Powered by Deep Web Technologies
Note: This page contains sample records for the topic "ice cube section" 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

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

2

Searching for Cosmic Accelerators via IceCube  

NLE Websites -- All DOE Office Websites (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,...

3

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

4

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

5

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

6

A new physics interpretation of the IceCube data  

E-Print Network (OSTI)

IceCube has recently observed 37 events of TeV-PeV energies. The angular distribution, with a strong preference for downgoing directions, the spectrum, and the small muon to shower ratio in the data can not be accommodated assuming standard interactions of atmospheric neutrinos. We obtain an excellent fit, however, if a diffuse flux of ultrahigh energy (cosmogenic) neutrinos experiences collisions where only a small fraction of the energy is transferred to the target nucleon. We show that consistent models of TeV gravity or other non-Wilsonian completions of the standard model provide cross sections with these precise features. An increased statistics could clearly distinguish our scenario from the one assumed by IceCube (a diffuse flux of astrophysical neutrinos with a E^{-2} spectrum) and establish the need for new physics in the interpretation of the data.

Jos Ignacio Illana; Manuel Masip; Davide Meloni

2014-10-13T23:59:59.000Z

7

IceCube: A Cubic Kilometer Radiation Detector  

SciTech Connect

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

8

Closing the window on strongly interacting dark matter with IceCube  

Science Journals Connector (OSTI)

We use the recent results on dark matter searches of the 22-string IceCube detector to probe the remaining allowed window for strongly interacting dark matter in the mass range 104IceCube detector from the annihilation of such particles captured in the Sun and compare it to the detected background. As a result, the remaining allowed region in the mass versus cross section parameter space is ruled out. We also show the expected sensitivity of the complete IceCube detector with 86 strings.

Ivone F. M. Albuquerque and Carlos Prez de los Heros

2010-03-08T23:59:59.000Z

9

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. Garca Canal; Haim Goldberg; Daniel Gomez Dumm; Francis Halzen

2006-12-29T23:59:59.000Z

10

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

11

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

12

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

13

Searching for Cosmic Accelerators via IceCube  

NLE Websites -- All DOE Office Websites (Extended Search)

Searching for Cosmic 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, lcyarris@lbl.gov, 510.486.5375 Bert.jpg This event display shows "Bert," one of two neutrino events discovered at IceCube whose energies exceeded one petaelectronvolt (PeV). The colors show when the light arrived, with reds being the earliest, succeeded by yellows, greens and blues. The size of the circle indicates the number of photons observed. (Courtesy of IceCube Lab) In our universe there are particle accelerators 40 million times more powerful than the Large Hadron Collider (LHC) at CERN. Scientists don't know what these cosmic accelerators are or where they are located, but new

14

The IceCube Collaboration:contributions to the 30 th International Cosmic Ray Conference (ICRC 2007),  

E-Print Network (OSTI)

X. Bai (for the IceCube Collaboration, J. Phys. : Conf. Ser.Gaisser for the IceCube Collaboration, these proceedings. [Achterberg et al. (IceCube Collaboration) Astropart. Phys.

Ackermann, M.; IceCube Collaboration

2008-01-01T23:59:59.000Z

15

IceCube: An Instrument for Neutrino Astronomy  

E-Print Network (OSTI)

Neutrino astronomy beyond the Sun was first imagined in the late 1950s; by the 1970s, it was realized that kilometer-scale neutrino detectors were required. The first such instrument, IceCube, is near completion and taking data. The IceCube project transforms a cubic kilometer of deep and ultra-transparent Antarctic ice into a particle detector. A total of 5,160 optical sensors are embedded into a gigaton of Antarctic ice to detect the Cherenkov light emitted by secondary particles produced when neutrinos interact with nuclei in the ice. Each optical sensor is a complete data acquisition system, including a phototube, digitization electronics, control and trigger systems and LEDs for calibration. The light patterns reveal the type (flavor) of neutrino interaction and the energy and direction of the neutrino, making neutrino astronomy possible. The scientific missions of IceCube include such varied tasks as the search for sources of cosmic rays, the observation of Galactic supernova explosions, the search for dark matter, and the study of the neutrinos themselves. These reach energies well beyond those produced with accelerator beams. The outline of this review is as follows: Neutrino Astronomy and Kilometer-Scale Detectors. High-Energy Neutrino Telescopes: Methodologies of Neutrino Detection. IceCube Hardware. High-Energy Neutrino Telescopes: Beyond Astronomy. Future Projects

Francis Halzen; Spencer R. Klein

2010-07-07T23:59:59.000Z

16

High Energy Neutrinos from the Cold: Status and Prospects of the IceCube Experiment  

SciTech Connect

The primary motivation for building neutrino telescopes is to open the road for neutrino astronomy, and to offer another observational window for the study of cosmic ray origins. Other physics topics, such as the search for WIMPs, can also be developed with neutrino telescope. As of March 2008, the IceCube detector, with half of its strings deployed, is the world largest neutrino telescope taking data to date and it will reach its completion in 2011. Data taken with the growing detector are being analyzed. The results of some of these works are summarized here. AMANDA has been successfully integrated into IceCube data acquisition system and continues to accumulate data. Results obtained using only AMANDA data taken between the years 2000 and 2006 are also presented. The future of IceCube and the extensions in both low and high energy regions will finally be discussed in the last section.

IceCube Collaboration; Portello-Roucelle, Cecile; Collaboration, IceCube

2008-02-29T23:59:59.000Z

17

IceCube Project Monthly Report August 2009 Accomplishments  

E-Print Network (OSTI)

IceCube Project Monthly Report ­ August 2009 Accomplishments · Driller and string installation officer was hired and received training and orientation to personnel, systems, and procedures. Cost and Schedule Performance ­ The project is 92.9% complete. Remaining contingency is $7.6 million. There has been

Saffman, Mark

18

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

19

IceCube Project Monthly Report September 2007  

E-Print Network (OSTI)

for glacial motion, and the other one using the IceCube Standard Candle that provides an absolute energy the planned filters (as designed by the individual physics groups). Two major shipments to Port Hueneme were. The remaining budget for spare hose segments does not fully satisfy the likely demand. The increased hose

Saffman, Mark

20

29April2011JohnLearnedatIceCubeDedication1 IceCube Dedication Symposium, Madison, Wisconsin  

E-Print Network (OSTI)

(Cosmic Rays) Sun Supernovae (star collapse) SN 1987A Bulk Earth (U/Th Radioactivity) Big Bang (hereLearnedatIceCubeDedication6 · No electric charge. · Little or no electric/magnetic dipole moment. · Essentially point interaction states (" oscillations"). · Three mass states explains all accepted data, but room for new things

Learned, John

Note: This page contains sample records for the topic "ice cube section" 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

Sensitivity of the IceCube neutrino detector to dark matter annihilating in dwarf galaxies  

Science Journals Connector (OSTI)

In this paper, we compare the relative sensitivities of gamma-ray and neutrino observations to the dark matter annihilation cross section in leptophilic models such as have been designed to explain PAMELA data. We investigate whether the high energy neutrino telescope IceCube will be competitive with current and upcoming searches by gamma-ray telescopes, such as the Atmospheric erenkov Telescopes (H.E.S.S., VERITAS, and MAGIC), or the Fermi Gamma-Ray Space Telescope, in detecting or constraining dark matter particles annihilating in dwarf spheroidal galaxies. We find that after 10 years of observation of the most promising nearby dwarfs, IceCube will have sensitivity comparable to the current sensitivity of gamma-ray telescopes only for very heavy (mX?7??TeV) or relatively light (mX?200??GeV) dark matter particles which annihilate primarily to ?+?-. If dark matter particles annihilate primarily to ?+?-, IceCube will have superior sensitivity only for dark matter particle masses below the 200GeV threshold of current Atmospheric erenkov Telescopes. If dark matter annihilations proceed directly to neutrino-antineutrino pairs a substantial fraction of the time, IceCube will be competitive with gamma-ray telescopes for a much wider range of dark matter masses.

Pearl Sandick; Douglas Spolyar; Matthew Buckley; Katherine Freese; Dan Hooper

2010-04-05T23:59:59.000Z

22

Estimating nonlinear QCD effects in ultrahigh energy neutrino events at IceCube  

Science Journals Connector (OSTI)

The number of ultrahigh energy events at IceCube is estimated, for the first time, taking into account nonlinear QCD effects in the neutrino-hadron cross section. We assume that the extragalactic neutrino flux is given by ??(E?)=?0E??2 and estimate the neutrino-hadron cross section using the dipole approach and a phenomenological model for the dipole-hadron cross section based on nonlinear QCD dynamics. We demonstrate that the nonlinear prediction is able to describe the current IceCube data and that the magnitude of the nonlinear effects is larger than 20% for visible energies of order of 2PeV and increases with the neutrino energy. Our main conclusion is that the nonlinear QCD effects are non-negligible and should be taken into account in the analysis of the number of ultrahigh energy events.

V.?P. Gonalves and D.?R. Gratieri

2014-09-11T23:59:59.000Z

23

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

24

Probing Planck scale physics with IceCube  

Science Journals Connector (OSTI)

Neutrino oscillations can be affected by decoherence induced e.g. by Planck scale suppressed interactions with the space-time foam predicted in some approaches to quantum gravity. We study the prospects for observing such effects at IceCube, using the likely flux of TeV antineutrinos from the Cygnus spiral arm. We formulate the statistical analysis for evaluating the sensitivity to quantum decoherence in the presence of the background from atmospheric neutrinos, as well as from plausible cosmic neutrino sources. We demonstrate that IceCube will improve the sensitivity to decoherence effects of O(E2/MPl) by 17 orders of magnitude over present limits and, moreover, that it can probe decoherence effects of O(E3/MPl2) which are well beyond the reach of other experiments.

Luis A. Anchordoqui; Haim Goldberg; M. C. Gonzalez-Garcia; Francis Halzen; Dan Hooper; Subir Sarkar; Thomas J. Weiler

2005-09-28T23:59:59.000Z

25

Neutrino events at IceCube and the Fermi bubbles  

Science Journals Connector (OSTI)

We discuss the possibility that the IceCube neutrino telescope might be observing the Fermi bubbles. If the bubbles discovered in gamma rays originate from accelerated protons, they should be strong emitters of high energy (?GeV) neutrinos. These neutrinos are detectable as showerlike or tracklike events at a Km3 neutrino observatory. For a primary cosmic ray flux with spectrum ?E?2.1 and cutoff energy at or above 10PeV, the Fermi bubble flux substantially exceeds the atmospheric background, and could account for up to ?45 of the 28 events detected above ?30??TeV at IceCube. Running the detector for ?57 more years should be sufficient to discover this flux at high significance. For a primary cosmic ray flux with steeper spectrum, and/or lower cutoff energy, longer running times will be required to overcome the background.

Cecilia Lunardini; Soebur Razzaque; Kristopher T. Theodoseau; Lili Yang

2014-07-21T23:59:59.000Z

26

Measurement of Atmospheric Neutrino Oscillations with IceCube  

Science Journals Connector (OSTI)

We present the first statistically significant detection of neutrino oscillations in the high-energy regime (>20??GeV) from an analysis of IceCube Neutrino Observatory data collected in 2010 and 2011. This measurement is made possible by the low-energy threshold of the DeepCore detector (?20??GeV) and benefits from the use of the IceCube detector as a veto against cosmic-ray-induced muon background. The oscillation signal was detected within a low-energy muon neutrino sample (20100GeV) extracted from data collected by DeepCore. A high-energy muon neutrino sample (100GeV10TeV) was extracted from IceCube data to constrain systematic uncertainties. The disappearance of low-energy upward-going muon neutrinos was observed, and the nonoscillation hypothesis is rejected with more than 5? significance. In a two-neutrino flavor formalism, our data are best described by the atmospheric neutrino oscillation parameters |?m322|=(2.3-0.5+0.6)10-3??eV2 and sin?2(2?23)>0.93, and maximum mixing is favored.

M. G. Aartsen et al. (IceCube Collaboration)

2013-08-19T23:59:59.000Z

27

Some possible sources of IceCube TeV-PeV neutrino events  

E-Print Network (OSTI)

The IceCube Collaboration has observed 37 neutrino events in the energy range $30\\, {\\text TeV}\\lesssim E_{\

Sarira Sahu; Luis Salvador Miranda

2014-08-21T23:59:59.000Z

28

Prospects for indirect detection of sneutrino dark matter with IceCube  

Science Journals Connector (OSTI)

We investigate the prospects for indirect detection of right-handed sneutrino dark matter at the IceCube neutrino telescope in a U(1)B-L extension of the minimal supersymmetric standard model. The capture and annihilation of sneutrinos inside the Sun reach equilibrium, and the flux of produced neutrinos is governed by the sneutrino-proton elastic scattering cross section, which has an upper bound of 810-9??pb from the Z? mass limits in the B-L model. Despite the absence of any spin-dependent contribution, the muon event rates predicted by this model can be detected at IceCube since sneutrinos mainly annihilate into leptonic final states by virtue of the fermion B-L charges. These subsequently decay to neutrinos with 100% efficiency. The Earth muon event rates are too small to be detected for the standard halo model irrespective of an enhanced sneutrino annihilation cross section that can explain the recent PAMELA data. For modified velocity distributions, the Earth muon events increase substantially and can be greater than the IceCube detection threshold of 12 events km-2?yr-1. However, this only leads to a mild increase of about 30% for the Sun muon events. The number of muon events from the Sun can be as large as roughly 100 events km-2?yr-1 for this model.

Rouzbeh Allahverdi; Sascha Bornhauser; Bhaskar Dutta; Katherine Richardson-McDaniel

2009-09-23T23:59:59.000Z

29

Search for relativistic magnetic monopoles with IceCube  

Science Journals Connector (OSTI)

We present the first results in the search for relativistic magnetic monopoles with the IceCube detector, a subsurface neutrino telescope located in the South Polar ice cap containing a volume of 1??km3. This analysis searches data taken on the partially completed detector during 2007 when roughly 0.2??km3 of ice was instrumented. The lack of candidate events leads to an upper limit on the flux of relativistic magnetic monopoles of ?90%C.L.?310-18??cm-2?sr-1?s-1 for ??0.8. This is a factor of 4 improvement over the previous best experimental flux limits up to a Lorentz boost ? below 107. This result is then interpreted for a wide range of mass and kinetic energy values.

R. Abbasi et al. (IceCube Collaboration)

2013-01-18T23:59:59.000Z

30

Black holes at the IceCube neutrino telescope  

Science Journals Connector (OSTI)

If the fundamental Planck scale is about a TeV and the cosmic neutrino flux is at the Waxman-Bahcall level, quantum black holes are created daily in the Antarctic ice cap. We reexamine the prospects for observing such black holes with the IceCube neutrino-detection experiment. To this end, we first revise the black hole production rate by incorporating the effects of inelasticty, i.e., the energy radiated in gravitational waves by the multipole moments of the incoming shock waves. After that we study in detail the process of Hawking evaporation accounting for the black holes large momentum in the lab system. We derive the energy spectrum of the Planckian cloud which is swept forward with a large, O(106), Lorentz factor. (It is noteworthy that the boosted thermal spectrum is also relevant for the study of near-extremal supersymmetric black holes, which could be copiously produced at the Large Hadron Collider.) In the semiclassical regime, we estimate the average energy of the boosted particles to be less than 20% the energy of the ? progenitor. Armed with such a constraint, we determine the discovery reach of IceCube by tagging on soft (relative to what one would expect from charged current standard model processes) muons escaping the electromagnetic shower bubble produced by the black holes light descendants. The statistically significant 5? excess extends up to a quantum gravity scale ?1.3??TeV.

Luis A. Anchordoqui; Matthew M. Glenz; Leonard Parker

2007-01-09T23:59:59.000Z

31

Dark matter at DeepCore and IceCube  

Science Journals Connector (OSTI)

With the augmentation of IceCube by DeepCore, the prospect for detecting dark matter annihilation in the Sun is much improved. To complement this experimental development, we provide a thorough template analysis of the particle physics issues that are necessary to precisely interpret the data. Our study is about nitty-gritty and is intended as a framework for detailed work on a variety of dark matter candidates. To accurately predict the source neutrino spectrum, we account for spin-correlations of the final state particles and the helicity-dependence of their decays, and absorption effects at production. We fully treat the propagation of neutrinos through the Sun, including neutrino oscillations, energy losses and tau regeneration. We simulate the survival probability of muons produced in the Earth by using the Muon MonteCarlo program, reproduce the published IceCube effective area, and update the parameters in the differential equation that approximates muon energy losses. To evaluate the zenith-angle dependent atmospheric background event rate, we track the Sun and determine the time it spends at each zenith-angle. Throughout, we employ neutralino dark matter as our example.

V. Barger; Y. Gao; D. Marfatia

2011-03-22T23:59:59.000Z

32

Neutrinos at IceCube from heavy decaying dark matter  

Science Journals Connector (OSTI)

A monochromatic line in the cosmic neutrino spectrum would be a smoking gun signature of dark matter. It is intriguing that the IceCube experiment has recently reported two PeV neutrino events with energies that may be equal up to experimental uncertainties, and which have a probability of being a background fluctuation estimated to be less than a percent. Here we explore prospects for these events to be the first indication of a monochromatic line signal from dark matter. While measurable annihilation signatures would seem to be impossible at such energies, we discuss the dark matter quantum numbers, effective operators, and lifetimes which could lead to an appropriate signal from dark matter decays. We will show that the set of possible decay operators is rather constrained and will focus on the following viable candidates which could explain the IceCube events: R-parity violating gravitinos, hidden sector gauge bosons, and singlet fermions in an extra dimension. In essentially all cases we find that a PeV neutrino line signal from dark matter would be accompanied by a potentially observable continuum spectrum of neutrinos rising towards lower energies.

Brian Feldstein; Alexander Kusenko; Shigeki Matsumoto; Tsutomu T. Yanagida

2013-07-02T23:59:59.000Z

33

The IceCube Collaboration: contributions to the 30th International Cosmic Ray Conference (ICRC 2007)  

E-Print Network (OSTI)

This paper bundles 40 contributions by the IceCube collaboration that were submitted to the 30th International Cosmic Ray Conference ICRC 2007. The articles cover studies on cosmic rays and atmospheric neutrinos, searches for non-localized, extraterrestrial electron, muon and tau neutrino signals, scans for steady and intermittent neutrino point sources, searches for dark matter candidates, magnetic monopoles and other exotic particles, improvements in analysis techniques, as well as future detector extensions. The IceCube observatory will be finalized in 2011 to form a cubic-kilometer ice-Cherenkov detector at the location of the geographic South Pole. At the present state of construction, IceCube consists of 52 paired IceTop surface tanks and 22 IceCube strings with a total of 1426 Digital Optical Modules deployed at depths up to 2350 m. The observatory also integrates the 19 string AMANDA subdetector, that was completed in 2000 and extends IceCube's reach to lower energies. Before the deployment of IceTop, cosmic air showers were registered with the 30 station SPASE-2 surface array. IceCube's low noise Digital Optical Modules are very reliable, show a uniform response and record waveforms of arriving photons that are resolvable with nanosecond precision over a large dynamic range. Data acquisition, reconstruction and simulation software are running in production mode and the analyses, profiting from the improved data quality and increased overall sensitivity, are well under way.

The IceCube Collaboration

2007-11-02T23:59:59.000Z

34

Constraints on neutrino-nucleon interactions at energies of 1EeV with the IceCube Neutrino Observatory  

Science Journals Connector (OSTI)

A search for extremely high energy cosmic neutrinos has been carried out with the IceCube Neutrino Observatory. The main signals in the search are neutrino-induced energetic charged leptons and their rate depends on the neutrino-nucleon cross section. The upper limit on the neutrino flux has implications for possible new physics beyond the standard model such as the extra space-time dimension scenarios which lead to a cross section much higher than the standard particle physics prediction. In this study we constrain the neutrino-nucleon cross section at energies beyond 109??GeV with the IceCube observation. The constraints are obtained as a function of the extraterrestrial neutrino flux in the relevant energy range, which accounts for the astrophysical uncertainty of neutrino production models.

Shigeru Yoshida

2010-11-22T23:59:59.000Z

35

Constraints on enhanced dark matter annihilation from IceCube results  

Science Journals Connector (OSTI)

Excesses on positron and electron fluxesmeasured by ATIC and the PAMELA and Fermi-LAT telescopescan be explained by dark matter annihilation in the Galaxy, however, it requires large boosts on the dark matter annihilation rate. There are many possible enhancement mechanisms such as the Sommerfeld effect or the existence of dark matter clumps in our halo. If enhancements on the dark matter annihilation cross section are taking place, the dark matter annihilation in the core of the Earth will be enhanced. Here we use recent results from the IceCube 40-string configuration to probe generic enhancement scenarios. We present results as a function of the dark matter-proton interaction cross section, ??p weighted by the branching fraction into neutrinos f?? as a function of a generic boost factor BF, which parametrizes the expected enhancement of the annihilation rate. We find that dark matter models that require annihilation enhancements of O(100) or more and that annihilate significantly into neutrinos are excluded as an explanation for these excesses. We also determine the boost range that can be probed by the full IceCube telescope.

Ivone F. M. Albuquerque; Leandro J. Beraldo e Silva; Carlos Prez de los Heros

2012-06-25T23:59:59.000Z

36

Search for muon neutrinos from Gamma-Ray Bursts with the IceCube neutrino telescope  

E-Print Network (OSTI)

2009, GCN: The Gamma ray bursts Coordinates Network, http://for muon neutrinos from Gamma-Ray Bursts with the IceCubeMereghetti, S. 2004, in Gamma-ray Bursts: 30 Years of

Abbasi, R.

2010-01-01T23:59:59.000Z

37

Physics reach of high-energy and high-statistics IceCube atmospheric neutrino data  

Science Journals Connector (OSTI)

This paper investigates the physics reach of the IceCube neutrino detector when it will have collected a data set of order one million atmospheric neutrinos with energies in the 0.1?104??TeV range. The paper consists of three parts. We first demonstrate how to simulate the detector performance using relatively simple analytic methods. Because of the high energies of the neutrinos, their oscillations, propagation in the Earth and regeneration due to ? decay must be treated in a coherent way. We set up the formalism to do this and discuss the implications. In a final section we apply the methods developed to evaluate the potential of IceCube to study new physics beyond neutrino oscillations. Not surprisingly, because of the increased energy and statistics over present experiments, existing bounds on violations of the equivalence principle and of Lorentz invariance can be improved by over 2 orders of magnitude. The methods developed can be readily applied to other nonconventional physics associated with neutrinos.

M. C. Gonzalez-Garcia; Francis Halzen; Michele Maltoni

2005-05-31T23:59:59.000Z

38

Neutrino mass hierarchy determination with IceCube-PINGU  

Science Journals Connector (OSTI)

We discuss the neutrino mass hierarchy determination with atmospheric neutrinos in Precision IceCube Next Generation Upgrade, based on a simulation with the GLoBES software including the full three flavor framework and parameter degeneracy, and we compare it to long-baseline experiment options. We demonstrate that the atmospheric mass hierarchy sensitivity depends on the achievable experiment properties, and we identify the main targets for optimization, whereas the impact of a large number of tested systematical errors turns out to be small. Depending on the values of ?23, ?, and the true hierarchy, a 90%C.L. to 3? discovery after three years of operation seems conceivable. We also emphasize the synergy with existing beam and reactor experiments, driven by NO?A, such as the complementary coverage of the parameter space. Finally, we point out that a low intensity neutrino beam with a relatively short decay pipe could be used to determine the mass hierarchy with a sensitivity comparable to the LBNE experiment irrespective of the directional resolution of the detector.

Walter Winter

2013-07-22T23:59:59.000Z

39

Search for Dark Matter Annihilations in the Sun with the 79-String IceCube Detector  

Science Journals Connector (OSTI)

We have performed a search for muon neutrinos from dark matter annihilation in the center of the Sun with the 79-string configuration of the IceCube neutrino telescope. For the first time, the DeepCore subarray is included in the analysis, lowering the energy threshold and extending the search to the austral summer. The 317days of data collected between June 2010 and May 2011 are consistent with the expected background from atmospheric muons and neutrinos. Upper limits are set on the dark matter annihilation rate, with conversions to limits on spin-dependent and spin-independent scattering cross sections of weakly interacting massive particles (WIMPs) on protons, for WIMP masses in the range 205000??GeV/c2. These are the most stringent spin-dependent WIMP-proton cross section limits to date above 35??GeV/c2 for most WIMP models.

M. G. Aartsen et al. (IceCube Collaboration)

2013-03-28T23:59:59.000Z

40

The Design and Performance of IceCube DeepCore  

E-Print Network (OSTI)

The IceCube neutrino observatory in operation at the South Pole, Antarctica, comprises three distinct components: a large buried array for ultrahigh energy neutrino detection, a surface air shower array, and a new buried component called DeepCore. DeepCore was designed to lower the IceCube neutrino energy threshold by over an order of magnitude, to energies as low as about 10 GeV. DeepCore is situated primarily 2100 m below the surface of the icecap at the South Pole, at the bottom center of the existing IceCube array, and began taking physics data in May 2010. Its location takes advantage of the exceptionally clear ice at those depths and allows it to use the surrounding IceCube detector as a highly efficient active veto against the principal background of downward-going muons produced in cosmic-ray air showers. DeepCore has a module density roughly five times higher than that of the standard IceCube array, and uses photomultiplier tubes with a new photocathode featuring a quantum efficiency about 35% higher...

,

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice cube section" 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

The IceCube Collaboration: contributions to the 29th International Cosmic Ray Conference (ICRC 2005), Pune, India, Aug. 2005  

E-Print Network (OSTI)

In this document we collect the 18 contributions of the IceCube Collaboration to the 29th International Cosmic Ray Conference (ICRC 2005), Pune, India, Aug. 2005

The IceCube Collaboration

2005-09-13T23:59:59.000Z

42

Observation of the cosmic-ray shadow of the Moon with IceCube  

Science Journals Connector (OSTI)

We report on the observation of a significant deficit of cosmic rays from the direction of the Moon with the IceCube detector. The study of this Moon shadow is used to characterize the angular resolution and absolute pointing capabilities of the detector. The detection is based on data taken in two periods before the completion of the detector: between April 2008 and May 2009, when IceCube operated in a partial configuration with 40 detector strings deployed in the South Pole ice, and between May 2009 and May 2010 when the detector operated with 59 strings. Using two independent analysis methods, the Moon shadow has been observed to high significance (>6?) in both detector configurations. The observed location of the shadow center is within 0.2 of its expected position when geomagnetic deflection effects are taken into account. This measurement validates the directional reconstruction capabilities of IceCube.

M.?G. Aartsen et al. (IceCube Collaboration)

2014-05-28T23:59:59.000Z

43

Pinpointing extragalactic neutrino sources in light of recent IceCube observations  

Science Journals Connector (OSTI)

The IceCube Collaboration has recently reported the observation of a flux of high-energy astrophysical neutrinos. The angular distribution of events is consistent with an isotropic arrival direction of neutrinos which is expected for an extragalactic origin. We estimate the prospects of detecting individual neutrino sources from a quasidiffuse superposition of many extragalactic sources at the level of the IceCube observation. Unlike previous analyses, we take into account ensemble variations of the source distribution as well as the event statistics of individual sources. We show that IceCube in its present configuration is sensitive to rare ?10?8??Mpc?3?yr?1 transient source classes within five years of operation via the observation of event clusters. Identification of time-independent sources is more challenging due to larger backgrounds. We estimate that during the same period IceCube is sensitive to sparse sources with densities of ?10?6??Mpc?3 via association of events with the closest 100 sources of an ensemble. We show that a next-generation neutrino observatory with 5 times the effective area of IceCube and otherwise similar detector performance would increase the sensitivity to source densities and rates by about 2 orders of magnitude.

