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0803.2754 | i | an immersion @xmath6 is _ conformally flat _ if there exists a flat metric in the conformal class of the induced metric @xmath7 : that is there exists a smooth function @xmath8 such that @xmath9 is flat . this condition is equivalent to the weyl tensor of @xmath10 being zero when @xmath11 , and to the schouten tensor @... | . cartan proved that conformally flat hypersurfaces in for have at most two distinct principal curvatures and locally envelop a one - parameter family of-spheres . we prove that the gauss - codazzi equation for conformally flat hypersurfaces in is a soliton equation , and use a dressing action from soliton theory to c... | . cartan proved that conformally flat hypersurfaces in for have at most two distinct principal curvatures and locally envelop a one - parameter family of-spheres . we prove that the gauss - codazzi equation for conformally flat hypersurfaces in is a soliton equation , and use a dressing action from soliton theory to c... |
0907.0529 | i | the @xmath0 expansion of qcd @xcite is a valuable tool for studying the nonperturbative dynamics of the strong interactions @xcite . in the limit @xmath2 , the baryon sector of qcd has an exact _ contracted _ @xmath3 spin - flavor - symmetry @xcite . for finite @xmath4 , the contracted spin - flavor - symmetry is br... | baryon mass relations are compared with lattice simulations of baryon masses using different values of the light - quark masses , and hence different values of flavor - symmetry breaking . the validity of baryon mass relations derived without assuming approximate flavor - symmetry also can be tested by lattice data at... | baryon mass relations are compared with lattice simulations of baryon masses using different values of the light - quark masses , and hence different values of flavor - symmetry breaking . the lattice data clearly display both the and flavor - symmetry breaking hierarchies . the validity of baryon mass relations deriv... |
1404.1238 | i | this paper considers joint estimation of multiple directed acyclic graph ( dag ) models using integer linear programming ( ilp ) . graphical models are multivariate models in which vertices in a graph @xmath0 represent random variables with edges between the vertices describing conditional independence statements conce... | * abstract . * this paper considers the problem of estimating the structure of multiple related directed acyclic graph ( dag ) models . . results are presented on both simulated data and fmri data obtained from multiple subjects . * keywords . * hierarchical models , directed acyclic graphs , non - exchangeability ,... | * abstract . * this paper considers the problem of estimating the structure of multiple related directed acyclic graph ( dag ) models . building on recent developments in exact estimation of dags using integer linear programming ( ilp ) , we present an ilp approach for joint estimation over multiple dags , that does no... |
1404.1238 | c | this paper introduced a general statistical framework for joint estimation of multiple dags . we considered regularisation based on graphical structure and showed how map estimators in this setting could be characterised as the solutions to ilps that admit efficient exact algorithms based on branching - and - cutting a... | building on recent developments in exact estimation of dags using integer linear programming ( ilp ) , we present an ilp approach for joint estimation over multiple dags , that does not require that the vertices in each dag share a common ordering . furthermore , we allow also for ( potentially unknown ) dependency str... | * abstract . * this paper considers the problem of estimating the structure of multiple related directed acyclic graph ( dag ) models . building on recent developments in exact estimation of dags using integer linear programming ( ilp ) , we present an ilp approach for joint estimation over multiple dags , that does no... |
1212.2061 | i | in this article we study differential inclusions of the form @xmath0 where @xmath1 denotes the derivative with respect to time and @xmath2 is assumed to be a maximal monotone relation in time and space . the bounded linear operator @xmath3 , also acting in time and space , is a so - called linear material law , as it w... | * abstract . * we study an abstract class of autonomous differential inclusions in hilbert spaces and show the well - posedness and causality , by establishing the operators involved as maximal monotone operators in time and space . then the proof of the well - posedness relies on a well - known perturbation result for... | * abstract . * we study an abstract class of autonomous differential inclusions in hilbert spaces and show the well - posedness and causality , by establishing the operators involved as maximal monotone operators in time and space . then the proof of the well - posedness relies on a well - known perturbation result for... |
1303.3847 | i | density functional theory ( dft ) and coupled - cluster ( cc ) theory are the two dominant paradigms for the computation of many - electron ground states with complementary capabilities . both theories are built upon the independent - orbital and self - consistent field ( scf ) structure of hartree - fock ( hf ) theory... | + the random - phase approximation with second - order screened exchange ( rpa+sosex ) is a model of electron correlation energy with two caveats : its accuracy depends on an arbitrary choice of mean field , and it scales as operations and memory for electrons . we derive a new algorithm that reduces its scaling to ope... | + the random - phase approximation with second - order screened exchange ( rpa+sosex ) is a model of electron correlation energy with two caveats : its accuracy depends on an arbitrary choice of mean field , and it scales as operations and memory for electrons . we derive a new algorithm that reduces its scaling to ope... |
