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astro-ph9806269 | i | a search for unresolved white dwarfs in binary systems with optically brighter normal stellar companions has been conducted with iue during its final year of operation . targets were chosen among the fainter and still un - identified euv sources in the rosat 2re catalogue ( pye et al . one new system was discovered ( r... | one new system , re j0500 ( daf6/7v ) , has been identified . the very low line - of - sight neutral hydrogen volume density to this object could place a lower limit on the length of the cma interstellar tunnel of diffuse gas , which stretches away from the local bubble in a similar direction to re j0500 . in this ... | the rosat wide field camera ( wfc ) survey of the extreme ultraviolet ( euv ) has provided us with evidence for the existence of a previously unidentified sample of hot white dwarfs in unresolved , detached binary systems . these stars are invisible at optical wavelengths due to the close proximity of their much more l... |
1604.04868 | i | @xcite conducted a comparison project of numerical simulations of the formation of a massive cluster of galaxies in a cold dark matter ( cdm ) universe in which the results of twelve independent simulation codes were compared . both eulerian mesh codes and lagrangian smoothed particle hydrodynamics ( hereafter sph ; * ... | the santa barbara cluster comparison project revealed that there is a systematic difference between entropy profiles of clusters of galaxies obtained by eulerian mesh and lagrangian smoothed particle hydrodynamics ( sph ) codes : mesh codes gave a core with a constant entropy whereas sph codes did not . one possible re... | the santa barbara cluster comparison project revealed that there is a systematic difference between entropy profiles of clusters of galaxies obtained by eulerian mesh and lagrangian smoothed particle hydrodynamics ( sph ) codes : mesh codes gave a core with a constant entropy whereas sph codes did not . one possible re... |
1604.04868 | r | in this section , we compare the properties of the santa barbara cluster obtained by simulations with ssph and disph , and then investigate the origin of the difference in the entropy profile . we first describe the global properties of the santa barbara cluster in [ sec : results : globalproperties ] . the density , ... | another possible reason is the problem of the sph method , which might give too much `` protection '' to cold clumps because of the unphysical surface tension induced at contact discontinuities . in this paper , we apply the density independent formulation of sph ( disph ) , which can handle contact discontinuities acc... | the santa barbara cluster comparison project revealed that there is a systematic difference between entropy profiles of clusters of galaxies obtained by eulerian mesh and lagrangian smoothed particle hydrodynamics ( sph ) codes : mesh codes gave a core with a constant entropy whereas sph codes did not . one possible re... |
gr-qc0107078 | i | the de sitter s 1917 solution of the vacuum einstein equations with a positive cosmological constant @xmath0 , in which freely moving test particles accelerate away from one another , played a crucial role in the acceptance of expanding standard cosmological models at the end of the 1920s @xcite . it reappeared as the... | special attention is paid to new effects arising in spacetimes which , like de sitter space , have _ spacelike _ conformal infinities . under the presence of particle and event horizons , purely retarded fields ( appropriately defined ) we construct smooth ( outside the sources ) fields involving both retarded and adv... | the scalar and electromagnetic fields produced by the geodesic and uniformly accelerated discrete charges in de sitter spacetime are constructed by employing the conformal relation between de sitter and minkowski space . special attention is paid to new effects arising in spacetimes which , like de sitter space , ha... |
quant-ph9803014 | i | in this paper we are concerned with quantum fields in _ open _ cavities the obvious example of ultimate interest would be electromagnetic fields in optical cavities @xcite and the associated problem of cavity quantum electrodynamics ( cqed ) . such systems are open because energy leaks to the outside ( e.g. , via outp... | the second - quantization of a scalar field in an open cavity is formulated , from first principles , in terms of the quasinormal modes ( qnms ) , which are the eigensolutions of the evolution equation that decay exponentially in time as energy leaks to the outside . thermal correlation functions and cavity feynman pro... | the second - quantization of a scalar field in an open cavity is formulated , from first principles , in terms of the quasinormal modes ( qnms ) , which are the eigensolutions of the evolution equation that decay exponentially in time as energy leaks to the outside . this formulation provides a description involving th... |
astro-ph0501173 | r | the @xmath0 and @xmath1 cmds of stars in the thin disk field are shown in the right hand panels of figures 5 and 6 . the @xmath1 cmd in figure 6 is in many respects similar to the cmds of the ngc 55 fields studied by davidge ( 1998 ) , one of which overlaps with the area observed with the cfhtir . in particular , the p... | comparisons with stellar evolution models suggest that the brightest rsgs have an age near 8 myr . a well - defined plume , which stellar evolution models suggest contains stars with masses near the rsg it is concluded that star formation in the thin disk of ngc 55 has ocurred at a significant rate for at least the pa... | the stellar content of the nearby sb(s)m galaxy ngc 55 is investigated using images obtained with the gemini south and canada - france - hawaii telescopes . the and color - magnitude diagrams ( cmds ) of stars near the plane of the disk reveal signatures of large scale star formation during recent and intermediate epoc... |
astro-ph0501173 | r | the @xmath0 , and @xmath1 cmds of the thick disk and halo portions of the cfhtir strip are shown in figures 16 and 17 . there is a concentration of stars in the thick disk cmds when @xmath114 , which is due to stars evolving on the agb . in constrast , the cmds of the halo region lack an obvious concentration of agb st... | kpc off of the disk plane the brightest agb stars have ages gyr . the colors of the rgb in the extraplanar region are consistent with [ fe / h ] between 2.2 and 0.7 , with the majority of stars having [ fe / h ] , and the mean metallicity inferred from the rgb color does not change with distance above the disk plane . ... | the stellar content of the nearby sb(s)m galaxy ngc 55 is investigated using images obtained with the gemini south and canada - france - hawaii telescopes . the and color - magnitude diagrams ( cmds ) of stars near the plane of the disk reveal signatures of large scale star formation during recent and intermediate epoc... |
astro-ph0501173 | c | moderately deep red and near - infrared images that were obtained with the cfhtir imager on the cfht and the gmos imaging spectrograph on gs have been used to probe the stellar content of the nearby galaxy ngc 55 . the data are used to investigate the stellar content along the disk plane and in the extraplanar region u... | the near - infrared spectral - energy distribution ( sed ) of the integrated light near the center of the galaxy is consistent with that in other magellanic irregular galaxies , indicating that the star - forming history of ngc 55 , when averaged over timescales of 0.1 1 gyr , has likely not been peculiar when compare... | the stellar content of the nearby sb(s)m galaxy ngc 55 is investigated using images obtained with the gemini south and canada - france - hawaii telescopes . the and color - magnitude diagrams ( cmds ) of stars near the plane of the disk reveal signatures of large scale star formation during recent and intermediate epoc... |
1408.2154 | i | social networking services are widely used in modern society as illustrated by the alexa s top 500 global sites statistics where _ facebook _ and _ linkedin _ rank @xmath18nd and @xmath19th respectively in 2014 . such popularity has enabled governments and third - party enterprises to massively collect social network d... | , we introduce-anonymity ; a novel privacy measure aimed at evaluating the resistance of social graphs to active attacks . -anonymity is based on a new problem in graph theory , the _ the proposed algorithm is used to determine the privacy guarantees offered by two real - life social graphs with respect to-anonymity . ... | the study and analysis of social graphs impacts on a wide range of applications , such as community decision making support and recommender systems . with the boom of _ online _ social networks , such analyses are benefiting from a massive collection and publication of social graphs at large scale . unfortunately , ind... |
astro-ph0111591 | i | in the currently standard interpretation of gamma - ray bursts ( grbs ) , the central engine gives rise to a highly relativistic outflow , the ` fireball ' . although the presence of relativistic outflows in grbs has been amply demonstrated by multiwavelength observations of afterglows ( piran 1999 , van paradijs , kou... | we discuss some observational consequences of this precursor plerion , which should provide important tests for the supranova model : 1 ) the fragmentation of the outlying sn ejecta material by the plerion and its implications for fe line emission ; and 2 ) the effect of inverse compton cooling and emission in the grb ... | the supranova model of gamma - ray bursts ( grbs ) , in which the grb event is preceded by a supernova ( sn ) explosion by a few months to years , has recently gained support from fe line detections in the x - ray afterglows of some grbs . a crucial ingredient of this model yet to be studied is the fast - rotating puls... |
astro-ph0111591 | i | we summarize the salient points of our work . in the supranova model of grbs , the fast - rotating smns active during the time between the sn and the grb should drive a luminous plerionic nebula into the preburst environment , with a number of important consequences for the ensuing grb afterglow . rayleigh - taylor ins... | the plerion - induced inverse compton emission can dominate in the gev - tev energy range during the afterglow , being detectable by glast from redshifts and by agile from redshifts , and distinguishable from self - compton emission by its spectrum and light curve . naoj - th - ap 2001 , no.66 | the supranova model of gamma - ray bursts ( grbs ) , in which the grb event is preceded by a supernova ( sn ) explosion by a few months to years , has recently gained support from fe line detections in the x - ray afterglows of some grbs . a crucial ingredient of this model yet to be studied is the fast - rotating puls... |
1110.2102 | r | * proof * : * if part * : assume that the controllable part @xmath52 is @xmath72-dissipative and the assumption in the theorem is satisfied . by propositions [ lmiunctrb ] and [ graphneutral ] , to prove that the behavior @xmath16 is dissipative , it suffices to show the existence of a @xmath259 such that the correspon... | for various reasons , in the context of uncontrollable systems / behaviors , a more appropriate definition of dissipativity is in terms of the dissipation inequality , namely the _ existence _ of a storage function . we first assume that the storage function can be expressed in terms of the external variables and their... | the theory of dissipativity has been primarily developed for controllable systems / behaviors . for various reasons , in the context of uncontrollable systems / behaviors , a more appropriate definition of dissipativity is in terms of the dissipation inequality , namely the _ existence _ of a storage function . a stora... |
