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


1

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

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

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

2

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

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

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

Liu, Guosheng

3

Determination of Ice Water Path Over the ARM SGP Using Combined Surface and Satellite Datasets  

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

Determination of Ice Water Path Over the ARM SGP Using Determination of Ice Water Path Over the ARM SGP Using Combined Surface and Satellite Datasets J. Huang, M. M. Khaiyer, and P. W. Heck Analytical Services & Materials, Inc. Hampton, Virginia P. Minnis and B. Lin Atmospheric Sciences National Aeronautics and Space Administration Langley Research Center Hampton, Virginia T.-F. Fan Science Applications International Corporation Hampton, Virginia Introduction Global information of cloud ice water path (IWP) is urgently needed for testing of global climate models (GCMs) and other applications. Accurate quantification of the IWP is essential for characterizing the hydrological and radiation budget. For example, the reflection of shortwave radiation by ice clouds reduces the solar energy reaching the earth's surface. Ice clouds can also trap the longwave radiation

4

Kinetic energy of protons in ice Ih and water: A path integral study  

Science Journals Connector (OSTI)

The kinetic energy of H and O nuclei has been studied by path integral molecular-dynamics simulations of ice Ih and water at ambient pressure. The simulations were performed by using the q-TIP4P/F model, a point-charge empirical potential that includes molecular flexibility and anharmonicity in the OH stretch of the water molecule. Ice Ih was studied in a temperature range between 210 and 290 K, and water between 230 and 320 K. Simulations of an isolated water molecule were performed in the range 210–320 K to estimate the contribution of the intramolecular vibrational modes to the kinetic energy. Our results for the proton kinetic energy KH in water and ice Ih show both agreement and discrepancies with different published data based on deep inelastic neutron-scattering experiments. Agreement is found for water at the experimental melting point and in the range 290–300 K. Discrepancies arise because data derived from the scattering experiments predict in water two maxima of KH around 270 and 277 K, and that KH is lower in ice than in water at 269 K. As a check of the validity of the employed water potential, we show that our simulations are consistent with other experimental thermodynamic properties related to KH, such as the temperature dependence of the liquid density, the heat capacity of water and ice at constant pressure, and the isotopic shift in the melting temperature of ice upon isotopic substitution of either H or O atoms. Moreover, the temperature dependence of KH predicted by the q-TIP4P/F model for ice Ih is found to be in good agreement with results of path integral simulations using ab initiodensity-functional theory.

R. Ramírez and C. P. Herrero

2011-08-31T23:59:59.000Z

5

TRMM observations of the global relationship between ice water content and lightning  

E-Print Network [OSTI]

to study the fundamental relationship between precipitation ice mass and lightning flash density water path and lightning flash density is relatively invariant between land, ocean and coastal regimes proportionality between charge generation rates on ice and lightning flash rates, predict a linear to slightly non

Rutledge, Steven

6

Viscosity of interfacial water regulates ice nucleation  

SciTech Connect (OSTI)

Ice formation on solid surfaces is an important phenomenon in many fields, such as cloud formation and atmospheric icing, and a key factor for applications in preventing freezing. Here, we report temperature-dependent nucleation rates of ice for hydrophilic and hydrophobic surfaces. The results show that hydrophilic surface presents a lower ice nucleation rate. We develop a strategy to extract the thermodynamic parameters, J{sub 0} and ?, in the context of classical nucleation theory. From the extracted J{sub 0} and ?, we reveal the dominant role played by interfacial water. The results provide an insight into freezing mechanism on solid surfaces.

Li, Kaiyong; Chen, Jing; Zhang, Qiaolan; Zhang, Yifan [Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China) [Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); University of Chinese Academy of Sciences, Beijing 100049 (China); Xu, Shun; Zhou, Xin [School of Physics, University of Chinese Academy of Sciences, Beijing 100049 (China)] [School of Physics, University of Chinese Academy of Sciences, Beijing 100049 (China); Cui, Dapeng; Wang, Jianjun, E-mail: wangj220@iccas.ac.cn; Song, Yanlin [Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)] [Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)

2014-03-10T23:59:59.000Z

7

The Effects of Rotation and Ice Shelf Topography on Frazil-Laden Ice Shelf Water Plumes  

E-Print Network [OSTI]

, Antarctica. In addition, it is found that the model only produces reasonable marine ice formation rates whenThe Effects of Rotation and Ice Shelf Topography on Frazil-Laden Ice Shelf Water Plumes PAUL R of the dynamics and thermodynamics of a plume of meltwater at the base of an ice shelf is presented. Such ice

Feltham, Daniel

8

UAV/UAS path planning for ice management information gathering.  

E-Print Network [OSTI]

??The key objective of this work is the proposition of the path planning strategy for unmanned aerial vehicle (UAV) intended for information gathering in Arctic… (more)

Stalmakou, Artsiom

2011-01-01T23:59:59.000Z

9

Sea ice control of water isotope transport to Antarctica and implications for ice core interpretation  

E-Print Network [OSTI]

associated with diabatic heating. The interior deuterium excess response is more strongly affected by sea ice ice and the local conditions may have remote influences [Jacobs and Comiso, 1997; StammerjohnSea ice control of water isotope transport to Antarctica and implications for ice core

Noone, David

10

High-resolution subsurface water-ice distributions on Mars  

Science Journals Connector (OSTI)

... Theoretical models indicate that water ice is stable in the shallow subsurface (depths of water-ice table that steadily increases in depth with decreasing latitude. More detailed modelling has ...

Joshua L. Bandfield

2007-05-03T23:59:59.000Z

11

Covered Product Category: Water-Cooled Ice Machines  

Broader source: Energy.gov [DOE]

The Federal Energy Management Program (FEMP) provides acquisition guidance and federal efficiency requirements for water-cooled ice machines.

12

Water Evaporation: A Transition Path Sampling Study  

E-Print Network [OSTI]

We use transition path sampling to study evaporation in the SPC/E model of liquid water. Based on thousands of evaporation trajectories, we characterize the members of the transition state ensemble (TSE), which exhibit a liquid-vapor interface with predominantly negative mean curvature at the site of evaporation. We also find that after evaporation is complete, the distributions of translational and angular momenta of the evaporated water are Maxwellian with a temperature equal to that of the liquid. To characterize the evaporation trajectories in their entirety, we find that it suffices to project them onto just two coordinates: the distance of the evaporating molecule to the instantaneous liquid-vapor interface, and the velocity of the water along the average interface normal. In this projected space, we find that the TSE is well-captured by a simple model of ballistic escape from a deep potential well, with no additional barrier to evaporation beyond the cohesive strength of the liquid. Equivalently, they are consistent with a near-unity probability for a water molecule impinging upon a liquid droplet to condense. These results agree with previous simulations and with some, but not all, recent experiments.

Patrick Varilly; David Chandler

2012-10-11T23:59:59.000Z

13

Heterogeneous ice nucleation and water uptake by field-collected...  

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

properties through heterogeneous nucleation is not well understood. Heterogeneous ice nucleation and water uptake by ambient particles collected from urban environments in...

14

Relationships between Water Wettability and Ice Adhesion  

E-Print Network [OSTI]

Ice formation and accretion may hinder the operation of many systems critical to national infrastructure, including airplanes, power lines, windmills, ships, and telecommunications equipment. Yet despite the pervasiveness ...

Meuler, Adam J.

15

Ice  

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

Ice Ice Nature Bulletin No. 661-A january 7, 1978 Forest Preserve District of Cook County George W. Dunne, President Roland F. Eisenbeis, Supt. of Conservation ICE There was a time when ice, cut on frozen ponds and lakes, was transported by fast clipper ships from New England to New Orleans where it was worth its weight in gold. Nowadays this cold brittle colorless substance is commonplace everywhere. Few people, however, know that ice is one of the strangest of all solids; and that, because of its unique properties, life on earth is what it is. Those properties are due to the distinctive structure of a molecule of water, formed of three elemental particles or atoms -- two of hydrogen and one of oxygen -- expressed by the familiar symbol, H2O. The three atoms are held together by two chemical bonds expressed by another symbol, H-O-H. Briefly, the unique properties of water, water vapor, and ice arise from that bonding and the arrangement of electron pairs around the oxygen atom.

16

The stickiness of micrometer-sized water-ice particles  

E-Print Network [OSTI]

Water ice is one of the most abundant materials in dense molecular clouds and in the outer reaches of protoplanetary disks. In contrast to other materials (e.g., silicates) water ice is assumed to be stickier due to its higher specific surface energy, leading to faster or more efficient growth in mutual collisions. However, experiments investigating the stickiness of water ice have been scarce, particularly in the astrophysically relevant micrometer-size region and at low temperatures. In this work, we present an experimental setup to grow aggregates composed of $\\mathrm{\\mu}$m-sized water-ice particles, which we used to measure the sticking and erosion thresholds of the ice particles at different temperatures between $114 \\, \\mathrm{K}$ and $260 \\, \\mathrm{K}$. We show with our experiments that for low temperatures (below $\\sim 210 \\, \\mathrm{K}$), $\\mathrm{\\mu}$m-sized water-ice particles stick below a threshold velocity of $9.6 \\, \\mathrm{m \\, s^{-1}}$, which is approximately ten times higher than the stic...

Gundlach, B

2014-01-01T23:59:59.000Z

17

An Evaluation of MWR Retrievals of Liquid Water Path  

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

Evaluation of MWR Retrievals Evaluation of MWR Retrievals of Liquid Water Path and Precipitable Water Vapor R. T. Marchand and T. P. Ackerman Pacific Northwest National Laboratory Richland, Washington Introduction This paper offers some observations on the quality of Microwave Radiometer (MWR) retrievals of precipitable water vapor (PWV) and liquid water path (LWP). The paper shows case study comparisons between the standard "statistical" approach and those obtained using an iterative solution of the microwave radiative transfer equations. These examples show how improvements in the retrieval of LWP can be obtained by using an iterative approach, but that possible improvements are limited by the accuracy of the forward model absorption coefficients and errors in the brightness temperature measurements. Each of these effects limits the

18

Alaskan Ice Road Water Supplies Augmented by Snow Barriers  

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

6, 2013 6, 2013 Alaskan Ice Road Water Supplies Augmented by Snow Barriers Washington, D.C. - In a project supported and managed by the Office of Fossil Energy's National Energy Technology Laboratory (NETL), researchers at the University of Alaska Fairbanks have demonstrated that the use of artificial barriers-snow fences-can significantly increase the amount of fresh water supplies in Arctic lakes at a fraction of the cost of bringing in water from nearby lakes. The results promise to enhance environmentally sound development of Alaska's natural resources, lowering the costs of building ice roads used for exploring for oil and natural gas in Alaska. They could also be used to help augment fresh water supplies at remote villages. Researcher Joel Bailey measures the density of the snow in this snow pit to determine the amount of snow in the drift and the water equivalent of the snow drift.

19

Modeling the Dynamics of the North Water Polynya Ice Bridge  

Science Journals Connector (OSTI)

The North Water polynya, the largest polynya in the world, forms annually and recurrently in Smith Sound in northern Baffin Bay. Its formation is governed in part by the formation of an ice bridge in the narrow channel of Nares Strait below Kane ...

Dany Dumont; Yves Gratton; Todd E. Arbetter

2009-06-01T23:59:59.000Z

20

Application of FLake for the prediction of ice thickness for inland waters in the Netherlands  

E-Print Network [OSTI]

Application of FLake for the prediction of ice thickness for inland waters in the Netherlands Cisco in the Netherlands. In cold spells numerous ditches, canals and lakes get frozen and many people go out for ice in the Netherlands. in ice thickness predictions. KNMI issues ice thickness predictions, based on a model of De Bruin

Stoffelen, Ad

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


21

Thermal Desorption of Water-Ice in the Interstellar Medium  

E-Print Network [OSTI]

Water (H2O) ice is an important solid constituent of many astrophysical environments. To comprehend the role of such ices in the chemistry and evolution of dense molecular clouds and comets, it is necessary to understand the freeze-out, potential surface reactivity, and desorption mechanisms of such molecular systems. Consequently, there is a real need from within the astronomical modelling community for accurate empirical molecular data pertaining to these processes. Here we give the first results of a laboratory programme to provide such data. Measurements of the thermal desorption of H2O ice, under interstellar conditions, are presented. For ice deposited under conditions that realistically mimic those in a dense molecular cloud, the thermal desorption of thin films (~50 molecular layers) is found to occur with zero order kinetics characterised by a surface binding energy, E_{des}, of 5773 +/- 60 K, and a pre-exponential factor, A, of 10^(30 +/- 2) molecules cm^-2 s^-1. These results imply that, in the dense interstellar medium, thermal desorption of H2O ice will occur at significantly higher temperatures than has previously been assumed.

Helen J. Fraser; Mark P. Collings; Martin R. S. McCoustra; David A. Williams

2001-07-25T23:59:59.000Z

22

Peakons arising as particle paths beneath small-amplitude water waves  

E-Print Network [OSTI]

We present a new kind of particle path in constant vorticity water of finite depth, within the framework of small-amplitude waves.

Delia Ionescu-Kruse

2011-06-20T23:59:59.000Z

23

Spatial association between the locations of roots and water flow paths in highly structured soil  

E-Print Network [OSTI]

Considerable evidence exists that the majority of low tension water flow through highly structured clayey soil occurs in a small fraction of total pore space and that the flow paths converge as depth increases. In structured clayey soils, water...

Gardiner, Nathan Thomas

2005-02-17T23:59:59.000Z

24

Laboratory evidence for efficient water formation in interstellar ices  

E-Print Network [OSTI]

Even though water is the main constituent in interstellar icy mantles, its chemical origin is not well understood. Three different formation routes have been proposed following hydrogenation of O, O2, or O3, but experimental evidence is largely lacking. We present a solid state astrochemical laboratory study in which one of these routes is tested. For this purpose O2 ice is bombarded by H- or D-atoms under ultra high vacuum conditions at astronomically relevant temperatures ranging from 12 to 28 K. The use of reflection absorption infrared spectroscopy (RAIRS) permits derivation of reaction rates and shows efficient formation of H2O (D2O) with a rate that is surprisingly independent of temperature. This formation route converts O2 into H2O via H2O2 and is found to be orders of magnitude more efficient than previously assumed. It should therefore be considered as an important channel for interstellar water ice formation as illustrated by astrochemical model calculations.

S. Ioppolo; H. M. Cuppen; C. Romanzin; E. F. van Dishoeck; H. Linnartz

2008-07-01T23:59:59.000Z

25

A study of the ice-water interface using the TIP4P/2005 water model  

E-Print Network [OSTI]

In this work we study the ice-water interface under coexistence conditions by means of molecular simulations using the TIP4P/2005 water model. Following the methodology proposed by Hoyt and co-workers [J. J. Hoyt, M. Asta and A. Karma, Phys. Rev. Lett., 86, 5530, (2001)] we measure the interfacial free energy of ice with liquid water by analysing the spectrum of capillary fluctuations of the interface. We get an orientationally averaged interfacial free energy of 27(2) mN/m, in good agreement with a recent estimate obtained from simulation data of the size of critical clusters [E. Sanz, C. Vega, J. R. Espinosa, R. Caballero-Bernal, J. L. F. Abascal and C. Valeriani, JACS, 135, 15008, (2013)]. We also estimate the interfacial free energy of different planes and obtain 27(2), 28(2)and 28(2) mN/m for the basal, the primary prismatic and the secondary prismatic planes respectively. Finally, we inspect the structure of the interface and find that its thickness is of approximately 4-5 molecular diameters. Moreover, we find that when the basal plane is exposed to the fluid the interface alternates regions of cubic ice with regions of hexagonal ice.

Jorge Benet; Luis G. MacDowell; Eduardo Sanz

2014-10-01T23:59:59.000Z

26

FEMP-Designated Product: Water-Cooled Ice Machines | Department of Energy  

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

FEMP-Designated Product: Water-Cooled Ice Machines FEMP-Designated Product: Water-Cooled Ice Machines FEMP-Designated Product: Water-Cooled Ice Machines October 7, 2013 - 11:11am Addthis Federal agencies are required by the National Energy Conservation Policy Act (P.L. 95-619), Executive Order 13423, Executive Order 13514, and Federal Acquisition Regulations (FAR) Subpart 23.2 and 53.223 to specify and buy ENERGY STAR® qualified products or, in categories not included in the ENERGY STAR program, FEMP designated products, which are among the highest 25% of equivalent products for energy efficiency. A PDF version of Water-Cooled Ice Machines is also available. Performance Requirements for Federal Purchases Type Ice Harvest Rate (pounds per 24 hours) Energy Usea (per 100 pounds) Potable Water Useb (per 100 pounds)

27

On the State of Water Ice on Saturn's Moon Titan and Implications to Icy Bodies in the Outer Solar System  

E-Print Network [OSTI]

experimental study to investigate the amorphization of crystalline water ice via ionizing radiation irradiation water ice in the 10-50 K and 10-140 K temperature ranges, respectively, and conducted a systematic at doses of up to 160 ( 30 eV per molecule. We found that crystalline water ice can be converted only

Jewitt, David C.

28

Evaluation of a Forward Operator to Assimilate Cloud Water Path into WRF-DART  

Science Journals Connector (OSTI)

Assimilating satellite-retrieved cloud properties into storm-scale models has received limited attention despite its potential to provide a wide array of information to a model analysis. Available retrievals include cloud water path (CWP), which ...

Thomas A. Jones; David J. Stensrud; Patrick Minnis; Rabindra Palikonda

2013-07-01T23:59:59.000Z

29

Can xenon in water inhibit ice growth? Molecular dynamics of phase transitions in water$-$Xe system  

E-Print Network [OSTI]

Motivated by recent experiments showing the promise of noble gases as cryoprotectants, we perform molecular dynamics modeling of phase transitions in water with xenon under cooling. We study the structure and dynamics of xenon water solution as a function of temperature. Homogeneous nucleation of clathrate hydrate phase is observed and characterized. As the temperature is further reduced we observe hints of dissociation of clathrate due to stronger hydrophobic hydration, pointing towards a possible instability of clathrate at cryogenic temperatures and conversion to an amorphous phase comprised of "xenon + hydration shell" Xe$\\cdot$(H$_{2}$O)$_{21.5}$ clusters. Simulations of ice$-$xenon solution interface in equilibrium and during ice growth reveal the effects of xenon on the ice$-$liquid interface, where adsorbed xenon causes roughening of ice surface but does not preferentially form clathrate. These results provide evidence against the ice-blocker mechanism of xenon cryoprotection.

Vasilii I. Artyukhov; Alexander Yu. Pulver; Alex Peregudov; Igor Artyuhov

2014-07-11T23:59:59.000Z

30

Sleuthing the Fate of Water in Ancient Aquifers and Ice Cores | U.S. DOE  

Office of Science (SC) Website

Sleuthing the Fate of Water in Ancient Aquifers and Ice Cores Sleuthing the Fate of Water in Ancient Aquifers and Ice Cores Nuclear Physics (NP) NP Home About Research Facilities Science Highlights Benefits of NP Funding Opportunities Nuclear Science Advisory Committee (NSAC) News & Resources Contact Information Nuclear Physics U.S. Department of Energy SC-26/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3613 F: (301) 903-3833 E: sc.np@science.doe.gov More Information » October 2012 Sleuthing the Fate of Water in Ancient Aquifers and Ice Cores Precision analytical techniques developed for fundamental experiments in nuclear physics now enable routine measurements of ultra-low concentrations of Krypton radioisotopes in samples of water, ice, and gas. Print Text Size: A A A Subscribe FeedbackShare Page

31

Alaskan Ice Road Water Supplies Augmented by Snow Barriers | Department of  

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

Alaskan Ice Road Water Supplies Augmented by Snow Barriers Alaskan Ice Road Water Supplies Augmented by Snow Barriers Alaskan Ice Road Water Supplies Augmented by Snow Barriers March 6, 2013 - 10:55am Addthis Monitoring equipment and part of the snowfence peek out of the snow drift. Monitoring equipment and part of the snowfence peek out of the snow drift. The aerial view shows the experimental lake at Franklin Bluffs used for the snowfence experiment. The aerial view shows the experimental lake at Franklin Bluffs used for the snowfence experiment. Researcher Joel Bailey measures the density of the snow in this snow pit to determine the amount of snow in the drift and the water equivalent of the snow drift. Researcher Joel Bailey measures the density of the snow in this snow pit to determine the amount of snow in the drift and the water equivalent of the

32

Alaskan Ice Road Water Supplies Augmented by Snow Barriers | Department of  

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

Alaskan Ice Road Water Supplies Augmented by Snow Barriers Alaskan Ice Road Water Supplies Augmented by Snow Barriers Alaskan Ice Road Water Supplies Augmented by Snow Barriers March 6, 2013 - 10:55am Addthis Monitoring equipment and part of the snowfence peek out of the snow drift. Monitoring equipment and part of the snowfence peek out of the snow drift. The aerial view shows the experimental lake at Franklin Bluffs used for the snowfence experiment. The aerial view shows the experimental lake at Franklin Bluffs used for the snowfence experiment. Researcher Joel Bailey measures the density of the snow in this snow pit to determine the amount of snow in the drift and the water equivalent of the snow drift. Researcher Joel Bailey measures the density of the snow in this snow pit to determine the amount of snow in the drift and the water equivalent of the

33

Adaptive Optics Observations of 3 micron Water Ice in Silhouette Disks in the Orion Nebula Cluster and M43  

E-Print Network [OSTI]

We present the near-infrared images and spectra of four silhouette disks in the Orion Nebula Cluster (ONC; M42) and M43 using the Subaru Adaptive Optics system. While d053-717 and d141-1952 show no water ice feature at 3.1 micron, a moderately deep (tau~0.7) water ice absorption is detected toward d132-1832 and d216-0939. Taking into account the water ice so far detected in the silhouette disks, the critical inclination angle to produce a water ice absorption feature is confirmed to be 65-75deg. As for d216-0939, the crystallized water ice profile is exactly the same as in the previous observations taken 3.63 years ago. If the water ice material is located at 30AU, then the observations suggest it is uniform at a scale of about 3.5AU.

Terada, Hiroshi; Pyo, Tae-Soo; Minowa, Yosuke; Hayano, Yutaka; Oya, Shin; Watanabe, Makoto; Hattori, Masayuki; Saito, Yoshihiko; Ito, Meguru; Takami, Hideki; Iye, Masanori

2012-01-01T23:59:59.000Z

34

On the streamlines and particle paths of gravitational water waves  

E-Print Network [OSTI]

We investigate steady symmetric gravity water waves on finite depth. For non-positive vorticity it is shown that the particles display a mean forward drift, and for a class of waves we prove that the size of this drift is strictly increasing from bottom to surface. We also provide detailed information concerning the streamlines and the particle trajectories. This includes the case of particles within irrotational waves.

Mats Ehrnstrom

2007-12-04T23:59:59.000Z

35

Measurement of Total Water with a Tunable Diode Laser Hygrometer: Inlet Analysis, Calibration Procedure, and Ice Water Content Determination  

Science Journals Connector (OSTI)

The University of Colorado closed-path tunable diode laser hygrometer (CLH), a new instrument for the in situ measurement of enhanced total water (eTW, the sum of water vapor and condensed water enhanced by a subisokinetic inlet), has recently ...

Sean M. Davis; A. Gannet Hallar; Linnea M. Avallone; William Engblom

2007-03-01T23:59:59.000Z

36

The D/H Ratio of Water Ice at Low Temperatures  

E-Print Network [OSTI]

We present the modeling results of deuterium fractionation of water ice, H2, and the primary deuterium isotopologues of H3+ adopting physical conditions associated with the star and planet formation process. We calculated the deuterium chemistry for a range of gas temperatures (T_gas ~ 10 - 30 K), molecular hydrogen density (n(H2)~ 10^4 - 10^7), and ortho/para ratio (opr) of H2 based on state-to-state reaction rates and explore the resulting fractionation including the formation of a water ice mantle coating grain surfaces. We find that the deuterium fractionation exhibits the expected temperature dependence of large enrichments at low gas temperature. More significantly the inclusion of water ice formation leads to large D/H ratios in water ice (>= 10^-2 at 10 K) but also alters the overall deuterium chemistry. For T < 20 K the implantation of deuterium into ices lowers the overall abundance of HD which reduces the efficiency of deuterium fractionation at high density. In agreement with an earlier study, ...

Lee, Jeong-Eun

2014-01-01T23:59:59.000Z

37

Integration of Global Positioning System and Scanning Water Vapor Radiometers for Precipitable Water Vapor and Cloud Liquid Path Estimates  

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

Integration of Global Positioning System and Scanning Integration of Global Positioning System and Scanning Water Vapor Radiometers for Precipitable Water Vapor and Cloud Liquid Path Estimates V. Mattioli and P. Basili Department of Electronic and Information Engineering University of Perugia Perugia, Italy E. R. Westwater Cooperative Institute for Research in Environmental Sciences University of Colorado National Oceanic and Atmospheric Administration Environmental Technology Laboratory Boulder, Colorado Introduction In recent years the Global Positioning System (GPS) has proved to be a reliable instrument for measuring precipitable water vapor (PWV) (Bevis et al. 1992), offering an independent source of information on water vapor when compared with microwave radiometers (MWRs), and/or radiosonde

38

Equations Governing Space-Time Variability of Liquid Water Path in Stratus Clouds  

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

Equations Governing Space-Time Variability of Equations Governing Space-Time Variability of Liquid Water Path in Stratus Clouds K. Ivanova Pennsylvania State University University Park, Pennsylvania T. P. Ackerman Pacific Northwest National Laboratory Richland, Washington M. Ausloos University of Liège B-4000 Liège, Belgium Abstract We present a method on how to derive an underlying mathematical (statistical or model free) equation for a liquid water path (LWP) signal directly from empirical data. The evolution of the probability density functions (PDFs) from small to large time scales is explicitly derived in the framework of Fokker-Planck equation. A drift and a diffusion term describing the deterministic and stochastic influences on the non-Gaussian fat tails of the liquid water probability distributions are obtained from

39

On the State of Water Ice on Saturn's Moon Titan and Implications to Icy Bodies in the Outer Solar System  

E-Print Network [OSTI]

The crystalline state of water ice in the Solar System depends on the temperature history of the ice and the influence of energetic particles to which it has been exposed. We measured the infrared absorption spectra of amorphous and crystalline water ice in the 10-50 K and 10-140 K temperature range, respectively, and conducted a systematic experimental study to investigate the amorphization of crystalline water ice via ionizing radiation irradiation at doses of up to 160 \\pm 30 eV per molecule. We found that crystalline water ice can be converted only partially to amorphous ice by electron irradiation. The experiments showed that a fraction of the 1.65 \\mum band, which is characteristic for crystalline water ice, survived the irradiation, to a degree that strongly depends on the temperature. Quantitative kinetic fits of the temporal evolution of the 1.65 \\mum band clearly demonstrate that there is a balance between thermal recrystallization and irradiation-induced amorphization, with thermal recrystallizaton dominant at higher temperatures. Our experiments show the amorphization at 40K was incomplete, in contradiction to Mastrapa and Brown's conclusion (Icarus 2006, 183, 207.). At 50 K, the recrystallization due to thermal effects is strong, and most of the crystalline ice survived. Temperatures of most icy objects in the Solar System, including Jovian satellites, Saturnian satellites (including Titan), and Kuiper Belt Objects, are equal to or above 50 K; this explains why water ice detected on those objects is mostly crystalline.

Weijun Zheng; David Jewitt; Ralf I. Kaiser

2008-01-18T23:59:59.000Z

40

Melt and collapse of buried water ice: An alternative hypothesis for the formation of chaotic terrains on Mars  

E-Print Network [OSTI]

Melt and collapse of buried water ice: An alternative hypothesis for the formation of chaotic: T. Spohn Keywords: Mars chaotic terrain heat flux outflow channel Chaotic terrains if these features can form by melting and collapse of buried water ice in a confined basin. 2D thermal modelling

Utrecht, Universiteit

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


41

Project EARTH-13-RK2: Melting and water drainage from ice-stream margins: theory and computation  

E-Print Network [OSTI]

Project EARTH-13-RK2: Melting and water drainage from ice-stream margins: theory and computation sheets that represent an enormous reservoir of water. The mass of this reservoirs is set by a balance importance. Answers will require a deep understanding of the mechanics of ice sheets, and in particular

Henderson, Gideon

42

Validation of Satellite-Derived Liquid Water Paths Using ARM SGP Microwave Radiometers  

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

Satellite-Derived Liquid Water Paths Using Satellite-Derived Liquid Water Paths Using ARM SGP Microwave Radiometers M. M. Khaiyer and J. Huang Analytical Services & Materials, Inc. Hampton, Virginia P. Minnis, B. Lin, and W. L. Smith, Jr. National Aeronautics and Space Administration Langley Research Center Hampton, Virginia A. Fan Science Applications International Corporation Hampton, Virginia A. Rapp Colorado State University Fort Collins, Colorado Introduction Satellites are useful for monitoring climatological parameters over large domains. They are especially useful for measuring various cloud microphysical and radiative parameters where ground-based instruments are not available. The geostationary operational environmental satellite (GOES) has been used to retrieve cloud and radiative properties over an extended domain centered on the Atmospheric

43

Laboratory Determination of the Infrared Band Strengths of Pyrene Frozen in Water Ice: Implications for the Composition of Interstellar Ices  

E-Print Network [OSTI]

Broad infrared emission features (e.g., at 3.3, 6.2, 7.7, 8.6, and 11.3 microns) from the gas phase interstellar medium have long been attributed to polycyclic aromatic hydrocarbons (PAHs). A significant portion (10%-20%) of the Milky Way's carbon reservoir is locked in PAH molecules, which makes their characterization integral to our understanding of astrochemistry. In molecular clouds and the dense envelopes and disks of young stellar objects (YSOs), PAHs are expected to be frozen in the icy mantles of dust grains where they should reveal themselves through infrared absorption. To facilitate the search for frozen interstellar PAHs, laboratory experiments were conducted to determine the positions and strengths of the bands of pyrene mixed with H2O and D2O ices. The D2O mixtures are used to measure pyrene bands that are masked by the strong bands of H2O, leading to the first laboratory determination of the band strength for the CH stretching mode of pyrene in water ice near 3.25 microns. Our infrared band str...

Hardegree-Ullman, E E; Boogert, A C A; Lignell, H; Allamandola, L J; Stapelfeldt, K R; Werner, M

2014-01-01T23:59:59.000Z

44

Mobility of D atoms on porous amorphous water ice surfaces under interstellar conditions  

E-Print Network [OSTI]

Aims. The mobility of H atoms on the surface of interstellar dust grains at low temperature is still a matter of debate. In dense clouds, the hydrogenation of adsorbed species (i.e., CO), as well as the subsequent deuteration of the accreted molecules depend on the mobility of H atoms on water ice. Astrochemical models widely assume that H atoms are mobile on the surface of dust grains even if controversy still exists. We present here direct experimental evidence of the mobility of H atoms on porous water ice surfaces at 10 K. Methods. In a UHV chamber, O2 is deposited on a porous amorphous water ice substrate. Then D atoms are deposited onto the surface held at 10 K. Temperature-Programmed Desorption (TPD) is used and desorptions of O2 and D2 are simultaneously monitored. Results. We find that the amount of O2 that desorb during the TPD diminishes if we increase the deposition time of D atoms. O2 is thus destroyed by D atoms even though these molecules have previously diffused inside the pores of thick water ice. Our results can be easily interpreted if D is mobile at 10 K on the water ice surface. A simple rate equation model fits our experimental data and best fit curves were obtained for a D atoms diffusion barrier of 22(+-)2 meV. Therefore hydrogenation can take place efficiently on interstellar dust grains. These experimental results are in line with most calculations and validate the hypothesis used in several models.

E. Matar; E. Congiu; F. Dulieu; A. Momeni; J. L. Lemaire

2008-10-13T23:59:59.000Z

45

Strongly bonded water monomers on the ice Ih basal plane: Density-functional calculations  

Science Journals Connector (OSTI)

The adsorption of water monomers on noncrystallographic sites of the ice Ih basal plane is calculated from first principles. The results presented here do not support previous theoretical findings that state molecular adsorption energies in excess of the bulk cohesive energy. Still, due to an enhanced strength of the surface hydrogen bonds compared to the bulk, the admolecules are found to lower the ice surface energy. For the surface structures investigated here, the monomer adsorption energies are found to be rather insensitive with respect to the detailed microscopic structure of the underlying substrate. The latter, however, determines the adsorption-induced changes of the surface dipole layer.

C. Thierfelder; A. Hermann; P. Schwerdtfeger; W. G. Schmidt

2006-07-24T23:59:59.000Z

46

Mass-density and Phonon-frequency Relaxation Dynamics of Water and Ice at Cooling  

E-Print Network [OSTI]

Coulomb repulsion between the bonding electron pair in the H-O covalent bond (denoted by "-") and the nonbonding electron pair of O (":") and the specific-heat disparity between the O:H and the H-O segments of the entire hydrogen bond (O:H-O) are shown to determine the O:H-O bond angle-length-stiffness relaxation dynamics and the density anomalies of water and ice. The bonding part with relatively lower specific-heat is more easily activated by cooling, which serves as the "master" and contracts, while forcing the "slave" with higher specific-heat to elongate (via Coulomb repulsion) by different amounts. In the liquid and solid phases, the O:H van der Waals bond serves as the master and becomes significantly shorter and stiffer while the H-O bond becomes slightly longer and softer (phonon frequency is a measure of bond stiffness), resulting in an O:H-O cooling contraction and the seemingly "regular" process of cooling densification. In the water-ice transition phase, the master and the slave swap roles, thus resulting in an O:H-O elongation and volume expansion during freezing. In ice, the O--O distance is longer than it is in water, resulting in a lower density, so that ice floats.

Chang Q. Sun

2013-04-02T23:59:59.000Z

47

Nuclear quantum effects in liquid water from path-integral simulations using an ab initio force matching approach  

E-Print Network [OSTI]

We have applied path integral simulations, in combination with new ab initio based water potentials, to investigate nuclear quantum effects in liquid water. Because direct ab initio path integral simulations are computationally expensive, a flexible water model is parameterized by force-matching to density functional theory-based molecular dynamics simulations. The resulting effective potentials provide an inexpensive replacement for direct ab inito molecular dynamics simulations and allow efficient simulation of nuclear quantum effects. Static and dynamic properties of liquid water at ambient conditions are presented and the role of nuclear quantum effects, exchange-correlation functionals and dispersion corrections are discussed in regards to reproducing the experimental properties of liquid water.

Thomas Spura; Christopher John; Scott Habershon; Thomas D. Kühne

2014-02-06T23:59:59.000Z

48

Formation of Hydrogen, Oxygen, and Hydrogen Peroxide in Electron Irradiated Crystalline Water Ice  

E-Print Network [OSTI]

Water ice is abundant both astrophysically, for example in molecular clouds, and in planetary systems. The Kuiper belt objects, many satellites of the outer solar system, the nuclei of comets and some planetary rings are all known to be water-rich. Processing of water ice by energetic particles and ultraviolet photons plays an important role in astrochemistry. To explore the detailed nature of this processing, we have conducted a systematic laboratory study of the irradiation of crystalline water ice in an ultrahigh vacuum setup by energetic electrons holding a linear energy transfer of 4.3 +/- 0.1 keV mm-1. The irradiated samples were monitored during the experiment both on line and in situ via mass spectrometry (gas phase) and Fourier transform infrared spectroscopy (solid state). We observed the production of hydrogen and oxygen, both molecular and atomic, and of hydrogen peroxide. The likely reaction mechanisms responsible for these species are discussed. Additional formation routes were derived from the sublimation profiles of molecular hydrogen (90-140 K), molecular oxygen (147 -151 K) and hydrogen peroxide (170 K). We also present evidence on the involvement of hydroxyl radicals and possibly oxygen atoms as building blocks to yield hydrogen peroxide at low temperatures (12 K) and via a diffusion-controlled mechanism in the warming up phase of the irradiated sample.

Weijun Zheng; David Jewitt; Ralf I. Kaiser

2005-11-18T23:59:59.000Z

49

Ice-water and liquid-vapor phase transitions by a Ginzburg–Landau model  

Science Journals Connector (OSTI)

A model for the first order phase transitions as ice-water and liquid-vapor is proposed using the Ginzburg–Landau equation for the order parameter ? . In this model the density ? is composed of two quantities ? 0 and ? 1 such that 1 / ? = 1 / ? 0 + 1 / ? 1 where ? 1 is strictly connected to the order parameter ? . By means of this decomposition we are able to represent the Andrew diagram without the use of the heuristic van der Waals equation.

Mauro Fabrizio

2008-01-01T23:59:59.000Z

50

Neutron scattering from polycrystalline ice (Ih): Some keys to understanding the collective behavior of liquid water  

Science Journals Connector (OSTI)

The phonon dispersion in the second Brillouin zone of polycrystalline ice (Ih) has been measured. The results confirm the predictions of a previous lattice-dynamics calculation [A. Criado, F.J. Bermejo, M. García-Hernández, and J.L. Martínez, Phys. Rev. E 47, 3516 (1993)] where anomalously steep dispersion curves of an apparent acoustic origin were found. The relevance of the present findings for explaining some apparently anomalous features concerning the collective dynamics of liquid water is finally discussed.

F. J. Bermejo; E. Frikkee; M. García-Hernández; J. L. Martínez; A. Criado

1993-09-01T23:59:59.000Z

51

The interaction of radio frequency electromagnetic fields with atmospheric water droplets and application to aircraft ice prevention  

E-Print Network [OSTI]

In this work the physics of advanced microwave anti-icing systems, which pre-heat impinging supercooled water droplets prior to impact, is studied by means of a computer simulation and is found to be feasible. In order to ...

Hansman, Robert John

1982-01-01T23:59:59.000Z

52

THE RADIAL DISTRIBUTION OF WATER ICE AND CHROMOPHORES ACROSS SATURN'S SYSTEM  

SciTech Connect (OSTI)

Over the past eight years, the Visual and Infrared Mapping Spectrometer (VIMS) on board the Cassini orbiter has returned hyperspectral images in the 0.35-5.1 {mu}m range of the icy satellites and rings of Saturn. These very different objects show significant variations in surface composition, roughness, and regolith grain size as a result of their evolutionary histories, endogenic processes, and interactions with exogenic particles. The distributions of surface water ice and chromophores, i.e., organic and non-icy materials, across the Saturnian system, are traced using specific spectral indicators (spectral slopes and absorption band depths) obtained from rings mosaics and disk-integrated satellites observations by VIMS. Moving from the inner C ring to Iapetus, we found a marking uniformity in the distribution of abundance of water ice. On the other hand, the distribution of chromophores is much more concentrated in the rings particles and on the outermost satellites (Rhea, Hyperion, and Iapetus). A reduction of red material is observed on the satellites' surfaces orbiting within the E ring environment likely due to fine particles from Enceladus' plumes. Once the exogenous dark material covering the Iapetus' leading hemisphere is removed, the texture of the water ice-rich surfaces, inferred through the 2 {mu}m band depth, appears remarkably uniform across the entire system.

Filacchione, G.; Capaccioni, F.; Cerroni, P.; Tosi, F.; Ciarniello, M. [INAF-IAPS, Istituto di Astrofisica e Planetologia Spaziali, Area di Ricerca di Tor Vergata, via del Fosso del Cavaliere, 100, I-00133, Rome (Italy)] [INAF-IAPS, Istituto di Astrofisica e Planetologia Spaziali, Area di Ricerca di Tor Vergata, via del Fosso del Cavaliere, 100, I-00133, Rome (Italy); Clark, R. N. [Federal Center, US Geological Survey, Denver, CO 80228 (United States)] [Federal Center, US Geological Survey, Denver, CO 80228 (United States); Nicholson, P. D.; Lunine, J. I.; Hedman, M. M. [Astronomy Department, Cornell University, 418 Space Sciences Building, Ithaca, NY 14853 (United States)] [Astronomy Department, Cornell University, 418 Space Sciences Building, Ithaca, NY 14853 (United States); Cruikshank, D. P.; Cuzzi, J. N. [NASA Ames Research Center, Moffett Field, CA 94035-1000 (United States)] [NASA Ames Research Center, Moffett Field, CA 94035-1000 (United States); Brown, R. H. [Lunar Planetary Laboratory, University of Arizona, Kuiper Space Sciences 431A, Tucson, AZ 85721-0092 (United States)] [Lunar Planetary Laboratory, University of Arizona, Kuiper Space Sciences 431A, Tucson, AZ 85721-0092 (United States); Buratti, B. J. [NASA Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States)] [NASA Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States); Flamini, E., E-mail: gianrico.filacchione@iaps.inaf.it [ASI, Italian Space Agency, viale Liegi 26, I-00198 Rome (Italy)

2013-04-01T23:59:59.000Z

53

Optimizing the Probability of Flying in High Ice Water Content Conditions in the Tropics Using a Regional-Scale Climatology of Convective Cell Properties  

Science Journals Connector (OSTI)

In this paper, statistical properties of rainfall are derived from 14 years of Tropical Rainfall Measuring Mission data to optimize the use of flight hours for the upcoming High Altitude Ice Crystals (HAIC)/High Ice Water Content (HIWC) program. ...

