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1

On Type II Strings in Two Dimensions  

E-Print Network (OSTI)

We consider type IIA/B strings in two-dimensions and their projection with respect to the nilpotent space-time supercharge. Based on the ground ring structure, we propose a duality between perturbed type II strings and the topological B-model on deformed Calabi-Yau singularities. Depending on the type II spectra, one has either the conifold or the suspended pinch point geometry. Using the corresponding quiver gauge theory, obtained by D-branes wrapping in the resolved suspended pinch point geometry, we propose the all orders perturbative partition function.

Harald Ita; Harald Nieder; Yaron Oz

2005-02-21T23:59:59.000Z

2

Duality Phase Transition in Type I String Theory  

E-Print Network (OSTI)

We show that the duality phase transition in the unoriented type I theory of open and closed strings is_first order_. The order parameter is the semiclassical approximation to the heavy quark-antiquark potential at finite temperature, extracted from the covariant off-shell string amplitude with Wilson loop boundaries wrapped around the Euclidean time direction. Remarkably, precise calculations can be carried out on either side of the phase boundary at the string scale T_C = 1/2\\pi \\alpha^{'1/2} by utilizing the T-dual, type IB and type I', descriptions of the short string gas of massless gluon radiation. We will calculate the change in the duality transition temperature in the presence of an electromagnetic background field.

Shyamoli Chaudhuri

2005-02-15T23:59:59.000Z

3

STRING  

E-Print Network (OSTI)

This document describes the STRING programming language which has been implemented on the MAC Artificial Group's PDP-6 computer. In the STRING system, all objects--constants, variables, functions and programs--are ...

Samson, Peter

1967-09-01T23:59:59.000Z

4

KO-Homology and Type I String Theory.  

E-Print Network (OSTI)

We study the classification of D-branes and Ramond-Ramond fields in Type I string theory by developing a geometric description of KO-homology. We define an analytic version of KO-homology using KK-theory of real C*-algebras, and construct explicitly the isomorphism between geometric and analytic KO-homology. The construction involves recasting the Cl(n)-index theorem and a certain geometric invariant into a homological framework which is used, along with a definition of the real Chern character in KO-homology, to derive cohomological index formulas. We show that this invariant also naturally assigns torsion charges to non-BPS states in Type I string theory, in the construction of classes of D-branes in terms of topological KO-cycles. The formalism naturally captures the coupling of Ramond-Ramond fields to background D-branes which cancel global anomalies in the string theory path integral. We show that this is related to a physical interpretation of bivariant KK-theory in terms of decay processes on spacetime-filling branes. We also provide a construction of the holonomies of Ramond-Ramond fields in Type II string theory in terms of topological K-chains.

5

Template:Incentive Type Page Query | Open Energy Information  

Open Energy Info (EERE)

Incentive Type Page Query Jump to: navigation, search This is the 'Incentive Type Page Query' template. If limitrec is not included, default is 1000. limitrec is only for the...

6

D-brane Instantons in Type II String Theory  

Science Conference Proceedings (OSTI)

We review recent progress in determining the effects of D-brane instantons in N=1 supersymmetric compactifications of Type II string theory to four dimensions. We describe the abstract D-brane instanton calculus for holomorphic couplings such as the superpotential, the gauge kinetic function and higher fermionic F-terms. This includes a discussion of multi-instanton effects and the implications of background fluxes for the instanton sector. Our presentation also highlights, but is not restricted to the computation of D-brane instanton effects in quiver gauge theories on D-branes at singularities. We then summarize the concrete consequences of stringy D-brane instantons for the construction of semi-realistic models of particle physics or SUSY-breaking in compact and non-compact geometries.

Blumenhagen, Ralph; /Munich, Max Planck Inst.; Cvetic, Mirjam; /Pennsylvania U.; Kachru, Shamit; /Stanford U., Phys. Dept. /SLAC; Weigand, Timo; /SLAC

2009-06-19T23:59:59.000Z

7

Infinity Cancellation, Type I ? Compactification and String S-Matrix Functional 1  

E-Print Network (OSTI)

Nonvanishing tadpoles and possible infinities associated in the multiparticle amplitudes are discussed with regard to the disk and RP 2 diagrams of the Type I ? compactification. We find that the infinity cancellation of SO(32) type I theory extends to this case as well despite the presence of tadpoles localized in the D-brane worldvolume and the orientifold surfaces. Formalism of string S-matrix generating functional is presented to find a consistent string background as c-number source function: we find this only treats the cancellation of the tadpoles in the linearized approximation. Our formalism automatically provides representation of the string amplitudes on this background to all orders in ? ?. 1

Y. Arakane; H. Itoyama; H. Kunitomo; A. Tokura

1996-01-01T23:59:59.000Z

8

String | Open Energy Information  

Open Energy Info (EERE)

View View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Special page Facebook icon Twitter icon » String Jump to: navigation, search Properties of type "String" Showing 200 properties using this type. (previous 200) (next 200) A Property:Abbreviation Property:Achievement Date Property:Address Property:Agency Property:AlternativeIngredient Property:AreaGeology Property:Audience Property:Author Property:Authority B Property:BLM CaseStatus Property:BLM LeaseStatus Property:Bandwidth(kHz) Property:Beam(m) Property:BrineConstituents Property:Building/Boundaries Property:Building/Category Property:Building/OwnershipCategory Property:Building/SPBreakdownOfElctrcityUseKwhM2AirCompressors Property:Building/SPBreakdownOfElctrcityUseKwhM2CirculationFans

9

Property:Buildings/PublicationType | Open Energy Information  

Open Energy Info (EERE)

Property Edit with form History Facebook icon Twitter icon Property:BuildingsPublicationType Jump to: navigation, search This is a property of type String. Pages using the...

10

Magnetic Bianchi type II string cosmological model in loop quantum cosmology  

E-Print Network (OSTI)

The loop quantum cosmology of the Bianchi type II string cosmological model in the presence of a homogeneous magnetic field is studied. We present the effective equations which provide modifications to the classical equations of motion due to quantum effects. The numerical simulations confirm that the big bang singularity is resolved by quantum gravity effects.

Victor Rikhvitsky; Bijan Saha; Mihai Visinescu

2013-12-09T23:59:59.000Z

11

Phenomenology of heterotic and type II orientifold string models  

E-Print Network (OSTI)

Cryptons are metastable bound states of fractionally-charged particles that arise generically in the hidden sectors of models derived from heterotic string. We study their properties and decay modes in a speci?c ?ipped SU(5) model with long-lived four-particle spin-zero bound states called tetrons. The expected masses and lifetimes of the neutral tetrons make them good candidates for cold dark matter (CDM), and a potential source of the ultra-high energy cosmic rays (UHECRs) which have been observed, whereas the charged tetrons would have decayed in the early Universe. We calculate the spectra of ultra-high-energy cosmic rays (UHECRs) in an ex¬plicit top-down model based on the decays of metastable neutral ‘crypton’ states. For all the decay operators, the total UHECR spectra are compatible with the available data. Also, the fractions of photons are compatible with all the published upper limits, but may be detectable in future experiments. We also construct several intersecting D-brane models on a variety of orientifold backgrounds. In particular, we construct ?ipped SU(5), Pati-Salam, and MSSM-like models. The phenomenological properties of these models are studied. For one model in particular, we ?nd that we may explain the quark masses and mixings, the tau lepton mass, and generate small neutrino masses via the see-saw mechanism.

Mayes, Van Eric

2007-08-01T23:59:59.000Z

12

Property:Incentive/StartDateString | Open Energy Information  

Open Energy Info (EERE)

StartDateString StartDateString Jump to: navigation, search Property Name Incentive/StartDateString Property Type String Description Start Date string property. Use this property in queries until the Property:Incentive/StartDate property is populated with valid dates only. Currently, some are populated with additional notes included. Pages using the property "Incentive/StartDateString" Showing 25 pages using this property. (previous 25) (next 25) 3 30% Business Tax Credit for Solar (Vermont) + 01/01/2009 + A AEP Appalachian Power - Commercial and Industrial Rebate Programs (West Virginia) + 3/11/2011 + AEP Appalachian Power - Residential Home Retrofit Program (West Virginia) + 3/11/2011 + AEP Ohio - Commercial Self Direct Rebate Program (Ohio) + 1/1/2008 +

13

Property:Incentive/ExpireDtString | Open Energy Information  

Open Energy Info (EERE)

ExpireDtString ExpireDtString Jump to: navigation, search Property Name Incentive/ExpireDtString Property Type String Description Expiration Date string property. Use this property in queries until the Property:Incentive/ExpireDt property is populated with valid dates only. Currently, some are populated with additional notes included. Pages using the property "Incentive/ExpireDtString" Showing 25 pages using this property. (previous 25) (next 25) A AEP Ohio - Commercial Self Direct Rebate Program (Ohio) + 12/15/2013 + AEP Ohio - Renewable Energy Technology Program (Ohio) + 06/30/2013 + Agricultural Biomass to Energy Program (California) + 6/30/04 + Agricultural Energy Efficiency Program (New York) + 12/01/2015 + Agricultural Lighting and Equipment Rebate Program (Vermont) + 06/30/2013 +

14

Topology of the hypermultiplet moduli space in type II/CY string vacua  

Science Conference Proceedings (OSTI)

By analyzing qualitative aspects of NS5-brane instanton corrections, we determine the topology of the hypermultiplet moduli space M{sub H} in Calabi-Yau compactifications of type II string theories at fixed value of the dilaton and of the Calabi-Yau metric. Specifically, we show that for fivebrane instanton couplings to be well-defined, translations along the intermediate Jacobian must induce nontrivial shifts of the Neveu-Schwarz axion which had thus far been overlooked. As a result, the Neveu-Schwarz axion parametrizes the fiber of a circle bundle, isomorphic to the one in which the fivebrane partition function is valued. In a companion paper, we go beyond the present analysis and take steps towards a quantitative description of fivebrane instanton corrections, using a combination of mirror symmetry, S-duality, topological string theory and twistor techniques.

Alexandrov, Sergei [Laboratoire de Physique Theorique, Astroparticules, CNRS UMR 5207, Universite Montpellier II, 34095 Montpellier Cedex 05 (France); Persson, Daniel [Institut fuer Theoretische Physik, ETH Zuerich, CH-8093 Zuerich (Switzerland); Pioline, Boris [Laboratoire de Physique Theorique et Hautes Energies, CNRS UMR 7589, Universite Pierre et Marie Curie, 4 place Jussieu, 75252 Paris Cedex 05 (France)

2011-01-15T23:59:59.000Z

15

Type IIB Orientifolds, F-theory, Type I Strings on Orbifolds and Type I - Heterotic Duality  

E-Print Network (OSTI)

We consider six and four dimensional ${\\cal N}=1$ supersymmetric orientifolds of Type IIB compactified on orbifolds. We give the conditions under which the perturbative world-sheet orientifold approach is adequate, and list the four dimensional ${\\cal N}=1$ orientifolds (which are rather constrained) that satisfy these conditions. We argue that in most cases orientifolds contain non-perturbative sectors that are missing in the world-sheet approach. These non-perturbative sectors can be thought of as arising from D-branes wrapping various collapsed 2-cycles in the orbifold. Using these observations, we explain certain ``puzzles'' in the literature on four dimensional orientifolds. In particular, in some four dimensional orientifolds the ``naive'' tadpole cancellation conditions have no solution. However, these tadpole cancellation conditions are derived using the world-sheet approach which we argue to be inadequate in these cases due to appearance of additional non-perturbative sectors. The main tools in our analyses are the map between F-theory and orientifold vacua and Type I-heterotic duality. Utilizing the consistency conditions we have found in this paper, we discuss consistent four dimensional chiral ${\\cal N}=1$ Type I vacua which are non-perturbative from the heterotic viewpoint.

Zurab Kakushadze; Gary Shiu; S. -H. Henry Tye

1998-04-13T23:59:59.000Z

16

Cosmic Strings in Supergravity  

E-Print Network (OSTI)

It is pointed out that various types of cosmic string solutions that exist in nonsupersymmetric and globally supersymmetric theories, such as D-type gauge strings, F-type global and gauge strings, and superconducting Witten strings, also exist in supergravity models. When the D term and superpotential satisfy some simple conditions allowing the determination of a set of vacuum states with nontrivial topology, the existence of a string embedded within a supersymmetric vacuum with vanishing cosmological constant can be inferred. Supergravity also admits other string solutions, some of which have no counterparts in globally supersymmetric theories.

J. R. Morris

1997-06-09T23:59:59.000Z

17

Magnetized Bianchi Type $VI_{0}$ Barotropic Massive String Universe with Decaying Vacuum Energy Density $?$  

E-Print Network (OSTI)

Bianchi type $VI_{0}$ massive string cosmological models using the technique given by Letelier (1983) with magnetic field are investigated. To get the deterministic models, we assume that the expansion ($\\theta$) in the model is proportional to the shear ($\\sigma$) and also the fluid obeys the barotropic equation of state. It was found that vacuum energy density $\\Lambda \\propto \\frac{1}{t^{2}}$ which matches with natural units. The behaviour of the models from physical and geometrical aspects in presence and absence of magnetic field is also discussed.

Anirudh Pradhan; Raj Bali

2008-05-22T23:59:59.000Z

18

String Solitons  

E-Print Network (OSTI)

We review the status of solitons in superstring theory, with a view to understanding the strong coupling regime. These {\\it solitonic} solutions are non-singular field configurations which solve the empty-space low-energy field equations (generalized, whenever possible, to all orders in $\\alpha'$), carry a non-vanishing topological "magnetic" charge and are stabilized by a topological conservation law. They are compared and contrasted with the {\\it elementary} solutions which are singular solutions of the field equations with a $\\sigma$-model source term and carry a non-vanishing Noether "electric" charge. In both cases, the solutions of most interest are those which preserve half the spacetime supersymmetries and saturate a Bogomol'nyi bound. They typically arise as the extreme mass=charge limit of more general two-parameter solutions with event horizons. We also describe the theory {\\it dual} to the fundamental string for which the roles of elementary and soliton solutions are interchanged. In ten spacetime dimensions, this dual theory is a superfivebrane and this gives rise to a string/fivebrane duality conjecture according to which the fivebrane may be regarded as fundamental in its own right, with the strongly coupled string corresponding to the weakly coupled fivebrane and vice-versa. After compactification to four spacetime dimensions, the fivebrane appears as a magnetic monopole or a dual string according as it wraps around five or four of the compactified dimensions. This gives rise to a four-dimensional string/string duality conjecture which subsumes a Montonen-Olive type duality in that the magnetic monopoles of the fundamental string correspond to the electric winding states of the dual string. This leads to a {\\it duality of dualities} whereby under string/string duality the the strong/weak coupling $S$-duality trades places with the minimum/maximum length $T$-duality. Since these magnetic monopoles are extreme black holes, a prediction of $S$-duality is that the corresponding electric massive states of the fundamental string are also extreme black holes.

M. J. Duff; Ramzi R. Khuri; J. X. Lu

1994-12-22T23:59:59.000Z

19

Mirage Models Confront the LHC: II. Flux-Stabilized Type IIB String Theory  

E-Print Network (OSTI)

We continue the study of a class of string-motivated effective supergravity theories in light of current data from the CERN Large Hadron Collider (LHC). In this installment we consider Type IIB string theory compactified on a Calabi-Yau orientifold in the presence of fluxes, in the manner originally formulated by Kachru, et al. We allow for a variety of potential uplift mechanisms and embeddings of the Standard Model field content into D3 and D7 brane configurations. We find that an uplift sector independent of the Kahler moduli, as is the case with anti-D3 branes, is inconsistent with data unless the matter and Higgs sectors are localized on D7 branes exclusively, or are confined to twisted sectors between D3 and D7 branes. We identify regions of parameter space for all possible D-brane configurations that remain consistent with PLANCK observations on the dark matter relic density and measurements of the CP-even Higgs mass at the LHC. Constraints arising from LHC searches at 8 TeV center-of-mass energies, and the LUX dark matter detection experiment, are discussed. The discovery prospects for the remaining parameter space at dark matter direct detection experiments are described, and signatures for detection of superpartners at the LHC, with center-of-mass energy of 14 TeV, are analyzed.

Bryan Kaufman; Brent D. Nelson

2013-12-23T23:59:59.000Z

20

Bianchi Type-II String Cosmological Models in Normal Gauge for Lyra's Manifold with Constant Deceleration Parameter  

E-Print Network (OSTI)

The present study deals with a spatially homogeneous and anisotropic Bianchi-II cosmological models representing massive strings in normal gauge for Lyra's manifold by applying the variation law for generalized Hubble's parameter that yields a constant value of deceleration parameter. The variation law for Hubble's parameter generates two types of solutions for the average scale factor, one is of power-law type and other is of the exponential form. Using these two forms, Einstein's modified field equations are solved separately that correspond to expanding singular and non-singular models of the universe respectively. The energy-momentum tensor for such string as formulated by Letelier (1983) is used to construct massive string cosmological models for which we assume that the expansion ($\\theta$) in the model is proportional to the component $\\sigma^{1}_{~1}$ of the shear tensor $\\sigma^{j}_{i}$. This condition leads to $A = (BC)^{m}$, where A, B and C are the metric coefficients and m is proportionality constant. Our models are in accelerating phase which is consistent to the recent observations. It has been found that the displacement vector $\\beta$ behaves like cosmological term $\\Lambda$ in the normal gauge treatment and the solutions are consistent with recent observations of SNe Ia. It has been found that massive strings dominate in the decelerating universe whereas strings dominate in the accelerating universe. Some physical and geometric behaviour of these models are also discussed.

Shilpi Agarwal; R. K. Pandey; Anirudh Pradhan

2010-10-07T23:59:59.000Z

Note: This page contains sample records for the topic "type string pages" 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

Exactly Soluble Dynamics of (p,q) String Near Macroscopic Fundamental Strings  

E-Print Network (OSTI)

We study dynamics of Type IIB bound-state of a Dirichlet string and n fundamental strings in the background of N fundamental strings. Because of supergravity potential, the bound-state string is pulled to the background fundamental strings, whose motion is described by open string rolling radion field. The string coupling can be made controllably weak and, in the limit $1 fundamental string constituents.

Dongsu Bak; Soo-Jong Rey; Ho-Ung Yee

2004-11-09T23:59:59.000Z

22

Page  

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

of of Page This final rule arnentis the Department's DOE must p>st synopses of program announcements of funding opportunities and modification; to these announcements at the Grants.gov FIND Internet site, using the standard dau. elements/format. DOE implemented this requirement in Financial Assistance Letter (pAL) 2003-O3R, 10/28/03. As of the effi~ctive date of this rule - March 22, 2004, DOE is no longer required to publish separate notices of funding opportunities in the Federal Register. DOE must u:re the government-wide standard format to publish program announceme:tlts of funding opportunities. DOE implemented this requirement in F AL 2003-03R, 10/28/03. (See the financial assistance announcement of funding opportunity 1emplate on the Professionals Homepage)

23

String operations in orientable open-closed string topology  

E-Print Network (OSTI)

To open-closed cobordism surfaces labeled by closed orientable submanifolds, orientable open-closed string topology associates (degree zero) string operations determined up to sign, which depend only on homeomorphism types of surfaces and which satisfy sewing property. In orientable open-closed string topology, we show that most string operations vanish. We describe those open-closed cobordisms with vanishing string operations, and give a short list of open-closed cobordisms with possibly nontrivial string operations. To prove the above vanishing results, we give a systematic discussion of properties of transfer maps.

Tamanoi, Hirotaka

2008-01-01T23:59:59.000Z

24

Help from the strings  

E-Print Network (OSTI)

"How can the nature of basic particles be defined beyond the mechanisms presiding over their creation? Besides the standard model of particle physics - resulting from the postulations of quantum mechanics - contemporary science has pinned its hopes on the totally new unifying notion provided by the highly mathematical string theory."(2 pages)

2007-01-01T23:59:59.000Z

25

Query-Structure Based Web Page Indexing  

Science Conference Proceedings (OSTI)

... In Proc. 8th International Symposium on String Processing and Information Retrieval (SPIRE 2001), pages 33-45, San Rafael, Chile, 2001. ...

2013-02-12T23:59:59.000Z

26

Online Particle Physics Information - Specialized Subject Pages  

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

of relativity such as: cosmology, black holes, cosmic strings, inflation, and quantum gravity. Provides links to movies, research-level home pages and to Stephen Hawking's Web...

27

The string string theorists forgot to notice  

E-Print Network (OSTI)

A conjecture formulated by Henri Poincare in 1912 suggests that Max Planck's elementary quantum of action constitutes an authentic "atom of motion". When the conjecture is implemented, the resulting entity, the xon, becomes "the string string theorists forgot to notice". If a string exists in Nature, then string theoretical research should be pursued.

Jean-Paul Auffray

2007-11-20T23:59:59.000Z

28

The string string theorists forgot to notice  

E-Print Network (OSTI)

A conjecture formulated by Henri Poincare in 1912 suggests that Max Planck's elementary quantum of action constitutes an authentic "atom of motion". When the conjecture is implemented, the resulting entity, the xon, becomes "the string string theorists forgot to notice". If a string exists in Nature, then string theoretical research should be pursued.

Auffray, Jean-Paul

2007-01-01T23:59:59.000Z

29

Closed-String Tachyon Condensation and the Worldsheet Super-Higgs Effect  

E-Print Network (OSTI)

For example, in Type 0 string the- ory in the presence ofClosed-String Tachyon Condensation and the Worldsheet Super-of California. Closed-String Tachyon Condensation and the

Horava, Petr

2008-01-01T23:59:59.000Z

30

String Gas Baryogenesis  

E-Print Network (OSTI)

We describe a possible realization of the spontaneous baryogenesis mechanism in the context of extra-dimensional string cosmology and specifically in the string gas scenario.

G. L. Alberghi

2010-02-19T23:59:59.000Z

31

Introduction to String Theory  

E-Print Network (OSTI)

The aim of these notes is to give recent developments in string theory. In particular, we discuss the string spectrums, compactifications, brane physics and dualities.

Belhaj, Adil

2008-01-01T23:59:59.000Z

32

String Gas Baryogenesis  

E-Print Network (OSTI)

We describe a possible realization of the spontaneous baryogenesis mechanism in the context of extra-dimensional string cosmology and specifically in the string gas scenario.

Alberghi, G L

2010-01-01T23:59:59.000Z

33

String (Faden) Theorie  

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

String Theory Ungelste Rtsel String (Faden) Theorie Die heutige Physik kennt gute Theorien wie Quantenmechanik, Relativittstheorie und Gravitation. Aber diese Theorien passen...

34

String gas baryogenesis  

Science Conference Proceedings (OSTI)

We describe a possible realization of the spontaneous baryogenesis mechanism in the context of extra-dimensional string cosmology and specifically in the string gas scenario.

Alberghi, G. L. [Physics Department, Bologna University, I.N.F.N. Bologna (Italy)

2010-05-15T23:59:59.000Z

35

The Static String  

E-Print Network (OSTI)

In this article the quantum fluctuation of a rigid and static string is reported to be identical to a free quantum particle. Solutions similar to this static string have already been found in the semi-classical quantizaton of pulsating strings, and our results show that the semi-classical quantization of pulsating strings is, in some cases, a perturbation of static strings. We also interpret the energy of the static string as a lower bound for the pulsating string and speculate about a description of quantum mechanics in terms of semi-classical string theory.

Giardino, Sergio

2013-01-01T23:59:59.000Z

36

Cosmic global strings  

SciTech Connect

This paper discusses the following topics: Global Strings; The Gravitational field of a straight global string; How do global strings behave The axion cosmological energy density; Computer simulations of the motion and decay of global strings; and Electromagnetic radiation from the conversion of Nambu-Goldstone bosons in astrophysical magnetic fields.

Sikivie, P. (Florida Univ., Gainesville, FL (USA). Dept. of Physics)

1990-01-01T23:59:59.000Z

37

String Gas Cosmology  

E-Print Network (OSTI)

String gas cosmology is a string theory-based approach to early universe cosmology which is based on making use of robust features of string theory such as the existence of new states and new symmetries. A first goal of string gas cosmology is to understand how string theory can effect the earliest moments of cosmology before the effective field theory approach which underlies standard and inflationary cosmology becomes valid. String gas cosmology may also provide an alternative to the current standard paradigm of cosmology, the inflationary universe scenario. Here, the current status of string gas cosmology is reviewed.

Brandenberger, Robert H

2009-01-01T23:59:59.000Z

38

Lectures on String Theory  

E-Print Network (OSTI)

This is a one semester course on bosonic string theory aimed at beginning graduate students. The lectures assume a working knowledge of quantum field theory and general relativity. Contents: 1. The Classical String 2. The Quantum String 3. Open Strings and D-Branes 4. Introducing Conformal Field Theory 5. The Polyakov Path Integral and Ghosts 6. String Interactions 7. The Low-Energy Effective Action 8. Compactification and T-Duality

Tong, David

2009-01-01T23:59:59.000Z

39

Cosmological Consequences of String Axions  

E-Print Network (OSTI)

2005 Cosmological Consequences of String Axions ? Ben Kain †for the model independent string axion we consider thefor two additional string axions. We do so independent of

Kain, Ben

2005-01-01T23:59:59.000Z

40

From String Nets to Nonabelions  

E-Print Network (OSTI)

Les Houches 1988, Fields, Strings and Critical Phenomena.take: ?rst, cut the degrees of freedom to string nets, thenmake the string nets ?uctuate appropriately to gain isotopy

Fidkowski, Lukasz; Freedman, Michael; Nayak, Chetan; Walker, Kevin; Wang, Zhenghan

2009-01-01T23:59:59.000Z

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


41

1 String field theory  

E-Print Network (OSTI)

This elementary introduction to string field theory highlights the features and the limitations of this approach to quantum gravity as it is currently understood. String field theory is a formulation of string theory as a field theory in space-time with an infinite number of massive fields. Although existing constructions of string field theory require expanding around a fixed choice of space-time background, the theory is in principle background-independent, in the sense that different backgrounds can be realized as different field configurations in the theory. String field theory is the only string formalism developed so far which, in principle, has the potential to systematically address questions involving multiple asymptotically distinct string backgrounds. Thus, although it is not yet well defined as a quantum theory, string field theory may eventually be helpful for understanding questions related to cosmology in string theory. 1.1

W. Taylor

2006-01-01T23:59:59.000Z

42

Property:Document type | Open Energy Information  

Open Energy Info (EERE)

Document type Document type Jump to: navigation, search Property Name Document type Property Type String Description The type of document as a string. This property is used by a variety of concepts including Reference Materials and may contain document types appropriate for multiple concepts. Allows Values Book;Book Review;Book Section;Conference Paper;Conference Proceedings;General;Info Graphic/Map/Chart;Journal Article;Legal;Memorandum;Periodical;Personal Communication;Poster;Report;Thesis/Dissertation;Web Site Pages using the property "Document type" Showing 25 pages using this property. (previous 25) (next 25) 2 2-D Magnetotellurics At The Geothermal Site At Soultz-Sous-Forets- Resistivity Distribution To About 3000 M Depth + Journal Article + 2.8-Ma Ash-Flow Caldera At Chegem River In The Northern Caucasus Mountains (Russia), Contemporaneous Granites, And Associated Ore Deposits + Journal Article +

43

Spin-string interaction in QCD strings  

Science Conference Proceedings (OSTI)

I consider the question of the interaction between a QCD string and the spin of a quark or an antiquark on whose worldline the string terminates. The problem is analyzed from the point of view of a string representation for the expectation value of a Wilson loop for a spin-half particle. A string representation of the super Wilson loop is obtained starting from an effective string representation of a Wilson Loop. The action obtained in this manner is invariant under a worldline supersymmetry and has a boundary term which contains the spin-string interaction. For rectangular loops the spin-string interaction vanishes and there is no spin-spin term in the resulting heavy quark potential. On the other hand if an allowance is made for the finite intrinsic thickness of the flux tube by assuming that the spin-string interaction takes place not just at the boundary of the string world sheet but extends to a distance of the order of the intrinsic thickness of the flux tube then we do obtain a spin-spin interaction which falls as the fifth power of the distance. Such a term was previously suggested by Kogut and Parisi in the context of a flux-tube model of confinement.

Vyas, Vikram [Physics Department St. Stephen's College, Delhi University, Delhi (India)

2008-08-15T23:59:59.000Z

44

Property:Water Type | Open Energy Information  

Open Energy Info (EERE)

Type Type Jump to: navigation, search Property Name Water Type Property Type String Pages using the property "Water Type" Showing 25 pages using this property. (previous 25) (next 25) 1 1.5-ft Wave Flume Facility + Freshwater + 10-ft Wave Flume Facility + Freshwater + 11-ft Wave Flume Facility + Freshwater + 2 2-ft Flume Facility + Freshwater + 3 3-ft Wave Flume Facility + Freshwater + 5 5-ft Wave Flume Facility + Freshwater + 6 6-ft Wave Flume Facility + Freshwater + A Alden Large Flume + Freshwater + Alden Small Flume + Freshwater + Alden Tow Tank + Freshwater + Alden Wave Basin + Freshwater + B Breakwater Research Facility + Freshwater + Bucknell Hydraulic Flume + Freshwater + C Carderock 2-ft Variable Pressure Cavitation Water Tunnel + Freshwater +

45

Property:InfographicType | Open Energy Information  

Open Energy Info (EERE)

Jump to: navigation, search Property Name InfographicType Property Type String Description The type of document as a string. This property is used by References and...

46

Light from cosmic strings  

Science Conference Proceedings (OSTI)

The time-dependent metric of a cosmic string leads to an effective interaction between the string and photons--the ''gravitational Aharonov-Bohm'' effect--and causes cosmic strings to emit light. We evaluate the radiation of pairs of photons from cosmic strings and find that the emission from cusps, kinks and kink-kink collisions occurs with a flat spectrum at all frequencies up to the string scale. Further, cusps emit a beam of photons, kinks emit along a curve, and the emission at a kink-kink collision is in all directions. The emission of light from cosmic strings could provide an important new observational signature of cosmic strings that is within reach of current experiments for a range of string tensions.

Steer, Daniele A.; Vachaspati, Tanmay [APC 10 rue Alice Domon et Leonie Duquet, 75205 Paris Cedex 13 (France); Physics Department, Arizona State University, Tempe, Arizona 85287 (United States)

2011-02-15T23:59:59.000Z

47

Drill string enclosure  

DOE Patents (OSTI)

The drill string enclosure consists of six component parts, including; a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts. The upper acrylic cylinder is optional based upon the drill string length. The drill string enclosure allows for an efficient drill and sight operation at a hazardous waste site.

Jorgensen, Douglas K. (Idaho Falls, ID); Kuhns, Douglass J. (Idaho Falls, ID); Wiersholm, Otto (Idaho Falls, ID); Miller, Timothy A. (Idaho Falls, ID)

1993-01-01T23:59:59.000Z

48

Drill string enclosure  

DOE Patents (OSTI)

The drill string enclosure consists of six component parts, including; a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts. The upper acrylic cylinder is optional based upon the drill string length. The drill string enclosure allows for an efficient drill and sight operation at a hazardous waste site.

Jorgensen, D.K.; Kuhns, D.J.; Wiersholm, O.; Miller, T.A.

1993-03-02T23:59:59.000Z

49

Property:Geothermal/Type | Open Energy Information  

Open Energy Info (EERE)

Type Type Jump to: navigation, search This is a property of type String. Pages using the property "Geothermal/Type" Showing 25 pages using this property. (previous 25) (next 25) 4 4 UR Guest Ranch Pool & Spa Low Temperature Geothermal Facility + Pool and Spa + A Ace Development Aquaculture Low Temperature Geothermal Facility + Aquaculture + Agua Calientes Trailer Park Space Heating Low Temperature Geothermal Facility + Space Heating + Alive Polarity's Murrietta Hot Spring Pool & Spa Low Temperature Geothermal Facility + Pool and Spa + Americulture Aquaculture Low Temperature Geothermal Facility + Aquaculture + Aq Dryers Agricultural Drying Low Temperature Geothermal Facility + Agricultural Drying + Aqua Caliente County Park Pool & Spa Low Temperature Geothermal Facility + Pool and Spa +

50

Property:NrelPartnerType | Open Energy Information  

Open Energy Info (EERE)

NrelPartnerType NrelPartnerType Jump to: navigation, search Property Name NrelPartnerType Property Type String Description Partnership Type. Pages using the property "NrelPartnerType" Showing 25 pages using this property. (previous 25) (next 25) 1 1366 Technologies + Incubator + 3 3M + CRADA + A A.O. Smith + Test & Evaluation Partner + A123Systems + CRADA + AAON + Test & Evaluation Partner + AQUA Products + Test & Evaluation Partner + AVL Powertrain Engineering + Licensing Agreement + AWS Truewind + Test & Evaluation Partner + Abengoa Solar + CRADA + Abound Solar + Other Relationship + Advanced Energy Products + Test & Evaluation Partner + Affiliated International Management (AIM) + Test & Evaluation Partner + Affordable Comfort + Test & Evaluation Partner +

51

Open-Closed String Correspondence in Open String Field Theory  

E-Print Network (OSTI)

We address the problem of describing different closed string backgrounds in background independent open string field theory: A shift in the closed string background corresponds to a collective excitation of open strings. As an illustration we apply the formalism to the case where the closed string background is a group manifold.

Baumgartl, Marco

2008-01-01T23:59:59.000Z

52

Handbook on string decay  

E-Print Network (OSTI)

We explain simple semi-classical rules to estimate the lifetime of any given highly-excited quantum state of the string spectrum in flat spacetime. We discuss both the decays by splitting into two massive states and by massless emission. As an application, we study a solution describing a rotating and pulsating ellipse which becomes folded at an instant of time -- the ``squashing ellipse''. This string interpolates between the folded string with maximum angular momentum and the pulsating circular string. We explicitly compute the quantum decay rate for the corresponding quantum state, and verify the basic rules that we propose. Finally, we give a more general (4-parameter) family of closed string solutions representing rotating and pulsating elliptical strings.

Roberto Iengo; Jorge G. Russo

2006-01-11T23:59:59.000Z

53

Quantum bit string sealing  

E-Print Network (OSTI)

Though it was proven that secure quantum sealing of a single classical bit is impossible in principle, here we propose an unconditionally secure quantum sealing protocol which seals a classical bit string. Any reader can obtain each bit of the sealed string with an arbitrarily small error rate, while reading the string is detectable. The protocol is simple and easy to be implemented. The possibility of using this protocol to seal a single bit in practical is also discussed.

Guang-Ping He

2005-02-15T23:59:59.000Z

54

Drill string enclosure  

DOE Patents (OSTI)

This invention is comprised of a drill string enclosure which consists of six component parts, including; a top bracket, an upper acrylic cylinder, an acrylic drill casing guide, a lower acrylic cylinder, a bottom bracket, and three flexible ducts. The upper acrylic cylinder is optional based upon the drill string length. The drill string enclosure allows for an efficient drill and sight operation at a hazardous waste site.

Jorgensen, D.K.; Kuhns, D.J.; Wiersholm, O.; Miller, T.A.

1992-12-31T23:59:59.000Z

55

String surfaces, string indices and genera of links  

E-Print Network (OSTI)

We show that every link can be presented as a boundary of a flat string surface. We define the string index and the flat string indexes of a link. Then we provide some upperbounds for these string indexes by using braid representatives and canonical Seifert surface. We study the relation between these string indexes and the genera of links. For applications, we calculate the string index of pretzel links.

