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1

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmitted forHighlightsSeminarsSiliconSite Map TUNL pdf's | FAS

2

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmitted forHighlightsSeminarsSiliconSite Map TUNL pdf's | FASSite-Selective

3

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systemsBi (2)Sharing Smartversatileplatform

4

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systemsBi (2)Sharing SmartversatileplatformSite-Selective Ionization in

5

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systemsBi (2)Sharing SmartversatileplatformSite-Selective Ionization

6

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systemsBi (2)Sharing SmartversatileplatformSite-Selective

7

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systemsBi (2)Sharing SmartversatileplatformSite-SelectiveSite-Selective

8

Factors Affecting the Fragmentation of Peptide Ions: Metal Cationization and Fragmentation Timescale  

E-Print Network [OSTI]

cation and in assessing differences in the fragmentation pattern as a result of this binding site. An interesting observation from these studies reveals abundant x-type fragment ions occurring from the fragmentation of alkali-metal cationized peptides...

Kmiec, Kevin

2012-10-19T23:59:59.000Z

9

Conversion, Fragmentation,  

E-Print Network [OSTI]

YFFReview Forestland Conversion, Fragmentation, and Parcelization A summary of a forum exploring our forests today. Development and economic pressures on private lands are driving conversion the complexity of factors influencing fragmentation--for example, historic land use planning policies

10

Site-Selective Ionization in Nanoclusters Affects Subsequent...  

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

structures, nanotubes, or two-dimensional graphene sheets. Researchers from Western Michigan University, Berkeley Lab, and other international research facilities...

11

Selectable fragmentation warhead  

SciTech Connect (OSTI)

This report discusses a selectable fragmentation warhead which is capable of producing a predetermined number of fragments from a metal plate, and accelerating the fragments toward a target. A first explosive located adjacent to the plate is detonated at selected number of points by laser-driven slapper detonators. In one embodiment, a smoother-disk and a second explosive, located adjacent to the first explosive, serve to increase acceleration of the fragments toward a target. The ability to produce a selected number of fragments allows for effective destruction of a chosen target.

Bryan, C.S.; Paisley, D.L.; Montoya, N.I.; Stahl, D.B.

1992-12-31T23:59:59.000Z

12

Gibbs fragmentation trees  

E-Print Network [OSTI]

We study fragmentation trees of Gibbs type. In the binary case, we identify the most general Gibbs type fragmentation tree with Aldous's beta-splitting model, which has an extended parameter range $\\beta>-2$ with respect to the ${\\rm Beta}(\\beta+1,\\beta+1)$ probability distributions on which it is based. In the multifurcating case, we show that Gibbs fragmentation trees are associated with the two-parameter Poisson-Dirichlet models for exchangeable random partitions of $\\bN$, with an extended parameter range $0\\le\\alpha\\le 1$, $\\theta\\ge -2\\alpha$ and $\\alpha<0$, $\\theta=-m\\alpha$, $m\\in\\bN$.

McCullagh, Peter; Winkel, Matthias

2007-01-01T23:59:59.000Z

13

Fragment capture device  

DOE Patents [OSTI]

A fragment capture device for use in explosive containment. The device comprises an assembly of at least two rows of bars positioned to eliminate line-of-sight trajectories between the generation point of fragments and a surrounding containment vessel or asset. The device comprises an array of at least two rows of bars, wherein each row is staggered with respect to the adjacent row, and wherein a lateral dimension of each bar and a relative position of each bar in combination provides blockage of a straight-line passage of a solid fragment through the adjacent rows of bars, wherein a generation point of the solid fragment is located within a cavity at least partially enclosed by the array of bars.

Payne, Lloyd R. (Los Lunas, NM); Cole, David L. (Albuquerque, NM)

2010-03-30T23:59:59.000Z

14

Fragments, Combustion and Earthquakes  

E-Print Network [OSTI]

This paper is devoted to show the advantages of introducing a geometric viewpoint and a non extensive formulation in the description of apparently unrelated phenomena: combustion and earthquakes. Here, it is shown how the introduction of a fragmentation analysis based on that formulation leads to find a common point for description of these phenomena

Oscar Sotolongo-Costa; Antonio Posadas

2005-03-16T23:59:59.000Z

15

Emission Characteristics of the Projectile Fragments at Relativistic Energy  

E-Print Network [OSTI]

A projectile (84^Kr_36) having kinetic energy around 1 A GeV was used to expose NIKFI BR-2 emulsion target. A total of 700 inelastic events are used in the present studies on projectile fragments. The emission angle of the projectile fragments are strongly affected by charge of the other projectile fragments emitted at same time with different emission angle is observed. The angular distribution studies show symmetrical nature for lighter charge projectile fragments. The symmetrical nature decreased with the charge of projectile fragments. At ~4o of emission angle for double charge projectile fragments, the momentum transfer during interaction is similar for various target species of emulsion were observed. We also observed a small but significant amplitude peaks on both side of the big peak for almost all light charge projectile fragments having different delta angle values. It reflects that there are few percent of projectile fragments that are coming from the decay of heavy projectile fragments or any other process.

M. K. Singh; A. K. Soma; Ramji Pathak; V. Singh

2011-08-01T23:59:59.000Z

16

Source shape determination with directional fragment-fragment velocity correlations  

E-Print Network [OSTI]

Correlation functions, constructed from directional projections of the relative velocities of fragments, are used to determine the shape of the breakup volume in coordinate space. For central collisions of 129Xe + natSn at 50 MeV per nucleon incident energy, measured with the 4pi multi-detector INDRA at GSI, a prolate shape aligned along the beam direction with an axis ratio of 1:0.7 is deduced. The sensitivity of the method is discussed in comparison with conventional fragment-fragment velocity correlations.

Lefčvre, A; Auger, G; Begemann-Blaich, M L; Bellaize, N; Bittiger, R; Bocage, F; Borderie, B; Bougault, R; Bouriquet, B; Charvet, J L; Chbihi, A; Dayras, R; Durand, D; Frankland, J D; Galíchet, E; Gourio, D; Guinet, D; Hudan, S; Lautesse, P; Lavaud, F; Legrain, R; López, O; Lukasik, J; Lynen, U; Müller, W F J; Nalpas, L; Orth, H; Plagnol, E; Rosato, E; Saija, A; Sfienti, C; Tamain, B; Trautmann, W; Trzcinski, A; Turzó, K; Vient, E; Vigilante, M; Volant, C; Zwieglinski, B

2008-01-01T23:59:59.000Z

17

The critical temperature of nuclear matter and fragment distributions in multifragmentation of finite nuclei  

E-Print Network [OSTI]

The fragment production in multifragmentation of finite nuclei is affected by the critical temperature of nuclear matter. We show that this temperature can be determined on the basis of the statistical multifragmentation model (SMM) by analyzing the evolution of fragment distributions with the excitation energy. This method can reveal a decrease of the critical temperature that, e.g., is expected for neutron-rich matter. The influence of isospin on fragment distributions is also discussed.

R. Ogul; A. S. Botvina

2002-10-15T23:59:59.000Z

18

A model for projectile fragmentation  

E-Print Network [OSTI]

A model for projectile fragmentation is developed whose origin can be traced back to the Bevalac era. The model positions itself between the phenomenological EPAX parametrization and microscopic transport models like "Heavy Ion Phase Space Exploration" (HIPSE) model and antisymmetrised molecular dynamics (AMD) model. A very simple impact parameter dependence of input temperature is incorporated in the model which helps to analyze the more peripheral collisions. The model is applied to calculate the charge, isotopic distributions, average number of intermediate mass fragments and the average size of largest cluster at different $Z_{bound}$ of different projectile fragmentation reactions at different energies.

Chaudhuri, G; Gupta, S Das

2012-01-01T23:59:59.000Z

19

The dynamics of fragment formation  

SciTech Connect (OSTI)

We demonstrate that in the Quantum Molecular Dynamics model, dynamical correlations can result in the production rate for final state nucleon clusters (and hence composite fragments) being higher than would be expected if statistics and the available phase space were dominant in determining composite formation. An intranuclear cascade or a Boltzmann-Uehling-Uhlenbeck model, combined with a statistical approach in the late stage of the collision to determine composites, provides an equivalent description only under limited conditions of centrality and beam energy. We use data on participant fragment production in Au + Au collisions in the Bevalac`s BOS time projection chamber to map out the parameter space where statistical clustering provides a good description. In particular, we investigate momentum-space densities of fragments up to {sup 4}He as a function of fragment transverse momentum, azimuth relative to the reaction plane, rapidity, multiplicity and beam energy.

Keane, D. [Kent State Univ., OH (United States); EOS Collaboration

1994-09-01T23:59:59.000Z

20

FRAGMENTATION IN THE FIRST GALAXIES  

SciTech Connect (OSTI)

Motivated by recent simulations of galaxy formation in which protogalaxies acquire their baryonic content through cold accretion, we study the gravitational fragmentation of cold streams flowing into a typical first galaxy. We use a one-zone hydrodynamical model to examine the thermal evolution of the gas flowing into a 10{sup 8} M{sub sun} dark matter halo at redshift z = 10. The goal is to gain an understanding of the expected fragmentation mass scale and thus the characteristic mass of the first population of stars to form by shock fragmentation. Our model accurately describes the chemical and thermal evolution of the gas as we are specifically concerned with how the chemical abundances and initial conditions of the low-density, metal-enriched, cold accretion streams that pass an accretion shock alter the cooling properties and tendency to fragment in the post-shock gas. Cold accretion flows are not shock heated at the virial radius but instead flow along high-baryonic-density filaments of the cosmic web and penetrate deep into the host halo of the protogalaxy. In this physical regime, if molecular cooling is absent because of a strong Lyman-Werner background, we find there to be a sharp drop in the fragmentation mass at a metallicity of Z {approx} 10{sup -4} Z{sub sun}. If, however, H{sub 2} and HD molecules are present, they dominate the cooling at T < 10{sup 4} K, and metallicity then has no effect on the fragmentation properties of the cold stream. For a solar abundance pattern of metallicity, O is the most effective metal coolant throughout the evolution, while for a pair instability supernova (PISN) metallicity yield, Si{sup +} is the most effective coolant. PISN abundance patterns also exhibit a slightly smaller critical metallicity. Dust grains are not included in our chemical model, but we argue that their inclusion would not significantly alter the results. We also find that this physical scenario allows for the formation of stellar clusters and large, 10{sup 4} M{sub sun} bound fragments, possibly the precursors to globular clusters and supermassive black holes. Finally, we conclude that the usual assumption of isobaricity for galactic shocks breaks down in gas of a sufficiently high metallicity, suggesting that metal cooling leads to thermal instabilities.

Safranek-Shrader, Chalence; Bromm, Volker; Milosavljevic, Milos [Department of Astronomy and Texas Cosmology Center, University of Texas at Austin, Austin, TX 78712 (United States)

2010-11-10T23:59:59.000Z

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

Early Imaging Correlates of Subsequent Motor Recovery after Stroke  

E-Print Network [OSTI]

Early Imaging Correlates of Subsequent Motor Recovery after Stroke Randolph S. Marshall, MS, MD days after stroke correlates with subsequent motor recovery. Methods: Twenty-three patients with hemiparesis after first-time stroke were scanned at 2.0 0.9 days while performing a simple motor task. We

22

Cumulative Probability of Blast Fragmentation Effect  

E-Print Network [OSTI]

This paper presents formulae for calculation of cumulative probability of effect made by blast fragments. Analysis with Mott distribution, discrete fragment enumeration, spatial non-uniformity, numerical issues, and a generalisation for a set of effects are also discussed.

Oleg Mazonka

2013-04-05T23:59:59.000Z

23

Cumulative Probability of Blast Fragmentation Effect  

E-Print Network [OSTI]

This paper presents formulae for calculation of cumulative probability of effect made by blast fragments. Analysis with Mott distribution, discrete fragment enumeration, spatial non-uniformity, numerical issues, and a generalisation for a set of effects are also discussed.

Mazonka, Oleg

2013-01-01T23:59:59.000Z

24

Fragmentation of suddenly heated liquids  

SciTech Connect (OSTI)

Fragmentation of free liquids in Inertial Confinement Fusion reactors could determine the upper bound on reactor pulse rate. The x-ray ablated materials must cool and recondense to allow driver beam propagation. The increased surface area caused by fragmentation will enhance the cooling and condensation rates. Relaxation from the suddenly heated state will move a liquid into the negative pressure region under the liquid-vapor P-V dome. The lithium equation of state was used to demonstrate that neutron-induced vaporization uses only a minor fraction of the added heat, much less than would be required to drive the expansion. A 77% expansion of the lithium is required before the rapid vaporization process of spinodal decomposition could begin, and nucleation and growth are too slow to contribute to the expansion.

Blink, J.A.

1985-03-01T23:59:59.000Z

25

Fission fragment excited laser system  

DOE Patents [OSTI]

A laser system and method for exciting lasing action in a molecular gas lasing medium which includes cooling the lasing medium to a temperature below about 150 K and injecting fission fragments through the lasing medium so as to preferentially excite low lying vibrational levels of the medium and to cause population inversions therein. The cooled gas lasing medium should have a mass areal density of about 5 .times. 10.sup.-.sup.3 grams/square centimeter, relaxation times of greater than 50 microseconds, and a broad range of excitable vibrational levels which are excitable by molecular collisions.

McArthur, David A. (Albuquerque, NM); Tollefsrud, Philip B. (Albuquerque, NM)

1976-01-01T23:59:59.000Z

26

The Formation and Fragmentation of Primordial Molecular Clouds  

E-Print Network [OSTI]

Many questions in physical cosmology regarding the thermal history of the intergalactic medium, chemical enrichment, reionization, etc. are thought to be intimately related to the nature and evolution of pregalactic structure. In particular the efficiency of primordial star formation and the primordial IMF are of special interest. We present results from high resolution three-dimensional adaptive mesh refinement simulations that follow the collapse of primordial molecular clouds and their subsequent fragmentation within a cosmologically representative volume. Comoving scales from 128 kpc down to 0.5 pc are followed accurately. Dark matter dynamics, hydrodynamics and all relevant chemical and radiative processes (cooling) are followed self-consistently for a cluster normalized CDM structure formation model. Primordial molecular clouds with ~100,000 solar masses are assembled by mergers of multiple objects that have formed hydrogen molecules in the gas phase with a fractional abundance of 100,000/cm^3 are found. We find that less than 1% of the primordial gas in such small scale structures cools and collapses to sufficiently high densities to be available for primordial star formation. Furthermore, our results indicate that the formation of very massive objects, massive black holes, fragmentation of a large fraction of baryons into brown dwars or Jupiter size fragments seems, in contrast to various claims in the literature, very unlikely. The expected escape fraction of UV photons with (h nu) > 11eV is very small.

Tom Abel; Greg L. Bryan; Michael L. Norman

1998-10-14T23:59:59.000Z

27

Fragmentation and flow in central collisions  

SciTech Connect (OSTI)

Investigation of the fragmentation mechanism requires the measurement of complicated observables. To identify what part of the reacting system gives rise to the fragments, it would be useful to tag them as participants or spectators. A large acceptance for all the reaction products and an event-by-event measurement of the fragment multiplicity is required to distinguish fragment formation via sequential emission from a large equilibrated system and multifragmentation. In order to address whether fragments are formed early or late in the collision, information about the dynamical evolution of the reaction is necessary. This can be provided by study of the global properties of the events. This paper discusses experimental techniques applicable to studying fragmentation processes. 25 refs., 8 figs.

Jacak, B.V.; Doss, K.G.R.; Gustafsson, H.A.; Gutbrod, H.; Harris, J.W.; Kampert, K.H.; Kolb, B.; Poskanzer, A.M.; Ritter, H.G.; Schmidt, H.R.

1987-01-01T23:59:59.000Z

28

Fragmentation Energetics of Clusters Relevant to Atmospheric...  

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

of Clusters Relevant to Atmospheric New Particle Formation. Fragmentation Energetics of Clusters Relevant to Atmospheric New Particle Formation. Abstract: The exact mechanisms by...

29

Energy solutions for CO2 emission peak and subsequent decline  

E-Print Network [OSTI]

Energy solutions for CO2 emission peak and subsequent decline Edited by Leif Sønderberg Petersen and Hans Larsen Risø-R-1712(EN) September 2009 Proceedings Risø International Energy Conference 2009 #12;Editors: Leif Sønderberg Petersen and Hans Larsen Title: Energy solutions for CO2 emission peak

30

The Formation and Fragmentation of Primordial Molecular Clouds  

E-Print Network [OSTI]

Many questions in physical cosmology regarding the thermal history of the intergalactic medium, chemical enrichment, reionization, etc. are thought to be intimately related to the nature and evolution of pregalactic structure. In particular the efficiency of primordial star formation and the primordial IMF are of special interest. We present results from high resolution three-dimensional adaptive mesh refinement simulations that follow the collapse of primordial molecular clouds and their subsequent fragmentation within a cosmologically representative volume. Comoving scales from 128 kpc down to 0.5 pc are followed accurately. Dark matter dynamics, hydrodynamics and all relevant chemical and radiative processes (cooling) are followed self-consistently for a cluster normalized CDM structure formation model. Primordial molecular clouds with ~100,000 solar masses are assembled by mergers of multiple objects that have formed hydrogen molecules in the gas phase with a fractional abundance of 11eV is very small.

Abel, T; Norman, M L; Abel, Tom; Bryan, Greg L.; Norman, Michael L.

1998-01-01T23:59:59.000Z

31

Nondetectability of restriction fragments and independence of DNA fragment sizes within and between loci in RFLP typing of DNA  

SciTech Connect (OSTI)

The authors provide experimental evidence showing that, during the restriction-enzyme digestion of DNA samples, some of the HaeIII-digested DNA fragments are small enough to prevent their reliable sizing on a Southern gel. As a result of such nondetectability of DNA fragments, individuals who show a single-band DNA profile at a VNTR locus may not necessarily be true homozygotes. In a population database, when the presence of such nondetectable alleles is ignored, they show that a pseudodependence of alleles within as well as across loci may occur. Using a known statistical method, under the hypothesis of independence of alleles within loci, they derive an efficient estimate of null allele frequency, which may be subsequently used for testing allelic independence within and across loci. The estimates of null allele frequencies, thus derived, are shown to agree with direct experimental data on the frequencies of HaeIII-null alleles. Incorporation of null alleles into the analysis of the forensic VNTR database suggests that the assumptions of allelic independence within and between loci are appropriate. In contrast, a failure to incorporate the occurrence of null alleles would provide a wrong inference regarding the independence of alleles within and between loci. 47 refs., 2 figs., 4 tabs.

Chakraborty, R.; Zhong, Y.; Jin, L. (Univ. of Texas Health Science Center, Houston, TX (United States)); Budowle, B. (FBI Academy, Quantico, VA (United States))

1994-08-01T23:59:59.000Z

32

Basophile: Accurate Fragment Charge State Prediction Improves...  

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

Accurate Fragment Charge State Prediction Improves Peptide Identification Rates."Genomics, Proteomics & Bioinformatics 11(2):86-95. doi:10.1016j.gpb.2012.11.004 Authors: D...

33

The NJL Model for Quark Fragmentation Functions  

SciTech Connect (OSTI)

A description of fragmentation functions which satisfy the momentum and isospin sum rules is presented in an effective quark theory. Concentrating on the pion fragmentation function, we first explain the reason why the elementary (lowest order) fragmentation process q ? q? is completely inadequate to describe the empirical data, although the “crossed” process ? ? qq describes the quark distribution functions in the pion reasonably well. Then, taking into account cascade-like processes in a modified jet-model approach, we show that the momentum and isospin sum rules can be satisfied naturally without introducing any ad-hoc parameters. We present numerical results for the Nambu-Jona-Lasinio model in the invariant mass regularization scheme, and compare the results with the empirical parametrizations. We argue that this NJL-jet model provides a very useful framework to calculate the fragmentation functions in an effective chiral quark theory.

T. Ito, W. Bentz, I. Cloet, A W Thomas, K. Yazaki

2009-10-01T23:59:59.000Z

34

Fragmented Economy, Stratified Society, and the Shattered Dream  

E-Print Network [OSTI]

Future of the California Economy is on the Coast, FebruaryMarch 17, 2010. Fragmented Economy, Stratified Society, andFragmented Economy, Stratified Society, and the Shattered

Mordechay, Kfir; Orfield, Gary

2011-01-01T23:59:59.000Z

35

Preubiquitinated chimeric ErbB2 is constitutively endocytosed and subsequently degraded in lysosomes  

SciTech Connect (OSTI)

The oncoprotein ErbB2 is endocytosis-deficient, probably due to its interaction with Heat shock protein 90. We previously demonstrated that clathrin-dependent endocytosis of ErbB2 is induced upon incubation of cells with Ansamycin derivatives, such as geldanamycin and its derivative 17-AAG. Furthermore, we have previously demonstrated that a preubiquitinated chimeric EGFR (EGFR-Ub{sub 4}) is constitutively endocytosed in a clathrin-dependent manner. We now demonstrate that also an ErbB2-Ub{sub 4} chimera is endocytosed constitutively and clathrin-dependently. Upon expression, the ErbB2-Ub{sub 4} was further ubiquitinated, and by Western blotting, we demonstrated the formation of both Lys48-linked and Lys63-linked polyubiquitin chains. ErbB2-Ub{sub 4} was constitutively internalized and eventually sorted to late endosomes and lysosomes where the fusion protein was degraded. ErbB2-Ub{sub 4} was not cleaved prior to internalization. Interestingly, over-expression of Ubiquitin Interaction Motif-containing dominant negative fragments of the clathrin adaptor proteins epsin1 and Eps15 negatively affected endocytosis of ErbB2. Altogether, this argues that ubiquitination is sufficient to induce clathrin-mediated endocytosis and lysosomal degradation of the otherwise plasma membrane localized ErbB2. Also, it appears that C-terminal cleavage is not required for endocytosis. -- Highlights: ? A chimera containing ErbB2 and a tetra-Ubiquitin chain internalizes constitutively. ? Receptor fragmentation is not required for endocytosis of ErbB2. ? Ubiquitination is sufficient to induce endocytosis and degradation of ErbB2. ? ErbB2-Ub4 is internalized clathrin-dependently.

Vuong, Tram Thu [Institute of Clinical Medicine, University of Oslo, Rikshospitalet, 0027 Oslo (Norway)] [Institute of Clinical Medicine, University of Oslo, Rikshospitalet, 0027 Oslo (Norway); Berger, Christian [Department of Pathology, Oslo University Hospital, Rikshospitalet, P.O. Box 4950 Nydalen, 0424 Oslo (Norway)] [Department of Pathology, Oslo University Hospital, Rikshospitalet, P.O. Box 4950 Nydalen, 0424 Oslo (Norway); Bertelsen, Vibeke; Rřdland, Marianne Skeie [Institute of Clinical Medicine, University of Oslo, Rikshospitalet, 0027 Oslo (Norway)] [Institute of Clinical Medicine, University of Oslo, Rikshospitalet, 0027 Oslo (Norway); Stang, Espen [Department of Pathology, Oslo University Hospital, Rikshospitalet, P.O. Box 4950 Nydalen, 0424 Oslo (Norway)] [Department of Pathology, Oslo University Hospital, Rikshospitalet, P.O. Box 4950 Nydalen, 0424 Oslo (Norway); Madshus, Inger Helene, E-mail: i.h.madshus@medisin.uio.no [Institute of Clinical Medicine, University of Oslo, Rikshospitalet, 0027 Oslo (Norway); Department of Pathology, Oslo University Hospital, Rikshospitalet, P.O. Box 4950 Nydalen, 0424 Oslo (Norway)

2013-02-01T23:59:59.000Z

36

Dynamical effects in the Coulomb expansion following nuclear fragmentation  

SciTech Connect (OSTI)

The effects of the Coulomb expansion on the fragment kinetic energy spectrum for a fragmentating hot nuclear system is investigated. In particular, /sup 12/C-fragment spectra are calculated and compared with those predicted by the uniform expansion approximation. The results indicate that the energy spectra of fragments are quite sensitive to the details of the Coulomb expansion treatment.

Chung, K.C.; Donangelo, R.; Schechter, H.

1987-09-01T23:59:59.000Z

37

DNA fragment sizing and sorting by laser-induced fluorescence  

DOE Patents [OSTI]

A method is provided for sizing DNA fragments using high speed detection systems, such as flow cytometry to determine unique characteristics of DNA pieces from a sample. In one characterization the DNA piece is fragmented at preselected sites to produce a plurality of DNA fragments. The DNA piece or the resulting DNA fragments are treated with a dye effective to stain stoichiometrically the DNA piece or the DNA fragments. The fluorescence from the dye in the stained fragments is then examined to generate an output functionally related to the number of nucleotides in each one of the DNA fragments. In one embodiment, the intensity of the fluorescence emissions from each fragment is linearly related to the fragment length. The distribution of DNA fragment sizes forms a characterization of the DNA piece for use in forensic and research applications.

Hammond, Mark L. (Angier, NC); Jett, James H. (Los Alamos, NM); Keller, Richard A. (Los Alamos, NM); Marrone, Babetta L. (Los Alamos, NM); Martin, John C. (Los Alamos, NM)

1996-01-01T23:59:59.000Z

38

New information on photon fragmentation functions  

E-Print Network [OSTI]

Thermal photons radiated in heavy-ion collisions represent an important signal for a recently discovered new state of matter, the deconfined quark-gluon plasma. However, a clean identification of this signal requires precise knowledge of the prompt photons produced simultaneously in hard collisions of quarks and gluons, mostly through their fragmentation. In this paper, we demonstrate that PHENIX data on photons produced in proton-proton collisions with low transverse momenta allow to extract new information on this fragmentation process. While existing data do not yet convincingly favor one parameterization (BFG II) over the two other frequently used photon fragmentation functions (BFG I and GRV NLO), the data sets recorded by PHENIX and STAR at BNL RHIC in 2013 with tenfold higher statistics should allow for such an analysis.

M. Klasen; F. König

2014-05-23T23:59:59.000Z

39

Fragmentation in central collisions of heavy systems  

SciTech Connect (OSTI)

One of the goals of heavy ion reaction studies is to understand the fragmentation of hot nuclei. The LBL/GSI Plastic Ball detector system has been used to achieve a very high solid angle for detection of light and medium-heavy fragments emitted in 200 Mev/A Au + Au and Au + Fe reactions. The simultaneous measurement of almost all of the nucleons and nuclei resulting from each collision allows an estimation of the total charged particle multiplicity and hence the impact parameter. By choosing subsets of the data corresponding to a peripheral or central collision, the assumptions inherent in various models of nuclear fragmentation can be tested. 3 refs., 3 figs.

Claesson, G.; Doss, K.G.R.; Ferguson, R.; Gavron, A.; Gustafsson, H.A.; Gutbrod, H.H.; Harris, J.W.; Jacak, B.V.; Kampert, K.H.; Kolb, B.

1987-01-01T23:59:59.000Z

40

1999 vadose zone monitoring plan and guidance for subsequent years  

SciTech Connect (OSTI)

The US Department of Energy`s Hanford Site has the most diverse and largest amounts of radioactive waste in the US. The majority of the liquid waste was disposed to the soil column where much of it remains today. This document provides the rationale and general framework for vadose zone monitoring at cribs, ditches, trenches and other disposal facilities to detect new sources of contamination and track the movement of existing contamination in the vadose zone for the protection of groundwater. The document provides guidance for subsequent site-specific vadose zone monitoring plans and includes a brief description of past vadose monitoring activities (Chapter 3); the results of the Data Quality Objective process used for this plan (Chapter 4); a prioritization of liquid waste disposal sites for vadose monitoring (Chapter 5 and Appendix B); a general Monitoring and Analysis Plan (Chapter 6); a general Quality Assurance Project Plan (Appendix A), and a description of vadose monitoring activities planned for FY 1999 (Appendix C).

Horton, D.G.; Reidel, S.P.; Last, G.V.

1998-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

Fragments' internal and kinetic temperatures in the framework of a Nuclear Statistical Multifragmentation Model  

E-Print Network [OSTI]

The agreement between the fragments' internal and kinetic temperatures with the breakup temperature is investigated using a Statistical Multifragmentation Model which makes no a priori as- sumption on the relationship between them. We thus examine the conditions for obtaining such agreement and find that, in the framework of our model, this holds only in a relatively narrow range of excitation energy. The role played by the qualitative shape of the fragments' state densities is also examined. Our results suggest that the internal temperature of the light fragments may be affected by this quantity, whose behavior may lead to constant internal temperatures over a wide excitation energy range. It thus suggests that the nuclear thermometry may provide valuable information on the nuclear state density.

S. R. Souza; B. V. Carlson; R. Donangelo; W. G. Lynch; M. B. Tsang

2014-11-27T23:59:59.000Z

42

Parton-to-Pion Fragmentation Reloaded  

E-Print Network [OSTI]

We present a new, comprehensive global analysis of parton-to-pion fragmentation functions at next-to-leading order accuracy in QCD. The obtained results are based on the latest experimental information on single-inclusive pion production in electron-positron annihilation, lepton-nucleon deep-inelastic scattering, and proton-proton collisions. An excellent description of all data sets is achieved, and the remaining uncertainties in parton-to-pion fragmentation functions are estimated based on the Hessian method. Extensive comparisons to the results from our previous global analysis are performed.

D. de Florian; R. Sassot; M. Epele; R. J. Hernandez-Pinto; M. Stratmann

2014-10-22T23:59:59.000Z

43

Finding Discriminative Molecular Fragments Christian Borgelt1  

E-Print Network [OSTI]

a novel molecule will be active or inactive, so that future chemical tests can be focused on the most molecular fragments to discriminate between active and inactive molecules. In this paper we review classifiers that predict for a novel molecule whether it will be active or inactive, for example, w

Borgelt, Christian

44

The Formation and Fragmentation of Primordial Molecular Clouds  

E-Print Network [OSTI]

Many questions in physical cosmology regarding the thermal history of the intergalactic medium, chemical enrichment, reionization, etc. are thought to be intimately related to the nature and evolution of pregalactic structure. In particular the efficiency of primordial star formation and the primordial IMF are of special interest. We present results from high resolution three--dimensional adaptive mesh refinement simulations that follow the collapse of primordial molecular clouds and their subsequent fragmentation within a cosmologically representative volume. Comoving scales from 128 kpc down to 1 pc are followed accurately. Dark matter dynamics, hydrodynamics and all relevant chemical and radiative processes (cooling) are followed self-consistently for a cluster normalized CDM structure formation model. Primordial molecular clouds with ~10^5 solar masses are assembled by mergers of multiple objects that have formed hydrogen molecules in the gas phase with a fractional abundance of ~10^-4. As the subclumps merge cooling lowers the temperature to ~200 Kelvin in a `cold pocket' at the center of the halo. Within this cold pocket, a quasi-hydrostatically contracting core with ~200 solar mass and number densities > 10^5 cm^-3 is found. We find that less than 1% of the primordial gas in such small scale structures cools and collapses to sufficiently high densities to be available for primordial star formation. Furthermore, it is worthwhile to note that this study achieved the highest dynamic range covered by structured adaptive mesh techniques in cosmological hydrodynamics to date.

Tom Abel; Greg L. Bryan; Michael L. Norman

2000-02-07T23:59:59.000Z

45

Fragment Mass Distribution of Platelike Objects  

SciTech Connect (OSTI)

The fragment mass distributions of platelike objects are investigated by conducting two types of experiments. The first is a {open_quotes}sandwich{close_quote}{close_quote} experiment in which thin glass and plaster plates are inserted between two larger stainless steel plates and an iron projectile is dropped onto the target plate at normal incidence. The second is a {open_quotes}lateral impact{close_quote}{close_quote} experiment in which a hypervelocity nylon projectile collides at the side of the plaster plates. There is a discrepancy in the power-law exponent of fragment mass distribution between the sandwich experiment and the lateral impact experiment. A model that agrees with the experimental results is proposed. {copyright} {ital 1997} {ital The American Physical Society}

Kadono, T. [Institute of Space and Astronautical Science, Kanagawa 229 (Japan)] [Institute of Space and Astronautical Science, Kanagawa 229 (Japan); [and Department of Physics, Kyoto University, Kyoto 606 (Japan)

1997-02-01T23:59:59.000Z

46

New results on jet fragmentation at CDF  

SciTech Connect (OSTI)

Presented are the latest results of jet fragmentation studies at the Tevatron using the CDF Run II detector. Studies include the distribution of transverse momenta (Kt) of particles jets, two-particle momentum correlations, and indirectly global event shapes in p{bar p} collisions. Results are discussed within the context of recent Next-to-Leading Log calculations as well as earlier experimental results from the Tevatron and e{sup +}e{sup -} colliders.

Jindariani, Sergo; /Florida U.

2006-12-01T23:59:59.000Z

47

Molecular electrostatic potentials by systematic molecular fragmentation  

SciTech Connect (OSTI)

A simple method is presented for estimating the molecular electrostatic potential in and around molecules using systematic molecular fragmentation. This approach estimates the potential directly from the electron density. The accuracy of the method is established for a set of organic molecules and ions. The utility of the approach is demonstrated by estimating the binding energy of a water molecule in an internal cavity in the protein ubiquitin.

Reid, David M.; Collins, Michael A. [Research School of Chemistry, Australian National University, Canberra, ACT 0200 (Australia)] [Research School of Chemistry, Australian National University, Canberra, ACT 0200 (Australia)

2013-11-14T23:59:59.000Z

48

Stroke Fragmentation based on Geometry Features and Hidden Markov Model  

E-Print Network [OSTI]

1 Stroke Fragmentation based on Geometry Features and Hidden Markov Model Guihuan Feng, Christian Viard-Gaudin, Technical Report, IRCCyN Nantes/IVC ABSTRACT Stroke fragmentation is one of the key steps in pen-based interaction. In this letter, we present a unified HMM-based stroke fragmentation technique

Paris-Sud XI, Université de

49

Computational Hydrocode Study of Target Damage due to Fragment-Blast Impact  

SciTech Connect (OSTI)

A target's terminal ballistic effects involving explosively generated fragments, along with the original blast, are of critical importance for many different security and safety related applications. Personnel safety and protective building design are but a few of the practical disciplines that can gain from improved understanding combined loading effects. Traditionally, any engineering level analysis or design effort involving explosions would divide the target damage analysis into two correspondingly critical areas: blast wave and fragment related impact effects. The hypothesis of this paper lies in the supposition that a linear combination of a blast-fragment loading, coupled with an accurate target response description, can lead to a non-linear target damage effect. This non-linear target response could then stand as the basis of defining what a synergistic or combined frag-blast loading might actually look like. The table below, taken from Walters, et. al. categorizes some of the critical parameters driving any combined target damage effect and drives the evaluation of results. Based on table 1 it becomes clear that any combined frag-blast analysis would need to account for the target response matching similar ranges for the mechanics described above. Of interest are the critical times upon which a blast event or fragment impact loading occurs relative to the target's modal response. A blast, for the purposes of this paper is defined as the sudden release of chemical energy from a given material (henceforth referred to as an energetic material) onto its surrounding medium. During the coupling mechanism a discrete or discontinuous shockwave is generated. This shockwave travels outward from the source transferring energy and momentum to any surrounding objects including personnel and engineering structures. From an engineering perspective blast effects are typically characterized by way of physical characteristics such as Peak Pressure (PP), Time of Arrival (TOA), Pressure-Impulse (PI) and Time of Duration (TD). Other peculiarities include the radial decrease in pressure from the source, any fireball size measurement, and subsequent increase in temperature from the passing of the shockwave through the surrounding medium. In light of all of these metrics, the loading any object receives from a blast event becomes intricately connected to the distance between itself and the source. Because of this, a clear distinction is made between close-in effects and those from a source far away from the object of interest. Explosively generated fragments on the other hand are characterized by means of their localized damage potential. Metrics such as whether the fragment penetrates or perforates a given object is quantified as well as other variables including fragment's residual velocity, % kinetic energy decrease, residual fragment mass and other exit criteria. A fragment launched under such violent conditions could easily be traveling at speeds in excess of 2500 ft/s. Given these speeds it is conceivable to imagine how any given fragment could deliver a concentrated load to a target and penetrates through walls, vehicles or even the protection systems of nearby personnel. This study will focus on the individual fragment-target impact event with the hopes of expanding it to eventually include statistical procedures. Since this is a modeling excursion into the combined frag-blast target damage effects the numerical methods used to frame this problem become important in-so-far as the simulations are done in a consistent manner. For this study a Finite-Element based Hydrocode solution called ALE3D (ALE=Arbitrary Lagrangian-Eulerian) was utilized. ALE3D is developed by Lawrence Livermore National Laboratory (Livermore, CA), and as this paper will show, successfully implemented a converged ALE formulation including as many of the different aspects needed to query the synergistic damage on a given target. Further information on the modeling setup is included.

Hatch-Aguilar, T; Najjar, F; Szymanski, E

2011-03-24T23:59:59.000Z

50

Kaon fragmentation function from NJL-jet model  

SciTech Connect (OSTI)

The NJL-jet model provides a sound framework for calculating the fragmentation functions in an effective chiral quark theory, where the momentum and isospin sum rules are satisfied without the introduction of ad hoc parameters [1]. Earlier studies of the pion fragmentation functions using the Nambu-Jona-Lasinio (NJL) model within this framework showed good qualitative agreement with the empirical parameterizations. Here we extend the NJL-jet model by including the strange quark. The corrections to the pion fragmentation function and corresponding kaon fragmentation functions are calculated using the elementary quark to quark-meson fragmentation functions from NJL. The results for the kaon fragmentation function exhibit a qualitative agreement with the empirical parameterizations, while the unfavored strange quark fragmentation to pions is shown to be of the same order of magnitude as the unfavored light quark's. The results of these studies are expected to provide important guidance for the analysis of a large variety of semi-inclusive data.

Matevosyan, Hrayr H.; Thomas, Anthony W. [CSSM, School of Chemistry and Physics, University of Adelaide, Adelaide SA 5005 (Australia); Bentz, Wolfgang [Department of Physics, School of Science, Tokai University, Hiratsuka-shi, Kanagawa 259-1292 (Japan)

2010-07-27T23:59:59.000Z

51

Collective flow properties of intermediate mass fragments and isospin effects in fragmentation at Fermi energies  

SciTech Connect (OSTI)

Within a microscopic transport model (Stochastic Mean Field) we analyze the collective flow properties associated to the intermediate mass fragments produced in nuclear fragmentation. We study the transverse and elliptic flow parameters for each rank in mass hierarchy. The results are plotted for {sup 124}Sn + {sup 124}Sn systems at an energy of 50AMeV and for an impact parameter b=4fm. The correlation with the dynamics of the isospin degree of freedom is also discussed and the results are presented for the same systems.

Baran, V.; Zus, R. [University of Bucharest, Faculty of Physics, P.O. Box MG-11, RO - 077125 Bucharest-Magurele (Romania); Colonna, M. [Laboratori Nazionali del Sud INFN, Catania (Italy); Di Toro, M. [Laboratori Nazionali del Sud INFN, Catania, Italy and Physics and Astronomy Department, University of Catania (Italy)

2013-11-13T23:59:59.000Z

52

TRANSVERSE POLARIZATION DISTRIBUTION AND FRAGMENTATION FUNCTIONS  

SciTech Connect (OSTI)

The authors discuss transverse polarization distribution and fragmentation functions, in particular, T-odd functions with transverse momentum dependence, which might be relevant for the description of single transverse spin asymmetries. The role of intrinsic transverse momentum in the expansion in inverse powers of the hard scale is elaborated upon. The sin {phi} single spin asymmetry in the process e {rvec p} {r_arrow} e{prime} {pi}{sup +} X as recently reported by the HERMES Collaboration is investigated, in particular, by using the bag model.

BOER,D.

2000-04-11T23:59:59.000Z

53

The effect of affect in advertising: can product preference be conditioned by background music?   

E-Print Network [OSTI]

The present experiment provides a recent replication of Gorn’ (1982) affective conditioning study, investigating the role of music-induced mood in advertising and its subsequent effect on product choice. As an extension ...

Stone, Katrina

2007-01-01T23:59:59.000Z

54

Charge Prediction of Lipid Fragments in Mass Spectrometry  

SciTech Connect (OSTI)

An artificial neural network is developed for predicting which fragment is charged and which fragment is neutral for lipid fragment pairs produced from a liquid chromatography tandem mass spectrometry simulation process. This charge predictor is integrated into software developed at PNNL for in silico spectra generation and identification of metabolites known as Met ISIS. To test the effect of including charge prediction in Met ISIS, 46 lipids are used which show a reduction in false positive identifications when the charge predictor is utilized.

Schrom, Brian T.; Kangas, Lars J.; Ginovska, Bojana; Metz, Thomas O.; Miller, John H.

2011-12-18T23:59:59.000Z

55

Factors Affecting Photosynthesis!  

E-Print Network [OSTI]

Factors Affecting Photosynthesis! Temperature Eppley (1972) Light Sverdrup's Critical Depth-493, but the general concept is still valid! ! #12;PB opt & Temperature! #12;Photosynthesis & Temperature! Remember: in the laboratory, we can measure photosynthesis versus irradiance (PvsE) and calculate Ek, Pmax, and alpha

Kudela, Raphael M.

56

In-Source Fragmentation and the Sources of Partially Tryptic...  

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

using three biological samples, including a standard protein mixture, a mouse brain tissue homogenate, and a mouse plasma sample. Since the in-source fragments of a...

57

aflp amplified fragment: Topics by E-print Network  

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

NOTE Shannon L. Datwyler,1,2 Environmental Sciences and Ecology Websites Summary: in Hemp and Marijuana (Cannabis sativa L.) According to Amplified Fragment Length...

58

Energetics and Dynamics of the Fragmentation Reactions of Protonated...  

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

Protonated Peptides Containing Methionine Sulfoxide or Aspartic Acid Energetics and Dynamics of the Fragmentation Reactions of Protonated Peptides Containing Methionine Sulfoxide...

59

Energetics and Dynamics of Fragmentation of Protonated Leucine...  

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

Leucine Enkephalin from Time-and Energy-Resolved Surface-Induced Energetics and Dynamics of Fragmentation of Protonated Leucine Enkephalin from Time-and Energy-Resolved...

60

Energetics and Dynamics of Peptide Fragmentation from Multiple...  

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

of peptides containing the LDIFSDF motif. Citation: Laskin J.2004."Energetics and Dynamics of Peptide Fragmentation from Multiple-Collision Activation and Surface-Induced...

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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 fragmentation of expanding shells III: Oligarchic accretion and the mass spectrum of fragments  

E-Print Network [OSTI]

We use SPH simulations to investigate the gravitational fragmentation of expanding shells through the linear and non--linear regimes. The results are analysed using spherical harmonic decomposition to capture the initiation of structure during the linear regime; the potential-based method of Smith et al. (2009) to follow the development of clumps in the mildly non-linear regime; and sink particles to capture the properties of the final bound objects during the highly non-linear regime. In the early, mildly non--linear phase of fragmentation, we find that the clump mass function still agrees quite well with the mass function predicted by the analytic model. However, the sink mass function is quite different, in the sense of being skewed towards high-mass objects. This is because, once the growth of a condensation becomes non-linear, it tends to be growing non-competitively from its own essentially separate reservoir; we call this Oligarchic Accretion.

Dale, James E; Smith, Rowan J; Whitworth, Anthony; Palous, Jan

2010-01-01T23:59:59.000Z

62

Partition of the total excitation energy between complementary fragments  

E-Print Network [OSTI]

Two methods of the total excitation energy (TXE) partition between complementary fission fragments (FF) are compared: one based on the "classical" hypothesis of prompt neutron emission from fully accelerated FF with both fragments having the same residual nuclear temperature distribution,the second one on the systematic behavior of the experimental multiplicity ratio {\

Manailescu, C; Hambsch, F -J; Morariu, C; Oberstedt, S

2011-01-01T23:59:59.000Z

63

Phenotypic Characterization of Self- Assembling Protein Fragments Using Negative Dominance  

E-Print Network [OSTI]

nonredundant E. coli protein fragments that could self-assemble when fused to the DNA-binding domain of the lambda cI repressor (Marino-Ramirez et al., 2004). The majority of these fragments contain the oligomerization domain of the protein, but lack...

Zweifel, Adrienne Elizabeth

2011-08-08T23:59:59.000Z

64

Large Scale Mining of Molecular Fragments with Wildcards  

E-Print Network [OSTI]

Large Scale Mining of Molecular Fragments with Wildcards Heiko Hofer1 , Christian Borgelt2 a novel molecule will be active or inactive, so that future chemical tests can be focused on the most molecular fragments to discriminate between active and inactive molecules. In this paper we present two

Borgelt, Christian

65

Biodiversity in fragmented landscapes: reviewing evidence on the effects of  

E-Print Network [OSTI]

Biodiversity in fragmented landscapes: reviewing evidence on the effects of landscape features contributing factors to the loss of biodiversity. The movement of individuals among small, isolated populations. In the previous Information Notes on `Evaluating biodiversity in fragmented landscapes' (Watts et al., 2005; Watts

66

Blast of light fragments from central heavy-ion collisions  

SciTech Connect (OSTI)

The effects of collective expansion on light-fragment emission from central heavy-ion collisions are studied by carrying out calculations in a transport model with dynamic production of {ital A}{le}3 fragments. Beam energies of few hundred MeV/nucleon are considered. In the simulations the formation of a region of dense excited nuclear matter is observed, which expands in transverse directions. The expansion is reflected in the angular distributions and in the mean transverse energies of emitted fragments. At the late stage of expansion the characteristic features of local thermodynamic equilibrium are identified. Different particles share nearly the same collective energy per nucleon, and nearly the same thermal energy. The calculated mean transverse energies of the fragments reflect the collective energy whose magnitude varies with impact parameter. However, the fragment energies only partially agree with available data. The calculated spectra exhibit different slopes at angles around c.m. 90{degree} in central reactions.

Danielewicz, P.; Pan, Q. (National Superconducting Cyclotron Laboratory, and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States))

1992-11-01T23:59:59.000Z

67

Optical selection and collection of DNA fragments  

DOE Patents [OSTI]

Optical selection and collection of DNA fragments. The present invention includes the optical selection and collection of large (>.mu.g) quantities of clonable, chromosome-specific DNA from a sample of chromosomes. Chromosome selection is based on selective, irreversible photoinactivation of unwanted chromosomal DNA. Although more general procedures may be envisioned, the invention is demonstrated by processing chromosomes in a conventional flow cytometry apparatus, but where no droplets are generated. All chromosomes in the sample are first stained with at least one fluorescent analytic dye and bonded to a photochemically active species which can render chromosomal DNA unclonable if activated. After passing through analyzing light beam(s), unwanted chromosomes are irradiated using light which is absorbed by the photochemically active species, thereby causing photoinactivation. As desired chromosomes pass this photoinactivation point, the inactivating light source is deflected by an optical modulator; hence, desired chromosomes are not photoinactivated and remain clonable. The selection and photoinactivation processes take place on a microsecond timescale. By eliminating droplet formation, chromosome selection rates 50 times greater than those possible with conventional chromosome sorters may be obtained. Thus, usable quantities of clonable DNA from any source thereof may be collected.

Roslaniec, Mary C. (Los Alamos, NM); Martin, John C. (Los Alamos, NM); Jett, James H. (Los Alamos, NM); Cram, L. Scott (Los Alamos, NM)

1998-01-01T23:59:59.000Z

68

The expansion of woody riparian vegetation, and subsequent stream restoration, influences the metabolism of prairie  

E-Print Network [OSTI]

The expansion of woody riparian vegetation, and subsequent stream restoration, influences, the restoration allowed recovery of some features of open-canopy prairie streams. Woody expansion apparently. Keywords: macroalgae, microalgae, primary production, restoration, streams Introduction North American

Dodds, Walter

69

Science based stockpile stewardship, uncertainty quantification, and fission fragment beams  

SciTech Connect (OSTI)

Stewardship of this nation's nuclear weapons is predicated on developing a fundamental scientific understanding of the physics and chemistry required to describe weapon performance without the need to resort to underground nuclear testing and to predict expected future performance as a result of intended or unintended modifications. In order to construct more reliable models, underground nuclear test data is being reanalyzed in novel ways. The extent to which underground experimental data can be matched with simulations is one measure of the credibility of our capability to predict weapon performance. To improve the interpretation of these experiments with quantified uncertainties, improved nuclear data is required. As an example, the fission yield of a device was often determined by measuring fission products. Conversion of the measured fission products to yield was accomplished through explosion code calculations (models) and a good set of nuclear reaction cross-sections. Because of the unique high-fluence environment of an exploding nuclear weapon, many reactions occurred on radioactive nuclides, for which only theoretically calculated cross-sections are available. Inverse kinematics reactions at CARIBU offer the opportunity to measure cross-sections on unstable neutron-rich fission fragments and thus improve the quality of the nuclear reaction cross-section sets. One of the fission products measured was {sup 95}Zr, the accumulation of all mass 95 fission products of Y, Sr, Rb and Kr (see Fig. 1). Subsequent neutron-induced reactions on these short lived fission products were assumed to cancel out - in other words, the destruction of mass 95 nuclides was more or less equal to the production of mass 95 nuclides. If a {sup 95}Sr was destroyed by an (n,2n) reaction it was also produced by (n,2n) reactions on {sup 96}Sr, for example. However, since these nuclides all have fairly short half-lives (seconds to minutes or even less), no experimental nuclear reaction cross-sections exist, and only theoretically modeled cross-sections are available. Inverse kinematics reactions at CARIBU offer the opportunity, should the beam intensity be sufficient, to measure cross-sections on a few important nuclides in order to benchmark the theoretical calculations and significantly improve the nuclear data. The nuclides in Fig. 1 are prioritized by importance factor and displayed in stoplight colors, green the highest and red the lowest priority.

Stoyer, M A; McNabb, D; Burke, J; Bernstein, L A; Wu, C Y

2009-09-14T23:59:59.000Z

70

Molecule fragmentation at the Dresden EBIS-A  

SciTech Connect (OSTI)

We report on molecule fragmentation measurements of propane in high dense electron beams of a room-temperature electron beam ion source, the so-called Dresden EBIS-A. After fragmentation of propane molecules in the electron beam the fragments were continuously extracted and q/A separated by a bifocal dipole magnet. Fragmentation spectra were measured at working gas pressures of 10{sup -9} mbar up to 10{sup -8} mbar, electron currents of 29 mA up to 75 mA, and electron energies of 11 keV up to 15 keV. Thereby all possible stoichiometric ratios of propane fragments were detected. At low electron beam currents the ion current output of the CH{sub x}{sup +} (x=0-3) and the C{sub 2}H{sub x}{sup +} (x=0-5) fragments is nearly identically. At higher electron currents the CH{sub x}{sup +} (x=0-3) peaks dominate the spectra and the ratio between the C{sup +} peak and CH{sub x}{sup +} (x=0-3) peaks increases from 2:1 to 3:1. It was shown that the working gas pressure has no significant influence on the fragment distribution but on the total ion current.

