IMAGING WITH DIFFUSE PHOTON DENSITY WAVES Maureen A. O'Leary
IMAGING WITH DIFFUSE PHOTON DENSITY WAVES Maureen A. O'Leary A DISSERTATION in PHYSICS Presented Chairperson #12;COPYRIGHT Maureen Ann O'Leary 1996 #12;DEDICATION This work is dedicated to Mom, Dad, Terry v without David's support. #12;ABSTRACT IMAGING WITH DIFFUSE PHOTON DENSITY WAVES Maureen A. O'Leary
Rebecca Bortz Marguerite Klein
Shen, Jun
and probiotics, to improve the integrity of products used in dietary supplement research. Ms. Klein retires after
The KLEIN -paradox Werner Schosser
in a conventional semiconductor (from [2]) Electronic states in graphene (from [2]) - chemical potential - velocity for nonchiral semiconductor even though the dispersion for both bilayer graphene and conventional semiconductor of Chirality KLEIN Tunneling in Single-layer Graphene KLEIN Tunneling and Conductivity KLEIN Tunneling
SEA-STARS OF NORTH CAROLINA . By I. E. GRAY,' MAUREEN E. DOWNEY,2 AND M. J. CERAME-VIVAS3
SEA-STARS OF NORTH CAROLINA . By I. E. GRAY,' MAUREEN E. DOWNEY,2 AND M. J. CERAME-VIVAS3 ABSTRACT North Carolina southward, nine range from North Carolina northward, and six occur both north and south of North Carolina. The affinities of the various Although isolated records exist., no previous at- t
Graphene tests of Klein phenomena
Stefano De Leo; Pietro Rotelli
2012-02-07
Graphene is characterized by chiral electronic excitations. As such it provides a perfect testing ground for the production of Klein pairs (electron/holes). If confirmed, the standard results for barrier phenomena must be reconsidered with, as a byproduct, the accumulation within the barrier of holes.
Maximal Completion Dominik Klein1
Hirokawa, Nao
Maximal Completion Dominik Klein1 and Nao Hirokawa1 1 School of Information Science Japan Advanced an equational system, completion procedures compute an equivalent and complete (termi- nating and confluent) term rewrite system. We present a very simple and efficient completion procedure, which is based on Max
Generalized Klein-Nishina formula
Krajewska, K; Kami?ski, J Z
2015-01-01
The generalized Klein-Nishina formula for Compton scattering of charged particles by a finite train of pulses is derived in the framework of quantum electrodynamics. The formula also applies to classical Thomson scattering provided that frequencies of generated radiation are smaller that the cut-off frequency. The validity of the formula for incident pulses of different durations is illustrated by numerical examples. The positions of the well-resolved Compton peaks, with the clear labeling by integer orders, opens up the possibility of the precise diagnostics of properties of relativistically intense, short laser pulses. This includes their peak intensity, the carrier-envelope phase, and their polarization properties.
Generalized Klein-Nishina formula
K. Krajewska; F. Cajiao Vélez; J. Z. Kami?ski
2015-03-23
The generalized Klein-Nishina formula for Compton scattering of charged particles by a finite train of pulses is derived in the framework of quantum electrodynamics. The formula also applies to classical Thomson scattering provided that frequencies of generated radiation are smaller that the cut-off frequency. The validity of the formula for incident pulses of different durations is illustrated by numerical examples. The positions of the well-resolved Compton peaks, with the clear labeling by integer orders, opens up the possibility of the precise diagnostics of properties of relativistically intense, short laser pulses. This includes their peak intensity, the carrier-envelope phase, and their polarization properties.
Quantum simulation of the Klein paradox
Gerritsma, R; Kirchmair, G; Zähringer, F; Hempel, C; Casanova, J; García-Ripoll, J J; Solano, E; Blatt, R; Roos, C F
2010-01-01
In 1929 Oskar Klein obtained a surprising result when investigating the scattering of a relativistic electron from an electrostatic potential step using the Dirac equation. Klein found that the electron can propagate through the step, without damping, and that the probability for this happening increases with the step height---a result commonly known as the Klein paradox. Since direct experimental investigations are lacking, and would be very challenging, the Klein paradox remains a much debated and investigated topic in relativistic quantum mechanics. Driven by the experimental inaccessibility of relativistic quantum systems there has been recent interest in performing quantum simulations. In this paper we report on the quantum simulation of relativistic scattering dynamics and the observation of Klein tunneling, using trapped ions. The combination of precise engineering of all terms in the simulated Hamiltonian and the ability to prepare arbitrary initial states enables the investigation of a wide range of ...
Notes On The Klein-Gordon Equation
Fredrick Michael
2010-04-09
In this article, we derive the scalar parametrized Klein-Gordon equation from the formal information theory framework. The least biased probability distribution is obtained, and the scalar equation is recast in terms of a Fokker-Planck equation in terms of the imaginary time, or a Schroedinger equation for the proper time. This method yields the Green's function parametrized by an evolution parameter. The derivation can then allow the use of potentials as constraints along with the Hamiltonian or moments of the evolution. The information theoretic, analogously the maximum entropy method, also allows one to examine the possibility of utilizing generalized and non-extensive statistics in the derivation. This approach yields non-linear evolution in the parametrized Klein-Gordon partial differential equations. Furthermore, we examine the Klein-Gordon equation in curved space-time, and we compare our results to the results of Schwinger and Dewitt obtained from path integral approaches.
Evidence Against Klein Paradox in Graphene
Daniela Dragoman
2008-02-23
It is demonstrated that both transmission and reflection coefficients associated to the Klein paradox at a step barrier are positive and less than unity, so that the particle-antiparticle pair creation mechanism commonly linked to this phenomenon is not necessary. Because graphene is a solid-state testing ground for quantum electrodynamics phenomena involving massless Dirac fermions we suggest that the transport characteristic through a p-n graphene junction can decide between the results obtained in this paper and the common Klein paradox theory, which imply negative transmission and higher-than-unity reflection coefficients. Recent experimental evidence supports our findings.
Will robots see? Stanley A. Klein
Klein, Stanley
Will robots see? Stanley A. Klein Will robots ever really see? Imagine a robot 10,000 years in the future. At that time we should finally understand the visual system and be able to build robots whose visual performance surpasses humans'. We will then ask: when a robot claims to be seeing, are its
On a Modified Klein Gordon Equation
B. S. Lakshmi
2009-08-09
We consider a modified Klein-Gordon equation that arises at ultra high energies. In a suitable approximation it is shown that for the linear potential which is of interest in quark interactions, their confinement for example,we get solutions that mimic the Harmonic oscillator energy levels, surprisingly. An equation similar to the beam equation is obtained in the process.
Dirac equation in the Nonsymmetric Kaluza-Klein Theory
Kalinowski, M W
2015-01-01
We rederive Dirac equation in the Nonsymmetric Kaluza-Klein Theory gettig an electric dipole moment of fermion and CP violation.
Dirac equation in the Nonsymmetric Kaluza-Klein Theory
M. W. Kalinowski
2015-07-08
We rederive Dirac equation in the Nonsymmetric Kaluza-Klein Theory gettig an electric dipole moment of fermion and CP violation.
Tracer Testing (Klein, 2007) | Open Energy Information
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-EnhancingEt Al., 2013)OpenEnergy FacilitiesInformationTown700 Jump(Klein, 2007)
Geothermometry (Klein, 2007) | Open Energy Information
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Klein-Gordon Equation in Hydrodynamical Form
Cheuk-Yin Wong
2010-12-22
We follow and modify the Feshbach-Villars formalism by separating the Klein-Gordon equation into two coupled time-dependent Schroedinger equations for particle and antiparticle wave function components with positive probability densities. We find that the equation of motion for the probability densities is in the form of relativistic hydrodynamics where various forces have their classical counterparts, with the additional element of the quantum stress tensor that depends on the derivatives of the amplitude of the wave function. We derive the equation of motion for the Wigner function and we find that its approximate classical weak-field limit coincides with the equation of motion for the distribution function in the collisionless kinetic theory.
Strong instability of standing waves for nonlinear Klein-Gordon equation and
Todorova, Grozdena
Strong instability of standing waves for nonlinear Klein-Gordon equation and Klein Classification: Primary 35L70; Secondary 35B35, 35A15 Keywords: nonlinear Klein-Gordon equations, standing waves, instability, Klein-Gordon-Zakharov system Abstract The orbital instability of ground state standing waves eit
Variational principles for eigenvalues of the Klein-Gordon equation
Langer, Matthias; Tretter, Christiane
2006-10-15
In this paper variational principles for eigenvalues of an abstract model of the Klein-Gordon equation with electromagnetic potential are established. They are used to characterize and estimate eigenvalues in cases where the essential spectrum has a gap around 0, even in the presence of complex eigenvalues. As a consequence, a comparison between eigenvalues of the Klein-Gordon equation in R{sup d} and eigenvalues of certain Schroedinger operators is obtained. The results are illustrated on examples including the Klein-Gordon equation with Coulomb and square-well potential.
Klein backscattering and Fabry-Perot resonances in graphene
Gabrieli, John
Klein backscattering and Fabry- Perot resonances in graphene p-n-p junctions Leonid Levitov gap = hvF/width Coulomb blockade in graphene Geim, Novoselov; Ensslin group #12;Graphene p
AUTOLING : AN AUTOMATED LINGUISTIC FIELDWORKER by Sheldon KLEIN
University of Wisconsin MADISON-WISCONSIN 53706 U. S. A. Sheldon Klein, Barbara G. Davis, William Fabens, Robert G. Herriot, Bill J. Katke, Michael A. Kuppin and Alicia E. Towster. ABSTRACT A system intended
On the invariant thermal Proca - Klein - Gordon equation
Magdalena Pelc
2007-10-14
In this paper we discuss the invariant thermal Proca - Klein - Gordon equation (PKG). We argue that for the thermal PKG equation the absolute velocity is equal v = alpha*c, where alpha is the fine stucture constant for electromagnetic interaction.
Signature of Seb Klein Signature of Seb Klein Signature of Steven Erhart
National Nuclear Security Administration (NNSA)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal GasAdministration Medal01 Sandia4) August 20123/%2A en Signature ofSeb Klein Signature of
NREL: Energy Analysis - Maureen Hand
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on771/6/14Recent Publications "EconomicMatthew O'Connell
Klein-Gordon and Dirac Equations with Thermodynamic Quantities
Altug Arda; Cevdet Tezcan; Ramazan Sever
2015-10-21
We study the thermodynamic quantities such as the Helmholtz free energy, the mean energy and the specific heat for both the Klein-Gordon, and Dirac equations. Our analyze includes two main subsections: ($i$) statistical functions for the Klein-Gordon equation with a linear potential having Lorentz vector, and Lorentz scalar parts ($ii$) thermodynamic functions for the Dirac equation with a Lorentz scalar, inverse-linear potential by assuming that the scalar potential field is strong ($A \\gg 1$). We restrict ourselves to the case where only the positive part of the spectrum gives a contribution to the sum in partition function. We give the analytical results for high temperatures.
Exercice session Cargse, October 2008 Klein tunneling in graphene
Paris-Sud 11, Université de
Exercice session Cargèse, October 2008 Klein tunneling in graphene Pierre Allain and Jean-Noël Fuchs 1 Introduction : plane wave The goal is to compute the probability transmission T of a graphene 1 = n2 sin 2 for an electron in graphene and show that the optical index n is proportional
THE BLUE SKY CATASTROPHE ON THE KLEIN BOTTLE
Zhang, Meirong
THE BLUE SKY CATASTROPHE ON THE KLEIN BOTTLE Weigu Li and Meirong Zhang Department of Mathematics orbit, the so-called blue sky catastrophe. Let's begin with the definition. Definition 1 One-parameter family of vector fields on a compact manifold has a blue sky catastrophe if for all parameter values from
Extra force in Kaluza-Klein gravity theory
W. B. Belayev
2007-06-18
In induced matter Kaluza-Klein gravity theory the solution of the dynamics equations for the test particle on null path leads to additional force in four-dimensional space-time. We find such force from five-dimensional geodesic line equations and apply this approach to analysis of the asymmetrically warped space-time.
Neutrinos from Kaluza-Klein dark matter in the Sun
Mattias Blennow; Henrik Melbeus; Tommy Ohlsson
2010-01-26
We investigate indirect neutrino signals from annihilations of Kaluza-Klein dark matter in the Sun. Especially, we examine a five- as well as a six-dimensional model, and allow for the possibility that boundary localized terms could affect the spectrum to give different lightest Kaluza-Klein particles, which could constitute the dark matter. The dark matter candidates that are interesting for the purpose of indirect detection of neutrinos are the first Kaluza-Klein mode of the U(1) gauge boson and the neutral component of the SU(2) gauge bosons. Using the DarkSUSY and WimpSim packages, we calculate muon fluxes at an Earth-based neutrino telescope, such as IceCube. For the five-dimensional model, the results that we obtained agree reasonably well with the results that have previously been presented in the literature, whereas for the six-dimensional model, we find that, at tree-level, the results are the same as for the five-dimensional model. Finally, if the first Kaluza-Klein mode of the U(1) gauge boson constitutes the dark matter, IceCube can constrain the parameter space. However, in the case that the neutral component of the SU(2) gauge bosons is the LKP, the signal is too weak to be observed.
1-D Dirac Equation, Klein Paradox and Graphene
S. P. Bowen
2008-07-23
Solutions of the one dimensional Dirac equation with piece-wise constant potentials are presented using standard methods. These solutions show that the Klein Paradox is non-existent and represents a failure to correctly match solutions across a step potential. Consequences of this exact solution are studied for the step potential and a square barrier. Characteristics of massless Dirac states and the momentum linear band energies for Graphene are shown to have quite different current and momentum properties.
Inflation in Kaluza-Klein cosmology. 2; Freidmann models
Bleyer, U. ); Schmidt, H.J. )
1990-12-20
The conformal relation between scale- invariant fourth-order gravity and Kaluza-Klein models as derived is applied to Friedmann cosmological models. Especially, the results that power-law inflation is an attractor solution can be carried over, but the conformal transformation brings power-law inflation to de Sitter-like exponential inflation, or power-law inflation a {approx} t. This paper reports that results depend essentially on the dimension of the internal space.
Klein-Gordon equation from Maxwell-Lorentz dynamics
Ricardo J. Alonso-Blanco
2012-02-19
We consider Maxwell-Lorentz dynamics: that is to say, Newton's law under the action of a Lorentz's force which obeys the Maxwell equations. A natural class of solutions are those given by the Lagrangian submanifolds of the phase space when it is endowed with the symplectic structure modified by the electromagnetic field. We have found that the existence of this type of solution leads us directly to the Klein-Gordon equation as a compatibility condition. Therefore, surprisingly, quite natural assumptions on the classical theory involve a quantum condition without any process of limit. This result could be a partial response to the inquiries of Dirac.
Dyonic Wormholes in 5D Kaluza-Klein Theory
Chen, C M
2001-01-01
New spherically symmetric dyon solutions, describing wormhole-like class of spacetime configurations, in 5D Kaluza-Klein theory are given in an explicit form. For this type of solutions the electric and magnetic fields cause significantly different global structure. When the two parameters indicating the electric and magnetic charges are identical, the throat of wormhole ``degenerates'' and the solution reduces to the trivial embedding of 4D massless Reissner-Nordstr{\\"o}m black hole solution. Moreover, their counterparts in 11D supergravity are constructed by a non-trivial uplifting.
MSSM from F-theory SU(5) with Klein Monodromy
Romão, Miguel Crispim; King, Stephen F; Leontaris, George K; Meadowcroft, Andrew K
2016-01-01
We revisit a class of $SU(5)$ SUSY GUT models which arise in the context of the spectral cover with Klein Group monodromy $V_4=Z_2\\times Z_2$. We show that $Z_2$ matter parities can be realised via new geometric symmetries respected by the spectral cover. We discuss a particular example of this kind, where the low energy effective theory below the GUT scale is just the MSSM with no exotics and standard matter parity, extended by the seesaw mechanism with two right-handed neutrinos.
The modified Klein Gordon equation for neolithic population migration
M. Pelc; J. Marciak-Kozlowska; M. Kozlowski
2007-03-11
In this paper the model for the neolithic migration in Europe is developed. The new migration equation, the modified Klein Gordon equation is formulated and solved. It is shown that the migration process can be described as the hyperbolic diffusion with constant speed. In comparison to the existing models based on the generalization of the Fisher approach the present model describes the migration as the transport process with memory and offers the possibility to recover the initial state of migration which is the wave motion with finite velocity.
Dyonic Wormholes in 5D Kaluza-Klein Theory
Chiang-Mei Chen
2001-09-04
New spherically symmetric dyonic solutions, describing a wormhole-like class of spacetime configurations in five-dimensional Kaluza-Klein theory, are given in an explicit form. For this type of solution the electric and magnetic fields cause a significantly different global structure. For the electric dominated case, the solution is everywhere regular but, when the magnetic strength overcomes the electric contribution, the mouths of the wormhole become singular points. When the electric and magnetic charge parameters are identical, the throats ``degenerate'' and the solution reduces to the trivial embedding of the four-dimensional massless Reissner-Nordstr{\\"o}m black hole solution. In addition, their counterparts in eleven-dimensional supergravity are constructed by a non-trivial uplifting.
Scattering of Klein–Gordon particles by a Kink-like potential
Hassanabadi, H.; Lu, Liangliang; Maghsoodi, E.; Liu, Guanghui; Zarrinkamar, S.
2014-03-15
The Klein–Gordon equation for the non-minimal vector and a scalar Kink-like potential is solved in terms of the hypergeometric functions. The scattering problem, i.e. the transmission and reflection coefficients, is studied as well. -- Highlights: •The Klein–Gordon equation for the non-minimal vector and a scalar Kink-like potential is solved. •We have calculated the corresponding transmission and reflection coefficients. •We discussed the behavior of the reflection and transmission coefficients vs. energy.
Kaluza-Klein Contamination in Fermi Accelerated Environments
Cong-Xin Qiu
2008-08-09
Astrophysical constraints of new physics are often limited to weakly interacting light particles, such as axions, the Kaluza-Klein (KK) gravitons from the ADD model, sterile neutrinos and unparticles. We discuss the possibility for an astrophysical scenario to (dis)confirm new physics for heavy particles beyond TeV energy scale. In our scenario, the KK protons (the KK excited quarks/gluons within protons) within the framework of universal extra dimensions (UEDs), are produced by high energy p + p collisions in Fermi accelerated environments, with protonic isotropic spectrum d N / d E \\propto E^-2 up to at least 10^18 eV. Thus, because they are also electrically charged, they should be re-accelerated by mechanism similar to normal protons. The KK states (no matter whether they have already decayed to the lightest KK particle or not) should contaminate 10^-5 to 10^-2 of cosmic-ray events for some fixed energy E (within some suitable assumptions). Hence, if we have techniques to identify them from air shower data, we can constrain UEDs scenario. Our method is an "existence proof" that we can constrain new physics beyond TeV scale or much higher by classical astrophysical scenarios, which can also be generalized to supersymmetric models, the bulk Standard Model fields within the RS model, and the endlessly emerging new models. Moreover, it can exploit domains which have no possibility to be studied in terrestrial experiments.
Global causal propagator for the KleinGordon equation on a class of supersymmetric AdS backgrounds
Enciso, Alberto
Global causal propagator for the KleinGordon equation on a class of supersymmetric AdS backgrounds analyze the Cauchy problem for the KleinGordon equation on the type IIB super- gravity backgrounds AdS5 of their connections to the AdS/CFT correspon- dence [2]. More precisely, if Y is a SasakiEinstein 5-manifold
Solutions for the Klein-Gordon and Dirac equations on the lattice based on Chebyshev polynomials
Nelson Faustino
2015-05-22
The main goal of this paper is to adopt a multivector calculus scheme to study finite difference discretizations of Klein-Gordon and Dirac equations for which Chebyshev polynomials of the first kind may be used to represent a set of solutions. The development of a well-adapted discrete Clifford calculus framework based on spinor fields allows us to represent, using solely projection based arguments, the solutions for the discretized Dirac equations from the knowledge of the solutions of the discretized Klein-Gordon equation. Implications of those findings on the interpretation of the lattice fermion doubling problem is briefly discussed.
Wind ringing of the ocean in presence of mesoscale eddies P. Klein and G. Lapeyre
Lapeyre, Guillaume
Wind ringing of the ocean in presence of mesoscale eddies P. Klein and G. Lapeyre Laboratoire de frequency (HF) winds on the inertial motions and the consequences on the large-scale oceanic circulation the impact of HF winds on the inertial motions. However the eddies efficiently and permanently concentrate
Corneal Topography: A review, new ANSI standards and problems to solve Stanley A. Klein
Klein, Stanley
Corneal Topography: A review, new ANSI standards and problems to solve Stanley A. Klein School@spectacle.berkeley.edu Abstract: This review of corneal topography has three sections: 1. a brief introduction to how corneal topography instruments work. A quantitative comparison of the relative accuracy of slope based and position
Single field inflationary models with non-compact Kaluza-Klein theory
Diego S. Ledesma; Mauricio Bellini
2003-12-04
We discuss a semiclassical treatment to inflationary models from Kaluza-Klein theory without the cylinder condition. We conclude that the evolution of the early universe could be described by a geodesic trayectory of a cosmological 5D metric here proposed, so that the effective 4D FRW background metric should be a hypersurface on a constant fifth dimension.
Stochastic model for detection of signals in noise Stanley A. Klein* and Dennis M. Levi
Klein, Stanley
Stochastic model for detection of signals in noise Stanley A. Klein* and Dennis M. Levi School, and in the process we will examine the general topic of modeling the detection of sig- nals in both noise and known was the utility of adding external noise to the sig- nals of interest. These methods have been enhanced in recent
EIGENVALUES OF SATURATED HYDROCARBONS D. J. KLEIN AND C. E. LARSON
Larson, Craig E.
EIGENVALUES OF SATURATED HYDROCARBONS D. J. KLEIN AND C. E. LARSON Abstract. A simplified HÂ¨uckel-type molecular-orbital (MO) model for the valence electrons of saturated hydrocarbons is proposed and half negative. Keywords: saturated hydrocarbons, alkanes, stellation, para-line graph. 1. Saturated
On the Lorentz invariance of the Square root Klein-Gordon Equation
Mohammad Javad Kazemi; Mohammad H. Barati; Jafar Khodagholizadeh; Alireza Babazadeh
2015-06-17
We show that the Born's rule is incompatible with Lorentz symmetry of the Square Root Klein-Gordon equation (SRKG equation). It has been demonstrated that the Born rule must be modified in relativistic regime if one wishes to keep the SRKG equation as the correct equation for describing quantum behavior.
Thesaurus-based Retrieval of Case Law Michel C.A. KLEIN a
van Harmelen, Frank
Thesaurus-based Retrieval of Case Law Michel C.A. KLEIN a , Wouter VAN STEENBERGEN b , Elisabeth M within the domain of tort law from a repository of 68.000 court verdicts. We apply a thesaurus interpretation. Keywords. retrieval, case law, ontology, thesaurus 1. Introduction The judiciary is faced
The statistical properties of Klein-Gordon oscillator in noncommutative space
Hassanabadi, H. Hosseini, S. S.; Boumali, A.; Zarrinkamar, S.
2014-03-15
We study the relativistic spin-zero bosons influenced by the Klein-Gordon oscillator and an external magnetic field in noncommutative formulation. The problem is considered in two dimensions and is solved in an exact analytical manner. Having found the spectrum of the system, the statistical properties of an N-boson system are reported.
Kovalyov, Mikhail [Department of Mathematics, University of Alberta, Edmonton, Alberta, T6G 2G1 (Canada)
2010-06-15
In this article the sets of solutions of the sine-Gordon equation and its linearization the Klein-Gordon equation are discussed and compared. It is shown that the set of solutions of the sine-Gordon equation possesses a richer structure which partly disappears during linearization. Just like the solutions of the Klein-Gordon equation satisfy the linear superposition principle, the solutions of the sine-Gordon equation satisfy a nonlinear superposition principle.
A Direct Proof of Global Existence for the Dirac-Klein-Gordon Equations in
Fang, Yung-Fu
A Direct Proof of Global Existence for the Dirac-Klein-Gordon Equations in One Space Dimension Yung . (2) The matrices µ are defined by 0 = I2 0 0 -I2 , 1 = 0 1 -1 0 , (3) 1991 Mathematics Subject Council at Taiwan, NSC90-2115-M006-025. 1 #12;2 Y.F. FANG where I2 is the 2 × 2 identity matrix, the wave
On the solution of the Heaviside - Klein - Gordon thermal equation for heat transport in graphene
Magdalena Pelc
2007-11-26
We report studies of the solution of the Heaviside - Klein - Gordon thermal equation. As the result it is shown that the solution consists of two components: the fast thermal wave and slow diffusion for very large (compared to relaxation time) time period. We argue that the fast thermal wave can be recognized as the indication of the ballistic heat transport. As an example we consider the ballistic heat transport in graphene.
Scattering state of Klein-Gordon Particles by q-parameter hyperbolic Poschl-Teller potential
Akpan Ndem Ikot; Hillary P. Obong; Israel O. Owate; Michael C. Onyeaju; Hassan Hassanabadi
2015-10-06
The one-dimensional Klein-Gordon equation for equal vector and scalar q-parameter hyperbolic Poschl-Teller potential is solved in terms of the hypergeometric functions. We calculate in details the solutions of the scattering and bound states. By virtue of the conditions of equation of continuity of the wave functions, we obtained explicit expressions for the reflection and transmission coefficients and energy equation for the bound state solutions
Inflation in Kaluza-Klein cosmology. 1; Transformation to fourth-order gravity
Schmidt, H.J. )
1990-12-20
This paper reports on the higher- dimensional Einstein equation with {Gamma}-term shown to be comformally equivalent to the four-dimensional field equation of scale-invariant fourth-order gravity. This holds for a general warped product between space-time and internal space of arbitrary dimension m which turns out to be an Einstein space. (The limit m {yields} {infinity} makes sense ) Thus, the results concerning the attractor property of the power- law inflationary solution derived for fourth-order gravity hold for the Kaluza-Klein model, too.
Kaluza-Klein electrically charged black branes in M-theory
Miguel S. Costa; Malcolm J. Perry
1996-10-16
We present a class of Kaluza-Klein electrically charged black p-brane solutions of ten-dimensional, type IIA superstring theory. Uplifting to eleven dimensions these solutions are studied in the context of M-theory. They can be interpreted either as a p+1 extended object trapped around the eleventh dimension along which momentum is flowing or as a boost of the following backgrounds: the Schwarzschild black (p+1)-brane or the product of the (10-p)-dimensional Euclidean Schwarzschild manifold with the (p+1)-dimensional Minkowski spacetime.
Kaluza-Klein electrically charged black branes in M-theory
Costa, M S; Costa, Miguel S.; Perry, Malcolm J.
1996-01-01
We present a class of Kaluza-Klein electrically charged black p-brane solutions of ten-dimensional, type IIA superstring theory. Uplifting to eleven dimensions these solutions are studied in the context of M-theory. They can be interpreted either as a p+1 extended object trapped around the eleventh dimension along which momentum is flowing or as a boost of the following backgrounds: the Schwarzschild black (p+1)-brane or the product of the (10-p)-dimensional Euclidean Schwarzschild manifold with the (p+1)-dimensional Minkowski spacetime.
Improved upper bounds on Kaluza-Klein gravity with current Solar System experiments and observations
Xue-Mei Deng; Yi Xie
2015-10-10
As an extension of previous works on classical tests of Kaluza-Klein (KK) gravity and as an attempt to find more stringent constraints on this theory, its effects on physical experiments and astronomical observations conducted in the Solar System are studied. We investigate the gravitational time delay at inferior conjunction caused by KK gravity, and use new Solar System ephemerides and the observation of \\textit{Cassini} to strengthen constraints on KK gravity by up to two orders of magnitude. These improved upper bounds mean that the fifth-dimensional space in the soliton case is a very flat extra dimension in the Solar System, even in the vicinity of the Sun.
On global behavior of solutions of the Maxwell-Klein-Gordon equations
Shiwu Yang
2015-11-01
It is known that the Maxwell-Klein-Gordon equations in $\\mathbb{R}^{3+1}$ admit global solutions with finite energy data. In this paper, we present a new approach to study the asymptotic behavior of these global solutions. We show the quantitative energy flux decay of the solutions with data merely bounded in some weighted energy space. We also establish an integrated local energy decay and a hierarchy of $r$-weighted energy decay. The results in particular hold in the presence of large total charge. This is the first result to give a complete and precise description of the global behavior of large nonlinear charged scalar fields.