Kim, Dongseok; Lee, Jaeun

2011-01-01T23:59:59.000Z

56

Rayleigh's Stretched String  

E-Print Network (OSTI)

We obtain rigorous a priori upper and lower bounds to the exact period of the celebrated Rayleigh stretched string differential equation.

Villarino, Mark B

2008-01-01T23:59:59.000Z

57

Preparation of Internationalized Strings ("stringprep")  

Science Conference Proceedings (OSTI)

This document describes a framework for preparing Unicode text strings in order to increase the likelihood that string input and string comparison work in ways that make sense for typical users throughout the world. The stringprep protocol is useful ...

P. Hoffman; M. Blanchet

2002-12-01T23:59:59.000Z

58

String-Corrected Black Holes  

E-Print Network (OSTI)

for black holes and strings, Phys. Rev. D 55, 6189 (1997) [black holes and elementary string states, Mod. Phys. Lett. A= 2 supergravity and Calabi-Yau string back- grounds, Phys.

Hubeny, Veronika

2009-01-01T23:59:59.000Z

59

Covariant Closed String Coherent States  

Science Conference Proceedings (OSTI)

We give the first construction of covariant coherent closed string states, which may be identified with fundamental cosmic strings. We outline the requirements for a string state to describe a cosmic string, and provide an explicit and simple map that relates three different descriptions: classical strings, light cone gauge quantum states, and covariant vertex operators. The resulting coherent state vertex operators have a classical interpretation and are in one-to-one correspondence with arbitrary classical closed string loops.

Hindmarsh, Mark; Skliros, Dimitri [Department of Physics and Astronomy, University of Sussex, Brighton, East Sussex BN1 9QH (United Kingdom)

2011-02-25T23:59:59.000Z

60

Non-perturbative String Theory from Water Waves  

Science Conference Proceedings (OSTI)

We use a combination of a 't Hooft limit and numerical methods to find non-perturbative solutions of exactly solvable string theories, showing that perturbative solutions in different asymptotic regimes are connected by smooth interpolating functions. Our earlier perturbative work showed that a large class of minimal string theories arise as special limits of a Painleve IV hierarchy of string equations that can be derived by a similarity reduction of the dispersive water wave hierarchy of differential equations. The hierarchy of string equations contains new perturbative solutions, some of which were conjectured to be the type IIA and IIB string theories coupled to (4, 4k ? 2) superconformal minimal models of type (A, D). Our present paper shows that these new theories have smooth non-perturbative extensions. We also find evidence for putative new string theories that were not apparent in the perturbative analysis.

Iyer, Ramakrishnan; Johnson, Clifford V.; /Southern California U.; Pennington, Jeffrey S.; /SLAC

2012-06-14T23:59:59.000Z

Note: This page contains sample records for the topic "type string pages" 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

Dark Energy May Probe String Theory  

E-Print Network (OSTI)

The problem of dark energy arises due to its self-gravitating properties. Therefore explaining vacuum energy may become a question for the realm of quantum gravity, that can be addressed within string theory context. In this talk I concentrate on a recent, string-inspired model, that relies on nonlinear physics of short-distance perturbation modes, for explaining dark energy without any fine-tuning. Dark energy can be observationally probed by its equation of state, w. Different models predict different types of equations of state and string-inspired ones have a time dependent w(z) as their unique signature. Exploring the link between dark energy and string theory may provide indirect evidence for the latter, by means of precision cosmology data.

L. Mersini; M. Bastero-Gil

2002-12-13T23:59:59.000Z

62

Crystalline beams: The string  

SciTech Connect

The authors study the possibility of storing a string of charged particles in a magnetic ring. They define the equilibrium configuration, and examine the confinement conditions. Subsequent, they derive the transfer matrix for motion through a drift, a quadrupole, and a dipole. They finally study the stability of the string as the space-charge force is increased.

Haffmans, A.F.; Maletic, D.; Ruggiero, A.G.

1994-04-30T23:59:59.000Z

63

Stable Charged Cosmic Strings  

Science Conference Proceedings (OSTI)

We study the quantum stabilization of a cosmic string by a heavy fermion doublet in a reduced version of the standard model. We show that charged strings, obtained by populating fermionic bound state levels, become stable if the electroweak bosons are coupled to a fermion that is less than twice as heavy as the top quark. This result suggests that extraordinarily large fermion masses or unrealistic couplings are not required to bind a cosmic string in the standard model. Numerically we find the most favorable string profile to be a simple trough in the Higgs vacuum expectation value of radius {approx_equal}10{sup -18} m. The vacuum remains stable in our model, because neutral strings are not energetically favored.

Weigel, H. [Physics Department, Stellenbosch University, Matieland 7602 (South Africa); Quandt, M. [Institute for Theoretical Physics, Tuebingen University, D-72076 Tuebingen (Germany); Graham, N. [Department of Physics, Middlebury College , Middlebury, Vermont 05753 (United States)

2011-03-11T23:59:59.000Z

64

Closed String Cohomology in Open String Field Theory  

E-Print Network (OSTI)

We show that closed string states in bosonic string field theory are encoded in the cyclic cohomology of cubic open string field theory (OSFT) which, in turn, classifies the deformations of OSFT. This cohomology is then shown to be independent of the open string background. Exact elements correspond to closed string gauge transformations, generic boundary deformations of Witten's 3-vertex and infinitesimal shifts of the open string background. Finally it is argued that the closed string cohomology and the cyclic cohomology of OSFT are isomorphic to each other.

Moeller, Nicolas

2010-01-01T23:59:59.000Z

65

QCD String as Vortex String in Seiberg-Dual Theory  

E-Print Network (OSTI)

We construct a classical vortex string solution in a Seiberg-dual theory of N=1 supersymmetric SO(N_c) QCD which flows to a confining phase. We claim that this vortex string is a QCD string, as previouly argued by M.Strassler. In SO(N_c) QCD, it is known that stable QCD strings exist even in the presence of dynamical quarks. We show that our vortex strings are stable in the Seiberg-dual theory.

Eto, Minoru; Terashima, Seiji

2007-01-01T23:59:59.000Z

66

Reheating and Cosmic String Production  

E-Print Network (OSTI)

We compute the string production rate at the end of inflation, using the string spectrum obtained in \\lss in a near-de Sitter space. Our result shows that highly excited strings are hardly produced, thus the simple slow-roll inflation alone does not offer a cosmic string production mechanism.

Chao-Jun Feng; Xian Gao; Miao Li; Wei Song; Yushu Song

2007-07-06T23:59:59.000Z

67

Property:DIA/Type | Open Energy Information  

Open Energy Info (EERE)

DIA/Type DIA/Type Jump to: navigation, search Property Name DIA/Types Property Type String Description Development Impacts Assessment Toolkit property to help filter pages Used in Form/Template Tool Allows Values Case Studies;Online Tools;Reports;Spreadsheet;Software;Guidebook/Manual Subproperties This property has the following 1 subproperty: E Energy Forecasting Framework and Emissions Consensus Tool (EFFECT) Pages using the property "DIA/Type" Showing 15 pages using this property. A Alternative Fuel and Advanced Technology Vehicles Pilot Program Emissions Benefit Tool + Online Tools + Applied Dynamic Analysis of the Global Economy (ADAGE) Model + Software + C COMMUTER Model + Spreadsheet + E E3MG + Software + Electricity Markets Analysis (EMA) Model + Software +

68

Zipping and Unzipping of Cosmic String Loops in Collision  

E-Print Network (OSTI)

In this paper the collision of two cosmic string loops is studied. After collision junctions are formed and the loops are entangled. We show that after their formation the junctions start to unzip and the loops disentangle. This analysis provides a theoretical understanding of the unzipping effect observed in numerical simulations of a network of cosmic strings with more than one type of cosmic strings. The unzipping phenomena have important effects in the evolution of cosmic string networks when junctions are formed upon collision, such as in a network of cosmic superstrings.

Hassan Firouzjahi; Johanna Karouby; Shahram Khosravi; Robert Brandenberger

2009-07-28T23:59:59.000Z

69

A disintegrating cosmic string  

E-Print Network (OSTI)

We present a simple sandwich gravitational wave of the Robinson-Trautman family. This is interpreted as representing a shock wave with a spherical wavefront which propagates into a Minkowski background minus a wedge. (i.e. the background contains a cosmic string.) The deficit angle (the tension) of the string decreases through the gravitational wave, which then ceases. This leaves an expanding spherical region of Minkowski space behind it. The decay of the cosmic string over a finite interval of retarded time may be considered to generate the gravitational wave.

J. B. Griffiths; P. Docherty

2002-04-29T23:59:59.000Z

70

Black String Flow  

E-Print Network (OSTI)

We give an exact description of the steady flow of a black string into a planar horizon. The event horizon is out of equilibrium and provides a simple, exact instance of a `flowing black funnel' in any dimension D>=5. It is also an approximation to a smooth intersection between a black string and a black hole, in the limit in which the black hole is much larger than the black string thickness. The construction extends easily to more general flows, in particular charged flows.

Emparan, Roberto

2013-01-01T23:59:59.000Z

71

PAGE OF PAGES  

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

bONTRACT AWARD bONTRACT AWARD ! PAGE OF PAGES 1 1. CONTACT NUMBER 2. EFfECT1VE DATE 3. SOUCiTATION NUMBER DE-EMOO01819 I 01/1312012 DE·SOL·OOO2446 *. ISSUED BY ClDE ,,0:.:3:.:0"'0"-1 _ _ _ _ _ - l *. AOUIN!STEREDBY /11_"'. EMCBC - ~~ U.S. Department of Energy U.S. Oepartment of Energy Carlsbad Field Office EM Consolidated Business Cent r 4021 National Parks Highway 250 E. 5th Street, Suite 500 P.O. Box 3090 Cincinnati, OH 45202 Carlsbad, NM 88221 7. NAMEANDAODRESS OF CdOE 8. PAYMeNrV4L BE MADE BY CONTRACTOR ; ' - - - - - - - - - i CAST Specially Transportation, Inc. U.S. Department of Energy Altn: Richard E s h e ' Oak Ridge OperaUons Office 9850 Havana Street Oak Ridge Financial Services Center Henderson, CO 80640·8443 P.O. Box 4307 OA. DUNS NUMIIER 138577528

72

String Phenomenology at the LHC  

E-Print Network (OSTI)

We consider extensions of the standard model based on open strings ending on D-branes, with gauge bosons due to strings attached to stacks of D-branes and chiral matter due to strings stretching between intersecting D-branes. Assuming that the fundamental string mass scale is in the TeV range and the theory is weakly coupled, we review possible signals of string physics at the Large Hadron Collider.

Luis A. Anchordoqui; Haim Goldberg; Dieter Lust; Stephan Stieberger; Tomasz R. Taylor

2009-09-11T23:59:59.000Z

73

Supercritical N = 2 string theory  

E-Print Network (OSTI)

The N=2 string is examined in dimensions above the critical dimension (D=4) in a linear dilaton background. We demonstrate that string states in this background propagate in a single physical time dimension, as opposed to two such dimensions present when the dilaton gradient vanishes in D=4. We also find exact solutions describing dynamical dimensional reduction and transitions from N=2 string theory to bosonic string theory via closed-string tachyon condensation.

Hellerman, Simeon

2007-01-01T23:59:59.000Z

74

Property:CBECSBuildingTypeName | Open Energy Information  

Open Energy Info (EERE)

Property Property Edit with form History Facebook icon Twitter icon » Property:CBECSBuildingTypeName Jump to: navigation, search This is a property of type String. The allowed values for this property are: Education Food Sales Food Service Health Care (Inpatient) Health Care (Outpatient) Lodging Mercantile (Retail Other Than Mall) Mercantile (Enclosed and Strip Malls) Office Public Assembly Public Order and Safety Religious Worship Service Warehouse and Storage Other Vacant Pages using the property "CBECSBuildingTypeName" Showing 16 pages using this property. E Education + Education + F Food Sales + Food Sales + Food Service + Food Service + H Health Care (Inpatient) + Health Care (Inpatient) + Health Care (Outpatient) + Health Care (Outpatient) + L Lodging + Lodging +

75

Subsurface drill string  

DOE Patents (OSTI)

A drill string comprises a first drill string member having a male end; and a second drill string member having a female end configured to be joined to the male end of the first drill string member, the male end having a threaded portion including generally square threads, the male end having a non-threaded extension portion coaxial with the threaded portion, and the male end further having a bearing surface, the female end having a female threaded portion having corresponding female threads, the female end having a non-threaded extension portion coaxial with the female threaded portion, and the female end having a bearing surface. Installation methods, including methods of installing instrumented probes are also provided.

Casper, William L. (Rigby, ID); Clark, Don T. (Idaho Falls, ID); Grover, Blair K. (Idaho Falls, ID); Mathewson, Rodney O. (Idaho Falls, ID); Seymour, Craig A. (Idaho Falls, ID)

2008-10-07T23:59:59.000Z

76

Compressed String Dictionaries  

E-Print Network (OSTI)

The problem of storing a set of strings --- a string dictionary --- in compact form appears naturally in many cases. While classically it has represented a small part of the whole data to be processed (e.g., for Natural Language processing or for indexing text collections), more recent applications in Web engines, Web mining, RDF graphs, Internet routing, Bioinformatics, and many others, make use of very large string dictionaries, whose size is a significant fraction of the whole data. Thus novel approaches to compress them efficiently are necessary. In this paper we experimentally compare time and space performance of some existing alternatives, as well as new ones we propose. We show that space reductions of up to 20% of the original size of the strings is possible while supporting fast dictionary searches.

Brisaboa, Nieves R; Martínez-Prieto, Miguel A; Navarro, Gonzalo

2011-01-01T23:59:59.000Z

77

Hydroball string sensing system  

DOE Patents (OSTI)

A hydroball string sensing system for a nuclear reactor that includes stainless tubes positioned to guide hydroball strings into and out of the nuclear reactor core. A sensor such as an ultrasonic transducer transmitter and receiver is positioned outside of the nuclear reactor core and adjacent to the tube. The presence of an object such a bullet member positioned at an end a hydroball string, or any one of the hydroballs interrupts the transmission of ultrasound from the transmitter to the receiver. Alternatively, if the bullet member and hydroballs include a ferritic material, either a Hall effect sensor or other magnetic field sensors such as a magnetic field rate of change sensor can be used to detect the location and position of a hydroball string. Placing two sensors along the tube with a known distance between the sensors enables the velocity of a hydroball string to be determined. This determined velocity can be used to control the flow rate of a fluid within the tube so as to control the velocity of the hydroball string.

Hurwitz, Michael J. (Pittsburgh, PA); Ekeroth, Douglas E. (Delmont, PA); Squarer, David (Pittsburgh, PA)

1991-01-01T23:59:59.000Z

78

On Climbing Scalars in String Theory  

E-Print Network (OSTI)

In string models with "brane supersymmetry breaking" exponential potentials emerge at (closed-string) tree level but are not accompanied by tachyons. Potentials of this type have long been a source of embarrassment in flat space, but can have interesting implications for Cosmology. For instance, in ten dimensions the logarithmic slope |V'/V| lies precisely at a "critical" value where the Lucchin--Matarrese attractor disappears while the scalar field is \\emph{forced} to climb up the potential when it emerges from the Big Bang. This type of behavior is in principle perturbative in the string coupling, persists after compactification, could have trapped scalar fields inside potential wells as a result of the cosmological evolution and could have also injected the inflationary phase of our Universe.

E. Dudas; N. Kitazawa; A. Sagnotti

2010-09-04T23:59:59.000Z

79

cover page  

Science Conference Proceedings (OSTI)

Page 1. SUPPLEMENTAL REPORT Department of Commerce, Annual Budget Proposal, FY 2008 Annual Report on Technology Transfer: ...

2010-07-27T23:59:59.000Z

80

Towards open-closed string duality: Closed Strings as Open String Fields  

E-Print Network (OSTI)

We establish a translation dictionary between open and closed strings, starting from open string field theory. Under this correspondence, (off-shell) level-matched closed string states are represented by star algebra projectors in open string field theory. Particular attention is paid to the zero mode sector, which is indispensable in order to generate closed string states with momentum. As an outcome of our identification, we show that boundary states, which in closed string theory represent D-branes, correspond to the identity string field in the open string side. It is to be remarked that closed string theory D-branes are thus given by an infinite superposition of star algebra projectors.

L. Bonora; N. Bouatta; C. Maccaferri

2006-09-26T23:59:59.000Z

Note: This page contains sample records for the topic "type string pages" 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

Analytic progress in open string field theory  

E-Print Network (OSTI)

Open string field theory provides an action functional for open string fields, and it is thus a manifestly off-shell formulation of open string theory. The solutions to the equation of motion of open string field theory ...

Kiermaier, Michael Stefan

2009-01-01T23:59:59.000Z

82

The string of variable density: Further results  

Science Conference Proceedings (OSTI)

We analyze the problem of calculating the solutions and the spectrum of a string with arbitrary density and fixed ends. We build a perturbative scheme which uses a basis of WKB-type functions and obtain explicit expressions for the eigenvalues and eigenfunctions of the string. Using this approach we show that it is possible to derive the asymptotic (high energy) behavior of the string, obtaining explicit expressions for the first three coefficients (the first two can also be obtained with the WKB method). Finally, using an iterative approach we also obtain analytical expressions for the low energy behavior of the eigenvalues and eigenfunctions of a string with rapidly oscillating density, recovering (in a simpler way) results in the literature. - Highlights: > We devise a perturbative approach to finding the modes of a string with arbitrary density. > We obtain explicitly the first three coefficients of the asymptotic high energy expansion. > We apply our findings to a series of examples, obtaining both analytical and numerical results.

Amore, Paolo, E-mail: paolo.amore@gmail.com

2011-09-15T23:59:59.000Z

83

Lattice QCD and String Theory  

E-Print Network (OSTI)

Bosonic string formation in gauge theories is reviewed with particular attention to the confining flux in lattice QCD and its string theory description. Recent results on the Casimir energy of the ground state and the string excitation spectrum are analyzed in the Dirichlet string limit of large separation between static sources. The closed string-soliton (torelon) with electric flux winding around a compact dimension and the three-string with a Y-junction created by three static sources are also reviewed. It is shown that string spectra from lattice simulations are consistent with universal predictions of the leading operators from the derivative expansion of a Poincare invariant effective string Lagrangian with reparameterization symmetry. Important characterisitics of the confining flux, like stiffness and the related massive breather modes, are coded in operators with higher derivatives and their determination remains a difficult challenge for lattice gauge theory.

Julius Kuti

2005-11-08T23:59:59.000Z

84

Secure quantum string seal exists  

E-Print Network (OSTI)

It was claimed that all quantum string seals are insecure [H. F. Chau, quant-ph/0602099]. However, here it will be shown that for imperfect quantum string seals, the information obtained by the measurement proposed in that reference is trivial. Therefore imperfect quantum string seals can be unconditionally secure.

Guang Ping He

2006-02-18T23:59:59.000Z

85

On the Computational Complexity of Satisfiability Solving for String Theories  

E-Print Network (OSTI)

Satisfiability solvers are increasingly playing a key role in software verification, with particularly effective use in the analysis of security vulnerabilities. String processing is a key part of many software applications, such as browsers and web servers. These applications are susceptible to attacks through malicious data received over network. Automated tools for analyzing the security of such applications, thus need to reason about strings. For efficiency reasons, it is desirable to have a solver that treats strings as first-class types. In this paper, we present some theories of strings that are useful in a software security context and analyze the computational complexity of the presented theories. We use this complexity analysis to motivate a byte-blast approach which employs a Boolean encoding of the string constraints to a corresponding Boolean satisfiability problem. 1

Susmit Jha; Sanjit A. Seshia; Rhishikesh Limaye

2009-01-01T23:59:59.000Z

86

Current balancing for battery strings  

SciTech Connect

A battery plant is described which features magnetic circuit means for balancing the electrical current flow through a pluraliircuitbattery strings which are connected electrically in parallel. The magnetic circuit means is associated with the battery strings such that the conductors carrying the electrical current flow through each of the battery strings pass through the magnetic circuit means in directions which cause the electromagnetic fields of at least one predetermined pair of the conductors to oppose each other. In an alternative embodiment, a low voltage converter is associated with each of the battery strings for balancing the electrical current flow through the battery strings.

Galloway, James H. (New Baltimore, MI)

1985-01-01T23:59:59.000Z

87

Device for balancing parallel strings  

SciTech Connect

A battery plant is described which features magnetic circuit means in association with each of the battery strings in the battery plant for balancing the electrical current flow through the battery strings by equalizing the voltage across each of the battery strings. Each of the magnetic circuit means generally comprises means for sensing the electrical current flow through one of the battery strings, and a saturable reactor having a main winding connected electrically in series with the battery string, a bias winding connected to a source of alternating current and a control winding connected to a variable source of direct current controlled by the sensing means. Each of the battery strings is formed by a plurality of batteries connected electrically in series, and these battery strings are connected electrically in parallel across common bus conductors.

Mashikian, Matthew S. (Storrs, CT)

1985-01-01T23:59:59.000Z

88

Property:CompanyType | Open Energy Information  

Open Energy Info (EERE)

CompanyType CompanyType Jump to: navigation, search Property Name CompanyType Property Type String Description Describes whether the company is for profit or non profit. Allows Values For Profit;For profit;Non Profit;Non profit Subproperties This property has the following 4 subproperties: A Able Energy Co. C Canary Investments Ltd. H Hyperion Green Energy India Pvt. Ltd. P PowerIt Renewable Energy Pvt Ltd Pages using the property "CompanyType" Showing 25 pages using this property. (previous 25) (next 25) 4 4C Offshore Limited + For Profit + A AEE Renewables + For Profit + ALDACOR INC + For Profit + Ads-tec GmbH + For Profit + Advanced Energy Solutions + For Profit + All Solar, Inc. + For Profit + B Buffalo Software + For Profit + C Community Energy Inc + For Profit +

89

Page | Open Energy Information  

Open Energy Info (EERE)

Page Page Jump to: navigation, search Properties of type "Page" Showing 149 properties using this type. A Property:ASHRAE 169 Climate Zone Property:ASHRAE 169 Climate Zone Number Property:ASHRAE 169 Climate Zone Subtype Property:ASHRAE 169 Standard Property:AdditionalBenefitPlaces Property:Affiliated Companies Property:Applicant Property:Availability Property:Awardee Property:AwardeeHeadquarters B Property:BLM CaseType Property:BasedNear Property:BrineConstituents Property:BrophyModel Property:Building/County Property:Buildings/ModelBuildingType Property:Buildings/ModelClimateZone Property:Buildings/Models C Property:CXReference Property:CapRockAge Property:CapRockLithology Property:City Property:Collaborating Organizations Property:Collaborators Property:ControlStructure

90

Mechanical drill string jar  

SciTech Connect

An improved mechanical drill string jar is described that allows uninhibited telescoping movement to the normal drilling condition. The drill string jar consists of: (a) an elongated, generally cylindrical, body usable as a drill string element; (b) axial motion resistance means situated in the annular opening; (c) bias means operatively associated with at least one element of the splined pair to rotate the pair out of alignment when the splined pair is rotationally disengaged; (d) opposed cooperating surfaces on at least two of the spline teeth situated such that forced axial relative motion of the splined pair will produce opposed radial forces on the teeth; (e) means intrinsic to at least one element of the splined pair to permit resisted radial displacement of the spline teeth when forced axial relative motion occurs, to permit one element to move axially through the other; (f) cam surfaces on at least one of the teeth situated to force rotational alignment of the splined pair when telescoping movement is from a jarring condition toward the normal drilling condition; (g) relative rotation resistance means situated in the annular opening, structurally engaged with the pair of telescoping members such that relative rotation therebetween will be resisted; (h) striker and anvil means situated in the annular opening, operatively associated with the telescoping pair of elements, such that axial relative movement therebetween will be solidly stopped at the axial extreme condition; (i) a flow-through fluid channel means extending between the means to attach to the continuing drill string; and (j) seal means situated in the annular opening, operatively associated with the telescoping pair of members, to provide fluid tightness therebetween.

Buck, D.A.

1987-08-25T23:59:59.000Z

91

Quantum String Seal Is Insecure  

E-Print Network (OSTI)

A quantum string seal encodes the value of a (bit) string as a quantum state in such a way that everyone can extract a non-negligible amount of available information on the string by a suitable measurement. Moreover, such measurement must disturb the quantum state and is likely to be detected by an authorized verifier. In this way, the intactness of the encoded quantum state plays the role of a wax seal in the digital world. Here I analyze the security of quantum string seal by studying the information disturbance tradeoff of a measurement. This information disturbance tradeoff analysis extends the earlier results of Bechmann-Pasquinucci et al. and Chau by concluding that all quantum string seals are insecure. Specifically, I find a way to obtain non-trivial available information on the string that escapes the verifier's detection with at least 50% chance.

H. F. Chau

2006-02-13T23:59:59.000Z

92

Cosmic string induced CMB maps  

SciTech Connect

We compute maps of CMB temperature fluctuations seeded by cosmic strings using high resolution simulations of cosmic strings in a Friedmann-Robertson-Walker universe. We create full-sky, 18 deg. and 3 deg. CMB maps, including the relevant string contribution at each resolution from before recombination to today. We extract the angular power spectrum from these maps, demonstrating the importance of recombination effects. We briefly discuss the probability density function of the pixel temperatures, their skewness, and kurtosis.

Landriau, M. [Max-Planck-Institut fuer extraterrestrische Physik, Giessenbachstrasse 1, 85748 Garching (Germany); Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Centre for Mathematical Sciences, Wilberforce Road, Cambridge CB3 0WA (United Kingdom); Shellard, E. P. S. [Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Centre for Mathematical Sciences, Wilberforce Road, Cambridge CB3 0WA (United Kingdom)

2011-02-15T23:59:59.000Z

93

Special Page  

Gasoline and Diesel Fuel Update (EIA)

Since many of you are probably interested in heating fuels for the winter, Since many of you are probably interested in heating fuels for the winter, EIA has also designed specific or special web pages highlighting certain fuels. We find during certain times of the year, users look for certain energy information. For example, last year when heating prices spiked during Jan and Feb, we designed a page to highlight information on propane and heating oil. We also have a gasoline and diesel page because these fuels are important during the driving season. The page has information about stocks, production, imports and prices. We've provided links to various agencies/organizations and sites which may be relevant to getting tracking other information during the heating season such as SPR, LIHEAP, or associations such as API, PMAA, or the

94

Janie Page  

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

Janie Page Janie Page Janie Page Grid Integration Group Demand Response Research Center (DRRC) Lawrence Berkeley National Laboratory 1 Cyclotron Road MS 90R1121 Berkeley CA 94720 Office Location: 90-1141 (510) 486-7015 JPage@lbl.gov Janie Page joined the Demand Response Research Group in 2010 as a Scientific Engineering Associate, specializing in residential and small commercial demand response. Prior to joining the DRRC, she was a Principal Associate at Siemens Energy and Automation, developing their Megacities transportation program. She is co-inventor of two U.S. patents for mathematical models describing biological system behavior in magnetic fields and has over thirty related publications in peer reviewed journals. She holds a bachelor's degree in Mathematics (minor: Astrophysics) and a

95

Home Page  

Gasoline and Diesel Fuel Update (EIA)

Electronic Access and Related Reports The AEO98 will be available on CD-ROM and the EIA Home Page on the Internet (http:www.eia.govoiafaeo98homepage.html), including text,...

96

Physics of String Flux Compactifications  

E-Print Network (OSTI)

We provide a qualitative review of flux compactifications of string theory, focusing on broad physical implications and statistical methods of analysis.

Frederik Denef; Michael R. Douglas; Shamit Kachru

2007-01-06T23:59:59.000Z

97

R-parity from the heterotic string  

E-Print Network (OSTI)

parity from the heterotic string ? arXiv:hep-th/0412079 v1 7weakly interacting heterotic string, T-duality invariant e?SM). The heterotic string is perturbatively invariant [5

Gaillard, Mary K.

2004-01-01T23:59:59.000Z

98

The SSC Full Cell Prototype String Test  

E-Print Network (OSTI)

and power testing of a string of 50 mm aperture dipoleThe SSC Full Cell Prototype String Test A.D. McInturff, P.The SSC Full Cell Prototype String Test P. Kraushaar, W.

McInturff, A.D.

2011-01-01T23:59:59.000Z

99

Categorified Symplectic Geometry and the Classical String  

E-Print Network (OSTI)

and extended objects in string theory. http://arxiv.org/abs/Witten, E. : Anomalies in string theory with D-branes. AsianGeometry and the Classical String 26. Kalb, M. , Ramond,

Baez, John C.; Hoffnung, Alexander E.; Rogers, Christopher L.

2010-01-01T23:59:59.000Z

100

String Field Equations from Generalized Sigma Model  

E-Print Network (OSTI)

I I . i LBNL-39854 String Field Equations fromU C B - P T H - 9 7 / 0 3 String F i e l d Equations fromnew approach for deriving the string field equations from a

Bardakci, K.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "type string pages" 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

String Correction for Baryon Orbital Excitations  

E-Print Network (OSTI)

The correction to the string junction three-quark potential in a baryon due to the proper moment of inertia of the QCD string is calculated. The magnitudes of the string corrections in P-wave heavy baryons are estimated.

Driga, O N; Veselov, A I

2010-01-01T23:59:59.000Z

102

String Scattering Amplitudes in High Energy Limits  

E-Print Network (OSTI)

A very review of string scattering amplitudes in two important high energy limits: hard scattering and Regge scattering. Recent results of the symmetries in string theory by studying high energy string scattering anplitudes are showed.

Yang, Yi

2011-01-01T23:59:59.000Z

103

Seeking String Theory in the Cosmos  

E-Print Network (OSTI)

We review the existence, formation and properties of cosmic strings in string theory, the wide variety of observational techniques that are being employed to detect them, and the constraints that current observations impose on string theory models.

Copeland, Edmund J; Vachaspati, Tanmay

2011-01-01T23:59:59.000Z

104

Kahler stabilized, modular invariant heterotic string models  

E-Print Network (OSTI)

from the heterotic string. II,” [arXiv:hep-th/0606187]. 82.mediated SUSY breaking from a string theory perspective,” [Modular Invariant Heterotic String Models a 168. K. R.

Gaillard, Mary K.

2008-01-01T23:59:59.000Z

105

String field theory and tachyon condensation  

E-Print Network (OSTI)

In this thesis I discuss various aspects of Witten's cubic string field theory. After a brief review of the basics of string field theory we begin by showing how string field theory can be used to check certain conjectures ...

Ellwood, Ian Thomas, 1977-

2004-01-01T23:59:59.000Z

106

Property:Incentive/PolicyType | Open Energy Information  

Open Energy Info (EERE)

PolicyType PolicyType Jump to: navigation, search Property Name Incentive/Policy Type Property Type String Description Policy Type for EZ Feed policy types. Used in place of putting it into Category Financial Incentive Programs or Rules Regulations Policies Incentive Programs Pages using the property "Incentive/PolicyType" Showing 25 pages using this property. (previous 25) (next 25) 4 401 Certification (Vermont) + Other Policy + A Abatement of Air Pollution: Air Pollution Control Equipment and Monitoring Equipment Operation (Connecticut) + Other Policy + Abatement of Air Pollution: Connecticut Primary and Secondary Standards (Connecticut) + Other Policy + Abatement of Air Pollution: Control of Carbon Dioxide Emissions/Carbon Dioxide Budget Trading Program (Connecticut) + Other Policy +

107

The Particle Adventure | Unsolved Mysteries | String theory  

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

String theory String theory Modern physics has good theories for quantum mechanics, relativity, and gravity. But these theories do not quite work with each other. There are...

108

String deformations induced by retardation effects  

E-Print Network (OSTI)

The rotating string model is an effective model of mesons, in which the quark and the antiquark are linked by a straight string. We previously developed a new framework to include the retardation effects in the rotating string model, but the string was still kept straight. We now go a step further and show that the retardation effects cause a small deviation of the string from the straight line. We first give general arguments constraining the string shape. Then, we find analytical and numerical solutions for the string deformation induced by retardation effects. We finally discuss the influence of the curved string on the energy spectrum of the model.

F. Buisseret; V. Mathieu; C. Semay

2006-05-30T23:59:59.000Z

109

Drill string gas data  

DOE Green Energy (OSTI)

Data and supporting documentation were compiled and analyzed for 26 cases of gas grab samples taken during waste-tank core sampling activities between September 1, 1995 and December 31, 1997. These cases were tested against specific criteria to reduce uncertainties associated with in-tank sampling location and conditions. Of the 26 possible cases, 16 qualified as drill-string grab samples most likely to represent recently released waste gases. The data from these 16 ``confirmed`` cases were adjusted to remove non-waste gas contributions from core-sampling activities (argon or nitrogen purge), the atmospheric background, and laboratory sampler preparation (helium). The procedure for subtracting atmospheric, laboratory, and argon purge gases was unambiguous. No reliable method for determining the exact amount of nitrogen purge gas was established. Thus, the final set of ``Adjusted`` drill string gas data for the 6 nitrogen-purged cases had a greater degree of uncertainty than the final results for the 10 argon-purged cases. Including the appropriate amounts of uncertainty, this final set of data was added to the set of high-quality results from the Retained Gas Sampler (RGS), and good agreement was found for the N{sub 2}, H{sub 2}, and N{sub 2}O mole fractions sampled from common tanks. These results indicate that under favorable sampling conditions, Drill-String (DS) grab samples can provide reasonably accurate information about the dominant species of released gas. One conclusion from this set of total gas data is that the distribution of the H{sub 2} mole fractions is bimodal in shape, with an upper bound of 78%.

Siciliano, E.R.

1998-05-12T23:59:59.000Z

110

Forecast constraints on cosmic string parameters from gravitational wave direct detection experiments  

E-Print Network (OSTI)

Gravitational waves (GWs) are one of the key signatures of cosmic strings. If GWs from cosmic strings are detected in future experiments, not only their existence can be confirmed but also their properties might be probed. In this paper, we study the determination of cosmic string parameters through direct detection of GW signatures in future ground-based GW experiments. We consider two types of GWs, bursts and the stochastic GW background, which provide us with different information about cosmic string properties. Performing the Fisher matrix calculation on the cosmic string parameters, such as parameters governing the string tension $G\\mu$ and initial loop size $\\alpha$ and the reconnection probability $p$, we find that the two different types of GW can break degeneracies in some of these parameters and provide better constraints than those from each measurement.

Sachiko Kuroyanagi; Koichi Miyamoto; Toyokazu Sekiguchi; Keitaro Takahashi; Joseph Silk

2012-02-14T23:59:59.000Z

111

Wilson loops in string duals of walking and flavored systems  

Science Conference Proceedings (OSTI)

We consider the vacuum expectation value of Wilson loop operators by studying the behavior of string probes in solutions of type-IIB string theory generated by N{sub c} D5-branes wrapped on an S{sup 2} internal manifold. In particular, we focus on solutions to the background equations that are dual to field theories with a walking gauge coupling as well as for flavored systems. We present in detail our walking solution and emphasize various general aspects of the procedure to study Wilson loops using string duals. We discuss the special features that the strings show when probing the region associated with the walking of the field-theory coupling.