Kreller, M.; Zschornack, G.; Kentsch, U.; Heller, R. [Institute of Applied Physics, Dresden University of Technology, 01062 Dresden (Germany); DREEBIT GmbH, 01109 Dresden (Germany); FZ Dresden-Rossendorf, Institute of Ion-Beam Physics and Materials Research, 01328 Dresden (Germany)

2008-02-15T23:59:59.000Z

71

REVISING FOR CLARITY SENTENCE FRAGMENTS, RUN-ON SENTENCES, AND PARALLELISM  

E-Print Network [OSTI]

writing include sentence fragments, run-on sentences, non-parallel sentence construction, and poor word of words is incomprehensible. Fragment: Went to class. Sentence: Lisa installs her exhibit. Fragment: Lisa

Boonstra, Rudy

72

The movement ecology and dynamics of plant communities in fragmented landscapes.  

SciTech Connect (OSTI)

A conceptual model of movement ecology has recently been advanced to explain all movement by considering the interaction of four elements: internal state, motion capacity, navigation capacities,and external factors. We modified this framework togenerate predictions for species richness dynamics of fragmented plant communities and tested them in experimental landscapes across a 7-year time series. We found that two external factors, dispersal vectors and habitat features, affected species colonization and recolonization in habitat fragments and their effects varied and depended on motion capacity. Bird-dispersed species richness showed connectivity effects that reached an asymptote over time, but no edge effects, whereas wind-dispersed species richness showed steadily accumulating edge and connectivity effects, with no indication of an asymptote. Unassisted species also showed increasing differences caused by connectivity over time,whereas edges had no effect. Our limited use of proxies for movement ecology (e.g., dispersal mode as a proxy for motion capacity) resulted in moderate predictive power for communities and, in some cases, highlighted the importance of a more complete understanding of movement ecology for predicting how landscape conservation actions affect plant community dynamics.

Damschen, Ellen, I.; Brudvig, Lars, A.; Haddad, Nick, M.; Levey, Douglas, J.; Orrock, John, L.; Tewlsbury, Joshua, J.

2008-12-01T23:59:59.000Z

73

Analyzing Unfavored Fragmentation Functions Using NJL-Jet Model  

SciTech Connect (OSTI)

The Nambu-Jona-Lasinio (NJL)-jet model provides a sound framework for calculating the fragmentation functions in an effective chiral quark theory, where the momentum and isospin sum rules are satisfied without the introduction of ad hoc parameters. The most recent version of the model includes the fragmentation of the light and strange quarks to pions, kaons, nucleons, and antinucleons; where the effects of the production of secondary pions and kaons from the vector mesons {rho}, K* and {phi} are also calculated. The results for the model fragmentation function exhibit a qualitative agreement with the empirical parameterizations. The results also allow to test, within the model assumptions, several assumption in parametrizations of the unfavored fragmentation functions used in empirical fits to the experimental data.

Matevosyan, Hrayr H.; Thomas, Anthony W. [CSSM, School of Chemistry and Physics, University of Adelaide, Adelaide SA 5005 (Australia); Bentz, Wolfgang [Department of Physics, School of Science, Tokai University, Hiratsuka-shi, Kanagawa 259-1292 (Japan)

2011-10-24T23:59:59.000Z

74

NJL-jet model for quark fragmentation functions  

SciTech Connect (OSTI)

A description of fragmentation functions which satisfy the momentum and isospin sum rules is presented in an effective quark theory. Concentrating on the pion fragmentation function, we first explain why the elementary (lowest order) fragmentation process q{yields}q{pi} is completely inadequate to describe the empirical data, although the crossed process {pi}{yields}qq describes the quark distribution functions in the pion reasonably well. Taking into account cascadelike processes in a generalized jet-model approach, we then show that the momentum and isospin sum rules can be satisfied naturally, without the introduction of ad hoc parameters. We present results for the Nambu-Jona-Lasinio (NJL) model in the invariant mass regularization scheme and compare them with the empirical parametrizations. We argue that the NJL-jet model, developed herein, provides a useful framework with which to calculate the fragmentation functions in an effective chiral quark theory.

Ito, T.; Bentz, W. [Department of Physics, School of Science, Tokai University, Hiratsuka-shi, Kanagawa 259-1292 (Japan); Cloeet, I. C. [Department of Physics, University of Washington, Seattle, Washington 98195-1560 (United States); Thomas, A. W. [Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606 (United States) and College of William and Mary, Williamsburg, Virginia 23187 (United States); Yazaki, K. [Radiation Laboratory, Nishina Accelerator Research Center, RIKEN, Wako, Saitama 351-0198 (Japan)

2009-10-01T23:59:59.000Z

75

Conservation of Isospin in Neutron-Rich Fission Fragments  

E-Print Network [OSTI]

On the occasion of the $75^{th}$ anniversary of the fission phenomenon, we present a surprisingly simple result which highlights the important role of isospin and its conservation in neutron rich fission fragments. We have analysed the fission fragment mass distribution from two recent heavy-ion reactions $^{238}$U($^{18}$O,f) and $^{208}$Pb($^{18}$O,f) as well as a thermal neutron fission reaction $^{245}$Cm(n$^{th}$,f). We find that the conservation of the total isospin explains the overall trend in the observed relative yields of fragment masses in each fission pair partition. The isospin values involved are very large making the effect dramatic. The findings open the way for more precise calculations of fission fragment distributions in heavy nuclei and may have far reaching consequences for the drip line nuclei, HI fusion reactions, and calculation of decay heat in the fission phenomenon.

Ashok Kumar Jain; Deepika Choudhury; Bhoomika Maheshwari

2014-08-11T23:59:59.000Z

76

E-Print Network 3.0 - amplified fragment lenght Sample Search...  

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

Leiden Summary: Bioinformatics: Fragment Assembly Walter Kosters, Universiteit Leiden IPA... --Algorithms&Complexity, 29.6.2007 www.liacs.nlhomekosters 1 12;Fragment...

77

E-Print Network 3.0 - avian habitat fragmentation Sample Search...  

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

OF HABITAT FRAGMENTATION ON BIODIVERSITY Lenore Fahrig Ottawa-Carleton Institute... , landscape complementation s Abstract The literature on effects of habitat fragmentation on...

78

Impacts of habitat fragmentation on neotropical migrants in east Texas  

E-Print Network [OSTI]

OF SCIENCE December 1996 Major Subject: Wildlife and Fisheries Sciences IMPACTS OF HABITAT FRAGMENTATION ON NEOTROPICAL MIGRANTS IN EAST TEXAS A Thesis by ALIX DENISE DOWLING Submitted to Texas ARM University in partial fulfillment... and Fisheries Sciences ABSTRACT Impacts of Habitat Fragmentation on Neotropical Migrants in East Texas. (December 1996) Alix Denise Dowling, B. S. , Indiana University Chair of Advisory Committee: Dr. I&eith Arnold In this study, point counts were used...

Dowling, Alix Denise

1996-01-01T23:59:59.000Z

79

Basophile: Accurate Fragment Charge State Prediction Improves Peptide Identification Rates  

SciTech Connect (OSTI)

In shotgun proteomics, database search algorithms rely on fragmentation models to predict fragment ions that should be observed for a given peptide sequence. The most widely used strategy (Naive model) is oversimplified, cleaving all peptide bonds with equal probability to produce fragments of all charges below that of the precursor ion. More accurate models, based on fragmentation simulation, are too computationally intensive for on-the-fly use in database search algorithms. We have created an ordinal-regression-based model called Basophile that takes fragment size and basic residue distribution into account when determining the charge retention during CID/higher-energy collision induced dissociation (HCD) of charged peptides. This model improves the accuracy of predictions by reducing the number of unnecessary fragments that are routinely predicted for highly-charged precursors. Basophile increased the identification rates by 26% (on average) over the Naive model, when analyzing triply-charged precursors from ion trap data. Basophile achieves simplicity and speed by solving the prediction problem with an ordinal regression equation, which can be incorporated into any database search software for shotgun proteomic identification.

Wang, Dong; Dasari, Surendra; Chambers, Matthew C.; Holman, Jerry D.; Chen, Kan; Liebler, Daniel; Orton, Daniel J.; Purvine, Samuel O.; Monroe, Matthew E.; Chung, Chang Y.; Rose, Kristie L.; Tabb, David L.

2013-04-08T23:59:59.000Z

80

Cell-to-cell variability and culture conditions during self-renewal reversibly affect subsequent differentiation of mouse embryonic stem cells  

E-Print Network [OSTI]

Cell-to-cell variability in clonal populations is reflected in a distribution of mRNA and protein levels among individual cells, including those of key transcription factors governing embryonic stem cell (ESC) pluripotency ...

Tan, Jit Hin

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

Effects of phosphorus implantation and subsequent growth on diamond Euo Sik Choa,*, Cheon An Leea  

E-Print Network [OSTI]

]. Espe- cially, polycrystalline diamond films grown by microwave plasma chemical vapor deposition (MPCVD, and their fabrication is easy and economical. Polycrystalline diamond film has a rough surface and a lot of defectsEffects of phosphorus implantation and subsequent growth on diamond Euo Sik Choa,*, Cheon An Leea

Lee, Jong Duk

82

Research Report Effects of ethanol consumption by adult female rats on subsequent  

E-Print Network [OSTI]

Research Report Effects of ethanol consumption by adult female rats on subsequent consumption January 2004 Abstract We used a two-bottle choice test to measure voluntary ethanol consumption by adolescent rats that had lived with ethanol-consuming or water-consuming adult conspecifics. We found

Galef Jr., Bennett G.

83

Method of freezing living cells and tissues with improved subsequent survival  

DOE Patents [OSTI]

This invention relates to an improved method for freezing red blood cells, ther living cells, or tissues with improved subsequent survival, wherein constant-volume freezing is utilized that results in significantly improved survival compared with constant-pressure freezing; optimization is attainable through the use of different vessel geometries, cooling baths and warming baths, and sample concentrations.

Senkan, Selim M. (Oak Ridge, TN); Hirsch, Gerald P. (Oak Ridge, TN)

1980-01-01T23:59:59.000Z

84

Sugar yields from dilute sulfuric acid and sulfur dioxide pretreatments and subsequent enzymatic hydrolysis of switchgrass  

E-Print Network [OSTI]

Sugar yields from dilute sulfuric acid and sulfur dioxide pretreatments and subsequent enzymatic Dilute sulfuric acid Sulfur dioxide Biofuels Switchgrass a b s t r a c t Dacotah switchgrass was pretreated with sulfuric acid concentrations of 0.5, 1.0, and 2.0 wt.% at 140, 160, and 180 °C and with 1

California at Riverside, University of

85

Effect of long-term underfeeding and subsequent refeeding on hay digestibility in sheep  

E-Print Network [OSTI]

Effect of long-term underfeeding and subsequent refeeding on hay digestibility in sheep R Perrier Decreasing the level of intake generally increases diet digestibility, mainly because of an increase in particle retention time in the rumen (Galyean and Owens, 1991, in Physiological Aspects of Digestion

Paris-Sud XI, Université de

86

Survival of Bundleless Hair Cells and Subsequent Bundle Replacement in the Bullfrog's Saccule  

E-Print Network [OSTI]

Survival of Bundleless Hair Cells and Subsequent Bundle Replacement in the Bullfrog's Saccule and balance depend upon hair cells, the sensory receptors of the inner ear. Millions of people suffer from hearing and balance deficits caused by damage to hair cells as a result of exposure to noise

87

EXPERIMENT AND NEURAL NETWORK MODEL OF PRIMARY FRAGMENTATION OF OIL SHALE IN FLUIDIZED BED  

E-Print Network [OSTI]

that the fluidized bed temperature is an important factor of primary fragmentation of oil shale, and

Zhigang Cui; Xiangxin Han; Xiumin Jiang; Jianguo Liu

88

Radioisotope thermoelectric generator/thin fragment impact test  

SciTech Connect (OSTI)

The General-Purpose Heat Source (GPHS) provides power for space missions by transmitting the heat of {sup 238}Pu decay to an array of thermoelectric elements in a radioisotope thermoelectric generator (RTG). Because the potential for a launch abort or return from orbit exists for any space mission, the heat source response to credible accident scenarios is being evaluated. This test was designed to provide information on the response of a loaded RTG to impact by a fragment similar to the type of fragment produced by breakup of the spacecraft propulsion module system (PMS). The results of this test indicated that impact of the RTG by a thin aluminum fragment traveling at 306 m/s may result in significant damage to the converter housing, failure of one fueled clad, and release of a small quantity of fuel.

Reimus, M. A. H.; Hinckley, J. E. [Los Alamos National Laboratory, P.O. Box 1663, MS-E502, Los Alamos, New Mexico 87545 (United States)

1998-01-15T23:59:59.000Z

89

Radioisotope thermoelectric generator/thin fragment impact test  

SciTech Connect (OSTI)

The General-Purpose Heat Source (GPHS) provides power for space missions by transmitting the heat of {sup 238}Pu decay to an array of thermoelectric elements in a radioisotope thermoelectric generator (RTG). Because the potential for a launch abort or return from orbit exists for any space mission, the heat source response to credible accident scenarios is being evaluated. This test was designed to provide information on the response of a loaded RTG to impact by a fragment similar to the type of fragment produced by breakup of the spacecraft propulsion module system (PMS). The results of this test indicated that impact of the RTG by a thin aluminum fragment traveling at 306 m/s may result in significant damage to the converter housing, failure of one fueled clad, and release of a small quantity of fuel. {copyright} {ital 1998 American Institute of Physics.}

Reimus, M.A.; Hinckley, J.E. [Los Alamos National Laboratory, P.O. Box 1663, MS-E502, Los Alamos, New Mexico 87545 (United States)

1998-01-01T23:59:59.000Z

90

Sputtering yield of Pu bombarded by fission Fragments from Cf  

SciTech Connect (OSTI)

We present results on the yield of sputtering of Pu atoms from a Pu foil, bombarded by fission fragments from a {sup 252}Cf source in transmission geometry. We have found the number of Pu atoms/incoming fission fragments ejected to be 63 {+-} 1. In addition, we show measurements of the sputtering yield as a function of distance from the central axis, which can be understood as an angular distribution of the yield. The results are quite surprising in light of the fact that the Pu foil is several times the thickness of the range of fission fragment particles in Pu. This indicates that models like the binary collision model are not sufficient to explain this behavior.

Danagoulian, Areg [Los Alamos National Laboratory; Klein, Andreas [Los Alamos National Laboratory; Mcneil, Wendy V [Los Alamos National Laboratory; Yuan, Vincent W [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

91

Apparatus and method for producing fragment-free openings  

DOE Patents [OSTI]

An apparatus and method for explosively penetrating hardened containers such as steel drums without producing metal fragmentation is disclosed. The apparatus can be used singularly or in combination with water disrupters and other disablement tools. The apparatus is mounted in close proximity to the target and features a main sheet explosive that is initiated at least three equidistant points along the sheet's periphery. A buffer material is placed between the sheet explosive and the target. As a result, the metallic fragments generated from the detonation of the detonator are attenuated so that no fragments from the detonator are transferred to the target. As a result, an opening can be created in containers such as steel drums through which access to the IED is obtained to defuse it with projectiles or fluids.

Cherry, Christopher R. (Albuquerque, NM)

2001-01-01T23:59:59.000Z

92

Radioisotope thermoelectric generator/thin fragment impact test  

SciTech Connect (OSTI)

The General-Purpose Heat Source (GPHS) provides power for space missions by transmitting the heat of {sup 238}Pu decay to an array of thermoelectric elements in a radioisotope thermoelectric generator (RTG). Because the potential for a launch abort or return from orbit exists for any space mission, the heat source response to credible accident scenarios is being evaluated. This test was designed to provide information on the response of a loaded RTG to impact by a fragment similar to the type of fragment produced by breakup of the spacecraft propulsion module system (PMS). The results of this test indicated that impact of the RTG by a thin aluminum fragment traveling at 306 m/s may result in significant damage to the convertor housing, failure of one fueled clad, and release of a small quantity of fuel.

Reimus, M.A.H.; Hinckley, J.E.

1998-12-31T23:59:59.000Z

93

Equilibrium and non-equilibrium emission of complex fragments  

SciTech Connect (OSTI)

Complex fragment emission (Z{gt}2) has been studied in the reactions of 50, 80, and 100 MeV/u {sup 139}La + {sup 12}C, and 80 MeV/u {sup 139}La + {sup 27}Al, {sup nat}Cu, and {sup 197}Au. Charge, angle, and energy distributions were measured inclusively and in coincidence with other complex fragments, and were used to extract the source rapidities, velocity distributions, and cross sections. The experimental emission velocity distributions, charge loss distributions, and cross sections have been compared with calculations based on statistical compound nucleus decay. The binary signature of the coincidence events and the sharpness of the velocity distributions illustrate the primarily 2-body nature of the {sup 139}La + {sup 12}C reaction mechanism between 50 and 100 MeV/u. The emission velocities, angular distributions, and absolute cross sections of fragments of 20{le}Z{le}35 at 50 MeV/u, 19{le}Z{le}28 at 80 MeV/u, and 17{le}Z{le}21 at 100 MeV/u indicate that these fragments arise solely from the binary decay of compound nuclei formed in incomplete fusion reactions in which the {sup 139}La projectile picks up about one-half of the {sup 12}C target. In the 80 MeV/u {sup 139}La + {sup 27}Al, {sup nat}Cu, and {sup 197}Au reactions, the disappearance of the binary signature in the total charge and velocity distributions suggests and increase in the complex fragment and light charged particle multiplicity with increasing target mass. As in the 80 and 100 MeV/u {sup 139}La + {sup 12}C reactions, the lighter complex fragments exhibit anisotropic angular distributions and cross sections that are too large to be explained exclusively by statistical emission. 143 refs., 67 figs.

Bowman, D.R.

1989-08-01T23:59:59.000Z

94

Compatibility of various approaches to heavy-quark fragmentation  

E-Print Network [OSTI]

We find that the definition of the heavy-quark fragmentation function given by Jaffe and Randall differs by a factor of the longitudinal-momentum fraction z from the standard Collins-Soper definition. Once this factor is taken into account, the explicit calculation of Braaten et al. is found to be in agreement with the general analysis of Jaffe and Randall. We also examine the model of Peterson et al. for heavy-quark fragmentation and find that the quoted values of the width and of the value of $z$ at the maximum are in error. The corrected values are in agreement with the analysis of Jaffe and Randall.

G. T. Bodwin; B. W. Harris

2000-12-05T23:59:59.000Z

95

ANALYSIS OF A FRAGMENTING SUNSPOT USING HINODE OBSERVATIONS  

SciTech Connect (OSTI)

We employ high-resolution filtergrams and polarimetric measurements from Hinode to follow the evolution of a sunspot for eight days starting on 2007 June 28. The imaging data were corrected for intensity gradients, projection effects, and instrumental stray light prior to the analysis. The observations show the formation of a light bridge at one corner of the sunspot by a slow intrusion of neighboring penumbral filaments. This divided the umbra into two individual umbral cores. During the light bridge formation, there was a steep increase in its intensity from 0.28 to 0.7 I{sub QS} in nearly 4 hr, followed by a gradual increase to quiet-Sun (QS) values in 13 hr. This increase in intensity was accompanied by a large reduction in the field strength from 1800 G to 300 G. The smaller umbral core gradually broke away from the parent sunspot nearly two days after the formation of the light bridge, rendering the parent spot without a penumbra at the location of fragmentation. The penumbra in the fragment disappeared first within 34 hr, followed by the fragment whose area decayed exponentially with a time constant of 22 hr. In comparison, the parent sunspot area followed a linear decay rate of 0.94 Mm{sup 2} hr{sup -1}. The depleted penumbra in the parent sunspot regenerated when the inclination of the magnetic field at the penumbra-QS boundary became within 40 Degree-Sign from being completely horizontal and this occurred near the end of the fragment's lifetime. After the disappearance of the fragment, another light bridge formed in the parent which had similar properties as the fragmenting one, but did not divide the sunspot. The significant weakening in field strength in the light bridge along with the presence of granulation is suggestive of strong convection in the sunspot, which might have triggered the expulsion and fragmentation of the smaller spot. Although the presence of QS photospheric conditions in sunspot umbrae could be a necessary condition for fragmentation, it is not a sufficient one.

Louis, Rohan E.; Mathew, Shibu K.; Raja Bayanna, A.; Venkatakrishnan, P. [Udaipur Solar Observatory, Physical Research Laboratory Dewali, Badi Road, Udaipur, Rajasthan 313004 (India); Ravindra, B. [Indian Institute of Astrophysics, II Block, Koramangla, Bangalore 560034 (India); Bellot Rubio, Luis R., E-mail: rlouis@aip.de [Instituto de Astrofisica de Andalucia (CSIC), Apartado de Correos 3004, 18080 Granada (Spain)

2012-08-10T23:59:59.000Z

96

Symmetry energy from fragment observables in the canonical thermodynamic model  

E-Print Network [OSTI]

Different formulas relying measurable fragment isotopic observables to the symmetry energy of excited nuclei have been proposed and applied to the analysis of heavy ion collision data in the recent literature. In this paper we examine the quality of the different expressions in the framework of the McGill Canonical Thermodynamic Model. We show that even in the idealized situation of canonical equilibrium and in the absence of secondary decay, these formulas do not give a precise reconstruction of the symmetry energy of the fragmenting source. However, both isotopic widths and isoscaling appear very well correlated to the physical symmetry energy.

G. Chaudhuri; F. Gulminelli; S. Das Gupta

2009-10-19T23:59:59.000Z

97

Nerve agent intoxication: Recent neuropathophysiological findings and subsequent impact on medical management prospects  

SciTech Connect (OSTI)

This manuscript provides a survey of research findings catered to the development of effective countermeasures against nerve agent poisoning over the past decade. New neuropathophysiological distinctive features as regards organophosphate (OP) intoxication are presented. Such leading neuropathophysiological features include recent data on nerve agent-induced neuropathology, related peripheral or central nervous system inflammation and subsequent angiogenesis process. Hence, leading countermeasures against OP exposure are down-listed in terms of pre-treatment, protection or decontamination and emergency treatments. The final chapter focuses on the description of the self-repair attempt encountered in lesioned rodent brains, up to 3 months after soman poisoning. Indeed, an increased proliferation of neuronal progenitors was recently observed in injured brains of mice subjected to soman exposure. Subsequently, the latter experienced a neuronal regeneration in damaged brain regions such as the hippocampus and amygdala. The positive effect of a cytokine treatment on the neuronal regeneration and subsequent cognitive behavioral recovery are also discussed in this review. For the first time, brain cell therapy and neuronal regeneration are considered as a valuable contribution towards delayed treatment against OP intoxication. To date, efficient delayed treatment was lacking in the therapeutic resources administered to patients contaminated by nerve agents. - Highlights: > This review focuses on neuropathophysiology following nerve agent poisoning in mice. > Extensive data on long-term neuropathology and related inflammation are provided here. > Delayed self-repair attempts encountered in lesioned rodent brains are also described. > Cell therapy is considered as a valuable treatment against nerve agent intoxication.

Collombet, Jean-Marc, E-mail: jmcollombet@imassa.fr

2011-09-15T23:59:59.000Z

98

Fragment transition density method to calculate electronic coupling for excitation energy transfer  

SciTech Connect (OSTI)

A general approach, the Fragment Transition Density (FTD) scheme, is introduced to estimate electronic coupling for excitation energy transfer in a molecular system. Within this method, the excitation energies and transition densities of the system are used to derive the coupling matrix element. The scheme allows one to treat systems where exciton donor and acceptor are close together and their exchange interaction and orbital overlap are significant. The FTD method can be applied in combination with any quantum mechanical approach to treat excited states of general nature including single-, double-, and higher excitations. Using FTD approach, we derive excitonic couplings for several systems computed with the CIS, TD DFT and MS-CASPT2 methods. In particular, it is shown that the estimated coupling values in DNA ?-stacks are strongly affected by the short-range electronic interaction of adjacent nucleobases.

Voityuk, Alexander A., E-mail: alexander.voityuk@icrea.cat [Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain and Institut de Química Computacional i Catŕlisi (IQCC), Universitat de Girona 17071 Girona (Spain)

2014-06-28T23:59:59.000Z

99

Unsaturated hydraulic conductivity function based on a soil fragmentation process  

E-Print Network [OSTI]

Unsaturated hydraulic conductivity function based on a soil fragmentation process Shmuel Assouline-parameter expression for relative hydraulic conductivity (RHC) of partially saturated soils. It is based on the premise. This assumption allows us to derive hydraulic properties of soils (water retention curves and unsaturated

Tartakovsky, Daniel M.

100

Hierarchical Protein Folding Pathways: A Computational Study of Protein Fragments  

E-Print Network [OSTI]

Hierarchical Protein Folding Pathways: A Computational Study of Protein Fragments Nurit Haspel,1 folding model. The model postulates that protein folding is a hierarchical top-down pro- cess. The basic words: protein folding; building blocks; pro- tein structure prediction; hierarchical folding; protein

Haspel, Nurit

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

Mining Molecular Fragments: Finding Relevant Substructures of Molecules  

E-Print Network [OSTI]

­known National Cancer Institute's HIV­screening dataset. 1. Introduction Many data mining tasks in bioinformaticsMining Molecular Fragments: Finding Relevant Substructures of Molecules Christian Borgelt School in a set of molecules that help to discriminate between different classes of, for instance, activity

Borgelt, Christian

102

Molecular Fragment Mining for Drug Discovery Christian Borgelt1  

E-Print Network [OSTI]

Molecular Fragment Mining for Drug Discovery Christian Borgelt1 , Michael R. Berthold2 , and David will be active or inactive, so that future chemical tests can be focused on the most promis- ing candidates that discriminate between active and inactive molecules. In this paper we review this approach as well as two

Berthold, Michael R.

103

Mining Molecular Fragments: Finding Relevant Substructures of Molecules  

E-Print Network [OSTI]

-known National Cancer Institute's HIV-screening dataset. 1. Introduction Many data mining tasks in bioinformaticsMining Molecular Fragments: Finding Relevant Substructures of Molecules Christian Borgelt School in a set of molecules that help to discriminate between different classes of, for instance, activity

Borgelt, Christian

104

Distributed Mining of Molecular Fragments Giuseppe Di Fatta  

E-Print Network [OSTI]

Distributed Mining of Molecular Fragments Giuseppe Di Fatta ICAR-CNR, Consiglio Nazionale delle Michael.Berthold@uni-konstanz.de Abstract In real world applications sequential algorithms of data mining mining algorithms. However, the computational complexity of the problem and the large amount of data

Berthold, Michael R.

105

A Hierarchical Distributed Approach for Mining Molecular Fragments  

E-Print Network [OSTI]

for several activities, such as inhibition of HIV or cancer cells. The screened compounds are recordedA Hierarchical Distributed Approach for Mining Molecular Fragments Christoph Sieb1 , Giuseppe Di Fatta2 , and Michael R. Berthold1 1 ALTANA Chair for Bioinformatics and Information Mining Department

Berthold, Michael R.

106

Evaluating biodiversity in fragmented landscapes: applications of landscape ecology tools  

E-Print Network [OSTI]

1 Evaluating biodiversity in fragmented landscapes: applications of landscape ecology tools Kevin landscapes: applications of landscape ecology tools" will soon be published. It will expand on the basic information on Forest Research's work on landscape ecology contact: Kevin Watts Alice Holt Tel: 01420 526200 E

107

Top-Down Fragmentation of a Warm Dark Matter Filament  

E-Print Network [OSTI]

We present the first high-resolution n-body simulations of the fragmentation of dark matter filaments. Such fragmentation occurs in top-down scenarios of structure formation, when the dark matter is warm instead of cold. In a previous paper (Knebe et al. 2002, hereafter Paper I), we showed that WDM differs from the standard Cold Dark Matter (CDM) mainly in the formation history and large-scale distribution of low-mass haloes, which form later and tend to be more clustered in WDM than in CDM universes, tracing more closely the filamentary structures of the cosmic web. Therefore, we focus our computational effort in this paper on one particular filament extracted from a WDM cosmological simulation and compare in detail its evolution to that of the same CDM filament. We find that the mass distribution of the halos forming via fragmentation within the filament is broadly peaked around a Jeans mass of a few 10^9 Msun, corresponding to a gravitational instability of smooth regions with an overdensity contrast around 10 at these redshifts. Our results confirm that WDM filaments fragment and form gravitationally bound haloes in a top-down fashion, whereas CDM filaments are built bottom-up, thus demonstrating the impact of the nature of the dark matter on dwarf galaxy properties.

Alexander Knebe; Julien Devriendt; Brad Gibson; Joseph Silk

2003-07-28T23:59:59.000Z

108

How intimacy affects resource conceptualization  

E-Print Network [OSTI]

Previous research regarding Foa and Foa's Resource Theory does not address whether the level of intimacy shared between the actors affects their resource conceptualization. Furthermore, siblings have not been utilized as a separate intimacy group...

Dunn, Allison L

2001-01-01T23:59:59.000Z

109

Right Ventricular Migration of a Recovery IVC Filter's Fractured Wire with Subsequent Pericardial Tamponade  

SciTech Connect (OSTI)

A Recovery filter (C.R. Bard, Tempe, AZ, USA) is a device for pulmonary embolism prophylaxis. There have been few case reports involving the migration of this particular filter or of a broken wire migrating to the heart. We report a case of right ventricular migration of a fractured wire from this filter in a patient who subsequently developed pericardial tamponade and required open heart surgery to extract the fractured wire. We discuss the current US Food and Drug Administration (FDA)-approved nonpermanent inferior vena cava filters and their reported complications. These complications can be life-threatening and may require immediate surgical intervention.

Saeed, Imran [Christiana Hospital, MAP 2, Suite 2121 (United States)], E-mail: isaeed@christianacare.org; Garcia, Mark [Christiana Hospital, Department of Radiology (United States); McNicholas, Kathleen [Christiana Hospital, MAP 1, Suite 205 (United States)

2006-08-15T23:59:59.000Z

110

The relationship between ownership fragmentation and landscape structure in Bastrop County, Texas  

E-Print Network [OSTI]

Few formalized studies have documented the relationships between land ownership fragmentation and landscape structure. The increasing demand for rural land, especially near urban areas, is causing ownership fragmentation. Several parts of Texas...

Engle, Jason Allen

2002-01-01T23:59:59.000Z

111

E-Print Network 3.0 - amino-terminal fragment 1-431 Sample Search...  

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

fragment 1-431 Search Powered by Explorit Topic List Advanced Search Sample search results for: amino-terminal fragment 1-431 Page: << < 1 2 3 4 5 > >> 1 Proc. Natl. Acad. Sci. USA...

112

Alienation in Italian cities. Social network fragmentation from collective data  

E-Print Network [OSTI]

We study the structure of a social network of strong ties (trust network) investigating its property of connectedness versus fragmentation. To this purpose we analyse an extensive set of census data, about marrying or having children with immigrants, collected by Italian national statistical institute for all Italian municipalities from 2001 to 2011. Not using neither obtaining personal local information but only average ones, our method fully complies with privacy and confidentiality. Our findings show that large cities display the behaviour of highly fragmented trust networks where individuals face possible phenomena of alienation. Smaller cities and villages instead behave like fully connected social systems with a rich tie structure, where isolation is rare or completely absent. While confirming classical sociological theories on alienation in large urban areas our approach provides a quantitative method to test them and a predictive tool for policy makers.

Contucci, Pierluigi

2014-01-01T23:59:59.000Z

113

Formation and reactivity of ketene ligands on an iridium fragment  

SciTech Connect (OSTI)

Metal-ketene complexes have been invoked as intermediates in a number of organometallic transformations. In a search for new routes to metal-ketene complexes, the interaction of the fragment [Ir] = ClIr[P(iPr){sub 3}]{sub 2} with 1 has been examined. Depending on R{sup 1} and R{sup 2}, either (C,O) or (C,C)-bound ketene complexes are obtained, allowing a unique opportunity to study both coordination modes on a single metal fragment. In 1 + [Ir] {yields} 2-4, spectral evidence for an intermediate has been obtained. The coordinative unsaturation of ketene complexes 2 and 3 leads to unusual rearrangements. Unprecedented {alpha}-metallation of P(i-Pr){sub 3} in 3 leads to 5, for which a crystal structure will be presented. Photochemical rearrangement of 2 is reversed thermally, whereas heating 2 results in a 1,3 hydride shift.

Grotjahn, D.B.; Lo, H.C. [Arizona State Univ., Tempe, AZ (United States)

1995-12-31T23:59:59.000Z

114

Neutron emission and fragment yield in high-energy fission  

SciTech Connect (OSTI)

The KRIS special library of spectra and emission probabilities in the decays of 1500 nuclei excited up to energies between 150 and 250 MeV was developed for correctly taking into account the decay of highly excited nuclei appearing as fission fragments. The emission of neutrons, protons, and photons was taken into account. Neutron emission fromprimary fragments was found to have a substantial effect on the formation of yields of postneutron nuclei. The library was tested by comparing the calculated and measured yields of products originating from the fission of nuclei that was induced by high-energy protons. The method for calculating these yields was tested on the basis of experimental data on the thermal-neutroninduced fission of {sup 235}U nuclei.

Grudzevich, O. T., E-mail: ogrudzevich@ippe.ru; Klinov, D. A. [Institute for Physics and Power Engineering (Russian Federation)] [Institute for Physics and Power Engineering (Russian Federation)

2013-07-15T23:59:59.000Z

115

Transformation between statistical ensembles in the modelling of nuclear fragmentation  

E-Print Network [OSTI]

We explore the conditions under which the particle number conservation constraint deforms the predictions of fragmentation observables as calculated in the grand canonical ensemble. We derive an analytical formula allowing to extract canonical results from a grand canonical calculation and vice versa. This formula shows that exact canonical results can be recovered for observables varying linearly or quadratically with the number of particles, independent of the grand canonical particle number fluctuations. We explore the validity of such grand canonical extrapolation for different fragmentation observables in the framework of the analytical Grand Canonical or Canonical Thermodynamical Model [(G)CTM] of nuclear multifragmentation. It is found that corrections to the grand canonical expectations can be evaluated with high precision, provided the system does not experience a first order phase transition. In particular, because of the Coulomb quenching of the liquid-gas phase transition of nuclear matter, we fin...

Chaudhuri, G; Mallik, S

2013-01-01T23:59:59.000Z

116

Temperature of projectile like fragments in heavy ion collisions  

E-Print Network [OSTI]

A model in which a projectile like fragment can be simply regarded as a remnant after removal of some part of the projectile leads to an excited fragment. This excitation energy can be calculated with a Hamiltonian that gives correct nuclear matter binding, compressibility and density distribution in finite nuclei. In heavy ion collisions the model produces a dependence of excitation energy on impact parameter which appears to be correct but the magnitude of the excitation energy falls short. It is argued that dynamic effects left out in the model will increase this magnitude. The model can be directly extended to include dynamics but at the expense of increased computation. For many calculations for observables, a temperature is an easier tool to use rather than an excitation energy. Hence temperature dependences on impact parameter in heavy ion collisions are displayed.

Gupta, S Das; Chaudhuri, G

2013-01-01T23:59:59.000Z

117

Temperature of projectile like fragments in heavy ion collisions  

E-Print Network [OSTI]

A model in which a projectile like fragment can be simply regarded as a remnant after removal of some part of the projectile leads to an excited fragment. This excitation energy can be calculated with a Hamiltonian that gives correct nuclear matter binding, compressibility and density distribution in finite nuclei. In heavy ion collisions the model produces a dependence of excitation energy on impact parameter which appears to be correct but the magnitude of the excitation energy falls short. It is argued that dynamic effects left out in the model will increase this magnitude. The model can be directly extended to include dynamics but at the expense of increased computation. For many calculations for observables, a temperature is an easier tool to use rather than an excitation energy. Hence temperature dependences on impact parameter in heavy ion collisions are displayed.

S. Das Gupta; S. Mallik; G. Chaudhuri

2013-09-27T23:59:59.000Z

118

Isotopic Scaling and the Symmetry Energy in Spectator Fragmentation  

E-Print Network [OSTI]

Isotopic effects in the fragmentation of excited target residues following collisions of $^{12}$C on $^{112,124}$Sn at incident energies of 300 and 600 MeV per nucleon were studied with the INDRA 4$\\pi$ detector. The measured yield ratios for light particles and fragments with atomic number $Z \\leq$ 5 obey the exponential law of isotopic scaling. The deduced scaling parameters decrease with increasing centrality to values as low as $\\alpha = 0.25 \\pm 0.02$ for the central event group at 600 MeV per nucleon. Symmetry term coefficients, deduced from these data within the statistical description of isotopic scaling, are near $\\gamma =$ 25 MeV for peripheral and $\\gamma <$ 10 MeV for central collisions.

Auger, G; Begemann-Blaich, M L; Bellaize, N; Bittiger, R; Bocage, F; Borderie, B; Bougault, R; Bouriquet, B; Charvet, J L; Chbihi, A; Dayras, R; Durand, D; Frankland, J D; Galíchet, E; Gourio, D; Guinet, D; Hudan, S; Imme, G; Lautesse, P; Lavaud, F; Legrain, R; López, O; Lynen, U; Müller, W F J; Nalpas, L; Orth, H; Plagnol, E; Raciti, G; Rosato, E; Saija, A; Schwarz, C; Seidel, W; Sfienti, C; Tamain, B; Trautmann, W; Trzcinski, A; Turzó, K; Vient, E; Vigilante, M; Volant, C; Zwieglinski, B; Botvina, A S; The INDRA Collaboration

2004-01-01T23:59:59.000Z

119

Shock compression and dynamic fragmentation of geological materials  

E-Print Network [OSTI]

Granite is a fully dense igneous rock originating from a quarry in Western Australia, Australia, while Gosford Sandstone is a porous sedimentary rock originating from a coal mine in New South Wales, Australia. These two samples were chosen because... , A., “Dynamic fragmentation of Lake Quarry Granite”, Pressure, Energy, Temperature & Extreme Rate Conference, April 2014, London. 2. Kirk, S., Braithwaite, C., Williamson, D. & Jardine, A., “Shock Com- pression of Geological Materials”, Twenty...

Kirk, Simon

2014-11-11T23:59:59.000Z

120

Symmetry energy for fragmentation in dynamical nuclear collisions  

SciTech Connect (OSTI)

We extract values for the free symmetry energy as a function of the fragment size (the proton number Z) from antisymmetrized molecular dynamics calculations of calcium collisions. Simple statistical physics describe well the distribution of hot nuclei at breakup, provided the surface symmetry term in the free energy is much smaller at high excitation than in ground state nuclei. This result may reflect the condition of low density and finite temperature when these systems disassemble.

Ono, Akira [Department of Physics, Tohoku University, Sendai 980-8578 (Japan); Danielewicz, P.; Lynch, W.G.; Tsang, M.B. [National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States); Friedman, W.A. [Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)

2004-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

EJECTA KNOT FLICKERING, MASS ABLATION, AND FRAGMENTATION IN CASSIOPEIA A  

SciTech Connect (OSTI)

Ejecta knot flickering, ablation tails, and fragmentation are expected signatures associated with the gradual dissolution of high-velocity supernova (SN) ejecta caused by their passage through an inhomogeneous circumstellar medium or interstellar medium (ISM). Such phenomena mark the initial stages of the gradual merger of SN ejecta with and the enrichment of the surrounding ISM. Here we report on an investigation of this process through changes in the optical flux and morphology of several high-velocity ejecta knots located in the outskirts of the young core-collapse SN remnant Cassiopeia A using Hubble Space Telescope images. Examination of WFPC2 F675W and combined ACS F625W + F775W images taken between 1999 June and 2004 December of several dozen debris fragments in the remnant's northeast ejecta stream and along the remnant's eastern limb reveal substantial emission variations ('flickering') over timescales as short as nine months. Such widespread and rapid variability indicates knot scale lengths {approx_equal} 10{sup 15} cm and a highly inhomogeneous surrounding medium. We also identify a small percentage of ejecta knots located all around the remnant's outer periphery which show trailing emissions typically 0.''2-0.''7 in length aligned along the knot's direction of motion suggestive of knot ablation tails. We discuss the nature of these trailing emissions as they pertain to ablation cooling, knot disruption, and fragmentation, and draw comparisons to the emission 'strings' seen in {eta} Car. Finally, we identify several tight clusters of small ejecta knots which resemble models of shock-induced fragmentation of larger SN ejecta knots caused by a high-velocity interaction with a lower density ambient medium.

Fesen, Robert A.; Zastrow, Jordan A.; Hammell, Molly C. [6127 Wilder Laboratory, Department of Physics and Astronomy, Dartmouth College, Hanover, NH 03755 (United States); Shull, J. Michael; Silvia, Devin W. [CASA, Department of Astrophysical and Planetary Science, University of Colorado, Boulder, CO 80309 (United States)

2011-08-01T23:59:59.000Z

122

Coordination of dibensothiophenes and corannulenes to organometallic ruthenium (II) fragments  

SciTech Connect (OSTI)

This dissertation contains five papers in the format required for journal publication which describe (in part) my research accomplishments as a graduate student at Iowa State University. This work can be broadly categorized as the binding of weakly-coordinating ligands to cationic organometallic ruthenium fragments, and consists of two main areas of study. Chapters 2-4 are investigations into factors that influence the binding of dibenzothiophenes to {l_brace}Cp'Ru(CO){sub 2}{r_brace}{sup +} fragments, where Cp' = {eta}{sup 5}-C{sub 5}H{sub 5} (Cp) and {eta}{sup 5}-C{sub 5}Me{sub 5} (Cp*). Chapters 5 and 6 present the synthesis and structural characterization of complexes containing corannulene buckybowls that are {eta}{sup 6}-coordinated to {l_brace}Cp*Ru{r_brace}{sup +} fragments. The first chapter contains a brief description of the difficulty in lowering sulfur levels in diesel fuel along with a review of corannulene derivatives and their metal complexes. After the final paper is a short summary of the work herein (Chapter 7). Each chapter is independent, and all equations, schemes, figures, tables, references, and appendices in this dissertation pertain only to the chapter in which they appear.

Vecchi, Paul Anthony

2005-05-01T23:59:59.000Z

123

The role of Spectator Fragments at an electron Ion collider  

E-Print Network [OSTI]

Efficient detection of spectator fragments is key to the main topics at an electron-ion collider (eIC). Any process which leads to emission of fragments or $\\gamma$'s breaks coherence in diffractive processes. Therefore this is equivalent to non-detection of rapidity gaps in pp collisions. For example, in coherent photoproduction of vector mesons their 4-momentum transfer distribution would image the "gluon charge" in the nucleus in the same way that Hofstadter measured its charge structure using elastic scattering of $\\sim$100 MeV electrons. Whereas he could measure the $\\sim$4 MeV energy loss by the electron due to excitation of nuclear energy levels (Figure 1), even the energy spread of the incident beam would prevent such an inclusive selection of quasielastic events at an eIC. The only available tool is fragment detection. Since, in our example, one finds that $\\sim100$ of deexcitations go through $\\gamma$'s or 1 neutron, rarely to 2 neutron and never to protons(due to Coulomb barrier suppression), the eIC design should emphasize their detection.

Sebastian White; Mark Strikman

2010-03-10T23:59:59.000Z

124

Collision dynamics of proton with formaldehyde: Fragmentation and ionization  

SciTech Connect (OSTI)

Using time-dependent density functional theory, applied to the valence electrons and coupled non-adiabatically to molecular dynamics of the ions, we study the ionization and fragmentation of formaldehyde in collision with a proton. Four different impact energies: 35 eV, 85 eV, 135 eV, and 300 eV are chosen in order to study the energy effect in the low energy region, and ten different incident orientations at 85 eV are considered for investigating the steric effect. Fragmentation ratios, single, double, and total electron ionization cross sections are calculated. For large impact parameters, these results are close to zero irrespective of the incident orientations due to a weak projectile-target interaction. For small impact parameters, the results strongly depend on the collision energy and orientation. We also give the kinetic energy releases and scattering angles of protons, as well as the cross section of different ion fragments and the corresponding reaction channels.

Wang, Jing; Gao, Cong-Zhang [The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China) [The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China); Beijing Radiation Center, Beijing 100875 (China); Calvayrac, Florent [Institut des Molecules et Matériaux du Mans UMR 6283, Université du Maine, LUNAM 72085 Le Mans Cedex 9 (France)] [Institut des Molecules et Matériaux du Mans UMR 6283, Université du Maine, LUNAM 72085 Le Mans Cedex 9 (France); Zhang, Feng-Shou, E-mail: fszhang@bnu.edu.cn [The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China) [The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China); Beijing Radiation Center, Beijing 100875 (China); Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000 (China)

2014-03-28T23:59:59.000Z

125

The fragmentation of expanding shells II: Thickness matters  

E-Print Network [OSTI]

We study analytically the development of gravitational instability in an expanding shell having finite thickness. We consider three models for the radial density profile of the shell: (i) an analytic uniform-density model, (ii) a semi-analytic model obtained by numerical solution of the hydrostatic equilibrium equation, and (iii) a 3D hydrodynamic simulation. We show that all three profiles are in close agreement, and this allows us to use the first model to describe fragments in the radial direction of the shell. We then use non-linear equations describing the time-evolution of a uniform oblate spheroid to derive the growth rates of shell fragments having different sizes. This yields a dispersion relation which depends on the shell thickness, and hence on the pressure confining the shell. We compare this dispersion relation with the dispersion relation obtained using the standard thin-shell analysis, and show that, if the confining pressure is low, only large fragments are unstable. On the other hand, if the...

Wunsch, Richard; Palous, Jan; Whitworth, Anthony P

2010-01-01T23:59:59.000Z

126

LIMITING ACCRETION ONTO MASSIVE STARS BY FRAGMENTATION-INDUCED STARVATION  

SciTech Connect (OSTI)

Massive stars influence their surroundings through radiation, winds, and supernova explosions far out of proportion to their small numbers. However, the physical processes that initiate and govern the birth of massive stars remain poorly understood. Two widely discussed models are monolithic collapse of molecular cloud cores and competitive accretion. To learn more about massive star formation, we perform and analyze simulations of the collapse of rotating, massive, cloud cores including radiative heating by both non-ionizing and ionizing radiation using the FLASH adaptive-mesh refinement code. These simulations show fragmentation from gravitational instability in the enormously dense accretion flows required to build up massive stars. Secondary stars form rapidly in these flows and accrete mass that would have otherwise been consumed by the massive star in the center, in a process that we term fragmentation-induced starvation. This explains why massive stars are usually found as members of high-order stellar systems that themselves belong to large clusters containing stars of all masses. The radiative heating does not prevent fragmentation, but does lead to a higher Jeans mass, resulting in fewer and more massive stars than would form without the heating. This mechanism reproduces the observed relation between the total stellar mass in the cluster and the mass of the largest star. It predicts strong clumping and filamentary structure in the center of collapsing cores, as has recently been observed. We speculate that a similar mechanism will act during primordial star formation.

Peters, Thomas; Klessen, Ralf S.; Banerjee, Robi [Institut fuer Theoretische Astrophysik, Zentrum fuer Astronomie der Universitaet Heidelberg, Albert-Ueberle-Str. 2, D-69120 Heidelberg (Germany); Low, Mordecai-Mark Mac, E-mail: thomas.peters@ita.uni-heidelberg.d [Department of Astrophysics, American Museum of Natural History, 79th Street at Central Park West, New York, NY 10024-5192 (United States)

2010-12-10T23:59:59.000Z

127

Quantifying 3D Reconnection in Fragmented Current Layers  

E-Print Network [OSTI]

There is growing evidence that when magnetic reconnection occurs in high Lundquist number plasmas such as in the Solar Corona or the Earth's Magnetosphere it does so within a fragmented, rather than a smooth current layer. Within the extent of these fragmented current regions the associated magnetic flux transfer and energy release occurs simultaneously in many different places. This investigation focusses on how best to quantify the rate at which reconnection occurs in such layers. An analytical theory is developed which describes the manner in which new connections form within fragmented current layers in the absence of magnetic nulls. It is shown that the collective rate at which new connections form can be characterized by two measures; a total rate which measures the true rate at which new connections are formed and a net rate which measures the net change of connection associated with the largest value of the integral of $E_{\\|}$ through all of the non-ideal regions. Two simple analytical models are pre...

Wyper, Peter F

2015-01-01T23:59:59.000Z

128

First versus subsequent return-stroke current and field peaks in negative cloud-to-ground lightning discharges  

E-Print Network [OSTI]

First versus subsequent return-stroke current and field peaks in negative cloud-to-ground lightning examine relative magnitudes of electric field peaks of first and subsequent return strokes in negative, the electric field peak of the first stroke is appreciably, 1.7 to 2.4 times, larger than the field peak

Florida, University of

129

Communication cost of classically simulating a quantum channel with subsequent rank-1 projective measurement  

E-Print Network [OSTI]

A process of preparation, transmission and subsequent projective measurement of a qubit can be simulated by a classical model with only two bits of communication and some amount of shared randomness. However no model for n qubits with a finite amount of classical communication is known at present. A lower bound for the communication cost can provide useful hints for a generalization. It is known for example that the amount of communication must be greater than c 2^n, where c~0.01. The proof uses a quite elaborate theorem of communication complexity. Using a mathematical conjecture known as the "double cap conjecture", we strengthen this result by presenting a geometrical and extremely simple derivation of the lower bound 2^n-1. Only rank-1 projective measurements are involved in the derivation.

Alberto Montina

2011-10-26T23:59:59.000Z

130

Communication cost of classically simulating a quantum channel with subsequent rank-1 projective measurement  

E-Print Network [OSTI]

A process of preparation, transmission and subsequent projective measurement of a qubit can be simulated by a classical model with only two bits of communication and some amount of shared randomness. However no model for n qubits with a finite amount of classical communication is known at present. A lower bound for the communication cost can provide useful hints for a generalization. It is known for example that the amount of communication must be greater than c 2^n, where c~0.01. The proof uses a quite elaborate theorem of communication complexity. Using a mathematical conjecture known as the "double cap conjecture", we strengthen this result by presenting a geometrical and extremely simple derivation of the lower bound 2^n-1. Only rank-1 projective measurements are involved in the derivation.

Montina, Alberto

2011-01-01T23:59:59.000Z

131

Complex Forces Affect China's Biodiversity  

E-Print Network [OSTI]

global efforts have been put into biodiversity conservation, but biodiversity loss continues rapidly in biodiversity conservation to the global level and help protect biodiversity in other developing countries Wiley & Sons, Ltd. #12;208 ConservationBiology COMPLEXITY OF INTERACTING FORCES AFFECTING BIODIVERSITY

132

V-201: Cisco Intrusion Prevention System SSP Fragmented Traffic...  