1110.2102 | c | we briefly review the main results in this paper . we first used the existence of an observable storage function as the definition of a system s dissipativity and proved that the dissipativities of a behavior and its controllable part are equivalent assuming the uncontrollable poles are unmixed and the dissipativity at... | this main result proof involves new results about solvability of the algebraic riccati equation , and uses techniques from indefinite linear algebra and hamiltonian matrix properties . these results are finally related to rlc realizability of passive networks , specifically to the nonrealizability of the nullator on... | the theory of dissipativity has been primarily developed for controllable systems / behaviors . for various reasons , in the context of uncontrollable systems / behaviors , a more appropriate definition of dissipativity is in terms of the dissipation inequality , namely the _ existence _ of a storage function . a stora... |
cond-mat0304681 | i | molecular motors are proteins that transform the free energy released from chemical reactions into mechanical work . in this article we consider a special class of motor proteins , namely cytoskeletal motors which perform directed walks along cytoskeletal filaments as reviewed in @xcite . in the cell , these motors hav... | these models exhibit boundary - induced phase transitions related to those of the asymmetric simple exclusion process ( asep ) in one dimension . ( b ) fixed motor densities at the two tube ends where radial equilibrium holds locally ; and ( c ) diffusive motor injection at one end and diffusive motor extraction at the... | the traffic of molecular motors through open tube - like compartments is studied using lattice models . these models exhibit boundary - induced phase transitions related to those of the asymmetric simple exclusion process ( asep ) in one dimension . the location of the transition lines depends on the boundary condition... |
cond-mat0304681 | i | let us summarize the main results and add a few comments . we have studied a lattice model for the motion of many molecular motors in an open tube which contains a single filament . when bound to the filament , the motor particles undergo an asymmetric simple exclusion process ( asep ) . in addition , motors can unbind... | the traffic of molecular motors through open tube - like compartments is studied using lattice models . the location of the transition lines depends on the boundary conditions at the two ends of the tubes . three types of boundary conditions are studied : ( a ) periodic boundary conditions which correspond to a closed ... | the traffic of molecular motors through open tube - like compartments is studied using lattice models . these models exhibit boundary - induced phase transitions related to those of the asymmetric simple exclusion process ( asep ) in one dimension . the location of the transition lines depends on the boundary condition... |
1312.4880 | i | local spectral analysis of the solar wind ( sw ) magnetic fields reveals strong time variations in the power level of the turbulent field fluctuations . this variability of the power level of the field fluctuations is responsible for the strong non - gaussianity of the observed pdfs of field variations associated with ... | the power level of turbulence , roughly defined as the power in the transverse field fluctuations normalized to the medium - scale average background field , tightly orders the location of the peaks in the probability distribution functions ( pdfs ) of the angles between local fields and parker spiral . as a result , | the turbulent magnetic fields of a large set of fast solar wind streams measured onboard _ ace _ and _ stereo a _ and _ b _ are analyzed in an effort to identify the effects of the turbulence - level broad variations on the orientations of the local , time - averaged magnetic fields . the power level of turbulence , ro... |
1312.4880 | c | in an effort to identify the effects of the broad variations in turbulence levels on the orientations of the local mean fields , we have analyzed the turbulent magnetic fields of a large set of fast sw streams measured onboard _ ace _ and _ stereo a _ and _ b_. our multiscale fourier analysis of the transverse turbulen... | the turbulent magnetic fields of a large set of fast solar wind streams measured onboard _ ace _ and _ stereo a _ and _ b _ are analyzed in an effort to identify the effects of the turbulence - level broad variations on the orientations of the local , time - averaged magnetic fields . the broad variations in the power ... | the turbulent magnetic fields of a large set of fast solar wind streams measured onboard _ ace _ and _ stereo a _ and _ b _ are analyzed in an effort to identify the effects of the turbulence - level broad variations on the orientations of the local , time - averaged magnetic fields . the power level of turbulence , ro... |
nucl-th9603035 | i | nuclear structure has been discussed mostly in the context of the liquid drop and shell models . these models have been extremely useful in explaining many observed nuclear properties . however , they are based on macroscopic concepts , and do not address the simplest nuclei , hydrogen and helium . furthermore , recent... | the two - nucleon density distributions in states with isospin , spin=1 and projection=0 and are studied inh ,he ,li ando . the dumbbell shapes are generated by rotating tori . the toroidal shapes indicate that the tensor correlations have near maximal strength at fm in all these nuclei . the toroidal distribution has ... | the two - nucleon density distributions in states with isospin , spin=1 and projection=0 and are studied inh ,he ,li ando . the equidensity surfaces for=0 distributions are found to be toroidal in shape , while those of= have dumbbell shapes at large density . the dumbbell shapes are generated by rotating tori . the to... |
nucl-th9603035 | c | the main conclusions of this study of nuclear structure , as predicted by realistic models of nuclear forces , are : \(i ) the static part of the two - nucleon potential in @xmath409 state has a large angular dependence due to the tensor interaction dominated by one - pion exchange . at @xmath410 fm the difference ... | many realistic models of nuclear forces predict these values , which are supported by the observed electromagnetic form factors of the deuteron , and also predicted by classical skyrme effective lagrangians , related to qcd in the limit of infinite colors . due to the rather small size of this structure the tensor corr... | the two - nucleon density distributions in states with isospin , spin=1 and projection=0 and are studied inh ,he ,li ando . the equidensity surfaces for=0 distributions are found to be toroidal in shape , while those of= have dumbbell shapes at large density . the dumbbell shapes are generated by rotating tori . the to... |
1408.0788 | i | inference for graphical models is a topic of contemporary interest , and in this regard , various tools for inference have been proposed in the statistics literature , including establishing sufficient and/or necessary conditions for existence of high dimensional estimators . one important contribution in the area are ... | the wishart distribution , defined on the open convex positive definite cone , plays a central role in multivariate analysis and multivariate distribution theory . its domain of integrability is often referred to as the gindikin set . in recent years , a variety of useful extensions of the wishart have been proposed in... | the wishart distribution , defined on the open convex positive definite cone , plays a central role in multivariate analysis and multivariate distribution theory . its domain of integrability is often referred to as the gindikin set . in recent years , a variety of useful extensions of the wishart have been proposed in... |
math-ph0612075 | i | a _ point process _ in a set @xmath3 is a random collection of points in @xmath3 , whose distribution is described by a probability measure @xmath12 on the set of all possible point collections . here we will take @xmath3 to be @xmath13 , a lattice such as @xmath14 , the torus @xmath15 , a lattice on the torus , or an ... | we describe some necessary and sufficient conditions on the s for this to be true . our primary examples are , , and an arbitrary finite set . in particular , we extend a result by ambartzumian and sukiasian showing realizability at sufficiently small densities . we also investigate in detail a simple example in which ... | there are various situations in which it is natural to ask whether a given collection of functions , , , defined on a set , are the first correlation functions of a point process on . here we describe some necessary and sufficient conditions on the s for this to be true . our primary examples are , , and an arbitrary f... |
hep-th0110007 | i | we begin these lectures with one of our favorite equations @xmath1 this is the bekenstein - hawking area - entropy law , which says that the entropy @xmath2 associated with an event horizon is its area @xmath3 divided by @xmath4 , where @xmath5 is newton s constant @xcite . this is a macroscopic formula . it should be ... | these lectures present an elementary discussion of some background material relevant to the problem of de sitter quantum gravity . the final lecture contains a pedagogical discussion of the appearance of the conformal group as an asymptotic symmetry group , which is central to the ds / cft correspondence . a ( previous... | these lectures present an elementary discussion of some background material relevant to the problem of de sitter quantum gravity . the first two lectures discuss the classical geometry of de sitter space and properties of quantum field theory on de sitter space , especially the temperature and entropy of de sitter spac... |
1412.4142 | i | since the work of arratia @xcite on annihilating random walks , it is known that , when starting with infinitely many supporters of each opinion , the one - dimensional voter model fluctuates , i.e. , the number of opinion changes at each vertex is almost surely infinite . in contrast , as a consequence of irreducibil... | this article is concerned with a general class of stochastic spatial models for the dynamics of opinions . like in the voter model , individuals are located on the vertex set of a connected graph and update their opinion at a constant rate based on the opinion of their neighbors . when the confidence threshold is at le... | this article is concerned with a general class of stochastic spatial models for the dynamics of opinions . like in the voter model , individuals are located on the vertex set of a connected graph and update their opinion at a constant rate based on the opinion of their neighbors . however , unlike in the voter model , ... |
1107.5515 | i | studies of rr lyrae stars in the milky way globular clusters reveal what is traditionally known as the oosterhoff dichotomy ; the tendency for these clusters to be either oosterhoff i ( oo - i ) or oosterhoff ii ( oo - ii ) objects with a relatively clear zone of avoidance between these two groups . the left panel of f... | this is the first in a series of papers studying the variable stars in large magellanic cloud globular clusters . the primary goal of this series is to better understand how the rr lyrae stars in oosterhoff - intermediate systems compare to those in oosterhoff i / ii systems . in this paper we present the results of ou... | this is the first in a series of papers studying the variable stars in large magellanic cloud globular clusters . the primary goal of this series is to better understand how the rr lyrae stars in oosterhoff - intermediate systems compare to those in oosterhoff i / ii systems . in this paper we present the results of ou... |
1506.00395 | i | the progress in three - dimensional ( 3d ) modeling research has been rapid and hectic , fueled by recent breakthroughs in keypoint detection and matching , the advances in computational power of desktop and mobile devices , the advent of digital photography and the subsequent availability of large datasets of public i... | this paper addresses the structure - and - motionproblem , that requires to find camera motion and 3d structure from point matches . moreover , a practical autocalibration procedure allows to process images without ancillary information . experiments with real data assess the accuracy and the computational efficiency o... | this paper addresses the structure - and - motionproblem , that requires to find camera motion and 3d structure from point matches . a new pipeline , dubbed samantha , is presented , that departs from the prevailing sequential paradigm and embraces instead a hierarchical approach . this method has several advantages , ... |