Nunez, Carlos; Piai, Maurizio; Rago, Antonio [Swansea University, School of Physical Sciences, Singleton Park, Swansea, Wales (United Kingdom)

2010-04-15T23:59:59.000Z

112

Electric drill-string telemetry  

Science Conference Proceedings (OSTI)

We design a numerical algorithm for simulation of low-frequency electric-signal transmission through a drill string. This is represented by a transmission line with varying geometrical and electromagnetic properties versus depth, depending on the characteristics ... Keywords: drill string, low frequency, simulation, transmission line, voltage

José M. Carcione; Flavio Poletto

2003-04-01T23:59:59.000Z

113

Subcritical string and large N QCD  

Science Conference Proceedings (OSTI)

We pursue the possibility of using subcritical string theory in 4 spacetime dimensions to establish a string dual for large N QCD. In particular we study the even G-parity sector of the 4 dimensional Neveu-Schwarz dual resonance model as the natural candidate for this string theory. Our point of view is that the open string dynamics given by this model will determine the appropriate subcritical closed string theory, a tree level background of which should describe the sum of planar multiloop open string diagrams. We examine the one-loop open string diagram, which contains information about the closed string spectrum at weak coupling. Higher loop open string diagrams will be needed to determine closed string interactions. We also analyze the field theory limit of the one-loop open string diagram and recover the correct running coupling behavior of the limiting gauge theory.

Thorn, Charles B. [Institute for Fundamental Theory, Department of Physics, University of Florida, Gainesville Florida 32611 (United States)

2008-10-15T23:59:59.000Z

114

Subcritical String and Large N QCD  

E-Print Network (OSTI)

We pursue the possibility of using subcritical string theory in 4 space-time dimensions to establish a string dual for large N QCD. In particular we study the even G-parity sector of the 4 dimensional Neveu-Schwarz dual resonance model as the natural candidate for this string theory. Our point of view is that the open string dynamics given by this model will {\\it determine} the appropriate subcritical closed string theory, a tree level background of which should describe the sum of planar multi-loop open string diagrams. We examine the one loop open string diagram, which contains information about the closed string spectrum at weak coupling. Higher loop open string diagrams will be needed to determine closed string interactions. We also analyze the field theory limit of the one loop open string diagram and recover the correct running coupling behavior of the limiting gauge theory.

Thorn, Charles B

2008-01-01T23:59:59.000Z

115

Property:EnergyServicesType | Open Energy Information  

Open Energy Info (EERE)

EnergyServicesType EnergyServicesType Jump to: navigation, search Property Name EnergyServicesType Property Type String Description Type of energy services provided. Allows Values Lighting;Cooking and water heating;Space heating;Cooling;Information and communications;Earning a living Pages using the property "EnergyServicesType" Showing 8 pages using this property. B Benin: Increased Access to Modern Energy Project + Lighting +, Cooking and water heating +, Space heating +, ... E Ethiopia Energy Access Project + Lighting +, Cooking and water heating +, Information and communications + G Ghana Energy Development and Access Project (GEDAP) + Lighting +, Cooking and water heating +, Information and communications + M Mongolia Renewable Energy and Rural Electricity Access Project + Lighting +, Cooking and water heating +, Space heating +, ...

116

Emergence String and Mass Formulas of Hadrons  

E-Print Network (OSTI)

Assume that hadrons are formed from the emergence string. Usual string should possess two moving states: oscillation and rotation, so we propose corresponding potential and the equation of the emergence string, whose energy spectrum is namely the GMO mass formula and its modified accurate mass formula. These are some relations between the string and observable experimental data.

Yi-Fang Chang

2011-07-19T23:59:59.000Z

117

Shortest synchronizing strings for Huffman codes  

Science Conference Proceedings (OSTI)

Most complete binary prefix codes have a synchronizing string, that is a string that resynchronizes the decoder regardless of its previous state. This work presents an upper bound on the length of the shortest synchronizing string for such codes. Two ... Keywords: ?erný conjecture, Finite automaton, Huffman code, Synchronizing string

Marek Tomasz Biskup; Wojciech Plandowski

2009-09-01T23:59:59.000Z

118

Web Page Error 404.1 Page Cannot be Found  

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

are looking for cannot be found. The Web site you are looking for is unavailable due to its identification configuration settings. Please try the following: If you typed the page...

119

Topological Insulators and Superconductors from String Theory  

E-Print Network (OSTI)

Topological insulators and superconductors in different spatial dimensions and with different discrete symmetries have been fully classified recently, revealing a periodic structure for the pattern of possible types of topological insulators and supercondutors, both in terms of spatial dimensions and in terms of symmetry classes. It was proposed that K-theory is behind the periodicity. On the other hand, D-branes, a solitonic object in string theory, are also known to be classified by K-theory. In this paper, by inspecting low-energy effective field theories realized by two parallel D-branes, we establish a one-to-one correspondence between the K-theory classification of topological insulators/superconductors and D-brane charges. In addition, the string theory realization of topological insulators and superconductors comes naturally with gauge interactions, and the Wess-Zumino term of the D-branes gives rise to a gauge field theory of topological nature, such as ones with the Chern-Simons term or the $\\theta$-term in various dimensions. This sheds light on topological insulators and superconductors beyond non-interacting systems, and the underlying topological field theory description thereof. In particular, our string theory realization includes the honeycomb lattice Kitaev model in two spatial dimensions, and its higher-dimensional extensions. Increasing the number of D-branes naturally leads to a realization of topological insulators and superconductors in terms of holography (AdS/CFT).

Shinsei Ryu; Tadashi Takayanagi

2010-07-24T23:59:59.000Z

120

String Connections and Chern-Simons Theory  

E-Print Network (OSTI)

We present a finite-dimensional and smooth formulation of string structures on spin bundles. It uses trivializations of the Chern-Simons 2-gerbe associated to this bundle. Our formulation is particularly suitable to deal with string connections. We prove that every string structure admits a string connection and that the possible choices form a contractible space. We also provide a new relation between string connections and 3-forms on the base manifold.

Waldorf, Konrad

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "type string pages" 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

work page  

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

Katherine Harkay's APS Home Page Katherine Harkay's APS Home Page Contact information: Katherine C. Harkay Physicist Accelerator Systems Division Advanced Photon Source Argonne National Laboratory Phone: 630-252-9758 Fax: 630-252-4732 E-mail: harkay@aps.anl.gov Argonne National Laboratory, ASD/401 B2166, 9700 S. Cass Avenue, Argonne, IL 60439, U.S.A. Research Interests: Concentration has been in the areas of high-intensity collective effects and machine coupling impedance, with the goal of improving the performance of particle accelerators. Another major research thrust has been the electron cloud effect, a growing concern in high-intensity, high-energy rings. Long-term research interests include: storage-ring FELs, coherent synchrotron radiation and nonlinear effects in beams, and plasma-based

122

Quantization of the Lie Bialgebra of String Topology  

E-Print Network (OSTI)

eld theory interpretation of string topology. Commun. Math.Chas, M. , Sullivan, D. : String topology, http://arXiv.org/M. , Sullivan, D. : Closed string operators in topology

Chen, Xiaojun; Eshmatov, Farkhod; Gan, Wee Liang

2011-01-01T23:59:59.000Z

123

convergence of string-averaging projection schemes for inconsistent ...  

E-Print Network (OSTI)

Aug 4, 2003 ... out proof) an algorithmic scheme which generalizes both the string- ... Projecting along each string is sequential, but the strings are inM.

124

Bosonic String and String Field Theory: a solution using the holomorphic representation  

E-Print Network (OSTI)

In this paper we show that the holomorphic representation is appropriate for description in a consistent way string and string field theories, when the considered number of component fields of the string field is finite. A new Lagrangian for the closed string is obtained and shown to be equivalent to Nambu-Goto's Lagrangian. We give the notion of anti-string, evaluate the propagator for the string field, and calculate the convolution of two of them.

Bollini, C G

2009-01-01T23:59:59.000Z

125

Property:Buildings/ModelType | Open Energy Information  

Open Energy Info (EERE)

ModelType ModelType Jump to: navigation, search This is a property of type String. The allowed values for this property are: Baseline Minimum Cost Max Tech PV Takeoff Cost Neutral 30% Energy Savings 50% Energy Savings 70% Energy Savings Other Pages using the property "Buildings/ModelType" Showing 12 pages using this property. G General Merchandise 2009 TSD Chicago High Plug Load 50% Energy Savings + 50% Energy Savings + General Merchandise 2009 TSD Chicago High Plug Load Baseline + Baseline + General Merchandise 2009 TSD Chicago Low Plug Load 50% Energy Savings + 50% Energy Savings + General Merchandise 2009 TSD Chicago Low Plug Load Baseline + Baseline + General Merchandise 2009 TSD Miami High Plug Load 50% Energy Savings + 50% Energy Savings + General Merchandise 2009 TSD Miami High Plug Load Baseline + Baseline +

126

Property:Buildings/ModelTargetType | Open Energy Information  

Open Energy Info (EERE)

ModelTargetType ModelTargetType Jump to: navigation, search This is a property of type String. The allowed values for this property are: ASHRAE 90.1 2007 ASHRAE 90.1 2004 ASHRAE 189.1 LEED Pages using the property "Buildings/ModelTargetType" Showing 12 pages using this property. G General Merchandise 2009 TSD Chicago High Plug Load 50% Energy Savings + ASHRAE 90.1 2004 + General Merchandise 2009 TSD Chicago High Plug Load Baseline + ASHRAE 90.1 2004 + General Merchandise 2009 TSD Chicago Low Plug Load 50% Energy Savings + ASHRAE 90.1 2004 + General Merchandise 2009 TSD Chicago Low Plug Load Baseline + ASHRAE 90.1 2004 + General Merchandise 2009 TSD Miami High Plug Load 50% Energy Savings + ASHRAE 90.1 2004 + General Merchandise 2009 TSD Miami High Plug Load Baseline + ASHRAE 90.1 2004 +

127

An Exact Bosonization Rule for c=1 Noncritical String Theory  

E-Print Network (OSTI)

We construct a string field theory for c=1 noncritical strings using the loop variables as the string field. We show how one can express the nonrelativistic free fermions which describes the theory, in terms of these string fields.

Ishibashi, N

2007-01-01T23:59:59.000Z

128

Property:Foaf/Page | Open Energy Information  

Open Energy Info (EERE)

Page Page Jump to: navigation, search Property Name Foaf/Page Property Type URL Description Link to an external page discussing the same topic. (URL) It is equivalent to the well-known foaf:page property. Pages using the property "Foaf/Page" Showing 25 pages using this property. (previous 25) (next 25) 1 10 CFR § 1021 + http://en.openei.org/wiki/File:10CFRPart1021.pdf + 2 2-D Magnetotellurics At The Geothermal Site At Soultz-Sous-Forets- Resistivity Distribution To About 3000 M Depth + http://www.sciencedirect.com/science/article/pii/S1631071310001070 + 2.8-Ma Ash-Flow Caldera At Chegem River In The Northern Caucasus Mountains (Russia), Contemporaneous Granites, And Associated Ore Deposits + http://www.sciencedirect.com/science/article/B6VCS-48B5BV5-KK/2/a841cce0d247b754e5163bb62f72dc05 +

129

page 10  

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

LAB NEWS LAB NEWS * December 15, 2000 * Page 10 Sandia stimulates statewide wind power development Purchase of wind-generated electricity for WIPP is just the start of a wind industry in state Sandia is purchasing "green" elec- tricity generated by an already-in-place wind turbine near Clovis, N.M., to stim- ulate development of wind resources essentially untapped in New Mexico. The ecologically desirable power source is expected to provide electricity for approximately six percent of the DOE's Waste Isolation Pilot Plant (WIPP) total electric services requirement. Sandia scientists hope this purchase, along with others over a 10-year period, will stimulate the growth of a New Mex- ico wind power industry, says Henry Dodd, Manager of Wind Energy Tech- nology Dept 6214.

130

Acoustic data transmission through a drill string  

DOE Patents (OSTI)

Acoustical signals are transmitted through a drill string by canceling upward moving acoustical noise and by preconditioning the data in recognition of the comb filter impedance characteristics of the drill string. 5 figs.

Drumheller, D.S.

1988-04-21T23:59:59.000Z

131

String spectra near some null cosmological singularities  

Science Conference Proceedings (OSTI)

We construct cosmological spacetimes with null Kasner-like singularities as purely gravitational solutions with no other background fields turned on. These can be recast as anisotropic plane-wave spacetimes by coordinate transformations. We analyze string quantization to find the spectrum of string modes in these backgrounds. The classical string modes can be solved for exactly in these time-dependent backgrounds, which enables a detailed study of the near-singularity string spectrum, (time-dependent) oscillator masses, and wave functions. We find that for low-lying string modes (finite oscillation number), the classical near-singularity string mode functions are nondivergent for various families of singularities. Furthermore, for any infinitesimal regularization of the vicinity of the singularity, we find a tower of string modes of ultrahigh oscillation number which propagate essentially freely in the background. The resulting picture suggests that string interactions are non-negligible near the singularity.

Madhu, Kallingalthodi [Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005 (India); Narayan, K. [Chennai Mathematical Institute, SIPCOT IT Park, Padur PO, Siruseri 603103 (India)

2009-06-15T23:59:59.000Z

132

Emerging Neurophysiological Specialization for Letter Strings  

Science Conference Proceedings (OSTI)

In adult readers, printed words and other letter strings activate specialized visual functions within 200 msec, as evident from neurophysiological recordings of brain activity. These fast, specialized responses to letter strings are thought to develop ...

Urs Maurer; Silvia Brem; Kerstin Bucher; Daniel Brandeis

2005-10-01T23:59:59.000Z

133

A Bijective String Sorting Transform  

E-Print Network (OSTI)

Given a string of characters, the Burrows-Wheeler Transform rearranges the characters in it so as to produce another string of the same length which is more amenable to compression techniques such as move to front, run-length encoding, and entropy encoders. We present a variant of the transform which gives rise to similar or better compression value, but, unlike the original, the transform we present is bijective, in that the inverse transformation exists for all strings. Our experiments indicate that using our variant of the transform gives rise to better compression ratio than the original Burrows-Wheeler transform. We also show that both the transform and its inverse can be computed in linear time and consuming linear storage.

Gil, Joseph Yossi

2012-01-01T23:59:59.000Z

134

Deformations of topological open strings  

E-Print Network (OSTI)

Deformations of topological open string theories are described, with an emphasis on their algebraic structure. They are encoded in the mixed bulk-boundary correlators. They constitute the Hochschild complex of the open string algebra – the complex of multilinear maps on the boundary Hilbert space. This complex is known to have the structure of a Gerstenhaber algebra (Deligne theorem), which is also found in closed string theory. Generalising the case of function algebras with a B-field, we identify the algebraic operations of the bulk sector, in terms of the mixed correlators. This gives a physical realisation of the Deligne theorem. We translate to the language of certain operads (spaces of d-discs with gluing) and d-algebras, and comment on generalisations, notably to the AdS/CFT correspondence. The formalism is applied to the topological A-and B-models on the disc

Christiaan Hofman; Whee Ky Ma

2000-01-01T23:59:59.000Z

135

A solution manual for Polchinski's "String Theory"  

E-Print Network (OSTI)

We present detailed solutions to 81 of the 202 problems in J. Polchinski's two-volume textbook "String Theory".

Headrick, Matthew

2008-01-01T23:59:59.000Z

136

Disseminating the Kilogram, No Strings Attached  

Science Conference Proceedings (OSTI)

Disseminating the Kilogram, No Strings Attached. August 24, 2012. ... The impending redefinition of the kilogram presents a weighty dilemma. ...

2013-01-03T23:59:59.000Z

137

A solution manual for Polchinski's "String Theory"  

E-Print Network (OSTI)

We present detailed solutions to 81 of the 202 problems in J. Polchinski's two-volume textbook "String Theory".

Matthew Headrick

2008-12-23T23:59:59.000Z

138

Inside PageRank  

Science Conference Proceedings (OSTI)

Although the interest of a Web page is strictly related to its content and to the subjective readers' cultural background, a measure of the page authority can be provided that only depends on the topological structure of the Web. PageRank is a noticeable ... Keywords: Information retrieval, Markov chains, PageRank, Web page scoring, search engines, searching the Web

Monica Bianchini; Marco Gori; Franco Scarselli

2005-02-01T23:59:59.000Z

139

String Corrections To The Riemann Curvature Tensor  

E-Print Network (OSTI)

The string corrections to the Riemann Curvature tensor are found to first order in the string slope parameter, here proportional to $\\g$. This is done for D=10 supergravity, the presumed low energy limit of string theory. We follow the perturbative approach. We also simplify a crucial result in our previous solution.

Bellucci, S

2011-01-01T23:59:59.000Z

140

Transverse structure of the QCD string  

Science Conference Proceedings (OSTI)

The characterization of the transverse structure of the QCD string is discussed. We formulate a conjecture as to how the stress-energy tensor of the underlying gauge theory couples to the string degrees of freedom. A consequence of the conjecture is that the energy density and the longitudinal-stress operators measure the distribution of the transverse position of the string, to leading order in the string fluctuations, whereas the transverse-stress operator does not. We interpret recent numerical measurements of the transverse size of the confining string and show that the difference of the energy and longitudinal-stress operators is a particularly natural probe at next-to-leading order. Second, we derive the constraints imposed by open-closed string duality on the transverse structure of the string. We show that a total of three independent ''gravitational'' form factors characterize the transverse profile of the closed string, and obtain the interpretation of recent effective string theory calculations: the square radius of a closed string of length {beta} defined from the slope of its gravitational form factor, is given by (d-1/2{pi}{sigma})log({beta}/4r{sub 0}) in d space dimensions. This is to be compared with the well-known result that the width of the open string at midpoint grows as (d-1/2{pi}{sigma})log(r/r{sub 0}). We also obtain predictions for transition form factors among closed-string states.

Meyer, Harvey B. [Johannes Gutenberg Universitaet Mainz, Institut fuer Kernphysik, 55099 Mainz (Germany)

2010-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "type string pages" 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

The Feynman $i \\epsilon$ in String Theory  

E-Print Network (OSTI)

The Feynman $i\\varepsilon$ is an important ingredient in defining perturbative scattering amplitudes in field theory. Here we describe its analog in string theory. Roughly one takes the string worldsheet to have Lorentz signature when a string is going on-shell although it has Euclidean signature generically.

Witten, Edward

2013-01-01T23:59:59.000Z

142

Automatic Verification of String Manipulating ProgramsOverview Outline Overview Symbolic String Verification Composite Verification References  

E-Print Network (OSTI)

Is it Vulnerable? We investigate string verification problem and present an automata-based approach for automatic verification of string manipulating programs based on symbolic string analysis. String analysis plays an important role in the security area. For instance, one can detect various web vulnerabilities like SQL Command Injection and Cross Site Scripting (XSS) attacks. Fang Yu, UCSB Automatic Verification of String Manipulating ProgramsOutline

Fang Yu; Cs Guest Leture

2009-01-01T23:59:59.000Z

143

Geothermal: Home Page  

Office of Scientific and Technical Information (OSTI)

Home Page Home Page Geothermal Technologies Legacy Collection Help/FAQ | Site Map | Contact Us Home/Basic Search About Publications Advanced Search New Hot Docs News Related Links Search for: (Place phrase in "double quotes") Sort By: Relevance Publication Date System Entry Date Document Type Title Research Org Sponsoring Org OSTI Identifier Report Number DOE Contract Number Ascending Descending Search Quickly and easily search geothermal technical and programmatic reports dating from the 1970's to present day. These "legacy" reports are among the most valuable sources of DOE-sponsored information in the field of geothermal energy technology. See "About" for more information. The Geothermal Technologies Legacy Collection is sponsored by the Geothermal Technologies Program, DOE Energy Efficiency and Renewable Energy

144

The String Origin of SUSY Flavor Violation  

E-Print Network (OSTI)

We argue that in large classes of string compactifications with a MSSM-like structure substantial flavor violating SUSY-breaking soft terms are generically induced. We specify to the case of flavor dependent soft-terms in type IIB/F-theory SU(5) unified models, although our results can be easily extended to other settings. The Standard Model (SM) degrees of freedom reside in a local system of 7-branes wrapping a 4-fold S in the extra dimensions. It is known that in the presence of closed string 3-form fluxes SUSY-breaking terms are typically generated. We explore the generation dependence of these soft terms and find that non-universalities arise whenever the flux varies over the 4-fold S. These non-universalities are parametrically suppressed by (M_{GUT}/M_{Pl})^{1/3}. They also arise in the case of varying open string fluxes, in this case parametrically suppressed by \\alpha_{GUT}^{1/2}. For a standard unification scheme with M_{GUT} = 10^{16} GeV and \\alpha_{\\rm GUT} = 1/24 these suppressions are very mild. Although limits from the kaon mass difference \\Delta m_K are easily obeyed for squark masses above the present LHC limits, constraints from the CP-violation parameter \\epsilon_K imply squark masses in the multi-TeV region. The constraints from BR(\\mu \\rightarrow e\\gamma) turn out to be the strongest ones, with slepton masses of order ~10 TeV or heavier required to obey the experimental limits. These sfermion masses are consistent with the observed large value m_H ~ 126 GeV of the Higgs mass. We discuss under what conditions such strong limits may be relaxed allowing for SUSY particle production at LHC.

Pablo G. Camara; Luis E. Ibanez; Irene Valenzuela

2013-07-11T23:59:59.000Z

145

Page comments  

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

home/ home/ http://www.nersc.gov/users/computational-systems/hopper/updates-and-status/open-issues/resolved-error-message-modulecmd-switch-c-172-error-152-module-prgenv-cray-is-currently-not-loaded/#PageComment_97 > module list 2>&1 | grep Prg 32) PrgEnv-gnu/4.1.40 I ignore the error but It's a bit uncomfortable that the error takes screen the space here are my loaded modules: > module list Currently Loaded Modulefiles: 1) modules/3.2.6.6 2) xtpe-network-gemini 3) darshan/2.2.6 4) atp/1.6.2 5) switch/1.0-1.0401.36779.2.72.gem 6) shared-root/1.0-1.0401.37253.3.50.gem 7) pdsh/2.26-1.0401.37449.1.1.gem 8) nodehealth/5.0-1.0401.38460.12.18.gem 9) lbcd/2.1-1.0401.35360.1.2.gem 10) hosts/1.0-1.0401.35364.1.115.gem 11) configuration/1.0-1.0401.35391.1.2.gem 12) ccm/2.2.0-1.0401.37254.2.142 13)

146

Gravitational Field of a Spinning Cosmic String  

E-Print Network (OSTI)

We study the effect of internal space rotation on the gravitational properties of infinite straight and stationary cosmic string. From the approximate solution of Einsten equations for the spinning Q-lump string we obtain long range gravitational accelleration resembling that of a rotating massive cylindrical shell. We also compute the angular velocity of the inertial frame dragging and the angle of light deflection by the Q-lump string. Matter accretion on to spinning strings can play a role in galaxy formation when the angular velocity times the string width is comparable to the speed of light.

Eugen Simanek

2008-03-02T23:59:59.000Z

147

Superconducting Hair on Charged Black String Background  

E-Print Network (OSTI)

Behaviour of Dirac fermions in the background of a charged black string penetrated by an Abelian Higgs vortex is elaborated. One finds the evidence that the system under consideration can support fermion fields acting like a superconducting cosmic string in the sence that a nontrivial Dirac fermion field can be carried by the system in question. The case of nonextremal and extremal black string vortex systems were considered. The influence of electric and Higgs charge, the winding number and the fermion mass on the fermion localization near the black string event horizon was studied. It turned out that the extreme charged black string expelled fermion fields more violently comparing to the nonextremal one.

Lukasz Nakonieczny; Marek Rogatko

2012-01-25T23:59:59.000Z

148

Subsurface Knowledge Reference Page | Department of Energy  

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

Subsurface Knowledge Reference Page Subsurface Knowledge Reference Page Subsurface Knowledge Reference Page The below listing provides additional references related to Subsurface & Groundwater Remediation. The references are categorized by documents types (e.g., Strategic Plans, Groundwater Plume Map Booklets, etc.) and under each "document type", there is a list of documents and/or hyperlinks to a reference. The Subsurface Knowledge Reference Page will continue to reflect additional information as it is identified. Strategic Plans Scientific Opportunities to Reduce Risk in Groundwater and Soil Remediation Scientific Opportunities for Monitoring at Environmental Remediation Sites (SOMERS) Groundwater Plume Map Booklets Groundwater Contamination and Treatment at Department of Energy Sites -

149

Untitled Page  

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

Environmental Reporting Requirements Environmental Reporting Requirements (To filter the table, type a word or phrase in the boxes below that corresponds with the column you would like to filter. Example, in the box above Report type "monitoring", then select the Go button or use the Enter key on your keyboard) (To reset your filter delete the contents from the boxes and select the Go button or the Enter key) Report Type-Scheduled Unscheduled Frequency Due Date Origin of Requirement Reference Preparing Organization(s) Reviewing Organization(s) Recipient(s) Semiannual Volatile Organic Compound (VOC ) Monitoring Hydrogen-Methane Report S Semiannually 26-Oct and 26-Apr NMHWA HWFP IV.F.2.b The Permittees shall report to the Secretary semiannually, beginning twelve months after issuance of this Permit, The data and analysis of the VOC Monitoring Plan.

150

Open Strings on D-Branes and Hagedorn Regime in String Gas Cosmology  

E-Print Network (OSTI)

We consider early time cosmic evolution in string gas cosmology dominated by open strings attached to D-branes. After reviewing statistical properties of open strings in D-brane backgrounds, we use dilaton-gravity equations to determine the string frame fields. Although, there are distinctions in the Hagedorn regime thermodynamics and dilaton coupling as compared to closed strings, it seems difficult to avoid Jeans instability and assume thermal equilibrium simultaneously, which is already a known problem for closed strings. We also examine characteristics of a possible subsequent large radius regime in this setup.

Arslanargin, Ayse

2009-01-01T23:59:59.000Z

151

User Questionnaire Page  

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

Questionnaire Page 1 of 3 041613 TANDEM FACILITY USER QUESTIONNAIRE Organization: Contact Person:...

152

Sustainability of multi-field inflation and bound on string scale  

E-Print Network (OSTI)

We study the effects of the interaction terms between the inflaton fields on the inflationary dynamics in multi-field models. With power law type potential and interactions, the total number of e-folds may get considerably reduced and can lead to unacceptably short period of inflation. Also we point out that this can place a bound on the characteristic scale of the underlying theory such as string theory. Using a simple multi-field chaotic inflation model from string theory, the string scale is constrained to be larger than the scale of grand unified theory.

Jinn-Ouk Gong

2007-08-15T23:59:59.000Z

153

Bethe Ansaetze for GKP strings  

E-Print Network (OSTI)

Studying the scattering of excitations around a dynamical background has a long history in the context of integrable models. The Gubser-Klebanov-Polyakov string solution provides such a background for the string/gauge correspondence. Taking the conjectured all-loop asymptotic equations for the AdS_4/CFT_3 correspondence as the starting point, we derive the S-matrix and a set of spectral equations for the lowest-lying excitations. We find that these equations resemble closely the analogous equations for AdS_5/CFT_4, which are also discussed in this paper. At large values of the coupling constant we show that they reproduce the Bethe equations proposed to describe the spectrum of the low-energy limit of the AdS_4xCP^3 sigma model.

Benjamin Basso; Adam Rej

2013-06-07T23:59:59.000Z

154

Filter for a drill string  

DOE Patents (OSTI)

A filter for a drill string comprises a perforated receptacle having an open end and a perforated end and first and second mounting surfaces are adjacent the open end. A transmission element is disposed within each of the first and second mounting surfaces. A capacitor may modify electrical characteristics of an LC circuit that comprises the transmission elements. The respective transmission elements are in communication with each other and with a transmission network integrated into the drill string. The transmission elements may be inductive couplers, direct electrical contacts, or optical couplers. In some embodiments of the present invention, the filter comprises an electronic component. The electronic component may be selected from the group consisting of a sensor, a router, a power source, a clock source, a repeater, and an amplifier.

Hall, David R. (Provo, UT); Pixton, David S. (Lehi, UT); Briscoe, Michael (Lehi, UT); McPherson, James (Sandy, UT)

2007-12-04T23:59:59.000Z

155

Acoustical properties of drill strings  

DOE Green Energy (OSTI)

The recovery of petrochemical and geothermal resources requires extensive drilling of wells to increasingly greater depths. Real-time collection and telemetry of data about the drilling process while it occurs thousands of feet below the surface is an effective way of improving the efficiency of drilling operations. Unfortunately, due to hostile down-hole environments, telemetry of this data is an extremely difficult problem. Currently, commercial systems transmit data to the surface by producing pressure pulses within the portion of the drilling mud enclosed in the hollow steel drill string. Transmission rates are between two and four data bits per second. Any system capable of raising data rates without increasing the complexity of the drilling process will have significant economic impact. One alternative system is based upon acoustical carrier waves generated within the drill string itself. If developed, this method would accommodate data rates up to 100 bits per second. Unfortunately, the drill string is a periodic structure of pipe and threaded tool joints, the transmission characteristics are very complex and exhibit a banded and dispersive structure. Over the past forty years, attempts to field systems based upon this transmission method have resulted in little success. This paper examines this acoustical transmission problem in great detail. The basic principles of acoustic wave propagation in the periodic structure of the drill string are examined through theory, laboratory experiment, and field test. The results indicate the existence of frequency bands which are virtually free of attenuation and suitable for data transmission at high bit rates. 9 refs., 38 figs., 2 tabs.

Drumheller, D.S.

1988-08-01T23:59:59.000Z

156

Counting Strings, Wound and Bound  

E-Print Network (OSTI)

We analyze zero mode counting problems for Dirac operators that find their origin in string theory backgrounds. A first class of quantum mechanical models for which we compute the number of ground states arises from a string winding an isometric direction in a geometry, taking into account its energy due to tension. Alternatively, the models arise from deforming marginal bound states of a string winding a circle, and moving in an orthogonal geometry. After deformation, the number of bound states is again counted by the zero modes of a Dirac operator. We count these bound states in even dimensional asymptotically linear dilaton backgrounds as well as in Euclidean Taub-NUT. We show multiple pole behavior in the fugacities keeping track of a U(1) charge. We also discuss a second class of counting problems that arises when these backgrounds are deformed via the application of a heterotic duality transformation. We discuss applications of our results to Appell-Lerch sums and the counting of domain wall bound states.

Sujay K. Ashok; Suresh Nampuri; Jan Troost

2013-02-05T23:59:59.000Z

157

QCD String formation and the Casimir Energy  

E-Print Network (OSTI)

Three distinct scales are identified in the excitation spectrum of the gluon field around a static quark-antiquark pair as the color source separation R is varied. The spectrum, with string-like excitations on the largest length scales of 2-3 fm, provides clues in its rich fine structure for developing an effective bosonic string description. New results are reported from the three-dimensional Z(2) and SU(2) gauge models, providing further insight into the mechanism of bosonic string formation. The precocious onset of string-like behavior in the Casimir energy of the static quark-antiquark ground state is observed below R=1 fm where most of the string eigenmodes do not exist and the few stable excitations above the ground state are displaced. We find no firm theoretical foundation for the widely held view of discovering string formation from high precision ground state properties below the 1 fm scale.

K. Jimmy Juge; J. Kuti; C. Morningstar

2004-01-27T23:59:59.000Z

158

Spacelike Ricci Inheritance Vectors in a Model of String Cloud and String Fluid Stress Tensor  

E-Print Network (OSTI)

We study the consequences of the existence of spacelike Ricci inheritance vectors (SpRIVs) parallel to $x^a$ for model of string cloud and string fluid stress tensor in the context of general relativity. Necessary and sufficient conditions are derived for a spacetime with a model of string cloud and string fluid stress tensor to admit a SpRIV and a SpRIV which is also a spacelike conformal Killing vector (SpCKV). Also, some results are obtained.

H. Baysal; I. Yilmaz

2005-05-02T23:59:59.000Z

159

Gamma Ray Bursts from Ordinary Cosmic Strings  

E-Print Network (OSTI)

We give an upper estimate for the number of gamma ray bursts from ordinary (non-superconducting) cosmic strings expected to be observed at terrestrial detectors. Assuming that cusp annihilation is the mechanism responsible for the bursts we consider strings arising at a GUT phase transition and compare our estimate with the recent BATSE results. Further we give a lower limit for the effective area of future detectors designed to detect the cosmic string induced flux of gamma ray bursts.

R. H. Brandenberger; A. T. Sornborger; M. Trodden

1993-02-12T23:59:59.000Z

160

Free Field Theory as a String Theory?  

E-Print Network (OSTI)

An approach to systematically implement open-closed string duality for free large $N$ gauge theories is summarised. We show how the relevant closed string moduli space emerges from a reorganisation of the Feynman diagrams contributing to free field correlators. We also indicate why the resulting integrand on moduli space has the right features to be that of a string theory on $AdS$.

Rajesh Gopakumar

2004-09-23T23:59:59.000Z

Note: This page contains sample records for the topic "type string pages" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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161

TITLE PAGE  

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

Title: Seismic and Rockphysics Diagnostics of Title: Seismic and Rockphysics Diagnostics of Multiscale Reservoir Textures Type of Report: Final Technical Reporting Start Date: April 1, 2005 Reporting End Date: June 30, 2005 Principal Investigator: Prof. Gary Mavko Date of Report: July 2005 DOE Award Number: DE-FC26-01BC15354 Submitting Organization: Stanford University, 651 Serra Street, Suite 260, Stanford, CA 94305-4125 1 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 warrantee, 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

162

RHIC | String Theory Predicts an Experimental Result  

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

Note: This is a February 2009 article written by Glennda Chui that originally appeared in the online publication symmetry breaking. A first: String theory predicts an experimental...

163

Optimization Online - String-Averaging Projected Subgradient ...  

E-Print Network (OSTI)

Aug 29, 2013 ... Optimization Online. String-Averaging Projected Subgradient Methods for Constrained Minimization. Yair Censor(yair ***at*** math.haifa.ac.il)

164

Convergence and Perturbation Resilience of Dynamic String ...  

E-Print Network (OSTI)

Jun 1, 2012 ... Optimization Online. Convergence and Perturbation Resilience of Dynamic String-Averaging Projection Methods. Yair Censor(yair ***at*** ...

165

A 0-1 String Example - CECM  

E-Print Network (OSTI)

help · annotate · Contents Next: Solution Up: No Title Previous: Initializing the Software. A 0-1 String Example. [Annotate] · [Shownotes]. Find the generating ...

166

The Effective Theory of Long Strings  

E-Print Network (OSTI)

We present the low-energy effective theory on long strings in quantum field theory, including a streamlined review of previous literature on the subject. Such long strings can appear in the form of solitonic strings, as in the 4d Abelian Higgs model, or in the form of confining strings, as in Yang-Mills theories. The bottom line is that upon expanding in powers of 1/L the energy levels of long (closed) strings (where L is the length of the string), all the terms up to (and including) order 1/L^5 are universal. We argue that for excited strings in D>3 space-time dimensions there is a universal deviation at order 1/L^5 from the naive formula that is usually used to fit lattice results. For D=3 this naive formula is valid even at order 1/L^5. At order 1/L^7 non-universal terms generically appear in all cases. We explain the physical origin of these results, and illuminate them in three different formulations of the effective action of long strings (the relationships among which we partly clarify). In addition, we corroborate these results by an explicit computation of the effective action on long strings in confining theories which have a gravitational dual. These predictions can be tested by precise simulations of 4d Yang-Mills theory on the lattice.