A. Protat; S. Rauniyar; V. V. Kumar; J. W. Strapp

2014-11-01T23:59:59.000Z

54

A Compact, Backscattering Deplolarization Cloud Spectrometer for Ice and Water Discrimination  

SciTech Connect (OSTI)

This project was to develop a compact optical particle spectrometer, small enough for operation on UAVS, that measures the optical diameter of cloud hydrometeors and differentiates their water phase (liquid or solid). To reach this goal, a work plan was laid out that would complete three objectives: 1) Evaluation of designs for an optical particle spectrometer that measures the component of light backscattered at two polarization angles. 2) Testing of selected designs on an optical bench. 3) Construction and preliminary testing of a prototype instrument based on the selected, optimum design. A protoype instrument was developed and tested in an icing wind tunnel where the results showed good measurement of cloud droplets and ice particles.

Thomson, David

2014-05-15T23:59:59.000Z

55

Total reflection infrared spectroscopy of water-ice and frozen aqueous NaCl solutions  

SciTech Connect (OSTI)

Liquid-like and liquid water at and near the surface of water-ice and frozen aqueous sodium chloride films were observed using attenuated total reflection infrared spectroscopy (ATR-IR). The concentration of NaCl ranged from 0.0001 to 0.01 M and the temperature varied from the melting point of water down to 256 K. The amount of liquid brine at the interface of the frozen films with the germanium ATR crystal increased with salt concentration and temperature. Experimental spectra are compared to reflection spectra calculated for a simplified morphology of a uniform liquid layer between the germanium crystal and the frozen film. This morphology allows for the amount of liquid observed in an experimental spectrum to be converted to the thickness of a homogenous layer with an equivalent amount of liquid. These equivalent thickness ranges from a nanometer for water-ice at 260 K to 170 nm for 0.01 M NaCl close to the melting point. The amounts of brine observed are over an order of magnitude less than the total liquid predicted by equilibrium thermodynamic models, implying that the vast majority of the liquid fraction of frozen solutions may be found in internal inclusions, grain boundaries, and the like. Thus, the amount of liquid and the solutes dissolved in them that are available to react with atmospheric gases on the surfaces of snow and ice are not well described by thermodynamic equilibrium models which assume the liquid phase is located entirely at the surface.

Walker, Rachel L.; Searles, Keith; Willard, Jesse A.; Michelsen, Rebecca R. H., E-mail: RMichelsen@rmc.edu [Department of Chemistry, Randolph-Macon College, P.O. Box 5005, Ashland, Virginia 23005 (United States)] [Department of Chemistry, Randolph-Macon College, P.O. Box 5005, Ashland, Virginia 23005 (United States)

2013-12-28T23:59:59.000Z

56

Correlation between thermodynamic anomalies and pathways of ice nucleation in supercooled water  

SciTech Connect (OSTI)

The well-known classical nucleation theory (CNT) for the free energy barrier towards formation of a nucleus of critical size of the new stable phase within the parent metastable phase fails to take into account the influence of other metastable phases having density/order intermediate between the parent metastable phase and the final stable phase. This lacuna can be more serious than capillary approximation or spherical shape assumption made in CNT. This issue is particularly significant in ice nucleation because liquid water shows rich phase diagram consisting of two (high and low density) liquid phases in supercooled state. The explanations of thermodynamic and dynamic anomalies of supercooled water often invoke the possible influence of a liquid-liquid transition between two metastable liquid phases. To investigate both the role of thermodynamic anomalies and presence of distinct metastable liquid phases in supercooled water on ice nucleation, we employ density functional theoretical approach to find nucleation free energy barrier in different regions of phase diagram. The theory makes a number of striking predictions, such as a dramatic lowering of nucleation barrier due to presence of a metastable intermediate phase and crossover in the dependence of free energy barrier on temperature near liquid-liquid critical point. These predictions can be tested by computer simulations as well as by controlled experiments.

Singh, Rakesh S.; Bagchi, Biman, E-mail: bbagchi@sscu.iisc.ernet.in [Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012 (India)] [Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012 (India)

2014-04-28T23:59:59.000Z

57

Simulation of Ultra High Energy Neutrino Interactions in Ice and Water  

E-Print Network [OSTI]

The CORSIKA program, usually used to simulate extensive cosmic ray air showers, has been adapted to work in a water or ice medium. The adapted CORSIKA code was used to simulate hadronic showers produced by neutrino interactions. The simulated showers have been used to study the spatial distribution of the deposited energy in the showers. This allows a more precise determination of the acoustic signals produced by ultra high energy neutrinos than has been possible previously. The properties of the acoustic signals generated by such showers are described.

S. Bevan; S. Danaher; J. Perkin; S. Ralph; C. Rhodes; L. Thompson; T. Sloan; D. Waters

2007-04-08T23:59:59.000Z

58

Simulation of Ultra High Energy Neutrino Interactions in Ice and Water  

E-Print Network [OSTI]

The CORSIKA program, usually used to simulate extensive cosmic ray air showers, has been adapted to work in a water or ice medium. The adapted CORSIKA code was used to simulate hadronic showers produced by neutrino interactions. The simulated showers have been used to study the spatial distribution of the deposited energy in the showers. This allows a more precise determination of the acoustic signals produced by ultra high energy neutrinos than has been possible previously. The properties of the acoustic signals generated by such showers are described.

Bevan, S; Perkin, J; Ralph, S; Rhodes, C; Thompson, L; Sloan, T; Waters, D

2007-01-01T23:59:59.000Z

59

Detections of water ice, hydrocarbons, and 3.3um PAH in z~2 ULIRGs  

E-Print Network [OSTI]

We present the first detections of the 3um water ice and 3.4um amorphous hydrocarbon (HAC) absorption features in z~2 ULIRGs. These are based on deep rest-frame 2-8um Spitzer IRS spectra of 11 sources selected for their appreciable silicate absorption. The HAC-to-silicate ratio for our z~2 sources is typically higher by a factor of 2-5 than that observed in the Milky Way. This HAC `excess' suggests compact nuclei with steep temperature gradients as opposed to predominantly host obscuration. Beside the above molecular absorption features, we detect the 3.3um PAH emission feature in one of our sources with three more individual spectra showing evidence for it. Stacking analysis suggests that water ice, hydrocarbons, and PAH are likely present in the bulk of this sample even when not individually detected. The most unexpected result of our study is the lack of clear detections of the 4.67um CO gas absorption feature. Only three of the sources show tentative signs of this feature and at significantly lower levels...

Sajina, A; Yan, L; Imanishi, M; Fadda, D; Elitzur, M

2009-01-01T23:59:59.000Z

60

Water and ice structure in the range 220 - 365K from radiation total scattering experiments  

E-Print Network [OSTI]

The past decade or so has witnessed a large number of articles about water structure. The most incisive experiments involve radiation with a wavelength compatible with the observed inter-molecular separations found in water, of order $\\sim 3$\\AA, in other words mostly $$10keV x-rays. Because x-rays are scattered by electrons while neutrons are scattered by nuclei, the two probes give complementary information about the three site-site radial distribution functions for water, namely O-O, O-H and H-H. Here a version of Monte Carlo simulation called Empirical Potential Structure Refinement is used to devise an empirical intermolecular potential which attempts to drive the simulated radial distribution functions as close as possible to the data. New x-ray and neutron scattering data on water in the temperature range 280 - 365K are presented for the first time, alongside a new analysis of some much older neutron data on ice 1h at 220K. This temperature analysis, above and below the water freezing point of water, r...

Soper, Alan K

2014-01-01T23:59:59.000Z

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


61

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

E-Print Network [OSTI]

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

Andersen, M; Steinacker, J; Tothill, N

2014-01-01T23:59:59.000Z

62

Mars gets new icing  

Science Journals Connector (OSTI)

... north pole. Here the ice-cap shrinks each summer as a veneer of carbon dioxide burns off, revealing plenty of less volatile water ice beneath. The ice-cap at the ... beneath. The ice-cap at the red planet's south pole is covered with strange pits, called Swiss-cheese features. They have flat bottoms and steep sides; some are ...

Philip Ball

2003-02-14T23:59:59.000Z

63

Ice Concentration Retrieval in Stratiform Mixed-phase Clouds Using Cloud Radar Reflectivity Measurements and 1D Ice Growth Model Simulations  

SciTech Connect (OSTI)

Measurement of ice number concentration in clouds is important but still challenging. Stratiform mixed-phase clouds (SMCs) provide a simple scenario for retrieving ice number concentration from remote sensing measurements. The simple ice generation and growth pattern in SMCs offers opportunities to use cloud radar reflectivity (Ze) measurements and other cloud properties to infer ice number concentration quantitatively. To understand the strong temperature dependency of ice habit and growth rate quantitatively, we develop a 1-D ice growth model to calculate the ice diffusional growth along its falling trajectory in SMCs. The radar reflectivity and fall velocity profiles of ice crystals calculated from the 1-D ice growth model are evaluated with the Atmospheric Radiation Measurements (ARM) Climate Research Facility (ACRF) ground-based high vertical resolution radar measurements. Combining Ze measurements and 1-D ice growth model simulations, we develop a method to retrieve the ice number concentrations in SMCs at given cloud top temperature (CTT) and liquid water path (LWP). The retrieved ice concentrations in SMCs are evaluated with in situ measurements and with a three-dimensional cloud-resolving model simulation with a bin microphysical scheme. These comparisons show that the retrieved ice number concentrations are within an uncertainty of a factor of 2, statistically.

Zhang, Damao; Wang, Zhien; Heymsfield, Andrew J.; Fan, Jiwen; Luo, Tao

2014-10-01T23:59:59.000Z

64

Electric resistance of water films on the surface of ice near the phase transition temperature  

Science Journals Connector (OSTI)

The electric resistance of the surface layer of a polycrystalline ... ice melting, a monotonic decrease in the resistance of the ice surface changes to growth, ... of melting. In the growth stage, the resistance ...

G. S. Bordonski?; S. D. Krylov

2009-04-01T23:59:59.000Z

65

Nuclear quantum effects in water  

E-Print Network [OSTI]

In this work, a path integral Car-Parrinello molecular dynamics simulation of liquid water is performed. It is found that the inclusion of nuclear quantum effects systematically improves the agreement of first principles simulations of liquid water with experiment. In addition, the proton momentum distribution is computed utilizing a recently developed open path integral molecular dynamics methodology. It is shown that these results are in good agreement with neutron Compton scattering data for liquid water and ice.

Joseph A. Morrone; Roberto Car

2008-03-25T23:59:59.000Z

66

Ice Heating Up Cold Clouds | EMSL  

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

Ice Heating Up Cold Clouds Ice Heating Up Cold Clouds In a heated battle, ice crystals win the competition for cloud water vapor The mighty cloud ice crystal appears deceptively...

67

Real-time Non-contact Millimeter Wave Characterization of Water-Freezing and Ice-Melting Dynamics  

SciTech Connect (OSTI)

We applied millimeter wave radiometry for the first time to monitor water-freezing and ice-melting dynamics in real-time non-contact. The measurements were completed at a frequency of 137 GHz. Small amounts (about 2 mL) of freshwater or saltwater were frozen over a Peltier cooler and the freezing and melting sequence was recorded. Saltwater was prepared in the laboratory that contained 3.5% of table salt to simulate the ocean water. The dynamics of freezing-melting was observed by measuring the millimeter wave temperature as well as the changes in the ice or water surface reflectivity and position. This was repeated using large amounts of freshwater and saltwater (800 mL) mimicking glaciers. Millimeter wave surface level fluctuations indicated as the top surface melted, the light ice below floated up indicating lower surface temperature until the ice completely melted. Our results are useful for remote sensing and tracking temperature for potentially large-scale environmental applications, e.g., global warming.

Sundaram, S. K.; Woskov, Paul P.

2008-11-12T23:59:59.000Z

68

Solar Water Heater Roadmap Leads Path to Market Expansion (Fact Sheet)  

SciTech Connect (OSTI)

Innovative strategy to reduce installed cost of solar water heater systems can rival conventional natural gas water heaters in the marketplace.

Not Available

2012-09-01T23:59:59.000Z

69

Formation of high density amorphous ice by decompression of ice VII and ice VIII at 135 K  

E-Print Network [OSTI]

of ice Ih and are found to have very similar structures. By cooling liquid water along the water trans- forms into ice VIII when cooled . With this in mind Klug et al. were able to produce low densityFormation of high density amorphous ice by decompression of ice VII and ice VIII at 135 K Carl Mc

McBride, Carl

70

Arctic ice islands  

SciTech Connect (OSTI)

The development of offshore oil and gas resources in the Arctic waters of Alaska requires offshore structures which successfully resist the lateral forces due to moving, drifting ice. Ice islands are floating, a tabular icebergs, up to 60 meters thick, of solid ice throughout their thickness. The ice islands are thus regarded as the strongest ice features in the Arctic; fixed offshore structures which can directly withstand the impact of ice islands are possible but in some locations may be so expensive as to make oilfield development uneconomic. The resolution of the ice island problem requires two research steps: (1) calculation of the probability of interaction between an ice island and an offshore structure in a given region; and (2) if the probability if sufficiently large, then the study of possible interactions between ice island and structure, to discover mitigative measures to deal with the moving ice island. The ice island research conducted during the 1983-1988 interval, which is summarized in this report, was concerned with the first step. Monte Carlo simulations of ice island generation and movement suggest that ice island lifetimes range from 0 to 70 years, and that 85% of the lifetimes are less then 35 years. The simulation shows a mean value of 18 ice islands present at any time in the Arctic Ocean, with a 90% probability of less than 30 ice islands. At this time, approximately 34 ice islands are known, from observations, to exist in the Arctic Ocean, not including the 10-meter thick class of ice islands. Return interval plots from the simulation show that coastal zones of the Beaufort and Chukchi Seas, already leased for oil development, have ice island recurrences of 10 to 100 years. This implies that the ice island hazard must be considered thoroughly, and appropriate safety measures adopted, when offshore oil production plans are formulated for the Alaskan Arctic offshore. 132 refs., 161 figs., 17 tabs.

Sackinger, W.M.; Jeffries, M.O.; Lu, M.C.; Li, F.C.

1988-01-01T23:59:59.000Z

71

The value of agricultural water rights in agricultural properties in the path of development  

E-Print Network [OSTI]

Q19 R3 Keywords: Water rights Hedonic price method Urbanization Farmland prices Elasticity Marginal input in every sector of the econ- omy. In the U.S. Southwest, water demand has changed in response, Arizona. To do this we use hedonic pricing to explore the impact of water rights on property values in 151

72

Determination of Large-Scale Cloud Ice Water Concentration by Combining Surface Radar and Satellite Data in Support of ARM SCM Activities  

SciTech Connect (OSTI)

Single-column modeling (SCM) is one of the key elements of Atmospheric Radiation Measurement (ARM) research initiatives for the development and testing of various physical parameterizations to be used in general circulation models (GCMs). The data required for use with an SCM include observed vertical profiles of temperature, water vapor, and condensed water, as well as the large-scale vertical motion and tendencies of temperature, water vapor, and condensed water due to horizontal advection. Surface-based measurements operated at ARM sites and upper-air sounding networks supply most of the required variables for model inputs, but do not provide the horizontal advection term of condensed water. Since surface cloud radar and microwave radiometer observations at ARM sites are single-point measurements, they can provide the amount of condensed water at the location of observation sites, but not a horizontal distribution of condensed water contents. Consequently, observational data for the large-scale advection tendencies of condensed water have not been available to the ARM cloud modeling community based on surface observations alone. This lack of advection data of water condensate could cause large uncertainties in SCM simulations. Additionally, to evaluate GCMsâ�� cloud physical parameterization, we need to compare GCM results with observed cloud water amounts over a scale that is large enough to be comparable to what a GCM grid represents. To this end, the point-measurements at ARM surface sites are again not adequate. Therefore, cloud water observations over a large area are needed. The main goal of this project is to retrieve ice water contents over an area of 10 x 10 deg. surrounding the ARM sites by combining surface and satellite observations. Built on the progress made during previous ARM research, we have conducted the retrievals of 3-dimensional ice water content by combining surface radar/radiometer and satellite measurements, and have produced 3-D cloud ice water contents in support of cloud modeling activities. The approach of the study is to expand a (surface) point measurement to an (satellite) area measurement. That is, the study takes the advantage of the high quality cloud measurements (particularly cloud radar and microwave radiometer measurements) at the point of the ARM sites. We use the cloud ice water characteristics derived from the point measurement to guide/constrain a satellite retrieval algorithm, then use the satellite algorithm to derive the 3-D cloud ice water distributions within an 10�° (latitude) x 10�° (longitude) area. During the research period, we have developed, validated and improved our cloud ice water retrievals, and have produced and archived at ARM website as a PI-product of the 3-D cloud ice water contents using combined satellite high-frequency microwave and surface radar observations for SGP March 2000 IOP and TWP-ICE 2006 IOP over 10 deg. x 10 deg. area centered at ARM SGP central facility and Darwin sites. We have also worked on validation of the 3-D ice water product by CloudSat data, synergy with visible/infrared cloud ice water retrievals for better results at low ice water conditions, and created a long-term (several years) of ice water climatology in 10 x 10 deg. area of ARM SGP and TWP sites and then compared it with GCMs.

Liu, Guosheng

2013-03-15T23:59:59.000Z

73

Ice Fishing  

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

Ice Fishing Ice Fishing Nature Bulletin No. 327-A January 11, 1969 Forest Preserve District of Cook County Richard B. Ogilvie, President Roland F. Eisenbeis, Supt. of Conservation ICE FISHING We have a peculiar class of people known as the "Frosty-toed Tribe". As soon as winter comes and the ice permits, they put on all the clothes they own and what they can borrow, pack their automobiles with equipment, and start early in the morning for some inland body of water or a bay along one of the Great Lakes. Usually, two or three go together and they may drive 50 or 100 miles. For hours, even in below zero weather, they huddle around holes cut in the ice, fishing patiently, sustained by hope, hot coffee, and a lot of conversation. Some days a man may catch nothing. Other days he may bring home all the law allows. Sometimes he fishes vainly until almost sundown and then begins to haul them in, all of the same kind and size, as fast as he can re-bait his hook. In the meantime, other anglers have rushed over, cut holes, and are fishing all around him -- usually in vain, because one of the strange things about ice fishing is that, although you may catch fish out of one hole, you may get nothing out of another only a few feet from it, using the same kind of bait at the same depth. There are a lot of hotly contested theories but nobody knows why. After watching and questioning scores of ice fishermen, some of them noted for their prowess, we find that although each has his own secret techniques and favorite spots, good catches seem more a matter of luck than skill. Although they are sluggish and don't fight, fish caught in winter have the firmest flesh and finest flavor. The biggest thrill comes from the skillet.

74

Water-Cooled Ice Machines, Purchasing Specifications for Energy-Efficient Products (Fact Sheet), Federal Energy Management Program (FEMP)  

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

continued > continued > FEDERAL ENERGY MANAGEMENT PROGRAM PURCHASING SPECIFICATIONS FOR ENERGY-EFFICIENT PRODUCTS The U.S. Department of Energy's (DOE) Federal Energy Management Program (FEMP) facilitates the Federal Government's implementation of sound, cost-effective energy management and investment practices to enhance the nation's energy security and environmental stewardship. Water-Cooled Ice Machines Legal Authorities Federal agencies are required by the National Energy Conservation Policy Act (P.L. 95-619), Execu- tive Order 13423, Executive Order 13514, and Federal Acquisition Regulations (FAR) Subpart 23.2 and 53.223 to specify and buy ENERGY STAR ® qualified products or, in categories not included in

75

Groundwater Treatment at the Fernald Preserve: Status and Path Forward for the Water Treatment Facility - 12320  

SciTech Connect (OSTI)

Operating a water treatment facility at the Fernald Preserve in Cincinnati, Ohio-to support groundwater remediation and other wastewater treatment needs-has become increasingly unnecessary. The Fernald Preserve became a U.S. Department of Energy Office of Legacy Management (LM) site in November 2006, once most of the Comprehensive Environmental Response, Compensation, and Liability Act environmental remediation and site restoration had been completed. Groundwater remediation is anticipated to continue beyond 2020. A portion of the wastewater treatment facility that operated during the CERCLA cleanup continued to operate after the site was transferred to LM, to support the remaining groundwater remediation effort. The treatment facility handles the site's remaining water treatment needs (for groundwater, storm water, and wastewater) as necessary, to ensure that uranium discharge limits specified in the Operable Unit 5 Record of Decision are met. As anticipated, the need to treat groundwater to meet uranium discharge limits has greatly diminished over the last several years. Data indicate that the groundwater treatment facility is no longer needed to support the ongoing aquifer remediation effort. (authors)

Powel, J. [U.S. Department of Energy Office of Legacy Management, Harrison, Ohio (United States); Hertel, B.; Glassmeyer, C.; Broberg, K. [S.M. Stoller Corporation, Harrison, Ohio (United States)

2012-07-01T23:59:59.000Z

76

Monitoring of Precipitable Water Vapor and Cloud Liquid Path from Scanning Microwave Radiometers During the 2003 Cloudiness Inter-Comparison Experiment  

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

Monitoring of Precipitable Water Vapor and Cloud Liquid Monitoring of Precipitable Water Vapor and Cloud Liquid Path from Scanning Microwave Radiometers During the 2003 Cloudiness Inter-Comparison Experiment V. Mattioli Department of Electronic and Information Engineering University of Perugia Perugia, Italy E. R. Westwater Cooperative Institute for Research in Environmental Sciences University of Colorado National Oceanic and Atmospheric Administration Environmental Technology Laboratory Boulder, Colorado V. Morris Pacific Northwest National Laboratory Richland, Washington Introduction Ground-based microwave radiometers (MWR) are widely used to measure atmospheric precipitable water vapor (PWV) and cloud liquid path (CLP). Comparisons of PWV derived from MWRs with water vapor retrievals from instruments like radiosondes, Global Positioning System (GPS) and Raman

77

EVOLUTION OF SNOW LINE IN OPTICALLY THICK PROTOPLANETARY DISKS: EFFECTS OF WATER ICE OPACITY AND DUST GRAIN SIZE  

SciTech Connect (OSTI)

Evolution of a snow line in an optically thick protoplanetary disk is investigated with numerical simulations. The ice-condensing region in the disk is obtained by calculating the temperature and the density with the 1+1D approach. The snow line migrates as the mass accretion rate ( M-dot ) in the disk decreases with time. Calculations are carried out from an early phase with high disk accretion rates ( M-dot {approx}10{sup -7} M{sub sun} yr{sup -1}) to a later phase with low disk accretion rates ( M-dot {approx}10{sup -12} M{sub sun} yr{sup -1}) using the same numerical method. It is found that the snow line moves inward for M-dot {approx}>10{sup -10} M{sub sun} yr{sup -1}, while it gradually moves outward in the later evolution phase with M-dot {approx}<10{sup -10} M{sub sun} yr{sup -1}. In addition to the silicate opacity, the ice opacity is taken into consideration. In the inward migration phase, the additional ice opacity increases the distance of the snow line from the central star by a factor of 1.3 for dust grains {approx}< 10 {mu}m in size and of 1.6 for {approx}> 100 {mu}m. It is inevitable that the snow line comes inside Earth's orbit in the course of the disk evolution if the viscosity parameter {alpha} is in the range 0.001-0.1, the dust-to-gas mass ratio is higher than a tenth of the solar abundance value, and the dust grains are smaller than 1 mm. The formation of water-devoid planetesimals in the terrestrial planet region seems to be difficult throughout the disk evolution, which imposes a new challenge to planet formation theory.

Oka, Akinori; Nakamoto, Taishi; Ida, Shigeru, E-mail: akinorioka1@gmail.com, E-mail: nakamoto@geo.titech.ac.jp [Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo (Japan)

2011-09-10T23:59:59.000Z

78

Trapping of volatiles in amorphous water ice. R. M. E. Mastrapa , R. H. Brown  

E-Print Network [OSTI]

were re- leased into the sample chamber at the same pressure as the water, measurements will be taken with a solar system composition gas with the proper ratios of water to volatile. References: [1] Bar-Nun, A., G

Cohen, Barbara Anne

79

Cloud fraction, liquid and ice water contents derived from long-term radar, lidar, and microwave radiometer data are systematically compared to models to quantify and  

E-Print Network [OSTI]

Cloud fraction, liquid and ice water contents derived from long-term radar, lidar, and microwave a systematic evaluation of clouds in forecast models. Clouds and their associated microphysical processes for end users of weather forecasts, who may be interested not only in cloud cover, but in other variables

Hogan, Robin

80

Ice age paleotopography  

SciTech Connect (OSTI)

A gravitationally self-consistent theory of postglacial relative sea level change is used to infer the variation of surface ice and water cover since the Last Glacial Maximum (LGM). The results show that LGM ice volume was approximately 35 percent lower than suggested by the CLIMAP reconstruction and the maximum heights of the main Laurentian and Fennoscandian ice complexes are inferred to have been commensurately lower with respect to sea level. Use of these Ice Age boundary conditions in atmospheric general circulation models will yield climates that differ significantly from those previously inferred on the basis of the CLIMAP data set.

Peltier, W.R. (Univ. of Toronto, Ontario (Canada))

1994-07-08T23:59:59.000Z

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


81

The Post-Shock Chemical Lifetimes of Outflow Tracers and a Possible New Mechanism to Produce Water Ice Mantles  

E-Print Network [OSTI]

We have used a coupled time-dependent chemical and dynamical model to investigate the lifetime of the chemical legacy left in the wake of C-type shocks. We concentrate this study on the chemistry of H2O and O2, two molecules which are predicted to have abundances that are significantly affected in shock-heated gas. Two models are presented: (1) a three-stage model of pre-shock, shocked, and post-shock gas; and (2) a Monte-Carlo cloud simulation where we explore the effects of stochastic shock activity on molecular gas over a cloud lifetime. In agreement with previous studies, we find that shock velocities in excess of 10 km s^-1 are required to convert all of the oxygen not locked in CO into H2O before the gas has an opportunity to cool. For pure gas-phase models the lifetime of the high water abundances, or ``H2O legacy'', in the post-shock gas is 4 - 7 x 10^5 years. Through the Monte Carlo cloud simulation we demonstrate that the time-average abundance of H2O is a sensitive function of the frequency of shocks. Thus we predict that the abundance of H2O and other known outflow tracers can be used to trace the history of shock activity in molecular gas. For gas-grain models we find that the abundance of water-ice on grain surfaces can be quite large and is comparable to that observed in molecular clouds. This offers a possible alternative method to create water mantles without resorting to grain surface chemistry: gas heating and chemical modification due to a C-type shock and subsequent depletion of the gas-phase species onto grain mantles.

Edwin A. Bergin; Gary J. Melnick; David A. Neufeld

1998-03-30T23:59:59.000Z

82

Fish Smother Under Ice  

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

Smother Under Ice Smother Under Ice A BULLETIN FOR THE CHICAGO PUBLIC SCHOOLS DESIGNED FOR INCLUSION IN THE WEEKLY ANNOUNCEMENT SENT OUT FROM THE OFFICE OF SUPT. WILLIAM H. JOHNSON Clayton F. Smith, President Roberts Mann, Superintendent of Conservation February 1, 1945 Nature Bulletin No. 1 FOREST PRESERVE NOTES Grown-ups, who used to kive on a farm or in a small town, are fond of talking about the old-fashioned winters "when I was a boy" and the winters that grandpa used to tell about. Well, one would have to go back a long, long time to find a winter as severe as this one. FISH SMOTHER UNDER ICE Lakes and streams breathe the same as living things. When they are covered with ice and snow they cannot get air and they much hold their breath until the ice thaws. While they are holding their breath the oxygen in the water is gradually used up by the living things sealed up in it -- fish, plants "bugs", snails, and hosts of microscopic life. If the ice lasts long enough, these living things die one after another as each kind reaches the point where it cannot stand any further oxygen starvation. Sometimes temporary relief is given by rains and melting snow that bring fresh, serated water under the ice, but no method of artificial respiration has been found that works. Sometimes, too, when water plants get enough sunlight through clear ice they produce small amounts of oxygen and delay the suffocation of the fish, etc.; but when snow and cloudy ice cuts off the light this does not happen.

83

Love wave surface acoustic wave sensor for ice detection on aircraft  

Science Journals Connector (OSTI)

This paper presents the design fabrication experimental results and theoretical validation of a Love wave surface acoustic wave sensor for detecting the phase change from liquid water to solid ice. The sensing of this phase transition is due to the shear horizontal nature of Love waves which couple to a solid (ice) but not to a liquid (water). An SiO2 film of thickness 3.2 ?m deposited on an ST cut quartz wafer via plasma?enhanced chemical?vapor deposition acts as the guiding layer for Love waves. Testing is carried out with the water or ice placed directly in the propagation path of Love waves. An oscillation frequency shift of 2 MHz is observed when water on the sensor is frozen and melted cyclically. The contribution to the frequency shift is explained in terms of the acousto?electric effect (high permittivity and conductivity of water relative to ice) mass loading and elastic film formation (solid ice). An arrangement for wireless interrogation of the sensor is proposed which is particularly attractive for aircraft and rotorcraft applications obviating the need for complex wiring and local power sources. t

Vasundara V. Varadan; Sunil Gangadharan; Vijay K. Varadan

1999-01-01T23:59:59.000Z

84

Design of a Shadowband Spectral Radiometer for the Retrieval of Thin Cloud Optical Depth, Liquid Water Path, and the Effective Radius  

SciTech Connect (OSTI)

The design and operation of a Thin-Cloud Rotating Shadowband Radiometer (TCRSR) described here was used to measure the radiative intensity of the solar aureole and enable the simultaneous retrieval of cloud optical depth, drop effective radius, and liquid water path. The instrument consists of photodiode sensors positioned beneath two narrow metal bands that occult the sun by moving alternately from horizon to horizon. Measurements from the narrowband 415-nm channel were used to demonstrate a retrieval of the cloud properties of interest. With the proven operation of the relatively inexpensive TCRSR instrument, its usefulness for retrieving aerosol properties under cloud-free skies and for ship-based observations is discussed.

Bartholomew M. J.; Reynolds, R. M.; Vogelmann, A. M.; Min, Q.; Edwards, R.; Smith, S.

2011-11-01T23:59:59.000Z

85

A parameterisation of the flux and energy spectrum of single and multiple muons in the deep water or ice  

Science Journals Connector (OSTI)

Atmospheric muons play an important role in underwater/ice neutrino detectors. A parameterisation of the flux of single and multiple muon events, of their lateral distribution and energy spectrum is presented. The kinematics parameters were modelled starting from a full Monte Carlo simulation of the interaction of primary cosmic rays with atmospheric nuclei. The parametric formulas are valid for a vertical depth of 1.5–5 km w.e. and up to 85 ? for the zenith angle, and can be used as input for a fast simulation of atmospheric muons in underwater/ice detectors.

M. Spurio

2006-01-01T23:59:59.000Z

86

Calculation of the Cherenkov light yield from low energetic secondary particles accompanying high-energy muons in ice and water with Geant4 simulations  

Science Journals Connector (OSTI)

In this work we investigate and parameterize the amount and angular distribution of Cherenkov photons, which are generated by low-energy secondary particles (typically ? 500  MeV), which accompany a muon track in water or ice. These secondary particles originate from small energy loss processes. We investigate the contributions of the different energy loss processes as a function of the muon energy and the maximum transferred energy. For the calculation of the angular distribution we have developed a generic transformation method, which allows us to derive the angular distribution of Cherenkov photons for an arbitrary distribution of track directions and their velocities.

Leif Rädel; Christopher Wiebusch

2012-01-01T23:59:59.000Z

87

Comparison of Cloud Fraction and Liquid Water Path between ECMWF simulations and ARM long-term Observations at the NSA Site  

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

this poster, seasonal and annual variations of this poster, seasonal and annual variations of cloudiness and liquid water path (LWP) from European Center for Medium-Range Weather Forecasts (ECMWF) model were compared with surface measurement from the ARM Climate Research Facility (ARCF) North Slope of Alaska ( N S A ) s i t e b e t we e n J a n u a r y 1 9 9 9 and December 2004. ● Model simulated large scale features match well with observations. ● There are significant differences in cloud vertical and temporal distributions and in the magnitude. FIG. 1: Time-height display of cloud fraction from model simulations and observations in September 1999. ● Model overestimates high clouds, especially in warm seasons. ● Model makes close estimation for middle clouds. ● Model underestimates low clouds in warm seasons, especially in

88

Spectroscopic measurement of the vapour pressure of ice  

Science Journals Connector (OSTI)

...Murphy Meeting Issue Water in the gas phase . We...triple-point state of water and uses frequency-stabilized...temperature-regulated standard humidity generator, which contains ice...within 0.35 per cent. water vapour|ice vapour pressure...technical fields. In atmospheric physics, ice crystals...

2012-01-01T23:59:59.000Z

89

Extraction of the seabed critical angle using ice cracking noise as a signal source  

Science Journals Connector (OSTI)

A technique is described for measuring the reflection coefficient of the Arctic seabed with a single vertical array of hydrophones. Naturally occurring ice cracks were used as the acoustic sources. This method circumvents the difficulties and expense of introducing artificial sound sources through the thick Arctic pack ice. The measurements were made in April with a 22?element array suspended from the ice in 420 m of water. The range of the source is first determined using the direct arrival and multiple reflections from the seabed and under?ice surface. Then the directivity index is determined using the direct arrival path only. A plot of the reflection coefficient versus grazing angle clearly indicates the value of the critical angle. The sound speed of the sea bottom corresponding to this critical angle agrees well with that measured from a bottom grab sample taken during the field trip. Finally an interesting phenomenon was an anomalous increase of power at a grazing angle of 60°. This is associated with a leaky plate wave radiating at the ice?water interface.

Pierre Zakarauskas; Ronald I. Verrall; Michael V. Greening

1990-01-01T23:59:59.000Z

90

GREAT LAKES ICE COVER RaymondA. Asset'  

E-Print Network [OSTI]

hydropower production and cooling water intakes, and damaging shore structures. Ice cover also impactsChapter 6 GREAT LAKES ICE COVER RaymondA. Asset' ABSTRACT: Theformation of ice on the Lallrentian (~rthe Great Lakes anel local weather and climate. The (I1Inllal seasonal and ~'Patialprogression of ice

91

Water Ice, Silicate, and Polycyclic Aromatic Hydrocarbon Emission Features in the Infrared Space Observatory Spectrum of the Carbon-Rich Planetary Nebula CPD -56 degree 8032  

E-Print Network [OSTI]

Combined ISO SWS and LWS spectroscopy is presented of the late WC-type planetary nebula nucleus CPD-56 8032 and its carbon-rich nebula. The extremely broad coverage (2.4-197 microns) enables us to recognize the clear and simultaneous presence of emission features from both oxygen- and carbon- rich circumstellar materials. Removing a smooth continuum highlights bright emission bands characteristic of polycyclic aromatic hydrocarbons (hereafter PAHs) in the 3-14 micron region, bands from crystalline silicates longwards of 18 microns, and the 43- and 62-micron bands of crystalline water ice. We discuss the probable evolutionary state and history of this unusual object in terms of (a) a recent transition from an O-rich to a C-rich outflow following a helium shell flash; or (b) a carbon-rich nebular outflow encountering an O-rich comet cloud.

Cohen, M; Sylvester, R J; Liu, X W; Cox, P; Lim, T; Schmitt, B; Speck, A K; Cohen, Martin

1999-01-01T23:59:59.000Z

92

Water Ice, Silicate and PAH Emission Features in the ISO Spectrum of the Carbon-rich Planetary Nebula CPD-56 8032  

E-Print Network [OSTI]

Combined ISO SWS and LWS spectroscopy is presented of the late WC-type planetary nebula nucleus CPD-56 8032 and its carbon-rich nebula. The extremely broad coverage (2.4-197 microns) enables us to recognize the clear and simultaneous presence of emission features from both oxygen- and carbon- rich circumstellar materials. Removing a smooth continuum highlights bright emission bands characteristic of polycyclic aromatic hydrocarbons (hereafter PAHs) in the 3-14 micron region, bands from crystalline silicates longwards of 18 microns, and the 43- and 62-micron bands of crystalline water ice. We discuss the probable evolutionary state and history of this unusual object in terms of (a) a recent transition from an O-rich to a C-rich outflow following a helium shell flash; or (b) a carbon-rich nebular outflow encountering an O-rich comet cloud.

Martin Cohen; M. J. Barlow; R. J. Sylvester; X. -W. Liu; P. Cox; T. Lim; B. Schmitt; A. K. Speck

1999-01-11T23:59:59.000Z

93

Energy Cost Calculator for Commercial Ice Machines | Department of Energy  

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

Ice Machines Ice Machines Energy Cost Calculator for Commercial Ice Machines October 8, 2013 - 2:25pm Addthis Vary capacity size, energy cost, hours of operation, and /or efficiency level. INPUT SECTION Input the following data (if any parameter is missing, calculator will set to default value). Defaults Type of Ice Cube Machine Ice Making Head Self-Contained Remote Condensing Unit Ice Making Head Type of Condenser Air Cooled Water Cooled Air Cooled Ice Harvest Rate (lbs. ice per 24 hrs.) lbs. per 24 hrs. 500 lbs. per 24 hrs. Energy Consumption (per 100 lbs. of ice) kWh 5.5 kWh Quantity of ice machines to be purchased 1 Energy Cost $/kWh 0.06 $/kWh Annual Hours of Operation hrs. 3000 hrs. Calculate Reset OUTPUT SECTION Performance per Ice Cube Machine Your

94

Extraction of the seabed reflectivity function using ice cracking noise as a signal source  

Science Journals Connector (OSTI)

A technique is described for measuring the reflection coefficient of the Arctic seabed with a single vertical array of hydrophones. Naturally occurring icecrackingnoises were used as the acoustic sources. This method circumvents the difficulties and expense of introducing artificial sound sources through the thick Arctic pack ice. The measurements were made in April 1988 with a 22?element array suspended from the ice in 420 m of water. The range of the source is first determined using the direct arrival and multiple reflections from the seabed and underice surface. Then the source directivity is parametrized using the direct arrival path only and extrapolated to reflected path angles. A plot of the reflection coefficient versus grazing angle clearly indicates the value of the critical angle. The sound speed of the sea bottom corresponding to this critical angle agrees well with that measured from a bottom grab sample taken during the field trip. Finally an interesting phenomenon was an anomalous increase of the received pressure level around a grazing angle of 60°. This is associated with a leaky plate wave radiating at the ice–water interface.

Pierre Zakarauskas; Ronald I. Verrall; Michael V. Greening

1993-01-01T23:59:59.000Z

95

On the scatteringgreenhouse effect of CO 2 ice clouds  

E-Print Network [OSTI]

that young Mars was warm enough to support flowing water present a continuing enigma (Squyres and Kasting 1994). Kasting (1991) showed that, owing to the effects of CO 2 condensation on temperature lapse rate the optical effects of CO 2 ­ice clouds, but remarked that because CO 2 ­ice (unlike water­ice) has very low

Pierrehumbert, Raymond

96

Hidden force floating ice  

E-Print Network [OSTI]

Because of the segmental specific-heat disparity of the hydrogen bond (O:H-O) and the Coulomb repulsion between oxygen ions, cooling elongates the O:H-O bond at freezing by stretching its containing angle and shortening the H-O bond with an association of larger O:H elongation, which makes ice less dense than water, allowing it to float.

Chang Q. Sun

2015-01-17T23:59:59.000Z

97

ARM - Measurement - Liquid water path  

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

Cloud Products Using Visst Algorithm PRECIPRET : Precipitation Retrievals WRF-CHEM : Weather Research and Forecasting (WRF) Model Output Value-Added Products MWRAVG :...

