National Library of Energy BETA

Sample records for optical depth precipitable

  1. Determining Nighttime Atmospheric Optical Depth Using Mars Exploration Rover Images 

    E-Print Network [OSTI]

    Bean, Keri Marie

    2013-07-22

    was compared to the expected flux to give nighttime optical depth values. The observed nighttime optical depth was consistently similar to the daytime optical depth values on both an individual image and sol-averaged basis. Recommendations are made going...

  2. Global longterm passive microwave satellitebased retrievals of vegetation optical depth

    E-Print Network [OSTI]

    Evans, Jason

    Global longterm passive microwave satellitebased retrievals of vegetation optical depth Yi Y. Liu,1 optical depth (VOD) retrievals from three satellitebased passive microwave instruments were merged longterm passive microwave satellitebased retrievals of vegetation optical depth, Geophys. Res. Lett., 38

  3. Solid precipitation on a tropical glacier in Bolivia measured with an ultrasonic depth gauge

    E-Print Network [OSTI]

    Berthier, Etienne

    Solid precipitation on a tropical glacier in Bolivia measured with an ultrasonic depth gauge Jean effect produces precipitation at midday in the Andean valleys and in the afternoon in the high mountains the main source of melting energy. INDEX TERMS: 3354 Meteorology and Atmospheric Dynamics: Precipitation

  4. Hyperspectral Aerosol Optical Depths from TCAP Flights

    SciTech Connect (OSTI)

    Shinozuka, Yohei; Johnson, Roy R.; Flynn, Connor J.; Russell, P. B.; Schmid, Beat; Redemann, Jens; Dunagan, Stephen; Kluzek, Celine D.; Hubbe, John M.; Segal-Rosenheimer, Michal; Livingston, J. M.; Eck, T.; Wagener, Richard; Gregory, L.; Chand, Duli; Berg, Larry K.; Rogers, Ray; Ferrare, R. A.; Hair, John; Hostetler, Chris A.; Burton, S. P.

    2013-11-13

    4STAR (Spectrometer for Sky-Scanning, Sun-Tracking Atmospheric Research), the world’s first hyperspectral airborne tracking sunphotometer, acquired aerosol optical depths (AOD) at 1 Hz during all July 2012 flights of the Two Column Aerosol Project (TCAP). Root-mean square differences from AERONET ground-based observations were 0.01 at wavelengths between 500-1020 nm, 0.02 at 380 and 1640 nm and 0.03 at 440 nm in four clear-sky fly-over events, and similar in ground side-by-side comparisons. Changes in the above-aircraft AOD across 3-km-deep spirals were typically consistent with integrals of coincident in situ (on DOE Gulfstream 1 with 4STAR) and lidar (on NASA B200) extinction measurements within 0.01, 0.03, 0.01, 0.02, 0.02, 0.02 at 355, 450, 532, 550, 700, 1064 nm, respectively, despite atmospheric variations and combined measurement uncertainties. Finer vertical differentials of the 4STAR measurements matched the in situ ambient extinction profile within 14% for one homogeneous column. For the AOD observed between 350-1660 nm, excluding strong water vapor and oxygen absorption bands, estimated uncertainties were ~0.01 and dominated by (then) unpredictable throughput changes, up to +/-0.8%, of the fiber optic rotary joint. The favorable intercomparisons herald 4STAR’s spatially-resolved high-frequency hyperspectral products as a reliable tool for climate studies and satellite validation.

  5. Aerosol Optical Depth Value-Added Product Report

    SciTech Connect (OSTI)

    Koontz, A; Hodges, G; Barnard, J; Flynn, C; Michalsky, J

    2013-03-17

    This document describes the process applied to retrieve aerosol optical depth (AOD) from multifilter rotating shadowband radiometers (MFRSR) and normal incidence multifilter radiometers (NIMFR) operated at the ARM Climate Research Facility’s ground-based facilities.

  6. Retrievals of cloud optical depth and effective radius from Thin-Cloud Rotating Shadowband Radiometer measurements

    E-Print Network [OSTI]

    Retrievals of cloud optical depth and effective radius from Thin-Cloud Rotating Shadowband December 2011. [1] A Thin-Cloud Rotating Shadowband Radiometer (TCRSR) was developed and deployed) through an optically thin cloud (optical depth

  7. ARM: 10-minute Raman Lidar: aerosol depolarization profiles and single layer cloud optical depths from first Turner algorithm

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

    Chitra Sivaraman; Connor Flynn

    1998-03-01

    10-minute Raman Lidar: aerosol depolarization profiles and single layer cloud optical depths from first Turner algorithm

  8. ARM: 10-minute Raman Lidar: aerosol depolarization profiles and single layer cloud optical depths from first Turner algorithm

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

    Chitra Sivaraman; Connor Flynn

    10-minute Raman Lidar: aerosol depolarization profiles and single layer cloud optical depths from first Turner algorithm

  9. Aerosol Optical Depth Prediction from Satellite Observations by Multiple Instance Regression

    E-Print Network [OSTI]

    Vucetic, Slobodan

    Aerosol Optical Depth Prediction from Satellite Observations by Multiple Instance Regression airborne particles that both reflect and absorb incoming solar radiation and whose effect on the Earth the satellite measure- ments, the common objective is prediction of Aerosol Opti- cal Depth (AOD). An important

  10. LINKING Ly? AND LOW-IONIZATION TRANSITIONS AT LOW OPTICAL DEPTH

    SciTech Connect (OSTI)

    Jaskot, A. E.; Oey, M. S.

    2014-08-20

    We suggest that low optical depth in the Lyman continuum (LyC) may relate the Ly? emission, C II and Si II absorption, and C II* and Si II* emission seen in high-redshift galaxies. We base this analysis on Hubble Space Telescope Cosmic Origins Spectrograph spectra of four Green Pea (GP) galaxies, which may be analogs of z > 2 Ly? emitters (LAEs). In the two GPs with the strongest Ly? emission, the Ly? line profiles show reduced signs of resonant scattering. Instead, the Ly? profiles resemble the H? line profiles of evolved star ejecta, suggesting that the Ly? emission originates from a low column density and similar outflow geometry. The weak C II absorption and presence of non-resonant C II* emission in these GPs support this interpretation and imply a low LyC optical depth along the line of sight. In two additional GPs, weak Ly? emission and strong C II absorption suggest a higher optical depth. These two GPs differ in their Ly? profile shapes and C II* emission strengths, however, indicating different inclinations of the outflows to our line of sight. With these four GPs as examples, we explain the observed trends linking Ly?, C II, and C II* in stacked LAE spectra, in the context of optical depth and geometric effects. Specifically, in some galaxies with strong Ly? emission, a low LyC optical depth may allow Ly? to escape with reduced scattering. Furthermore, C II absorption, C II* emission, and Ly? profile shape can reveal the optical depth, constrain the orientation of neutral outflows in LAEs, and identify candidate LyC emitters.

  11. VO.sub.2 precipitates for self-protected optical surfaces

    DOE Patents [OSTI]

    Gea, Laurence A. (Knoxville, TN); Boatner, Lynn A. (Oak Ridge, TN)

    1999-01-01

    A method for forming crystallographically coherent precipitates of vanadium dioxide in the near-surface region of sapphire and the resulting product is disclosed. Ions of vanadium and oxygen are stoichiometrically implanted into a sapphire substrate (Al.sub.2 O.sub.3), and subsequently annealed to form vanadium dioxide precipitates in the substrate. The embedded VO.sub.2 precipitates, which are three-dimensionally oriented with respect to the crystal axes of the Al.sub.2 O.sub.3 host lattice, undergo a first-order monoclinic-to-tetragonal (and also semiconducting-to-metallic) phase transition at .about.77.degree. C. This transformation is accompanied by a significant variation in the optical transmission of the implanted region and results in the formation of an optically active, thermally "switchable" surface region on Al.sub.2 O.sub.3.

  12. VO{sub 2} precipitates for self-protected optical surfaces

    DOE Patents [OSTI]

    Gea, L.A.; Boatner, L.A.

    1999-03-23

    A method for forming crystallographically coherent precipitates of vanadium dioxide in the near-surface region of sapphire and the resulting product is disclosed. Ions of vanadium and oxygen are stoichiometrically implanted into a sapphire substrate (Al{sub 2}O{sub 3}), and subsequently annealed to form vanadium dioxide precipitates in the substrate. The embedded VO{sub 2} precipitates, which are three-dimensionally oriented with respect to the crystal axes of the Al{sub 2}O{sub 3} host lattice, undergo a first-order monoclinic-to-tetragonal (and also semiconducting-to-metallic) phase transition at ca. 77 C. This transformation is accompanied by a significant variation in the optical transmission of the implanted region and results in the formation of an optically active, thermally ``switchable`` surface region on Al{sub 2}O{sub 3}. 5 figs.

  13. Determination of aerosol optical depth using a Micro Total Ozone Spectrometer II (MICROTOPS II) sunphotometer

    E-Print Network [OSTI]

    of Energy, the Office of Educational Program, the National Science Foundation and the Louis Stokes Alliances solar radiation. These effects are quantified by the aerosol optical depth (AOD), which is the exponential decrease in solar radiation, due to the presence of aerosols. We performed the retrievals of AOD

  14. Airborne Sun photometer measurements of aerosol optical depth and columnar water vapor during the Puerto Rico Dust Experiment and

    E-Print Network [OSTI]

    Christopher, Sundar A.

    Airborne Sun photometer measurements of aerosol optical depth and columnar water vapor during to within 0.004­0.030 with coincident data obtained with an AERONET Sun/ sky radiometer located on Cabras Dynamics: Remote sensing; KEYWORDS: PRIDE, airborne Sun photometer, aerosol optical depth, columnar water

  15. Absolute distance perception during in-depth head movement: calibrating optic flow with extra-retinal information

    E-Print Network [OSTI]

    Fah, Cheong Loong

    Absolute distance perception during in-depth head movement: calibrating optic flow with extra-retinal Processing and Application Laboratory (IPAL-CNRS), KDRL, 21 Heng Mui Keng Terrace, Singapore 119613 d reserved. Keywords: Self-motion; Object-motion; Absolute distance perception; Optic flow; Extra-retinal cue

  16. Gravitational microlensing of quasar broad line regions at large optical depths

    E-Print Network [OSTI]

    Geraint F. Lewis; Rodrigo A. Ibata

    2003-10-29

    Recent estimates of the scale of structures at the heart of quasars suggest that the region responsible for the broad line emission are smaller than previously thought. With this revision of scale, the broad line region is amenable to the influence of gravitational microlensing. This study investigates the influence on microlensing at high optical depth on a number of current models of the Broad Line Region (BLR). It is found that the BLR can be significantly magnified by the action of microlensing, although the degree of magnification is dependent upon spatial and kinematic structure of the BLR. Furthermore, while there is a correlation between the microlensing fluctuations of the continuum source and the BLR, there is substantial scatter about this relation, revealing that broadband photometric monitoring is not necessarily a guide to microlensing of the BLR. The results of this study demonstrate that the spatial and kinematic structure within the BLR may be determined via spectroscopic monitoring of microlensed quasars.

  17. Novel Technique for the CO2 Laser Fabrication of Optical Devices with Sub-Micrometer Ablation Depth Precision

    E-Print Network [OSTI]

    a strong wavelength and temperature dependence 5 . In this work a 100 W, pulse width modulated (PWM), CO2Novel Technique for the CO2 Laser Fabrication of Optical Devices with Sub-Micrometer Ablation Depth techniques for the processing of fibre end face and cladding surfaces using a 9.6 µm CO2 laser. We

  18. RETRIEVALS OF CLOUD OPTICAL DEPTH AND EFFECTIVE RADIUS FROM A THIN-CLOUD ROTATING SHADOWBAND RADIOMETER (TC-RSR)

    E-Print Network [OSTI]

    RETRIEVALS OF CLOUD OPTICAL DEPTH AND EFFECTIVE RADIUS FROM A THIN-CLOUD ROTATING SHADOWBAND Division Brookhaven National Laboratory U.S. Department of Energy Office of Science ABSTRACT A thin cloud cloud. We applied Min and Duan's retrieval algorithm to the field measurements of TC-RSR to derive cloud

  19. Optical and thermal depth profile reconstructions of inhomogeneous photopolymerization in dental resins using photothermal waves

    E-Print Network [OSTI]

    Mandelis, Andreas

    by a blue light-emitting diode, the x and x depth profiles were reconstructed from photothermal radiometric

  20. Quantifying Aerosol Direct Effects from Broadband Irradiance and Spectral Aerosol Optical Depth Observations

    SciTech Connect (OSTI)

    Creekmore, Torreon N.; Joseph, Everette; Long, Charles N.; Li, Siwei

    2014-05-16

    We outline a methodology using broadband and spectral irradiances to quantify aerosol direct effects on the surface diffuse shortwave (SW) irradiance. Best Estimate Flux data span a 13 year timeframe at the Department of Energy Atmospheric Radiation Measurement Program’s Southern Great Plains (SGP) site. Screened clear-sky irradiances and aerosol optical depth (AOD), for solar zenith angles ? 65°, are used to estimate clear-sky diffuse irradiances. We validate against detected clear-sky observations from SGP’s Basic Radiation System (BRS). BRS diffuse irradiances were in accordance with estimates, producing a root-mean-square error and mean bias errors of 4.0 W/m2 and -1.4 W/m2, respectively. Absolute differences show 99% of estimates within ±10 W/m2 (10%) of the mean BRS observations. Clear-sky diffuse estimates are used to derive quantitative estimates of aerosol radiative effects, represented as the aerosol diffuse irradiance (ADI). ADI is the contribution of diffuse SW to global SW, attributable to scattering of atmospheric transmission by natural plus anthropogenic aerosols. Estimated slope for the ADI as a function of AOD indicates an increase of ~22 W/m2 in diffuse SW for every 0.1 increase in AOD. Such significant increases in the diffuse fraction could possibly increase photosynthesis. Annual mean ADI is 28.2 W/m2, and heavy aerosol loading at SGP provides up to a maximum increase of 120 W/m2 in diffuse SW over background conditions. With regard to seasonal variation, the mean diffuse forcings are 17.2, 33.3, 39.0, and 23.6 W/m2 for winter, spring, summer, and fall, respectively.

  1. The optical depth of the Universe to ultrahigh energy cosmic ray scattering in the magnetized large scale structure

    E-Print Network [OSTI]

    Kumiko Kotera; Martin Lemoine

    2008-04-30

    This paper provides an analytical description of the transport of ultrahigh energy cosmic rays in an inhomogeneously magnetized intergalactic medium. This latter is modeled as a collection of magnetized scattering centers such as radio cocoons, magnetized galactic winds, clusters or magnetized filaments of large scale structure, with negligible magnetic fields in between. Magnetic deflection is no longer a continuous process, it is rather dominated by scattering events. We study the interaction between high energy cosmic rays and the scattering agents. We then compute the optical depth of the Universe to cosmic ray scattering and discuss the phenomological consequences for various source scenarios. For typical parameters of the scattering centers, the optical depth is greater than unity at 5x10^{19}eV, but the total angular deflection is smaller than unity. One important consequence of this scenario is the possibility that the last scattering center encountered by a cosmic ray be mistaken with the source of this cosmic ray. In particular, we suggest that part of the correlation recently reported by the Pierre Auger Observatory may be affected by such delusion: this experiment may be observing in part the last scattering surface of ultrahigh energy cosmic rays rather than their source population. Since the optical depth falls rapidly with increasing energy, one should probe the arrival directions of the highest energy events beyond 10^{20}eV on an event by event basis to circumvent this effect.

  2. Near-infrared fluorescence enhanced optical imaging: an analysis of penetration depth 

    E-Print Network [OSTI]

    Houston, Jessica Perea

    2002-01-01

    , but also may facilitate cancer staging and increase our understanding of tumor progression. Frequency domain photon migration imaging (FDPM) is a maturing optical tool that is based upon the propagation of near infrared (NIR) radiation through tissue...

  3. On the Depth Information in the Point Spread Function of a Defocused Optical System

    E-Print Network [OSTI]

    Subbarao, Murali "Rao"

    is determined by paraxial geometric op­ tics. In this paper we show that oe 2 w = oe 2 g + oe 2 0 . Consequently by paraxial geometric optics. We also compare here the PSF determined by paraxial geometric op­ tics

  4. Relative humidity and its effect on aerosol optical depth in the vicinity of convective clouds

    E-Print Network [OSTI]

    Altaratz, O

    The hygroscopic growth of aerosols is controlled by the relative humidity (RH) and changes the aerosols' physical and hence optical properties. Observational studies of aerosol–cloud interactions evaluate the aerosol ...

  5. Electromagnetically induced transparency and four-wave mixing in a cold atomic ensemble with large optical depth

    E-Print Network [OSTI]

    J. Geng; G. T. Campbell; J. Bernu; D. Higginbottom; B. M. Sparkes; S. M. Assad; W. P. Zhang; N. P. Robins; P. K. Lam; B. C. Buchler

    2014-08-11

    We report on the delay of optical pulses using electromagnetically induced transparency in an ensemble of cold atoms with an optical depth exceeding 500. To identify the regimes in which four-wave mixing impacts on EIT behaviour, we conduct the experiment in both rubidium 85 and rubidium 87. Comparison with theory shows excellent agreement in both isotopes. In rubidium 87, negligible four-wave mixing was observed and we obtained one pulse-width of delay with 50% efficiency. In rubidium 85, four-wave-mixing contributes to the output. In this regime we achieve a delay-bandwidth product of 3.7 at 50% efficiency, allowing temporally multimode delay, which we demonstrate by compressing two pulses into the memory medium.

  6. In-depth analysis of CIGS film for solar cells, structural and optical characterization

    E-Print Network [OSTI]

    Slobodskyy, A; ~Ulyanenkova, T; ~Doyle, S; Powalla, M; ~Baumbach, T; ~Lemmer, U

    2010-01-01

    Space-resolved X-ray diffraction measurements performed on gradient-etched CuIn$_{1-x}$Ga$_x$Se$_2$ (CIGS) solar cells provide information about stress and texture depth profiles in the absorber layer. An important parameter for CIGS layer growth dynamics, the absorber thickness-dependent stress in the molybdenum back contact is analyzed. Texturing of grains and quality of the polycrystalline absorber layer are correlated with the intentional composition gradients (band gap grading). Band gap gradient is determined by space-resolved photoluminescence measurements and correlated with composition and strain profiles.

  7. Computing and Partitioning Cloud Feedbacks Using Cloud Property Histograms. Part II: Attribution to Changes in Cloud Amount, Altitude, and Optical Depth

    E-Print Network [OSTI]

    Hartmann, Dennis

    Computing and Partitioning Cloud Feedbacks Using Cloud Property Histograms. Part II: Attribution to Changes in Cloud Amount, Altitude, and Optical Depth MARK D. ZELINKA Department of Atmospheric Sciences received 12 May 2011, in final form 15 November 2011) ABSTRACT Cloud radiative kernels and histograms

  8. Niamey Aerosol Optical Depths

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

    Flynn, Connor

    2008-10-01

    MFRSR irradiance data collected during the ACRF AMF deployment in Niamey, Niger have been used to derive AOD for five wavelength channels of the MFRSR. These data have been corrected to adjust for filter drift over the course of the campaign and contamination due to forward scattering as a result of large dust particles in the atmosphere around Niamey.

  9. Depth-resolved monitoring of diffusion of hyperosmotic agents in normal and malignant human esophagus tissues using optical coherence tomography in-vitro

    SciTech Connect (OSTI)

    Zhao Qingliang; Guo Zhouyi; Wei Huajiang; Yang Hongqin; Xie Shusen

    2011-10-31

    Depth-resolved monitoring with differentiation and quantification of glucose diffusion in healthy and abnormal esophagus tissues has been studied in vitro. Experiments have been performed using human normal esophagus and esophageal squamous cell carcinoma (ESCC) tissues by the optical coherence tomography (OCT). The images have been continuously acquired for 120 min in the experiments, and the depth-resolved and average permeability coefficients of the 40 % glucose solution have been calculated by the OCT amplitude (OCTA) method. We demonstrate the capability of the OCT technique for depth-resolved monitoring, differentiation, and quantifying of glucose diffusion in normal esophagus and ESCC tissues. It is found that the permeability coefficients of the 40 % glucose solution are not uniform throughout the normal esophagus and ESCC tissues and increase from (3.30 {+-} 0.09) Multiplication-Sign 10{sup -6} and (1.57 {+-} 0.05) Multiplication-Sign 10{sup -5} cm s{sup -1} at the mucous membrane of normal esophagus and ESCC tissues to (1.82 {+-} 0.04) Multiplication-Sign 10{sup -5} and (3.53 {+-} 0.09) Multiplication-Sign 10{sup -5} cm s{sup -1} at the submucous layer approximately 742 {mu}m away from the epithelial surface of normal esophagus and ESCC tissues, respectively. (optical coherence tomography)

  10. Atmospheric optical calibration system

    DOE Patents [OSTI]

    Hulstrom, Roland L. (Bloomfield, CO); Cannon, Theodore W. (Golden, CO)

    1988-01-01

    An atmospheric optical calibration system is provided to compare actual atmospheric optical conditions to standard atmospheric optical conditions on the basis of aerosol optical depth, relative air mass, and diffuse horizontal skylight to global horizontal photon flux ratio. An indicator can show the extent to which the actual conditions vary from standard conditions. Aerosol scattering and absorption properties, diffuse horizontal skylight to global horizontal photon flux ratio, and precipitable water vapor determined on a real-time basis for optical and pressure measurements are also used to generate a computer spectral model and for correcting actual performance response of a photovoltaic device to standard atmospheric optical condition response on a real-time basis as the device is being tested in actual outdoor conditions.

  11. Atmospheric optical calibration system

    DOE Patents [OSTI]

    Hulstrom, R.L.; Cannon, T.W.

    1988-10-25

    An atmospheric optical calibration system is provided to compare actual atmospheric optical conditions to standard atmospheric optical conditions on the basis of aerosol optical depth, relative air mass, and diffuse horizontal skylight to global horizontal photon flux ratio. An indicator can show the extent to which the actual conditions vary from standard conditions. Aerosol scattering and absorption properties, diffuse horizontal skylight to global horizontal photon flux ratio, and precipitable water vapor determined on a real-time basis for optical and pressure measurements are also used to generate a computer spectral model and for correcting actual performance response of a photovoltaic device to standard atmospheric optical condition response on a real-time basis as the device is being tested in actual outdoor conditions. 7 figs.

  12. How do A-train Sensors Intercompare in the Retrieval of Above-Cloud Aerosol Optical Depth? A Case Study-based Assessment

    SciTech Connect (OSTI)

    Jethva, H. T.; Torres, O.; Waquet, F.; Chand, Duli; Hu, Yong X.

    2014-01-16

    We inter-compare the above-cloud aerosol optical depth (ACAOD) of biomass burning plumes retrieved from different A-train sensors, i.e., MODIS, CALIOP, POLDER, and OMI. These sensors have shown independent capabilities to detect and retrieve aerosol loading above marine boundary layer clouds--a kind of situation often found over the Southeast Atlantic Ocean during dry burning season. A systematic one-to-one comparison reveals that, in general, all passive sensors and CALIOP-based research methods derive comparable ACAOD with differences mostly within 0.2 over homogeneous cloud fields. The 532-nm ACAOD retrieved by CALIOP operational algorithm is largely underestimated; however, it’s 1064-nm AOD when converted to 500 nm shows closer agreement to the passive sensors. Given the different types of sensor measurements processed with different algorithms, the close agreement between them is encouraging. Due to lack of adequate direct measurements above cloud, the validation of satellite-based ACAOD retrievals remains an open challenge. The inter-satellite comparison, however, can be useful for the relative evaluation and consistency check.

  13. ARM - Measurement - Aerosol optical depth

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Comments?govInstrumentsnoaacrnBarrow, Alaska Outreach Home Room NewsgovMeasurementsAdvectiveeffective

  14. ARM - Measurement - Cloud optical depth

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Comments?govInstrumentsnoaacrnBarrow, Alaska Outreach Home Roomparticle sizefraction ARM Data Discoveryoptical

  15. Multi-frequency optical-depth maps and the case for free-free absorption in two compact symmetric radio sources: The CSO candidate J1324 + 4048 and the CSO J0029 + 3457

    SciTech Connect (OSTI)

    Marr, J. M.; Read, J.; Morris, A. O.; Perry, T. M.; Taylor, G. B.

    2014-01-10

    We obtained dual-polarization very long baseline interferometry observations at six frequencies of the compact symmetric object J0029 + 3457 and the compact symmetric object candidate J1324 + 4048. By comparing the three lower-frequency maps with extrapolations of the high-frequency maps, we produced maps of the optical depth as a function of frequency. The morphology of the optical-depth maps of J1324 + 4048 is strikingly smooth, suggestive of a foreground screen of absorbing gas. The spectra at the intensity peaks fit a simple free-free absorption (FFA) model, with ?{sub ?}{sup 2}?2, better than a simple synchrotron self-absorption model, in which ?{sub ?}{sup 2}?3.5--5.5. We conclude that the case for FFA in J1324 + 4048 is strong. The optical-depth maps of J0029 + 3457 exhibit structure, but the morphology does not correlate with that in the intensity maps. The fit of the spectra at the peaks to a simple FFA model yields ?{sub ?}{sup 2}?1, but because the turnover is gradual, the fit is relatively insensitive to the input parameters. We find that FFA by a thin amount of gas in J0029 + 3457 is likely but not definitive. One compact feature in J0029 + 3457 has an inverted spectrum even at the highest frequencies. We infer this to be the location of the core and estimate an upper limit to the magnetic field of order 3 Gauss at a radius of order 1 pc. In comparison with maps from observations at earlier epochs, no apparent growth in either J1324 + 4048 or J0029 + 3457 is apparent, with upper limits of 0.03 and 0.02 mas yr{sup –1}, corresponding to maximum linear separation speeds of 0.6c and 0.4c.

  16. PRECIPITATION DOWNSCALING: METHODOLOGIES AND

    E-Print Network [OSTI]

    Foufoula-Georgiou, Efi

    PRECIPITATION DOWNSCALING: METHODOLOGIES AND HYDROLOGIC APPLICATIONS Efi Foufoula-Georgiou St/or other information. #12;PREMISES OF STATISTICAL DOWNSCALING Precipitation exhibits space-time variability) There is a substantial evidence to suggest that despite the very complex patterns of precipitation

  17. Geometrical Characterization of Precipitation Patterns

    E-Print Network [OSTI]

    AghaKouchak, Amir; Nasrollahi, Nasrin; Li, Jingjing; Imam, Bisher; Sorooshian, Soroosh

    2011-01-01

    ing quantitative precipitation forecast. J. Geophys. Res. ,in satellite-based precipitation estimates. J. Geophys.Application to multi-sensor precipitation estimates. Hydrol.

  18. ORIENTATION RELATIONSHIPS IN PRECIPITATION SYSTEMS

    E-Print Network [OSTI]

    Dahmen, U.

    2013-01-01

    ORIENTATION RELATIONSHIPS IN PRECIPITATION SYSTEMS U. DahmenOrientation Relationships in Precipitation Systems U. Dahmenorientation relationships in precipitation systems b~c/hcp a

  19. Incorporating Precipitation-Induced Variation in Annual Forage Production Into Economic Analyses of Range Improvement Practices. 

    E-Print Network [OSTI]

    Hamilton, W.T.; Conner, J.R.; Stuth, J.W.; McBryde, G.L.; Vega, A.J

    1986-01-01

    This thesis described a morphing-based precipitation verification strategy inspired by Keil and Craig. This strategy is based on an optical flow algorithm to morph the image (field) of the forecast precipitation into an ...

  20. PRECIPITATION AND TEMPERATURE CHANGES AND THEIR EFFECT ON GROUNDWATER ALONG THE KONA COAST OF HAWAII

    E-Print Network [OSTI]

    Anderson, Charles W.

    THESIS PRECIPITATION AND TEMPERATURE CHANGES AND THEIR EFFECT ON GROUNDWATER ALONG THE KONA COAST;Copyright by Sharla Ann Stevenson 2015 All Rights Reserved #12;ii ABSTRACT PRECIPITATION AND TEMPERATURE-depth analysis of changes in precipitation and temperature occurring during the time since the park

  1. Classi cation Precipitation

    E-Print Network [OSTI]

    Langford, John

    on future inputs #12; rain snow 0 0.2 0.4 0.6 0.8 1 Precipitation Temperature Unknown Function Samples Training Sample #12; rain snow 0 0.2 0.4 0.6 0.8 1 1.2 1.4 Precipitation Temperature Learned Function (Classifier) guess 1 guess 2 guess 3 #12; rain snow 0 0.2 0.4 0.6 0.8 1 Precipitation Temperature Future

  2. PRACTICAL SNOW DEPTH SAMPLING AROUND SIX SNOW TELEMETRY (SNOTEL) STATIONS IN COLORADO AND WYOMING, UNITED STATES

    E-Print Network [OSTI]

    Anderson, Charles W.

    THESIS PRACTICAL SNOW DEPTH SAMPLING AROUND SIX SNOW TELEMETRY (SNOTEL) STATIONS IN COLORADO Laituri Mazdak Arabi #12;ii ABSTRACT PRACTICAL SNOW DEPTH SAMPLING AROUND SIX SNOW TELEMETRY (SNOTEL. These stations measure snow depth (SD), snow water equivalent (SWE), air temperature and precipitation. To assess

  3. Africa Aerosol Optical Depth Obtained From MISR

    E-Print Network [OSTI]

    Frank, Thomas D.

    Faso Cameroon Equatorial Guinea Gambia, The Ghana Guinea Guinea-Bissau Ivory Coast Liberia Mali Cameroon Equatorial Guinea Gambia, The Ghana Guinea Guinea-Bissau Ivory Coast Liberia Mali Mauritania

  4. ARM - PI Product - Niamey Aerosol Optical Depths

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Comments?govInstrumentsnoaacrnBarrow, Alaska OutreachCalendar NSAProductsMerged and corrected 915

  5. Computation of Texture and Stereoscopic Depth in Humans

    E-Print Network [OSTI]

    Fahle, Manfred

    1989-10-01

    The computation of texture and of stereoscopic depth is limited by a number of factors in the design of the optical front-end and subsequent processing stages in humans and machines. A number of limiting factors in ...

  6. Precipitation HMM Recalls on BNT

    E-Print Network [OSTI]

    Nuel, Gregory

    Precipitation HMM Recalls on BNT Results Exact Belief Propagation in Bayesian Networks: from to Algorithms #12;Precipitation HMM Recalls on BNT Results Outline 1 Precipitation HMM Definition Marginal to Algorithms #12;Precipitation HMM Recalls on BNT Results Definition Marginal Distributions Recursions

  7. Global energy and global precipitation

    E-Print Network [OSTI]

    1 Global energy and global precipitation or Why doesn't precipitation increase as Clausias expect precipitation to increase at the same rate. · Rest of this brief talk is to show you why Heat Flux (S) 20 W/m2 Atmospheric heating from precipitation LP Atmosphere has small heat capacity. So

  8. Variable depth core sampler

    DOE Patents [OSTI]

    Bourgeois, P.M.; Reger, R.J.

    1996-02-20

    A variable depth core sampler apparatus is described comprising a first circular hole saw member, having longitudinal sections that collapses to form a point and capture a sample, and a second circular hole saw member residing inside said first hole saw member to support the longitudinal sections of said first hole saw member and prevent them from collapsing to form a point. The second hole saw member may be raised and lowered inside said first hole saw member. 7 figs.

  9. Variable depth core sampler

    DOE Patents [OSTI]

    Bourgeois, Peter M. (Hamburg, NY); Reger, Robert J. (Grand Island, NY)

    1996-01-01

    A variable depth core sampler apparatus comprising a first circular hole saw member, having longitudinal sections that collapses to form a point and capture a sample, and a second circular hole saw member residing inside said first hole saw member to support the longitudinal sections of said first hole saw member and prevent them from collapsing to form a point. The second hole saw member may be raised and lowered inside said first hole saw member.

  10. Precipitation scavenging, dry deposition, and resuspension. Volume 1: precipitation scavenging

    SciTech Connect (OSTI)

    Pruppacher, H.R.; Semonin, R.G.; Slinn, W.G.N.

    1983-01-01

    Papers are presented under the headings: cloud studies, precipitation chemistry, plume studies, gas scavenging, microphysics and models.

  11. Precipitation hardening austenitic superalloys

    DOE Patents [OSTI]

    Korenko, Michael K. (Wexford, PA)

    1985-01-01

    Precipitation hardening, austenitic type superalloys are described. These alloys contain 0.5 to 1.5 weight percent silicon in combination with about 0.05 to 0.5 weight percent of a post irradiation ductility enhancing agent selected from the group of hafnium, yttrium, lanthanum and scandium, alone or in combination with each other. In addition, when hafnium or yttrium are selected, reductions in irradiation induced swelling have been noted.

  12. Critical phenomena in atmospheric precipitation

    E-Print Network [OSTI]

    Loss, Daniel

    LETTERS Critical phenomena in atmospheric precipitation OLE PETERS1,2,3 * AND J. DAVID NEELIN3 1 convection and precipitation (the order parameter)--with correlated regions on scales of tens to hundreds the climatological mean by an order of magnitude or more. Moist convection and the accompanying precipitation have

  13. PRECIPITATION AT ARMAGH OBSERVATORY 18381997

    E-Print Network [OSTI]

    PRECIPITATION AT ARMAGH OBSERVATORY 1838­1997 C.J. Butler, A.D.S. Coughlin and D.T. Fee ABSTRACT the longest in the British Isles. Here we present the monthly mean daily precipitation recorded at Armagh with the compilation and calibration of one such body of data, namely the precipitation recorded at Armagh Observatory

  14. Modeling microbially induced calcite precipitation

    E-Print Network [OSTI]

    Cirpka, Olaf Arie

    Modeling microbially induced calcite precipitation Erlangen, November 27th 2014 Johannes Hommel and storage uses require separation. sealing of leakage pathways is important sealing = mineral precipitation Induced Calcite Precipitation (MICP) is investigated as sealing technology. It is used as an exemplary

  15. IN-DEPTH REPORT: Environmental

    E-Print Network [OSTI]

    in local policy debates about fracking. This In-depth Report from Science for Environment Policy explores

  16. ARM - Word Seek: Precipitation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News Publications Traditional Knowledge Kiosks Barrow, Alaska Tropical WesternWillPrecipitation

  17. ARM - Measurement - Precipitation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Comments?govInstrumentsnoaacrnBarrow, Alaska Outreach Home RoomparticlecontentnumbergovMeasurementsPrecipitation

  18. Precipitation extremes under climate change

    E-Print Network [OSTI]

    O'Gorman, Paul A

    2015-01-01

    The response of precipitation extremes to climate change is considered using results from theory, modeling, and observations, with a focus on the physical factors that control the response. Observations and simulations with climate models show that precipitation extremes intensify in response to a warming climate. However, the sensitivity of precipitation extremes to warming remains uncertain when convection is important, and it may be higher in the tropics than the extratropics. Several physical contributions govern the response of precipitation extremes. The thermodynamic contribution is robust and well understood, but theoretical understanding of the microphysical and dynamical contributions is still being developed. Orographic precipitation extremes and snowfall extremes respond differently from other precipitation extremes and require particular attention. Outstanding research challenges include the influence of mesoscale convective organization, the dependence on the duration considered, and the need to...

