production of the most

Skogestad, Sigurd

114

PWR's xenon oscillation control through a fuzzy expert system automatically designed by means of genetic programming  

Science Journals Connector (OSTI)

This work proposes the use of genetic programming (GP) for automatic design of a fuzzy expert system aimed to provide the control of axial xenon oscillations in pressurized water reactors (PWRs). The control methodology is based on three axial offsets ... Keywords: Axial xenon oscillations control, Fuzzy logic, Genetic programming

Roberto P. Domingos; Gustavo H. F. Caldas; Cláudio M. N. A. Pereira; Roberto Schirru

2003-12-01T23:59:59.000Z

115

Neutrino Oscillations Experiments at Fermilab  

E-Print Network [OSTI]

Neutrino oscillations provide an unique opportunity to probe physics beyond the Standard Model. Fermilab is constructing two new neutrino beams to provide a decicive test of two of the recent positive indications for neutrino oscillations: MiniBOONE experiment will settle the LSND controversy, MINOS will provide detailed studies of the region indicated by the SuperK results.

Adam Para

2000-05-01T23:59:59.000Z

116

Coupled second-quantized oscillators  

Science Journals Connector (OSTI)

Second quantization is a powerful technique for describing quantum mechanical processes in which the number of excitations of a single particle is not conserved. A textbook example of second quantization is the presentation of the simple harmonic oscillator in terms of creation and annihilation operators which respectively represent addition or removal of quanta of energy from the oscillator. Our aim in this article is to bolster this textbook example. Accordingly we explore the physics of coupled second-quantized oscillators. These explorations are phrased as exactly solvable eigenvalue problems the mathematical structure providing a framework for the physical understanding. The examples we present can be used to enhance the discussion of second-quantized harmonic oscillators in the classroom to make a connection to the classical physics of coupled oscillators and to acquaint students with systems employed at the frontiers of contemporary physics research.

H. Shi; S. Preble

2013-01-01T23:59:59.000Z

117

Stable local oscillator microcircuit.  

SciTech Connect (OSTI)

This report gives a description of the development of a Stable Local Oscillator (StaLO) Microcircuit. The StaLO accepts a 100MHz input signal and produces output signals at 1.2, 3.3, and 3.6 GHz. The circuit is built as a multi-chip module (MCM), since it makes use of integrated circuit technologies in silicon and lithium niobate as well as discrete passive components. The StaLO uses a comb generator followed by surface acoustic wave (SAW) filters. The comb generator creates a set of harmonic components of the 100MHz input signal. The SAW filters are narrow bandpass filters that are used to select the desired component and reject all others. The resulting circuit has very low sideband power levels and low phase noise (both less than -40dBc) that is limited primarily by the phase noise level of the input signal.

Brocato, Robert Wesley

2006-10-01T23:59:59.000Z

118

Design and Operability of an Energy Integrated Distillation Column  

Science Journals Connector (OSTI)

Abstract Operability issues are investigated on an energy integrated distillation column. The distillation column separates a nearly binary mixture. The energy integration is achieved using an indirect heat pump between the column condenser and the reboiler. The design aim of the integrated is system to enable operation of the distillation column over its entire operating window, through manipulation of the heatpump variables. An additional aim is to provide the operator with a set of standard distillation column actuators, for controlling the distillation column as a conventional distillation column. This secondary aim is attempted achieved, through selection of the control structure of the heat pump. Both simulation and experimental results illustrate areas within the possible operating window where potential operability problems remain dependent upon the selected control configuration. A very large part of the totally possible operating window may be covered by using just one heat pump control structure. However multivariable control avoids singularity of the multiloop structure.

Torben Mønsted Schmidt; Arne Koggersbøl; Sten Bay Jörgensen

1992-01-01T23:59:59.000Z

119

Water vapour, sonoluminescence and sonochemistry  

Science Journals Connector (OSTI)

...data we obtain are for steady-state oscillations, i.e. after the decay of initial...forms of mass di usion. In a helium or xenon bubble in water, thermal and pressure...by the liquid throughout the bubble oscillations. The second mechanism is far less productive...

2000-01-01T23:59:59.000Z

120

Comparison between a spray column and a sieve tray column operating as liquid-liquid heat exchangers  

SciTech Connect (OSTI)

The performance of a spray column and a sieve tray column was compared as a liquid-liquid heat exchanger. In carrying out these studies a 15.2 cm (6.0 in.) diameter column, 183 cm (6.0 ft) tall was utilized. The performance of the spray column as a heat exchanger was shown to correlate with the model of Letan-Kehat which has as a basis that the heat transfer is dominated by the wakeshedding characteristics of the drops over much of the column length. This model defines several hydrodynamic zones along the column of which the wake formation zone at the bottom appears to have the most efficient heat transfer. The column was also operated with four perforated plates spaced two column diameters apart in order to take advantage of the wake formation zone heat transfer. The plates induce coalescence of the dispersed phase and reformation of the drops, and thus cause a repetition of the wake formation zone. It is shown that the overall volumetric heat transfer coefficient in a perforated plate column is increased by a minimum of eleven percent over that in a spray column. A hydrodynamic model that predicts the performance of a perforated plate column is suggested.

Keller, A.; Jacobs, H.R.; Boehm, R.F.

1980-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "oscillating water column" 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

Neutrino Oscillations from String Theory  

E-Print Network [OSTI]

We derive the character of neutrino oscillations that results from a model of equivalence principle violation suggested recently by Damour and Polyakov as a plausible consequence of string theory. In this model neutrino oscillations will take place through interaction with a long range scalar field of gravitational origin even if the neutrinos are degenerate in mass. The energy dependence of the oscillation length is identical to that in the conventional mass mixing mechanism. This possibility further highlghts the independence of and need for more exacting direct neutrino mass measurements together with a next generation of neutrinoless double beta decay experiments.

A. Halprin; C. N. Leung

1997-07-21T23:59:59.000Z

122

Limit cycle analysis of nuclear coupled density-wave oscillations  

SciTech Connect (OSTI)

Recent tests at commercial boiling water reactors (BWRs) have demonstrated the existence of limit cycles for nuclear coupled density-wave oscillations (NCDWOs) at off-normal conditions. This paper presents the application of a simplified nonlinear BWR core model to determine the potential magnitude and limiting mechanisms of severe NCDWOs, and an approximate determination of the limit cycle using singular perturbation analysis. In this model, the point kinetics equation with infinite-delayed approximation and linear reactivity feedback to both fuel temperature and coolant density is used. This model correctly predicts the magnitude of the Vermont Yankee power oscillations.

Ward, M.E.; Lee, J.C.

1986-01-01T23:59:59.000Z

123

How are solar oscillations damped?  

Science Journals Connector (OSTI)

......the universe. How are solar oscilla Acoustic oscillations...outer regions of the solar convection zone. (Image courtesy of SOHO, a project of international co...Damping mechanisms In solar-type stars the energy transport in the outer......

Guenter Houdek; Bill Chaplin; Yvonne Elsworth

1998-08-01T23:59:59.000Z

124

Concentration oscillations and efficiency: glycolysis  

Science Journals Connector (OSTI)

...partitioning of the total free energy decrease, we postulate...Concentration Oscillations and Efficiency: Glycolysis Abstract...the point of view of efficiency offree energy conversion. It is suggested...the adenosine phosphate pool: the PFK reaction at...

PH Richter; J Ross

1981-02-13T23:59:59.000Z

125

Neutralino oscillations at the LHC  

Science Journals Connector (OSTI)

We study a supersymmetric phenomenon that can give spectacular signals at the LHC: oscillations of neutralinos. Such oscillations can be naturally realized in R-symmetric models, where additional fields are introduced as Dirac mass partners of gauginos and Higgsinos. Majorana masses for gauginos, necessarily generated from anomaly mediation, can create tiny mass splittings between degenerate mass eigenstates, causing states produced at the LHC to oscillate between neutralinos and their Dirac partner fields. Scenarios where such states decay with displaced vertices can lead to striking signatures at the LHC, where the oscillation can be visible directly in the distribution of displaced vertex lengths. We elaborate on the theory and LHC phenomenology of this feature within a specific scenario of a Higgsino decaying with a displaced vertex into a gravitino and a Z boson.

Yuval Grossman; Bibhushan Shakya; Yuhsin Tsai

2013-08-30T23:59:59.000Z

126

Results from Neutrino Oscillations Experiments  

SciTech Connect (OSTI)

The interpretation of the results of early solar and atmospheric neutrino experiments in terms of neutrino oscillations has been verified by several recent experiments using both, natural and man-made sources. The observations provide compelling evidence in favor of the existence of neutrino masses and mixings. These proceedings give a general description of the results from neutrino oscillation experiments, the current status of the field, and some possible future developments.

Aguilar-Arevalo, Alexis [Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Apartado Postal 70-543, Mexico, D.F., 04510 (Mexico)

2010-09-10T23:59:59.000Z

127

Signal amplification by unidirectional coupling of oscillators  

E-Print Network [OSTI]

We report our investigation on the input signal amplification in unidirectionally coupled monostable Duffing oscillators in one- and two-dimensions with first oscillator alone driven by a weak periodic signal. Applying a perturbation theory we obtain a set of nonlinear equations for the response amplitude of the coupled oscillators. We identify the conditions for undamped signal propagation with enhanced amplitude through the coupled oscillators. When the number of oscillators increases the response amplitude approaches a limiting value. We determine this limiting value. Also, we analyse the signal amplification in the coupled oscillators in two-dimensions with fraction of oscillators chosen randomly for coupling and forcing.

S. Rajamani; S. Rajasekar

2014-04-22T23:59:59.000Z

128

IMPROVED PRUNING IN COLUMN GENERATION OF A VEHICLE ROUTING PROBLEM  

E-Print Network [OSTI]

column generation, shadow price model 1. Introduction The German automobile club ADAC (Allgemeiner Deutscher Automobil- Club) maintains a heterogeneous fleet of service vehicles in order to assist people

Krumke, Sven O.

129

Design of Earthquake Resistant Bridges Using Rocking Columns  

E-Print Network [OSTI]

Self-Compacting Concrete being2.2.2 Self-Compacting Concrete . . . . . 2.3 Bridge ColumnsBRIDGE CONSTRUCTION Self-Compacting Concrete The mechanical

Barthes, Clement Benjamin

2012-01-01T23:59:59.000Z

130

The Two-Column Aerosol Project Definitions TCAP Educational  

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

What's the big deal about aerosols? The Two-Column Aerosol Project Definitions TCAP Educational Outreach Activity About ARM: The Atmospheric Radiation Measurement (ARM) Climate...

131

Level: National Data; Row: NAICS Codes; Column: Energy Sources...  

Gasoline and Diesel Fuel Update (EIA)

9 Number of Establishments with Capability to Switch Distillate Fuel Oil to Alternative Energy Sources, 2006; Level: National Data; Row: NAICS Codes; Column: Energy Sources; Unit:...

132

Level: National Data; Row: NAICS Codes; Column: Energy Sources...  

Gasoline and Diesel Fuel Update (EIA)

3 Number of Establishments with Capability to Switch LPG to Alternative Energy Sources, 2010; Level: National Data; Row: NAICS Codes; Column: Energy Sources; Unit: Establishment...

133

Level: National Data; Row: NAICS Codes; Column: Energy Sources...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

3 Number of Establishments with Capability to Switch Natural Gas to Alternative Energy Sources, 2010; Level: National Data; Row: NAICS Codes; Column: Energy Sources; Unit:...

134

Level: National Data; Row: NAICS Codes; Column: Energy Sources...  

Gasoline and Diesel Fuel Update (EIA)

0.5 Number of Establishments with Capability to Switch Residual Fuel Oil to Alternative Energy Sources, 2010; Level: National Data; Row: NAICS Codes; Column: Energy Sources; Unit:...

135

Level: National Data; Row: NAICS Codes; Column: Energy Sources...  

Gasoline and Diesel Fuel Update (EIA)

3 Number of Establishments with Capability to Switch LPG to Alternative Energy Sources, 2006; Level: National Data; Row: NAICS Codes; Column: Energy Sources; Unit: Establishment...

136

Level: National Data; Row: NAICS Codes; Column: Energy Sources...  

U.S. Energy Information Administration (EIA) Indexed Site

1 Number of Establishments with Capability to Switch Coal to Alternative Energy Sources, 2006; Level: National Data; Row: NAICS Codes; Column: Energy Sources; Unit: Establishment...

137

Level: National Data; Row: NAICS Codes; Column: Energy Sources...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

3 Number of Establishments with Capability to Switch Natural Gas to Alternative Energy Sources, 2006; Level: National Data; Row: NAICS Codes; Column: Energy Sources; Unit:...

138

Level: National Data; Row: NAICS Codes; Column: Energy Sources...  

Gasoline and Diesel Fuel Update (EIA)

5 Number of Establishments with Capability to Switch Residual Fuel Oil to Alternative Energy Sources, 2006; Level: National Data; Row: NAICS Codes; Column: Energy Sources; Unit:...

139

Level: National Data; Row: NAICS Codes; Column: Energy Sources...  

Gasoline and Diesel Fuel Update (EIA)

7 Number of Establishments with Capability to Switch Electricity to Alternative Energy Sources, 2010; Level: National Data; Row: NAICS Codes; Column: Energy Sources; Unit:...

140

Level: National Data; Row: NAICS Codes; Column: Energy Sources...  

Gasoline and Diesel Fuel Update (EIA)

1 Number of Establishments with Capability to Switch Coal to Alternative Energy Sources, 2010; Level: National Data; Row: NAICS Codes; Column: Energy Sources; Unit: Establishment...

Note: This page contains sample records for the topic "oscillating water column" 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

Level: National Data; Row: NAICS Codes; Column: Energy Sources...  

U.S. Energy Information Administration (EIA) Indexed Site

9 Number of Establishments with Capability to Switch Distillate Fuel Oil to Alternative Energy Sources, 2010; Level: National Data; Row: NAICS Codes; Column: Energy Sources; Unit:...

142

Level: National Data; Row: NAICS Codes; Column: Energy Sources...  

Gasoline and Diesel Fuel Update (EIA)

7 Number of Establishments with Capability to Switch Electricity to Alternative Energy Sources, 2006; Level: National Data; Row: NAICS Codes; Column: Energy Sources; Unit:...

143

DOE/SC0001389 Final technical report: Investigation of uranium attenuation and release at column and pore scales in response to advective geochemical gradients  

SciTech Connect (OSTI)

Experimental approach Column experiments were devised to investigate the role of changing fluid composition on mobility of uranium through a sequence of geologic media. Fluids and media were chosen to be relevant to the ground water plume emanating from the former S-3 ponds at the Oak Ridge Integrated Field Research Challenge (ORIFC) site. Synthetic ground waters were pumped upwards at 0.05 mL/minute for 21 days through layers of quartz sand alternating with layers of uncontaminated soil, quartz sand mixed with illite, quartz sand coated with iron oxides, and another soil layer. Increases in pH or concentration of phosphate, bicarbonate, or acetate were imposed on the influent solutions after each 7 pore volumes while uranium (as uranyl) remained constant at 0.1mM. A control column maintained the original synthetic groundwater composition with 0.1mM U. Pore water solutions were extracted to assess U retention and release in relation to the advective ligand or pH gradients. Following the column experiments, subsamples from each layer were characterized using microbeam X-ray absorption spectroscopy (XANES) in conjunction with X-ray fluorescence mapping and compared to sediment core samples from the ORIFC, at SSRL Beam Line 2-3. Results U retention of 55 â?? 67 mg occurred in phosphate >pH >control >acetate >carbonate columns. The mass of U retained in the first-encountered quartz layer in all columns was highest and increased throughout the experiment. The rate of increase in acetate- and bicarbonate-bearing columns declined after ligand concentrations were raised. U also accumulated in the first soil layer; the pH-varied column retained most, followed by the increasing-bicarbonate column. The mass of U retained in the upper layers was far lower. Speciation of U, interpreted from microbeam XANES spectra and XRF maps, varied within and among the columns. Evidence of minor reduction to U(IV) was observed in the first-encountered quartz layer in the phosphate, bicarbonate, and pH columns while only U(VI) was observed in the control and acetate columns. In the soil layer, the acetate and bicarbonate columns both indicate minor reduction to U(IV), but U(VI) predominated in all columns. In the ORIFC soils, U was consistently present as U(VI); sorption appears to be the main mechanism of association for U present with Fe and/or Mn, while U occurring with P appears in discrete particles consistent with a U mineral phase. U in soil locations with no other elemental associations shown by XRF are likely uranium oxide phases.

Savage, Kaye S. [Wofford College; Zhu, Wenyi [Wofford College; Barnett, Mark O. [Auburn University

2013-05-13T23:59:59.000Z

144

Correlate the flooding of packed columns a new way  

SciTech Connect (OSTI)

Packed-column pressure-drop and flooding-point prediction has received new attention recently. These publications, like most earlier ones, focus on gas-flow-induced pressure drop, and flooding due to liquid entrainment in the packing. A few years ago, some problems occurred when packing was applied in high-pressure distillation service, such as ethylene and propylene superfractionators. Apparently, the maximum liquid-through-put capacity was lower than predicted from the gas-flow-induced flooding correlations. Such situation exists when predicting the performance of valve trays in similar service: liquid downflow can be limiting before entrainment flooding occurs. The reason for this behavior is the relatively low liquid and high vapor density of these high-pressure services. The liquid/vapor density ratios are typically 10--15:1 for such hydrocarbon systems. In contrast, for low-pressure water/air systems, this ratio is in the range 300--800:1. A large amount of experimental data for low-pressure systems has been used to correlate pressure drop and flooding, but it doesn't cover the technically important region of low liquid and high vapor density. This Article suggests an approach for understanding such liquid-limited systems.

Kaiser, V.

1994-06-01T23:59:59.000Z

145

The Book Review Column1 by William Gasarch  

E-Print Network [OSTI]

The Book Review Column1 by William Gasarch Department of Computer Science University of Maryland at College Park College Park, MD, 20742 email: gasarch@cs.umd.edu In this column we review the following books. 1. Excellence Without a Soul: How a Great University Forgot Education by Harry Lewis. Review

Gasarch, William Ian

146

The Book Review Column1 by William Gasarch  

E-Print Network [OSTI]

The Book Review Column1 by William Gasarch Department of Computer Science University of Maryland at College Park College Park, MD, 20742 email: gasarch@cs.umd.edu In this column we review the following books. 1. Symbolic Asymptotics by John R. Shackell. Review by James C. Beaumont. Given two functions f

Gasarch, William Ian

147

THERMAL MODELING OF ION EXCHANGE COLUMNS WITH SPHERICAL RF RESIN  

SciTech Connect (OSTI)

Models have been developed to simulate the thermal performance of RF columns fully loaded with radioactive cesium. Temperature distributions and maximum temperatures across the column were calculated during Small Column Ion Exchange (SCIX) process upset conditions with a focus on implementation at Hanford. A two-dimensional computational modeling approach was taken to include conservative, bounding estimates for key parameters such that the results will provide the maximum centerline temperatures achievable under the design configurations using a feed composition known to promote high cesium loading on RF. The current full-scale design for the SCIX system includes a central cooling tube, and one objective of these calculations was to examine its elimination to simplify the design. Results confirmed that a column design without a central cooling tube is feasible for RF, allowing for the possibility of significant design simplifications if it can be assumed that the columns are always filled with liquid. With active cooling through the four outer tubes, the maximum column diameter expected to maintain the temperature below the assumed media and safety limits is 26 inches, which is comparable to the current design diameter. Additional analysis was conducted to predict the maximum column temperatures for the previously unevaluated accident scenario involving inadvertent drainage of liquid from a cesium-saturated column, with retention of the ion exchange media and cesium in the column. As expected, much higher maximum temperatures are observed in this case due to the poor heat transfer properties of air versus liquid. For this hypothetical accident scenario involving inadvertent and complete drainage of liquid from a cesium-saturated column, the modeling results indicate that the maximum temperature within a 28 inch diameter RF column with external cooling is expected to exceed 250 C within 2 days, while the maximum temperature of a 12 inch column is maintained below 100 C. In addition, the calculation results demonstrate that the cooling tube system external to an air-filled column is not highly effective at reducing the maximum temperature, but the baseline design using a central cooling tube inside the column provides sufficient cooling to maintain the maximum temperature near the assumed safety limit.

Lee, S.; King, W.

2009-12-30T23:59:59.000Z

148

Magnetically insulated transmission line oscillator  

DOE Patents [OSTI]

A magnetically insulated transmission line oscillator employs self-generated magnetic fields to generate microwave energy. An anode of the oscillator includes slow-wave structures which are formed of a plurality of thin conductive vanes defining cavities therebetween, and a gap is formed between the anode and a cathode of the oscillator. In response to a pulsed voltage applied to the anode and cathode, self-generated magnetic fields arfe produced in a cross-field orientation with respect to the orientation of the electric field between the anode and the cathode. The cross-field magnetic fields insulate the flow of electrons in the gap and confine the flow of electrons within the gap.

Bacon, Larry D. (Albuquerque, NM); Ballard, William P. (Albuquerque, NM); Clark, M. Collins (Albuquerque, NM); Marder, Barry M. (Albuquerque, NM)

1988-01-01T23:59:59.000Z

149

Atomic-binding-energy oscillations  

Science Journals Connector (OSTI)

We investigate the oscillatory supplement to the statistical nonrelativistic binding-energy formula for neutral atoms. The semiclassical approach proves capable of deriving these oscillations. It turns out that their amplitude is proportional to Z4/3 (Z is the number of electrons), and that their period is determined by the maximum angular momentum available in Thomas-Fermi atoms, i.e., 0.928Z1/3. Our calculation also provides an understanding of the peculiar shape of the oscillations, which show sharp minima and wide, structured maxima.

Berthold-Georg Englert and Julian Schwinger

1985-07-01T23:59:59.000Z

150

Neutrino Oscillations in 1. The Study of Neutrino Oscillations  

E-Print Network [OSTI]

... Currently there are three oscillation signal regions: #15; LSND #23; e ! #23; #22; ,#23; e ! #23; #22; separately #15; Atmospheric Neutrinos #23; #22; + #23; #22; disappearance #15; Solar Neutrinos #23; e is combination of two e#11;ects Proposed Matrixes for Neutrino Mixing (#23; 1 ; #23; 2 ; #23; 3 ) = M(#23; e

151

The response of rigid plates to blast in deep water: fluid–structure interaction experiments  

Science Journals Connector (OSTI)

...speed of sound of water, respectively...is dictated by conservation of linear momentum...creating an extending pool of cavitated water. In figure-6...radiated into the water column in contact...Now write conservation of linear momentum...

2012-01-01T23:59:59.000Z

152

Experimental study on vortex-induced motions of a semi-submersible platform with four square columns, Part I: Effects of current incidence angle and hull appendages  

Science Journals Connector (OSTI)

An experimental study on Vortex-Induced Motion (VIM) of the semi-submersible platform concept with four square columns is presented. Model tests were carried out to check the influence of different headings and hull appendages (riser supports located at the pontoons; fairleads and the mooring stretches located vertically at the external column faces; and hard pipes located vertically at the internal column faces). The results comprise in-line, transverse and yaw motions, as well as combined motions in the XY plane, drag and lift forces and spectral analysis. The main results showed that VIM in the transverse direction occurred in a range of reduced velocity 4.0 up to 14.0 with amplitude peaks around reduced velocities around 7.0 and 8.0. The largest transverse amplitudes obtained were around 40% of the column width for 30° and 45° incidences. Another important result observed was a considerable yaw motion oscillation, in which a synchronization region could be identified as a resonance phenomenon. The largest yaw motions were verified for the 0° incidence and the maxima amplitudes around 4.5°. The hull appendages located at columns had the greatest influence on the VIM response of the semi-submersible.

Rodolfo T. Gonçalves; Guilherme F. Rosetti; André L.C. Fujarra; Allan C. Oliveira

2012-01-01T23:59:59.000Z

153

Stable sonoluminescence within a water hammer tube  

Science Journals Connector (OSTI)

The sonoluminescence (SL) from the collapse of a single gas bubble within a liquid can be produced repetitively using an acoustic resonator. An alternative technique using a water hammer tube, producing SL from bubbles of greater size, is described here. A sealed vertical tube partly filled with a liquid and a gas at low pressure is subjected to vertical vibrations. The oscillation of the pressure within the liquid column, due to inertial forces, excites cavitation bubbles to grow and collapse. Rotation is used to confine the bubbles to the axis of the tube. Bright SL emissions were observed in a number of liquids. Repetitive emission was produced from bubbles in condensed phosphoric acid. Bubbles of 0.4mm ambient radius (containing 2×1014 xenon atoms) were excited by vibration at 35Hz. Approximately 1012 photons were emitted per collapse in the range 400–700nm (over four orders of magnitude greater than the brightest SL reported previously), corresponding to a 1% efficiency of the conversion of mechanical energy into light.

Avik Chakravarty; Theo Georghiou; Tacye E. Phillipson; Alan J. Walton

2004-06-24T23:59:59.000Z

154

Xenon Oscillations in a VVÉR-1000 Core  

Science Journals Connector (OSTI)

Xenon oscillations – periodic redistribution of the power over ... the large size of this core. The xenon oscillations can be conventionally divided into axial, radial ... paper, methods are described for initiat...

V. A. Tereshonok; V. S. Stepanov; V. P. Povarov; O. V. Lebedev…

2002-10-01T23:59:59.000Z

155

Cheap and easy coupled-oscillations demonstration  

Science Journals Connector (OSTI)

A suspended magnetic dipole undergoes torsional oscillations in the Earth’s magnetic field. The length of the suspending string is adjusted so that the pendulum periods equals that for torsional oscillations and energy exchange between these modes is observed.

Charles A. Sawicki

1998-01-01T23:59:59.000Z

156

SENSITIVITY ANALYSIS FOR SALTSTONE DISPOSAL UNIT COLUMN DEGRADATION ANALYSES  

SciTech Connect (OSTI)

PORFLOW related analyses supporting a Sensitivity Analysis for Saltstone Disposal Unit (SDU) column degradation were performed. Previous analyses, Flach and Taylor 2014, used a model in which the SDU columns degraded in a piecewise manner from the top and bottom simultaneously. The current analyses employs a model in which all pieces of the column degrade at the same time. Information was extracted from the analyses which may be useful in determining the distribution of Tc-99 in the various SDUs throughout time and in determining flow balances for the SDUs.

Flach, G.

2014-10-28T23:59:59.000Z

157

MODELING AND SIMULATION OF SOLID FLUIDIZATION IN A RESIN COLUMN  

SciTech Connect (OSTI)

The objective of the present work is to model the resin particles within the column during fluidization and sedimentation processes using computation fluid dynamics (CFD) approach. The calculated results will help interpret experimental results, and they will assist in providing guidance on specific details of testing design and establishing a basic understanding of particle’s hydraulic characteristics within the column. The model is benchmarked against the literature data and the test data (2003) conducted at Savannah River Site (SRS). The paper presents the benchmarking results and the modeling predictions of the SRS resin column using the improved literature correlations applicable for liquid-solid granular flow.

Lee, S.

2014-06-24T23:59:59.000Z

158

Improved direct and indirect systems of columns for ternary distillation  

SciTech Connect (OSTI)

Separation of a ternary mixture into almost pure components is discussed. Systems of distillation columns, with higher thermodynamic efficiency, are developed from a direct sequence (or indirect sequence) of distillation columns by allowing for two interconnecting streams of the same composition and different enthalpy. This increases the reversibility of distillation in the second column, which results in replacing a portion of the high-temperature boiling duty with a lower-temperature heat in the direct split case. For the indirect split case, the improvement allows a portion of the low-temperature condensing duty to be replaced with a higher-temperature condensation.

Agrawal, R.; Fidkowski, Z.T. [Air Products and Chemicals, Inc., Allentown, PA (United States)] [Air Products and Chemicals, Inc., Allentown, PA (United States)

1998-04-01T23:59:59.000Z

159

Observational aspects of sunspot oscillations  

Science Journals Connector (OSTI)

...oscillations in the solar plasma organized by Robert...National Center for Atmospheric ResearchBoulder...interplay between the thermal atmospheric stratification...conditions in the solar plasma, e.g. the velocity...CO, CaH) and non-ionized metals...

2006-01-01T23:59:59.000Z

160

Lepton textures and neutrino oscillations  

E-Print Network [OSTI]

Systematic analyses of the textures arising in lepton mass matrices have been carried out using unitary transformations and condition of naturalness for the Dirac and Majorana neutrino possibilities. It is observed that the recent three neutrino oscillation data together with the effective mass in neutrinoless double beta decay provide vital clues in predicting the general structures of these lepton mass matrices.

Verma, Rohit

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "oscillating water column" 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

Silicon crystal growing by oscillating crucible technique  

DOE Patents [OSTI]

A process for growing silicon crystals from a molten melt comprising oscillating the container during crystal growth is disclosed.

Schwuttke, G.H.; Kim, K.M.; Smetana, P.

1983-08-03T23:59:59.000Z

162

Free-Oscillations Coincident with Earthquakes  

E-Print Network [OSTI]

Two de-modulation algorithms are used to observe free-oscillations of the earth that are coincident with earthquakes.

Randall D. Peters

2010-10-27T23:59:59.000Z

163

Oscillations of cytosolic sodium during calcium oscillations in exocrine acinar cells  

Science Journals Connector (OSTI)

...individuals 20-or within doublets or "strings" of cells consisting 10--ofup to...Na+]i oscillations are a result of oscillating [Ca2+]i. The [Na+]i in unstimulated...Na+]i oscillations, we exposed oscillating cells to ouabain, a specific inhibitor...

MM Wong; JK Foskett

1991-11-15T23:59:59.000Z

164

Pathogenic Human Viruses in Coastal Waters  

Science Journals Connector (OSTI)

...of viruses is heat stable and more...excreted into the water column by mammals...disease after swimming at polluted beaches...caliciviruses in marine water maintained at...with municipal water system. J...associated with swimming in a pool and secondary...

Dale W. Griffin; Kim A. Donaldson; John H. Paul; Joan B. Rose

2003-01-01T23:59:59.000Z

165

14 Modelling Ca2+ Oscillations in Plants  

E-Print Network [OSTI]

14 Modelling Ca2+ Oscillations in Plants GERALD SCHÃ?NKNECHT*1 AND CLAUDIA BAUER2 Abstract To interpret the physiological functions of Ca2+ oscillations in plants cells, one has to understand how Ca2 predict how a certain stimulus might affect the frequency or amplitude of a Ca2+ oscillation. Usually

Schönknecht, Gerald

166

ARM - Field Campaign - Summer Single Column Model IOP  

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

govCampaignsSummer Single Column Model IOP govCampaignsSummer Single Column Model IOP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Summer Single Column Model IOP 1997.06.18 - 1997.07.18 Lead Scientist : David Randall Data Availability Actual data files for a number of past SCM IOPs are available from the ARM Archive IOP Server Cloud and Radiation Products Derived from Satellite Data Colorado State's Single Column Modeling Home Page For data sets, see below. Summary During the IOP, 1180 sondes were launched, with 4 missing data due to weather related problems and 24 terminating before 10,000 m (10 km). Description The Summer 1997 SCM IOP was scheduled with the SGP97 Campaign. With additional NASA funding, the IOP was extended so that the total IOP covered

167

ARM - Field Campaign - Winter Single Column Model IOP  

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

govCampaignsWinter Single Column Model IOP govCampaignsWinter Single Column Model IOP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Winter Single Column Model IOP 1999.01.19 - 1999.02.08 Lead Scientist : David Randall Data Availability Actual data files for a number of past SCM IOPs are available from the ARM Archive under IOPs/UAV. Cloud and Radiation Products Derived from Satellite Data Colorado State's Single Column Modeling Home Page For data sets, see below. Description A second winter SCM IOP was conducted (1/19 - 2/8/99) to provide additional sampling of winter weather conditions. This was the first SCM IOP where AERIs and ceilometers were installed at the boundary facilities to give retrievals of temperature and moisture to supplement the sounding data. A

168

ARM - Publications: Science Team Meeting Documents: Ensemble Single Column  

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

Ensemble Single Column Modelling (ESCM) in the Tropical Western Pacific Ensemble Single Column Modelling (ESCM) in the Tropical Western Pacific Hume, Timothy Bureau of Meteorology Research Centre Jakob, Christian BMRC Single column models (SCMs) are useful tools for the evaluation of parameterisations of radiative and moist processes used in general circulation models. Most SCM studies to date have concentrated on regions where there is a sufficiently dense observational network to derive the required forcing data, such as the Southern Great Plains. This poster describes an ensemble single column modelling (ESCM) approach, where an ensemble of SCM forcing data sets are derived from numerical weather prediction (NWP) analyses. The technique is applied to SCM runs at the Manus Island and Nauru ARM sites in the Tropical Western Pacific (TWP). It

169

ARM - Field Campaign - Two-Column Aerosol Project (TCAP): Ground...  