98

Interactions of Water and Energy Mediate Responses of High-Latitude Terrestrial Ecosystems to Climate Change  

E-Print Network [OSTI]

air, water, and ice content, snow insulation is modeledinhibition of ice formation from snow insulation (Brown andeliminating snow insulation caused declines in ice surface

Subin, Zachary Marc

2012-01-01T23:59:59.000Z

99

Intercomparison of the Cloud Water Phase among Global Climate Models  

SciTech Connect (OSTI)

Mixed-phase clouds (clouds that consist of both cloud droplets and ice crystals) are frequently present in the Earth’s atmosphere and influence the Earth’s energy budget through their radiative properties, which are highly dependent on the cloud water phase. In this study, the phase partitioning of cloud water is compared among six global climate models (GCMs) and with Cloud and Aerosol Lidar with Orthogonal Polarization retrievals. It is found that the GCMs predict vastly different distributions of cloud phase for a given temperature, and none of them are capable of reproducing the spatial distribution or magnitude of the observed phase partitioning. While some GCMs produced liquid water paths comparable to satellite observations, they all failed to preserve sufficient liquid water at mixed-phase cloud temperatures. Our results suggest that validating GCMs using only the vertically integrated water contents could lead to amplified differences in cloud radiative feedback. The sensitivity of the simulated cloud phase in GCMs to the choice of heterogeneous ice nucleation parameterization is also investigated. The response to a change in ice nucleation is quite different for each GCM, and the implementation of the same ice nucleation parameterization in all models does not reduce the spread in simulated phase among GCMs. The results suggest that processes subsequent to ice nucleation are at least as important in determining phase and should be the focus of future studies aimed at understanding and reducing differences among the models.

Komurcu, Muge; Storelvmo, Trude; Tan, Ivy; Lohmann, U.; Yun, Yuxing; Penner, Joyce E.; Wang, Yong; Liu, Xiaohong; Takemura, T.

2014-03-27T23:59:59.000Z

100

A parameterisation of the flux and energy spectrum of single and multiple muons in deep water/ice  

E-Print Network [OSTI]

In this paper parametric formulas are presented to evaluate the flux of atmospheric muons in the range of vertical depth between 1.5 to 5 km of water equivalent (km w.e.) and up to 85^o for the zenith angle. We take into account their arrival in bundles with different muon multiplicities. The energy of muons inside bundles is then computed considering the muon distance from the bundle axis. This parameterisation relies on a full Monte Carlo simulation of primary Cosmic Ray (CR) interactions, shower propagation in the atmosphere and muon transport in deep water [1]. The primary CR flux and interaction models, in the range in which they can produce muons which may reach 1.5 km w.e., suffer from large experimental uncertainties. We used a primary CR flux and an interaction model able to correctly reproduce the flux, the multiplicity distribution, the spatial distance between muons as measured by the underground MACRO experiment.

M. Bazzotti; S. Biagi; G. Carminati; S. Cecchini; T. Chiarusi; G. Giacomelli; A. Margiotta; M. Sioli; M. Spurio

2009-10-22T23:59:59.000Z

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


101

A parameterisation of the flux and energy spectrum of single and multiple muons in deep water/ice  

E-Print Network [OSTI]

In this paper parametric formulas are presented to evaluate the flux of atmospheric muons in the range of vertical depth between 1.5 to 5 km of water equivalent (km w.e.) and up to 85^o for the zenith angle. We take into account their arrival in bundles with different muon multiplicities. The energy of muons inside bundles is then computed considering the muon distance from the bundle axis. This parameterisation relies on a full Monte Carlo simulation of primary Cosmic Ray (CR) interactions, shower propagation in the atmosphere and muon transport in deep water [1]. The primary CR flux and interaction models, in the range in which they can produce muons which may reach 1.5 km w.e., suffer from large experimental uncertainties. We used a primary CR flux and an interaction model able to correctly reproduce the flux, the multiplicity distribution, the spatial distance between muons as measured by the underground MACRO experiment.

Bazzotti, M; Carminati, G; Cecchini, S; Chiarusi, T; Giacomelli, G; Margiotta, A; Sioli, M; Spurio, M

2009-01-01T23:59:59.000Z

102

The convective desalination of sea ice  

E-Print Network [OSTI]

containing both liquid brine and solid (pure water) ice. Frad is the flux of penetrating solar radiation. Thus the thermal properties of sea ice are composed of those of the solid and liquid phases that make up sea ice. Fixed-salinity models used in older... components of the physical climate system. Evolving in space and time, sea ice has thermal and mechanical properties that must be updated dynamically for a faithful representation within climate models. Such models are vital tools to help people everywhere...

Rees Jones, David

2014-07-01T23:59:59.000Z

103

The influence of ice nucleation mode and ice vapor growth on simulation of  

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

The influence of ice nucleation mode and ice vapor growth on simulation of The influence of ice nucleation mode and ice vapor growth on simulation of arctic mixed-phase clouds Avramov, Alexander The Pennsylvania State University Category: Modeling Mixed-phase arctic stratus clouds are the predominant cloud type in the Arctic . Perhaps one of the most intriguing of their features is that they tend to have liquid tops that precipitate ice. Despite the fact that this situation is colloidally unstable, these cloud systems are quite long lived - from a few days to over a couple of weeks. Previous studies have suggested that this longevity may be due to a paucity of ice nucleating aerosols (ice nuclei, or IN) in the Arctic. Such studies have shown that small changes in IN concentrations can cause large changes in the amount of liquid water within a mixed-phase stratus deck. We use the Regional

104

Stresses generated in cooling viscoelastic ice shells: Application to Europa  

E-Print Network [OSTI]

Stresses generated in cooling viscoelastic ice shells: Application to Europa F. Nimmo Department to cooling and the expansion of the shell due to the ice-water volume change. The former effect generates Citation: Nimmo, F. (2004), Stresses generated in cooling viscoelastic ice shells: Application to Europa, J

Nimmo, Francis

105

Bonding and Electronic Properties of Ice at High Pressure  

E-Print Network [OSTI]

between the nearest oxygen atoms. All ice structures that we discussed so far are insulators. Militzer 1 Bonding and Electronic Properties of Ice at High Pressure B. Militzer Department of Earth of water ice at megabar pressure are characterized with ab initio computer simulations. The focus lies

Militzer, Burkhard

106

Correspondence Laboratory observations of debris-bearing ice facies frozen  

E-Print Network [OSTI]

, others argue that supercooling is not the only mechanism for producing thick basal ice sequencesCorrespondence Laboratory observations of debris-bearing ice facies frozen from supercooled water. Supercooling has been invoked to explain anomalously thick basal ice sequences beneath temperate glaciers

Knight, Peter G.

107

Neutron Diffraction of Ice in Hydrogels  

Science Journals Connector (OSTI)

Neutron Diffraction of Ice in Hydrogels ... (14, 15) Neutrons are also especially suited for studying D2O water in hydrogels because hydrogen atoms (H) on the polymer chains are not detectable. ...

Yurina Sekine; Tomoko Ikeda-Fukazawa; Mamoru Aizawa; Riki Kobayashi; Songxue Chi; Jaime A. Fernandez-Baca; Hiroki Yamauchi; Hiroshi Fukazawa

2014-08-26T23:59:59.000Z

108

Weakening of ice by magnesium perchlorate hydrate  

E-Print Network [OSTI]

I show that perchlorate hydrates, which have been indirectly detected at high Martian circumpolar latitudes by the Phoenix Mars Lander, have a dramatic effect upon the rheological behavior of polycrystalline water ice under ...

Lenferink, Hendrik J., 1985-

2012-01-01T23:59:59.000Z

109

Kinetics of electron-induced decomposition of CF{sub 2}Cl{sub 2} coadsorbed with water (ice): A comparison with CCl{sub 4}  

SciTech Connect (OSTI)

The kinetics of decomposition and subsequent chemistry of adsorbed CF{sub 2}Cl{sub 2}, activated by low-energy electron irradiation, have been examined and compared with CCl{sub 4}. These molecules have been adsorbed alone and coadsorbed with water ice films of different thicknesses on metal surfaces (Ru; Au) at low temperatures (25 K; 100 K). The studies have been performed with temperature programmed desorption (TPD), reflection absorption infrared spectroscopy (RAIRS), and x-ray photoelectron spectroscopy (XPS). TPD data reveal the efficient decomposition of both halocarbon molecules under electron bombardment, which proceeds via dissociative electron attachment (DEA) of low-energy secondary electrons. The rates of CF{sub 2}Cl{sub 2} and CCl{sub 4} dissociation increase in an H{sub 2}O (D{sub 2}O) environment (2-3x), but the increase is smaller than that reported in recent literature. The highest initial cross sections for halocarbon decomposition coadsorbed with H{sub 2}O, using 180 eV incident electrons, are measured (using TPD) to be 1.0{+-}0.2x10{sup -15} cm{sup 2} for CF{sub 2}Cl{sub 2} and 2.5{+-}0.2x10{sup -15} cm{sup 2} for CCl{sub 4}. RAIRS and XPS studies confirm the decomposition of halocarbon molecules codeposited with water molecules, and provide insights into the irradiation products. Electron-induced generation of Cl{sup -} and F{sup -} anions in the halocarbon/water films and production of H{sub 3}O{sup +}, CO{sub 2}, and intermediate compounds COF{sub 2} (for CF{sub 2}Cl{sub 2}) and COCl{sub 2}, C{sub 2}Cl{sub 4} (for CCl{sub 4}) under electron irradiation have been detected using XPS, TPD, and RAIRS. The products and the decomposition kinetics are similar to those observed in our recent experiments involving x-ray photons as the source of ionizing irradiation.

Faradzhev, N.S.; Perry, C.C.; Kusmierek, D.O.; Fairbrother, D.H.; Madey, T.E. [Department of Physics and Astronomy, and Laboratory for Surface Modification, Rutgers, State University of New Jersey, Piscataway, New Jersey 08854-8019 (United States); Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218 (United States); Department of Physics and Astronomy, and Laboratory for Surface Modification, Rutgers, State University of New Jersey, Piscataway, New Jersey 08854-8019 (United States); Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218 (United States); Department of Physics and Astronomy, and Laboratory for Surface Modification, Rutgers, State University of New Jersey, Piscataway, New Jersey 08854-8019 (United States)

2004-11-01T23:59:59.000Z

110

The Post-Shock Chemical Lifetimes of Outflow Tracers and a Possible New Mechanism to Produce Water Ice Mantles  

E-Print Network [OSTI]

We have used a coupled time-dependent chemical and dynamical model to investigate the lifetime of the chemical legacy left in the wake of C-type shocks. We concentrate this study on the chemistry of H2O and O2, two molecules which are predicted to have abundances that are significantly affected in shock-heated gas. Two models are presented: (1) a three-stage model of pre-shock, shocked, and post-shock gas; and (2) a Monte-Carlo cloud simulation where we explore the effects of stochastic shock activity on molecular gas over a cloud lifetime. In agreement with previous studies, we find that shock velocities in excess of 10 km s^-1 are required to convert all of the oxygen not locked in CO into H2O before the gas has an opportunity to cool. For pure gas-phase models the lifetime of the high water abundances, or ``H2O legacy'', in the post-shock gas is 4 - 7 x 10^5 years. Through the Monte Carlo cloud simulation we demonstrate that the time-average abundance of H2O is a sensitive function of the frequency of shoc...

Bergin, E A; Neufeld, D A; Bergin, Edwin A.; Melnick, Gary J.; Neufeld, David A.

1998-01-01T23:59:59.000Z

111

Flight Path 12  

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

This flight path is located in experiment building ER-2 (MPF-30) at the Manual Lujan Jr. Neutron Scattering Center at LANSCE. . Target 1 Flight Path 12 (1FP12) Target 1 Flight...

112

1 Microscopic and environmental controls on the spacing and thickness of segregated 2 ice lenses  

E-Print Network [OSTI]

water, and ice conspire with the prevailing environmental conditions 52 to produce macroscopic ice by Henry (2000). The first comprehensive and tractable model 57 for ice lens growth was produced by O1 Microscopic and environmental controls on the spacing and thickness of segregated 2 ice lenses 3

Rempel, Alan W.

113

On the phase diagram of water with density functional theory potentials: the melting temperature of Ice I-h with the Perdew-Burke-Ernzerhof and Becke-Lee-Yang-Parr functionals  

SciTech Connect (OSTI)

The melting temperature (Tm) of ice Ih was determined from constant enthalphy (NPH) Born-Oppenheimer Molecular Dynamics (BOMD) simulations to be 417±3 K for the Perdew-Burke-Ernzerhof (PBE) and 411±4 K for the Becke-Lee-Yang-Parr (BLYP) density functionals using a coexisting ice (Ih)-liquid phase at constant pressures of P = 2,500 and 10,000 bar and a density ? = 1 g/cm3, respectively. This suggests that ambient condition simulations at ? = 1 g/cm3 will rather describe a supercooled state that is overstructured when compared to liquid water. This work was supported by the US Department of Energy Office of Basic Energy Sciences' Chemical Sciences program. Pacific Northwest National Laboratory is operated by Battelle for the US Department of Energy.

Yoo, Soohaeng; Zeng, Xiao Cheng; Xantheas, Sotiris S.

2009-06-11T23:59:59.000Z

114

ICE CORE RECORDS | Greenland Stable Isotopes  

Science Journals Connector (OSTI)

Abstract Greenland ice cores contain a wealth of information on past climatic conditions throughout the Northern Hemisphere. A historical perspective on the climatic interpretation of stable isotopes in water and ice is presented in the introduction, while the remainder of the article is devoted to the current interpretation of stable isotope data from Greenland ice cores. The progress in our understanding of stable isotope signals, on timescales from seasons to glacial cycles, is discussed and evaluated through numerous examples from Greenland ice cores. Stable isotope profiles from the Camp Century, Dye-3, GISP2, GRIP, NGRIP, and Renland deep ice cores are emphasized, as they all provide climatic information dating back into the Eemian period.

B.M. Vinther; S.J. Johnsen

2013-01-01T23:59:59.000Z

115

Ultrafast photochemistry of methyl hydroperoxide on ice particles  

E-Print Network [OSTI]

Ultrafast photochemistry of methyl hydroperoxide on ice particles M. A. Kambouresa , S. AOOH, on water clusters produces a surprisingly wide range of products on a subpicosecond time scale | photodissociation Photoinduced processes at surfaces of water or ice are of interest in atmospheric chemistry

Nizkorodov, Sergey

116

Chlorine-36 in Water, Snow, and Mid-Latitude Glacial Ice of North America: Meteoric and Weapons-Tests Production in the Vicinity of the Idaho National Engineering and Environmental Laboratory, Idaho  

SciTech Connect (OSTI)

Measurements of chlorine-36 (36Cl) were made for 64 water, snow, and glacial-ice and -runoff samples to determine the meteoric and weapons-tests-produced concentrations and fluxes of this radionuclide at mid-latitudes in North America. The results will facilitate the use of 36Cl as a hydrogeologic tracer at the Idaho National Engineering and Environmental Laboratory (INEEL). This information was used to estimate meteoric and weapons-tests contributions of this nuclide to environmental inventories at and near the INEEL. The data presented in this report suggest a meteoric source 36Cl for environmental samples collected in southeastern Idaho and western Wyoming if the concentration is less than 1 x 10 7 atoms/L. Additionally, concentrations in water, snow, or glacial ice between 1 x 10 7 and 1 x 10 8 atoms/L may be indicative of a weapons-tests component from peak 36Cl production in the late 1950s. Chlorine-36 concentrations between 1 x 10 8 and 1 x 10 9 atoms/L may be representative of re-suspension of weapons-tests fallout airborne disposal of 36Cl from the INTEC, or evapotranspiration. It was concluded from the water, snow, and glacial data presented here that concentrations of 36Cl measured in environmental samples at the INEEL larger than 1 x 10 9 atoms/L can be attributed to waste-disposal practices.

L. DeWayne; J. R. Green (USGS); S. Vogt, P. Sharma (Purdue University); S. K. Frape (University of Waterloo); S. N. Davis (University of Arizona); G. L. Cottrell (USGS)

1999-01-01T23:59:59.000Z

117

PET 424304 2013 Exercises 1+2 of 4 17 Jan + 31 Jan 2013 1. 1kg ice at 263 K 1 kg water at 293 K. Heat Q at T = T is supplied by the surroundings.  

E-Print Network [OSTI]

. Heat Q at T = T° is supplied by the surroundings. Specific heat ice : ci = 2,14 kJ/(kgK); water cw = 4,18 kJ/(kgK) melting heat mH = 333,4 kJ/kg 2nd Law: m.sin + Qin/Tin + Sgen = dS/dt + m.sout + Qout)·cw. = 438,4 kJ (per kg) S/m = s = ci·ln(273/263) + melth / 273 + cw·ln(293/273) = 1,6 kJ/(kgK) using

Zevenhoven, Ron

118

Frostbite Theater - Liquid Nitrogen Experiments - Dry Ice vs. Liquid  

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

Egg + Liquid Nitrogen + Time-lapse! Egg + Liquid Nitrogen + Time-lapse! Previous Video (Egg + Liquid Nitrogen + Time-lapse!) Frostbite Theater Main Index Next Video (Liquid Nitrogen Cooled Dry Ice in Water!) Liquid Nitrogen Cooled Dry Ice in Water! Dry Ice vs. Liquid Nitrogen! Dry ice is cold. Liquid nitrogen is cold, too. What happens when the two are mixed together? [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: Have you ever wondered what happens when you mix dry ice and liquid nitrogen? Steve: Well, we just happen to have a chunk of dry ice left over from when we filmed 'How to Make a Cloud Chamber,' and here at Jefferson Lab, liquid nitrogen flows like water, so we're going to find out!

119

Path Forward Introduction -- Moussa  

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

External Coordination Working Group Presented by: Frank Moussa Office of Logistics Management February 7, 2008 San Antonio, TX 2 Path Forward * TEC is an ongoing...

120

Great Lakes Ice Cycle Primary Investigator: Raymond Assel -NOAA GLERL (Emeritus)  

E-Print Network [OSTI]

and cooling water intakes, and damaging shoreline structures. The ice cover also has an impact on the waterGreat Lakes Ice Cycle Primary Investigator: Raymond Assel - NOAA GLERL (Emeritus) Co Board The formation, duration, and extent of ice cover on the Great Lakes has a major impact

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


121

Regelation: why does ice melt under pressure?  

E-Print Network [OSTI]

Unlike other unusual materials whose bonds contract under compression, the O:H nonbond undergoes contraction and the H-O bond elongation towards O:H and H-O length symmetry in water and ice. The energy drop of the H-O bond dictates the melting point Tm depression of ice. Once the pressure is relieved, the O:H-O bond fully recovers its initial state, resulting in Regelation.

Sun, Chang Q

2015-01-01T23:59:59.000Z

122

Ice nanoclusters at hydrophobic metal surfaces  

E-Print Network [OSTI]

and characterization of metal-supported water hexamers and a family of hydrated nanoclusters-- heptamers, octamers to nucleate through the presence of an `ice nucleating agent': a microscopic seed particle of salt, sand or such as the formation of new water structures not observed in the gas phase, altered H-bond strengths or different

123

Ising model for melt ponds on Arctic sea ice  

E-Print Network [OSTI]

The albedo of melting Arctic sea ice, a key parameter in climate modeling, is determined by pools of water on the ice surface. Recent observations show an onset of pond complexity at a critical area of about 100 square meters, attended by a transition in pond fractal dimension. To explain this behavior and provide a statistical physics approach to sea ice modeling, we introduce a two dimensional Ising model for pond evolution which incorporates ice-albedo feedback and the underlying thermodynamics. The binary magnetic spin variables in the Ising model correspond to the presence of melt water or ice on the sea ice surface. The model exhibits a second-order phase transition from isolated to clustered melt ponds, with the evolution of pond complexity in the clustered phase consistent with the observations.

Ma, Y -P; Golden, K M

2014-01-01T23:59:59.000Z

124

Minimalist Model of Ice Microphysics in Mixed-phase Stratiform Clouds  

SciTech Connect (OSTI)

The question of whether persistent ice crystal precipitation from super cooled layer clouds can be explained by time-dependent, stochastic ice nucleation is explored using an approximate, analytical model, and a large-eddy simulation (LES) cloud model. The updraft velocity in the cloud defines an accumulation zone, where small ice particles cannot fall out until they are large enough, which will increase the residence time of ice particles in the cloud. Ice particles reach a quasi-steady state between growth by vapor deposition and fall speed at cloud base. The analytical model predicts that ice water content (wi) has a 2.5 power law relationship with ice number concentration ni. wi and ni from a LES cloud model with stochastic ice nucleation also confirm the 2.5 power law relationship. The prefactor of the power law is proportional to the ice nucleation rate, and therefore provides a quantitative link to observations of ice microphysical properties.

Yang, F.; Ovchinnikov, Mikhail; Shaw, Raymond A.

2013-07-28T23:59:59.000Z

125

The Ability of MM5 to Simulate Ice Clouds: Systematic Comparison between Simulated and Measured Fluxes and Lidar/Radar Profiles at the  

E-Print Network [OSTI]

to produce too much solid water (ice and snow) and not enough liquid water. 1. Introduction Ice clouds playThe Ability of MM5 to Simulate Ice Clouds: Systematic Comparison between Simulated and Measured­NCAR Mesoscale Model (MM5) to simulate midlatitude ice clouds is evaluated. Model outputs are compared to long

Protat, Alain

126

Analytical determination of propeller performance degradation due to ice accretion  

E-Print Network [OSTI]

trajectory code. Unlike the Bragg code, the effects of compressibility, kinetic heating, and water runback are taken into account in this code, thus making it applicable to both rime and glaze ice conditions. Designed to be applied to helicopter config...- ' urations, the code employs a heat balance analysis to calculate the kinetic heating and runback effects. The authors have reported good agreement between predicted and experimentally obtained ice shapes, tem- perature distributions, and icing threshold...

Miller, Thomas Lloyd

1984-01-01T23:59:59.000Z

127

New ice rules for nanoconfined monolayer ice from first principles  

E-Print Network [OSTI]

Understanding the structural tendencies of nanoconfined water is of great interest for nanoscience and biology, where nano/micro-sized objects may be separated by very few layers of water. Here we investigate the properties of ice confined to a quasi-2D monolayer by a featureless, chemically neutral potential, using density-functional theory simulations with a non-local van der Waals density functional. An ab initio random structure search reveals all the energetically competitive monolayer configurations to belong to only two of the previously-identified families, characterized by a square or honeycomb hydrogen-bonding network, respectively. From an in-depth analysis we show that the well-known ice rules for bulk ice need to be revised for the monolayer, with distinct new rules appearing for the two networks. All identified stable phases for both are found to be non-polar (but with a topologically non-trivial texture for the square) and, hence, non-ferroelectric, in contrast to the predictions of empirical f...

Corsetti, Fabiano; Artacho, Emilio

2015-01-01T23:59:59.000Z

128

Dynamical mechanism of antifreeze proteins to prevent ice growth  

E-Print Network [OSTI]

The fascinating ability of algae, insects and fishes to survive at temperatures below normal freezing is realized by antifreeze proteins (AFPs). These are surface-active molecules and interact with the diffusive water/ice interface thus preventing complete solidification. We propose a new dynamical mechanism on how these proteins inhibit the freezing of water. We apply a Ginzburg-Landau type approach to describe the phase separation in the two-component system (ice, AFP). The free energy density involves two fields: one for the ice phase with a low AFP concentration, and one for liquid water with a high AFP concentration. The time evolution of the ice reveals microstructures resulting from phase separation in the presence of AFPs. We observed a faster clustering of pre-ice structure connected to a locking of grain size by the action of AFP, which is an essentially dynamical process. The adsorption of additional water molecules is inhibited and the further growth of ice grains stopped. The interfacial energy between ice and water is lowered allowing the AFPs to form smaller critical ice nuclei. Similar to a hysteresis in magnetic materials we observe a thermodynamic hysteresis leading to a nonlinear density dependence of the freezing point depression in agreement with the experiments.

B. Kutschan; K. Morawetz; S. Thoms

2014-06-19T23:59:59.000Z

129

Trigonal ice crystals in Earth’s atmosphere  

Science Journals Connector (OSTI)

We are all familiar with the hexagonal shape of snow and ice crystals, and it is well established that their six-fold symmetry is derived from the arrangement of water molecules in a hexagonal crystal structure. However, atmospheric ice crystals with only ...

Benjamin J. Murray; Christoph G. Salzmann; Andrew J. Heymsfield; Steven Dobbie; Ryan R. Neely--III; Christopher J. Cox

130

IceCube Project Monthly Report -April 2010 Accomplishments  

E-Print Network [OSTI]

1 IceCube Project Monthly Report - April 2010 Accomplishments · The IceCube Software Water Drill equipment (http://www.icecube.wisc.edu/disposition/index.php) and the site was circulated at Uppsala University are using Deep Core DOMs as flashers and receivers for low-intensity flasher runs

Saffman, Mark

131

Ice-induced enhancement of solar radiation beneath overcast skies near Antarctica  

E-Print Network [OSTI]

, the increase of irradiance occurred at a distance from the icu edge equal to 25X of the path length through the ice-covered area. Intensification factors were calculated for comparison with results of previous studies. When compared with the results.... Percentage increases of irradiance ranged from 7X to 79X, and the distance from the ice edge at which the ice enhancement was observed ranged from 23 m to 1729 m. The lower values in both instances were associated with minimum surface ice. On the average...

Horvath, Nicholas Charles

1981-01-01T23:59:59.000Z

132

The connection between Labrador Sea buoyancy loss, deep western boundary current strength, and Gulf Stream path in an ocean circulation model  

E-Print Network [OSTI]

in the diagnostic sea ice model, and insulation of the ocean, which is less physical with the prognostic sea ice and surface water mass transformation are strongly dependent on the choice of sea ice and salinity restoring boundary condi- tions. Coupling the ocean model to a prognostic sea ice model results in much greater

Jochum, Markus

133

Ice in Clouds Experiment—Layer Clouds. Part I: Ice Growth Rates Derived from Lenticular Wave Cloud Penetrations  

Science Journals Connector (OSTI)

Lenticular wave clouds are used as a natural laboratory to estimate the linear and mass growth rates of ice particles at temperatures from ?20° to ?32°C and to characterize the apparent rate of ice nucleation at water saturation at a nearly ...

Andrew J. Heymsfield; Paul R. Field; Matt Bailey; Dave Rogers; Jeffrey Stith; Cynthia Twohy; Zhien Wang; Samuel Haimov

2011-11-01T23:59:59.000Z

134

Mobile Ice Nucleus Spectrometer  

SciTech Connect (OSTI)

This first year report presents results from a computational fluid dynamics (CFD) study to assess the flow and temperature profiles within the mobile ice nucleus spectrometer.

Kulkarni, Gourihar R.; Kok, G. L.

2012-05-07T23:59:59.000Z

135

Antarctic Ice Sheet: Preliminary Results of First Core Hole to Bedrock  

Science Journals Connector (OSTI)

...unconsolidated sediment, such as glacial till, rather than solid rock. Glacial till underlies the Greenland ice sheet at Camp Century (4). Liquid water was encountered at the ice-rock interface, clear evidence that the bottom of the ice sheet is...

Anthony J. Gow; Herbert T. Ueda; Donald E. Garfield

1968-09-06T23:59:59.000Z

136

A Finite Element Model for Ice Ball Evolution in a Multi-probe Cryosurgery  

E-Print Network [OSTI]

to intracellular ice injury for fast cooling rates, and solution effects injury for slow cooling rates. BasicallyA Finite Element Model for Ice Ball Evolution in a Multi-probe Cryosurgery RICHARD WANa, *, ZHIHONG October 2002; In final form 8 May 2003) The ice formation in a water body is examined for the computation

Wan, Richard G.

137

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

E-Print Network [OSTI]

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

138

Path Integral Junctions  

E-Print Network [OSTI]

We propose path integral description for quantum mechanical systems on compact graphs consisting of N segments of the same length. Provided the bulk Hamiltonian is segment-independent, scale-invariant boundary conditions given by self-adjoint extension of a Hamiltonian operator turn out to be in one-to-one correspondence with N \\times N matrix-valued weight factors on the path integral side. We show that these weight factors are given by N-dimensional unitary representations of the infinite dihedral group.

Satoshi Ohya

2012-01-24T23:59:59.000Z

139

Path Integral Junctions  

E-Print Network [OSTI]

We propose path integral description for quantum mechanical systems on compact graphs consisting of N segments of the same length. Provided the bulk Hamiltonian is segment-independent, scale-invariant boundary conditions given by self-adjoint extension of Hamiltonian operator turn out to be in one-to-one correspondence with N \\times N matrix-valued weight factors in the path integral side. We show that these weight factors are given by N-dimensional unitary representations of the infinite dihedral group.

Ohya, Satoshi

2012-01-01T23:59:59.000Z

140

ARM - Lesson Plans: When Floating Ice Melts in the Sea  

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

Questions Does the water overflow when ice melts? Do you think that melting icebergs will make the sea level rise? Do you have any reason to support your answer in question (2)...

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


141

Rapid Cooling Using Ice Slurries for Industrial and Medical Applicatio...  

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

to replace chilled-water cooling systems in building complexes. Because of the high energy content of ice slurry, its cooling capacity is many times greater than that of...

142

Fluid Migration During Ice/Rock Planetesimal Differentiation  

E-Print Network [OSTI]

/water reaction, which will depend on the rate at which water can be segregated from a melting ice/rock core. For the liquid water phase to migrate toward the surface, the denser rock phase must compact. The primary question that this thesis will answer is how...

Raney, Robert 1987-

2012-12-12T23:59:59.000Z

143

DIFFRACTION STUDIES OF ICE Alexe BOSAK  

E-Print Network [OSTI]

Ic 28o halo observed at least 7 times since 1629 octahedral particles of ice Ic! #12;Cooling downDIFFRACTION STUDIES OF ICE Alexeï BOSAK European Synchrotron Radiation Facility #12;Ice as the mild threat ice Ih the only ice in the crust #12;Ice as the absolute weapon Ice IX : melting point 45.8°C

Titov, Anatoly

144

The Viscosity of Ice  

Science Journals Connector (OSTI)

11 September 1908 research-article The Viscosity of Ice R. M. Deeley The Royal Society is collaborating with JSTOR to digitize, preserve, and extend access to Proceedings of...

1908-01-01T23:59:59.000Z

145

ICE Raids: Compounding Production, Contradiction, and Capitalism  

E-Print Network [OSTI]

America: Factories and ICE Raids Produce Citizens Americansubjects. ICE raids (re)produce workers’ contradictoryfactories and ICE raids have come to produce immigrant

Reas, Elizabeth I

2009-01-01T23:59:59.000Z

146

The Wonders of Water for Families CMU Childrens School  

E-Print Network [OSTI]

or from the teapot, ice in the freezer or icicles on the roof, etc.). · Reinforce water concepts while

147

ARTICLE IN PRESS Southern Ocean sea ice and radiocarbon ages of  

E-Print Network [OSTI]

ARTICLE IN PRESS Southern Ocean sea ice and radiocarbon ages of glacial bottom waters A. Schmittner of glacial ocean circulation and radiocarbon distribution I show that increased sea ice cover over-day and one glacial, tuned to have similar rates of North Atlantic Deep Water formation are used. Insulation

Schmittner, Andreas

148

Effect of dynamic bending of level ice on ship's continuous-mode icebreaking  

Science Journals Connector (OSTI)

Abstract This paper focuses on the influences of the dynamic effects of ship–ice–water interaction on ship performance, ship motions, and ice resistance. The effects of the dynamic bending of ice wedges and ship speeds are especially investigated. The study is carried out using a numerical procedure simulating ship operations in level ice with ship motions in six degrees of freedom (DOFs). A case study is conducted with the Swedish icebreaker Tor Viking II. The 3-D hull geometry of the ship is modeled based on the lines drawing. The predicted performance of the ship is compared with data from full-scale ice trials.

Xiang Tan; Kaj Riska; Torgeir Moan

2014-01-01T23:59:59.000Z

149

A New Approach for Exploring Ice Sheets and Sub-Ice Geology  

E-Print Network [OSTI]

-velocity gradient in the surface layer. The boreholes are drilled by different techniques, requiring considerable in controlling ice dynam- ics and is largely determined by the pres- ence of water and/or sediments underneath Geological Drilling (ANDRILL)). Nev- ertheless, the available literature demon- strates that seismic studies

Kristoffersen, Yngve

150

Metastable hydronium ions in UV-irradiated ice  

SciTech Connect (OSTI)

We show that the irradiation of UV light (10-11 eV) onto an ice film produces metastable hydronium (H{sub 3}O{sup +}) ions in the ice at low temperatures (53-140 K). Evidence of the presence of metastable hydronium ions was obtained by experiments involving adsorption of methylamine onto UV-irradiated ice films and hydrogen-deuterium (H/D) isotopic exchange reaction. The methylamine adsorption experiments showed that photogenerated H{sub 3}O{sup +} species transferred a proton to the methylamine arriving at the ice surface, thus producing the methyl ammonium ion, which was detected by low energy sputtering method. The H{sub 3}O{sup +} species induced the H/D exchange of water, which was monitored through the detection of water isotopomers on the surface by using the Cs{sup +} reactive ion scattering method. Thermal and temporal stabilities of H{sub 3}O{sup +} and its proton migration activity were examined. The lifetime of the hydronium ions in the amorphized ice was greater than 1 h at {approx}53 K and decreased to {approx}5 min at 140 K. Interestingly, a small portion of hydronium ions survived for an extraordinarily long time in the ice, even at 140 K. The average migration distance of protons released from H{sub 3}O{sup +} in the ice was estimated to be about two water molecules at {approx}54 K and about six molecules at 100 K. These results indicate that UV-generated hydronium ions can be efficiently stabilized in low-temperature ice. Such metastable hydronium ions may play a significant role in the acid-base chemistry of ice particles in interstellar clouds.

Moon, Eui-Seong; Kang, Heon [Department of Chemistry, Seoul National University, 1 Gwanak-ro, Seoul 151-747 (Korea, Republic of)

2012-11-28T23:59:59.000Z

151

7-46E The COP and the refrigeration rate of an ice machine are given. The power consumption is to be determined.  

E-Print Network [OSTI]

25°F Analysis The cooling load of this ice machine is #12; #12; Btu/h4732Btu/lbm169lbm/h28LL qm7-15 7-46E The COP and the refrigeration rate of an ice machine are given. The power consumption is to be determined. Assumptions The ice machine operates steadily. Ice Machine Outdoors R COP = 2.4 QL water 55°F ice

Bahrami, Majid

152

In Shock Compression of Condensed Matter-2003, Ed. M. Furnish, Portland, OR, 2003. A NEW H2O ICE HUGONIOT  

E-Print Network [OSTI]

. Collisions on icy planetary bodies produce impact melt water, redistribute ground ice, and deposit thermalIn Shock Compression of Condensed Matter-2003, Ed. M. Furnish, Portland, OR, 2003. 1 A NEW H2O ICE the onset of phase transformations on the ice Hugoniot, and consequently, the criteria for shock melting

Stewart, Sarah T.

153

(Intrusion Path Analysis)  

SciTech Connect (OSTI)

The design and implementation of an Intrusion Path Analysis (IPA) function came about as a result of the upgrades to the security systems at the Savannah River Site (SRS), near Aiken, South Carolina. The stated requirements for IPA were broad, leaving opportunity for creative freedom during design and development. The essential elements were that it: be based on alarm and sensor state data; consider insider as well as outsider threats; be flexible and easily enabled or disabled; not be processor intensive; and provide information to the operator in the event the analysis reveals possible path openings. The final design resulted from many and varied conceptual inputs, and will be implemented in selected test areas at SRS. It fulfils the requirements and: allows selective inclusion of sensors in the analysis; permits the formation of concentric rings of protection around assets; permits the defining of the number of rings which must be breached before issuing an alert; evaluates current sensor states as well as a recent, configurable history of sensor states; considers the sensors' physical location, with respect to the concentric rings; and enables changes for maintenance without software recompilation. 3 figs.

Hardwick, R D

1989-01-01T23:59:59.000Z

154

Polynyas, Leads in the Southern Ocean -Encyclopedia of the Antarctic The sea ice surrounding Antarctica and covering much of the Southern Ocean is far from  

E-Print Network [OSTI]

Polynyas, Leads in the Southern Ocean - Encyclopedia of the Antarctic The sea ice surrounding with patches of open water and cracks. Larger, persistent areas of open water within the sea ice pack are called polynyas (a word of Russian origin); while linear cracks in the sea ice are called leads

Renfrew, Ian

155

Ice cream headache  

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

Ice cream headache Ice cream headache Name: fath Status: N/A Age: N/A Location: N/A Country: N/A Date: Around 1993 Question: What causes an "ice cream headache"? Are they dangerous? What would happen if I induced an ice cream headache when I had a regular headache? Replies: This is really a neat question. I am certainly no expert on headaches, but it has a lot to do blood circulation in the sinuses and around and within the brain. Why do some people get them easily and other seem resistant? The cold might restrict blood flow which is the basis for the problem. An Ice cream headache can be turned "on" or "off" by adjusting the rate of consumption, Slurpees work best, so really cold stuff enhances the effect. Are there stages: cold sensation, lingering headache, subsiding headache, warming, etc? Does the cold actually create similar headache "conditions" or does the brain confused cause it cannot directly feel pain? The difference in people is probably due to differences in arteriole branching and general circulation. In my experience smokers get worse headaches than nonsmokers of the same age. Do you find a similar trend? I am trying to stimulate discussion!

156

Designing for effective stationkeeping in ice  

E-Print Network [OSTI]

and intervention vessels for Arctic oil and gas. #12;2. An effective Ice Management system · Ice Management for the CIVArctic vessel. - Comparison with the ice model tests carried out in the Aker Arctic ice tank in May 2011

Nørvåg, Kjetil

157

Surface science investigations of photoprocesses in model interstellar ices  

SciTech Connect (OSTI)

The kinetic energy of benzene and water molecules photodesorbed from astrophysically relevant ices on a sapphire substrate under irradiation by a UV laser tuned to the S{sub 1}(leftarrow)S{sub 0} {pi}{yields}{pi}* transition of benzene has been measured using time-of-flight mass spectrometry. Three distinct photodesorption mechanisms have been identified--a direct adsorbate-mediated desorption of benzene, an indirect adsorbate-mediated desorption of water, and a substrate-mediated desorption of both benzene and water. The translational temperature of each desorbing population was well in excess of the ambient temperature of the ice matrix.

Thrower, J. D.; Collings, M. P.; McCoustra, M. R. S.; Burke, D. J.; Brown, W. A.; Dawes, A.; Holtom, P. D.; Kendall, P.; Mason, N. J.; Jamme, F.; Fraser, H. J.; Clark, I. P.; Parker, A. W. [School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom); Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ (United Kingdom); Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes MK7 6AA (United Kingdom); SOLEIL Synchrotron, BP 48, L'Orme des Merisiers, F-91192 Gif sur Yvette Cedex (France); Department of Physics, Scottish Universities Physics Alliance (SUPA), University of Strathclyde, John Anderson Building, 107 Rottenrow East, Glasgow G4 0NG (United Kingdom); Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX (United Kingdom)

2008-07-15T23:59:59.000Z

158

Collabortive Authoring of Walden's Paths  

SciTech Connect (OSTI)

Collaborative Authoring of Walden's Paths. Theory and Practice of Digital Libraries. Lecture Notes in Computer Sciences 2012.Lecture Notes in Computer Sciences 2012

Yuanling, Dr. Li [Texas A& M University; Bogen, Paul Logasa [ORNL; Pogue, Daniel [Halliburton Energy Services; Furuta, Dr. Richard Keith [Texas A& M University; ShipmanIII, Dr. Frank Major [Texas A& M University

2012-01-01T23:59:59.000Z

159

A New Path Forward  

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

4, Fourth Quarter, 2011 4, Fourth Quarter, 2011 www.fossil.energy.gov/news/energytoday.html HigHligHts inside 2 A New Path Forward A Column from the Office of Fossil Energy's Chief Operating Officer 4 A Legacy of Benefit A Look at How the Office of Fossil Energy Has Returned National Benefit 5 Increasing Production and Storage New Study Explains How CO2 Injection in Oilfield Can Increase Production 6 A Medical Improvement NETL Helps Develop Improved Coronary Stents for Heart Patients 9 International Efforts CSLF Ministerial Reinforces Support for CCUS Construction activities began at an Illinois ethanol plant that will demon- strate carbon capture and storage. The project, sponsored by the Office of Fossil Energy, is the first large-scale

160

Thermoalgebras and path integral  

SciTech Connect (OSTI)

Using a representation for Lie groups closely associated with thermal problems, we derive the algebraic rules of the real-time formalism for thermal quantum field theories, the so-called thermo-field dynamics (TFD), including the tilde conjugation rules for interacting fields. These thermo-group representations provide a unified view of different approaches for finite-temperature quantum fields in terms of a symmetry group. On these grounds, a path integral formalism is constructed, using Bogoliubov transformations, for bosons, fermions and non-abelian gauge fields. The generalization of the results for quantum fields in (S{sup 1}){sup d}xR{sup D-d} topology is addressed.