  19. Complex motion of precipitation bands

    E-Print Network [OSTI]

    Lagzi, I; Rácz, Z; Lagzi, Istvan; Papai, Peter; Racz, Zoltan

    2006-01-01

    Formation and dynamics of an Al(OH)_3 precipitation ring is studied by diffusing NaOH into a gel containing AlCl_3. Limited feeding of the outer electrolyte (NaOH) is found to yield an intricate ring-dynamics which involves stopping and reversal of the direction of motion of the precipitation ring, and evolution into stationary multi-ring structures. A model of the ring-dynamics is developed by combining a phase separation scenario for the precipitation with the redissolution (complex formation) of the precipitate in the excess of the outer electrolyte.

  20. PRE-PRECIPITATION PHENOMENA AT GRAIN BOUNDARIES

    E-Print Network [OSTI]

    Briceno-Valero, J.

    2010-01-01

    13820 DE82 0 1 2 7 9 4 PRE-PRECIPITATION PHENOMENA AT GRAINof any evidence suggesting precipitation has occurred. Theand grain boundary precipitation have shown (1) that there

  1. REGULAR ARTICLE Warming and increased precipitation frequency

    E-Print Network [OSTI]

    Neher, Deborah A.

    REGULAR ARTICLE Warming and increased precipitation frequency on the Colorado Plateau: implications in temperature and precipitation are expected to influence ecosystem processes worldwide. Despite their globally how increased temperature and frequency of summertime precipitation affect the contributions of crust

  2. PRECIPITATION-STRENGTHENED AUSTENITIC FE-MN-TI ALLOYS

    E-Print Network [OSTI]

    Chiang, K.-M.

    2010-01-01

    combined with the high PRECIPITATION-STRENGTHENED AUSTENITICMORPHOLOGY OF LAVES PHASE PRECIPITATION", •••. PRECIPITATECOLD WORK ON PRECIPITATION"",. , •• " , . , . " " , . , L~

  3. The MINIS Balloon Campaign: Duskside Relativistic Electron Precipitation

    E-Print Network [OSTI]

    Sample, John Glen

    2013-01-01

    Energetic electron precipitation during substorm injectionenergetic electron precipitation fluxes into the atmosphere,modeling of microburst precipitation Geophys Res. Lett. ,

  4. The role of precipitation size distributions in km-scale NWP simulations of intense precipitation: Evaluation of cloud properties and surface precipitation

    SciTech Connect (OSTI)

    Van Weverberg K.; Vogelmann A.; van Lipzig, N. P. M.; Delobbec, L.

    2012-04-01

    We investigate the sensitivity of simulated cloud properties and surface precipitation to assumptions regarding the size distributions of the precipitating hydrometeors in a one-moment bulk microphysics scheme. Three sensitivity experiments were applied to two composites of 15 convective and 15 frontal stratiform intense precipitation events observed in a coastal midlatitude region (Belgium), which were evaluated against satellite-retrieved cloud properties and radar-rain-gauge derived surface precipitation. It is found that the cloud optical thickness distribution was well captured by all experiments, although a significant underestimation of cloudiness occurred in the convective composite. The cloud-top-pressure distribution was improved most by more realistic snow size distributions (including a temperature-dependent intercept parameter and non-spherical snow for the calculation of the slope parameter), due to increased snow depositional growth at high altitudes. Surface precipitation was far less sensitive to whether graupel or hail was chosen as the rimed ice species, as compared to previous idealized experiments. This smaller difference in sensitivity could be explained by the stronger updraught velocities and higher freezing levels in the idealized experiments compared to typical coastal midlatitude environmental conditions.

  5. Localized precipitation and runoff on Mars

    E-Print Network [OSTI]

    Kite, Edwin S; Rafkin, Scot; Manga, Michael; Dietrich, William E

    2010-01-01

    We use the Mars Regional Atmospheric Modeling System (MRAMS) to simulate lake storms on Mars, finding that intense localized precipitation will occur for lake size >=10^3 km^2. Mars has a low-density atmosphere, so deep convection can be triggered by small amounts of latent heat release. In our reference simulation, the buoyant plume lifts vapor above condensation level, forming a 20km-high optically-thick cloud. Ice grains grow to 200 microns radius and fall near (or in) the lake at mean rates up to 1.5 mm/hr water equivalent (maximum rates up to 6 mm/hr water equivalent). Because atmospheric temperatures outside the surface layer are always well below 273K, supersaturation and condensation begin at low altitudes above lakes on Mars. In contrast to Earth lake-effect storms, lake storms on Mars involve continuous precipitation, and their vertical velocities and plume heights exceed those of tropical thunderstorms on Earth. Convection does not reach above the planetary boundary layer for lakes O(10^2) mbar. In...

  6. Daily Precipitation Grids for South America

    E-Print Network [OSTI]

    Robeson, Scott M.

    W Daily Precipitation Grids for South America --SCOTT M. ROBESON AND LESLIE A. ENSOR Indiana precipitation databases, such as that of Liebmann and Allured (2005, hereafter LA2005). Precipitation this important region has received limited attention with regard to precipitation data- bases (Cook et al. 2003

  7. Resolution of prestack depth migration Ludek Klimes

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Resolution of prestack depth migration Ludek Klimes Department of Geophysics, Faculty inversion, seismic anisotropy. 1. Introduction A general formulation of prestack depth migration based numerical methods (Claerbout, 1971) is considered in this paper. A common­shot prestack depth migration

  8. Rotating drum variable depth sampler

    DOE Patents [OSTI]

    Nance, Thomas A. (Aiken, SC); Steeper, Timothy J. (Trenton, SC)

    2008-07-01

    A sampling device for collecting depth-specific samples in silt, sludge and granular media has three chambers separated by a pair of iris valves. Rotation of the middle chamber closes the valves and isolates a sample in a middle chamber.

  9. Practical Analysis of materials with depth varying compositions using FT-IR photoacoustic spectroscopy (PAS)

    SciTech Connect (OSTI)

    J.F. McClelland; R.W. Jones; Siquan Luo

    2004-09-30

    FT-IR photoacoustic spectroscopy (PAS) is discussed as a nondestructive method to probe the molecular composition of materials versus depth on the basis of the analysis of layers of experimentally controllable thickness, which are measured from the sample surface to depths of some tens of micrometers, depending on optical and thermal properties. Computational methods are described to process photoacoustic amplitude and phase spectra for both semi-quantitative and quantitative depth analyses. These methods are demonstrated on layered and gradient samples.

  10. Portable liquid collection electrostatic precipitator

    DOE Patents [OSTI]

    Carlson, Duane C.; DeGange, John J.; Halverson, Justin E.

    2005-10-18

    A portable liquid collection electrostatic collection precipitator for analyzing air is provided which is a relatively small, self-contained device. The device has a tubular collection electrode, a reservoir for a liquid, and a pump. The pump pumps the liquid into the collection electrode such that the liquid flows down the exterior of the collection electrode and is recirculated to the reservoir. An air intake is provided such that air to be analyzed flows through an ionization section to ionize analytes in the air, and then flows near the collection electrode where ionized analytes are collected. A portable power source is connected to the air intake and the collection electrode. Ionizable constituents in the air are ionized, attracted to the collection electrode, and precipitated in the liquid. The precipitator may also have an analyzer for the liquid and may have a transceiver allowing remote operation and data collection.

  11. Timber Mountain Precipitation Monitoring Station

    SciTech Connect (OSTI)

    Lyles, Brad; McCurdy, Greg; Chapman, Jenny; Miller, Julianne

    2012-01-01

    A precipitation monitoring station was placed on the west flank of Timber Mountain during the year 2010. It is located in an isolated highland area near the western border of the Nevada National Security Site (NNSS), south of Pahute Mesa. The cost of the equipment, permitting, and installation was provided by the Environmental Monitoring Systems Initiative (EMSI) project. Data collection, analysis, and maintenance of the station during fiscal year 2011 was funded by the U.S. Department of Energy, National Nuclear Security Administration, Nevada Site Office Environmental Restoration, Soils Activity. The station is located near the western headwaters of Forty Mile Wash on the Nevada Test and Training Range (NTTR). Overland flows from precipitation events that occur in the Timber Mountain high elevation area cross several of the contaminated Soils project CAU (Corrective Action Unit) sites located in the Forty Mile Wash watershed. Rain-on-snow events in the early winter and spring around Timber Mountain have contributed to several significant flow events in Forty Mile Wash. The data from the new precipitation gauge at Timber Mountain will provide important information for determining runoff response to precipitation events in this area of the NNSS. Timber Mountain is also a groundwater recharge area, and estimation of recharge from precipitation was important for the EMSI project in determining groundwater flowpaths and designing effective groundwater monitoring for Yucca Mountain. Recharge estimation additionally provides benefit to the Underground Test Area Sub-project analysis of groundwater flow direction and velocity from nuclear test areas on Pahute Mesa. Additionally, this site provides data that has been used during wild fire events and provided a singular monitoring location of the extreme precipitation events during December 2010 (see data section for more details). This letter report provides a summary of the site location, equipment, and data collected in fiscal year 2011.

  12. APPENDIX III III.1 Precipitation Daily Totals Preceding Precipitation Events-----------------------------------------III-2

    E-Print Network [OSTI]

    Julien, Pierre Y.

    APPENDIX III III.1 Precipitation Daily Totals Preceding Precipitation Events-----------------------------------------III-2 Figure III.1.1 Precipitation daily totals preceding the a) calibration and b) and c) validationPRECIPITATION DAILY TOTALS PRECEDING PRECIPITATION EVENTS 0 0.5 1 1.5 2 2.5 3 9/19/819/21/819/23/819/25/819/27

  13. Precipitation scavenging, dry deposition, and resuspension. Volume 1. Precipitation scavenging

    SciTech Connect (OSTI)

    Pruppacher, H.R.; Semonin, R.G.; Slinn, W.G.N. (eds.)

    1983-01-01

    These two volumes contain papers prepared for and presented at the Fourth International Conference on Precipitation Scavenging, Dry Deposition, and Resuspension (the Chamberlain Meeting) held during 29 November to 3 December, 1982 in Santa Monica, California. Papers presented are abstracted separately.

  14. Ultrasonic material hardness depth measurement

    DOE Patents [OSTI]

    Good, Morris S. (Richland, WA); Schuster, George J. (Kennewick, WA); Skorpik, James R. (Kennewick, WA)

    1997-01-01

    The invention is an ultrasonic surface hardness depth measurement apparatus and method permitting rapid determination of hardness depth of shafts, rods, tubes and other cylindrical parts. The apparatus of the invention has a part handler, sensor, ultrasonic electronics component, computer, computer instruction sets, and may include a display screen. The part handler has a vessel filled with a couplant, and a part rotator for rotating a cylindrical metal part with respect to the sensor. The part handler further has a surface follower upon which the sensor is mounted, thereby maintaining a constant distance between the sensor and the exterior surface of the cylindrical metal part. The sensor is mounted so that a front surface of the sensor is within the vessel with couplant between the front surface of the sensor and the part.

  15. Ultrasonic material hardness depth measurement

    DOE Patents [OSTI]

    Good, M.S.; Schuster, G.J.; Skorpik, J.R.

    1997-07-08

    The invention is an ultrasonic surface hardness depth measurement apparatus and method permitting rapid determination of hardness depth of shafts, rods, tubes and other cylindrical parts. The apparatus of the invention has a part handler, sensor, ultrasonic electronics component, computer, computer instruction sets, and may include a display screen. The part handler has a vessel filled with a couplant, and a part rotator for rotating a cylindrical metal part with respect to the sensor. The part handler further has a surface follower upon which the sensor is mounted, thereby maintaining a constant distance between the sensor and the exterior surface of the cylindrical metal part. The sensor is mounted so that a front surface of the sensor is within the vessel with couplant between the front surface of the sensor and the part. 12 figs.

  16. A STUDY OF PRECIPITATION IN INTERSTITIAL ALLOYS. I. PRECIPITATION SEQUENCE IN Ta-C ALLOYS

    E-Print Network [OSTI]

    Dahmen, U.

    2010-01-01

    Acta Meta11urgica A STUDY OF PRECIPITATION IN INTERSTITIALALLOYS. I. PRECIPITATION SEQUENCE IN Ta-C ALLOYS U. Dahmen,ENG-48 y A Study of Precipitation in Interstitial Alloys. I.

  17. Performance of Evapotranspirative Covers Under Enhanced Precipitation: Preliminary Data

    SciTech Connect (OSTI)

    David C. Anderson, Lloyd T. Desotell, David B. Hudson, Gregory J. Shott, Vefa Yucel

    2007-02-01

    Since January 2001, drainage lysimeter studies have been conducted at Yucca Flat, on the Nevada Test Site, in support of an evapotranspirative cover design. Yucca Flat has an arid climate with average precipitation of 16.5 cm annually. The facility consists of six drainage lysimeters 3 m in diameter, 2.4 m deep, and backfilled with a single layer of native soil. The bottom of each lysimeter is sealed and equipped with a small drain that enables direct measurement of saturated drainage. Each lysimeter has eight time-domain reflectometer probes to measure moisture content-depth profiles paired with eight heat-dissipation probes to measure soil-water potential depth profiles. Sensors are connected to dataloggers which are remotely accessed via a phone line. The six lysimeters have three different surface treatments: two are bare-soil; two were revegetated with native species (primarily shadscale, winterfat, ephedra, and Indian rice grass); and two were allowed to revegetate naturally with such species as Russian thistle, halogeton, tumblemustard and cheatgrass. Beginning in October 2003, one half of the paired cover treatments (one bare soil, one invader species, and one native species) were irrigated with an amount of water equal to two times the natural precipitation to achieve a three times natural precipitation treatment. From October 2003 through December 2005, all lysimeters received 52.8 cm precipitation, and the four irrigated lysimeters received an extra 105.6 cm of irrigation. No drainage has occurred from any of the nonirrigated lysimeters, but moisture has accumulated at the bottom of the bare-soil lysimeter and the native-plant lysimeter. All irrigated lysimeters had some drainage. The irrigated baresoil lysimeter had 48.3 cm of drainage or 26.4 percent of the combined precipitation and applied irrigation for the entire monitoring record. The irrigated invader species lysimeter had 5.8 cm of drainage, about 3.2 percent of the combined precipitation and applied irrigation. An irrigation valve failure caused an additional 50.8 cm of irrigation to be applied to the irrigated native plant lysimeter. There has been 29.3 cm of drainage from this lysimeter, which is 11.5 percent of the total applied water. Approximately 40 percent of the drainage from the irrigated native plant lysimeter occurred within four weeks of the valve failure.

  18. Swept source optical coherence microscopy for pathological assessment of cancerous tissues

    E-Print Network [OSTI]

    Ahsen, Osman Oguz

    2013-01-01

    Optical coherence microscopy (OCM) combines optical coherence tomography (OCT) with confocal microscopy and enables depth resolved visualization of biological specimens with cellular resolution. OCM offers a suitable ...

  19. Phase field model for precipitates in crystals

    E-Print Network [OSTI]

    She, Minggang

    2008-01-01

    Oxygen precipitate caused by oxygen supersaturation is the most common and important defects in Czochralski (CZ) silicon. The presence of oxygen precipitate in silicon wafer has both harmful and beneficial effects on the ...

  20. Aerosol Optical Depths In South/South East Asia

    E-Print Network [OSTI]

    Frank, Thomas D.

    Delhi Gujarat Himachal Pradesh Jammu and Kashmir Kerala Madhya Pradesh Manipur Meghalaya Karnataka Jammu and Kashmir Kerala Madhya Pradesh Manipur Meghalaya Karnataka Nagaland Orissa Punjab Rajasthan Delhi Gujarat Himachal Pradesh Jammu and Kashmir Kerala Madhya Pradesh Manipur Meghalaya Karnataka

  1. Climatology of aerosol optical depth in northcentral Oklahoma: 19922008

    E-Print Network [OSTI]

    dimming; that is, the decrease in solar radiation reaching Earth's surface. Additionally, the wavelength Radiation Measurement Program central facility near Lamont, Oklahoma, since the fall of 1992. Most of the data presented are from the multifilter rotating shadowband radiometer, a narrowband

  2. Assessing the Radiative Impact of Clouds of Low Optical Depth

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B L O O DBiomass and Biofuels BiomassAssembly of aCloud Spatialthe

  3. Thermodvnamics Thermodynamics of Wax Precipitation in

    E-Print Network [OSTI]

    Firoozabadi, Abbas

    Thermodvnamics Thermodynamics of Wax Precipitation in Petroleum Mixtures C. Lira-Galeana and A, Berkeley, CIA 94720 A thermodynamic pamework is developed for calculating wax precipitation in petroleum that precipitated wax consists of several solid phases; each solid phase is described as a pure component

  4. Causal Electron Precipitation in Geospace Weather

    E-Print Network [OSTI]

    Lotko, William

    607080 18 Causal Electron Precipitation in Geospace Weather A Proposal submitted by Dartmouth;NSF: National Space Causal Electron Precipitation in Geospace Weather: W. Lotko, PI Weather Program and global characteristics of electron precipitation influence the magnetosphere-iono- sphere (MI

  5. Computationally Efficient Model for Dopant Precipitation Kinetics

    E-Print Network [OSTI]

    Dunham, Scott

    Computationally Efficient Model for Dopant Precipitation Kinetics Iuval Clejan and Scott T. Dunham and precipitates. Dopant deactivation is typically modeled using a steady­state solid solubility or clustering such as dopant activation/deactivation, it is essential to consider the fact that precipitation involves a range

  6. Changes in precipitation characteristics and extremes

    E-Print Network [OSTI]

    Allan, Richard P.

    Changes in precipitation characteristics and extremes Comparing Mediterranean to change Swiss characteristics Comparing Mediterranean to north-western European precipitation Master Thesis April 2012 Author precipitation 502) dvogel@student.ethz.ch Dr Richard Allan (University of Reading) Prof Dr Martin Wild (ETH

  7. Modelling of Precipitation in Superalloys Aikaterini Plati

    E-Print Network [OSTI]

    Cambridge, University of

    Modelling of Precipitation in Superalloys Aikaterini Plati St. John's College A dissertation, and the size dis- tribution of phase. A review is made on previous attempts to model precipitation. All the proposed models failed to predict the nucleation and growth of the fine secondary precipitates in alloys

  8. Orographic Precipitation in Potentially Unstable Alpine Storms

    E-Print Network [OSTI]

    Houze Jr., Robert A.

    Orographic Precipitation in Potentially Unstable Alpine Storms: MAP IOPs 2b, 3, and 5 Socorro, ICAM/MAP Meeting, Brig, Switzerland, 19-23 May. See Following Pages #12;Orographic Precipitation ahead of strong baroclinic troughs. This pattern is commonly associated with large precipitation amounts

  9. A Nonhomogeneous Hidden Markov Model for Precipitation

    E-Print Network [OSTI]

    Washington at Seattle, University of

    A Nonhomogeneous Hidden Markov Model for Precipitation S. P. Charles James P. Hughes Peter Guttorp for Precipitation James P. Hughes1 Peter Guttorp2 Stephen P. Charles3 September 22, 1997 1Dept. of Biostatistics A stochastic model for relating precipitation occurrences at multiple rain gauge stations to broad

  10. Daily Precipitation Statistics: An Intercomparison between

    E-Print Network [OSTI]

    Zeng, Ning

    Daily Precipitation Statistics: An Intercomparison between NCEP Reanalyses and Observations Vernon-2010. Resolution T382 (~0.3x0.3 degrees). #12;R1, R2, CFSR: Comparison to OI Station-based Precipitation Analyses station-based daily precipitation analysis data set (1979-2006). · The high-resolution reanalysis (CFSR

  11. Research Article Multivariate Interpolation of Precipitation

    E-Print Network [OSTI]

    Mitasova, Helena

    Research Article Multivariate Interpolation of Precipitation Using Regularized Spline with Tension to interpolate daily and annual mean precipitation in regions with complex terrain. Tension, smoothing the spatial model of precipitation in terms of its predictive error, spatial pattern and water balance. 1

  12. Climate Change Effects on California Precipitation and Soil Moisture

    E-Print Network [OSTI]

    Berg, Neil

    2015-01-01

    Low Precipitation of the 2013/14 California2 Increased Precipitation Extremes Over California Under1 Twenty-first Century Precipitation Changes over the Los

  13. Systematic and random error components in satellite precipitation data sets

    E-Print Network [OSTI]

    AghaKouchak, Amir; Mehran, Ali; Norouzi, Hamidreza; Behrangi, Ali

    2012-01-01

    in satellite-based precipitation estimates, J. Geophys.Evaluating high-resolution precipitation products, Bull. Am.retrieved extreme precipitation rates across the central

  14. On the complex conductivity signatures of calcite precipitation

    E-Print Network [OSTI]

    Wu, Yuxin

    2010-01-01

    induced sulfide precipitation, Journal of GeophysicalMicrobial Carbonate precipitation as a soil improvement2005), Effect of precipitation on low frequency electrical

  15. Copper precipitation in cobalt-alloyed precipitation-hardened stainless steel

    E-Print Network [OSTI]

    Medvedeva, Julia E.

    Copper precipitation in cobalt-alloyed precipitation-hardened stainless steel Arpana S. Murthy-strength stainless steel was investigated using three-dimen- sional atom probe tomography. A decrease in copper; Stainless steels; First-principle electron theory; Casting; Precipitation Precipitation-hardened (PH) steels

  16. Capabilities of satellite precipitation datasets to estimate heavy precipitation rates at different temporal accumulations

    E-Print Network [OSTI]

    AghaKouchak, Amir

    Capabilities of satellite precipitation datasets to estimate heavy precipitation rates at different as alternative sources of precipitation information has been argued in numerous studies. Future developments in satellite precipitation algorithms as well as utilization of satellite data in operational applications rely

  17. OROGRAPHIC PRECIPITATION Precipitation that has been generated or modified by topography, typically through the forcing of

    E-Print Network [OSTI]

    Roe, Gerard

    OROGRAPHIC PRECIPITATION Precipitation that has been generated or modified by topography, typically rainfall). Orographic effects on precipitation are also responsible for some of the planet's sharpest perpendicular to the prevailing winds, precipitation is greatly enhanced on the windward side and suppressed

  18. Decoupled elastic prestack depth migration Alexander Druzhinin*

    E-Print Network [OSTI]

    Edinburgh, University of

    Decoupled elastic prestack depth migration $ Alexander Druzhinin* British Geological Survey of the formula for common-shot or common-receiver amplitude-preserving elastic prestack depth migration (Pre to enhance strongly polarized wave modes prior to prestack depth migration (PreSDM) (e.g. Dillon et al., 1988

  19. Resolution of prestack depth migration Ludek Klimes

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Resolution of prestack depth migration Ludek Klimes Department of Geophysics, Faculty of a general 3­D common­shot elastic prestack depth migration in a heterogeneous anisotropic medium is studied. Geophys. AS CR, Prague 457 #12;L. Klimes 1. INTRODUCTION A general formulation of prestack depth migration

  20. The Precipitation Characteristics of ISCCP Tropical Weather States DONGMIN LEE

    E-Print Network [OSTI]

    Kang, In-Sik

    The Precipitation Characteristics of ISCCP Tropical Weather States DONGMIN LEE GESTAR, University The authors examine the daytime precipitation characteristics of the International Satellite Cloud Climatology precipitation dataset used is the Tropical Rainfall Measuring Mission (TRMM) Multisatellite Precipitation

  1. Radioactivity in Precipitation: Methods and Observations from...

    Office of Environmental Management (EM)

    Radioactivity in Precipitation: Methods & Observations from Savannah River Site Dennis Jackson P.E. & Timothy Jannik - Savannah River National Laboratory Teresa Eddy - Savannah...

  2. Proton and electron precipitation over Svalbard -first results from a new Imaging Spectrograph (HiTIES)

    E-Print Network [OSTI]

    Mendillo, Michael

    Proton and electron precipitation over Svalbard - first results from a new Imaging Spectrograph (Hi Manuscript-No. 1 #12;Proc. of Atmospheric Studies by Optical Methods (2001) :1­4 Proton and electron, U.K. Received: 28.11.2001 ­ Accepted: 11.07.2002 Abstract. An unusually intense energetic proton

  3. OPTI 202R Geometrical and Instrumental Optics II Spring 2012

    E-Print Network [OSTI]

    Arizona, University of

    and Relay Lenses Eyepieces Microscopes Vignetting Telecentric Systems Optical Materials and Dispersion Prism Spectrometer Abbe Refractometer Rainbows Thin Prisms Achromatic Thin Prism #12;2 Achromatic Doublet Depth

  4. Very high resolution precipitation climatologies from the Tropical Rainfall Measuring Mission precipitation radar

    E-Print Network [OSTI]

    Nesbitt, Steve

    Very high resolution precipitation climatologies from the Tropical Rainfall Measuring Mission precipitation radar Stephen W. Nesbitt1 and Alison M. Anders2 Received 4 March 2009; revised 6 July 2009 of topography and precipitation, a tropics-wide (±36° latitude) high resolution (0.1°) ten year (1998

  5. PRECIPITATION The images above use daily precipitation statistics from NWS COOP, CoCoRaHS, and

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    PRECIPITATION The images above use daily precipitation statistics from NWS COOP, CoCoRaHS, and CoAgMet stations. From top to bottom, and left to right: most recent 7-days of accumulated precipitation in inches; current month-to-date accumulated precipitation in inches; last month's precipitation as a percent

  6. Precipitation and Snowpack Figure 1: Month to Date Precipitation (1-23 January 2011). Figure 2: 7 Day Precipitation (17-23 January 11).

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    Precipitation and Snowpack Figure 1: Month to Date Precipitation (1-23 January 2011). Figure 2: 7 Day Precipitation (17-23 January 11). Much of the high country in the Upper Colorado River Basin (UCRB.00" for January to date (Figure 1). Over the past seven days, however (Figure 2), precipitation has been

  7. Control of electrode depth in electroslag remelting

    DOE Patents [OSTI]

    Melgaard, David K. (Albuquerque, NM); Shelmidine, Gregory J. (Tijeras, NM); Damkroger, Brian K. (Albuquerque, NM)

    2002-01-01

    A method of and apparatus for controlling an electroslag remelting furnace by driving the electrode at a nominal speed based upon melting rate and geometry while making minor proportional adjustments based on a measured metric of the electrode immersion depth. Electrode drive speed is increased if a measured metric of electrode immersion depth differs from a set point by a predetermined amount, indicating that the tip is too close to the surface of a slag pool. Impedance spikes are monitored to adjust the set point for the metric of electrode immersion depth based upon one or more properties of the impedance spikes.

  8. Modelling simultaneous precipitation reactions in austenitic stainless steels.

    E-Print Network [OSTI]

    Cambridge, University of

    Modelling simultaneous precipitation reactions in austenitic stainless steels. T. Sourmail and H. K developed for simultaneous precipitation reactions in austenitic stainless steels, taking into account for important phases in creep-resistant austenitic stainless steels. 1 Introduction Precipitation phenomena

  9. Reese/Doering 4/2004 TCA PRECIPITATION

    E-Print Network [OSTI]

    Doering, Tamara

    Reese/Doering 4/2004 TCA PRECIPITATION OVERVIEW This is a standard method for precipitating protein-PAGE). It may also be used to precipitate a very dilute or low abundance sample, in which case a carrier protein

  10. PRECIPITATION HARDENING IN Fe-Ni BASE AUSTENITIC ALLOYS

    E-Print Network [OSTI]

    Chang, K.-M.

    2010-01-01

    and H. J. Beattie: "Precipitation Processes in Steels," p.and S. Floreen: "Precipitation from Iron-Base Alloys," G. R.Element Content and Precipitation Behavior of Alloys Ingot

  11. Precipitation amount and intensity measurements with the Ott Pluvio

    E-Print Network [OSTI]

    Wauben, Wiel

    Precipitation amount and intensity measurements with the Ott Pluvio Wiel Wauben Instrumental Department, INSA-IO, KNMI August 26, 2004 #12;#12;Precipitation amount and intensity measurements................................................................................... 1 2. Precipitation sensors................................................................... 5 2

  12. Precipitation Research at UMN: Multiscale variability and Uncertainty in

    E-Print Network [OSTI]

    Foufoula-Georgiou, Efi

    Precipitation Research at UMN: Multiscale variability and Uncertainty in Rainfall Estimation Developing nonparametric schemes for merging multisensor precipitation products Gupta, R., V. Venugopal and E. Foufoula-Georgiou, A methodology for merging multisensor precipitation estimates based on expectation

  13. Optical coherent transients in cold atoms: From free-induction decay to optical precursors

    SciTech Connect (OSTI)

    Chen, J. F.; Wang Shuyuan; Wei Dong; Loy, M. M. T.; Wong, G. K. L.; Du Shengwang [Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon (Hong Kong)

    2010-03-15

    We report theoretical and experimental studies of the propagation of a square-modulated laser pulse through a laser-cooled atomic ensemble of two-level absorbers, as well as through a three-level system with electromagnetically induced transparency. We find that the transmission characteristics over a wide range of optical depth can be fully accounted for as optical coherent transients excited by the wide spectral content of the square-modulated optical pulse. We show that both time-domain atom-field coupled equations and frequency-domain linear dispersion theory give precisely the same description of the optical transients at a weak power limit. At low optical depth with moderate absorption, resonant excitation dominates and free-induction decay (FID) contributes mostly to the transient field. At high optical depth when absorption and propagation effects become significant, lossless optical precursors start to dominate the transient response. By varying the optical depth from 0 to 45, we observe that optical transients evolve gradually from FID to optical precursors. We thus show that FID and optical precursors, which have been considered as two different optical transients for many decades, can be unified within a single theoretical frame and they are the manifestations of the same physical process in two different regimes.

  14. Intermediate depth burial of classified transuranic wastes in arid alluvium

    SciTech Connect (OSTI)

    Cochran, J.R. [Sandia National Labs., Albuquerque, NM (United States). Environmental Risk and Decision Analysis Dept.; Crowe, B.M. [Los Alamos National Lab., NM (United States). Geologic Integration Group; Di Sanza, F. [Dept. of Energy, Las Vegas, NV (United States). Nevada Operations Office

    1999-04-01

    Intermediate depth disposal operations were conducted by the US Department of Energy (DOE) at the DOE`s Nevada Test Site (NTS) from 1984 through 1989. These operations emplaced high-specific activity low-level wastes (LLW) and limited quantities of classified transuranic (TRU) wastes in 37 m (120-ft) deep, Greater Confinement Disposal (GCD) boreholes. The GCD boreholes are 3 m (10 ft) in diameter and founded in a thick sequence of arid alluvium. The bottom 15 m (50 ft) of each borehole was used for waste emplacement and the upper 21 m (70 ft) was backfilled with native alluvium. The bottom of each GCD borehole is almost 200 m (650 ft) above the water table. The GCD boreholes are located in one of the most arid portions of the US, with an average precipitation of 13 cm (5 inches) per year. The limited precipitation, coupled with generally warm temperatures and low humidities results in a hydrologic system dominated by evapotranspiration. The US Environmental Protection Agency`s (EPA`s) 40 CFR 191 defines the requirements for protection of human health from disposed TRU wastes. This EPA standard sets a number of requirements, including probabilistic limits on the cumulative releases of radionuclides to the accessible environment for 10,000 years. The DOE Nevada Operations Office (DOE/NV) has contracted with Sandia National Laboratories (Sandia) to conduct a performance assessment (PA) to determine if the TRU wastes emplaced in the GCD boreholes complies with the EPA`s 40 CFR 191 requirements. This paper describes DOE`s actions undertaken to evaluate whether the TRU wastes in the GCD boreholes will, or will not, endanger human health. Based on preliminary modeling, the TRU wastes in the GCD boreholes meet the EPA`s requirements, and are, therefore, protective of human health.

  15. Estimating tropical cyclone precipitation risk in Texas

    E-Print Network [OSTI]

    Zhu, Laiyin

    This paper uses a new rainfall algorithm to simulate the long-term tropical cyclone precipitation (TCP) climatology in Texas based on synthetic tropical cyclones generated from National Center for Atmospheric Research/National ...

  16. Modelling Precipitation of Carbides in Martensitic Steels

    E-Print Network [OSTI]

    Yamasaki, Shingo

    The purpose of this work was to model carbide precipitation in steels of a quaternary system which includes two substitutional elements. The work focuses on secondary hardening steels which are used for high-strength components, where hydrogen...

  17. Processing NPP Bottoms by Ferrocyanide Precipitation

    SciTech Connect (OSTI)

    Savkin, A. E.; Slastennikov Y. T.; Sinyakin O. G.

    2002-02-25

    The purpose of work is a laboratory test of a technological scheme for cleaning bottoms from radionuclides by use of ozonization, ferrocyanide precipitation, filtration and selective sorption. At carrying out the ferrocyanide precipitation after ozonization, the specific activity of bottoms by Cs{sup 137} is reduced in 100-500 times. It has been demonstrated that the efficiency of ferrocyanide precipitation depends on the quality of consequent filtration. Pore sizes of a filter has been determined to be less than 0.2 {micro}m for complete separation of ferrocyanide residue. The comparison of two technological schemes for cleaning bottoms from radionuclides, characterized by presence of the ferrocyanide precipitation stage has been performed. Application of the proposed schemes allows reducing volumes of radioactive waste in many times.

  18. Minimizing Biases in Radar Precipitation Estimates 

    E-Print Network [OSTI]

    McRoberts, Douglas B

    2014-12-08

    The demand for real-time drought information in recent years led to the development of a suite of objective drought indicators that relies on the high-resolution Stage IV precipitation estimates that are produced each day ...

  19. Testing Competing High-Resolution Precipitation Forecasts

    E-Print Network [OSTI]

    Gilleland, Eric

    Testing Competing High-Resolution Precipitation Forecasts Eric Gilleland Research Prediction Comparison Test D1 D2 D = D1 ­ D2 copyright NCAR 2013 Loss Differential Field #12;Spatial Prediction Comparison Test Introduced by Hering and Genton

  20. Estimation of precipitable water from surface observations 

    E-Print Network [OSTI]

    Kahan, Archie Marion

    1959-01-01

    This dissertation examines the causes of variations in tropical cyclone precipitation (TCP) and the relationship between TCP and river discharge in Texas. The dissertation has three major objectives: 1) investigate the ...

