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1

Estimating the rebound effect in US manufacturing energy consumption  

Science Journals Connector (OSTI)

The energy price shocks of the 1970s are usually assumed to have increased the search for new energy saving technologies where eventual gains in energy efficiencies will reduce the real per unit price of energy services and hence, the consumption of energy will rise and partially offset the initial reduction in the usage of energy sources. This is the ‘rebound effect’, which is estimated for the US manufacturing sector using time series data applying the dynamic OLS method (DOLS). When allowing for asymmetric price effects the rebound effect is found to be approximately 24% for the US manufacturing sector.

Jan Bentzen

2004-01-01T23:59:59.000Z

2

Computation of economic rebound effect in different sectors of the U.S. economy  

E-Print Network (OSTI)

Economic rebound effect is the phenomenon in which price reduction in products and services, induced by energy efficiency increase will cause more consumption leading to an "eat away" of the potential decreases in energy ...

Kalakkad Jayaraman, Suganth Kumar

2008-01-01T23:59:59.000Z

3

Traveled distance, stock and fuel efficiency of private vehicles in Canada: price elasticities and rebound effect  

Science Journals Connector (OSTI)

This paper presents estimates of the rebound effect and other elasticities for the Canadian light-duty vehicle fleet using panel data at the provincial level from 1990 to 2004. We estimate a simultaneous three-eq...

Philippe Barla; Bernard Lamonde; Luis F. Miranda-Moreno; Nathalie Boucher

2009-07-01T23:59:59.000Z

4

An empirical study of direct rebound effect for road freight transport in China  

Science Journals Connector (OSTI)

Abstract Improving energy efficiency has been considered as a major approach to reduce transportation fuel consumption, whereas its effectiveness that reduced transportation cost may lead to incremental energy use-i.e., a “direct rebound effect”. This paper provides a critical review of direct rebound effect literature, adopts a double logarithmic regression equation and a error correction model respectively to measure the magnitude of long-term and short-term direct rebound effects by 31 provincial panel data of China from 1999 to 2011. The empirical study shows that: in aspect of long term, a partial rebound effect exist in Chinese road freight transportation department, and its magnitude of entire nation, eastern, central and western regions are 84%, 52%, 80% and 78%. A majority of the expected energy reduction from efficiency improvement could be offset due to the existence of rebound effect; independent policy of improving energy efficiency is not as effective as people expected. In aspect of short term, a tiny super conservation effect exists in Chinese road freight transportation department. Further investigation indicated that direct rebound effect for road freight transportation tends to decline as growth rate of urbanization decrease.

Zhaohua Wang; Milin Lu

2014-01-01T23:59:59.000Z

5

The Remarkable Environmental Rebound Effect of Electric Cars: A Microeconomic Approach  

Science Journals Connector (OSTI)

For FBE and HFC cars, the high capital costs cause a noteworthy decrease in environmental pressures for some indicators (negative rebound effect). ... For instance, there are approaches based on Engel curves (expenditure elasticities)(24, 25) or on the shifting of expenditure patterns between income groups. ... When the environmental profile of the product of investigation is very different from that in other sectors, rebound effects from a reallocation of expenditures can be very high, as was the case for FEP and TETP for FBE cars. ...

David Font Vivanco; Jaume Freire-González; René Kemp; Ester van der Voet

2014-09-26T23:59:59.000Z

6

Rebound Effects in Sustainable HCI Samuel J. Kaufman  

E-Print Network (OSTI)

or water consumption) may be poor indica- tors of such systems' effect on emissions because of effects, or energy efficiency technology [4], is: 1. SHCI researchers make information systems (devices, phone. This research has shown promis- ing results. However, the proxies generally used in evaluation (e.g. less energy

Anderson, Richard

7

Making the ‘rebound effect’ more useful for performance evaluation of thermal retrofits of existing homes: Defining the ‘energy savings deficit’ and the ‘energy performance gap’  

Science Journals Connector (OSTI)

Abstract Concern has recently intensified regarding increases in the consumption of energy services that often follow energy efficiency improvements, a phenomenon widely called the ‘rebound effect’. However, while some economists have precisely defined this as a metric, much discussion in academic and policy literature is imprecise, leading to confusion and miscommunication. This is especially so regarding direct ‘rebound effects’ in thermal retrofits of existing homes. This study surveys common usages of the term ‘rebound effect’ in domestic heating, identifying three main metrics, which employ different mathematical forms and therefore give different results, but are often lumped together. It defines these as the ‘classic’ rebound effect; the ‘energy savings deficit’, and the ‘energy performance gap’. It then applies these to an empirical case study of three recently retrofitted 30-apartment buildings in Germany. It finds that each metric gives different results for identical situations, ranging from 2.0% to 29.9% for one building, 15.7% to 56.8% for the second, and 43.7% to 272.9% for the third. This may be one reason so-called ‘rebound effect’ results from various studies are so disparate. Nevertheless, specific uses are identified for each of the three metrics, provided their precise definitions are made clear.

Ray Galvin

2014-01-01T23:59:59.000Z

8

The determinants of fuel use in the trucking industry—volume, fleet characteristics and the rebound effect  

Science Journals Connector (OSTI)

This paper studies the determinants of fuel use in the trucking industry in Denmark, using aggregate time series data for the period 1980–2007. The model captures the main linkages between the demand for freight transport, the characteristics of the vehicle fleet, and the demand for fuel. Results include the following. First, we precisely define and estimate a rebound effect of improvements in fuel efficiency in the trucking industry: behavioural adjustments in the industry imply that an exogenous improvement in fuel efficiency reduces fuel use less than proportionately. Our best estimate of this effect is approximately 10 % in the short run and 17 % in the long run, so that a 1% improvement in fuel efficiency reduces fuel use by 0.90% (short-run) to 0.83% (long-run). Second, we find that higher fuel prices raise the average capacity of trucks, and they induce firms to invest in newer, typically more fuel efficient, trucks. Third, these adjustments and the rebound effect jointly imply that the effect of higher fuel prices on fuel use in the trucking industry is fairly small; estimated price elasticities are ? 0.13 and ? 0.22 in the short run and in the long run, respectively. The empirical results of this paper have implications for judging the implications of fuel efficiency standards and regulations with respect to larger trucks in the EU.

Bruno De Borger; Ismir Mulalic

2012-01-01T23:59:59.000Z

9

Estimating broad-brush rebound effects for household energy consumption in the EU 28 countries and Norway: some policy implications of Odyssee data  

Science Journals Connector (OSTI)

Abstract Currently there is a strong policy commitment in European Union (EU) and Organisation for Economic Co-operation and Development (OECD) countries to increase the energy efficiency of residential buildings, and it is widely assumed that this will naturally and automatically reduce domestic energy consumption. However, other factors such as fuel prices, wages, attitudes and lifestyles also influence energy consumption. This paper calculates broad-brush rebound effects based on changes in energy efficiency and energy consumption in each of the 28 EU countries plus Norway, for the years 2000–2011. In doing so, it tests how well the assumption of energy efficiency leading to energy reduction stands up to scrutiny in these lands. It uses the EU’s Odyssee database for efficiency and consumption figures and a commonly employed econometric definition of the rebound effect as an energy-efficiency elasticity. Most older EU lands show rebound effects in the expected range of 0–50%. However, the range for newer EU countries is 100–550%, suggesting that energy efficiency increases are not a good predictor of energy consumption. A more in-depth look at one country, Germany, suggests these results underestimate the rebound effect significantly. This also identifies research needs for specific energy consumption determinants in each country, to find more precisely what is driving consumption levels.

Ray Galvin

2014-01-01T23:59:59.000Z

10

Gross Theory of ?-Decay and Shell Effects  

Science Journals Connector (OSTI)

......nuclear final state measured fr:orn the parent. Although actual decays pro- Gross Theory of f3-Decay and Shell Effects 137 ceed only to the region of negative values of E, we extend our consideration to the positive region. Now, we can regard the whole......

Takayoshi Kondoh; Masami Yamada

1976-03-01T23:59:59.000Z

11

Stability of bubble nuclei through Shell-Effects  

E-Print Network (OSTI)

We investigate the shell structure of bubble nuclei in simple phenomenological shell models and study their binding energy as a function of the radii and of the number of neutron and protons using Strutinsky's method. Shell effects come about, on the one hand, by the high degeneracy of levels with large angular momentum and, on the other, by the big energy gaps between states with a different number of radial nodes. Shell energies down to -40 MeV are shown to occur for certain magic nuclei. Estimates demonstrate that the calculated shell effects for certain magic numbers of constituents are probably large enough to produce stability against fission, alpha-, and beta-decay. No bubble solutions are found for mass number A < 450.

Klaus Dietrich; Krzysztof Pomorski

1997-04-25T23:59:59.000Z

12

Empirical effective interactions in the lower fp shell and upper sd shell  

Science Journals Connector (OSTI)

Average values of matrix elements of the effective nucleon-nucleon interaction can be extracted from measured binding energies and spectra using a variety of simple techniques. Such techniques are applied to data in the mass range A=28–64 to yield information about the interaction energy of nucleons occupying the 2s1/2, 1d3/2, 1f7/2, and 2p3/2 shell-model orbits. The resulting interaction centroids are compared with values provided by other methods, such as shell-model fits to experimental energy levels, calculation of the G matrix from free nucleon-nucleon potentials, and extraction of interaction matrix elements directly from the spectra of nuclei with two nucleons relative to a closed shell. The empirical centroids are shown to be surprisingly accurate.

B. J. Cole

1991-07-01T23:59:59.000Z

13

Analysis of Contaminant Rebound in Ground Water in Extraction...  

Office of Environmental Management (EM)

Analysis of Contaminant Rebound in Ground Water in Extraction Wells at the Tuba City, Arizona, Site Analysis of Contaminant Rebound in Ground Water in Extraction Wells at the Tuba...

14

Deflection Effects in Inner-Shell Ionization  

E-Print Network (OSTI)

. The larger peak at small impact parameters, interpreted by Anderson et al. ' as an interference effect between the two "legs" of the deflected path, is very accurately reproduced. The calculation was carried out with a basis containing 5s, 12P, and 154.... Further, Andersen et al. cite an absolute total cross section at 2 MeV of 115 b, where our calculation gives 82 b. This particular cross section has been mea- sured by other authors, where results of S6+5 b" or S4 +7 b'" are quoted. These latter two...

Swafford, G. L.; Reading, John F.; Ford, A. Lewis; Fitchard, E.

1977-01-01T23:59:59.000Z

15

Coextruded Polyethylene and Wood-Flour Composite: Effect of Shell Thickness, Wood Loading, and Core  

E-Print Network (OSTI)

Coextruded Polyethylene and Wood-Flour Composite: Effect of Shell Thickness, Wood Loading, and Core recycled polyethylene and wood-flour composites with core­shell structure were manufactured using a pilot

16

Semiclassical origin of anomalous shell effect for tetrahedral deformation in radial power-law potential model  

E-Print Network (OSTI)

Shell structures in single-particle energy spectra are investigated against regular tetrahedral type deformation using radial power-law potential model. Employing a natural way of shape parametrization which interpolates sphere and regular tetrahedron, we find prominent shell effects at rather large tetrahedral deformations, which bring about shell energies much larger than the cases of spherical and quadrupole type shapes. We discuss the semiclassical origin of these anomalous shell structures using periodic orbit theory.

Ken-ichiro Arita; Yasunori Mukumoto

2014-05-09T23:59:59.000Z

17

Does economic development drive the fertility rebound in OECD countries?  

E-Print Network (OSTI)

1 Does economic development drive the fertility rebound in OECD countries? Angela Luci, Olivier Thévenon 167 2010 #12;2 #12;3 Does economic development drive the fertility rebound in OECD countries.thevenon@ined.fr We examine how far changes in fertility trends are related to ongoing economic development in OECD

Paris-Sud XI, Université de

18

Search for an effect of shell closure on nuclear dissipation via a neutron-multiplicity measurement  

Science Journals Connector (OSTI)

The prescission neutron multiplicity excitation function is measured for the first time for three isotopes across a major closed shell in order to investigate the shell effects on fission hindrance. Three isotopes of Fr (213,215,217Fr) are populated by fusion of 19F+194,196,198Pt in the excitation energy range of 46.6–91.8 MeV. While 213Fr has a major neutron shell closure at N=126, 215Fr and 217Fr are away from the closed shell. It is found from the statistical model analysis of the experimental data that the strengths of nuclear dissipation for nuclei away from shell closure are very similar. On the other hand, the dissipation is relatively weaker for a shell-closed nucleus in comparison to adjacent nuclei away from shell closure.

Varinderjit Singh; B. R. Behera; Maninder Kaur; P. Sugathan; K. S. Golda; A. Jhingan; Jhilam Sadhukhan; Davinder Siwal; S. Goyal; S. Santra; A. Kumar; R. K. Bhowmik; M. B. Chatterjee; A. Saxena; Santanu Pal; S. Kailas

2012-07-13T23:59:59.000Z

19

Fusion Hindrance and the Role of Shell Effects in the Superheavy Mass Region  

E-Print Network (OSTI)

We present the first attempt of the systematical investigation about the effects of shell correction energy for dynamical processes, which include fusion, fusion-fission and quasi-fission processes. In the superheavy mass region, for the fusion process, the shell correction energy plays a very important role and enhances the fusion probability, when the colliding partner has strong shell structure. By analyzing the trajectory in the three-dimensional coordinate space with a Langevin equation, we reveal the mechanism of the enhancement of the fusion probability caused by shell effects.

Y. Aritomo

2006-09-13T23:59:59.000Z

20

Rebound 2007: Analysis of U.S. Light-Duty Vehicle Travel Statistics  

SciTech Connect

U.S. national time series data on vehicle travel by passenger cars and light trucks covering the period 1966 2007 are used to test for the existence, size and stability of the rebound effect for motor vehicle fuel efficiency on vehicle travel. The data show a statistically significant effect of gasoline price on vehicle travel but do not support the existence of a direct impact of fuel efficiency on vehicle travel. Additional tests indicate that fuel price effects have not been constant over time, although the hypothesis of symmetry with respect to price increases and decreases is not rejected. Small and Van Dender (2007) model of a declining rebound effect with income is tested and similar results are obtained.

Greene, David L [ORNL

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" 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

Fusion hindrance and roles of shell effects in superheavy mass region  

E-Print Network (OSTI)

We present the first attempt of systematically investigating the effects of shell correction energy for a dynamical process, which includes fusion, fusion-fission and quasi-fission processes. In the superheavy mass region, for the fusion process, shell correction energy plays a very important role and enhances the fusion probability when the colliding partner has a strong shell structure. By analyzing the trajectory in three-dimensional coordinate space with the Langevin equation, we reveal the mechanism of the enhancement of the fusion probability caused by `cold fusion valleys'. The temperature dependence of shell correction energy is considered.

Aritomo, Y

2006-01-01T23:59:59.000Z

22

Fusion hindrance and roles of shell effects in superheavy mass region  

E-Print Network (OSTI)

We present the first attempt of systematically investigating the effects of shell correction energy for a dynamical process, which includes fusion, fusion-fission and quasi-fission processes. In the superheavy mass region, for the fusion process, shell correction energy plays a very important role and enhances the fusion probability when the colliding partner has a strong shell structure. By analyzing the trajectory in three-dimensional coordinate space with the Langevin equation, we reveal the mechanism of the enhancement of the fusion probability caused by `cold fusion valleys'. The temperature dependence of shell correction energy is considered.

Y. Aritomo

2006-09-18T23:59:59.000Z

23

PHYSICAL REVIEW C 77, 064308 (2008) Effective shell model Hamiltonians from density functional theory: Quadrupolar and  

E-Print Network (OSTI)

for mapping a self-consistent mean-field theory (also known as density functional theory) onto a shell-state solution of this density functional theory at the Hartree-Fock plus BCS level, an effective shell-consistent mean-field (SCMF) approximation [1], also known as density functional theory (DFT

Bertsch George F.

24

Precise Barriers and Shell Effects: a New Inroad to Fission Saddle Point Spectroscopy  

E-Print Network (OSTI)

Fission excitation functions have been measured for a chain of neighboring compound nuclei, from 207Po to 212Po. We present a new analysis which provides a determination of the fission barriers and ground state shell effects with nearly spectroscopic accuracy. The improved accuracy achieved in this analysis may lead to a future detailed exploration of the saddle mass surface and its spectroscopy. The sensitivity of the fission probabilities on shell effects extends to excitation energies of 150 MeV and negates recent claims for the disappearance of shell corrections due to collective effects.

L. Phair; L. G. Moretto; K. X. Jing; L. Beaulieu; D. Breus; J. B. Elliott; T. S. Fan; Th. Rubehn; G. J. Wozniak

2003-03-06T23:59:59.000Z

25

Piezoelectric shell structures as wearable energy harvesters for effective power generation at low-frequency movement  

Science Journals Connector (OSTI)

This paper discusses a flexible energy harvester that consists of a polyvinylidene fluoride film attached to a curved substrate in a shell shape for harvesting energy from human motion. The proposed harvester effectively converts mechanical energy into electrical energy during the fast state transition of the shell structure. The results of an experiment demonstrated that shell structures with various curvatures produce high output potential and consequently offer high output power in comparison to a simple flat structure. The single shell structure generates an output power of 0.87 mW at a folding angle of 80° and a folding and unfolding frequency of 3.3 Hz. In addition, fabric with embedded piezoelectric shell structures was designed as an energy harvester in a wearable platform. The fabric, worn on the elbow joints and fingers, generates a high output power of 0.21 mW in spite of slow and irregular motion.

Boram Yang; Kwang-Seok Yun

2012-01-01T23:59:59.000Z

26

The effect of various calcium and phosphorus levels on egg production and egg shell quality  

E-Print Network (OSTI)

. ) (Pleiahc~) Angust 1980 ABSTRACT The Effect of Various Calcium and Phosphorus Levels on Egg Production and Egg Shell Quality. (August 1980) John Warren Bradley, Junior B. S. , Texas A&M University Chairman of Advisory Committee: Dr. C. R. Creger Two... experiments were conducted, using a commercial strain of White Leghorn laying hens, to determine the effect of feeding various dietary combinations of calcium and phosphorus on egg production and egg shell quality. Calcium carbonate in the form of oyster...

Bradley, John Warren

1980-01-01T23:59:59.000Z

27

Effect of shells on photoluminescence of aqueous CdTe quantum dots  

SciTech Connect

Graphical abstract: Size-tunable CdTe coated with several shells using an aqueous solution synthesis. CdTe/CdS/ZnS quantum dots exhibited high PL efficiency up to 80% which implies the promising applications for biomedical labeling. - Highlights: • CdTe quantum dots were fabricated using an aqueous synthesis. • CdS, ZnS, and CdS/ZnS shells were subsequently deposited on CdTe cores. • Outer ZnS shells provide an efficient confinement of electron and hole inside the QDs. • Inside CdS shells can reduce the strain on the QDs. • Aqueous CdTe/CdS/ZnS QDs exhibited high stability and photoluminescence efficiency of 80%. - Abstract: CdTe cores with various sizes were fabricated in aqueous solutions. Inorganic shells including CdS, ZnS, and CdS/ZnS were subsequently deposited on the cores through a similar aqueous procedure to investigate the effect of shells on the photoluminescence properties of the cores. In the case of CdTe/CdS/ZnS quantum dots, the outer ZnS shell provides an efficient confinement of electron and hole wavefunctions inside the quantum dots, while the middle CdS shell sandwiched between the CdTe core and ZnS shell can be introduced to obviously reduce the strain on the quantum dots because the lattice parameters of CdS is situated at the intermediate-level between those of CdTe and ZnS. In comparison with CdTe/ZnS core–shell quantum dots, the as-prepared water-soluble CdTe/CdS/ZnS quantum dots in our case can exhibit high photochemical stability and photoluminescence efficiency up to 80% in an aqueous solution, which implies the promising applications in the field of biomedical labeling.

Yuan, Zhimin; Yang, Ping, E-mail: mse_yangp@ujn.edu.cn

2013-07-15T23:59:59.000Z

28

A concentration rebound method for measuring particle penetration and  

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

A concentration rebound method for measuring particle penetration and A concentration rebound method for measuring particle penetration and deposition in the indoor environment Title A concentration rebound method for measuring particle penetration and deposition in the indoor environment Publication Type Journal Article LBNL Report Number LBNL-51631 Year of Publication 2003 Authors Thatcher, Tracy L., Melissa M. Lunden, Kenneth L. Revzan, Richard G. Sextro, and Nancy J. Brown Journal Aerosol Science & Technology Volume 37 Start Page Chapter Pagination 847-864 Abstract Continuous, size resolved particle measurements were performed in two houses in order to determine size- dependent particle penetration into and deposition in the indoor environment. The experiments consisted of three parts: measurement of the particle loss rate following artificial elevation of indoor particle concentrations,

29

Effects of dietary phosphorus and high ambient temperature on egg shell quality in hens  

E-Print Network (OSTI)

EFFECTS OF DIETARY PHOSPHORUS AND HIG11 AMB1ENT TEMPERATURE ON EGG SHELL QUALITY IN HENS A Thesis by CHRISTOPHER ANTHONY BAI1EEY Submitted to the Graduate College of Texas A@I University in Partial fuI. fillme ~t of the requirement... for the degree of F1ASTER OF SCIENCE May 19 79 Major Subject: Poultry Science EFFECTS OF DIETARY PHOSPHORUS AND HIGH AMBIENT TEMPERATURE ON EGG SHELL QUALITY IN HENS A Thesis by CHRISTOPHER ANTHONY BAILEY Approved as to style and content by; ( hairm...

Bailey, Christopher Anthony

1979-01-01T23:59:59.000Z

30

Scaling laws, transient times and shell effects in helium induced nuclear fission  

E-Print Network (OSTI)

Fission excitation functions of He-3 and He-4 induced compound nuclei are shown to scale exactly according to the Bohr-Wheeler transition state prediction once the shell effects are accounted for. The presented method furthermore allows one to model-independently extract values for the shell effects which are in good agreement to those obtained from liquid-drop model calculations. The fact that no deviations from the transition state method have been observed within the experimentally investigated excitation energy regime allows one to assign an upper limit for the transient time of 10 zs.

Th. Rubehn; K. X. Jing; L. G. Moretto; L. Phair; K. Tso; G. J. Wozniak

1996-07-22T23:59:59.000Z

31

Charged Pion Photoproduction on the p-Shell Nuclei at Low Energy and Rescattering Effect of a Pion  

Science Journals Connector (OSTI)

......the p-Shell Nuclei at Low Energy and Rescattering Effect of a...photoproduction reaction at low energy, We investigate two types of...C26. 2554[APS] . 19) Audit G. , et al. Phys. Rev...the p-Shell Nuclei at Low Energy and Rescattering Effect of a......

Naoto Odagawa; Toru Sato; Hisao Ohtsubo

1991-12-01T23:59:59.000Z

32

The effect of a partial resistive shell on the magnetohydrodynamical stability of tokamak plasmas  

E-Print Network (OSTI)

The effect of a partial resistive shell on the magnetohydrodynamical stability of tokamak plasmas- , large aspect-ratio, circular flux-surface tokamak. In most cases, it is possible to replace a partial is vital to the success of the ``advanced tokamak'' concept,28 which aims to simul- taneously maximize

Fitzpatrick, Richard

33

Ab initio Approach to Effective Single-Particle Energies in Doubly Closed Shell Nuclei  

SciTech Connect

The present work discusses, from an ab initio standpoint, the definition, the meaning, and the usefulness of effective single-particle energies (ESPEs) in doubly closed shell nuclei. We perform coupled-cluster calculations to quantify to what extent selected closed-shell nuclei in the oxygen and calcium isotopic chains can effectively be mapped onto an effective independent-particle picture. To do so, we revisit in detail the notion of ESPEs in the context of strongly correlated many-nucleon systems and illustrate the necessity of extracting ESPEs through the diagonalization of the centroid matrix, as originally argued by Baranger. For the purpose of illustration, we analyze the impact of correlations on observable one-nucleon separation energies and nonobservable ESPEs in selected closed-shell oxygen and calcium isotopes. We then state and illustrate the nonobservability of ESPEs. Similarly to spectroscopic factors, ESPEs can indeed be modified by a redefinition of inaccessible quantities while leaving actual observables unchanged. This leads to the absolute necessity of employing consistent structure and reaction models based on the same nuclear Hamiltonian to extract the shell structure in a meaningful fashion from experimental data.

Duguet, T. [CEA-Saclay DSM/Irfu/SPhN, France/NSCL, Michigan State University; Hagen, G. [University of Tennessee (UTK) and Oak Ridge National Laboratory (ORNL)

2012-01-01T23:59:59.000Z

34

Rebound of hepatitis C virus RNA in serum after withdrawal of interferon in patients with advanced liver disease  

Science Journals Connector (OSTI)

Interferon-? (IFN) was given to 43 patients with hepatitis C virus (HCV)-related chronic liver disease. Response to IFN, estimated by the clearance of HCV RNA from serum and normalization of alanine aminotransferase levels at 6 months after withdrawal, occurred in 17 patients who had lower histology activity index score than non-responders (7.9 ± 2.8 vs. 10.7 ± 2.1, P < 0.001). Responders had lower pretreatment HCV RNA levels than non-responders (2.6 ± 1.1 vs. 3.9 ± 1.5, P < 0.005), and patients infected with HCV of genotype II responded less often than those with genotype III (424 or 17% vs. 810 or 80%, P < 0.01). HCV RNA rebounded at 6 months after the withdrawal of IFN, exceeding pretreatment levels, in nine (35%) of 26 non-responders. The rebound occurred in one (10%) of ten non-responders with chronic active hepatitis 2A, six (60%) of ten with chronic active hepatitis 2B and two (40%) of five with cirrhosis; it was not observed in a single non-responder with chronic persistent hepatitis. Thus, the frequency of rebound correlated with the severity of liver disease. The results indicated the need for early treatment with IFN and prediction of response in patients with chronic hepatitis C, lest non-responders with advanced liver disease should suffer from adverse effects of interferon therapy.

Michiko Tsukamoto; Yoshiki Miyazaki; Hiroaki Okamoto; Yoshihiro Akahane

1995-01-01T23:59:59.000Z

35

Experimental Investigation of the Effect of M-Band Preheating in Indirectly-Driven Double-Shell Implosions  

SciTech Connect

Experimental results are presented from several series of experiments studying the effect of 2-4 keV M-shell radiation on the implosion of double-shell capsules on the Omega Laser at the Laboratory for Laser Energetics. In the First series of experiments, precision machined double-shell capsules implosions are performed. A discrepancy is observed between the experimentally measured M-band fraction and the simulated value. The application of a time-dependent multiplier to the simulated M-band level results in a decrease in predicted yield of 35% and a corresponding increase in the YoC to 20-35%. In order to further investigate this discrepancy, a series of ''M-Band driven'' targets has been designed. An oversized outer shell is used to preferentially allow the M-band radiation to drive the implosion of a CH-tamped glass inner shell. The inner shell radius-time history is measured and is shown to be consistent with the simulations using the time-dependent M-band multipliers. The spatial distribution of this M-band source is also varied using hohlraums of different length and adjusting the laser pointing accordingly. The resulting asymmetry of the inner shell implosion is diagnosed both by x-ray backlighting prior to shell collision and by core emission.

Robey, H F; Amendt, P A; Park, H-S; Landen, O L; Watt, R G; Varnum, W S

2003-08-22T23:59:59.000Z

36

Controlled self-assembly of multiferroic core-shell nanoparticles exhibiting strong magneto-electric effects  

SciTech Connect

Ferromagnetic-ferroelectric composites show strain mediated coupling between the magnetic and electric sub-systems due to magnetostriction and piezoelectric effects associated with the ferroic phases. We have synthesized core-shell multiferroic nano-composites by functionalizing 10–100?nm barium titanate and nickel ferrite nanoparticles with complementary coupling groups and allowing them to self-assemble in the presence of a catalyst. The core-shell structure was confirmed by electron microscopy and magnetic force microscopy. Evidence for strong strain mediated magneto-electric coupling was obtained by static magnetic field induced variations in the permittivity over 16–18?GHz and polarization and by electric field induced by low-frequency ac magnetic fields.

Sreenivasulu, Gollapudi; Hamilton, Sean L.; Lehto, Piper R.; Srinivasan, Gopalan, E-mail: srinivas@oakland.edu [Physics Department, Oakland University, Rochester, Michigan 48309-4401 (United States); Popov, Maksym [Physics Department, Oakland University, Rochester, Michigan 48309-4401 (United States); Radiophysics Department, Taras Shevchenko National University of Kyiv, Kyiv 01601 (Ukraine); Chavez, Ferman A. [Chemistry Department, Oakland University, Rochester, Michigan 48309-4401 (United States)

2014-02-03T23:59:59.000Z

37

Drop Impact and Rebound Dynamics on an Inclined Superhydrophobic Surface  

Science Journals Connector (OSTI)

The ability of the superhydrophobic surface in promoting drop rebound has significant applications in areas such as anti-icing and fouling on aircraft, power lines, and wind turbines and has prompted researchers to create an array of synthetic superhydrophobic surfaces using fabrication methods such as surface etching techniques (plasma, laser, chemical), lithography (photolithography, electron beam, X-ray), electrochemical deposition processes, spray casting, as well as electrospinning techniques. ... For example, ice accretion on a wind turbine blade as well as on an aircraft wing typically involves impact and freezing of supercooled liquid droplets on those surfaces at subzero environmental temperatures. ... By varying laser fluence, micro-texture morphol. of the wafers could be reproduced and well controlled. ...

Yong Han Yeong; James Burton; Eric Loth; Ilker S. Bayer

2014-09-12T23:59:59.000Z

38

Development of a general model of aggregate rebound for dry-mix shotcrete—(Part II)  

Science Journals Connector (OSTI)

A mechanical model previously developed is briefly described and linked to particle velocity versus size relationships experimentally obtained, allowing prediction of the energy of rebound of an aggregate particl...

Hugo S. Armelin Ph.D. Candidate; Professor Nemkumar Banthia

1998-04-01T23:59:59.000Z

39

Finite element plate formulation including transverse shear effects for representing composite shell structures  

E-Print Network (OSTI)

For Representing Composite Shell Structures. (May 1987) Jsmil M. Hamdallah, B. S. , University of Toledo Chairman of Advisory Committee: Dr. John J. Engblom A finite element formulation for the analysis of thin to moderately thick lam- inated composite shell... in an analysis if delamination is to be avoided. The results obtained in this research confirm the potential use of the element presented as an accurate and eflicient tool in the analysis of thin to moderately thick laminated shell structures. To my parents...

Hamdallah, Jamil M.

2012-06-07T23:59:59.000Z

40

Off-shell Effects and the Higgs Width | Argonne National Laboratory  

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

There has been a great deal of recent interest in the off-shell properties of the Higgs boson in VV decays, and in particular, the extraction of Higgs width constraints from...

Note: This page contains sample records for the topic "rebound effect shell" 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 Doppler effect in the field of a thick spherical shell  

Science Journals Connector (OSTI)

The relativistic field of a thick spherical shell of matter is worthy of notice inasmuch as it provides the only known example of a Euclidean pocket in a Riemannian space-time. The boundary conditions are used to...

V. V. Narlikar F.A.Sc.; Ayodhya Prasad M.Sc.

1949-10-01T23:59:59.000Z

42

Shell Measures  

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

Residential Commercial Commercial Industrial Lighting Energy Smart Grocer Program HVAC Program Shell Measures Commercial Kitchen & Food Service Equipment Plug Load New...

43

Neutron multiplicity measurements for 19F+194,196,198Pt systems to investigate the effect of shell closure on nuclear dissipation  

Science Journals Connector (OSTI)

Pre- and post-scission neutron multiplicities are measured for the three isotopes of Fr (217Fr, 215Fr, and 213Fr) in the excitation energy range of 48–91.8 MeV. Out of these three isotopes, 213Fr has shell closure (NC=126) while the other two are non-closed-shell nuclei. Statistical model calculations using Kramers’ fission width are performed to investigate shell effects on the dissipation strength which fit the experimental data. It is observed that shell correction to the binding energies of the evaporated particles strongly affects the fitted values of the dissipation strength. However, the best-fit dissipation strength is only weakly influenced by the inclusion of shell correction in fission barrier.

Varinderjit Singh; B. R. Behera; Maninder Kaur; A. Kumar; P. Sugathan; K. S. Golda; A. Jhingan; M. B. Chatterjee; R. K. Bhowmik; Davinder Siwal; S. Goyal; Jhilam Sadhukhan; Santanu Pal; A. Saxena; S. Santra; S. Kailas

2013-06-03T23:59:59.000Z

44

Ab-initio coupled-cluster effective interactions for the shell model: Application to neutron-rich oxygen and carbon isotopes  

E-Print Network (OSTI)

We derive and compute effective valence-space shell-model interactions from ab-initio coupled-cluster theory and apply them to open-shell and neutron-rich oxygen and carbon isotopes. Our shell-model interactions are based on nucleon-nucleon and three-nucleon forces from chiral effective-field theory. We compute the energies of ground and low-lying states, and find good agreement with experiment. In particular our calculations are consistent with the N=14, 16 shell closures in oxygen-22 and oxygen-24, while for carbon-20 the corresponding N=14 closure is weaker. We find good agreement between our coupled-cluster effective-interaction results with those obtained from standard single-reference coupled-cluster calculations for up to eight valence neutrons.

G. R. Jansen; J. Engel; G. Hagen; P. Navratil; A. Signoracci

2014-02-11T23:59:59.000Z

45

Effects of Fuel-Shell Mix upon Direct-Drive, Spherical Implosions on OMEGA C. K. Li, F. H. Seguin, J. A. Frenje, S. Kurebayashi, and R. D. Petrasso*  

E-Print Network (OSTI)

Effects of Fuel-Shell Mix upon Direct-Drive, Spherical Implosions on OMEGA C. K. Li, F. H. Se September 2002) Fuel-shell mix and implosion performance are studied for many capsule types in direct shortfalls are likely to be caused by fuel-shell mix. DOI: 10.1103/PhysRevLett.89.165002 PACS numbers: 52

46

Hollow spherical shell manufacture  

DOE Patents (OSTI)

A process is disclosed for making a hollow spherical shell of silicate glass composition in which an aqueous suspension of silicate glass particles and an immiscible liquid blowing agent is placed within the hollow spherical cavity of a porous mold. The mold is spun to reduce effective gravity to zero and to center the blowing agent, while being heated so as to vaporize the immiscible liquid and urge the water carrier of the aqueous suspension to migrate into the body of the mold, leaving a green shell compact deposited around the mold cavity. The green shell compact is then removed from the cavity, and is sintered for a time and a temperature sufficient to form a silicate glass shell of substantially homogeneous composition and uniform geometry. 3 figures.

O'Holleran, T.P.

1991-11-26T23:59:59.000Z

47

Hollow spherical shell manufacture  

DOE Patents (OSTI)

A process for making a hollow spherical shell of silicate glass composition in which an aqueous suspension of silicate glass particles and an immiscible liquid blowing agent is placed within the hollow spherical cavity of a porous mold. The mold is spun to reduce effective gravity to zero and to center the blowing agent, while being heated so as to vaporize the immiscible liquid and urge the water carrier of the aqueous suspension to migrate into the body of the mold, leaving a green shell compact deposited around the mold cavity. The green shell compact is then removed from the cavity, and is sintered for a time and a temperature sufficient to form a silicate glass shell of substantially homogeneous composition and uniform geometry.

O'Holleran, Thomas P. (Belleville, MI)

1991-01-01T23:59:59.000Z

48

The effects of age and season on selected quality characteristics of shell eggs from several strains of commercial laying hens  

E-Print Network (OSTI)

). Therefore, shell thickness, shell weight, and shell weight per unit of egg surface area (SWUSA) are more precisely estimated from egg specific gravity when egg weight is included as a second independent variable (Nordstrom and Oustezhout, 1982... and cotterill (1977) have also suggested that specific gravity is closely correlated with shell thickness. The negative correlation of specific gravity with egg surface area agrees with the findings of Nordstrom and Ousterhout (1982) who reported...

Izat, Amy Lynn

1983-01-01T23:59:59.000Z

49

Effects of ternary mixed crystal and size on optical phonons in wurtzite nitride core-shell nanowires  

SciTech Connect

Within the framework of dielectric continuum and Loudon's uniaxial crystal models, existence conditions dependent on components and frequencies for optical phonons in wurtzite nitride core-shell nanowires (CSNWs) are discussed to obtain dispersion relations and electrostatic potentials of optical phonons in In{sub x}Ga{sub 1?x}N/GaN CSNWs. The results show that there may be four types of optical phonons in In{sub x}Ga{sub 1?x}N/GaN CSNWs for a given ternary mixed crystal (TMC) component due to the phonon dispersion anisotropy. This property is analogous to wurtzite planar heterojunctions. Among the optical phonons, there are two types of quasi-confined optical (QCO) phonons (named, respectively, as QCO-A and QCO-B), one type of interface (IF) phonons and propagating (PR) phonons existing in certain component and frequency domains while the dispersion relations and electrostatic potentials of same type of optical phonons vary with components. Furthermore, the size effect on optical phonons in CSNWs is also discussed. The dispersion relations of IF and QCO-A are independent of the boundary location of CSNWs. Meanwhile, dispersion relations and electrostatic potentials of QCO-B and PR phonons vary obviously with size, especially, when the ratio of a core radius to a shell radius is small, and dispersion relation curves of PR phonons appear to be close to each other, whereas, this phenomenon disappears when the ratio becomes large. Based on our conclusions, one can further discuss photoelectric properties in nitride CSNWs consisting of TMCs associated with optical phonons.

Li, J.; Guan, J. Y.; Zhang, S. F.; Ban, S. L.; Qu, Y., E-mail: quyuan@imu.edu.cn [School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021 (China)

2014-04-21T23:59:59.000Z

50

MARMOSET: The Path from LHC Data to the New Standard Model via On-Shell Effective Theories  

SciTech Connect

We describe a coherent strategy and set of tools for reconstructing the fundamental theory of the TeV scale from LHC data. We show that On-Shell Effective Theories (OSETs) effectively characterize hadron collider data in terms of masses, production cross sections, and decay modes of candidate new particles. An OSET description of the data strongly constrains the underlying new physics, and sharply motivates the construction of its Lagrangian. Simulating OSETs allows efficient analysis of new-physics signals, especially when they arise from complicated production and decay topologies. To this end, we present MARMOSET, a Monte Carlo tool for simulating the OSET version of essentially any new-physics model. MARMOSET enables rapid testing of theoretical hypotheses suggested by both data and model-building intuition, which together chart a path to the underlying theory. We illustrate this process by working through a number of data challenges, where the most important features of TeV-scale physics are reconstructed with as little as 5 fb{sup -1} of simulated LHC signals.

Arkani-Hamed, Nima; Schuster, Philip; Toro, Natalia; /Harvard U., Phys. Dept.; Thaler, Jesse; /UC, Berkeley /LBL, Berkeley; Wang, Lian-Tao; /Princeton U.; Knuteson, Bruce; /MIT, LNS; Mrenna, Stephen; /Fermilab

2007-03-01T23:59:59.000Z

51

TheK-shell ionization induced by protons: Projectile scattering angle and electronic relativistic effects in the SCA calculations  

Science Journals Connector (OSTI)

The behaviour ofK-shell ionization probabilities for heavy charged projectiles scattered at large angles is investigated in the SCA with hyperbolic trajectories and both relativistic and nonrelativistic functions...

O. Aashamar; L. Kocbach

1976-01-01T23:59:59.000Z

52

Cellular HIV-1 DNA load predicts HIV-RNA rebound and the outcome of highly active antiretroviral therapy  

E-Print Network (OSTI)

Cellular HIV-1 DNA load predicts HIV-RNA rebound and the outcome of highly active antiretroviral-time PCR assay in multiple samples per patient with a median (interquartile range) follow-up of 76 (45­102) weeks. Results: The median (range) baseline HIV-1 DNA load was 297 (, 10 to 3468) copies per 1 3 106

53

Dec 1999 & Jan 2000 Production Fell, But Rebounded with Price  

Gasoline and Diesel Fuel Update (EIA)

8 8 Notes: Will production be high enough this fall to bring stocks back into the normal range? Last winter, production was cut back in December, which, when combined with the strong increase in demand, resulted in the large strong stock draw. But this did not diminish the typical production decline that occurred in January, leaving stocks precariously low. As December began, margins were low, and November weather had been 16% warmer than the prior year. Stocks were in the normal range, and companies were still smarting from the extremely low margins of the prior winter. Refiners reduced production to the prior year's levels as a result. When the cold spell hit the Northeast at the end of January and caused prices to spike, production rebounded in response. However,

54

The effect of plasma background on the instability of two non-parallel quantum plasma shells in whole K space  

SciTech Connect

In this paper, quantum fluid equations together with Maxwell's equations are used to study the stability problem of non-parallel and non-relativistic plasma shells colliding over a “background plasma” at arbitrary angle, as a first step towards a microscopic understanding of the collision shocks. The calculations have been performed for all magnitude and directions of wave vectors. The colliding plasma shells in the vacuum region have been investigated in the previous works as a counter-streaming model. While, in the presence of background plasma (more realistic system), the colliding shells are mainly non-paralleled. The obtained results show that the presence of background plasma often suppresses the maximum growth rate of instabilities (in particular case, this behavior is contrary). It is also found that the largest maximum growth rate occurs for the two-stream instability of the configuration consisting of counter-streaming currents in a very dilute plasma background. The results derived in this study can be used to analyze the systems of three colliding plasma slabs, provided that the used coordinate system is stationary relative to the one of the particle slabs. The present analytical investigations can be applied to describe the quantum violent astrophysical phenomena such as white dwarf stars collision with other dense astrophysical bodies or supernova remnants. Moreover, at the limit of ??0, the obtained results described the classical (sufficiently dilute) events of colliding plasma shells such as gamma-ray bursts and flares in the solar winds.

Mehdian, H., E-mail: mehdian@khu.ac.ir; Hajisharifi, K., E-mail: std-hajisharifi@khu.ac.ir, E-mail: k.hajisharifi@gmail.com; Hasanbeigi, A., E-mail: hbeigi@khu.ac.ir, E-mail: ahbeigi@gmail.com [Department of Physics and Institute for Plasma Research, Kharazmi University, 49 Dr. Mofatteh Avenue, Tehran 15614 (Iran, Islamic Republic of)

2014-07-15T23:59:59.000Z

55

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

56

Gravitational collapse of a radiating shell of matter  

Science Journals Connector (OSTI)

The nonstationary collapse of a radiating fluid shell of matter has been followed through its event horizon in the Vaidya metric in terms of Israel coordinates. The surface density and pressure of the shell were obtained from the integration of the collapse history and are displayed as functions of the shell radius. The shell behavior is determined by two free parameters: its mass function and luminosity-radius relationship. The effects of varying the forms of these two functions have also been examined.

Rick Pim and Kayll Lake

1985-01-15T23:59:59.000Z

57

Biomechanics of Turtle Shells: How Whole Shells Fail in  

E-Print Network (OSTI)

Biomechanics of Turtle Shells: How Whole Shells Fail in Compression PAUL M. MAGWENE1 AND JOHN J of Organismal Biology and Anatomy, University of Chicago, Chicago, Illinois The turtle shell serves an obvious and tactile perception (Rosenberg, '86). The turtle shell is thus a multifunctional system

Socha, Jake

58

Asymptotic safety goes on shell  

E-Print Network (OSTI)

It is well known in quantum field theory that the off-shell effective action depends on the gauge choice and field parametrization used in calculating it. Nevertheless, the typical scheme in which the scenario of asymptotically safe gravity is investigated is an off-shell version of the functional renormalization group equation. Working with the Einstein-Hilbert truncation as a test bed, we develop a new scheme for the analysis of asymptotically safe gravity in which the on-shell part of the effective action is singled out and we show that the beta function for the essential coupling has no explicit gauge-dependence. In order to reach our goal, we introduce several technical novelties, including a different decomposition of the metric fluctuations, a new implementation of the ghost sector, and a new cut-off scheme. We find a non-trivial fixed point, with a value of the cosmological constant which is independent of the gauge-fixing parameters.

Dario Benedetti

2011-11-11T23:59:59.000Z

59

AgrometShell | Open Energy Information  

Open Energy Info (EERE)

User Interface: Desktop Application Website: www.hoefsloot.comagrometshell.htm Cost: Free AgrometShell Screenshot References: AgrometShell1 Logo: AgrometShell "Software for...

60

Single-Molecule Solvation-Shell Sensing  

Science Journals Connector (OSTI)

We present a new route to single-molecule sensing via solvation shells surrounding a current-carrying backbone molecule. As an example, we show that the presence of a water solvation shell “gates” the conductance of a family of oligothiophene-containing molecular wires, and that the longer the oligothiophene, the larger is the effect. For the longest example studied, the molecular conductance is over 2 orders of magnitude larger in the presence of a shell comprising just 10 water molecules. A first principles theoretical investigation of electron transport through the molecules, using the nonequilibrium Green’s function method, shows that water molecules interact directly with the thiophene rings, significantly shifting transport resonances and greatly increasing the conductance. This reversible effect is confirmed experimentally through conductance measurements performed in the presence of moist air and dry argon.

E. Leary; H. Höbenreich; S. J. Higgins; H. van Zalinge; W. Haiss; R. J. Nichols; C. M. Finch; I. Grace; C. J. Lambert; R. McGrath; J. Smerdon

2009-02-23T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" 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 Shell Model  

Science Journals Connector (OSTI)

...A, NUCLEAR SHELL THEORY ( 1963 ). ELSASSER...SUESS, H.E., ARK FYSIK 3 : 577 ( 1951...Wat-son, Collision Theory (Wiley, New York...The first, the basic approach, is to...agreement between theory and experi-ment...Jensen, Arkiv Fysik 3, 577 (1951...

Maria Goeppert Mayer

1964-09-04T23:59:59.000Z

62

Shell-model Monte Carlo studies of fp-shell nuclei  

Science Journals Connector (OSTI)

We study the gross properties of even-even and N=Z nuclei with A=48–64 using shell-model Monte Carlo methods. Our calculations account for all 0?? configurations in the fp shell and employ the modified Kuo-Brown interaction KB3. We find good agreement with data for masses and total B(E2) strengths, the latter employing effective charges ep=1.35e and en=0.35e. The calculated total Gamow-Teller strengths agree consistently with the B(GT+) values deduced from (n,p) data if the shell-model results are renormalized by 0.64, as has already been established for sd-shell nuclei. The present calculations therefore suggest that this renormalization (i.e., gA=1 in the nuclear medium) is universal.

K. Langanke; D. J. Dean; P. B. Radha; Y. Alhassid; S. E. Koonin

1995-08-01T23:59:59.000Z

63

Shell-isolated nanoparticle-enhanced Raman spectroscopy  

E-Print Network (OSTI)

LETTERS Shell-isolated nanoparticle-enhanced Raman spectroscopy Jian Feng Li1 , Yi Fan Huang1 or in the form of nanoparticles, are required to realise a substantial SERS effect, and this has severely limited, we report an approach, which we name shell-isolated nanoparticle-enhanced Raman spectro- scopy

La Rosa, Andres H.

64

Stability of charged thin shells  

SciTech Connect

In this article we study the mechanical stability of spherically symmetric thin shells with charge, in Einstein-Maxwell and Einstein-Born-Infeld theories. We analyze linearized perturbations preserving the symmetry, for shells around vacuum and shells surrounding noncharged black holes.

Eiroa, Ernesto F. [Instituto de Astronomia y Fisica del Espacio, C.C. 67, Suc. 28, 1428, Buenos Aires (Argentina); Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab. I, 1428, Buenos Aires (Argentina); Simeone, Claudio [Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab. I, 1428, Buenos Aires (Argentina); IFIBA, CONICET, Ciudad Universitaria Pab. I, 1428, Buenos Aires (Argentina)

2011-05-15T23:59:59.000Z

65

Energy efficiency in energy policy: Empirical evidence of direct rebound effect in Portuguese households' demand for electricity.  

E-Print Network (OSTI)

??A Work Project, presented as part of the requirements for the Award of a Masters Degree in Economics from the NOVA – School of Business… (more)

Crujo, André Miguel Silva

2012-01-01T23:59:59.000Z

66

Prep plant population rebounds  

SciTech Connect

Demand and higher prices allows more operators to build and upgrade plants. The 2005 US Prep Plant Census found that the number of coal preparation plants has grown from 212 to 265 in five years - a 53 plant gain or a 20% increase over that reported by Coal Age in 2000. The number of bituminous coal washing facilities grew by 43 to 250. The article discusses the survey and the companies involved and presents a table giving key details of plants arranged by state. 6 tabs.

Fiscor, S.

2005-10-01T23:59:59.000Z

67

Shell Solar | Open Energy Information  

Open Energy Info (EERE)

Solar Solar Jump to: navigation, search Name Shell Solar Place The Hague, Netherlands Zip 2501 AN Sector Solar Product Shell Solar is developing non-crystalline PV technology, notably CIS, following the sale of nearly all its crystalline silicon PV operations to SolarWorld in early 2006. References Shell Solar[1] Information About Partnership with NREL Partnership with NREL Yes Partnership Type Uses NREL Research Facilities Partnering Center within NREL National Center for Photovoltaics Partnership Year 2006 LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Shell Solar is a company located in The Hague, Netherlands . References ↑ "Shell Solar" Retrieved from

68

2/12/13 Big Red & Shiny: Rose Art Museum Keeps Rebounding with Three New Exhibitions www.bigredandshiny.com/cgi-bin/BRS.cgi?section=article&issue=BLOG&article=2013-01-12-062535928063830229&printView=true 1/2  

E-Print Network (OSTI)

2/12/13 Big Red & Shiny: Rose Art Museum Keeps Rebounding with Three New Exhibitions www throughout the space. #12;2/12/13 Big Red & Shiny: Rose Art Museum Keeps Rebounding with Three New Gallery Finder Site Map All content © 2013 by BIG RED AND SHINY, Inc unless otherwise noted. All rights

Snider, Barry B.

