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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)

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation Print Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation Print Understanding charge-transfer processes at the atomic level of nanoscale systems is of the utmost importance for designing nanodevices based on quantum-dot structures, nanotubes, or two-dimensional graphene sheets. Researchers from Western Michigan University, Berkeley Lab, and other international research facilities investigated charge-transfer processes and subsequent ion fragmentation dynamics in nanoclusters composed of argon (Ar) shells and xenon (Xe) cores. The clusters were site-selectively ionized (i.e, ionization took place either in the xenon core or in the argon shell). Using a high-resolution photoelectron-ion coincidence technique at ALS Beamlines 10.0.1 and 11.0.2, the researchers concluded that charge-transfer processes and fragmentation dynamics are strongly influenced by the environment of the initially ionized atoms.

2

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation  

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

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation Print Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation Print Understanding charge-transfer processes at the atomic level of nanoscale systems is of the utmost importance for designing nanodevices based on quantum-dot structures, nanotubes, or two-dimensional graphene sheets. Researchers from Western Michigan University, Berkeley Lab, and other international research facilities investigated charge-transfer processes and subsequent ion fragmentation dynamics in nanoclusters composed of argon (Ar) shells and xenon (Xe) cores. The clusters were site-selectively ionized (i.e, ionization took place either in the xenon core or in the argon shell). Using a high-resolution photoelectron-ion coincidence technique at ALS Beamlines 10.0.1 and 11.0.2, the researchers concluded that charge-transfer processes and fragmentation dynamics are strongly influenced by the environment of the initially ionized atoms.

3

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation  

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

Site-Selective Ionization in Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation Print Wednesday, 30 June 2010 00:00 Understanding charge-transfer processes at the atomic level of nanoscale systems is of the utmost importance for designing nanodevices based on quantum-dot structures, nanotubes, or two-dimensional graphene sheets. Researchers from Western Michigan University, Berkeley Lab, and other international research facilities investigated charge-transfer processes and subsequent ion fragmentation dynamics in nanoclusters composed of argon (Ar) shells and xenon (Xe) cores. The clusters were site-selectively ionized (i.e, ionization took place either in the xenon core or in the argon shell). Using a high-resolution photoelectron-ion coincidence technique at ALS Beamlines 10.0.1 and 11.0.2, the researchers concluded that charge-transfer processes and fragmentation dynamics are strongly influenced by the environment of the initially ionized atoms.

4

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

E-Print Network [OSTI]

The factors affecting peptide fragmentation have been extensively studied in the literature in order to better predict the fragment ion spectra of peptides and proteins. While there are countless influences to consider, metal cation binding...

Kmiec, Kevin

2012-10-19T23:59:59.000Z

5

Crystalline fragments in glasses  

Science Journals Connector (OSTI)

The nature of tetrahedral molecular fragments is investigated in SiSe2 glasses using the molecular-dynamics method. The glass consists of both edge-sharing (ES) and corner-sharing tetrahedra. The ES tetrahedra are the building blocks of chain-like-molecular fragments. The two-edge-sharing tetrahedra are the nucleus, and corner-sharing configurations provide connecting hinges between fragments. Statistics of rings and fragments reveals that threefold and eightfold rings are most abundant, chainlike fragments that are typically 10–15 Å long occur mostly in eightfold rings, and the longest fragments occur in elevenfold rings.

Giomal A. Antonio; Rajiv K. Kalia; Aiichiro Nakano; Priya Vashishta

1992-04-01T23:59:59.000Z

6

Unconventional Relationshipsfor Hemicellulose Hydrolysis and Subsequent Cellulose Digestion  

E-Print Network [OSTI]

be pretreated with dilute sulfuric acid to recover high yields of sugars directly from hemicellulose and subsequently by enzymatic hydrolysis of the residual cellulose, and these sugars can be used to produce fuels and needed technology advances. Hemicellulose removal is affected by solids concentration and flow through

California at Riverside, University of

7

Modeling dihadron fragmentation functions  

SciTech Connect (OSTI)

We present a model for dihadron fragmentation functions, describing the fragmentation of a quark into two unpolarized hadrons. We tune the parameters of our model to the output of the PYTHIA event generator for two-hadron semi-inclusive production in deep-inelastic scattering at HERMES. Once the parameters of the model are fixed, we make predictions for other unknown fragmentation functions and for a single-spin asymmetry in the azimuthal distribution of {pi}{sup +}{pi}{sup -} pairs in semi-inclusive deep-inelastic scattering on a transversely polarized target at HERMES and COMPASS. Such asymmetry could be used to measure the quark transversity distribution function.

Bacchetta, Alessandro; Radici, Marco [Theory Group, Deutsches Elektronen-Synchroton DESY, D-22603 Hamburg (Germany); Dipartimento di Fisica Nucleare e Teorica, Universita di Pavia, and Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, I-27100 Pavia (Italy)

2006-12-01T23:59:59.000Z

8

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

9

Arnold Beckmann Separating fragments  

E-Print Network [OSTI]

. . . . . . . . . . . . . . . . . . 50 7 Bounded Predicative Arithmetic (BPA) 57 7.1 The language Arithmetic (BA) and BPA 67 8.1 Fragments of BA . . . . . . . . . . . . . . . . . . . . . . 67 8.2 Comparing theories of BA . . . . . . . . . . . . . . . . . 69 8.3 Comparing theories of BPA

Beckmann, Arnold

10

Threat Facilitates Subsequent Executive Control During Anxious Mood Jeffrey L. Birk  

E-Print Network [OSTI]

Threat Facilitates Subsequent Executive Control During Anxious Mood Jeffrey L. Birk Tufts) posits that low-level threat may facilitate behavioral performance by influencing executive control functions. Anxiety is thought to strengthen this effect by enhancing threat's affective significance

Patel, Aniruddh D.

11

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

12

New Scalings in Nuclear Fragmentation  

SciTech Connect (OSTI)

Fragment partitions of fragmenting hot nuclei produced in central and semiperipheral collisions have been compared in the excitation energy region 4-10 MeV per nucleon where radial collective expansion takes place. It is shown that, for a given total excitation energy per nucleon, the amount of radial collective energy fixes the mean fragment multiplicity. It is also shown that, at a given total excitation energy per nucleon, the different properties of fragment partitions are completely determined by the reduced fragment multiplicity (i.e., normalized to the source size). Freeze-out volumes seem to play a role in the scalings observed.

Bonnet, E. [GANIL (DSM-CEA/CNRS/IN2P3), F-14076 Caen cedex (France); Institut de Physique Nucleaire, CNRS/IN2P3, Universite Paris-Sud 11, F-91406 Orsay cedex (France); Borderie, B.; Rivet, M. F. [Institut de Physique Nucleaire, CNRS/IN2P3, Universite Paris-Sud 11, F-91406 Orsay cedex (France); Le Neindre, N. [Institut de Physique Nucleaire, CNRS/IN2P3, Universite Paris-Sud 11, F-91406 Orsay cedex (France); LPC, CNRS/IN2P3, Ensicaen, Universite de Caen, F-14050 Caen cedex (France); Raduta, Ad. R. [Institut de Physique Nucleaire, CNRS/IN2P3, Universite Paris-Sud 11, F-91406 Orsay cedex (France); National Institute for Physics and Nuclear Engineering, RO-76900 Bucharest-Magurele (Romania); Bougault, R. [LPC, CNRS/IN2P3, Ensicaen, Universite de Caen, F-14050 Caen cedex (France); Chbihi, A.; Frankland, J. D.; Wieleczko, J. P. [GANIL (DSM-CEA/CNRS/IN2P3), F-14076 Caen cedex (France); Galichet, E. [Institut de Physique Nucleaire, CNRS/IN2P3, Universite Paris-Sud 11, F-91406 Orsay cedex (France); Conservatoire National des Arts et Metiers, F-75141 Paris cedex 03 (France); Gagnon-Moisan, F. [Institut de Physique Nucleaire, CNRS/IN2P3, Universite Paris-Sud 11, F-91406 Orsay cedex (France); Laboratoire de Physique Nucleaire, Departement de Physique, de Genie Physique et d'Optique, Universite Laval, Quebec, G1K 7P4 (Canada); Guinet, D.; Lautesse, P. [Institut de Physique Nucleaire, CNRS/IN2P3, Universite Claude Bernard Lyon 1, F-69622 Villeurbanne cedex (France); Lukasik, J. [Institute of Nuclear Physics IFJ-PAN, PL-31342 Krakow (Poland); Marini, P. [Institut de Physique Nucleaire, CNRS/IN2P3, Universite Paris-Sud 11, F-91406 Orsay cedex (France); GANIL (DSM-CEA/CNRS/IN2P3), F-14076 Caen cedex (France); Parlog, M. [LPC, CNRS/IN2P3, Ensicaen, Universite de Caen, F-14050 Caen cedex (France); National Institute for Physics and Nuclear Engineering, RO-76900 Bucharest-Magurele (Romania)

2010-10-01T23:59:59.000Z

13

Biostimulation of Iron Reduction and Subsequent Oxidation of...  

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

Biostimulation of Iron Reduction and Subsequent Oxidation of Sediment Containing Fe-silicates and Fe-oxides: Effect of Redox Biostimulation of Iron Reduction and Subsequent...

14

The geomagnetic environment in which sea turtle eggs incubate affects subsequent magnetic navigation behaviour of hatchlings  

Science Journals Connector (OSTI)

...each trial, the magnetic coils were turned off so that turtles began each trial in the local magnetic field. A light-emitting diode (LED; peak lambda = 520 nm) located on the eastern side of the arena was illuminated. A hatchling was then...

2014-01-01T23:59:59.000Z

15

Parasitoid-specific induction of plant responses to parasitized herbivores affects colonization by subsequent herbivores  

Science Journals Connector (OSTI)

...expression of BoPIN that codes for a protease inhibitor downstream of the JA pathway (31). The induced responses of B. oleracea...Ryan CA ( 1995 ) Oligogalacturonides and chitosan activate plant defensive...AY795078 EF423805 BoPIN Cysteine proteinase inhibitor AB04405 DQ539645 X94946 U45450 EF423806...

Erik H. Poelman; Si-Jun Zheng; Zhao Zhang; Nanda M. Heemskerk; Anne-Marie Cortesero; Marcel Dicke

2011-01-01T23:59:59.000Z

16

Fission fragment angular distributions in the Be9 + Th232 reaction  

Science Journals Connector (OSTI)

Fission fragment angular distributions have been measured for a Be9 + Th232 system at four different beam energies around the Coulomb barrier. The experimental results on fission fragment anisotropies have been compared with predictions of the standard statistical saddle-point model (SSPM) and the preequilibrium fission (PEQ) model including projectile ground-state spin. It is observed that both SSPM and the PEQ model fail to reproduce the experimental results, indicating that projectile breakup may affect the fission fragment anisotropies.

S. Appannababu, R. G. Thomas, L. S. Danu, P. K. Rath, Y. K. Gupta, B. V. John, B. K. Nayak, D. C. Biswas, A. Saxena, S. Mukherjee, and R. K. Choudhury

2011-06-09T23:59:59.000Z

17

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

18

Fragmentation of hot classical drops  

Science Journals Connector (OSTI)

Time evolution of hot drops of matter containing ?230 or ?130 particles is studied by classical molecular dynamics. Initially, the drops have uniform density and a sharp surface. The chosen initial conditions include three values of density and a range of temperatures wide enough to study the phenomena of evaporation, fragmentation, and total vaporization in a unified fashion. The average density and temperature of central matter is measured periodically to obtain trajectories of the evolution in the ?,T plane. These trajectories indicate that the matter expands almost adiabatically until it reaches the region of adiabatic instabilities. Density inhomogeneities develop in this region, but the matter fragments only if the expansion continues to average densities of less than one-fourth the liquid density, otherwise it recondenses into a single blob. The recondensed matter and fragments have very crooked surfaces. If the temperature is high enough, the expanding matter does not enter the region of adiabatic instabilities and totally vaporizes. For initial densities of the order of equilibrium density, matter does not fragment or develop large inhomogeneities in the region enclosed by the isothermal and adiabatic spinodals. Thus it appears unlikely that fragmentation of small drops (nuclei) can be used to study the isothermal critical region of gas-liquid phase transition. A detailed tabulation of the energies and number of monomers, dimers, light, and heavy fragments emitted in each event is presented.

A. Vicentini; G. Jacucci; V. R. Pandharipande

1985-05-01T23:59:59.000Z

19

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

20

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

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

INTRODUCTION The replication and subsequent faithful segregation of  

E-Print Network [OSTI]

as they do not attach to microtubules and should be dispersed throughout the cytoplasm subsequent to nuclear, the nuclear membrane breaks down at the beginning of mitosis, and subsequently spindle microtubules attach, the nuclear membrane reassembles around each group of chromosomes to form two daughter nuclei. Therefore

Wahl, Geoffrey M.

22

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

23

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

24

V-201: Cisco Intrusion Prevention System SSP Fragmented Traffic Denial of  

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

1: Cisco Intrusion Prevention System SSP Fragmented Traffic 1: Cisco Intrusion Prevention System SSP Fragmented Traffic Denial of Service Vulnerability V-201: Cisco Intrusion Prevention System SSP Fragmented Traffic Denial of Service Vulnerability July 19, 2013 - 6:00am Addthis PROBLEM: Several vulnerabilities were reported in Cisco Intrusion Prevention System PLATFORM: Cisco ASA 5500-X Series Adaptive Security Appliances Cisco Intrusion Prevention System (IPS) 7.1 ABSTRACT: A vulnerability in the implementation of the code that processes fragmented traffic could allow an unauthenticated, remote attacker to cause the Analysis Engine process to become unresponsive or cause the affected system to reload. REFERENCE LINKS: Secunia Advisory SA54246 SecurityTracker ID: 1028806 Cisco Advisory ID: cisco-sa-20130717-ips CVE-2013-1218

25

Electroweak fragmentation functions for dark matter annihilation  

E-Print Network [OSTI]

Electroweak corrections can play a crucial role in dark matter annihilation. The emission of gauge bosons, in particular, leads to a secondary flux consisting of all Standard Model particles, and may be described by electroweak fragmentation functions. To assess the quality of the fragmentation function approximation to electroweak radiation in dark matter annihilation, we have calculated the flux of secondary particles from gauge-boson emission in models with Majorana fermion and vector dark matter, respectively. For both models, we have compared cross sections and energy spectra of positrons and antiprotons after propagation through the galactic halo in the fragmentation function approximation and in the full calculation. Fragmentation functions fail to describe the particle fluxes in the case of Majorana fermion annihilation into light fermions: the helicity suppression of the lowest-order cross section in such models cannot be lifted by the leading logarithmic contributions included in the fragmentation f...

Cavasonza, Leila Ali; Pellen, Mathieu

2014-01-01T23:59:59.000Z

26

Microbial Sequestration of Carbon Dioxide and Subsequent Conversion to Methane  

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

Sequestration of Carbon Dioxide and Subsequent Sequestration of Carbon Dioxide and Subsequent conversion to Methane By Nirupam Pal Associate Professor California Polytechnic State University San Luis Obispo, CA 93401 Email : npal@calpoly.edu Phone : (805) 756-1355 INTRODUCTION The rising level of carbon dioxide in the atmosphere has been of growing concern in recent years. The increasing levels of carbon dioxide, the most dominant component of greenhouse gases, contribute to global warming and changing global weather patterns which could potentially lead to catastrophic events that could threaten life in every form on this planet. The level of carbon dioxide in the worlds atmosphere has increased from about 280 ppm in 1850 to the current level of approximately 350 ppm. There are several natural sources and sinks of

27

The Top Quark, Its Discovery, and Subsequent Research  

Office of Scientific and Technical Information (OSTI)

The Top Quark, Its Discovery, and Subsequent Research The Top Quark, Its Discovery, and Subsequent Research Resources with Additional Information 'Ever since the existence of the bottom (or b) quark was inferred from the discovery of the Upsilon family of resonances at Fermilab in 1977, particle physicists have been on the lookout for its partner, called top (or t). The long search, which occupied experimenters at laboratories around the world, came to a successful conclusion in February 1995 with the announcement that the top quark had been observed in two experiments at the Tevatron proton-antiproton collider at Fermilab. ... Top Quark Courtesy Fermilab Top is the last of the fundamental constituents of subnuclear matter that theories of the strong, weak, and electromagnetic interactions and a wealth of experimental information had led particle physicists to expect. Theoretically, top's existence was required to make the electroweak theory internally consistent.'1

28

Breast cancer and pregnancy : how does a concurrent or subsequent pregnancy affect breast cancer diagnosis, management and outcomes?.  

E-Print Network [OSTI]

??[Truncated abstract] A diagnosis of breast cancer is a life-changing event for any woman. For young women and their families it can be devastating. Women… (more)

Ives, Angela Denise

2009-01-01T23:59:59.000Z

29

Maternal cortisol over the course of pregnancy and subsequent child amygdala and hippocampus volumes and affective problems  

Science Journals Connector (OSTI)

...N = 65) Outcome Value Maternal age, y 31.1 ± 6.5 Race/ethnicity, % Non-Hispanic white 37 Hispanic white 22 Black 6 Asian 20 Other 15 Annual household income, % $0 to $30,000 34.5 $30,001 to $60,000 13.8 $60,001 to...

Claudia Buss; Elysia Poggi Davis; Babak Shahbaba; Jens C. Pruessner; Kevin Head; Curt A. Sandman

2012-01-01T23:59:59.000Z

30

Background Fact Sheet Transfer of Depleted Uranium and Subsequent Transactions  

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

Background Fact Sheet Background Fact Sheet Transfer of Depleted Uranium and Subsequent Transactions At the direction of Energy Secretary Steven Chu, over many months, the Energy Department (DOE) has been working closely with Energy Northwest (ENW), the Tennessee Valley Authority (TVA), and USEC Inc. (USEC) to develop a plan to address the challenges at USEC's Paducah Gaseous Diffusion Plant (GDP) that advances America's national security interests, protects taxpayers, and provides benefits for TVA and the Bonneville Power Administration's (BPA's) electric ratepayers and business operations. BPA is ENW's sole customer, purchasing 100 percent of ENW's Columbia Generating Station's electric power as part of BPA's overall

31

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

32

sup 1 sup 0 B nucleus fragment yields  

E-Print Network [OSTI]

Without any free parameters, yields of boron projectile fragments have been received from calculations of a model of the cold fragmentation process

Lepekhin, F G

2002-01-01T23:59:59.000Z

33

TOWARDS AFFECTIVE ALGORITHMIC COMPOSITION  

E-Print Network [OSTI]

TOWARDS AFFECTIVE ALGORITHMIC COMPOSITION Duncan Williams* , Alexis Kirke* , Eduardo Reck Miranda are driving an emerging field: affective algorithmic composition. Strate- gies for algorithmic composition within the last decade) implementing systems for algorithmic composition with the intention of targeting

Miranda, Eduardo Reck

34

Recoil momenta of fragments from relativistic nuclear heavy ions  

Science Journals Connector (OSTI)

It is shown that the recoil momenta of isotopes produced by fragmentation of relativistic C12 and O16 projectiles can be understood from kinematics and a two-fragment approximation.NUCLEAR REACTIONS Recoil momenta of fragments from relativistic C12 and O16 projectiles. Kinematics and two-fragment model. Linear dependence on interfragment binding energy and target independence.

Naohiko Masuda and Fumiyo Uchiyama

1977-04-01T23:59:59.000Z

35

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

36

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

37

Energy Efficient Data Fragmentation for Ubiquitous Computing  

Science Journals Connector (OSTI)

......AND APPLICATIONS IN GRID AND CLOUD COMPUTING...and Applications in Grid and Cloud Computing...of interconnected smart devices that conduct...siondelaybyreducingcontrolpacketoverheadwhilepreserving the benefits of data fragmentation...evaluate the exact benefits that can be achieved...took more realistic grid topology of 15 nodes......

Yong Tae Park; Pranesh Sthapit; Jae-Young Pyun

2014-02-01T23:59:59.000Z

38

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

39

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

40

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

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While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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41

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

42

Efficient exploration of chemical space by fragment-based screening  

Science Journals Connector (OSTI)

Abstract Screening methods seek to sample a vast chemical space in order to identify starting points for further chemical optimisation. Fragment based drug discovery exploits the superior sampling of chemical space that can be achieved when the molecular weight is restricted. Here we show that commercially available fragment space is still relatively poorly sampled and argue for highly sensitive screening methods to allow the detection of smaller fragments. We analyse the properties of our fragment library versus the properties of X-ray hits derived from the library. We particularly consider properties related to the degree of planarity of the fragments.

Richard J. Hall; Paul N. Mortenson; Christopher W. Murray

2014-01-01T23:59:59.000Z

43

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

44

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

45

Size distribution functions for rock fragments  

Science Journals Connector (OSTI)

Abstract The capacity of 17 functions to represent the size distribution of fragmented rock is assessed on 1234 data sets of screened fragments from blasted and crushed rock of different origins, of sizes ranging from 0.002 to 2000 mm. The functions evaluated are Weibull, Grady, log-normal, log-logistic and Gilvarry, in their plain, re-scaled and bi-component forms, and also the Swebrec distribution and its bi-component extension. In terms of determination coefficient, the Weibull is the best two-parameter function for describing rock fragments, with a median R2 of 0.9886. Among re-scaled, three-parameter distributions, Swebrec and Weibull lead with median R2 values of 0.9976 and 0.9975, respectively. Weibull and Swebrec distributions tie again as best bi-component, with median R2 of 0.9993. Re-scaling generally reduces the unexplained variance by a factor of about four with respect to the plain function; bi-components further reduce this unexplained variance by a factor of about two to three. Size-prediction errors are calculated in four zones: coarse, central, fines and very fines. Expected and maximum errors in the different ranges are discussed. The extended Swebrec is the best fitting function across the whole passing range for most types of data. Bimodal Weibull and Grady distributions follow, except for the coarse range, where re-scaled forms are preferable. Considering the extra difficulty in fitting a five-parameter function with respect to a three-parameter one, re-scaled functions are the best choice if data do not extend far below 20% passing. If the focus is on the fine range, some re-scaled distributions may still do (Weibull, Swebrec and Grady, with maximum errors of 15–20% at 8% passing), but serious consideration should be given to bi-component distributions, especially extended Swebrec, bimodal Weibull and bimodal Grady.

José A. Sanchidrián; Finn Ouchterlony; Pablo Segarra; Peter Moser

2014-01-01T23:59:59.000Z

46

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

47

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.

48

Fragmentation of brittle plates by localized impact  

E-Print Network [OSTI]

In this letter we address the fragmentation of thin, brittle layers due to the impact of high-velocity projectiles. Our approach is a geometric statistical one, with lines and circles playing the role of cracks, randomly distributed over the surface. The specific probabilities employed to place the fractures come from an analysis of how the energy input propagates and dissipates over the material. The cumulative mass distributions $F(m)$ we obtain are in excellent agreement with the experimental data produced by T. Kadono [Phys. Rev. Lett. {\\bf 78}, 1444 (1997)]. Particularly, in the small mass regime we get $F(m)\\sim m^{-\\alpha}$, with $0.1<\\alpha<0.3$ for a quite broad range of dissipation strengths and total number of fragments. In addition we obtain the fractal dimension of the set of cracks and its correlation to the exponent $\\alpha$ that account for the experimental results given by Kadono and Arakawa [Phys. Rev. E {\\bf 65}, 035107(R) (2002)].