1010.1979 | i | spectropolarimetry continues to be a valuable technique for a broad range of astrophysical studies ( e.g. , adamson 2005 ; bastian 2010 ) , including applications for circumstellar envelopes . advances in technology and access to larger telescopes means an ever growing body of high quality spectropolarimetric data . i... | model line profiles are calculated for simple field topologies of axial fields ( i.e. , vertical to the disk plane ) and toroidal fields ( i.e. , purely azimuthal ) . a scheme for discerning field strengths and geometries in disks is developed based on stokes q - u diagrams for the run of polarization across line profi... | this paper focuses on the polarized profiles of resonance scattering lines that form in magnetized disks . optically thin lines from keplerian planar disks are considered . model line profiles are calculated for simple field topologies of axial fields ( i.e. , vertical to the disk plane ) and toroidal fields ( i.e. , p... |
1010.1979 | c | polarized line profile shapes from magnetized keplerian disks have been calculated under a number of simplifying assumptions : the disk is geometrically thin ; the scattering lines are optically thin ; primarily simple fields were considered ( axial or toroidal ) ; and no account was taken of photospheric absorption li... | this paper focuses on the polarized profiles of resonance scattering lines that form in magnetized disks . optically thin lines from keplerian planar disks are considered . a discussion of the hanle effect for magnetized disks in which the magnetorotational instability ( mri ) is operating is also presented . given tha... | this paper focuses on the polarized profiles of resonance scattering lines that form in magnetized disks . optically thin lines from keplerian planar disks are considered . model line profiles are calculated for simple field topologies of axial fields ( i.e. , vertical to the disk plane ) and toroidal fields ( i.e. , p... |
1102.3160 | i | this article is an offshoot of the authors forthcoming work @xcite . in that paper we will combine a detailed geometric examination of the lagrangian correspondences between symmetric products of riemann surfaces , studied by the second author in @xcite , with the @xmath1 quilted floer theory of mau wehrheim woodward... | this paper is a companion to the authors forthcoming work extending heegaard floer theory from closed 3-manifolds to compact 3-manifolds with two boundary components via quilted floer cohomology . we describe the first interesting case of this theory : the invariants of 3-manifolds bounding , regarded as modules over t... | this paper is a companion to the authors forthcoming work extending heegaard floer theory from closed 3-manifolds to compact 3-manifolds with two boundary components via quilted floer cohomology . we describe the first interesting case of this theory : the invariants of 3-manifolds bounding , regarded as modules over t... |
1505.07531 | i | a discrete sturm - liouville problem ( briefly , slp ) considered in the present paper consists of a discrete sturm - liouville equation ( briefly , sle ) @xmath0,\ ] ] and the boundary condition ( briefly , bc ) @xmath1 where @xmath2 is an integer , @xmath3 and @xmath4 are the forward and backward difference operators... | this paper is concerned with dependence of discrete sturm - liouville eigenvalues on problems . topologies and geometric structures on various spaces of such problems are firstly introduced . it is shown that all problems sufficiently close to a given problem have eigenvalues near each eigenvalue of the given problem . | this paper is concerned with dependence of discrete sturm - liouville eigenvalues on problems . topologies and geometric structures on various spaces of such problems are firstly introduced . then , relationships between the analytic and geometric multiplicities of an eigenvalue are discussed . it is shown that all pro... |
0907.1354 | i | the sources of ultra - high energy cosmic rays have remained elusive in spite of the enormous progress reached on the experimental side , with present day detectors reaching apertures @xmath6km@xmath7 sr yr . the differential energy spectrum , the chemical composition and the distribution of arrival directions on the... | , we show that if one records an anisotropy signal produced by heavy nuclei of charge above an energy , one should record an even stronger ( possibly much stronger ) anisotropy at energies due to the proton component that is expected to be associated with the sources of the heavy nuclei . this conclusion remains robust... | this paper proposes and discusses a test of the chemical composition of ultra - high energy cosmic rays that relies on the anisotropy patterns measured as a function of energy . in particular , we show that if one records an anisotropy signal produced by heavy nuclei of charge above an energy , one should record an eve... |
0907.1354 | c | let us start by summarizing the results obtained so far . we have discussed how one can can test the chemical composition of ultra - high rays on the sky by comparing the anisotropy signals at various energies . our main result is to show that if anisotropies are observed above some energy @xmath1 and the composition i... | this paper proposes and discusses a test of the chemical composition of ultra - high energy cosmic rays that relies on the anisotropy patterns measured as a function of energy . in particular we then discuss a robust lower bound to the magnetic luminosity that a source must possess in order to be able to accelerate par... | this paper proposes and discusses a test of the chemical composition of ultra - high energy cosmic rays that relies on the anisotropy patterns measured as a function of energy . in particular , we show that if one records an anisotropy signal produced by heavy nuclei of charge above an energy , one should record an eve... |
1507.03072 | i | in protein synthesis , the genetic information is deciphered into proteins by molecular machines called ribosomes that attach themselves at the start end of mrna , move along the chain in a unidirectional manner and finally detach at the stop end @xcite . each translation step requires the binding of a freely diffusin... | this work is devoted to the development of a novel theoretical approach , named _ hybrid approach _ , to handle a localized bottleneck in a symmetrically coupled two - channel totally asymmetric simple exclusion process with langmuir kinetics . hybrid approach , bottleneck , monte carlo simulations , langmuir kinetics | this work is devoted to the development of a novel theoretical approach , named _ hybrid approach _ , to handle a localized bottleneck in a symmetrically coupled two - channel totally asymmetric simple exclusion process with langmuir kinetics . the hybrid approach is combined with singular perturbation technique to get... |
1507.03072 | r | in this section , we provide a detailed discussion of the steady - state properties of the proposed model , with emphasis on the resulting phase diagrams and analyze the effects of bottleneck strength , lane - changing rate and binding constant . for simplicity , we assume that the bottleneck in lane a is located exact... | we have thoroughly examined the role played by the strength of bottleneck , binding constant and lane - changing rate in the system dynamics . the appearances of bottleneck - induced shock , a bottleneck phase and meissner phase are explained . further , the critical values of bottleneck rate are identified , which sig... | this work is devoted to the development of a novel theoretical approach , named _ hybrid approach _ , to handle a localized bottleneck in a symmetrically coupled two - channel totally asymmetric simple exclusion process with langmuir kinetics . the hybrid approach is combined with singular perturbation technique to get... |
1406.2717 | i | merging and mass - transferring white dwarfs ( wds ) are responsible for the creation of a variety of exotic astrophysical systems and events . among these are isolated sdb / sdo stars ( likely created by the merger of two he wds ; saio & jeffery 2000 ; han et al . 2002 ; heber 2009 ) , r crb stars ( likely created by ... | however , rotation strongly alters retrograde gravity waves and inertial waves , with important consequences for the tidal spin - down of accreting wds . additionally , we discuss the impact of stokes drift currents on the wave angular momentum flux . finally , we speculate on how tidal interactions will affect super -... | tidal interactions play an important role in the evolution and ultimate fate of compact white dwarf ( wd ) binaries . not only do tides affect the pre - merger state ( such as temperature and rotation rate ) of the wds , but they may also determine which systems merge and which undergo stable mass transfer . in this pa... |
1406.2717 | c | we have examined the effect of the coriolis force on the excitation of dynamical tides in rotating stars , with specific application to white dwarfs in compact binary systems . in particular , we study the dependence of the tidal dissipation on the tidal forcing frequency @xmath133 and rotational parameter @xmath98 . w... | tidal interactions play an important role in the evolution and ultimate fate of compact white dwarf ( wd ) binaries . not only do tides affect the pre - merger state ( such as temperature and rotation rate ) of the wds , but they may also determine which systems merge and which undergo stable mass transfer . in this pa... | tidal interactions play an important role in the evolution and ultimate fate of compact white dwarf ( wd ) binaries . not only do tides affect the pre - merger state ( such as temperature and rotation rate ) of the wds , but they may also determine which systems merge and which undergo stable mass transfer . in this pa... |
1302.6091 | m | the basic necessity for a good spectral analysis of grb pulses is wide band coverage to identify additional spectral components . the gamma - ray burst monitor ( gbm ) on board the fermi satellite , with its wide band width and excellent sensitivity , provides a good data base for such studies . it has two scintillatio... | we choose , from the literature , a set of possible models which includes the band model , blackbody with a power - law ( bbpl ) , a collection of black bodies with a smoothly varying temperature profile , along with a power - law ( mbbpl ) , and two blackbodies with a power - law ( 2bbpl ) . first , we perform time - ... | time - resolved spectral analysis , though a very promising method to understand the emission mechanism of gamma - ray bursts ( grbs ) , is difficult to implement in practice because of poor statistics . we present a new method for pulse - wise time - resolved spectral study of the individual pulses of grbs , using the... |
1302.6091 | c | from purely data analysis point of view , there are essentially two parts in a grb spectrum the peak of the spectrum and the wings , which extend to very low and very high energies . the fundamental difference between a band only model and the models with thermal and non - thermal parts is : while band accounts for th... | we use this method for the two pulses of grb 081221 , the brightest grb with separable pulses . we find that any photospheric emission in terms of black bodies is required mainly in the rising parts of the pulses and the falling part can be adequately explained in terms of the band model , with the low energy photon in... | time - resolved spectral analysis , though a very promising method to understand the emission mechanism of gamma - ray bursts ( grbs ) , is difficult to implement in practice because of poor statistics . we present a new method for pulse - wise time - resolved spectral study of the individual pulses of grbs , using the... |