69

Effect of the Initial Load Parameters on the K?shell Output of Al Planar Wire Arrays Operating in the Microsecond Implosion Regime  

Science Journals Connector (OSTI)

A set of microsecond implosion experiments was carried on the GIT?12 generator to study the radiative performance of Al planar wire arrays. The load parameters such as a wire diameter a gap between the wires the number of wires and the total planar wire mass and width were varied during the experiments however the implosion time and the peak implosion current were almost the same for all load configurations. This ensured equal energy deposition to the plasma due to kinetic mechanisms for all load configurations. Two implosion regimes with the implosion times of 1050 ns and 850 ns were investigated. The experimental data on the K?shell radiation yield and power at varying load parameters are presented.

A. Shishlov; S. Chaikovsky; A. Fedunin; F. Fursov; V. Kokshenev; N. Kurmaev; A. Labetsky; V. Oreshkin; A. Rousskikh; N. Labetskaya

2009-01-01T23:59:59.000Z

70

Instability of a cracked cylindrical shell reinforced by an elastic liner Y.T. Kim a,1  

E-Print Network (OSTI)

liners are used for in situ repair and retrofitting of pipes as a cost effective alternative loading for pipelines and pressurized liquid-retaining structures. Our results show that cracked shell-walled shells are widely employed in pipelines, air- and space-crafts, marine structures, large dams, shell

Vaziri, Ashkan

71

The Storage of Shelled Pecans.  

E-Print Network (OSTI)

AGRIC - KPERIA .. -. STATIC t,4L EI rlENT ! C. H. MCUOSELL, Act~ng mrector Collegz Station. Texas 'LLETIN NO. 667 MARCH, THE STORAGE OF SHELLED PEC-4NS FRED R. BRISON Division of Horticulture . AGRICULTURAL AND MECHANICAL COLLEGE OF TE... Gibb Gilchrist, President [Blank Page in Original Bulletin] Shelled pecans may change in flavor, texture, and color, while in storage. They may also change as a result of insect or disease damage. Kernels change in flavor by becoming progressively...

Brison, Fred R. (Fred Robert)

1945-01-01T23:59:59.000Z

72

Shelling in low dimensional manifolds  

E-Print Network (OSTI)

1974) William Owen Murray IV, B. S. , Southwest Texas State University Chairman of Advisory Committee: Dr. L. B. Treybig The main objective of this thesis is to present some results concerning shelling of 3-cells contained in triangulated 3...-manifolds. These results will include some extensions of a theorem by Treybig which states that every compact 3-manifold has a triangulation in which every 3-cell, which is the union of 3-simplexes of the tri- angulation, can be shelled, Also, a...

Murray, William Owen

2012-06-07T23:59:59.000Z

73

Method and apparatus for determining diameter and wall thickness of minute hollow spherical shells  

DOE Patents (OSTI)

Method and apparatus for determining diameter and wall thickness of hollow microspheres or shells wherein terminal velocities of shells traveling in fluid-filled conduits of differing diameters are measured. A wall-effect factor is determined as a ratio of the terminal velocities, and shell outside diameter may then be ascertained as a predetermined empirical function of wall-effect factor. For shells of known outside diameter, wall thickness may then be ascertained as a predetermined empirical function of terminal velocity in either conduit.

Steinman, D.A.

1980-05-30T23:59:59.000Z

74

E-Print Network 3.0 - ark shell scapharca Sample Search Results  

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

Physics 28 VOLUME 80, NUMBER 1 P H Y S I C A L R E V I E W L E T T E R S 5 JANUARY 1998 Stability of Bubble Nuclei through Shell Effects Summary: Nuclei through Shell Effects...

75

Foam shell project: Progress report  

SciTech Connect

The authors report on their work to produce a foam shell target for two possible applications: (1) as liquid-layered cryogenic target on Omega Upgrade, and (2) as a back-up design for the NIF. This target consists of a roughly 1 mm diameter and 100 {mu}m thick spherical low-density foam shell surrounding a central void. The foam will be slightly overfilled with liquid D{sub 2} or DT, the overfilled excess being symmetrically distributed on the inside of the shell and supported by thermal gradient techniques. The outside of the foam is overcoated with full density polymer which must be topologically smooth. The technology for manufacturing this style of foam shell involves microencapsulation techniques and has been developed by the Japanese at ILE. Their goal is to determine whether this technology can be successfully adapted to meet US ICF objectives. To this end a program of foam shell development has been initiated at LLNL in collaboration with both the General Atomics DOE Target Fabrication Contract Corporation and the Target Fabrication Group at LLE.

Overturf, G.; Reibold, B.; Cook, B. [Lawrence Livermore National Lab., CA (United States); Schroen-Carey, D. [WJSA (United States)

1994-03-25T23:59:59.000Z

76

Rigorous HDD Emissions Capabilities of Shell GTL Fuel  

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

Rigorous HDD Emissions Capabilities of Shell GTL Fuel Ralph A. Cherrillo & Mary Ann Dahlstrom Shell Global Solutions (US) Inc. Richard H. Clark Shell Global Solutions (UK) 11 th...

77

On Closed Shells in Nuclei  

DOE R&D Accomplishments (OSTI)

It has been suggested in the past that special numbers of neutrons or protons in the nucleus form a particularly stable configuration.{sup1} The complete evidence for this has never been summarized, nor is it generally recognized how convincing this evidence is. That 20 neutrons or protons (Ca{sup40}) form a closed shell is predicted by the Hartree model. A number of calculations support this fact.{sup2} These considerations will not be repeated here. In this paper, the experimental facts indicating a particular stability of shells of 50 and 82 protons and of 50, 82, and 126 neutrons will be listed.

Mayer, M. G.

1948-02-00T23:59:59.000Z

78

Shell Solar India | Open Energy Information  

Open Energy Info (EERE)

Shell Solar India Shell Solar India Place India Sector Solar Product Shell Solar India was created as Shell's solar energy business in India, but has been acquired by Indian privately-held company Environ Energy-Tech. References Shell Solar India[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Shell Solar India is a company located in India . References ↑ "Shell Solar India" Retrieved from "http://en.openei.org/w/index.php?title=Shell_Solar_India&oldid=350910" Categories: Clean Energy Organizations Companies Organizations Stubs What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load)

79

Thick-Shell Nanocrystal Quantum Dots  

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

Thick-Shell Nanocrystal Quantum Dots Thick-Shell Nanocrystal Quantum Dots Thick-Shell Nanocrystal Quantum Dots Colloidal nanocrystal quantum dots comprising an inner core having an average diameter of at least 1.5 nm and an outer shell, where said outer shell comprises multiple monolayers, wherein at least 30% of the quantum dots have an on-time fraction of 0.80 or greater under continuous excitation conditions for a period of time of at least 10 minutes. Available for thumbnail of Feynman Center (505) 665-9090 Email Thick-Shell Nanocrystal Quantum Dots Colloidal nanocrystal quantum dots comprising an inner core having an average diameter of at least 1.5 nm and an outer shell, where said outer shell comprises multiple monolayers, wherein at least 30% of the quantum dots have an on-time fraction of 0.80 or greater under continuous

80

The Theory of Shells and Plates  

Science Journals Connector (OSTI)

A plate and more generally a shell is a special three-dimensional body whose boundary surface has special features. Although we defer defining a shell-like body in precise terms until Sect. 4, for the purpose ...

P. M. Naghdi

1973-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" 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

Past and future of grid shell structures  

E-Print Network (OSTI)

Because of their original organic shape and the column free space that they provide, the design of grid shell structures challenges architects and structural engineers in more than one way. Very few grid shell building ...

Paoli, Céline (Céline Aude)

2007-01-01T23:59:59.000Z

82

IRAQ SHELL MAY CONTAIN SARIN  

Science Journals Connector (OSTI)

A155-MM ARTILLERY SHELL said to contain the nerve agents sarin and rigged as a roadside bomb exploded near Baghdad International Airport on May 15. The explosion caused only minor injuries and didn't contaminated the blast area. It has, however, raised ...

LOIS EMBER

2004-05-24T23:59:59.000Z

83

Tailoring magnetic properties of core/shell nanoparticles and Shouheng Sun  

E-Print Network (OSTI)

in electromagnetic and permanent magnetic applications.10,11 In such a system, the intimate contact be- tween the core and shell leads to effective exchange coupling and therefore cooperative magnetic switching coupled and magneti- zation of both core and shell reverses cooperatively. As a result, the magnetic

Liu, J. Ping

84

Evolution of the N = 28 shell closure: a test bench for nuclear forces  

E-Print Network (OSTI)

Evolution of the N = 28 shell closure: a test bench for nuclear forces O. Sorlin1 and M.-G. Porquet;The N = 28 shell closure: a test bench for nuclear forces 2 reach a value of 4.8 MeV. This effect has and 90). More generally, questions related to the evolution of nuclear forces towards the drip

Boyer, Edmond

85

MEE 452: Example 3-2 ShellShell--andand--Tube Heat Exchanger Analysis:Tube Heat Exchanger Analysis  

E-Print Network (OSTI)

properties (var. T) corrections UA, NTU & = #12;MathCAD S&T HX analysis 6 of 7 HX effectiveness = Qduty & Th minmaxminmax min ,;; ,min)()( C C NTU C UA NTU TC q q q CCCcmCcmC UA CHCpCHpH #12;Tube arrangement in shell

Kostic, Milivoje M.

86

Shell Morocco | Open Energy Information  

Open Energy Info (EERE)

Morocco Morocco Jump to: navigation, search Logo: Shell Morocco Name Shell Morocco Address Immeuble Le Zenith II Place Casablanca, Morocco Zip 20190 Product Production and Distribution of Lubricants for motorists and industries; Storage and Distribution of Oils and LPG; Marine and Aviation; Off-Shore Exploration Year founded 1922 Phone number +212 (0) 522 972727 Website http://www.shell.com/home/cont Coordinates 38.959732°, -77.3419799° 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":38.959732,"lon":-77.3419799,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

87

The Effect of Improved Fuel Economy on Vehicle Miles Traveled: Estimating the Rebound Effect Using U.S. State Data, 1966-2001  

E-Print Network (OSTI)

1979, State Energy Fuel Prices by Major Economic Sector fromon variations in the fuel price P F , 1 in which case it isempirical estimates of the fuel-price elasticities of fuel

Small, Kenneth A; Van Dender, Kurt

2005-01-01T23:59:59.000Z

88

2.081J / 16.230J Plates and Shells, Spring 2006  

E-Print Network (OSTI)

This course explores the following topics: derivation of elastic and plastic stress-strain relations for plate and shell elements; the bending and buckling of rectangular plates; nonlinear geometric effects; post-buckling ...

Wierzbicki, Tomasz

89

Shell India Pvt Ltd | Open Energy Information  

Open Energy Info (EERE)

India Pvt Ltd India Pvt Ltd Jump to: navigation, search Name Shell India Pvt. Ltd. Place New Delhi, Delhi (NCT), India Sector Services, Solar Product Delhi-based subsidiary of Royal Dutch Shell having interests in natural gas (LNG), liquefied petroleum gas (LPG), lubricants and bitumen. The firm also owns a Technology and financial shared services center. The firm is also operating in solar energy. References Shell India Pvt. Ltd.[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Shell India Pvt. Ltd. is a company located in New Delhi, Delhi (NCT), India . References ↑ "Shell India Pvt. Ltd." Retrieved from "http://en.openei.org/w/index.php?title=Shell_India_Pvt_Ltd&oldid=350907"

90

Two Dimensional Simulations of Plastic-Shell, Direct-Drive Implosions on OMEGA  

SciTech Connect

Multidimensional hydrodynamic properties of high-adiabat direct-drive plastic-shell implosions on the OMEGA laser system [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] are investigated using the multidimensional hydrodynamic code, DRACO. Multimode simulations including the effects of nonuniform illumination and target roughness indicate that shell stability during the acceleration phase plays a critical role in determining target performance. For thick shells that remain integral during the acceleration phase, target yields are significantly reduced by the combination of the long-wavelength ({ell} < 10) modes due to surface roughness and beam imbalance and the intermediate modes (20 {le} {ell} {le} 50) due to single-beam nonuniformities. The neutron-production rate for these thick shells truncates relative to one-dimensional (1-D) predictions. The yield degradation in the thin shells is mainly due to shell breakup at short wavelengths ({lambda} {approx} {Delta}, where {Delta} is the in-flight shell thickness). The neutron-rate curves for the thinner shells have significantly lower amplitudes and a fall-off that is less steep than 1-D rates. DRACO simulation results are consistent with experimental observations.

Radha, P B; Goncharov, V N; Collins, T B; Delettrez, J A; Elbaz, Y; Glebov, V Y; Keck, R L; Keller, D E; Knauer, J P; Marozas, J A; Marshall, F J; McKenty, P W; Meyerhofer, D D; Regan, S P; Sangster, T C; Shvarts, D; Skupsky, S; Srebro, Y; Town, R J; Stoeckl, C

2004-09-27T23:59:59.000Z

91

Instanton calculus in shell models of turbulence  

Science Journals Connector (OSTI)

It has been shown recently that the intermittency of the Gledzer-Ohkitani-Yamada (GOY) shell model of turbulence has to be related to singular structures whose dynamics in the inertial range includes interactions with a background of fluctuations. In this paper we propose a statistical theory of these objects by modeling the incoherent background as a Gaussian white-noise forcing of small strength ?. A general scheme is developed for constructing instantons in spatially discrete dynamical systems and the Cramér function governing the probability distribution of effective singularities of exponent z is computed up to first order in a semiclassical expansion in powers of ?. The resulting predictions are compared with the statistics of coherent structures deduced from full simulations of the GOY model at very high Reynolds numbers.

Isabelle Daumont; Thierry Dombre; Jean-Louis Gilson

2000-09-01T23:59:59.000Z

92

Nonlinear analysis of anisotropic shells of revolution  

E-Print Network (OSTI)

Modifications REFERENCES BIBLIOGRAPHY VITA 25 34 41 48 54 55 56 57 LIST OF FIGURES Figure Page l. Shell Geometry 2. Positive Direction for Oisplacements 3. Positive Direction for Rotations 4. Positive Direction for Forces . . . 5. Positive... Direction for Moments 6 . Positive Direction for Loads 7. U Displacement for Conical Shell 8. M Displacement for Conical Shell . 9. M Displacement for Spherical Cap 10. I4 Displacement for 4. 5 psi Load, Linear and Nonlinear Solution . ll. Load vs M...

Kelley, William Rhea

1970-01-01T23:59:59.000Z

93

Enduring Stockpile CMM Shell Inspection Plan (U)  

SciTech Connect

The slides are intended to serve as a high level summary of the CMM Shell Inspection Plan as presented to Pu Sustainment Legacy Pit Production IPT.

Montano, Joshua D. [Los Alamos National Laboratory; Flores, Randy A. [Los Alamos National Laboratory

2012-06-13T23:59:59.000Z

94

Mollusk Shell Nacre Ultrastructure Correlates with Environmental...  

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

was deposited. It is therefore possible that mollusk shell nacre could be used as a thermometer for modern and past climates. Once validated nacre could become a physical,...

95

The Shell Model, the Renormalization Group and the Two-Body Interaction  

E-Print Network (OSTI)

The no-core shell model and the effective interaction $V_{{\\rm low} k}$ can both be derived using the Lee-Suzuki projection operator formalism. The main difference between the two is the choice of basis states that define the model space. The effective interaction $V_{{\\rm low} k}$ can also be derived using the renormalization group. That renormalization group derivation can be extended in a straight forward manner to also include the no-core shell model. In the nuclear matter limit the no-core shell model effective interaction in the two-body approximation reduces identically to $V_{{\\rm low} k}$. The same considerations apply to the Bloch-Horowitz version of the shell model and the renormalization group treatment of two-body scattering by Birse, McGovern and Richardson.

B. K. Jennings

2005-04-25T23:59:59.000Z

96

Microstructure and mechanical property of turtle shell  

Science Journals Connector (OSTI)

The turtle shell is an amazing structure optimized through the long-term evolution by nature. This paper reports the experimental study on the mechanical property at different levels and locations and the microstructure of the shell from Trachemys scripta (Red-ear turtle) living in South China.

Wei Zhang; Chengwei Wu; Chenzhao Zhang; Zhen Chen

2012-01-01T23:59:59.000Z

97

Symmetry-dictated trucation: Solutions of the spherical shell model for heavy nuclei  

SciTech Connect

Principles of dynamical symmetry are used to simplify the spherical shell model. The resulting symmetry-dictated truncation leads to dynamical symmetry solutions that are often in quantitative agreement with a variety of observables. Numerical calculations, including terms that break the dynamical symmetries, are shown that correspond to shell model calculations for heavy deformed nuclei. The effective residual interaction is simple, well-behaved, and can be determined from basic observables. With this approach, we intend to apply the shell model in systematic fashion to all nuclei. The implications for nuclear structure far from stability and for nuclear masses and other quantities of interest in astrophysics are discussed.

Guidry, M.W. [Tennessee Univ., Knoxville, TN (United States). Dept. of Physics]|[Oak Ridge National Lab., TN (United States)

1992-12-31T23:59:59.000Z

98

Challenges for a reliable shell model description of the neutrinoless double beta decay matrix elements  

Science Journals Connector (OSTI)

Assuming that the neutrinos are Majorana particles and the neutrinoless double beta (0???) decay is observed a reliable 0??? matrix element is necessary to decide the neutrino mass hierarchy and the minimum neutrino mass. Many nuclear structure techniques including the shell model are presently used to calculate these matrix elements. In the last few years one could see a slow convergence of these results but not yet at a level of 20 several shell model effective interactions and varying other parameters finding results in a range that spans about 20In this contribution we describe challenges for obtaining reliable shell model 0??? matrix elements with emphasis to 76 Ge and 82 Se decays.

2011-01-01T23:59:59.000Z

99

Gravito-inertial modes in a differentially rotating spherical shell  

E-Print Network (OSTI)

While many intermediate- and high-mass main sequence stars are rapidly and differentially rotating, the effects of rotation on oscillation modes are poorly known. In this communication we present a first study of axisymmetric gravito-inertial modes in the radiative zone of a differentially rotating star. We consider a simplified model where the radiative zone of the star is a linearly stratified rotating fluid within a spherical shell, with differential rotation due to baroclinic effects. We solve the eigenvalue problem with high-resolution spectral computations and determine the propagation domain of the waves through the theory of characteristics. We explore the propagation properties of two kinds of modes: those that can propagate in the entire shell and those that are restricted to a subdomain. Some of the modes that we find concentrate kinetic energy around short-period shear layers known as attractors. We describe various geometries for the propagation domains, conditioning the surface visibility of the...

Mirouh, Giovanni M; Rieutord, Michel; Ballot, Jérôme

2014-01-01T23:59:59.000Z

100

Industrial mixing techniques for Hanford double-shell tanks  

SciTech Connect

Jet mixer pumps are currently the baseline technology for sludge mobilization and mixing in one-million gallon double-shell tanks at the Hanford and Savannah River Sites. Improvements to the baseline jet mixer pump technology are sought because jet mixer pumps have moving parts that may fail or require maintenance. Moreover, jet mixers are relatively expensive, they heat the waste, and, in some cases, may not mobilize enough of the sludge. This report documents a thorough literature search for commercially available applicable mixing technologies that could be used for double-shell tank sludge mobilization and mixing. Textbooks, research articles, conference proceedings, mixing experts, and the Thomas Register were consulted to identify applicable technologies. While there are many commercial methods that could be used to mobilize sludge or mix the contents of a one-million gallon tank, few will work given the geometrical constraints (e.g., the mixer must fit through a 1.07-m-diameter riser) or the tank waste properties (e.g., the sludge has such a high yield stress that it generally does not flow under its own weight). Pulsed fluid jets and submersible Flygt mixers have already been identified at Hanford and Savannah River Sites for double-shell tank mixing applications. While these mixing technologies may not be applicable for double-shell tanks that have a thick sludge layer at the bottom (since too many of these mixers would need to be installed to mobilize most of the sludge), they may have applications in tanks that do not have a settled solids layer. Retrieval projects at Hanford and other U.S. Department of Energy sites are currently evaluating the effectiveness of these mixing techniques for tank waste applications. The literature search did not reveal any previously unknown technologies that should be considered for sludge mobilization and mixing in one-million gallon double-shell tanks.

Daymo, E.A.

1997-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" 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

Synthesis of Lutetium Phosphate/Apoferritin Core-Shell Nanoparticles...  

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

Core-Shell Nanoparticles for Potential Applications in Radioimmunoimaging and Synthesis of Lutetium PhosphateApoferritin Core-Shell Nanoparticles for Potential...

102

Verification of Shell GTL Fuel as CARB Alternative Diesel | Department...  

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

Verification of Shell GTL Fuel as CARB Alternative Diesel Verification of Shell GTL Fuel as CARB Alternative Diesel Presentation given at the 2007 Diesel Engine-Efficiency &...

103

THE PYTHON SHELL FOR THE ORBIT CODE  

SciTech Connect

A development of a Python driver shell for the ORBIT simulation code is presented. The original ORBIT code uses the SuperCode shell to organize accelerator-related simulations. It is outdated, unsupported, and it is an obstacle to future code development. The necessity and consequences of replacing the old shell language are discussed. A set of core modules and extensions that are currently in PyORBIT are presented. They include particle containers, parsers for MAD and SAD lattice files, a Python wrapper for MPI libraries, space charge calculators, TEAPOT trackers, and a laser stripping extension module.

Shishlo, Andrei P [ORNL] [ORNL; Gorlov, Timofey V [ORNL] [ORNL; Holmes, Jeffrey A [ORNL] [ORNL

2009-01-01T23:59:59.000Z

104

Hanford Single-Shell Tank Integrity Program  

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

Operations Contract Hanford Single Hanford Single- -Shell Shell Hanford Single Hanford Single Shell Shell Tank Integrity Tank Integrity Program Program Herbert S Berman Herbert S Berman Herbert S. Berman Herbert S. Berman July 29, 2009 July 29, 2009 1 Page 1 Tank Operations Contract Introduction * The Hanford site's principle historic mission was plutonium production for the manufacture of nuclear weapons. * Between 1944 and 1988, the site operated nine graphite- moderated light-water production reactors to irradiate moderated, light-water, production reactors to irradiate fuel and produce plutonium. * Four large chemical separations plants were run to extract plutonium from the fuel, and a variety of laboratories, support facilities, and related infrastructure to support production

105

Working and Net Available Shell Storage Capacity  

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

Working and Net Available Shell Storage Capacity Working and Net Available Shell Storage Capacity With Data for September 2013 | Release Date: November 27, 2013 | Next Release Date: May 29, 2013 Previous Issues Year: September 2013 March 2013 September 2012 March 2012 September 2011 March 2011 September 2010 Go Containing storage capacity data for crude oil, petroleum products, and selected biofuels. The report includes tables detailing working and net available shell storage capacity by type of facility, product, and Petroleum Administration for Defense District (PAD District). Net available shell storage capacity is broken down further to show the percent for exclusive use by facility operators and the percent leased to others. Crude oil storage capacity data are also provided for Cushing, Oklahoma, an

106

Wind pressure distribution on shell structures  

E-Print Network (OSTI)

relates to both cost and safety. This study has revealed that wind pressure criteria for shell structures is not adequately covered by most building codes. Those that do exist are rather vague and sometimes erroneous. One recently published design manual...

Yancey, Kenneth Earl, Jr

1963-01-01T23:59:59.000Z

107

Finite element analysis of shells with layers  

E-Print Network (OSTI)

It is well established that thin shell structures frequently feature narrow bands of strain concentration and localized displacement irregularities referred to as boundary and internal layers. It is crucial to capture these ...

Hiller, Jean-François, 1974-

2002-01-01T23:59:59.000Z

108

Nuclear Quadrupole Moments and Nuclear Shell Structure  

DOE R&D Accomplishments (OSTI)

Describes a simple model, based on nuclear shell considerations, which leads to the proper behavior of known nuclear quadrupole moments, although predictions of the magnitudes of some quadrupole moments are seriously in error.

Townes, C. H.; Foley, H. M.; Low, W.

1950-06-23T23:59:59.000Z

109

Double shell tank waste analysis plan  

SciTech Connect

Waste analysis plan for the double shell tanks. SD-WM-EV-053 is Superseding SD-WM-EV-057.This document provides the plan for obtaining information needed for the safe waste handling and storage of waste in the Double Shell Tank Systems. In Particular it addresses analysis necessary to manage waste according to Washington Administrative Code 173-303 and Title 40, parts 264 and 265 of the Code of Federal Regulations.

Mulkey, C.H.; Jones, J.M.

1994-12-15T23:59:59.000Z

110

K-Shell Photoabsorption of Magnesium Ions  

E-Print Network (OSTI)

X-ray photoabsorption cross sections have been computed for all magnesium ions using the R-matrix method. A comparison with the other available data for Mg II- Mg X shows good qualitative agreement in general. However, for the lower ionization stages, and for singly-ionized Mg II in particular, the previous R-matrix results (Witthoeft et al. 2009; Witthoeft et al. 2011) overestimate the K-edge position due to the absence of important orbital relaxation effects in those earlier calculations, and a global shift downward in photon energy of those cross sections is therefore warranted. The resultant resonance shapes are found to be quite similar between the two R-matrix results, on the other hand. The cross sections for Mg I and Mg II are further complicated by the M-shell (n=3) occupancy. As a result, the treatment of spectator Auger decay of 1s-> np resonances using the multichannel quantum defect, optical potential method becomes problematic, and it was necessary to implement an alternative, approximate treatm...

Hasoglu, M F; Gorczyca, T W

2013-01-01T23:59:59.000Z

111

Projection Operator Formalisms and the Nuclear Shell Model  

E-Print Network (OSTI)

The shell model solve the nuclear many-body problem in a restricted model space and takes into account the restricted nature of the space by using effective interactions and operators. In this paper two different methods for generating the effective interactions are considered. One is based on a partial solution of the Schrodinger equation (Bloch-Horowitz or the Feshbach projection formalism) and other on linear algebra (Lee-Suzuki). The two methods are derived in a parallel manner so that the difference and similarities become apparent. The connections with the renormalization group are also pointed out.

B. K. Jennings

2005-04-13T23:59:59.000Z

112

Stress resultants in hyperboloid cooling tower shells subjected to foundation settlement  

SciTech Connect

The effect of differential settlement of columns supporting a natural draught hyperboloid cooling tower on the stress resultants in the tower shell is analyzed using discrete finite element modelling of the shell and the supporting base. The quadrilateral facet shell elements and 3-D beam elements are used to model the shell and the columns respectively. The stress resultants obtained due to an imposed settlement are compared with those reported earlier by other investigators. In the existing literature, the stress resultants are found using the Boussinesq equation to calculate the approximate edge loading (column forces) on the cooling tower shell due to differential settlement. It is shown in the present study that using the Boussinesq solution for the calculation of edge loading may lead to an over-estimation of the column forces and hence the stress resultants. The magnitude of stress resultants is also found to be dependent on the column flexibility. The paper also presents an investigation in which the local amplification of stress resultants in the vicinity of the shell column junction of the cooling towers (stress concentration) due to dead load and foundation settlement is studied. It is shown that the stress concentration can be severe, i.e., up to seven times the average stress resultants for dead load, and up to five times the average stress resultants for the foundation settlement. 28 refs.

Krishna Mohan Rao, S.V.; Appa Rao, T.V.S.R. [CSIR Campus, Madras (India)

1994-08-01T23:59:59.000Z

113

Quasiparticle-vibration coupling in relativistic framework: shell structure of Z=120 isotopes  

E-Print Network (OSTI)

For the first time, the shell structure of open-shell nuclei is described in a fully self-consistent extension of the covariant energy density functional theory. The approach implies quasiparticle-vibration coupling for superfluid systems. One-body Dyson equation formulated in the doubled quasiparticle space of Dirac spinors is solved for nucleonic propagators in tin isotopes which represent the reference case: the obtained energies of the single-quasiparticle levels and their spectroscopic amplitudes are in agreement with data. The model is applied to describe the shell evolution in a chain of superheavy isotopes $^{292,296,300,304}$120 and finds a rather stable proton spherical shell closure at Z = 120. An interplay of the pairing correlations and the quasiparticle-phonon coupling gives rise for a smooth evolution of the neutron shell gap between N = 172 and N = 184 neutron numbers. Vibrational corrections to the alpha decay energies reach several hundred keV and can be either positive and negative, thus also smearing the shell effects.

Elena Litvinova

2011-08-17T23:59:59.000Z

114

Nonperturbative renormalization of the neutrinoless double-beta operator in p-shell nuclei  

E-Print Network (OSTI)

We use Lee-Suzuki mappings and related techniques to construct effective two-body p-shell interactions and neutrinoless double-beta operators that exactly reproduce the results of large no-core-shell-model calculations of double-beta decay in nuclei with mass number A=6. We then apply the effective operators to the decay of nuclei with A=7, 8, and 10, again comparing with no-core calculations in much larger spaces. The results with the effective two-body operators are generally good. In some cases, however, they differ non-negligibly from the full no-core results, suggesting that three-body corrections to the decay operator in heavier nuclei may be important. An application of our procedure and related ideas to fp-shell nuclei such as 76Ge should be feasible within coupled-cluster theory.

Deepshikha Shukla; Jonathan Engel; Petr Navratil

2011-08-15T23:59:59.000Z

115

Removable inner turbine shell with bucket tip clearance control  

DOE Patents (OSTI)

A turbine includes a plurality of inner shell sections mounting first and second stage nozzle and shroud portions. The inner shell sections are pinned to an outer containment shell formed of sections to preclude circumferential movement of the inner shell relative to the outer shell and enable thermal expansion and contraction of the inner shell relative to the outer shell. Positive bucket tip clearance control is afforded by passing a thermal medium about the inner shell in heat transfer relation with the shrouds about the first and second stage bucket tips, the thermal medium being provided from a source of heating/cooling fluid independent of the turbine. Access is provided to the rotor and turbine buckets by removing the outer and inner shell sections.

Sexton, Brendan F. (Clifton Park, NY); Knuijt, Hans M. (Niskayuna, NY); Eldrid, Sacheverel Q. (Saratoga Springs, NY); Myers, Albert (Amsterdam, NY); Coneybeer, Kyle E. (Schenectady, NY); Johnson, David Martin (Ballston Lake, NY); Kellock, Iain R. (Clifton Park, NY)

2000-01-01T23:59:59.000Z

116

Curtis Frasier is the General Counsel of Shell Oil Company in the USA and Royal Dutch Shell's Upstream business throughout the Americas. He is currently  

E-Print Network (OSTI)

Oil Company in 1982, Curtis has held a number of positions within Shell's Legal Organization of Shell US Gas & Power. He has also served as a Director of Shell Oil Company, Shell Petroleum IncCurtis Frasier is the General Counsel of Shell Oil Company in the USA and Royal Dutch Shell

Zhang, Junshan

117

Fast pyrolysis of a waste fraction of high impact polystyrene (HIPS) containing brominated flame retardants in a fluidized bed reactor: The effects of various Ca-based additives (CaO, Ca(OH)2 and oyster shells) on the removal of bromine  

Science Journals Connector (OSTI)

A waste fraction of high impact polystyrene (HIPS) containing brominated flame retardants and antimony trioxide (Sb2O3) as a synergist was pyrolyzed in a bench-scale system equipped with a fluidized bed and char separation system. Experiments were carried out to observe the effects of the reaction temperature and three additives (CaO, Ca(OH)2, oyster shells) on the removal of bromine. An analysis of the pyrolysis oils obtained showed the oils were mainly composed of toluene, ethyl-benzene, styrene, cumene, ?-methylstyrene, 1,3-diphenylpropane, 1,3-diphenylbutane and (1-bromoethyl)-benzene. When the Ca-based additives were used, the concentration of styrene was markedly increased; whereas, those of ethlybenzene and cumene were reduced. The total bromine content of pyrolysis oil produced without any additive at 459 °C was about 5 wt.%. When Ca(OH)2 and oyster shells were applied, the total bromine contents of the pyrolysis oils were decreased to 1.3 and 2.7 wt.%, respectively. The antimony content in the pyrolysis oil was relatively small due to the efficient operation of the char separation system.

Su-Hwa Jung; Seon-Jin Kim; Joo-Sik Kim

2012-01-01T23:59:59.000Z

118

Working and Net Available Shell Storage Capacity  

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

Working and Net Available Shell Working and Net Available Shell Storage Capacity November 2013 With Data as of September 30, 2013 Independent Statistics & Analysis www.eia.gov U.S. Department of Energy Washington, DC 20585 U.S. Energy Information Administration | Working and Net Available Shell Storage Capacity as of September 30, 2013 This report was prepared by the U.S. Energy Information Administration (EIA), the statistical and analytical agency within the U.S. Department of Energy. By law, EIA's data, analyses, and forecasts are independent of approval by any other officer or employee of the United States Government. The views in this report therefore should not be construed as representing those of the Department of Energy or

119

Taylor Vortices in Wide Spherical Shells  

Science Journals Connector (OSTI)

It was believed that no Taylor vortices would exist in wide spherical shells with an aspect ratio of ?>0.24. In contrast, we have experimentally generated Taylor vortices in a relatively wide spherical shell with ?=0.33 using some special initial conditions. It is found that the Taylor vortices remain very stable in a range of the Reynolds number 467

M. Liu, C. Blohm, C. Egbers, P. Wulf, and H. J. Rath

1996-07-08T23:59:59.000Z

120

HANFORD DOUBLE SHELL TANK (DST) THERMAL & SEISMIC PROJECT SEISMIC ANALYSIS OF HANFORD DOUBLE SHELL TANKS  

SciTech Connect

M&D Professional Services, Inc. (M&D) is under subcontract to Pacific Northwest National Laboratory (PNNL) to perform seismic analysis of the Hanford Site double-shell tanks (DSTs) in support of a project entitled ''Double-Shell Tank (DSV Integrity Project--DST Thermal and Seismic Analyses)''. The overall scope of the project is to complete an up-to-date comprehensive analysis of record of the DST system at Hanford in support of Tri-Party Agreement Milestone M-48-14, The work described herein was performed in support of the seismic analysis of the DSTs. The thermal and operating loads analysis of the DSTs is documented in Rinker et al. (2004). The work statement provided to M&D (PNNL 2003) required that the seismic analysis of the DSTs assess the impacts of potentially non-conservative assumptions in previous analyses and account for the additional soil mass due to the as-found soil density increase, the effects of material degradation, additional thermal profiles applied to the full structure including the soil-structure response with the footings, the non-rigid (low frequency) response of the tank roof, the asymmetric seismic-induced soil loading, the structural discontinuity between the concrete tank wall and the support footing and the sloshing of the tank waste. The seismic analysis considers the interaction of the tank with the surrounding soil and the effects of the primary tank contents. The DSTs and the surrounding soil are modeled as a system of finite elements. The depth and width of the soil incorporated into the analysis model are sufficient to obtain appropriately accurate analytical results. The analyses required to support the work statement differ from previous analysis of the DSTs in that the soil-structure interaction (SSI) model includes several (nonlinear) contact surfaces in the tank structure, and the contained waste must be modeled explicitly in order to capture the fluid-structure interaction behavior between the primary tank and contained waste.

MACKEY, T.C.

2006-03-17T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" 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

Hohlraum-Driven Ignition-Like Double-Shell Implosion Experiments on Omega: Analysis and Interpretation  

SciTech Connect

An experimental campaign to study hohlraum-driven ignition-like double-shell target performance using the Omega laser facility has begun. These targets are intended to incorporate as many ignition-like properties of the proposed National Ignition Facility (NIF) double-shell ignition design [1,2] as possible, given the energy constraints of the Omega laser. In particular, this latest generation of Omega double-shells is nominally predicted to produce over 99% of the (clean) DD neutron yield from the compressional or stagnation phase of the implosion as required in the NIF ignition design. By contrast, previous double-shell experience on Omega [3] was restricted to cases where a significant fraction of the observed neutron yield was produced during the earlier shock convergence phase where the effects of mix are deemed negligibly small. These new targets are specifically designed to have optimized fall-line behavior for mitigating the effects of pusher-fuel mix after deceleration onset and, thereby, providing maximum neutron yield from the stagnation phase. Experimental results from this recent Omega ignition-like double-shell implosion campaign show favorable agreement with two-dimensional integrated hohlraum simulation studies when enhanced (gold) hohlraum M-band (2-5 keV) radiation is included at a level consistent with observations.

Amendt, P; Robey, H F; Park, H-S; Tipton, R E; Turner, R E; Milovich, J; Rowley, D; Hibbard, R; Louis, H; Wallace, R; Garbett, W; Dunne, A M; Varnum, W S; Watt, R G; Wilson, D C

2003-08-22T23:59:59.000Z

122

Shell Model for Atomistic Simulation of Lithium Diffusion in...  

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

Shell Model for Atomistic Simulation of Lithium Diffusion in Mixed MnTi Oxides. Shell Model for Atomistic Simulation of Lithium Diffusion in Mixed MnTi Oxides. Abstract: Mixed...

123

Morphology and Electronic Structure of the Oxide Shell on the...  

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

Structure of the Oxide Shell on the Surface of Iron Nanoparticles. Abstract: A iron nanoparticle exposed to air at room temperature will be instantly covered by an oxide shell of...

124

Circumstellar Dust Shells Detlef Schonberner, Matthias Steffen  

E-Print Network (OSTI)

Circumstellar Dust Shells Detlef Sch¨onberner, Matthias Steffen This research project is concerned spectra and intensity maps computed from the resulting time­dependent wind models can be compared directly as spherical grains of amor­ phous carbon with a radius of 0.05 ¯m, the adopted dust­ to­gas ratio being 1

125

Non-Planar On-Shell Diagrams  

E-Print Network (OSTI)

We initiate a systematic study of non-planar on-shell diagrams in N=4 SYM and develop powerful technology for doing so. We introduce canonical variables generalizing face variables, which make the dlog form of the on-shell form explicit. We present a general classification of arbitrary on-shell diagrams in terms of two classes of combinatorial objects: generalized matching and matroid polytopes. We propose a boundary measurement that connects general on-shell diagrams to the Grassmannian. Our proposal exhibits two important and non-trivial properties: positivity in the planar case and its generalization for non-planar diagrams, and it matches the combinatorial description of the diagrams in terms of matroid polytopes. We present a comprehensive discussion of equivalence and reductions for non-planar diagrams and explain how they are captured by the generalized matching and matroid polytopes. Interestingly, non-planar diagrams exhibit novel phenomena, such as the emergence of constraints on Pl\\"ucker coordinat...

Franco, Sebastian; Penante, Brenda; Wen, Congkao

2015-01-01T23:59:59.000Z

126

Scalar Casimir densities induced by a cylindrical shell in de Sitter spacetime  

E-Print Network (OSTI)

We evaluate the positive-frequency Wightman function, the vacuum expectation values (VEVs) of the field squared and the energy-momentum tensor for a massive scalar field with general curvature coupling for a cylindrical shell in background of dS spacetime. The field is prepared in the Bunch-Davies vacuum state and on the shell the corresponding operator obeys Robin boundary condition. In the region inside the shell and for non-Neumann boundary conditions, the Bunch-Davies vacuum is a physically realizable state for all values of the mass and curvature coupling parameter. For both interior and exterior regions, the VEVs are decomposed into boundary-free dS and shell-induced parts. We show that the shell-induced part of the vacuum energy-momentum tensor has a nonzero off-diagonal component corresponding to the energy flux along the radial direction. Unlike to the case of a shell in Minkowski bulk, for dS background the axial stresses are not equal to the energy density. In dependence of the mass and of the coefficient in the boundary condition, the vacuum energy density and the energy flux can be either positive or negative. The influence of the background gravitational field on the boundary-induced effects is crucial at distances from the shell larger than the dS curvature scale. In particular, the decay of the VEVs with the distance is power-law (monotonic or oscillatory with dependence of the mass) for both massless and massive fields. For Neumann boundary condition the decay is faster than that for non-Neumann conditions.

A. A. Saharian; V. F. Manukyan

2014-04-27T23:59:59.000Z

127

A viscoplastic model of expanding cylindrical shells subjected to internal explosive detonations  

SciTech Connect

Magnetic flux compression generators rely on the expansion of thin ductile shells to generate magnetic fields. These thin shells are filled with high explosives, which when detonated, cause the shell to expand to over 200% strain at strain-rates on the order of 10{sup 4} s{sup {minus}1}. Experimental data indicate the development and growth of multiple plastic instabilities which appear in a quasi-periodic pattern on the surfaces of the shells. These quasi-periodic instabilities are connected by localized zones of intense shear that are oriented approximately 45{degree} from the outward radial direction. The quasi-periodic instabilities continue to develop and eventually become through-cracks, causing the shell to fragment. A viscoplastic constitutive model is formulated to model the high strain-rate expansion and provide insight into the development of plastic instabilities. The formulation of the viscoplastic constitutive model includes the effects of shock heating and damage in the form of microvoid nucleation, growth, and coalescence in the expanding shell. This model uses the Johnson-Cook strength model with the Mie-Grueneisen equation of state and a modified Gurson yield surface. The constitutive model includes the modifications proposed by Tvergaard and the plastic strain controlled nucleation introduced by Neeleman. The constitutive model is implemented as a user material subroutine into ABAQUS/Explicit, which is a commercially available nonlinear explicit dynamic finite element program. A cylindrical shell is modeled using both axisymmetric and plane strain elements. Two experiments were conducted involving plane wave detonated, explosively filled, copper cylinders. Instability, displacement, and velocity data were recorded using a fast framing camera and a Fabry-Perot interferometer. Good agreement is shown between the numerical results and experimental data. An additional explosively bulged cylinder experiment was also performed and a photomicrograph of an instability is shown to provide a qualitative comparison between the experimental observations and the numerical predictions.

Martineau, R.L.

1998-04-01T23:59:59.000Z

128

projet conjoint parrain par la Fondation Shell et Shell Gabon, des chercheurs de l'Institution  

E-Print Network (OSTI)

projet conjoint parrainé par la Fondation Shell et Shell Gabon, des chercheurs de l champ pétrolifère de Rabi dans le Complexe d'Aires Protégées de Gamba, au Gabon. Le Gabon se trouve sur divers endroits du champ pétrolifère de Rabi, dans le com- plexe de Gamba, au Gabon. L'effort d

Baker, Robert J.

129

Status of shell galaxies Jean-Louis Prieur  

E-Print Network (OSTI)

Status of shell galaxies Jean-Louis Prieur European Southern Observatory, Karl-Schwarzshild-Str 2 D-ellipticity . . . . . . . . . . . . . . . . . . . . . . . . . 7 II.3 Radial distribution of the shells . . . . . . . . . . . . . . . . . . . . . . . 9 III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 IV IV. Spectroscopy of the shells 15 IV.1 Nature of the stellar population

Boyer, Edmond

130

Designing a Grid Computing Environment Shell Engine Mehmet A. Nacar  

E-Print Network (OSTI)

Designing a Grid Computing Environment Shell Engine Mehmet A. Nacar Community Grids Lab, Indiana and features of our Grid Computing Environments Shell system, or GCEShell. We view computing Grids as providing in turn be programmed through scripts. The GCEShell consists of a shell engine that serves as a container

131

Abnormal Cyclibility in Ni@Graphene Core–Shell and Yolk–Shell Nanostructures for Lithium Ion Battery Anodes  

Science Journals Connector (OSTI)

Abnormal Cyclibility in Ni@Graphene Core–Shell and Yolk–Shell Nanostructures for Lithium Ion Battery Anodes ... A new graphene-based hybrid nanostructure is designed for anode materials in lithium-ion batteries. ...

Huawei Song; Hao Cui; Chengxin Wang

2014-07-08T23:59:59.000Z

132

HANFORD DOUBLE SHELL TANK THERMAL AND SEISMIC PROJECT SEISMIC ANALYSIS OF HANFORD DOUBLE SHELL TANKS  

SciTech Connect

M&D Professional Services, Inc. (M&D) is under subcontract to Pacific Northwest National Laboratories (PNNL) to perform seismic analysis of the Hanford Site Double-Shell Tanks (DSTs) in support of a project entitled Double-Shell Tank (DST) Integrity Project - DST Thermal and Seismic Analyses. The original scope of the project was to complete an up-to-date comprehensive analysis of record of the DST System at Hanford in support of Tri-Party Agreement Milestone M-48-14. The work described herein was performed in support of the seismic analysis of the DSTs. The thermal and operating loads analysis of the DSTs is documented in Rinker et al. (2004). Although Milestone M-48-14 has been met, Revision I is being issued to address external review comments with emphasis on changes in the modeling of anchor bolts connecting the concrete dome and the steel primary tank. The work statement provided to M&D (PNNL 2003) required that a nonlinear soil structure interaction (SSI) analysis be performed on the DSTs. The analysis is required to include the effects of sliding interfaces and fluid sloshing (fluid-structure interaction). SSI analysis has traditionally been treated by frequency domain computer codes such as SHAKE (Schnabel, et al. 1972) and SASSI (Lysmer et al. 1999a). Such frequency domain programs are limited to the analysis of linear systems. Because of the contact surfaces, the response of the DSTs to a seismic event is inherently nonlinear and consequently outside the range of applicability of the linear frequency domain programs. That is, the nonlinear response of the DSTs to seismic excitation requires the use of a time domain code. The capabilities and limitations of the commercial time domain codes ANSYS{reg_sign} and MSC Dytran{reg_sign} for performing seismic SSI analysis of the DSTs and the methodology required to perform the detailed seismic analysis of the DSTs has been addressed in Rinker et al (2006a). On the basis of the results reported in Rinker et al. (2006a), it is concluded that time-domain SSI analysis using ANSYS{reg_sign} is justified for predicting the global response of the DSTs. The most significant difference between the current revision (Revision 1) of this report and the original issue (Revision 0) is the treatment of the anchor bolts that tie the steel dome of the primary tank to the concrete tank dome.

MACKEY TC; RINKER MW; CARPENTER BG; HENDRIX C; ABATT FG

2009-01-15T23:59:59.000Z

133

Elevated CO2 affects shell dissolution rate but not calcification rate in a marine snail  

Science Journals Connector (OSTI)

...Research articles 1001 60 69 70 Elevated CO2 affects shell dissolution rate but not calcification...authors contributed equally to this work. As CO2 levels increase in the atmosphere, so too...Although direct effects of moderately elevated CO2 in sea water may be of little consequence...

2010-01-01T23:59:59.000Z

134

FEW ELECTRON QUANTUM DOTS IN InAs/InP CORE SHELL NANOWIRES  

E-Print Network (OSTI)

..." Much effort is being directed at harnessing the potential power of quantum com- puting [7]. At the turn electric field (EDSR) is expected to be orders of magnitudes faster. To this effect, InAs nanowires with a thin shell of InP, are explored as a system where a quantum dot can be defined and probed electrically

Nygård, Jesper

135

Production of Hydrogen from Peanut Shells  

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

Production of Hydrogen from Peanut Shells Production of Hydrogen from Peanut Shells The goal of this project is the production of renewable hydrogen from agricultural residues, in the near-term time frame (~three years) and at a comparable cost to existing methane reforming technologies. The hydrogen produced will be blended with CNG and used to power a bus in Albany, GA. Our strategy is to produce hydrogen from biomass pyrolysis oils in conjunction with high value co-products. Activated carbon can be made from agricultural residues in a two- stage process: (1) slow pyrolysis of biomass to produce charcoal, and (2) high temperature processing to form activated carbon. The vapor by-products from the first step can be steam reformed into hydrogen. NREL has developed the technology for bio-

136

Complex shell model representation including antibound states  

Science Journals Connector (OSTI)

A generalization of the complex shell model formalism is presented that includes antibound states in the basis. These states, together with bound states, Gamow states, and the continuum background, represented by properly chosen scattering waves, form a representation in which all states are treated on the same footing. Two-particle states are evaluated within this formalism, and observable two-particle resonances are defined. The formalism is illustrated in the well-known case of Li11 in its bound ground state and in Ca70(g.s.), which is also bound. Both cases are found to have a halo structure. These halo structures are described within the generalized complex shell model. We investigated the formation of two-particle resonances in these nuclei, but no evidence of such resonances was found.