Rebeca C. Falcão; Fernando Parisio

2014-08-29T23:59:59.000Z

49

Many Factors Affect MPG  

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

Many Factors Affect Fuel Economy Many Factors Affect Fuel Economy How You Drive Vehicle Maintenance Fuel Variations Vehicle Variations Engine Break-In Vehicles in traffic Quick acceleration and heavy braking can reduce fuel economy by up to 33 percent on the highway and 5 percent around town. New EPA tests account for faster acceleration rates, but vigorous driving can still lower MPG. Excessive idling decreases MPG. The EPA city test includes idling, but more idling will lower MPG. Driving at higher speeds increases aerodynamic drag (wind resistance), reducing fuel economy. The new EPA tests account for aerodynamic drag up to highway speeds of 80 mph, but some drivers exceed this speed. Cold weather and frequent short trips can reduce fuel economy, since your engine doesn't operate efficiently until it is warmed up. In colder

50

Fragmentation Barriers of Toroidal and Bubble Nuclei  

E-Print Network [OSTI]

those estimated recently from liquid-drop models [24,25]. We simulate the dynamics of nucleus-nucleus collisions with the Boltzmann-Uehling-Uhlenbeck equation [27] Bt " (27r)s dB+ v V?f~ ?V?U V'zfq ? d k2dO ""v12[fsf4(l ?f1)(1?f2) ?f~f2(1 ?fs)(1 ?f4.../49(4)/1778(5)/$06. 00 R1778 1994 The American Physical Society 49 FRAGMENTATION BARRIERS OF TOROIDAL AND BUBBLE NUCLEI R1779 TOP VIEW FRONT VIEW and 2 for 2Mo+ 2Mo collisions at E/A =75 MeV and b=0, for both the stifF (Fig. 1) and the soft (Fig. 2) equa- tions...

Xu, HM; Gagliardi, Carl A.; Tribble, Robert E.; Wong, C. Y.

1994-01-01T23:59:59.000Z

51

Dependence of projectile fragmentation on target N/Z  

Science Journals Connector (OSTI)

Peripheral reactions of 28Si with 112Sn and 124Sn at 30, 40, and 50 MeV/nucleon were used to elucidate the effect of the neutron content of the target on the process of projectile fragmentation. It is demonstrated that the fragments that result from these projectile fragmentation reactions can be divided into those which are the result of statistical emission of the quasiprojectile and those that are part of a direct component. The statistical part is independent of the target whereas the isotopic composition of fragments from the direct component is dependent on the neutron content of the target.

R. Laforest; E. Ramakrishnan; D. J. Rowland; A. Ruangma; E. M. Winchester; E. Martin; S. J. Yennello

1999-05-01T23:59:59.000Z

52

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

53

Baryon production and the charmed-quark fragmentation function  

Science Journals Connector (OSTI)

The fragmentation function for a charmed quark into a charmed baryon should peak at large x like its fragmentation function for charmed mesons. With model assumptions the decay of these fast baryons can account for as much as 20 to 40% of the ?'s observed at large x in e+e- annihilation at Ec.m.=30 GeV.

Thomas A. DeGrand

1982-12-01T23:59:59.000Z

54

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

55

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

56

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

57

Development and biologic evaluation of a kit for preformed chelate technetium-99m radiolabeling of an antibody Fab fragment using a diamide dimercaptide chelating agent  

SciTech Connect (OSTI)

A kit has been developed for 99mTc antibody radiolabeling via defined chemistry using an N2S2 diamide dimercaptide bifunctional chelating agent and the performed chelate method. The process involved efficient transchelation of 99mTc from gluconate to 2,3,5,6-tetrafluorophenyl 4,5-bis-S-(1-ethoxyethyl) mercaptoacetamidopentanoate as an active ester ligand and subsequent conjugation to antibody lysine amine functional groups. The use of the ethoxyethyl group for sulfur protection allowed optimum yields of 99mTc N2S2 chelate formation with complete retention of the active ester. Subsequent addition of antibody Fab fragment gave 99mTc chelate conjugates indistinguishable from the stepwise in situ esterification and purification of the 99mTc N2S2 complex followed by conjugation as previously shown to give stable 99mTc antibody fragments with retained immunoreactivity and tumor-targeting properties.

Kasina, S.; Rao, T.N.; Srinivasan, A.; Sanderson, J.A.; Fitzner, J.N.; Reno, J.M.; Beaumier, P.L.; Fritzberg, A.R. (NeoRx Corporation, Seattle, WA (USA))

1991-07-01T23:59:59.000Z

58

?2 analyses of data on relativistic anomalous projectile fragments  

Science Journals Connector (OSTI)

Nuclear emulsion data from four experimental groups are now available on the interactions of relativistic anomalous projectile fragments. In the present paper we systematically combine these data together to form several different data sets, which are used to carry out a series of ?2 parameter studies. The anomalous particle fragment component in the relativistic nuclear beam has been characterized previously in terms of the parameters f and ?, where f is the anomalous particle fragment fraction in the secondary beam and ? is the average anomalous particle fragment mean free path in the emulsion. We extend this result here by setting ?=?0(2Z)-?, where Z is the nuclear charge of the anomalous particle fragment, so that we can investigate the Z dependence of ?. We also investigate isotopic effects in the equations used to describe "normal" secondary beam nuclei, and we examine the problem of optimizing the bin sizes used to represent the data. A series of (f, ?0, ?) parameter studies leads to the conclusion that the "anomalous particle fragment effect" exists for all Z values in the range Z=3-26 included in the ?2 analyses. These ?2 analyses also indicate that ?>0, so that the anomalous particle fragment ?'s are Z dependent, but the data are not sufficient to pin down a definite value of ?. In order to assess the physical content of these results, we define a domain within which nuclear mean free paths can be accounted for by conventional nuclear forces (but not necessarily by conventional nuclear structure). The Z-dependent anomalous particle fragment mean free paths lie approximately on the boundary of this domain. To conclude these studies, we use the anomalous particle fragment data sets and ?2 analyses to investigate some proposed theoretical models of anomalous particle fragment structure, and we mention some recent experiments using plastic or propane track detectors rather than nuclear emulsions that also provide evidence for the existence of the "anomalous particle fragment effect." On the basis of the present nuclear emulsion studies, the null hypothesis (the hypothesis of no anomalous particle fragment effect) is rejected by more than seven standard deviations, using either a Z-dependent or a pathlength-dependent representation of the data.NUCLEAR REACTIONS Heavy ion; analysis of anomalous projectile fragment production in emulsions and plastics; Z dependence of mean free paths.

Malcolm H. MacGregor

1983-07-01T23:59:59.000Z

59

Optimizing recoil-isomer tagging with the Argonne fragment mass analyzer  

Science Journals Connector (OSTI)

A new focal plane detector arrangement for the Fragment Mass Analyzer (FMA) has been built and tested at Argonne National Laboratory. This set-up is particularly sensitive for performing Recoil-Isomer Tagging on nuclei with isomeric states with lifetimes in the microsecond range. Recoiling nuclei from fusion–evaporation reactions at the target position are dispersed by their ratio of mass to charge ( A / q ) by the FMA and stopped in low pressure gas (air) at the focal plane. Subsequent gamma decays from isomeric states in the reaction products are observed using Ge detectors. A constant gas flow through the focal plane chamber efficiently removes longer-lived beta-decaying species from sight of the detectors. This set-up has been commissioned successfully with the microsecond isomer in 80Rb, populated via the 52Cr(32S, 3pn) reaction at 135 MeV.

A.B. Garnsworthy; C.J. Lister; P.H. Regan; B.B. Blank; I.J. Cullen; S. Gros; D.J. Henderson; G.A. Jones; Z. Liu; D. Seweryniak; B.R. Shumard; N.J. Thompson; S.J. Williams; S. Zhu

2008-01-01T23:59:59.000Z

60

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

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

Packaging and fabrication systems for extending storage life and subsequent retail caselife of pork  

E-Print Network [OSTI]

PACKAGING AND FABRICATION SYSTEMS FOR EXTENDING STORAGE LIFE AND SUBSEQUENT RETAIL CASELIPE OF PORK A Thesis STEVEN WAYNE RAPE Submitted to the Graduate College of Texas ASM University in partial fulfillment to the requirements for the degree... of MASTER OF SCIENCE December 1973 Major Subject: Animal Science (Meat Science) PACKAGING AND FABRICATION SYSTEMS FOR EXTENDING STORAGE LIFE AND SUBSEQUENT RETAIL CASELIFE OF PORK A Thesis by STEVEN WAYNE RAPE Approved as to style and content by...

Rape, Steven Wayne

2012-06-07T23:59:59.000Z

62

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

63

Fragment Formation and Phase Transitions in Heavy Ion Collisions  

E-Print Network [OSTI]

We investigate the thermodynamical properties of nuclear matter in heavy ion collisions, in particular with respect to questions of thermodynamical instability, phase transitions and fragmentation. For this we analyze results of relativistic transport calculations of Au+Au collisons at intermediate energies, separately for spectator and participant matter. On one hand, we determine local thermodynamical variables from the analysis of the local momentum distribution; on the other, we analyze fragment energy spectra in a blast model scenario. We find that the spectator represents an instable, equilibrized fragmenting source, while in the participant no such common source can be identified. Our results compare well with experimental determinations of temperatures and flow velocities.

T. Gaitanos; H. H. Wolter; C. Fuchs

2000-03-20T23:59:59.000Z

64

Optical model analyses of heavy ion fragmentation in hydrogen targets  

Science Journals Connector (OSTI)

Quantum-mechanical optical model methods for calculating cross sections for the fragmentation of high energy heavy ions by hydrogen targets are presented. The cross sections are calculated with a knockout-ablation collision formalism which has no arbitrary fitting parameters. Predictions of elemental production cross sections from the fragmentation of 1.2A MeV La139 nuclei and of isotope production cross sections from the fragmentation of 400A MeV S32 nuclei are in good agreement with recently reported experimental measurements.

Lawrence W. Townsend

1994-06-01T23:59:59.000Z

65

Quantitative study of Helicobacter pylori in gastric mucus by competitive PCR using synthetic DNA fragments.  

Science Journals Connector (OSTI)

...mucus by competitive PCR using synthetic DNA fragments T Furuta E Kaneko M...method using various amounts of synthetic DNA fragments containing the same...mucus by competitive PCR using synthetic DNA fragments. | Helicobacter pylori...

T Furuta; E Kaneko; M Suzuki; H Arai; H Futami

1996-10-01T23:59:59.000Z

66

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

67

An Experimental Study Of Hydromagmatic Fragmentation Through Energetic,  

Open Energy Info (EERE)

Experimental Study Of Hydromagmatic Fragmentation Through Energetic, Experimental Study Of Hydromagmatic Fragmentation Through Energetic, Non-Explosive Magma-Water Mixing Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: An Experimental Study Of Hydromagmatic Fragmentation Through Energetic, Non-Explosive Magma-Water Mixing Details Activities (0) Areas (0) Regions (0) Abstract: In this paper we report the first experimental investigation of non-explosive hydromagmatic fragmentation during energetic mixing with water. We mix magma and water by two methods: (1) pouring a basaltic melt between two converging water sprays; and (2) jetting basaltic melt at high pressure (3 MPa) through a nozzle into a tank of stagnant water. These experiments involved shear at relative velocities of ~ 5-16 m/s and vigorous mixing for less than a second, providing sufficient time for

68

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

69

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

70

James A. Spudich and Susan Watt PROTEOLYTIC FRAGMENTS OF  

E-Print Network [OSTI]

James A. Spudich and Susan Watt MYOSIN PROTEOLYTIC FRAGMENTS OF COMPLEX WITH ACTIN THE PROTEOLYTlC l?RAGMEKTS OF MYOSLN (Received for publication, March 19, 1971) JAMES h. SPUDICH* AXD Susm WATT

Spudich, James A.

71

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

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

2006. The responses of understorey birds to forest fragmentation, logging and Summary: wildfires, and habitat fragmentation. The different disturbance treatments had distinct...

72

Shock compression and dynamic fragmentation of geological materials  

E-Print Network [OSTI]

. The theory of fracture and fragmentation and previous fracture studies on geological materials are reviewed in Chap- ter 6. The dynamic fragmentation experiments on the geological materials and how their response compares with predictions from metal... of the cube exposed. The exposed surface was polished using Silicon Carbide paste on a polish- ing machine to create a flat specimen. Each specimen was viewed under 13 14 CHAPTER 2. COMPOSITION & MICROSTRUCTURE an optical microscope to preliminarily...

Kirk, Simon

2014-11-11T23:59:59.000Z

73

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

74

Parton fragmentation in the vacuum and in the medium  

E-Print Network [OSTI]

We present the mini-proceedings of the workshop on ``Parton fragmentation in the vacuum and in the medium'' held at the European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*, Trento) in February 2008. The workshop gathered both theorists and experimentalists to discuss the current status of investigations of quark and gluon fragmentation into hadrons at different accelerator facilities (LEP, B-factories, JLab, HERA, RHIC, and Tevatron) as well as preparations for extension of these studies at the LHC. The main physics topics covered were: (i) light-quark and gluon fragmentation in the vacuum including theoretical (global fits analyses and MLLA) and experimental (data from e+e-, p-p, e-p collisions) aspects, (ii) strange and heavy-quark fragmentation, (iii) parton fragmentation in cold QCD matter (nuclear DIS), and (iv) medium-modified fragmentation in hot and dense QCD matter (high-energy nucleus-nucleus collisions). These mini-proceedings consist of an introduction and short summ...

Albino, S; Arleo, F; Besson, D; Brooks, W; Buschbeck, B; Cacciari, M; Christova, E; Corcella, G; d'Enterria, D; Dolejsi, J; Domdey, S; Estienne, M; Hamacher, K; Heinz, M; Hicks, K; Kettler, D; Kumano, S; Moch, S -O; Muccifora, V; Pacetti, S; Perez-Ramos, R; Pirner, H -J; Pronko, A; Radici, M; Rak, J; Roland, C; Rudolph, G; Rurikova, Z; Salgado, C A; Sapeta, S; Saxon, D H; Seidl, R; Seuster, R; Stratmann, M; Tannenbaum, M J; Tasevsky, M; Trainor, T; Traynor, D; Werlen, M; Zhou, C

2008-01-01T23:59:59.000Z

75

Parton fragmentation in the vacuum and in the medium  

E-Print Network [OSTI]

We present the mini-proceedings of the workshop on ``Parton fragmentation in the vacuum and in the medium'' held at the European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*, Trento) in February 2008. The workshop gathered both theorists and experimentalists to discuss the current status of investigations of quark and gluon fragmentation into hadrons at different accelerator facilities (LEP, B-factories, JLab, HERA, RHIC, and Tevatron) as well as preparations for extension of these studies at the LHC. The main physics topics covered were: (i) light-quark and gluon fragmentation in the vacuum including theoretical (global fits analyses and MLLA) and experimental (data from e+e-, p-p, e-p collisions) aspects, (ii) strange and heavy-quark fragmentation, (iii) parton fragmentation in cold QCD matter (nuclear DIS), and (iv) medium-modified fragmentation in hot and dense QCD matter (high-energy nucleus-nucleus collisions). These mini-proceedings consist of an introduction and short summaries of the talks presented at the meeting.

S. Albino; F. Anulli; F. Arleo; D. Besson; W. Brooks; B. Buschbeck; M. Cacciari; E. Christova; G. Corcella; D. d'Enterria; J. Dolejsi; S. Domdey; M. Estienne; K. Hamacher; M. Heinz; K. Hicks; D. Kettler; S. Kumano; S. -O. Moch; V. Muccifora; S. Pacetti; R. Perez-Ramos; H. -J. Pirner; A. Pronko; M. Radici; J. Rak; C. Roland; G. Rudolph; Z. Rurikova; C. A. Salgado; S. Sapeta; D. H. Saxon; R. Seidl; R. Seuster; M. Stratmann; M. J. Tannenbaum; M. Tasevsky; T. Trainor; D. Traynor; M. Werlen; C. Zhou

2008-04-12T23:59:59.000Z

76

Effects of thermal pretreatment (removal of steric hindrance) on subsequent nuclear hydrogenation of heavy alkylaromatics  

SciTech Connect (OSTI)

The changes in structures by thermal pretreatment of heavy alkylaromatics, which are very difficult to nuclear hydrogenate, and the effects of the pretreatment on subsequent nuclear hydrogenation were investigated in comparison with catalytic pretreatment of the same feedstock. The following results were obtained: (1) the structures of the thermally pretreated products are quite different from those of the catalytically pretreated ones; (2) subsequent nuclear hydrogenation of the thermally pretreated products becomes much easier because the steric hindrance is removed; (3) in the case where the same feedstock was catalytically pretreated, the products were difficult to nuclear hydrogenate. These results suggest various applications, including heavy oil hydrotreating.

Kubo, Junichi [Nippon Oil Co., Ltd., Yokohama (Japan). Central Technical Research Lab.] [Nippon Oil Co., Ltd., Yokohama (Japan). Central Technical Research Lab.

1996-01-01T23:59:59.000Z

77

Experimental and numerical studies of high-velocity impact fragmentation  

SciTech Connect (OSTI)

Developments are reported in both experimental and numerical capabilities for characterizing the debris spray produced in penetration events. We have performed a series of high-velocity experiments specifically designed to examine the fragmentation of the projectile during impact. High-strength, well-characterized steel spheres (6.35 mm diameter) were launched with a two-stage light-gas gun to velocities in the range of 3 to 5 km/s. Normal impact with PMMA plates, thicknesses of 0.6 to 11 mm, applied impulsive loads of various amplitudes and durations to the steel sphere. Multiple flash radiography diagnostics and recovery techniques were used to assess size, velocity, trajectory and statistics of the impact-induced fragment debris. Damage modes to the primary target plate (plastic) and to a secondary target plate (aluminum) were also evaluated. Dynamic fragmentation theories, based on energy-balance principles, were used to evaluate local material deformation and fracture state information from CTH, a three-dimensional Eulerian solid dynamics shock wave propagation code. The local fragment characterization of the material defines a weighted fragment size distribution, and the sum of these distributions provides a composite particle size distribution for the steel sphere. The calculated axial and radial velocity changes agree well with experimental data, and the calculated fragment sizes are in qualitative agreement with the radiographic data. A secondary effort involved the experimental and computational analyses of normal and oblique copper ball impacts on steel target plates. High-resolution radiography and witness plate diagnostics provided impact motion and statistical fragment size data. CTH simulations were performed to test computational models and numerical methods.

Kipp, M.E.; Grady, D.E.; Swegle, J.W.

1993-08-01T23:59:59.000Z

78

Plant Protein Localization Using Discriminative and Frequent Partition-Based Subsequences  

E-Print Network [OSTI]

Plant Protein Localization Using Discriminative and Frequent Partition-Based Subsequences S. Vahid. Extracellular plant proteins are responsible for vital functions such as nutrition acquisi- tion, protection to the extracellular space. There is a variety of localization sites within plant cells such as nucleus, mito- chondria

Zaiane, Osmar R.

79

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.

80

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

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

Visual discrimination pretraining facilitates subsequent visual-cue-toxicosis conditioning in rats  

E-Print Network [OSTI]

to visually-novel foods. We found that rats which had been pretrained to use visual features of their foodVisual discrimination pretraining facilitates subsequent visual-cue-toxicosis conditioning in rats, Colorado 80309 #12;Abstract The present experiments were undertaken to determine whether rats, pre trained

Galef Jr., Bennett G.

82

On the voting power of an alliance and the subsequent power of its members  

E-Print Network [OSTI]

On the voting power of an alliance and the subsequent power of its members Marc R. Feix have interest to form a single voting alliance giving an average gain of influence for all of them. Here, assuming the usual independence of votes, we first study the alliance voting power and obtain new

Paris-Sud XI, Université de

83

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

84

Longitudinal momentum distributions of heavy-ion fragments in peripheral reaction  

Science Journals Connector (OSTI)

The kinematical two-body fragmentation model is generalized to multibody fragmentation. Comparison with statistical model is given and possible experiments to distinguish the two models are suggested.NUCLEAR REACTIONS C12, O16, Ar40 beam fragmentation, p=1,2 GeV/nucleon, target independent momentum distribution, fragment mass dependence, extension of pseudo-two-body.

Fumiyo Uchiyama

1981-02-01T23:59:59.000Z

85

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

86

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

87

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

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 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

89

Estimation of the minimum shielding failure flashover current for first and subsequent lightning strokes to overhead transmission lines  

Science Journals Connector (OSTI)

Abstract ATP-EMTP simulations are performed to estimate the minimum shielding failure current causing flashover in overhead transmission lines with operating voltage in the range of 66 kV up to 735 kV. This critical current, affecting shielding failure flashover rate, is of great importance for assessing the insulation coordination of overhead transmission lines and the connected substations. The minimum shielding failure current causing flashover of line insulation is highly dependent upon insulator string flashover modelling and, also, markedly higher than that calculated according to the relevant IEEE Std 1243-1997 simplified expression. A modification of the latter is suggested by using multiplication factors of 1.5 and 1.65 for first and subsequent lightning strokes, respectively, so as to account for the increased dielectric strength of line insulator strings under non-standard lightning overvoltage surges. Alternatively, the critical currents can be respectively estimated by using average negative breakdown gradients per unit length of insulator string of 680 kV/m and 750 kV/m. The shielding failure flashover rate of the overhead transmission lines, being greatly influenced by insulator string flashover modelling, is lower than that obtained based on the critical current according to IEEE Std 1243-1997.

Zacharias G. Datsios; Pantelis N. Mikropoulos; Thomas E. Tsovilis

2014-01-01T23:59:59.000Z

90

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

91

Reviewing model calculations of the Collins fragmentation function  

SciTech Connect (OSTI)

The Collins fragmentation function describes a left/right asymmetry in the fragmentation of a transversely polarized quark into a hadron in a jet. Four different model calculations of the Collins function have been presented in the literature. While based on the same concepts, they lead to different results and, in particular, to different signs for the Collins function. The purpose of the present work is to review the features of these models and correct some errors made in previous calculations. A full study of the parameter dependence and the possible modifications to these models is beyond the scope of the paper. However, some general conclusions are draw000.

Amrath, Daniela [Institut fuer Theoretische Physik II, Ruhr-Universitaet Bochum, D-44780 Bochum (Germany); Deutsches Elektronen-Synchroton DESY, D-22603 Hamburg (Germany); Bacchetta, Alessandro [Institut fuer Theoretische Physik, Universitaet Regensburg, D-93040 Regensburg (Germany); Metz, Andreas [Institut fuer Theoretische Physik II, Ruhr-Universitaet Bochum, D-44780 Bochum (Germany)

2005-06-01T23:59:59.000Z

92

XUV postionization of fragments of photodissociated C{sub 60}  

SciTech Connect (OSTI)

We report experimental evidence for the loss of neutral C, C{sub 2}, C{sub 3}, and C{sub 4} from photoexcited C{sub 60} and C{sub 70}. These species are detected by postionization with XUV radiation formed by four-wave mixing in Kr vapor. The fragments have been detected in the nascent distribution (i.e., before total disintegration of the fullerene-size molecular entities). A resonant autoionization transition in C atom has yielded an upper limit to the translational energy release for dissociation into C atoms. The detection of these products gives new insight into the fragmentation mechanism of fullerenes.

Lykke, K.R.

1995-06-01T23:59:59.000Z

93

Prompt {gamma}-ray spectroscopy of isotopically identified fission fragments  

SciTech Connect (OSTI)

Measurements of prompt Doppler-corrected deexcitation {gamma} rays from uniquely identified fragments formed in fusion-fission reactions of the type {sup 12}C({sup 238}U,{sup 134}Xe)Ru are reported. The fragments were identified in both A and Z using the variable-mode, high-acceptance magnetic spectrometer VAMOS. States built on the characteristic neutron configurations forming high-spin isomers (7{sup -} and 10{sup +}) in {sup 134}Xe are presented and compared with the predictions of shell-model calculations using a new effective interaction in the region of Z{>=}50 and N{<=}82.