Mass and Free energy in Thermodynamics of Squashed Kaluza-Klein Black Holes
Yasunari Kurita; Hideki Ishihara
2007-08-01
The Abbott-Deser mass, the Hamiltonian and the Komar mass of the 5-dimensional Kaluza-Klein black hole with squashed horizons take different values. Introducing a new couple of thermodynamic variables for the Komar mass, we show that each mass can be interpreted as a thermodynamic potential with its own natural variables, i.e. all masses are related to each other by the Legendre transformations. It is found that the new variables and the gravitational tension represent the squashing of the outer horizon.
Quantification of electrical charges in Kaluza Klein theory without strings of Dirac
Paulo da Costa Moreira
2006-04-19
It is proposed a formalism of quantification of the electric charges in the Kaluza Klein theory of five dimensions and a explanation of the cause of the variation of the electromagnetic fine-structure constant in cosmological times.There is a formalism that eliminates the problem that impeached the KK theory to complete the unification of the electromagnetic and the gravitational fields. The complete unification of these two fields is obtained. The radius of compactation is determined as 70,238 lengths of Planck.
Steven Kenneth Kauffmann
2013-09-29
The historical Klein-Gordon transformation of complex-valued first-order in time Schroedinger equations iterates these in a naively straightforward way which changes them into complex-valued second-order in time equations that have a plethora of extraneous solutions -- the transformation is an operator-calculus analogue of the squaring of both sides of an algebraic equation. The real and imaginary parts of a Schroedinger equation, however, are well known to be precisely the dynamical equation pair of the real-valued classical Hamiltonian functional which is numerically equal to the expectation value of that Schroedinger equation's Hermitian Hamiltonian operator. The purely real-valued second-order in time Euler-Lagrange equation of the corresponding classical Lagrangian functional is also isomorphic to that Schroedinger equation, and for symmetric Hamiltonians has exactly the same formal appearance as the corresponding naive complex-valued Klein-Gordon equation, but none of the latter's extraneous solutions. These quantum Schroedinger-equation isomorphisms to classical Euler-Lagrange equations are the technical manifestation of a key theoretical aspect of the principle of complementarity, one which is elegantly illustrated by the isomorphic free-photon wave-function complement to the vector potential of source-free classical electrodynamics.
An Improvement to a Berezin-Li-Yau type inequality for the Klein-Gordon Operator
Yolcu, Selma Yildirim
2009-01-01
In this article we improve a lower bound for $\\sum_{j=1}^k\\beta_j$ (a Berezin-Li-Yau type inequality) in [E. M. Harrell II and S. Yildirim Yolcu, Eigenvalue inequalities for Klein-Gordon Operators, J. Funct. Analysis, 256(12) (2009) 3977-3995]. Here $\\beta_j$ denotes the $j$th eigenvalue of the Klein Gordon Hamiltonian $H_{0,\\Omega}=|p|$ when restricted to a bounded set $\\Omega\\subset {\\mathbb R}^n$. $H_{0,\\Omega}$ can also be described as the generator of the Cauchy stochastic process with a killing condition on $\\partial \\Omega$. (cf. [R. Banuelos, T. Kulczycki, Eigenvalue gaps for the Cauchy process and a Poincare inequality, J. Funct. Anal. 211 (2) (2004) 355-423]; [R. Banuelos, T. Kulczycki, The Cauchy process and the Steklov problem, J. Funct. Anal. 234 (2006) 199-225].) To do this, we adapt the proof of Melas ([ A. D. Melas, A lower bound for sums of eigenvalues of the Laplacian, Proceedings of the American Mathematical Society, 131(2) (2002) 631-636]), who improved the estimate for the bound of $\\sum_...
Klein, Stanley
Wide angle cornea-sclera (ocular) topography Stanley A. Klein, John Corzine, School of Optometry is noisier, it is the only topographer available able to measure scleral topography that is critically OCULAR TOPOGRAPHY During the period from 1992 to 1999 corneal topography became a major focus for cornea
Ritter, Frank
Caffeine and stress alter salivary a-amylase activity in young men Laura C. Klein1*, Jeanette M and a psychological stressor on salivary a-amylase (sAA) in healthy young males (age 18 30 years) who consumed. Copyright # 2010 John Wiley & Sons, Ltd. key words -- blood pressure; caffeine; heart rate; salivary alpha-amylase
Marco Ghimenti; Anna Maria Micheletti
2014-01-21
Given a 3-dimensional Riemannian manifold (M,g), we investigate the existence of positive solutions of the nonlinear Klein-Gordon-Maxwell system and nonlinear Schroedinger-Maxwell system with subcritical nonlinearity. We prove that the number of one peak solutions depends on the topological properties of the manifold M, by means of the Lusternik Schnirelmann category.
A Surface Cauchy-Born model for silicon nanostructures Harold S. Park a,*, Patrick A. Klein b
Park, Harold S.
A Surface Cauchy-Born model for silicon nanostructures Harold S. Park a,*, Patrick A. Klein b- electronics industry [8]; with the scaling down in size of microelectronics components to the nanoscale 303 492 7750. E-mail address: harold.park@colorado.edu (H.S. Park). www
6-dimensional Kaluza-Klein Theory for Basic Quantum Particles and Electron-Photon Interaction
Xiaodong Chen
2005-01-26
By extending original Kaluza-Klein theory to 6-dimension, the basic quantum field equations for 0-spin particle, 1-spin particle and 1/2 spin particle with mass >0 are directly derived from 6-dimensional Einstein equations. It shows that the current quantum field equations of basic particles become pure geometry properties under 6-dimension time-space. The field equations of electron and photon can be unified in one 6-dimensional extended Maxwell equation. The equations containing interactions between electron and photon will be derived from Einstein equation under 6-dimension time-space. It shows that the interactions in QED can be considered as the effect of local geometry curvature changing instead of exchange virtual photons.
Gallet, Basile; Dubrulle, Bérengère
2015-01-01
In field theory, particles are waves or excitations that propagate on the fundamental state. In experiments or cosmological models one typically wants to compute the out-of-equilibrium evolution of a given initial distribution of such waves. Wave Turbulence deals with out-of-equilibrium ensembles of weakly nonlinear waves, and is therefore well-suited to address this problem. As an example, we consider the complex Klein-Gordon equation with a Mexican-hat potential. This simple equation displays two kinds of excitations around the fundamental state: massive particles and massless Goldstone bosons. The former are waves with a nonzero frequency for vanishing wavenumber, whereas the latter obey an acoustic dispersion relation. Using wave turbulence theory, we derive wave kinetic equations that govern the coupled evolution of the spectra of massive and massless waves. We first consider the thermodynamic solutions to these equations and study the wave condensation transition, which is the classical equivalent of Bo...
Negative heat capacity for a Klein-Gordon oscillator in non-commutative complex phase space
Slimane Zaim; Hakim Guelmamene; Yazid Delenda
2015-10-30
We obtain exact solutions to the two-dimensional Klein-Gordon oscillator in a non-commutative complex phase space to first order in the non-commutativity parameter. We derive the exact non-commutative energy levels and show that the energy levels split to $2m$ levels. We find that the non-commutativity plays the role of a magnetic field interacting automatically with the spin of a particle induced by the non-commutativity of complex phase space. The effect of the non-commutativity parameter on the thermal properties is discussed. It is found that the dependence of the heat capacity $C_V$ on the non-commutative parameter gives rise to a negative quantity. Phenomenologically, this effectively confirms the presence of the effects of self-gravitation induced by the non-commutativity of complex phase space.
Negative heat capacity for a Klein-Gordon oscillator in non-commutative complex phase space
Zaim, Slimane
2015-01-01
We obtain exact solutions of the two-dimensionl Klein-Gordon oscillator in a noncommutative (NC) complex phase space up to the first order of noncommutativity parameter. We derive the exact non-commutative energy levels and show that the energy is shifted to 2m levels. We have found that the non-commutativity plays the role of a magnetic field interacting automatically with the spin of a particle indused by the noncommutativity of complex phase space. The effect of the NC parameters on thermal properties was discussed. It is found that the dependence of C{V} on the non-commutative parameters gives rise to a negative quantity. Phenomenologically, this effectively confirms the presence the effects of a self-gravitating induced by the non-commutativity of complex phase space.
Eamonn Long; David Stuart
2009-05-07
We consider the nonlinear Klein Gordon Maxwell system on four dimensional Minkowski space-time. For appropriate nonlinearities the system admits soliton solutions which are gauge invariant generalizations of the non-topological solitons introduced and studied by T.D. Lee and collaborators for pure complex scalar fields. We develop a rigorous dynamical perturbation theory for these solitons in the small e limit, where e is the electromagnetic coupling constant. The main theorems assert the long time stability of the solitons with respect to perturbation by an external electromagnetic field produced by the background current, and compute their effective dynamics to O(e). The effective dynamical equation is the equation of motion for a relativistic particle acted on by the Lorentz force law familiar from classical electrodynamics.
Non-equilibrium steady states in the Klein-Gordon theory
Benjamin Doyon; Andrew Lucas; Koenraad Schalm; M. J. Bhaseen
2014-09-23
We construct non-equilibrium steady states in the Klein-Gordon theory in arbitrary space dimension $d$ following a local quench. We consider the approach where two independently thermalized semi-infinite systems, with temperatures $T_{\\rm L}$ and $T_{\\rm R}$, are connected along a $d-1$-dimensional hypersurface. A current-carrying steady state, described by thermally distributed modes with temperatures $T_{\\rm L}$ and $T_{\\rm R}$ for left and right-moving modes, respectively, emerges at late times. The non-equilibrium density matrix is the exponential of a non-local conserved charge. We obtain exact results for the average energy current and the complete distribution of energy current fluctuations. The latter shows that the long-time energy transfer can be described by a continuum of independent Poisson processes, for which we provide the exact weights. We further describe the full time evolution of local observables following the quench. Averages of generic local observables, including the stress-energy tensor, approach the steady state with a power-law in time, where the exponent depends on the initial conditions at the connection hypersurface. We describe boundary conditions and special operators for which the steady state is reached instantaneously on the connection hypersurface. A semiclassical analysis of freely propagating modes yields the average energy current at large distances and late times. We conclude by comparing and contrasting our findings with results for interacting theories and provide an estimate for the timescale governing the crossover to hydrodynamics. As a modification of our Klein-Gordon analysis we also include exact results for free Dirac fermions.
Barnes, Edwin; Wu, Chaolun
2009-01-01
We derive the dual CFT Virasoro algebras from the algebra of conserved diffeomorphism charges, for a large class of abelian Kaluza-Klein black holes. Under certain conditions, such as non-vanishing electric and magnetic monopole charges, the Kaluza-Klein black holes have a Reissner-Nordstrom space-time structure. For the non-extremal charged Kaluza-Klein black holes, we use the uplifted 6d pure gravity solutions to construct a set of Killing horizon preserving diffeomorphisms. For the (non-supersymmetric) extremal black holes, we take the NENH limit, and construct a one-parameter family of diffeomorphisms which preserve the Hamiltonian constraints at spatial infinity. In each case we evaluate the algebra of conserved diffeomorphism charges following Barnich, Brandt and Compere, and Silva. The former approach is the one employed almost exclusively in the literature and is boundary condition-dependent, whereas the latter is much less sensitive to the nature of the boundary conditions. At the Killing horizon, it...
Edwin Barnes; Diana Vaman; Chaolun Wu
2009-10-26
We derive the dual CFT Virasoro algebras from the algebra of conserved diffeomorphism charges, for a large class of abelian Kaluza-Klein black holes. Under certain conditions, such as non-vanishing electric and magnetic monopole charges, the Kaluza-Klein black holes have a Reissner-Nordstrom space-time structure. For the non-extremal charged Kaluza-Klein black holes, we use the uplifted 6d pure gravity solutions to construct a set of Killing horizon preserving diffeomorphisms. For the (non-supersymmetric) extremal black holes, we take the NENH limit, and construct a one-parameter family of diffeomorphisms which preserve the Hamiltonian constraints at spatial infinity. In each case we evaluate the algebra of conserved diffeomorphism charges following Barnich, Brandt and Compere, who used a cohomological approach, and Silva, who employed a covariant-Lagrangian formalism. At the Killing horizon, it is only Silva's algebra which acquires a central charge extension, and which enables us to recover the Bekenstein-Hawking black hole entropy from the Cardy formula. For the NENH geometry, the extremal black hole entropy is obtained only when the free parameter of the diffeomorphism generating vector fields is chosen such that the central terms of the two algebras are in agreement.
Ergodicity of the Martyna-Klein-Tuckerman Thermostat and the 2014 Snook Prize
William Graham Hoover; Carol Griswold Hoover
2015-01-28
Nos\\'e and Hoover's 1984 work showed that although Nos\\'e and Nos\\'e-Hoover dynamics were both consistent with Gibbs' canonical distribution neither dynamics, when applied to the harmonic oscillator, provided Gibbs' Gaussian distribution. Further investigations indicated that two independent thermostat variables are necessary, and often sufficient, to generate Gibbs' canonical distribution for an oscillator. Three successful time-reversible and deterministic sets of two-thermostat motion equations were developed in the 1990s. We analyze one of them here. It was developed by Martyna, Klein, and Tuckerman in 1992. Its ergodicity was called into question by Patra and Bhattacharya in 2014. This question became the subject of the 2014 Snook Prize. Here we summarize the previous work on this problem and elucidate new details of the chaotic dynamics in the neighborhood of the two fixed points. We apply six separate tests for ergodicity and conclude that the MKT equations are fully compatible with all of them, in consonance with our recent work with Clint Sprott and Puneet Patra.
Massive Klein--Gordon equation from a BEC-based analogue spacetime
Matt Visser; Silke Weinfurtner
2005-06-08
We extend the "analogue spacetime" programme by investigating a condensed-matter system that is in principle capable of simulating the massive Klein--Gordon equation in curved spacetime. Since many elementary particles have mass, this is an essential step in building realistic analogue models, and a first step towards simulating quantum gravity phenomenology. Specifically, we consider the class of two-component BECs subject to laser-induced transitions between the components. This system exhibits a complicated spectrum of normal mode excitations, which can be viewed as two interacting phonon modes that exhibit the phenomenon of "refringence". We study the conditions required to make these two phonon modes decouple. Once decoupled, the two distinct phonons generically couple to distinct effective spacetimes, representing a bi-metric model, with one of the modes acquiring a mass. In the eikonal limit the massive mode exhibits the dispersion relation of a massive relativistic particle: omega = sqrt[omega_0^2 + c^2 k^2], plus curved-space modifications. Furthermore, it is possible to tune the system so that both modes can be arranged to travel at the same speed, in which case the two phonon excitations couple to the same effective metric. From the analogue spacetime perspective this situation corresponds to the Einstein equivalence principle being satisfied.
A review of 'Ephelia,' ed. Maureen E. Mulvihill
Philip Milito
2004-01-01
COLLECTION, NEW YORK PUBLIC LIBRARY. With the location of a ?smoking gun? and an attractive new body of research, it appears that the case is closed at last on the tantalizing enigma, ?Ephelia.? This pseudonymous poet, songwriter, and playwright of late.../ (history shall judge the extent to which this huge effort is a literary fantasia or something very special). It was not until Mulvihill found a smoking gun for the Villiers case in an unattributed and privately printed broadsheet of 1679 that the new...
Megan Baumgart, Maureen Condon and Michael Loosemore, `03
was seeing all the destruction wrought upon this area by Hurricane Iris in October of 2001. Iris literally having lost what little they possessed in the first place, they remain upbeat. The rebuilding effort
Basile Gallet; Sergey Nazarenko; Bérengère Dubrulle
2015-04-21
In field theory, particles are waves or excitations that propagate on the fundamental state. In experiments or cosmological models one typically wants to compute the out-of-equilibrium evolution of a given initial distribution of such waves. Wave Turbulence deals with out-of-equilibrium ensembles of weakly nonlinear waves, and is therefore well-suited to address this problem. As an example, we consider the complex Klein-Gordon equation with a Mexican-hat potential. This simple equation displays two kinds of excitations around the fundamental state: massive particles and massless Goldstone bosons. The former are waves with a nonzero frequency for vanishing wavenumber, whereas the latter obey an acoustic dispersion relation. Using wave turbulence theory, we derive wave kinetic equations that govern the coupled evolution of the spectra of massive and massless waves. We first consider the thermodynamic solutions to these equations and study the wave condensation transition, which is the classical equivalent of Bose-Einstein condensation. We then focus on nonlocal interactions in wavenumber space: we study the decay of an ensemble massive particles into massless ones. Under rather general conditions, these massless particles accumulate at low wavenumber. We study the dynamics of waves coexisting with such a strong condensate, and we compute rigorously a nonlocal Kolmogorov-Zakharov solution, where particles are transferred non-locally to the condensate, while energy cascades towards large wave numbers through local interactions. This nonlocal cascading state constitute the intermediate asymptotics between the initial distribution of waves and the thermodynamic state reached in the long-time limit.
W. A. Zúñiga-Galindo
2015-06-10
We construct p-adic Euclidean random fields {\\Phi} over Q_{p}^{N}, for arbitrary N, these fields are solutions of p-adic stochastic pseudodifferential equations of Klein-Gordon type. From a mathematical perspective, the Euclidean fields are generalized stochastic processes parametrized by functions belonging to a nuclear countably Hilbert space, these spaces are introduced in this article, in addition, the Euclidean fields are invariant under the action of certain group of transformations. We also study the Schwinger functions of {\\Phi}.
Rossi, Enrico
disorder and quantum-mechanical trans- port. The physics of the p-n-p junction is governed by "KleinSignatures of Klein tunneling in disordered graphene p-n-p junctions E. Rossi,1 J. H. Bardarson,2 P that uniquely combines three crucial features: microscopic treatment of charge disorder, fully quantum
IceCube Collaboration; Abbasi, R.; al., et
2009-10-23
A search for muon neutrinos from Kaluza-Klein dark matter annihilations in the Sun has been performed with the 22-string configuration of the IceCube neutrino detector using data collected in 104.3 days of live-time in 2007. No excess over the expected atmospheric background has been observed. Upper limits have been obtained on the annihilation rate of captured lightest Kaluza-Klein particle (LKP) WIMPs in the Sun and converted to limits on the LKP-proton cross-sections for LKP masses in the range 250 - 3000 GeV. These results are the most stringent limits to date on LKP annihilation in the Sun.
Prabir Rudra
2012-11-09
In this work we have investigated the emergent scenario of the universe described by Loop quantum cosmology model, DGP brane model and Kaluza-Klein cosmology. Scalar field along with barotropic fluid as normal matter is considered as the matter content of the universe. In Loop quantum cosmology it is found that the emergent scenario is realized with the imposition of some conditions on the value of the density of normal matter in case of normal and phantom scalar field. This is a surprising result indeed considering the fact that scalar field is the dominating matter component. In case of Tachyonic field, emergent scenario is realized with some constraints on the value of $\\rho_{1}$ for both normal and phantom tachyon. In case of DGP brane-world realization of an emergent scenario is possible almost unconditionally for normal and phantom fields. Plots and table have been generated to testify this fact. In case of tachyonic field emergent scenario is realized with some constraints on $\\dot{H}$. In Kaluza-Klein cosmology emergent scenario is possible only for a closed universe in case of normal and phantom scalar field. For a tachyonic field realization of emergent universe is possible for all models(closed, open and flat).
Kaluza-Klein masses of bulk fields with general boundary conditions in AdS{sub 5} space
Chang, Sanghyeon; Park, Seong Chan; Song, Jeonghyeon
2005-05-15
Recently bulk Randall-Sundrum theories with the gauge group SU(2){sub L}xSU(2){sub R}xU(1){sub B-L} have drawn a lot of interest as an alternative to the electroweak symmetry breaking mechanism. These models are in better agreement with electroweak precision data since custodial isospin symmetry on the IR-brane is protected by the extended bulk gauge symmetry. We comprehensively study, in the S{sup 1}/Z{sub 2}xZ{sub 2}{sup '} orbifold, the bulk gauge and fermion fields with the general boundary conditions as well as the bulk and localized mass terms. Master equations to determine the Kaluza-Klein (KK) mass spectra are derived without any approximation, which is an important basic step for various phenomenologies at high energy colliders. The correspondence between orbifold boundary conditions and localized mass terms is demonstrated not only in the gauge sector but also in the fermion sector. As the localized mass increases, the first KK fermion mass is shown to decrease while the first KK gauge boson mass is shown to increase. The degree of gauge coupling universality violation is computed to be small in most parameter space, and its correlation with the mass difference between the top quark and light quark KK mode is also studied.
M. W. Kalinowski
2015-06-29
The Nonsymmetric Kaluza-Klein (Jordan-Thiry) Theory leads to a model of a modified acceleration that can fit an anomalous acceleration experienced by the Pioneer 10 and 11 spacecraft. The future positions of those spacecrafts are predicted using distorted hyperbolic orbit. A connection between an anomalous acceleration and a Hubble constant is solved in the theory together with a relation to a cosmological constant using a paradigm of modern cosmology. . In the paper we consider an exact solution of a point mass motion in the Solar System under an influence of an anomalous acceleration. We find two types of orbits: periodic and chaotic. Both orbits are bounded. This means there is no possibility to escape from the Solar System. Some possibilities to avoid this conclusion are considered. Relativistic effects and a cosmological drifting of a gravitational constant are considered.The model of an anomalous acceleration does not cause any contradiction with Solar System observations. We give a full statistical analysis of the model.
Miguel Ballesteros; Ricardo Weder
2015-06-09
We study obstacle scattering for the Klein-Gordon equation in the presence of long-range magnetic potentials. We extend our previous results for the Klein-Gordon equation to the long-range case and bring to the relativistic scenario the results we previously proved for high-momenta long-range scattering for the Schr\\"odinger equation. Interestingly, we show that there are important differences between relativistic and non-relativistic scattering concerning long-range. In particular, we prove that the electric potential can be recovered without assuming that we know the long-range part of the magnetic potential, which has to be supposed in the non-relativistic case. We prove that the electric potential and the magnetic field can be recovered from the high momenta limit of the scattering operator, as well as fluxes modulo $2 \\pi $ around handles of the obstacle. Moreover, we prove that, for every $\\hat{\\mathbf v} \\in \\mathbb{S}^2$, $ A_\\infty(\\hat{\\mathbf v}) + A_\\infty(-\\hat{\\mathbf v})$ can be reconstructed, where $A_\\infty$ is the long-range part of the magnetic potential. We additionally give a simple formula of the high momenta limit of the scattering operator in terms of magnetic fluxes over handles of the obstacle and long-range magnetic fluxes at infinity, that we introduce in this paper. The appearance of these long-range magnetic fluxes is a new effect in scattering theory.
Sameer M. Ikhdair
2011-10-05
The approximate analytic bound state solutions of the Klein-Gordon equation with equal scalar and vector exponential-type potentials including the centrifugal potential term are obtained for any arbitrary orbital angular momentum number l and dimensional space D. The relativistic/non-relativistic energy spectrum equation and the corresponding unnormalized radial wave functions, in terms of the Jacobi polynomials P_{n}^{({\\alpha},{\\beta})}(z), where {\\alpha}>-1, {\\beta}>-1 and z\\in[-1,+1] or the generalized hypergeometric functions _{2}F_{1}(a,b;c;z), are found. The Nikiforov-Uvarov (NU) method is used in the solution. The solutions of the Eckart, Rosen-Morse, Hulth\\'en and Woods-Saxon potential models can be easily obtained from these solutions. Our results are identical with those ones appearing in the literature. Finally, under the PT-symmetry, we can easily obtain the bound state solutions of the trigonometric Rosen-Morse potential.
Techno-Orientalism with Chinese Characteristics: Maureen F. McHugh’s China Mountain Zhang
Fan, Christopher T.
2015-01-01
subject formation within the socioeconomic space of US– China interdependency might look like: namely, as a racialized mode
Techno-Orientalism with Chinese Characteristics: Maureen F. McHugh’s China Mountain Zhang
Fan, Christopher T.
2015-01-01
china.html. ———. China Mountain Zhang. New York: Doherty,Ethnicity and Gender: China Mountain Zhang’s Transcendent2011), 285. McHugh, China Mountain Zhang, 6. Betsy Pei Chih
Shear wave splitting and the pattern of mantle flow beneath eastern Oregon Maureen D. Long a,
period of bimodal (basaltic and silicic) volcanism in both the High Lava Plains and Snake River Plain October 2009 Editor: Y. Ricard Keywords: intraplate volcanism High Lava Plains Blue Mountains Pacific Oregon includes the volcanically active High Lava Plains (HLP) province and the accreted terrains
PSYCHOLOGY (Ph.D.) Executive Officer: Professor Maureen O'Connor
Artemov, Sergei N.
n Elizabeth F. Chua n W. Crawford Clark n Josh W. Clegg n Yochi Cohen-Charash n Susan D. Croll n Kristen Gillespie-Lynch n Demis Glasford n Joseph Glick n Paul B. Glovinsky n Elkhonon Goldberg n Harold W Leigh T. Graham n Frank W. Grasso n Joan Greenbaum n John D. Greenwood n Jillian Grose- Fifer n Louise
2. Scaling Laws and Complexity in Fire Donald McKenzie and Maureen Kennedy
to define and quantify scales in communities or ecosystems. 2.1 Scale and Contagious Disturbance A contagious disturbance is one that spreads across a landscape over time, and whose intensity depends;2 2002). Some natural hazards (Cello and Malamud 2006), such as wildfires, are therefore contagious
Mease, Kenneth D.
al. imposed order on the buckling of polystyrene by applying a physical mold during the buckling (down to 2 mm periodicity) as well as directionality, the process required a microfabricated mold on the thickness of the metal film, the material properties of the film and substrate, and the overall shrinking
Operating System Verification --An Overview Gerwin Klein
Klein, Gerwin
is properly the first time (Parker, 2007). This engineer's credo has made it into popular literature
An Orchard Snapshot By Bill Klein
and insecticides to the orchard. Most sprayers today utilize air to carry the water and spray material to the tree Evans Modern cherry harvest is typically done mechanically with a machine called a shaker. The cherry and sweet cherries were hand picked. Trees that took hours to harvest by hand can now be shaken at a rate
Kaluza-Klein Magnetized Cylindrical Wormhole
Hashemi, S Sedigheh
2015-01-01
A new exact vacuum solution in five dimensions, which describes a magnetized cylindrical wormhole in $3+1$ dimensions is presented. The magnetic field lines are stretched along the wormhole throat and are concentrated near to it. We study the motion of neutral and charged test particles under the influence of the magnetized wormhole. The effective potential for a neutral test particle around and across the magnetized wormhole has a repulsive character. The total magnetic flux on either side of the wormhole is obtained. We present analytic expressions which show regions in which the null energy condition is violated.
Isotopic Analysis (Klein, 2007) | Open Energy Information
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View NewTexas: Energy ResourcesOrder at 8, 13RenewableIrem GeothermalIslip Terrace,Open
Robertson, Randy
2007-01-01
not recorded in either the Wing Catalogue or the English Short Title Catalogue (Chronology, I, 39, 42). Such examples could be multiplied. One drawback to such a colossal work as the Chronology is that readers might mistake it for a comprehensive treatment...), Eighteenth Century Online (ECCO), and other online subscription services are astronomically expensive and have created a class system within academia. But the British Library has made the English Short Title Catalogue (ESTC) publicly accessible (estc...
High Level Waste Corporate Board Newsletter - 09/11/08
Office of Environmental Management (EM)
UPCOMING EVENTS: The Low-Level Waste Federal Review Group (LFRG) in Washington, DC on 16-18 September 2008. Contact Maureen O'Dell for details (MAUREEN.O'DELL@hq.doe.gov) Next...
The chaplins: a family of hydrophobic cell-surface proteins involved
Elliot, Marie A.
in Streptomyces coelicolor Marie A. Elliot,1,4 Nitsara Karoonuthaisiri,2 Jianqiang Huang,3 Maureen J. Bibb,1
Trace Element Analysis (Klein, 2007) | Open Energy Information
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-EnhancingEt Al., 2013)OpenEnergy FacilitiesInformationTown700 Jump to:
Dynamic Multiscale Visualization of Flight Data Tijmen Klein1
Telea, Alexandru C.