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

Discovery Browse Data Related Campaigns Two-Column Aerosol Project (TCAP) 2012.07.01, Berg, AMF Comments? We would love to hear from you Send us a note below or call us at...

170

ARM - Field Campaign - Two-Column Aerosol Project (TCAP): Winter...  

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

Discovery Browse Data Related Campaigns Two-Column Aerosol Project (TCAP) 2012.07.01, Berg, AMF Comments? We would love to hear from you Send us a note below or call us at...

171

ARM - Field Campaign - Two-Column Aerosol Project (TCAP): Aerial...  

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

Discovery Browse Data Related Campaigns Two-Column Aerosol Project (TCAP) 2012.07.01, Berg, AMF Comments? We would love to hear from you Send us a note below or call us at...

172

ARM - Field Campaign - Two-Column Aerosol Project (TCAP): Airborne...  

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

Discovery Browse Data Related Campaigns Two-Column Aerosol Project (TCAP) 2012.07.01, Berg, AMF Comments? We would love to hear from you Send us a note below or call us at...

173

Operating Parameters in the Column Flotation of Alabama Oil Shale  

Science Journals Connector (OSTI)

A factionally designed experiment performed in a one meter column flotation cell identified the important factors affecting the flotation of eastern oil shales. These initial tests were performed in a...

C. W. Schultz; John B. Bates

1990-01-01T23:59:59.000Z

174

New developments in the primal-dual column generation technique  

E-Print Network [OSTI]

Jan 24, 2011 ... problem (CSP), the vehicle routing problem with time windows (VRPTW), and the .... Actually, any column with a negative reduced cost can be added to the RMP. ...... OBOE: the Oracle Based Optimization Engine, 2010.

2011-01-24T23:59:59.000Z

175

ARM - Field Campaign - Summer Single Column Model IOP  

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

: Summer Single Column Model IOP 1999.07.12 - 1999.07.22 Lead Scientist : David Randall Data Availability Data Plots from Colorado State University Data Plots from Livermore...

176

ARM - Field Campaign - Spring Single Column Model IOP  

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

: Spring Single Column Model IOP 1999.03.01 - 1999.03.22 Lead Scientist : David Randall Data Availability Actual data files for a number of past SCM IOPs are available from...

177

ARM - Field Campaign - Spring 1995 Single Column Model IOP  

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

: Spring 1995 Single Column Model IOP 1995.04.01 - 1995.04.30 Lead Scientist : David Randall Data Availability Data Plots from Colorado State University Data Plots from Livermore...

178

ARM - Field Campaign - Summer 1995 Single Column Model IOP  

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

: Summer 1995 Single Column Model IOP 1995.07.01 - 1995.07.31 Lead Scientist : David Randall Data Availability Data Plots from Colorado State University Data Plots from Livermore...

179

Treatments of Inhomogeneous Clouds in a GCM Column Radiation...  

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

version of the three- dimensional (3D) CRM described in detail by Khairoutdinov and Randall (2003) into each grid column of a realistic GCM, the NCAR Community Atmosphere Model...

180

ARM - Field Campaign - Fall 1994 Single Column Model IOP  

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

: Fall 1994 Single Column Model IOP 1994.10.01 - 1994.10.31 Lead Scientist : David Randall Data Availability Data Plots from Colorado State University Data Plots from Livermore...

Note: This page contains sample records for the topic "oscillating water column" 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

Practical Application of Distillation Column Energy Control Systems  

E-Print Network [OSTI]

Closed loop computer control of an ethylene column has been shown to save $350/day in improved ethylene recovery and $150/day in reduced energy consumption. These savings are achieved through material balance optimization and energy balance...

Matthews, S. A.

1980-01-01T23:59:59.000Z

182

METHOD TO TEST ISOTOPIC SEPARATION EFFICIENCY OF PALLADIUM PACKED COLUMNS  

SciTech Connect (OSTI)

The isotopic effect of palladium has been applied in different ways to separate hydrogen isotopes for many years. At Savannah River Site palladium deposited on kieselguhr (Pd/k) is used in a thermal cycling absorption process (TCAP) to purify tritium for over ten years. The need to design columns for different throughputs and the desire to advance the performance of TCAP created the need to evaluate different column designs and packing materials for their separation efficiency. In this work, columns with variations in length, diameter and metal foam use, were tested using an isotope displacement method. A simple computer model was also developed to calculate the number of theoretical separation stages using the test results. The effects of column diameter, metal foam and gas flow rate were identified.

Heung, L; Gregory Staack, G; James Klein, J; William Jacobs, W

2007-06-27T23:59:59.000Z

183

Optimization Online - Simultaneous Column-and-Row Generation ...  

E-Print Network [OSTI]

Nov 14, 2010 ... Abstract: In this paper, we develop a simultaneous column-and-row generation algorithm that could be applied to a general class of large-scale ...

Ibrahim Muter

2010-11-14T23:59:59.000Z

184

High Performance Trays and Heat Exchangers in Heat Pumped Distillation Columns  

E-Print Network [OSTI]

AND LIQUID now PATHS fOA IltO TltAYS I A number of engineering contractors and 1 operating companies have employed Union Carbide'\\s High Flux and Multiple Downcomer tray technolog~es to improve performance, decrease utilities and I lower operating costs... ? Fi,?'d as nll\\ximum within hf'l~ht n'!:-;tl'ie-tlon. The control scheme for a heat pump can be de signed to be no more complex than a conventional steam/cooling water system which relies on flow and level controllers to set the various column flow...

Wisz, M. W.; Antonelli, R.; Ragi, E. G.

1981-01-01T23:59:59.000Z

185

Measuring neutrino oscillation parameters using $\  

SciTech Connect (OSTI)

MINOS is a long-baseline neutrino oscillation experiment. It consists of two large steel-scintillator tracking calorimeters. The near detector is situated at Fermilab, close to the production point of the NuMI muon-neutrino beam. The far detector is 735 km away, 716m underground in the Soudan mine, Northern Minnesota. The primary purpose of the MINOS experiment is to make precise measurements of the 'atmospheric' neutrino oscillation parameters ({Delta}m{sub atm}{sup 2} and sin{sup 2} 2{theta}{sub atm}). The oscillation signal consists of an energy-dependent deficit of {nu}{sub {mu}} interactions in the far detector. The near detector is used to characterize the properties of the beam before oscillations develop. The two-detector design allows many potential sources of systematic error in the far detector to be mitigated by the near detector observations. This thesis describes the details of the {nu}{sub {mu}}-disappearance analysis, and presents a new technique to estimate the hadronic energy of neutrino interactions. This estimator achieves a significant improvement in the energy resolution of the neutrino spectrum, and in the sensitivity of the neutrino oscillation fit. The systematic uncertainty on the hadronic energy scale was re-evaluated and found to be comparable to that of the energy estimator previously in use. The best-fit oscillation parameters of the {nu}{sub {mu}}-disappearance analysis, incorporating this new estimator were: {Delta}m{sup 2} = 2.32{sub -0.08}{sup +0.12} x 10{sup -3} eV{sup 2}, sin {sup 2} 2{theta} > 0.90 (90% C.L.). A similar analysis, using data from a period of running where the NuMI beam was operated in a configuration producing a predominantly {bar {nu}}{sub {mu}} beam, yielded somewhat different best-fit parameters {Delta}{bar m}{sup 2} = (3.36{sub -0.40}{sup +0.46}(stat.) {+-} 0.06(syst.)) x 10{sup -3}eV{sup 2}, sin{sup 2} 2{bar {theta}} = 0.86{sub -0.12}{sup _0.11}(stat.) {+-} 0.01(syst.). The tension between these results is intriguing, and additional antineutrino data is currently being taken in order to further investigate this apparent discrepancy.

Backhouse, Christopher James; /Oxford U.

2011-02-01T23:59:59.000Z

186

Combustor oscillating pressure stabilization and method  

DOE Patents [OSTI]

High dynamic pressure oscillations in hydrocarbon-fueled combustors typically occur when the transport time of the fuel to the flame front is at some fraction of the acoustic period. These oscillations are reduced to acceptably lower levels by restructuring or repositioning the flame front in the combustor to increase the transport time. A pilot flame front located upstream of the oscillating flame and pulsed at a selected frequency and duration effectively restructures and repositions the oscillating flame in the combustor to alter the oscillation-causing transport time.

Gemmen, Randall S. (Morgantown, WV); Richards, George A. (Morgantown, WV); Yip, Mui-Tong Joseph (Morgantown, WV); Robey, Edward H. (Westover, WV); Cully, Scott R. (Morgantown, WV); Addis, Richard E. (Smithfield, PA)

1998-01-01T23:59:59.000Z

187

Revised Thermal Analysis of LANL Ion Exchange Column  

SciTech Connect (OSTI)

This document updates a previous calculation of the temperature distributions in a Los Alamos National Laboratory (LANL) ion exchange column.1 LANL operates two laboratory-scale anion exchange columns, in series, to extract Pu-238 from nitric acid solutions. The Defense Nuclear Facilities Safety Board has requested an updated analysis to calculate maximum temperatures for higher resin loading capacities obtained with a new formulation of the Reillex HPQ anion exchange resin. The increased resin loading capacity will not exceed 118 g plutonium per L of resin bed. Calculations were requested for normal operation of the resin bed at the minimum allowable solution feed rate of 30 mL/min and after an interruption of flow at the end of the feed stage, when one of the columns is fully loaded. The object of the analysis is to demonstrate that the decay heat from the Pu-238 will not cause resin bed temperatures to increase to a level where the resin significantly degrades. At low temperatures, resin bed temperatures increase primarily due to decay heat. At {approx}70 C a Low Temperature Exotherm (LTE) resulting from the reaction between 8-12 M HNO{sub 3} and the resin has been observed. The LTE has been attributed to an irreversible oxidation of pendant ethyl benzene groups at the termini of the resin polymer chains by nitric acid. The ethyl benzene groups are converted to benzoic acid moities. The resin can be treated to permanently remove the LTE by heating a resin suspension in 8M HNO{sub 3} for 30-45 minutes. No degradation of the resin performance is observed after the LTE removal treatment. In fact, heating the resin in boiling ({approx}115-120 C) 12 M HNO{sub 3} for 3 hr displays thermal stability analogous to resin that has been treated to remove the LTE. The analysis is based on a previous study of the SRS Frames Waste Recovery (FWR) column, performed in support of the Pu-238 production campaign for NASA's Cassini mission. In that study, temperature transients following an interruption of flow to the column were calculated. The transient calculations were terminated after the maximum resin bed temperature reached the Technical Standard of 60 C, which was set to prevent significant resin degradation. The LANL column differs from the FWR column in that it has a significantly smaller radius, 3.73 cm nominal versus approximately 28 cm. It follows that natural convection removes heat much more effectively from the LANL column, so that the column may reach thermal equilibrium. Consequently, the calculations for a flow interruption were extended until an approach to thermal equilibrium was observed. The LANL ion exchange process also uses a different resin than was used in the FWR column. The LANL column uses Reillex HPQ{trademark} resin, which is more resistant to attack by nitric acid than the Ionac 641{trademark} resin used in the FWR column. Heat generation from the resin oxidation reaction with nitric acid is neglected in this analysis since LANL will be treating the resin to remove the LTE prior to loading the resin in the columns. Calculations were performed using a finite difference computer code, which incorporates models for absorption and elution of plutonium and for forced and natural convection within the resin bed. Calculations for normal column operation during loading were performed using an initial temperature and a feed temperature equal to the ambient air temperature. The model for the normal flow calculations did not include natural convection within the resin bed. The no flow calculations were started with the temperature and concentration profiles at the end of the loading stage, when there would be a maximum amount of plutonium either adsorbed on the resin or in the feed solution in the column.

Laurinat, J

2006-04-11T23:59:59.000Z

188

E-Print Network 3.0 - azeotropic distillation columns Sample...  

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

closed (total reflux) operation of the conventional batch distillation column with a condenser... in closed middle vessel batch distillation column (solid ... Source: Skogestad,...

189

Quantum dynamics of the damped harmonic oscillator  

E-Print Network [OSTI]

The quantum theory of the damped harmonic oscillator has been a subject of continual investigation since the 1930s. The obstacle to quantization created by the dissipation of energy is usually dealt with by including a discrete set of additional harmonic oscillators as a reservoir. But a discrete reservoir cannot directly yield dynamics such as Ohmic damping (proportional to velocity) of the oscillator of interest. By using a continuum of oscillators as a reservoir, we canonically quantize the harmonic oscillator with Ohmic damping and also with general damping behaviour. The dynamics of a damped oscillator is determined by an arbitrary effective susceptibility that obeys Kramers-Kronig relations. This approach offers an alternative description of nano-mechanical oscillators and opto-mechanical systems.

T. G. Philbin

2012-05-11T23:59:59.000Z

190

Quantum dynamics of the damped harmonic oscillator  

E-Print Network [OSTI]

The quantum theory of the damped harmonic oscillator has been a subject of continual investigation since the 1930s. The obstacle to quantization created by the dissipation of energy is usually dealt with by including a discrete set of additional harmonic oscillators as a reservoir. But a discrete reservoir cannot directly yield dynamics such as Ohmic damping (proportional to velocity) of the oscillator of interest. By using a continuum of oscillators as a reservoir, we canonically quantize the harmonic oscillator with Ohmic damping and also with general damping behaviour. The dynamics of a damped oscillator is determined by an arbitrary effective susceptibility that obeys Kramers-Kronig relations. This approach offers an alternative description of nano-mechanical oscillators and opto-mechanical systems.

Philbin, T G

2012-01-01T23:59:59.000Z

191

An axial xenon oscillation model  

Science Journals Connector (OSTI)

A two-point xenon oscillation model was developed for PWRs. The model employs the nonlinear xenon and iodine balance equations and the one group, one-dimensional neutron diffusion equation having nonlinear power reactivity feedback. A two-term spatial harmonic series solution was assumed for the flux, xenon and iodine distributions. The system was made as close to critical as possible with the assumed distributions using a variational principle. The xenon and iodine concentrations were then obtained from their governing differential equations. The input/output nature of the model makes it ideal for simulation of xenon-induced reactor transients. A comparison of the simulated plant to actual plant data was made. The period of oscillation, stability index and flux amplitude of the simulated plant were all found to match the actual plant data with less than 10% error.

R.J. Onega; R.A. Kisner

1978-01-01T23:59:59.000Z

192

Graphene, neutrino mass and oscillation  

E-Print Network [OSTI]

A resolution of the Abraham-Minkowski dilemma is presented that other constant velocities can play the role of c in the theory of relativity. For example, in 2005 electrons of graphene were discovered to behave as if the coefficient is a Fermi velocity. Then we propose a conjecture for neutrinos to avoid the contradiction among two-component theory, negative rest mass-square and oscillation.

Z. Y. Wang

2009-09-10T23:59:59.000Z

193

Coherence effects in neutrino oscillations  

Science Journals Connector (OSTI)

We study the effect of coherent and incoherent broadening on neutrino oscillations both in vacuum and in the presence of matter (the MSW effect). We show under very general assumptions that it is not possible to distinguish experimentally neutrinos produced in some region of space as wave packets from those produced in the same region of space as plane waves with the same energy distribution. © 1995 The American Physical Society.

Ken Kiers; Shmuel Nussinov; Nathan Weiss

1996-01-01T23:59:59.000Z

194

Micro-machined resonator oscillator  

DOE Patents [OSTI]

A micro-miniature resonator-oscillator is disclosed. Due to the miniaturization of the resonator-oscillator, oscillation frequencies of one MHz and higher are utilized. A thickness-mode quartz resonator housed in a micro-machined silicon package and operated as a telemetered sensor beacon'' that is, a digital, self-powered, remote, parameter measuring-transmitter in the FM-band. The resonator design uses trapped energy principles and temperature dependence methodology through crystal orientation control, with operation in the 20--100 MHz range. High volume batch-processing manufacturing is utilized, with package and resonator assembly at the wafer level. Unique design features include squeeze-film damping for robust vibration and shock performance, capacitive coupling through micro-machined diaphragms allowing resonator excitation at the package exterior, circuit integration and extremely small (0.1 in. square) dimensioning. A family of micro-miniature sensor beacons is also disclosed with widespread applications as bio-medical sensors, vehicle status monitors and high-volume animal identification and health sensors. The sensor family allows measurement of temperatures, chemicals, acceleration and pressure. A microphone and clock realization is also available. 21 figs.

Koehler, D.R.; Sniegowski, J.J.; Bivens, H.M.; Wessendorf, K.O.

1994-08-16T23:59:59.000Z

195

Micro-machined resonator oscillator  

DOE Patents [OSTI]

A micro-miniature resonator-oscillator is disclosed. Due to the miniaturization of the resonator-oscillator, oscillation frequencies of one MHz and higher are utilized. A thickness-mode quartz resonator housed in a micro-machined silicon package and operated as a "telemetered sensor beacon" that is, a digital, self-powered, remote, parameter measuring-transmitter in the FM-band. The resonator design uses trapped energy principles and temperature dependence methodology through crystal orientation control, with operation in the 20-100 MHz range. High volume batch-processing manufacturing is utilized, with package and resonator assembly at the wafer level. Unique design features include squeeze-film damping for robust vibration and shock performance, capacitive coupling through micro-machined diaphragms allowing resonator excitation at the package exterior, circuit integration and extremely small (0.1 in. square) dimensioning. A family of micro-miniature sensor beacons is also disclosed with widespread applications as bio-medical sensors, vehicle status monitors and high-volume animal identification and health sensors. The sensor family allows measurement of temperatures, chemicals, acceleration and pressure. A microphone and clock realization is also available.

Koehler, Dale R. (Albuquerque, NM); Sniegowski, Jeffry J. (Albuquerque, NM); Bivens, Hugh M. (Albuquerque, NM); Wessendorf, Kurt O. (Albuquerque, NM)

1994-01-01T23:59:59.000Z

196

ARM - PI Product - Large Scale Ice Water Path and 3-D Ice Water Content  

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

ProductsLarge Scale Ice Water Path and 3-D Ice Water ProductsLarge Scale Ice Water Path and 3-D Ice Water Content Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send PI Product : Large Scale Ice Water Path and 3-D Ice Water Content Site(s) SGP TWP General Description Cloud ice water concentration is one of the most important, yet poorly observed, cloud properties. Developing physical parameterizations used in general circulation models through single-column modeling is one of the key foci of the ARM program. In addition to the vertical profiles of temperature, water vapor and condensed water at the model grids, large-scale horizontal advective tendencies of these variables are also required as forcing terms in the single-column models. Observed horizontal advection of condensed water has not been available because the

197

Single Column Model Simulations of Cloud Sensitivity to Forcing  

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

Single-Column Model Simulations Single-Column Model Simulations of Cloud Sensitivity to Forcing A. D. Del Genio National Aeronautics and Space Administration Goddard Institute for Space Studies New York, New York A. B. Wolf National Aeronautics and Space Administration SGT, Inc., Goddard Institute for Space Studies New York, New York Introduction The Atmospheric Radiation Measurement (ARM) Program single-column modeling (SCM) framework has to date used several fairly brief intensive observing periods (IOPs) to evaluate the performance of climate model parameterizations. With only a few weather events in each IOP, it is difficult to separate errors associated with the instantaneous dynamical forcing from errors in parameterization. It is also impossible to determine whether model errors are systematic and climatically significant. This

198

the Fractional Flotation of Flotation Column Particles Opportunity  

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

Enhancing Selectivity and Recovery in Enhancing Selectivity and Recovery in the Fractional Flotation of Flotation Column Particles Opportunity Although research is currently inactive on the patented technology "Method for Enhancing Selectivity and Recovery in the Fractional Flotation of Flotation Column Particles," the technology is available for licensing from the U.S. Department of Energy's National Energy Technology Laboratory (NETL). Disclosed in this patent is a method of particle separation from a feed stream comprised of particles of varying hydrophobicity by injecting the feed stream directly into the froth zone of a vertical flotation column in the presence of a counter-current reflux stream. The current invention allows the height of the feed stream injection and the reflux ratio to be

199

The Monte Carlo Independent Column Approximation Model Intercomparison  

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

The Monte Carlo Independent Column Approximation Model Intercomparison The Monte Carlo Independent Column Approximation Model Intercomparison Project (McMIP) Barker, Howard Meteorological Service of Canada Cole, Jason Meteorological Service of Canada Raisanen, Petri Finnish Meteorological Institute Pincus, Robert NOAA-CIRES Climate Diagnostics Center Morcrette, Jean-Jacques European Centre for Medium-Range Weather Forecasts Li, Jiangnan Canadian Center for Climate Modelling Stephens, Graeme Colorado State University Vaillancourt, Paul Environment Canada Oreopoulos, Lazaros JCET/UMBC and NASA/GSFC Siebesma, Pier KNMI Los, Alexander KNMI Clothiaux, Eugene The Pennsylvania State University Randall, David Colorado State University Iacono, Michael Atmospheric & Environmental Research, Inc. Category: Radiation The Monte Carlo Independent Column Approximation (McICA) method for

200

Collective behavior of coupled nonuniform stochastic oscillators  

E-Print Network [OSTI]

Theoretical studies of synchronization are usually based on models of coupled phase oscillators which, when isolated, have constant angular frequency. Stochastic discrete versions of these uniform oscillators have also appeared in the literature, with equal transition rates among the states. Here we start from the model recently introduced by Wood et al. [Phys. Rev. Lett. 96}, 145701 (2006)], which has a collectively synchronized phase, and parametrically modify the phase-coupled oscillators to render them (stochastically) nonuniform. We show that, depending on the nonuniformity parameter $0\\leq \\alpha \\leq 1$, a mean field analysis predicts the occurrence of several phase transitions. In particular, the phase with collective oscillations is stable for the complete graph only for $\\alpha \\leq \\alpha^\\prime < 1$. At $\\alpha=1$ the oscillators become excitable elements and the system has an absorbing state. In the excitable regime, no collective oscillations were found in the model.

Vladimir R. V. Assis; Mauro Copelli

2012-01-27T23:59:59.000Z

Note: This page contains sample records for the topic "oscillating water column" 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

Neutrino interactions in oscillation experiments  

Science Journals Connector (OSTI)

We calculate the neutrino induced cross sections relevant for oscillation experiments, including the ?-lepton threshold for quasielastic, resonance and deep-inelastic scattering. In addition to threshold effects, we include nuclear corrections for heavy targets which are moderate for quasielastic and large for single pion production. The nuclear effects for deep-inelastic reactions are small. We present cross sections together with their nuclear corrections for various channels which are useful for interpreting the experimental results and for determining parameters of the neutrino sector. Finally, we calculate the ?-lepton event rates for the OPERA LBL experiment.

E. A. Paschos and J. Y. Yu

2002-01-07T23:59:59.000Z

202

A new model for solvent extraction in columns  

SciTech Connect (OSTI)

A new model was developed for analyzing solvent extraction processes carried out in columns. Each column is treated as a series of well-defined equilibrium stages where the backmixing (other-phase carryover) between stages can be large. By including all mass transfer effects in the backmixing value, the same number of stages can be used for all extracted components no matter what their distribution coefficients. This greatly simplifies the calculations required when modeling multicomponent solvent extraction processes. Initial testing shows the new model to be better than either the Height of an Equivalent Theoretical Plate (HETP) or the Height of a Transfer Unit (HTU) method.

Leonard, R.A.; Regalbuto, M.C.; Chamberlain, D.B.; Vandegrift, G.F.

1989-12-08T23:59:59.000Z

203

On the Pacific Decadal Oscillation and the Atlantic Multidecadal Oscillation: Might they be related?  

E-Print Network [OSTI]

? Marc d'Orgeville1 and W. Richard Peltier1 Received 3 August 2007; revised 21 September 2007; accepted 1. Peltier (2007), On the Pacific Decadal Oscillation and the Atlantic Multidecadal Oscillation: Might

Peltier, W. Richard

204

Non-standard Neutrino Oscillations at Icecube  

E-Print Network [OSTI]

In this talk I review the potential of Icecube for revealing physics beyond the standard model in the oscillation of atmospheric neutrinos.

M. C. Gonzalez-Garcia

2006-12-19T23:59:59.000Z

205

Interfacing ultracold atoms and mechanical oscillators.  

E-Print Network [OSTI]

??In this thesis I present experiments investigating controlled coupling between mechanical oscillators and ultracold atoms. I report on three different coupling mechanisms. In a first… (more)

Camerer, Stephan

2011-01-01T23:59:59.000Z

206

Nonlinear nanomechanical oscillators for ultrasensitive inertial detection  

DOE Patents [OSTI]

A system for ultrasensitive mass and/or force detection of this invention includes a mechanical oscillator driven to oscillate in a nonlinear regime. The mechanical oscillator includes a piezoelectric base with at least one cantilever resonator etched into the piezoelectric base. The cantilever resonator is preferably a nonlinear resonator which is driven to oscillate with a frequency and an amplitude. The system of this invention detects an amplitude collapse of the cantilever resonator at a bifurcation frequency as the cantilever resonator stimulated over a frequency range. As mass and/or force is introduced to the cantilever resonator, the bifurcation frequency shifts along a frequency axis in proportion to the added mass.

Datskos, Panagiotis George; Lavrik, Nickolay V

2013-08-13T23:59:59.000Z

207

CPT-Odd Resonances in Neutrino Oscillations  

Science Journals Connector (OSTI)

We consider the consequences for future neutrino factory experiments of small CPT-odd interactions in neutrino oscillations. The ????? and ?¯???¯? survival probabilities at a baseline L=732 km can test for CPT-odd contributions at orders of magnitude better sensitivity than present neutrino sector limits. Interference between the CPT-violating interaction and CPT-even mass terms in the Lagrangian can lead to a resonant enhancement of the oscillation amplitude. For oscillations in matter, a simultaneous enhancement of both neutrino and antineutrino oscillation amplitudes is possible.

V. Barger; S. Pakvasa; T. J. Weiler; K. Whisnant

2000-12-11T23:59:59.000Z

208

Micromagnetic study of auto-oscillation modes in spin-Hall nano-oscillators  

SciTech Connect (OSTI)

We present a numerical study of magnetization dynamics in a recently introduced spin torque nano-oscillator, whose operational principle relies on the spin-Hall effect—spin-Hall nano-oscillators. Our numerical results show good agreement with the experimentally observed behaviors and provide detailed information about the features of the primary auto-oscillation mode observed in the experiments. They also clarify the physical nature of the secondary auto-oscillation mode, which was experimentally observed under certain conditions only.

Ulrichs, H., E-mail: henning.ulrichs@uni-muenster.de; Demidov, V. E.; Demokritov, S. O. [Department of Physics and Center for Nonlinear Science, University of Münster, Corrensstraße 2-4, 48149 Münster (Germany)

2014-01-27T23:59:59.000Z

209

Visualization of Jet Mixing in a Fluidic Oscillator  

Science Journals Connector (OSTI)

The fluidic oscillator is a device that generates an oscillating jet when supplied with fluid at pressure. The oscillator has no moving parts - the creation of the unsteady jet is based solely on fluid-dynamic interactions. Fluidic oscillators can operate ... Keywords: Flow control, Fluid mixing, Fluidic oscillator, Pressure-sensitive paint

J. W. Gregory; J. P. Sullivan; S. Raghu

2005-04-01T23:59:59.000Z

210

The light mutant oscillator (LMO); a novel circadian oscillator in Neurospora crassa  

E-Print Network [OSTI]

FRQ/WCC oscillator, several lines of evidence have implied the presence of other oscillators which may have important functions in the N. crassa circadian clock system. However, the molecular details are only known for the core FRQ/WCC oscillator...