astro-ph0002070 | c | all the previous section should have made clear that globular clusters can be used for a very wide variety of studies . they can constrain the star formation history of galaxies , in particular on the two or more distinct epochs of star formation in early - type galaxies . they can help explaining the building up of sp... | in particular , we address the star - formation histories of early - type galaxies ; globular cluster population in late - type galaxies and their link to early - type galaxies ; star and cluster formation during mergers and violent interactions ; and the kinematics at large radii in early - type galaxies . | _ we present an overview of observational progress in the study of extragalactic globular cluster systems . globular clusters turn out to be excellent tracers not only for the star - formation histories in galaxies , but also for kinematics at large galactocentric radii . their properties can be used to efficiently con... |
1203.0760 | i | this paper concerns the theory of constant mean curvature ( _ cmc _ for short ) surfaces @xmath3 in @xmath1 . the value @xmath3 is critical in the sense that there is no compact cmc surface for @xmath4 while for @xmath5 there are rotational compact examples . a half - space theorem in @xmath1 ( see @xcite ) proves that... | we show that a particular family of complete entire graphs over admits a structure of infinite dimensional manifold with local control on the behaviors at infinity . deforming non degenerate constant mean curvature annuli , we provide a large class of ( non rotational ) examples and construct ( possibly embedded ) annu... | _ we study constant mean curvature surfaces in that admit a compactification of the mean curvature operator . we show that a particular family of complete entire graphs over admits a structure of infinite dimensional manifold with local control on the behaviors at infinity . these graphs also appear to have a half - sp... |
1009.2741 | i | transport coefficients are essential inputs to describe the space - time evolution of systems not far from equilibrium . during the last years there has been a very active effort to analyze them from both the theoretical and phenomenological points of view in the context of heavy - ion collisions , condensed matter phy... | a calculation of the bulk viscosity for the massive gross - neveu model at zero fermion chemical potential is presented in the large- limit . the main motivation is , by decreasing the bare mass , to analyze whether there is a correlation between the maximum in the trace anomaly and a possible maximum in the bulk visco... | a calculation of the bulk viscosity for the massive gross - neveu model at zero fermion chemical potential is presented in the large- limit . this model resembles qcd in many important aspects : it is asymptotically free , has a dynamically generated mass gap , and for zero bare fermion mass it is scale invariant at th... |
1207.0644 | i | a relativistic charge in a rectilinear and uniform motion can originate an electromagnetic radiative mechanism crossing the dielectric interface between two different media . the fast dipolar oscillation of the polarization charge , induced on the dielectric interface by the relativistic charge , generates indeed an in... | the case of a electron bunch hitting at a normal angle of incidence a flat metallic surface with arbitrary size and shape will be considered . the covariance feature of the transition radiation energy spectrum deals instead with the lorentz invariance of the projection of the electron spatial density in the transverse ... | a charge - density - like covariance is expected to characterize the transition radiation energy spectrum of a electron bunch as far as the charge form factor is intended to account for bunch - density effects in the radiation emission . the beam charge passing from a single electron to a high density electron bunch , ... |
1207.0644 | c | in the present paper , the issue of the covariant formulation of the radiation energy spectrum and , consequently , of the charge form factor of a @xmath0 electron bunch is argued . the @xmath0 electron bunch is supposed to collide , at a normal angle of incidence , onto a metallic screen @xmath7 which has an arbitrary... | a charge - density - like covariance is expected to characterize the transition radiation energy spectrum of a electron bunch as far as the charge form factor is intended to account for bunch - density effects in the radiation emission . the beam charge passing from a single electron to a high density electron bunch , ... | a charge - density - like covariance is expected to characterize the transition radiation energy spectrum of a electron bunch as far as the charge form factor is intended to account for bunch - density effects in the radiation emission . the beam charge passing from a single electron to a high density electron bunch , ... |
1003.2184 | i | [ s-01 ] the surfaces possessing nontrivial deformations which preserve principal curvatures and directions ( or , equivalently , the shape operator ) were investigated by several authors , see @xcite , @xcite and review with bibliography in @xcite . it is known that surfaces with one family of principal curves bei... | a class of surfaces - graphs in a riemannian 3-space with a prescribed projection of one field of principal directions onto a surface is considered . a problem of determination of such surfaces when both principal curvatures are given over a line in is formulated and studied . the geometric problem is reduced to the ... | a class of surfaces - graphs in a riemannian 3-space with a prescribed projection of one field of principal directions onto a surface is considered . a problem of determination of such surfaces when both principal curvatures are given over a line in is formulated and studied . the geometric problem is reduced to the ... |
