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katz and vafa @xcite showed how charged matter can arise geometrically by the deformation of ade - type orbifold singularities in type iia , m - theory , and f - theory compactifications . in this paper we use those same basic ingredients , used there to geometrically engineer specific matter representations , here to ... |
the recently updated data of the twin kilohertz quasi - periodic oscillations ( khz qpos ) in the neutron star low - mass x - ray binaries are analyzed . the power - law fitting @xmath0 and linear fitting @xmath1 are applied , individually , to the data points of four z sources ( gx 17 + 2 , gx 340 + 0 , gx 5 - 1 and s... |
this paper develops a contention - based opportunistic feedback technique towards relay selection in a dense wireless network . this technique enables the forwarding of additional parity information from the selected relay to the destination . for a given network , the effects of varying key parameters such as the feed... |
we propose a hodge field theory construction that captures algebraic properties of the reduction of zwiebach invariants to gromov - witten invariants . it generalizes the barannikov - kontsevich construction to the case of higher genera correlators with gravitational descendants . we prove the main theorem stating that... |
entangling and disentangling capacities are the key manifestation of the nonlocal content of a quantum operation . a lot of effort has been put recently into investigating ( dis)entangling capacities of unitary operations , but very little is known about capacities of non - unitary operations . here we investigate ( di... |
during the last three decades , evidence has mounted that star and planet formation is not an isolated process , but is influenced by current and previous generations of stars . although cool stars form in a range of environments , from isolated globules to rich embedded clusters , the influences of other stars on cool... |
in the previous study ( hiremath 2006a ) , the solar cycle is modeled as a forced and damped harmonic oscillator and from all the 22 cycles ( 1755 - 1996 ) , long - term amplitudes , frequencies , phases and decay factor are obtained . using these physical parameters of the previous 22 solar cycles and by an _ autoregr... |
kinetically constrained spin models are known to exhibit dynamical behavior mimicking that of glass forming systems . they are often understood as coarse - grained models of glass formers , in terms of some `` mobility '' field . the identity of this `` mobility '' field has remained elusive due to the lack of coarse -... |
spectral diagnostic features formed in the solar chromosphere are few and difficult to interpret they are neither formed in the optically thin regime nor in local thermodynamic equilibrium ( lte ) . to probe the state of the chromosphere , both from observations and theory , it is therefore necessary with modeling . i... |
cosmological shock waves result from supersonic flow motions induced by hierarchical clustering of nonlinear structures in the universe . these shocks govern the nature of cosmic plasma through thermalization of gas and acceleration of nonthermal , cosmic - ray ( cr ) particles . we study the statistics and energetics ... |
density - functional theory has been applied to investigate systematics of sodium clusters na@xmath0 in the size range of @xmath1= 39 - 55 . a clear evolutionary trend in the growth of their ground - state geometries emerges . the clusters at the beginning of the series ( @xmath1=39 - 43 ) are symmetric and have partia... |
the approximate atomic self - interaction corrections ( asic ) method to density functional theory is put to the test by calculating the exchange interaction for a number of prototypical materials , critical to local exchange and correlation functionals . asic total energy calculations are mapped onto an heisenberg pai... |
we present observations of a solar quiet region obtained by the ground - based dutch open telescope ( dot ) , and by instruments on the spacecraft soho and trace . the observations were obtained during a coordinated observing campaign on october 2005 . the aim of this work is to present the rich diversity of fine - sca... |
we study ground state properties and excitation spectra for hard - core bosons on square and triangular lattices , at half filling , using series expansion methods . nearest - neighbor repulsion between the bosons leads to the development of short - range density order at the antiferromagnetic wavevector , and simultan... |
a gravitating global k - monopole produces a tiny gravitational field outside the core in addition to a solid angular deficit in the k - field theory . as a new feature , the gravitational field can be attractive or repulsive depending on the non - canonical kinetic term . |
vimos is a wide - field imager and spectrograph mounted on ut3 at the vlt , whose fov consists of four 7x8 quadrants . here we present the measurements of total transmission profiles i.e. the throughput of telescope + instrument for the broad band filters u , b , v , r , i , and z for each of its four quadrants . thos... |
the lifshitz - type formulas describing the free energy and the force of the van der waals interaction between an atom ( molecule ) and a single - wall carbon nanotube are obtained . the single - wall nanotube is considered as a cylindrical sheet carrying a two - dimensional free electron gas with appropriate boundary ... |