R. Id Betan; R. J. Liotta; N. Sandulescu; T. Vertse; R. Wyss

2005-11-30T23:59:59.000Z

137

Working and Net Available Shell Storage Capacity  

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

Net Available Shell Storage Capacity by PAD District as of September 30, 2013 Net Available Shell Storage Capacity by PAD District as of September 30, 2013 (Thousand Barrels) Commodity In Operation Idle 1 In Operation Idle 1 In Operation Idle 1 In Operation Idle 1 In Operation Idle 1 In Operation Idle 1 Refineries Crude Oil 17,334 831 21,870 1,721 86,629 3,468 4,655 174 39,839 1,230 170,327 7,424 Fuel Ethanol 174 - 175 1 289 - 134 - 92 - 864 1 Natural Gas Plant Liquids and Liquefied Refinery Gases 2 1,267 23 11,599 382 28,865 78 641 19 2,412 23 44,784 525 Propane/Propylene (dedicated)

138

Evolution of Shell Structure in Neutron-Rich Calcium Isotopes  

SciTech Connect

We employ interactions from chiral effective field theory and compute the binding energies and low-lying excitations of calcium isotopes with the coupled-cluster method. Effects of three-nucleon forces are included phenomenologically as in-medium two-nucleon interactions, and the coupling to the particle continuum is taken into account using a Berggren basis. The computed ground-state energies and the low-lying J =2+ states for the isotopes 42,48,50,52Ca are in good agreement with data, and we predict the excitation energy of the first J =2+ state in 54Ca at 1.9 MeV, displaying only a weak subshell closure. In the odd-mass nuclei 53,55,61Ca we find that the positive parity states deviate strongly from the naive shell model.

Hagen, G. [University of Tennessee (UTK) and Oak Ridge National Laboratory (ORNL); Hjorth-Jensen, M. [NSCL, Michigan State University/ Univ. Oslo, Norway; Jansen, G R [University of Oslo, Norway; Machleidt, R [University of Idaho; Papenbrock, T. [University of Tennessee (UTK) and Oak Ridge National Laboratory (ORNL)

2012-01-01T23:59:59.000Z

139

Jess, the Java expert system shell  

SciTech Connect

This report describes Jess, a clone of the popular CLIPS expert system shell written entirely in Java. Jess supports the development of rule-based expert systems which can be tightly coupled to code written in the powerful, portable Java language. The syntax of the Jess language is discussed, and a comprehensive list of supported functions is presented. A guide to extending Jess by writing Java code is also included.

Friedman-Hill, E.J.

1997-11-01T23:59:59.000Z

140

Coulomb energy of a proton in the relativistic nuclear shell model  

Science Journals Connector (OSTI)

We examine the Dirac equation for a proton in a nucleus, with a shell-model potential consisting of nuclear and Coulomb parts. When the Dirac equation is reduced to a Schrödinger-like equation, the effective potential W in it exhibits two Coulomb-related effects that are absent in the usual nonrelativistic treatment: (I) W contains a Coulomb-nuclear interference term; (II) W depends strongly on the proton energy, which in turn depends on the Coulomb energy. If the shell-model potential consists of a strongly attractive Lorentz scalar and a strongly repulsive Lorentz vector, effect I by itself is very large. However, effect II counteracts effect I, leaving a small yet significant decrease in the Coulomb energy as compared with its nonrelativistic counterpart.

Y. Nogami and F. M. Toyama

1990-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" from the National Library of EnergyBeta (NLEBeta).
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141

Sandia National Laboratories: Jeff Tsao participates in "Energy...  

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

ClimateECNews & EventsNewsJeff Tsao participates in "Energy Efficiency and the Rebound Effect" Workshop Jeff Tsao participates in "Energy Efficiency and the Rebound Effect"...

142

Method and Apparatus for Pasteurizing Shell Eggs Using Radio Frequency  

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

Method and Apparatus for Pasteurizing Shell Eggs Using Radio Frequency Method and Apparatus for Pasteurizing Shell Eggs Using Radio Frequency Heating" Inventors..--.. Christopher D. Brunkhorst, David J. Geveke, Andrew B. W. Bigley. This disclosure is directed to a system for pasteurizing shell eggs. The system includes an egg rotating assembly structured to rotate the egg, and electrodes that are in contact with the egg. The system is structured so that, as the rotating assembly rotates the egg, radio frequency energy is directed to the egg to pasteurize it. Nearly 200 million "shell eggs" are consumed in the United States (US) each day. "Shell eggs" are non-powdered conventional eggs that are naturally produced by hens. Shell eggs are among the most nutritious foods on earth and can be part of a healthy diet. However, some unbroken, clean, fresh

143

On the stability of thermonuclear shell sources in stars  

E-Print Network (OSTI)

We present a quantitative criterion for the thermal stability of thermonuclear shell sources. We find the thermal stability of shell sources to depend on exactly three factors: they are more stable when they are geometrically thicker, less degenerate and hotter. This confirms and unifies previously obtained results in terms of the geometry, temperature and density of the shell source, by a simplified but quantitative approach to the physics of shell nuclear burning. We present instability diagrams in the temperature-density plane for hydrogen and helium shell burning, which allow a simple evaluation of the stability conditions of such shell sources in stellar models. The performance of our stability criterion is demonstrated in various numerical models: in a 3 Msun AGB star, in helium accreting CO white dwarfs, in a helium white dwarf which is covered by a thin hydrogen envelope, and in a 1.0 Msun giant.

S. -C. Yoon; N. Langer; M. van der Sluys

2004-06-07T23:59:59.000Z

144

Duality in Off-Shell Electromagnetism  

E-Print Network (OSTI)

In this paper, we examine the Dirac monopole in the framework of Off-Shell Electromagnetism, the five dimensional U(1) gauge theory associated with Stueckelberg-Schrodinger relativistic quantum theory. After reviewing the Dirac model in four dimensions, we show that the structure of the five dimensional theory prevents a natural generalization of the Dirac monopole, since the theory is not symmetric under duality transformations. It is shown that the duality symmetry can be restored by generalizing the electromagnetic field strength to an element of a Clifford algebra. Nevertheless, the generalized framework does not permit us to recover the phenomenological (or conventional) absence of magnetic monopoles.

Martin Land

2006-03-21T23:59:59.000Z

145

Rigorous HDD Emissions Capabilities of Shell GTL Fuel | Department...  

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

GTL Fuel 2005 Diesel Engine Emissions Reduction (DEER) Conference Presentations and Posters 2005deercherillo.pdf More Documents & Publications Verification of Shell GTL Fuel...

146

Absence of Embedded Mass Shells: Cerenkov Radiation and Quantum Friction  

E-Print Network (OSTI)

We show that, in a model where a non-relativistic particle is coupled to a quantized relativistic scalar Bose field, the embedded mass shell of the particle dissolves in the continuum when the interaction is turned on, provided the coupling constant is sufficiently small. More precisely, under the assumption that the fiber eigenvectors corresponding to the putative mass shell are differentiable as functions of the total momentum of the system, we show that a mass shell could exist only at a strictly positive distance from the unperturbed embedded mass shell near the boundary of the energy-momentum spectrum.

W. De Roeck; J. Froehlich; A. Pizzo

2010-01-05T23:59:59.000Z

147

Analytical and numerical development on vibration of shells.  

E-Print Network (OSTI)

??The subject of free vibration analysis of thin cylindrical shells is one that extends well back into the last century. In general, the computational methods… (more)

Zhang, Lei

2005-01-01T23:59:59.000Z

148

Shell Solar GmbH formerly Siemens und Shell Solar GmbH | Open Energy  

Open Energy Info (EERE)

GmbH formerly Siemens und Shell Solar GmbH GmbH formerly Siemens und Shell Solar GmbH Jump to: navigation, search Name Shell Solar GmbH (formerly Siemens und Shell Solar GmbH) Place Munich, Bavaria, Germany Zip 80807 Sector Solar Product Manufacturer and distributor of solar energy equipment and products. Coordinates 48.136415°, 11.577531° 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":48.136415,"lon":11.577531,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

149

Shell model level structure of 216Fr  

Science Journals Connector (OSTI)

Sources of 220Ac in secular equilibrium with 221Pa were produced using the reaction 209Bi(18O,3n)224Pa. The alpha decay of 220Ac and coincident gamma and electron spectra were used to study the level structure of 216Fr. The levels in 216Fr can be interpreted in terms of the ?(h9/2)9/25?(g9/2)9/23, ?(h9/2)04(f7/2)7/2?(g9/2)9/23, and ?(h9/2)9/25?(g9/2)02(i11/2)11/2 shell model configurations. The alpha decay hindrance factors of the ground state to ground state transitions in the sequence 224Pa?220Ac?216Fr?212At suggest the collapse of quadrupole-octupole Nilsson orbitals into the more degenerate shell model orbitals. The sequence of hindrance factors in this odd chain are mirrored in the corresponding odd proton and odd neutron sequences beginning with 223Pa and 223Th, respectively.

R. K. Sheline; C. F. Liang; P. Paris; A. Gizon

1997-03-01T23:59:59.000Z

150

Novel Aharonov-Bohm-like effect: Detectability of the vector potential in a solenoidal configuration with a ferromagnetic core covered by superconducting lead, and surrounded by a thin cylindrical shell of aluminum  

E-Print Network (OSTI)

The flux as measured by the Josephson effect in a SQUID-like configuration with a ferromagnetic core inserted into its center, is shown to be sensitive to the vector potential arising from the central ferromagnetic core, even when the core is covered with a superconducting material that prevents any magnetic field lines from ever reaching the perimeter of the SQUID-like configuration. This leads to a macroscopic, Aharonov-Bohm-like effect that is observable in an asymmetric hysteresis loop in the response of the SQUID-like configuration to an externally applied magnetic field.

R. Y. Chiao

2012-06-23T23:59:59.000Z

151

SPR Awards Exchange Contract to Shell Trading | Department of Energy  

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

Awards Exchange Contract to Shell Trading Awards Exchange Contract to Shell Trading SPR Awards Exchange Contract to Shell Trading May 10, 2007 - 12:55pm Addthis Deliveries to Begin in August WASHINGTON, DC - The U.S. Department of Energy (DOE) today awarded a contract to Shell Trading for exchange of 8.7 million barrels of royalty oil produced from the Gulf Coast for crude oil meeting the quality specifications of the Strategic Petroleum Reserve (SPR). The exchange oil will be delivered to two SPR sites, West Hackberry, Louisiana and Bryan Mound, Texas. The offer submitted by Shell Trading represented the highest value of specification-grade oil for the Reserve. Deliveries are expected to begin in August 2007 at a modest rate of approximately 50,000 barrels per day for a period of six months. The contract terms apply royalty-in-kind exchange provisions that require

152

Method to produce large, uniform hollow spherical shells  

DOE Patents (OSTI)

The invention is a method to produce large uniform hollow spherical shells by (1) forming uniform size drops of heat decomposable or vaporizable material, (2) evaporating the drops to form dried particles, (3) coating the dried particles with a layer of shell forming material and (4) heating the composite particles to melt the outer layer and to decompose or vaporize the inner particle to form an expanding inner gas bubble. The expanding gas bubble forms the molten outer layer into a shell of relatively large diameter. By cycling the temperature and pressure on the molten shell, nonuniformities in wall thickness can be reduced. The method of the invention is utilized to produce large uniform spherical shells, in the millimeter to centimeter diameter size range, from a variety of materials and of high quality, including sphericity, concentricity and surface smoothness, for use as laser fusion or other inertial confinement fusion targets as well as other applications.

Hendricks, C.D.

1983-09-26T23:59:59.000Z

153

Process to make core-shell structured nanoparticles  

DOE Patents (OSTI)

Disclosed is a process for making a composite material that contains core-shell structured nanoparticles. The process includes providing a precursor in the form of a powder a liquid and/or a vapor of a liquid that contains a core material and a shell material, and suspending the precursor in an aerosol gas to produce an aerosol containing the precursor. In addition, the process includes providing a plasma that has a hot zone and passing the aerosol through the hot zone of the plasma. As the aerosol passes through the hot zone of the plasma, at least part of the core material and at least part of the shell material in the aerosol is vaporized. Vapor that contains the core material and the shell material that has been vaporized is removed from the hot zone of the plasma and allowed to condense into core-shell structured nanoparticles.

Luhrs, Claudia; Phillips, Jonathan; Richard, Monique N

2014-01-07T23:59:59.000Z

154

L-Shell Fluorescence Yields of Pt, Tl, and Pb  

Science Journals Connector (OSTI)

Partial L-shell fluorescence yields for three heavy elements have been measured using an x-ray coincidence counting method. Vacancies in the K shell of the atom are produced either by K-electron capture or internal conversion of a nuclear gamma ray in the K shell. The coincidence rate between the K and L x rays observed after the creation of the K vacancy determines the partial fluorescence yield, ?KL. This quantity is defined as the fluorescence yield of those vacancies in the L shell created by K?1 and K?2 x-ray emission. In some cases, it was also possible to determine the partial fluorescence yield, ?LL of the L shell following L-electron capture. The results obtained are in reasonable agreement with previous measurements. The relationship between ?KL, ?LL, and the fluorescence yields of individual L subshells is discussed.

R. C. Jopson; Hans Mark; C. D. Swift

1962-12-15T23:59:59.000Z

155

Pemex to acquire interest in Shell Texas refinery  

SciTech Connect

This paper reports that Petroleos Mexicanos and Shell Oil Co. have signed a memorandum of understanding to form a joint refining venture involving Shell's 225,000 b/d Deer Park, Tex., refinery. Under the agreement, Mexico's state owned oil company is to purchase a 50% interest in the refinery, and Shell is to sell Pemex unleaded gasoline on a long term basis. Under the venture, Shell and Pemex plan to add undisclosed conversion and upgrading units tailored to process heavy Mexican crude. The revamp will allow Pemex to place more than 100,000 b/d of Mayan heavy crude on the U.S. market. Mayan accounts for 70% of Mexico's crude oil exports. In turn, Shell will sell Pemex as much as 45,000 b/d of unleaded gasoline to help meet Mexico's rapidly growing demand.

Not Available

1992-08-31T23:59:59.000Z

156

Jacobi shape transition in fp shell nuclei  

Science Journals Connector (OSTI)

Jacobi shape transition from noncollective oblate to super or hyperdeformed collective prolate or triaxial shape taking place in rotating nuclei as in the case of gravitating rotating stars is studied in fp shell nuclei 44Ti, 48Cr, 52Fe, and 56Ni. The cranked Nilsson-Strutinsky method is used to detect such transition. The method of tuning the angular velocity to get fixed spin is utilized in these calculations. Pairing is not taken into account since Jacobi transition occurs only at very high spin where pairing correlations would have already vanished. Our results show that all the four nuclei considered in this work are good candidates for detecting the Jacobi shape transition.

G. Shanmugam; V. Ramasubramanian; S. N. Chintalapudi

2001-05-10T23:59:59.000Z

157

Double Shell Tank (DST) Utilities Specification  

SciTech Connect

This specification establishes the performance requirements and provides the references to the requisite codes and standards to he applied during the design of the Double-Shell Tank (DST) Utilities Subsystems that support the first phase of waste feed delivery (WFD). The DST Utilities Subsystems provide electrical power, raw/potable water, and service/instrument air to the equipment and structures used to transfer low-activity waste (LAW) and high-level waste (HLW) to designated DST staging tanks. The DST Utilities Subsystems also support the equipment and structures used to deliver blended LAW and HLW feed from these staging tanks to the River Protection Project (RPP) Privatization Contractor facility where the waste will be immobilized. This specification is intended to be the basis for new projects/installations. This specification is not intended to retroactively affect previously established project design criteria without specific direction by the program.

SUSIENE, W.T.

2000-04-27T23:59:59.000Z

158

Empirical proton-neutron interactions near closed shells: A simple shell-model approach  

Science Journals Connector (OSTI)

We point out that the proton-neutron residual interaction is able to account for the recently observed properties in the empirical interaction energies between the last odd proton and neutron in nuclei adjacent to closed shells. Using zero-range forces, the specific difference between the average particle-particle and particle-hole interaction matrix elements is the major factor. We extend the arguments to cover also nuclei with two valence proton and two valence neutron configurations outside of a closed shell (we treat both two-particle two-particle, two-hole two-hole, and two-particle two-hole situations). Here we derive the particular binding energy contribution due to the proton-neutron interaction and give applications to heavy nuclei.

K. Heyde; C. De Coster; J. Schietse

1994-05-01T23:59:59.000Z

159

Nuclear energy density optimization: Shell structure  

E-Print Network (OSTI)

Nuclear density functional theory is the only microscopical theory that can be applied throughout the entire nuclear landscape. Its key ingredient is the energy density functional. In this work, we propose a new parameterization UNEDF2 of the Skyrme energy density functional. The functional optimization is carried out using the POUNDerS optimization algorithm within the framework of the Skyrme Hartree-Fock-Bogoliubov theory. Compared to the previous parameterization UNEDF1, restrictions on the tensor term of the energy density have been lifted, yielding a very general form of the energy density functional up to second order in derivatives of the one-body density matrix. In order to impose constraints on all the parameters of the functional, selected data on single-particle splittings in spherical doubly-magic nuclei have been included into the experimental dataset. The agreement with both bulk and spectroscopic nuclear properties achieved by the resulting UNEDF2 parameterization is comparable with UNEDF1. While there is a small improvement on single-particle spectra and binding energies of closed shell nuclei, the reproduction of fission barriers and fission isomer excitation energies has degraded. As compared to previous UNEDF parameterizations, the parameter confidence interval for UNEDF2 is narrower. In particular, our results overlap well with those obtained in previous systematic studies of the spin-orbit and tensor terms. UNEDF2 can be viewed as an all-around Skyrme EDF that performs reasonably well for both global nuclear properties and shell structure. However, after adding new data aiming to better constrain the nuclear functional, its quality has improved only marginally. These results suggest that the standard Skyrme energy density has reached its limits and significant changes to the form of the functional are needed.

M. Kortelainen; J. McDonnell; W. Nazarewicz; E. Olsen; P. -G. Reinhard; J. Sarich; N. Schunck; S. M. Wild; D. Davesne; J. Erler; A. Pastore

2013-12-06T23:59:59.000Z

160

Cofiring Lignite with Hazelnut Shell and Cotton Residue in a Pilot-Scale Fluidized Bed Combustor  

Science Journals Connector (OSTI)

The absence of studies on cofiring of indigenous lignite with hazelnut shell/cotton residue blends in fluid bed combustors on one hand and the recent trend in utilization of biomass with local reserves in industry and utility boilers on the other necessitate investigation of combustion and emission characteristics of these fuel blends. ... However, the effect of recycle on gaseous emissions from combustion of Turkish lignites with high ash, volatile matter, and sulfur contents has not been investigated to date. ...

Zuhal Gogebakan; Nevin Selçuk

2008-03-26T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" 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.
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to obtain the most current and comprehensive results.


161

Corrections to the Neutrinoless Double-Beta-Decay Operator in the Shell Model  

E-Print Network (OSTI)

We use diagrammatic perturbation theory to construct an effective shell-model operator for the neutrinoless double-beta decay of 82Se. The starting point is the same Bonn-C nucleon-nucleon interaction that is used to generate the Hamiltonian for recent shell-model calculations of double-beta decay. After first summing high-energy ladder diagrams that account for short-range correlations and then adding diagrams of low order in the G matrix to account for longer-range correlations, we fold the two-body matrix elements of the resulting effective operator with transition densities from the recent shell-model calculation to obtain the overall nuclear matrix element that governs the decay. Although the high-energy ladder diagrams suppress this matrix element at very short distances as expected, they enhance it at distances between one and two fermis, so that their overall effect is small. The corrections due to longer-range physics are large, but cancel one another so that the fully corrected matrix element is comparable to that produced by the bare operator. This cancellation between large and physically distinct low-order terms indicates the importance of a reliable nonperturbative calculation.

Jonathan Engel; Gaute Hagen

2009-04-10T23:59:59.000Z

162

Recent Developments in No-Core Shell-Model Calculations  

SciTech Connect

We present an overview of recent results and developments of the no-core shell model (NCSM), an ab initio approach to the nuclear many-body problem for light nuclei. In this aproach, we start from realistic two-nucleon or two- plus three-nucleon interactions. Many-body calculations are performed using a finite harmonic-oscillator (HO) basis. To facilitate convergence for realistic inter-nucleon interactions that generate strong short-range correlations, we derive effective interactions by unitary transformations that are tailored to the HO basis truncation. For soft realistic interactions this might not be necessary. If that is the case, the NCSM calculations are variational. In either case, the ab initio NCSM preserves translational invariance of the nuclear many-body problem. In this review, we, in particular, highlight results obtained with the chiral two- plus three-nucleon interactions. We discuss efforts to extend the applicability of the NCSM to heavier nuclei and larger model spaces using importance-truncation schemes and/or use of effective interactions with a core. We outline an extension of the ab initio NCSM to the description of nuclear reactions by the resonating group method technique. A future direction of the approach, the ab initio NCSM with continuum, which will provide a complete description of nuclei as open systems with coupling of bound and continuum states is given in the concluding part of the review.

Navratil, P; Quaglioni, S; Stetcu, I; Barrett, B R

2009-03-20T23:59:59.000Z

163

Absorption spectra of CdSe-ZnS core-shell quantum dots at high photon energies : experiment and modeling  

E-Print Network (OSTI)

Absorption spectra of CdSe-ZnS core-shell quantum dots at high photon energies : experiment Tata Institute of Fundamental Research Homi Bhabha Road, Mumbai 400005, India Abstract Absorption. In agreement with previous reports, the absorption coefficient at energies 1 eV above the effective bandgap

Ghosh, Sandip

164

The fabrication of double shell targets for NOVA  

SciTech Connect

At scales appropriate to the National Ignition Facility, calculations indicate double shell capsules reach ignition conditions with room temperature fuel. Los Alamos is laying the groundwork for these double shell ignition targets with a preliminary campaign on Nova. The target design features a 260 {micro}m O.D. inner glass capsule with an I.D. of approximately 200 {micro}m, containing deuterium gas, centered inside a machined polymer shell. The central capsule was supported either with a 30 mg/cc foam or with two polymer films, each less than 0.1 {micro}m in thickness. The materials, machining, assembly, and characterization of the targets are discussed.

Duke, J.R.; Elliott, N.E.; Moore, J.E.; Gomez, V.M.; Manzanares, R.; Rivera, G.; Watt, R.; Varnum, W.S.; Gobby, P.L. [Los Alamos National Lab., NM (United States)

1999-03-01T23:59:59.000Z

165

Progress toward Ignition with Noncryogenic Double-Shell Capsules  

SciTech Connect

Inertial confinement fusion implosions using capsules with two concentric shells separated by a low density region (double shells) are reported which closely follow one dimensional (1D) radiatively driven hydrodynamics simulations. Capsule designs which mitigate Au M -band radiation asymmetries appear to correspond more closely to 1D simulations than targets lacking mitigation of hohlraum drive M -band nonuniformities. One capsule design achieves over 50% of the unperturbed 1D calculated yield at a convergence ratio of 25.5, comparable to that of a double-shell design for an ignition capsule at the National Ignition Facility. (c) 2000 The American Physical Society.

Varnum, W. S.; Delamater, N. D.; Evans, S. C.; Gobby, P. L.; Moore, J. E.; Wallace, J. M.; Watt, R. G.; Colvin, J. D.; Turner, R.; Glebov, V. (and others) [and others

2000-05-29T23:59:59.000Z

166

Spherical cloaking using multilayer shells of ordinary dielectrics  

SciTech Connect

An approach for spherical cloaking using multilayer ordinary dielectric materials has been developed. The total scattering cross section (TSCS) of the spherical multilayer shell with metallic core was derived based on the Mie theory. The dielectric profile of the shell was optimized to minimize the TSCS of the cloaked target. The specific directions, at which the scattering could be practically eliminated, were detected. The influence of the target size and the dielectric material loss on the cloaking efficiency was analyzed. It was shown that the cloaking efficiency for larger targets could be improved by employing lossy materials in the shell.

Wang, Xiaohui; Chen, Fang; Semouchkina, Elena, E-mail: esemouch@mtu.edu [Department of Electrical and Computer Engineering, Michigan Technological University, Houghton, MI, 49931 (United States)] [Department of Electrical and Computer Engineering, Michigan Technological University, Houghton, MI, 49931 (United States)

2013-11-15T23:59:59.000Z

167

Energy transfers in shell models for MHD turbulence  

E-Print Network (OSTI)

A systematic procedure to derive shell models for MHD turbulence is proposed. It takes into account the conservation of ideal quadratic invariants such as the total energy, the cross-helicity and the magnetic helicity as well as the conservation of the magnetic energy by the advection term in the induction equation. This approach also leads to simple expressions for the energy exchanges as well as to unambiguous definitions for the energy fluxes. When applied to the existing shell models with nonlinear interactions limited to the nearest neighbour shells, this procedure reproduces well known models but suggests a reinterpretation of the energy fluxes.

T. Lessinnes; M. K. Verma; D. Carati

2008-07-31T23:59:59.000Z

168

Unibody core–shell smart polymer as a theranostic nanoparticle for drug delivery and MR imaging  

Science Journals Connector (OSTI)

Abstract Developing novel multifunctional nanoparticles (NPs) with robust preparation, low cost, high stability, and flexible functionalizability is highly desirable. This study provides an innovative platform, termed unibody core–shell (UCS), for this purpose. UCS is comprised of two covalent-bonded polymers differed only by the functional groups at the core and the shell. By conjugating Gd3+ at the stable core and encapsulating doxorubicin (Dox) at the shell in a pH-sensitive manner, we developed a theranostic \\{NPs\\} (UCS-Gd-Dox) that achieved a selective drug release (75% difference between pH 7.4 and 5.5) and MR imaging (r1 = 0.9 and 14.5 mm?1 s?1 at pH 7.4 and 5.5, respectively). The anti-cancer effect of UCS-Gd-Dox is significantly better than free Dox in tumor-bearing mouse models, presumably due to enhanced permeability and retention effect and pH-triggered release. To the best of our knowledge, this is the simplest approach to obtain the theranostic \\{NPs\\} with Gd-conjugation and Dox doping.

Lin-Chen Ho; Chao-Hsiung Hsu; Chung-Mao Ou; Chia-Wei Wang; Tsang-Pai Liu; Lian-Pin Hwang; Yung-Ya Lin; Huan-Tsung Chang

2015-01-01T23:59:59.000Z

169

Shell evolution in neutron-rich carbon isotopes: Unexpected enhanced role of neutron-neutron correlation  

E-Print Network (OSTI)

Full shell-model diagonalization has been performed to study the structure of neutron-rich nuclei around $^{20}$C. We investigate in detail the roles played by the different monopole components of the effective interaction in the evolution of the N=14 shell in C, N and O isotopes. It is found that the relevant neutron-neutron monopole terms, $V^{nn}_{d_{5/2}d_{5/2}}$ and $V^{nn}_{s_{1/2}s_{1/2}}$, contribute significantly to the reduction of the N=14 shell gap in C and N isotopes in comparison with that in O isotopes. The origin of this unexpectedly large effect, which is comparable with (sometimes even larger than) that caused by the proton-neutron interaction, is related to the enhanced configuration mixing in those nuclei due to many-body correlations. Such a scheme is also supported by the large B(E2) value in the nucleus $^{20}$C which has been measured recently.

Cenxi Yuan; Chong Qi; Furong Xu

2012-09-25T23:59:59.000Z

170

ARIES-IV Nested Shell Blanket Design  

SciTech Connect

The ARIES-IV Nested Shell Blanket (NSB) Design is an alternate blanket concept of the ARIES-IV low activation helium-cooled reactor design. The reference design has the coolant routed in the poloidal direction and the inlet and outlet plena are located at the top and bottom of the torus. The NSB design has the high velocity coolant routed in the toroidal direction and the plena are located behind the blanket. This is of significance since the selected structural material is SiC-composite. The NSB is designed to have key high performance components with characteristic dimensions of no larger than 2 m. These components can be brazed to form the blanket module. For the diverter design, we eliminated the use of W as the divertor coating material by relying on the successful development of the gaseous divertor concept. The neutronics and thermal-hydraulic performance of both blanket concepts are similar. The selected blanket and divertor configurations can also meet all the projected structural, neutronics and thermal-hydraulics design limits and requirements. With the selected blanket and divertor materials, the design has a level of safety assurance rate of I (LSA-1), which indicates an inherently safe design.

Wong, C.P.C.; Redler, K.; Reis, E.E.; Will, R. [General Atomics, San Diego, CA (United States); Cheng, E. [TSI Research, Inc. (United States); Hasan, C.M.; Sharafat, S. [California Univ., Los Angeles, CA (United States)

1993-11-01T23:59:59.000Z

171

Core–Shell Catalysts in PEMFC Cathode Environments  

Science Journals Connector (OSTI)

A wide variety of core–shell electrocatalysts have been investigated in recent years, showing benefits for the oxygen reduction reaction (ORR) in acid electrolytes. Particularly high values of activity per gram o...

Sarah Ball

2013-01-01T23:59:59.000Z

172

Modeling Dust Jets And Shells From Comet Hale-Bopp  

Science Journals Connector (OSTI)

Persistent jet and shell structures from comet Hale-Bopp showing gradual changes in the shapes ... declination. Lower limits on the dust and gas production rates at various epochs are presented.

R. Vasundhara; Pavan Chakraborty; Andreas Hänel; Erwin Heiser

173

Sandia National Laboratories: III-Nitride core-shell nanowire...  

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

Sector III-Nitride core-shell nanowire arrayed solar cells On April 27, 2012, in Energy, Energy Efficiency, News, News & Events, Solid-State Lighting In a new EFRC-supported...

174

String Gas Shells, their Dual Radiation and Hedgehog Signature Control  

E-Print Network (OSTI)

We search for spherically symmetric, stationary solutions with a string gas shell as a source. The requirement of a uniform newtonian potential, or constancy of the 00 component of the metric, implies the existence of a "dual" radiation, which we argue can be interpreted as representing the virtual quantum fluctuations that stabilize the shell. A string hedgehog can be introduced also into the solution. For zero or small hedgehog strength the string gas shell is of a regular nature, while the dual radiation is of a spacelike nature. For higher hedgehog strengths however the radiation "materializes" and becomes timelike while the string gas shell becomes space like. The significance of these solutions for the quantum theory is discussed.

E. I. Guendelman

2009-03-12T23:59:59.000Z

175

A linear dynamic analysis of stiffened shells of revolution by the matrix displacement method  

E-Print Network (OSTI)

displacement approach and Houbolt's numerical method of integration. The stiffened shell structure considered here is a combination of shell structure with either meridional or circumferential stiff- eners or both. The structure is idealized... Survey Shell Structures. Stiffened Shell Structures. Objective Scope of Investigation. 1 4 4 8 13 15 II GENERAL DESCRIPTION OF THE MATRIX DISPLACEMENT METHOD. . . . . . . . . . . . . . . . . . . . . 17 Static Analysis Dynamic Analysis. 17...

Hoover, Charlie Doll

2012-06-07T23:59:59.000Z

176

Developing a Secure Grid Computing Environment Shell Engine: Containers and Services  

E-Print Network (OSTI)

Developing a Secure Grid Computing Environment Shell Engine: Containers and Services Mehmet A consists of a shell engine that serves as a container environment for managing GCEShell commands, which environments. 2. GCE SHELL ENGINE The shell engine is the core application that interprets commands, runs

177

Fabrication of precision glass shells by joining glass rods  

DOE Patents (OSTI)

A method for making uniform spherical shells. The present invention allows niform hollow spheres to be made by first making a void in a body of material. The material is heated so that the viscosity is sufficiently low so that the surface tension will transform the void into a bubble. The bubble is allowed to rise in the body until it is spherical. The excess material is removed from around the void to form a spherical shell with a uniform outside diameter.

Gac, Frank D. (Los Alamos, NM); Blake, Rodger D. (Santa Fe, NM); Day, Delbert E. (Rolla, MO); Haggerty, John S. (Lincoln, MA)

1988-01-01T23:59:59.000Z

178

Off-energy-shell behavior of realistic potential models  

SciTech Connect

The behavior of the fully-off-the-energy-shell T matrices for the Reid-soft-core and Paris-80 potentials are studied for a variety of partial waves, both uncoupled and coupled. Although the potentials have qualitatively different structures in both coordinate space and momentum space, the resulting off-energy-shell behavior is very similar in the range of energy and momentum relevant to low and medium energy nuclear physics.

Redish, E.F.; Stricker-Bauer, K.

1987-08-01T23:59:59.000Z

179

Automatic Detection of Expanding HI Shells Using Artificial Neural Networks  

E-Print Network (OSTI)

The identification of expanding HI shells is difficult because of their variable morphological characteristics. The detection of HI bubbles on a global scale therefore never has been attempted. In this paper, an automatic detector for expanding HI shells is presented. The detection is based on the more stable dynamical characteristics of expanding shells and is performed in two stages. The first one is the recognition of the dynamical signature of an expanding bubble in the velocity spectra, based on the classification of an artificial neural network. The pixels associated with these recognized spectra are identified on each velocity channel. The second stage consists in looking for concentrations of those pixels that were firstly pointed out, and to decide if they are potential detections by morphological and 21-cm emission variation considerations. Two test bubbles are correctly detected and a potentially new case of shell that is visually very convincing is discovered. About 0.6% of the surveyed pixels are identified as part of a bubble. These may be false detections, but still constitute regions of space with high probability of finding an expanding shell. The subsequent search field is thus significantly reduced. We intend to conduct in the near future a large scale HI shells detection over the Perseus Arm using our detector.

Anik Daigle; Gilles Joncas; Marc Parizeau; Marc-Antoine Miville-Deschenes

2003-04-17T23:59:59.000Z

180

Interference effects in L-shell atomic double photoionization  

E-Print Network (OSTI)

excess energies, it can be used as a practical tool at a much wider range of photon energies. In the caseV excess energy (Kheifets & Bray 2000). Given this successful application, one would also hope to use the Gaussian ansatz to describe DPI in other atomic targets beyond He. Lithium is the simplest atom

Kheifets, Anatoli

Note: This page contains sample records for the topic "rebound effect shell" 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

Nuclear shell effect and collinear tripartition of nuclei  

E-Print Network (OSTI)

A possibility of formation of the three reaction products having comparable masses at the spontaneous fission of $^{252}$Cf is theoretically explored. This work is aimed to study the mechanism leading to observation of the reaction products with masses $M_1=$136---140 and $M_2=$68---72 in coincidence by the FOBOS group in JINR. The same type of ternary fission decay has been observed in the reaction $^{235}$U(n$_{\\rm th}$,fff). The potential energy surface for the ternary system forming a collinear nuclear chain is calculated for the wide range of mass and charge numbers of constituent nuclei. The results of the PES for the tripartition of $^{252}$Cf(sf,fff) shows, that we have favorable dynamical conditions for the formation of fragments with mass combinations of clusters $^{68-70}$Ni with $^{130-132}$Sn and with missing cluster $^{48-52}$Ca.

Nasirov, A K; Tashkhodjaev, R B

2014-01-01T23:59:59.000Z

182

On a Nanoscopically-Informed Shell Theory of Single-Wall Carbon Nanotubes  

E-Print Network (OSTI)

This paper proposes a bottom-up sequence of modeling steps leading to a nanoscopically informed continuum, and as such macroscopic, theory of single-walled carbon nanotubes (SWCNTs). We provide a description of the geometry of the two most representative types of SWCNTs, armchair (A-) and zigzag (Z-), of their modules and of their elementary bond units. We believe ours to be the simplest shell theory that accounts accurately for the linearly elastic response of both A- and Z- CNTs. In fact, our theory can be shown to fit SWCNTs of whatever chirality; its main novel feature is perhaps the proposition of chirality-dependent concepts of effective thickness and effective radius.

Chandrajit Bajaj; Antonino Favata; Paolo Podio-Guidugli

2011-11-19T23:59:59.000Z

183

Full $fp$-shell study of even-even $^{48-56}$Ti isotopes  

E-Print Network (OSTI)

The level schemes and transition rates {\\em B}({\\em E}2;$\\uparrow$) of eve-even $^{48-56}$Ti isotopes were studied by performing large-scale shell model calculations with FPD6 and GXPF1 effective interactions. Excellent agreement were obtained by comparing the first 2$^{+}$ level for all isotopes with the recently available experimental data, but studying the transition strengths {\\em B}({\\em E}2; 0$^+_{g.s.} \\to2^+_1$) for all Ti isotopes using constant proton-neutron effective charges prove the limitations of the present large-scale calculations to reproduce the experiment in detail.

F. A. Majeed; A. A. Auda

2006-02-02T23:59:59.000Z

184

Coupling highly excited nuclei to the atomic shell in dense astrophysical plasmas  

E-Print Network (OSTI)

In dense astrophysical plasmas, neutron capture populates highly excited nuclear states close to the neutron threshold. The impact of additional low-energy nuclear excitations via coupling to the atomic shell on the ability of the so-formed compound nucleus to retain the captured neutron is investigated. We focus on the mechanism of nuclear excitation by electron capture in plasmas characterized by electron fluxes typical for the slow neutron capture process of stellar nucleosynthesis. The small effect of this further excitation on the neutron capture and gamma decay sequence relevant for nucleosynthesis is quantified and compared to the corresponding effect of an additional low-energy photoexcitation step.

Stephan Helmrich; Katja Spenneberg; Adriana Pálffy

2014-04-25T23:59:59.000Z

185

Coupling highly excited nuclei to the atomic shell in dense astrophysical plasmas  

E-Print Network (OSTI)

In dense astrophysical plasmas, neutron capture populates highly excited nuclear states close to the neutron threshold. The impact of additional low-energy nuclear excitations via coupling to the atomic shell on the ability of the so-formed compound nucleus to retain the captured neutron is investigated. We focus on the mechanism of nuclear excitation by electron capture in plasmas characterized by electron fluxes typical for the slow neutron capture process of stellar nucleosynthesis. The small effect of this further excitation on the neutron capture and gamma decay sequence relevant for nucleosynthesis is quantified and compared to the corresponding effect of an additional low-energy photoexcitation step.

Helmrich, Stephan; Pálffy, Adriana

2014-01-01T23:59:59.000Z

186

Stress evaluation of the primary tank of a double-shell underground storage tank facility  

SciTech Connect

A facility called the Multi-Function Waste Tank Facility (MWTF) is being designed at the Department of Energy`s Hanford site. The MWTF is expected to be completed in 1998 and will consist of six underground double-shell waste storage tanks and associated systems. These tanks will provide safe and environmentally acceptable storage capacity to handle waste generated during single-shell and double-shell tank safety mitigation and remediation activities. This paper summarizes the analysis and qualification of the primary tank structure of the MWTF, as performed by ICF Kaiser Hanford during the latter phase of Title 1 (Preliminary) design. Both computer finite element analysis (FEA) and hand calculations methods based on the so-called Tank Seismic Experts Panel (TSEP) Guidelines were used to perform the analysis and evaluation. Based on the evaluations summarized in this paper, it is concluded that the primary tank structure of the MWTF satisfies the project design requirements. In addition, the hand calculations performed using the methodologies provided in the TSEP Guidelines demonstrate that, except for slosh height, the capacities exceed the demand. The design accounts for the adverse effect of the excessive slosh height demand, i.e., inadequate freeboard, by increasing the hydrodynamic wall and roof pressures appropriately, and designing the tank for such increased pressures.

Atalay, M.B. [ICF Kaiser Engineers, Inc., Oakland, CA (United States); Stine, M.D. [ICF Kaiser Hanford Co., Richland, WA (United States); Farnworth, S.K. [Westinghouse Hanford Co., Richland, WA (United States)

1994-12-01T23:59:59.000Z

187

Spectra of Open-Shell Nuclei with Padé-Resummed Degenerate Perturbation Theory  

E-Print Network (OSTI)

We apply degenerate many-body perturbation theory at high orders for the ab-initio description of ground states and excitation spectra of open-shell nuclei using soft realistic nucleon-nucleon interactions. We derive a recursive formulation of standard degenerate many-body perturbation theory that enables us to evaluate order-by-order perturbative energy and state corrections up to the 30th order. We study 6,7-Li as test cases using a similarity renormalization group (SRG) evolved nucleon-nucleon interaction from chiral effective field theory. The simple perturbation series exhibits a strong, often oscillatory divergence, as was observed previously for ground states of closed-shell nuclei. Even for very soft interactions resulting from SRG evolutions up to large flow parameter, i.e. low momentum scales, the perturbation series still diverges. However, a resummation of the perturbation series via Pad\\'e approximants yields very stable and converged ground and excited-state energies in very good agreement with exact no-core shell-model calculations for the same model space.

Joachim Langhammer; Robert Roth; Christina Stumpf

2012-11-29T23:59:59.000Z

188

Coulomb energy of uniformly-charged spheroidal shell systems  

E-Print Network (OSTI)

We provide exact expressions for the electrostatic energy of uniformly-charged prolate and oblate spheroidal shells. We find that uniformly-charged prolate spheroids of eccentricity greater than 0.9 have lower Coulomb energy than a sphere of the same area. For the volume-constrained case, we find that a sphere has the highest Coulomb energy among all spheroidal shells. Further, we derive the change in the Coulomb energy of a uniformly-charged shell due to small, area-conserving perturbations on the spherical shape. Our perturbation calculations show that buckling-type deformations on a sphere can lower the Coulomb energy. Finally, we consider the possibility of counterion condensation on the spheroidal shell surface. We employ a Manning-Oosawa two-state model approximation to evaluate the renormalized charge and analyze the behavior of the equilibrium free energy as a function of the shell's aspect ratio for both area-constrained and volume-constrained cases. Counterion condensation is seen to favor the forma...

Jadhao, Vikram; Thomas, Creighton K; de la Cruz, Monica Olvera

2015-01-01T23:59:59.000Z

189

Shell model Monte Carlo investigation of rare earth nuclei  

Science Journals Connector (OSTI)

We utilize the shell model Monte Carlo method to study the structure of rare earth nuclei. This work demonstrates the first systematic full oscillator shell with intruder calculations in such heavy nuclei. Exact solutions of a pairing plus quadrupole Hamiltonian are compared with the static path approximation in several dysprosium isotopes from A=152 to 162, including the odd mass A=153. Some comparisons are also made with Hartree-Fock-Bogoliubov results from Baranger and Kumar. Basic properties of these nuclei at various temperatures and spin are explored. These include energy, deformation, moments of inertia, pairing channel strengths, band crossing, and evolution of shell model occupation numbers. Exact level densities are also calculated and, in the case of 162Dy, compared with experimental data.

J. A. White; S. E. Koonin; D. J. Dean

2000-02-14T23:59:59.000Z

190

Low-Z Shell Pellet Experiments on DIII-D  

SciTech Connect

Small (o.d. = 1.8 mm, t = 0.37 mm) polystyrene shells filled with either pressurized argon gas or boron powder have been fired into DIII-D plasmas for disruption mitigation experiments. The pellet shells were observed to burn up at rhoapprox =0.5, roughly consistent with ablation rate calculations. Pellet slowing from 350 m/s down to 100 m/s was observed, which is not well-understood at present. Negligible plasma current contraction or MHD onset were seen as a result of the shell burn-up in the plasma edge, consistent with calculations. The pellet payloads were observed to ionize rapidly in the pellet vicinity (<1 cm radius) and rapid (<15 ms) mixing through the plasma core was observed.

Hollmann, E. M.; Yu, J. H. [University of California-San Diego, La Jolla, CA, 92093-0417 (United States); James, A. N.; Parks, P. B.; Evans, T. E.; Humphreys, D. A.; Jackson, G. L.; La Haye, R. J.; Strait, E. J.; West, W. P.; Wu, W. [General Atomics, PO Box 85608, San Diego, CA 92186-5608 (United States); Jernigan, T. C. [Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, TN 37831 (United States)

2009-09-10T23:59:59.000Z

191

Toward open-shell nuclei with coupled-cluster theory  

SciTech Connect

We develop a method based on equation-of-motion coupled-cluster theory to describe properties of open-shell nuclei with A{+-}2 nucleons outside a closed shell. We perform proof-of-principle calculations for the ground states of the helium isotopes {sup 3-6}He and the first excited 2{sup +} state in {sup 6}He. The comparison with exact results from matrix diagonalization in small model spaces demonstrates the accuracy of the coupled-cluster methods. Three-particle-one-hole excitations of {sup 4}He play an important role for the accurate description of {sup 6}He. For the open-shell nucleus {sup 6}He, the computational cost of the method is comparable with the coupled-cluster singles-and-doubles approximation while its accuracy is similar to the coupled-cluster with singles, doubles, and triples excitations.

Jansen, G. R.; Hjorth-Jensen, M. [Department of Physics and Center of Mathematics for Applications, University of Oslo, N-0316 Oslo (Norway); Hagen, G. [Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States); Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996 (United States); Papenbrock, T. [Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States); Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996 (United States); GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, D-64291 Darmstadt (Germany); Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany)

2011-05-15T23:59:59.000Z

192

Ge/Si core/multi shell heterostructure FETs  

SciTech Connect

Concentric heterostructured materials provide numerous design opportunities for engineering strain and interfaces, as well as tailoring energy band-edge combinations for optimal device performance. Key to the realization of such novel device concepts is the complete understanding and full control over their growth, crystal structure, and hetero-epitaxy. We report here on a new route for synthesizing Ge/Si core/multi-shell heterostructure nanowires that eliminate Au seed diffusion on the nanowire sidewalls by engineering the interface energy density difference. We show that such control over core/shell synthesis enable experimental realization of heterostructure FET devices beyond those available in the literature with enhanced transport characteristics. We provide a side-by-side comparison on the transport properties of Ge/Si core/multi-shell nanowires grown with and without Au diffusion and demonstrate heterostructure FETs with drive currents that are {approx} 2X higher than record results for p-type FETs.

Picraux, Samuel T [Los Alamos National Laboratory; Dayeh, Shadi A [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

193

Modelica-based modelling and simulation of dry-expansion shell-and-tube evaporators working with alternative refrigerant mixtures  

Science Journals Connector (OSTI)

A new methodology of intermediate complexity level is developed to model the dry-expansion shell and U-tube evaporators. The model has a reasonable level of accuracy and uses fundamental physical principles in a distributed parameters approach capable of detecting the complex circuit of the shell-side flow. This level of details is necessary to simulate accurately the zeotropic refrigerant mixtures evaporation. Using Modelica language gives a heat exchanger model with a generic flow arrangement. The model is experimentally validated using a standard shell-and-tube evaporator working with HFC-134a. Three distinct working fluids, pure HFC-134a, R-407C, and a specially selected glide matching refrigerant mixture are simulated in the same heat source duty with different shell-and-tube configurations. Three different gas superheat values are also taken into account. The total amount of irreversibility is considered by calculating the total exergy losses. It is concluded that the effect of the temperature profile of any refrigerant mixture can be substantial on the relative performance of a particular heat exchanger configuration compared to counter-flow configuration.

Khattar Assaf; Assaad Zoughaib; Denis Clodic

2011-01-01T23:59:59.000Z

194

K-Shell-Hole Production, Multiple-Hole Production, Charge-Transfer, and Antisymmetry  

E-Print Network (OSTI)

-shell electron can occur. For example, after making a K-shell hole an L-shell electron may be knocked into it, or an L-shell vacancy may be produced and the K-shell electron promoted to that vacancy in the "Fermi sea" of the target-atom orbitals, In 1973 a.... If one is working in first-order pertur- bation theory E-shell-hole production is correctly obtained by calculating the process for the K elec- tron to be lifted above the "Fermi sea" of occupied target orbitals, i.e., the other electrons play a...

Reading, John F.; Ford, A. Lewis.

1980-01-01T23:59:59.000Z

195

Summary compilation of shell element performance versus formulation.  

SciTech Connect

This document compares the finite element shell formulations in the Sierra Solid Mechanics code. These are finite elements either currently in the Sierra simulation codes Presto and Adagio, or expected to be added to them in time. The list of elements are divided into traditional two-dimensional, plane stress shell finite elements, and three-dimensional solid finite elements that contain either modifications or additional terms designed to represent the bending stiffness expected to be found in shell formulations. These particular finite elements are formulated for finite deformation and inelastic material response, and, as such, are not based on some of the elegant formulations that can be found in an elastic, infinitesimal finite element setting. Each shell element is subjected to a series of 12 verification and validation test problems. The underlying purpose of the tests here is to identify the quality of both the spatially discrete finite element gradient operator and the spatially discrete finite element divergence operator. If the derivation of the finite element is proper, the discrete divergence operator is the transpose of the discrete gradient operator. An overall summary is provided from which one can rank, at least in an average sense, how well the individual formulations can be expected to perform in applications encountered year in and year out. A letter grade has been assigned albeit sometimes subjectively for each shell element and each test problem result. The number of A's, B's, C's, et cetera assigned have been totaled, and a grade point average (GPA) has been computed, based on a 4.0-system. These grades, combined with a comparison between the test problems and the application problem, can be used to guide an analyst to select the element with the best shell formulation.

Heinstein, Martin Wilhelm; Hales, Jason Dean (Idaho National Laboratory, Idaho Falls, ID); Breivik, Nicole L.; Key, Samuel W. (FMA Development, LLC, Great Falls, MT)

2011-07-01T23:59:59.000Z

196

An improved shell of revolution element utilizing cubic displacement functions  

E-Print Network (OSTI)

-curved sheli of revolu Lion element developed by Stricklin, et al. ' uses polynomial displac ment functions similar 11 to Eq. (I. l) in the m. ridional direction and a Fourier series in the cir "umferential direction. For axisyrmetric loadinc, this fi. Id..., and e are defined in Fig. 2-1. The rotations of the normal to the shell about the o- and s -axes are defined by e&3 and e23, respectively. Using th, strains described in Eq, (2 . 4), the strai n energy expression for orthotropi c shells may...