Energy Savers [EERE]

traffic could allow an unauthenticated, remote attacker to cause the Analysis Engine process to become unresponsive or cause the affected system to reload. REFERENCE...

133

Calculating kaon fragmentation functions from the Nambu-Jona-Lasinio jet model  

SciTech Connect (OSTI)

The Nambu-Jona-Lasinio (NJL)-jet model provides a sound framework for calculating the fragmentation functions in an effective chiral quark theory, where the momentum and isospin sum rules are satisfied without the introduction of ad hoc parameters. Earlier studies of the pion fragmentation functions using the NJL model within this framework showed qualitative agreement with the empirical parametrizations. Here we extend the NJL-jet model by including the strange quark. The corrections to the pion fragmentation functions and corresponding kaon fragmentation functions are calculated using the elementary quark to quark-meson fragmentation functions from NJL. The results for the kaon fragmentation functions exhibit a qualitative agreement with the empirical parametrizations, while the unfavored strange quark fragmentation to pions is shown to be of the same order of magnitude as the unfavored light quark. The results of these studies are expected to provide important guidance for the analysis of a large variety of semi-inclusive data.

Matevosyan, Hrayr H.; Thomas, Anthony W.; Bentz, Wolfgang [CSSM, School of Chemistry and Physics, University of Adelaide, Adelaide SA 5005 (Australia); Department of Physics, School of Science, Tokai University, Hiratsuka-shi, Kanagawa 259-1292 (Japan)

2011-04-01T23:59:59.000Z

134

Analysis of Transportation and Logistics Challenges Affecting...  

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

of Transportation and Logistics Challenges Affecting the Deployment of Larger Wind Turbines: Summary of Results Analysis of Transportation and Logistics Challenges Affecting...

135

Fragmentation of Negative ions from N-Linked Glycans: Use of Nitrate Adducts to induce Antenna-Specific Fragmentation David J. Harvey  

E-Print Network [OSTI]

identification of underivatized N-linked glycans is normally performed with positive ions whose fragmentation fragmentation spectra were found to contain ions defining specific details of the glycan structure. Materials and Methods Materials N-linked glycans were released with hydrazine from the well-characterised glycoproteins

136

Overwintering survival and role of moisture in diapause termination and subsequent emergence of sorghum midge, (Diptera: Cecidomyiidae)  

E-Print Network [OSTI]

Time of emergence from overwintering and abundance of sorghum midge, Stenodiplosis sorghicola (Coquillett), that initiate the first spring generation dictate the seasonal abundance and subsequent severity of damage the insect causes later...

Mott, Dale Allen

1995-01-01T23:59:59.000Z

137

A Planning Tool for Estimating Waste Generated by a Radiological Incident and Subsequent Decontamination Efforts - 13569  

SciTech Connect (OSTI)

Management of debris and waste from a wide-area radiological incident would probably constitute a significant percentage of the total remediation cost and effort. The U.S. Environmental Protection Agency's (EPA's) Waste Estimation Support Tool (WEST) is a unique planning tool for estimating the potential volume and radioactivity levels of waste generated by a radiological incident and subsequent decontamination efforts. The WEST was developed to support planners and decision makers by generating a first-order estimate of the quantity and characteristics of waste resulting from a radiological incident. The tool then allows the user to evaluate the impact of various decontamination/demolition strategies on the waste types and volumes generated. WEST consists of a suite of standalone applications and Esri{sup R} ArcGIS{sup R} scripts for rapidly estimating waste inventories and levels of radioactivity generated from a radiological contamination incident as a function of user-defined decontamination and demolition approaches. WEST accepts Geographic Information System (GIS) shape-files defining contaminated areas and extent of contamination. Building stock information, including square footage, building counts, and building composition estimates are then generated using the Federal Emergency Management Agency's (FEMA's) Hazus{sup R}-MH software. WEST then identifies outdoor surfaces based on the application of pattern recognition to overhead aerial imagery. The results from the GIS calculations are then fed into a Microsoft Excel{sup R} 2007 spreadsheet with a custom graphical user interface where the user can examine the impact of various decontamination/demolition scenarios on the quantity, characteristics, and residual radioactivity of the resulting waste streams. (authors)

Boe, Timothy [Oak Ridge Institute for Science and Education, Research Triangle Park, NC 27711 (United States)] [Oak Ridge Institute for Science and Education, Research Triangle Park, NC 27711 (United States); Lemieux, Paul [U.S. Environmental Protection Agency, Research Triangle Park, NC 27711 (United States)] [U.S. Environmental Protection Agency, Research Triangle Park, NC 27711 (United States); Schultheisz, Daniel; Peake, Tom [U.S. Environmental Protection Agency, Washington, DC 20460 (United States)] [U.S. Environmental Protection Agency, Washington, DC 20460 (United States); Hayes, Colin [Eastern Research Group, Inc, Morrisville, NC 26560 (United States)] [Eastern Research Group, Inc, Morrisville, NC 26560 (United States)

2013-07-01T23:59:59.000Z

138

Direct fission fragment energy converter - Magnetic collimator option  

SciTech Connect (OSTI)

The present study was focused on developing a technologically feasible power system that is based on direct fission fragment energy conversion utilizing magnetic collimation. The new concept is an attempt to combine several advantageous design solutions, which have been proposed for application in both fission and fusion reactors, into one innovative system that can offer exceptional energy conversion efficiency. The analysis takes into consideration a wide range of operational aspects including fission fragment escape from the fuel, collimation, collection, criticality, long-term performance, energy conversion efficiency, heat removal, and safety characteristics. Specific characteristics of the individual system components and the entire system are evaluated. Analysis and evaluation of the technological feasibility of the concept were achieved using state-of-the-art computer codes that allowed realistic and consistent modeling. In addition to the extensive computational effort, the scaled prototype experimental proof-of-principle program was conducted to validate basic physics of the concept. The program was focused on electromagnetic components and experimental demonstration of performance. This paper summarizes the final results of the 6-years research program including both computational and experimental efforts. Potential future research and development and anticipated applications are discussed. (authors)

Tsvetkov, P. V.; Hart, R. R. [Dept. of Nuclear Engineering, Texas AandM Univ., 129 Zachry Engineering Center, College Station, TX 77843-3133 (United States)

2006-07-01T23:59:59.000Z

139

An evaluation of some innovative fragmentation systems for oil shale  

SciTech Connect (OSTI)

This report describes a large-scale underground mining method, large-hole stoping, using some innovative fragmentation systems (buffer blasting, continuous loading/hauling, and mechanical miners for development). This study includes a literature review and an experimental study of one of the key design factors--buffer blasting. The purpose of the buffer-blasting experiments is to examine the swell that is necessary to achieve satisfactory fragmentation results. The study also includes a technical and economic evaluation of the new mining method compared with conventional room and pillar mining. The purpose of this study is to examine innovative methods that exist today and may provide a more efficient mining system than that currently used. Note that this is a conceptual study, and that the mining for the two mine designs were compared using a daily production rate of 75,000 tones per day. This amount was chosen because it is the maximum amount possible for a rubber-tired room and pillar operation with only a one-shaft complex.

Hieta, M.; Hustrulid, W.A. (Western Research Inst., Laramie, WY (United States))

1991-06-01T23:59:59.000Z

140

Magnetically-Regulated Fragmentation Induced by Nonlinear Flows and Ambipolar Diffusion  

E-Print Network [OSTI]

We present a parameter study of simulations of fragmentation regulated by gravity, magnetic fields, ambipolar diffusion, and nonlinear flows. The thin-sheet approximation is employed with periodic lateral boundary conditions, and the nonlinear flow field ("turbulence") is allowed to freely decay. In agreement with previous results in the literature, our results show that the onset of runaway collapse (formation of the first star) in subcritical clouds is significantly accelerated by nonlinear flows in which a large-scale wave mode dominates the power spectrum. In addition, we find that a power spectrum with equal energy on all scales also accelerates collapse, but by a lesser amount. For a highly super-Alfvenic initial velocity field with most power on the largest scales, the collapse occurs promptly during the initial compression wave. However, for trans-Alfvenic perturbations, a subcritical magnetic field causes a rebound from the initial compression, and the system undergoes several oscillations before runaway collapse occurs. Models that undergo prompt collapse have highly supersonic infall motions at the core boundaries. Cores in magnetically subcritical models with trans-Alfvenic initial perturbations also pick up significant systematic speeds by inheriting motions associated with magnetically-driven oscillations. Core mass distributions are much broader than in models with small-amplitude initial perturbations, although the disturbed structure of cores that form due to nonlinear flows does not guarantee subsequent monolithic collapse. Our simulations also demonstrate that significant power can (if present initially) be maintained with negligible dissipation in large-scale compressive modes of a magnetic thin sheet, in the limit of perfect flux freezing.

Shantanu Basu; Glenn E. Ciolek; Wolf Dapp; James Wurster

2009-01-14T23:59:59.000Z

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


141

Spectroscopy of {Beta}-Delayed Charged Particles at Projectile Fragment Separators  

SciTech Connect (OSTI)

The combination of projectile fragmentation reactions and in-flight separation has proved to be a powerful tool to produce nuclei at the limits of stability. Decay studies of very neutron-deficient projectile fragments led to the discovery of several new {beta}-delayed particle emitters. Basic principles of the method are described and various aspects of extracting interesting spectroscopic information from {beta}-delayed particle studies at projectile fragment separators are discussed.

Janas, Zenon

2000-12-31T23:59:59.000Z

142

Tracking energy fluctuations from fragment partitions in the Lattice Gas model  

E-Print Network [OSTI]

Partial energy fluctuations are known tools to reconstruct microcanonical heat capacities. For experimental applications, approximations have been developed to infer fluctuations at freeze out from the observed fragment partitions. The accuracy of this procedure as well as the underlying independent fragment approximation is under debate already at the level of equilibrated systems. Using a well controlled computer experiment, the Lattice Gas model, we critically discuss the thermodynamic conditions under which fragment partitions can be used to reconstruct the thermodynamics of an equilibrated system.

F. Gulminelli; Ph. Chomaz; M. D'Agostino

2004-07-28T23:59:59.000Z

143

Quantum-mechanical description of in-medium fragmentation  

E-Print Network [OSTI]

We present a quantum-mechanical description of quark-hadron fragmentation in a nuclear environment. It employs the path-integral formulation of quantum mechanics, which takes care of all phases and interferences, and which contains all relevant time scales, like production, coherence, formation, etc. The cross section includes the probability of pre-hadron (colorless dipole) production both inside and outside the medium. Moreover, it also includes inside-outside production, which is a typical quantum-mechanical interference effect (like twin-slit electron propagation). We observe a substantial suppression caused by the medium, even if the pre-hadron is produced outside the medium and no energy loss is involved. This important source of suppression is missed in the usual energy-loss scenario interpreting the effect of jet quenching observed in heavy ion collisions. This may be one of the reasons of a too large gluon density, reported by such analyzes.

B. Z. Kopeliovich; H. -J. Pirner; I. K. Potashnikova; Ivan Schmidt; A. V. Tarasov; O. O. Voskresenskaya

2008-09-27T23:59:59.000Z

144

Partial proteolytic digestion of the mammary prolactin receptor: Identification of smaller prolactin binding fragments  

SciTech Connect (OSTI)

Partial proteolytic digestion of the mammary prolactin (PRL) receptor was used to generate receptor fragments and analyze their immunoreactivity and PRL binding properties. Tryptic digestion of the PRL receptor produced two immunoreactive fragments (Mr approximately 30,000 and approximately 15,000) that reacted with a monoclonal anti-PRL receptor antibody and still specifically bound PRL, while the complete immunoreactive PRL binding unit (Mr approximately 42,000) disappeared. Neither chymotrypsin nor V8 protease were able to generate any immunoreactive receptor fragments. These receptor fragments may represent smaller PRL binding receptor form(s) of biological significance.

Dusanter-Fourt, I.; Kelly, P.A.; Djiane, J. (Institut National de la Recherche Agronomique, Jouy-en-Josas (France))

1990-01-01T23:59:59.000Z

145

Characterization of fragment emission in ^{20}Ne (7 - 10 MeV/nucleon) + ^{12}C reactions  

E-Print Network [OSTI]

The inclusive energy distributions of the complex fragments (3 $\\leq$ Z $\\leq$ 7) emitted from the bombardment of ^{12}C by ^{20}Ne beams with incident energies between 145 and 200 MeV have been measured in the angular range 10$^{o} \\leq \\theta_{lab} \\leq$ 50^{o}. Damped fragment yields in all the cases have been found to be the characteristic of emission from fully energy equilibrated composites. The binary fragment yields are compared with the standard statistical model predictions. Enhanced yields of entrance channel fragments (5 $\\leq$ Z $\\leq$ 7) indicate the survival of orbiting-like process in ^{20}Ne + ^{12}C system at these energies.

Aparajita Dey; C. Bhattacharya; S. Bhattacharya; S. Kundu; K. Banerjee; S. Mukhopadhyay; D. Gupta; T. Bhattacharjee; S. R. Banerjee; S. Bhattacharyya; T. K. Rana; S. K. Basu; R. Saha; K. Krishan; A. Mukherjee; D. Bandopadhyay; C. Beck

2007-07-23T23:59:59.000Z

146

E-Print Network 3.0 - asian manuscript fragments Sample Search...  

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

. bipectinata strains Strains Typea Origin Yearb Donor Asian 381.0* Multi Patan, Nepal 1954 TDSSCd 381.1 Multi... , DNA was isolated and the target fragments amplified...

147

THE RIDDLE OF THE MANY HEADS: TEOTIHUÁCAN FIGURINE FRAGMENTS AT THE HOUSTON MUSEUM OF NATURAL SCIENCE.  

E-Print Network [OSTI]

??The purpose of this study is to examine a collection of 128 terracotta figurine fragments presently housed at the Houston Museum of Natural Science. These… (more)

Baldwin, Aline C.

2015-01-01T23:59:59.000Z

148

amplified-fragment length polymorphism: Topics by E-print Network  

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

NOTE Shannon L. Datwyler,1,2 Environmental Sciences and Ecology Websites Summary: in Hemp and Marijuana (Cannabis sativa L.) According to Amplified Fragment Length...

149

Jet Fragmentation in Medium and Vacuum with the PHENIX Detector  

E-Print Network [OSTI]

One of the most active areas of investigation in relativistic heavy-ion collisions is the study of the jet quenching phenomenon whereby hard partons lose their energy as they traverse the hot, dense matter created in such collisions. Strong parton energy loss has been observed in central nucleus-nucleus collisions as evidenced by the a large suppression of the yield of high pT hadrons as compared to the expected yield based on measurements in p+p collisions. Moreover, measurements of back-to-back correlations of charged hadrons suggest that jet shapes are strongly modified modified by the medium. The quantitative interpretation of single and di-hadron measurements is, however, complicated by the fact that the initial parton energy is unknown. A more informative measurement would be one in which the initial parton energy is known, allowing the determination of the fragmentation function, which may be effectively modified from its vacuum form by the presence of the medium. Two measurements in which the initial parton energy may be estimated are discussed in these proceedings: jet reconstruction and two- particle correlations using direct photons. Jet reconstruction in nuclear collisions is challenging due to the large background of soft particles, fluctuations of which give rise to fake jets. Direct photons can be used to estimate the initial parton energy of the recoil jet without recourse to jet reconstruction algorithms. However, such studies suffer from a smaller rate and the direct photon signal must be disentangled from a large background of decay photons. We present jet reconstruction results which use an algorithm suitable for a high multiplicity environment. We also present results of two-particle correlations using direct photons. These results are discussed in the context of medium modification to the fragmentation function.

Matthew Nguyen for the PHENIX Collaboration

2010-08-08T23:59:59.000Z

150

4, 30553085, 2007 Winter climate affects  

E-Print Network [OSTI]

HESSD 4, 3055­3085, 2007 Winter climate affects long-term trends in stream water nitrate H. A. de and Earth System Sciences Winter climate affects long-term trends in stream water nitrate in acid Winter climate affects long-term trends in stream water nitrate H. A. de Wit et al. Title Page Abstract

Boyer, Edmond

151

A case study of a Greenland lee cyclogenesis event and the subsequent spawning of a tip jet  

E-Print Network [OSTI]

A case study of a Greenland lee cyclogenesis event and the subsequent spawning of a tip jet Carling: With elevations exceeding 2000m in height, Greenland's southern tip acts as a large barrier to storm systems traversing the North Atlantic. As a result of the interaction with Greenland, low-pressure systems located

Pickart, Robert S.

152

Onset and Subsequent Transient Phenomena of Liquid Loading in Gas Wells: Experimental Investigation Using a Large Scale Flow Loop  

E-Print Network [OSTI]

was carried out to study the onset of liquid loading and the subsequent transient phenomena, using a large scale flow loop to visualize two-phase flow regimes, and to measure pressure and liquid holdup along a 42-m long vertical tube. From this investigation...

Waltrich, Paulo

2012-10-19T23:59:59.000Z

153

Beacon Training in a Water Maze Can Facilitate and Compete With Subsequent Room Cue Learning in Rats  

E-Print Network [OSTI]

Beacon Training in a Water Maze Can Facilitate and Compete With Subsequent Room Cue Learning experiments in which rats completed a water-maze blocking procedure, experimental groups were trained to use location. A Room Test (landmarks and background cues only) showed that Stage 1 training with a fixed

Indiana University

154

In-Source Fragmentation and the Sources of Partially Tryptic Peptides in Shotgun Proteomics  

SciTech Connect (OSTI)

Partially tryptic peptides are often identified in shotgun proteomics using trypsin as the proteolytic enzyme; however, it has been controversial regarding the sources of such partially tryptic peptides. Herein we investigate the impact of in-source fragmentation on shotgun proteomics using three biological samples, including a standard protein mixture, a mouse brain tissue homogenate, and a mouse plasma sample. Since the in-source fragments of a peptide retain the same elution time with its parent fully tryptic peptide, the partially tryptic peptides from in-source fragmentation can be distinguished from the other partially tryptic peptides by plotting the observed retention times against the computationally predicted retention times. Most partially tryptic in-source fragmentation artifacts were misaligned from the linear distribution of fully tryptic peptides. The impact of in-source fragmentation on peptide identifications was clearly significant in a less complex sample such as a standard protein digest, where ~60 % of unique peptides were observed as partially tryptic peptides from in-source fragmentation. In mouse brain or mouse plasma samples, in-source fragmentation contributed to 1-3 % of all identified peptides. The other major source of partially tryptic peptides in complex biological samples is presumably proteolytic processing by endogenous proteases in the samples. By filtering out the in-source fragmentation artifacts from the identified partially tryptic or non-tryptic peptides, it is possible to directly survey in-vivo proteolytic processing in biological samples such as blood plasma. ?

Kim, Jong Seo; Monroe, Matthew E.; Camp, David G.; Smith, Richard D.; Qian, Weijun

2013-02-01T23:59:59.000Z

155

Phase-space analysis of fragments formed in heavy-ion collisions  

E-Print Network [OSTI]

We study the effect of momentum-dependent interactions and a broader Gaussian on multifragmentation. We also look into the details of the fragment structure for a broader Gaussian and momentum-dependent interactions. We find that nucleons forming the fragments belong to same region of the phase space.

Sakshi Gautam; Preeti Bansal

2011-04-01T23:59:59.000Z

156

A `resource allocator' for transcription based on a highly fragmented T7 RNA polymerase  

E-Print Network [OSTI]

. However, they can exhibit toxicity and lack accessory proteins (r factors and activators) that enable (inactivated) r fragment, respectively. The a fragment can be fused to recombinant proteins to make promoters for the difference in copy number of two plasmids. Keywords genetic circuit; resource allocation; split protein

Sontag, Eduardo

157

N-Z distributions of secondary fragments and the evaporation attractor line  

SciTech Connect (OSTI)

The process of light particle evaporation moves the position of an excited fragment in the chart of nuclides towards a line which will be called the evaporation attractor line. The predicted location of this line is parametrized and the conditions necessary for the secondary fragment distributions to reach this line are discussed. {copyright} {ital 1998} {ital The American Physical Society}

Charity, R.J. [Department of Chemistry, Washington University, St. Louis, Missouri 63130 (United States)] [Department of Chemistry, Washington University, St. Louis, Missouri 63130 (United States)

1998-08-01T23:59:59.000Z

158

Understanding and Exploiting Peptide Fragment Ion Intensities Using Experimental and Informatic Approaches*  

E-Print Network [OSTI]

that describe how protonated peptides fragment when activated by collisions in a mass spectrometer and how identification algorithms is examined. Key words: Peptide fragmentation, Data mining, Tandem mass spectrometry, who left us January 8th, 2009 after a courageous battle with cancer. Simon J. Hubbard and Andrew R

Wysocki, Vicki H.

159

Effect of pulse intensity distributions on fragment internal energy in the infrared multiphoton dissociation of vinyl  

E-Print Network [OSTI]

Effect of pulse intensity distributions on fragment internal energy in the infrared multiphoton of laser intensity on the production of fragment energy distribu- tions. Laser induced fluorescence (LIF pumping is pro- portional to the light intensity, the final energy of the parent molecule

Zare, Richard N.

160

Absence of Fragmentation in Two-Dimensional Bose-Einstein Condensation  

E-Print Network [OSTI]

); moreover, a mean-field analysis of a homogeneous three-dimensional Bose gas with repulsive interactions5Absence of Fragmentation in Two-Dimensional Bose-Einstein Condensation Juan Pablo Fern-dimensional finite trapped systems consist of fragmented condensates. We derive and diagonalize the one-body density

Mullin, William J.

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161

Ultrafast dynamics and fragmentation of C60 in intense laser pulses  

E-Print Network [OSTI]

The radiation-induced fragmentation of the C60 fullerene was investigated by the tight-binding electron-ion dynamics simulations. In intense laser field, the breathing vibrational mode is much more strongly excited than the pentagonal-pinch mode. The fragmentation effect was found more remarkable at long wavelength lambda>800 nm rather than the resonant wavelengths due to the internal laser-induced dipole force, and the production ratio of C and C2 rapidly grows with increasing wavelength. By such fragmentation law, C atoms, C2 dimers or large Cn fragments could be selectively obtained by changing the laser wavelength. And the fragmentation of C60 by two laser pulses like the multi-step atomic photoionization was investigated.

Lin, Zheng-Zhe

2014-01-01T23:59:59.000Z

162

On the deceleration of cometary fragments in aerogel  

E-Print Network [OSTI]

Abstract: Determining the thermal history of the cometary grains captured by the Stardust mission presents a difficult problem. We consider two simplified models for the deceleration of hypervelocity particles captured in aerogel; both models assume a velocity squared drag force. The first model assumes that the mass of the particle remains constant during capture and the second that mass is lost due to ablation of the particle through interactions with the aerogel. It is found that the constant mass model adequately reproduces the track lengths, found from experiments by Ho¨rz et al. in 2008, that impacted aluminium oxide spheres into aerogel at hypervelocities y6 kmsx1. Deceleration in aerogel heats volatile particles such as organic ices to high temperatures greater than 1,000 K, for durations of y1 ms: more than sufficient to completely ablate the particle. Refractory particles also experience significant heating greater than 2500 K, greater than the particle’s melting point, over similar timescales. This suggests that the fragments recovered to Earth by the Stardust mission were considerably altered by hypersonic capture by aerogel, and so limits the amount of information that can be obtained regarding the formation of mineral and organic particles within Kuiper Belt comets.

S. G. Coulson

2008-01-01T23:59:59.000Z

163

Investigation of the reaction {sup 208}Pb({sup 18}O, f): Fragment spins and phenomenological analysis of the angular anisotropy of fission fragments  

SciTech Connect (OSTI)

The average multiplicity of gamma rays emitted by fragments originating from the fission of {sup 226}Th nuclei formed via a complete fusion of {sup 18}O and {sup 208}Pb nuclei at laboratory energies of {sup 18}O projectile ions in the range E{sub lab} = 78-198.5 MeV is measured and analyzed. The total spins of fission fragments are found and used in an empirical analysis of the energy dependence of the anisotropy of these fragments under the assumption that their angular distributions are formed in the vicinity of the scission point. The average temperature of compound nuclei at the scission point and their average angular momenta in the entrance channel are found for this analysis. Also, the moments of inertia are calculated for this purpose for the chain of fissile thorium nuclei at the scission point. All of these parameters are determined at the scission point by means of three-dimensional dynamical calculations based on Langevin equations. A strong alignment of fragment spins is assumed in analyzing the anisotropy in question. In that case, the energy dependence of the anisotropy of fission fragments is faithfully reproduced at energies in excess of the Coulomb barrier (E{sub c.m.} - E{sub B} {>=} 30 MeV). It is assumed that, as the excitation energy and the angular momentum of a fissile nucleus are increased, the region where the angular distributions of fragments are formed is gradually shifted from the region of nuclear deformations in the vicinity of the saddle point to the region of nuclear deformations in the vicinity of the scission point, the total angular momentum of the nucleus undergoing fission being split into the orbital component, which is responsible for the anisotropy of fragments, and the spin component. This conclusion can be qualitatively explained on the basis of linear-response theory.

Rusanov, A. Ya. [National Nuclear Center of the Republic of Kazakhstan, Institute of Nuclear Physics (Kazakhstan)], E-mail: rusanov@inp.kz; Adeev, G. D. [Omsk State University (Russian Federation); Itkis, M. G.; Karpov, A. V. [Joint Institute for Nuclear Research (Russian Federation); Nadtochy, P. N. [Omsk State University (Russian Federation); Pashkevich, V. V.; Pokrovsky, I. V.; Salamatin, V. S. [Joint Institute for Nuclear Research (Russian Federation); Chubarian, G. G. [Texas A and M University, Cyclotron Institute (United States)

2007-10-15T23:59:59.000Z

164

The Formation and Fragmentation of Primordial Molecular Clouds  

E-Print Network [OSTI]

Many questions in physical cosmology regarding the thermal history of theintergalactic medium, chemical enrichment, reionization, etc. are thought to beintimately related to the nature and evolution of pregalactic structure. Inparticular the efficiency of primordial star formation and the primordial IMFare of special interest. We present results from high resolutionthree--dimensional adaptive mesh refinement simulations that follow thecollapse of primordial molecular clouds and their subsequent fragmentationwithin a cosmologically representative volume. Comoving scales from 128 kpcdown to 1 pc are followed accurately. Dark matter dynamics, hydrodynamics andall relevant chemical and radiative processes (cooling) are followedself-consistently for a cluster normalized CDM structure formation model.Primordial molecular clouds with ~10^5 solar masses are assembled by mergers ofmultiple objects that have formed hydrogen molecules in the gas phase with afractional abundance of ~10^-4. As the subclumps merge cooling ...

Abel, T; Norman, M L; Abel, Tom; Bryan, Greg L.; Norman, Michael L.

2000-01-01T23:59:59.000Z

165

Protective Effects of Repetitive Injections of Radiographic Contrast Media on the Subsequent Tolerance to Ischemia in the Isolated Rat Heart  

SciTech Connect (OSTI)

Purpose: Despite detailed knowledge of the effects of X-ray contrast media on cardiac function, no studies have examined the effect of contrast media injections on the subsequent tolerance to ischemia in the heart.Methods: Isolated perfused rat hearts were exposed to repetitive injections of iohexol, iodixanol, or ioxaglate before 30 min of global ischemia and 120 min of reperfusion. These groups were compared with control (no pretreatment) and ischemic preconditioning known to reduce infarct size. Physiologic variables and infarct size were measured. Results: Pretreatment with iodixanol reduced infarct size significantly compared with control and thus afforded protection against ischemia. Injections with iohexol and ioxaglate reduced infarct size, although not significantly, compared with control.Conclusion: Pretreatment of the isolated rat heart with commonly used contrast media enhances the cardiac tolerance to subsequent ischemia. The mechanism behind this protective effect could not be determined, but could involve stretching of the heart and/or generation of nitric oxide.

Falck, Geir; Bruvold, Morten [Department of Physiology and Biomedical Engineering, Norwegian University of Science and Technology, Medisinsk Teknisk Senter, N-7489 Trondheim (Norway); Schjott, Jan [Experimental Cardiology Unit, RELIS VEST, Haukeland Hospital, N-5021 Bergen (Norway); Jynge, Per [Department of Physiology and Biomedical Engineering, Norwegian University of Science and Technology, Medisinsk Teknisk Senter, N-7489 Trondheim (Norway)

2000-11-15T23:59:59.000Z

166

Radiation induced redox reactions and fragmentation of constituent ions in ionic liquids II. Imidazolium cations.  

SciTech Connect (OSTI)

In part 1 of this study, radiolytic degradation of constituent anions in ionic liquids (ILs) was examined. The present study continues the themes addressed in part 1 and examines the radiation chemistry of 1,3-dialkyl substituted imidazolium cations, which currently comprise the most practically important and versatile class of ionic liquid cations. For comparison, we also examined 1,3-dimethoxy- and 2-methyl-substituted imidazolium and 1-butyl-4-methylpyridinium cations. In addition to identification of radicals using electron paramagnetic resonance spectroscopy (EPR) and selective deuterium substitution, we analyzed stable radiolytic products using {sup 1}H and {sup 13}C nuclear magnetic resonance (NMR) and tandem electrospray ionization mass spectrometry (ESMS). Our EPR studies reveal rich chemistry initiated through 'ionization of the ions': oxidation and the formation of radical dications in the aliphatic arms of the parent cations (leading to deprotonation and the formation of alkyl radicals in these arms) and reduction of the parent cation, yielding 2-imidazolyl radicals. The subsequent reactions of these radicals depend on the nature of the IL. If the cation is 2-substituted, the resulting 2-imidazolyl radical is relatively stable. If there is no substitution at C(2), the radical then either is protonated or reacts with the parent cation forming a C(2)-C(2) {sigma}{sigma}*-bound dimer radical cation. In addition to these reactions, when methoxy or C{sub {alpha}}-substituted alkyl groups occupy the N(1,3) positions, their elimination is observed. The elimination of methyl groups from N(1,3) was not observed. Product analyses of imidazolium liquids irradiated in the very-high-dose regime (6.7 MGy) reveal several detrimental processes, including volatilization, acidification, and oligomerization. The latter yields a polymer with m/z of 650 {+-} 300 whose radiolytic yield increases with dose (0.23 monomer units per 100 eV for 1-methyl-3-butylimidazolium trifluorosulfonate). Gradual generation of this polymer accounts for the steady increase in the viscosity of the ILs upon irradiation. Previous studies at lower dose have missed this species due to its wide mass distribution (stretching out to m/z 1600) and broad NMR lines, which make it harder to detect at lower concentrations. Among other observed changes is the formation of water immiscible fractions in hydrophilic ILs and water miscible fractions in hydrophobic ILs. The latter is due to anion fragmentation. The import of these observations for use of ILs as extraction solvents in nuclear cycle separations is discussed.

Shkrob, I. A.; Marin, T. W.; Chemerisov, S. D.; Hatcher, J.; Wishart, J. (Chemical Sciences and Engineering Division); (BNL)

2011-04-14T23:59:59.000Z

167

Emission Reduction and Assisted Combustion Strategies for Compression Ignition Engines with Subsequent Testing on a Single-Cylinder Engine  

E-Print Network [OSTI]

a probe connected to the exhaust pipe. This volume is drawn through a filter paper with subsequent measurement using an orifice flow meter. The blackening of the filter paper is recorded as a Filtration Soot Number (FSN) and as a soot.... Other areas of possible concern comprise fouling or leaking of the system, as well as condensation building up within the cooler. In 2002, Abd-Alla investigated the potential of EGR to reduce NOx emissions. The discussion in this paper mentions...

Ragone, Colter

2012-08-31T23:59:59.000Z

168

TMD Parton Distribution and Fragmentation Functions with QCD Evolution  

E-Print Network [OSTI]

We assess the current phenomenological status of transverse momentum dependent (TMD) parton distribution functions (PDFs) and fragmentation functions (FFs) and study the effect of consistently including perturbative QCD (pQCD) evolution. Our goal is to initiate the process of establishing reliable, QCD-evolved parametrizations for the TMD PDFs and TMD FFs that can be used both to test TMD-factorization and to search for evidence of the breakdown of TMD-factorization that is expected for certain processes. In this article, we focus on spin-independent processes because they provide the simplest illustration of the basic steps and can already be used in direct tests of TMD-factorization. Our calculations are based on the Collins-Soper-Sterman (CSS) formalism, supplemented by recent theoretical developments which have clarified the precise definitions of the TMD PDFs and TMD FFs needed for a valid TMD-factorization theorem. Starting with these definitions, we numerically generate evolved TMD PDFs and TMD FFs using as input existing parametrizations for the collinear PDFs, collinear FFs, non-perturbative factors in the CSS factorization formalism, and recent fixed-scale fits. We confirm that evolution has important consequences, both qualitatively and quantitatively, and argue that it should be included in future phenomenological studies of TMD functions. Our analysis is also suggestive of extensions to processes that involve spin-dependent functions such as the Boer-Mulders, Sivers, or Collins functions, which we intend to pursue in future publications. At our website we have made available the tables and calculations needed to obtain the TMD parametrizations presented herein.

S. Mert Aybat; Ted C. Rogers

2011-06-15T23:59:59.000Z

169

Size matters: Origin of binomial scaling in nuclear fragmentation experiments Wolfgang Bauer and Scott Pratt  

E-Print Network [OSTI]

­16 , in particular if one wants to understand why particular molecular dynamics codes produce fragments conducted at the GSI, a measurement of the tem- perature as a function of excitation energy found possible

Bauer, Wolfgang

170

E-Print Network 3.0 - antibody fragment scfv Sample Search Results  

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

scfv Search Powered by Explorit Topic List Advanced Search Sample search results for: antibody fragment scfv Page: << < 1 2 3 4 5 > >> 1 TM* Trademark of The Dow Chemical Company...

171

Bounded-Variable Fragments of Hybrid Logics Thomas Schwentick and Volker Weber  

E-Print Network [OSTI]

Bounded-Variable Fragments of Hybrid Logics Thomas Schwentick and Volker Weber Fachbereich Informatik, Universit¨at Dortmund, Germany {thomas.schwentick,volker.weber}@udo.edu Abstract. Hybrid logics

Schwentick, Thomas

172

Models of fragmentation phenomena based on the symmetric group S sub n and combinational analysis  

SciTech Connect (OSTI)

Various models for fragmentation phenomena are developed using methods from permutation groups and combinational analysis. The appearance and properties of power laws in these models are discussed. Various exactly soluble cases are studied.

Mekjian, A.Z. (Washington Univ., Seattle, WA (United States). Inst. for Nuclear Theory); Lee, S.J. (Rutgers--the State Univ., Piscataway, NJ (United States). Dept. of Physics and Astronomy)

1991-01-29T23:59:59.000Z

173

Models of fragmentation phenomena based on the symmetric group S{sub n} and combinational analysis  

SciTech Connect (OSTI)

Various models for fragmentation phenomena are developed using methods from permutation groups and combinational analysis. The appearance and properties of power laws in these models are discussed. Various exactly soluble cases are studied.

Mekjian, A.Z. [Washington Univ., Seattle, WA (United States). Inst. for Nuclear Theory; Lee, S.J. [Rutgers--the State Univ., Piscataway, NJ (United States). Dept. of Physics and Astronomy

1991-01-29T23:59:59.000Z

174

Glycan fragment database: a database of PDB-based glycan 3D structures  

E-Print Network [OSTI]

The glycan fragment database (GFDB), freely available at http://www.glycanstructure.org, is a database of the glycosidic torsion angles derived from the glycan structures in the Protein Data Bank (PDB). Analogous to protein ...

Jo, Sunhwan; Im, Wonpil

2012-10-25T23:59:59.000Z

175

TWO-STAGE FRAGMENTATION FOR CLUSTER FORMATION: ANALYTICAL MODEL AND OBSERVATIONAL CONSIDERATIONS  

SciTech Connect (OSTI)

Linear analysis of the formation of protostellar cores in planar magnetic interstellar clouds shows that molecular clouds exhibit a preferred length scale for collapse that depends on the mass-to-flux ratio and neutral-ion collision time within the cloud. We extend this linear analysis to the context of clustered star formation. By combining the results of the linear analysis with a realistic ionization profile for the cloud, we find that a molecular cloud may evolve through two fragmentation events in the evolution toward the formation of stars. Our model suggests that the initial fragmentation into clumps occurs for a transcritical cloud on parsec scales while the second fragmentation can occur for transcritical and supercritical cores on subparsec scales. Comparison of our results with several star-forming regions (Perseus, Taurus, Pipe Nebula) shows support for a two-stage fragmentation model.

Bailey, Nicole D.; Basu, Shantanu, E-mail: nwityk@uwo.ca, E-mail: basu@uwo.ca [Department of Physics and Astronomy, University of Western Ontario, 1151 Richmond Street, London, ON N6A 3K7 (Canada)

2012-12-10T23:59:59.000Z

176

Transport Model Simulations of Projectile Fragmentation Reactions at 140 MeV/nucleon  

E-Print Network [OSTI]

The collisions in four different reaction systems using 40,48Ca and 58,64Ni isotope beams and a Be target have been simulated using the Heavy Ion Phase Space Exploration and the Antisymmetrized Molecular Dynamics models. The present study mainly focuses on the model predictions of excitation energy of the hot fragments and the cross sections of final fragments produced in these reactions. The calculated fragment cross sections are compared to the published projectile fragmentation cross sections measured with a mass separator. Experimental efficiency-correction assumptions and their effects in validation of event generator codes are discussed in the light of the reaction dynamics described by these two models. The effects of various factors influencing the calculated cross sections, such as the choice of the statistical decay code and its parameters have been explored. Present study suggests that the CPU requirements and the uncertainties of model parameters including the influence of sequential decay effects...

Mocko, M; Lacroix, D; Ono, A; Danielewicz, P; Lynch, W G; Charity, R J

2008-01-01T23:59:59.000Z

177

E-Print Network 3.0 - acid fragment up-regulated Sample Search...  

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

Explorit Topic List Advanced Search Sample search results for: acid fragment up-regulated Page: << < 1 2 3 4 5 > >> 1 Molecular and Cellular Biochemistry 221: 127132, 2001. 2001...

178

Femtosecond spectroscopy probes the folding quality of antibody fragments expressed as GFP fusions in the cytoplasm  

SciTech Connect (OSTI)

Time-resolved femtosecond spectroscopy can improve the application of green fluorescent proteins (GFPs) as protein-folding reporters. The study of ultrafast excited-state dynamics (ESD) of GFP fused to single chain variable fragment (scFv) antibody fragments, allowed us to define and measure an empirical parameter that only depends on the folding quality (FQ) of the fusion. This method has been applied to the analysis of genetic fusions expressed in the bacterial cytoplasm and allowed us to distinguish folded and thus functional antibody fragments (high FQ) with respect to misfolded antibody fragments. Moreover, these findings were strongly correlated to the behavior of the same scFvs expressed in animal cells. This method is based on the sensitivity of the ESD to the modifications in the tertiary structure of the GFP induced by the aggregation state of the fusion partner. This approach may be applicable to the study of the FQ of polypeptides over-expressed under reducing conditions.

Didier, P. [Faculte de Pharmacie, UMR 7175, 74, route du Rhin, 67412 Illkirch (France); Weiss, E.; Sibler, A.-P. [Ecole Superieure de Biotechnologie de Strasbourg, UMR 7175, Boulevard Sebastien Brant, F-67412 Illkirch (France); Philibert, P.; Martineau, P. [Centre de recherche en cancerologie de Montpellier, UMR 5160, Val d'Aurelle-Paul Lamarque, 34298 Montpellier cedex 5 (France); Bigot, J.-Y. [Institut de Physique et Chimie des Materiaux de Strasbourg, UMR 7504, 23, rue du Loess, F-67037 Strasbourg (France); Guidoni, L. [Institut de Physique et Chimie des Materiaux de Strasbourg, UMR 7504, 23, rue du Loess, F-67037 Strasbourg (France); Laboratoire Materiaux et Phenomenes Quantiques, UMR 7162, Batiment Condorcet, 10 rue Alice Domon et Leonie Duquet, 75205 Paris cedex 13 (France)], E-mail: luca.guidoni@univ-paris-diderot.fr

2008-02-22T23:59:59.000Z

179

Orientation and alignment effects in ion-induced fragmentation of water: A triple coincidence study  

SciTech Connect (OSTI)

The technique of recoil ion momentum spectroscopy is employed to determine the complete momentum vectors for three fragment dissociation channels, [D{sub 2}O]{sup (q+2)} ? (D{sup +} + D{sup +} + O{sup q+}) with q = 1, 2, or 3 formed in collisions of isolated water molecules with 450 keV Xe{sup 9+} ions. The kinetic energy released in each of these dissociation channels is measured and angular correlations between the fragment momenta are determined. From the angular correlations of the three fragment ions with the direction of the incoming beam, a strong anisotropy in the emission of recoil fragments is reported. It is inferred that the molecular plane prefers to lie orthogonal to the incoming beam direction with certain orientations being more preferred than others and a clear signature of non-coplanar dissociation is also observed.

Rajput, Jyoti, E-mail: jyotirajput2803@gmail.com [Department of Physics and Astrophysics, University of Delhi, Delhi 110007 (India); Safvan, C. P. [Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067 (India)

2014-10-28T23:59:59.000Z

180

Study of Charm Fragmentation into $D^{*\\pm}$ Mesons in Deep-Inelastic Scattering at HERA  

E-Print Network [OSTI]

The process of charm quark fragmentation is studied using $D^{*\\pm}$ meson production in deep-inelastic scattering as measured by the H1 detector at HERA. Two different regions of phase space are investigated defined by the presence or absence of a jet containing the $D^{*\\pm}$ meson in the event. The parameters of fragmentation functions are extracted for QCD models based on leading order matrix elements and DGLAP or CCFM evolution of partons together with string fragmentation and particle decays. Additionally, they are determined for a next-to-leading order QCD calculation in the fixed flavour number scheme using the independent fragmentation of charm quarks to $D^{*\\pm}$ mesons.

Aaron, F D; Andreev, V; Antunovic, B; Aplin, S; Asmone, A; Astvatsatourov, A; Bacchetta, A; Backovic, S; Baghdasaryan, A; Barrelet, E; Bartel, W; Beckingham, M; Begzsuren, K; Behnke, O; Belousov, A; Berger, N; Bizot, J C; Boenig, M O; Boudry, V; Bozovic-Jelisavcic, I; Bracinik, J; Brandt, G; Brinkmann, M; Brisson, V; Bruncko, D; Bunyatyan, A; Buschhorn, G; Bystritskaya, L; Campbell, A J; Cantun Avila, K B; Cassol-Brunner, F; Cerny, K; Cerny, V; Chekelian, V; Cholewa, A; Contreras, J G; Coughlan, J A; Cozzika, G; Cvach, J; Dainton, J B; Daum, K; Deak, M; de Boer, Y; Delcourt, B; Del Degan, M; Delvax, J; De Roeck, A; De Wolf, E A; Diaconu, C; Dodonov, V; Dossanov, A; Dubak, A; Eckerlin, G; Efremenko, V; Egli, S; Eliseev, A; Elsen, E; Essenov, S; Falkiewicz, A; Faulkner, P J W; Favart, L; Fedotov, A; Felst, R; Feltesse, J; Ferencei, J; Fleischer, M; Fomenko, A; Gabathuler, E; Gayler, J; Ghazaryan, S; Glazov, A; Glushkov, I; Goerlich, L; Goettlich, M; Gogitidze, N; Gouzevitch, M; Grab, C; Greenshaw, T; Grell, B R; Grindhammer, G; Habib, S; Haidt, D; Hansson, M; Helebrant, C; Henderson, R C W; Hennekemper, E; Henschel, H; Herrera, G; Hildebrandt, M; Hiller, K H; Hoffmann, D; Horisberger, R; Hovhannisyan, A; Hreus, T; Jacquet, M; Janssen, M E; Janssen, X; Jemanov, V; Jonsson, L; Jung, Andreas Werner; Jung, H; Kapichine, M; Katzy, J; Kenyon, I R; Kiesling, C; Klein, M; Kleinwort, C; Klimkovich, T; Kluge, T; Knutsson, A; Kogler, R; Korbel, V; Kostka, P; Kraemer, M; Krastev, K; Kretzschmar, J; Kropivnitskaya, A; Kruger, K; Kutak, K; Landon, M P J; Lange, W; Lastovicka-Medin, G; Laycock, P; Lebedev, A; Leibenguth, G; Lendermann, V; Levonian, S; Li, G; Lipka, K; Liptaj, A; List, B; List, J; Loktionova, N; Lopez-Fernandez, R; Lubimov, V; Lucaci-Timoce, A I; Lytkin, L; Makankine, A; Malinovski, E; Marage, P; Marti, Ll; Martyn, H U; Maxfield, S J; Mehta, A; Meier, K; Meyer, A B; Meyer, H; Meyer, H; Meyer, J; Michels, V; Mikocki, S; Milcewicz-Mika, I; Moreau, F; Morozov, A; Morris, J V; Mozer, Matthias Ulrich; Mudrinic, M; Muller, K; Murin, P; Nankov, K; Naroska, B; Naumann, Th; Newman, Paul R; Niebuhr, C; Nikiforov, A; Nowak, G; Nowak, K; Nozicka, M; Olivier, B; Olsson, J E; Osman, S; Ozerov, D; Palichik, V; Panagoulias, I; Pandurovic, M; Papadopoulou, Th; Pascaud, C; Patel, G.D; Pejchal, O; Peng, H; Perez, E; Petrukhin, A; Picuric, I; Piec, S; Pitzl, D; Placakyte, R; Polifka, R; Povh, B; Preda, T; Radescu, V; Rahmat, A J; Raicevic, N; Raspiareza, A; Ravdandorj, T; Reimer, P; Rizvi, E; Robmann, P; Roland, B; Roosen, R; Rostovtsev, A; Rotaru, M; Ruiz Tabasco, J E; Rurikova, Z; Rusakov, S; Salek, D; Salvaire, F; Sankey, D P C; Sauter, M; Sauvan, E; Schmidt, S; Schmitt, S; Schmitz, C; Schoeffel, L; Schoning, A; Schultz-Coulon, H C; Sefkow, F; Shaw-West, R N; Sheviakov, I; Shtarkov, L N; Shushkevich, S; Sloan, T; Smiljanic, Ivan; Smirnov, P; Soloviev, Y; Sopicki, P; South, D; Spaskov, V; Specka, Arnd E; Staykova, Z; Steder, M; Stella, B; Straumann, U; Sunar, D; Sykora, T; Tchoulakov, V; Thompson, G; Thompson, P.D; Toll, T; Tomasz, F; Tran, T H; Traynor, D; Trinh, T N; Truol, P; Tsakov, I; Tseepeldorj, B; Tsurin, I; Turnau, J; Tzamariudaki, E; Urban, K; Valkarova, A; Vallee, C; Van Mechelen, P; Vargas Trevino, A; Vazdik, Y; Vinokurova, S; Volchinski, V; Wegener, D; Wessels, M; Wissing, Ch; Wunsch, E; Yeganov, V; Zacek, J; Zalesak, J; Zhang, Z; Zhelezov, A; Zhokin, A; Zhu, Y C; Zimmermann, T; Zohrabyan, H; Zomer, F; 10.1140/epjc/s10052-008-0792-2

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

Fission Fragment Distributions and Delayed Neutron Yields from Photon-Induced-Fission  

SciTech Connect (OSTI)

Fission fragment distributions and delayed neutron yields for 235U and 238U are provided by a complete modelization of the photofission process below 25 MeV. The absorption cross-section parameterization and the fission fragment distributions are given and compared to experimental data. The delayed neutron yields and the half-lives in terms of six groups are presented and compared to data obtained with a bremsstrahlung spectrum of 15 MeV.

David, J.-C.; Dore, D.; Giacri-Mauborgne, M.-L.; Ridikas, D.; Lauwe, A. van [DSM/DAPNIA/SPhN, CEA/Saclay, F-91191 Gif-sur-Yvette cedex (France)

2005-05-24T23:59:59.000Z

182

Test of the Universality of Naive-time-reversal-odd Fragmentation Functions  

E-Print Network [OSTI]

We investigate the ''spontaneous'' hyperon transverse polarization in $e^+e^-$ annihilation and semi-inclusive deep inelastic scattering processes as a test of the universality of the naive-time-reversal-odd transverse momentum dependent fragmentation functions. We find that universality implies definite sign relations among various observables. This provides a unique opportunity to study initial/final state interaction effects in the fragmentation process and test the associated factorization.

Daniel Boer; Zhong-Bo Kang; Werner Vogelsang; Feng Yuan

2010-08-20T23:59:59.000Z

183

Incorporating classical studies in education: Parmenides' fragments as teaching tools and specific emphasis on Parmenides' proem  

E-Print Network [OSTI]

be aplied to the searches of others. I am interested in utilizing the writings of Parmenides’ work to form a framework for a philosophy curiculum for secondary schols. The thesis is centered on Parmenides’ proem-introduction, poem and its aplications... Education from Postmodernism........53 CHAPTER VI LITERATURE REVIEW.........................................5 CHAPTER VI PARMENIDES’ FRAGMENTS AS TEACHING TOLS..............57 Specific Teaching Tols Aplication..................................57 Fragment One...

Yates, Deborah

2007-09-17T23:59:59.000Z

184

Properties of the largest fragment in multifragmentation: a canonical thermodynamic calculation  

E-Print Network [OSTI]

Many calculations for the production of light and intermediate particles resulting from heavy ion collisions at intermediate energies exist. Calculations of properties of the largest fragment resulting from multifragmentation are rare. In this paper we compute these properties and compare them with the data for the case of gold on carbon. We use the canonical thermodynamic model. The model also gives a bimodal distribution for the largest fragment in a narrow energy range.

G. Chaudhuri; S. Das Gupta

2007-02-27T23:59:59.000Z

185

The effect of added phosphorus on the reproductive performance of turkey hens and the subsequent effect upon the poult  

E-Print Network [OSTI]

~ fulfillment cf ihn requirement for the degree of NASTER OF SClFNCE Au gus 't 1970 (m~on th ~yea~r Najor Subject P ltd THE EFFECT OF ADDED PHOSPHORUS ON THE REPRODUCTIVE PERFORIM?E OF TURKEY HENS AND THE SUBSEQUENT EFFECT UPON THE POUDT CI o rA l4... in cages and fed diets containing phosphorus from plant sources only (0. 35/ total phosphorus) and diets that had supplemental inorganic phosphorus added (1. 0@ total phosphorus). Calcium levels were maintained at 2. 5 per- cent for each diet...