  1. ARIMA Models versus Gene Expression Programming In Precipitation Modeling

    E-Print Network [OSTI]

    Fernandez, Thomas

    ARIMA Models versus Gene Expression Programming In Precipitation Modeling ALINA BRBULESCU and ELENA, Precipitation 1 Introduction Time series are ubiquitous in the real world. They are usually generated

  2. A METHOD FOR AIRCRAFT ICING DIAGNOSIS IN PRECIPITATION

    E-Print Network [OSTI]

    Fabry, Frederic

    A METHOD FOR AIRCRAFT ICING DIAGNOSIS IN PRECIPITATION François A. Turcotte Department precipitation event and its microphysics was simulated using a high resolution three-dimensional kinematic cloud

  3. METR 3223: Physical Meteorology II: Cloud Physics, Atmospheric Electricity and Optics

    E-Print Network [OSTI]

    Droegemeier, Kelvin K.

    METR 3223: Physical Meteorology II: Cloud Physics, Atmospheric Electricity and Optics CLASS: Monday of the physical states and processes of clouds and precipitation as well as atmospheric electricity and optics Thunderstorm charging Lightening Atmospheric optics: Reflection and refraction Optical phenomena GRADES

  4. ARM - Routine AAF Clouds with Low Optical Water Depths (CLOWD) Optical

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Comments?govInstrumentsnoaacrnBarrow, Alaska OutreachCalendarPress ReleasesHighlightsNotableRadiative Observations

  5. ADVANCED CONCEPTS ON REMOTE SENSING OF PRECIPITATION AT

    E-Print Network [OSTI]

    Foufoula-Georgiou, Efi

    ADVANCED CONCEPTS ON REMOTE SENSING OF PRECIPITATION AT MULTIPLE SCALES by SorooSh SorooShian, amirTs Workshop on remoTe sensing of precipiTATion AT mulTiple scAles what: 50 participants from precipitation of remote sensing of precipitation whEn: 15­17 March 2010 whErE: University of California, Irvine Overview

  6. EVALUATION OF FROST HEAVE ON WASTE TRANSFER LINES WITH SHALLOW DEPTHS IN DST (DOUBLE SHELL TANK) FARMS

    SciTech Connect (OSTI)

    HAQ MA

    2009-05-12

    The purpose of this document is to evaluate the effect of frost heave on waste transfer lines with shallow depths in DST farms. Because of the insulation, well compacted sandy material around waste transfer lines, the type of sandy and gravel soil, and relatively low precipitation at Hanford site, it is concluded that waste transfer lines with one foot of soil covers (sandy cushion material and insulation) are not expected to undergo frost heave damaging effects.

  7. Optical Fibers Optics and Photonics

    E-Print Network [OSTI]

    Palffy-Muhoray, Peter

    Optical Fibers Optics and Photonics Dr. Palffy-Muhoray Ines Busuladzic Department of Theoretical and Applied Mathematics The University of Akron April 21, 2008 #12;Outline · History of optical fibers · What are optical fibers? · How are optical fibers made? · Light propagation through optical fibers · Application

  8. The Square Root Depth Wave Equations

    E-Print Network [OSTI]

    Colin C. Cotter; Darryl D. Holm; James R. Percival

    2009-12-11

    We introduce a set of coupled equations for multilayer water waves that removes the ill-posedness of the multilayer Green-Naghdi (MGN) equations in the presence of shear. The new well-posed equations are Hamiltonian and in the absence of imposed background shear they retain the same travelling wave solutions as MGN. We call the new model the Square Root Depth equations, from the modified form of their kinetic energy of vertical motion. Our numerical results show how the Square Root Depth equations model the effects of multilayer wave propagation and interaction, with and without shear.

  9. Structure Profile by a Model of Precipitation

    E-Print Network [OSTI]

    Wang, Zhenggang

    2009-01-01

    The organizational structure of a network is investigated with a simulated precipitation model which does not make use of prior knowledge about the community structure of the network. The result is presented as a structure profile through which various definitions of communities can be applied for specific applications. The simulated precipitation model performs the grouping of nodes so that nodes belonging to the same 'community' automatically aggregate, thereby revealing regions of the adjacency matrix with denser interconnections. The process is analogous to massive particles precipitating towards the lower potential layer. Without loss of the infrastructure information, a community structure profile of a network can be obtained as the ground state of the Hamiltonian. The method is also applicable to directed and weighted networks.

  10. Depth Profiling Of Small Molecule Ingress Into Planar and Cylindrical Materials Using NRA and PIXE

    SciTech Connect (OSTI)

    Smith, Richard W.; Massingham, Gary; Clough, Anthony S. [Department of Physics, University of Surrey, Guildford, Surrey, GU2 7XH (United Kingdom)

    2003-08-26

    The use of a 3He ion micro-beam technique to study the ingress/diffusion of water into a planar fibre optic grade glass and a cylindrical drug-release polymer is described. One-dimensional concentration profiles showing the depth of water ingress were produced. The depth of penetration of water into the glass was measured by fitting a gaussian function to the concentration profile. The ingress of water into the drug-release polymer was found to be Fickian and a cylindrical diffusion model used to obtain a diffusion coefficient.

  11. High volume, multiple use, portable precipitator

    DOE Patents [OSTI]

    Carlson, Duane C. (N. Augusta, SC)

    2011-10-25

    A portable high air volume electrostatic collection precipitator for analyzing air is provided which is a relatively small, self-contained device. The device has a collection electrode adapted to carry a variety of collecting media. An air intake is provided such that air to be analyzed flows through an ionization section with a transversely positioned ionization wire to ionize analytes in the air, and then flows over the collection electrode where ionized analytes are collected. Air flow is maintained at but below turbulent flow, Ionizable constituents in the air are ionized, attracted to the collection electrode, and precipitated in the selected medium which can be removed for analysis.

  12. Helices in the wake of precipitation fronts

    E-Print Network [OSTI]

    Shibi Thomas; Istvan Lagzi; Ferenc Molnar Jr; Zoltan Racz

    2013-08-30

    A theoretical study of the emergence of helices in the wake of precipitation fronts is presented. The precipitation dynamics is described by the Cahn-Hilliard equation and the fronts are obtained by quenching the system into a linearly unstable state. Confining the process onto the surface of a cylinder and using the pulled-front formalism, our analytical calculations show that there are front solutions that propagate into the unstable state and leave behind a helical structure. We find that helical patterns emerge only if the radius of the cylinder R is larger than a critical value R>R_c, in agreement with recent experiments.

  13. Exploring Virtual Depth for Automotive Instrument Cluster

    E-Print Network [OSTI]

    Exploring Virtual Depth for Automotive Instrument Cluster Concepts Nora Broy1,2,3 , Benedikt Zierer instrument cluster. Permission to make digital or hard copies of part or all of this work for personal more pronounced as auto-stereoscopic displays become available for the car. For instance, H¨akkil¨a et

  14. Modelling Precipitation of Carbides in Martensitic Steels

    E-Print Network [OSTI]

    Cambridge, University of

    Modelling Precipitation of Carbides in Martensitic Steels Shingo Yamasaki Darwin College appreciate Dr S. Aihara and Mr T. Tarui at Nippon Steel Corporation for giving me the opportunity to study at Nippon Steel Corporation. I am indebted to grants from the Personnel Division of Nippon Steel Corporation

  15. Dilution physics modeling: Dissolution/precipitation chemistry

    SciTech Connect (OSTI)

    Onishi, Y.; Reid, H.C.; Trent, D.S.

    1995-09-01

    This report documents progress made to date on integrating dilution/precipitation chemistry and new physical models into the TEMPEST thermal-hydraulics computer code. Implementation of dissolution/precipitation chemistry models is necessary for predicting nonhomogeneous, time-dependent, physical/chemical behavior of tank wastes with and without a variety of possible engineered remediation and mitigation activities. Such behavior includes chemical reactions, gas retention, solids resuspension, solids dissolution and generation, solids settling/rising, and convective motion of physical and chemical species. Thus this model development is important from the standpoint of predicting the consequences of various engineered activities, such as mitigation by dilution, retrieval, or pretreatment, that can affect safe operations. The integration of a dissolution/precipitation chemistry module allows the various phase species concentrations to enter into the physical calculations that affect the TEMPEST hydrodynamic flow calculations. The yield strength model of non-Newtonian sludge correlates yield to a power function of solids concentration. Likewise, shear stress is concentration-dependent, and the dissolution/precipitation chemistry calculations develop the species concentration evolution that produces fluid flow resistance changes. Dilution of waste with pure water, molar concentrations of sodium hydroxide, and other chemical streams can be analyzed for the reactive species changes and hydrodynamic flow characteristics.

  16. Quantifying precipitation suppression due to air Pollution

    E-Print Network [OSTI]

    Li, Zhanqing

    Quantifying precipitation suppression due to air Pollution First author: Amir Givati The Hebrew January 2004 #12;ABSTRACT: Urban and industrial air pollution has been shown qualitatively to suppress. The evidence suggests that air pollution aerosols that are incorporated in orographic clouds slow down cloud

  17. Superconductor precursor mixtures made by precipitation method

    DOE Patents [OSTI]

    Bunker, Bruce C. (Albuquerque, NM); Lamppa, Diana L. (Albuquerque, NM); Voigt, James A. (Albuquerque, NM)

    1989-01-01

    Method and apparatus for preparing highly pure homogeneous precursor powder mixtures for metal oxide superconductive ceramics. The mixes are prepared by instantaneous precipitation from stoichiometric solutions of metal salts such as nitrates at controlled pH's within the 9 to 12 range, by addition of solutions of non-complexing pyrolyzable cations, such as alkyammonium and carbonate ions.

  18. Quiet Time Precipitation Patterns of Energetic Particles

    E-Print Network [OSTI]

    Kallenrode, May-Britt

    in some of the most important parameters that de- pend on solar activity - Kp index, global average Solar Wind Speed and Particle Fluxes 9 4 Precipitation Patterns 11 4.1 Global Average Flux a potential hazard. This is evidenced by an especially strong solar storm on September 1-2, 1859, which

  19. in situ Calcite Precipitation for Contaminant Immobilization

    SciTech Connect (OSTI)

    Yoshiko Fujita; Robert W. Smith

    2009-08-01

    in situ Calcite Precipitation for Contaminant Immobilization Yoshiko Fujita (Yoshiko.fujita@inl.gov) (Idaho National Laboratory, Idaho Falls, Idaho, USA) Robert W. Smith (University of Idaho-Idaho Falls, Idaho Falls, Idaho, USA) Subsurface radionuclide and trace metal contaminants throughout the U.S. Department of Energy (DOE) complex pose one of DOE’s greatest challenges for long-term stewardship. One promising stabilization mechanism for divalent trace ions, such as the short-lived radionuclide strontium-90, is co-precipitation in calcite. Calcite, a common mineral in the arid western U.S., can form solid solutions with trace metals. The rate of trace metal incorporation is susceptible to manipulation using either abiotic or biotic means. We have previously demonstrated that increasing the calcite precipitation rate by stimulating the activity of urea hydrolyzing microorganisms can result in significantly enhanced Sr uptake. Urea hydrolysis causes the acceleration of calcium carbonate precipitation (and trace metal co-precipitation) by increasing pH and alkalinity, and also by liberating the reactive cations from the aquifer matrix via exchange reactions involving the ammonium ion derived from urea: H2NCONH2 + 3H2O ? 2NH4+ + HCO3- + OH- urea hydrolysis >X:2Ca + 2NH4+ ? 2>X:NH4 + Ca2+ ion exchange Ca2+ + HCO3- + OH- ? CaCO3(s) + H2O calcite precipitation where >X: is a cation exchange site on the aquifer matrix. This contaminant immobilization approach has several attractive features. Urea hydrolysis is catalyzed by the urease enzyme, which is produced by many indigenous subsurface microorganisms. Addition of foreign microbes is unnecessary. In turn the involvement of the native microbes and the consequent in situ generation of reactive components in the aqueous phase (e.g., carbonate and Ca or Sr) can allow dissemination of the reaction over a larger volume and/or farther away from an amendment injection point, as compared to direct addition of the reactants at a well (which can lead to clogging). A final particularly attractive characteristic of this approach is its long-term sustainability; the remediation scheme is geared toward environments that are already saturated with respect to calcite, and in such systems the bulk of any newly precipitated calcite will remain stable once engineered manipulations cease. This means that the co-precipitated contaminants will be effectively sequestered over the long term. We are currently conducting integrated field, laboratory, and computational research to evaluate a) the relationships between urea hydrolysis rate, calcite precipitation rate, and trace metal partitioning under environmentally relevant conditions; and b) the coupling between flow/flux manipulations and calcite precipitate distribution and metal uptake. We are also assessing the application of geophysical and molecular biological tools to monitor the relevant chemical and physical processes. The primary emphasis is on field-scale processes, with the laboratory and modeling activities designed specifically to support the field studies. Field experiments are being conducted in perched water (vadose zone) at the Vadose Zone Research Park (VZRP) at the Idaho National Laboratory; the VZRP provides an uncontaminated setting that is an analog of the 90Sr-contaminated vadose zone at the Idaho Nuclear Technology and Engineering Center. A summary of results to date will be presented.

  20. Measurements of aerosol vertical profiles and optical properties during INDOEX

    E-Print Network [OSTI]

    , and the Kaashidhoo Climate Observatory (KCO) in the Maldives. Sun photometers were used to provide aerosol optical depths (AOD) needed to calibrate the MPL. This study focuses on the height distribution and optical trajectories, radiosonde profiles of temperature and humidity, and aerosol concentration and optical

  1. Gaussian packet prestack depth migration. Part 2: Optimized Gaussian packets

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Gaussian packet prestack depth migration. Part 2: Optimized Gaussian packets V#19;aclav Bucha packet prestack depth migration consists of four basic steps: (a) preparation of a velocity model su to the Gaussian packet prestack depth migration. Keywords Gaussian packets, Gaussian beams, prestack depth

  2. Sensitivity of tropical precipitation extremes to climate change

    E-Print Network [OSTI]

    O'Gorman, Paul Ambrose

    Precipitation extremes increase in intensity over many regions of the globe in simulations of a warming climate1, 2, 3. The rate of increase of precipitation extremes in the extratropics is consistent across global climate ...

  3. Reduction of tropical land region precipitation variability via transpiration

    E-Print Network [OSTI]

    Lee, Jung-Eun

    Tropical rainforests are known to exhibit low intraseasonal precipitation variability compared with oceanic areas with similar mean precipitation in observations and models. In the present study, the potential role of ...

  4. A critical analysis of bulk precipitation recycling models

    E-Print Network [OSTI]

    Fitzmaurice, Jean Anne

    2007-01-01

    Precipitation recycling is the contribution of local land evaporation to the precipitation of a region. The significant local evaporative contribution to rainfall in many continental regions highlights the potential ...

  5. Diurnal Precipitation Variations in South-Central New Mexico

    E-Print Network [OSTI]

    Tucker, Donna F.

    1993-07-01

    Orographic forcing of diurnal precipitation variations in south-central New Mexico is examined. Harmonic analysis reveals a strong diurnal cycle in precipitation frequency at all stations studied. In addition, relatively ...

  6. Characterization of uncertainty in remotely-sensed precipitation estimates

    E-Print Network [OSTI]

    Alemohammad, Seyed Hamed

    2015-01-01

    Satellite-derived retrievals of precipitation have increased in availability and improved in quality over the last decade. There are now several satellites in orbit with instruments capable of precipitation retrieval with ...

  7. Caribbean Precipitation in Observations and IPCC AR4 Models 

    E-Print Network [OSTI]

    Martin, Elinor Ruth

    2012-10-19

    Caribbean precipitation and mechanisms related to precipitation in the region. Not only were errors seen in the annual mean, with CMIP models underestimating both rainfall and sea surface temperature (SST) and AMIP models overestimating rainfall, the annual...

  8. Future precipitation changes and their implications for tropical peatlands

    E-Print Network [OSTI]

    Yang, Zong-Liang

    Future precipitation changes and their implications for tropical peatlands Wenhong Li,1 Robert E. Dickinson, R. Fu, G.-Y. Niu, Z.-L. Yang, and J. G. Canadell (2007), Future precipitation changes

  9. precipitation frequency & intensity in instantaneous and aggregated data

    E-Print Network [OSTI]

    Kuang, Zhiming

    precipitation frequency & intensity in instantaneous and aggregated data Michela Biasutti1, Sandra - Ocean Implications (and a suggestion for model diagnostics) Outline #12;4 Minute-by-minute precipitation

  10. Production of crystalline refractory metal oxides containing colloidal metal precipitates and useful as solar-effective absorbers

    DOE Patents [OSTI]

    Narayan, Jagdish (Knoxville, TN); Chen, Yok (Oak Ridge, TN)

    1983-01-01

    This invention is a new process for producing refractory crystalline oxides having improved or unusual properties. The process comprises the steps of forming a doped-metal crystal of the oxide; exposing the doped crystal in a bomb to a reducing atmosphere at superatmospheric pressure and a temperature effecting precipitation of the dopant metal in the crystal lattice of the oxide but insufficient to effect net diffusion of the metal out of the lattice; and then cooling the crystal. Preferably, the cooling step is effected by quenching. The process forms colloidal precipitates of the metal in the oxide lattice. The process may be used, for example, to produce thermally stable black MgO crystalline bodies containing magnetic colloidal precipitates consisting of about 99% Ni. The Ni-containing bodies are solar-selective absorbers, having a room-temperature absorptivity of about 0.96 over virtually all of the solar-energy spectrum and exhibiting an absorption edge in the region of 2 .mu.m. The process parameters can be varied to control the average size of the precipitates. The process can produce a black MgO crystalline body containing colloidal Ni precipitates, some of which have the face-centered-cubic structure and others of which have the body-centered cubic structure. The products of the process are metal-precipitate-containing refractory crystalline oxides which have improved or unique optical, mechanical, magnetic, and/or electronic properties.

  11. Precipitation-Regulated Star Formation in Galaxies

    E-Print Network [OSTI]

    Voit, G Mark; O'Shea, Brian W; Donahue, Megan

    2015-01-01

    Galaxy growth depends critically on the interplay between radiative cooling of cosmic gas and the resulting energetic feedback that cooling triggers. This interplay has proven exceedingly difficult to model, even with large supercomputer simulations, because of its complexity. Nevertheless, real galaxies are observed to obey simple scaling relations among their primary observable characteristics. Here we show that a generic emergent property of the interplay between cooling and feedback can explain the observed scaling relationships between a galaxy's stellar mass, its total mass, and its chemical enrichment level, as well as the relationship between the average orbital velocity of its stars and the mass of its central black hole. These relationships naturally result from any feedback mechanism that strongly heats a galaxy's circumgalactic gas in response to precipitation of colder clouds out of that gas, because feedback then suspends the gas in a marginally precipitating state.

  12. Biologically produced acid precipitable polymeric lignin

    DOE Patents [OSTI]

    Crawford, Don L. (Moscow, ID); Pometto, III, Anthony L. (Moscow, ID)

    1984-01-01

    A water soluble, acid precipitable polymeric degraded lignin (APPL), having a molecular weight of at least 12,000 daltons, and comprising, by percentage of total weight, at least three times the number of phenolic hydroxyl groups and carboxylic acid groups present in native lignin. The APPL may be modified by chemical oxidation and reduction to increase its phenolic hydroxyl content and reduce the number of its antioxidant inhibitory side chains, thereby improving antioxidant properties.

  13. Capacitance studies of cobalt oxide films formed via electrochemical precipitation

    E-Print Network [OSTI]

    Weidner, John W.

    Capacitance studies of cobalt oxide films formed via electrochemical precipitation Venkat prepared by electrochemically precipitating the hydroxide and heating it in air to form Co3O4, it is desirable to study the generality of the electrochemical precipitation technique as a means of fab- ricating

  14. AEROSOL-PRECIPITATION INTERACTIONS IN THE SOUTHERN APPALACHIAN MOUNTAINS

    E-Print Network [OSTI]

    AEROSOL-PRECIPITATION INTERACTIONS IN THE SOUTHERN APPALACHIAN MOUNTAINS A Thesis by GINGER MARIE of the requirements for the degree of MASTER OF ARTS May 2011 Department of Geography and Planning #12;AEROSOL-PRECIPITATION and Graduate Studies #12;Copyright by Ginger Marie Kelly 2011 All Rights Reserved #12;iv ABSTRACT AEROSOL-PRECIPITATION

  15. PRICING PRECIPITATION BASED DERIVATIVES RENE CARMONA AND PAVEL DIKO

    E-Print Network [OSTI]

    Carmona, Rene

    PRICING PRECIPITATION BASED DERIVATIVES REN´E CARMONA AND PAVEL DIKO ABSTRACT. We consider the problem of pricing a derivative contract written on the precipitation at a specific location during of the underlying precipitation. Our model is based on pulse Poisson process models widely used in hydrology. We

  16. TECHNICAL BRIEF Mass spectrometry-based immuno-precipitation

    E-Print Network [OSTI]

    Lamond, Angus I.

    TECHNICAL BRIEF Mass spectrometry-based immuno-precipitation proteomics ­ The user's guide Sara ten Revised: December 7, 2010 Accepted: December 10, 2010 Immuno-precipitation (IP) experiments using MS but not described in the form of protocols. Keywords: Cell biology / Cumulative analysis / Immuno-precipitation

  17. Influences of soil moisture and vegetation on convective precipitation forecasts

    E-Print Network [OSTI]

    Robock, Alan

    Influences of soil moisture and vegetation on convective precipitation forecasts over the United and vegetation on 30 h convective precipitation forecasts using the Weather Research and Forecasting model over, the complete removal of vegetation produced substantially less precipitation, while conversion to forest led

  18. Precipitation amount and intensity measurements using a windscreen

    E-Print Network [OSTI]

    Wauben, Wiel

    Precipitation amount and intensity measurements using a windscreen Wiel Wauben Instrumental Department, INSA-IO, KNMI June 21, 2004 #12;#12;Precipitation amount and intensity measurements using................................................................................... 1 2. Precipitation gauge and measurement setup............................ 3 2.1. KNMI electronic

  19. ULF Waves Associated with Enhanced Subauroral Proton Precipitation

    E-Print Network [OSTI]

    California at Berkeley, University of

    ULF Waves Associated with Enhanced Subauroral Proton Precipitation Thomas J. Immel, S. B. Mende, H Abstract. Several types of sub-auroral proton precipitation events have been identified using and solar wind conditions and the mechanism driving the precipitation has often been assumed

  20. Modelling precipitation of niobium carbide in austenite: multicomponent diffusion, capillarity,

    E-Print Network [OSTI]

    Cambridge, University of

    Modelling precipitation of niobium carbide in austenite: multicomponent diffusion, capillarity for the overall transformation kinetics of niobium carbide precipitation in austenite that takes into account the precipitation and coarsening reactions to be treated in a single model. The model is compared with published

  1. Stochastic precipitation generation based on a multivariate autoregression model

    E-Print Network [OSTI]

    Borchers, Brian

    Stochastic precipitation generation based on a multivariate autoregression model Oleg V. Makhnin of stochastic precipitation generation has long been of interest. A good generator should produce time series with statistical properties to match those of the real precipitation. Here, we present a multivariate

  2. Tubular precipitation and redox gradients on a bubbling template

    E-Print Network [OSTI]

    Goldstein, Raymond E.

    Tubular precipitation and redox gradients on a bubbling template David A. Stone* and Raymond E) Tubular structures created by precipitation abound in nature, from chimneys at hydrothermal vents to soda oxides precipitate on the surface of bubbles that linger at the tube rim and then detach, leaving behind

  3. SPATIOTEMPORAL MODELS IN THE ESTIMATION OF AREA PRECIPITATION

    E-Print Network [OSTI]

    Lisbon, University of

    SPATIOTEMPORAL MODELS IN THE ESTIMATION OF AREA PRECIPITATION Eduardo Severino and Teresa Alpuim University of Lisbon, Portugal SUMMARY Since area precipitation measurements are difficult to obtain because of the large spatial and time variability of the precipitation field, the development of statistical methods

  4. Precipitation event distribution in Central Argentina: spatial and temporal patterns

    E-Print Network [OSTI]

    Nacional de San Luis, Universidad

    Precipitation event distribution in Central Argentina: spatial and temporal patterns Patricio N, C1417DSE Buenos Aires, Argentina ABSTRACT The annual amount of precipitation inputs received, these inputs have to escape runoff, favoured by large and less frequent precipitation events, and evaporation

  5. Precipitation distributions for explicit versus parameterized convection in a

    E-Print Network [OSTI]

    Wirosoetisno, Djoko

    Precipitation distributions for explicit versus parameterized convection in a large-domain high.J. and Lister, G.M.S. (2012) Precipitation distributions for explicit versus parameterized convection in a large. Meteorol. Soc. 138: 1692­1708, October 2012 A Precipitation distributions for explicit versus parametrized

  6. Energetic ion precipitation at Titan T. E. Cravens,1

    E-Print Network [OSTI]

    California at Berkeley, University of

    Energetic ion precipitation at Titan T. E. Cravens,1 I. P. Robertson,1 S. A. Ledvina,2 D. Mitchell observed in Saturn's outer magnetosphere and can precipitate into Titan's atmosphere where they deposit energy, ionize, and drive ionospheric chemistry. Ion production rates caused by this precipitation

  7. Precipitation and Northern Hemisphere regimes Christoph C. Raiblea,*, Ute Lukschb

    E-Print Network [OSTI]

    Raible, Christoph C.

    Precipitation and Northern Hemisphere regimes Christoph C. Raiblea,*, Ute Lukschb , Klaus-correlations between the precipitation in the tropical and subtropical western Atlantic illustrate the changes of the Hadley cell with El Nin~o/Southern Oscillation (ENSO).The precipitation anomaly pattern in the north

  8. ORIGINAL PAPER Winter westerly disturbance dynamics and precipitation

    E-Print Network [OSTI]

    Jones, Charles

    ORIGINAL PAPER Winter westerly disturbance dynamics and precipitation in the western Himalaya, allowing for a comprehensive study of the factors that relate WWD to orographic precipitation of disturbances, the state of the background environ- ment during their propagation, and precipitation totals

  9. Precipitation hydrometeor type relative to the mesoscale airflow in mature

    E-Print Network [OSTI]

    Houze Jr., Robert A.

    Precipitation hydrometeor type relative to the mesoscale airflow in mature oceanic deep convection systems whose contiguous precipitation spans at least ~100 km in one direction [Houze 2004]. These cloud systems are composed of small, intensely precipitating convective regions and expansive stratiform regions

  10. Flood or Drought: How Do Aerosols Affect Precipitation?

    E-Print Network [OSTI]

    Daniel, Rosenfeld

    Flood or Drought: How Do Aerosols Affect Precipitation? Daniel Rosenfeld,1 * Ulrike Lohmann,2 and the initiation of precipitation. Large concentrations of human-made aerosols have been reported to both decrease hand, heavily polluted clouds evaporate much of their water before precipitation can occur, if they can

  11. Appendix to regridding NCDCs meteorological data 1 PRECIPITATION

    E-Print Network [OSTI]

    Washington at Seattle, University of

    10 Appendix to regridding NCDCs meteorological data 1 PRECIPITATION 1.1 cmb_prcp.dly Daily precipitation file downloaded directly from Earthinfo CDs. One year is on one line although you can not see.2 cmb_prcp.sta Precipitation station file downloaded from Earthinfo CDs MT|24|2827|EUREKA RS Prcp|771

  12. AGCM Precipitation Biases in the Tropical Atlantic M. BIASUTTI

    E-Print Network [OSTI]

    Biasutti, Michela

    AGCM Precipitation Biases in the Tropical Atlantic M. BIASUTTI Lamont-Doherty Earth Observatory precipitation in the Southern Hemisphere in boreal spring and in the Caribbean region in boreal summer precipitation maximum does not occur there. This is the case even though these GCMs accurately place the maximum

  13. ORIGINAL PAPER An improved reconstruction of MayJune precipitation

    E-Print Network [OSTI]

    Grissino-Mayer, Henri D.

    ORIGINAL PAPER An improved reconstruction of May­June precipitation using tree-ring data from developed a high quality reconstruction of May­June precipitation for the interior region of southwest- ern . Tree ring . Precipitation reconstruction . Black pine . Volcanic eruption . Turkey Introduction

  14. Impact of anthropogenic absorbing aerosols on clouds and precipitation

    E-Print Network [OSTI]

    Impact of anthropogenic absorbing aerosols on clouds and precipitation: A review of recent and precipitation: A review of recent progresses Chien Wang Massachusetts Institute of Technology, E19-439K, 77 atmospheric circulation, and hence clouds and precipitation. Recent studies have suggested that the changes

  15. IMPACT OF AEROSOLS ON CONVECTIVE CLOUDS AND PRECIPITATION

    E-Print Network [OSTI]

    Zeng, Ning

    IMPACT OF AEROSOLS ON CONVECTIVE CLOUDS AND PRECIPITATION Wei-Kuo Tao,1 Jen-Ping Chen,2 Zhanqing Li effects on clouds could further extend to precipitation, both through the formation of cloud particles mechan- isms behind these effects, in particular, the ones connected to precipitation, are not yet well

  16. ORIGINAL PAPER Global warming impact on the dominant precipitation

    E-Print Network [OSTI]

    Evans, Jason

    ORIGINAL PAPER Global warming impact on the dominant precipitation processes in the Middle East a good job of simulating the precipitation for most of the domain, though it performs relatively poorly. The results also show widespread decreases in precipitation over the eastern Mediterranean and Turkey

  17. LOCALIZED PRECIPITATION, LAKE-EFFECT STORMS, AND EROSION ON MARS.

    E-Print Network [OSTI]

    LOCALIZED PRECIPITATION, LAKE-EFFECT STORMS, AND EROSION ON MARS. Edwin. S. Kite*, Earth], this hypothesis has never been modeled. We report numerical tests of localized precipitation using MRAMS ephemeral lakes. For a given vapor injection rate or lake surface temperature, localized precipitation

  18. Precipitation processes in the Middle East , R. Smitha

    E-Print Network [OSTI]

    Evans, Jason

    Precipitation processes in the Middle East J. Evansa , R. Smitha and R.Oglesbyb a Dept. Geology and topography in generating precipitation in the Middle East. The model is run for five years (1990 thru 1994 that exhibit precipitation regimes disparate from one-another are identified and examined. The models ability

  19. The sensitivity of hillslope bedrock erosion to precipitation

    E-Print Network [OSTI]

    Amundson, Ronald

    The sensitivity of hillslope bedrock erosion to precipitation Justine J. Owen,1 * Ronald Amundson,1) through their dependence on soil thickness, and precipitation is an important control on soil formation. Surprisingly though, compilations of hillslope denudation rates suggest little precipitation sensitivity

  20. PRECIPITATION OF RADIATION BELT ELECTRONS BY LIGHTNING-GENERATED

    E-Print Network [OSTI]

    PRECIPITATION OF RADIATION BELT ELECTRONS BY LIGHTNING-GENERATED MAGNETOSPHERICALLY REFLECTING-order model to estimate the L-shell dependence of the precipitation flux of energetic electrons driven by MR L-shell extent) peak in the precipitation signature can result due to the focusing of the whistler

  1. Precipitation controls Sahel greening trend Thomas Hickler,1

    E-Print Network [OSTI]

    Ardö, Jonas

    Precipitation controls Sahel greening trend Thomas Hickler,1 Lars Eklundh,1 Jonathan W. Seaquist,2 variability between 1982 and 1998. Changes in precipitation were identified as the primary driver. Smith, J. Ardo¨, L. Olsoon, M. T. Sykes, and M. Sjo¨stro¨m (2005), Precipitation controls Sahel greening

  2. Urgent need for a common metric to make precipitation

    E-Print Network [OSTI]

    Dukes, Jeffrey

    Letters Urgent need for a common metric to make precipitation manipulation experiments comparable of altered precipitation patterns, by contrast, have received far less atten- tion. The results of precipitation manipulation experiments were only recently synthesized for the first time (Wu et al., 2011

  3. Trends of extreme precipitation in eastern China and their possible causes

    E-Print Network [OSTI]

    2015-01-01

    in different-class precipitation over eastern China un- derwet and dry season precipitation. Nature Geoscience, 6, 263–to the orographic precipitation in the Qinling Mountains.

  4. Species-specific phenological responses to winter temperature and precipitation in a water-limited ecosystem

    E-Print Network [OSTI]

    Mazer, SJ; Gerst, KL; Matthews, ER; Evenden, A

    2015-01-01

    to winter temperature and precipitation in a water-limitedthe timing and magnitude of precipitation (i.e. , larger butof monthly and annual precipitation (PPT, mm), mean monthly

  5. Potential remediation approach for uranium-contaminated groundwaters through potassium uranyl vanadate precipitation

    E-Print Network [OSTI]

    Tokunaga, T.K.

    2010-01-01

    and secondary phase precipitation in aqueous suspension.Potassium Uranyl Vanadate Precipitation Tetsu K. Tokunaga,uranium (U) through precipitation under oxidizing conditions

  6. Impacts of precipitation seasonality and ecosystem types on evapotranspiration in the Yukon River Basin, Alaska

    E-Print Network [OSTI]

    Yuan, Wenping; Liu, Shuguang; Liu, Heping; Randerson, James T; Yu, Guirui; Tieszen, Larry L

    2010-01-01

    and K. Tan (2005), Precipitation patterns alter growth ofobserved global land precipitation variations during 1900 –and changes in global precipitation patterns: What do we

  7. Assessing surface water consumption using remotely-sensed groundwater, evapotranspiration, and precipitation

    E-Print Network [OSTI]

    Anderson, Ray G; Lo, Min-Hui; Famiglietti, James S

    2012-01-01

    in satellite-based precipitation measurements, Geophys. Res.and A. Y. Hou (2010), Global Precipitation Measurement (GPM)2005), Eval- uation of precipitation estimates from PRISM

  8. High Recovery Desalination of Brackish Water by Chemically-Enhanced Seeded Precipitation

    E-Print Network [OSTI]

    McCool, Brian Carey

    2012-01-01

    Improved compact accelerated precipitation softening (CAPS).Using Interstage Calcium Precipitation. Desalination, 2012.Enhanced Seeded Precipitation,” Desalination, 264, 256-267 (

  9. Geophysical monitoring and reactive transport modeling of ureolytically-driven calcium carbonate precipitation

    E-Print Network [OSTI]

    Wu, Y.

    2012-01-01

    P. , Microbial Carbonate precipitation as a soil improvementTo Enhance Calcite Precipitation . Environ. Sci. Technol.Calcium Carbonate Precipitation by Ureolytic Subsurfface

  10. Precipitation response to land subsurface hydrologic processes in atmospheric general circulation model simulations

    E-Print Network [OSTI]

    Lo, Min-Hui; Famiglietti, James S

    2011-01-01

    LO AND FAMIGLIETTI: PRECIPITATION RESPONSE TO LAND PROCESSES2006), Regional tropical precipitation change mechanisms inrobustness of tropical precipitation asymmetry, J. Clim. ,

  11. An analysis of winter precipitation in the northeast and a winter weather precipitation type forecasting tool for New York City 

    E-Print Network [OSTI]

    Gordon, Christopher James

    1999-01-01

    Winter storms produce a wide array of precipitation types across the northeast United States. Immense problems are created for all parts of today's society when the precipitation falls in the form of snow or freezing rain. ...