Mebane, Paul Mitchell

2012-06-07T23:59:59.000Z

197

O(4) Expansion of Off-Shell Scattering Amplitudes  

Science Journals Connector (OSTI)

Using an off-mass-shell approach, we develop a method for the O(4) expansion of the scattering amplitude for two unequal-mass, arbitrary-spin particles. General-spin spherical harmonics for O(4) are constructed. With the aid of these spherical harmonics, the M amplitude is decomposed into O(4) partial waves. The prescription for obtaining the on-mass-shell helicity states from the O(4) partial waves is given. This O(4) expansion, which is valid even away from t=0, is useful in simplifying the Bethe-Salpeter equation.

W. R. Frazer, F. R. Halpern, H. M. Lipinski, and D. R. Snider

1968-12-25T23:59:59.000Z

198

Isospin-mixing corrections for fp-shell Fermi transitions  

Science Journals Connector (OSTI)

Isospin-mixing corrections for superallowed Fermi transitions in fp-shell nuclei are computed within the framework of the shell model. The study includes three nuclei that are part of the set of nine accurately measured transitions as well as five cases that are expected to be measured in the future at radioactive-beam facilities. We also include some new calculations for C10. With the isospin-mixing corrections applied to the nine accurately measured ft values, the conserved-vector-current hypothesis and the unitarity condition of the Cabbibo-Kobayashi-Maskawa matrix are tested.

W. E. Ormand and B. A. Brown

1995-11-01T23:59:59.000Z

199

Analysis Procedures for Double-Shell Target Concentricity and Wall Thickness  

SciTech Connect

The LLNL Target Fabrication Team (TFT) asked the Center for Non-Destructive Characterization (CNDC) to use CNDC's KCAT or Xradia's Micro computed tomography (CT) system to collect three-dimensional (3D) tomographic data of a set of double-shell targets and determine, among other items, the following: (1) the concentricity of the outer surface of the inner shell with respect to the inner surface of the outer shell with an accuracy of 1-2 micrometers, and (2) the wall thickness uniformity of the outer shell with an accuracy of 1-2 micrometers. The CNDC used Xradia's Micro CT system to collect the data. Bill Brown performed the concentricity analysis, and John Sain performed the wall thickness uniformity analysis. Harry Martz provided theoretical guidance, and Dan Schneberk contributed technical (software) support. This document outlines the analysis procedures used in each case. The double-shell targets, as shown in Figures 1 and 2, consist of an inner shell (or capsule), a two-piece spherical aerogel intermediary shell, and a two-piece spherical outer shell. The three elements are designed and fabricated to be concentric--with the aerogel shell acting as a spacer between the inner shell and outer shell--with no to minimum air gaps in the final assembly. The outer diameters of the aerogel and outer shells are 444 and 550 micrometers, respectively, so the wall thickness of the outer shell is 53 micrometers.

Sain, J D; Brown, W D; Martz, H E; Schneberk, D J

2006-03-02T23:59:59.000Z

200

Shell Model for Atomistic Simulation of Lithium Diffusion in Mixed Mn/Ti Oxides  

SciTech Connect

Mixed Mn/Ti oxides present attractive physicochemical properties such as their ability to accommodate Li for application in Li-ion batteries. In this work, atomic parameters for Mn were developed to extend an existing shell model of the Li-Ti-O system and allow simulations of pure and lithiated Mn and mixed Mn/Ti oxide polymorphs. The shell model yielded good agreement with experimentally-derived structures (i.e. lattice parameters and inter-atomic distances) and represented an improvement over existing potential models. The shell model was employed in molecular dynamics (MD) simulations of Li diffusion in the 1×1 c direction channels of LixMn1 yTiyO2 with the rutile structure, where 0 ? x ? 0.25 and 0 ? y ? 1. In the infinite dilution limit, the arrangement of Mn and Ti ions in the lattice was found to have a significant effect on the activation energy for Li diffusion in the c channels due to the destabilization of half of the interstitial octahedral sites. Anomalous diffusion was demonstrated for Li concentrations as low as x = 0.125, with a single Li ion positioned in every other c channel. Further increase in Li concentration showed not only the substantial effect of Li-Li repulsive interactions on Li mobility but also their influence on the time dependence of Li diffusion. The results of the MD simulations can inform intrinsic structure-property relationships for the rational design of improved electrode materials for Li-ion batteries.

Kerisit, Sebastien N.; Chaka, Anne M.; Droubay, Timothy C.; Ilton, Eugene S.

2014-10-23T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" 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

Radiation Efficiency of Water-Window Cherenkov Sources Using Atomic Shell Resonances  

Science Journals Connector (OSTI)

We developed simple theory of Cherenkov radiation at atomic resonances in the X-ray water window for L-shells in 5 trans-oxigen elements and proposed K-shell resonance in liquid...

Kaplan, Alexander E; Shkolnikov, Peter L

202

TWC Committee: Draft Advice re: Double-Shell Tank AY-102, v.4  

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

Larsen Page 1 of 2 Draft Advice re: Double-Shell Tank AY-102 and Leaking Single-Shell Tanks Background: The U.S. Department of Energy - Office of River Protection (DOE-ORP)...

203

Comparison of direct plating versus filtering of egg shells inoculated with Salmonella typhimurium  

E-Print Network (OSTI)

Comparison of enumeration of egg shell bacterial load by a conventional direct plating method and a neoteric filtering method was evaluated. Egg shells were inoculated with approximately 10³ S. typhimurium organisms. Initial experiments evaluated...

Reynolds, Paige Lea

2012-06-07T23:59:59.000Z

204

E-Print Network 3.0 - atomic shells m Sample Search Results  

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

edges, the calculations have been performed for clusters size up to 99 atoms (eight atomic shells... absorption spectnun. With two and three shells (17 and 29 atoms) the main...

205

E-Print Network 3.0 - atomic shells k Sample Search Results  

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

edges, the calculations have been performed for clusters size up to 99 atoms (eight atomic shells... absorption spectnun. With two and three shells (17 and 29 atoms) the main...

206

E-Print Network 3.0 - atomic shells l Sample Search Results  

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

edges, the calculations have been performed for clusters size up to 99 atoms (eight atomic shells... absorption spectnun. With two and three shells (17 and 29 atoms) the main...

207

Shell Gas to Liquids in the context of a Future Fuel Strategy...  

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

Shell Gas to Liquids in the context of a Future Fuel Strategy - Technical Marketing Aspects Shell Gas to Liquids in the context of a Future Fuel Strategy - Technical Marketing...

208

QED E ects on Inner Shells of Heavy W. R. Johnson  

E-Print Network (OSTI)

QED E#11;ects on Inner Shells of Heavy Atoms W. R. Johnson #3; Department of Physics, University on this subject by Johnson and Cheng. [2] The experimental binding energy of a K-shell electron in a heavy atom

Johnson, Walter R.

209

Hollow Core-Shell Structured Porous Si-C Nanocomposites for Li...  

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

Hollow Core-Shell Structured Porous Si-C Nanocomposites for Li-Ion Battery Anodes. Hollow Core-Shell Structured Porous Si-C Nanocomposites for Li-Ion Battery Anodes. Abstract:...

210

Double Shell Tank AY-102 Radioactive Waste Leak Investigation  

SciTech Connect

PowerPoint. The objectives of this presentation are to: Describe Effort to Determine Whether Tank AY-102 Leaked; Review Probable Causes of the Tank AY-102 Leak; and, Discuss Influence of Leak on Hanford’s Double-Shell Tank Integrity Program.

Washenfelder, Dennis J.

2014-04-10T23:59:59.000Z

211

The instrumented dynamic perforation test applied to a composite shell  

E-Print Network (OSTI)

The instrumented dynamic perforation test applied to a composite shell S. Pattofatto, H. Tsitsiris Wilson, F-94230 Cachan, France Abstract. Perforation tests are commonly used on composites but give limited results. In this study, a single layer of a thermoplastic woven composite is tested at high

Paris-Sud XI, Université de

212

A wind–shell interaction model for multipolar planetary nebulae  

Science Journals Connector (OSTI)

......imprint of instabilities and atmospheric turbulence in the shells...Compared to other common noise generators, this algorithm has the additional...and, possibly, about the atmospheric turbulence in the stellar...Kawara K., Yamamura I., Waters L. B. F. M. AA (1996......

W. Steffen; N. Koning; A. Esquivel; G. García-Segura; Ma. T. García-Díaz; J. A. López; M. Magnor

2013-01-01T23:59:59.000Z

213

Unitary neutron matter in the on-shell limit  

E-Print Network (OSTI)

We compute the Bertsch parameter for neutron matter by using nucleon-nucleon interactions that are fully diagonal in momentum space. We analyze the on-shell limit with the similarity renormalization group and compare the results for a simple separable toy model to realistic calculations with high precision $NN$ potentials.

Enrique Ruiz Arriola; Sergio Szpigel; Varese Salvador Timoteo

2014-12-05T23:59:59.000Z

214

Organized thiol functional groups in mesoporous core shell colloids  

SciTech Connect

The co-condensation in situ of tetraethoxysilane (TEOS) and mercaptopropyltrimethoxysilane (MPTMS) using cetyltrimethylammonium bromide (CTAB) as a template results in the synthesis of multilayered mesoporous structured SiO{sub 2} colloids with 'onion-like' chemical environments. Thiol groups were anchored to an inner selected SiO{sub 2} porous layer in a bilayered core shell particle producing different chemical regions inside the colloidal layered structure. X-Ray Photoelectron Spectroscopy (XPS) shows a preferential anchoring of the -SH groups in the double layer shell system, while porosimetry and simple chemical modifications confirm that pores are accessible. We can envision the synthesis of interesting colloidal objects with defined chemical environments with highly controlled properties. - Graphical abstract: Mesoporous core shell SiO{sub 2} colloids with organized thiol groups. Highlights: Black-Right-Pointing-Pointer Double shell mesoporous silica colloids templated with CTAB. Black-Right-Pointing-Pointer Sequential deposition of mesoporous SiO{sub 2} layers with different chemistries. Black-Right-Pointing-Pointer XPS shows the selective functionalization of mesoporous layers with thiol groups.

Marchena, Martin H. [Gerencia Quimica, Centro Atomico Constituyentes, Comision Nacional de Energia Atomica (CNEA), Avda. Gral. Paz 1499, B1650KNA Buenos Aires (Argentina); Granada, Mara [Centro Atomico Bariloche-CNEA, 8400 San Carlos de Bariloche (Argentina); Instituto Balseiro-Centro Atomico Bariloche-CNEA, San Carlos de Bariloche 8400 (Argentina); Bordoni, Andrea V. [Gerencia Quimica, Centro Atomico Constituyentes, Comision Nacional de Energia Atomica (CNEA), Avda. Gral. Paz 1499, B1650KNA Buenos Aires (Argentina); Joselevich, Maria [Asociacion Civil Expedicion Ciencia, Cabrera 4948, C1414BGP Buenos Aires (Argentina); Troiani, Horacio [Centro Atomico Bariloche-CNEA, 8400 San Carlos de Bariloche (Argentina); Instituto Balseiro-Centro Atomico Bariloche-CNEA, San Carlos de Bariloche 8400 (Argentina); Williams, Federico J. [DQIAQyF-INQUIMAE FCEN, Universidad de Buenos Aires, Ciudad Universitaria, Pabellon II, C1428EHA Buenos Aires (Argentina); Wolosiuk, Alejandro, E-mail: wolosiuk@cnea.gov.ar [Gerencia Quimica, Centro Atomico Constituyentes, Comision Nacional de Energia Atomica (CNEA), Avda. Gral. Paz 1499, B1650KNA Buenos Aires (Argentina)

2012-03-15T23:59:59.000Z

215

Nitrogen recombination lines and abundance in nova shells  

SciTech Connect

The observed intensities of N II lines in the DQ Her, CP Pup, and T Aur nova shells are compared with theoretical predictions. It is concluded that the relative intensities can be explained with excitation by recombination. The nitrogen abundances obtained from the line intensities relative to hydrogen have values about 400 to 700 times the solar abundance. 27 refs.

Escalante, V.; Dalgarno, A. (Universidad Nacional Autonoma de Mexico, Coyoacan (Mexico) Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA))

1991-03-01T23:59:59.000Z

216

Fabrication of magnetite/silica/titania core-shell nanoparticles  

Science Journals Connector (OSTI)

Fe3O4/SiO2/TiO2 core-shell nanoparticles were synthesized via a sol-gel method with the aid of sonication. Fe3O4 nanoparticles were being encapsulated within discrete silica nanospheres, ...

Suh Cem Pang; Sze Yun Kho; Suk Fun Chin

2012-01-01T23:59:59.000Z

217

Wilson lines and gauge invariant off-shell amplitudes  

E-Print Network (OSTI)

We study matrix elements of Fourier-transformed straight infinite Wilson lines as a way to calculate gauge invariant tree-level amplitudes with off-shell gluons. The off-shell gluons are assigned "polarization vectors" which (in the Feynman gauge) are transverse to their off-shell momenta and define the direction of the corresponding Wilson line operators. The infinite Wilson lines are first regularized to prove the correctness of the method. We have implemented the method in a computer FORM program that can calculate gluonic matrix elements of Wilson line operators automatically. In addition we formulate the Feynman rules that are convenient in certain applications, e.g. proving the Ward identities. Using both the program and the Feynman rules we calculate a few examples, in particular the matrix elements corresponding to gauge invariant $g^{*}g^{*}g^{*}g$ and $g^{*}g^{*}g^{*}g^{*}g$ processes. An immediate application of the approach is in the high energy scattering, as in a special kinematic setup our results reduce to the form directly related to Lipatov's vertices. Thus the results we present can be directly transformed into Lipatov's vertices, in particular into $RRRP$ and $RRRRP$ vertices with arbitrary "orientation" of reggeized gluons. Since the formulation itself is not restricted to high-energy scattering, we also apply the method to a decomposition of an ordinary on-shell amplitude into a set of gauge invariant objects.

Piotr Kotko

2014-03-19T23:59:59.000Z

218

Shell Future Fuels and CO2 | Open Energy Information  

Open Energy Info (EERE)

Shell Future Fuels and CO2 Shell Future Fuels and CO2 Jump to: navigation, search Name Shell Future Fuels and CO2 Place Glasgow, Scotland, United Kingdom Zip G1 9BG Sector Hydro, Hydrogen Product UK-based division of Shell's Oil Products business active in the hydrogen & CCS sectors as a developer of technology. Coordinates 55.857809°, -4.242511° 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":55.857809,"lon":-4.242511,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

219

Evaluation of SAFT/T-SAFT Technology for the Inspection of Hanford's Double Shell Waste Tank Knuckle Regions  

SciTech Connect

Results of the examinations conducted at Pacific Northwest National Laboratory provided a firm engineering basis for establishing the proof-of-principle effectiveness for utilizing a combination of pulse-echo Synthetic Aperture Focusing Technique (SAFT) and tandem-SAFT (T-SAFT) inspection methodologies as applied to the problem of flaw detection, localization, and sizing in Hanford's double shell waste tank knuckle region and beyond.

Pardini, Allan F.; Diaz, Aaron A.

2000-09-14T23:59:59.000Z

220

Invariant Gibbs measures of the energy for shell models of turbulence; the inviscid and viscous cases  

E-Print Network (OSTI)

Gaussian measures of Gibbsian type are associated with some shell models of 3D turbulence; they are constructed by means of the energy, a conserved quantity for the 3D inviscid and unforced shell model. We prove the existence of a unique global flow for a stochastic viscous shell model and a global flow for the deterministic inviscid shell model, with the property that these Gibbs measures are invariant for these flows.

Hakima Bessaih; Benedetta Ferrario

2011-03-10T23:59:59.000Z

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


221

The inuence of symbiont photosynthesis on the boron isotopic composition of foraminifera shells  

E-Print Network (OSTI)

The in£uence of symbiont photosynthesis on the boron isotopic composition of foraminifera shells Ba of symbiont photosynthetic activity on the boron isotopic composition of shell calcite. Under low light (reduced photosynthetic rates) the boron isotopic composition of the tests is 1.5x lower compared to shells

Zeebe, Richard E.

222

Boussinesq convection and motions of boundary spheres in a rotating spherical shell  

E-Print Network (OSTI)

RIMS­1772 Boussinesq convection and motions of boundary spheres in a rotating spherical shell #12; Boussinesq convection and motions of boundary spheres in a rotating spherical shell Keiji Kimura; Abstract Boussinesq thermal convection in rotating spheres or spherical shells has been investigated

223

Boussinesq convection and motions of boundary spheres in a rotating spherical shell  

E-Print Network (OSTI)

RIMS-1772 Boussinesq convection and motions of boundary spheres in a rotating spherical shell #12;Boussinesq convection and motions of boundary spheres in a rotating spherical shell Keiji Kimura Boussinesq thermal convection in rotating spheres or spherical shells has been investigated for over half

224

Energy transfer in nanowire solar cells with photon-harvesting shells C. H. Peters,a  

E-Print Network (OSTI)

Energy transfer in nanowire solar cells with photon-harvesting shells C. H. Peters,a A. R. Guichard; published online 23 June 2009 The concept of a nanowire solar cell with photon-harvesting shells are bonded to the surface of the SiNWs forming a thin shell. They absorb the low-energy photons

McGehee, Michael

225

Atomic and electronic shells of Al77 X. G. Gong,1,2  

E-Print Network (OSTI)

Atomic and electronic shells of Al77 X. G. Gong,1,2 D. Y. Sun,2,1 and Xiao-Qian Wang2 1 Institute shell structures for the experimentally characterized Al77 . The onionlike Al77 structure can be described by a stable Al13 inner core covered by a two-layer atomic shell. The stability of Al77

Gong, Xingao

226

Polarimetric Remote Sensing in the Visible to Near Infrared James R. Shell II  

E-Print Network (OSTI)

Polarimetric Remote Sensing in the Visible to Near Infrared by James R. Shell II B.S. Physics Title of Dissertation: Polarimetric Remote Sensing in the Visible to Near Infrared I, James R. Shell II Remote Sensing in the Visible to Near Infrared by James R. Shell II Submitted to the Chester F. Carlson

Salvaggio, Carl

227

Thin-shell bubbles and information loss problem in anti de Sitter background  

E-Print Network (OSTI)

We study the motion of thin-shell bubbles and their tunneling in anti de Sitter (AdS) background. We are interested in the case when the outside of a shell is a Schwarzschild-AdS space (false vacuum) and the inside of it is an AdS space with a lower vacuum energy (true vacuum). If a collapsing true vacuum bubble is created, classically it will form a Schwarzschild-AdS black hole. However, this collapsing bubble can tunnel to a bouncing bubble that moves out to spatial infinity. Then, although the classical causal structure of a collapsing true vacuum bubble has the singularity and the event horizon, quantum mechanically the wavefunction has support for a history without any singularity nor event horizon which is mediated by the non-perturbative, quantum tunneling effect. This may be regarded an explicit example that shows the unitarity of an asymptotic observer in AdS, while a classical observer who only follows the most probable history effectively lose information due to the formation of an event horizon.

Misao Sasaki; Dong-han Yeom

2014-12-25T23:59:59.000Z

228

Efficiency, effectiveness and implementation feasibility of energy efficiency rebates: The “Renove” plan in Spain  

Science Journals Connector (OSTI)

Abstract State-sponsored incentive policies frequently include subsidies or rebates for the purchase of more efficient appliances. However, more research is required into the effects of this tool in isolation. A case in point is the so-called “Renove” plan in Spain. First, the inefficiency losses (dead-weight losses) associated with energy efficiency rebates must be taken into account. Such a policy may also encourage the large-scale purchasing of energy-efficient appliances, which may finally result in an increase in electricity consumption (rebound effect). Furthermore, although a subsidy is more widely accepted than other tools from social and political viewpoints, especially than taxes, the fiscal consolidation challenge faced by many countries reduces the scope for environmental policy measures on the expenditure side of the budget and strengthens the need to use taxes to meet the agreed policy objectives. This paper shows that the current application of the Spanish “Renove” plan with rebates on the dishwasher market for energy efficient appliances generates some welfare losses, a rebound effect and a considerable deficit in public budgets. The paper examines and assesses the effect of different combinations of taxes and rebates in the case of dishwashers in Spain based on their performance in terms of economic efficiency, environmental effectiveness and implementation feasibility.

Ibon Galarraga; Luis M. Abadie; Alberto Ansuategi

2013-01-01T23:59:59.000Z

229

Large-scale shell-model calculations for unnatural-parity high-spin states in neutron-rich Cr and Fe isotopes  

E-Print Network (OSTI)

We investigate unnatural-parity high-spin states in neutron-rich Cr and Fe isotopes using large-scale shell-model calculations. These shell-model calculations are carried out within the model space of $fp$-shell + $0g_{9/2}$ + $1d_{5/2}$ orbits with the truncation allowing $1\\hbar\\omega$ excitation of a neutron. The effective Hamiltonian consists of GXPF1Br for $fp$-shell orbits and $V_{\\rm MU}$ with a modification for the other parts. The present shell-model calculations can describe and predict the energy levels of both natural- and unnatural-parity states up to the high-spin states in Cr and Fe isotopes with $N\\le35$. The total energy surfaces present the prolate deformations on the whole and indicate that the excitation of one neutron into the $0g_{9/2}$ orbit plays the role of enhancing the prolate deformation. For the positive(unnatural)-parity states in odd-mass Cr and Fe isotopes, their energy levels and prolate deformations indicate the decoupling limit of the particle-plus-rotor model. We have found...

Togashi, Tomoaki; Utsuno, Yutaka; Otsuka, Takaharu; Honma, Michio

2014-01-01T23:59:59.000Z

230

Spin-Cast Deposition of CdSe-CdS Core-Shell Colloidal Quantum Dots on Doped GaAs Substrates: Structural and Optical Characterization  

Science Journals Connector (OSTI)

The detailed study of the effects of spin recipe and GaAs substrate doping (i.e., semi-insulating, n-type, or p-type) on the structural and optical properties of spin-cast CdSe-CdS core-shell CQDs provides insight into the surface adsorption and charge ... Keywords: Charge transfer, colloidal quantum dots, hybrid junctions, photoluminescence

A. D. Stiff-Roberts; Wanming Zhang; Jian Xu; Hongying Peng; H. O. Everitt

2007-07-01T23:59:59.000Z

231

Electrical insulation system for the shell-vacuum vessel and poloidal field gap in the ZTH machine  

SciTech Connect

The electrical insulation systems for the ZTH machine have many unusual design problems. The poloidal field gap insulation must be capable of conforming to poloidal and toroidal contours, provide a 25 kV hold off, and sufficiently adhere to the epoxy back fill between the overlapping conductors. The shell-vacuum vessel system will use stretchable and flexible insulation along with protective hats, boots and sleeves. The shell-vacuum vessel system must be able to withstand a 12.5 kV pulse with provision for thermal insulation to limit the effects of the 300{degrees}C vacuum vessel during operation and bakeout. Methodology required to provide the electrical protection along with testing data and material characteristics will be presented. 7 figs.

Reass, W.A.; Ballard, E.O.

1989-01-01T23:59:59.000Z

232

Development of two mix model postprocessors for the investigation of shell mix in indirect drive implosion cores  

SciTech Connect

The presence of shell mix in inertial confinement fusion implosion cores is an important characteristic. Mixing in this experimental regime is primarily due to hydrodynamic instabilities, such as Rayleigh-Taylor and Richtmyer-Meshkov, which can affect implosion dynamics. Two independent theoretical mix models, Youngs' model and the Haan saturation model, were used to estimate the level of Rayleigh-Taylor mixing in a series of indirect drive experiments. The models were used to predict the radial width of the region containing mixed fuel and shell materials. The results for Rayleigh-Taylor mixing provided by Youngs' model are considered to be a lower bound for the mix width, while those generated by Haan's model incorporate more experimental characteristics and consequently have larger mix widths. These results are compared with an independent experimental analysis, which infers a larger mix width based on all instabilities and effects captured in the experimental data.

Welser-Sherrill, L.; Mancini, R. C. [Department of Physics, University of Nevada, Reno, Nevada 89557 (United States); Haynes, D. A. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Haan, S. W.; Koch, J. A.; Izumi, N.; Tommasini, R. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Golovkin, I. E.; MacFarlane, J. J. [Prism Computational Sciences, Madison, Wisconsin 53703 (United States); Radha, P. B.; Delettrez, J. A.; Regan, S. P.; Smalyuk, V. A. [Laboratory for Laser Energetics, Rochester, New York 14623 (United States)

2007-07-15T23:59:59.000Z

233

Stability of thin-shell interfaces inside compact stars  

E-Print Network (OSTI)

We use the thin-shell Darmois-Israel formalism to model and assess the stability of the interfaces separating phases, e.g. the core and the crust, within compact stars. We exemplify the relevance and non-triviality of this treatment in the simplest case of an incompressible star, in constant pressure phase transitions, and in the case of strange quark stars with crust.

Jonas P. Pereira; Jaziel G. Coelho; Jorge A. Rueda

2015-01-05T23:59:59.000Z

234

Thin-shell wormholes with a generalized Chaplygin gas  

SciTech Connect

In this article, spherically symmetric thin-shell wormholes supported by a generalized Chaplygin gas are constructed and their stability under perturbations preserving the symmetry is studied. Wormholes with charge and with a cosmological constant are analyzed and the results are compared with those obtained for the original Chaplygin gas, which was considered in a previous work. For some values of the parameters, one stable configuration is also present and a new extra unstable solution is found.

Eiroa, Ernesto F. [Instituto de Astronomia y Fisica del Espacio, Casilla de Correo 67, Sucursal 28, 1428, Buenos Aires, Argentina and Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellon I, 1428, Buenos Aires (Argentina)

2009-08-15T23:59:59.000Z

235

Single-shell tank interim stabilization project plan  

SciTech Connect

Solid and liquid radioactive waste continues to be stored in 149 single-shell tanks at the Hanford Site. To date, 119 tanks have had most of the pumpable liquid removed by interim stabilization. Thirty tanks remain to be stabilized. One of these tanks (C-106) will be stabilized by retrieval of the tank contents. The remaining 29 tanks will be interim stabilized by saltwell pumping. In the summer of 1997, the US Department of Energy (DOE) placed a moratorium on the startup of additional saltwell pumping systems because of funding constraints and proposed modifications to the Hanford Federal Facility Agreement and Consent Order (Tri-Party Agreement) milestones to the Washington State Department of Ecology (Ecology). In a letter dated February 10, 1998, Final Determination Pursuant to Hanford Federal Facility Agreement and Consent Order (Tri-Party Agreement) in the Matter of the Disapproval of the DOE`s Change Control Form M-41-97-01 (Fitzsimmons 1998), Ecology disapproved the DOE Change Control Form M-41-97-01. In response, Fluor Daniel Hanford, Inc. (FDH) directed Lockheed Martin Hanford Corporation (LNMC) to initiate development of a project plan in a letter dated February 25, 1998, Direction for Development of an Aggressive Single-Shell Tank (SST) Interim Stabilization Completion Project Plan in Support of Hanford Federal Facility Agreement and Consent Order (Tri-Party Agreement). In a letter dated March 2, 1998, Request for an Aggressive Single-Shell Tank (SST) Interim Stabilization Completion Project Plan, the DOE reaffirmed the need for an aggressive SST interim stabilization completion project plan to support a finalized Tri-Party Agreement Milestone M-41 recovery plan. This project plan establishes the management framework for conduct of the TWRS Single-Shell Tank Interim Stabilization completion program. Specifically, this plan defines the mission needs and requirements; technical objectives and approach; organizational structure, roles, responsibilities, and interfaces; and operational methods. The plan is based on realistic assumptions and addresses three separate funding scenarios.

Ross, W.E.

1998-03-27T23:59:59.000Z

236

Rotordynamic analysis with shell elements for the transfer matrix method  

E-Print Network (OSTI)

Committee) Al B. elazzo1o (Member) John T. Tielki g (Member) Michael J. Rabins (Head of Department) August 1989 111 ABSTRACT Rotordynamic Analysis with Shell Elements for the Transi'er Matrix Method. (August 1989) Edward Anthony L'Antigua, B. M... theory. There have been recent publications proposing various methods for solving this problem of inaccuracy due to the beam modeling used in the transfer matrix approach. Rouch and Kao (1979), Nelson (1980), To (1981), Greenhill et al. , (1985...

L'Antigua, Edward Anthony

2012-06-07T23:59:59.000Z

237

Mechanics of thick-shell microcapsules made by microfluidics  

Science Journals Connector (OSTI)

Abstract Double emulsion templates made by microfluidics allow for the production of tailored and monodisperse microcapsules. However, their mechanical properties cannot be predicted by traditional analytical models because of their relatively thick shells. In this work, we produce thick-shelled microcapsules with varying sizes and shell thicknesses and mechanically characterize them in single-capsule compression tests using Weibull statistics. We simulate their compression with finite element modeling and find a good agreement with the experimental results under linear elastic conditions, which enables the prediction of elastic properties based on bulk material parameters. Analysis of the simulated stresses show that capsules with a thickness-to-radius ratio above 20% consistently fail at a constant maximum principal stress in accordance with the brittle nature of their bulk material, enabling the extrapolation of their failure loads as well. Combining this structure-property correlation with processing-structure relationships found in previous studies provides a general predictive framework for the assembly of monodisperse microcapsules with tunable mechanics for protection and/or controlled release of encapsulants.

Philipp W. Chen; Jonathan Brignoli; André R. Studart

2014-01-01T23:59:59.000Z

238

82,000-year-old shell beads from North Africa and implications for the origins of modern human behavior  

Science Journals Connector (OSTI)

...North Africa. These marine shells come from archaeological...in South Africa. Wear patterns on the shells...integrated with the wear patterns. Conclusions...of the perforated marine shells from Taforalt...North Africa. These marine shells come from...in South Africa. Wear patterns on...

Abdeljalil Bouzouggar; Nick Barton; Marian Vanhaeren; Francesco d'Errico; Simon Collcutt; Tom Higham; Edward Hodge; Simon Parfitt; Edward Rhodes; Jean-Luc Schwenninger; Chris Stringer; Elaine Turner; Steven Ward; Abdelkrim Moutmir; Abdelhamid Stambouli

2007-01-01T23:59:59.000Z

239

Plasmonic Enhancement of Dye-Sensitized Solar Cells Using Core-Shell-Shell Nanostructures  

E-Print Network (OSTI)

are dependent on efficient harnessing of light for conversion to electricity or chemical fuel, and this has charges into SiO2, which reduces the potential effectiveness of the plasmonic nanoparticle. This issue- particles that does not also provide electrical insulation opens up the metal core to charging effects

240

Retrieval of the Tenth Single-Shell Tank Complete at Hanford: Third  

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

Retrieval of the Tenth Single-Shell Tank Complete at Hanford: Third Retrieval of the Tenth Single-Shell Tank Complete at Hanford: Third Single-Shell Tank Emptied at Hanford's C Farm This Year Retrieval of the Tenth Single-Shell Tank Complete at Hanford: Third Single-Shell Tank Emptied at Hanford's C Farm This Year September 17, 2012 - 12:00pm Addthis Media Contacts Lori Gamache, ORP 509-372-9130 Rob Roxburgh, WRPS 509-376-5188 RICHLAND - Washington River Protection Solutions (WRPS) has advised the U.S. Department of Energy (DOE) that they have completed retrieval of radioactive and chemical waste from the third single-shell tank (SST) this year. WRPS is the tank operations contractor for the DOE Office of River Protection (ORP). An engineering evaluation in the field shows the waste volume in C-109 is below the regulatory requirement of 360 cubic feet of waste remaining in

Note: This page contains sample records for the topic "rebound effect shell" 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

Retrieval of the Tenth Single-Shell Tank Complete at Hanford: Third  

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

the Tenth Single-Shell Tank Complete at Hanford: Third the Tenth Single-Shell Tank Complete at Hanford: Third Single-Shell Tank Emptied at Hanford's C Farm This Year Retrieval of the Tenth Single-Shell Tank Complete at Hanford: Third Single-Shell Tank Emptied at Hanford's C Farm This Year September 17, 2012 - 12:00pm Addthis Media Contacts Lori Gamache, ORP 509-372-9130 Rob Roxburgh, WRPS 509-376-5188 RICHLAND - Washington River Protection Solutions (WRPS) has advised the U.S. Department of Energy (DOE) that they have completed retrieval of radioactive and chemical waste from the third single-shell tank (SST) this year. WRPS is the tank operations contractor for the DOE Office of River Protection (ORP). An engineering evaluation in the field shows the waste volume in C-109 is below the regulatory requirement of 360 cubic feet of waste remaining in

242

Application to Export Electric Energy OE Docket No. EA-338-A Shell Energy  

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

8-A Shell 8-A Shell Energy North America (US), L.P.: Federal Register Notice, Volume 78, No. 45 - March 7, 2013 Application to Export Electric Energy OE Docket No. EA-338-A Shell Energy North America (US), L.P.: Federal Register Notice, Volume 78, No. 45 - March 7, 2013 Application from Shell Energy to export electric energy to Mexico. Federal Register Notice. EA-338-A Shell Energy-MX.pdf More Documents & Publications Application to Export Electric Energy OE Doc No. EA-339-A Shell Energy North America (US), L.P.: Federal Register Notice, Volume 78, No. 45 - March 7, 2013 Application to Export Electric Energy OE Docket No. EA-258-D Brookfield Energy Marketing Inc.: Federal Register Notice, Volume 78. No. 213 - Nov. 4, 2013 Application to Export Electric Energy OE Docket No. EA-336-A ConocoPhillips

243

Working and Net Available Shell Storage Capacity as of March 31, 2011  

Gasoline and Diesel Fuel Update (EIA)

Working and Net Available Shell Storage Capacity Working and Net Available Shell Storage Capacity Working and Net Available Shell Storage Capacity Archives With Data for March 2011 | Release Date: May 31, 2011 Working and Net Available Shell Storage Capacity is the U.S. Energy Information Administration's (EIA) report containing storage capacity data for crude oil, petroleum products, and selected biofuels. The report includes tables detailing working and net available shell storage capacity by type of facility, product, and Petroleum Administration for Defense District (PAD District). Net available shell storage capacity is broken down further to show the percent for exclusive use by facility operators and the percent leased to others. Crude oil storage capacity data are also provided for Cushing, Oklahoma, an important crude oil market center. Data

244

Multielectron inner-shell photoexcitation in absorption spectra of Kr: Theory and experiment  

Science Journals Connector (OSTI)

The probability of Kr 1s photoionization alone and accompanied by 4p, 3d, 3p, 2s, and 2s4p excitations has been calculated as a function of photon energy in the vicinity of the respective thresholds; pertinent energies have been computed including relativistic, quantum-electrodynamic, and relaxation effects. Sharp features from two-electron excitations are expected in absorption spectra only if at least one of the electrons undergoes a transition to a bound state; this becomes less probable in inner shells. An absorption-spectrometry experiment on Kr has been performed with synchrotron radiation; results generally confirm the predictions but also point toward refinements that are required in the theory and the need for improvements in techniques and synchrotron-radiation sources.

Stephen J. Schaphorst; Alojz F. Kodre; Johannes Ruscheinski; Bernd Crasemann; Teijo Åberg; Jukka Tulkki; Mau Hsiung Chen; Yoshiro Azuma; George S. Brown

1993-03-01T23:59:59.000Z

245

Structure of hot rotating {ital s}-{ital d} shell nuclei  

SciTech Connect

Landau theory of phase transitions is used to determine the shape evolution of even-even {ital s}-{ital d} shell nuclei with temperature and spin. Further in this study, the most important statistical thermal shape fluctuations are also incorporated. The constants appearing in the Landau expression for the free energy are determined by using the free energy surfaces at {omega}=0 calculated by the finite temperature Strutinsky and summation methods. The pairing effect is included at ground state but shown to be of minor importance in shape determination. It is seen that the averaged shapes for the above nuclei at different temperatures and spins are mostly triaxial which are quite different from the most probable shapes, prolate or oblate. Only these averaged shapes can be seen through the study of giant dipole resonance decays of highly excited states.

Shanmugam, G. [Department of Physics, Manonmaniam Sundaranar University, Tirunelveli-627 002 (India)] [Department of Physics, Manonmaniam Sundaranar University, Tirunelveli-627 002 (India); Sankar, K. [Department of Physics, Presidency College, Madras-600 005 (India)] [Department of Physics, Presidency College, Madras-600 005 (India); Ramamurthi, K. [Department of Physics, Bharathidasan University, Tiruchirappalli-620 024 (India)] [Department of Physics, Bharathidasan University, Tiruchirappalli-620 024 (India)

1995-09-01T23:59:59.000Z

246

Black GE based on crystalline/amorphous core/shell nanoneedle arrays  

SciTech Connect

Direct growth of black Ge on low-temperature substrates, including plastics and rubber is reported. The material is based on highly dense, crystalline/amorphous core/shell Ge nanoneedle arrays with ultrasharp tips (.about.4 nm) enabled by the Ni catalyzed vapor-solid-solid growth process. Ge nanoneedle arrays exhibit remarkable optical properties. Specifically, minimal optical reflectance (<1%) is observed, even for high angles of incidence (.about.75.degree.) and for relatively short nanoneedle lengths (.about.1 .mu.m). Furthermore, the material exhibits high optical absorption efficiency with an effective band gap of .about.1 eV. The reported black Ge can have important practical implications for efficient photovoltaic and photodetector applications on nonconventional substrates.

Javey, Ali; Chueh, Yu-Lun; Fan, Zhiyong

2014-03-04T23:59:59.000Z

247

Shell-model picture of virtual detour transitions in Ca41 radiative electron-capture decay  

Science Journals Connector (OSTI)

For the first forbidden unique (1u) radiative electron-capture ? decay of Ca41, a contribution of the ?/? detour transitions via virtual nuclear states to the bremsstrahlung spectrum has been considered in terms of the shell model. Calculations of the matrix elements for the virtual E1 ? and allowed Gamow-Teller ? transitions have been performed with the use of the Warburton, Becker, Millener, and Brown interactions. For the effective charge, which describes the contribution of the detour transitions, an interval 0.96

J. L. ?ylicz; M. Pfützner; S. G. Rohozi?ski; B. A. Brown

1996-04-01T23:59:59.000Z

248

Investigating the static dipole polarisability of noble gas atoms confined in impenetrable spheres and shells  

E-Print Network (OSTI)

The static dipole polarisability of noble gas atoms confined by impenetrable spheres and spherical shells is studied using the B-spline random phase with exchange approximation. The general trend in dipole polarisabilities across the noble gas sequence shows a decrease in the dipole polarisability as the volume of the confining impenetrable sphere is reduced and a large increase in the dipole polarisability for confinement by impenetrable spherical shells as the inner shell radius is increased.

Ludlow, J A

2015-01-01T23:59:59.000Z

249

High Temperature Capabililty and Innovative Cooling with a Spar and Shell Turbine Blade - Florida Turbine Technologies  

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

Temperature Capability and Temperature Capability and Innovative Cooling with a Spar and Shell Turbine Blade-Florida Turbine Technologies Background Florida Turbine Technologies, Inc. (FTT) is currently developing advanced aerothermal technologies centered on spar and shell airfoil concepts meant to provide highly durable turbine components that require the lowest cooling flow possible. The spar-shell system represents a unique opportunity for the use of advanced, high-temperature materials

250

Mixer pump test plan for double shell tank AZ-101  

SciTech Connect

Westinghouse Hanford Company has undertaken the task to develop and demonstrate a method of retrieval for double-shell tank (DST)waste. Mixer pumps were chosen as the planned method of retrieval for the DSTs, based on engineering technology studies,past experience with hydraulic sluicing at the Hanford Site, and experience with mixer pumps at the Westinghouse Savannah River Site. This document outlines a test plan to demonstrate the ability of two 300 hp mixer pumps installed in the AZ-101 tank to mobilize waste.

Symons, G.A.; Staehr, T.W., Westinghouse Hanford

1996-06-01T23:59:59.000Z

251

Structural Determination of the Hydrophobic Hydration Shell of Kr  

Science Journals Connector (OSTI)

We report the first direct measurement by extended x-ray absorption fine structure spectroscopy of the hydrophobic hydration shell of the noble gas krypton. Measurements were made in aqueous solution at gas pressures in the range 20 to 100 bars and at a temperature of 320 K. Data of excellent quality were collected taking advantage of the high brilliance of a third generation synchrotron radiation source. An advanced data analysis procedure has been applied to determine the Kr-O partial radial distribution function in the short range.

Adriano Filipponi; Daniel T. Bowron; Colin Lobban; John L. Finney

1997-08-18T23:59:59.000Z

252

Monte Carlo methods for the nuclear shell model  

E-Print Network (OSTI)

We present novel Monte Carlo methods for treating the interacting shell model that allow exact calculations much larger than those heretofore possible. The two-body interaction is linearized by an auxiliary field; Monte Carlo evaluation of the resulting functional integral gives ground-state or thermal expectation values of few-body operators. The ``sign problem'' generic to quantum Monte Carlo calculations is absent in a number of cases. We discuss the favorable scaling of these methods with nucleon numb er and basis size and their suitability to parallel computation.

C. W. Johnson; S. E. Koonin; G. H. Lang; W. E. Ormand

1992-10-20T23:59:59.000Z

253

On Hilbert after slide 4 1 echo $SHELL  

E-Print Network (OSTI)

On Hilbert after slide 4 1 echo $SHELL 2 ls ­la /bin/*sh* 3 clear 4 ls 5 cat get 6 ls ­la get after slide 5 1 cat Rb 2 cat rnorm.R 3 ./R 4 ls ­la Rb 5 chmod +x Rb 6 cat Rb 7 man ls 8 ls ­c *.out 9 ls ­lc *.out 10 man head 11 ./Rb rnorm.R 12 clear On Hilbert after slide 7 1 cat res 2 man

Dahl, David B.

254

E-Print Network 3.0 - asymmetric dust shell Sample Search Results  

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

blue-shifted emission lines, because the dust obscures more emission from receding gas; and (iii... is much faster than that expected for a typical circumstellar dust shell...

255

E-Print Network 3.0 - adaptive shell color Sample Search Results  

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

Contribution of parasites to intra- and inter-site variation in shell ... Source: Poulin, Robert - Department of Zoology, University of Otago Collection: Biology and Medicine...

256

Intern experience at Shell Western E&P, Inc.: an internship report  

E-Print Network (OSTI)

E&P Inc., a subsidiary of Shell Oil Company, at Houston, Texas, during the period January 21, 1986 through January 21, 1987. It is intended to establish that this experience meets the objectives of the Doctor of Engineering internship. Working..., the author has served his internship at the Houston, Texas office of Shell Western E&P Inc., within the Western Production Division. Shell Western E&P Inc. is a subsidiary of Shell Oil Company. The latter is one of the several operating companies...

Obioha, Obioha Mackena, 1959-

2013-03-13T23:59:59.000Z

257

Welding Hot Cracking of Side Shell of Drilling-Well Oil Storage Ship  

Science Journals Connector (OSTI)

...Cracks were found in the weld metal (WM) of weld-section of side shell of drilling-well oil storage ship when performing post weld radiographic...

Zhi-wei Yu; Xiao-lei Xu

2014-11-01T23:59:59.000Z

258

Off-shell T matrices for a class of separable nonlocal potentials  

Science Journals Connector (OSTI)

In an earlier paper we considered scattering of all partial waves from a wide class of separable nonlocal potentials, and obtained in configuration space exact analytic solutions for the wave functions and phase shifts. In this paper these solutions are used to construct exact expressions for the half-off-shell and off-shell T matrices for this class of potentials. As an illustration, we compare the off-shell T matrix for the one-term Yamaguchi potential calculated by the method presented here with the expression obtained by standard techniques.NUCLEAR REACTIONS Off-shell T matrices. Separable nonlocal potentials.

B. Bagchi and B. Mulligan

1974-12-01T23:59:59.000Z

259

E-Print Network 3.0 - auter- shell vacancy Sample Search Results  

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

Res. Soc. Symp. Proc. 527, 210 (1998). Summary: interaction signals due to transition-metal vacancies in the first atomic shells of the probes. Possible... quadrupole...

260

Bathymetric records of marine shelled mollusca from the northeastern shelf of Yucatan, Mexico  

E-Print Network (OSTI)

and rounded, slit anteriorly and notched toward the posterior and the apex. The margin is very crenulated. Rice and Kornicker 51 (1965) reported two shells off the Campeche Bank in 30 fms. Puncturella noachina (Linne, 1771) Two shells, 3 mm in diameter... cancellate sculpture. The interior is glossy with a pit posterior to the slit. The shells agree with the description as interpreted by Abbott (1954). Rimula frenulata Dell, 1889 Q'late 1, Figure a) One shell, 5 mm long x 3 mm wide, was found at 23...

Treece, Granvil D

1977-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" 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

HANFORD DOUBLE SHELL TANK THERMAL AND SEISMIC PROJECT SENSITIVITY OF DOUBLE SHELL DYNAMIC RESPONSE TO THE WASTE ELASTIC PROPERTIES  

SciTech Connect

The purpose of this study was to determine the sensitivity of the dynamic response of the Hanford double-shell tanks (DSTs) to the assumptions regarding the constitutive properties of the contained waste. In all cases, the waste was modeled as a uniform linearly elastic material. The focus of the study was on the changes in the modal response of the tank and waste system as the extensional modulus (elastic modulus in tension and compression) and shear modulus of the waste were varied through six orders of magnitude. Time-history analyses were also performed for selected cases and peak horizontal reaction forces and axial stresses at the bottom of the primary tank were evaluated. Because the analysis focused on the differences in the responses between solid-filled and liquid-filled tanks, it is a comparative analysis rather than an analysis of record for a specific tank or set of tanks. The shear modulus was varied between 4 x 10{sup 3} Pa and 4.135 x 10{sup 9} Pa. The lowest value of shear modulus was sufficient to simulate the modal response of a liquid-containing tank, while the higher values are several orders of magnitude greater than the upper limit of expected properties for tank contents. The range of elastic properties used was sufficient to show liquid-like response at the lower values, followed by a transition range of semi-solid-like response to a clearly identifiable solid-like response. It was assumed that the mechanical properties of the tank contents were spatially uniform. Because sludge-like materials are expected only to exist in the lower part of the tanks, this assumption leads to an exaggeration of the effects of sludge-like materials in the tanks. The results of the study show that up to a waste shear modulus of at least 40,000 Pa, the modal properties of the tank and waste system are very nearly the same as for the equivalent liquid-containing tank. This suggests that the differences in critical tank responses between liquid-containing tanks and tanks containing sludge-like materials having a shear modulus not exceeding 40,000 Pa are unlikely to be greater than those due to the uncertainties involved in the definition of the design ground motion or in the properties of the tank-waste system. This is the fundamental conclusion of the study. The study also shows that increasing the waste extensional modulus and shear modulus does not lead to increased mass participation at the impulsive frequency of the liquid-containing system. Instead, increasing the waste stiffness eventually leads to fundamental changes in the modal properties including an increase in the fundamental system frequency.

MACKEY TC; ABATT FG; JOHNSON KI

2009-01-16T23:59:59.000Z

262

Chaotic vibration of a liquid-filled thin cylindrical shell  

SciTech Connect

Recently, a large number of thin walled cylindrical tanks have been widely used, such as oil-storage tanks, and LMFBR primary components. To assess the safety of these systems against earthquakes, it is of great technical importance to clarify the fluid-coupled vibration characteristics of the systems subjected to certain kinds of dynamic loads. This paper describes an experimental study on the chaos of a partially liquid-filled cylindrical tank under horizontal excitation. The test cylinder with a mean radius of 170 mm was made of polyester film with a nominal thickness of 0.188 mm which was lap-joined along a longitudinal seam and bonded with an aluminum end plate along one edge. Shaking table tests were conducted in order to investigate the dynamic characteristics of the shell response. Several types of limit cycles were observed at lower accelerations, and the instability phenomenon, which jumped at some excitation frequencies, occurred for acceleration amplitudes above a critical value. Finally, at higher excitation accelerations, the shell responses became chaotic. The occurrence of the chaos was recognized by the time history, Poincare map, phase trajectory, power spectrum and a positive Lyapunov exponent calculated from the orbits in the three dimensional phase space. In order to visualize the strange attractor, phase portraits were constructed by embedding the trajectories in the phase space.

Toyoda, Y.; Masuko, Y. [Central Research Inst. of Electric Power Industry, Abiko, Chiba (Japan). Abiko Research Lab.

1996-12-01T23:59:59.000Z

263

Alpha particle cluster states in fp-shell nuclei  

Science Journals Connector (OSTI)

Alpha particle cluster structure is known experimentally to persist throughout the mass range 16?A?20, and has been very successfully described in this region in terms of the Buck-Dover-Vary local potential cluster model. It is argued that an analogous cluster structure should be present in nuclei at the beginning of the fp shell, and the available experimental data are examined to determine likely alpha particle cluster state candidates in the mass range 40?A?44. Calculations of the cluster state spectra and mean square cluster-core separation distances (which may be readily used to evaluate E2 electromagnetic transition rates) for Ca40, Ca42, Sc42, Sc43, Ti43, and Ti44 using the above-mentioned model are presented, and compared with experimental measurements where possible. The agreement between theory and experiment is generally good (although inferior to that obtained in the sd shell), and points to the desirability of an extension and improvement of the measurements of the properties of the excited states in these nuclei.