Shrivastava, A.; Caamano, M.; Rejmund, M.; Navin, A.; Rejmund, F.; Lemasson, A.; Schmitt, C.; Derkx, X.; Fernandez-Dominguez, B.; Golabek, C.; Roger, T. [GANIL, CEA/DSM--CNRS/IN2P3, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5 (France); Schmidt, K.-H. [GANIL, CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5 (France) and GSI-Helmholtzzentrum fuer Schwerionenforschung mbH, Planckstrasse 1, D-64220 Darmstadt (Germany); Gaudefroy, L.; Taieb, J. [CEA, DAM, DIF, F-91297 Arpajon (France); Sieja, K. [GSI-Helmholtzzentrum fuer Schwerionenforschung mbH, Planckstrasse 1, D-64220 Darmstadt (Germany); Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany); Audouin, L.; Bacri, C. O. [Institut de Physique Nucleaire, IN2P3-CNRS, Universite Paris Sud, F-91406 Orsay (France); Barreau, G.; Jurado, B. [Centre d'Etudes Nucleaires de Bordeaux Gradignan--UMR 5797, CNRS/IN2P3-Universite Bordeaux 1, F-33175 Gradignan Cedex (France); Benlliure, J. [Universidade de Santiago de Compostela, E-15782 Santiago de Compostela (Spain)] (and others)

2009-11-15T23:59:59.000Z

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

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

96

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

97

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

98

Enriching media fragments with named entities for video classification  

Science Journals Connector (OSTI)

With the steady increase of videos published on media sharing platforms such as Dailymotion and YouTube, more and more efforts are spent to automatically annotate and organize these videos. In this paper, we propose a framework for classifying video ... Keywords: concept extraction, media annotation, media fragment, named entity extraction, nerd, video classification

Yunjia Li; Giuseppe Rizzo; José Luis Redondo García; Raphaël Troncy; Mike Wald; Gary Wills

2013-05-01T23:59:59.000Z

99

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

100

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.

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 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

102

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.

103

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.

104

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

105

Shear fragmentation of unstable flux flow Milind N. Kunchur,1,  

E-Print Network [OSTI]

in resistivity. At high-flux densities B, the relatively incompressible vortex matter fragments into domains vortices containing an elementary quantum of flux o hc/2e. A transport cur- rent density j exerts a Lorentz film in a perpendicular applied flux density B along z^, with j and the electric field E vB/c along y

Kunchur, Milind N.

106

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

107

Tumorigenic transformation induced by a specific fragment of DNA from herpes simplex virus type 2  

Science Journals Connector (OSTI)

...S-1) DNA, was labeled in vitro by a modification of the nick translation pro- cedure (10). Reaction mixtures (100...and the expression of this fragment in the transformed cells merit discussion. DNA fragments were studied at concentrations...

R J Jariwalla; L Aurelian; P O Ts'o

1980-01-01T23:59:59.000Z

108

Design of a Fragment Library that maximally represents available chemical space  

Science Journals Connector (OSTI)

Cheminformatics protocols have been developed and assessed that identify a small set of fragments which can represent the compounds in a chemical library for use in fragment-based ligand discovery. Six differe...

M. N. Schulz; J. Landström; K. Bright…

2011-07-01T23:59:59.000Z

109

Photo-fragmentation of the closo-carboranes Part 1: Energetics of Decomposition  

E-Print Network [OSTI]

Photo-fragmentation of the closo-carboranes Part 1:is accepted) TITLE RUNNING HEAD: Photo-fragmentation of thefollowing B 1s and C 1s photo-excitation of the three

Feng, Danqin

2008-01-01T23:59:59.000Z

110

Patch size effects on plant species decline in an experimentally fragmented landscape  

E-Print Network [OSTI]

the relative contribution of fragment size vs. succession on species' declines by examining distributions of abundances for 18 plant species declining over time in an experimentally fragmented landscape in northeast Kansas, USA. If patch size effects dominate...

Collins, Cathy Diane; Holt, Robert D.; Foster, Brian L.

2009-09-01T23:59:59.000Z

111

Priming index of the Spanish word fragments from the Dasí, Soler, and Ruiz (2004) database  

Science Journals Connector (OSTI)

Word-fragment completion is a frequently used test in implicit ... ) in which the fragments were described for indices, such as difficulty, familiarity, frequency, ... /archive). In this work, a new index, thepri...

Carmen Dasí; María José Soler; Juan Carlos Ruiz

2007-08-01T23:59:59.000Z

112

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)

for: amino-terminal fragment 1-431 Page: << < 1 2 3 4 5 > >> 1 Proc. Natl. Acad. Sci. USA Vol. 84, pp. 4791-4795, July 1987 Summary: Da amino-terminal heparin-binding fragment,...

113

Argonne Gas-filled Fragment Analyzer-AGFA  

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

Gas-filled Fragment Analyzer-AGFA Gas-filled Fragment Analyzer-AGFA Argonne National Laboratory B.B. Back, R.V.F. Janssens, W.F. Henning, T.L. Khoo, J.A. Nolen, D.H. Potterveld, G. Savard, D. Seweryniak Hebrew University, Jerusalem, Israel M. Paul University of Massachusetts Lowell P. Chowdhury, C.J. Lister University of Maryland W.B. Walters University of Edinburgh P.J. Woods Lawrence Berkeley National Laboratory K. Gregorich Oregon State University W. Loveland Date: February 11, 2013 Abstract As the premier stable-beam user facility in the USA, ATLAS is currently being upgraded to provide high intensity (>1 pμA) stable beams. The combination of new high- efficiency detectors and intense beams will move ATLAS to the forefront as a world

114

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

115

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

116

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

117

E-Print Network 3.0 - antibody fragments specific Sample Search...  

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

of single chain antibody fragments ... Source: Lebendiker, Mario - Wolfson Centre for Applied Structural Biology, Hebrew University of Jerusalem Collection: Biotechnology ;...

118

E-Print Network 3.0 - antibody fragment clones Sample Search...  

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

setup Expression of antibody fragments... setup Expression of antibody ... Source: Utrecht, Universiteit - Departement Biologie, Theoretical BiologyBioinformatics Group...

119

E-Print Network 3.0 - antibody fragments stabs Sample Search...  

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

of single chain antibody fragments ... Source: Lebendiker, Mario - Wolfson Centre for Applied Structural Biology, Hebrew University of Jerusalem Collection: Biotechnology ;...

120

E-Print Network 3.0 - anti-interferon antibody fragment Sample...  

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

of single chain antibody fragments ... Source: Lebendiker, Mario - Wolfson Centre for Applied Structural Biology, Hebrew University of Jerusalem Collection: Biotechnology ;...

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

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

122

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

123

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

124

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

125

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

126

Herpes simplex virus mRNA species mapping in EcoRI fragment I.  

Science Journals Connector (OSTI)

...formed when fragment W (0.689-0.707) was used; same size band seen when DNA fragment F-I (0.698-0.721) was usec mRNA was hybridized with DNA fragment B-I (0.712-0.721) 5' end-la site at 0.712 (tracks iv and v) or the (tracks...

L M Hall; K G Draper; R J Frink; R H Costa; E K Wagner

1982-08-01T23:59:59.000Z

127

Elby Coherence vs. Fragmentation in student epistemologies p. 1 DRAFT paper please do not cite  

E-Print Network [OSTI]

Elby Coherence vs. Fragmentation in student epistemologies p. 1 DRAFT paper ­ please do not cite Coherence vs. Fragmentation in student epistemologies: A reply to Smith & Wenk Andrew Elby Department Coherence vs. Fragmentation in student epistemologies p. 2 Abstract In the literature on conceptual change

Elby, Andy

128

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

E-Print Network [OSTI]

Linearly Scaling 3D Fragment Method for Large-Scale Electronic Structure Calculations Lin-Wang Wang-dimensional fragment (LS3DF) method for large scale ab initio electronic structure calculations. LS3DF is based. The fragments of the LS3DF algorithm can be calculated separately with different groups of processors

Bailey, David H.

129

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...

130

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

131

Charmed-hadron fragmentation functions from CERN LEP1 revisited  

Science Journals Connector (OSTI)

In Phys. Rev. D 58, 014014 (1998) and 71, 094013 (2005), we determined nonperturbative D0, D+, D*+, Ds+, and ?c+ fragmentation functions, both at leading and next-to-leading order in the MS¯ factorization scheme, by fitting e+e- data taken by the OPAL Collaboration at CERN LEP1. The starting points for the evolution in the factorization scale ? were taken to be ?0=2mQ, where Q=c, b. For the reader’s convenience, in this paper, we repeat this analysis for ?0=mQ, where the flavor thresholds of modern sets of parton density functions are located.

Bernd A. Kniehl and Gustav Kramer

2006-08-01T23:59:59.000Z

132

Medium effects and jet fragmentation at the LHC  

SciTech Connect (OSTI)

In this work we study the production of charged hadrons in ultrarelativistic heavy ion collisions. We quantify the medium effects by calculating the nuclear ratio R{sub AA} as a function of the transverse momentum of the produced hadron. The main ingredients are the shadowing of the nuclear parton distributions, the jet energy loss and the fragmentation functions modified by the hot and dense medium. Our results are focused on the interplay of the different effects, and results are compared with recent LHC data.

Martins, S.; Mariotto, C. B.; Mackedanz, L. F. [Instituto de Matematica, Estatistica e Fisica, Universidade Federal do Rio Grande, Caixa Postal 474, CEP 96203-900, Rio Grande, RS (Brazil)

2013-03-25T23:59:59.000Z

133

Notices LIST OF AFFECTED PROGRAMS  

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

90 Federal Register 90 Federal Register / Vol. 76, No. 175 / Friday, September 9, 2011 / Notices LIST OF AFFECTED PROGRAMS CFDA No. and name Publication date and FEDERAL REG- ISTER citation Original deadline for transmittal of applications Revised deadline for transmittal of applications Original deadline for inter-govern- mental review Extended dead- line for inter-gov- ernmental review 84.215N: Promise Neighborhoods Program- Implementation. 7/6/2011 76 FR 39615. 9/06/2011 9/13/2011 11/03/2011 11/10/2011 84.215P: Promise Neighborhoods Program- Planning. 7/06/2011 76 FR 39630. 9/06/2011 9/13/2011 11/03/2011 11/10/2011 Electronic Access to This Document The official version of this document is the document published in the Federal Register. Free Internet access to the official edition of the Federal

134

Notices Affected Public: Individuals and  

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

23 Federal Register 23 Federal Register / Vol. 76, No. 23 / Thursday, February 3, 2011 / Notices Affected Public: Individuals and households; not-for-profit institutions; State, Local, or Tribal Government, State Educational Agencies or Local Educational Agencies. Total Estimated Number of Annual Responses: 22,760. Total Estimated Number of Annual Burden Hours: 8,725. Abstract: The study is being conducted as part of the National Assessment of Title I, mandated by Title I, Part E, Section 1501 of the Elementary and Secondary Education Act. The study is designed to identify school programs and instructional practices associated with improved language development, background knowledge, and comprehension outcomes for children in prekindergarten through third grade. Analyses will estimate the

135

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

136

Using Fragmentation To Increase Reliability For Workflow Systems  

Science Journals Connector (OSTI)

In a large organization, at any moment there may exist a large number of process instances. If a failure occurs a considerable number of them may be affected. Thus enhancing reliability is an important issue in workflow applications. Traditionally, reliability ...

J. Tang; J. Veijalainen

1999-04-01T23:59:59.000Z

137

Induced technological change in moderate and fragmented climate change mitigation regimes  

Science Journals Connector (OSTI)

Abstract Climate change mitigation efforts are currently characterized by a lack of globally coordinated measures and predominantly moderate regional action. This paper compares the results from different Integrated Assessment Models to analyze the impact of such moderate climate change mitigation actions on electricity technology deployment and development, along with the impact of first movers taking stringent unilateral action-specifically, the EU and an EU-plus-China coalition. We find that a fragmented regime with moderate climate and technology targets produces significant emission reductions and changes in the adoption of electricity technologies towards low-carbon alternatives, promoting global technology change. The adoption of more stringent policies by the first movers implies a further transformation of their electricity sectors, but technology deployment outside the coalition is not significantly affected. Furthermore, the results in some models show (1) that first movers can benefit from early action by increased access to low-carbon energy carriers and (2) that delayed action implies the lock-in of carbon-intensive technologies leading to a slower transformation of the electricity sector later.

Adriana Marcucci; Hal Turton

2013-01-01T23:59:59.000Z

138

Double hadron lepto-production in the current and target fragmentation regions  

E-Print Network [OSTI]

We study the inclusive production of two hadrons in deep inelastic processes, l N ---> l h_1 h_2 X, with h_1 in the current fragmentation region (CFR) and h_2 in the target fragmentation region (TFR). Assuming a factorized scheme, the recently introduced polarized and transverse momentum dependent fracture functions couple to the transverse momentum dependent fragmentation functions. This allows the full exploration of the fracture functions for transversely polarized quarks. Some particular cases are considered.

Mauro Anselmino; Vincenzo Barone; Aram Kotzinian

2011-09-06T23:59:59.000Z

139

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

140

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

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

Affective objectives in a programming languages course  

Science Journals Connector (OSTI)

This paper discusses the use of affective objectives in upper-level computer science courses. The use of affective objectives can enrich student experiences, support student motivation, and enhance the achievement of the cognitive objectives. The paper ... Keywords: BNF, affective objectives, internalization, memory models, parameter passing, programming languages, syntax diagrams, value

David Langan; Leo F. Denton; Dawn McKinney

2005-03-01T23:59:59.000Z

142

Electron–ion coincidences studies of the fragmentation of thiophene and of tetrahydrothiophene upon core ionization  

Science Journals Connector (OSTI)

We have measured the fragment ion spectra of thiophene and tetrahydrothiophene in coincidence with selected Auger final states following the ionization of a S 2p or C 1s core electron. Contrary to our earlier observations for diatomic and triatomic molecules for thiophene and tetrahydrothiophene the fragmentation is quite unselective to the extent that many of the fragmentation channels are open immediately at the Auger threshold. Moreover the kinetic energy released in the fragmentation is largely independent of the energy of the Auger final state.

Robert G. Hayes; Wolfgang Eberhardt

1991-01-01T23:59:59.000Z

143

Electron--ion coincidences studies of the fragmentation of thiophene and of tetrahydrothiophene upon core ionization  

SciTech Connect (OSTI)

We have measured the fragment ion spectra of thiophene and tetrahydrothiophene in coincidence with selected Auger final states following the ionization of a S 2{ital p} or C 1{ital s} core electron. Contrary to our earlier observations for diatomic and triatomic molecules, for thiophene and tetrahydrothiophene the fragmentation is quite unselective to the extent that many of the fragmentation channels are open immediately at the Auger threshold. Moreover, the kinetic energy released in the fragmentation is largely independent of the energy of the Auger final state.

Hayes, R.G. (Department of Chemistry, University of Notre Dame, Notre Dame, Indiana 46556 (US)); Eberhardt, W. (KFA Juelich, IEE-IFF, Postfach 1913, D5170 Juelich, Federal Republic of Germany (DE))

1991-01-01T23:59:59.000Z

144

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...

145

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

146

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

147

Mechanistic Insight into Fragmentation Reactions of Titanapinacolate Complexes  

Science Journals Connector (OSTI)

Reactions between terminal alkynes or aromatic ketones and titanapinacolate complexes (DMSC)Ti(OCAr2CAr2O) (2, Ar = Ph, and 3, Ar = p-MeC6H4; DMSC = 1,2-alternate dimethylsilyl-bridged p-tert-butylcalix[4]arene dianion) occur via rupture of the C?C bond of the titanacycle. ... Analysis of the kinetics of the reaction of (DMSC)Ti{OC(p-MeC6H4)2C(p-MeC6H4)2O} (3) with ButC?CH revealed that the fragmentation reactions proceed via a preequilibrium mechanism, involving reversible dissociation of titanapinacolate complexes into (DMSC)Ti(?2-OCAr2) species with release of a ketone molecule, followed by rate-limiting reaction of (DMSC)Ti(?2-OCAr2) species with an alkyne or ketone molecule. ... We recently reported the synthesis of titanapinacolate complexes (DMSC)Ti(OCAr2CAr2O) (2, Ar = Ph, and 3, Ar = p-MeC6H4; DMSC = 1,2-alternate dimethylsilyl-bridged p-tert-butylcalix[4]arene dianion, eq 1).5 Structural characterization of 2 by X-ray crystallography revealed that the unit cell contained two independent molecules and that the OCPh2CPh2O fragment of each molecule possessed an unusually long C?C bond [1.628(6) and 1.652(5) Å].5 Whether this rather peculiar structural feature portends intriguing reaction chemistry for titanapinacolate complexes 2 and 3 was of interest to us, especially since 2 and 3 are titanium derivatives of V (Scheme 1). ...

Jesudoss V. Kingston; Oleg V. Ozerov; Sean Parkin; Carolyn P. Brock; Folami T. Ladipo

2002-09-20T23:59:59.000Z

148

Factors Affecting Radiation Dose from a Hypothetical Extrusive Volcanic Event at Yucca Mountain, Nevada  

SciTech Connect (OSTI)

This paper describes the factors that could affect doses to the reasonably maximally exposed individual (RMEI) as a result of a hypothetical extrusive igneous event at Yucca Mountain. Based on available information, there is no evidence that most of the spent fuel in waste packages intersected by a volcanic conduit would be reduced to fine-grained material and subsequently erupted as volcanic ash. (authors)

Weiner, R. [U. S. NRC Advisory Committee on Nuclear Waste and Materials, Rockville, MD (United States); Coleman, N. [U.S. Nuclear Regulatory Commission, Rockville, MD (United States)

2008-07-01T23:59:59.000Z

149

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

150

Abstract SY05-02: Targeting kinases with reversible covalent fragments  

Science Journals Connector (OSTI)

...sweet spot in electrophile space could form the basis of a fragment-based...methods to screen large virtual libraries of electrophilic fragments. We designed a pilot virtual library of 13,000 cyanoacrylamide...A virtual screen of this library rapidly led to novel inhibitors...

Jack Taunton

2014-10-01T23:59:59.000Z

151

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

152

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.

153

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.

154

Lithic Fragments In The Bandelier Tuff, Jemez Mountains, New Mexico | Open  

Open Energy Info (EERE)

Lithic Fragments In The Bandelier Tuff, Jemez Mountains, New Mexico Lithic Fragments In The Bandelier Tuff, Jemez Mountains, New Mexico Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Lithic Fragments In The Bandelier Tuff, Jemez Mountains, New Mexico Details Activities (2) Areas (1) Regions (0) Abstract: Lithic fragments are a highly varied but significant component of the Bandelier Tuff, Jemez Mountains, New Mexico. Lithic material occurs in concentrations from trace amounts to 30 wt.%, and within the Otowi Member of the tuff has a total volume of 10 km3. Approximately 90% of the fragments are Cenozoic volcanic rocks of the Jemez volcanic field, 10% are Paleozoic sedimentary rocks, and only trace amounts are Precambrian basement. The large volume of lithic material and predominance of shallowly

155

The impact of homologous recombination repair deficiency on depleted uranium clastogenicity in Chinese hamster ovary cells: XRCC3 protects cells from chromosome aberrations, but increases chromosome fragmentation  

Science Journals Connector (OSTI)

Abstract Depleted uranium (DU) is extensively used in both industry and military applications. The potential for civilian and military personnel exposure to DU is rising, but there are limited data on the potential health hazards of DU exposure. Previous laboratory research indicates DU is a potential carcinogen, but epidemiological studies remain inconclusive. DU is genotoxic, inducing DNA double strand breaks, chromosome damage and mutations, but the mechanisms of genotoxicity or repair pathways involved in protecting cells against DU-induced damage remain unknown. The purpose of this study was to investigate the effects of homologous recombination repair deficiency on DU-induced genotoxicity using RAD51D and XRCC3-deficient Chinese hamster ovary (CHO) cell lines. Cells deficient in XRCC3 (irs1SF) exhibited similar cytotoxicity after DU exposure compared to wild-type (AA8) and XRCC3-complemented (1SFwt8) cells, but DU induced more break-type and fusion-type lesions in XRCC3-deficient cells compared to wild-type and XRCC3-complemented cells. Surprisingly, loss of RAD51D did not affect DU-induced cytotoxicity or genotoxicity. DU induced selective X-chromosome fragmentation irrespective of RAD51D status, but loss of XRCC3 nearly eliminated fragmentation observed after DU exposure in wild-type and XRCC3-complemented cells. Thus, XRCC3, but not RAD51D, protects cells from DU-induced breaks and fusions and also plays a role in DU-induced chromosome fragmentation.

Amie L. Holmes; Kellie Joyce; Hong Xie; Carolyne Falank; John M. Hinz; John Pierce Wise Sr.

2014-01-01T23:59:59.000Z

156

Migratory birds affect stability of intertidal sediments.  

Science Journals Connector (OSTI)

An ecological cascade effect: Migratory birds affect stability of ... tion) effect changes in coastal and estuarine .... ship would be expected if the cohesion was.

1999-12-22T23:59:59.000Z

157

The vacuum system for the Munich fission fragment accelerator  

Science Journals Connector (OSTI)

The Munich Accelerator for Fission Fragments (MAFF) is a radioactive ion beam facility which will be installed at the new research reactor FRM-II. This new reactor became critical in Spring 2004. The heart of MAFF, the target-ion source unit will be placed in the through-going beam tube of the FRM-II. This beam tube has been installed, tested and filled with helium in 2001. The cogent authorization procedures and safety levels developed for nuclear power plants are applied for this research reactor also. Therefore, MAFF also has to obey these very strict rules, because the typical 1 g load of 235U in the MAFF source creates a fission product activity of several 1014 Bq after one reactor cycle of 52 days. All vacuum components must withstand a pressure of 6×105 Pa in addition to their UHV acceptability. Even dynamic gaskets must be strictly metallic, because organic compounds would not withstand the radioactive irradiation during the design lifetime of 30 years. Only dry vacuum pumps are suitable: refrigerator cryopumps for the high-vacuum part and five stages of roots pumps for roughing and regeneration.

P. Maier-Komor; T. Faestermann; R. Krücken; F. Nebel; S. Winkler; M. Groß; D. Habs; O. Kester; J. Szerypo; P.G. Thirolf

2006-01-01T23:59:59.000Z

158

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

159

Pressure Swing Absorption Device and Process for Separating CO2 from Shifted Syngas and its Capture for Subsequent Storage  

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

Pressure Swing Absorption Device and Pressure Swing Absorption Device and Process for Separating CO 2 from Shifted Syngas and its Capture for Subsequent Storage Background Pulverized coal-fired power plants provide more than 50 percent of electricity needs while accounting for a third of the total carbon dioxide (CO 2 ) emissions in the United States. However, capturing CO 2 from the flue gas stream in coal-fired power plants using current commercial CO 2 capture technology could consume up

160

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

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161

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

162

Radiation-generated Short DNA Fragments May Perturb Non-homologous End-joining and Induce Genomic Instability  

Science Journals Connector (OSTI)

......itatively similar to the observations obtained with synthetic DNA fragments, supporting the importance of DNA size dependency...were qualitatively similar to those stimulated by short synthetic DNA fragments, supporting the importance of DNA size dependency......

Dalong Pang; Thomas A. Winters; Mira Jung; Shubhadeep Purkayastha; Luciane R. Cavalli; Sergey Chasovkikh; Bassem R. Haddad; Anatoly Dritschilo

2011-05-01T23:59:59.000Z

163

Changes in target fragmentation mechanisms with increasing projectile energy in intermediate energy nuclear collisions  

Science Journals Connector (OSTI)

We have measured the target fragment production cross sections and angular distributions for the interaction of 16 MeV/nucleon S32, 32 MeV/nucleon Ar40, and 44 MeV/nucleon Ar40 with Au197. We have deduced the fragment isobaric yield distributions and moving frame angular distributions from these data. The fission cross sections decrease with increasing projectile energy and the heavy residue cross sections (which are much larger than previous counter measurements) increase. There is an unusual change in the fragment isobaric yield distributions in the reactions induced by 32 MeV/nucleon Ar40 and 44 MeV/nucleon Ar40. We have used the symmetry properties of the moving frame distributions to show the relative time scale of the reaction mechanisms involved. The fission fragments associated with the peripheral collision peak in the folding angle distribution originate in a normal, slow fission process in which statistical equilibrium has been established. At the two lowest projectile energies, the fission fragments associated with the central collision peak in the folding angle distribution originate in part in fast, nonequilibrium processes. At the highest projectile energies, there are no fission fragments associated with high-momentum-transfer events. The intermediate mass fragments originate primarily in events in which statistical equilibrium has not been established.