1107.4784 | i | conformal blocks , which are defined on the ( punctured ) riemann surfaces , holomorphic in each @xmath1 coordinate except when they meet each other , play an essential role in building correlation functions in two dimensional ( euclidean ) conformal field theories@xcite . they can be best understood as sewing together... | a complete construction of the aflt states is proposed . with this construction and for all the cases we have checked , the agt conjecture on the equivalence of nekrasov instanton counting ( nic ) to the conformal block has been verified to be true . bao shou , jian - feng wu , and ming yu .5 cm _ institute of th... | a complete construction of the aflt states is proposed . with this construction and for all the cases we have checked , the agt conjecture on the equivalence of nekrasov instanton counting ( nic ) to the conformal block has been verified to be true . bao shou , jian - feng wu , and ming yu .5 cm _ institute of th... |
1407.6547 | i | in 2012 , a higgs boson was discovered at the cern large hadron collider ( lhc ) @xcite . its observed properties are consistent with the prediction in the standard model ( sm ) within the current experimental uncertainties @xcite . in addition , so far , no report has been delivered to us for discovery of the other ... | , the lower limit on the mass of has been set at about 400 gev by atlas and cms collaborations . on the other hand , for the case where the latter decay mode is dominant , no dedicated search has been performed in the past . by taking into account characteristic signals of in the diboson decay scenario at lep and the ... | a direct search for doubly - charged higgs bosons is one of the most important probe in the higgs triplet model , which is motivated by generation mechanisms of tiny neutrino masses . there are two major decay modes of ; i.e. , the same - sign dilepton decay and the same - sign diboson decay . for the case where the fo... |
1601.06502 | i | a _ multiset _ is a generalization of a set in which each element has an associated integer _ multiplicity_. given a possibly infinite set @xmath4 , a set ( resp . multiset ) homomorphic hash function on @xmath4 maps finite subsets of @xmath4 ( resp . finitely - supported multisets on @xmath4 ) to fixed - length hash v... | a homomorphic , or incremental , multiset hash function , associates a hash value to arbitrary collections of objects ( with possible repetitions ) in such a way that the hash of the union of two collections is easy to compute from the hashes of the two collections themselves : it is simply their sum under a suitable g... | a homomorphic , or incremental , multiset hash function , associates a hash value to arbitrary collections of objects ( with possible repetitions ) in such a way that the hash of the union of two collections is easy to compute from the hashes of the two collections themselves : it is simply their sum under a suitable g... |
1703.10128 | i | rapid experimental advances in the creation of finite systems of ultracold atoms using few optical traps ( bottom - up ) @xcite or through the use of extended optical lattices ( top - down ) @xcite are promising approaches toward realization of feynman s vision of a quantum simulator @xcite , capable of finding solutio... | a microscopic configuration - interaction ( ci ) methodology is introduced to enable bottom - up schrdinger - equation emulation of unconventional superconductivity in ultracold optical traps . we illustrate the method by exploring the properties ofli atoms in a single square plaquette in the hole - pairing regime , an... | a microscopic configuration - interaction ( ci ) methodology is introduced to enable bottom - up schrdinger - equation emulation of unconventional superconductivity in ultracold optical traps . we illustrate the method by exploring the properties ofli atoms in a single square plaquette in the hole - pairing regime , an... |
astro-ph0508178 | c | sources qr6 , qr8 , and qr9 show the major properties of stellar wind emission : ( 1 ) they have rising spectral indices in the range of + 0.5 to + 1.0 , ( 2 ) they are unresolved sources at the resolutions observed , which means their physical sizes are @xmath14 0.2 ( 0.009 pc ) at 22.5 ghz and @xmath140.5 ( 0.02 pc... | a multi - frequency , multi - configuration study has been made of the compact radio sources in the galactic center quintuplet and arches stellar clusters using the very large array . we conclude that the three most compact of these sources are produced by stellar wind emission ; thus , mass - loss rates can be derived... | a multi - frequency , multi - configuration study has been made of the compact radio sources in the galactic center quintuplet and arches stellar clusters using the very large array . ten radio sources have been detected in the quintuplet cluster . the majority of these radio sources have rising spectral indices and ar... |
astro-ph0508178 | c | we have made multi - frequency radio observations of both the quintuplet and arches clusters using the vla . our conclusions can be summarized as follows : \(1 ) ten radio sources have been detected in the quintuplet cluster . the majority of these sources have rising spectral indices and are positionally coincident... | ten radio sources have been detected in the quintuplet cluster . the majority of these radio sources have rising spectral indices and are positionally coincident with young massive stars that are known to have powerful stellar winds . if so , these sources would be the first detections of embedded massive stars to be d... | a multi - frequency , multi - configuration study has been made of the compact radio sources in the galactic center quintuplet and arches stellar clusters using the very large array . ten radio sources have been detected in the quintuplet cluster . the majority of these radio sources have rising spectral indices and ar... |