Khanna, F.C. [Theoretical Physics Institute, University of Alberta, Edmonton, AB T6G 2J1 (Canada); TRIUMF, Vancouver, BC, V6T 2A3 (Canada)], E-mail: khanna@phys.ualberta.ca; Malbouisson, A.P.C. [Centro Brasileiro de Pesquisas Fisicas/MCT, 22290-180 Rio de Janeiro, RJ (Brazil)], E-mail: adolfo@cbpf.br; Malbouisson, J.M.C. [Instituto de Fisicas, Universidade Federal da Bahia, 40210-340 Salvador, BA (Brazil)], E-mail: jmalboui@ufba.br; Santana, A.E. [Instituto de Fisicas, Universidade de Brasilia, 70910-900 Brasilia, DF (Brazil)], E-mail: asantana@fis.unb.br

2009-09-15T23:59:59.000Z

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


161

IceCube Project Monthly Report -December 2008 Accomplishments  

E-Print Network [OSTI]

IceCube Project Monthly Report - December 2008 Accomplishments · Drilling and string installation of December 2008 and a total of 16 strings were deployed by January 15th . The deep core prototype string are filled with water, and the controlled freeze of the water in the tanks is underway. · Additional

Saffman, Mark

162

Impact of Solvent on Photocatalytic Mechanisms: Reactions of Photodesorption Products with Ice Overlayers on the TiO2(110) Surface  

SciTech Connect (OSTI)

The effects of water and methanol ice overlayers on the photodecomposition of acetone on rutile TiO2(110) were evaluated in ultrahigh vacuum (UHV) using photon stimulated desorption (PSD) and temperature programmed desorption (TPD). In the absence of ice overlayers, acetone photodecomposed on TiO2(110) at 95 K by ejection of a methyl radical into the gas phase and formation of acetate on the surface. With ice overlayers, the methyl radicals are trapped at the interface between TiO2(110) and the ice. When water ice was present, these trapped methyl radicals reacted either with each other to form ethane or with other molecules in the ice (e.g., water or displaced acetone) to form methane (CH4), ethane (CH3CH3) and other products (e.g., methanol), with all of these products trapped in the ice. The new products were free to revisit the surface or depart during desorption of the ice. When methanol ice was present, methane formation came about only from reaction of trapped methyl radicals with the methanol ice. Methane and ethane slowly leaked through methanol ice overlayers into vacuum at 95 K, but not through water ice overlayers. Different degrees of site competition between water and acetone, and between methanol and acetone led to different hydrogen abstraction pathways in the two ices. These results provide new insights into product formation routes and solution-phase radical formation mechanisms that are important in heterogeneous photocatalysis.

Shen, Mingmin; Henderson, Michael A.

2011-04-07T23:59:59.000Z

163

Molecules, ices and astronomy  

Science Journals Connector (OSTI)

......research-article Features Molecules, ices and astronomy David A Williams, Wendy A Brown, Stephen...brown@ucl.ac.uk Dept of Physics and Astronomy, University College London, Gower Street...of Chemistry, UCL Dept of Physics and Astronomy, UCL Over the past 40 years, about......

D A Williams; W A Brown; S D Price; J M C Rawlings; S Viti

2007-02-01T23:59:59.000Z

164

ice | proceedings Forensic Engineering  

E-Print Network [OSTI]

ice | proceedings Forensic Engineering Volume 165 Issue FE4 November 2012 Forensic Engineering or economic damage. Research and practice papers are sought on traditional or modern forensic engineering, design and construction. Topics covered also include research and education best practice in forensic

Mottram, Toby

165

SOME PROPERTIES OF PATH MEASURES CHRISTIAN LEONARD  

E-Print Network [OSTI]

SOME PROPERTIES OF PATH MEASURES CHRISTIAN L´EONARD Abstract. We call any measure on a path space, a path measure. Some notions about path measures which appear naturally when solving the Schr of an unbounded path measure 3 2. Relative entropy with respect to an unbounded measure 7 3. Positive integration

Paris-Sud XI, Université de

166

Structural Testing: An Introduction Flow Graphs Path Testing Conclusions Path Testing  

E-Print Network [OSTI]

Structural Testing: An Introduction Flow Graphs Path Testing Conclusions Path Testing Mohammad Mousavi Eindhoven University of Technology, The Netherlands Software Testing, 2013 Mousavi: Path Testing #12;Structural Testing: An Introduction Flow Graphs Path Testing Conclusions Outline Structural

Mousavi, Mohammad

167

Structural Testing: An Introduction Flow Graphs Path Testing Conclusions Path Testing  

E-Print Network [OSTI]

Structural Testing: An Introduction Flow Graphs Path Testing Conclusions Path Testing Mohammad Mousavi Eindhoven University of Technology, The Netherlands Software Testing, 2012 Mousavi: Path Testing #12;Structural Testing: An Introduction Flow Graphs Path Testing Conclusions Outline Structural

Mousavi, Mohammad

168

Federal Energy Management Program: FEMP Designated Product: Water-Cooled  

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

FEMP Designated FEMP Designated Product: Water-Cooled Ice Machines to someone by E-mail Share Federal Energy Management Program: FEMP Designated Product: Water-Cooled Ice Machines on Facebook Tweet about Federal Energy Management Program: FEMP Designated Product: Water-Cooled Ice Machines on Twitter Bookmark Federal Energy Management Program: FEMP Designated Product: Water-Cooled Ice Machines on Google Bookmark Federal Energy Management Program: FEMP Designated Product: Water-Cooled Ice Machines on Delicious Rank Federal Energy Management Program: FEMP Designated Product: Water-Cooled Ice Machines on Digg Find More places to share Federal Energy Management Program: FEMP Designated Product: Water-Cooled Ice Machines on AddThis.com... Energy-Efficient Products Federal Requirements

169

The effect of selective desorption mechanisms during interstellar ice formation  

E-Print Network [OSTI]

Major components of ices on interstellar grains in molecular clouds - water and carbon oxides - occur at various optical depths. This implies that selective desorption mechanisms are at work. An astrochemical model of a contracting low-mass molecular cloud core is presented. Ice was treated as consisting of the surface and three subsurface layers (sublayers). Photodesorption, reactive desorption, and indirect reactive desorption were investigated. The latter manifests itself through desorption from H+H reaction on grains. Desorption of shallow subsurface species was included. Modeling results suggest the existence of a "photon-dominated ice" during the early phases of core contraction. Subsurface ice is chemically processed by interstellar photons, which produces complex organic molecules. Desorption from the subsurface layer results in high COM gas-phase abundances at Av = 2.4...10mag. This may contribute towards an explanation for COM observations in dark cores. It was found that photodesorption mostly gove...

Kalvans, Juris

2015-01-01T23:59:59.000Z

170

No Confinement Needed: Observation of a Metastable Hydrophobic Wetting Two-Layer Ice on Graphene  

SciTech Connect (OSTI)

The structure of water at interfaces is crucial for processes ranging from photocatalysis to protein folding. Here, we investigate the structure and lattice dynamics of two-layer crystalline ice films grown on a hydrophobic substrate - graphene on Pt(111) - with low energy electron diffraction, reflection-absorption infrared spectroscopy, rare-gas adsorption/desorption, and ab-initio molecular dynamics. Unlike hexagonal ice, which consists of stacks of puckered hexagonal "bilayers", this new ice polymorph consists of two flat hexagonal sheets of water molecules in which the hexagons in each sheet are stacked directly on top of each other. Such two-layer ices have been predicted for water confined between hydrophobic slits, but not previously observed. Our results show that the two-layer ice forms even at zero pressure at a single hydrophobic interface by maximizing the number of hydrogen bonds at the expense of adopting a non-tetrahedral geometry with weakened bonds.

Kimmel, Gregory A.; Matthiesen, Jesper; Baer, Marcel; Mundy, Christopher J.; Petrik, Nikolay G.; Smith, R. Scott; Dohnalek, Zdenek; Kay, Bruce D.

2009-09-09T23:59:59.000Z

171

Image Content Engine (ICE)  

SciTech Connect (OSTI)

The Image Content Engine (ICE) is being developed to provide cueing assistance to human image analysts faced with increasingly large and intractable amounts of image data. The ICE architecture includes user configurable feature extraction pipelines which produce intermediate feature vector and match surface files which can then be accessed by interactive relational queries. Application of the feature extraction algorithms to large collections of images may be extremely time consuming and is launched as a batch job on a Linux cluster. The query interface accesses only the intermediate files and returns candidate hits nearly instantaneously. Queries may be posed for individual objects or collections. The query interface prompts the user for feedback, and applies relevance feedback algorithms to revise the feature vector weighting and focus on relevant search results. Examples of feature extraction and both model-based and search-by-example queries are presented.

Brase, J M

2007-03-26T23:59:59.000Z

172

E-Print Network 3.0 - adjacent shelf waters Sample Search Results  

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

the cavity beneath an ice... ); freezing occurs because warm waters in contact with the ice-shelf base undergo cooling and freshening... of the fluxes of heat and fresh water...

173

PATH-RELINKING INTENSIFICATION METHODS FOR ...  

E-Print Network [OSTI]

Apr 1, 2010 ... Back-and-forward path-relinking does at least as well as either backward or ..... Fundamentals of scatter search and path relinking. Control and ...

user

174

Hydrogen Education Curriculum Path at Michigan Technological...  

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

Curriculum Path at Michigan Technological University Hydrogen Education Curriculum Path at Michigan Technological University 2009 DOE Hydrogen Program and Vehicle Technologies...

175

Collaborative Authoring of Walden's Paths  

E-Print Network [OSTI]

The World Wide Web contains rich collections of digital materials that can be used in education and learning settings. The collaborative authoring prototype of Walden's Paths targets two groups of users: educators and learners. From the perspective...

Li, Yuanling

2012-10-19T23:59:59.000Z

176

Methanesulfonate in the Greenland Ice Sheet Project 2 Ice Core  

E-Print Network [OSTI]

sulfate in the Dye 3 and Camp Century Greenland ice cores infor SO4 2- in the Dye 3, Camp Century, MSA to non-sea salt

Saltzman, E. S; Whung, P.-Y.; Mayewski, P. A

1997-01-01T23:59:59.000Z

177

An icing physics study by using lifetime-based molecular tagging thermometry technique  

E-Print Network [OSTI]

- ing the wind turbine to shut off (Dalili et al., 2009). Icing can also affect the tower structures of water droplets Solidification process Micro scale heat transfer Wind turbine icing a b s t r a c- ming, Minnesota, and Iowa, where wind turbines are subjected to the problems caused by cold climate

Hu, Hui

178

The Path a Proton Takes Through a Fuel Cell Membrane  

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

Path a Proton Path a Proton Takes Through a Fuel Cell Membrane The Path a Proton Takes Through a Fuel Cell Membrane October 11, 2012 | Tags: Basic Energy Sciences (BES), Chemistry, Franklin, Hopper Linda Vu, lvu@lbl.gov, +1 510 495 2402 Ram.jpg The cover represents the environment around the side chain. The right side is the water network that exists between the sulfonate groups shown in yellow. The left side is the short chain with the sulfonate group. Many experts believe that fuel cells may someday serve as revolutionary clean energy conversion devices for transportation and other portable power applications. Because they generate electricity by converting chemical hydrogen and oxygen into water, fuel cells generate energy much more efficiently than combustion devices, and with near-zero pollutant

179

Fire and Ice Issue 9  

E-Print Network [OSTI]

£s FIRE AND ICE # 9 IB FIRE ICE #9 A Blake/Avon slash fanzine r Available from: Kathleen Resch POBox 1766 Temple City, CA 91780 Kathleener@aol.com FIRE AND ICE # 9copyright © May, 2005 by Kathleen Resch for the contributors. No reprints... or reproduction without the written permission ofthe author/artist This is an amateur publication and is not p intended to infringe upon the rights ofany holders of"Blake's 7" copyrights. FIRE AND ICE 9 TABLE OF CONTENTS LEAVING ROOM 101 by Nova 2 TOO MANY...

Multiple Contributors

2005-01-01T23:59:59.000Z

180

Theoretical approach of freeze seawater desalination on flake ice maker utilizing LNG cold energy  

Science Journals Connector (OSTI)

Abstract In this work, a novel concept in freeze desalination (FD) was introduced. Nowadays the total liquefied natural gas (LNG) production capacity has reached 290 Mt/year. Its enormous cold energy released from re-gasification can be used in the freeze desalination process to minimize the overall energy consumption. A process of FD on flake ice maker utilizing LNG cold energy was designed and simulated by HYSYS software. An ice bucket on flake ice maker was chosen as seawater crystallizer mainly due to its continuous ice making and removing ice without heat source. A dynamic model of the freezing section has been developed and simulated through gPROMS software. The results show that the consumption of 1 kg equivalent LNG cold energy can obtain about 2 kg of ice melt water. In addition, it is shown that the power consumption of this LNG/FD hybrid process is negligible.

Wensheng Cao; Clive Beggs; Iqbal M. Mujtaba

2015-01-01T23:59:59.000Z

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


181

Materialization TradeOffs in Hierarchical Shortest Path Algorithms  

E-Print Network [OSTI]

Materialization Trade­Offs in Hierarchical Shortest Path Algorithms Shashi Shekhar, Andrew Fetterer] form the kernel of many important applica­ tions including transportation; water, electric, and gas utilities; telephone networks; urban management; sewer maintenance, and irrigation canal man­ agement

Shekhar, Shashi

182

ARM - Lesson Plans: When Land Ice Melts  

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

ice melts? Do you think melting glaciers and other land-based ice masses will make sea level rise? Will it submerge the continents on which the ice used to be? Most of the...

183

Regional groundwater flow paths in Trans-Pecos, Texas inferred from oxygen,  

E-Print Network [OSTI]

and hydrogen, oxygen, and strontium isotopes. dD and d18 O values fall close to the global meteoric water lineRegional groundwater flow paths in Trans-Pecos, Texas inferred from oxygen, hydrogen, and strontium isotopes, and major ion chemistry are used to con- strain flow paths in a fracture-controlled regional

Banner, Jay L.

184

Testing Oil Saturation Distribution in Migration Paths Using MRI1 Jianzhao Yan 1  

E-Print Network [OSTI]

- 1 - Testing Oil Saturation Distribution in Migration Paths Using MRI1 Jianzhao Yan 1 , Xiaorong media, and to measure oil and water saturation. Although this technique has great advantages compared14. Using15 MRI, the oil secondary migration paths are scanned to measure the saturation distribution during

Paris-Sud XI, Université de

185

Drilling deep in South Pole Ice  

E-Print Network [OSTI]

To detect the tiny flux of ultra-high energy neutrinos from active galactic nuclei or from interactions of highest energy cosmic rays with the microwave background photons needs target masses of the order of several hundred cubic kilometers. Clear Antarctic ice has been discussed as a favorable material for hybrid detection of optical, radio and acoustic signals from ultra-high energy neutrino interactions. To apply these technologies at the adequate scale hundreds of holes have to be drilled in the ice down to depths of about 2500 m to deploy the corresponding sensors. To do this on a reasonable time scale is impossible with presently available tools. Remote drilling and deployment schemes have to be developed to make such a detector design reality. After a short discussion of the status of modern hot water drilling we present here a design of an autonomous melting probe, tested 50 years ago to reach a depth of about 1000 m in Greenland ice. A scenario how to build such a probe today with modern technologies...

Karg, Timo

2014-01-01T23:59:59.000Z

186

Therapeutic Hypothermia: Protective Cooling Using Medical Ice...  

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

Therapeutic Hypothermia: Protective Cooling Using Medical Ice Slurry Technology available for licensing: Proprietary method and equipment for making an ice slurry coolant to induce...

187

State estimation of the Labrador Sea with a coupled sea ice-ocean adjoint model  

E-Print Network [OSTI]

Sea ice (SI) and ocean variability in marginal polar and subpolar seas are closely coupled. SI variability in the Labrador Sea is of climatic interest because of its relationship to deep convection/mode water formation, ...

Fenty, Ian Gouverneur

2010-01-01T23:59:59.000Z

188

Coupled Sea Ice–Ocean-State Estimation in the Labrador Sea and Baffin Bay  

E-Print Network [OSTI]

Sea ice variability in the Labrador Sea is of climatic interest because of its relationship to deep convection, mode-water formation, and the North Atlantic atmospheric circulation. Historically, quantifying the relationship ...

Fenty, Ian

189

Evaluation of steam path audits  

SciTech Connect (OSTI)

Tri-State Generation and Transmission association is the operating agent for the 1350 megawatt Craig Generating Station, located in northwestern Colorado. Tri-State has recently incorporated turbine steam path audits into their aggressive performance improvement program. The intent of the audits are to quantify and attain the most cost effective increase in turbine performance as a result of a major outage. Valuable information about performance losses in the turbine has been obtained from steam path audits conducted on the three Craig Units. However, accurate audit results often depend on the quality of measurements and the experience of the auditor. Without a second method to verify the results of a steam path audit, repairs might be performed on a non-cost effective basis, or significant performance degradations might be overlooked. In addition, an inaccurate audit may lead to erroneous expectations for performance improvements resulting from the maintenance performed during the outage.

Caudill, M.B. [Tri-State Generation and Transmission Association, Inc., Montrose, CO (United States); Griebenow, R.D. [SAIC, Huntersville, NC (United States)

1995-06-01T23:59:59.000Z

190

ARM - Measurement - Cloud ice particle  

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

ice particle ice particle ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Cloud ice particle Particles made of ice found in clouds. Categories Cloud Properties Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments MET : Surface Meteorological Instrumentation Field Campaign Instruments REPLICATOR : Balloon-borne Ice Crystal Replicator CPI : Cloud Particle Imager CVI-AIR : Counterflow Virtual Impactor LEARJET : Lear Jet PARTIMG : Particle imager UAV-PROTEUS-MICRO : Proteus Cloud Microphysics Instruments

191

Hydrological and water quality characteristics of three rock glaciers: Blanca Massif, Colorado, USA  

E-Print Network [OSTI]

interstitially or as discrete lenses. The geometry of a rock glacier is conducive not only to the formation and growth of ice, but also to the entrapment of water in the fluid state. It is the ice and the trapped water that are important in providing a source... sediments, and ice. The ice occurs in rock glaciers either interstitially or as discrete lenses. The geometry of a rock glacier is conducive not only to the formation and growth of ice, but also to the entrapment of water in the fluid state. It is the ice...

DeMorett, Joseph Lawrence

2012-06-07T23:59:59.000Z

192

Ice deformation near SHEBA R. W. Lindsay  

E-Print Network [OSTI]

in the vicinity of the Surface Heat Budget of the Arctic Ocean (SHEBA) ice camp that is suitable for forcing factor for regional heat fluxes, ice growth and melt rates, and ice strength [Maykut, 1982Ice deformation near SHEBA R. W. Lindsay Polar Science Center, University of Washington, Seattle

Lindsay, Ron

193

Comment on ``A quantitative framework for interpretation of basal ice facies formed by ice  

E-Print Network [OSTI]

heave would be expected to produce were revealed beneath the Kamb Ice Stream by the pioneering boreholeComment on ``A quantitative framework for interpretation of basal ice facies formed by ice quantitative framework for interpretation of basal ice facies formed by ice accretion over subglacial sediment

Worster, M. Grae

194

Ice coring on Vestfonna Ice Cap Contact person: John Moore (jmoore@ulapland.fi).  

E-Print Network [OSTI]

reach bedrock about 4 tons of ice will need to be flown out to Longyearbyen in insulated boxesIce coring on Vestfonna Ice Cap Contact person: John Moore (jmoore@ulapland.fi). Participants, Polish Academy of Science glowacki@igf.edu.pl Science: Ice cores from the glaciers outside the main ice

Moore, John

195

ORIGINAL PAPER A bacterial ice-binding protein from the Vostok ice core  

E-Print Network [OSTI]

to produce a 54 kDa ice-binding protein (GenBank EU694412) that is similar to ice-binding proteins previously- vival at sub-zero temperatures by producing proteins that bind to and inhibit the growth of ice crystalsORIGINAL PAPER A bacterial ice-binding protein from the Vostok ice core James A. Raymond Ã? Brent C

Christner, Brent C.

196

IceCube Collaboration Governance Document IceCube Collaboration Governance Document  

E-Print Network [OSTI]

IceCube Collaboration Governance Document IceCube Collaboration Governance Document Revision 8.1, November 21, 2014 Page 1 of 20 #12;IceCube Collaboration Governance Document IceCube Collaboration Governance Document Revision 8.1, November 21, 2014 Collaboration Objectives The IceCube Collaboration (the

Saffman, Mark

197

JF: Tropospheric Path Delay Correction Phase Correction Experiments at Chajnantor and Mauna Kea  

E-Print Network [OSTI]

in atmospheric water vapour, presents a major challenge for the next generation of millimeter and submillimeter of atmospheric phase fluctuations. Instrumentation To test the water line radiometry technique, we have built two. Thus, these water line radiometers view the same path through the atmosphere as the interferometer

Groppi, Christopher

198

JF: Tropospheric Path Delay Correction Phase Correction Experiments at Chajnantor and Mauna Kea  

E-Print Network [OSTI]

by fluctuations in atmospheric water vapour, presents a major challenge for the next generation of millimeter correction of atmospheric phase fluctuations. Instrumentation To test the water line radiometry technique, we Kea, Hawaii. Thus, these water line radiometers view the same path through the atmosphere

Groppi, Christopher

199

Climatic Ice Core Records from the Tropical Quelccaya Ice Cap  

Science Journals Connector (OSTI)

...DANSGAARD, W, LATE CENOZOIC GLACIA 37 ( 1971 ). DANSGAARD, W, ONE THOUSAND CENTURIES OF CLIMATIC RECORD FROM CAMP CENTURY ON GREENLAND ICE SHEET, SCIENCE 166 : 377 ( 1969 ). DANSGAARD, W, STABLE ISOTOPES IN PRECIPITATION, TELLUS 16...

LONNIE G. THOMPSON; STEFAN HASTENRATH; BENJAMÍN MORALES ARNAO

1979-03-23T23:59:59.000Z

200

Fire and Ice Issue 2  

E-Print Network [OSTI]

. fipl cpn r FLASHPOINT A flame that can't be seen, cloaked in black and silver and disdain, born of anger and of love no longer dared. An ice-encrusted soul, dormant in the aftermath of accusations piled like snow against the heated passions of a man who...^ $$% i&l /P^ \\0 rffej FIRE AND ICE AVAILABLE FROM Kathleen Resch PO Box 1766 Temple City, CA 91780 FIRE AND ICE II TABLE OF CONTENTS COVER by Phoenix FRONTISPIECE by Gayle Feyrer "Flashpoint" by Rachel Duncan 1 PEDESTAL by Thomas 2 "A Damn Fine...

Multiple Contributors

1993-01-01T23:59:59.000Z

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


201

Fire and Ice Issue 7  

E-Print Network [OSTI]

       ' FIRE and ICE # 7 -p! jP) FIRE AND ICE VII Available from: Kathleen Resch PO Box 1766 Temple City, CA 91780 Kathleener@aol.com © May 2002by Kathleen Reschfor the contributors. No reprints or reproduction without the written... permission of the author/artist. Thisis an amateur publication and is not in tended to infringe upon the rights ofTerryNation, BBC-TV or any others. i - J FIRE AND ICE VI Table of Contents HALF A LOAF by Linda Norman 1 GROUNDHOG LAY by Predatrlx 5 PLAYTIME...

Multiple Contributors

2002-01-01T23:59:59.000Z

202

Ice mechanics and risks to offshore structures  

SciTech Connect (OSTI)

This volume brings together the results of all salient research development in ice engineering, from smaller scale to full size tests on ice strength and ice mechanics which is essential criteria for the design of safe, cost effective structures. Much of the data has been released from confidential industry files and thus allows, for the first time, a full appraisal of the subject. Contents include - Types and Distribution of Ice, Mechanical Properties, Measurements of Ice-Structure Interaction, and Analysis of Ice Failure and Design Ice Loads. This work is completed with a full literary review and subject index.

Sanderson, T.J.O.

1988-01-01T23:59:59.000Z

203

Decadal to seasonal variability of Arctic sea ice albedo  

E-Print Network [OSTI]

A controlling factor in the seasonal and climatological evolution of the sea ice cover is its albedo $\\alpha$. Here we analyze Arctic data from the Advanced Very High Resolution Radiometer (AVHRR) Polar Pathfinder and assess the seasonality and variability of broadband albedo from a 23 year daily record. We produce a histogram of daily albedo over ice covered regions in which the principal albedo transitions are seen; high albedo in late winter and spring, the onset of snow melt and melt pond formation in the summer, and fall freeze up. The bimodal late summer distribution demonstrates the combination of the poleward progression of the onset of melt with the coexistence of perennial bare ice with melt ponds and open water, which then merge to a broad peak at $\\alpha \\gtrsim $ 0.5. We find the interannual variability to be dominated by the low end of the $\\alpha$ distribution, highlighting the controlling influence of the ice thickness distribution and large-scale ice edge dynamics. The statistics obtained pro...

Agarwal, S; Wettlaufer, J S

2011-01-01T23:59:59.000Z

204

THE PATH OF CARBON IN PHOTOSYNTHESIS  

E-Print Network [OSTI]

The Path ot Carbon in Photosynthesis. Science" l2J. , 476 (48 THE PATH OF CARBON IN PHOTOSYNTHESIS Melvin Calvin Nobel8-A Fig. 1. Elementary photosynthesis scheme. DES IOU OF THE

Calvin, Melvin Nobel Prize lecture

2008-01-01T23:59:59.000Z

205

THE PATH OF CARBON IN PHOTOSYNTHESIS  

E-Print Network [OSTI]

The Path of Carbon in Photosynthesis, Prentice-Hall, Ino. ,to StUdy the Products of Photosynthesis as Depending on the48 THE PATH OF CARBON IN PHOTOSYNTHESIS J. A. Bassham and

Bassham, J.A.; Calvin, Melvin

2008-01-01T23:59:59.000Z

206

An experimental and theoretical study of the ice accretion process during artificial and natural icing conditions  

E-Print Network [OSTI]

Real-time measurements of ice growth during artificial and natural icing conditions were conducted using an ultrasonic pulse-echo technique. This technique allows ice thickness to be measured with an accuracy of ?0.5 mm; ...

Kirby, Mark Samuel

1986-01-01T23:59:59.000Z

207

Weak detonations, their paths and  

Science Journals Connector (OSTI)

Previously, a quasi-steady form of the classical Rankine-Hugoniot weak detonation has been shown to play an integral part in describing certain forms of detonation initiation, arising during an intermediate stage between the thermal ignition of the material and the first appearance of a strong detonation with Zeldovich-von Neumann-Döring (ZND) structure. In this paper, we use a parametric variable integration to calculate numerically the path of the weak detonation in two important initiation scenarios, shock-induced and initial disturbance-induced transition to detonation, via a large activation energy induction domain model. The influence that the nature of the path may have on the weak detonation structure is also discussed. In each case these calculations enable us to predict how, where and when the transition to a strong detonation with ZND structure will occur. Explanations for several phenomena observed in both experiments and numerical studies on transition to detonation are also uncovered by these calculations.

Mark Short; J W Dold

2002-01-01T23:59:59.000Z

208

Photosynthesis—path to food  

Science Journals Connector (OSTI)

Photosynthesis—path to food ... The idea of producing more and better agricultural products by tinkering with the extremely complex mechanisms which control photosynthesis is today little more than a dream. ... However, much research remains to be done to bring the dream to reality, he said at the Symposium on Photosynthesis, held to highlight the dedication of International Minerals & Chemical's -S6.5 million Growth Science Center in Libertyville, 111. ...

1966-10-17T23:59:59.000Z

209

The shallow shelf approximation as a "sliding law" in a thermomechanically coupled ice sheet model  

E-Print Network [OSTI]

The shallow shelf approximation is a better ``sliding law'' for ice sheet modeling than those sliding laws in which basal velocity is a function of driving stress. The shallow shelf approximation as formulated by \\emph{Schoof} [2006a] is well-suited to this use. Our new thermomechanically coupled sliding scheme is based on a plasticity assumption about the strength of the saturated till underlying the ice sheet in which the till yield stress is given by a Mohr-Coulomb formula using a modeled pore water pressure. Using this scheme, our prognostic whole ice sheet model has convincing ice streams. Driving stress is balanced in part by membrane stresses, the model is computable at high spatial resolution in parallel, it is stable with respect to parameter changes, and it produces surface velocities seen in actual ice streams.

Bueler, Ed

2008-01-01T23:59:59.000Z

210

Accelerating cleanup: Paths to closure  

SciTech Connect (OSTI)

This document was previously referred to as the Draft 2006 Plan. As part of the DOE`s national strategy, the Richland Operations Office`s Paths to Closure summarizes an integrated path forward for environmental cleanup at the Hanford Site. The Hanford Site underwent a concerted effort between 1994 and 1996 to accelerate the cleanup of the Site. These efforts are reflected in the current Site Baseline. This document describes the current Site Baseline and suggests strategies for further improvements in scope, schedule and cost. The Environmental Management program decided to change the name of the draft strategy and the document describing it in response to a series of stakeholder concerns, including the practicality of achieving widespread cleanup by 2006. Also, EM was concerned that calling the document a plan could be misconstrued to be a proposal by DOE or a decision-making document. The change in name, however, does not diminish the 2006 vision. To that end, Paths to Closure retains a focus on 2006, which serves as a point in time around which objectives and goals are established.

Edwards, C.

1998-06-30T23:59:59.000Z

211

Path Integral on Star Graph  

E-Print Network [OSTI]

In this paper we study path integral for a single spinless particle on a star graph with N edges, whose vertex is known to be described by U(N) family of boundary conditions. After carefully studying the free particle case, both at the critical and off-critical levels, we propose a new path integral formulation that correctly captures all the scale-invariant subfamily of boundary conditions realized at fixed points of boundary renormalization group flow. Our proposal is based on the folding trick, which maps a scalar-valued wave function on star graph to an N-component vector-valued wave function on half-line. All the parameters of scale-invariant subfamily of boundary conditions are encoded into the momentum independent weight factors, which appear to be associated with the two distinct path classes on half-line that form the cyclic group Z_2. We show that, when bulk interactions are edge-independent, these weight factors are generally given by an N-dimensional unitary representation of Z_2. Generalization to momentum dependent weight factors and applications to worldline formalism are briefly discussed.

Satoshi Ohya

2011-04-28T23:59:59.000Z

212

Path Integral on Star Graph  

E-Print Network [OSTI]

In this paper we study path integral for a single spinless particle on a star graph with N edges, whose vertex is known to be described by U(N) family of boundary conditions. After carefully studying the free particle case, both at the critical and off-critical levels, we propose new path integral formulation that correctly captures all the scale-invariant subfamily of boundary conditions realized at fixed points of boundary renormalization group flow. Our proposal is based on the folding trick, which maps a scalar-valued wave function on star graph to an N-component vector-valued wave function on half-line. All the parameters of scale-invariant subfamily of boundary conditions are encoded into the momentum independent weight factors, which appear to be associated with the two distinct path classes on half-line that form the cyclic group Z_2. We show that, when bulk interactions are edge-independent, these weight factors are generally given by an N-dimensional unitary representation of Z_2. Generalization to ...

Ohya, Satoshi

2011-01-01T23:59:59.000Z

213

Path to Self-Sustainability | Department of Energy  

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

Path to Self-Sustainability Path to Self-Sustainability Chapter 7: Path to Self-Sustainability More Documents & Publications Clean Energy Finance Guide for Residential and...

214

Path to High Efficiency Gasoline Engine | Department of Energy  

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

Path to High Efficiency Gasoline Engine Path to High Efficiency Gasoline Engine Path to High Efficiency Gasoline Engine deer10johansson.pdf More Documents & Publications Partially...

215

Arctic sea-ice decline archived by multicentury annual-resolution record from crustose coralline algal proxy  

Science Journals Connector (OSTI)

...stratification, and deep water mass formation, among other...winter sea ice via wind-driven anomalies of sea-ice velocity, surface vertical...anomalously high due to wind-driven equatorward...are indicated on the map (Methods). Black circle...three accelerator mass spectrometry (AMS...

Jochen Halfar; Walter H. Adey; Andreas Kronz; Steffen Hetzinger; Evan Edinger; William W. Fitzhugh

2013-01-01T23:59:59.000Z

216

A preliminary evaluation of the impact of assimilating AVHRR data on sea ice concentration analyses  

Science Journals Connector (OSTI)

In this paper a method to assimilate data from a visual/infrared (VIS/IR) sensor for the purpose of estimating sea ice concentration is investigated. A novel forward model is presented which allows the reflectances and brightness temperatures from the VIS/IR sensor to be assimilated. The VIS/IR data are assimilated in combination with ice concentration retrievals from a passive microwave sensor using 3D variational data assimilation into a 5 km × 5 km grid of sea ice concentrations. Results are compared with those from an experiment which assimilates only the ice concentration retrievals. It is found that the VIS/IR data have a positive impact as ice on the sea ice state through comparison with independent data. The proportion of points correctly identified asice or open water increased in each region studied by including the AVHRR data, with the largest increase being from 0.921 to 0.935. This positive impact is due to the higher resolution of the VIS/IR data as compared with the passive microwave data, that improves the representation of open water in bays and coastal polynyas. There is however, a degradation in the accuracy of the sea ice state in some regions of the analysis from assimilating the VIS/IR data. Possible ways of improving the impact from VIS/IR data are discussed.

K. Andrea Scott; Mark Buehner; Alain Caya; Tom Carrieres

2013-01-01T23:59:59.000Z

217

Mantle viscosity and ice-age ice sheet topography  

SciTech Connect (OSTI)

Ice-age paleotopography and mantle viscosity can both be inferred from observations of Earth`s response to the most recent deglaciation event of the current ice age. This procedure requires iterative application of a theoretical model of the global process of glacial isostatic adjustment. Results demonstrate that the iterative inversion procedure converges to a paleotopography that is extremely close to that from the ICE-4G model. The accompanying mantle viscosity profile is furthermore shown to reconcile the requirements of aspherical geoid anomalies related to the mantle convection process, thus resolving a fundamental issue concerning mantle rheology. The combined model also explains postglacial sea level histories for the east cost of the United States. 28 refs., 9 figs.

Peltier, W.R. [Univ. of Toronto, Ontario (Canada)

1996-09-06T23:59:59.000Z

218

Ice Energy | Open Energy Information  

Open Energy Info (EERE)

Ice Energy Ice Energy Jump to: navigation, search Logo: Ice Energy Name Ice Energy Address 9351 Eastman Park Drive Place Windsor, Colorado Zip 80550 Sector Renewable energy Product Energy Storage Year founded 2003 Number of employees 51-200 Phone number 970-545-3630 Website http://www.ice-energy.com/ Coordinates 40.4651775°, -104.882° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.4651775,"lon":-104.882,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

219

Physical Controls on Ice Variability in the Bering Sea /  

E-Print Network [OSTI]

region. The model also produces less ice near much of thewinds (Figure 3.13c,d) produce more ice growth and more iceThe model produces variations in total ice area anomalies

Li, Linghan

2013-01-01T23:59:59.000Z

220

ICE Solar | Open Energy Information  

Open Energy Info (EERE)

ICE Solar ICE Solar Jump to: navigation, search Name ICE Solar Place Hyderabad, Andhra Pradesh, India Sector Solar Product India-based company focused on solar PV engineering, procurement and construction opportunities. Coordinates 17.6726°, 77.5971° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":17.6726,"lon":77.5971,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

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


221

Thermal Storage with Ice Harvesting Systems  

E-Print Network [OSTI]

Application of Harvesting Ice Storage Systems. Thermal storage systems are becoming widely accepted techniques for utility load management. This paper discusses the principles of ice harvesting equipment and their application to the multi...

Knebel, D. E.

1986-01-01T23:59:59.000Z

222

LABORATORY INDENTATION TESTS SIMULATING ICE-STRUCTURE INTERACTIONS USING CONE-SHAPED ICE  

E-Print Network [OSTI]

sample protruding from a steel retaining ring (Figure 1). The closing speed and penetration rate test scenario were ice sample type, ice temperature, interaction rate, penetration depth, cone angle cone angle, indentation rate, ice type and temperature, and indenter roughness were varied. All ice

Bruneau, Steve

223

New study details glacier ice loss following ice shelf July 25, 2011  

E-Print Network [OSTI]

and Ted #12;Scambos of the NSIDC produced detailed ice loss maps from 2001 to 2009 for the main tributaryNew study details glacier ice loss following ice shelf collapse July 25, 2011 Contact: Anthony Lane UMBC (410) 455-5793 alane@umbc.edu Katherine Leitzell National Snow and Ice Data Center University

Cambridge, University of

224

Numerical Age Computation of the Antarctic Ice Sheet for Dating Deep Ice Cores  

E-Print Network [OSTI]

Numerical Age Computation of the Antarctic Ice Sheet for Dating Deep Ice Cores Bernd M¨ugge1 for the computation of the age of ice is discussed within the frame of numerical ice sheet modelling. The first method of a numerical diffusion term to stabilize the solution and therefore produces arbitrary results in a near

Calov, Reinhard

225

Gas isotopes in ice reveal a vegetated central Greenland during ice sheet invasion  

E-Print Network [OSTI]

= ) in the silty ice, reaching values as high as 22 mM [Tison et al., 1998]. Ammonium oxalate is produced duringGas isotopes in ice reveal a vegetated central Greenland during ice sheet invasion R. Souchez,1 J prevailing during build-up of the Greenland Ice Sheet (GIS) are not yet established. Here we use results from

Chappellaz, Jérôme

226

AMSR-E Algorithm Theoretical Basis Document: Sea Ice Products  

E-Print Network [OSTI]

the Arctic perennial ice regions, and the ice temperature is produced from an algorithm similar to the Nimbus1 AMSR-E Algorithm Theoretical Basis Document: Sea Ice Products Thorsten Markus and Donald J 20771 1. Overview The AMSR-E sea ice standard level 3 products include sea ice concentration, sea ice

Waliser, Duane E.

227

Fire and Ice Issue 6  

E-Print Network [OSTI]

9#HDIQNV3>IM ".: FIRE AND ICE VI Available from: Kathleen Resch PO Box 1766 Temple City, CA 91780 © October, 2000 by Kathleen Resch for the contributors. No reprints or reproduction without the written permission of the author.../artist. This is an amateur publication and is not intended to infringe upon the rights ofTerry Nation, BBC-TV or any others. FIRE AND ICE VI 1 Table of Contents A DANGEROUS CONCEPT by Nova 1 A FRIEND IN NEED... by Julia Stamford 14 ...IS A FRIEND INDEED by Julia Stamford 19...

Multiple Contributors

2000-01-01T23:59:59.000Z

228

Fire and Ice Issue 3  

E-Print Network [OSTI]

,fpl ^1 FIRE AND ICE Available from: Kathleen Resch PO Box 1766 Temple City,CA 91780 III © May, 1995 by Kathleen Resch for the contributors. No reprints or reproduction without the written permission of the author/artist. This is an amateur... publication and is not intended to infringe upon the rightsof "Blake's 7" copyright holders.. FIRE AND ICE TABLE OF CONTENTS THE GIFT by Pat Terra 1 "innerspace" by Pat Terra 24 WILD, BEAUTIFUL AND DAMNED by Gemini 25 SET THE NIGHT ON FIRE by Riley Cannon 40...

Multiple Contributors

1995-01-01T23:59:59.000Z

229

Paleotopography of glacial-age ice sheets  

SciTech Connect (OSTI)

This is technical comment and response to the subject of paleotophography of glacial age ice sheets. The model presented by Peltier reconstructing the paleotopography of glacial age ice sheets has implications for atmospheric general circulation models of ice age climate. In addition, the model suggests that the glacial-age Antarctic Ice Sheet was significantly larger than today`s. The commentor, Edwards, suggests there is a discrepancy between data from Papua New Guinea and the model results.

Edwards, R.L. [Univ. of Minnesota, Minneapolis, MN (United States)

1995-01-27T23:59:59.000Z

230

Coherent radar ice thickness measurements over the Greenland ice sheet  

E-Print Network [OSTI]

systems are designed to use pulse compression techniques and coherent integration to obtain the high sensitivity required to measure the thickness of more than 4 km of cold ice. We used these systems to collect radar data over the interior and margins...

Gogineni, S. Prasad; Tammana, Dilip; Braaten, David A.; Leuschen, C.; Legarsky, J.; Kanagaratnam, P.; Stiles, J.; Allen, C.; Jezek, K.; Akins, T.