W. Loveland; K. Aleklett; L. Sihver; Z. Xu; C. Casey; D. J. Morrissey; J. O. Liljenzin; M. de Saint-Simon; G. T. Seaborg

1990-03-01T23:59:59.000Z

164

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

165

Light Fragment Production and Power Law Behavior in Au + Au Collisions  

Science Journals Connector (OSTI)

Using charged-particle-exclusive measurements of Au+Au collisions in the LBL Bevalac's EOS time projection chamber, we investigate momentum-space densities of fragments up to 4He as a function of fragment transverse momentum, azimuth relative to the reaction plane, rapidity, multiplicity, and beam energy. Most features of these densities above a transverse momentum threshold are consistent with momentum-space coalescence, and, in particular, the increase in sideward flow with fragment mass is generally well described by a momentum-space power law.

S. Wang et al. (EOS Collaboration)

1995-04-03T23:59:59.000Z

166

Predictions for D*± photoproduction at DESY HERA with new fragmentation functions from CERN LEP 1  

Science Journals Connector (OSTI)

We present new sets of nonperturbative fragmentation functions for D*± mesons, both at leading and next-to-leading order in the MS¯ factorization scheme with five massless quark flavors. They are determined by fitting the latest OPAL and ALEPH data on inclusive D*± production in e+e- annihilation. We take the charm-quark fragmentation function to be of the form proposed by Peterson et al. and thus obtain new values of the ?c parameter, which are specific for our choice of factorization scheme. With these fragmentation functions, recent data on inclusive D*± photoproduction in ep collisions at DESY HERA are reasonably well reproduced.

J. Binnewies, B. A. Kniehl, and G. Kramer

1998-06-05T23:59:59.000Z

167

Relativistic corrections to heavy quark fragmentation to S-wave heavy mesons  

Science Journals Connector (OSTI)

The relativistic corrections of order v2 to the fragmentation functions for the heavy quark to S-wave heavy quarkonia are calculated in the framework of the nonrelativistic quantum chromodynamics factorization formula. We derive the fragmentation functions by using the Collins-Soper definition in both the Feynman gauge and the axial gauge. We also extract them through the process Z0?Hqq¯ in the limit MZ/m??. We find that all results obtained by these two different methods and in different gauges are the same. We estimate the relative size of the relativistic corrections to the fragmentation functions.

Wen-long Sang, Lan-fei Yang, and Yu-qi Chen

2009-07-23T23:59:59.000Z

168

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

Science Journals Connector (OSTI)

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

Saha, S.

2008-02-19T23:59:59.000Z

169

An idealized molecular geometry library for refinement of poorly behaved molecular fragments with constraints  

Science Journals Connector (OSTI)

An idealized molecular geometry library has been created as a web site to be used for refinement of difficult structures with constrained fragment geometries. The library application is illustrated with a practical example.

Guzei, I.A.

2014-03-28T23:59:59.000Z

170

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

171

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

172

Accumulation and Distribution of Uranium in Rats after Implantation with Depleted Uranium Fragments  

Science Journals Connector (OSTI)

......Rats after Implantation with Depleted Uranium Fragments Guoying Zhu 1 * Mingguang...and distribution of uranium in depleted uranium (DU) implanted rats. Materials...of chronic exposure to DU. Depleted uranium|Bone|Kidney|Distribution......

Guoying Zhu; Mingguang Tan; Yulan Li; Xiqiao Xiang; Heping Hu; Shuquan Zhao

2009-05-01T23:59:59.000Z

173

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

174

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

175

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

176

Origin of the narrow, single peak in the fission-fragment mass distribution for 258Fm  

SciTech Connect (OSTI)

We discuss the origin of the narrowness of the single peak at mass-symmetric division in the fragment mass-yield curve for spontaneous fission of {sup 258}Fm. For this purpose, we employ the macroscopic-microscopic model and calculate a potential-energy curve at the mass-symmetric compact scission configuration, as a function of the fragment mass number, which is obtained from the single-particle wave-function densities. In the calculations, we minimize total energies by varying the deformations of the two fragments, with constraints on the mass quadrupole moment, and by keeping the neck radius zero. The energies thus become functions of mass asymmetry. Using the obtained potential, we solve the one-dimensional Schroedinger equation with a microscopic coordinate-dependent inertial mass to calculate the fragment mass-yield curve. The calculated mass yield, expressed in terms of the microscopic mass density, is consistent with the extremely narrow experimental mass distribution.

Moller, Peter [Los Alamos National Laboratory; Ickhikawa, Takatoshi [RIKEN; Iwamoto, Akira [JAEA

2008-01-01T23:59:59.000Z

177

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

178

FEMP Releases AFFECT Funding Opportunity Announcement  

Broader source: Energy.gov [DOE]

On November 5, 2013, the Federal Energy Management Program (FEMP) issued a Funding Opportunity Announcement (FOA) on the EERE Exchange titled "Assisting Federal Facilities with Energy Conservation Technologies (AFFECT)."

179

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

180

Energy loss of nuclear fragments in partially ionized materials of high atomic number  

Science Journals Connector (OSTI)

Methods used for the computation of the stopping power of high-atomic-number media to light and heavy nuclear fragments in un-ionized and completely ionized states are reasonably well developed. This is not the case for partially ionized states. We propose a method that bridges these two extremes and discuss applications of the method to ? particles and fission fragments in uranium at extreme temperatures and densities.

R. A. Lewis; G. A. Smith; W. S. Toothacker

1991-07-01T23:59:59.000Z

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

A logarithmic, large-solid-angle detector telescope for nuclear fragmentation  

SciTech Connect (OSTI)

Properties of a logarithmic, large-solid-angle detector telescope for measuring the spectra of light charged particles and/or complex fragments produced in intermediate-energy nuclear reactions are described. Light-ion identification with a phoswich detector which consists of transmission photodiode {Delta}E and CsI(T{ell}) E elements is also discussed, as is the response of silicon microstrip detectors to fission fragments. 6 figs., 4 figs.

Kwiatkowski, K.; Komisarcik, K.; Wile, J.L.; Yennello, S.J.; Fields, D.E.; Viola, V.E. (Indiana Univ., Bloomington, IN (USA)); Glagola, B.G. (Argonne National Lab., IL (USA))

1990-01-01T23:59:59.000Z

182

Large pT from the fragmentation of 1.2-GeV/nucleon La139 nuclei  

Science Journals Connector (OSTI)

The first measurements of the transverse momenta (pT) of heavy projectile fragments produced by fragmentation of 1.2-GeV/nucleon La are presented. The momentum distributions of the fragments (Z?26–56) are Gaussians and broader than predicted by models based on internal momenta of the projectile nucleons. The larger pT observed do not appear to be due solely to Coulomb effects, but are consistent with a simple model whereby nucleons from the (hot) overlap region recoil collectively into the (colder) projectile fragments. Thus, pT and the fragment mass may provide a good indication of the vector impact parameter b.

F. P. Brady; W. B. Christie; J. L. Romero; C. E. Tull; B. McEachern; M. L. Webb; J. C. Young; H. J. Crawford; D. E. Greiner; P. J. Lindstrom; H. Sann

1988-04-25T23:59:59.000Z

183

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

184

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

185

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

186

Specific amino acid substitutions in bacterioopsin: replacement of a restriction fragment in the structural gene by synthetic DNA fragments containing altered codons  

SciTech Connect (OSTI)

To study the mechanism of light-dependent proton translocation by bacteriorhodopsin, we have introduced single-codon changes in the gene so as to produce the following specific amino acid substitutions in the protein: Tyr-185 to Phe, Pro-186 to Leu, Trp-189 to Phe, Ser-193 to Ala, and Glu-194 to Gln. The strategy involved replacement of a 62-base-pair restriction fragment by synthetic DNA duplexes containing the modified nucleotide sequences. This required a unique restriction site (Xho I) at Ile-203 which was created by oligonucleotide-directed point mutagenesis. The six DNA duplexes corresponding to the modified native and mutant restriction fragments were all prepared by DNA ligase-catalyzed joining of chemically synthesized deoxyribooligonucleotides. The bacterioopsin expression plasmids reconstructed by using the synthetic DNA fragments were characterized by restriction analysis and DNA sequence determination. An extremely rapid, efficient, and general method for purification of the synthetic oligonucleotides and of DNA fragments was developed. 32 references, 6 figures.

Lo, K.M.; Jones, S.S.; Hackett, N.R.; Khorana, H.G.

1984-04-01T23:59:59.000Z

187

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

188

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

189

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

190

The Minimum Mass for Opacity-Limited Fragmentation in Turbulent Cloud Cores  

E-Print Network [OSTI]

We present a new analysis of the minimum mass for star formation, based on opacity-limited fragmentation. Our analysis differs from the standard one, which considers hierarchical fragmentation of a 3-D medium, and yields $M_{_{\\rm MIN}} \\sim 0.007 {\\rm to} 0.010 M_\\odot$ for Population I star formation. Instead we analyse the more realistic situation in which there is one-shot fragmentation of a shock-compressed layer, of the sort which arises in turbulent star-forming clouds. In this situation, $M_{_{\\rm MIN}}$ can be smaller than $0.003 M_\\odot$. Our analysis is more stringent than the standard one in that (a) it requires fragments to have condensation timescales shorter than all competing mass scales, and (b) it takes into acount that a fragment grows by accretion whilst it is condensing out, and has to radiate away the energy dissipated in the associated accretion shock. It also accords with the recent detection, in young star clusters, of free-floating star-like objects having masses as low as $0.003 {\\rm M}_\\odot$.

D. F. A. Boyd; A. P. Whitworth

2004-11-17T23:59:59.000Z

191

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

192

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

193

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

194

Factors Affecting PMU Installation Costs (October 2014)  

Broader source: Energy.gov [DOE]

The Department of Energy investigated the major cost factors that affected PMU installation costs for the synchrophasor projects funded through the Recovery Act Smart Grid Programs. The data was compiled through interviews with the nine projects that deployed production grade synchrophasor systems.

195

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

196

Complex fragment emission in binary and multifragment decay of very hot nuclear systems  

SciTech Connect (OSTI)

Low-energy compound nucleus emission of complex fragments in the reaction {sup 63}Cu + {sup 12}C is used to infer the associated ridge-line potential. Compound binary emission of complex fragments at higher energies is illustrated for a variety of reactions. Complex fragment emission from 35 and 40 MeV/N {sup 139}La + {sup 12}C, {sup 27}Al, {sup 40}Ca and {sup 51}V reactions has been studied. Multifragment events from these reactions were assigned to sources characterized by their energy and mass through the incomplete-fusion-model kinematics. Excitation functions for the various multifragment channels appear to be nearly independent of the system and bombarding energy. Preliminary comparisons of the data with sequential-statistical-decay calculations are discussed.

Moretto, L.G.; Blumenfeld, Y.; Delis, D.; Wozniak, G.J.

1990-07-01T23:59:59.000Z

197

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

198

Absence of entrance channel effects in fission fragment anisotropies of the Fr215 compound nucleus  

Science Journals Connector (OSTI)

Fission fragment angular distributions have been measured for the reactions B11+Pb204 and O18+Au197, both leading to the same compound nucleus Fr215 at near barrier energies. The measured fission fragment anisotropies as a function of Ec.m./VB are found to be consistent with the predictions of the standard saddle point statistical model (SSPM) for both the systems, suggesting the absence of entrance channel effects on fission fragment anisotropies even though the entrance channel mass asymmetries for both these systems fall on either side of the Bussinaro-Gallone critical mass asymmetry. The consistency of the present results with SSPM predictions can be understood within the framework of the pre-equilibrium fission model where fission before K equilibration is severely inhibited by the high values of ratios of fission barrier height to nuclear temperature.

S. Appannababu; S. Mukherjee; N. L. Singh; P. K. Rath; G. Kiran Kumar; R. G. Thomas; S. Santra; B. K. Nayak; A. Saxena; R. K. Choudhury; K. S. Golda; A. Jhingan; R. Kumar; P. Sugathan; Hardev Singh

2009-08-12T23:59:59.000Z

199

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

200

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

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

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

202

Variables Affecting Economic Development of Wind Energy  

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

Variables Affecting Economic Variables Affecting Economic Development of Wind Energy E. Lantz and S. Tegen National Renewable Energy Laboratory Presented at WINDPOWER 2008 Houston, Texas June 1-4, 2008 Conference Paper NREL/CP-500-43506 July 2008 NREL is operated by Midwest Research Institute ● Battelle Contract No. DE-AC36-99-GO10337 NOTICE The submitted manuscript has been offered by an employee of the Midwest Research Institute (MRI), a contractor of the US Government under Contract No. DE-AC36-99GO10337. Accordingly, the US Government and MRI retain a nonexclusive royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for US Government purposes. This report was prepared as an account of work sponsored by an agency of the United States government.

203

1995 Reformulated Gasoline Market Affected Refiners Differently  

Gasoline and Diesel Fuel Update (EIA)

5 Reformulated Gasoline Market Affected 5 Reformulated Gasoline Market Affected Refiners Differently by John Zyren, Charles Dale and Charles Riner Introduction The United States has completed its first summer driving season using reformulated gasoline (RFG). Motorists noticed price increases at the retail level, resulting from the increased cost to produce and deliver the product, as well as from the tight sup- ply/demand balance during the summer. This arti- cle focuses on the costs of producing RFG as experienced by different types of refiners and on how these refiners fared this past summer, given the prices for RFG at the refinery gate. RFG Regulatory Requirements The use of RFG is a result of the Clean Air Act Amendments of 1990 (CAAA). The CAAA cover a wide range of programs aimed at improving air qual-

204

Commercial Building HVAC: How it Affects People  

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

Commercial Building HVAC: How it Affects People Commercial Building HVAC: How it Affects People Speaker(s): William Fisk Date: November 13, 2000 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: David Faulkner Commercial building heating, ventilating, and air conditioning (HVAC) systems are designed primarily to maintain a reasonable level of thermal comfort while limiting first costs and energy consumption. However, research conducted predominately within the last decade suggests that commercial building HVAC significantly influences human outcomes other than thermal comfort, including the health, satisfaction, and work performance of the building's occupants. This presentation will review the relationships of these outcomes with HVAC system type, filtration system efficiency, indoor air temperature, and outside air ventilation rate.

205

Ambient Airborne Solids Concentrations Including Volcanic Ash at Hanford, Washington Sampling Sites Subsequent to the Mount St. Helens Eruption  

SciTech Connect (OSTI)

A major eruption of Mount St. Helens occurred on May 18, 1980. Subsequently, airborne solid concentrations were measured as a function of time at two sites within the southern edge of the fallout plume about 211 km east of Mount St. Helens. This ash was a source for investigating area-wide resuspension. Rain had a variable effect on decreasing airborne concentrations from resuspension. From 0.5 to 1.5 cm of rain were required to significantly reduce airborne solid concentrations through July. For a more aged resuspension source in September, a rain of 2.0 cm had a negligible effect. A monthly average threshold-wind speed for resuspension was defined as 3.6 m/s. For monthly-average wind speeds less than the threshold wind speed, monthly-average airborne concentrations tended to decrease with time. A decrease was recorded between September and October. For this 4-month time period, the half-life was on the order of 50 days, corresponding to a weathering rate of 5.1 year/sup -1/.

Sehmel, G.A.

1982-12-20T23:59:59.000Z

206

Financial Incentives Available for Facilities Affected by the...  

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

Financial Incentives Available for Facilities Affected by the US EPA Boiler MACT Proposed Rule, December 2012 Financial Incentives Available for Facilities Affected by the US EPA...

207

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...

208

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

209

Competition between adsorbate fragmentation and desorption on laser-heated surfaces  

E-Print Network [OSTI]

Competition between adsorbate fragmentation and desorption on laser-heated surfaces FL V. Weaver adsorbate-substrate system. The adsorbate in this study contains one weak bond and a number of strong bonds molecules adsorbed on heated surfaces. Among the numerous interesting results of these experiments

Zeiri, Yehuda

210

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

211

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

212

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.

213

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

214

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

215

Development of position-sensitive time-of-flight spectrometer for fission fragment research  

E-Print Network [OSTI]

A position-sensitive, high-resolution time-of-flight detector for fission fragments has been developed. The SPectrometer for Ion DEterminiation in fission Research (SPIDER) is a $2E-2v$ spectrometer designed to measure the mass of light fission fragments to a single mass unit. The time pick-off detector pairs to be used in SPIDER have been tested with $\\alpha$-particles from $^{229}$Th and its decay chain and $\\alpha$-particles and spontaneous fission fragments from $^{252}$Cf. Each detector module is comprised of a thin electron conversion foil, electrostatic mirror, microchannel plates, and delay-line anodes. Particle trajectories on the order of 700 mm are determined accurately to within 0.7 mm. Flight times on the order of 70 ns were measured with 200 ps resolution FWHM. Computed particle velocities are accurate to within 0.06 mm/ns corresponding to precision of 0.5%. An ionization chamber capable of 400 keV energy resolution coupled with the velocity measurements described here will pave the way for modestly efficient measurements of light fission fragments with unit mass resolution.

C. W. Arnold; F. Tovesson; K. Meierbachtol; T. Bredeweg; M. Jandel; H. J. Jorgenson; A. Laptev; G. Rusev; D. W. Shields; M. White; R. E. Blakeley; D. M. Mader; A. A. Hecht

2014-03-06T23:59:59.000Z

216

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

217

Linear Scaling 3D Fragment Method for Large-scale Electronic Structure Calculations  

E-Print Network [OSTI]

Linear Scaling 3D Fragment Method for Large-scale Electronic Structure Calculations Lin-Wang Wang) allocation time in the materials science category [1]. DFT codes can be used to calculate the electronic theory (DFT) calculations for large systems. This method cancels out the artificial boundary effects

218

Re-connecting native ecosystems across a fragmented 2 PhD programs  

E-Print Network [OSTI]

and motivated candidates for two PhD programs of research on ecological restoration in the fragmented temperate will undertake multi-tiered ecological monitoring designed to quantify short-term biodiversity benefits after and accommodation expenses, a 4WD vehicle will be available as needed, and occasional assistance by a casual

Botea, Adi

219

An Automatic Assembly and Completion Framework for Fragmented Skulls Zhao Yin1,2  

E-Print Network [OSTI]

and Technology Louisiana State University Email: xinli@lsu.edu Abstract We develop a completion pipeline. The proposed assembly and completion algo- rithms can also be used to repair other fragmented objects-curves. The assembled skull is finally re- paired by a symmetry-based completion algorithm. Exper- iments on repairing

Li, Xin "Shane"

220

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

2007-01-23T23:59:59.000Z

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.


221

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

222

Is climate change affecting human health?  

Science Journals Connector (OSTI)

First principles suggest that climate change is affecting human health, based on what is understood about the relationships between the mean and variability of temperature, precipitation, and other weather variables and climate-sensitive health outcomes, and the magnitude of climate change that has occurred. However, the complexity of these relationships and the multiple drivers of climate-sensitive health outcomes makes the detection and attribution of changing disease patterns to climate change very challenging. Nevertheless, efforts to do so are vital for informing policy and for prioritizing adaptation and mitigation options.

Kristie L Ebi

2013-01-01T23:59:59.000Z

223

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

224

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

225

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

E-Print Network [OSTI]

of incident neutron energy measured in a lead slowing-down spectrometer C. Romano,1 Y. Danon,1,* R. Block,1 J; published 19 January 2010) A new method of measuring fission fragment mass and energy distributions to measure the neutron-induced fission cross section and fragment mass and energy distributions of 25.3 ± 0

Danon, Yaron

226

FCV Learning Demonstration: Factors Affecting Fuel Cell Degradation (Presentation)  

SciTech Connect (OSTI)

Presentation on factors affecting fuel cell degradation in the DOE Fuel Cell Vehicle learning demonstation.

Kurtz, J.; Wipke, K.; Sprik, S.

2007-11-15T23:59:59.000Z

227

Effects of fluoride and polymeric additives on the dissolution of calcite and the subsequent formation of fluorite  

Science Journals Connector (OSTI)

Abstract Fluoride is a problematic contaminant of the ground water arising from both natural and man-made origins. In this report, the fluoride uptake by calcite (calcium carbonate) was examined with emphasis on the effects of model organic compounds (polymers) and the possible adhesion of fluorite (calcium fluoride) on calcite. The primary route of the fluoride removal was fluorite formation through dissolution-and-recrystallization. While all model polymers affected the kinetics of fluorite formation, the positively charged poly(ethylene imine) had the most inhibiting influence. The observation of the calcite single crystals using atomic force microscopy revealed that the inhibitory effect was attributed to the retarded diffusion of fluoride to the calcite surface, which was also in accordance with the analysis of bulk experiments with calcite powders. It was also found that the oriented growth of fluorite was induced on the calcite (1 0 4) surface probably by the epitaxy with the (1 2 0) plane of fluorite. The current results could be of critical implications in the process design of fluoride removal by considering organic interferences and minimizing the need of flocculation step.

Taewook Yang; Wansoo Huh; Jae Young Jho; Il Won Kim

2014-01-01T23:59:59.000Z

228

Collective flow by the azimuthal correlation of projectile fragments in relativistic heavy-ion collisions  

Science Journals Connector (OSTI)

An analysis that does not require the determination of reaction plane on an event-by-event basis, and involves only azimuthal correlation function of the projectile fragment pairs, has been employed to measure the collective flow of nuclear matter. Using this technique, we study the flow of projectile fragments of charge Z?2 produced in Au197 induced-emulsion reactions at 10.6A GeV. The collective flow is observed to be the most pronounced in semicentral collisions. The results are compared with those of Si28 at 14.5A GeV, U238 at 0.96A GeV, Kr84 at 1.52A GeV, and Fe56 at 1.7A GeV.

G. Singh and P. L. Jain

1994-06-01T23:59:59.000Z

229

Particle and light fragment emission in peripheral heavy ion collisions at Fermi energies  

E-Print Network [OSTI]

A systematic investigation of the average multiplicities of light charged particles and intermediate mass fragments emitted in peripheral and semiperipheral collisions is presented as a function of the beam energy, violence of the collision and mass of the system. The data have been collected with the "Fiasco" setup in the reactions 93Nb+93Nb at 17, 23, 30, 38AMeV and 116Sn+116Sn at 30, 38AMeV. The midvelocity emission has been separated from the emission of the projectile-like fragment. This last component appears to be compatible with an evaporation from an equilibrated source at normal density, as described by the statistical code Gemini at the appropriate excitation energy. On the contrary, the midvelocity emission presents remarkable differences for what concerns both the dependence of the multiplicities on the energy deposited in the midvelocity region and the isotopic composition of the emitted light charged particles.

S. Piantelli; P. R. Maurenzig; A. Olmi; L. Bardelli; A. Bartoli; M. Bini; G. Casini; C. Coppi; A. Mangiarotti; G. Pasquali; G. Poggi; A. A. Stefanini; N. Taccetti; E. Vanzi

2006-05-16T23:59:59.000Z

230

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

231

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

232

Conversion, Fragmentation,  

E-Print Network [OSTI]

.yale.edu/yff Issue Editors: Mary Tyrrell, Gary Dunning #12;YFFReview #12;Issue SummaryPage 3 | Contents Contents and forestland ownership patterns--have a distinct regional basis. On April 13th and 14th, 2000, the Yale Forest

233

Sources and characteristics of complex fragments in La-induced reactions  

SciTech Connect (OSTI)

Complex fragment emission has been studied for a variety of reactions at intermediate energies. Multifragment events are shown to be associated with specific sources characterized by their mass and excitation energy through the incomplete fusion model. Excitation functions for the different multifragment decay channels are found to be almost independent of the system and the incident energy. Preliminary comparisons of the data with dynamical calculations followed by statistical decay calculations are discussed. 11 refs., 7 figs.