Huang, He

2009-05-15T23:59:59.000Z

211

Water quality Water quantity  

E-Print Network [OSTI]

01-1 · Water quality · Water quantity · Remediation strategies MinE 422: Water Resources: Younger, Banwart and Hedin. 2002. Mine Water. Hydrology, Pollution, Remediation. Impacts of mining on water mining ­ Often the largest long term issue ­ Water quality affected, surface/ground water pollution

Boisvert, Jeff

212

Water quality Water quantity  

E-Print Network [OSTI]

· Water quality · Water quantity · Remediation strategies MinE 422: Water Resources: Younger, Banwart and Hedin. 2002. Mine Water. Hydrology, Pollution, Remediation. Impacts of mining on water mining ­ Often the largest long term issue ­ Water quality affected, surface/ground water pollution

Boisvert, Jeff

213

" Row: Selected SIC Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

1. Fuel Consumption, 1998;" 1. Fuel Consumption, 1998;" " Level: National Data; " " Row: Selected SIC Codes; Column: Energy Sources;" " Unit: Physical Units or Btu." " "," "," ",," "," "," "," "," "," "," "," ",," " " "," ",,,,,,,,"Coke" " "," "," ","Net","Residual","Distillate","Natural Gas(d)","LPG and","Coal","and Breeze"," ","RSE" "SIC"," ","Total","Electricity(b)","Fuel Oil","Fuel Oil(c)","(billion","NGL(e)","(million","(million","Other(f)","Row"

214

" Row: Selected SIC Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

S5.1. Selected Byproducts in Fuel Consumption, 1998;" S5.1. Selected Byproducts in Fuel Consumption, 1998;" " Level: National Data; " " Row: Selected SIC Codes; Column: Energy Sources;" " Unit: Trillion Btu." " "," "," "," "," "," "," "," ","Waste"," ",," " " "," "," ","Blast"," "," ","Pulping Liquor"," ","Oils/Tars","RSE" "SIC"," "," ","Furnace/Coke"," ","Petroleum","or","Wood Chips,","and Waste","Row"

215

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

2. Fuel Consumption, 1998;" 2. Fuel Consumption, 1998;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Trillion Btu." " "," "," ",," "," "," "," "," "," "," "," ",," " " "," ",,,,,,,,,,"RSE" "NAICS"," "," ","Net","Residual","Distillate",,"LPG and",,"Coke"," ","Row" "Code(a)","Subsector and Industry","Total","Electricity(b)","Fuel Oil","Fuel Oil(c)","Natural Gas(d)","NGL(e)","Coal","and Breeze","Other(f)","Factors"

216

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

2 Fuel Consumption, 2010;" 2 Fuel Consumption, 2010;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Trillion Btu." " "," "," ",," "," "," "," "," "," "," " " "," " "NAICS"," "," ","Net","Residual","Distillate",,"LPG and",,"Coke"," " "Code(a)","Subsector and Industry","Total","Electricity(b)","Fuel Oil","Fuel Oil(c)","Natural Gas(d)","NGL(e)","Coal","and Breeze","Other(f)"

217

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

1 Offsite-Produced Fuel Consumption, 2002;" 1 Offsite-Produced Fuel Consumption, 2002;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Physical Units or Btu." " "," "," ",," "," "," "," "," "," "," "," ",," " " "," ",,,,,,,,"Coke" " "," "," ",,"Residual","Distillate","Natural","LPG and","Coal","and Breeze"," ","RSE" "NAICS"," ","Total","Electricity(b)","Fuel Oil","Fuel Oil(c)","Gas(d)","NGL(e)","(million","(million","Other(f)","Row"

218

" Row: Selected SIC Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

2. Fuel Consumption, 1998;" 2. Fuel Consumption, 1998;" " Level: National Data; " " Row: Selected SIC Codes; Column: Energy Sources;" " Unit: Trillion Btu." " "," "," ",," "," "," "," "," "," "," "," ",," " " "," ",,,,,,,,,,"RSE" "SIC"," "," ","Net","Residual","Distillate",,"LPG and",,"Coke"," ","Row" "Code(a)","Major Group and Industry","Total","Electricity(b)","Fuel Oil","Fuel Oil(c)","Natural Gas(d)","NGL(e)","Coal","and Breeze","Other(f)","Factors"

219

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

2 Fuel Consumption, 2002;" 2 Fuel Consumption, 2002;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Trillion Btu." " "," "," ",," "," "," "," "," "," "," "," ",," " " "," ",,,,,,,,,,"RSE" "NAICS"," "," ","Net","Residual","Distillate","Natural","LPG and",,"Coke"," ","Row" "Code(a)","Subsector and Industry","Total","Electricity(b)","Fuel Oil","Fuel Oil(c)","Gas(d)","NGL(e)","Coal","and Breeze","Other(f)","Factors"

220

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

1 Fuel Consumption, 2002;" 1 Fuel Consumption, 2002;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Physical Units or Btu." " "," "," ",," "," "," "," "," "," "," "," ",," " " "," ",,,,,,,,"Coke" " "," "," ","Net","Residual","Distillate","Natural","LPG and","Coal","and Breeze"," ","RSE" "NAICS"," ","Total","Electricity(b)","Fuel Oil","Fuel Oil(c)","Gas(d)","NGL(e)","(million","(million","Other(f)","Row"

Note: This page contains sample records for the topic "oscillating water column" 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

" Row: NAICS Codes; Column: Electricity Components;"  

U.S. Energy Information Administration (EIA) Indexed Site

1. Electricity: Components of Net Demand, 1998;" 1. Electricity: Components of Net Demand, 1998;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Electricity Components;" " Unit: Million Kilowatthours." " "," ",,,,,," " " "," ",,,,"Sales and","Net Demand","RSE" "NAICS"," ",,,"Total Onsite","Transfers","for","Row" "Code(a)","Subsector and Industry","Purchases","Transfers In(b)","Generation(c)","Offsite","Electricity(d)","Factors" ,,"Total United States"

222

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

1 Offsite-Produced Fuel Consumption, 2006;" 1 Offsite-Produced Fuel Consumption, 2006;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Physical Units or Btu." " "," "," ",,,," "," "," ",," "," "," "," "," " " "," ",,,,,,,,,,,"Coke" " "," "," ",,,,"Residual","Distillate","Natural Gas(d)",,"LPG and","Coal","and Breeze"," " "NAICS"," ","Total",,"Electricity(b)",,"Fuel Oil","Fuel Oil(c)","(billion",,"NGL(e)","(million","(million","Other(f)"

223

" Row: NAICS Codes; Column: Electricity Components;"  

U.S. Energy Information Administration (EIA) Indexed Site

1 Electricity: Components of Net Demand, 2002;" 1 Electricity: Components of Net Demand, 2002;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Electricity Components;" " Unit: Million Kilowatthours." " "," ",,,,,," " " "," ",,,"Total ","Sales and","Net Demand","RSE" "NAICS"," ",,"Transfers ","Onsite","Transfers","for","Row" "Code(a)","Subsector and Industry","Purchases"," In(b)","Generation(c)","Offsite","Electricity(d)","Factors" ,,"Total United States"

224

Behavior of the Mass Transfer Zone in a Biosorption Column  

E-Print Network [OSTI]

that Sargassum seaweed has a high efficiency for biosorption removal of toxic heavy metals (11). The biomass in a flow-through fixed-bed column. Copper has been chosen as a typical toxic heavy metal with simple is a process whereby certain types of inactive, dead biomass may bind and concentrate heavy metals from aqueous

Volesky, Bohumil

225

Assessment of solution uncertainties in single-column modeling frameworks  

SciTech Connect (OSTI)

Single-column models (SCMs) have been extensively promoted in recent years as an effective means to develop and test physical parameterizations targeted for more complex three-dimensional climate models. Although there are some clear advantages associated with single-column modeling, there are also some significant disadvantages, including the absence of large-scale feedbacks. Basic limitations of an SCM framework can make it difficult to interpret solutions, and at times contribute to rather striking failures to identify even first-order sensitivities as they would be observed in a global climate simulation. This manuscript will focus on one of the basic experimental approaches currently exploited by the single-column modeling community, with an emphasis on establishing the inherent uncertainties in the numerical solutions. The analysis will employ the standard physics package from the NCAR CCM3 and will illustrate the nature of solution uncertainties that arise from nonlinearities in parameterized physics. The results of this study suggest the need to make use of an ensemble methodology when conducting single-column modeling investigations.

Hack, J.J.; Pedretti, J.A.

2000-01-15T23:59:59.000Z

226

Plastic Hinging Behavior of Reinforced Concrete Bridge Columns  

E-Print Network [OSTI]

of the seismic performance of four-span large-scale bridge systems at the University of Nevada Reno that details deformations in column hinging regions during response to strong shaking events. In order to evaluate the plastic hinging regions, a photogrammetric...

Firat Alemdar, Zeynep

2010-04-27T23:59:59.000Z

227

Novel Column Heater for Fast Capillary Gas Chromatography  

Science Journals Connector (OSTI)

......expected advantage of radial heating with the coaxial heater...with other "coated" heating elements, differences...Louisiana light crude oil; 3 m 0.1 mm phenyl...expansion coefficient, and price imposed substantial practical...existing standard column heating technology. Thus, chromatographic......

E.U. Ehrmann; H.P. Dharmasena; K. Carney; E.B. Overton

1996-12-01T23:59:59.000Z

228

COMPRESSION OF A PLASMA COLUMN OF INFINITE ELECTROCONDUCTIVITY SITUATED  

E-Print Network [OSTI]

45 COMPRESSION OF A PLASMA COLUMN OF INFINITE ELECTROCONDUCTIVITY SITUATED IN AN EXTERNAL AXIAL velocity, ion temperature, electron temperature and plasma density is analysed. The experimental results [1. Amongst the dissipative processes we are primarily concerned here with the electron heat conductivity

Boyer, Edmond

229

Modeling of Immobilized Cell Columns for Bioconversion and Wastewater Treatment  

E-Print Network [OSTI]

Modeling of Immobilized Cell Columns for Bioconversion and Wastewater Treatment Tingyue Gu* and Mei used in bioconversions to produce biological products as well as in wastewater treatment such as solvent removal from wastewater streams. In this work, a rate model is proposed to simulate this kind

Gu, Tingyue

230

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

1 Fuel Consumption, 2010;" 1 Fuel Consumption, 2010;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Physical Units or Btu." " "," "," ",," "," "," "," "," "," "," " " "," ",,,,,,,,"Coke" " "," "," ","Net","Residual","Distillate","Natural Gas(d)","LPG and","Coal","and Breeze"," " "NAICS"," ","Total","Electricity(b)","Fuel Oil","Fuel Oil(c)","(billion","NGL(e)","(million","(million","Other(f)"

231

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

6 Quantity of Purchased Energy Sources, 2010;" 6 Quantity of Purchased Energy Sources, 2010;" " Level: National and Regional Data;" " Row: NAICS Codes; Column: Energy Sources;" " Unit: Physical Units or Btu." " "," "," ",," "," "," "," "," "," "," " " "," ",,,,,,,,"Coke" " "," "," ",,"Residual","Distillate","Natural Gas(c)","LPG and","Coal","and Breeze"," " "NAICS"," ","Total","Electricity","Fuel Oil","Fuel Oil(b)","(billion","NGL(d)","(million","(million","Other(e)"

232

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

1. Fuel Consumption, 1998;" 1. Fuel Consumption, 1998;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Physical Units or Btu." " "," "," ",," "," "," "," "," "," "," "," ",," " " "," ",,,,,,,,"Coke" " "," "," ","Net","Residual","Distillate","Natural Gas(d)","LPG and","Coal","and Breeze"," ","RSE" "NAICS"," ","Total","Electricity(b)","Fuel Oil","Fuel Oil(c)","(billion","NGL(e)","(million","(million","Other(f)","Row"

233

Petrovay: Solar physics Helioseismology SOLAR OSCILLATIONS: INTRODUCTION  

E-Print Network [OSTI]

: Solar oscillations first observed by both Doppler and intensity method (Leighton, Noyes & Simon 1962: ApPetrovay: Solar physics Helioseismology SOLAR OSCILLATIONS: INTRODUCTION Small departures from hydrostatic equilibrium caused by ­ turbulent convection ­ localized events related to solar activity (e

Petrovay, Kristóf

234

Oscillator Architectures and Enhanced Frequency Synthesizer  

E-Print Network [OSTI]

A voltage controlled oscillator (VCO), that generates a periodic signal whose frequency is tuned by a voltage, is a key building block in any integrated circuit systems. A sine wave oscillator can be used for a built-in self testing where high...

Park, Sang Wook

2009-11-16T23:59:59.000Z

235

February 2002 Grid Scale Oscillations in MICOM  

E-Print Network [OSTI]

are the implications of the grid scale oscillation on ­ Surface Fluxes that drive THC ­ Heat transport ­ MeridionalFebruary 2002 Grid Scale Oscillations in MICOM Balasubramanya T. Nadiga Los Alamos National Model · 3o displaced pole grid. 16 layers · Kraus-Turner Bulk Mixed Layer · Explicit diapycnal

Nadiga, Balasubramanya T. "Balu"

236

DETERMINATION OF AMMONIA IN NATURAL WATERS BY THE ...  

Science Journals Connector (OSTI)

NOTES AND COMMENT. 799 and a suspension of resin in water poured into an ion exchange column ( 8 x 0.5 cm),. After settling, it was washed with three.

2000-02-12T23:59:59.000Z

237

Chemical sensor with oscillating cantilevered probe  

DOE Patents [OSTI]

The invention provides a method of detecting a chemical species with an oscillating cantilevered probe. A cantilevered beam is driven into oscillation with a drive mechanism coupled to the cantilevered beam. A free end of the oscillating cantilevered beam is tapped against a mechanical stop coupled to a base end of the cantilevered beam. An amplitude of the oscillating cantilevered beam is measured with a sense mechanism coupled to the cantilevered beam. A treated portion of the cantilevered beam is exposed to the chemical species, wherein the cantilevered beam bends when exposed to the chemical species. A second amplitude of the oscillating cantilevered beam is measured, and the chemical species is determined based on the measured amplitudes.

Adams, Jesse D

2013-02-05T23:59:59.000Z

238

Pulse combustor with controllable oscillations  

DOE Patents [OSTI]

A pulse combustor having thermally induced pulse combustion in a continuously flowing system is described. The pulse combustor is fitted with at lease one elongated ceramic body which significantly increases the heat transfer area in the combustion chamber of the combustor. The ceramic body or bodies possess sufficient mass and heat capacity to ignite the fuel-air charge once the ceramic body or bodies are heated by conventional spark plug initiated combustion so as to provide repetitive ignition and combustion of sequentially introduced fuel-air charges without the assistance of the spark plug and the rapid quenching of the flame after each ignition in a controlled manner so as to provide a selective control over the oscillation frequency and amplitude. Additional control over the heat transfer in the combustion chamber is provided by employing heat exchange mechanisms for selectively heating or cooling the elongated ceramic body or bodies and/or the walls of the combustion chamber.

Richards, George A. (Morgantown, WV); Welter, Michael J. (Columbiana, OH); Morris, Gary J. (Morgantown, WV)

1992-01-01T23:59:59.000Z

239

Recent Arctic Sea Ice Variability: Connections to the Arctic Oscillation and the ENSO  

E-Print Network [OSTI]

of regional and global climate through the ice albedo feed- back, insulating effect, deep water formationRecent Arctic Sea Ice Variability: Connections to the Arctic Oscillation and the ENSO Jiping Liu; accepted 20 April 2004; published 13 May 2004. [1] Trends in the satellite-derived Arctic sea ice

240

Neutron-Mirror-Neutron Oscillations in a Trap  

E-Print Network [OSTI]

We calculate the rate of neutron-mirror-neutron oscillations for ultracold neutrons trapped in a storage vessel. Recent experimental bounds on the oscillation time are discussed.

B. Kerbikov; O. Lychkovskiy

2008-04-03T23:59:59.000Z

Note: This page contains sample records for the topic "oscillating water column" 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

Neutron–mirror-neutron oscillations in a trap  

Science Journals Connector (OSTI)

We calculate the rate of neutron–mirror-neutron oscillations for ultracold neutrons trapped in a storage vessel. Recent experimental bounds on the oscillation time are discussed.

B. Kerbikov and O. Lychkovskiy

2008-06-27T23:59:59.000Z

242

On the Dynamics of Two Oscillating Cosmic Strings  

Science Journals Connector (OSTI)

We present the spacetime interval of thenonradiated cosmic string oscillating as standing waves.The influence of string oscillations on the dynamics ofa “probe”...

T. Omarov; L. Chechin

243

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

3.4 Number of Establishments by Fuel Consumption, 2006;" 3.4 Number of Establishments by Fuel Consumption, 2006;" " Level: National Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Establishment Counts." " "," "," ",," "," "," "," "," "," "," ",," " " "," ","Any" "NAICS"," ","Energy","Net","Residual","Distillate",,"LPG and",,"Coke"," " "Code(a)","Subsector and Industry","Source(b)","Electricity(c)","Fuel Oil","Fuel Oil(d)","Natural Gas(e)","NGL(f)","Coal","and Breeze","Other(g)"

244

" Row: NAICS Codes; Column: Electricity Components;"  

U.S. Energy Information Administration (EIA) Indexed Site

1.1 Electricity: Components of Net Demand, 2010;" 1.1 Electricity: Components of Net Demand, 2010;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Electricity Components;" " Unit: Million Kilowatthours." " "," " " "," ",,,"Total ","Sales and","Net Demand" "NAICS"," ",,"Transfers ","Onsite","Transfers","for" "Code(a)","Subsector and Industry","Purchases","In(b)","Generation(c)","Offsite","Electricity(d)" ,,"Total United States" 311,"Food",75652,21,5666,347,80993

245

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

2 Offsite-Produced Fuel Consumption, 2002;" 2 Offsite-Produced Fuel Consumption, 2002;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Trillion Btu." " "," "," ",," "," "," "," "," "," "," "," ",," " " "," ",,,,,,,,,,"RSE" "NAICS"," "," ",,"Residual","Distillate","Natural","LPG and",,"Coke"," ","Row" "Code(a)","Subsector and Industry","Total","Electricity(b)","Fuel Oil","Fuel Oil(c)","Gas(d)","NGL(e)","Coal","and Breeze","Other(f)","Factors"

246

" Row: Selected SIC Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

1. Nonfuel (Feedstock) Use of Combustible Energy, 1998;" 1. Nonfuel (Feedstock) Use of Combustible Energy, 1998;" " Level: National Data; " " Row: Selected SIC Codes; Column: Energy Sources;" " Unit: Physical Units or Btu." " "," "," "," "," "," "," "," "," "," "," ",," " " "," ",,,,,,,"Coke" " "," "," ","Residual","Distillate","Natural Gas(c)","LPG and","Coal","and Breeze"," ","RSE" "SIC"," ","Total","Fuel Oil","Fuel Oil(b)","(billion","NGL(d)","(million","(million","Other(e)","Row"

247

" Column: Energy-Consumption Ratios;"  

U.S. Energy Information Administration (EIA) Indexed Site

3 Consumption Ratios of Fuel, 2006;" 3 Consumption Ratios of Fuel, 2006;" " Level: National Data; " " Row: Values of Shipments within NAICS Codes;" " Column: Energy-Consumption Ratios;" " Unit: Varies." ,,,,"Consumption" ,,,"Consumption","per Dollar" ,,"Consumption","per Dollar","of Value" "NAICS",,"per Employee","of Value Added","of Shipments" "Code(a)","Economic Characteristic(b)","(million Btu)","(thousand Btu)","(thousand Btu)" ,,"Total United States" " 311 - 339","ALL MANUFACTURING INDUSTRIES"

248

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

4 Number of Establishments by Offsite-Produced Fuel Consumption, 2002;" 4 Number of Establishments by Offsite-Produced Fuel Consumption, 2002;" " Level: National Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Establishment Counts." " "," "," ",," "," "," "," "," "," "," "," ",," " " "," ","Any",,,,,,,,,"RSE" "NAICS"," ","Energy",,"Residual","Distillate","Natural","LPG and",,"Coke"," ","Row" "Code(a)","Subsector and Industry","Source(b)","Electricity(c)","Fuel Oil","Fuel Oil(d)","Gas(e)","NGL(f)","Coal","and Breeze","Other(g)","Factors"

249

" Column: Energy-Consumption Ratios;"  

U.S. Energy Information Administration (EIA) Indexed Site

3 Consumption Ratios of Fuel, 2002;" 3 Consumption Ratios of Fuel, 2002;" " Level: National Data; " " Row: Values of Shipments within NAICS Codes;" " Column: Energy-Consumption Ratios;" " Unit: Varies." " "," ",,,"Consumption"," " " "," ",,"Consumption","per Dollar" " "," ","Consumption","per Dollar","of Value","RSE" "NAICS",,"per Employee","of Value Added","of Shipments","Row" "Code(a)","Economic Characteristic(b)","(million Btu)","(thousand Btu)","(thousand Btu)","Factors"

250

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

4 Number of Establishments by Fuel Consumption, 2002;" 4 Number of Establishments by Fuel Consumption, 2002;" " Level: National Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Establishment Counts." " "," "," ",," "," "," "," "," "," "," "," ",," " " "," ","Any",,,,,,,,,"RSE" "NAICS"," ","Energy","Net","Residual","Distillate","Natural","LPG and",,"Coke"," ","Row" "Code(a)","Subsector and Industry","Source(b)","Electricity(c)","Fuel Oil","Fuel Oil(d)","Gas(e)","NGL(f)","Coal","and Breeze","Other(g)","Factors"

251

Automated two column generator systems for medical radionuclides  

Science Journals Connector (OSTI)

This work describes automated chromatographic methods for the separation of medically useful radionuclides from source material containing their parent radionuclides. The separation techniques employ two chromatographic columns to ensure high chemical and radiochemical purity of the product radionuclide. The separations were performed using an automated system, the automated radionuclide separator (ARS2), consisting of syringe pumps and multiport valves controlled through a computer interface. Generator systems for 68Ga, 99mTc, 188Re and 213Bi will be described.

Daniel R. McAlister; E. Philip Horwitz

2009-01-01T23:59:59.000Z

252

Determination of plate efficiencies for conventional distillation columns  

E-Print Network [OSTI]

DETERMINATION OF PLATE EFFICIENCIES FOR CONVENTIONAL DISTILLATION COIUMNS A Thesis By Thomas Raymond Harris Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE May 1962 Ma)or Sub)ect t Chemical Engineering DETERMINATION OF PLATE EFFICIENCIES FOR CONVENTIONAL DISTILLATION COLUMNS A Thesis Thomas Raymond Harris Approred as to style and content bye Chairman of ommittee Head...

Harris, Thomas Raymond

2012-06-07T23:59:59.000Z

253

Nano and viscoelastic Beck's column on elastic foundation  

E-Print Network [OSTI]

Beck's type column on Winkler type foundation is the subject of the present analysis. Instead of the Bernoulli-Euler model describing the rod, two generalized models will be adopted: Eringen non-local model corresponding to nano-rods and viscoelastic model of fractional Kelvin-Voigt type. The analysis shows that for nano-rod, the Herrmann-Smith paradox holds while for viscoelastic rod it does not.

Atanackovic, Teodor M; Zorica, Dusan

2014-01-01T23:59:59.000Z

254

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

2.4 Number of Establishments by Nonfuel (Feedstock) Use of Combustible Energy, 2006;" 2.4 Number of Establishments by Nonfuel (Feedstock) Use of Combustible Energy, 2006;" " Level: National Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Establishment Counts." " "," "," "," "," "," "," "," "," "," ",," " " "," ","Any Combustible" "NAICS"," ","Energy","Residual","Distillate",,"LPG and",,"Coke"," " "Code(a)","Subsector and Industry","Source(b)","Fuel Oil","Fuel Oil(c)","Natural Gas(d)","NGL(e)","Coal","and Breeze","Other(f)"

255

" Row: NAICS Codes; Column: Electricity Components;"  

U.S. Energy Information Administration (EIA) Indexed Site

1.1 Electricity: Components of Net Demand, 2006;" 1.1 Electricity: Components of Net Demand, 2006;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Electricity Components;" " Unit: Million Kilowatthours." " "," " " "," ",,,"Total ","Sales and","Net Demand" "NAICS"," ",,"Transfers ","Onsite","Transfers","for" "Code(a)","Subsector and Industry","Purchases","In(b)","Generation(c)","Offsite","Electricity(d)" ,,"Total United States" 311,"Food",73242,309,4563,111,78003

256

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

6 Quantity of Purchased Energy Sources, 2002;" 6 Quantity of Purchased Energy Sources, 2002;" " Level: National and Regional Data;" " Row: NAICS Codes; Column: Energy Sources;" " Unit: Physical Units or Btu." " "," "," ",," "," "," "," "," "," "," "," ",," " " "," ",,,,,,,,"Coke" " "," "," ",,"Residual","Distillate","Natural","LPG and","Coal","and Breeze"," ","RSE" "NAICS"," ","Total","Electricity","Fuel Oil","Fuel Oil(b)"," Gas(c)","NGL(d)","(million","(million ","Other(e)","Row"

257

" Row: Selected SIC Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

2. Nonfuel (Feedstock) Use of Combustible Energy, 1998;" 2. Nonfuel (Feedstock) Use of Combustible Energy, 1998;" " Level: National Data; " " Row: Selected SIC Codes; Column: Energy Sources;" " Unit: Trillion Btu." " "," "," "," "," "," "," "," "," "," "," ",," " " "," ",,,,,,,,,"RSE" "SIC"," "," ","Residual","Distillate",,"LPG and",,"Coke"," ","Row" "Code(a)","Major Group and Industry","Total","Fuel Oil","Fuel Oil(b)","Natural Gas(c)","NGL(d)","Coal","and Breeze","Other(e)","Factors"

258

" Row: Selected SIC Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

S4.1. Offsite-Produced Fuel Consumption, 1998;" S4.1. Offsite-Produced Fuel Consumption, 1998;" " Level: National Data; " " Row: Selected SIC Codes; Column: Energy Sources;" " Unit: Physical Units or Btu." " "," "," ",," "," "," "," "," "," "," "," ",," " " "," ",,,,,,,,"Coke" " "," "," ",,"Residual","Distillate","Natural Gas(d)","LPG and","Coal","and Breeze"," ","RSE" "SIC"," ","Total","Electricity(b)","Fuel Oil","Fuel Oil(c)","(billion","NGL(e)","(million","(million","Other(f)","Row"

259

Viscosity of Interfacial Water  

Science Journals Connector (OSTI)

The effective shear viscosity and frequency-dependent dynamic oscillatory shear spectra of water containing monovalent or divalent ions (ionic strength 25 mM), confined between mica crystals at 1–2 water molecules thickness, oscillated with twist angle with the period expected for the pseudohexagonal surface lattice. The effective viscosity varied by orders of magnitude as the twist angle was changed. Confinement appeared to imprint lateral spatial correlation on the ultrathin liquid, the more so the better the confining lattices were aligned, but the oft-proposed “ice structure” was not observed dynamically.

Yingxi Zhu and Steve Granick

2001-08-10T23:59:59.000Z

260

Self-seeding ring optical parametric oscillator  

DOE Patents [OSTI]

An optical parametric oscillator apparatus utilizing self-seeding with an external nanosecond-duration pump source to generate a seed pulse resulting in increased conversion efficiency. An optical parametric oscillator with a ring configuration are combined with a pump that injection seeds the optical parametric oscillator with a nanosecond duration, mJ pulse in the reverse direction as the main pulse. A retroreflecting means outside the cavity injects the seed pulse back into the cavity in the direction of the main pulse to seed the main pulse, resulting in higher conversion efficiency.

Smith, Arlee V. (Albuquerque, NM); Armstrong, Darrell J. (Albuquerque, NM)

2005-12-27T23:59:59.000Z

Note: This page contains sample records for the topic "oscillating water column" 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

Object-oriented approach applied to ANFIS modeling and control of a distillation column  

Science Journals Connector (OSTI)

Abstract Neurofuzzy networks are hybrid systems that combine neural networks with fuzzy systems, and the Adaptive Neuro-Fuzzy inference system (ANFIS) is a particular case in which a fuzzy system is implemented in the framework of an adaptive neural network. This neurofuzzy approach represents an effective structure to the modeling of plant dynamics, and the oriented-object programming environments offer an intuitive way to address this task. In this paper the MODELICA object-oriented environment has been applied to the ANFIS modeling and indirect control of the heavy and light product composition in a binary methanol-water distillation column by using the adaptive Levenberg–Marquardt approach. The results obtained demonstrate the potential of the adaptive ANFIS scheme under MODELICA for the dual control of composition both for changes in set points with null stationary error even when disturbances are present.

J. Fernandez de Canete; A. Garcia-Cerezo; I. Garcia-Moral; P. Del Saz; E. Ochoa

2013-01-01T23:59:59.000Z

262

Buckling propagation failure in semi-submersible platform columns  

Science Journals Connector (OSTI)

abstract The present paper aims at studying the behavior of stiffened panels from a column segment of a new generation of semi-submersible platforms up to the peak compressive load and in the post-buckling condition. Previous studies have demonstrated a strong influence of the mode and magnitude of initial geometric imperfections, as well as boundary conditions, on the structure's axial load capacity. Numerical–experimental correlation study for small-scale models was performed to define the proper numerical model to be used in more complex numerical simulations of the failure behavior of full-scale column structures. The stiffened panels were assessed to identify the buckling onset in a specific plate and its interaction with longitudinal and transversal stiffeners during the progressive column failure. Measurements of the geometric imperfection distribution of full-scale stiffened panels were collected during construction to better understand the buckling mechanism. Initial geometric imperfections were measured by means of laser-based equipment including a portable measuring system that uses laser technology with sub-millimeter accuracy.

Tiago P. Estefen; Segen F. Estefen

2012-01-01T23:59:59.000Z

263

Experimental and Analytical Studies on Old Reinforced Concrete Buildings with Seismically Vulnerable Beam-Column Joints  

E-Print Network [OSTI]

column axial load was controlled to follow the pre-definedThe column axial loads were controlled to follow Equation (The lateral load pattern is selected as follows, F i = ? i W

PARK, SANGJOON

2010-01-01T23:59:59.000Z

264

Automated metal-free multiple-column nanoLC for improved phosphopeptid...  

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

metal-free multiple-column nanoLC for improved phosphopeptide analysis sensitivity and throughput. Automated metal-free multiple-column nanoLC for improved phosphopeptide analysis...

265

Application of a Plantwide Control Design Procedure to a Distillation Column with Heat Pump  

E-Print Network [OSTI]

(Larsson & Skogestad 2001) to a distillation column heat-integrated by using a heatpump. Top-down analysis) and apply it to a distillation column with heatpump. Plantwide control design should start by formulating

Skogestad, Sigurd

266

Water, water everywhere  

Science Journals Connector (OSTI)

... available water resources, either locally or globally, are by no means exhausted. At present desalination -- the removal of salt from sea water or brackish water -- is very ... or brackish water -- is very expensive, mainly because it consumes so much energy. Desalination provides less than 0.2 per cent of all the water used in the world ...

Philip Ball

2000-01-27T23:59:59.000Z

267

Review Paper. Neutrino masses, mixing and oscillations  

Science Journals Connector (OSTI)

...experiments and experiments on the search for neutrinoless double beta-decay are briefly discussed. Neutrino Masses|Neutrino Oscillations|Neutrinoless Double beta-Decay| 10.1098/rspa.2003.1263 REVIEW PAPER...

2004-01-01T23:59:59.000Z

268

Oscillations in the GSI electron capture experiment  

E-Print Network [OSTI]

In a recent paper, oscillations observed in the electron capture probability were attributed to the mixing of neutrino mass eigenstates. This paper is shown to be in error in two respects.

H. Burkhardt; J. Lowe; G. J. Stephenson Jr.; T. Goldman; and Bruce H. J. McKellar

2008-04-07T23:59:59.000Z

269

Solar mass-varying neutrino oscillations  

E-Print Network [OSTI]

We propose that the solar neutrino deficit may be due to oscillations of mass-varying neutrinos (MaVaNs). This scenario elucidates solar neutrino data beautifully while remaining comfortably compatible with atmospheric neutrino and K2K data...

Marfatia, Danny; Huber, P.; Barger, V.

2005-11-18T23:59:59.000Z

270

Analysis of oscillating flow cooled SMA actuator  

E-Print Network [OSTI]

literature, most of the cooling mechanisms involve unidirectional forced convection. This may not be the most effective method. Oscillating flow in a channel can sometimes enhance heat transfer over a unidirectional flow. One possible explanation...

Pachalla Seshadri, Rajagopal

2005-11-01T23:59:59.000Z

271

CFD analysis of laminar oscillating flows  

SciTech Connect (OSTI)

This paper describes a numerical simulations of oscillating flow in a constricted duct and compares the results with experimental and theoretical data. The numerical simulations were performed using the computational fluid dynamics (CFD) code CFX4.2. The numerical model simulates an experimental oscillating flow facility that was designed to test the properties and characteristics of oscillating flow in tapered ducts, also known as jet pumps. Jet pumps are useful devices in thermoacoustic machinery because they produce a secondary pressure that can counteract an unwanted effect called streaming, and significantly enhance engine efficiency. The simulations revealed that CFX could accurately model velocity, shear stress and pressure variations in laminar oscillating flow. The numerical results were compared to experimental data and theoretical predictions with varying success. The least accurate numerical results were obtained when laminar flow approached transition to turbulent flow.

Booten, C. W. Charles W.); Konecni, S. (Snezana); Smith, B. L. (Barton L.); Martin, R. A. (Richard A.)

2001-01-01T23:59:59.000Z

272

Spatial xenon oscillation control with expert systems  

SciTech Connect (OSTI)

Spatial power oscillations were attributed to the xenon transients in a reactor core in 1958 by Randall and St. John. These transients are usually initiated by a local reactivity insertion and lead to divergent axial flux oscillations in the core at constant power. Several heuristic manual control strategies and automatic control methods were developed to damp the xenon oscillations at constant power operations. However, after the load-follow operation of the reactors became a necessity of life, a need for better control strategies arose. Even though various advanced control strategies were applied to solve the xenon oscillation control problem for the load-follow operation, the complexity of the system created difficulties in modeling. The strong nonlinearity of the problem requires highly sophisticated analytical approaches that are quite inept for numerical solutions. On the other hand, the complexity of a system and heuristic nature of the solutions are the basic reasons for using artificial intelligence techniques such as expert systems.