1310.3642 | c | [ tbl : summary ] llllll object & type & p@xmath25 & p@xmath30 & @xmath4 & remarks + & & ( d ) & ( d ) & & + css0116 + 09 & dn & 0.06582(@xmath75 ) & - & 18.9@xmath62 , 17.1@xmath63 & eclipsing , depth@xmath51.4 mag + css0411 - 09 & su & - & 0.06633(@xmath71 ) & 15.4@xmath10 & superhump + css0438 + 00 & dn & 0.06546... | 14 of these systems have not been observed previously and only two have been examined in - depth . from the observations we determined 12 new orbital periods and independently found a further two . eight of the cvs are eclipsing systems , five of which have eclipse depths of more than 0.9 mag . included in the sample a... | time series photometry of 20 cataclysmic variables detected by the catalina real - time transient survey is presented . 14 of these systems have not been observed previously and only two have been examined in - depth . from the observations we determined 12 new orbital periods and independently found a further two . ei... |
1512.07075 | i | the past few years have seen a large increase in the interest for modeling dynamic interactions between individuals . while many real world data contain continuous - time information on the interactions , as e.g. email exchanges between employees in a company @xcite or face - to - face contact between individuals meas... | to model recurrent interaction events in continuous time , we propose an extension of the stochastic block model where each individual belongs to a latent group and interactions between two individuals follow a conditional inhomogeneous poisson process whose intensity is driven by the individuals latent groups . the mo... | to model recurrent interaction events in continuous time , we propose an extension of the stochastic block model where each individual belongs to a latent group and interactions between two individuals follow a conditional inhomogeneous poisson process whose intensity is driven by the individuals latent groups . the mo... |
1610.06380 | i | according to the generally accepted recycling scenario suggested by @xcite , millisecond pulsars ( msps ) are descendants of neutron stars ( nss ) , which were spun up by accretion from roche - lobe filling companion stars in low - mass x - ray binaries ( lmxbs ) . this scenario has been extensively studied in the lite... | we also demonstrate that the observational set ( b ) requires enhanced r - mode dissipation at low temperatures , k. observational set ( c ) allows us to set an upper limit on the red - shifted internal temperatures of msps , k ( assuming a canonical ns with the accreted crust ) . [ firstpage ] | to put new constraints on the r - mode instability window , we analyse formation of millisecond pulsars ( msps ) within the recycling scenario , making use of three sets of observations : ( a ) x - ray observations of neutron stars ( nss ) in low - mass x - ray binaries ; ( b ) timing of millisecond pulsars ( msps ) ; ... |
1610.06380 | c | we put new constraints on the shape of the r - mode instability window . they follow from the recycling scenario and observations of ( a ) nss in lmxbs ( section [ sec_xray ] ) , ( b ) msp timing ( section [ sec_timing ] ) and ( c ) uv and x - ray observations of msps ( section [ sec_xray_msp ] ) . analysing the observ... | to put new constraints on the r - mode instability window , we analyse formation of millisecond pulsars ( msps ) within the recycling scenario , making use of three sets of observations : ( a ) x - ray observations of neutron stars ( nss ) in low - mass x - ray binaries ; ( b ) timing of millisecond pulsars ( msps ) ; ... | to put new constraints on the r - mode instability window , we analyse formation of millisecond pulsars ( msps ) within the recycling scenario , making use of three sets of observations : ( a ) x - ray observations of neutron stars ( nss ) in low - mass x - ray binaries ; ( b ) timing of millisecond pulsars ( msps ) ; ... |
cond-mat0003218 | i | communication through a noisy channel is a central problem in information theory @xcite . error correcting codes are a widespread method for compensating the information corruption due to the noise , by cleverly increasing the redundancy of the message . turbo codes @xcite are a recently invented class of error correct... | turbo codes are a very efficient method for communicating reliably through a noisy channel . they are mapped onto a class of disordered spin models . the analytical calculations concerning these models are reported here . we prove the existence of a no - error phase and compute its local stability threshold . as a byp... | turbo codes are a very efficient method for communicating reliably through a noisy channel . there is no theoretical understanding of their effectiveness . in ref . they are mapped onto a class of disordered spin models . the analytical calculations concerning these models are reported here . we prove the existence of... |
1408.2501 | i | the concept of topological order @xcite was initiated in the 80 s with the discovery of the fractional quantum hall effect and high temperature superconductivity @xcite . since then it has also been seen in short range resonating valence bond states @xcite and in quantum spin liquids @xcite . once it s usefulness w... | we modify these transfer matrices with perturbations and extract exactly solvable models which remain in a quantum phase , thus nullifying the effect of the perturbation . the implementation of these models can possibly improve the use of quantum double models for fault tolerant quantum computation . more generally for... | two dimensional lattice models such as the quantum double models , which includes the toric code , can be constructed from transfer matrices of lattice gauge theories with discrete gauge groups . these transfer matrices are built out of local operators acting on links , vertices and plaquettes and are parametrized by t... |
astro-ph0204162 | i | it has long been known that the redshifts derived from different quasar emission lines often do not agree with each other within typical measurement errors . ( 1982 ) performed the first detailed study of this phenomenon and concluded that high - ionization , broad , emission lines such as are shifted by a few hundred ... | using a sample of 3814 quasars from the early data release of the sloan digital sky survey , we confirm that high - ionization , broad , emission lines such as are significantly blueshifted with respect to low - ionization , broad , emission lines , such as , which are thought to be close to the systemic redshift . we ... | using a sample of 3814 quasars from the early data release of the sloan digital sky survey , we confirm that high - ionization , broad , emission lines such as are significantly blueshifted with respect to low - ionization , broad , emission lines , such as , which are thought to be close to the systemic redshift . we ... |
astro-ph0204162 | c | the results presented herein will help to constrain models for the belr , in particular , it should be clear that there can not be any doubt as to the reality of the systematic blueshift of emission lines ; this shift _ must _ be accounted for in any agn models . this could be considered a strike against the model of (... | the emission line blueshift and equivalent width of are also discussed in light of the well - known anti - correlation between the equivalent width of emission and continuum luminosity , otherwise known as the baldwin effect . finally , we explore whether the emission line blueshifts correlate with the presence of broa... | using a sample of 3814 quasars from the early data release of the sloan digital sky survey , we confirm that high - ionization , broad , emission lines such as are significantly blueshifted with respect to low - ionization , broad , emission lines , such as , which are thought to be close to the systemic redshift . we ... |
1603.03665 | i | momentum space topology is becoming the important tool for the study of the ground states of condensed matter systems ( for the review see @xcite ) . in particular , the momentum space topological invariants protect gapless fermions on the boundaries of topological insulators @xcite . topological invariants in momentum... | using derivative expansion applied to the wigner transform of the two - point green function we analyse the anomalous quantum hall effect ( aqhe ) , and the chiral magnetic effect ( cme ) . the corresponding currents are proportional to the momentum space topological invariants . we reproduce the conventional expressio... | using derivative expansion applied to the wigner transform of the two - point green function we analyse the anomalous quantum hall effect ( aqhe ) , and the chiral magnetic effect ( cme ) . the corresponding currents are proportional to the momentum space topological invariants . we reproduce the conventional expressio... |
0912.5491 | i | giant star radii have been measured in the past using various interferometers , including the mark iii ( 85 giants and supergiants , * ? ? ? * ) , the palomar testbed interferometer ( 69 giants and supergiants , * ? ? ? * ) , the navy prototype optical interferometer ( 50 giants and supergiants , * ? ? ? * ) , and the ... | using georgia state university s chara array interferometer , we measured angular diameters for 25 giant stars , six of which host exoplanets . our values do not match those derived from spectroscopic observations as well , perhaps due to the inherent properties of the methods used or because of a missing source of ext... | using georgia state university s chara array interferometer , we measured angular diameters for 25 giant stars , six of which host exoplanets . the combination of these measurements and _ hipparcos _ parallaxes produce physical linear radii for the sample . except for two outliers , our values match angular diameters a... |
0905.0410 | i | the fundamental concepts in the fields of cosmology and galaxy formation hinge on the one defining characteristic of galaxies , their age . however , a galaxy s age is a difficult parameter to define observationally . for example , in the current cold dark matter paradigm ( @xmath3cdm , bahcall 1999 ) , a galaxy s age ... | using new narrowband color observations of early - type galaxies in clusters , we reconstruct the color - magnitude relation ( cmr ) with a higher degree of accuracy than previous work . we find that the cmr can not by reproduced by the spectroscopically determined ages and metallicities in any of the samples despite t... | using new narrowband color observations of early - type galaxies in clusters , we reconstruct the color - magnitude relation ( cmr ) with a higher degree of accuracy than previous work . we then use the spectroscopically determined ages and metallicities from three samples ( trager 2008 , thomas 2005 , gallazzi 2006 ) ... |
0905.0410 | c | using a narrowband color system , we have examined the impact of the deduced younger ages for early - type galaxies in clusters proposed by numerous spectroscopic surveys under the lick system . the color - magnitude diagram is the tool of choice for testing sed model colors as one axis ( magnitude ) is limited in its ... | we then use the spectroscopically determined ages and metallicities from three samples ( trager 2008 , thomas 2005 , gallazzi 2006 ) , combined with multi - metallicity sed models , to compare predicted colors for galaxies with young ages ( less than 8 gyr ) with the known cmr . we consider the source of young age esti... | using new narrowband color observations of early - type galaxies in clusters , we reconstruct the color - magnitude relation ( cmr ) with a higher degree of accuracy than previous work . we then use the spectroscopically determined ages and metallicities from three samples ( trager 2008 , thomas 2005 , gallazzi 2006 ) ... |
1404.0012 | c | we used the physically motivated , self - consistent spherical absorption model of @xcite and the mytorus model @xcite to unravel the complexities of the x - ray reprocessor in 19 type 2 [ oiii]-selected agn , 9 of which are seyfert 2 galaxies and 10 of which are obscured quasar candidates . we report , for the first t... | using self - consistent , physically motivated models , we investigate the x - ray obscuration in 19 type 2 [ oiii ] 5007 selected agn , 9 of which are local seyfert 2 galaxies and 10 of which are type 2 quasar candidates . we derive reliable line - of - sight and global column densities for these objects , which is ... | using self - consistent , physically motivated models , we investigate the x - ray obscuration in 19 type 2 [ oiii ] 5007 selected agn , 9 of which are local seyfert 2 galaxies and 10 of which are type 2 quasar candidates . we derive reliable line - of - sight and global column densities for these objects , which is ... |