Sewell, Charles Edward

1970-01-01T23:59:59.000Z

186

Transport model simulations of projectile fragmentation reactions at 140 MeV/nucleon  

SciTech Connect (OSTI)

The collisions in four different reaction systems using {sup 40,48}Ca and {sup 58,64}Ni isotope beams and a Be target have been simulated using the heavy ion phase space exploration and the antisymmetrized molecular dynamics models. The present study mainly focuses on the model predictions for the excitation energies of the hot fragments and the cross sections of the final fragments produced in these reactions. The effects of various factors influencing the final fragment cross sections, such as the choice of the statistical decay code and its parameters, have been explored. The predicted fragment cross sections are compared to the projectile fragmentation cross sections measured with the A1900 mass separator. At E/A=140 MeV, reaction dynamics can significantly modify the detection efficiencies for the fragments and make them different from the efficiencies applied to the measured data reported in the previous work. The effects of efficiency corrections on the validation of event generator codes are discussed in the context of the two models.

Mocko, M. [Los Alamos National Laboratory, Post Office Box 1663, Los Alamos, New Mexico 87545 (United States); National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States); Tsang, M. B.; Danielewicz, P.; Lynch, W. G. [National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States); Lacroix, D. [National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States); Ganil, CEA, IN2P3-CNRS, Boite Postal 5027, F-14021 Caen Cedex (France); Ono, A. [Department of Physics, Tohoku University, Sendai 980-8578 (Japan); Charity, R. J. [Chemistry Department, Washington University, St. Louis, Missouri 63130 (United States)

2008-08-15T23:59:59.000Z

187

Transport Model Simulations of Projectile Fragmentation Reactions at 140 MeV/nucleon  

E-Print Network [OSTI]

The collisions in four different reaction systems using $^{40,48}$Ca and $^{58,64}$Ni isotope beams and a Be target have been simulated using the Heavy Ion Phase Space Exploration and the Antisymmetrized Molecular Dynamics models. The present study mainly focuses on the model predictions for the excitation energies of the hot fragments and the cross sections of the final fragments produced in these reactions. The effects of various factors influencing the final fragment cross sections, such as the choice of the statistical decay code and its parameters have been explored. The predicted fragment cross sections are compared to the projectile fragmentation cross sections measured with the A1900 mass separator. At $E/A=140$ MeV, reaction dynamics can significantly modify the detection efficiencies for the fragments and make them different from the efficiencies applied to the measured data reported in the previous work. The effects of efficiency corrections on the validation of event generator codes are discussed in the context of the two models.

M. Mocko; M. B. Tsang; D. Lacroix; A. Ono; P. Danielewicz; W. G. Lynch; R. J. Charity

2008-04-16T23:59:59.000Z

188

Two source emission behaviour of alpha fragments of projectile having energy around 1 GeV per nucleon  

E-Print Network [OSTI]

The emission of projectile fragments alpha has been studied in ^{84}Kr interactions with nuclei of the nuclear emulsion detector composition at relativistic energy below 2 GeV per nucleon. The angular distribution of projectile fragments alpha in terms of transverse momentum could not be explained by a straight and clean-cut collision geometry hypothesis of Participant - Spectator (PS) Model. Therefore, it is assumed that projectile fragments alpha were produced from two separate sources that belong to the projectile spectator region differing drastically in their temperatures. It has been clearly observed that the emission of projectile fragments alpha are from two different sources. The contribution of projectile fragments alpha from contact layer or hot source is a few percent of the total emission of projectile fragments alphas. Most of the projectile fragments alphas are emitted from the cold source. It has been noticed that the temperature of hot and cold regions are dependent on the projectile mass number.

V. Singh; M. K. Singh; Ramji Pathak

2010-09-17T23:59:59.000Z

189

Two source emission behavior of projectile fragments alpha in 84^Kr interactions at around 1 GeV per nucleon  

E-Print Network [OSTI]

The emission of projectile fragments alpha has been studied in 84^Kr interactions with nuclei of the nuclear emulsion detector composition at relativistic energy below 2 GeV per nucleon. The angular distribution of projectile fragments alpha in terms of transverse momentum could not be explained by a straight and clean-cut collision geometry hypothesis of Participant - Spectator (PS) Model. Therefore, it is assumed that projectile fragments alpha were produced from two separate sources that belong to the projectile spectator region differing drastically in their temperatures. It has been clearly observed that the emission of projectile fragments alpha are from two different sources. The contribution of projectile fragments alpha from contact layer or hot source is a few percent of the total emission of projectile fragments alphas. Most of the projectile fragments alphas are emitted from the cold source.

M. K. Singh; Ramji Pathak; V. Singh

2010-08-12T23:59:59.000Z

190

Maerz, N. H., and Palangio, T. C. WipFrag System II -Online fragmentation analysis. FRAGBLAST 6, Sixth International Symposium For Rock Fragmentation By Blasting, Johannesburg, South Africa,  

E-Print Network [OSTI]

, Sixth International Symposium For Rock Fragmentation By Blasting, Johannesburg, South Africa, Aug. 8 Professor, Rock Mechanics and Explosives Research Center, University of Missouri-Rolla, MO, USA, (573) 341 . By far the most significant source of error is sampling, whether the source is a result of: 1. Poor

Maerz, Norbert H.

191

Pesticide Properties that Affect Water Quality  

E-Print Network [OSTI]

In order to keep our water supplies safe from pesticide contamination, we must understand which pesticide properties affect water quality, and how. The subject is complex, as properties such as pesticide class, formulation, toxicity, dose, effective...

Stevenson, Douglas; Baumann, Paul A.; Jackman, John A.

1997-06-30T23:59:59.000Z

192

EARLY STAGES OF CLUSTER FORMATION: FRAGMENTATION OF MASSIVE DENSE CORES DOWN TO {approx}< 1000 AU  

SciTech Connect (OSTI)

In order to study the fragmentation of massive dense cores, which constitute the cluster cradles, we observed the continuum at 1.3 mm and the CO (2-1) emission of four massive cores with the Plateau de Bure Interferometer in the most extended configuration. We detected dust condensations down to {approx}0.3 M {sub Sun} and separate millimeter sources down to 0.''4 or {approx}< 1000 AU, comparable to the sensitivities and separations reached in optical/infrared studies of clusters. The CO (2-1) high angular resolution images reveal high-velocity knots usually aligned with previously known outflow directions. This, in combination with additional cores from the literature observed at similar mass sensitivity and spatial resolution, allowed us to build a sample of 18 protoclusters with luminosities spanning three orders of magnitude. Among the 18 regions, {approx}30% show no signs of fragmentation, while 50% split up into {approx}> 4 millimeter sources. We compiled a list of properties for the 18 massive dense cores, such as bolometric luminosity, total mass, and mean density, and found no correlation of any of these parameters with the fragmentation level. In order to investigate the combined effects of the magnetic field, radiative feedback, and turbulence in the fragmentation process, we compared our observations to radiation magnetohydrodynamic simulations and found that the low-fragmented regions are reproduced well in the magnetized core case, while the highly fragmented regions are consistent with cores where turbulence dominates over the magnetic field. Overall, our study suggests that the fragmentation in massive dense cores could be determined by the initial magnetic field/turbulence balance in each particular core.

Palau, Aina; Girart, Josep M. [Institut de Ciencies de l'Espai (CSIC-IEEC), Campus UAB-Facultat de Ciencies, Torre C5-parell 2, E-08193 Bellaterra, Catalunya (Spain)] [Institut de Ciencies de l'Espai (CSIC-IEEC), Campus UAB-Facultat de Ciencies, Torre C5-parell 2, E-08193 Bellaterra, Catalunya (Spain); Fuente, Asuncion [Observatorio Astronomico Nacional, P.O. Box 112, E-28803 Alcala de Henares, Madrid (Spain)] [Observatorio Astronomico Nacional, P.O. Box 112, E-28803 Alcala de Henares, Madrid (Spain); Estalella, Robert [Departament d'Astronomia i Meteorologia (IEEC-UB), Institut de Ciencies del Cosmos, Universitat de Barcelona, Marti Franques, 1, E-08028 Barcelona (Spain)] [Departament d'Astronomia i Meteorologia (IEEC-UB), Institut de Ciencies del Cosmos, Universitat de Barcelona, Marti Franques, 1, E-08028 Barcelona (Spain); Ho, Paul T. P.; Zhang, Qizhou [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)] [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Sanchez-Monge, Alvaro; Fontani, Francesco; Cesaroni, Riccardo [Osservatorio Astrofisico di Arcetri, INAF, Lago E. Fermi 5, I-50125 Firenze (Italy)] [Osservatorio Astrofisico di Arcetri, INAF, Lago E. Fermi 5, I-50125 Firenze (Italy); Busquet, Gemma [INAF-Istituto di Astrofisica e Planetologia Spaziali, Area di Recerca di Tor Vergata, Via Fosso Cavaliere 100, I-00133 Roma (Italy)] [INAF-Istituto di Astrofisica e Planetologia Spaziali, Area di Recerca di Tor Vergata, Via Fosso Cavaliere 100, I-00133 Roma (Italy); Commercon, Benoit; Hennebelle, Patrick [Laboratoire de Radioastronomie, UMR CNRS 8112, Ecole Normale Superieure et Observatoire de Paris, 24 rue Lhomond, F-75231 Paris Cedex 05 (France)] [Laboratoire de Radioastronomie, UMR CNRS 8112, Ecole Normale Superieure et Observatoire de Paris, 24 rue Lhomond, F-75231 Paris Cedex 05 (France); Boissier, Jeremie [Istituto di Radioastronomia, INAF, Via Gobetti 101, I-40129 Bologna (Italy)] [Istituto di Radioastronomia, INAF, Via Gobetti 101, I-40129 Bologna (Italy); Zapata, Luis A., E-mail: palau@ieec.uab.es [Centro de Radioastronomia y Astrofisica, Universidad Nacional Autonoma de Mexico, P.O. Box 3-72, 58090 Morelia, Michoacan (Mexico)

2013-01-10T23:59:59.000Z

193

affects glut4 expression: Topics by E-print Network  

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

terms: Design, Human Factors. Keywords: Haptic interface, affective touch, human-robot interaction, physiological sensing. INTRODUCTION AND OVERVIEW Affective touch...

194

affect cd1 expression: Topics by E-print Network  

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

terms: Design, Human Factors. Keywords: Haptic interface, affective touch, human-robot interaction, physiological sensing. INTRODUCTION AND OVERVIEW Affective touch...

195

A Predictive Model of Fragmentation using Adaptive Mesh Refinement and a Hierarchical Material Model  

SciTech Connect (OSTI)

Fragmentation is a fundamental material process that naturally spans spatial scales from microscopic to macroscopic. We developed a mathematical framework using an innovative combination of hierarchical material modeling (HMM) and adaptive mesh refinement (AMR) to connect the continuum to microstructural regimes. This framework has been implemented in a new multi-physics, multi-scale, 3D simulation code, NIF ALE-AMR. New multi-material volume fraction and interface reconstruction algorithms were developed for this new code, which is leading the world effort in hydrodynamic simulations that combine AMR with ALE (Arbitrary Lagrangian-Eulerian) techniques. The interface reconstruction algorithm is also used to produce fragments following material failure. In general, the material strength and failure models have history vector components that must be advected along with other properties of the mesh during remap stage of the ALE hydrodynamics. The fragmentation models are validated against an electromagnetically driven expanding ring experiment and dedicated laser-based fragmentation experiments conducted at the Jupiter Laser Facility. As part of the exit plan, the NIF ALE-AMR code was applied to a number of fragmentation problems of interest to the National Ignition Facility (NIF). One example shows the added benefit of multi-material ALE-AMR that relaxes the requirement that material boundaries must be along mesh boundaries.

Koniges, A E; Masters, N D; Fisher, A C; Anderson, R W; Eder, D C; Benson, D; Kaiser, T B; Gunney, B T; Wang, P; Maddox, B R; Hansen, J F; Kalantar, D H; Dixit, P; Jarmakani, H; Meyers, M A

2009-03-03T23:59:59.000Z

196

Hydro-gravitational fragmentation, diffusion and condensation of the primordial plasma, dark-matter and gas  

E-Print Network [OSTI]

The first structures were proto-voids formed in the primordial plasma. Viscous and weak turbulence forces balanced gravitational forces when the scale of causal connection at time 30,000 years matched the viscous and turbulent Schwarz scales of hydro-gravitational theory (Gibson 1996). The photon viscosity allows only weak turbulence from the Reynolds number Re = 200, with fragmentation to give proto-supercluster voids, buoyancy forces, fossil vorticity turbulence, and strong sonic damping. The expanding, cooling, plasma continued fragmentation to proto-galaxy-mass with the density and rate-of-strain preserved as fossils of the weak turbulence and first structure. Turbulence fossilization by self-gravitational buoyancy explains the cosmic microwave background temperature fluctuations, not sonic oscillations in cold-dark-matter fragments. After plasma to gas transition at 300,000 years, gas fragmentation occurred within the proto-galaxies to form proto-globular-star-cluster (PGCs) clouds of small-planetary-mass primordial-fog-particles (PFPs). Dark PGC clumps of frozen PFPs persist as the inner-galaxy-halo dark matter, supporting Schild's 1996 quasar-microlensing interpretation. Non-baryonic dark matter diffused into the plasma proto-cluster-voids and later fragmented as outer-galaxy-halos at diffusive Schwarz scales, indicating light, weakly-collisional fluid particles (possibly neutrinos). Observations support the theory (Gibson and Schild 2003).

Carl H. Gibson

2003-05-19T23:59:59.000Z

197

Differences in Electrostatic Potential Around DNA Fragments Containing Guanine and 8-oxo-Guanine  

SciTech Connect (OSTI)

hanges of electrostatic potential (EP) around the DNA molecule resulting from chemical modifications of nucleotides may play a role in enzymatic recognition of damaged sites. Effects of chemical modifications of nucleotides on the structure of DNA have been characterized through large scale density functional theory computations. Quantum mechanical structural optimizations of DNA fragments with three pairs of nucleotoides and accompanying counteractions were performed with a B3LYP exchange-correlation functional and 6-31G** basis sets. The “intact” DNA fragment contained guanine in the middle layer, while the “damaged” fragment had the guanine replaced with 8-oxo-guanine. The electrostatic potential around these DNA fragments was projected on a surface around the double helix. The 2D maps of EP of intact and damaged DNA fragments were analyzed to identify these modifications of EP that result from the occurrence of 8-oxo-guanine. It was found that distortions of the phosphate groups and displacements of the accompanying countercations are clearly reflected in the EP maps.

Haranczyk, Maciej; Gutowski, Maciej S.

2007-02-01T23:59:59.000Z

198

The effect of rock fragments on the hydraulic properties of soils  

SciTech Connect (OSTI)

Many soils contain rock fragments the sizes of which are much larger than the average pore size of the sieved soil. Due to the fact that these fragments are often fairly large in relation to the soil testing apparatus, it is common to remove them before performing hydrologic tests on the soil. The question then arises as to whether or not there is a simple way to correct the laboratory-measured values to account for the fragments, so as to arrive at property values that can apply to the soil in situ. This question has arisen in the surface infiltration studies that are part of the site characterization program at Yucca Mountain, where accurate values of the hydraulic conductivities of near-surface soils are needed in order to accurately estimate infiltration rates. Although this problem has been recognized for some time, and numerous review articles have been written there are as yet no proven models to account for the effect of rock fragments on hydraulic conductivity and water retention. In this report we will develop some simple physically-based models to account for the effects of rock fragments on gross hydrological properties, and apply the resulting equations to experimental data taken from the literature. These models are intended for application to data that is currently being collected by scientists from the USGS on near-surface soils from Yucca Mountain.

Zimmerman, R.W.; Bodvarsson, G.S.

1995-04-01T23:59:59.000Z

199

Asymmetry in the scaling laws for light- and heavy-nucleus fragmentation  

SciTech Connect (OSTI)

For the inclusive cross section B+A..-->..C+X, with the beam momentum per nucleon equal to p, and with the conditions 1< or approx. =B< or approx. =pm/sup -1/<fragmentation, derived by Schmidt and Blankenbecler, and find the violation of the scaling law for the heavy-nucleus (A) fragmentation. To account for the heavy-nucleus fragmentation we use the cluster model of Landau and Gyulassy. We work in the light-front scheme, in which all particles, including the intermediate one, are on their mass shell, while the off-shell continuation is made only in the ''minus'' component of the total momentum. That gives us some control of the off-shell behavior of the inclusive subprocess a+b..-->..C+d, in terms of which one determines the process B+A..-->..C+X.

Namyslowski, J.M.; Danielewicz, P.

1981-03-01T23:59:59.000Z

200

The fragmentation of expanding shells I: Limitations of the thin--shell approximation  

E-Print Network [OSTI]

We investigate the gravitational fragmentation of expanding shells in the context of the linear thin--shell analysis. We make use of two very different numerical schemes; the FLASH Adaptive Mesh Refinement code and a version of the Benz Smoothed Particle Hydrodynamics code. We find that the agreement between the two codes is excellent. We use our numerical results to test the thin--shell approximation and we find that the external pressure applied to the shell has a strong effect on the fragmentation process. In cases where shells are not pressure--confined, the shells thicken as they expand and hydrodynamic flows perpendicular to the plane of the shell suppress fragmentation at short wavelengths. If the shells are pressure--confined internally and externally, so that their thickness remains approximately constant during their expansion, the agreement with the analytical solution is better.

Dale, James E; Whitworth, Anthony; Palous, Jan

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

Complex particle and light fragment emission in the cascade-excitation model of nuclear reactions  

SciTech Connect (OSTI)

A brief description of our improvements and refinements that led from the CEM95 version of the Cascade-Exciton Model (CEM) code to CEM97 and to CEM2k is given. The increased accuracy and predictive power of the code CEM2k are shown by several examples. To describe fission and light-fragment (heavier than {sup 4}He) production, the CEM2k code has been merged with the GEM2 code of Furihata. We present some results on proton-induced fragmentation and fission reactios predicted by this extended version of CEM2k. We show that merging CEM2k with GEM2 allows us to describe many fission and fragmentation reactions in addition to the spallation reactions which are already relatively well described.

Mashnik, S. G. (Stepan G.); Sierk, A. J. (Arnold J.); Gudima, K. K. (Konstantin K.)

2002-01-01T23:59:59.000Z

202

THE BURST MODE OF ACCRETION AND DISK FRAGMENTATION IN THE EARLY EMBEDDED STAGES OF STAR FORMATION  

SciTech Connect (OSTI)

We revisit our original papers on the burst mode of accretion by incorporating a detailed energy balance equation into a thin-disk model for the formation and evolution of circumstellar disks around low-mass protostars. Our model includes the effect of radiative cooling, viscous and shock heating, and heating due to stellar and background irradiation. Following the collapse from the prestellar phase allows us to model the early embedded phase of disk formation and evolution. During this time, the disk is susceptible to fragmentation, depending upon the properties of the initial prestellar core. Globally, we find that higher initial core angular momentum and mass content favors more fragmentation, but higher levels of background radiation can moderate the tendency to fragment. A higher rate of mass infall onto the disk than that onto the star is a necessary but not a sufficient condition for disk fragmentation. More locally, both the Toomre Q-parameter needs to be below a critical value and the local cooling time needs to be shorter than a few times the local dynamical time. Fragments that form during the early embedded phase tend to be driven into the inner disk regions and likely trigger mass accretion and luminosity bursts that are similar in magnitude to FU-Orionis-type or EX-Lupi-like events. Disk accretion is shown to be an intrinsically variable process, thanks to disk fragmentation, nonaxisymmetric structure, and the effect of gravitational torques. The additional effect of a generic {alpha}-type viscosity acts to reduce burst frequency and accretion variability, and is likely to not be viable for values of {alpha} significantly greater than 0.01.

Vorobyov, Eduard I. [Institute for Computational Astrophysics, Saint Mary's University, Halifax, NS B3H 3C3 (Canada); Basu, Shantanu, E-mail: vorobyov@ap.smu.c, E-mail: basu@uwo.c [Department of Physics and Astronomy, The University of Western Ontario, London, ON N6A 3K7 (Canada)

2010-08-20T23:59:59.000Z

203

Even-odd effects and Coulomb effects on minimal excitation energy of fragments from low energy fission  

E-Print Network [OSTI]

This work is focused on even-odd effects on the minimal total fragment excitation energy in thermal neutron induced fission of 233U and 235U as well as in spontaneous fission of 252Cf. In a scission model, taking into account the fragment deformation properties and Coulomb interaction between fragments, the expression of the difference between Q-values referred to even/even and odd/odd charge splits, respectively, on the corresponding difference between the minimal total fragment excitation energy is studied.

Modesto Montoya

2014-10-06T23:59:59.000Z

204

Reexamination of fission fragment angular distributions and the fission process: Formalism  

SciTech Connect (OSTI)

The theory of fission fragment angular distributions is examined and the universally used expression is found to be valid only under restrictive assumptions. A more general angular distribution formula is derived and applied to recent data of high spin systems. At the same time it is shown that the strong anisotropies observed from such systems can be understood without changing the essential basis of standard fission theory. The effects of reaction mechanisms other than complete fusion on fission fragment angular distributions are discussed and possible angular distribution signatures of noncompound nucleus formation are mentioned.

Bond, P.D.

1985-08-01T23:59:59.000Z

205

Even-odd effects in Z and N distributions of fragments emitted at intermediate energies  

SciTech Connect (OSTI)

Even-odd effects in Z and N distributions of light fragments emitted at forward angles in nuclear collisions {sup 40}Ca + {sup 40}Ca, {sup 40}Ca + {sup 48}Ca, and {sup 48}Ca + {sup 48}Ca at 25 MeV/nucleon and identified in charge and mass with the Chimera multidetector have been analyzed. The amplitude of even-odd staggering effects seems to be related to the neutron to proton ratio N/Z of the entrance channels. A qualitative explanation of this effect, taking into account the deexcitation phase of primary excited fragments, is discussed.

Lombardo, I.; Lanzalone, G. [INFN-Laboratori Nazionali del Sud, Via S. Sofia, Catania (Italy); Facolta di Ingegneria ed Architettura, Universita' 'Kore'' di Enna, Enna (Italy); Agodi, C.; Amorini, F.; Anzalone, A.; Han, J.; Maiolino, C. [INFN-Laboratori Nazionali del Sud, Via S. Sofia, Catania (Italy); Auditore, L.; Loria, D.; Trifiro, A.; Trimarchi, M. [Dipartimento di Fisica, Universita di Messina and INFN-Gruppo Collegato, Messina (Italy); Berceanu, I. [Institute for Physics and Nuclear Engineering, Bucharest (Romania); Cardella, G.; De Filippo, E.; Pagano, A.; Papa, M.; Pirrone, S. [INFN-Sezione di Catania, Via S. Sofia, 95123 Catania (Italy); Cavallaro, S.; Porto, F.; Rizzo, F. [INFN-Laboratori Nazionali del Sud, Via S. Sofia, Catania (Italy); Dipartimento di Fisica e Astronomia, Universita di Catania, Via S. Sofia, Catania (Italy)

2011-08-15T23:59:59.000Z

206

Interplay between compound and fragments aspects of nuclear fission and heavy-ion reaction  

SciTech Connect (OSTI)

The scission point in nuclear fission plays a special role where one-body system changes to two-body system. Inverse of this situation is realized in heavy-ion fusion reaction where two-body system changes to one body system. Among several peculiar phenomena expected to occur during this change, we focus our attention to the behavior of compound and fragments shell effects. Some aspects of the interplay between compound and fragments shell effect are discussed related to the topics of the fission valleys in the potential energy surface of actinide nuclei and the fusion-like trajectory found in the cold fusion reaction leading to superheavy nuclei.

Moller, Peter [Los Alamos National Laboratory; Iwamoto, A [JAPAN; Ichikawa, I [JAPAN

2010-09-10T23:59:59.000Z

207

Model for projectile fragmentation: case study for Ni on Ta, Be and Xe on Al  

E-Print Network [OSTI]

For projectile fragmentation we work out details of a model whose origin can be traced back to the Bevalac era. The model positions itself between the phenomenological EPAX parametrization and microscopic transport models like "Heavy Ion Phase Space Exploration Model" (HIPSE) and antisymmetrised molecular dynamics(AMD). We apply the model to some recent data of projectile fragmentation of Ni on Ta and Be at beam energy 140 MeV/nucleon and some older data of Xe on Al at beam energy 790 MeV/nucleon. Reasonable values of cross-sections for various composites populated in the reactions are obtained.

S. Mallik; G. Chaudhuri; S. Das Gupta

2010-12-30T23:59:59.000Z

208

The Carina Flare: What can fragments in the wall tell us?  

E-Print Network [OSTI]

$^{13}$CO(J=2--1) and C$^{18}$O(J=2--1) observations of the molecular cloud G285.90+4.53 (Cloud~16) in the Carina Flare supershell (GSH287+04-17) with the APEX telescope are presented. With an algorithm DENDROFIND we identify 51 fragments and compute their sizes and masses. We discuss their mass spectrum and interpret it as being the result of the shell fragmentation process described by the pressure assisted gravitational instability - PAGI. We conclude that the explanation of the clump mass function needs a combination of gravity with pressure external to the shell.

Wunsch, Richard; Sidorin, Vojtech; Ehlerova, Sona; Palous, Jan; Dale, James; Dawson, Joanne R; Fukui, Yasuo

2011-01-01T23:59:59.000Z

209

Endocrine disrupting chemicals affect the adipogenic differentiation of mesenchymal stem cells in distinct ontogenetic windows  

SciTech Connect (OSTI)

Highlights: Black-Right-Pointing-Pointer Endocrine disrupting chemicals affect adipogenesis in mesenchymal stem cells (MSC). Black-Right-Pointing-Pointer The adipogenic impact depends strongly on the window of exposure. Black-Right-Pointing-Pointer Bisphenol A reduces the potential of MSC to differentiate into adipocytes. Black-Right-Pointing-Pointer DEHP and TBT trigger the adipogenic differentiation of mesenchymal stem cells. Black-Right-Pointing-Pointer BPA, DEHP and TBT did not affect adipogenesis in embryonic stem cells. -- Abstract: Endocrine disrupting chemicals (EDC) like bisphenol A (BPA), bis(2-ethylhexyl)phthalate (DEHP) and tributyltin (TBT) are ubiquitously present in the environment and in human tissues. They bind to nuclear hormone receptors and affect cellular and developmental processes. In this study, we show that BPA, DEHP and TBT affect the adipogenic differentiation of murine mesenchymal stem cells (MSC, C3H/10T1/2) in a concentration-, stage- and compound-specific manner. C3H/10T1/2 cells and embryonic stem cells (CGR8) were exposed to BPA, DEHP or TBT at different stages of cell determination and differentiation (undifferentiated growth, adipogenic induction and terminal adipogenic differentiation). The final amount of differentiated adipocytes, cellular triglyceride content and mRNA expression of adipogenic marker genes (adiponectin, FABP4, PPAR{gamma}2, LPL) were quantified and compared with corresponding unexposed cells. BPA (10 {mu}M) decreased subsequent adipogenic differentiation of MSC, when cells were exposed during undifferentiated growth. In contrast, DEHP (100 {mu}M) during the hormonal induction period, and TBT (100 nM) in all investigated stages, enhanced adipogenesis. Importantly, exposure of undifferentiated murine embryonic stem cells did not show any effect of the investigated EDC on subsequent adipogenic differentiation.

Biemann, Ronald, E-mail: ronald.biemann@medizin.uni-halle.de [Department of Anatomy and Cell Biology, Martin Luther University, Faculty of Medicine, Halle (Germany)] [Department of Anatomy and Cell Biology, Martin Luther University, Faculty of Medicine, Halle (Germany); Navarrete Santos, Anne [Department of Anatomy and Cell Biology, Martin Luther University, Faculty of Medicine, Halle (Germany)] [Department of Anatomy and Cell Biology, Martin Luther University, Faculty of Medicine, Halle (Germany); Navarrete Santos, Alexander [Department of Cardiothoracic Surgery, Martin Luther University, Faculty of Medicine, Halle (Germany)] [Department of Cardiothoracic Surgery, Martin Luther University, Faculty of Medicine, Halle (Germany); Riemann, Dagmar [Department of Immunology, Martin Luther University, Faculty of Medicine, Halle (Germany)] [Department of Immunology, Martin Luther University, Faculty of Medicine, Halle (Germany); Knelangen, Julia [Department of Anatomy and Cell Biology, Martin Luther University, Faculty of Medicine, Halle (Germany)] [Department of Anatomy and Cell Biology, Martin Luther University, Faculty of Medicine, Halle (Germany); Blueher, Matthias [Department of Medicine, University of Leipzig, Leipzig (Germany)] [Department of Medicine, University of Leipzig, Leipzig (Germany); Koch, Holger [Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Ruhr-University Bochum, Bochum (Germany)] [Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Ruhr-University Bochum, Bochum (Germany); Fischer, Bernd [Department of Anatomy and Cell Biology, Martin Luther University, Faculty of Medicine, Halle (Germany)] [Department of Anatomy and Cell Biology, Martin Luther University, Faculty of Medicine, Halle (Germany)

2012-01-13T23:59:59.000Z

210

Solvent dramatically affects protein structure refinement  

E-Print Network [OSTI]

Solvent dramatically affects protein structure refinement Gaurav Chopraa , Christopher M. Summab structure), also known as the protein structure refinement problem. It has been shown that improve- ment in protein structure refinement. Molecular dynamics in explicit sol- vent and energy minimization in both

Summa, Christopher M.

211

Environmental Triggers that Affect Children's Health  

E-Print Network [OSTI]

Environmental Triggers that Affect Children's Health A Clean Environment Can Lead to Better Health! An online course for child care providers and parents, presented by the Texas AgriLife Extension Service Children's Health Course developed by Janie L. Harris, M.Ed. Extension Housing and Environment Specialist

212

Does Daylight Savings Time Affect Traffic Accidents?  

E-Print Network [OSTI]

This paper studies the effect of changes in accident pattern due to Daylight Savings Time (DST). The extension of the DST in 2007 provides a natural experiment to determine whether the number of traffic accidents is affected by shifts in hours...

Deen, Sophia 1988-

2012-04-20T23:59:59.000Z

213

Environmental issues affecting clean coal technology deployment  

SciTech Connect (OSTI)

The author outlines what he considers to be the key environmental issues affecting Clean Coal Technology (CCT) deployment both in the US and internationally. Since the international issues are difficult to characterize given different environmental drivers in various countries and regions, the primary focus of his remarks is on US deployment. However, he makes some general remarks, particularly regarding the environmental issues in developing vs. developed countries and how these issues may affect CCT deployment. Further, how environment affects deployment depends on which particular type of clean coal technology one is addressing. It is not the author`s intention to mention many specific technologies other than to use them for the purposes of example. He generally categorizes CCTs into four groups since environment is likely to affect deployment for each category somewhat differently. These four categories are: Precombustion technologies such as coal cleaning; Combustion technologies such as low NOx burners; Postcombustion technologies such as FGD systems and postcombustion NOx control; and New generation technologies such as gasification and fluidized bed combustion.

Miller, M.J. [Electric Power Research Inst., Palo Alto, CA (United States)

1997-12-31T23:59:59.000Z

214

Ion fragmentation in an electrospray ionization mass spectrometer interface with different gases  

E-Print Network [OSTI]

in the gas phase. However, particularly in multi- component samples, this may not be enough to unambigu predicts that the degree of ion fragmentation increases with increasing mass of the curtain gas. However with argon and krypton is caused by condensation of the gases within the free jet expansion between

Chen, David D.Y.

215

Secure Fragment Allocation in a Distributed Storage System with Heterogeneous Vulnerabilities  

E-Print Network [OSTI]

Secure Fragment Allocation in a Distributed Storage System with Heterogeneous Vulnerabilities Yun--There is a growing demand for large-scale dis- tributed storage systems to support resource sharing and fault attention has yet been paid to security solutions designed for distributed storage systems

Qin, Xiao

216

Centrality and Energy Dependence of Proton, Light Fragment and Hyperon Production  

E-Print Network [OSTI]

Recent results of the NA49 collaboration are discussed. These include the energy dependence of stopping and the production of the light fragments t and 3He. New data on the system size dependence of hyperon production at 40A and 158AGeV are also presented.

C. Blume

2007-02-06T23:59:59.000Z

217

Immunolocalization of an Amino-Terminal Fragment of Apolipoprotein E in the Pick's Disease Brain  

E-Print Network [OSTI]

this fragment was observed in PiD cases harboring the APOENPD Braak and Braak Plaque Stage F N/A PiD Stage 0 NoneM N/A PiD Stage 0 None F PiD Stage 0 None M PiD Stage 0 None

2013-01-01T23:59:59.000Z

218

Modeling the age of tropical moist forest fragments in heavily-cleared lowland landscapes of Colombia  

E-Print Network [OSTI]

of Colombia Andres Etter a,b,c,*, Clive McAlpine a,b , David Pullar b , Hugh Possingham a a The Ecology Centre-00, Bogota´, Colombia Received 31 August 2004; received in revised form 7 December 2004; accepted 7 December deforestation; Forest fragment age; Land use drivers; Colombia www.elsevier.com/locate/foreco Forest Ecology

Queensland, University of

219

Service Oriented Architecture Definition Using Composition of BusinessDriven Fragments  

E-Print Network [OSTI]

Service Oriented Architecture Definition Using Composition of Business­Driven Fragments S. Services Oriented Architecture are built through the compo- sition of services (e.g. Web Services to implement scalable Soa (Services Oriented Architecture, [2]) under the Wsoa acronym (Web Services Oriented

Paris-Sud XI, Université de

220

Fiber Depolymerization: Fracture, Fragments, Vanishing Times and Stochastics in Sickle Jiang Cheng Wang*  

E-Print Network [OSTI]

-dependent polymerization of deoxyhemoglobin S (HbS) are important in governing whether or not vaso- occlusive sickle cell event in sickle cell disease, to pathogenesis lies in manifold effects: contributions to microvascularFiber Depolymerization: Fracture, Fragments, Vanishing Times and Stochastics in Sickle Hemoglobin

Turner, Matthew

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

Self-Assembling Tile Systems that Heal from Small Fragments Stanford University  

E-Print Network [OSTI]

Self-Assembling Tile Systems that Heal from Small Fragments Holin Chen Stanford University holin systems have proved to be a useful model for understanding self-assembly at the nano scale. Self-healing tile systems, introduced by Winfree, have the property that the self-assembled shape can recover from

Goel, Ashish

222

Estimates for temperature in projectile like fragment in geometric and transport models  

E-Print Network [OSTI]

Projectile like fragments emerging from heavy ion collision have an excitation energy which is often labeled by a temperature. This temperature was recently calculated using a geometric model. We expand the geometric model to include also dynamic effects using a transport model. The temperatures so deduced agree quite well with values of temperature needed to fit experimental data.

Mallik, S; Chaudhuri, G

2013-01-01T23:59:59.000Z

223

Peatland fragments of southern Quebec: recent evolution of their vegetation structure  

E-Print Network [OSTI]

within an agricultural plain for more than 100 years may explain the afforestation process (drainage animaux. Est-ce que ces fragments sont de véritables refuges? Maintiennent-ils leurs caractéristiques'expliquer par l'isolement des tourbières au sein d'une plaine agricole depuis plus de 100 ans (drainage). De

224

New fission fragment distributions and r-process origin of the rare-earth elements  

E-Print Network [OSTI]

Neutron star (NS) merger ejecta offer a viable site for the production of heavy r-process elements with nuclear mass numbers A > 140. The crucial role of fission recycling is responsible for the robustness of this site against many astrophysical uncertainties, but calculations sensitively depend on nuclear physics. In particular the fission fragment yields determine the creation of 110 140.

Goriely, S; Lemaitre, J -F; Panebianco, S; Dubray, N; Hilaire, S; Bauswein, A; Janka, H -Thomas

2013-01-01T23:59:59.000Z

225

Breathing coherent phonons and caps fragmentation in carbon nanotubes following ultrafast laser pulses  

E-Print Network [OSTI]

driven by ultrafast laser pulses.1­3 The necessary conditions for generating such coherent phonons are i is larger than the duration of currently available ultrafast pulses. ii Measurements4­7 determinedBreathing coherent phonons and caps fragmentation in carbon nanotubes following ultrafast laser

Dumitrica,Traian

226

Fragmentation and Dispersion of Reactive Metal Systems Amy Adams, University of Florida, IREP 2010 Fellow  

E-Print Network [OSTI]

of this study. Each setup used Aluminum rings with dimensions of 30mm o.d by 22 mm i.d by 4 mm thickness the detonator holder at known heights, and a Perspex (PMMA) spacer between the Al ring and the explosive, and used an opaque acetal cap instead of a spacer, wax instead of sand for softcatching of fragments

Li, Mo

227

Volume 17 1, number 4 CHEMICAL PHYSICS LETTERS 10 August 1990 Sublimation versus fragmentation  

E-Print Network [OSTI]

Volume 17 1, number 4 CHEMICAL PHYSICS LETTERS 10 August 1990 Sublimation versus fragmentation in matrix-assisted laser desorption A. Vertes Department of Chemistry, University ofAntwerp (MA to potentially rapid destruction of the host matrix. Two separate mechanisms are considered, sublimation

Vertes, Akos

228

Universality of Fragmentation in the Schrödinger Dynamics of Bosonic Josephson Junctions  

E-Print Network [OSTI]

The many-body Schr\\"odinger dynamics of a one-dimensional bosonic Josephson junction is investigated for up to ten thousand bosons and long times. The initial states are fully condensed and the interaction strength is weak. We report on a universal fragmentation dynamics on the many-body level: systems consisting of different numbers of particles fragment to the same value at constant mean-field interaction strength. The phenomenon manifests itself in observables such as the correlation functions of the system. We explain this universal fragmentation dynamics analytically based on the Bose-Hubbard model. We thereby show that the extent to which many-body effects become important at later times depends crucially on the initial state. Even for arbitrarily large particle numbers and arbitrarily weak interaction strength the dynamics is many-body in nature and the fragmentation universal. There is no weakly interacting limit where the Gross-Piatevskii mean-field is valid for long times.

Kaspar Sakmann; Alexej I. Streltsov; Ofir E. Alon; Lorenz S. Cederbaum

2014-05-14T23:59:59.000Z

229

Scale dependence in multitemporal mapping of forest fragmentation in Bolivia: implications for explaining temporal  

E-Print Network [OSTI]

Scale dependence in multitemporal mapping of forest fragmentation in Bolivia: implications, Bolivia Received 8 April 2002; accepted 21 October 2002 Abstract Landsat TM and ETM data were used building, agricultural colonisation and hydrocarbon exploration in Chapare (Bolivia) since the 1980s were

230

SPONTANEOUS CURRENT-LAYER FRAGMENTATION AND CASCADING RECONNECTION IN SOLAR FLARES. I. MODEL AND ANALYSIS  

SciTech Connect (OSTI)

Magnetic reconnection is commonly considered to be a mechanism of solar (eruptive) flares. A deeper study of this scenario reveals, however, a number of open issues. Among them is the fundamental question of how the magnetic energy is transferred from large, accumulation scales to plasma scales where its actual dissipation takes place. In order to investigate this transfer over a broad range of scales, we address this question by means of a high-resolution MHD simulation. The simulation results indicate that the magnetic-energy transfer to small scales is realized via a cascade of consecutively smaller and smaller flux ropes (plasmoids), analogous to the vortex-tube cascade in (incompressible) fluid dynamics. Both tearing and (driven) 'fragmenting coalescence' processes are equally important for the consecutive fragmentation of the magnetic field (and associated current density) into smaller elements. At the later stages, a dynamic balance between tearing and coalescence processes reveals a steady (power-law) scaling typical of cascading processes. It is shown that cascading reconnection also addresses other open issues in solar-flare research, such as the duality between the regular large-scale picture of (eruptive) flares and the observed signatures of fragmented (chaotic) energy release, as well as the huge number of accelerated particles. Indeed, spontaneous current-layer fragmentation and the formation of multiple channelized dissipative/acceleration regions embedded in the current layer appear to be intrinsic to the cascading process. The multiple small-scale current sheets may also facilitate the acceleration of a large number of particles. The structure, distribution, and dynamics of the embedded potential acceleration regions in a current layer fragmented by cascading reconnection are studied and discussed.

Barta, Miroslav; Buechner, Joerg [Max Planck Institute for Solar System Research, D-37191 Katlenburg-Lindau (Germany); Karlicky, Marian; Skala, Jan, E-mail: barta@mps.mpg.de [Astronomical Institute of the Academy of Sciences of the Czech Republic, CZ-25165 Ondrejov (Czech Republic)

2011-08-10T23:59:59.000Z

231

A methodology for the evaluation of the turbine jet engine fragment threat to generic air transportable containers  

SciTech Connect (OSTI)

Uncontained, high-energy gas turbine engine fragments are a potential threat to air-transportable containers carried aboard jet aircraft. The threat to a generic example container is evaluated by probability analyses and penetration testing to demonstrate the methodology to be used in the evaluation of a specific container/aircraft/engine combination. Fragment/container impact probability is the product of the uncontained fragment release rate and the geometric probability that a container is in the path of this fragment. The probability of a high-energy rotor burst fragment from four generic aircraft engines striking one of the containment vessels aboard a transport aircraft is approximately 1.2 {times} 10{sup {minus}9} strikes/hour. Finite element penetration analyses and tests can be performed to identify specific fragments which have the potential to penetrate a generic or specific containment vessel. The relatively low probability of engine fragment/container impacts is primarily due to the low release rate of uncontained, hazardous jet engine fragments.

Harding, D.C.; Pierce, J.D.

1993-06-01T23:59:59.000Z

232

EO 13211: Regulations That Significantly Affect Energy Supply...  

Energy Savers [EERE]

1: Regulations That Significantly Affect Energy Supply, Distribution, or Use EO 13211: Regulations That Significantly Affect Energy Supply, Distribution, or Use I am requiring that...

233

affects vegf distribution: Topics by E-print Network  

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

Application: n Enderton, Herbert B. 87 Gas Phase Processes Affecting Galactic Evolution Astrophysics (arXiv) Summary: Gas processes affecting star formation are...

234

affect synaptic distribution: Topics by E-print Network  

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

pulse arrival at low rates have Richardson, Magnus 3 Factors affecting wild turkey distribution and numbers Texas A&M University - TxSpace Summary: FACTORS AFFECTING...

235

affecting critical factors: Topics by E-print Network  

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

social responsibility implementation: an emphasis on values 5 Factors affecting wild turkey distribution and numbers Texas A&M University - TxSpace Summary: FACTORS AFFECTING...

236

Factors Affecting HCCI Combustion Phasing for Fuels with Single...  

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

Affecting HCCI Combustion Phasing for Fuels with Single- and Dual-Stage Chemistry Factors Affecting HCCI Combustion Phasing for Fuels with Single- and Dual-Stage Chemistry 2004...

237

Factors Affecting the Battery Performance of Anthraquinone-based...  

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

Affecting the Battery Performance of Anthraquinone-based Organic Cathode Materials. Factors Affecting the Battery Performance of Anthraquinone-based Organic Cathode Materials....

238

Proinsulin maturation disorder is a contributor to the defect of subsequent conversion to insulin in {beta}-cells  

SciTech Connect (OSTI)

Highlights: {yields} Primary proinsulin maturation disorder is inherent in Ins2{sup +/Akita} islets/{beta}-cells. {yields} A consequence is the inefficient conversion of proinsulin to insulin. {yields} Post-translational defects occur as well in the involved PC1/3 and PC2 convertases. {yields} Proinsulin maturation chaos results in defects in the following conversion process. {yields} A link of the proinsulin maturation disorder and hyperproinsulinemia is suggested. -- Abstract: Disproportionate hyperproinsulinemia is an indicator of {beta}-cell dysfunction in diabetes and the basis underlying this abnormality remains obscure. Recently, we have found proinsulin is an aggregation-prone molecule inherent with a low relative folding rate and maintains a homeostatic balance of natively and plentiful non-natively folded states (i.e., proinsulin homeostasis, PIHO) in normal {beta}-cells as a result of the integration of maturation and disposal processes. PIHO is susceptible to environmental and genetic influences. Perturbation of PIHO produces a number of toxic consequences with known association to {beta}-cell failure in diabetes. To explore whether the perturbation of PIHO has a link to disproportionate hyperproinsulinemia, we investigated proinsulin conversion and the involved prohormone convertase 1/3 (PC1/3) and 2 (PC2) in mouse Ins2{sup +/Akita} islets/{beta}-cells that preserve a primary PIHO disorder due to a mutation (C96Y) in the insulin 2 (Ins2) gene. Our metabolic-labeling studies found an increased ratio of proinsulin to insulin in the cellular or released proteins of Ins2{sup +/Akita} islets. Histological, metabolic-labeling, and RT-PCR analyses revealed decreases of the PC1/3 and PC2 immunoreactivities in the {beta}-cells of Ins2{sup +/Akita} islets in spite of no declines of these two convertases at the transcriptional and translational levels. Immunoblot analyses in cloned Ins2{sup +/Akita} {beta}-cells further confirmed the increased ratio of proinsulin to insulin despite the levels of PC1/3 and PC2 proteins were not reduced somehow. The findings demonstrate that the perturbation of PIHO results in defects in the subsequent conversion process of proinsulin and is a contributor to the occurrence of disproportionate hyperproinsulinemia in diabetes.

Wang, Jie, E-mail: jie.wang2@osumc.edu [Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, The Ohio State University, Columbus, OH (United States)] [Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, The Ohio State University, Columbus, OH (United States); Osei, Kwame [Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, The Ohio State University, Columbus, OH (United States)] [Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, The Ohio State University, Columbus, OH (United States)

2011-07-22T23:59:59.000Z

239

Exporting licensing regulations affecting US geothermal firms  

SciTech Connect (OSTI)

This document presents a brief introduction and overview of the Department of Commerce's Export Administration Regulations which might affect potential US geothermal goods exporters. It is intended to make US geothermal firms officials aware of the existence of such regulations and to provide them with references, contacts and phone numbers where they can obtain specific and detailed information and assistance. It must be stressed however, that the ultimate responsibility for complying with the above mentioned regulations lies with the exporter who must consult the complete version of the regulations.

Not Available

1988-08-01T23:59:59.000Z

240

Automatic scanning of nuclear emulsions with wide-angle acceptance for nuclear fragment detection  

E-Print Network [OSTI]

Nuclear emulsion, a tracking detector with sub-micron position resolution, has played a successful role in the field of particle physics and the analysis speed has been substantially improved by the development of automated scanning systems. This paper describes a newly developed automated scanning system and its application to the analysis of nuclear fragments emitted almost isotropically in nuclear evaporation. This system is able to recognize tracks of nuclear fragments up to |tan{\\theta}|nuclear emulsion is the first trial. Furthermore the track recognition algorithm is performed by a powerful Graphics Processing Unit (GPU) for the first time. This GPU has a sufficient computing power to process large area scanning data with a wide angular acceptance and enough flexibil...

Fukuda, T; Ishida, H; Kodama, K; Matsuo, T; Mikado, S; Ogawa, S; Shibuya, H; Sudo, J

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

Corrosion/Fragmentation of Layered Composite Cathode and Related Capacity/Voltage Fading during Cycling Process  

SciTech Connect (OSTI)

Pristine and cycled layered structure cathode of Li[Li0.2Ni0.2M0.6]O2 samples are characterized by aberration-corrected scanning transmission electron microscopy and electron energy loss spectroscopy. These analyses provide new insights on capacity/voltage fading mechanism of Li[Li0.2Ni0.2M0.6]O2. Sponge-like structure and fragment pieces were found on the surface of cathode after cycling. Mn2+ species and reduced Li content in the fragments caused significant capacity loss. These results also reveal the functional mechanism of surface coatings, e.g. AlF3, which can protect the electrode from etching by acidic species in the electrolyte, suppress cathode degradation and improve long-term cycling stability.

Zheng, Jianming; Gu, Meng; Xiao, Jie; Zuo, Pengjian; Wang, Chong M.; Zhang, Jiguang

2013-06-26T23:59:59.000Z

242

Lattice gas model for fragmentation: From Argon on Scandium to Gold on Gold  

E-Print Network [OSTI]

The recent fragmentation data for central collisions of Gold on Gold are even qualitatively different from those for central collisions of Argon on Scandium. The latter can be fitted with a lattice gas model calculation. Effort is made to understand why the model fails for Gold on Gold. The calculation suggests that the large Coulomb interaction which is operative for the larger system is responsible for this discrepancy. This is demonstrated by mapping the lattice gas model to a molecular dynamics calculation for disassembly. This mapping is quite faithful for Argon on Scandium but deviates strongly for Gold on Gold. The molecular dynamics calculation for disassembly reproduces the characteristics of the fragmentation data for both Gold on Gold and Argon on Scandium.

Subal Das Gupta; Jicai Pan

1995-12-20T23:59:59.000Z

243

Bottom-quark fragmentation: comparing results from tuned event generators and resummed calculations  

E-Print Network [OSTI]

We study bottom-quark fragmentation in e+e- annihilation, top and Higgs decay H -> b bbar, using Monte Carlo event generators, as well as calculations, based on the formalism of perturbative fragmentation functions, which resum soft- and collinear-radiation effects in the next-to-leading logarithmic approximation. We consider the PYTHIA and HERWIG generators, and implement matrix-element corrections to the parton shower simulation of the H -> b bbar process in HERWIG. We tune the Kartvelishvili, string and cluster models to B-hadron data from LEP and SLD, and present results in both x_B and moment spaces. The B-hadron spectra yielded by HERWIG, PYTHIA and resummed calculations show small discrepancies, which are due to the different approaches and models employed and to the quality of the fits to the e+e- data.

Gennaro Corcella; Volker Drollinger

2005-11-23T23:59:59.000Z

244

Explosive fragmentation of oil shale: Results from Colony and Anvil Points Mines, Colorado  

SciTech Connect (OSTI)

From 1978 through 1983, numerous oil shale fragmentation tests were conducted at the Colony and Anvil Points Mines, Colorado. These experiments were part of an investigation to determine factors required for the adequate fragmentation of oil shale and to evaluate the feasibility of using the vertical modified in situ retort (VMIS) method for recovery of kerogen from oil shale. The objective of this research was to support the design of a large volume (10{sup 4} m{sup 3}) rubble bed for in situ processing. In addition, this rubble bed was to be formed in a large single-blast event which included decked charges, time delays, and multiple boreholes. Results are described.

Dick, R.D.; Fourney, W.L. [Maryland Univ., College Park, MD (United States). Dept. of Mechanical Engineering] [Maryland Univ., College Park, MD (United States). Dept. of Mechanical Engineering; Young, C. III [Sunburst Recovery, Inc., Steamboat Springs, CO (United States)] [Sunburst Recovery, Inc., Steamboat Springs, CO (United States)

1992-12-31T23:59:59.000Z

245

About the determination of critical exponents related to possible phase transitions in nuclear fragmentation  

E-Print Network [OSTI]

We introduce a method based on the finite size scaling assumption which allows to determine numerically the critical point and critical exponents related to observables in an infinite system starting from the knowledge of the observables in finite systems. We apply the method to bond percolation in 2 dimensions and compare the results obtained when the bond probability p or the fragment multiplicity m are chosen as the relevant parameter.