Alten, S. (Turkish Atomic Energy Authority, Ankara (Turkey)); Danofsky, R.A. (Iowa State Univ., Ames, IA (United States))

1993-01-01T23:59:59.000Z

273

The YNEV stellar evolution and oscillation code  

E-Print Network [OSTI]

We have developed a new stellar evolution and oscillation code YNEV, which calculates the structures and evolutions of stars, taking into account hydrogen and helium burning. A nonlocal turbulent convection theory and an updated overshoot mixing model are optional in this code. The YNEV code can evolve low- and intermediate-mass stars from pre-main sequence (PMS) to thermal pulsing asymptotic branch giant (TP-AGB) or white dwarf. The YNEV oscillation code calculates the eigenfrequencies and eigenfunctions of the adiabatic oscillations of given stellar structure. The input physics and the numerical scheme adopted in the code are introduced in this paper. The examples of solar models, stellar evolutionary tracks of low- and intermediate-mass stars with different convection theory (i.e., mixing-length theory (MLT) and the nonlocal turbulent convection theory), and stellar oscillations are shown.

Zhang, Q S

2014-01-01T23:59:59.000Z

274

Laboratory column experiments for radionuclide adsorption studies of the Culebra dolomite member of the Rustler Formation  

SciTech Connect (OSTI)

Radionuclide transport experiments were carried out using intact cores obtained from the Culebra member of the Rustler Formation inside the Waste Isolation Pilot Plant, Air Intake Shaft. Twenty-seven separate tests are reported here and include experiments with {sup 3}H, {sup 22}Na, {sup 241}Am, {sup 239}Np, {sup 228}Th, {sup 232}U and {sup 241}Pu, and two brine types, AIS and ERDA 6. The {sup 3}H was bound as water and provides a measure of advection, dispersion, and water self-diffusion. The other tracers were injected as dissolved ions at concentrations below solubility limits, except for americium. The objective of the intact rock column flow experiments is to demonstrate and quantify transport retardation coefficients, (R) for the actinides Pu, Am, U, Th and Np, in intact core samples of the Culebra Dolomite. The measured R values are used to estimate partition coefficients, (kd) for the solute species. Those kd values may be compared to values obtained from empirical and mechanistic adsorption batch experiments, to provide predictions of actinide retardation in the Culebra. Three parameters that may influence actinide R values were varied in the experiments; core, brine and flow rate. Testing five separate core samples from four different core borings provided an indication of sample variability. While most testing was performed with Culebra brine, limited tests were carried out with a Salado brine to evaluate the effect of intrusion of those lower waters. Varying flow rate provided an indication of rate dependent solute interactions such as sorption kinetics.

Lucero, D.A.; Heath, C.E. [Sandia National Labs., Albuquerque, NM (United States); Brown, G.O. [Oklahoma State Univ., Stillwater, OK (United States). Biosystems and Agricultural Engineering Dept.

1998-04-01T23:59:59.000Z

275

Comparison of Alternative Control Structures for an Ideal Two-Product Reactive Distillation Column  

E-Print Network [OSTI]

Comparison of Alternative Control Structures for an Ideal Two-Product Reactive Distillation Column distillation columns have been explored in many papers, very few papers have dealt with closed-loop control. Most of these control papers consider reactive distillation columns in which there is only one product

Al-Arfaj, Muhammad A.

276

A globally convergent method for finding all steady-state solutions of distillation columns  

E-Print Network [OSTI]

A globally convergent method for finding all steady-state solutions of distillation columns Ali distillation column with 7 steady-states show the robustness of the method. No published software known to the steady-state model of distillation columns as it returns the original system as a single large block

Neumaier, Arnold

277

Charge Collection Measurements in single-type column 3D Sensors  

E-Print Network [OSTI]

Charge Collection Measurements in single-type column 3D Sensors M. Scaringella*, A. Polyakov, and H sensors. In particular, 3D detectors with columns of both n-and p-doping are considered to be especially-substrate [5]. The principle of the single-type column 3D sensors is shown in Fig. 1. Their advantages over

California at Santa Cruz, University of

278

Laboratory Glass Columns "Next Generation" technology for high-performance preparative chromatography  

E-Print Network [OSTI]

SNAP ® Laboratory Glass Columns "Next Generation" technology for high-performance preparative lesiones graves o la muerte! WARNING Glass SNAP® columns are intended for use in a liquid environment disassembly or cleaning for scratches, chips or defects, particularly on the glass surfaces. DO NOT use column

Lebendiker, Mario

279

Comparative Study of Plasma Anodization of Silicon in a Column of a dc Glow Discharge  

Science Journals Connector (OSTI)

A comparative study of plasma anodization of silicon in the column of a dc oxygen glow discharge is presented. Quantitative results for growth rates of silicon dioxide in the negative glow Faraday dark space positive column and the anode fall are given. It is observed that the growth rate is higher in the positive column than the other regions of the discharge.

M. A. Copeland; R. Pappu

1971-01-01T23:59:59.000Z

280

Synchronization of Mechanical Oscillators: An Experimental Study  

E-Print Network [OSTI]

SYNCHRONIZATION OF MECHANICAL OSCILLATORS: AN EXPERIMENTAL STUDY A Thesis by ROOZBEH DANESHVAR Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements for the degree of MASTER OF SCIENCE December... 2010 Major Subject: Electrical Engineering SYNCHRONIZATION OF MECHANICAL OSCILLATORS: AN EXPERIMENTAL STUDY A Thesis by ROOZBEH DANESHVAR Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements...

Daneshvar, Roozbeh

2011-02-22T23:59:59.000Z

Note: This page contains sample records for the topic "oscillating water column" 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

Chaos control of parametric driven Duffing oscillators  

SciTech Connect (OSTI)

Duffing resonators are typical dynamic systems, which can exhibit chaotic oscillations, subject to certain driving conditions. Chaotic oscillations of resonating systems with negative and positive spring constants are identified to investigate in this paper. Parametric driver imposed on these two systems affects nonlinear behaviours, which has been theoretically analyzed with regard to variation of driving parameters (frequency, amplitude). Systematic calculations have been performed for these two systems driven by parametric pumps to unveil the controllability of chaos.

Jin, Leisheng; Mei, Jie; Li, Lijie, E-mail: L.Li@swansea.ac.uk [College of Engineering, Swansea University, Swansea SA2 8PP (United Kingdom)

2014-03-31T23:59:59.000Z

282

Noise properties of mutually sustained microwave-optoelectronic oscillator pair  

E-Print Network [OSTI]

Noise properties of mutually sustained microwave-optoelectronic oscillator pair E. Shumakher and G microwave-optoelectronic oscillator pair are described. The two oscillators have different spectral purities and exhibits low phase noise and highly suppressed spurious modes. Optoelectronic oscillators are employed

Eisenstein, Gadi

283

An Accelerated Poincar e-map method for Autonomous Oscillators  

E-Print Network [OSTI]

An Accelerated Poincar#19;e-map method for Autonomous Oscillators S.H.M.J. Houben #3; and J between non-autonomous and autonomous oscillators. Non-autonomous (or driven) oscillators have a time. On the other hand, autonomous (or free-running) oscillators have no time-dependent in- put signal, which means

Eindhoven, Technische Universiteit

284

Water Resources Water Quality and Water Treatment  

E-Print Network [OSTI]

Water Resources TD 603 Lecture 1: Water Quality and Water Treatment CTARA Indian Institute of Technology, Bombay 2nd November, 2011 #12;OVERVIEW Water Quality WATER TREATMENT PLANTS WATER TREATMENT PLANTS WATER TREATMENT PLANTS WATER TRE OVERVIEW OF THE LECTURE 1. Water Distribution Schemes Hand Pump

Sohoni, Milind

285

Oscillations During Thermonuclear X-ray Bursts  

E-Print Network [OSTI]

High amplitude, nearly coherent X-ray brightness oscillations during thermonuclear X-ray bursts were discovered with the Rossi X-ray Timing Explorer (RXTE) in early 1996. Spectral and timing evidence strongly supports the conclusion that these oscillations are caused by rotational modulation of the burst emission and that they reveal the spin frequency of neutron stars in low mass X-ray binaries, a long sought goal of X-ray astronomy. Studies carried out over the past year have led to the discovery of burst oscillations in four new sources, bringing to ten the number with confirmed burst oscillations. I review the status of our knowledge of these oscillations and indicate how they can be used to probe the physics of neutron stars. For a few burst oscillation sources it has been proposed that the strongest and most ubiquitous frequency is actually the first overtone of the spin frequency and hence that two nearly antipodal hot spots are present on the neutron star. This inference has important implications for both the physics of thermonuclear burning as well as the mass - radius relation for neutron stars, so its confirmation is crucial. I discuss recent attempts to confirm this hypothesis for 4U 1636-53, the source for which a signal at the putative fundamental (290 Hz) has been claimed.

Tod E. Strohmayer

2001-01-12T23:59:59.000Z

286

Spatial distribution of isoprene emissions from North America derived from formaldehyde column measurements by the OMI satellite sensor  

E-Print Network [OSTI]

Spatial distribution of isoprene emissions from North America derived from formaldehyde column isoprene emission from North America. OMI HCHO columns for June-August 2006 are consistent distribution of OMI HCHO columns follows that of isoprene emission; anthropogenic hydrocarbon emissions

Chance, Kelly

287

Coal fly ash interaction with environmental fluids: Geochemical and strontium isotope results from combined column and batch leaching experiments  

SciTech Connect (OSTI)

The major element and Sr isotope systematics and geochemistry of coal fly ash and its interactions with environmental waters were investigated using laboratory flow-through column leaching experiments (sodium carbonate, acetic acid, nitric acid) and sequential batch leaching experiments (water, acetic acid, hydrochloric acid). Column leaching of Class F fly ash samples shows rapid release of most major elements early in the leaching procedure, suggesting an association of these elements with soluble and surface bound phases. Delayed release of certain elements (e.g., Al, Fe, Si) signals gradual dissolution of more resistant silicate or glass phases as leaching continues. Strontium isotope results from both column and batch leaching experiments show a marked increase in {sup 87}Sr/{sup 86}Sr ratio with continued leaching, yielding a total range of values from 0.7107 to 0.7138. For comparison, the isotopic composition of fluid output from a fly ash impoundment in West Virginia falls in a narrow range around 0.7124. The experimental data suggest the presence of a more resistant, highly radiogenic silicate phase that survives the combustion process and is leached after the more soluble minerals are removed. Strontium isotopic homogenization of minerals in coal does not always occur during the combustion process, despite the high temperatures encountered in the boiler. Early-released Sr tends to be isotopically uniform; thus the Sr isotopic composition of fly ash could be distinguishable from other sources and is a useful tool for quantifying the possible contribution of fly ash leaching to the total dissolved load in natural surface and ground waters.

Brubaker, Tonya M.; Stewart, Brian W.; Capo, Rosemary C.; Schroeder, Karl T.; Chapman, Elizabeth C.; Spivak-Birndorf, Lev J.; Vesper, Dorothy J.; Cardone, Carol R.; Rohar, Paul C.

2013-05-01T23:59:59.000Z

288

Possible Observation of Nuclear Reactor Neutrinos Near the Oscillation Absolute Minimum  

E-Print Network [OSTI]

After a summary of the basic three neutrino oscillation formalism we review briefly our present empirical knowledge of the oscillation parameters and conclude that the 2-neutrinos model is adequate to describe the survival probability of the electronic neutrino P(nue->nue). Then we proceed to the evaluation of P(nue->nue) relative to the antineutrinos emitted by the nuclear power stations presently in operation along the the Rhone valley. We assume that a detector has been installed in a existing cavity located under the Mont Ventoux at a depth equivalent to 1500 m of water. We show that such an experiment would provide the opportunity to observe neutrinos near the oscillation absolute minimum. We end by a rough estimate of the counting rate.

C. Bouchiat

2003-04-27T23:59:59.000Z

289

PWR's xenon oscillation control through a fuzzy expert system automatically designed by means of genetic programming  

Science Journals Connector (OSTI)

This work proposes the use of genetic programming (GP) for automatic design of a fuzzy expert system aimed to provide the control of axial xenon oscillations in pressurized water reactors (PWRs). The control methodology is based on three axial offsets of xenon (AOx), iodine (AOi) and neutron flux (AOf), effectively used in former work. Simulations were made using a two-point xenon oscillation model, which employs the non-linear xenon and iodine balance equations and the one group, one-dimensional neutron diffusion equation, with non-linear power reactivity feedback, also proposed in the literature. Results have demonstrated the ability of the GP in finding a good fuzzy strategy, which can effectively control the axial xenon oscillations.

Roberto P. Domingos; Gustavo H.F. Caldas; Cláudio M.N.A. Pereira; Roberto Schirru

2003-01-01T23:59:59.000Z

290

Solution of bubble number density with breakage and coalescence in a bubble column by Least-Squares Method  

Science Journals Connector (OSTI)

A steady-state model has been built for an air-water bubble column. The bubble number density constitutive equation has been formulated through integrating the bubble transport equation. Proper kernels for bubble breakage and coalescence rate have been chosen. The momentum balance of the gas phase is included in the model which leads to a set of non-linear differential equations. The model has been successfully solved by using the Least-Squares Method (LSM) with high accuracy and fast convergence. The successive iteration has been applied to the linearised equation set. The model shows excellent agreements with experimental data.

Zhengjie Zhu; Carlos A. Dorao; Hugo A. Jakobsen

2009-01-01T23:59:59.000Z

291

ARM - Field Campaign - Water Vapor IOP  

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

govCampaignsWater Vapor IOP govCampaignsWater Vapor IOP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Water Vapor IOP 2000.09.18 - 2000.10.08 Lead Scientist : Henry Revercomb Data Availability Yes For data sets, see below. Description Scientific hypothesis: 1. Microwave radiometer (MWR) observations of the 22 GHz water vapor line can accurately constrain the total column amount of water vapor (assuming a calibration accuracy of 0.5 degC or better, which translates into 0.35 mm PWV). 2. Continuous profiling by Raman lidar provides a stable reference for handling sampling problems and observes a fixed column directly above the site only requiring a single height- independent calibration factor. 3. Agreement between the salt-bath calibrated in-situ probes, chilled

292

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

1 Fuel Consumption, 2006;" 1 Fuel Consumption, 2006;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Physical Units or Btu." ,,,,,,,,,,,,"Coke" ,,,,"Net",,"Residual","Distillate","Natural Gas(d)",,"LPG and","Coal","and Breeze" "NAICS",,"Total",,"Electricity(b)",,"Fuel Oil","Fuel Oil(c)","(billion",,"NGL(e)","(million","(million","Other(f)" "Code(a)","Subsector and Industry","(trillion Btu)",,"(million kWh)",,"(million bbl)","(million bbl)","cu ft)",,"(million bbl)","short tons)","short tons)","(trillion Btu)"

293

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

2 Fuel Consumption, 2006;" 2 Fuel Consumption, 2006;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Trillion Btu." "NAICS",,,,"Net",,"Residual","Distillate",,,"LPG and",,,"Coke" "Code(a)","Subsector and Industry","Total",,"Electricity(b)",,"Fuel Oil","Fuel Oil(c)","Natural Gas(d)",,"NGL(e)",,"Coal","and Breeze","Other(f)" ,,"Total United States" 311,"Food",1186,,251,,26,16,635,,3,,147,1,107 3112," Grain and Oilseed Milling",317,,53,,2,1,118,,"*",,114,0,30

294

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

1 Offsite-Produced Fuel Consumption, 2010;" 1 Offsite-Produced Fuel Consumption, 2010;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Physical Units or Btu." ,,,,,,,,,"Coke" ,,,,"Residual","Distillate","Natural Gas(d)","LPG and","Coal","and Breeze" "NAICS",,"Total","Electricity(b)","Fuel Oil","Fuel Oil(c)","(billion","NGL(e)","(million","(million","Other(f)" "Code(a)","Subsector and Industry","(trillion Btu)","(million kWh)","(million bbl)","(million bbl)","cu ft)","(million bbl)","short tons)","short tons)","(trillion Btu)"

295

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

2 Offsite-Produced Fuel Consumption, 2010;" 2 Offsite-Produced Fuel Consumption, 2010;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Trillion Btu." "NAICS",,,,"Residual","Distillate",,"LPG and",,"Coke" "Code(a)","Subsector and Industry","Total","Electricity(b)","Fuel Oil","Fuel Oil(c)","Natural Gas(d)","NGL(e)","Coal","and Breeze","Other(f)" ,,"Total United States" 311,"Food",1113,258,12,22,579,5,182,2,54 3112," Grain and Oilseed Milling",346,57,"*",1,121,"*",126,0,41

296

" Row: NAICS Codes; Column: Energy Sources;"  

U.S. Energy Information Administration (EIA) Indexed Site

2 Offsite-Produced Fuel Consumption, 2006;" 2 Offsite-Produced Fuel Consumption, 2006;" " Level: National and Regional Data; " " Row: NAICS Codes; Column: Energy Sources;" " Unit: Trillion Btu." "NAICS",,,,,,"Residual","Distillate",,,"LPG and",,,"Coke" "Code(a)","Subsector and Industry","Total",,"Electricity(b)",,"Fuel Oil","Fuel Oil(c)","Natural Gas(d)",,"NGL(e)",,"Coal","and Breeze","Other(f)" ,,"Total United States" 311,"Food",1124,,251,,26,16,635,,3,,147,1,45 3112," Grain and Oilseed Milling",316,,53,,2,1,118,,"*",,114,0,28

297

Small Column Ion Exchange Testing of Superlig 644 for Removal of 137Cs from Hanford Tank Waste Envelope C (Tank 241-AN-107)  

SciTech Connect (OSTI)

The current BNFL Inc. flowsheet for the pretreatment of the Hanford high-level tank wastes includes the use of Superlig{reg_sign} materials for removing {sup 137}Cs from the aqueous fraction of the waste. The Superlig materials applicable to cesium removal include the cesium-selective Superlig 632and Superlig 644. These materials have been developed and supplied by IBC Advanced Technologies, Inc., American Fork, Utah. This report describes the testing of the Superlig 644 ion exchange material in a small dual-column system. The bed volume of the lead column was 18.6 mL (L/D = 7), and the bed volume of the lag column was 15.9 mL (L/D = 6) during the loading phase. The sample processed was approximately 1.6 L of diluted waste ([Na{sup +}] = 4.84 M) from Tank 241-AN-107 (Envelope C). This sample had been previously treated for removal of Sr/transuranic (TRU) values and clarified in a single tube cross-flow filtration unit. All ion exchange process steps were tested, including resin-bed preparation, loading, feed displacement, water rinse, elution, eluant rinse, and resin regeneration. A summary of performance measures for both columns is shown in Table S1. The Cs {lambda} values represent a measure of the effective capacity of the SL-644 resin. The Cs {lambda} of 20 for the lead column is much lower than the estimated 150 obtained by the Savannah River Technology Center during Phase 1A testing. Equilibrium data obtained with batch contacts using the AN-107 Cs IX feed predicts a Cs {lambda} of 183. A Cs {lambda} for the lag column could not be determined due to insufficient breakthrough, but it appeared to work well and removed nearly all of the cesium not removed by the lead column. The low value for the lead column indicates that it did not perform as expected. This may have been due to air or gas in the bed that caused fluid channeling or blinding of the resin. The maximum decontamination factor (DF) for {sup 137}Cs listed in Table S1 is based on {sup 137}Cs concentration in the first samples collected from each column and the {sup 137}Cs concentration in the feed. The composite DF for {sup 137}Cs was 1,760, which provided an effluent with a {sup 137}Cs concentration of 8.7E-02 Ci/m{sup 3}. The {sup 137}Cs concentration is below the basis of design limit and is 7.2% of the contract limit for {sup 137}Cs.

DE Kurath; DL Blanchard; JR Bontha

2000-06-28T23:59:59.000Z

298

Sandia National Laboratories: News & Events  

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

outstanding ... Joint Sandia-DOE-HMRC Testing of a Floating Oscillating Water Column Wave Energy Converter Device On November 11, 2013, in Energy, News, News & Events,...

299

Water Calibration Measurements for Neutron Radiography: Application to Water Content Quantification in Porous Media  

SciTech Connect (OSTI)

Using neutron radiography, the measurement of water thickness was performed using aluminum (Al) water calibration cells at the High Flux Isotope Reactor (HFIR) Cold-Guide (CG) 1D neutron imaging facility at Oak Ridge National Laboratory, Oak Ridge, TN, USA. Calibration of water thickness is an important step to accurately measure water contents in samples of interest. Neutron attenuation by water does not vary linearly with thickness mainly due to beam hardening and scattering effects. Transmission measurements for known water thicknesses in water calibration cells allow proper correction of the underestimation of water content due to these effects. As anticipated, strong scattering effects were observed for water thicknesses greater than 2 mm when the water calibration cells were positioned close to the face of the detector / scintillator (0 and 2.4 cm away, respectively). The water calibration cells were also positioned 24 cm away from the detector face. These measurements resulted in less scattering and this position (designated as the sample position) was used for the subsequent experimental determination of the neutron attenuation coefficient for water. Neutron radiographic images of moist Flint sand in rectangular and cylindrical containers acquired at the sample position were used to demonstrate the applicability of the water calibration. Cumulative changes in the water volumes within the sand columns during monotonic drainage determined by neutron radiography were compared with those recorded by direct reading from a burette connected to a hanging water column. In general, the neutron radiography data showed very good agreement with those obtained volumetrically using the hanging water-column method. These results allow extension of the calibration equation to the quantification of unknown water contents within other samples of porous media.

Kang, Misun [ORNL; Bilheux, Hassina Z [ORNL; Voisin, Sophie [ORNL; Cheng, Chu-lin [University of Tennessee, Knoxville (UTK); Perfect, Edmund [University of Tennessee, Knoxville (UTK); Horita, Juske [Texas Tech University (TTU); Warren, Jeffrey [ORNL

2013-01-01T23:59:59.000Z

300

The Two-Column Aerosol Project (TCAP) Science Plan  

SciTech Connect (OSTI)

The Two-Column Aerosol Project (TCAP) field campaign will provide a detailed set of observations with which to (1) perform radiative and cloud condensation nuclei (CCN) closure studies, (2) evaluate a new retrieval algorithm for aerosol optical depth (AOD) in the presence of clouds using passive remote sensing, (3) extend a previously developed technique to investigate aerosol indirect effects, and (4) evaluate the performance of a detailed regional-scale model and a more parameterized global-scale model in simulating particle activation and AOD associated with the aging of anthropogenic aerosols. To meet these science objectives, the Atmospheric Radiation Measurement (ARM) Climate Research Facility will deploy the ARM Mobile Facility (AMF) and the Mobile Aerosol Observing System (MAOS) on Cape Cod, Massachusetts, for a 12-month period starting in the summer of 2012 in order to quantify aerosol properties, radiation, and cloud characteristics at a location subject to both clear and cloudy conditions, and clean and polluted conditions. These observations will be supplemented by two aircraft intensive observation periods (IOPs), one in the summer and a second in the winter. Each IOP will deploy one, and possibly two, aircraft depending on available resources. The first aircraft will be equipped with a suite of in situ instrumentation to provide measurements of aerosol optical properties, particle composition and direct-beam irradiance. The second aircraft will fly directly over the first and use a multi-wavelength high spectral resolution lidar (HSRL) and scanning polarimeter to provide continuous optical and cloud properties in the column below.

Berkowitz, CM; Berg, LK; Cziczo, DJ; Flynn, CJ; Kassianov, EI; Fast, JD; Rasch, PJ; Shilling, JE; Zaveri, RA; Zelenyuk, A; Ferrare, RA; Hostetler, CA; Cairns, B; Russell, PB; Ervens, B

2011-07-27T23:59:59.000Z

Note: This page contains sample records for the topic "oscillating water column" 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

A double-frequency dwarf nova oscillation  

E-Print Network [OSTI]

We have detected coherent oscillations (``dwarf nova oscillations'') in Hubble Space Telescope spectra of the dwarf nova OY Car. The oscillations were seen towards the end of a superoutburst of OY Car. The oscillations are extraordinary compared to the many other examples in the literature for two reasons. First, their amplitude is large, with a peak-to-peak variation of 8 to 20% of the total flux over the range 1100 to 2500A. However, most remarkably we find that there are two components present simultaneously. Both have periods close to 18sec (equivalent to 4800 cycles/day) but they are separated by 57.7+/-0.5 cycles/day. The lower frequency component of the pair has a strong second harmonic while its companion, which has about twice its amplitude, does not. The oscillation spectra appear hotter than the mean spectrum and approximately follow the continuum distribution of a black-body with a temperature in the range 30,000 to 50,000K. We tentatively suggest that the weaker non-sinusoidal component could represent the rotation of the white dwarf, although we have been unable to recover any such signal in quiescent data.

T. R. Marsh; Keith Horne

1998-06-02T23:59:59.000Z

302

Autoresonance energy transfer versus localization in weakly coupled oscillators  

E-Print Network [OSTI]

In this paper we investigate the distribution of energy between weakly coupled linear and nonlinear oscillators in a two-degree-of-freedom (2D) system. Two classes of problems are studied analytically and numerically: (1) a periodic force with constant frequency is applied to the nonlinear (Duffing) oscillator with slowly time-decreasing linear stiffness; (2) the time-independent nonlinear oscillator is excited by a force with slowly increasing frequency. In both cases, stiffness of the attached linear oscillator and linear coupling remain constant, and the system is initially engaged in resonance. This paper demonstrates that in the systems of the first type autoresonance (AR) occurs in both oscillators while in systems of the second type AR occurs only in the excited nonlinear oscillator but the coupled linear oscillator exhibits small bounded oscillations. Considering slow detuning, we obtain explicit asymptotic approximations for the amplitudes and the phases of oscillations close to exact (numerical) results.

Agnessa Kovaleva; Leonid Manevitch

2014-10-22T23:59:59.000Z

303

MiniBooNE Oscillation Results 2011  

SciTech Connect (OSTI)

The MiniBooNE neutrino oscillation search experiment at Fermilab has recently updated results from a search for {bar {nu}}{sub {mu}} {yields} {bar {nu}}{sub e} oscillations, using a data sample corresponding to 8.58 x 10{sup 20} protons on target in anti-neutrino mode. This high statistics result represent an increase in statistics of 52% compared to result published in 2010. An excess of 57.7 {+-} 28.5 events is observed in the energy range 200 MeV < E{sub {nu}} < 3000 MeV. The data favor LSND-like {bar {nu}}{sub {mu}} {yields} {bar {nu}}{sub e} oscillations over a background only hypothesis at 91.1% confidence level in the energy range 475 < E{sub {nu}} < 3000 MeV.

Djurcic, Zelimir

2012-01-01T23:59:59.000Z

304

Unsteady aerodynamic analysis of subsonic oscillating cascade  

SciTech Connect (OSTI)

This paper describes the development of the source-doublet-based potential paneling method for oscillating cascade unsteady aerodynamic load predictions. By using the integral influence coefficient method and by using the interblade phase angles, the unsteady loads on an oscillating cascade can be accurately predicted at a minimum cost. As the grids are placed only on the blade surfaces, the blades are allowed to vibrate without grid deformation problems. Four notable subsonic oscillating cascade test cases that cover most important parameters, e.g., blade geometry, interblade phase angle, flow coefficient, flow speed, frequency, etc., are studied in this paper. The agreement between the present solutions and other numerical/experimental results demonstrates the robustness of the present model. Applicability of the method for realistic compressible flow cascades is also discussed.

Chen, S.H.; Eastland, A.H.; Jackson, E.D. (Rockwell International Corp., Canoga Park, CA (United States). Rocketdyne Div.)

1994-07-01T23:59:59.000Z

305

Harmonic oscillator in presence of nonequilibrium environment  

SciTech Connect (OSTI)

Based on a microscopic Hamiltonian picture where the system is coupled with the nonequilibrium environment, comprising of a set of harmonic oscillators, the Langevin equation with proper microscopic specification of Langevin force is formulated analytically. In our case, the reservoir is perturbed by an external force, either executing rapid or showing periodic fluctuations, hence the reservoir is not in thermal equilibrium. In the presence of external fluctuating force, using Shapiro-Loginov procedure, we arrive at the linear coupled first order differential equations for the two-time correlations and examine the time evolution of the same considering the system as a simple harmonic oscillator. We study the stochastic resonance phenomena of a Kubo-type oscillator (assumed to be the system) when the bath is modulated by a periodic force. The result(s) obtained here is of general significance and can be used to analyze the signature of stochastic resonance.

Chaudhuri, Jyotipratim Ray [Department of Physics, Katwa College, Katwa, Burdwan 713130 (India); Chaudhury, Pinaki [Department of Chemistry, University of Culcutta, Kolkata 700009 (India); Chattopadhyay, Sudip [Department of Chemistry, Bengal Engineering and Science University, Shibpur, Howrah 711103 (India)

2009-06-21T23:59:59.000Z

306

Brownian parametric quantum oscillator with dissipation  

Science Journals Connector (OSTI)

We study the quantum fluctuational properties of a parametric oscillator with and without coupling to an Ohmic environment. After considering the momentum and coordinate variances as a function of initial squeezing for the undamped dynamics, we invoke the functional integral method to derive the fully exact reduced density matrix for parametric dissipative quantum Brownian motion, covering the whole temperature regime from T=0 up to the classical limit at room temperatures. Moreover, we present the exact result for the quantum master equation for both the density matrix and the corresponding Wigner function. The time evolution of the covariance matrix elements of damped quantum fluctuations is studied numerically. These variances undergo within the regime of global stability asymptotic, periodic oscillations. As an interesting result, we find that the minima of these oscillations fall below the corresponding thermal equilibrium values.

Christine Zerbe and Peter Hänggi

1995-08-01T23:59:59.000Z

307

BNL | Baryonic Oscillation Spectroscopic Survey (BOSS)  

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

Baryonic Oscillation Spectroscopic Survey (BOSS) Baryonic Oscillation Spectroscopic Survey (BOSS) sloan telescope The 2.5-meter Sloan telescope in New Mexico Mapping the Luminous Universe How are galaxies clustered together? What is fueling the accelerating expansion of the universe? Just what is dark energy? These are the big questions that scientists working at the Baryon Oscillation Spectroscopic Survey (BOSS) are asking. Brookhaven National Lab is a member of BOSS, the largest of the four surveys that make up the Sloan Digital Sky Survey III, which maps the sky over the Northern Hemisphere with New Mexico's 2.5-meter Sloan telescope in an attempt to define dark energy and measure its effects. Building on the legacy of the Sloan Digital Sky Survey (SDSS) and SDSS-II, the SDSS-III collaboration is working to map the Milky Way, search

308

Modeling water column structure and suspended particulate matter on the Middle Atlantic continental shelf  

E-Print Network [OSTI]

that contributed to the evolution of observed thermal structure and resuspension of particulate matter during resuspension processes. It is concluded that wave-current bottom shear stress was clearly the most important process for sediment resuspension during and following both hurricanes. Discrepancies between modeled

Chang, Grace C.

309

Quantification of sediment bed - water column exchange processes in the South San Francisco Bay estuary  

E-Print Network [OSTI]

single large ebb tide of the low energy tidal cycle (nearperiod the tides move into the lower energy phase and theare low energy, marked by two weak tides with small depth

Gladding, Steven Michael

2011-01-01T23:59:59.000Z

310

Water column signatures of the NW German backbarrier tidal flats: Sources and processes  

E-Print Network [OSTI]

be neglected when performing elemental mass-balance calculations on the Wadden Sea environment. Reference: [1

Oldenburg, Carl von Ossietzky Universität

311

Biological processes in the water column of the South Atlantic bight  

SciTech Connect (OSTI)

Progress is reported on research conducted during 1979 on the biological oceanography of the South Atlantic Bight. The presentation consists of a number of published articles and abstracts of oral presentations. (ACR)

Paffenhoefer, G.A.; Yoder, J.A.