A. C. Merchant

1987-08-01T23:59:59.000Z

264

? decay in the complex-energy shell model  

Science Journals Connector (OSTI)

Background: Alpha emission from a nucleus is a fundamental decay process in which the alpha particle formed inside the nucleus tunnels out through the potential barrier.Purpose: We describe alpha decay of 212Po and 104Te by means of the configuration interaction approach.Method: To compute the preformation factor and penetrability, we use the complex-energy shell model with a separable T=1 interaction. The single-particle space is expanded in a Woods-Saxon basis that consists of bound and unbound resonant states. Special attention is paid to the treatment of the norm kernel appearing in the definition of the formation amplitude that guarantees the normalization of the channel function.Results: Without explicitly considering the alpha-cluster component in the wave function of the parent nucleus, we reproduce the experimental alpha-decay width of 212Po and predict an upper limit of T1/2=5.5×10?7 sec for the half-life of 104Te.Conclusions: The complex-energy shell model in a large valence configuration space is capable of providing a microscopic description of the alpha decay of heavy nuclei having two valence protons and two valence neutrons outside the doubly magic core. The inclusion of proton-neutron interaction between the valence nucleons is likely to shorten the predicted half-live of 104Te.

R. Id Betan and W. Nazarewicz

2012-09-27T23:59:59.000Z

265

Rejuvenating the shells of supernova remnants by pulsar winds  

E-Print Network (OSTI)

We reconsider the rejuvenation mechanism as proposed by Shull, Fesen, & Saken (1989). These authors suggest that an active pulsar can catch up with, and rejuvenate the shell of the associated supernova remnant. The morphology of the SNRs G5.4-1.2 and CTB80 seem to confirm this rejuvenation mechanism. The spindown energy is deposited by the pulsar as a relativistic pulsar wind, and has a sufficient power to explain the observed radio emission observed in these remnants. Shull et al. (1989) did {\\it not} explain the observed lengthscales of the rejuvenated parts of the SNR shell. therefore one needs to consider the diffusive transport of the injected electrons by the pulsar wind. We propose to apply a diffusion mechanism as introduced by Jokipii (1987), which makes a distinction between diffusion along the magnetic field lines and perpendicular to the magnetic field lines, parameterised by the gyro factor $\\eta$. We show that one has to assume a high value for the gyro factor, $\\eta\\simeq 10^3-10^4$, i.e. diffusion of the electrons along the magnetic field line is much faster then perpendicular to the magnetic field line, in order for the rejuvenation mechanism to work on the observed lengthscales.

Eric van der Swaluw; Abraham Achterberg; Yves A. Gallant

2001-12-17T23:59:59.000Z

266

Slow expansion of the shell of the recurrent nova T Pyxidis and detection of a faint extended envelope  

SciTech Connect

New H-alpha narrow-based CCD imaging of the recurrent nova T Pyxidis and the detection of a very faint, extended H-alpha halo surrounding the already known shell are reported. A forbidden O III image containing an emitting shell with a morphology different from that of the H-alpha shell is presented, and measurements of the H-alpha shell expansion are reported which rule out the 1966 eruption date for the shell origin, assuming uniform expansion. It is proposed that the observed shell consists of slowly moving, solar abundance ejecta which are photoionized. 18 references.

Shara, M.M.; Moffat, A.F.J.; Williams, R.E.; Cohen, J.G.

1989-02-01T23:59:59.000Z

267

HYSTERESIS IN A ROTATING DIFFERENTIALLY HEATED SPHERICAL SHELL OF BOUSSINESQ FLUID  

E-Print Network (OSTI)

HYSTERESIS IN A ROTATING DIFFERENTIALLY HEATED SPHERICAL SHELL OF BOUSSINESQ FLUID GREGORY M. LEWIS AND WILLIAM F. LANGFORD Abstract. A mathematical model of convection of a Boussinesq fluid, flow transitions, Boussinesq fluid, flow in a rotating spherical shell, numerical computation, large

Lewis, Greg

268

Static, free and forced vibration analysis of arbitrary non-uniform shells with tapered stiffeners  

Science Journals Connector (OSTI)

The behaviour of the stiffened plates and shells having varying thicknesses both in the skin, as well as in the stiffening members, has been investigated under various static and dynamic loading conditions by employing a new higher order arbitrarily stiffened triangular shallow shell finite element which includes thickness variations. The shell element can accommodate arbitrary disposition of any number of stiffeners, which in turn allows the irregular mesh generation scheme independent on the alignment of the stiffness in the stiffened shell structures. The quadratic variation of thickness both in the shell elemenl and the stiffeners have been considered. Before carrying out the investigation on the dynamic response analysis in the time domain, the undamped free vibration of the same to compute the natural time period of oscillation has also been performed. A number of problems of bare plates and shells of varying thickness have been analyzed and the comparison of the numerical results with the available theoretical and/or experimental results shows close agreement, even with the coarse finite element mesh scheme. The convergence test with element gridwork refinement for each analysis has also been carried out to show the monotonic and exceedingly rapid convergence. The new results for the above analyses of the stiffened plates and shells, where the thickness is varying for both the plate/shell and the stiffeners have also been presented, which will be valuable for future researchers in this field.

G. Sinha; M. Mukhopadhyay

1997-01-01T23:59:59.000Z

269

Triple-picket warm plastic-shell implosions on OMEGA P. B. Radha,1  

E-Print Network (OSTI)

Triple-picket warm plastic-shell implosions on OMEGA P. B. Radha,1 C. Stoeckl,1 V. N. Goncharov,1 J-gas-filled plastic shells are imploded by direct irradiation from the OMEGA laser T. R. Boehly et al., Opt. Commun

270

Symbolic use of marine shells and mineral pigments by Iberian Neandertals  

Science Journals Connector (OSTI)

...perforation-associated use wear evidence. Shallow notches...prevent assessment of use wear. The “origin of perforation...that naturally perforated marine shells were extensively...behavior can explain inland marine shell accumulations...However, neither use wear nor any kind...

João Zilhão; Diego E. Angelucci; Ernestina Badal-García; Francesco d’Errico; Floréal Daniel; Laure Dayet; Katerina Douka; Thomas F. G. Higham; María José Martínez-Sánchez; Ricardo Montes-Bernárdez; Sonia Murcia-Mascarós; Carmen Pérez-Sirvent; Clodoaldo Roldán-García; Marian Vanhaeren; Valentín Villaverde; Rachel Wood; Josefina Zapata

2010-01-01T23:59:59.000Z

271

AT Cnc: A Second Dwarf Nova with a Classical Nova Shell  

Science Journals Connector (OSTI)

We are systematically surveying all known and suspected Z Cam-type dwarf novae for classical nova shells. This survey is motivated by the discovery of the largest known classical nova shell, which surrounds the archetypal dwarf nova Z Camelopardalis. The Z Cam shell demonstrates that at least some dwarf novae must have undergone classical nova eruptions in the past, and that at least some classical novae become dwarf novae long after their nova thermonuclear outbursts, in accord with the hibernation scenario of cataclysmic binaries. Here we report the detection of a fragmented "shell," 3 arcmin in diameter, surrounding the dwarf nova AT Cancri. This second discovery demonstrates that nova shells surrounding Z Cam-type dwarf novae cannot be very rare. The shell geometry is suggestive of bipolar, conical ejection seen nearly pole-on. A spectrum of the brightest AT Cnc shell knot is similar to that of the ejecta of the classical nova GK Per, and of Z Cam, dominated by [N II] emission. Galaxy Evolution Explorer FUV imagery reveals a similar-sized, FUV-emitting shell. We determine a distance of 460 pc to AT Cnc, and an upper limit to its ejecta mass of ~5 ? 10–5 M ?, typical of classical novae.

Michael M. Shara; Trisha Mizusawa; Peter Wehinger; David Zurek; Christopher D. Martin; James D. Neill; Karl Forster; Mark Seibert

2012-01-01T23:59:59.000Z

272

On a tensor-based finite element model for the analysis of shell structures  

E-Print Network (OSTI)

In the present study, we propose a computational model for the linear and nonlinear analysis of shell structures. We consider a tensor-based finite element formulation which describes the mathematical shell model in a natural and simple way by using...

Arciniega Aleman, Roman Augusto

2006-04-12T23:59:59.000Z

273

Unique Solutions to Hartree-Fock Equations for Closed Shell Atoms  

E-Print Network (OSTI)

Unique Solutions to Hartree-Fock Equations for Closed Shell Atoms Marcel Griesemer and Fabian study the problem of uniqueness of solutions to the Hartree and Hartree-Fock equations of atoms. We show, for example, that the Hartree- Fock ground state of a closed shell atom is unique provided the atomic number Z

274

Self-assembly of polyhedral shells: A molecular dynamics study D. C. Rapaport*  

E-Print Network (OSTI)

Self-assembly of polyhedral shells: A molecular dynamics study D. C. Rapaport* Physics Department) The use of reduced models for investigating the self-assembly dynamics underlying protein shell formation in spherical viruses is described. The spontaneous self-assembly of these polyhedral, supramolecular structures

Rapaport, Dennis C.

275

Aqueous synthesis and characterization of CdSe/ZnO core-shell nanoparticles  

Science Journals Connector (OSTI)

Core-shell nanomaterials based on CdSe as the core and ZnO as the shell were prepared using an aqueous route involving the use of Cd salt and NaBH4 in reaction with Se to generate CdSe in the presence of thioglycerol (TG) as a stabilizer. ...

B. P. Rakgalakane; M. J. Moloto

2011-01-01T23:59:59.000Z

276

Collective enhancement of nuclear state densities by the shell model Monte Carlo approach  

E-Print Network (OSTI)

The shell model Monte Carlo (SMMC) approach allows for the microscopic calculation of statistical and collective properties of heavy nuclei using the framework of the configuration-interaction shell model in very large model spaces. We present recent applications of the SMMC method to the calculation of state densities and their collective enhancement factors in rare-earth nuclei.

Özen, C; Nakada, H

2015-01-01T23:59:59.000Z

277

Core-Protected Platinum Monolayer Shell High-Stability Electrocatalysts for Fuel-Cell Cathodes  

SciTech Connect

Platinum monolayers can act as shells for palladium nanoparticles to lead to electrocatalysts with high activities and an ultralow platinum content, but high platinum utilization. The stability derives from the core protecting the shell from dissolution. In fuel-cell tests, no loss of platinum was observed in 200,000 potential cycles, whereas loss of palladium was significant.

K Sasaki; H Naohara; Y Cai; Y Choi; P Liu; M Vukmirovic; J Wang; R Adzic

2011-12-31T23:59:59.000Z

278

Tuning the defect configurations in nematic and smectic liquid crystalline shells  

Science Journals Connector (OSTI)

...arrangements in smectic liquid crystal shells utilizing the...Nematic-smectic transition in spherical shells. Phys. Rev...Topological defects in spherical nematics. Phys. Rev...a smectic-a from a bent nematic phase and smectic...The physics of liquid crystals. Oxford, UK: Clarendon...

2013-01-01T23:59:59.000Z

279

MECHANICAL PROPERTIES OF THIN GDP SHELLS USED AS CRYOGENIC DIRECT DRIVE TARGETS AT OMEGA  

SciTech Connect

OAK-B135 Thin glow discharge polymer (GDP) shells are currently used as the targets for cryogenic direct drive laser fusion experiments. These shells need to be filled with nearly 1000 atm of D{sub 2} and cooled to cryogenic temperatures without failing due to buckling and bursting pressures they experience in this process. Therefore, the mechanical and permeation properties of these shells are of utmost importance in successful and rapid filling with D{sub 2}. In this paper, they present an overview of buckle and burst pressures of several different types of GDP shells. These include those made using traditional GDP deposition parameters (standard GDP) using a high deposition pressure and using modified parameters (strong GDP) of low deposition pressure that leads to more robust shells.

NIKROO,A; CZECHOWICZ,D; CHEN,K.C; DICKEN,M; MORRIS,C; ANDREWS,R; GREENWOOD,A.L; CASTILLO,E

2003-06-01T23:59:59.000Z

280

GaN-nanowire/amorphous-Si core-shell heterojunction diodes  

Science Journals Connector (OSTI)

We report the electrical characterization of gallium-nitride/amorphous-silicon ( n -type nanowire/ p -type shell) diodesfabricated by postgrowth silicon shell formation technique. The n -type (unintentionally doped) gallium-nitride (GaN)nanowires were aligned on prepatterned sapphire substrates using dielectrophoresis. The amorphous silicon ( a -Si ) shell was deposited using plasma enhanced chemical vapor deposition technique and doped using spin-on boron dopant. Using photolithography plasma etching and metal deposition complete p - n ( p -type a -Si shell on n -type GaNnanowire)heterojunctiondiodes were developed. These diodes had reliable electrical characteristics with 1 V forward turn-on voltage. These nanowire core-shell heterojunctiondiodes exhibited negative differential resistance which can be explained by phonon-assisted interband tunneling mechanism.

Abhishek Motayed; Albert V. Davydov

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" from the National Library of EnergyBeta (NLEBeta).
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281

Radial Structure of Shell Modulations Near Peak Compression of Spherical Implosions  

SciTech Connect

The structure of shell modulations is measured at peak compression of directly driven spherical implosions using absorption of titanium-doped layers placed at various distances of 1, 5, 7, and 9 mm from the inner surface of 20-mm-thick plastic CH shells filled with 18 atm of D3He gas. The modulations are measured using the ratios of monochromatic core images taken inside and outside of the titanium 1s-2p absorption spectral region. Peak-compression, time-integrated areal-density modulations are higher at the inner shell surface, which is unstable during the deceleration phase of an implosion with a modulation level of 59{+-}14%, The perturbations are lower in the central part of the shell, having a modulation level of 18{+-}5%. The outer surface of the shell, which is unstable during the acceleration phase of an implosion, has a modulation level of 52{+-}20%.

Smalyuk, V.A.; Dumanis, S.B.; Marshall, F.J.; Delettrez, J.A.; Meyerhofer, D.D.; Regan, S.P.; Sangster, T.C.; Yaakobi, B.; Koch, J.A.

2003-03-11T23:59:59.000Z

282

First Observations of Nonhydrodynamic Mix at the Fuel-Shell Interface in Shock-Driven Inertial Confinement Implosions  

E-Print Network (OSTI)

A strong nonhydrodynamic mechanism generating atomic fuel-shell mix has been observed in strongly shocked inertial confinement fusion implosions of thin deuterated-plastic shells filled with [superscript 3]He gas. These ...

Amendt, P.

283

Shell-Model Analysis for Brueckner Calculations in Light Nuclei  

Science Journals Connector (OSTI)

Brueckner self-consistent calculations are performed for O16, H3, and He4 nuclei with various modern hard-core interactions. Elements of the G matrix are calculated by the reference-spectrum method, while Q-1 corrections are made by matrix inversion in the proper single-particle space. Thus, it is not assumed that Q commutes with the center-of-mass motion. The prescription for selecting the appropriate spectrum of single-particle excited states is investigated by comparing results of the Brueckner method with other calculations. These comparisons indicate that the particle spectrum should be left unperturbed. One then finds that the Hamada-Johnston, Yale, and Reid (hard-core) interactions yield about one half the binding energy of O16. The calculated results are dissected into shell-model components. This analysis indicates that the short-range part of the hard-core interaction is too strongly repulsive.

Ram K. Tripathi and Paul Goldhammer

1972-07-01T23:59:59.000Z

284

Inner-Shell Vacancy Production in Ion-Atom Collisions  

Science Journals Connector (OSTI)

Theoretical and experimental work relevant to the creation of atomic inner-shell vacancies in collisions of ions and atoms is reviewed. The experimental data on total excitation cross sections and electron and x-ray emission spectra are discussed in some detail. Energy loss data from inelastic scattering experiments involving heavy ions are also reviewed. An attempt is made to relate the different kinds of data to one another and to the available theoretical models. Excitation by the light ions (protons, alpha particles) has been well described theoretically in terms of perturbation by an incident point charge. However, no comprehensive model yet exists for the case of incident heavier ions, although the heavy-ion data for low collision velocities support an interpretation based on the formation of a transient quasimolecule. The literature has been reviewed to about April 1972.

J. D. GARCIA, R. J. FORTNER, and T. M. KAVANAGH

1973-04-01T23:59:59.000Z

285

Development of simulation tools for virus shell assembly. Final report  

SciTech Connect

Prof. Berger's major areas of research have been in applying computational and mathematical techniques to problems in biology, and more specifically to problems in protein folding and genomics. Significant progress has been made in the following areas relating to virus shell assembly: development has been progressing on a second-generation self-assembly simulator which provides a more versatile and physically realistic model of assembly; simulations are being developed and applied to a variety of problems in virus assembly; and collaborative efforts have continued with experimental biologists to verify and inspire the local rules theory and the simulator. The group has also worked on applications of the techniques developed here to other self-assembling structures in the material and biological sciences. Some of this work has been conducted in conjunction with Dr. Sorin Istrail when he was at Sandia National Labs.

Berger, Bonnie

2001-01-05T23:59:59.000Z

286

A stabilized 3-D co-rotational formulation for geometrically nonlinear analysis of multi-layered composite shells*  

E-Print Network (OSTI)

-layered composite shells* A. Masud, C. L. Tham, W. K. Liu Abstract This paper presents a continuum-based shear- deformable ®nite element formulation for geometrically nonlinear analysis of thick layered composite shells to highlight the ef®ciency of the method for application to composite shell analysis. Numerical examples

Masud, Arif

287

AT Cnc: A Second Dwarf Nova with a Classical Nova Shell  

E-Print Network (OSTI)

We are systematically surveying all known and suspected Z Cam-type dwarf novae for classical nova shells. This survey is motivated by the discovery of the largest known classical nova shell, which surrounds the archetypal dwarf nova Z Camelopardalis. The Z Cam shell demonstrates that at least some dwarf novae must have undergone classical nova eruptions in the past, and that at least some classical novae become dwarf novae long after their nova thermonuclear outbursts, in accord with the hibernation scenario of cataclysmic binaries. Here we report the detection of a fragmented "shell", 3 arcmin in diameter, surrounding the dwarf nova AT Cancri. This second discovery demonstrates that nova shells surrounding Z Cam-type dwarf novae cannot be very rare. The shell geometry is suggestive of bipolar, conical ejection seen nearly pole-on. A spectrum of the brightest AT Cnc shell knot is similar to that of the ejecta of the classical nova GK Per, and of Z Cam, dominated by [NII] emission. Galex FUV imagery reveals a ...

Shara, Michael M; Wehinger, Peter; Zurek, David; Martin, Christopher D; Neill, James D; Forster, Karl; Seibert, Mark

2012-01-01T23:59:59.000Z

288

DETECTING THE RAPIDLY EXPANDING OUTER SHELL OF THE CRAB NEBULA: WHERE TO LOOK  

SciTech Connect

We present a range of steady-state photoionization simulations, corresponding to different assumed shell geometries and compositions, of the unseen postulated rapidly expanding outer shell to the Crab Nebula. The properties of the shell are constrained by the mass that must lie within it, and by limits to the intensities of hydrogen recombination lines. In all cases the photoionization models predict very strong emissions from high ionization lines that will not be emitted by the Crab's filaments, alleviating problems with detecting these lines in the presence of light scattered from brighter parts of the Crab. The near-NIR [Ne VI] {lambda}7.652 {mu}m line is a particularly good case; it should be dramatically brighter than the optical lines commonly used in searches. The C IV {lambda}1549 doublet is predicted to be the strongest absorption line from the shell, which is in agreement with Hubble Space Telescope observations. We show that the cooling timescale for the outer shell is much longer than the age of the Crab, due to the low density. This means that the temperature of the shell will actually ''remember'' its initial conditions. However, the recombination time is much shorter than the age of the Crab, so the predicted level of ionization should approximate the real ionization. In any case, it is clear that IR observations present the best opportunity to detect the outer shell and so guide future models that will constrain early events in the original explosion.

Wang Xiang; Ferland, G. J. [Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506 (United States); Baldwin, J. A.; Loh, E. D.; Richardson, C. T., E-mail: xiang.wang@uky.edu [Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824-2320 (United States)

2013-09-10T23:59:59.000Z

289

H I SHELLS AND SUPERSHELLS IN THE I-GALFA H I 21 cm LINE SURVEY. I. FAST-EXPANDING H I SHELLS ASSOCIATED WITH SUPERNOVA REMNANTS  

SciTech Connect

We search for fast-expanding H I shells associated with Galactic supernova remnants (SNRs) in the longitude range l ? 32° to 77° using 21 cm line data from the Inner-Galaxy Arecibo L-band Feed Array (I-GALFA) H I survey. Among the 39 known Galactic SNRs in this region, we find such H I shells in 4 SNRs: W44, G54.4-0.3, W51C, and CTB 80. All four were previously identified in low-resolution surveys, and three of those (excluding G54.4-0.3) were previously studied with the Arecibo telescope. A remarkable new result, however, is the detection of H I emission at both very high positive and negative velocities in W44 from the receding and approaching parts of the H I expanding shell, respectively. This is the first detection of both sides of an expanding shell associated with an SNR in H I 21 cm emission. The high-resolution I-GALFA survey data also reveal a prominent expanding H I shell with high circular symmetry associated with G54.4-0.3. We explore the physical characteristics of four SNRs and discuss what differentiates them from other SNRs in the survey area. We conclude that these four SNRs are likely the remnants of core-collapse supernovae interacting with a relatively dense (?> 1 cm{sup –3}) ambient medium, and we discuss the visibility of SNRs in the H I 21 cm line.

Park, G.; Koo, B.-C. [Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742 (Korea, Republic of); Gibson, S. J.; Newton, J. H. [Department of Physics and Astronomy, Western Kentucky University, Bowling Green, KY 42101 (United States); Kang, J.-H.; Lane, D. C.; Douglas, K. A. [Arecibo Observatory, HC 3 Box 53995, Arecibo, PR 00612 (United States); Peek, J. E. G. [Department of Astronomy, Columbia University, New York, NY 10027 (United States); Korpela, E. J. [Space Sciences Laboratory, University of California, Berkeley, CA 94720 (United States); Heiles, C., E-mail: koo@astro.snu.ac.kr [Radio Astronomy Lab, UC Berkeley, 601 Campbell Hall, Berkeley, CA 94720 (United States)

2013-11-01T23:59:59.000Z

290

,"U.S. Total Shell Storage Capacity at Operable Refineries"  

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

Shell Storage Capacity at Operable Refineries" Shell Storage Capacity at Operable Refineries" ,"Click worksheet name or tab at bottom for data" ,"Worksheet Name","Description","# Of Series","Frequency","Latest Data for" ,"Data 1","U.S. Total Shell Storage Capacity at Operable Refineries",28,"Annual",2013,"6/30/1982" ,"Release Date:","6/21/2013" ,"Next Release Date:","6/20/2014" ,"Excel File Name:","pet_pnp_capshell_dcu_nus_a.xls" ,"Available from Web Page:","http://www.eia.gov/dnav/pet/pet_pnp_capshell_dcu_nus_a.htm" ,"Source:","Energy Information Administration" ,"For Help, Contact:","infoctr@eia.gov"

291

Robustness of the filamentation instability for asymmetric plasma shells collision in arbitrarily oriented magnetic field  

SciTech Connect

The filamentation instability triggered when two counter streaming plasma shells overlap appears to be the main mechanism by which collisionless shocks are generated. It has been known for long that a flow aligned magnetic field can completely suppress this instability. In a recent paper [Phys. Plasmas 18, 080706 (2011)], it was demonstrated in two dimensions that for the case of two cold, symmetric, relativistically colliding shells, such cancellation cannot occur if the field is not perfectly aligned. Here, this result is extended to the case of two asymmetric shells. The filamentation instability appears therefore as an increasingly robust mechanism to generate shocks.

Bret, A. [ETSI Industriales, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain and Instituto de Investigaciones Energticas y Aplicaciones Industriales, Campus Universitario de Ciudad Real, 13071 Ciudad Real (Spain)] [ETSI Industriales, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain and Instituto de Investigaciones Energticas y Aplicaciones Industriales, Campus Universitario de Ciudad Real, 13071 Ciudad Real (Spain)

2013-10-15T23:59:59.000Z

292

Review of high convergence implosion experiments with single and double shell targets  

SciTech Connect

Experiments have been been performed in recent years at the Omega laser studying double shell capsules as an a1 teinative, 11011 cryogenic, path towards ignition at NTF. Double shell capsules designed to mitigate the Au M-band radiation asymmetries, were experimentally found to perform well in both spherical and cylindrical hohlraums, achieving near 1-D (-90 %) clean calculated yield at convergence comparable to that required for NIF ignition. Near-term plans include directly driven double shell experiments at Omega, which eliminates Au M-band radiation as a yield degradation m ec h an i s in.

Delamater, N. D. (Norman D.); Watt, R. G. (Robert G.); Varnum, W. S. (William S.)

2002-01-01T23:59:59.000Z

293

Shape evolution of a core-shell spherical particle under hydrostatic pressure  

Science Journals Connector (OSTI)

The morphological evolution by surface diffusion of a core-shell spherical particle has been investigated theoretically under hydrostatic pressure when the shear modulii of the core and shell are different. A linear stability analysis has demonstrated that depending on the pressure, shear modulii, and radii of both phases, the free surface of the composite particle may be unstable with respect to a shape perturbation. A stability diagram finally emphasizes that the roughness development is favored in the case of a hard shell with a soft core.

Jérôme Colin

2012-03-30T23:59:59.000Z

294

CONSISTENT SCALING LAWS IN ANELASTIC SPHERICAL SHELL DYNAMOS  

SciTech Connect

Numerical dynamo models always employ parameter values that differ by orders of magnitude from the values expected in natural objects. However, such models have been successful in qualitatively reproducing properties of planetary and stellar dynamos. This qualitative agreement fuels the idea that both numerical models and astrophysical objects may operate in the same asymptotic regime of dynamics. This can be tested by exploring the scaling behavior of the models. For convection-driven incompressible spherical shell dynamos with constant material properties, scaling laws had been established previously that relate flow velocity and magnetic field strength to the available power. Here we analyze 273 direct numerical simulations using the anelastic approximation, involving also cases with radius-dependent magnetic, thermal, and viscous diffusivities. These better represent conditions in gas giant planets and low-mass stars compared to Boussinesq models. Our study provides strong support for the hypothesis that both mean velocity and mean magnetic field strength scale as a function of the power generated by buoyancy forces in the same way for a wide range of conditions.

Yadav, Rakesh K.; Gastine, Thomas; Christensen, Ulrich R. [Max-Planck-Institut fuer Sonnensystemforschung, Max Planck Strasse 2, D-37191 Katlenburg-Lindau (Germany); Duarte, Lucia D. V., E-mail: yadav@mps.mpg.de [Also at the Technische Universitaet Braunschweig (Germany)

2013-09-01T23:59:59.000Z

295

Restoration of Secondary Containment in Double Shell Tank (DST) Pits  

SciTech Connect

Cracks found in many of the double-shell tank (DST) pump and valve pits bring into question the ability of the pits to provide secondary containment and remain in compliance with State and Federal regulations. This study was commissioned to identify viable options for maintain/restoring secondary containment capability in these pits. The basis for this study is the decision analysis process which identifies the requirements to be met and the desired goals (decision criteria) that each option will be weighed against. A facilitated workshop was convened with individuals knowledgeable of Tank Farms Operations, engineering practices, and safety/environmental requirements. The outcome of this workshop was the validation or identification of the critical requirements, definition of the current problem, identification and weighting of the desired goals, baselining of the current repair methods, and identification of potential alternate solutions. The workshop was followed up with further investigations into the potential solutions that were identified in the workshop and through other efforts. These solutions are identified in the body of this report. Each of the potential solutions were screened against the list of requirements and only those meeting the requirements were considered viable options. To expand the field of viable options, hybrid concepts that combine the strongest features of different individual approaches were also examined. Several were identified. The decision analysis process then ranked each of the viable options against the weighted decision criteria, which resulted in a recommended solution. The recommended approach is based upon installing a sprayed on coating system.

SHEN, E.J.

2000-10-05T23:59:59.000Z

296

Terrorism, rugby, and hospitality: She?ll be right  

Science Journals Connector (OSTI)

Abstract In 2011, international attention was focused on New Zealand, host of the Rugby World Cup (RWC 2011), which brought 133,200 visitors to New Zealand over a three-month period. This exploratory study, undertaken before the event, investigates the attitudes of hotel managers and staff as they prepared to host spectators, rugby teams, and media personnel. The aim of the study was to determine preparedness for an attack, and assess attitudes and approaches to risk management in relation to terrorism. Interview data collected from senior hospitality managers revealed a distinctly laissez faire approach to security, which is partly explained by Hofstede?s (1984) low uncertainty avoidance category for New Zealand. This attitude is reputedly common in New Zealand, where it is proudly expressed as "she?ll be right". It is hoped that this study will bring attention to the weak security measures in New Zealand, which would have been insufficient protection for life and property, had a serious terrorist attack been planned.

Cyril Peter; Jill Poulston; Erwin Losekoot

2014-01-01T23:59:59.000Z

297

III-nitride core–shell nanowire arrayed solar cells  

Science Journals Connector (OSTI)

A solar cell based on a hybrid nanowire–film architecture consisting of a vertically aligned array of InGaN/GaN multi-quantum well core–shell nanowires which are electrically connected by a coalesced p-InGaN canopy layer is demonstrated. This unique hybrid structure allows for standard planar device processing, solving a key challenge with nanowire device integration, while enabling various advantages by the nanowire absorbing region such as higher indium composition InGaN layers by elastic strain relief, more efficient carrier collection in thinner layers, and enhanced light trapping from nano-scale optical index changes. This hybrid structure is fabricated into working solar cells exhibiting photoresponse out to 2.1 eV and short-circuit current densities of ~1 mA cm?2 under 1 sun AM1.5G. This proof-of-concept nanowire-based device demonstrates a route forward for high-efficiency III-nitride solar cells.

Jonathan J Wierer Jr; Qiming Li; Daniel D Koleske; Stephen R Lee; George T Wang

2012-01-01T23:59:59.000Z

298

Relativistic outflow from two thermonuclear shell flashes on neutron stars  

E-Print Network (OSTI)

We study the exceptionally short (32-41 ms) precursors of two intermediate-duration thermonuclear X-ray bursts observed with RXTE from the neutron stars in 4U 0614+09 and 2S 0918-549. They exhibit photon fluxes that surpass those at the Eddington limit later in the burst by factors of 2.6 to 3.1. We are able to explain both the short duration and the super-Eddington flux by mildly relativistic outflow velocities of 0.1$c$ to 0.3$c$ subsequent to the thermonuclear shell flashes on the neutron stars. These are the highest velocities ever measured from any thermonuclear flash. The precursor rise times are also exceptionally short: about 1 ms. This is inconsistent with predictions for nuclear flames spreading laterally as deflagrations and suggests detonations instead. This is the first time that a detonation is suggested for such a shallow ignition column depth ($y_{\\rm ign}$ = 10$^{10}$ g cm$^{-2}$). The detonation would possibly require a faster nuclear reaction chain, such as bypassing the alpha-capture on $^...

Zand, Jean in 't; Cavecchi, Yuri

2014-01-01T23:59:59.000Z

299

The cooling rate of neutron stars after thermonuclear shell flashes  

E-Print Network (OSTI)

Thermonuclear shell flashes on neutron stars are detected as bright X-ray bursts. Traditionally, their decay is modeled with an exponential function. However, this is not what theory predicts. The expected functional form for luminosities below the Eddington limit, at times when there is no significant nuclear burning, is a power law. We tested the exponential and power-law functional forms against the best data available: bursts measured with the high-throughput Proportional Counter Array (PCA) on board the Rossi X-ray Timing Explorer. We selected a sample of 35 'clean' and ordinary (i.e., shorter than a few minutes) bursts from 14 different neutron stars that 1) show a large dynamic range in luminosity, 2) are the least affected by disturbances by the accretion disk and 3) lack prolonged nuclear burning through the rp-process. We find indeed that for every burst a power law is a better description than an exponential function. We also find that the decay index is steep, 1.8 on average, and different for eve...

Zand, J J M in 't; Triemstra, T L; Mateijsen, R A D A; Bagnoli, T

2013-01-01T23:59:59.000Z

300

U-157: Ruby Mail Gem Directory Traversal and Shell Command Injection  

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

57: Ruby Mail Gem Directory Traversal and Shell Command 57: Ruby Mail Gem Directory Traversal and Shell Command Injection Vulnerabilities U-157: Ruby Mail Gem Directory Traversal and Shell Command Injection Vulnerabilities April 27, 2012 - 7:00am Addthis PROBLEM: Ruby Mail Gem Directory Traversal and Shell Command Injection Vulnerabilities PLATFORM: Mail gem for Ruby 2.x ABSTRACT: Some vulnerabilities have been reported in the Mail gem for Ruby, which can be exploited by malicious people to manipulate certain data and compromise a vulnerable system. Reference Links: Secunia Advisory SA48970 CVE-2012-2139 CVE-2012-2140 IMPACT ASSESSMENT: Medium Discussion: Input passed via the "to" parameter within the file delivery method is not properly verified before being used and can be exploited to modify arbitrary files via directory traversal attacks. Certain input passed to

Note: This page contains sample records for the topic "rebound effect shell" 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

Working and Net Available Shell Storage Capacity as of September 30, 2010 -  

Gasoline and Diesel Fuel Update (EIA)

Working and Net Available Shell Storage Capacity Working and Net Available Shell Storage Capacity With Data for September 2010 | Release Date: July 28, 2011 Working and Net Available Shell Storage Capacity as of September 30, 2010 is the Energy Information Administration's (EIA) first report containing semi-annual storage capacity data. It includes three tables detailing working and net available shell storage capacity by facility type, product, and PAD District as of September 30, 2010. EIA has reported weekly and monthly inventory levels of crude oil and petroleum products for decades. New storage capacity data can help analysts place petroleum inventory levels in context and better understand petroleum market activity and price movements, especially at key market centers such as Cushing, Oklahoma.

302

Retrieval of Ninth Single-Shell Tank Complete | Department of Energy  

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

Retrieval of Ninth Single-Shell Tank Complete Retrieval of Ninth Single-Shell Tank Complete Retrieval of Ninth Single-Shell Tank Complete September 6, 2012 - 12:00pm Addthis Media Contacts Lori Gamache, ORP 509-372-9130 Rob Roxburgh, WRPS 509-376-5188 Richland - Washington River Protection Solutions (WRPS) has completed the retrieval of radioactive and chemical waste from single-shell tank (SST) C-104, an underground storage tank that once held 259,000 gallons of waste left over from nuclear weapons production at Hanford. WRPS is the tank operations contractor for the U.S. Department of Energy (DOE) Office of River Protection (ORP). Tank C-104 is a 530,000-gallon-capacity SST that once contained the second-highest waste volume of the 16 SSTs in Hanford's C Farm, including a significant amount of plutonium and uranium.

303

Platinum-Maghemite Core-Shell Nanoparticles Using a Sequential Synthesis  

SciTech Connect

OAK-B135 Pt{at}Fe2O3 core-shell nanoparticles have been made using a sequential synthetic method. Platinum nanoparticles were synthesized via reduction of platinum acetylacetonate in octyl ether, and layers of iron oxide were subsequently deposited on the surface of Pt nanoparticles through thermal decomposition of iron pentacarbonyl. The core-shell nanoparticles were characterized by powder X-ray diffraction, high-resolution transmission electron microscopy, and X-ray photoemission spectroscopy. Thickness of the shell can be controlled by changing concentrations of the reactants and the reaction conditions. These Pt{at}Fe2O3 core-shell nanoparticles could have potential applications in catalysis and as precursors for making property-tunable magnetic nanoparticles, thin films, and nanocomposites.

Teng, X.; Black, D.; Watkins, N.J.; Gao, Y.; Yang, H.

2003-01-11T23:59:59.000Z

304

Determination of monolayer-protected gold nanoparticle ligand–shell morphology using NMR  

E-Print Network (OSTI)

It is accepted that the ligand shell morphology of nanoparticles coated with a monolayer of molecules can be partly responsible for important properties such as cell membrane penetration and wetting. When binary mixtures ...

Liu, Xiang

305

The attachment of amino fragment to purine: inner-shell structures and spectra  

Science Journals Connector (OSTI)

The impact of the amino fragment attachment on the inner-shell structures and spectra of unsubstituted purine and the purine ring of adenine is studied using density functional theory.

Saha, S.

2008-02-19T23:59:59.000Z

306

Microsoft Word - Little Shell Final Draft CX 7-15-2013  

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

Little Shell Property funding Fish and Wildlife Project No. and Contract No.: 2002-003-00, BPA-007168 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.25...

307

Conductive composites based on core–shell polyaniline nanoclay by latex blending  

Science Journals Connector (OSTI)

A simple and versatile method for the preparation of conductive composites based on core–shell polyaniline (PANI) one-dimensional nanoclay distributed in poly(ethylene-vinyl acetate) ( ... and anilinium salts. Tw...

Yingfeng Yu; Xinhui Zhong; Wenjun Gan

2009-04-01T23:59:59.000Z

308

Formation of Colloidal Shells on Acidic Droplets Undergoing Neutralization in Marine Diesel Engine Cylinder Oils  

Science Journals Connector (OSTI)

In this study, a novel colloidal shell formation phenomenon was observed when sulfuric acid droplets underwent neutralization in marine cylinder lubricant at 115 ± 5 °C ... the formation of well-known deposits fo...

Miguel Garcia-Bermudes; Riccardo Rausa; Kyriakos Papadopoulos

2013-07-01T23:59:59.000Z

309

CONSTRUCTION METHOD STUDY FOR INSTALLATION OF A LARGE RISER IN A SINGLE-SHELL TANK  

SciTech Connect

This study evaluates and identifies a construction method for cutting a hole in a single-shell tank dome. This study also identifies and evaluates vendors for performing the cut.

ADKISSON DA

2010-08-04T23:59:59.000Z

310

Excitation energies and Stokes shifts from a restricted open-shell Kohn-Sham approach  

E-Print Network (OSTI)

Restricted open-shell Kohn-Sham (ROKS) theory provides a powerful computational tool for calculating singlet excited state energies and dynamics. However, the possibility of multiple solutions to the ROKS equations — with ...

Kowalczyk, Tim

311

Preventing Buoyant Displacement Gas Release Events in Hanford Double-Shell Waste Tanks  

SciTech Connect

This report summarizes the predictive methods used to ensure that waste transfer operations in Hanford waste tanks do not create waste configurations that lead to unsafe gas release events. The gas release behavior of the waste in existing double-shell tanks has been well characterized, and the flammable gas safety issues associated with safe storage of waste in the current configuration are being formally resolved. However, waste is also being transferred between double-shell tanks and from single-shell tanks into double-shell tanks by saltwell pumping and sluicing that create new wastes and waste configurations that have not been studied as well. Additionally, planning is underway for various waste transfer scenarios to support waste feed delivery to the proposed vitrification plant. It is critical that such waste transfers do not create waste conditions with the potential for dangerous gas release events.

Meyer, Perry A.; Stewart, Charles W.

2001-01-01T23:59:59.000Z

312

Stress fields in hollow core–shell spherical electrodes of lithium ion batteries  

Science Journals Connector (OSTI)

...core-shell spherical electrodes of lithium ion batteries Yingjie Liu 1 Pengyu Lv...System, Department of Mechanics and Engineering Science, College of Engineering...structure design of electrodes of lithium ion batteries. lithium ion battery...

2014-01-01T23:59:59.000Z

313

Application to Export Electric Energy OE Doc No. EA-339-A Shell...  

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

: Federal Register Notice, Volume 78, No. 45 - March 7, 2013 Application to Export Electric Energy OE Doc No. EA-339-A Shell Energy North America (US), L.P.: Federal Register...

314

Portland cement mortar modified with latex and fiber glass for thin shell construction  

E-Print Network (OSTI)

with latex and fiber glass as a covering material for thin shell structures. Tests were conducted on various formulations to determine certain physical properties of the modified portland cement. Application techniques were investigated to determine...

Raymond, Jewell Duane

1963-01-01T23:59:59.000Z

315

Development and characterization of 17 microsatellite markers for Chinese soft-shelled turtle, Pelodiscus sinensis  

Science Journals Connector (OSTI)

...A set of 17 polymorphic microsatellite markers were isolated and characterized for the Chinese soft-shelled turtle (Pelodiscus sinensis) using a next generation sequencing approach. The number of alleles per l...

Xiao Ma; Gang Xiong; Luming Wang; Luqi Yan; Xuejun Li…

2014-12-01T23:59:59.000Z

316

Aqueous Synthesis of Zinc Blende CdTe/CdS Magic-Core/Thick-Shell...  

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

CdTeCdS Magic-CoreThick-Shell Tetrahedral Shaped Nanocrystals with Emission Tunable to Near-Infrared Authors: Deng, Z., Schulz, O., Lin, S., Ding, B., Liu, X., Wei, X., Ros, R.,...

317

Pyritization of fossil mollusk shells and some problems of supergene sulfide formation  

Science Journals Connector (OSTI)

The study of specific features of the pyritization of mollusk fossil shells has provided new evidence of the relationship between the generation of hydrosulfides during the bacterial reduction of sulfates and ...

L. Ya. Kizil’shtein

318

Hanford Determines Double-Shell Tank Leaked Waste From Inner Tank |  

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

Determines Double-Shell Tank Leaked Waste From Inner Tank Determines Double-Shell Tank Leaked Waste From Inner Tank Hanford Determines Double-Shell Tank Leaked Waste From Inner Tank October 22, 2012 - 12:00pm Addthis Media Contacts Lori Gamache, ORP 509-372-9130 John Britton, WRPS 509-376-5561 RICHLAND - The Department of Energy's Office of River Protection (ORP), working with its Hanford tank operations contractor Washington River Protection Solutions, has determined that there is a slow leak of chemical and radioactive waste into the annulus space in Tank AY-102, the approximately 30-inch area between the inner primary tank and the outer tank that serves as the secondary containment for these types of tanks. This is the first time a double-shell tank (DST) leak from the primary tank into the annulus has been identified. There is no indication of waste in

319

Characterization of Post-mortem Shell Alteration in Aransas Bay, Texas  

E-Print Network (OSTI)

Accumulations of dead shells in both modern coastal settings and in the rock record contain valuable information on past ecosystems and environmental conditions. However, death assemblages are not simply snapshots of living communities; rather...

Schirm, David Edward

2013-06-04T23:59:59.000Z

320

Department of Energy, Shell Canada to Collaborate on CO2 Storage Project  

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

The Department of Energy (DOE) and Shell Canada announced today they intend to collaborate in field tests to validate advanced monitoring, verification, and accounting (MVA) technologies for underground storage of carbon dioxide (CO2).

Note: This page contains sample records for the topic "rebound effect shell" 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

Development of the Shell-Koppers Coal Gasification Process [and Discussion  

Science Journals Connector (OSTI)

...research-article Development of the Shell-Koppers...entrained-bed technology, is characterized...production of a clean gas without by-products...featuring both gas and steam turbines. The integration...feed coals. The development programme includes...

1981-01-01T23:59:59.000Z

322

Modifying yolk fatty acid composition to improve the health quality of shell eggs  

E-Print Network (OSTI)

MODIFYING YOLK FATTY ACID COMPOSITION TO IMPROVE THE HEALTH QUALITY OF SHELL EGGS A Thesis by MARY ELIZABETH VAN ELSWYK 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 1990 Major Subject: Nutrition MODIFYING YOLK FATTY ACID COMPOSITION TO IMPROVE THE HEALTH QUALITY OF SHELL EGGS A Thesis by MARY ELIZABETH VAN ELSWYK Approved as to style and content by: Pamela S. Har s (Chair...

Van Elswyk, Mary Elizabeth

2012-06-07T23:59:59.000Z

323

GSH23.0-0.7+117, a neutral hydrogen shell in the inner Galaxy  

E-Print Network (OSTI)

GSH23.0-0.7+117 is a well-defined neutral hydrogen shell discovered in the VLA Galactic Plane Survey (VGPS). Only the blueshifted side of the shell was detected. The expansion velocity and systemic velocity were determined through the systematic behavior of the HI emission with velocity. The center of the shell is at (l,b,v)=(23.05,-0.77,+117 km/s). The angular radius of the shell is 6.8', or 15 pc at a distance of 7.8 kpc. The HI mass divided by the volume of the half-shell implies an average density n_H = 11 +/- 4 cm^{-3} for the medium in which the shell expanded. The estimated age of GSH23.0-0.7+117 is 1 Myr, with an upper limit of 2 Myr. The modest expansion energy of 2 * 10^{48} erg can be provided by the stellar wind of a single O4 to O8 star over the age of the shell. The 3 sigma upper limit to the 1.4 GHz continuum flux density (S_{1.4} wind bubble is not adiabatic, or the bubble has burst (as suggested by the HI channel maps), agreement between the energy and ionization requirements is even less likely. The limit set by the non-detection in the continuum provides a significant challenge for the interpretation of GSH23.0-0.7+117 as a stellar wind bubble. A similar analysis may be applicable to other Galactic HI shells that have not been detected in the continuum.

J. M. Stil; A. R. Taylor; P. G. Martin; T. A. Rothwell; J. M. Dickey; N. M. McClure-Griffiths

2004-02-19T23:59:59.000Z

324

Dynamic analysis of shells of revolution submerged in an acoustic medium by the finite element method  

E-Print Network (OSTI)

of the spherical shell transformation matrix relating (q} and (u) for an element generalized added mass matrix due to radiated pressure matrix relating (q) and (I) for an element unknown source strength velocity of sound in fluid coupled equivalent nodal load... A method 1s presented for the evaluation of the displacements and the surface pressure which are induced by the harmonic exc1tation of a shell of revolution submerged in an acoustic medium. The method utilizes a source distribution approach...

Ng, Chi Kin

1978-01-01T23:59:59.000Z

325

A comparison of selected quality and compositional characteristics of brown and white shell eggs  

E-Print Network (OSTI)

for the degree of MASTER OF SCIENCE December 1982 Major Subject: Food Science and Tecnnology A COMPARISON OF SELECTED QUALITI AND COMPOSITIONAL CHARACTERISITICS OF HROWN AND WHITE SHELL EGGS A Thesis by PATRICIA ANN CURTIS Approved as to style... and cortent by: (Chairman of Committee) (Department ead) (Member) -'(, ( ember) ip (Member) December 1982 ABSTRACT A Comparison of Selected Quality and Compositional Characteristics of Brown and White Shell Eggs (December 1982) Patricia Ann Curtis...

Curtis, Patricia Ann

1982-01-01T23:59:59.000Z

326

A comparison of selected physical characteristics of brown and white shell eggs  

E-Print Network (OSTI)

OF SCIENCE May 1982 Ma jor Suhject: Poultry Science A COMPARISON OF SELECTED PHYSICAL CHARACTERISTICS OF BROWN AND WHITE SHELL EGGS A Thesis by CECILY LYNN WASHINGTON Approved as to style and content by: (Chairman of Co ttee) (Member (Member...) (Member) (Member ) (M er) (Head of Depart nt) May 1982 A COMPARISON OF SELECTED PHYSICAL CHARACTERISTICS OF BROWN AND WHITE SHELL EGGS A Thesis by CECILY LYNN WASHINGTON Submitted to the Graduate College of Texas A & M University in partial...

Washington, Cecily Lynn

1982-01-01T23:59:59.000Z

327

Measurement of an Explosively Driven Hemispherical Shell Using 96 Points of Optical Velocimetry  

SciTech Connect

We report the measurement of the surface motion of a hemispherical copper shell driven by high explosives. This measurement was made using three 32-channel multiplexed photonic Doppler velocimetry (PDV) systems, in combination with a novel compound optical probe. Clearly visible are detailed features of the motion of the shell over time, enhanced by spatial correlation. Significant non-normal motion is apparent, and challenges in measuring such a geometry are discussed.

Danielson, J. R. [LANL; Daykin, E P [NSTec; Diaz, A. B. [NSTec; Doty, D. L. [LANL; Frogget, B. C. [NSTec; Furlanetto, M. R. [LANL; Gallegos, C. H. [NSTec; Gibo, M [NSTec; Garza, A [NSTec; Holtkamp, D B [LANL; Hutchins, M S [NSTec; Perez, C [NSTec; Perez, C [NSTec; Pena, M [NSTec; Romero, V T [NSTec; Shinas, M A [LANL; Teel, M G [NSTec; Tabaka, L J [LANL

2014-04-01T23:59:59.000Z

328

Review of technologies for the pretreatment of retrieved single-shell tank waste at Hanford  

SciTech Connect

The purpose of the study reported here was to identify and evaluate innovative processes that could be used to pretreat mixed waste retrieved from the 149 single-shell tanks (SSTs) on the US Department of Energy's (DOE) Hanford site. The information was collected as part of the Single Shell Tank Waste Treatment project at Pacific Northwest Laboratory (PNL). The project is being conducted for Westinghouse Hanford Company under their SST Disposal Program.

Gerber, M.A.

1992-08-01T23:59:59.000Z

329

Review of technologies for the pretreatment of retrieved single-shell tank waste at Hanford  

SciTech Connect

The purpose of the study reported here was to identify and evaluate innovative processes that could be used to pretreat mixed waste retrieved from the 149 single-shell tanks (SSTs) on the US Department of Energy`s (DOE) Hanford site. The information was collected as part of the Single Shell Tank Waste Treatment project at Pacific Northwest Laboratory (PNL). The project is being conducted for Westinghouse Hanford Company under their SST Disposal Program.

Gerber, M.A.

1992-08-01T23:59:59.000Z

330

Shell model nuclear matrix elements for competing mechanisms contributing to double beta decay  

SciTech Connect

Recent progress in the shell model approach to the nuclear matrix elements for the double beta decay process are presented. This includes nuclear matrix elements for competing mechanisms to neutrionless double beta decay, a comparison between closure and non-closure approximation for {sup 48}Ca, and an updated shell model analysis of nuclear matrix elements for the double beta decay of {sup 136}Xe.