B. Elattari; J. Richert; P. Wagner

1997-05-30T23:59:59.000Z

246

Variability in desert bighorn and Rambouillet sheep using restriction fragment length polymorphisms  

E-Print Network [OSTI]

if bighorn populations are existing in a high quality habitat, a lack of healthy offspring with a lack of adaptability to the environment will certainly be counterproductive in maintaining the already low numbers of these sheep. Previous Research...VARIABILITY IN DESERT BIGHORN AND RAMBOUILLET SHEEP USING RESTRICTION FRAGMENT LENGTH POLYMORPHISMS A Thesis by INGRID DOODEHEEFVER LYLES Approved as to style and content by: Ja es E. Womack (Char of Committee) Joe W. Templeto (Member) ry...

Lyles, Ingrid Doodeheefver

1989-01-01T23:59:59.000Z

247

Automatic detection of bone fragments in poultry using multi-energy x-rays  

DOE Patents [OSTI]

At least two linear arrays of x-ray detectors are placed below a conveyor belt in a poultry processing plant. Multiple-energy x-ray sources illuminate the poultry and are detected by the detectors. Laser profilometry is used to measure the poultry thickness as the x-ray data is acquired. The detector readout is processed in real time to detect the presence of small highly attenuating fragments in the poultry, i.e., bone, metal, and cartilage.

Gleason, Shaun S. (Knoxville, TN); Paulus, Michael J. (Knoxville, TN); Mullens, James A. (Knoxville, TN)

2002-04-09T23:59:59.000Z

248

The response of self-graviting protostellar discs to slow reduction in cooling timescale: the fragmentation boundary revisited  

E-Print Network [OSTI]

A number of previous studies of the fragmentation of self-gravitating protostellar discs have modeled radiative cooling with a cooling timescale (t_{cool}) parameterised as a simple multiple (beta_{cool}) of the local dynamical timescale. Such studies have delineated the `fragmentation boundary' in terms of a critical value of beta_{cool} (beta_{crit}), where the disc fragments if beta_{cool} < beta_{crit}. Such an approach however begs the question of how in reality a disc could ever be assembled with beta_{cool} < beta_{crit}. Here we adopt the more realistic approach of gradually reducing beta_{cool}, as might correspond to changes in thermal regime due to secular changes in the disc density profile. We find that when beta_{cool} is gradually reduced (on a timescale longer than t_{cool}), the disc is stabilised against fragmentation, compared with models in which beta_{cool} is reduced rapidly. We therefore conclude that a disc's ability to remain in a self-regulated, self-gravitating state (without fragmentation) is partly dependent on its thermal history, as well as its current cooling rate. Nevertheless, a slow reduction in t_{cool} appears only to lower the fragmentation boundary by about a factor two in t_{cool} and thus only permits maximum alpha values (parameterising the efficiency of angular momentum transfer in the disc) that are about a factor two higher than determined hitherto. Our results therefore do not undermine the notion of a fundamental upper limit to the heating rate that can be delivered by gravitational instabilities before the disc is subject to fragmentation. An important implication of this work, therefore, is that self-gravitating discs can enter into the regime of fragmentation via secular evolution and it is not necessary to invoke rapid (impulsive) events to trigger fragmentation.

C. Clarke; E. Harper-Clark; G. Lodato

2007-08-06T23:59:59.000Z

249

Dynamical interpretation of average fission-fragment kinetic energy systematics and nuclear scission  

SciTech Connect (OSTI)

A dynamical interpretation of the well-known systematics for average total kinetic energy of fission fragments over a wide range of the Coulomb parameter (600 on the Coulomb parameter. The results of dynamical calculations of within three-dimensional Langevin dynamics show that the mean distance between the centers of mass of nascent fragments at the scission configuration increases linearly with the parameter Z{sup 2}/A{sup 1/3}. This distance changes approximately from 2.35R{sub 0} for {sup 119}Xe to 2.6R{sub 0} for {sup 256}Fm. In spite of this increase in mean distance between future fragments at scission, the linear dependence of on the parameter Z{sup 2}/A{sup 1/3} remains approximately valid over a wide range of the Coulomb parameter Z{sup 2}/A{sup 1/3}.

Nadtochy, P.N. [GSI, Plankstrasse 1, D-64291 Darmstadt (Germany); Omsk State University, Department of Theoretical Physics, Mira Prospect 55-A, RU-644077 Omsk (Russian Federation); Adeev, G.D. [Omsk State University, Department of Theoretical Physics, Mira Prospect 55-A, RU-644077 Omsk (Russian Federation)

2005-11-01T23:59:59.000Z

250

Automatic scanning of nuclear emulsions with wide-angle acceptance for nuclear fragment detection  

E-Print Network [OSTI]

Nuclear emulsion, a tracking detector with sub-micron position resolution, has played a successful role in the field of particle physics and the analysis speed has been substantially improved by the development of automated scanning systems. This paper describes a newly developed automated scanning system and its application to the analysis of nuclear fragments emitted almost isotropically in nuclear evaporation. This system is able to recognize tracks of nuclear fragments up to |tan{\\theta}|nuclear emulsion is the first trial. Furthermore the track recognition algorithm is performed by a powerful Graphics Processing Unit (GPU) for the first time. This GPU has a sufficient computing power to process large area scanning data with a wide angular acceptance and enough flexibility to allow the tuning of the recognition algorithm. This new system will in particular be applied in the framework of the OPERA experiment : the background in the sample of tau decay candidates due to hadronic interactions will be reduced by a better detection of the emitted nuclear fragments.

T. Fukuda; S. Fukunaga; H. Ishida; K. Kodama; T. Matsuo; S. Mikado; S. Ogawa; H. Shibuya; J. Sudo

2013-01-09T23:59:59.000Z

251

Probing conformational states of glutaryl-CoA dehydrogenase by fragment screening  

SciTech Connect (OSTI)

Glutaric acidemia type 1 is an inherited metabolic disorder which can cause macrocephaly, muscular rigidity, spastic paralysis and other progressive movement disorders in humans. The defects in glutaryl-CoA dehydrogenase (GCDH) associated with this disease are thought to increase holoenzyme instability and reduce cofactor binding. Here, the first structural analysis of a GCDH enzyme in the absence of the cofactor flavin adenine dinucleotide (FAD) is reported. The apo structure of GCDH from Burkholderia pseudomallei reveals a loss of secondary structure and increased disorder in the FAD-binding pocket relative to the ternary complex of the highly homologous human GCDH. After conducting a fragment-based screen, four small molecules were identified which bind to GCDH from B. pseudomallei. Complex structures were determined for these fragments, which cause backbone and side-chain perturbations to key active-site residues. Structural insights from this investigation highlight differences from apo GCDH and the utility of small-molecular fragments as chemical probes for capturing alternative conformational states of preformed protein crystals.

Begley, Darren W.; Davies, Douglas R.; Hartley, Robert C.; Hewitt, Stephen N.; Rychel, Amanda L.; Myler, Peter J.; Van Voorhis, Wesley C.; Staker, Bart L.; Stewart, Lance J. (Emerald)

2014-10-02T23:59:59.000Z

252

Can STAR $p+p$ data help constrain fragmentation functions for strange hadrons  

E-Print Network [OSTI]

STAR has measured a variety of strange particle species in $p+p$ collisions at $\\sqrt{s}$=200 GeV. These high statistics data are ideal for comparing to existing leading- and next-to-leading order perturbative QCD (pQCD) models. Leading-order (LO) models such as PYTHIA need to be tuned to describe identified strange particle data from STAR. We show that tuned PYTHIA can also describe the pt-spectra of strange resonances. More rigorous Next-to-Leading order pQCD calculations using parameterized fragmentation functions for quarks and gluons will also be compared to STAR data. The OPAL experiment has recently released $e^{+}e^{-}$ data from light quark flavor tagged analyses allowing for the first time to make precise parameterizations of light flavor separated fragmentation function. We show that our Lambda data put a more stringent constraint on the gluon fragmentation function than $e^{+}e^{-}$ data. Furthermore we show that pQCD fails to describe the observed enhancement of baryon-to-meson ratio at intermediate pt (2-6 GeV/c), which may be a first indication of other, non-perturbative mechanisms at play in $p+p$ collisions at that momentum.

Mark Heinz

2006-06-09T23:59:59.000Z

253

Nonlinear Evolution of Gravitational Fragmentation Regulated by Magnetic Fields and Ambipolar Diffusion  

E-Print Network [OSTI]

We present results from an extensive set of simulations of gravitational fragmentation in the presence of magnetic fields and ambipolar diffusion. The average fragmentation spacing in the nonlinear phase of evolution is in excellent agreement with the prediction of linear perturbation theory. The time scale for nonlinear growth and runaway of the first core is $\\approx 10$ times the calculated growth time $\\taugm$ of the eigenmode with minimum growth time, when starting from a uniform background state with small-amplitude white-noise perturbations. Subcritical and transcritical models typically evolve on a significantly longer time scale than the supercritical models. Infall motions in the nonlinear fully-developed contracting cores are subsonic on the core scale in subcritical and transcritical clouds, but are somewhat supersonic in supercritical clouds. Core mass distributions are sharply peaked with a steep decline to large masses, consistent with the existence of a preferred mass scale for each unique set of dimensionless free parameters. However, a sum total of results for various initial mass-to-flux ratios yields a broad distribution reminiscent of observed core mass distributions. Based on our results, we conclude that fragmentation spacings, magnitude of infall motions, core shapes, and, especially, the curvature of magnetic field morphology, may serve as indirect observational means of determining a cloud's ambient mass-to-flux ratio.

Shantanu Basu; Glenn E. Ciolek; James Wurster

2008-07-11T23:59:59.000Z

254

Universal parametrization of jet production based on parton and fragment rapidities  

E-Print Network [OSTI]

As the signature manifestation of QCD in high energy nuclear collisions jet production provides essential tests of that theory. But event-wise jet reconstruction can be complex and susceptible to measurement bias. And QCD theory in the form of Monte Carlo models of elementary collisions can also be complex and difficult to test. It may be beneficial to construct a simple static model of jet production in p-p collisions to facilitate data comparisons and model tests. QCD is a logarithmic theory featuring variations with energy scale of the form $\\log(s/s_0)$. Jet-related data such as parton fragmentation functions plotted on logarithmic rapidities exhibit self-similar scaling behavior which admits simple and accurate parametrization with only a few parameters. In this study we extend that method to construct a parametrization of jet (scattered parton) momentum spectra based on certain measured logarithmic jet production trends. The parametrization is established with Sp\\=pS jet data and then extrapolated for comparison with Tevatron and LHC jet data. In addition, the jet production model from the present study is combined with a parametrization of p-\\=p fragmentation functions to predict the minimum-bias jet fragment contribution to hadron $p_t$ spectra. The prediction is compared with published p-p spectrum data to test the self-consistency of the model.

Thomas A. Trainor

2014-03-14T23:59:59.000Z

255

Factors affect offshore production loss control  

SciTech Connect (OSTI)

Many aspects of petroleum measurement on an offshore production platform are the same as at an onshore facility, but there are some unique differences. Before going into them it should be noted that even in today's climate of low or declining oil prices that stock loss control is still important. Improving measurement of the quantity of oil transfers can help reduce the amount of stock that is ''unaccounted for'' or lost. As stock loss is reduced, the salable quantity increases, the gross revenue increases, and the net revenue increases. Even in cases where transfers are between two departments of the same company, accurate measurement and proper accountability are required because they often are the basis for determining costs and can thus affect the price that is charged on a later custody transfer. Inefficiencies in intracompany transfers can often hide real losses which may occur during intercompany transfers.

Ash, C.S.

1986-05-12T23:59:59.000Z

256

affecting home blood: Topics by E-print Network  

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

recent journals Astronomical they formed and despite their subsequent histories in the solar system. CfA astrophysicists XueNing Bai Walsworth, Ronald L. 15 HOME REMEDY FOR...

257

Next generation computational tools for extreme-scale simulation of dynamic fracture and fragmentation in three dimensions  

E-Print Network [OSTI]

The accurate modeling of dynamic fracture and fragmentation remains one of the most difficult challenges in computational mechanics research. As part of this thesis, a scalable algorithm for modeling dynamic fracture and ...

Seagraves, Andrew Nathan

2013-01-01T23:59:59.000Z

258

MID-INFRARED SPECTROPHOTOMETRIC OBSERVATIONS OF FRAGMENTS B AND C OF COMET 73P/SCHWASSMANN-WACHMANN 3  

SciTech Connect (OSTI)

We present mid-infrared spectra and images from the Gemini-N (+ Michelle) observations of fragments SW3-[B] and SW3-[C] of the ecliptic (Jupiter family) comet 73P/Schwassmann-Wachmann 3 pre-perihelion. We observed fragment B soon after an outburst event (between 2006 April 16-26 UT) and detected crystalline silicates. The mineralogy of both fragments was dominated by amorphous carbon and amorphous pyroxene. The grain size distribution (assuming a Hanner-modified power law) for fragment SW3-[B] has a peak grain radius of a{sub p} {approx} 0.5 {mu}m, and for fragment SW3-[C], a{sub p} {approx} 0.3 {mu}m; both values are larger than the peak grain radius of the size distribution for the dust ejected from ecliptic comet 9P/Tempel 1 during the Deep Impact event (a{sub p} = 0.2 {mu}m). The silicate-to-carbon ratio and the silicate crystalline mass fraction for the submicron to micron-sized portion of the grain size distribution on the nucleus of fragment SW3-[B] were 1.341{sup +0.250}{sub -0.253} and 0.335{sup +0.089}{sub -0.112}, respectively, while on the nucleus of fragment SW3-[C] they were 0.671{sup +0.076}{sub -0.076} and 0.257{sup +0.039}{sub -0.043}, respectively. The similarity in mineralogy and grain properties between the two fragments implies that 73P/Schwassmann-Wachmann 3 is homogeneous in composition. The slight differences in grain size distribution and silicate-to-carbon ratio between the two fragments likely arise because SW3-[B] was actively fragmenting throughout its passage while the activity in SW3-[C] was primarily driven by jets. The lack of diverse mineralogy in the fragments SW3-[B] and SW3-[C] of 73P/Schwassmann-Wachmann 3 along with the relatively larger peak in the coma grain size distribution suggests that the parent body of this comet may have formed in a region of the solar nebula with different environmental properties than the natal sites where comet C/1995 O1 (Hale-Bopp) and 9P/Tempel 1 nuclei aggregated.

Harker, David E. [Center for Astrophysics and Space Sciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0424 (United States); Woodward, Charles E. [Department of Astronomy, School of Physics and Astronomy, University of Minnesota, 116 Church Street, S. E., Minneapolis, MN 55455 (United States); Kelley, Michael S. [Department of Astronomy, University of Maryland, College Park, MD 20742-2421 (United States); Sitko, Michael L. [Space Science Institute, Boulder, CO 80301 (United States); Wooden, Diane H. [NASA Ames Research Center, Space Science Division, MS 245-1, Moffett Field, CA 94035-1000 (United States); Lynch, David K. [Thule Scientific, P.O. Box 953, Topanga, CA 90290 (United States); Russell, Ray W., E-mail: dharker@ucsd.edu, E-mail: chelsea@astro.umn.edu, E-mail: diane.h.wooden@nasa.gov [Aerospace Corporation, Los Angeles, CA 90009 (United States)

2011-01-15T23:59:59.000Z

259

Identification of opaque-2 genotypes in segregating populations of quality protein maize by analysis of restriction fragment length polymorphisms  

E-Print Network [OSTI]

IDENTIFICATION OF OPAQUE-2 GENOTYPES IN SEGREGATING POPULATIONS OF QUALITY PROTEIN MAIZE BY ANALYSIS OF RESTRICTION FRAGMENT LENGTH POLYMORPHISMS A Thesis by SRINIVAS REDDY KATA Submitted to the Office of Graduate Studies of Texas Adt...M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1993 Major Subject: Genetics IDENTIFICATION OF OPAQUE-2 GENOTYPES IN SEGREGATING POPULATIONS OF QUALITY PROTEIN MAIZE BY ANALYSIS OF RESTRICTION FRAGMENT...

Kata, Srinivas Reddy

1993-01-01T23:59:59.000Z

260

The effects of phosphorous ligands on the gas phase ligand exchange reactions of dichromium ionic cluster fragments  

E-Print Network [OSTI]

THE EFFECTS OF PHOSPHORUS LIGANDS ON THE GAS PHASE LIGAND EXCHANGE REACTIONS OF DICHROMIUM IONIC CLUSTER FRAGMENTS A Thesis by HANH DUC NGUYEN Submited to the Graduate College of Texas A&M University in partial fulfillment of the requirments... for the degree of MASTER OF SCIENCE May 1991 Major Subject: Chemistry THE EFFECTS OF PHOSPHORUS LIGANDS ON THE GAS PHASE LIGAND EXCHANGE REACTIONS OF DICHROMIUM IONIC CLUSTER FRAGMENTS A Thesis by HANH DUC NGUYEN Approved as to style and content by...

Nguyen, Hanh Duc

1991-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "affects subsequent fragmentation" from the National Library of EnergyBeta (NLEBeta).
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261

Abstract Using the amplified fragment length polymor-phism (AFLP) technique combined with a "narrow-  

E-Print Network [OSTI]

Resources and Environmental Sciences, University of Illinois, 310 Madigan Building, 1201 West Gregory Drive cost, causing environ- mental pollution, and probably affecting the consumer's health

Korban, Schuyler S.

262

Factors affecting water quality in Cherokee Reservoir  

SciTech Connect (OSTI)

The purpose was to: (1) define reservoir problems related to water quality conditions; (2) identify the probable causes of these problems; and (3) recommend procedures for achieving needed reservoir water quality improvements. This report presents the project findings to date and suggests steps for upgrading the quality of Cherokee Reservoir. Section II presents background information on the characteristics of the basin, the reservoir, and the beneficial uses of the reservoir. Section III identifies the impacts of existing reservoir water quality on uses of the reservoir for water supply, fishery resources, recreation, and waste assimilation. Section IV presents an assessment of cause-effect relationships. The factors affecting water quality addressed in Section IV are: (1) reservoir thermal stratification and hydrodynamics; (2) dissolved oxygen depletion; (3) eutrophication; (4) toxic substances; and (5) reservoir fisheries. Section V presents a preliminary evaluation of alternatives for improving the quality of Cherokee Reservoir. Section VI presents preliminary conclusions and recommendations for developing and implementing a reservoir water quality management plan. 7 references, 22 figures, 21 tables.

Iwanski, M.L.; Higgins, J.M.; Kim, B.R.; Young, R.C.

1980-07-01T23:59:59.000Z

263

Coulomb and even-odd effects in cold and super-asymmetric fragmentation for thermal neutron induced fission of 235U  

E-Print Network [OSTI]

The Coulomb effects hypothesis is used to interpret even-odd effects of maximum total kinetic energy as a function of mass and charge of fragments from thermal neutron induced fission of 235U. Assuming spherical fragments at scission, the Coulomb interaction energy between fragments (C_sph) is higher than the Q-value, the available energy. Therefore at scission the fragments must be deformed, so that the Coulomb interaction energy does not exceed the Q-value. The fact that the even-odd effects in the maximum total kinetic energy as a function of the charge and mass, respectively, are lower than the even-odd effects of Q is consistent with the assumption that odd mass fragments are softer than the even-even fragments. Even-odd effects of charge distribution in super asymmetric fragmentation also are interpreted with the Coulomb effect hypothesis. Because the difference between C_sph and Q increases with asymmetry, fragmentations require higher total deformation energy to occur. Higher deformation energy of the fragments implies lower free energy to break pairs of nucleons. This explains why in the asymmetric fragmentation region, the even-odd effects of the distribution of proton number and neutron number increases with asymmetry. Based on a similar reasoning, a prediction of a relatively high even-odd effect in symmetric fragmentations is proposed.

Modesto Montoya

2015-03-23T23:59:59.000Z

264

affect postprandial factor: Topics by E-print Network  

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

may influence the decision Cheng, Yvonne 2011-01-01 3 Factors affecting wild turkey distribution and numbers Texas A&M University - TxSpace Summary: FACTORS AFFECTING...

265

affective physiological states: Topics by E-print Network  

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

Affective Lexical Resources CiteSeer Summary: Affective computing is advancing as a field that allows a new form of human computer interaction, in addition to the use of...

266

affective integration fmri: Topics by E-print Network  

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

Theses and Dissertations Summary: ??Alcohol dependence (AD) has global effects on brain structure and function, including frontolimbic regions regulating affective...

267

affect development motility: Topics by E-print Network  

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

Protozoan Predation Is Differentially Affected by Motility Environmental Sciences and Ecology Websites Summary: ENVIRONMENTAL MICROBIOLOGY Protozoan Predation Is Differentially...

268

affect functional outcome: Topics by E-print Network  

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

Keywords: Growth, Indian Politicians, Information disclosure, Regression Discontinuity, India Assistant Bandyopadhyay, Antar 4 Urban neighborhood environments and adult affective...

269

The b Quark Fragmentation Function, From LEP to TeVatron  

SciTech Connect (OSTI)

The b quark fragmentation distribution has been measured, using data registered by the DELPHI experiment at the Z pole, in the years 1994-1995. The measurement made use of 176000 inclusively reconstructed B meson candidates. The errors of this measurement are dominated by systematic effects, the principal ones being related to the energy calibration. The distribution has been established in a nine bin histogram. Its mean value has been found to be = 0.704 {+-} 0.001(stat.) {+-} 0.008(syst.). Using this measurement, and other available analyses of the b-quark fragmentation distribution in e{sup +}e{sup -} collisions, the non-perturbative QCD component of the distribution has been extracted independently of any hadronic physics modeling. This distribution depends only on the way the perturbative QCD component has been defined. When the perturbative QCD component is taken from a parton shower Monte-Carlo, the non-perturbative QCD component is rather similar with those obtained from the Lund or Bowler models. When the perturbative QCD component is the result of an analytic NLL computation, the non-perturbative QCD component has to be extended in a non-physical region and thus cannot be described by any hadronic modeling. In the two examples, used to characterize these two situations, which are studied at present, it happens that the extracted non-perturbative QCD distribution has the same shape, being simply translated to higher-x values in the second approach, illustrating the ability of the analytic perturbative QCD approach to account for softer gluon radiation than with a parton shower generator. Using all the available analyses of the b-quark fragmentation distribution in e{sup +}e{sup -} collisions, together with the result from DELPHI presented in this thesis, a combined world average b fragmentation distribution has been obtained. Its mean value has been found to be = 0.714 {+-} 0.002. An analysis of the B hadron production at CDF is ongoing. It makes use of {approx} 6000 B{sup {+-}} candidates, from 333 pb{sup -1} of data registered by the CDF experiment, fully reconstructed in the decay channel B{sup {+-}} {yields} J/{Psi}K{sup {+-}}. Characteristics of B mesons and for accompanying tracks have been examined, in the perspective of understanding the effect of fragmentation. These studies, done in the framework of the PYTHIA event generator, also involve the contributions from different b{bar b} production mechanisms. Distributions from a fully reconstructed Monte Carlo sample have been compared to data, and the agreement has been found to be reasonable. The analysis is ongoing, and the goal is to fit the fragmentation function parameters and/or the relative contributions from different production mechanisms to improve the agreement between data and Monte Carlo. A measurement of the b quark production cross section has been obtained using the same data. The analysis is still under way, and therefore the result is preliminary.

Ben-haim, Eli; /Paris U., VI-VII

2004-12-01T23:59:59.000Z

270

Review of critical factors affecting crude corrosivity  

SciTech Connect (OSTI)

Lower quality opportunity crudes are now processed in most refineries and the source of the crudes may vary daily. These feedstocks, if not properly handled, can result in reduction in service life of equipment as well as costly failure and downtime. Analytical tools are needed to predict their high temperature corrosivity toward distillation units. Threshold in total sulfur and total acid number (TAN) have been used for many years as rules of thumb for predicting crude corrosivity, However, it is now realized that they are not accurate in their predictive ability. Crudes with similar composition and comparable with respect to process considerations have been found to be entirely different in their impact on corrosion. Naphthenic acid content, sulfur content, velocity, temperature, and materials of construction are the main factors affecting the corrosion process, Despite progress made in elucidating the role of the different parameters on the crude corrosivity process, the main problem is in calculating their combined effect, especially when the corroding stream is such a complex mixture. The TAN is usually related directly to naphthenic acid content. However, discrepancies between analytical methods and interference of numerous components of the crude itself lead to unreliable reported content of naphthenic acid. The sulfur compounds, with respect to corrosivity, appear to relate more to their decomposition at elevated temperature to form hydrogen sulfide than to their total content in crude. This paper reviews the present situation regarding crude corrosivity in distillation units, with the aim of indicating the extent of available information, and areas where further research is necessary.

Tebbal, S.; Kane, R.D. [CLI International, Inc., Houston, TX (United States)

1996-08-01T23:59:59.000Z

271

Evidence of microscopic effects in fragment mass distribution in heavy ion induced fusion-fission reactions  

E-Print Network [OSTI]

Our measurements of variances ($\\sigma_{m}^2$) in mass distributions of fission fragments from fusion-fission reactions of light projectiles (C, O and F) on deformed thorium targets exhibit a sharp anomalous increase with energy near the Coulomb barrier, in contrast to the smooth variation of $\\sigma_{m}^2$ for the spherical bismuth target. This departure from expectation based on a statistical description is explained in terms of microscopic effects arising from the orientational dependence in the case of deformed thorium targets.

T. K. Ghosh; S. Pal; K. S. Gold; P. Bhattacharya

2005-06-27T23:59:59.000Z

272

Test of spin dependence in charm-quark fragmentation to D sup *  

SciTech Connect (OSTI)

We have measured the polarization of {ital D}{sup *}, the energy dependence of the polarization, and the spin-density matrix of {ital D}{sup *} in {ital e}{sup +}{ital e{minus}} annihilation at a center-of-mass energy of 29 GeV using the Time Projection Chamber detector at the SLAC storage ring PEP. In 147 pb{sup {minus}1} of data we see no strong evidence for polarization, alignment, or final-state interactions in this fragmentation process.

Aihara, H.; Alston-Garnjost, M.; Avery, R.E.; Barker, A.R.; Bauer, D.A.; Bay, A.; Belcinski, R.; Bingham, H.H.; Bloom, E.D.; Buchanan, C.D.; Caldwell, D.O.; Chao, H.; Chun, S.; Clark, A.R.; Cowan, G.D.; Crane, D.A.; Dahl, O.I.; Daoudi, M.; Derby, K.A.; Eastman, J.J.; Eberhard, P.H.; Edberg, T.K.; Eisner, A.M.; Erne, F.C.; Fairfield, K.H.; Fridman, A.; Godfrey, G.; Hauptman, J.M.; Ho, C.; Hofmann, W.; Kamae, T.; Kenney, R.W.; Khacheryan, S.; Kofler, R.R.; Lambert, D.J.; Langeveld, W.G.J.; Layter, J.G.; Lin, W.T.; Linde, F.L.; Loken, S.C.; Lu, A.; Lynch, G.R.; Lys, J.E.; Madaras, R.J.; Magnuson, B.D.; Marsiske, H.; Masek, G.E.; Mathis, L.G.; Maxfield, S.J.; Miller, E.S.; Nicol, N.A.; Nygren, D.R.; Oddone, P.J.; Oh, H.; Oyang, Y.; Paar, H.P.; Palounek, A.P.T.; Park, S.K.; Pellett, D.E.; Pripstein, M.; Ronan, M.T.; Ross, R.R.; Rouse, F.R.; Schwitkis, K.A.; Sens, J.C.; Shapiro, G.; Shen, B.C.; Smith, J.R.; Steinman, J.S.; Stephens, R.W.; Stevenson, M.L.; Stork, D.H.; Strauss, M.G.; Sullivan; (TPC/Two-Gamma Collaboration)

1991-01-01T23:59:59.000Z

273

Ranges and kinetic energies of fragments from 14.5-mev neutrons induced fission of ˛ł?U  

E-Print Network [OSTI]

for two hours were 7. 3 x 10 n/cm -sec and 4. 0 x 10 n/cm ? sec, respectively. 8 2 8 2 Absolute neutron flux can be measured if one deter- mines the absolute activity of copper monitor at the end 0 of irradiation for a known time. The A activity is re...); the semiconductor detector measurement of the energies for the charged-particle-in- duced fission of Ra and Th (5); and time-of-flight measurement of energies and velocities of fragments from U, 2 U and 3 Pu (6). One of the interesting aspects...

Desai, Rajanikant Dattatraya

2012-06-07T23:59:59.000Z

274

New fission fragment distributions and r-process origin of the rare-earth elements  

E-Print Network [OSTI]

Neutron star (NS) merger ejecta offer a viable site for the production of heavy r-process elements with nuclear mass numbers A > 140. The crucial role of fission recycling is responsible for the robustness of this site against many astrophysical uncertainties, but calculations sensitively depend on nuclear physics. In particular the fission fragment yields determine the creation of 110 rare-earth peak that is nicely compatible with the abundance patterns in the Sun and metal-poor stars. This new finding further strengthens the case of NS mergers as possible dominant origin of r-nuclei with A > 140.

S. Goriely; J. -L. Sida; J. -F. Lemaitre; S. Panebianco; N. Dubray; S. Hilaire; A. Bauswein; H. -Thomas Janka

2013-11-22T23:59:59.000Z

275

Extraction of pion non-perturbative fragmentation functions in ZM-VFNS  

SciTech Connect (OSTI)

We present pion non-perturbative fragmentation functions (non-pFFs) at next-to-leading order (NLO) obtained through a global fit to electron-positron annihilation data from CERN LEP1, SLAC SLC, DESY and KEK, using zero-mass variable-flavor-number scheme. We apply the obtained non-pFFs to predict the scaled-energy distribution of {pi}{sup {+-}} inclusively produced in top-quark decays. The results are in good agreement with the available theoretical models.

Soleymaninia, M.; Khorramian, A. N.; Moosavinejad, S. M. [Physics Department, Semnan University, Semnan (Iran, Islamic Republic of) and School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM), P.O.Box 19395-5531, Tehran (Iran, Islamic Republic of); Physics faculty, Yazd University, Yazd, Iran and School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM), P.O.Box 19395-5531, Tehran (Iran, Islamic Republic of)

2012-10-23T23:59:59.000Z

276

Preliminary estimation of the footprint and survivability of the Chelyabinsk Meteor fragments  

E-Print Network [OSTI]

There are several differences between the planetary entry of space vehicles and that of asteroids. In this work we do investigate the applicability of classical methods and approaches developed for debris analysis to asteroid entry. In particular, the in-house DEBRIS tool, which has been designed and developed to address the debris problem for uncontrolled re-entry objects, is used here to predict the survivability and the ground footprint of asteroid fragments. The results obtained for the Chelyabinsk event are presented as test case. A comparison with the current available information is provided, proving the validity of the proposed approach.

Parigini, Cristina; Haya-Ramos, Rodrigo

2013-01-01T23:59:59.000Z

277

First measurement of interference fragmentation on a transversely polarized hydrogen target  

E-Print Network [OSTI]

The HERMES experiment has measured for the first time single target-spin asymmetries in semi-inclusive two-pion production using a transversely polarized hydrogen target. These asymmetries are related to the product of two unknowns, the transversity distribution function and the interference fragmentation function. In the invariant mass range 0.51 GeV < M_inv < 0.97 GeV the measured asymmetry deviates significantly from zero, indicating that two-pion semi-inclusive deep-inelastic scattering can be used to probe transversity.

P. B. van der Nat; for the HERMES collaboration

2005-12-08T23:59:59.000Z

278

Quark cluster contribution to cumulative proton emission in fragmentation of carbon ions  

E-Print Network [OSTI]

In the FRAGM experiment at heavy ion accelerator complex TWAC-ITEP, the proton yields at an angle 3.5$^\\circ$ have been measured at fragmentation of carbon ions at $T_0 = $ 0.6, 0.95 and 2.0 GeV/nucleon on beryllium target. The data are presented as invariant proton yields on cumulative variable $x$ in the range 0.9 carbon nuclei are estimated to be 8--12% for six-quark clusters and 0.2--0.6% for nine-quark clusters.

B. M. Abramov; P. N. Alekseev; Yu. A. Borodin; S. A. Bulychjov; I. A. Dukhovskoy; A. I. Khanov; A. P. Krutenkova; V. V. Kulikov; M. A. Martemyanov; M. A. Matsyuk; E. N. Turdakina

2013-10-23T23:59:59.000Z

279

The effects of Moloney Sarcoma Virus infection and subsequent thymosin administration on the functional thymus-dependent lymphocyte populations of BALB/C and congenitally athymic nude mice  

E-Print Network [OSTI]

. Congenitally athymic nude mice were kindly suppli. ed by Dr Gary B. Thurman, Galveston, Texas. BALB/c and Swiss?Webster mice were maintained on laboratory chow and water ad libitum until use. Virus. The virus used was Moloney Sarcoma Virus, originally...THE EFFECTS OF MOLONEY SARCOMA VIRUS INFECTION AND SUBSEQUENT THYMOSIN ADMINISTRATION ON THE FUNCTIONAL THYMUS-DEPENDENT LYMPHOCYTE POPULATIONS OF BALB/C AND CONGENITALLY ATHYMIC NUDE MICE A Thesis by GAILEN DAUGHERTY MARSHALL, JR. Submitted...

Marshall, Gailen Daughterty

1975-01-01T23:59:59.000Z

280

Effect of clipping at several stages of growth of first year plants of cane Bluesteam (Andropogon barbinodis Lag.) on subsequent development  

E-Print Network [OSTI]

in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1965 Major Subject: Range Management EFFECT OF CLIPPING AT SEVERAL STAGES OF GROWTH OF FIRST YEAR PLANTS OF CANE BLUESTEM (~Ad P S S d I S. ) ON SUBSEQUENT DEVELDPMENT... L. Leinweber. Also, thanks to Mr. Paul Ohlenbusch, graduate student of Range Management, for his help and suggestions during the study. Appreciation is extended to Dr. Eldred E. Dayhoff, staff member of the Institute of Statistics, and Mr...

Bernardon, Abel Eduardo

1965-01-01T23:59:59.000Z

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


281

Inferring Group Processes from Computer-Mediated Affective Text Analysis  

SciTech Connect (OSTI)

Political communications in the form of unstructured text convey rich connotative meaning that can reveal underlying group social processes. Previous research has focused on sentiment analysis at the document level, but we extend this analysis to sub-document levels through a detailed analysis of affective relationships between entities extracted from a document. Instead of pure sentiment analysis, which is just positive or negative, we explore nuances of affective meaning in 22 affect categories. Our affect propagation algorithm automatically calculates and displays extracted affective relationships among entities in graphical form in our prototype (TEAMSTER), starting with seed lists of affect terms. Several useful metrics are defined to infer underlying group processes by aggregating affective relationships discovered in a text. Our approach has been validated with annotated documents from the MPQA corpus, achieving a performance gain of 74% over comparable random guessers.

Schryver, Jack C [ORNL; Begoli, Edmon [ORNL; Jose, Ajith [Missouri University of Science and Technology; Griffin, Christopher [Pennsylvania State University

2011-02-01T23:59:59.000Z

282

Isoscaling of fragments with Z=1-17 from reconstructed quasiprojectiles  

SciTech Connect (OSTI)

In heavy-ion collisions, isoscaling provides a method for studying the evolution of nuclear symmetry energy as a function of excitation energy. One challenge in using isoscaling is to accurately determine the neutron-to-proton ratio (N/Z) of the fragmenting source. Isoscaling results are presented for the reactions of {sup 86,78}Kr+{sup 64,58}Ni at 35 MeV/nucleon taken on the NIMROD-ISiS array at Texas A and M University. The N/Z of the source was calculated from the isotopically identified fragments and experimentally measured neutrons emitted from reconstructed quasiprojectiles. These data exhibit isoscaling for elements with Z=1-17 over a broad range of isotopes. The isoscaling parameter {alpha} is shown to increase with increasing difference in the neutron composition ({delta}) of the compared sources. For a selected {delta}, the ratio {alpha}/{delta} is also shown to decrease with increasing excitation energy. This may reflect a corresponding decrease in the nuclear symmetry energy.

Wuenschel, S.; Kohley, Z.; May, L. W.; Soisson, S. N.; Stein, B. C.; Yennello, S. J. [Chemistry Department, Texas A and M University, College Station, Texas 77843 (United States); Cyclotron Institute, Texas A and M University, College Station, Texas 77843 (United States); Dienhoffer, R. [Cyclotron Institute, Texas A and M University, College Station, Texas 77843 (United States); Department of Physics, State University of New York at Oswego, New York 13126 (United States); Souliotis, G. A.; Galanopoulos, S.; Hagel, K.; Shetty, D. V.; Huseman, K. [Cyclotron Institute, Texas A and M University, College Station, Texas 77843 (United States); Caraley, A. L. [Department of Physics, State University of New York at Oswego, New York 13126 (United States)

2009-06-15T23:59:59.000Z

283

PARTICLE ACCELERATION IN FRAGMENTING PERIODIC RECONNECTING CURRENT SHEETS IN SOLAR FLARES  

SciTech Connect (OSTI)

Proton and electron acceleration in a fragmenting periodic current sheet (CS) is investigated, based on the forced magnetic reconnection scenario. The aim is to understand the role of CS fragmentation in high-energy beam generation in solar flares. We combine magnetohydrodynamics and test-particle models to consider particle trajectories consistent with a time-dependent reconnection model. It is shown that accelerated particles in such a model form two distinct populations. Protons and electrons moving in open magnetic field have energy spectra that are a combination of the initial Maxwellian distribution and a power-law high-energy (E>20 keV) part. The second population contains particles moving in a closed magnetic field around O-points. These particles move predominantly along the guiding field and their energies fall within quite a narrow range between {approx}1 MeV and {approx}10 MeV. It is also found that particles moving in an open magnetic field have a considerably wider pitch-angle distribution.

Gordovskyy, M.; Browning, P. K.; Vekstein, G. E., E-mail: mykola.gordovskyy@manchester.ac.u [Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom)

2010-09-10T23:59:59.000Z

284

Design of large aperture superferric quadrupole magnets for an in-flight fragment separator  

SciTech Connect (OSTI)

Superferric quadrupole magnets to be used for in-flight fragment separator have been designed. A quadrupole magnet triplet for beam focusing is placed in a cryostat together with superconducting correction coils. To maximize acceptance of rare isotope beams produced by projectile fragmentation, it is essential to use large-aperture quadrupole magnets. The pole tip radius is 17 cm in the current design, and we tried to enlarge the aperture with 3D analysis on magnetic fields. In the front end of the separator, where a target and beam dump are located, we plan to use two sets of quadrupole triplets made of high-Tc superconductor (HTS) operating at 20-50 K considering high radiation heat load. The HTS magnet will use warm iron poles. Both low-Tc and high-Tc superconductors are acquired for test winding, and two kinds of dewar and cryostat are under construction to perform the coil and magnet tests. The magnetic design of superferric quadrupole is mainly discussed.

Zaghloul, Aziz; Kim, Dogyun; Kim, Jangyoul; Kim, Mijung; Kim, Myeongjin; Yun, Chongcheoul; Kim, Jongwon [Rare Isotope Science Project, Institute for Basic Science, Yuseong, Daejeon, 305-811 (Korea, Republic of)

2014-01-29T23:59:59.000Z

285

Zero degree measurements of 12C fragmentation at 95 MeV/nucleon on thin targets  

E-Print Network [OSTI]

During therapeutic treatments using ions such as carbon, nuclear interactions between the incident ions and nuclei present in organic tissues may occur, leading to the attenuation of the incident beam intensity and to the production of secondary light charged particles. As the biological dose deposited in the tumor and the surrounding healthy tissues depends on the beam composition, an accurate knowledge of the fragmentation processes is thus essential. In particular, the nuclear interaction models have to be validated using experimental double differential cross sections which are still very scarce. An experiment was realized in 2011 at GANIL to obtain these cross sections for a 95 MeV/nucleon carbon beam on different thin targets for angles raging from 4 to 43{\\deg} . In order to complete these data, a new experiment was performed on September 2013 at GANIL to measure the fragmentation cross section at zero degree for a 95 MeV/nucleon carbon beam on thin targets. In this work, the experimental setup will be described, the analysis method detailed and the results presented.

J. Dudouet; M. Labalme; D. Cussol; C. Finck; R. Rescigno; M. Rousseau; S. Salvador; M. Vanstalle

2014-07-01T23:59:59.000Z

286

Fragment Approach to Constrained Density Functional Theory Calculations using Daubechies Wavelets  

E-Print Network [OSTI]

In a recent paper we presented a linear scaling Kohn-Sham density functional theory (DFT) code based on Daubechies wavelets, where a minimal set of localized support functions is optimized in situ and therefore adapted to the chemical properties of the molecular system. Thanks to the systematically controllable accuracy of the underlying basis set, this approach is able to provide an optimal contracted basis for a given system: accuracies for ground state energies and atomic forces are of the same quality as an uncontracted, cubic scaling approach. This basis set offers, by construction, a natural subset where the density matrix of the system can be projected. In this paper we demonstrate the flexibility of this minimal basis formalism in providing a basis set that can be reused as-is, i.e. without reoptimization, for charge-constrained DFT calculations within a fragment approach. Support functions, represented in the underlying wavelet grid, of the template fragments are roto-translated with high numerical p...

Ratcliff, Laura E; Mohr, Stephan; Deutsch, Thierry

2015-01-01T23:59:59.000Z

287

Linearly Scaling 3D Fragment Method for Large-Scale Electronic Structure Calculations  

SciTech Connect (OSTI)

We present a new linearly scaling three-dimensional fragment (LS3DF) method for large scale ab initio electronic structure calculations. LS3DF is based on a divide-and-conquer approach, which incorporates a novel patching scheme that effectively cancels out the artificial boundary effects due to the subdivision of the system. As a consequence, the LS3DF program yields essentially the same results as direct density functional theory (DFT) calculations. The fragments of the LS3DF algorithm can be calculated separately with different groups of processors. This leads to almost perfect parallelization on tens of thousands of processors. After code optimization, we were able to achieve 35.1 Tflop/s, which is 39percent of the theoretical speed on 17,280 Cray XT4 processor cores. Our 13,824-atom ZnTeO alloy calculation runs 400 times faster than a direct DFTcalculation, even presuming that the direct DFT calculation can scale well up to 17,280 processor cores. These results demonstrate the applicability of the LS3DF method to material simulations, the advantage of using linearly scaling algorithms over conventional O(N3) methods, and the potential for petascale computation using the LS3DF method.

Wang, Lin-Wang; Lee, Byounghak; Shan, Hongzhang; Zhao, Zhengji; Meza, Juan; Strohmaier, Erich; Bailey, David H.

2008-07-01T23:59:59.000Z

288

Half-life measurements of isomeric states populated in projectile fragmentation  

SciTech Connect (OSTI)

The half-lives of excited isomeric states observed in {sup 195}Au, {sup 201}Tl and {sup 215}Rn are reported for the first time. Delayed {gamma}-rays were correlated with nuclei produced in the projectile fragmentation of relativistic {sup 238}U ions, unambiguously identified in terms of their atomic number (Z) and mass-to-charge ratio (A/Q) after traversing an in-flight separator. The observation of a long-lived isomeric state in {sup 195}Au with t{sub 1/2} = 16{sub -4}{sup +8}{mu}s is presented. Two shorter-lived isomeric states were detected in {sup 201}Tl and {sup 215}Rn with t{sub 1/2} = 95{sub -21}{sup +39} and 57{sub -12}{sup +21} ns respectively. In total 24 isomeric states were identified in different nuclei from Pt to Rn (A {approx} 200) during the current study, the majority of which were previously reported. The wealth of spectroscopic data provides the opportunity to determine the isomeric ratios over a wide range of Z, A and angular momentum (I h) of the reaction products. In particular, high-spin states with I Greater-Than-Or-Equivalent-To 18 h provide a robust test of theoretical models of fragmentation.

Bowry, M.; Podolay, Zs. [Department of Physics, University of Surrey, Guildford, GU2 7XH (United Kingdom)

2012-10-20T23:59:59.000Z

289

Forward-backward emission of target evaporated evaporated fragments at high energy nucleus-nucleus collisions  

E-Print Network [OSTI]

The multiplicity distribution, multiplicity moment, scaled variance, entropy and reduced entropy of target evaporated fragment emitted in forward and backward hemispheres in 12 A GeV $^{4}$He, 3.7 A GeV $^{16}$O, 60 A GeV $^{16}$O, 1.7 A GeV $^{84}$Kr and 10.7 A GeV $^{197}$Au induced emulsion heavy targets (AgBr) interactions are investigated. It is found that the multiplicity distribution of target evaporated fragments emitted in forward and backward hemispheres can be fitted by a Gaussian distribution. The multiplicity moments of target evaporated particles emitted in forward and backward hemispheres increase with the order of the moment {\\em q}, and second-order multiplicity moment is energy independent over the entire energy for all the interactions in the forward and backward hemisphere respectively. The scaled variance, a direct measure of multiplicity fluctuations, is close to one for all the interactions which may be said that there is a feeble correlation among the produced particles. The entropy of...

Zhang, Zhi; Zhang, Dong-Hai

2015-01-01T23:59:59.000Z

290

Stability of the fragments and thermalization at peak center-of-mass energy  

E-Print Network [OSTI]

We simulate the central reactions of nearly symmetric, and asymmetric systems, for the energies at which the maximum production of IMFs occurs (E$_{c.m.}^{peak}$).This study is carried out by using hard EOS along with cugnon cross section and employing MSTB method for clusterization. We study the various properties of fragments. The stability of fragments is checked through persistence coefficient and gain term. The information about the thermalization and stopping in heavy-ion collisions is obtained via relative momentum, anisotropy ratio, and rapidity distribution. We find that for a complete stopping of incoming nuclei very heavy systems are required. The mass dependence of various quantities (such as average and maximum central density, collision dynamics as well as the time zone for hot and dense nuclear matter) is also presented. In all cases (i.e., average and maximum central density, collision dynamics as well as the time zone for hot and dense nuclear matter) a power law dependence is obtained.

Aman D. Sood; Sukhjit Kaur

2011-06-14T23:59:59.000Z

291

General-purpose heat source: Research and development program, radioisotope thermoelectric generator/thin fragment impact test  

SciTech Connect (OSTI)

The general-purpose heat source provides power for space missions by transmitting the heat of {sup 238}Pu decay to an array of thermoelectric elements in a radioisotope thermoelectric generator (RTG). Because the potential for a launch abort or return from orbit exists for any space mission, the heat source response to credible accident scenarios is being evaluated. This test was designed to provide information on the response of a loaded RTG to impact by a fragment similar to the type of fragment produced by breakup of the spacecraft propulsion module system. The results of this test indicated that impact by a thin aluminum fragment traveling at 306 m/s may result in significant damage to the converter housing, failure of one fueled clad, and release of a small quantity of fuel.

Reimus, M.A.H.; Hinckley, J.E.

1996-11-01T23:59:59.000Z

292

assisted conception affect: Topics by E-print Network  

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

of - Research Archive Summary: Objectives: Previous literature suggests that dyslexia affects self-esteem and self-concept in school children (Humphrey & Mullins, 2004)....

293

affected children independent: Topics by E-print Network  

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

Espaces et Socits Boyer, Edmond 3 Utility & Regulatory Factors Affecting Cogeneration & Independent Power Plant Design & Operation Texas A&M University - TxSpace...

294

affects diverse aspects: Topics by E-print Network  

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

of the phytochrome-signaling path- ways Tobin, Elaine 242 Societal demand for increasing mineral resources continue to affect societythrough aspects as varied as Biology and...

295

adversely affect neurological: Topics by E-print Network  

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

of microtubules, as is whether paclitaxel is released Walter, Nils G. 77 Does the knowledge of unaudited account balances adversely affect the performance of substantive...

296

affecting proton exchange: Topics by E-print Network  

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

stress applied to the electrode area of a Proton Exchange Membrane (PEM) fuel cell is known to significantly affect power output. In practice, electrode stress arises...

297

affect receptor clustering: Topics by E-print Network  

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

behavior between near-neighbor receptor molecules; the properties of this cooperative process clearly affects the signal transduction. Recent investigations have revealed the...

298

affecting body size: Topics by E-print Network  

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

Body size and reserve protection affect flight initiation Environmental Sciences and Ecology Websites Summary: , is an important component of antipredator behavior and a...

299

affecting chemical indices: Topics by E-print Network  

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

Media, LLC (outside the USA) 2012 Abstract Root herbivores can affect plant fitness, and roots often of root chemical defense have been little investigated. Here, we investigated...

300

Global climate change will affect air, water in California  

E-Print Network [OSTI]

Department of Land, Air and Water Resources, UC Davis. Hechange will affect air, water in California Bryan C. Wearelikely to include reduced water availability and quality,

Weare, Bryan C.

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

affect postimplant perceptions: Topics by E-print Network  

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

Boston College; Paula M. Niedenthal, National Center Barrett, Lisa Feldman 14 Climate change risk perception and policy preferences: the role of affect, imagery, and values...

302

affects lysosomal distribution: Topics by E-print Network  

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

Key factors affecting voltage oscillations of distribution networks with distributed generation and induction motor loads Engineering Websites Summary: and induction motor loads...

303

affects neutrophil apoptosis: Topics by E-print Network  

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

Trap Formation Is Associated with IL-1b and Autophagy-Related Signaling in Gout CiteSeer Summary: Background: Gout is a prevalent inflammatory arthritis affecting 12...

304

affect gonadal fate: Topics by E-print Network  

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

24 25 Next Page Last Page Topic Index 1 Predicting the fate of a living fossil: how will global warming affect sex determination Multidisciplinary Databases and Resources Websites...

305

affects social development: Topics by E-print Network  

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

Open Access Theses and Dissertations Summary: ??Sport for Development (SFD) uses the power of sport to support international development initiatives that affect social change...

306

affecting carcass quality: Topics by E-print Network  

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

Weight gain or loss Disturbed sleep Kalueff, Allan V. 416 AS AFFECTED BY ROTATION CROP, CULTIVATION, CiteSeer Summary: Reduction of dependence on herbicides in potato...

307

affecting sperm quality: Topics by E-print Network  

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

Weight gain or loss Disturbed sleep Kalueff, Allan V. 488 AS AFFECTED BY ROTATION CROP, CULTIVATION, CiteSeer Summary: Reduction of dependence on herbicides in potato...

308

affect postoperative quality: Topics by E-print Network  

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

Weight gain or loss Disturbed sleep Kalueff, Allan V. 308 AS AFFECTED BY ROTATION CROP, CULTIVATION, CiteSeer Summary: Reduction of dependence on herbicides in potato...