Markus Ahlers and Francis Halzen

2014-08-11T23:59:59.000Z

44

Probing Dark Matter Self-Interaction in the Sun with IceCube-PINGU  

E-Print Network (OSTI)

We study the capture, annihilation and evaporation of dark matter (DM) inside the Sun. It has been shown that the DM self-interaction can increase the DM number inside the Sun. We demonstrate that this enhancement becomes more significant in the regime of small DM mass, given a fixed DM self-interaction cross section. This leads to the enhancement of neutrino flux from DM annihilation. On the other hand, for DM mass as low as a few GeVs, not only the DM-nuclei scatterings can cause the DM evaporation, DM self-interaction also provides non-negligible contributions to this effect. Consequently, the critical mass for DM evaporation (typically 3 $\\sim$ 4 GeV without the DM self-interaction) can be slightly increased. We discuss the prospect of detecting DM self-interaction in IceCube-PINGU using the annihilation channels $\\chi\\chi \\rightarrow \\tau^{+}\\tau^{-}, \

Chian-Shu Chen; Fei-Fan Lee; Guey-Lin Lin; Yen-Hsun Lin

2014-11-20T23:59:59.000Z

45

IceCube search for dark matter annihilation in nearby galaxies and galaxy clusters  

Science Journals Connector (OSTI)

We present the results of a first search for self-annihilating dark matter in nearby galaxies and galaxy clusters using a sample of high-energy neutrinos acquired in 339.8days of live time during 2009/10 with the IceCube neutrino observatory in its 59-string configuration. The targets of interest include the Virgo and Coma galaxy clusters, the Andromeda galaxy, and several dwarf galaxies. We obtain upper limits on the cross section as a function of the weakly interacting massive particle mass between 300GeV and 100TeV for the annihilation into bb, W+W-, ?+?-, ?+?-, and ??. A limit derived for the Virgo cluster, when assuming a large effect from subhalos, challenges the weakly interacting massive particle interpretation of a recently observed GeV positron excess in cosmic rays.

M. G. Aartsen et al. (IceCube Collaboration)

2013-12-06T23:59:59.000Z

46

Search for dark matter from the Galactic halo with the IceCube Neutrino Telescope  

Science Journals Connector (OSTI)

Self-annihilating or decaying dark matter in the Galactic halo might produce high energy neutrinos detectable with neutrino telescopes. We have conducted a search for such a signal using 276days of data from the IceCube 22-string configuration detector acquired during 2007 and 2008. The effect of halo model choice in the extracted limit is reduced by performing a search that considers the outer halo region and not the Galactic Center. We constrain any large-scale neutrino anisotropy and are able to set a limit on the dark matter self-annihilation cross section of ??Av??10-22??cm3?s-1 for weakly interacting massive particle masses above 1TeV, assuming a monochromatic neutrino line spectrum.

R. Abbasi et al. (IceCube Collaboration)

2011-07-29T23:59:59.000Z

47

First Evidence For Atmospheric Neutrino-Induced Cascades with the IceCube Detector  

E-Print Network (OSTI)

IceCube is an all-flavor, cubic kilometer neutrino telescope currently under construction in the deep glacial ice at the South Pole. Its embedded optical sensors detect Cherenkov light from charged particles produced in neutrino interactions in the ice. For several years IceCube has been detecting muon tracks from charged-current muon neutrino interactions. However, IceCube has yet to observe the electromagnetic or hadronic particle showers or "cascades" initiated by charged-current or neutral-current neutrino interactions. The first detection of such an event signature is expected to come from the known flux of atmospheric electron and muon neutrinos. A search for atmospheric neutrino-induced cascades was performed using 275.46 days of data from IceCube's 22-string configuration. Reconstruction and background rejection techniques were developed to reach, for the first time, a signal-to-background ratio ~1. Above a reconstructed energy of 5 TeV, 12 candidate events were observed in the full dataset. The signa...

D'Agostino, Michelangelo

2009-01-01T23:59:59.000Z

48

Letter of Intent: The Precision IceCube Next Generation Upgrade (PINGU)  

E-Print Network (OSTI)

The Precision IceCube Next Generation Upgrade (PINGU) is a proposed low-energy in-fill extension to the IceCube Observatory. With detection technology modeled closely on the successful IceCube example, PINGU will feature the world's largest effective volume for neutrinos at an energy threshold of a few GeV, enabling it to reach its chief goal of determining the neutrino mass hierarchy (NMH) quickly and at modest cost. PINGU will be able to distinguish between the normal and inverted NMH at $3\\sigma$ significance with an estimated 3.5 years of data. With its unprecedented statistical sample of low energy atmospheric neutrinos, PINGU will also have highly competitive sensitivity to $\

,

2014-01-01T23:59:59.000Z

49

Letter of Intent: The Precision IceCube Next Generation Upgrade (PINGU)  

E-Print Network (OSTI)

The Precision IceCube Next Generation Upgrade (PINGU) is a proposed low-energy in-fill extension to the IceCube Observatory. With detection technology modeled closely on the successful IceCube example, PINGU will feature the world's largest effective volume for neutrinos at an energy threshold of a few GeV, enabling it to reach its chief goal of determining the neutrino mass hierarchy (NMH) quickly and at modest cost. PINGU will be able to distinguish between the normal and inverted NMH at $3\\sigma$ significance with an estimated 3.5 years of data. With its unprecedented statistical sample of low energy atmospheric neutrinos, PINGU will also have highly competitive sensitivity to $\

The IceCube-PINGU Collaboration

2014-01-09T23:59:59.000Z

50

Prospects for identifying the sources of the Galactic cosmic rays with IceCube  

Science Journals Connector (OSTI)

We quantitatively address whether IceCube, a kilometer-scale neutrino detector under construction at the South Pole, can observe neutrinos pointing back at the accelerators of the Galactic cosmic rays. The photon flux from candidate sources identified by the Milagro detector in a survey of the TeV sky is consistent with the flux expected from a typical cosmic-ray generating supernova remnant interacting with the interstellar medium. We show here that IceCube can provide incontrovertible evidence of cosmic-ray acceleration in these sources by detecting neutrinos. We find that the signal is optimally identified by specializing to events with energies above 30?TeV where the atmospheric neutrino background is low. We conclude that evidence for a correlation between the Milagro and IceCube sky maps should be conclusive after several years.

Francis Halzen; Alexander Kappes; Aongus Murchadha

2008-09-04T23:59:59.000Z

51

Detection of atmospheric muon neutrinos with the IceCube 9-string detector  

Science Journals Connector (OSTI)

The IceCube neutrino detector is a cubic kilometer TeV to PeV neutrino detector under construction at the geographic South Pole. The dominant population of neutrinos detected in IceCube is due to meson decay in cosmic-ray air showers. These atmospheric neutrinos are relatively well understood and serve as a calibration and verification tool for the new detector. In 2006, the detector was approximately 10% completed, and we report on data acquired from the detector in this configuration. We observe an atmospheric neutrino signal consistent with expectations, demonstrating that the IceCube detector is capable of identifying neutrino events. In the first 137.4days of live time, 234 neutrino candidates were selected with an expectation of 21176.1(syst)14.5(stat) events from atmospheric neutrinos.

A. Achterberg et al. (IceCube Collaboration)

2007-07-19T23:59:59.000Z

52

IceCube sensitivity for neutrino flux from Fermi blazars in quiescent states  

Science Journals Connector (OSTI)

We investigate the IceCube detection potential of very high energy neutrinos from blazars, for different classes of hadronic models, taking into account the limits imposed on the neutrino flux by the recent Fermi telescope observations. Assuming the observed ?-ray emission is produced by the decay of neutral pions from proton-proton interactions, the measurement of the time-averaged spectral characteristics of blazars in the GeV energy band imposes upper limits on the time-averaged neutrino flux. Comparing these upper limits to the 5? discovery threshold of IceCube for different neutrino spectra and different source locations in the sky, we find that several BL Lacs with hard spectra in the GeV band are within the detection potential of IceCube. If the ?-ray emission is dominated by the neutral pion decay flux, none of the flat-spectrum radio quasars are detectable with IceCube. If the primary high energy proton spectrum is very hard and/or neutrinos are produced in proton photon, rather than proton-proton reactions, the upper limit on the neutrino flux imposed by the measured ?-ray spectra is relaxed and gamma-ray observations impose only lower bounds on the neutrino flux. We investigate whether these lower bounds guarantee the detection of blazars with very hard neutrino spectra (spectral index ???1), expected in the latter type model. We show that all the hadronic models of activity of blazars are falsifiable with IceCube. Furthermore, we show that models with ?-ray emission produced by the decay of neutral pions from proton-proton interactions can be readily distinguished from the models based on proton-gamma interactions and/or models predicting very hard high energy proton spectra via a study of the distribution of spectral indices of ?-ray spectra of sources detected with IceCube.

A. Neronov and M. Ribordy

2009-10-21T23:59:59.000Z

53

Reconstructing the supernova bounce time with neutrinos in IceCube  

Science Journals Connector (OSTI)

Generic model predictions for the early neutrino signal of a core-collapse supernova (SN) imply that IceCube can reconstruct the bounce to within about 3.5??ms at 95% C.L. (assumed SN distance 10kpc), relevant for coincidence with gravitational-wave detectors. The timing uncertainty scales approximately with the distance squared. The offset between true and reconstructed bounce time of up to several ms depends on the neutrino flavor oscillation scenario. Our work extends the recent study of Pagliaroli et al. [Phys. Rev. Lett. 103, 031102 (2009)] and demonstrates IceCubes superb timing capabilities for neutrinos from the next nearby SN.

Francis Halzen and Georg G. Raffelt

2009-10-15T23:59:59.000Z

54

Photohadronic origin of $\\gamma$-ray BL Lac emission: implications for IceCube neutrinos  

E-Print Network (OSTI)

The recent IceCube discovery of 0.1-1 PeV neutrinos of astrophysical origin opens up a new era for high-energy astrophysics. Although there are various astrophysical candidate sources, a firm association of the detected neutrinos with one (or more) of them is still lacking. A recent analysis of plausible astrophysical counterparts within the error circles of IceCube events showed that likely counterparts for nine of the IceCube neutrinos include mostly BL Lacs, among which Mrk 421. Motivated by this result and a previous independent analysis on the neutrino emission from Mrk 421, we test the BL Lac-neutrino connection in the context of a specific theoretical model for BL Lac emission. We model the spectral energy distribution (SED) of the BL Lacs selected as counterparts of the IceCube neutrinos using a one-zone leptohadronic model and mostly nearly simultaneous data. The neutrino flux for each BL Lac is self-consistently calculated, using photon and proton distributions specifically derived for every individ...

Petropoulou, Maria; Padovani, Paolo; Mastichiadis, Apostolos; Resconi, Elisa

2015-01-01T23:59:59.000Z

55

Testing the hadronuclear origin of PeV neutrinos observed with IceCube  

Science Journals Connector (OSTI)

We consider implications of the IceCube signal for hadronuclear (pp) scenarios of neutrino sources such as galaxy clusters/groups and star-forming galaxies. Since the observed neutrino flux is comparable to the diffuse ?-ray background flux obtained by Fermi, we place new, strong upper limits on the source spectral index, ??2.12.2. In addition, the new IceCube data imply that these sources contribute atleast 30%40% of the diffuse ?-ray background in the 100GeV range and even ?100% for softer spectra. Our results, which are insensitive to details of the pp source models, are one of the first strong examples of the multimessenger approach combining the measured neutrino and ?-ray fluxes. The pp origin of the IceCube signal can further be tested by constraining ? with sub-PeV neutrino observations, by unveiling the sub-TeV diffuse ?-ray background and by observing such pp sources with TeV ?-ray detectors. We also discuss specific pp source models with a multi-PeV neutrino break/cutoff, which are consistent with the current IceCube data.

Kohta Murase; Markus Ahlers; Brian C. Lacki

2013-12-03T23:59:59.000Z

56

Probing the Galactic origin of the IceCube excess with gamma rays  

Science Journals Connector (OSTI)

The IceCube Collaboration has recently reported evidence for a high-energy extraterrestrial neutrino flux. During two years of operation 28 events with energies between 30TeV and 1.2PeV were observed while only 10.6 events were expected from conventional atmospheric backgrounds. The hadronic interactions responsible for this IceCube excess will also produce a flux of high-energy ?-rays that can serve as a probe of source direction and distance. We show that existing TeV to PeV diffuse ?-ray limits support the interpretation that the IceCube excess is mostly of extragalactic origin. However, we point out that ?-ray surveys are biased in the Northern Hemisphere whereas the recent IceCube data tentatively show a weak preference for the Southern Sky. Possible sub-dominant contributions from Galactic neutrino sources like remnants of supernovae and hypernovae are marginally consistent with present ?-ray limits. This emphasizes the importance of future diffuse TeV to PeV ?-ray surveys in the Southern Hemisphere, particularly in the extended region around the Galactic center including the Fermi Bubbles.

Markus Ahlers and Kohta Murase

2014-07-11T23:59:59.000Z

57

Constraining the violation of the equivalence principle with IceCube atmospheric neutrino data  

Science Journals Connector (OSTI)

The recent high-statistics high-energy atmospheric neutrino data collected by IceCube open a new window to probe new physics scenarios that are suppressed in lower-energy neutrino experiments. In this paper we analyze the IceCube atmospheric neutrino data to constrain the violation of equivalence principle (VEP) in the framework of three neutrinos with nonuniversal gravitational couplings. In this scenario the effect of the VEP on neutrino oscillation probabilities can be parametrized by two parameters, ??21??2??1 and ??31??3??1, where ?is denote the coupling of neutrino mass eigenstates to the gravitational field. By analyzing the latest muon-tracks data sets of IceCube-40 and IceCube-79, besides providing the two-dimensional allowed regions in the (???21,???31) plane, we obtain the upper limits |???21|<9.110?27 (at 90% C.L.), which improves the previous limit by ?4 orders of magnitude, and |???31|?610?27 (at 90% C.L.), which improves the current limit by ?1 order of magnitude. Also we discuss in detail and analytically the effect of the VEP on neutrino oscillation probabilities.

A. Esmaili; D.?R. Gratieri; M.?M. Guzzo; P.?C. de Holanda; O.?L.?G. Peres; G.?A. Valdiviesso

2014-06-11T23:59:59.000Z

58

PeV neutrinos observed by IceCube from cores of active galactic nuclei  

Science Journals Connector (OSTI)

I show that the high energy neutrino flux predicted to arise from active galactic nuclei cores can explain the PeV neutrinos detected by IceCube without conflicting with the constraints from the observed extragalactic cosmic-ray and ?-ray backgrounds.

Floyd W. Stecker

2013-08-15T23:59:59.000Z

59

Limits on a Muon Flux from Neutralino Annihilations in the Sun with the IceCube 22-String Detector  

Science Journals Connector (OSTI)

A search for muon neutrinos from neutralino annihilations in the Sun has been performed with the IceCube 22-string neutrino detector using data collected in 104.3days of live time in 2007. No excess over the expected atmospheric background has been observed. Upper limits have been obtained on the annihilation rate of captured neutralinos in the Sun and converted to limits on the weakly interacting massive particle (WIMP) proton cross sections for WIMP masses in the range 2505000GeV. These results are the most stringent limits to date on neutralino annihilation in the Sun.

R. Abbasi et al. (IceCube Collaboration)

2009-05-21T23:59:59.000Z

60

Limits on a muon flux from neutralino annihilations in the Sun with the IceCube 22-string detector  

SciTech Connect

A search for muon neutrinos from neutralino annihilations in the Sun has been performed with the IceCube 22-string neutrino detector using data collected in 104.3 days of live-time in 2007. No excess over the expected atmospheric background has been observed. Upper limits have been obtained on the annihilation rate of captured neutralinos in the Sun and converted to limits on the WIMP-proton cross-sections for WIMP masses in the range 250-5000 GeV. These results are the most stringent limits to date on neutralino annihilation in the Sun.

IceCube Collaboration; Klein, Spencer

2009-04-28T23:59:59.000Z

Note: This page contains sample records for the topic "ice cube section" 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

The IceCube Collaboration:contributions to the 30 th International Cosmic Ray Conference (ICRC 2007),  

SciTech Connect

This paper bundles 40 contributions by the IceCube collaboration that were submitted to the 30th International Cosmic Ray Conference ICRC 2007. The articles cover studies on cosmic rays and atmospheric neutrinos, searches for non-localized, extraterrestrial {nu}{sub e}, {nu}{sub {mu}} and {nu}{sub {tau}} signals, scans for steady and intermittent neutrino point sources, searches for dark matter candidates, magnetic monopoles and other exotic particles, improvements in analysis techniques, as well as future detector extensions. The IceCube observatory will be finalized in 2011 to form a cubic-kilometer ice-Cherenkov detector at the location of the geographic South Pole. At the present state of construction, IceCube consists of 52 paired IceTop surface tanks and 22 IceCube strings with a total of 1426 Digital Optical Modules deployed at depths up to 2350 m. The observatory also integrates the 19 string AMANDA subdetector, that was completed in 2000 and extends IceCube's reach to lower energies. Before the deployment of IceTop, cosmic air showers were registered with the 30 station SPASE-2 surface array. IceCube's low noise Digital Optical Modules are very reliable, show a uniform response and record waveforms of arriving photons that are resolvable with nanosecond precision over a large dynamic range. Data acquisition, reconstruction and simulation software are running in production mode and the analyses, profiting from the improved data quality and increased overall sensitivity, are well under way.

IceCube Collaboration; Ackermann, M.

2007-11-02T23:59:59.000Z

62

Neutrinos in IceCube/KM3NeT as probes of dark matter substructures in galaxy clusters  

Science Journals Connector (OSTI)

Galaxy clusters are one of the most promising candidate sites for dark matter (DM) annihilation. We focus on DM (?) with mass in the range of 10GeV100TeV, annihilating through the channels ????+?-, ?????, ???tt, or ???????, and forecast the expected sensitivity to the annihilation cross section into these channels by observing galaxy clusters at IceCube/KM3NeT. Optimistically, the presence of DM substructures in galaxy clusters is predicted to enhance the signal by 23 orders of magnitude over the contribution from the smooth component of the DM distribution. Optimizing for the angular size of the region of interest for galaxy clusters, the sensitivity to the annihilation cross section, ??v?, of heavy DM with mass in the range of 300GeV100TeV will be O(10-24??cm3?s-1) for full IceCube/KM3NeT live time of 10years, which is about one order of magnitude better than the best limit that can be obtained by observing the MilkyWay halo. We find that neutrinos from cosmic ray interactions in the galaxy cluster, in addition to the atmospheric neutrinos, are a source of background. We show that significant improvement in the experimental sensitivity can be achieved for lower DM masses in the range of 10300GeV if neutrino-induced cascades can be reconstructed to ?5 accuracy, as may be possible in KM3NeT. We, therefore, propose that a low-energy extension KM3NeT-Core, similar to DeepCore in IceCube, be considered for an extended reach at low DM masses.

Basudeb Dasgupta and Ranjan Laha

2012-11-01T23:59:59.000Z

63

The IceCube data acquisition system: Signal capture, digitization,and timestamping  

SciTech Connect

IceCube is a km-scale neutrino observatory under construction at the South Pole with sensors both in the deep ice (InIce) and on the surface (IceTop). The sensors, called Digital Optical Modules (DOMs), detect, digitize and timestamp the signals from optical Cherenkov-radiation photons. The DOM Main Board (MB) data acquisition subsystem is connected to the central DAQ in the IceCube Laboratory (ICL) by a single twisted copper wire-pair and transmits packetized data on demand. Time calibration ismaintained throughout the array by regular transmission to the DOMs of precisely timed analog signals, synchronized to a central GPS-disciplined clock. The design goals and consequent features, functional capabilities, and initial performance of the DOM MB, and the operation of a combined array of DOMs as a system, are described here. Experience with the first InIce strings and the IceTop stations indicates that the system design and performance goals have been achieved.

The IceCube Collaboration; Matis, Howard

2009-03-02T23:59:59.000Z

64

Multiyear search for dark matter annihilations in the Sun with the AMANDA-II and IceCube detectors  

Science Journals Connector (OSTI)

A search for an excess of muon neutrinos from dark matter annihilations in the Sun has been performed with the AMANDA-II neutrino telescope using data collected in 812 days of live time between 2001 and 2006 and 149 days of live time collected with the AMANDA-II and the 40-string configuration of IceCube during 2008 and early 2009. No excess over the expected atmospheric neutrino background has been observed. We combine these results with the previously published IceCube limits obtained with data taken during 2007 to obtain a total live time of 1065 days. We provide an upper limit at 90% confidence level on the annihilation rate of captured neutralinos in the Sun, as well as the corresponding muon flux limit at the Earth, both as functions of the neutralino mass in the range 505000GeV. We also derive a limit on the neutralino-proton spin-dependent and spin-independent cross section. The limits presented here improve the previous results obtained by the collaboration between a factor of 2 and 5, as well as extending the neutralino masses probed down to 50GeV. The spin-dependent cross section limits are the most stringent so far for neutralino masses above 200GeV, and well below direct search results in the mass range from 50GeV to 5TeV.

R. Abbasi et al. (IceCube Collaboration)

2012-02-22T23:59:59.000Z

65

IceCube, DeepCore, PINGU and the indirect search for supersymmetric dark matter  

E-Print Network (OSTI)

The discovery of a particle that could be the lightest CP-even Higgs of the minimal supersymmetric extension of the Standard Model (MSSM) and the lack of evidence so far for supersymmetry at the LHC have many profound implications, including for the phenomenology of supersymmetric dark matter. In this study, we re-evaluate and give an update on the prospects for detecting supersymmetric neutralinos with neutrino telescopes, focussing in particular on the IceCube/DeepCore Telescope as well as on its proposed extension, PINGU. Searches for high-energy neutrinos from the Sun with IceCube probe MSSM neutralino dark matter models with the correct Higgs mass in a significant way. This is especially the case for neutralino dark matter models producing hard neutrino spectra, across a wide range of masses, while PINGU is anticipated to improve the detector sensitivity especially for models in the low neutralino mass range.

Paul Bergeron; Stefano Profumo

2013-12-16T23:59:59.000Z

66

First search for extraterrestrial neutrino-induced cascades with IceCube  

SciTech Connect

We report on the first search for extraterrestrial neutrino-induced cascades in IceCube.The analyzed data were collected in the year 2007 when 22 detector strings were installed and operated. We will discuss the analysis methods used to reconstruct cascades and to suppress backgrounds. Simulated neutrino signal events with a E-2 energy spectrum, which pass the background rejection criteria, are reconstructed with a resolution Delta(log E) ~;; 0.27 in the energy range from ~;; 20 TeV to a few PeV. We present the range of the diffuse flux of extra-terrestrial neutrinos in the cascade channel in IceCube within which we expect to be able to put a limit.

IceCube Collaboration; Kiryluk, Joanna

2009-05-22T23:59:59.000Z

67

Diffuse neutrinos from extragalactic supernova remnants: Dominating the 100 TeV IceCube flux  

E-Print Network (OSTI)

IceCube has measured a diffuse astrophysical flux of TeV-PeV neutrinos. The most plausible sources are unique high energy cosmic ray accelerators like hypernova remnants (HNRs) and remnants from gamma ray bursts in star-burst galaxies, which can produce primary cosmic rays with the required energies and abundance. In this case, however, ordinary supernova remnants (SNRs), which are far more abundant than HNRs, produce a comparable or larger neutrino flux in the ranges up to 100-150 TeV energies, implying a spectral break in the IceCube signal around these energies. The SNRs contribution in the diffuse flux up to these hundred TeV energies provides a natural baseline and then constrains the expected PeV flux.

Chakraborty, Sovan

2015-01-01T23:59:59.000Z

68

Is there evidence for sterile neutrinos in IceCube data?  

Science Journals Connector (OSTI)

Data from the Liquid Scintillator Neutrino Detector and Mini-Booster Neutrino experiments, and the revised expectations of the antineutrino flux from nuclear reactors suggest the existence of eV-mass sterile neutrinos. The 3+2 and 1+3+1 scenarios accommodate all relevant short-baseline neutrino data except for the low-energy Mini-Booster Neutrino Experiment anomaly. We analyze the angular distribution of upward going atmospheric neutrino events in the IceCube-40 data set for evidence of sterile neutrinos within these scenarios. Depending on how systematic uncertainties are handled, we find strong evidence for, or weak evidence against sterile neutrinos. We show that future IceCube data will definitively settle the issue.

V. Barger; Y. Gao; D. Marfatia

2012-01-18T23:59:59.000Z

69

Search for a Lorentz-violating sidereal signal with atmospheric neutrinos in IceCube  

Science Journals Connector (OSTI)

A search for sidereal modulation in the flux of atmospheric muon neutrinos in IceCube was performed. Such a signal could be an indication of Lorentz-violating physics. Neutrino oscillation models, derivable from extensions to the standard model, allow for neutrino oscillations that depend on the neutrinos direction of propagation. No such direction-dependent variation was found. A discrete Fourier transform method was used to constrain the Lorentz and CPT-violating coefficients in one of these models. Because of the unique high energy reach of IceCube, it was possible to improve constraints on certain Lorentz-violating oscillations by 3orders of magnitude with respect to limits set by other experiments.

R. Abbasi et al. (IceCube Collaboration)

2010-12-09T23:59:59.000Z

70

Extending the Search for Neutrino Point Sources with IceCube above the Horizon  

Science Journals Connector (OSTI)

Point source searches with the IceCube neutrino telescope have been restricted to one hemisphere, due to the exclusive selection of upward going events as a way of rejecting the atmospheric muon background. We show that the region above the horizon can be included by suppressing the background through energy-sensitive cuts. This improves the sensitivity above PeV energies, previously not accessible for declinations of more than a few degrees below the horizon due to the absorption of neutrinos in Earth. We present results based on data collected with 22 strings of IceCube, extending its field of view and energy reach for point source searches. No significant excess above the atmospheric background is observed in a sky scan and in tests of source candidates. Upper limits are reported, which for the first time cover point sources in the southern sky up to EeV energies.

R. Abbasi et al. (IceCube Collaboration)

2009-11-24T23:59:59.000Z

71

Searches for sterile neutrinos with IceCube DeepCore  

Science Journals Connector (OSTI)

We show that study of the atmospheric neutrinos in the 10100GeV energy range by DeepCore subarray of the IceCube Neutrino Observatory can substantially constrain the mixing of sterile neutrinos of mass ?1??eV with active neutrinos. In the scheme with one sterile neutrino we calculate ?? and ?? oscillation probabilities as well as zenith angle distributions of ??CC (charge current) events in different energy intervals in DeepCore. The distributions depend on the mass hierarchy of active neutrinos. Therefore, in principle, the hierarchy can be identified, if ?s exists. After a few years of exposure the DeepCore data will allow us to exclude the mixing of |U?4|2?0.02 indicated by the LSND/MiniBooNE results. Combination of the DeepCore and high-energy IceCube data will further improve sensitivity to ?s mixing parameters.

Soebur Razzaque and A. Yu. Smirnov

2012-05-18T23:59:59.000Z

72

Search for a Lorentz-violating sidereal signal with atmospheric neutrinos in IceCube  

SciTech Connect

A search for sidereal modulation in the flux of atmospheric muon neutrinos in IceCube was performed. Such a signal could be an indication of Lorentz-violating physics. Neutrino oscillationmodels, derivable from extensions to the Standard Model, allow for neutrino oscillations that depend on the neutrino's direction of propagation. No such direction-dependent variation was found. Adiscrete Fourier transform method was used to constrain the Lorentz and CPT-violating coefficients in one of these models. Due to the unique high energy reach of IceCube, it was possible to improveconstraints on certain Lorentz-violating oscillations by three orders of magnitude with respect to limits set by other experiments.

IceCube; etal, Abbasi, R,

2010-11-11T23:59:59.000Z

73

Search for Galactic PeV gamma rays with the IceCube Neutrino Observatory  

Science Journals Connector (OSTI)

Gamma-ray induced air showers are notable for their lack of muons, compared to hadronic showers. Hence, air shower arrays with large underground muon detectors can select a sample greatly enriched in photon showers by rejecting showers containing muons. IceCube is sensitive to muons with energies above ?500??GeV at the surface, which provides an efficient veto system for hadronic air showers with energies above 1PeV. One year of data from the 40-string IceCube configuration was used to perform a search for point sources and a Galactic diffuse signal. No sources were found, resulting in a 90%C.L. upper limit on the ratio of gamma rays to cosmic rays of 1.210-3 for the flux coming from the Galactic plane region (-80?l?-30; -10?b?5) in the energy range 1.26.0PeV. In the same energy range, point source fluxes with E-2 spectra have been excluded at a level of (E/TeV)2d?/dE?10-1210-11??cm-2?s-1?TeV-1 depending on source declination. The complete IceCube detector will have a better sensitivity (due to the larger detector size), improved reconstruction, and vetoing techniques. Preliminary data from the nearly final IceCube detector configuration have been used to estimate the 5-yr sensitivity of the full detector. It is found to be more than an order of magnitude better, allowing the search for PeV extensions of known TeV gamma-ray emitters.