Roussel-Chomaz, P.; Blumenfeld, Y.; Charity, R.; Colonna, M.; Colonna, N.; Libby, B.; Hanold, K.; Moretto, L.; Peaslee, G.; Wozniak, G.

1991-01-01T23:59:59.000Z

234

3.1-S Protein Fragment released from Reduced Wool by Trypsin  

Science Journals Connector (OSTI)

... yet permitted extensive (up to 50 per cent) digestion of reduced and rinsed Merino wool in 0.1 M Na2HPO4 solution at pH 8.0, trypsin : substrate ratio ... by trypsin. If, therefore, trypsin did release large protein molecules or aggregates from reduced wool which were still in the native structure, then re-oxidation of these fragments in ...

B. D. GREENWOOD; P. T. SPEAKMAN

1965-01-02T23:59:59.000Z

235

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

236

Statistical analysis of light fragment production from medium energy proton-induced reactions  

E-Print Network [OSTI]

The light fragment production reactions for 10 MeV to 3 GeV protons incident on O-16, Al-27, Fe, Nb-93, and Ag are analyzed by a combination of an intranuclear cascade model and a generalized evaporation model which includes light nuclei up to Mg as ejectiles. It is concluded that evaporation is the dominant process by which particles lighter than or equal to Be are produced from targets heavier than O.

S. Furihata

2000-03-15T23:59:59.000Z

237

Fission fragment mass distributions in reactions forming the Fr213 compound nucleus  

Science Journals Connector (OSTI)

The fission fragment mass angle correlations and mass ratio distributions have been investigated for the two systems O16+Au197 and Al27+W186, leading to the same compound nucleus Fr213 around the Coulomb barrier energies. Systematic analysis of the variance of the mass distributions as a function of temperature and angular momentum suggests true compound nuclear fission for both the reactions, indicating the absence of nonequilibrium fission processes.

S. Appannababu; S. Mukherjee; B. K. Nayak; R. G. Thomas; P. Sugathan; A. Jhingan; E. Prasad; D. Negi; N. N. Deshmukh; P. K. Rath; N. L. Singh; R. K. Choudhury

2011-03-10T23:59:59.000Z

238

Source properties of intermediate-mass fragments emitted in the reaction 14N+232Th at E/A=35 MeV  

Science Journals Connector (OSTI)

Triple coincidences between intermediate-mass fragments and angle-correlated binary fission events were measured in the at E/A=35 MeV. It was found that fragments emitted at backward angles appear to be associated with reactions in which nearly all ofthe projectile momentum is carried away by the heavy reaction residue and the intermediate-mass fragment. In contrast, fragments emitted at forward angles are accompanied by 20%–30% missing momentum.

M. Fatyga; K. Kwiatkowski; V. E. Viola; W. G. Wilson; M. B. Tsang; J. Pochodzalla; W. G. Lynch; C. K. Gelbke; D. J. Fields; C. B. Chitwood; Z. Chen; T. Nayak

1987-06-15T23:59:59.000Z

239

Momentum imaging spectrometer for molecular fragmentation dynamics induced by pulsed electron beam  

SciTech Connect (OSTI)

A momentum imaging spectrometer has been built for studying the electron impact molecular fragmentation dynamics. The setup consists of a pulsed electron gun and a time of flight system as well as a two-dimensional time and position sensitive multi-hit detector. The charged fragments with kinetic energy up to 10 eV can be detected in 4? solid angles and their three-dimensional momentum vectors can be reconstructed. The apparatus is tested by electron impact ionization of Ar and dissociative ionization of CO{sub 2}. By analyzing the ion-ion coincidence spectra, the complete and incomplete Coulomb fragmentation channels for CO{sub 2}{sup 2+} and CO{sub 2}{sup 3+} are identified. The kinetic energy release (KER) and angular correlation for the two-body breakup channel CO{sub 2}{sup 2+*}? O{sup +}+ CO{sup +} are reported. The peak value of total KER is found to be 6.8 eV which is consistent with the previous photoion-photoion coincidence studies, and the correlation angle of O{sup +} and CO{sup +} is also explicitly determined to be 172.5°.

Wang, EnLiang; Shan, Xu; Shi, YuFeng; Tang, YaGuo; Chen, XiangJun [Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)] [Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)

2013-12-15T23:59:59.000Z

240

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

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

Development of position-sensitive time-of-flight spectrometer for fission fragment research  

E-Print Network [OSTI]

A position-sensitive, high-resolution time-of-flight detector for fission fragments has been developed. The SPectrometer for Ion DEterminiation in fission Research (SPIDER) is a $2E-2v$ spectrometer designed to measure the mass of light fission fragments to a single mass unit. The time pick-off detector pairs to be used in SPIDER have been tested with $\\alpha$-particles from $^{229}$Th and its decay chain and $\\alpha$-particles and spontaneous fission fragments from $^{252}$Cf. Each detector module is comprised of a thin electron conversion foil, electrostatic mirror, microchannel plates, and delay-line anodes. Particle trajectories on the order of 700 mm are determined accurately to within 0.7 mm. Flight times on the order of 70 ns were measured with 200 ps resolution FWHM. Computed particle velocities are accurate to within 0.06 mm/ns corresponding to precision of 0.5%. An ionization chamber capable of 400 keV energy resolution coupled with the velocity measurements described here will pave the way for mode...

Arnold, C W; Meierbachtol, K; Bredeweg, T; Jandel, M; Jorgenson, H J; Laptev, A; Rusev, G; Shields, D W; White, M; Blakeley, R E; Mader, D M; Hecht, A A

2014-01-01T23:59:59.000Z

242

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

243

Coagulation, fragmentation and radial motion of solid particles in protoplanetary disks  

E-Print Network [OSTI]

The growth of solid particles towards meter sizes in protoplanetary disks has to circumvent at least two hurdles, namely the rapid loss of material due to radial drift and particle fragmentation due to destructive collisions. In this paper, we present the results of numerical simulations with more and more realistic physics involved. Step by step, we include various effects, such as particle growth, radial/vertical particle motion and dust particle fragmentation in our simulations. We demonstrate that the initial dust-to-gas ratio is essential for the particles to overcome the radial drift barrier. If this value is increased by a factor of 2 compared with the canonical value for the interstellar medium, km-sized bodies can form in the inner disk 30 m/s), particles are able to grow to larger sizes in low turbulent disks. We also find that less than 5% of the small dust grains remain in the disk after 1 Myrs due to radial drift, no matter whether fragmentation is included in the simulations or not. In this paper, we also present considerable improvements to existing algorithms for dust-particle coagulation, which speed up the coagulation scheme by a factor of 10 thousand.

F. Brauer; C. P. Dullemond; Th. Henning

2007-11-14T23:59:59.000Z

244

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

245

Assisting Federal Facilities with Energy Conservation Technologies (AFFECT) Funding Opportunity  

Broader source: Energy.gov [DOE]

FEMP provides project assistance through the Assisting Federal Facilities with Energy Conservation Technologies (AFFECT) funding opportunity. AFFECT provides grants for the development of capital projects to increase the energy efficiency and renewable energy investments at Federal agency facilities.

246

Enhanced Oil Recovery Affects the Future Energy Mix | GE Global...  

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

Affects the Future Energy Mix Enhanced Oil Recovery Affects the Future Energy Mix Trevor Kirsten 2012.11.19 One of the fascinating things about my job is contemplating questions...

247

Comparison of a reduced carbohydrate and reduced fat diet for LDL, HDL, and VLDL subclasses during 9-months of weight maintenance subsequent to weight loss  

E-Print Network [OSTI]

related to weight management. Additionally, participants followed a liquid very low-energy diet of ~2092 kJ per day for the first three months of the study. Subsequently, participants followed a dietary plan for nine months that targeted a reduced...

LeCheminant, James D.; Smith, Bryan K.; Westman, Eric C.; Vernon, Mary C.; Donnelly, Joseph E.

2010-06-01T23:59:59.000Z

248

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

249

Construction and expression of synthetic DNA fragments coding for polypeptides with elevated levels of essential amino acids  

Science Journals Connector (OSTI)

Polypeptides, with elevated levels of essential amino acids, could be useful as partial protein supplements to food and feeds. To obtain DNA fragments coding for these polymers, oligonucleotides were construct...

J. M. Jaynes; P. Langridge; K. Anderson; C. Bond…

1985-02-01T23:59:59.000Z

250

Abstract 1624: A fragment-based approach to the development of small-molecule STAT3 transcription factor inhibitors  

Science Journals Connector (OSTI)

...dimerization inhibition potential using an in-house fluorescent polarisation assay and a time-resolved fluorescent resonance energy transfer assay (TR-FRET), and their cytotoxicity in tumor cells was evaluated using a MTT assay. Interestingly, two fragments...

Kazi Sharmin Nahar; Christopher Chamberlain; Aanchal Grover; Paul Jackson; Khondaker M. Rahman; David E. Thurston

2014-10-01T23:59:59.000Z

251

Selection of Recombinant, Library-Derived Antibody Fragments against p24 for Human Immunodeficiency Virus Type 1 Diagnostics  

Science Journals Connector (OSTI)

...Selection of Recombinant, Library-Derived Antibody Fragments...application of combinatorial library technology, we generated the...From a light chain shuffling library, we selected a derivative...present in the periplasmic space of the producing bacteria by...

Hans J. W. de Haard; Bert Kazemier; Marck J. M. Koolen; Liekle J. Nijholt; Rob H. Meloen; Bob van Gemen; Hennie R. Hoogenboom; Jan-Willem Arends

1998-09-01T23:59:59.000Z

252

A Framework to Predict the Impacts of Shale Gas Infrastructures on the Forest Fragmentation of an Agroforest Region  

Science Journals Connector (OSTI)

We propose a framework to facilitate the evaluation of the impacts of shale gas infrastructures (well pads, roads, and pipelines ... an already fragmented forest cover and a high gas potential. The scenario with ...

Alexandre Racicot; Véronique Babin-Roussel…

2014-05-01T23:59:59.000Z

253

Among- and within-patch components of genetic diversity respond at different rates to habitat fragmentation: an empirical demonstration  

Science Journals Connector (OSTI)

...research-article Among- and within-patch components of genetic diversity respond...both these responses to decreased habitat patch connectivity (Soule 1972; Hanfling Brandl...effects of habitat fragmentation and habitat patch isolation, this phenomenon has not previously...

2005-01-01T23:59:59.000Z

254

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

255

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

256

Search for anomalous fragments in 1.8A-GeV Ar40 reactions in nuclear emulsions  

Science Journals Connector (OSTI)

Results are presented from an investigation of the mean free path in nuclear emulsion of multiply charged fragments, produced by 1.8A-GeV argon nuclei. Charge identification of 6965 fragments with charges Z?2, producing 2192 secondary interactions, has been made. No dependence of the mean free path on the distance from the preceding collision is observed and thus our result is consistent with the nonexistence of anomalons.

R. Bhanja et al.

1985-02-25T23:59:59.000Z

257

Perturbative QCD predictions for the fragmentation functions of the P-wave mesons with two heavy quarks  

Science Journals Connector (OSTI)

The fragmentation functions for the heavy mesons of S and P waves are calculated in the framework of perturbative QCD and the nonrelativistic quark model. The results are manifestly process independent. As applications, the production ratios for P-wave b¯c mesons to the bb¯ production at high energy colliders are predicted. The spin dependence of the fragmentation functions for various states is discussed and the predicted results for the D (D*) mesons are consistent with the recent experimental data.

Yu-Qi Chen

1993-12-01T23:59:59.000Z

258

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

259

Transverse Collective Flow and Emission Order of Mid-Rapidity Fragments in Fermi Energy Heavy Ion Collisions  

E-Print Network [OSTI]

TRANSVERSE COLLECTIVE FLOW AND EMISSION ORDER OF MID-RAPIDITY FRAGMENTS IN FERMI ENERGY HEAVY ION COLLISIONS A Dissertation by ZACHARY WAYNE KOHLEY Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of DOCTOR OF PHILOSOPHY August 2010 Major Subject: Chemistry TRANSVERSE COLLECTIVE FLOW AND EMISSION ORDER OF MID-RAPIDITY FRAGMENTS IN FERMI ENERGY HEAVY ION COLLISIONS A Dissertation by ZACHARY WAYNE KOHLEY Submitted...

Kohley, Zachary Wayne

2011-10-21T23:59:59.000Z

260

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.

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.


261

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

262

Developing Virtuous Soldiers: Mitigating the Problem of Fragmentation in the Army  

E-Print Network [OSTI]

self and personal moral self is made even greater. Combat and the Fragmentation of a Soldier?s Moral Self Some combat veterans find it more difficult to integrate their professional and personal moral selves after they return from deployment.... Consider the following quotation from a veteran of Afghanistan: Every day that passes, I find myself longing for the visceral reality that is combat. I can safely say it is only in those fleeting moments of a firefight that I?ve felt truly alive. In a...

Berghaus, Paul T

2013-07-16T23:59:59.000Z

263

Fragment Production in the Interaction of 5.5-GeV Protons with Uranium  

Science Journals Connector (OSTI)

The energy spectra of nuclear fragments produced by the interaction of 5.5-GeV protons with uranium have been determined at several laboratory angles by means of dEdx-E measurements with semiconductor-detector telescopes. Individual isotopes of the elements from hydrogen to carbon were resolved, and from nitrogen to argon the study was continued for the elements without isotopic separation. The evaporation-like energy spectra were integrated to obtain angular distributions and total cross sections for the isotopes of helium through carbon. Total cross sections for many rare isotopes were also estimated. The yield surface constructed from these cross sections has a ridge-like shape positioned one neutron in excess of the line of ? stability. The yields fall off more steeply on the neutron-deficient side and exhibit odd-even effects reflecting those of the mass surface. The energy spectra of the neutron-deficient isotopes differ from the others in that the high-energy parts of the spectra are more pronounced and flatter, and the angular distributions are more forward peaked.Some of the energy spectra were fitted with calculated curves based on the isotropic evaporation of fragments from a system moving along the beam axis. The apparent Coulomb barriers obtained from this analysis were about one half the nominal Coulomb barriers, and the apparent nuclear temperatures fell in the 10- to 13-MeV range. For the highest-energy fragments observed at 90° the apparent temperatures rose to 20 MeV. From the forward-backward shifts in energy it was deduced that the average velocity of the moving system is about 0.006c and that there is a positive correlation between this velocity and the velocity of the fragments in the moving system. However, all of the data are more peaked forward in intensity than can be explained by this simple two-step model.Radiochemical cross sections are also presented for the production of Be7 from uranium, silver, and aluminum, and for Na22 from aluminum.

A. M. Poskanzer; Gilbert W. Butler; Earl K. Hyde

1971-02-01T23:59:59.000Z

264

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

E-Print Network [OSTI]

is required (Nei et al. 1975). Ayala (1968) stated that 14 populations with greater genetic variability are more efficient in adapting to a new or changing environment. He showed this by producing hybrid populations of 2 strains of Drosophila, D. serrata... "? 4. 7 24 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Taq I 2. 1 50 at 4. 9kb, where 1 desert bighorn NV/TX and 3 desert bighorn AZ/AZ exhibited a doublet below 4. 9kb, and 1 desert bighorn NV/TX exhibited a fragment above 4. 9kb. Bovine...

Lyles, Ingrid Doodeheefver

1989-01-01T23:59:59.000Z

265

Ranges and kinetic energies of fragments from 14.5-mev neutrons induced fission of ²³?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

266

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

267

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

268

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

269

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

270

Fragmentation of N14, O16, Ne20, and Mg24 nuclei at 290 to 1000 MeV/nucleon  

Science Journals Connector (OSTI)

We report fragmentation cross sections measured at 0ˆ for beams of N14, O16, Ne20, and Mg24 ions, at energies ranging from 290 MeV/nucleon to 1000 MeV/nucleon. Beams were incident on targets of C, CH2, Al, Cu, Sn, and Pb, with the C and CH2 target data used to obtain hydrogen-target cross sections. Using methods established in earlier work, cross sections obtained with both large-acceptance and small-acceptance detectors are extracted from the data and, when necessary, corrected for acceptance effects. The large-acceptance data yield cross sections for fragments with charges approximately half of the beam charge and above, with minimal corrections. Cross sections for lighter fragments are obtained from small-acceptance spectra, with more significant, model-dependent corrections that account for the fragment angular distributions. Results for both charge-changing and fragment production cross sections are compared to the predictions of the Los Alamos version of the quark gluon string model (LAQGSM) as well as the NASA Nuclear Fragmentation (NUCFRG2) model and the Particle and Heavy Ion Transport System (PHITS) model. For all beams and targets, cross sections for fragments as light as He are compared to the models. Estimates of multiplicity-weighted helium production cross sections are obtained from the data and compared to PHITS and LAQGSM predictions. Summary statistics show that the level of agreement between data and predictions is slightly better for PHITS than for either NUCFRG2 or LAQGSM.

C. Zeitlin; J. Miller; S. Guetersloh; L. Heilbronn; A. Fukumura; Y. Iwata; T. Murakami; S. Blattnig; R. Norman; S. Mashnik

2011-03-24T23:59:59.000Z

271

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

272

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

273

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

274

SciTech Connect: Water-related Issues Affecting Conventional...  

Office of Scientific and Technical Information (OSTI)

Water-related Issues Affecting Conventional Oil and Gas Recovery and Potential Oil-Shale Development in the Uinta Basin, Utah Citation Details In-Document Search Title:...

275

Buildings Energy Data Book: 4.4 Legislation Affecting Energy...  

Buildings Energy Data Book [EERE]

2 Executive Order 13423, Provisions Affecting Energy Consumption in Federal Buildings Source(s): -- Requires Federal agencies to improve energy efficiency and reduce greenhouse gas...

276

Double di ffential fragmentation cross sections measurements of 95 MeV/u 12C on thin targets for hadrontherapy  

E-Print Network [OSTI]

During therapeutic treatment with heavy ions like carbon, the beam undergoes nuclear fragmentation and secondary light charged particles, in particular protons and alpha particles, are produced. To estimate the dose deposited into the tumors and the surrounding healthy tissues, an accurate prediction on the fluences of these secondary fragments is necessary. Nowadays, a very limited set of double di ffential carbon fragmentation cross sections are being measured in the energy range used in hadrontherapy (40 to 400 MeV/u). Therefore, new measurements are performed to determine the double di ffential cross section of carbon on di erent thin targets. This work describes the experimental results of an experiment performed on May 2011 at GANIL. The double di ffential cross sections and the angular distributions of secondary fragments produced in the 12C fragmentation at 95 MeV/u on thin targets (C, CH2, Al, Al2O3, Ti and PMMA) have been measured. The experimental setup will be precisely described, the systematic error study will be explained and all the experimental data will be presented.

J. Dudouet; D. Juliani; J. C. Ang elique; B. Braunn; J. Colin; D. Cussol; Ch. Finck; J. M. Fontbonne; H. Gu erin; P. Henriquet; J. Krimmer; M. Labalme; M. Rousseau; M. G. Saint-Laurent; S. Salvador

2013-06-03T23:59:59.000Z

277

AVEC 2014: 3D Dimensional Affect and Depression Recognition Challenge  

Science Journals Connector (OSTI)

Mood disorders are inherently related to emotion. In particular, the behaviour of people suffering from mood disorders such as unipolar depression shows a strong temporal correlation with the affective dimensions valence, arousal and dominance. In addition ... Keywords: affective computing, challenge, emotion recognition, facial expression, speech

Michel Valstar, Björn Schuller, Kirsty Smith, Timur Almaev, Florian Eyben, Jarek Krajewski, Roddy Cowie, Maja Pantic

2014-11-01T23:59:59.000Z

278

Generating Affective Music Icons in the Emotion Plane  

E-Print Network [OSTI]

Generating Affective Music Icons in the Emotion Plane Abstract In this paper, we discuss the generation of icons that represent the emotion expressed in music. We use the emotion plane for connecting the music with the icon shape affectively. A model to project arbitrary music on the plane is introduced

Lee, In-Kwon

279

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

280

Statistical and evaporation models for the neutron emission energy spectrum in the center-of-mass system from fission fragments  

Science Journals Connector (OSTI)

Abstract The neutron emission energy spectra in the CMS (center-of-mass) frame from two compound nuclei produced by fission are studied. The neutron spectra calculated with the Hauser–Feshbach statistical model are compared with the evaporation theory, and the definition of the temperature is revisited. Using the Monte Carlo technique we average the CMS neutron spectra from many fission fragments to construct the representative CMS spectrum from both the light and heavy fragments. The CMS spectra for each fission fragment pair are also converted into the laboratory frame to calculate the total prompt fission neutron spectrum that can be observed experimentally. This is compared to measured laboratory data for thermal neutron induced fission on 235U. We show that the Hauser–Feshbach calculation gives a different spectrum shape than the Madland–Nix model calculation.

T. Kawano; P. Talou; I. Stetcu; M.B. Chadwick

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.


281

Influence of complete energy sorting on the characteristics of the odd-even effect in fission-fragment element distributions  

E-Print Network [OSTI]

The characteristics of the odd-even effect in fission-fragment Z distributions are compared to a model based on statistical mechanics. Special care is taken for using a consistent description for the influence of pairing correlations on the nuclear level density. The variation of the odd-even effect with the mass of the fissioning nucleus and with fission asymmetry is explained by the important statistical weight of configurations where the light nascent fission fragment populates the lowest energy state of an even-even nucleus. This implies that entropy drives excitation energy and unpaired nucleons predominantly to the heavy fragment. Therefore, within our model, the odd-even effect appears as an additional signature of the recently discovered energy-sorting process in nuclear fission.

Jurado, Beatriz

2014-01-01T23:59:59.000Z

282

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

283

A MANUAL FOR THE PREDICTION OF BLAST AND FRAGMENT LOADINGS ON STRUCTURES  

Office of Scientific and Technical Information (OSTI)

A MANUAL FOR THE A MANUAL FOR THE PREDICTION OF BLAST AND FRAGMENT LOADINGS ON STRUCTURES U. S. DEPARTMENT OF ENERGY ALBUQUERQUE OPERATIONS OFFICE AMARILLO AREA OFFICE AMARILLO, TEXAS DOE/TIC-11268 Change 1 , ' - 15 August 1981 \ \ DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency Thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or

284

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

285

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

286

Measurement of Complex Fragments and Clues to the Entropy Production from 42-137-MeV/nucleon Ar + Au  

Science Journals Connector (OSTI)

Intermediate-rapidity fragments with A=1-14 emitted from 42-137-MeV/nucleon Ar + Au have been measured. Evidence is presented that these fragments arise from a common moving source. Entropy values are extracted from the mass distributions by use of quantum statistical and Hauser-Feshbach theories. The extracted entropy values of SA?2-2.4 are much smaller than the values expected from measured deuteron-to-proton ratios, but are still considerably higher than theoretically predicted values.

B. V. Jacak; G. D. Westfall; C. K. Gelbke; L. H. Harwood; W. G. Lynch; D. K. Scott; H. Stöker; M. B. Tsang; T. J. M. Symons

1983-11-14T23:59:59.000Z

287

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

288

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

E-Print Network [OSTI]

methods, we present here charge-changing and fragment production cross sec- tions for charges from 6 to 13, on targets ranging from hydrogen

2006-01-01T23:59:59.000Z

289

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

290

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

291

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

292

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

293

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

294

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

295

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... ......