2001-12-27T23:59:59.000Z

231

Phylogenetic and Physiological Diversity of Microorganisms Isolated from a Deep Greenland Glacier Ice Core  

Science Journals Connector (OSTI)

...size reduction, condensation of the cytoplasm...microorganisms from the atmospheric airflow into...enhanced the recovery of the high-GC...the presence of water channels and...2003. Bacterial recovery from ancient...Reeve. 2000. Recovery and identification...glacial ice and water in Canadas High...

V. I. Miteva; P. P. Sheridan; J. E. Brenchley

2004-01-01T23:59:59.000Z

232

The generation of martian floods by the melting of ground ice above dykes  

Science Journals Connector (OSTI)

... formed by extension. The surface has also been modified by enormous floods, probably of water, which often flowed out of valleys formed by the largest of these faults. By ... can provide a heat source to melt ground ice, and so provide a source of water for the floods that have been inferred to originate in some of the large valleys ...

Dan McKenzie; Francis Nimmo

1999-01-21T23:59:59.000Z

233

Ice-Sheet Response to Oceanic Forcing  

Science Journals Connector (OSTI)

...regional-scale ice-ocean simulations suggests that the state-of-Texas...ice shelf’s rapid demise, which would...providing accurate simulation and projection of...observation and modeling indicate that increases...day (38, 39). Rapid melting of ice cliffs...with an emphasis on automated and smart-sensing...

Ian Joughin; Richard B. Alley; David M. Holland

2012-11-30T23:59:59.000Z

234

Experimental constraints on the kinetics of ice lens initiation and growth  

Science Journals Connector (OSTI)

Ice lenses are formed by the migration and solidification of unfrozen water during soil freezing, which can lead to the upwards displacement of the ground surface known as frost heave. The complicated interplay between heat and mass transport that causes ice lens formation has been addressed by several theoretical models, but uncertainties remain that require further experimental constraints. In particular, the initiation of ice lenses has long posed theoretical difficulties. We performed a series of stepwise freezing experiments in fine granular materials to observe the initiation and growth of ice lenses. Our experiments demonstrate clear and systematic relationships between the behavior of ice lenses, and the particle size and cooling temperature. Ice lenses are thicker when formed in sediments with smaller particle sizes and the initial formation position is further from the cooled boundary when it is set to lower temperatures. Our temperature measurements and photographic documentation demonstrate that ice lenses are formed below the nominal melting temperature, at a location that is sufficiently distant for the freezing velocity to have slowed below a threshold. We compared our experimental results to numerical predictions of ice lens formation that were applied to our experimental conditions. Our experimental trends are consistent with predictions of our simple, initial model. However, important quantitative differences motivate a refined treatment that emphasizes the kinetics of liquid supply from the pore space through the thin films that separate ice lenses from particle surfaces. We obtained good quantitative agreement between our experimental measurements and the refined model predictions, emphasizing the importance of kinetic effects as a control in ice lens initiation and growth.

Tomotaka Saruya; Kei Kurita; Alan W. Rempel

2013-03-18T23:59:59.000Z

235

Building Energy Software Tools Directory: Sol Path  

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

Sol Path Sol Path Sol Path logo. Graphically displays path of sun in the sky for any date and location. Good for quickly obtaining rough sun angle data, or understanding the general nature of the sun's motion. Screen Shots Keywords solar, sun, sun path Validation/Testing N/A Expertise Required None required. Users Several hundred regular users, split approximately evenly between U.S. and other countries. Audience Architects, energy analysts, home owners, educators. Input Location, date. Output Graphical display of sun path in the sky. Computer Platform Web Programming Language Macromedia Director / Shockwave Strengths Easy to use, instantaneous graphical output. Weaknesses Sometimes displays incomplete results for equatorial regions (latitude < 23 degrees). Contact Company: Sustainable By Design

236

Steam Path Audits on Industrial Steam Turbines  

E-Print Network [OSTI]

steam Path Audits on Industrial steam Turbines DOUGLAS R. MITCHELL. ENGINEER. ENCOTECH, INC., SCHENECTADY, NEW YORK ABSTRACT The electric utility industry has benefitted from steam path audits on steam turbines for several years. Benefits... not extend the turbine outage. To assure that all of the turbine audit data are available, the audit engineer must be at the turbine site the day the steam path is first exposed. A report of the opening audit findings is generated to describe the as...

Mitchell, D. R.

237

Generating functions for plateaus in Motzkin paths  

E-Print Network [OSTI]

A plateau in a Motzkin path is a sequence of three steps: an up step, a horizontal step, then a down step. We find three different forms for the bivariate generating function for plateaus in Motzkin paths, then generalize to longer plateaus. We conclude by describing a further generalization: a continued fraction form from which one can easily derive new multivariate generating functions for various kinds of path statistics. Several examples of generating functions are given using this technique.

Drake, Dan

2011-01-01T23:59:59.000Z

238

Taking the “Waste” Out of “Wastewater” for Human Water Security and Ecosystem Sustainability  

Science Journals Connector (OSTI)

...than finding infrastructure solutions to water scarcity...freshwater resources: Soft-path solutions for the 21st century . Science...Horvath A. , Energy and air emission effects of water...Waste Disposal, Fluid Water Pollution Water Purification Water Quality...

Stanley B. Grant; Jean-Daniel Saphores; David L. Feldman; Andrew J. Hamilton; Tim D. Fletcher; Perran L. M. Cook; Michael Stewardson; Brett F. Sanders; Lisa A. Levin; Richard F. Ambrose; Ana Deletic; Rebekah Brown; Sunny C. Jiang; Diego Rosso; William J. Cooper; Ivan Marusic

2012-08-10T23:59:59.000Z

239

Lab 10: Contaminated water and remediation Water on and in the Earth  

E-Print Network [OSTI]

Lab 10: Contaminated water and remediation Water on and in the Earth Where is Earth's water located that the vast majority of the fresh water available for our uses is stored in the ground (the large grey slice in ice and glaciers. Another 30 percent of freshwater is in the ground. Thus, surface-water sources (such

Li, X. Rong

240

Critical function and success path summary display  

DOE Patents [OSTI]

The content of and hierarchical access to three levels of display pages containing information on critical function monitoring and success path monitoring.

Scarola, Kenneth (Windsor, CT); Jamison, David S. (Windsor, CT); Manazir, Richard M. (North Canton, CT); Rescorl, Robert L. (Vernon, CT); Harmon, Daryl L. (Enfield, CT)

1995-01-01T23:59:59.000Z

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


241

Optimization Online - On the shortest path game  

E-Print Network [OSTI]

Jun 17, 2014 ... Abstract: In this work we address a game theoretic variant of the shortest path problem, in which two decision makers (agents/players) move ...

Andreas Darmann

2014-06-17T23:59:59.000Z

242

PathSci | Princeton Plasma Physics Lab  

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

PathSci The Princeton Plasma Physics Laboratory's Pathways to Science program is now partnering with ARISE (Advanced Research and Innovation in Science Education) and the...

243

Medical ice slurry production device  

DOE Patents [OSTI]

The present invention relates to an apparatus for producing sterile ice slurries for medical cooling applications. The apparatus is capable of producing highly loaded slurries suitable for delivery to targeted internal organs of a patient, such as the brain, heart, lungs, stomach, kidneys, pancreas, and others, through medical size diameter tubing. The ice slurry production apparatus includes a slurry production reservoir adapted to contain a volume of a saline solution. A flexible membrane crystallization surface is provided within the slurry production reservoir. The crystallization surface is chilled to a temperature below a freezing point of the saline solution within the reservoir such that ice particles form on the crystallization surface. A deflector in the form of a reciprocating member is provided for periodically distorting the crystallization surface and dislodging the ice particles which form on the crystallization surface. Using reservoir mixing the slurry is conditioned for easy pumping directly out of the production reservoir via medical tubing or delivery through other means such as squeeze bottles, squeeze bags, hypodermic syringes, manual hand delivery, and the like.

Kasza, Kenneth E. (Palos Park, IL); Oras, John (Des Plaines, IL); Son, HyunJin (Naperville, IL)

2008-06-24T23:59:59.000Z

244

Subglacial floods beneath ice sheets  

Science Journals Connector (OSTI)

...depth 100m subject to a geothermal heat flux of 50m2 gives...crude estimate). As well as the present theoretical...Atlantic or to the Gulf of Mexico. One reason for supposing...do not know this very well for a palaeo-ice sheet...and P Gogineni2001High geothermal flow, basal melt, and...

2006-01-01T23:59:59.000Z

245

Methodology for Augmenting Existing Paths with Additional Parallel Transects  

SciTech Connect (OSTI)

Visual Sample Plan (VSP) is sample planning software that is used, among other purposes, to plan transect sampling paths to detect areas that were potentially used for munition training. This module was developed for application on a large site where existing roads and trails were to be used as primary sampling paths. Gap areas between these primary paths needed to found and covered with parallel transect paths. These gap areas represent areas on the site that are more than a specified distance from a primary path. These added parallel paths needed to optionally be connected together into a single path—the shortest path possible. The paths also needed to optionally be attached to existing primary paths, again with the shortest possible path. Finally, the process must be repeatable and predictable so that the same inputs (primary paths, specified distance, and path options) will result in the same set of new paths every time. This methodology was developed to meet those specifications.

Wilson, John E.

2013-09-30T23:59:59.000Z

246

Phase-field theory of brine entrapment in sea ice: Short-time frozen microstructures  

E-Print Network [OSTI]

We analyze the early phase of brine entrapment in sea ice, using a phase field model. This model for a first-order phase transition couples non-conserved order parameter kinetics to salt diffusion. The evolution equations are derived from a Landau-Ginzburg order parameter gradient dynamics together with salinity conservation. The numerical solution of model equations by an exponential time differencing scheme describes the time evolution of phase separation between liquid water with high salinity and the ice phase with low salinity. The numerical solution in one and two dimensions indicates the formation of one dominant wavelength which sets the length scale of short-time frozen structures. A stability analysis provides the phase diagram in terms of two Landau parameters. It is distinguished an uniform ice phase, a homogeneous liquid saline water solution and a phase where solidification structures can be formed. The Landau parameters are extracted from the supercooling and superheating as well as the freezing point temperature of water. With the help of realistic parameters the distribution of brine inclusions is calculated and found in agreement with the measured samples. The size of the ice domains separating regions of concentrated seawater depends on salinity and temperature and corresponds to the size of sea ice platelets obtained from a morphological stability analysis for the solidification of salt water.

Silke Thoms; Bernd Kutschan; Klaus Morawetz

2014-05-01T23:59:59.000Z

247

Path-Quality Monitoring inPath-Quality Monitoring in the Presence of Adversaries  

E-Print Network [OSTI]

Performance Routing Protocols U f db k b t th f t h b t th Routers need tools to detect unacceptably highPath-Quality Monitoring inPath-Quality Monitoring in the Presence of Adversaries Sharon Goldberg SIGMETRICS'08 Annapolis, June 3, 2008 , , , #12;Path-quality Monitoring and the Adversary Does packet loss

Goldberg, Sharon

248

2.1 What Does Life Water on Earth  

E-Print Network [OSTI]

1 2.1 What Does Life Require? Water Water on Earth Can exist in all 3 physical states Liquid Solid Gas Not all animals must drink liquid water. Can get water from food. Can get water through metabolism of glucose. Water on Earth Source % of Supply Oceans 97.08 Ice Sheets and Glaciers 1.99 Ground

Cochran-Stafira, D. Liane

249

The Path Exchange Method for Hybrid LCA  

Science Journals Connector (OSTI)

The Path Exchange Method for Hybrid LCA ... A new Hybrid LCA method based on Structural Path Analysis is developed, which is less labor- and data-intensive than previous approaches. ... Hybrid techniques for Life-Cycle Assessment (LCA) provide a way of combining the accuracy of process analysis and the completeness of input?output analysis. ...

Manfred Lenzen; Robert Crawford

2009-09-24T23:59:59.000Z

250

Visualization of Ant Pheromone Based Path Following  

E-Print Network [OSTI]

This thesis develops a simulation and visualization of a path finding algorithm based on ant pheromone paths created in 3D space. The simulation is useful as a demonstration of a heuristic approach to NP-complete problems and as an educational tool...

Sutherland, Benjamin T.

2010-07-14T23:59:59.000Z

251

The Path of Carbon in Photosynthesis VI.  

DOE R&D Accomplishments [OSTI]

This paper is a compilation of the essential results of our experimental work in the determination of the path of carbon in photosynthesis. There are discussions of the dark fixation of photosynthesis and methods of separation and identification including paper chromatography and radioautography. The definition of the path of carbon in photosynthesis by the distribution of radioactivity within the compounds is described.

Calvin, M.

1949-06-30T23:59:59.000Z

252

ON LANDSCAPE FUNCTIONS ASSOCIATED WITH TRANSPORT PATHS  

E-Print Network [OSTI]

ON LANDSCAPE FUNCTIONS ASSOCIATED WITH TRANSPORT PATHS QINGLAN XIA Abstract. In this paper, we by Santambrogio in [10]. More precisely, we study landscape functions associated with a transport path be- tween for nonpositive p. We show an equivalence relation be- tween landscape functions associated with an -transport

Xia, Qinglan

253

Pseudo-isothermal ice-crystallization kinetics in the gas-diffusion layer  

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

Pseudo-isothermal ice-crystallization kinetics in the gas-diffusion layer Pseudo-isothermal ice-crystallization kinetics in the gas-diffusion layer of a fuel cell from differential scanning calorimetry Title Pseudo-isothermal ice-crystallization kinetics in the gas-diffusion layer of a fuel cell from differential scanning calorimetry Publication Type Journal Article Year of Publication 2013 Authors Dursch, Thomas J., Monica A. Ciontea, Gregory J. Trigub, Clayton J. Radke, and Adam Z. Weber Journal International Journal of Heat and Mass Transfer Volume 60 Pagination 450 - 458 Date Published 5/2013 ISSN 00179310 Keywords crystallization, differential scanning calorimetry, gas-diffusion layer, Heat Transfer, kinetics, melt, nonisothermal crystallization, nucleation, polyesters, polymer crystallization, solidification Abstract Non-isothermal ice-crystallization kinetics in the fibrous gas-diffusion layer (GDL) of a proton-exchange-membrane fuel cell is investigated using differential scanning calorimetry (DSC). Non-isothermal ice-crystallization rates and ice-crystallization temperatures are obtained from heat-flow measurements in a water-saturated commercial GDL at cooling rates of 2.5, 5, 10, and 25 K/min. Our previously developed isothermal ice-crystallization rate expression is extended to non-isothermal crystallization to predict ice-crystallization kinetics in a GDL at various cooling rates. Agreement between DSC experimental results and theory is good. Both show that as the cooling rate increases, ice-crystallization rates increase and crystallization temperatures decrease monotonically. Importantly, we find that the cooling rate during crystallization has a negligible effect on the crystallization rate when crystallization times are much faster than the time to decrease the sample temperature by the subcooling. Based on this finding, we propose a pseudo-isothermal method for obtaining non-isothermal crystallization kinetics using isothermal crystallization kinetics evaluated at the non-isothermal crystallization temperature.

254

Photon- and electron-stimulated desorption from laboratory models of interstellar ice grains  

SciTech Connect (OSTI)

The nonthermal desorption of water from ice films induced by photon and low energy electron irradiation has been studied under conditions mimicking those found in dense interstellar clouds. Water desorption following photon irradiation at 250 nm relies on the presence of an absorbing species within the H{sub 2}O ice, in this case benzene. Desorption cross sections are obtained and used to derive first order rate coefficients for the desorption processes. Kinetic modeling has been used to compare the efficiencies of these desorption mechanisms with others known to be in operation in dense clouds.

Thrower, J. D.; Abdulgalil, A. G. M.; Collings, M. P.; McCoustra, M. R. S.; Burke, D. J.; Brown, W. A.; Dawes, A.; Holtom, P. J.; Kendall, P.; Mason, N. J.; Jamme, F.; Fraser, H. J.; Rutten, F. J. M. [School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton, Edinburgh EH 14 4AS (United Kingdom); Department of Chemistry, University College London, 20 Gordon Street, London W1CH 0AJ (United Kingdom); Department of Physics and Astronomy, Open University, Walton Hall, Milton Keynes MK7 6AA (United Kingdom); SOLEIL Synchrotron, BP 48, L'Orme des Merisiers, F-91192 Gif surf Yvette Cedex (France); Department of Physics, Scottish Universities Physics Alliance (SUPA), University of Strathclyde, John Anderson Building, 107 Rottenrow East, Glasgow G4 0NG (United Kingdom); School of Pharmacy and iEPSAM, Keele University, Keele ST5 5BG (United Kingdom)

2010-07-15T23:59:59.000Z

255

Laboratory investigations of irradiated acetonitrile-containing ices on an interstellar dust analog  

SciTech Connect (OSTI)

Reflection-absorption infrared spectroscopy is used to study the impact of low-energy electron irradiation of acetonitrile-containing ices, under conditions close to those in the dense star-forming regions in the interstellar medium. Both the incident electron energy and the surface coverage were varied. The experiments reveal that solid acetonitrile is desorbed from its ultrathin solid films with a cross section of the order of 10{sup -17} cm{sup 2}. Evidence is presented for a significantly larger desorption cross section for acetonitrile molecules at the water-ice interface, similar to that previously observed for the benzene-water system.

Abdulgalil, Ali G. M.; Marchione, Demian; Rosu-Finsen, Alexander; Collings, Mark P.; McCoustra, Martin R. S. [School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton, Edinburgh, EH14 4AS (United Kingdom)

2012-07-15T23:59:59.000Z

256

Hydrogen ICE Vehicle Testing Activities  

SciTech Connect (OSTI)

The Advanced Vehicle Testing Activity teamed with Electric Transportation Applications and Arizona Public Service to develop and monitor the operations of the APS Alternative Fuel (Hydrogen) Pilot Plant. The Pilot Plant provides 100% hydrogen, and hydrogen and compressed natural gas (H/CNG)-blended fuels for the evaluation of hydrogen and H/CNG internal combustion engine (ICE) vehicles in controlled and fleet testing environments. Since June 2002, twenty hydrogen and H/CNG vehicles have accumulated 300,000 test miles and 5,700 fueling events. The AVTA is part of the Department of Energy’s FreedomCAR and Vehicle Technologies Program. These testing activities are managed by the Idaho National Laboratory. This paper discusses the Pilot Plant design and monitoring, and hydrogen ICE vehicle testing methods and results.

J. Francfort; D. Karner

2006-04-01T23:59:59.000Z

257

Tracer transport in the Greenland Ice Sheet: constraints on ice cores and glacial history  

Science Journals Connector (OSTI)

The climate history and dynamics of the Greenland Ice Sheet are studied using a coupled model of the depositional provenance and transport of glacier ice, allowing simultaneous prediction of the detailed isotopic stratigraphy of ice cores at all the major Greenland sites. Adopting a novel method for reconstructing the age–depth relationship, we greatly improve the accuracy of semi-Lagrangian tracer tracking schemes and can readily incorporate an age-dependent ice rheology. The larger aim of our study is to impose new constraints on the glacial history of the Greenland Ice Sheet. Leading sources of uncertainty in the climate and dynamic history are encapsulated in a small number of parameters: the temperature and elevation isotopic sensitivities, the glacial–interglacial precipitation contrast and the effective viscosity of ice in the flow law. Comparing predicted and observed ice layering at ice core sites, we establish plausible ranges for the key model parameters, identify climate and dynamic histories that are mutually consistent and recover the past depositional elevation of ice cores to ease interpretation of their climatic records. With the coupled three-dimensional model of ice dynamics and provenance transport we propose a method to place all the ice core records on a common time scale and use discrepancies to adjust the reconstructed climate history. Analysis of simulated GRIP ice layering and borehole temperature profiles confirms that the GRIP record is sensitive to the dynamic as well as to the climatic history, but not enough to strongly limit speculation on the state of the Greenland Ice Sheet during the Eemian. In contrast, our study indicates that the Dye 3 and Camp Century ice cores are extremely sensitive to ice dynamics and greatly constrain Eemian ice sheet reconstructions. We suggest that the maximum Eemian sea-level contribution of the ice sheet was in the range of 3.5–4.5 m.

Nicolas Lhomme; Garry K.C. Clarke; Shawn J. Marshall

2005-01-01T23:59:59.000Z

258

FAFCO Ice Storage test report  

SciTech Connect (OSTI)

The Ice Storage Test Facility (ISTF) is designed to test commercial ice storage systems. FAFCO provided a storage tank equipped with coils designed for use with a secondary fluid system. The FAFCO ice storage system was tested over a wide range of operating conditions. Measured system performance during charging showed the ability to freeze the tank fully, storing from 150 to 200 ton-h. However, the charging rate showed significant variations during the latter portion of the charge cycle. During discharge cycles, the storage tank outlet temperature was strongly affected by the discharge rate and tank state of charge. The discharge capacity was dependent upon both the selected discharge rate and maximum allowable tank outlet temperature. Based on these tests, storage tank selection must depend on both charge and discharge conditions. This report describes FAFCO system performance fully under both charging and discharging conditions. While the test results reported here are accurate for the prototype 1990 FAFCO Model 200, currently available FAFCO models incorporate significant design enhancements beyond the Model 200. At least one major modification was instituted as a direct result of the ISTF tests. Such design improvements were one of EPRI`s primary goals in founding the ISTF.

Stovall, T.K.

1993-11-01T23:59:59.000Z

259

Bike path Schools Bike friendly  

E-Print Network [OSTI]

cause a large percentage of car/cycle accidents. Overtaking a cyclist, and then making a right turn promotes numerous health benefits. Cycling helps reduce air, water, and noise pollution, promoting www.chibikefed.org/power.html This website will calculate how many calories and pounds of fat you burn

Crews, Stephen

260

Proton Ordering of Cubic Ice Ic: Spectroscopy and Computer Simulations  

E-Print Network [OSTI]

by producing rotational Bjerrum L-defects.1 Ambient-pressure hexagonal ice, ice Ih, shows the lowest produced from ice Ih using hydroxide doping, for example, by freezing a 0.1 M KOH solution. Because ice IhProton Ordering of Cubic Ice Ic: Spectroscopy and Computer Simulations Philipp Geiger, Christoph

Dellago, Christoph

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


261

Mach flow angularity probes for scramjet engine flow path diagnostics  

SciTech Connect (OSTI)

Mach-flow angularity (MFA) probes were developed for use in scramjet flow path probe rakes. Prototype probes were fabricated to demonstrate the assembly processes (numerical control machining, furnace brazing, and electron beam welding). Tests of prototype probes confirmed the thermal durability margins and life cycle. Selected probes were calibrated in air at Mach numbers from 1.75 to 6.0. Acceptance criteria for the production probes stressed thermal durability and pressure (and, consequently, Mach number) measurement quality. This new water-cooled MFA probe has 0.397-cm shaft diameter and is capable of withstanding heat fluxes of 2.724 kW/sq cm.

Jalbert, P.A.; Hiers, R.S. Jr. [Sverdrup Technology, Inc., Arnold AFS, TN (United States)

1993-12-31T23:59:59.000Z

262

A Numerical Investigation of Formation and Variability of Antarctic Bottom Water off Cape Darnley, East Antarctica  

Science Journals Connector (OSTI)

At several locations around Antarctica, dense water is formed as a result of intense sea ice formation. When this dense water becomes sufficiently denser than the surrounding water, it descends the continental slope and forms Antarctic Bottom ...

Yoshihiro Nakayama; Kay I. Ohshima; Yoshimasa Matsumura; Yasushi Fukamachi; Hiroyasu Hasumi

2014-11-01T23:59:59.000Z

263

Climate, Ocean and Sea Ice Modeling (COSIM)  

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

Earth, Space Sciences » Earth, Space Sciences » Climate, Ocean and Sea Ice Modeling (COSIM) Climate, Ocean and Sea Ice Modeling (COSIM) The COSIM project develops advanced ocean and ice models for evaluating the role of ocean and ice in high-latitude climate change and projecting the impacts of high-latitude change on regions throughout the globe. Get Expertise Phil Jones COSIM Email Matthew Hecht COSIM Email Elizabeth Hunke COSIM Email Mat Maltrud COSIM Email Bill Lipscomb COSIM Email Scott Elliott COSIM Email Todd Ringler COSIM Email We are also developing a set of next-generation ocean and ice models with variable resolution horizontal grids to focus resolution on regions of interest or regions where specific processes (like eddies) need to be resolved. Summary The COSIM project develops advanced ocean and ice models for evaluating the

264

Historical Antarctic mean sea ice area, sea ice trends, and winds in CMIP5 simulations  

E-Print Network [OSTI]

In contrast to Arctic sea ice, average Antarctic sea ice area is not retreating but has slowly increased since satellite measurements began in 1979. While most climate models from the Coupled Model Intercomparison Project ...

Mahlstein, Irina

265

Neglecting ice-atmosphere interactions underestimates ice sheet melt in millennial-scale deglaciation simulations  

E-Print Network [OSTI]

produce an interactive coupled integration: Atmospheric dynamics were equilibrated to an initial iceconstant ice albedos. None of these cases is able to produceproduce substantial deglaciation on a realistic timescale is attributed to the use of temporally invariant ice

Pritchard, M. S.; Bush, A. B.; Marshall, S. J.

2008-01-01T23:59:59.000Z

266

Inquiry-based learning templates for creating online educational paths  

E-Print Network [OSTI]

experience collected during a comparative study where users created Inquiry-based paths using the current Walden?s Paths? system or the template-based authoring tool. 4 2. RELATED WORK Education-oriented template-based path authoring...

Davis, Sarah Alice

2006-10-30T23:59:59.000Z

267

IceT users' guide and reference.  

SciTech Connect (OSTI)

The Image Composition Engine for Tiles (IceT) is a high-performance sort-last parallel rendering library. In addition to providing accelerated rendering for a standard display, IceT provides the unique ability to generate images for tiled displays. The overall resolution of the display may be several times larger than any viewport that may be rendered by a single machine. This document is an overview of the user interface to IceT.

Moreland, Kenneth D.

2009-06-01T23:59:59.000Z

268

IceT users' guide and reference.  

SciTech Connect (OSTI)

The Image Composition Engine for Tiles (IceT) is a high-performance sort-last parallel rendering library. In addition to providing accelerated rendering for a standard display, IceT provides the unique ability to generate images for tiled displays. The overall resolution of the display may be several times larger than any viewport that may be rendered by a single machine. This document is an overview of the user interface to IceT.

Moreland, Kenneth D.

2011-01-01T23:59:59.000Z

269

A ``triple sea-ice state'' mechanism for the abrupt warming and synchronous ice sheet collapses during Heinrich events  

E-Print Network [OSTI]

the strong sea ice albedo and insulating feedbacks. Such abrupt sea ice changes can also account was trapped at the base of the ice sheet due to the thick and insulating glacier that prevented it fromA ``triple sea-ice state'' mechanism for the abrupt warming and synchronous ice sheet collapses

Tziperman, Eli

270

Ice Formation in Gas-Diffusion Layers  

E-Print Network [OSTI]

porous media does not exist. Once the fundamentals of iceFundamental Issues in Subzero PEMFC Startup and Operation. ” UTC Fuel Cells, DOE

Dursch, Thomas

2013-01-01T23:59:59.000Z

271

City of Eagan ?Civic Ice Arena Renovation  

Broader source: Energy.gov [DOE]

Project objectives: Provide a reliable central ice making and heating system that meets the performance requirements of the owner. Reduce operation and maintenance costs.

272

The last Scandinavian Ice Sheet in northwestern Russia: ice flow patterns and decay dynamics  

E-Print Network [OSTI]

U N C O R R EC TED PR O O F The last Scandinavian Ice Sheet in northwestern Russia: ice flow Sheet in northwestern Russia: ice flow patterns and decay dynamics. Boreas, Vol. 35, pp. xxxÁxxx. Oslo) in northwestern Russia took place after a period of periglacial conditions. Till of the last SIS, Bobrovo till

Ingólfsson, �lafur

273

A Path to More Sustainable Transportation | Department of Energy  

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

A Path to More Sustainable Transportation A Path to More Sustainable Transportation 2004 Diesel Engine Emissions Reduction (DEER) Conference Presentation: U.S. Environmental...

274

Navigating Roadblocks on the Path to Advanced Biofuels Deployment...  

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

Navigating Roadblocks on the Path to Advanced Biofuels Deployment Navigating Roadblocks on the Path to Advanced Biofuels Deployment Breakout Session 2: Frontiers and Horizons...

275

The Path to Transforming Knowledge into Energy Projects: DOE...  

Energy Savers [EERE]

The Path to Transforming Knowledge into Energy Projects: DOE Tribal Renewable Energy Webinar Series 2015 The Path to Transforming Knowledge into Energy Projects: DOE Tribal...

276

Briefing: DOE EM Landfill Workshop & Path Forward | Department...  

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

Landfill Workshop & Path Forward Briefing: DOE EM Landfill Workshop & Path Forward By: Office of Groundwater and Soil Remediation Where: SSAB Teleconference 2 Subject: DOE EM...

277

Definition: Scheduling Path | Open Energy Information  

Open Energy Info (EERE)

Scheduling Path Scheduling Path Jump to: navigation, search Dictionary.png Scheduling Path The Transmission Service arrangements reserved by the Purchasing-Selling Entity for a Transaction.[1] Related Terms transmission lines, Purchasing-Selling Entity, Transmission Service, transmission line References ↑ Glossary of Terms Used in Reliability Standards An inl LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ine Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Scheduling_Path&oldid=480301" Categories: Definitions ISGAN Definitions What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation:

278

Hippocampal ``Time Cells'': Time versus Path Integration  

E-Print Network [OSTI]

Neuron Article Hippocampal ``Time Cells'': Time versus Path Integration Benjamin J. Kraus,1 function of hippocampal networks (Etienne and Jeffery, 2004; McNaughton et al., 1991, 1996, 2006; O

Hasselmo, Michael

279

EnerPath | Open Energy Information  

Open Energy Info (EERE)

EnerPath EnerPath Jump to: navigation, search Logo: EnerPath Name EnerPath Address 1758 Orange Tree Lane Place Redlands, California Zip 92374 Sector Buildings, Efficiency, Services Product Energy Efficiency Programs Number of employees 51-200 Website http://www.enerpath.com Coordinates 34.0678193°, -117.2147181° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":34.0678193,"lon":-117.2147181,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

280

Path of Carbon in Photosynthesis III  

E-Print Network [OSTI]

TIIE PAT3 OF C R O IN PHOTOSYNTHESIS A B K A. A. Benson andin the early products of photosynthesis, we Stepka, W. , inP THE PATH OF CARBON IN PHOTOSYNTHESIS. 111. BY A. A. Benson

Benson, A.A.; Calvin, M.

2008-01-01T23:59:59.000Z

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


281

A GCM Parameterization of Ice Particle Mean Effective Sizes for High Latitude Cirrus Clouds and It's Comparison with Mid-Latitude Parmaterization  

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

GCM Parameterization of Ice Particle Mean Effective GCM Parameterization of Ice Particle Mean Effective Sizes for High Latitude Cirrus Clouds and It's Comparison with Mid-Latitude Parameterization F. S. Boudala Department of Oceanography Dalhousie University Halifax, Nova Scotia, Canada Q. Fu Department of Atmospheric Sciences University of Washington Seattle, Washington G. A. Issac Meteorological Service of Canada Toronto, Ontario, Canada Introduction Single-scattering properties of ice clouds depend on both ice water content (IWC) and effective size of cloud particles (Fu 1996; Fu et al. 1998). However, only the IWC information is provided in numerical models. Stephens et al. (1990) showed that the ice cloud feedback on a CO 2 warming simulation could be either positive or negative depending on the value of the ice particle size assumed. Parameterizations

282

Phase-field theory of brine entrapment in sea ice: Short-time frozen microstructures  

E-Print Network [OSTI]

We analyze the early phase of brine entrapment in sea ice, using a phase field model. This model for a first-order phase transition couples non-conserved order parameter kinetics to salt diffusion. The evolution equations are derived from a Landau-Ginzburg order parameter gradient dynamics together with salinity conservation. The numerical solution of model equations by an exponential time differencing scheme describes the time evolution of phase separation between liquid water with high salinity and the ice phase with low salinity. The numerical solution in one and two dimensions indicates the formation of one dominant wavelength which sets the length scale of short-time frozen structures. A stability analysis provides the phase diagram in terms of two Landau parameters. It is distinguished an uniform ice phase, a homogeneous liquid saline water solution and a phase where solidification structures can be formed. The Landau parameters are extracted from the supercooling and superheating as well as the freezin...

Thoms, Silke; Morawetz, Klaus

2014-01-01T23:59:59.000Z

283

ARKTOS: An intelligent system for SAR sea ice image classification  

E-Print Network [OSTI]

We present an intelligent system for satellite sea ice image analysis named Advanced Reasoning using Knowledge for T ping Of Sea ice (ARKTOS). ARKTOS performs fully automated analysis of synthetic aperture radar (SAR) sea ice images by mimicking...

Soh, L. K.; Tsatsoulis, Costas; Gineris, D.; Bertoia, C.

2004-01-01T23:59:59.000Z

284

NASA’S PATH DEPENDS ON CONGRESS  

Science Journals Connector (OSTI)

NASA’S PATH DEPENDS ON CONGRESS ... President Barack Obama has given NASA a new human space exploration plan that replaces the agency’s current path, which has enjoyed bipartisan support in Congress. ... Since the President introduced his plan, which relies on commercial partners, in February as part of his fiscal 2011 budget proposal, Congress has been studying details of it to help provide oversight of and direction to NASA. ...

DAVID PITTMAN

2010-08-30T23:59:59.000Z

285

Water Efficiency Program Prioritization  

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

Efficiency Program Efficiency Program Prioritization Federal Energy Management Program Office of Energy Efficiency and Renewable Energy January 2009 Will Lintner (william.lintner@ee.doe.gov) Federal Energy Management The Goal - EO 13423 Beginning in 2008, Federal agencies must reduce water consumption intensity through life- effective measures, relative to the baseline of the agency's water consumption in fiscal year 2007 by 2 percent annually through the end of FY 2015 or 16 percent by the end of FY 2015. 2 Water Use Intensit ty (gal/sqft) Federal Sector Glide-Path to Meeting WUI Reduction Goal 55 50 45 40 35 30 25 20 FY 07 FY 08 FY 09 FY 10 FY 11 FY 12 FY 13 FY 14 FY 15 Total Federal sector FY07 WUI Glide-Path for meeting WUI reduction goal (16%) 3 Next Steps * Compile Water Data FY 2008. The baseline for water

286

Greenland Ice Sheet "Sliding" a Small Contributor to Future Sea...  

Office of Science (SC) Website

(ice2sea manuscript no. 121). ElmerIce simulations were performed using high-performance computing resources from Grand quipement National de Calcul Intensif - Centre...

287

Hail Ice Damage of Stringer-Stiffened Curved Composite Panels /  

E-Print Network [OSTI]

of projectile SHI. Thus, the ice produces a more large-areaproduce uneven pressure/forces being applied onto the ice

Le, Jacqueline Linh

2013-01-01T23:59:59.000Z

288

SciTech Connect: optimal initial conditions for coupling ice...  

Office of Scientific and Technical Information (OSTI)

Conference: optimal initial conditions for coupling ice sheet models to earth system models Citation Details In-Document Search Title: optimal initial conditions for coupling ice...

289

Effects of ice cover on sediment resuspension and phosphorus ...  

Science Journals Connector (OSTI)

Since ice coverage increased shear resistance, climate-driven absence or shortening of ice-cover would reduce the period for settling of particles and their ...

290

The ice-limit of Coulomb gauge Yang-Mills theory  

E-Print Network [OSTI]

In this paper we describe gauge invariant multi-quark states generalising the path integral framework developed by Parrinello, Jona-Lasinio and Zwanziger to amend the Faddeev-Popov approach. This allows us to produce states such that, in a limit which we call the ice-limit, fermions are dressed with glue exclusively from the fundamental modular region associated with Coulomb gauge. The limit can be taken analytically without difficulties, avoiding the Gribov problem. This is llustrated by an unambiguous construction of gauge invariant mesonic states for which we simulate the static quark--antiquark potential.

Heinzl, Thomas; Langfeld, Kurt; Lavelle, Martin; McMullan, David

2008-01-01T23:59:59.000Z

291

Persistent Ocean Monitoring with Underwater Gliders: Path Plans and Adapting Sampling Resolution 3D/4D  

E-Print Network [OSTI]

, penalized for navigating through waters of large magnitude ocean currents, and is length constrained. AlongPersistent Ocean Monitoring with Underwater Gliders: Path Plans and Adapting Sampling Resolution 3D Abstract Ocean processes are dynamic and complex events that occur on multiple different spatial

Frandsen, Jannette B.

292

Adaptive Path Planning for Tracking Ocean Fronts with an Autonomous Underwater Vehicle  

E-Print Network [OSTI]

Adaptive Path Planning for Tracking Ocean Fronts with an Autonomous Underwater Vehicle Ryan N an ocean front for ecological purposes. At the high level, we envision the scenario shown in Fig. 1 front with an Autonomous Under- water Vehicle (AUV) based on predictions and/or pri- ors provided

Smith, Ryan N.

293

Oxygen diffusion in titanite: Lattice diffusion and fast-path diffusion in single crystals  

E-Print Network [OSTI]

Oxygen diffusion in titanite: Lattice diffusion and fast-path diffusion in single crystals X June 2006 Editor: P. Deines Abstract Oxygen diffusion in natural and synthetic single-crystal titanite was characterized under both dry and water-present conditions. For the dry experiments, pre-polished titanite

Watson, E. Bruce

294

6, 20592090, 2006 Ice nucleation in  

E-Print Network [OSTI]

intermediate solubility and melting temperatures) nucleated ice at the same temperature as aqueous sulfuric Discussions Ice nucleation in sulfuric acid/organic aerosols: implications for cirrus cloud formation M. R. Beaver1 , M. J. Elrod2 , R. M. Garland1 , and M. A. Tolbert1 1 Department of Chemistry and Biochemistry

Boyer, Edmond

295

Ocean and Sea Ice SAF Technical Note  

E-Print Network [OSTI]

Ocean and Sea Ice SAF Technical Note SAF/OSI/CDOP/KNMI/TEC/RP/147 Validation of ASCAT 12.5-km winds The Ocean and Sea Ice Satellite Application Facility (OSI SAF) delivers an operational level 2 wind product produces a level 1 product with 12.5-km WVC spacing that has a resolution of approximately 25 km. Since

Stoffelen, Ad

296

Ocean and Sea Ice SAF Technical Note  

E-Print Network [OSTI]

Ocean and Sea Ice SAF Technical Note SAF/OSI/CDOP2/KNMI/TEC/RP/194 Quality Control of Ku. The OSCAT level 2a data are available in near-real time and OWDP is used at KNMI to produce the Ocean and Sea Ice (OSI) SAF wind product which is made available to users. A beta version of OWDP is also

Stoffelen, Ad

297

Largest Ice-Bank Promotes Load Management  

E-Print Network [OSTI]

California's largest ice-bank storage system is an example of how thermal storage can be applied to both new and existing buildings. At the Union Oil Company in Brea, California, one massive ice-storage system satisfies the air conditioning needs...

Brarmann, G. L.

1983-01-01T23:59:59.000Z

298

Stability of ice-sheet grounding lines  

Science Journals Connector (OSTI)

...81 73 Stability of ice-sheet grounding lines Richard F. Katz 1 * M. Grae Worster 2...ice sheets are sensitive to grounding-line position and variation, characteristics...models. We present a theory for grounding-line dynamics in three spatial dimensions and...

2010-01-01T23:59:59.000Z

299

An update on modeling land-ice/ocean interactions in CESM  

SciTech Connect (OSTI)

This talk is an update on ongoing land-ice/ocean coupling work within the Community Earth System Model (CESM). The coupling method is designed to allow simulation of a fully dynamic ice/ocean interface, while requiring minimal modification to the existing ocean model (the Parallel Ocean Program, POP). The method makes use of an immersed boundary method (IBM) to represent the geometry of the ice-ocean interface without requiring that the computational grid be modified in time. We show many of the remaining development challenges that need to be addressed in order to perform global, century long climate runs with fully coupled ocean and ice sheet models. These challenges include moving to a new grid where the computational pole is no longer at the true south pole and several changes to the coupler (the software tool used to communicate between model components) to allow the boundary between land and ocean to vary in time. We discuss benefits for ice/ocean coupling that would be gained from longer-term ocean model development to allow for natural salt fluxes (which conserve both water and salt mass, rather than water volume).

Asay-davis, Xylar [Los Alamos National Laboratory

2011-01-24T23:59:59.000Z

300

E-Print Network 3.0 - anti-icing Sample Search Results  

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

Used Unserviceable No de-ice, anti-ice or related 73 - - - Wing tail... De-icing boots - 10 3 0 Wing tail bleed-air anti-ice - 3 0 0 Wing tail electric anti-ice - 2 0...