Ofer Aharony; Zohar Komargodski

2013-02-25T23:59:59.000Z

167

Forecast constraints on cosmic strings from future CMB, pulsar timing and gravitational wave direct detection experiments  

E-Print Network (OSTI)

We study future observational constraints on cosmic string parameters from various types of next-generation experiments: direct detection of gravitational waves (GWs), pulsar timing array, and the cosmic microwave background (CMB). We consider both GW burst and stochastic GW background searches by ground- and space-based interferometers as well as GW background detection in pulsar timing experiments. We also consider cosmic string contributions to the CMB temperature and polarization anisotropies. These different types of observations offer independent probes of cosmic strings and may enable us to investigate cosmic string properties if the signature is detected. In this paper, we evaluate the power of future experiments to constrain cosmic string parameters, such as the string tension Gmu, the initial loop size alpha, and the reconnection probability p, by performing Fisher information matrix calculations. We find that combining the information from the different types of observations breaks parameter degeneracies and provides more stringent constraints on the parameters. We also find future space-borne interferometers independently provide a highly precise determination of the parameters.

Sachiko Kuroyanagi; Koichi Miyamoto; Toyokazu Sekiguchi; Keitaro Takahashi; Joseph Silk

2012-10-10T23:59:59.000Z

168

8.251 String Theory for Undergraduates, Spring 2003  

E-Print Network (OSTI)

Introduction to the main concepts of string theory to undergraduates. Since string theory is quantum mechanics of a relativistic string, the foundations of the subject can be explained to students exposed to both special ...

Zwiebach, Barton

169

8.251 String Theory for Undergraduates, Spring 2005  

E-Print Network (OSTI)

Introduction to the main concepts of string theory to undergraduates. Since string theory is quantum mechanics of a relativistic string, the foundations of the subject can be explained to students exposed to both special ...

Zwiebach, Barton

170

Topics in String Duality: D-Branes and Geometry  

E-Print Network (OSTI)

5.3. The Closed StringSUSY Duality . . 5.1. Field Theory 5.2. The String TheoryCalabi-Yau Threefolds . 6.1.1. String duality and Calabi-Yau

Beem, Christopher John

2010-01-01T23:59:59.000Z

171

Help:Editing pages | Open Energy Information  

Open Energy Info (EERE)

pages pages Jump to: navigation, search It's very easy to edit the contents of a wiki. It only takes a few clicks. Click the "Edit" page tab at the top of the page. Make changes to the text. Click the "Save page" button. Simple as that! Contents 1 Editing rules, editing conventions, and formatting 2 Edit Summary 3 Preview 4 Other types of editing 5 Discussion Editing rules, editing conventions, and formatting The number one rule of wiki editing, is to be bold. Dive in and make changes. Other people can correct mistakes later, so have confidence, and give it a try! There can be all kinds of editing conventions, rules, and philosophy governing the editing of wiki pages, but the "be bold" rule overrides these! In general try to write clearly and concisely and make sure you are always

172

Bosonic and Baryonic String Theory in Quantum Chromodynamics  

Science Conference Proceedings (OSTI)

Bosonic string formation in gauge theories is reviewed with particular attention to the confining flux in lattice QCD and its effective string theory description. Recent results on the Casimir energy of the ground state and the string excitation spectrum are analyzed in the Dirichlet string limit of large separation between static sources. The closed string-soliton (torelon) with electric flux winding around a compact dimension is discussed and a new bound state tower spectrum at baryon string junctions is presented.

Kuti, Julius [Department of Physics, University of California, San Diego, La Jolla, California 92093 (United States)

2007-02-27T23:59:59.000Z

173

On the string solution in the SUSY - Skyrme model  

E-Print Network (OSTI)

In this paper, we have found the string solution in the SUSY Skyrme model. Moreover, the mechanics of decay of SUSY - string was discussed.

Pham Thuc Tuyen; Do Quoc Tuan

2008-03-19T23:59:59.000Z

174

On the String Averaging Method for Sparse Common Fixed Points ...  

E-Print Network (OSTI)

Jul 10, 2008 ... gate a string-averaging algorithmic scheme that favorably handles the ... are special cases of the string-averaging and of the BIP algorithmic ...

175

Special pages | Open Energy Information  

Open Energy Info (EERE)

property Semantic search Maps Map editor Other special pages Book sources Copy a page Duplicate a page Edit Count SparqlExtension Retrieved from "http:...

176

EERE: Page Not Found  

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

Site Search Search Help Page Not Found We're sorry, but the page you're looking for may have been removed, has changed, or is unavailable. To find the information you need, you may...

177

David Gates home page  

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

Gates home page http:www.pppl.gov%7EdgatesSiteDr.DavidA.Gates.html (1 of 4) 8302012 9:47:58 AM David Gates home page Dr. David A. Gates Princeton Plasma Physics...

178

Heavy ions and string theory  

E-Print Network (OSTI)

We review a selection of recent developments in the application of ideas of string theory to heavy ion physics. Our topics divide naturally into equilibrium and non-equilibrium phenomena. On the non-equilibrium side, we discuss generalizations of Bjorken flow, numerical simulations of black hole formation in asymptotically anti-de Sitter geometries, equilibration in the dual field theory, and hard probes. On the equilibrium side, we summarize improved holographic QCD, extraction of transport coefficients, inclusion of chemical potentials, and approaches to the phase diagram. We close with some possible directions for future research.

Oliver DeWolfe; Steven S. Gubser; Christopher Rosen; Derek Teaney

2013-04-29T23:59:59.000Z

179

Constraints on the Fundamental String Coupling from B-Mode Experiments  

Science Conference Proceedings (OSTI)

We study signatures of cosmic superstring networks containing strings of multiple tensions and Y junctions, on the cosmic microwave background (CMB) temperature and polarization spectra. Focusing on the crucial role of the string coupling constant g{sub s}, we show that the number density and energy density of the scaling network are dominated by different types of string in the g{sub s}{approx}1 and g{sub s}string tension {mu}{sub F} from upcoming and future CMB polarization experiments, as well as the signal to noise in detecting the difference between B-mode signals in the limiting cases of large and small g{sub s}. We show that such a detectable shift is within reach of planned experiments.

Avgoustidis, A. [Centre for Theoretical Cosmology, DAMTP, CMS, Wilberforce Road, Cambridge CB3 0WA (United Kingdom); Copeland, E. J. [School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD (United Kingdom); Moss, A. [Department of Physics and Astronomy, University of British Columbia, Vancouver, BC (Canada); Pogosian, L. [Department of Physics, Simon Fraser University, Burnaby, BC, V5A 1S6 (Canada); Pourtsidou, A. [Jodrell Bank Centre for Astrophysics, University of Manchester, Manchester M13 9PL (United Kingdom); Steer, Daniele A. [APC, UMR 7164, 10 rue Alice Domon et Leonie Duquet, 75205 Paris Cedex 13 (France)

2011-09-16T23:59:59.000Z

180

Page not found | Department of Energy  

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

51 - 25160 of 26,764 results. 51 - 25160 of 26,764 results. Page Existing Commercial Reference Buildings Constructed In or After 1980 The files on this page contain commercial reference building models for existing buildings constructed in or after 1980, organized by building type and location. These U.S. Department of Energy ... http://energy.gov/eere/buildings/existing-commercial-reference-buildings-constructed-or-after-1980 Page Existing Commercial Reference Buildings Constructed Before 1980 The files on this page contain commercial reference building models for existing buildings constructed before 1980, organized by building type and location. These U.S. Department of Energy (DOE)... http://energy.gov/eere/buildings/existing-commercial-reference-buildings-constructed-1980 Page EnergyPlus Energy Simulation Software

Note: This page contains sample records for the topic "type string pages" 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

Committee Home Page - TMS  

Science Conference Proceedings (OSTI)

The committee home pages are designed to facilitate communication among committee members while simultaneously educating all members about the ...

182

From Quantum Mechanics to String Theory  

E-Print Network (OSTI)

From Quantum Mechanics to String Theory Relativity (why it makes sense) Quantum mechanics Extra Dimensions Strings and the Strong Force Thursday, June 4, 2009 #12;The Higgs Mechanism Summary Mechanical Particle Physics General Relativistic Quantum Gravity increasing speed decreasing size increasing

183

Melt dumping in string stabilized ribbon growth  

DOE Patents (OSTI)

A method and apparatus for stabilizing the edge positions of a ribbon drawn from a melt includes the use of wettable strings drawn in parallel up through the melt surface, the ribbon being grown between the strings. A furnace and various features of the crucible used therein permit continuous automatic growth of flat ribbons without close temperature control or the need for visual inspection.

Sachs, Emanuel M. (42 Old Middlesex Rd., Belmont, MA 02178)

1986-12-09T23:59:59.000Z

184

String Gas Cosmology and Non-Gaussianities  

E-Print Network (OSTI)

Recently it has been shown that string gas cosmology, an alternative model of the very early universe which does not involve a period of cosmological inflation, can give rise to an almost scale invariant spectrum of metric perturbations. Here we calculate the non-Gaussianities of the spectrum of cosmological fluctuations in string gas cosmology, and find that these non-Gaussianities depend linearly on the wave number and that their amplitude depends sensitively on the string scale. If the string scale is at the TeV scale, string gas cosmology could lead to observable non-Gaussianities, if it is close to the Planck scale, then the non-Gaussianities on current cosmological scales are negligible.

Bin Chen; Yi Wang; Wei Xue; Robert Brandenberger

2007-12-14T23:59:59.000Z

185

Category:Financial Incentives Incentive Types | Open Energy Informatio...  

Open Energy Info (EERE)

Financial Incentives Incentive Types Jump to: navigation, search Financial Incentive Types. Pages in category "Financial Incentives Incentive Types" The following 14 pages are in...

186

Category:CBECS Building Types | Open Energy Information  

Open Energy Info (EERE)

CBECS Building Types Jump to: navigation, search This category uses the form CBECS Building Type. Pages in category "CBECS Building Types" The following 16 pages are in this...

187

SI Group Scheduling Page  

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

Personnel On-Call Page Beamline Validation Schedule Group Organizational Chart Reviews Presentations Group Scheduling Page Project Scheduling Information Ops Scheduling Info Project / Scheduling Info APS fy2005 Annual Schedule ( html ) PSS Validation Schedule APS fy2006 Annual Schedule (html) PSS Validation Teams Latest Machine Studies Schedule (pdf) (html) New Builds Schedule (For SI GROUP Reference Only) Parasitic Beam Operations Schedule Ops Scheduling Page Shutdown Information Work Schedules August/September Shutdown Shutdown Work List Validation Schedule Safety Info Work Request Links ISM Core Functions Enter / Search Work Requests APS Safety Page Modify / Approve Work Requests Radiation Safety Policy APS TMS Training Profiles MSDS Search This page maintained by Joe Budz

188

Using landing pages for sponsored search ad selection  

Science Conference Proceedings (OSTI)

We explore the use of the landing page content in sponsored search ad selection. Specifically, we compare the use of the ad's intrinsic content to augmenting the ad with the whole, or parts, of the landing page. We explore two types of extractive summarization ... Keywords: compositional semantics, extractive summarization, landing pages, sponsored search

Yejin Choi; Marcus Fontoura; Evgeniy Gabrilovich; Vanja Josifovski; Mauricio Mediano; Bo Pang

2010-04-01T23:59:59.000Z

189

3D in Web Pages  

Science Conference Proceedings (OSTI)

3D in Web Pages. This page is currently under construction! Return to Visualization. *. Bookmark and Share. Return to Visualization.

2011-12-05T23:59:59.000Z

190

Excitation Fields in a Superconducting Global String  

E-Print Network (OSTI)

A model of a straight superconducting global cosmic string is examined in a setting wherein the string supports a charge/current pulse described by a travelling wave along the string. Linearized field equations are obtained for fluctuations of the scalar and vector fields of the theory, and a set of approximate particular solutions are found for the case in which the linear charge density and the current of the string have equal magnitudes. Although the equations of motion seem to suggest that the scalar and vector excitation fields are massive inside the string core, the particular solutions show that they behave as effectively massless fields which propagate at the speed of light along the string along with the primary charge/current pulse. The effect of the mass parameter is to modulate the radial profile of the excitation fields. The vector excitation field generates radial and angular components for both the electric and magnetic fields, but the particular solutions do not describe the emission or absorption of electromagnetic radiation from the string.

J. R. Morris

1995-09-28T23:59:59.000Z

191

Cerenkov radiation from moving straight strings  

E-Print Network (OSTI)

We study Cerenkov radiation from moving straight strings which glisse with respect to each other in such a way that the projected intersection point moves faster than light. To calculate this effect we develop classical perturbation theory for the system of Nambu-Goto strings interacting with dilaton, two-form and gravity. In the first order one encounters divergent self-action terms which are eliminated by classical renormalization of the string tension. Cerenkov radiation arises in the second order. It is generated by an effective source which contains contributions localized on the strings world-sheets and bulk contributions quadratic in the first order fields. In the ultra-relativistic limit radiation exhibits angular peaking on the Cerenkov cone in the forward direction of the fast string in the rest frame of another. The radiation spectrum then extends up to high frequencies proportional to square of the Lorentz-factor of the relative velocity. Gravitational radiation is absent since the 1+2 space-time transverse to the straight string does not allow for gravitons. A rough estimate of the Cerenkov radiation in the cosmological cosmic strings network is presented.

D. V. Gal'tsov; E. Yu. Melkumova; K. Salehi

2006-12-30T23:59:59.000Z

192

Cerenkov radiation from moving straight strings  

Science Conference Proceedings (OSTI)

We study Cerenkov radiation from moving straight strings which slide with respect to each other in such a way that the projected intersection point moves faster than light. To calculate this effect we develop classical perturbation theory for the system of Nambu-Goto strings interacting with the dilaton, two-form, and gravity fields. In the first order, one encounters divergent self-action terms which are eliminated by classical renormalization of the string tension. Cerenkov radiation arises in the second order. It is generated by an effective source which contains contributions localized on the string world sheets and bulk contributions quadratic in the first-order fields. In the ultrarelativistic limit radiation exhibits angular peaking on the Cerenkov cone in the forward direction of the fast string in the rest frame of another. The radiation spectrum then extends up to high frequencies proportional to the square of the Lorentz factor of the relative velocity. Gravitational radiation is absent since the 1+2 space-time transverse to the straight string does not allow for gravitons. A rough estimate of the Cerenkov radiation in the cosmological cosmic strings network is presented.

Gal'tsov, D. V.; Melkumova, E. Yu.; Salehi, K. [Department of Physics, Moscow State University, 119899, Moscow (Russian Federation)

2007-05-15T23:59:59.000Z

193

Cosmic String constraints from WMAP and SPT  

E-Print Network (OSTI)

The predictions of the inflationary LCDM paradigm match today's high-precision measurements of the cosmic microwave background anisotropy with remarkable precision. The same data put tight limits on other sources of anisotropy. Cosmic strings are a particularly interesting alternate source to constrain. Strings are topological defects, remnants of inflationary-era physics that persist after the big bang. They are formed in a variety of models of inflation, including popular string theory models such as brane inflation. In this paper, we show that measurements of temperature anisotropy by the South Pole Telescope break a parameter degeneracy in the WMAP data, permitting us to place a strong upper limit on the possible string contribution to the CMB anisotropy: the power sourced by zero-width strings must be <1.75% (95% CL) of the total. In the model we use, this translates to an upper limit on the string tension of Gmu < 1.7x10^{-7}. These limits imply that the best hope for detecting strings in the CMB ...

Dvorkin, Cora; Hu, Wayne

2011-01-01T23:59:59.000Z

194

Property:NEPA FundingNumber | Open Energy Information  

Open Energy Info (EERE)

Jump to: navigation, search Property Name NEPA FundingNumber Property Type String This is a property of type String. Pages using the property "NEPA FundingNumber"...

195

Apparatus in a drill string  

DOE Patents (OSTI)

An apparatus in a drill string comprises an internally upset drill pipe. The drill pipe comprises a first end, a second end, and an elongate tube intermediate the first and second ends. The elongate tube and the ends comprising a continuous an inside surface with a plurality of diameters. A conformable spirally welded metal tube is disposed within the drill pipe intermediate the ends thereof and terminating adjacent to the ends of the drill pipe. The conformable metal tube substantially conforms to the continuous inside surface of the metal tube. The metal tube may comprise a non-uniform section which is expanded to conform to the inside surface of the drill pipe. The non-uniform section may comprise protrusions selected from the group consisting of convolutions, corrugations, flutes, and dimples. The non-uniform section extends generally longitudinally along the length of the tube.

Hall, David R. (Provo, UT); Dahlgren, Scott (Alpine, UT); Hall, Jr., Tracy H. (Provo, UT); Fox, Joe (Lehi, UT); Pixton, David S. (Provo, UT)

2007-07-17T23:59:59.000Z

196

Thermodynamic nonextensivity in a closed string gas  

E-Print Network (OSTI)

Well known results in string thermodynamics show that there is always a negative specific heat phase in the microcanonical description of a gas of closed free strings whenever there are no winding modes present. We will carefully compute the number of strings in the gas to show how this negative specific heat is related to the fact that the system does not have thermodynamic extensivity. We will also discuss the consequences for a system of having a microcanonical negative specific heat versus the exact result that such a thing cannot happen in any canonical (fixed temperature) description.

Manuel A. Cobas; M. A. R. Osorio; María Suárez

2004-06-04T23:59:59.000Z

197

Note on tachyon moduli and closed strings  

SciTech Connect

The collective behavior of the SL(2,R) covariant brane states of noncritical c=1 string theory, found in a previous work, is studied in the Fermi liquid approximation. It is found that such states mimic the coset WZW model, whereas only by further restrictions one recovers the double-scaling limit which was purported to be equivalent to closed string models. Another limit is proposed, inspired by the tachyon condensation ideas, where the spectrum is the same of two-dimensional string theory. We close by noting some strange connections between vacuum states of the theory in their different interpretations.

Carneiro da Cunha, Bruno [Helsinki Institute of Physics, P.O. Box 64, FIN-00014 University of Helsinki (Finland) and Departamento de Fisica, Universidade Federal de Pernambuco, CEP 53901-970, Recife, Pernambuco (Brazil)

2008-07-15T23:59:59.000Z

198

Thermal history of the string universe  

E-Print Network (OSTI)

Thermal history of the string universe based on the Brandenberger and Vafa's scenario is examined. The analysis thereby provides a theoretical foundation of the string universe scenario. Especially the picture of the initial oscillating phase is shown to be natural from the thermodynamical point of view. A new tool is employed to evaluate the multi state density of the string gas. This analysis points out that the well-known functional form of the multi state density is not applicable for the important region $T \\leq T_H$, and derives a correct form of it.

H. Cateau; K. Sumiyoshi

1992-05-27T23:59:59.000Z

199

Current discontinuities on superconducting cosmic strings  

Science Conference Proceedings (OSTI)

The propagation of current perturbations on superconducting cosmic strings is considered. The conditions for the existence of discontinuities similar to shock waves have been found. The formulas relating the string parameters and the discontinuity propagation speed are derived. The current growth law in a shock wave is deduced. The propagation speeds of shock waves with arbitrary amplitudes are calculated. The reason why there are no shock waves in the case of time-like currents (in the 'electric' regime) is explained; this is attributable to the shock wave instability with respect to perturbations of the string world sheet.

Troyan, E., E-mail: et@iaaru.astronautiko.org; Vlasov, Yu. V. [Moscow Institute of Physics and Technology (Russian Federation)

2011-07-15T23:59:59.000Z

200

String resonances at the Large Hadron Collider  

E-Print Network (OSTI)

The Large Hadron Collider promises to discover new physics beyond the Standard Model. An exciting possibility is the formation of string resonances at the TeV scale. In this article, we show how string resonances may be detected at the LHC in the $pp\\to\\gamma+jet$ channel. Our study is based on event shape variables, missing energy and momentum, maximum transverse momentum of photons and dijet invariant mass. These observables provide interesting signatures which enable us to discriminate string events from the Standard Model background.

Arunava Roy; Marco Cavaglia

2009-02-09T23:59:59.000Z

Note: This page contains sample records for the topic "type string pages" 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

Fundamental String (Membrane) Orbiting D5(M5)-branes  

E-Print Network (OSTI)

We study fundamental string (F-string) dynamics near D5-brane in some limits. We find that when the angular momentum of the probe is proportional to string length (l_s) and square root of string coupling constant {g_s}, the F-string lies in its metastable orbit at a finite distance from D5-branes. We further study the metastable orbits of a M2-brane in M5-brane background.

Nayak, Rashmi R

2010-01-01T23:59:59.000Z

202

Geothermal: Home Page  

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

GEOTHERMAL TECHNOLOGIES LEGACY COLLECTION - Home Page Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us HomeBasic Search About Publications Advanced...

203

Activity Seven, Student Page  

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

Seven -- Picturing Particles (Student Page) Whether they are called atom smashers, accelerators or colliders, the massive devices used for research by particle physicists all...

204

Activity Four, Student Page  

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

Four -- Tracking Unseen Particles (Student Page) This experiment demonstrates how particle detectors work and why they are multi-layered, as shown in the cutaway and schematic...

205

A Fast and Accurate Thermistor String  

Science Conference Proceedings (OSTI)

A “fast thermistor string” has been built to accommodate the scientific need to accurately monitor internal wave activity in shelf seas and above sloping bottoms in the ocean. The performance of the thermistors and their custom-designed ...

H. van Haren; R. Groenewegen; M. Laan; B. Koster

2001-02-01T23:59:59.000Z

206

String model for spinning quark jets  

Science Conference Proceedings (OSTI)

A string model of quark hadronization, taking the quark spin degree of freedom into account, is proposed. The method for using the model in a Monte-Carlo code for jet generation is given.

Artru, X.; Belghobsi, Z. [Universite de Lyon, CNRS/IN2P3 and Universite Lyon 1, Institut de Physique Nucleaire de Lyon, Laboratoire de Physique Theorique, Universite de Jijel (Algeria)

2012-06-27T23:59:59.000Z

207

String field theory and tachyon dynamics  

E-Print Network (OSTI)

In this thesis we present some works done during my doctoral studies. These results focus on two directions. The first one is motivated by tachyon dynamics in open string theory. We calculate the stress tensors for the ...

Yang, Haitang, Ph. D. Massachusetts Institute of Technology

2006-01-01T23:59:59.000Z

208

Open string in a nonrelativistic background  

Science Conference Proceedings (OSTI)

This paper is devoted to the study of the open string description of Wilson loops and quarks in nonrelativistic quantum field theory that are expected to be dual of gravity in Schroedinger space-time.

Kluson, J. [Department of Theoretical Physics and Astrophysics, Faculty of Science, Masaryk University, Kotlarska 2, 611 37, Brno (Czech Republic)

2010-05-15T23:59:59.000Z

209

Effective string theory and QCD scattering amplitudes  

Science Conference Proceedings (OSTI)

QCD string is formed at distances larger than the confinement scale and can be described by the Polchinski-Strominger effective string theory with a nonpolynomial action, which has nevertheless a well-defined semiclassical expansion around a long-string ground state. We utilize modern ideas about the Wilson-loop/scattering-amplitude duality to calculate scattering amplitudes and show that the expansion parameter in the effective string theory is small in the Regge kinematical regime. For the amplitudes we obtain the Regge behavior with a linear trajectory of the intercept (d-2)/24 in d dimensions, which is computed semiclassically as a momentum-space Luescher term, and discuss an application to meson scattering amplitudes in QCD.

Makeenko, Yuri [Institute of Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117218 Moscow (Russian Federation)

2011-01-15T23:59:59.000Z

210

The pomeron in closed bosonic string theory  

Science Conference Proceedings (OSTI)

We compute the couplings of the pomeron to the first few mass levels of closed bosonic string states in flat space. We recognize the deviation from the linearity of the Regge trajectories in a five dimensional anti De Sitter background.

Fazio, A. R. [Departamento de fisica, Universidad Nacional de Colombia, Ciudad Universitaria, Bogota D.C. (Colombia)

2010-12-22T23:59:59.000Z

211

Related Frog Web Pages  

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

Related Web Pages on Frogs Related Web Pages on Frogs The images of the frog in this kit are computer-generated. For another approach, in which photos and movies are used to follow an actual frog dissection, see the University of Virginia's pages here. For a lot of kid-oriented information about frogs, see Frogland. For live frog lovers .... Sounds of North American Frogs (a CD from Smithsonian Folkways). The Exploratorium in San Francisco maintains an on-line exhibit on frogs. Don't Dissect a Frog, Build it is a section in Nicholas Negroponte's online version of Being Digital. For veterinary and conservation issues, see Association of Reptilian and Amphibian Veterinarians. And of course, The FROGGY Page Berkeley Lab | ACS | Notice to Users | Whole Frog Project | Virtual Frog Page last modified: 01/26/05

212

Property:NEPA SerialRegisterPage | Open Energy Information  

Open Energy Info (EERE)

SerialRegisterPage SerialRegisterPage Jump to: navigation, search Property Name NEPA SerialRegisterPage Property Type Page Description Serial Register Page files for NEPA Docs. Related Serial Register Pages from BLM's LR2000 (http://www.blm.gov/lr2000/ This is a property of type Page. It links to pages that use the form NEPA_Doc. Pages using the property "NEPA SerialRegisterPage" Showing 25 pages using this property. (previous 25) (next 25) D DOI-BLM-ID-B010-2010-0083-CX + IDI-036765 + DOI-BLM-NV-063-EA08-091 + NVN-087409-SRP-ROW-Transmission.pdf +, NVN-083483X-NOI-Unit.pdf +, NVN-083484X-SRP-UNIT.pdf + DOI-BLM-NV-B010-2011-0015-EA + NVN-084268X-SRP-Unit.pdf + DOI-BLM-NV-B020-2011-0017-CX + File:NVN-089289.pdf + DOI-BLM-NV-B020-2011-0026-EA + NVN-089376X-SRP-UNIT.pdf +

213

Detection of Atmospheric Muon Neutrinos with the IceCube 9-String Detector  

E-Print Network (OSTI)

Neutrinos with the IceCube 9-String Detector A. Achterberg,Neutrinos with the IceCube 9-String Detector The IceCube17 me- ters apart in strings of 60. Strings are arranged on

Achterberg, A.; IceCube Collaboration

2008-01-01T23:59:59.000Z

214

Page not found | Department of Energy  

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

Error message Error message The page you requested does not exist. For your convenience, a search was performed using the query sites prod files 11 COMM 11 L 23. You are here Home » Page not found Page not found Oops! The page you are looking for doesn't seem to be available. Did you find a broken link? Tell us and we'll fix it. Or maybe you meant to go somewhere else? Use the search box or links below to help guide you. Enter terms sites prod files 11 COMM 11 L 23 Search Showing 26171 - 26180 of 28,904 results. Rebate Vectren Energy Delivery of Ohio (Gas)- Commercial Energy Efficiency Rebates Vectren Energy Delivery offers commercial natural gas customers in Ohio rebates for the installation of certain types of efficient natural gas equipment. Prescriptive equipment rebates are...

215

Low-Energy Supersymmetry Breaking from String Flux Compactifications: Benchmark Scenarios  

E-Print Network (OSTI)

Soft supersymmetry breaking terms were recently derived for type IIB string flux compactifications with all moduli stabilised. Depending on the choice of the discrete input parameters of the compactification such as fluxes and ranks of hidden gauge groups, the string scale was found to have any value between the TeV and GUT scales. We study the phenomenological implications of these compactifications at low energy. Three realistic scenarios can be identified depending on whether the Standard Model lies on D3 or D7 branes and on the value of the string scale. For the MSSM on D7 branes and the string scale between 10^12 GeV and 10^17 GeV we find that the LSP is a neutralino, while for lower scales it is the stop. At the GUT scale the results of the fluxed MSSM are reproduced, but now with all moduli stabilised. For the MSSM on D3 branes we identify two realistic scenarios. The first one corresponds to an intermediate string scale version of split supersymmetry. The second is a stringy mSUGRA scenario. This requires tuning of the flux parameters to obtain the GUT scale. Phenomenological constraints from dark matter, (g-2)_mu and BR(b->s gamma) are considered for the three scenarios. We provide benchmark points with the MSSM spectrum, making the models suitable for a detailed phenomenological analysis.

Benjamin C. Allanach; Fernando Quevedo; Kerim Suruliz

2005-12-06T23:59:59.000Z

216

Classical string solutions in AdS{sub 5}xS{sup 5}  

Science Conference Proceedings (OSTI)

We discuss some new simple closed bosonic string solutions in AdS{sub 5}xS{sup 5} that may be of interest in the context of AdS/CFT duality. In the first part of this work we consider solutions with two spins (S{sub 1},S{sub 2}) in AdS{sub 5}. Starting from the flat-space solutions and using perturbation theory in the curvature of AdS{sub 5} space, we construct leading terms in the small two-spin solution. We find corrections to the leading Regge term in the classical string energy and uncover a discontinuity in the spectrum for a certain type of solution. We then analyze the connection between small-spin and large-spin limits of string solutions in AdS{sub 5}. We show that the S{sub 1}=S{sub 2} solution in AdS{sub 5} found in earlier papers admits both limits only in the simplest cases of the folded and rigid circular strings. In the second part of the paper, we construct a new class of chiral solutions in R{sub t}xS{sup 5} for which embedding coordinates of S{sup 5} satisfy the linear Laplace equations. They generalize the previously studied rigid string solutions. We study in detail a simple nontrivial example.

Murchikova, E. M. [Blackett Laboratory, Imperial College, London SW7 2AZ (United Kingdom); SINP, Moscow State University, 119991, Moscow (Russian Federation)

2011-02-15T23:59:59.000Z

217

Nonperturbative Corrections to 4D String Theory Effective Actions from SL(2,Z) Duality and Supersymmetry  

SciTech Connect

We find the D(-1)- and D1-brane instanton contributions to the hypermultiplet moduli space of type IIB string compactifications on Calabi-Yau threefolds. These combine with known perturbative and world sheet instanton corrections into a single modular invariant function that determines the hypermultiplet low-energy effective action.

Robles-Llana, Daniel; Saueressig, Frank; Vandoren, Stefan [Institute for Theoretical Physics and Spinoza Institute, Utrecht University, 3508 TD Utrecht (Netherlands); Rocek, Martin [C.N. Yang Institute for Theoretical Physics, Stony Brook University, New York 11794-3840 (United States); Theis, Ulrich [Institute for Theoretical Physics, Friedrich-Schiller-University Jena, D-07743 Jena (Germany)

2007-05-25T23:59:59.000Z

218

Page 1 of2  

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

Page 1 of2 The DOE Executive Salary Approval parameters contained in AL2000-12 are hereby reinstated pending final issuance of revised DOE Order 350.1 X, Contractor Human Resources...

219

EERE: Multimedia Home Page  

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

on Digg Find More places to share EERE: Multimedia Home Page on AddThis.com... Home Animations Photographs Videos Audio Contacts On this site you'll find links to the animations,...

220

PSFCP -- Home Page  

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

find all documents that are related to this acquisition. List of Supporting Documents (weblink) http:www.directives.doe.gov To return to the Home Page, click on the NNSA logo....

Note: This page contains sample records for the topic "type string pages" 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

Sample page | Open Energy Information  

Open Energy Info (EERE)

Sample page Sample page Jump to: navigation, search This page has been rated 13[1][2] on the scale of awesomness. This page is awesome! The above text is generated by the SampleTemplate. Try editing it and changing the level of awesomeness to see the template react. Hint: It says something different depending on whether or not the page is at least 5 awesome. This page is related to the following topics[3][4]: References Sample pages Help pages Additional Info Name Sample page Awesomeness 13 Topics (raw) References; Sample pages; Help pages; References ↑ Francis C. Monastero. 2002. An overview of industry-military cooperation in the development of power operations at the Coso geothermal field in southern California. GRC Bulletin. . ↑ EPRI. 12/12/2012. Assessment and Mapping of the Riverine

222

EMIS Quick User Guide Search page (details on page 2)  

E-Print Network (OSTI)

search terms in foreign languages You can enter search terms in foreign languages by: - Using your: Please note that we have a Cyrillic and Arabic keyboards available through the Search page. EnteringEMIS Quick User Guide Search page (details on page 2) The News page: Access the latest news

Shoubridge, Eric

223

Cold quark matter, quadratic corrections, and gauge/string duality  

Science Conference Proceedings (OSTI)

We make an estimate of the quadratic correction in the pressure of cold quark matter using gauge/string duality.

Andreev, Oleg [Arnold Sommerfeld Center for Theoretical Physics, LMU-Muenchen, Theresienstrasse 37, 80333 Muenchen (Germany)

2010-04-15T23:59:59.000Z

224

Optimization Online - "Block-Iterative and String-Averaging ...  

E-Print Network (OSTI)

Jul 19, 2009 ... Optimization Online. "Block-Iterative and String-Averaging Projection Algorithms in Proton Computed Tomography Image Reconstruction".

225

Cosmic string collision in cosmological backgrounds  

SciTech Connect

The collisions of cosmic string loops and the dynamics of junction formations in expanding backgrounds are studied. The key parameter controlling the dynamics of junction formation, the cosmic strings zipping and unzipping, is the relative size of the loops compared to the Hubble radius at the time of collision. We study analytically and numerically these processes for large superhorizon size loops, for small subhorizon size loops as well as for loops with the radii comparable to the Hubble radius at the time of collision.

Firouzjahi, Hassan [School of Physics, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Khoeini-Moghaddam, Salomeh [School of Physics, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Department of Physics, Faculty of Science, Tarbiat Mo'allem University, Tehran (Iran, Islamic Republic of); Khosravi, Shahram [Department of Physics, Faculty of Science, Tarbiat Mo'allem University, Tehran (Iran, Islamic Republic of); School of Astronomy, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of)

2010-06-15T23:59:59.000Z

226

Instantons from Low Energy String Actions  

E-Print Network (OSTI)

We look for instanton solutions in a class of two scalar field gravity models, which includes the low energy string action in four dimensions. In models where the matter field has a potential with a false vacuum, we find that non-singular instantons exist as long as the Dilaton field found in string theory has a potential with a minimum, and provide an example of such an instanton. The class of singular instanton solutions are also examined, and we find that depending on the parameter values, the volume factor of the Euclidean region does not always vanish fast enough at the singularity to make the action finite.

Saffin, P M; Copeland, E J; Mazumdar, Anupam

1998-01-01T23:59:59.000Z

227

String in Horava-Lifshitz gravity  

Science Conference Proceedings (OSTI)

We generalize recent analysis of the dynamics of point particle in Horava-Lifshitz background to the case of string probe when we replace the Hamiltonian constraint of the Polyakov string with the constraint that breaks Lorentz invariance of target space-time. Then, we find corresponding Lagrangian and argue that the world sheet theory is invariant under foliation-preserving diffeomorphism. Finally, we discuss the Hamiltonian dynamics and show that this is well defined on condition that the world sheet lapse function obeys the projectability condition.