296

Regulation of Dams and Bridges Affecting Navigable Waters (Wisconsin) |  

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

Dams and Bridges Affecting Navigable Waters Dams and Bridges Affecting Navigable Waters (Wisconsin) Regulation of Dams and Bridges Affecting Navigable Waters (Wisconsin) < Back Eligibility Agricultural Commercial Construction Fed. Government Fuel Distributor General Public/Consumer Industrial Installer/Contractor Institutional Investor-Owned Utility Local Government Low-Income Residential Multi-Family Residential Municipal/Public Utility Nonprofit Residential Retail Supplier Rural Electric Cooperative Schools State/Provincial Govt Systems Integrator Transportation Tribal Government Utility Savings Category Water Buying & Making Electricity Home Weatherization Program Info Start Date 2007 State Wisconsin Program Type Siting and Permitting Provider Department of Natural Resources Chapter 31 of the Wisconsin Statutes lays out the regulations relevant to

297

Work Affecting Public Waters (Minnesota) | Department of Energy  

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

Work Affecting Public Waters (Minnesota) Work Affecting Public Waters (Minnesota) Work Affecting Public Waters (Minnesota) < Back Eligibility Utility Fed. Government Commercial Agricultural Investor-Owned Utility State/Provincial Govt Industrial Construction Municipal/Public Utility Local Government Residential Installer/Contractor Rural Electric Cooperative Tribal Government Low-Income Residential Schools Retail Supplier Institutional Multi-Family Residential Systems Integrator Fuel Distributor Nonprofit General Public/Consumer Transportation Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State Minnesota Program Type Siting and Permitting Earlier sections of chapter 103G describe the process of delineating public

298

How Has Saving Energy Affected Your Health? | Department of Energy  

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

Has Saving Energy Affected Your Health? Has Saving Energy Affected Your Health? How Has Saving Energy Affected Your Health? February 4, 2010 - 6:30am Addthis We don't often speak of it in these terms, but saving energy can sometimes have a positive influence on your health. Maybe you're getting more exercise because you bike to work instead of drive, or you're getting more fresh air while jogging outside instead of on the treadmill (not to mention vitamin D!). Maybe you're eating more raw fruits and vegetables instead of turning on the oven to bake a pizza or driving for fast food. Tell us your story. How has saving energy affected your health? Each Thursday, you have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. E-mail your responses to the Energy Saver team at consumer.webmaster@nrel.gov.

299

How Has Saving Energy Affected Your Health? | Department of Energy  

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

How Has Saving Energy Affected Your Health? How Has Saving Energy Affected Your Health? How Has Saving Energy Affected Your Health? February 4, 2010 - 6:30am Addthis We don't often speak of it in these terms, but saving energy can sometimes have a positive influence on your health. Maybe you're getting more exercise because you bike to work instead of drive, or you're getting more fresh air while jogging outside instead of on the treadmill (not to mention vitamin D!). Maybe you're eating more raw fruits and vegetables instead of turning on the oven to bake a pizza or driving for fast food. Tell us your story. How has saving energy affected your health? Each Thursday, you have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. E-mail your responses to the Energy Saver team at consumer.webmaster@nrel.gov.

300

Does health reform affect self-employment? Evidence from Massachusetts  

Science Journals Connector (OSTI)

This paper evaluates whether the implementation of the 2006 Massachusetts health reform law affected the decision of taxpayers to ... Though tenuous, our results suggest that the reform led to a decline in the ra...

Bradley T. Heim; Ithai Z. Lurie

2014-12-01T23:59:59.000Z

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

Paternal investment directly affects female reproductive effort in an insect  

Science Journals Connector (OSTI)

...October 2003 research-article Paternal investment directly affects female reproductive...Accurate quantification of reproductive investment is not possible in many species. Butterflies...production of high-donating sons. paternal investment|maternal effort|differential allocation...

2003-01-01T23:59:59.000Z

302

Microscopic observations of samples affected by delayed ettringite formation (DEF)  

Science Journals Connector (OSTI)

This article, which deals with the study of the microscopic modifications of DEF-affected materials, has two main objectives. The first one is to study the influence of sample preparation on the microcracks of sp...

Nordine Leklou; Jean-Emmanuel Aubert; Gilles Escadeillas

2009-12-01T23:59:59.000Z

303

When Does Information Asymmetry Affect the Cost of Capital?  

E-Print Network [OSTI]

This paper examines when information asymmetry among investors affects the cost of capital in excess of standard risk factors. When equity markets are perfectly competitive, information asymmetry has no separate effect on ...

Armstrong, Christopher S.

304

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...

305

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

306

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

307

Measurement of inclusive jet charged particle fragmentation functions in Pb+Pb collisions at with the ATLAS detector  

Science Journals Connector (OSTI)

Abstract Measurements of charged-particle fragmentation functions of jets produced in ultra-relativistic nuclear collisions can provide insight into the modification of parton showers in the hot, dense medium created in the collisions. ATLAS has measured jets in s NN = 2.76   TeV Pb+Pb collisions at the LHC using a data set recorded in 2011 with an integrated luminosity of 0.14 nb?1. Jets were reconstructed using the anti- k t algorithm with distance parameter values R = 0.2 , 0.3 , and 0.4 . Distributions of charged-particle transverse momentum and longitudinal momentum fraction are reported for seven bins in collision centrality for R = 0.4 jets with p T jet > 100   GeV . Commensurate minimum p T values are used for the other radii. Ratios of fragment distributions in each centrality bin to those measured in the most peripheral bin are presented. These ratios show a reduction of fragment yield in central collisions relative to peripheral collisions at intermediate z values, 0.04 ? z ? 0.2 and an enhancement in fragment yield for z ? 0.04 . A smaller, less significant enhancement is observed at large z and large p T in central collisions.

2014-01-01T23:59:59.000Z

308

Anomalous reaction mean free paths of nuclear projectile fragments from heavy ion collisions at 2A GeV  

Science Journals Connector (OSTI)

We present in detail the description and the analysis of two independent experiments using beams of O16 and Fe56. From their results it is concluded that the reaction mean free paths of relativistic projectile fragments, 3?Z?26, are shorter for a few centimeters after emission than at large distances, where they are compatible with values predicted from experiments on beam nuclei. The probability that this effect is due to a statistical fluctuation is <10-3. The effect is enhanced in later generations of fragments, the correlation between successive generations suggesting a kind of "memory" for the anomaly. Various systematic and spurious effects as well as conventional explanations are discussed, mainly on the basis of direct experimental observations internal to our data, and found not to explain our results. The data can be interpreted by the relatively rare occurrence of anomalous fragments that interact with an unexpectedly large cross section. The statistical methods used in the analysis of the observations are fully described.NUCLEAR REACTIONS O16 and Fe56 at 2A GeV on emulsion nuclei; reaction mean free paths of primary beams and projectile fragments measured and compared.

E. M. Friedlander; R. W. Gimpel; H. H. Heckman; Y. J. Karant; B. Judek; E. Ganssauge

1983-04-01T23:59:59.000Z

309

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

310

Delineation of an Active Fragment and Poly(l-proline) II Conformation for Candidacidal Activity of Bactenecin 5  

Science Journals Connector (OSTI)

Bactenecin 5 and its fragments [BN22 (1?22), BN16 (7?22), and BC24 (20?43)] were synthesized by solid-phase methods. Their antifungal activities on Candida albicans have been studied and compared with those of the native bactenecin 5. The conformational ...

Periathamby Antony Raj; Emil Marcus; Mira Edgerton

1996-04-09T23:59:59.000Z

311

Summary of Major Energy Bill Provisions Affecting Federal Energy Managers  

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

of Major Energy Bill Provisions Affecting Federal Energy Managers of Major Energy Bill Provisions Affecting Federal Energy Managers Section Lead Agency Provisions 102. Energy management goals DOE * Annual energy reduction goal of 2% from FY 2006 - FY 2015 * Reporting baseline changed from 1985 to 2003 * In 180 days, DOE issues guidelines * Retention of energy and water savings by agencies * DOE reports annually on progress to the President and Congress

312

Summary of Major Energy Bill Provisions Affecting Federal Energy Managers  

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

of Major Energy Bill Provisions Affecting Federal Energy Managers of Major Energy Bill Provisions Affecting Federal Energy Managers Section Lead Agency Provisions 102. Energy management goals DOE * Annual energy reduction goal of 2% from FY 2006 - FY 2015 * Reporting baseline changed from 1985 to 2003 * In 180 days, DOE issues guidelines * Retention of energy and water savings by agencies * DOE reports annually on progress to the President and Congress

313

An economic analysis of factors affecting the Texas potato market  

E-Print Network [OSTI]

AN ECONOMIC ANALYSIS OF FACTORS AFFECTING THE TEXAS POTATO MARKET A Thesis OLADIMAGI WINSOME ASGILL 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 1989 Major Subject: Agricultural Economics AN ECONOMIC ANALYSIS OP FACTORS AFFECTING THE TEXAS POTATO MARKET A Thesis OLADIMAGI WINSOME ASGILL Approved as to style and content by: H. L. Goodwin (Chair of Committee) S. W. Fuller (Member...

Asgill, Oladimagi Winsome

2012-06-07T23:59:59.000Z

314

Identification of factors affecting the palatability of goat meat  

E-Print Network [OSTI]

Copyright by MERRITT IVAN PIKE 1975 IDENTIFICATION OF FACTORS AFFECTING THE PALATABILITY OF GOAT MEAT A Thesis by MERRITT IVAN PIKE Submitted to the Graduate College of Texas A8M University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE December 1974 Major Subject: Animal Science (Meat Science) IDENTIFICATION OF FACTORS AFFECTING THE PALATABILITY OF GOAT MEAT A Thesis by MERRITT IVAN PIKE Approved as to style and content by: Co- an of Committee Co...

Pike, Merritt Ivan

2012-06-07T23:59:59.000Z

315

Factors affecting embryo donor performance in Brahman cows  

E-Print Network [OSTI]

FACTORS AFFECTING EMBRYO DONOR PERFORMANCE IN BRAHMAN COWS A Thesis by PEDRO SEGUNDO BASTIDAS Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1986... Major Subject: Physiology of Reproduction FACTORS AFFECTING EMBRYO DONOR PERFORMANCE IN BRAHMAN COWS A Thesis by PEDRO SEGUNDO BASTIDAS Approved as to style and content by: R. D. Randel (Chairman of Committee) P. G. Harms (Committee Member) D...

Bastidas, Pedro Segundo

2012-06-07T23:59:59.000Z

316

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

317

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

318

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

319

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

320

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

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

What Can be Learned Studying the Distribution of the Biggest Fragment ?  

E-Print Network [OSTI]

In the canonical formalism of statistical physics, a signature of a first order phase transition for finite systems is the bimodal distribution of an order parameter. Previous thermodynamical studies of nuclear sources produced in heavy-ion collisions provide information which support the existence of a phase transition in those finite nuclear systems. Some results suggest that the observable Z1 (charge of the biggest fragment) can be considered as a reliable order parameter of the transition. This talk will show how from peripheral collisions studied with the INDRA detector at GSI we can obtain this bimodal behaviour of Z1. Getting rid of the entrance channel effects and under the constraint of an equiprobable distribution of excitation energy (E*), we use the canonical description of a phase transition to link this bimodal behaviour with the residual convexity of the entropy. Theoretical (with and without phase transition) and experimental Z1-E* correlations are compared. This comparison allows us to rule out the case without transition. Moreover that quantitative comparison provides us with information about the coexistence region in the Z1-E* plane which is in good agreement with that obtained with the signal of abnormal uctuations of configurational energy (microcanonical negative heat capacity).

Eric Bonnet; Francesca Gulminelli; Bernard Borderie; Nicolas Le Neindre; Marie-France Rivet

2007-04-11T23:59:59.000Z

322

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

323

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

324

Portsmouth DUF6 Conversion Final EIS - Chapter 3: Affected Environment  

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

Portsmouth DUF Portsmouth DUF 6 Conversion Final EIS 3 AFFECTED ENVIRONMENT This EIS considers the proposed action of building and operating a conversion facility at the Portsmouth site for conversion of the Portsmouth and ETTP DUF 6 cylinder inventories. Section 3.1 presents a detailed description of the affected environment for the Portsmouth site. Because the option of shipping cylinders from the ETTP site in Oak Ridge, Tennessee, to the Portsmouth site for conversion is part of the proposed action, a detailed description of the affected environment for the ETTP site is provided in Section 3.2. 3.1 PORTSMOUTH SITE The Portsmouth site is located in Pike County, Ohio, approximately 22 mi (35 km) north of the Ohio River and 3 mi (5 km) southeast of the town of Piketon (Figure 3.1-1). The two

325

Analysis Of Factors Affecting Natural Source Slf Electromagnetic  

Open Energy Info (EERE)

Factors Affecting Natural Source Slf Electromagnetic Factors Affecting Natural Source Slf Electromagnetic Exploration At Geothermal Wells Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Analysis Of Factors Affecting Natural Source Slf Electromagnetic Exploration At Geothermal Wells Details Activities (0) Areas (0) Regions (0) Abstract: The Super Low Frequency (SLF) electromagnetic exploration was performed by using a nature source SLF electromagnetic detector at two geothermal wells in Peking University. The data of the SLF electromagnetic exploration at well JR-119 and JR-168 were obtained with the observation of continued five days and four times per day at well JR-119 and of one day at well JR-168. Based on these data, the influencing factors of the SI-F electromagnetic exploration were analyzed, which included the relationship

326

Assess Site Factors That Affect Employee Commuting Options for Greenhouse  

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

Assess Site Factors That Affect Employee Commuting Options for Assess Site Factors That Affect Employee Commuting Options for Greenhouse Gas Profile Assess Site Factors That Affect Employee Commuting Options for Greenhouse Gas Profile October 7, 2013 - 1:52pm Addthis YOU ARE HERE: Step 2 After establishing an employee commuting behavior baseline for evaluating a greenhouse gas (GHG) profile, analyze the specific characteristics of the agency's major worksites to help determine which alternative commute methods and work arrangements are viable and what types of strategies may be most effective for promoting those alternatives. It is recommended that worksite-level data collection focus on worksites with the: Largest number of employees, or clusters of worksites with large employee populations in an area with diverse commuting infrastructure

327

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

328

Laboratory investigation of MIC threat due to hydrotest using untreated seawater and subsequent exposure to pipeline fluids with and without SRB spiking  

Science Journals Connector (OSTI)

Microbiologically Influenced Corrosion (MIC) is a major threat to integrities of pipelines and storage tanks. Even though MIC during hydrotest itself may be limited due to lack of nutrients and a relatively short duration, biofilms left behind may flourish after a pipeline or storage tank is commissioned, resulting in failures due to MIC pinhole leaks over the long run. This work investigated MIC threats in simulated hydrotest with X65 coupons using untreated natural seawater and enriched artificial seawater spiked or not spiked with a laboratory strain of Sulfate Reducing Bacteria (SRB) for up to 90 days. The MIC threat after hydrotested pipes were subsequently exposed to pipeline fluids was also investigated by using simulated pipeline fluids containing a mixture of LVT-200 oil, natural seawater and CO2 or a mixture of LVT-200 oil, simulated formation water (65,000 ppm (w/w) NaCl, 22 mM SO 4 2 - ) and CO2. Tests were performed at 22 °C and 37 °C in anaerobic vials. The effectiveness of a 30 min slug of Tetrakis Hydroxymethyl Phosphonium Sulfate (THPS) treatment of the coupons right after hydrotest was also evaluated. MIC pitting was observed in simulated hydrotest using enriched artificial seawater spiked with SRB. MIC pitting was also observed on coupons exposed to simulated pipeline fluids after hydrotesting with SRB spiking using either natural seawater or enriched artificial seawater.

D. Xu; W. Huang; G. Ruschau; J. Hornemann; J. Wen; T. Gu

2013-01-01T23:59:59.000Z

329

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

330

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

331

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

332

B To Identify Slag-Affected Sediment in Southern  

E-Print Network [OSTI]

and boron isotopes could be used to identify and delineate slag-affected bed sediment in Lake Michigan for the protection of water and ecosystem resources in the Great Lakes motivated this study to determine if strontium collected offshore from three Lake Michigan cities (+11.7 to 12.7o/oo). Contoured isotope data indicated

333

Affect Transfer by Metaphor for an Intelligent Conversational Agent  

E-Print Network [OSTI]

Affect Transfer by Metaphor for an Intelligent Conversational Agent Alan Wallington and Rodrigo with a number of `worked examples'. Alan Wallington School of Computer Science, University of Birmingham, Birmingham B152TT, e-mail: Alan. Wallington@dunelm.org.uk,A.M.Wallington@cs.bham.ac.uk Rodrigo Agerri School

Lee, Mark

334

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

335

How do variations in seasonality affect population Electronic Supplementary Material  

E-Print Network [OSTI]

How do variations in seasonality affect population cycles? Electronic Supplementary Material Rachel is the Holling Type II functional form which incorporates handling time of prey. The predators have a logistic the procedure in Taylor et al. (2012). The bifurcation diagrams were created using essentially standard

Sherratt, Jonathan A.

336

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.

337

Resting state correlates of subdimensions of anxious affect  

Science Journals Connector (OSTI)

Resting state fMRI may help identify markers of risk for affective disorder. Given the comorbidity of anxiety and depressive disorders and the heterogeneity of these disorders as defined by DSM, an important challenge is to identify alterations in resting ...

Janine Bijsterbosch; Stephen Smith; Sophie Forster; Oliver P. John; Sonia J. Bishop

2014-04-01T23:59:59.000Z

338

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

339

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

340

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.

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

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.

342

Description of induced nuclear fission with Skyrme energy functionals: Static potential energy surfaces and fission fragment properties  

Science Journals Connector (OSTI)

Eighty years after its experimental discovery, a 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 Pu239(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 parametrization of the Skyrme energy density and the role of pairing correlations on deformation properties from the ground state up to scission are also quantified. We introduce a general template for the quantitative description of fission fragment properties. It is based on the careful analysis of scission configurations, 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

2014-11-06T23:59:59.000Z

343

Mass and nuclear charge yields for 237Np(2nth,f) at different fission fragment kinetic energies  

Science Journals Connector (OSTI)

The recoil mass separator LOHENGRIN of the Laue-Langevin Institute Grenoble has been used to measure for the first time, the yields of light fission fragments from the fissioning system: 23993Np; this odd-Z nucleus is formed after double thermal neutron capture in a 23993Np target. The mass distributions were measured for different kinetic energies between 92 and 115.5 MeV, but the nuclear charge distributions were determined only up to 112 MeV. These distributions are compared to the distributions obtained for the even-even system 24094Pu. At high kinetic energy, the mass distribution shows a prominent peak around mass number AL = 106. These cold fragmentations are discussed in terms of a calculation based on a scission point model extrapolated to the cold fission case. As expected for an odd-Z fissioning nucleus, the nuclear charge distributions do not reveal any odd-even effect. The global neutron odd-even effect is found to be (8.1 ± 1.5)%. A simple model has been used to show that most of the neutron odd-even effect results from prompt neutron evaporation from the fragments.

G. Martinez; G. Barreau; A. Sicre; T.P. Doan; P. Audouard; B. Leroux; W. Arafa; R. Brissot; J.P. Bocquet; H. Faust; P. Koczon; M. Mutterer; F. Gönnenwein; M. Asghar; U. Quade; K. Rudolph; D. Engelhardt; E. Piasecki

1990-01-01T23:59:59.000Z

344

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

345

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

346

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

347

Drift-Diffusion Model of the Fragmentation of the External Ring Structure in the Photoluminescence Pattern Emitted by Indirect Excitons in Coupled Quantum Wells  

Science Journals Connector (OSTI)

Under optical excitation, coupled quantum wells are known to reveal fascinating features in the photoluminescence pattern originating from dipole orientated indirect excitons. The appearance of an external ring has been attributed to macroscopic charge separation in the quantum well plane. We present a classical model of nonlinear diffusion to account for the observed fragmentation of the external ring into a periodic array of islands. The model incorporates the Coulomb interactions between electrons, holes, and indirect excitons. At low temperatures, these interactions lead to pattern formation similar to the experimentally observed ring fragmentation. The fragmentation is found to persist to temperatures above the quantum degeneracy temperature of indirect excitons.

J. Wilkes, E. A. Muljarov, and A. L. Ivanov

2012-10-31T23:59:59.000Z

348

Characteristics of Fragments Produced in the Interaction of 5.5-GeV Protons with Silver  

Science Journals Connector (OSTI)

The energy spectra of nuclear fragments produced by the interaction of 5.5-GeV protons with silver were determined at several laboratory angles by means of dEdx-E measurements with semiconductor-detector telescopes. Individual isotopes of the elements from hydrogen to nitrogen were resolved. From oxygen to silicon the elements were determined without isotopic separation. For the case of the isotopes of He through Be enough of the evaporation-like energy spectra were recorded so that it was possible to perform integrations to obtain angular distributions and total cross sections. For elements above beryllium, an experimental cutoff on the low-energy side precluded these integrations, and only the high-energy portions of the spectra were recorded. The energy spectra of the neutron-deficient isotopes differ from the others in that the high-energy parts of the spectra are more pronounced and flatter, and the angular distributions are more forward-peaked.Some of the energy spectra were fitted with calculated curves based on the isotropic evaporation of fragments from an excited nucleus moving along the beam axis. The apparent Coulomb barriers obtained from this analysis were about one half the nominal Coulomb barriers, and the apparent nuclear temperatures fell in the 8-11-MeV range. However, no one temperature could fit the entire energy range, and for the highest-energy fragments observed at 90° the apparent temperature rose to 20 MeV or higher. From the forward-backward shifts of the most probable energy it was deduced that the average velocity of the moving system emitting Li and Be fragments is 0.008c. However, all of the data are more forward-peaked in intensity than can be explained by the simple two-step model. The energy analysis carried out on these new data is compared with those given in the literature for silver targets or emulsions bombarded with protons, cosmic rays, pions, kaons, and other particles. Comparisons are made of these results with those obtained in an earlier study of fragments from a uranium target.

Earl K. Hyde; Gilbert W. Butler; A. M. Poskanzer

1971-11-01T23:59:59.000Z

349

Analysis of energies of stationary bubbles at liquid pool surfaces and the subsequent droplet release due to bubble burst based on RESUS code calculations  

SciTech Connect (OSTI)

In case of a hypothetical nuclear reactor accident involving a failure of the primary system, a liquid coolant pool may frequently be formed, which may be contaminated by suspended or solved fuel particles and fission products. For many accident sequences, in which gas is injected into the liquid domain or bubbles are generated by means of heating, pressure transients or chemical reactions, the release of low volatile species from liquid surfaces into a gas atmosphere due to bubble burst is identified as a decisive release mechanism. Generally, resuspension of radioactive species is caused by droplets ejected from the pool surface into the atmosphere, either dominated by direct momentum exchange mechanisms between gas flow and liquid for high gas fluxes or by bursting of single bubbles in case of low gas fluxes. In the latter case, the release of droplets containing radionuclides is governed by two mechanisms, namely micro-droplet generation due to bubble film cap collapse and formation and subsequent disintegration of liquid jets producing so-called jet droplets. Jet and jet droplet formation is modeled in the code system RESUS.MOD2 which contains models for the growth of the bubble in the pool, its shape while resting at the liquid surface, and jet and jet-droplet generation after bubble cap rupture. Using the module BUBSHAPE (BUBbleSHAPE) of the RESUS code, the characteristic profile of a bubble resting at the liquid surface as well as the mechanical energies available for droplet formation and consequently droplet- and particle release can be determined. The governing resuspension energies are identified to be the surface energy, the energy stored in the gas within the bubble due to its excess pressure, and the potential energy due to the displacement of liquid.