1507.06872 | r | we employ the theoretical framework presented above to study thermal effects on the @xmath9 and @xmath10 cross sections for two sample nuclei , @xmath121 and @xmath122 . the iron isotope is among the most abundant nuclei at the early stage of the core - collapse , while the neutron - rich germanium isotope can be consi... | we perform a detailed analysis of thermal effects on the strength distribution of allowed gamow - teller transitions which dominate low - energy charged - current neutrino reactions . forfe we compare the calculated finite - temperature cross sections with those obtained from large - scale shell - model calculations . | using the thermal quasiparticle random phase approximation , we study the process of neutrino and antineutrino capture on hot nuclei in supernova environments . for the sample nucleife andge we perform a detailed analysis of thermal effects on the strength distribution of allowed gamow - teller transitions which domina... |
1111.0135 | i | key properties of physical systems can sometimes be understood by mapping them to seemingly unrelated ones . a powerful example of this was provided by laughlin , who observed that the squared norm of his @xmath0 fractional quantum hall trial wavefunction @xmath1 ( where @xmath2 is a complex coordinate in the two - dim... | the plasma differs fundamentally from that which is associated with the two - dimensional xy model and abelian fractional quantum hall states . we find that this unconventional plasma undergoes a berezinskii - kosterlitz - thouless phase transition from an insulator to a metal . this result verifies the required proper... | utilizing large - scale monte - carlo simulations , we investigate an unconventional two - component classical plasma in two dimensions which controls the behavior of the norms and overlaps of the quantum - mechanical wavefunctions of ising - type quantum hall states . the plasma differs fundamentally from that which i... |
1407.4985 | r | as a nearby ( @xmath0320 pc ) , young ( 2 - 3 myr ) , relatively compact cluster ic 348 has proven to be a valuable laboratory for studying young stellar object variability @xcite . with over 300 cluster members , only one of which is earlier than a0 , this region of low mass star formation contains a wide variety of c... | variability in the infrared emission from disks around pre - main sequence stars over the course of days to weeks appears to be common , but the physical cause of the changes in disk structure are not constrained . we obtained ten epochs of chandra acis photometry over a period of 30 days with a roughly 3 day cadence c... | variability in the infrared emission from disks around pre - main sequence stars over the course of days to weeks appears to be common , but the physical cause of the changes in disk structure are not constrained . here we present coordinated monitoring of one young cluster with the _ spitzer _ and _ chandra _ space te... |
1407.4985 | c | we find no evidence for an increased frequency of infrared variability among stars with x - ray variability . we see no correlation in the shape of the light curves in stars that exhibit variability in both bands , which is especially true in the stars with moderate x - ray flares for which we see no evidence for a cha... | there is no significant correlation between the shape of the infrared and x - ray light curves , or between the size of the x - ray and infrared variability . among the stars with an x - ray flare none showed evidence of a correlated change in the infrared photometry on timescales of days to weeks following the flare . | variability in the infrared emission from disks around pre - main sequence stars over the course of days to weeks appears to be common , but the physical cause of the changes in disk structure are not constrained . here we present coordinated monitoring of one young cluster with the _ spitzer _ and _ chandra _ space te... |
gr-qc0205062 | i | one of the best promising methods of searching for a planetary systems around nearby stars is the high accuracy astrometric observations . sim is being designed to produce wealth of the astrometric data necessary to address exactly this problem . it is clear that the corresponding astrometric signal due to a reflex mot... | we address the issue of relativistic stellar aberration requirements for the space interferometry mission ( sim ) . motivated by the importance of this issue for sim , we have considered a problem of relative astrometric observations of two stars separated by angle on the sky with a single baseline interferometer . whi... | we address the issue of relativistic stellar aberration requirements for the space interferometry mission ( sim ) . motivated by the importance of this issue for sim , we have considered a problem of relative astrometric observations of two stars separated by angle on the sky with a single baseline interferometer . whi... |
cond-mat0204303 | i | in two dimensions , the dynamical equation ( [ sca ] ) for the mass profile reads @xmath330 after the change of variable @xmath331 has been effected . looking for a stationary solution , and using @xmath332 , eq . ( [ dyn2d ] ) is readily integrated leading to @xmath333 note that @xmath334 , ensuring that the whole mas... | finally , we solve the problem in , which displays rather rich and peculiar features . laboratoire de physique quantique ( umr 5626 du cnrs ) , universit paul sabatier , + 118 , route de narbonne , 31062 toulouse , france + e - mail : _clement.sire@irsamc.ups-tlse.fr & chavanis@irsamc.ups-tlse.fr_ | we address the thermodynamics ( equilibrium density profiles , phase diagram , instability analysis ... ) and the collapse of a self - gravitating gas of brownian particles in dimensions , in both canonical and microcanonical ensembles . in the canonical ensemble , we derive the analytic form of the density scaling pro... |
cond-mat0204303 | c | in this paper , we have studied the boltzmann - poisson equation and the smoluchowski - poisson system in various dimensions of space . our study shows in particular how the nature of the problem changes as we pass from @xmath17 to @xmath7 . we showed that the dimension @xmath7 is critical in the sense that the results... | we address the thermodynamics ( equilibrium density profiles , phase diagram , instability analysis ... ) and the collapse of a self - gravitating gas of brownian particles in dimensions , in both canonical and microcanonical ensembles . in the canonical ensemble , we derive the analytic form of the density scaling pro... | we address the thermodynamics ( equilibrium density profiles , phase diagram , instability analysis ... ) and the collapse of a self - gravitating gas of brownian particles in dimensions , in both canonical and microcanonical ensembles . in the canonical ensemble , we derive the analytic form of the density scaling pro... |
0807.3653 | i | since the discovery of ultra - luminous infrared galaxies ( ulirgs , l@xmath3@xmath410@xmath5 ) by the _ infrared astronomical satellite _ ( _ iras _ ) in the 1980 s ( e.g. , * ? ? ? * ) , it is widely accepted that ulirgs result from strong interactions / mergers between gas - rich disk galaxies . these mergers form e... | we analyse mid - infrared ( mir ) spectroscopic properties for 19 ultra - luminous infrared quasars ( ir qsos ) in the local universe based on the spectra from the infrared spectrograph on board the _ spitzer space telescope_. the mir properties of ir qsos are compared with those of optically - selected palomar - gre... | we analyse mid - infrared ( mir ) spectroscopic properties for 19 ultra - luminous infrared quasars ( ir qsos ) in the local universe based on the spectra from the infrared spectrograph on board the _ spitzer space telescope_. the mir properties of ir qsos are compared with those of optically - selected palomar - gre... |
0807.3653 | c | by comparing the mir spectroscopic properties of ir qsos , ulirgs and pg qsos , we found that the indicators of relative contributions of starbursts to agns ( such as colour index @xmath2(30 , 15 ) and ew [ pah 6.2@xmath1 m ] ) for ir qsos are between those of ulirgs and pg qsos . these results are consistent with th... | these results are consistent with ir qsos being at a transitional stage from ulirgs to classical qsos . correlations between the [ neii ] 12.81 m and pah 6.2 m luminosities and those between the [ neii ] , pah with 60 m luminosities for ulirgs and ir qsos indicate that both [ neii ] and pah luminosities are approxima... | we analyse mid - infrared ( mir ) spectroscopic properties for 19 ultra - luminous infrared quasars ( ir qsos ) in the local universe based on the spectra from the infrared spectrograph on board the _ spitzer space telescope_. the mir properties of ir qsos are compared with those of optically - selected palomar - gre... |
0807.3653 | i | in this work , we studied the mir spectral properties of low - redshift ir qsos based on spectroscopic observations with _ spitzer _ irs , and compared their properties with those of ulirgs and optically - selected pg qsos . the following are our main results : \1 . the average mir spectra , mir spectral slopes , ... | the average mir spectral features from to 30 m , including the spectral slopes , 6.2 m pah emission strengths and [ neii ] 12.81 m luminosities of ir qsos , differ from those of pg qsos . in contrast , ir qsos and ulirgs have comparable pah and [ neii ] luminosities . we also find that the colour index(30 , 15 ) is ... | we analyse mid - infrared ( mir ) spectroscopic properties for 19 ultra - luminous infrared quasars ( ir qsos ) in the local universe based on the spectra from the infrared spectrograph on board the _ spitzer space telescope_. the mir properties of ir qsos are compared with those of optically - selected palomar - gre... |
0910.3133 | i | ever since the work of lennard - jones @xcite has the interaction between atoms and surfaces been of interest in many fields of physics , chemistry and technology . the seminal work by casimir and polder @xcite demonstrated that the shift in atomic energy levels close to a conductor is a probe for the quantum fluctuati... | we analyze the magnetic dipole contribution to atom - surface dispersion forces . we use thermal response theory for the surface material and discuss both normal metals and superconductors . the asymptotes of the free energy of interaction and of the entropy are calculated analytically over a large range of distances .... | we analyze the magnetic dipole contribution to atom - surface dispersion forces . unlike its electrical counterpart , it involves small transition frequencies that are comparable to thermal energy scales . a significant temperature dependence is found near surfaces with a nonzero dc conductivity , leading to a strong s... |
1109.2680 | i | the consequences of deforming the canonical commutation relation between the position and momentum operators to @xmath9 \;=\ ; i\hbar ( 1 + \beta \hat{p}^2 ) \label{commutationrelation}\ ] ] have been studied in various contexts by many authors @xcite . the main motivation behind this was to use such deformed quantum... | we analyze the position and momentum uncertainties of the energy eigenstates of the harmonic oscillator in the context of a deformed quantum mechanics , namely , that in which the commutator between the position and momentum operators is given by=i\hbar(1+\beta \hat{p}^2)$ ] . this deformed commutation relation leads t... | we analyze the position and momentum uncertainties of the energy eigenstates of the harmonic oscillator in the context of a deformed quantum mechanics , namely , that in which the commutator between the position and momentum operators is given by=i\hbar(1+\beta \hat{p}^2)$ ] . this deformed commutation relation leads t... |