), epi- demics propagation, and crisis situation analysis. Within this context, we focus on the analysis of air- plane movement data sets. Such data sets consist of sev- eral airplane trajectories, or trails
Unification and explanation in early Kaluza-Klein theories
Muntean, Ioan Lucian
2009-01-01
argument against hyper-dimensional bodies: “Now a continuumthis hyper-inflated explanatory power of extra-dimensional
Grand canonical ensembles in general relativity David Klein1
Klein, David
-Sitter space, Einstein static universe, Kerr space-time Mathematics Subject Classification: 82B21, 83C15, 83F05 a framework for general relativistic statistical mechanics. However, there are several impediments. First energy, which is a feature of central importance in statistical mechanics, normally has no place
Unification and explanation in early Kaluza-Klein theories
Muntean, Ioan Lucian
2009-01-01
attraction (Newton’s gravitation law). 251 D=3 because someand gravitation and not a specific phenomenon. The explananda, as we will see later are laws,law (this is the case with EM and electroweak theory). But gravitation
Unification and explanation in early Kaluza-Klein theories
Muntean, Ioan Lucian
2009-01-01
fundamental level and GR is the theory that deals with it, unlike EM theory. The electromagneticfundamental level. The luminiferous ether has simply disappeared from the theory, being replaced by the electromagnetic
Monomial Embeddings of the Klein Curve \\Lambda Iwan M. Duursma
Duursma, Iwan M.
of the automorÂ phism group. The curve has 24 flexpoints, i.e. points where the tangent intersects]. For the case N = 25, we first consider a configuration in PG(2; 8). Starting point are the seven points and seven lines of the Fano plane. Through the seven points pass 42 lines not in the Fano plane
Consistent Kaluza-Klein Truncations via Exceptional Field Theory
Hohm, Olaf
2014-01-01
We present the generalized Scherk-Schwarz reduction ansatz for the full supersymmetric exceptional field theory in terms of group valued twist matrices subject to consistency equations. With this ansatz the field equations precisely reduce to those of lower-dimensional gauged supergravity parametrized by an embedding tensor. We explicitly construct a family of twist matrices as solutions of the consistency equations. They induce gauged supergravities with gauge groups SO(p,q) and CSO(p,q,r). Geometrically, they describe compactifications on internal spaces given by spheres and (warped) hyperboloides $H^{p,q}$, thus extending the applicability of generalized Scherk-Schwarz reductions beyond homogeneous spaces. Together with the dictionary that relates exceptional field theory to D=11 and IIB supergravity, respectively, the construction defines an entire new family of consistent truncations of the original theories. These include not only compactifications on spheres of different dimensions (such as AdS$_5\\time...
Consistent Kaluza-Klein Truncations via Exceptional Field Theory
Olaf Hohm; Henning Samtleben
2015-01-29
We present the generalized Scherk-Schwarz reduction ansatz for the full supersymmetric exceptional field theory in terms of group valued twist matrices subject to consistency equations. With this ansatz the field equations precisely reduce to those of lower-dimensional gauged supergravity parametrized by an embedding tensor. We explicitly construct a family of twist matrices as solutions of the consistency equations. They induce gauged supergravities with gauge groups SO(p,q) and CSO(p,q,r). Geometrically, they describe compactifications on internal spaces given by spheres and (warped) hyperboloides $H^{p,q}$, thus extending the applicability of generalized Scherk-Schwarz reductions beyond homogeneous spaces. Together with the dictionary that relates exceptional field theory to D=11 and IIB supergravity, respectively, the construction defines an entire new family of consistent truncations of the original theories. These include not only compactifications on spheres of different dimensions (such as AdS$_5\\times S^5$), but also various hyperboloid compactifications giving rise to a higher-dimensional embedding of supergravities with non-compact and non-semisimple gauge groups.
Klein's Group as a Borromean Object by Rene Guitart
Guitart, René - Institut de Mathématiques de Jussieu, Université Paris 7
in groups, boolean algebras, semi-rings, rings, fields. But the notion is introduced mainly for the case´een dans une cat´egorie. Nous don- nons des exemples dans les groupes, les alg`ebres de Boole, les semi borromean algebra Roughly speaking a borromean diagram for an object B is a presentation of this object B
The International Linear Collider as a Kaluza-Klein Factory
Biplob Bhattacherjee; Anirban Kundu
2005-09-02
In the minimal Universal Extra Dimension model, single production of n = 2 gauge bosons provides a unique discriminating feature from supersymmetry. We discuss how the proposed International Linear Collider can act as a n = 2 factory, much in the same vein as LEP. We also touch upon the potential of the gamma-gamma mode of the collider to study the production and the decay of an intermediate mass Higgs boson and its KK excitations.
Laura Cousino Klein, Ph.D. Associate Professor, Biobehavioral Health &
Dennis, Nancy
; Rapp et al 2000) · Intravenous self-administration (Levin et al 2003) · Oral consumption (forced of Adolescent Risky Behavior #12;Many factors influence initiation of nicotine consumption during adolescence #12;Factors that influence initiation of nicotine consumption during adolescence: · Biological factors
From Klein's Platonic Solids to Kepler's Archimedean Solids: [3pt ...
Edray Herber Goins
2012-08-23
Aug 31, 2012 ... By restriction, the alternating group A5 = ?r, s ?? s2 = r3 = (s r)5 = 1? acts on the icosahedron, that is, ? : A5 × V ? V via the fractional linear.
Surface Gas Sampling (Klein, 2007) | Open Energy Information
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Snohomish PUD Steve Klein CEO/General Manager
Broader source: Energy.gov (indexed) [DOE]
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Fluid Inclusion Analysis (Klein, 2007) | Open Energy Information
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Gas Flux Sampling (Klein, 2007) | Open Energy Information
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The Melvin P. Klein Scientific Development Award | Stanford Synchrotron
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Compound and Elemental Analysis (Klein, 2007) | Open Energy Information
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Kaluza-Klein dark matter and galactic antiprotons (Journal Article) |
Office of Scientific and Technical Information (OSTI)
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Leading the Charge: Christine Klein | Department of Energy
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURING OFFICE INDUSTRIALU.S.Leadership on Clean Energys o u t h e a s t e
Yoder, James S.
. · The 1997/1998 El Nino started in May 1997, peaked in November 1997, and ended in April 1998. The transition between El Nino and La Nina occurred between May and June 1998. La Nina started in July 1998, peaked in December 1998, and ended in February 2001. · A weaker El Nino started in May 2002, peaked in November 2002
A Pastiche of the Arts and Educational Research
McKean, Bobbi; Yarnelle, David
2007-01-01
music education in early childhood education. Maureen Harrisrenewed emphasis on early childhood education both in thearts beginning with early childhood education. Finally, Jess
WREF 2012: THE PAST AND FUTURE COST OF WIND ENERGY
Wiser, Ryan
2013-01-01
AND FUTURE COST OF WIND ENERGY Eric Lantz & Maureen Hand National RenewableRenewable Energy Laboratory. Further improving our understanding of possible future
Land-Use Requirements of Modern Wind Power Plants in the United...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
4 August 2009 Land-Use Requirements of Modern Wind Power Plants in the United States Paul Denholm, Maureen Hand, Maddalena Jackson, and Sean Ong National Renewable Energy...
Implications of a PTC Extension on U.S. Wind Deployment
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Implications of a PTC Extension on U.S. Wind Deployment Eric Lantz, Daniel Steinberg, Michael Mendelsohn, Owen Zinaman, Ted James, Gian Porro, Maureen Hand, Trieu Mai, Jeffrey...
Direct measurement and characterization of active photosynthesis...
Office of Scientific and Technical Information (OSTI)
process optimization. Authors: Bernstein, Hans C. ; Kesaano, Maureen ; Moll, Karen ; Smith, Terence ; Gerlach, Robin ; Carlson, Ross ; Miller, Charles D. ; Peyton, Brent ;...
Annual Report on U.S. Wind Power Installation, Cost, and Performance Trends: 2006
2008-01-01
Lab), Kathy Belyeu (AWEA), Maureen Hand (NREL), DonnaHeimiller (NREL), DebraLew (NREL), Michael Milligan (NREL), Andrew Mills (Berkeley
AIAA-2003-0862 INFLOW AND FATIGUE RESPONSE OF THE NWTC ADVANCED
. Sutherland Wind Energy Technology Department Sandia National Laboratory Albuquerque, NM 87185-0708 hjsuthe@sandia.gov Neil D. Kelley M. Maureen Hand NREL/National Wind Technology Center Golden, CO 80401 neil_kelley@nrel.gov, maureen_hand@nrel.gov ABSTRACT The Long-term Inflow and Structural Test (LIST) program is collecting long
) and natural (e.g. fish, quadrapeds) are composed of underactuated systems whose dynamics are inherently
Microsoft PowerPoint - SRNL-L2100-2015-00033-S_Klein
Office of Environmental Management (EM)
32 New Development Pathway * Eliminate Use of Hot and Cold Nitrogen * Liquid Nitrogen Cooling * Electric Heaters * Advanced Column Designs * Business Proprietary * Develop...
Supersymmetric and Kaluza-Klein Particles Multiple Scattering in the Earth
Albuquerque, Ivone
2009-01-01
http://en.wikipedia.org/wiki/Earth#Chemical composition [12]Multiple Scattering in the Earth The IceCube CollaborationMultiple Scattering in the Earth Ivone F. M. Albuquerque
Tunnelling of scalar and Dirac particles from squashed charged rotating Kaluza-Klein black holes
M. M. Stetsko
2014-10-08
Thermal radiation of scalar particles and Dirac fermions from squashed charged rotating five-dimensional black holes is considered. To obtain temperature of the black holes we use the tunnelling method. In case of scalar particles we make use of the Hamilton-Jacobi equation. To consider tunnelling of fermions the Dirac equation was investigated. The examination shows that radial parts of the action for scalar particles and fermions in quasi-classical limit in the vicinity of horizon are almost the same and as a consequence it gives rise to the identical expressions for the temperature in both cases.
Borromean Objects, as examplified by the group G168 of Klein's Quartic, linked with Moving Logic
Guitart, René - Institut de Mathématiques de Jussieu, Université Paris 7
} is a smooth algebraic curve, and so is riemannian, and her genus is 3. Its group of homographic symetries is G of borromean objects in rings (borromean rings !) or even in boolean algebras. Finally we explain how-rendu 2004-10/Mars 2004, LAMFA CNRS UMR 6140, 39-47. [4] R. Guitart, Moving Logic, from Boole to Galois
(References: Klein SA, RB McCoy, H Morrison, AS Ackerman, A
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired SolarAboutXuRod Hunt (208)InventorHow to Save(ANL-IN-03-032) -Feb 16
Microsoft PowerPoint - KLEIN_ARM_STM08_POSTER.ppt
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on darkMicroorganismsnow widely using inCopyright: SIPC LNG:
Microsoft PowerPoint - klein.cmwg.summary.pps [Compatibility Mode]
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
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Microsoft PowerPoint - klein.cmwg.summary.ppt [Compatibility Mode]
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on darkMicroorganismsnowReportJ. Conti DirectorPage
Rudd Klein Alternative Energy Ventures LLC aka Phoenix Energy Fund | Open
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University of California Shared Image Collections: Convergence and Expansion
Zentall, Lena; Burns, Maureen
2008-01-01
Marmor, “ArtSTOR: A Digital Library for the History of Art,”Lena Zentall, California Digital Library, and Maureen Burns,to painstakingly build a digital library of over 120,000
Published Ahead of Print 27 June 2008. 2008, 190(17):5879. DOI: 10.1128/JB.00685-08.J. Bacteriol.
Elliot, Marie A.
. Kim C. Findlay, Mark J. Buttner and Marie A. Elliot Christina Di Berardo, David S. Capstick, Maureen J and Marie A. Elliot1,2 * Department of Biology and Institute for Infectious Disease Research, Mc
Fourth Annual Western Evolutionary Biology Meeting
Rose, Michael R.
Fourth Annual Western Evolutionary Biology Meeting University of California Presentation of the fourth annual Western Evolutionary Biologist of the Year (WEBEY) Award. 5:00 PM Fourth Annual WEBEY Address, Maureen Stanton, UC Davis 6:00 PM
Pamuk’s Dis-orient: Reassembling Kafka’s Castle in Snow (2002)
Gramling, David J
2007-01-01
YayPnlarP, 2002. Pamuk, Orhan. Snow. Trans. Maureen Freely.of the land” come into Pamuk, Snow 15. “‘Bizden ayrPldPktanbe reading his new poem “Snow” before a public audience. Ka
Reap, Maureen Elizabeth
1991-01-01
NITZSCHIA PUNGE1VS GRUNOW F. MULTISERIES HASLE: GROWTH PHASES AND TOXICITY OF CLONAL CULTURES ISOLATED FROM GALVESTON, TEXAS A Thesis by MAUREEN ELIZABETH REAP Submitted to the Once of Graduate Studies of Texas AkM University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1991 Major Subject: Oceanography NITZSCHIA PUNGENS GRUNOW F. MUITISERIES HASLE: GROWTH PHASES AND TOXICITY OF CLONAL CULTURES ISOLATED FROM GALVESTON) TEXAS A Thesis by MAUREEN...
Klein, Dan
(Tromble et al., 2008; DeNero et al., 2009; Li et al., 2009; Kumar et al., 2009). This change in decoding
Wisconsin at Madison, University of
1 OPTIMIZATION OF HYBRID GEOTHERMAL HEAT PUMP SYSTEMS Scott Hackel, Graduate Research Assistant, Madison, WI, United States Abstract: Hybrid ground-coupled heat pump systems (HyGCHPs) couple conventional ground- coupled heat pump (GCHP) equipment with supplemental heat rejection or extraction systems
Firestone, Jeremy
to the fields of solar energy, wind energy, or other forms of renewable energy in other ways. PANEL OF JUDGES to greater performance and efficiency of solar cells and arrays. Previous award recipients were: 1993NOMINATIONS INVITED · The Executive Director of the Karl W. Böer Solar Energy Medal of Merit Trust
OPERATIONS ON THE A-THEORETIC NIL-TERMS JOACHIM GRUNEWALD, JOHN R. KLEIN AND TIBOR MACKO
Macko, Tibor
. For a space X, we define Frobenius and Verschiebung operations on the nil-terms NAfd Â± (X) in the algebraic K], [Rog03], but not much is known about the nil-terms. These are the subject of the present paper. Recall operations define a structure of a Z[NÃ?]-module on the homotopy groups of the nil-terms. Here NÃ? = {1, 2
I. Radinschi; Th. Grammenos
2005-08-01
We use Moeller's energy-momentum complex in order to explicitly compute the energy and momentum density distributions for an exact solution of Einstein's field equations with a negative cosmological constant minimally coupled to a static massless scalar field in a static, spherically symmetric background in (2+1)-dimensions.
Krivobokova, Tatyana
. Introduction There is general agreement among economists that free trade promotes an efficient allocation of international trade are widely agreed upon by economists. There is more debate about the ease with which trade trade as compared to intra-national trade. As a result, border effects have been cited as one
Menczer, Filippo
and user access; (2) OIL, an ontology-based inference layer on top of the World Wide Web; (3) an associated of heterogeneous, distributed, and semi-structured documents typically found in large company intranets
van Harmelen, Frank
for semantic information processing and user access; (2) OIL, an ontology-based inference layer on top in large company intranets and the World Wide Web. The project's target results are: (1) a toolset
Capsicum annuum (Cultivated) 4
James R. Manhart
2011-08-10
about the complexity of ecclesiastical polity. Those who continue to urge a portrait of the period as the seedbed of secular liberty will, like his contemporaries, find Goodwin a formidable obstacle and paradox. D. F. McKenzie and Maureen Bell, eds... (CSPD), the Journals of the House of Commons and the House of Lords, and the Court Books of the Stationers? Company during the span 1641-1700. As Maureen Bell notes in her brief introduction, McKenzie had relied on the indexes of many of these official...
Abbasi, R.
2010-01-01
matter annihilations in the Sun from the IceCube 22-stringmatter annihilations in the Sun from the IceCube 22-stringmatter annihilations in the Sun has been performed with the
Pelinovsky, Dmitry
formation in eletrical lattices and in micromechanical cantilever arrays [33], Bose-Einstein condensates
Ucoluk, Gokturk
the observed phenomena. Here Tab are the components of the symmetrised stress-energy-momentum tensor',"' = Ra,b, A Ra2b2 A . . . A R, b *(eal A eb' A . . . A ear1 A ebtt)I1 II (3) t A von Humbold
van Harmelen, Frank
OIL in a Nutshell D. Fensel1, I. Horrocks2, F. Van Harmelen1,3, S. Decker4, M. Erdmann4, and M will present OIL, which is a proposal for such a standard. It is based on existing proposals such as OKBC, XOL the main ideas of OIL. 1 Introduction Currently, we are on the brink of the second Web generation. The Web
Murawski, Andrzej
OIL in a Nutshell D. Fensel1, I. Horrocks2, F. Van Harmelen1,3, S. Decker4, M. Erdmann4, and M is precisely concerned with this necessity. We will present OIL, which is a proposal for such a standard for expressing ontologies. The paper sketches the main ideas of OIL. 1. Introduction Currently, we
Abbasi, R.
2010-01-01
of the Sun as a function of neutrino energy, see Fig. 2.high energy neutrinos from the direction of the Sun. Despiteand energy losses of the neutrinos on their way out of the Sun,
Xue, Ming
data sets collected across the14 Oklahoma City metropolitan area during the Joint Urban field (WRF) model. The strength of the LLJs and turbulent mixing in the NBL17 both increase in LLJ speed relative to20 the mixed layer wind speed in the daytime convective boundary layer (CBL)21
Curriculum Vitae of KATE ZOELLNER
Vonessen, Nikolaus
. Complete national surveys including the ACRL Trends and Statistics Survey and NCES Academic LibrariesCurriculum Vitae of KATE ZOELLNER Maureen and Mike Mansfield Library kate://weblib.lib.umt.edu/faculty/zoellner EDUCATION Master of Science in Information, Library and Information Services, School of Information
The Sequence of the Human Genome J. Craig Venter,1
Brutlag, Doug
Gangadharan Subramanian,1 Paul D. Thomas,1 Jinghui Zhang,1 George L. Gabor Miklos,2 Catherine Nelson,3 Samuel,1 Ping Guan,1 Thomas J. Heiman,1 Maureen E. Higgins,1 Rui-Ru Ji,1 Zhaoxi Ke,1 Karen A. Ketchum,1,1 Ming Lai Cheng,1 Liz Curry,1 Steve Danaher,1 Lionel Davenport,1 Raymond Desilets,1 Susanne Dietz,1
IEEE JOURNAL OF BIOMEDICAL AND HEALTH INFORMATICS, 2015 1 Automated Clinical Assessment from Smart
Cook, Diane J.
, and Maureen Schmitter-Edgecombe Abstract--Smart home technologies offer potential benefits for assisting benefits of smart home-based analysis by monitoring daily behaviour in the home and predicting standard using Activity Behavior (CAAB) approach to model a smart home resident's daily behavior and predict
CONSTRAINTS ON SUBDUCTION GEODYNAMICS FROM SEISMIC ANISOTROPY
on the characterization and interpretation of seismic anisotropy can lead to progress, particularly in frontier areasCONSTRAINTS ON SUBDUCTION GEODYNAMICS FROM SEISMIC ANISOTROPY Maureen D. Long1 Received 4 October, and the interactions between slabs and deep discontinuities such as the core-mantle boundary. Observations of seismic
URI inAdvance Online Newsletter November 6, 2008
Rhode Island, University of
on November 18 is our post- election Web chat with Professor of Political Science Maureen Moakley. Her topic World University Games in Harbin, China, from February 18 through 28. The U.S. University Select Team United States University Select Team. More... Keep Warm: R.I. Energy Solutions Expo at URI The Rhode
Cooperative Institute for Research in the Atmosphere College of ENGINEERING
Collett Jr., Jeffrey L.
Taylor/ATS 18 CIRA Magazine Contributors: Managing Editor: Mary McInnis-Efaw Designer: Maureen Murray Editor: Matt Rogers 2 CG/AR Product Evolution 4 NPS Seeing Clearer Air 6 Suomi NPP - 2 Years in Orbit 10 EMC, Robert Moorhead of Mississippi State Univ., Joe Tribbia of NCAR and Karen Yuen of JPL. The review
AIAA-2003-0862 INFLOW AND FATIGUE RESPONSE OF THE NWTC ADVANCED
pitch, rotor teeter, nacelle yaw and generator power. A total of 3299 10-minute records were collected. Sutherland Wind Energy Technology Department Sandia National Laboratory Albuquerque, NM 87185-0708 hjsuthe@sandia.gov Neil D. Kelley M. Maureen Hand NREL/National Wind Technology Center Golden, CO 80401 neil
Next-generation phenomics for the Tree of Life June 26, 2013 AVAToL
Kaufman 12 , Edith Law 13 , Jing Liu 14 , Lisa Moore 15 , Maureen A O'Leary 16 , Maria Passarotti 12 J, Julius M, Kaufman S, Law E, Liu J, Moore L, O'Leary MA, Passarotti M, Ranade S, Simmons NB
FACULTY OF ARTS Anthropology Mikael Haller (3.2.b)
Adult Education Maureen Coady (3.2.c) Leona English (3.2.a) Behrang Foroughi (3.2.c) Jonathan Langdon.2.b) Ping Zhou (3.2.b) School of Nursing Marion Alex (3.2.b) Diane Duff (3.2.b) Cathy MacDonald (3
David G. Eller Oceanography and Meteorology Building
David G. Eller Oceanography and Meteorology Building Building # 0443 EMERGENCY EVACUATION PLAN Prepared by Maureen Reap, Building Proctor October 4, 2011 #12;i TABLE OF CONTENTS INTRODUCTION a building. Examples of such occasions include: smoke/fires, gas leaks, and bomb threats. Planning
Edwards, Paul N.
10:55--Building Hope and Confronting Fear: Explorations in Detroit Christopher J. McLaurin, ",,Lift Gaines) Maureen Kellett, "Fixture of a Changing Landscape: A History of Detroits Michigan Central Station: The History of Black Hebrew Israelite Identity Development in Detroit" (Advisor Angela Dillard) David A
Martin, Timothy
, waxes) and respiration fluxes in southeastern U.S. pine forests Behzad Mortazavi,1,2,3 Maureen H. ConteCSC), and waxes (dCW)) and respiratory carbon (foliage (dCFR), soil (dCSR) and ecosystem 13 CO2 (dCER)) for two-alkanoic acid wax molecular cluster was twice that observed for dCOM and the predominant C2226 compound cluster
WASHINGTON UNIVERSITY Division of Biology and Biomedical Sciences
Eddy, Sean
. Elena Rivas, Dr. Todd Lowe, Robin Dowell, Robert Klein and Thomas Jones for their help with my computer
Implications of Comorbidity and Ascertainment Bias for Identifying Disease Genes
individual, comorbidity between two dis- orders, A and B, may occur for a variety of reasons [Klein and Riso
. Hsiung, Fermilab, Batavia, Illinois 60510 M. R. Adams, University of Illinois at Chicago, Chicago, Illinois 60680 R. Guo, D. M. Kaplan, Northern Illinois University, DeKalb, Illinois 60115 R. L. Mc as a signature of quarkÂgluon plasma formation[2], has generated renewed interest in the subject of hadron
an efficient source of spin-entangled EPR pairs Hanbury-Brown and Twiss (HBT) Australia 1916 -2002 Radio stars: R. Hanbury Brown and R. Q. Twiss, "A New Type of Interferometer for Use in Radio Astronomy", Philosophical Magazine (7) 45 p663 (1954) Optical:R. Hanbury Brown and R. Q. Twiss, "A Test of a New Type
Ritter, Frank
2008-01-01
amylase responses to the challenge. Daily caffeine use was verified by salivary caffeine levels (ng-reported daily caffeine use significantly predicted baseline heart rate and salivary alpha amylase, a surrogate.e., cortisol, DHEA-S, alpha amylase) but not cardiovascular (i.e., blood pressure, heart rate) responses
Pecon, Jill Maureen
1980-01-01
fulfillment of the requirement for the deSree of MASTER OF SCIENCE May 1980 Major Sub;ect: Oceanography THE EI'1'ECTS 01' HISTIDIJJE OIJ 'I'. !L' UPTAKE OI' CADMIUM I'ROM THE DIGESTIyi. SYSTIJM OF THE BLUE CRAB (CALLINFCTJ, S SAPIDUS, RATHBLR1) A Thesi.... s By JILL MAUREEN PECON Approved as to style and rontent by: Chaizin o f Commi-tf ee Member Member Member ~&I Mme+~. Head of Department May 1980 AB S TRACT The Effect of Histidine on the Uptake of Cadmium from the Digestive System of the Blue Crab...
Volume 72, Numbers 3 & 4 (Complete)
Dickson, Donald R.
2014-01-01
Nicky Hallett, The Senses in Religious Communities, 1600-1800: Early Modern “Convents of Pleasure.” Review by elena levy-navarro .................. 206 S u s a n n e Wo o d s , M i l t o n a n d t h e Po e t i c s o f F r e e d o m . Review... the Ancient s : The Fir s t Ita l ian Mythography. Review by catherine gimelli martin ........................................... 264 David Cast, ed. The Ashgate Research Companion to Giorgio Vasari. Review by maureen pelta, moore college of art and design...
Aune, M. G.
2014-01-01
Nicky Hallett, The Senses in Religious Communities, 1600-1800: Early Modern “Convents of Pleasure.” Review by elena levy-navarro .................. 206 S u s a n n e Wo o d s , M i l t o n a n d t h e Po e t i c s o f F r e e d o m . Review... the Ancient s : The Fir s t Ita l ian Mythography. Review by catherine gimelli martin ........................................... 264 David Cast, ed. The Ashgate Research Companion to Giorgio Vasari. Review by maureen pelta, moore college of art and design...
Maureen E. Mulvihill
2008-01-01
. & xiii + 586 pp. ?215. Oxford and New York: Oxford University Press, 2007. Cheryl Sawyer. The Winter Prince. New York and London: Signet Eclipse, New American Library, Penguin Group and Penguin Group Ltd., 2007. 384 pp. $14.00. Reviews by MAUREEN... of Richmond & Lennox (1622-1685), and Prince Rupert of the Rhine, that glamorous hero of the English Civil Wars and son of the unfortunate Elizabeth (Stuart) Electress Palatine, Bohemia?s ?Winter Queen?. Both of these new offerings?one a sober...
2008-01-01
153:185–192. nisms of green tea polyphenols in Alzheimer’sGreen CE, Krafft GA, Klein WL (1998) Diffusible, nonfibrillar ligands derived tea
THE ACCESS ALMANAC - Parking Charity
Shoup, Donald
2014-01-01
1243–1248. Eric Klein. 2010. “Parking Holiday Approved for8. Brandon Mathis. 2013. “Free Parking Downtown Not Loved byto Offer Free Downtown Parking for Two Weeks before
Litigation in Argentina: challenging the tobacco industry.
Flores, M L; Barnoya, J; Mejia, R; Alderete, E; Pérez-Stable, E J
2006-01-01
Liability Board Update: Argentina and Brazil. 12 Oct 1999.Tobacco litigation in Argentina Mairal H. Klein & Mairal.SA. Chadbourne & Parke. Argentina Status Chart. 19 Jul 1999.
RESEARCH ARTICLE 10.1002/2014GC005407
Kreemer1,2, Geoffrey Blewitt1,2, and Elliot C. Klein1,3 1 Nevada Bureau of Mines and Geology, University
The first (almost) half century of the TEXAS Symposia
Trimble, V; Trimble, V
2011-01-01
microwave background, gamma ray bursts.) perpetuated theradiation, extragalactic gamma ray bursts, Kaluza-Klein,1974 had a review of gamma ray burst models given by Mal
IceCube: A Cubic Kilometer Radiation Detector
Klein, S.; IceCube Collaboration
2008-01-01
Cubic Kilometer Radiation Detector The IceCube CollaborationA Cubic Kilometer Radiation Detector Spencer R. Klein, forlarge detector is to search for optical Cherenkov radiation
Kim, Jae-Han; Block, David E.; Mills, David A.
2010-01-01
Morel et al. 1999; Schick et al. 1999). The regulatoryBiochem Biotechnol 28– Schick J, Weber B, Klein JR, Henrich
Power Analysis Attacks against FPGA Implementations Shaohua Tang1
International Association for Cryptologic Research (IACR)
Power Analysis Attacks against FPGA Implementations of KLEIN Shaohua Tang1 , Jianhao Wu1 , Weijian not consider the potential attacks by power analysis methods. This paper presents power analysis attacks and complexity of our attacks via power analysis against KLEIN are discussed in detail. Besides
doi: 10.1149/1.3569920 2011, Volume 35, Issue 3, Pages 271-276.ECS Trans.