M. G. Aartsen et al. (IceCube Collaboration)

2013-03-20T23:59:59.000Z

74

On the origin of IceCube's PeV neutrinos  

SciTech Connect

The IceCube collaboration has recently reported the observation of two events with energies in excess of 1 PeV. While an atmospheric origin of these events cannot be ruled out at this time, this pair of showers may potentially represent the first observation of high-energy astrophysical neutrinos. In this paper, we argue that if these events are neutrino-induced, then the neutrinos are very likely to have been produced via photo-meson interactions taking place in the same class of astrophysical objects that are responsible for the acceleration of the ? 10{sup 17} eV cosmic ray spectrum. Among the proposed sources of such cosmic rays, gamma-ray bursts stand out as particularly capable of generating PeV neutrinos at the level implied by IceCube's two events. In contrast, the radiation fields in typical active galactic nuclei models are likely dominated by lower energy (UV) photons, and thus feature higher energy thresholds for pion production, leading to neutrino spectra which peak at EeV rather than PeV energies (models with significant densities of x-ray emission, however, could evade this problem). Cosmogenic neutrinos generated from the propagation of ultra-high energy cosmic rays similarly peak at energies that are much higher than those of the events reported by IceCube.

Cholis, Ilias; Hooper, Dan, E-mail: cholis@fnal.gov, E-mail: dhooper@fnal.gov [Center for Particle Astrophysics, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States)

2013-06-01T23:59:59.000Z

75

TANAMI counterparts to IceCube high-energy neutrino events  

E-Print Network (OSTI)

Since the discovery of a neutrino flux in excess of the atmospheric background by the IceCube Collaboration, searches for the astrophysical sources have been ongoing. Due to the steeply falling background towards higher energies, the PeV events detected in three years of IceCube data are the most likely ones to be of extraterrestrial origin. Even excluding the PeV events detected so far, the neutrino flux is well above the atmospheric background, so it is likely that a number of sub-PeV events originate from the same astrophysical sources that produce the PeV events. We study the high-energy properties of AGN that are positionally coincident with the neutrino events from three years of IceCube data and show the results for event number 4. IC 4 is a event with a low angular error (7.1$^\\circ$) and a large deposited energy of 165 TeV. We use multiwavelength data, including Fermi/LAT and X-ray data, to construct broadband spectra and present parametrizations of the broadband spectral energy distributions with lo...

Krau, Felicia; Baxter, Claire; Kadler, Matthias; Mannheim, Karl; Ojha, Roopesh; Grfe, Christina; Mller, Cornelia; Wilms, Joern; Carpenter, Bryce; Schulz, Robert; TANAMI, on behalf of the

2015-01-01T23:59:59.000Z

76

ANTARES Constrains a Blazar Origin of Two IceCube PeV Neutrino Events  

E-Print Network (OSTI)

The source(s) of the neutrino excess reported by the IceCube Collaboration is unknown. The TANAMI Collaboration recently reported on the multiwavelength emission of six bright, variable blazars which are positionally coincident with two of the most energetic IceCube events. Such objects are prime candidates to be the source of the highest-energy cosmic rays, and thus of associated neutrino emission. We present an analysis of neutrino emission from the six blazars using observations with the ANTARES neutrino telescope. The standard methods of the ANTARES candidate list search are applied to six years of data to search for an excess of muons - and hence their neutrino progenitors - from the directions of the six blazars described by the TANAMI Collaboration, and which are possibly associated with two IceCube events. Monte Carlo simulations of the detector response to both signal and background particle fluxes are used to estimate the sensitivity of this analysis for different possible source neutrino spectra. A...

Adrin-Martnez, S; Andr, M; Anton, G; Ardid, M; Aubert, J -J; Baret, B; Barrios, J; Basa, S; Bertin, V; Biagi, S; Bogazzi, C; Bormuth, R; Bou-Cabo, M; Bouwhuis, M C; Bruijn, R; Brunner, J; Busto, J; Capone, A; Caramete, L; Carr, J; Chiarusi, T; Circella, M; Coniglione, R; Core, L; Costantini, H; Coyle, P; Creusot, A; De Rosa, G; Dekeyser, I; Deschamps, A; De Bonis, G; Distefano, C; Donzaud, C; Dornic, D; Dorosti, Q; Drouhin, D; Dumas, A; Eberl, T; Enzenhfer, A; Escoffier, S; Fehn, K; Felis, I; Fermani, P; Folger, F; Fusco, L A; Galat, S; Gay, P; Geielsder, S; Geyer, K; Giordano, V; Gleixner, A; Gmez-Gonzlez, J P; Graf, K; Guillard, G; van Haren, H; Heijboer, A J; Hello, Y; Hernndez-Rey, J J; Herold, B; Herrero, A; Hl, J; Hofestdt, J; Hugon, C; James, C W; de Jong, M; Kalekin, O; Katz, U; Kieling, D; Kooijman, P; Kouchner, A; Kulikovskiy, V; Lahmann, R; Lambard, E; Lambard, G; Lefvre, D; Leonora, E; Loehner, H; Loucatos, S; Mangano, S; Marcelin, M; Margiotta, A; Martnez-Mora, J A; Martini, S; Mathieu, A; Michael, T; Migliozzi, P; Neff, M; Nezri, E; Palioselitis, D; P?v?la?, G E; Pellegrino, C; Perrina, C; Piattelli, P; Popa, V; Pradier, T; Racca, C; Riccobene, G; Richter, R; Roensch, K; Rostovtsev, A; Saldaa, M; Samtleben, D F E; Snchez-Losa, A; Sanguineti, M; Sapienza, P; Schmid, J; Schnabel, J; Schulte, S; Schssler, F; Seitz, T; Sieger, C; Spies, A; Spurio, M; Steijger, J J M; Stolarczyk, Th; Taiuti, M; Tamburini, C; Tayalati, Y; Trovato, A; Vallage, B; Valle, C; Van Elewyck, V; Visser, E; Vivolo, D; Wagner, S; de Wolf, E; Yatkin, K; Yepes, H; Zornoza, J D; Ziga, J; :,; Krau, F; Kadler, M; Mannheim, K; Schulz, R; Trstedt, J; Wilms, J; Ojha, R; Ros, E; Baumgartner, W; Beuchert, T; Blanchard, J; Brkel, C; Carpenter, B; Edwards, P G; Glawion, D Eisenacher; Elssser, D; Fritsch, U; Gehrels, N; Grfe, C; Groberger, C; Hase, H; Horiuchi, S; Kappes, A; Kreikenbohm, A; Kreykenbohm, I; Langejahn, M; Leiter, K; Litzinger, E; Lovell, J E J; Mller, C; Phillips, C; Pltz, C; Quick, J; Steinbring, T; Stevens, J; Thompson, D J; Tzioumis, A K

2015-01-01T23:59:59.000Z

77

IceCube-Plus: An Ultra-High Energy Neutrino Telescope  

E-Print Network (OSTI)

While the first kilometer-scale neutrino telescope, IceCube, is under constructi on, alternative plans exist to build even larger detectors that will, however, b e limited by a much higher neutrino energy threshold of 10 PeV or higher rather than 10 to 100 GeV. These future projects detect radio and acoustic pulses as w ell as air showers initiated by ultra-high energy neutrinos. As an alternative, we here propose an expansion of IceCube, using the same strings, placed on a gri d with a spacing of order 500 m. Unlike other proposals, the expanded detector uses methods that are understood and calibrated on atmospheric neutrinos. Atmosp heric neutrinos represent the only background at the energies under consideratio n and is totally negligible. Also, the cost of such a detector is understood. We conclude that supplementing the 81 IceCube strings with a modest number of addi tional strings spaced at large distances can almost double the effective volume of the detector. Doubling the number of strings on a 800 m ...

Halzen, F; Halzen, Francis; Hooper, Dan

2004-01-01T23:59:59.000Z

78

IceCube-Plus: An Ultra-High Energy Neutrino Telescope  

E-Print Network (OSTI)

While the first kilometer-scale neutrino telescope, IceCube, is under construction, alternative plans exist to build even larger detectors that will, however, b e limited by a much higher neutrino energy threshold of 10 PeV or higher rather than 10 to 100 GeV. These future projects detect radio and acoustic pulses as w ell as air showers initiated by ultra-high energy neutrinos. As an alternative, we here propose an expansion of IceCube, using the same strings, placed on a gri d with a spacing of order 500 m. Unlike other proposals, the expanded detector uses methods that are understood and calibrated on atmospheric neutrinos. Atmosp heric neutrinos represent the only background at the energies under consideratio n and is totally negligible. Also, the cost of such a detector is understood. We conclude that supplementing the 81 IceCube strings with a modest number of addi tional strings spaced at large distances can almost double the effective volume of the detector. Doubling the number of strings on a 800 m grid can deliver a d etector that this a factor of 5 larger for horizontal muons at modest cost.

Francis Halzen; Dan Hooper

2003-12-22T23:59:59.000Z

79

IceCube PeV cascade events initiated by electron-antineutrinos at Glashow resonance  

Science Journals Connector (OSTI)

We propose an interpretation of the two neutrino initiated cascade events with PeV energies observed by IceCube: Ultrahigh energy cosmic ray protons (or Fe nuclei) scatter on cosmic microwave background photons through the Delta-resonance (the Berezinsky-Zatsepin process) yielding charged pions and neutrons. The neutron decays give electron-antineutrinos which undergo neutrino oscillations to populate all antineutrino flavors, but the electron-antineutrino flux remains dominant. At 6.3PeV electron-antineutrino energy their annihilation on electrons in the IceCube detector is enhanced by the Glashow resonance (the W-boson) whose decays can give the PeV showers observed in the IceCube detector. The two observed showers with ?1??PeV energies would need to be from W leptonic decays to electrons and taus. An order of magnitude higher event rate of showers at 6.3PeV is predicted from W to hadron decays. This interpretation can be tested in the near term. It has significant physics implications on the origin of the highest energy cosmic rays, since neutrino events and cosmic ray events likely share a common origin.

Vernon Barger; John Learned; Sandip Pakvasa

2013-02-22T23:59:59.000Z

80

Demystifying the PeV cascades in IceCube: Less (energy) is more (events)  

Science Journals Connector (OSTI)

The IceCube neutrino observatory has detected two cascade events with energies near 1PeV [A. Ishihara Proceedings of Neutrino 2012 Conference, http://neu2012.kek.jp/index.html; M. Aartsen etal. (IceCube Collaboration) Phys. Rev. Lett. 111, 021103 (2013)]. Without invoking new physics, we analyze the source of these neutrinos. We show that atmospheric conventional neutrinos and cosmogenic neutrinos (those produced in the propagation of ultra-high-energy cosmic rays) are strongly disfavored. For atmospheric prompt neutrinos or a diffuse background of neutrinos produced in astrophysical objects, the situation is less clear. We show that there is tension with observed data, but that the details depend on the least-known aspects of the IceCube analysis. Very likely, prompt neutrinos are disfavored and astrophysical neutrinos are plausible. We demonstrate that the fastest way to reveal the origin of the observed PeV neutrinos is to search for neutrino cascades in the range below 1PeV, for which dedicated analyses with high sensitivity have yet to appear, and where many more events could be found.

Ranjan Laha; John F. Beacom; Basudeb Dasgupta; Shunsaku Horiuchi; Kohta Murase

2013-08-21T23:59:59.000Z

Note: This page contains sample records for the topic "ice cube section" 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 IceCube data acquisition system for galactic core collapse supernova searches  

Science Journals Connector (OSTI)

The IceCube Neutrino Observatory was designed to detect highly energetic neutrinos. The detector was built as a lattice of 5160 photomultiplier tubes monitoring one cubic kilometer of clear Antarctic ice. Due to low photomultiplier dark noise rates in the cold and radio-pure ice IceCube is also able to detect bursts of O(10MeV) neutrinos expected to be emitted from core collapse supernovae. The detector will provide the worlds highest statistical precision for the lightcurves of galactic supernovae by observing an induced collective rise in all photomultiplier rates [1]. This paper presents the supernova data acquisition system the search algorithms for galactic supernovae as well as the recently implemented HitSpooling DAQ extension. HitSpooling will overcome the current limitation of transmitting photomultiplier rates in intervals of 1.6384 ms by storing all recorded time-stamped hits for supernova candidate triggers. From the corresponding event-based information the average neutrino energy can be estimated and the background induced by detector noise and atmospheric muons can be reduced.

2014-01-01T23:59:59.000Z

82

Search for neutrino-induced particle showers with IceCube-40  

Science Journals Connector (OSTI)

We report on the search for neutrino-induced particle showers, so-called cascades, in the IceCube-40 detector. The data for this search were collected between April 2008 and May 2009 when the first 40 IceCube strings were deployed and operational. Three complementary searches were performed, each optimized for different energy regimes. The analysis with the lowest energy threshold (2TeV) targeted atmospheric neutrinos. A total of 67 events were found, consistent with the expectation of 41 atmospheric muons and 30 atmospheric neutrino events. The two other analyses targeted a harder, astrophysical neutrino flux. The analysis with an intermediate threshold of 25TeV leads to the observation of 14 cascadelike events, again consistent with the prediction of 3.0 atmospheric neutrino and 7.7 atmospheric muon events. We hence set an upper limit of E2?lim?7.4610?8??GeV?sr?1?s?1?cm?2 (90%C.L.) on the diffuse flux from astrophysical neutrinos of all neutrino flavors, applicable to the energy range 25TeV to 5PeV, assuming an E??2 spectrum and a neutrino flavor ratio of 1?1?1 at the Earth. The third analysis utilized a larger and optimized sample of atmospheric muon background simulation, leading to a higher energy threshold of 100TeV. Three events were found over a background prediction of 0.04 atmospheric muon events and 0.21 events from the flux of conventional and prompt atmospheric neutrinos. Including systematic errors this corresponds to a 2.7? excess with respect to the background-only hypothesis. Our observation of neutrino event candidates above 100TeV complements IceCubes recently observed evidence for high-energy astrophysical neutrinos.

M.?G. Aartsen et al. (IceCube Collaboration)

2014-05-01T23:59:59.000Z

83

TANAMI Blazars in the IceCube PeV Neutrino Fields  

E-Print Network (OSTI)

The IceCube Collaboration has announced the discovery of a neutrino flux in excess of the atmospheric background. Due to the steeply falling atmospheric background spectrum, events at PeV energies are most likely of extraterrestrial origin. We present the multiwavelength properties of the six radio brightest blazars positionally coincident with these events using contemporaneous data of the TANAMI blazar sample, including high-resolution images and spectral energy distributions. Assuming the X-ray to {\\gamma}-ray emission originates in the photoproduction of pions by accelerated protons, the integrated predicted neutrino luminosity of these sources is large enough to explain the two detected PeV events.

F. Krau; M. Kadler; K. Mannheim; R. Schulz; J Trstedt; J. Wilms; R. Ojha; E. Ros; G. Anton; W. Baumgartner; T. Beuchert; J. Blanchard; C. Brkel; B. Carpenter; T. Eberl; P. G. Edwards; D. Eisenacher; D. Elssser; K. Fehn; U. Fritsch; N. Gehrels; C. Grfe; C. Groberger; H. Hase; S. Horiuchi; C. James; A. Kappes; U. Katz; A. Kreikenbohm; I. Kreykenbohm; M. Langejahn; K. Leiter; E. Litzinger; J. E. J. Lovell; C. Mller; C. Phillips; C. Pltz; J. Quick; T. Steinbring; J. Stevens; D. J. Thompson; A. K. Tzioumis

2014-06-03T23:59:59.000Z

84

Search for Prompt Neutrino Emission from Gamma-Ray Bursts with IceCube  

E-Print Network (OSTI)

We present constraints derived from a search of four years of IceCube data for a prompt neutrino flux from gamma-ray bursts (GRBs). A single low-significance neutrino was found in coincidence with one of the 506 observed bursts, consistent with the expectation from atmospheric backgrounds. Although GRBs have been proposed as candidate sources for ultra-high energy cosmic rays, our limits on the neutrino flux disfavor much of the parameter space for the latest models. We also find that no more than $\\sim1\\%$ of the recently observed astrophysical neutrino flux consists of prompt emission from GRBs that are potentially observable by existing satellites.

Aartsen, M G; Adams, J; Aguilar, J A; Ahlers, M; Ahrens, M; Altmann, D; Anderson, T; Arguelles, C; Arlen, T C; Auffenberg, J; Bai, X; Barwick, S W; Baum, V; Bay, R; Beatty, J J; Tjus, J Becker; Becker, K -H; BenZvi, S; Berghaus, P; Berley, D; Bernardini, E; Bernhard, A; Besson, D Z; Binder, G; Bindig, D; Bissok, M; Blaufuss, E; Blumenthal, J; Boersma, D J; Bohm, C; Bos, F; Bose, D; Bser, S; Botner, O; Brayeur, L; Bretz, H -P; Brown, A M; Buzinsky, N; Casey, J; Casier, M; Cheung, E; Chirkin, D; Christov, A; Christy, B; Clark, K; Classen, L; Clevermann, F; Coenders, S; Cowen, D F; Silva, A H Cruz; Daughhetee, J; Davis, J C; Day, M; de Andr, J P A M; De Clercq, C; De Ridder, S; Desiati, P; de Vries, K D; de With, M; DeYoung, T; Daz-Vlez, J C; Dunkman, M; Eagan, R; Eberhardt, B; Ehrhardt, T; Eichmann, B; Eisch, J; Euler, S; Evenson, P A; Fadiran, O; Fazely, A R; Fedynitch, A; Feintzeig, J; Felde, J; Filimonov, K; Finley, C; Fischer-Wasels, T; Flis, S; Frantzen, K; Fuchs, T; Gaisser, T K; Gaior, R; Gallagher, J; Gerhardt, L; Gier, D; Gladstone, L; Glsenkamp, T; Goldschmidt, A; Golup, G; Gonzalez, J G; Goodman, J A; Gra, D; Grant, D; Gretskov, P; Groh, J C; Gro, A; Ha, C; Haack, C; Ismail, A Haj; Hallen, P; Hallgren, A; Halzen, F; Hanson, K; Hebecker, D; Heereman, D; Heinen, D; Helbing, K; Hellauer, R; Hellwig, D; Hickford, S; Hill, G C; Hoffman, K D; Hoffmann, R; Homeier, A; Hoshina, K; Huang, F; Huelsnitz, W; Hulth, P O; Hultqvist, K; Ishihara, A; Jacobi, E; Jacobsen, J; Japaridze, G S; Jero, K; Jlelati, O; Jurkovic, M; Kaminsky, B; Kappes, A; Karg, T; Karle, A; Kauer, M; Keivani, A; Kelley, J L; Kheirandish, A; Kiryluk, J; Kls, J; Klein, S R; Khne, J -H; Kohnen, G; Kolanoski, H; Koob, A; Kpke, L; Kopper, C; Kopper, S; Koskinen, D J; Kowalski, M; Kriesten, A; Krings, K; Kroll, G; Kroll, M; Kunnen, J; Kurahashi, N; Kuwabara, T; Labare, M; Lanfranchi, J L; Larsen, D T; Larson, M J; Lesiak-Bzdak, M; Leuermann, M; Lnemann, J; Madsen, J; Maggi, G; Maruyama, R; Mase, K; Matis, H S; Maunu, R; McNally, F; Meagher, K; Medici, M; Meli, A; Meures, T; Miarecki, S; Middell, E; Middlemas, E; Milke, N; Miller, J; Mohrmann, L; Montaruli, T; Morse, R; Nahnhauer, R; Naumann, U; Niederhausen, H; Nowicki, S C; Nygren, D R; Obertacke, A; Odrowski, S; Olivas, A; Omairat, A; O'Murchadha, A; Palczewski, T; Paul, L; Penek, ; Pepper, J A; Heros, C Prez de los; Pfendner, C; Pieloth, D; Pinat, E; Posselt, J; Price, P B; Przybylski, G T; Ptz, J; Quinnan, M; Rdel, L; Rameez, M; Rawlins, K; Redl, P; Rees, I; Reimann, R; Relich, M; Resconi, E; Rhode, W; Richman, M; Riedel, B; Robertson, S; Rodrigues, J P; Rongen, M; Rott, C; Ruhe, T; Ruzybayev, B; Ryckbosch, D; Saba, S M; Sander, H -G; Sandroos, J; Santander, M; Sarkar, S; Schatto, K; Scheriau, F; Schmidt, T; Schmitz, M; Schoenen, S; Schneberg, S; Schnwald, A; Schukraft, A; Schulte, L; Schulz, O; Seckel, D; Sestayo, Y; Seunarine, S; Shanidze, R; Smith, M W E; Soldin, D; Spiczak, G M; Spiering, C; Stamatikos, M; Stanev, T; Stanisha, N A; Stasik, A; Stezelberger, T; Stokstad, R G; Stl, A; Strahler, E A; Strm, R; Strotjohann, N L; Sullivan, G W; Taavola, H; Taboada, I; Tamburro, A; Tepe, A; Ter-Antonyan, S; Terliuk, A; Tei?, G; Tilav, S; Toale, P A; Tobin, M N; Tosi, D; Tselengidou, M; Unger, E; Usner, M; Vallecorsa, S; van Eijndhoven, N; Vandenbroucke, J; van Santen, J; Vanheule, S; Vehring, M; Voge, M; Vraeghe, M; Walck, C; Wallraff, M; Weaver, Ch; Wellons, M; Wendt, C; Westerhoff, S; Whelan, B J; Whitehorn, N; Wichary, C; Wiebe, K; Wiebusch, C H; Williams, D R; Wissing, H; Wolf, M; Wood, T R; Woschnagg, K; Xu, D L; Xu, X W; Xu, Y; Yanez, J P; Yodh, G; Yoshida, S; Zarzhitsky, P; Ziemann, J; Zoll, M

2014-01-01T23:59:59.000Z

85

Probing neutrino oscillations from supernovae shock waves via the IceCube detector  

Science Journals Connector (OSTI)

The time dependent neutrino oscillation signals due to the passage of a shock wave through the supernovae are analyzed for the case of three active neutrinos and also for the case that there are two additional sterile neutrinos. It is shown that, even without flavor identification and energy measurement, detailed information about the masses and mixing angles of the neutrinos may be obtained with a detector with excellent time resolution such as IceCube. Such a signal would also give important information about the nature of the shock wave within the supernovae.

Sandhya Choubey; N. P. Harries; G. G. Ross

2006-09-25T23:59:59.000Z

86

First search for extremely high energy cosmogenic neutrinos with the IceCube Neutrino Observatory  

Science Journals Connector (OSTI)

We report on the results of the search for extremely-high energy neutrinos with energies above 107??GeV obtained with the partially (?30%) constructed IceCube in 2007. From the absence of signal events in the sample of 242.1 days of effective live time, we derive a 90% C.L. model independent differential upper limit based on the number of signal events per energy decade at E2??e+??+???1.410-6??GeV?cm-2?sec?-1?sr-1 for neutrinos in the energy range from 3107 to 3109??GeV.

R. Abbasi et al. (IceCube Collaboration)

2010-10-07T23:59:59.000Z

87

Neutron \\beta-decay as the origin of IceCube's PeV (anti)neutrinos  

E-Print Network (OSTI)

Motivated by the indications of a possible deficit of muon tracks in the first three-year equivalent dataset of IceCube we investigate the possibility that the astrophysical (anti)neutrino flux (in the PeV energy range) could originate from \\beta-decay of relativistic neutrons. We show that to accommodate IceCube observations it is necessary that only \\sim 10% of the emitted cosmic rays in the energy decade 10^{8.5} \\alt E_{CR}/GeV \\alt 10^{9.5}$, yielding antineutrinos on Earth (10^{5.5} \\alt E_{\\bar \

Anchordoqui, Luis A

2014-01-01T23:59:59.000Z

88

Limits on Neutrino Emission from Gamma-Ray Bursts with the 40 String IceCube Detector  

E-Print Network (OSTI)

IceCube has become the first neutrino telescope with a sensitivity below the TeV neutrino flux predicted from gamma-ray bursts if GRBs are responsible for the observed cosmic-ray flux above $10^{18}$ eV. Two separate analyses using the half-complete IceCube detector, one a dedicated search for neutrinos from $p \\gamma$-interactions in the prompt phase of the GRB fireball, and the other a generic search for any neutrino emission from these sources over a wide range of energies and emission times, produced no evidence for neutrino emission, excluding prevailing models at 90% confidence.

IceCube Collaboration; R. Abbasi; Y. Abdou; T. Abu-Zayyad; J. Adams; J. A. Aguilar; M. Ahlers; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; R. Bay; J. L. Bazo Alba; K. Beattie; J. J. Beatty; S. Bechet; J. K. Becker; K. -H. Becker; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; D. Bose; S. Bser; O. Botner; J. Braun; A. M. Brown; S. Buitink; M. Carson; D. Chirkin; B. Christy; J. Clem; F. Clevermann; S. Cohen; C. Colnard; D. F. Cowen; M. V. D'Agostino; M. Danninger; J. Daughhetee; J. C. Davis; C. De Clercq; L. Demirrs; O. Depaepe; F. Descamps; P. Desiati; G. de Vries-Uiterweerd; T. DeYoung; J. C. Daz-Vlez; M. Dierckxsens; J. Dreyer; J. P. Dumm; R. Ehrlich; J. Eisch; R. W. Ellsworth; O. Engdegrd; S. Euler; P. A. Evenson; O. Fadiran; A. R. Fazely; A. Fedynitch; T. Feusels; K. Filimonov; C. Finley; T. Fischer-Wasels; M. M. Foerster; B. D. Fox; A. Franckowiak; R. Franke; T. K. Gaisser; J. Gallagher; M. Geisler; L. Gerhardt; L. Gladstone; T. Glsenkamp; A. Goldschmidt; J. A. Goodman; D. Grant; T. Griesel; A. Gro; S. Grullon; M. Gurtner; C. Ha; A. Hallgren; F. Halzen; K. Han; K. Hanson; D. Heinen; K. Helbing; P. Herquet; S. Hickford; G. C. Hill; K. D. Hoffman; A. Homeier; K. Hoshina; D. Hubert; W. Huelsnitz; J. -P. Hl; P. O. Hulth; K. Hultqvist; S. Hussain; A. Ishihara; J. Jacobsen; G. S. Japaridze; H. Johansson; J. M. Joseph; K. -H. Kampert; A. Kappes; T. Karg; A. Karle; J. L. Kelley; N. Kemming; P. Kenny; J. Kiryluk; F. Kislat; S. R. Klein; J. -H. Khne; G. Kohnen; H. Kolanoski; L. Kpke; S. Kopper; D. J. Koskinen; M. Kowalski; T. Kowarik; M. Krasberg; T. Krings; G. Kroll; K. Kuehn; T. Kuwabara; M. Labare; S. Lafebre; K. Laihem; H. Landsman; M. J. Larson; R. Lauer; R. Lehmann; J. Lnemann; J. Madsen; P. Majumdar; A. Marotta; R. Maruyama; K. Mase; H. S. Matis; K. Meagher; M. Merck; P. Mszros; T. Meures; E. Middell; N. Milke; J. Miller; T. Montaruli; R. Morse; S. M. Movit; R. Nahnhauer; J. W. Nam; U. Naumann; P. Nieen; D. R. Nygren; S. Odrowski; A. Olivas; M. Olivo; A. O'Murchadha; M. Ono; S. Panknin; L. Paul; C. Prez de los Heros; J. Petrovic; A. Piegsa; D. Pieloth; R. Porrata; J. Posselt; P. B. Price; M. Prikockis; G. T. Przybylski; K. Rawlins; P. Redl; E. Resconi; W. Rhode; M. Ribordy; A. Rizzo; J. P. Rodrigues; P. Roth; F. Rothmaier; C. Rott; T. Ruhe; D. Rutledge; B. Ruzybayev; D. Ryckbosch; H. -G. Sander; M. Santander; S. Sarkar; K. Schatto; T. Schmidt; A. Schoenwald; A. Schukraft; A. Schultes; O. Schulz; M. Schunck; D. Seckel; B. Semburg; S. H. Seo; Y. Sestayo; S. Seunarine; A. Silvestri; A. Slipak; G. M. Spiczak; C. Spiering; M. Stamatikos; T. Stanev; G. Stephens; T. Stezelberger; R. G. Stokstad; S. Stoyanov; E. A. Strahler; T. Straszheim; G. W. Sullivan; Q. Swillens; H. Taavola; I. Taboada; A. Tamburro; O. Tarasova; A. Tepe; S. Ter-Antonyan; S. Tilav; P. A. Toale; S. Toscano; D. Tosi; D. Tur?an; N. van Eijndhoven; J. Vandenbroucke; A. Van Overloop; J. van Santen; M. Vehring; M. Voge; B. Voigt; C. Walck; T. Waldenmaier; M. Wallraff; M. Walter; C. Weaver; C. Wendt; S. Westerhoff; N. Whitehorn; K. Wiebe; C. H. Wiebusch; D. R. Williams; R. Wischnewski; H. Wissing; M. Wolf; K. Woschnagg; C. Xu; X. W. Xu; G. Yodh; S. Yoshida; P. Zarzhitsky

2011-03-09T23:59:59.000Z

89

Limits on Neutrino Emission from Gamma-Ray Bursts with the 40 String IceCube Detector  

Science Journals Connector (OSTI)

IceCube has become the first neutrino telescope with a sensitivity below the TeV neutrino flux predicted from gamma-ray bursts if gamma-ray bursts are responsible for the observed cosmic-ray flux above 1018??eV. Two separate analyses using the half-complete IceCube detector, one a dedicated search for neutrinos from p? interactions in the prompt phase of the gamma-ray burst fireball and the other a generic search for any neutrino emission from these sources over a wide range of energies and emission times, produced no evidence for neutrino emission, excluding prevailing models at 90% confidence.