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


301

Constraining ice mass loss from Jakobshavn Isbræ (Greenland) using InSAR-measured crustal uplift  

Science Journals Connector (OSTI)

......Similar to the differential atmospheric and ionospheric signals...Furuya M. , Wahr J., 2005. Water level changes at an ice-dammed...Engineering a 2D quality mesh generator and Delaunay triangulator...A., Hensley S., 1997. Atmospheric effects in interferometric......

Lin Liu; John Wahr; Ian Howat; Shfaqat Abbas Khan; Ian Joughin; Masato Furuya

2012-03-01T23:59:59.000Z

302

The microstructure of polar ice. Part I: Highlights from ice core research  

Science Journals Connector (OSTI)

Abstract Polar ice sheets play a fundamental role in Earth's climate system, by interacting actively and passively with the environment. Active interactions include the creeping flow of ice and its effects on polar geomorphology, global sea level, ocean and atmospheric circulation, and so on. Passive interactions are mainly established by the formation of climate records within the ice, in form of air bubbles, dust particles, salt microinclusions and other derivatives of airborne impurities buried by recurrent snowfalls. For a half-century scientists have been drilling deep ice cores in Antarctica and Greenland for studying such records, which can go back to around a million years. Experience shows, however, that the ice-sheet flow generally disrupts the stratigraphy of the bottom part of deep ice cores, destroying the integrity of the oldest records. For all these reasons glaciologists have been studying the microstructure of polar ice cores for decades, in order to understand the genesis and fate of ice-core climate records, as well as to learn more about the physical properties of polar ice, aiming at better climate-record interpretations and ever more precise models of ice-sheet dynamics. In this Part I we review the main difficulties and advances in deep ice core drilling in Antarctica and Greenland, together with the major contributions of deep ice coring to the research on natural ice microstructures. In particular, we discuss in detail the microstructural findings from Camp Century, Byrd, Dye 3, GRIP, GISP2, NorthGRIP, Vostok, Dome C, EDML, and Dome Fuji, besides commenting also on the earlier results of some pioneering ventures, like the Jungfraujoch Expedition and the Norwegian–British–Swedish Antarctic Expedition, among others. In the companion Part II of this work (Faria et al., 2014), the review proceeds with a survey of the state-of-the-art understanding of natural ice microstructures and some exciting prospects in this field of research.

Sérgio H. Faria; Ilka Weikusat; Nobuhiko Azuma

2014-01-01T23:59:59.000Z

303

Enhancing the resolution of sea ice in long-term global ocean general circulation model (gcm) integrations  

E-Print Network [OSTI]

Open water in sea ice, such as leads and polynyas, plays a crucial role in determining the formation of deep- and bottom-water, as well as their long-term global properties and circulation. Ocean general circulation models (GCMs) designed...

Kim, Joong Tae

2007-09-17T23:59:59.000Z

304

Critical Mechanisms for the Formation of Extreme Arctic Sea-Ice Extent in the Summers of 2007 and 1996  

SciTech Connect (OSTI)

A warming Arctic climate is undergoing significant e 21 nvironmental change, most evidenced by the reduction of Arctic sea-ice extent during the summer. In this study, we examine two extreme anomalies of September sea-ice extent in 2007 and 1996, and investigate the impacts of cloud fraction (CF), atmospheric precipitable water vapor (PWV), downwelling longwave flux (DLF), surface air temperature (SAT), pressure and winds on the sea-ice variation in 2007 and 1996 using both satellite-derived sea-ice products and MERRA reanalysis. The area of the Laptev, East Siberian and West Chukchi seas (70-90oN, 90-180oE) has experienced the largest variation in sea-ice extent from year-to-year and defined here as the Area Of Focus (AOF). The record low September sea-ice extent in 2007 was associated with positive anomalies 30 of CF, PWV, DLF, and SAT over the AOF. Persistent anti-cyclone positioned over the Beaufort Sea coupled with low pressure over Eurasia induced easterly zonal and southerly meridional winds. In contrast, negative CF, PWV, DLF and SAT anomalies, as well as opposite wind patterns to those in 2007, characterized the 1996 high September sea-ice extent. Through this study, we hypothesize the following positive feedbacks of clouds, water vapor, radiation and atmospheric variables on the sea-ice retreat during the summer 2007. The record low sea-ice extent during the summer 2007 is initially triggered by the atmospheric circulation anomaly. The southerly winds across the Chukchi and East Siberian seas transport warm, moist air from the north Pacific, which is not only enhancing sea-ice melt across the AOF, but also increasing clouds. The positive cloud feedback results in higher SAT and more sea-ice melt. Therefore, 40 more water vapor could be evaporated from open seas and higher SAT to form more clouds, which will enhance positive cloud feedback. This enhanced positive cloud feedback will then further increase SAT and accelerate the sea-ice retreat during the summer 2007.

Dong, Xiquan; Zib, Benjamin J.; Xi, Baike; Stanfield, Ryan; Deng, Yi; Zhang, Xiangdong; Lin, B.; Long, Charles N.

2014-07-29T23:59:59.000Z

305

Retrieval of Cloud Phase and Ice Crystal Habit from Satellite Data  

SciTech Connect (OSTI)

Knowledge of cloud phase (liquid or ice) and crystal habit are of fundamental importance to both remote sensing and climate simulations. Using water droplets instead of ice crystals in retrieving cloud properties from satellite data can lead to errors in the retrieval of cloud height, optical thickness, and microphysical properties. Satellite retrievals of microphysical properties are also influenced by the crystal habit used in the retrieval, either indirectly via an assumed phase function or directly via assumed profiles of ice crystal habits. Realistic treatment of ice cloud radiative and microphysical properties, which depend on crystal habit, is important in climate simulations, especially in tropical anvil regions. In this work, we present a method for retrieving cloud phase and the dominant ice crystal habit from radiances measured by the Multi-angle Imaging Spectro-Radiometer (MISR) and the Moderate Resolution Imaging Spectroradiometer (MODIS). The shape of an atmospheric particle affects the scattering of light such that water droplets and ice crystals of various habits have somewhat different phase functions. Consequently the radiances measured by the MISR instrument, which observes light scattered from the same cloud at nine different viewing angles, are functions of the crystal shape. In principle, the measured angular radiance pattern can be used to infer the crystal shape. In this work, we present initial results from a cloud phase and ice crystal habit retrieval based on combining the MISR multi-angular visible wavelength measurements with MODIS shortwave infrared measurements. The nine angular measurements provided by the MISR cameras allow a wide range of scattering angles to be viewed in a single scene, which provides sensitivity to particle habit. The presence of the MODIS instrument on the same satellite allows additional information on particle size to be incorporated into the retrievals. Results of the retrieval method are presented for several case studies over the continental United States. Cloud phase can be determined from the MISR angular measurements alone, due to the large differences in the phase functions of water droplets and ice crystals. By combining the MISR and MODIS measurements, crystal habit, effective radius, and optical depth can be inferred simultaneously for ice clouds. Comparisons with ground-based retrieval methods and semi-coincident in situ data illustrate that the retrieved crystal habits and sizes are reasonable.

McFarlane, Sally A.; Marchand, Roger T.; Ackerman, Thomas P.

2004-07-19T23:59:59.000Z

306

Sparse Geodesic Paths Mark A. Davenport and Richard G. Baraniuk  

E-Print Network [OSTI]

Sparse Geodesic Paths Mark A. Davenport and Richard G. Baraniuk Department of Electrical of the sparse geodesic path between two points, by which we mean the shortest path between the points geodesic path can be easily generated. The distance provides a natural similarity measure that can be ex

307

A survey on coverage path planning for robotics  

Science Journals Connector (OSTI)

Coverage Path Planning (CPP) is the task of determining a path that passes over all points of an area or volume of interest while avoiding obstacles. This task is integral to many robotic applications, such as vacuum cleaning robots, painter robots, ... Keywords: Coverage path planning, Motion planning, Path planning

Enric Galceran; Marc Carreras

2013-12-01T23:59:59.000Z

308

Fast top-k simple shortest paths discovery in graphs  

Science Journals Connector (OSTI)

With the wide applications of large scale graph data such as social networks, the problem of finding the top-k shortest paths attracts increasing attention. This paper focuses on the discovery of the top-k simple shortest paths (paths without ... Keywords: graphs, shortest path, top-k

Jun Gao; Huida Qiu; Xiao Jiang; Tengjiao Wang; Dongqing Yang

2010-10-01T23:59:59.000Z

309

Water on Earth Source % of Supply  

E-Print Network [OSTI]

1 Water on Earth Source % of Supply Oceans 97.08 Ice Sheets and Glaciers 1.99 Ground Water 0.62 Atmosphere 0.29 Lakes (Fresh) 0.01 Inland Seas / Salt Water Lakes 0.005 Soil Moisture 0.004 Rivers 0.001 Water · Water is the solvent, the medium and the participant in most of the chemical reactions occurring

Cochran-Stafira, D. Liane

310

Internet Path-Quality Monitoring inInternet Path-Quality Monitoring in the Presence of Adversaries  

E-Print Network [OSTI]

Site A Performance Routing B l i l d b t lti l th ( ltih d it ) Routers need tools to detectInternet Path-Quality Monitoring inInternet Path-Quality Monitoring in the Presence of Adversaries routed from Alice to Bob via a path of intermediate routers Routing protocols used to set up paths

Goldberg, Sharon

311

Simulating mixed-phase Arctic stratus clouds: sensitivity to ice initiation mechanisms  

SciTech Connect (OSTI)

The importance of Arctic mixed-phase clouds on radiation and the Arctic climate is well known. However, the development of mixed-phase cloud parameterization for use in large scale models is limited by lack of both related observations and numerical studies using multidimensional models with advanced microphysics that provide the basis for understanding the relative importance of different microphysical processes that take place in mixed-phase clouds. To improve the representation of mixed-phase cloud processes in the GISS GCM we use the GISS single-column model coupled to a bin resolved microphysics (BRM) scheme that was specially designed to simulate mixed-phase clouds and aerosol-cloud interactions. Using this model with the microphysical measurements obtained from the DOE ARM Mixed-Phase Arctic Cloud Experiment (MPACE) campaign in October 2004 at the North Slope of Alaska, we investigate the effect of ice initiation processes and Bergeron-Findeisen process (BFP) on glaciation time and longevity of single-layer stratiform mixed-phase clouds. We focus on observations taken during 9th-10th October, which indicated the presence of a single-layer mixed-phase clouds. We performed several sets of 12-h simulations to examine model sensitivity to different ice initiation mechanisms and evaluate model output (hydrometeors concentrations, contents, effective radii, precipitation fluxes, and radar reflectivity) against measurements from the MPACE Intensive Observing Period. Overall, the model qualitatively simulates ice crystal concentration and hydrometeors content, but it fails to predict quantitatively the effective radii of ice particles and their vertical profiles. In particular, the ice effective radii are overestimated by at least 50%. However, using the same definition as used for observations, the effective radii simulated and that observed were more comparable. We find that for the single-layer stratiform mixed-phase clouds simulated, process of ice phase initiation due to freezing of supercooled water in both saturated and undersaturated (w.r.t. water) environments is as important as primary ice crystal origination from water vapor. We also find that the BFP is a process mainly responsible for the rates of glaciation of simulated clouds. These glaciation rates cannot be adequately represented by a water-ice saturation adjustment scheme that only depends on temperature and liquid and solid hydrometeors contents as is widely used in bulk microphysics schemes and are better represented by processes that also account for supersaturation changes as the hydrometeors grow.

Sednev, Igor; Sednev, I.; Menon, S.; McFarquhar, G.

2008-02-18T23:59:59.000Z

312

Simulating mixed-phase Arctic stratus clouds: Sensitivity to ice initiationmechanisms  

SciTech Connect (OSTI)

The importance of Arctic mixed-phase clouds on radiation and the Arctic climate is well known. However, the development of mixed-phase cloud parameterization for use in large scale models is limited by lack of both related observations and numerical studies using multidimensional models with advanced microphysics that provide the basis for understanding the relative importance of different microphysical processes that take place in mixed-phase clouds. To improve the representation of mixed-phase cloud processes in the GISS GCM we use the GISS single-column model coupled to a bin resolved microphysics (BRM) scheme that was specially designed to simulate mixed-phase clouds and aerosol-cloud interactions. Using this model with the microphysical measurements obtained from the DOE ARM Mixed-Phase Arctic Cloud Experiment (MPACE) campaign in October 2004 at the North Slope of Alaska, we investigate the effect of ice initiation processes and Bergeron-Findeisen process (BFP) on glaciation time and longevity of single-layer stratiform mixed-phase clouds. We focus on observations taken during October 9th-10th, which indicated the presence of a single-layer mixed-phase clouds. We performed several sets of 12-hour simulations to examine model sensitivity to different ice initiation mechanisms and evaluate model output (hydrometeors concentrations, contents, effective radii, precipitation fluxes, and radar reflectivity) against measurements from the MPACE Intensive Observing Period. Overall, the model qualitatively simulates ice crystal concentration and hydrometeors content, but it fails to predict quantitatively the effective radii of ice particles and their vertical profiles. In particular, the ice effective radii are overestimated by at least 50%. However, using the same definition as used for observations, the effective radii simulated and that observed were more comparable. We find that for the single-layer stratiform mixed-phase clouds simulated, process of ice phase initiation due to freezing of supercooled water in both saturated and subsaturated (w.r.t. water) environments is as important as primary ice crystal origination from water vapor. We also find that the BFP is a process mainly responsible for the rates of glaciation of simulated clouds. These glaciation rates cannot be adequately represented by a water-ice saturation adjustment scheme that only depends on temperature and liquid and solid hydrometeors contents as is widely used in bulk microphysics schemes and are better represented by processes that also account for supersaturation changes as the hydrometeors grow.

Sednev, I.; Menon, S.; McFarquhar, G.

2009-04-10T23:59:59.000Z

313

The calculation of ionospheric ray paths  

E-Print Network [OSTI]

of the up-going and down- going rays, f = 30 , Y = 0. 40, bX = 0. 15, 9 =30 0 29 3-11 Simplified ionospheric ray path corresponding to the constructions shown in Figure 3-10, 30 , Y = 0. 40, bX = 0. 15, and 8 30 30 3-12 Normal index surface curves... surface curves, extraordinary mode, vertical plane; F = 30 , Y = 2. 40, bX = 0. 15 37 3-18 Normal index surface curves, extraordinary mode, vertical plane; 9 = 30 , Y = 2. 80, bX = 0. 15 38 4- 1 incidence to 60 Ordinary mode ray paths with angles...

Koehler, Buford Ray

2012-06-07T23:59:59.000Z

314

SNOW ON ANTARCTIC SEA ICE Robert A. Massom,1  

E-Print Network [OSTI]

SNOW ON ANTARCTIC SEA ICE Robert A. Massom,1 Hajo Eicken,2 Christian Haas,3 Martin O. Jeffries,2 on Antarctic sea ice plays a complex and highly variable role in air-sea-ice interaction pro- cesses of thicker snow and thin- ner ice in the Antarctic relative to the Arctic (e.g., the importance of flooding

Warren, Stephen

315

Photo of the Week: Cold as Ice - Using Titan to Build More Efficient Wind  

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

Cold as Ice - Using Titan to Build More Cold as Ice - Using Titan to Build More Efficient Wind Turbines Photo of the Week: Cold as Ice - Using Titan to Build More Efficient Wind Turbines January 10, 2014 - 2:53pm Addthis Wind energy is one of the world's fast-growing energy sources -- and many of the regions that could benefit from wind energy happen to be in cold climates. Since 2005, scientists at GE Global Research have been researching, developing and testing materials in freezing conditions. By developing more efficient materials for wind turbines, researchers can increase turbine efficiency and reduce potential downtime for wind turbines in cold climates. The teams use Oak Ridge National Laboratory's Titan, the world's most powerful supercomputer, to simulate hundreds of water droplets as they freeze, with each droplet containing one million molecules. By simulating and studying how water freezes on a molecular level, scientists are gaining an understanding of how ice forms, which will help them design better, more efficient materials for these colder climates. Pictured here is an illustration of a single water droplet, filled with molecules freezing in slow motion. Learn more about their research here. | Photo/visualization courtesy of M. Matheson, Oak Ridge National Laboratory.

316

Far-infrared spectrum of ice Ih: A first-principles study  

Science Journals Connector (OSTI)

The dielectric properties of ice Ih in the translational far-infrared region (0–400 cm-1) have been investigated by means of density functional theory methods. We show that interpretation of the experimental data for the absorption coefficient requires a full account of proton disorder, an ab initio description of the electronic response, and a proper treatment of the longitudinal-optical–transverse-optical (LO-TO) splitting. The orientational average for the LO-TO splitting yields a broad range of values, and the average over proton disorder gives rise to a peak at 150 cm-1 in the absorption spectrum of ice Ih. The peak is not present in ice XI, the ferroelectric state with lowest energy. Our study supports the notion that the far-IR dielectric properties of water aggregates are tightly related to local molecular order.

G. Profeta and S. Scandolo

2011-07-05T23:59:59.000Z

317

Optimization of a Sea Ice Model Using Basinwide Observations of Arctic Sea Ice Thickness, Extent, and Velocity  

E-Print Network [OSTI]

datasets. 1. Introduction Sea ice is important to the climate system because it insulates the cold polarOptimization of a Sea Ice Model Using Basinwide Observations of Arctic Sea Ice Thickness, Extent 2004, in final form 27 June 2005) ABSTRACT A stand-alone sea ice model is tuned and validated using

Feltham, Daniel

318

The Path to Magnetic Fusion Energy  

E-Print Network [OSTI]

1 The Path to Magnetic Fusion Energy: Crossing the Next Frontier Rob Goldston, Jon Menard with contributions from J. Brooks, R. Doerner, D. Gates, J. Harris, G.-Y. Fu, N. Gorelenkov, R. Kaita, S. Kaye, M. Kotschenreuther, G. Kramer, H. Kugel, R. Maingi, R. Majeski, C. Neumeyer, R. Nygren, M. Ono, D. Ruzic, S. Sabbagh

Princeton Plasma Physics Laboratory

319

employment opportunities in exciting career paths  

E-Print Network [OSTI]

in the complex and increasingly sophisticated food supply system. Food Industry Public Service Technical Sales in exciting career paths Food Science Cerificate for BSc graduates Food Science Cerificate for BSc graduates. Because food science is a multidisciplinary applied science, a food science education provides a broad

Barthelat, Francois

320

Current SPE Hydrodynamic Modeling and Path Forward  

SciTech Connect (OSTI)

Extensive work has been conducted on SPE analysis efforts: Fault effects Non-uniform weathered layer analysis MUNROU: material library incorporation, parallelization, and development of non-locking tets Development of a unique continuum-based-visco-plastic strain-rate-dependent material model With corrected SPE data path is now set for a multipronged approach to fully understand experimental series shot effects.

Knight, Earl E. [Los Alamos National Laboratory; Rougier, Esteban [Los Alamos National Laboratory

2012-08-14T23:59:59.000Z

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


321

Path Analysis Models of an Autonomous Agent  

E-Print Network [OSTI]

Path Analysis Models of an Autonomous Agent in a Complex Environment Paul R. Cohen, David M. Hart AFOSR-91-0067. #12;1 Phoenix Phoenix is a simulated environment populated by autonomous agents) the e orts of all, a reboss. Fires burn in unpredictable ways due to wind speed and direction, terrain

322

Path integral quantization of parametrised field theory  

E-Print Network [OSTI]

Free scalar field theory on a flat spacetime can be cast into a generally covariant form known as parametrised field theory in which the action is a functional of the scalar field as well as the embedding variables which describe arbitrary, in general curved, foliations of the flat spacetime. We construct the path integral quantization of parametrised field theory in order to analyse issues at the interface of quantum field theory and general covariance in a path integral context. We show that the measure in the Lorentzian path integral is non-trivial and is the analog of the Fradkin- Vilkovisky measure for quantum gravity. We construct Euclidean functional integrals in the generally covariant setting of parametrised field theory using key ideas of Schleich and show that our constructions imply the existence of non-standard `Wick rotations' of the standard free scalar field 2 point function. We develop a framework to study the problem of time through computations of scalar field 2 point functions. We illustrate our ideas through explicit computation for a time independent 1+1 dimensional foliation. Although the problem of time seems to be absent in this simple example, the general case is still open. We discuss our results in the contexts of the path integral formulation of quantum gravity and the canonical quantization of parametrised field theory.

Madhavan Varadarajan

2004-04-06T23:59:59.000Z

323

Folded-path optical analysis gas cell  

DOE Patents [OSTI]

A folded-path gas cell employs an elliptical concave mirror in confronting relationship to two substantially spherical concave mirrors. At least one of the spherical mirrors, and usually both, are formed with an added cylindrical component to increase orthogonal focii coincidence and thereby to increase the radiation energy throughput characteristic of the cell.

Carangelo, Robert M. (Glastonbury, CT); Wright, David D. (Vershire, VT)

1995-01-01T23:59:59.000Z

324

Nailing Down Ice in a Cloud Model  

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

Nailing Down Ice in a Cloud Model Nailing Down Ice in a Cloud Model For original submission and image(s), see ARM Research Highlights http://www.arm.gov/science/highlights/ Research Highlight A research team led by scientists at Pacific Northwest National Laboratory identified specific strengths and weaknesses of four different ice cloud retrieval algorithms. Their comparisons tested the ability of the algorithms to obtain cloud properties from radar and lidar observational measurements. The team noted the sometimes large variances in heating/cooling measurements compared to the observed data. Identifying specific weaknesses will help scientists improve our understanding of cloud properties in the atmosphere, which can be used for climate model development and evaluation. "Measuring the effective size and mass of ice crystals impacts our understanding

325

A New Greenland Deep Ice Core  

Science Journals Connector (OSTI)

...isotopic profile with that from camp Century and with a deep-sea foraminifera...deep-sea cores. The redated Camp Century record suggests a dramatic termination...CENTURIES OF CLIMATIC RECORD FROM CAMP CENTURY ON GREENLAND ICE SHEET, SCIENCE...

W. Dansgaard; H. B. Clausen; N. Gundestrup; C. U. Hammer; S. F. Johnsen; P. M. Kristinsdottir; N. Reeh

1982-12-24T23:59:59.000Z

326

Photoadaptation of high Arctic ice algae  

Science Journals Connector (OSTI)

... of the surface snow cover allowed considerable control over the light conditions of the epontic algae. Algal material was collected from the bottom few centimetres of ice with a SIPRE ... growth in their respective light environments.

Glenn F. Cota

1985-05-16T23:59:59.000Z

327

Quantifying fit in ice hockey skate boots.  

E-Print Network [OSTI]

??Purpose. This study quantified fit of ice hockey skate boots by measuring the pressure (MP) at the foot/ankle-to-boot interface using three skate sizes. The relationship… (more)

Gheorghiu, Cristian R.

2005-01-01T23:59:59.000Z

328

Scattering Properties of Oriented Hexagonal Ice Crystals  

E-Print Network [OSTI]

To interpret the data from spaceborn lidar measurements, one must have a basic understanding of the backscattering of oriented ice particles. The conventional raytracing method is not applicable to the scattering of light by oriented particles...

Zhang, Feng

2010-01-14T23:59:59.000Z

329

Hydrogen Material Compatibility for Hydrogen ICE | Department...  

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

Merit Review and Peer Evaluation Meeting, May 18-22, 2009 -- Washington D.C. pm04smith.pdf More Documents & Publications Hydrogen Materials Compatibility for the H-ICE...

330

Observations of the Askaryan Effect in Ice  

SciTech Connect (OSTI)

We report on the first observations of the Askaryan effect in ice: coherent impulsive radio Cherenkov radiation from the charge asymmetry in an electromagnetic (EM) shower. Such radiation has been observed in silica sand and rock salt, but this is the first direct observation from an EM shower in ice. These measurements are important since the majority of experiments to date that rely on the effect for ultra-high energy neutrino detection are being performed using ice as the target medium. As part of the complete validation process for the Antarctic Impulsive Transient Antenna (ANITA) experiment, we performed an experiment at the Stanford Linear Accelerator Center (SLAC) in June 2006 using a 7.5 metric ton ice target, yielding results fully consistent with theoretical expectations.

Gorham, P.W.

2007-01-16T23:59:59.000Z

331

Microsoft Word - IceMountainFinal.docx  

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

Mason West Virginia's Ice Mountain: Where Science Meets Magic On August 6, 1918, the thermometer hit 109 degrees in Hampshire County, West Virginia. It's easy to believe that the...

332

Life in the Solar System Assume we need energy, liquid water, and organic materials.  

E-Print Network [OSTI]

would land on the ice pack, use heat from a nuclear reactor to melt through it, and release a hydrobot;Comets ­ Reservoirs of Icy Water #12;Comets ­ Reservoirs of Icy Water #12;Herschel Space Observatory #12

Shirley, Yancy

333

Regenerator?based thermoacoustic refrigerator for ice cream storage applications  

Science Journals Connector (OSTI)

A regenerator?based chiller has been built in the ‘‘bellows bounce’’ style [J. Acoust. Soc. Am. 112 15 (2002)] to replace the vapor compression system in an ice cream sales cabinet. It utilizes a 6?in.?diam metal bellows to form a compliant cavity that contains the dynamic pressure oscillation (>50?kPa). The stiffness of the gas trapped in the bellows is resonated against the mass of the bellows?cap and the mass of a moving?magnet linear motor which is capable of high (>85%) electro?acoustic efficiency. A second resonator operated well below its natural frequency uses the gas stiffness of a 1?l volume nested within the bellows and the inertia of an ordinary loudspeaker cone to create the pressure difference across the regenerator that drives gas flow that is in?phase with pressure. The mass of the cone can be adjusted to vary the multiplication factor that is typically 5%–10% greater than the dynamic pressure within the bellows. The loudspeaker cone suffers none of the hydrodynamic losses associated with an acoustic inertance and eliminates problems with dc gas flow in the energy feedback path. The cold heat exchanger forms one surface of the pressure vessel permitting direct contact with any thermal load. [Work supported by Ben and Jerry’s Homemade.

2003-01-01T23:59:59.000Z

334

Terminal area flight path generation using parallel constraint propagation  

E-Print Network [OSTI]

A Flight Path Generator is defined as the module of an automated Air Traffic Control system which plans aircraft trajectories in the terminal area with respect to operational constraints. The flight path plans have to be ...

Sadoune, Michel

1989-01-01T23:59:59.000Z

335

The Path a Proton Takes Through a Fuel Cell Membrane  

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

Path a Proton Takes Through a Fuel Cell Membrane The Path a Proton Takes Through a Fuel Cell Membrane October 11, 2012 | Tags: Basic Energy Sciences (BES), Chemistry, Franklin,...

336

Spin-One Ising Model for Ice VII–Plastic Ice Phase Transitions  

Science Journals Connector (OSTI)

We propose a spin model compatible with ice VII–plastic ice phase transitions and critical phenomena discovered recently by computer simulations. The Blume–Capel spin-1 Ising model is extended in order to describe the entropic stabilization effect in the ...

Masakazu Matsumoto; Kazuhiro Himoto; Hideki Tanaka

2014-08-21T23:59:59.000Z

337

Nonequilibrium air clathrate hydrates in Antarctic ice: a paleopiezomdter for polar ice caps  

Science Journals Connector (OSTI)

...long as the ice thickness changes by only a few hundred meters. Examination of the deep ice cores from the Dye-3 and Camp Century sites in Greenland were made by the same microscopic thermal-needle method: at both these sites the onset of craigite...

H Craig; H Shoji; C C Langway; Jr

1993-01-01T23:59:59.000Z

338

ICED'09/Paper number (Contribution ID) 1 INTERNATIONAL CONFERENCE ON ENGINEERING DESIGN, ICED'09  

E-Print Network [OSTI]

ICED'09/Paper number (Contribution ID) 1 INTERNATIONAL CONFERENCE ON ENGINEERING DESIGN, ICED'09 24 - 27 AUGUST 2009, STANFORD UNIVERSITY, STANFORD, CA, USA CREATIVITY THEORIES AND SCIENTIFIC DISCOVERY: A STUDY OF C-K THEORY AND INFUSED DESIGN ABSTRACT Creativity is central to human activity

Shai, Offer

339

ICED'09/373 1 INTERNATIONAL CONFERENCE ON ENGINEERING DESIGN, ICED'09  

E-Print Network [OSTI]

ICED'09/373 1 INTERNATIONAL CONFERENCE ON ENGINEERING DESIGN, ICED'09 24 - 27 AUGUST 2009, STANFORD UNIVERSITY, STANFORD, CA, USA CREATIVITY THEORIES AND SCIENTIFIC DISCOVERY: A STUDY OF C-K THEORY AND INFUSED Creativity is central to human activity and is a powerful force in personal and organizational success

Reich, Yoram

340

A Comprehensive Parameterization of Heterogeneous Ice Nucleation of Dust Surrogate: Laboratory Study with Hematite Particles and Its Application to Atmospheric Models  

SciTech Connect (OSTI)

A new heterogeneous ice nucleation parameterization that covers a wide temperature range (-36 ?C to -78 ?C) is presented. Developing and testing such an ice nucleation parameterization, which is constrained through identical experimental conditions, is critical in order to accurately simulate the ice nucleation processes in cirrus clouds. The surface-scaled ice nucleation efficiencies of hematite particles, inferred by ns, were derived from AIDA (Aerosol Interaction and Dynamics in the Atmosphere) cloud chamber measurements under water subsaturated conditions that were realized by continuously changing temperature (T) and relative humidity with respect to ice (RHice) in the chamber. Our measurements showed several different pathways to nucleate ice depending on T and RHice conditions. For instance, almost independent freezing was observed at -60 ?C < T < -50 ?C, where RHice explicitly controlled ice nucleation efficiency, while both T and RHice played roles in other two T regimes: -78 ?C < T < -60 ?C and -50 ?C < T < -36 ?C. More specifically, observations at T colder than -60 ?C revealed that higher RHice was necessary to maintain constant ns, whereas T may have played a significant role in ice nucleation at T warmer than -50 ?C. We implemented new ns parameterizations into two cloud models to investigate its sensitivity and compare with the existing ice nucleation schemes towards simulating cirrus cloud properties. Our results show that the new AIDA-based parameterizations lead to an order of magnitude higher ice crystal concentrations and inhibition of homogeneous nucleation in colder temperature regions. Our cloud simulation results suggest that atmospheric dust particles that form ice nuclei at lower temperatures, below -36 ?C, can potentially have stronger influence on cloud properties such as cloud longevity and initiation when compared to previous parameterizations.

Hiranuma, Naruki; Paukert, Marco; Steinke, Isabelle; Zhang, Kai; Kulkarni, Gourihar R.; Hoose, Corinna; Schnaiter, Martin; Saathoff, Harald; Mohler, Ottmar

2014-12-10T23:59:59.000Z

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


341

On -locating–dominating sets in paths  

Science Journals Connector (OSTI)

Assume that G = ( V , E ) is a simple undirected graph, and C is a nonempty subset of V . For every v ? V , we define I r ( v ) = { u ? C ? d G ( u , v ) ? r } , where d G ( u , v ) denotes the number of edges on any shortest path between u and v . If the sets I r ( v ) for v ? C are pairwise different, and none of them is the empty set, we say that C is an r -locating–dominating set in G . It is shown that the smallest 2-locating–dominating set in a path with n vertices has cardinality ? ( n + 1 ) / 3 ? , which coincides with the lower bound proved earlier by Bertrand, Charon, Hudry and Lobstein. Moreover, we give a general upper bound which improves a result of Bertrand, Charon, Hudry and Lobstein.

Iiro Honkala

2009-01-01T23:59:59.000Z

342

A Heuristic Approach for Hamiltonian Path Problem with Molecules  

E-Print Network [OSTI]

of Hamiltonian Path Problem (HPP) for seven cities with synthetic DNA [1]. Inspired by his idea, Lipton and other

Hagiya, Masami

343

Landmark-based Geodesic Computation for Heuristically Driven Path Planning  

E-Print Network [OSTI]

Landmark-based Geodesic Computation for Heuristically Driven Path Planning Gabriel Peyr´e CMAP, UMR the geodesic path between two points on the surface, compution is needed on a large part of the surface when geodesic paths on images and 3D meshes. We use a heuris- tic to drive the front propagation procedure

Paris-Sud XI, Université de

344

Robot Path Planning in Uncertain Environments: A Language-Measure-  

E-Print Network [OSTI]

Robot Path Planning in Uncertain Environments: A Language-Measure- Theoretic Approach Devesh K. Jha the problem of goal-directed robot path planning in the presence of uncertainties that are induced by bounded, probabilistic finite state automata 1 Motivation and Introduction In general, path planning of robots (e

Ray, Asok

345

Your path to a career in Health Care Professions  

E-Print Network [OSTI]

Your path to a career in Health Care Professions #12;H ealth care professionals have successful careers in a variety of areas. They may work in health care administration, provide patient care, or sell is not the only path to a career in health care. In the following pages, you will find that there are many paths

Howat, Ian M.

346

Visual servoing for path reaching with nonholonomic robots Journal: Robotica  

E-Print Network [OSTI]

Visual servoing for path reaching with nonholonomic robots Journal: Robotica Manuscript ID: ROB these files (e.g. movies) online. VisionBasedPathReaching-Robotica.tex figure.tar.gz VisionBasedPathReaching.mp4 Proof for review onlyhal-00639659,version1-9Nov2011 Author manuscript, published in "Robotica 29

Paris-Sud XI, Université de

347

Analyis of Path Profiling Information Generated with Performance Monitoring Hardware  

E-Print Network [OSTI]

is to exploit hardware Performance Monitoring Units (PMUs) present in modern microprocessors. The Itanium-2 PMU can be correlated into full paths. As sta- tistically hot paths are most likely to occur in PMU sam techniques carry a high overhead, a PMU-based path profiler represents an ef- fective lightweight profiling

Colorado at Boulder, University of

348

1. Fill a container with ice. 2. Add clean water.  

E-Print Network [OSTI]

of thermometer at least 2 inches. 5. Wait 15 seconds. 6. If the thermometer reads between 32°F +/- 2 degrees of the thermometer at least 2 inches. 5. Wait 30 seconds. 6. If the thermometer reads between 212°F +/- 2 degreesCalibration Using Your Food Thermometer After taking your reading, remember to clean and sanitize after each use

349

Multisite Disordered Structure of Ice VII to 20 GPa  

Science Journals Connector (OSTI)

Neutron diffraction measurements on ice VII and ice VIII at pressures up to 20 GPa provide direct evidence of multisite disorder of both oxygen and deuterium atoms in D2O ice VII, and give the magnitudes of the site separations. An O-D distance and D-Ô-D angle closest to those found in ice VIII are obtained with oxygen sites displaced along ?111? directions. Such displacements imply an H-bond geometry significantly different from that found in ice VIII, and this may have implications for the centering transition to ice X.

R. J. Nelmes; J. S. Loveday; W. G. Marshall; G. Hamel; J. M. Besson; S. Klotz

1998-09-28T23:59:59.000Z

350

Viscosity of Interfacial Water  

Science Journals Connector (OSTI)

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

Yingxi Zhu and Steve Granick

2001-08-10T23:59:59.000Z

351

Enhanced oil recovery through water imbibition in fractured reservoirs using Nuclear Magnetic Resonance.  

E-Print Network [OSTI]

??Conventional waterflooding methods of oil recovery are difficult to apply when reservoirs show evidence of natural fractures, because injected water advances through paths of high… (more)

Hervas Ordonez, Rafael Alejandro

2012-01-01T23:59:59.000Z

352

Acoustic and seismic measurement of ice processes  

Science Journals Connector (OSTI)

As sea ice responds to environmental forcing it deforms leading to the storage of strain energy. When mechanical failure occurs most of this energy is dissipated through fracturing but a small portion radiates as seismic and acoustic waves. These waves provide useful signals for sensing the failure process in the ice. In a recent ice mechanics experiment conducted north of Prudhoe Bay (SIMI ’94) a large number of ice failure events were observed using geophone and hydrophone arrays. Preliminary results are presented including a large?scale tensile fracture test and naturally occurring sounds near a closing lead. For the artificial fracture the acoustic signals allow determination of cracking rate fracture advance and crack propagation velocities. The overall crack propagation speed is estimated to be of order 50 m?s?1; maximum cracking activities occur prior to peak loading. In the second data set the naturally occurring stick?slip process was observed as two ice sheets moved against each other in a closing lead. A wide range of frequencies can occur simultaneously representing different components of the sliding and slipping mechanisms.

David M. Farmer; Yunbo Xie

1995-01-01T23:59:59.000Z

353

Hydrogenation reactions in interstellar CO ice analogues  

E-Print Network [OSTI]

Hydrogenation reactions of CO in inter- and circumstellar ices are regarded as an important starting point in the formation of more complex species. Previous laboratory measurements by two groups on the hydrogenation of CO ices resulted in controversial results on the formation rate of methanol. Our aim is to resolve this controversy by an independent investigation of the reaction scheme for a range of H-atom fluxes and different ice temperatures and thicknesses. Reaction rates are determined by using a state-of-the-art ultra high vacuum experimental setup to bombard an interstellar CO ice analog with room temperature H atoms. The reaction of CO + H into H2CO and subsequently CH3OH is monitored by a Fourier transform infrared spectrometer in a reflection absorption mode. In addition, after each completed measurement a temperature programmed desorption experiment is performed to identify the produced species. Different H-atom fluxes, morphologies, and ice thicknesses are tested. The formation of both formaldeh...

Fuchs, G W; Ioppolo, S; Romanzin, C; Bisschop, S E; Andersson, S; Van Dishoeck, E F; Linnartz, H

2009-01-01T23:59:59.000Z

354

FORMATION OF GLYCINE ON ULTRAVIOLET-IRRADIATED INTERSTELLAR ICE-ANALOG FILMS AND IMPLICATIONS FOR INTERSTELLAR AMINO ACIDS  

SciTech Connect (OSTI)

We report the synthesis of glycine on interstellar ice-analog films composed of water, methylamine (MA), and carbon dioxide under irradiation of ultraviolet (UV) photons. Analysis of the UV-irradiated ice films by in situ mass spectrometric methods revealed glycine and other isomers as photochemical products. Deuterium-labeling experiments were conducted to determine the structures of the photoproducts and to examine their formation pathways. The reactions occur via photocleavages of C-H and N-H bonds in MA, followed by subsequent reactions of the nascent H atom with CO{sub 2}, leading to the formation of HOCO and then to glycine and carbamic acid. The photochemical synthesis of glycine occurs efficiently at the ice surfaces, and the competing photosynthesis and photodestruction processes can reach a steady-state kinetic balance at an extended UV exposure, maintaining a substantial population level of glycine. The observation suggests that interstellar amino acids can be created on ice grains, and that they can also be stored in the ices by maintaining a kinetic balance under interstellar UV irradiation. As such, the transport of amino acids in interstellar space may be possible without depleting the net abundance of amino acids in the ices but rather increasing the structural diversity of the molecules.

Lee, Chang-Woo; Kim, Joon-Ki; Moon, Eui-Seong; Kang, Heon [Department of Chemistry, Seoul National University, Gwanak-gu, Seoul 151-747, Republic of Korea (H.K.) (Korea, Republic of); Minh, Y. C. [Korea Astronomy and Space Science Institute, 838 Daeduk-daero, Yuseong-gu, Daejeon 305-348 (Korea, Republic of)], E-mail: surfion@snu.ac.kr

2009-05-20T23:59:59.000Z

355

A ‘first principles’ potential energy surface for liquid water from VRT spectroscopy of water clusters  

Science Journals Connector (OSTI)

...the many-body induction energy (Leforestier et al. 2005). This new potential was named VRT...ordinary water: substance. New York: Hafner. Dyke, T. R...mechanics and path integrals New York: McGraw- Hill. Frenkel...