hep-th0401069 | i | we have studied in detail the quantum process in which a cosmic string breaks in an anti - de sitter ( ads ) background and a pair of black holes is created at the ends of the string . the energy to materialize and accelerate the black holes comes from the strings tension . the analysis of this process in a flat backgr... | we analyze the quantum process in which a cosmic string breaks in an anti - de sitter ( ads ) background , and a pair of charged or neutral black holes is produced at the ends of the strings . the energy to materialize and accelerate the pair comes from the strings tension . in an ads background the acceleration of the... | we analyze the quantum process in which a cosmic string breaks in an anti - de sitter ( ads ) background , and a pair of charged or neutral black holes is produced at the ends of the strings . the energy to materialize and accelerate the pair comes from the strings tension . in an ads background this is the only study ... |
astro-ph0505092 | c | we studied the orientation of all pne of our sample ( without separating it in regions ) and we do not see a clear preferential orientation of long axis of pn respect to the galactic plane . this distribution of gpa is similar to that observed by cam98 . we tried to double check our results by applying our analysis to ... | we analyze the spatial orientation of a homogenous sample of 440 elongated planetary nebulae ( pne ) in order to determine the orientation of their apparent major axis respect to the milky way plane . the global distribution of galactic position angles ( gpa ) of pne is quantitatively not very different from a random d... | we analyze the spatial orientation of a homogenous sample of 440 elongated planetary nebulae ( pne ) in order to determine the orientation of their apparent major axis respect to the milky way plane . we present some important geometrical and statistical considerations that have been overlooked by the previous works on... |
1206.6116 | i | the high redshift frontier has moved to @xmath11 as a result of the high resolution near - infrared ( nir ) images from the _ hubble space telescope _ ( _ hst _ ) wide field camera 3 ( wfc3 ) , and the lyman break ` dropout ' technique . the lyman break technique was first applied to select lyman break galaxies ( lbgs ... | we analyze the spectral energy distributions ( seds ) of lyman break galaxies ( lbgs ) at selected using the _ hubble space telescope _ ( _ hst _ ) wide field camera 3 ( wfc3 ) uvis channel filters . these _ hst_/wfc3 observations cover about 50 arcmin in the goods - south field as a part of the wfc3 early release sc... | we analyze the spectral energy distributions ( seds ) of lyman break galaxies ( lbgs ) at selected using the _ hubble space telescope _ ( _ hst _ ) wide field camera 3 ( wfc3 ) uvis channel filters . these _ hst_/wfc3 observations cover about 50 arcmin in the goods - south field as a part of the wfc3 early release sc... |
1206.6116 | i | in this paper , we investigated stellar populations of lbgs at @xmath0@xmath1 selected using _ hst_/wfc3 uvis filters in the goods - s field . we used deep multi - wavelength observations from the _ hst _ , vlt , and _ spitzer _ to compare observed seds with the spectral synthesis models to infer physical properties (... | the deep multi - band photometry in this field is used to identify best - fit sed models , from which we infer the following results : ( 1 ) the photometric redshift estimate of these dropout selected lbgs is accurate to within few percent ; ( 2 ) the uv spectral slope is redder than at high redshift ( ) , where lbgs a... | we analyze the spectral energy distributions ( seds ) of lyman break galaxies ( lbgs ) at selected using the _ hubble space telescope _ ( _ hst _ ) wide field camera 3 ( wfc3 ) uvis channel filters . these _ hst_/wfc3 observations cover about 50 arcmin in the goods - south field as a part of the wfc3 early release sc... |
cond-mat0502405 | r | in the following we shall use reduced quantities : @xmath115 as reduced temperature , @xmath116 as reduced total density , @xmath117 as the concentration of species @xmath22 , @xmath118 as reduced pressure , @xmath119 as the reduced chemical potential of species @xmath22 , and @xmath120 as the reduced dipole moments . ... | we apply a modified mean - field density functional theory to determine the phase behavior of binary mixtures of stockmayer fluids whose spherical constituents interact according to lennard - jones ( lj ) pair potentials with embedded pointlike dipole moments . on the basis of systematic numerical calculations we const... | we apply a modified mean - field density functional theory to determine the phase behavior of binary mixtures of stockmayer fluids whose spherical constituents interact according to lennard - jones ( lj ) pair potentials with embedded pointlike dipole moments . on the basis of systematic numerical calculations we const... |
hep-ph0612290 | i | the variety of accessible final states in @xmath12 decays to two mesons provides an abundant source of information on cp violation and flavour - changing processes . when the final state consists of two vector mesons , an angular analysis of the vector mesons decay products also provides insight into the spin structure... | large longitudinal polarisation is expected with certainty only for a few tree - dominated colour - allowed modes , which receive small penguin and spectator - scattering contributions . this allows for an accurate determination of the ckm angle ( or ) from resulting in we also emphasize that the system is ideal for an... | we calculate the hard - scattering kernels relevant to the negative - helicity decay amplitude in decays to two vector mesons in the framework of qcd factorisation . we then perform a comprehensive analysis of the 34 decays , including decays and the complete set of polarisation observables . we find considerable uncer... |
1409.0497 | i | baryons containing heavy quarks are interesting both from the theoretical and experimental points of view . because the bottom and charm quark masses are greater than the intrinsic energy scale of qcd , approximate heavy - quark flavor and spin symmetries constrain the spectrum and dynamics of heavy baryons @xcite . si... | we consider all possible combinations of charm and bottom quarks , and compute a total of 36 different states with and . we use domain - wall fermions for the up , down , and strange quarks , a relativistic heavy - quark action for the charm quarks , and nonrelativistic qcd for the bottom quarks . our analysis includes... | we calculate the masses of baryons containing one , two , or three heavy quarks using lattice qcd . we consider all possible combinations of charm and bottom quarks , and compute a total of 36 different states with and . we use domain - wall fermions for the up , down , and strange quarks , a relativistic heavy - quark... |
hep-ph0405232 | i | we calculated the dominant two - loop electroweak correction , of @xmath0 , to the partial width of the decay into two photons of the sm higgs boson in the intermediate mass range , @xmath3 , where this process is of great phenomenological relevance for the searches at hadron colliders of this elusive missing link of t... | we compute the dominant two - loop electroweak correction , of , to the partial width of the decay of an intermediate - mass higgs boson into a pair of photons . this correction reduces the born result by approximately 2.5% . as a by - product of our analysis , we also recover the correction to the partial width of the... | we compute the dominant two - loop electroweak correction , of , to the partial width of the decay of an intermediate - mass higgs boson into a pair of photons . we use the asymptotic - expansion technique in order to extract the leading dependence on the top - quark mass plus four expansion terms that describe the dep... |
1504.00317 | i | understanding the production mechanism of low-@xmath0 quarkonia in nucleon - nucleon collisions is of fundamental importance to properly use them as probes of deconfinement or collectivity in heavy ion collisions . indeed , most of the analysis of quarkonium production in nucleus - nucleus collisions are carried out on... | we compute the energy dependence of the-integrated cross section of directly produced quarkonia in collisions at next - to - leading order ( nlo ) , namely up to , within nonrelativistic qcd ( nrqcd ) . our analysis is based on the idea that the-_integrated _ and the-_differential _ cross sections can be treated as two... | we compute the energy dependence of the-integrated cross section of directly produced quarkonia in collisions at next - to - leading order ( nlo ) , namely up to , within nonrelativistic qcd ( nrqcd ) . our analysis is based on the idea that the-_integrated _ and the-_differential _ cross sections can be treated as two... |
1610.00560 | i | networks of processor - sharing queues with state - dependent service rates have been extensively used to model a large variety of communication and computation systems like content delivery systems @xcite , computer clusters @xcite and data networks @xcite . they are natural models for such systems as they capture the... | this in turn allows us to derive stochastic bounds for a larger class of networks which satisfy less restrictive symmetry assumptions . these results are applied to practical examples of tree data networks and computer clusters . + * keyworkds : * processor - sharing networks , performance , balanced fairness , poly - ... | we consider a network of processor - sharing queues with state - dependent service rates . these are allocated according to balanced fairness within a polymatroid capacity set . balanced fairness is known to be both insensitive and pareto - efficient in such networks , which ensures that the performance metrics , when ... |
1108.5490 | i | it was the invention of quantum error correcting codes @xcite ( qeccs ) that opened quantum computing ( qc ) as a theoretical possibility . however , high precision required for error correction @xcite combined with the large number of auxiliary qubits necessary to implement it , have so far inhibited any practical rea... | we consider design of the quantum stabilizer codes via a two - step , low - complexity approach based on the framework of codeword - stabilized ( cws ) codes . in this framework we also consider additive cyclic cws codes and show that these codes correspond to a previously unexplored class of single - generator cyclic ... | we consider design of the quantum stabilizer codes via a two - step , low - complexity approach based on the framework of codeword - stabilized ( cws ) codes . in this framework , each quantum cws code can be specified by a graph and a binary code . for codes that can be obtained from a given graph , we give several up... |
0801.2413 | i | in simple deterministic dynamical systems physical quantities like transport coefficients can be fractal functions of control parameters . this finding was first reported for a one - dimensional piecewise linear map lifted periodically onto the whole real line , for which the diffusion coefficient was computed by using... | we consider families of dynamics that can be described in terms of perron - frobenius operators with exponential mixing properties . for piecewise expanding interval maps we rigorously prove continuity properties of the drift and of the diffusion coefficient under parameter variation . our main result is that has a mo... | we consider families of dynamics that can be described in terms of perron - frobenius operators with exponential mixing properties . for piecewise expanding interval maps we rigorously prove continuity properties of the drift and of the diffusion coefficient under parameter variation . our main result is that has a mo... |
1103.4143 | i | detailed cosmological observations made during the last decade ( see @xcite for some of the latest results ) have made it clear that the minimal cosmological model ( scdm ) based on the cosmological principle ( homogeneity , isotropy , validity of general relativity ) and with a purely radiation and matter content ( b... | we consider on - center and off - center observers in an inhomogeneous , spherically symmetric , isocurvature ( flat ) concentration of dark energy with typical size of a few gpc . such a concentration could be produced e.g. by a recently formed global monopole with core size that approaches the hubble scale . in this ... | we consider on - center and off - center observers in an inhomogeneous , spherically symmetric , isocurvature ( flat ) concentration of dark energy with typical size of a few gpc . such a concentration could be produced e.g. by a recently formed global monopole with core size that approaches the hubble scale . in this ... |