0905.2026 | i | the @xmath11 reaction is one of the critical links in the @xmath12 and @xmath13 branches of the @xmath14chain of solar hydrogen burning [ 13 ] . the total capture rate determined by processes of this chain is sensitive to the cross section @xmath15 ( or the astrophysical @xmath0 factor @xmath6 ) for the @xmath16 reacti... | a new analysis of the modern precise measured astrophysical factors for the direct capture reaction [ b.s . new estimates are obtained for theindirectly determined values of the asymptotic normalization constants ( the nuclear vertex constants ) for(g.s . ) and(0.429 mev ) as well as the astrophysical factors at e 90 k... | a new analysis of the modern precise measured astrophysical factors for the direct capture reaction [ b.s . nara singh _ et al . _ , phys.rev.lett . * 93 * , 262503 ( 2004 ) ; d. bemmerer _ et al . _ , phys.rev.lett . * 97 * , 122502 ( 2006 ) ; f.confortola _ et al . _ , phys.rev.c * 75 * , 065803 ( 2007 ) , t.a.d.brow... |
0905.2026 | c | the analysis of the modern experimental astrophysical @xmath0 factors , @xmath111 , for the @xmath16 reaction , which were precisely measured at energies @xmath8=92.9 - 1235 kev [ 611 ] , has been performed within the modified two - body potential approach @xcite . the performed scrupulous analysis shows quantitatively... | nara singh _ et al . _ , phys.rev.lett . * 93 * , 262503 ( 2004 ) ; d. bemmerer _ et al . _ , phys.rev.lett . * 97 * , 122502 ( 2006 ) ; f.confortola _ et al . _ , phys.rev.c * 75 * , 065803 ( 2007 ) , t.a.d.brown _ et al . _ , phys.rev . c * 76 * , 055801 ( 2007 ) and a di leva , _ the values of asymptotic normalizati... | a new analysis of the modern precise measured astrophysical factors for the direct capture reaction [ b.s . nara singh _ et al . _ , phys.rev.lett . * 93 * , 262503 ( 2004 ) ; d. bemmerer _ et al . _ , phys.rev.lett . * 97 * , 122502 ( 2006 ) ; f.confortola _ et al . _ , phys.rev.c * 75 * , 065803 ( 2007 ) , t.a.d.brow... |
1002.3607 | c | we have detected a moving group of at least four bhb stars in the corner ( toe " ) of the hercules constellation spilling into corona borealis . these stars are coincident in angular position [ @xmath168 ) ] , apparent magnitude ( @xmath1 ) , line - of - sight velocity ( @xmath4 km s@xmath3 , @xmath169 km s@xmath3 , @... | a new moving group comprising at least four blue horizontal branch ( bhb ) stars is identified at ) . we explore the systematics of sdss dr7 surface gravity metallicity determinations for faint bhb stars , and present a technique for estimating the significance of clumps discovered in multidimensional data . | a new moving group comprising at least four blue horizontal branch ( bhb ) stars is identified at ) . the horizontal branch at magnitude implies a distance of 50 kpc from the sun . the heliocentric radial velocity is km s , corresponding to km s ; the dispersion in line - of - sight velocity is consistent with the inst... |
0802.2399 | i | _ boundary alignment _ is a critical feature of meshes in many applications . in a boundary aligned mesh the boundary , or some other line , is traced by the sides of high - quality cells , see fig . [ fig : bound_align ] . the definition of a well - shaped cell may be application dependent , but in many cases , cells... | away from irregular vertices , the resulting meshes have the properties of nearly conformal grids . the technique is based on a theoretical relation between the present problem , and the inverse poisson ( ip ) problem with point sources . the ip algorithm is incorporated in a complete mesh generation scheme , which als... | a novel approach to unstructured quadrilateral mesh generation for planar domains is presented . away from irregular vertices , the resulting meshes have the properties of nearly conformal grids . the technique is based on a theoretical relation between the present problem , and the inverse poisson ( ip ) problem with ... |
1509.07090 | i | the question whether there exists an underlying principle to understand the pattern of lepton mixing , which is quite different from the quark mixing , demands the study of neutrino mass matrix as well as the charged lepton one into a deeper level . the smallness of neutrino masses can be well understood by the seesaw ... | while the magnitude of its complex vev is responsible for generating , its phase part induces the low energy cp violating phase ( ) and the cp violation required for leptogenesis . hence the triplet contribution , although sub - dominant , plays crucial role in providing a common source for non - zero , and cp - violat... | a possible interplay between the two terms of the general type - ii seesaw formula is exercised which leads to the generation of nonzero . the specific flavor structure of the model , guided by the symmetry and accompanied with the standard model singlet flavons , yields the conventional seesaw contribution to produce ... |
1411.6098 | i | approaches used to compute vibration - rotation energy levels and wave functions include methods based on perturbation theory , effective hamiltonians and on the use of the variational principle . each of these methods has its advantages and disadvantages when used for larger molecules such as those with more than ten ... | a procedure for calculation of rotation - vibration states of medium sized molecules is presented . it combines the advantages of variational calculations and perturbation theory . the vibrational problem is solved by diagonalizing a hamiltonian matrix , which is partitioned into two sub - blocks . numerical examples s... | a procedure for calculation of rotation - vibration states of medium sized molecules is presented . it combines the advantages of variational calculations and perturbation theory . the vibrational problem is solved by diagonalizing a hamiltonian matrix , which is partitioned into two sub - blocks . the first , smaller ... |