2005-01-01T23:59:59.000Z

356

Intertemporal Computable Equilibrium System (ICES) | Open Energy  

Open Energy Info (EERE)

Intertemporal Computable Equilibrium System (ICES) Intertemporal Computable Equilibrium System (ICES) Jump to: navigation, search Tool Summary Name: Intertemporal Computable Equilibrium System (ICES) Agency/Company /Organization: Fondazione Eni Enrico Mattei Sector: Climate, Energy Complexity/Ease of Use: Moderate Website: www.feem.it/getpage.aspx?id=138&sez=Research&padre=18&sub=75&idsub=102 Related Tools Ex Ante Appraisal Carbon-Balance Tool (EX-ACT) General Equilibrium Model for Economy - Energy - Environment (GEM-E3) DNE21+ ... further results Find Another Tool FIND DEVELOPMENT IMPACTS ASSESSMENT TOOLS A recursive dynamic general equilibrium model developed with the main but not exclusive purpose of assessing the final welfare implication of climate change impacts on world economies. In addition to climate-change impact

357

Ice Towing Tank | Open Energy Information  

Open Energy Info (EERE)

Ice Towing Tank Ice Towing Tank Jump to: navigation, search Basic Specifications Facility Name Ice Towing Tank Overseeing Organization University of Iowa Hydrodynamic Testing Facility Type Tow Tank Length(m) 21.2 Beam(m) 5.0 Depth(m) 1.3 Cost(per day) Contact POC Special Physical Features Specialized for cold regions research, room temperature can be decreased to -10°F Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 0.5 Length of Effective Tow(m) 15.0 Wavemaking Capabilities Wavemaking Capabilities None Channel/Tunnel/Flume Channel/Tunnel/Flume None Wind Capabilities Wind Capabilities None Control and Data Acquisition Cameras Yes Description of Camera Types Underwater Available Sensors Acoustics, Thermal, Turbulence, Velocity Data Generation Capability

358

Searching for Cosmic Accelerators via IceCube  

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

Searching for Cosmic Accelerators via IceCube Searching for Cosmic Accelerators via IceCube Berkeley Lab Researchers Part of an International Hunt November 21, 2013 Lynn Yarris,...

359

Application of Ice Nucleation Kinetics in Orographic Clouds  

Science Journals Connector (OSTI)

Ice nucleation by silver iodide-sodium iodide aerosol particles has been characterized in the Colorado State University isothermal cloud chamber using the techniques of chemical kinetics. Two separate mechanisms of condensation-freezing ice ...

Rochelle R. Blumenstein; Robert M. Rauber; Lewis O. Grant; William G. Finnegan

1987-10-01T23:59:59.000Z

360

Evolutionary Optimization of an Ice Accretion Forecasting System  

Science Journals Connector (OSTI)

The ability to model and forecast accretion of ice on structures is very important for many industrial sectors. For example, studies conducted by the power transmission industry indicate that the majority of failures are caused by icing on ...

Pawel Pytlak; Petr Musilek; Edward Lozowski; Dan Arnold

2010-07-01T23:59:59.000Z

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


361

Cirrus cloud formation and the role of heterogeneous ice nuclei  

E-Print Network [OSTI]

Composition, size, and phase are key properties that define the ability of an aerosol particle to initiate ice in cirrus clouds. Properties of cirrus ice nuclei (IN) have not been well constrained due to a lack of systematic ...

Froyd, Karl D.

2013-01-01T23:59:59.000Z

362

Meltwater effects on flow of Greenland's ice sheet less severe...  

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

severe than feared Meltwater effects on flow of Greenland's ice sheet less severe for sea level rise than earlier feared, scientists say The team found that accelerating ice sheet...

363

Field determination of the densities of lake ice sheets  

Science Journals Connector (OSTI)

Oct 3, 1975 ... mating the mean density of the white ice component of such a sheet makes use of the buoyancy equation for floating ice in the form h' ' p'i =.

2000-01-04T23:59:59.000Z

364

Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Electric Ice Electric Ice Resurfacers Improve Air Quality in Minnesota to someone by E-mail Share Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality in Minnesota on Facebook Tweet about Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality in Minnesota on Twitter Bookmark Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality in Minnesota on Google Bookmark Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality in Minnesota on Delicious Rank Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality in Minnesota on Digg Find More places to share Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality in Minnesota on AddThis.com... Sept. 14, 2013

365

ANIMATION OF THE NORMAL ICE CYCLE OF THE LAURENTIAN GREAT LAKES OF NORTH AMERICA  

E-Print Network [OSTI]

OF ANNUAL ICE CYCLE 1. Fall Cooling 2. Ice Formation 3. Ice Thickness 4. Seasonal Maximum Ice Cover 5ANIMATION OF THE NORMAL ICE CYCLE OF THE LAURENTIAN GREAT LAKES OF NORTH AMERICA R.A. Assel and J describes an interactive menu- driven computer tutorial on the contemporary ice cover climatology

366

Maximum late Holocene extent of the western Greenland Ice Sheet during the late 20th century  

E-Print Network [OSTI]

the 20th century. This suggests a lagged ice-margin response to prior cooling, such as the Little Ice AgeMaximum late Holocene extent of the western Greenland Ice Sheet during the late 20th century Samuel Keywords: Greenland Ice Sheet Little Ice Age 10 Be exposure dating Ice-dammed lake Lake sediment core a b

Briner, Jason P.

367

Numerical simulation of ice-induced loads on ships and comparison with field measurements  

E-Print Network [OSTI]

Department of Marine Technology, NTNU May 28, 2013 #12;Motivation Local ice load Global ice load ShipNumerical simulation of ice-induced loads on ships and comparison with field measurements Biao Su's performance · Ice-hull interaction · Local ice load · Global ice load · Ship's performance #12;Outline

Nørvåg, Kjetil

368

Maneuverability of ships in ice: numerical simulation and comparison with field measurements  

E-Print Network [OSTI]

Maneuverability of ships in ice: numerical simulation and comparison with field measurements Biao Su Department of Marine Technology, NTNU May 28, 2013 #12;Motivation Local ice load Global ice load Ship's performance · Ice-hull interaction · Local ice load · Global ice load · Ship's performance #12

Nørvåg, Kjetil

369

Recent Metal Pollution in Agassiz Ice Cap  

Science Journals Connector (OSTI)

This is probably due to the close proximity and similar elevation of the two areas (Agassiz Ice Cap, Canadian Arctic and Camp Century, northwest Greenland), which are likely subjected to the same polluted air masses. ... Figure 3 shows Pb concentrations covering the past 250 years for three different Arctic areas:? Camp Century, northwest Greenland (dashed line, ref 1); Summit, central Greenland (solid line, ref 8); and Agassiz Ice Cap (star symbols, this work). ... Since Camp Century is lower than Summit (1866 vs 3228 m above sea level) and is expected to receive more pollution, the relative position of the two lines is reasonable, the dashed line being higher than the solid one. ...

V. Cheam; G. Lawson; J. Lechner; R. Desrosiers

1998-11-10T23:59:59.000Z

370

The IceCube Computing Infrastructure Model  

Science Journals Connector (OSTI)

In addition to the big LHC experiments, a number of mid-size experiments are coming online which need to define new computing models to meet the demands on processing and storage requirements of those experiments. We present the hybrid computing model of IceCube which leverages Grid models with a more flexible direct user model as an example of a possible solution. In IceCube a central data center at UW-Madison serves as a Tier-0 with a single Tier-1 at DESY Zeuthen.

M Merck; S Barnet

2012-01-01T23:59:59.000Z

371

An update on land-ice modeling in the CESM  

SciTech Connect (OSTI)

Mass loss from land ice, including the Greenland and Antarctic ice sheets as well as smaller glacier and ice caps, is making a large and growing contribution to global sea-level rise. Land ice is only beginning to be incorporated in climate models. The goal of the Land Ice Working Group (LIWG) is to develop improved land-ice models and incorporate them in CESM, in order to provide useful, physically-based sea-level predictions. LJWG efforts to date have led to the inclusion of a dynamic ice-sheet model (the Glimmer Community Ice Sheet Model, or Glimmer-CISM) in the Community Earth System Model (CESM), which was released in June 2010. CESM also includes a new surface-mass-balance scheme for ice sheets in the Community Land Model. Initial modeling efforts are focused on the Greenland ice sheet. Preliminary results are promising. In particular, the simulated surface mass balance for Greenland is in good agreement with observations and regional model results. The current model, however, has significant limitations: The land-ice coupling is one-way; we are using a serial version of Glimmer-CISM with the shallow-ice approximation; and there is no ice-ocean coupling. During the next year we plan to implement two-way coupling (including ice-ocean coupling with a dynamic Antarctic ice sheet) with a parallel , higher-order version of Glimmer-CISM. We will also add parameterizations of small glaciers and ice caps. With these model improvements, CESM will be able to simulate all the major contributors to 21st century global sea-level rise. Results of the first round of simulations should be available in time to be included in the Fifth Assessment Report (ARS) of the Intergovernmental Panel on Climate Change.

Lipscomb, William H [Los Alamos National Laboratory

2011-01-18T23:59:59.000Z

372

Water quality Water quantity  

E-Print Network [OSTI]

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

Boisvert, Jeff

373

Water quality Water quantity  

E-Print Network [OSTI]

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

Boisvert, Jeff

374

Automated generation of weld path trajectories.  

SciTech Connect (OSTI)

AUTOmated GENeration of Control Programs for Robotic Welding of Ship Structure (AUTOGEN) is software that automates the planning and compiling of control programs for robotic welding of ship structure. The software works by evaluating computer representations of the ship design and the manufacturing plan. Based on this evaluation, AUTOGEN internally identifies and appropriately characterizes each weld. Then it constructs the robot motions necessary to accomplish the welds and determines for each the correct assignment of process control values. AUTOGEN generates these robot control programs completely without manual intervention or edits except to correct wrong or missing input data. Most ship structure assemblies are unique or at best manufactured only a few times. Accordingly, the high cost inherent in all previous methods of preparing complex control programs has made robot welding of ship structures economically unattractive to the U.S. shipbuilding industry. AUTOGEN eliminates the cost of creating robot control programs. With programming costs eliminated, capitalization of robots to weld ship structures becomes economically viable. Robot welding of ship structures will result in reduced ship costs, uniform product quality, and enhanced worker safety. Sandia National Laboratories and Northrop Grumman Ship Systems worked with the National Shipbuilding Research Program to develop a means of automated path and process generation for robotic welding. This effort resulted in the AUTOGEN program, which has successfully demonstrated automated path generation and robot control. Although the current implementation of AUTOGEN is optimized for welding applications, the path and process planning capability has applicability to a number of industrial applications, including painting, riveting, and adhesive delivery.

Sizemore, John M. (Northrop Grumman Ship Systems); Hinman-Sweeney, Elaine Marie; Ames, Arlo Leroy

2003-06-01T23:59:59.000Z

375

Networks in Buildings: Which Path Forward?  

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

Networks in Buildings: Which Path Forward? Networks in Buildings: Which Path Forward? Title Networks in Buildings: Which Path Forward? Publication Type Conference Paper LBNL Report Number LBNL-2511E Year of Publication 2008 Authors Nordman, Bruce Conference Name 2008 ACEEE Summer Study on Energy Efficiency in Buildings Conference Location Pacific Grove, CA Keywords communication and standards, technologies Abstract To date, digital networks have principally been installed for connecting information technology devices, with more modest use in consumer electronics, security, and large building control systems. The next 20 years will see much greater deployment of networks in buildings of all types, and across all end uses. Most of these are likely to be introduced primarily for reasons other than energy efficiency, and add energy use for network interfaces and network products. Widespread networking could easily lead to increased energy use, and experience with IT and CE networks suggests this may be likely. Active engagement by energy efficiency professionals in the architecture and design of future networks could lead to their being a large and highly cost-effective tool for efficiency. However, network standards are complex and take many years to develop and negotiate so that lack of action on this in the near term may foreclose important opportunities for years or decades to come. Digital networks need to be common globally, providing another challenge to building systems and elements that are more commonly designed only for national or regional markets. Key future networks are lighting, climate control, and security/presence. This paper reviews some examples of past network designs and use and the lessons they hold for future building networks. It also highlights key needed areas for research, policy, and standards development.

376

The Path to Magnetic Fusion Energy  

SciTech Connect (OSTI)

When the possibility of fusion as an energy source for electricity generation was realized in the 1950s, understanding of the plasma state was primitive. The fusion goal has been paced by, and has stimulated, the development of plasma physics. Our understanding of complex, nonlinear processes in plasmas is now mature. We can routinely produce and manipulate 100 million degree plasmas with remarkable finesse, and we can identify a path to commercial fusion power. The international experiment, ITER, will create a burning (self-sustained) plasma and produce 500 MW of thermal fusion power. This talk will summarize the progress in fusion research to date, and the remaining steps to fusion power.

Prager, Stewart (PPPL) [PPPL

2011-05-04T23:59:59.000Z

377

Networks in Buildings: Which Path Forward?  

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

1E 1E Networks in Buildings: Which Path Forward? B. Nordman Environmental Energy Technologies Division August 2008 Presented at the 2008 ACEEE Summer Study on Energy Efficiency in Buildings Pacific Grove, CA, August 17-22, 2008, and published in the Proceedings DISCLAIMER This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of California, nor any of their employees, makes any warranty, express or implied, or assumes

378

Contemporary Lake Superior Ice Cover Climatology Raymond A. Assel  

E-Print Network [OSTI]

1973 to 2002) were digitized and analyzed to produce ice charts that portray spatial patterns of datesContemporary Lake Superior Ice Cover Climatology Raymond A. Assel NOAA Great Lakes Environmental Introduction A brief discussion of Lake Superior ice cover climatology (Phillips, 1978) was included

379

STATE OF CALIFORNIA ICE STORAGE AIR CONDITIONING (ISAC) UNITS  

E-Print Network [OSTI]

cooling with the compressor). Yes No #12;STATE OF CALIFORNIA ICE STORAGE AIR CONDITIONING (ISAC) UNITS CECSTATE OF CALIFORNIA ICE STORAGE AIR CONDITIONING (ISAC) UNITS CEC-CF-6R-MECH-08 (Revised 08/09) CALIFORNIA ENERGY COMMISSION INSTALLATION CERTIFICATE CF-6R-MECH-08 Ice Storage Air Conditioning (ISAC) Units

380

Climate impacts of ice nucleation A. Gettelman,1,2  

E-Print Network [OSTI]

back to space, cooling the planet. However, ice clouds, being cold, radiate much less long wave and cooling, with warming thought to be slightly larger. [3] Changes to ice cloud microphysics might alterClimate impacts of ice nucleation A. Gettelman,1,2 X. Liu,3 D. Barahona,4,5 U. Lohmann,2 and C

Gettelman, Andrew

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


381

Characteristics of Arctic Sea-Ice Thickness Variability in GCMs  

Science Journals Connector (OSTI)

Skillful Arctic sea ice forecasts may be possible for lead times of months or even years owing to the persistence of thickness anomalies. In this study sea ice thickness variability is characterized in fully coupled GCMs and sea ice–ocean-only ...

Edward Blanchard-Wrigglesworth; Cecilia M. Bitz

2014-11-01T23:59:59.000Z

382

Autosub missions beneath Polar Ice: Preparation and Experience  

E-Print Network [OSTI]

Autosub missions beneath Polar Ice: Preparation and Experience Gwyn Griffiths Southampton, May 2004 #12;Autosub Polar Campaigns J 2001 - Krill distribution and sea ice thickness studies in the northern Weddell Sea (Brierley, Fernandes and Brandon). J 2003 - Sea ice thickness, Bellingshausen Sea

Griffiths, Gwyn

383

ICE SHEET SOURCES OF SEA LEVEL RISE AND FRESHWATER DISCHARGE  

E-Print Network [OSTI]

ICE SHEET SOURCES OF SEA LEVEL RISE AND FRESHWATER DISCHARGE DURING THE LAST DEGLACIATION Anders E the sources of sea level rise and freshwater dis- charge to the global oceans associated with retreat of ice­10 m sea level rise at 19.0­19.5 ka, sourced largely from Northern Hemisphere ice sheet retreat

Carlson, Anders

384

FROM INTERSTELLAR POLYCYCLIC AROMATIC HYDROCARBONS AND ICE TO ASTROBIOLOGY  

E-Print Network [OSTI]

photolysis of these ices produces a host of new compounds, some of which show intriguing prebiotic behavior1 FROM INTERSTELLAR POLYCYCLIC AROMATIC HYDROCARBONS AND ICE TO ASTROBIOLOGY LOUIS J. ALLAMANDOLA, the concept of ices in dense molecular clouds ignored, and the notion of large, abundant, gas phase, carbon

385

The Need for SPIRIT DEMs to Quantify Antarctic Ice Sheet  

E-Print Network [OSTI]

appropriate mask ­ SPIRIT has the data and could produce the necessary DEMs #12;Conclusions · Antarctic iceThe Need for SPIRIT DEMs to Quantify Antarctic Ice Sheet Discharge Robert Bindschadler NASA & UMBC #12;Antarctic Ice Sheet Discharge · 33 largest, most active basins account for 840 Gt/a (Rignot

Berthier, Etienne

386

Computational methods for several models of ice stream flow  

E-Print Network [OSTI]

on any grid Shallow ice approximation produces oscillatory solutions Nonlinear and linear solvers haveComputational methods for several models of ice stream flow Jed Brown Laboratory of Hydrology transition at ice stream margins Bed slope is discontinuous and of order 1. Taylor expansions no longer valid

Brown, Jed

387

The Ice Rink Problem 1 Bernard M.E. Moret,  

E-Print Network [OSTI]

The Ice Rink Problem 1 Bernard M.E. Moret, Michael Collins, Jared Saia, and Ling Yu Department the sensor footprint. A similar task with a simpler geometry consists of cleaning an ice rink. We prove that the method used in ice rinks (the ``Zamboni algorithm'') is optimal and use it to develop heuristics

Moret, Bernard

388

Operation and Control of Full Ice-storage System  

E-Print Network [OSTI]

In a dividing time ice-storage system, the refrigerator does not operate during power's on-peak period, and all the cooling is supplied by the ice stored in off-peak period, so that the use of electricity can be maintained. When the ice is thawing...

Liu, Q.; Liu, Y.

2006-01-01T23:59:59.000Z

389

Water Trapping on Tidally Locked Terrestrial Planets Requires Special Conditions  

E-Print Network [OSTI]

Surface liquid water is essential for standard planetary habitability. Calculations of atmospheric circulation on tidally locked planets around M stars suggest that this peculiar orbital configuration lends itself to the trapping of large amounts of water in kilometers-thick ice on the night side, potentially removing all liquid water from the day side where photosynthesis is possible. We study this problem using a global climate model including coupled atmosphere, ocean, land, and sea-ice components as well as a continental ice sheet model driven by the climate model output. For a waterworld we find that surface winds transport sea ice toward the day side and the ocean carries heat toward the night side. As a result, night-side sea ice remains O(10 m) thick and night-side water trapping is insignificant. If a planet has large continents on its night side, they can grow ice sheets O(1000 m) thick if the geothermal heat flux is similar to Earth's or smaller. Planets with a water complement similar to Earth's w...

Yang, Jun; Hu, Yongyun; Abbot, Dorian S

2014-01-01T23:59:59.000Z

390

The Strengths of Near-Infrared Absorption Features Relevant to Interstellar and Planetary Ices  

E-Print Network [OSTI]

The abundances of ices in planetary environments have historically been obtained through measurements of near-infrared absorption features (lambda = 1.0-2.5 microns), and near-IR transmission measurements of materials present in the interstellar medium are becoming more common. For transmission measurements, the band strength (or absorption intensity) of an absorption feature must be known in order to determine the column density of an ice component. In the experiments presented here, we have measured the band strengths of the near-IR absorption features for several molecules relevant to the study of interstellar icy grain mantles and icy planetary bodies: CO (carbon monoxide), CO2 (carbon dioxide), C3O2 (carbon suboxide), CH4 (methane), H2O (water), CH3OH (methanol), and NH3 (ammonia). During a vacuum deposition, the sizes of the near-IR features were correlated with that of a studied mid-IR feature whose strength is well known from previous ice studies. These data may be used to determine ice abundances from observed near-IR spectra of interstellar and planetary materials or to predict the sizes of near-IR features in spectral searches for these molecules in astrophysical environments.

P. A. Gerakines; J. J. Bray; A. Davis; C. R. Richey

2005-02-16T23:59:59.000Z

391

Seismic reflection studies of the Amery Ice Shelf, East Antarctica: delineating meteoric and marine ice  

Science Journals Connector (OSTI)

......important role in the global climate system (Allison...studies of the impact of global warming on present-day ice shelves...the subsequent effect on global ocean circulation and...graben, where Permian coal-bearing, flat lying......

Kathleen L. McMahon; Mark A. Lackie

2006-08-01T23:59:59.000Z

392

Ice Mass Balance Buoys: A tool for measuring and attributing changes in the thickness of the Arctic sea ice cover  

E-Print Network [OSTI]

Ice Mass Balance Buoys: A tool for measuring and attributing changes in the thickness of the Arctic sea ice cover Jacqueline A. Richter-Menge1 , Donald K. Perovich1 , Bruce C. Elder1 , Keran Claffey1 Abstract Recent observational and modeling studies indicate that the Arctic sea ice cover is undergoing

Rigor, Ignatius G.

393

Polar bears could survive on persisting ice  

Science Journals Connector (OSTI)

... 2010, although the project has stopped moving forwards since the US government clamped down on offshore oil drilling after the Gulf of Mexico spill in April. Smith doesn't know ... drilling after the Gulf of Mexico spill in April. Smith doesn't know whether a rig itself would have an impact on wildlife seeking refuge on ice in a shoal, ...

Nicola Jones

2010-12-15T23:59:59.000Z

394

Stability of ice-sheet grounding lines  

Science Journals Connector (OSTI)

...for flow down shallow valleys, while the latter considers...Pine Island glacier in West Antarctica. Conclusions...Setting gives a single valley with a width equal to...presence of the internal valley, even if it is narrow...dynamical models of the West Antarctic Ice Sheet...

2010-01-01T23:59:59.000Z

395

Ocean and Sea Ice SAF Technical Note  

E-Print Network [OSTI]

Ocean and Sea Ice SAF Technical Note SAF/OSI/CDOP/KNMI/TEC/TN/165 CMOD5.n - the CMOD5 GMF SAF to produce neutral winds rather than real 10m winds. Currently, the CMOD5 Geophysical Model]. KNMI subsequently produced a CMOD5.n Lookup Table and tested the retrieved Maximum Likelihood Estimator

Stoffelen, Ad

396

Catching cosmic clues in the ice - recent results from IceCube  

E-Print Network [OSTI]

IceCube is a neutrino observatory located deep in the Antarctic glacier close to the geographical South Pole. Close to a gigaton of ice has been instrumented with optical sensors with the primary goal of searching for neutrinos from the still unknown sources of the highest-energy cosmic rays. Last year, IceCube observed for the first time ever a handful of high-energy neutrinos which must have originated outside the solar system. The discovery was named the 2013 Breakthrough of the Year by the British magazine Physics World. It is the first necessary step to actually achieve the dream of charting the places in the universe able to accelerate hadrons to energies over a million times higher than those at the LHC. The science goals of IceCube extend beyond astrophysics: IceCube is also a powerful tool for searches of dark matter and can be used to study phenomena connected to the neutrinos themselves, like neutrino oscillations. The talk will be an update on the most recent results from IceCube.

CERN. Geneva

2014-01-01T23:59:59.000Z

397

Mean free path in nuclear matter from extended Brueckner theory  

Science Journals Connector (OSTI)

The nucleon mean free path in nuclear matter is studied within the framework of the Brueckner-Hartree-Fock approximation extended to incorporate ground-state correlations. The ground state particle-hole excitations give rise to a partial opening of the Fermi sphere and to an enhancement of the mean free path above the Fermi surface. A comparison with the classical limit and the mean free path in neutron matter is discussed along with a simple prescription to include the isospin dependence.

W. Zuo; U. Lombardo; H.-J. Schulze

1998-01-01T23:59:59.000Z

398

Short time proton dynamics in bulk ice and in porous anode solid oxide fuel cell materials  

SciTech Connect (OSTI)

Oxygen reduction and incorporation into solid electrolytes and the reverse reaction of oxygen evolution play a cru-cial role in Solid Oxide Fuel Cell (SOFC) applications. However a detailed un derstanding of the kinetics of the cor-responding reactions, i.e. on reaction mechanisms, rate limiting steps, reaction paths, electrocatalytic role of materials, is still missing. These include a thorough characterization of the binding potentials experienced by protons in the lattice. We report results of Inelastic Neutron Scattering (INS) measurements of the vibrational state of the protons in Ni- YSZ highly porous composites (75% to 90% ), a ceramic-metal material showing a high electrical conductivity and ther mal stability, which is known to be most effectively used as anodes for solid ox ide fuel cells. The results are compared with INS and Deep Inelastic Neutron Scattering (DINS) experiments on the proton binding states in bulk ice.

Basoli, Francesco [Università degli Studi di Roma Tor Vergata, Italy] [Università degli Studi di Roma Tor Vergata, Italy; Senesi, Roberto [ORNL] [ORNL; Kolesnikov, Alexander I [ORNL] [ORNL; Licoccia, Silvia [NAST Center, University of Roma "Tor Vergata"] [NAST Center, University of Roma "Tor Vergata"

2014-01-01T23:59:59.000Z

399

Grounding-line migration in plan-view marine ice-sheet models: results of the ice2sea MISMIP3d intercomparison  

E-Print Network [OSTI]

models (SSA, A–HySSA) produce larger ice sheets than modelsplan-view ice-sheet models they produce different results.the Antarctic ice sheet should at least produce grounding-

2013-01-01T23:59:59.000Z

400

EECBG Success Story: Atlanta Suburb Greases the Path to Savings...  

Energy Savers [EERE]

Atlanta Suburb Greases the Path to Savings with Biodiesel The new energy efficient IT Data Center in Savannah, Georgia. | Courtesy of the City of Savannah, GA. EECBG Success...

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


401

Distributional properties of stochastic shortest paths for smuggled nuclear material  

SciTech Connect (OSTI)

The shortest path problem on a network with fixed weights is a well studied problem with applications to many diverse areas such as transportation and telecommunications. We are particularly interested in the scenario where a nuclear material smuggler tries to succesfully reach herlhis target by identifying the most likely path to the target. The identification of the path relies on reliabilities (weights) associated with each link and node in a multi-modal transportation network. In order to account for the adversary's uncertainty and to perform sensitivity analysis we introduce random reliabilities. We perform some controlled experiments on the grid and present the distributional properties of the resulting stochastic shortest paths.

Cuellar, Leticia [Los Alamos National Laboratory; Pan, Feng [Los Alamos National Laboratory; Roach, Fred [Los Alamos National Laboratory; Saeger, Kevin J [Los Alamos National Laboratory

2011-01-05T23:59:59.000Z

402

Reduction of Emission Variance by Intelligent Air Path Control  

Broader source: Energy.gov [DOE]

This poster describes an air path control concept, which minimizes NOx and PM emission variance while having the ability to run reliably with many different sensor configurations.

403

Low Carbon Growth: a Potential Path for Mexico - GHG Abatement...  

Open Energy Info (EERE)

Path for Mexico - GHG Abatement Cost Curve AgencyCompany Organization Centro Mario Molina, McKinsey and Company Sector Energy, Land Focus Area Energy Efficiency, Renewable Energy...

404

The Path to Program Sustainability | Department of Energy  

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

The Path to Program Sustainability The strategies outlined below help create self-sustaining clean energy finance programs. Prove Energy Efficiency Finance as a Profitable...

405

Hot gas path component cooling system  

DOE Patents [OSTI]

A cooling system for a hot gas path component is disclosed. The cooling system may include a component layer and a cover layer. The component layer may include a first inner surface and a second outer surface. The second outer surface may define a plurality of channels. The component layer may further define a plurality of passages extending generally between the first inner surface and the second outer surface. Each of the plurality of channels may be fluidly connected to at least one of the plurality of passages. The cover layer may be situated adjacent the second outer surface of the component layer. The plurality of passages may be configured to flow a cooling medium to the plurality of channels and provide impingement cooling to the cover layer. The plurality of channels may be configured to flow cooling medium therethrough, cooling the cover layer.

Lacy, Benjamin Paul; Bunker, Ronald Scott; Itzel, Gary Michael

2014-02-18T23:59:59.000Z

406

Microsoft PowerPoint - KLEIN_ARM_STM08_POSTER.ppt  

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

average both SCMs average both SCMs and CRMs underestimate the amount of supercooled water by a factor of 3. Models simulations of ice water path are more consistent with observations. Liquid Water Path Versus Ice Water Path Liquid Water Path Versus Ice Water Path liquid water path (g m -2 ) ice water path (g m -2 ) 171 A = Aircraft S = Radar/Lidar retrievals (Shupe) W = Radar/Lidar retrievals (Wang) Observational Uncertainty Rectangle Symbol Key for Models Symbol Key for Observations LLNL-POST-401952 This work is supported by the Office of Science of the United States Department of Energy as part of the ARM program. This work was performed under the auspices of the U. S. Department of Energy by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344. Co-Authors Andy Ackerman, Alex Avramov, Gijs

407

Steam turbine path evaluation during maintenance  

SciTech Connect (OSTI)

The deterioration of a turbine (Steam & Gas) flow path affects the efficiency of the turbine. The most critical factors which affect the efficiency of turbines are: wearing out of the trailing edges of the blades by solid particle erosion, deposits, material loss due to corrosion (also sand blast) which increases the flow area, increases in blade surface roughness, etc. Wearing out of the seals caused by shaft vibrations or rapid start-up leads to significant leakage losses. Some of these effects can be estimated with some precision during operation of the turbine, but an exact evaluation can be carried out during a maintenance applying a special fluid flow analysis program. Such a program has been developed and then adapted to achieve this goal. During maintenance the complete geometry of the steam path is measured (blades lengths, widths, angles, clearances, etc.) in the condition encountered before any corrections. Then the similar measurement is undertaken after, for example, clearance corrections, blade replacements, cleaning of the blades, etc. Using the program first of all the design data is calculated. Then the actual data is fed into the program and compared to the design data. Thus the effect of the blade surface roughness, increased seal clearances, flow area increase, solid particle damage to the trailing edge and so on for each particular stage is calculated. The effect is expressed in [kW] as a deviation from the design points. This data can be helpful during online evaluation of the turbine performance. This evaluation helps the management of the plant in undertaking the correct decision concerning the date of the next major maintenance and replacement part procurement. Many turbines in the Mexican utility have been evaluated in such a manner. Some examples are presented.

Kubiak, J.; Angel, F. del; Carnero, A.; Campos, A. [Instituto de Investigaciones Electricas, Temixo, Morelos (Mexico)] [and others

1996-07-01T23:59:59.000Z

408

Sum-frequency spectroscopic studies: I. Surface melting of ice, II. Surface alignment of polymers  

SciTech Connect (OSTI)

Surface vibrational spectroscopy via infrared-visible sum-frequency generation (SFG) has been established as a useful tool to study the structures of different kinds of surfaces and interfaces. This technique was used to study the (0001) face of hexagonal ice (Ih). SFG spectra in the O-H stretch frequency range were obtained at various sample temperatures. For the vapor(air)/ice interface, the degree of orientational order of the dangling OH bonds at the surface was measured as a function of temperature. Disordering sets in around 200 K and increases dramatically with temperature, which is strong evidence of surface melting of ice. For the other ice interfaces (silica/OTS/ice and silica/ice), a similar temperature dependence of the hydrogen bonded OH stretch peak was observed; the free OH stretch mode, however, appears to be different from that of the vapor (air)/ice interface due to interactions at the interfaces. The technique was also used to measure the orientational distributions of the polymer chains on a rubbed polyvinyl alcohol surface. Results show that the polymer chains at the surface appear to be well aligned by rubbing, and the adsorbed liquid crystal molecules are aligned, in turn, by the surface polymer chains. A strong correlation exists between the orientational distributions of the polymer chains and the liquid crystal molecules, indicating that the surface-induced bulk alignment of a liquid crystal film by rubbed polymer surfaces is via an orientational epitaxy-like mechanism. This thesis also contains studies on some related issues that are crucial to the above applications. An experiment was designed to measure SFG spectra in both reflection and transmission. The result confirms that SFG in reflection is generally dominated by the surface contribution. Another issue is the motional effect due to fast orientational motion of molecules at a surface or interface. Calculations show that the effect is significant if the molecular orientation varies over a broad range within the vibrational relaxation time. The stretch vibration of the free OH bonds at the vapor/water interface is used to illustrate the importance of the effect.

Wei, Xing

2000-12-21T23:59:59.000Z

409

Water, water everywhere  

Science Journals Connector (OSTI)

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

Philip Ball

2000-01-27T23:59:59.000Z

410

Revised estimates of Greenland ice sheet thinning histories based on ice-core records  

Science Journals Connector (OSTI)

Ice core records were recently used to infer elevation changes of the Greenland ice sheet throughout the Holocene. The inferred elevation changes show a significantly greater elevation reduction than those output from numerical models, bringing into question the accuracy of the model-based reconstructions and, to some extent, the estimated elevation histories. A key component of the ice core analysis involved removing the influence of vertical surface motion on the ?18O signal measured from the Agassiz and Renland ice caps. We re-visit the original analysis with the intent to determine if the use of more accurate land uplift curves can account for some of the above noted discrepancy. To improve on the original analysis, we apply a geophysical model of glacial isostatic adjustment calibrated to sea-level records from the Queen Elizabeth Islands and Greenland to calculate the influence of land height changes on the ?18O signal from the two ice cores. This procedure is complicated by the fact that ?18O contained in Agassiz ice is influenced by land height changes distant from the ice cap and so selecting a single location at which to compute the land height signal is not possible. Uncertainty in this selection is further complicated by the possible influence of Innuitian ice during the early Holocene (12–8 ka BP). Our results indicate that a more accurate treatment of the uplift correction leads to elevation histories that are, in general, shifted down relative to the original curves at GRIP, NGRIP, DYE-3 and Camp Century. In addition, compared to the original analysis, the 1-? uncertainty is considerably larger at GRIP and NGRIP. These changes reduce the data-model discrepancy reported by Vinther et al. (2009) at GRIP, NGRIP, DYE-3 and Camp Century. A more accurate treatment of isostasy and surface loading also acts to improve the data-model fits such that the residuals at all four sites for the period 8 ka BP to present are significantly reduced compared to the original analysis. Prior to 8 ka BP, the possible influence of Innuitian ice on the inferred elevation histories prevents a meaningful comparison.

Benoit S. Lecavalier; Glenn A. Milne; Bo M. Vinther; David A. Fisher; Arthur S. Dyke; Matthew J.R. Simpson

2013-01-01T23:59:59.000Z

411

Mitigation Action Plan for Los Banos - Gates (Path 15) Transmission Project (DOE/EIS-0128) (12/3/03)  

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

2 Date: December 3, 2003 1 2 Date: December 3, 2003 1 Western Area Power Administration Mitigation Action Plan for the Los Banos - Gates (Path 15) Transmission Project 1.0 INTRODUCTION 1.1 HISTORY AND BACKGROUND In May 2001, Secretary of Energy Spencer Abraham directed the Western Area Power Administration (Western) to take the first steps, including the preparation of environmental studies, toward developing the Los Banos - Gates Transmission Project, also known as the Path 15 Project. This directive was issued to carry out a recommendation in the May 2001 National Energy Policy. Western is a power marketing administration within the Department of Energy (DOE) whose role is to market and transmit electricity from multi-use water projects in the western United States, including California. The Path 15 Project, located in California's western

412

Numerical study of convection heat transfer during the melting of ice in a porous layer  

SciTech Connect (OSTI)

A numerical study is made of the melting of ice in a rectangular porous cavity heated from above. The Landau transformation is used to immobilize the ice-water interface, and the Darcy-Boussinesq equations are solved by a finite-difference technique. Results are analyzed in terms of the heating temperature and the aspect ratio of the cavity. A comparison is made with the case of melting from below. It was found that melting from above is more effective than melting from below when the heating temperature is between 0 and 8 C: convection arises earlier, the melting process is faster, and the total melt at steady state is thicker. The critical time for onset of convection is minimum when the upper boundary is heated at 6 C. At this heating temperature, one also obtains a maximum heat transfer rate (Nusselt number).

Zhang, X.; Nguyen, T.H. (Ecole Polytechnique de Montreal, Quebec (Canada). Dept. of Mechanical Engineering)

1994-05-01T23:59:59.000Z

413

Evaluation of a solar intermittent refrigeration system for ice production operating with ammonia/lithium nitrate  

SciTech Connect (OSTI)

A novel solar intermittent refrigeration system for ice production developed in the Centro de Investigacion en Energia of the Universidad Nacional Autonoma de Mexico is presented. The system operates with the ammonia/lithium nitrate mixture. The system developed has a nominal capacity of 8 kg of ice/day. It consists of a cylindrical parabolic collector acting as generator-absorber. Evaporator temperatures as low as -11 C were obtained for several hours with solar coefficients of performance up to 0.08. It was found that the coefficient of performance increases with the increment of solar radiation and the solution concentration. A dependency of the coefficient of performance was not founded against the cooling water temperature. Also it was found that the maximum operating pressure increases meanwhile the generation temperature decreases with an increase of the solution concentration. (author)

Rivera, W.; Moreno-Quintanar, G.; Best, R. [Centro de Investigacion en Energia, Universidad Nacional Autonoma de Mexico, A.P. 34, 62580 Temixco, Mor. (Mexico); Rivera, C.O.; Martinez, F. [Facultad de Ingenieria Campus Coatzacoalcos, Universidad Veracruzana, Av. Universidad Km 7.5, 96530 Coatzacoalcos, Ver. (Mexico)

2011-01-15T23:59:59.000Z

414

Main-belt comets as tracers of ice in the inner Solar system  

E-Print Network [OSTI]

As a recently recognized class of objects exhibiting apparently cometary (sublimation-driven) activity yet orbiting completely within the main asteroid belt, main-belt comets (MBCs) have revealed the existence of present-day ice in small bodies in the inner solar system and offer an opportunity to better understand the thermal and compositional history of our solar system, and by extension, those of other planetary systems as well. Achieving these overall goals, however, will require meeting various intermediate research objectives, including discovering many more MBCs than the currently known seven objects in order to ascertain the population's true abundance and distribution, confirming that water ice sublimation is in fact the driver of activity in these objects, and improving our understanding of the physical, dynamical, and thermal evolutionary processes that have acted on this population over the age of the solar system.

Hsieh, Henry H

2014-01-01T23:59:59.000Z

415

ICE Cleaning Test Report.PDF  

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

16 16 FIELD DEMONSTRATION OF THE ICE 250 TM CLEANING SYSTEM AT THE ROCKY MOUNTAIN OILFIELD TESTING CENTER CASPER, WYOMING August 18-19, 1999 Date Published: October 5, 1999 J.L. Johnston L.M. Jackson PREPARED FOR THE UNITED STATES DEPARTMENT OF ENERGY/ROCKY MOUNTAIN OILFIELD TESTING CENTER Work Performed Under Rocky Mountain Oilfield Testing Center (RMOTC) CRADA No. 99-009 TABLE OF CONTENTS Abstract.............................................................................................................................................1 Introduction.......................................................................................................................................1 Product Description ...........................................................................................................................1

416

New physics with IceCube  

Science Journals Connector (OSTI)

IceCube, a cubic kilometer neutrino telescope, will be capable of probing neutrino-nucleon interactions in the ultrahigh energy regime, far beyond the energies reached by colliders. In this article we introduce a new observable that combines several advantages; it only makes use of the upward-going neutrino flux, so that the Earth filters the atmospheric muons, and it is only weakly dependent on the initial astrophysical flux uncertainties.

Matias M. Reynoso and Oscar A. Sampayo

2007-08-17T23:59:59.000Z

417

Cost effective path to DEMO University of Washington  

E-Print Network [OSTI]

1 Cost effective path to DEMO By Tom Jarboe University of Washington To Fusion Power Associates December 14, 2011 #12;2 Outline · Maximizing the development-cost benefit from ITER knowledge · Getting on cost effective path · Requirements of smaller scale experiment · Cost problems are helped

418

Estimating Distances Using Least Cost Path Algorithms Rodney J. Dyer  

E-Print Network [OSTI]

Estimating Distances Using Least Cost Path Algorithms Rodney J. Dyer February 27, 2012 Overview This vignette covers the methods necessary to take a raster and estimate the least cost path distance between points. In doing so, this will cover: 1. Load in a 'raster blank' 2. Modify the raster to change relative

Dyer, Rodney J.