a new _ xmm - newton _ observation has made possible a detailed study of both lobes of the radio galaxy pictor a. their x - ray emission is of non thermal origin and due to inverse compton scattering of the microwave background photons by relativistic electrons in the lobes , as previously found . in both lobes , the ... |
the problem of characterizing complexity of quantum dynamics - in particular of locally interacting chains of quantum particles - will be reviewed and discussed from several different perspectives : ( i ) stability of motion against external perturbations and decoherence , ( ii ) efficiency of quantum simulation in ter... |
if dark matter decays to electromagnetically - interacting particles , it can inject energy into the baryonic gas and thus affect the processes of recombination and reionization . this leaves an imprint on the cosmic microwave background ( cmb ) : the large - scale polarization is enhanced , and the small - scale tempe... |
recently @xmath0 data obtained from differential ages of galaxies have been proposed as a new geometrical probe of dark energy . in this paper we use those data , combined with other background tests ( cmb shift and snia data ) , to constrain a set of general relativistic dark energy models together with some other mod... |
if predictions for species extinctions hold , then the ` tree of life ' today may be quite different to that in ( say ) 100 years . we describe a technique to quantify how much each species is likely to contribute to future biodiversity , as measured by its expected contribution to phylogenetic diversity . our approach... |
we wish to transmit messages to and from a hypersonic vehicle around which a plasma sheath has formed . for long distance transmission , the signal carrying these messages must be necessarily low frequency , typically 2 ghz , to which the plasma sheath is opaque . the idea is to use the plasma properties to make the pl... |
based on the results of numerical modeling , it is shown that dipole - dipole interactions among atoms in the active medium influences strongly the character of the associated superradiation . the main effect is to make the nuclear subsystem behave chaotically . its strength increases with the atom density , and leads ... |
we update the analytical estimate of the final spin of a coalescing black - hole binary derived within the effective - one - body ( eob ) approach . we consider unequal - mass non - spinning black - hole binaries . it is found that a more complete account of relevant physical effects ( higher post - newtonian accuracy ... |
we perform a time - dependent study of the driven dynamics of overdamped particles which are placed in a one - dimensional , piecewise linear random potential . this set - up of spatially quenched disorder then exerts a dichotomous varying random force on the particles . we derive the path integral representation of th... |
this paper includes a reflection on the role of networks in the study of english language acquisition , as well as a collection of practical criteria to annotate free - speech corpora from children utterances . at the theoretical level , the main claim of this paper is that syntactic networks should be interpreted as t... |
we present time - resolved photoluminescence measurements on two series of oligo-_p_-phenylenevinylene materials that self - assemble into supramolecular nanostructures with thermotropic reversibility in dodecane . one set of derivatives form chiral , helical stacks while the second set form less organised , ` frustrat... |
high resolution molecular line observations of , , , and were obtained toward the starless globule in order to investigate its kinematics and chemistry . the hco@xmath0 and cs spectra show clear self - reversed and asymmetric profiles across the face of the globule . the sense of the observed asymmetry is indicative... |
we present here a review of the fundamental topics of hartree - fock theory in quantum chemistry . from the molecular hamiltonian , using and discussing the born - oppenheimer approximation , we arrive to the hartree and hartree - fock equations for the electronic problem . special emphasis is placed in the most releva... |
we present a scaling law that predicts the values of the stresses obtained in numerical simulations of saturated mri - driven turbulence in non - stratified shearing boxes . it relates the turbulent stresses to the strength of the vertical magnetic field , the sound speed , the vertical size of the box , and the numeri... |
in this paper , we propose a quantum field theoretical renormalization group approach to the vortex dynamics of magnetically coupled layered superconductors , to supplement our earlier investigations on the josephson - coupled case . we construct a two - dimensional multi - layer sine - gordon type model which we map o... |
in this paper the benefits provided by multi - cell processing of signals transmitted by mobile terminals which are received via dedicated relay terminals ( rts ) are assessed . unlike previous works , each rt is assumed here to be capable of full - duplex operation and receives the transmission of adjacent relay termi... |