Rossi, Enrico
. Bardarson and Piet W. Brouwer Klein Tunneling in Graphene p-n-p Junctions service Email alerting click ECS - The Electrochemical Society #12;Klein tunneling in graphene p-n-p junctions E. Rossi1 , J. H of graphene p-n-p junctions. We first analyze the ideal case of a clean system and then study the realistic
Boyer, Edmond
that MgB2 belongs to an origi- nal class of superconductors in which two weakly coupled bands with very the existence of two distinct superconducting gaps. One of the main consequence of this two-band superconduc of the superconducting gaps with Al doping remains controversial. Whereas Gonnelli et al.15 sug- gested that the small
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
Dunn, John J.; McCorkle, Sean R.; Praissman, Laura A.; Hind, Geoffrey; Van der Lelie, Daniel; Bahou, Wadie F.; Gnatenko, Dmitri V.; Krause, Maureen K.
Genomic Signature Tags (GSTs) are the products of a method we have developed for identifying and quantitatively analyzing genomic DNAs. The DNA is initially fragmented with a type II restriction enzyme. An oligonucleotide adaptor containing a recognition site for MmeI, a type IIS restriction enzyme, is then used to release 21-bp tags from fixed positions in the DNA relative to the sites recognized by the fragmenting enzyme. These tags are PCR-amplified, purified, concatenated and then cloned and sequenced. The tag sequences and abundances are used to create a high resolution GST sequence profile of the genomic DNA. [Quoted from Genomic Signature Tags (GSTs): A System for Profiling Genomic DNA, Dunn, John J.; McCorkle, Sean R.; Praissman, Laura A.; Hind, Geoffrey; Van der Lelie, Daniel; Bahou, Wadie F.; Gnatenko, Dmitri V.; Krause, Maureen K., Revised 9/13/2002
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2011-02-07
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate from Nauru (ARMBE-CLDRAD TWPC2 V2.1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2010-08-11
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate Barrow, AK (ARMBE-CLDRAD NSAC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2012-05-14
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate Barrow, AK (ARMBE-CLDRAD NSAC1 V2.1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2010-08-11
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2011-02-07
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate from Manus Island, PNG (ARMBE-CLDRAD TWPC1 V2.1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2011-02-07
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2011-02-07
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate from Nauru (ARMBE-CLDRAD TWPC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2012-05-14
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate from Nauru (ARMBE-CLDRAD TWPC2)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2012-05-14
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate from Nauru (ARMBE-CLDRAD TWPC3)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2012-05-14
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate Lamont, OK (ARMBE-CLDRAD SGPC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2012-02-20
The ARM CMBE-CLDRAD [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected cloud and radiation relevant quantities from ACRF observations
ARM Climate Modeling Best Estimate Lamont, OK (ARMBE-CLDRAD SGPC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2012-05-14
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate from Darwin, AU (ARMBE-CLDRAD TWPC3 V2.1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2010-08-10
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2011-02-07
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
Ho, Tony
2012-01-01
and ED Rogdakis, "A Kalina power cycle driven by renewableSA Klein, "Absorption power cycles," Energy, vol. 21, pp.study of the Kalina power cycle in connection with a
GEOPHYSICS, VOL. 67, NO. 4 (JULY-AUGUST 2002); P. 11041114, 11 FIGS., 1 TABLE. 10.1190/1.1500371
Newman, Gregory A.
Laboratories, Geophysical Technology Department, P.O. Box 5800, MS-0750, Albuquerque, New Mexico 87185-0750. E this mechanism, Klein et al. (1997) show that the high-conductivity contrast between shales and sands results
ARM Climate Modeling Best Estimate From Darwin, AU (ARMBE-ATM TWPC3)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate Barrow, AK (ARMBE-ATM NSAC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate From Darwin, AU (ARMBE-ATM TWPC2)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate Lamont, OK (ARMBE-ATM SGPC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate From Manus Island, PNG (ARMBE-ATM TWPC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate Barrow, AK (ARMBE-ATM NSAC1 V4)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate From Nauru (ARMBE-ATM TWPC2)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
Circular dichroism of planar chiral magnetic metamaterials
Circular dichroism of planar chiral magnetic metamaterials M. Decker, M. W. Klein, and M. Wegener 78002); published March 5, 2007 We propose, fabricate, and study a double-layer chiral planar
Electronic structures of reconstructed zigzag silicene nanoribbons
Ding, Yi E-mail: wangyanli-04@tsinghua.org.cn; Wang, Yanli E-mail: wangyanli-04@tsinghua.org.cn
2014-02-24
Edge states and magnetism are crucial for spintronic applications of nanoribbons. Here, using first-principles calculations, we explore structural stabilities and electronic properties of zigzag silicene nanoribbons (ZSiNRs) with Klein and pentagon-heptagon reconstructions. Comparing to unreconstructed zigzag edges, deformed bare pentagon-heptagon ones are favored under H-poor conditions, while H-rich surroundings stabilize di-hydrogenated Klein edges. These Klein edges have analogous magnetism to zigzag ones, which also possess the electric-field-induced half-metallicity of nanoribbons. Moreover, diverse magnetic states can be achieved by asymmetric Klein and zigzag edges into ZSiNRs, which could be transformed from antiferromagnetic-semiconductors to bipolar spin-gapless-semiconductors and ferromagnetic-metals depending on edge hydrogenations.
NavigatingInterdisciplinaryCareers Professional and Academic Development (PAD) Seminar Series
Finley Jr., Russell L.
NavigatingInterdisciplinaryCareers Professional and Academic Development (PAD) Seminar Series development and interdisciplinary research Strategies for multiple careers Strategies for tenure and promotion Klein, Faculty Fellow for Interdisciplinary Development, Division of Research and Professor
Falge, Eva
Brennstoffzelle, die im Mittelpunkt des ProBio-Projekts steht: Bei Brennstoffzellen handelt es sich um kleine zusammenkommen. BRENNSTOFFZELLE ERHÖHT DIE STROMAUSBEUTE Auch bei der Behandlung der Biomasse geben sich die Max
Real fish, real numbers, real jobs (A subscription for Intelligencer is needed to follow this link) Portraits of Gauss for sale, also Klein bottles for all your needs, etc
The Origins of Korean Adoption: Cold War Geopolitics and Intimate Diplomacy
Kim, E
2015-01-01
Klein, Christina. 2003. Cold War Orientalism: Asia in theJanuary. ––––. 1953a “First Korean War Baby Brought Here byRace and the Post-World-War-II Translation of ‘American. ’”
Nonorientable spacetime tunneling
González-Diáz, P F; Gonzalez-Diaz, Pedro F.; Garay, Luis J.
1999-01-01
Misner space is generalized to have the nonorientable topology of a Klein bottle, and it is shown that in a classical spacetime with multiply connected space slices having such a topology, closed timelike curves are formed. Different regions on the Klein bottle surface can be distinguished which are separated by apparent horizons fixed at particular values of the two angular variables that eneter the metric. Around the throat of this tunnel (which we denote a Klein bottlehole), the position of these horizons dictates an ordinary and exotic matter distribution such that, in addition to the known diverging lensing action of wormholes, a converging lensing action is also present at the mouths. Associated with this matter distribution, the accelerating version of this Klein bottlehole shows four distinct chronology horizons, each with its own nonchronal region. A calculation of the quantum vacuum fluctuations performed by using the regularized two-point Hadamard function shows that each chronology horizon nests a...
Srinivasan, Mahesh; Snedeker, Jesse
2011-01-01
A. , Morris, R. K. , & Rayner, K. (1988). Lexical ambiguity29(2), 269–288. Frazier, L. , & Rayner, K. (1990). Taking onPoeppel, 2005; Frazier & Rayner, 1990; Klein & Murphy, 2001,
EFDA(05)-27/4.10 revision 1 (revision 0: STAC 10/4.1)
) Klein M. (SCK-CEN) Klimm M. (EFET) Kruessmann R. (FZK) Lackner K. (IPP) Lechon Y. (CIEMAT) Li Puma A) Röhlich K. (EFET) Rollet S. (Microrays) Saez R. (CIEMAT) Saibene G. (EFDA) Salomaa R. (TEKES) Scalzullo A
Clifford Algebras Applications to Mathematics,
Ablamowicz, Rafal
algebras in classical mechanics and general relativity. Twistor and octon- ionic methods, electromagnetism and gravity, elementary particle physics, noncommutative physics, Dirac's equation, quantum spheresKlein geometry, pose estimation, and implementations of Clifford algebra co- processor design. While the papers
COMMUNITYMAGAZINE VAN DE UGENT De duurzaamheidsvisie
Gent, Universiteit
;2 DURF DENKEN 3D-PRINTING `CREATIVITEIT WORDT WERKELIJKHEID, LAAG NA LAAG' #12;3 Studenten laten maken. We onderzoeken nu ook hoe we 3D-printing kunnen inzetten in de productie van kleine reeksen
Project ELLA: English Language and Literacy Acquisition
Lara-Alecio, Rafael; Irby, Beverly J.; Mathes, Patricia G.; Rodriguez, Rosalinda; Tong, Fuhui; Guerrero, Cindy; Quiros, Ana; Cox, Kathleen; Castellanos, Mary
2010-10-22
District; Fuhui Tong, Texas A&M University; Cindy Guerrero, Ana Quiros, Kathleen Cox, and Mary Castellanos, Coordinators This project is funded by Institution of Education Sciences, DOE R305P030032 WALLER ISD TOMBALL ISD KLEIN ISD CYPRESS...
A Feminist Dialogue on Theatre for Young Audiences through Suzan Zeder's Plays.
Klein, Jeanne; Austin, Gayle; Zeder, Suzan; Still, James; Smith, Iris
1997-01-01
Klein and Austin share perceptions of Theatre for Young Audiences and discuss three plays by Suzan Zeder using feminist dramatic criticism. Zeder responded from her playwright's perspective. Subsequently, playwright James ...
The Cubic Dirac Equation: Small Initial Data in H1(R3)
Bejenaru, I; Herr, S
2015-01-01
for homogeneous wave-equations, Math. Z. 120 (1971), 93–106.semilinear Klein-Gordon equations with small weakly decayingComm. Partial Differential Equations 25 (2000), no. 11-12,
Robert Morris : from a crisis in vision to a vision of crisis
Snyder, Benjamin Andrews
2012-01-01
Neo-Dada: A Critique of Pop Art." Art Journal 23.3 Klein,2002): 38- Lippard, Lucy R. Pop Art: With Contributions byPop, Minimalism, and Performance 1958 – 1964, (Whitney Museum of American Art,
State Prisoners' Rights to Medical Treatment: Merely Elusive or Wholly Illusory
Martin, Damon
1983-01-01
man- kind' "); Klein, Prisoners'Rights to Health Care, supraat 12 n.71. Note, Prisoners'Rights, 69 GEO. L.J. 591, 609-Medical Treatment of Prisoners as Cruel and Unusual
Invariant classification of orthogonally separable Hamiltonian systems in Euclidean space
Joshua T. Horwood; Raymond G. McLenaghan; Roman G. Smirnov
2006-05-07
The problem of the invariant classification of the orthogonal coordinate webs defined in Euclidean space is solved within the framework of Felix Klein's Erlangen Program. The results are applied to the problem of integrability of the Calogero-Moser model.
ARM Climate Modeling Best Estimate From Manus Island, PNG (ARMBE-ATM TWPC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2012-05-14
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate From Darwin, AU (ARMBE-ATM TWPC2)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2013-12-26
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate Barrow, AK (ARMBE-ATM NSAC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2010-10-05
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate From Manus Island, PNG (ARMBE-ATM TWPC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2013-12-26
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate Barrow, AK (ARMBE-ATM NSAC1 V4)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2013-12-26
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate From Darwin, AU (ARMBE-ATM TWPC3)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2013-12-26
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate From Nauru (ARMBE-ATM TWPC2)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2010-10-05
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate Lamont, OK (ARMBE-ATM SGPC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2013-12-26
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate Lamont, OK (ARMBE-ATM SGPC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2012-05-14
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate From Darwin, AU (ARMBE-ATM TWPC3)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2010-10-05
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate From Manus Island, PNG (ARMBE-ATM TWPC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2010-10-05
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate From Darwin, AU (ARMBE-ATM TWPC3)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2013-12-27
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate Lamont, OK (ARMBE-ATM SGPC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
2011-12-13
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
Probing Universal Extra Dimension at the International Linear Collider
Gautam Bhattacharyya; Paramita Dey; Anirban Kundu; Amitava Raychaudhuri
2005-09-02
In the context of an universal extra-dimensional scenario, we consider production of the first Kaluza-Klein electron positron pair in an $e^+e^-$ collider as a case-study for the future International Linear Collider. The Kaluza-Klein electron decays into a nearly degenerate Kaluza-Klein photon and a standard electron, the former carrying away missing energy. The Kaluza-Klein electron and photon states are heavy with their masses around the inverse radius of compactification, and their splitting is controlled by radiative corrections originating from bulk and brane-localised interactions. We look for the signal event $e^+e^- +$ large missing energy for $\\sqrt s = 1$ TeV and observe that with a few hundred fb$^{-1}$ luminosity the signal will be readily detectable over the standard model background. We comment on how this signal may be distinguished from similar events from other new physics.
ARM Climate Modeling Best Estimate Lamont, OK (ARMBE-CLDRAD SGPC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-CLDRAD [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected cloud and radiation relevant quantities from ACRF observations
ARM Climate Modeling Best Estimate from Nauru (ARMBE-CLDRAD TWPC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate from Darwin, AU (ARMBE-CLDRAD TWPC3 V2.1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate from Nauru (ARMBE-CLDRAD TWPC3)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate from Manus Island, PNG (ARMBE-CLDRAD TWPC1 V2.1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate from Nauru (ARMBE-CLDRAD TWPC2)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate Barrow, AK (ARMBE-CLDRAD NSAC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate Lamont, OK (ARMBE-CLDRAD SGPC1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate from Nauru (ARMBE-CLDRAD TWPC2 V2.1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
ARM Climate Modeling Best Estimate Barrow, AK (ARMBE-CLDRAD NSAC1 V2.1)
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
McCoy, Renata; Xie, Shaocheng
The ARM CMBE-ATM [Xie, McCoy, Klein et al.] data file contains a best estimate of several selected atmospheric quantities from ACRF observations and NWP analysis data.
Energy-momentum relation for solitary waves of nonlinear Dirac equations
T. V. Dudnikova
2014-04-28
Solitary waves of nonlinear Dirac, Maxwell-Dirac and Klein-Gordon-Dirac equations are considered. We prove that the energy-momentum relation for solitary waves coincides with the Einstein energy-momentum relation for point particles.
Humphrey, Judith M.; Ray, Doris H.; Hassall, Albert; Doss, Mildred A.
1951-01-01
diagnosis,from Ternidens deminutus and Necator ameri- canus Ancylostoma duodenale mebendazole, human Ankylostoma duodenale human lung, clinical manifestations, review Ancylostoma duodenale larvicidal control, in- KLein, E., 1972 a Deutschland, Korean...
Characterization of a heat resistant beta-glucosidase as a new reporter in cells and mice
McCutcheon, Susan C.; Jones, Ken; Cumming, Sarah A.; Kemp, Richard; Ireland-Zecchini, Heather; Saunders, John C.; Houghton, Carol A.; Howard, Louise A.; Winton, Douglas J.
2010-06-22
, Cameron RA, Rast JP, Gregorians A, Davidson EH: Green fluorescent protein in the sea urchin: New experimental approaches to transcriptional regulatory analysis in embryos and larvae. Development 1997, 124:4649-4659. 20. Clayton E, Doupe DP, Klein AM...
Röder, Beate
's Ear (1997) Violoncello und Stimme (2003) Chris Dench ik(s)land[s] (1997/98) 14:30 Uhr Raum 158 Diotima dieser kleine Blinde jetzt wieder von vorn beginnt: Oder einfach ei
COMPARATIVE COSTS OF CALIFORNIA CENTRAL STATION ELECTRICITY
CALIFORNIA ENERGY COMMISSION COMPARATIVE COSTS OF CALIFORNIA CENTRAL STATION ELECTRICITY GENERATIONCann Please use the following citation for this report: Klein, Joel. 2009. Comparative Costs of California............................................................................................................................1 Changes in the Cost of Generation Model
O. Chavoya-Aceves
2004-09-25
The Hamilton-Jacobi method is generalized, both, in classical and relativistic mechanics. The implications in quantum mechanics are considered in the case of Klein-Gordon equation. We find that the wave functions of Klein-Gordon theory can be considered as describing the motion of an ensemble of particles that move under the action of the electromagnetic field alone, without quantum potentials, hidden uninterpreted variables, or zero point fields. The number of particles is not locally conserved.
Three dimensional finite element analysis of the flow of polymer melts
Jimack, Peter
Three dimensional finite element analysis of the flow of polymer melts R. Tencheva , T. Goughb , O.G, LS2 9JT, UK. b School of Engineering, Design & Technology, University of Bradford, Bradford, BD7 1DP.g.harlen@leeds.ac.uk (O.G. Harlen), p.k.jimack@leeds.ac.uk (P.K. Jimack), h.klein@leeds.ac.uk (D.H. Klein), m
Nonorientable spacetime tunneling
Pedro F. Gonzalez-Diaz; Luis J. Garay
1999-01-07
Misner space is generalized to have the nonorientable topology of a Klein bottle, and it is shown that in a classical spacetime with multiply connected space slices having such a topology, closed timelike curves are formed. Different regions on the Klein bottle surface can be distinguished which are separated by apparent horizons fixed at particular values of the two angular variables that eneter the metric. Around the throat of this tunnel (which we denote a Klein bottlehole), the position of these horizons dictates an ordinary and exotic matter distribution such that, in addition to the known diverging lensing action of wormholes, a converging lensing action is also present at the mouths. Associated with this matter distribution, the accelerating version of this Klein bottlehole shows four distinct chronology horizons, each with its own nonchronal region. A calculation of the quantum vacuum fluctuations performed by using the regularized two-point Hadamard function shows that each chronology horizon nests a set of polarized hypersurfaces where the renormalized momentum-energy tensor diverges. This quantum instability can be prevented if we take the accelerating Klein bottlehole to be a generalization of a modified Misner space in which the period of the closed spatial direction is time-dependent. In this case, the nonchronal regions and closed timelike curves cannot exceed a minimum size of the order the Planck scale.
Constraints on gauge-Higgs unification models at the LHC
Noriaki Kitazawa; Yuki Sakai
2015-09-16
We examine the possibility of observing the Kaluza-Klein gluons in gauge-Higgs unification models at the LHC with the energy sqrt{s}=14 TeV. We consider a benchmark model with the gauge symmetry SU(3)_C x SU(3)_W in five-dimensional space-time, where SU(3)_C is the gauge symmetry of the strong interaction and SU(3)_W is that for the electroweak interaction and a Higgs doublet field. It is natural in general to introduce SU(3)_C gauge symmetry in five-dimensional space-time as well as SU(3)_W gauge symmetry in gauge-Higgs unification models. Since the fifth dimension is compactified to S1/Z2 orbifold, there are Kaluza-Klein modes of gluons in low-energy effective theory in four-dimensional space-time. We investigate the resonance contribution of the first Kaluza-Klein gluon to dijet invariant mass distribution at the LHC, and provide signal-to-noise ratios in various cases of Kaluza-Klein gluon masses and kinematical cuts. Although the results are given in a specific benchmark model, we discuss their application to general gauge-Higgs unification models with Kaluza-Klein gluons. Gauge-Higgs unification models can be verified or constrained through the physics of the strong interaction, though they are proposed to solve the naturalness problem in electroweak symmetry breaking.
Improved Bounds on Universal Extra Dimensions
Thomas Flacke
2006-05-13
We report on recent constraints on models with a flat ``universal'' extra dimension in which all Standard Model fields propagate in the bulk. A significantly improved constraint on the compactification scale is obtained from the extended set of electroweak precision observables accurately measured at LEP1 and LEP2. We find a lower bound of 1/R > 700 (800) GeV at the 99% (95%) confidence level. Comparison of this constraint with the relic density of Kaluza-Klein dark matter for the Minimal UED model points towards the necessity of including non-minimal boundary terms which motivates studying alternative Kaluza-Klein dark matter candidates. Results for the one-loop induced magnetic dipole moment for Kaluza-Klein neutrino dark matter are presented. This talk is based on Phys.Rev.D73:095002,2006 and hep-ph/0601161.
Extra dimensions and Seesaw Neutrinos at the International Linear Collider
Tomoyuki Saito; Masaki Asano; Keisuke Fujii; Naoyuki Haba; Shigeki Matsumoto; Takehiro Nabeshima; Yosuke Takubo; Hitoshi Yamamoto; Koichi Yoshioka
2010-11-27
We study the capability of the international linear collider (ILC) to probe extra dimensions via the seesaw mechanism. In the scenario we study, heavy Kaluza-Klein neutrinos generate tiny neutrino masses and, at the same time, have sizable couplings to the standard-model particles. Consequently, a Kaluza-Klein tower of heavy neutrinos (N) can be produced and studied at the ILC through the process: e+e- -> vN followed by N -> Wl decay. We show that the single lepton plus two-jets final states with large missing energy from this signal process will provide a good opportunity to measure the masses and cross sections of Kaluza-Klein neutrinos up to the third level. Furthermore, the neutrino oscillation parameters can be extracted from the flavor dependence of the lowest-mode signals, which give us information about the origin of low-energy neutrino masses.
High-energy suppression of the Higgsstrahlung cross-section in the Minimal Composite Higgs Model
Katy Hartling; Heather E. Logan
2013-02-05
If the Higgs boson is composite, signs of this compositeness should appear via a formfactor-like suppression of Higgs scattering cross sections at momentum transfers above the compositeness scale. We explore this by computing the cross section for e+e- ---> ZH (Higgsstrahlung) in a warped five-dimensional gauge-Higgs unification model known as the Minimal Composite Higgs Model (MCHM). We observe that the Higgsstrahlung cross section in the MCHM is strongly suppressed compared to that in the Standard Model at center-of-mass energies above the scale of the first Kaluza-Klein excitations, due to cancellations among the contributions of successive Z boson Kaluza-Klein modes. We also show that the magnitude and sign of the coupling of the first Kaluza-Klein mode can be measured at a future electron-positron collider such as the proposed International Linear Collider or Compact Linear Collider.
McCann, Maureen (Director, Center for Direct Catalytic Conversion of Biomass to Biofuels); C3Bio Staff
2011-11-03
'Moving from Petroleum to Plants to Energize our World' was submitted by the Center for Direct Catalytic Conversion of Biomass to Biofuels (C3Bio) to the 'Life at the Frontiers of Energy Research' video contest at the 2011 Science for Our Nation's Energy Future: Energy Frontier Research Centers (EFRCs) Summit and Forum. Twenty-six EFRCs created short videos to highlight their mission and their work. C3Bio, an EFRC directed by Maureen McCann at Purdue University is a partnership between five institutions: Purdue (lead), Argonne National Laboratory, National Renewable Energy Laboratory, Northeastern University, and the University of Tennessee. The Office of Basic Energy Sciences in the U.S. Department of Energy's Office of Science established the 46 Energy Frontier Research Centers (EFRCs) in 2009. These collaboratively-organized centers conduct fundamental research focused on 'grand challenges' and use-inspired 'basic research needs' recently identified in major strategic planning efforts by the scientific community. The overall purpose is to accelerate scientific progress toward meeting the nation's critical energy challenges.
Linear harmonic oscillator in spaces with degenerate metrics
N. A. Gromov
2006-03-02
With the help of contraction method we study the harmonic oscillator in spaces with degenerate metrics, namely, on Galilei plane and in the flat 3D Cayley-Klein spaces $R_3(j_2,j_3).$ It is shown that the inner degrees of freedom are appeared which physical dimensions are different from the dimension of the space.
External noise yields a What template?
Klein, Stanley
External noise yields a surprise: What template? Stanley Klein, Dennis Levi, Suko Toyofuku Vision Science University of California, Berkeley #12;Overview Detection of patterns in noise Why noise masking is a powerful technique The Lu-Dosher framework: useful black boxes Graham-Nachmias experiment in noise (detect
FrontiersinEcology and the Environment
Paxton, Robert
for the pollination of fruit, vegetable, oil, seed, and nut crops (Free 1993). The global economic value of wild and managed pollination services was US$215 billion in 2005, representing 9.5% of global food production value-plant species globally (Klein et al. 2007). The culti- vated area of insect-dependent crops has increased world
New sensitivity analysis subordinated to a Jean-Claude Fort
Boyer, Edmond
, Sobol indices Introduction From more than one decade, uncertainty propagation and sensitivity analysisNew sensitivity analysis subordinated to a contrast Jean-Claude Fort , Thierry Klein , Nabil Rachdi May 8, 2013 Abstract In a model of the form Y = h(X1, . . . , Xd) where the goal is to es- timate
Ryan, Michael J.
of robotics in animal behaviour RYAN C. TAYLOR*, BARRETT A. KLEIN, JOEY STEIN & MICHAEL J. RYAN§ *Science pustulosus; robotics; sexual selection; tu´ngara frog; visual cue A long-standing interest in animal (Tinbergen & Perdeck 1950; Searcy 1998; McLister 2003), manually controlled robots (Brown & Kiely 1974
Nominalization, Predication and Type Containment
Kamareddine, Fairouz
of Eindhoven, for their nancial support and hospitality during the academic year 1991{92. yKlein's work has by the uk Economic and Social Research Council. 1 #12;Abstract In an attempt to accommodate natural language, by assigning each expression a family of types. Another line of work has moved in the direction of type
SST spatial anisotropic covariances from METOP-AVHRR data
Boyer, Edmond
of SST data to track, characterize and reconstruct mesoscale dynamics (cf. Klein et al. (2009); Isern et and modeling of mesoscale SST variability appears crucial to provide interpolation priors. The temporal)). However, to our knowledge, no study has explored thor- oughly at a global-scale these mesoscale spatial
Transformaciones Sin duda, el concepto de funcin juega un papel fundamental en todas las ramas de
Aíza, Ricardo Gómez
, en el axioma "todos los ángulos rectos son iguales", en la palabra "iguales" se incluye la idea de aislamiento del concepto de función, la generalidad de la noción que englobaba cosas al parecer distantes imposible que lo aprecie. Pero el punto es que, de alguna manera, Klein dijo: para hacer geometría es
Boundary lubrication under water Wuge H. Briscoe1
Klein, Jacob
LETTERS Boundary lubrication under water Wuge H. Briscoe1 , Simon Titmuss1 , Fredrik Tiberg1 {, Robert K. Thomas1 , Duncan J. McGillivray1 { & Jacob Klein1,2 Boundary lubrication, in which the rubbing. This process, wide- spread in engineering applications, is also predicted to occur in biological lubrication
Line geometry and electromagnetism III: groups of transformations
D. H. Delphenich
2014-04-16
The role of linear and projective groups of transformations in line geometry and electromagnetism is examined in accordance with Klein's Erlanger Programm for geometries. The group of collineations of real projective space is chosen as the most general group, and reductions to some of its various subgroups are then detailed according to their relevance to electromagnetic fields, and especially wave-like ones.
Integrable cases of gravitating static isothermal fluid spheres
B. V. Ivanov
2001-07-17
It is shown that different approaches towards the solution of the Einstein equations for a static spherically symmetric perfect fluid with a gamma-law equation of state lead to an Abel differential equation of the second kind. Its only integrable cases at present are flat spacetime, de Sitter solution and its Buchdahl transform, Einstein static universe and the Klein-Tolman solution.
Ideal gas matching for thermal Galilean holography
Jose L. F. Barbon; Carlos A. Fuertes
2009-03-26
We exhibit a nonrelativistic ideal gas with a Kaluza-Klein tower of species, featuring a singular behavior of thermodynamic functions at zero chemical potential. In this way, we provide a qualitative match to the thermodynamics of recently found black holes in backgrounds with asymptotic nonrelativistic conformal symmetry.
A PORTAL FRAMEWORK ARCHITECTURE FOR BUILDING HEALTHCARE WEB-BASED APPLICATIONS
Andry, François
A PORTAL FRAMEWORK ARCHITECTURE FOR BUILDING HEALTHCARE WEB-BASED APPLICATIONS Francois Andry, Erik., Industriestraße 41, 69190 Walldorf, Germany karsten.klein@icw-global.com Keywords: Portal, Portlets, SOA, Security, Context Management, PHR, EHR, Care Disease Management, Personalization. Abstract: Portals are Web
Stand-alone calculation tools are not the answer to embodied carbon assessment
Ariyaratne, Chamindika I.; Moncaster, Alice M.