R. Abbasi et al. (IceCube Collaboration)

2011-04-07T23:59:59.000Z

90

Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data  

Science Journals Connector (OSTI)

A search for high-energy neutrinos interacting within the IceCube detector between 2010 and 2012 provided the first evidence for a high-energy neutrino flux of extraterrestrial origin. Results from an analysis using the same methods with a third year (20122013) of data from the complete IceCube detector are consistent with the previously reported astrophysical flux in the 100TeVPeV range at the level of 10?8??GeV?cm?2?s?1?sr?1 per flavor and reject a purely atmospheric explanation for the combined three-year data at 5.7?. The data are consistent with expectations for equal fluxes of all three neutrino flavors and with isotropic arrival directions, suggesting either numerous or spatially extended sources. The three-year data set, with a live time of 988 days, contains a total of 37 neutrino candidate events with deposited energies ranging from 30 to 2000TeV. The 2000-TeV event is the highest-energy neutrino interaction ever observed.

M.?G. Aartsen et al. (IceCube Collaboration)

2014-09-02T23:59:59.000Z

91

First Observation of PeV-Energy Neutrinos with IceCube  

Science Journals Connector (OSTI)

We report on the observation of two neutrino-induced events which have an estimated deposited energy in the IceCube detector of 1.040.16 and 1.140.17??PeV, respectively, the highest neutrino energies observed so far. These events are consistent with fully contained particle showers induced by neutral-current ?e,?,? (?e,?,?) or charged-current ?e (?e) interactions within the IceCube detector. The events were discovered in a search for ultrahigh energy neutrinos using data corresponding to 615.9 days effective live time. The expected number of atmospheric background is 0.0820.004(stat)-0.057+0.041(syst). The probability of observing two or more candidate events under the atmospheric background-only hypothesis is 2.910-3 (2.8?) taking into account the uncertainty on the expected number of background events. These two events could be a first indication of an astrophysical neutrino flux; the moderate significance, however, does not permit a definitive conclusion at this time.

M. G. Aartsen et al. (IceCube Collaboration)

2013-07-08T23:59:59.000Z

92

Photohadronic origin of the TeV-PeV neutrinos observed in IceCube  

Science Journals Connector (OSTI)

We perform an unbiased search of the origin of the recently observed 28 events above ?30??TeV in the IceCube neutrino observatory, assuming that these are (apart from the atmospheric background) of astrophysical origin produced by photohadronic interactions. Instead of relying on the normalization of the neutrino flux, we demonstrate that spectral shape and flavor composition can be used to constrain or identify the source class. In order to quantify our observations, we use a model where the target photons are produced by the synchrotron emission of coaccelerated electrons, and we include magnetic field effects on the secondary muons, pions, and kaons. We find that the lack of observed events with energies much larger than PeV points towards sources with strong magnetic fields, which do not exhibit a direct correlation between highest cosmic ray and neutrino energies. While the simplest active galactic nuclei models with efficient proton acceleration plausibly describe the current data at about the 3? confidence level, we show that IceCube can rule out that the observed neutrinos stem from the sources of the ultrahigh-energy cosmic rays with a factor of 10 increased statistics at more than 5? if the current observations are confirmed. A possible caveat are sources with strong magnetic fields and high Lorentz factors, such as magnetic energy dominated gamma-ray bursts.

Walter Winter

2013-10-15T23:59:59.000Z

93

Fermion WIMPless dark matter at DeepCore and IceCube  

Science Journals Connector (OSTI)

We investigate the prospects for indirect detection of fermion WIMPless dark matter at the neutrino telescopes IceCube and DeepCore. The dark matter annihilating in the Sun is a hidden sector Majorana fermion that couples through Yukawa couplings to a connector particle and a visible sector particle, and it exhibits only spin-dependent scattering with nuclei via couplings to first generation quarks. We consider cases where the annihilation products are taus, staus, or sneutrinos of the three generations. To evaluate the muon fluxes incident at the detector, we propagate the neutrino spectra through the solar medium and to the Earth and account for the effects of neutrino oscillations, energy losses due to neutral- and charged-current interactions, and tau regeneration. We find that for the stau and sneutrino channels, a 5yr 3? detection of dark matter lighter than about 300GeV is possible at IceCube for large Yukawa couplings or for dark matter and connector particles with similar masses. The tau channel offers far better detection prospects. However, due to its lower energy threshold and better muon background rejection capability, DeepCore is able to detect signals in all annihilation channels and for a wider range of dark matter masses.

Vernon Barger; Jason Kumar; Danny Marfatia; Enrico Maria Sessolo

2010-06-24T23:59:59.000Z

94

Pinning down the cosmic ray source mechanism with new IceCube data  

Science Journals Connector (OSTI)

Very recently the IceCube Collaboration has reported an observation of 28 neutrino candidates with energies between 50TeV and 2PeV, constituting a 4.1? excess compared to the atmospheric background. In this article we investigate the compatibility between the data and a hypothesized unbroken power-law neutrino spectrum for various values of spectral index ??2. We show that ??2.3 is consistent at the ?1.5? level with the observed events up to 2PeV and to the null observation of events at higher energies. We then assume that the sources of this unbroken spectrum are Galactic, and deduce (i)an energy-transfer fraction from parent protons to pions (finding ?? and ??), and (ii)a way of discriminating among models which have been put forth to explain the knee and ankle features of the cosmic ray spectrum. Future IceCube data will test the unbroken power-law hypothesis and provide a multimessenger approach to explaining features of the cosmic ray spectrum, including the transition from Galactic to extragalactic dominance.

Luis A. Anchordoqui; Haim Goldberg; Morgan H. Lynch; Angela V. Olinto; Thomas C. Paul; Thomas J. Weiler

2014-04-04T23:59:59.000Z

95

Limits on a muon flux from Kaluza-Klein dark matter annihilations in the Sun from the IceCube 22-string detector  

SciTech Connect

A search for muon neutrinos from Kaluza-Klein dark matter annihilations in the Sun has been performed with the 22-string configuration of the IceCube neutrino detector using data collected in 104.3 days of live-time in 2007. No excess over the expected atmospheric background has been observed. Upper limits have been obtained on the annihilation rate of captured lightest Kaluza-Klein particle (LKP) WIMPs in the Sun and converted to limits on the LKP-proton cross-sections for LKP masses in the range 250 - 3000 GeV. These results are the most stringent limits to date on LKP annihilation in the Sun.

IceCube Collaboration; Abbasi, R.; al., et

2009-10-23T23:59:59.000Z

96

Limits on a muon flux from Kaluza-Klein dark matter annihilations in the Sun from the IceCube 22-string detector  

Science Journals Connector (OSTI)

A search for muon neutrinos from Kaluza-Klein dark matter annihilations in the Sun has been performed with the 22-string configuration of the IceCube neutrino detector using data collected in 104.3 days of live time in 2007. No excess over the expected atmospheric background has been observed. Upper limits have been obtained on the annihilation rate of captured lightest Kaluza-Klein particle (LKP) WIMPs in the Sun and converted to limits on the LKP-proton cross sections for LKP masses in the range 2503000GeV. These results are the most stringent limits to date on LKP annihilation in the Sun.

R. Abbasi et al. (IceCube Collaboration)

2010-03-29T23:59:59.000Z

97

Galactic Center origin of a subset of IceCube neutrino events  

Science Journals Connector (OSTI)

The center of the MilkyWay is a host to energetic phenomena across many electromagnetic wave bands and now possibly of high-energy neutrinos. We show that 5 out of 21 IceCube showerlike events, including a PeV event, likely originated from the Galactic Center region. A hard spectrum and flux inferred from these events are inconsistent with atmospheric neutrinos. The flux of these neutrinos is consistent with an extrapolation of the gamma-ray flux measured by Fermi-LAT from the inner Galactic region. This indicates a common hadronic origin of both, powered by supernovae. Three other showerlike events are spatially correlated with the Fermi bubbles, originating from the Galactic Center activity, within the uncertainty of reconstructing their arrival directions. The origin of the other neutrino events, including 7 tracklike events, is still elusive.

Soebur Razzaque

2013-10-18T23:59:59.000Z

98

Search for ultrahigh-energy tau neutrinos with IceCube  

Science Journals Connector (OSTI)

The first dedicated search for ultrahigh-energy (UHE) tau neutrinos of astrophysical origin was performed using the IceCube detector in its 22-string configuration with an instrumented volume of roughly 0.25??km3. The search also had sensitivity to UHE electron and muon neutrinos. After application of all selection criteria to approximately 200 live-days of data, we expect a background of 0.600.19(stat)+0.56-0.58(syst) events and observe three events, which after inspection, emerge as being compatible with background but are kept in the final sample. Therefore, we set an upper limit on neutrinos of all flavors from UHE astrophysical sources at 90% C.L. of E?2?90(?x)<16.310-8??GeV?cm-2?sr?-1?s-1 over an estimated primary neutrino energy range of 340TeV to 200PeV.

R. Abbasi et al. (IceCube Collaboration)

2012-07-26T23:59:59.000Z

99

Standard model explanation of the ultrahigh energy neutrino events at IceCube  

Science Journals Connector (OSTI)

The recent observation of two PeV events at IceCube, followed by an additional 26 events between 30 and 300TeV, has generated considerable speculations on its origin, and many exotic new physics explanations have been invoked. For a reliable interpretation, it is, however, important to first scrutinize the Standard Model (SM) expectations carefully, including the theoretical uncertainties, mainly due to the parton distribution functions. Assuming a new isotropic cosmic neutrino flux with a simple unbroken power-law spectrum, ??E?s for the entire energy range of interest, we find that with s=1.52, the SM neutrino-nucleon interactions are sufficient to explain all the observed events so far, without the need for any beyond the SM explanation. With more statistics, this powerful detector could provide a unique test of the SM up to the PeV scale and lead to important clues of new physics.

Chien-Yi Chen; P.?S. Bhupal Dev; Amarjit Soni

2014-02-25T23:59:59.000Z

100

Sensitivity of the IceCube Detector to Astrophysical Sources of High Energy Muon Neutrinos  

E-Print Network (OSTI)

We present the results of a Monte-Carlo study of the sensitivity of the planned IceCube detector to predicted fluxes of muon neutrinos at TeV to PeV energies. A complete simulation of the detector and data analysis is used to study the detector's capability to search for muon neutrinos from sources such as active galaxies and gamma-ray bursts. We study the effective area and the angular resolution of the detector as a function of muon energy and angle of incidence. We present detailed calculations of the sensitivity of the detector to both diffuse and pointlike neutrino emissions, including an assessment of the sensitivity to neutrinos detected in coincidence with gamma-ray burst observations. After three years of datataking, IceCube will have been able to detect a point source flux of E^2*dN/dE = 7*10^-9 cm^-2s^-1GeV at a 5-sigma significance, or, in the absence of a signal, place a 90% c.l. limit at a level E^2*dN/dE = 2*10^-9 cm^-2s^-1GeV. A diffuse E-2 flux would be detectable at a minimum strength of E^2*dN/dE = 1*10^-8 cm^-2s^-1sr^-1GeV. A gamma-ray burst model following the formulation of Waxman and Bahcall would result in a 5-sigma effect after the observation of 200 bursts in coincidence with satellite observations of the gamma-rays.

The IceCube Collaboration; J. Ahrens

2003-05-12T23:59:59.000Z

Note: This page contains sample records for the topic "ice cube section" 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

Study of High pT Muons in IceCube  

SciTech Connect

Muons with a high transverse momentum (p{sub T}) are produced in cosmic ray air showers via semileptonic decay of heavy quarks and the decay of high p{sub T} kaons and pions. These high p{sub T} muons have a large lateral separation from the shower core muon bundle. IceCube is well suited for the detection of high p{sub T} muons. The surface shower array can determine the energy, core location and direction of the cosmic ray air shower while the in-ice array can reconstruct the energy and direction of the high p{sub T} muon. This makes it possible to measure the decoherence function (lateral separation spectrum) at distances greater than 150 meters. The muon p{sub T} can be determined from the muon energy (measured by dE/dx) and the lateral separation. The high p{sub T} muon spectrum may also be calculated in a perturbative QCD framework; this spectrum is sensitive to the cosmic-ray composition.

IceCube Collaboration; Gerhardt, Lisa; Klein, Spencer

2009-06-01T23:59:59.000Z

102

Search for high-energy muon neutrinos from the "naked-eye" GRB080319B with the IceCube neutrino telescope  

E-Print Network (OSTI)

California. Search for high-energy muon neutrinos from the Search for high-energy muon neutrinos from the naked-eyeIceCube detector for high-energy muon neu- trinos from GRB

Abbasi, R.; IceCube Collaboration

2009-01-01T23:59:59.000Z

103

Multimessenger search for sources of gravitational waves and high-energy neutrinos: Initial results for LIGO-Virgo and IceCube  

E-Print Network (OSTI)

We report the results of a multimessenger search for coincident signals from the LIGO and Virgo gravitational-wave observatories and the partially completed IceCube high-energy neutrino detector, including periods of joint ...

Aartsen, M.?G.

104

Constraints on the extremely-high energy cosmic neutrino flux with the IceCube 2008-2009 data  

Science Journals Connector (OSTI)

We report on a search for extremely-high energy neutrinos with energies greater than 106??GeV using the data taken with the IceCube detector at the South Pole. The data was collected between April 2008 and May 2009 with the half-completed IceCube array. The absence of signal candidate events in the sample of 333.5 days of live time significantly improves model-independent limits from previous searches and allows to place a limit on the diffuse flux of cosmic neutrinos with an E-2 spectrum in the energy range 2.0106-6.3109??GeV to a level of E2??3.610-8??GeV?cm-2?sec-1?sr-1.

R. Abbasi et al. (IceCube Collaboration)

2011-05-24T23:59:59.000Z

105

Search for a diffuse flux of astrophysical muon neutrinos with the IceCube 40-string detector  

Science Journals Connector (OSTI)

The IceCube Neutrino Observatory is a 1??km3 detector currently taking data at the South Pole. One of the main strategies used to look for astrophysical neutrinos with IceCube is the search for a diffuse flux of high-energy neutrinos from unresolved sources. A hard energy spectrum of neutrinos from isotropically distributed astrophysical sources could manifest itself as a detectable signal that may be differentiated from the atmospheric neutrino background by spectral measurement. This analysis uses data from the IceCube detector collected in its half completed configuration which operated between April 2008 and May 2009 to search for a diffuse flux of astrophysical muon neutrinos. A total of 12?877 upward-going candidate neutrino events have been selected for this analysis. No evidence for a diffuse flux of astrophysical muon neutrinos was found in the data set leading to a 90% C.L. upper limit on the normalization of an E-2 astrophysical ?? flux of 8.910-9??GeV?cm-2?s-1?sr-1. The analysis is sensitive in the energy range between 35TeV and 7PeV. The 12?877 candidate neutrino events are consistent with atmospheric muon neutrinos measured from 332GeV to 84TeV and no evidence for a prompt component to the atmospheric neutrino spectrum is found.

R. Abbasi et al. (IceCube Collaboration)

2011-10-03T23:59:59.000Z

106

Composition from high $p_\\mathrm{T}$ muons in IceCube  

E-Print Network (OSTI)

Cosmic rays with energies up to $10^{11}\\,\\mathrm{GeV}$ enter the atmosphere and produce showers of secondary particles. Inside these showers muons with high transverse momentum ($p_\\mathrm{T} \\gtrsim 2\\,\\mathrm{GeV}$) are produced from the decay of heavy hadrons, or from high $p_\\mathrm{T}$ pions and kaons very early in the shower development. These isolated muons can have large transverse separations from the shower core up to several hundred meters, together with the muon bundle forming a double or triple track signature in IceCube. The separation from the core is a measure of the transverse momentum of the muon's parent particle. Assuming the validity of perturbative quantum chromodynamics (pQCD) the muon lateral distribution depends on the composition of the incident nuclei, thus the composition of high energy cosmic rays can be determined from muon separation measurements. Vice versa these muons can help to understand uncertainties due to phenomenological models as well as test pQCD predictions of high ...

Soldin, D

2014-01-01T23:59:59.000Z

107

First search for atmospheric and extraterrestrial neutrino-induced cascades with the IceCube detector  

Science Journals Connector (OSTI)

We report on the first search for atmospheric and for diffuse astrophysical neutrino-induced showers (cascades) in the IceCube detector using 257 days of data collected in the year 20072008 with 22 strings active. A total of 14 events with energies above 16TeV remained after event selections in the diffuse analysis, with an expected total background contribution of 8.33.6. At 90% confidence we set an upper limit of E2?90%CL<3.610-7??GeVcm-2s-1sr-1 on the diffuse flux of neutrinos of all flavors in the energy range between 24TeV and 6.6PeV assuming that ??E-2 and the flavor composition of the ?e?????? flux is 1?1?1 at the Earth. The atmospheric neutrino analysis was optimized for lower energies. A total of 12 events were observed with energies above 5TeV. The observed number of events is consistent with the expected background, within the uncertainties.

R. Abbasi et al. (IceCube Collaboration)

2011-10-03T23:59:59.000Z

108

Flavor Composition of the High-Energy Neutrino Events in IceCube  

Science Journals Connector (OSTI)

The IceCube experiment has recently reported the observation of 28 high-energy (>30??TeV) neutrino events, separated into 21 showers and 7 muon tracks, consistent with an extraterrestrial origin. In this Letter, we compute the compatibility of such an observation with possible combinations of neutrino flavors with relative proportion (?e??????)?. Although the 7?21 track-to-shower ratio is naively favored for the canonical (1?1?1)? at Earth, this is not true once the atmospheric muon and neutrino backgrounds are properly accounted for. We find that, for an astrophysical neutrino E?2 energy spectrum, (1?1?1)? at Earth is disfavored at 81%C.L. If this proportion does not change, 6 more years of data would be needed to exclude (1?1?1)? at Earth at 3? C.L. Indeed, with the recently released 3-yr data, that flavor composition is excluded at 92%C.L. The best fit is obtained for (1?0?0)? at Earth, which cannot be achieved from any flavor ratio at sources with averaged oscillations during propagation. If confirmed, this result would suggest either a misunderstanding of the expected background events or a misidentification of tracks as showers, or even more compellingly, some exotic physics which deviates from the standard scenario.

Olga Mena; Sergio Palomares-Ruiz; Aaron C. Vincent

2014-08-28T23:59:59.000Z

109

Lateral distribution of muons in IceCube cosmic ray events  

Science Journals Connector (OSTI)

In cosmic ray air showers, the muon lateral separation from the center of the shower is a measure of the transverse momentum that the muon parent acquired in the cosmic ray interaction. IceCube has observed cosmic ray interactions that produce muons laterally separated by up to 400m from the shower core, a factor of 6 larger distance than previous measurements. These muons originate in high pT (>2??GeV/c) interactions from the incident cosmic ray, or high-energy secondary interactions. The separation distribution shows a transition to a power law at large values, indicating the presence of a hard pT component that can be described by perturbative quantum chromodynamics. However, the rates and the zenith angle distributions of these events are not well reproduced with the cosmic ray models tested here, even those that include charm interactions. This discrepancy may be explained by a larger fraction of kaons and charmed particles than is currently incorporated in the simulations.

R. Abbasi et al. (IceCube Collaboration)

2013-01-07T23:59:59.000Z

110

Cosmic neutrino background absorption line in the neutrino spectrum at IceCube  

Science Journals Connector (OSTI)

The IceCube experiment has recently reported a high energy neutrino spectrum between the TeV and PeV scales. The observed neutrino flux can be as a whole well fitted by a simple power law of the neutrino energy E?, E???? (???2). As a notable feature of the spectrum, however, it has a gap between 500TeV and 1PeV. Although the existence of the gap in the neutrino spectrum is not statistically significant at this point, it is very enticing to ask whether it might hint at some physics beyond the Standard Model. In this paper, we investigate a possibility that the gap can be interpreted as an absorption line in the power-law spectrum by the cosmic neutrino background through a new resonance in the MeV range. We also show that the absorption line has rich information about not only the MeV scale new particle but also the neutrino masses as well as the distances to the astrophysical sources of the high energy neutrinos. Viable models to achieve this possibility are also discussed.

Masahiro Ibe and Kunio Kaneta

2014-09-24T23:59:59.000Z

111

Galactic halo origin of the neutrinos detected by IceCube  

Science Journals Connector (OSTI)

Recent IceCube results suggest that the first detection of very high energy astrophysical neutrinos have been accomplished. We consider these results at face value in a Galactic origin context. Emission scenarios from both the Fermi bubble and broader halo region are considered. We motivate that such an intensity of diffuse neutrino emission could be Galactic in origin if it is produced from an outflow into the halo region. This scenario requires cosmic ray transport within the outflow environment to be different to that inferred locally within the disk and that activity in the central part of the Galaxy accelerates cosmic rays to trans-knee energies before they escape into an outflow. The presence of a large reservoir of gas in a very extended halo around the Galaxy, recently inferred from x-ray observations, implies that the relatively modest acceleration power of 1039 erg s?1 in PeV energy cosmic rays may be sufficient to explain the observed neutrino flux. Such a luminosity is compatible with that required to explain the observed intensity of cosmic rays around the knee.

Andrew M. Taylor; Stefano Gabici; Felix Aharonian

2014-05-05T23:59:59.000Z

112

Search for muon neutrinos from Gamma-Ray Bursts with the IceCube neutrino telescope  

SciTech Connect

We present the results of searches for high-energy muon neutrinos from 41 gamma- ray bursts (GRBs) in the northern sky with the IceCube detector in its 22-string con-figuration active in 2007/2008. The searches cover both the prompt and a possible precursor emission as well as a model-independent, wide time window of -1 h to +3 haround each GRB. In contrast to previous searches with a large GRB population, we do not utilize a standard Waxman?Bahcall GRB flux for the prompt emission but calcu- late individual neutrino spectra for all 41 GRBs from the burst parameters measured by satellites. For all three time windows the best estimate for the number of signal events is zero. Therefore, we place 90percent CL upper limits on the fluence from the prompt phase of 3.7 x 10-3 erg cm-2 (72TeV - 6.5 PeV) and on the fluence from the precursor phase of 2.3 x 10-3 erg cm-2 (2.2TeV - 55TeV), where the quoted energy ranges contain 90percent of the expected signal events in the detector. The 90percent CL upper limit for the wide time window is 2.7 x 10-3 erg cm-2 (3TeV - 2.8 PeV) assuming an E-2 flux.

IceCube Collaboration; Abbasi, R.

2010-01-19T23:59:59.000Z

113

SEARCH FOR TIME-INDEPENDENT NEUTRINO EMISSION FROM ASTROPHYSICAL SOURCES WITH 3 yr OF IceCube DATA  

E-Print Network (OSTI)

of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Received 2013 July 25; accepted 2013 October 8; published 2013 December 3 ABSTRACT We present the results of a search for neutrino point sources using the IceCube data collected between 2008 April and 2011 May...-called first-order Fermi acceleration. Candidate sources of Galactic CRs are supernova explosions and their remnant shocks, which may accelerate charged particles via diffuse shock acceleration up to the CR knee (?3 1015 eV). At higher energies...

Aartsen, M. G.; Besson, David Zeke

2013-12-03T23:59:59.000Z

114

Cascade events at IceCube + DeepCore as a definitive constraint on the dark matter interpretation of the PAMELA and Fermi anomalies  

Science Journals Connector (OSTI)

Dark matter decaying or annihilating into ?+?- or ?+?- has been proposed as an explanation for the e anomalies reported by PAMELA and Fermi. Recent analyses show that IceCube, supplemented by DeepCore, will be able to significantly constrain the parameter space of decays to ?+?-, and rule out decays to ?+?- and annihilations to ?+?- in less than five years of running. These analyses rely on measuring tracklike events in IceCube + DeepCore from down-going ??. In this paper we show that by instead measuring cascade events, which are induced by all neutrino flavors, IceCube + DeepCore can rule out decays to ?+?- in only three years of running, and rule out decays to ?+?- and annihilation to ?+?- in only one year of running. These constraints are highly robust to the choice of dark matter halo profile and independent of dark matter-nucleon crosssection.

Sourav K. Mandal; Matthew R. Buckley; Katherine Freese; Douglas Spolyar; Hitoshi Murayama

2010-02-02T23:59:59.000Z

115

Probing the origin of cosmic rays with extremely high energy neutrinos using the IceCube Observatory  

Science Journals Connector (OSTI)

We have searched for extremely high energy neutrinos using data taken with the IceCube detector between May 2010 and May 2012. Two neutrino-induced particle shower events with energies around 1PeV were observed, as reported previously. In this work, we investigate whether these events could originate from cosmogenic neutrinos produced in the interactions of ultrahigh energy cosmic rays with ambient photons while propagating through intergalactic space. Exploiting IceCubes large exposure for extremely high energy neutrinos and the lack of observed events above 100PeV, we can rule out the corresponding models at more than 90% confidence level. The model-independent quasidifferential 90%C.L. upper limit, which amounts to E2??e+??+??=1.210-7??GeV?cm-2?s-1?sr-1 at 1EeV, provides the most stringent constraint in the energy range from 10PeV to 10EeV. Our observation disfavors strong cosmological evolution of the highest energy cosmic-ray sources such as the Fanaroff-Riley type II class of radio galaxies.

M. G. Aartsen et al. (IceCube Collaboration)

2013-12-16T23:59:59.000Z

116

Gamma-ray astronomy with muons: Sensitivity of IceCube to PeVatrons in the Southern sky  

Science Journals Connector (OSTI)

Northern hemisphere TeV gamma-ray observatories such as Milagro and Tibet AS? have demonstrated the importance of all-sky instruments by discovering previously unidentified sources that may be the PeVatrons producing cosmic rays up to the knee in the cosmic ray spectrum. We evaluate the potential of IceCube to identify similar sources in the southern sky by detailing an analytic approach to determine fluxes of muons from TeV gamma-ray showers. We apply this approach to known gamma-ray sources such as supernova remnants. We find that, similar to Milagro, detection is possible in 10 years for pointlike PeVatrons with fluxes stronger than several 10-11 particles TeV-1??cm-2?s-1.

Francis Halzen; Alexander Kappes; Aongus Murchadha

2009-10-21T23:59:59.000Z

117

Measurement of the atmospheric neutrino energy spectrum from 100GeV to 400TeV with IceCube  

Science Journals Connector (OSTI)

A measurement of the atmospheric muon neutrino energy spectrum from 100GeV to 400TeV was performed using a data sample of about 18?000 up-going atmospheric muon neutrino events in IceCube. Boosted decision trees were used for event selection to reject misreconstructed atmospheric muons and obtain a sample of up-going muon neutrino events. Background contamination in the final event sample is less than 1%. This is the first measurement of atmospheric neutrinos up to 400TeV, and is fundamental to understanding the impact of this neutrino background on astrophysical neutrino observations with IceCube. The measured spectrum is consistent with predictions for the atmospheric ??+?? flux.