  12. Optical microspectrometer

    DOE Patents [OSTI]

    Sweatt, William C.; Christenson, Todd R.

    2004-05-25

    An optical microspectrometer comprises a grism to disperse the spectra in a line object. A single optical microspectrometer can be used to sequentially scan a planar object, such as a dye-tagged microchip. Because the optical microspectrometer is very compact, multiple optical microspectrometers can be arrayed to provide simultaneous readout across the width of the planar object The optical microspectrometer can be fabricated with lithographic process, such as deep X-ray lithography (DXRL), with as few as two perpendicular exposures.

  13. Generalized methodology for thermal diffusivity depth profile reconstruction in semi-infinite and finitely thick inhomogeneous solids

    E-Print Network [OSTI]

    Mandelis, Andreas

    . The amplitude and phase of the thermal wave generated by an optical or other thermal energy sourceGeneralized methodology for thermal diffusivity depth profile reconstruction in semi, Canada and Manufacturing Research Corporation of Ontario, 1075 North Service Road West, Suite 201

  14. Evaluation of precipitates used in strainer head loss testing : Part I. chemically generated precipitates.

    SciTech Connect (OSTI)

    Bahn, C. B.; Kasza, K. E.; Shack, W. J.; Natesan, K.; Klein, P.; Nuclear Engineering Division

    2009-12-01

    The purpose of the current program was to evaluate the properties of chemical precipitates proposed by industry that have been used in sump strainer head loss testing. Specific precipitates that were evaluated included aluminum oxyhydroxide (AlOOH) and sodium aluminum silicate (SAS) prepared according to the procedures in WCAP-16530-NP, along with precipitates formed from injecting chemicals into the test loop according to the procedure used by one sump strainer test vendor for U.S. pressurized water reactors. The settling rates of the surrogate precipitates are strongly dependent on their particle size and are reasonably consistent with those expected from Stokes Law or colloid aggregation models. Head loss tests showed that AlOOH and SAS surrogates are quite effective in increasing the head loss across a perforated pump inlet strainer that has an accumulated fibrous debris bed. The characteristics of aluminum hydroxide precipitate using sodium aluminate were dependent on whether it was formed in high-purity or ordinary tap water and whether excess silicate was present or not.

  15. Wax precipitation for gas condensate fluids was studied in detail with a thermodynamic model. It was found that the precipitated

    E-Print Network [OSTI]

    Firoozabadi, Abbas

    Summary Wax precipitation for gas condensate fluids was studied in detail with a thermodynamic model. It was found that the precipitated wax phase can exhibit retrograde phenomena similar of precipitated wax may first increase, then decrease, then increase again. The effect of pressure on wax

  16. Integrated optical filters using Bragg gratings and resonators

    E-Print Network [OSTI]

    Khan, Mohammad Jalal

    2002-01-01

    This thesis provides an in-depth study of optical filters made using integrated Bragg gratings and Bragg resonators. Various topologies for making add/drop filters using integrated gratings are outlined. Each class of ...

  17. Electro-optical Modulation in Graphene Integrated Photonic Crystal Nanocavities

    E-Print Network [OSTI]

    Gan, Xuetao

    We demonstrate high-contrast electro-optic modulation in a graphene integrated photonic crystal nanocavity, providing a modulation depth of more than 10 dB at telecom wavelengths. This work shows the feasibility of ...

  18. Gulf of Mexico Proved Reserves By Water Depth, 2009

    Gasoline and Diesel Fuel Update (EIA)

    Gulf of Mexico Proved Reserves and Production by Water Depth, 2009 1 Gulf of Mexico Proved Reserves and Production by Water Depth The Gulf of Mexico Federal Offshore region (GOM...

  19. Ocean General Circula-on near 1000 m depth

    E-Print Network [OSTI]

    Lherminier, Pascale

    currents near 1000 m depth · Eddy Kine-c Energy near 1000 m depth · Seasonal hemisphere), Kuroshio, Oyashio, East Kamchatka, Alaska Stream, Gulf Stream, Labrador, East and West Greenland (northern hemisphere). · Alternate zonal bands

  20. Precipitation Characteristics in Eighteen Coupled Climate Models National Center for Atmospheric Research,* Boulder, Colorado

    E-Print Network [OSTI]

    Dai, Aiguo

    Precipitation Characteristics in Eighteen Coupled Climate Models AIGUO DAI National Center) ABSTRACT Monthly and 3-hourly precipitation data from twentieth-century climate simulations by the newest-related variability, convective versus stratiform precipitation ratio, precipitation frequency and intensity

  1. Kirchhoff prestack depth migration in simple models of various anisotropy

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Kirchhoff prestack depth migration in simple models of various anisotropy V´aclav Bucha Department Republic, E-mail: bucha@seis.karlov.mff.cuni.cz Summary We apply the Kirchhoff prestack depth migration anisotropy and monoclinic anisotropy. We test Kirchhoff prestack depth migration in two ways: a

  2. Kirchhoff prestack depth migration in 3-D simple models

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Kirchhoff prestack depth migration in 3-D simple models: comparison of triclinic anisotropy depth migration to calculate migrated sections in 3-D simple anisotropic homogeneous velocity models interface. The anisotropy in the upper layer is triclinic. We apply Kirch- hoff prestack depth migration

  3. Methods Note/ Net Recharge vs. Depth to Groundwater

    E-Print Network [OSTI]

    Szilagyi, Jozsef

    Methods Note/ Net Recharge vs. Depth to Groundwater Relationship in the Platte River Valley rates were correlated with depth to groundwater (d) values in the wide alluvial valley of the Platte soils with a shallow groundwater table. The transition depth (dt) between negative and positive values

  4. Disordered amorphous calcium carbonate from direct precipitation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Farhadi Khouzani, Masoud; Chevrier, Daniel M.; Güttlein, Patricia; Hauser, Karin; Zhang, Peng; Hedin, Niklas; Gebauer, Denis

    2015-06-01

    Amorphous calcium carbonate (ACC) is known to play a prominent role in biomineralization. Different studies on the structure of biogenic ACCs have illustrated that they can have distinct short-range orders. However, the origin of so-called proto-structures in synthetic and additive-free ACCs is not well understood. In the current work, ACC has been synthesised in iso-propanolic media by direct precipitation from ionic precursors, and analysed utilising a range of different techniques. The data suggest that this additive-free type of ACC does not resemble clear proto-structural motifs relating to any crystalline polymorph. This can be explained by the undefined pH value inmore »iso-propanolic media, and the virtually instantaneous precipitation. Altogether, this work suggests that aqueous systems and pathways involving pre-nucleation clusters are required for the generation of clear proto-structural features in ACC. Experiments on the ACC-to-crystalline transformation in solution with and without ethanol highlight that polymorph selection is under kinetic control, while the presence of ethanol can control dissolution re-crystallisation pathways.« less

  5. PRECIPITATION The images above use daily precipitation statistics fromNWS COOP, CoCoRaHS, and CoAgMet

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    PRECIPITATION The images above use daily precipitation statistics fromNWS COOP, CoCoRaHS, and CoAgMet stations. Fromtop to bottom, and left to right: most recent 7-days of accumulated precipitation in inches; current month-to-date accumulated precipitation in inches; last month's precipitation as a percent

  6. Desert dust suppressing precipitation: A possible desertification feedback loop

    E-Print Network [OSTI]

    Daniel, Rosenfeld

    Desert dust suppressing precipitation: A possible desertification feedback loop Daniel Rosenfeld of land use exposing the topsoil can initiate such a desertification feedback process. Satellite

  7. Microbial Activity and Precipitation at Solution-Solution Mixing...

    Office of Scientific and Technical Information (OSTI)

    in a volumetrically significant space and to understand the physiological health of the cells that are responsible for the calcite precipitation. The specific...

  8. On the complex conductivity signatures of calcite precipitation

    SciTech Connect (OSTI)

    Wu, Yuxin; Hubbard, Susan; Williams, Kenneth Hurst; Ajo-Franklin, Jonathan

    2009-11-01

    Calcite is a mineral phase that frequently precipitates during subsurface remediation or geotechnical engineering processes. This precipitation can lead to changes in the overall behavior of the system, such as flow alternation and soil strengthening. Because induced calcite precipitation is typically quite variable in space and time, monitoring its distribution in the subsurface is a challenge. In this research, we conducted a laboratory column experiment to investigate the potential of complex conductivity as a mean to remotely monitor calcite precipitation. Calcite precipitation was induced in a glass bead (3 mm) packed column through abiotic mixing of CaCl{sub 2} and Na{sub 2}CO{sub 3} solutions. The experiment continued for 12 days with a constant precipitation rate of {approx}0.6 milimole/d. Visual observations and scanning electron microscopy imaging revealed two distinct phases of precipitation: an earlier phase dominated by well distributed, discrete precipitates and a later phase characterized by localized precipitate aggregation and associated pore clogging. Complex conductivity measurements exhibited polarization signals that were characteristic of both phases of calcite precipitation, with the precipitation volume and crystal size controlling the overall polarization magnitude and relaxation time constant. We attribute the observed responses to polarization at the electrical double layer surrounding calcite crystals. Our experiment illustrates the potential of electrical methods for characterizing the distribution and aggregation state of nonconductive minerals like calcite. Advancing our ability to quantify geochemical transformations using such noninvasive methods is expected to facilitate our understanding of complex processes associated with natural subsurface systems as well as processes induced through engineered treatments (such as environmental remediation and carbon sequestration).

  9. Bacterially induced precipitation of CaCO sub 3 : An example from studies of cyanobacterial mats

    SciTech Connect (OSTI)

    Chafetz, H.S.

    1990-04-30

    Bacteria induce the precipitation of calcium carbonate in the laboratory and in nature by altering their chemical environment. Geologists are recognizing the possibility that bacterially induced precipitates may form significant mineral deposits, unfortunately, there are currently no sound criteria by which they can be recognized in recent sediments, or in the rock record. Cultures of aerobic and facultative bacteria from cyanobacterial mats on Andros Island, Bahamas, and Baffin Bay, Texas, induced the precipitation of calcium carbonate under controlled conditions. Crusts, the largest features formed, are composed of 5--200{mu}m diameter bundles which are, in turn, composed of numerous individual crystals. The smallest observed features are 0.1--0.4{mu}m spheres and rods which comprise some individual crystals and crystal bundles. Crystal bundles resembling rhombohedra, tetragonal disphenoids, tetragonal dipyramids, and calcite dumbbells appear to be uniquely bacterial in origin, and they have all been observed in recent sediments. Swollen rods, discs, curved dumbbells, and 50--200{mu}m optically continuous crystals resembling brushes may be uniquely bacterial in origin, however, they have not been reported by other laboratories nor observed in natural settings. Presence of any of these forms in recent sediments should be taken as strong evidence for bacterial influence. Spheres and aragonite dumbbells have also been observed in natural environments, however, they are not always bacterial in origin. Precipitation of calcium carbonate occurs preferentially on dead cyanobacteria in the presence of bacteria. Lithification of algal mats to form stromatolites may take place in the zone of decaying organic matter due to bacterial activity.

  10. Control Systems Cyber Security: Defense in Depth Strategies ...

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

    Cyber Security: Defense in Depth Strategies More Documents & Publications Good Practice Guide on Firewall Deployment for SCADA and Process Control Networks Mitigations for...

  11. Bouguer gravity anomalies, depth to bedrock, and shallow temperature...

    Open Energy Info (EERE)

    Bouguer gravity anomalies, depth to bedrock, and shallow temperature in the Humboldt House geothermal area, Pershing County, Nevada Jump to: navigation, search OpenEI Reference...

  12. Asphaltene Precipitation in Crude Oils: Theory and Experiments

    E-Print Network [OSTI]

    Wu, Jianzhong

    Asphaltene Precipitation in Crude Oils: Theory and Experiments Eduardo Buenrostro.interscience.wiley.com). The precipitation of asphaltenes in two Mexican crude oils was measured using a combination of high- and tank-oil type of samples of the same crude oils. For the oils investigated, compositional data

  13. Predicting Nickel Precipitate Formation in Contaminated Soils. (3717)

    E-Print Network [OSTI]

    Sparks, Donald L.

    Predicting Nickel Precipitate Formation in Contaminated Soils. (3717) Authors: E. Peltier* - Univ in contaminated soils plays a crucial role in determining the long term fate of toxic metal pollutants speciation in laboratory contaminated soils with thermodynamic and kinetic analyses of precipitate stability

  14. Real Time Head Pose Estimation from Consumer Depth Cameras

    E-Print Network [OSTI]

    Wolberg, George

    for estimating location and orientation of a person's head, from depth data acquired by a low quality device. OurReal Time Head Pose Estimation from Consumer Depth Cameras Gabriele Fanelli1 , Thibaut Weise2 and the variance of the head position and orientation. We evaluate three different approaches to jointly take

  15. Instrument for Determining Depth of Dehydration of Frozen Fish

    E-Print Network [OSTI]

    . This report describes the design, construction, and operation of a de- hydration depth gauge to measure the degree of dehydration in frozen seafoods. Design The dehydration depth gauge adopts the principle was modified by using a heavier gauge blade having a narrow cutting edge extending I mm below the plane's flat

  16. Electrode immersion depth determination and control in electroslag remelting furnace

    DOE Patents [OSTI]

    Melgaard, David K. (Albuquerque, NM); Beaman, Joseph J. (Austin, TX); Shelmidine, Gregory J. (Tijeras, NM)

    2007-02-20

    An apparatus and method for controlling an electroslag remelting furnace comprising adjusting electrode drive speed by an amount proportional to a difference between a metric of electrode immersion and a set point, monitoring impedance or voltage, and calculating the metric of electrode immersion depth based upon a predetermined characterization of electrode immersion depth as a function of impedance or voltage.

  17. Imaging wave-penetrable objects in a finite depth ocean

    E-Print Network [OSTI]

    Zou, Jun

    Imaging wave-penetrable objects in a finite depth ocean Keji Liu Yongzhi Xu Jun Zou Abstract. We- penetrable inhomogeneous medium in a 3D finite depth ocean. The method is based on a scat- tering analysis extend the direct sampling method proposed in [13] to image a wave- penetrable inhomogeneous medium

  18. California Wintertime Precipitation in Regional and Global Climate Models

    SciTech Connect (OSTI)

    Caldwell, P M

    2009-04-27

    In this paper, wintertime precipitation from a variety of observational datasets, regional climate models (RCMs), and general circulation models (GCMs) is averaged over the state of California (CA) and compared. Several averaging methodologies are considered and all are found to give similar values when model grid spacing is less than 3{sup o}. This suggests that CA is a reasonable size for regional intercomparisons using modern GCMs. Results show that reanalysis-forced RCMs tend to significantly overpredict CA precipitation. This appears to be due mainly to overprediction of extreme events; RCM precipitation frequency is generally underpredicted. Overprediction is also reflected in wintertime precipitation variability, which tends to be too high for RCMs on both daily and interannual scales. Wintertime precipitation in most (but not all) GCMs is underestimated. This is in contrast to previous studies based on global blended gauge/satellite observations which are shown here to underestimate precipitation relative to higher-resolution gauge-only datasets. Several GCMs provide reasonable daily precipitation distributions, a trait which doesn't seem tied to model resolution. GCM daily and interannual variability is generally underpredicted.

  19. Optical detection dental disease using polarized light

    DOE Patents [OSTI]

    Everett, Matthew J. (Livermore, CA); Colston, Jr., Billy W. (Livermore, CA); Sathyam, Ujwal S. (Livermore, CA); Da Silva, Luiz B. (Danville, CA); Fried, Daniel (San Francisco, CA)

    2003-01-01

    A polarization sensitive optical imaging system is used to detect changes in polarization in dental tissues to aid the diagnosis of dental disease such as caries. The degree of depolarization is measured by illuminating the dental tissue with polarized light and measuring the polarization state of the backscattered light. The polarization state of this reflected light is analyzed using optical polarimetric imaging techniques. A hand-held fiber optic dental probe is used in vivo to direct the incident beam to the dental tissue and collect the reflected light. To provide depth-resolved characterization of the dental tissue, the polarization diagnostics may be incorporated into optical coherence domain reflectometry and optical coherence tomography (OCDR/OCT) systems, which enables identification of subsurface depolarization sites associated with demineralization of enamel or bone.

  20. 663 900 1000 1100 1200 3514 Annual precipitation (mm)

    E-Print Network [OSTI]

    Beckage, Brian

    663 900 1000 1100 1200 3514 Annual precipitation (mm) -72.6 -71.5 -70.3 -69.2 -68.1 42 precipitation (mm) -72.6 -71.5 -70.3 -69.2 -68.1 42.143.144.245.346.4 Longitude (degree) Latitude(degree) (b) Baseline (1961-1990) 663 900 1000 1100 1200 3514 Annual precipitation (mm) -72.6 -71.5 -70.3 -69.2 -68.1 42

  1. Effects of Irrigation on Great Plains and Midwest Precipitation Processes

    E-Print Network [OSTI]

    Huber, David Benjamin

    2010-11-18

    B. Huber, David B. Mechem, and Nathaniel A. Brunsell Outline •Historical and Conceptual Review •Description of Modeling Approach l•Resu ts •Conclusion Historical Changes in Precipitation Climatological Precipitation Differences (1971 – 2000 minus 1901 – 1930) Source: PRISM Climate Group Irrigation... moisture in the lower atmosphere increases Th id i ddhdb h l llj• e evapotranspirated water s advected northward y t e ow level et •Humid air is lifted over higher sensible heat areas by deep convective updrafts •Precipitation events become more intense •Moisture...

  2. Characterization of precipitation product errors across the United States using multiplicative triple collocation

    E-Print Network [OSTI]

    Stoffelen, A.

    Validation of precipitation estimates from various products is a challenging problem, since the true precipitation is unknown. However, with the increased availability of precipitation estimates from a wide range of ...

  3. Importance of wet precipitation as a removal and transport process for atmospheric water soluble carbonyls

    E-Print Network [OSTI]

    Matsunaga, SN; Guenther, AB; Izawa, Y; Wiedinmyer, C; Greenberg, JP; Kawamura, K

    2007-01-01

    et al. , 2001). Wet precipitation samples contain almost alldeposition rate due to the precipitation Yield mg C m 2 h 1Importance of wet precipitation as a removal and transport

  4. SPATIALLY PENALIZED REGRESSION FOR DEPENDENCE ANALYSIS OF RARE EVENTS: A STUDY IN PRECIPITATION EXTREMES

    E-Print Network [OSTI]

    Obradovic, Zoran

    SPATIALLY PENALIZED REGRESSION FOR DEPENDENCE ANALYSIS OF RARE EVENTS: A STUDY IN PRECIPITATION, USA ABSTRACT Discovery of dependence structure between precipitation extremes and other climate can be different for different locations. Secondly, the dependence structure between the precipitation

  5. Modelling precipitation sequences in power plant steels Part 2 -Application of kinetic theory

    E-Print Network [OSTI]

    Cambridge, University of

    Modelling precipitation sequences in power plant steels Part 2 - Application of kinetic theory J. D to predictthevastdifferencesin precipitation kineticsreportedin thepublishedliteraturefor powerplant steels.By implication, the precipitate phases usually present are metastable. Indeed,it is well establishedthat thereis

  6. Calcite precipitation dominates the electrical signatures of zero valent iron columns under simulated field conditions

    E-Print Network [OSTI]

    Wu, Yuxin

    2009-01-01

    S. , 1998. Reductive precipitation of uranium(VI) by zero-W. , 2003. Predicting the precipitation of mineral phases inT.M. , 1999. Mineral precipitation and porosity losses in

  7. MICROSTRUCTURE AND PROPERTIES OF A15 SUPERCONDUCTORS FORMED BY DIRECT PRECIPITATION

    E-Print Network [OSTI]

    Hong, M.

    2010-01-01

    early stage of the precipitation process. c C c S. Fooer, E.FORMED BT DIRECT PRECIPITATION M. Hong, D. R. D l e c d e ron the details of the precipitation process, which determine

  8. DIRECT SOLID-STATE PRECIPITATION PROCESSED A-15 (Nb3Al) SUPERCONDUCTING MATERIAL

    E-Print Network [OSTI]

    Hong, M.

    2010-01-01

    Letters DIRECT SOLID-STATE PRECIPITATION PROCESSED A-15 (Nb48 DIRECT SOLID-STATE PRECIPITATION PROCESSED A-IS (Nb Al)ABSTRACT A "solid~state precipitation" process was used to

  9. Population variation affects interactions between two California salt marsh plant species more than precipitation

    E-Print Network [OSTI]

    Noto, AE; Shurin, JB

    2015-01-01

    significant effect of precipitation and interaction betweenpresence but not by precipitation. J. carnosa plantsS) Competition (C) Precipitation (P) S × P S × C C  × P S × 

  10. Precipitation climatology over India: validation with observations and reanalysis datasets and spatial trends

    E-Print Network [OSTI]

    2015-01-01

    long-term daily gridded precipitation dataset for asia based10.1007/s00382-015-2597-y Precipitation climatology over DP (2012) Urban precipitation extremes: how reliable are

  11. Diurnal Precipitation Regimes in the Global Tropics* KAZUYOSHI KIKUCHI AND BIN WANG

    E-Print Network [OSTI]

    Wang, Bin

    Diurnal Precipitation Regimes in the Global Tropics* KAZUYOSHI KIKUCHI AND BIN WANG Department tropical precipitation are documented by using two complementary Tropical Rainfall Measuring Mission (TRMM, and phase propagation characteristics of the diurnal precipitation. The oceanic regime is characterized

  12. Combined effects of precipitation and nitrogen deposition on native and invasive winter annual production in California deserts

    E-Print Network [OSTI]

    Rao, Leela E.; Allen, Edith B.

    2010-01-01

    E R Combined eVects of precipitation and nitrogen depositionN deposition and precipitation regimes altered as aby November–December precipitation. Biomass exceeded the

  13. Precipitation over eastern South America and the South AtlanticSea surface temperature during neutral ENSO periods

    E-Print Network [OSTI]

    Jones, Charles

    2015-01-01

    2003) GPCP pentad precipitation analyses: an experimentalconvec- tion and increase precipitation over eastern SouthAmerica. Keywords SST Precipitation South Atlantic Dipole

  14. Response to comments by Yuan Wang on “Trends of extreme precipitation in Eastern China and their possible causes”

    E-Print Network [OSTI]

    2015-01-01

    dependence of global precipitation extremes. Geo- phys. Res.2015: Trends of extreme precipitation in eastern China andon convective clouds and precipitation. Rev. Geophys. , 50,

  15. Precipitation and soil impacts on partitioning of subsurface moisture in Avena barbata: Observations from a greenhouse experiment

    E-Print Network [OSTI]

    Salve, R.

    2011-01-01

    responsiveness to variation in precipitation and nitrogen is2007, , Intra-seasonal precipitation patterns and above-to Potential Changes in Precipitation, BioScience, 53: 941-

  16. Orogenic Propagating Precipitation Systems over the United States in a Global Climate Model with Embedded Explicit Convection

    E-Print Network [OSTI]

    Pritchard, Michael S; Moncrieff, Mitchell W; Somerville, Richard C. J

    2011-01-01

    with warm season precipitation epi- sodes. J. Atmos. Sci. ,2007: Con- vective precipitation variability as a tool forof the diurnal cycle of precipitation over the United States

  17. Effects on precipitation, clouds, and temperature from long-range transport of idealized aerosol plumes in WRF-Chem simulations

    E-Print Network [OSTI]

    Zhao, Zhan; Pritchard, Michael S; Russell, Lynn M

    2012-01-01

    on intense convective precipitation in the northeastern US,aerosols on regional precipitation over East Asia, J.of aerosols on surface precipitation from clouds: An attempt

  18. Seasonality of westerly moisture transport in the East Asian summer monsoon and its implications for interpreting precipitation ?18O

    E-Print Network [OSTI]

    2015-01-01

    origin of continental precipitation, Geophys. Res. Lett. ,Network of Isotopes in Precipitation, The GNIP Database.gauge-corrected, global precipitation, Int. J. Climatol. ,

  19. Fiber Optics

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

    said Todd Eckman, vice president of Information Management for MSA. "This new fiber optics will benefit DOE, Benton PUD and NoaNet (Northwest Open Access Network) users. This,...

  20. Exact analytical solutions of continuity equation for electron beams precipitating in Coulomb collisions

    SciTech Connect (OSTI)

    Dobranskis, R. R.; Zharkova, V. V., E-mail: valentina.zharkova@northumbria.ac.uk [Department of Mathematics and Information Sciences, University of Northumbria, Newcastle upon Tyne NE1 2XP (United Kingdom)

    2014-06-10

    The original continuity equation (CE) used for the interpretation of the power law energy spectra of beam electrons in flares was written and solved for an electron beam flux while ignoring an additional free term with an electron density. In order to remedy this omission, the original CE for electron flux, considering beam's energy losses in Coulomb collisions, was first differentiated by the two independent variables: depth and energy leading to partial differential equation for an electron beam density instead of flux with the additional free term. The analytical solution of this partial differential continuity equation (PDCE) is obtained by using the method of characteristics. This solution is further used to derive analytical expressions for mean electron spectra for Coulomb collisions and to carry out numeric calculations of hard X-ray (HXR) photon spectra for beams with different parameters. The solutions revealed a significant departure of electron densities at lower energies from the original results derived from the CE for the flux obtained for Coulomb collisions. This departure is caused by the additional exponential term that appeared in the updated solutions for electron differential density leading to its faster decrease at lower energies (below 100 keV) with every precipitation depth similar to the results obtained with numerical Fokker-Planck solutions. The effects of these updated solutions for electron densities on mean electron spectra and HXR photon spectra are also discussed.

  1. University of Oregon: GPS-based Precipitable Water Vapor (PWV)

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

    Vignola, F.; Andreas, A.

    2013-08-22

    A partnership with the University of Oregon and U.S. Department of Energy's National Renewable Energy Laboratory (NREL) to collect Precipitable Water Vapor (PWV) data to compliment existing resource assessment data collection by the university.

  2. Deformation mechanisms in a precipitation-strengthened ferritic...

    Office of Scientific and Technical Information (OSTI)

    by ordered (Ni,Fe)AlB2-type precipitates is a candidate material for ultra-supercritical steam turbine applications above 923 K. Despite earlier success in improving its...

  3. Short-term precipitation nowcasting for composite radar rainfall fields

    E-Print Network [OSTI]

    Van Horne, Matthew P. (Matthew Philip), 1980-

    2003-01-01

    Precipitation nowcasting at very short lead times is a difficult and important earth science goal. The implications of nowcasting extend into aviation, flood forecasting and other areas. Using correlation analysis for the ...

  4. Aerosol-Cloud interactions : a new perspective in precipitation enhancement

    E-Print Network [OSTI]

    Gunturu, Udaya Bhaskar

    2010-01-01

    Increased industrialization and human activity modified the atmospheric aerosol composition and size-distribution during the last several decades. This has affected the structure and evolution of clouds, and precipitation ...

  5. University of Oregon: GPS-based Precipitable Water Vapor (PWV)

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

    Vignola, F.; Andreas, A.

    A partnership with the University of Oregon and U.S. Department of Energy's National Renewable Energy Laboratory (NREL) to collect Precipitable Water Vapor (PWV) data to compliment existing resource assessment data collection by the university.

  6. Validation of an improved computer algorithm for precipitation echo classification 

    E-Print Network [OSTI]

    Amrhein, Edward Thomas

    2001-01-01

    A validation of an improved radar reflectivity partitioning scheme was performed using radar data collected for three separate precipitation systems in Central Texas. The improved algorithm was compared to a previously ...

  7. Tropical cyclone precipitation risk in the Southern United States

    E-Print Network [OSTI]

    Shedd, Sandra Michael

    2015-01-01

    This thesis works to evaluate the new rainfall algorithm that is used to simulate longterm tropical cyclone precipitation (TCP) climatology throughout the southeastern United States. The TCP climatology is based on a fleet ...

  8. Stochastic Simulation Methods for Precipitation and Streamflow Time Series 

    E-Print Network [OSTI]

    Li, Chao

    2013-04-30

    One major acknowledged challenge in daily precipitation is the inability to model extreme events in the spectrum of events. These extreme events are rare but may cause large losses. How to realistically simulate extreme ...

  9. Mesoscale predictability of an extreme warm-season precipitation event 

    E-Print Network [OSTI]

    Odins, Andrew Michael

    2005-02-17

    During the period of June 29 through July 6, 2002, an extreme precipitation event occurred over Texas, resulting in catastrophic flooding. Operational forecasts performed poorly, neither predicting the copious amounts of ...

  10. Precipitable water structure in tropical systems as estimated from TOVS 

    E-Print Network [OSTI]

    Hatfield, Eric

    1994-01-01

    The spatial and temporal structures of precipitable water (pW) in tropical systems are estimated using TIROS Operational Vertical Sounder (TOVS) radiances over ten cool seasons and two entire years. Statistical regression ...

  11. Stress map for ion irradiation: Depth-resolved dynamic competition between radiation-induced viscoelastic phenomena in SiO2

    E-Print Network [OSTI]

    Polman, Albert

    doping technology in integrated circuit manufacturing and is used to locally modify and tailor optical of the highly anisotropic ion-induced thermal spike, causes anisotropic strain that freezes in as the thermal or electronic energy loss (stopping), which are both highly depth dependent. In this letter we evaluate

  12. Precipitation kinetics in ultra-high lime softening 

    E-Print Network [OSTI]

    Peacock, Edward Dale

    1986-01-01

    PRECIPITATION KINETICS IN ULTRA-HIGH LIME SOFTENING A Thesis EDWARD DALE PEACOCK Submitted to the Graduate College of Texas ABM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August l986 Major... Subject: Civil Engineering PRECIPITATION KINETICS IN ULTRA-HIGH LIME SOFTENING A Thesis by EDWARD DALE PEACOCK Approved as to style and content by: Bill Batchelor (Chair of Commi e) T D. eynol s (Member) Michael T. Lo necker (Member) Donald Mc...

  13. An automatic control system for a laboratory precipitation process 

    E-Print Network [OSTI]

    Burnett, Mary Alice

    1986-01-01

    AN AUTOMATIC CONTROL SYSTEM FOR A LABORATORY PRECIPITATION PROCESS A Thesis by MARY ALICE BURNETT Submitted to the Graduate College of Texas A 8 M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May... 1986 Major Subject: Civil Engineering AN AUTOMATIC CONTROL SYSTEM FOR A LABORATORY PRECIPITATION PROCESS A Thesis MARY ALICE BURNETT Approved as to style and content by: Bill Batchelor (Chairman of Committee) Donald L. Reddell (Member) J...

  14. Inducing Mineral Precipitation in Groundwater by Addition of Phosphate

    SciTech Connect (OSTI)

    Karen E. Wright; Yoshiko Fujita; Thomas Hartmann; Mark Conrad

    2011-10-01

    Induced precipitation of phosphate minerals to scavenge trace metals and radionuclides from groundwater is a potential remediation approach for contaminated aquifers. Phosphate minerals can sequester trace elements by primary mineral formation, solid solution formation and/or adsorption, and they are poorly soluble under many environmental conditions, making them attractive for long-term sustainable remediation. The success of such engineered schemes will depend on the particular mineral phases generated, their rates of formation, and their long term stability. The purpose of this study was to examine the precipitation of calcium phosphate minerals under conditions representative of a natural groundwater. Because microorganisms are present in groundwater, and because some proposed schemes for induced phosphate mineral precipitation rely on the stimulation of native groundwater populations, we also tested the effect of bacterial cells (initial densities of 105 and 107 ml-1) within the precipitation medium. We also tested the effect of a trace mixture of propionic, isovaleric, formic and butyric acids (total concentration 0.035 mM). The experiments showed that the general progression of mineral precipitation was similar under all of the conditions, with initial formation of amorphous calcium carbonate, and transformation to poorly crystalline hydroxyapatite (HAP) by the end of the week-long experiments. The presence of the bacterial cells appeared to delay precipitation, although by the end of 7 days the overall extent of precipitation was similar for all of the treatments. The stoichiometry of the final precipitates as well as results of Rietveld refinement of x-ray diffraction data indicated that the treatments including organic acids and bacterial cells resulted in increased distortion of the HAP crystal lattice, with the higher concentration of cells resulting in the greatest distortion. Uptake of Sr into the phosphate minerals was decreased in the treatments with cells and organic acids, compared to the control. The results of the experiments enable a greater understanding of the challenges associated with phosphate-based remediation schemes for contaminated environments.

  15. DOE/SC-ARM/TR-129 Aerosol Optical Depth Value-Added Product

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalent Bonding Low-Cost2 DOE HQSiteo n n e v i2 ARM Climate16233752502489

  16. Aerosol Optical Depth Retrieval by Neural Networks Ensemble with Adaptive Cost Function

    E-Print Network [OSTI]

    Obradovic, Zoran

    and warming the atmosphere. Therefore, the accurate prediction of aerosols composition and their concentration (AERONET) is global remote sensing network of about 540 ground-based radiometers that retrieve AOD several as ground truth when validating retrieval quality of various satellite- based AOD retrieval algorithms [4

  17. The spatial and temporal variability of aerosol optical depths in the Mojave Desert of southern California

    E-Print Network [OSTI]

    Frank, Thomas D.

    California Thomas D. Frank a,, Larry Di Girolamo b,1 , Shannon Geegan a a Department of Geography, University of Illinois, 220 Davenport Hall, 607 S. Mathews Ave, Urbana, IL 61801, USA b Dept. of Atmospheric Sciences

  18. Aerosol Optical Depth Prediction from Satellite Observations by Multiple Instance Regression

    E-Print Network [OSTI]

    Obradovic, Zoran

    streams from multiple instruments. These instruments provide an unprecedented opportunity for long-term airborne particles that both reflect and absorb incoming solar radiation and whose effect on the Earth particles that reflect and absorb incoming solar radiation, on the global scale. The existing algorithms

  19. PREDICTING GROUND-BASED AEROSOL OPTICAL DEPTH WITH SATELLITE IMAGES VIA GAUSSIAN PROCESSES

    E-Print Network [OSTI]

    Obradovic, Zoran

    - formation is automatically determined. Experiments show that the spatio-temporal information contributes in the Earth's atmosphere, and have significant effects on human health (Baron, 2006) and climate changes incoming solar radiation. One of the biggest challenges of current climate research is to characterize

  20. Mars aerosol studies with the MGS TES emission phase function observations: Optical depths, particle

    E-Print Network [OSTI]

    Whitney, Barbara A.

    aerosol properties to date. TES solar band and infrared (IR) spectral EPF sequences are analyzed to obtain and scattering of radiation; 6225 Planetology: Solar System Objects: Mars; KEYWORDS: Martian atmosphere, aerosols, radiative forcing from atmo- spheric dust solar absorption and thermal emission was recognized as a primary

  1. Optical depth measurements by shadow-band radiometers and their uncertainties

    E-Print Network [OSTI]

    derived from Aerosol Robotic Net- work (AERONET) CIMEL tracking Sun photometer data to 0 is essentially the same: 0.01 in OD [3]. Like the tracking Sun photometers, shadow-band instruments have some important product of Sun-photometric measurements. [According to the American Meteoro- logical Society (AMS

  2. Analysis of Langley optical depth data, with aerosol and gas retrievals,

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B L O O D S TAPropaneandAn OverviewCoalAnalysisHeat Ratefor the

  3. Comparison of Cloud Top Height and Optical Depth Histograms from ISCCP,

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit the following commentsMethods for Estimating Short-Term Extremeposter,MISR,

  4. A Comparison of Cirrus Cloud Visible Optical Depth Derived from Lidar

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode Design to Improve Lithium-Ion Batteries Print Lithium-ion batteries arePlasmaARM

  5. ARM - Evaluation Product - MicroPulse LIDAR Cloud Optical Depth (MPLCOD)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Comments? WeDatastreamstps DocumentationAtlanticENA Contacts ENAProductsHSRL

  6. DOE/SC-ARM/TR-133 Aerosol Optical Depth Value-Added

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HAB Packet HanfordDOE ProjectREMOTE-HANDLED TRU764 The6552-013 ARM48923

  7. In-Depth Temperature Profiles in Pyrolyzing Wood 

    E-Print Network [OSTI]

    Reszka, Pedro

    The move towards performance-based design of the fire resistance of structures requires more accurate design methods. An important variable in the fire performance of timber structures is the in-depth temperature distribution, as wood is weakened...