2014-12-26
. Environ., vol. 10, no. 2, pp. 161–175, Mar. 2005. [13] R. D. De Kleine, G. A. Keoleian, and J. C. Kelly, “Optimal replacement of residential air conditioning equipment to minimize energy, greenhouse gas emissions, and consumer cost in the US,” Energy...
Organically modified silicate coatings for optical fibers A. B. Wojcik
Matthewson, M. John
Organically modified silicate coatings for optical fibers A. B. Wojcik L. C. Klein V. V. Rondinella been prepared to be used as protective coatings for optical fibers. The synthesis involves the reaction, solvent-free resins were obtained that hardened in seconds when exposed to UV radiation. The coating
Paris-Sud XI, Université de
CAMI-AFT: A SCIENTIFIC FIELD EXPERIMENT TO CALIBRATE REAL-TIME MONITORING SYSTEMS DEDICATED the source energy to the sensor energy. KEYWORDS: Microseismic monitoring, Post-mining risks. RESUME : les TO THE MANAGEMENT OF POST-MINING RISKS CONTRUCCI Isabelle1 , KLEIN Emmanuelle1 , BIGARRE Pascal1 , LIZEUR Armand1
Brain Topography, Volume 6, Number 1, 1993 79 Invertinga Laplacian TopographyMap
Klein, Stanley
Brain Topography, Volume 6, Number 1, 1993 79 Invertinga Laplacian TopographyMap StanleyA. Klein. An Excel spreadsheet implementation of the algorithm is presented. Key words: Topography; Laplacian; Inverse laplacian;Principal components. Introduction Many researchers who measure the topography of evoked
W.V.T. RUSCH ENGINEERING HONORS COLLOQUIUM SPRING 2009 SEMESTER
Zhou, Chongwu
6 CARMA- Observing our Universe with Millimeter Wave Eyes, Prof. Anneila I. Sargent, Benjamin M Research Laboratory, California Institute of Technology 13 Power to Change the World: Alternative Energy and the Rise of the Solar City, Dr. Suzanne Klein and Dr. Gani Ganapathi, Jet Propulsion Laboratory 20 Spring
Conducting Research in New York City Public Schools
Artemov, Sergei N.
Conducting Research in New York City Public Schools PROPOSAL GUIDELINES THE NEW YORK CITY DEPARTMENT OF EDUCATION Joel I. Klein, Chancellor #12;The New York City Department of Education Review Committee was established in 1980 to screen external requests to conduct research in New York City
Gauge-invariant metric fluctuations from NKK theory of gravity: de Sitter expansion
Jose Edgar Madriz Aguilar; Mariano Anabitarte; Mauricio Bellini
2005-10-20
In this paper we study gauge-invariant metric fluctuations from a Noncompact Kaluza-Klein (NKK) theory of gravity in a de Sitter expansion. We recover the well known result $\\delta\\rho/\\rho \\simeq 2\\Phi$, obtained from the standard 4D semiclassical approach to inflation. The spectrum for these fluctuations should be dependent of the fifth (spatial-like) coordinate.
Boundary-Layer Meteorol (2014) 150:107130 DOI 10.1007/s10546-013-9864-4
Xue, Ming
2014-01-01
Processes in Nocturnal Atmospheric Boundary Layer on Urban Ozone Concentrations Petra M. Klein · Xiao ozone. The prevalence of southerly winds and LLJs in the U.S. Southern Great Plains during summer makes on urban air quality. Ozone (O3) and nitrogen oxide concentrations measured at regulatory monitoring sites
Anderson, Paul R.
@wfu.edu Reynolda Documentary Film 2013-2015 Mark Hall hallma@wfu.edu Reynolda Bioethics 2013-2015 Michelle Roberts Documentary Film Chelsea Klein kleicl0@wfu.edu Reynolda English Andrew Kobin kobiaj9@wfu.edu Reynolda
Quantum dots and etch-induced depletion of a silicon two-dimensional electron gas
Coppersmith, Susan N.
Quantum dots and etch-induced depletion of a silicon two-dimensional electron gas L. J. Klein, K. L coupled quantum dots containing individual electrons whose spins act as qubits.4 We have made recent in a silicon quantum dot can be held constant for up to 11 hours. This fulfills an important milestone towards
CONFERENCE OF THE SOUTH AFRICAN SOCIETY FOR PLANT PATHOLOGY
THE 48TH CONFERENCE OF THE SOUTH AFRICAN SOCIETY FOR PLANT PATHOLOGY Prepared by Arista Fourie The South African Society for Plant Pathology held their 48th conference at the scenic ATKV, Klein Kariba as quarantine regulations. The conference was attended by about 160 members representing regions
The Human Cost THE RECENT ARTICLES ON THE LEGACY OF THE
Page, Roderic
that significant hurdles remain in Russia's attempt to decommission submarines and store nuclear waste. He also. SPENCER KLEIN Nuclear Science Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley Rusty Spur Drive, Tucson, AZ 85749, USA. E-mail: dvernon@us.ibm.com Decommissioning Russia's Nuclear
PHYSICAL REVIEW B 84, 195428 (2011) Semiclassical magnetotransport in graphene n-p junctions
Ullmo, Denis
2011-01-01
PHYSICAL REVIEW B 84, 195428 (2011) Semiclassical magnetotransport in graphene n- p junctions n-p junctions in the quantum Hall regime. This framework is known to experimentally exhibit, creating a n-p junction at the regions' interface, an ideal setup to study Klein tunneling. Using a strong
Lobachevsky geometry of (super)conformal mechanics
Tigran Hakobyan; Armen Nersessian
2008-03-15
We give a simple geometric explanation for the similarity transformation mapping one-dimensional conformal mechanics to free-particle system. Namely, we show that this transformation corresponds to the inversion of the Klein model of Lobachevsky space (non-compact complex projective plane). We also extend this picture to the N=2k superconformal mechanics described in terms of Lobachevsky superspace.
MATTHEW D. SHAPIRO Department of Economics home
Cafarella, Michael J.
MATTHEW D. SHAPIRO Department of Economics home: University of Michigan 2024 Vinewood Blvd Ann@umich.edu PRINCIPAL CURRENT POSITIONS Lawrence R. Klein Collegiate Professor of Economics, University of Michigan of Economic Research Editor, American Economic Journal: Economic Policy EDUCATION B.A. summa cum laude
Emission of scalar particles from cylindrical black holes
H. Gohar; K. Saifullah
2011-09-27
We study quantum tunneling of scalar particles from black strings. For this purpose we apply WKB approximation and Hamilton-Jacobi method to solve the Klein-Gordon equation for outgoing trajectories. We find the tunneling probability of outgoing charged and uncharged scalars from the event horizon of black strings, and hence the Hawking temperature for these black configurations.
Zhang, Yuwen
, June 25-27. Ibrahim, O. M., and Klein, S.A., 1989, "Optimum Power of Carnot and Lo- rentz Cycles," ASME Carnot Cycle," J. Chem. Phys., Vol. 74, pp. 3546-3560. Uehara, H., and Ikegami, Y., 1990, "Optimization Nucleaires, Arman Colin, Paris, pp. 41- 58. Curzon, F. L., and Ahlbom, B., 1975, "Efficiency of a Carnot
Stochastic Approximation: Sturen in een veranderende wereld
Bhulai, Sandjai
gedaan door middel van simulaties of experimenten. Twee bekende algoritmes binnen Stochastic Approximation zijn het Robbins- Monro algoritme en het Kiefer-Wolfowitz algoritme. Deze algoritmes benaderen formule is de kleine rekentijd en het gebruik van beperkte geheugenruimte. Echter, het algoritme hangt af
An early date for cattle from Namaqualand, South Africa
An early date for cattle from Namaqualand, South Africa: implications for the origins of herding in southern Africa Jayson Orton1 , Peter Mitchell2 , Richard Klein3 , Teresa Steele4 & K. Ann Horsburgh5 When did cattle come to South Africa? Radiocarbon dates on a newly found cow horn indicates a time
Learning Programs: A Hierarchical Bayesian Approach
Pratt, Vaughan
Michael I. Jordan Dan Klein #12;Motivating Application: Repetitive Text Editing I like programs, but I #12;Motivating Application: Repetitive Text Editing I like programs, but I wish programs would just #12;Motivating Application: Repetitive Text Editing I like programs, but I wish programs would just
Timelike reduction and T-duality
Scuro, Sante Rodolfo
1999-01-01
expressions for the Killing sailors in Anti-de Sitter spacetime of odd dimension with respect to the field reparametrization in the bosonic sector. In addition, we perform Kaluza-Klein reduction along the time direction of D = 10 type IIB theory to D = 9. Then...
A&A 486, 589596 (2008) DOI: 10.1051/0004-6361:20079228
California at Berkeley, University of
2008-01-01
magnetic flux tubes in the corona and the transport of solar energetic particles K.-L. Klein1, S. Krucker2 in the ecliptic plane suggests that the interplanetary field lines curve down to the ecliptic before reaching 1 AU of degrees in longitude even in simple impulsive particle events. In all events we studied, potential
JavaKollektionen Java Collection Framework
SchÃ¼rmann, Michael
459 JavaKollektionen Java Collection Framework Bereitstellung wichtiger Kollektionen (Listen Implementierung hÃ¤ufig benutzter Algorithmen (Suchen, Sortieren, kleines/grÃ¶Ã?tes Element, ...) Basis: java.util.Collection #12;460 Schnittstelle fÃ¼r alle Kollektionsklassen (1) Schnittstelle java.util.Collection GrÃ¶Ã?e der
Arndt, Holger
20 Kombination von C++ und Java 20.1 Java Native Interface (JNI) 20-3 (364) 20.1 Java Native Interface (JNI) Der Standardweg zur Kombination von C++ und Java ist das Java Native Interface (JNI), das Bestandteil des JDK ist. 20.1.1 C++-Funktionen aus Java aufrufen Â· Gegeben sei die folgende kleine C
Arndt, Holger
20 Kombination von C++ und Java 20.1 Java Native Interface (JNI) 20-3(378) 20.1 Java Native Interface (JNI) Der Standardweg zur Kombination von C++ und Java ist das Java Native Interface (JNI), das Bestandteil des JDK ist. 20.1.1 C++-Funktionen aus Java aufrufen Â· Gegeben sei die folgende kleine C
Arndt, Holger
20 Kombination von C++ und Java 20.1 Java Native Interface (JNI) 20-3 (360) 20.1 Java Native Interface (JNI) Der Standardweg zur Kombination von C++ und Java ist das Java Native Interface (JNI), das Bestandteil des JDK ist. 20.1.1 C++-Funktionen aus Java aufrufen Â· Gegeben sei die folgende kleine C
Atmos. Chem. Phys., 11, 421437, 2011 www.atmos-chem-phys.net/11/421/2011/
Kurapov, Alexander
-421-2011 © Author(s) 2011. CC Attribution 3.0 License. Atmospheric Chemistry and Physics A regional real of moist available energy for at- mospheric circulation and the major sink of atmospheric ki- netic energy energy, but only moderately increasing downward longwave radia- tive flux (Klein and Hartmann, 1993
COLLISIONS OF VORTEX FILAMENT PAIRS VALERIA BANICA, ERWAN FAOU, AND EVELYNE MIOT
Faou, Erwan
COLLISIONS OF VORTEX FILAMENT PAIRS VALERIA BANICA, ERWAN FAOU, AND EVELYNE MIOT Abstract. We consider the problem of collisions of vortex filaments for a model introduced by Klein, Majda and Damodaran [KMD95] and Zakharov [Z88, Z99] to describe the interaction of almost parallel vortex filaments
On the generalized continuity equation
Arbab I. Arbab; Hisham. M. Widatallah
2010-02-27
A generalized continuity equation extending the ordinary continuity equation has been found using quanternions. It is shown to be compatible with Dirac, Schrodinger, Klein-Gordon and diffusion equations. This generalized equation is Lorentz invariant. The transport properties of electrons are found to be governed by Schrodinger-like equation and not by the diffusion equation.
Skadron, Kevin
and Sampling John W. Haskins, Jr. Kevin Skadron Department of Computer Science University of Virginia Charlottesville, VA 22904 fpredator,skadrong@cs.virginia.edu AJ KleinOsowski David J. Lilja Department of Electrical & Computer Engineering University of Minnesota 200 Union St. S.E. Minneapolis, MN 55455 fajko
ADVANCED OPTICS II, PHYC/ECE 554, UNM Spring 2009 Instructor: Mani Hossein-Zadeh
New Mexico, University of
ADVANCED OPTICS II, PHYC/ECE 554, UNM Spring 2009 Instructor: Mani Hossein-Zadeh Office hour book: "Introduction to Optics", 3rd edition. F.L. Pedrotti, L.S. Pedrotti, L.M. Pedrotti Other references: 1-"Introdution to Fourier Optics", Joseph W. Goodman, 3rd edition. 2-"Optics", Miles V. Klein
Late Pleistocene Human Subsistence in Northern Africa: The State of our Knowledge and Placement
limited knowledge about human paleoecology from other parts of the continent. This chapter aims to reviewBrearty and Brooks 2000; Henshilwood and Marean 2003; Mellars 2006; Klein 2009). Paleoecological investi- gations and paleoecology and modern human origins is based on South African sites. This region possesses an abundance
Manuscript submitted to Website: www.aimSciences.org Supplement Volume 2007 pp. 14
Stavrakakis, Nikolaos M.
) - (4) models the Upper Hybrid Heating (UHH) scheme for plasmas in fusion devices. (UHH) is the dominant and Stellarators, consti- tutes a basic method of plasma build-up and heating. The celebrated Zakharov system ATTRACTOR FOR A KLEIN-GORDON-SCHR¨ODINGER TYPE SYSTEM Marilena N. Poulou and Nikolaos M. Stavrakakis
The branching programme of mouse lung development
Krasnow, Mark A.
ARTICLES The branching programme of mouse lung development Ross J. Metzger1 {, Ophir D. Klein2 {, Gail R. Martin2 & Mark A. Krasnow1 Mammalian lungs are branched networks containing thousands by three geometrically simple local modes of branching used in three different orders throughout the lung
Coulomb scattering for scalar field in Scr\\" odinger picture
Crucean Cosmin; Racoceanu Radu; Pop Adrian
2008-04-11
The scattering of a charged scalar field on Coulomb potential on de Sitter space-time is studied using the solution of the free Klein-Gordon equation. We find that the scattering amplitude is independent of the choice of the picture and in addition the total energy is conserved in the scattering process.
Impact of Low-Level Jets on the Nocturnal Urban Heat Island Intensity in Oklahoma City
Xue, Ming
Impact of Low-Level Jets on the Nocturnal Urban Heat Island Intensity in Oklahoma City XIAO-MING HU Center for Analysis and Prediction of Storms, University of Oklahoma, Norman, Oklahoma PETRA M. KLEIN AND MING XUE Center for Analysis and Prediction of Storms and School of Meteorology, University of Oklahoma
Cellular automorphisms and self duality Lowell Abrams
Slilaty, Daniel
Cellular automorphisms and self duality Lowell Abrams and Daniel Slilaty August 3, 2013 Dedicated cellular automorphisms of the sphere, projective plane, torus, Klein bottle, and three-crosscaps (Dyck irreducible cellular automorphisms in S. 1 Introduction 2 2 Cellular automorphisms 5 2.1 Graph basics
Cellular automorphisms and self duality Lowell Abrams
Abrams, Lowell
Cellular automorphisms and self duality Lowell Abrams and Daniel Slilaty August 8, 2012 Dedicated cellular automorphisms of the sphere, projective plane, torus, Klein bottle, and three-crosscaps (Dyck irreducible cellular automorphisms in S. 1 Introduction 2 2 Cellular automorphisms 5 2.1 Graph basics
J. Differential Equations 250 (2011) 690709 Contents lists available at ScienceDirect
Cheng, Bin
2011-01-01
J. Differential Equations 250 (2011) 690709 Contents lists available at ScienceDirect Journal rotating shallow water system Bin Cheng, Chunjing Xie Department of Mathematics, University of Michigan secondary 76N10, 35L60 Keywords: Rotating shallow water system Classical solutions Global existence Klein
CDF/ANAL/TOP/PUBLIC/10048 version 1.0
Quigg, Chris
mechanisms such as Z bosons or Kaluza-Klein gluons. In the standard model, top quarks decay weakly before any are the numbers of opposite and same helicity events [3]. This analysis measures fo by fitting the helicity angle CDF measurement [5] uses kinematic reconstruction in the dilepton sample to find the lepton and b
Müller, Dietmar
& Johnson 2001). Up to eleven different mechanisms are listed by Klein (1995) to explain the cause crustal and lithospheric structure data of intracontinental basins extracted from our global analysis data. Secondly, the crustal structure of these basins is put into a plate kinematic and geodynamic
Kunstmatige Intelligentie (AI) Hoofdstuk 4.1.4 van Russell/Norvig = [RN
Kosters, Walter
10001000100 01101011001 9 #12;AI--Genetische algoritmen Mutatie Bij mutatie wordt elke bit van een individu met een zekere (kleine) kans, de mutation rate, omgeklapt. Een andere optie is om van elk individu een potenti¨ele oplossing, bij- voorbeeld met een "hill-climber". 10 #12;AI--Genetische algoritmen Voorbeeld
ABP1 Mediates Auxin Inhibition of Clathrin-Dependent
Jones, Alan M.
,1,2,11 Ju¨ rgen Kleine-Vehn,1,2,11 Elke Barbez,1,2 Michael Sauer,1,2,12 Tomasz Paciorek,1,2 Pawel and Pharmacology, University of North Carolina, Chapel Hill, NC 27599, USA 9Institute for Applied Genetics and Cell
Freshman has GOP abuzz with talk of 2012 South Floridian a tea party darling
Fernandez, Eduardo
Freshman has GOP abuzz with talk of 2012 South Floridian a tea party darling By Sean Lengell candidate next year. Even a "West for president" movement has spread among conservative tea party supporters the retired Army lieutenant colonel defeated Democratic incumbent Ron Klein and became a nationwide tea party
Program Wednesday, May 15, 2013 UNIVERSITY of DELAWARE
Firestone, Jeremy
Program Wednesday, May 15, 2013 UNIVERSITY of DELAWARE Energy Institute Annual Symposium www.energy, Vice Provost Research Office 8:40 a.m. Introduction Mike Klein, Professor & Director UD Energy Institute Updates from Centers & Institutes - Rm 125 8:50 a.m. Institute for Energy Conversion Bill
Centrifugal deformations of the gravitational kink
Paolo Maraner; Jiannis K. Pachos
2008-11-29
The Kaluza-Klein reduction of 4d conformally flat spacetimes is reconsidered. The corresponding 3d equations are shown to be equivalent to 2d gravitational kink equations augmented by a centrifugal term. For space-like gauge fields and non-trivial values of the centrifugal term the gravitational kink solutions describe a spacetime that is divided in two disconnected regions.
Long-lived tendrils viscous entrainment
Gardel, Margaret
Long-lived tendrils in viscous entrainment Wendy W. Zhang Laura E. Schmidt* Physics & James Franck entrained by warm upwards flow in thermal boundary layer ·Entrainment stabilizes upwards flow Kumagai et al-layer liquid entrained as steady spout Cohen & Nagel 2002 Phys. Rev. Lett. Cohen 2004 Phys. Rev. E Kleine
TRIVIAL GEOGRAPHY IN GENETIC PROGRAMMING
Spector, Lee
Chapter 8 TRIVIAL GEOGRAPHY IN GENETIC PROGRAMMING Lee Spector1 and Jon Klein1,2 1Cognitive Science recommend the broader adoption of this form of "trivial geography" in genetic programming systems. Keywords: geography, locality, demes, symbolic regression, quantum computing 1. Geography All biological populations
TOWARDS A SYSTEMATIC REPOSITORY OF KNOWLEDGE ABOUT MANAGING COLLABORATIVE DESIGN CONFLICTS1
MARK KLEIN, PHD Center for Coordination Science Massachusetts Institute of Technology m as an augmentation of the MIT Process Handbook, that is designed to address these challenges. 1. The Challenge of dissemination of this knowledge in a systematized form. Conflict management is fundamentally a multi
Gravitational Cheshire effect: Nonminimally coupled scalar fields may not curve spacetime
Eloy Ayón-Beato; Cristián Martínez; Ricardo Troncoso; Jorge Zanelli
2005-06-07
It is shown that flat spacetime can be dressed with a real scalar field that satisfies the nonlinear Klein-Gordon equation without curving spacetime. Surprisingly, this possibility arises from the nonminimal coupling of the scalar field with the curvature, since a footprint of the coupling remains in the energy-momentum tensor even when gravity is switched off. Requiring the existence of solutions with vanishing energy-momentum tensor fixes the self-interaction potential as a local function of the scalar field depending on two coupling constants. The solutions describe shock waves and, in the Euclidean continuation, instanton configurations in any dimension. As a consequence of this effect, the tachyonic solutions of the free massive Klein-Gordon equation become part of the vacuum.
Dirac equation in low dimensions: The factorization method
J. A. Sanchez-Monroy; C. J. Quimbay
2014-09-30
We present a general approach to solve the (1+1) and (2+1)-dimensional Dirac equation in the presence of static scalar, pseudoscalar and gauge potentials, for the case in which the potentials have the same functional form and thus the factorization method can be applied. We show that the presence of electric potentials in the Dirac equation leads to a two Klein-Gordon equations including an energy-dependent potential. We then generalize the factorization method for the case of energy-dependent Hamiltonians. Additionally, the shape invariance is generalized for a specific class of energy-dependent Hamiltonians. We also present a condition for the absence of the Klein's paradox (stability of the Dirac sea), showing how Dirac particles in low dimensions can be confined for a wide family of potentials.
Jussi Ilmari Lindgren
2013-02-13
This paper defines an equation for causality. This equation is then combined with the postulates of quantum mechanics and mass-energy equivalence to produce a quantum mechanical telegrapher's equation and to reproduce the Schrodinger and Klein-Gordon equations. The incompressible Navier-Stokes equations and dynamic general equilibrium in economics (with an interpretation of a Nash equilibrium) are obtained when the equation of causality refers to itself, i.e. when the cause is its own effect. As it is shown that the Klein-Gordon equation is obtained by Wick rotating the cause vector with de Broglie angular frequency, this paper postulates an equation for Quantum Gravity, which relates the Navier-Stokes equations to the Einstein Field Equations of General Relativity.
Non-custodial warped extra dimensions at the LHC
Dillon, Barry M
2015-01-01
With the prospect of improved Higgs measurements at the LHC and at proposed future colliders such as ILC, CLIC and TLEP we study the non-custodial Randall-Sundrum model with bulk SM fields and compare brane and bulk Higgs scenarios. We compute the electroweak precision observables and argue that incalculable contributions to these, in the form of higher dimensional operators, could have a non-negligable impact. This could potentially reduce the bound on the lowest Kaluza-Klein gauge boson masses to the 5 TeV range, making these states detectable at the LHC. In a second part, we compute the misalignment between fermion masses and Yukawa couplings caused by vector-like Kaluza-Klein fermions. The deviation of the top Yukawa can easily reach 10%, making it observable at the high-luminosity LHC. Corrections to the bottom and tau Yukawa couplings can be at the percent level and detectable at ILC, CLIC or TLEP.
Susana Valdez-Alvarado; Ricardo Becerril; L. Arturo Urena-Lopez
2011-07-15
We solve numerically the Einstein-Klein-Gordon system with spherical symmetry, for a massive real scalar field endowed with a quartic self-interaction potential, and obtain the so-called $\\Phi^4$-oscillatons which is the short name for oscillating soliton stars. We analyze numerically the stability of such oscillatons, and study the influence of the quartic potential on the behavior of both, the stable (S-oscillatons) and unstable (U-oscillatons) cases under small and strong radial perturbations.
Latin American Theatre Review, Volume 31, Number 1: Book Reviews
1997-10-01
del manuscrito de Regules tiene dentro de la historiografía teatral rioplatense. Al describir cómo se encontró el manuscrito del Martín Fierro, Teodoro Klein señala cuáles son los datos que permiten verificar la legitimidad de la obra de Regules.... La otra obra publicada en este libro, El entenao, es precedida de un ensayo de Eneida Sansone de Martínez, en el que la investigadora destaca la evolución de Regules como autor teatral y su "vocación criollista," y contrasta el esquema actancial de...
Ravikumar, B.
SUMMER2004 S THE MAN BEHIND BACON AND EGGS #12;S O N O M A S T A T E U N I V E R S I T Y STUDENT Dusel-Bacon (BA, 1975, geology), research geologist for the U.S. Geological Survey; among others, visit to be honored Oct. 14 have been announced: Jim Ford, Douglas D. Gaffin and Martin Klein. FEATURES Bacon and Eggs
Dilatonic effects near naked singularities
J. R. Morris
2011-11-03
Static spherically symmetric solutions of 4d Brans-Dicke theory include a set of naked singularity solutions. Dilatonic effects near the naked singularities result in either a shielding or an antishielding effect from intruding massive test particles. One result is that for a portion of the solution parameter space, no communication between the singularity and a distant observer is possible via massive particle exchanges. Kaluza-Klein gravity is considered as a special case.
Fractional charges and Misner-Wheeler charge without charge effect in metamaterials
Igor I. Smolyaninov
2014-12-08
Optical space in metamaterials may be engineered to emulate four dimensional Kaluza-Klein theory. Nonlinear optics of such metamaterials mimics interaction of quantized electric charges. An electromagnetic wormhole is designed, which connects two points of such an optical space and changes its effective topology. Electromagnetic field configurations which exhibit fractional charges appear as a result of such topology change. Moreover, such effects as Misner-Wheeler charge without charge may be replicated.
Characteristics of a Marine Stratocumulus to Cumulus Cloud Transition
Zapalac, Allison
2014-12-08
of stratocumulus clouds are commonly observed as either solid or broken cloud decks in regions where warm, subsiding air is present over cooler sea surface temperatures (SSTs) (Klein and Hartmann 1993; Wood 2012). The strong subsidence helps to maintain...). There is also large-scale subsidence that occurs year-round over the southeastern Pacific Ocean, resulting in a quasi-permanent surface anticyclone that is centered roughly at 27°S, 90°W (Garreaud and Muñoz 2004). This subtropical high brings southern low...
Time delayed processes in physics, biophysics and archaeology
Magdalena Anna Pelc
2007-05-31
The motion of particles, where the particles: electrons, ions in microtubules or migrated peoples can be described as the superposition of diffusion and ordered waves. In this paper it is shown that the master equation for transport processes can be formulated as the time delayed hyperbolic partial equation. The equation describes the processes with memory. For characteristic times shorter than the relaxation time the master equation is the generalized Klein - Gordon equation. Key words: hyperbolic transport, microtubules, heat waves, Neolithic migration
Captulo 11 Equacoes Diferenciais Ordinarias. Uma Introducao
Barata, JoÃ£o Carlos Alves
as leis do Eletromagnetismo (equaâ?ºcâ?oes de Maxwell), da Mecâ??anica dos Fluidos (equaâ?ºcâ?oes de Euler e de as leis da Fâ??ï¿½sica se expressam. Um exemplo bâ??asico â??e a segunda lei de Newton da Mecâ??anica Clâ??assica, que NavierÂStokes), da Mecâ??anica Quâ??antica (equaâ?ºcâ?oes de SchrË?odinger, de KleinÂGordon e de Dirac), da
Entropy evolution in warm inflation from a 5D vacuum
Jesus Martin Romero; Mauricio Bellini
2009-12-15
Using some ideas of Modern Kaluza-Klein theory, we examine the evolution of entropy on a 4D Friedmann-Robertson-Walker (FRW) brane from a 5D vacuum state, which is defined on a 5D background Riemann-flat metric. We found that entropy production is sufficiently important during inflation: $S > 10^{90}$, for all the initial values of temperature $T_0 < T_{GU}$.
Foundation of Hydrodynamics of Strongly Interacting Systems
Cheuk-Yin Wong
2014-04-03
Hydrodynamics and quantum mechanics have many elements in common, as the density field and velocity fields are common variables that can be constructed in both descriptions. Starting with the Schroedinger equation and the Klein-Gordon for a single particle in hydrodynamical form, we examine the basic assumptions under which a quantum system of particles interacting through their mean fields can be described by hydrodynamics.