R. Abbasi et al. (IceCube Collaboration)

2011-01-05T23:59:59.000Z

118

Energy Cost Calculator for Commercial Ice Machines | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

119

Determining neutrino oscillation parameters from atmospheric muon neutrino disappearance with three years of IceCube DeepCore data  

E-Print Network (OSTI)

We present a measurement of neutrino oscillations via atmospheric muon neutrino disappearance with three years of data of the completed IceCube neutrino detector. DeepCore, a region of denser instrumentation, enables the detection and reconstruction of atmospheric muon neutrinos between 10\\,GeV and 100\\,GeV, where a strong disappearance signal is expected. The detector volume surrounding DeepCore is used as a veto region to suppress the atmospheric muon background. Neutrino events are selected where the detected Cherenkov photons of the secondary particles minimally scatter, and the neutrino energy and arrival direction are reconstructed. Both variables are used to obtain the neutrino oscillation parameters from the data, with the best fit given by $\\Delta m^2_{32}=2.72^{+0.19}_{-0.20}\\times 10^{-3}\\,\\mathrm{eV}^2$ and $\\sin^2\\theta_{23} = 0.53^{+0.09}_{-0.12}$ (normal mass hierarchy assumed). The results are compatible and comparable in precision to those of dedicated oscillation experiments.

Aartsen, M G; Adams, J; Aguilar, J A; Ahlers, M; Ahrens, M; Altmann, D; Anderson, T; Arguelles, C; Arlen, T C; Auffenberg, J; Bai, X; Barwick, S W; Baum, V; Bay, R; Beatty, J J; Tjus, J Becker; Becker, K -H; BenZvi, S; Berghaus, P; Berley, D; Bernardini, E; Bernhard, A; Besson, D Z; Binder, G; Bindig, D; Bissok, M; Blaufuss, E; Blumenthal, J; Boersma, D J; Bohm, C; Bos, F; Bose, D; Bser, S; Botner, O; Brayeur, L; Bretz, H -P; Brown, A M; Brunner, J; Buzinsky, N; Casey, J; Casier, M; Cheung, E; Chirkin, D; Christov, A; Christy, B; Clark, K; Classen, L; Clevermann, F; Coenders, S; Cowen, D F; Silva, A H Cruz; Daughhetee, J; Davis, J C; Day, M; de Andr, J P A M; De Clercq, C; De Ridder, S; Desiati, P; de Vries, K D; de With, M; DeYoung, T; Daz-Vlez, J C; Dunkman, M; Eagan, R; Eberhardt, B; Eichmann, B; Eisch, J; Euler, S; Evenson, P A; Fadiran, O; Fazely, A R; Fedynitch, A; Feintzeig, J; Felde, J; Feusels, T; Filimonov, K; Finley, C; Fischer-Wasels, T; Flis, S; Franckowiak, A; Frantzen, K; Fuchs, T; Gaisser, T K; Gaior, R; Gallagher, J; Gerhardt, L; Gier, D; Gladstone, L; Glsenkamp, T; Goldschmidt, A; Golup, G; Gonzalez, J G; Goodman, J A; Gra, D; Grant, D; Gretskov, P; Groh, J C; Gro, A; Ha, C; Haack, C; Ismail, A Haj; Hallen, P; Hallgren, A; Halzen, F; Hanson, K; Hebecker, D; Heereman, D; Heinen, D; Helbing, K; Hellauer, R; Hellwig, D; Hickford, S; Hill, G C; Hoffman, K D; Hoffmann, R; Homeier, A; Hoshina, K; Huang, F; Huelsnitz, W; Hulth, P O; Hultqvist, K; Hussain, S; Ishihara, A; Jacobi, E; Jacobsen, J; Japaridze, G S; Jero, K; Jlelati, O; Jurkovic, M; Kaminsky, B; Kappes, A; Karg, T; Karle, A; Kauer, M; Keivani, A; Kelley, J L; Kheirandish, A; Kiryluk, J; Kls, J; Klein, S R; Khne, J -H; Kohnen, G; Kolanoski, H; Koob, A; Kpke, L; Kopper, C; Kopper, S; Koskinen, D J; Kowalski, M; Kriesten, A; Krings, K; Kroll, G; Kroll, M; Kunnen, J; Kurahashi, N; Kuwabara, T; Labare, M; Lanfranchi, J L; Larsen, D T; Larson, M J; Lesiak-Bzdak, M; Leuermann, M; Lnemann, J; Madsen, J; Maggi, G; Maruyama, R; Mase, K; Matis, H S; Maunu, R; McNally, F; Meagher, K; Medici, M; Meli, A; Meures, T; Miarecki, S; Middell, E; Middlemas, E; Milke, N; Miller, J; Mohrmann, L; Montaruli, T; Morse, R; Nahnhauer, R; Naumann, U; Niederhausen, H; Nowicki, S C; Nygren, D R; Obertacke, A; Odrowski, S; Olivas, A; Omairat, A; O'Murchadha, A; Palczewski, T; Paul, L; Penek, ; Pepper, J A; Heros, C Prez de los; Pfendner, C; Pieloth, D; Pinat, E; Posselt, J; Price, P B; Przybylski, G T; Ptz, J; Quinnan, M; Rdel, L; Rameez, M; Rawlins, K; Redl, P; Rees, I; Reimann, R; Relich, M; Resconi, E; Rhode, W; Richman, M; Riedel, B; Robertson, S; Rodrigues, J P; Rongen, M; Rott, C; Ruhe, T; Ruzybayev, B; Ryckbosch, D; Saba, S M; Sander, H -G; Sandroos, J; Santander, M; Sarkar, S; Schatto, K; Scheriau, F; Schmidt, T; Schmitz, M; Schoenen, S; Schneberg, S; Schnwald, A; Schukraft, A; Schulte, L; Schulz, O; Seckel, D; Sestayo, Y; Seunarine, S; Shanidze, R; Smith, M W E; Soldin, D; Spiczak, G M; Spiering, C; Stamatikos, M; Stanev, T; Stanisha, N A; Stasik, A; Stezelberger, T; Stokstad, R G; Stl, A; Strahler, E A; Strm, R; Strotjohann, N L; Sullivan, G W; Taavola, H; Taboada, I; Tamburro, A; Tepe, A; Ter-Antonyan, S; Terliuk, A; Tei?, G; Tilav, S; Toale, P A; Tobin, M N; Tosi, D; Tselengidou, M; Unger, E; Usner, M; Vallecorsa, S; van Eijndhoven, N; Vandenbroucke, J; van Santen, J; Vehring, M; Voge, M; Vraeghe, M; Walck, C; Wallraff, M; Weaver, Ch; Wellons, M; Wendt, C; Westerhoff, S; Whelan, B J; Whitehorn, N; Wichary, C; Wiebe, K; Wiebusch, C H; Williams, D R; Wissing, H; Wolf, M; Wood, T R; Woschnagg, K; Xu, D L; Xu, X W; Yanez, J P; Yodh, G; Yoshida, S; Zarzhitsky, P; Ziemann, J; Zoll, M

2014-01-01T23:59:59.000Z

120

The IceCube Data Acquisition Software: Lessons Learned during Distributed, Collaborative, Multi-Disciplined Software Development.  

SciTech Connect

In this experiential paper we report on lessons learned during the development ofthe data acquisition software for the IceCube project - specifically, how to effectively address the unique challenges presented by a distributed, collaborative, multi-institutional, multi-disciplined project such as this. While development progress in software projects is often described solely in terms of technical issues, our experience indicates that non- and quasi-technical interactions play a substantial role in the effectiveness of large software development efforts. These include: selection and management of multiple software development methodologies, the effective useof various collaborative communication tools, project management structure and roles, and the impact and apparent importance of these elements when viewed through the differing perspectives of hardware, software, scientific and project office roles. Even in areas clearly technical in nature, success is still influenced by non-technical issues that can escape close attention. In particular we describe our experiences on software requirements specification, development methodologies and communication tools. We make observations on what tools and techniques have and have not been effective in this geographically disperse (including the South Pole) collaboration and offer suggestions on how similarly structured future projects may build upon our experiences.

Beattie, Keith S; Beattie, Keith; Day Ph.D., Christopher; Glowacki, Dave; Hanson Ph.D., Kael; Jacobsen Ph.D., John; McParland, Charles; Patton Ph.D., Simon

2007-09-21T23:59:59.000Z

Note: This page contains sample records for the topic "ice cube section" 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

Search for a diffuse flux of astrophysical muon neutrinos with the IceCube 59-string configuration  

Science Journals Connector (OSTI)

A search for high-energy neutrinos was performed using data collected by the IceCube Neutrino Observatory from May 2009 to May 2010, when the array was running in its 59-string configuration. The data sample was optimized to contain muon neutrino induced events with a background contamination of atmospheric muons of less than 1%. These data, which are dominated by atmospheric neutrinos, are analyzed with a global likelihood fit to search for possible contributions of prompt atmospheric and astrophysical neutrinos, neither of which have yet been identified. Such signals are expected to follow a harder energy spectrum than conventional atmospheric neutrinos. In addition, the zenith angle distribution differs for astrophysical and atmospheric signals. A global fit of the reconstructed energies and directions of observed events is performed, including possible neutrino flux contributions for an astrophysical signal and atmospheric backgrounds as well as systematic uncertainties of the experiment and theoretical predictions. The best fit yields an astrophysical signal flux for ??+?? of E2?(E)=0.2510?8??GeV?cm?2?s?1?sr?1, and a zero prompt component. Although the sensitivity of this analysis for astrophysical neutrinos surpasses the Waxman and Bahcall upper bound, the experimental limit at 90% confidence level is a factor of 1.5 above at a flux of E2?(E)=1.4410?8??GeV?cm?2?s?1?sr?1.

M.?G. Aartsen et al.

2014-03-25T23:59:59.000Z

122

Probing annihilations and decays of low-mass galactic dark matter in IceCube DeepCore array: Track events  

Science Journals Connector (OSTI)

The deployment of DeepCore array significantly lowers IceCubes energy threshold to about 10GeV and enhances the sensitivity of detecting neutrinos from annihilations and decays of light dark matter. To match this experimental development, we calculate the track event rate in DeepCore array due to neutrino flux produced by annihilations and decays of galactic dark matter. We also calculate the background event rate due to the atmospheric neutrino flux for evaluating the sensitivity of DeepCore array to galactic dark matter signatures. Unlike previous approaches, which set the energy threshold for track events at around 50GeV (this choice avoids the necessity of including the oscillation effect in the estimation of atmospheric background event rate), we have set the energy threshold at 10GeV to take full advantage of DeepCore array. We compare our calculated sensitivity with those obtained by setting the threshold energy at 50GeV. We conclude that our proposed threshold energy significantly improves the sensitivity of DeepCore array to the dark matter signature for m?<100??GeV in the annihilation scenario and m?<300??GeV in the decay scenario.

Fei-Fan Lee and Guey-Lin Lin

2012-01-25T23:59:59.000Z

123

IceCube at NERSC  

NLE Websites -- All DOE Office Websites (Extended Search)

search for extraterrestrial sources of high energy neutrinos from exploding stars, gamma ray bursts, cataclysmic phenomena involving black holes and neutron stars, and from dark...

124

Ice  

NLE Websites -- All DOE Office Websites (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.

125

Melting of hard cubes  

Science Journals Connector (OSTI)

The melting transition of a system of hard cubes is studied numerically both in the case of freely rotating cubes and when there is a fixed orientation of the particles: parallel cubes. It is shown that freely rotating cubes melt through a first-order transition, whereas parallel cubes have a continuous transition in which positional order is lost but bond-orientational order remains finite. This is interpreted in terms of a defect-mediated theory of melting.

E. A. Jagla

1998-10-01T23:59:59.000Z

126

Focusing corner cube  

DOE Patents (OSTI)

This invention retortreflects and focuses a beam of light. The invention comprises a modified corner cube reflector wherein one reflective surface is planar, a second reflective surface is spherical, and the third reflective surface may be planar or convex cylindrical.

Monjes, J.A.

1985-09-12T23:59:59.000Z

127

Recent vs from IceCube  

E-Print Network (OSTI)

searches for ? from Gamma-Ray Bursts (GRBs) and from Weaklytransient ? sources. Gamma-Ray Bursts (GRBs) are perhaps the

Klein, Spencer R.; IceCube Collaboration

2008-01-01T23:59:59.000Z

128

IceCube Project Monthly Report Accomplishments  

E-Print Network (OSTI)

against major fuel price increases beyond normal inflation. $500K Total $9,823K Available Contingency to increasing energy costs. The Antarctic Program's "pump price" paid for fuel that will be used during the FY2009 season was $2.85 per gallon (FY2009 fuel was already shipped). The price is expected

Saffman, Mark

129

First year performance of the IceCube neutrino telescope IceCube Collaboration  

E-Print Network (OSTI)

. Pettersen s , A. Piegsa t , D. Pieloth af , A.C. Pohl ac,2 , R. Porrata d , J. Pretz k , P.B. Price d , G.R. Klein f , S. Klepser af , G. Kohnen u , H. Kolanoski e , L. Ko¨pke t , M. Krasberg s , K. Kuehn o , H

Price, P. Buford

130

Characterizing the Radar Backscatter-Cross-Section Sensitivities of Ice-Phase Hydrometeor Size Distributions via a Simple Scaling of the ClausiusMossotti Factor  

Science Journals Connector (OSTI)

One of the challenges that limit the amount of information that can be inferred from radar measurements of ice and mixed-phase precipitating clouds is the variability in ice mass within hydrometeors. The variable amount of ice mass within ...

Kevin D. Hammonds; Gerald G. Mace; Sergey Y. Matrosov

2014-12-01T23:59:59.000Z

131

Rubik's cube: An energy perspective  

Science Journals Connector (OSTI)

What if we played the Rubik's cube game by simple intuition? We would rotate the cube, probably in the hope of getting a more organized pattern in each next step. Yet frustration occurs easily, and we soon find ourselves trapped as the game progresses no further. Played in this completely strategy-less style, the entire problem of the Rubik's cube game can be compared to that of complex chemical reactions such as protein folding, only with less guidance in the searching process. In this work we look into this random-searching process by means of thermodynamics and compare the game's dynamics with that of a faithful stochastic model constructed from the statistical energy landscape theory (SELT). This comparison reveals the peculiar nature of SELT, which relies on the random energy approximation and often chops up energy correlations among nearby configurations. Our observation provides a general insight for the use of SELT in the studies of these frustrated systems.

Yiing-Rei Chen and Chi-Lun Lee

2014-01-29T23:59:59.000Z

132

THE RELATIONSHIP BETWEEN FINITE GROUPS AND COMPLETELY ORTHOGONAL SQUARES, CUBES, AND HYPER-CUBES  

Science Journals Connector (OSTI)

......SQUARES, CUBES, AND HYPER-CUBES K. A. BROWNLEE P. K. LORAINE The Research Department of the Distillers Company, Ltd. Epsom...CUBES, AND HYPER-CUBES BY K. A. BROWNLFJ? AND P. K. LORAINE The Research Department of the Distillers Company, Ltd......

K. A. BROWNLEE; P. K. LORAINE

133

IceCube: An Instrument for Neutrino Astronomy  

E-Print Network (OSTI)

An Instrument for Neutrino Astronomy Francis Halzen 1 andAn Instrument for Neutrino Astronomy Francis Halzen 1 and94720 Abstract Neutrino astronomy beyond the Sun was first

Halzen, F.

2010-01-01T23:59:59.000Z

134

IceCube: An Instrument for Neutrino Astronomy  

E-Print Network (OSTI)

has not yet been proven. Muon Energy measurement Muons fromshower with 10% of the muon energy, e.g. 130 m for a 100-TeVlight) energy loss and muon energy varies from muon to muon.

Halzen, F.

2010-01-01T23:59:59.000Z

135

Calibration and Characterization of the IceCube Photomultiplier Tube  

E-Print Network (OSTI)

yield proportional to the muon energy [5, 6]. Most light istions can create high energy muons, electrons or taupath. Above 1 TeV, the muon loses energy stochastically to

Abbasi, R.

2010-01-01T23:59:59.000Z

136

IceCube: An Instrument for Neutrino Astronomy  

E-Print Network (OSTI)

such as quasars or gamma-ray bursts unfortunately point tosky with neutrinos from gamma-ray bursts and active galacticor MeV photons in gamma-ray-burst fireballs. Neutral and

Halzen, F.

2010-01-01T23:59:59.000Z

137

arXiv:astroph/0509330 The IceCube Collaboration  

E-Print Network (OSTI)

los Heros q , D. Pieloth d , A.C. Pohl f , R. Porrata i , J. Pretz l , P.B. Price i , G.T. Przybylski , A. Karle o , H. Kawai y , J.L. Kelley o , M. Kestel h , N. Kitamura o , S.R. Klein g , S. Klepser d

Woschnagg, Kurt

138

Fibonacci-like cubes as Z-transformation graphs  

Science Journals Connector (OSTI)

The Fibonacci cube @C"n is a subgraph of n-dimensional hypercube induced by the vertices without two consecutive ones. Klavzar and Zigert [Fibonacci cubes are the resonance graphs of fibonaccenes, Fibonacci Quart. 43 (2005) 269-276] proved that Fibonacci ... Keywords: Fibonacci cube, Lucas cube, Perfect matching, Plane bipartite graph, Resonance graph, Z-transformation graph

Heping Zhang, Lifeng Ou, Haiyuan Yao

2009-04-01T23:59:59.000Z

139

Intrinsic viscosity of a suspension of cubes  

Science Journals Connector (OSTI)

We report on the viscosity of a dilute suspension of cube-shaped particles. Irrespective of the particle size, size distribution, and surface chemistry, we find empirically that cubes manifest an intrinsic viscosity [?]=3.10.2, which is substantially higher than the well-known value for spheres, [?]=2.5. The orientation-dependent intrinsic viscosity of cubic particles is determined theoretically using a finite-element solution of the Stokes equations. For isotropically oriented cubes, these calculations show [?]=3.1, in excellent agreement with our experimental observations.

Rajesh K. Mallavajula; Donald L. Koch; Lynden A. Archer

2013-11-06T23:59:59.000Z

140

Stellar abundances of beryllium and CUBES  

E-Print Network (OSTI)

Stellar abundances of beryllium are useful in different areas of astrophysics, including studies of the Galactic chemical evolution, of stellar evolution, and of the formation of globular clusters. Determining Be abundances in stars is, however, a challenging endeavor. The two Be II resonance lines useful for abundance analyses are in the near UV, a region strongly affected by atmospheric extinction. CUBES is a new spectrograph planned for the VLT that will be more sensitive than current instruments in the near UV spectral region. It will allow the observation of fainter stars, expanding the number of targets where Be abundances can be determined. Here, a brief review of stellar abundances of Be is presented together with a discussion of science cases for CUBES. In particular, preliminary simulations of CUBES spectra are presented, highlighting its possible impact in investigations of Be abundances of extremely metal-poor stars and of stars in globular clusters.

Smiljanic, R

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice cube section" 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

CubeSat attitude control using micronewton electrospray thruster actuation  

E-Print Network (OSTI)

Micronewton electrospray thrusters are a promising new actuator for CubeSat attitude control. Electrospray thrusters have advantages over current state of the art CubeSat attitude actuators in mass, volume, and their ability ...

Van de Loo, Mark David

2014-01-01T23:59:59.000Z

142

Power Cube Pvt Ltd PCPL | Open Energy Information  

Open Energy Info (EERE)

Cube Pvt Ltd PCPL Jump to: navigation, search Name: Power Cube Pvt. Ltd. (PCPL) Place: Uttar Pradesh, India Sector: Solar Product: Plans to set up solar power projects in India....

143

CubeSat deformable mirror demonstration  

E-Print Network (OSTI)

The goal of the CubeSat Deformable Mirror Demonstration (DeMi) is to characterize the performance of a small deformable mirror over a year in low-Earth orbit. Small form factor deformable mirrors are a key technology needed ...

Cahoy, Kerri

144

Measuring the Muon Content of Air Showers with IceTop  

E-Print Network (OSTI)

IceTop, the surface component of the IceCube detector, has been used to measure the energy spectrum of cosmic ray primaries in the range between 1.58 PeV and 1.26 EeV. It can also be used to study the low energy muons in air showers by looking at large distances (> 300m) from the shower axis. We will show the muon lateral distribution function at large lateral distances as measured with IceTop and discuss the implications of this measurement. We also discuss the prospects for low energy muon studies with IceTop.

Gonzalez, Javier G

2015-01-01T23:59:59.000Z

145

Ice Fishing  

NLE Websites -- All DOE Office Websites (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.

146

Ising cubes with enhanced surface couplings  

Science Journals Connector (OSTI)

Using Monte Carlo techniques, Ising cubes with ferromagnetic nearest-neighbor interactions and enhanced couplings between surface spins are studied. In particular, at the surface transition, the corner magnetization shows nonuniversal, coupling-dependent critical behavior in the thermodynamic limit. Results on the critical exponent of the corner magnetization are compared to previous findings on two-dimensional Ising models with three intersecting defect lines.

M. Pleimling and W. Selke

2000-01-01T23:59:59.000Z

147

Fluid Mixtures of Parallel Hard Cubes  

Science Journals Connector (OSTI)

The direct correlation function of a fluid mixture of parallel hard cubes is obtained by using Rosenfeld's fundamental measure approximation. This approximation is thermodynamically consistent (compressibility and virial equations of state are equal) and predicts a spinodal instability of the binary mixture for large-to-small side ratio larger than roughly 10, in qualitative agreement with simulations on the lattice version of the model. In two dimensions the system never demixes, also in agreement with the simulations.

Jos A. Cuesta

1996-05-13T23:59:59.000Z

148

Ice cores drilled from lake and ocean floors, continents, and ice sheets provide geoscientists with the most extensive and accurate picture of the earth!s  

E-Print Network (OSTI)

zer Ice cores drilled from lake and ocean floors, continents, and ice sheets provide geoscientists produces 30 GB of raw imagery. With the ability to display core sections in high resolution, Corelyzer

Johnson, Andrew

149

Cube and Sphere Surface Area and Relative Size  

NLE Websites -- All DOE Office Websites (Extended Search)

Cube and Sphere Surface Area and Relative Size Cube and Sphere Surface Area and Relative Size Name: Andrea Status: student Age: N/A Location: N/A Country: N/A Date: N/A Question: Will a sphere that has the identical surface area as a cube fit inside the cube? Replies: The surface area of a cube is 6L^2 where L is the length of a side. The surface area of a sphere is 4 pi r^2 where r is the radius of the sphere Setting these two terms equal (which we do because the surface areas are equal, [we do not need and exact number, mind you. We just have to know they are equal.]) and doing some algebra we find that the cube has a side 1.414 times as long as the radius of the sphere. BUT WAIT. The radius of the sphere is only half its size (diameter)! To hold the sphere, the cube needs a side of 2r or twice the sphere's radius!! It is only 1.414 times as long so, the sphere will not fit.

150

Dynamic instabilities imparted by CubeSat deployable solar panels  

E-Print Network (OSTI)

In this work, multibody dynamics simulation was used to investigate the effects of solar panel deployment on CubeSat attitude dynamics. Nominal and partial/asymmetric deployments were simulated for four different solar ...

Peters, Eric David

2014-01-01T23:59:59.000Z

151

Power system design for the CSUN CubeSat.  

E-Print Network (OSTI)

??The California State University of Northridge CubeSat, code named CSUNSat, will test a new low-temperature capable, battery/ultra capacitor power system with a low voltage/low power (more)

Keyawa, Matthew

2015-01-01T23:59:59.000Z

152

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

153

Small Angle Diffraction of Light by a Glass Cube  

Science Journals Connector (OSTI)

Experiments on the diffraction of light by a glass cube failed to yield results compatible with a theory of Halpern and Gerjuoy. Although it is possible that the anomalously large amount of scattering predicted by the theory could have been counteracted by the effects of the clamping of the cube, this seems very unlikely. The remaining alternative appears to be that the use of Born approximation in the theory is unjustified.

A. Theodore Forrester and Lothrop Mittenthal

1951-01-15T23:59:59.000Z

154

Arctic ice islands  

SciTech Connect

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

155

Observation of Cosmic-Ray Anisotropy with the IceTop Air Shower Array  

Science Journals Connector (OSTI)

We report on the observation of anisotropy in the arrival direction distribution of cosmic rays at PeV energies. The analysis is based on data taken between 2009 and 2012 with the IceTop air shower array at the south pole. IceTop, an integral part of the IceCube detector, is sensitive to cosmic rays between 100TeV and 1 EeV. With the current size of the IceTop data set, searches for anisotropy at the 103 level can, for the first time, be extended to PeV energies. We divide the data set into two parts with median energies of 400TeV and 2PeV, respectively. In the low energy band, we observe a strong deficit with an angular size of about 30 and an amplitude of ( 1.58 0.46stat 0.52sys) ? 103 at a location consistent with previous observations of cosmic rays with the IceCube neutrino detector. The study of the high energy band shows that the anisotropy persists to PeV energies and increases in amplitude to ( 3.11 0.38stat 0.96sys) ? 103.

M. G. Aartsen; R. Abbasi; Y. Abdou; M. Ackermann; J. Adams; J. A. Aguilar; M. Ahlers; D. Altmann; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; V. Baum; R. Bay; K. Beattie; J. J. Beatty; S. Bechet; J. Becker Tjus; K.-H. Becker; M. Bell; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; S. Bohaichuk; C. Bohm; D. Bose; S. Bser; O. Botner; L. Brayeur; A. M. Brown; R. Bruijn; J. Brunner; M. Carson; J. Casey; M. Casier; D. Chirkin; B. Christy; K. Clark; F. Clevermann; S. Cohen; D. F. Cowen; A. H. Cruz Silva; M. Danninger; J. Daughhetee; J. C. Davis; C. De Clercq; S. De Ridder; F. Descamps; P. Desiati; G. de Vries-Uiterweerd; T. DeYoung; J. C. Daz-Vlez; J. Dreyer; J. P. Dumm; M. Dunkman; R. Eagan; J. Eisch; R. W. Ellsworth; O. Engdegrd; S. Euler; P. A. Evenson; O. Fadiran; A. R. Fazely; A. Fedynitch; J. Feintzeig; T. Feusels; K. Filimonov; C. Finley; T. Fischer-Wasels; S. Flis; A. Franckowiak; R. Franke; K. Frantzen; T. Fuchs; T. K. Gaisser; J. Gallagher; L. Gerhardt; L. Gladstone; T. Glsenkamp; A. Goldschmidt; G. Golup; J. A. Goodman; D. Gra; D. Grant; A. Gross; S. Grullon; M. Gurtner; C. Ha; A. Haj Ismail; A. Hallgren; F. Halzen; K. Hanson; D. Heereman; P. Heimann; D. Heinen; K. Helbing; R. Hellauer; S. Hickford; G. C. Hill; K. D. Hoffman; R. Hoffmann; A. Homeier; K. Hoshina; W. Huelsnitz; P. O. Hulth; K. Hultqvist; S. Hussain; A. Ishihara; E. Jacobi; J. Jacobsen; G. S. Japaridze; O. Jlelati; A. Kappes; T. Karg; A. Karle; J. Kiryluk; F. Kislat; J. Kls; S. R. Klein; J.-H. Khne; G. Kohnen; H. Kolanoski; L. Kpke; C. Kopper; S. Kopper; D. J. Koskinen; M. Kowalski; M. Krasberg; G. Kroll; J. Kunnen; N. Kurahashi; T. Kuwabara; M. Labare; H. Landsman; M. J. Larson; R. Lauer; M. Lesiak-Bzdak; J. Lnemann; J. Madsen; R. Maruyama; K. Mase; H. S. Matis; F. McNally; K. Meagher; M. Merck; P. Mszros; T. Meures; S. Miarecki; E. Middell; N. Milke; J. Miller; L. Mohrmann; T. Montaruli; R. Morse; R. Nahnhauer; U. Naumann; S. C. Nowicki; D. R. Nygren; A. Obertacke; S. Odrowski; A. Olivas; M. Olivo; A. O'Murchadha; S. Panknin; L. Paul; J. A. Pepper; C. Prez de los Heros; D. Pieloth; N. Pirk; J. Posselt; P. B. Price; G. T. Przybylski; L. Rdel; K. Rawlins; P. Redl; E. Resconi; W. Rhode; M. Ribordy; M. Richman; B. Riedel; J. P. Rodrigues; F. Rothmaier; C. Rott; T. Ruhe; B. Ruzybayev; D. Ryckbosch; S. M. Saba; T. Salameh; H.-G. Sander; M. Santander; S. Sarkar; K. Schatto; M. Scheel; F. Scheriau; T. Schmidt; M. Schmitz; S. Schoenen; S. Schneberg; L. Schnherr; A. Schnwald; A. Schukraft; L. Schulte; O. Schulz; D. Seckel; S. H. Seo; Y. Sestayo; S. Seunarine; C. Sheremata; M. W. E. Smith; M. Soiron; D. Soldin; G. M. Spiczak; C. Spiering; M. Stamatikos; T. Stanev; A. Stasik; T. Stezelberger; R. G. Stokstad; A. Stssl; E. A. Strahler; R. Strm; G. W. Sullivan; H. Taavola; I. Taboada; A. Tamburro; S. Ter-Antonyan; S. Tilav; P. A. Toale; S. Toscano; M. Usner; D. van der Drift; N. van Eijndhoven; A. Van Overloop; J. van Santen; M. Vehring; M. Voge; M. Vraeghe; C. Walck; T. Waldenmaier; M. Wallraff; M. Walter; R. Wasserman; Ch. Weaver; C. Wendt; S. Westerhoff; N. Whitehorn; K. Wiebe; C. H. Wiebusch; D. R. Williams; H. Wissing; M. Wolf; T. R. Wood; K. Woschnagg; C. Xu; D. L. Xu; X. W. Xu; J. P. Yanez; G. Yodh; S. Yoshida; P. Zarzhitsky; J. Ziemann; S. Zierke; A. Zilles; M. Zoll; IceCube Collaboration

2013-01-01T23:59:59.000Z

156

Theory of the optical properties of ionic crystal cubes  

Science Journals Connector (OSTI)

A theory is developed for the optical properties of particles of arbitrary shape, composed of a homogeneous isotropic material with a dielectric constant ?(?). The particles are so small that retardation can be neglected. An expression is obtained for the average dielectric constant of a medium containing a small fractional volume of particles. Calculations for a cube show that six resonances contribute to the optical absorption. They span a frequency range such that ??(?), the real part of the dielectric constant, lies between -3.68 and -0.42, as contrasted with the single resonance for a sphere at ??(?)=-2. A comparison of the theory with experiments on the optical absorption of NaCl and MgO cubes shows that the width of the absorption peak can be explained by the frequency range of the cube resonances. Previous theories which assumed spherical particles required an unphysically high damping in ?(?) to account for the width.