following an old idea of fritz zwicky , we make an attempt to establish a `` universal '' mass function for astronomical objects on all scales . the object classes considered are : solar system planets and small bodies , exoplanets , brown dwarfs , stars and stellar remnants , open and globular clusters , molecular clo... |
with the great success in simulating many intelligent behaviors using computing devices , there has been an ongoing debate whether all conscious activities are computational processes . in this paper , the answer to this question is shown to be no . a certain phenomenon of consciousness is demonstrated to be fully repr... |
this contribution briefly reviews the reverberation mapping technique which leads to determination of black hole masses . i focus on the emerging relation between the broad - line region size and the active galactic nucleus ( agn ) luminosity , and on an overview of recent results of reverberation mapping studies which... |
we derive the exact solution for the optical conductivity @xmath0 of one hole in the holstein-@xmath1-@xmath2 model in the framework of dynamical mean - field theory ( dmft ) . we investigate the magnetic and phonon features associated with polaron formation as a function of the exchange coupling @xmath2 , of the elect... |
we investigate the effects of risk perception in a simple model of epidemic spreading . we assume that the perception of the risk of being infected depends on the fraction of neighbors that are ill . the effect of this factor is to decrease the infectivity , that therefore becomes a dynamical component of the model . w... |
new radio observations of the counterpart of the ultraluminous x - ray source in ngc 5408 show for the first time that the radio emission is resolved with an angular size of @xmath0 to @xmath1 . this corresponds to a physical size of 3546 pc , and rules out interpretation of the radio emission as beamed emission from ... |
we report the detection of periodic ( @xmath0 hours ) bursts of extremely bright , 100% circularly polarized , coherent radio emission from the m9 dwarf tvlm 513 - 46546 . simultaneous photometric monitoring observations have established this periodicity to be the rotation period of the dwarf . these bursts , which wer... |
we show that hard - scattering factorization is violated in the production of high-@xmath0 hadrons in hadron - hadron collisions , in the case that the hadrons are back - to - back , so that @xmath1 factorization is to be used . the explicit counterexample that we construct is for the single - spin asymmetry with one b... |
recent results from the hess gamma ray telescope have shown the presence of both a diffuse , extended , flux of gamma rays above @xmath00.4 tev and discrete sources in and near the galactic centre . here , we put forward a possible explanation in terms of the diffusion of cosmic ray protons from a succession of superno... |
superluminal motion is a common feature of radio jets in powerful @xmath0-ray emitting active galactic nuclei . conventionally , the variable emission is assumed to originate near the central supermassive black - hole where the jet is launched on parsec scales or smaller . here , we report the discovery of superluminal... |
synthetic bio - molecular spiders with `` legs '' made of single - stranded segments of dna can move on a surface which is also covered by single - stranded segments of dna complementary to the leg dna . in experimental realizations , when a leg detaches from a segment of the surface for the first time it alters that s... |
i describe a bayesian method to account for measurement errors in linear regression of astronomical data . the method allows for heteroscedastic and possibly correlated measurement errors , and intrinsic scatter in the regression relationship . the method is based on deriving a likelihood function for the measured data... |
the behavior of interacting populations typically displays irregular temporal and spatial patterns that are difficult to reconcile with an underlying deterministic dynamics . a classical example is the heterogeneous distribution of plankton communities , which has been observed to be patchy over a wide range of spatial... |
in the present work , the non - spherical dust grain characteristics of comet hale - bopp are studied using the t - matrix method and the modified power law distribution function . it is found that the observed data fits very well with the power index ( @xmath0 . the best fit values of complex refractive index @xmath1 ... |
the performance of telescope systems working at microwave or visible / ir wavelengths is typically described in terms of different parameters according to the wavelength range . most commercial ray tracing packages have been specifically designed for use with visible / ir systems and thus , though very flexible and sop... |
the composite torsional ultrasonic oscillator , a versatile experimental system , can be used to investigate slip of newtonian fluid at a smooth surface . a rigorous analysis of slip - dependent damping for the oscillator is presented . initially , the phenomenon of finite surface slip and the slip length are considere... |
we provide a comprehensive , up - to - date analysis of possible new physics contributions to the mass difference @xmath0 in @xmath1-@xmath2 mixing . we consider the most general low energy effective hamiltonian and include leading order qcd running of effective operators . we then explore an extensive list of possible... |