1203.6206 | i | we consider in this work a cauchy problem for the following reaction - diffusion equation in one space dimension : @xmath0 supplemented with the initial condition @xmath1 here the function @xmath2 satisfies the periodicity condition @xmath3 for some @xmath4 . we will assume , throughout this paper , that there exists a... | we consider one - dimensional reaction - diffusion equations for a large class of spatially periodic nonlinearities including multistable ones and study the asymptotic behavior of solutions with heaviside type initial data . our analysis reveals some new dynamics where the profile of the propagation is not characteri... | we consider one - dimensional reaction - diffusion equations for a large class of spatially periodic nonlinearities including multistable ones and study the asymptotic behavior of solutions with heaviside type initial data . our analysis reveals some new dynamics where the profile of the propagation is not characteri... |
0912.1233 | i | the focusing nonlinear schrdinger equation ( nls ) @xmath2 where @xmath3 , and @xmath4 is the laplacian , has been the subject of intense study , due to its role in various areas of physics , such as nonlinear optics and bose - einstein condensates ( bec ) . it is well - known that the nls possesses solutions that ... | we consider singular solutions of the biharmonic nls . in the-critical case , the blowup rate is bounded by a quartic - root power law , the solution approaches a self - similar profile , and a finite amount of-norm , which is no less than the critical power , concentrates into the singularity ( `` strong collapse '' )... | we consider singular solutions of the biharmonic nls . in the-critical case , the blowup rate is bounded by a quartic - root power law , the solution approaches a self - similar profile , and a finite amount of-norm , which is no less than the critical power , concentrates into the singularity ( `` strong collapse '' )... |
0905.0048 | i | closed 2-manifolds embedded locally flatly in the euclidean 4-space @xmath1 or the 4-sphere @xmath2 are called _ surface links_. it is known that any oriented surface link can be described in a form of the closure of a simple surface braid , i.e. in a braid form over the standard 2-sphere ( cf . @xcite ) . as surface k... | we consider surface links in the 4-space or the 4-sphere which can be described in braid forms over the standard torus , which we call torus - covering - links . torus - covering - links include spun-knots , turned spun-knots , symmetry - spun tori and torus-knots . in this paper | we consider surface links in the 4-space or the 4-sphere which can be described in braid forms over the standard torus , which we call torus - covering - links . torus - covering - links include spun-knots , turned spun-knots , symmetry - spun tori and torus-knots . in this paper we give examples of interesting torus -... |
astro-ph0003028 | i | the existence of disks around young stars was spectacularly confirmed by direct images from the _ hubble space telescope _ ( _ hst _ ) ( mccaughrean & odell 1996 ; burrows et al . observations suggest that young stars are usually found in binary systems and that young binaries typically interact strongly with the disk... | our aim is to determine whether , if the disk is initially tilted with respect to the plane of the binary orbit , the inclination of the system will increase or decrease with time . the problem is conveniently formulated in the binary frame in which the tidal potential of the companion star is static . we may then cons... | we consider the dynamics of a protostellar disk surrounding a star in a circular - orbit binary system . our aim is to determine whether , if the disk is initially tilted with respect to the plane of the binary orbit , the inclination of the system will increase or decrease with time . the problem is conveniently formu... |
astro-ph0003028 | r | equations ( [ ell_x])([g_y ] ) are solved numerically using the complex variables defined in equations ( [ tilde_ell_x])([tilde_g_y ] ) . when solving the odes for a normal mode , it is advisable to integrate away from the singular points at the edges of the disk . we apply the arbitrary normalization condition @xmath1... | however , the effect of the component is enhanced in the vicinity of resonances where the outer radius of the disk is such that the natural frequency of a global bending mode of the disk is equal to twice the binary orbital frequency . under such circumstances , the outer radius corresponding to the primary resonance i... | we consider the dynamics of a protostellar disk surrounding a star in a circular - orbit binary system . our aim is to determine whether , if the disk is initially tilted with respect to the plane of the binary orbit , the inclination of the system will increase or decrease with time . the problem is conveniently formu... |
astro-ph0003028 | i | in this paper , we have considered the linear stability of a coplanar protostellar disk that surrounds a star in a circular - orbit binary system . we have determined whether a slight tilt introduced into the disk would grow or decay in time . the outcome depends on the size of the disk . for disks that are truncated b... | we consider the dynamics of a protostellar disk surrounding a star in a circular - orbit binary system . the component causes alignment of the system , while the component has the opposite tendency . we discuss these results in the light of recent observations of protostellar disks in binary systems . | we consider the dynamics of a protostellar disk surrounding a star in a circular - orbit binary system . our aim is to determine whether , if the disk is initially tilted with respect to the plane of the binary orbit , the inclination of the system will increase or decrease with time . the problem is conveniently formu... |
1005.1862 | c | we have shown theoretically and via simulation studies that : * the _ limiting spectral distribution _ ( lsd ) of rcv matrix depends not only on that of the icv matrix , but also on the time - variability of covolatility process ; * in particular , even with the same targeting icv matrix , the _ empirical spectral d... | we consider the estimation of integrated covariance ( icv ) matrices of high dimensional diffusion processes based on high frequency observations . we start by studying the most commonly used estimator , the _ realized covariance _ ( rcv ) matrix . we show that in the high dimensional case when the dimension and the ob... | we consider the estimation of integrated covariance ( icv ) matrices of high dimensional diffusion processes based on high frequency observations . we start by studying the most commonly used estimator , the _ realized covariance _ ( rcv ) matrix . we show that in the high dimensional case when the dimension and the ob... |
1303.3776 | i | we consider the problem of factorization of permutations . we begin with a discussion of some simple mathematical ideas behind a matching game known as amidakuji concerning the assignment of @xmath0 jobs to @xmath0 people . it is shown that the ideas are related to the study of other topics including sorting algorithms... | we consider the problem of factorization of permutations . we begin with a discussion of some simple mathematical ideas behind a matching game known as amidakuji concerning the assignment of jobs to people . it is shown that the ideas are related to the study of other topics including sorting algorithms in computer sci... | we consider the problem of factorization of permutations . we begin with a discussion of some simple mathematical ideas behind a matching game known as amidakuji concerning the assignment of jobs to people . it is shown that the ideas are related to the study of other topics including sorting algorithms in computer sci... |
1512.06552 | i | coupled cluster ( cc ) theory @xcite is perhaps the most powerful method for describing dynamical electron correlation effects within the realm of modern quantum chemistry . the cc singles and doubles ( ccsd ) model @xcite , in which the cluster operator is truncated at the level of double excitations , is a robust a... | we consider two distinct coupled cluster ( cc ) perturbation series that both expand the difference between the energies of the ccsd ( cc with single and double excitations ) and ccsdt ( cc with single , double , and triple excitations ) models in orders of the mller - plesset fluctuation potential . we initially intro... | we consider two distinct coupled cluster ( cc ) perturbation series that both expand the difference between the energies of the ccsd ( cc with single and double excitations ) and ccsdt ( cc with single , double , and triple excitations ) models in orders of the mller - plesset fluctuation potential . we initially intro... |
1103.2484 | i | for every map @xmath0 of connected reductive groups over @xmath1 we may regard the representations of @xmath2 as representations of @xmath3 via its action through @xmath4 for any irreducible representation @xmath5 of @xmath2 there is a direct sum decomposition into irreducible @xmath3 representations . @xmath6 the v... | we construct polyhedral families of valuations on the branching algebra of a morphism of reductive groups . this establishes a connection between the combinatorial rules for studying a branching problem and the tropical geometry of the branching algebra . in the special case when the branching problem comes from the in... | we construct polyhedral families of valuations on the branching algebra of a morphism of reductive groups . this establishes a connection between the combinatorial rules for studying a branching problem and the tropical geometry of the branching algebra . in the special case when the branching problem comes from the in... |
hep-ph0005281 | i | the parity - violating ( pv ) nucleon - nucleon interaction has been a subject of interest in nuclear and particle physics for some time . to date , pv observables generated by this interaction remain the only experimental windows on the @xmath11 , nonleptonic weak interaction . since the 1970 s , the pv nn interaction... | we construct the complete parity - violating ( pv ) interaction lagrangian with one derivative , and calculate the chiral corrections to the pv yukawa coupling constant through in the leading order of heavy baryon expansion . we discuss the relationship between the renormalized , the measured value of , and the corresp... | we construct the complete parity - violating ( pv ) interaction lagrangian with one derivative , and calculate the chiral corrections to the pv yukawa coupling constant through in the leading order of heavy baryon expansion . we discuss the relationship between the renormalized , the measured value of , and the corresp... |
1212.2077 | i | the solidification of a liquid or the melting of a solid lead to complex free boundary problems involving many different physical effects . for example , latent heat is set free at the interface and a competition between surface energy and diffusion leads to instabilities like the mullins sekerka instability . the res... | = 1 phase field models , parametric sharp interface methods , stefan problem , anisotropy , solidification , crystal growth , numerical simulations , benchmark problems 35k55 , 35r35 , 35r37 , 53c44 , 65m12 , 65m50 , 65m60 , 74e10 , 74e15 , 74n20 , 80a22 , 82c26 | we critically compare the practicality and accuracy of numerical approximations of phase field models and sharp interface models of solidification . particular emphasis is put on stefan problems , and their quasi - static variants , with applications to crystal growth . new approaches with a high mesh quality for the p... |
1210.6292 | i | a _ clustering method _ is an algorithm that takes as input a finite space with a distance function ( typically , a finite metric space ) @xmath3 and gives as output a partition of @xmath4 . kleinberg discussed in @xcite the problem of clustering in an axiomatic way and proposed a few basic properties that a clustering... | we define a hierarchical clustering method :-unchaining single linkage or . the input of this algorithm is a finite metric space and a certain parameter . this method is sensitive to the density of the distribution and offers some solution to the so called chaining effect . we also define a modified version , , to trea... | we define a hierarchical clustering method :-unchaining single linkage or . the input of this algorithm is a finite metric space and a certain parameter . this method is sensitive to the density of the distribution and offers some solution to the so called chaining effect . we also define a modified version , , to trea... |