1980-01-31T23:59:59.000Z

312

Quantification of sediment bed - water column exchange processes in the South San Francisco Bay estuary  

E-Print Network [OSTI]

a Tracer of Short-Term Sediment Deposition and ResuspensionMeasurement of Suspended Sediment." Geological Surveyand Jaffe, B. E. (2008). "Sediment Deposition, Erosion, and

Gladding, Steven Michael

2011-01-01T23:59:59.000Z

313

Oxygen Utilization and Organic Carbon Remineralization in the Upper Water Column of the Pacific Ocean  

Science Journals Connector (OSTI)

As a part of the JGOFS synthesis and modeling project, researchers have been working to synthesize the WOCE/JGOFS/DOE/NOAA global CO2...survey data to better understand carbon cycling processes in the oceans. Wor...

Richard A. Feely; Christopher L. Sabine; Reiner Schlitzer…

314

Particle flux transformation in the mesopelagic water column: process analysis and global balance  

E-Print Network [OSTI]

. 6 Fractal scaling has been used in order to describe these relationships (Jackson 1998; Li and Logan 1995). 1.1.2. Mathematical description of particle size spectrum Particle abundances as a function of size can be described using a size... of the system and will be the common descriptor used in the following work. 1.1.3. Mathematical description of particle fractal dimension The relationships between fractal geometry and the exponents for the diameter in the power relationships between...

Guidi, Lionel

2008-10-10T23:59:59.000Z

315

Water column oxygen demand and sediment oxygen flux: patterns of oxygen depletion in tidal creeks  

Science Journals Connector (OSTI)

Five study sites were chosen in Futch Creek, Hewletts Creek and Pages Creek,...1). Sites were chosen to reflect a range in the values of dissolved oxygen levels, chlorophyll a concentrations and nutrient (nitroge...

Tara A. MacPherson; Lawrence B. Cahoon; Michael A. Mallin

2007-07-01T23:59:59.000Z

316

Water Efficiency  

Energy Savers [EERE]

Wheeler - Water Savers, LLC * fwheeler@watersaversllc.com Topics * Performance contracting analysis * Water industry terms * Federal reduction goals * Water balance * Water...

317

Neutrino oscillations in a turbulent plasma  

SciTech Connect (OSTI)

A new model for the joint neutrino flavor and plasma oscillations is introduced, in terms of the dynamics of the neutrino flavor polarization vector in a plasma background. Fundamental solutions are found for both time-invariant and time-dependent media, considering slow and fast variations of the electron plasma density. The model is shown to be described by a generalized Hamiltonian formalism. In the case of a broad spectrum of electron plasma waves, a statistical approach indicates the shift of both equilibrium value and frequency oscillation of flavor coherence, due to the existence of a turbulent plasma background.

Mendonça, J. T. [Instituto de Física, Universidade de São Paulo, São Paulo, SP, CEP 05508-090 Brazil and IPFN, Instituto Superior Técnico, 1049-001 Lisboa (Portugal)] [Instituto de Física, Universidade de São Paulo, São Paulo, SP, CEP 05508-090 Brazil and IPFN, Instituto Superior Técnico, 1049-001 Lisboa (Portugal); Haas, F. [Departamento de Física, Universidade Federal do Paraná, Curitiba PR, CEP 81531-990 (Brazil)] [Departamento de Física, Universidade Federal do Paraná, Curitiba PR, CEP 81531-990 (Brazil)

2013-07-15T23:59:59.000Z

318

Single-ion nonlinear mechanical oscillator  

SciTech Connect (OSTI)

We study the steady-state motion of a single trapped ion oscillator driven to the nonlinear regime. Damping is achieved via Doppler laser cooling. The ion motion is found to be well described by the Duffing oscillator model with an additional nonlinear damping term. We demonstrate here the unique ability of tuning both the linear as well as the nonlinear damping coefficients by controlling the laser-cooling parameters. Our observations pave the way for the investigation of nonlinear dynamics on the quantum-to-classical interface as well as mechanical noise squeezing in laser-cooling dynamics.

Akerman, N.; Kotler, S.; Glickman, Y.; Dallal, Y.; Keselman, A.; Ozeri, R. [Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100 (Israel)

2010-12-15T23:59:59.000Z

319

Neutrino Oscillations, Neutrinoless Double Beta Decay  

Science Journals Connector (OSTI)

We review the experimental evidence for neutrino mixing and neutrino mass. Searches for possible branches into heavy neutrinos do not reveal evidence for static mixing with branching ratios larger than 10?4 to 10?6. Similarly neutrino oscillation experiments show no evidence for dynamic mixing in various oscillation channels. Stringent limits for ? e disappearance from a recent reactor experiment are presented. Results from neutrinoless double beta decay provide sensitive test for Majorana mass and right?hand couplings the present limits being 3–10 eV and 10?5 respectively.

F. Boehm

1982-01-01T23:59:59.000Z

320

Oscillation damping of chiral string loops  

E-Print Network [OSTI]

Chiral cosmic string loop tends to the stationary (vorton) configuration due to the energy loss into the gravitational and electromagnetic radiation. We describe the asymptotic behaviour of near stationary chiral loops and their fading to vortons. General limits on the gravitational and electromagnetic energy losses by near stationary chiral loops are found. For these loops we estimate the oscillation damping time. We present solvable examples of gravitational radiation energy loss by some chiral loop configurations. The analytical dependence of string energy with time is found in the case of the chiral ring with small amplitude radial oscillations.

Eugeny Babichev; Vyacheslav Dokuchaev

2002-04-26T23:59:59.000Z

Note: This page contains sample records for the topic "oscillating water column" 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

Energy Ambiguity and the Inductive Rail Oscillator  

Science Journals Connector (OSTI)

In electric or mixed electric-mechanic systems the distinction between potential and kinetic energy is not as clear as in purely mechanical systems. A solution for the motion of an inductively loaded rail generator is presented. In this case the magnetic fieldenergy (½)Li 2 can be written formally in terms of a potential energy while physically it is something different. The analogy between mechanical and electric oscillators has limits and harmonic oscillators can operate without potential energy both of which must be pointed out by physics teachers.

Patrick C. Hecking

2007-01-01T23:59:59.000Z

322

2, 10971130, 2002 Retrieval of water  

E-Print Network [OSTI]

ACPD 2, 1097­1130, 2002 Retrieval of water vapor columns R. Lang et al. Title Page Abstract, Amsterdam, The Netherlands 2 SRON National Institute for Space Research, Utrecht, The Netherlands 3 Department of Physics and Astronomy, Vrije Universiteit, Amsterdam, The Netherlands Received: 20 June 2002

Paris-Sud XI, Université de

323

Enhanced rate of gas hydrate formation in a fixed bed column filled with sand compared to a stirred vessel  

Science Journals Connector (OSTI)

The performance of two gas/liquid contact modes was evaluated in relation to the rate of gas hydrate formation. Hydrate formation experiments were conducted for several gas mixtures relevant to natural gas hydrate formation in the earth (CH4, CH4/C3H8, CH4/C2H6 and CH4/C2H6/C3H8) and two CO2 capture and storage (CO2, CO2/H2/C3H8). One set of experiments was conducted in a bed of silica sand, saturated with water (fixed fed column) while the other experiment was conducted in a stirred vessel for each gas/gas mixture. Both sets of experiments were conducted at a constant temperature. The rate of hydrate formation is customarily correlated with the rate of gas consumption. The results show that the rate of hydrate formation in the fixed bed column is significantly greater and thereby resulted in a higher percent of water conversion to hydrate in lesser reaction time for all the systems studied.

Praveen Linga; Nagu Daraboina; John A. Ripmeester; Peter Englezos

2012-01-01T23:59:59.000Z

324

Level: National Data; Row: NAICS Codes; Column: Energy Sources;  

Gasoline and Diesel Fuel Update (EIA)

Next MECS will be fielded in 2015 Table 3.4 Number of Establishments by Fuel Consumption, 2010; Level: National Data; Row: NAICS Codes; Column: Energy Sources; Unit: Establishment Counts. Any NAICS Energy Net Residual Distillate LPG and Coke Code(a) Subsector and Industry Source(b) Electricity(c) Fuel Oil Fuel Oil(d) Natural Gas(e) NGL(f) Coal and Breeze Other(g) Total United States 311 Food 13,269 13,265 144 2,416 10,373 4,039 64 7 1,538 3112 Grain and Oilseed Milling 602 602 9 204 489 268 30 0 140 311221 Wet Corn Milling 59 59 W 28 50 36 15 0 29 31131 Sugar Manufacturing 73 73 3 36 67 12 W 7 14 3114 Fruit and Vegetable Preserving and Specialty Foods 987 987 17 207 839 503 W 0 210 3115 Dairy Products 998 998 12 217 908

325

Level: National Data; Row: NAICS Codes; Column: Floorspace and Buildings;  

Gasoline and Diesel Fuel Update (EIA)

9.1 Enclosed Floorspace and Number of Establishment Buildings, 2010; 9.1 Enclosed Floorspace and Number of Establishment Buildings, 2010; Level: National Data; Row: NAICS Codes; Column: Floorspace and Buildings; Unit: Floorspace Square Footage and Building Counts. Approximate Approximate Average Enclosed Floorspace Average Number Number of All Buildings Enclosed Floorspace of All Buildings of Buildings Onsite NAICS Onsite Establishments(b) per Establishment Onsite per Establishment Code(a) Subsector and Industry (million sq ft) (counts) (sq ft) (counts) (counts) Total United States 311 Food 1,115 13,271 107,293.7 32,953 3.1 3112 Grain and Oilseed Milling 126 602 443,178.6 5,207 24.8 311221 Wet Corn Milling 14 59 270,262.7 982 18.3 31131 Sugar Manufacturing

326

Kinetic azeotropy and design of reactive distillation columns  

SciTech Connect (OSTI)

The reactive fixed points in the distillation maps of a reactive distillation column (RDC) with kinetically controlled reactions are identified and their role in deciding the design feasibility has been elucidated. The fixed points at which both reaction and distillation vectors have zero magnitudes correspond to the equilibrium fixed point. It is known that the relative positions of these points for the rectifying and stripping sections determine the value of the minimum reflux ratio. However, apart from these fixed points, there are certain fixed points in the distillation map at which, though the reaction and distillation vectors have nonzero magnitudes, they nullify the effects of each other. These points correspond to the kinetic fixed points and have a special significance. Their positions have direct influence on the feasible product composition. A simple example of an ideal ternary system undergoing a reaction 2B {longleftrightarrow} A + c has been illustrated to show the importance of kinetic azeotropy in the design aspects of RDC.

Mahajani, S.M. [Monash Univ., Clayton, Victoria (Australia). Dept. of Chemical Engineering] [Monash Univ., Clayton, Victoria (Australia). Dept. of Chemical Engineering

1999-01-01T23:59:59.000Z

327

Transient simulation for large scale flow in bubble columns  

Science Journals Connector (OSTI)

Abstract The transient simulation of large scale bubbly flow in bubble columns using the unsteady Reynolds averaged Navier Stokes (URANS) equations is investigated in the present paper. An extensive set of bubble forces is used with different models for the bubble induced turbulence. Criteria are given to assess the independence of the simulation time and the time step length. Using these criteria it is shown that a simulation time, time step length and mesh independent solution can be obtained for complex bubbly flows using URANS equations under certain requirements. With the obtained setup the contribution of the resolved turbulence to the total turbulence and the influence of the bubble induced turbulence modeling on the resolved turbulence is investigated. Further, it is pointed out that the virtual mass force is not negligible. The simulations are compared to data from the literature at two different superficial velocities, which cover monodisperse and polydisperse bubbly flows.

T. Ziegenhein; R. Rzehak; D. Lucas

2015-01-01T23:59:59.000Z

328

Chemical, Electrochemical and Spectral Characterization of Water Leachates from Biomass  

Science Journals Connector (OSTI)

(10) During washing, a fraction of organic compounds and inorganic ions enter the water. ... After being allowed to air dry in the field, all samples were cut with a herb shredder and then sieved to 280–450 ?m. ... The light gray column represents the calculated value of the weight of K removed from a 12.5-g biomass sample, and the gray column represents the measured value of K in 1.0 L of leachate. ...

Lei Deng; Defu Che

2012-11-08T23:59:59.000Z

329

Doppler effects of an oscillating line source in shear flow with a free surface  

Science Journals Connector (OSTI)

Abstract The linearised water-wave radiation problem for the oscillating 2D submerged source in an inviscid shear flow with a free surface is investigated analytically. There is a nonzero surface velocity. The depth is infinite and the vorticity is uniform. The amplitudes radiated from the source are calculated analytically. Due to Doppler effects, there may be up to four different emitted waves, and there is resonance with zero group velocity and infinite amplitude.

Peder A. Tyvand; Mikkel Elle Lepperød

2014-01-01T23:59:59.000Z

330

A van der Pol coupled-oscillator model as a basis for developing a system for suppressing MHD instabilities in a tokamak  

SciTech Connect (OSTI)

The main parameters of tokamak discharges are known to be limited by large-scale MHD instabilities. Sometimes, the instabilities lead to a rapid (on time scales of tens of microseconds) disruption of the discharge current and to the release of all the energy stored in the plasma column at the discharge chamber wall. This process, which is called the disruptive instability, may have irreversible catastrophic consequences for the operation of a fusion reactor. In the present paper, a study is made of the dynamics of self-oscillations in systems of two and six van der Pol coupled oscillators. A van der Pol coupled-oscillator model is used to develop a multivariable feedback controller based on the combined principle of compensating for internal cross feedbacks within the object and introducing damping feedbacks in each control channel. By using mathematical simulation methods, it is shown that the controller designed guarantees the suppression of self-oscillations in a system of van der Pol oscillators over a fairly broad range of parameters of the object under control (and thereby provides the structural stability of the object). The nonlinear control system model makes it possible to suppress coupled MHD perturbations developing in a tokamak plasma.

Semenov, I. B. [Russian Research Centre Kurchatov Institute, Nuclear Fusion Institute (Russian Federation); Mitrishkin, Yu. V. [Russian Academy of Sciences, Institute of Control Sciences (Russian Federation); Subbotin, A. A. [Russian Research Centre Kurchatov Institute, Nuclear Fusion Institute (Russian Federation); Vertinskii, A. G. [Moscow Institute of Physics and Technology (Russian Federation); Marusov, N. L. [Russian Research Centre Kurchatov Institute, Nuclear Fusion Institute (Russian Federation); Sushin, I. S. [Moscow Institute of Physics and Technology (Russian Federation)

2006-02-15T23:59:59.000Z

331

Improving the Performance of a Two-Shell Column with Advanced Control  

E-Print Network [OSTI]

column has yielded stable operation with reduced utility consumption and increased capacity. Prior to the application of advanced controls this column was a plant capacity limit and composition control was very difficult. The advanced controls now... allow composition to be controlled within 15% of setpoint at both ends of the column. specific energy consumption has been reduced significantly, yielding higher potential capacity. The control strategies implemented include analyzer composition...

Morrison, T. A.; Laflamme, D.

332

A study of the self-oscillating jet impingement nozzle  

E-Print Network [OSTI]

wave and flow fluctuations that need no external input. The new oscillating jet when used for impingement surface transport was labeled the Self-Oscillating Jet Impingement Nozzle. The objectives of this research were to characterize the gains in heat...

Chinnock, Paul Scott

1993-01-01T23:59:59.000Z

333

A PLL Design Based on a Standing Wave Resonant Oscillator  

E-Print Network [OSTI]

In this thesis, we present a new continuously variable high frequency standing wave oscillator and demonstrate its use in generating the phase locked clock signal of a digital IC. The ring based standing wave resonant oscillator is implemented...

Karkala, Vinay

2011-10-21T23:59:59.000Z

334

Investigation and Construction of Self-oscillating Systems  

E-Print Network [OSTI]

Self-oscillating reactions have been widely observed and studied since the last century because they exhibit unique behaviors different from the traditional chemical reactions. Self-oscillating systems, such as the Belousov-Zhabotinsky (BZ) reaction...

Wang, Guanqun

2012-07-16T23:59:59.000Z

335

Propulsive performance from oscillating propulsors with spanwise flexibility  

Science Journals Connector (OSTI)

...dimensional oscillating foil propulsion. M.Eng. thesis...Bose, N. 1991 Propulsion from an oscillating...planform. In Proc. Marine Dynamics Conf. 1991...Hydromechanics of swimming propulsion. Part 1. Swimming...Canada, Institute of Marine Dynamics report, no...

1997-01-01T23:59:59.000Z

336

Title of dissertation: SYNCHRONIZATION OF CHAOTIC OPTOELECTRONIC OSCILLATORS  

E-Print Network [OSTI]

ABSTRACT Title of dissertation: SYNCHRONIZATION OF CHAOTIC OPTOELECTRONIC OSCILLATORS: ADAPTIVE channels. Here, using a fiber-optic network of chaotic optoelectronic oscillators, we experimentally on synchronization. Through measurements of the convergence rate to synchronization in networks of optoelectronic

Anlage, Steven

337

Combining Genetic Oscillators and Switches using Evolutionary Algorithms  

E-Print Network [OSTI]

motifs, one toggle switch and one self- sustained oscillator using an evolutionary algorithm, which can]. Of particular interest in biology are those network motifs that produce self-sustained oscillations and bistable

Jin, Yaochu

338

Van der Pol and the history of relaxation oscillations  

E-Print Network [OSTI]

by self-sustained oscillating systems such as a triode circuit. Our aim is to investigate how re- laxation to be experi- mentally observed. Among systems able to present self-sustained oscillations and which were

Boyer, Edmond

339

Striatal origin of the pathologic beta oscillations in Parkinson's disease  

E-Print Network [OSTI]

Enhanced oscillations at beta frequencies (8–30 Hz) are a signature neural dynamic pathology in the basal ganglia and cortex of Parkinson's disease patients. The mechanisms underlying these pathological beta oscillations ...

Boyden, Edward Stuart

340

Oscillation control system for electric motor drive  

DOE Patents [OSTI]

A feedback system for controlling mechanical oscillations in the torsionally complaint drive train of an electric or other vehicle. Motor speed is converted in a processor to estimate state signals in which a plant model which are used to electronically modify thetorque commands applied to the motor.

Slicker, James M. (Union Lake, MI); Sereshteh, Ahmad (Union Lake, MI)

1988-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "oscillating water column" 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

ARITHMETIC OF THE OSCILLATOR REPRESENTATION Michael Harris  

E-Print Network [OSTI]

ARITHMETIC OF THE OSCILLATOR REPRESENTATION Michael Harris §1. Moduli 1.1. Let V = Q2g , and let schemes g N : Ag N [N] - (N-1 T/T)Mg N . Typeset by AMS-TEX 1 #12;2 MICHAEL HARRIS 1.3. Let : Ag N Mg N

Harris, Michael - Institut de Mathématiques de Jussieu, Université Paris 7

342

Resonance energy transport in an oscillator chain  

E-Print Network [OSTI]

We investigate energy transfer and localization in a linear time-invariant oscillator chain weakly coupled to a forced nonlinear actuator. Two types of perturbation are studied: (1) harmonic forcing with a constant frequency is applied to the actuator (the Duffing oscillator) with slowly changing parameters; (2) harmonic forcing with a slowly increasing frequency is applied to the nonlinear actuator with constant parameters. In both cases, stiffness of linear oscillators as well as linear coupling remains constant, and the system is initially engaged in resonance. The parameters of the systems and forcing are chosen to guarantee autoresonance (AR) with gradually increasing energy in the nonlinear actuator. As this paper demonstrates, forcing with constant frequency generates oscillations with growing energy in the linear chain but in the system excited by forcing with slowly time-dependent frequency energy remains localized on the nonlinear actuator whilst the response of the linear chain is bounded. This means that the systems that seem to be almost identical exhibit different dynamical behavior caused by their different resonance properties. Numerical examples a good agreement between exact (numerical) solutions and their asymptotic approximations found by the multiple time scales method.

Agnessa Kovaleva

2015-01-03T23:59:59.000Z

343

Simulated Atlantic Multidecadal Oscillation during the Holocene  

Science Journals Connector (OSTI)

The Atlantic multidecadal oscillation (AMO) and its possible change during the Holocene are examined in this study, using long-term simulations of the earth system model Community Earth System Models (COSMOS). A quasi-persistent ~55–80-yr cycle ...

Wei Wei; Gerrit Lohmann

2012-10-01T23:59:59.000Z

344

Motion from Transient Oscillations Jeffrey E. Boyd  

E-Print Network [OSTI]

Motion from Transient Oscillations Jeffrey E. Boyd Department of Computer Science University of Calgary Calgary AB T2N 1N4 boyd@cpsc.ucalgary.ca James J. Little Department of Computer Science University optical flow algorithms and vPLLs highlighting how the algorithms meet these two #12; Boyd and Little

Boyd, Jeffrey E.

345

A Torsional Oscillator Study Solid Helium  

E-Print Network [OSTI]

and the work presented in it is entirely my own. Where I have consulted the work of others, this is always clearly stated. Signed: Date: 4 #12;Abstract A compound two-mode torsional oscillator is used al and apply the same corrections to their work, finding a decoupling of 0.017% Extensive repair work

Sheldon, Nathan D.

346

Neutrino mixing and oscillations in astrophysical environments  

SciTech Connect (OSTI)

A brief review of the current status of neutrino mixing and oscillations in astrophysical environments, with particular emphasis on the Sun and core-collapse supernovae, is given. Implications of the existence of sterile states which mix with the active neutrinos are discussed.

Balantekin, A. B. [Physics Department, University of Wisconsin, Madison WI 53706 (United States)

2014-05-02T23:59:59.000Z

347

Small Column Ion Exchange at Savannah River Site Technology Readiness Assessment Report  

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

Small Column Ion Exchange Technology at Small Column Ion Exchange Technology at Savannah River Site U.S. Department of Energy Office of Environmental Management Office of Technology Innovation and Development Technology Readiness Assessment Report November 2011 U.S. DOE-EM Office of Technology Innovation and Development November 11, 2011 Small Column Ion Exchange Program Technology Readiness Assessment Page 2 of 112 This page intentionally left blank November 11, 2011 U.S. DOE-EM Office of Technology Innovation and Development Small Column Ion Exchange Program Technology Readiness Assessment Page 3 of 112 APPROVALS ________________________ _ Harry D. Harmon Date

348

Automation of Column-based Radiochemical Separations: A Comparison of Fluidic, Robotic, and Hybrid Architectures  

SciTech Connect (OSTI)

Two automated systems have been developed to perform column-based radiochemical separation procedures. These new systems are compared with past fluidic column separation architectures, with emphasis on setting up samples and columns in parallel, and using disposable components so that no sample contacts any surface that any other sample has contacted. In the first new approach, a general purpose liquid handling robot has been modified and programmed to perform anion exchange separations using 2 mL column bed columns in 6 mL plastic disposable column bodies. In the second new approach, a fluidic system has been developed to deliver clean reagents through disposable manual valves to six disposable columns, with a mechanized fraction collector that positions four rows of six vials below the columns. The samples are delivered to the columns via a manual 3-port valve from disposable syringes. This second approach, a hybrid of fluidic and mechanized components, is simpler and faster in performing anion exchange procedures for the recovery and purification of plutonium from samples.

Grate, Jay W.; O'Hara, Matthew J.; Farawila, Anne F.; Ozanich, Richard M.; Owsley, Stanley L.

2011-09-26T23:59:59.000Z

349

Development of a Fuzzy Logic Controller for a Distillation Column using Rockwell Software .  

E-Print Network [OSTI]

??In this thesis, an alternative control method based on Fuzzy Inference System (FIS) is proposed to keep the product composition of a distillation column constant.… (more)

Nizami, Muhammad

2011-01-01T23:59:59.000Z

350

Integrated Silica-Bead Separation Column for On-Chip LC-ESI  

E-Print Network [OSTI]

area as a 58µm ID capillary. ESI nozzle freestandingESI voltage is on, Cross Section Dimension Equivalent Column ID

He, Qing; Xie, Jun; Tai, Yu-Chong; Miao, Yunan; Lee, Terry D

2004-01-01T23:59:59.000Z

351

E-Print Network 3.0 - activated carbon columns Sample Search...  

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

- School of Physics, University of Sydney Collection: Materials Science ; Physics 6 United States Department of Summary: column is non-zero only in the year of harvest, 2015....

352

E-Print Network 3.0 - absorbing column densities Sample Search...  

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

John - National Radio Astronomy Observatory Collection: Physics 3 Characteristics and energy balance of a plasma column sustained by a surface wave Summary: density distribution...

353

E-Print Network 3.0 - anaerobic aquifer column Sample Search...  

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

Explorit Topic List Advanced Search Sample search results for: anaerobic aquifer column Page: << < 1 2 3 4 5 > >> 1 Biodegradation 11: 107116, 2000. 2001 Kluwer Academic...

354

A new warmstarting strategy for the primal-dual column generation ...  

E-Print Network [OSTI]

Jun 24, 2012 ... Abstract: This paper presents a new warmstarting technique in the context of a primal-dual column generation method applied to solve a ...

Jacek Gondzio

2012-06-24T23:59:59.000Z

355

Injection locked oscillator system for pulsed metal vapor lasers  

DOE Patents [OSTI]

An injection locked oscillator system for pulsed metal vapor lasers is disclosed. The invention includes the combination of a seeding oscillator with an injection locked oscillator (ILO) for improving the quality, particularly the intensity, of an output laser beam pulse. The present invention includes means for matching the first seeder laser pulses from the seeding oscillator to second laser pulses of a metal vapor laser to improve the quality, and particularly the intensity, of the output laser beam pulse.

Warner, Bruce E. (Livermore, CA); Ault, Earl R. (Dublin, CA)

1988-01-01T23:59:59.000Z

356

The Large N Harmonic Oscillator as a String Theory  

E-Print Network [OSTI]

We propose a duality between the large-N gauged harmonic oscillator and a novel string theory in two dimensions.

Nissan Itzhaki; John McGreevy

2004-08-24T23:59:59.000Z

357

Electron Plasma Oscillations Associated with Type III Radio Bursts  

Science Journals Connector (OSTI)

...interactions of the plasma oscillations with...propagat-ing electron plasma oscillations. Radia-tion...frequencies (5 1 Mhz) the harmonic radiation...Since the electron plasma oscillations )N...about 10 mv m-1 or larger are required to explain...and the solid black area inyears of measurements...

DONALD A. GURNETT; ROGER R. ANDERSON

1976-12-10T23:59:59.000Z

358

Time-domain Dynamics and Stability Analysis of Optoelectronic Oscillators  

E-Print Network [OSTI]

Time-domain Dynamics and Stability Analysis of Optoelectronic Oscillators based on Whispering and Yanne K. Chembo Optoelectronic oscillators (OEOs) are microwave photonics systems in- tended to generate in "" #12;1 Introduction The optoelectronic oscillator (OEO) is nowadays considered as one of the most

Paris-Sud XI, Université de

359

Track 2: Sustainable Energy I. Renewable Energy: Wind and Wave  

E-Print Network [OSTI]

. Pulse uses an oscillating hydrofoil for energy capture: horizontal wing-shaped blades move up and down in the water column, much like a whale's tail. This oscillating motion is converted to electricity through

360

DUST EXTINCTION BIAS IN THE COLUMN DENSITY DISTRIBUTION OF GAMMA-RAY BURSTS: HIGH COLUMN DENSITY, LOW-REDSHIFT GRBs ARE MORE HEAVILY OBSCURED  

SciTech Connect (OSTI)

The afterglows of gamma-ray bursts (GRBs) have more soft-X-ray absorption than expected from the foreground gas column in the Galaxy. While the redshift of the absorption can in general not be constrained from current X-ray observations, it has been assumed that the absorption is due to metals in the host galaxy of the GRB. The large sample of X-ray afterglows and redshifts now available allows the construction of statistically meaningful distributions of the metal column densities. We construct such a sample and show, as found in previous studies, that the typical absorbing column density (N{sub H{sub X}}) increases substantially with redshift, with few high column density objects found at low-to-moderate redshifts. We show, however, that when highly extinguished bursts are included in the sample, using redshifts from their host galaxies, high column density sources are also found at low-to-moderate redshift. We infer from individual objects in the sample and from observations of blazars that the increase in column density with redshift is unlikely to be related to metals in the intergalactic medium or intervening absorbers. Instead we show that the origin of the apparent increase with redshift is primarily due to dust extinction bias: GRBs with high X-ray absorption column densities found at z {approx}< 4 typically have very high dust extinction column densities, while those found at the highest redshifts do not. It is unclear how such a strongly evolving N{sub H{sub X}}/A{sub V} ratio would arise, and based on current data, remains a puzzle.

Watson, Darach [Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen O (Denmark); Jakobsson, Pall, E-mail: darach@dark-cosmology.dk, E-mail: pja@raunvis.hi.is [Centre for Astrophysics and Cosmology, Science Institute, University of Iceland, Dunhaga 5, IS-107 Reykjavik (Iceland)

2012-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "oscillating water column" 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

Separation and Detection of Sulfur-Containing Anions Using Single-Column Ion Chromatography  

Science Journals Connector (OSTI)

......derivatized. With the resin-based column...states or complex ions. Sulfide is...Systems with resin-based anion exchange (RBAX) columns...for which ion-exchange H...detectors. In addition to electrical...since its early demonstration. It has been......

Richard E. Poulson; Harry M. Borg

1987-09-01T23:59:59.000Z

362

A dusty plasma device for producing extended, steady state, magnetized, dusty plasma columns  

E-Print Network [OSTI]

A dusty plasma device for producing extended, steady state, magnetized, dusty plasma columns Wenjun with an existing Q machine, to produce extended, steady state, magnetized plasma columns. The dusty plasma device (DPD) is to be used for the investigation of waves in dusty plasmas and of other plasma/dust aspects

Merlino, Robert L.

363

Light-scattering properties of plate and column ice crystals generated in a laboratory cold chamber  

E-Print Network [OSTI]

with a diode laser beam. This cloud chamber produces distinct plate and hollow column ice crystal types. The cloud chamber developed at the Desert Re- search Institute has been used to produce ice clouds composedLight-scattering properties of plate and column ice crystals generated in a laboratory cold chamber

Liou, K. N.

364

JOURNAL OF STRUCTURAL ENGINEERING / OCTOBER 2000 / 1113 SEISMIC RESPONSE OF EXTERIOR RC COLUMN-TO-STEEL  

E-Print Network [OSTI]

JOURNAL OF STRUCTURAL ENGINEERING / OCTOBER 2000 / 1113 SEISMIC RESPONSE OF EXTERIOR RC COLUMN-TO-STEEL: The inelastic cyclic response of hybrid connections consisting of RC columns and steel beams (RCS) is studied of the steel beams, steel band plates or cover plates surrounding the joint region, steel fiber concrete

Parra-Montesinos, Gustavo J.

365

A Novel Cross-Flow Cascade Packed Column Design and Simulation  

Science Journals Connector (OSTI)

A Novel Cross-Flow Cascade Packed Column Design and Simulation ... Thus the abundant area for gas flow will decrease gas-phase pressure drop, and it can allow operation at gas velocities above the flooding points of countercurrent packed columns. ...

Fengrong Chen; Rongqi Zhou; Zhanting Duan; Yumei Liu

1999-07-03T23:59:59.000Z

366

Validation of Ozone Monitoring Instrument nitrogen dioxide columns E. A. Celarier,1  

E-Print Network [OSTI]

Validation of Ozone Monitoring Instrument nitrogen dioxide columns E. A. Celarier,1 E. J. Brinksma the standard nitrogen dioxide (NO2) data product (Version 1.0.), which is based on measurements made), Validation of Ozone Monitoring Instrument nitrogen dioxide columns, J. Geophys. Res., 113, D15S15, doi:10

367

Use of Two Distillation Columns in Systems with Maximum Temperature Limitations  

E-Print Network [OSTI]

Use of Two Distillation Columns in Systems with Maximum Temperature Limitations Rebecca H. Masel, Pennsylvania 18015, United States ABSTRACT: Maximum temperature limitations are encountered in distillation of the bottoms product fixes the column base pressure and, hence, the condenser pressure. The distillate

Gilchrist, James F.