  8. Method and apparatus to measure the depth of skin burns

    DOE Patents [OSTI]

    Dickey, Fred M. (Albuquerque, NM); Holswade, Scott C. (Albuquerque, NM)

    2002-01-01

    A new device for measuring the depth of surface tissue burns based on the rate at which the skin temperature responds to a sudden differential temperature stimulus. This technique can be performed without physical contact with the burned tissue. In one implementation, time-dependent surface temperature data is taken from subsequent frames of a video signal from an infrared-sensitive video camera. When a thermal transient is created, e.g., by turning off a heat lamp directed at the skin surface, the following time-dependent surface temperature data can be used to determine the skin burn depth. Imaging and non-imaging versions of this device can be implemented, thereby enabling laboratory-quality skin burn depth imagers for hospitals as well as hand-held skin burn depth sensors the size of a small pocket flashlight for field use and triage.

  9. Optical penetration sensor for pulsed laser welding

    DOE Patents [OSTI]

    Essien, Marcelino (Albuquerque, NM); Keicher, David M. (Albuquerque, NM); Schlienger, M. Eric (Albuquerque, NM); Jellison, James L. (Albuquerque, NM)

    2000-01-01

    An apparatus and method for determining the penetration of the weld pool created from pulsed laser welding and more particularly to an apparatus and method of utilizing an optical technique to monitor the weld vaporization plume velocity to determine the depth of penetration. A light source directs a beam through a vaporization plume above a weld pool, wherein the plume changes the intensity of the beam, allowing determination of the velocity of the plume. From the velocity of the plume, the depth of the weld is determined.

  10. Case depth verification of hardened samples with Barkhausen noise sweeps

    SciTech Connect (OSTI)

    Santa-aho, Suvi; Vippola, Minnamari; Lepistö, Toivo [Tampere University of Technology, Department of Materials Science, P.O. Box 589, 33101 Tampere (Finland); Hakanen, Merja [Stresstech Oy, Tikkutehtaantie 1, 40800 Vaajakoski (Finland); Sorsa, Aki; Leiviskä, Kauko [University of Oulu, Control Engineering Laboratory, P.O. Box 4300, FIN-90014 University of Oulu (Finland)

    2014-02-18

    An interesting topic of recent Barkhausen noise (BN) method studies is the application of the method to case depth evaluation of hardened components. The utilization of BN method for this purpose is based on the difference in the magnetic properties between the hardened case and the soft core. Thus, the detection of case depth with BN can be achieved. The measurements typically have been carried out by using low magnetizing frequencies which have deeper penetration to the ferromagnetic samples than the conventional BN measurement. However, the penetration depth is limited due to eddy current damping of the signal. We introduce here a newly found sweep measurement concept for the case depth evaluation. In this study sweep measurements were carried out with various magnetizing frequencies and magnetizing voltages to detect the effect of different frequency and voltage and their correspondence to the actual case depth values verified from destructive characterization. Also a BN measurement device that has an implemented sweep analysis option was utilised. The samples were either induction or case-hardened samples and sample geometry contained both rod samples and gear axle samples with different case depth values. Samples were also further characterized with Xray diffraction to study the residual stress state of the surface. The detailed data processing revealed that also other calculated features than the maximum slope division of the 1st derivative of the BN signal could hold the information about the case depth value of the samples. The sweep method was able to arrange the axles into correct order according to the case depth value even though the axles were used.

  11. Optical coupler

    DOE Patents [OSTI]

    Majewski, Stanislaw; Weisenberger, Andrew G.

    2004-06-15

    In a camera or similar radiation sensitive device comprising a pixilated scintillation layer, a light guide and an array of position sensitive photomultiplier tubes, wherein there exists so-called dead space between adjacent photomultiplier tubes the improvement comprising a two part light guide comprising a first planar light spreading layer or portion having a first surface that addresses the scintillation layer and optically coupled thereto at a second surface that addresses the photomultiplier tubes, a second layer or portion comprising an array of trapezoidal light collectors defining gaps that span said dead space and are individually optically coupled to individual position sensitive photomultiplier tubes. According to a preferred embodiment, coupling of the trapezoidal light collectors to the position sensitive photomultiplier tubes is accomplished using an optical grease having about the same refractive index as the material of construction of the two part light guide.

  12. Optical memory

    DOE Patents [OSTI]

    Mao, Samuel S; Zhang, Yanfeng

    2013-07-02

    Optical memory comprising: a semiconductor wire, a first electrode, a second electrode, a light source, a means for producing a first voltage at the first electrode, a means for producing a second voltage at the second electrode, and a means for determining the presence of an electrical voltage across the first electrode and the second electrode exceeding a predefined voltage. The first voltage, preferably less than 0 volts, different from said second voltage. The semiconductor wire is optically transparent and has a bandgap less than the energy produced by the light source. The light source is optically connected to the semiconductor wire. The first electrode and the second electrode are electrically insulated from each other and said semiconductor wire.

  13. Optical analyzer

    DOE Patents [OSTI]

    Hansen, A.D.

    1987-09-28

    An optical analyzer wherein a sample of particulate matter, and particularly of organic matter, which has been collected on a quartz fiber filter is placed in a combustion tube, and light from a light source is passed through the sample. The temperature of the sample is raised at a controlled rate and in a controlled atmosphere. The magnitude of the transmission of light through the sample is detected as the temperature is raised. A data processor, differentiator and a two pen recorder provide a chart of the optical transmission versus temperature and the rate of change of optical transmission versus temperature signatures (T and D) of the sample. These signatures provide information as to physical and chemical processes and a variety of quantitative and qualitative information about the sample. Additional information is obtained by repeating the run in different atmospheres and/or different rates or heating with other samples of the same particulate material collected on other filters. 7 figs.

  14. General Technical Report PSW-GTR-243 Relationship Between Precipitation and Tree

    E-Print Network [OSTI]

    General Technical Report PSW-GTR-243 148 Relationship Between Precipitation and Tree Mortality to precipitation. Many environmental factors influence the severity of disease epidemics. Precipitation data from Humboldt County. Higher levels of precipitation during the 2 years prior to observed mortality appeared

  15. PRECIPITATION HARDENING IN ALUMINUM ALLOY 6022 W.F. Miao and D.E. Laughlin

    E-Print Network [OSTI]

    Laughlin, David E.

    PRECIPITATION HARDENING IN ALUMINUM ALLOY 6022 W.F. Miao and D.E. Laughlin Department of Materials on a precipitation hardening process. The precipitation sequence in the Al-Mg-Si alloys is generally accepted [1-shaped precipitates (circular cross sections) along 100 Al, having a hexagonal crystal structure with a 0.705 nm and c

  16. New conjunctive CubeSat and balloon measurements to quantify rapid energetic electron precipitation

    E-Print Network [OSTI]

    Li, Xinlin

    New conjunctive CubeSat and balloon measurements to quantify rapid energetic electron precipitation precipitation into the atmosphere can contribute significant losses to the outer radiation belt. In particular, rapid narrow precipitation features termed precipitation bands have been hypothesized to be an integral

  17. PHYSICAL REVIEW E 88, 022141 (2013) Helices in the wake of precipitation fronts

    E-Print Network [OSTI]

    Rácz, Zoltán

    2013-01-01

    PHYSICAL REVIEW E 88, 022141 (2013) Helices in the wake of precipitation fronts Shibi Thomas,1 of the emergence of helices in the wake of precipitation fronts is presented. The precipitation dynamics studies [7,8] in which helical precipitation patterns were observed in the wake of moving reaction

  18. Characterization of extreme precipitation within atmospheric river events over California

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Jeon, S.; Prabhat,; Byna, S.; Gu, J.; Collins, W. D.; Wehner, M. F.

    2015-11-17

    Atmospheric rivers (ARs) are large, spatially coherent weather systems with high concentrations of elevated water vapor. These systems often cause severe downpours and flooding over the western coastal United States – and with the availability of more atmospheric moisture in the future under global warming we expect ARs to play an important role as potential causes of extreme precipitation changes. Therefore, we aim to investigate changes in extreme precipitation properties correlated with AR events in a warmer climate, which are large-scale meteorological patterns affecting the weather and climate of California. We have recently developed the TECA (Toolkit for Extrememore »Climate Analysis) software for automatically identifying and tracking features in climate data sets. Specifically, we can now identify ARs that make landfall on the western coast of North America. Based on this detection procedure, we can investigate the impact of ARs by exploring the spatial extent of AR precipitation using climate model (CMIP5) simulations and characterize spatial patterns of dependence for future projections between AR precipitation extremes under climate change within the statistical framework. Our results show that AR events in the future RCP (Representative Concentration Pathway)8.5 scenario (2076–2100) tend to produce heavier rainfall with higher frequency and longer days than events from the historical run (1981–2005). We also find that the dependence between extreme precipitation events has a shorter spatial range, within localized areas in California, under the high future emissions scenario than under the historical run.« less

  19. Measuring depth profiles of residual stress with Raman spectroscopy

    SciTech Connect (OSTI)

    Enloe, W.S.; Sparks, R.G.; Paesler, M.A.

    1988-12-01

    Knowledge of the variation of residual stress is a very important factor in understanding the properties of machined surfaces. The nature of the residual stress can determine a part`s susceptibility to wear deformation, and cracking. Raman spectroscopy is known to be a very useful technique for measuring residual stress in many materials. These measurements are routinely made with a lateral resolution of 1{mu}m and an accuracy of 0.1 kbar. The variation of stress with depth; however, has not received much attention in the past. A novel technique has been developed that allows quantitative measurement of the variation of the residual stress with depth with an accuracy of 10nm in the z direction. Qualitative techniques for determining whether the stress is varying with depth are presented. It is also demonstrated that when the stress is changing over the volume sampled, errors can be introduced if the variation of the stress with depth is ignored. Computer aided data analysis is used to determine the depth dependence of the residual stress.

  20. Sandia Energy - Quantum Optics

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

    Quantum Optics Home Energy Research EFRCs Solid-State Lighting Science EFRC Quantum Optics Quantum OpticsTara Camacho-Lopez2015-03-30T16:37:03+00:00 Quantum Optics with a Single...

  1. On the El Nino Teleconnection to Spring Precipitation in Europe

    E-Print Network [OSTI]

    Van Oldenborgh, G J; Tank, A K; Oldenborgh, Geert Jan van; Burgers, Gerrit; Tank, Albert Klein

    1998-01-01

    In a statistical analysis of more than a century of data we find a strong connection between strong warm El Nino winter events and high spring precipitation in a band from Southern England eastwards into Asia. This relationship is an extension of the connection mentioned by Kiladis and Diaz (1989), and much stronger than the winter season teleconnection that has been the subject of other studies. Linear correlation coefficients between DJF NINO3 indices and MAM precipitation are higher than r=0.3 for individual stations, and as high as r=0.49 for an index of precipitation anomalies around 50N from 5W to 35E. The lagged correlation suggests that south-east Asian surface temperature anomalies may act as intermediate variables.

  2. Laboratory-scale evaluations of alternative plutonium precipitation methods

    SciTech Connect (OSTI)

    Martella, L.L.; Saba, M.T.; Campbell, G.K.

    1984-02-08

    Plutonium(III), (IV), and (VI) carbonate; plutonium(III) fluoride; plutonium(III) and (IV) oxalate; and plutonium(IV) and (VI) hydroxide precipitation methods were evaluated for conversion of plutonium nitrate anion-exchange eluate to a solid, and compared with the current plutonium peroxide precipitation method used at Rocky Flats. Plutonium(III) and (IV) oxalate, plutonium(III) fluoride, and plutonium(IV) hydroxide precipitations were the most effective of the alternative conversion methods tested because of the larger particle-size formation, faster filtration rates, and the low plutonium loss to the filtrate. These were found to be as efficient as, and in some cases more efficient than, the peroxide method. 18 references, 14 figures, 3 tables.

  3. Depth-resolved confocal micro-Raman spectroscopy for characterizing GaN-based light emitting diode structures

    SciTech Connect (OSTI)

    Chen, Wei-Liang; Lee, Yu-Yang; Chang, Yu-Ming, E-mail: ymchang@ntu.edu.tw [Center for Condensed Matter Sciences, National Taiwan University, 10617 Taipei, Taiwan (China)] [Center for Condensed Matter Sciences, National Taiwan University, 10617 Taipei, Taiwan (China); Chang, Chiao-Yun; Huang, Huei-Min; Lu, Tien-Chang [Department of Photonics, National Chiao Tung University, 30010 Hsinchu, Taiwan (China)] [Department of Photonics, National Chiao Tung University, 30010 Hsinchu, Taiwan (China)

    2013-11-15

    In this work, we demonstrate that depth-resolved confocal micro-Raman spectroscopy can be used to characterize the active layer of GaN-based LEDs. By taking the depth compression effect due to refraction index mismatch into account, the axial profiles of Raman peak intensities from the GaN capping layer toward the sapphire substrate can correctly match the LED structural dimension and allow the identification of unique Raman feature originated from the 0.3 ?m thick active layer of the studied LED. The strain variation in different sample depths can also be quantified by measuring the Raman shift of GaN A{sub 1}(LO) and E{sub 2}(high) phonon peaks. The capability of identifying the phonon structure of buried LED active layer and depth-resolving the strain distribution of LED structure makes this technique a potential optical and remote tool for in operando investigation of the electronic and structural properties of nitride-based LEDs.

  4. Parallel optical sampler

    DOE Patents [OSTI]

    Tauke-Pedretti, Anna; Skogen, Erik J; Vawter, Gregory A

    2014-05-20

    An optical sampler includes a first and second 1.times.n optical beam splitters splitting an input optical sampling signal and an optical analog input signal into n parallel channels, respectively, a plurality of optical delay elements providing n parallel delayed input optical sampling signals, n photodiodes converting the n parallel optical analog input signals into n respective electrical output signals, and n optical modulators modulating the input optical sampling signal or the optical analog input signal by the respective electrical output signals, and providing n successive optical samples of the optical analog input signal. A plurality of output photodiodes and eADCs convert the n successive optical samples to n successive digital samples. The optical modulator may be a photodiode interconnected Mach-Zehnder Modulator. A method of sampling the optical analog input signal is disclosed.

  5. Noise Analysis and Synthesis for 3D Laser Depth Scanners

    E-Print Network [OSTI]

    Martin, Ralph R.

    Noise Analysis and Synthesis for 3D Laser Depth Scanners Xianfang Sun a,b,, Paul L. Rosin a , Ralph the noise present in range data measured by a Konica Minolta Vivid 910 scanner, in order to better characterise real scanner noise. Methods for denoising 3D mesh data have often assumed the noise to be Gaussian

  6. Continuous Snow Depth, Intensive Site 1, Barrow, Alaska

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

    Bob Busey; Larry Hinzman; Vladimir Romanovsky; William Cable

    Continuous Snow depth data are being collected at several points within four intensive study areas in Barrow, Alaska. These data are being collected to better understand the energy dynamics above the active layer and permafrost. They complement in-situ snow and soil measurements at this location. The data could also be used as supporting measurements for other research and modeling activities.

  7. Electrical Resistivity Imaging for Unknown Bridge Foundation Depth Determination 

    E-Print Network [OSTI]

    Arjwech, Rungroj

    2012-02-14

    as suitable to investigate unknown bridge foundations. The objective of the present study is to apply advanced 2D electrical resistivity imaging (ERI) in order to identify depth of unknown bridge foundations. A survey procedure is carried out in mixed terrain...

  8. Depth Energy Image for Gait Symmetry Quantification Caroline Rougier1

    E-Print Network [OSTI]

    Mignotte, Max

    Depth Energy Image for Gait Symmetry Quantification Caroline Rougier1 , Edouard Auvinet1 , Jean´erationnelle, Universit´e de Montr´eal, Canada {rougierc, auvinet, meunier, mignotte}@iro.umontreal.ca 2 Centre de recherche du Centre Hospitalier de l'Universit´e de Montr´eal, ETS, Canada jacques

  9. Wave-current interaction in water of finite depth

    E-Print Network [OSTI]

    Huang, Zhenhua, 1967-

    2004-01-01

    In this thesis, the nonlinear interaction of waves and current in water of finite depth is studied. Wind is not included. In the first part, a 2D theory for the wave effect on a turbulent current over rough or smooth bottom ...

  10. Continuous Snow Depth, Intensive Site 1, Barrow, Alaska

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

    Bob Busey; Larry Hinzman; Vladimir Romanovsky; William Cable

    2014-11-06

    Continuous Snow depth data are being collected at several points within four intensive study areas in Barrow, Alaska. These data are being collected to better understand the energy dynamics above the active layer and permafrost. They complement in-situ snow and soil measurements at this location. The data could also be used as supporting measurements for other research and modeling activities.

  11. Lower Bounds on Interactive Compressibility by Constant-Depth Circuits

    E-Print Network [OSTI]

    Edinburgh, University of

    Lower Bounds on Interactive Compressibility by Constant-Depth Circuits Arkadev Chattopadhyay to prove the first lower bounds on general probabilistic multi-round instance compression. We show, and strengthens results of Dubrov and Ishai [DI06]. We also show that a similar lower bound holds for Majority. We

  12. 7 Predictive Risk Mapping of Water Table Depths in

    E-Print Network [OSTI]

    Camara, Gilberto

    73 7 Predictive Risk Mapping of Water Table Depths in a Brazilian Cerrado Area R. L. Manzione, M extend from the northern margins of the Amazon rain for- ests to outliers on the southern borders metabolize throughout the year, drawing on soil water reserves, and can withstand short-lived fires. contents

  13. Dual-depth adapted irreducible formal multizeta values Leila Schneps

    E-Print Network [OSTI]

    Schneps, Leila

    , and the relations between them. Consider the following diagram, in which the four top spaces are Hopf algebras the double shuffle Lie algebra, equipped with the standard weight grading and depth filtration; we write ds = n3dsn and denote the filtration by ds1 ds2 · · ·. The double shuffle Lie algebra is dual

  14. Optical Tweezers Physics 464 Applied Optics,

    E-Print Network [OSTI]

    Optical Tweezers Physics 464 ­ Applied Optics, By Scott Cline #12;Project Topics · Brief history · Typical set-up · How they work · Common use #12;Discovery · Effects of optical scattering and gradient forces discovered by Arthur Ashkin 1970 · Method of creating an "optical trap" established in 1986

  15. Optical Packet Switching -1 Optical Networks

    E-Print Network [OSTI]

    Mellia, Marco

    Optical Packet Switching - 1 Optical Networks: from fiber transmission to photonic switching Optical Packet Switching Fabio Neri and Marco Mellia TLC Networks Group ­ Electronics Department e.mellia@polito.it ­ tel. 011 564 4173 #12;Optical Packet Switching - 2 · This work is licensed under the Creative Commons

  16. The Nature of Zn Precipitates Formed in the Presence of

    E-Print Network [OSTI]

    Sparks, Donald L.

    D D O N A L D L . S P A R K S Department of Plant and Soil Sciences, University of Delaware, NewarkThe Nature of Zn Precipitates Formed in the Presence of Pyrophyllite R O B E R T G . F O R D * A N

  17. The Environment of Precipitating Shallow Cumulus LOUISE NUIJENS

    E-Print Network [OSTI]

    Haak, Hein

    of precipitation are presented from two months of radar reflectiv- ity data, collected by the ground-based SPol%. These estimates are based on subsets of TRMM data for which the majority of radar echoes (that span at least 750 m. of Atmospheric and Oceanic Sciences, University of California Los Angeles, CA, USA A.PIER SIEBESMA Royal

  18. VICARIOUS CALIBRATION OF GLOBAL PRECIPITATION MEASUREMENT MICROWAVE RADIOMETERS1

    E-Print Network [OSTI]

    Ruf, Christopher

    VICARIOUS CALIBRATION OF GLOBAL PRECIPITATION MEASUREMENT MICROWAVE RADIOMETERS1 Darren Mc of the TMI, WindSat, SSM/I F13 and SSM/I F14 microwave radiometers using data from the GPM Inter Terms-- Microwave radiometry, Calibration 1. INTRODUCTION The primary goal of NASA's Global

  19. National Aeronautics and Space Administration Global Precipitation Measurement

    E-Print Network [OSTI]

    Waliser, Duane E.

    cycle describes how water evaporates from Earth's surfaces, rises into the atmosphere, cools-- continuously circulates through one of Earth's most powerful systems: the water cycle. Water flows endlessly, melting, evaporation, sublimation and deposition. By measuring the profile of precipitation as it falls

  20. Reduction of tropical land region precipitation variability via transpiration

    E-Print Network [OSTI]

    Gentine, Pierre

    plants through open stomata: this process (transpiration) cools the plant and facilitates transportReduction of tropical land region precipitation variability via transpiration Jung-Eun Lee,1 in observations and models. In the present study, the potential role of transpiration for this difference

  1. Preparation of Lead Zirconate by Homogeneous Precipitation and Calcination

    E-Print Network [OSTI]

    Tas, A. Cuneyt

    University, Ankara 06531, Turkey Antiferroelectric PbZrO3 has been synthesized by homoge- neous precipitation (Merck, Darmstadt, Germany), whereas the zirconium source was 99% pure ZrCl4 (Merck, Darmstadt, Germany stock solutions. Reagent-grade urea (CH4N2O, 99.5% Riedel-De Haen AG, Germany) was used as the precip

  2. Bacterially induced precipitation of CaCO{sub 3}: An example from studies of cyanobacterial mats. Final report

    SciTech Connect (OSTI)

    Chafetz, H.S.

    1990-04-30

    Bacteria induce the precipitation of calcium carbonate in the laboratory and in nature by altering their chemical environment. Geologists are recognizing the possibility that bacterially induced precipitates may form significant mineral deposits, unfortunately, there are currently no sound criteria by which they can be recognized in recent sediments, or in the rock record. Cultures of aerobic and facultative bacteria from cyanobacterial mats on Andros Island, Bahamas, and Baffin Bay, Texas, induced the precipitation of calcium carbonate under controlled conditions. Crusts, the largest features formed, are composed of 5--200{mu}m diameter bundles which are, in turn, composed of numerous individual crystals. The smallest observed features are 0.1--0.4{mu}m spheres and rods which comprise some individual crystals and crystal bundles. Crystal bundles resembling rhombohedra, tetragonal disphenoids, tetragonal dipyramids, and calcite dumbbells appear to be uniquely bacterial in origin, and they have all been observed in recent sediments. Swollen rods, discs, curved dumbbells, and 50--200{mu}m optically continuous crystals resembling brushes may be uniquely bacterial in origin, however, they have not been reported by other laboratories nor observed in natural settings. Presence of any of these forms in recent sediments should be taken as strong evidence for bacterial influence. Spheres and aragonite dumbbells have also been observed in natural environments, however, they are not always bacterial in origin. Precipitation of calcium carbonate occurs preferentially on dead cyanobacteria in the presence of bacteria. Lithification of algal mats to form stromatolites may take place in the zone of decaying organic matter due to bacterial activity.

  3. Optics and Optical Engineering Program Assessment Plan Program Learning Objectives

    E-Print Network [OSTI]

    Cantlon, Jessica F.

    Optics and Optical Engineering Program Assessment Plan Program Learning, and processes that underlie optics and optical engineering. 2. Strong understanding of the fundamental science, mathematics, and processes that underlie optics and optical

  4. Effects of alteration product precipitation on glass dissolution

    SciTech Connect (OSTI)

    Strachan, Denis M.; Neeway, James J.

    2014-04-02

    Silicate glasses dissolve in water at a rate dependent on the solution concentration of orthosilicic acid (H4SiO4). In general, higher [H4SiO4] leads to lower dissolution rates. It has often been observed that the precipitation of certain silica-bearing alteration products can cause the dissolution of the glass to increase, even after the rate has decreased significantly. However, it has also been observed that in the concentrations of these silica-bearing solution species do not significantly decrease while other elements continue to be released. In this study, we have used the Geochemist’s Workbench code to investigate the relationship between glass dissolution rates and the precipitation rate of a silica-bearing alteration product, analcime (Na(AlSi2O6)?H2O). In this initial study and to simplify the calculations, we suppressed all alteration products except analcime, gibbsite (Al(OH)3), and amorphous silica. The ‘cross affinity’ code option allowed us to account for the fact that glass is a thermodynamically unstable solid with respect to its alteration products in contact with water. The cross-affinity option in the Geochemist’s Workbench geochemical code allowed us to substitute the amorphous silica equilibrium-constant matrix for the glass equilibrium-constant matrix. In this article, we present the results of our calculations of the glass dissolution rate at different values for the analcime precipitation rate constant and the effects of varying the glass dissolution rate constant at a constant analcime precipitation rate constant. In all cases, our results indicate that the glass dissolution rate controls the rate of analcime precipitation in the long term. Our results, compared in general terms with experiments, show the importance of the gel layer that forms during glass alteration. The meaning of these results pertinent to long-term glass durability is discussed.

  5. Precipitation in 18 wt% Ni maraging steel of grade 350

    SciTech Connect (OSTI)

    Tewari, R.; Mazumder, S.; Batra, I.S.; Dey, G.K.; Banerjee, S.

    2000-03-14

    The evolution of precipitates in maraging steel of grade 350 was studied using the complementary techniques of small angle X-ray scattering (SACS) and transmission electron microscopy (TEM). These investigations revealed that ageing the steel at 703 K involved a rhombohedral distortion of the supersaturated b.c.c. martensite accompanied by the appearance of diffuse {omega}-like structures. This was followed by the appearance of well-defined {omega} particles containing chemical order. At the ageing temperature of 783 K, Ni{sub 3}(Ti,Mo) precipitates were the first to appear with a growth exponent of 1/3. The values of the Pored exponent obtained from the SAXS profiles indicated that the {omega} particles, formed below 723 K, had diffuse interfaces up to an ageing time of 48 h. On the other hand, Ni{sub 3}(Ti,Mo) precipitates, formed above 723 K, developed sharp interfaces in just about an hour. Also, the steel exhibited scaling in phase separation both at 703 and 783 K, but only during the early stages. Through this study it was established that at temperatures of ageing less than 723 K, evolution of {omega} particles takes place through the collapse of the unstable b.c.c. lattice and, at temperatures above 723 K, precipitation of A{sub 3}B type of phases through the mechanism of clustering and ordering of atomic species. Sharp interfaces develop rather quickly when the mechanism of precipitation involves development and amplification of a concentration wave along as in the nucleation of Ni{sub 3}(Ti,Mo) at 783 K than when an interplay of both the displacement and concentration waves is required as in the evolution of {omega} at 703 K. These results indicate towards the possibility of existence of two separate time-temperature-transformation (TTT) curves, one for the evolution of {omega}-phase and another for nucleation and growth of Ni{sub 3}(Ti,Mo).

  6. Optical microphone

    DOE Patents [OSTI]

    Veligdan, James T. (Manorville, NY)

    2000-01-11

    An optical microphone includes a laser and beam splitter cooperating therewith for splitting a laser beam into a reference beam and a signal beam. A reflecting sensor receives the signal beam and reflects it in a plurality of reflections through sound pressure waves. A photodetector receives both the reference beam and reflected signal beam for heterodyning thereof to produce an acoustic signal for the sound waves. The sound waves vary the local refractive index in the path of the signal beam which experiences a Doppler frequency shift directly analogous with the sound waves.

  7. Optical microfluidics

    SciTech Connect (OSTI)

    Kotz, K.T.; Noble, K.A.; Faris, G.W. [Molecular Physics Laboratory, SRI International, 333 Ravenswood Avenue, Menlo Park, California 94025 (United States)

    2004-09-27

    We present a method for the control of small droplets based on the thermal Marangoni effect using laser heating. With this approach, droplets covering five orders of magnitude in volume ({approx}1.7 {mu}L to 14 pL), immersed in decanol, were moved on an unmodified polystyrene surface, with speeds of up to 3 mm/s. When two droplets were brought into contact, they spontaneously fused and rapidly mixed in less than 33 ms. This optically addressed microfluidic approach has many advantages for microfluidic transport, including exceptional reconfigurability, low intersample contamination, large volume range, extremely simple substrates, no electrical connections, and ready scaling to large arrays.

  8. Optical devices

    DOE Patents [OSTI]

    Chaves, Julio C.; Falicoff, Waqidi; Minano, Juan C.; Benitez, Pablo; Dross, Oliver; Parkyn, Jr., William A.

    2010-07-13

    An optical manifold for efficiently combining a plurality of blue LED outputs to illuminate a phosphor for a single, substantially homogeneous output, in a small, cost-effective package. Embodiments are disclosed that use a single or multiple LEDs and a remote phosphor, and an intermediate wavelength-selective filter arranged so that backscattered photoluminescence is recycled to boost the luminance and flux of the output aperture. A further aperture mask is used to boost phosphor luminance with only modest loss of luminosity. Alternative non-recycling embodiments provide blue and yellow light in collimated beams, either separately or combined into white.

  9. Optical storage with electromagnetically induced transparency in a dense cold atomic ensemble

    E-Print Network [OSTI]

    Du, Shengwang

    Optical storage with electromagnetically induced transparency in a dense cold atomic ensemble storage with electromagnetically induced transparency in a dense cold 85 Rb atomic ensemble. By varying the optical depth (OD) from 0 to 140, we observe that the optimal storage effi- ciency has a saturation value

  10. Infrared cloud imaging in support of Earth-space optical communication

    E-Print Network [OSTI]

    Shaw, Joseph A.

    Infrared cloud imaging in support of Earth- space optical communication Paul W. Nugent,1 Joseph A to the communication platform, so there is a need to measure spatial and temporal statistics of clouds at potential to provide continuous day-night cloud detection and classification according to the cloud optical depth

  11. Optical sedimentation recorder

    DOE Patents [OSTI]

    Bishop, James K.B.

    2014-05-06

    A robotic optical sedimentation recorder is described for the recordation of carbon flux in the oceans wherein both POC and PIC particles are captured at the open end of a submersible sampling platform, the captured particles allowed to drift down onto a collection plate where they can be imaged over time. The particles are imaged using three separate light sources, activated in sequence, one source being a back light, a second source being a side light to provide dark field illumination, and a third source comprising a cross polarized light source to illuminate birefringent particles. The recorder in one embodiment is attached to a buoyancy unit which is capable upon command for bringing the sedimentation recorder to a programmed depth below the ocean surface during recordation mode, and on command returning the unit to the ocean surface for transmission of recorded data and receipt of new instructions. The combined unit is provided with its own power source and is designed to operate autonomously in the ocean for extended periods of time.

  12. 350-?m side-view optical probe for imaging the murine brain in vivo from the cortex to the hypothalamus

    E-Print Network [OSTI]

    Kim, Jun Ki

    Miniature endoscopic probes offer a solution for deep brain imaging by overcoming the limited depth of intravital microscopy. We describe a small-diameter (350 ?m) graded-index optical probe with a side-view design for in ...

  13. RFID tag modification for full depth backscatter modulation

    DOE Patents [OSTI]

    Scott, Jeffrey Wayne [Pasco, WA; Pratt, Richard M [Richland, WA

    2010-07-20

    A modulated backscatter radio frequency identification device includes a diode detector configured to selectively modulate a reply signal onto an incoming continuous wave; communications circuitry configured to provide a modulation control signal to the diode detector, the diode detector being configured to modulate the reply signal in response to be modulation control signal; and circuitry configured to increase impedance change at the diode detector which would otherwise not occur because the diode detector rectifies the incoming continuous wave while modulating the reply signal, whereby reducing the rectified signal increases modulation depth by removing the reverse bias effects on impedance changes. Methods of improving depth of modulation in a modulated backscatter radio frequency identification device are also provided.

  14. Analysis of Proper Depth for Gaining Seawater Heat

    E-Print Network [OSTI]

    and seawater temperatures near the city. · It is impossible to get deep sea water for Busan area, since according to the season, while that of deep sea water is constant. Point 1 207 Area 0.00 5.00 10.00 15.00 20 the maximum sea water depth around Busan is about 150m. · It will be a good option to use surface layer water

  15. A depth-derived Pleistocene age model: Uncertainty estimates, sedimentation variability, and nonlinear climate change

    E-Print Network [OSTI]

    Wunsch, Carl

    A depth-derived Pleistocene age model: Uncertainty estimates, sedimentation variability. To avoid biasing this ``depth-derived'' age estimate, the depth scale is first corrected for the effects sediment accumulation rates are estimated and modeled as an autocorrelated stochastic process. Depth-derived

  16. Enhancing the Effectiveness of Carbon Dioxide Flooding by Managing Asphaltene Precipitation

    SciTech Connect (OSTI)

    Deo, Milind D.

    2002-02-21

    Objectives of this project was to understand asphaltene precipitation in General and carbon dioxide induced precipitation in particular. To this effect, thermodynamic and kinetic experiments with the Rangely crude oil were conducted and thermodynamic and reservoir models were developed.

  17. Geostatistical Mapping of Mountain Precipitation Incorporating Autosearched Effects of Terrain and Climatic Characteristics

    E-Print Network [OSTI]

    Texas at San Antonio, University of

    Geostatistical Mapping of Mountain Precipitation Incorporating Autosearched Effects of Terrain 2004, in final form 30 March 2005) ABSTRACT Hydrologic and ecologic studies in mountainous terrain mountain precipitation using only precipi- tation gauge data. The ASOADeK model considers both

  18. Species-specific phenological responses to winter temperature and precipitation in a water-limited ecosystem

    E-Print Network [OSTI]

    Mazer, SJ; Gerst, KL; Gerst, KL; Matthews, ER; Matthews, ER; Evenden, A

    2015-01-01

    and precipitation in a water-limited ecosystem S USAN J. Mand precipitation in a water-limited ecosystem. Ecosphere 6(information is available from water-limited ecosystems. In

  19. Characteristics of warm season precipitating storms in the Arkansas–Red River basin

    E-Print Network [OSTI]

    Tucker, Donna F.; Li, Xingong

    2009-07-16

    [1] Analysis of a multisensor precipitation product enables us to extract the precipitation from individual storms in the Arkansas–Red River drainage basin over a period of 11 years. We examine the year-to-year and ...