309

Efficient Molecular Dynamics Simulations of Multiple Radical Center Systems Based on the Fragment Molecular Orbital Method  

SciTech Connect (OSTI)

The fully analytic energy gradient has been developed and implemented for the restricted open-shell Hartree–Fock (ROHF) method based on the fragment molecular orbital (FMO) theory for systems that have multiple open-shell molecules. The accuracy of the analytic ROHF energy gradient is compared with the corresponding numerical gradient, illustrating the accuracy of the analytic gradient. The ROHF analytic gradient is used to perform molecular dynamics simulations of an unusual open-shell system, liquid oxygen, and mixtures of oxygen and nitrogen. These molecular dynamics simulations provide some insight about how triplet oxygen molecules interact with each other. Timings reveal that the method can calculate the energy gradient for a system containing 4000 atoms in only 6 h. Therefore, it is concluded that the FMO-ROHF method will be useful for investigating systems with multiple open shells.

Nakata, Hiroya [Tokyo Institute of Technology; Schmidt, Michael W [Ames Laboratory; Fedorov, Dmitri G [National Institute of Advanced Industrial Science and Technology (AIST); Kitaura, Kazuo [Kobe University; Nakamura, Shinichiro [Nakamura Lab; Gordon, Mark S [Ames Laboratory

2014-10-16T23:59:59.000Z

310

Three-dimensional simulations of molecular cloud fragmentation regulated by magnetic fields and ambipolar diffusion  

E-Print Network [OSTI]

We employ the first fully three-dimensional simulation to study the role of magnetic fields and ion-neutral friction in regulating gravitationally-driven fragmentation of molecular clouds. The cores in an initially subcritical cloud develop gradually over an ambipolar diffusion time while the cores in an initially supercritical cloud develop in a dynamical time. The infall speeds on to cores are subsonic in the case of an initially subcritical cloud, while an extended (\\ga 0.1 pc) region of supersonic infall exists in the case of an initially supercritical cloud. These results are consistent with previous two-dimensional simulations. We also found that a snapshot of the relation between density (rho) and the strength of the magnetic field (B) at different spatial points of the cloud coincides with the evolutionary track of an individual core. When the density becomes large, both relations tend to B \\propto \\rho^{0.5}.

Takahiro Kudoh; Shantanu Basu; Youichi Ogata; Takashi Yabe

2007-06-19T23:59:59.000Z

311

Study of near-stability nuclei populated as fission fragments in heavy-ion fusion reactions  

SciTech Connect (OSTI)

Examples are presented to illustrate the power of prompt {gamma}-ray spectroscopy of fission fragments from compound nuclei with A{approx}200 formed in fusion-evaporation reactions in experiments using the Gammasphere Ge-detector array. Complementary methods, such as Coulomb excitation and deep-inelastic processes, are also discussed. In other cases (n,xn{gamma}) reactions on stable isotopes have been used to establish neutron excitation functions for {gamma}-rays using a pulsed 'white'-neutron source, coupled to a high-energy-resolution germanium-detector array. The excitation functions can unambiguously assign {gamma}-rays to a specific reaction product. Results from all these methods bridge the gaps in the systematics of high-spin states between the neutron-deficient and neutron-rich nuclei. Results near shell closures should motivate new shell model calculations.

Fotiades, N.; Nelson, R. O.; Devlin, M. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Cizewski, J. A. [Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903 (United States); Kruecken, R. [Physik Department E12, Technische Universitaet Muenchen, D-85748 Garching (Germany); Clark, R. M.; Fallon, P.; Lee, I. Y.; Macchiavelli, A. O. [Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Becker, J. A.; Younes, W. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

2011-10-28T23:59:59.000Z

312

Study of near-stability nuclei populated as fission fragments in heavy-ion fusion reactions  

SciTech Connect (OSTI)

Examples are presented to illustrate the power of prompt {gamma}-ray spectroscopy of fission fragments from compound nuclei with A {approx} 200 formed in fusion-evaporation reactions in experiments using the Gammasphere Ge-detector array. Complementary methods, such as Coulomb excitation and deep-inelastic processes, are also discussed. In other cases (n, xn{gamma}) reactions on stable isotopes have been used to establish neutron excitation functions for {gamma}-rays using a pulsed 'white'-neutron source, coupled to a high-energy-resolution germanium-detector array. The excitation functions can unambiguously assign {gamma}-rays to a specific reaction product. Results from all these methods bridge the gaps in the systematics of high-spin states between the neutron-deficient and neutron-rich nuclei. Results near shell closures should motivate new shell model calculations.

Fotiadis, Nikolaos [Los Alamos National Laboratory; Nelson, Ronald O [Los Alamos National Laboratory; Devlin, Matthew [Los Alamos National Laboratory; Cizewski, Jolie A [RUTGERS UNIV.; Krucken, Reiner [TECHNICAL UNIV OF MUNICH; Clark, R M [LBNL; Fallon, Paul [LBNL; Lee, I Yang [LBNL; Macchiavelli, Agusto O [LBNL; Becker, John A [LLNL; Younes, Walid [LLNL

2010-01-01T23:59:59.000Z

313

Fission Fragments Produced from Proton Irradiation of Thorium Between 40 and 200 MeV  

E-Print Network [OSTI]

The cross sections for the formation of five residual radionuclides (72Se, 97Zr, 112Pd, 125Sb, and 147Nb) from 40- to 200-MeV proton irradiation of thorium have been measured and are reported. The atomic masses of these fragments span the expected mass distribution of radionuclides formed by fission of the target nucleus. Especially in mass regions corresponding to transitions between different relaxation mechanisms employed by available models, these data are expected to be useful to the improvement of high-energy transport codes. The predictions of the event generators incorporated into the latest release of the Monte Carlo N-Particle code (MCNP6) are compared with data measured in this work in the hope that these results may be useful to the continued process of code verification and validation in MCNP6.

Jonathan W. Engle; Stepan G. Mashnik; John W. Weidner; Michael E. Fassbender; Hong T. Bach; John L. Ullmann; Aaron J. Couture; Leo J. Bitteker; Mark S. Gulley; Kevin D. John; Eva R. Birnbaum; Francois M. Nortier

2013-11-19T23:59:59.000Z

314

Fission Fragments Produced from Proton Irradiation of Thorium Between 40 and 200 MeV  

E-Print Network [OSTI]

The cross sections for the formation of five residual radionuclides (72Se, 97Zr, 112Pd, 125Sb, and 147Nb) from 40- to 200-MeV proton irradiation of thorium have been measured and are reported. The atomic masses of these fragments span the expected mass distribution of radionuclides formed by fission of the target nucleus. Especially in mass regions corresponding to transitions between different relaxation mechanisms employed by available models, these data are expected to be useful to the improvement of high-energy transport codes. The predictions of the event generators incorporated into the latest release of the Monte Carlo N-Particle code (MCNP6) are compared with data measured in this work in the hope that these results may be useful to the continued process of code verification and validation in MCNP6.

Engle, Jonathan W; Weidner, John W; Fassbender, Michael E; Bach, Hong T; Ullmann, John L; Couture, Aaron J; Bitteker, Leo J; Gulley, Mark S; John, Kevin D; Birnbaum, Eva R; Nortier, Francois M

2013-01-01T23:59:59.000Z

315

Macroscopic observables experimentally linked to microscopic processes in the explosive fracture and fragmentation of metals  

SciTech Connect (OSTI)

The response of a metal element to explosive loading depends on a broad spectrum of explosive and metal properties, macroscopic geometry plays a crucial role in defining the localized loading history and the resulting gradients of interest, while microscopic effects and defects are generally believed responsible for damage nucleation. Certain experiments reduce the complexity by producing conditions that are uniform in some sense, allowing dynamic measurement of variables that can be correlated with corresponding microscopic effects observed in recovery experiments. Spherical expansion of thin shells, that eventually fragment, and steady wave loading of flat plates are two such experiments. Proton radiography, x-radiography, laser velocimetry, imaging IR, and visible light photography all have produced dynamic measurements in 4340 steel, copper, uranium alloys, tantalum, and titanium. Correlation of the macroscopic measurements with microscopy on recovered samples has been done with a statistical approach.

Hull, Lawrence M [Los Alamos National Laboratory

2010-12-16T23:59:59.000Z

316

Spontaneous current-layer fragmentation and cascading reconnection in solar flares: I. Model and analysis  

E-Print Network [OSTI]

Magnetic reconnection is commonly considered as a mechanism of solar (eruptive) flares. A deeper study of this scenario reveals, however, a number of open issues. Among them is the fundamental question, how the magnetic energy is transferred from large, accumulation scales to plasma scales where its actual dissipation takes place. In order to investigate this transfer over a broad range of scales we address this question by means of high-resolution MHD simulation. The simulation results indicate, that the magnetic-energy transfer to small scales is realized via a cascade of consecutive smaller and smaller flux-ropes (plasmoids), in analogy with the vortex-tube cascade in (incompressible) fluid dynamics. Both tearing and (driven) coalescence processes are equally important for the consecutive fragmentation of the magnetic field (and associated current density) to smaller elements. At the later stages a dynamic balance between tearing and coalescence processes reveals a steady (power-law) scaling typical for ca...

Bárta, Miroslav; Karlický, Marian; Skála, Jan

2010-01-01T23:59:59.000Z

317

Unpolarised Transverse Momentum Dependent Distribution and Fragmentation Functions from SIDIS Multiplicities  

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

The unpolarised transverse momentum dependent distribution and fragmentation functions are extracted from HERMES and COMPASS experimental measurements of SIDIS multiplicities for charged hadron production. The data are grouped into independent bins of the kinematical variables, in which the TMD factorisation is expected to hold. A simple factorised functional form of the TMDs is adopted, with a Gaussian dependence on the intrinsic transverse momentum, which turns out to be quite adequate in shape. HERMES data do not need any normalisation correction, while fits of the COMPASS data much improve with a y-dependent overall normalisation factor. A comparison of the extracted TMDs with previous EMC and JLab data confirms the adequacy of the simple gaussian distributions. The possible role of the TMD evolution is briefly considered.

Prokudin, Alexey [JLAB; Anselmino, Mauro; Boglione, Mariaelena; Melis, Stefano; Gonzalez, J. O.

2014-04-01T23:59:59.000Z

318

Fragmentation cross sections of Fe^{26+}, Si^{14+} and C^{6+} ions of 0.3-10 A GeV on polyethylene, CR39 and aluminum targets  

E-Print Network [OSTI]

We present new measurements of the total and partial fragmentation cross sections in the energy range 0.3-10 A GeV of 56Fe, 28Si and 12C beams on polyethylene, CR39 and aluminum targets. The exposures were made at BNL, USA and HIMAC, Japan. The CR39 nuclear track detectors were used to identify the incident and survived beams and their fragments. The total fragmentation cross sections for all targets are almost energy independent while they depend on the target mass. The measured partial fragmentation cross sections are also discussed.

Cecchini, S; Giacomelli, G; Giorgini, M; Kumar, A; Mandrioli, G; Manzoor, S; Margiotta, A R; Medinaceli, E; Patrizii, L; Popa, V; Qureshi, I E; Sirri, G; Spurio, M; Togo, V

2008-01-01T23:59:59.000Z

319

Fragmentation cross sections of Fe^{26+}, Si^{14+} and C^{6+} ions of 0.3-10 A GeV on CR39, polyethylene and aluminum targets  

E-Print Network [OSTI]

New measurements of the total and partial fragmentation cross sections in the energy range 0.3-10 A GeV of Fe^{26+}, Si^{14+} and C^{6+} beams on polyethylene, CR39 and aluminum targets are presented. The exposures were made at Brookhaven National Laboratory (BNL), USA, and Heavy Ion Medical Accelerator in Chiba (HIMAC), Japan. The CR39 nuclear track detectors were used to identify the incident and survived beams and their fragments. The total fragmentation cross sections for all targets are almost energy independent while they depend on the target mass. The measured partial fragmentation cross sections are also discussed.

Miriam Giorgini

2008-12-01T23:59:59.000Z

320

Fragmentation cross sections of Fe^{26+}, Si^{14+} and C^{6+} ions of 0.3-10 A GeV on polyethylene, CR39 and aluminum targets  

E-Print Network [OSTI]

We present new measurements of the total and partial fragmentation cross sections in the energy range 0.3-10 A GeV of 56Fe, 28Si and 12C beams on polyethylene, CR39 and aluminum targets. The exposures were made at BNL, USA and HIMAC, Japan. The CR39 nuclear track detectors were used to identify the incident and survived beams and their fragments. The total fragmentation cross sections for all targets are almost energy independent while they depend on the target mass. The measured partial fragmentation cross sections are also discussed.

S. Cecchini; T. Chiarusi; G. Giacomelli; M. Giorgini; A. Kumar; G. Mandrioli; S. Manzoor; A. R. Margiotta; E. Medinaceli; L. Patrizii; V. Popa; I. E. Qureshi; G. Sirri; M. Spurio; V. Togo

2008-01-21T23:59:59.000Z

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

Fragmentation cross sections of Fe^{26+}, Si^{14+} and C^{6+} ions of 0.3-10 A GeV on CR39, polyethylene and aluminum targets  

E-Print Network [OSTI]

New measurements of the total and partial fragmentation cross sections in the energy range 0.3-10 A GeV of Fe^{26+}, Si^{14+} and C^{6+} beams on polyethylene, CR39 and aluminum targets are presented. The exposures were made at Brookhaven National Laboratory (BNL), USA, and Heavy Ion Medical Accelerator in Chiba (HIMAC), Japan. The CR39 nuclear track detectors were used to identify the incident and survived beams and their fragments. The total fragmentation cross sections for all targets are almost energy independent while they depend on the target mass. The measured partial fragmentation cross sections are also discussed.

Giorgini, Miriam

2008-01-01T23:59:59.000Z

322

CAB International 2007. Biodiversity Loss and Conservation in Fragmented Forest Landscapes: 370 The Forests of Montane Mexico and Temperate South America (ed. A.C. Newton)  

E-Print Network [OSTI]

, mining, development of infrastructure (roads, pipelines, dams), logging/fuelwood extraction, habitat fragmentation, climate change and loss of keystone species and ecological structures. The relative importance

Rey Benayas, José María

323

New Mass and Lifetime Measurements of $^{152}$Sm Projectile Fragments with Time-Resolved Schottky Mass Spectrometry  

E-Print Network [OSTI]

The FRS-ESR facilities at GSI provide unique conditions for precision measurements with stored exotic nuclei over a large range in the chart of nuclides. In the present experiment the exotic nuclei were produced via fragmentation of $^{152}$Sm projectiles in a thick beryllium target at 500-600 MeV/u, separated in-flight with the fragment separator FRS, and injected into the storage-cooler ring ESR. Mass and lifetime measurements have been performed with bare and few-electron ions. The experiment and first results will be presented in this contribution.

Yu. A. Litvinov; F. Bosch; H. Geissel; H. Weick; K. Beckert; P. Beller; D. Boutin; C. Brandau; L. Chen; O. Klepper; R. Knöbel; C. Kozhuharov; J. Kurcewicz; S. A. Litvinov; M. Mazzocco; G. Münzenberg; C. Nociforo; F. Nolden; W. Plaß; C. Scheidenberger; M. Steck; B. Sun; M. Winkler

2005-09-15T23:59:59.000Z

324

Measurement of the Relative Fragmentation Fractions of B-bar Hadrons  

SciTech Connect (OSTI)

This thesis describes the first Run II measurement of b quark fragmentation into {bar B}{sup 0}, B{sup -}, and {bar B}{sub s}{sup 0} mesons and {Lambda}{sub b}{sup 0} baryons using semileptonic B decays. The result is based on 360 pb{sup -1} of data collected with the CDF detector in p{bar p} collisions at {radical}s = 1,960 GeV at the Tevatron Collider at Fermilab. The fragmentation fractions are measured for an effective {bar B} hadron p{sub T} threshold of 7 GeV/c to be f{sub u}/f{sub d} = 1.054 {+-} 0.018(stat){sub -0.045}{sup +0.025}(syst) {+-} 0.058(BR), f{sub s}/(f{sub u} + f{sub d}) = 0.160 {+-} 0.005(stat){sub -0.010}{sup +0.011}(syst){sub -0.034}{sup +0.057}(BR), and f{sub {Lambda}{sub b}}/(f{sub u} + f{sub d}) = 0.281 {+-} 0.012(stat){sub -0.056}{sup +0.058}(syst){sub -0.086}{sup +0.128}(BR). f{sub s}/(f{sub u} + f{sub d}) agrees both with previous CDF measurements and the world averages, dominated by the LEP measurements, with {approx} 1{sigma}. However, f{sub {Lambda}{sub b}}/(f{sub u} + f{sub d}) is approximately twice the value which has been measured at LEP and in CDF Run I and disagrees with the LEP results by approximately 2 {sigma}.

Gibson, Karen Ruth

2006-06-01T23:59:59.000Z

325

Fragmentation of Magnetically Subcritical Clouds into Multiple Supercritical Cores and the Formation of Small Stellar Groups  

E-Print Network [OSTI]

Isolated low-mass stars are formed in dense cores of molecular clouds. In the standard picture, the cores are envisioned to condense out of strongly magnetized clouds through ambipolar diffusion. Most previous calculations based on this scenario are limited to axisymmetric cloud evolution leading to a single core, which collapses to form an isolated star or stellar system at the center. These calculations are here extended to the nonaxisymmetric case under thin-disk approximation, which allows for a detailed investigation into the process of fragmentation, fundamental to binary, multiple system, and cluster formation. We have shown previously that initially axisymmetric, magnetically subcritical clouds with an $m=2$ density perturbation of modest fractional amplitude ($\\sim 5%$) can develop highly elongated bars, which facilitate binary and multiple system formation. In this paper, we show that in the presence of higher order ($m\\ge 3$) perturbations of similar amplitude such clouds are capable of breaking up into a set of discrete dense cores. These multiple cores are magnetically supercritical. They are expected to collapse into single stars or stellar systems individually and, collectively, to form a small stellar group. Our calculations demonstrate that the standard scenario for single star formation involving magnetically subcritical clouds and ambipolar diffusion can readily produce more than one star, provided that the cloud mass is well above the Jeans limit and relatively uniformly distributed. The fragments develop in the central part of the cloud, after the region has become magnetically supercritical but before rapid collapse sets in. It is enhanced by the flattening of mass distribution along the field lines and by the magnetic tension force.

Zhi-Yun Li; Fumitaka Nakamura

2002-06-20T23:59:59.000Z

326

HEART SMART NUTRITION What Affects Your Cholesterol Levels?  

E-Print Network [OSTI]

Lesson 2 HEART SMART NUTRITION What Affects Your Cholesterol Levels? Several things affect cholesterol level, thus reducing your risk of heart disease. Weight ~ Being overweight tends to increase your cholesterol and is a risk factor for heart disease. Lose weight to help lower low density lipoproteins

327

Mental Training Affects Distribution of Limited Brain Resources  

E-Print Network [OSTI]

Mental Training Affects Distribution of Limited Brain Resources Heleen A. Slagter1 , Antoine Lutz1 is believed to result from competition between the two targets for limited attentional resources. Here we show, or mental training, affects the distribution of limited brain resources. Three months of intensive mental

Nieuwenhuis, Sander

328

Development of Fragmented Low-Z Ion Beams for the NA61 Experiment at the CERN SPS  

E-Print Network [OSTI]

The NA61 experiment, aims to study the properties of the onset of deconfinement at low SPS energies and to find signatures of the critical point of strongly interacting matter. A broad range in T-?B phase diagram will be covered by performing an energy (13A-158AGeV/c) and system size (p+p, Be+Be, Ar+Ca, Xe+La) scan. In a first phase, fragmented ion beams of 7Be or 11C produced as secondaries with the same momentum per nucleon when the incident primary Pb-ion beam hits a thin Be target will be used. The H2 beam line that transports the beam to the experiment acts as a double spectrometer which combined with a new thin target (degrader) where fragments loose energy proportional to the square of their charge allows the separation of the wanted A/Z fragments. Thin scintillators and TOF measurement for the low energy points are used as particle identification devices. In this paper results from the first test of the fragmented ion beam done in 2010 will be presented showing that a pure Be beam can be obtained sa...

Efthymiopoulos, I; Bohl, T; Breuker, H; Calviani, M; Manglunki, D; Mataguez, S; Maury, S; Valderanis, C; Cornelis, K; Spanggaard, J; Cettour-Cave, S; Gazdzicki, M; Seyboth, P; Guber, F; Ivashkin, A

2011-01-01T23:59:59.000Z

329

Unpolarised TMD Distribution and Fragmentation Functions from recent HERMES and COMPASS Semi-inclusive Deep Inelastic Scattering Multiplicities  

SciTech Connect (OSTI)

The unpolarised transverse momentum dependent distribution and fragmentation functions (TMDs) are extracted from HERMES and COMPASS experimental measurements of semi- inclusive deep inelastic scattering multiplicities for charged hadron production. A simple factorised functional form of the TMDs is adopted, with a Gaussian dependence on the intrinsic transverse momentum, which turns out to be quite adequate in shape.

Prokudin, Alexey; Anselmino, Mauro; Boglione, Mariaelena; Melis, Stefano; Gonzalez, J. O.

2014-10-01T23:59:59.000Z

330

288 December 2012 Ecological REstoRation 30:4 Bailey, S. 2007 Increasing connectivity in fragmented landscapes  

E-Print Network [OSTI]

of Fragmented Populations. conservation Biology 8:50­59. Florida Natural Areas Inventory. 2010. guide to natural the establishment of protected areas and some small functional corridors between them in high priority areas and Management 238:7­23. Bradley, K. A. 2005. Delineation and organization of natural forest communities of Miami

Vermont, University of

331

PHYSICAL REVIEW C 81, 014607 (2010) Fission fragment mass and energy distributions as a function of incident neutron energy measured  

E-Print Network [OSTI]

, and Nuclear Engineering, NES 1-25, 110 8th Street, Troy, New York 12180, USA 2 Los Alamos National Lab, Los; published 19 January 2010) A new method of measuring fission fragment mass and energy distributions as a function of incident neutron energy are necessary for accurate, detailed neutronics calculations for new

Danon, Yaron

332

Determining the effect of seawater on the interfacial shear strength of fiber reinforced epoxies using the single fiber fragmentation test  

E-Print Network [OSTI]

of fiber reinforced polymer composite materials. The single fiber fragmentation test (SFFT) and Kelly-Tyson shear lag analysis were used to evaluate the effect of seawater on the interfacial shear strength (IFSS) of carbon/epoxy and glass/epoxy composite...

Pratt, Barbara Ann

1996-01-01T23:59:59.000Z

333

Reshaping the contours of Northern Irish drama: Didactic Fragmentation in Owen McCafferty's Scenes from the Big Picture  

E-Print Network [OSTI]

1 Reshaping the contours of Northern Irish drama: Didactic Fragmentation in Owen Mc and pieces of a whole picture. But more than being epic, it is didactic. The audience is called to learn a dialectical dimension that enables it to become didactic. Yet, this didactic dimension could not be completely

Paris-Sud XI, Université de

334

Predicting the Velocity and Azimuth of Fragments Generated by the Range Destruction or Random Failure of Rocket Casings and Tankage  

SciTech Connect (OSTI)

The details of a predictive analytical modeling process as well as the development of normalized relations for momentum partition as a function of SRM burn time and initial geometry are discussed in this paper. Methods for applying similar modeling techniques to liquid-tankage-over-pressure failures are also discussed. These methods have been calibrated against observed SRM ascent failures and on-orbit tankage failures. Casing-quadrant sized fragments with velocities exceeding 100 m/s resulted from Titan 34D-SRM range destruct actions at 10 sec mission elapsed time (MET). Casing-quadrant sized fragments with velocities of approximately 200 m/s resulted from STS-SRM range destruct actions at 110 sec MET. Similar sized fragments for Ariane third stage and Delta second stage tankage were predicted to have maximum velocities of 260 m/s and 480 m/s respectively. Good agreement was found between the predictions and observations for five specific events and it was concluded that the methods developed have good potential for use in predicting the fragmentation process of a number of generically similar casing and tankage systems. There are three copies in the file, one of these is loose.

Eck, Marshall B.; Mukunda, Meera

1988-10-01T23:59:59.000Z

335

E-Print Network 3.0 - affecting soil fauna Sample Search Results  

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

on florafauna or human health; *affect on landscape and natural... result in : *air pollution; *soil and water pollution; *affect on florafauna or human health; *affect... ......

336

E-Print Network 3.0 - affecting soil loss Sample Search Results  

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

affected by salts, especially sodium (Na), and soils affected by fluctuating high water tables... that affect rooting. Rooting problems can be caused by-- abrupt...

337

Half tetrad analysis in alfalfa using multiple restriction fragment length polymorphism markers S. Tavoletti, E. T. Bingham, B. S. Yandell, F. Veronesi, and T. C. Osborn  

E-Print Network [OSTI]

Half tetrad analysis in alfalfa using multiple restriction fragment length polymorphism markers S Genetics Half tetrad analysis in alfalfa using multiple restriction fragment length polymorphism markers alfalfa clone PG-F9 (2n = 2x = 16) previously selected because of its high frequency of 2n egg production

Yandell, Brian S.

338

Three-dimensional fracture and fragmentation of artificial kidney stones This article has been downloaded from IOPscience. Please scroll down to see the full text article.  

E-Print Network [OSTI]

Three-dimensional fracture and fragmentation of artificial kidney stones This article has been IOPscience #12;Three-dimensional fracture and fragmentation of artificial kidney stones Alejandro Mota1 Laboratory Livermore, CA 94550, USA July 25, 2006 Abstract The brittle fracture of a gypsum cylinder, which

Ortiz, Michael

339

Coulomb and even-odd effects in cold and super-asymmetric fragmentation for thermal neutron induced fission of 235U  

E-Print Network [OSTI]

The Coulomb effects hypothesis is used to interpret even-odd effects of maximum total kinetic energy as a function of mass and charge of fragments from thermal neutron induced fission of 235U. Assuming spherical fragments at scission, the Coulomb interaction energy between fragments (C_sph) is higher than the Q-value, the available energy. Therefore at scission the fragments must be deformed, so that the Coulomb interaction energy does not exceed the Q-value. The fact that the even-odd effects in the maximum total kinetic energy as a function of the charge and mass, respectively, are lower than the even-odd effects of Q is consistent with the assumption that odd mass fragments are softer than the even-even fragments. Even-odd effects of charge distribution in super asymmetric fragmentation also are interpreted with the Coulomb effect hypothesis. Because the difference between C_sph and Q increases with asymmetry, fragmentations require higher total deformation energy to occur. Higher deformation energy of the...

Montoya, Modesto

2015-01-01T23:59:59.000Z

340

On the structure and the behaviour of Collatz 3n + 1 sequences - Finite subsequences and the role of the Fibonacci sequence  

E-Print Network [OSTI]

It is shown that every Collatz sequence $C(s)$ consists only of same structured finite subsequences $C^h(s)$ for $s\\equiv9\\ (mod\\ 12)$ or $C^t(s)$ for $s\\equiv3,7\\ (mod\\ 12)$. For starting numbers of specific residue classes ($mod\\ 12\\cdot2^h$) or ($mod\\ 12\\cdot2^{t+1}$) the finite subsequences have the same length $h,t$. It is conjectured that for each $h,t\\geq2$ the number of all admissible residue classes is given exactly by the Fibonacci sequence. This has been proved for $2\\leq h,t\\leq50$. Collatz's conjecture is equivalent to the conjecture that for each $s\\in\\mathbb{N},s>1$, there exists $k\\in\\mathbb{N}$ such that $T^k(s)It is shown that Collatz's conjecture is true, if every starting number $s\\equiv3,7\\ (mod\\ 12)$ have finite stopping time. We denote $\\tau(s)$ as the number of $C^t(s)$ until $\\sigma(s)$ is reached for a starting number $s\\equiv3,7\\ (mod\\ 12)$. Starting numbers of specific residue classes ($mod\\ 3\\cdot2^{\\sigma(s)}$) have the same stopping times $\\sigma(s)$ and $\\tau(s)$. By using $\\tau(s)$ it is shown that almost all $s\\equiv3,7\\ (mod\\ 12)$ have finite stopping time and statistically two out of three $s\\equiv3,7\\ (mod\\ 12)$ have $\\tau(s)=1$. Further it is shown what consequences it entails, if a $C(s)$ grows to infinity.

Mike Winkler

2014-11-27T23:59:59.000Z

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

Weather conditions affecting VTOL airbus operations in the Northeast Corridor  

E-Print Network [OSTI]

A detailed study of hourly weather observations in the Northeast Corridor during the periods 0600-2400 for a ten year period 1944-1958 was made to study the implications of weather affecting the operations of a VSTOL Airbus ...

Simpson, R. W.

1966-01-01T23:59:59.000Z

342

affect social learning: Topics by E-print Network  

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

positive or negative affect from upward and downward comparisons. In Study 1, cancer patients low in self-esteem and with low perceived control over their symptoms and illness...

343

Factors affecting the selling prices of small firms  

E-Print Network [OSTI]

58 percent of the jobs in the United Stated are created by firms with fewer than 500 employees (Davis, et al. [1998]). Yet, there is only limited research done on the industry trends and conditions affecting small company ...

Somervuo, Timo J. (Timo Juhani)

2008-01-01T23:59:59.000Z

344

affecting helicobacter pylori: Topics by E-print Network  

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

affecting helicobacter pylori First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 ??? ???...

345

affects protein metabolism: Topics by E-print Network  

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

Chad J. Johnson a; Allen Herbst; Camilo Duque-velasquez; Joshua P. V; Phil Bochsler; Debbie Mckenzie 2011-01-01 31 Systematic Variation of Prosthetic Foot Spring Affects...

346

How the Koontz Decision May Affect Climate Change Policy  

Broader source: Energy.gov [DOE]

Please join us for a Sept. 10 webinar to discuss the Supreme Court's controversial decision in Koontz v. St. Johns River Water Management District and explore how the decision may affect the...

347

Eliciting and detecting affect in covert and ethically sensitive situations  

E-Print Network [OSTI]

There is growing interest in creating systems that can sense the affective state of a user for a variety of applications. As a result, a large number of studies have been conducted with the goals of eliciting specific ...

Davis, Philip Charles

2005-01-01T23:59:59.000Z

348

Understanding 'It': Affective Authenticity, Space, and the Phish Scene  

E-Print Network [OSTI]

"Understanding It: Affective Authenticity, Space, and the Phish Scene" is an ethnographic study of "scene identity" around the contemporary rock band Phish. Utilizing data generated from six years of ethnographic fieldwork, ...

Yeager, Elizabeth Anne

2011-04-26T23:59:59.000Z

349

Traits Affecting Household Livestock Marketing Decisions in Rural Kenya  

E-Print Network [OSTI]

Traits Affecting Household Livestock Marketing Decisions in Rural Kenya Katherine L. Baldwin community of Central Kenya, we regressed household offtake rate of both cattle and smallstock against in Kenya. Because pastoralist economies depend almost exclusively upon livestock production, most recent

350

Transformation induced plasticity assisted steels: stress or strain affected martensitic  

E-Print Network [OSTI]

Transformation induced plasticity assisted steels: stress or strain affected martensitic transformation? S. Chatterjee and H. K. D. H. Bhadeshia* Transformation induced plasticity (TRIP) assisted steels contain a small quantity of carbon enriched retained austenite, which transforms into martensite during

Cambridge, University of

351

affects cluster root: Topics by E-print Network  

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

is an important determinant of the form of the root system. It affects the way and for cultivation systems which can influence tree growth and anchorage. This review discusses...

352

Design Optimisation of a High Intensity Beam Facility and Feasibility Experiment of a Solid Fragmented Target  

E-Print Network [OSTI]

The present PhD thesis describes the design, execution and results of the HRMT-10 experiment performed at the HiRadMat facility of the CERN/SPS complex. The ?rst part of the thesis covers the design optimization studies of the HiRadMat facility, focusing in particular on the radiation protection issues. A detailed Monte-Carlo model of the facility has been developed and validated through comparison with measurements. A very satisfactory agreement between the simulation and the experimental data is observed. In the second part of this thesis, a novel feasibility experiment of a fragmented solid target for a future Neutrino Factory or a Super Beam facility, able to support high beam powers ( 1 MW) is presented in detail. A solid granular target has been proposed as an interesting alternative to an open Hg jet target, presently considered as the baseline for such facilities, but posing considerable technical challenges. The HRMT-10 experiment seeks to address the lack of experimental data of the feasibility of...

Charitonidis, Nikolaos; Rivkin, Leonid

2014-06-13T23:59:59.000Z

353

Ultrafast probing of ejection dynamics of Rydberg atoms and molecular fragments from electronically excited helium nanodroplets  

SciTech Connect (OSTI)

The ejection dynamics of Rydberg atoms and molecular fragments from electronically excited helium nanodroplets are studied with time-resolved extreme ultraviolet ion imaging spectroscopy. At excitation energies of 23.6 {+-} 0.2 eV, Rydberg atoms in n= 3 and n= 4 states are ejected on different time scales and with significantly different kinetic energy distributions. Specifically, n= 3 Rydberg atoms are ejected with kinetic energies as high as 0.85 eV, but their appearance is delayed by approximately 200 fs. In contrast, n= 4 Rydberg atoms appear within the time resolution of the experiment with considerably lower kinetic energies. Major features in the Rydberg atom kinetic energy distributions for both principal quantum numbers can be described within a simple elastic scattering model of localized perturbed atomic Rydberg atoms that are expelled from the droplet due to their repulsive interaction with the surrounding helium bath. Time-dependent kinetic energy distributions of He{sub 2}{sup +} and He{sub 3}{sup +} ions are presented that support the formation of molecular ions in an indirect droplet ionization process and the ejection of neutral Rydberg dimers on a similar time scale as the n= 3 Rydberg atoms.

Buenermann, Oliver; Kornilov, Oleg; Neumark, Daniel M. [Ultrafast X-ray Science Laboratory, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Department of Chemistry, University of California, Berkeley, California 94720 (United States); Haxton, Daniel J.; Gessner, Oliver [Ultrafast X-ray Science Laboratory, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Leone, Stephen R. [Ultrafast X-ray Science Laboratory, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Department of Chemistry, University of California, Berkeley, California 94720 (United States); Department of Physics, University of California, Berkeley, California 94720 (United States)

2012-12-07T23:59:59.000Z

354

Recombinant GDNF: Tetanus toxin fragment C fusion protein produced from insect cells  

SciTech Connect (OSTI)

Glial cell line-derived neurotrophic factor (GDNF) has potent survival-promoting effects on CNS motor neurons in experimental animals. Its therapeutic efficacy in humans, however, may have been limited by poor bioavailability to the brain and spinal cord. With a view toward improving delivery of GDNF to CNS motor neurons in vivo, we generated a recombinant fusion protein comprised of rat GDNF linked to the non-toxic, neuron-binding fragment of tetanus toxin. Recombinant GDNF:TTC produced from insect cells was a soluble homodimer like wild-type GDNF and was bi-functional with respect to GDNF and TTC activity. Like recombinant rat GDNF, the fusion protein increased levels of immunoreactive phosphoAkt in treated NB41A3-hGFR{alpha}-1 neuroblastoma cells. Like TTC, GDNF:TTC bound to immobilized ganglioside GT1b in vitro with high affinity and selectivity. These results support further testing of recombinant GDNF:TTC as a non-viral vector to improve delivery of GDNF to brain and spinal cord in vivo.

Li, Jianhong; Chian, Ru-Ju; Ay, Ilknur; Celia, Samuel A.; Kashi, Brenda B.; Tamrazian, Eric; Matthews, Jonathan C. [Cecil B. Day Laboratory for Neuromuscular Research, Department of Neurology, Massachusetts General Hospital, Charlestown, MA 02129 (United States)] [Cecil B. Day Laboratory for Neuromuscular Research, Department of Neurology, Massachusetts General Hospital, Charlestown, MA 02129 (United States); Remington, Mary P. [Research Service, Baltimore Veterans Affairs Medical Center, Baltimore, MD 21201 (United States)] [Research Service, Baltimore Veterans Affairs Medical Center, Baltimore, MD 21201 (United States); Pepinsky, R. Blake [BiogenIdec, Inc., 14 Cambridge Center, Cambridge, MA 02142 (United States)] [BiogenIdec, Inc., 14 Cambridge Center, Cambridge, MA 02142 (United States); Fishman, Paul S. [Research Service, Baltimore Veterans Affairs Medical Center, Baltimore, MD 21201 (United States) [Research Service, Baltimore Veterans Affairs Medical Center, Baltimore, MD 21201 (United States); Department of Neurology, University of Maryland School of Medicine, Baltimore, MD 21201 (United States); Brown, Robert H. [Cecil B. Day Laboratory for Neuromuscular Research, Department of Neurology, Massachusetts General Hospital, Charlestown, MA 02129 (United States)] [Cecil B. Day Laboratory for Neuromuscular Research, Department of Neurology, Massachusetts General Hospital, Charlestown, MA 02129 (United States); Francis, Jonathan W., E-mail: jwfrancisby@gmail.com [Cecil B. Day Laboratory for Neuromuscular Research, Department of Neurology, Massachusetts General Hospital, Charlestown, MA 02129 (United States)

2009-07-31T23:59:59.000Z

355

Interpretation of the Stephan Quintet Galaxy Cluster using Hydro-Gravitational-Dynamics: Viscosity and Fragmentation  

E-Print Network [OSTI]

Stephan's Quintet (SQ) is a compact group of galaxies that has been well studied since its discovery in 1877 but is mysterious using cold dark matter hierarchical clustering cosmology (CDMHCC). Anomalous red shifts $z = (0.0027,0.019, 0.022, 0.022, 0.022)$ among galaxies in SQ either reduce it to a Trio with two highly improbable intruders from CDMHCC or support the Arp (1973) hypothesis that its red shifts are intrinsic. An alternative is provided by the Gibson 1996-2006 hydro-gravitational-dynamics (HGD) theory where superclusters, clusters and galaxies all originate by gravitational fragmentation in the super-viscous plasma epoch and at planetary and star cluster mass scales in the primordial gas of the expanding universe. By this fluid-mechanical cosmology, the SQ galaxies gently separate and remain precisely along a line of sight because of perspective and the small transverse velocities permitted by their sticky viscous-gravitational beginnings. Star and gas bridges and young-globular-star-cluster (YGC) trails observed by the Hubble Space Telescope are triggered as SQ galaxies separate through viscous baryonic-dark-matter halos of dark proto-globular-cluster (PGC) clumps of frozen Earth-mass primordial-fog-particles (PFPs).

Carl H. Gibson; Rudolph E. Schild

2007-10-31T23:59:59.000Z

356

Simulations of Fracture and Fragmentation of Geologic Materials using Combined FEM/DEM Analysis  

SciTech Connect (OSTI)

Results are presented from a study investigating the effect of explosive and impact loading on geological media using the Livermore Distinct Element Code (LDEC). LDEC was initially developed to simulate tunnels and other structures in jointed rock masses with large numbers of intact polyhedral blocks. However, underground structures in jointed rock subjected to explosive loading can fail due to both rock motion along preexisting interfaces and fracture of the intact rock mass itself. Many geophysical applications, such as projectile penetration into rock, concrete targets, and boulder fields, require a combination of continuum and discrete methods in order to predict the formation and interaction of the fragments produced. In an effort to model these types of problems, we have implemented Cosserat point theory and cohesive element formulations into the current version of LDEC, thereby allowing for dynamic fracture and combined finite element/discrete element simulations. Results of a large-scale LLNL simulation of an explosive shock wave impacting an elaborate underground facility are also discussed. It is confirmed that persistent joints lead to an underestimation of the impact energy needed to fill the tunnel systems with rubble. Non-persistent joint patterns, which are typical of real geologies, inhibit shear within the surrounding rock mass and significantly increase the load required to collapse a tunnel.

Morris, J P; Rubin, M B; Block, G I; Bonner, M P

2005-05-26T23:59:59.000Z

357

A short Id2 protein fragment containing the nuclear export signal forms amyloid-like fibrils  

SciTech Connect (OSTI)

The negative regulator of DNA-binding/cell-differentiation Id2 is a small protein containing a central helix-loop-helix (HLH) motif and a C-terminal nuclear export signal (NES). Whereas the former is essential for Id2 dimerization and nuclear localization, the latter is responsible for the transport of Id2 from the nucleus to the cytoplasm. Whereas the isolated Id2 HLH motif is highly helical, large C-terminal Id2 fragments including the NES sequence are either unordered or aggregation-prone. To study the conformational properties of the isolated NES region, we synthesized the Id2 segment 103-124. The latter was insoluble in water and only temporarily soluble in water/alcohol mixtures, where it formed quickly precipitating {beta}-sheets. Introduction of a positively charged N-terminal tail prevented aggressive precipitation and led to aggregates consisting of long fibrils that bound thioflavin T. These results show an interesting structural aspect of the Id2 NES region, which might be of significance for both protein folding and function.

Colombo, Noemi [Fakultaet fuer Chemie und Pharmazie, Universitaet Regensburg, Universitaetsstrasse 31, 93053 Regensburg (Germany); Schroeder, Josef [Institut fuer Pathologie, Zentrales EM-Labor, Fakultaet fuer Medizin, Universitaet Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg (Germany); Cabrele, Chiara [Fakultaet fuer Chemie und Pharmazie, Universitaet Regensburg, Universitaetsstrasse 31, 93053 Regensburg (Germany)]. E-mail: chiara.cabrele@chemie.uni-regensburg.de

2006-07-21T23:59:59.000Z

358

Perturbative approximation to hybrid equation of motion coupled cluster/effective fragment potential method  

SciTech Connect (OSTI)

Hybrid quantum mechanics/molecular mechanics (QM/MM) methods provide an attractive way to closely retain the accuracy of the QM method with the favorable computational scaling of the MM method. Therefore, it is not surprising that QM/MM methods are being increasingly used for large chemical/biological systems. Hybrid equation of motion coupled cluster singles doubles/effective fragment potential (EOM-CCSD/EFP) methods have been developed over the last few years to understand the effect of solvents and other condensed phases on the electronic spectra of chromophores. However, the computational cost of this approach is still dominated by the steep scaling of the EOM-CCSD method. In this work, we propose and implement perturbative approximations to the EOM-CCSD method in this hybrid scheme to reduce the cost of EOM-CCSD/EFP. The timings and accuracy of this hybrid approach is tested for calculation of ionization energies, excitation energies, and electron affinities of microsolvated nucleic acid bases (thymine and cytosine), phenol, and phenolate.

Ghosh, Debashree, E-mail: debashree.ghosh@gmail.com [Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008 (India)] [Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008 (India)

2014-03-07T23:59:59.000Z

359

Three-dimensional textural and compositional analysis of particle tracks and fragmentation history in aerogel  

SciTech Connect (OSTI)

We report analyses of aerogel tracks using (1) synchrotron X-ray computed microtomography (XRCMT), (2) laser confocal scanning microscopy (LCSM), and (3) synchrotron radiation X-ray fluorescence (SRXRF) of particles and their paths resulting from simulated hypervelocity impacts (1-2), and a single {approx}1 mm aerogel track from the Stardust cometary sample collector (1-3). Large aerogel pieces can be imaged sequentially, resulting in high spatial resolution images spanning many tomographic fields of view ('lambda-tomography'). We report calculations of energy deposited, and tests on aromatic hydrocarbons showing no alteration in tomography experiments. Imaging at resolutions from -17 to -1 micron/pixel edge (XRCMT) and to <100 nm/pixel edge (LCSM) illustrates track geometry and interaction of particles with aerogel, including rifling, particle fragmentation, and final particle location. We present a 3-D deconvolution method using an estimated point-spread function for aerogel, allowing basic corrections of LCSM data for axial distortion. LCSM allows rapid, comprehensive, non-destructive, high information return analysis of tracks in aerogel keystones, prior to destructive grain extraction. SRXRF with LCSM allows spatial correlation of grain size, chemical, and mineralogical data. If optical methods are precluded in future aerogel capture missions, XRCMT is a viable 3D imaging technique. Combinations of these methods allow for complete, nondestructive, quantitative 3-D analysis of captured materials at high spatial resolution. This data is fundamental to understanding the hypervelocity particle-aerogel interaction histories of Stardust grains.

Ebel, Denton S.; Greenberg, Michael; Rivers, Mark L.; Newville, Matthew; (AMNH)

2010-05-04T23:59:59.000Z

360

Factors affecting attitudinal patterns toward education in the Dominican Republic  

E-Print Network [OSTI]

FACTORS AF'FECTING ATTITUDINAL PATTERNS TOWARD EDUCATION IN THE DOHINICAN REPUBLIC A Thesi. s by EDWIN HUGH CARPENTER Submitted to the Graduate College of the Texas A&M University in partial fulfillment of the requirements for the degree... of NASTER OF SCIENCE August 1968 Major Sub)sot: Sociology FACTORS AFFECTING ATTITUDINAL PATTERNS TOWARD EDUCATION IN THE DOMINICAN REPUBLIC A Thesis by EDWIN HUGH CARPENTER Approved as to style and content by: (Chairman gf Commit tee) (Head...

Carpenter, Edwin Hugh

1968-01-01T23:59:59.000Z

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361

Academic programs and services that affect student athlete success  

E-Print Network [OSTI]

ACADEMIC PROGRAMS AND SERVICES THAT AFFECT STUDENT ATHLETE SUCCESS A Thesis by CHERYL REBECCA RODE 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 May 2008 Major Subject: Kinesiology ACADEMIC PROGRAMS AND SERVICES THAT AFFECT STUDENT ATHLETE SUCCESS A Thesis by CHERYL REBECCA RODE Submitted to the Office of Graduate Studies of Texas A&M University...

Rode, Cheryl Rebecca

2009-05-15T23:59:59.000Z

362

Gasoline Engine Economy as Affected by the Time of Ignition  

E-Print Network [OSTI]

KU ScholarWorks | The University of Kansas Pre-1923 Dissertations and Theses Collection Gasoline Engine Economy as Affected by the Time of Ignition 1907 by George Jay Hopkins This work was digitized by the Scholarly Communications program staff... in the KU Libraries’ Center for Digital Scholarship. http://kuscholarworks.ku.edu Submitted to the University of Kansas in partial fulfillment of the requirements for the Degree of Bachelor of Science GASOLINE ENCUNE ECONOMY as Affected W the Time...

Hopkins, George Jay

1907-01-01T23:59:59.000Z

363

Effect of beta-electron capture to a bound state on delayed-neutron emission from fission fragments  

SciTech Connect (OSTI)

The effect of ionization of the atomic electron shell on beta decay is investigated. The change in the beta-decay probability is due primarily to the appearance of the channel involving beta-electron capture to a bound state. It is shown that the effect may be significant at low beta-transition energies. The magnitude of the effect was studied in the case of the emission of one to three delayed neutrons following the beta decay of fission fragments. In the calculations, use was made of the beta-decay strength function with allowance for the population of isobaric resonances in daughter nuclei. The effect proved to be maximal for fragments where the numbers of protons and neutrons approach those in closed shells and subshells, thereby illustrating the role of the shell structure of the nucleus in fission.

Gangrsky, Yu. P. [Joint Institute for Nuclear Research (Russian Federation); Karpeshin, F. F. [St. Petersburg State University, Institute of Physics (Russian Federation); Trzhaskovskaya, M. B., E-mail: trzhask@thd.pnpi.spb.r [Russian Academy of Sciences, Petersburg Nuclear Physics Institute (Russian Federation); Penionzhkevich, Yu. E. [Joint Institute for Nuclear Research (Russian Federation)

2008-06-15T23:59:59.000Z

364

Study of heavy ion induced fission fragment angular and mass distribution at near and sub-coulomb barrier energies  

E-Print Network [OSTI]

The thesis presents investigations on the angular and mass distribution of fission fragments on heavy ion induced fission reactions. The present investigations address current issues in heavy ion induced fission reactions like finding the optimum entrance channel for the synthesis of super heavy elements (SHE). A double arm time of flight spectrometer over long flight path was used to measure the precise masses of complementary fission fragments. Necessary large area position sensitive gas detectors, the method of experiments and data analysis were developed. The first string of measurements were for a spherical target (209^Bi) with oxygen and fluorine projectiles. The next series of experiments were done using a deformed target (232^Th) with fluorine, oxygen and carbon projectiles.

T. K. Ghosh

2005-08-10T23:59:59.000Z

365

Interaction of toluene with two-color asymmetric laser fields: Controlling the directional emission of molecular hydrogen fragments  

SciTech Connect (OSTI)

The interaction of toluene with strong asymmetric two-color laser irradiation of 40 fs duration is studied by means of Time of flight mass spectrometry. Highly energetic H{sub 2}{sup +} and H{sub 3}{sup +} fragment ions are produced through an isomerization process taking place within transient multiply charged parent ions. Comparative study of deuterium labeled toluene isotopes enables the discrimination between molecular hydrogen fragments formed exclusively within the CH{sub 3}- part from those that require hydrogen atom exchange between the former and the phenyl moiety. It is demonstrated that by manipulating the relative phase of the ?/2? field components the selective ionization of oriented toluene molecules can be used as a tool to control the directional emission of the H{sub 2}{sup +}, H{sub 3}{sup +} species.

Kaziannis, S.; Kotsina, N.; Kosmidis, C. [Department of Physics, Atomic and Molecular Physics Laboratory, University of Ioannina, University Campus, Ioannina GR-45110 (Greece)

2014-09-14T23:59:59.000Z

366

Fragmentation mechanisms for methane induced by 55 eV, 75 eV, and 100 eV electron impact  

SciTech Connect (OSTI)

The fragmentation of CH{sub 4}{sup 2+} dications following 55 eV, 75 eV, and 100 eV electron impact double ionization of methane was studied using a cold target recoil-ion momentum spectroscopy. From the measured momentum of each recoil ion, the momentum of the neutral particles has been deduced and the kinetic energy release distribution for the different fragmentation channels has been obtained. The doubly charged molecular ions break up into three or more fragments in one or two-step processes, resulting in different signatures in the data. We observed the fragmentation of CH{sub 4}{sup 2+} dications through different mechanisms according to the momentum of the neutral particles. For example, our result shows that there are three reaction channels to form CH{sub 2}{sup +}, H{sup +}, and H, one synchronous concerted reaction channel and two two-step reaction channels. For even more complicated fragmentation processes of CH{sub 4}{sup 2+} dications, the fragmentation mechanism can still be identified in the present measurements. The slopes of the peak in the ion-ion coincidence spectra were also estimated here, as they are also related to the fragmentation mechanism.