1508.04694 | i | microscale and nanoscale solid state heat transfer as mediated by phonon transport has received considerable attention in connection with a number of diverse practical applications , such as heat management in microelectronic devices , passive cooling and thermoelectric energy conversion @xcite , but also due to the nu... | we derive the continuum equations and boundary conditions governing phonon - mediated heat transfer in the limit of small but finite mean free path from asymptotic solution of the linearized boltzmann equation in the relaxation time approximation . our approach uses the ratio of the mean free path to the characteristic... | we derive the continuum equations and boundary conditions governing phonon - mediated heat transfer in the limit of small but finite mean free path from asymptotic solution of the linearized boltzmann equation in the relaxation time approximation . our approach uses the ratio of the mean free path to the characteristic... |
1505.04247 | i | there are many methods for determining an asteroid position during observations with a ccd camera . for example , the full width at half magnitude ( fwhm ) approach @xcite , which is based on the analytical description of the object images on the ccd frame , as well as other methods , in which the position of an object... | we describe a new iteration method to estimate asteroid coordinates , which is based on the subpixel gaussian model of a discrete object image . is known a priori , while the associated parameters are determined from a real digital object image . since 2010 , the method was tested as the basis of our colitec ( collecti... | we describe a new iteration method to estimate asteroid coordinates , which is based on the subpixel gaussian model of a discrete object image . the method operates by continuous parameters ( asteroid coordinates ) in a discrete observational space ( the set of pixels potential ) of the ccd frame . in this model , a ki... |
1505.04247 | c | a new iteration method of asteroid coordinate estimation on the digital image has been developed . the method operates by continuous parameters ( asteroid coordinates ) in a discrete observation space ( the set of pixels potential of the ccd matrix ) . high rates of the colitec program during 2011 - 2012 as concerns wi... | the method operates by continuous parameters ( asteroid coordinates ) in a discrete observational space ( the set of pixels potential ) of the ccd frame . in this model , a kind of the coordinate distribution of the photons hitting a pixel of the ccd frame the developed method , being more flexible in adapting to any f... | we describe a new iteration method to estimate asteroid coordinates , which is based on the subpixel gaussian model of a discrete object image . the method operates by continuous parameters ( asteroid coordinates ) in a discrete observational space ( the set of pixels potential ) of the ccd frame . in this model , a ki... |
math0701591 | i | this paper deals with various notions originating from the theory of tight closure , which we now review briefly . let @xmath0 be a commutative ring of prime characteristic @xmath1 ; for each ideal @xmath2 we define the _ @xmath3 frobenius power _ of @xmath4 , denoted @xmath5}$ ] , to be the ideal of @xmath0 generated ... | we describe an algorithm for computing parameter - test - ideals in certain local cohen - macaulay rings . the algorithm is based on the study of a frobenius map on the injective hull of the residue field of the ring and on the application of rodney sharp s notion of `` special ideals '' . our techniques also provid... | we describe an algorithm for computing parameter - test - ideals in certain local cohen - macaulay rings . the algorithm is based on the study of a frobenius map on the injective hull of the residue field of the ring and on the application of rodney sharp s notion of `` special ideals '' . our techniques also provid... |
1201.0783 | i | understanding the evolution of galaxies and large scale structure remains a fundamental challenge in astrophysics . many ambitious galaxy surveys have been carried out to address this problem , but limited time on large telescopes results in a classic problem : sky coverage , depth , and spectral resolution choose two... | we describe the carnegie - spitzer - imacs ( csi ) survey , a wide - field , near - ir selected spectrophotometric redshift survey with the inamori magellan areal camera and spectrograph ( imacs ) on magellan - baade . by defining a flux - limited sample of galaxies in spitzer _ irac _ m imaging of swire fields , the c... | we describe the carnegie - spitzer - imacs ( csi ) survey , a wide - field , near - ir selected spectrophotometric redshift survey with the inamori magellan areal camera and spectrograph ( imacs ) on magellan - baade . by defining a flux - limited sample of galaxies in spitzer _ irac _ m imaging of swire fields , the c... |
astro-ph0605355 | i | in recent years , great advances in our understanding of the nature and evolution of high redshift galaxies have been made , thanks to the availability of large samples . the techniques that have been developed rely either on colour selection criteria ( e.g. steidel et al . 2003 , 2004 , franx et al . 2003 , daddi et a... | we describe the spectral energy distributions ( seds ) of lyman break galaxies ( lbgs ) at z using deep mid - infrared and optical observations of the extended groth strip , obtained with irac and mips on board spitzer and from the ground , respectively . we focus on lbgs with detections at all four irac bands , in par... | we describe the spectral energy distributions ( seds ) of lyman break galaxies ( lbgs ) at z using deep mid - infrared and optical observations of the extended groth strip , obtained with irac and mips on board spitzer and from the ground , respectively . we focus on lbgs with detections at all four irac bands , in par... |
1102.4355 | i | the goal of this paper is to describe composition - closed equational classes of boolean functions not necessarily containing projections , thereby generalizing post s description of boolean clones . first we recall the definition of a clone , and then we give an informal overview of the problem that we consider . for ... | we determine all composition - closed equational classes of boolean functions . these classes provide a natural generalization of clones and iterative algebras : they are closed under composition , permutation and identification ( diagonalization ) of variables and under introduction of inessential variables ( cylindri... | we determine all composition - closed equational classes of boolean functions . these classes provide a natural generalization of clones and iterative algebras : they are closed under composition , permutation and identification ( diagonalization ) of variables and under introduction of inessential variables ( cylindri... |
math0306189 | i | a problem of considerable interest in both mathematics and physics is to determine the asymptotics of the distribution functions @xmath0 of an orthonormal basis @xmath1 of eigenfunctions of a laplacian ( or similar hamiltonian ) on a compact manifold ( see @xcite ) . in general , it is hopelessly difficult to obtain mo... | we determine the asymptotics of the joint eigenfunctions of the torus action on a toric khler variety . such varieties are models of completely integrable systems in complex geometry . we first determine the pointwise asymptotics of the eigenfunctions , which show that they behave like gaussians centered at the corresp... | we determine the asymptotics of the joint eigenfunctions of the torus action on a toric khler variety . such varieties are models of completely integrable systems in complex geometry . we first determine the pointwise asymptotics of the eigenfunctions , which show that they behave like gaussians centered at the corresp... |
0904.1416 | i | fermion masses are one of the least understood parts of the standard model ( sm ) . even the charged fermion masses span over five orders of magnitude from the top quark to the electron , begging for a theoretical explanation . the majority of these masses and mixing angles are precisely constrained by experiment . sti... | these decays are important in scenarios in which the lightest supersymmetric particle is the gravitino , a generic possibility in models with gauge- and gravity - mediated supersymmetry breaking . three - body decays have been discussed previously assuming flavor conservation and left - right mixing in only the stau se... | we determine the widths of three - body decays of sleptons , , in the presence of arbitrary slepton flavor violation and left - right mixing . these decays are important in scenarios in which the lightest supersymmetric particle is the gravitino , a generic possibility in models with gauge- and gravity - mediated super... |
1701.01847 | c | to conclude , we have developed a theory for the relaxation of optically pumped two - level systems coupled to a bosonic bath using the nonequilibrium keldysh technique and the diagrammatic perturbation theory . to elucidate the effects of bath phase transition , we have considered the cases when the bosonic bath is in... | we develop a microscopic theory for the relaxation dynamics of an optically pumped two - level system ( tls ) coupled to a bath of weakly interacting bose gas . using keldysh formalism and diagrammatic perturbation theory , expressions for the relaxation times of the tls rabi oscillations are derived when the boson bat... | we develop a microscopic theory for the relaxation dynamics of an optically pumped two - level system ( tls ) coupled to a bath of weakly interacting bose gas . using keldysh formalism and diagrammatic perturbation theory , expressions for the relaxation times of the tls rabi oscillations are derived when the boson bat... |
nucl-th0302040 | i | the lowest order in the interaction mean - field treatments of the nuclear pairing in bulk nuclear matter and in finite nuclei are conceptually simple and have been reasonably consistent with the phenomenology of these systems . the hartree - fock - bogolyubov ( hfb ) theory with zero- or finite - range ( e.g. , the sk... | the model is applied to the low - density neutron matter in neutron star crusts by separating the interaction into a long - range one - pion - exchange component and a short - range component parametrized in terms of landau fermi liquid parameters . the resulting eliashberg - type coupled nonlinear integral equations a... | we develop a model of off - mass - shell pairing correlations in nuclear systems , which is based on the meson - exchange picture of nuclear interactions . the temporal retardations in the model are generated by the fock exchange diagrams . the kernel of the complex gap equation for baryons is related to the in - mediu... |
1508.04664 | i | up until fairly recently , most authors working with steady water waves have made the assumption that the vorticity @xmath0 of the velocity field @xmath1 vanishes identically . such waves are known as irrotational , as opposed to rotational waves where @xmath2 is allowed to be nonzero . rotational waves can exhibit mor... | we establish the existence of small - amplitude uni- and bimodal steady periodic gravity waves with an affine vorticity distribution . an important part of the analysis is a fairly complete description of the small - amplitude solutions . finally , we investigate the asymptotic behavior of solutions on the local bifurc... | we establish the existence of small - amplitude uni- and bimodal steady periodic gravity waves with an affine vorticity distribution . the solutions describe waves with critical layers and an arbitrary number of crests and troughs in each minimal period . our bifurcation argument differs slightly from earlier theory , ... |
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