Horoi, Mihai [Department of Physics, Central Michigan University, Mount Pleasant, Michigan, 48859 (United States)

2013-12-30T23:59:59.000Z

331

K-Shell Diagram and Hypersatellite Spectra of 4D Transition Elements  

SciTech Connect

The K-shell diagram (K{alpha}{sub 1,2} and K{beta}{sub 1,3}) and hypersatellite (HS) (K{sup h}{alpha}{sub 1,2}) spectra of Y, Zr, Mo, and Pd have been measured with high energy-resolution using photoexcitation by 90 keV synchrotron radiation. Comparison of the measured and ab initio calculated HS spectra demonstrates the importance of quantum electrodynamical (QED) effects for the HS spectra. Phenomenological fits of the measured spectra by Voigt functions yield accurate values for the shift of the HS from the diagram lines, the splitting of the HS lines, and their intensity ratio. Good agreement with theory was found for all quantities except for the intensity ratio, which is dominated by the intermediacy of the coupling of the angular momenta. The observed deviations imply that our current understanding of the variation of the coupling scheme from LS to jj across the periodic table may require some revision.

Diamant, R.; Kao, C.; Huotari, S.; Hamalainen, K.; Sharon, R.; Honkimaki, V.; Buslaps, T.; Deutsch, M.

2009-07-25T23:59:59.000Z

332

Evaluation of Ultrasonic Measurement Variation in the Double-Shell Tank Integrity Project  

SciTech Connect

Washington River Protection Solutions (WRPS) under contract from the U.S. Department of Energy (DOE) is responsible for assessing the condition of the double-shell tanks (DST) on the Hanford nuclear site. WRPS has contracted with AREVA Federal Services LLC (AFS) to perform ultrasonic testing (UT) inspections of the 28 DSTs to assess the condition of the tanks, judge the effects of past corrosion control practices, and satisfy a regulatory requirement to periodically assess the integrity of the tanks. Since measurement inception in 1997, nine waste tanks have been examined twice (at the time of this report) providing UT data that can now be compared over specific areas. During initial reviews of these two comparable data sets, average UT wall-thickness measurement reductions were noted in most of the tanks. This variation could be a result of actual wall thinning occurring on the waste-tanks walls, or some other unexplained anomaly resulting from measurement error due to causes such as the then-current measurement procedures, operator setup, or equipment differences. WRPS contracted with the Pacific Northwest National Laboratory (PNNL) to assist in understanding why this variation exists and where it stems from.

Pardini, Allan F.; Weier, Dennis R.; Crawford, Susan L.; Munley, John T.

2010-01-12T23:59:59.000Z

333

ESTIMATING HIGH LEVEL WASTE MIXING PERFORMANCE IN HANFORD DOUBLE SHELL TANKS  

SciTech Connect

The ability to effectively mix, sample, certify, and deliver consistent batches of high level waste (HLW) feed from the Hanford double shell tanks (DSTs) to the Waste Treatment and Immobilization Plant (WTP) presents a significant mission risk with potential to impact mission length and the quantity of HLW glass produced. The Department of Energy's (DOE's) Tank Operations Contractor (TOC), Washington River Protection Solutions (WRPS) is currently demonstrating mixing, sampling, and batch transfer performance in two different sizes of small-scale DSTs. The results of these demonstrations will be used to estimate full-scale DST mixing performance and provide the key input to a programmatic decision on the need to build a dedicated feed certification facility. This paper discusses the results from initial mixing demonstration activities and presents data evaluation techniques that allow insight into the performance relationships of the two small tanks. The next steps, sampling and batch transfers, of the small scale demonstration activities are introduced. A discussion of the integration of results from the mixing, sampling, and batch transfer tests to allow estimating full-scale DST performance is presented.

THIEN MG; GREER DA; TOWNSON P

2011-01-13T23:59:59.000Z

334

HIGH-LEVEL WASTE FEED CERTIFICATION IN HANFORD DOUBLE-SHELL TANKS  

SciTech Connect

The ability to effectively mix, sample, certify, and deliver consistent batches of High Level Waste (HLW) feed from the Hanford Double Shell Tanks (DST) to the Waste Treatment and Immobilization Plant (WTP) presents a significant mission risk with potential to impact mission length and the quantity of HLW glass produced. DOE's River Protection Project (RPP) mission modeling and WTP facility modeling assume that individual 3785 cubic meter (l million gallon) HLW feed tanks are homogenously mixed, representatively sampled, and consistently delivered to the WTP. It has been demonstrated that homogenous mixing ofHLW sludge in Hanford DSTs is not likely achievable with the baseline design thereby causing representative sampling and consistent feed delivery to be more difficult. Inconsistent feed to the WTP could cause additional batch-to-batch operational adjustments that reduce operating efficiency and have the potential to increase the overall mission length. The Hanford mixing and sampling demonstration program will identify DST mixing performance capability, will evaluate representative sampling techniques, and will estimate feed batch consistency. An evaluation of demonstration program results will identify potential mission improvement considerations that will help ensure successful mission completion. This paper will discuss the history, progress, and future activities that will define and mitigate the mission risk.

THIEN MG; WELLS BE; ADAMSON DJ

2010-01-14T23:59:59.000Z

335

Pair-truncated shell-model analysis of nuclei around mass 130  

SciTech Connect

Low-lying states for even-even, odd-mass, and doubly odd nuclei in the mass A{approx}130 region are systematically investigated using a pair-truncated shell model. In this model the collective nucleon pairs with angular momenta zero and two are the basic ingredients for even-even nuclei. Additional unpaired nucleons are added to the even-even core for a description of odd-mass and doubly odd nuclei. The effective interactions consist of single-particle energies and monopole and quadrupole pairing plus quadrupole-quadrupole interactions, whose strengths are assumed to be linearly changed as functions of the number of nucleons so as to describe the level schemes of the even-even and odd-mass nuclei. Energy levels of the low-lying collective states for even-even Xe, Ba, Ce, and Nd isotopes are reproduced very well along with intraband and interband B(E2) values, which simulate the typical features of the O(6) limit of the interacting boson model. For odd-mass and doubly odd nuclei, complicated level schemes and electromagnetic moments are in excellent agreement with the experimental data.

Higashiyama, Koji [Department of Physics, Chiba Institute of Technology, Narashino, Chiba 275-0023 (Japan); Yoshinaga, Naotaka [Department of Physics, Saitama University, Saitama City 338-8570 (Japan)

2011-03-15T23:59:59.000Z

336

Thermonuclear .Ia Supernovae from Helium Shell Detonations: Explosion Models and Observables  

Science Journals Connector (OSTI)

During the early evolution of an AM Canum Venaticorum system, helium is accreted onto the surface of a white dwarf under conditions suitable for unstable thermonuclear ignition. The turbulent motions induced by the convective burning phase in the He envelope become strong enough to influence the propagation of burning fronts and may result in the onset of a detonation. Such an outcome would yield radioactive isotopes and a faint rapidly rising thermonuclear ".Ia" supernova. In this paper, we present hydrodynamic explosion models and observable outcomes of these He shell detonations for a range of initial core and envelope masses. The peak UVOIR bolometric luminosities range by a factor of 10 (from 5 ? 1041 to 5 ? 1042 erg s–1), and the R-band peak varies from M R,peak = –15 to –18. The rise times in all bands are very rapid (40Ca through 56Ni) and unburnt He. Thus, the spectra around peak light lack signs of intermediate-mass elements and are dominated by Ca II and Ti II features, with the caveat that our radiative transfer code does not include the nonthermal effects necessary to produce He features.

Ken J. Shen; Dan Kasen; Nevin N. Weinberg; Lars Bildsten; Evan Scannapieco

2010-01-01T23:59:59.000Z

337

Contamination in marine turtle (Dermochelys coriaca) egg shells of Playon de Mexiquillo, Michoacan, Mexico  

SciTech Connect

Concern for the decreasing population sizes of marine turtles around the world is growing. Potential contamination within habitats of marine turtles, and human activities, such as poaching, modification of nesting sites, and capture of adult turtles, may be responsible for their decreasing populations. Little is known about the baseline levels and physiological effects of environmental contaminants on marine turtle populations. Responding to this concern, the Mexican government has designated areas along the Mexican coastline to preserve marine turtle nesting habitats. {open_quotes}Playon de Mexiquillo{close_quotes}, Michocan, Mexico is one of the coastal preservation areas located near the mouth of Rio la Manzanilla which flows between Sierra Madre del Sur and the Pacific Ocean. Samples of seawater, sand, and marine turtle egg (Dermochelys Coriaca) shells were collected monthly from October, 1992-March, 1993. Contaminants investigated were oil and grease, and metals (cadmium, copper, zinc, nickel, and lead). Seawater samples were collected where the turtles lay eggs in the preservation area and sand samples were taken from the area surrounding the eggs. 12 refs., 1 fig., 4 tabs.

Vazquez, G.F.; Reyes, M.C.; Fenandez, G. [Cd. Universitaria (Mexico)] [and others] [Cd. Universitaria (Mexico); and others

1997-02-01T23:59:59.000Z

338

Isogeometric rotation-free bending-stabilized cables: Statics, dynamics, bending strips and coupling with shells  

Science Journals Connector (OSTI)

Abstract An isogeometric cable formulation is derived from a 3D continuum, where large-deformation kinematics and the St. Venant–Kirchhoff constitutive law are assumed. It is also assumed that the cable cross-sections remain circular, planar, and orthogonal to the cable middle curve during the deformation. The cable geometry representation reduces to a curve in 3D space, and, because only displacement degrees of freedom are employed, only membrane and bending effects are accounted for in the modeling. Torsion is neglected and bending is confined to an osculating plane of the curve. In the case structural loading and response are confined to a plane, the formulation is reduced to a 2D Euler–Bernoulli beam of finite thickness. Bending terms also stabilize the cable formulation in the presence of compressive forces. The resulting cable formulation is validated in the regime of linear and nonlinear statics, and nonlinear dynamics. The concept of bending strips is extended to the case of multiple cables, and cable-shell coupling is also investigated. The formulation is presented in sufficient mathematical detail for straightforward computer implementation.

S.B. Raknes; X. Deng; Y. Bazilevs; D.J. Benson; K.M. Mathisen; T. Kvamsdal

2013-01-01T23:59:59.000Z

339

Evidence of significant down-conversion in a Si-based solar cell using CuInS{sub 2}/ZnS core shell quantum dots  

SciTech Connect

We report on the increase of up to 37.5% in conversion efficiency of a Si-based solar cell after deposition of light-emitting Cd-free, CuInS{sub 2}/ZnS core shell quantum dots on the active area of the cell due to the combined effect of down-conversion and the anti- reflecting property of the dots. We clearly distinguished the effect of down-conversion from anti-reflection and estimated an enhancement of up to 10.5% in the conversion efficiency due to down-conversion.

Gardelis, Spiros, E-mail: S.Gardelis@imel.demokritos.gr; Nassiopoulou, Androula G. [NCSR Demokritos INN, Terma Patriarchou Grigoriou, Aghia Paraskevi, 15310 Athens (Greece)

2014-05-05T23:59:59.000Z

340

Single-shell tank closure work plan. Revision A  

SciTech Connect

In January 1994, the Hanford Federal Facility Agreement and Conset Order (Tri-Party Agreement) was amended to reflect a revised strategy for remediation of radioactive waste in underground storage tanks. These amendments include milestones for closure of the single-shell tank (SST) operable units, to be initiated by March 2012 and completed by September 2024. This SST-CWP has been prepared to address the principal topical areas identified in Tri-Party Agreement Milestone M-45-06 (i.e., regulatory pathway, operable unit characterization, waste retrieval, technology development, and a strategy for achieving closure). Chapter 2.0 of this SST-CWP provides a brief description of the environmental setting, SST System, the origin and characteristics of SST waste, and ancillary equipment that will be remediated as part of SST operable unit closure. Appendix 2A provides a description of the hydrogeology of the Hanford Site, including information on the unsaturated sediments (vadose zone) beneath the 200 Areas Plateau. Chapter 3.0 provides a discussion of the laws and regulations applicable to closure of the SST farm operable units. Chapter 4.0 provides a summary description of the ongoing characterization activities that best align with the proposed regulatory pathway for closure. Chapter 5.0 describes aspects of the SST waste retrieval program, including retrieval strategy, technology, and sequence, potential tank leakage during retrieval, and considerations of deployment of subsurface barriers. Chapter 6.0 outlines a proposed strategy for closure. Chapter 7.0 provides a summary of the programs underway or planned to develop technologies to support closure. Ca. 325 refs.

NONE

1995-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" 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

DOUBLE-DETONATION SUB-CHANDRASEKHAR SUPERNOVAE: SYNTHETIC OBSERVABLES FOR MINIMUM HELIUM SHELL MASS MODELS  

SciTech Connect

In the double-detonation scenario for Type Ia supernovae, it is suggested that a detonation initiates in a shell of helium-rich material accreted from a companion star by a sub-Chandrasekhar-mass white dwarf. This shell detonation drives a shock front into the carbon-oxygen white dwarf that triggers a secondary detonation in the core. The core detonation results in a complete disruption of the white dwarf. Earlier studies concluded that this scenario has difficulties in accounting for the observed properties of Type Ia supernovae since the explosion ejecta are surrounded by the products of explosive helium burning in the shell. Recently, however, it was proposed that detonations might be possible for much less massive helium shells than previously assumed (Bildsten et al.). Moreover, it was shown that even detonations of these minimum helium shell masses robustly trigger detonations of the carbon-oxygen core (Fink et al.). Therefore, it is possible that the impact of the helium layer on observables is less than previously thought. Here, we present time-dependent multi-wavelength radiative transfer calculations for models with minimum helium shell mass and derive synthetic observables for both the optical and {gamma}-ray spectral regions. These differ strongly from those found in earlier simulations of sub-Chandrasekhar-mass explosions in which more massive helium shells were considered. Our models predict light curves that cover both the range of brightnesses and the rise and decline times of observed Type Ia supernovae. However, their colors and spectra do not match the observations. In particular, their B - V colors are generally too red. We show that this discrepancy is mainly due to the composition of the burning products of the helium shell of the Fink et al. models which contain significant amounts of titanium and chromium. Using a toy model, we also show that the burning products of the helium shell depend crucially on its initial composition. This leads us to conclude that good agreement between sub-Chandrasekhar-mass explosions and observed Type Ia supernovae may still be feasible but further study of the shell properties is required.

Kromer, M.; Sim, S. A.; Fink, M.; Roepke, F. K.; Seitenzahl, I. R.; Hillebrandt, W., E-mail: mkromer@mpa-garching.mpg.d [Max-Planck-Institut fuer Astrophysik, Karl-Schwarzschild-Strasse 1, D-85748 Garching (Germany)

2010-08-20T23:59:59.000Z

342

Accepted for publication in the IEEE Trans. on Fuzzy Systems. FuzzyShell: A LargeScale Expert System Shell using  

E-Print Network (OSTI)

as evidence becomes available for some others. While the use of fuzzy logic for control has mushroomed over System Shell using Fuzzy Logic for Uncertainty Reasoning \\Lambda y Juiyao Pan, Guilherme N. De that is particularly suitable for reasoning with fuzzy logic. The generalized Rete network consists of a cascade

Kak, Avinash

343

National Economic Rebound: Staying Power or "Recovery Lite"?  

E-Print Network (OSTI)

completed its resurgence. Plans are in the works for a major waterfront restoration and development project and a light rail project. Placement of a new sports arena is still under discussion. Newark is on the map" and corporate centers. It is home to Newark Liberty International Airport, the 12th busiest airport in the U

344

Numerical simulation of thin-shell direct drive DHe3-filled capsules fielded A. R. Miles, H.-K. Chung, R. Heeter, W. Hsing, J. A. Koch et al.  

E-Print Network (OSTI)

and rebounding in a high-intensity CO2 laser induced air plasma Phys. Plasmas 19, 073302 (2012) Feasibility to the DHe3 gas fill, in quantities sufficient to have an impact on yields, compression, and cooling rates in compressions that can be an order of magnitude higher than in undoped capsules. A baseline LASNEX simulation

345

Neutron shell structure and deformation in neutron-drip-line nuclei  

E-Print Network (OSTI)

Neutron shell-structure and the resulting possible deformation in the neighborhood of neutron-drip-line nuclei are systematically discussed, based on both bound and resonant neutron one-particle energies obtained from spherical and deformed Woods-Saxon potentials. Due to the unique behavior of weakly-bound and resonant neutron one-particle levels with smaller orbital angular-momenta $\\ell$, a systematic change of the shell structure and thereby the change of neutron magic-numbers are pointed out, compared with those of stable nuclei expected from the conventional j-j shell-model. For spherical shape with the operator of the spin-orbit potential conventionally used, the $\\ell_{j}$ levels belonging to a given oscillator major shell with parallel spin- and orbital-angular-momenta tend to gather together in the energetically lower half of the major shell, while those levels with anti-parallel spin- and orbital-angular-momenta gather in the upper half. The tendency leads to a unique shell structure and possible deformation when neutrons start to occupy the orbits in the lower half of the major shell. Among others, the neutron magic-number N=28 disappears and N=50 may disappear, while the magic number N=82 may presumably survive due to the large $\\ell =5$ spin-orbit splitting for the $1h_{11/2}$ orbit. On the other hand, an appreciable amount of energy gap may appear at N=16 and 40 for spherical shape, while neutron-drip-line nuclei in the region of neutron number above N=20, 40 and 82, namely N $\\approx$ 21-28, N $\\approx$ 41-54, and N $\\approx$ 83-90, may be quadrupole-deformed though the possible deformation depends also on the proton number of respective nuclei.

Ikuko Hamamoto

2012-05-29T23:59:59.000Z

346

Vapor Space Corrosion Testing Simulating The Environment Of Hanford Double Shell Tanks  

SciTech Connect

As part of an integrated program to better understand corrosion in the high level waste tanks, Hanford has been investigating corrosion at the liquid/air interface (LAI) and at higher areas in the tank vapor space. This current research evaluated localized corrosion in the vapor space over Hanford double shell tank simulants to assess the impact of ammonia and new minimum nitrite concentration limits, which are part of the broader corrosion chemistry limits. The findings from this study showed that the presence of ammonia gas (550 ppm) in the vapor space is sufficient to reduce corrosion over the short-term (i.e. four months) for a Hanford waste chemistry (SY102 High Nitrate). These findings are in agreement with previous studies at both Hanford and SRS which showed ammonia gas in the vapor space to be inhibitive. The presence of ammonia in electrochemical test solution, however, was insufficient to inhibit against pitting corrosion. The effect of the ammonia appears to be a function of the waste chemistry and may have more significant effects in waste with low nitrite concentrations. Since high levels of ammonia were found beneficial in previous studies, additional testing is recommended to assess the necessary minimum concentration for protection of carbon steel. The new minimum R value of 0.15 was found to be insufficient to prevent pitting corrosion in the vapor space. The pitting that occurred, however, did not progress over the four-month test. Pits appeared to stop growing, which would indicate that pitting might not progress through wall.

Wiersma, B.; Gray, J. R.; Garcia-Diaz, B. L.; Murphy, T. H.; Hicks, K. R.

2014-01-30T23:59:59.000Z

347

Structure of the particle-hole amplitudes in no-core shell model wave functions  

SciTech Connect

We study the structure of the no-core shell model wave functions for {sup 6}Li and {sup 12}C by investigating the ground state and first excited state electron scattering charge form factors. In both nuclei, large particle-hole (ph) amplitudes in the wave functions appear with the opposite sign to that needed to reproduce the shape of the (e,e{sup '}) form factors, the charge radii, and the B(E2) values for the lowest two states. The difference in sign appears to arise mainly from the monopole DELTA(Planck constant/2pi)omega=2 matrix elements of the kinetic and potential energy (T+V) that transform under the harmonic oscillator SU(3) symmetries as (lambda,mu)=(2,0). These are difficult to determine self-consistently, but they have a strong effect on the structure of the low-lying states and on the giant monopole and quadrupole resonances. The Lee-Suzuki transformation, used to account for the restricted nature of the space in terms of an effective interaction, introduces large higher-order DELTA(Planck constant/2pi)omega=n,n>2, ph amplitudes in the wave functions. The latter ph excitations aggravate the disagreement between the experimental and predicted (e,e{sup '}) form factors with increasing model spaces, especially at high momentum transfers. For sufficiently large model spaces, the situation begins to resolve itself for {sup 6}Li, but the convergence is slow. A prescription to constrain the ph excitations would likely accelerate convergence of the calculations.

Hayes, A. C. [Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Kwiatkowski, A. A. [National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)

2010-05-15T23:59:59.000Z

348

Inner-Shell Capture and Ionization in Collisions of H+, He2+, and Li3+ Projectiles with Neon and Carbon  

E-Print Network (OSTI)

PHYSICAL REVIEW A VOLUME 23, NUMBF R FEBRUARY 1981 Inner-shell capture and ionization in collisions of H+, He'+, and Li'+ projectiles with neon and carbon A. L. Ford~ and J. F. Reading* Physics Department, Texas A &M University, College Station...) Li++ Ne, and (d) H'+ C. The open triangles in (d) are results calculated with the carbon X-shell orbital energy adjusted to give the experimental K-shell binding energy. Note that the scale on the vertical axis is lin- ear. INNER-SHELL CAPTURE...

Ford, A. Lewis; Reading, John F.; Becker, R. L.

1981-01-01T23:59:59.000Z

349

RCRA Assessment Plan for Single-Shell Tank Waste Management Area A-AX at the Hanford Site  

SciTech Connect

This document describes a groundwater assessment plan for the single-shell tank systems in Waste Management Area A-AX at the Hanford Site.

Narbutovskih, Susan M.; Chou, Charissa J.

2006-03-03T23:59:59.000Z

350

Cofiring lignite with hazelnut shell and cotton residue in a pilot-scale fluidized bed combustor  

SciTech Connect

In this study, cofiring of high ash and sulfur content lignite with hazelnut shell and cotton residue was investigated in 0.3 MWt METU Atmospheric Bubbling Fluidized Bed Combustion (ABFBC) Test Rig in terms of combustion and emission performance of different fuel blends. The results reveal that cofiring of hazelnut shell and cotton residue with lignite increases the combustion efficiency and freeboard temperatures compared to those of lignite firing with limestone addition only. CO{sub 2} emission is not found sensitive to increase in hazelnut shell and cotton residue share in fuel blend. Cofiring lowers SO{sub 2} emissions considerably. Cofiring of hazelnut shell reduces NO and N{sub 2}O emissions; on the contrary, cofiring cotton residue results in higher NO and N{sub 2}O emissions. Higher share of biomass in the fuel blend results in coarser cyclone ash particles. Hazelnut shell and cotton residue can be cofired with high ash and sulfur-containing lignite without operational problems. 32 refs., 12 figs., 11 tabs.

Zuhal Gogebakan; Nevin Selcuk [Middle East Technical University, Ankara (Turkey). Department of Chemical Engineering

2008-05-15T23:59:59.000Z

351

The jump-off velocity of an impulsively loaded spherical shell  

SciTech Connect

We consider a constant temperature spherical shell of isotropic, homogeneous, linearly elastic material with density {rho} and Lame coefficients {lambda} and {mu}. The inner and outer radii of the shell are r{sub i} and r{sub o}, respectively. We assume that the inside of the shell is a void. On the outside of the shell, we apply a uniform, time-varying pressure p(t). We also assume that the shell is initially at rest. We want to compute the jump-off time and velocity of the pressure wave, which are the first time after t = 0 at which the pressure wave from the outer surface reaches the inner surface. This analysis computes the jump-off velocity and time for both compressible and incompressible materials. This differs substantially from [3], where only incompressible materials are considered. We will consider the behavior of an impulsively loaded, exponentially decaying pressure wave p(t) = P{sub 0{sup e}}{sup -{alpha}t}, where {alpha} {ge} 0. We notice that a constant pressure wave P(t) = P{sub 0} is a special case ({alpha} = 0) of a decaying pressure wave. Both of these boundary conditions are considered in [3].

Chabaud, Brandon M. [Los Alamos National Laboratory; Brock, Jerry S. [Los Alamos National Laboratory

2012-04-13T23:59:59.000Z

352

Supernovae from direct collisions of white dwarfs and the role of helium shell ignition  

E-Print Network (OSTI)

Models for supernovae (SNe) arising from thermonuclear explosions of white dwarfs (WDs) have been extensively studied over the last few decades, mostly focusing on the single degenerate (accretion of material of a WD) and double degenerate (WD-WD merger) scenarios. In recent years it was suggested that WD-WD direct collisions provide an additional channel for such explosions. Here we extend the studies of such explosions, and explore the role of Helium-shells in affecting the thermonuclear explosions. We study both the impact of low-mass helium ($\\sim0.01$ M$_{\\odot})$ shells, as well as high mass shells ($\\ge0.1$ M$_{\\odot}$). We find that detonation of the massive helium layers precede the detonation of the WD Carbon-Oxygen (CO) bulk during the collision and can change the explosive evolution and outcomes for the cases of high mass He-shells. In particular, the He-shell detonation propagates on the WD surface and inefficiently burns material prior to the CO detonation that later follows in the central parts...

Papish, Oded

2015-01-01T23:59:59.000Z

353

LANL* V1.0: a radiation belt drift shell model suitable for real-time and reanalysis applications  

SciTech Connect

Space weather modeling, forecasts, and predictions, especially for the radiation belts in the inner magnetosphere, require detailed information about the Earth's magnetic field. Results depend on the magnetic field model and the L* (pron. L-star) values which are used to describe particle drift shells. Space wather models require integrating particle motions along trajectories that encircle the Earth. Numerical integration typically takes on the order of 10{sup 5} calls to a magnetic field model which makes the L* calculations very slow, in particular when using a dynamic and more accurate magnetic field model. Researchers currently tend to pick simplistic models over more accurate ones but also risking large inaccuracies and even wrong conclusions. For example, magnetic field models affect the calculation of electron phase space density by applying adiabatic invariants including the drift shell value L*. We present here a new method using a surrogate model based on a neural network technique to replace the time consuming L* calculations made with modern magnetic field models. The advantage of surrogate models (or meta-models) is that they can compute the same output in a fraction of the time while adding only a marginal error. Our drift shell model LANL* (Los Alamos National Lab L-star) is based on L* calculation using the TSK03 model. The surrogate model has currently been tested and validated only for geosynchronous regions but the method is generally applicable to any satellite orbit. Computations with the new model are several million times faster compared to the standard integration method while adding less than 1% error. Currently, real-time applications for forecasting and even nowcasting inner magnetospheric space weather is limited partly due to the long computing time of accurate L* values. Without them, real-time applications are limited in accuracy. Reanalysis application of past conditions in the inner magnetosphere are used to understand physical processes and their effect. Without sufficiently accurate L* values, the interpretation of reanalysis results becomes difficult and uncertain. However, with a method that can calculate accurate L* values orders of magnitude faster, analyzing whole solar cycles worth of data suddenly becomes feasible.

Koller, Josep [Los Alamos National Laboratory; Reeves, Geoffrey D [Los Alamos National Laboratory; Friedel, Reiner H W [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

354

Workers Complete Retrieval of 11th Single-Shell Tank at EM's Hanford Site  

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

Workers Complete Retrieval of 11th Single-Shell Tank at EM's Workers Complete Retrieval of 11th Single-Shell Tank at EM's Hanford Site Workers Complete Retrieval of 11th Single-Shell Tank at EM's Hanford Site November 26, 2013 - 12:00pm Addthis A composite image comprised of dozens of photos taken inside C-110 provides a rare panoramic view of the tank interior. Portions of the tank floor and the FoldTrack waste-retrieval system are clearly visible. A composite image comprised of dozens of photos taken inside C-110 provides a rare panoramic view of the tank interior. Portions of the tank floor and the FoldTrack waste-retrieval system are clearly visible. Operators use multiple technologies to remove waste from underground storage tank RICHLAND, Wash. - EM's Office of River Protection and its tank farm contractor, Washington River Protection Solutions (WRPS), recently

355

Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment  

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

Long-Range Validity of Threshold Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment Print Wednesday, 29 March 2006 00:00 A threshold law describes the dependence of a reaction yield near a reaction threshold. It is also a signature of the physical forces involved in the reaction, so the agreement of an observed threshold behavior with a threshold law or a departure from it can be a sensitive probe into how well the reaction physics is understood. A collaboration from Western Michigan University, the ALS, and Denison University has now shown that the threshold laws for inner-shell photodetachment of negative ions are not only obeyed but can extend over a much wider energy range than theory had predicted.

356

A Survey of Vapors in the Headspaces of Single-Shell Waste Tanks  

SciTech Connect

This report summarizes data on the organic vapors in the single-shell high level radioactive waste tanks at the Hanford site to support a forthcoming toxicological study. All data were obtained from the Tank Characterization Database (PNNL 1999). The TCD contains virtually all the available tank headspace characterization data from 1992 to the present, and includes data for 109 different single-shell waste tanks. Each single-shell tank farm and all major waste types are represented. Descriptions of the sampling and analysis methods have been given elsewhere (Huckaby et al. 1995, Huckaby et al. 1996), and references for specific data are available in the TCD. This is a revision of a report with the same title issued on March 1, 2000 (Stock and Huckaby 2000).

Stock, Leon M.; Huckaby, James L.

2000-10-31T23:59:59.000Z

357

A New Class of Silica Crosslinked Micellar Core-Shell /nanoparticles."  

SciTech Connect

Micellar nanoparticles made of surfactants and polymers have attracted wide attention in the materials and biomedical community for controlled drug delivery, molecular imaging and sensing; however, their long-term stability remains a topic of intense study. Here we report a new class of robust, ultrafine (10nm) silica core-shell nanoparticles formed from silica crosslinked, individual block copolymer micelles. Compared with pure polymer micelles, the new core-shell nanoparticles have significantly improved stability and do not break down during dilution. They also achieve much higher loading capacity for a wide range of chemicals, with the entrapped molecules slowly released over a much longer period of time. A wide range of functional groups can be easily incorporated through co-condensation with the silica matrix. The potential to deliver hydrophobic agents into cancer cells has been demonstrated. Because of their unique properties, these novel core-shell nanoparticles could potentially provide a new nanomedicine platform for imaging, detection and treatment.

Huo, Qisheng; Liu, Jun; Wang, Li Q.; Jiang, Yingbing; Lambert, Timothy N.; Fang, Erica

2006-05-17T23:59:59.000Z

358

Elastic-plastic failure analysis of pressure burst tests of thin toroidal shells  

SciTech Connect

This paper provides a comparison between test and analysis results for bursting of thin toroidal shells. Testing was done by pressurizing two toroidal shells until failure by bursting. An analytical criterion for bursting is developed based on good agreement between structural instability predicted by large strain-large displacement elastic-plastic finite element analysis and observed burst pressure obtained from test. The failures were characterized by loss of local stability of the membrane section of the shells consistent with the predictions from the finite element analysis. Good agreement between measured and predicted burst pressure suggests that incipient structural instability as calculated by an elastic-plastic finite element analysis is a reasonable way to calculate the bursting pressure of thin membrane structures.

Jones, D.P.; Holliday, J.E.; Larson, L.D. [Bechtel Bettis, Inc., West Mifflin, PA (United States). Bettis Atomic Power Lab.

1999-05-01T23:59:59.000Z

359

Radiation from a source embedded in a two?layer coating of a spherical shell  

Science Journals Connector (OSTI)

Analysis of the acoustic field generated by a small source embedded in a viscoelastic layer encapsulating a spherical shell gives rise to several analytical difficulties not encountered in the classical problem of a point source in the surface of a rigid sphere. The present investigation addresses a double layer configuration in which the layer closest to the shell is acoustically soft whereas the outer layer in which the source is embedded has an impedance that matches that of the surrounding fluid water. The analysis is carried out by treating the layers as dissipative fluids while classical Love theory describes the interior shell. The analysis employs spherical harmonic expansions for each medium which is known as Mie series analysis in related studies of electromagneticscattering from coated series. Like the electromagnetic problem computational difficulties associated with the occurrence of spherical Bessel functions of complex argument arise but the remedies used there require modification.

Jerry H. Ginsberg

2007-01-01T23:59:59.000Z

360

Nuclear Shell Structure and Beta Decay I. Odd A Nuclei II. Even A Nuclei  

DOE R&D Accomplishments (OSTI)

In Part I a systematics is given of all transitions for odd A nuclei for which sufficiently reliable data are available. The allowed or forbidden characters of the transitions are correlated with the positions of the initial and final odd nucleon groups in the nuclear shell scheme. The nuclear shells show definite characteristics with respect to parity of the ground states. The latter is the same as the one obtained from known spins and magnetic moments in a one-particle interpretation. In Part II a systematics of the beta transitions of even-A nuclei is given. An interpretation of the character of the transitions in terms of nuclear shell structure is achieved on the hypothesis that the odd nucleon groups have the same structure as in odd-A nuclei, together with a simple coupling rule between the neutron and proton groups in odd-odd nuclei.

Mayer, M.G.; Moszkowski, S.A.; Nordheim, L.W.

1951-05-00T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" 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

Evidence for ablated flows in the shell of nova DQ Her  

E-Print Network (OSTI)

High-resolution longslit Halpha spectra of the shell of the old nova DQ Her have been obtained with the William Herschel Telescope using the ISIS spectrograph. An equatorial expansion velocity of 370+/-14 km/s is derived from the spectra which, in conjunction with a narrowband Halpha image of the remnant, allows a distance estimate of 525+/-28 pc. An equatorial ring which exhibits enhanced [NII] emission has also been detected and the inclination angle of the shell is found to be 86.8+/-0.2 degrees with respect to the line of sight. The spectra also reveal tails extending from the clumps in the shell, which have a radial velocity increasing along their length. This suggests the presence of a stellar wind, collimated in the polar direction, which ablates fragments of material from the clumps and accelerates them into its stream up to a terminal velocity of order 800-900 km/s.

N. M. H. Vaytet; T. J. O'Brien; A. P. Rushton

2007-06-01T23:59:59.000Z

362

"Table A7. Shell Storage Capacity of Selected Petroleum Products by Census"  

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

Shell Storage Capacity of Selected Petroleum Products by Census" Shell Storage Capacity of Selected Petroleum Products by Census" " Region, Industry Group, and Selected Industries, 1991" " (Estimates in Thousand Barrels)" " "," "," "," "," ","Other","RSE" "SIC"," ","Motor","Residual"," ","Distillate","Row" "Code(a)","Industry Groups and Industry","Gasoline","Fuel Oil","Diesel","Fuel Oil","Factors" ,,"Total United States" ,"RSE Column Factors:",1,0.9,1,1.1 , 20,"Food and Kindred Products",38,1448,306,531,12.1 2011," Meat Packing Plants",1,229,40,13,13.2

363

Addendum to ''Thin-shell wormholes supported by ordinary matter in Einstein-Gauss-Bonnet gravity''  

SciTech Connect

Thin-shell wormholes are constructed starting from the exotic branch of the Wiltshire spherically symmetric solution of Einstein-Gauss-Bonnet gravity. The energy-momentum tensor of the shell is studied, and it is shown that configurations supported by matter satisfying the energy conditions exist for certain values of the parameters. Differing from the previous result associated with the normal branch of the Wiltshire solution, this is achieved for small positive values of the Gauss-Bonnet parameter and for vanishing charge.

Simeone, Claudio [IFIBA-CONICET, and Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellon I, 1428, Buenos Aires (Argentina)

2011-04-15T23:59:59.000Z

364

Partial conservation of seniority in the j=9/2 shell: Analytic and numerical studies  

Science Journals Connector (OSTI)

Recent studies show that for systems with four identical fermions in the j=9/2 shell, two special states, which have seniority v=4 and total spins I=4 and 6, are eigenstates of any two-body interaction. These states have good seniority for an arbitrary interaction. In this work, an analytic proof is given to this peculiar occurrence of partial conservation of seniority, which is the consequence of the special property of certain coefficients of fractional parentage. Further calculations did not reveal its existence in systems with other n and/or I for shells with j?15/2.

Chong Qi

2011-01-20T23:59:59.000Z

365

Numerical methods of integration applied in the nonlinear dynamic analysis of shells of revolution  

E-Print Network (OSTI)

structural bel&avior a&d therefore cannot be used for nonlinear analyses. lhe second nðod of dynamic analysis uses numerical integra- tion of the equations of notion wit'bout necessitating a transforma- tion of coordinates. Tne numerical integration...!riinear beam analysis {first vibratory mode only) with the most prc!! ising methods b ing programmed for shell analy! es. Rea- listic test problems are used to evaluate three of the numerical integration procedures as applied in shell of revolution analyses...

Tillerson, Joe Richard

2012-06-07T23:59:59.000Z

366

Preparation of Nanoparticle Core?Shell Electrolyte Materials for Proton Ceramic Fuel Cells  

Science Journals Connector (OSTI)

Preparation of Nanoparticle Core?Shell Electrolyte Materials for Proton Ceramic Fuel Cells† ... Our work is developed in this direction, with the optimization of cermet electrodes(5) and perovskite-type cathodes(6) alongside the development of novel methods for preparation and proton ceramics in a form suitable for thin film deposition. ... We describe here an optimized route for the preparation of a nanoparticle core?shell structure which makes use of a metal ion containing hydrogel to disperse the BCY10 phase around a BZY10 core prepared by flash combustion in a previous step. ...

Zohreh Khani; Mélanie Taillades-Jacquin; Gilles Taillades; Deborah J. Jones; Mathieu Marrony; Jacques Rozière

2010-01-08T23:59:59.000Z

367

Inviscid Limits for a Stochastically Forced Shell Model of Turbulent Flow  

E-Print Network (OSTI)

We establish the anomalous mean dissipation rate of energy in the inviscid limit for a stochastic shell model of turbulent fluid flow. The proof relies on viscosity independent bounds for stationary solutions and on establishing ergodic and mixing properties for the viscous model. The shell model is subject to a degenerate stochastic forcing in the sense that noise acts directly only through one wavenumber. We show that it is hypo-elliptic (in the sense of Hormander) and use this property to prove a gradient bound on the Markov semigroup.

Susan Friedlander; Nathan Glatt-Holtz; Vlad Vicol

2014-04-03T23:59:59.000Z

368

A general theory of scattering by thin interface layers, plates, and shells.  

Science Journals Connector (OSTI)

In recent years there have been a number of attempts to model the effect of thin interface layers on the scattering and transmission of sound by bodies submerged in a continuous medium. Interface layers or coatings occur in numerous engineering acoustic applications. For example when two solid bodies are bonded together the adhesive or the imperfect fusion region will generally introduce an acoustic mismatch with both partners. Similarly the use of austenitic cladding as a protection against corrosion creates an analogous problem except that here the layer should be thought of as being fused to the surface of the material. In underwater and aeroacoustics the fluid–solid interactions with a shell or plate are often modeled using the Euler–Bernoulli thin plate theory. As far as the scattering problem here is concerned the thin plate equation appears as an ‘‘effective boundary condition’’ relating the transverse displacement to the fluid pressure. Similarly a thin interface layer between two solids is also modeled by some effective boundary condition. A typical approach is to assume that the layer is characterized by interfacial mass spring and damping constants. The latter are estimated by comparing the predictions of the model with the exact solutions to certain statical canonical problems. The difficulty with this approach is that generally it is not self?consistent. In other words if the spring constant is calculated so that the predictions of the model agree well with certain exact solutions at ‘‘normal incidence ’’ say then it is usually not the case that they give agreement under different loading conditions. Similarly in the fluid–solid interaction problem the Euler–Bernoulli theory gives a correct approximation to the dispersion relation for leaky antisymmetric Rayleigh–Lamb waves in a fluid?loaded thin plate but incorrectly predicts the transmission and reflection of a plane wave by such a plate in the fluid! In this paper these problems are addressed by developing a rational approximation scheme for an arbitrary thin layer immersed in a contrasting matrix. a)The author is currently on leave from The Department of Mathematics University of Manchester Manchester M13 9PL U.K.

Gerry Wickham

1992-01-01T23:59:59.000Z

369

Nonlinear analysis of smart composite plate and shell structures  

E-Print Network (OSTI)

embedability into host materials, such as the modern Carbon Fiber-Reinforced Polimeric (CFRP) composites, without significantly effecting the structural integrity. Considerable effort is spent to understand the interaction between magnetostrictive layers...

Lee, Seung Joon

2005-08-29T23:59:59.000Z

370

Tempestites in a teapot? Condensation-generated shell beds in the Upper Ordovician, Cincinnati Arch, USA  

Science Journals Connector (OSTI)

Skeletal concentrations in mudstones may represent local facies produced by storm winnowing in shallow water, or time-specific deposits related to intervals of diminished sediment supply. Upper Ordovician (Katian) of the Cincinnati region is a mixed siliciclastic-carbonate succession including meter-scale cycles containing a shelly limestone-dominated phase and a mudstone-dominated phase. The “tempestite proximality model” asserts that shell-rich intervals originated by winnowing of mud from undifferentiated fair-weather deposits. Thus shell beds are construed as tempestites, while interbedded mudstones represent either fair-weather or bypassed mud. Meter-scale cycles are attributed to sea-level fluctuation or varying storm intensity. Alternatively, the “episodic starvation model” argues, on the basis of petrographic, taphonomic, and stratigraphic evidence, that, despite widespread evidence for storms or other turbulence events (e.g. tsunamis), winnowing alone could not generate shell beds where none had previously existed. Instead, variations in sediment supply are construed as the principal cause of shelly-mudstone cycles. Shell-rich deposits accrue during periods of siliciclastic sediment starvation and relatively shell-free mud accumulates during periods of sediment influx. Tempestite proximality and episodic starvation models lead to contrasting predictions about proximal-to-distal facies patterns. These are: (i) large versus small volumes of distally-deposited, bypassed mud; (ii) proximal grainstones and distal packstones versus distal grainstones and proximal packstones; and (iii) proximal versus distal amalgamation and condensation of shell beds. In this paper, these predictions are tested by (i) comparing meter-scale cycles from different horizons and depositional environments through the lower Cincinnatian succession (Kope through McMillan Formations representing deep subtidal through intertidal environments), and (ii) correlating intervals and individual meter-scale cycles from the Fairview Formation of the Cincinnati Arch (shallow subtidal) north and west into the Maquoketa Shale (deep subtidal) in subsurface of Ohio and Indiana. Both approaches show patterns consistent with episodic starvation, not winnowing, including: (i) small differences in stratigraphic thickness indicate small volumes of bypassed mud; (ii) discrete distal deep-water grainstones that splay proximally into bundles of thinner shallow-water packstones alternating with shelly muds show that grainstones formed from a lack of, rather than removal of mud; and (iii) distal shell?bed amalgamation and condensation (and corresponding proximal splaying) of shell beds shows a proximal source of mud. Thus, winnowing by storms or other turbulence events did not generate shell beds or cycles from undifferentiated sediments despite abundant evidence for storm deposition. High-resolution correlations imply that the shell-bed and mud-bed hemicycles reflect simultaneous basin-wide changes in sedimentary style rather than contemporaneous facies belts that track sea level. In this sense, shell-rich and mud-rich hemicycles are “non-Waltherian” facies.

Benjamin F. Dattilo; Carlton E. Brett; Thomas J. Schramm

2012-01-01T23:59:59.000Z

371

Nonlinear geometric effects in mechanical bistable morphing structures  

E-Print Network (OSTI)

Bistable structures associated with non-linear deformation behavior, exemplified by the Venus flytrap and slap bracelet, can switch between different functional shapes upon actuation. Despite numerous efforts in modeling such large deformation behavior of shells, the roles of mechanical and nonlinear geometric effects on bistability remain elusive. We demonstrate, through both theoretical analysis and table-top experiments, that two dimensionless parameters control bistability. Our work classifies the conditions for bistability, and extends the large deformation theory of plates and shells.

Zi Chen; Qiaohang Guo; Carmel Majidi; Wenzhe Chen; David J. Srolovitz; Mikko P. Haataja

2012-06-20T23:59:59.000Z

372

Proceedings of a symposium on the occasion of the 40th anniversary of the nuclear shell model  

SciTech Connect

This report contains papers on the following topics: excitation of 1p-1h stretched states with the (p,n) reaction as a test of shell-model calculations; on Z=64 shell closure and some high spin states of {sup 149}Gd and {sup 159}Ho; saturating interactions in {sup 4}He with density dependence; are short-range correlations visible in very large-basis shell-model calculations ; recent and future applications of the shell model in the continuum; shell model truncation schemes for rotational nuclei; the particle-hole interaction and high-spin states near A-16; magnetic moment of doubly closed shell +1 nucleon nucleus {sup 41}Sc(I{sup {pi}}=7/2{sup {minus}}); the new magic nucleus {sup 96}Zr; comparing several boson mappings with the shell model; high spin band structures in {sup 165}Lu; optical potential with two-nucleon correlations; generalized valley approximation applied to a schematic model of the monopole excitation; pair approximation in the nuclear shell model; and many-particle, many-hole deformed states.

Lee, T.S.H.; Wiringa, R.B. (eds.)

1990-03-01T23:59:59.000Z

373

Misfit dislocations in multimetallic core-shelled nanoparticles Yong Ding, Xiaolian Sun, Zhong Lin Wang, and Shouheng Sun  

E-Print Network (OSTI)

Misfit dislocations in multimetallic core-shelled nanoparticles Yong Ding, Xiaolian Sun, Zhong Lin Wang, and Shouheng Sun Citation: Appl. Phys. Lett. 100, 111603 (2012); doi: 10.1063/1.3695332 View-shelled nanoparticles Yong Ding,1 Xiaolian Sun,2 Zhong Lin Wang,1,a) and Shouheng Sun2,a) 1 School of Materials Science

Wang, Zhong L.

374

Radionuclides, Trace Metals, and Organic Compounds in Shells of Native Freshwater Mussels Along the Hanford Reach of the Columbia River: 6000 Years Before Present to Current Times  

SciTech Connect

This report documents concentrations of radionuclides, trace metals, and semivolatile organic compounds measured in shell samples of the western pearl shell mussel collected along the Hanford Reach of the Columbia River.

B. L. Tiller; T. E. Marceau

2006-01-25T23:59:59.000Z

375

Subcritical scattering from buried elastic shells Irena Lucifredi and Henrik Schmidt  

E-Print Network (OSTI)

Subcritical scattering from buried elastic shells Irena Lucifredi and Henrik Schmidt Department the detection and classification of buried objects using low frequency, subcritical sonar an interesting the range coverage of such a sonar to be limited to about twice the ocean depth. With subcritical

Schmidt, Henrik

376

Engineering Task Plan for the Ultrasonic Inspection of Hanford Double-Shell Tanks - FY 2001  

SciTech Connect

This document facilitates the ultrasonic examination of Hanford double-shell tanks. Included are a plan for engineering activities, plan for performance demonstration testing, and a plan for field activities. Also included are a Statement of Work for contractor performance and a protocol to be followed should tank flaws that exceed the acceptance criteria are found.

JENSEN, C.E.

2000-10-12T23:59:59.000Z

377

Hybrid Core-Shell Nanowire Forests as Self-Selective Chemical Connectors  

E-Print Network (OSTI)

Hybrid Core-Shell Nanowire Forests as Self-Selective Chemical Connectors Hyunhyub Ko,,,§,| Jongho are presented that limit their successful operation. Here, we report unisex, chemical connectors based on hybridW bonding interactions of hybrid inorganic/organic NW forests. The weak vdW bond strengths result in the low

Javey, Ali

378

Observation of inner-shell-excited configurations in triply ionized cerium Ce{sup 3+}  

SciTech Connect

We report wavelength measurements and energy levels for the three-times ionized cerium atom Ce{sup 3+}. The spectrum is that of a simple one-electron atom overlaid with a more complex three-electron spectrum originating from the excitation of an electron in the inner closed shell to the valence shell. The data provide energy levels for the inner-shell-excited configurations 5p{sup 5}4f5d and 5p{sup 5}4f6s and solve a long-standing puzzle regarding the fine structure of the 5p{sup 6}6d configuration, which is known to be anomalously large and inverted. The data show that this anomalous fine structure is the result of interaction between 5p{sup 6}6d and the inner-shell-excited configuration 5p{sup 5}4f5d. The results are supported by Hartree-Fock calculations and least-squares fits of the energy parameters to the observed levels. From our observed 5p{sup 6}6g configuration, we determine the ionization energy as 297670{+-}70 cm{sup -1} (36.906{+-}0.009 eV)

Reader, Joseph; Wyart, Jean-Francois [National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States); Laboratoire Aime Cotton, CNRS, Universite Paris-Sud, Batiment 505, 91405 Orsay Cedex (France)

2009-10-15T23:59:59.000Z

379

Soft and hard shells in metallic nanocrystals D. Y. Sun,1,2  

E-Print Network (OSTI)

Soft and hard shells in metallic nanocrystals D. Y. Sun,1,2 X. G. Gong,1,2 and Xiao-Qian Wang2 1 such as the enhanced specific heat and low Debye temperature for nanocrystals, studies on the vi- brational properties. In order to pursue the spatial distribution of the elastic and vibrational properties, we divide

Gong, Xingao

380

Tropical sea snail shells: Possible exotic sources for ceramic biomaterial synthesis  

SciTech Connect

In this study, chemical and structural properties of sea snail shell based bioceramic materials (i.e. hydroxyapatite, whitlockite and other phases) are produced by using mechano-chemical (ultrasonic) conversion method. For this purpose, differential thermal and gravimetric analysis (DTA/TG), X-ray diffraction, infra-red (IR) and scanning electron microscope (SEM) studies are performed.