Wei, B.; Zhang, Y.; Wang, X., E-mail: xinchengwang@fudan.edu.cn; Lu, D.; Lu, G. C.; Hutton, R.; Zou, Y. [Applied Ion Beam Physics Laboratory, Fudan University, Key Laboratory of the Ministry of Education, Shanghai 200433 (China) [Applied Ion Beam Physics Laboratory, Fudan University, Key Laboratory of the Ministry of Education, Shanghai 200433 (China); Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, Shanghai 200433 (China); Zhang, B. H.; Tang, Y. J. [Research Center of Laser Fusion, China Academy of Engineering Physics, P.O. Box 919-986, Mianyang 621900 (China)] [Research Center of Laser Fusion, China Academy of Engineering Physics, P.O. Box 919-986, Mianyang 621900 (China)

2014-03-28T23:59:59.000Z

367

Evaluation of low-cycle fatigue crack growth and subsequent ductile fracture for cracked pipe experiments using cyclic J-integral  

SciTech Connect (OSTI)

Piping for LWR power plants is required to satisfy the Leak-Before-Break concept for postulated (not actual) defects. With this in mind, numerous research has so far been conducted on the fatigue crack growth under cyclic loading, and on the ductile crack growth under excessive loading. Study on cracked pipe fracture under cyclic loading gains much attention from the viewpoint of the Leak-Before-Break concept for seismic loading that accompanies large-scale yielding. An evaluation method based on cyclic J-integral was newly developed to predict the low-cycle fatigue crack growth and the subsequent ductile fracture for cyclic loading that accompanies large-scale yielding. Cyclic J-integral was introduced to describe the crack growth up to failure. The method was applied to 4-inch diameter circumferentially through-wall-cracked carbon steel base metal pipes and welded pipe joints subjected to cyclic 4-point bending at room temperature and high temperature of approximately 300 C. Fatigue crack growth behavior and failure life were successfully predicted by the proposed approach.

Miura, Naoki; Fujioka, Terutaka; Kashima, Koichi [CRIEPI, Tokyo (Japan); Miyazaki, Katsumasa; Kanno, Satoshi; Hayashi, Makoto; Ishiwata, Masayuki; Gotoh, Nobuho [Hitachi, Ltd., Ibaraki (Japan)

1996-12-01T23:59:59.000Z

368

FRAGMENTATION AND EVOLUTION OF MOLECULAR CLOUDS. III. THE EFFECT OF DUST AND GAS ENERGETICS  

SciTech Connect (OSTI)

Dust and gas energetics are incorporated into a cluster-scale simulation of star formation in order to study the effect of heating and cooling on the star formation process. We build on our previous work by calculating separately the dust and gas temperatures. The dust temperature is set by radiative equilibrium between heating by embedded stars and radiation from dust. The gas temperature is determined using an energy-rate balance algorithm which includes molecular cooling, dust-gas collisional energy transfer, and cosmic-ray ionization. The fragmentation proceeds roughly similarly to simulations in which the gas temperature is set to the dust temperature, but there are differences. The structure of regions around sink particles has properties similar to those of Class 0 objects, but the infall speeds and mass accretion rates are, on average, higher than those seen for regions forming only low-mass stars. The gas and dust temperature have complex distributions not well modeled by approximations that ignore the detailed thermal physics. There is no simple relationship between density and kinetic temperature. In particular, high-density regions have a large range of temperatures, determined by their location relative to heating sources. The total luminosity underestimates the star formation rate at these early stages, before ionizing sources are included, by an order of magnitude. As predicted in our previous work, a larger number of intermediate-mass objects form when improved thermal physics is included, but the resulting initial mass function (IMF) still has too few low-mass stars. However, if we consider recent evidence on core-to-star efficiencies, the match to the IMF is improved.

Martel, Hugo [Departement de Physique, de Genie Physique et d'Optique, Universite Laval, Quebec, QC, G1V 0A6 (Canada); Urban, Andrea [Sapling Learning, Inc., 2815 Exposition Blvd, Austin, TX 78703 (United States); Evans, Neal J. II [Department of Astronomy, University of Texas, 2515 Speedway, Stop C1400, Austin, TX 78712-1205 (United States)

2012-09-20T23:59:59.000Z

369

The Effects of Habitat Fragmentation on the Behavior of the Cotton Rat (Sigmodon hispidus):Phase II  

SciTech Connect (OSTI)

The authors studied the movements of cotton rats and cotton mice in experimental landscapes at the SRS in order to determine the effects of fragmentation and connectivity between habitat patches on dispersal movements and population dynamics. Densities between connected and isolated patches were not different. Small patches tended to support higher densities. Cotton rats were more common in corridors than expected and cotton mice were more likely to leave by a corridor.

Barrett, G.W.; Drelin, E.A.; Mabry, K.E.

2001-07-01T23:59:59.000Z

370

Fragmentation cross sections of 28Si at beam energies from 290AMeV to 1200A MeV  

SciTech Connect (OSTI)

In planning for long-duration spaceflight, it will beimportant to accurately model the exposure of astronauts to heavy ions inthe Galactic Cosmic Rays (GCR). As part of an ongoing effort to improveheavy-ion transport codes that will be used in designing futurespacecraft and habitats, fragmentation cross sections of 28Si have beenmeasured using beams with extracted energies from 290A MeV to 1200A MeV,spanning most of the peak region of the energy distribution of siliconions in the GCR. Results were obtained for six elemental targets:hydrogen, carbon, aluminum, copper, tin, and lead. The charge-changingcross sections are found to be energy-independent within the experimentaluncertainties, except for those on the hydrogen target. Cross sectionsfor the heaviest fragments are found to decrease slightly with increasingenergy for lighter targets, but increase with energy for tin and leadtargets. The cross sections are compared to previous measurements atsimilar energies, and to predictions of the NUCFRG2 model used by NASA toevaluate radiation exposures in flight. For charge-changing crosssections, reasonable agreement is found between the present experimentand those of Webber, et al. and Flesch, et al., and NUCFRG2 agrees withthe data to within 3 percent in most cases. Fragment cross sections showless agreement between experiments, and there are substantial differencesbetween NUCFRG2 predictions andthe data.

Zeitlin, C.; Fukumura, A.; Guetersloh, S.B.; Heilbronn, L.H; Iwata, Y.; Miller, J.; Murukami, T.

2006-08-25T23:59:59.000Z

371

Numerical study of effect of the gas-coolant free surface on the droplet fragmentation behavior of coolants  

SciTech Connect (OSTI)

This paper presents results of a numerical investigation on the behavior of melt drops falling in a gas (vapor) space and then penetrating into a liquid volume through the gas-liquid interface. The phenomenon studied here is, usually, observed when a liquid drop falls through air into a water pool and is, specially, of interest when a hypothetical severe reactor core meltdown accident is considered. The objective of this work is to study the effect of the gas-liquid interface on the dynamic evolution of the interaction area between the fragmenting melt drop and water. In the present study, the Navier-Stokes equations are solved for three phases (gas, liquid and melt-drop) using a higher-order, explicit, numerical method, called Cubic-Interpolated Pseudo-Particle (CIP) method, which is employed in combination with an advanced front-capturing scheme, named the Level Set Algorithm (LSA). By using this method, reasonable physical pictures of droplet deformation and fragmentation during movement in a stationary uniform water pool, and in a gas-liquid two-layer volume, is simulated. Effect of the gas-liquid interface on the drop deformation and fragmentation is analyzed by comparing the simulation results obtained for the two cases. Effects of the drop geometry, and of the flow conditions, on the behavior of the melt drop are also analyzed.

Li, H.X.; Anh, B.V.; Dinh, T.N.; Sehgal, B.R.

1999-07-01T23:59:59.000Z

372

Description of Induced Nuclear Fission with Skyrme Energy Functionals: I. Static Potential Energy Surfaces and Fission Fragment Properties  

E-Print Network [OSTI]

Eighty years after its experimental discovery, a microscopic description of induced nuclear fission based solely on the interactions between neutrons and protons and quantum many-body methods still poses formidable challenges. The goal of this paper is to contribute to the development of a predictive microscopic framework for the accurate calculation of static properties of fission fragments for hot fission and thermal or slow neutrons. To this end, we focus on the 239Pu(n,f) reaction and employ nuclear density functional theory with Skyrme energy densities. Potential energy surfaces are computed at the Hartree-Fock-Bogoliubov approximation with up to five collective variables. We find that the triaxial degree of freedom plays an important role, both near the fission barrier and at scission. The impact of the parameterization of the Skyrme energy density on deformation properties from the ground-state up to scission is also quantified. We introduce a general template for the detailed description of fission fragment properties. It is based on the careful analysis of the scission point, using both advanced topological methods and recently proposed quantum many-body techniques. We conclude that an accurate prediction of fission fragment properties at low incident neutron energies, although technologically demanding, should be within the reach of current nuclear density functional theory.

N. Schunck; D. Duke; H. Carr; A. Knoll

2014-09-17T23:59:59.000Z

373

Influence of site-specific geology on oil shale fragmentation experiments at the Colony Mine, Garfield County, Colorado  

SciTech Connect (OSTI)

The Los Alamos National Laboratory executed 19 intermediate scale cratering experiments in oil shale at the Colony Mine in Garfield County, Colorado. These experiments have led to a better understanding of fracture characteristics and fragmentation of in situ oil shale by use of a conventional high explosive. Geologic site characterization included detailed mapping, coring, and sample analyses. Site-specific geology was observed to be a major influence on the resulting crater geometry. The joint patterns at the experimental site frequently defined the final crater symmetry. Secondary influences included vugs, lithology changes, and grade fluctuations in the local stratigraphy. Most experiments, in both the rib and floor, were conducted to obtain data to investigate the fragmentation results within the craters. The rubble was screened for fragment-size distributions. Geologic features in proximity to the explosive charge had minimal effect on the rubble due to the overpowering effect of the detonation. However, these same features became more influential on the fracture and rubble characteristics with greater distances from the shothole. Postshot cores revealed a direct relationship between the grade of the oil shale and its susceptibility to fracturing. The Colony Mine experiments have demonstrated the significant role of geology in high explosive/oil shale interaction. It is probable that this role will have to be considered for larger applications to blast patterns and potential problems in retort stability in the future of oil shale development.

Ray, J.M.; Harper, M.D.; Craig, J.L.; Edwards, C.L.

1982-01-01T23:59:59.000Z

374

Primary Isotope Yields and Characteristic Properties of the Fragmenting Source in Heavy-ion Reactions near the Fermi Energies  

E-Print Network [OSTI]

For central collisions of $^{40}$Ca $+ ^{40}$Ca at 35 MeV/nucleon, the density and temperature of a fragmenting source have been evaluated in a self-consistent manner using the ratio of the symmetry energy coefficient relative to the temperature, $a_{sym}/T$, extracted from the yields of primary isotopes produced in antisymmetrized molecular dynamics (AMD) simulations. The $a_{sym}/T$ values are extracted from all isotope yields using an improved method based on the Modified Fisher Model (MFM). The values of $a_{sym}/T$ obtained, using different interactions with different density dependencies of the symmetry energy term, are correlated with the values of the symmetry energies at the density of fragment formation. Using this correlation, the fragment formation density is found to be $\\rho/\\rho_0 = 0.67 \\pm 0.02$. Using the input symmetry energy value for each interaction temperature values are extracted as a function of isotope mass $A$. The extracted temperature values are compared with those evaluated from the fluctuation thermometer with a radial flow correction.

X. Liu; W. Lin; R. Wada; M. Huang; Z. Chen; G. Q. Xiao; S. Zhang; X. Jin; J. Liu; F. Shi; P. Ren; H. Zheng; J. B. Natowitz; A. Bonasera

2014-06-13T23:59:59.000Z

375

Bone breakage in laying hens as affected by dietary supplements  

E-Print Network [OSTI]

BONE BREAKAGE IN LAYING HENS AS AFFECTED BY DIETARY SUPPLEMENTS A Thesis by DAVID JOE MOORE Submitted to the Graduate College of Texas Al!M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1975... Major Subject: Poultry Science (Physiology) BONE BREAKAGE IN LAYING HENS AS AFFECTED BY DIETARY SUPPLEMENTS A Thesis by DAVID JOE MOORE Approved as to style and content by: Chairman of Comm' ee ad o Department) Member Member '7 I ls&wr g ~, /0...

Moore, David Joe

1975-01-01T23:59:59.000Z

376

Entropy is the Major Driving Force for Fragmentation of Proteins and  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing Zirconia NanoparticlesSmartAffects the FutureEnrico Rossi

377

Three-dimensional Simulation of Magnetized Cloud Fragmentation Induced by Nonlinear Flows and Ambipolar Diffusion  

E-Print Network [OSTI]

We demonstrate that the formation of collapsing cores in subcritical clouds is accelerated by nonlinear flows, by performing three-dimensional non-ideal MHD simulations. An initial random supersonic (and trans-Alfvenic) turbulent-like flow is input into a self-gravitating gas layer that is threaded by a uniform magnetic field (perpendicular to the layer) such that the initial mass-to-flux ratio is subcritical. Magnetic ambipolar diffusion occurs very rapidly initially due to the sharp gradients introduced by the turbulent flow. It subsequently occurs more slowly in the traditional near-quasistatic manner, but in regions of greater mean density than present in the initial state. The overall timescale for runaway growth of the first core(s) is several times, 10^6 yr, even though previous studies have found a timescale of several times, 10^7 yr when starting with linear perturbations and similar physical parameters. Large-scale supersonic flows exist in the cloud and provide an observationally testable distinguishing characteristic from core formation due to linear initial perturbations. However, the nonlinear flows have decayed sufficiently that the relative infall motions onto the first core are subsonic, as in the case of starting from linear initial perturbations. The ion infall motions are very similar to those of neutrals; however, they lag the neutral infall in directions perpendicular to the mean magnetic field direction and lead the neutral infall in the direction parallel to the mean magnetic field.

Takahiro Kudoh; Shantanu Basu

2008-04-27T23:59:59.000Z

378

DYNAMICAL FRAGMENTATION OF THE T PYXIDIS NOVA SHELL DURING RECURRENT ERUPTIONS  

SciTech Connect (OSTI)

Hubble Space Telescope images of the ejecta surrounding the nova T Pyxidis resolve the emission into more than 2000 bright knots. We simulate the dynamical evolution of the ejecta from T Pyxidis during its multiple eruptions over the last 150 years using the adaptive mesh refinement code Ramses. We demonstrate that the observed knots are the result of Richtmyer-Meshkov gas dynamical instabilities (the equivalent of Rayleigh-Taylor instabilities in an accelerated medium). These instabilities are caused by the overrunning of the ejecta from the classical nova of 1866 by fast-moving ejecta from the six subsequent recurrent nova outbursts. Magnetic fields may play a role in determining knot scale and preventing their conductive evaporation. The model correctly predicts the observed expansion and dimming of the T Pyx ejecta as well as the knotty morphology. The model also predicts that deeper, high-resolution imagery will show filamentary structure connecting the knots. We show reprocessed Hubble Space Telescope imagery that shows the first hints of such a structure.

Toraskar, Jayashree; Mac Low, Mordecai-Mark; Shara, Michael M.; Zurek, David R., E-mail: toraskar@amnh.org, E-mail: mordecai@amnh.org, E-mail: mshara@amnh.org, E-mail: dzurek@amnh.org [Department of Astrophysics, American Museum of Natural History, 79th Street at Central Park West, New York, NY 10024-5192 (United States)

2013-05-01T23:59:59.000Z

379

From ground state to fission fragments: A complex, multi-dimensional multi-path problem  

SciTech Connect (OSTI)

Experimental results on the fission properties of nuclei close to {sup 264}Fm show sudden and large changes with a change of only one or two neutrons or protons. The nucleus {sup 258}Fm, for instance, undergoes symmetric fission with a half-life of about 0.4 ms and a kinetic-energy distribution peaked at about 235 MeV whereas {sup 256}Fm undergoes asymmetric fission with a half-life of about 3 h and a kinetic-energy distribution peaked at about 200 MeV. Qualitatively, these sudden changes have been postulated to be due to the emergence of fragment shells in symmetric-fission products close to {sup 132}Sn. Here we present a quantitative calculation that shows where high-kinetic-energy symmetric fusion occurs and why it is associated with a sudden and large decrease in fission half-lives. We base our study on calculations of potential-energy surfaces in the macroscopic-microscopic model and a semi-empirical model for the nuclear inertia. We use the three-quadratic-surface parameterization to generate the shapes for which the potential-energy surfaces are calculated. The use of this parameterization and the use of the finite-range macroscopic model allows for the study of two touching spheres and similar shapes. Since these shapes are thought to correspond to the scission shapes for the high-kinetic-energy events it is of crucial importance that a continuous sequence of shapes leading from the nuclear ground state to these configurations can be studied within the framework of the model. We present the results of the calculations in terms of potential-energy surfaces and fission half-lives for heavy even nuclei. The surfaces are displayed in the form of contour diagrams as functions of two moments of the shape. They clearly show the appearance of a second fission valley, which leads to scission configurations close to tow touching spheres, for fissioning systems in the vicinity of {sup 264}Fm.

Moeller, P. (Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan)); Nix, J.R. (Los Alamos National Lab., NM (United States)); Swiatecki, W.J. (Lawrence Berkeley Lab., CA (United States))

1992-01-01T23:59:59.000Z

380

From ground state to fission fragments: A complex, multi-dimensional multi-path problem  

SciTech Connect (OSTI)

Experimental results on the fission properties of nuclei close to {sup 264}Fm show sudden and large changes with a change of only one or two neutrons or protons. The nucleus {sup 258}Fm, for instance, undergoes symmetric fission with a half-life of about 0.4 ms and a kinetic-energy distribution peaked at about 235 MeV whereas {sup 256}Fm undergoes asymmetric fission with a half-life of about 3 h and a kinetic-energy distribution peaked at about 200 MeV. Qualitatively, these sudden changes have been postulated to be due to the emergence of fragment shells in symmetric-fission products close to {sup 132}Sn. Here we present a quantitative calculation that shows where high-kinetic-energy symmetric fusion occurs and why it is associated with a sudden and large decrease in fission half-lives. We base our study on calculations of potential-energy surfaces in the macroscopic-microscopic model and a semi-empirical model for the nuclear inertia. We use the three-quadratic-surface parameterization to generate the shapes for which the potential-energy surfaces are calculated. The use of this parameterization and the use of the finite-range macroscopic model allows for the study of two touching spheres and similar shapes. Since these shapes are thought to correspond to the scission shapes for the high-kinetic-energy events it is of crucial importance that a continuous sequence of shapes leading from the nuclear ground state to these configurations can be studied within the framework of the model. We present the results of the calculations in terms of potential-energy surfaces and fission half-lives for heavy even nuclei. The surfaces are displayed in the form of contour diagrams as functions of two moments of the shape. They clearly show the appearance of a second fission valley, which leads to scission configurations close to tow touching spheres, for fissioning systems in the vicinity of {sup 264}Fm.

Moeller, P. [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan); Nix, J.R. [Los Alamos National Lab., NM (United States); Swiatecki, W.J. [Lawrence Berkeley Lab., CA (United States)

1992-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

Lighting affects appearance LightSource emits photons  

E-Print Network [OSTI]

1 Lighting affects appearance #12;2 LightSource emits photons Photons travel in a straight line). And then some reach the eye/camera. #12;3 Basic fact: Light is linear Double intensity of sources, double photons reaching eye. Turn on two lights, and photons reaching eye are same as sum of number when each

Jacobs, David

382

Lighting affects appearance LightSource emits photons  

E-Print Network [OSTI]

1 Lighting affects appearance #12;2 LightSource emits photons Photons travel in a straight line). And then some reach the eye/camera. #12;3 Reflectance Model how objects reflect light. Model light sources Algorithms for computing Shading: computing intensities within polygons Determine what light strikes what

Jacobs, David

383

U.S. Agricultural Production Affected by Mexican Tariffs  

E-Print Network [OSTI]

U.S. Agricultural Production Affected by Mexican Tariffs CNAS Issue Brief 2011-02 March 17, 2011 was eliminated. Mexico retaliated on March 18, 2009 by imposing tariffs on selected U.S. agricultural exports and other goods including cosmetics, dental products and housewares. The tariffs were modified on September

384

QuestionQuestion How does nitrogen deposition affect roadside  

E-Print Network [OSTI]

al. 2004. Concentrations of ammonia and nitrogen dioxide at roadside verges, and their contributionQuestionQuestion How does nitrogen deposition affect roadside plant community composition? 1. Is there a gradient of nitrogen deposition to freeway verges from traffic exhaust? 2. Are there other sources of N

Hall, Sharon J.

385

Sex differences in affective and physiological responses to relationship orientations  

E-Print Network [OSTI]

. . . . . . . . ". . . . """ """" -""""" --""" ---" --" " Health Status Form. . Personal Attributes Questionnaire. . Goldberg's (1992) Five Factor Inventory. . Rosenberg's (1965) Self-Esteem Scale Self-Concept Affective Measure. . Manipulation Checks. . . . . , Physiological Measures. . Electromyographic.... . . . . APPENDIX 6 GOLDBERG'S (1992) FIVE FACTOR INVENTORY. . . . . . APPENDIX 7 MANIPULATION CHECK QUESTIONNAIRE. . . . . . . . . . . . VITA Page 34 . . . . 35 35 , . . . 35 35 37 37 37 43 . 43 . . . 43 . . . 44 47 . 51 51 . 53 55 . 64 65...

Hebl, Michelle Rae

2012-06-07T23:59:59.000Z

386

Collaborative Creativity: A Complex Systems Model with Distributed Affect  

E-Print Network [OSTI]

Collaborative Creativity: A Complex Systems Model with Distributed Affect Cecilia R. Aragon E16 2RD UK alisonwilliams62@googlemail.com ABSTRACT The study of creativity has received significant attention over the past century, with a recent increase in interest in collaborative, distributed creativity

Anderson, Richard

387

How Do Social Networks Affect Organizational Knowledge Utilization? David Dekker  

E-Print Network [OSTI]

How Do Social Networks Affect Organizational Knowledge Utilization? David Dekker University (cf. March, 1991). Organizational structures that coordinate this balance can be characterized-(0)24-361-1933 Email: d.dekker@nsm.kun.nl Key Words: Knowledge utilization, explorative and exploitative learning

Sadeh, Norman M.

388

Climate and Hydrological Factors Affecting Variation in Chlorophyll  

E-Print Network [OSTI]

in the region, accompanied by scant wastewater treatment. In contrast, water clarity increased significantlyClimate and Hydrological Factors Affecting Variation in Chlorophyll Concentration and Water Clarity organisms. In the Caribbean, changes in nutrient loading that result from rapid development are thought

Collin, Rachel

389

How ISO-Standards Affect Graphic-Arts Work  

E-Print Network [OSTI]

How ISO-Standards Affect Graphic-Arts Work Andreas Kraushaar Head, Prepress Division Fogra Munich, Germany 4pm, Wed., Jan. 10, 2007 Auditorium of the Center for Imaging Science ISO TC 130 (graphic. Important standards with respect to the printing industry such as the ISO 2846 and ISO 12647-X

Zanibbi, Richard

390

ORIGINAL PAPER Does wild boar rooting affect livestock grazing areas  

E-Print Network [OSTI]

ORIGINAL PAPER Does wild boar rooting affect livestock grazing areas in alpine grasslands? C the summer rangelands in the Spanish Central Pyrenees, where rooting by wild boar (Sus scrofa) is a large dis impact of wild boar rooting on Pyrenean grasslands. It quantified the extent of wild boar rooting

Paris-Sud XI, Université de

391

Policy Issues Affecting Spatial Data Infrastructure Developments in the Netherlands  

E-Print Network [OSTI]

Policy Issues Affecting Spatial Data Infrastructure Developments in the Netherlands Professor Bas C of Technology, the Netherlands Bas_Kok@euronet.nl Bastiaan van Loenen, PhD candidate department of civil engineering and geo-sciences, geodetic engineering Delft University of Technology, the Netherlands b

Onsrud, Harlan J.

392

Environmental Factors Affecting Tropical Cyclone Power Dissipation KERRY EMANUEL  

E-Print Network [OSTI]

- son 1974; Webster et al. 2005), and the Accumulated Cyclone Energy (ACE) index (Bell et al. 2000, the PDI is also accumulated over each year. Annually accumulated integral metrics such as ACE and PDI showEnvironmental Factors Affecting Tropical Cyclone Power Dissipation KERRY EMANUEL Program

Emanuel, Kerry A.

393

affecting recruitment dynamics: Topics by E-print Network  

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

affecting recruitment dynamics First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Dispersal, settlement...

394

affects population dynamics: Topics by E-print Network  

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

affects population dynamics First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Costs, benefits, and loss...

395

affect microtubule dynamics: Topics by E-print Network  

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

affect microtubule dynamics First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Polymorphic Dynamics of...

396

affecting clean coal: Topics by E-print Network  

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

affecting clean coal First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 CONSORTIUM FOR CLEAN COAL...

397

Factors affecting Iran`s future. Final report  

SciTech Connect (OSTI)

This study examines the factors affecting Iran`s future by focusing on the demographic, economic, and military trends in Iran and their impact on the country`s national security objectives in the next decade. The paper also assesses the implications of an economic embargo on Iran and potential Iranian threats to regional and United States national interests.

Sinai, J.

1993-05-28T23:59:59.000Z

398

affect intestinal absorption: Topics by E-print Network  

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

affect intestinal absorption First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Intestinal Absorption and...

399

THE USE OF VAPOR EXTRACTION SYSTEM AND ITS SUBSEQUENT REDUCTION OF WORKER EXPOSURE TO CARBON TETRACHLORIDE DURING RETRIEVAL OF HANFORDS LEGACY WASTE  

SciTech Connect (OSTI)

The Hanford Site is a decommissioned nuclear productions complex located in south eastern Washington and is operated by the Department of Energy (DOE). From 1955 to 1973, carbon tetrachloride (CCl{sub 4}), used in mixtures with other organic compounds, was used to recover plutonium from aqueous streams at Z Plant located on the Hanford Site. The aqueous and organic liquid waste that remained at the end of this process was discharged to soil columns in waste cribs located near Z Plant. Included in this waste slurry along with CCl{sub 4} were tributyl phosphate, dibutyl butyl phosphate, and lard oil. (Truex et al., 2001). In the mid 1980's, CCl{sub 4} was found in the unconfined aquifer below the 200 West Area and subsequent ground water monitoring indicated that the plume was widespread and that the concentrations were increasing. It has been estimated that approximately 750,000 kg (826.7 tons) of CCl{sub 4} was discharged to the soil from 1955 to 1973. (Truex et al., 2001). With initial concentration readings of approximately 30,000 parts per million by volume (ppmv) in one well field alone, soil vapor extraction began in 1992 in an effort to remove the CCl{sub 4} from the soil. (Rohay, 1999). Since 1992, approximately 78,607.6 kg (86.65 tons) of CCl{sub 4} have been extracted from the soil through the process of soil vapor extraction and 9,409.8 kg (10.37 tons) have been removed from the groundwater. (EPA, 2006). The success of this environmental cleanup process benefited not only the environment but also workers who were later involved in the retrieval of solid waste from trenches that were in or near the CCl{sub 4} plume. Solid waste was buried in trenches near Z Plant from 1967 to 1990. The solid waste, some of which was chemically and/or radioactively contaminated, was buried in trenches in steel or fiber drums, fiberboard boxes, fiberglass-reinforced plywood boxes, and steel, concrete, or wooden boxes. Much of this waste was buried with the intention of retrieving it later for permanent disposal and storage. Removal of this solid waste would disturb the soil that was potentially contaminated with CC4 and thereby pose a risk to workers involved in the retrieval effort. However, with the success of the VES, worker exposure did not occur.

PITTS DA

2008-03-18T23:59:59.000Z

400

Scaling violations of quark and gluon jet fragmentation functions in $e^{+}e{-}$ annihilations at $\\sqrt{s}$ = 91.2 and 183-209 GeV  

E-Print Network [OSTI]

Flavour inclusive, udsc and b fragmentation functions in unbiased jets, and flavour inclusive, udsc, b and gluon fragmentation functions in biased jets are measured in e+e- annihilations from data collected at centre-of-mass energies of 91.2, and 183-209 GeV with the OPAL detector at LEP. The unbiased jets are defined by hemispheres of inclusive hadronic events, while the biased jet measurements are based on three-jet events selected with jet algorithms. Several methods are employed to extract the fragmentation functions over a wide range of scales. Possible biases are studied in the results are obtained. The fragmentation functions are compared to results from lower energy e+e- experiments and with earlier LEP measurements and are found to be consistent. Scaling violations are observed and are found to be stronger for the fragmentation functions of gluon jets than for those of quarks. The measured fragmentation functions are compared to three recent theoretical next-to-leading order calculations and to the p...

Abbiendi, G; Ĺkesson, P F; Alexander, G; Allison, J; Amaral, P; Anagnostou, G; Anderson, K J; Asai, S; Axen, D A; Azuelos, Georges; Bailey, I; Barberio, E; Barillari, T; Barlow, R J; Batley, J Richard; Bechtle, P; Behnke, T; Bell, K W; Bell, P J; Bella, G; Bellerive, A; Benelli, G; Bethke, Siegfried; Biebel, O; Boeriu, O; Bock, P; Boutemeur, M; Braibant, S; Brigliadori, L; Brown, R M; Büsser, K; Burckhart, H J; Campana, S; Carnegie, R K; Carter, A A; Carter, J R; Chang, C Y; Charlton, D G; Ciocca, C; Csilling, Akos; Cuffiani, M; Dado, S; de Roeck, A; De Wolf, E A; Desch, Klaus; Dienes, B; Donkers, M; Dubbert, J; Duchovni, E; Duckeck, G; Duerdoth, I P; Etzion, E; Fabbri, Franco Luigi; Feld, L; Ferrari, P; Fiedler, F; Fleck, I; Ford, M; Frey, A; Gagnon, P; Gary, J W; Gaycken, G; Geich-Gimbel, C; Giacomelli, G; Giacomelli, P; Giunta, M; Goldberg, J; Gross, E; Grunhaus, Jacob; Gruwé, M; Günther, P O; Sen-Gupta, A; Hajdu, C; Hamann, M; Hanson, G G; Harel, A; Hauschild, M; Hawkes, C M; Hawkings, R; Hemingway, Richard J; Herten, G; Heuer, R D; Hill, J C; Hoffman, K; Horváth, D; Igo-Kemenes, P; Ishii, K; Jeremie, H; Jovanovic, P; Junk, T R; Kanaya, N; Kanzaki, J; Karlen, Dean A; Kawagoe, K; Kawamoto, T; Keeler, Richard K; Kellogg, R G; Kennedy, B W; Kluth, S; Kobayashi, T; Kobel, M; Komamiya, S; Kramer, T; Krieger, P; Von Krogh, J; Krüger, K; Kühl, T; Kupper, M; Lafferty, G D; Landsman, Hagar Yaël; Lanske, D; Layter, J G; Lellouch, D; Letts, J; Levinson, L; Lillich, J; Lloyd, S L; Loebinger, F K; Lü, J; Ludwig, A; Ludwig, J; Mader, W; Marcellini, S; Martin, A J; Masetti, G; Mashimo, T; Mättig, P; McKenna, J A; McPherson, R A; Meijers, F; Menges, W; Merritt, F S; Mes, H; Meyer, N; Michelini, Aldo; Mihara, S; Mikenberg, G; Miller, D J; Moed, S; Mohr, W; Mori, T; Mutter, A; Nagai, K; Nakamura, I; Nanjo, H; Neal, H A; Nisius, R; O'Neale, S W; Oh, A; Oreglia, M J; Orito, S; Pahl, C; Pásztor, G; Pater, J R; Pilcher, J E; Pinfold, J L; Plane, D E; Poli, B; Pooth, O; Przybycien, M B; Quadt, A; Rabbertz, K; Rembser, C; Renkel, P; Roney, J M; Rozen, Y; Runge, K; Sachs, K; Saeki, T; Sarkisyan-Grinbaum, E; Schaile, A D; Schaile, O; Scharff-Hansen, P; Schieck, J; Schörner-Sadenius, T; Schröder, M; Schumacher, M; Scott, W G; Seuster, R; Shears, T G; Shen, B C; Sherwood, P; Skuja, A; Smith, A M; Sobie, R J; Söldner-Rembold, S; Spanó, F; Stahl, A; Strom, D; Ströhmer, R; Tarem, S; Tasevsky, M; Teuscher, R; Thomson, M A; Torrence, E; Toya, D; Tran, P; Trigger, I; Trócsányi, Z L; Tsur, E; Turner-Watson, M F; Ueda, I; Ujvári, B; Vollmer, C F; Vannerem, P; Vertesi, R; Verzocchi, M; Voss, H; Vossebeld, Joost Herman; Ward, C P; Ward, D R; Watkins, P M; Watson, A T; Watson, N K; Wells, P S; Wengler, T; Wermes, N; Wilson, G W; Wilson, J A; Wolf, G; Wyatt, T R; Yamashita, S; Zer-Zion, D; Zivkovic, L

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

PUBLISHED ONLINE: 20 JULY 2009 | DOI: 10.1038/NPHYS1340 Single-drop fragmentation determines size  

E-Print Network [OSTI]

measurements exploiting rain's radar echo reflectivity6,7 . If the interpretations of this law are diverse, its at the ground level are believed to result from a complex mutual interaction with their neighbours. We show of the individual drops, both in the same and different rainfalls'. Indeed, subsequent measurements by Laws

Loss, Daniel

402

Factors affecting hydrolysis of condensed phosphates in soils  

E-Print Network [OSTI]

PP was added to all samples, with the samples subsequently being incubated at 25C . Samples were again extracted and analyzed at 2, 6, 18, and 36 days. Phosphorous was extracted from all samples by the method of Gilliam and Sample (1968... Temperature 5 C 25 C 35 C Time 0 Days 2 Days 6 Days 18 Days 36 Days ppm 1. 8 a -1. 8 b 4. 3 a -4. 3 b 6. 8 a -2. 7 b -4. 1 b 4. 2 -2. 5 b -1. 7 b 1. 8 a -0. 8 b -1. 0 b o. o a O. 4 a O. s a -o. e a -0. 3 a t Means within a factor...

Stewart, William M.

1983-01-01T23:59:59.000Z

403

Towards a Learning Companion that Recognizes Affect Ashish Kapoor, Selene Mota, Rosalind W. Picard  

E-Print Network [OSTI]

demand often involves failure and a host of associated affective responses. These affective responses can MIT Media Lab 20 Ames Street Cambridge, Massachusetts 02139 {ash, atenea, picard responses. This article describes techniques and tools being developed to recognize affective states

404

Who is Exposed to Gas Prices? How Gasoline Prices Affect Automobile Manufacturers and Dealerships  

E-Print Network [OSTI]

Who is Exposed to Gas Prices? How Gasoline Prices Affect Automobile Manufacturers and Dealerships Prices Affect Automobile Manufacturers and Dealerships Abstract Many consumers are keenly aware, by contrast, we investigate how gasoline prices affect the automobile industry: manufacturers and dealerships

Rothman, Daniel

405

The quantum walk search algorithm: Factors affecting efficiency  

E-Print Network [OSTI]

We numerically study the quantum walk search algorithm of Shenvi, Kempe and Whaley [PRA \\textbf{67} 052307] and the factors which affect its efficiency in finding an individual state from an unsorted set. Previous work has focused purely on the effects of the dimensionality of the dataset to be searched. Here, we consider the effects of interpolating between dimensions, connectivity of the dataset, and the possibility of disorder in the underlying substrate: all these factors affect the efficiency of the search algorithm. We show that, as well as the strong dependence on the spatial dimension of the structure to be searched, there are also secondary dependencies on the connectivity and symmetry of the lattice, with greater connectivity providing a more efficient algorithm. In addition, we also show that the algorithm can tolerate a non-trivial level of disorder in the underlying substrate.

Neil B. Lovett; Matthew Everitt; Robert M. Heath; Viv Kendon

2011-10-21T23:59:59.000Z

406

Influence of Heteroanion and Ammonium Cation Size on the Composition and Gas-Phase Fragmentation of Polyoxovanadates  

SciTech Connect (OSTI)

This paper describes the results of a systematic experimental investigation of the influence of different size cationic ammonium ligands and heteroanions on the composition, ionic charge state and gas-phase fragmentation pathways of anionic polyoxovanadates synthesized in solution. Four separate solutions of olyoxometalates (POMs) were prepared using all possible combinations of the tetraethylammonium [(C2H5)4N+] ligand, chloride (Cl-) heteroanion, tetrabutylammonium [(C4H9)4N+] ligand and acetate (CH3CO2-) heteroanion. Employing electrospray ionization combined with high-resolution mass spectrometry (ESI-MS) we demonstrate that POM solutions synthesized using the small [(C2H5)4N+] ligand and Cl-heteroanion are composed predominately of large doubly and triply charged chlorine containing clusters with a size distribution centered at fourteen vanadium atoms. POM solutions prepared using the Cl- anion and [(C4H9)4N+] ligand are shown to contain slightly larger clusters with fifteen and sixteen vanadium atoms, thereby indicating that the size of the cationic ammonium ligand exerts only a weak influence on the polymerization of polyoxovanadates. POM solutions prepared using (C2H5)4NCl and (C4H9)4NCl also produced peaks consistent with the attachment of one and two ammonium cations to the larger clusters. Solutions prepared using the large CH3CO2 - heteroanion, in contrast, are demonstrated to contain much smaller singly and doubly *Manuscript Click here to view linked References 2 charged clusters with a size distribution centered at six vanadium atoms. In addition, while incorporation of one and two ammonium ligands into the smaller clusters was observed, no POMs containing the CH3CO2 - heteroanion were identified. The gas-phase fragmentation pathways of representative POMs containing one and two ammonium ligands were examined using collision induced dissociation (CID) and mass spectrometry. Similar primary fragmentation pathways involving partial loss of a ligand -[(CxHy)3N+ x = 2,4; y = 5,9] were observed for clusters containing both one and two ligands largely independent of the size, composition and charge state of the precursor ion. The [(C4H9)4N+] ligand was found to exhibit stronger interactions with the core of the POMs resulting in higher abundances of fragment ions containing (C4H9) units compared to (C2H5) units from [(C2H5)4N+]. These results provide fundamental insight into the interactions between anionic metal oxide clusters, heteroanions and cationic ammonium ligands that are responsible for the size and composition controlled synthesis of POMs in solution.

Johnson, Grant E.; Al Hasan, Naila M.; Laskin, Julia

2013-11-15T23:59:59.000Z

407

Negative heat capacity in the critical region of nuclear fragmentation: an experimental evidence of the liquid-gas phase transition  

E-Print Network [OSTI]

An experimental indication of negative heat capacity in excited nuclear systems is inferred from the event by event study of energy fluctuations in $Au$ quasi-projectile sources formed in $Au+Au$ collisions at 35 A.MeV. The excited source configuration is reconstructed through a calorimetric analysis of its de-excitation products. Fragment partitions show signs of a critical behavior at about 5 A.MeV excitation energy. In the same energy range the heat capacity shows a negative branch providing a direct evidence of a first order liquid gas phase transition.

M. D'Agostino; F. Gulminelli; Ph. Chomaz; M. Bruno; F. Cannata; R. Bougault; N. Colonna; F. Gramegna; I. Iori; N. Le Neindre; G. V. Margagliotti; P. F. Mastinu; P. M. Milazzo; A. Moroni; G. Vannini

1999-06-07T23:59:59.000Z

408

Position reconstruction in fission fragment detection using the low pressure MWPC technique for the JLab experiment E02-017  

SciTech Connect (OSTI)

When a lambda hyperon was embedded in a nucleus, it can form a hypernucleus. The lifetime and its mass dependence of stable hypernuclei provide information about the weak decay of lambda hyperon inside nuclear medium. This work will introduce the Jefferson Lab experiment (E02-017) which aims to study the lifetime of the heavy hypernuclei using a specially developed fission fragment detection technique, a multi-wire proportional chamber operated under low gas pressure (LPMWPC). Presented here are the method and performance of the reconstruction of fission position on the target foil, the separation of target materials at different regions and the comparison and verification with the Mote Carlo simulation.

Xi-Yu, Qiu [Lanzhou U.; Tang, Liguang [JLAB; Margaryan, Amur T. [Yerevan; Jin-Zhang, Xu [Lanzhou; Bi-Tao, Hu [Lanzhou; Xi-Meng, Chen [Lanzhou

2014-07-01T23:59:59.000Z

409

On the simulation of enzymatic digest patterns: the fragmentation of oligomeric and polymeric galacturonides by endo-polygalacturonase II  

E-Print Network [OSTI]

A simulation methodology for predicting the time-course of enzymatic digestions is described. The model is based solely on the enzyme's subsite architecture and concomitant binding energies. This allows subsite binding energies to be used to predict the evolution of the relative amounts of different products during the digestion of arbitrary mixtures of oligomeric or polymeric substrates. The methodology has been specifically demonstrated by studying the fragmentation of a population of oligogalacturonides of varying degrees of polymerization, when digested by endo-polygalacturonase II (endo-PG II) from Aspergillus niger.

Hunt, J J; Williams, M A K; Hunt, Jonathan J; Cameron, Randall G; Williams, Martin A.K.

2006-01-01T23:59:59.000Z

410

Characterization of Carbon- and Nitrogen-Rich Particle Fragments Captured from Comet 81P/Wild 2  

SciTech Connect (OSTI)

We studied three Stardust fragments with infrared spectroscopy to characterize organic matter; with synchrotron-induced X-ray fluorescence to determine Fe contents and certain elemental ratios to iron; with scanning electron microscopy (SEM) to image sample morphology and to detect semiquantitatively Mg, Al, Si, Ca, and Fe; and with nuclear reaction analysis (NRA) to measure C, N, O, and Si. A fourth fragment was analyzed by SEM only. Fragment C2054,0,35,21 from track 35 (hereafter C21) is extremely rich in C and contains appreciable concentrations of Mg, Al, and Ca, but little Fe. Fragments C2054,0,35,23 (C23), C2044,0,41 (C41), and C2054,0,35,51,0 (C51), from tracks 35, 41, and 35, respectively, consist largely but not exclusively of aerogel. C23 contains Mg and finely dispersed S, but little Al, Ca or Fe. Pooled CI-normalized elemental ratios for C21, C23, and C41 are as follows: Ti/Fe, 5.0; Cr/Fe, 0.84; Mn/Fe, 0.97; Ni/Fe, 2.4; and Zn/Fe, 31. The enrichments in Ti and Zn may be related to the presence of aerogel. Minimum weight percentages of C and N estimated without correcting for the presence of aerogel are 30 and 0.7 for C21; 2.8 and 0.2 for C23; 1.2 and 0.14 for C41. After corrections for the presence of aerogel containing 1.4 wt% C and 0.02 wt% N, the corresponding results are 37 and 0.85 for C21; and 10 and 1 for C23; and {approx}1 and {approx}1, for C41 (The results for C41 have large uncertainties). These weight percentages are larger than or comparable to values for carbonaceous meteorites. C/N atomic ratios without/without aerogel corrections are 51/51 for C21, 17/11 for C23, and 10/{approx}1 for C41. Within the uncertainties these values are within the range for carbonaceous meteorites.

Gallien,J.; Khodja, H.; Herzog, G.; Taylor, S.; Koepsell, E.; Daghlian, C.; Flynn, G.; Sitnitsky, I.; Lanzirotti, A.; Sutton, S.

2008-01-01T23:59:59.000Z

411

Leisure constraints which affect continued nonresident hunter participation  

E-Print Network [OSTI]

thesis research. I am grateful for their time, patience, and good humor. I would like to thank McAllister Maxwell, William Cook, Sara Steen, and Kelly Strnadel for their help preparing survey mailouts, offering advice, and continued support. Jason... not significantly different in the constraints they felt affected their hunting participation. Both groups listed no time due to family or work commitments, high lease cost, and distance as their greatest constraints to hunting in Texas. No significant...

Cook, Kathrine Helen

1994-01-01T23:59:59.000Z

412

Natural Attenuation of Zinc Pollution in Smelter-Affected Soil  

E-Print Network [OSTI]

Natural Attenuation of Zinc Pollution in Smelter-Affected Soil M . V E S P A , M . L A N S O N structural character- ization of the two types of Zn-containing phyllosilicate in slightly basic smelter to the smelter and wind direction, is ferruginous with an average Fe/Al atomic ratio of 1.1 ( 0.5. The Zn2

413

Utility & Regulatory Factors Affecting Cogeneration & Independent Power Plant Design & Operation  

E-Print Network [OSTI]

UTILITY & REGULATORY FACTORS AFFECTiNG COGENERATION & INDEPENDENT POWER PLANT DESIGN & OPERATION Richard P. Felak General Electric Company Schenectady, New York ABSTRACT In specifying a cogeneration or independent power plant, the owner... should be especially aware of the influences which electric utilities and regulatory bodies will have on key parameters such as size, efficiency, design. reliability/ availabilitY, operating capabilities and modes, etc. This paper will note examples...

Felak, R. P.

414

Factors affecting color stability of vinegar pickled meat products  

E-Print Network [OSTI]

150 ppm nitrite and 600 ppm erythorbate. Visual color scores decreased (P& . 05) with increasing storage intervals. pH values were signifi- cantly (P &. 05) affected by color additive, vinegar strength, nitrite level, erythorbate level and storage... interval. Higher nitrite levels (150 ppm) and higher erythorbate levels (600 ppm) resulted in higher (P&. 05) pH values than did lower levels of these ingredients. With increased storage time, pH values increased and were significantly (p &. 05...

Ploch, Carol Ann

1978-01-01T23:59:59.000Z

415

E-Print Network 3.0 - affected sib-pair families Sample Search...  

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

pairs into two diagnostic categories: "narrow" when both affected sibs had autism, and "broad... the distribution of affected ... Source: Ecole Polytechnique, Centre de...

416

E-Print Network 3.0 - arrangements affecting sex Sample Search...  

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

David John Allsop Summary: 10 affected by many factors. These can be summarised into two broad categories. First, sex biased... 1967). Second, when environmental conditions affect...

417

E-Print Network 3.0 - affecting lateral suboccipital Sample Search...  

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

like corn, soybeans, alfalfa? Would Summary: 1 Crops Would the heat of an oil pipeline buried 4 feet underground affect ground or surface water... be affected? Response by...

418

E-Print Network 3.0 - affect Sample Search Results  

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

like corn, soybeans, alfalfa? Would Summary: 1 Crops Would the heat of an oil pipeline buried 4 feet underground affect ground or surface water... be affected? Response by...

419

E-Print Network 3.0 - affecting species diversity Sample Search...  

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

search results for: affecting species diversity Page: << < 1 2 3 4 5 > >> 1 Community Ecology & Species Assemblages Summary: affect species distributions Tropical regions - most...

420

E-Print Network 3.0 - affects plant growth Sample Search Results  

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

of an oil pipeline buried 4 feet underground affect ground or surface water... be affected? Response by Professor Timothy Arkebauer - In most cropland situations in Nebraska...

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


421

E-Print Network 3.0 - affects photosynthetic nitrogen Sample...  

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

Ecology 1998 The significance of differences in the mechanisms of Summary: primarily affected volume of tissue per unit area whereas nitrogen supply primarily affected...

422

E-Print Network 3.0 - affects leaf properties Sample Search Results  

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

finishes expanding (Dale and Milthorpe 1983). The eventual size of the leaf is also affected... also been shown to significantly affect the ... Source: Moles, Angela - School of...

423

E-Print Network 3.0 - affecting plant growth Sample Search Results  

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

of an oil pipeline buried 4 feet underground affect ground or surface water... be affected? Response by Professor Timothy Arkebauer - In most cropland situations in Nebraska...

424

E-Print Network 3.0 - addition affects leaf Sample Search Results  

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

leaf rot. Eventually, entire plants will easily pull off the stolons. Roots are not affected... Turfgrasses Affected All warm-season turfgrasses, especially St. Augustinegrass...

425

E-Print Network 3.0 - affecting early enzymatic Sample Search...  

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

Institute of Technology, Delhi Collection: Biotechnology ; Biology and Medicine 5 Lignin content in natural Populus variants affects sugar release Summary: affects enzymatic...

426

E-Print Network 3.0 - attribute affects perception Sample Search...  

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

IN TONE DEAFNESS' Summary: of pitch perception are affected in individuals with congenital amusia. Levels considered are: 1... detection will adversely affect the perception...

427

Dynamical description of the moments of the energy distribution of fission fragments and scission of a fissile nucleus  

SciTech Connect (OSTI)

A multidimensional stochastic approach to fission dynamics on the basis of three-dimensional Langevin equations is applied systematically to calculating the first four moments of the energy distribution of fission fragments over a broad range of Coulomb parameter values (700 < Z{sup 2}/A{sup 1/3} < 1700). For the scission of a fissile nucleus into fragments, use was made of various criteria traditional in modern fission theory: the vanishing of the neck radius at the scission instant and the equality of the neck radius to about 0.3R{sub 0} at this instant. In calculating the energy distribution, both of the criteria used lead to a fairly good description of experimental data on the first two moments and to a satisfactory description of data on the third and fourth moments of the distribution. However, the quality of the description of available experimental data is insufficiently good for giving preference to any of these criteria. Within three-dimensional Langevin dynamics, it is shown that the vanishing-radius criterion leads to unexpectably good agreement with experimental data on the first four moments of the energy distribution. A modified version of one-body dissipation where the coefficient that takes into account the reduction of the wall-formula contribution was set to k{sub s} = 0.25 was used in the calculations.

Borunov, M. V., E-mail: bmv@opsb.ru; Nadtochy, P. N.; Adeev, G. D. [Omsk State University (Russian Federation)

2007-11-15T23:59:59.000Z

428

Electrospray mass spectrometry of NeuAc oligomers associated with the C fragment of the tetanus toxin  

SciTech Connect (OSTI)

The Clostridial neurotoxins, botulinum and tetanus, gain entry into neuronal cells by protein recognition involving cell specific binding sites. The sialic or N-acetylneuraminic acid (NeuAc) residues of gangliosides attached to the surface of motor neurons are the suspected recognition and interaction points with Clostridial neurotoxins, although not necessarily the only ones. We have used electrospray ionization mass spectrometry (ESIMS) to examine formation of complexes between the tetanus toxin C fragment, or targeting domain, and carbohydrates containing NeuAc groups to determine how NeuAc residues contribute to ganglioside binding. ESI-MS was used to rapidly and efficiently measure dissociation constants for a number of related NeuAc-containing carbohydrates and NeuAc oligomers, information that has helped identify the structural features of gangliosides that determine their binding to tetanus toxin. The strength of the interactions between the C fragment and (NeuAc){sub n}, are consistent with the topography of the targeting domain of tetanus toxin and the nature of its carbohydrate binding sites. The results suggest that the targeting domain of tetanus toxin contains two binding sites that can accommodate NeuAc (or a dimer). This study also shows that NeuAc must play an important role in ganglioside binding and molecular recognition, a process critical for normal cell function and one frequently exploited by toxins, bacteria and viruses to facilitate their entrance into cells.