Kluson, J. [Faculty of Science, Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlarska 2, 611 37 Brno (Czech Republic)

2010-10-15T23:59:59.000Z

228

Integrable Scalar Cosmologies I. Foundations and links with String Theory  

E-Print Network (OSTI)

We build a number of integrable one--scalar spatially flat cosmologies, which play a natural role in inflationary scenarios, examine their behavior in several cases and draw from them some general lessons on this type of systems, whose potentials involve combinations of exponential functions, and on similar non--integrable ones. These include the need for the scalar to emerge from the initial singularity while climbing up sufficiently steep exponential potentials ("climbing phenomenon") and the inevitable collapse in a big Crunch whenever the scalar tries to settle at negative extrema of the potential. We also elaborate on the links between these types of potentials and "brane supersymmetry breaking", a mechanism that ties together string scale and scale of supersymmetry breaking in a class of orientifold models. We show that, under some assumptions that are spelled out in the text, the extended objects of these vacua can inject inflationary phases with discrete values of the spectral index that are determined by the number of unwrapped dimensions of the branes and by the inverse power with which the string coupling $g_s$ enters their world--volume actions. An NS fivebrane, which is interestingly unstable in this class of models, when wrapped on a small internal cycle would yield a spectral index that is amusingly close to the experimentally favored PLANCK value ns ~ 0.96.

P. Fré; A. Sagnotti; A. S. Sorin

2013-07-07T23:59:59.000Z

229

Form:CBECS Building Type | Open Energy Information  

Open Energy Info (EERE)

CBECS Building Type Jump to: navigation, search This is the 'CBECS Building Type' form. To add a page with this form, enter the page name below; if a page with that name already...

230

Introduction to string theory and conformal field theory  

Science Conference Proceedings (OSTI)

A concise survey of noncritical string theory and two-dimensional conformal field theory is presented. A detailed derivation of a conformal anomaly and the definition and general properties of conformal field theory are given. Minimal string theory, which is a special version of the theory, is considered. Expressions for the string susceptibility and gravitational dimensions are derived.

Belavin, A. A., E-mail: belavin@itp.ac.ru; Tarnopolsky, G. M., E-mail: Hetzif@yandex.r [Russian Academy of Sciences, Landau Institute for Theoretical Physics (Russian Federation)

2010-05-15T23:59:59.000Z

231

Property:File/MimeType | Open Energy Information  

Open Energy Info (EERE)

MimeType Jump to: navigation, search Property Name FileMimeType Property Type String Description MIME Type of the original file. Retrieved from "http:en.openei.orgw...

232

Create Page | Open Energy Information  

Open Energy Info (EERE)

Page Page Jump to: navigation, search Search First, try using the search feature to see if the page or topic already exists. If so, feel free to add to or edit that page using the Edit or Edit With Form button at the top of the page. If your topic does not already have a home, come back here for assistance with the creation of your new wiki page. Search Create There are several ways to create a new wiki page. Choose one of the options below to get started: Contribute - Select one of several easy-to-use forms related to some of the most popular OpenEI topics. Create - Don't see a button for your topic, or want to create your own wiki page from scratch? Enter your desired page name below. If the page already exists you can edit it, if not you'll see a blank edit form.

233

D-branes and string field theory  

E-Print Network (OSTI)

In this thesis we study the D-brane physics in the context of Witten's cubic string field theory. We compute first few terms the low energy effective action for the non-abelian gauge field A, from Witten's action. We show ...

Sigalov, Ilya

2006-01-01T23:59:59.000Z

234

The Structure of Cosmic String Wakes  

E-Print Network (OSTI)

The clustering of baryons and cold dark matter induced by a single moving string is analyzed numerically making use of a new three-dimensional Eulerian cosmological hydro code$^{1)}$ which is based on the PPM method to track the baryons and the PIC method to evolve the dark matter particles. A long straight string moving with a speed comparable to $c$ induces a planar overdensity (a``wake"). Since the initial perturbation is a velocity kick towards the plane behind the string and there is no initial Newtonian gravitational line source, the baryons are trapped in the center of the wake, leading to an enhanced baryon to dark matter ratio. The cold coherent flow leads to very low post--shock temperatures of the baryonic fluid. In contrast, long strings with a lot of small-scale structure (which can be described by adding a Newtonian gravitational line source) move slowly and form filamentary objects. The large central pressure due to the gravitational potential causes the baryons to be expelled from the central regions and leads to a relative deficit in the baryon to dark matter ratio. In this case, the velocity of the baryons is larger, leading to high post-shock temperatures.

A. Sornborger; R. Brandenberger; B. Fryxell; K. Olson

1996-08-05T23:59:59.000Z

235

From Quantum Mechanics to String Theory  

E-Print Network (OSTI)

From Quantum Mechanics to String Theory Relativity (why it makes sense) Quantum mechanics) New Particles anti-particles (combining special relativity and quantum mechanics pions (mediator mechanics, implies an infinite tower of negative energy states, rather than a ground state suppose

236

From Quantum Mechanics to String Theory  

E-Print Network (OSTI)

From Quantum Mechanics to String Theory Relativity (why it makes sense) Quantum mechanics, 2009 #12;Quantum Mechanics: Measurement and Uncertainty Thursday, May 7, 2009 #12;Puzzle: The Stern it. Quantum mechanics understanding: the particle exists in a state without definite position

237

String theory and the real world  

Science Conference Proceedings (OSTI)

We live in exciting times for particle physics. The Large Hadron Collider (LHC) at CERN has begun to collect data, and laboratory and satellite experiments are investigating the dark matter of the universe. Another, less appreciated fact increases the excitement. Physicists now have a coherent, consistent theoretical framework to address basic questions about particles, the interactions and forces between them, why they are what they are, and how numerous phenomena are related in a broader picture. That framework is ''string theory''. I put the term in scare quotes because there is not yet a final formulation of the theory. But the lack of a finished picture is not important for my purposes, so in this article I refer to the framework as string theory or M-theory. The perspective that string theory is the underlying framework to address many issues facing particle physics and cosmology is different from the more standard description of it as a consistent quantum theory of gravity. But it is a fruitful way to think about what string theory means.

Kane, Gordon [University of Michigan, Ann Arbor (United States)

2010-11-15T23:59:59.000Z

238

The cohomology structure of string algebras.  

E-Print Network (OSTI)

We show that the graded commutative ring structure of the Hochschild cohomology HH*(A) is trivial in case A is a triangular quadratic string algebra. Moreover, in case A isgentle, the Lie algebra structure on HH*(A) is also trivial.

Juan Carlos Bustamante

239

Black Holes and Solitons in String Theory  

E-Print Network (OSTI)

In this review, I discuss a general method for constructing classical solutions of the equations of motion arising in the effective low energy string theory, and discuss specific applications of this method. (Based on talks given at the Johns Hopkins Workshop held at Goteborg, June 8-10, 1992, and ICTP Summer Workshop held at Trieste, July 2-3, 1992)

Sen, A

1992-01-01T23:59:59.000Z

240

Towards Dark Energy from String-Theory  

E-Print Network (OSTI)

We discuss vacuum energy in string and M-theory with a focus on heterotic M-theory. In the latter theory a mechanism is described for maintaining zero vacuum energy after supersymmetry breaking. Higher-order corrections can be expected to give a sufficiently small amount of vacuum energy to possibly account for dark energy.

Axel Krause

2007-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "type string pages" 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

Computer simulations of the motion and decay of global strings  

Science Conference Proceedings (OSTI)

Computer simulations have been carried out of the motion and decay of global strings, including spectrum analysis of the energy stored in the scalar field which describes the global string and the radiated Nambu-Goldstone bosons. We simulated relaxing pieces of bent string and collapsing loops. We find, for the string sizes investigated, that the spectrum of field energy hardens rather than softens while the string decays into Nambu-Goldstone radiation. We argue on theoretical grounds that is indeed the most plausible general behaviour. 19 refs., 12 figs.

Hagmann, C.; Sikivie, P.

1990-01-01T23:59:59.000Z

242

Destruction of a metastable string by particle collisions  

Science Conference Proceedings (OSTI)

We calculate the probability of destruction of a metastable string by collisions of the Goldstone bosons, corresponding to the transverse waves on the string. We find a general formula that allows to determine the probability of the string breakup by a collision of arbitrary number of the bosons. We find that the destruction of a metastable string takes place only in collisions of even number of the bosons, and we explicitly calculate the energy dependence of such process in a two-particle collision for an arbitrary relation between the energy and the largest infrared scale in the problem, the length of the critical gap in the string.

Monin, A. K. [University of Minnesota, School of Physics and Astronomy (United States); Voloshin, M. B., E-mail: voloshin@umn.ed [University of Minnesota, William I. Fine Theoretical Physics Institute (United States)

2010-04-15T23:59:59.000Z

243

Cosmic Strings in the Universe: Achievements and prospects of research  

Science Conference Proceedings (OSTI)

Cosmic strings are linear structures of cosmological scales whose search has been actively conducted in recent years. Progress in constructing theoretical models and investigating the properties of cosmic strings and a significant growth of observational resources provide extensive possibilities for the search of such objects by several independent observational methods. These methods include searching for the events of gravitational lensing of distant background sources by strings and searching for the distinctive cosmic micro-wave background anisotropy structures induced by strings. We discuss these techniques and propose the methods of searching for strings oriented toward the latest spacecraft, including the Planck project.

Sazhina, O. S., E-mail: tedeshka@mail.ru; Sazhin, M. V., E-mail: moimaitre@mail.ru [Sternberg Astronomical Institute (Russian Federation)

2011-11-15T23:59:59.000Z

244

Physics research and technology developments of electron string ion sources  

Science Conference Proceedings (OSTI)

The most recent experimental information on electron string phenomenon, such as two step transition to electron string state, stability of e-strings in condition of electron energy recuperation, are described. The new technology developments of electron string ion sources (ESIS) include pulse injection of gaseous species in e-string and its efficient conversion to ion beams, slow ion extraction, ion-ion cooling of heavy ions with CH{sub 4} coolant, and a progress in the construction of the new Joint Institute for Nuclear Research ESIS with 6 T solenoid are briefly considered.

Donets, D. E.; Donets, E. E.; Ramzdorf, A. Yu.; Salnikov, V. V.; Shutov, V. B.; Donets, E. D. [Veksler and Baldin Laboratory of High Energy Physics, Joint Institute for Nuclear Research, Dubna 141980 (Russian Federation); Honma, T.; Noda, K. [National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba, 263-8555 (Japan)

2012-02-15T23:59:59.000Z

245

Kaluza-Klein and Gauss-Bonnet cosmic strings  

E-Print Network (OSTI)

We make a systematic investigation of stationary cylindrically symmetric solutions to the five-dimensional Einstein and Einstein-Gauss-Bonnet equations. Apart from the five-dimensional neutral cosmic string metric, we find two new exact solutions which qualify as cosmic strings, one corresponding to an electrically charged cosmic string, the other to an extended superconducting cosmic string surrounding a charged core. In both cases, test particles are deflected away from the singular line source. We extend both kinds of solutions to exact multi-cosmic string solutions.

Mustapha Azreg-Ainou; Gérard Clément

1996-03-29T23:59:59.000Z

246

Bosonic (meta)stabilization of cosmic string loops  

E-Print Network (OSTI)

We consider the possibility of a bosonic (meta)stabilization of a cosmic gauge string loop due to the presence of a gas of low mass bosonic particles which become trapped within the string core. This boson gas exerts a pressure which tends to counteract the string tension, allowing a circular string loop to find a finite equilibrium radius, provided that gas particles do not escape the string core. However, high energy bosons do escape, and consequently the loop shrinks and the temperature rises. Estimates indicate that the bosonic stabilization mechanism is ineffective, and the loop is unstable against decay.

J. R. Morris

2013-03-08T23:59:59.000Z

247

Aprun MAN Page  

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

aprun » Aprun MAN Page aprun » Aprun MAN Page Aprun MAN Page aprun [-a arch ] [-b ] [-B] [-cc cpu_list | keyword ] [-cp cpu_placement_file_name ] [-d depth ] [-D value ] [-L node_list ] [-m size[h|hs] ] [-n pes ] [-N pes_per_node ][-F access mode ] [-q ] [-r cores][-S pes_per_numa_node ] [-sl list_of_numa_nodes ] [-sn numa_nodes_per_node ] [-ss ] [-T ] [-t sec ] executable [ arguments_for_executable ] IMPLEMENTATION Cray Linux Environment (CLE) DESCRIPTION To run an application on CNL compute nodes, use the Application Level Placement Scheduler (ALPS) aprun command. The aprun command specifies application resource requirements, requests application placement, and initiates application launch. The aprun utility provides user identity and environment information as part of the application launch so that your login node session can

248

Energy Links Page - EIA  

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

Publications & Reports > Energy Links Page Publications & Reports > Energy Links Page Related Energy Links Energy Companies Coal & Other Electricity Foreign Integrated Natural Gas Transmission, Distribution, and Marketing News Services and Periodicals Oil & Gas Exploration and Production Petroleum Refining, Marketing, and Transportation State Owned U.S. Integrated Government Agencies Other DOE National Laboratories Federal Energy States Universities Trade Associations & Other Trade Associations Other Associations International Statistics Energy Services Other Energy Sites EIA Links Disclaimer These pages contain hypertext links to information created and maintained by other public and private organizations. These links provide additional information that may be useful or interesting and are being provided consistent with the intended purpose of the EIA Web site. EIA does not control or guarantee the accuracy, relevance, timeliness, or completeness of this outside information. EIA does not endorse the organizations sponsoring linked websites and we do not endorse the views they express or the products/services they offer.

249

Main Page - NWChem  

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

Log in / create account Log in / create account Search Go Search Navigation Main page Science Benchmarks Download Code Documentation News Community Developers SEARCH TOOLBOX LANGUAGES Forum Menu Page Discussion View source History modified on 17 May 2013 at 21:51 *** 6,254,554 views Main Page From NWChem Jump to: navigation, search NWChem: Delivering High-Performance Computational Chemistry caption NWChem aims to provide its users with computational chemistry tools that are scalable both in their ability to treat large scientific computational chemistry problems efficiently, and in their use of available parallel computing resources from high-performance parallel supercomputers to conventional workstation clusters. NWChem software can handle Biomolecules, nanostructures, and solid-state From quantum to classical, and all combinations

250

On Demand Paging Using  

E-Print Network (OSTI)

The power consumption of the network interface plays a major role in determining the total operating lifetime of wireless handheld devices. On demand paging has been proposed earlier to reduce power consumption in cellular networks. In this scheme, a low power secondary radio is used to wake up the higher power radio, allowing the latter to sleep or remain off for longer periods of time. In this paper we present use of Bluetooth radios to serve as a paging channel for the 802.11 wireless LAN. We have implemented an on-demand paging scheme on a WLAN consisting of iPAQ PDAs equipped with Bluetooth radios and Cisco Aironet wireless networking cards. Our results show power saving ranging from 19% to 46% over the present 802.11b standard operating modes with negligible impact on performance.

Bluetooth Radios On; Yuvraj Agarwal; Rajesh K. Gupta

2003-01-01T23:59:59.000Z

251

Property:NEPA Application Type | Open Energy Information  

Open Energy Info (EERE)

NEPA Application Type NEPA Application Type Property Type String Allows Values NOI;GPD;POO;POU;POD;ROW;Sundry Notice Pages using the property "NEPA Application Type" Showing 25 pages using this property. (previous 25) (next 25) B BLM-NV-WN-ES-08-01-1310, NV-020-08-01 + POO +, POU +, POD +, ... C CA-017-05-051 + GPD +, ROW + CA-170-02-15 + GPD + CA-670-2010-107 + GPD + CA-670-2010-CX + NOI + CA-96062042 + POU + D DOE-EA-1733 + POU + DOE-EIS-0298 + NOI + DOI-BLM-CA-ES-2013-002+1793-EIS + POO +, POU +, POD + DOI-BLM-ID-220-2009-EA-3709 + GPD + DOI-BLM-ID-B010-2010-0083-CX + ROW + DOI-BLM-NM-L000-2012-0020-DNA + Sundry Notice + DOI-BLM-NM-L000-2012-0042-DNA + Sundry Notice + DOI-BLM-NM-L000-2012-0111-DNA + GPD + DOI-BLM-NM-L000-2012-0200-DNA + GPD + DOI-BLM-NV-063-EA08-091 + GPD +, POO +, POU +

252

Have You Used LED Light Strings? | Department of Energy  

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

LED Light Strings? LED Light Strings? Have You Used LED Light Strings? December 3, 2009 - 7:30am Addthis This week, you read about LED holiday light strings, which can use 90% less energy than regular incandescent light strings. You may even be able to save on the initial costs with rebates from stores or your utility; check to find out what's being offered in your area. Have you used LED light strings? Tell us what you think of them. 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. Addthis Related Articles Save Money with LED Holiday Light Strings Tips to Save Energy During the Holidays Choosing Energy-Saving Lighting Products Saves You Money

253

21 briefing pages total  

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

briefing pages total p. 1 briefing pages total p. 1 Reservist Differential Briefing U.S. Office of Personnel Management December 11, 2009 p. 2 Agenda - Introduction of Speakers - Background - References/Tools - Overview of Reservist Differential Authority - Qualifying Active Duty Service and Military Orders - Understanding Military Leave and Earnings Statements p. 3 Background 5 U.S.C. 5538 (Section 751 of the Omnibus Appropriations Act, 2009, March 11, 2009) (Public Law 111-8) Law requires OPM to consult with DOD Law effective first day of first pay period on or after March 11, 2009 (March 15 for most executive branch employees) Number of affected employees unclear p. 4 Next Steps

254

Question for SU(5) x SU(5) string unification  

E-Print Network (OSTI)

The heterotic string theory can embeds the crossed SU(5) x SU(5) gauge group. Here we investigate the string unification in this framework and the concerning problems. We show generically that only a very constrained parameter space is allowed for new particles, mostly due to the gauge coupling constant $\\alpha_1^{-1}$. One possible but unfavorable solution is given by the introduction of three fermion generations of SU(5)_L-adjoint representation. Only the low-scale decompositions of SU(5)_L with vanishing hypercharge, $\\Sigma_3\\sim(1,3)_0$ and $\\Sigma_8\\sim(8,1)_0$, of fermionic and bosonic types can be included to circumvent the problem. The triplets must live in TeV region and could be accessible at colliders. We also show that non-supersymmetric scenario is exclusively compatible with the introduction of additional color-SU(2)_L-triplet field while supersymmetry is solely possible at high-energy scale. All these intermediated thresholds are easily incorporated into the called Adjoint SU(5) schemes.

Edison T. Franco

2011-04-14T23:59:59.000Z

255

Question for SU(5) x SU(5) string unification  

E-Print Network (OSTI)

The heterotic string theory can embeds the crossed SU(5) x SU(5) gauge group. Here we investigate the string unification in this framework and the concerning problems. We show generically that only a very constrained parameter space is allowed for new particles, mostly due to the gauge coupling constant $\\alpha_1^{-1}$. One possible but unfavorable solution is given by the introduction of three fermion generations of SU(5)_L-adjoint representation. Only the low-scale decompositions of SU(5)_L with vanishing hypercharge, $\\Sigma_3\\sim(1,3)_0$ and $\\Sigma_8\\sim(8,1)_0$, of fermionic and bosonic types can be included to circumvent the problem. The triplets must live in TeV region and could be accessible at colliders. We also show that non-supersymmetric scenario is exclusively compatible with the introduction of additional color-SU(2)_L-triplet field while supersymmetry is solely possible at high-energy scale. All these intermediated thresholds are easily incorporated into the called Adjoint SU(5) schemes.

Franco, Edison T

2011-01-01T23:59:59.000Z

256

Towards a quantum field theory of primitive string fields  

Science Conference Proceedings (OSTI)

We denote generating functions of massless even higher-spin fields 'primitive string fields' (PSF's). In an introduction we present the necessary definitions and derive propagators and currents of these PDF's on flat space. Their off-shell cubic interaction can be derived after all off-shell cubic interactions of triplets of higher-spin fields have become known. Then we discuss four-point functions of any quartet of PSF's. In subsequent sections we exploit the fact that higher-spin field theories in AdS{sub d+1} are determined by AdS/CFT correspondence from universality classes of critical systems in d-dimensional flat spaces. The O(N) invariant sectors of the O(N) vector models for 1 {=} 4, they are distinguished by their anomalous dimensions (in CFT{sub 3}) or by theirmass (in AdS{sub 4}). We sum over these multiplets and the spins to obtain 'string type fields', one for each such monomial.

Ruehl, W., E-mail: wue_ruehl@t-online.de [Technical University of Kaiserslautern, Department of Physics (Germany)

2012-10-15T23:59:59.000Z

257

May 2009 Page 1 Google General Searching  

E-Print Network (OSTI)

more to open Alerts. Type or copy search terms (use keywords or any of these tips) and set options domain such as .gov, .edu, or from a specific website, e.g., on the Adv Search form, enter cdc.gov or useTips May 2009 Page 1 Google ­ General Searching Tip #1: Phrase: Use quotation marks to keep words

California at San Diego, University of

258

Smooth crossover transition from the {delta}-string to the Y-string three-quark potential  

Science Conference Proceedings (OSTI)

We comment on the assertion made by Caselle et al.[M. Caselle, G. Delfino, P. Grinza, O. Jahn, and N. Magnoli, J. Stat. Mech. (2006) P008.] that the confining (string) potential for three quarks 'makes a smooth crossover transition from the {delta}-string to the Y-string configuration at interquark distances of around 0.8 fm'. We study the functional dependence of the three-quark confining potentials due to a Y-string, and the {delta} string and show that they have different symmetries, which lead to different constants of the motion (i.e. they belong to different 'universality classes' in the parlance of the theory of phase transitions). This means that there is no 'smooth crossover' between the two, when their string tensions are identical, except at the vanishing hyper-radius. We also comment on a certain two-body potential approximation to the Y-string potential.

Dmitrasinovic, V.; Sato, Toru; Suvakov, Milovan [Vinca Institute of Nuclear Sciences, lab 010, P.O. Box 522, 11001 Beograd (Serbia); Department of Physics, Graduate School of Science, Osaka University, Toyonaka 560-0043 (Japan); Institute of Physics, Pregrevica 118, Zemun, P.O. Box 57, 11080 Beograd (Serbia)

2009-09-01T23:59:59.000Z

259

Help:Starting a new page | Open Energy Information  

Open Energy Info (EERE)

Starting a new page Starting a new page Jump to: navigation, search An example of how to add a company to the Solar Gateway There are several ways to start a new page. These can vary based on the type of page started, as well as the wiki and namespace. The first thing you should do is know which topic area your page falls under. OpenEI has several gateways around specific topics, such as Solar, Wind, and Geothermal. In these Gateways, you'll immediately see forms for adding content. Forms were created to standardize the information you put in, and make it fast and easy to get your content published on OpenEI. For example, in the Solar Gateway, you'll see a map of Solar Energy companies, under which you can add a new company that will add a new page and populate the map. Companies, like many other categories of information

260

Synchrophasor Technologies Page ii  

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

August 2013 August 2013 Synchrophasor Technologies Page ii Table of Contents 1. Introduction ................................................................................................................... 1 2. Synchrophasor Technologies .......................................................................................... 1 3. Advanced Applications Software and their Benefits ........................................................ 4 3.1 Online (Near Real-Time Applications) ........................................................................... 5 3.2 Offline (Not real-time) Applications ............................................................................. 8 4. Recovery Act Synchrophasor Projects ............................................................................. 8

Note: This page contains sample records for the topic "type string pages" 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

CHAPTER CONTENTS Section Page  

E-Print Network (OSTI)

CHAPTER CONTENTS Section Page 13.1 Wooded Wetland Monitoring 13.1-1 13.2 Landfill Soils Gas Left Blank #12;Data Quality Objectives ­ Landfill Gas and Surface Leachate Monitoring Environmental Surveillance X Restoration #12;Data Quality Objectives - Landfill Gas and Surface Leachate Monitoring 13

Homes, Christopher C.

262

EERE: Clean Cities Home Page  

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

Cities Printable Version Share this resource Send a link to EERE: Clean Cities Home Page to someone by E-mail Share EERE: Clean Cities Home Page on Facebook Tweet about EERE: Clean...

263

On Water, Steam and String Theory  

E-Print Network (OSTI)

This is a colloquium-style review lecture for physicists and non-physicists, as part of the requirements for ``Habilitation'' at the university of Bern: At a pressure of 220 atm. and a temperature of 374 Celsius there is a second-order phase transition between water and steam. Understanding it requires the concept of the renormalization group. Images from computer simulations of the lattice gas model (included) are used to explain its basic ideas. It is briefly reviewed how the renormalization group is used to compute critical coefficients for the water-steam phase transition, in good agreement with experiment. Applications in particle physics and string theory are mentioned. The appendix contains a sample of the author's results on renormalization group flows in theories with dynamical gravity and their relation to perturbative string theory: gravity modifies critical coefficients and phase diagrams, in agreement with numerical calculations, and leads to curious phenomena such as oscillating flows and quantum mechanical flows.

Christof Schmidhuber

1997-01-22T23:59:59.000Z

264

On Water, Steam and String Theory  

E-Print Network (OSTI)

This is a colloquium-style review lecture for physicists and non-physicists, as part of the requirements for ``Habilitation'' at the university of Bern: At a pressure of 220 atm. and a temperature of 374 Celsius there is a second-order phase transition between water and steam. Understanding it requires the concept of the renormalization group. Images from computer simulations of the lattice gas model (included) are used to explain its basic ideas. It is briefly reviewed how the renormalization group is used to compute critical coefficients for the water-steam phase transition, in good agreement with experiment. Applications in particle physics and string theory are mentioned. The appendix contains a sample of the author's results on renormalization group flows in theories with dynamical gravity and their relation to perturbative string theory: gravity modifies critical coefficients and phase diagrams, in agreement with numerical calculations, and leads to curious phenomena such as oscillating flows and quantu...

Schmidhuber, C

1997-01-01T23:59:59.000Z

265

Jon Borwein's Home Page - CECM  

E-Print Network (OSTI)

Math Research Group. CECM - our Centre. a SunTREC site. Pacific Institute. Jonathan Borwein's Personal Page. Medical Images ...

266

String orientations of simplicial homology manifolds  

E-Print Network (OSTI)

Simplicial homology manifolds are proposed as an interesting class of geometric objects, more general than topological manifolds but still quite tractable, in which questions about the microstructure of space-time can be naturally formulated. Their string orientations are classified by $H^3$ with coefficients in an extension of the usual group of D-brane charges, by cobordism classes of homology three-spheres with trivial Rokhlin invariant.

Jack Morava

2008-07-11T23:59:59.000Z

267

Thermodynamic potential for compactified bosonic strings  

E-Print Network (OSTI)

We discuss the inclusion of chemical potentials of the Kaluza-Klein charges in the partition function of the bosonic string with a compactified dimension on a circle. The construction of the thermodynamic potential is achieved by the path integral method at one-loop level. Duality symmetry in the dependence on compactification scale is examined. A modular-invariant expression for the thermodynamic potential is also presented.

Kiyoshi Shiraishi

2013-08-06T23:59:59.000Z

268

THIS PAGE INTENTIONALLY LEFT BLANK  

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

THIS PAGE INTENTIONALLY LEFT BLANK THIS PAGE INTENTIONALLY LEFT BLANK i U.S. DEPARTMENT OF ENERGY CRITICAL MATERIALS STRATEGY DECEMBER 2011 ii THIS PAGE INTENTIONALLY LEFT BLANK iii TABLE OF CONTENTS FOREWORD ........................................................................................................................................................... 1 ACKNOWLEDGEMENTS .......................................................................................................................................... 2 EXECUTIVE SUMMARY ........................................................................................................................................... 3 CHAPTER 1. INTRODUCTION .................................................................................................................................. 8

269

Dark Energy in Perturbative String Cosmology  

E-Print Network (OSTI)

The apparent observation of dark energy poses problems for string theory. In de Sitter space, or in quintessence models, one cannot define a gauge-invariant S-matrix. We argue that eternal quintessence does not arise in weakly coupled string theory, but point out that it is difficult to define an $S$-matrix even in the presence of perturbative potentials for the moduli. The solutions of the Fischler-Susskind equations all have Big Bang or Big Crunch Singularities. We believe that an S-matrix (or S-vector) exists in this context but cannot be calculated by purely perturbative methods. We study the possibility of metastable de Sitter vacua in such weakly coupled scenarios, and conclude that the S-matrix of the extreme weak coupling region cannot probe de Sitter physics. We also consider proposed explanations of the dark energy from the perspective of string theory, and find that most are implausible. We note that it is possible that the axion constitutes both the dark matter and the dark energy.

Tom Banks; Michael Dine

2001-06-28T23:59:59.000Z

270

WIPP Home Page header  

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

| News & Information | Document Center | Transportation | Opportunities | Contacts | Links | Search | News & Information | Document Center | Transportation | Opportunities | Contacts | Links | Search WWIS Public Inquiry Page Welcome to the WWIS Public Inquiry Page. This service is established in accordance an Agreement between the United States Department of Energy and the New Mexico Environment Department, dated February 11, 2005, Docket Number HWB 04-07 (CO). This service provides a replicate of information stored on the WIPP Waste Information System. Container Data will be available 14 days after emplacement in the WIPP Repository. The last update was Saturday, January 11, 2014 1:17:12 AM . You can find instructions for using this service by selecting the "Instructions" option. Information is available for disposed containers of transuranic (TRU) waste.

271

Activity Six, Student Page  

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

Six -- Observing Magnetic Effects on Particle Beams (Student Page) Six -- Observing Magnetic Effects on Particle Beams (Student Page) An ordinary oscilloscope and two small bar magnets can enable you to see two of the important ways in which particle beams are controlled in accelerators. There is an electron beam in the oscilloscope that moves in a nearly straight line from back to front, as a result of a potential difference of tens of thousands of volts. To show how a magnetic field can deflect a beam of charged particles, set an oscilloscope to produce a well-focused spot near the center of the screen. Position the north pole of one bar magnet directly above the beam of the oscilloscope, and position the south pole of another magnet directly below the beam as shown here. (Be careful to avoid bumping or scratching the screen with the magnets.)

272

Page1of3  

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

Page1of3 Page1of3 .EF.!. . .. Ul l u .s. DEPARTl\IffiNT OF ENERG i'Cy .,..- - - - - - EERE PROJECT MANAGEMENT CENTER NEPA DETERl\fiNATION RECIPIENT:City of Houston PROJECT TITLE : EECBG Program - City of Houston , TX STATE: TX Funding Opportunity Announcement Numbt'r PrO(uumtnt Instrument Number NEPA Control Number CID Number DE-FOZ-OOOOO13 DE-EEOOOO965 GFO -()()()()965-()1 G0965 Based on my review o(the infonnation concerning the propostd adion, as NEPA Compliance Officer (authoriud under DOE Order 451.IA), I have made the following determination: ex, EA, EIS APPENDIX AND NUMBER: Description: 85.1 (a) Actions to conserve energy or water, demoostrate potential energy Of water conservatioo, and promote energy A ctions to efficiency that 'NOU1d not have the potentlal to cause significant changes in the Indoor Of outdoor coocentratJons of

273

Activity Three, Student Page  

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

Three -- Rutherford's Discovery (Student Page) Three -- Rutherford's Discovery (Student Page) In this activity, you and your team members will use the methods pioneered by Ernest Rutherford in the early 1900s and still used by particle physicists in their accelerator experiments today. These methods enable scientists to identify the characteristics of particles that they cannot actually see. You will learn how precise your measurements must be when you can't see what you are studying. On your team's experiment table there is a large wooden board, under which your teacher has placed a flat shape. Your team's job is to identify the shape without ever seeing it. You can only roll marbles against the hidden object and observe the deflected paths that the marbles take. Your team will have five minutes to "observe" a

274

CMB Anisotropy Induced by a Moving Straight Cosmic String  

E-Print Network (OSTI)

We showed that the part of strings could be detected by optical method is only 20% from the total available amount of such objects, therefore the gravitational lensing method has to be "completed" by CMB one. We found the general structure of the CMB anisotropy generated by a cosmic string for simple model of straight string moving with constant velocity. For strings with deficit angle 1-2 arcsec the amplitude of generated anisotropy has to be 15-30 muK (the corresponding string linear density is (G mu) ~ 10^{-7} and energy is GUT one, 10^{15} GeV). To use both radio and optical methods the deficit angle has to be from 0.1 arcsec to 5-6 arcsec. If cosmic string can be detected by optical method, the length of corresponding brightness spot of anisotropy has to be no less than 100 degrees.

O. S. Sazhina; M. V. Sazhin; V. N. Sementsov; M. Capaccioli; G. Longo; G. Riccio; G. D'Angelo

2008-09-05T23:59:59.000Z

275

Page, Arizona: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Page, Arizona: Energy Resources Page, Arizona: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 36.9147222°, -111.4558333° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":36.9147222,"lon":-111.4558333,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

276

Page 1 of 2  

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

The purpose of this memorandum is to revise the discretionary set-aside authority addressed on The purpose of this memorandum is to revise the discretionary set-aside authority addressed on Page 13 of Acquisition Letter 2004-03 from SSO,(XX) to SIOO,(XX). Questions may be addressed to Steve Zvolensky at (202) 287-1307 or St~hen.zvolensk~@hg.doe.£ov Attachment cc: PP AG Members ;k..t ./ /!k~ --'"' Michael P. Fischetti Acting Director Office of Procurement and Assistance Policy Michael Acting I Office 0 Page 2 of 2 MEMORANDUM FOR DISTRIBUTION 6tfJ FROM: RICHARD H. HOPF, DIRECT~ OFFICE OF PROCUREMENT AND ASSIST ANCE ~ Discretionary Set-Aside A:tho} SUBJECT: The purpose of this memorandum is to revise the discretionary set-aside authority addressed on Page 13 of Acquisition Letter 2004-03 from $50,000 to $100,000. The paragraph entitled, Discretionary Set-Asides, is revised to read:

277

Bidirectional Search in a String with Wavelet Trees Thomas Schnattinger  

E-Print Network (OSTI)

Bidirectional Search in a String with Wavelet Trees #12;Wavelet Tree of T = BWT(S) = nle_pl$nnlleee_eaae T[1 Bidirectional Search in a String with Wavelet Trees #12;Wavelet Tree of T = BWT(S) = nle_pl$nnlleee_eaae T[1 Bidirectional Search in a String with Wavelet Trees #12;Wavelet Tree of T = BWT(S) = nle_pl$nnlleee_eaae T[1

Lonardi, Stefano

278

Qualification of a computer program for drill string dynamics  

DOE Green Energy (OSTI)

A four point plan for the qualification of the GEODYN drill string dynamics computer program is described. The qualification plan investigates both modal response and transient response of a short drill string subjected to simulated cutting loads applied through a polycrystalline diamond compact (PDC) bit. The experimentally based qualification shows that the analytical techniques included in Phase 1 GEODYN correctly simulate the dynamic response of the bit-drill string system. 6 refs., 8 figs.

Stone, C.M.; Carne, T.G.; Caskey, B.C.