Oktar, F. N. [Bioengineering Dept., Faculty of Engineering, Marmara Univ., Istanbul, Turkey, and Medical Imaging Technics Dept., School of Health Related Professions, Marmara Univ., Istanbul, Turkey, and Nanotechnology and Biomaterials Research and Application Cen (Turkey); Kiyici, I. A. [Graduate School of Natural and Applied Sciences, Biomedical Engineering, Kocaeli University, Kocaeli (Turkey); Gökçe, H. [Metallurgical and Materials Engineering Dept., Istanbul Technical Univ., Istanbul, Turkey, and Prof. Dr. Adnan Tekin Material Sciences and Production Technologies Applied Research Center, Istanbul Technical Univ., Istanbul (Turkey); A?aogullar?, D.; Kayali, E. S. [Metallurgical and Materials Engineering Dept., Istanbul Technical Univ., Istanbul (Turkey)

2013-12-16T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" 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

Paleogene cooling (55-30 MA) as inferred from oxygen isotope variation within mollusc shells  

E-Print Network (OSTI)

by the sudden appearance of a major continental glacier on Antarctica. We examine this cooling trend by analyzing oxygen isotope variation within mollusc shells from the Gulf Coastal Plain of the southern U.S. Our records show a secular cooling trend of mean...

Kobashi, Takuro

2012-06-07T23:59:59.000Z

382

Shell And Statoil Plan To Use CO For Enhanced Offshore Oil Recovery  

Science Journals Connector (OSTI)

Shell and the Norwegian oil company Statoil have announced the world's first project to use carbon dioxide sequestered from a power plant to boost oil recovery offshore. In the $1.4 billion project, Statoil will build an 860-MW gas-fired power plant and ...

BETTE HILEMAN

2006-03-20T23:59:59.000Z

383

Exploring the Geometry of the Space of Shells , M. Rumpf1  

E-Print Network (OSTI)

the difference between a smiling (upper left) and a neutral face (lower left) along a path (bottom row) towards in the smooth and discrete setting that the Hessian of an elastic deformation energy results in a proper with prescribed initial data, and we give a construction for parallel transport in shell space. This enables

Griebel, Michael

384

Engineering report single-shell tank farms interim measures to limit infiltration through the vadose zone  

SciTech Connect

Identifies, evaluates and recommends interim measures for reducing or eliminating water sources and preferential pathways within the vadose zone of the single-shell tank farms. Features studied: surface water infiltration and leaking water lines that provide recharge moisture, and wells that could provide pathways for contaminant migration. An extensive data base, maps, recommended mitigations, and rough order of magnitude costs are included.

HAASS, C.C.

1999-10-14T23:59:59.000Z

385

The indentation of pressurized elastic shells: from polymeric capsules to yeast cells  

Science Journals Connector (OSTI)

...common to use an atomic force microscope (AFM) in...shell theory. From a fundamental point of view, the indentation...action of a point-like force, F. Numerical simulations...A. Kwade 2010 Atomic force microscopy studies on...and I. A. Stegun 1964 Handbook of mathematical functions...

2012-01-01T23:59:59.000Z

386

Product Refrigerator Freezer Fresh, in shell 4 to 5 weeks Don't freeze  

E-Print Network (OSTI)

Product Refrigerator Freezer Eggs Fresh, in shell 4 to 5 weeks Don't freeze Raw yolks, whites 2 recommended storage times are for quality only. Refrigerator & Freezer Storage Chart Product Refrigerator, opened 3 days Don't freeze unopened 10 days 1 year Mayonnaise, commercial Refrigerate after opening 2

Burke, Peter

387

Scroll waves in spherical shell geometries Francisco Chavez and Raymond Kapral  

E-Print Network (OSTI)

Scroll waves in spherical shell geometries Francisco Cha´vez and Raymond Kapral Chemical Physics Received 25 April 2001; accepted 21 July 2001; published 4 October 2001 The evolution of scroll waves. The motion of scroll wave filaments that are the locii of phaseless points in the medium and organize

Glass, Leon

388

Fracture response of externally flawed aluminum cylindrical shells under internal gaseous detonation loading  

E-Print Network (OSTI)

Fracture response of externally flawed aluminum cylindrical shells under internal gaseous. Experiments were performed to observe the fracture behavior of thin- wall and initially-flawed aluminum tubes to different fracture events are analyzed. Keywords: tube fracture, detonation, crack branching, crack curving

Barr, Al

389

Alkanethiol-Induced Structural Rearrangements in Silica-Gold Core-Shell-type Nanoparticle Clusters: An  

E-Print Network (OSTI)

Alkanethiol-Induced Structural Rearrangements in Silica-Gold Core-Shell-type Nanoparticle Clusters 21, 2003. In Final Form: April 19, 2004 Electrostatically bonded SiO2,Au nanoparticle clusters form by reaction of 3-aminopropylsilane-modified SiO2 spheres (470 nm) with citrate-coated gold nanoparticles (9

Guo, Ting

390

Resonant carrier scattering by core-shell nanoparticles for thermoelectric power factor enhancement  

E-Print Network (OSTI)

to the formation of quasi-bound states inside the nanoparticles, which strongly scatter carriers near these energy on various nanostructured materials for ther- moelectric energy conversion.6,7 The ErAs nanoparticles emResonant carrier scattering by core-shell nanoparticles for thermoelectric power factor enhancement

391

Geology Data Package for the Single-Shell Tank Waste Management Areas at the Hanford Site  

SciTech Connect

This data package discusses the geology of the single-shell tank (SST) farms and the geologic history of the area. The focus of this report is to provide the most recent geologic information available for the SST farms. This report builds upon previous reports on the tank farm geology and Integrated Disposal Facility geology with information available after those reports were published.

Reidel, Steve P.; Chamness, Mickie A.

2007-01-01T23:59:59.000Z

392

Radiation by Moving Shells in Curved Two-Dimensional Space-Time  

Science Journals Connector (OSTI)

......by the shell, which is then compared to that by a moving mirror. It also leads to a physically lucid expression for the stress...pp. 1126-1139 Quantum Field Theory in Two-Dimensional Schwarzschild-de Sitter Spacetime. II Shin-ichi Tadaki and Shin Takagi......

Kousuke Shizume; Shin Takagi

1988-03-01T23:59:59.000Z

393

Initial cone-in-shell fast-ignition experiments on OMEGAa) W. Theobald,1,b)  

E-Print Network (OSTI)

-intense, high-energy laser pulse. Fast ignition relies on the localized deposition of the particle energyInitial cone-in-shell fast-ignition experiments on OMEGAa) W. Theobald,1,b) A. A. Solodov,1 C. Sinenian,3 T. Ma,6,7 F. N. Beg,7 E. Giraldez,8 and R. B. Stephens8 1 Laboratory for Laser Energetics

394

Gas retention and release behavior in Hanford single-shell waste tanks  

SciTech Connect

This report describes the current understanding of flammable gas retention and release in Hanford single-shell waste tanks based on theory, experimental results, and observations of tank behavior. The single-shell tanks likely to pose a flammable gas hazard are listed and described, and photographs of core extrusions and the waste surface are included. The credible mechanisms for significant flammable gas releases are described, and release volumes and rates are quantified as much as possible. The only mechanism demonstrably capable of producing large ({approximately}100 m{sup 3}) spontaneous gas releases is the buoyant displacement, which occurs only in tanks with a relatively deep layer of supernatant liquid. Only the double-shell tanks currently satisfy this condition. All release mechanisms believed plausible in single-shell tanks have been investigated, and none have the potential for large spontaneous gas releases. Only small spontaneous gas releases of several cubic meters are likely by these mechanisms. The reasons several other postulated gas release mechanisms are implausible or incredible are also given.

Stewart, C.W.; Brewster, M.E.; Gauglitz, P.A.; Mahoney, L.A.; Meyer, P.A.; Recknagle, K.P.; Reid, H.C.

1996-12-01T23:59:59.000Z

395

Lidocaine hydrochloride—sodium bicarbonate as an anesthetic for soft-shelled turtle Pelodiscus sinensis  

Science Journals Connector (OSTI)

Attempts were made to understand how the different sizes (mean body weight of 4.1±0.8 g for small and 182.6±23.7 g for large) of the soft-shelled turtle Pelodiscus sinensis...are affected by different temperature...

In-Seok Park; Sung Hwoan Cho; Jun Wook Hur; Gyeng-Cheol Choi…

2006-01-01T23:59:59.000Z

396

MICROSCALE THREE-DIMENSIONAL HEMISPHERICAL SHELL RESONATORS FABRICATED FROM METALLIC GLASS  

E-Print Network (OSTI)

MICROSCALE THREE-DIMENSIONAL HEMISPHERICAL SHELL RESONATORS FABRICATED FROM METALLIC GLASS M. Kanik.S. Abstract-- A novel use of bulk metallic glasses in microresonator applications is reported and a method scale glass blowmolding using quartz [2] and Pyrex [3], as well as the isotropic etching of silicon

M'Closkey, Robert T.

397

Inner-shell excitation of gas phase carbonates and a,c-dicarbonyl compounds  

E-Print Network (OSTI)

correlation of the C 1s ! p� C@O transition energy and the relative oxidation at the carbonyl car- bon and dimethyldicarbonate ­ have been recorded in the gas phase with inner shell electron energy loss spectroscopy in the scattering regime dominated by electric dipole transitions. All spectra are presented on absolute oscillator

Hitchcock, Adam P.

398

The nested SU(N) off-shell Bethe ansatz and exact form factors  

E-Print Network (OSTI)

The form factor equations are solved for an SU(N) invariant S-matrix under the assumption that the anti-particle is identified with the bound state of N-1 particles. The solution is obtained explicitly in terms of the nested off-shell Bethe ansatz where the contribution from each level is written in terms of multiple contour integrals.

Hratchia M. Babujian; Angela Foerster; Michael Karowski

2006-11-01T23:59:59.000Z

399

Core-shell silicon nanowire solar cells M. M. Adachi1,2  

E-Print Network (OSTI)

Core-shell silicon nanowire solar cells M. M. Adachi1,2 , M. P. Anantram3 & K. S. Karim1,2 1 of Waterloo, Waterloo, Ontario N2L 3G1, Canada, 3 Department of Electrical Engineering, University and reduce radial carrier collection distances in solar cell devices. Arrays of disordered nanowires grown

Anantram, M. P.

400

Experimental shellside flow visualization in a shell and tube heat exchanger  

E-Print Network (OSTI)

information in the shellside flow. A scale-model shell and tube heat exchanger with an outer diameter of 30.5 cm and a length of 61 cm was designed and constructed out of acrylic. Water was utilized as the working fluid and flowrates ranging from 0.32 to 2...

Fischer, Matthew Winslow

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" 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

Spectroscopic Investigation of p-Shell Lambda Hypernuclei by the (e,e'K+) Reaction  

SciTech Connect

Hypernuclear spectroscopy is a powerful tool to investigate Lambda-N interaction. Compared with other Lambda hypernuclei productions, electroproduction via the (e,e'K+) reaction has the advantage of exciting states deeply inside of the hypernucleus and achieving sub-MeV energy resolution. The E05-115 experiment, which was successfully performed in 2009, is the third generation hypernuclear experiment in JLab Hall C. A new splitter magnet and electron spectrometer were installed, and beam energy of 2.344 GeV was selected in this experiment. These new features gave better field uniformity, optics quality and made the ?tilt method? more effective in improving yield-to-background ratio. The magnetic optics of the spectrometers were carefully studied with GEANT simulation, and corrections were applied to compensate for the fringe field cross talk between the compact spectrometer magnets. The non-linear least chi-squared method was used to further calibrate the spectrometer with the events from Lambda, Sigma0 and B12Lambda and uniform magnetic optics as well as precise kinematics were achieved. Several p-shell Lambda hypernuclear spectra, including B12Lambda, Be10Lambda, He7Lambda, were obtained with high energy resolution and good accuracy. For B12Lambda, eight peaks were recognized with the resolution of ~540keV (FWHM), and the ground state binding energy was obtained as 11.529 ± 0.012(stat.) ± 0.110(syst.) MeV. Be10Lambda, twelve peaks were recognized with the resolution of ~520keV (FWHM), and the binding energy of the ground state was determined as 8.710 ± 0.059(stat.) ± 0.114(syst.) MeV. For He7Lambda, three peaks were recognized with the resolution of ~730keV, and the ground state binding energy was obtained as 5.510 ± 0.050(stat.) ± 0.120(syst.) MeV. Compared with the published data of B12Lambda from the JLab Hall A experiment, four extra peaks were fitted and interpreted thanks to the highest ever energy resolution and sufficient statistics. The determined binding energy of Be10Lambda provides new information on charge symmetry breaking effect in the Lambda-N interaction. Compared with the results of He7Lambda from the E01-011 experiment, the ground state position is consistent with 4 times more statistics, and two extra peaks corresponding to excited states were recognized.

Chen, Chunhua [Hampton University

2014-08-01T23:59:59.000Z

402

Marketability of omega-3 fatty acid enriched shell eggs  

E-Print Network (OSTI)

on oxidative stability and flavor of enriched eggs, eggs were collected weekly (week 0, 1, 2, 3, 4) for each of 3 replicates/diet, and all weeks analyzed within 24 hours of the week 0 collection. Effect of storage on flavor of eggs (weeks 0, 2, 4...

Marshall, Autumn Chester

1994-01-01T23:59:59.000Z

403

Binding Effects in High-Energy Scattering Applied to K-Shell Ionization  

E-Print Network (OSTI)

~ ~ ~ ~ ~ 0 ~ ~ ~ ~ ~ ~ ~ ~ I.O 9 . 8- ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 7- 7- I I 8 l2 Mev/amu l6 20 I I I I I I 8 l2 I6 20 24 28 32 36 Mev/amu FIG. 1. Theoretical results for ~-particle and deuteron scattering...- ~&I.OO 0 .95- 90 .85- ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ I I I I I I I I I 4 8 l2 l6 20 24 28 32 36 MeV/amu FIG. 2. Same as for Fig. 1, but for chlorine. The experimental points are taken from Hef. 4. 4 8 I2 l6 20 24 28...

Binstock, J.; Reading, John F.

1975-01-01T23:59:59.000Z

404

Effects of localized geometric imperfections on the stress behavior of pressurized cylindrical shells  

E-Print Network (OSTI)

relative to an otherwise similar short dent. It is important to point out that during the dent formation and rerounding process residual stresses develop in the dent region. It will be shown later in this 14 Fig. 4. Post?rerounding residual hoop stress... relative to an otherwise similar short dent. It is important to point out that during the dent formation and rerounding process residual stresses develop in the dent region. It will be shown later in this 14 Fig. 4. Post?rerounding residual hoop stress...

Rinehart, Adam James

2004-09-30T23:59:59.000Z

405

A computer procedure for evaluating the effects of loading thin isotropic shells of revolution  

E-Print Network (OSTI)

geometry. riis method is used. in th? soluticn of the pro'blem. The computer used for thc program checxout and the test runs was the 1Bld 70P4 at the Texas AQN University Data Processing Center. Plot- ting wss done on CALCOii2 digit 1 plotter...-I (J). = 2C(ds)(Z. I - 2 ~I) (K). = 2(e + 1)(ds)ripn (ri+I i-I I + 2(ds)r. (r. (p - p ) + p (r. + - r. )] r ni+I ni-I ni 1+I 1 I (rgp (ds) + 2(ds)e((Z ~I - & 1)(r p )) 10 Solution of Bquations 1'quations of the form used in equations (14) and (15...

Petersen, Gary Stanley

2012-06-07T23:59:59.000Z

406

Effects of oil treating on shell egg quality during short-term storage  

E-Print Network (OSTI)

of Texas A, 8 c N, College for cooperating in the study and. providing the refrigerated storage fac111ti es. Nr. Fred. Gardner for providing valuable assistance in labora- tory techniques and. presentation of the data. Nr. John W1111am for aiding... test followsa Test ~HH U 't 1 . . . . . . . . . . . . 82. e 2 . . . . . . . . . . . . 81. C 3 . . . . . . . . . . . . 81. 6 5 . . . . . , . . . , . . 78. 5 6 . . . . . , . . . . . . 8O. 5 average . oaoo o ta o 81HO There wa. , no sigrificant d...

Schwall, Donald Vincent

1960-01-01T23:59:59.000Z

407

Effect of nucleus accumbens shell infusions of ganaxolone or gaboxadol on ethanol consumption in mice  

Science Journals Connector (OSTI)

Allopregnanolone (ALLO) is an endogenous neuroactive steroid thought to alter the reinforcement value of alcohol (ethanol) due to its actions as a positive...A receptor (GABAAR). Extrasynaptic GABAARs may be a pa...

Marcia J. Ramaker; Moriah N. Strong-Kaufman; Matthew M. Ford…

2014-10-01T23:59:59.000Z

408

Geometrical Effects of Baryon Density Inhomogeneities on Primordial Nucleosynthesis  

E-Print Network (OSTI)

We discuss effects of fluctuation geometry on primordial nucleosynthesis. For the first time we consider condensed cylinder and cylindrical-shell fluctuation geometries in addition to condensed spheres and spherical shells. We find that a cylindrical shell geometry allows for an appreciably higher baryonic contribution to be the closure density ($\\Omega_b h_{50}^2 \\la 0.2$) than that allowed in spherical inhomogeneous or standard homogeneous big bang models. This result, which is contrary to some other recent studies, is due to both geometry and recently revised estimates of the uncertainties in the observationally inferred primordial light-element abundances. We also find that inhomogeneous primordial nucleosynthesis in the cylindrical shell geometry can lead to significant Be and B production. In particular, a primordial beryllium abundance as high as [Be] = 12 + log(Be/H) $\\approx -3$ is possible while still satisfying all of the light-element abundance constraints.

M. Orito; T. Kajino; R N. Boyd; G J. Mathews

1996-09-19T23:59:59.000Z

409

Graded index and randomly oriented core-shell silicon nanowires with broadband and wide angle antireflection for photovoltaic cell applications  

E-Print Network (OSTI)

Antireflection with broadband and wide angle properties is important for a wide range of applications on photovoltaic cells and display. The SiOx shell layer provides a natural antireflection from air to the Si core absorption layer. In this work, we have demonstrated the random core-shell silicon nanowires with both broadband (from 400nm to 900nm) and wide angle (from normal incidence to 60\\degree) antireflection characteristics within AM1.5 solar spectrum. The graded index structure from the randomly oriented core-shell (Air/SiOx/Si) nanowires may provide a potential avenue to realize a broadband and wide angle antireflection layer.

Pignalosa, P; Qiao, L; Tseng, M; Yi, Yasha

2011-01-01T23:59:59.000Z

410

Traces on ion yields and electron spectra of Ar inner-shell hollow states with Free-Electron Lasers  

E-Print Network (OSTI)

We explore the formation by Free-Electron-Laser radiation of Ar hollow states with two or three inner-shell holes. We find that even charged Ar ion states can be more populated than odd charged Ar ion states. This depends on the pulse intensity and the number of energetically accessible inner- shell holes. Fully accounting for fine structure, we demonstrate that one electron spectra bare the imprints of Ar hollow states with two inner-shell holes. Moreover, we show how the Auger spectra of these hollow states can be extracted from two-electron coincidence spectra.

Wallis, A O G; Emmanouilidou, A

2015-01-01T23:59:59.000Z

411

Questions and Answers - Why do the electron shells begin being named with  

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

the elementsget their symbols? the elements<br>get their symbols? Previous Question (How do the elements get their symbols?) Questions and Answers Main Index Next Question (Was "beauty" a quark name they used in the past?) Was "beauty" a quark namethey used in the past? Why do the electron shells begin being named with K, L, M, N, and not with A, B, C? The names of the electron shells come from a fellow named Charles G. Barkla, a spectroscopist who studied the X-rays that are emitted by atoms when they are hit with high energy electrons. He noticed that atoms appeared to emit two types of X-rays. The two types of X-rays differed in energy and Barkla originally called the higher energy X-ray type A and the lower energy X-ray type B. He later renamed these two types K and L since

412

Stability of Thin-Shell Wormholes from Noncommutative BTZ Black Hole  

E-Print Network (OSTI)

In this paper, we construct thin-shell wormholes in (2+1)-dimensions from noncommutative BTZ black hole by applying the cut-and-paste procedure implemented by Visser. We calculate the surface stresses localized at the wormhole throat by using the Darmois-Israel formalism, and we ?nd that the wormholes are supported by matter violating the energy conditions. In order to explore the dynamical analysis of the wormhole throat, we consider that the matter at the shell is supported by dark energy equation of state P = w\\rho with w < 0. The stability analysis is carried out of these wormholes to linearized spherically symmetric perturbations around static solutions. Preserving the symmetry we also consider the linearized radial perturbation around static solution to investigate the stability of wormholes which explored by the parameter \\beta (speed of sound).

Bhar, Piyali

2015-01-01T23:59:59.000Z

413

Examination of Simulated Non-Compliant Waste from Hanford Single-Shell Tanks  

SciTech Connect

This report summarizes the electrochemical testing results for the aggressive layers testing recommended by the single-shell tank integrity expert panel. From single-shell chemistry data, 39 layers were identified as possible aggressive waste layers and were grouped by aggressive ion and inhibitor ions. From those groups 18 segments were identified as representative segments and tested. The testing reported here showed pitting corrosion for six aggressive layers, and one layer showed a propensity for crevice corrosion. In these cases there was a lack of inhibitors, an abundance of aggressive ions, or both. A good prediction for pitting corrosion could be made by considering the pH value of the layer. When the pH was less than 12, there was a high probability for pitting to occur. However, the pH of the solution was not always an indicator, and the inhibitor ion and aggressive ion concentrations then needed to be considered.

Wyrwas, Richard; Page, J. S.; Venetz, T. J.; Cooke, G. A.

2014-07-10T23:59:59.000Z

414

OGLE-2013-SN-079: a lonely supernova consistent with a helium shell detonation  

E-Print Network (OSTI)

We present observational data for a peculiar supernova discovered by the OGLE-IV survey and followed by the Public ESO Spectroscopic Survey for Transient Objects. The inferred redshift of z=0.07 implies an absolute magnitude in the rest-frame I-band of M$_{I}\\sim-17.6$ mag. This places it in the luminosity range between normal Type Ia SNe and novae. Optical and near infrared spectroscopy reveal mostly Ti and Ca lines, and an unusually red color arising from strong depression of flux at rest wavelengths detonation of a helium shell around a low-mass CO white dwarf and "double-detonation" models that include a secondary detonation of a CO core following a primary detonation in an overlying helium shell.

Inserra, C; Wyrzykowski, L; Smartt, S J; Fraser, M; Nicholl, M; Shen, K J; Jerkstrand, A; Gal-Yam, A; Howell, D A; Maguire, K; Mazzali, P; Valenti, S; Taubenberger, S; Benitez-Herrera, S; Bersier, D; Blagorodnova, N; Campbell, H; Chen, T -W; Elias-Rosa, N; Hillebrandt, W; Kostrzewa-Rutkowska, Z; Kozlowski, S; Kromer, M; Lyman, J D; Polshaw, J; Ropke, F K; Ruiter, A J; Smith, K; Spiro, S; Sullivan, M; Yaron, O; Young, D; Yuan, F

2014-01-01T23:59:59.000Z

415

Dynamo Onset as a First-Order Transition: Lessons from a Shell Model for Magnetohydrodynamics  

E-Print Network (OSTI)

We carry out systematic and high-resolution studies of dynamo action in a shell model for magnetohydrodynamic (MHD) turbulence over wide ranges of the magnetic Prandtl number $Pr_{\\rm M}$ and the magnetic Reynolds number $Re_{\\rm M}$. Our study suggests that it is natural to think of dynamo onset as a nonequilibrium, first-order phase transition between two different turbulent, but statistically steady, states. The ratio of the magnetic and kinetic energies is a convenient order parameter for this transition. By using this order parameter, we obtain the stability diagram (or nonequilibrium phase diagram) for dynamo formation in our MHD shell model in the $(Pr^{-1}_{\\rm M}, Re_{\\rm M})$ plane. The dynamo boundary, which separates dynamo and no-dynamo regions, appears to have a fractal character. We obtain hysteretic behavior of the order parameter across this boundary and suggestions of nucleation-type phenomena.

Ganapati Sahoo; Dhrubaditya Mitra; Rahul Pandit

2009-11-23T23:59:59.000Z

416

Dynamo Onset as a First-Order Transition: Lessons from a Shell Model for Magnetohydrodynamics  

E-Print Network (OSTI)

We carry out systematic and high-resolution studies of dynamo action in a shell model for magnetohydrodynamic (MHD) turbulence over wide ranges of the magnetic Prandtl number $Pr_{\\rm M}$ and the magnetic Reynolds number $Re_{\\rm M}$. Our study suggests that it is natural to think of dynamo onset as a nonequilibrium, first-order phase transition between two different turbulent, but statistically steady, states. The ratio of the magnetic and kinetic energies is a convenient order parameter for this transition. By using this order parameter, we obtain the stability diagram (or nonequilibrium phase diagram) for dynamo formation in our MHD shell model in the $(Pr^{-1}_{\\rm M}, Re_{\\rm M})$ plane. The dynamo boundary, which separates dynamo and no-dynamo regions, appears to have a fractal character. We obtain hysteretic behavior of the order parameter across this boundary and suggestions of nucleation-type phenomena.

Sahoo, Ganapati; Pandit, Rahul

2009-01-01T23:59:59.000Z

417

Coulomb Excitation of Sn104 and the Strength of the Sn100 Shell Closure  

Science Journals Connector (OSTI)

A measurement of the reduced transition probability for the excitation of the ground state to the first 2+ state in Sn104 has been performed using relativistic Coulomb excitation at GSI. Sn104 is the lightest isotope in the Sn chain for which this quantity has been measured. The result is a key point in the discussion of the evolution of nuclear structure in the proximity of the doubly magic nucleus Sn100. The value B(E2;0+?2+)=0.10(4) e2b2 is significantly lower than earlier results for Sn106 and heavier isotopes. The result is well reproduced by shell model predictions and therefore indicates a robust N=Z=50 shell closure.

G. Guastalla et al.

2013-04-23T23:59:59.000Z

418

Nonlinear control problems and their approximations for thin dynamic shallow shells in aerospace  

SciTech Connect

A nonlinear system describing the vibrations of a thin shallow shell win be considered. These equations arise in the modeling of large flexible structures such as solar collectors and reflective mirrors. This paper will address questions related to well-posedness: existence, uniqueness and regularity of solutions. However, the main goals of the paper are (i) to examine the asymptotic behavior of solutions subject to a suitable dissipative mechanism applied to the model, and (ii) to provide a framework for numerical approximations of stabilizing solutions. Of particular interest are problems associated with dissipation acting on the boundary of the shell. The paper will detail conditions under which uniform decay of the energy function can be achieved. This is related to avoiding everted states, a phenomenon involving the ratio of thickness to curvature for which there is no analogue in plate theory.

Marchand, R.J.; Lasiecka, I. [Univ. of Virginia, Charlottesville, VA (United States)

1994-12-31T23:59:59.000Z

419

Lattice-Strain Control of the Activity in Dealloyed Core-Shell Fuel Cell Catalysts  

SciTech Connect

Electrocatalysis will play a key role in future energy conversion and storage technologies, such as water electrolysers, fuel cells and metal–air batteries. Molecular interactions between chemical reactants and the catalytic surface control the activity and efficiency, and hence need to be optimized; however, generalized experimental strategies to do so are scarce. Here we show how lattice strain can be used experimentally to tune the catalytic activity of dealloyed bimetallic nanoparticles for the oxygen-reduction reaction, a key barrier to the application of fuel cells and metal–air batteries. We demonstrate the core–shell structure of the catalyst and clarify the mechanistic origin of its activity. The platinum-rich shell exhibits compressive strain, which results in a shift of the electronic band structure of platinum and weakening chemisorption of oxygenated species. We combine synthesis, measurements and an understanding of strain from theory to generate a reactivity–strain relationship that provides guidelines for tuning electrocatalytic activity.

Strasser, Peter; Shirlaine, Koh; Anniyev, Toyli; Greeley, Jeffrey P.; More, Karren L.; Yu, Chengfei; Liu, Zengcai; Kaya, Sarp; Nordlund, Dennis; Ogasawara, Hirohito; Toney, Michael F.; Nilsson, Anders R.

2010-04-30T23:59:59.000Z

420

Lattice-Strain Control of the Activity in Dealloyed Core-Shell Fuel Cell Catalysts  

SciTech Connect

Electrocatalysis will play a key role in future energy conversion and storage technologies, such as water electrolysers, fuel cells and metal-air batteries. Molecular interactions between chemical reactants and the catalytic surface control the activity and efficiency, and hence need to be optimized; however, generalized experimental strategies to do so are scarce. Here we show how lattice strain can be used experimentally to tune the catalytic activity of dealloyed bimetallic nanoparticles for the oxygen-reduction reaction, a key barrier to the application of fuel cells and metal-air batteries. We demonstrate the core-shell structure of the catalyst and clarify the mechanistic origin of its activity. The platinum-rich shell exhibits compressive strain, which results in a shift of the electronic band structure of platinum and weakening chemisorption of oxygenated species. We combine synthesis, measurements and an understanding of strain from theory to generate a reactivity-strain relationship that provides guidelines for tuning electrocatalytic activity.

Strasser, P. [Berlin Institute of Technology (Technische Universitat Berlin); Koh, Shirlaine [University of Houston, Houston; Anniyev, Toyli [SLAC National Accelerator Laboratory; Greeley, Jeff [Argonne National Laboratory (ANL); More, Karren Leslie [ORNL; Yu, Chengfei [University of Houston, Houston; Liu, Zengcai [University of Houston, Houston; Kaya, Sarpa [SLAC National Accelerator Laboratory; Nordlund, Dennis [SLAC National Accelerator Laboratory; Ogasawara, Hirohito [SLAC National Accelerator Laboratory; Toney, Michael F. [SLAC National Accelerator Laboratory; Anders, Nilsson [SLAC National Accelerator Laboratory

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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to obtain the most current and comprehensive results.


421

K-shell photoionization of Be-like carbon ions: experiment andtheory for C2+  

SciTech Connect

Absolute cross-section measurements for K-shell photoionization of Be-like C2+ ions have been performed in the photon energy range 292 325 eV. These measurements have been made using the photon ion merged-beam endstation at the Advanced Light Source, Lawrence Berkeley National Laboratory. Absolute measurements compared with theoretical results from the R-matrix method indicate that the primary C2+ ion beam consisted of 62 percent ground-state (1s22s2 1S) and 38 percent metastable state (1s22s2p 3Po) ions. Reasonable agreement is seen between theory and experiment for absolute photoionization cross sections, resonance energies and autoionization line widths of K-shell-vacancy Auger states.

Scully, S.W.J.; Aguilar, A.; Emmons, E.D.; Phaneuf, R.A.; Halka,M.; Leitner, D.; Levin, J.C.; Lubell, M.S.; Puettner, R.; Schlachter,A.S.; Covington, A.M.; Schippers, S.; Muller, A.; McLaughlin, B.M.

2005-06-21T23:59:59.000Z

422

The plume model MODIS: integration in the Hydro-Quebec shell  

Science Journals Connector (OSTI)

The comprehensive numerical model MODIS for the simulation of pollutant dispersion from a point source is integrated in the graphical shell of Hydro-Quebec. The shell has been developed by Hydro-Quebec to offer a valuable scheme for various applications of software products, which were originally conceived only for scientific purposes. MODIS, developed by the GKSS Research Centre Geesthacht and the Ontario Ministry of Environment, is a powerful simulation model, which calculates the behaviour of plumes in the lower atmosphere. The model was validated under a bilateral project in the framework of Canadian-German co-operation by using data of the EPRI Plume Model Validation Project. A further application of MODIS has been undertaken to determine the dispersion of gaseous mercury from a previous strong emission source located in the former German Democratic Republic.

O. Krueger; D.P. Eppel; S. Levesque; G. Lefebvre

1995-01-01T23:59:59.000Z

423

Evaluation of Hanford Single-Shell Waste Tanks Suspected of Water Intrusion  

SciTech Connect

Intrusions evaluations for twelve single-shell tanks were completed in 2013. The evaluations consisted of remote visual inspections, data analysis, and calculations of estimated intrusion rates. The observation of an intrusion or the preponderance of evidence confirmed that six of the twelve tanks evaluated had intrusions. These tanks were tanks 241-A-103, BX-101, BX-103, BX-110, BY-102, and SX-106.

Feero, Amie J. [Washington River Protection Systems, Richland, WA (United States); Washenfelder, Dennis J. [Washington River Protection Systems, Richland, WA (United States); Johnson, Jeremy M. [USDOE Office of River Protection, Richland, WA (United States); Schofield, John S. [Washington River Protection Systems, Richland, WA (United States)

2013-11-14T23:59:59.000Z

424

Energy expressions for n=3 and 4 systems in a single-j shell  

Science Journals Connector (OSTI)

For systems with three and four fermions within a single-j shell, analytical expressions for the state energies are presented from a decomposition of the angular momentum. In some important cases the expressions acquire a very simple form. The expression may help us in understanding the structure of isomeric states. The decomposition also makes it possible to construct the algebraic condition for conservation of seniority.

Chong Qi

2010-03-30T23:59:59.000Z

425

Shell model estimate of electric dipole moment in medium and heavy nuclei  

SciTech Connect

The nuclear electric dipole moment (EDM) and the nuclear Schiff moment for the lowest 1/2{sup +} state of {sup 129}Xe are investigated in terms of the nuclear shell model. We estimate the upper limit for the EDM of neutral {sup 129}Xe atom using the Schiff moment. We also estimate the upper limit of the nuclear EDM, which may be directly measured through ionic atoms.

Yoshinaga, Naotaka [Department of Physics, Saitama University, Saitama City 338-8570 (Japan); Higashiyama, Koji [Department of Physics, Chiba Institute of Technology, Narashino, Chiba 275-0023 (Japan)

2011-05-06T23:59:59.000Z

426

Nanoreactors comprising a nanoreactor shell enveloping a space, and method of making  

DOE Patents (OSTI)

Described herein are nanoreactors having various shapes that can be produced by a simple chemical process. The nanoreactors described herein may have a shell as thin as 0.5 nm and outside diameters that can be controlled by the process of making and have a nanoparticle enclosed therein. The nanoreactors have catalytic activity and may be used to catalyze a variety of chemical reactions.

Alivisatos, A. Paul (Oakland, CA); Yin, Yadong (Moreno Valley, CA); Rioux, Robert M. (Somerville, MA); Somorjai, Gabor A. (Berkeley, CA)

2011-01-25T23:59:59.000Z

427

The Nested Off-shell Bethe ansatz and O(N) Matrix Difference Equations  

E-Print Network (OSTI)

A system of O(N)-matrix difference equations is solved by means of the off-shell version of the nested algebraic Bethe ansatz. In the nesting process a new object, the $\\Pi$-matrix, is introduced to overcome the complexities of the O(N) group structure. The proof of the main theorem is presented in detail. In particular, the cancellation of all unwanted terms is shown explicitly. The highest weight property of the solutions is proved.

H. Babujian; A. Foerster; M. Karowski

2012-04-16T23:59:59.000Z

428

Quality and Sensory Attributes of Shell Eggs Sanitized with a Combination of Hydrogen Peroxide and Ultraviolet Light  

E-Print Network (OSTI)

Two experiments were conducted to evaluate the combination of hydrogen peroxide (H2O2) and ultraviolet light (UV) as an alternative eggshell sanitization procedure for shell egg processing. In each experiment, two cases of eggs (720 total) were...

Woodring, Kristy Senise

2011-10-21T23:59:59.000Z

429

Composition and structure of the shells of fly ash cenospheres from the combustion of coal of the Kuznetsk Basin  

Science Journals Connector (OSTI)

The chemical and phase composition and the structure of the shells of the narrow fractions of nonmagnetic and magnetic unperforated cenospheres in fly ash from the combustion of coal of the Kuznetsk Basin were...

E. V. Fomenko; N. N. Anshits; L. A. Solov’ev; O. A. Mikhailova…

2014-03-01T23:59:59.000Z

430

Shell-Structure and Pairing Interaction in Superheavy Nuclei: Rotational Properties of the Z=104 Nucleus Rf256  

Science Journals Connector (OSTI)

The rotational band structure of the Z=104 nucleus Rf256 has been observed up to a tentative spin of 20? using state-of-the-art ?-ray spectroscopic techniques. This represents the first such measurement in a superheavy nucleus whose stability is entirely derived from the shell-correction energy. The observed rotational properties are compared to those of neighboring nuclei and it is shown that the kinematic and dynamic moments of inertia are sensitive to the underlying single-particle shell structure and the specific location of high-j orbitals. The moments of inertia therefore provide a sensitive test of shell structure and pairing in superheavy nuclei which is essential to ensure the validity of contemporary nuclear models in this mass region. The data obtained show that there is no deformed shell gap at Z=104, which is predicted in a number of current self-consistent mean-field models.

P. T. Greenlees et al.

2012-07-03T23:59:59.000Z

431

Msx genes are expressed in the carapacial ridge of turtle shell: a study of the European pond turtle, Emys orbicularis  

Science Journals Connector (OSTI)

The turtle shell forms by extensive ossification of dermis... Msx genes are involved in the development of limb mesenchyme and of various skeletal structures. In particular, precocious Msx expression is recorded ...

Christine Vincent; Martine Bontoux; Nicole M. Le Douarin…

2003-09-01T23:59:59.000Z

432

Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment  

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

Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment Print Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment Print A threshold law describes the dependence of a reaction yield near a reaction threshold. It is also a signature of the physical forces involved in the reaction, so the agreement of an observed threshold behavior with a threshold law or a departure from it can be a sensitive probe into how well the reaction physics is understood. A collaboration from Western Michigan University, the ALS, and Denison University has now shown that the threshold laws for inner-shell photodetachment of negative ions are not only obeyed but can extend over a much wider energy range than theory had predicted. Crossing a Threshold In physics and chemistry, a threshold refers to the minimum energy required for a reaction to just become observable. A threshold law mathematically describes the reaction yield as the energy varies near the threshold. For ionization of an atom, for example, the threshold is the minimum energy needed to eject an electron, and the threshold behavior of the ionization depends only on the Coulomb (electrical) attraction between the positively charged nucleus and negatively charged electron. When absorption of light causes removal (photodetachment) of an electron from a negatively charged ion (atom with one extra electron) the story changes because the negative electron is bound to a neutral atom.

433

Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment  

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

Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment Print Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment Print A threshold law describes the dependence of a reaction yield near a reaction threshold. It is also a signature of the physical forces involved in the reaction, so the agreement of an observed threshold behavior with a threshold law or a departure from it can be a sensitive probe into how well the reaction physics is understood. A collaboration from Western Michigan University, the ALS, and Denison University has now shown that the threshold laws for inner-shell photodetachment of negative ions are not only obeyed but can extend over a much wider energy range than theory had predicted. Crossing a Threshold In physics and chemistry, a threshold refers to the minimum energy required for a reaction to just become observable. A threshold law mathematically describes the reaction yield as the energy varies near the threshold. For ionization of an atom, for example, the threshold is the minimum energy needed to eject an electron, and the threshold behavior of the ionization depends only on the Coulomb (electrical) attraction between the positively charged nucleus and negatively charged electron. When absorption of light causes removal (photodetachment) of an electron from a negatively charged ion (atom with one extra electron) the story changes because the negative electron is bound to a neutral atom.

434

Decamethylytterbocene complexes of bipyridines and diazabutadines: multiconfigurational ground states and open-shell singlet formation  

SciTech Connect

Partial ytterbium f-orbital occupancy (i.e. intermediate valence) and open-shell singlet Draft 12/formation are established for a variety of bipyridine and diazabutadiene adducts to decamethylytterbocene, (C{sub 5}Me{sub 5}){sub 2}Yb or Cp*{sub 2}Yb. Data used to support this claim includes ytterbium valence measurements using Yb Lm-edge x-ray absorption near-edge structure (XANES) spectroscopy, magnetic susceptibility and Complete Active Space Self-Consistent Field (CASSCF) multi configurational calculations, as well as structural measurements compared to density-functional theory (DFT) calculations. The CASSCF calculations indicate that the intermediate valence is the result of a multiconfigurational ground state wave function that has both an open-shell singlet f{sup 13} and a closed-shell singlet f{sup 14} component. A number of other competing theories for the unusual magnetism in these materials are ruled out by the presence of intermediate valence and its lack of any significant temperature dependence. These results have implications for understanding chemical bonding not only in organolanthanide complexes, but also for organometallic chemistry in general, as well as understanding magnetic interactions in nanopartic1es and devices.

Bauer, Eric D [Los Alamos National Laboratory; Booth, C H [LBNL; Walter, M D [LBNL; Kazhdan, D [LBNL; Hu, Y - J [LBNL; Lukens, Wayne [LBNL; Maron, Laurent [INSA TOULOUSE; Eisentein, Odile [UNIV MONTPELLIER 2; Anderson, Richard [LBNL

2009-01-01T23:59:59.000Z

435

Decamethylytterbocene Complexes of Bipyridines and Diazabutadienes: Multiconfigurational Ground States and Open-Shell Singlet Formation  

SciTech Connect

Partial ytterbium f-orbital occupancy (i.e., intermediate valence) and open-shell singlet formation are established for a variety of bipyridine and diazabutadiene adducts with decamethylytterbocene, (C5Me5)2Yb, abbreviated as Cp*2Yb. Data used to support this claim include ytterbium valence measurements using Yb LIII-edge X-ray absorption near-edge structure spectroscopy, magnetic susceptibility, and complete active space self-consistent field (CASSCF) multiconfigurational calculations, as well as structural measurements compared to density functional theory calculations. The CASSCF calculations indicate that the intermediate valence is the result of a multiconfigurational ground-state wave function that has both an open-shell singlet f13(?*)1, where pi* is the lowest unoccupied molecular orbital of the bipyridine or dpiazabutadiene ligands, and a closed-shell singlet f14 component. A number of other competing theories for the unusual magnetism in these materials are ruled out by the lack of temperature dependence of the measured intermediate valence. These results have implications for understanding chemical bonding not only in organolanthanide complexes but also for f-element chemistry in general, as well as understanding magnetic interactions in nanoparticles and devices.

Booth, Corwin H.; Walter, Marc D.; Kazhdan, Daniel; Hu, Yung-Jin; Lukens, Wayne W.; Bauer, Eric D.; Maron, Laurent; Eisenstein, Odile; Andersen, Richard A.

2009-04-22T23:59:59.000Z

436

Nanoengineering core/shell structured brucite@polyphosphate@amine hybrid system for enhanced flame retardant properties  

Science Journals Connector (OSTI)

Abstract A novel organic-inorganic hybrid flame retardant consisting of a brucite core and a dodecylamine polyphosphate shell was synthesized by a facile nanoengineering route. The flammability characterization and synergistic flame retardant mechanism of the core/shell flame retardant (CFR) in ethylene-vinyl acetate (EVA) blends had been compared with EVA/physical mixture (PM, with the given proportion of brucite and dodecylamine polyphosphate as well as CFR) and EVA/brucite blends. With the same loading amount (40 wt%) of fillers in EVA, the peak heat release rate and smoke production rate of EVA/CFR blends were significantly reduced to 49% and 48% of that of EVA/PM blends, respectively. Meanwhile, the limiting oxygen index (LOI) was increased up to 32 (14.3% higher than that of EVA/PM blends) and the UL-94 test could achieve the V-0 rating. These remarkable properties were obtained just by nanoengineeing the core/shell structured brucite@polyphosphate@amine hybrid system, facilitating the formation of intact and compact residue with fence structure in process of polymer composite burning.

Xuesong Wang; Hongchang Pang; Wendan Chen; Yuan Lin; Guiling Ning

2013-01-01T23:59:59.000Z

437

Retrieval of Tenth Single-shell Tank Complete at Hanford's Office of River  

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

Retrieval of Tenth Single-shell Tank Complete at Hanford's Office Retrieval of Tenth Single-shell Tank Complete at Hanford's Office of River Protection Retrieval of Tenth Single-shell Tank Complete at Hanford's Office of River Protection December 27, 2012 - 12:00pm Addthis EM’s Office of River Protection has successfully removed waste from a tenth storage tank at the Hanford site. Located in C Farm, C-109 is one of 16 underground tanks ranging in capacity from 55,000 to 530,000 gallons. EM's Office of River Protection has successfully removed waste from a tenth storage tank at the Hanford site. Located in C Farm, C-109 is one of 16 underground tanks ranging in capacity from 55,000 to 530,000 gallons. Standing near a pipe providing access to the tank below, workers initiate a water soak aimed at loosening hard-to-remove-waste from the bottom of the underground tank known as C-109.

438

Tss4U BV formerly Holecsol R S Renewable Energy Systems and Shell Solar  

Open Energy Info (EERE)

Tss4U BV formerly Holecsol R S Renewable Energy Systems and Shell Solar Tss4U BV formerly Holecsol R S Renewable Energy Systems and Shell Solar Energy Jump to: navigation, search Name Tss4U BV (formerly Holecsol, R&S Renewable Energy Systems and Shell Solar Energy) Place Veldhoven, Netherlands Zip 5503 Sector Solar, Wind energy Product Provides small solar and wind for offgrid applications, notably power for oil rigs. Coordinates 51.421746°, 5.404554° 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":51.421746,"lon":5.404554,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

439

Development of the CD Symcap platform to study gas-shell mix in implosions at the National Ignition Facility  

SciTech Connect

Surrogate implosions play an important role at the National Ignition Facility (NIF) for isolating aspects of the complex physical processes associated with fully integrated ignition experiments. The newly developed CD Symcap platform has been designed to study gas-shell mix in indirectly driven, pure T{sub 2}-gas filled CH-shell implosions equipped with 4 ?m thick CD layers. This configuration provides a direct nuclear signature of mix as the DT yield (above a characterized D contamination background) is produced by D from the CD layer in the shell, mixing into the T-gas core. The CD layer can be placed at different locations within the CH shell to probe the depth and extent of mix. CD layers placed flush with the gas-shell interface and recessed up to 8??m have shown that most of the mix occurs at the inner-shell surface. In addition, time-gated x-ray images of the hotspot show large brightly radiating objects traversing through the hotspot around bang-time, which are likely chunks of CH/CD plastic. This platform is a powerful new capability at the NIF for understanding mix, one of the key performance issues for ignition experiments.

Casey, D. T.; Smalyuk, V. A.; Tipton, R. E.; Pino, J. E.; Remington, B. A.; Rowley, D. P.; Weber, S. V.; Barrios, M.; Benedetti, L. R.; Bleuel, D. L.; Bond, E. J.; Bradley, D. K.; Caggiano, J. A.; Callahan, D. A.; Cerjan, C. J.; Edwards, M. J.; Fittinghoff, D.; Glenn, S.; Haan, S. W.; Hamza, A. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); and others

2014-09-15T23:59:59.000Z

440

Elastic ice shells of synchronous moons: Implications for cracks on Europa and non-synchronous rotation of Titan  

E-Print Network (OSTI)

A number of synchronous moons are thought to harbor water oceans beneath their outer ice shells. A subsurface ocean frictionally decouples the shell from the interior. This decoupling has led to proposals that a weak tidal or atmospheric torque might cause the shell to rotate differentially with respect to the synchronously rotating interior. Applications along these lines have been made to Europa and Titan. As a result of centrifugal and tidal forces, the oceans of Europa and Titan have ellipsoidal figures whose long axes point toward the parent planet. Any rotation of the shell away from its equilibrium position induces strains thereby increasing its elastic energy. Thus the shell is coupled to the ocean by an elastic torque. Regarding Europa, it is shown that the tidal torque is far too weak to produce stresses that could fracture the ice shell, thus refuting an idea that has been widely advocated. An alternative formation mechanism for large cracks is proposed. Two years of Cassini RADAR observations of T...

Goldreich, Peter M

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" 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

Deformed shell model results for neutrinoless double beta decay of nuclei in A=60-90 region  

E-Print Network (OSTI)

Nuclear transition matrix elements (NTME) for the neutrinoless double beta decay of $^{70}$Zn, $^{80}$Se and $^{82}$Se nuclei are calculated within the framework of the deformed shell model based on Hartree-Fock states. For $^{70}$Zn, jj44b interaction in $^{2}p_{3/2}$, $^{1}f_{5/2}$, $^{2}p_{1/2}$ and $^{1}g_{9/2}$ space with $^{56}$Ni as the core is employed. However, for $^{80}$Se and $^{82}$Se nuclei, a modified Kuo interaction with the above core and model space are employed. Most of our calculations in this region were performed with this effective interaction. However, jj44b interaction has been found to be better for $^{70}$Zn. After ensuring that DSM gives good description of the spectroscopic properties of low-lying levels in these three nuclei considered, the NTME are calculated. The deduced half-lives with these NTME, assuming neutrino mass is 1 eV, are $9.6 \\times 10^{25}$yr, $1.9 \\times 10^{27}$yr and $1.95 \\times 10^{24}$yr for $^{70}$Zn, $^{80}$Se and $^{82}$Se, respectively.

Sahu, R

2014-01-01T23:59:59.000Z

442

In what condition can the 125 GeV Higgs boson decay to a pair of on-shell W-bosons?  