Starflinger, J.; Koch, M.K.; Brockmeier, U.; Unger, H. [Ruhr Univ., Bochum (Germany). Dept. for Nuclear and New Energy Systems; Schuetz, W. [Inst. for Reactor Safety, Karlsruhe (Germany)

1996-08-01T23:59:59.000Z

350

TSPA Model Development and Sensitivity Analysis of Processes Affecting  

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

TSPA Model Development and Sensitivity Analysis of Processes TSPA Model Development and Sensitivity Analysis of Processes Affecting Performance of a Salt Repository for Disposal of Heat-Generating Nuclear Waste TSPA Model Development and Sensitivity Analysis of Processes Affecting Performance of a Salt Repository for Disposal of Heat-Generating Nuclear Waste The document describes the initial work on designing and developing requirements for a total system performance assessment (TSPA) model that can support preliminary safety assessments for a mined geologic repository for high-level waste (HLW) and spent nuclear fuel (SNF) in salt host rock at a generic site. A preliminary generic salt TSPA model for HLW/SNF disposal has been developed and tested for an isothermal repository in salt, for emplaced waste that is assumed to have no decay heat; for salt

351

Low Dose Radiation Research Program: Genetic Factors Affecting  

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

Affecting Susceptibility to Low-Dose Radiation Affecting Susceptibility to Low-Dose Radiation William F. Morgan Pacific Northwest National Laboratory Why This Project The short-term effects of high doses of ionizing radiation on cellular responses are relatively well understood. Less clear are the long-term consequences of exposure to low dose/low dose-rate radiation and the effects of radiation exposure on the progeny of surviving cells. If a cell survives radiation, it is generally thought to have repaired all the radiation-induced insults and be capable of a "normal healthy life". At a certain frequency, however, we have found that some cells surviving radiation grow normally, but will rearrange their genetic material during time in culture. We call this radiation-induced genomic instability. Many

352

Low Dose Radiation Research Program: Genetic Factors Affecting  

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

Genetic Factors Affecting Susceptibility to Low-Doses of Ionizing Genetic Factors Affecting Susceptibility to Low-Doses of Ionizing Radiation. Authors: William F. Morgan, Pat Concannon & John H.J. Petrini The goal of this program is to test the hypothesis that mice heterozygous for the NBS1 gene are genetically susceptible to low doses of ionizing radiation. Patients with Nijmegen Breakage Syndrome (NBS) are radiation sensitive, because of defects in cellular responses to radiation induced genetic damage. It is unclear whether humans heterozygous for the mutations associated with NBS are radiation sensitive and results from cell culture experiments give conflicting results. In collaboration with John Petrini at the Memorial Sloan Kettering Cancer Center in New York City we developed a mouse model of this disorder and are directly testing the hypothesis

353

Fragment of the chemical structure of type II and II-S kerogen in the Upper Jurassic and Upper Devonian formations of the East European Platform  

Science Journals Connector (OSTI)

A model is proposed for a fragment of the chemical structures of the geopolymers based on elemental ... Jurassic and Devonian formations in the East European Platform. The Sorg/C ratio in kerogen from oil shales ...

N. S. Burdel’naya; D. A. Bushev

2010-05-01T23:59:59.000Z

354

Small-Angle Neutron Scattering Studies of the Conformation of Myeloma Protein MOPC315 and its Fab Fragment, and the Interaction with a Monovalent Dinitrophenyl Hapten  

Science Journals Connector (OSTI)

...research-article Small-Angle Neutron Scattering Studies of the Conformation...fixation. Small-angle neutron scattering studies of the conformation...Fragments Myeloma Proteins Neutrons Protein Conformation Scattering, Radiation The Royal Society...

1981-01-01T23:59:59.000Z

355

Early Trends in Landcover Change and Forest Fragmentation Due to Shale-Gas Development in Pennsylvania: A Potential Outcome for the Northcentral Appalachians  

Science Journals Connector (OSTI)

Worldwide shale-gas development has the potential to cause substantial ... , we examine land cover change due to shale-gas exploration, with emphasis on forest fragmentation. Pennsylvania’s shale-gas development ...

P. J. Drohan; M. Brittingham; J. Bishop; K. Yoder

2012-05-01T23:59:59.000Z

356

Survey of state water laws affecting coal slurry pipeline development  

SciTech Connect (OSTI)

This report summarizes state water laws likely to affect the development of coal slurry pipelines. It was prepared as part of a project to analyze environmental issues related to energy transportation systems. Coal slurry pipelines have been proposed as a means to expand the existing transportation system to handle the increasing coal shipments that will be required in the future. The availability of water for use in coal slurry systems in the coal-producing states is an issue of major concern.

Rogozen, M.B.

1980-11-01T23:59:59.000Z

357

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

358

Cognition and affect in the development of sense of place  

E-Print Network [OSTI]

, 1974a), both selfconscious and unselfconscious (Relph, 1976), and both cognitive and affective (Firey, 1945; Piaget and Weil, 1951). These definitions and charac- terizations are the beginning attempts at describing the processes by which sense... experience are greatly weakened in most contemporary cultures. The trend is toward an environment of few significant places--towards a placeless geography (Relph, 1976, 93, 117). As a result of this concern there is a trend to restore and encourage sense...

Engman, Dianne Lynn

2012-06-07T23:59:59.000Z

359

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.

360

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

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.


361

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

362

Differential hemodynamic response in affective circuitry with aging: An fmri study of novelty, valence, and arousal  

Science Journals Connector (OSTI)

Emerging evidence indicates that stimulus novelty is affectively potent and reliably engages the amygdala and other portions of the affective workspace in the brain. Using fMRI, we examined whether novel stimuli remain affectively salient across the ...

Yoshiya Moriguchi; Alyson Negreira; Mariann Weierich; Rebecca Dautoff; Bradford C. Dickerson; Christopher I. Wright; Lisa Feldman Barrett

2011-05-01T23:59:59.000Z

363

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

364

Mapping musical intervals to affective qualities: A projective study  

Science Journals Connector (OSTI)

Many claim that the various musical intervals used in Western music create identifiable affective impressions which musicians use for musical communication. Alain Danielou has proposed furthermore that these affective impressions form a space with a three?dimensional structure isomorphic to the natural three?dimensional structure of the intervals themselves (ratios composed of positive and negative powers of 2 3 and 5). To test this hypothesis 36 Marathi?speaking college students at Ahmednagar College Maharastra India were asked to imagine that each of 24 complex?tone melodicintervals was the “sound?name” of a person in some distant village. They were then given 36 bipolar adjective pairs and asked to rate the personality of the parson they imagined on five?point scales. (Previous studies have shown that subjects make affective judgments about sounds far more easily when imagining personalities than when rating the sounds themselves.) Results indicate that Indian students associate the main intervals used in Western music with separable personalities and that these personalities compare well with those Western listeners reported in a previous study. [Work supported by the American Institute of Indian Studies.

Scott Makeig

1986-01-01T23:59:59.000Z

365

Factors affecting public and political acceptance for the implementation of geological disposal  

SciTech Connect (OSTI)

The main objective of this paper is to identify conditions which affect public concern (either increase or decrease) and political acceptance for developing and implementing programmes for geologic disposal of long-lived radioactive waste. It also looks how citizens and relevant actors can be associated in the decision making process in such a way that their input is enriching the outcome towards a more socially robust and sustainable solution. Finally, it aims at learning from the interaction how to optimise risk management addressing needs and expectations of the public and of other relevant stakeholders. In order to meet these objectives, factors of relevance for societal acceptance conditions are identified, described and analysed. Subsequently these factors are looked for in the real world of nuclear waste management through cases in several countries. The analysis is conducted for six stages of a repository programme and implementation process, from policy development to the realisation of the repository itself. The diversity of characteristics of such contexts increases insight in the way society and values of reference are influencing technological decision making. These interrelated factors need to be integrated in step by step decision making processes as emerging the last years in HLW disposal management. In the conclusions, the effect of each factor on acceptance is derived from the empirical record. In the course of carrying out this analysis, it became clear that acceptance had a different meaning in the first three stages of the process, more generic and therefore mainly discussed at policy level and the other stages, by nature more site-specific, and therefore requesting both public and political acceptance. Experience as clearly addressed in this report has shown that a feasible solution has its technical dimension but that 'an acceptable solution' always will have a combined technical and social dimension. If the paper provides tentative answers to the central question how factors affect public and political acceptance, it also aims at illustrating the added value of broadening the technical dimension with social dialogue and insight in value judgements. (authors)

Neerdael, Bernard [International Atomic Energy Agency - IAEA, Wagramer Strasse 5, P.O. Box 100 - 1400 Vienna (Austria)

2007-07-01T23:59:59.000Z

366

E-Print Network 3.0 - alcohol consumption affect Sample Search...  

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

consumption affect Search Powered by Explorit Topic List Advanced Search Sample search results for: alcohol consumption affect Page: << < 1 2 3 4 5 > >> 1 Dublin City University...

367

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...

368

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...

369

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...

370

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...

371

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...

372

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...

373

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...

374

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...

375

E-Print Network 3.0 - affected offspring combining Sample Search...  

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

of offspring environment. Thus, whether the parental phenotype will affect offspring development should also... , rather than being affected by environmental conditions experi-...

376

The effect of oxygen-to-fuel stoichiometry on coal ash fine-fragmentation mode formation mechanisms.  

SciTech Connect (OSTI)

Ash particles smaller than 2.5 {micro}m in diameter generated during pulverized coal combustion are difficult to capture and may pose greater harm to the environment and human health than the discharge of larger particles. Recent research efforts on coal ash formation have revealed a middle fine-fragment mode centered around 2 {micro}m. Formation of this middle or fine-fragment mode (FFM) is less well understood compared to larger coarse and smaller ultrafine ash. This study is part of an overall effort aimed at determining the key factors that impact the formation of FFM. This work examined the effects of oxygen-to-fuel stoichiometry (OFS). Pulverized Illinois No.6 bituminous coal was combusted and the ash generated was size segregated in a Dekati low pressure inertial impactor. The mass of each fraction was measured and the ash was analyzed using scanning electron microscopy (SEM) and X-ray microanalysis. The FFM ash types were classified based on the SEM images to evaluate the significant fine-fragment ash formation mechanisms and determine any possible link between stoichiometry and formation mechanism. From the particle size distributions (PSDs), the coarse mode appears unaffected by the change in OFS, however, the OFS 1.05 lowered the fraction of ultrafine ash in relation to the higher OFS settings, and appears to increase the portion of the FFM. An intermediate minimum was found in the FFM at 1.3 {micro}m for the 1.20 and 1.35 OFS tests but was not observed in the 1.05 OFS. SEM analysis also suggests that OFS may contribute to changing formation mechanisms.

Fix, G.; Seames, W. S.; Mann, M. D.; Benson, S. A.; Miller, D. J. (Materials Science Division); (Univ. of North Dakota)

2011-04-01T23:59:59.000Z

377

Total and Partial Fragmentation Cross-Section of 500 MeV/nucleon Carbon Ions on Different Target Materials  

E-Print Network [OSTI]

By using an experimental setup based on thin and thick double-sided microstrip silicon detectors, it has been possible to identify the fragmentation products due to the interaction of very high energy primary ions on different targets. Here we report total and partial cross-sections measured at GSI (Gesellschaft fur Schwerionenforschung), Darmstadt, for 500 MeV/n energy $^{12}C$ beam incident on water (in flasks), polyethylene, lucite, silicon carbide, graphite, aluminium, copper, iron, tin, tantalum and lead targets. The results are compared to the predictions of GEANT4 (v4.9.4) and FLUKA (v11.2) Monte Carlo simulation programs.

Behcet Alpat; Ercan Pilicer; Sandor Blasko; Diego Caraffini; Francesco Di Capua; Vasile Postolache; Giorgio Saltanocchi; Mauro Menichelli; Laurent Desorgher; Marco Durante; Radek Pleskac; Chiara La Tessa

2014-01-20T23:59:59.000Z

378

Extended sum-rule model view of light and intermediate mass fragment emission in nuclear reactions at intermediate energies  

Science Journals Connector (OSTI)

The original sum-rule model worked out by Wilczy?ski et al. and successfully used for a global description of complete and incomplete fusion reactions has been extended by a term accounting for dissipative processes of the dinuclear system on its way to fusion. When applying to light- and heavy-ion collisions with various targets at energies in the transitional region, the new term proves to be rather essential for reproducing the element distributions of the fragments emitted from rather asymmetric systems.

I. M. Brncu?; H. Rebel; J. Wentz; V. Corcalciuc

1990-11-01T23:59:59.000Z

379

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

380

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

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

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

382

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

383

Factors affecting the usage of intranet: A confirmatory study  

Science Journals Connector (OSTI)

The extent of intranet implementation and use within individual organizations has significant implications for organizational performance. Previous studies on technology adoption in the workplace suggest that acceptance behavior is influenced by a variety of antecedent factors including individual differences, social influences, beliefs, attitudes, and situational influences. This study reports on an investigation of extended TAM (Technology Acceptance Model) using external factors and subjective norm influencing usage of intranet within organizations. The external factors affecting the perceived ease of use, perceived usefulness, and usage of intranet include technical support, Web experience, task equivocality, and task interdependence. The subjective norm is the mediating variable and external variables indirectly affect usage of intranet indirectly through their effects on subjective norm. Based on a survey of 333 intranet users from 10 major Korean companies, this study uses a structural equation model to test the research model. The results indicate that usage of intranet is influenced by technical support, Web experience, task equivocality, and perceived ease of use. Technical support and Web experience influences the perceived ease of use. Technical support, task equivocality, and task interdependence have positive effects on the subjective norm. Usage of intranet which is a dependent variable in this model, is influenced by technical support, Web experience task interdependence, and perceived ease of use.

Sangjae Lee; Byung Gon Kim

2009-01-01T23:59:59.000Z

384

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

385

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

386

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

387

Income tax season is just around the corner and it is important for all parents of children living with diabetes to be familiar with the Disability Tax Credit (DTC) and subsequently, the Child  

E-Print Network [OSTI]

with diabetes to be familiar with the Disability Tax Credit (DTC) and subsequently, the Child Disability Benefit (CDB). The Disability Tax Credit is a non-refundable tax credit that reduces the amount of income tax qualify for the Disability Tax Credit as they require a form of life sustaining therapy which may require

Morris, Joy

388

Factors affecting characterization of bulk high-temperature superconductors  

SciTech Connect (OSTI)

Three major factors affect the characterization of bulk high-temperature superconductors in terms of their levitation properties during interaction with permanent magnets. First, the appropriate parameter for the permanent magnet is internal magnetization, not the value of the magnetic field measured at the magnet`s surface. Second, although levitation force grows with superconductor thickness and surface area, for a given permanent magnet size, comparison of levitation force between samples is meaningful when minimum values are assigned to the superconductor size parameters. Finally, the effect of force creep must be considered when time-averaging the force measurements. In addition to levitational force, the coefficient of friction of a levitated rotating permanent magnet may be used to characterize the superconductor.

Hull, J.R. [Argonne National Lab., IL (United States). Energy Technology Div.

1997-11-01T23:59:59.000Z

389

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

390

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

391

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

392

A fuzzy psycho-physiological approach to enable the understanding of an engineer’s affect status during CAD activities  

Science Journals Connector (OSTI)

Abstract Affective computing involves human–computer interaction (HCI) where an interface can detect and respond in context to a user’s emotions. Emotions play an essential role in the daily activities of a human during work and, as a consequence, can critically affect their decision-making. Recent research on affective computing opens the door to exploring the emotional aspects of computer aided tasks and HCI; however, there is little research in this area related to computer aided design (CAD). There is an established connection between emotional and cognitive processes and without these emotional markers decision-making in humans is almost non-existent. The holy grail of engineering design is for a concept to be ‘right-first-time’ and only by delving into the affect-cognitive domain will insights in terms of the associability of critical decision-making and the underlying intent of engineering decisions and tasks be better understood. Work in this field aims to recognize, interpret and process human emotions in order to support and adapt computer-based systems and their associated interfaces to user behaviors and to elicit appropriate system responses. This is a very contemporary area in engineering design research. One key aspect of provisioning CAD systems with the capability to detect the emotional state of the engineer is to lessen the chance of distorted reasoning as a result of irrational judgements. Work in this area can potentially identify emotional markers that influence the coherence/incoherence of reasoning against knowledge as well as the potential quality and suitability of a specific engineering solution or approach. This paper proposes and investigates a methodology to determine the emotional aspects attributed to a set of CAD design tasks by analyzing the CAD operators’ psycho-physiological signals. Two sets of experiments were conducted. A pilot case study focused on modeling tasks carried out in Solid Edge™ was run to prove the validity of the methodology, the tools applied and subsequent analysis. The main case study extended this to more wide-ranging user logging, incorporating a series of configuration and optimization tasks in Siemens NX™ for a real design task. Psycho-physiological signals of electroencephalography (EEG) and galvanic skin resistance (GSR)/electrocardiography (ECG) were recorded along with a log of CAD system user interactions. A fuzzy logic model was established to map the psycho-physiological signals to a set of key emotions, namely frustration, satisfaction, engagement and challenge and the results analyzed. The methodology and subsequent analysis applied was found to be repeatable. Over the various task action-chains the elicitation and interpretation of each participant’s emotions were successfully carried out with significant correlations demonstrated between the associated engineers’ CAD activities and their reported emotional states.

Y. Liu; J.M. Ritchie; T. Lim; Z. Kosmadoudi; A. Sivanathan; R.C.W. Sung

2014-01-01T23:59:59.000Z

393

Note: The content of this report is premised on industry interviews that were conducted prior to September 2011 and do not reflect discussions, initiatives, activities, or developments that are subsequently taking place within the  

E-Print Network [OSTI]

how the standards affect or could affect utility operations in terms of grid reliability, security with the smart grid security work. NIST has a great opportunity to drive our security program. Smart Grid Metrics Smart Grid Research Activities Introduction This section of the report represents the work of SGFAC

394

Fragment production in central heavy-ion collisions: reconciling the dominance of dynamics with observed phase transition signals through universal fluctuations  

E-Print Network [OSTI]

Fragment production in central collisions of Xe+Sn has been systematically studied with the INDRA multidetector from 25 to 150 AMeV. The predominant role of collision dynamics is evidenced in multiple intermediate mass fragment production even at the lowest energies, around the so-called "multifragmentation threshold". For beam energies 50 AMeV and above, a promising agreement with suitably modified Antisymmetrised Molecular Dynamics calculations has been achieved. Intriguingly the same reactions have recently been interpreted as evidence for a liquid-gas phase transition in thermodynamically equilibrated systems. The universal fluctuation theory, thanks to its lack of any equilibrium hypothesis, shows clearly that in all but a tiny minority of carefully-selected central collisions fragment production is incompatible with either critical or phase coexistence behaviour. On the other hand, it does not exclude some similarity with aggregation scenarios such as the lattice-gas or Fisher droplet models.

J. D. Frankland; A. Chbihi; S. Hudan; A. Mignon; A. Ono; for the INDRA; ALADIN collaborations

2002-02-28T23:59:59.000Z

395

Correlations between isospin dynamics and Intermediate Mass Fragments emission time scales: a probe for the symmetry energy in asymmetric nuclear matter  

E-Print Network [OSTI]

We show new data from the $^{64}$Ni+$^{124}$Sn and $^{58}$Ni+$^{112}$Sn reactions studied in direct kinematics with the CHIMERA detector at INFN-LNS and compared with the reverse kinematics reactions at the same incident beam energy (35 A MeV). Analyzing the data with the method of relative velocity correlations, fragments coming from statistical decay of an excited projectile-like (PLF) or target-like (TLF) fragments are discriminated from the ones coming from dynamical emission in the early stages of the reaction. By comparing data of the reverse kinematics experiment with a stochastic mean field (SMF) + GEMINI calculations our results show that observables from neck fragmentation mechanism add valuable constraints on the density dependence of symmetry energy. An indication is found for a moderately stiff symmetry energy potential term of EOS.

De Filippo, E; Auditore, L; Baran, V; Berceanu, I; Cardella, G; Colonna, M; Geraci, E; Gianì, S; Grassi, L; Grzeszczuk, A; Guazzoni, P; Han, J; La Guidara, E; Lanzalone, G; Lombardo, I; Maiolino, C; Minniti, T; Pagano, A; Papa, M; Piasecki, E; Pirrone, S; Politi, G; Pop, A; Porto, F; Rizzo, F; Russotto, P; Santoro, S; Trifirò, A; Trimarchi, M; Verde, G; Vigilante, M; Wilczy?ski, J; Zetta, L

2012-01-01T23:59:59.000Z

396

Correlations between isospin dynamics and Intermediate Mass Fragments emission time scales: a probe for the symmetry energy in asymmetric nuclear matter  

E-Print Network [OSTI]

We show new data from the $^{64}$Ni+$^{124}$Sn and $^{58}$Ni+$^{112}$Sn reactions studied in direct kinematics with the CHIMERA detector at INFN-LNS and compared with the reverse kinematics reactions at the same incident beam energy (35 A MeV). Analyzing the data with the method of relative velocity correlations, fragments coming from statistical decay of an excited projectile-like (PLF) or target-like (TLF) fragments are discriminated from the ones coming from dynamical emission in the early stages of the reaction. By comparing data of the reverse kinematics experiment with a stochastic mean field (SMF) + GEMINI calculations our results show that observables from neck fragmentation mechanism add valuable constraints on the density dependence of symmetry energy. An indication is found for a moderately stiff symmetry energy potential term of EOS.

E. De Filippo; F. Amorini; L. Auditore; V. Baran; I. Berceanu; G. Cardella; M. Colonna; E. Geraci; S. Gianì; L. Grassi; A. Grzeszczuk; P. Guazzoni; J. Han; E. La Guidara; G. Lanzalone; I. Lombardo; C. Maiolino; T. Minniti; A. Pagano; M. Papa; E. Piasecki; S. Pirrone; G. Politi; A. Pop; F. Porto; F. Rizzo; P. Russotto; S. Santoro; A. Trifirò; M. Trimarchi; G. Verde; M. Vigilante; J. Wilczy?ski; L. Zetta

2012-09-28T23:59:59.000Z

397

Effect of the symmetry energy on nuclear stopping and its relation to the production of light charged fragments  

E-Print Network [OSTI]

We present a complete systematics (excitation function, impact parameter, system size, isospin asymmetry, and equations of state dependences) of global stopping and fragment production for heavy-ion reactions in the energy range between 50 and 1000 MeV/nucleon in the presence of symmetry energy and an isospin-dependent cross section. It is observed that the degree of stopping depends weakly on the symmetry energy and strongly on the isospin-dependent cross section. However, the symmetry energy and isospin-dependent cross section has an effect of the order of more than 10% on the emission of light charged particles (LCP's). It means that nuclear stopping and LCP's can be used as a tool to get the information of an isospin-dependent cross section. Interestingly, the LCP's emission in the presence of symmetry energy is found to be highly correlated with the global stopping.

Sanjeev Kumar; Suneel Kumar; Rajeev K. Puri

2010-04-06T23:59:59.000Z

398

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

399

Study of quark fragmentation in e(+)e(-) annihilation at 29 GeV: Global jet parameters and single-particle distributions  

E-Print Network [OSTI]

regions, since the correction de- pends on the combined effect of the smearing of the axes as well as on the particular values of the variable. A simi- lar effect is present in the pT variable. The longitudinal 31 STUDY OF QUARK FRAGMENTATION IN e+e...PARTICLES AND FIELDS THIRD SERIES, VOLUME 31, NUMBER 1 1 JANUARY 1985 Study of quark fragmentation in e+e annihilation at 29 GeV: Global jet parameters and single-particle distributions D. Bender, "M. Derrick, E. Fernandez, '"' R. Fries,". G...

Baringer, Philip S.

1985-01-01T23:59:59.000Z

400

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

Note: This page contains sample records for the topic "affects subsequent fragmentation" from the National Library of EnergyBeta (NLEBeta).
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401

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

402

E-Print Network 3.0 - affect synaptic distribution Sample Search...  

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

To understand how short-term plasticity affects how a pre- synaptic neuron influences the firing of its... in synaptic strength tend to cancel each other out. This affects the...

403

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...

404

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...

405

Does parental age difference affect offspring count in humans? Comment on Fieder and Huber  

Science Journals Connector (OSTI)

2007 The Royal Society 23 February 2008 article-commentary Evolutionary biology Does parental age difference affect offspring count in...689-691. ( doi:10.1098/rsbl.2007.0324 ) Does parental age difference affect offspring count in...