Prieto, M C; Whittal, R M; Baldwin, M A; Burlingame, A L; Balhorn, R

2005-04-03T23:59:59.000Z

429

FRAGMENTATION AND EVOLUTION OF MOLECULAR CLOUDS. II. THE EFFECT OF DUST HEATING  

SciTech Connect (OSTI)

We investigate the effect of heating by luminosity sources in a simulation of clustered star formation. Our heating method involves a simplified continuum radiative transfer method that calculates the dust temperature. The gas temperature is set by the dust temperature. We present the results of four simulations; two simulations assume an isothermal equation of state and the two other simulations include dust heating. We investigate two mass regimes, i.e., 84 M{sub sun} and 671 M{sub sun}, using these two different energetics algorithms. The mass functions for the isothermal simulations and simulations that include dust heating are drastically different. In the isothermal simulation, we do not form any objects with masses above 1 M{sub sun}. However, the simulation with dust heating, while missing some of the low-mass objects, forms high-mass objects ({approx}20 M{sub sun}) which have a distribution similar to the Salpeter initial mass function. The envelope density profiles around the stars formed in our simulation match observed values around isolated, low-mass star-forming cores. We find the accretion rates to be highly variable and, on average, increasing with final stellar mass. By including radiative feedback from stars in a cluster-scale simulation, we have determined that it is a very important effect which drastically affects the mass function and yields important insights into the formation of massive stars.

Urban, Andrea; Evans, Neal J. [Department of Astronomy, University of Texas, Austin, TX 78712 (United States); Martel, Hugo [Departement de Physique, genie physique et optique, Universite Laval, Quebec, QC G1K 7P4 (Canada)

2010-02-20T23:59:59.000Z

430

Legal and regulatory issues affecting aquifer thermal energy storage  

SciTech Connect (OSTI)

This document updates and expands the report with a similar title issued in October 1980. This document examines a number of legal and regulatory issues that potentially can affect implementation of the aquifer thermal energy storage (ATES) concept. This concept involves the storage of thermal energy in an underground aquifer until a later date when it can be effectively utilized. Either heat energy or chill can be stored. Potential end uses of the energy include district space heating and cooling, industrial process applications, and use in agriculture or aquaculture. Issues are examined in four categories: regulatory requirements, property rights, potential liability, and issues related to heat or chill delivery.

Hendrickson, P.L.

1981-10-01T23:59:59.000Z

431

Review of Various Reaction Parameters and Other Factors Affecting on Production of Chicken Fat  

E-Print Network [OSTI]

production of chicken fat biodiesel. These are following reaction parameters which affect the production of

Jagadale S. S; Jugulkar L. M

432

Can coyotes affect deer populations in Southeastern North America?  

SciTech Connect (OSTI)

ABSTRACT The coyote (Canis latrans) is a recent addition to the fauna of eastern North America, and in many areas coyote populations have been established for only a decade or two. Although coyotes are known predators of white-tailed deer (Odocoileus virginianus) in their historic range, effects this new predator may have on eastern deer populations have received little attention. We speculated that in the southeastern United States, coyotes may be affecting deer recruitment, and we present 5 lines of evidence that suggest this possibility. First, the statewide deer population in South Carolina has declined coincident with the establishment and increase in the coyote population. Second, data sets from the Savannah River Site (SRS) in South Carolina indicate a new mortality source affecting the deer population concurrent with the increase in coyotes. Third, an index of deer recruitment at SRS declined during the period of increase in coyotes. Fourth, food habits data from SRS indicate that fawns are an important food item for coyotes during summer. Finally, recent research from Alabama documented significant coyote predation on fawns there. Although this evidence does not establish cause and effect between coyotes and observed declines in deer recruitment, we argue that additional research should proactively address this topic in the region. We identified several important questions on the nature of the deer–coyote relationship in the East.

Kilgo, J., C.; Ray, H., Scott; Ruth, Charles; Miller, Karl, V.

2010-07-01T23:59:59.000Z

433

Microbial Carbon Cycling in Permafrost-Affected Soils  

SciTech Connect (OSTI)

The Arctic plays a key role in Earth s climate system as global warming is predicted to be most pronounced at high latitudes and because one third of the global carbon pool is stored in ecosystems of the northern latitudes. In order to improve our understanding of the present and future carbon dynamics in climate sensitive permafrost ecosystems, present studies concentrate on investigations of microbial controls of greenhouse gas fluxes, on the activity and structure of the involved microbial communities, and on their response to changing environmental conditions. Permafrost-affected soils can function as both a source and a sink for carbon dioxide and methane. Under anaerobic conditions, caused by flooding of the active layer and the effect of backwater above the permafrost table, the mineralization of organic matter can only be realized stepwise by specialized microorganisms. Important intermediates of the organic matter decomposition are hydrogen, carbon dioxide and acetate, which can be further reduced to methane by methanogenic archaea. Evolution of methane fluxes across the subsurface/atmosphere boundary will thereby strongly depend on the activity of anaerobic methanogenic archaea and obligately aerobic methane oxidizing proteobacteria, which are known to be abundant and to significantly reduce methane emissions in permafrost-affected soils. Therefore current studies on methane-cycling microorganisms are the object of particular attention in permafrost studies, because of their key role in the Arctic methane cycle and consequently of their significance for the global methane budget.

Vishnivetskaya, T. [University of Tennessee, Knoxville (UTK); Liebner, Susanne [University of Tromso, Norway; Wilhelm, Ronald [McGill University, Montreal, Quebec; Wagner, Dirk [Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany

2011-01-01T23:59:59.000Z

434

Transition from participant to spectator fragmentation in Au+Au reaction between 60 AMeV and 150 AMeV  

E-Print Network [OSTI]

Using the quantum molecular dynamics approach, we analyze the results of the recent INDRA Au+Au experiments at GSI in the energy range between 60 AMeV and 150 AMeV. It turns out that in this energy region the transition toward a participant-spectator scenario takes place. The large Au+Au system displays in the simulations as in the experiment simultaneously dynamical and statistical behavior which we analyze in detail: The composition of fragments close to midrapidity follows statistical laws and the system shows bi-modality, i.e. a sudden transition between different fragmentation pattern as a function of the centrality as expected for a phase transition. The fragment spectra at small and large rapidities, on the other hand, are determined by dynamics and the system as a whole does not come to equilibrium, an observation which is confirmed by FOPI experiments for the same system.

Zbiri, K; Aichelin, J; Reisdorf, W; Gulminelli, F; Lynen, U; Müller, W F J; Orth, H; Schwarz, C; Sfienti, C; Trautmann, W; Turzó, K; Zwieglinski, B; Auger, G; Charvet, J L; Chbihi, A; Dayras, R; Durand, D; Frankland, J D; Legrain, R; Le Neindre, N; López, O; Nalpas, L; Pârlog, M; Rivet, M F; Rosato, E; Vient, E; Vigilante, M; Volant, C; Wieleczko, J P

2006-01-01T23:59:59.000Z

435

On the Nature of the Response of the General Purpose Heat Source to the Impact of Large Solid Rocket Motor Casing Fragments  

SciTech Connect (OSTI)

After the Challenger (STS-51L)accident new tests were performed to assess the response of the GPHS module to large fragment impacts. The subject of this paper is the analytical process used to perform macro calibrations of the analytical methods and their application to predict the GPHS modules' response to serially increasing levels of test environment complexity. Sensitivity studies were performed to generate a fueled-clad-distortion-response statistical database for use in a Monte Carlo based fuel release analysis. The analyses showed that the iridium fueled clads in the GPHS-RTG have high resistance to distortion induced by the impact of large, high velocity (>200 m/s), SRM casing fragments. It was concluded that the impact of large SRM fragments will cause little clad disruption at early Mission Elapsed Time (MET), and that the effects of these impacts will be less severe than had initially been believe. There are three copies in the file.

Eck, Marshall B.; Mukunda, Meera

1989-01-01T23:59:59.000Z

436

Power law and exponential ejecta size distributions from the dynamic fragmentation of shock-loaded Cu and Sn metals under melt conditions  

SciTech Connect (OSTI)

Large scale molecular dynamics (MD) simulations are performed to study and to model the ejecta production from the dynamic fragmentation of shock-loaded metals under melt conditions. A generic 3D crystal in contact with vacuum containing about 10{sup 8} atoms and with a sinusoidal free surface roughness is shock loaded so as to undergo a solid-liquid phase change on shock. The reflection of the shock wave at the interface metal/vacuum gives rise to the ejection of 2D jets/sheets of atoms (Richtmyer-Meshkov instabilities in the continuum limit), which develop and break up, forming ejecta (fragments) of different volumes (or mass). The fragmentation process is investigated by analyzing the evolution of the resulting volume distribution of the ejecta as a function of time. Two metals are studied (Cu and Sn) and the amplitude of the roughness is varied. The simulations show that the associated distributions exhibit a generic behavior with the sum of two distinct terms of varying weight, following the expansion rate of the jets: in the small size limit, the distribution obeys a power law dependence with an exponent equal to 1.15?±?0.08; and in the large size limit, it obeys an exponential form. These two components are interpreted, with the help of additional simple simulations, as the signature of two different basic mechanisms of fragmentation. The power law dependence results from the fragmentation of a 2D network of ligaments arranged following a fractal (scale free) geometry and generated when the sheets of liquid metal expand and tear. The exponential distribution results from a 1D Poisson fragmentation process of the largest ligaments previously generated. Unlike the power law distribution, it is governed by a characteristic length scale, which may be provided by energy balance principle.

Durand, O.; Soulard, L. [CEA, DAM, DIF, F-91297 Arpajon (France)

2013-11-21T23:59:59.000Z

437

ISLAND OF THE HIGH YIELDS OF 252Cf(sf) COLLINEAR TRIPARTITION IN THE FRAGMENT MASS SPACE  

E-Print Network [OSTI]

Abstract. Results of three independent experiments aimed at searching for collinear cluster tripartition (CCT) of the 252Cf (sf) are reported. They confirm previously proposed kinematical scheme let to distinguish two CCT partners flying almost in the same direction. A new island of the CCT manifestation in the mass-mass distribution of the decay fragments was revealed. A total yield of the CCT originated events in the island is not less 4*10-3 per binary fission. Presumably, the ternary decay of nuclear molecules based on heavy magic clusters such as isotopes of Ni, Ge, Sn, Te gives rise to the effect observed. Key words: clustering, multibody decays, shell effects, fission 1.

Yu. V. Pyatkov; D. V. Kamanin; W. H. Trzaska; W. Von Oertzen; Yu. E. Peinionzhkevich

438

Multiplicity correlations of intermediate-mass fragments with pions and fast protons in $^{12}C + ^{197}Au$  

E-Print Network [OSTI]

Low-energy pi+ (E 150 MeV) with intermediate-mass fragments were determined from the measured coincidence data. The deduced correlation functions 1 + R \\approx 1.3 for inclusive event samples reflect the strong correlations evident from the common impact-parameter dependence of the considered multiplicities. For narrow impact-parameter bins (based on charged-particle multiplicity), the correlation functions are close to unity and do not indicate strong additional correlations. Only for pions at high particle multiplicities (central collisions) a weak anticorrelation is observed, probably due to a limited competition between these emissions. Overall, the results are consistent with the equilibrium assumption made in statistical multifragmentation scenarios. Predictions obtained with intranuclear cascade models coupled to the Statistical Multifragmentation Model are in good agreement with the experimental data.

Turzó, K; Begemann-Blaich, M L; Bellaize, N; Bittiger, R; Bocage, F; Borderie, B; Bougault, R; Bouriquet, B; Charvet, J L; Chbihi, A; Dayras, R; Durand, D; Frankland, J D; Galíchet, E; Gourio, D; Guinet, D; Hudan, S; Imme, G; Lautesse, P; Lavaud, F; Lefčvre, A; Legrain, R; López, O; Lukasik, J; Lynen, U; Müller, W F J; Nalpas, L; Orth, H; Plagnol, E; Raciti, G; Rosato, E; Saija, A; Schwarz, C; Seidel, W; Sfienti, C; Tamain, B; Trautmann, W; Trzcinski, A; Vient, E; Vigilante, M; Volant, C; Zwieglinski, B; Botvina, A S

2004-01-01T23:59:59.000Z

439

Velocity map imaging as a tool for gaining mechanistic insight from closed-loop control studies of molecular fragmentation  

SciTech Connect (OSTI)

Strong-field closed-loop control schemes using shaped ultrafast laser pulses have been used to selectively fragment a variety of molecules in recent years. The resulting pulses are often complex and resist an easy mechanistic interpretation. We report on the use of velocity map imaging to study the dissociative ionization of CO molecules by optimally-shaped ultrafast laser pulses. Using this technique, a mechanism is identified for the optimized CO{sup +} {yields} C + O{sup +} dissociation, and some of the observed control over the CO{sup +} dissociation branching ratio is ascribed to an angular discrimination effect. Furthermore, we demonstrate that the acquisition of two-dimensional velocity map images is rapid enough to incorporate directly into the adaptive control loop.

Jochim, Bethany; Averin, R.; Gregerson, Neal; Wells, E. [Department of Physics, Augustana College, Sioux Falls, South Dakota 57197 (United States); McKenna, J.; De, S.; Ray, D.; Zohrabi, M.; Carnes, K. D.; Ben-Itzhak, I. [J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506 (United States); Bergues, B. [Max Planck Institute of Quantum Optics, Hans-Kopfermann Strasse 1, D-85748 Garching (Germany); Kling, M. F. [J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506 (United States); Max Planck Institute of Quantum Optics, Hans-Kopfermann Strasse 1, D-85748 Garching (Germany)

2011-04-15T23:59:59.000Z

440

Growth of calcium-aluminum-rich inclusions by coagulation and fragmentation in a turbulent protoplanetary disk: observations and modelisation  

E-Print Network [OSTI]

Whereas it is generally accepted that calcium-aluminum-rich inclusions (CAIs) from chondritic meteorites formed in a hot environment in the solar protoplanetary disk, the conditions of their formation remain debated. Recent laboratory studies of CAIs have provided new kind of data: their size distributions. We show that size distributions of CAIs measured in laboratory from sections of carbonaceous chondrites have a power law size distribution with cumulative size exponent between -1.7 and -1.9, which translates into cumulative size exponent between -2.5 and -2.8 after correction for sectioning. To explain these observations, numerical simulations were run to explore the growth of CAIs from micrometer to centimeter sizes, in a hot and turbulent protoplanetary disk through the competition of coagulation and fragmentation. We show that the size distributions obtained in growth simulations are in agreement with CAIs size distributions in meteorites. We explain the CAI sharp cut-off of their size distribution at ...

Charnoz, S; Chaumard, N; Baillie, K; Tallifet, E

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

Fragmentation and Limits to Dynamical Scaling in Viscous Coarsening: An Interrupted in situ X-Ray Tomographic Study  

E-Print Network [OSTI]

X-Ray microtomography was used to follow the coarsening of the structure of a ternary silicate glass experiencing phase separation in the liquid state. The volumes, surfaces, mean and Gaussian curvatures of the domains of minority phase were measured after reconstruction of the 3D images and segmentation. A linear growth law of the characteristic length scale $\\ell \\sim t$ was observed. A detailed morphological study was performed. While dynamical scaling holds for most of the geometrical observables under study, a progressive departure from scaling invariance of the distributions of local curvatures was evidenced. The latter results from a gradual fragmentation of the structure in the less viscous phase that also leads to a power-law size distribution of isolated domains.

David Bouttes; Emmanuelle Gouillart; Elodie Boller; Davy Dalmas; Damien Vandembroucq

2014-09-04T23:59:59.000Z

442

A method based on transverse energy balance of jets for selection of direct photons and fragmentation photons in high energy pp collisions  

E-Print Network [OSTI]

Direct photons are important probes in high energy collisions. They play an important role in determining the parton distribution function directly inside a proton as well as the nature of the matter formed in heavy ion collisions. However fragmentation photons play the role of prominent background in identifying the direct photons. In the present work we developed a new method based on the transverse energy balance of jets for enrichment of direct photon candidates in pp collisions. This method can reject 35% of the background photons (fragmentation) which can not be suppressed by isolation. Efficiency of detection of direct photon decrease by 10% in the method.

Mriganka Mouli Mondal; Subhasis Chattopadhyay

2009-03-17T23:59:59.000Z

443

Verification of Monte Carlo transport codes against measured small angle p-, d-, and t-emission in carbon fragmentation at 600 MeV/nucleon  

E-Print Network [OSTI]

Momentum spectra of hydrogen isotopes have been measured at 3.5 deg from C12 fragmentation on a Be target. Momentum spectra cover both the region of fragmentation maximum and the cumulative region. Differential cross sections span five orders of magnitude. The data are compared to predictions of four Monte Carlo codes: QMD, LAQGSM, BC, and INCL++. There are large differences between the data and predictions of some models in the high momentum region. The INCL++ code gives the best and almost perfect description of the data.

B. M. Abramov; P. N. Alexeev; Yu. A. Borodin; S. A. Bulychjov; I. A. Dukhovskoy; A. P. Krutenkova; V. V. Kulikov; M. A. Martemianov; M. A. Matsyuk; E. N. Turdakina; A. I. Khanov; S. G. Mashnik

2015-02-05T23:59:59.000Z

444

Verification of Monte Carlo transport codes against measured small angle p-, d-, and t-emission in carbon fragmentation at 600 MeV/nucleon  

E-Print Network [OSTI]

Momentum spectra of hydrogen isotopes have been measured at 3.5 deg from C12 fragmentation on a Be target. Momentum spectra cover both the region of fragmentation maximum and the cumulative region. Differential cross sections span five orders of magnitude. The data are compared to predictions of four Monte Carlo codes: QMD, LAQGSM, BC, and INCL++. There are large differences between the data and predictions of some models in the high momentum region. The INCL++ code gives the best and almost perfect description of the data.

Abramov, B M; Borodin, Yu A; Bulychjov, S A; Dukhovskoy, I A; Krutenkova, A P; Kulikov, V V; Martemianov, M A; Matsyuk, M A; Turdakina, E N; Khanov, A I; Mashnik, S G

2015-01-01T23:59:59.000Z

445

Efficient implementation of the three-dimensional reference interaction site model method in the fragment molecular orbital method  

SciTech Connect (OSTI)

The three-dimensional reference interaction site model (3D-RISM) method was efficiently implemented in the fragment molecular orbital (FMO) method. The method is referred to as the FMO/3D-RISM method, and allows us to treat electronic structure of the whole of a macromolecule, such as a protein, as well as the solvent distribution around a solute macromolecule. The formalism of the FMO/3D-RISM method, for the computationally available form and variational expressions, are proposed in detail. A major concern leading to the implementation of the method was decreasing the computational costs involved in calculating the electrostatic potential, because the electrostatic potential is calculated on numerous grid points in three-dimensional real space in the 3D-RISM method. In this article, we propose a procedure for decreasing the computational costs involved in calculating the electrostatic potential in the FMO method framework. The strategy involved in this procedure is to evaluate the electrostatic potential and the solvated Fock matrix in different manners, depending on the distance between the solute and the solvent. The electrostatic potential is evaluated directly in the vicinity of the solute molecule by integrating the molecular orbitals of monomer fragments of the solute molecule, whereas the electrostatic potential is described as the sum of multipole interactions when an analog of the fast multipole method is used. The efficiency of our method was demonstrated by applying it to a water trimer system and three biomolecular systems. The FMO/3D-RISM calculation can be performed within a reasonable computational time, retaining the accuracy of some physical properties.

Yoshida, Norio, E-mail: noriwo@chem.kyushu-univ.jp [Department of Chemistry, Graduate School of Sciences, Kyushu University, 6-10-1, Hakozaki, Higashi-ku, Fukuoka 812-8581 (Japan)

2014-06-07T23:59:59.000Z

446

Study of parameters affecting enhanced coal bed methane  

SciTech Connect (OSTI)

Laboratory and field scale trials conducted so far indicate that injection of CO{sub 2} and N{sub 2} into deep coalbeds has the potential to enhance coalbed methane (ECBM) recovery while simultaneously sequestering CO{sub 2}. The work has identified that the fundamental processes involved in CO{sub 2} sequestration/CBM recovery in deep coalbeds are not fully understood and further research is needed to advance this technology. ECBM is affected by several parameters; prominent among them are coal characteristics, in-situ conditions prevailing in deep coalbeds, and changes arising from the interaction of coal with various fluids. These parameters do not act independently, thereby making it difficult to isolate their impacts separately. An attempt has been made in this article to classify these parameters and understand their role in ECBM. Past work in this area is reviewed and the future work that is critical for an improved understanding of ECBM recovery is discussed.

Katyal, S.; Valix, M.; Thambimuthu, K. [University of Sydney, Sydney, NSW (Australia). Dept. of Chemical Engineering

2007-02-15T23:59:59.000Z

447

Regulatory requirements affecting disposal of asbestos-containing waste  

SciTech Connect (OSTI)

Many U.S. Department of Energy (DOE) facilities are undergoing decontamination and decommissioning (D&D) activities. The performance of these activities may generate asbestos-containing waste because asbestos was formerly used in many building materials, including floor tile, sealants, plastics, cement pipe, cement sheets, insulating boards, and insulating cements. The regulatory requirements governing the disposal of these wastes depend on: (1) the percentage of asbestos in the waste and whether the waste is friable (easily crumbled or pulverized); (2) other physical and chemical characteristics of the waste; and (3) the State in which the waste is generated. This Information Brief provides an overview of the environment regulatory requirements affecting disposal of asbestos-containing waste. It does not address regulatory requirements applicable to worker protection promulgated under the Occupational Safety and Health Act (OSHAct), the Mining Safety and Health Act (MSHA), or the Toxic Substances Control Act (TSCA).

NONE

1995-11-01T23:59:59.000Z

448

Microscale Confinement features in microfluidic devices can affect biofilm  

SciTech Connect (OSTI)

Biofilms are aggregations of microbes that are encased by extra-cellular polymeric substances (EPS) and adhere to surfaces and interfaces. Biofilm development on abiotic surfaces is a dynamic process, which typically proceeds through an initial phase of adhesion of plankntonic microbes to the substrate, followed by events such as growth, maturation and EPS secretion. However, the coupling of hydrodynamics, microbial adhesion and biofilm growth remain poorly understood. Here, we investigate the effect of semiconfined features on biofilm formation. Using a microfluidic device and fluorescent time-lapse microscopy, we establish that confinement features can significantly affect biofilm formation. Biofilm dynamics change not only as a function of confinement features, but also of the total fluid flow rate, and our combination of experimental results and numerical simulations reveal insights into the link between hydrodynamics and biofilm formation.

Kumar, Aloke [ORNL] [ORNL; Karig, David K [ORNL] [ORNL; Neethirajan, Suresh [University of Guelph] [University of Guelph; Acharya, Rajesh K [ORNL] [ORNL; Mukherjee, Partha P [ORNL] [ORNL; Retterer, Scott T [ORNL] [ORNL; Doktycz, Mitchel John [ORNL] [ORNL

2013-01-01T23:59:59.000Z

449

Factors affecting expanded electricity trade in North America  

SciTech Connect (OSTI)

The authors explore factors that affect electricity trade between enterprises in the US and Canada and the US and Mexico. They look to those underlying policy and institutional factors that affect the relative costs of producing electricity in the three countries. In particular, they consider six factors that appear to have a significant impact on electricity trade in North America: differences in the types of economic regulation of power leading to differences in cost recovery for wholesale and retail power and wheeling charges; changing regulatory attitudes, placing more emphasis on demand-side management and environmental concerns; differences in energy and economic policies; differences in national and subnational environmental policies; changing organization of electric power industries which may foster uncertainty, change historical relationships, and provide other potentially important sources of power for distribution utilities; and differences in the ability of enterprises to gain access to electric power markets because of restrictions placed on transmission access. In Section 2, the authors discuss the regulation of electricity trade in North America and provide an overview of the recent trading experience for electricity between Canada and the US and between Mexico and the US, including the volume of that trade over the past decade and existing transmission capacity between regions of the three countries. In Section 3, they look at the benefits that accrue to trading counties and what those benefits are likely to be for the three countries. The discussion in Section 4 centers on the relevant provisions of the Canada Free Trade Agreement and the proposed North American Free Trade Agreement. In Section 5, they set the stage for the discussion of policy and institutional differences presented in Section 6 by outlining differences in the organization of the electric power sectors of Canada, the US, and Mexico. The study is synthesized in Section 7.

Hill, L.J.

1994-01-01T23:59:59.000Z

450

Tetramerization domain mutations in KCNA5 Identified in pulmonary arterial hypertension patients affect channel kinetics and cause abnormal subcellular localization  

E-Print Network [OSTI]

in pulmonary arterial hypertension patients affect channelin Pulmonary Arterial Hypertension Patients Affect Channelin Pulmonary Arterial Hypertension Patients Causes

Burg, Elyssa D.

2009-01-01T23:59:59.000Z

451

A process model for the heat-affected zone microstructure evolution in duplex stainless steel weldments: Part I. The model  

SciTech Connect (OSTI)

The present investigation is concerned with modeling of the microstructure evolution in duplex stainless steels under thermal conditions applicable to welding. The important reactions that have been modeled are the dissolution of austenite during heating, subsequent grain growth in the delta ferrite regime, and finally, the decomposition of the delta ferrite to austenite during cooling. As a starting point, a differential formulation of the underlying diffusion problem is presented, based on the internal-state variable approach. These solutions are later manipulated and expressed in terms of the Scheil integral in the cases where the evolution equation is separable or can be made separable by a simple change of variables. The models have then been applied to describe the heat-affected zone microstructure evolution during both thick-plate and thin-plate welding of three commercial duplex stainless steel grades: 2205, 2304, and 2507. The results may conveniently be presented in the form of novel process diagrams, which display contours of constant delta ferrite grain size along with information about dissolution and reprecipitation of austenite for different combinations of weld input energy and peak temperature. These diagrams are well suited for quantitative readings and illustrate, in a condensed manner, the competition between the different variables that lead to structural changes during welding of duplex stainless steels.

Hemmer, H.; Grong, O.

1999-11-01T23:59:59.000Z

452

Int. J. Solids Structures, Vol. 34, No. 10, pp 1255-1281, 1996 Author prepared preprint STRESS TRANSFER INTO A FRAGMENTED,  

E-Print Network [OSTI]

in fragmentation tests, the net strain is simply calculated from the applied stress, 0, the temperature is that the axial stress in the fiber at a fiber break is equal to zero in an averaged sense instead of exactly. Two in the fiber is zero. As a function of position away from the break stress transfers back into the fiber from

Nairn, John A.

453

Temperature and Scaling Studies from Projectile Fragmentation of 86,78Kr+64,58Ni at 35 MeV/A.  

E-Print Network [OSTI]

equation of state. Projectile fragmentation sources were identified from the reactions of 86,78Kr+64,58Ni at 35 MeV/A taken on the NIMROD-ISiS array. The angular coverage, excellent isotopic resolution, and Neutron Ball allow for quasi-complete event...

Wuenschel, Sara K.

2010-01-14T23:59:59.000Z

454

Symmetry energy and the isoscaling properties of the fragments in multifragmentation of 40Ca+58Ni, 40Ar+58Ni, and 40Ar+58Fe reactions  

E-Print Network [OSTI]

The symmetry energy and the isoscaling properties of the fragments produced in multifragmentation of 40Ar, 40Ca + 58Fe, 58Ni reactions at 25, 33, 45 and 53 MeV/nucleon were investigated within the framework of a statistical multifragmentation model...

Iglio, Jennifer Ann

2007-09-17T23:59:59.000Z

455

Knowledge Elecitation for Factors Affecting Taskforce Productivity using a Questionnaire  

E-Print Network [OSTI]

In this paper we present the process of Knowledge Elicitation through a structured questionnaire technique. This is an effort to depict a problem domain as Investigation of factors affecting taskforce productivity. The problem has to be solved using the expert system technology. This problem is the very first step how to acquire knowledge from the domain experts. Knowledge Elicitation is one of the difficult tasks in knowledge base formation which is a key component of expert system. The questionnaire was distributed among 105 different domain experts of Public and Private Organizations (i.e. Education Institutions, Industries and Research etc) in Pakistan. A total 61 responses from these experts were received. All the experts were well qualified, highly experienced and has been remained the members for selection committees a number of times for different posts. Facts acquired were analyzed from which knowledge was extracted and elicited. A standard shape was given to the questionnaire for further research as a knowledge learning tool. This tool may be used as a standard document for selection and promotion of employees.

Muhammad Sohail; Abdur Rashid Khan

2009-07-30T23:59:59.000Z

456

E-Print Network 3.0 - affect lactate disappearance Sample Search...  

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

at Two Stages of Lactation Summary: higher in early than in late lactation, but LM infusion did not affect these variables. Regardless... not affected by infusion of LM and were...

457

E-Print Network 3.0 - atp reduction affects Sample Search Results  

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

affects Search Powered by Explorit Topic List Advanced Search Sample search results for: atp reduction affects Page: << < 1 2 3 4 5 > >> 1 Dynamic Sensitivity of ATP-sensitive K...

458

E-Print Network 3.0 - affecting plasmid production Sample Search...  

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

plus an insert in the MCS) affected bacterial fit- ness in a selective... in minimal media did not affect copy number in plasmids of any size tested, and (iii) any growth...

459

Experimental reconstruction of primary hot isotopes and characteristic properties of the fragmenting source in the heavy ion reactions near the Fermi energy  

E-Print Network [OSTI]

The characteristic properties of the hot nuclear matter existing at the time of fragment formation in the multifragmentation events produced in the reaction $^{64}$Zn + $^{112}$Sn at 40 MeV/nucleon are studied. A kinematical focusing method is employed to determine the multiplicities of evaporated light particles, associated with isotopically identified detected fragments. From these data the primary isotopic yield distributions are reconstructed using a Monte Carlo method. The reconstructed yield distributions are in good agreement with the primary isotope distributions obtained from AMD transport model simulations. Utilizing the reconstructed yields, power distribution, Landau free energy, characteristic properties of the emitting source are examined. The primary mass distributions exhibit a power law distribution with the critical exponent, $A^{-2.3}$, for $A \\geq 15$ isotopes, but significantly deviates from that for the lighter isotopes. Landau free energy plots show no strong signature of the first order phase transition. Based on the Modified Fisher Model, the ratios of the Coulomb and symmetry energy coefficients relative to the temperature, $a_{c}/T$ and $a_{sym}/T$, are extracted as a function of A. The extracted $a_{sym}/T$ values are compared with results of the AMD simulations using Gogny interactions with different density dependencies of the symmetry energy term. The calculated $a_{sym}/T$ values show a close relation to the symmetry energy at the density at the time of the fragment formation. From this relation the density of the fragmenting source is determined to be $\\rho /\\rho_{0} = (0.63 \\pm 0.03 )$. Using this density, the symmetry energy coefficient and the temperature of fragmenting source are determined in a self-consistent manner as $a_{sym} = (24.7 \\pm 3.4) MeV$ and $T=(4.9 \\pm 0.2)$ MeV.

W. Lin; X. Liu; M. R. D. Rodrigues; S. Kowalski; R. Wada; M. Huang; S. Zhang; Z. Chen; J. Wang; G. Q. Xiao; R. Han; Z. Jin; J. Liu; P. Ren; F. Shi; T. Keutgen; K. Hagel; M. Barbui; C. Bottosso; A. Bonasera; J. B. Natowitz; T. Materna; L. Qin; P. K. Sahu; H. Zheng

2014-09-14T23:59:59.000Z

460

E-Print Network 3.0 - affect oviposition preference Sample Search...  

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

regardless of species identity. Oviposition preferences likely reflect... 1083 Plant architecture affects periodical cicada oviposition behavior on native and non......

Note: This page contains sample records for the topic "affects subsequent fragmentation" 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

How the Second Amendment to China's Patent Law Affects Firms' Patenting Behavior In this study, we examine how the second amendment to China's patent law affects the  

E-Print Network [OSTI]

How the Second Amendment to China's Patent Law Affects Firms' Patenting Behavior Abstract In this study, we examine how the second amendment to China's patent law affects the patenting behavior passed a second amendment to its patent system in 2000 in accordance with the Trade-Related Aspects

Sekhon, Jasjeet S.

462

Do metallic ports in tissue expanders affect postmastectomy radiation delivery?  

SciTech Connect (OSTI)

Purpose: Postmastectomy radiation therapy (PMRT) is often delivered to patients with permanent breast implants. On occasion, patients are irradiated with a tissue expander (TE) in place before their permanent implant exchange. Because of concern of potential under-dosing in these patients, we examined the dosimetric effects of the Magna-Site (Santa Barbara, CA) metallic port that is present in certain TEs. Methods and Materials: We performed ex vivo film dosimetry with single 6-MV and 15-MV photon beams on a water phantom containing a Magna-Site disc in two orientations. Additionally, using in vivo films, we measured the exit dose from 1 patient's TE-reconstructed breast during chest wall treatment with 15-MV tangent beams. Finally, we placed thermoluminescent dosimeters (TLDs) on 6 patients with TEs who received PMRT delivered with 15-MV tangent beams. Results: Phantom film dosimetry revealed decreased transmission in the region of the Magna-Site, particularly with the magnet in the parallel orientation (at 22 mm: 78% transmission with 6 MV, 84% transmission with 15 MV). The transmission measured by in vivo films during single beam treatment concurred with ex vivo results. TLD data showed acceptable variation in median dose to the skin (86-101% prescription dose). Conclusion: Because of potential dosimetric effects of the Magna-Site, it is preferable to treat PMRT patients with permanent implants. However, it is not unreasonable to treat with a TE because the volume of tissue affected by attenuation from the Magna-Site is small. In this scenario, we recommend using 15 MV photons with compensating bolus.

Damast, Shari [Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, NY (United States); Beal, Kathryn [Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, NY (United States)]. E-mail: bealk@mskcc.org; Ballangrud, Ase [Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, NY (United States); Losasso, Thomas J. [Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, NY (United States); Cordeiro, Peter G. [Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY (United States); Disa, Joseph J. [Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY (United States); Hong, Linda [Department of Radiation Oncology, Montefiore Medical Center, Bronx, NY (United States); McCormick, Beryl L. [Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, NY (United States)

2006-09-01T23:59:59.000Z

463

Crystal structure of P58(IPK) TPR fragment reveals the mechanism for its molecular chaperone activity in UPR  

SciTech Connect (OSTI)

P58(IPK) might function as an endoplasmic reticulum molecular chaperone to maintain protein folding homeostasis during unfolded protein responses. P58(IPK) contains nine tetratricopeptide repeat (TPR) motifs and a C-terminal J-domain within its primary sequence. To investigate the mechanism by which P58(IPK) functions to promote protein folding within the endoplasmic reticulum, we have determined the crystal structure of P58(IPK) TPR fragment to 2.5 {angstrom} resolution by the SAD method. The crystal structure of P58(IPK) revealed three domains (I-III) with similar folds and each domain contains three TPR motifs. An ELISA assay indicated that P58(IPK) acts as a molecular chaperone by interacting with misfolded proteins such as luciferase and rhodanese. The P58(IPK) structure reveals a conserved hydrophobic patch located in domain I that might be involved in binding the misfolded polypeptides. Structure-based mutagenesis for the conserved hydrophobic residues located in domain I significantly reduced the molecular chaperone activity of P58(IPK).

Tao, Jiahui; Petrova, Kseniya; Ron, David; Sha, Bingdong (UAB); (NYUSM)

2010-05-25T23:59:59.000Z

464

Study of the impacts of regulations affecting the acceptance of Integrated Community Energy Systems: public utility, energy facility siting and municipal franchising regulatory programs in the United States. Preliminary background report  

SciTech Connect (OSTI)

This report is one of a series of preliminary reports describing the laws and regulatory programs of the United States and each of the 50 states affecting the siting and operation of energy generating facilities likely to be used in Integrated Community Energy Systems (ICES). Public utility regulatory statutes, energy facility siting programs, and municipal franchising authority are examined to identify how they may impact on the ability of an organization, whether or not it be a regulated utility, to construct and operate an ICES. This report describes laws and regulatory programs in the United States. Subsequent reports will (1) describe public utility rate regulatory procedures and practices as they might affect an ICES, (2) analyze each of the aforementioned regulatory programs to identify impediments to the development of ICES, and (3) recommend potential changes in legislation and regulatory practices and procedures to overcome such impediments.

Feurer, D.A.; Weaver, C.L.; Gallagher, K.C.; Hejna, D.; Rielley, K.J.

1980-01-01T23:59:59.000Z

465

Study of Chelyabinsk LL5 meteorite fragment with a light lithology and its fusion crust using Mössbauer spectroscopy with a high velocity resolution  

SciTech Connect (OSTI)

Study of Chelyabinsk LL5 ordinary chondrite fragment with a light lithology and its fusion crust, fallen on February 15, 2013, in Russian Federation, was carried out using Mössbauer spectroscopy with a high velocity resolution. The Mössbauer spectra of the internal matter and fusion crust were fitted and all components were related to iron-bearing phases such as olivine, pyroxene, troilite, Fe-Ni-Co alloy, and chromite in the internal matter and olivine, pyroxene, troilite, Fe-Ni-Co alloy, and magnesioferrite in the fusion crust. A comparison of the content of different phases in the internal matter and in the fusion crust of this fragment showed that ferric compounds resulted from olivine, pyroxene, and troilite combustion in the atmosphere.

Maksimova, Alevtina A.; Petrova, Evgeniya V.; Grokhovsky, Victor I. [Department of Physical Techniques and Devices for Quality Control, Institute of Physics and Technology, Ural Federal University, Ekaterinburg, 620002 (Russian Federation); Oshtrakh, Michael I., E-mail: oshtrakh@gmail.com; Semionkin, Vladimir A. [Department of Physical Techniques and Devices for Quality Control, Institute of Physics and Technology, Ural Federal University, Ekaterinburg, 620002, Russian Federation and Department of Experimental Physics, Institute of Physics and Technology, Ura (Russian Federation)

2014-10-27T23:59:59.000Z

466

Electronic Structure and Fragmentation Properties of [Fe4S4(SEt)4-X(SSEt)x]2-  

SciTech Connect (OSTI)

A limited exposure of (n-Bu4N)2[Fe4S4(SEt)4] solutions in acetonitrile to air was found to produce a new series of [4Fe-4S] cluster complexes, [Fe4S4(SEt)4-x(SSEt)x]2- (x = 1-4), with the original –SEt ligands substituted by –SSEt di-sulfide ligands, which were formed due to partial decomposition of the [4Fe-4S] core in parent [Fe4S4(SEt)4]2-. The products were first observed in the experiments with an ESI-Ion Trap-TOF mass spectrometer and were further identified using high resolution FTICR (Fourier Transform Ion Cyclotron Resonance) mass spectrometer. Photoelectron spectra of the [Fe4S4(SEt)4-x(SSEt)x]2- dianions revealed that the –SSEt coordination induced little change in the electronic structure of the [4Fe-4S] cluster, but the electron binding energies of [Fe4S4(SEt)4-x(SSEt)x]2- increased from 0.52 to 0.73 eV with increase in x from 0 to 4, suggesting a greater electron withdrawing ability of –SSEt than -SEt. In high resolution MS/MS experiments on [Fe4S4(SEt)3(SSEt)]2-/1-, clusters with both charge states yielded fragment [Fe4S4(SEt)3]-, suggesting that –SSEt could be lost either as a negatively charged ion SSEt- from the doubly charged precursor, or as a radical •SSEt from the singly charged species. The biological implication of the interaction between [Fe4S4(SEt)4]2- and O2 is discussed in comparison to the air exposure of [4Fe-4S] proteins to the air.

Fu, Youjun; Laskin, Julia; Wang, Lai S.

2007-06-01T23:59:59.000Z

467

How realistic is the pore size distribution calculated from adsorption isotherms if activated carbon is composed of fullerene-like fragments?w  

E-Print Network [OSTI]

carbon is composed of fullerene-like fragments?w Artur P. Terzyk,*a Sylwester Furmaniak,a Peter J. F. Harris,b Piotr A. Gauden,a Jerzy W$och,c Piotr Kowalczykd and Gerhard Rychlickia Received 11th July 2007 incorporated fullerene-related elements was proposed by Harris et al.18­21 Although this model is quite widely

Harris, Peter J F

468

Effects of electrical stimulation on the myofibril protein degradation and fragmentation in bovine longissimus dorsi muscle and its relationship to tenderness  

E-Print Network [OSTI]

EFFECTS OF ELECTRICAL STIMULATION ON THE MYOFIBRIL PROTEIN DEGRADATION AND FRAGMENTATION IN BOVINE LONGISSIMUS DORSI MUSCLE AND ITS RELATIONSHIP TO TENDERNESS A Thesis by Maria Lucia Salles Cunha Procknor Submitted to the Graduate College... IN BOVINE LONGISSIMUS DORSI MUSCLE AND ITS RELATIONSHIP TO TENDERNESS A Thesis by MARIA LUCIA SALLES CUNHA PROCKNOR Approved as to style and content by: Thayne R. Dutson (Co-Chairman) Jeffrey W. Savell (Co-Chairman) Konrad A. Eugster (Member...

Procknor, Maria Lucia Salles Cunha

1984-01-01T23:59:59.000Z

469

Golden-cheeked Warbler (Dendroica chrysoparia) habitat fragmentation in Travis County, Texas: a remote sensing and geographical information system analysis of habitat extent, pattern and condition  

E-Print Network [OSTI]

analysis procedures were assessed for their utility in characterizing fragmentation patterns. Benson (1990) attempted to calculate a fractal dimension of potential GCW habitat "patches" within larger GCW habitat 'sites' and then correlate this parameter... recreational recreational Study Site Size (ha) 3, 420 1, 655 1, 202 1, 069 1, 833 504 1, 393 517 93 BULL CREEK Bull Creek (1, 655 ha) is characterized by a large, nearly contiguous block of habitat (Table 1). The topography is dominated by three...

Moses, Michael Edwin

1996-01-01T23:59:59.000Z

470

Quality Management and Job Quality: How the ISO 9001 Standard forQuality Management Systems Affects Employees and Employers  

E-Print Network [OSTI]

and Job Quality: How the ISO 9001 Standard for Qualityhave examined how the ISO 9001 Quality Management Systemcompanies in California. ISO 9001 adopters subsequently had

Levine, David I.; Toffel, Michael W.

2008-01-01T23:59:59.000Z

471

Investigation of the reaction {sup 208}Pb({sup 18}O, f): Folding angular distributions of fission fragments and gamma-ray multiplicity  

SciTech Connect (OSTI)

Correlations between folding angular distributions of fission fragments and the gamma-ray multiplicity are studied for {sup 18}O + {sup 208}Pb interactions at energies of the beam of {sup 18}O ions in the range E{sub lab} = 78-198.5 MeV. The probabilities are determined for complete-and incomplete-fusion processes inevitably followed by the fission of nuclei formed in these processes. It is found that the probability of incomplete fusion followed by fission increases with increasing energy of bombarding ions. It is shown that, for the incomplete-fusion process, folding angular distributions of fission fragments have a two-component structure. The width of folding angular distributions (FWHM) for complete fusion grows linearly with increasing energy of {sup 18}O ions. The multiplicity of gamma rays from fission fragments as a function of the linear-momentum transfer behaves differently for different energies of projectile ions. This circumstance is explained here by the distinction between the average angular momenta of participant nuclei in the fusion and fission channels, which is due to the difference in the probabilities of fission in the cases where different numbers of nucleons are captured by the target nucleus.

Rusanov, A. Ya. [National Nuclear Center of the Republic of Kazakhstan, Institute of Nuclear Physics (Kazakhstan)], E-mail: rusanov@inp.kz; Itkis, M. G.; Kondratiev, N. A.; Pokrovsky, I. V.; Salamatin, V. S. [Joint Institute for Nuclear Research (Russian Federation); Chubarian, G. G. [Cyclotron Institute, Texas A and M University (United States)

2007-10-15T23:59:59.000Z

472

Test of models for parton fragmentation by means of three-jet events in e/sup +/e/sup -/ annihilation at. sqrt. s-bar = 29 GeV  

SciTech Connect (OSTI)

The distribution of particles in three-jet events is compared with the predictions of three fragmentation models currently in use: the Lund string model, the Webber cluster model, and an independent fragmentation model. The Lund model and, to a certain extent, the Webber model provide reasonable descriptions of the data. The independent fragmentation model does not describe the distribution of particles at large angles with respect to the jet axes. The results provide evidence that the sources of hadrons are Lorentz boosted with respect to the overall c.m.

Aihara, H.; Alston-Garnjost, M.; Bakken, J.A.; Barbaro-Galtieri, A.; Barnes, A.V.; Barnett, B.A.; Bengtsson, H.; Blumenfeld, B.J.; Bross, A.D.; Buchanan, C.D.; Chamberlain, O.; Chien, C.; Clark, A.R.; Cordier, A.; Dahl, O.I.; Day, C.T.; Derby, K.A.; Eberhard, P.H.; Fancher, D.L.; Fujii, H.; Fujii, T.; Gabioud, B.; Gary, J.W.; Gorn, W.; Hadley, N.J.; Hauptman, J.M.; Hofmann, W.; Huth, J.E.; Hylen, J.; Kamae, T.; Kaye, H.S.; Kenney, R.W.; Kerth, L.T.; Koda, R.I.; Kofler, R.R.; Kwong, K.K.; Layter, J.G.; Lindsey, C.S.; Loken, S.C.; Lu, X.; Lynch, G.R.; Madansky, L.; Madaras, R.J.; Maruyama, K.; Marx, J.N.; Matthews, J.A.J.; Melnikoff, S.O.; Moses, W.; Nemethy, P.; Nygren, D.R.; Oddone, P.J.; Park, D.A.; Pevsner, A.; Pripstein, M.; Robrish, P.R.; Ronan, M.T.; Ross, R.R.; Rouse, F.R.; Sauerwein, R.R.; Shapiro, G.; Shapiro, M.D.; Shen, B.C.; Slater, W.E.; Stevenson, M.L.; Stork, D.H.; Ticho, H.K.; Toge, N.; von Daalen Wetters, R.F.; VanDalen, G.J.; van Tyen, R.; Wang, E.M.; Wayne, M.R.; Wenz

1985-01-28T23:59:59.000Z

473

E-Print Network 3.0 - affect contraction-stimulated glucose Sample...  

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Summary: ), this high concentration of glucose has the potential to affect protein folding in the ER. Finally, given... Unable To Convert Glucose to Glucose-6-Phosphate...

474

E-Print Network 3.0 - affects cesa-complex density Sample Search...  

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metric affected... of various modification functions. Density metrics ... Source: Palo Alto Research Center (PARC), User Interface Research Collection: Computer Technologies and...

475

E-Print Network 3.0 - affects local hematocrit Sample Search...  

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

2007. First published Dec 14, 2006;J Appl Physiol Summary: will different infusion rates affect hematocrit, and will hemodi- lution limit the length of the procedure......

476

E-Print Network 3.0 - affect glucose disposal Sample Search Results  

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glucoseinsulin regulatory system and ultradian Summary: the changes of the glucose infusion rate affect the sustained oscillations. Fig. 11 demonstrates... Journal of...

477

E-Print Network 3.0 - affects effective matrix Sample Search...  

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results for: affects effective matrix Page: << < 1 2 3 4 5 > >> 1 October 6, 2010 Matlab Assignments, day 5 Summary: the matrix. Discuss the effectiveness of defining the...

478

E-Print Network 3.0 - affects durably bonding Sample Search Results  

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adhesive layers are less affected, creep behavior of adhesively bonded joints... ABSTRACT SMITH, GLEN. Bond Characteristics and Qualifications of Adhesives for ... Source:...

479

E-Print Network 3.0 - affecting born mineral Sample Search Results  

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mineral mines may affect air quality. As with water pollution, mines can contribute to air pollution... Chapter 15 Mineral Resources and the Environment 12;Minerals found in a...

480

E-Print Network 3.0 - affect political support Sample Search...  

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political support Search Powered by Explorit Topic List Advanced Search Sample search results for: affect political support Page: << < 1 2 3 4 5 > >> 1 380 SDSU General Catalog...

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481

E-Print Network 3.0 - adjustments affect interactions Sample...  

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Information Processing Labs, ATR... be used to guide development of natural and affective robot motions. References Fidopiastis, C... , A.J. & Sandford, A.J. (1999) The perception...

482

E-Print Network 3.0 - affective word representations Sample Search...  

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2009 -Borovets, Bulgaria, pages 416420 Classification of Emotion Words in Russian and Romanian Languages Summary: representations provided better results for English affective...

483

E-Print Network 3.0 - affect cement penetration Sample Search...  

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a coating Summary: as an admixture in cement and as a coating on cement for electromagnetic interference shielding'' J. Cao, D... parameters that affect the shielding...

484

Factors Affecting Carbohydrate Production and the Formation of Transparent Exopolymer Particles (TEP) by Diatoms  

E-Print Network [OSTI]

factors affect carbohydrate and TEP production by diatoms, and consequently influences aggregate formation. These influences have a profound impact on biogeochemical cycling of carbon....

Chen, Jie

2014-03-25T23:59:59.000Z

485

E-Print Network 3.0 - affects leak rate Sample Search Results  

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American Waste to Energy Conference May 23-25, 2005, Orlando, Florida USA Summary: turbine and steam cycle issues affecting performance. Several low cost methods were used to...

486

E-Print Network 3.0 - affecting transcriptional regulation Sample...  

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transcription can persist to mark... a transcribed gene and affect its future regulation. Looping ... Source: Brickner, Jason - Department of Biochemistry, Molecular Biology, and...

487

E-Print Network 3.0 - affected energy production Sample Search...  

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the composition affects conversion efficiency. Developed energy... composition on bioenergy conversion using sorghum as a model ... Source: Texas A&M University, Spatial...

488

E-Print Network 3.0 - affecting cigarette smoking Sample Search...  

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cigarette smoking Search Powered by Explorit Topic List Advanced Search Sample search results for: affecting cigarette smoking Page: << < 1 2 3 4 5 > >> 1 Journal of Health...

489

High temperature affects olive fruit fly populations in California’s Central Valley  

E-Print Network [OSTI]

High temperature affects olive fruit fly populations inand Kent M. Daane Olive fruit fly commonly infests olives inthat trap counts for olive fruit fly adults in pesticide­

2011-01-01T23:59:59.000Z

490

E-Print Network 3.0 - affects courtship gene Sample Search Results  

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Collection: Environmental Sciences and Ecology 3 Experience improves courtship in male fruit flies REUVEN DUKAS Summary: , experience affected the courtship behaviour of male...

491

E-Print Network 3.0 - affects cognitive performance Sample Search...  

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cognitive performance Search Powered by Explorit Topic List Advanced Search Sample search results for: affects cognitive performance Page: << < 1 2 3 4 5 > >> 1 Ritter, F. E.,...