  20. The relation of the vegetation on the Texas Range Station to soils, precipitation, and grazing 

    E-Print Network [OSTI]

    Thomas, Gerald Waylett

    1954-01-01

    Precipitation is an important element in the hydrological cycle. To predict and simulate large-scale precipitation, Global Circulation Models (GCMs) are widely used. However, their grid scale is too big to apply to local ...

  1. Scaling of Precipitation Extremes over a Wide Range of Climates Simulated with an Idealized GCM

    E-Print Network [OSTI]

    O'Gorman, Paul Ambrose

    Extremes of precipitation are examined in a wide range of climates simulated with an idealized aquaplanet GCM. The high percentiles of daily precipitation increase as the climate warms. Their fractional rate of increase ...

  2. Intensification of precipitation extremes with warming in a cloud resolving model

    E-Print Network [OSTI]

    Muller, Caroline

    A cloud-resolving model is used to investigate the effect of warming on high percentiles of precipitation (precipitation extremes) in the idealized setting of radiative-convective equilibrium. While this idealized setting ...

  3. Sorption and Precipitation of Co(II) in Hanford Sediments and...

    Office of Scientific and Technical Information (OSTI)

    Sorption and Precipitation of Co(II) in Hanford Sediments and Alkaline Aluminate Solutions Citation Details In-Document Search Title: Sorption and Precipitation of Co(II) in...

  4. Kinetic Precipitation of Solution-Phase Polyoxomolybdate Followed by Transmission Electron Microscopy

    E-Print Network [OSTI]

    Cammers, Arthur

    Kinetic Precipitation of Solution-Phase Polyoxomolybdate Followed by Transmission Electron} keplerate after three days revealed large species (r=20±30 nm) in the co- precipitate, whereas {Mo132

  5. phate co-precipitation to introduce the DNA into cultured cells--was not effi-

    E-Print Network [OSTI]

    Capecchi, Mario R.

    phate co-precipitation to introduce the DNA into cultured cells--was not effi- cient to the DNA­calcium phosphate co-precipitate. Using a similar selection scheme, I sought to determine whether

  6. Analysis of Precipitation Using Satellite Observations and Comparisons with Global Climate Models 

    E-Print Network [OSTI]

    Murthi, Aditya

    2011-08-08

    In this study, the space-time relationship of precipitation fields is examined by testing the Taylor's "frozen field" hypothesis (TH). Specifically, the hypothesis supposes that if a spatio-temporal precipitation field ...

  7. The Effects of Great Plains Irrigation on the Surface Energy Balance, Regional Circulation, and Precipitation

    E-Print Network [OSTI]

    Huber, David B.; Brunsell, Nathaniel A.; Mechem, David B.

    2014-05-05

    Irrigation provides a needed source of water in regions of low precipitation. Adding water to a region that would otherwise see little natural precipitation alters the partitioning of surface energy fluxes, the evolution ...

  8. Interannual variability of summer precipitation in Texas and its implication to summer drought 

    E-Print Network [OSTI]

    Myoung, Boksoon

    2009-05-15

    Since Texas normally receives most of its precipitation in the warm season, precipitation deficits in summertime may bring serious agricultural and hydrological disasters. While the underlying physical processes of summer ...

  9. Optical manifold

    DOE Patents [OSTI]

    Falicoff, Waqidi; Chaves, Julio C.; Minano, Juan Carlos; Benitez, Pablo; Dross, Oliver; Parkyn, Jr., William A.

    2010-02-23

    Optical systems are described that have at least one source of a beam of blue light with divergence under 15.degree.. A phosphor emits yellow light when excited by the blue light. A collimator is disposed with the phosphor and forms a yellow beam with divergence under 15.degree.. A dichroic filter is positioned to transmit the beam of blue light to the phosphor and to reflect the beam of yellow light to an exit aperture. In different embodiments, the beams of blue and yellow light are incident upon said filter with central angles of 15.degree., 22.degree., and 45.degree.. The filter may reflect all of one polarization and part of the other polarization, and a polarization rotating retroreflector may then be provided to return the unreflected light to the filter.

  10. Future credible precipitation occurrences in Los Alamos, New Mexico

    SciTech Connect (OSTI)

    Abeele, W.V.

    1980-09-01

    I have studied many factors thought to have influenced past climatic change. Because they might recur, they are possible suspects for future climatic alterations. Most of these factors are totally unpredictable; therefore, they cast a shadow on the validity of derived climatic predictions. Changes in atmospheric conditions and in continental surfaces, variations in solar radiation, and in the earth's orbit around the sun are among the influential mechanisms investigated. Even when models are set up that include the above parameters, their reliability will depend on unpredictable variables totally alien to the model (like volcanic eruptions). Based on climatic records, however, maximum precipitation amounts have been calculated for different probability levels. These seem to correspond well to past precipitation occurrences, derived from tree ring indices. The link between tree ring indices and local climate has been established through regression analysis.

  11. Characteristics of Interconnected Delta-Hydride Precipitates in Zr

    SciTech Connect (OSTI)

    L.J. Carroll; M.R. Tonks; T.M. Lillo; B.S. Fromm; DC Haggard; T.C. Morris; W.D. Swank; T.L. Trowbridge; M.C. Carroll

    2014-09-01

    Characterization of extended delta-ZrH1.66 structures in unalloyed zirconium by electron backscatter diffraction analysis confirms that they consist of many interconnected precipitates of multiple, but distinctly related, orientations. The expected orientation relationship of (0001)a-Zr//(111)delta-ZrH1.66 is confirmed between the hydride and one of the surrounding a-Zr matrix grains. The delta-ZrH1.66 precipitates do not extend in a discrete crystalline orientation, but are regularly divided by 60° type {111} twins in which adjacent delta-ZrH1.66 grains share a {111} plane. The observed matching of the close-packed FCC planes of impinging or twinned hydrides within an interconnected structure enables the minimization of the overall interfacial energy through successive nucleation and growth events and twinning.

  12. Spatial predictive distribution for precipitation based on numerical weather predictions (NWP)

    E-Print Network [OSTI]

    Steinsland, Ingelin

    for precipitation based on NWP #12;Motivation, hydro power production How much water comes when? With uncertainty

  13. The SLS optics beamline

    E-Print Network [OSTI]

    2006-01-01

    The SLS Optics Beamline U. Flechsig ? , R. Abela ? , R.in the ?eld of x-ray optics and synchrotron radiation in-radiation, beamline optics, channel cut monochromator,

  14. SURFACE NONLINEAR OPTICS

    E-Print Network [OSTI]

    Shen, Y.R.

    2010-01-01

    B. de Castro, and Y. R. Shen, Optics Lett. i, 393 See, for3, 1980 SURFACE NONLINEAR OPTICS Y.R. Shen, C.K. Chen, andde Janiero SURFRACE NONLINEAR OPTICS Y. R. Shen, C. K. Chen,

  15. NONLINEAR OPTICS AT INTERFACES

    E-Print Network [OSTI]

    Chen, Chenson K.

    2010-01-01

    N. Bloembergen, Nonlinear Optics (W. A. Benjamin, 1977) p.Research Division NONLINEAR OPTICS AT INTERFACES Chenson K.ED LBL-12084 NONLINEAR OPTICS AT INTERFACES Chenson K. Chen

  16. Assessment of operating parameter variation on electrostatic precipitator performance 

    E-Print Network [OSTI]

    Gunn, Roam Anthony

    1974-01-01

    , and the treatment and disposal of collected materials such as flyash from coal-fired power generating plants. ~Ca ital ~Char es. Capital charges general'ly include the costs incurred from property taxes, insurance premiums on plant facilities and other.... Summary of field results of SO flyash conditioning. 5. Sulfur conditioning of flyash 6. Sodium conditioning of flyash 7. Gallatin steam plant economic data 8. Precipitator related costs, 1960 to 1969 26 27 29 35 36 9. Overall costs...

  17. Response of South American ecosystems to precipitation variability

    SciTech Connect (OSTI)

    Ganguly, Auroop R [ORNL; Erickson III, David J [ORNL; Bras, Rafael L [ORNL

    2009-12-01

    The Ecosystem Demography Model 2 is a dynamic ecosystem model and land surface energy balance model. ED2 discretizes landscapes of particular terrain and meteorology into fractional areas of unique disturbance history. Each fraction, defined by a shared vertical soil column and canopy air space, contains a stratum of plant groups unique in functional type, size and number density. The result is a vertically distributed representation of energy transfer and plant dynamics (mortality, productivity, recruitment, disturbance, resource competition, etc) that successfully approximates the behaviour of individual-based vegetation models. In previous exercises simulating Amazonian land surface dynamics with ED2, it was observed that when using grid averaged precipitation as an external forcing the resulting water balance typically over-estimated leaf interception and leaf evaporation while under estimating through-fall and transpiration. To investigate this result, two scenario were conducted in which land surface biophysics and ecosystem demography over the Northern portion of South America are simulated over {approx}200 years: (1) ED2 is forced with grid averaged values taken from the ERA40 reanalysis meteorological dataset; (2) ED2 is forced with ERA40 reanalysis, but with its precipitation re-sampled to reflect statistical qualities of point precipitation found at rain gauge stations in the region. The findings in this study suggest that the equilibrium moisture states and vegetation demography are co-dependent and show sensitivity to temporal variability in precipitation. These sensitivities will need to be accounted for in future projections of coupled climate-ecosystem changes in South America.

  18. Dynamics of precipitation pattern formation at geothermal hot springs

    E-Print Network [OSTI]

    Nigel Goldenfeld; Pak Yuen Chan; John Veysey

    2006-05-26

    We formulate and model the dynamics of spatial patterns arising during the precipitation of calcium carbonate from a supersaturated shallow water flow. The model describes the formation of travertine deposits at geothermal hot springs and rimstone dams of calcite in caves. We find explicit solutions for travertine domes at low flow rates, identify the linear instabilities which generate dam and pond formation on sloped substrates, and present simulations of statistical landscape evolution.

  19. Transuranic/Strontium Precipitation and Filtration of Hanford Complexant Waste

    SciTech Connect (OSTI)

    Nash, C.A.

    2001-01-31

    A crossflow filtration campaign to remove entrained solids and precipitated solids from Hanford Tank 241-AN-102 Envelope C was completed. A 0.61 m (2-foot) long, 0.0095 m (3/8 inches) internal diameter, 0.1 micron pore size Mott crossflow filter tube was used. An Envelope C (241-AN-102) sample containing entrained solids was then successfully pretreated for removal of strontium-90 and transuranic activity. The 1.2-liter sample was caustic adjusted, strontium and permanganate precipitated, and crossflow filtered in a bench scale demonstration. Filtration fluxes for the precipitate ranged from 2.93 to 8.80 m{sup 3}/(m{sup 2}day) [0.05 to 0.15 gpm/ft{sup 2}]. Transmembrane pressures were in the range of 2.06 to 4.83 bar [30 to 70 psid] and crossflow velocities were in the range of 2.8 to 4.6 m/s [9 to 15 ft/s]. The filtrate product was decontaminated for strontium by a factor of 30 (1.7 uCi/ml at 5.8 M sodium). This work provides important confirmation of the new process to achieve both acceptable filterability and decontamination for Envelope C wastes to be treated by the Hanford River Protection Project (RPP).

  20. CRIRES Science Verification Proposal Determining the atmospheric precipitable water vapour content

    E-Print Network [OSTI]

    Liske, Jochen

    CRIRES Science Verification Proposal Determining the atmospheric precipitable water vapour content the precipitable water vapour (PWV) content over Paranal by determining the equivalent widths of 7 carefully. Scientific Case: Atmospheric precipitable water vapour (PWV) is one of the crucial parameters in infrared (IR

  1. A TEST OF THE PRECIPITATION AMOUNT AND INTENSITY MEASUREMENTS WITH THE OTT PLUVIO

    E-Print Network [OSTI]

    Wauben, Wiel

    A TEST OF THE PRECIPITATION AMOUNT AND INTENSITY MEASUREMENTS WITH THE OTT PLUVIO Wiel M.F. Wauben precipitation sensor of Ott has been tested at KNMI in order to find out whether it is a suitable candidate for replacing the current operational KNMI precipitation gauge. Tests performed at the calibration facilities

  2. Frequency Modes of Monsoon Precipitation in Arizona and New Mexico ANNE W. NOLIN

    E-Print Network [OSTI]

    Kurapov, Alexander

    Frequency Modes of Monsoon Precipitation in Arizona and New Mexico ANNE W. NOLIN Department proportion of the annual precipitation for Arizona and New Mexico arrives during the summer monsoon. Forty-one years of daily monsoon season precipitation data for Arizona and New Mexico were studied using wavelet

  3. New insights to cloud seeding for enhancing precipitation and for hail suppression Daniel Rosenfeld

    E-Print Network [OSTI]

    Daniel, Rosenfeld

    New insights to cloud seeding for enhancing precipitation and for hail suppression Daniel Rosenfeld microphysical observations of the impacts of aerosols on cloud microstructure and precipitation forming- forming processes to the role of aerosols in the rate of conversion of cloud droplets into precipitation

  4. Precipitation of interstitial iron in multicrystalline silicon AnYao Liu1, a

    E-Print Network [OSTI]

    Precipitation of interstitial iron in multicrystalline silicon AnYao Liu1, a and Daniel Macdonald1, multicrystalline silicon, precipitation, supersaturation, spatial distribution Abstract The internal gettering of iron in silicon via iron precipitation at low processing temperatures is known to improve solar cell

  5. Precipitation of iron in multicrystalline silicon during annealing A. Y. Liu and Daniel Macdonald

    E-Print Network [OSTI]

    Precipitation of iron in multicrystalline silicon during annealing A. Y. Liu and Daniel Macdonald.203.43.22 On: Tue, 18 Mar 2014 02:19:30 #12;Precipitation of iron in multicrystalline silicon during annealing 2014) In this paper, the precipitation kinetics of iron in multicrystalline silicon during moderate

  6. Precipitation patterns with polygonal boundaries between electrolytes Changwei Pan,a

    E-Print Network [OSTI]

    Epstein, Irving R.

    Precipitation patterns with polygonal boundaries between electrolytes Changwei Pan,a Qingyu Gao to dislocations, but instead yield concentric precipitation rings. A simple model of nucleation growth enables us in a banded deposition of precipitation. This phenomenon has attracted the attention of scientists in many

  7. Fe3O4 magnetic nanoparticles synthesis from tailings by ultrasonic chemical co-precipitation

    E-Print Network [OSTI]

    Volinsky, Alex A.

    Fe3O4 magnetic nanoparticles synthesis from tailings by ultrasonic chemical co-precipitation Shen online xxxx Keywords: Fe3O4 nanoparticles Ultrasonic-assisted chemical co-precipitation Surfaces Magnetic-assisted chemical co- precipitation utilizing high purity iron separated from iron ore tailings by acidic leaching

  8. Precipitation and mechanical properties of supersaturated Al-Zn-Mg alloys processed by severe plastic deformation

    E-Print Network [OSTI]

    Gubicza, Jenő

    Precipitation and mechanical properties of supersaturated Al-Zn-Mg alloys processed by severe density, precipitation. Abstract. Supersaturated Al-4.8Zn-1.2Mg-0.14Zr and Al-5.7Zn-1.9Mg-0.35Cu (wt distribution and the characteristic parameters of the dislocation structure of both Al matrix and precipitates

  9. Comparison of Various Precipitation Downscaling Methods for the Simulation of Streamflow in a Rainshadow River Basin*

    E-Print Network [OSTI]

    Salathé Jr., Eric P.

    Comparison of Various Precipitation Downscaling Methods for the Simulation of Streamflow simulations of precipitation from climate models lack sufficient resolution and contain large biases that make, the effectiveness of several methods to downscale large-scale precipitation is examined. To facilitate comparisons

  10. New Observations of Precipitation Initiation in Warm Cumulus Clouds JENNIFER D. SMALL AND PATRICK Y. CHUANG

    E-Print Network [OSTI]

    Chuang, Patrick Y.

    New Observations of Precipitation Initiation in Warm Cumulus Clouds JENNIFER D. SMALL AND PATRICK Y) to initiate precipitation (termed collision­coalescence initiators or CCIs) are found preferentially at cloud locally enhances collision­coalescence rates. 1. Introduction The initiation of precipitation in warm

  11. CRYSTAL PRECIPITATION AND DISSOLUTION IN A THIN STRIP T.L. VAN NOORDEN

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    CRYSTAL PRECIPITATION AND DISSOLUTION IN A THIN STRIP T.L. VAN NOORDEN Abstract. A two-dimensional micro-scale model for crystal dissolution and precipitation in a porous medium is presented. The local dissolution and precipitation in a porous medium. The microscopic model that serves as the starting point

  12. Towards understanding dominant processes in complex dynamical systems: Case of precipitation extremes

    E-Print Network [OSTI]

    Obradovic, Zoran

    Towards understanding dominant processes in complex dynamical systems: Case of precipitation.obradovic@temple.edu ABSTRACT Complex dynamical systems like precipitation extremes under climate variability or change to characterize the effect of dominant processes on precipitation extremes, annually and seasonally, and from

  13. Regional summer precipitation events in Asia and their changes in the past decades

    E-Print Network [OSTI]

    Qian, Weihong

    Regional summer precipitation events in Asia and their changes in the past decades Cai Yao,1 Song; accepted 11 June 2008; published 4 September 2008. [1] A recently derived data set of daily precipitation is used to study the summer precipitation events over Asia and their changes in the decades of 1978

  14. PHANTOM PRECIPITATION AND OTHER PROBLEMS IN TRMM Matthew Miller and Sandra Yuter

    E-Print Network [OSTI]

    Yuter, Sandra

    PHANTOM PRECIPITATION AND OTHER PROBLEMS IN TRMM PRODUCTS Matthew Miller and Sandra Yuter North) satellite carries two instruments to measure precipitation: the TRMM Microwave Imager (TMI) and the Precipitation Radar (PR). Examination of instantaneous orbit data from TMI and PR reveals several problems

  15. Coarsening of precipitation patterns in a moving reaction-diffusion front A. Volford,1

    E-Print Network [OSTI]

    Rácz, Zoltán

    Coarsening of precipitation patterns in a moving reaction-diffusion front A. Volford,1 I. Lagzi,2 November 2009 Precipitation patterns emerging in a two-dimensional moving front are investigated on the example of NaOH diffusing into a gel containing AlCl3. The time evolution of the precipitate Al OH 3 can

  16. Disentangling the Multiple Sources of Large-Scale Variability in Australian Wintertime Precipitation

    E-Print Network [OSTI]

    Sherwood, Steven

    Precipitation PENELOPE MAHER AND STEVEN C. SHERWOOD Climate Change Research Centre and ARC Centre of Excellence received 25 October 2013, in final form 4 March 2014) ABSTRACT Precipitation is influenced by multiple large-scale natural processes. Many of these large-scale precipitation ``drivers'' are not independent

  17. Macroweather precipitation variability up to global and1 centennial scales2

    E-Print Network [OSTI]

    Lovejoy, Shaun

    1 Macroweather precipitation variability up to global and1 centennial scales2 3 M. I. P. de Lima1 Lima (iplima@uc.pt )10 11 12 #12;2 Abstract13 14 The study of precipitation has revealed the existence. In the macroweather regime,18 atmospheric fields including precipitation have unique scaling properties characterized

  18. SPATIAL PRECIPITATION TRENDS AND EFFECTS OF CLIMATE CHANGE ON THE HAWAI'IAN HUALALAI AQUIFER

    E-Print Network [OSTI]

    Anderson, Charles W.

    THESIS SPATIAL PRECIPITATION TRENDS AND EFFECTS OF CLIMATE CHANGE ON THE HAWAI'IAN HUALALAI AQUIFER;Copyright by Alyssa Danielle Hendricks 2015 All Rights Reserved #12;ii ABSTRACT SPATIAL PRECIPITATION TRENDS and understood spatially and temporally at a multitude of scales, trends in precipitation are less understood

  19. Metal precipitation at grain boundaries in silicon: Dependence on grain boundary character and dislocation decoration

    E-Print Network [OSTI]

    Metal precipitation at grain boundaries in silicon: Dependence on grain boundary character are combined to determine the dependence of metal silicide precipitate formation on grain boundary character and microstructure in multicrystalline silicon mc-Si . Metal silicide precipitate decoration is observed to increase

  20. Precipitation suppression by anthropogenic air pollution: major loss of water resources where we need them most

    E-Print Network [OSTI]

    Daniel, Rosenfeld

    Precipitation suppression by anthropogenic air pollution: major loss of water resources where we inferences of air pollution suppressing precipitation lead us to investigate historical climate records of precipitation in locations that are dominated by clouds that are most susceptible to the detrimental impacts

  1. Holocene precipitation seasonality captured by a dual hydrogen and oxygen isotope approach at Steel Lake, Minnesota

    E-Print Network [OSTI]

    Hu, Feng Sheng

    Holocene precipitation seasonality captured by a dual hydrogen and oxygen isotope approach at SteelMenocal Keywords: seasonal precipitation middle Holocene oxygen isotopes hydrogen isotopes forest­prairie boundary midcontinental North America. However, neither the climatic driver nor the seasonal character of precipitation

  2. 3 Carbide Precipitation Carbides are largely responsible for the commercial failure of many of the early

    E-Print Network [OSTI]

    Cambridge, University of

    3 Carbide Precipitation Carbides are largely responsible for the commercial failure of many are discussed in Chapter 10; the purpose here is to deal with the nature and extent of carbide precipitation the carbides precipitate from austenite which is enriched in carbon; upper bainitic ferrite itself is free from

  3. Hydride precipitation kinetics in Zircaloy-4 studied using synchrotron X-ray diffraction

    E-Print Network [OSTI]

    Motta, Arthur T.

    Hydride precipitation kinetics in Zircaloy-4 studied using synchrotron X-ray diffraction Olivier F fuel cladding and precipitate as brittle hydride particles, which may reduce cladding ductility. Dissolved hydrogen responds to temperature gradients, resulting in transport and precipitation into cold

  4. Propagating Precipitation Waves: Experiments and Modeling Mark R. Tinsley,* Darrell Collison, and Kenneth Showalter*

    E-Print Network [OSTI]

    Showalter, Kenneth

    Propagating Precipitation Waves: Experiments and Modeling Mark R. Tinsley,* Darrell Collison Virginia 26506-6045, United States ABSTRACT: Traveling precipitation waves, including counterrotating spiral waves, are observed in the precipitation reaction of AlCl3 with NaOH [Volford, A.; et al. Langmuir

  5. Towards Long-lead Forecasting of Extreme Flood Events: A Data Mining Framework for Precipitation Cluster

    E-Print Network [OSTI]

    Ding, Wei

    Towards Long-lead Forecasting of Extreme Flood Events: A Data Mining Framework for Precipitation of precipitation events occurring over from several days to several weeks. Though precise short- term forecasting of precipitation clusters can be attempted by identifying persistent atmospheric regimes that are conducive

  6. A nonparametric wet/dry spell model for resampling daily precipitation

    E-Print Network [OSTI]

    Tarboton, David

    A nonparametric wet/dry spell model for resampling daily precipitation Upmanu Lall Department precipitation at a site. The model considers alternating sequences of wet and dry days in a given season, wet spell length, precipitation amount, and wet spell length given prior to dry spell length

  7. A probabilistic approach to the prediction of area weather events, applied to precipitation

    E-Print Network [OSTI]

    Schmidt, Volker

    A probabilistic approach to the prediction of area weather events, applied to precipitation Bjoern in the context of estimating the probability of the meteorological event `occurrence of precipitation'. We treat roughly be interpreted as precipitation cells. The germ-grain model is completely characterized

  8. Precipitation Characteristics of the South American Monsoon System Derived from Multiple Datasets

    E-Print Network [OSTI]

    Bookhagen, Bodo

    Precipitation Characteristics of the South American Monsoon System Derived from Multiple Datasets and is characterized by pronounced seasonality in precipitation during the austral summer. This study compares several statistical properties of daily gridded precipitation from different data (1998­2008): 1) Physical Sci- ences

  9. Contrasting trait responses in plant communities to experimental and geographic variation in precipitation

    E-Print Network [OSTI]

    Kraft, Nathan

    in precipitation Brody Sandel1,2 , Leah J. Goldstein3 , Nathan J.B. Kraft1,4 , Jordan G. Okie5 , Michal I. Shuldman: climate change, experiments, functional ecology, plant communities, plant functional traits, precipitation. Summary · Patterns of precipitation are likely to change significantly in the coming century

  10. Helicoidal precipitation patterns in silica and agarose gels Shibi Thomas a

    E-Print Network [OSTI]

    Rácz, Zoltán

    Helicoidal precipitation patterns in silica and agarose gels Shibi Thomas a , George Varghese b patterns grown in agarose and silica gels were studied using reaction­diffusion­precipitation processes a complex interplay among the unstable precipitation modes, the motion of the reaction front, and the noise

  11. Coupling Between Precipitation and Contact-Line Dynamics: Multiring Stains and Stick-Slip Motion

    E-Print Network [OSTI]

    Chang, Hsueh-Chia

    Coupling Between Precipitation and Contact-Line Dynamics: Multiring Stains and Stick-Slip Motion after depinning and is repinned at an internal precipitate ring that determines the location of the next and precipitation dynamics hence control this unsteady drop motion. DOI: 10.1103/PhysRevLett.100.044503 PACS numbers

  12. Precipitation microstructure of ultrafine-grained Al-Zn-Mg alloys processed by severe plastic deformation

    E-Print Network [OSTI]

    Gubicza, Jenő

    Precipitation microstructure of ultrafine-grained Al-Zn-Mg alloys processed by severe plastic analysis, supersaturated AlZnMg alloys, dislocation density, precipitation. Abstract. Supersaturated Al-4 of the dislocation structure of both Al matrix and precipitates were determined by X-ray diffraction line profile

  13. Running Head: Correlation of Microbial Communities with Caclium Carbonate1 (Travertine) Mineral Precipitation2

    E-Print Network [OSTI]

    Goldenfeld, Nigel

    Precipitation2 3 4 Correlation of Microbial Communities with Calcium Carbonate (Travertine)5 Mineral Precipitation at Mammoth Hot Springs, Yellowstone National Park, USA6 George T. Bonheyo1, 3 , Jorge Frias-Lopez1 of changing environmental conditions and associated calcium carbonate mineral18 precipitation along the spring

  14. CRYSTAL PRECIPITATION AND DISSOLUTION IN A POROUS MEDIUM: EFFECTIVE EQUATIONS AND NUMERICAL

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    CRYSTAL PRECIPITATION AND DISSOLUTION IN A POROUS MEDIUM: EFFECTIVE EQUATIONS AND NUMERICAL expansions to derive a macroscopic law for crystal dissolution and precipitation in a porous medium and precipitation, are of practical importance in many physical, biological and chemical applications. Macroscopic

  15. Energetic electron precipitation and the NO abundance in the upper atmosphere: A direct

    E-Print Network [OSTI]

    Řstgaard, Nikolai

    Energetic electron precipitation and the NO abundance in the upper atmosphere: A direct comparison precipitating energetic electrons. The comparisons are done for the beginning of a geomagnetic storm event on 2 of the NO g-band. Since a significant part of the electron precipitation takes place during the night

  16. Changes in upper mesospheric and lower thermospheric temperatures caused by energetic particle precipitation

    E-Print Network [OSTI]

    Bergen, Universitetet i

    precipitation H. Nesse Tyssřy,1,2 J. Stadsnes,2 M. Sřrbř,2 C. J. Mertens,3 and D. S. Evans4 Received 10 March precipitation is performed on the basis of data from the Thermosphere Ionosphere Mesosphere Energetics precipitation can be obtained close in time to the SABER (Sounding of the Atmosphere using Broadband Emission

  17. Spatio-temporal precipitation modeling based on time-varying regressions Oleg Makhnin

    E-Print Network [OSTI]

    Borchers, Brian

    Spatio-temporal precipitation modeling based on time-varying regressions Oleg Makhnin Department on monthly precipitation data from gauge measurements. The model accounts for orographic effects in northern New Mexico. We assess spatio-temporal variability and also trace the dependence of precipitation

  18. Evidence of enhanced precipitation due to irrigation over the Great Plains of the United States

    E-Print Network [OSTI]

    Robock, Alan

    Evidence of enhanced precipitation due to irrigation over the Great Plains of the United States of the local hydrological cycle has enhanced the regional precipitation. We examined station and gridded precipitation observations for the warm season months over and downwind of the Ogallala over the 20th century

  19. Transition metal co-precipitation mechanisms in silicon T. Buonassisi a,*, M. Heuer a,1

    E-Print Network [OSTI]

    Transition metal co-precipitation mechanisms in silicon T. Buonassisi a,*, M. Heuer a,1 , A Available online 18 September 2007 Abstract Formation mechanisms of precipitates containing multiple by synchrotron-based X-ray microprobe techniques. Precipitates formed at low (655 °C) and high (1200 °C

  20. GLOBAL SCALE ELECTRON PRECIPITATION DURING SUBSTORM EXPANSIONS N. stgaard, J. Stadsnes, J. Bjordal, E. Thorsen

    E-Print Network [OSTI]

    Řstgaard, Nikolai

    GLOBAL SCALE ELECTRON PRECIPITATION DURING SUBSTORM EXPANSIONS N. Řstgaard, J. Stadsnes, J. Bjordal of the patterns of electron precipitation through imaging of the atmospheric X-ray bremsstrahlung and the auroral energy (multi-keV) electron precipitation. During the substorm expansion phase, clear time delays occur

  1. Precipitation sensitivity to autoconversion rate in a Numerical Weather Prediction model

    E-Print Network [OSTI]

    Marsham, John

    1 Precipitation sensitivity to autoconversion rate in a Numerical Weather Prediction model Céline;2 Summary Aerosols are known to significantly affect cloud and precipitation patterns and intensity. The impact of changing cloud droplet number concentration (CDNC), on cloud and precipitation evolution can

  2. Precipitation and Temperature Effects on Populations of Aedes albopictus (Diptera: Culicidae): Implications for Range Expansion

    E-Print Network [OSTI]

    Juliano, Steven A.

    ARTICLE Precipitation and Temperature Effects on Populations of Aedes albopictus (Diptera and precipitation regime encountered over the life cycle of Aedes albopictus (Skuse) affects populations. Caged precipitation regimes: (1) low ßuctuation regime - water within the containers was allowed to evaporate to 90

  3. Casein precipitation equilibria in the presence of calcium ions and phosphates

    E-Print Network [OSTI]

    Velev, Orlin D.

    Casein precipitation equilibria in the presence of calcium ions and phosphates C. Guo a , B induced aggregation and precipitation equilibria of b-casein were studied in the presence or absence. The precipitation curves are in good agreement with the model, showing the expected larger induction region

  4. Precipitation Change Effects Evaluated For Seven Ecosystems With Distinctive Vegetation and Hydrology

    E-Print Network [OSTI]

    Post, Wilfred M.

    Precipitation Change Effects Evaluated For Seven Ecosystems With Distinctive Vegetation and Hydrology Contact: Paul J. Hanson hansonpj@ornl.gov 865-574-5361 Doubled Precipitation Contact: Paul JCent, ORCHIDEE, TECO), were used to explored effects of potential precipitation changes (P) on water limitation

  5. Copper Precipitation Hardened, High Strength, Weldable Steel by Semyon Vaynman 1

    E-Print Network [OSTI]

    Copper Precipitation Hardened, High Strength, Weldable Steel by Semyon Vaynman 1 , Morris E. Fine 1 strength was achieved by copper precipitation hardening. The steel was designed to be air cooled from hot through precipitation hardening. Ni was added to prevent hot- shortness during hot rolling. Nb and Ti were

  6. COMMUNICATIONS Precipitation of -SiC in Si1 yCy alloys

    E-Print Network [OSTI]

    Kolodzey, James

    COMMUNICATIONS Precipitation of -SiC in Si1 yCy alloys C. Guedj,a) M. W. Dashiell, L. Kulik in intensity while another mode due to incoherent silicon carbide precipitates appeared at 810 cm 1 . For lower is a precursor to SiC precipitation. Theoretical calculations based on the anharmonic Keating model predict

  7. Localized precipitation and runoff on Mars Edwin S. Kite,1,2

    E-Print Network [OSTI]

    Localized precipitation and runoff on Mars Edwin S. Kite,1,2 Timothy I. Michaels,3 Scot Rafkin,3) to simulate lake storms on Mars, finding that intense localized precipitation will occur for lake size 103 km2 on Mars involve continuous precipitation, and their vertical velocities and plume heights exceed those

  8. Precipitation Response to the Gulf Stream in an Atmospheric GCM* AKIRA KUWANO-YOSHIDA

    E-Print Network [OSTI]

    Xie, Shang-Ping

    Precipitation Response to the Gulf Stream in an Atmospheric GCM* AKIRA KUWANO-YOSHIDA Earth The precipitation response to sea surface temperature (SST) gradients associated with the Gulf Stream a narrow band of precipitation, surface convergence, and evaporation that closely follows the Gulf Stream

  9. Electron precipitation from EMIC waves: a case study from 31 May1 Mark A. Clilverd1

    E-Print Network [OSTI]

    Otago, University of

    Electron precipitation from EMIC waves: a case study from 31 May1 20132 3 Mark A. Clilverd1-incident electron precipitation by a20 network of ground-based Antarctic Arctic Radiation-belt Dynamic Deposition POES detected 30-80 keV proton24 precipitation drifting westwards at locations that were consistent

  10. EUROBRISA products documentation This page (http://eurobrisa.cptec.inpe.br/) presents 1-month lead South America precipitation

    E-Print Network [OSTI]

    South America precipitation forecasts and verification products for three month seasons. For example surface temperatures as predictor variables for precipitation over South America. For example, the observed sea surface temperature in the previous December is used as predictor for precipitation

  11. Asian summer monsoon precipitation recorded by stalagmite oxygen isotopic composition in the western Loess Plateau during AD1875-2003 and its linkage with ocean-atmosphere system

    E-Print Network [OSTI]

    2008-01-01

    Indian Ocean monsoon precipitation from a spe- temperature165 ? 178[doi] sent-day precipitation: data and modeling. Jtopic composition of precipitation in Chian. Geochimica ( in

  12. Precipitation over South America during the Last Glacial Maximum: An analysis of the "amount effect"ť with a water isotope-enabled general circulation model

    E-Print Network [OSTI]

    Lee, Jung-Eun; Johnson, Kathleen; Fung, Inez

    2009-01-01

    Modeling d 18 O in precipitation over the tropical Americas:2007), Millennial-scale precipitation changes in southernStable isotopes in precipitation, Tellus, 16, 436 – Fedorov,

  13. Chapter 2 Diffractive Optics

    E-Print Network [OSTI]

    2010-09-14

    Diffractive optics is an emerging technology with many applications. Some of the important applications include the design and fabrication of optical elements ...