2008-01-01T23:59:59.000Z

406

Modeling and analysis of affective influences on human experience, prediction, decision making, and behavior  

E-Print Network [OSTI]

Subjective and affective elements are well-known to influence human decision making. This dissertation presents a theoretical and empirical framework on how human decision makers' subjective experience and affective ...

Ahn, Hyungil, 1976-

2010-01-01T23:59:59.000Z

407

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...

408

E-Print Network 3.0 - affects vegf distribution Sample Search...  

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

Cells Affects VEGF Distribution and ... Source: Popel, Aleksander S. - Department of Biomedical Engineering, Johns Hopkins University Collection: Engineering ; Biology and...

409

Affective Analgesia Following Muscarinic Activation of the Ventral Tegmental Area in Rats  

E-Print Network [OSTI]

Affective Analgesia Following Muscarinic Activation of the Ventral Tegmental Area in Rats Robert G stimulation. Vocalization afterdischarges (VADs) are a validated model of the affective response of rats: Cholinergic activation of the brain reward circuit produced a preferential suppression of rats' affective

Borszcz, George S.

410

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

411

Structure Determination of Polyunsaturated Fatty Acids by Gas Chromatography-Mass Spectrometry—A Comparison of Fragmentation Patterns of Various Derivatives  

Science Journals Connector (OSTI)

......C - C I I 0 0 B Since boron does not participate...tributing system and alkyl-boron cleavage does not take...the corres- ponding isotope peaks observed at m...fragment ions containing two boron atoms. On the basis...diagnostic value for structure determination of polyenoate derivatives......

Veronika Dommes; Ferdinand Wirtz-Peitz; Wolf-H. Kunau

1976-08-01T23:59:59.000Z

412

Imaging Mass Spectrometry of a Specific Fragment of Mitogen-Activated Protein Kinase/Extracellular Signal-Regulated Kinase Kinase Kinase 2 Discriminates Cancer from Uninvolved Prostate Tissue  

Science Journals Connector (OSTI)

...The optimal cutoff point was defined as that point on the ROC curve...was then done in LIFT mode. An optimized...were then washed four times in PBS and...collected using TOF/TOF LIFT. Peaks attributed...the same tissue, four predicted fragments...

Lisa H. Cazares; Dean Troyer; Savvas Mendrinos; Raymond A. Lance; Julius O. Nyalwidhe; Hind A. Beydoun; Mary Ann Clements; Richard R. Drake; and O. John Semmes

2009-09-01T23:59:59.000Z

413

Neoplastic transformation by a cloned human cytomegalovirus DNA fragment uniquely homologous to one of the transforming regions of herpes simplex virus type 2  

Science Journals Connector (OSTI)

...heat-denatured salmon testes DNA at 200 gg/ml. Hybridization with nick-translated (17) 32P-labeled probes (specific activity...trans- formation process induced by this specific HCMV fragment merit discussion. Nitrocellulose filter hybridization in a range...

D J Clanton; R J Jariwalla; C Kress; L J Rosenthal

1983-01-01T23:59:59.000Z

414

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

415

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

416

Nuclear reactions of medium and heavy target nuclei with high-energy projectiles III. Emission of24Na and28Mg fragments  

Science Journals Connector (OSTI)

The emission of24Na and28Mg fragments in the reaction induced by 3·65 A GeV12C-ions and 3·65 GeV protons on Mn, Co, Cu, Ag, Au, and Pb targets has been studied. The experimental ratios of forward-to-backward emis...

P. Kozma

1990-05-01T23:59:59.000Z

417

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.

418

The EMBO Journal vol.5 no.11 pp.3045-3049, 1986 Localization of two chymotryptic fragments in the structure of  

E-Print Network [OSTI]

in the structure of renatured bacteriorhodopsin by neutron diffraction Jill Trewhelial, Jean-Luc Popot2, Giuseppe frag- ments has been studied by neutron diffraction. In one of the samples studied, the fragment C-2 Press Limited, Oxford, England ferent assignment models predict the changes in the neutron diffraction

419

Detection of Amantadine-Resistant Influenza A Virus Strains in Nursing Homes by PCR-Restriction Fragment Length Polymorphism Analysis with Nasopharyngeal Swabs  

Science Journals Connector (OSTI)

...Amantadine-Resistant Influenza A Virus Strains in Nursing Homes by PCR-Restriction Fragment Length Polymorphism...had resistance patterns in eight nursing homes in the 1998-1999 season. Thirty-one...resistant viruses were circulating in nursing homes where the drug was used not only for influenza...

Reiko Saito; Hitoshi Oshitani; Hiroki Masuda; Hiroshi Suzuki

2002-01-01T23:59:59.000Z

420

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

2014-05-27T23:59:59.000Z

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.
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to obtain the most current and comprehensive results.


421

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

422

Time series anomaly detection using recessive subsequence  

Science Journals Connector (OSTI)

Time series arise frequently in many sciences and engineering application, including finance, digital audio, motion capture, network security, and transportation. In this work, we propose a technique for discovering anomalies in time series that takes ...

Yonchanok Khaokaew; Sirikarn Pukkawanna

2012-02-01T23:59:59.000Z

423

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

424

THE EMPLOYEE'S GUIDE TO BENEFITS FOR THOSE AFFECTED BY REDUCTION IN FORCE  

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

EMPLOYEE'S EMPLOYEE'S THE EMPLOYEE'S THE EMPLOYEE'S THE EMPLOYEE'S GUIDE TO BENEFITS GUIDE TO BENEFITS GUIDE TO BENEFITS GUIDE TO BENEFITS FOR THOSE FOR THOSE FOR THOSE FOR THOSE AFFECTED BY AFFECTED BY AFFECTED BY AFFECTED BY REDUCTION IN REDUCTION IN REDUCTION IN REDUCTION IN FORCE FORCE FORCE FORCE U.S. OFFICE OF U.S. OFFICE OF U.S. OFFICE OF U.S. OFFICE OF PERSONNEL MANAGEMENT PERSONNEL MANAGEMENT PERSONNEL MANAGEMENT PERSONNEL MANAGEMENT WORKFORCE WORKFORCE WORKFORCE WORKFORCE RESTRUCTURING OFFICE RESTRUCTURING OFFICE RESTRUCTURING OFFICE RESTRUCTURING OFFICE OCTOBER 1999 (Revised) _________________________________________________________________________________________________ OPM Workforce Restructuring Office Employee's Guide to Separation Benefits (RIF) 2 The Office of Personnel Management (OPM) created the Workforce

425

E-Print Network 3.0 - affect narrative processes Sample Search...  

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

that narrative delivery affects people's perception and relationships. Beginning... the exploration. Interactive Process The following shows how the system begins the...

426

E-Print Network 3.0 - atrazine exposure affects Sample Search...  

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

Ecological Applications Vol. 18, No. 7 12;exposure affected the susceptibility of green frog tadpoles to E... loads are a product of both exposure and susceptibility, and...

427

E-Print Network 3.0 - affect employment duration Sample Search...  

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

Collection: Environmental Sciences and Ecology ; Engineering 71 A Quantitative Study of User Satisfaction in Online Video Streaming Summary: affect session duration are regarded as...

428

E-Print Network 3.0 - affecting natural gas Sample Search Results  

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

natural gas Search Powered by Explorit Topic List Advanced Search Sample search results for: affecting natural gas Page: << < 1 2 3 4 5 > >> 1 International Conference on Gas...

429

E-Print Network 3.0 - affecting fish passage Sample Search Results  

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

fish passage Search Powered by Explorit Topic List Advanced Search Sample search results for: affecting fish passage Page: << < 1 2 3 4 5 > >> 1 NOAA Restoration Center supports...

430

E-Print Network 3.0 - affect cement penetration Sample Search...  

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

Summary: of carbonation of cement-based products. The process of carbonation and the rate of carbonation penetration... were very important factors that affect rate of...

431

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

432

E-Print Network 3.0 - affects courtship gene Sample Search Results  

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

Collection: Environmental Sciences and Ecology 3 Experience improves courtship in male fruit flies REUVEN DUKAS Summary: , experience affected the courtship behaviour of male...

433

E-Print Network 3.0 - affects cognitive performance Sample Search...  

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

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.,...

434

Key Parameters Affecting DPF Performance Degradation and Impact on Lifetime Fuel Economy  

Broader source: Energy.gov [DOE]

Summarizes latest findings on impact of specific parameters affecting ash-related diesel particulate filter performance degradation and information useful to enhance performance and extend service life

435

E-Print Network 3.0 - affect oxidative stability Sample Search...  

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

stability. In particular, oxide non... in titania and thereby affect the performance of solar cell devices utilizing such ... Source: Kaxiras, Efthimios - School of Engineering and...

436

E-Print Network 3.0 - adversely affects oral Sample Search Results  

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

affects the egg distribution pattern in a polyembryonic... .. 12;Oral presentations and posters: 2000: - International Behavioral Ecology Congress (ISBE), Zrich... , CH...

437

E-Print Network 3.0 - affecting calcium translocation Sample...  

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

of strontium for calcium. This was only slightly affected by the concentration of the CaCl2-solution used... occurred indicating discrimination between strontium and calcium...

438

E-Print Network 3.0 - affect periparturient behaviour Sample...  

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

risk interact to affect the levels of individual antipredatory ... Source: Keogh, Scott - School of Botany and Zoology, Australian National University Collection:...

439

E-Print Network 3.0 - affecting nuclear waste Sample Search Results  

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

Powered by Explorit Topic List Advanced Search Sample search results for: affecting nuclear waste Page: << < 1 2 3 4 5 > >> 1 Nuclear Waste Assessment System for Technical...

440

E-Print Network 3.0 - affecting nuclear import Sample Search...  

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

Powered by Explorit Topic List Advanced Search Sample search results for: affecting nuclear import Page: << < 1 2 3 4 5 > >> 1 Institute for Critical Technology and Applied...

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

Los Alamos using NIH grant to study how social behaviors affect...  

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

Can social media messaging impact epidemics? Los Alamos using NIH grant to study how social behaviors affect spread of disease Connecting social media and epidemiological research...

442

E-Print Network 3.0 - affecting lilium crops Sample Search Results  

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

production Summary: affect the quality of energy crops, and so do not need to be treated. Recycling wastewater and other... ways to increase biomass production from energy crops...

443

E-Print Network 3.0 - affects durably bonding Sample Search Results  

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

adhesive layers are less affected, creep behavior of adhesively bonded joints... ABSTRACT SMITH, GLEN. Bond Characteristics and Qualifications of Adhesives for ... Source:...

444

FCV Learning Demonstration: First-Generation Vehicle Results and Factors Affecting Fuel Cell Degradation (Presentation)  

SciTech Connect (OSTI)

Presentaion on the FCV Learning Demonstration and factors affecting fuel cell degradation given at the Fuel Cell Seminar on October 17, 2007 in San Antonio, TX.

Wipke, K.; Sprik, S.; Kurtz, J.; Thomas, H.; Garbak, J.

2007-10-17T23:59:59.000Z

445

E-Print Network 3.0 - affects detection rate Sample Search Results  

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

AND OCEANIC SCIENCE The Effect ENSO Has on Lightning Summary: and relationships between lightning flash rates and convective meteorology and how climate change may affect......

446

E-Print Network 3.0 - affect achievement mediated Sample Search...  

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

and agents affect performance, how the load of tasks arriving at one ... Source: Massachusetts at Amherst, University of - Department of Computer Science, Multi-Agent Systems...

447

E-Print Network 3.0 - affecting clean coal Sample Search Results  

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

; Environmental Management and Restoration Technologies 24 Impact of coal quality and gasifier technology on IGCC performance Summary: was little affected by coal type. The slurry...

448

E-Print Network 3.0 - affect saprophagous diptera Sample Search...  

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

beetles (Coleoptera) in Carpathian oak forests Summary: ). The negative effects of forest management, especially the effects of conifer introductions, affected saprophage......

449

E-Print Network 3.0 - affect postoperative quality Sample Search...  

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

a consequence of surgery or a mechanism to enhance the intelligibility? Summary: F1 is also affected by the post-operative formant changes, these changes must, with...

450

E-Print Network 3.0 - affect political support Sample Search...  

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

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...

451

E-Print Network 3.0 - affect contraction-stimulated glucose Sample...  

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

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...

452

E-Print Network 3.0 - affects host cell Sample Search Results  

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

the evolution... - nomically-related hosts can affect, to some extent, the ... Source: Poulin, Robert - Department of Zoology, University of Otago Collection: Biology and Medicine...

453

E-Print Network 3.0 - affecting metal concentration Sample Search...  

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

Surface Precipitation of Hydrolyzable Metal Ions on Oxide Surfaces S. E. Fendorf Heavy metal... retention on solid surfaces is a primary determinant in affecting the environmental...

454

E-Print Network 3.0 - affective disorder life Sample Search Results  

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

Biology and Medicine 13 Influence of Sequence Changes and Environment on Intrinsically Disordered Proteins Summary: structural changes affecting the existence, position or...

455

E-Print Network 3.0 - affect insulin sensitivity Sample Search...  

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

nm. The temperature sensitivity... -nanoparticles was compared with insulin changing the particle size would affect the protein alone as a control (0.1% insulin... in the system...

456

E-Print Network 3.0 - atrophy affecting individuals Sample Search...  

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

Sample search results for: atrophy affecting individuals Page: << < 1 2 3 4 5 > >> 1 Brain . Author manuscript Posterior cingulate hypometabolism in early Alzheimers disease:...

457

E-Print Network 3.0 - affects mibg retention Sample Search Results  

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

constipation, functional fecal retention, and non-retentive fecal soiling. A... time. Boys and girls are equally affected. 12;Infant Dyschezia Dyschezia ... Source: Louisiana...

458

E-Print Network 3.0 - affecting recruitment dynamics Sample Search...  

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

search results for: affecting recruitment dynamics Page: << < 1 2 3 4 5 > >> 1 Climate change effects on rangeland resources Summary: Moffet USDA-ARS 12;Population dynamics...

459

How the pitch of a holey optical fiber affects its lightguide properties  

Science Journals Connector (OSTI)

This paper discusses how scaling (increasing) the transverse dimensions of a holey optical quartz fiber affects its lightguide properties. It is established that a limiting pitch...

Dukel'skii, K V; Kondrat'ev, Yu N; Komarov, A V; Ter-Nersesyants, E V; Khokhlov, A V; Shevandin, V S

2006-01-01T23:59:59.000Z

460

E-Print Network 3.0 - affects life history Sample Search Results  

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

41 Animal personalities and the divergence of life histories Summary: how life- history decisions that have already been made affect the costs and benefits of deci- sions......

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

E-Print Network 3.0 - affected children independent Sample Search...  

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

Families and Children is an independent, non- partisan 501(c)(3) non... attachment theory and research to inform decisions affecting the placements of ... Source: McQuade,...

462

E-Print Network 3.0 - affects foraging behavior Sample Search...  

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

for consumers of multiple resources Summary: ). Food chemistry may also affect foraging decisions through its influence on resource allocation... little attention in optimal...

463

E-Print Network 3.0 - affects bone parameters Sample Search Results  

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

of bone quality will ultimately affect physical and morpho- logic parameters... fracture rates are most closely associated with ... Source: Rubin, Clinton T.- Department of...

464

E-Print Network 3.0 - affecting cardiac fibrosis Sample Search...  

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affecting cardiac fibrosis Page: << < 1 2 3 4 5 > >> 1 Reversible cardiac fibrosis and heart failure induced by conditional expression of an antisense mRNA of the...

465

E-Print Network 3.0 - affect water relations Sample Search Results  

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

corrosive water affects the entire household plumbing system... on water testing and treatment and issues ... Source: Liskiewicz, Maciej - Institut fr Theoretische Informatik,...

466

E-Print Network 3.0 - affects water relations Sample Search Results  

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

corrosive water affects the entire household plumbing system... on water testing and treatment and issues ... Source: Liskiewicz, Maciej - Institut fr Theoretische Informatik,...

467

E-Print Network 3.0 - affect glucose disposal Sample Search Results  

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

glucoseinsulin regulatory system and ultradian Summary: the changes of the glucose infusion rate affect the sustained oscillations. Fig. 11 demonstrates... Journal of...

468

E-Print Network 3.0 - adversely affect development Sample Search...  

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

conditions. The U.S. alone is operating several hun- dred spacecraft today. Space weather can adversely... affect satellite operations, commu- nications, space-based and...

469

E-Print Network 3.0 - affecting seed yield Sample Search Results  

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

and size distribution. Seed... for scab, sanitation is the best defense, storage of potato seed tubers before and after cutting can affect... plant ... Source: Liskiewicz,...

470

E-Print Network 3.0 - affect thermal dissipation Sample Search...  

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

10 In the design of high-performance computer systems, power and temperature Summary: and remote routers affects that router's temperature. Because each router's power and thermal...

471

E-Print Network 3.0 - affects protein synthesis Sample Search...  

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

Molecular Biology, Uppsala University, Sweden Summary: , inhibit ribosome assisted protein folding (in vitro), but do not affect protein 12;synthesis... the role of the ribosome...

472

E-Print Network 3.0 - affecting protein folding Sample Search...  

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

protein folding Search Powered by Explorit Topic List Advanced Search Sample search results for: affecting protein folding Page: << < 1 2 3 4 5 > >> 1 Current status of membrane...

473

E-Print Network 3.0 - affect microtubule dynamics Sample Search...  

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

polymeric filaments that provide architectural support and also participate Summary: are interrelated, such that the dynamics of one type of filament can affect the dynam- ics of...

474

An adult accelerated degree program| Student and instructor perspectives and factors that affect retention.  

E-Print Network [OSTI]

?? This was a blended qualitative and quantitative study, which investigated adult student and instructor perspectives, motivators, factors and life events that have affected adult… (more)

Manjounes, Cindy K.

2010-01-01T23:59:59.000Z

475

E-Print Network 3.0 - affective function review Sample Search...  

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

of interest that are relevant to the functions to be performed in the course of the peer review... as affecting your judgment in matters within the assigned ... Source:...

476

Seeing the Invisible: Educating the Public on Planetary Magnetic Fields and How they Affect Atmospheres  

E-Print Network [OSTI]

Seeing the Invisible: Educating the Public on Planetary Magnetic Fields and How they Affect to visualize ­ invisible · But planetary magnetic field and charged particle environments (magnetospheres

Fillingim, Matthew

477

E-Print Network 3.0 - affects short-term recovery Sample Search...  

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

Obviously if the outdated node crashes the recovery process ends... , and how it is affected by the linear recovery interaction. The following section is devoted... present...

478

E-Print Network 3.0 - arctic populations affects Sample Search...  

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

prohibit, commercial fishing for Arctic fish and to ensure subsistence fishing is not affected... and uncertain population dynamics and abundance. Under the ... Source: NOAA Marine...

479

E-Print Network 3.0 - affecting bacterial community Sample Search...  

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

Summary: of soil bacteria and documenting how soil bacterial communities are affected by specific environmental... The diversity and biogeography of soil bacterial...

480

E-Print Network 3.0 - affects regional precipitation Sample Search...  

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

Summary: of precipitation trends over the two regions, as they are also directly affected by the South Asian monsoon... Regional summer precipitation events in Asia and their...

Note: This page contains sample records for the topic "affects subsequent fragmentation" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


481

E-Print Network 3.0 - abiotic factors affecting Sample Search...  

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

biota (i.e. Structural change causes abiotic change; see above). In the first... is affected solely by the abiotic ... Source: Byers, James "Jeb" - School of Ecology, University...

482

E-Print Network 3.0 - affect calcium handling Sample Search Results  

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

of Health, Safety and Environment Summary: ) Irrigate with water. b) Submerge affected finger(s) in the 23% calcium gluconate solution. c) Add ice... and then apply calcium...

483

E-Print Network 3.0 - affects leaf nutrition Sample Search Results  

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

). Trichoplusia ni Preference for Nicotiana tabacum. Leaf position signicantly affected T. ni consumption (F 4... and de- velopmental rates, is new. C. scripta feeding was...

484

E-Print Network 3.0 - affected zones exposed Sample Search Results  

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

shore zone. Especially if water levels fluctuate... ). Shore zone animals also are affected by the ... Source: Strayer, David L. - Cary Institute of Ecosystem Studies...

485

E-Print Network 3.0 - affect headwater stream Sample Search Results  

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

than... . Relative to larger streams and rivers that are fed by upstream networks and affected by cumulative upstream... by headwater streams, ... Source: Lowe, Winsor H. -...

486

E-Print Network 3.0 - affects stomatal conductance Sample Search...  

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

total daily water use, estimates of mean daily stomatal conductance were not affected... on a leaf varies constantly, the rate of change in ... Source: Teskey, Robert O. -...

487

E-Print Network 3.0 - affecting eggshell quality Sample Search...  

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

Captive American kestrels (Falco sparverius) were bred for one... . EMF exposure affected reproductive success of kestrels, increasing fertility, egg size, embryonic Source:...

488

E-Print Network 3.0 - agricultural practices affecting Sample...  

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

area. Agricultural... ? 12;Huge amount of area > of earth's terrestrial surface affected by agriculture 13 agriculture... Integrating Conservation and Agriculture Stacy...

489

E-Print Network 3.0 - affective lability scale Sample Search...  

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

to the author for internal non-commercial research Summary: not significantly affected by warming. For all measured pools, only labile and microbial biomass C fractions...

490

E-Print Network 3.0 - affects microbial activity Sample Search...  

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

products and affect bacteria composition ... Source: Jawitz, James W. - Soil and Water Science Department, University of Florida Collection: Environmental Sciences and...

491

E-Print Network 3.0 - affected granular soils Sample Search Results  

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

platy, prismlike, and blocklike (see Figure 3... ). Soil structure affects soil water movement when a soil is saturated with water. Water can move quickly... between...

492

E-Print Network 3.0 - affect ecosystem metabolism Sample Search...  

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

America Summary: . Stoichiometry of the net ecosystem metabolism in a coastal inlet affected by upwelling. The Ria de Arousa (NW... act as resource subsidies to many...

493

E-Print Network 3.0 - affect aggregate turnover Sample Search...  

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

of GRSP research has focused on its relationship with aggregate water stability... ecosystem warming positively affects arbuscular mycor- rhizae but ... Source: Rilli, Matthias...

494

E-Print Network 3.0 - affecting phytoplankton growth Sample Search...  

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

on the growth of brackish water phytoplankton but that different algal groups may be affected... underwater light intensity of the freshwater tidal reaches, growth of...

495

AFFECT Notice of Intent June 27, 2013 CO and Legal Comments July 3, 2013  

Broader source: Energy.gov [DOE]

Document details the Assisting Federal Facilities with Energy Conservation Technologies (AFFECT) Notice of Intent on June 27, 2013 and the legal comments on July 3, 2013.

496

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

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

Collection: Mathematics 2 Soil Quality Information Sheet Rangeland Soil Quality--Water Erosion Summary: and in roadbeds. Many vegetation and soil properties affect the risk...

497

E-Print Network 3.0 - affecting female fertility Sample Search...  

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

in the behavior and Summary: Abstract I will determine how female breeding coloration (FBC) affects mate choice by male long... and fertilization take place during ovulation...

498

E-Print Network 3.0 - affect oviposition preference Sample Search...  

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

c-album Correspondence... it is clear that plant availability does affect host and patch preference on larger spatial scales (Thomas... ' willingness to oviposit on a plant...

499

E-Print Network 3.0 - affects browning susceptibility Sample...  

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

Multidisciplinary Databases and Resources 4 Turfgrass Disease Profiles Brown Patch Summary: with brown margins occur on all affected grass species but are most evident...

500

E-Print Network 3.0 - affects understorey plant Sample Search...  

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

vascular plant diversity... of mea- surement) at a fine scale (representing a patch or neighbour- hood scale for understorey plants... allowed to affect light...