1411.6098 | m | inclusion of rotational motion into the problem adds an extra level of complexity , especially when highly excited rotational states are required . the dimension of the ro - vibrational problem @xmath108 is normally increased by the factor of @xmath109 , where @xmath0 is the total angular momentum quantum number . in t... | the first , smaller sub - block includes matrix elements with the largest contribution to the energy levels targeted in the calculations . numerical perturbation theory , implemented as a jacobi rotation , is used to compute the contributions from the matrix elements of the second sub - block . calculations of the vibr... | a procedure for calculation of rotation - vibration states of medium sized molecules is presented . it combines the advantages of variational calculations and perturbation theory . the vibrational problem is solved by diagonalizing a hamiltonian matrix , which is partitioned into two sub - blocks . the first , smaller ... |
1308.2455 | i | the helicity of a vector field is a topological index measuring the _ link _ , _ twist _ and _ writhe _ of the field lines . here we say ` index ' because it is invariant under the action of diffeomorphism groups generated by some ideal dynamics . conventionally , the helicity is defined for three - dimensional vectors... | a relativistic helicity has been formulated in the four - dimensional minkowski space - time . whereas the relativistic distortion of space - time violates the conservation of the conventional helicity , the newly defined relativistic helicity conserves in a barotropic fluid or plasma , dictating a fundamental topologi... | a relativistic helicity has been formulated in the four - dimensional minkowski space - time . whereas the relativistic distortion of space - time violates the conservation of the conventional helicity , the newly defined relativistic helicity conserves in a barotropic fluid or plasma , dictating a fundamental topologi... |
astro-ph0402117 | i | we have created a sample of 123 variable radio sources using two epoch observations of a zero - dec strip toward the south galactic cap . this sample spans the range of radio flux densities from @xmath1 to 1000 mjy . it presents both in size and radio flux density coverage a unique starting point for variability studie... | a sample of 123 radio sources that exhibit significant variations at 1.4 ghz on a seven year base - line has been created using first vla b - array data from 1995 and 2002 on a strip at near the south galactic cap . this sample spans the range of radio flux densities from to 1000 mjy . it presents both in size and radi... | a sample of 123 radio sources that exhibit significant variations at 1.4 ghz on a seven year base - line has been created using first vla b - array data from 1995 and 2002 on a strip at near the south galactic cap . this sample spans the range of radio flux densities from to 1000 mjy . it presents both in size and radi... |
astro-ph0610043 | r | in our grb model , there are seven adjustable parameters : the @xmath56 spectral power - law indices @xmath179 and @xmath180 , the power - law index @xmath120 of the jet opening - angle distribution , the range of the jet opening angles @xmath181 and @xmath182 , the absolute emitted @xmath13-ray energy @xmath21 , and t... | , we find that the data can only be fitted if the comoving rate - density of grb sources exhibits positive evolution to 5 . the mean intrinsic beaming factor of grbs is found to range from 42 , with the average opening half - angle , compared to the pre- average of . within the uniform jet model , the grb luminosit... | a simple physical model for long - duration gamma ray bursts ( grbs ) is used to fit the redshift ( ) and the jet opening - angle distributions measured with earlier grb missions and with . the effect of different sensitivities for grb triggering is sufficient to explain the difference in the distributions of the pre- ... |
astro-ph0610043 | c | in this work , we considered whether the differences between the pre- and redshift distributions can be explained with a physical model for grbs that takes into account the different flux thresholds of grb detectors . the model presented here parameterizes the jet opening angle distribution for an assumed flat @xmath... | a simple physical model for long - duration gamma ray bursts ( grbs ) is used to fit the redshift ( ) and the jet opening - angle distributions measured with earlier grb missions and with . the effect of different sensitivities for grb triggering is sufficient to explain the difference in the distributions of the pre- ... | a simple physical model for long - duration gamma ray bursts ( grbs ) is used to fit the redshift ( ) and the jet opening - angle distributions measured with earlier grb missions and with . the effect of different sensitivities for grb triggering is sufficient to explain the difference in the distributions of the pre- ... |
1303.3911 | i | in the present work the equation @xmath0 , \label{i1}\ ] ] is studied , where @xmath1 is a real number , @xmath2 , @xmath3 is a complex - valued continuous function on @xmath4 $ ] satisfying a growth bound @xmath5 at the origin for some @xmath6 , @xmath7 $ ] are complex valued functions , and @xmath8 is a ( complex )... | a spectral parameter power series ( spps ) representation for regular solutions of singular bessel type sturm - liouville equations with complex coefficients is obtained as well as an spps representation for the ( entire ) characteristic function of the corresponding spectral problem on a finite interval . it is proved... | a spectral parameter power series ( spps ) representation for regular solutions of singular bessel type sturm - liouville equations with complex coefficients is obtained as well as an spps representation for the ( entire ) characteristic function of the corresponding spectral problem on a finite interval . it is proved... |