the neutrinos detected from the next galactic core - collapse supernova will contain valuable information on the internal dynamics of the explosion . one mechanism leading to a temporal evolution of the neutrino signal is the variation of the induced neutrino flavor mixing driven by changes in the density profile . wit... |
we report on the development of a technique for precise radial - velocity measurements of cool stars and brown dwarfs in the near infrared . our technique is analogous to the iodine ( @xmath0 ) absorption cell method that has proven so successful in the optical regime . we rely on telluric ch@xmath1 absorption features... |
we describe an expansion of the solution of the wave equation in the de sitter schwarzschild metric in terms of resonances . the main term in the expansion is due to a zero resonance . the error term decays polynomially if we permit a logarithmic derivative loss in the angular directions and exponentially if we permit... |
results for the cross sections of the exclusive @xmath0o(e , e@xmath1pn)@xmath2n and @xmath0o(@xmath3,pn)@xmath2n knockout reactions are presented and discussed in different kinematics . in comparison with earlier work , a complete treatment of the center - of - mass ( cm ) effects in the nuclear one - body current is ... |
we examine the question of whether the formal expressions of equilibrium statistical mechanics can be applied to time independent non - dissipative systems that are not in true thermodynamic equilibrium and are nonergodic . by assuming the phase space may be divided into time independent , locally ergodic domains , we ... |
we analyze a recently proposed method to create fractional quantum hall ( fqh ) states of atoms confined in optical lattices [ a. srensen _ et al . _ , phys . rev . lett . * 94 * 086803 ( 2005 ) ] . extending the previous work , we investigate conditions under which the fqh effect can be achieved for bosons on a lattic... |
we present the _ suzaku _ broad band observations of two agns detected by the _ swift_/bat hard x - ray ( @xmath015 kev ) survey that did not have previous x - ray data , swift j0601.98636 and swift j0138.64001 . the _ suzaku _ spectra reveals in both objects a heavily absorbed power law component with a column densi... |
we study the single transverse - spin asymmetry for dijet production in hadronic collisions in both the collinear qcd factorization approach and the brodsky - hwang - schmidt model . we show that a nonvanishing asymmetry is generated by both initial - state and final - state interactions , and that the final - state in... |
we compute the coleman weinberg effective potential for the higgs field in rs gauge - higgs unification scenarios based on a bulk @xmath0 gauge symmetry , with gauge and fermion fields propagating in the bulk and a custodial symmetry protecting the generation of large corrections to the @xmath1 parameter and the coupli... |
in a quantizing magnetic field , the two - dimensional electron ( 2deg ) gas has a rich phase diagram with broken translational symmetry phases such as wigner , bubble , and stripe crystals . in this paper , we derive a method to get the dynamical matrix of these crystals from a calculation of the density response func... |
vibrational energy transfer of the amide i mode of n - methylacetamide ( nma ) is studied theoretically using the vibrational configuration interaction method . a quartic force field of nma is constructed at the b3lyp/6 - 31g+(d ) level of theory and its accuarcy is checked by comparing the resulting anharmonic frequen... |
models which accelerate the expansion of the universe through the addition of a function of the ricci scalar @xmath0 leave a characteristic signature in the large - scale structure of the universe at the compton wavelength scale of the extra scalar degree of freedom . we search for such a signature in current cosmologi... |
we briefly recall the physical background of the transport of angular momentum and the mixing of chemicals inside stellar radiation zones and its importance for stellar evolution . then , we describe its present modeling , its successes and its weaknesses . next , we introduce the new theoretical developments that allo... |
we study the @xmath0 and @xmath1 signatures @xmath2 for different values of @xmath3 in the msugra model . with @xmath3 rising , we observe a characteristic change in the shape of dilepton mass spectra in @xmath4 versus @xmath5 final states reflecting the decrease of @xmath6 branching ratio . we also study the non msugr... |
we report the detection of 21-cm absorption at @xmath0 towards 1622 + 238 ( 3c336 ) . the line is very broad with a full - width half maximum ( fwhm ) of 235 , giving a velocity integrated optical depth of @xmath1 . the centroid of the line is offset from that of the known damped lyman-@xmath2 absorption ( dla ) system... |
we derive the proper motions , membership probabilities , and velocity dispersions of stars in the regions of the young ( @xmath0 myr - old ) open clusters ngc 2244 ( the central cluster in the monoceros r2 association ) and ngc 6530 ( the dominant cluster in the sgr ob1 association ) from photographic plate material o... |
the possibility of an alternative way to formulate the hawking radiation in a static schwarzschild spacetime has been explored . to calculate the hawking radiation , there can be two possible choices of the spacetime wedge pairs in the krucal - szekeres coordinates . one is the wedge pair consists of exterior spacetime... |