  14. Advanced Optical Technologies

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

    laser. Today, the optical team designs and fabricates a variety of custom diffractive optics for researchers worldwide. Included are multilayer dielectric and gold-overcoated...

  15. Planar micro-optic solar concentration

    E-Print Network [OSTI]

    Karp, Jason Harris

    2010-01-01

    Planar Micro-Optic Solar Collectors," Optics for Solarin planar micro-optic solar collectors,” Optics Express, (inin planar micro-optic solar collectors,” Optics Express (in

  16. Average Depth of Crude Oil and Natural Gas Wells

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet) Wyoming Dry Natural Gas ReservesAlabamaAboutTotal Energy GlossaryDepth of Crude

  17. Irradiation-induced nano-voids in strained tin precipitates in silicon

    SciTech Connect (OSTI)

    Gaiduk, P. I., E-mail: gaiduk@phys.au.dk [Department of Physics and Astronomy/iNANO, Aarhus University, Gustav Wieds Vej 14, DK-8000 Aarhus C (Denmark); Department of Physical Electronics and Nanotechnology, Belarusian State University, prosp. Nezavisimosti, 4, 220030 Minsk (Belarus); Lundsgaard Hansen, J., E-mail: johnlh@phys.au.dk; Nylandsted Larsen, A., E-mail: anl@phys.au.dk [Department of Physics and Astronomy/iNANO, Aarhus University, Gustav Wieds Vej 14, DK-8000 Aarhus C (Denmark)

    2014-04-14

    We report on self-assembling of spherically shaped voids in nanometer size strained Sn precipitates after irradiation with He{sup +} ions in different conditions. It is found that high-temperature irradiation induces vacancies which are collected by compressively strained Sn precipitates enhancing of out-diffusion of Sn atoms from the precipitates. Nano-voids formation takes place simultaneously with a ?- to ?-phase transformation in the Sn precipitates. Post-irradiation thermal treatment leads to the removal of voids and a backward transformation of the Sn phase to ?-phase. Strain-enhanced separation of point defects along with vacancy assisted Sn out-diffusion and precipitate dissolution are discussed.

  18. Precipitation of sigma and chi phases in ?-ferrite of Type 316FR weld metals

    SciTech Connect (OSTI)

    Chun, Eun Joon; Baba, Hayato; Nishimoto, Kazutoshi; Saida, Kazuyoshi

    2013-12-15

    The decomposition behavior and kinetics of ?-ferrite are examined using aging treatments between 873 and 1073 K for Type 316FR stainless steel weld metals with different solidification modes (316FR AF, 316FR FA). The dominant precipitates are sigma, chi, and secondary austenite nucleated at ?-ferrite/austenite interfaces or in the interior of the ferrite grains. These precipitates consume all the ferrite during isothermal aging in both 316FR AF and FA weld metals. Differences in the precipitation behavior (precipitation initiation time and precipitation speed) between weld metals can be explained by i) the degree of Cr and Mo microsegregation within ?-ferrite or austenite near ferrite and ii) the nucleation sites induced due to the solidification mode (AF or FA), such as the ferrite amount. For both weld materials, a Johnson–Mehl-type equation can express the precipitation behavior of the sigma + chi phases and quantitatively predict the behavior at the service-exposure temperatures of a fast breed reactor. - Highlights: • Precipitation of ? and ? phase in Type 316FR welds (two solidification modes) • Different precipitation behaviors: precipitation initiation time and growth speed • Johnson-Mehl–type equation is the most applicable to the precipitation behaviors • Precipitation behaviors are predicted under service conditions of FBRs.

  19. Stable isotopic study of precipitation and spring discharge on the Nevada Test Site

    SciTech Connect (OSTI)

    Ingraham, N.L.; Jacobson, R.L.; Hess, J.W.; Lyles, B.F. . Water Resources Center Nevada Univ., Reno, NV . Water Resources Center)

    1990-07-01

    Precipitation was collected in southern Nevada (on the Nevada Test Site) on a semi-regular monthly basis at 41 locations for six years for stable isotopic analysis. The precipitation record shows two time-based regimes. For the first three years of collection, the precipitation was highly variable with several large events and several dry periods. During the last three years of collection, the precipitation was much more even with no large events. However, there is no correlation between the variability in the amount of precipitation and the stable isotopic composition of precipitation. In addition, the oxygen isotope composition and discharge of two springs, Whiterock Spring and Cane Spring, issuing from perched water tables, were monitored for five years in a similar time frame as for the precipitation. 17 refs., 42 figs., 3 tabs.

  20. Evaluation of moist processes during intense precipitation in km-scale NWP models using remote sensing and in-situ data: Impact of microphysics size distribution assumptions

    SciTech Connect (OSTI)

    Van Weverberg, K.; van Lipzig, N. P. M.; Delobbe, L.

    2011-02-01

    This study investigates the sensitivity of moist processes and surface precipitation during three extreme precipitation events over Belgium to the representation of rain, snow and hail size distributions in a bulk one-moment microphysics parameterisation scheme. Sensitivities included the use of empirically derived relations to calculate the slope parameter and diagnose the intercept parameter of the exponential snow and rain size distributions and sensitivities to the treatment of hail/graupel. A detailed evaluation of the experiments against various high temporal resolution and spatially distributed observational data was performed to understand how moist processes responded to the implemented size distribution modifications. Net vapor consumption by microphysical processes was found to be unaffected by snow or rain size distribution modifications, while it was reduced replacing formulations for hail by those typical for graupel, mainly due to intense sublimation of graupel. Cloud optical thickness was overestimated in all experiments and all cases, likely due to overestimated snow amounts. The overestimation slightly deteriorated by modifying the rain and snow size distributions due to increased snow depositional growth, while it was reduced by including graupel. The latter was mainly due to enhanced cloud water collection by graupel and reduced snow depositional growth. Radar reflectivity and cloud optical thickness could only be realistically represented by inclusion of graupel during a stratiform case, while hail was found indispensable to simulate the vertical reflectivity profile and the surface precipitation structure. Precipitation amount was not much altered by any of the modifications made and the general overestimation was only decreased slightly during a supercell convective case.

  1. LABORATORY I: GEOMETRIC OPTICS

    E-Print Network [OSTI]

    Minnesota, University of

    Lab I - 1 LABORATORY I: GEOMETRIC OPTICS In this lab, you will solve several problems related to the formation of optical images. Most of us have a great deal of experience with the formation of optical images this laboratory, you should be able to: · Describe features of real optical systems in terms of ray diagrams

  2. Campbell penetration depth in Fe-based superconductors

    SciTech Connect (OSTI)

    Prommapan, Plegchart

    2011-08-15

    A 'true' critical current density, j{sub c}, as opposite to commonly measured relaxed persistent (Bean) current, j{sub B}, was extracted from the Campbell penetration depth, {lambda}{sub c}(T,H) measured in single crystals of LiFeAs, and optimally electron-doped Ba(Fe{sub 0.954}Ni{sub 0.046}){sub 2}As{sub 2} (FeNi122). In LiFeAs, the effective pinning potential is nonparabolic, which follows from the magnetic field - dependent Labusch parameter {alpha}. At the equilibrium (upon field - cooling), {alpha}(H) is non-monotonic, but it is monotonic at a finite gradient of the vortex density. This behavior leads to a faster magnetic relaxation at the lower fields and provides a natural dynamic explanation for the fishtail (second peak) effect. We also find the evidence for strong pinning at the lower fields.The inferred field dependence of the pinning potential is consistent with the evolution from strong pinning, through collective pinning, and eventually to a disordered vortex lattice. The value of j{sub c}(2 K) {approx_equal} 1.22 x 10{sup 6} A/cm{sup 2} provide an upper estimate of the current carrying capability of LiFeAs. Overall, vortex behavior of almost isotropic, fully-gapped LiFeAs is very similar to highly anisotropic d-wave cuprate superconductors, the similarity that requires further studies in order to understand unconventional superconductivity in cuprates and pnictides. In addition to LiFeAs, we also report the magnetic penetration depth in BaFe{sub 2}As{sub 2} based superconductors including irradiation of FeNi122. In unirradiated FeNi122, the maximum critical current value is, j{sub c}(2K) {approx_equal} 3.3 x 10{sup 6} A/cm{sup 2}. The magnetic-dependent feature was observed near the transition temperature in FeTe{sub 0.53}Se{sub 0.47} and irradiated FeNi122. Because of this feature, further studies are required in order to properly calibrate the Campbell penetration depth. Finally, we detected the crossing between the magnetic penetration depth and London penetration depth in optimally hold-doped Ba{sub 0.6}K{sub 0.4}Fe{sub 2}As{sub 2} (BaK122) and isovalent doped BaFe{sub 2}(As{sub 0.7}P{sub 0.3}){sub 2} (BaP122). These phenomena probably coincide with anomalous Meissner effect reported in pnicitde superconductors [Prozorov et al. (2010b)] however more studies are needed in order to clarify this.

  3. Optical XOR gate

    DOE Patents [OSTI]

    Vawter, G. Allen

    2013-11-12

    An optical XOR gate is formed as a photonic integrated circuit (PIC) from two sets of optical waveguide devices on a substrate, with each set of the optical waveguide devices including an electroabsorption modulator electrically connected in series with a waveguide photodetector. The optical XOR gate utilizes two digital optical inputs to generate an XOR function digital optical output. The optical XOR gate can be formed from III-V compound semiconductor layers which are epitaxially deposited on a III-V compound semiconductor substrate, and operates at a wavelength in the range of 0.8-2.0 .mu.m.

  4. Method and apparatus for welding precipitation hardenable materials

    DOE Patents [OSTI]

    Murray, Jr., Holt (Hopewell, NJ); Harris, Ian D. (Dublin, OH); Ratka, John O. (Cleveland Heights, OH); Spiegelberg, William D. (Parma, OH)

    1994-01-01

    A method for welding together members consisting of precipitation age hardened materials includes the steps of selecting a weld filler material that has substantially the same composition as the materials being joined, and an age hardening characteristic temperature age threshold below that of the aging kinetic temperature range of the materials being joined, whereby after welding the members together, the resulting weld and heat affected zone (HAZ) are heat treated at a temperature below that of the kinetic temperature range of the materials joined, for obtaining substantially the same mechanical characteristics for the weld and HAZ, as for the parent material of the members joined.

  5. Method and apparatus for welding precipitation hardenable materials

    DOE Patents [OSTI]

    Murray, H. Jr.; Harris, I.D.; Ratka, J.O.; Spiegelberg, W.D.

    1994-06-28

    A method for welding together members consisting of precipitation age hardened materials includes the steps of selecting a weld filler material that has substantially the same composition as the materials being joined, and an age hardening characteristic temperature age threshold below that of the aging kinetic temperature range of the materials being joined, whereby after welding the members together, the resulting weld and heat affected zone (HAZ) are heat treated at a temperature below that of the kinetic temperature range of the materials joined, for obtaining substantially the same mechanical characteristics for the weld and HAZ, as for the parent material of the members joined. 5 figures.

  6. Activation studies with promoted precipitated iron Fischer-Tropsch catalysts 

    E-Print Network [OSTI]

    Manne, Rama Krishna

    1991-01-01

    . 11&/258iOs) in fixed-bed reactors to complete the study initiated in this laboratory. Different reduction procedures ivere folloived in each test, namely Hs reduction at 2SO'C with a linear velocity of 150 cm/s and syngas (Hs/CO = 2:1) reduction... for Hs reduction compared to syngas reduction. Four tests ivere done in fixed-bed reactors ivith a promoted precipitated iron catalvst (100Fe/0. 3Cu/O. SII), prepared in our laboratory. Three different activation procedures were employed. Unlike ivith...

  7. Ultrathin Optical Panel And A Method Of Making An Ultrathin Optical Panel.

    DOE Patents [OSTI]

    Biscardi, Cyrus (Bellport, NY); Brewster, Calvin (North Patchoque, NY); DeSanto, Leonard (Patchoque, NY); Veligdan, James T. (Manorville, NY)

    2005-02-15

    An ultrathin optical panel, and a method of producing an ultrathin optical panel, are disclosed, including stacking a plurality of glass sheets, which sheets may be coated with a transparent cladding substance or may be uncoated, fastening together the plurality of stacked coated glass sheets using an epoxy or ultraviolet adhesive, applying uniform pressure to the stack, curing the stack, sawing the stack to form an inlet face on a side of the stack and an outlet face on an opposed side of the stack, bonding a coupler to the inlet face of the stack, and fastening the stack, having the coupler bonded thereto, within a rectangular housing having an open front which is aligned with the outlet face, the rectangular housing having therein a light generator which is optically aligned with the coupler. The light generator is preferably placed parallel to and proximate with the inlet face, thereby allowing for a reduction in the depth of the housing.

  8. Ultrathin optical panel and a method of making an ultrathin optical panel

    DOE Patents [OSTI]

    Biscardi, Cyrus (Bellport, NY); Brewster, Calvin (North Patchogue, NY); DeSanto, Leonard (Patchogue, NY); Veligdan, James T. (Manorville, NY)

    2002-01-01

    An ultrathin optical panel, and a method of producing an ultrathin optical panel, are disclosed, including stacking a plurality of glass sheets, which sheets may be coated With a transparent cladding substance or may be uncoated, fastening together the plurality of stacked coated glass sheets using an epoxy or ultraviolet adhesive, applying uniform pressure to the stack, curing the stack, sawing the stack to form an inlet face on a side of the stack and an outlet face on an opposed side of the stack, bonding a coupler to the inlet face of the stack, and fastening the stack, having the coupler bonded thereto, within a rectangular housing having an open front which is aligned with the outlet face, the rectangular housing having therein a light generator which is optically aligned with the coupler. The light generator is preferably placed parallel to and proximate with the inlet face, thereby allowing for a reduction in the depth of the housing.

  9. Ultrathin optical panel and a method of making an ultrathin optical panel

    DOE Patents [OSTI]

    Biscardi, Cyrus (Bellport, NY); Brewster, Calvin (North Patchogue, NY); DeSanto, Leonard (Patchogue, NY); Veligdan, James T. (Manorville, NY)

    2003-02-11

    An ultrathin optical panel, and a method of producing an ultrathin optical panel, are disclosed, including stacking a plurality of glass sheets, which sheets may be coated with a transparent cladding substance or may be uncoated, fastening together the plurality of stacked coated glass sheets using an epoxy or ultraviolet adhesive, applying uniform pressure to the stack, curing the stack, sawing the stack to form an inlet face on a side of the stack and an outlet face on an opposed side of the stack, bonding a coupler to the inlet face of the stack, and fastening the stack, having the coupler bonded thereto, within a rectangular housing having an open front which is aligned with the outlet face, the rectangular housing having therein a light generator which is optically aligned with the coupler. The light generator is preferably placed parallel to and proximate with the inlet face, thereby allowing for a reduction in the depth of the housing.

  10. Ultrathin optical panel and a method of making an ultrathin optical panel

    DOE Patents [OSTI]

    Biscardi, Cyrus (Bellport, NY); Brewster, Calvin (North Patchogue, NY); DeSanto, Leonard (Patchogue, NY); Veligdan, James T. (Manorville, NY)

    2001-10-09

    An ultrathin optical panel, and a method of producing an ultrathin optical panel, are disclosed, including stacking a plurality of glass sheets, which sheets may be coated with a transparent cladding substance or may be uncoated, fastening together the plurality of stacked coated glass sheets using an epoxy or ultraviolet adhesive, applying uniform pressure to the stack, curing the stack, sawing the stack to form an inlet face on a side of the stack and an outlet face on an opposed side of the stack, bonding a coupler to the inlet face of the stack, and fastening the stack, having the coupler bonded thereto, within a rectangular housing having an open front which is aligned with the outlet face, the rectangular housing having therein a light generator which is optically aligned with the coupler. The light generator is preferably placed parallel to and proximate with the inlet face, thereby allowing for a reduction in the depth of the housing.

  11. Ultrathin Optical Panel And A Method Of Making An Ultrathin Optical Panel.

    DOE Patents [OSTI]

    Biscardi, Cyrus (Bellport, NY); Brewster, Calvin (North Patchogue, NY); DeSanto, Leonard (Patchogue, NY); Veligdan, James T. (Manorville, NY)

    2005-05-17

    An ultrathin optical panel, and a method of producing an ultrathin optical panel, are disclosed, including stacking a plurality of glass sheets, which sheets may be coated with a transparent cladding substance or may be uncoated, fastening together the plurality of stacked coated glass sheets using an epoxy or ultraviolet adhesive, applying uniform pressure to the stack, curing the stack, sawing the stack to form an inlet face on a side of the stack and an outlet face on an opposed side of the stack, bonding a coupler to the inlet face of the stack, and fastening the stack, having the coupler bonded thereto, within a rectangular housing having an open front which is aligned with the outlet face, the rectangular housing having therein a light generator which is optically aligned with the coupler. The light generator is preferably placed parallel to and proximate with the inlet face, thereby allowing for a reduction in the depth of the housing.

  12. Optical characterization of gaps in directly bonded Si compound optics using infrared spectroscopy

    E-Print Network [OSTI]

    Gully-Santiago, Michael; White, Victor

    2015-01-01

    Silicon direct bonding offers flexibility in the design and development of Si optics by allowing manufacturers to combine subcomponents with a potentially lossless and mechanically stable interface. The bonding process presents challenges in meeting the requirements for optical performance because air gaps at the Si interface cause large Fresnel reflections. Even small (35 nm) gaps reduce transmission through a direct bonded Si compound optic by 4% at $\\lambda = 1.25 \\; \\mu$m at normal incidence. We describe a bond inspection method that makes use of precision slit spectroscopy to detect and measure gaps as small as 14 nm. Our method compares low finesse Fabry-P\\'{e}rot models to high precision measurements of transmission as a function of wavelength. We demonstrate the validity of the approach by measuring bond gaps of known depths produced by microlithography.

  13. Vertically Loaded Anchor: Drag Coefficient, Fall Velocity, and Penetration Depth using Laboratory Measurements 

    E-Print Network [OSTI]

    Cenac, William

    2011-08-08

    The offshore oilfield industry is continuously developing unique and break-through technologies and systems to extract hydrocarbons from ever increasing ocean depths. Due to the extreme depths being explored presently, large anchors are being...

  14. A Convex Hull Peeling Depth Approach to Nonparametric Massive Multivariate Data

    E-Print Network [OSTI]

    Wolfe, Patrick J.

    A Convex Hull Peeling Depth Approach to Nonparametric Massive Multivariate Data Analysis) and Multivariate Data Analysis Definitions on CHP Data Depth (Ordering Multivariate Data) Quantiles and Density with CHP Multivariate Median Skewness and Kurtosis of a Multivariate Distribution Outlier Detection

  15. Seismic evidence for thermal runaway during intermediate-depth earthquake rupture

    E-Print Network [OSTI]

    Barrett, Sarah A.

    Intermediate-depth earthquakes occur at depths where temperatures and pressures exceed those at which brittle failure is expected. There are two leading candidates for the physical mechanism behind these earthquakes: ...

  16. Control Systems Cyber Security: Defense-in-Depth Strategies

    SciTech Connect (OSTI)

    Mark Fabro

    2007-10-01

    Information infrastructures across many public and private domains share several common attributes regarding IT deployments and data communications. This is particularly true in the control systems domain. A majority of the systems use robust architectures to enhance business and reduce costs by increasing the integration of external, business, and control system networks. However, multi-network integration strategies often lead to vulnerabilities that greatly reduce the security of an organization, and can expose mission-critical control systems to cyber threats. This document provides guidance and direction for developing ‘defense-in-depth’ strategies for organizations that use control system networks while maintaining a multi-tier information architecture that requires: • Maintenance of various field devices, telemetry collection, and/or industrial-level process systems • Access to facilities via remote data link or modem • Public facing services for customer or corporate operations • A robust business environment that requires connections among the control system domain, the external Internet, and other peer organizations.

  17. Control Systems Cyber Security:Defense in Depth Strategies

    SciTech Connect (OSTI)

    David Kuipers; Mark Fabro

    2006-05-01

    Information infrastructures across many public and private domains share several common attributes regarding IT deployments and data communications. This is particularly true in the control systems domain. A majority of the systems use robust architectures to enhance business and reduce costs by increasing the integration of external, business, and control system networks. However, multi-network integration strategies often lead to vulnerabilities that greatly reduce the security of an organization, and can expose mission-critical control systems to cyber threats. This document provides guidance and direction for developing ‘defense-in-depth’ strategies for organizations that use control system networks while maintaining a multi-tier information architecture that requires: Maintenance of various field devices, telemetry collection, and/or industrial-level process systems Access to facilities via remote data link or modem Public facing services for customer or corporate operations A robust business environment that requires connections among the control system domain, the external Internet, and other peer organizations.

  18. The development of precipitated iron catalysts with improved stability

    SciTech Connect (OSTI)

    Not Available

    1990-01-01

    The goal of this program is to identify the chemical principles governing the deactivation of precipitated iron catalysts during Fischer-Tropsch synthesis and to use these chemical principles in the design of catalysts suitable for slurry reactors. This report covers testing an iron catalyst. During the last quarter, a new precipitated iron catalyst was prepared and tested in the slurry autoclave reactor at various conditions. This catalyst did not noticeably deactivate during 1250 hours of testing. This quarter, the test was extended to include performance evaluations at different conversion levels ranging from 35 to 88% at 265 and 275{degree}C. The conversion levels were varied by changing the feed rate. The catalytic performance at different conversion intervals was then integrated to approximately predict performance in a bubble column reactor. The run was shut down at the end of 1996 hours because of a 24-hour-power outage. When the power was back on, the run was restarted from room temperature. Catalytic performance during the first 300 hours after the restart-up was monitored. Overall product distributions are being tabulated as analytical laboratory data are obtained. 34 figs., 3 tabs.

  19. EPRICON: Agentless flue gas conditioning for electrostatic precipitators

    SciTech Connect (OSTI)

    Bibbo, P.P. [Research-Cottrell, Inc., Branchburg, NJ (United States)

    1995-09-01

    Achieving efficient particulate control in coal burning electric utility plants is becoming an increasingly difficult proposition, giver, the variety of regulatory, technical, operating and environmental pressures that exist in the US. For most powerplants, particulate control is achieved by an electrostatic precipitator (ESP). Under optimal conditions, modern ESPs are capable of achieving particulate removal efficiencies of 99.7 %. Unfortunately, optimal conditions are not always present. ESP`s are sensitive to flue gas conditions, and those conditions may change dramatically after a fuel switch or the installation of some types of emissions control technology upstream of the ESP. Gas conditioning has been shown to be an effective means of returning flue gas to the ``optimal`` conditions required for efficient ESP operation following a fuel switch to a low, or at least, lower sulfur coal. Borrowing technology common in conventional soap-making plants around the turn of the century, sulfur-burning SO3 gas conditioning has been the solution to may difficult fuels in electrostatic precipitators. Although it has contributed most to improved ESP performance after a fuel switch, conventional gas conditioning has significant drawbacks. In an effort to develop an alternative to conventional SO{sub 3} gas conditioning, the Electric Power Research Institute (EPRI) initiated a research and development project that has produced an alternative and modem technology for flue gas conditioning, now called EPRICON, and licensed it to Research-Cottrell. This article describes the EPRICON process and its performance in pilot and demonstration plants.

  20. Gamma-ray irradiated polymer optical waveguides

    SciTech Connect (OSTI)

    Lai, C.-C.; Wei, T.-Y.; Chang, C.-Y.; Wang, W.-S.; Wei, Y.-Y.

    2008-01-14

    Optical waveguides fabricated by gamma-ray irradiation on polymer through a gold mask are presented. The gamma-ray induced index change is found almost linearly dependent on the dose of the irradiation. And the measured propagation losses are low enough for practical application. Due to the high penetrability of gamma ray, uniform refractive index change in depth can be easily achieved. Moreover, due to large-area printing, the uniformity of waveguide made by gamma-ray irradiation is much better than that by e-beam direct writing.

  1. Magnetospherically driven optical and radio aurorae at the end of the stellar main sequence

    E-Print Network [OSTI]

    Hallinan, G; Cotter, G; Bourke, S; Harding, L K; Pineda, J S; Butler, R P; Golden, A; Basri, G; Doyle, J G; Kao, M M; Berdyugina, S V; Kuznetsov, A; Rupen, M P; Antonova, A

    2015-01-01

    Aurorae are detected from all the magnetized planets in our Solar System, including Earth. They are powered by magnetospheric current systems that lead to the precipitation of energetic electrons into the high-latitude regions of the upper atmosphere. In the case of the gas-giant planets, these aurorae include highly polarized radio emission at kilohertz and megahertz frequencies produced by the precipitating electrons, as well as continuum and line emission in the infrared, optical, ultraviolet and X-ray parts of the spectrum, associated with the collisional excitation and heating of the hydrogen-dominated atmosphere. Here we report simultaneous radio and optical spectroscopic observations of an object at the end of the stellar main sequence, located right at the boundary between stars and brown dwarfs, from which we have detected radio and optical auroral emissions both powered by magnetospheric currents. Whereas the magnetic activity of stars like our Sun is powered by processes that occur in their lower a...

  2. Kirchhoff prestack depth migration in orthorhombic velocity models with differently rotated tensors

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Kirchhoff prestack depth migration in orthorhombic velocity models with differently rotated tensors use the ray-based Kirchhoff prestack depth migration to calculate migrated sections in simple with a differently rotated tensor of elastic moduli. We apply the Kirchhoff prestack depth migration to single

  3. Kirchhoff prestack depth migration in 3-D models: Comparison of triclinic anisotropy

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Kirchhoff prestack depth migration in 3-D models: Comparison of triclinic anisotropy with simpler the Kirchhoff prestack depth migration to the calculation of migrated sections in 3-D simple anisotropic. We test Kirchhoff prestack depth migration in velocity models with different types of anisotropy

  4. Depth-domain processing of teleseismic receiver functions and generalized three-dimensional imaging

    E-Print Network [OSTI]

    Dueker, Ken

    by itself or as a part of depth migration, is usually used for noise suppression in teleseismic receiver generalize the pre-stack depth migration methodology by introducing numerous signal-enhancement schemes could be superior to record summation used in conventional depth migration. #12;3 Introduction

  5. Gaussian packet prestack depth migration Department of Geophysics, Faculty of Mathematics and Physics, Charles University,

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Gaussian packet prestack depth migration Karel #20; Z#19;a#20;cek Department of Geophysics, Faculty depth migration. The main advantage of our method over the methods based on Gaussian beams is a direct. Thus, the Gaussian packet prestack depth migration is especially suitable for a target-oriented imaging

  6. Kirchhoff prestack depth migration in velocity models with and without rotation of the tensor of

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Kirchhoff prestack depth migration in velocity models with and without rotation of the tensor the Kirchhoff prestack depth migration to calculate migrated images in simple anisotropic homogeneous velocity of the tensor of elastic moduli. We apply the Kirchhoff prestack depth migration to correct single

  7. Kirchhoff prestack depth migration in velocity models with and without vertical gradients

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Kirchhoff prestack depth migration in velocity models with and without vertical gradients-mail: bucha@seis.karlov.mff.cuni.cz Summary The Kirchhoff prestack depth migration is used to calculate. The bottom layer is isotropic and homogeneous. We apply the Kirchhoff prestack depth migration to both

  8. Kirchhoff prestack depth migration in velocity models with and without rotation of the tensor of

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Kirchhoff prestack depth migration in velocity models with and without rotation of the tensor-mail: bucha@seis.karlov.mff.cuni.cz Summary We use the Kirchhoff prestack depth migration to calculate is limited to P-waves. Keywords 3-D Kirchhoff prestack depth migration, anisotropic velocity model, rotation

  9. Kirchhoff prestack depth migration in triclinic velocity models with differently rotated tensors

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Kirchhoff prestack depth migration in triclinic velocity models with differently rotated tensors use the Kirchhoff prestack depth migration to calculate migrated sections in simple anisotropic rotations of the tensor of elastic moduli. We apply the Kirchhoff prestack depth migration to single- layer

  10. Gaussian packet pre--stack depth migration the Marmousi data Karel Zacek*, Department Geophysics, Faculty

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Gaussian packet pre--stack depth migration the Marmousi data Karel Zacek*, Department Geophysics--stack depth migration. method on Marmousi data (Versteeg & 1991). advantage over methods Gaussian beams. Thus, Gaussian packet pre--stack depth migration is especially suitable target--oriented imaging

  11. Gaussian packet prestack depth migration. Part 3: Simple 2-D models

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Gaussian packet prestack depth migration. Part 3: Simple 2-D models V#19;aclav Bucha Department Republic, E-mail: bucha@seis.karlov.m#11;.cuni.cz Summary Gaussian packet prestack depth migration is used. Keywords Gaussian packets, Gaussian beams, prestack depth migration, Gabor transform, 2-D velocity model

  12. Kirchhoff prestack depth migration in velocity models with and without gradients: Comparison

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Kirchhoff prestack depth migration in velocity models with and without gradients: Comparison@seis.karlov.mff.cuni.cz Summary We use the Kirchhoff prestack depth migration to calculate migrated sections in simple anisotropic is isotropic and homogeneous. We apply the Kirchhoff prestack depth migration to both heterogeneous

  13. Depths, migration rates and environmental associations of acoustic scattering layers in the Gulf of California

    E-Print Network [OSTI]

    Benoit-Bird, Kelly J.

    Depths, migration rates and environmental associations of acoustic scattering layers in the Gulf-surface layer with mean daytime bottom depth of 43740 m (night: 61738 m), and a main migrating layer with mean bottom depth of 333776 m (night: 54727 m). Diel vertical migration rates for dusk ascents reached

  14. EVALUATION OF ULTRASONIC SNOW DEPTH SENSORS FOR AUTOMATED SURFACE OBSERVING SYSTEMS (ASOS)

    E-Print Network [OSTI]

    i THESIS EVALUATION OF ULTRASONIC SNOW DEPTH SENSORS FOR AUTOMATED SURFACE OBSERVING SYSTEMS (ASOS PREPARED UNDER OUR SUPERVISION BY WENDY ANN BRAZENEC ENTITLED EVALUATION OF ULTRASONIC SNOW DEPTH SENSORS;iii ABSTRACT OF THESIS EVALUATION OF ULTRASONIC SNOW DEPTH SENSORS FOR AUTOMATED SURFACE OBSERVING

  15. Modeling soil depth from topographic and land cover attributes Teklu K. Tesfa,1

    E-Print Network [OSTI]

    Tarboton, David

    Modeling soil depth from topographic and land cover attributes Teklu K. Tesfa,1 David G. Tarboton,1 June 2009; published 29 October 2009. [1] Soil depth is an important input parameter in hydrological and ecological modeling. Presently, the soil depth data available in national soil databases (STATSGO and SSURGO

  16. Impacts of Shortwave Penetration Depth on Large-Scale Ocean Circulation and Heat Transport

    E-Print Network [OSTI]

    Gnanadesikan, Anand

    Impacts of Shortwave Penetration Depth on Large-Scale Ocean Circulation and Heat Transport COLM independent parameter- izations that use ocean color to estimate the penetration depth of shortwave radiation. This study offers a way to evaluate the changes in irradiance penetration depths in coupled ocean

  17. Precipitation of auroral protons in detached arcs Thomas J. Immel, Stephen B. Mende, Harald U. Frey, Laura M. Peticolas,

    E-Print Network [OSTI]

    California at Berkeley, University of

    Precipitation of auroral protons in detached arcs Thomas J. Immel, Stephen B. Mende, Harald U. Frey of particle precipitation at sub-auroral latitudes on the dayside. The signature of this precipitation is seen conjunction with the FAST satellite demonstrates the presence of precipitating protons and the notable absence

  18. Materials Science and Engineering A 460461 (2007) 7785 The effect of severe plastic deformation on precipitation in

    E-Print Network [OSTI]

    Gubicza, Jenő

    2007-01-01

    on precipitation in supersaturated Al­Zn­Mg alloys J. Gubiczaa,, I. Schillera, N.Q. Chinha, J. Illya, Z. Horitab, T the influence of equal-channel angular pressing (ECAP) on the development of precipitation microstruc- tures with finely dispersed precipitates. It is concluded that processing by ECAP promotes the precipitation

  19. Latching micro optical switch

    DOE Patents [OSTI]

    Garcia, Ernest J; Polosky, Marc A

    2013-05-21

    An optical switch reliably maintains its on or off state even when subjected to environments where the switch is bumped or otherwise moved. In addition, the optical switch maintains its on or off state indefinitely without requiring external power. External power is used only to transition the switch from one state to the other. The optical switch is configured with a fixed optical fiber and a movable optical fiber. The movable optical fiber is guided by various actuators in conjunction with a latching mechanism that configure the switch in one position that corresponds to the on state and in another position that corresponds to the off state.

  20. Aqueous precipitation: Population balance modeling and control in multi-cation systems

    SciTech Connect (OSTI)

    Voigt, J.A.

    1996-03-01

    Efficient separation of metal species from aqueous streams by precipitation techniques requires a fundamental understanding of the processes that occur during precipitation. These processes include particle nucleation, particle growth by solute deposition, agglomerate formation, and agglomerate breakup. Population balance method has been used to develop a kinetic model that accounts for these competing kinetic processes. The usefulness of the model is illustrated through its application to precipitation of yttrium hydroxynitrate, YHN. Kinetic parameters calculated from the model equations and system-specific solution chemistry are used to describe several aspects of the effect of pH on YHN precipitation. Implications for simultaneous precipitation of more than one cation type are discussed with examples. Effects of solution chemistry, precipitator design, and solvent choice are considered.

  1. Active optical zoom system

    DOE Patents [OSTI]

    Wick, David V.

    2005-12-20

    An active optical zoom system changes the magnification (or effective focal length) of an optical imaging system by utilizing two or more active optics in a conventional optical system. The system can create relatively large changes in system magnification with very small changes in the focal lengths of individual active elements by leveraging the optical power of the conventional optical elements (e.g., passive lenses and mirrors) surrounding the active optics. The active optics serve primarily as variable focal-length lenses or mirrors, although adding other aberrations enables increased utility. The active optics can either be LC SLMs, used in a transmissive optical zoom system, or DMs, used in a reflective optical zoom system. By appropriately designing the optical system, the variable focal-length lenses or mirrors can provide the flexibility necessary to change the overall system focal length (i.e., effective focal length), and therefore magnification, that is normally accomplished with mechanical motion in conventional zoom lenses. The active optics can provide additional flexibility by allowing magnification to occur anywhere within the FOV of the system, not just on-axis as in a conventional system.