Temperature dependence of mean number of of e-h pairs per eV of x-ray energy deposit
values very close to this, for example 1.12 eV (commonly) and 1.107 eV (Handbook of Chemistry and Physics Paper Material a Plotted? w (130 K) w (170 K) Comments Klein 68 [5] Many 14/5 Yes 0.099 0.081 Theory.87, Ryan (73) a = 2.77, Ryan (73) EG&G catalog Figure 1. w(T) for selected values of a. A list of values
Foundation of Hydrodynamics of Strongly Interacting Systems
Wong, Cheuk-Yin
2014-01-01
Hydrodynamics and quantum mechanics have many elements in common, as the density field and velocity fields are common variables that can be constructed in both descriptions. Starting with the Schroedinger equation and the Klein-Gordon for a single particle in hydrodynamical form, we examine the basic assumptions under which a quantum system of particles interacting through their mean fields can be described by hydrodynamics.
A. Jadbabaie PhD 2001, Caltech
Plotkin, Joshua B.
A. Jadbabaie PhD 2001, Caltech J.C. Doyle PhD 1984,Berkeley D.E. Sarason PhD 1963, Michigan P. R. Halmos PhD 1938, UIUC J.L. Doob PhD 1932, Harvard J. L. Walsh PhD 1920, Harvard M. Bocher PhD 1891, Gottingen G. Birkhoff PhD 1907, Chicago C.F. Klein, PhD RheinischeFriedrich Wilhelms Universität Bonn 1868 J
ST 745{001: Analysis of Survival Data Spring, 2005
Zhang, Daowen
ST 745{001: Analysis of Survival Data Spring, 2005 Textbook 1. Survival Analysis: Techniques://www.biostat.mcw.edu/homepgs/klein/book.html contains some data sets and SAS macros used in the book) 2. Survival Analysis Using The SAS System: A Practical Guide by Paul D. Allison (data sets and macros used in the book can be found from http://www.sas
Sudden singularities survive massive quantum particle production
J. D. Barrow; A. B. Batista; G. Dito; J. C. Fabris; M. J. S. Houndjo
2012-06-28
We solve the Klein-Gordon equation for a massive, non-minimally coupled scalar field, with a conformal coupling, undergoing cosmological evolution from a radiation-dominated phase to a future sudden singularity. We show that, after regularisation, the energy of the created particles is zero and the back-reaction from quantum effects does not change the evolution of the universe near the future singularity and cannot prevent the finite-time sudden singularity.
What is a reindeer? Indigenous perspectives from northeast Siberia
Vitebsky, Piers; Alekseyev, Anatoly
2014-06-26
qualifications) that they compete directly for pasture and there is a general inverse correlation between them: domestic reindeer increase at the expense of wild reindeer, and vice versa (Klein 1980). Some of the same managerial concepts used in managing wild... . Even the remotest women are now taken by helicopter to hospital to give birth, so their babies are no longer smeared with fresh reindeer blood; and the edjok, guardian spirit of the herd, became obsolete when the herd was collectivised and turned...
Quantum singularities in (2+1) dimensional matter coupled black hole spacetimes
Unver, O.; Gurtug, O.
2010-10-15
Quantum singularities considered in the 3D Banados-Teitelboim-Zanelli (BTZ) spacetime by Pitelli and Letelier [Phys. Rev. D 77, 124030 (2008)] is extended to charged BTZ and 3D Einstein-Maxwell-dilaton gravity spacetimes. The occurrence of naked singularities in the Einstein-Maxwell extension of the BTZ spacetime both in linear and nonlinear electrodynamics as well as in the Einstein-Maxwell-dilaton gravity spacetimes are analyzed with the quantum test fields obeying the Klein-Gordon and Dirac equations. We show that with the inclusion of the matter fields, the conical geometry near r=0 is removed and restricted classes of solutions are admitted for the Klein-Gordon and Dirac equations. Hence, the classical central singularity at r=0 turns out to be quantum mechanically singular for quantum particles obeying the Klein-Gordon equation but nonsingular for fermions obeying the Dirac equation. Explicit calculations reveal that the occurrence of the timelike naked singularities in the considered spacetimes does not violate the cosmic censorship hypothesis as far as the Dirac fields are concerned. The role of horizons that clothes the singularity in the black hole cases is replaced by repulsive potential barrier against the propagation of Dirac fields.
Robert R. Lompay; Alexander N. Petrov
2013-07-01
Arbitrary diffeomorphically invariant metric-torsion theories of gravity are considered. It is assumed that Lagrangians of such theories contain derivatives of field variables (tensor densities of arbitrary ranks and weights) up to a second order only. The generalized Klein-Noether methods for constructing manifestly covariant identities and conserved quantities are developed. Manifestly covariant expressions are constructed without including auxiliary structures like a background metric. In the Riemann-Cartan space, the following \\emph{manifestly generally covariant results} are presented: (a) The complete generalized system of differential identities (the Klein-Noether identities) is obtained. (b) The generalized currents of three types depending on an arbitrary vector field displacements are constructed: they are the canonical Noether current, symmetrized Belinfante current and identically conserved Hilbert-Bergmann current. In particular, it is stated that the symmetrized Belinfante current does not depend on divergences in the Lagrangian. (c) The generalized boundary Klein theorem (third Noether theorem) is proved. (d) The construction of the generalized superpotential is presented in details, and questions related to its ambiguities are analyzed.
Harling, B v
2010-01-01
In this thesis, we study throats in the early, hot universe. Throats are a common feature of the landscape of type IIB string theory. If a throat is heated during cosmological evolution, energy is subsequently transferred to other throats and to the standard model. We calculate the heat transfer rate and the decay rate of throat-localized Kaluza-Klein states in a ten-dimensional model. For the calculation, we employ the dual description of the throats in terms of gauge theories. We discuss modifications of the decay rate which arise in flux compactifications and for Klebanov-Strassler throats and emphasize the role of tachyonic scalars in such throats in mediating decays of Kaluza-Klein modes. Our results are also applicable to the energy transfer from the heated standard model to throats. We determine the resulting energy density in throats at our epoch in dependence of their infrared scales and of the reheating temperature. The Kaluza-Klein modes in the throats decay to other sectors with a highly suppresse...
DRAFT ADVICE - UNACCEPTABLE PROGRAM IMPACTS UNDER FY 97 BUDGET
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalent Bonding Low-Cost2 DOE HQSiteo n n eDPF 2004200 Area Keith Klein,
DRAFT ADVICE - UNACCEPTABLE PROGRAM IMPACTS UNDER FY 97 BUDGET
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalent Bonding Low-Cost2 DOE HQSiteo n n eDPF 2004200 Area Keith Klein,
DRAFT ADVICE - UNACCEPTABLE PROGRAM IMPACTS UNDER FY 97 BUDGET
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalent Bonding Low-Cost2 DOE HQSiteo n n eDPF 2004200 Area Keith Klein,8,
Tracer Testing At Dixie Valley Geothermal Area (Reed, 2007) | Open Energy
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-EnhancingEt Al., 2013)OpenEnergy FacilitiesInformationTown700 Jump(Klein,
Tracer Testing At Fenton Hill HDR Geothermal Area (Callahan, 1996) | Open
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-EnhancingEt Al., 2013)OpenEnergy FacilitiesInformationTown700 Jump(Klein,Energy
Tracer Testing at Dixie Valley, Nevada, Using Pyrene Tetrasulfonate Amino
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-EnhancingEt Al., 2013)OpenEnergy FacilitiesInformationTown700 Jump(Klein,EnergyG,
A numerical model for the gamma-ray emission of the microquasar LS 5039
V. Bosch-Ramon; J. M. Paredes
2004-07-01
The possible association between the microquasar LS 5039 and the EGRET source 3EG J1824-1514 suggests that microquasars could also be sources of high energy gamma-rays. In this paper, we explore, with a detailed numerical model, if this system can produce the emission detected by EGRET (>100 MeV) through inverse Compton (IC) scattering. Our numerical approach considers a population of relativistic electrons entrained in a cylindrical inhomogeneous jet, interacting with both the radiation and the magnetic fields, taking into account the Thomson and Klein-Nishina regimes of interaction. The computed spectrum reproduces the observed spectral characteristics at very high energy.
Emergent gravity/Non-linear U(1) gauge theory correspondence
Supriya Kar; K. Priyabrat Pandey; Abhishek K. Singh; Sunita Singh
2010-02-21
Kaluza-Klein gravity is revisted, with renewed interest, in a type IIB string theory on $S^1\\times K3$. The irreducible curvature tensors are worked out in the, T-dual, emergent gravity in 4D to yield a non-linear U(1) gauge theory. Interestingly, the T-duality may be seen to describe an open/closed string duality at a self-dual string coupling. The obtained deformation in $AdS_5$ black hole is analyzed to introduce the notion of temperature in the emergent gravity underlying the recent idea of entropic force.
Post measurement bipartite entanglement entropy in conformal field theories
M. A. Rajabpour
2015-08-06
We derive exact formulas for bipartite von Neumann entanglement entropy after partial projective local measurement in $1+1$ dimensional conformal field theories with periodic and open boundary conditions. After defining the set up we will check numerically the validity of our results in the case of Klein-Gordon field theory (coupled harmonic oscillators) and spin-$1/2$ XX chain in a magnetic field. The agreement between analytical results and the numerical calculations is very good. We also find a lower bound for localizable entanglement in coupled harmonic oscillators.
Towards Non-Commutative Deformations of Relativistic Wave Equations in 2+1 Dimensions
Bernd J. Schroers; Matthias Wilhelm
2014-05-20
We consider the deformation of the Poincar\\'e group in 2+1 dimensions into the quantum double of the Lorentz group and construct Lorentz-covariant momentum-space formulations of the irreducible representations describing massive particles with spin 0, 1/2 and 1 in the deformed theory. We discuss ways of obtaining non-commutative versions of relativistic wave equations like the Klein-Gordon, Dirac and Proca equations in 2+1 dimensions by applying a suitably defined Fourier transform, and point out the relation between non-commutative Dirac equations and the exponentiated Dirac operator considered by Atiyah and Moore.
Suppressing Proton Decay in Theories with Localised Fermions
Bobby S. Acharya; Roberto Valandro
2006-08-01
We calculate the contribution to the proton decay amplitude from Kaluza-Klein lepto-quarks in theories with extra dimensions, localised fermions and gauge fields which propagate in the bulk. Such models naturally occur within the context of M-theory. In SU(5) models we show that carefully including all such modes gives a distinctive pattern of decays through various channels including a strong suppression of decays into neutrinos or right handed positrons. By contrast there is no such suppression for SO(10).
Radion clouds around evaporating black holes
J. R. Morris
2009-09-03
A Kaluza-Klein model, with a matter source associated with Hawking radiation from an evaporating black hole, is used to obtain a simple form for the radion effective potential. The environmental effect generally causes a matter-induced shift of the radion vacuum, resulting in the formation of a radion cloud around the hole. There is an albedo due to the radion cloud, with an energy dependent reflection coefficient that depends upon the size of the extra dimensions and the temperature of the hole.
Relativistic Wave Equations: An Operational Approach
G. Dattoli; E. Sabia; K. Górska; A. Horzela; K. A. Penson
2015-02-02
The use of operator methods of algebraic nature is shown to be a very powerful tool to deal with different forms of relativistic wave equations. The methods provide either exact or approximate solutions for various forms of differential equations, such as relativistic Schr\\"odinger, Klein-Gordon and Dirac. We discuss the free particle hypotheses and those relevant to particles subject to non-trivial potentials. In the latter case we will show how the proposed method leads to easily implementable numerical algorithms.
Extreme Science (LBNL Science at the Theater)
Ajo-Franklin, Caroline; Klein, Spencer; Minor, Andrew; Torok, Tamas
2012-02-27
On Feb. 27, 2012 at the Berkeley Repertory Theatre, four Berkeley Lab scientists presented talks related to extreme science - and what it means to you. Topics include: Neutrino hunting in Antarctica. Learn why Spencer Klein goes to the ends of the Earth to search for these ghostly particles. From Chernobyl to Central Asia, Tamas Torok travels the globe to study microbial diversity in extreme environments. Andrew Minor uses the world's most advanced electron microscopes to explore materials at ultrahigh stresses and in harsh environments. And microbes that talk to computers? Caroline Ajo-Franklin is pioneering cellular-electrical connections that could help transform sunlight into fuel.
Carrera, Edgar Fernando; /Florida State U.
2008-12-01
This dissertation presents a search for large extra dimensions in the single photon plus missing transverse energy final states. We use a data sample of approximately 2.7 fb{sup -1} of p{bar p} collisions at {radical}s = 1.96 TeV (recorded with the D{sup -} detector) to investigate direct Kaluza Klein graviton production and set limits, at the 95% C.L., on the fundamental mass scale M{sub D} from 970 GeV to 816 GeV for two to eight extra dimensions.
Search for universal extra dimensions in ppbar collisions
Abazov, Victor Mukhamedovich; Abbott, Braden Keim; Acharya, Bannanje Sripath; Adams, Mark Raymond; Adams, Todd; Alexeev, Guennadi D.; Alkhazov, Georgiy D.; Alton, Andrew K.; Alverson, George O.; Aoki, Masato; Askew, Andrew Warren; /Florida State U. /Stockholm U.
2011-12-01
We present a search for Kaluza-Klein (KK) particles predicted by models with universal extra dimensions (UED) using a data set corresponding to an integrated luminosity of 7.3 fb{sup -1}, collected by the D0 detector at a p{bar p} center of mass energy of 1.96 TeV. The decay chain of KK particles can lead to a final state with two muons of the same charge. This signature is used to set a lower limit on the compactification scale of R{sup -1} > 260 GeV in a minimal UED model.
Quasi-Normal Mode Expansion for Linearized Waves in Gravitational Systems
E. S. C. Ching; P. T. Leung; W. M. Suen; K. Young
1994-08-31
The quasinormal modes (QNM's) of gravitational systems modeled by the Klein-Gordon equation with effective potentials are studied in analogy to the QNM's of optical cavities. Conditions are given for the QNM's to form a complete set, i.e., for the Green's function to be expressible as a sum over QNM's, answering a conjecture by Price and Husain [Phys. Rev. Lett. {\\bf 68}, 1973 (1992)]. In the cases where the QNM sum is divergent, procedures for regularization are given. The crucial condition for completeness is the existence of spatial discontinuities in the system, e.g., the discontinuity at the stellar surface in the model of Price and Husain.
Distribution and Process of Environmental Inequity in the Brazos Valley, Texas
Hanchett, Chelsea
2007-09-17
The Resource Conservation and Recovery Act (RCRA) was created in 1976 and amended in 1984 and 1986. Its purpose is to monitor active TSDFs from the creation of the waste until disposal. The EPA’s Office of Solid Waste administers this policy through issuing... ACKNOWLEDGMENTS I would like to thank my advisor, Dr. Wendy E. Jepson, for her invaluable assistance with this project. It would not have materialized without her patient guidance. Also providing technical assistance to this project are Dr. Andrew G. Klein...
Modeling water waves beyond perturbations
Clamond, Didier
2015-01-01
In this chapter, we illustrate the advantage of variational principles for modeling water waves from an elementary practical viewpoint. The method is based on a `relaxed' variational principle, i.e., on a Lagrangian involving as many variables as possible, and imposing some suitable subordinate constraints. This approach allows the construction of approximations without necessarily relying on a small parameter. This is illustrated via simple examples, namely the Serre equations in shallow water, a generalization of the Klein-Gordon equation in deep water and how to unify these equations in arbitrary depth. The chapter ends with a discussion and caution on how this approach should be used in practice.
Successes in School Energy Management - Energy Monitoring
Corbitt, C.
2012-01-01
stream_source_info ESL-KT-12-10-27.pdf.txt stream_content_type text/plain stream_size 2031 Content-Encoding ISO-8859-1 stream_name ESL-KT-12-10-27.pdf.txt Content-Type text/plain; charset=ISO-8859-1 Successes in School... Energy Management ? Energy Monitoring Chad Corbitt, CEM, ATEM Energy Manager, Klein ISD jcorbitt1@kleinisd.net Wednesday, October 10, 2012 Keys to Energy Monitoring ? Develop an Energy Monitoring plan ? Define the why, what, how and who...
Hybrid Model for Building Performance Diagnosis and Optimal Control
Wang, S.; Xu, X.
2003-01-01
S. (1983). Raising the open U value by passive means. Proc. 8th Nat. Passive Solar Conf. Glorieta, NM, pp.839-842. Bahai H. and Esat I.I. (1994). A hybrid model for analysis of complex stress distribution in threaded connectors. Computers... Research Centre of Finland. Kalogirou SA, Neocleous CC and Schizas CN. (1997). Heating load estimation using artificial neural networks. In: Proc. CLIMA 2000 Conf., Brussels (Belgium). Klein S.A., Beckman W.A. et al. (1994). TRNSYS-A Transient System...
Supersymmetry Algebra in Super Yang-Mills Theories
Shuichi Yokoyama
2015-09-18
We compute supersymmetry algebra (superalgebra) in supersymmetric Yang-Mills theories (SYM) consisting of a vector multiplet including fermionic contribution in six dimensions. We show that the contribution of fermion is given by boundary terms. From six dimensional results we determine superalgebras of five and four dimensional SYM by dimensional reduction. In five dimensional superalgebra the Kaluza-Klein momentum and the instanton particle charge are not the same but algebraically indistinguishable. We also extend this calculation including a hyper multiplet and for maximally SYM. We derive extended supersymmetry algebras in these four dimensional SYM with the holomorphic coupling constant given in hep-th/9408099.
On the Classical Solutions of Two Dimensional Inviscid Rotating Shallow Water System
Bin Cheng; Chunjing Xie
2009-07-01
We prove global existence and asymptotic behavior of classical solutions for two dimensional inviscid Rotating Shallow Water system with small initial data subject to the zero-relative-vorticity constraint. One of the key steps is a reformulation of the problem into a symmetric quasilinear Klein-Gordon system, for which the global existence of classical solutions is then proved with combination of the vector field approach and the normal forms. We also probe the case of general initial data and reveal a lower bound for the lifespan that is almost inversely proportional to the size of the initial relative vorticity.
Egar, Joseph Michael
1959-01-01
systems installed in commercial buildings. A large prototypical office building (124,000 ft2) was used in simulation modeling. The DOE-2.1e program was used for whole building simulation, F-Chart (Beckman et al., 1977) for solar thermal systems... analysis, and PV F-Chart (Klein and Beckman, 1983) for solar PV systems analysis. INTRODUCTION This study is an extension of previous research. The preceding studies were (1) development of a detailed calibrated simulation model for a large office...
The quantum theory of scalar fields on the de Sitter expanding universe
Ion I. Cotaescu; Cosmin Crucean; Adrian Pop
2008-02-14
New quantum modes of the free scalar field are derived in a special time-evolution picture that may be introduced in moving charts of de Sitter backgrounds. The wave functions of these new modes are solutions of the Klein-Gordon equation and energy eigenfunctions, defining the energy basis. This completes the scalar quantum mechanics where the momentum basis is well-known from long time. In this enlarged framework the quantization of the scalar field can be done in canonical way obtaining the principal conserved one-particle operators and the Green functions.
Dirac solutions for quaternionic potentials
De Leo, Stefano Giardino, Sergio
2014-02-15
The Dirac equation is solved for quaternionic potentials, i?V{sub 0} + j?W{sub 0} (V{sub 0}?R , W{sub 0}?C). The study shows two different solutions. The first one contains particle and anti-particle solutions and leads to the diffusion, tunneling, and Klein energy zones. The standard solution is recovered taking the complex limit of this solution. The second solution, which does not have a complex counterpart, can be seen as a V{sub 0}-antiparticle or |W{sub 0}|-particle solution.
High Spins Beyond Rarita-Schwinger Framework
Mariana Kirchbach; Mauro Napsuciale
2005-05-27
We study the eigenvalue problem of the squared Pauli-Lubanski vector, W^{2}, in the Spinor-Vector representation space and derive from it that the -s(s+1)m^{2} subspace with s=3/2, i.e. spin 3/2 in the rest frame, is pinned down by the one sole Klein-Gordon like equation, [ (p^{2}-m^{2})g_{\\alpha\\beta}-{2/3}p_{\\beta}p_{\\alpha}- {1/3}(p_{\\alpha}\\gamma_{\\beta}+p_{\\beta}\\gamma_{\\alpha})\
Fine Mapping and Characterization of the iap Gene in Sorghum [Sorghum bicolor (L.) Moench]
Gill, John
2014-05-27
1. Mean pollen adhesion across humidity levels and females. Error bars indicate the standard error of the calculated mean. 0.0 20.0 40.0 60.0 80.0 100.0 120.0 45% 65% 85% 65% x 85% 85% x 65% M ea n n u m b er o f p o ll en g ra... with permission from “Effect of humidity on intergeneric pollinations of iap (Inhibition of Alien Pollen) sorghum [Sorghum bicolor (L.) Moench]” by John R. Gill, William L. Rooney, Patricia E. Klein, 2014. Euphytica, DOI 10.1007/s10681-014-1113-5. Copyright...
Hidden Photons in Extra Dimensions
Chris J. Wallace; Joerg Jaeckel; Sabyasachi Roy
2013-11-25
Additional U(1) gauge symmetries and corresponding vector bosons, called hidden photons, interacting with the regular photon via kinetic mixing are well motivated in extensions of the Standard Model. Such extensions often exhibit extra spatial dimensions. In this note we investigate the effects of hidden photons living in extra dimensions. In four dimensions such a hidden photon is only detectable if it has a mass or if there exists additional matter charged under it. We note that in extra dimensions suitable masses for hidden photons are automatically present in form of the Kaluza-Klein tower.
Plant maintenance and plant life extension issue, 2007
Agnihotri, Newal (ed.)
2007-03-15
The focus of the March-April issue is on plant maintenance and plant life extension. Major articles/reports in this issue include: Three proposed COLs expected in 2007, by Dale E. Klein, U.S. Nuclear Regulatory Commission; Delivering behaviors that our customers value, by Jack Allen, Westinghouse Electric Company; Facilitating high-level and fuel waste disposal technologies, by Malcolm Gray, IAEA, Austria; Plant life management and long-term operation, by Pal Kovacs, OECD-NEA, France; Measuring control rod position, by R. Taymanov, K. Sapozhnikova, I. Druzhinin, D.I. Mendeleyev, Institue for Metrology, Russia; and, 'Modernization' means higher safety, by Svetlana Genova, Kozluduy NPP plc, Bulgaria.
Arne Goedeke; Alan D. Rendall
2010-02-21
It is known that all spatially homogeneous solutions of the vacuum Einstein equations in four dimensions which exist for an infinite proper time towards the future are future geodesically complete. This paper investigates whether the analogous statement holds in higher dimensions. A positive answer to this question is obtained for a large class of models which can be studied with the help of Kaluza-Klein reduction to solutions of the Einstein-scalar field equations in four dimensions. The proof of this result makes use of a criterion for geodesic completeness which is applicable to more general spatially homogeneous models.
Emergent observable deSitter space from an Equation of Motion
Liu, Leihua
2015-01-01
We propose that de-Sitter space-time originates from Gaussian distribution in a quantum harmonic oscillator system. This equation associates with a massless Klein-Gordon equation. We discover that every excited states of quantum oscillator also contributes for the de-Sitter space-time. The observable part of metric is related to energy scale and excited quantum number $n$. As for off-diagonal elements, it comes from the superposition of quantum mechanics. These elements can cause in-homogeneous at the very beginning of universe.
Persistent energy flow for a stochastic wave equation model in nonequilibrium statistical mechanics
Lawrence E. Thomas
2012-04-29
We consider a one-dimensional partial differential equation system modeling heat flow around a ring. The system includes a Klein-Gordon wave equation for a field satisfying spatial periodic boundary conditions, as well as Ornstein-Uhlenbeck stochastic differential equations with finite rank dissipation and stochastic driving terms modeling heat baths. There is an energy flow around the ring. In the case of a linear field with different (fixed) bath temperatures, the energy flow can persist even when the interaction with the baths is turned off. A simple example is given.
Renyi entropy of the critical O(N) model
Anirbit Mukherjee
2015-12-03
In this article we explore a certain definition of "alternate quantization" for the critical O(N) model. We elaborate on a prescription to evaluate the Renyi entropy of alternately quantized critical O(N) model. We show that there exists new saddles of the q-Renyi free energy functional corresponding to putting certain combinations of the Kaluza-Klein modes into alternate quantization. This leads us to an analysis of trying to determine the true state of the theory by trying to ascertain the global minima among these saddle points.
Buffer-gas-induced absorption resonances in Rb vapor RID B-9041-2008
Mikhailov, E. E.; Novikova, I.; Rostovtsev, Y. V.; Welch, George R.
2004-01-01
of the resonance in this case is inversely proportional to the atomic density [57]: g?DsNd . uVdu2?ggrS 38pNl2LD?1/2. s25d Substituting the density of the resonant atoms given by Eq. (23) we obtain the resonance width: g?DsDd ~ uVdu2?ggr 1 ?NLe D2/2skud2.... Scully for useful and stimulating discus- sions, and M. Klein for careful reading of the manuscript. Financial support is provided by the Office of Naval Re- search. [1] E. Arimondo and G. Orriols, Lett. Nuovo Cimento Soc. Ital. Fis. 17, 333 (1976...
Greybody factors for Myers–Perry black holes
Boonserm, Petarpa; Chatrabhuti, Auttakit Ngampitipan, Tritos; Visser, Matt
2014-11-15
The Myers–Perry black holes are higher-dimensional generalizations of the usual (3+1)-dimensional rotating Kerr black hole. They are of considerable interest in Kaluza–Klein models, specifically within the context of brane-world versions thereof. In the present article, we shall consider the greybody factors associated with scalar field excitations of the Myers–Perry spacetimes, and develop some rigorous bounds on these greybody factors. These bounds are of relevance for characterizing both the higher-dimensional Hawking radiation, and the super-radiance, that is expected for these spacetimes.
Supersymmetry Algebra in Super Yang-Mills Theories
Yokoyama, Shuichi
2015-01-01
We compute supersymmetry algebra (superalgebra) in supersymmetric Yang-Mills theories (SYM) consisting of a vector multiplet including fermionic contribution in six dimensions. We show that the contribution of fermion is given by boundary terms. From six dimensional results we determine superalgebras of five and four dimensional SYM by dimensional reduction. In five dimensional superalgebra the Kaluza-Klein momentum and the instanton particle charge are not the same but algebraically indistinguishable. We also extend this calculation including a hyper multiplet and for maximally SYM. We derive extended supersymmetry algebras in those four dimensional SYM with the holomorphic coupling constant given in hep-th/9408099.
General self-tuning solutions and no-go theorem
Förste, Stefan [Bethe Center for Theoretical Physics and Physikalisches Institut der Universität Bonn, Nussallee 12, 53115 Bonn (Germany); Kim, Jihn E. [Department of Physics, Kyung Hee University, Seoul 130-701 (Korea, Republic of); Lee, Hyun Min, E-mail: forste@th.physik.uni-bonn.de, E-mail: jihnekim@gmail.com, E-mail: hyun.min.lee@kias.re.kr [School of Physics, KIAS, Seoul 130-722 (Korea, Republic of)
2013-03-01
We consider brane world models with one extra dimension. In the bulk there is in addition to gravity a three form gauge potential or equivalently a scalar (by generalisation of electric magnetic duality). We find classical solutions for which the 4d effective cosmological constant is adjusted by choice of integration constants. No go theorems for such self-tuning mechanism are circumvented by unorthodox Lagrangians for the three form respectively the scalar. It is argued that the corresponding effective 4d theory always includes tachyonic Kaluza-Klein excitations or ghosts. Known no go theorems are extended to a general class of models with unorthodox Lagrangians.
Greybody factors for Myers-Perry black holes
Boonserm, Petarpa; Ngampitipan, Tritos; Visser, Matt
2014-01-01
The Myers-Perry black holes are higher-dimensional generalizations of the usual (3+1)-dimensional rotating Kerr black hole. They are of considerable interest in Kaluza-Klein models, specifically within the context of brane-world versions thereof. In the present article we shall consider the greybody factors associated with scalar field excitations of the Myers-Perry spacetimes, and develop some rigorous bounds on these greybody factors. These bounds are of relevance for characterizing both the higher-dimensional Hawking radiation, and the super-radiance, that is expected for these spacetimes.