368

Dividing wall columns for heterogeneous azeotropic distillation Quang-Khoa Le1  

E-Print Network [OSTI]

Dividing wall columns for heterogeneous azeotropic distillation Quang-Khoa Le1 , Ivar J. Halvorsen2 of this work is to implement heterogeneous azeotropic distillation schemes in a dividing wall column (DWC distillation, Petlyuk arrangement, energy saving. 1. Introduction Distillation is one of the most energy

Skogestad, Sigurd

369

Cyclotron waves in a non-neutral plasma column Daniel H. E. Dubin  

E-Print Network [OSTI]

plasma column with near-Maxwellian velocity distributions. We focus on the z-independent component#12;Cyclotron waves in a non-neutral plasma column Daniel H. E. Dubin Department of Physics April 2013; published online 25 April 2013) A kinetic theory of linear electrostatic plasma waves

California at San Diego, University of

370

Cyclotron Waves in a Nonneutral Plasma Column Daniel H.E. Dubin  

E-Print Network [OSTI]

plasma column with near-Maxwellian velocity distributions. We focus on the z-independent componentCyclotron Waves in a Nonneutral Plasma Column Daniel H.E. Dubin Department of Physics, University of California at San Diego, La Jolla, California 92093 (Dated: February 22, 2013 [submitted to Phys. Plasmas

California at San Diego, University of

371

Cyclotron waves in a non-neutral plasma column Daniel H. E. Dubin  

E-Print Network [OSTI]

plasma column with near-Maxwellian velocity distributions. We focus on the z-independent componentCyclotron waves in a non-neutral plasma column Daniel H. E. Dubin Citation: Phys. Plasmas 20. Additional information on Phys. Plasmas Journal Homepage: http://pop.aip.org/ Journal Information: http

California at San Diego, University of

372

An Evaluation of Microextraction/Capillary Column Gas Chromatography for Monitoring Industrial Outfalls  

Science Journals Connector (OSTI)

......Microextraction/Capillary Column Gas Chromatography for Monitoring...for environmental and production analyses. Gary Olsen...both environmental and production lab activities. Daniel...and capillary-column gas chromatography techniques...because of its lower cost and more desirable maintenance......

Daniel R. Thielen; Gary Olsen; Abram Davis; Edward Bajor; John Stefanovski; John Chodkowski

1987-01-01T23:59:59.000Z

373

Sorption of four triarylmethane dyes in a sandy soil determined by batch and column experiments  

E-Print Network [OSTI]

Sorption of four triarylmethane dyes in a sandy soil determined by batch and column experiments for their suitability as hydrological tracers. Sorption is one of the limiting factors for the suitability of a dye tracer. In this study we examined the sorption of four dyes to a sandy soil using batch and column

Flury, Markus

374

E-Print Network 3.0 - argon plasma column Sample Search Results  

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

surface wave produced plasma column obtained at 40 mtorr of argon in a 25 mm i.d. pyrex tube... shows the plasma column obtained at 40 mtorr of argon in a 25 mm i.d. tube with 80 W...

375

Griffith 4/2004 Small Scale His Tag Enzyme Purification with TALON Affinity Column Resin  

E-Print Network [OSTI]

Griffith 4/2004 Small Scale His Tag Enzyme Purification with TALON Affinity Column Resin Overview: This is a small scale method for purifying a His-tagged protein using commercial affinity resin. Materials: TALON rotor, at 18 K rpm) at 4 °C. 7. Save supernatant fraction for column purification. Supernatant can

Doering, Tamara

376

Level: National Data; Row: NAICS Codes; Column: Energy Sources  

U.S. Energy Information Administration (EIA) Indexed Site

3.4 Number of Establishments by Fuel Consumption, 2006; 3.4 Number of Establishments by Fuel Consumption, 2006; Level: National Data; Row: NAICS Codes; Column: Energy Sources Unit: Establishment Counts. Any NAICS Energy Net Residual Distillate LPG and Coke Code(a) Subsector and Industry Source(b) Electricity(c) Fuel Oil Fuel Oil(d) Natural Gas(e) NGL(f) Coal and Breeze Other(g) Total United States 311 Food 14,128 14,113 326 1,462 11,395 2,920 67 13 1,240 3112 Grain and Oilseed Milling 580 580 15 174 445 269 35 0 148 311221 Wet Corn Milling 47 47 W 17 44 19 18 0 18 31131 Sugar Manufacturing 78 78 11 43 61 35 26 13 45 3114 Fruit and Vegetable Preserving and Specialty Food 1,125 1,125 13 112 961 325 W 0 127 3115 Dairy Product 1,044 1,044 25 88 941 147 W 0 104 3116 Animal Slaughtering and Processing

377

Level: National Data; Row: NAICS Codes; Column: Energy Sources;  

Gasoline and Diesel Fuel Update (EIA)

4.4 Number of Establishments by Offsite-Produced Fuel Consumption, 2010; 4.4 Number of Establishments by Offsite-Produced Fuel Consumption, 2010; Level: National Data; Row: NAICS Codes; Column: Energy Sources; Unit: Establishment Counts. Any NAICS Energy Residual Distillate LPG and Coke Code(a) Subsector and Industry Source(b) Electricity(c) Fuel Oil Fuel Oil(d) Natural Gas(e) NGL(f) Coal and Breeze Other(g) Total United States 311 Food 13,269 13,265 144 2,413 10,373 4,039 64 W 1,496 3112 Grain and Oilseed Milling 602 602 9 201 489 268 30 0 137 311221 Wet Corn Milling 59 59 W 26 50 36 15 0 28 31131 Sugar Manufacturing 73 73 3 36 67 12 11 W 11 3114 Fruit and Vegetable Preserving and Specialty Foods 987 987 17 207 839 503 W 0 207 3115 Dairy Products 998 998 12 217 908 161 W 0 79 3116 Animal Slaughtering and Processing

378

Micro-miniature gas chromatograph column disposed in silicon wafers  

DOE Patents [OSTI]

A micro-miniature gas chromatograph column is fabricated by forming matching halves of a circular cross-section spiral microcapillary in two silicon wafers and then bonding the two wafers together using visual or physical alignment methods. Heating wires are deposited on the outside surfaces of each wafer in a spiral or serpentine pattern large enough in area to cover the whole microcapillary area inside the joined wafers. The visual alignment method includes etching through an alignment window in one wafer and a precision-matching alignment target in the other wafer. The two wafers are then bonded together using the window and target. The physical alignment methods include etching through vertical alignment holes in both wafers and then using pins or posts through corresponding vertical alignment holes to force precision alignment during bonding. The pins or posts may be withdrawn after curing of the bond. Once the wafers are bonded together, a solid phase of very pure silicone is injected in a solution of very pure chloroform into one end of the microcapillary. The chloroform lowers the viscosity of the silicone enough that a high pressure hypodermic needle with a thumbscrew plunger can force the solution into the whole length of the spiral microcapillary. The chloroform is then evaporated out slowly to leave the silicone behind in a deposit.

Yu, Conrad M. (Antioch, CA)

2000-01-01T23:59:59.000Z

379

Cyclotron waves in a non-neutral plasma column  

SciTech Connect (OSTI)

A kinetic theory of linear electrostatic plasma waves with frequencies near the cyclotron frequency {Omega}{sub c{sub s}} of a given plasma species s is developed for a multispecies non-neutral plasma column with general radial density and electric field profiles. Terms in the perturbed distribution function up to O(1/{Omega}{sub c{sub s}{sup 2}}) are kept, as are the effects of finite cyclotron radius r{sub c} up to O(r{sub c}{sup 2}). At this order, the equilibrium distribution is not Maxwellian if the plasma temperature or rotation frequency is not uniform. For r{sub c}{yields}0, the theory reproduces cold-fluid theory and predicts surface cyclotron waves propagating azimuthally. For finite r{sub c}, the wave equation predicts that the surface wave couples to radially and azimuthally propagating Bernstein waves, at locations where the wave frequency equals the local upper hybrid frequency. The equation also predicts a second set of Bernstein waves that do not couple to the surface wave, and therefore have no effect on the external potential. The wave equation is solved both numerically and analytically in the WKB approximation, and analytic dispersion relations for the waves are obtained. The theory predicts that both types of Bernstein wave are damped at resonances, which are locations where the Doppler-shifted wave frequency matches the local cyclotron frequency as seen in the rotating frame.

Dubin, Daniel H. E. [Department of Physics, University of California at San Diego, La Jolla, California 92093 (United States)

2013-04-15T23:59:59.000Z

380

ARM Madden-Julian Oscillation Investigation Experiment  

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

Madden-Julian Oscillation Investigation Experiment Madden-Julian Oscillation Investigation Experiment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

Note: This page contains sample records for the topic "oscillating water column" 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

PROSPECT - A precision oscillation and spectrum experiment  

E-Print Network [OSTI]

Segmented antineutrino detectors placed near a compact research reactor provide an excellent opportunity to probe short-baseline neutrino oscillations and precisely measure the reactor antineutrino spectrum. Close proximity to a reactor combined with minimal overburden yield a high background environment that must be managed through shielding and detector technology. PROSPECT is a new experimental effort to detect reactor antineutrinos from the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory, managed by UT Battelle for the U.S. Department of Energy. The detector will use novel lithium-loaded liquid scintillator capable of neutron/gamma pulse shape discrimination and neutron capture tagging. These enhancements improve the ability to identify neutrino inverse-beta decays and reject background events in analysis. Results from these efforts will be covered along with their implications for an oscillation search and a precision spectrum measurement.

T. J. Langford

2014-12-22T23:59:59.000Z

382

Neutrino Oscillation Experiments at Nuclear Reactors  

E-Print Network [OSTI]

In this paper I give an overview of the status of neutrino oscillation experiments performed using nuclear reactors as sources of neutrinos. I review the present generation of experiments (Chooz and Palo Verde) with baselines of about 1 km as well as the next generation that will search for oscillations with a baseline of about 100 km. While the present detectors provide essential input towards the understanding of the atmospheric neutrino anomaly, in the future, the KamLAND reactor experiment represents our best opportunity to study very small mass neutrino mixing in laboratory conditions. In addition KamLAND with its very large fiducial mass and low energy threshold, will also be sensitive to a broad range of different physics.

Giorgio Gratta

1999-05-06T23:59:59.000Z

383

Probing deformed commutators with macroscopic harmonic oscillators  

E-Print Network [OSTI]

A minimal observable length is a common feature of theories that aim to merge quantum physics and gravity. Quantum mechanically, this concept is associated to a nonzero minimal uncertainty in position measurements, which is encoded in deformed commutation relations. In spite of increasing theoretical interest, the subject suffers from the complete lack of dedicated experiments and bounds to the deformation parameters are roughly extrapolated from indirect measurements. As recently proposed, low-energy mechanical oscillators could allow to reveal the effect of a modified commutator. Here we analyze the free evolution of high quality factor micro- and nano-oscillators, spanning a wide range of masses around the Planck mass $m_{\\mathrm{P}}$ (${\\approx 22\\,\\mu\\mathrm{g}}$), and compare it with a model of deformed dynamics. Previous limits to the parameters quantifying the commutator deformation are substantially lowered.

Mateusz Bawaj; Ciro Biancofiore; Michele Bonaldi; Federica Bonfigli; Antonio Borrielli; Giovanni Di Giuseppe; Lorenzo Marconi; Francesco Marino; Riccardo Natali; Antonio Pontin; Giovanni A. Prodi; Enrico Serra; David Vitali; Francesco Marin

2014-11-24T23:59:59.000Z

384

Probing deformed commutators with macroscopic harmonic oscillators  

E-Print Network [OSTI]

A minimal observable length is a common feature of theories that aim to merge quantum physics and gravity. Quantum mechanically, this concept is associated to a nonzero minimal uncertainty in position measurements, which is encoded in deformed commutation relations. In spite of increasing theoretical interest, the subject suffers from the complete lack of dedicated experiments and bounds to the deformation parameters are roughly extrapolated from indirect measurements. As recently proposed, low-energy mechanical oscillators could allow to reveal the effect of a modified commutator. Here we analyze the free evolution of high quality factor micro- and nano-oscillators, spanning a wide range of masses around the Planck mass $m_{\\mathrm{P}}$ (${\\approx 22\\,\\mu\\mathrm{g}}$), and compare it with a model of deformed dynamics. Previous limits to the parameters quantifying the commutator deformation are substantially lowered.

Bawaj, Mateusz; Bonaldi, Michele; Bonfigli, Federica; Borrielli, Antonio; Di Giuseppe, Giovanni; Marconi, Lorenzo; Marino, Francesco; Natali, Riccardo; Pontin, Antonio; Prodi, Giovanni A; Serra, Enrico; Vitali, David; Marin, Francesco

2014-01-01T23:59:59.000Z

385

PROSPECT - A precision oscillation and spectrum experiment  

E-Print Network [OSTI]

Segmented antineutrino detectors placed near a compact research reactor provide an excellent opportunity to probe short-baseline neutrino oscillations and precisely measure the reactor antineutrino spectrum. Close proximity to a reactor combined with minimal overburden yield a high background environment that must be managed through shielding and detector technology. PROSPECT is a new experimental effort to detect reactor antineutrinos from the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory, managed by UT Battelle for the U.S. Department of Energy. The detector will use novel lithium-loaded liquid scintillator capable of neutron/gamma pulse shape discrimination and neutron capture tagging. These enhancements improve the ability to identify neutrino inverse-beta decays and reject background events in analysis. Results from these efforts will be covered along with their implications for an oscillation search and a precision spectrum measurement.

,

2015-01-01T23:59:59.000Z

386

Retrieval of water vapor profiles over ocean using SSM/I and SSM/T-2  

E-Print Network [OSTI]

of water vapor profiles, while the SSM/I can be used to retrieve, among other things, the total integrated water vapor (TIWV) in a column of air. It is theoretically possible to use SSM/I data to supplement the SSM/T-2 data, producing more accurate water...

Blankenship, Clay Bruce

2012-06-07T23:59:59.000Z

387

Modern approaches to the analysis of disinfection by-products in drinking water  

Science Journals Connector (OSTI)

...with organic nitrogen in the pool...in drinking water with ozone...inherent aqueous solubility of many of...organic-nitrogen precursors...Annual Conf. (Water Quality...capillary column gas chromatography...inherent aqueous solubility of many of...extraction from water difficult...Monitoring methods Gas Chromatography-Mass...

2009-01-01T23:59:59.000Z

388

Wavelength-doubling optical parametric oscillator  

DOE Patents [OSTI]

A wavelength-doubling optical parametric oscillator (OPO) comprising a type II nonlinear optical medium for generating a pair of degenerate waves at twice a pump wavelength and a plurality of mirrors for rotating the polarization of one wave by 90 degrees to produce a wavelength-doubled beam with an increased output energy by coupling both of the degenerate waves out of the OPO cavity through the same output coupler following polarization rotation of one of the degenerate waves.

Armstrong, Darrell J. (Albuquerque, NM); Smith, Arlee V. (Albuquerque, NM)

2007-07-24T23:59:59.000Z

389

PRESSURE OSCILLATION IN RHIC CRYOGENIC SYSTEM.  

SciTech Connect (OSTI)

HORIZONTAL BEAM VIBRATION AROUND 10HZ IN THE RELATIVISTIC HEAVY ION COLLIDER (RHIC) HAVE BEEN IDENTIFIED AND THE POSSIBLE SOURCES TO CAUSE THIS VIBRATION HAVE BEEN INVESTIGATED. TO DETERMINE THE HETIUM PRESSURE OSCILLATIONS AS A POSSIBLE PRIMARY VIBRATION SOURCE, HELIUM PRESSURE MEASUREMENTS WERE CARRIED OUT IN THE FIVE CRYOGENIC TRANSFER LINES AT 2 VALVE BOXES AND 6 LEAD PORTS AT 2 TRIPLET CRYOSTAT FOR BOTH MAGNET RINGS. ADDITIONALLY, COLD MA...

JIA,L.MONTAG,C.TALLERICO,T.HIRZEL,W.NICOLETTI,A.

2003-09-22T23:59:59.000Z

390

Quantum decoherence of the damped harmonic oscillator  

E-Print Network [OSTI]

In the framework of the Lindblad theory for open quantum systems, we determine the degree of quantum decoherence of a harmonic oscillator interacting with a thermal bath. It is found that the system manifests a quantum decoherence which is more and more significant in time. We also calculate the decoherence time and show that it has the same scale as the time after which thermal fluctuations become comparable with quantum fluctuations.

A. Isar

2006-06-27T23:59:59.000Z

391

Coherence condition for resonant neutrino oscillation  

Science Journals Connector (OSTI)

We study the coherence condition for a neutrino to keep coherence between the effective mass eigenstates in the presence of matter and examine whether or not resonant neutrino oscillation (RNO) happens in the cases of solar and SN 1987A neutrinos. As a result, it becomes evident that RNO is possible in the solar-neutrino case but impossible in the SN 1987A neutrino case.

Hajime Anada and Haruhiko Nishimura

1990-04-15T23:59:59.000Z

392

Perturbative Effective Theory in an Oscillator Basis?  

Science Journals Connector (OSTI)

The effective interaction problem in nuclear physics is believed to be highly nonperturbative, requiring extended high-momentum spaces for accurate solution. We trace this to difficulties that arise at both short and long distances when the included space is defined in terms of a basis of harmonic oscillator Slater determinants. We show, in the simplest case of the deuteron, that both difficulties can be circumvented, yielding highly perturbative results in the potential even for modest (?4??) included spaces.

W. C. Haxton and T. Luu

2002-10-11T23:59:59.000Z

393

More about neutron - mirror neutron oscillation  

E-Print Network [OSTI]

It was pointed out recently that oscillation of the neutron $n$ into mirror neutron $n'$, a sterile twin of the neutron with exactly the same mass, could be a very fast process with the the baryon number violation, even faster than the neutron decay itself. This process is sensitive to the magnetic fields and it could be observed by comparing the neutron lose rates in the UCN storage chambers for different magnetic backgrounds. We calculate the probability of $n-n'$ oscillation in the case when a mirror magnetic field $\\vec{B}'$ is non-zero and show that in this case it can be suppressed or resonantly enhanced by applying the ordinary magnetic field $\\vec{B}$, depending on its strength and on its orientation with respect to $\\vec{B}'$. The recent experimental data, under this hypothesis, still allow the $n-n'$ oscillation time order 1 s or even smaller. Moreover, they indicate that the neutron losses are sensitive to the orientation of the magnetic field. %at about $3\\sigma$ level. If these hints will be confirmed in the future experiments, this would point to the presence of the mirror magnetic field on the Earth of the order of 0.1 G, or some equivalent spin-dependent force of the other origin that makes a difference between the neutron and mirror neutron states.

Zurab Berezhiani

2008-04-13T23:59:59.000Z

394

Variational Calculation with Harmonic-Oscillator Eigenfunctions  

Science Journals Connector (OSTI)

Variational calculations play an important role in quantum mechanics particularly in determining the ground-state energy of physical systems. Didactic examples in which one can see how the exact energy and wave function are approached by using a family of trial functions are not very numerous. An example was given in a recent book [M. Moshinsky The Harmonic Oscillator in Modern Physics: From Atoms to Quarks (Gordon and Breach New York 1969)] which discusses the ground state of the hydrogen atom using as trial wave function a linear combination of harmonic-oscillator states. In the present paper we carry out a similar analysis for the ground state of a particle of mass m in a three-dimensional square-well potential. We discuss not only the approach to the exact energy when we vary the frequency and the number of oscillator states but also analyze the overlap of the exact and variational wave functions and compare the exact and approximate form factors.

V. C. Aguilera-Navarro; R. M. Méndez V.

1971-01-01T23:59:59.000Z

395

Evaluation of Packed Columns in Supercritical Extraction Processes  

E-Print Network [OSTI]

used was 1/4 inch Raschig rings with a surface area of 220 ft 2 /ft 3 . The supercritical systems studied were carbon dioxide/ethanol/water and carbon dioxide/isopropanol/water at 102 atmos pheres and 35 0 C and 102 atmospheres and 40 0 C... to the differences in performance of the two systems. Carbon dioxide is one of the most commonly used supercritical solvents because it is non-toxic and non-flammable. Carbon dioxide is inexpensive rela tive to other solvents and has a conveniently low critical...

Rathkamp, P. J.; Fair, J. R.; Humphrey, J. L.

396

APRIL 2009 VOL. 22, NO. 2 The Vertebral Column...  

E-Print Network [OSTI]

moved his family to the Panama Canal Zone, where he taught and worked on his PhD degree on fresh-water fishes of Panama. Storrs followed Horace to Panama, where he moved in with him in 1963 and spent his to finish his undergraduate work at Florida State University in 1966. A subse- quent trip to Panama

Mathis, Wayne N.

397

The effects of various reservoir and well parameters on water coning performance  

E-Print Network [OSTI]

research on water coning has been directed toward mini- mizing water production by reduced well penetration or production rate control. However, complete depletion of an oil column under- lain by water will necessarily be accompanied by considerable...- ducing excessive amounts of coned water is to either reduce the production rate or plug back the well to a lesser penetration of the producing zones. Continued plug backs or reductions in pres- sure drawdown to eliminate or minimize water production...

Byrne, William Bryan

2012-06-07T23:59:59.000Z

398

OPTIMAL CONTROL OF XENON OSCILLATIONS IN LOAD FOLLOW OF A LARGE NUCLEAR REACTOR  

Science Journals Connector (OSTI)

Abstract The problem of xenon spatial oscillations control during the load follow of large pressure water reactors is formulated as an optimization problem. The state equations of the system are composed of the one-group diffusion equation with temperature and xenon feedbacks, the iodine-xenon dynamics equations, and an energy balance equation for the core. The resulting distributed parameter model is first coverted into a lumped one by eigenfunction expansion and then a combination method, based on Differential Dynamic Programming and Matrix Riccati Method, is developed to obtain the optimal solution which can closely follow the desired power demand and maintain the desired flux distribution without too much control effort. Computational results show that the algorithms used in the proposed method converge for a broad spectrum of load follows. With the same precision, the combination method, comparing with DDP alone, is fairly computationally efficient. Keywords. Differential dynamic programming; optimization; Nuclear reactor; load follow; xenon oscillations.

Xinping Yang; Longzhou Fu

1986-01-01T23:59:59.000Z

399

EVIDENCE OF CONTRIBUTION OF INTERVENING CLOUDS TO GAMMA-RAY BURST'S X-RAY COLUMN DENSITY  

SciTech Connect (OSTI)

The origin of excess of X-ray column density with respect to optical extinction in gamma-ray bursts (GRBs) is still a puzzle. A proposed explanation of the excess is the photoelectric absorption due to the intervening clouds along a GRB's line of sight. Here, we test this scenario by using the intervening Mg II absorption as a tracer of the neutral hydrogen column density of the intervening clouds. We identify a connection between the large X-ray column density (and large column density ratio of log (N{sub H,X}/N{sub H{sub I}})?0.5) and large neutral hydrogen column density probed by the Mg II doublet ratio (DR). In addition, GRBs with large X-ray column density (and large ratio of log (N{sub H,X}/N{sub H{sub I}})>0) tend to have multiple saturated intervening absorbers with DR < 1.2. These results therefore indicate an additional contribution from the intervening system to the observed X-ray column density in some GRBs, although the contribution from the host galaxy alone cannot be excluded based on this study.

Wang, J., E-mail: wj@bao.ac.cn [National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China)

2013-10-20T23:59:59.000Z

400

Influence of the gas-flow Reynolds number on a plasma column in a glass tube  

SciTech Connect (OSTI)

Atmospheric-plasma generation inside a glass tube is influenced by gas stream behavior as described by the Reynolds number (Rn). In experiments with He, Ne, and Ar, the plasma column length increases with an increase in the gas flow rate under laminar flow characterized by Rn < 2000. The length of the plasma column decreases as the flow rate increases in the transition region of 2000 < Rn < 4000. For a turbulent flow beyond Rn > 4000, the length of the plasma column is short in front of the electrode, eventually leading to a shutdown.

Jin, Dong Jun; Uhm, Han S.; Cho, Guangsup [Department of Electronic and Biological Physics, Kwangwoon University, 20 Kwangwon-Ro, Nowon-Gu, Seoul 139-701 (Korea, Republic of)] [Department of Electronic and Biological Physics, Kwangwoon University, 20 Kwangwon-Ro, Nowon-Gu, Seoul 139-701 (Korea, Republic of)

2013-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "oscillating water column" 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

A study of flow patterns and dissolution kinetics in bubble columns  

SciTech Connect (OSTI)

Research objectives were to: study liquid and gas phase flow patterns in a bubble column reactor by comparing observations made with reported observations and hydrodynamic models; study mixing of two miscible liquid solutions with and without solid suspension in a bubble column reactor; study the kinetics of dissolution of a reactive solid phase suspended in the liquid phase in a bubble column reactor; and calculate mass transfer coefficients and apparent reaction rate from suitable mathematical models. Observations and conclusions are summarized in a series of viewgraphs.

Long, R.; Holbrook, S.; Chang, T. [New Mexico State Univ., Las Cruces, NM (United States). Dept. of Chemical Engineering

1997-11-01T23:59:59.000Z

402

Humans can run on water using big instantly-changable shoes  

E-Print Network [OSTI]

, support including hydrofoils and planing boats. These tend to use one mechanism for support (a planing is still open. But it is possible if the wings are in the water. The oscillating wing craft, the Pogofoil

Ruina, Andy L.

403

Stability analysis of the boiling water reactor : methods and advanced designs  

E-Print Network [OSTI]

Density Wave Oscillations (DWOs) are known to be possible when a coolant undergoes considerable density reduction while passing through a heated channel. In the development of boiling water reactors (BWRs), there has been ...

Hu, Rui, Ph. D. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

404

Motion of Nanomagnet Oscillators - Argonne National Laboratories, Materials  

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

Highlights > Motion of Nanomagnet Oscillators Highlights > Motion of Nanomagnet Oscillators Motion of Nanomagnet Oscillators Nanopillars consisting of two magnetic layers separated by an insulating or non-magnetic metal can exhibit oscillations: a constant current can make the magnetization in one layer precess with frequencies in the gigahertz range. The physics behind this is the so-called spin torque effect, through which conduction electrons transfer angular momentum to the magnetization in a layer. If the current is adjusted such that the rate of transfer of angular momentum from the conduction electrons to the magnetization in the second magnetic layer is precisely balanced by the loss of angular momentum due to dissipation in the magnetic layer, the oscillations become very precise and long-lived. Such devices are called spin torque oscillators,

405

Variability in the Relative Penetration of Ultraviolet Radiation to Photosynthetically Available Radiation in Temperate Coastal Waters, Japan  

Science Journals Connector (OSTI)

UVR and PAR wavelengths are attenuated to different extents within the water column, causing variations in spectral composition with depth. The present investigation (a) describes the variability of UVR and PA...

Victor S. Kuwahara; Tatsuki Toda; Koji Hamasaki…

2000-08-01T23:59:59.000Z

406

Remediation of ground water containing chlorinated and brominated hydrocarbons, benzene and chromate by sequential treatment using ZVI and GAC  

Science Journals Connector (OSTI)

A laboratory experiment with two sequenced columns was performed as a preliminary study for the installation of a permeable reactive barrier (PRB) at a site where a mixed ground water contamination exists. The...

Volkmar Plagentz; Markus Ebert; Andreas Dahmke

2006-03-01T23:59:59.000Z

407

Nonlinear dynamics and stability of boiling water reactors: Part 2 - Quantitative analysis  

SciTech Connect (OSTI)

A physical model of nonlinear boiling water reactor (BWR) dynamics has been developed and employed to calculate the amplitude of limit cycle oscillations and their effects on fuel integrity over a wide range of operating conditions in the Vermont Yankee reactor. These calculations have confirmed that, beyond the threshold for linear stability, the reactor's state variables undergo limit cycle oscillations. This work shows that the amplitudes of these oscillations are very sensitive to changes in operating conditions and are not restricted to small magnitudes as observed in previous stability tests. Consequently, large-amplitude limit cycle oscillations become a possible scenario for BWR operation at low-flow conditions. The effects on fuel integrity of such large-amplitude oscillations have been studied in detail. In particular, it has been shown that limit cycles that oscillate with frequencies higher than 0.25 Hz and that reach the high-power safety scram level of 120 % are not likely to compromise fuel integrity.

March-Leuba, J.; Cacuci, D.G.; Perez, R.B.

1986-06-01T23:59:59.000Z

408

Viscosity Oscillations and Hysteresis in Dilute Emulsions  

Science Journals Connector (OSTI)

We show that the viscosity of a dilute emulsion exhibits oscillations and hysteresis as a function of the shear rate. This results from breaking up of droplets in response to the shear flow. The new phenomena we describe are generic and do not depend on a specific choice of model. The interesting dependence of the basic properties of a dilute emulsion on the shear rate results from the fact that the immersed droplets must break when the shear rate applied to the system is large enough.

Yiftah Navot and Moshe Schwartz

1997-12-15T23:59:59.000Z

409

Coherence properties of the stochastic oscillator  

Science Journals Connector (OSTI)

An oscillator with stochastic frequency is discussed as a model for evaluating the quantum coherence properties of a physical system. It is found that the choice of jump statistics has to be considered with care if unphysical consequences are to be avoided. We investigate one such model, evaluate the damping it causes, the decoherence rate and the correlations it results in, and the properties of the state for asymptotically long times. Also the choice of initial state and its effect on the time evolution of the correlations are discussed.

Martti Havukainen and Stig Stenholm

1999-07-01T23:59:59.000Z

410

Matrix elements for rotating Morse oscillators  

Science Journals Connector (OSTI)

In this paper formulas and recursion relations for the expectation values of the operators {1-exp[-a(r-re)]}n, (r-re)n, exp[-a(r-re)]n, and (r-re){exp[-a(r-re)]}n are derived for a rotating Morse oscillator. These equations can be used to calculate the diagonal (v=v’, J=J’) and off-diagonal (v?v’, J?J’) matrix elements. Asymptotic approximations for the diagonal elements of the (r-re)n operator, ?vJ?(r-re)?vJ? and ?vJ?(r-re)2?vJ?, are also obtained.

A. Requena; A. López Pieiro; B. Moreno

1986-11-01T23:59:59.000Z

411

Neutrino oscillations and mixings with three flavors  

Science Journals Connector (OSTI)

Global fits to all data of candidates for neutrino oscillations are presented in the framework of a three-flavor model. The analysis excludes mass regions where the MSW effect is important for the solar neutrino problem. The best fit gives ?1?28.9°, ?2?4.2°, ?3?45.0°, m22-m12?2.87×10-4 eV2, and m32-m22?1.11 eV2 indicating essentially maximal mixing between the two lightest neutrino mass eigenstates.

Tommy Ohlsson and Håkan Snellman

1999-10-07T23:59:59.000Z

412

Neutrino Oscillations from Strings and Other Funny Things  

E-Print Network [OSTI]

I will discuss three related unconventional ways to generate neutrino oscillations (1)Equivalence principle violation by the string dilaton field (i2)Violation of Lorentz Invariance and (3) Equivalence principle violation through a non-universal tensor neutrino-gravity coupling. These unorthodox neutrino oscillation mechanisms are shown to be viable at the level of our present experimental knowledge and demonstrate that neutrino oscillations can probe very profound questions.