ferromagnetism in the @xmath0-@xmath1 hubbard model is investigated on a square lattice . correlation effects in the form of self - energy and vertex corrections are systematically incorporated within a spin - rotationally - symmetric scheme which explicitly preserves the goldstone mode and is therefore in accord with ... |
adaptive populations such as those in financial markets and distributed control can be modeled by the minority game . we consider how their dynamics depends on the agents initial preferences of strategies , when the agents use linear or quadratic payoff functions to evaluate their strategies . we find that the fluctuat... |
we propose a method to perform precision measurements of the interaction parameters in systems of @xmath0 ultra - cold spin @xmath1 atoms . the spectroscopy is realized by first creating a coherent spin superposition of the two relevant internal states of each atom and then letting the atoms evolve under a squeezing ha... |
building on work of barker , humpherys , lafitte , rudd , and zumbrun in the shock wave case , we study stability of compressive , or `` shock - like '' , boundary layers of the isentropic compressible navier stokes equations with @xmath0-law pressure by a combination of asymptotic ode estimates and numerical evans fu... |
a model of dense plasmas relying on the superconfiguration approximation is presented . in each superconfiguration the nucleus is totally screened by the electrons in a wigner - seitz sphere ( ion - sphere model ) . superconfigurations of the same charge are grouped into ions . it is shown that boundary values of the w... |
the ground state carrier dynamics in self - assembled ( in , ga)as / gaas quantum dots has been studied using time - resolved photoluminescence _ and _ transmission . by varying the dot design with respect to confinement and doping , the dynamics is shown to follow in general a non - exponential decay . only for specif... |
we present our new scheme for the classification of radial stellar surface brightness profiles for disk galaxies . we summarize the current theoretical attempts to understand their origin and give an example of an application by comparing local galaxies with their counterparts at high redshift ( @xmath0 ) . + |
we propose a scenario in which the dark components of the universe are manifestations of a single bulk viscous fluid . using dynamical system methods , a qualitative study of the homogeneous , isotropic background scenario is performed in order to determine the phase space of all possible solutions . the specific model... |
angular momentum in protostellar discs can be transported either radially , through turbulence induced by the magnetorotational instability ( mri ) , or vertically , through the torque exerted by a large - scale magnetic field . we present a model of steady - state discs where these two mechanisms operate at the same r... |
we examine aspects of primordial star formation in the presence of a molecular hydrogen - dissociating ultraviolet background . we compare a set of amr hydrodynamic cosmological simulations using a single cosmological realization but with a range of ultraviolet background strengths in the lyman - werner band . this all... |
in this paper we explore a possibility that all transport turbulent models are contained in a coarse - grained kinetic equation . building on a recent work by h.chen et al ( 2004 ) , we account for fluctuations of a single -point probability density in turbulence , by introducing a``two - level '' ( @xmath0)-phase - sp... |
we examine the possibility of distinguishing a supersymmetric gluino from a kaluza - klein gluon of universal extra dimensions ( ued ) at the large hadron collider ( lhc ) . we focus on the case when all kinematically allowed tree - level decays of this particle are 3-body decays into two jets and a massive daughter ( ... |
distributional sources of matter on codimension - two and higher branes are only well - defined as regularized objects . nevertheless , intuition from effective field theory suggests that the low - energy physics on such branes should be independent of any high - energy regularization scheme . in this paper , we addres... |
the total entropy production generated by the dynamics of an externally driven systems exchanging energy and matter with multiple reservoirs and described by a master equation is expressed as the sum of three contributions , each corresponding to a distinct mechanism for bringing the system out of equilibrium : nonequi... |
i utilize the petrov - galerkin formulation and develop a new method for solving the unsteady collisionless boltzmann equation in both the linear and nonlinear regimes . in the first order approximation , the method reduces to a linear eigenvalue problem which is solved using standard numerical methods . i apply the me... |
a comodule algebra @xmath0 over a hopf algebra @xmath1 with bijective antipode is called principal if the coaction of @xmath1 is galois and @xmath0 is @xmath1-equivariantly projective ( faithfully flat ) over the coaction - invariant subalgebra @xmath2 . we prove that principality is a piecewise property : given @xmat... |