1607.02058 | i | the study of the @xmath9 interaction with coupled channels has been a traditional test field for chiral dynamics in its unitarized version . since the pioneer works of @xcite , many works have been done in this field including also the contribution of the higher order chiral lagrangians ( see recent review in @xcite ... | a theoretical investigation is done to clarify the origin of the peak structure observed near the threshold in the in - flight reaction of the j - parc e15 experiment , which could be a signal of the lightest kaonic nuclei , that is , the state . for the investigation one assumes that the resonance is generated after t... | a theoretical investigation is done to clarify the origin of the peak structure observed near the threshold in the in - flight reaction of the j - parc e15 experiment , which could be a signal of the lightest kaonic nuclei , that is , the state . for the investigation , we evaluate the invariant mass spectrum assuming ... |
cond-mat0002259 | i | the unexpected discovery of high-@xmath0 itinerant ferromagnetism in doped hexaborides@xcite has re - ignited interest in the problem of excitonic ordering near the semiconductor metal transition.@xcite excitonically ordered states are characterized by an off - diagonal order parameter describing pairing between con... | a tight binding model is introduced to describe the strong interaction limit of excitonic ordering . at stoichiometry excitonic order appears in the pseudo - spin model as in - plane pseudo - magnetism . the u(4 ) symmetry unifies all possible singlet and triplet order parameters describing such states . super - exchan... | a tight binding model is introduced to describe the strong interaction limit of excitonic ordering . at stoichiometry , the model reduces in the strong coupling limit to a pseudo - spin model with approximate u(4 ) symmetry . excitonic order appears in the pseudo - spin model as in - plane pseudo - magnetism . the u(4 ... |
0707.4135 | i | in polynomial dynamics , _ dynamic rays _ , which foliate the set of escaping points ( points which tend to @xmath6 under iteration ) , were introduced by douady and hubbard as a tool in their famous work on the mandelbrot set @xcite . since then , dynamic rays , and their landing properties in particular , have been a... | a transcendental entire function is called _ geometrically finite _ if the intersection of the set of singular values with the fatou set is compact and the intersection of the postsingular set with the julia set is finite . ( in particular , this includes all entire functions with finite postsingular set . ) | a transcendental entire function is called _ geometrically finite _ if the intersection of the set of singular values with the fatou set is compact and the intersection of the postsingular set with the julia set is finite . ( in particular , this includes all entire functions with finite postsingular set . ) if is geom... |
nlin0410050 | i | the cascade of energy to low wavenumbers in two - dimensional turbulence @xcite , more than other turbulence problems , is suited to the standard methods of statistical field theory and the renormalization group ( rg ) . these methods @xcite , originating in quantum field theory , show that arbitrary short - distance i... | rev . a * 16 * , 732 ( 1977 ) ] . with friction , which dissipates energy at low wavenumbers , one expects a stationary inverse energy cascade for strong enough stirring . thus the kolmogorov scaling of the inverse cascade can not be explained by any rg fixed point . an ideal cascade requires a linear function for lar... | a two - dimensional fluid , stirred at high wavenumbers and damped by both viscosity and linear friction , is modeled by a statistical field theory . the fluid s long - distance behavior is studied using renormalization - group ( rg ) methods , as begun by forster , nelson , and stephen [ phys . rev . a * 16 * , 732 ... |
1109.6555 | i | understanding how surfaces may constrain the configuration of biopolymers on mesoscopic scales is important in a number of processes in cell biology . it is particularly relevant in the packing of dna within viral envelopes @xcite . modeling all of the relevant interactions is complicated : one needs to accommodate the... | a variational framework is developed to examine the equilibrium states of a semiflexible polymer that is constrained to lie on a fixed surface . as an application the confinement of a closed polymer loop of fixed length within a spherical cavity of smaller radius , , is considered . it is shown that an infinite number ... | a variational framework is developed to examine the equilibrium states of a semiflexible polymer that is constrained to lie on a fixed surface . as an application the confinement of a closed polymer loop of fixed length within a spherical cavity of smaller radius , , is considered . it is shown that an infinite number ... |
0901.3835 | i | a well - known consequence of the ergodic decomposition theorem is that the space of invariant probability measures of a topological dynamical system , endowed with the weak@xmath0 topology , is a metrizable choquet simplex .. ] the purpose of this paper is to show that every non - empty metrizable choquet simplex aris... | a well - known consequence of the ergodic decomposition theorem is that the space of invariant probability measures of a topological dynamical system , endowed with the weak topology , is a non - empty metrizable choquet simplex . we show that every non - empty metrizable choquet simplex arises as the space of invarian... | a well - known consequence of the ergodic decomposition theorem is that the space of invariant probability measures of a topological dynamical system , endowed with the weak topology , is a non - empty metrizable choquet simplex . we show that every non - empty metrizable choquet simplex arises as the space of invarian... |