A. Halprin

1997-10-10T23:59:59.000Z

413

Large Scale Ice Water Path and 3-D Ice Water Content  

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

Cloud ice water concentration is one of the most important, yet poorly observed, cloud properties. Developing physical parameterizations used in general circulation models through single-column modeling is one of the key foci of the ARM program. In addition to the vertical profiles of temperature, water vapor and condensed water at the model grids, large-scale horizontal advective tendencies of these variables are also required as forcing terms in the single-column models. Observed horizontal advection of condensed water has not been available because the radar/lidar/radiometer observations at the ARM site are single-point measurement, therefore, do not provide horizontal distribution of condensed water. The intention of this product is to provide large-scale distribution of cloud ice water by merging available surface and satellite measurements. The satellite cloud ice water algorithm uses ARM ground-based measurements as baseline, produces datasets for 3-D cloud ice water distributions in a 10 deg x 10 deg area near ARM site. The approach of the study is to expand a (surface) point measurement to an (satellite) areal measurement. That is, this study takes the advantage of the high quality cloud measurements at the point of ARM site. We use the cloud characteristics derived from the point measurement to guide/constrain satellite retrieval, then use the satellite algorithm to derive the cloud ice water distributions within an area, i.e., 10 deg x 10 deg centered at ARM site.

Liu, Guosheng

414

Solving The Ising Problem Using Degenerate Optical Parametric Oscillators  

Science Journals Connector (OSTI)

A degenerate optical parametric oscillator network is proposed to solve the NP-hard problem of finding a ground state of the Ising Hamiltonian.

Wang, Zhe; Marandi, Alireza; Wen, Kai; Byer, Robert L; Yamamoto, Yoshihisa

415

Feedback Control of Azimuthal Oscillations in ExB Devices --...  

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

efficiency of the thruster by increasing electron transport to the anode. Electromagnetic interference from plasma oscillations in the thruster can also interfere with satellite...

416

Method of Focussing Waves by Inhomogeneous Oscillations of the...  

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

Method of Focussing Waves by Inhomogeneous Oscillations of the underlying Medium Disclosed is a nw method of refracting electromagnetic and other waves in a dispersive medium by...

417

Quantum model of an autonomous oscillator in hard excitation regime  

E-Print Network [OSTI]

We propose the simple quantum model of nonlinear autonomous oscillator in hard excitation regime. We originate from classical equations of motion for similar oscillator and quantize them using the Lindblad master equation for the density matrix of this system. The solution for the populations of the stationary states of such oscillator may be explicitly found in the case when nonlinearity parameters of the problem are small. It was shown that in this situation there are three distinct regimes of behavior of the model. We compare properties of this model with corresponding ones of close open system, namely quantum oscillator in soft excitation regime. We discuss a possible applications of the results obtained.

E. D. Vol; M. A. Ialovega

2014-12-01T23:59:59.000Z

418

Design of Slurry Bubble Column Reactors: Novel Technique for Optimum Catalyst Size Selection  

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

Slurry Bubble Column Reactors: Novel Technique Slurry Bubble Column Reactors: Novel Technique for Optimum Catalyst Size Selection Opportunity The Department of Energy's National Energy Technology Laboratory (NETL) is seeking licensing partners interested in implementing United States Patent Number 7,619,011 entitled "Design of Slurry Bubble Column Reactors: Novel Technique for Optimum Catalyst Size Selection." Disclosed in this patent is a method to determine the optimum catalyst particle size for application in a fluidized bed reactor, such as a slurry bubble column reactor (SBCR), to convert synthesis gas into liquid fuels. The reactor can be gas-solid, liquid- solid, or gas-liquid-solid. The method considers the complete granular temperature balance based on the kinetic theory of

419

Gas holdup in a gas-liquid-fiber semi-batch bubble column.  

E-Print Network [OSTI]

??A 4-m high, 15.24-cm diameter semi-batch bubble column connected to one of three perforated plate gas distributors with open area ratios A = 0.57%, 0.99%,… (more)

Su, Xuefeng

2005-01-01T23:59:59.000Z

420

Strategic Planning -College -Agricultural Sciences & Natural Resources Unit Assessment Report -Four Column  

E-Print Network [OSTI]

Strategic Planning - College - Agricultural Sciences & Natural Resources Unit Assessment Report - Four Column Texas Tech University Priorities Means of Assessment & Criteria / Tasks Results Action & Natural Resources - 2013 Priority 1_Increase Enrollment and Promote Student Success (CASNR - Outcome 1

Zhang, Yuanlin

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


421

Determination of Asphaltenes in Crude Oil and Petroleum Products by the on Column Precipitation Method  

Science Journals Connector (OSTI)

Determination of Asphaltenes in Crude Oil and Petroleum Products by the on Column Precipitation Method ... An improved analytical method for the determination of asphaltene content in crude oils and petroleum products was developed. ... Composition of heavy petroleums. ...

Estrella Rogel; Cesar Ovalles; Michael E. Moir; John F. Schabron

2009-08-14T23:59:59.000Z

422

Microwave heating of electrons of a dense plasma column at frequencies higher than electron cyclotron frequency  

Science Journals Connector (OSTI)

In this experimental study the absorption of plasma waves, excited in a dense plasma column, was investigated and the localization of the regions of efficient heating of electrons were determined in a broad...ce/...

J. ?atlov; L. Kryška; V. N. Budnikov

1973-01-01T23:59:59.000Z

423

Microwave heating of electrons of a dense plasma column at frequencies higher than electron cyclotron frequency  

Science Journals Connector (OSTI)

In the overdense collisionless plasma column inserted through the narrow sides of a rectangular waveguide, the excited electron cyclotron harmonic waves (CHWs) are studied by means of two movable probes and a ...

J. ?atlov; R. Klíma; L. Kryška; V. N. Budnikov…

1973-01-01T23:59:59.000Z

424

Calculation of limiting horizontal load on piles-columns based on cone-penetration data  

Science Journals Connector (OSTI)

Results of field tests confirming the correlation relation between the limiting load on a pile-column and the specific resistance of the soil beneath the cone of the probe are presented. A formula is proposed ...

B. V. Goncharov; O. V. Galimnurova…

2012-03-01T23:59:59.000Z

425

Comparative study of the performance of conventional and column flotation when treating coking coal fines  

Science Journals Connector (OSTI)

Investigations were carried out on coking coal fines by conventional cell and column flotation techniques. The effects of different operating parameters were evaluated for both conventional and column flotation. The coal fines were collected from Bhojudih washery, India. These coal fines averaged 24.4% ash, 19.8% volatile matter and 53.8% fixed carbon on a dry basis. A commercial grade sodium silicate, light diesel oil and pine oil were used as depressant, collector and frother respectively. The flotation performance was compared with release analysis. The conventional flotation results indicated that a clean coal with 14.4% ash could be obtained at 78.0% yield with 88.4% combustible recovery. The ash of the clean coal could be further reduced to 10.1% at 72.0% yield with 85.6% combustible recovery by using column flotation. The column flotation results were close to those obtained by release analysis.

M.S. Jena; S.K. Biswal; S.P. Das; P.S.R. Reddy

2008-01-01T23:59:59.000Z

426

Gamma-Ray Transmission Scans of Naphtha Splitter Column: A Case Study  

SciTech Connect (OSTI)

The gamma-ray transmission technique is well known and widely used to on-line examine inner details of industrial process column. For that purpose, a particular case study was conducted to diagnose the performance of a Naphtha Splitter Column in real time at one petrochemical plant in Malaysia. The technique employed Co-60 as a radioisotope sealed source to emit gamma radiation and a NaI(TI) scintillation as detector. This technique provides a visible representation of the true nature of the naphtha splitter column wherein the process and mechanical problems inside the column can be identified while it is in operation. This paper demonstrates details of the technique used and shows the result obtained.

Zain, Rasif Mohd; Rahman, Mohd Fitri Abd; Hasan, Nor Pa'iza Mohamad; Abdullah, Jaafar [Malaysian Nuclear Agency (Nuklear Malaysia), Bangi, 43000 Kajang, Selangor (Malaysia)

2008-05-20T23:59:59.000Z

427

A Case Study of Karstic Collapse Columns Delimitation in Coal Mine by GIS Spatial Analysis  

Science Journals Connector (OSTI)

Karstic collapse column (KCC), a kind of vertical structure typically developed in Carboniferous - Permian coal- fields in north China, adversely affects the safety of coal mine production. The formation of KCC e...

Jinhui Luo; Yongguo Yang; Yuhua Chen

2012-01-01T23:59:59.000Z

428

Effects of CSP Support Particle Size on the Performance of Larger Diameter Liquid Partition Columns  

Science Journals Connector (OSTI)

......research-article Editorial Effects of CSP Support Particle Size on the Performance...packed with different particle sizes of CSP (controlled surface porosity) support...larger, infinite-diameter columns and CSP support used in this study. Reduced plate......

H. C. Beachell; J. J. DeStefano

1972-08-01T23:59:59.000Z

429

Seismic Assessment and Retrofit of Existing Multi-Column Bent Bridges  

E-Print Network [OSTI]

Seismic Assessment and Retrofit of Existing Multi-Column Bent Bridges By Cole C. Mc ................................................................................................................................... 6 Seismic Activity in Western Washington State Approach ­ Bridge Modeling .............................................11 Seismic Excitations

430

Effects from Alkali-Silica Reacton and Delayed Ettringite Formation on Reinforced Concrete Column Lap Splices  

E-Print Network [OSTI]

Reinforced concrete bridge columns can deteriorate prematurely due to the alkali-silica reaction (ASR) and/or delayed ettringite formation (DEF), causing internal expansion and cracking on the surface of the concrete. The performance...

Eck, Mary

2012-07-16T23:59:59.000Z

431

EXPERIMENTAL INVESTIGATION OF TRANSPORT OF STRONGLY RETAINED SPECIES BY SOIL COLUMNS  

Science Journals Connector (OSTI)

Column experiments have been extensively used in transport studies of major cations but few investigations are available on migration through soils of strongly retained species that are environmentally relevan...

MARCO PETRANGELI PAPINI; MAURO MAJONE

1997-04-01T23:59:59.000Z

432

Heat and mass transfer in bubble column dehumidifiers for HDH desalination  

E-Print Network [OSTI]

Heat and mass transfer processes governing the performance of bubble dehumidifier trays are studied in order to develop a predictive model and design rules for efficient and economical design of bubble column dehumidifiers ...

Tow, Emily W

2014-01-01T23:59:59.000Z

433

Effects from Alkali-Silica Reacton and Delayed Ettringite Formation on Reinforced Concrete Column Lap Splices.  

E-Print Network [OSTI]

??Reinforced concrete bridge columns can deteriorate prematurely due to the alkali-silica reaction (ASR) and/or delayed ettringite formation (DEF), causing internal expansion and cracking on the… (more)

Eck, Mary

2012-01-01T23:59:59.000Z

434

HF heating of a plasma column at frequencies below the electron cyclotron frequency  

Science Journals Connector (OSTI)

Dispersion of waves, excited by the helical structure in a plasma column and the heating of a tail of the electron distribution ... frequencies below the electron plasma and the electron cyclotron frequency.

J. ?atlov; V. Kopecký; J. Musil; F. Žá?ek; K. Novik

1978-01-01T23:59:59.000Z

435

Simulation of microbial transport and carbon tetrachloride biodegradation in intermittently-fed aquifer columns  

E-Print Network [OSTI]

Simulation of microbial transport and carbon tetrachloride biodegradation in intermittently associated with carbon tetrachloride (CT) biodegradation in laboratory aquifer columns operated with a pulsed Hydrology: Groundwater transport; KEYWORDS: biodegradation, carbon tetrachloride, microbial transport

436

Small Column Ion Exchange Technology at Savannah River Site | Department of  

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

Small Column Ion Exchange Technology at Savannah River Site Small Column Ion Exchange Technology at Savannah River Site Small Column Ion Exchange Technology at Savannah River Site The Small Column Ion Exchange (SCIX) system being developed for deployment at the Savannah River Site (SRS) is a supplementary salt waste processing technology that, if implemented, will augment the baseline Salt Waste Processing Facility (SWPF) capability. An opportunity exists to shorten the SRS radioactive waste system lifecycle by 6 years, and significantly reduce life cycle costs, by accelerating salt processing to earlier completion, simultaneous with sludge vitrification. As described in the Enhanced Tank Waste Strategy, which is part of the Department of Energy (DOE) Office of Environmental Management (EM) Roadmap - EM Journey to Excellence,

437

The Monte Carlo Independent Column Approximation’s Conditional Random Noise: Impact on Simulated Climate  

Science Journals Connector (OSTI)

The Monte Carlo Independent Column Approximation (McICA) method for computing domain-average radiative fluxes is unbiased with respect to the full ICA, but its flux estimates contain conditional random noise. Results for five experiments are used ...

P. Räisänen; H. W. Barker; J. N. S. Cole

2005-11-01T23:59:59.000Z

438

Nonlinear wave loads on a three-column TLP in real seas  

E-Print Network [OSTI]

of offshore structures. In extreme storm sea conditions waves are significantly non- Gaussian and create remarkable nonlinear excitation loads, especially for the surface- piercing-column support of shuctures such as semi-submersibles, tension leg platforms... of offshore structures. In extreme storm sea conditions waves are significantly non- Gaussian and create remarkable nonlinear excitation loads, especially for the surface- piercing-column support of shuctures such as semi-submersibles, tension leg platforms...

Wang, Zhongmin

2012-06-07T23:59:59.000Z

439

A column based variance analysis approach to static reservoir model upgridding  

E-Print Network [OSTI]

A COLUMN BASED VARIANCE ANALYSIS APPROACH TO STATIC RESERVOIR MODEL UPGRIDDING A Thesis by MATTHEW BRANDON TALBERT 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 COLUMN BASED VARIANCE ANALYSIS APPROACH TO STATIC RESERVOIR MODEL UPGRIDDING A Thesis by MATTHEW BRANDON TALBERT Submitted to the Office...

Talbert, Matthew Brandon

2008-10-10T23:59:59.000Z

440

Flow induced vibration of a cantilever column jet: a spectral analysis  

E-Print Network [OSTI]

FLON INDUCED VIBRATION OF A CANTILEVER COLUMN JET ? A SPECTRAL ANALYSIS A Thesis by ROY BRYANT SHILLING III Submitted to the Graduate College of Texas A8M University ir, partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1978 Major Subject: Ocean Engineering FLOW INDUCED VIBRATION OF A CANTILEVER COLUMN JET - A SPECTRAL ANALYSIS A Thesis by ROY BRYANT SHILLING III Approved as to style and content by: (Chairman of Committee) (Head of Department) ember...

Shilling, Roy Bryant

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "oscillating water column" 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

Turbulent drag reduction through oscillating discs  

E-Print Network [OSTI]

The changes of a turbulent channel flow subjected to oscillations of wall flush-mounted rigid discs are studied by means of direct numerical simulations. The Reynolds number is $R_\\tau$=$180$, based on the friction velocity of the stationary-wall case and the half channel height. The primary effect of the wall forcing is the sustained reduction of wall-shear stress, which reaches a maximum of 20%. A parametric study on the disc diameter, maximum tip velocity, and oscillation period is presented, with the aim to identify the optimal parameters which guarantee maximum drag reduction and maximum net energy saving, computed by taking into account the power spent to actuate the discs. This may be positive and reaches 6%. The Rosenblat viscous pump flow is used to predict the power spent for disc motion in the turbulent channel flow and to estimate localized and transient regions over the disc surface subjected to the turbulent regenerative braking effect, for which the wall turbulence exerts work on the discs. The...

Wise, Daniel J

2014-01-01T23:59:59.000Z

442

Response shaping using a subordinate oscillator array  

Science Journals Connector (OSTI)

Recent research has shown that arrays of small dynamic elements attached to a master structure can be tuned to significantly alter the time or frequency response of the system. Colloquially known as “fuzzy structures ” subordinate oscillators have led to applications including damping radio frequency filtering energy harvesting and micro electro-mechanical system (MEMS) chemical vapor sensing. A passive machinery damping system will be designed and tested for silencing properties. The current subordinate oscillator array (SOA) design consists of a plate of sheet metal with arrays of cantilevers machined of similar but different lengths. These cantilevers will have a range of natural frequencies which correspond to a desired frequency suppression range. When the SOA is mounted to a vibration source it functions as an acoustic meta-material which traps and dissipates energy. This is accomplished by synchronizing the phase and frequency of the cantilevers with machinery peak amplitude frequencies. By designing cantilevers properly the SOA acts as a mechanical broadband filter as opposed to a notch filter. The SOA will be tested primarily for vibration suppression performance but also for sensitivity to tolerance and energy storage density.

John A. Sterling

2014-01-01T23:59:59.000Z

443

Ultraviolet extrapolations in finite oscillator bases  

E-Print Network [OSTI]

The use of finite harmonic oscillator spaces in many-body calculations introduces both infrared (IR) and ultraviolet (UV) errors. The IR effects are well approximated by imposing a hard-wall boundary condition at a properly identified radius L_eff. We show that duality of the oscillator implies that the UV effects are equally well described by imposing a sharp momentum cutoff at a momentum Lambda_eff complementary to L_eff. By considering two-body systems with separable potentials, we show that the UV energy corrections depend on details of the potential, in contrast to the IR energy corrections, which depend only on the S-matrix. An adaptation of the separable treatment to more general interactions is developed and applied to model potentials as well as to the deuteron with realistic potentials. The previous success with a simple phenomenological form for the UV error is also explained. Possibilities for controlled extrapolations for A > 2 based on scaling arguments are discussed.

S. König; S. K. Bogner; R. J. Furnstahl; S. N. More; T. Papenbrock

2014-12-29T23:59:59.000Z

444

Plasma Shape Effects on Geodesic Acoustic Oscillations  

SciTech Connect (OSTI)

Geodesic acoustic mode (GAM) oscillations in tokamak plasmas are known to be sensitive to the value of the safety factor q. Through its linear and nonlinear interactions with ITG turbulence it has recently been shown in direct numerical global simulations that the turbulence driven heat transport is larger when GAM oscilations of large amplitude are present, resulting in an anomalous transport scaling with the inverse plasma current. GAM dispersion relations have been derived for circular, large aspect ratio configurations, and, recently, for helical configurations. Linear simulation results are presented using the global, PIC, finite element codes GYGLES and ORB5 for the GAM frequency, damping rate and Rosenbluth-Hinton residual zonal flow for a scan in plasma elongation. It is found that CAM frequency slightly decreases, while GAM damping rate and residual zonal flows increase with elongation. Nonlinear ITG simulations using the ORB5 code show that elongation reduces heat transport and that this is related to the plasma current and not q alone.

Villard, L.; Angelino, P.; Jolliet, S.; McMillan, B. F.; Sauter, O.; Tran, T. M. [Centre de Recherches en Physique des Plasmas, Association Euratom -- Confederation Suisse, EPFL, 1015 Lausanne (Switzerland); Bottino, A. [Max-Planck Gesellschaft Institute for Plasma Physics, D-85748 Garching (Germany); Hatzky, R. [Computer Center of the IPP, D-85748 Garching (Germany); Max-Planck Gesellschaft, D-85748 Garching (Germany)

2006-11-30T23:59:59.000Z

445

Enhanced synchronization in an array of spin torque nano oscillators in the presence of oscillating external magnetic field  

E-Print Network [OSTI]

We demonstrate that the synchronization of an array of electrically coupled spin torque nano-oscillators (STNO) modelled by Landau-Lifshitz-Gilbert-Slonczewski (LLGS) equation can be enhanced appreciably in the presence of a common external microwave magnetic field. The applied microwave magnetic field stabilizes and enhances the regions of synchronization in the parameter space of our analysis, where the oscillators are exhibiting synchronized oscillations thereby emitting improved microwave power. To characterize the synchronized oscillations we have calculated the locking range in the domain of external source frequency.

B. Subash; V. K. Chandrasekar; M. Lakshmanan

2014-09-15T23:59:59.000Z

446

Enhanced synchronization in an array of spin torque nano oscillators in the presence of oscillating external magnetic field  

E-Print Network [OSTI]

We demonstrate that the synchronization of an array of electrically coupled spin torque nano-oscillators (STNO) modelled by Landau-Lifshitz-Gilbert-Slonczewski (LLGS) equation can be enhanced appreciably in the presence of a common external microwave magnetic field. The applied microwave magnetic field stabilizes and enhances the regions of synchronization in the parameter space of our analysis, where the oscillators are exhibiting synchronized oscillations thereby emitting improved microwave power. To characterize the synchronized oscillations we have calculated the locking range in the domain of external source frequency.

B. Subash; V. K. Chandrasekar; M. Lakshmanan

2014-12-23T23:59:59.000Z

447

Evidence for neutrino oscillations in the Sudbury Neutrino Observatory  

SciTech Connect (OSTI)

The Sudbury Neutrino Observatory (SNO) is a large-volume heavy water Cerenkov detector designed to resolve the solar neutrino problem. SNO observes charged-current interactions with electron neutrinos, neutral-current interactions with all active neutrinos, and elastic-scattering interactions primarily with electron neutrinos with some sensitivity to other flavors. This dissertation presents an analysis of the solar neutrino flux observed in SNO in the second phase of operation, while {approx}2 tonnes of salt (NaCl) were dissolved in the heavy water. The dataset here represents 391 live days of data. Only the events above a visible energy threshold of 5.5 MeV and inside a fiducial volume within 550 cm of the center of the detector are studied. The neutrino flux observed via the charged-current interaction is [1.71 {+-} 0.065(stat.){+-}{sub 0.068}{sup 0.065}(sys.){+-}0.02(theor.)] x 10{sup 6}cm{sup -2}s{sup -1}, via the elastic-scattering interaction is [2.21{+-}0.22(stat.){+-}{sub 0.12}{sup 0.11}(sys.){+-}0.01(theor.)] x 10{sup 6}cm{sup -2}s{sup -1}, and via the neutral-current interaction is [5.05{+-}0.23(stat.){+-}{sub 0.37}{sup 0.31}(sys.){+-}0.06(theor.)] x 10{sup 6}cm{sup -2}s{sup -1}. The electron-only flux seen via the charged-current interaction is more than 7{sigma} below the total active flux seen via the neutral-current interaction, providing strong evidence that neutrinos are undergoing flavor transformation as they travel from the core of the Sun to the Earth. The most likely origin of the flavor transformation is matter-induced flavor oscillation.

Marino, Alysia Diane

2004-08-10T23:59:59.000Z

448

Water Electrolysis  

Science Journals Connector (OSTI)

In this chapter, water electrolysis technology and its applications for nuclear hydrogen ... of the chapter, a general classification of water electrolysis systems is given, the fundamentals of water electrolysis

Greg F. Naterer; Ibrahim Dincer…

2013-01-01T23:59:59.000Z

449

Water Intoxication  

E-Print Network [OSTI]

2008, May 14). Too much water raises seizure risk in babies.id=4844 9. Schoenly, Lorry. “Water Intoxication and Inmates:article/246650- overview>. 13. Water intoxication alert. (

Lingampalli, Nithya

2013-01-01T23:59:59.000Z

450

Recovery of energy from geothermal brine and other hot water sources  

DOE Patents [OSTI]

Process and system for recovery of energy from geothermal brines and other hot water sources, by direct contact heat exchange between the brine or hot water, and an immiscible working fluid, e.g. a hydrocarbon such as isobutane, in a heat exchange column, the brine or hot water therein flowing countercurrent to the flow of the working fluid. The column can be operated at subcritical, critical or above the critical pressure of the working fluid. Preferably, the column is provided with a plurality of sieve plates, and the heat exchange process and column, e.g. with respect to the design of such plates, number of plates employed, spacing between plates, area thereof, column diameter, and the like, are designed to achieve maximum throughput of brine or hot water and reduction in temperature differential at the respective stages or plates between the brine or hot water and the working fluid, and so minimize lost work and maximize efficiency, and minimize scale deposition from hot water containing fluid including salts, such as brine. Maximum throughput approximates minimum cost of electricity which can be produced by conversion of the recovered thermal energy to electrical energy.

Wahl, III, Edward F. (Claremont, CA); Boucher, Frederic B. (San Juan Capistrano, CA)

1981-01-01T23:59:59.000Z

451

Modal approximation of xenon oscillations in nuclear reactors — an FEM-based approach  

Science Journals Connector (OSTI)

A modal expansion method for modelling dynamic space-dependent effects (xenon oscillations) in large nuclear reactors is presented. Based on the finite element method (FEM), modal expansion functions for various cases with practical significance can be calculated. In this way it is possible to derive a low order state space model describing the considered effect. The use of this model in on-line controller design and simulation is intended. Modal methods in connection with modern numerical algorithms turned out to be effective to treat distributed parameter systems governed by elliptic differential equations. This will be demonstrated by application to a VVER-1000 pressurized water reactor.

J.Chr. Kalkkuhl; M.G. Döring

1993-01-01T23:59:59.000Z

452

Parasitic oscillation suppression in solid state lasers using absorbing thin films  

DOE Patents [OSTI]

A thin absorbing film is bonded onto at least certain surfaces of a solid state laser gain medium. An absorbing metal-dielectric multilayer film is optimized for a broad range of incidence angles, and is resistant to the corrosive/erosive effects of a coolant such as water, used in the forced convection cooling of the film. Parasitic oscillations hamper the operation of solid state lasers by causing the decay of stored energy to amplified rays trapped within the gain medium by total and partial internal reflections off the gain medium facets. Zigzag lasers intended for high average power operation require the ASE absorber.

Zapata, Luis E. (Livermore, CA)

1994-01-01T23:59:59.000Z

453

Decay Oscillations in Electron Capture and the Neutrino Mass Difference  

E-Print Network [OSTI]

Quantum mechanical theory disallows the model that has been used to infer the neutrino mass difference from the reported "GSI oscillations" in the rates of decay of hydrogen-like ions by electron capture. It has not been proved that the existence of mass-difference-dependent oscillations conflicts with quantum mechanics but no consistent quantum mechanical model has been shown to predict them.

Murray Peshkin

2014-03-17T23:59:59.000Z

454

Viscous Resuspension of a sediment caused by oscillating stratified flows  

E-Print Network [OSTI]

Viscous Resuspension of a sediment caused by oscillating stratified flows J. Wallner U. Schaflinger resuspension of a sediment in a Couette channel with harmonically oscillating walls. Numerical experiments reveal that the resuspension height and the particle volume concentration at the bottom of the channel

Wallner, Johannes

455

THEROLE OF ACTIVE REGIONS IN THEGENERATION OF TORSIONAL OSCILLATIONS  

E-Print Network [OSTI]

y diagram, MHD 1. Introduction Solar torsional oscillations, discovered by Howard and LaBonte (1980 oscillations as well as their phase relationship with the sunspot butter y diagram are reproduced quite nat relationship between these torsional waves, of wavenumber #24; 2=hemisphere, and the sunspot butter y diagram

Petrovay, Kristóf

456

SOLAR H{alpha} OSCILLATIONS FROM INTENSITY AND DOPPLER OBSERVATIONS  

SciTech Connect (OSTI)

Chromospheric wave activity around flares and filaments has been a research focus for years, and could provide indirect measurements of local conditions that are not otherwise accessible. One interesting observed phenomenon is oscillations in filaments, activated by distant flares and the large-scale waves they produce. Characteristics of these oscillations, such as periods, amplitudes, and lifetimes, can provide unique information about the filament. We measure oscillation properties in flares and filaments from H{alpha} chromospheric data using a new method that provides important spatial and frequency content of the dynamics. We apply the method to two flare events where filaments are observed to oscillate and determine their properties. We find strong oscillatory signal in flaring active regions in the chromosphere over a range of frequencies. Two filaments are found to oscillate without any detectable chromospheric wave acting as an activation mechanism. We find that filaments oscillate with periods of tens of minutes, but variations are significant at small spatial scales along the filamentary region. The results suggest that there is a frequency dependence of the oscillation amplitude, as well as a spatial dependence along single filaments that is more difficult to quantify. It also appears that the strength of the oscillations does not necessarily depend on the strength of the trigger, although there are other possible effects that make this conclusion preliminary. Applications of this technique to other events and different data sets will provide important new insights into the local energy densities and magnetic fields associated with dynamic chromospheric structures.

Jackiewicz, Jason [New Mexico State University, Department of Astronomy, P.O. Box 30001, MSC 4500, Las Cruces, NM 88003 (United States)] [New Mexico State University, Department of Astronomy, P.O. Box 30001, MSC 4500, Las Cruces, NM 88003 (United States); Balasubramaniam, K. S., E-mail: jasonj@nmsu.edu [Space Vehicles Directorate, Air Force Research Laboratory, Kirtland AFB, NM 87114 (United States)

2013-03-01T23:59:59.000Z

457

Grinding media oscillation: effect on torsional vibrations in tumble mills  

E-Print Network [OSTI]

of oscillation of grinding media on torsional vibrations of the mill. A theoretical model was developed to determine the oscillating frequency of the grinding media. A 12" (0.3 m) diameter tumble mill test rig was built with a 0.5 hp DC motor. The rig is tested...

Toram, Kiran Kumar

2005-11-01T23:59:59.000Z

458

A Novel Cryptochrome-Dependent Oscillator in Neurospora crassa  

E-Print Network [OSTI]

Circadian clocks are composed of molecular oscillators and are found in most eukaryotes and some prokaryotes. The fungus Neurospora crassa is a leading model for studying the clock. In N. crassa, the well-described FRQ/WCC Oscillator (FWO) consists...

Nsa, Imade Yolanda

2013-08-13T23:59:59.000Z

459

Electron Plasma Oscillations Associated with Type III Radio Bursts  

Science Journals Connector (OSTI)

...the radiation 178 kHz ( 8%) _ at the...propagat-ing electron plasma oscillations. Radia-tion...and the har--kHz % monic has been...frequencies (5 1 Mhz) the harmonic radiation...Since the electron plasma oscillations )N PLASMA 56.2 kHz ( 8%) are local...

DONALD A. GURNETT; ROGER R. ANDERSON

1976-12-10T23:59:59.000Z

460

Rhythmic Robot Arm Control Using Oscillators Matthew M. Williamson  

E-Print Network [OSTI]

Rhythmic Robot Arm Control Using Oscillators Matthew M. Williamson MIT AI Lab, 545 Technology to robot arm con- trol based on exploiting the dynamical properties of a simple oscillator circuit coupled This paper presents an approach to robot arm con- trol that is computationally simple, and provides ro- bust

Note: This page contains sample records for the topic "oscillating water column" 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

Short pulse evolution in the Boeing APLE oscillator  

Science Journals Connector (OSTI)

The Boeing average power laser experiment (APLE) oscillator is investigated using two- and three-dimensional simulations. The evolution of optical pulses in the presence of an electron pulse energy slew is examined. The most stable operation of the oscillator is found for larger values of desynchronism where the electron energy spread is minimized in preparation for input into the high power amplifier.

K.A. Sturgess; D.J. Frost; W.B. Colson

1993-01-01T23:59:59.000Z

462

Neutrino oscillations and the number of neutrino types  

Science Journals Connector (OSTI)

A brief treatment of neutrino oscillations, generalized to an arbitrary number of neutrino types, is given as the basis for design of a feasible experiment to search for neutrino oscillations using the neutrino beam produced at a high-energy proton accelerator.

A. K. Mann and H. Primakoff

1977-02-01T23:59:59.000Z

463

Short communication Dynamics of microbubble oscillators with delay coupling  

E-Print Network [OSTI]

Differential delay equation Perturbation theory Hopf bifurcation a b s t r a c t We investigate the stability of the in-phase mode in a system of two delay-coupled bubble oscillators. The bubble oscillator model to travel from one bubble to another through the liquid medium that surrounds them. Using techniques from

Rand, Richard H.