Localization on the Landscape and Eternal Inflation
Laura Mersini-Houghton; Malcolm J. Perry
2014-04-22
We investigate the validity of the assertion that eternal inflation populates the landscape of string theory. We verify that bubble solutions do not satisfy the Klein Gordon equation for the landscape potential. Solutions to the landscape potential within the formalism of quantum cosmology are Anderson localized wavefunctions. Those are inconsistent with inflating bubble solutions. The physical reasons behind the failure of a relation between eternal inflation and the landscape are rooted in quantum phenomena such as interference between wavefunction concentrated around the various vacua in the landscape.
Fully QED/relativistic theory of light pressure on free electrons by isotropic radiation
A. E. Kaplan
2015-07-27
A relativistic/QED theory of light pressure on electrons by an isotropic, in particular blackbody radiation predicts thermalization rates of free electrons over entire span of energies available in the lab and the nature. The calculations based on the QED Klein-Nishina theory of electron-photon scattering and relativistic Fokker-Planck equation, show that the transition from classical (Thompson) to QED (Compton) thermalization determined by the product of electron energy and radiation temperature, is reachable under conditions for controlled nuclear fusion, and predicts large acceleration of electron thermalization in the Compton domain and strong damping of plasma oscillations at the temperatures near plasma nuclear fusion.
Quantum mechanics of the closed collapsing Universe
K. A. Viarenich; V. L. Kalashnikov; S. L. Cherkas
2007-12-31
Two approaches to quantization of Freedman's closed Universe are compared. In the first approach, the Shrodinger's norm of the wave function of Universe is used, and in the second approach, the Klein-Gordon's norm is used. The second one allows building the quasi-Heisenberg operators as functions of time and finding their average values. It is shown that the average value of the Universe scale factor oscillates with damping and approaches to some constant value at the end of the Universe evolution.
An origin of the universe: a model alternative to Big Bang
Andrzej Mercik; Szymon Mercik
2006-04-04
We propose a new approach to the model of an origin of the universe built by Oscar Klein and Hannes Alfv\\'{e}n. Some modifications of assumptions underlying the model result in a possible scenario of the universe creation consistent with observations. We explain the large scale structre of the universe and we estimate the Hubble constant value as well as the number of galaxies in the universe. The model does not require many assumptions made in the model based on the Big Bang idea.
Direct-Current Resistivity Survey At Kilauea East Rift Geothermal Area
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Direct-Current Resistivity Survey At Kilauea East Rift Geothermal Area
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Direct-Current Resistivity Survey At Lightning Dock Area (Cunniff & Bowers,
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Direct-Current Resistivity Survey At Long Valley Caldera Geothermal Area
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Signature of William H. Goldstein Signature of William H. Goldstein
National Nuclear Security Administration (NNSA)
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National Nuclear Security Administration (NNSA)
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National Nuclear Security Administration (NNSA)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal GasAdministration Medal01 Sandia4) August 20123/%2A en Signature ofSeb KleinProposed
Leading the Nation in Clean Energy Deployment | Department of Energy
Broader source: Energy.gov (indexed) [DOE]
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i nAand DOE Safety StandardsLabor Relations<i>ADepartment ofo u tKlein,key
Fermionic and Bosonic Stabilizing Effects for Type I and Type II Dimension Bubbles
J. R. Morris
2004-05-21
We consider two types of "dimension bubbles", which are viewed as 4d nontopological solitons that emerge from a 5d theory with a compact extra dimension. The size of the extra dimension varies rapidly within the domain wall of the soliton. We consider the cases of type I (II) bubbles where the size of the extra dimension inside the bubble is much larger (smaller) than outside. Type I bubbles with thin domain walls can be stabilized by the entrapment of various particle modes whose masses become much smaller inside than outside the bubble. This is demonstrated here for the cases of scalar bosons, fermions, and massive vector bosons, including both Kaluza-Klein zero modes and Kaluza-Klein excitation modes. Type II bubbles expel massive particle modes but both types can be stabilized by photons. Plasma filled bubbles containing a variety of massless or nearly massless radiation modes may exist as long-lived metastable states. Furthermore, in contrast to the case with a "gravitational bag", the metric for a fluid-filled dimension bubble does not exhibit a naked singularity at the bubble's center.
The generalized Erlangen program and setting a geometry for four- dimensional conformal fields
Ne`eman, Y. [Tel Aviv Univ. (Israel). Sackler Faculty of Exact Sciences]|[Texas Univ., Austin, TX (United States). Center for Particle Physics; Hehl, F.W.; Mielke, E.W. [Koeln Univ. (Germany). Inst. fuer Theoretische Physik
1993-10-22
This is the text of a talk at the International Symposium on ``Mathematical Physics towards the XXI Century`` held in March 1993 at Beersheva, Israel. In the first part we attempt to summarize XXth Century Physics, in the light of Kelvin`s 1900 speech ``Dark Clouds over XIXth Century Physics.`` Contrary to what is usually said, Kelvin predicted that the ``clouds`` (relativity and quantum mechanics) would revolutionize physics and that one hundred years might be needed to harmonize them with classical physics. Quantum Gravity can be considered as a leftover from Kelvin`s program -- so are the problems with the interpretation of quantum mechanics. At the end of the XXth Century, the Standard Model is the new panoramic synthesis, drawn in gauge-geometric lines -- realizing the Erlangen program beyond F. Klein`s expectations. The hierarchy problem and the smallness of the cosmological constant are our ``clouds``, generations and the Higgs sector are to us what radioactivity was in 1900. In the second part we describe Metric-Affine spacetimes. We construct the Noether machinery and provide expressions for the conserved energy and hypermomentum. Superimposing conformal invariance over the affine structure induces the Virasoro-like infinite constraining algebra of diffeomorphisms, applied with constant parameters and opening the possibility of a 4DCFT, similar to 2DCFT.
Higgs Production and Decay in Models of a Warped Extra Dimension with a Bulk Higgs
Paul R. Archer; Marcela Carena; Adrian Carmona; Matthias Neubert
2015-01-15
Warped extra-dimension models in which the Higgs boson is allowed to propagate in the bulk of a compact AdS$_5$ space are conjectured to be dual to models featuring a partially composite Higgs boson. They offer a framework with which to investigate the implications of changing the scaling dimension of the Higgs operator, which can be used to reduce the constraints from electroweak precision data. In the context of such models, we calculate the cross section for Higgs production in gluon fusion and the $H\\to\\gamma\\gamma$ decay rate and show that they are finite (at one-loop order) as a consequence of gauge invariance. The extended scalar sector comprising the Kaluza-Klein excitations of the Standard Model scalars is constructed in detail. The largest effects are due to virtual KK fermions, whose contributions to the cross section and decay rate introduce a quadratic sensitivity to the maximum allowed value $y_\\ast$ of the random complex entries of the 5D anarchic Yukawa matrices. We find an enhancement of the gluon-fusion cross section and a reduction of the $H\\to\\gamma\\gamma$ rate as well as of the tree-level Higgs couplings to fermions and electroweak gauge bosons. We perform a detailed study of the correlated signal strengths for different production mechanisms and decay channels as functions of $y_\\ast$, the mass scale of Kaluza-Klein resonances and the scaling dimension of the composite Higgs operator.
Dirac equation in low dimensions: The factorization method
Sánchez-Monroy, J.A.; Quimbay, C.J.
2014-11-15
We present a general approach to solve the (1+1) and (2+1)-dimensional Dirac equations in the presence of static scalar, pseudoscalar and gauge potentials, for the case in which the potentials have the same functional form and thus the factorization method can be applied. We show that the presence of electric potentials in the Dirac equation leads to two Klein–Gordon equations including an energy-dependent potential. We then generalize the factorization method for the case of energy-dependent Hamiltonians. Additionally, the shape invariance is generalized for a specific class of energy-dependent Hamiltonians. We also present a condition for the absence of the Klein paradox (stability of the Dirac sea), showing how Dirac particles in low dimensions can be confined for a wide family of potentials. - Highlights: • The low-dimensional Dirac equation in the presence of static potentials is solved. • The factorization method is generalized for energy-dependent Hamiltonians. • The shape invariance is generalized for energy-dependent Hamiltonians. • The stability of the Dirac sea is related to the existence of supersymmetric partner Hamiltonians.
The perturbation equation of a static symmetrical homogeneous space-time
Jose L. Martinez-Morales
2009-09-26
In absence of explicit solutions of the perturbation equation of a static symmetrical homogeneous space-time, the best we can do is to construct a {\\it quasi-}transformation. In this framework, we solve the perturbation equation with initial data and a number of results are derived. Far from the horizon of a black hole of even space dimension $N$, a mass-less field decays as ${r^l} {{(-{r^2}+{t^2})}^{\\frac{1-N}{2}-l}}$ in space-time, where $l$ is a harmonic number of the sphere. A relation of energy and momentum of a particle with mass in a hyper black hole is discovered and a solution to the equation of Klein-Gordon in the metric of Schwarzschild-Tangherlini with initial data on the hypersphere is proposed. Also, the Green's function of the Klein-Gordon equation in Schwarzschild coordinates is calculated. This function is a sum on the harmonic modes of the sphere. The first term is a double integration on the spectrum of energy and the momentum of the particle. Far from the horizon, the double integration is approximated by an integration on a line defined by the relation of energy and momentum of a free particle. From here, the potential of Yukawa is derived. Finally, the linear perturbation equations are derived and solved exactly.
Higgs production and decay in models of a warped extra dimension with a bulk Higgs
Archer, Paul R. [Johannes Gutenberg University, Mainz (Germany); Carena, Marcela [Fermi National Acceleraor Laboratory, Batavia, IL (United States); Univ. of Chicago, Chicago, IL (United States); Carmona, Adrian [ETH Zurich (Switzerland); Neubert, Matthias [Johannes Gutenberg University, Mainz (Germany); Cornell Univ., Ithaca, NY (United States)
2015-01-01
Warped extra-dimension models in which the Higgs boson is allowed to propagate in the bulk of a compact AdS? space are conjectured to be dual to models featuring a partially composite Higgs boson. They offer a framework with which to investigate the implications of changing the scaling dimension of the Higgs operator, which can be used to reduce the constraints from electroweak precision data. In the context of such models, we calculate the cross section for Higgs production in gluon fusion and the H ? ?? decay rate and show that they are finite (at one-loop order) as a consequence of gauge invariance. The extended scalar sector comprising the Kaluza-Klein excitations of the Standard Model scalars is constructed in detail. The largest effects are due to virtual KK fermions, whose contributions to the cross section and decay rate introduce a quadratic sensitivity to the maximum allowed value y_{*} of the random complex entries of the 5D anarchic Yukawa matrices. We find an enhancement of the gluon-fusion cross section and a reduction of the H ? ?? rate as well as of the tree-level Higgs couplings to fermions and electroweak gauge bosons. We perform a detailed study of the correlated signal strengths for different production mechanisms and decay channels as functions of y_{*}, the mass scale of Kaluza-Klein resonances and the scaling dimension of the composite Higgs operator.
QED for fields obeying a square root operator equation
Tobias Gleim
2008-02-25
Instead of using local field equations - like the Dirac equation for spin-1/2 and the Klein-Gordon equation for spin-0 particles - one could try to use non-local field equations in order to describe scattering processes. The latter equations can be obtained by means of the relativistic energy together with the correspondence principle, resulting in equations with a square root operator. By coupling them to an electromagnetic field and expanding the square root (and taking into account terms of quadratic order in the electromagnetic coupling constant e), it is possible to calculate scattering matrix elements within the framework of quantum electrodynamics, e.g. like those for Compton scattering or for the scattering of two identical particles. This will be done here for the scalar case. These results are then compared with the corresponding ones based on the Klein-Gordon equation. A proposal of how to transfer these reflections to the spin-1/2 case is also presented.
Fredrick Michael
2010-05-22
Recently we have discussed the generalized parametrized Klein-Gordon equation for curved spacetime. We have also discussed its derivation from several approaches, the direct Feynman parametrization, the state function entropy or equivalently the information theory approach, and the stochastic differential equation approach. We have even suggested a generalization of the statistics of the entropy to the generalized entropies and derived the particular nonextensive statistics parametrized Klein-Gordon equation, and discussed its nonlinear FPE replacement of the complicated Gibbs-Boltzmann statistics entropy derived analog with complicated nonlinear potential or drift and diffusion coefficients. In this article we apply these previously derived results to the quantum transport in abruptly coupled curved space-time heterostructures, applied here specifically to Black-Hole event horizon coupling to normal curved space-time. We derive the coupling self energy, and the Garcia-Molliner surface Green's functions from which we can calculate the surface area and entropy. We then derive the nonequilibrium transport equations for the radiation from the Black-Hole. We discuss the theory application to Worm Holes and quantum analogues.
B. J. Falaye; K. J. Oyewumi; S. M. Ikhdair; M. Hamzavi
2014-10-28
In this study, approximate analytical solution of Schr\\"odinger, Klein-Gordon and Dirac equations under the Tietz-Wei (TW) diatomic molecular potential are represented by using an approximation for the centrifugal term. We have applied three types of eigensolution techniques; the functional analysis approach (FAA), supersymmetry quantum mechanics (SUSYQM) and asymptotic iteration method (AIM) to solve Klein-Gordon Dirac and Schr\\"odinger equations, respectively. The energy eigenvalues and the corresponding eigenfunctions for these three wave equations are obtained and some numerical results and figures are reported. It has been shown that these techniques yielded exactly same results. some expectation values of the TW diatomic molecular potential within the framework of the Hellmann-Feynman theorem (HFT) have been presented. The probability distributions which characterize the quantum-mechanical states of TW diatomic molecular potential are analysed by means of complementary information measures of a probability distribution called the Fishers information entropy. This distribution has been described in terms of Jacobi polynomials, whose characteristics are controlled by the quantum numbers.
Higgs production and decay in models of a warped extra dimension with a bulk Higgs
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Archer, Paul R.; Carena, Marcela; Carmona, Adrian; Neubert, Matthias
2015-01-13
Warped extra-dimension models in which the Higgs boson is allowed to propagate in the bulk of a compact AdS? space are conjectured to be dual to models featuring a partially composite Higgs boson. They offer a framework with which to investigate the implications of changing the scaling dimension of the Higgs operator, which can be used to reduce the constraints from electroweak precision data. In the context of such models, we calculate the cross section for Higgs production in gluon fusion and the H ? ?? decay rate and show that they are finite (at one-loop order) as a consequencemore »of gauge invariance. The extended scalar sector comprising the Kaluza-Klein excitations of the Standard Model scalars is constructed in detail. The largest effects are due to virtual KK fermions, whose contributions to the cross section and decay rate introduce a quadratic sensitivity to the maximum allowed value y* of the random complex entries of the 5D anarchic Yukawa matrices. We find an enhancement of the gluon-fusion cross section and a reduction of the H ? ?? rate as well as of the tree-level Higgs couplings to fermions and electroweak gauge bosons. We perform a detailed study of the correlated signal strengths for different production mechanisms and decay channels as functions of y*, the mass scale of Kaluza-Klein resonances and the scaling dimension of the composite Higgs operator.« less
gamma-ray emission from microquasars: a numerical model for LSI+61 303
Valenti Bosch-Ramon; Josep M. Paredes
2004-07-01
We explore the possible association between the microquasar LSI+61 303 and the EGRET source 2CG 135+01/3EG J0241$+$6103 by studying, with a detailed numerical model, whether this system can produce the emission and the variability detected by EGRET ($>$100 MeV) through inverse Compton (IC) scattering. Our numerical approach considers a population of relativistic electrons entrained in a cylindrical inhomogeneous jet, interacting with both the radiation and the magnetic fields, taking into account the Thomson and Klein-Nishina regimes of interaction. Our results reproduce the observed spectral characteristics and variability at $\\gamma$-rays, thus strengthening the identification of LSI+61 303 as a high-energy $\\gamma$-ray source.
Coarse-grained distinguishability of field interactions
Bény, Cédric
2015-01-01
Information-theoretical quantities such as statistical distinguishability typically result from optimisations over all conceivable observables. Physical theories, however, are not generally considered valid for all mathematically allowed measurements. For instance, quantum field theories are not meant to be correct or even consistent at arbitrarily small lengthscales. A general way of limiting such an optimisation to certain observables is to first coarse-grain the states by a quantum channel. We show how to calculate contractive quantum information metrics on coarse-grained equilibrium states of free bosonic systems (Gaussian states), in directions generated by arbitrary perturbations of the Hamiltonian. As an example, we study the Klein-Gordon field. If the phase-space resolution is coarse compared to h-bar, the various metrics become equal and the calculations simplify. In that context, we compute the scale dependence of the distinguishability of the quartic interaction.
Coarse-grained distinguishability of field interactions
Cédric Bény
2015-09-10
Information-theoretical quantities such as statistical distinguishability typically result from optimisations over all conceivable observables. Physical theories, however, are not generally considered valid for all mathematically allowed measurements. For instance, quantum field theories are not meant to be correct or even consistent at arbitrarily small lengthscales. A general way of limiting such an optimisation to certain observables is to first coarse-grain the states by a quantum channel. We show how to calculate contractive quantum information metrics on coarse-grained equilibrium states of free bosonic systems (Gaussian states), in directions generated by arbitrary perturbations of the Hamiltonian. As an example, we study the Klein-Gordon field. If the phase-space resolution is coarse compared to h-bar, the various metrics become equal and the calculations simplify. In that context, we compute the scale dependence of the distinguishability of the quartic interaction.
Dark Energy: Observational Evidence and Theoretical Models
B. Novosyadlyj; V. Pelykh; Yu. Shtanov; A. Zhuk
2015-02-14
The book elucidates the current state of the dark energy problem and presents the results of the authors, who work in this area. It describes the observational evidence for the existence of dark energy, the methods and results of constraining of its parameters, modeling of dark energy by scalar fields, the space-times with extra spatial dimensions, especially Kaluza---Klein models, the braneworld models with a single extra dimension as well as the problems of positive definition of gravitational energy in General Relativity, energy conditions and consequences of their violation in the presence of dark energy. This monograph is intended for science professionals, educators and graduate students, specializing in general relativity, cosmology, field theory and particle physics.
Measuring 10-1000 GeV Cosmic Ray Electrons with GLAST/LAT
Alexander A. Moiseev; Jonathan F. Ormes; Igor V. Moskalenko
2007-06-06
We present here the capabilities of the GLAST Large Area Telescope to detect cosmic ray high-energy (HE) electrons in the energy range from 10 GeV to 1 TeV. We also discuss the science topics that can be investigated with HE electron data and quantify the results with LAT instrument simulations. The science topics include CR propagation, calibration of the IC gamma-ray model, testing hypotheses regarding the origin of HE energy cosmic-ray electrons, searching for any signature of Kaluza Klein Dark Matter annihilation, and measuring the HE electron anisotropy. We expect to detect ~ 107 electrons above 20 GeV per year of LAT operation.
Geometrical Interpretation of Electromagnetism in 5-Dimensional Manifold
Kim, TaeHun
2015-01-01
In this paper Kaluza-Klein theory is revisited and its implications are elaborated. We show that electromagnetic 4-potential is a deformation factor of a 5-dimensional (5D) manifold along the fifth (5th) axis. The charge-to-mass ratio has a physical meaning as the ratio of the movement along the direction of the 5th axis to the movement in the 4D space-time. Examinations on the interaction between particles registered by different observers suggest a covariance breaking of the 5th dimension. In order to have a 5D matter which is consistent with the construction of the 5D manifold, a notion of particle-thread is considered. Finally, the field equations which extend the Einstein field equations give the total energy-momentum tensor as a sum of that of matter, electromagnetic field, and the interaction between electric current and electromagnetic field.
Indirect signatures for axion(-like) particles
K. Zioutas; K. Dennerl; M. Grande; D. H. H. Hoffmann; J. Huovelin; B. Lakic; S. Orlando; A. Ortiz; Th. Papaevangelou; Y. Semertzidis; Sp. Tzamarias; O. Vilhu
2006-03-18
Magnetic field dependent transient solar observations are suggestive for axion-photon oscillations with light axion(-like) particle involvement. Novel dark-moon measurements with the SMART X-ray detectors can be conclusive for radiatively decaying massive exotica like the generic solar Kaluza-Klein axions. Furthermore, the predicted intrinsic strong solar magnetic fields could be the reason of enhanced low energy axion production. Such an axion component could be the as yet unknown origin of the strong quiet Sun X-ray luminosity at energies below 1 keV. Solar axion telescopes should lower their threshold, aiming to copy processes that might occur near the solar surface, be it due to spontaneous or magnetically induced radiative decay of axion(-like) particles. This is motivated also by the recent claim of an axion-like particle detection by the laser experiment PVLAS.
Hydrodynamics of the physical vacuum: dark matter is an illusion
Sbitnev, Valeriy I
2015-01-01
The relativistic hydrodynamical equations are being examined with the aim of extracting the quantum-mechanical equations (the relativistic Klein-Gordon equation and the Schr\\"odinger equation in the non-relativistic limit). In both cases it is required to get the quantum potential, which follows from pressure gradients within a superfluid vacuum medium. This special fluid, endowed with viscosity allows to describe emergence of the flat orbital speeds of spiral galaxies. The viscosity averaged on time vanishes, but its variance is different from zero. It is a function fluctuating about zero. Therefore the flattening is the result of the energy exchange of the torque with zero-point fluctuations of the physical vacuum on the ultra-low frequencies.
Biquaternions algebra and its applications by solving of some theoretical physics equations
L. A. Alexeyeva
2013-02-03
The functional space of biquaternions is considered on Minkovskiy space. The scalar-vector biquaternions representation is used which was offered by W. Hamilton for quaternions. With introduction of differential operator - a mutual complex gradient (bigradients), which generalize the notion of a gradient on biquaternions space, biquaternionic wave (biwave) equations are considered, their invariance for group of the Lorentz-Puancare transformations is shown and their generalized solutions are obtained. Biquaternionic form of generalized Maxwell-Dirac equation is constructed and its solutions are researched on base of the differential biquaternions algebra. Its generalized decisions are built with use of scalar potential. The new equation for these potential are constructed which unites known equations of quantum mechanics (Klein-Gordon and Schrodinger Eq.). The nonstationary, steady-state and harmonic on time scalar fields and generated by them the spinors and spinors fields in biquaternionic form are constructed.
J. Marciak-Kozlowska; M. Pelc; M. A. Kozlowski
2009-06-09
Fascinating developments in optical pulse engineering over the last 20 years lead to the generation of laser pulses as short as few femtosecond, providing a unique tool for high resolution time domain spectroscopy. However, a number of the processes in nature evolve with characteristic times of the order of 1 fs or even shorter. Time domain studies of such processes require at first place sub-fs resolution, offered by pulse depicting attosecond localization. The generation, characterization and proof of principle applications of such pulses is the target of the attoscience. In the paper the thermal processes on the attosecond scale are described. The Klein-Gordon and Proca equations are developed. The relativistic effects in the heat transport on nanoscale are discussed. It is shown that the standard Fourier equation can not be valid for the transport phenomena induced by attosecond laser pulses. The heat transport in nanoparticles and nanotubules is investigated.
Construction and physical properties of Kerr black holes with scalar hair
Carlos Herdeiro; Eugen Radu
2015-05-04
Kerr black holes with scalar hair are solutions of the Einstein-Klein-Gordon field equations describing regular (on and outside an event horizon), asymptotically flat black holes with scalar hair (arXiv:1403.2757). These black holes interpolate continuously between the Kerr solution and rotating boson stars in D=4 spacetime dimensions. Here we provide details on their construction, discussing properties of the ansatz, the field equations, the boundary conditions and the numerical strategy. Then, we present an overview of the parameter space of the solutions, and describe in detail the space-time structure of the black holes exterior geometry and of the scalar field for a sample of reference solutions. Phenomenological properties of potential astrophysical interest are also discussed, and the stability properties and possible generalizations are commented on. As supplementary material to this paper we make available numerical data files for the sample of reference solutions discussed, for public use.
New scenarios for classical and quantum mechanical systems with position dependent mass
J. R. Morris
2015-07-18
An inhomogeneous Kaluza-Klein compactification to four dimensions, followed by a conformal transformation, results in a system with position dependent mass (PDM). This origin of a PDM is quite different from the condensed matter one. A substantial generalization of a previously studied nonlinear oscillator with variable mass is obtained, wherein the position dependence of the mass of a nonrelativistic particle is due to a dilatonic coupling function emerging from the extra dimension. Previously obtained solutions for such systems can be extended and reinterpreted as nonrelativistic particles interacting with dilaton fields, which, themselves, can have interesting structures. An application is presented for the nonlinear oscillator, where within the new scenario the particle is coupled to a dilatonic string.
Jennifer M. Smillie; Bryan R. Webber
2007-02-21
An interesting alternative to supersymmetry (SUSY) for extending physics beyond the Standard Model is a model with universal extra dimensions (UED), in which the SUSY superpartners are replaced by Kaluza-Klein excitations of the Standard Model particles. If new particles are discovered at the LHC, even if their mass spectrum favours SUSY or UED, it will be vital to distinguish between their spin assignments in the two models as far as possible. We extend the method proposed by Barr [hep-ph/0405052] to the UED case and investigate the angular and charge asymmetries of decay distributions for sample mass spectra of both SUSY and UED types. For hierarchical (`SUSY-type') mass spectra there is a good chance of distinguishing the spin structures of the two models. However, a mass spectrum of the quasi-degenerate type expected in UED would make it difficult to observe spin correlations.
Quantum probes of timelike naked singularities in $2+1-$ dimensional power - law spacetimes
O. Gurtug; M. Halilsoy; S. Habib Mazharimousavi
2015-01-29
The formation of naked singularities in $2+1-$ dimensional power - law spacetimes in linear Einstein-Maxwell and Einstein-scalar theories sourced by azimuthally symmetric electric field and a self-interacting real scalar field respectively, are considered in view of quantum mechanics. Quantum test fields obeying the Klein-Gordon and Dirac equations are used to probe the classical timelike naked singularities developed at $r=0$. We show that when the classically singular spacetimes probed with scalar waves, the considered spacetimes remains singular. However, the spinorial wave probe of the singularity in the metric of a self-interacting real scalar field remains quantum regular. The notable outcome in this study is that the quantum regularity/singularity can not be associated with the energy conditions.
Mirror effect induced by the dilaton field on the Hawking radiation
Maeda, Kengo; Okamura, Takashi
2006-11-03
A ''stringy particle'' action is naturally derived from Kaluza-Klein compactification of a test string action coupled to the dilaton field in a conformally invariant manner. According to the standard procedure, we perform the second quantization of the stringy particle. As an interesting application, we consider evaporation of a near-extremal dilatonic black hole by Hawking radiation via the stringy particles. We show that a mirror surface which reflects them is induced by the dilaton field outside the the horizon when the size of the black hole is comparable to the Planck scale. As a result, the energy flux does not propagate across the surface, and hence the evaporation of the dilatonic black hole stops just before the naked singularity at the extremal state appears even though the surface gravity is non-zero in the extremal limit.
Quantum singularities in the BTZ spacetime
Pitelli, Joao Paulo M.; Letelier, Patricio S.
2008-06-15
The spinless Banados-Teiltelboim-Zanelli spacetime is considered in the quantum theory context. Specifically, we study the case of a negative mass parameter using quantum test particles obeying the Klein-Gordon and Dirac equations. We study if this classical singular spacetime, with a naked singularity at the origin, remains singular when tested with quantum particles. The need for additional information near the origin is confirmed for massive scalar particles and all of the possible boundary conditions necessary to turn the spatial portion of the wave operator self-adjoint are found. When tested by massless scalar particles or fermions, the singularity is ''healed'' and no extra boundary condition is needed. Near infinity, no boundary conditions are necessary.
Examples of naked singularity formation in higher-dimensional Einstein-vacuum spacetimes
An, Xinliang; Lü, H
2015-01-01
The vacuum Einstein equations in 5+1 dimensions are shown to admit solutions describing naked singularity formation in gravitational collapse from nonsingular asymptotically locally flat initial data. We present a class of specific examples with spherical extra dimensions. Thanks to the Kaluza-Klein dimensional reduction, these spacetimes are constructed by lifting continuously self-similar solutions of the 4-dimensional Einstein-scalar field system with a negative exponential potential. Their existence provides a new test-bed for weak cosmic censorship in higher-dimensional gravity. In addition, we point out why a similar attempt of embedding Christodoulou's well-known solutions for massless scalar fields fails to capture formation of naked singularities in 4+1 dimensions.