1604.00646 | i | electrons accelerate and radiate radio emission either when they pass near charged particle , or when they propagate in a magnetic field . in the earlier case , the free - free spectral slope @xmath14 is @xmath15 from the radio to @xmath16 . the thermal free - free emission is not viable in objects with a power - law e... | accretion discs in agn may be associated with coronal gas , as suggested by their x - ray emission . we calculate the coronal properties required to produce the observed radio emission in rq agn , either from synchrotron emission of power - law ( pl ) electrons , or from cyclo - synchrotron emission of hot mildly - rel... | accretion discs in agn may be associated with coronal gas , as suggested by their x - ray emission . stellar coronal emission includes radio emission , and agn corona may also be a significant source for radio emission in radio quiet ( rq ) agn . we calculate the coronal properties required to produce the observed radi... |
1604.00646 | r | below we present the results of the numerical calculations of the radio emission . the calculations are for the disc and spherical geometries , and for thermal and pl electrons . in all cases we assume an isothermal corona , and a decreasing @xmath188 , i.e. @xmath241 , and @xmath242 ( eq.[eq : tnb_on_r ] ) . the value... | a spectral break to an optically thin power - law emission is expected around 300 - 1000 ghz , as the innermost corona becomes optically thin . in case of thermal electrons , the position of the break can be measured with vlbi observations , which exclude the cold dust emission , and it can be used to probe the proper... | accretion discs in agn may be associated with coronal gas , as suggested by their x - ray emission . stellar coronal emission includes radio emission , and agn corona may also be a significant source for radio emission in radio quiet ( rq ) agn . we calculate the coronal properties required to produce the observed radi... |
1604.00646 | c | we explore the possible radio emission from either a flat or a spherical magnetized corona , powered by either pl or thermal electrons . we concentrate on flat spectra models , which characterize about half of rq agn , and is the main signature of a compact emission region such as a corona . our main conclusions are as... | we find that a flat spectrum , as observed in about half of rq agn , can be produced by corona with a disc or a spherical configuration , which extends from the innermost regions out to a pc scale . ii we derive additional constraints on the coronal parameters from the gudel - benz relation , , which rq agn follow . | accretion discs in agn may be associated with coronal gas , as suggested by their x - ray emission . stellar coronal emission includes radio emission , and agn corona may also be a significant source for radio emission in radio quiet ( rq ) agn . we calculate the coronal properties required to produce the observed radi... |
1307.2952 | i | since the launch of modern x - ray space telescopes like and x - ray observatories , x - ray astronomy has entered the epoch of grating observations that can produce spectra with much improved energy resolution . in these spectra narrow absorption / emission lines , which have never been observed before , now have been... | accurate atomic transition data are important in many astronomical research areas especially in line spectroscopy study . whereas transition data of he - like and h - like ions ( i.e. , ions at high - charge states ) are accurately calculated , that of k transitions of neutral or low - ionized metal elements are still ... | accurate atomic transition data are important in many astronomical research areas especially in line spectroscopy study . whereas transition data of he - like and h - like ions ( i.e. , ions at high - charge states ) are accurately calculated , that of k transitions of neutral or low - ionized metal elements are still ... |
1307.2952 | c | in the section 3 , two different methods are used to merge all the 36 observations . method 1 is very simple : we only need to add the counts of each spectrum channel by channel , i.e. , every spectrum has the same weight . however , method 1 implicitly assumes that all the spectra have the same absorption column densi... | 2009 ) , our results improve the accuracy of wavelengths by a factor from two to five and significantly reduce the systematic uncertainties and biases . several weak transitions ( e.g. , 1s2p of and ; 1s3p of and ) are also detected for the first time , albeit with low significance ; future observations with improved... | accurate atomic transition data are important in many astronomical research areas especially in line spectroscopy study . whereas transition data of he - like and h - like ions ( i.e. , ions at high - charge states ) are accurately calculated , that of k transitions of neutral or low - ionized metal elements are still ... |
1307.2952 | i | so far , the wavelengths of k alpha absorption lines of neutral , low - ionized , and moderate - ionized o , ne , and mg have not been determined precisely , either in theoretical calculations ( e.g. , v96 ; nist ) , laboratory measurements ( stolte et al . 1997 ) , or in astronomical observations ( j0406 ; y09 ) . in ... | we correct the galactic rotation velocity to the rest frame for every observation and then use two different methods to merge all the corrected spectra to a co - added spectrum . however the co - added spectra obtained by these methods exhibit biases , either to the observations of high counts or high signal - to - noi... | accurate atomic transition data are important in many astronomical research areas especially in line spectroscopy study . whereas transition data of he - like and h - like ions ( i.e. , ions at high - charge states ) are accurately calculated , that of k transitions of neutral or low - ionized metal elements are still ... |