R. Fuchs

1975-02-15T23:59:59.000Z

157

Continuum percolation threshold for interpenetrating squares and cubes  

Science Journals Connector (OSTI)

Monte Carlo simulations are performed to determine the critical percolation threshold for interpenetrating square objects in two dimensions and cubic objects in three dimensions. Simulations are performed for two cases: (i) objects whose edges are aligned parallel to one another and (ii) randomly oriented objects. For squares whose edges are aligned, the critical area fraction at the percolation threshold ?c=0.66660.0004, while for randomly oriented squares ?c=0.62540.0002, 6% smaller. For cubes whose edges are aligned, the critical volume fraction at the percolation threshold ?c=0.27730.0002, while for randomly oriented cubes ?c=0.21680.0002, 22% smaller.

Don R. Baker; Gerald Paul; Sameet Sreenivasan; H. Eugene Stanley

2002-10-30T23:59:59.000Z

158

Climate variability in the northern Atlantic, causes and consequences: ICES NAFO Decadal  

E-Print Network (OSTI)

Climate variability in the northern Atlantic, causes and consequences: ICES ­ NAFO Decadal to numerous ground-truth observations, including the Rossby Oleander sections of the Gulf Stream

159

An interoperable XML encoding for the exchange of Spatial OLAP data cubes in SOA environments  

E-Print Network (OSTI)

An interoperable XML encoding for the exchange of Spatial OLAP data cubes in SOA environments addresses the exchange of complete SOLAP data cubes (comprising both spatial and descriptive data data cubes, containing both spatial and de- scriptive data and metadata. It enables the delivery

160

Study of High pT Muons in IceCube  

E-Print Network (OSTI)

be determined from the muon energy (measured by dE/dx) andthe incident nucleon. The muon energy and p T can be relatedshowers. Most of the high-energy muons that are visible in

Gerhardt, Lisa; IceCube Collaboration

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice cube section" 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

Extending the search for neutrino point sources with IceCube above the horizon  

E-Print Network (OSTI)

primarily of high energy muons, produced in extended airsimilar to a single very high energy muon track induced by asuppression of lower energy background muons. This sets it

Abbasi, R.

2010-01-01T23:59:59.000Z

162

First Evidence For Atmospheric Neutrino-Induced Cascades with the IceCube Detector  

E-Print Network (OSTI)

49] P. Meszaros. Gamma-Ray Bursts. Rept. Prog. Phys. , 69:Revealing the supernova-gamma-ray burst connection with TeVcascades from gamma-ray bursts with AMANDA. Astrophys. J. ,

D'Agostino, Michelangelo

2009-01-01T23:59:59.000Z

163

Search for muon neutrinos from Gamma-Ray Bursts with the IceCube neutrino telescope  

E-Print Network (OSTI)

of California. Search for muon neutrinos from Gamma-RaySearch for muon neutrinos from Gamma-Ray Bursts with theof searches for high-energy muon neutrinos from 41 gamma-

Abbasi, R.

2010-01-01T23:59:59.000Z

164

Calibration and characterization of the IceCube photomultiplier tube R. Abbasi z  

E-Print Network (OSTI)

. Petrovic l , A. Piegsa ab , D. Pieloth s , A.C. Pohl aj,3 , R. Porrata g , J. Posselt al , P.B. Price g , M h,g , F. Kislat am , N. Kitamura z , S.R. Klein h,g , S. Knops a , G. Kohnen ac , H. Kolanoski i , L

Yoshida, Shigeru

165

The IceCube data acquisition system: Signal capture, digitization, and timestamping  

E-Print Network (OSTI)

. Pieloth af , A.C. Pohl ac,3 , R. Porrata e , N. Potthoff ae , J. Pretz l , P.B. Price e , G.T. Przybylski. Kawaij , J.L. Kelley t , J. Kiryluk f,e , F. Kislat af , S.R. Klein f,e , S. Kleinfelder f , S. Klepser

Woschnagg, Kurt

166

Neutrino Portal Dark Matter: From Dwarf Galaxies to IceCube  

E-Print Network (OSTI)

It has been suggested that the baseline scenario of collisionless cold dark matter over-predicts the numbers of satellite galaxies, as well as the dark matter (DM) densities in galactic centers. This apparent lack of structure at small scales can be accounted for if one postulates neutrino-DM and DM-DM interactions mediated by light O(MeV) force carriers. In this letter, we consider a simple, consistent model of neutrinophilic DM with these features where DM and a "secluded" SM-singlet neutrino species are charged under a new $U(1)$ gauge symmetry. An important ingredient of this model is that the secluded sector couples to the Standard Model fields only through neutrino mixing. We observe that the secluded and active neutrinos recouple, leading to a large relic secluded neutrino population. This relic population can prevent small-scale halos from collapsing, while at same time significantly modifying the optical depth of ultra-high-energy neutrinos recently observed at Icecube. We find that the bulk of the p...

Cherry, John F; Shoemaker, Ian M

2014-01-01T23:59:59.000Z

167

Section 92  

NLE Websites -- All DOE Office Websites (Extended Search)

cld cld ' CWP 1&f ice k liq % f ice k ice e liq (v) ' A v r liq B v % C v k ice ' 0.005 % 1 r ice Session Papers 409 (1) (2) (3) Shortwave and Longwave Enhancements in the Rapid Radiative Transfer Model E. J. Mlawer and S. A. Clough Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts Introduction This work describes recent advances in the rapid radiative transfer model (RRTM) (Mlawer et al. 1997), a rapid and accurate model designed for climate applications. The initial phase of RRTM, which uses the correlated-k method for radiative transfer, allowed the calculation of fluxes and cooling rates in the longwave region in clear-sky conditions. These calculations have been shown to be accurate relative to fluxes and cooling rates calculated by the well-validated line-by-line radiative transfer model (LBLRTM) (Clough et al. 1992;

168

Effect of contact angle on the orientation, stability, and assembly of dense floating cubes  

Science Journals Connector (OSTI)

In this paper, the effect of contact angle, density, and size on the orientation, stability, and assembly of floating cubes was investigated. All the cubes tested were more dense than water. Floatation occurred as a result of capillary stresses induced by deformation of the air-water interface. The advancing contact angle of the bare acrylic cubes was measured to be 85. The contact angle of the cubes was increased by painting the cubes with a commercially available superhydrophobic paint to reach an advancing contact angle of 150. Depending on their size, density, and contact angle, the cubes were observed to float in one of three primary orientations: edge up, vertex up, and face up. An experimental apparatus was built such that the sum of the gravitational force, buoyancy force, and capillary forces could be measured using a force transducer as a function of cube position as it was lowered through the air-water interface. Measurements showed that the maximum capillary forces were always experienced for the face up orientation. However, when floatation was possible in the vertex up orientation, it was found to be the most stable cube orientation because it had the lowest center of gravity. A series of theoretical predictions were performed for the cubes floating in each of the three primary orientations to calculate the net force on the cube. The theoretical predictions were found to match the experimental measurements well. A cube stability diagram of cube orientation as a function of cube contact angle and size was prepared from the predictions of theory and found to match the experimental observations quite well. The assembly of cubes floating face up and vertex up were also studied for assemblies of two, three, and many cubes. Cubes floating face up were found to assemble face-to-face and form regular square lattice patterns with no free interface between cubes. Cubes floating vertex up were found to assemble in a variety of different arrangements including edge-to-edge, vertex-to-vertex, face-to-face, and vertex-to-face with the most probably assembly being edge-to-edge. Large numbers of vertex up cubes were found to pack with a distribution of orientations and alignments.

Robert Daniello; Kashan Khan; Michael Donnell; Jonathan P. Rothstein

2014-02-26T23:59:59.000Z

169

Mobile Ice Nucleus Spectrometer  

SciTech Connect

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

170

Ice age paleotopography  

SciTech Connect

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

171

Fish Smother Under Ice  

NLE Websites -- All DOE Office Websites (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.

172

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

173

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

174

Section 82  

NLE Websites -- All DOE Office Websites (Extended Search)

µm µm µm µm µm µm Session Papers 361 Figure 1. Beaufort Sea region over which BASE flight campaigns were conducted. Boxes denote regions where cloudy boundary layers were sampled and are annotated with their corresponding flight numbers. Radiative and Microphysical Properties of Autumnal Arctic Clouds J. O. Pinto and J. A. Curry Program in Atmospheric and Oceanic Sciences University of Colorado Boulder, Colorado Introduction Clouds strongly modulate the surface energy budget over the Arctic ice pack. In autumn, as the amount of insolation rapidly decreases, their main influence is felt through enhancing the emissivity of the cold dry atmosphere. During autumn, low clouds are present over the arctic ice pack nearly 60% of the time. In addition, ice clouds, which are not

175

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

176

Vacancy-stabilized crystalline order in hard cubes  

E-Print Network (OSTI)

We examine the effect of vacancies on the phase behavior and structure of systems consisting of hard cubes using event-driven molecular dynamics and Monte Carlo simulations. We find a first-order phase transition between a fluid and a simple cubic crystal phase that is stabilized by a surprisingly large number of vacancies, reaching a net vacancy concentration of ~6.4% near bulk coexistence. Remarkably, we find that vacancies increase the positional order in the system. Finally, we show that the vacancies are delocalized and therefore hard to detect.

Frank Smallenburg; Laura Filion; Matthieu Marechal; Marjolein Dijkstra

2012-09-16T23:59:59.000Z

177

Threshold Law for Attractive Inverse-Cube Interactions  

Science Journals Connector (OSTI)

For scattering by potentials with attractive inverse-cube (-C3/r3) tails, the threshold law for elastic collisions is presented. The expansion of the scattering phase shift contains all terms up to and including O(k2) and only relies on the value of the threshold quantum numbers remainder ??[0,1), which accounts for short-range deviations of the full potential from the pure -C3/r3 form. In contrast to previous approaches, the threshold law presented provides a connection to the regular solution at zero energy as well as to the position of a weakly bound s-wave state.

Tim-Oliver Mller

2013-06-24T23:59:59.000Z

178

IAA-CU-13-11-06 Using independent combinations of CubeSat  

E-Print Network (OSTI)

IAA-CU-13-11-06 Using independent combinations of CubeSat solar panels as sun sensors. Using solar panels on 5 of 6 sides of the NUTS CubeSat, we have a lot of atti- tude determinating information readily available during much of the periodical orbit. Using three or more solar panels

Gravdahl, Jan Tommy

179

Une architecture oriente service Web pour la constitution de mini-cubes SOLAP pour  

E-Print Network (OSTI)

mobile com- puting, Web service, service-oriented architecture. Revue internationale de géomatique ­ XUne architecture orientée service Web pour la constitution de mini-cubes SOLAP pour clients mobiles sur les architectures orientées services et les technologies des services Web, pour adapter les cubes

180

Novel "Smart Cube" Wireless Sensors with Embedded Processing/Communication/Power Core for "Smart  

E-Print Network (OSTI)

and measurement data. II. BACKGROUND DATA A. RFID Sensors The two responsibilities of wireless sensorsNovel "Smart Cube" Wireless Sensors with Embedded Processing/Communication/Power Core for "Smart presents a novel topology of isotropically radiating "smart cubes" for use in wireless sensors. The novelty

Tentzeris, Manos

Note: This page contains sample records for the topic "ice cube section" 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

American Institute of Aeronautics and Astronautics Electrolysis Propulsion for CubeSat-Scale Spacecraft  

E-Print Network (OSTI)

is becoming clear. A water-electrolysis propulsion system for 3U CubeSats is proposed that could fill the gapAmerican Institute of Aeronautics and Astronautics 1 Electrolysis Propulsion for Cube as electrolyte. With over 1 km/s of V from 1 kg of water as propellant, sample missions include compensating

Peck, Mason A.

182

HASQARD Section 4  

NLE Websites -- All DOE Office Websites (Extended Search)

without breaking the seal. Samples shall be shipped in insulated containers with either synthetic ice or ice packed in plastic bags when samples require cooling to 42C."...

183

Belgium's Ghent University Prepares their E-Cube for Solar Decathlon 2011  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Belgium's Ghent University Prepares their E-Cube for Solar Belgium's Ghent University Prepares their E-Cube for Solar Decathlon 2011 Belgium's Ghent University Prepares their E-Cube for Solar Decathlon 2011 June 9, 2011 - 5:25pm Addthis Photo of Ghent University's E-Cube, under construction in Belgium. | Courtesy of the Ghent University Solar Decathlon Team Photo of Ghent University's E-Cube, under construction in Belgium. | Courtesy of the Ghent University Solar Decathlon Team Erik Hyrkas Erik Hyrkas Media Relations Specialist, Office of Energy Efficiency & Renewable Energy What are the key facts? The home is designed as a pre-engineered kit that can be easily constructed by communities without the need of specialty workers or help from outside financial institutions. Ghent University's home meets Passive House standards with

184

FedScope Employment Cube (September 2011) | Data.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

September 2011) September 2011) BusinessUSA Data/Tools Apps Challenges Let's Talk BusinessUSA You are here Data.gov » Communities » BusinessUSA » Data FedScope Employment Cube (September 2011) Dataset Summary Description This raw data set provides Federal civilian employee population data as of September 2011. The scope of this raw data set includes all data elements used in the creation of the FedScope Employment Cube (http://www.fedscope.opm.gov/). The following workforce characteristics are available for analysis: Agency, State/Country, Occupation, Occupation Category, Pay Plan & Grade, GS & Equivalent Grade, Salary Level ($10,000 interval), Work Schedule, Type of Appointment, Gender, Age (5 year interval), Length of Service (5 year interval), Employment, Average Salary, and Average Length of Service. Starting in FY 2010, the OPM Enterprise Human Resources Integration-Statistical Data Mart (EHRI-SDM) is the source for all FedScope data. Data is processed on a quarterly basis (i.e. March, June, September and December).

185

FedScope Employment Cube (December 2011) | Data.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

December 2011) December 2011) BusinessUSA Data/Tools Apps Challenges Let's Talk BusinessUSA You are here Data.gov » Communities » BusinessUSA » Data FedScope Employment Cube (December 2011) Dataset Summary Description This raw data set provides Federal civilian employee population data as of December 2011. The scope of this raw data set includes all data elements used in the creation of the FedScope Employment Cube (http://www.fedscope.opm.gov/). The following workforce characteristics are available for analysis: Agency, State/Country, Occupation, Occupation Category, Pay Plan & Grade, GS & Equivalent Grade, Salary Level ($10,000 interval), Work Schedule, Type of Appointment, Gender, Age (5 year interval), Length of Service (5 year interval), Employment, Average Salary, and Average Length of Service. Starting in FY 2010, the OPM Enterprise Human Resources Integration-Statistical Data Mart (EHRI-SDM) is the source for all FedScope data. Data is processed on a quarterly basis (i.e. March, June, September and December).

186

Random packing of lines in a lattice cube  

Science Journals Connector (OSTI)

A study is made of the random sequential packing of complete lines in a cube of integer lattice points, with side N. For N?15 exact packing fractions are computed. It is found that if line occupation attempts arrive as a spatial Poisson process the packing has two distinct phases; initially where large numbers of potential adsorption sites are blocked, and subsequently where no further blocking occurs so that filling is exponential in time. It is shown that the ratio of the durations of the blocking to the nonblocking phases falls to zero as N??. In this limit, the packing fraction at time t is ?(t)=34(1?e?t). The rapid switch between phases in large systems creates a dramatic fall in the packing rate at the start of the process. This becomes a discontinuity as N?? and is a consequence of the high aspect ratio of the packing objects. It provides a physical explanation for the diverging coefficients in expansions of ?(t) about t=0 for objects with diverging aspect ratio. After considering the three-dimensional case, the analysis is extended to d-dimensional cubes, for which it is conjectured that ?=d/2d?1 in the limit N??.

D. J. Burridge

2010-03-09T23:59:59.000Z

187

Ice cream headache  

NLE Websites -- All DOE Office Websites (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!

188

Ice Heating Up Cold Clouds | EMSL  

NLE Websites -- All DOE Office Websites (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...

189

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

190

Section 51  

NLE Websites -- All DOE Office Websites (Extended Search)

7 7 Determination of Infrared Radiative Properties of Ice Clouds and Their Parameterizations for Climate Models Q. Fu and W. B. Sun Department of Oceanography, Dalhousie University Halifax, Canada P. Yang Department of Meteorology, University of Utah Salt Lake City, Utah A composite methodology to determine infrared radiative clouds is developed based on the improved single-scattering properties of ice clouds is developed based on the finite-differ- calculations, which is well suited for incorporation in climate ence time domain technique. It is shown that both the models to study the climate effects of cirrus clouds. Further- anomalous diffraction theory and the geometric optics method more, understanding of absorption and scattering by underestimate the emissivity of cirrus clouds, while the Mie

191

Section 118  

NLE Websites -- All DOE Office Websites (Extended Search)

m m D m r e D m . 2.4 r e , D m D m 25 Fm Session Papers 539 Variability of Ice Cloud Microphysical Parameters as Revealed by a Remote Sensing Method S. Y. Matrosov Cooperative Institute for Research in Environmental Sciences University of Colorado at Boulder and National Oceanic and Atmospheric Agency Environment Technology Laboratory Boulder, Colorado R. A. Kropfli National Oceanic and Atmospheric Agency Environmental Technology Laboratory Boulder, Colorado Introduction The vertical distribution of cloud radiative parameters is important for determining cloud feedback in the climatic sys- tem. The radiative parameters of clouds are governed by their microphysical properties such as cloud particle characteristic size and ice water content (IWC). To improve the representation of clouds in general circulation

192

Section 120  

NLE Websites -- All DOE Office Websites (Extended Search)

Platt Platt r Platt r e r Platt r e r Platt Session Papers 543 Verification of Cirrus Cloud Parameterizations Using Southern Great Plains Data D. A. Sovchik and T. P. Ackerman Pennsylvania State University University Park, Pennsylvania G. G. Mace University of Utah Salt Lake City, Utah Introduction An evaluation of several diagnostic cirrus cloud parameteriza- tions is presented in this study using data from the Department of Energy's Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site. We consider three parameterizations of ice water content (IWC) proposed by Heymsfield and Donner (HD 1990), Stephens et al. (ST 1990), and Slingo and Slingo (SL 1991), each coupled with parameterizations of the ice particle size characteristics by Heymsfield and Platt (HP 1984), Mitchell (MI 1994) and Platt

193

Section 59  

NLE Websites -- All DOE Office Websites (Extended Search)

e e ' IWC D i P t N(D)' N o D v exp(&8D) m ' "D $ P ' FD * D e ' " 1 (($ 1 %<%1,D o 8) 8 $ 1 %<%1 % " 2 ' ($ 2 % <% 1,D o 8) 8 $ 2 %<%1 F 1 ((* 1 %<%1,D o 8) 8 * 1 %<%1 % * 2 '(F 2 %<%1,D o 8) 8 * 2 %<%1 $ ext ' 2 IWC D i D e $ abs ' Q ab P t Session Papers 253 (1) (2) (3) (4) (5) (6) (7) General Circulation Model Sensitivity of Globally Averaged Albedo and Outgoing Longwave Radiation to Ice Crystal Shape D. L. Mitchell Desert Research Institute Reno, Nevada J. M. Edwards Hadley Centre for Climate Prediction and Research, Meteorological Office Bracknell, United Kingdom P. N. Francis Meteorological Research Flight Farnborough, United Kingdom We will first demonstrate the sensitivity of cirrus radiative properties to ice crystal shape by reformulating a recent treat- ment of radiative properties (Mitchell et al. 1996c) in terms of

194

25 People x 4 Days + 1 Manual = Team Belgium's E-Cube | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

5 People x 4 Days + 1 Manual = Team Belgium's E-Cube 5 People x 4 Days + 1 Manual = Team Belgium's E-Cube 25 People x 4 Days + 1 Manual = Team Belgium's E-Cube September 27, 2011 - 4:41pm Addthis Pieter Jan De Loof, a student at Ghent University, displays the assembly instructions for E-Cube, Team Belgium’s entry to the U.S. Department of Energy Solar Decathlon 2011. Pieter Jan De Loof, a student at Ghent University, displays the assembly instructions for E-Cube, Team Belgium's entry to the U.S. Department of Energy Solar Decathlon 2011. Assembly instructions for the external window shades on “E-Cube,” Team Belgium’s entry to the U.S. Department of Energy Solar Decathlon 2011. Assembly instructions for the external window shades on "E-Cube," Team Belgium's entry to the U.S. Department of Energy Solar Decathlon 2011.

195

25 People x 4 Days + 1 Manual = Team Belgium's E-Cube | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

25 People x 4 Days + 1 Manual = Team Belgium's E-Cube 25 People x 4 Days + 1 Manual = Team Belgium's E-Cube 25 People x 4 Days + 1 Manual = Team Belgium's E-Cube September 27, 2011 - 4:41pm Addthis Pieter Jan De Loof, a student at Ghent University, displays the assembly instructions for E-Cube, Team Belgium’s entry to the U.S. Department of Energy Solar Decathlon 2011. Pieter Jan De Loof, a student at Ghent University, displays the assembly instructions for E-Cube, Team Belgium's entry to the U.S. Department of Energy Solar Decathlon 2011. Assembly instructions for the external window shades on “E-Cube,” Team Belgium’s entry to the U.S. Department of Energy Solar Decathlon 2011. Assembly instructions for the external window shades on "E-Cube," Team Belgium's entry to the U.S. Department of Energy Solar Decathlon 2011.

196

The Inverse-Cube Central Force Field in Quantum Mechanics  

Science Journals Connector (OSTI)

The problem of the motion of a particle in an inverse-cube central force field is fully treated by quantum mechanics and the results compared with the classical theory. Taking the effective radial potential energy as Sr2, although the solutions for negative energy for 0?S?-h232?2? satisfy the usual boundary conditions, they can not be admitted because the Hamiltonian is not Hermitian in these solutions. This corresponds to taking (l+12)2 in place of l(l+1) as the analogue of the square of the classical angular momentum. If we do this, we get a complete analogy between the classical and quantum mechanically allowed solutions, with no quantization. The solutions involve Bessel functions of both real and imaginary orders with both real and imaginary arguments.

George H. Shortley

1931-07-01T23:59:59.000Z

197

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

198

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

199

Detecting extra-galactic supernova neutrinos in the Antarctic ice  

E-Print Network (OSTI)

Building on the technological success of the IceCube neutrino telescope, we outline a prospective low-energy extension that utilizes the clear ice of the South Pole. Aiming at a 10 Mton effective volume and a 10 MeV threshold, the detector would provide sufficient sensitivity to detect neutrino bursts from core-collapse supernovae (SNe) in nearby galaxies. The detector geometry and required density of instrumentation are discussed along with the requirements to control the various sources of background, such as solar neutrinos. In particular, the suppression of spallation events induced by atmospheric muons poses a challenge that will need to be addressed. Assuming this background can be controlled, we find that the resulting detector will be able to detect SNe from beyond 10 Mpc, delivering between 10 and 41 regular core-collapse SN detections per decade. It would further allow to study more speculative phenomena, such as optically dark (failed) SNe, where the collapse proceeds directly to a black hole, at a detection rate similar to that of regular SNe. We find that the biggest technological challenge lies in the required number of large area photo-sensors, with simultaneous strict limits on the allowed noise rates. If both can be realized, the detector concept we present will reach the required sensitivity with a comparatively small construction effort and hence offers a route to future routine observations of SNe with neutrinos.

Sebastian Bser; Marek Kowalski; Lukas Schulte; Nora Linn Strotjohann; Markus Voge

2014-07-28T23:59:59.000Z

200

Acoustic detection of astrophysical neutrinos in South Pole ice  

E-Print Network (OSTI)

When high-energy particles interact in dense media to produce a particle shower, most of the shower energy is deposited in the medium as heat. This causes the medium to expand locally and emit a shock wave with a medium-dependent peak frequency on the order of 10 kHz. In South Pole ice in particular, the elastic properties of the medium have been theorized to provide good coupling of particle energy to acoustic energy. The acoustic attenuation length has been theorized to be several km, which could enable a sparsely instrumented large-volume detector to search for rare signals from high-energy astrophysical neutrinos. We simulated a hybrid optical/radio/acoustic extension to the IceCube array, specifically intended to detect cosmogenic (GZK) neutrinos with multiple methods simultaneously in order to achieve high confidence in a discovered signal and to measure angular, temporal, and spectral distributions of GZK neutrinos. This work motivated the design, deployment, and operation of the South Pole Acoustic Te...

Vandenbroucke, Justin

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ice cube section" 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

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 290Mt/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 1kg equivalent LNG cold energy can obtain about 2kg 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

202

Thermal mass performance in residential construction : an energy analysis using a cube model  

E-Print Network (OSTI)

Given the pervasiveness of energy efficiency concerns in the built environment, this research aims to answer key questions regarding the performance of thermal mass construction. The work presents the Cube Model, a simplified ...

Ledwith, Alison C. (Alison Catherine)

2012-01-01T23:59:59.000Z

203

Fast star tracker centroid algorithm for high performance CubeSat with air bearing validation  

E-Print Network (OSTI)

State of the art CubeSats such as ExoplanetSat require pointing precision for the science payload on the order of arcseconds. ExoplanetSat uses dual stage control to achieve the pointing requirement. Reaction wheels provide ...

Knutson, Matthew W. (Matthew Walter)

2012-01-01T23:59:59.000Z

204

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

205

Image Content Engine (ICE)  

SciTech Connect

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

206

Advertising Section  

Science Journals Connector (OSTI)

Advertising Section ... "Situations wanted" advertisements will be classified by type of chemistry (analytical, biochemistry, etc.). ... State ACS membership status and mail advertisements to Chemical & Engineering News, Classified Advertising. ...

1982-01-11T23:59:59.000Z

207

Advertising Section  

Science Journals Connector (OSTI)

Advertising Section ... "Situations wanted" advertisements will be classified by type of chemistry (analytical, biochemistry, etc.). ... State ACS membership status and mail advertisements to Chemical & Engineering News, Classified Advertising. ...

1984-03-19T23:59:59.000Z

208

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

209

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

210

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

211

ARM - Lesson Plans: When Land Ice Melts  

NLE Websites -- All DOE Office Websites (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...