O. Gurtug; M. Halilsoy; S. Habib Mazharimousavi
2014-01-14
The formation of a naked singularity in $f(R)$ global monopole spacetime is considered in view of quantum mechanics. Quantum test fields obeying the Klein$-$Gordon, Dirac and Maxwell equations are used to probe the classical timelike naked singularity developed at $r=0$. We prove that the spatial derivative operator of the fields fails to be essentially self-adjoint. As a result, the classical timelike naked singularity formed in $f(R)$ global monopole spacetime remains quantum mechanically singular when it is probed with quantum fields having different spin structures. Pitelli and Letelier (Phys. Rev. D 80, 104035, 2009) had shown that for quantum scalar ($spin$ $0$% ) probes the general relativistic global monopole singularity remains intact. For specific modes electromagnetic ($spin$ $1$) and Dirac field ($% spin$ $1/2$) probes, however, we show that the global monopole spacetime behaves quantum mechanically regular. The admissibility of this singularity is also incorporated within the Gubser's singularity conjecture.
Geometrical Interpretation of Electromagnetism in 5-Dimensional Manifold
TaeHun Kim; Hyunbyuk Kim
2015-07-12
In this paper Kaluza-Klein theory is revisited and its implications are elaborated. We show that electromagnetic 4-potential is a deformation factor of a 5-dimensional (5D) manifold along the fifth (5th) axis. The charge-to-mass ratio has a physical meaning as the ratio of the movement along the direction of the 5th axis to the movement in the 4D space-time. Examinations on the interaction between particles registered by different observers suggest a covariance breaking of the 5th dimension. In order to have a 5D matter which is consistent with the construction of the 5D manifold, a notion of particle-thread is considered. Finally, the field equations which extend the Einstein field equations give the total energy-momentum tensor as a sum of that of matter, electromagnetic field, and the interaction between electric current and electromagnetic field.
New symmetry properties of pointlike scalar and Dirac particles
Alexander J. Silenko
2015-03-13
New symmetry properties are found for pointlike scalar and Dirac particles (Higgs boson and all leptons) in Riemannian and Riemann-Cartan spacetimes in the presence of electromagnetic interactions. A Hermitian form of the Klein-Gordon equation for a pointlike scalar particle in an arbitrary n-dimensional Riemannian (or Riemann-Cartan) spacetime is obtained. New conformal symmetries of initial and Hermitian forms of this equation are ascertained. In the above spacetime, general Hamiltonians in the generalized Feshbach-Villars and Foldy-Wouthuysen representations are derived. The conformal-like transformation conserving these Hamiltonians is found. Corresponding conformal symmetries of a Dirac particle are determined. It is proven that all conformal symmetries remain unchanged by an inclusion of electromagnetic interactions.
Superradiance and black hole bomb in five-dimensional minimal ungauged supergravity
Aliev, Alikram N.
2014-11-01
We examine the black hole bomb model which consists of a rotating black hole of five-dimenensional minimal ungauged supergravity and a reflecting mirror around it. For low-frequency scalar perturbations, we find solutions to the Klein-Gordon equation in the near-horizon and far regions of the black hole spacetime. To avoid solutions with logarithmic terms, we assume that the orbital quantum number l takes on nearly, but not exactly, integer values and perform the matching of these solutions in an intermediate region. This allows us to calculate analytically the frequency spectrum of quasinormal modes, taking the limits as l approaches even or odd integers separately. We find that all l modes of scalar perturbations undergo negative damping in the regime of superradiance, resulting in exponential growth of their amplitudes. Thus, the model under consideration would exhibit the superradiant instability, eventually behaving as a black hole bomb in five dimensions.
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Aad, G.
2015-02-10
This study reports on a search for narrow resonances in diboson production in the ??qq¯ final state using pp collision data corresponding to an integrated luminosity of 20 fb–1 collected at ?s=8 TeV with the ATLAS detector at the Large Hadron Collider. No significant excess of data events over the Standard Model expectation is observed. Upper limits at the 95 % confidence level are set on the production cross section times branching ratio for Kaluza–Klein gravitons predicted by the Randall–Sundrum model and for Extended Gauge Model W' bosons. These results lead to the exclusion of mass values below 740 andmore »1590 GeV for the graviton and W' boson respectively.« less
A. Jacholkowska; G. Lamanna; E. Nuss; J. Bolmont; C. Adloff; J. Alcaraz; R. Battiston; P. Brun; W. J. Burger; V. Choutko; G. Coignet; A. Falvard; E. Flandrini; L. Girard; C. Goy; K. Jedamzik; R. Kossakowski; G. Moultaka; S. Natale; J. Pochon; M. Pohl; S. Rosier-Lees; M. Sapinski; I. Sevilla Noarbe; JP. Vialle
2006-05-23
The detection of non-baryonic dark matter through its gamma-ray annihilation in the centre of our galaxy has been studied. The gamma fluxes according to different models have been simulated and compared to those expected to be observed with the Alpha Magnetic Spectrometer (AMS), during a long-term mission on board of the International Space Station. Under the assumption that the dark matter halo is composed of the lightest, stable supersymmetric particle, the neutralino, the results of the simulations in the framework of mSUGRA models, show that with a cuspy dark matter halo or a clumpy halo, the annihilation gamma-ray signal would be detected by AMS. More optimistic perspectives are obtained with the Anomaly Mediated Supersymmetry Breaking (AMSB) model. The latter leads also to a cosmologically important 6Li abundance. Finally, the discovery potential for the massive Kaluza-Klein dark matter candidates has been evaluated and their detection looks feasible.
Pierantozzi, T.; Vazquez, L.
2005-11-01
Through fractional calculus and following the method used by Dirac to obtain his well-known equation from the Klein-Gordon equation, we analyze a possible interpolation between the Dirac and the diffusion equations in one space dimension. We study the transition between the hyperbolic and parabolic behaviors by means of the generalization of the D'Alembert formula for the classical wave equation and the invariance under space and time inversions of the interpolating fractional evolution equations Dirac like. Such invariance depends on the values of the fractional index and is related to the nonlocal property of the time fractional differential operator. For this system of fractional evolution equations, we also find an associated conserved quantity analogous to the Hamiltonian for the classical Dirac case.
Scalar field as a Bose-Einstein condensate?
Castellanos, Elías; Escamilla-Rivera, Celia; Macías, Alfredo; Núñez, Darío E-mail: cescamilla@mctp.mx E-mail: nunez@nucleares.unam.mx
2014-11-01
We discuss the analogy between a classical scalar field with a self-interacting potential, in a curved spacetime described by a quasi-bounded state, and a trapped Bose-Einstein condensate. In this context, we compare the Klein-Gordon equation with the Gross-Pitaevskii equation. Moreover, the introduction of a curved background spacetime endows, in a natural way, an equivalence to the Gross-Pitaevskii equation with an explicit confinement potential. The curvature also induces a position dependent self-interaction parameter. We exploit this analogy by means of the Thomas-Fermi approximation, commonly used to describe the Bose-Einstein condensate, in order to analyze the quasi bound scalar field distribution surrounding a black hole.
Wave Propagation in Gravitational Systems: Completeness of Quasinormal Modes
E. S. C. Ching; P. T. Leung; W. M. Suen; K. Young
1995-07-14
The dynamics of relativistic stars and black holes are often studied in terms of the quasinormal modes (QNM's) of the Klein-Gordon (KG) equation with different effective potentials $V(x)$. In this paper we present a systematic study of the relation between the structure of the QNM's of the KG equation and the form of $V(x)$. In particular, we determine the requirements on $V(x)$ in order for the QNM's to form complete sets, and discuss in what sense they form complete sets. Among other implications, this study opens up the possibility of using QNM expansions to analyse the behavior of waves in relativistic systems, even for systems whose QNM's do {\\it not} form a complete set. For such systems, we show that a complete set of QNM's can often be obtained by introducing an infinitesimal change in the effective potential.
Hyperbolic extra-dimensions in particle physics and beyond
Alan S. Cornell
2015-07-16
The nature of space-time at high energy is an open question and the link between extra-dimensional theories with the physics of the Standard Model can not be established in a unique way. The compactification path is not unique and supersymmetry breaking can be done in different ways. Compactifications based on hyperbolic orbifolds gather a large number of properties that are useful for this problem, like a Dirac spectrum chiral zero modes, a mass gap with the Kaluza-Klein modes, discrete residual symmetries for the stability of dark matter, and interesting cosmological constructions. This shall be explored here for bulk scalar fields, with a roadmap provided for fermionic studies and beyond.
Time delay for dispersive systems in quantum scattering theory
Rafael Tiedra de Aldecoa
2008-10-06
We consider time delay and symmetrised time delay (defined in terms of sojourn times) for quantum scattering pairs $\\{H_0=h(P),H\\}$, where $h(P)$ a dispersive operator of hypoelliptic-type. For instance $h(P)$ can be one of the usual elliptic operators such as the Schr\\"odinger operator $h(P)=P^2$ or the square-root Klein-Gordon operator $h(P)=\\sqrt{1+P^2}$. We show under general conditions that the symmetrised time delay exists for all smooth even localization functions. It is equal to the Eisenbud-Wigner time delay plus a contribution due to the non-radial component of the localization function. If the scattering operator $S$ commutes with some function of the velocity operator $\
Rotating black holes in a draining bathtub: superradiant scattering of gravity waves
Mauricio Richartz; Angus Prain; Stefano Liberati; Silke Weinfurtner
2015-06-05
In a draining rotating fluid flow background, surface perturbations behave as a scalar field on a rotating effective black hole spacetime. We propose a new model for the background flow which takes into account the varying depth of the water. Numerical integration of the associated Klein-Gordon equation using accessible experimental parameters shows that gravity waves in an appropriate frequency range are amplified through the mechanism of superradiance. Our numerical results suggest that the observation of this phenomenon in a common fluid mechanical system is within experimental reach. Unlike the case of wave scattering around Kerr black holes, which depends only on one dimensionless background parameter (the ratio $a/M$ between the specific angular momentum and the mass of the black hole), our system depends on two dimensionless background parameters, namely the normalized angular velocity and surface gravity at the effective black hole horizon.
Adam R. Brown
2015-04-30
The non-perturbative instabilities of hot Kaluza-Klein spacetime are investigated. In addition to the known instability of hot space (the nucleation of 4D black holes) and the known instability of KK space (the nucleation of bubbles of nothing by quantum tunneling), we find two new instabilities: the nucleation of 5D black holes, and the nucleation of bubbles of nothing by thermal fluctuation. These four instabilities are controlled by two Euclidean instantons, with each instanton doing double duty via two inequivalent analytic continuations; thermodynamic instabilities of one are shown to be related to mechanical instabilities of the other. I also construct bubbles of nothing that are formed by a hybrid process involving both thermal fluctuation and quantum tunneling. There is an exact high-temperature/low-temperature duality that relates the nucleation of black holes to the nucleation of bubbles of nothing.
Science at the Theatre - Extreme Science - Promo Video
Klein, Spencer
2012-01-01
On Feb. 27 at 7 pm at the Berkeley Repertory Theatre, join four Berkeley Lab scientists as they discuss extreme science -- and what it means to you. Topics include: Neutrino hunting in Antarctica. Learn why Spencer Klein goes to the ends of the Earth to search for these ghostly particles. From Chernobyl to Central Asia, Tamas Torok travels the globe to study microbial diversity in extreme environments. Andrew Minor uses the world's most advanced electron microscopes to explore materials at ultrahigh stresses and in harsh environments. And microbes that talk to computers? Caroline Ajo-Franklin is pioneering cellular-electrical connections that could help transform sunlight into fuel. Go here for more information and to view videos of previous Science at the Theater events: http://www.lbl.gov/LBL-PID/fobl/
3D supergravity from wrapped M5-branes
Karndumri, Parinya
2015-01-01
Through consistent Kaluza-Klein reduction, we construct 3D N=2 gauged supergravities corresponding to twisted compactifications of M5-branes on a product of Riemann surfaces, including Kahler-Einstein four-manifolds. We extend the reduction to fermionic supersymmetry variations in order to determine the 3D Killing spinor equations and classify all (timelike) supersymmetric solutions. We show that the superpotential T dictates all supersymmetric solutions, not just AdS3 vacua. As a by-product, we identify an infinite class of new supersymmetric warped AdS3 (Godel) and warped dS3 critical points. Moreover, we show that T encodes the central charge and R symmetry of the dual N = (0,2) SCFTs in the large N limit. Upon uplift to 11D, we use this result to write the higher-dimensional geometries in canonical form and discuss the relation to existing classifications of supersymmetric AdS3 geometries.
Correction terms for propagators and d'Alembertians due to spacetime discreteness
Steven Johnston
2014-11-10
The causal set approach to quantum gravity models spacetime as a discrete structure - a causal set. Recent research has led to causal set models for the retarded propagator for the Klein-Gordon equation and the d'Alembertian operator. These models can be compared to their continuum counterparts via a sprinkling process. It has been shown that the models agree exactly with the continuum quantities in the limit of an infinite sprinkling density - the continuum limit. This paper obtains the correction terms for these models for sprinkled causal sets with a finite sprinkling density. These correction terms are an important step towards testable differences between the continuum and discrete models that could provide evidence of spacetime discreteness.
Hydrodynamics of the physical vacuum: dark matter is an illusion
Valeriy I. Sbitnev
2015-06-23
The relativistic hydrodynamical equations are being examined with the aim of extracting the quantum-mechanical equations (the relativistic Klein-Gordon equation and the Schr\\"odinger equation in the non-relativistic limit). In both cases it is required to get the quantum potential, which follows from pressure gradients within a superfluid vacuum medium. This special fluid, endowed with viscosity allows to describe emergence of the flat orbital speeds of spiral galaxies. The viscosity averaged on time vanishes, but its variance is different from zero. It is a function fluctuating about zero. Therefore the flattening is the result of the energy exchange of the torque with zero-point fluctuations of the physical vacuum on the ultra-low frequencies.
Homothety and Quasi Self Similarity in Asymptotically Flat and AdS Spacetimes
Wenli Zhao
2015-03-02
For a spherically symmetric self-gravitating scalar field we study self similar and quasi-self similar solutions in asymptotically flat and AdS spacetimes in various dimensions. Our main approach relies on reducing the Einstein-Klein-Gordon system of equations under the self similarity assumption to a dynamical system. Applying standard techniques in the analysis of dynamical system we study the corresponding phase diagrams, gaining some insight into the short and long-term evolution of the system. In the asymptotically flat case the fixed points of the dynamical system correspond to conformally flat spacetimes. We observed a new transition from a fixed point to a black hole and we compute the corresponding exponent analytically. In the case of AdS spacetime, we observed the quasi self similar scalar field scattering to infinity after interfering near the center corresponding to the dynamical system with no fixed points.
SNe Ia tests of quintessence tracker cosmology in an anisotropic background
Miranda, W. [Instituto Federal da Bahia, Paulo Afonso, Bahia (Brazil); Carneiro, S.; Pigozzo, C., E-mail: welber.miranda@ifba.edu.br, E-mail: saulo.carneiro@pq.cnpq.br, E-mail: cpigozzo@ufba.br [Instituto de Física, Universidade Federal da Bahia, Salvador, Bahia (Brazil)
2014-07-01
We investigate the observational effects of a quintessence model in an anisotropic spacetime. The anisotropic metric is a non-rotating particular case of a generalized Gödel's metric and is classified as Bianchi III. This metric is an exact solution of the Einstein-Klein-Gordon field equations with an anisotropic scalar field ?, which is responsible for the anisotropy of the spacetime geometry. We test the model against observations of type Ia supernovae, analyzing the SDSS dataset calibrated with the MLCS2k2 fitter, and the results are compared to standard quintessence models with Ratra-Peebles potentials. We obtain a good agreement with observations, with best values for the matter and curvature density parameters ?{sub M} = 0.29 and ?{sub k}= 0.01 respectively. We conclude that present SNe Ia observations cannot, alone, distinguish a possible anisotropic axis in the cosmos.
Double Barriers and Magnetic Field in Bilayer Graphene
Ilham Redouani; Ahmed Jellal; Hocine Bahlouli
2015-05-21
We study the transmission probability in an AB-stacked bilayer graphene of Dirac fermions scattered by a double barrier structure in the presence of a magnetic field. We take into account the full four bands of the energy spectrum and use the boundary conditions to determine the transmission probability. Our numerical results show that for energies higher than the interlayer coupling, four ways for transmission probabilities are possible while for energies less than the height of the barrier, Dirac fermions exhibits transmission resonances and only one transmission channel is available. We show that, for AB-stacked bilayer graphene, there is no Klein tunneling at normal incident. We find that the transmission displays sharp peaks inside the transmission gap around the Dirac point within the barrier regions while they are absent around the Dirac point in the well region. The effect of the magnetic field, interlayer electrostatic potential and various barrier geometry parameters on the transmission probabilities are also discussed.
Polarized Deep Inelastic Scattering Off the "Neutron" From Gauge/String Duality
Jian-Hua Gao; Zong-Gang Mou
2010-05-25
We investigate deep inelastic scattering off the polarized "neutron" using gauge/string duality. The "neutron" corresponds to a supergravity mode of the neutral dilatino. Through introducing the Pauli interaction term into the action in $\\textrm{AdS}_{5}$ space, we calculate the polarized deep inelastic structure functions of the "neutron" in supergravity approximation at large t' Hooft coupling $\\lambda$ and finite $x$ with $\\lambda^{-1/2}\\ll xneutron" are power suppressed at the same order as the ones of the "proton." Especially, we find the Burkhardt-Cottingham-like sum rule, which is satisfied in the work by Gao and Xiao, is broken due to the Pauli interaction term. We also illustrate how such a Pauli interaction term can arise naturally from higher dimensional fermion-graviton coupling through the usual Kaluza-Klein reduction.
Deformation of an asymmetric thin film
Jun Geng; Jonathan V. Selinger
2011-11-03
Experiments have investigated shape changes of polymer films induced by asymmetric swelling by a chemical vapor. Inspired by recent work on the shaping of elastic sheets by non-Euclidean metrics [Y. Klein, E. Efrati, and E. Sharon, Science 315, 1116 (2007)], we represent the effect of chemical vapors by a change in the target metric tensor. In this problem, unlike that earlier work, the target metric is asymmetric between the two sides of the film. Changing this metric induces a curvature of the film, which may be curvature into a partial cylinder or a partial sphere. We calculate the elastic energy for each of these shapes, and show that the sphere is favored for films smaller than a critical size, which depends on the film thickness, while the cylinder is favored for larger films.
Extremal Static AdS Black Hole/CFT Correspondence in Gauged Supergravities
H. Lu; Jianwei Mei; C. N. Pope; J. Vazquez-Poritz
2009-01-13
A recently proposed holographic duality allows the Bekenstein-Hawking entropy of extremal rotating black holes to be calculated microscopically, by applying the Cardy formula to the two-dimensional chiral CFTs associated with certain reparameterisations of azimuthal angular coordinates in the solutions. The central charges are proportional to the angular momenta of the black hole, and so the method degenerates in the case of static (non-rotating) black holes. We show that the method can be extended to encompass such charged static extremal AdS black holes by using consistent Kaluza-Klein sphere reduction ansatze to lift them to exact solutions in the low-energy limits of string theory or M-theory, where the electric charges become reinterpreted as angular momenta associated with internal rotations in the reduction sphere. We illustrate the procedure for the examples of extremal charged static AdS black holes in four, five, six and seven dimensions.
Gamma Ray Burst as Sources of Exotic Particles
Morgan, Ian; De Pree, Erin; Tennyson, Kevin
2015-01-01
We consider the possible production of stable lightest first level KK particle (LKP) in baryonic gamma ray bursts (GRB) out flows. We numerically computed the energy-dependent cross-sections of Kaluza-Klein (KK) excitations for the Standard Model gauge bosons, photon and Z. Next, we determined the feasibility of producing these KK excitations in gamma-ray emitting regions of GRBs. We found that a GRB fireball that accelerates baryons to energies greater than 10^14 eV could produce KK excitations out to approximately 10^12 cm from the central engine, indicating that GRBs may be a significant source of the LKP. Finally, we explore the potential observational consequences of our results.
Production Rate of Second KK Gauge Bosons in UED Models at LHC
Matsumoto, Shigeki; Senami, Masato; Yamanaka, Masato
2009-01-01
We calculate the production rates of the second Kaluza-Klein (KK) photon $\\gamma^{(2)}$ and Z boson $Z^{(2)}$ at the LHC including all significant processes in the minimal universal extra dimension (MUED) model. For discrimination of the MUED model from other TeV scale models in hadron collider experiments, $\\gamma^{(2)}$ and $Z^{(2)}$ play a crucial role. In order to discuss the discrimination and calculate their production rates, we derive effective Lagrangian containing KK number violating operators. We show that KK number violating processes are extremely important for the compactification scale larger than 800 GeV. We find that, with an integrated luminosity of 100 fb$^{-1}$, $\\gamma^{(2)}$ and $Z^{(2)}$ are produced 10$^6$ - 10$^2$ for the compactification scale between 400 GeV and 2000 GeV.
Complex statistics and diffusion in nonlinear disordered particle chains
Antonopoulos, Ch. G.; Bountis, T.; Skokos, Ch.; Drossos, L.
2014-06-15
We investigate dynamically and statistically diffusive motion in a Klein-Gordon particle chain in the presence of disorder. In particular, we examine a low energy (subdiffusive) and a higher energy (self-trapping) case and verify that subdiffusive spreading is always observed. We then carry out a statistical analysis of the motion, in both cases, in the sense of the Central Limit Theorem and present evidence of different chaos behaviors, for various groups of particles. Integrating the equations of motion for times as long as 10{sup 9}, our probability distribution functions always tend to Gaussians and show that the dynamics does not relax onto a quasi-periodic Kolmogorov-Arnold-Moser torus and that diffusion continues to spread chaotically for arbitrarily long times.
Self-force via energy-momentum and angular momentum balance equations
Yurij Yaremko
2012-07-20
The radiation reaction for a point-like charge coupled to a massive scalar field is considered. The retarded Green's function associated with the Klein-Gordon wave equation has support not only on the future light cone of the emission point (direct part), but extends inside the light cone as well (tail part). Dirac's scheme of decomposition of the retarded electromagnetic field into the "mean of the advanced and retarded field" and the "radiation" field is adapted to theories where Green's function consists of the direct and the tail parts. The Harish-Chandra equation of motion of radiating scalar charge under the influence of an external force is obtained. This equation includes effect of particle's own field. The self force produces a time-changing inertial mass.
Geometric Constraint in Brane-World
E. M. Monte
2006-02-15
The brane-worlds model was inspired partly by Kaluza-Klein's theory, where the gravitation and the gauge fields are obtained of a geometry of higher dimension (bulk). Such a model has been showing positive in the sense of we find perspectives and probably deep modifications in the physics, such as: Unification in a scale TeV, quantum gravity in this scale and deviation of Newton's law for small distances. One of the principles of this model is to suppose a space-time embedded in a bulk of high dimension. In this note it is shown, basing on the theorem of Collinson-Szekeres, that the space-time of Schwarzschild cannot be embedded locally and isometrically in a bulk of five dimensions with constant curvature,(for example ADS-5). From the point of view of the semi-Riemannian geometry this last result consists constraints to the model brane-world.
Foundation of Hydrodynamics for Systems with Strong Interactions
Cheuk-Yin Wong
2010-11-30
For a dense and strongly interacting system, such as a nucleus or a strongly-coupled quark-gluon plasma, the foundation of hydrodynamics can be better found in the quantum description of constituents moving in the strong mean fields generated by all other particles. Using the result that the Schroedinger equation and the Klein-Gordon equation can be written in hydrodynamical forms, we find that the probability currents of the many-body system in the mean-field description obey a hydrodynamical equation with stress tensors arising from many contributions: quantum effects, mean-field interactions, and thermal fluctuations. The influence of various contributions to the hydrodynamical motion is expected to vary with the temperature, as the quantum and mean-field stress tensors playing more important roles at low and moderate temperatures.
The relativistic Pauli equation
David Delphenich
2012-07-24
After discussing the way that C2 and the algebra of complex 2x2 matrices can be used for the representation of both non-relativistic rotations and Lorentz transformations, we show that Dirac bispinors can be more advantageously represented as 2x2 complex matrices. One can then give the Dirac equation a form for such matrix-valued wave functions that no longer necessitates the introduction of gamma matrices or a choice for their representation. The minimally-coupled Dirac equation for a charged spinning particle in an external electromagnetic field then implies a second order equation in the matrix-valued wave functions that is of Klein-Gordon type and represents the relativistic analogue of the Pauli equation. We conclude by presenting the Lagrangian form for the relativistic Pauli equation.
Dilatonic wormholes: construction, operation, maintenance and collapse to black holes
Sean A. Hayward; Sung-Won Kim; Hyunjoo Lee
2001-10-18
The CGHS two-dimensional dilaton gravity model is generalized to include a ghost Klein-Gordon field, i.e. with negative gravitational coupling. This exotic radiation supports the existence of static traversible wormhole solutions, analogous to Morris-Thorne wormholes. Since the field equations are explicitly integrable, concrete examples can be given of various dynamic wormhole processes, as follows. (i) Static wormholes are constructed by irradiating an initially static black hole with the ghost field. (ii) The operation of a wormhole to transport matter or radiation between the two universes is described, including the back-reaction on the wormhole, which is found to exhibit a type of neutral stability. (iii) It is shown how to maintain an operating wormhole in a static state, or return it to its original state, by turning up the ghost field. (iv) If the ghost field is turned off, either instantaneously or gradually, the wormhole collapses into a black hole.
Science at the Theatre - Extreme Science - Promo Video
Klein, Spencer
2013-05-29
On Feb. 27 at 7 pm at the Berkeley Repertory Theatre, join four Berkeley Lab scientists as they discuss extreme science -- and what it means to you. Topics include: Neutrino hunting in Antarctica. Learn why Spencer Klein goes to the ends of the Earth to search for these ghostly particles. From Chernobyl to Central Asia, Tamas Torok travels the globe to study microbial diversity in extreme environments. Andrew Minor uses the world's most advanced electron microscopes to explore materials at ultrahigh stresses and in harsh environments. And microbes that talk to computers? Caroline Ajo-Franklin is pioneering cellular-electrical connections that could help transform sunlight into fuel. Go here for more information and to view videos of previous Science at the Theater events: http://www.lbl.gov/LBL-PID/fobl/
Coupled symplectic maps as models for subdiffusive processes in disordered Hamiltonian lattices
Chris G. Antonopoulos; Tassos Bountis; Lambros Drossos
2015-08-01
We investigate dynamically and statistically diffusive motion in a chain of linearly coupled 2-dimensional symplectic McMillan maps and find evidence of subdiffusion in weakly and strongly chaotic regimes when all maps of the chain possess a saddle point at the origin and the central map is initially excited. In the case of weak coupling, there is either absence of diffusion or subdiffusion with $q>1$-Gaussian probability distributions, characterizing weak chaos. However, for large enough coupling and already moderate number of maps, the system exhibits strongly chaotic ($q\\approx 1$) subdiffusive behavior, reminiscent of the subdiffusive energy spreading observed in a disordered Klein-Gordon Hamiltonian. Our results provide evidence that coupled symplectic maps can exhibit physical properties similar to those of disordered Hamiltonian systems, even though the local dynamics in the two cases is significantly different.
D. Khangulyan; F. Aharonian
2005-03-23
In this paper we study formation broad band energy spectra of electrons due to synchrotron radiation and inverse Compton (IC) scattering. The effect of transition of IC cooling from the Thomson regime to the Klein-Nishina regime can be very significant in the environments where radiation density dominates over the magnetic field density. We discuss impact of this effect on the formation of synchrotron and IC radiation components of TeV electrons in binary systems with very luminous optical stars. Such a scenario can be realized, for example, at the wind termination shock of the pulsar in PSR B1259-63/SS2883 or in the jets of microquasars. The calculations are based on the solution of Boltzmann equation using precise differential Compton cross-section.
Signals for Low Scale Gravity in the Process $??\\to ZZ$
Micheal S. Berger; Brandon Zerbe
2005-08-03
We investigate the sensitivity of future photon-photon colliders to low scale gravity scenarios via the process $\\gamma\\gamma \\to ZZ$ where the Kaluza-Klein boson exchange contributes only when the initial state photons have opposite helicity. We contrast this with the situation for the process $\\gamma \\gamma \\to \\gamma \\gamma$ where the $t$ and $u$ channel also contribute. We include the one-loop Standard Model background whose interference with the graviton exchange determines the experimental reach in measuring any deviation from the Standard Model expectations and explore how polarization can be exploited to enhance the signal over background. We find that a 1 TeV linear collider has an experimental reach to mass scale of about 4 TeV in this channel.