E-Print Network (OSTI)

We have determined that the decay of the neutral boson at a mass around 125 GeV into an on-shell W^-W^+-pair in a uniform magnetic field becomes, in principle, possible and the new decay channel of this boson in a magnetic field is allowed by the energy and total angular momentum conservation laws. The required magnetic field strength for observation of the measurable effect is ~10^23 G (or in Teslas ~10^19 T). The existence of the other neutral boson with the spin J=0 and with the other mass is not either excluded in the mass range below 2m_W=160.77 GeV.

Gasimova, Rasmiyya E

2014-01-01T23:59:59.000Z

443

In what condition can the 125 GeV Higgs boson decay to a pair of on-shell W-bosons?  

E-Print Network (OSTI)

We have determined that the decay of the neutral boson at a mass around 125 GeV into an on-shell W^-W^+-pair in a uniform magnetic field becomes, in principle, possible and the new decay channel of this boson in a magnetic field is allowed by the energy and total angular momentum conservation laws. The required magnetic field strength for observation of the measurable effect is ~10^23 G (or in Teslas ~10^19 T). The existence of the other neutral boson with the spin J=0 and with the other mass is not either excluded in the mass range below 2m_W=160.77 GeV.

Rasmiyya E. Gasimova; Vali A. Huseynov

2014-09-12T23:59:59.000Z

444

Exploring the First Steps in Core–Shell Electrocatalyst Preparation: In Situ Characterization of the Underpotential Deposition of Cu on Supported Au Nanoparticles  

Science Journals Connector (OSTI)

Stephen W. T. Price , Jonathon D. Speed , Prabalini Kannan , and Andrea E. Russell * ... The underpotential deposition (upd) of a Cu shell on a non-Pt nanoparticle core followed by galvanic displacement of the Cu template shell to form core–shell electrocatalyst materials is one means by which the Pt-based mass activity targets required for commercialization of PEM fuel cells may be reached. ...

Stephen W. T. Price; Jonathon D. Speed; Prabalini Kannan; Andrea E. Russell

2011-10-27T23:59:59.000Z

445

The off-shell axial anomaly via the {gamma}*{pi}{sup 0} {yields} {gamma} transition  

SciTech Connect

The {gamma}*{pi}{sup 0} {yields} {gamma} form factor, including the extension off the pion mass-shell, is obtained from a generalized impulse approximation within a QCD-based model field theory known to provide an excellent description of the pion charge form factor. This approach implements dressing of the vertex functions and propagators consistent with dynamical chiral symmetry breaking, gauge invariance, quark confinement and perturbative QCD. Soft nonperturbative behavior, dictated by the axial anomaly, is found to evolve to the perturbative QCD limit only for Q{sup 2} {ge} 20 GeV{sup 2}.

Frank, M.R. [Univ. of Washington, Seattle, WA (United States). Institute for Nuclear Theory; Mitchell, K.L.; Tandy, P.C. [Kent State Univ., OH (United States); Roberts, C.D. [Argonne National Lab., IL (United States)

1995-01-01T23:59:59.000Z

446

Half-life calculation of one-proton emitters with a shell model potential  

SciTech Connect

The accumulated amount of data for half-lives of proton emitters still remains a challenge to the ability of nuclear models to reproduce them consistently. These nuclei are far from beta stability line in a region where the validity of current nuclear models is not guaranteed. A nuclear shell model is introduced to the calculation of the nuclear barrier of less deformed proton emitters. The predictions using the proposed model are in good agreement with the data, with the advantage of have used only a single parameter in the model.

Rodrigues, M. M.; Duarte, S. B. [Centro Brasileiro de Pesquisas Fisicas-CBPF/MCT Rua Dr. Xavier Sigaud, 150, 22290-180, Rio de Janeiro-RJ (Brazil); Teruya, N. [Departamento de Fisica, Universidade Federal da Paraiba - UFPB Campus de Joao Pessoa, 58051-970, Joao Pessoa - PB (Brazil)

2013-03-25T23:59:59.000Z

447

Some general aspects of thin-shell wormholes with cylindrical symmetry  

SciTech Connect

In this article we study a general class of nonrotating thin-shell wormholes with cylindrical symmetry. We consider two physically sound definitions of the flare-out condition and we show that the less restrictive one allows for the construction of wormholes with positive energy density at the throat. We also analyze the mechanical stability of these objects under perturbations preserving the symmetry, proving that previous results are particular cases of a general property. We present examples of wormholes corresponding to Einstein-Maxwell spacetimes.

Eiroa, Ernesto F. [Instituto de Astronomia y Fisica del Espacio, C.C. 67, Suc. 28, 1428, Buenos Aires (Argentina); Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab. I, 1428, Buenos Aires (Argentina); Simeone, Claudio [Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pab. I, 1428, Buenos Aires (Argentina)

2010-04-15T23:59:59.000Z

448

Core-shell ITO/ZnO/CdS/CdTe nanowire solar cells  

SciTech Connect

Radial p-n junction nanowire (NW) solar cells with high densities of CdTe NWs coated with indium tin oxide (ITO)/ZnO/CdS triple shells were grown with excellent heterointerfaces. The optical reflectance of the devices was lower than for equivalent planar films by a factor of 100. The best efficiency for the NW solar cells was ??=?2.49%, with current transport being dominated by recombination, and the conversion efficiencies being limited by a back contact barrier (?{sub B}?=?0.52?eV) and low shunt resistances (R{sub SH}?

Williams, B. L.; Phillips, L.; Major, J. D.; Durose, K. [Stephenson Institute for Renewable Energy, University of Liverpool, Chadwick Building, Peach St., Liverpool L69 7ZF (United Kingdom); Taylor, A. A.; Mendis, B. G.; Bowen, L. [G. J. Russell Microscopy Facility, University of Durham, South Road, Durham DH1 3LE (United Kingdom)

2014-02-03T23:59:59.000Z

449

Unique Solutions to Hartree-Fock Equations for Closed Shell Atoms  

E-Print Network (OSTI)

In this paper we study the problem of uniqueness of solutions to the Hartree and Hartree-Fock equations of atoms. We show, for example, that the Hartree-Fock ground state of a closed shell atom is unique provided the atomic number $Z$ is sufficiently large compared to the number $N$ of electrons. More specifically, a two-electron atom with atomic number $Z\\geq 35$ has a unique Hartree-Fock ground state given by two orbitals with opposite spins and identical spatial wave functions. This statement is wrong for some $Z>1$, which exhibits a phase segregation.

M. Griesemer; F. Hantsch

2010-12-23T23:59:59.000Z

450

Tank selection for Light Duty Utility Arm (LDUA) system hot testing in a single shell tank  

SciTech Connect

The purpose of this report is to recommend a single shell tank in which to hot test the Light Duty Utility Arm (LDUA) for the Tank Waste Remediation System (TWRS) in Fiscal Year 1996. The LDUA is designed to utilize a 12 inch riser. During hot testing, the LDUA will deploy two end effectors (a High Resolution Stereoscopic Video Camera System and a Still/Stereo Photography System mounted on the end of the arm`s tool interface plate). In addition, three other systems (an Overview Video System, an Overview Stereo Video System, and a Topographic Mapping System) will be independently deployed and tested through 4 inch risers.

Bhatia, P.K.

1995-01-31T23:59:59.000Z

451

Expansion of X-ray form factor for close shell using uncorrelated wave function  

SciTech Connect

The atomic scattering factor has been studied for Be+ve, and B+2ve ions using the uncorrelated wave function (Hartree-Fock (HF)) for inter particle electronic shells. The physical importance of this factor appears in its relation to several important atomic properties as, the coherent scattering intensity, the total scattering intensity, the incoherent scattering function, the coherent scattering cross section, the total incoherent cross section, the nuclear magnetic shielding constant, the geometrical structure factor. Also there is one atomic properties the one particle radial density distribution function D(r)has been studied using the partitioning technique.

AL-Robayi, Enas M. [Babylon University , College of Science for Women, laser Physics Department, Hilla (Iraq)

2013-12-16T23:59:59.000Z

452

Shell model in the complex energy plane and two-particle resonances  

Science Journals Connector (OSTI)

An implementation of the shell-model to the complex energy plane is presented. The representation used in the method consists of bound single-particle states, Gamow resonances and scattering waves on the complex energy plane. Two-particle resonances are evaluated, and their structure in terms of the single-particle degrees of freedom is analyzed. It is found that two-particle resonances are mainly built upon bound states and Gamow resonances, but the contribution of the scattering states is also important.

R. Id Betan; R. J. Liotta; N. Sandulescu; T. Vertse

2003-01-31T23:59:59.000Z

453

Shell Model Two Body Matrix Elements Calculations for the Neutrinoless Double Beta Decay of 48 Ca  

Science Journals Connector (OSTI)

In this paper we present two Shell Model approaches for computing the two?body matrix elements involved in the neutrinoless double beta decay of 48 Ca. One of the methods involves integration of the radial part over the momentum space while the other only requires computations in the coordinate space. This has an influence in the complexity of the numerical approach and the necessary computation time. We will explain how this reflects into the obtained results pointing out the advantages and the limitations of each method.

2010-01-01T23:59:59.000Z

454

Wire number doubling in plasma-shell regime increases z-accelerator x-ray power  

SciTech Connect

Doubling the number of tungsten wires from 120 to 240, keeping the mass fixed, increased the radiated x-ray power relative to the electrical power at the insulator stack of the z accelerator by (40{+-}20)% for 8.75- and 20-mm-radii z-pinch wire arrays. Radiation-magneto-hydrodynamic calculations suggest that the arrays were operating in the {open_quotes}plasma shell{close_quotes} regime, where the plasmas generated by the individual wires merge prior to the inward implosion of the entire array.

Sanford, T.W.L.; Spielman, R.B.; Chandler, G.A. [and others

1997-11-01T23:59:59.000Z

455

Indirect-Drive Noncryogenic Double-Shell Ignition Targets for the National Ignition Facility: Design and Analysis  

SciTech Connect

The central goal of the National Ignition Facility (NIF) is demonstration of controlled thermonuclear ignition. The mainline ignition target is a low-Z, single-shell cryogenic capsule designed to have weakly nonlinear Rayleigh-Taylor growth of surface perturbations. Double-shell targets are an alternative design concept that avoids the complexity of cryogenic preparation but has greater physics uncertainties associated with performance-degrading mix. A typical double-shell design involves a high-Z inner capsule filled with DT gas and supported within a low-Z ablator shell. The largest source of uncertainty for this target is the degree of highly evolved nonlinear mix on the inner surface of the high-Z shell. High Atwood numbers and feed-through of strong outer surface perturbation growth to the inner surface promote high levels of instability. The main challenge of the double-shell target designs is controlling the resulting nonlinear mix to levels that allow ignition to occur. Design and analysis of a suite of indirect-drive NIF double-shell targets with hohlraum temperatures of 200 eV and 250 eV are presented. Analysis of these targets includes assessment of two-dimensional radiation asymmetry as well as nonlinear mix. Two-dimensional integrated hohlraum simulations indicate that the x-ray illumination can be adjusted to provide adequate symmetry control in hohlraums specially designed to have high laser-coupling efficiency [Suter et al., Phys. Plasmas 5, 2092 (2000)]. These simulations also reveal the need to diagnose and control localized 10-15 keV x-ray emission from the high-Z hohlraum wall because of strong absorption by the high-Z inner shell. Preliminary estimates of the degree of laser backscatter from an assortment of laser-plasma interactions suggest comparatively benign hohlraum conditions. Application of a variety of nonlinear mix models and phenomenological tools, including buoyancy-drag models, multimode simulations and fall-line optimization, indicates a possibility of achieving ignition, i.e., fusion yields greater than 1 MJ. Planned experiments on the Omega laser to test current understanding of high-energy radiation flux asymmetry and mix-induced yield degradation in double-shell targets are described.

Amendt, P.; Colvin, J.; Tipton, R.E.; Hinkel, D.; Edwards, J.J.; Landen, O.I.; Ramshaw, J.D.; Suter, L.J.; Watt, W.G.

2001-10-15T23:59:59.000Z

456

Contaminant Release Data Package for Residual Waste in Single-Shell Hanford Tanks  

SciTech Connect

The Hanford Federal Facility Agreement and Consent Order requires that a Resource Conservation and Recovery Act (RCRA) Facility Investigation report be submitted to the Washington State Department of Ecology. The RCRA Facility Investigation report will provide a detailed description of the state of knowledge needed for tank farm performance assessments. This data package provides detailed technical information about contaminant release from closed single-shell tanks necessary to support the RCRA Facility Investigation report. It was prepared by Pacific Northwest National Laboratory (PNNL) for CH2M HILL Hanford Group, Inc., which is tasked by the U.S. Department of Energy (DOE) with tank closure. This data package is a compilation of contaminant release rate data for residual waste in the four Hanford single-shell tanks (SSTs) that have been tested (C-103, C-106, C-202, and C-203). The report describes the geochemical properties of the primary contaminants of interest from the perspective of long-term risk to groundwater (uranium, technetium-99, iodine-129, chromium, transuranics, and nitrate), the occurrence of these contaminants in the residual waste, release mechanisms from the solid waste to water infiltrating the tanks in the future, and the laboratory tests conducted to measure release rates.

Deutsch, William J.; Cantrell, Kirk J.; Krupka, Kenneth M.

2007-12-01T23:59:59.000Z

457

Engineering Basis Document Review Supporting the Double Shell Tank (DST) System Specification Development  

SciTech Connect

The Double-Shell Tank (DST) System is required to transition from its current storage mission to a storage and retrieval mission supporting the River Protection Project Phase 1 privatization, defined in HNF-SD-WM-MAR-008, Tank Waste Remediation System Mission Analysis Report. Requirements for the DST subsystems are being developed using the top-down systems engineering process outlined in HNF-SD-WM-SEMP-002, Tank Waste Remediation System Systems Engineering Management Plan. This top-down process considers existing designs to the extent that these designs impose unavoidable constraints on the Phase 1 mission. Existing engineering-basis documents were screened, and the unavoidable constraints were identified. The constraints identified herein will be added to the DST System specification (HNF-SD-WM-TRD-007, System Specification for the Double-Shell Tank System). While the letter revisions of the DST System specification were constructed with a less rigorous review of the existing engineering-basis documents, the Revision 0 release of the specification must incorporate the results of the review documented herein. The purpose of this document is to describe the screening process and criteria used to determine which constraints are unavoidable and to document the screening results.

LEONARD, M.W.

2000-03-14T23:59:59.000Z

458

Higgs-radion similarity in production processes involving off-shell fermions  

E-Print Network (OSTI)

The appearance of the radion field, which is associated with the spin-0 metric fluctuations combined in some manner with the scalar stabilizing field, and of the radion, the corresponding lowest Kaluza-Klein (KK) mode, is a generic prediction of stabilized brane world models. In such models the radion plays the role of the dilaton, and its mass may be somewhat smaller than that of all the KK modes of other particles propagating in the multidimensional bulk. Due to its origin, the radion couples to the trace of the energy-momentum tensor of the Standard Model, the interaction Lagrangian of the radion and the Standard Model fermions being similar to that of the SM Higgs-fermion interactions except for additional terms, which come into play only in the case of off-shell fermions. In the present paper it is shown that all the contributions to perturbative amplitudes of physical processes due to these additional terms are canceled out for both massless and massive off-shell fermions. Thus the additional fermion-radion terms in the interaction Lagrangian do not alter any production and decay properties of the radion compared to those of the Higgs boson.

E. Boos; S. Keizerov; E. Rahmetov; K. Svirina

2014-09-09T23:59:59.000Z

459

Hanford Double-Shell Tank Extent-of-Condition Review - 15498  

SciTech Connect

During routine visual inspections of Hanford double-shell waste tank 241-AY-102 (AY-102), anomalies were identified on the annulus floor which resulted in further evaluations. Following a formal leak assessment in October 2012, Washington River Protection Solutions, LLC (WRPS) determined that the primary tank of AY-102 was leaking. A formal leak assessment, documented in RPP-ASMT-53793, Tank 241-AY-102 Leak Assessment Report, identified first-of-a-kind construction difficulties and trial-and-error repairs as major contributing factors to tank failure.1 To determine if improvements in double-shell tank (DST) construction occurred after construction of tank AY-102, a detailed review and evaluation of historical construction records was performed for Hanford’s remaining twenty-seven DSTs. Review involved research of 241 boxes of historical project documentation to better understand the condition of the Hanford DST farms, noting similarities in construction difficulties/issues to tank AY-102. Information gathered provides valuable insight regarding construction difficulties, future tank operations decisions, and guidance of the current tank inspection program. Should new waste storage tanks be constructed in the future, these reviews also provide valuable lessons-learned.

Johnson, J. M.; Baide, D. D.; Barnes, T. J.; Boomer, K. D.; Gunter, J. R.; Venetz, T. J.

2014-11-19T23:59:59.000Z

460

K-Shell Photoionization of B-like Oxygen (O$^{3+}$) Ions: Experiment and Theory  

E-Print Network (OSTI)

Absolute cross sections for the {\\it K}-shell photoionization of boron-like (B-like) O$^{3+}$ ions were measured by employing the ion-photon merged-beam technique at the SOLEIL synchrotron-radiation facility in Saint-Aubin, France. High-resolution spectroscopy with E/$\\Delta$E $\\approx$ 5000 ($\\approx$ 110 meV, FWHM) was achieved with photon energy from 540 eV up to 600 eV. Several theoretical approaches, including R-Matrix, Multi-Configuration Dirac-Fock and Screening Constant by Unit Nuclear Charge were used to identify and characterize the strong 1s $\\rightarrow$ 2p and the weaker 1s $\\rightarrow$ 3p resonances observed in the {\\it K}-shell spectra of this ion. The trend of the integrated oscillator strength and autoionisation width (natural line width) of the strong $\\rm 1s \\rightarrow 2p$ resonances along the first few ions of the B-like sequence is discussed.

McLaughlin, B M; Cubaynes, D; Shorman, M M Al; Guilbaud, S; Sakho, I; Blancard, C; Gharaibeh, M F

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" 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

Bottom head to shell junction assembly for a boiling water nuclear reactor  

DOE Patents (OSTI)

A bottom head to shell junction assembly which, in one embodiment, includes an annular forging having an integrally formed pump deck and shroud support is described. In the one embodiment, the annular forging also includes a top, cylindrical shaped end configured to be welded to one end of the pressure vessel cylindrical shell and a bottom, conical shaped end configured to be welded to the disk shaped bottom head. Reactor internal pump nozzles also are integrally formed in the annular forging. The nozzles do not include any internal or external projections. Stubs are formed in each nozzle opening to facilitate welding a pump housing to the forging. Also, an upper portion of each nozzle opening is configured to receive a portion of a diffuser coupled to a pump shaft which extends through the nozzle opening. Diffuser openings are formed in the integral pump deck to provide additional support for the pump impellers. The diffuser opening is sized so that a pump impeller can extend at least partially therethrough. The pump impeller is connected to the pump shaft which extends through the nozzle opening. 5 figs.

Fife, A.B.; Ballas, G.J.

1998-02-24T23:59:59.000Z

462

Nature of $?$-deformation in Ge and Se nuclei and the triaxial projected shell model description  

E-Print Network (OSTI)

Recent experimental data have demonstrated that $^{76}$Ge may be a rare example of a nucleus exhibiting rigid $\\gamma$-deformation in the low-spin regime. In the present work, the experimental analysis is supported by microscopic calculations using the multi-quasiparticle triaxial projected shell model (TPSM) approach. It is shown that to best describe the data of both yrast and $\\gamma$-vibrational bands in $^{76}$Ge, a rigid-triaxial deformation parameter $\\gamma\\approx 30^\\circ$ is required. TPSM calculations are discussed in conjunction with the experimental observations and also with the published results from the spherical shell model. The occurrence of a $\\gamma\\gamma$-band in $^{76}$Ge is predicted with the bandhead at an excitation energy of $ \\sim$ 2.5 MeV. We have also performed TPSM study for the neighboring Ge- and Se-isotopes and the distinct $\\gamma$-soft feature in these nuclei is shown to result from configuration mixing of the ground-state with multi-quasiparticle states.

G. H. Bhat; W. A. Dar; J. A. Sheikh; Y. Sun

2014-01-08T23:59:59.000Z

463

Shell model description of N=81 five-exciton Xe135 and the decay of I135  

Science Journals Connector (OSTI)

We have measured the spectrum of ? rays following the decay of 6.55±0.03-h I135 to levels of Xe135. These ??-coincidence measurements have enabled us to construct a level scheme with 31 levels below 2700 keV and make a number of spin and parity assignments. The levels and their deexcitation properties are used to test a large-scale shell model calculation. In general, good agreement is found for this limiting case of the large-scale shell model code. Precise energy values and absolute intensities for the ? rays were determined for use in reactor effluent metrology.NUCLEAR STRUCTURE Shell model calculations five exciton test case.RADIOACTIVITY I135 fission product, radiochemical separation. Determined t12, E?, and I?. Xe135 deduced levels and J? values.

W. B. Walters; S. M. Lane; N. L. Smith; R. J. Nagle; R. A. Meyer

1982-11-01T23:59:59.000Z

464

Core/shell structures of oxygen-rich nanofeatures in oxide-dispersion strengthened Fe-Cr alloys  

SciTech Connect

With the significant improvement in high temperature creep properties and resistance to radiation damage by addition of nanoscale oxide features, oxide-dispersion strengthened (ODS) ferritic/martensitic alloys are potential candidates for structural applications in nuclear fusion reactors. The structure of the oxygen-rich nanofeatures was analyzed by atom-probe tomography in three ODS alloys: MA957, ODS Fe-12 wt %Cr, and ODS Eurofer-97. Although field evaporation and reconstruction of the precipitates suffer from artefacts, a core/shell structure is found even for very small precipitates. Precipitate cores are Y rich while shell regions are enriched in Ti, Cr, or V depending on alloy composition.

Marquis, Emmanuelle A. [Department of Materials, University of Oxford, Oxford OX1 3PH (United Kingdom)

2008-11-03T23:59:59.000Z

465

Preparation of core–shell Fe3O4/SiO2 microspheres as adsorbents for purification of DNA  

Science Journals Connector (OSTI)

Nearly monodisperse core–shell Fe3O4/SiO2 microspheres have been prepared via a glycol reduction method followed by a modified Stöber process. The thickness of the silica shells can be tuned in the range 33–53?nm by varying the amount of tetraethyl silicate (TEOS) during syntheses. The magnetic composite microspheres were characterized with XRD, XPS, FTIR, TEM, ICP–OES and VSM, and further tested as adsorbents for purification of plasmid DNA from Escherichia coli DH5? cells. The magnetic purification of plasmid DNA leads to satisfying integrity, yield and purity in comparison with those isolated by the traditional phenol–chloroform extraction.

Ligang Gai; Zhili Li; Yunhua Hou; Haihui Jiang; Xiaoyun Han; Wanyong Ma

2010-01-01T23:59:59.000Z

466

Two-nucleon high-spin states, the Bansal-French model and the crude shell model  

Science Journals Connector (OSTI)

Recent data on two-nucleon stretched high-spin states agree well with the crude shell model predictions. For two-neutron high-spin states, the A and T linear dependence of B2n in the Bansal-French model can be deduced from the A and T linear dependence of Bn and the crude shell model. 72- states in some Zn and Ge even nuclei might be two-proton states. This hypothesis should be confirmed by two-proton transfer reaction.

Tsan Ung Chan

1987-08-01T23:59:59.000Z

467

Formation of core/shell-like ZnSe(1?x)Te(x) nanocrystals due to equilibrium surface segregation  

SciTech Connect

We report results of equilibrium surface segregation in ZnSe{sub 1?x}Te{sub x} nanocrystals based on a computational analysis of coupled compositional, structural, and volume relaxation of the nanocrystals that employs Monte Carlo and conjugate-gradient methods according to a first-principles-parameterized description of interatomic interactions. We have determined the equilibrium concentration distribution as a function of nanocrystal size and composition for nanocrystal morphologies that include faceted equilibrium crystal shapes. The results identify the nanoparticle size and composition ranges that allow for self-assembly of core/shell-like nanocrystal structures characterized by a Te-deficient core and a Te-rich shell.

Pandey, Sumeet C.; Mountziaris, T. J.; Venkataraman, Dhandapani; Maroudas, Dimitris

2010-01-01T23:59:59.000Z

468

Institut fr Informatik Nachhaltigkeit in der Informatik  

E-Print Network (OSTI)

Induction effects Rebound effects New critical infrastructure Source: Hilty, L. M.: Information Technology as part of the problem Induction effects Rebound effects New critical infrastructure Source: Hilty, L. M.: Information Technology and Sustainability. Essays on the Relationship between ICT and Sustainable Development

Hamburg,.Universität

469

Combustion of palm kernel shell in a fluidized bed: Optimization of biomass particle size and operating conditions  

Science Journals Connector (OSTI)

Abstract This work presents a study on the combustion of palm kernel shell (PKS) in a conical fluidized-bed combustor (FBC) using alumina sand as the bed material to prevent bed agglomeration. Prior to combustion experiments, a thermogravimetric analysis was performed in nitrogen and dry air to investigate the effects of biomass particle size on thermal and combustion reactivity of PKS. During the combustion tests, the biomass with different mean particle sizes (1.5 mm, 4.5 mm, 7.5 mm, and 10.5 mm) was burned at a 45 kg/h feed rate, while excess air was varied from 20% to 80%. Temperature and gas concentrations (O2, CO, CxHy as CH4, and NO) were recorded along the axial direction in the reactor as well as at stack. The experimental results indicated that the biomass particle size and excess air had substantial effects on the behavior of gaseous pollutants (CO, CxHy, and NO) in different regions inside the reactor, as well as on combustion efficiency and emissions of the conical FBC. The CO and CxHy emissions can be effectively controlled by decreasing the feedstock particle size and/or increasing excess air, whereas the NO emission can be mitigated using coarser biomass particles and/or lower excess air. A cost-based approach was applied to determine the optimal values of biomass particle size and excess air, ensuring minimum emission costs of burning the biomass in the proposed combustor. From the optimization analysis, the best combustion and emission performance of the conical FBC is achievable when burning PKS with a mean particle size of about 5 mm at excess air of 40–50%. Under these conditions, the combustor can be operated with high (99.4–99.7%) combustion efficiency, while controlling the gaseous emissions at acceptable levels. No evidence of bed agglomeration was found in this conical FBC using alumina as the bed material for the entire time period of experimental tests.

Pichet Ninduangdee; Vladimir I. Kuprianov

2014-01-01T23:59:59.000Z

470

ZnO-TiO2 Core-Shell Nanorod/P3HT Solar Cells Lori E. Greene, Matt Law, Benjamin D. Yuhas, and Peidong Yang*  

E-Print Network (OSTI)

diffusion bottleneck, has been addressed in organic and organic-inorganic hybrid solar cells by adoptingZnO-TiO2 Core-Shell Nanorod/P3HT Solar Cells Lori E. Greene, Matt Law, Benjamin D. Yuhas-inorganic solar cell architecture based on ZnO-TiO2 core-shell nanorod arrays encased in the hole

Yang, Peidong

471

STATEMENT OF CONSIDERATIONS REQUEST BY SHELL SOLAR INDUSTRIES, LP FOR AN ADVANCE  

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

INDUSTRIES, LP FOR AN ADVANCE INDUSTRIES, LP FOR AN ADVANCE WAIVER OF DOMESTIC AND FOREIGN PATENT RIGHTS UNDER NREL SUBCONTRACT NO. ZDJ-2-30630-16 UNDER DOE CONTRACT NO. DE-AC36-98GO10337; W(A)-03-010; CH-1136 As set out in the attached waiver petition and in subsequent discussions with DOE, Shell Solar Industries, LP (SSI) has requested an advance waiver of domestic and foreign patent rights for all subject inventions made under the above-identified cooperative agreement by its employees and its subcontractors' employees, regardless of tier, except inventions made by subcontractors eligible to retain title to inventions pursuant to P.L. 96-517, as amended, and National Laboratories. Referring to item 2 of SSl's waiver petition, the purpose of the subcontract encompasses the development of thin-film module processing and cell and module reliability.

472

STATEMENT OF CONSIDERATIONS REQUEST BY SHELL SOLAR SYSTEMS, LP FOR AN ADVANCE WAIVER OF  

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

SYSTEMS, LP FOR AN ADVANCE WAIVER OF SYSTEMS, LP FOR AN ADVANCE WAIVER OF PATENT RIGHTS UNDER NREL SUBCONTRACT NO. ZDO-2-30628-06 ENTITLED "PV MANUFACTURING R&D-INTEGRATED CIS THIN-FILM MANUFACTURING INFRASTRUCTURE" UNDER DOE CONTRACT NO. DE- AC36-83CH10093; W(A)-02-039; CH-1116 As set out ins the attached waiver petition and in subsequent discussions with DOE Patent Counsel, Shell Solar Systems, LP (SSI) has requested an advance waiver of domestic and foreign patent rights for all subject inventions made under the above-identified subcontract by its employees and its subcontractors' employees, regardless of tier, except inventions made by subcontractors eligible to retain title to inventions pursuant to P.L. 98-517, as amended, and National Laboratories. Referring to item 2 of SSI's waiver petition, the purpose of this subcontract

473

STATEMENT OF CONSIDERATIONS REQUEST BY SHELL SOLAR INDUSTRIES LP FOR AN ADVANCE WAIVER OF  

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

ZAX-5-33628-07 ENTITLED "MANUFACTURING IMPROVEMENTS IN Cz SILICON ZAX-5-33628-07 ENTITLED "MANUFACTURING IMPROVEMENTS IN Cz SILICON MODULE PRODUCTION;" UNDER DOE CONTRACT NO. DE-AC36-98GO10337; W(A)-05-060; CH-1346 As set out in the attached waiver petition and in subsequent discussions with DOE Patent Counsel, Shell Solar Industries LP (SSI) has requested an advance waiver of domestic and foreign patent rights for all subject inventions made under the above-identified subcontract by its employees and its subcontractors' employees, regardless of tier, except inventions made by subcontractors eligible to retain title to inventions pursuant to P.L. 96-517, as amended, and National Laboratories. Referring to item 2 of SSI's waiver petition, the purpose of this subcontract encompasses the development of improved photovoltaic (PV) manufacturing techniques

474

The analysis of rib-stiffened shallow shells by means of the compliance method  

E-Print Network (OSTI)

surface to the middle surface displacements can be expressed as: 1 9U 6 1 R hot (2. . 32) Figure 2. Cylindrical Shallow Shell. 20 ? ( ? + w) 1 av aa (2. 33) (2. 34) 1 B w 2 R 'ok 2 2 1 ~w 2 R 0P 1 b w 2 2 S~b)3 (2. 35) (2. 36) (2. 37...) and considering (3. 1? 3. 3), the following is obtained: 1 ~iP ll 'h w 12 66 'b w R ad, 2 ' R 2 2d, 4 R 2 ~d, 2 bP2 + =RZ 22 hw 2 R (3. 13) 32 Thus, after certain transformations from the equilibrium equa- tions (2. 38-Z. 42), a single equation with two...

Trainer, Lloyd Douglass

2012-06-07T23:59:59.000Z

475

Hanford Double-Shell Tank AY-102 Radioactive Waste Leak Investigation Update - 15302  

SciTech Connect

Tank AY-102 was the first of 28 double-shell radioactive waste storage tanks constructed at the U. S. Department of Energy’s Hanford Site, near Richland, WA. The tank was completed in 1970, and entered service in 1971. In August, 2012, an accumulation of material was discovered at two sites on the floor of the annulus that separates the primary tank from the secondary liner. The material was sampled and determined to originate from the primary tank. This paper summarizes the changes in leak behavior that have occurred during the past two years, inspections to determine the capability of the secondary liner to continue safely containing the leakage, and the initial results of testing to determine the leak mechanism.

Washenfelder, D. J.; Johnson, J. M.

2014-12-22T23:59:59.000Z

476

An electron microscopy study of the microstructure and microarchitecture of the Strombus gigas shell  

SciTech Connect

A scanning and transmission electron microscopy study is presented of the microstructure of the Strombus gigas shell. The hierarchical nature of this crossed-lamellar structure and the defect content of the mineral component are described. The mineral component consists of small single crystal grains of aragonite, the metastable orthorhombic polymorph of CaCO{sub 3}. The habit and morphology of the grains discussed here have not been determined previously. The observed habit and defect structure suggest that the organic matrix exerts a high degree of control over the crystal growth of the mineral phase and is responsible for the long range order in the microarhitecture. Electron beam heating of the mineral component leads to certain phase changes and these are discussed. 15 refs., 6 figs.

Rieke, P.C.; Laraia, V.J. (Pacific Northwest Lab., Richland, WA (USA)); Heuer, A.H. (Case Western Reserve Univ., Cleveland, OH (USA)); Aindow, M. (Ohio State Univ., Columbus, OH (USA))

1989-11-01T23:59:59.000Z

477

Origin of fine structure of the giant dipole resonance in sd-shell nuclei  

E-Print Network (OSTI)

A set of high resolution zero-degree inelastic proton scattering data on 24Mg, 28Si, 32S, and 40Ca provides new insight into the long-standing puzzle of the origin of fragmentation of the Giant Dipole Resonance (GDR) in sd-shell nuclei. Understanding is provided by state-of-the-art theoretical Random Phase Approximation (RPA) calculatios for deformed nuclei using for the first time a realistic nucleon-nucleon interaction derived from the Argonne V18 potential with the unitary correlation operator method and supplemented by a phenomenological three-nucleon contact interaction. A wavelet analysis allows to extract significant scales both in the data and calculations characterizing the fine structure of the GDR. The fair agreement supports that the fine structure arises from ground-state deformation driven by alpha clustering.

R. W. Fearick; B. Erler; H. Matsubara; P. von Neumann-Cosel; A. Richter; R. Roth; A. Tamii

2014-09-03T23:59:59.000Z

478

Photo-driven autonomous hydrogen generation system based on hierarchically shelled ZnO nanostructures  

SciTech Connect

A quantum dot semiconductor sensitized hierarchically shelled one-dimensional ZnO nanostructure has been applied as a quasi-artificial leaf for hydrogen generation. The optimized ZnO nanostructure consists of one dimensional nanowire as a core and two-dimensional nanosheet on the nanowire surface. Furthermore, the quantum dot semiconductors deposited on the ZnO nanostructures provide visible light harvesting properties. To realize the artificial leaf, we applied the ZnO based nanostructure as a photoelectrode with non-wired Z-scheme system. The demonstrated un-assisted photoelectrochemical system showed the hydrogen generation properties under 1 sun condition irradiation. In addition, the quantum dot modified photoelectrode showed 2 mA/cm{sup 2} current density at the un-assisted condition.

Kim, Heejin; Yong, Kijung [Surface Chemistry Laboratory of Electronic Materials, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784 (Korea, Republic of)] [Surface Chemistry Laboratory of Electronic Materials, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784 (Korea, Republic of)

2013-11-25T23:59:59.000Z

479

Production and survival of /sup 99/Tc in He-shell recurrent thermal pulses  

SciTech Connect

After a brief introduction to the present state of art of nuclear beta-decay studies in astrophysics, we report our recent work on the long-standing /sup 99/Tc problem. Having combined a detailed study of the recurrent He-shell thermal-pulse, third dredge-up episodes in a 2.25 M/sub solar/ star and an s-process network calculation, we show that a substantial amount of /sup 99/Tc can be produced by the s-process and can survive to be dredged up to the stellar surface. We stress that the factual observation of /sup 99/Tc at the surface of certain stars does not necessarily preclude the /sup 22/Ne(..cap alpha..,n)/sup 25/Mg reaction from remaining as the neutron source for the s-process. The calculated surface abundances of /sup 99/Tc and elements with neighboring atomic numbers are compared with observations. 43 refs., 5 figs.

Takahashi, K.; Mathews, G.J.; Ward, R.A.; Becker, S.A.

1985-05-30T23:59:59.000Z

480

Luminescence and electrical properties of single ZnO/MgO core/shell nanowires  

SciTech Connect

To neutralise the influence of the surface of ZnO nanowires for photonics and optoelectronic applications, we have covered them with insulating MgO film and individually contacted them for electrical characterisation. We show that such a metal-insulator-semiconductor-type nanodevice exhibits a high diode ideality factor of 3.4 below 1?V. MgO shell passivates ZnO surface states and provides confining barriers to electrons and holes within the ZnO core, favouring excitonic ultraviolet radiative recombination, while suppressing defect-related luminescence in the visible and improving electrical conductivity. The results indicate the potential use of ZnO/MgO nanowires as a convenient building block for nano-optoelectronic devices.

Grinblat, Gustavo; Comedi, David [Laboratorio de Física del Sólido, Dep. de Física, FACET, Universidad Nacional de Tucumán, Tucumán, and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) (Argentina)] [Laboratorio de Física del Sólido, Dep. de Física, FACET, Universidad Nacional de Tucumán, Tucumán, and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) (Argentina); Bern, Francis; Barzola-Quiquia, José; Esquinazi, Pablo, E-mail: esquin@physik.uni-leipzig.de [Division of Superconductivity and Magnetism, Institute for Experimental Physics II, University of Leipzig, D-04103 Leipzig (Germany)] [Division of Superconductivity and Magnetism, Institute for Experimental Physics II, University of Leipzig, D-04103 Leipzig (Germany); Tirado, Mónica [Laboratorio de Nanomateriales y Propiedades Dieléctricas, Dep. de Física, FACET, Universidad Nacional de Tucumán, Tucumán (Argentina)] [Laboratorio de Nanomateriales y Propiedades Dieléctricas, Dep. de Física, FACET, Universidad Nacional de Tucumán, Tucumán (Argentina)

2014-03-10T23:59:59.000Z

Note: This page contains sample records for the topic "rebound effect shell" from the National Library of EnergyBeta (NLEBeta).
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481

Reaction-in-Flight Neutrons as a Signature for Shell Mixing in NIF capsules  

E-Print Network (OSTI)

We present analytic calculations and results from computational simulations showing that reaction-in-flight (RIF) neutrons act as a robust indicator for mixing of the ablator shell material into the fuel in DT capsules designed for the National Ignition Facility. The sensitivity of RIF neutrons to hydrodynamical mixing arises through the dependence of RIF production on charged-particle stopping lengths in the mixture of DT fuel and ablator material. Since the stopping power in the plasma is a sensitive function of the electron temperature and density, it is also sensitive to mix. RIF production scales approximately inversely with the degree of mixing taking place, and the ratio of RIF to downscattered neutrons provides a measure of the mix fraction and/or the mixing length. For sufficiently high-yield capsules, where spatially resolved RIF images may be possible, neutron imaging could be used to map RIF images into detailed mix images.

A. C. Hayes; P. A. Bradley; G. P. Grim; Gerard Jungman; J. B. Wilhelmy

2009-07-17T23:59:59.000Z

482

Reaction-in-Flight Neutrons as a Signature for Shell Mixing in NIF capsules  

E-Print Network (OSTI)

We present analytic calculations and results from computational simulations showing that reaction-in-flight (RIF) neutrons act as a robust indicator for mixing of the ablator shell material into the fuel in DT capsules designed for the National Ignition Facility. The sensitivity of RIF neutrons to hydrodynamical mixing arises through the dependence of RIF production on charged-particle stopping lengths in the mixture of DT fuel and ablator material. Since the stopping power in the plasma is a sensitive function of the electron temperature and density, it is also sensitive to mix. RIF production scales approximately inversely with the degree of mixing taking place, and the ratio of RIF to downscattered neutrons provides a measure of the mix fraction and/or the mixing length. For sufficiently high-yield capsules, where spatially resolved RIF images may be possible, neutron imaging could be used to map RIF images into detailed mix images.

Hayes, A C; Grim, G P; Jungman, Gerard; Wilhelmy, J B

2009-01-01T23:59:59.000Z

483

Double-shell tank integrity assessments ultrasonic test equipment performance test  

SciTech Connect

A double-shell tank (DST) inspection (DSTI) system was performance tested over three months until August 1995 at Pittsburgh, Pennsylvania, completing a contract initiated in February 1993 to design, fabricate, and test an ultrasonic inspection system intended to provide ultrasonic test (UT) and visual data to determine the integrity of 28 DSTs at Hanford. The DSTs are approximately one-million-gallon underground radioactive-waste storage tanks. The test was performed in accordance with a procedure (Jensen 1995) that included requirements described in the contract specification (Pfluger 1995). This report documents the results of tests conducted to evaluate the performance of the DSTI system against the requirements of the contract specification. The test of the DSTI system also reflects the performance of qualified personnel and operating procedures.

Pfluger, D.C.

1996-09-26T23:59:59.000Z

484

Accurate shell-model nuclear matrix elements for neutrinoless double-beta decay  

E-Print Network (OSTI)

We investigate a novel method of accurate calculation of the neutrinoless double-$\\beta$ decay shell-model nuclear matrix elements for the experimentally relevant case of $^{76}$Ge. We demonstrate that with the new method the nuclear matrix elements have perfect convergence properties and, using only the first 100 intermediate states of each spin, the matrix elements can be calculated with better than 1% accuracy. Based on the analysis of neutrinoless double-beta decays of $^{48}$Ca, $^{82}$Se, and $^{76}$Ge isotopes, we propose a new method to estimate the optimal values of the average closure energies at which the closure approximation gives the most accurate nuclear matrix elements. We also analyze the nuclear matrix elements for the heavy-neutrino-exchange mechanism, and we show that our method can be used to quench contributions from different intermediate spin states.

R. A. Sen'kov; M. Horoi

2014-11-06T23:59:59.000Z

485

Cross-sectional aspect ratio modulated electronic properties in Si/Ge core/shell nanowires  

SciTech Connect

Electronic structures of (4, n) and (m, 4) (the NW has m layers parallel to the {1?1?1} facet and n layers parallel to {1?1?0}) Si/Ge core/shell nanowires (NWs) along the [1?1?2] direction with cross-sectional aspect ratio (m/n) from 0.36 to 2.25 are studied by first-principles calculations. An indirect to direct band gap transition is observed as m/n decreases, and the critical values of m/n and diameter for the transition are also estimated. The size of the band gap also depends on the aspect ratio. These results suggest that m/n plays an important role in modulating the electronic properties of the NWs.

Liu, Nuo [Ames Laboratory; Lu, Ning [Ames Laboratory; Yao, Yong-Xin [Ames Laboratory; Zhang, Gui-Ping [Ames Laboratory; Wang, Cai-Zhuang [Ames Laboratory; Ho, Kai-Ming [Ames Laboratory

2013-02-28T23:59:59.000Z

486

First-passage time for the snap-through of a shell-type structure  

Science Journals Connector (OSTI)

The first-passage problem associated with snap-through of a shallow cylindrical shell subjected to a wide-band stationary stochastic loading is examined in this paper. The structure is sufficiently flat so as to exhibit only a symmetric mode under the action of the applied load. The approach utilizes a high-speed simulation technique to obtain sufficient samples from which statistics of the response may be computed. This allows the calculation of an approximate probability distribution for the parameter of interest. Zero initial conditions are assumed so that the problem is non-stationary. Results of this analysis are compared with the mean first-passage time obtained by numerically solving the associated Pontriagin-Vitt equation.

H.N. Pi; S.T. Ariaratnam; W.C. Lennox

1971-01-01T23:59:59.000Z

487

Shell-Model Analysis of the Level Structure of Ar41  

Science Journals Connector (OSTI)

Levels of Ar41 experimentally observed up to excitation energy of 4.5 MeV are considered. Using experimental data from neighboring nuclei the positions of 40 odd-parity states are calculated in the framework of the shell model. Good agreement is obtained for the low-lying levels. Approximate treatment of the d322f722p32 and d322f722p12 configurations in addition to the d322f723 ground configuration gives a semi-quantitative account of all odd parity 3/2 and 1/2 levels up to 4.5 MeV. Many odd-parity levels with J>32 which were not yet found experimentally are predicted to be in this region.

Y. Shadmi and I. Talmi

1963-02-01T23:59:59.000Z

488

Analysis of Sandwich Shells with Metallic Foam Cores based on the Uniaxial Tensile Test  

SciTech Connect

On this work, the authors present the development and evaluation of an innovative system able to perform reliable panels of sandwich sheets with metallic foam cores for industrial applications, especially in automotive and aeronautical industries. This work is divided into two parts; in the first part the mathematical model used to describe the behavior of sandwich shells with metal cores form is presented and some numerical examples are presented. In the second part of this work, the numerical results are validated using the experimental results obtained from the mechanical experiments. Using the isotropic hardening crushable foam constitutive model, available on ABAQUS, a set of different mechanical tests were simulated. The isotropic hardening model available uses a yield surface that is an ellipse centered at the origin in the p-q stress plane. Using this constitutive model, the uniaxial tensile test for this material was simulated, and a comparison with the experimental results was made.

Mata, H.; Fernandes, A. A.; Parente, M. P. L.; Jorge, R. Natal [IDMEC-FEUP, Rua Dr. Roberto Frias, 4200-465, Porto (Portugal); Santos, A. [INEGI, Rua Dr. Roberto Frias, 4200-465, Porto (Portugal); Valente, R. A. F. [Universidade de Aveiro, Campus Universitario de Santiago, 3810-193, Aveiro (Portugal)

2011-05-04T23:59:59.000Z

489

Independent Oversight Review of Hanford Tank Farms Safety Basis Amendment for Double-Shell Tank Ventilation System Upgrades, November 2011  

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

Hanford Tank Farms Safety Basis Amendment for Double-Shell Tank Ventilation System Upgrades November 2011 Office of Safety and Emergency Management Evaluations Office of Enforcement and Oversight Office of Health, Safety and Security U.S. Department of Energy i Table of Contents 1.0 Purpose ................................................................................................................................................... 1 2.0 Background ............................................................................................................................................ 1 3.0 Scope and Approach .............................................................................................................................. 2

490

First Observations of Nonhydrodynamic Mix at the Fuel-Shell Interface in Shock-Driven Inertial Confinement Implosions  

E-Print Network (OSTI)

. Wilks,2 A. Greenwood,4 and A. Nikroo4 1 Plasma Science and Fusion Center, Massachusetts Institute, California 94550, USA 3 Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 shocked inertial confinement fusion implosions of thin deuterated-plastic shells filled with 3 He gas

491

Shells of crabs like these may be the key to prolonging the life of microbial fuel cells that  

E-Print Network (OSTI)

sensors beneath the sea, according to a team of Penn State researchers. To produce energy, microbial fuel produce chitinous shells, many marine bacteria break down chitin. Marine energy sources are often placed drilling platforms and to monitor for pollution or contamination, such as that caused by red tide, in both

492

Improved Lithium Ion Behavior Properties of TiO2@Graphitic-like Carbon Core@Shell Nanostructure  

E-Print Network (OSTI)

Improved Lithium Ion Behavior Properties of TiO2@Graphitic-like Carbon Core@Shell Nanostructure Min Intercalation Electrochemistry Capacitance Lithium Ion batteries A B S T R A C T We demonstrate TiO2@graphitic on the electrode surface and enhanced lithium ion intercalation, leading to lower charge transfer resistance

Cao, Guozhong

493

A modified nuclear mass formula with a unified prescription for the shell and pairing corrections Haifei Zhang1  

E-Print Network (OSTI)

A modified nuclear mass formula with a unified prescription for the shell and pairing corrections Haifei Zhang1 , Jianmin Dong2 , Nana Ma1 , Hongfei Zhang1 , and Junqing Li1,2 1School of Nuclear Science Mines, 4 rue A. Kastler, 44307 Nantes Cedex 03,France A modified macroscopic-microscopic nuclear mass

Boyer, Edmond

494

Line formation in the inner winds of classical T Tauri stars: testing the conical-shell wind solution  

Science Journals Connector (OSTI)

......relatively high mass-accretion rate...2) a moderate mass-accretion rate...Fig. 1 shows the maps of density (rho), poloidal mass flux (phim rhov...of the poloidal velocity (v p), for both...conical-shell wind ( ) and the mass-loss......

Ryuichi Kurosawa; M. M. Romanova

2012-11-11T23:59:59.000Z

495

RETRACTED ARTICLE: Corrosion protection of steel sheets by chitosan from shrimp shells at acid pH  

Science Journals Connector (OSTI)

The corrosion behavior of mild steel (MS) sheets in 0.5 M H2SO4 in the presence of chitosan extracted from shrimp shells (CSS) has ... -electrolyte boundary. CSS is a mixed-type inhibitor and the shapes of Nyquis...

Ubong M. Eduok; Mazen M. Khaled

2014-10-01T23:59:59.000Z

496

Microfluidics for block polymer shells (DMR 0819860) SEED :H.A. Stone, R.A. Register and Janine Nunes  

E-Print Network (OSTI)

Microfluidics for block polymer shells (DMR 0819860) SEED :H.A. Stone, R.A. Register and Janine. We utilized microfluidic methods to investigate the role of geometric structures, e.g. thin spherical, microfluidic devices with two consecutive flow-focusing junctions were used to generate air bubble

Petta, Jason

497

Hawking Radiation Due to a Collapsing Star. II: Collapsing Shells in Two-Dimensional Space-Times  

Science Journals Connector (OSTI)

......particle with respect to the Schwarzschild geometry of .5...the shell are portions of Schwarzschild geometries. The mass parameter...points S +' and S.' are mirror-images of Q. and Q+ with...same as that of the eternal Schwarzschild black hole except that there......

Kousuke Shizume; Shin Takagi

1989-04-01T23:59:59.000Z