212

Section 70  

NLE Websites -- All DOE Office Websites (Extended Search)

Figure 1. Cutaway view of the new version of HYVIS. Figure 1. Cutaway view of the new version of HYVIS. Microphysical Properties of Mid-latitude Cirrus Clouds Observed with Hydrometeor Videosonde N. Orikasa, M. Murakami, H. Mizuno, Y. Yamada and M. Miyao Meteorological Research Institute Tsukuba 305, Japan Introduction High-level ice clouds play a complex role in the global energy budget by affecting infrared radiation emitted by the earth's surface. In order to understand the climate system, it is necessary to increase our knowledge about the microphysical, radiative, and optical properties of cirrus clouds. In situ measurements on microphysical structures of cirrus clouds have been made by using special, high-altitude flying aircraft. Limited studies have been made to date. Two-dimensional optical array probes, which are often used for aircraft

213

Section 10  

NLE Websites -- All DOE Office Websites (Extended Search)

Impact of Environmental Conditions on the Mesoscale Impact of Environmental Conditions on the Mesoscale Characteristics of Squall-Line Systems: Toward the Development of Anvil Cirrus Parameterization for General Circulation Models H.-N. S. Chin and M. M. Bradley Atmospheric Sciences Division Lawrence Livermore National Laboratory Livermore, California Introduction Model and Initialization Our earlier studies (Chin 1994; Chin et al. 1995) indicated The model used is an extension of Chin and Ogura's (1989) that in the mesoscale convective systems (MCSs), a strong two-dimensional (2-D) cloud model, which is nonhydrostatic coupling exists between deep convection and its related anvil and fully compressible. The major improvements include ice cloud through the interaction among dynamical, microphysics and radiation transfer schemes for longwave

214

Section J  

Office of Environmental Management (EM)

M-1 Section J Appendix M Key Design, Licensing and Site Management M&O Milestone Chart Activity Planned Date Develop and Submit CD-2 (25%-30%) 082009 Submission of Construction...

215

Advertising Section  

Science Journals Connector (OSTI)

Advertising Section ... ACS MEMBER RATES "Situations wanted" advertisements will be classified by the chemical field designated by the member. ... State ACS membership status and mail advertisements to Chemical & Engineering News, Classified Advertising, 1599 Post Road East, P.O. ...

1993-11-01T23:59:59.000Z

216

Advertising Section  

Science Journals Connector (OSTI)

Advertising Section ... "Situations wanted" advertisements will be classified by type of chemistry (analytical, biochemistry, etc.). ... State ACS membership status and mail advertisements to Chemical & Engineering News, Classified Advertising, 25 Sylvan Rd. ...

1985-04-15T23:59:59.000Z

217

Advertising Section  

Science Journals Connector (OSTI)

Advertising Section ... "Situations wanted" advertisements will be classified by type of chemistry (analytical, biochemistry, etc.). ... State ACS membership status and mail advertisements to Chemical & Engineering News, Classified Advertising, 25 Sylvan Rd. ...

1985-07-22T23:59:59.000Z

218

Advertising Section  

Science Journals Connector (OSTI)

Advertising Section ... "Situations wanted" advertisements will be classified by type of chemistry (analytical, biochemistry, etc.). ... State ACS membership status and mail advertisements to Chemical & Engineering News, Classified Advertising, 25 Sylvan Rd. ...

1986-04-28T23:59:59.000Z

219

Advertising Section  

Science Journals Connector (OSTI)

Advertising Section ... "Situations wanted" advertisements will be classified by type of chemistry (analytical, biochemistry, etc.). ... State ACS membership status and mail advertisements to Chemical & Engineering News, Classified Advertising, 500 Post Road East, P.O. ...

1987-06-22T23:59:59.000Z

220

Advertising Section  

Science Journals Connector (OSTI)

Advertising Section ... "Situations wanted" advertisements will be classified by type of chemistry (analytical, biochemistry, etc.). ... State ACS membership status and mail advertisements to Chemical & Engineering News, Classified Advertising, 500 Post Road East, P.O. ...

1992-01-27T23:59:59.000Z

Note: This page contains sample records for the topic "ice cube section" 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

Advertising Section  

Science Journals Connector (OSTI)

Advertising Section ... "Situations wanted" advertisements will be classified by type of chemistry (analytical, biochemistry, etc.). ... State ACS membership status and mail advertisements to Chemical & Engineering News, Classified Advertising, 25 Sylvan Rd. ...

1983-02-14T23:59:59.000Z

222

Advertising Section  

Science Journals Connector (OSTI)

Advertising Section ... "Situations wanted" advertisements will be classified by type of chemistry (analytical, biochemistry, etc.). ... State ACS membership status and mail advertisements to Chemical & Engineering News, Classified Advertising, 1599 Post Road East, P.O. ...

1992-03-30T23:59:59.000Z

223

Advertising Section  

Science Journals Connector (OSTI)

Advertising Section ... "Situations wanted" advertisements will be classified by type of chemistry (analytical, biochemistry, etc.). ... State ACS membership status and mail advertisements to Chemical & Engineering News, Classified Advertising, 500 Post Road East, P.O. ...

1989-01-02T23:59:59.000Z

224

Advertising Section  

Science Journals Connector (OSTI)

Advertising Section ... "Situations wanted" advertisements will be classified by type of chemistry (analytical, biochemistry, etc.). ... State ACS membership status and mail advertisements to Chemical & Engineering News, Classified Advertising, 1599 Post Road East, P.O. ...

1992-03-02T23:59:59.000Z

225

SECTION J  

Office of Environmental Management (EM)

J-1 SECTION J APPENDIX J PERFORMANCE EVALUATION AND MEASUREMENT PLAN (TO BE NEGOTIATED AFTER CONTRACT AWARD) Contract No.: DE-RW0000005 QA:QA J-J-2 Page Blank...

226

Section I  

NLE Websites -- All DOE Office Websites (Extended Search)

Projectile and Target Z-scaling of Target K-vacancy Production Cross Sections at 10A MeV R. L. Watson, V. Horvat and K. E. Zaharakis Molecular Orbital Effects in Near-symmetric...

227

SECTION E  

NLE Websites -- All DOE Office Websites (Extended Search)

Attachment P Completion Definition Sheets for Incentive Fee C.1 Activity Milestone Completion Incentive WTP Contract Section J Contract No. DE-AC27-01RV14136 Conformed...

228

Limits on a muon flux from neutralino annihilations in the Sun with the IceCube 22-string detector  

E-Print Network (OSTI)

rect searches [21, 22]. A muon energy threshold of 1 GeV wasangular error ?, the mean muon energy , the e?ectivetices the mean energy of simulated signal muons ranges from

Klein, Spencer; IceCube Collaboration

2009-01-01T23:59:59.000Z

229

Limits on a muon flux from neutralino annihilations in the Sun with the IceCube 22-string detector  

E-Print Network (OSTI)

California. APS/123-QED Limits on a muon ?ux from neutralinoLimits on a muon flux from neutralino annihilations in theApril 28, 2009) A search for muon neutrinos from neutralino

Klein, Spencer; IceCube Collaboration

2009-01-01T23:59:59.000Z

230

The IceCube Collaboration:contributions to the 30 th International Cosmic Ray Conference (ICRC 2007),  

E-Print Network (OSTI)

variety of sources (gamma-ray bursts, active galac- ticgalactic nuclei or gamma-ray bursts [1, 2]. Instead ofnuclei (AGN) and gamma-ray bursts (GRB) are potential

Ackermann, M.; IceCube Collaboration

2008-01-01T23:59:59.000Z

231

Searches for high-energy neutrino emission in the Galaxy with the combined IceCube-AMANDA detector  

E-Print Network (OSTI)

Providence Dr., Anchorage, AK 99508, USA 44 Department of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK 45 Department of Physics, University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados 46 NASA Goddard Space Flight... sources of cosmic rays in the Galaxy are the remnants of supernovae (both shell-type and pulsar wind nebulae), the jets of microquasars, and the collective winds of massive stars (Hillas 2005; Tavani et al. 2009; Corbel & Fermi-LAT Collaboration 2010...

Abbasi, R.; Besson, David Zeke

2013-01-03T23:59:59.000Z

232

Therapeutic Hypothermia: Protective Cooling Using Medical Ice...  

NLE Websites -- All DOE Office Websites (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...

233

ARM - Measurement - Cloud ice particle  

NLE Websites -- All DOE Office Websites (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

234

Section J  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

L-1 L-1 Section J Appendix L MEMORANDUM FROM DAVID R. HILL, GENERAL COUNSEL, DATED NOVEMBER 30, 2006, SUBJECT: ONGOING LICENSING SUPPORT NETWORK ("LSN") OBLIGATIONS Contract No.: DE-RW0000005 QA:QA J-L-2 Contract No.: DE-RW0000005 QA:QA J-L-3 Contract No.: DE-RW0000005

235

Advertising Section  

Science Journals Connector (OSTI)

Advertising Section ... "Situations wanted" advertisements placed by employed ACS members and student affiliates are accepted at 50 cents per word per insertion, no minimum charge. ... State ACS membership status and mail advertisements to CHEMICAL AND ENGINEERING NEWS, Classified Advertising, 25 Sylvan Rd. ...

1980-08-11T23:59:59.000Z

236

CFD simulation of airflow over a regular array of cubes. Part I: Three-dimensional simulation of the flow and validation with wind-tunnel measurements  

Science Journals Connector (OSTI)

Air flow inside an array of cubes is simulated. Cubes (edge length 0.15m) are arranged in a regular array, separated by 0.15m in the streamwise and spanwise directions. Numerical simulations are performed based...

Jose Luis Santiago; Alberto Martilli; Fernando Martn

2007-03-01T23:59:59.000Z

237

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

238

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

239

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

240

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 ? Brent C

Christner, Brent C.

Note: This page contains sample records for the topic "ice cube section" 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

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

242

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; BENJAMN MORALES ARNAO

1979-03-23T23:59:59.000Z

243

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

244

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

245

Ice mechanics and risks to offshore structures  

SciTech Connect

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

246

BlackboardSectioningTool Course Sectioning The Sectioning Tool  

E-Print Network (OSTI)

sectioning tool: Consult the online help provided within the sectioning tool Call the OIT Help Desk at (609 by those preferences, select Enable/Configure Student Preference Tool. Need help using the BlackboardBlackboardSectioningTool Course Sectioning 1 The Sectioning Tool The Sectioning Tool is a course

Bou-Zeid, Elie

247

Section 66  

NLE Websites -- All DOE Office Websites (Extended Search)

CFCl CFCl 3 ) (CF 2 Cl 2 ) (CHFCl 2 ) CF 4 CCl 4 (CFCl 3 ) (CF 2 Cl 2 ) (CHFCl 2 ) SF 6 CF 4 CCl 4 Session Papers 277 Figure 1. Spectral absorption cross-sections of CF 4 between 1281 and 1284 cm . The experimental -1 conditions correspond to the surface, 5-km, and 19-km levels of the U.S. Standard Atmosphere. Figure 2. Spectral absorption cross-sections of CCl 4 between 755 and 810 cm . The experimental conditions -1 correspond to the surface, 5-km, and 19-km levels of the U.S. Standard Atmosphere. Laboratory Spectroscopy in Support of the Atmospheric Radiation Measurement Program P. Varanasi Institute for Terrestrial and Planetary Atmospheres The University at Stony Brook Stony Brook, New York There is considerable world-wide interest in the remote sensing of chlorofluorocarbons (CFCs), especially CFC-11

248

Direct Observation of Optically Forbidden Energy Transfer between CuCl Quantum Cubes via Near-Field Optical Spectroscopy  

Science Journals Connector (OSTI)

We report, for the first time, evidence of near-field energy transfer among CuCl quantum cubes using an ultrahigh-resolution near-field optical microscopy and spectroscopy in the near UV region at 15 K. The sample was high-density CuCl quantum cubes embedded in a NaCl matrix. Measured spatial distributions of the luminescence intensities from 4.6-nm and 6.3-nm quantum cubes clearly established anticorrelation features. This is thought to be a manifestation of the energy transfer from the lowest state of exciton in 4.6-nm quantum cubes to the first dipole-forbidden excited state of exciton in 6.3-nm quantum cubes, which is attributed to the resonant optical near-field interaction.

Tadashi Kawazoe; Kiyoshi Kobayashi; Jungshik Lim; Yoshihito Narita; Motoichi Ohtsu

2002-01-25T23:59:59.000Z

249

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

250

SECTION J  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

J-F-1 SECTION J APPENDIX F CRITICAL STAFF Subject Matter Expert Subject Matter Canister Transfer Machine Engineering Waste Package Transfer Trolley Engineering Transport and Emplacement Vehicle Engineering Cask Transfer Trolley Engineering Criticality and Nuclear Engineering Subsurface Thermal Management Engineering Pre-closure Safety Analysis Specialist Waste Package and Drip Shields Engineering Waste Package Closure System Engineering NOG-1 Cranes Engineering Subsurface Design Engineering Structural Seismic Design Engineering Transport, Aging, and Disposal (TAD) interface with repository systems Note: The Contractor shall identify names of at least one individual which shall function in each of the subject matter areas identified above. Qualification requirements for these individuals are

251

SECTION J  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

D-1 D-1 SECTION J APPENDIX D KEY PERSONNEL Name Position Doug Cooper General Manager John Donnell Repository Licensing Lead Al Ebner, PE, PhD Repository Design Lead Steve Piccolo Deputy General Manager Steve White Quality & Performance Assurance Lead George Clare Project Management & Integration Lead Mike Hitchler Preclosure Safety Analysis Lead Contract No.: DE-RW0000005 QA:QA J-D-2 POSITION DESCRIPTIONS OCRWM SPECIFIED KEY PERSONNEL 1. General Manager: Requires 10 years experience as a Senior Manager, responsible for the licensing and/or design and/or operation of a large complex nuclear facility. Must have experience as a

252

The CU Aerospace / VACCO CubeSat High Impulse Propulsion System (CHIPS) offers a miniaturized and  

E-Print Network (OSTI)

· Overall control authority: roll, pitch, yaw, +/- Z · On-orbit update of system parameters, including · System two-failure-tolerant against leakage · Life span: 2+ years from propellant load. · HighThe CU Aerospace / VACCO CubeSat High Impulse Propulsion System (CHIPS) offers a miniaturized

Carroll, David L.

253

HES SIMULATION STUDY USING CUBE DATA FROM MM5 Fengying Sun  

E-Print Network (OSTI)

data are the "truth" atmosphere, which is used to generate simulated HES radiances with the forward square. The cube data includes atmospheric profiles (air temperature, water vapor and ozone) at 101). The atmospheric temperature and moisture profiles are retrieved by eigenvector regression retrieval with all

Li, Jun

254

CubeExplorer: An Evaluation of Interaction Techniques in Architectural Education  

E-Print Network (OSTI)

comparing CubeExplorer and SketchUp in a similar building task. Keywords: Education, 3D modeling, pen, requiring students to focus on constructability. CAD tools such as AutoCAD [1], SketchUp [3], or FormZ [2

Keinan, Alon

255

Strip2CubeFace user%3CU%2B2019%3Es manual.  

SciTech Connect

Commercial Off The Shelf (COTS) software for producing linked virtual tours based on 360 degree panoramas are becoming more and more available. However, the best current products for taking the images, stitching them into 360 degree panoramas, and then linking them together into complex virtual tours require different and incompatible input and output formats. This program is designed to bridge the gap between the iPix Interactive Studio export format, which consists of a single JPEG with the six faces of a cube connected horizontally, with the six individual JPEGs needed to be imported into Panotour Pro software. This report describes how to use the software program Strip2CubeFace, which takes the cube-strip JPEG exported from iPix Studio and coverts it into six JPEGs representing the six cube faces that Panotour Pro imports. As such, it represents a necessary link between the two COTS software programs key to making virtual tours quickly and easily. It becomes one member of the suite of software programs known as %E2%80%9CRaPP-TOURS%E2%80%9D or Rapid Processing of PanoTours Software necessary to simulate managed access and other permission requesting arms control-type training exercises.

Forden, Geoffrey Ethan

2013-03-01T23:59:59.000Z

256

PERFECT POWERS EXPRESSIBLE AS SUMS OF TWO CUBES IMIN CHEN AND SAMIR SIKSEK  

E-Print Network (OSTI)

PERFECT POWERS EXPRESSIBLE AS SUMS OF TWO CUBES IMIN CHEN AND SAMIR SIKSEK To John Cannon and Derek a combination of the modular approach (via Frey curves and Galois representations) with obstructions 11D41, Secondary 11G30. Key words and phrases. Diophantine equations, Frey curves, level

Siksek, Samir

257

Assimilation of Heterogeneous Resources by Utilizing a Unified Format of XML for Constructing OLAP Cubes  

E-Print Network (OSTI)

Cubes Sohail Asghar Faculty of Engineering and Applied Sciences Mohammad Ali Jinnah University Bhutto Institute of Science and Technology Islamabad, Pakistan e-mail: rukhsanahunzai@hotmail.com Simon Fong Faculty of Science and Technology University of Macau Macau SAR e-mail: ccfong@umac.mo Abstract

Fong, Chi Chiu "Simon"

258

Scaling Dynamics of a Massive Piston in a Cube Filled With Ideal Gas: Exact Results  

E-Print Network (OSTI)

Scaling Dynamics of a Massive Piston in a Cube Filled With Ideal Gas: Exact Results N. Chernov1 65th birthday Abstract We continue the study of the time evolution of a system consisting of a piston in a cubical container of large size L filled with an ideal gas. The piston has mass M L2 and undergoes

Lebowitz, Joel

259

Scaling Dynamics of a Massive Piston in a Cube Filled With Ideal Gas: Exact Results  

E-Print Network (OSTI)

Scaling Dynamics of a Massive Piston in a Cube Filled With Ideal Gas: Exact Results N. Chernov 1 of a piston in a cubical container of large size L filled with an ideal gas. The piston has mass M # L 2 heuristically that the motion of the piston and the one particle distribution of the gas satisfy autonomous

260

From Analysis to Interactive Exploration: Building Visual Hierarchies from OLAP Cubes  

E-Print Network (OSTI)

of visual tools available to end-users. The explorative framework of our proposed interface consists. The navigation interface allows users to pursue arbitrary disaggregation paths within single data cubes and, more by a disaggregation step, whereas the nodes display the specified subset of measures, either as plain numbers

Reiterer, Harald

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


261

The H-Cube Project: Hydrodynamics, Heterogeneity and Homogenization in CO2 storage modeling  

E-Print Network (OSTI)

. Audigane, BRGM, E. Mouche, CEA, S. Viseur, CEREGE, D. Guérillot, TERRA 3E And the H-CUBE team Key words-scaling processes We propose to assess the buoyant forces on the CO2 and brine vertical migration of heterogeneity field distribution on the same 3D static earth model appropriate ranking measures of the static

Paris-Sud XI, Université de

262

Section 19  

NLE Websites -- All DOE Office Websites (Extended Search)

Observations and Applications of Data Taken with the Observations and Applications of Data Taken with the Cloud Profiling Radar System J. M. Firda, S. M. Sekelsky, S. P. Lohmeier, R. E. McIntosh Microwave Remote Sensing Laboratory, University of Massachusetts Amherst, Massachusetts Introduction During the past year, the University of Massachusetts' Cloud Profiling Radar System (CPRS) team has been active in collecting and processing data. Participation in several field campaigns has produced new and interesting data sets. A classification software was also developed using rule-based techniques and neural networks to identify cloud particles. This paper describes the activities of CPRS from March of 1995 to March of 1996. In the first section, involvement in field experiments is briefly described. This is followed by a

263

Section Number:  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

QA:QA J-E-1 SECTION J APPENDIX E LIST OF APPLICABLE DIRECTIVES Pursuant to the contract clause entitled, "Laws, Regulations, and DOE Directives," the following list of directives is applicable to this contract. List A Pursuant to the contract clause entitled, "Laws, Regulations, and DOE Directives," the Contractor shall comply with the requirements of applicable Federal, State, and local laws and regulations, unless relief has been granted in writing by the appropriate regulatory agency. Omission of any applicable law or regulation from this list does not affect the obligation of the contractor to comply with such law or regulation. Laws & Regulations Title 10 CFR Part 2 Rules of Practice for Domestic Licensing Proceedings and Issuance of Orders

264

SECTION J  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

H-1 H-1 SECTION J APPENDIX H CONTRACT GUIDANCE FOR PREPARATION OF DIVERSITY PLAN This Guidance is to assist the Contractor in understanding the information being sought by the Department for each of the Diversity elements and where these issues may already be addressed in the contract. To the extent these issues are already addressed in the contract, the Contractor need only cross reference the location. Contractor's Workforce The Department's contracts contain clauses on Equal Employment Opportunity (EEO) and Affirmative Action (AA). The Plan may discuss how the contractor has or plans to establish and maintain result-oriented EEO and AA programs in accordance with the requirements of these clauses, and how the contractor's organization includes

265

Section J  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

M-1 M-1 Section J Appendix M Key Design, Licensing and Site Management M&O Milestone Chart Activity Planned Date Develop and Submit CD-2 (25%-30%) 08/2009 Submission of Construction Performance Specifications - Balance of Plant Support Facilities (OCRWM Start of Construction 3/2012) TBD Submission of Construction Performance Specifications - Initial Handling Facility (IHF) (OCRWM Start of Construction for IHF: 9/2013) TBD Submission of Construction Performance Specifications - Wet Handling Facility (WHF) (OCRWM Start of Construction for WHF: 12/2012) TBD Submission of Construction Performance Specifications - Canister Receipt and Closure Facility (CRCF) (OCRWM Start of Construction for CRCF-1: 10/2011) TBD Submission of Construction Performance Specifications - Panel 1

266

Mantle viscosity and ice-age ice sheet topography  

SciTech Connect

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

267

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":""}]}

268

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

269

Solar Energetic Particle Spectrum on 13 December 2006 Determined by IceTop  

SciTech Connect

The IceTop air shower array now under construction at the South Pole as the surface component of the IceCube neutrino telescope (Achterberg et al. 2006) detected an unusual near-solar-minimum Ground Level Enhancement (GLE) after a solar flare on 13 December 2006. Beginning at 0220 UT, the 4B class flare occurred at solar coordinates S06 W24, accompanied by strong (X3.4) X-ray emission and type II and IV radio bursts. The LASCO coronagraph on the SOHO spacecraft observed a halo CME launch from the Sun at {approx} 0225 UT with speed estimated to be {approx} 1770 km/s. We have begun (Bieber et al. 2007) a comprehensive analysis of the propagation of solar energetic particles in this event. However the focus of this Letter is the new and unique ability of IceTop to derive the energy spectrum of these particles in the multi-GeV regime from a single detector with a well defined viewing direction. When completed, IceTop will have approximately 500 square meters of ice Cherenkov collecting area arranged in an array of 80 stations on a 125 m triangular grid to detect air showers from one PeV to one EeV. Each station consists of two, two meter diameter tanks filled with ice to a depth of 90 cm. Tanks are instrumented with two Digital Optical Modules (DOM) operated at different gain settings to provide appropriate dynamic range to cover both large and small air showers. Each DOM contains a 10 inch photomultiplier and an advanced readout system capable of digitizing the full waveform. For historical reasons, the two discriminator counting rates recorded in each DOM are termed SPE (Single Photo Electron), and MPE (Multi Photo Electron). In the present analysis the SPE threshold corresponds approximately to 20 photoelectrons (PE), and the MPE threshold to 100 PE. Due to the high altitude (2835m) and the nearly zero geomagnetic cutoff at the South Pole, secondary particle spectra at the detector retain a significant amount of information on the spectra of the primary particles. In a thin, ionization detector these secondary particles either would not interact, or would produce virtually indistinguishable signals. This is not the case in the thick Ice-Top detector, where a traversing muon produces 130 PE and the typical electron only 15 PE. Signal amplitude therefore carries information about the composition and spectra of the incident particles, albeit integrated over broad regions of the spectrum. In particular, differences in counting rates of discriminators at different thresholds allow us to infer the particle spectrum incident at the top of the atmosphere.

IceCube Collaboration; Klein, Spencer

2008-10-11T23:59:59.000Z

270

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":""}]}

271

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

SciTech Connect

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

272

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

273

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

274

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

275

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

276

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

277

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

278

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.

279

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

280

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

Note: This page contains sample records for the topic "ice cube section" 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

Paleotopography of glacial-age ice sheets  

SciTech Connect

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

282

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

283

Ice-Sheet Response to Oceanic Forcing  

Science Journals Connector (OSTI)

...regional-scale ice-ocean simulations suggests that the state-of-Texas...ice shelfs 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

284

Testing the attitude determination and control of a CubeSat with hardware-in-the-loop  

E-Print Network (OSTI)

This thesis presents a methodology for testing the attitude determination and control of a CubeSat within a constrained environment. This approach first evaluates the concept of operations of the satellite mission, then ...

Quadrino, Meghan Kathleen

2014-01-01T23:59:59.000Z

285

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

286

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

287

Three-Dimensional Nonlinear Lattices: From Oblique Vortices and Octupoles to Discrete Diamonds and Vortex Cubes  

Science Journals Connector (OSTI)

We construct a variety of novel localized topological structures in the 3D discrete nonlinear Schrdinger equation. The states can be created in Bose-Einstein condensates trapped in strong optical lattices and crystals built of microresonators. These new structures, most of which have no counterparts in lower dimensions, range from multipole patterns and diagonal vortices to vortex cubes (stack of two quasiplanar vortices) and diamonds (formed by two orthogonal vortices).

R. Carretero-Gonzlez; P. G. Kevrekidis; B. A. Malomed; D. J. Frantzeskakis

2005-05-23T23:59:59.000Z

288

Persistent spectral-hole-burning spectroscopy of CuCl quantum cubes  

Science Journals Connector (OSTI)

A persistent spectral-hole-burning (PSHB) phenomenon was successfully applied to the precise site-selective spectroscopy of CuCl quantum dots embedded in NaCl crystals. In the PSHB spectra of CuCl quantum dots, a resonantly burned hole and lower-energy satellite holes were observed. These satellite holes are supposed to originate from hole burning of the ground states, which results from site-selective excitation of the corresponding excited states of excitons confined in CuCl quantum dots. Energy relation between the resonantly burned hole and each satellite hole is well explained by the simple concept of a particle in a quantum cube with an infinitely high potential barrier. However, actual quantum dots are considered to be a little deviated from cubes, resulting in the violation of the optical selection rule in quantum cubes. A cubic-shaped quantum-dot model is almost consistent with oscillatory fine structures observed in the Z3 exciton absorption band. Its spectral decomposition into the ground state and the first excited state of excitons was made, and showed that the first excited state is in majority at the higher-energy region of the Z3 exciton absorption band. This result was supported by the photoluminescence spectrum of the Z3 exciton.

Naru Sakakura and Yasuaki Masumoto

1997-08-15T23:59:59.000Z

289

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

290

Hydrogen ICE Vehicle Testing Activities  

SciTech Connect

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 Energys 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

291

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 agedepth 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 glacialinterglacial 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 3.54.5m.

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

2005-01-01T23:59:59.000Z

292

FAFCO Ice Storage test report  

SciTech Connect

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

293

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

294

Climate, Ocean and Sea Ice Modeling (COSIM)  

NLE Websites -- All DOE Office Websites (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

295

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

296

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

297

IceT users' guide and reference.  

SciTech Connect

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

298

IceT users' guide and reference.  

SciTech Connect

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

299

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

300

Viscosity of interfacial water regulates ice nucleation  

SciTech Connect

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

Note: This page contains sample records for the topic "ice cube section" 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

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.

302

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

303

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

304

City of Eagan ?Civic Ice Arena Renovation  

Energy.gov (U.S. Department of Energy (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.

305

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

306

Phase behavior of colloidal superballs: Shape interpolation from spheres to cubes  

Science Journals Connector (OSTI)

The phase behavior of hard superballs is examined using molecular dynamics within a deformable periodic simulation box. A superballs interior is defined by the inequality |x|2q+|y|2q+|z|2q?1, which provides a versatile family of convex particles (q?0.5) with cubelike and octahedronlike shapes as well as concave particles (q<0.5) with octahedronlike shapes. Here, we consider the convex case with a deformation parameter q between the sphere point (q=1) and the cube (q=?). We find that the asphericity plays a significant role in the extent of cubatic ordering of both the liquid and crystal phases. Calculation of the first few virial coefficients shows that superballs that are visually similar to cubes can have low-density equations of state closer to spheres than to cubes. Dense liquids of superballs display cubatic orientational order that extends over several particle lengths only for large q. Along the ordered, high-density equation of state, superballs with 1

Robert D. Batten; Frank H. Stillinger; Salvatore Torquato

2010-06-02T23:59:59.000Z

307

Parallel algorithms for the maxima problem using an N-cube processor configuration  

E-Print Network (OSTI)

problem for a set of N d- dimensional points using an N ? cube processor conf iguration. Algorithms for the two- and three? dimensional problems are developed first. These algorithms are then extended to solve the maxima problem in higher dimensions... the maxima problem. The maxima problem is def ined in the following statements: Let S be a set of N d-dimensional points and let x(i, s) represent the st coordinate of i, where 1 & s & d. Let i and j be points contained in ST The point i is said...