419

VISCOSITY SOLUTIONS OF FULLY NONLINEAR ELLIPTIC PATH DEPENDENT PDES  

E-Print Network [OSTI]

VISCOSITY SOLUTIONS OF FULLY NONLINEAR ELLIPTIC PATH DEPENDENT PDES ZHENJIE REN Abstract, inspired by [3], we define the viscosity solution, by using the nonlinear expectation. The paper contains , that for any bounded viscosity subsolution u1 and Key words and phrases. Path dependent PDEs, Dirichlet problem

Paris-Sud XI, Université de

420

Visibility in Discrete Geometry: an application to discrete geodesic paths  

E-Print Network [OSTI]

Visibility in Discrete Geometry: an application to discrete geodesic paths David Coeurjolly that are visible from a source pixel. Based on these definitions, we define discrete geodesic paths in dis- crete domain with obstacles. This allows us to introduce a new geodesic metric in discrete geometry

Paris-Sud XI, Université de

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


421

Elastic pathing: your speed is enough to track you  

Science Journals Connector (OSTI)

Today, people have the opportunity to opt-in to usage-based automotive insurances for reduced premiums by allowing companies to monitor their driving behavior. Several companies claim to measure only speed data to preserve privacy. With our elastic pathing ... Keywords: destination prediction, elastic pathing, location privacy, usage-based automotive insurance

Xianyi Gao, Bernhard Firner, Shridatt Sugrim, Victor Kaiser-Pendergrast, Yulong Yang, Janne Lindqvist

2014-09-01T23:59:59.000Z

422

Cables, Paths and \\Subconscious" Reasoning Propositional Semantic Networks  

E-Print Network [OSTI]

Cables, Paths and \\Subconscious" Reasoning in Propositional Semantic Networks Stuart C. Shapiro represented by the propositional node, the label This is a preliminary version of S. C. Shapiro, Cables, paths-7022 (716) 636-3182 shapiro@cs.bu alo.edu 1 Introduction In this paper, I will discuss two aspects of SNe

Shapiro, Stuart C.

423

Path planning approach based on flock dynamics of moving particles  

Science Journals Connector (OSTI)

A novel method based on the behaviour of a flock of moving particles is proposed in order to solve the path planning problem of a mobile robot in two-dimensional dynamical sceneries. The mentioned particles search free obstacles zones into the scenery ... Keywords: Autonomous mobile robot, Dynamic environments, Moving obstacles, Navigation, Path planning, Swarm behaviour, Trajectory planning

JesúS EspelosíN; Leopoldo Acosta; Daniel Alonso

2013-04-01T23:59:59.000Z

424

Integrative path planning and motion control for handling large components  

Science Journals Connector (OSTI)

For handling large components a large workspace and high precision are required. In order to simplify the path planning for automated handling systems, this task can be divided into global, regional and local motions. Accordingly, different types of ... Keywords: integrative production, motion control, path planning, robotic assembly application

Rainer Müller; Martin Esser; Markus Janssen

2011-12-01T23:59:59.000Z

425

UAV PATH FOLLOWING FOR TARGET OBSERVATION IN WIND  

E-Print Network [OSTI]

UAV PATH FOLLOWING FOR TARGET OBSERVATION IN WIND Rolf Rysdyk, University of Washington, Seattle is affected by wind, aircraft performance, and camera limits. Analytic expressions are derived for paths which, and stability of its integration with aircraft dynamics is assessed. An observer estimates wind data, which

Washington at Seattle, University of

426

Improved method for calculating projected frequencies along a reaction path  

E-Print Network [OSTI]

and calculating projected frequencies perpendicular to the reaction path have been examined. The SN2 reaction. The identity SN2 reaction of chloride with methyl chlo- ride is a suitable test case for exploring the accuracyImproved method for calculating projected frequencies along a reaction path Anwar G. Baboul and H

Schlegel, H. Bernhard

427

Pattern formation, logistics, and maximum path probability  

Science Journals Connector (OSTI)

The concept of pattern formation, which to current researchers is a synonym for self-organization, carries the connotation of deductive logic together with the process of spontaneous inference. Defining a pattern as an equivalence relation on a set of thermodynamic objects, we establish that a large class of irreversible pattern-forming systems, evolving along idealized quasisteady paths, approaches the stable steady state as a mapping upon the formal deductive imperatives of a propositional function calculus. In the preamble the classical reversible thermodynamics of composite systems is analyzed as an externally manipulated system of space partitioning and classification based on ideal enclosures and diaphragms. The diaphragms have discrete classificationcapabilities which are designated in relation to conserved quantities by descriptors such as impervious, diathermal, and adiabatic. Differentiability in the continuum thermodynamic calculus is invoked as equivalent to analyticity and consistency in the underlying class or sentential calculus. The seat of inference, however, rests with the thermodynamicist. In the transition to an irreversible pattern-forming system the defined nature of the composite reservoirs remains, but a given diaphragm is replaced by a pattern-forming system which by its nature is a spontaneously evolving volume partitioner and classifier of invariants. The seat of volition or inference for the classification system is thus transferred from the experimenter or theoretician to the diaphragm, and with it the full deductive facility. The equivalence relations or partitions associated with the emerging patterns may thus be associated with theorems of the natural pattern-forming calculus. The entropyfunction, together with its derivatives, is the vehicle which relates the logistics of reservoirs and diaphragms to the analog logistics of the continuum. Maximum path probability or second-order differentiability of the entropy in isolation are sufficiently strong interpretations of the second law of thermodynamics to define the approach to and the nature of patterned stable steady states. For many pattern-forming systems these principles define quantifiable stable states as maxima or minima (or both) in the dissipation. An elementary statistical-mechanical proof is offered. To turn the argument full circle, the transformations of the partitions and classes which are predicated upon such minimax entropic paths can through digital modeling be directly identified with the syntactic and inferential elements of deductive logic. It follows therefore that all self-organizing or pattern-forming systems which possess stable steady states approach these states according to the imperatives of formal logic, the optimum pattern with its rich endowment ofequivalence relations representing the central theorem of the associated calculus. Logic is thus ‘‘the stuff of the universe,’’ and biological evolution with its culmination in the human brain is the most significant example of all the irreversible pattern-forming processes. We thus conclude with a few remarks on the relevance of the contribution to the theory of evolution and to research on artificial intelligence.

J. S. Kirkaldy

1985-05-01T23:59:59.000Z

428

ICE LINES IN CIRCUMBINARY PROTOPLANETARY DISKS  

SciTech Connect (OSTI)

I examine the position of the ice line in circumbinary disks heated by steady mass accretion and stellar irradiation and compare with the critical semimajor axis, interior to which planetary orbits are unstable. There is a critical binary separation, dependent on the binary parameters and disk properties, for which binaries with separations larger than this critical value have ice lines that lie interior to the boundary of stability. For an equal-mass binary comprised of 1 M{sub Sun} components, this critical separation is Almost-Equal-To 1.04 AU, and scales weakly with mass accretion rate and Rosseland mean opacity ({proportional_to}[ M-dot {kappa}{sub R}]{sup 2/9}). Assuming a steady mass accretion rate of M-dot {approx}10{sup -8} M{sub Sun} yr{sup -1} and a Rosseland mean opacity of {kappa}{sub R} {approx} 1 cm{sup 2} g{sup -1}, I show that {approx}> 80% of all binary systems with component masses M{sub *} {approx}< 2.0 M{sub Sun} have ice lines that lie interior to the critical semimajor axis. This suggests that rocky planets should not form in these systems, a prediction which can be tested by looking for planets around binaries with separations larger than the critical separation with Kepler (difficult) and with microlensing.

Clanton, Christian, E-mail: clanton@astronomy.ohio-state.edu [Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH 43210 (United States)

2013-05-01T23:59:59.000Z

429

Water Resources Water Quality and Water Treatment  

E-Print Network [OSTI]

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

Sohoni, Milind

430

Solar Decathlon 2013 Infographic: The Path to a Brighter Future |  

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

Infographic: The Path to a Brighter Future Infographic: The Path to a Brighter Future Solar Decathlon 2013 Infographic: The Path to a Brighter Future September 13, 2013 - 11:50am Addthis Our latest infographic -- Solar Decathlon 2013: The Path to a Brighter Future -- takes a look at the teams competing in this year’s competition and highlights innovative design features in each of the teams’ houses. Not featured in the "Meet the Teams" section, Team Texas will also compete at Solar Decathlon 2013 with their ADAPT house. | Infographic by Sarah Gerrity, Energy Department. Our latest infographic -- Solar Decathlon 2013: The Path to a Brighter Future -- takes a look at the teams competing in this year's competition and highlights innovative design features in each of the teams' houses.

431

Solar Decathlon 2013 Infographic: The Path to a Brighter Future |  

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

Solar Decathlon 2013 Infographic: The Path to a Brighter Future Solar Decathlon 2013 Infographic: The Path to a Brighter Future Solar Decathlon 2013 Infographic: The Path to a Brighter Future September 13, 2013 - 11:50am Addthis Our latest infographic -- Solar Decathlon 2013: The Path to a Brighter Future -- takes a look at the teams competing in this year’s competition and highlights innovative design features in each of the teams’ houses. Not featured in the "Meet the Teams" section, Team Texas will also compete at Solar Decathlon 2013 with their ADAPT house. | Infographic by Sarah Gerrity, Energy Department. Our latest infographic -- Solar Decathlon 2013: The Path to a Brighter Future -- takes a look at the teams competing in this year's competition

432

NOAA Technical Memorandum ERL GLERL-20 SUMMARY OF GREAT LAKES WEATHER AND ICE CONDITIONS,  

E-Print Network [OSTI]

Cooling Phase 3.2.2 Ice Formation and Breakup Phases 3.2.3 The Ice Cycle on Lake Superior 3.2.4 The IceNOAA Technical Memorandum ERL GLERL-20 SUMMARY OF GREAT LAKES WEATHER AND ICE CONDITIONS, WINTER of this NOAA Environmental Research Laboratories publication. ii #12;LANDSAT fake color image of ice cover

433

Changes of Myofibrillar Proteins and Texture in Freshwater Prawn, Macrobrachium rosenbergii, During Iced Storage  

E-Print Network [OSTI]

in an ice slurry. Upon death, whole prawns were stored in slush ice in an insulated container at O°C. After, During Iced Storage H. W. KYE, W. K. NIP and J. H. MOY Introduction Shelf life of ice-chilled freshwater in penaid shrimp dur ing iced storage and demonstrated myo fibrillar breakdown, especially Z

434

NAO influence on net sea ice production and exchanges in the Arctic region: a numerical study  

E-Print Network [OSTI]

ice cover suppresses the development of thermal insulation during the ice formation processNAO influence on net sea ice production and exchanges in the Arctic region: a numerical study Aixue The variability of net sea ice production and sea ice exchange between the Arctic and its adjacent seas

Hu, Aixue

435

HiRISE observations of new impact craters exposing Martian ground ice  

E-Print Network [OSTI]

ice rather than ice-cemented regolith. Although some clean ice may be produced by the impact processHiRISE observations of new impact craters exposing Martian ground ice Colin M. Dundas1 , Shane craters or clusters have been observed to excavate bright material inferred to be ice at mid

Byrne, Shane

436

A model of the threedimensional evolution of Arctic melt ponds on firstyear and multiyear sea ice  

E-Print Network [OSTI]

ice. In the summer the upper layers of sea ice and snow melts producing meltwater that accumulatesA model of the threedimensional evolution of Arctic melt ponds on firstyear and multiyear sea ice F in Arctic melt ponds on the surface of sea ice. An accurate estimate of the fraction of the sea ice surface

Feltham, Daniel

437

ARM - Publications: Science Team Meeting Documents: Investigation of Ice  

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

Investigation of Ice Crystal Shapes Using Multi-resolution Techniques Investigation of Ice Crystal Shapes Using Multi-resolution Techniques McFarquhar, Greg University of Illinois Better knowledge of small-scale features from ice crystals are needed to determine their effects on radiation and hence to improve the treatment of clouds in climate models. With the Cloud Particle Imager (CPI) it is now possible to capture ice crystal images with 2.3 μm resolution and 256 gray scales of illumination, providing an unprecedented wealth of information to utilize in the ongoing quest to understand the small scale structure of ice crystals. In this study, we applied wavelet and fractal analysis to CPI images of ice crystals collected in cirrus by the University of North Dakota Citation during the Intensive Observation Period at the Southern

438

STATEMENT OF WORK (SOW) TEMPLATE FOR ICE SUPPORT CONTRACTOR  

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

ICE SUPPORT CONTRACTOR ICE SUPPORT CONTRACTOR The template presented below is a Statement of Work (SOW) for services of an ICE Support Contractor for assisting OECM in conducting an ICE. Project and review specific information should be incorporated. Explanatory text appears in italics, while information that should be selected appears in >. The format and contents of this SOW is not compulsory, and the use is at the discretion of the OECM Analysts, tailored as appropriate for the desired contractor support activities. If no contractor support is required, this appendix is not used. Statement of Work for Independent Cost Estimate (ICE) > <ICE (i.e., Alternative Selection and Cost Range (CD-1), Establish

439

NGNP Program 2013 Status and Path Forward  

SciTech Connect (OSTI)

High temperature gas-cooled reactor (HTGR) technology can play an important role in the energy future of the United States by extending the use of nuclear energy for non-electricity energy production missions, as well as continuing to provide a considerable base load electric power generation capability. Extending nuclear energy into the industrial and transportation sectors through the coproduction of process heat and electricity provides safe, reliable energy for these sectors in an environmentally responsible manner. The modular HTGR provides a substantial improvement in nuclear plant safety for the protection of the public and the environment, and supports collocation of the HTGRhigh temperature gas-cooled reactor with major industrial facilities. Under U.S. Department of Energy direction since 2006, the Next Generation Nuclear Plant Project at Idaho National Laboratory has been working toward commercializing the HTGR technology. However, a recent decision by the Secretary of Energy to reduce the scope of the Next Generation Nuclear Plant Project to a research and development program, considerable realignment has taken place. This report: (1) summarizes the accomplishments of the Next Generation Nuclear Plant Program from FY2011 through FY2013; (2) lays out the path forward necessary to achieve the ultimate objective of commercializing HTGR technology; and (3) discusses ongoing technical, licensing, and evaluation activities under the realigned Next Generation Nuclear Plant program considered important to preserve the significant investment made by the government to-date and to maintain some progress in meeting the objectives of the Energy Policy Act of 2005 (EPAct2005).

Hans Gougar

2014-03-01T23:59:59.000Z

440

IceCube Project Monthly Report August 2005  

E-Print Network [OSTI]

IceCube Project Monthly Report August 2005 Accomplishments All of the DOMs installed at the South additional emphasis on training and procedures. The training program for IceCube personnel scheduled to work-05 S-05 O-05 N-05 D-05 J-06 F-06 M-06 3&4 FY06 FY07 FY08 FY09 FY10 FY11 IceCube Project Baseline

Saffman, Mark

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


441

ICE CORES | History of Research, Greenland and Antarctica  

Science Journals Connector (OSTI)

Abstract Ice samples collected from polar ice sheets have been used to study past climate changes going almost as far back as 1 My. The first ice core projects in the 1960s identified major climate transitions. Subsequent projects have shown that abrupt climate changes have occurred many times in the past and that there is a close link between high levels of atmospheric carbon dioxide and warm climate conditions.

M. Aydin

2013-01-01T23:59:59.000Z

442

ICE CORES | History of Research, Greenland and Antarctica  

Science Journals Connector (OSTI)

Ice samples collected from the polar ice sheets have been used to study past climate changes during the last million years. The first ice-core projects in the 1960s identified the major climate periods. Subsequent projects have shown that abrupt climate changes have occurred many times in the past and that there is a close link between high levels of atmospheric carbon dioxide and warm climate conditions.

K. Taylor

2007-01-01T23:59:59.000Z

443

Thursday, March 16, 2006 POSTER SESSION II: WATER ON THE MOON  

E-Print Network [OSTI]

ice validation missions may be landed in areas with direct line-of-sight to Earth, eliminating. Asphaug E. Plesko C. Water Delivered to the Moon by Comet Impacts [#2450] We calculate the fate

Rathbun, Julie A.

444

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

E-Print Network [OSTI]

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

445

Argonne Lab Director Peter Littlewood accepts Ice Bucket Challenge...  

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

Argonne Lab Director Peter Littlewood accepts Ice Bucket Challenge Share Browse By - Any - Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering...

446

Optimal Control of Harvesting Ice Thermal Storage Systems  

E-Print Network [OSTI]

for optimal control of a harvesting ice storage system. A simplified procedure is used to develop 24 hour load data. Example installations will be shown....

Knebel, D. E.

1988-01-01T23:59:59.000Z

447

Ice structure monitoring with an optical fiber sensing system  

Science Journals Connector (OSTI)

Ice has been used as an effective and economical material for constructions of roads and platforms in cold regions. However, the practical applications of this brittle material are limited by the fact that ice structures can suddenly crack due to low tensile strength, be crushed due to excessive compression, melt and become soften as temperature elevates. In this paper, an early warning system is proposed to monitor the strain state and damage characteristic of ice structures. Firstly, both fiber Bragg grating (FBG) and Brillouin optical time domain analysis/reflectometry (BOTDA/R) sensors were installed in an ice block and an ice beam to understand their axial and flexural behaviors under a concentrated load. Secondly, the solution for strain state and damage process of ice structures was derived analytically under test conditions. Finally, an outdoor ice road test bed was built and continuously monitored for 34 h to validate the early warning system and understand the early stage behavior of ice structures. The experimental results agreed well with their corresponding theoretical predictions. The early warning system with optical sensors is effective and practical for long-term monitoring for ice structures.

Zhi Zhou; Minghua Huang; Jianping He; Genda Chen; Jinping Ou

2010-01-01T23:59:59.000Z

448

ARM-UAV TWP-ICE Activities and Data  

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

instrument operational status, data availability and daily flight details for the ARM-UAV Proteus payload flown during the TWP-ICE experiment are presented. Data was also...

449

Covered Product Category: Air-Cooled Ice Machines  

Broader source: Energy.gov [DOE]

The Federal Energy Management Program (FEMP) provides acquisition guidance for air-cooled ice machines, which are covered by the ENERGY STAR program.

450

IceCube: A Cubic Kilometer Radiation Detector  

SciTech Connect (OSTI)

IceCube is a 1 km{sup 3} neutrino detector now being built at the Amudsen-Scott South Pole Station. It consists of 4800 Digital Optical Modules (DOMs) which detect Cherenkov radiation from the charged particles produced in neutrino interactions. IceCube will observe astrophysical neutrinos with energies above about 100 GeV. IceCube will be able to separate {nu}{sub {mu}}, {nu}{sub t}, and {nu}{sub {tau}} interactions because of their different topologies. IceCube construction is currently 50% complete.

IceCube Collaboration; Klein, Spencer R; Klein, S.R.

2008-06-01T23:59:59.000Z

451

Sandia National Laboratories: Ice-Sheet Simulation Code Matures...  

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

and Antarctic Ice Sheets, with particular attention to their contributions to global sea-level rise. Our recent highlight is the successful completion of a controlled mesh...

452

Team advances understanding of the Greenland Ice Sheet's meltwater...  

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

for Greenland in the future, but its impact on ice sheet flux and associated sea level rise is uncertain: direct observations of the subglacial drainage system are lacking...

453

Reducing uncertainty in high-resolution sea ice models.  

SciTech Connect (OSTI)

Arctic sea ice is an important component of the global climate system, reflecting a significant amount of solar radiation, insulating the ocean from the atmosphere and influencing ocean circulation by modifying the salinity of the upper ocean. The thickness and extent of Arctic sea ice have shown a significant decline in recent decades with implications for global climate as well as regional geopolitics. Increasing interest in exploration as well as climate feedback effects make predictive mathematical modeling of sea ice a task of tremendous practical import. Satellite data obtained over the last few decades have provided a wealth of information on sea ice motion and deformation. The data clearly show that ice deformation is focused along narrow linear features and this type of deformation is not well-represented in existing models. To improve sea ice dynamics we have incorporated an anisotropic rheology into the Los Alamos National Laboratory global sea ice model, CICE. Sensitivity analyses were performed using the Design Analysis Kit for Optimization and Terascale Applications (DAKOTA) to determine the impact of material parameters on sea ice response functions. Two material strength parameters that exhibited the most significant impact on responses were further analyzed to evaluate their influence on quantitative comparisons between model output and data. The sensitivity analysis along with ten year model runs indicate that while the anisotropic rheology provides some benefit in velocity predictions, additional improvements are required to make this material model a viable alternative for global sea ice simulations.

Peterson, Kara J.; Bochev, Pavel Blagoveston

2013-07-01T23:59:59.000Z

454

A new ice thickness and bedrock data set for the Greenland ice sheet. R.L. Layberry, J.L. Bamber,  

E-Print Network [OSTI]

combined with data collected by the Technical University of Denmark in the 1970's to produce a new iceA new ice thickness and bedrock data set for the Greenland ice sheet. R.L. Layberry, J.L. Bamber of Kansas, Lawrence, KS 66045, 785/864-2700, U.S. Abstract - Ice thickness data collected between 1993

Kansas, University of

455

Integrated tephrochronology of the West Antarctic region-Implications for a potential tephra record in the West Antarctic Ice Sheet (WAIS) Divide Ice Core  

E-Print Network [OSTI]

(tephra) and aerosols , produced during major explosive eruptions. Tephra layers in ice cores can provide record in the West Antarctic Ice Sheet (WAIS) Divide Ice Core N.W. Dunbar,1 W.C. McIntosh,1 A.V. Kurbatov@albion.edu) Ice cores from polar regions, in addition to being a climate archives, also capture volcanic particles

Dunbar, Nelia W.

456

Modeling the High-Frequency Component of Arctic Sea Ice Drift and Deformation  

Science Journals Connector (OSTI)

Buoy observations of sea ice drift show that sea ice motion and deformation contain substantial high-frequency variability at subdaily timescales. However, numerical simulations of the sea ice dynamics normally do not include processes on such ...

Petra Heil; William D. Hibler III

2002-11-01T23:59:59.000Z

457

E-Print Network 3.0 - aircraft icing training Sample Search Results  

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

Summary: effects on aircraft performance. Although anti-icing devices such as de-icing boots and heating strips... help, ice accretions can still build up and affect the aircraft...

458

Fractionation of Dissolved Solutes and Chromophoric Dissolved Organic Matter During Experimental Sea Ice Formation.  

E-Print Network [OSTI]

In the past decade there has been an overall decrease in Arctic Ocean sea ice cover. Changes to the ice cover have important consequences for organic carbon cycling, especially over the continental shelves. When sea ice is formed, dissolved organic...

Smith, Stephanie 1990-

2012-04-16T23:59:59.000Z

459

Dynamics of ice shelf rift propagation and iceberg calving inferred from geodetic and seismic observations  

E-Print Network [OSTI]

ice at the base of the ice shelf could produce a thicknessthat may produce larger amounts of marine ice near one riftice shelf com- bined with large Antarctic storm systems can produce

Bassis, Jeremy N.

2007-01-01T23:59:59.000Z

460

ARM - Measurement - Total cloud water  

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

cloud water cloud water ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Total cloud water The total concentration (mass/vol) of ice and liquid water particles in a cloud; this includes condensed water content (CWC). Categories Cloud Properties Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. External Instruments NCEPGFS : National Centers for Environment Prediction Global Forecast System Field Campaign Instruments CSI : Cloud Spectrometer and Impactor PDI : Phase Doppler Interferometer

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


461

The Little Ice Age as Recorded in the Stratigraphy of the Tropical Quelccaya Ice Cap  

Science Journals Connector (OSTI)

...1500-YEAR RECORD OF TROPICAL PRECIPITATION IN ICE CORES FROM THE...values associated with winter snowfall (5). Sum-mer...During the eruptive phase, 19 February to 6 March...than 80% ofthe annual precipitation falls in the wet season...analysis, K. Doddroe for typing and R. Tope for the...

L. G. THOMPSON; E. MOSLEY-THOMPSON; W. DANSGAARD; P. M. GROOTES

1986-10-17T23:59:59.000Z

462

Probing leptoquark production at IceCube  

Science Journals Connector (OSTI)

We emphasize the inelasticity distribution of events detected at the IceCube neutrino telescope as an important tool for revealing new physics. This is possible because the unique energy resolution at this facility allows to separately assign the energy fractions for emergent muons and taus in neutrino interactions. As a particular example, we explore the possibility of probing second and third generation leptoquark parameter space (coupling and mass). We show that production of leptoquarks with masses ?250??GeV and diagonal generation couplings of O(1) can be directly tested if the cosmic neutrino flux is at the Waxman-Bahcall level.

Luis A. Anchordoqui; Carlos A. García Canal; Haim Goldberg; Daniel Gomez Dumm; Francis Halzen

2006-12-29T23:59:59.000Z

463

Energy efficient control of HVAC systems with ice cold thermal energy storage  

Science Journals Connector (OSTI)

Abstract In heating, ventilation and air conditioning (HVAC) systems of medium/high cooling capacity, energy demands can be matched with the help of thermal energy storage (TES) systems. If properly designed, TES systems can reduce energy costs and consumption, equipment size and pollutant emissions. In order to design efficient control strategies for TES systems, we present a model-based approach with the aim of increasing the performance of HVAC systems with ice cold thermal energy storage (CTES). A simulation environment based on Matlab/Simulink® is developed, where thermal behaviour of the plant is analysed by a lumped formulation of the conservation equations. In particular, the ice CTES is modelled as a hybrid system, where the water phase transitions (solid–melting–liquid and liquid–freezing–solid) are described by combining continuous and discrete dynamics, thus considering both latent and sensible heat. Standard control strategies are compared with a non-linear model predictive control (NLMPC) approach. In the simulation examples model predictive control proves to be the best control solution for the efficient management of ice CTES systems.

Alessandro Beghi; Luca Cecchinato; Mirco Rampazzo; Francesco Simmini

2014-01-01T23:59:59.000Z

464

Drilling and operational sounds from an oil production island in the ice-covered Beaufort Sea  

Science Journals Connector (OSTI)

Recordings of sounds underwater and in air and of iceborne vibrations were obtained at Northstar Island an artificial gravel island in the Beaufort Sea near Prudhoe Bay (Alaska). The aim was to document the levels characteristics and range dependence of sounds and vibrations produced by drilling and oil production during the winter when the island was surrounded by shore-fast ice. Drilling produced the highest underwater broadband (10–10?000 Hz) levels (maximum=124 dB re: 1 ?Pa at 1 km) and mainly affected 700–1400 Hz frequencies. In contrast drilling did not increase broadband levels in air or ice relative to levels during other island activities. Production did not increase broadband levels for any of the sensors. In all media broadband levels decreased by ?20 dB/tenfold change in distance. Background levels underwater were reached by 9.4 km during drilling and 3–4 km without. In the air and ice background levels were reached 5–10 km and 2–10 km from Northstar respectively depending on the wind but irrespective of drilling. A comparison of the recorded sounds with harbor and ringed seal audiograms showed that Northstar sounds were probably audible to seals at least intermittently out to ?1.5 km in water and ?5 km in air.

Susanna B. Blackwell; Charles R. Greene Jr.; W. John Richardson

2004-01-01T23:59:59.000Z

465

The first Greenland ice core record of methanesulfonate and sulfate over a full glacial cycle  

E-Print Network [OSTI]

sulf•,te in the Dye 3 and Camp Century, Greenland ice cores,in both the Dye 3 and Camp Century deep ice cores [Herron

Hansson, Margareta E; Saltzman, Eric S

1993-01-01T23:59:59.000Z

466

Experimental Investigation of Energy Losses due to Icing of a Wind Turbine  

Science Journals Connector (OSTI)

Ice accretion and irregular shedding cause many potential problems during turbine operation. For example, icing causes large load imbalances; creates excessive turbine vibration; can change the natural frequen...

Xin Wang; Eric L. Bibeau…

2007-01-01T23:59:59.000Z

467

Investigation of how Insulation affects the pipe system in the soil for ice rinks.  

E-Print Network [OSTI]

?? In Sweden, ice rinks are one of the largest energy consumers in the public building sector, requiring, each ice rink, about 1050 MWh/year, from… (more)

Marco Estruc, Ignacio

2014-01-01T23:59:59.000Z

468

E-Print Network 3.0 - accurate path integration Sample Search...  

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

hardware but is able to create accurate path infor- mation... accurate path profile. Upon ... Source: Colorado at Boulder, University of - Computer Engineering Research...

469

A Path Forward for the Gulf Coast | Department of Energy  

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

A Path Forward for the Gulf Coast A Path Forward for the Gulf Coast A Path Forward for the Gulf Coast September 30, 2010 - 11:45am Addthis A Path Forward for the Gulf Coast Bill Valdez Bill Valdez Principal Deputy Director The Gulf Coast is a gate for commerce, producer of seafood, oil and natural gas, host to diverse ecosystems, home to millions and it's future is intertwined with the future of this Nation. Our country has made a promise to the people and small businesses of the Gulf Coast to restore their environment, economy and health, and continue a conversation with the fisherman, environmental workers, elected officials, health officials, scientists and Gulf residents on how to restore the Gulf. Those conversations and our promise to the Gulf are laid out in U.S. Navy Secretary Ray Mabus' report, which was released on Tuesday and presented

470

Effect of Uncertainties in Nuclear Reaction Rate on Nucleosynthesis Paths  

Science Journals Connector (OSTI)

......of Theoretical Physics, Vol. 123, No...Nuclear Reaction Rate on Nucleosynthesis...Nuclear Astro- physics Compilation of Reaction Rates (NACRE),2...synthesis paths pass through 20Ne or...18O reaction rate is larger than......

Kazuyuki Yamamoto; Kiyoshi Kato; Takahiro Wada; Masahisa Ohta

2010-06-01T23:59:59.000Z

471

Navigating Roadblocks on the Path to Advanced Biofuels Deployment  

Broader source: Energy.gov [DOE]

Breakout Session 2: Frontiers and Horizons Session 2–C: Navigating Roadblocks on the Path to Advanced Biofuels Deployment Arunas Chesonis, Chief Executive Officer and Chairman of the Board, Sweetwater Energy

472

Algorithms for an Unmanned Vehicle Path Planning Problem  

E-Print Network [OSTI]

Unmanned Vehicles (UVs) have been significantly utilized in military and civil applications over the last decade. Path-planning of UVs plays an important role in effectively using the available resources such as the UVs and sensors as efficiently...

Qin, Jianglei

2013-06-25T23:59:59.000Z

473

Recursive Path Orderings can be ContextSensitive  

E-Print Network [OSTI]

Recursive Path Orderings can be Context­Sensitive Cristina Borralleras 1 , Salvador Lucas 2. Rubio is also supported by the spanish DURSI group 2001SGR 00254. Salvador Lucas is partially supported

Lucas, Salvador

474

Data dependence path reduction with tunneling load instructions  

Science Journals Connector (OSTI)

The technique for reducing the length of the data dependence path is presented. This technique,...tunneling-load..., utilizes the register specifier buffer in order to hide the load latency, and thus reduces the ...

Toshinori Sato

1997-01-01T23:59:59.000Z

475

The Path to Low Carbon Passenger Vehicles | Department of Energy  

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

Carbon Passenger Vehicles The Path to Low Carbon Passenger Vehicles Technology to reduce GHG emissions by 40% available by 2025, and cost effective. deer10cackette.pdf More...

476

Multiphase flow and control of fluid path in microsystems  

E-Print Network [OSTI]

Miniaturized chemical-systems are expected to have advantages of handling, portability, cost, speed, reproducibility and safety. Control of fluid path in small channels between processes in a chemical/biological network ...

Jhunjhunwala, Manish

2005-01-01T23:59:59.000Z

477

Threat-aware Path Planning in Uncertain Urban Environments  

E-Print Network [OSTI]

This paper considers the path planning problem for an autonomous vehicle in an urban environment populated with static obstacles and moving vehicles with uncertain intents. We propose a novel threat assessment module, ...

Aoude, Georges

478

A Path to the Arrow-Debreu Competitive Market Equilibrium  

E-Print Network [OSTI]

Jul 28, 2006 ... ... solution is $O(n^4L)$ which is in line with the best complexity bound ... This path is derived from the weighted logarithmic utility and barrier ...

Yinyu Ye

2006-07-28T23:59:59.000Z

479

Open-path ozone detection by quantum-cascade laser  

Science Journals Connector (OSTI)

Open-path ozone measurements performed by mid-IR differential absorption spectroscopy are reported. Ozone spectrum was taken by fast repetitive sweeping of a quantum-cascade laser wavelength over a spectral featu...

M. Taslakov; V. Simeonov; M. Froidevaux; H. van den Bergh

2006-03-01T23:59:59.000Z

480

Identification of MHF Fracture Planes and Flow Paths- a Correlation...  

Open Energy Info (EERE)

Identification of MHF Fracture Planes and Flow Paths- a Correlation of Well Log Data with Patterns in Locations of Induced Seismicity Jump to: navigation, search OpenEI Reference...

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


481

Human-Automation Path Planning Optimization and Decision Support  

E-Print Network [OSTI]

Path planning is a problem encountered in multiple domains, including unmanned vehicle control, air traffic control, and future exploration missions to the Moon and Mars. Due to the voluminous and complex nature of the ...

Cummings, M.L.

2011-01-01T23:59:59.000Z

482

The paths and characteristics of real estate entrepreneurs  

E-Print Network [OSTI]

What paths have real estate entrepreneurs taken to establish their own firm? Also, what characteristics did they develop and utilize in the process? This thesis gives the unique opportunity to better understand the life ...

Kazmierski, Michael (Michael Anthony)

2008-01-01T23:59:59.000Z

483

Shortest Path Scheduler Use the solution to Traveling Salesman  

E-Print Network [OSTI]

: More beneficial to recharge node C, D before B. Spatial Laxity Filling (SLF): Recharge nodes near path due time. SLF: travelling cost 10% smaller than MRF. Reduce travelling cost by recharging nodes near

Wu, Jie

484

Thin magnetic crystals are path to ferromagnetic graphene | ornl...  

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

Functional Materials for Energy Thin magnetic crystals are path to ferromagnetic graphene January 23, 2015 The crystal structure of CrI3 includes hexagonal nets formed by Cr atoms...

485

Multispectral imaging contributions to global land ice measurements from space  

E-Print Network [OSTI]

, Germany j National Snow and Ice Data Center, University of Colorado, 449 UCB, Boulder, CO 80309, USA k development by GLIMS is geared toward mapping clean- ice and debris-covered glaciers; terrain classification are compatible with and expanded from those of the World Glacier Inventory (WGI). These technology efforts

Kääb, Andreas

486

IceCube Project Monthly Report September 2005  

E-Print Network [OSTI]

IceCube Project Monthly Report September 2005 Accomplishments All of the IceCube Digital Optical the long- term project goals of 90% first pass yield and 95% ultimate yield. The additional data handling at the Pole and one at McMurdo. The drilling procedures are nearing completion. A final review and sign

Saffman, Mark

487

Gravitational Separation of Gases and Isotopes in Polar Ice Caps  

Science Journals Connector (OSTI)

...reported that 02 trapped in 2000-year-old ice from Camp Century, Green-land, has an 180/160 enrichment given by...values for 02 in 6,100-and 20,000-year-old Camp Century ice (1), and noting that mean seawater was enriched...

H. Craig; Y. Horibe; T. Sowers

1988-12-23T23:59:59.000Z

488

Increase of Atmospheric Methane Recorded in Antarctic Ice Core  

Science Journals Connector (OSTI)

...obtained by Rasmussen and Khalil with ice samples from Camp Century (77011'N, 61009'W), Crete (71 07'N, 37 19'W...however, this difference is 130 years for ice from Camp Century, 200 years for Crete, and 240 years for Byrd Station...

B. STAUFFER; G. FISCHER; A. NEFTEL; H. OESCHGER

1985-09-27T23:59:59.000Z

489

Floating Glacial Ice Caps in the Arctic Ocean  

Science Journals Connector (OSTI)

...obtained from isotopic studies of the Camp Century ice core. The second is based...obtained from isotopic studies of the Camp Century ice core. The second is based...Arctic Ocean Arctic region benthonic Camp Century Cenozoic cores deep-sea evidence...

Wallace S. Broecker

1975-06-13T23:59:59.000Z

490

Proton ordering in tetragonal and monoclinic H2O ice  

E-Print Network [OSTI]

H2O ice remains one of the most enigmatic materials as its phase diagram reveals up to sixteen solid phases. While the crystal structure of these phases has been determined, the phase boundaries and mechanisms of formation of the proton-ordered phases remain unclear. From high precision measurements of the complex dielectric constant, we probe directly the degree of ordering of the protons in H2O tetragonal ice III and monoclinic ice V down to 80 K. A broadened first-order phase transition is found to occur near 202 K we attribute to a quenched disorder of the protons which causes a continuous disordering of the protons during cooling and metastable behavior. At 126 K the protons in ice III become fully ordered, and for the case of ice V becoming fully ordered at 113 K forming ice XIII. Two triple points are proposed to exist: one at 0.35 GPa and 126 K where ices III, IX and V coexist; and another at 0.35 GPa and 113 K where ices V, IX and XIII coexist. Our findings unravel the underlying mechanism driving th...

Yen, Fei; Berlie, Adam; Liu, Xiaodi; Goncharov, Alexander F

2015-01-01T23:59:59.000Z

491

Solvent Selection Use dry ice/isopropanol for cooling baths  

E-Print Network [OSTI]

Solvent Selection Use dry ice/isopropanol for cooling baths Reaches essentially the same temperature as dry ice/acetone (-77°C vs. -78°C), but the lower volatility of isopropanol minimizes vapor a closed-loop cooling system for condensers Closed-loop cooling systems eliminate wastewater and accidental

Chan, Hue Sun

492

ENERGY BASED ICE COLLISION FORCES Claude Daley1  

E-Print Network [OSTI]

ENERGY BASED ICE COLLISION FORCES Claude Daley1 1 Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1C 3X5 ABSTRACT Ice collision forces can be determined by energy considerations. A variety of interaction geometry cases are considered. The indentation energy functions for eight different

Daley, Claude

493

ENERGY BASED ICE COLLISION FORCES Claude Daley1  

E-Print Network [OSTI]

1 ENERGY BASED ICE COLLISION FORCES Claude Daley1 1 Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1C 3X5 ABSTRACT Ice collision forces can be determined by energy considerations. A variety of interaction geometry cases are considered. The indentation energy functions for eight different

Daley, Claude

494

POLAR SEA-ICE CLASSIFICATION USING ENHANCED RESOLUTION NSCAT DATA  

E-Print Network [OSTI]

POLAR SEA-ICE CLASSIFICATION USING ENHANCED RESOLUTION NSCAT DATA Q. P. Remund and D. G. Long of the scatterometer image reconstruction with filter (SIRF) algorithm. SIRF produces images of A and B where A is U is shown to have high correlation with the NSIDC SSM/I derived multiyear ice maps. INTRODUCTION Polar sea

Long, David G.

495

POLLEN DISPERSAL AND DEPOSITION ON THE QUELCCAYA ICE CAp, PERU  

E-Print Network [OSTI]

POLLEN DISPERSAL AND DEPOSITION ON THE QUELCCAYA ICE CAp, PERU Carl A. Reese and Kam-biu Liu: The relatively young science of tropical ice-core palynology has proven effective in the study of paleoenvironments by its ability to produce long-term and high- resolution paleoclimatic data. However, no studies

Liu, Kam-biu

496

Effectsof ice-crystal structure on halo formation: cirrus cloud  

E-Print Network [OSTI]

Effectsof ice-crystal structure on halo formation: cirrus cloud experimental and ray campaign, four 220halo-producing cirrus clouds were studied jointly from a ground- based polarization lidar of the aircraft, which collecteda total of 84slides byimpaction, preserving the ice crystals for later microscopic

Takano, Yoshihide

497

Has the ice man arrived? Tact on the Internet  

E-Print Network [OSTI]

Has the ice man arrived? Tact on the Internet Jonathan Grudin, UC Irvine and Microsoft Research. Eugene O'Neill's play The Ice Man Cometh outlines a series of calamities that occur when his characters the graded corrections via e- mail. The students produced a counter- proposal: After grading an exercise

Hearst, Marti

498

Sea Ice Enhancements to Polar WRF* Keith M. Hines1**  

E-Print Network [OSTI]

covering Europe and the Arctic Ocean demonstrate remote impacts of Arctic sea ice thickness on18 midSea Ice Enhancements to Polar WRF* Keith M. Hines1** , David H. Bromwich,1,2 , Lesheng Bai1 model (Polar WRF), a polar-optimized version of2 WRF, is developed by and available to the community

Howat, Ian M.

499

Optimization of Ice Thermal Storage Systems Design for HVAC Systems  

E-Print Network [OSTI]

Ice thermal storage is promising technology to reduce energy costs by shifting the cooling cost from on-peak to off-peak periods. The paper discusses the optimal design of ice thermal storage and its impact on energy consumption, demand, and total...

Nassif, N.; Hall, C.; Freelnad, D.

2013-01-01T23:59:59.000Z

500

IceCube Collaboration Contributions to ARENA 2008  

E-Print Network [OSTI]

Contributions of the IceCube Collaboration to the 3rd International Workshop on Acoustic and Radio EeV Neutrino detection Activities (ARENA 2008). The conference was held at Roma University "Sapienza," June 25-27, 2008, in Rome, Italy. This is an html index of the IceCube Collaboration contributions, with clickable links to the individual papers.

IceCube Collaboration

2008-11-15T23:59:59.000Z