464

Number of negative modes of the oscillating bounces  

SciTech Connect (OSTI)

The spectrum of small perturbations about oscillating bounce solutions recently discussed in the literature is investigated. Our study supports quite intuitive and expected result: the bounce with N nodes has exactly N homogeneous negative modes. Existence of more than one negative modes makes obscure the relation of these oscillating bounce solutions to the false vacuum decay processes.

Lavrelashvili, George [Department of Theoretical Physics, University of Geneva, 24 quai Ernest-Ansermet, CH 1211 Geneva 4 (Switzerland) and Department of Theoretical Physics, A.Razmadze Mathematical Institute, GE 0193 Tbilisi (Georgia)

2006-04-15T23:59:59.000Z

465

Seismology and geodesy of the sun: Low-frequency oscillations  

Science Journals Connector (OSTI)

...each of four separate parts of the data string, a total of 16 coefficients agree...modes] probably can be ex- cluded. Oscillating frequencies as low as those discussed...of the sun this force disappears. The oscillating amplitude is strongly attenuated through...

R. H. Dicke

1981-01-01T23:59:59.000Z

466

The oceanic excitation hypothesis for the continuous oscillations of the Earth  

E-Print Network [OSTI]

Incessant excitation of the Earth’s free oscillations, EarthK. & Fukao, Y. , 1998. Earth’s background free oscillations,oscillations: atmosphere–solid Earth coupling, Annu. Rev.

Tanimoto, T

2005-01-01T23:59:59.000Z

467

Removal of ammonia from tarry water using a tubular furnace  

SciTech Connect (OSTI)

An ammonia-processing system without the use of live steam from OAO Alchevskkoks plant's supply network is considered. Steam obtained from the wastewater that leaves the ammonia column is used to process the excess tarry water, with the release of volatile ammonia.

V.V. Grabko; V.A. Kofanova; V.M. Li; M.A. Solov'ev [Giprokoks, the State Institute for the Design of Coke-Industry Enterprises, Kharkov (Ukraine)

2009-07-15T23:59:59.000Z

468

MHK Technologies/Vortex Oscillation | Open Energy Information  

Open Energy Info (EERE)

Oscillation Oscillation < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Vortex Oscillation.jpg Technology Profile Primary Organization Vortex Oscillation Technology Ltd Technology Resource Click here Current Technology Type Click here Attenuator Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description If cylinder or another body is fixed on a moving bonding this force can set the body or its separate parts into oscillation e g elastic slat If the system of mechanical energy output is organized correctly this device can be considered as generator Technology Dimensions Device Testing Date Submitted 08:12.7 << Return to the MHK database homepage Retrieved from

469

MHK Technologies/Yu Oscillating Generator YOG | Open Energy Information  

Open Energy Info (EERE)

Oscillating Generator YOG Oscillating Generator YOG < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Yu Oscillating Generator YOG.jpg Technology Profile Primary Organization Yu Energy Corp Technology Resource Click here Wave Technology Type Click here Oscillating Wave Surge Converter Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description By harnessing force located on top of the device s mast Known as a form of actuator You would get a levered mechanical gain converted to torque for a period of time oscillating the lower half side to side The lower half will then drive a turbine producing power As it slows due to resistance the actuator will harness force again to drive the device Making up for any loss motion do to resistance

470

A pair of oscillators interacting with a common heat bath  

E-Print Network [OSTI]

Here the problem considered is that of a pair of oscillators coupled to a common heat bath. Many, if not most, discussions of a single operator coupled to a bath have used the independent oscillator model of the bath. However, that model has no notion of separation, so the question of phenomena when the oscillators are near one another compared with when they are widely separated cannot be addressed. Here the Lamb model of an oscillator attached to a stretched string is generalized to illustrate some of these questions. The coupled Langevin equations for a pair of oscillators attached to the string at different points are derived and their limits for large and small separations obtained. Finally, as an illustration of a different phenomenon, the fluctuation force between a pair of masses attached to the string is calculated, with closed form expressions for the force at small and large separations.

G. W. Ford; R. F. O'Connell

2014-08-25T23:59:59.000Z

471

Optimized regulator for the quantized anharmonic oscillator  

E-Print Network [OSTI]

The energy gap between the first excited state and the ground state is calculated for the quantized anharmonic oscillator in the framework of the functional renormalization group method. The compactly supported smooth regulator is used which includes various types of regulators as limiting cases. It was found that the value of the energy gap depends on the regulator parameters. We argue that the optimization based on the disappearance of the false, broken symmetric phase of the model leads to the Litim's regulator. The least sensitivity on the regulator parameters leads however to an IR regulator being somewhat different of the Litim's one, but it can be described as a perturbatively improved, or generalized Litim's regulator and provides analytic evolution equations, too.

J. Kovacs; S. Nagy; K. Sailer

2014-03-14T23:59:59.000Z

472

Neutrino energy reconstruction problems and neutrino oscillations  

E-Print Network [OSTI]

We discuss the accuracy of the usual procedure for neutrino energy reconstruction which is based on the quasielastic kinematics. Our results are described in terms of a probability distribution for a real neutrino energy value. Several factors are responsible of the deviations from the reconstructed value. The main one is the multinucleon component of the neutrino interaction which in the case of Cherenkov detectors enters as a quasielastic cross section, increasing the mean neutrino energy which can differ appreciably from the reconstructed value. As an application we derive, for excess electron events attributed to the conversion of muon neutrinos, the true neutrino energy distribution based on the experimental one which is given in terms of the reconstructed value. The result is a reshaping effect. For MiniBooNE the low energy peak is suppressed and shifted at higher energies, which may influence the interpretation in terms of oscillation. For T2K at the Super Kamiokande far detector the reshaping translat...

Martini, M; Chanfray, G

2012-01-01T23:59:59.000Z

473

Dynamics of an oscillating Stirling heat pump  

Science Journals Connector (OSTI)

Abstract In this paper, a promising heat pump based on Stirling technology is examined. Based on the volume variation produced by the oscillating displacement of two pistons, the advantages of this particular system lie in the elimination of a transmission mechanism, as the driving machines are directly coupled to the working pistons, and in the use of environmentally friendly working gases. The system is analysed by coupling the dynamics to an isothermal model of the Stirling cycle. A methodology is proposed to preliminarily size this type of heat pump based on simulations performed on a mathematical model built in MATLAB. The stability of operation is analysed by considering possible changes in working conditions. Actions are proposed to minimize the effect of these changes on the performance of the system.

I. Barreno; S.C. Costa; M. Cordon; I. Urrutibeascoa; X. Gomez; M. Mateos

2014-01-01T23:59:59.000Z

474

Utilising HVDC to damp power oscillations  

SciTech Connect (OSTI)

In this paper, damping of slow oscillations with active and reactive power modulation of HVDC-links is analyzed with the aim of gaining a physical insight into the problem. The analysis shows that active power modulation is efficient when applied to a short mass-scaled electrical distance from one of the swinging machines, and reactive power modulation is most efficient when there exists a well-defined power flow direction and the modulation is made at a point close to the electrical midpoint between the swinging machines. It is shown that the intuitively appealing feedback signals frequency and derivative of the voltage are appropriate for active and reactive power modulation, respectively. The impact of the constraints imposed by the HVDC equations are analyzed, and it is determined when the implicit reactive power modulation resulting from constant [gamma] control may be detrimental for the damping.

Smed, T.; Andersson, G. (Royal Inst. of Technology, Stockholm (Sweden). Dept. of Electric Power Systems)

1993-04-01T23:59:59.000Z

475

Annular wave packets at Dirac points and probability oscillation in graphene  

E-Print Network [OSTI]

Wave packets in graphene whose central wave vector is at Dirac points are investigated by numerical calculations. Starting from an initial Gaussian function, these wave packets form into annular peaks that propagate to all directions like ripple-rings on water surface. At the beginning, electronic probability alternates between the central peak and the ripple-rings and transient oscillation occurs at the center. As time increases, the ripple-rings propagate at the fixed Fermi speed, and their widths remain unchanged. The axial symmetry of the energy dispersion leads to the circular symmetry of the wave packets. The fixed speed and widths, however, are attributed to the linearity of the energy dispersion. Interference between states that respectively belong to two branches of the energy dispersion leads to multiple ripple-rings and the probability-density oscillation. In a magnetic field, annular wave packets become confined and no longer propagate to infinity. If the initial Gaussian width differs greatly from the magnetic length, expanding and shrinking ripple-rings form and disappear alternatively in a limited spread, and the wave packet resumes the Gaussian form frequently. The probability thus oscillates persistently between the central peak and the ripple-rings. If the initial Gaussian width is close to the magnetic length, the wave packet retains the Gaussian form and its height and width oscillate with a period determined by the first Landau energy. The wave-packet evolution is determined jointly by the initial state and the magnetic field, through the electronic structure of graphene in a magnetic field.

Ji Luo; Junqiang Lu; Daniel Valencia

2011-08-12T23:59:59.000Z

476

Solar Oscillations As a considerable number of reviews have been written on the subject of solar oscillations, and  

E-Print Network [OSTI]

the input to the first inversions for the radial dependence of the solar rotation rate (Duvall, et al. 1984Chapter 2 Solar Oscillations As a considerable number of reviews have been written on the subject of solar oscillations, and as this thesis is mainly concerned with the various stages of the reduction

Schou, Jesper

477

E-Print Network 3.0 - accuracy neutrino oscillation Sample Search...  

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

evidence that neutrinos oscillate 3. In other words, they transform... Observatory in Canada provided beautiful experimental evidence of neutrino oscillations using solar...

478

Marketing water  

E-Print Network [OSTI]

management, water conservation programs Story by Kathy Wythe tx H2O | pg. 17 public information programs and materials that increase awareness about regional water issues. The company recently opened the TecH2O, a water resource learning center...tx H2O | pg. 16 W ith rapid population growth and the memory of the worst drought in 50 years, cities and groups are promoting programs that educate their constituents about water quality, water conservation, and landscape management. Many...

Wythe, Kathy

2008-01-01T23:59:59.000Z

479

Constrained water cloud generator  

Science Journals Connector (OSTI)

The fast generation of large cloudy volumes with imposed cloud cover fractions and ambient vertical profiles is very important for the realistic simulation of atmospheric scenes. The model proposed here is the second step of a two-step model composed on the one hand of a volume generator based on a Fourier filtering method and on the other hand of a physical generator filling the volume with physical parameters. After a description of the general generation scheme, this paper focuses on the simulation of vertical profiles of water content (liquid, vapour) coupled with other state parameters (temperature, pressure, vertical velocity) via thermodynamic and hydrodynamic equations by local forcing of ambient conditions. The method for solving these equations is explained and applied to practical cases. First, by assuming that the actual temperature at the cloud base is equal to the dew temperature and by imposing a moist pseudo-adiabatic temperature gradient between the cloud top and bottom, the temperature profile in the cloud is found. When conditional instability occurs, the initial temperature profile between the ground and the cloud base is iteratively shifted to lower values until absolute stability is reached. Then the liquid water content is calculated by integrating the equation of water conservation, and the water vapour content by assuming that the cloud is everywhere saturated. Eventually, the vertical velocity is estimated by integration of the momentum equation. This method gives results in good agreement with published measurements, analytical and numerical models. Eventually, further developments of the column model, including the effects of phase transitions, turbulence, horizontal motions and mixing with the surrounding medium, are proposed in the concluding section.

Roland P.H. Berton

2008-01-01T23:59:59.000Z

480

New Method for Evaluating Irreversible Adsorption and Stationary Phase Bleed in Gas Chromatographic Capillary Columns  

SciTech Connect (OSTI)

A novel method for the evaluation of gas chromatographic (GC) column inertness has been developed using a tandem GC approach. Typically column inertness is measured by analyte peak shape evaluation. In general, silica, glass, and metal surfaces are chemically reactive and can cause analyte adsorption, which typically is observed as chromatographic peak tailing. Adsorption processes produce broad, short chromatographic peaks that confound peak area determinations because a significant portion can reside in the noise. In addition, chromatographic surfaces and stationary phases can irreversibly adsorb certain analytes without obvious degradation of peak shape. The inertness measurements described in this work specifically determine the degree of irreversible adsorption behavior of specific target compounds at levels ranging from approximately 50 picograms to 1 nanogram on selected gas chromatographic columns. Chromatographic columns with 5% phenylmethylsiloxane, polyethylene glycol (wax), trifluoropropylsiloxane, and 78% cyanopropylsiloxane stationary phases were evaluated with a variety of phosphorus- and sulfur- containing compounds selected as test compounds due to their ease of adsorption and importance in trace analytical detection. In addition, the method was shown effective for characterizing column bleed.

Wright, Bob W.; Wright, Cherylyn W.

2012-10-26T23:59:59.000Z

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


481

Neutrino Burst from Supernovae and Neutrino Oscillation  

Science Journals Connector (OSTI)

......solar, atmospheric, reactor neutrinos and so on...anti-neutrinos from nuclear reactors, spal- lation products...atmospheric, and reactor neutrinos. (Since...is expected that next generation of water Cherenkov detectors......

Katsuhiko Sato; Keitaro Takahashi; Shin'ichiro Ando

2002-03-01T23:59:59.000Z

482

SLOW MAGNETOACOUSTIC OSCILLATIONS IN THE MICROWAVE EMISSION OF SOLAR FLARES  

SciTech Connect (OSTI)

Analysis of the microwave data, obtained in the 17 GHz channel of the Nobeyama Radioheliograph during the M1.6 flare on 2010 November 4, revealed the presence of 12.6 minute oscillations of the emitting plasma density. The oscillations decayed with the characteristic time of about 15 minutes. Similar oscillations with the period of about 13.8 minutes and the decay time of 25 minutes are also detected in the variation of EUV emission intensity measured in the 335 A channel of the Solar Dynamics Observatory/Atmospheric Imaging Assembly. The observed properties of the oscillations are consistent with the oscillations of hot loops observed by the Solar and Heliospheric Observatory/Solar Ultraviolet Measurement of Emitted Radiation (SUMER) in the EUV spectra in the form of periodic Doppler shift. Our analysis presents the first direct observations of the slow magnetoacoustic oscillations in the microwave emission of a solar flare, complementing accepted interpretations of SUMER hot loop oscillations as standing slow magnetoacoustic waves.

Kim, S.; Shibasaki, K. [Nobeyama Solar Radio Observatory/NAOJ, Nagano 384-1305 (Japan); Nakariakov, V. M., E-mail: sjkim@nro.nao.ac.jp [Physics Department, University of Warwick, Coventry, CV4 7AL (United Kingdom)

2012-09-10T23:59:59.000Z

483

Tests of Monte Carlo Independent Column Approximation With a Mixed-Layer Ocean Model  

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

Tests of Monte Carlo Independent Column Tests of Monte Carlo Independent Column Approximation With a Mixed-Layer Ocean Model Petri Simo Järvenoja Heikki Järvinen Räisänen Finnish Meteorological Institute Figure 1. Root-mean-square sampling errors in local instant- aneous total (LW+SW) net flux at the surface and total radiative heating rate for the 1COL, CLDS, and REF approaches. Global rms values are given at the upper right hand corner of the plots. 1. Introduction The Monte Carlo Independent Column Approximation (McICA) separates the description of unresolved cloud structure from the radiative transfer solver very flexible ! unbiased with respect to ICA ! However, the radiative fluxes and heating rates contain conditional random errors ("McICA noise"). ? The topic of this poster: All previous tests of McICA

484

Tests of Monte Carlo Independent Column Approximation in the ECHAM5  

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

Tests of Monte Carlo Independent Column Approximation in the ECHAM5 Tests of Monte Carlo Independent Column Approximation in the ECHAM5 Atmospheric GCM Raisanen, Petri Finnish Meteoroligical Institute Jarvenoja, Simo Finnish Meteorological Institute Jarvinen, Heikki Finnish Meteorological Institute Category: Modeling The Monte Carlo Independent Column Approximation (McICA) was recently introduced as a new approach for parametrizing broadband radiative fluxes in global climate models (GCMs). The McICA allows a flexible description of unresolved cloud structure, and it is unbiased with respect to the full ICA, but its results contain conditional random errors (i.e., noise). In this work, McICA and a stochastic cloud generator have been implemented to the Max Planck Institute for Meteorology's ECHAM5 atmospheric GCM. The

485

One ARM, Two Columns and a Whole Lot of Aerosols | Department of Energy  

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

ARM, Two Columns and a Whole Lot of Aerosols ARM, Two Columns and a Whole Lot of Aerosols One ARM, Two Columns and a Whole Lot of Aerosols July 25, 2012 - 5:49pm Addthis This observatory is part of an air particles research initiative at Cape Cod National Seashore in Massachusetts, and includes dozens of sophisticated instruments that take continuous ground-based measurements of clouds, aerosols, and other atmospheric properties. | Photo courtesy of the ARM Climate Research Facility. This observatory is part of an air particles research initiative at Cape Cod National Seashore in Massachusetts, and includes dozens of sophisticated instruments that take continuous ground-based measurements of clouds, aerosols, and other atmospheric properties. | Photo courtesy of the ARM Climate Research Facility.

486

Analysis of Dynamic Behavior of a Thermally Coupled Distillation Column Implemented on a Process with Recycles  

Science Journals Connector (OSTI)

Abstract Nowadays, the installation and operation of systems with minimum energy and material consumption is a main objective in the industrial ambit; this goal can be achieved through the implementation of recycle streams to recover raw materials and the use of energy integration techniques to minimize utilities requirements. However, when a process is highly integrated, e.g. processes with recycle streams and energy integration or thermal couplings, systems can present control problems. Several studies for Reactor-Separation-Recycle (RSR) systems using separation systems with conventional distillation columns have been reported, but few works have focused on energy-integrated columns or thermally coupled distillation sequences. This work presents a comparison between the dynamic behavior of a thermally coupled distillation column with side rectifier implemented within a RSR system and that obtained with a conventional distillation sequence.

D. Mascote-Pérez; A. Sánchez-Hijar; N. Ramírez-Corona; A. Jiménez-Gutierrez

2012-01-01T23:59:59.000Z

487

First Commissioning of a Cryogenic Distillation Column for Low Radioactivity Underground Argon  

E-Print Network [OSTI]

We report on the performance and commissioning of a cryogenic distillation column for low radioactivity underground argon at Fermi National Accelerator Laboratory. The distillation column is designed to accept a mixture of argon, helium, and nitrogen and return pure argon with a nitrogen contamination less than 10 ppm. In the first commissioning, we were able to run the distillation column in a continuous mode and produce argon that is 99.9% pure. After running in a batch mode, the argon purity was increased to 99.95%, with 500 ppm of nitrogen remaining. The efficiency of collecting the argon from the gas mixture was between 70% and 81%, at an argon production rate of 0.84-0.98 kg/day.

H. O. Back; T. Alexander; A. Alton; C. Condon; E. de Haas; C. Galbiati; A. Goretti; T. Hohmann; An. Ianni; C. Kendziora; B. Loer; D. Montanari; P. Mosteiro; S. Pordes

2012-04-26T23:59:59.000Z

488

Novel bias-field-free spin transfer oscillator  

SciTech Connect (OSTI)

Two versions of magnetic field free spin torque oscillators with in- and out-of-plane spin polarizers are proposed. The field free spin torque oscillators comprise two spin valve stacks with a common free magnetic layer featuring an out-of-plane anisotropy. Their operation frequencies are controlled by the dimensions of the free layer and can also be tuned by the applied currents. Large and stable magnetization precessional motion of the whole shared free layer for both oscillators are obtained. The structure with in-plane polarizers allows more efficient microwave power extraction of the large in-plane magnetization precession of the free layer.

Windbacher, Thomas, E-mail: windbacher@iue.tuwien.ac.at; Makarov, Alexander; Mahmoudi, Hiwa; Sverdlov, Viktor; Selberherr, Siegfried [Institute for Microelectronics, TU Wien, Gußhausstraße 27–29/E360, A-1040 Wien (Austria)

2014-05-07T23:59:59.000Z

489

Solar-like oscillations in a massive star  

E-Print Network [OSTI]

Seismology of stars provides insight into the physical mechanisms taking place in their interior, with modes of oscillation probing different layers. Low-amplitude acoustic oscillations excited by turbulent convection were detected four decades ago in the Sun and more recently in low-mass main-sequence stars. Using data gathered by the Convection Rotation and Planetary Transits mission, we report here on the detection of solar-like oscillations in a massive star, V1449 Aql, which is a known large-amplitude (b Cephei) pulsator.

Belkacem, K; Goupil, M -J; Lefèvre, L; Baudin, F; Deheuvels, S; Dupret, M -A; Appourchaux, T; Scuflaire, R; Auvergne, M; Catala, C; Michel, E; Miglio, A; Montalban, J; Thoul, A; Talon, S; Baglin, A; Noels, A

2009-01-01T23:59:59.000Z

490

Low-frequency oscillations of forced barotropic flow  

SciTech Connect (OSTI)

Jin and Ghil demonstrate that for topographically resonant flow, low-frequency finite-amplitude oscillations may arise from wave -- wave interactions and topographic form drag. Their model is extended to include a zonally asymmetric vorticity source, which is shown to interact with the perturbation field to produce zonally rectified wave fluxes that dramatically alter the Hopf bifurcation from stationary solutions to low-frequency oscillations. The frequency, intensity, and general character of these oscillations are shown to depend crucially upon the phasing and relative strength of the forcings.

Nathan, T.R.; Barcilon, A. (Univ. of California, Davis, CA (United States) The Florida State Univ., Tallahassee, FL (United States))

1994-02-01T23:59:59.000Z

491

Coherence resonance in an unijunction transistor relaxation oscillator  

E-Print Network [OSTI]

The phenomenon of coherence resonance (CR) is investigated in an unijunction transistor relaxation oscillator (UJT-RO) and quantified by estimating the normal variance (NV). Depending upon the measuring points two types of NV curves have been obtained. We have observed that the degradations in coherency at higher noise amplitudes in our system is probably the result of direct interference of coherent oscillations and the stochastic perturbation. Degradation of coherency may be minimal if this direct interference of noise and coherent oscillations is eliminated.

Md. Nurujjaman; P. S. Bhattacharya; A. N. Sekar Iyengar; Sandip Sarkar

2009-02-02T23:59:59.000Z

492

Thermal self-oscillations in radiative heat exchange  

E-Print Network [OSTI]

We report the effect of relaxation-type self-induced temperature oscillations in the system of two parallel plates of SiO$_2$ and VO$_2$ which exchange heat by thermal radiation in vacuum. The nonlinear feedback in the self-oscillating system is provided by metal-insulator transition in VO$_2$. Using the method of fluctuational electrodynamics we show that under the action of external laser of a constant power, the temperature of VO$_2$ plate oscillates around its phase transition value.

Dyakov, Sergey; Yan, Min; Qiu, Min

2014-01-01T23:59:59.000Z

493

MSN YYYYMM Value Column Order Description Unit FFPRBUS Total Fossil Fuels Production Quadrillion Btu  

Gasoline and Diesel Fuel Update (EIA)

MSN YYYYMM Value Column Order Description Unit MSN YYYYMM Value Column Order Description Unit FFPRBUS Total Fossil Fuels Production Quadrillion Btu FFPRBUS Total Fossil Fuels Production Quadrillion Btu FFPRBUS Total Fossil Fuels Production Quadrillion Btu FFPRBUS Total Fossil Fuels Production Quadrillion Btu FFPRBUS Total Fossil Fuels Production Quadrillion Btu FFPRBUS Total Fossil Fuels Production Quadrillion Btu FFPRBUS Total Fossil Fuels Production Quadrillion Btu FFPRBUS Total Fossil Fuels Production Quadrillion Btu FFPRBUS Total Fossil Fuels Production Quadrillion Btu FFPRBUS Total Fossil Fuels Production Quadrillion Btu FFPRBUS Total Fossil Fuels Production Quadrillion Btu FFPRBUS Total Fossil Fuels Production Quadrillion Btu FFPRBUS Total Fossil Fuels Production Quadrillion Btu FFPRBUS Total Fossil Fuels Production Quadrillion Btu

494

Anthropogenic NO2 in the Atmosphere: Estimates of the Column Content and Radiative Forcing  

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

Anthropogenic NO Anthropogenic NO 2 in the Atmosphere: Estimates of the Column Content and Radiative Forcing A. N. Rublev Institution of Molecular Physics Russian Research Center Kurchatov Institute Moscow, Russia N Chubarova Meteorological Observatory of Moscow State University Moscow, Russia G. Gorchakov Obukhov Institute of Atmospheric Physics Russian Academy of Sciences Moscow, Russia Introduction The work summarizes the different methodical aspects, firstly, the use of atmosphere optical depths presented in Aerosol Robotic Network (AERONET) data for NO 2 column retrievals, and, secondly, its radiative forcing calculated as difference between integral solar fluxes absorbed in the atmosphere with and without NO 2 under given air mass or the sun zenith angle.

495

An investigation of the buckling criteria of columns that have large angles of initial twist  

E-Print Network [OSTI]

COECLUSIONS A1G) RECOMME?3)ATIONS It is evident from the data presented in Figure 9 that no substantial change in the buckling criteria oc- curs as the result of initial twist up to 1/16 turn per inch of length. In general, the (L/r) values could... of the equations which are applicable to columns that have hinged end conditions. Experimental results from the buckling character- istics of a stepped column constructed of twisted ele- ments indicated further that no substantial change in the buckling...

Jordan, Basil Magee, Jr

2012-06-07T23:59:59.000Z

496

THERMAL ANALYSIS FOR IN-TANK ION-EXCHANGE COLUMN PROCESS  

SciTech Connect (OSTI)

High Level Waste (HLW) at the Savannah River Site (SRS) is stored in three forms: sludge, saltcake, and supernate. A small column ion-exchange (SCIX) process is being designed to treat dissolved saltcake waste before feeding it to the saltstone facility to be made into grout. The waste is caustic with high concentrations of various sodium salts and lower concentrations of radionuclides. Two cation exchange media being considered are a granular form of crystalline silicotitanate (CST) and a spherical form of resorcinol-formaldehyde (RF) resin. CST is an inorganic material highly selective for cesium that is not elutable. Through this process, radioactive cesium from the salt solution is absorbed into ion exchange media (either CST or RF) which is packed within a flow-through column. A packed column loaded with radioactive cesium generates significant heat from radiolytic decay. If engineering designs cannot handle this thermal load, hot spots may develop locally which could degrade the performance of the ion-exchange media. Performance degradation with regard to cesium removal has been observed between 50 and 80 C for CST [1] and at 65 C for RF resin [2]. In addition, the waste supernate solution will boil around 130 C. If the columns boiled dry, the sorbent material could plug the column and lead to replacement of the entire column module. Alternatively, for organic resins such as RF there is risk of fire at elevated temperatures. The objective of the work is to compute temperature distributions across CST- and RF-packed columns immersed in waste supernate under accident scenarios involving loss of salt solution flow through the beds and, in some cases, loss of coolant system flow. For some cases, temperature distributions are determined as a function of time after the initiation of a given accident scenario and in other cases only the final steady-state temperature distributions are calculated. In general, calculations are conducted to ensure conservative and bounding results for the maximum temperatures achievable using the current baseline column design. This information will assist in SCIX design and facility maintenance.

Lee, S; Frank02 Smith, F

2009-01-05T23:59:59.000Z

497

Two surface plasmon decay of plasma oscillations  

E-Print Network [OSTI]

The interaction of ultra-intense lasers with solid foils can be used to accelerate ions to high energies well exceeding 60 MeV. The non-linear relativistic motion of electrons in the intense laser radiation leads to their acceleration and later to the acceleration of ions. Ions can be accelerated from the front surface, the foil interior region, and the foil rear surface (TNSA, most widely used), or the foil may be accelerated as a whole if sufficiently thin (RPA). Here, we focus on the most widely used mechanism for laser ion-acceleration of TNSA. Starting from perfectly flat foils we show by simulations how electron filamentation at or inside the solid leads to a spatial modulations in the ions. The exact dynamics depend very sensitively on the chosen initial parameters which has a tremendous effect on electron dynamics. In the case of step-like density gradients we find evidence that suggests a two-surface-plasmon decay of plasma oscillations triggering a Raileigh-Taylor-like instability.

Kluge, Thomas; Zeil, Karl; Bussmann, Michael; Schramm, Ulrich; Cowan, Thomas E

2015-01-01T23:59:59.000Z

498

Space-independent xenon oscillations revisited  

SciTech Connect (OSTI)

Recently, various branches of engineering and science have seen a rapid increase in the number of dynamical analyses undertaken. This modern phenomenon often obscures the fact that such analyses were sometimes carried out even before the current trend began. Moreover, these earlier analyses, which even now seem very ingenuous, were carried out at a time when the available information about dynamical systems was not as well disseminated as it is today. One such analysis, carried out in the early 1960s, showed the existence of stable limit cycles in a simple model for space-independent xenon dynamics in nuclear reactors. The authors, apparently unaware of the now well-known bifurcation theorem by Hopf, could not numerically discover unstable limit cycles, though they did find regions in parameter space where the fixed points are stable for small perturbations but unstable for very large perturbations. The analysis was carried out both analytically and numerically. As a tribute to these early nonlinear dynamicists in the field of nuclear engineering, in this paper, the Hopf theorem and its conclusions are briefly described, and then the solution of the space-independent xenon oscillation problem is presented, which was obtained using the bifurcation analysis BIFDD code. These solutions are presented along with a discussion of the earlier results.

Rizwan-uddin (Univ. of Virginia, Charlottesville (USA))

1989-01-01T23:59:59.000Z

499

Casimir Friction Force for Moving Harmonic Oscillators  

E-Print Network [OSTI]

Casimir friction is analyzed for a pair of dielectric particles in relative motion. We first adopt a microscopic model for harmonically oscillating particles at finite temperature T moving non-relativistically with constant velocity. We use a statistical-mechanical description where time-dependent correlations are involved. This description is physical and direct, and, in spite of its simplicity, is able to elucidate the essentials of the problem. This treatment elaborates upon, and extends, an earlier theory of ours back in 1992. The energy change Delta E turns out to be finite in general, corresponding to a finite friction force. In the limit of zero temperature the formalism yields, however, Delta E ->0, this being due to our assumption about constant velocity, meaning slowly varying coupling. For couplings varying more rapidly, there will also be a finite friction force at T=0. As second part of our work, we consider the friction problem using time-dependent perturbation theory. The dissipation, basically a second order effect, is obtainable with the use of first order theory, the reason being the absence of cross terms due to uncorrelated phases of eigenstates. The third part of the present paper is to demonstrate explicitly the equivalence of our results with those recently obtained by Barton (2010); this being not a trivial task since the formal results are seemingly quite different from each other.

Johan S. Høye; Iver Brevik

2011-11-21T23:59:59.000Z

500

Neutrino energy reconstruction problems and neutrino oscillations  

Science Journals Connector (OSTI)

We discuss the accuracy of the usual procedure for neutrino energy reconstruction which is based on the quasielastic kinematics. Our results are described in terms of a probability distribution for a real neutrino energy value. Several factors are responsible for the deviations from the reconstructed value. The main one is the multinucleon component of the neutrino interaction which in the case of Cherenkov detectors enters as a quasielastic cross section, increasing the mean neutrino energy which can differ appreciably from the reconstructed value. As an application we derive, for excess electron events attributed to the conversion of muon neutrinos, the true neutrino energy distribution based on the experimental one which is given in terms of the reconstructed value. The result is a reshaping effect. For MiniBooNE the low energy peak is suppressed and shifted at higher energies, which may influence the interpretation in terms of oscillation. For T2K at the Super Kamiokande far detector the reshaping translates into a narrowing of the energy distribution.

M. Martini; M. Ericson; G. Chanfray

2012-05-21T23:59:59.000Z