  2. Method of precipitating uranium from an aqueous solution and/or sediment

    DOE Patents [OSTI]

    Tokunaga, Tetsu K; Kim, Yongman; Wan, Jiamin

    2013-08-20

    A method for precipitating uranium from an aqueous solution and/or sediment comprising uranium and/or vanadium is presented. The method includes precipitating uranium as a uranyl vanadate through mixing an aqueous solution and/or sediment comprising uranium and/or vanadium and a solution comprising a monovalent or divalent cation to form the corresponding cation uranyl vanadate precipitate. The method also provides a pathway for extraction of uranium and vanadium from an aqueous solution and/or sediment.

  3. Complex motion of precipitation bands Istvan Lagzi a,*, Peter Papai b

    E-Print Network [OSTI]

    Rácz, Zoltán

    Complex motion of precipitation bands Istva´n Lagzi a,*, Pe´ter Pa´pai b , Zolta´n Ra´cz b and dynamics of an Al(OH)3 precipitation ring is studied by diffusing NaOH into a gel containing AlCl3. Limited stopping and reversal of the direction of motion of the precipitation ring, and evolution into stationary

  4. Apparatus for preventing particle deposition from process streams on optical access windows

    DOE Patents [OSTI]

    Logan, Ronald G. (Fredericksburg, VA); Grimm, Ulrich (Morgantown, WV)

    1993-01-01

    An electrostatic precipitator is disposed inside and around the periphery of the window of a viewing port communicating with a housing through which a particle-laden gas stream is being passed. The precipitator includes a pair of electrodes around the periphery of the window, spaced apart and connected to a unidirectional voltage source. Application of high voltage from the source to the electrodes causes air molecules in the gas stream to become ionized, attaching to solid particles and causing them to be deposited on a collector electrode. This prevents the particles from being deposited on the window and keeps the window clean for viewing and making optical measurements.

  5. Active Optics in Modern, Large Optical Telescopes

    E-Print Network [OSTI]

    Lothar Noethe

    2001-11-07

    Active optics is defined as the control of the shape and the alignment of the components of an optical system at low temporal frequencies. For modern large telescopes with flexible monolithic or segmented primary mirrors and also flexible structures this technique is indispensable to reach a performance which is either diffraction limited for an operation in space or limited by the atmosphere for an operation on the ground. This article first describes the theory of active optics, both of the wavefront analysis and the correction mechanisms, then the design of three representative active optics systems, two in telescopes of the four and eight meter class with meniscus mirrors and one in a telescope with a segmented primary mirror, and, finally, presents practical experience with these active optics systems.

  6. LABORATORY VII: WAVE OPTICS

    E-Print Network [OSTI]

    Minnesota, University of

    LABORATORY VII: WAVE OPTICS Lab VII - 1 In this lab, you will solve problems in ways that take-like behavior. These conditions may be less familiar to you than the conditions for which geometrical optics

  7. High bandwidth optical mount

    DOE Patents [OSTI]

    Bender, D.A.; Kuklo, T.

    1994-11-08

    An optical mount, which directs a laser beam to a point by controlling the position of a light-transmitting optic, is stiffened so that a lowest resonant frequency of the mount is approximately one kilohertz. The optical mount, which is cylindrically-shaped, positions the optic by individually moving a plurality of carriages which are positioned longitudinally within a sidewall of the mount. The optical mount is stiffened by allowing each carriage, which is attached to the optic, to move only in a direction which is substantially parallel to a center axis of the optic. The carriage is limited to an axial movement by flexures or linear bearings which connect the carriage to the mount. The carriage is moved by a piezoelectric transducer. By limiting the carriage to axial movement, the optic can be kinematically clamped to a carriage. 5 figs.

  8. Trends of extreme precipitation in eastern China and their possible causes

    E-Print Network [OSTI]

    2015-01-01

    eastern China un- der global warming. Plateau Meteorology,PRECIPITATION, AEROSOLS, AND GLOBAL WARMING ence, 314, 1442–logical cycle to global warming. J. Climate, 19, 5686–5699,

  9. Aqueous uranium(IV) concentrations controlled by calcium uranyl vanadate precipitates

    E-Print Network [OSTI]

    Tokunaga, T.K.

    2014-01-01

    through potassium uranyl vanadate precipitation. Environ.of selected natural uranyl vanadates. Vib. Spectrosc. 2005,sodium and cesium on uranyl oxide hydrate solubility.

  10. Study of Nano-Precipitates Using Small-Angle Neutron Scattering

    SciTech Connect (OSTI)

    Chen, Wei-Ren [ORNL

    2008-01-01

    Small-Angle-Neutron-Scattering (SANS) experiments were performed on a Ni-based nano-precipitate strengthened superalloy. A theoretical model for SANS absolute intensity distribution, I(Q), was developed to extract the structural properties. During the deformation process, a change in the morphology of precipitates was discovered. However, the average inter-precipitate distance and the average volume of precipitate were found to remain invariant. This microstructural information resolved by SANS is in good agreement with the results obtained from the quantitative transmission-electron-microscopy (TEM) image analysis.

  11. Evaluation of Global Monsoon Precipitation Changes based on Five Reanalysis Datasets

    SciTech Connect (OSTI)

    Lin, Renping; Zhou, Tianjun; Qian, Yun

    2014-02-01

    With the motivation to identify whether or not a reasonably simulated atmospheric circulation would necessarily lead to a successful reproduction of monsoon precipitation, the performances of five sets of reanalysis data (NCEP2, ERA40, JRA25, ERA-Interim and MERRA) in reproducing the climatology, interannual variation and long-term trend of global monsoon (GM) precipitation are comprehensively evaluated. In order to better understand the variability and long-term trend of GM precipitation, we also examined the major components of water budget, including evaporation, water vapor convergence and the change in local water vapor storage, based on five reanalysis datasets. The results show that all five reanalysis data reasonably reproduce the climatology of GM precipitation. The ERA-Interim (NCEP2) shows the highest (lowest) skill among the five datasets. The observed GM precipitation shows an increasing tendency during 1979-2001 along with a strong interannual variability, which is reasonably reproduced by the five sets of reanalysis data. The observed increasing trend of GM precipitation is dominated by the contribution from the North African, North American and Australian monsoons. All five data fail in reproducing the increasing tendency of North African monsoon precipitation. The wind convergence term in water budget equation dominate the GM precipitation variation, indicating a consistency between the GM precipitation and the seasonal change of prevailing wind.

  12. On the reconstruction of seasonal oceanic precipitation in the presatellite era

    E-Print Network [OSTI]

    Washington, Richard

    satellites and the processing of data from dedicated sensors (operating at infrared and microwave wavelengths have evaluated the capabilities and limitations of reconstructing oceanic precipitation using land

  13. Supplementary Information for: Electrochemical struvite precipitation from digestate with a fluidized bed

    E-Print Network [OSTI]

    Supplementary Information for: Electrochemical struvite precipitation from digestate for a) magnesium, b) phosphate, c) calcium and d) ammonium for the influent digestate as a function

  14. Precipitation in a Cu–Cr–Zr–Mg alloy during aging

    SciTech Connect (OSTI)

    Cheng, J.Y. Shen, B.; Yu, F.X.

    2013-07-15

    The precipitation processes in a Cu-0.69Cr-0.10Zr-0.02Mg alloy aged at 450 °C and 550 °C have been investigated by transmission electron microscopy and high resolution transmission electron microscopy. The precipitation sequence in this alloy aged at 450 °C is: supersaturated solid solution ? Guinier–Preston zone (fcc Cr-rich phase) ? ordered fcc Cr-rich phase ? ordered bcc Cr-rich phase. The precipitation sequence in this alloy aged at 550 °C is: supersaturated solid solution ? ordered fcc Cr-rich phase ? ordered bcc Cr-rich phase. In the evolution of decomposition, the orientation relationship between the precipitates and the Cu matrix changes from cube-on-cube to Nishiyama–Wassermann orientation. The ordering of Cr-rich precipitates facilitates the formation of the bcc precipitates and promotes the development of Nishiyama–Wassermann orientation. - Highlights: • Two different precipitation sequences in the Cu–Cr–Zr–Mg alloy are proposed. • The changes in orientation relationship of the precipitates are presented. • The roles of ordering and coherent interface of the precipitates are discussed.

  15. Impacts of precipitation seasonality and ecosystem types on evapotranspiration in the Yukon River Basin, Alaska

    E-Print Network [OSTI]

    Yuan, Wenping; Liu, Shuguang; Liu, Heping; Randerson, James T; Yu, Guirui; Tieszen, Larry L

    2010-01-01

    of shoot water potential and vapor pressure difference, Treeterm average. [ 24 ] The vapor pressure deficit (VPD) wasb) precipitation, (c) vapor pressure deficit (VPD), and (d)

  16. Method and means for continuous precipitation of easy-dry, granular uranium peroxide

    DOE Patents [OSTI]

    Cahill, Allen E. (Roland, IA); Burkhart, deceased, Lawrence E. (late of Ames, IA)

    1992-02-28

    A method and means for continuous precipitation of granular uranium peroxide. The reaction vessel and agitation method practiced in it avoid filter plugging and caking problems.

  17. Recovery of carboxylic acids from water by precipitation from organic solutions

    DOE Patents [OSTI]

    King, C. Judson (Kensington, CA); Starr, John (Albany, CA)

    1992-01-01

    Carboxylic acids are recovered from wet organic solutions by reducing the solutions' water content thus causing the acids to precipitate as recoverable crystals.

  18. Investigations in Southeast Texas Precipitating Storms: Modeled and Observed Characteristics, Model Sensitivities, and Educational Benefits 

    E-Print Network [OSTI]

    Hopper, Larry

    2012-02-14

    This dissertation establishes a precipitation climatology for common storm types and structures in southeast Texas, investigating diurnal, seasonal, and interannual rainfall variations in addition to climatological differences ...

  19. Eutectic precipitation of melt quenched titanium-silicon-neodymium alloy

    SciTech Connect (OSTI)

    Li, G.P.; Liu, Y.Y.; Li, D.; Hu, Z.Q. . Inst. of Metal Research)

    1995-01-15

    Titanium based metallic glasses have attracted keen interest because of the promise of industrial applications owing to their improves corrosion resistance, better mechanical properties, occurrence of superconductivity and superior magnetic properties. The titanium alloy systems where metallic glass has been obtained include Ti-Cu, Ti-Be, Ti-Si, Ti-B. Polk et al. had reported that they were able to produce an amorphous phase in binary Ti[sub 80]Si[sub 20] alloy system by using an arc-melting piston and anvil apparatus. In the present study, the authors have investigated the effect of adding rare earth element Nd on eutective precipitation of the amorphous Ti[sub 80]Si[sub 20] alloy and the orientation relationship which exists between the [beta]-Ti and Ti[sub 5]Si[sub 3].

  20. The Dynamics of Platinum Precipitation in an Ion Exchange Membrane

    E-Print Network [OSTI]

    Burlatsky, S F; Atrazhev, V V; Dmitriev, D V; Kuzminyh, N Y; Erikhman, N S

    2013-01-01

    Microscopy of polymer electrolyte membranes that have undergone operation under fuel cell conditions, have revealed a well defined band of platinum in the membrane. Here, we propose a physics based model that captures the mechanism of platinum precipitation in the polymer electrolyte membrane. While platinum is observed throughout the membrane, the preferential growth of platinum at the band of platinum is dependent on the electrochemical potential distribution in the membrane. In this paper, the location of the platinum band is calculated as a function of the gas concentration at the cathode and anode, gas diffusion coefficients and solubility constants of the gases in the membrane, which are functions of relative humidity. Under H2/N2 conditions the platinum band is located near the cathode-membrane interface, as the oxygen concentration in the cathode gas stream increases and/or the hydrogen concentration in the anode gas stream decreases, the band moves towards the anode. The model developed in this paper...

  1. Reflective optical imaging system

    DOE Patents [OSTI]

    Shafer, David R. (Fairfield, CT)

    2000-01-01

    An optical system compatible with short wavelength (extreme ultraviolet) radiation comprising four reflective elements for projecting a mask image onto a substrate. The four optical elements are characterized in order from object to image as convex, concave, convex and concave mirrors. The optical system is particularly suited for step and scan lithography methods. The invention increases the slit dimensions associated with ringfield scanning optics, improves wafer throughput and allows higher semiconductor device density.

  2. Optical voltage reference

    DOE Patents [OSTI]

    Rankin, R.; Kotter, D.

    1994-04-26

    An optical voltage reference for providing an alternative to a battery source is described. The optical reference apparatus provides a temperature stable, high precision, isolated voltage reference through the use of optical isolation techniques to eliminate current and impedance coupling errors. Pulse rate frequency modulation is employed to eliminate errors in the optical transmission link while phase-lock feedback is employed to stabilize the frequency to voltage transfer function. 2 figures.

  3. Optical voltage reference

    DOE Patents [OSTI]

    Rankin, Richard (Ammon, ID); Kotter, Dale (Bingham County, ID)

    1994-01-01

    An optical voltage reference for providing an alternative to a battery source. The optical reference apparatus provides a temperature stable, high precision, isolated voltage reference through the use of optical isolation techniques to eliminate current and impedance coupling errors. Pulse rate frequency modulation is employed to eliminate errors in the optical transmission link while phase-lock feedback is employed to stabilize the frequency to voltage transfer function.

  4. Optical films for solar energy applications

    SciTech Connect (OSTI)

    Lampert, C.M.

    1983-05-01

    A number of solar energy conversion materials and coatings are considered stratified media. They are generally classified as graded-index media or layered media. With index coatings, two components (such as air and SiO/sub 2/ or Cr and Cr/sub 2/O/sub 3/) are created in a non-linear fashion with depth into the coating. By simple materials admixing, a coating is formed with varying optical constants (n, k). Layered media generally consist of interference films, films with thicknesses below the wavelength of light, made of alternating dissimilar media such as a dielectric and metal combination. This paper presents details of the properties of stratified coatings. Coatings that serve as antireflection films, transparent optical insulation (silica aerogel), thermal heat mirrors, or selective absorbers are also discussed. Both interference and semiconductor types of heat mirrors are evaluated. Four types of selective absorbers are also covered: dendritic optical trapping, graded composite, metal/dielectric tandems, and optical interference techniques.

  5. University of Central Florida College of Optics & Photonics Optics

    E-Print Network [OSTI]

    Van Stryland, Eric

    University of Central Florida College of Optics & Photonics Optics Spring 2010 OSE-6432: Principles of guided wave optics; electro -optics, acousto-optics and optoelectronics. Location: CREOL-A-214 or by Appointment Reference Materials: 1. Class Notes. 2. "Fundamentals of Optical Waveguides", K. Okamoto, Academic

  6. INSTITUTE OF PHYSICS PUBLISHING JOURNAL OF OPTICS A: PURE AND APPLIED OPTICS Nanostructures + Light = `New Optics'

    E-Print Network [OSTI]

    Zheludev, Nikolay

    INSTITUTE OF PHYSICS PUBLISHING JOURNAL OF OPTICS A: PURE AND APPLIED OPTICS EDITORIAL Nanostructures + Light = `New Optics' Guest Editors Nikolay Zheludev University of Southampton, UK Vladimir optics and classical electrodynamics became fashionable again. Fields that several generations

  7. Fiber optic vibration sensor

    DOE Patents [OSTI]

    Dooley, Joseph B. (Harriman, TN); Muhs, Jeffrey D. (Lenoir City, TN); Tobin, Kenneth W. (Harriman, TN)

    1995-01-01

    A fiber optic vibration sensor utilizes two single mode optical fibers supported by a housing with one optical fiber fixedly secured to the housing and providing a reference signal and the other optical fiber having a free span length subject to vibrational displacement thereof with respect to the housing and the first optical fiber for providing a signal indicative of a measurement of any perturbation of the sensor. Damping or tailoring of the sensor to be responsive to selected levels of perturbation is provided by altering the diameter of optical fibers or by immersing at least a portion of the free span length of the vibration sensing optical fiber into a liquid of a selected viscosity.

  8. Fiber optic vibration sensor

    DOE Patents [OSTI]

    Dooley, J.B.; Muhs, J.D.; Tobin, K.W.

    1995-01-10

    A fiber optic vibration sensor utilizes two single mode optical fibers supported by a housing with one optical fiber fixedly secured to the housing and providing a reference signal and the other optical fiber having a free span length subject to vibrational displacement thereof with respect to the housing and the first optical fiber for providing a signal indicative of a measurement of any perturbation of the sensor. Damping or tailoring of the sensor to be responsive to selected levels of perturbation is provided by altering the diameter of optical fibers or by immersing at least a portion of the free span length of the vibration sensing optical fiber into a liquid of a selected viscosity. 2 figures.

  9. Omnidirectional fiber optic tiltmeter

    DOE Patents [OSTI]

    Benjamin, B.C.; Miller, H.M.

    1983-06-30

    A tiltmeter is provided which is useful in detecting very small movements such as earth tides. The device comprises a single optical fiber, and an associated weight affixed thereto, suspended from a support to form a pendulum. A light source, e.g., a light emitting diode, mounted on the support transmits light through the optical fiber to a group of further optical fibers located adjacent to but spaced from the free end of the single optical fiber so that displacement of the single optical fiber with respect to the group will result in a change in the amount of light received by the individual optical fibers of the group. Photodetectors individually connectd to the fibers produce corresponding electrical outputs which are differentially compared and processed to produce a resultant continuous analog output representative of the amount and direction of displacement of the single optical fiber.

  10. Detection-attribution of global warming at the regional scale: How to deal with precipitation variability?

    E-Print Network [OSTI]

    Detection-attribution of global warming at the regional scale: How to deal with precipitation record over recent decades. Citation: Douville, H. (2006), Detection-attribution of global warming at recent climate scenarios, Douville et al. [2005] showed that the precipitation response to global warming

  11. U.S.DOE Global Monthly Station Temperature and Precipitation, 1738-1980

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

    The global monthly station temperature and precipitation data from the U.S. Department of Energy, a dataset hosted at, covers the time period from January, 1738 to December, 1980. The air temperature and precipitation levels are platform observations from ground and water surfaces. The data are maintained in the Research Data Archive at the National Center for Atmospheric Research.

  12. Increase of global monsoon area and precipitation under global warming: A robust signal?

    E-Print Network [OSTI]

    Li, Tim

    Increase of global monsoon area and precipitation under global warming: A robust signal? Pang future sea surface temperature (SST) warming patterns. The results show that the global monsoon area. Zhao (2012), Increase of global monsoon area and precipitation under global warming: A robust signal

  13. G-Band Vapor Radiometer Precipitable Water Vapor (GVRPWV) Value-Added Product

    SciTech Connect (OSTI)

    Koontz, A; Cadeddu, M

    2012-12-05

    The G-Band Vapor Radiometer Precipitable Water Vapor (GVRPWV) value-added product (VAP) computes precipitable water vapor using neural network techniques from data measured by the GVR. The GVR reports time-series measurements of brightness temperatures for four channels located at 183.3 ± 1, 3, 7, and 14 GHz.

  14. Linear Friction Welding Process Model for Carpenter Custom 465 Precipitation-Hardened Martensitic

    E-Print Network [OSTI]

    Grujicic, Mica

    for Carpenter Custom 465 precipitation-hardened martensitic stainless steel to develop a linear friction weldingLinear Friction Welding Process Model for Carpenter Custom 465 Precipitation-Hardened Martensitic Stainless Steel M. Grujicic, R. Yavari, J.S. Snipes, S. Ramaswami, C.-F. Yen, and B.A. Cheeseman (Submitted

  15. Stochastic Generation of Synthetic Precipitation Time Series with High Temporal and Spatial Resolution for Engineering Practice

    E-Print Network [OSTI]

    Cirpka, Olaf Arie

    Stochastic Generation of Synthetic Precipitation Time Series with High Temporal and Spatial.Brommundt@iws.uni-stuttgart.de Introduction The stochastic precipitation time series generator, NiedSim, has been developed and installed been generated. In the year 2004 NiedSim was set up for Hessen and Rheinland-Pfalz. The total project

  16. THE LINK BETWEEN CLAY MINERAL WEATHERING AND THE FORMATION OF NI SURFACE PRECIPITATES

    E-Print Network [OSTI]

    Sparks, Donald L.

    THE LINK BETWEEN CLAY MINERAL WEATHERING AND THE FORMATION OF NI SURFACE PRECIPITATES Andreas C minerals may proceed via formation of surface precipitates, which may lead to a significant long the formation of several mineral phases with distinct solubilities. While turbostratic a-type metal hydroxides

  17. Organic nitrogen in aerosols and precipitation at Barbados and Miami: Implications regarding sources, transport

    E-Print Network [OSTI]

    Hansell, Dennis

    Organic nitrogen in aerosols and precipitation at Barbados and Miami: Implications regarding time series sites: Barbados and Miami. WSON total deposition rates ranged from 17.9 mmol m-2 yr-1 to 49), Organic nitrogen in aerosols and precipitation at Barbados and Miami: Implications regarding sources

  18. Seafloor-precipitated carbonate fans in the Neoproterozoic Rainstorm Member, Johnnie Formation, Death Valley Region, USA

    E-Print Network [OSTI]

    Fischer, Woodward

    Seafloor-precipitated carbonate fans in the Neoproterozoic Rainstorm Member, Johnnie Formation Member of the Johnnie Formation, Death Valley, USA. The fans formed in a mixed carbonate of inhibitors to carbonate nucleation (perhaps Fe2+ under anoxic conditions) likely fostered precipitation

  19. EXPERIMENTAL ANALYSIS OF AN UNDESIRABLE CRYSTAL PRECIPITATE IN A DEVELOPMENTAL CARBON FUEL CELL

    E-Print Network [OSTI]

    Qiu, Bo

    EXPERIMENTAL ANALYSIS OF AN UNDESIRABLE CRYSTAL PRECIPITATE IN A DEVELOPMENTAL CARBON FUEL CELL Thesis Advisor Dr. Michael Jerry Antal Jr. #12;iv Abstract Carbon fuel cells have the potential composition and formula of an unwanted crystal precipitate being produced from a carbon fuel cell

  20. Precipitation process for the removal of technetium values from nuclear waste solutions

    DOE Patents [OSTI]

    Walker, D.D.; Ebra, M.A.

    1985-11-21

    High efficiency removal of techetium values from a nuclear waste stream is achieved by addition to the waste stream of a precipitant contributing tetraphenylphosphonium cation, such that a substantial portion of the technetium values are precipitated as an insoluble pertechnetate salt.

  1. Formation Damage due to Iron Precipitation in Acidizing Operations and Evaluating GLDA as a Chelating Agent 

    E-Print Network [OSTI]

    Mittal, Rohit

    2012-02-14

    Iron control during acidizing plays a key role in the success of matrix treatment. Ferric ion precipitates in the formation once the acid is spent and the pH exceeds 1-2. Precipitation of iron (III) within the formation ...

  2. Gated frequency-resolved optical imaging with an optical parametric amplifier for medical applications

    SciTech Connect (OSTI)

    Cameron, S.M.; Bliss, D.E.

    1997-02-01

    Implementation of optical imagery in a diffuse inhomogeneous medium such as biological tissue requires an understanding of photon migration and multiple scattering processes which act to randomize pathlength and degrade image quality. The nature of transmitted light from soft tissue ranges from the quasi-coherent properties of the minimally scattered component to the random incoherent light of the diffuse component. Recent experimental approaches have emphasized dynamic path-sensitive imaging measurements with either ultrashort laser pulses (ballistic photons) or amplitude modulated laser light launched into tissue (photon density waves) to increase image resolution and transmissive penetration depth. Ballistic imaging seeks to compensate for these {open_quotes}fog-like{close_quotes} effects by temporally isolating the weak early-arriving image-bearing component from the diffusely scattered background using a subpicosecond optical gate superimposed on the transmitted photon time-of-flight distribution. The authors have developed a broadly wavelength tunable (470 nm -2.4 {mu}m), ultrashort amplifying optical gate for transillumination spectral imaging based on optical parametric amplification in a nonlinear crystal. The time-gated image amplification process exhibits low noise and high sensitivity, with gains greater than 104 achievable for low light levels. We report preliminary benchmark experiments in which this system was used to reconstruct, spectrally upcovert, and enhance near-infrared two-dimensional images with feature sizes of 65 {mu}m/mm{sup 2} in background optical attenuations exceeding 10{sup 12}. Phase images of test objects exhibiting both absorptive contrast and diffuse scatter were acquired using a self-referencing Shack-Hartmann wavefront sensor in combination with short-pulse quasi-ballistic gating. The sensor employed a lenslet array based on binary optics technology and was sensitive to optical path distortions approaching {lambda}/100.

  3. Combined Daily Monitoring of Aerosol Optical Depths and Water Vapour Column Content during LACE 98 and LITFASS 98 Experiments

    E-Print Network [OSTI]

    Novikov, V V; Alekseeva, G A; Galkin, V D; Güldner, J; Naebert, T; Service, German Weather; Observatory, Meteorological; Lindenberg,; Germany,; Sciences, Russian Academy of; Observatory, Pulkovo; Petersburg, St; Russia,

    2010-01-01

    During summer of 1998 two large-scale complex campaigns, LITFASS98 (May 25th to June 22nd) and LACE98 (July 13th to August 14th), took place at the Meteorological Observatory Lindenberg (MOL). The aim of both experiments focus on the intensive daily observations of atmospheric conditions and the determination of their fundamental meteorological parameters in the vertical column over Lindenberg (Lindenberg's Column). About 20 German research institutions and addition one from the Netherlands, Austria and Russia participated at the experiments. A wide variety of ground-based instruments was operated in Lindenberg and Falkenberg, including LIDARs, microwave radiometer and radiosondes complemented by tethered balloons and aircraft measurements. For the first time the star- and sunphotometer of MOL were used together with other geophysical tools. The observations with both photometers were carried out practically every day and night except during absolutely overcast conditions. The observed data were processed imm...

  4. A Measurement of Time-Averaged Aerosol Optical Depth using Air-Showers Observed in Stereo by HiRes

    E-Print Network [OSTI]

    Res R.U. Abbasi,1 T. Abu-Zayyad,1 J.F. Amann,2 G. Archbold,1 R. Atkins,1 K. Belov,1 J.W. Belz,3 S. BenZvi,5 D.R. Bergman,6 J.H. Boyer,4 C.T. Cannon,1 Z. Cao,1 B.M. Connolly,5 Y. Fedorova,1 C.B. Finley,5 W.C. Knapp,4 E.C. Loh,1 N. Manago,7 E.J. Mannel,4 K. Martens,1 J.A.J. Matthews,8 J.N. Matthews,1 A. O'Neill,5

  5. Ground-based retrievals of optical depth, effective radius, and composition of airborne mineral dust above the Sahel

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journalvivo Low-Dose Lowď‚— We wantInvestigationsMeasurement (ARM)retrievals

  6. Weighted exponential regression for characterizing radionuclide concentrations in soil depth profiles

    SciTech Connect (OSTI)

    C.P.Oertel; J.R.Giles

    2009-11-01

    Characterization of radionuclide concentrations in soil profiles requires accurate evaluation of the depth distribution of the concentrations as measured by gamma emissions. An ongoing study based on 137Cs activity has shown that such concentration data generally follow an exponential trend when the fraction of radioactivity below depth is plotted against the depth. The slope of the exponential regression fit is defined as alpha/rho, the depth profile parameter. A weighted exponential regression procedure has been developed to compute a mean ??? for a group of related soil samples. Regression results from different areas or from different time periods can be used to compare representative radionuclide concentrations for the specified groupings.

  7. The depth of pseudotachylyte formation from detailed thermochronology and constraints on coseismic stress drop variability

    E-Print Network [OSTI]

    Kirkpatrick, James D.; Dobson, Kate J.; Brodsky, Emily E.; Mark, Darren F.; Shipton, Zoe K.

    2012-01-01

    Subnormal Cenozoic geothermal gradients in the extinctC. E. Manning (2003), Geothermal gradients in con- tinentalkm under typical geothermal gradients. At these depths, the

  8. The impact of remineralization depth on the air–sea carbon balance

    E-Print Network [OSTI]

    Kwon, EY; Primeau, F; Sarmiento, JL

    2009-01-01

    on the air–sea carbon balance Eun Young Kwon 1 * , Françoistion depth—depends on the balance between particle sinkingfactors can affect this balance, including temperature 1 ,

  9. Use of Rapid Temperature Measurements at a 2-Meter Depth to Augment...

    Open Energy Info (EERE)

    Temperature Measurements at a 2-Meter Depth to Augment Deeper Temperature Gradient Drilling Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper:...

  10. Plant Water Use in Owens Valley, CA: Understanding the Influence of Climate and Depth to Groundwater

    E-Print Network [OSTI]

    Pataki, Diane E

    2008-01-01

    plant responses to water stress, plant chemical composition,Phreatophytes (Geological Survey Water-Supply Paper 1423).T. E. Dawson. 2006. Depth of water acquisition by invading

  11. Compound semiconductor optical waveguide switch

    DOE Patents [OSTI]

    Spahn, Olga B.; Sullivan, Charles T.; Garcia, Ernest J.

    2003-06-10

    An optical waveguide switch is disclosed which is formed from III-V compound semiconductors and which has a moveable optical waveguide with a cantilevered portion that can be bent laterally by an integral electrostatic actuator to route an optical signal (i.e. light) between the moveable optical waveguide and one of a plurality of fixed optical waveguides. A plurality of optical waveguide switches can be formed on a common substrate and interconnected to form an optical switching network.

  12. Distinct optical properties of relativistically degenerate matter

    SciTech Connect (OSTI)

    Akbari-Moghanjoughi, M.

    2014-06-15

    In this paper, we use the collisional quantum magnetohydrodynamic (CQMHD) model to derive the transverse dielectric function of a relativistically degenerate electron fluid and investigate various optical parameters, such as the complex refractive index, the reflection and absorption coefficients, the skin-depth and optical conductivity. In this model we take into accounts effects of many parameters such as the atomic-number of the constituent ions, the electron exchange, electron diffraction effect and the electron-ion collisions. Study of the optical parameters in the solid-density, the warm-dense-matter, the big-planetary core, and the compact star number-density regimes reveals that there are distinct differences between optical characteristics of the latter and the former cases due to the fundamental effects of the relativistic degeneracy and other quantum mechanisms. It is found that in the relativistic degeneracy plasma regime, such as found in white-dwarfs and neutron star crusts, matter possess a much sharper and well-defined step-like reflection edge beyond the x-ray electromagnetic spectrum, including some part of gamma-ray frequencies. It is also remarked that the magnetic field intensity only significantly affects the plasma reflectivity in the lower number-density regime, rather than the high density limit. Current investigation confirms the profound effect of relativistic degeneracy on optical characteristics of matter and can provide an important plasma diagnostic tool for studying the physical processes within the wide scope of quantum plasma regimes be it the solid-density, inertial-confined, or astrophysical compact stars.

  13. Transpiration purged optical probe

    DOE Patents [OSTI]

    2004-01-06

    An optical apparatus for clearly viewing the interior of a containment vessel by applying a transpiration fluid to a volume directly in front of the external surface of the optical element of the optical apparatus. The fluid is provided by an external source and transported by means of an annular tube to a capped end region where the inner tube is perforated. The perforation allows the fluid to stream axially towards the center of the inner tube and then axially away from an optical element which is positioned in the inner tube just prior to the porous sleeve. This arrangement draws any contaminants away from the optical element keeping it free of contaminants. In one of several embodiments, the optical element can be a lens, a viewing port or a laser, and the external source can provide a transpiration fluid having either steady properties or time varying properties.

  14. Optical atomic magnetometer

    DOE Patents [OSTI]

    Budker, Dmitry; Higbie, James; Corsini, Eric P.

    2013-11-19

    An optical atomic magnetometers is provided operating on the principles of nonlinear magneto-optical rotation. An atomic vapor is optically pumped using linearly polarized modulated light. The vapor is then probed using a non-modulated linearly polarized light beam. The resulting modulation in polarization angle of the probe light is detected and used in a feedback loop to induce self-oscillation at the resonant frequency.

  15. 27 Jan 2003 Smart Optics Faraday Partnership 1 Smart Optics

    E-Print Network [OSTI]

    Greenaway, Alan

    27 Jan 2003 Smart Optics Faraday Partnership 1 Smart Optics Technologies, Techniques and Space Applications Alan Greenaway Physics, EPS Heriot-Watt University #12;27 Jan 2003 Smart Optics Faraday Partnership 2 Smart? · The Smart Optics Faraday Partnership interprets `Smart Optics' to mean: ­ `... includes

  16. NONLINEAR OPTICS AT INTERFACES

    E-Print Network [OSTI]

    Chen, Chenson K.

    2010-01-01

    Surface Plasmons at a Metal-Dielectric Interface . . . .Plasmons at Metal-Dielectric Interfaces . . . . A. GeneralNONLINEAR OPTICS AT INTERFACES Chenson K. Chen (Ph.D.

  17. Study of chirally motivated low-energy $K^-$ optical potentials

    E-Print Network [OSTI]

    A. Cieply; E. Friedman; A. Gal; J. Mares

    2001-06-09

    The $K^-$ optical potential in the nuclear medium is evaluated self consistently from a free-space $K^-N$ $t$ matrix constructed within a coupled-channel chiral approach to the low-energy $\\bar K N$ data. The chiral-model parameters are fitted to a select subset of the low-energy data {\\it plus} the $K^-$ atomic data throughout the periodic table. The resulting attractive $K^-$ optical potentials are relatively `shallow', with central depth of the real part about 55 MeV, for a fairly reasonable reproduction of the atomic data with $\\chi^2 / N \\approx 2.2$. Relatively `deep' attractive potentials of depth about 180 MeV, which result in other phenomenological approaches with $\\chi^2 / N \\approx 1.5$, are ruled out within chirally motivated models. Different physical data input is required to distinguish between shallow and deep $K^-$ optical potentials. The ($K^{-}_{\\rm stop},\\pi$) reaction could provide such a test, with exclusive rates differing by over a factor of three for the two classes of potentials. Finally, forward ($K^-,p$) differential cross sections for the production of relatively narrow deeply bound $K^-$ {\\it nuclear} states are evaluated for deep $K^-$ optical potentials, yielding values considerably lower than those estimated before.

  18. An Analogue Approach to Identify Heavy Precipitation Events: Evaluation and Application to CMIP5 Climate Models in the United States

    E-Print Network [OSTI]

    Gao, Xiang

    An analogue method is presented to detect the occurrence of heavy precipitation events without relying on modeled precipitation. The approach is based on using composites to identify distinct large-scale atmospheric ...

  19. The physical basis for increases in precipitation extremes in simulations of 21st-century climate change

    E-Print Network [OSTI]

    O'Gorman, Paul Ambrose

    Global warming is expected to lead to a large increase in atmospheric water vapor content and to changes in the hydrological cycle, which include an intensification of precipitation extremes. The intensity of precipitation ...

  20. Investigation of Non-homogenous hidden Markov models and their Application to Spatially-distributed Precipitation Types 

    E-Print Network [OSTI]

    Song, Jae Young

    2012-08-29

    Precipitation is an important element in the hydrological cycle. To predict and simulate large-scale precipitation, Global Circulation Models (GCMs) are widely used. However, their grid scale is too big to apply to local ...