1985-01-01T23:59:59.000Z

279

Fine structure constant in the spacetime of a cosmic string  

E-Print Network (OSTI)

We calculate the fine structure constant in the spacetime of a cosmic string. In the presence of a cosmic string the value of the fine structure constant reduces. We also discuss on numerical results. The gravitational properties of cosmic strings are strikingly different from those of non-relativistic linear distributions of matter. To explain the origin of the difference, we note that for a static matter distribution with energymomentum tensor, T µ ? = diag (?, ?p1, ?p2, ?p3) , (1) the Newtonian limit of the Einstein equations become ? 2 ? = 4?G (? + p1 + p2 + p3), (2) where ? is the gravitational potential. For non-relativistic matter, pi ? ? and ? 2 ? = 4?G?. Strings, on the other hand, have a large longitudinal tension. For a straight string parallel to the z-axis, p3 = ??, with p1 and p2 vanish when averaged over the string cross-section. Hence, the righthand side of Eq.(2) vanishes, suggesting that straight strings produce no gravitational forece on surrounding matter. This conclusion is confirmed by a full general-relativistic analysis. Another feature distinguishing cosmic strings from more familiar sources is their relativistic motion. As a result, oscillating loops of string can be strong emitters of gravitational radiation. A gravitating string is described by the combined system of Einstein, Higgs and guage field equations. The problem of solving these coupled equations is formidable and no exact solutions have been found to date. Fortunately, for most cosmological applications the problem can be made tractable by adopting two major simplifications. First, assuming that the string thickness is much smaller than all other relevant dimensions, the string can be 1

Forough Nasseri

2005-01-01T23:59:59.000Z

280

Help:User page | Open Energy Information  

Open Energy Info (EERE)

A user page is a page about a wiki user; someone who registered on the A user page is a page about a wiki user; someone who registered on the wiki, and is (most probably) a contributor. If you have registered, you can create your own user page. Your user page is linked in the top right. More importantly, others will see links to your user page from various places which assist wiki collaboration. This includes the "Recent changes" and "page history" displays (See Help:Tracking changes). You can also link to your user page within text of a wiki page, which is mainly useful on talk pages when you sign your name. Contents 1 What to put on your user page 1.1 User scratchpad / development area 2 Other people's user pages 2.1 User Contributions 2.2 Editing someone else's page 2.3 User talk pages What to put on your user page

Note: This page contains sample records for the topic "type string pages" 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

Hamiltonian extension and eigenfunctions for a time dispersive dissipative string  

E-Print Network (OSTI)

We carry out a detailed analysis of a time dispersive dissipative (TDD) string, using our recently developed conservative and Hamiltonian extensions of TDD systems. This analysis of the TDD string includes, in particular: (i) an explicit construction of its conservative Hamiltonian extension, consisting of the physical string coupled to "hidden strings;" (ii) explicit formulas for energy and momentum densities in the extended system, providing a transparent physical picture accounting precisely for the dispersion and dissipation; (iii) the eigenmodes for the extended string system, which provide an eigenmode expansion for solutions to the TDD wave equation governing the TDD string. In particular, we find that in an eigenmode for the extended system the displacement of the physical string does not satisfy the formal eigenvalue problem, but rather an equation with a source term resulting from the excitation of the hidden strings. The obtained results provide a solid basis for the rigorous treatment of the long standing problem of scattering by a TDD scatterer, illustrated here by the computation of scattering states for a string with dissipation restricted to a half line.

Alexander Figotin; Jeffrey Schenker

2006-03-31T23:59:59.000Z

282

The Color Flux Tube as an Effective String  

Science Conference Proceedings (OSTI)

We investigate the low-energy regime of the confining string connecting color sources in Yang-Mills theory. First, we present results of the Monte Carlo measurement of the width of the flux tube between two static quarks in the fundamental representation both at zero and at finite temperature. Then we consider the confining flux tube connecting color sources in larger representations of the gauge group. For stable string - the k-strings - we study the Luscher term; for unstable strings we investigate their decay as the distance between the static sources is increased.

Pepe, Michele [INFN, Sezione di Milano-Bicocca, Edificio U2, Piazza della Scienza 3, 20126 Milano (Italy)

2011-05-24T23:59:59.000Z

283

On the string topology category of compact Lie groups.  

E-Print Network (OSTI)

This paper examines the string topology category of a manifold, defined by Blumberg, Cohen and Teleman. Since the string topology category is a subcategory of a compactly generated triangulated category, the machinery of stratification, constructed by Benson, Krause and Iyengar, can be applied in order to gain an understanding of the string topology category. It is shown that an appropriate stratification holds when the manifold in question is a simply connected compact Lie group. This last result is used to derive some properties of the relevant string topology categories.

Shoham Shamir

284

World Sheet Commuting beta-gamma CFT and Non-Relativistic String Theories  

E-Print Network (OSTI)

Cosmolog- ical uni?cation of string theories,” arXiv:hep-landscape of supercritical string theory,” arXiv:0705.0980 [invariance, supersymmetry and string theory,” Nucl. Phys.

Kim, Bom Soo

2008-01-01T23:59:59.000Z

285

A New Lorentz Violating Nonlocal Field Theory From String-Theory  

E-Print Network (OSTI)

29] J. Polchinski, “String theory. Vol. 2: SuperstringNonlocal Field Theory From String-Theory Ori J. GanorNonlocal Field Theory From String-Theory Ori J. Ganor ?

Ganor, Ori J.

2009-01-01T23:59:59.000Z

286

Borehole Seismic Monitoring at Otway Using the Naylor-1 Instrument String  

E-Print Network (OSTI)

the Naylor-1 Instrument String April 2009 Thomas M. Daley 1the performance of the seismic string. The moveout of low-the upper section of the string (1420 – 1500 m) but never on

Daley, T.M.

2010-01-01T23:59:59.000Z

287

M-theory through the looking glass: Tachyon condensation in the E8 heterotic string  

E-Print Network (OSTI)

H. Phong, The geometry of string perturbation theory, Rev.solutions of supercritical string theory, hep-th/0611317. [changing exact solutions of string theory, hep-th/0612051. [

Horava, Petr

2008-01-01T23:59:59.000Z

288

String scattering in flat space and a scaling limit of Yang-Mills correlators  

Science Conference Proceedings (OSTI)

We use the flat space limit of the AdS/CFT correspondence to derive a simple relation between the 2{yields}2 scattering amplitude of massless string states in type IIB superstring theory on ten-dimensional Minkowski space and a scaling limit of the N=4 super Yang-Mills four-point functions. We conjecture that this relation holds nonperturbatively and at arbitrarily high energy.

Okuda, Takuya [Perimeter Institute for Theoretical Physics, Waterloo, Ontario, N2L 2Y5 (Canada); Penedones, Joao [Kavli Institute for Theoretical Physics, Santa Barbara, California 93106-4030 (United States)

2011-04-15T23:59:59.000Z

289

Accelerating black hole in 2+1 dimensions and 3+1 black (st)ring  

E-Print Network (OSTI)

A C-metric type solution for general relativity with cosmological constant is presented in 2+1 dimensions. It is interpreted as a three-dimensional black hole accelerated by a strut. Positive values of the cosmological constant are admissible too. Some embeddings of this metric in the 3+1 space-time are considered: accelerating BTZ black string and a black ring where the gravitational force is sustained by the acceleration.

Astorino, Marco

2011-01-01T23:59:59.000Z

290

Property:Buildings/PublicationName | Open Energy Information  

Open Energy Info (EERE)

to: navigation, search This is a property of type String. Pages using the property "BuildingsPublicationName" Showing 2 pages using this property. G General Merchandise 50%...

291

Property:Incentive/ProgBudget | Open Energy Information  

Open Energy Info (EERE)

search Property Name IncentiveProgBudget Property Type String Description Program Budget. Pages using the property "IncentiveProgBudget" Showing 25 pages using this property....

292

String-Inspired Chern-Simons Modified Gravity In 4-Dimensions  

E-Print Network (OSTI)

Chern-Simons modified gravity models in 4-dimensions are shown to be special cases of low energy effective string models to first order in the string constant.

Adak, M

2008-01-01T23:59:59.000Z

293

From Decay to Complete Breaking: Pulling the Strings in SU(2) Yang-Mills Theory  

Science Conference Proceedings (OSTI)

We study (2Q+1) strings connecting two static charges Q in (2+1)D SU(2) Yang-Mills theory. While the fundamental (2) string between two charges Q=(1/2) is unbreakable, the adjoint (3) string connecting two charges Q=1 can break. When a (4) string is stretched beyond a critical length, it decays into a (2) string by gluon pair creation. When a (5) string is stretched, it first decays into a (3) string, which eventually breaks completely. The energy of the screened charges at the ends of a string is well described by a phenomenological constituent gluon model.

Pepe, M. [INFN, Istituto Nazionale di Fisica Nucleare, Sezione di Milano-Bicocca, Edificio U2, Piazza della Scienza 3, 20126 Milano (Italy); Wiese, U.-J. [Center for Research and Education in Fundamental Physics, Institute for Theoretical Physics, Bern University, Sidlerstrasse 5, 3012 Bern (Switzerland); Institute for Theoretical Physics, ETH Zuerich, Schafmattstrasse 32, CH-8093 Zuerich (Switzerland)

2009-05-15T23:59:59.000Z

294

Page not found | Department of Energy  

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

71 - 17980 of 28,560 results. 71 - 17980 of 28,560 results. Download EM SSAB Conference Calls- October 5, 2010 Minutes and highlights of the Environmental Management (EM) Site Specific Advisory Board's (SSAB) Bi-Monthly conference call including Participants, DOE-HQ Representatives, Opening Remarks, Program... http://energy.gov/em/downloads/em-ssab-conference-calls-october-5-2010 Page Long-Term Stewardship Resource Center FAQS By Order from the Secretary of Energy, The DOE, including the National Nuclear Security Administration must comply with Order 454.1: Use of Institutional Controls, www.directives.doe.gov/directives... http://energy.gov/em/long-term-stewardship-resource-center-faqs Page Types of Reuse The following provides greater detail regarding the types of reuse pursued for LM sites. It should be noted that many actual reuses combine several

295

String Theory, Universal Mind, and the Paranormal  

E-Print Network (OSTI)

A model consistent with string theory is proposed for so-called paranormal phenomena such as extra-sensory perception (ESP). Our mathematical skills are assumed to derive from a special 'mental vacuum state', whose origin is explained on the basis of anthropic and biological arguments, taking into account the need for the informational processes associated with such a state to be of a life-supporting character. ESP is then explained in terms of shared 'thought bubbles' generated by the participants out of the mental vacuum state. The paper concludes with a critique of arguments sometimes made claiming to 'rule out' the possible existence of paranormal phenomena.

Brian D. Josephson

2003-12-02T23:59:59.000Z

296

On-line Approximate String Matching in Natural Language  

Science Conference Proceedings (OSTI)

We consider approximate pattern matching in natural language text. We use the words of the text as the alphabet, instead of the characters as in traditional string matching approaches. Hence our pattern consists of a sequence of words. From the algorithmic ... Keywords: Approximate string matching, filtering, natural language processing, phrase matching, word alphabet

Kimmo Fredriksson

2006-09-01T23:59:59.000Z

297

Resonant acoustic transducer system for a well drilling string  

DOE Patents (OSTI)

For use in transmitting acoustic waves propated along a well drilling string, a piezoelectric transducer is provided operating in the relatively low loss acoustic propagation range of the well drilling string. The efficiently coupled transmitting transducer incorporates a mass-spring-piezoelectric transmitter combination permitting a resonant operation in the desired low frequency range.

Nardi, Anthony P. (Burlington, MA)

1981-01-01T23:59:59.000Z

298

Signature of cosmic string wakes in the CMB polarization  

Science Conference Proceedings (OSTI)

We calculate a signature of cosmic strings in the polarization of the cosmic microwave background. We find that ionization in the wakes behind moving strings gives rise to extra polarization in a set of rectangular patches in the sky whose length distribution is scale-invariant. The length of an individual patch is set by the comoving Hubble radius at the time the string is perturbing the cosmic microwave background. The polarization signal is largest for string wakes produced at the earliest post-recombination time, and for an alignment in which the photons cross the wake close to the time the wake is created. The maximal amplitude of the polarization relative to the temperature quadrupole is set by the overdensity of free electrons inside a wake which depends on the ionization fraction f inside the wake. For a cosmic string wake coming from an idealized string segment, the signal can be as high as 0.06 {mu}K in degree scale polarization for a string at high redshift (near recombination) and a string tension {mu} given by G{mu}=10{sup -7}.

Danos, Rebecca J.; Brandenberger, Robert H.; Holder, Gil [Department of Physics, McGill University, Montreal, QC, H3A 2T8 (Canada)

2010-07-15T23:59:59.000Z

299

From string theory to algebraic geometry and back  

Science Conference Proceedings (OSTI)

We describe some facts in physics which go up to the modern string theory and the related concepts in algebraic geometry. Then we present some recent results on moduli-spaces of vector bundles on non-Kaehler Calabi-Yau 3-folds and their consequences for heterotic string theory.

Brinzanescu, Vasile ['Simion Stoilow' Institute of Mathematics of the Romanian Academy, P.O.Box 1-764, Bucharest (Romania)

2011-02-10T23:59:59.000Z

300

Resonant acoustic transducer system for a well drilling string  

DOE Patents (OSTI)

For use in transmitting acoustic waves propagated along a well drilling string, a piezoelectric transducer is provided operating in the relatively low loss acoustic propagation range of the well drilling string. The efficiently coupled transmitting transducer incorporates a mass-spring-piezoelectric transmitter combination permitting resonant operation in the desired low frequency range.

Kent, William H. (Westford, MA); Mitchell, Peter G. (Concord, MA)

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "type string pages" 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

Non-Abelian strings in supersymmetric Yang-Mills  

Science Conference Proceedings (OSTI)

I give a broad review of novel phenomena discovered in certain Yang-Mills theories: non-Abelian strings and confined monopoles. Then I explain how these phenomena allow one to study strong dynamics of gauge theories in four dimensions from two-dimensional models emerging on the string world sheet.

Shifman, M. [William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, MN 55455 (United States)

2012-09-26T23:59:59.000Z

302

How does gluon string split into two quark ones  

Science Conference Proceedings (OSTI)

In this paper, the authors assume that gluon string splits into two quark ones and not instantaneously but via creation of the so-called zip-antizip pairs along the gluon string. This additional stage prolongs hadronization process and gives the novel source of fluctuations that softens hadron z-spectrum and widens the multiplicity distribution.

Gurvich, E.G.; Leptoukh, G.G. (Inst. of Physics of the Georgian Academy of Sciences, Tamarashvili 6, Tbilisi (USSR))

1992-09-28T23:59:59.000Z

303

Charged Vacuum Condensate Near a Superconducting Cosmic String  

E-Print Network (OSTI)

A charged superconductiong cosmic string produces an extremely large electric field in its vicinity. This leads to vacuum instability and to the formation of a charged vacuum condensate which screens the electric charge of the string. We analyze the structure of this condensate using the Thomas-Fermi method.

J. R. S. Nascimento; Inyong Cho; Alexander Vilenkin

1999-02-18T23:59:59.000Z

304

Black hole/string ball production, possibly at LHC  

E-Print Network (OSTI)

I show a brief historical overview of recent developments on the black hole physics that can be possibly explored at LHC. I comment on the correspondence principle of black holes and strings and show its realization in a differential production cross section of a black hole/string ball with fixed angular momentum.

Oda, Kin-ya

2010-01-01T23:59:59.000Z

305

Cosmic String constraints from WMAP and the South Pole Telescope  

E-Print Network (OSTI)

The predictions of the inflationary LCDM paradigm match today's high-precision measurements of the cosmic microwave background anisotropy extremely well. The same data put tight limits on other sources of anisotropy. Cosmic strings are a particularly interesting alternate source to constrain. Strings are topological defects, remnants of inflationary-era physics that persist after the big bang. They are formed in a variety of models of inflation, including string theory models such as brane inflation. We assume a "Nambu-Goto" model for strings, approximated by a collection of unconnected segments with zero width, and show that measurements of temperature anisotropy by the South Pole Telescope break a parameter degeneracy in the WMAP data, permitting us to place a strong upper limit on the possible string contribution to the CMB anisotropy: the power sourced by zero-width strings must be <1.75% (95% CL) of the total or the string tension Gmu <1.7x10^{-7}. These limits imply that the best hope for detecting strings in the CMB will come from B-mode polarization measurements at arcminute scales rather than the degree scale measurements pursued for gravitational wave detection.

Cora Dvorkin; Mark Wyman; Wayne Hu

2011-09-22T23:59:59.000Z

306

Quantum Fusion of Strings (Flux Tubes) and Domain Walls  

E-Print Network (OSTI)

We consider formation of composite strings and domain walls as a result of fusion of two elementary objects (elementary strings in the first case and elementary walls in the second) located at a distance from each other. The tension of the composite object T_2 is assumed to be less than twice the tension of the elementary object T_1, so that bound states are possible. If in the initial state the distance d between the fusing strings or walls is much larger than their thickness and satisfies the conditions T_1 d^2 >> 1 (in the string case) and T_1 d^3 >> 1 (in the wall case), the problem can be fully solved quasiclassically. The fusion probability is determined by the first, "under the barrier" stage of the process. We find the bounce configuration and its extremal action S_B. In the wall problem e^{-S_B} gives the fusion probability per unit time per unit area. In the string case, due to a logarithmic infrared divergence, the problem is well formulated only for finite-length strings. The fusion probability per unit time can be found in the limit in which the string length is much larger than the distance between two merging strings.

S. Bolognesi; M. Shifman; M. B. Voloshin

2009-05-11T23:59:59.000Z

307

Signatures of Cosmic Strings in the Cosmic Microwave Background  

E-Print Network (OSTI)

We report a search for signatures of cosmic strings in the the Cosmic Microwave Background data from the Wilkinson Microwave Anisotropy Probe. We used a digital filter designed to search for individual cosmic strings and found no evidence for them in the WMAP CMB anisotropies to a level of $\\Delta T/T \\sim 0.29$ mK. This corresponds to an absence of cosmic strings with $ G\\mu \\ga 1.07 \\times 10^{-5}$ for strings moving with velocity $v = c/\\sqrt{2}$. Unlike previous work, this limit does not depend on an assumed string abundance. We have searched the WMAP data for evidence of a cosmic string recently reported as the CSL-1 object, and found an ``edge'' with 2$\\sigma$ significance. However, if this edge is real and produced by a cosmic string, it would have to move at velocity $\\ga$ 0.94c. We also present preliminary limits on the CMB data that will be returned by the PLANCK satellite for comparison. With the available information on the PLANCK satellite, we calculated that it would be twice as sensitive to cosmic strings as WMAP.

Amy S. Lo; Edward L. Wright

2005-03-05T23:59:59.000Z

308

Help:Talk pages | Open Energy Information  

Open Energy Info (EERE)

Talk pages Talk pages Jump to: navigation, search Every wiki page has an associated talk page which can be used for discussion and communicating with other users. Talk pages can be accessed by clicking the "discussion" tab at the top of the page. Simply edit the page as normal to add your comment. A talk page is actually very similar to any other wiki page, but it is in the "Talk" namespace, to keep it separate from the articles in the "(Main)" namespace (See Help:namespaces). As with any wiki page, you can edit it, link to it, and view the editing history. Contents 1 Editing conventions on talk pages 1.1 Example 2 Editing discussions 3 Building articles - Discussing articles 4 User talk pages Editing conventions on talk pages Having discussions on a free-form wiki page will seem strange at first. It

309

Save Money with LED Holiday Light Strings | Department of Energy  

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

Money with LED Holiday Light Strings Money with LED Holiday Light Strings Save Money with LED Holiday Light Strings December 1, 2009 - 11:19am Addthis Allison Casey Senior Communicator, NREL It's hard to believe, but the holidays are in full swing and many of you are starting to decorate your homes. Those of you who started around Halloween are probably feeling pretty smart because you got your decorating done while the weather was nice. I see you there, snacking on your Thanksgiving leftovers, laughing at me shivering in the cold and struggling to undo the knot in my lights. Don't look so smug. Those of us who haven't started decorating yet may actually be the smart ones this year, because we still have a chance to buy LED light strings. LED (or light emitting diode) light strings can use 90% less energy than

310

Probing the 5th Dimension with the QCD String  

E-Print Network (OSTI)

A salient feature of String/Gauge duality is an extra 5th dimension. Here we study the effect of confining deformations of AdS5 and compute the spectrum of a string stretched between infinitely massive quarks and compare it with the quantum states of the QCD flux as determined by Kuti, Juge and Morningstar in lattice simulations. In the long flux tube limit the AdS string probes the metric near the IR cutoff of the 5th dimension with a spectrum approximated by a Nambu-Goto string in 4-d flat space, whereas at short distance the string moves to the UV region with a discrete spectrum for pure AdS5. We also review earlier results on glueballs states and the cross-over between hard and soft diffractive scattering that support this picture.

Richard C. Brower; Chung-I Tan; Ethan Thompson

2005-03-29T23:59:59.000Z

311

String stabilized ribbon growth a method for seeding same  

DOE Patents (OSTI)

This invention is a method of initiating or seeding the growth of a crystalline or polycrystalline ribbon by the String Stabilized Ribbon Growth Method. The method for seeding the crystal growth comprises contacting a melt surface with a seed and two strings used in edge stabilization. The wetted strings attach to the wetted seed as a result of the freezing of the liquid melt. Upon drawing the seed, which is attached to the strings, away from the melt surface a melt liquid meniscus, a seed junction, and a growth interface forms. Further pulling of the attached seed causes a crystal ribbon to grow at the growth interface. The boundaries of the growing ribbon are: at the top the seed junction, at the bottom the freezing boundary of the melt liquid meniscus, and at the edges frozen-in strings.

Sachs, Emanuel M. (39 Harding Ave., Belmont, MA 02178)

1987-08-25T23:59:59.000Z

312

Hosting Web Pages at NERSC  

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

Hosting Webpages Hosting Webpages While PDSF no longer provides a webserver for its users webpages can be hosted from NGF. To do this put your pages under projectprojectdirs...

313

EERE: Energy Analysis Home Page  

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

Analysis Search Search Help Energy Analysis HOME ABOUT FEATURED CONTENT EERE Energy Analysis Printable Version Share this resource Send a link to EERE: Energy Analysis Home Page...

314

Department of Energy Home Page  

Office of Scientific and Technical Information (OSTI)

US DEPARTMENT OF ENERGY Search Home Page Contents ABOUT DOE About The Department of Energy (Learn about the Department of Energy, its mission, plans, organizational structure,...

315

NSLS-II Project Pages  

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

NSLS-II Project Pages Project Management Team Project Schedule Integrated Project Team (IPT) Monthly Status Meetings Advisory Committees Project Reviews Documents NSLS-II...

316

TMS Jobs and Careers Page  

Science Conference Proceedings (OSTI)

For information about purchasing classified advertising in JOM, visit the journal's advertising page or reserve a classified space by submitting the Classified ...

317

Strings, black holes, and quantum information  

SciTech Connect

We find multiple relations between extremal black holes in string theory and 2- and 3-qubit systems in quantum information theory. We show that the entropy of the axion-dilaton extremal black hole is related to the concurrence of a 2-qubit state, whereas the entropy of the STU black holes, Bogomol'nyi-Prasad-Sommerfield (BPS) as well as non-BPS, is related to the 3-tangle of a 3-qubit state. We relate the 3-qubit states with the string theory states with some number of D-branes. We identify a set of large black holes with the maximally entangled Greenberger, Horne, Zeilinger (GHZ) class of states and small black holes with separable, bipartite, and W states. We sort out the relation between 3-qubit states, twistors, octonions, and black holes. We give a simple expression for the entropy and the area of stretched horizon of small black holes in terms of a norm and 2-tangles of a 3-qubit system. Finally, we show that the most general expression for the black hole and black ring entropy in N=8 supergravity/M theory, which is given by the famous quartic Cartan E{sub 7(7)} invariant, can be reduced to Cayley's hyperdeterminant describing the 3-tangle of a 3-qubit state.

Kallosh, Renata; Linde, Andrei [Department of Physics, Stanford University, Stanford, California 94305 (United States)

2006-05-15T23:59:59.000Z

318

Input-independent, Scalable and Fast String Matching on the Cray XMT  

Science Conference Proceedings (OSTI)

String searching is at the core of many security and network applications like search engines, intrusion detection systems, virus scanners and spam ?lters. The growing size of on-line content and the increasing wire speeds push the need for fast, and often real- time, string searching solutions. For these conditions, many software implementations (if not all) targeting conventional cache-based microprocessors do not perform well. They either exhibit overall low performance or exhibit highly variable performance depending on the types of inputs. For this reason, real-time state of the art solutions rely on the use of either custom hardware or Field-Programmable Gate Arrays (FPGAs) at the expense of overall system ?exibility and programmability. This paper presents a software based implementation of the Aho-Corasick string searching algorithm on the Cray XMT multithreaded shared memory machine. Our so- lution relies on the particular features of the XMT architecture and on several algorith- mic strategies: it is fast, scalable and its performance is virtually content-independent. On a 128-processor Cray XMT, it reaches a scanning speed of ? 28 Gbps with a performance variability below 10 %. In the 10 Gbps performance range, variability is below 2.5%. By comparison, an Intel dual-socket, 8-core system running at 2.66 GHz achieves a peak performance which varies from 500 Mbps to 10 Gbps depending on the type of input and dictionary size.

Villa, Oreste; Chavarría-Miranda, Daniel; Maschhoff, Kristyn J.

2009-05-25T23:59:59.000Z

319

(Continued on page 2) (Continued on page 2)  

E-Print Network (OSTI)

MAY 2009 (Continued on page 2) (Continued on page 2) WWW.RSMAS.MIAMI.EDU DEAN OTIS BROWN: A LEGACY of his decades of service and dedication to the University of Miami, Brown was awarded the UM Presidents in 2003, the University of Miami Presidents Medal honors individuals for their outstanding leadership

Miami, University of

320

Page 1 of 4 Pages Faculty of Law  

E-Print Network (OSTI)

Page 1 of 4 Pages Faculty of Law FINAL EXAMINATION - APRIL 2003 543:B1 BASIC OIL & GAS LAW (Percy and natural gas lease with Stewart Exploration. The lease included the following terms: To Have And Enjoy, or production of the leased substances or any of them (whether or not in #12;543:A1 BASIC OIL & GAS LAW (Percy

MacMillan, Andrew

Note: This page contains sample records for the topic "type string pages" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

A snapping cosmic string in a de Sitter or anti-de Sitter universe  

E-Print Network (OSTI)

We present and describe an exact solution of Einstein's equations which represents a snapping cosmic string in a vacuum background with a cosmological constant $\\Lambda$. The snapping of the string generates an impulsive spherical gravitational wave which is a particular member of a known family of such waves. The global solution for all values of $\\Lambda$ is presented in various metric forms and interpreted geometrically. It is shown to represent the limit of a family of sandwich type N Robinson-Trautman waves. It is also derived as a limit of the C-metric with $\\Lambda$, in which the acceleration of the pair of black holes becomes unbounded while their masses are scaled to zero.

J. Podolsky; J. B. Griffiths

2004-03-22T23:59:59.000Z

322

RMOTC - Articles - Page 2  

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

Geothermal Energy Holds Strong Presence at Renewable Energy World Geothermal Energy Holds Strong Presence at Renewable Energy World Conference Geothermal Energy Weekly, March 5, 2010 (Page 4) Oil Production Waste Stream: A Source of Electrical Power Renewable Energy World, January 2010 Wireline retrievable ESP shuttle could change pump management paradigms (PDF) World Oil, January 2010 Self-cleaning screen improves recovery, avoids costly workovers (PDF) World Oil, October 2009 Low-frequency drillbit seismic while drilling (PDF) World Oil, July 2009 DOE site collaborates w/ community to teach 4-H youth about GIS (PDF) Contact, Wyoming Geological Association, June 2009 New water sensor may allow easy well monitoring (PDF) World Oil, April 2009 Active vibration damper improves performance and reduces drilling costs (PDF) World Oil, September 2008

323

WIPP Stakeholder Information Page  

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

WIPP Stakeholder Information Page Closure of Underground Hazardous Waste Disposal Unit Notification of Panel 6 Closure and Final Waste Emplacement dated November 5, 2013 Notification of Last Waste Emplacement and Intent to Commence Closure of the Waste Isolation Pilot Plant Hazardous Waste Disposal Unit Panel 5 dated March 30, 2011 Submittal of Final Audit Reports Audit Report A-07-16 for INL/CCP RH Waste Characterization Activities dated November 22, 2006 Transmittal of the Certification Audit Report for SRS A-07-01 dated November 21, 2006 CEMRC-CCP Final Audit Report Transmittal dated March 27, 2007 Transmittal of the Final Report of CBFO Recertification Audit A-06-06 of the INL Analytical Laboratories dated June 13, 2007 Transmittal of the Certification Audit Report for the INL/CCP Audit A-07-19 dated June 20, 2007

324

Page 1 of 2  

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

~ ~ Page 1 of 2 1) This memorandum provides reminders on the proper use of non-DOE contracting vehicles. including Economy Act transactions. Government-wide Acquisition Contracts. and Federal Supply Schedules. The recent discovery of improper use of such contracting vehicles has led to investigations ,:>f procurement activities at the General Services Administration and Department of Defense. Contracting Officers are cautioned to be diligent in the use of other agencies' contracting vehicles. 2) This memorandwn provides an overview of a Biobased Products Procurement Preference Program being developed as a result of the F8ml Security and Rural Development Act of 2002 and a recent rulemaking issued by the U.S. Department of Agriculture. It will highlight

325

TVDG Home Page  

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

for Upton, New York Forecast for Upton, New York Forecast Welcome to TVDG Logo the BNL Tandem Brookhaven National Laboratory's Tandem Van de Graaff Accelerator Facility We have a NEW Home Page. Please try it and let us know about any omissions or additions you would like to see on our new site. Where Can We Go From Here? 10 Steps 10 steps to your Tandem experiment. SEU Availability SEU availability calendar for our facility. Here you can see when the facility is available for running SEU. Species List of ions, energies and LETs that are available at our facility. Reservations Fill-in form that allows registered users to reserve time at our facility via the Web. User Registration Users are required to register before being allowed on site Contacts List of contact people at our facility and how to reach us by phone, fax or e-mail.

326

Help:Special pages | Open Energy Information  

Open Energy Info (EERE)

Special pages are pages that are created by the software on demand. They Special pages are pages that are created by the software on demand. They are located in their own namespace Special: and are not editable directly as other pages. Some special pages depend on the preferences that have been set by a user, e.g. the number of titles which is displayed on a user's watchlist. List of special pages Clicking the link Special:Specialpages will take you to a list of all special pages on a wiki. Such a link is often accessible in the toolbox on the left hand panel. Some special pages can be transcluded. New images (includable) New pages (includable) Preferences Random page Recent changes (includable) Watchlist ... Retrieved from "http://en.openei.org/w/index.php?title=Help:Special_pages&oldid=58510" Categories: Help Special Pages

327

Page 1 of 3 INSTRUCTIONS  

E-Print Network (OSTI)

/Dean Alts · Click . · Enter SHARE for SetID if not prepopulated. · Search for and select the OMNI Userid/29/2008 The terms "Chair" and "Dean" are used generically to represent unit hierarchy. A new page (Grants. #12;Page 2 of 3 · Do not change Eff Date or Status. · Search for and select the OMNI Userid

McQuade, D. Tyler

328

of Satisfiability Solving for String Theories  

E-Print Network (OSTI)

personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise, to republish, to post on servers or to redistribute to lists, requires prior specific permission.

Sanjit A. Seshia; Rhishikesh Shrikant Limaye; Susmit Jha; Sanjit A. Seshia; Rhishikesh Limaye

2009-01-01T23:59:59.000Z

329

Spiky strings in the Bethe ansatz at strong coupling  

Science Conference Proceedings (OSTI)

We study spiky string solutions in AdS{sub 3}xS{sup 1} that are characterized by two spins S, J as well as winding m in S{sup 1} and spike number n. We construct explicitly two-cut solutions by using the SL(2) asymptotic Bethe ansatz equations at leading order in strong coupling. Unlike the folded spinning string, these solutions have asymmetric distributions of Bethe roots. The solutions match the known spiky string classical results obtained directly from string theory for arbitrary semiclassical parameters, including J=0 and any value of S, namely, short and long strings. At large spins and winding number the string touches the boundary, and we find a new scaling limit with the energy given as E-S=(n/2{pi}){radical}(1+[(4{pi}{sup 2})/n{sup 2}](J{sup 2}/ln{sup 2}S+m{sup 2}/ln{sup 2}S))lnS. This is a generalization of the known scaling for the folded spinning string.

Kruczenski, M.; Tirziu, A. [Department of Physics, Purdue University, W. Lafayette, Indiana 47907-2036 (United States)

2010-05-15T23:59:59.000Z

330

Help:Copying Page Content to New Page | Open Energy Information  

Open Energy Info (EERE)

Copying Page Content to New Page Copying Page Content to New Page Jump to: navigation, search To copy a page to a new page Go to the page you want to copy Click "Edit" under "Page Actions". Do a "Select all" (Ctrl+A) of the page content in the box and copy (Ctrl-C) the content. In another window or tab, create a new page name using the url. You can use the wiki's URL for creating a new page. The URL to an article of the wiki is usually something like this: http://www.example.net/wiki/ARTICLE If you replace ARTICLE with the name of the page you wish to create, you will be taken to a blank page which indicates that no article of that name exists yet. Clicking the "Create" button at the top of the page will take you to the edit page for that article, where you can create the new page by

331

The SSC full cell prototype string test  

Science Conference Proceedings (OSTI)

At the conclusion of the SSC half cell magnet string testing program in February, 1993, the preliminary data analysis revealed that several substantive technical questions remained unresolved. These questions were: (1) could the high voltages to ground (>2 kV) measured during fault (quench) conditions be substantially reduced, (2) could the number of magnetic elements that became resistive (quenched) be controlled and 3) did the cryostats of the magnetic elements provide adequate insulation and isolation to meet designed refrigeration loads. To address these and other existing questions, a prototypical fall cell of collider magnets (ten dipoles and two quadrupoles) was assembled and tested. At the conclusion of this testing there were definitive answers to most of the questions with numerical substantiation, the notable exception being the beat leak question. These answers and other results and issues are presented in this paper.

McInturff, A.D. [Lawrence Berkeley Lab., CA (United States); Kraushaar, P.; Burgett, W.; Cromer, L. [Superconducting Super Collider Lab., Dallas, TX (United States)] [and others

1994-10-17T23:59:59.000Z

332

Conformable apparatus in a drill string  

DOE Patents (OSTI)

An apparatus in a drill string comprises an internally upset drill pipe. The drill pipe comprises a first end, a second end, and an elongate tube intermediate the first and second ends. The elongate tube and the ends comprising a continuous an inside surface with a plurality of diameters. A conformable metal tube is disposed within the drill pipe intermediate the ends thereof and terminating adjacent to the ends of the drill pipe. The conformable metal tube substantially conforms to the continuous inside surface of the metal tube. The metal tube may comprise a non-uniform section which is expanded to conform to the inside surface of the drill pipe. The non-uniform section may comprise protrusions selected from the group consisting of convolutions, corrugations, flutes, and dimples. The non-uniform section extends generally longitudinally along the length of the tube. The metal tube may be adapted to stretch as the drill pipes stretch.

Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David S. (Lehi, UT); Fox, Joe (Spanish Fork, UT)

2007-08-28T23:59:59.000Z

333

Axions as quintessence in string theory  

Science Conference Proceedings (OSTI)

We construct a model of quintessence in string theory based on the idea of axion monodromy as discussed by McAllister, Silverstein and Westphal [L. McAllister, E. Silverstein, and A. Westphal, Phys. Rev. D 82, 046003 (2010)]. In the model, the quintessence field is an axion whose shift symmetry is broken by the presence of 5-branes which are placed in highly warped throats. This gives rise to a potential for the axion field which is slowly varying, even after incorporating the effects of moduli stabilization and supersymmetry breaking. We find that the resulting time dependence in the equation of state of dark energy is potentially detectable, depending on the initial conditions. The model has many very light extra particles which live in the highly warped throats, but these are hard to detect. A signal in the rotation of the CMB polarization can also possibly arise.

Panda, Sudhakar [Harish-Chandra Research Institute, Allahabad 211019 (India); Sumitomo, Yoske; Trivedi, Sandip P. [Tata Institute of Fundamental Research, Mumbai 400005 (India)

2011-04-15T23:59:59.000Z

334

Harmonic coordinates in the string and membrane equations  

Science Conference Proceedings (OSTI)

In this note, we first show that the solutions to Cauchy problems for two versions of relativistic string and membrane equations are diffeomorphic. Then we investigate the coordinates transformation presented in D. X. Kong and Q. Zhang [Physica D 238, 902 (2009); see (2.20)] which plays an important role in the study on the dynamics of the motion of string in Minkowski space. This kind of transformed coordinates is harmonic coordinates, and the nonlinear relativistic string equations can be straightforwardly simplified into linear wave equations under this transformation.

He Chunlei; Huang Shoujun [Department of Mathematics, Anhui Normal University, Wuhu 241000 (China)

2010-09-15T23:59:59.000Z

335

Cerenkov radiation from collisions of straight cosmic (super)strings  

E-Print Network (OSTI)

We consider Cerenkov radiation which must arise when randomly oriented straight cosmic (super)strings move with relativistic velocities without intercommutation. String interactions via dilaton, two-form and gravity (gravity being the dominant force in the ultra-relativistic regime) leads to formation of superluminal sources which generate Cerenkov radiation of dilatons and axions. Though the effect is of the second order in the couplings of strings to these fields, its total efficiency is increased by high dependence of the radiation rate on the Lorentz-factor of the collision.

Elena Melkumova; Dmitri Gal'tsov; Karim Salehi

2006-12-26T23:59:59.000Z

336

Dynamics of a global string with large Higgs boson mass  

E-Print Network (OSTI)

We consider a self-gravitating string generated by a global vortex solution in general relativity. We investigate the Einstein and field equations of a global vortex in the region of its central line and at a distance from the centre of the order of the inverse of its Higgs boson mass. By combining the two we establish by a limiting process of large Higgs mass the dynamics of a self-gravitating global string. Under our assumptions the presence of gravitation restricts the world sheet of the global string to be totally geodesic.

C. Charmousis; B. Boisseau; B. Linet

1997-08-01T23:59:59.000Z

337

Multiloop World-Line Green Functions from String Theory  

E-Print Network (OSTI)

We show how the multiloop bosonic Green function of closed string theory reduces to the world-line Green function as defined by Schmidt and Schubert in the limit where the string world-sheet degenerates into a $\\Phi^3$ particle diagram. To obtain this correspondence we have to make an appropriate choice of the local coordinates defined on the degenerate string world sheet. We also present a set of simple rules that specify, in the explicit setting of the Schottky parametrization, which is the corner of moduli space corresponding to a given multiloop $\\Phi^3$ diagram.

Kaj Roland; Haru-Tada Sato

1996-04-24T23:59:59.000Z

338

Black Rings, Boosted Strings and Gregory-Laflamme  

E-Print Network (OSTI)

We investigate the Gregory-Laflamme instability for black strings carrying KK-momentum along the internal direction. We demonstrate a simple kinematical relation between the thresholds of the classical instability for the boosted and static black strings. We also find that Sorkin's critical dimension depends on the internal velocity and in fact disappears for sufficiently large boosts. Our analysis implies the existence of an analogous instability for the five-dimensional black ring of Emparan and Reall. We also use our results for boosted black strings to construct a simple model of the black ring and argue that such rings exist in any number of space-time dimensions.

J. L. Hovdebo; R. C. Myers

2006-01-12T23:59:59.000Z

339

Duality Symmetric String and M-Theory  

E-Print Network (OSTI)

We review recent developments in duality symmetric string theory. We begin with the world sheet doubled formalism which describes strings in an extended space time with extra coordinates conjugate to winding modes. This formalism is T-duality symmetric and can accommodate non-geometric T-fold backgrounds which are beyond the scope of Riemannian geometry. Vanishing of the conformal anomaly of this theory can be interpreted as a set of spacetime equations for the background fields. These equations follow from an action principle that has been dubbed Double Field Theory (DFT). We review the aspects of generalised geometry relevant for DFT. We outline recent extensions of DFT and explain how, by relaxing the so-called strong constraint with a Scherk Schwarz ansatz, one can obtain backgrounds that simultaneously depend on both the regular and T-dual coordinates. This provides a purely geometric higher dimensional origin to gauged supergravities that arise from non-geometric compactification. We then turn to M-theory and describe recent progress in formulating an E_{n(n)} U-duality covariant description of the dynamics. We describe how spacetime may be extended to accommodate coordinates conjugate to brane wrapping modes and the construction of generalised metrics in this extend space that unite the bosonic fields of supergravity into a single object. We review the action principles for these theories and their novel gauge symmetries. We also describe how a Scherk Schwarz reduction can be applied in the M-theory context and the resulting relationship to the embedding tensor formulation of maximal gauged supergravities.

David S. Berman; Daniel C. Thompson

2013-06-11T23:59:59.000Z

340

Page not found | Department of Energy  

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

Error message The page you requested does not exist. For your convenience, a search was performed using the query Flash2009 19. You are here Home Page not found Page not found...

Note: This page contains sample records for the topic "type string pages" 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

Page not found | Department of Energy  

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

Error message The page you requested does not exist. For your convenience, a search was performed using the query Flash2009 26Attachment2. You are here Home Page not found Page...

342

Page not found | Department of Energy  

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

Error message The page you requested does not exist. For your convenience, a search was performed using the query Flash2009 30. You are here Home Page not found Page not found...

343

Page not found | Department of Energy  

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

Error message The page you requested does not exist. For your convenience, a search was performed using the query Flash2010 25. You are here Home Page not found Page not found...

344

Page not found | Department of Energy  

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

Error message The page you requested does not exist. For your convenience, a search was performed using the query AttachmentFlash2010 55. You are here Home Page not found Page...

345

Energy Efficiency -- Home Page  

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

If you are having trouble, call 202-586-8800 for help. If you are having trouble, call 202-586-8800 for help. Home >Energy Users EEnergy Efficiency Page Energy-Efficiency Measurement MEASUREMENT DISCUSSION: Measures and Policy Issues Energy Intensity as a Common Surrogate for Energy Efficiency Indices as a Measure of Relative Changes Market-Basket Comprehensive Factorial Decomposition Divisia Index OTHER MEASUREMENT APPROACHES: Best Practice MEASUREMENT ISSUES : Site Energy Versus Primary Energy Physical Versus Economic Units picture of line graph on stand Energy Efficiency Measurement Discussion The development of energy-efficiency indictors, for any country, is limited by the availability of data. Data are limited for several reasons. As the amount of data collected increases so do the costs of collecting, processing, and analyzing the data. The configuration of certain technologies and processes can also limit the possibility of obtaining microdata. As an example, in the manufacturing sector, some motors are encased in such a way that it is impossible to collect data on the motor unless records have been maintained for the motor. This leads to another reason data are limited--respondent burden. Care has to be taken so that surveys are not so long that participation is discouraged or inaccurate answers are given due to the difficulty and time it takes to obtain the data.

346

Aho-Corasick String Matching on Shared and Distributed Memory Parallel Architectures  

SciTech Connect

String matching is at the core of many critical applications, including network intrusion detection systems, search engines, virus scanners, spam filters, DNA and protein sequencing, and data mining. For all of these applications string matching requires a combination of (sometimes all) the following characteristics: high and/or predictable performance, support for large data sets and flexibility of integration and customization. Many software based implementations targeting conventional cache-based microprocessors fail to achieve high and predictable performance requirements, while Field-Programmable Gate Array (FPGA) implementations and dedicated hardware solutions fail to support large data sets (dictionary sizes) and are difficult to integrate and customize. The advent of multicore, multithreaded, and GPU-based systems is opening the possibility for software based solutions to reach very high performance at a sustained rate. This paper compares several software-based implementations of the Aho-Corasick string searching algorithm for high performance systems. We discuss the implementation of the algorithm on several types of shared-memory high-performance architectures (Niagara 2, large x86 SMPs and Cray XMT), distributed memory with homogeneous processing elements (InfiniBand cluster of x86 multicores) and heterogeneous processing elements (InfiniBand cluster of x86 multicores with NVIDIA Tesla C10 GPUs). We describe in detail how each solution achieves the objectives of supporting large dictionaries, sustaining high performance, and enabling customization and flexibility using various data sets.

Tumeo, Antonino; Villa, Oreste; Chavarría-Miranda, Daniel

2012-03-01T23:59:59.000Z

347

Web Page Error 500 Page Cannot Be Displayed  

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

requested cannot be displayed. There is a problem with the page you are trying to reach and it cannot be displayed. Please try the following: Click the Refresh button, or try again...

348

Page not found | Department of Energy  

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

71 - 24880 of 26,764 results. 71 - 24880 of 26,764 results. Download Open Data Catalogue This page contains the Department of Energy's Public Data Listing in JSON and XML formats. http://energy.gov/data/downloads/open-data-catalogue Download Reference Buildings by Building Type: Primary school In addition to the ZIP file for each building type, you can directly view the "scorecard" spreadsheet that summarizes the inputs and results for each location. This Microsoft Excel spreadsheet is also included in the ZIP file. For version 1.4, only the IDF file is included. http://energy.gov/eere/downloads/reference-buildings-building-type-primary-school Download Reference Buildings by Climate Zone and Representative City: 5B Boulder, Colorado In addition to the ZIP file for each building type, you can directly view

349

Page not found | Department of Energy  

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

31 - 21640 of 28,905 results. 31 - 21640 of 28,905 results. Page Types of Reuse The following provides greater detail regarding the types of reuse pursued for LM sites. It should be noted that many actual reuses combine several types of the uses listed below. http://energy.gov/lm/services/property-management/property-reuse/types-reuse Download EIS-0285-SA-37-2002.pdf http://energy.gov/downloads/eis-0285-sa-37-2002pdf Download Software Change Request (SCR) Form http://energy.gov/cio/downloads/software-change-request-scr-form Download WA_99_008_DUPONT_SUPERCONDUCTIVITY_Waiver_of_US_and_Foreign_.pdf http://energy.gov/gc/downloads/wa99008dupontsuperconductivitywaiverofusandforeignpdf Download Regulatory Reduction RFI, 76 Fed. Reg. 6123, February 3, 2011 http://energy.gov/gc/downloads/regulatory-reduction-rfi-76-fed-reg-6123-february-3-2011-0

350

LInC Engaged Learning Home Page  

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

for completing. As you work through these pages, you may need Web authoring skills and file transfer skills. Refer to our Technology Home Page for guidance and...

351

Page not found | Department of Energy  

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

national-parks-move-transportation-forward-america-s-great-outdoors Page HRP Handbook Glossary... http:energy.govhsshrp-handbook-11 Page InspectionSampling Schedule Note:...

352

Links to Muon Collider Related Web Pages  

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

Muon Collider related web pages: Muon Collider Feasibility Study ... Fermilab Page MUCOOL Collaboration: Ionization Cooling R&D Snowmass 1996 Feasibility Study Book Brookhaven Muon...

353

Home > Households, Buildings & Industry > Energy Efficiency Page ...  

U.S. Energy Information Administration (EIA)

Home > Households, Buildings & Industry > Energy Efficiency Page > Energy Intensities >Table 7a Glossary U.S. Residential Housing Primary Page Last Revised: July 2009

354

Household Vehicles Energy Use Cover Page  

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

Household Vehicles Energy Use Cover Page Glossary Home > Households, Buildings & Industry >Transportation Surveys > Household Vehicles Energy Use Cover Page Contact Us * Feedback *...

355

Home > Households, Buildings & Industry > Energy Efficiency Page ...  

U.S. Energy Information Administration (EIA)

Home > Households, Buildings & Industry > Energy Efficiency Page > Energy Intensities > Table 5c Glossary U.S. Residential Housing Site Page Last Revised: July 2009

356

Page not found | Department of Energy  

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

21 - 4030 of 9,178 results. Page Windows Public Tools Windows http:energy.govciowindows-public-tools Page Utilities Below are resources for Tribes about utilities. http:...

357

Property:ProjectType | Open Energy Information  

Open Energy Info (EERE)

ProjectType ProjectType Jump to: navigation, search Property Name ProjectType Property Type Page Description A descriptive type for a project. This property uses pages as for its values, each of which should describe the type in detail. Pages using the property "ProjectType" Showing 25 pages using this property. (previous 25) (next 25) A Akutan Geothermal Project + Hydrothermal System + Alligator Geothermal Geothermal Project + Hydrothermal System + Alum Geothermal Project + Hydrothermal System + Aurora Geothermal Project + Hydrothermal System + B Bald Mountain Geothermal Project + Hydrothermal System + Baltazor Springs Geothermal Project + Hydrothermal System + Barren Hills Geothermal Project + Hydrothermal System + Black Rock I Geothermal Project + Hydrothermal System +

358

Kolmogorov Complexity, String Information, Panspermia and the Fermi Paradox  

E-Print Network (OSTI)

Bit strings rather than byte files can be a mode of transmission both for intelligent signals and for travels of extraterrestrial life. Kolmogorov complexity, i.e. the minimal length of a binary coded string completely defining a system, can then, due to its universality, become a key concept in the strategy of the search of extraterrestrials. Evaluating, for illustration, the Kolmogorov complexity of the human genome, one comes to an unexpected conclusion that a low complexity compressed string - analog of Noah's ark - will enable the recovery of the totality of terrestrial life. The recognition of bit strings of various complexity up to incompressible Martin-L\\"{o}f random sequences, will require a different strategy for the analysis of the cosmic signals. The Fermi paradox "Where is Everybody?" can be viewed under in the light of such information panspermia, i.e. a Universe full of traveling life streams.

V. G. Gurzadyan

2005-08-01T23:59:59.000Z

359

String Gas Shells, their Dual Radiation and Hedgehog Signature Control  

E-Print Network (OSTI)

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

E. I. Guendelman

2009-03-12T23:59:59.000Z

360

Phenomenological survey of free fermionic heterotic-string models  

E-Print Network (OSTI)

A glossary overview of the phenomenological studies of quasi-realistic free fermionic heterotic string models is presented. I elaborate on the correspondence of these models with Z2XZ2 orbifolds.

Faraggi, Alon E

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "type string pages" 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

Phenomenological survey of free fermionic heterotic-string models  

E-Print Network (OSTI)

A glossary overview of the phenomenological studies of quasi-realistic free fermionic heterotic string models is presented. I elaborate on the correspondence of these models with Z2XZ2 orbifolds.

Alon E. Faraggi

2008-09-16T23:59:59.000Z

362

Efficient Solutions for the Far From Most String Problem  

E-Print Network (OSTI)

Apr 7, 2011 ... Efficient Solutions for the Far From Most String Problem. Paola Festa(paola.festa ***at*** unina.it) Panos M. Pardalos(pardalos ***at*** ufl.edu).

363

Ripples in a string coupled to Glauber spins  

E-Print Network (OSTI)

Each oscillator in a linear chain (a string) interacts with a local Ising spin in contact with a thermal bath. These spins evolve according to Glauber dynamics. Below a critical temperature, there appears an equilibrium, ...

Rosales, Rodolfo R.

364

Three level constraints on conformal field theories and string models  

Science Conference Proceedings (OSTI)

Simple tree level constraints for conformal field theories which follow from the requirement of crossing symmetry of four-point amplitudes are presented, and their utility for probing general properties of string models is briefly illustrated and discussed. 9 refs.

Lewellen, D.C.

1989-05-01T23:59:59.000Z

365

Effective software testing with a string-constraint solver  

E-Print Network (OSTI)

This dissertation presents techniques and tools for improving software reliability, by using an expressive string-constraint solver to make implementation-based testing more effective and more applicable. Concolic testing ...

Kie?un, Adam

2009-01-01T23:59:59.000Z

366

Category:NEPA Environmental Analysis Types | Open Energy Information  

Open Energy Info (EERE)

Environmental Analysis Types Jump to: navigation, search Category:NEPA Environmental Analysis Types Geothermalpower.jpg Looking for the NEPA Environmental Analysis Types page? For...

367

String-corrected dilatonic black holes in d dimensions  

Science Conference Proceedings (OSTI)

We solve the dilaton field equation in the background of a spherically symmetric black hole in bosonic or heterotic string theory with curvature-squared corrections in arbitrary d spacetime dimensions. We then apply this result to obtain a spherically symmetric black hole solution with dilatonic charge and curvature-squared corrections in bosonic or heterotic string theory compactified on a torus. For this black hole, we obtain its free energy, entropy, temperature, specific heat, and mass.

Moura, Filipe [Centro de Matematica da Universidade do Minho, Escola de Ciencias, Campus de Gualtar, 4710-057 Braga (Portugal)

2011-02-15T23:59:59.000Z

368

Iron pages of HTSC  

Science Conference Proceedings (OSTI)

Experimental data are presented on the superconducting and electronic properties of iron-based high-temperature superconductors in the normal and superconducting states. The following topics are discussed: lattice structure; structure of magnetic vortices; magnetic penetration depth; Fermi surface; isotope effect; and critical magnetic fields both in oxide compounds of 1111 type and oxide-free compounds of 122, 111, and 011 types as a function of the doping level, temperature, and external pressure.

Gasparov, V. A., E-mail: vgasparo@issp.ac.r [Russian Academy of Sciences, Institute of Solid State Physics (Russian Federation)

2010-08-15T23:59:59.000Z

369

Basic EETD Web Page Design  

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

Basic EETD Web Page Design Speaker(s): Eve Edelson Date: May 27, 2005 - 12:00pm Location: Bldg. 90 Seminar HostPoint of Contact: Allan Chen This talk will provide information...

370

SSRL Accelerator Phycics Home Page  

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

(29047 bytes) ICFA2000t.gif (31362 bytes) Home Page LCLS Accelerator Physics at SSRL The field tha t can be covered by the Accelerator Physics activities at SSRL is limited...

371

Next Linear Collider Home Page  

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

Welcome to the Next Linear Collider NLC Home Page If you would like to learn about linear colliders in general and about this next-generation linear collider project's mission,...

372

Help:Protected pages | Open Energy Information  

Open Energy Info (EERE)

Protected pages Protected pages Jump to: navigation, search A protected page is a page where normal users are prevented from editing and/or moving at all. Only a user with sysop permissions can edit or move a protected page. Likewise only sysop users can protect a page in the first place, or unprotect the page to lift the restriction. There are several reasons why a particular page might be protected: On public wikis, pages may be protected because they have been repeatedly targeted with vandalism or moved to bad titles, or where it is believed that vandalism or page moves would have a unusually severe impact. On corporate wikis, pages may be protected when they contain statements which have been approved by management, and policy dictates that those statements can't be changed without following a certain approval

373

On tadpoles and vacuum redefinitions in String Theory  

E-Print Network (OSTI)

Tadpoles accompany, in one form or another, all attempts to realize supersymmetry breaking in String Theory, making the present constructions at best incomplete. Whereas these tadpoles are typically large, a closer look at the problem from a perturbative viewpoint has the potential of illuminating at least some of its qualitative features in String Theory. A possible scheme to this effect was proposed long ago by Fischler and Susskind, but incorporating background redefinitions in string amplitudes in a systematic fashion has long proved very difficult. In the first part of this paper, drawing from field theory examples, we thus begin to explore what one can learn by working perturbatively in a ``wrong'' vacuum. While unnatural in Field Theory, this procedure presents evident advantages in String Theory, whose definition in curved backgrounds is mostly beyond reach at the present time. At the field theory level, we also identify and characterize some special choices of vacua where tadpole resummations terminate after a few contributions. In the second part we present a notable example where vacuum redefinitions can be dealt with to some extent at the full string level, providing some evidence for a new link between IIB and 0B orientifolds. We finally show that NS-NS tadpoles do not manifest themselves to lowest order in certain classes of string constructions with broken supersymmetry and parallel branes, including brane-antibrane pairs and brane supersymmetry breaking models, that therefore have UV finite threshold corrections at one loop.

E. Dudas; G. Pradisi; M. Nicolosi; A. Sagnotti

2004-10-09T23:59:59.000Z

374

Black Strings, Black Rings and State-space Manifold  

E-Print Network (OSTI)

State-space geometry is considered, for diverse three and four parameter non-spherical horizon rotating black brane configurations, in string theory and $M$-theory. We have explicitly examined the case of unit Kaluza-Klein momentum $D_1D_5P$ black strings, circular strings, small black rings and black supertubes. An investigation of the state-space pair correlation functions shows that there exist two classes of brane statistical configurations, {\\it viz.}, the first category divulges a degenerate intrinsic equilibrium basis, while the second yields a non-degenerate, curved, intrinsic Riemannian geometry. Specifically, the solutions with finitely many branes expose that the two charged rotating $D_1D_5$ black strings and three charged rotating small black rings consort real degenerate state-space manifolds. Interestingly, arbitrary valued $M_5$-dipole charged rotating circular strings and Maldacena Strominger Witten black rings exhibit non-degenerate, positively curved, comprehensively regular state-space configurations. Furthermore, the state-space geometry of single bubbled rings admits a well-defined, positive definite, everywhere regular and curved intrinsic Riemannian manifold; except for the two finite values of conserved electric charge. We also discuss the implication and potential significance of this work for the physics of black holes in string theory.

Stefano Bellucci; Bhupendra Nath Tiwari

2010-10-19T23:59:59.000Z

375

Cosmic Strings in a Braneworld Theory with Metastable Gravitons  

E-Print Network (OSTI)

If the graviton possesses an arbitrarily small (but nonvanishing) mass, perturbation theory implies that cosmic strings have a nonzero Newtonian potential. Nevertheless in Einstein gravity, where the graviton is strictly massless, the Newtonian potential of a cosmic string vanishes. This discrepancy is an example of the van Dam--Veltman--Zakharov (VDVZ) discontinuity. We present a solution for the metric around a cosmic string in a braneworld theory with a graviton metastable on the brane. This theory possesses those features that yield a VDVZ discontinuity in massive gravity, but nevertheless is generally covariant and classically self-consistent. Although the cosmic string in this theory supports a nontrivial Newtonian potential far from the source, one can recover the Einstein solution in a region near the cosmic string. That latter region grows as the graviton's effective linewidth vanishes (analogous to a vanishing graviton mass), suggesting the lack of a VDVZ discontinuity in this theory. Moreover, the presence of scale dependent structure in the metric may have consequences for the search for cosmic strings through gravitational lensing techniques.

Arthur Lue

2001-11-20T23:59:59.000Z

376

Page not found | Department of Energy  

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

61 - 19670 of 29,416 results. 61 - 19670 of 29,416 results. Rebate Solar Contractor Licensing Nevada law requires that solar energy system installers be licensed by the Nevada State Contractors Board. Contractors may be licensed under License Classification C-37 (solar contracting for solar... http://energy.gov/savings/solar-contractor-licensing-3 Rebate Building Energy Code ''Much of the information presented in this summary is drawn from the U.S. Department of Energy's (DOE) Building Energy Codes Program and the Building Codes Assistance Project (BCAP). For more... http://energy.gov/savings/building-energy-code-23 Page Types of Reuse The following provides greater detail regarding the types of reuse pursued for LM sites. It should be noted that many actual reuses combine several types of the uses listed below.

377

Technical Report Documentation Page 1. Report No.  

E-Print Network (OSTI)

Database (eGRID) #12;Page 2 A calcium chloride solution concentrates (regenerates) while passing over

Texas at Austin, University of

378

Effective criteria for web page changes  

Science Conference Proceedings (OSTI)

A number of similarity metrics have been used to measure the degree of web page changes in the literature. In this paper, we define criteria for web page changes to evaluate the effectiveness of the metrics. Using real web pages and synthesized pages, ...

Shin Young Kwon; Sang Ho Lee; Sung Jin Kim

2006-01-01T23:59:59.000Z

379

Cover Page of Household Vehicles Energy Use: Latest Data & Trends  

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

Household Vehicles Energy Use Cover Page Cover Page of Household Vehicles Energy Use: Latest Data & Trends...

380

What is the maximum rate at which entropy of a string can increase?  

Science Conference Proceedings (OSTI)

According to Susskind, a string falling toward a black hole spreads exponentially over the stretched horizon due to repulsive interactions of the string bits. In this paper such a string is modeled as a self-avoiding walk and the string entropy is found. It is shown that the rate at which information/entropy contained in the string spreads is the maximum rate allowed by quantum theory. The maximum rate at which the black hole entropy can increase when a string falls into a black hole is also discussed.

Ropotenko, Kostyantyn [State Administration of Communications, Ministry of Transport and Communications of Ukraine 22, Khreschatyk, 01001, Kyiv (Ukraine)

2009-03-15T23:59:59.000Z

Note: This page contains sample records for the topic "type string pages" 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

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

E-Print Network (OSTI)

the Sun with the IceCube 22-string detector R. Abbasi, 24 Y.in the Sun with the IceCube 22-string detector The IceCubeperformed with the IceCube 22-string neutrino detector using

Klein, Spencer; IceCube Collaboration

2009-01-01T23:59:59.000Z

382

Three-dimensional scalar field theory model of center vortices and its relation to k-string tensions  

E-Print Network (OSTI)

the ?ux J is, vortex strings always have the same thicknessand its relation to k-string tensions John M. Cornwall 1determination of so-called k-string tensions. This model is

Cornwall, J M

2004-01-01T23:59:59.000Z

383

Proton hexality from an anomalous flavor U(1) and neutrino masses--Linking to the string scale  

E-Print Network (OSTI)

Masses – Linking to the String Scale* Herbi K. Dreiner 1 ,Masses – Linking to the String Scale arXiv:0708.0989v2 [hep-allows the calculation of g string , g X and G SM ’s Ka? -

Dreiner, Herbi K.

2008-01-01T23:59:59.000Z

384

Department of Energy Home Page  

Office of Scientific and Technical Information (OSTI)

US DEPARTMENT OF ENERGY Search Home Page Contents US DEPARTMENT OF ENERGY Search Home Page Contents [ABOUT DOE] About The Department of Energy (Learn about the Department of Energy, its mission, plans, organizational structure, accomplishments and the Secretary of Energy Federico Peña.) [DEPARTMENTAL RESOURCES] Departmental Resources (Look for information across the Department, connect to other Departmental Home Pages, or search for scientific and technical information through such systems as the DOE Information Bridge, containing searchable citations of worldwide energy research as well as bibliographic citations with links to DOE sponsored or acquired full-text reports; EnergyFiles, DOE's virtual library environment containing energy-related STI and tools to facilitate information use in the R&D process; and the DOE Reports Bibliographic

385

Energy of string loops and thermodynamics of dark energy  

Science Conference Proceedings (OSTI)

We discuss the thermodynamic aspects of a simple model of cosmic string loops, whose energy is nonlinearly related to their lengths. We obtain in a direct way an equation of state having the form p=-(1+{alpha}){rho}/3, with {rho} the energy density and 1+{alpha} the exponent which relates the energy u{sub l} of a loop with its length l as u{sub l}{approx}l{sup 1+{alpha}}. In the linear situation ({alpha}=0) one has p=-{rho}/3, in the quadratic one ({alpha}=1) p=-2{rho}/3, and in the cubic case ({alpha}=2) p=-{rho}. For all values of {alpha} the entropy goes as S{approx}(2-{alpha})L{sup 3/2} (L being the string length density). The expression of S is useful to explore the behavior of such string loops under adiabatic expansion of the Universe. Thermodynamic stability suggests that the gas of string loops must coexist with several long strings, longer than the horizon radius.

Jou, D. [Departament de Fisica, Universitat Autonoma de Barcelona, 08193 Bellaterra, Catalonia (Spain); Mongiovi, M. S.; Sciacca, M. [Dipartimento di Metodi e Modelli Matematici, Universita di Palermo, Viale delle Scienze, 90128, Palermo (Italy)

2011-02-15T23:59:59.000Z

386

EMIS Quick User Guide Search page (details on page 2)  

E-Print Network (OSTI)

search terms in foreign languages You can enter search terms in foreign languages by: - Using your: Please note that we have a Cyrillic and Arabic keyboards available through the Search page. Entering. For example, to search for articles published between February 01, 2006 and May 30, 2006 enter the following

Shoubridge, Eric

387

VEMAP Project Page  

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

Regional/Global > Veg-Eco Modeling (VEMAP) Regional/Global > Veg-Eco Modeling (VEMAP) The Vegetation-Ecosystem Modeling and Analysis (VEMAP) Project Overview [VEMAP Logo] The Vegetation/Ecosystem Modeling and Analysis Program (VEMAP) was a multi- institutional, international effort that addressed the response of biogeography and biochemistry to environmental variability in climate and other drivers in both space and time domains. The objectives of VEMAP were to: study the intercomparison of biogeochemistry models and vegetation type distribution (biogeography) models determine model sensitivity to changing climate, elevated atmospheric carbon dioxide concentrations, and other sources of altered forcing The VEMAP project was conducted in two phases. VEMAP Phase 1 was structured as a sensitivity analysis with combinations of

388

V-075: EMC AlphaStor Command Injection and Format String Flaws...  

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

5: EMC AlphaStor Command Injection and Format String Flaws Let Remote Users Execute Arbitrary Code V-075: EMC AlphaStor Command Injection and Format String Flaws Let Remote Users...

389

U-092: Sudo Format String Bug Lets Local Users Gain Elevated...  

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

2: Sudo Format String Bug Lets Local Users Gain Elevated Privileges U-092: Sudo Format String Bug Lets Local Users Gain Elevated Privileges January 31, 2012 - 5:45am Addthis...

390

Superconducting cosmic strings as gamma ray burst engines  

E-Print Network (OSTI)

Cusps of superconducting strings can serve as GRB engines. A powerful beamed pulse of electromagnetic radiation from a cusp produces a jet of accelerated particles, whose propagation is terminated by the shock responsible for GRB. A single free parameter, the string scale of symmetry breaking $\\eta \\sim 10^{14} GeV$, together with reasonable assumptions about the magnitude of cosmic magnetic fields and the fraction of volume that they occupy, explains the GRB rate, duration and fluence, as well as the observed ranges of these quantities. The wiggles on the string can drive the short-time structures of GRB. This model predicts that GRBs are accompanied by strong bursts of gravitational radiation which should be detectable by LIGO, VIRGO and LISA detectors.

V. Berezinsky; B. Hnatyk; A. Vilenkin

2000-01-12T23:59:59.000Z

391

Search for Cosmic Strings in the GOODS Survey  

E-Print Network (OSTI)

We search Hubble Space Telescope Treasury Program images collected as part of the Great Observatories Origins Deep Survey for pairs of galaxies consistent with the gravitational lensing signature of a cosmic string. Our technique includes estimates of the efficiency for finding the lensed galaxy pair. In the north (south) survey field we find no evidence out to a redshift of greater than 0.5 (0.3) for cosmic strings to a mass per unit length limit of $G\\musearches for individual strings in cosmic microwave background (CMB) data. Our limit is higher than other CMB and gravitational wave searches, however, we note that it is less model dependent than these other searches.

J. L. Christiansen; E. Albin; K. A. James; J. Goldman; D. Maruyama; G. F. Smoot

2008-02-29T23:59:59.000Z

392

Black Hole - String Transition and Rolling D-brane  

E-Print Network (OSTI)

We investigate the black hole - string transition in the two-dimensional Lorentzian black hole system from the exact boundary states that describe the rolling D-brane falling down into the two-dimensional black hole. The black hole - string phase transition is one of the fundamental properties of the non-supersymmetric black holes in string theory, and we will reveal the nature of the phase transition from the exactly solvable world-sheet conformal field theory viewpoint. Since the two-dimensional Lorentzian black hole system (SL(2;R)_k/U(1) coset model at level k) typically appears as near-horizon geometries of various singularities such as NS5-branes in string theory, our results can be regarded as the probe of such singularities from the non-supersymmetric probe rolling D-brane. The exact construction of boundary states for the rolling D0-brane falling down into the two-dimensional D-brane enables us to probe the phase transition at k=1 directly in the physical amplitudes. During the study, we uncover three fundamental questions in string theory as a consistent theory of quantum gravity: small charge limit v.s. large charge limit of non-supersymmetric quantum black holes, analyticity v.s. non-analyticity in physical amplitudes and physical observables, and unitarity v.s. open closed duality in time-dependent string backgrounds. This work is based on the PhD thesis submitted to Department of Physics, Faculty of Science, University of Tokyo, which was defended on January 2007.

Yu Nakayama

2007-02-28T23:59:59.000Z

393

Page not found | Department of Energy  

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

41 - 2350 of 26,777 results. 41 - 2350 of 26,777 results. Page Emergency Management Criteria & Review Approach Documents http://energy.gov/hss/emergency-management-criteria-review-approach-documents Page Management Criteria & Review Approach Documents http://energy.gov/hss/management-criteria-review-approach-documents Page Radiation Control Criteria & Review Approach Documents http://energy.gov/hss/radiation-control-criteria-review-approach-documents Page Safety Basis Criteria & Review Approach Documents http://energy.gov/hss/safety-basis-criteria-review-approach-documents Page Training Criteria & Review Approach Documents http://energy.gov/hss/training-criteria-review-approach-documents Page Former Worker Medical Screening Program Related Documents & Links

394

Possible influence of the two string events on the hadron formation in a nuclear environment  

E-Print Network (OSTI)

One of the basic assumptions of the string model is that as a result of a DIS in nucleus a single string arises, which then breaks into hadrons. However the pomeron exchange considered in this work, leads to the production of two strings in the one event. The hadrons produced in these events have smaller formation lengths, than those with the same energy produced in the single string events. As a consequence, they undergo more substantial absorption in the nuclear matter.

N. Akopov; L. Grigoryan; Z. Akopov

2007-05-07T23:59:59.000Z

395

The propagation of a pulse in the real string and rods  

E-Print Network (OSTI)

The elastic string (rod) of a large mass M is considered, the left end of which is fixed to a body of a small mass m. The second body of mass m is fixed to the right end of the string. The force of the delta-function form is applied to the left side of the string. We find the propagation of a pulse in the system. The problem is related to the quark-string model of mesons.