there is a strong connection between the formation of a disk galaxy and the properties of the interstellar medium ( ism ) . theoretical work has typically either focused on the cosmological buildup of a galaxy with a relatively crude model for the gas physics , or examined local processes in the ism and ignored the glo... |
optical photometric and spectroscopic data are presented that show an association of an ultraluminous x - ray source in ngc 7331 with a young star cluster of mass @xmath0 m@xmath1 and age @xmath2 myr . if the ulx is part of the bright stellar cluster , then the mass of the progenitor of the compact accretor must ha... |
we present results from _ chandra _ and _ xmm - newton _ spectroscopic observations of the nuclei of @xmath0 radio galaxies and quasars from the 3crr catalog , and examine in detail the dichotomy in the properties of low- and high - excitation radio galaxies . the x - ray spectra of low - excitation sources ( those wit... |
collisions of antiprotons with he- , ne- , ni - like , bare , and neutral uranium are studied theoretically for scattering angles close to 180@xmath0 and antiproton energies with the interval 100 ev 10 kev . we investigate the coulomb glory effect which is caused by a screening of the coulomb potential of the nucleus ... |
in order to understand the first stages of the nucleation of carbon nanotubes in catalytic processes , we present a tight - binding monte carlo study of the stability and cohesive mechanisms of different carbon structures deposited on nickel ( 100 ) surfaces . depending on the geometry , we obtain contrasted results . ... |
malin 1 has long been considered a prototype giant , dark matter dominated low surface brightness galaxy . two recent studies , one based on a re - analysis of vla hi observations and the other on an archival hubble i - band image , throw a new light on this enigmatic galaxy and on its dark / luminous matter propertie... |
we classify 329 late - type giants within 1 parsec of sgr a@xmath0 , using the adaptive optics integral field spectrometer sinfoni on the vlt . these observations represent the deepest spectroscopic data set so far obtained for the galactic center , reaching a 50% completeness threshold at the approximate magnitude of ... |
the photoproduction of quarkonium in coherent hadron - hadron ( @xmath0 ) interactions for lhc energies is an important tool to investigate the qcd dynamics at high energies . in this paper we estimate the integrated cross section and rapidity distribution for @xmath1 and @xmath2 production using the color glass conden... |
motivated by a proposal of daykin @xcite , we study the wave that propagates along an infinite chain of dominoes and find the limiting speed of the wave in an extreme case . + * keywords * : dominoes , waves , modelling , mechanics + * ams subject classification * : 70b99 , 70f35 , 97a90 + * doi * : 10.1137/s0036144504... |
we analyze the line radiative transfer in protoplanetary disks using several approximate methods and a well - tested accelerated monte carlo code . a low - mass flaring disk model with uniform as well as stratified molecular abundances is adopted . radiative transfer in low and high rotational lines of co , c@xmath0o ,... |
_ xmm - newton _ and _ chandra _ observations of the transient 7.8 s pulsar are used to characterize its pulse shape and spectrum , and to facilitate a search for an optical or infrared counterpart . in outburst , the absorbed , hard x - ray spectrum with @xmath0 and @xmath1 @xmath2 is typical of x - ray binary pu... |
the impact of hst photometry and european astronomy in studies concerning the star formation histories of resolved galaxies is described . our current knowledge of the star formation history of systems within 10 - 20 mpc , as derived from the colour - magnitude diagrams of their resolved stellar populations , is review... |
in this article we develop quantum algorithms for learning and testing _ juntas _ , i.e. boolean functions which depend only on an unknown set of @xmath0 out of @xmath1 input variables . our aim is to develop efficient algorithms : whose sample complexity has no dependence on @xmath1 , the dimension of the domain th... |
we study the properties and the molecular content of the host of a type - ia supernova ( sn1997ey ) . this @xmath0 host is the brightest submillimetre source of the sample of type - ia supernova hosts observed at 450@xmath1 m and 850@xmath1 m by @xcite . observations were performed at iram-30 m to search for co(2 - 1 )... |
in earlier work , the abstract state machine thesis that arbitrary algorithms are behaviorally equivalent to abstract state machines was established for several classes of algorithms , including ordinary , interactive , small - step algorithms . this was accomplished on the basis of axiomatizations of these classes o... |
we discuss fragmentation mechanisms and isospin transport occurring in central collisions between neutron rich systems at fermi energies . in particular , isospin effects are analyzed looking at the correlations between fragment isotopic content and kinematical properties . simulations are based on an approximate solut... |
the loop expansion is applied to a chiral effective hadronic lagrangian ; with the techniques of infrared regularization , it is possible to separate out the short - range contributions and to write them as local products of fields that are already present in our lagrangian . ( the appropriate field variables must be r... |
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