Coffman, Sarah Wilson

2012-06-07T23:59:59.000Z

308

Dimensional Crossover of the Fundamental-Measure Functional for Parallel Hard Cubes  

Science Journals Connector (OSTI)

We present a regularization of the recently proposed fundamental-measure functional for a mixture of parallel hard cubes. The regularized functional is shown to have correct dimensional crossovers to any smaller dimension, thus allowing its use to study highly inhomogeneous phases (such as the solid phase). Furthermore, it is shown how the functional of the slightly more-general model of parallel hard parallelepipeds can be obtained using the zero-dimensional functional as a generating functional. Extensions to the multicomponent system, a restricted-orientation model, and mixtures or prallel hard cylinders are also given.

Jos A. Cuesta and Yuri Martnez-Ratn

1997-05-12T23:59:59.000Z

309

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

310

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

SciTech Connect

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

311

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...

312

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

313

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...

314

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...

315

Comparative feeding value of a cubed alfalfa:corn plant product as an exclusive diet for exercising horses  

E-Print Network (OSTI)

COMPARATIVE FEEDING VALUE OF A CUBED ALFALFA:CORN PLANT PRODUCT AS AN EXCLUSIVE DIET FOR EXERCISING HORSES A Thesis by GEORGIA ANN YOUNGLOVE Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 1993 Major Subject: Animal Science COMPARATIVE FEEDING VALUE OF A CUBED ALFALFA:CORN PLANT PRODUCT AS AN EXCLUSIVE DIET FOR EXERCISING HORSES A Thesis by GEORGIA ANN YOUNGLOVE Approved as to style...

Younglove, Georgia Ann

2012-06-07T23:59:59.000Z

316

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

NLE Websites -- All DOE Office Websites (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

317

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

NLE Websites -- All DOE Office Websites (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

318

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

319

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

320

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

Note: This page contains sample records for the topic "ice cube section" 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

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

322

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

323

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

NLE Websites -- All DOE Office Websites (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...

324

Application of the Cubed-Sphere Grid to Tilted Black-Hole Accretion Disks  

SciTech Connect

In recent work we presented the first results of global general relativistic magnetohydrodynamic (GRMHD) simulations of tilted (or misaligned) accretion disks around rotating black holes. The simulated tilted disks showed dramatic differences from comparable untilted disks, such as asymmetrical accretion onto the hole through opposing 'plunging streams' and global precession of the disk powered by a torque provided by the black hole. However, those simulations used a traditional spherical-polar grid that was purposefully underresolved along the pole, which prevented us from assessing the behavior of any jets that may have been associated with the tilted disks. To address this shortcoming we have added a block-structured 'cubed-sphere' grid option to the Cosmos++ GRMHD code, which will allow us to simultaneously resolve the disk and polar regions. Here we present our implementation of this grid and the results of a small suite of validation tests intended to demonstrate that the new grid performs as expected. The most important test in this work is a comparison of identical tilted disks, one evolved using our spherical-polar grid and the other with the cubed-sphere grid. We also demonstrate an interesting dependence of the early-time evolution of our disks on their orientation with respect to the grid alignment. This dependence arises from the differing treatment of current sheets within the disks, especially whether they are aligned with symmetry planes of the grid or not.

Fragile, P C; Lindner, C C; Anninos, P; Salmonson, J D

2008-09-24T23:59:59.000Z

325

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 NorwegianBritishSwedish Antarctic Expedition, among others. In the companion Part II of this work (Faria etal., 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.

Srgio H. Faria; Ilka Weikusat; Nobuhiko Azuma

2014-01-01T23:59:59.000Z

326

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

327

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

328

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

329

Dynamics of a self-avoiding polymer chain in slit, tube, and cube confinements  

Science Journals Connector (OSTI)

Monte Carlo simulations are presented for the observation of the dynamics of a self-avoiding polymer in three types of confinement: slit, tube, and cube. We pay special attention to the parameter regime where the characteristic confinement dimension is smaller than the radius of gyration of the unconfined polymer. On the basis of the bond-fluctuation model, we measured the rotation time of the end-to-end vector of the polymer, the diffusion time for the center of the polymer to move a distance comparable to the root mean square end-to-end distance, and the looping time for the ends of the polymer to approach each other from an open position. As functions of the confinement width and polymer length, these three time scales are discussed in light of scaling theories.

Ting Cui; Jiandong Ding; Jeff Z. Y. Chen

2008-12-29T23:59:59.000Z

330

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

331

Nailing Down Ice in a Cloud Model  

NLE Websites -- All DOE Office Websites (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

332

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

333

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

334

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

335

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

336

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

337

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

338

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...

339

Observations of the Askaryan Effect in Ice  

SciTech Connect

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

340

Microsoft Word - IceMountainFinal.docx  

NLE Websites -- All DOE Office Websites (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...

Note: This page contains sample records for the topic "ice cube section" 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

Limits on a muon flux from Kaluza-Klein dark matter annihilations in the Sun from the IceCube 22-string detector  

E-Print Network (OSTI)

Limits on a muon flux from Kaluza-Klein dark matterAPS/123-QED Limits on a muon ?ux from Kaluza-Klein dark23, 2009) A search for muon neutrinos from Kaluza-Klein dark

Abbasi, R.

2010-01-01T23:59:59.000Z

342

Search for high-energy muon neutrinos from the "naked-eye" GRB080319B with the IceCube neutrino telescope  

E-Print Network (OSTI)

one of the brightest gamma-ray bursts (GRBs) ever observed.cosmic high-energy neutrinos, gamma-ray-burst, GRB 080319BLong duration gamma-ray bursts (GRBs) are thought to

Abbasi, R.; IceCube Collaboration

2009-01-01T23:59:59.000Z

343

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

344

Spin-One Ising Model for Ice VIIPlastic Ice Phase Transitions  

Science Journals Connector (OSTI)

We propose a spin model compatible with ice VIIplastic ice phase transitions and critical phenomena discovered recently by computer simulations. The BlumeCapel 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

345

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

346

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

347

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

348

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--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

349

Section 42: Monitoring  

NLE Websites -- All DOE Office Websites (Extended Search)

using techniques that do not jeopardize the containment of waste in the disposal system. Ten monitoring parameters were identified in an analysis performed to fulfill the section...

350

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

351

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

352

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

353

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

354

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

355

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

356

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

357

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

358

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

NLE Websites -- All DOE Office Websites (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...

359

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

360

Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality  

Alternative Fuels and Advanced Vehicles Data Center (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

Note: This page contains sample records for the topic "ice cube section" 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

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

362

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.

363

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

364

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

365

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

366

Covered Product Category: Water-Cooled Ice Machines  

Energy.gov (U.S. Department of Energy (DOE))

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

367

An update on land-ice modeling in the CESM  

SciTech Connect

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

368

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

369

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

370

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

371

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

372

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

373

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

374

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 iceocean-only ...

Edward Blanchard-Wrigglesworth; Cecilia M. Bitz

2014-11-01T23:59:59.000Z

375

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

376

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

377

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

378

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

379

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.

380

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

Note: This page contains sample records for the topic "ice cube section" 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

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

382

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

383

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

384

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

385

17O Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Current as of 05152012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 2010SE11 17O(p, ): nuclear excitation function 0 - 0.7 1 06222011 1973RO03...

386

EMPLOYMENT Advertising Section  

Science Journals Connector (OSTI)

EMPLOYMENT Advertising Section ... "Situations wanted" advertisements will be classified by type of chemistry (analytical, biochemistry, etc.). ... State ACS membership status and mail advertisements to Chemical & Engineering News, Classified Advertising, 25 Sylvan Rd. ...

1981-09-14T23:59:59.000Z

387

11B Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Current as of 05152012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 2004RO27, 2004SP03 11B(p, ): deduced , S-factor Ecm 0 - 1 X4 11072012...

388

18O Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

, X) (Current as of 05142012) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 2003DA19 18O(, ): deduced resonance strengths 470 - 770 keV X4 02132012...

389

12C Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

, X) (Current as of 05142012) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 2009MA70 12C(, 0): 0 - 2.27 X4 05012012 1997KU18 12C(, ): analyzed...

390

7Li Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

, X) (Current as of 05142012) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 2004GY02 7Li(, ): deduced absolute resonance strengths 810 - 820 keV X4 02...

391

7Li Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Current as of 05152012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 1997GO13 7Li(pol. p, ): total , S-factor for capture to third-excited state 0 -...

392

4He Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

4He(, X) (Current as of 05142012) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 1978HI04 4He(, ): elastic scattering excitation function 32.6 - 35.4 ...

393

15N Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

, X) (Current as of 05142012) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 2002WI18 15N( ): 461 - 2642 keV X4 09122011 1997WI12 15N( ): 0.65...

394

6Li Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

, X) (Current as of 01212015) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 1985NE05 6Li(, ): thick target yield resonance X4 02152012 1966FO05...

395

19F Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

, X) (Current as of 01212015) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 2008UG01 19F(, p): yield curves, 792 - 1993 keV X4 09142011 2005UG04...

396

9Be Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

, X) (Current as of 01212015) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 1994WR01 9Be(, n): , thick target yield, deduced S-factor Ecm 0.16 - 1.87...

397

11B Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

, X) (Current as of 01212015) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 1991WA02 11B(, n): thick-target yield of E 411, 605 and 606 keV resonance...

398

20Ne Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

, X) (Current as of 01212015) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 1983SC17 20Ne(, ): deduced S-factor of capture 0.55 - 3.2 X4 09152011...

399

10B Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

, X) (Current as of 01212015) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 1992MC03 10B(, ): relative to Rutherford scattering 1 - 3.3 X4 05022012...

400

3He Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

, X) (Current as of 05142012) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 1982KR05 3He(, ): Ecm 107 - 1266 keV X4 01052012 1969NA24 3He(, ):...

Note: This page contains sample records for the topic "ice cube section" 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

14N Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

4N(, X) (Current as of 05142012) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 1971CO27 14N(, ): thick target yield 0.5 - 1.2 1 08042011 2000GO43...

402

Cross-Section Measurement  

NLE Websites -- All DOE Office Websites (Extended Search)

Cross-Section Measurement of 2 H(n,np)n at 16 MeV in Symmetric Constant Relative Energy Configurations Alexander Hoff Couture A dissertation submitted to the faculty of the...

403

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.

404

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

405

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

406

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

407

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

408

Cross-section  

NLE Websites -- All DOE Office Websites (Extended Search)

Cross-section Cross-section formulae for specific processes 1 39. CROSS-SECTION FORMULAE FOR SPECIFIC PROCESSES Revised September 2005 by R.N. Cahn (LBNL). Setting aside leptoproduction (for which, see Sec. 16), the cross sections of primary interest are those with light incident particles, e + e - , γγ, qq, gq , gg, etc., where g and q represent gluons and light quarks. The produced particles include both light particles and heavy ones - t, W , Z, and the Higgs boson H. We provide the production cross sections calculated within the Standard Model for several such processes. 39.1. Resonance Formation Resonant cross sections are generally described by the Breit-Wigner formula (Sec. 16 of this Review). σ(E) = 2J + 1 (2S 1 + 1)(2S 2 + 1) 4π k 2 Γ 2 /4 (E - E 0 ) 2 + Γ 2 /4 B in B out , (39.1) where E is the c.m. energy, J is the spin of the resonance, and the number of polarization states of the two incident particles

409

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

E-Print Network (OSTI)

models (SSA, AHySSA) 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

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 (128kaBP). 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 etal. (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 8kaBP to present are significantly reduced compared to the original analysis. Prior to 8kaBP, 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

POLICY SECTIONS POLICY OFFICE  

E-Print Network (OSTI)

POLICY SECTIONS POLICY OFFICE POLICIES FORMS PROCEDURES UNIVERSITY POLICY #12;guide to WRITING POLICIES Administrative policies align opera- tions, set behavior expectations across the University system and communicate policy roles and responsibilities. You, as the policy owner or writer, have the important task

Minnesota, University of

412

16O Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

6O(, X) (Current as of 05142012) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 1971TO06 16O(, ): 0.85 - 1.8 X4 09152011 1953CA44 16O(, ): 0.94...

413

14C Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

4C(p, X) (Incomplete) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 1969SI04 14C(p, ): -rays yield for 230 - 690 keV E 2.8 MeV 08152013 1990GO25 14C(p,...

414

6Li Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

6Li(p, X) (Current as of 05152012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 2004TU02 6Li(p, ): coincidence yields, deduced S-factors low 1, S-factors from...

415

9Be Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Current as of 05152012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 1997ZA06 9Be(p, ), (p, d): S-factor 16 - 390 keV X4 01232013 1973SI27 9Be(p,...

416

16O Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Incomplete) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 1973MC12 16O(p, ): threshold - 7.7 X4 10172012 1981DY03 16O(p, p): for production of...

417

18O Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Current as of 05152012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 2008LA06 18O(p, ): deduced S-factor Ecm 0 - 1.5 46 12032012 1990CH32...

418

20Ne Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Current as of 05152012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 1981DY03 20Ne(p, p'): for production of -rays threshold - 23 1.63-MeV -rays...

419

15N Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Current as of 05152012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 1990WA10 15N(p, n): < 30 X4 04262012 1982RE06 15N(p, ): 78 - 810 keV X4...

420

11C Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

C(p, X) (Current as of 05152012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 2003LI51 11C(p, ): deduced S-factor low X4 09122011 2003TA02 11C(p, ):...

Note: This page contains sample records for the topic "ice cube section" 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

19F Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Incomplete) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 1990WA10 19F(p, n): < 30 X4 04262012 2008CO03 19F(p, ): Ecm 200 - 700 keV X4 0514...

422

4He Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Incomplete) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 1974KR07 4He(p, p): 0.5 - 3 X4 10232014 2004PU02 4He(p, p): ( 128.7) 1.2 - 5.2 X4 10...

423

3He Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Current as of 05152012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 1980BE06 3He(pol. p, p): 0.3 - 1.0 X4 10302014 1964IM03 3He(p, ): deduced ...

424

17O Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

, X) (Current as of 05142012) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 1973BA10 17O(, n): neutron yields with target thickness 0.9 - 5.3 2.5 keV, 6...

425

3H Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

H(, X) (Current as of 05142012) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 2001TO07 3H(, ): deduced S-factor Ecm 0.05 - 0.8 X4 01092012 1994BR25...

426

14N Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Incomplete) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 2003MU12 14N(p, ): deduced astrophysical S-factors < 600 keV X4 05062013 1990WA10 14N(p, n):...

427

12C Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Current as of 05152012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 2001NE15 12C(p, ): , deduced S(E) ratio < 160 keV X4 10282014 1993CH02 12C(p,...

428

10B Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Current as of 05152012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 2010LA11 10B(p, ): deduced S(E) E(cm) 0 - 0.15 1 11302011 1993AN06 10B(p, ):...

429

10Be Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

Be(p, X) (Current as of 05152012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 1970GO04 10Be(p, 0): 0.6 - 6.3 0, 90 06052012 1987ERZY...

430

13C Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

p, X) (Current as of 05152012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 2001NE15 13C(p, ): , deduced S(E) ratio < 160 keV X4 09122011 1994KI02 13C(p,...

431

13C Cross Section  

NLE Websites -- All DOE Office Websites (Extended Search)

3C(, X) (Current as of 01212015) NSR Reaction E (MeV) Cross Section File X4 Dataset Date Added 2006JO11 13C(, n): deduced S(E) 0 - 1 from (1993BR17), from (1993DR08) X4...

432

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

DOE Data Explorer (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

433

ICE Cleaning Test Report.PDF  

NLE Websites -- All DOE Office Websites (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

434

Phase Diagram and Structural Diversity of a Family of Truncated Cubes: Degenerate Close-Packed Structures and Vacancy-Rich States  

Science Journals Connector (OSTI)

Using MonteCarlo simulations and free-energy calculations, we determine the phase diagram of a family of truncated hard cubes, where the shape evolves smoothly from a cube via a cuboctahedron to an octahedron. A remarkable diversity in crystal phases and close-packed structures is found, including a fully degenerate crystal structure, several plastic crystals, as well as vacancy-stabilized crystal phases, all depending sensitively on the precise particle shape. Our results illustrate the intricate relation between phase behavior and building-block shape, and can guide future experimental studies on polyhedral-shaped nanoparticles.

Anjan P. Gantapara; Joost de Graaf; Ren van Roij; Marjolein Dijkstra

2013-07-01T23:59:59.000Z

435

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

436

ICE LINES IN CIRCUMBINARY PROTOPLANETARY DISKS  

SciTech Connect

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

437

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

438

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

439

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

440

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

Note: This page contains sample records for the topic "ice cube section" 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

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

442

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

NLE Websites -- All DOE Office Websites (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!

443

ARM - Publications: Science Team Meeting Documents: Investigation of Ice  

NLE Websites -- All DOE Office Websites (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

444

STATEMENT OF WORK (SOW) TEMPLATE FOR ICE SUPPORT CONTRACTOR  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

445

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

446

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 1My. 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

447

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

448

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

449

Argonne Lab Director Peter Littlewood accepts Ice Bucket Challenge...  

NLE Websites -- All DOE Office Websites (Extended Search)

Argonne Lab Director Peter Littlewood accepts Ice Bucket Challenge Share Browse By - Any - Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering...

450

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

451

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

NLE Websites -- All DOE Office Websites (Extended Search)

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

452

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 34h 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

453

ARM-UAV TWP-ICE Activities and Data  

NLE Websites -- All DOE Office Websites (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...

454

Covered Product Category: Air-Cooled Ice Machines  

Energy.gov (U.S. Department of Energy (DOE))

The Federal Energy Management Program (FEMP) provides acquisition guidance for air-cooled ice machines, which are covered by the ENERGY STAR program.

455

Sandia National Laboratories: Ice-Sheet Simulation Code Matures...  

NLE Websites -- All DOE Office Websites (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...

456

Team advances understanding of the Greenland Ice Sheet's meltwater...  

NLE Websites -- All DOE Office Websites (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...

457

Reducing uncertainty in high-resolution sea ice models.  

SciTech Connect

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

458

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

459

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.

460

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

Note: This page contains sample records for the topic "ice cube section" 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

E-Print Network 3.0 - aircraft icing training Sample Search Results  

NLE Websites -- All DOE Office Websites (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...

462

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

463

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

464

Part III - Section J  

National Nuclear Security Administration (NNSA)

H H DIVERSITY PLAN GUIDANCE To Be Updated during Transition With regard to the Contract Section I Clause entitled "Diversity Plan", this Appendix provides guidance to assist the Contractor in understanding the information being sought by the Department for each of the clause's Diversity elements. If the Contractor's current policy or procedure already addresses the following elements, the Contractor need only provide a copy of the policy or procedure to the Contracting Officer and identify the applicable policy or procedure and applicable page number(s). Work Force This Contract includes clauses on Equal Employment Opportunity (EEO) and Affirmative Action (AA). The Contractor's Diversity Plan should describe the means by which the

465

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

466

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

467

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

468

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

469

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

470

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

471

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

472

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

473

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

474

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

475

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

476

Trigonal ice crystals in Earths 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

477

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

478

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

479

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.

480

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

Note: This page contains sample records for the topic "ice cube section" 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

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

482

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

483

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

484

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.

485

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

486

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

487

Operations of a Radioisotope-based Propulsion System Enabling CubeSat Exploration of the Outer Planets  

SciTech Connect

Exploration to the outer planets is an ongoing endeavor but in the current economical environment, cost reduction is the forefront of all concern. The success of small satellites such as CubeSats launched to Near-Earth Orbit has lead to examine their potential use to achieve cheaper science for deep space applications. However, to achieve lower cost missions; hardware, launch and operations costs must be minimized. Additionally, as we push towards smaller exploration beds with relative limited power sources, allowing for adequate communication back to Earth is imperative. Researchers at the Center for Space Nuclear Research are developing the potential of utilizing an advanced, radioisotope-based system. This system will be capable of providing both the propulsion power needed to reach the destination and the additional requirements needed to maintain communication while at location. Presented here are a basic trajectory analysis, communication link budget and concept of operations of a dual-mode (thermal and electric) radioisotope-based propulsion system, for a proposed mission to Enceladus (Saturnian icy moon) using a 6U CubeSat payload. The radioisotope system being proposed will be the integration of three sub-systems working together to achieve the overall mission. At the core of the system, stored thermal energy from radioisotope decay is transferred to a passing propellant to achieve high thrust useful for quick orbital maneuvering. An auxiliary closed-loop Brayton cycle can be operated in parallel to the thrusting mode to provide short bursts of high power for high data-rate communications back to Earth. Additionally, a thermal photovoltaic (TPV) energy conversion system will use radiation heat losses from the core. This in turn can provide the electrical energy needed to utilize the efficiency of ion propulsion to achieve quick interplanetary transit times. The intelligent operation to handle all functions of this system under optimized conditions adds to the complexity of the mission architecture.

Dr. Steven Howe; Nathan Jerred; Troy Howe; Adarsh Rajguru

2014-05-01T23:59:59.000Z

488

Section A Introduction to Review Section A Introduction to Review  

E-Print Network (OSTI)

with Review. Separate user guides for e-Recruitment Plan and Recruit are available on the AP On-Line UserSection A Introduction to Review A-1 Section A ­ Introduction to Review This section includes: · About AP On-Line (this page) · Accessing Review (this page) · Assignment of roles in Review (page A-2

Tsien, Roger Y.

489

Fire in the Ice, Spring 2005  

NLE Websites -- All DOE Office Websites (Extended Search)

Marine Multi-Component Marine Multi-Component Seismology ............................ 1 Discovery of Possible Gas Hydrate Features ................... 5 Monitoring Station Update ..... 8 Announcements .................. 10 * Research Cruise Completed * Advisory Committee Meeting * Hot Ice Project Reports * Norway ICGH Meeting * Simulator Publicly Released * TOUGH-Fx/HYDRATE V 2.4 * AAPG Committee to Meet Spotlight on Research ........ 12 Scott Dallimore CONTACT POINT Ray Boswell National Energy Technology Laboratory (304) 285-4541 (304) 285-4216 fax Ray.Boswell@netl.doe.gov The Fire in the Ice Newsletter is also available online at our website www.netl.doe.gov/scngo/ NaturalGas/hydrates/index.html T H E N A T I O N A L E N E R G Y T E C H N O L O G Y L A B O R A T O R Y M E T H A N E H Y D R A T E N E W S L E T T E R Vol. 5, Iss. 2 ○ ○ ○ ○ ○

490

Magnetic charge crystals imaged in artificial spin ice  

NLE Websites -- All DOE Office Websites (Extended Search)

Magnetic charge crystals imaged in artificial spin ice Magnetic charge crystals imaged in artificial spin ice Magnetic charge crystals imaged in artificial spin ice Potential data storage and computational advances could follow August 27, 2013 Potential data storage and computational advances could follow A 3-D depiction of the honeycomb artificial spin ice topography after the annealing and cooling protocols. The light and dark colors represent the north and south magnetic poles of the islands. Image by Ian Gilbert, U. of I. Department of Physics and Frederick Seitz Materials Research Laboratory Contact Nancy Ambrosiano Communications Office (505) 667-0471 Email Siv Schwink U. Illinois (217) 300-2201 Email "The emergence of magnetic monopoles in spin ice systems is a particular case of what physicists call fractionalization, or deconfinement of

491

Ground-State Structures of Ice at High-Pressures  

E-Print Network (OSTI)

\\textit{Ab initio} random structure searching based on density functional theory is used to determine the ground-state structures of ice at high pressures. Including estimates of lattice zero-point energies, ice is found to adopt three novel crystal phases. The underlying sub-lattice of O atoms remains similar among them, and the transitions can be characterized by reorganizations of the hydrogen bonds. The symmetric hydrogen bonds of ice X and $Pbcm$ are initially lost as ice transforms to structures with symmetries $Pmc2_1$ (800 - 950 GPa) and $P2_1$ (1.17 TPa), but they are eventually regained at 5.62 TPa in a layered structure $C2/m$. The $P2_1 \\rightarrow C2/m$ transformation also marks the insulator-to-metal transition in ice, which occurs at a significantly higher pressure than recently predicted.

McMahon, Jeffrey M

2011-01-01T23:59:59.000Z

492

Section 180(c)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

: : Questions for Discussion * Funding Allocation Method: - Formula or needs-based? Does either choice impact a set-aside? * Eligibility: - What happens if a Tribe has no emergency response or law enforcement capability? Can they be eligible for Section 180(c) funds? Funding Allocation Method * What we've heard: - Population is not an appropriate measure for funds - Funding should protect all aboriginal lands - Don't use the ½ mile of a route measure used in the EIS - Consider a set-aside of funds for Tribes, higher than the 3% used by DOT's HMEP assistance program. Funding Allocation Method * Formula Approach - Factors in a formula should measure risk and need - What factors might be appropriate? - How can a formula account for varying levels of tribal authority over a route? For example,

493

SECTION A: STUDENT INFORMATION ______________________________________________________________________ 93#____________________________________  

E-Print Network (OSTI)

SECTION A: STUDENT INFORMATION # __________________@_________________________ (______)______________ ________/________/_________ Email Address Phone # Effective Date of this Request SECTION B: ADDITIONAL INFORMATION The items listed below are designated as "Directory Information" and may be released for any purpose at the discretion

Swaddle, John

494

Ice in Clouds ExperimentLayer 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 ?32C 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

495

Estimating the Sea Ice Compressive Strength from Satellite-Derived Sea Ice Drift and NCEP Reanalysis Data  

Science Journals Connector (OSTI)

Satellite-derived sea ice drift maps and sea level pressure from reanalysis data are used to infer upper and lower bounds on the large-scale compressive strength of Arctic sea ice. To this end, the two datasets are searched for special situations ...

L-B. Tremblay; M. Hakakian

2006-11-01T23:59:59.000Z

496

Breaking the ice: de-icing power transmission lines with high-frequency, high-voltage excitation  

E-Print Network (OSTI)

Breaking the ice: de-icing power transmission lines with high-frequency, high-voltage excitation of this work in other works must be obtained from the IEEE. #12;CING OF POWER TRANSMISSION lines during winter that applies 33-kV, 100-kHz power. TheoverallsystemisillustratedinFigure1.Itcouldbede- ployed in two different

497

Fire in the Ice, Summer 2004  

NLE Websites -- All DOE Office Websites (Extended Search)

R R Vol. 4, Iss. 3 ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ CONTENTS Gulf of Mexico Remote Observatory Update ............... 1 Hydrate Decomposition Studies at USGS .................... 5 NETL's HP View Cell Operational .......................... 10 Announcements .................. 13 * AAPG Hedberg Conference * JIP Drilling Delayed * TOUGH-Fx/HYDRATE v1.0 * Advisory Committee Meeting * Anaximander project Spotlight on Research ........ 16 Dr. Keith Kvenvolden CONTACT POINT Ray Boswell National Energy Technology Laboratory (304) 285-4541 (304) 285-4469 fax Ray.Boswell@netl.doe.gov The Fire in the Ice Newsletter is

498

Fire in the Ice, Fall 2004  

NLE Websites -- All DOE Office Websites (Extended Search)

4 4 ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ CONTENTS AAPG Hedberg Research Conference ............................ 1 Oak Ridge Facilities .............. 4 Relic Gas Hydrates of Northwestern Siberia ............. 8 Announcements .................. 11 * JIP Tests in the Gulf of Mexico * Planning Workshop Slated for Early Next Year Spotlight on Research ........ 12 Ingo Pecher CONTACT POINT Ray Boswell National Energy Technology Laboratory (304) 285-4541 (304) 285-4216 fax Ray.Boswell@netl.doe.gov The Fire in the Ice Newsletter is also available online at our website (http://www.netl.doe.gov/ scngo/Natural%20Gas/hydrates/)

499

Metastable hydronium ions in UV-irradiated ice  

SciTech Connect

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

500

Annual measurement of sea-ice thickness using an upward-looking sonar  

Science Journals Connector (OSTI)

... and the forms the ice takes are of great importance to operators in polar conditions. Offshore ...

Rick Hudson

1990-03-08T23:59:59.000Z