Miroslav Pardy

2005-03-01T23:59:59.000Z

396

Theoretical Research in Cosmology, High-Energy Physics and String Theory  

Science Conference Proceedings (OSTI)

The research was in the area of Theoretical Physics: Cosmology, High-Energy Physics and String Theory

Ng, Y Jack; Dolan, Louise; Mersini-Houghton, Laura; Frampton, Paul

2013-07-29T23:59:59.000Z

397

Recognition driven page orientation detection  

Science Conference Proceedings (OSTI)

In document image recognition, orientation detection of the scanned page is necessary for the following procedures to work correctly as they assume that the text is well oriented. Several methods have been proposed, but most of them rely on heuristics ... Keywords: document image processing, image orientation analysis, optical character recognition

Yves Rangoni; Faisal Shafait; Joost Van Beusekom; Thomas M. Breuel

2009-11-01T23:59:59.000Z

398

(continued on page 4) Introduction  

E-Print Network (OSTI)

Survey (USGS). Two separate film formats were acquired, including black-and-white aerial photography Survey The tradition of systematic collection of federal aerial photography has been maintained(continued on page 4) Introduction First-time statewide coverage of vertical aerial photography

Frank, Thomas D.

399

Dimensional reduction of 4d heterotic string black holes  

E-Print Network (OSTI)

We perform the spherical symmetric dimensional reduction $4d\\to2d$ of heterotic string theory. We find a class of two-dimensional (2d) dilaton gravity models that gives a general description of the near-horizon, near-extremal behavior of four-dimensional (4d) heterotic string black holes. We show that the duality group of the 4d theory is realized in two dimensions in terms of Weyl transformations of the metric. We use the 2d dilaton gravity theory to compute the statistical entropy of the near-extremal 4d, $a=1/\\sqrt3$, black hole.

Mariano Cadoni

1999-04-02T23:59:59.000Z

400

The issue of Dark Energy in String Theory  

E-Print Network (OSTI)

Recent astrophysical observations, pertaining to either high-redshift supernovae or cosmic microwave background temperature fluctuations, as those measured recently by the WMAP satellite, provide us with data of unprecedented accuracy, pointing towards two (related) facts: (i) our Universe is accelerated at present, and (ii) more than 70 % of its energy content consists of an unknown substance, termed dark energy, which is believed responsible for its current acceleration. Both of these facts are a challenge to String theory. In this review I outline briefly the challenges, the problems and possible avenues for research towards a resolution of the Dark Energy issue in string theory.

Nick E. Mavromatos

2006-07-01T23:59:59.000Z

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


401

Molecular quantum mechanical observers, symmetry, and string theory  

E-Print Network (OSTI)

The paper \\cite{Dance0601} tentatively suggested a physical picture that might underlie string theories. The string parameters $\\tau $ and $\\sigma_i $ were interpreted as spacetime dimensions which a simple quantum mechanical observer can observe, while symmetries of the relevant observer states could limit the observability of other dimensions. An atomic observer was the focus of the discussion. The present paper extends the discussion of\\cite{Dance0601} to molecular observers, including the nature of some common molecular bonds and their symmetries.

M. Dance

2010-11-29T23:59:59.000Z

402

Local stabilizer codes in three dimensions without string logical operators  

Science Conference Proceedings (OSTI)

We suggest concrete models for self-correcting quantum memory by reporting examples of local stabilizer codes in 3D that have no string logical operators. Previously known local stabilizer codes in 3D all have stringlike logical operators, which make the codes non-self-correcting. We introduce a notion of ''logical string segments'' to avoid difficulties in defining one-dimensional objects in discrete lattices. We prove that every stringlike logical operator of our code can be deformed to a disjoint union of short segments, each of which is in the stabilizer group. The code has surfacelike logical operators whose partial implementation has unsatisfied stabilizers along its boundary.

Haah, Jeongwan [Institute for Quantum Information, California Institute of Technology, Pasadena, California 91125 (United States)

2011-04-15T23:59:59.000Z

403

Anomalous Soft Photons Associated with Hadron Production in String Fragmentation  

Science Conference Proceedings (OSTI)

The bosonized QCD2+QED2 system for quarks with two flavors contains QCD2 and QED2 bound states, with an isoscalar photon at about 25 MeV and an isovector (I=1 J_{3}=0) photon at about 44 MeV. Consequently, when a quark and antiquark at the two ends of a string pulls apart from each other at high energies, hadrons and soft photons will be produced simultaneously in the fragmentation of the string. The production of the QED2 soft photons in association with hadrons may explain the anomalous soft photon data in hadron-hadron collisions and e^{+}-e^{-} annihilations at high energies.

Wong, Cheuk-Yin [ORNL

2011-01-01T23:59:59.000Z

404

Purely twistorial string with canonical twistor field quantization  

SciTech Connect

We introduce new purely twistorial scale-invariant action describing the composite bosonic D=4 Nambu-Goto string with target space parametrized by the pair of D=4 twistors. We show that by suitable gauge fixing of local scaling one gets the bilinear twistorial action and canonical quantization rules for the two-dimensional twistor-string fields. We consider the Poisson brackets of all constraints characterizing our model and we obtain four first class constraints describing two Virasoro constraints and two Kac-Moody local phase transformations.

Fedoruk, Sergey [Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna, Moscow Region (Russian Federation); Lukierski, Jerzy [Institute for Theoretical Physics, University of Wroclaw, plac Maxa Borna 9, 50-204 Wroclaw (Poland)

2009-03-15T23:59:59.000Z

405

Generalized dilaton-Maxwell cosmic string and wall solutions  

E-Print Network (OSTI)

The class of static solutions found by Gibbons and Wells for dilaton-electrodynamics in flat spacetime, which describe nontopological strings and walls that trap magnetic flux, is extended to a class of dynamical solutions supporting arbitrarily large, nondissipative traveling waves, using techniques previously applied to global and local topological defects. These solutions can then be used in conjunction with S-duality to obtain more general solitonic solutions for various axidilaton-Maxwell theories. As an example, a set of dynamical solutions is found for axion, dilaton, and Maxwell fields in low energy heterotic string theory using the SL(2,R) invariance of the equations of motion.

John Morris

2006-08-15T23:59:59.000Z

406

Black holes and black strings in plane waves  

E-Print Network (OSTI)

We investigate the construction of black holes and black strings in vacuum plane wave spacetimes using the method of matched asymptotic expansions. We find solutions of the linearised equations of motion in the asymptotic region for a general source on a plane wave background. We observe that these solutions do not satisfy our previously defined conditions for being asymptotically plane wave. We consider the solution in the near region, treating the plane wave as a perturbation of a black object, and find that there is a regular black string solution but no regular black hole solution.

Witt, Julian Le

2009-01-01T23:59:59.000Z

407

Equivalence of string and fusion loop-spin structures  

E-Print Network (OSTI)

The importance of the fusion relation of loops was recognized in the context of spin structures on the loop space by Stolz and Teichner and further developed by Waldorf. On a spin manifold M the equivalence classes of `fusive' spin structures on the loop space LM, incorporating the fusion property, strong regularity and reparameterization-invariance, are shown to be in 1-1 correspondence with equivalence classes of string structures on M. The identification is through the affine space of `string' cohomology classes considered by Redden.

Chris Kottke; Richard Melrose

2013-09-01T23:59:59.000Z

408

Further results about field theory on the world sheet and string formation  

E-Print Network (OSTI)

O n The W o r l d Sheet A n d String Formation K o r k u tthe model has two phases: A string forming phase and acan be thought of as the string slope, which is now promoted

Bardakci, Korbut

2005-01-01T23:59:59.000Z

409

JOURNAL DE PHYSIQUE Colloque C4, supplment au n 4, Tome 40, avril 1979, page C4-77 Shake-up satellites in the U4f E.S.C.A. spectra of NaCl-type uranium  

E-Print Network (OSTI)

-up satellites in the U4f E.S.C.A. spectra of NaCl-type uranium monocompounds: UN, UP, UAs and US E. Thibaut quatre composés d'uranium, tous de structure NaCl, sont décrits et discutés en vue d'une approche du caractère de la liaison chimique. Abstract. -- The U4f E.S.C.A. spectra of four NaCl-type uranium

Paris-Sud XI, Université de

410

Pages that link to "Biofuel Solutions" | Open Energy Information  

Open Energy Info (EERE)

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411

Pages that link to "Crouch, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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412

Pages that link to "Aberdeen, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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413

Pages that link to "Bonners Ferry, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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414

Pages that link to "Caldwell, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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415

Pages that link to "Blackfoot, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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416

Pages that link to "Arco, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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417

Pages that link to "Camas County, Idaho" | Open Energy Information  

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418

Pages that link to "Banks, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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419

Pages that link to "Arbon Valley, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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420

Pages that link to "American Falls, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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421

Pages that link to "Arimo, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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422

Pages that link to "Bonner County, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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423

Pages that link to "Ashton, Idaho" | Open Energy Information  

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424

Pages that link to "Cascade, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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425

Pages that link to "Basalt, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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426

Pages that link to "Clayton, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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427

Pages that link to "Idaho Wind Energy" | Open Energy Information  

Open Energy Info (EERE)

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428

Pages that link to "Athol, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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429

Pages that link to "Ammon, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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430

Pages that link to "Atomic City, Idaho" | Open Energy Information  

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431

Pages that link to "Chubbuck, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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432

Pages that link to "Council, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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433

Pages that link to "Albion, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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434

Pages that link to "Clearwater County, Idaho" | Open Energy Informatio...  

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435

Pages that link to "Castleford, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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436

Pages that link to "Carey, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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437

Pages that link to "Bliss, Idaho" | Open Energy Information  

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438

Pages that link to "Clark County, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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439

Pages that link to "Challis, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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440

Pages that link to "Bloomington, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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441

Pages that link to "Bovill, Idaho" | Open Energy Information  

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442

Pages that link to "Burley, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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443

Pages that link to "Bellevue, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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444

Pages that link to "Bruneau, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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445

Pages that link to "Cambridge, Idaho" | Open Energy Information  

Open Energy Info (EERE)

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446

Pages that link to "Bancroft, Idaho" | Open Energy Information  

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447

Pages that link to "Almo, Idaho" | Open Energy Information  

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448

Pages that link to "Qinghai Lighting Ltd" | Open Energy Information  

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449

Pages that link to "Ningbo Liaoyuan Lighting Co" | Open Energy...  

Open Energy Info (EERE)

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450

Pages that link to "Solar lighting" | Open Energy Information  

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451

Pages that link to "Hydrogen Energy Data Book" | Open Energy...  

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452

Pages that link to "Geothermal/Environment" | Open Energy Information  

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453

Pages that link to "Coal Mining (Iowa)" | Open Energy Information  

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454

Pages that link to "Boardman, Oregon" | Open Energy Information  

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455

Pages that link to "Boardman, Ohio" | Open Energy Information  

Open Energy Info (EERE)

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456

Pages that link to "Bioethanol Limited" | Open Energy Information  

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457

Pages that link to "Energy Savings Store" | Open Energy Information  

Open Energy Info (EERE)

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458

Winter 2001 LInC Home Page  

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

and Folder Naming Guidelines (TS 80) Configuring your Web Editor (TS 75) Web Editor Animations (Dreamweaver, Composer, FrontPage, PageMill) Staff Development Plan LInC Partnership...

459

EERE: Fuel Cell Technologies Office Home Page  

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

Office Printable Version Share this resource Send a link to EERE: Fuel Cell Technologies Office Home Page to someone by E-mail Share EERE: Fuel Cell Technologies Office Home Page...

460

EERE: Building Technologies Office Home Page  

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

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461

Page 1 of 30 ANNUAL SECURITY  

E-Print Network (OSTI)

Page 1 of 30 ANNUAL SECURITY AND FIRE SAFETY REPORT SEPTEMBER 2009 DARTMOUTH COLLEGE #12;Page 2 .....................................................................................................................................4 Message from the Director of Safety and Security.....................................................................................................................4 Safety & Security at Dartmouth College

Myers, Lawrence C.

462

Category:Hydrodynamic Testing Facility Type | Open Energy Information  

Open Energy Info (EERE)

Hydrodynamic Testing Facility Type Jump to: navigation, search This page contains all of the various types of technologies used in Hydrodynamic Testing Facilities for testing new...

463

Property:OpenEI/PageDescription | Open Energy Information  

Open Energy Info (EERE)

PageDescription PageDescription Jump to: navigation, search This is a property of type Text. Pages using the property "OpenEI/PageDescription" Showing 25 pages using this property. (previous 25) (next 25) 1 1 Solar Inc + 1-Solar Inc: energy company profile. 10Charge Inc + 10Charge Inc: energy company profile. 11th Annual Workshop on Greenhouse Gas Emission Trading + "The IEA-IETA-EPRI Emissions Trading Workshop has been held annually at the headquarters of the International Energy Agency since 2000. This international workshop focuses on developments in greenhouse gas (GHG) emissions trading around the world at the international, national and sub-national level. The 2011 workshop will cover topics relevant to the development of global, national and sub-national carbon markets, including scaled-up and new market mechanisms, NAMAs and sectoral crediting policies, MRV and international GHG accounting and 2nd-best trading programmes. As in previous years, the workshop will assemble representatives from government, business and independent research organisations to discuss advances in various national GHG markets, as well as the future of carbon trading and the "shuffle" to the COP 17 meeting in Durban."

464

Page not found | Department of Energy  

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

Reporting Trends Occurrence Reporting and Processing of Operations Information (ORPS): Five Year Trends http:energy.govhssdownloadsoccurrence-reporting-trends Page...

465

Page not found | Department of Energy  

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

2008transitionbudgetdetailsbookfourpdf Page Plans, Implementation, and Results Glossary Definitions of the office overview, plans, implementation, and results document and...

466

Page not found | Department of Energy  

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

http:energy.govnedownloadsneams-quarterly-report-july-september-2012 Page Presidential Permits and Export Authorizations - Frequently Asked Questions Presidential...

467

Page not found | Department of Energy  

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

http:energy.govsavingscps-energy-commercial-energy-efficiency-rebates Page Presidential Permits and Export Authorizations - Frequently Asked Questions Presidential...

468

Page not found | Department of Energy  

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

tricity-policy-coordination-and-implementationinternational-electricity-regulatio-7 Page Presidential Permits and Export Authorizations - About the Program The Federal...

469

Page not found | Department of Energy  

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

http:energy.govnepadownloadscx-010554-categorical-exclusion-determination Page Presidential Permits and Export Authorizations - Frequently Asked Questions Presidential...

470

Page not found | Department of Energy  

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

http:energy.govnepadownloadscx-010165-categorical-exclusion-determination Page Asset Revitalization Initiative http:energy.govariasset-revitalization-initiative...

471

Page not found | Department of Energy  

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

to Smart Grid Implementation http:energy.govoedownloadscomments-national-rural-electric-cooperative-association-request-information-addressing Page Topic A" Awardee:...

472

Page not found | Department of Energy  

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

Page Other Regulatory Efforts In addition to regulating international electricity trade, the Office of Electricity Delivery and Energy Reliability participates...

473

News page discovery policy for instant crawlers  

Science Conference Proceedings (OSTI)

Many news pages which are of high freshness requirements are published on the internet every day. They should be downloaded immediately by instant crawlers. Otherwise, they will become outdated soon. In the past, instant crawlers only downloaded pages ... Keywords: news page discovery, user behavior analysis, web log

Yong Wang; Yiqun Liu; Min Zhang; Shaoping Ma

2008-01-01T23:59:59.000Z

474

Page 1 of 22 Building Num: Date  

E-Print Network (OSTI)

Check List Page 1 of 22 Building Num: Date: Compressed Gases/WeldingChecklist Title: Action stored away from flammable materials? 1910.252(a)(2)(i) #12;Check List Page 2 of 22 Building Num: Date)(D) Is the insulation material intact on welding machine rod holders? 1910.254(d)(9)(i) #12;Check List Page 3 of 22

Homes, Christopher C.

475

T-duality Invariant Approaches to String Theory  

E-Print Network (OSTI)

This thesis investigates the quantum properties of T-duality invariant formalisms of String Theory. We introduce and review duality invariant formalisms of String Theory including the Doubled Formalism. We calculate the background field equations for the Doubled Formalism of Abelian T-duality and show how they are consistent with those of a conventional String Theory description of a toroidal compactification. We generalise these considerations to the case of Poisson--Lie T-duality and show that the system of renormalisation group equations obtained from the duality invariant parent theory are equivalent to those of either of the T-dual pair of sigma-models. In duality invariant formalisms it is quite common to loose manifest Lorentz invariance at the level of the Lagrangian. The lack of manifest invariance means that at the quantum level one might anticipate Lorentz anomalies and we show that such anomalies cancel non-trivially. These represent important and non-trivial consistency checks of the duality invariant approach to String Theory.

Daniel C. Thompson

2010-12-20T23:59:59.000Z

476

Effective string theory description of the interface free energy  

E-Print Network (OSTI)

We compare the predictions of the Nambu-Goto effective string model with a set of high precision Monte Carlo results for interfaces with periodic boundary conditions in the 3D Ising model. We compute the free energy in the covariant gauge exactly, up to the inclusion of the Liouville mode. The perturbative expansion of this result agrees both with the result evaluated several years ago by Dietz and Filk in the physical gauge and with a recent calculation with the Polchinski-Strominger action. We also derive the effective string spectrum which, because of the different boundary conditions, is very different from the well known one of Arvis. Taking into proper account the effective string corrections and exploiting some technical improvements in the simulations we obtain precise estimate of the amplitude ratios T_c/\\sqrt{sigma}, m_{0++}/\\sqrt{\\sigma} and sigma xi_{2nd}^2. We also discuss the behaviour of the effective string free energy in the dimensional reduction limit (i.e., near the deconfinement transition of the dual 3d gauge Ising model) and its relationship with the 2d Ising model interfaces

M. Billo; M. Caselle; L. Ferro; M. Hasenbusch; M. Panero

2007-10-09T23:59:59.000Z

477

Four-Qubit Entanglement Classification from String Theory  

Science Conference Proceedings (OSTI)

We invoke the black-hole-qubit correspondence to derive the classification of four-qubit entanglement. The U-duality orbits resulting from timelike reduction of string theory from D=4 to D=3 yield 31 entanglement families, which reduce to nine up to permutation of the four qubits.

Borsten, L.; Dahanayake, D.; Duff, M. J.; Rubens, W. [Theoretical Physics, Blackett Laboratory, Imperial College London, London SW7 2AZ (United Kingdom); Marrani, A. [Stanford Institute for Theoretical Physics, Stanford University, Stanford, California 94305-4060 (United States)

2010-09-03T23:59:59.000Z

478

Hadron potentials within the gauge/string correspondence  

Science Conference Proceedings (OSTI)

It is known, since the 70s, that the large N 't Hooft limit of gauge theories is related to string theories. In 1998, J. M. Maldacena identified precisely such a relation: the so-called AdS/CFT correspondence which speculates a duality between a large N strongly-coupled supersymmetric and conformal Yang-Mills theory in four dimensions and a weakly-coupled string theory defined in a five-dimensional anti-de Sitter AdS{sub 5} space-time. This review aims at introducing concepts and methods used to derive, in the framework of the gauge/string correspondence, the interaction potentials of mesons and baryons at zero and finite temperature. The dual string configurations associated with the different kinds of hadrons are described and their behaviours at short and large distances are understood. Although the application of Maldacena's AdS/CFT conjecture to QCD is not straightforward, QCD being neither supersymmetric nor conformal, the AdS/QCD correspondence approach attempts to identify the dual theory of QCD. Especially, the study of heavy quark-antiquark bound-states leads to establish general dual criteria for the confinement.

Jugeau, Frederic, E-mail: jugeau@ihep.ac.c [Institute of High Energy Physics, Chinese Academy of Sciences, P. O. Box 918(4), Beijing 100049 (China); Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049 (China)

2010-08-15T23:59:59.000Z

479

Parabosonic string and space-time non-commutativity  

Science Conference Proceedings (OSTI)

We investigate the para-quantum extension of the bosonic strings in a non-commutative space-time. We calculate the trilinear relations between the mass-center variables and the modes and we derive the Virasoro algebra where a new anomaly term due to the non-commutativity is obtained.

Seridi, M. A.; Belaloui, N. [Laboratoire de Physique Mathematique et Subatomique, Universite Mentouri Constantine (Algeria)

2012-06-27T23:59:59.000Z

480

Proton stability and light Z' inspired by string derived models  

Science Conference Proceedings (OSTI)

Proton stability is one of the most perplexing puzzles in particle physics. While the renormalizable standard model forbids proton decay mediating operators due to accidental global symmetries, many of its extensions introduce such dimension four, five and six operators. Furthermore, it is, in general, expected that quantum gravity only respects local gauge, or discreet, symmetries. String theory provides the arena to study particle physics in a consistent framework of perturbative quantum gravity. An appealing proposition, in this context, is that the dangerous operators are suppressed by an Abelian gauge symmetry, which is broken near the TeV scale. A viable U(1) symmetry should also be anomaly free, be family universal, and allow the generation of fermion masses via the Higgs mechanism. We discuss such U(1) symmetries that arise in quasirealistic free fermionic heterotic-string derived models. Ensuring that the U(1) symmetry is anomaly free at the low scale requires that the standard model spectrum is augmented by additional states that are compatible with the charge assignments in the string models. We construct such string-inspired models and discuss some of their phenomenological implications.

Faraggi, Alon E.; Mehta, Viraf M. [Department of Mathematical Sciences, University of Liverpool, Liverpool, L69 7ZL (United Kingdom)

2011-10-15T23:59:59.000Z

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481

String structures and trivialisations of a Pfaffian line bundle.  

E-Print Network (OSTI)

The present paper is a contribution to categorial index theory. Its main result is the calculation of the Pfaffian line bundle of a certain family of real Dirac operators as an object in the category of line bundles. Furthermore, it is shown how string structures give rise to trivialisations of that Pfaffian.

Ulrich Bunke

482

String-Like Lagrangians from a Generalized Geometry  

E-Print Network (OSTI)

This note will use Hitchin's generalized geometry and a model of axionic gravity developed by Warren Siegel in the mid-nineties to show that the construction of Lagrangians based on the inner product arising from the pairing of a vector and its dual can lead naturally to the low-energy Lagrangian of the bosonic string.

Stephen Morris

2007-10-03T23:59:59.000Z

483

Renewal theory in analysis of tries and strings  

E-Print Network (OSTI)

We give a survey of a number of simple applications of renewal theory to problems on random strings and tries: insertion depth, size, insertion mode and imbalance of tries; variations for b-tries and Patricia tries; Khodak and Tunstall codes.

Janson, Svante

2009-01-01T23:59:59.000Z

484

Analytic Approaches to the Study of Small Scale Structure on Cosmic String Networks  

E-Print Network (OSTI)

We present an analytic model specifically designed to address the long standing issue of small scale structure on cosmic string networks. The model is derived from the microscopic string equations, together with a few motivated assumptions. The resulting form of the correlation between two points on a string is exploited to study smoothing by gravitational radiation, loop formation and lensing by cosmic strings. In addition, the properties of the small loop population and the possibility of detecting gravitational waves generated by their lowest harmonics are investigated. Whenever possible, we compare the predictions of the model to the most recent numerical simulations of cosmic string networks.

Jorge V. Rocha

2008-12-20T23:59:59.000Z

485

Classical worldsheets for string scattering on flat and AdS spacetime  

Science Conference Proceedings (OSTI)

We present a study of the worldsheets that describe the classical limit of various string scattering processes. Our main focus is on string scattering in AdS spacetime because of its relation via the AdS/CFT (anti-de Sitter/conformal field theory) correspondence to gluon scattering in N=4 supersymmetric Yang-Mills theory. But we also consider analogous processes in flat Minkowski spacetime which we compare to the AdS case. In addition to scattering of string by string we also find and study worldsheets describing the scattering of a string by external sources.

Sommerfield, Charles M.; Thorn, Charles B. [Institute for Fundamental Theory, Department of Physics, University of Florida, Gainesville Florida 32611 (United States)

2008-08-15T23:59:59.000Z

486

Status of Some Exact Results on Conformally Invariant Effective String Theories  

Science Conference Proceedings (OSTI)

Numerical studies of Flux Tubes in d = 3,4 QCD and the strong evidence thereby for them being described by free Bosonic String theory to order R{sup -}3, where R is the string length, will be briefly reviewed. The Polchinski-Strominger Effective String Theory approach and our recent work in constructing them to all orders will then be described. A proof will be presented that to all orders these theories have the same spectrum as free Bosonic String Theory. I will conclude my attempts to compliment these results on the basis of canonical QFT and the implications for QCD-Strings.

Dass, N. D. Hari [Centre for High Energy Physics, Indian Institute of Science, Bangalore 560012 (India)

2011-05-23T23:59:59.000Z

487

Study of highly-excited string states at the Large Hadron Collider  

E-Print Network (OSTI)

In TeV-scale gravity scenarios with large extra dimensions, black holes may be produced at future colliders. Good arguments have been made for why general relativistic black holes may be just out of reach of the Large Hadron Collider (LHC). However, in weakly-coupled string theory, highly excited string states - string balls - could be produced at the LHC with high rates and decay thermally, not unlike general relativistic black holes. In this paper, we simulate and study string ball production and decay at the LHC. We specifically emphasize the experimentally-detectable similarities and differences between string balls and general relativistic black holes at a TeV scale.

Douglas M. Gingrich; Kevin Martell

2008-08-19T23:59:59.000Z

488

Janie Page resume 2013 (1)  

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

2010 - present 2010 - present Science/Engineering Associate Project lead: Small Commercial Demand Response study, Home Area Network concept review, Smart Meter electromagnetic field studies for Michigan Public Utilities Commission, Demand response studies for Navy, Demand response in areas impacted by SONGS outage, Coordinated Rooftop Unit study (with PNNL and ORNL) Publications Levy, R., J. Page, C. P. McParland, C. Goldman, M. A. Piette, Assessing Options to Achieve Customer Data Access and Smart Grid Functionality in Home Area Networks. DOE/CEC/LBNL 2013 R. Levy and J. Page, Review of the January 13, 2012 County of Santa Cruz Health Services Agency memorandum: Health Risks Associated with Smart Meters, submitted to Michigan Public Service Commission, April 2012

489

DuPage County, Illinois: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

DuPage County, Illinois: Energy Resources DuPage County, Illinois: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 41.8243831°, -88.0900762° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":41.8243831,"lon":-88.0900762,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

490

Induced vacuum current and magnetic field in the background of a cosmic string  

E-Print Network (OSTI)

Vacuum polarization effects in the cosmic string background are considered. We find that a current is induced in the vacuum of the quantized massive scalar field and that the current circulates around the string which is generalized to a $(d-2)$-brane in locally flat $(d+1)$-dimensional space-time. As a consequence of the Maxwell equation, a magnetic field strength is also induced in the vacuum and is directed along the cosmic string. The dependence of the current and the field strength on the string flux and tension is comprehensively analyzed. Both the current and the field strength are holomorphic functions of the space dimension, decreasing exponentially with the distance from the string. In the case of $d=3$ we show that, due to the vacuum polarization, the cosmic string is enclosed in a tube of the magnetic flux lines if the mass of the quantized field is less than the inverse of the transverse size of the string core.

Yu. A. Sitenko; N. D. Vlasii

2009-09-02T23:59:59.000Z

491

Conformal SO(2,4) Transformations for the Helical AdS String Solution  

E-Print Network (OSTI)

By applying the conformal SO(2,4) transformations to the folded rotating string configuration with two spins given by a certain limit from the helical string solution in AdS_3 x S^1, we construct new string solutions whose energy-spin relations are characterized by the boost parameter. When two SO(2,4) transformations are performed with two boost parameters suitably chosen, the straight folded rotating string solution with one spin in AdS_3 is transformed in the long string limit into the long spiky string solution whose expression is given from the helical string solution in AdS_3 by making a limit that the modulus parameter becomes unity.

Ryang, Shijong

2008-01-01T23:59:59.000Z

492

Page not found | Department of Energy  

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

21 - 17530 of 28,560 results. 21 - 17530 of 28,560 results. Page EIS-0229: Storage and Disposition of Weapons-Usable Fissile Materials The EIS will evaluate the reasonable alternatives and potential environmental impacts for the proposed siting, construction, and operation of three types of facilities for plutonium disposition. http://energy.gov/nepa/eis-0229-storage-and-disposition-weapons-usable-fissile-materials Download Letter of Direction to Contractor The Department of Energy has issued a revised Disposal Authorization Statement (DAS) for the Savannah River Site Saltstone Disposal Facility (SDF), and authorizes the required start-up testing... http://energy.gov/em/downloads/letter-direction-contractor Download Terms and Conditions for EM Clean Up to the Office of Science This document outlines the terms and conditions for managing and funding

493

Page not found | Department of Energy  

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

11 - 11220 of 31,917 results. 11 - 11220 of 31,917 results. Page Inviroment PlasTek(tm) is patent-pending technology created by Inviroment(tm) that facilitates the biodegradation of all types of plastic found in landfills. PlasTek(tm) is sprayed onto waste as it enters a landfill and begins to decompose any plastic it touches, resulting in additional landfill capacity. It also accelerates methane output from plastics, which can be collected from landfills as a source of clean energy. http://energy.gov/national-clean-energy-business-plan-competition-2013/inviroment Article Fossil Energy Announces Addition of Two Key Staff Members The Department of Energy's Office of Fossil Energy today announced the recent appointment of two key senior staff members to the Office of Fossil Energy - Julio Friedmann, Deputy Assistant Secretary for Clean Coal, and

494

Page not found | Department of Energy  

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

721 - 730 of 9,640 results. 721 - 730 of 9,640 results. Download PARS II Training Schedule http://energy.gov/management/downloads/pars-ii-training-schedule Download CX-000849: Categorical Exclusion Determination 25A4083 - Shewanella as an Ideal Platform for Producing Hydrocarbon Biofuels CX(s) Applied: B3.6 Date: 01/19/2010 Location(s): Minnesota Office(s): Advanced Research Projects Agency - Energy http://energy.gov/nepa/downloads/cx-000849-categorical-exclusion-determination Article Incandescent Lighting Incandescent lighting is the most common, and least energy efficient, type of lighting used in homes. http://energy.gov/energysaver/articles/incandescent-lighting Page News http://energy.gov/em/news Download CX-009902: Categorical Exclusion Determination Agrivida - Conditionally Activated Enzymes Expressed in Cellulosic Energy

495

Page not found | Department of Energy  

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

61 - 28070 of 31,917 results. 61 - 28070 of 31,917 results. Article Energy 101 | Algae-to-Fuel A behind-the-scenes video of how oil from algae is extracted and refined to create clean, renewable transportation fuel. http://energy.gov/articles/energy-101-algae-fuel Page Alternative Dispute Resolution The Office of Conflict Prevention and Resolution (formerly the Office of Dispute Resolution) provides assistance throughout the Department and to its contractors on using various types of... http://energy.gov/oha/services/applications-exceptions/alternative-dispute-resolution Event DOE Alaska Native Village Renewable Energy Workshop The Department of Energy Office of Indian Energy Policy and Programs and Office of Energy Efficiency and Renewable Energy Tribal Energy Program are offering a 2-day workshop for Alaska Native...

496

Page not found | Department of Energy  

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

51 - 8660 of 28,905 results. 51 - 8660 of 28,905 results. Page Ex Parte Communications Ex Parte Communication Guidance http://energy.gov/gc/services/open-government/ex-parte-communications Download Reference Buildings by Climate Zone and Representative City: 3B Los Angeles, California In addition to the ZIP file for each building type, you can directly view the "scorecard" spreadsheet that summarizes the inputs and results for each location. This Microsoft Excel spreadsheet is also included in the ZIP file. For version 1.4, only the IDF file is included. http://energy.gov/eere/downloads/reference-buildings-climate-zone-and-representative-city-3b-los-angeles-california Download EA-1885: Draft Environmental Assessment Boston Architectural College's (BAC) Urban Sustainability Initiative for

497

Page  

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

4 4 Θ c (3100) 0 I (J P ) = 0(? ? ) OMITTED FROM SUMMARY TABLE AKTAS 04A in e ± p reactions at c.m. energies of 300 and 320 GeV NODE=B154 sees the peak in D ∗ (2010) - p and D ∗ (2010) + p mass spectra. The minimum quark content would be u u d d c. However: * SCHAEL 04 in a search in D - p and D ∗- p (and charge conjugate) events from 3.5M Z decays sees no evidence for the peak. * CHEKANOV 04D finds no evidence in D ∗- p (and charge-conjugate) events with more than 60,000 re- constructed D ∗± mesons. * LINK 05D finds no evidence in D - p and D ∗- p (and charge-conjugate) events in a cleaner and 30 times larger sample than that of AKTAS 04A. * AUBERT,B 06I finds no evidence in 125,000 D ∗- p (and charge-conjugate) events produced in e + e - reactions at 10.58 GeV. * DELELLIS 07 finds no evidence in 2262 ν emulsion charged-current events. (This is actually a search for a Θ c below the D - p threshold, not for the Θ c (3100).)

498

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

2 2 The Diversity Plan guidance provided in Chapter 12 of the Reference Book for Contract Administrators establi:;hes procedural requirements associated with DEAR Clause 970.5226-1, Diversity Plan, which :lS a required clause in all Management m1d Operation (M&O) contracts and provides guidance in the elements and factors to consider in evaluating the contractor's performance against all approved plan. The guidance acts as an assessment tool, linking the Diversity Plan's goal t) obtain contractor commitment to diversity sensitivity and inclusion in all aspects of its business practices, the workplace, and relations with the community at large.)with performed outcome. In addition, Chapter 12 is updated to Questions concerning this Flash should be directed to Denise P. Wright on (202) 586-6217 or via

499

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

2 2 Θ(1540) + I (J P ) = 0(? ? ) OMITTED FROM SUMMARY TABLE A REVIEW GOES HERE - Check our WWW List of Reviews NODE=B152 Θ(1540) + MASS Θ(1540) + MASS Θ(1540) + MASS Θ(1540) + MASS NODE=B152205 The note below, from the 2006 Review, lists 10 papers on searches for NODE=B152205 the Θ(1540) with negative results. Since then, there have been six more such papers (four of them from the CLAS experiment): AKTAS 06B, DEVITA 06, KUBAROVSKY 06, LINK 06C, MCKINNON 06, and NIC- COLAI 06. Two other papers, MIWA 06 and PANZARASA 06, did find a peak at about the right mass, but only at the 2.5-to-2.7 standard deviation level. We will summarize all these results in a table in the 2008 Review. Since our 2004 edition, there have been several new claimed sightings of the Θ(1540) + (see entries below marked with bars to the right), but there have also been several searches with negative results: * ANTIPOV 04 (SPHINX Collab.)

500

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

3 3 The follo\\ing item is available via the internet at htm:/ /WWVI .arnet.gov /far/facsframe.html Effective Date: February 24, 2004 Special Emergency Procurement Authority (FAR Case 2003-022) This interim rule amends FAR parts 2, Definition of Words and Tenns, 10, Market Research, 12, Acquisition of Commercial Items, 13, Simplified Acquisition Procedures, 15, Contracting by Negotiation, 19, Small Business Programs, and 25. Foreign Acquisition. The rule- ~ Increases the micro-purchase threshold from $2,500 to $ 15,000, except for construction, for acquisitions of supplies or services that the head of the agency has determined to be used to support a contingency operation or to facilitate defense against or recovery from nuclear, biological, chemical. or radiological attack;