cond-mat0110539 | i | the formation , resonant or phonon - assisted , of qw excitons and their following relaxation towards a final ( quasi- ) equilibrium thermodynamic state at low lattice temperature @xmath2 are the subject of numerous experimental @xcite and theoretical @xcite studies . recently , relaxation thermodynamics has been formu... | acoustic - phonon - assisted thermalization kinetics of excitons in quantum wells ( qws ) is developed for small concentrations of particles , , when particle - particle interaction can be neglected while bose - einstein statistics already strongly influences the relaxation processes at low temperatures . in this case ... | acoustic - phonon - assisted thermalization kinetics of excitons in quantum wells ( qws ) is developed for small concentrations of particles , , when particle - particle interaction can be neglected while bose - einstein statistics already strongly influences the relaxation processes at low temperatures . in this case ... |
1403.2216 | i | the pauli hamiltonian describes a non - relativistic electron with gyromagnetic constant @xmath6 @xmath7 @xmath8 is the vector of pauli matrices and @xmath9 acts on spinors . we use units where @xmath10 . the electric and magnetic fields are determined by the 4-potential @xmath11 : [ fields ] = , = - + a_0 in 1979 a... | aharonov and casher showed that pauli hamiltonians in two dimensions have gapless zero modes . we study the adiabatic evolution of these modes under the slow motion of fluxons with fluxes . the positions , , of the fluxons are viewed as controls . the holonomies can sometimes be abelian , but in general are not . | aharonov and casher showed that pauli hamiltonians in two dimensions have gapless zero modes . we study the adiabatic evolution of these modes under the slow motion of fluxons with fluxes . the positions , , of the fluxons are viewed as controls . we are interested in the holonomies associated with closed paths in the ... |
0706.1442 | r | in order to check the effects of the np described above , the probability differences @xmath132 ( eq.([e234 ] ) ) for two energy ranges and several baselines , have been calculated . both , the energy ranges and the baselines have been chosen in prospect of the existing , planned , and feasible experiments . in view of... | the possibility of the discovery of such effects in current and future neutrino oscillation experiments is discussed . it appears that the biggest potential of the discovery of the possible presence of any new physics is pronounced in oscillation channels in which , are not involved at all , especially for two baseline... | an extension of the new standard model , by introducing a mixing of the low mass `` active '' neutrinos with heavy ones , or by any model with lepton flavor violation , is considered . this leads to non - orthogonal neutrino production and detection states and to modifications of neutrino oscillations in both , vacuum ... |
0706.1442 | c | in the paper , by introducing a mixing of the low mass `` active '' neutrinos with heavy ones , we have investigated a possible new physics ( np ) scenario which is already present at the @xmath8 scale , that means , at energies close to our present - day experimental facilities . in the presented model ( as also in an... | an extension of the new standard model , by introducing a mixing of the low mass `` active '' neutrinos with heavy ones , or by any model with lepton flavor violation , is considered . first order approximation formulas for the flavor transition probabilities in constant density matter , for all experimentally availabl... | an extension of the new standard model , by introducing a mixing of the low mass `` active '' neutrinos with heavy ones , or by any model with lepton flavor violation , is considered . this leads to non - orthogonal neutrino production and detection states and to modifications of neutrino oscillations in both , vacuum ... |
0801.1329 | c | in this paper , we have applied a versatile statistical tool , the maximum likelihood technique , to assess the distribution of stellar mass and the incidence of binaries in the pleiades . we began with a near - infrared catalog of cluster members . our basic assumption was that all cluster members share the same evolu... | as part of an effort to understand the origin of open clusters , we present a statistical analysis of the currently observed pleiades . starting with a photometric catalog of the cluster , we employ a maximum likelihood technique to determine the mass distribution of its members , including single stars and both compon... | as part of an effort to understand the origin of open clusters , we present a statistical analysis of the currently observed pleiades . starting with a photometric catalog of the cluster , we employ a maximum likelihood technique to determine the mass distribution of its members , including single stars and both compon... |
astro-ph0312263 | c | b0218 + 357 is one of the most promising lens systems for determining the hubble constant with the method of @xcite . this method has , compared with other approaches , the advantage that it is a very simple one - step determination and relies on the understanding of only very little astrophysics . in this way the sys... | b0218 + 357 is one of the most promising systems to determine the hubble constant from time - delays in gravitational lenses . consisting of two bright images , which are well resolved in vlbi observations , plus one of the most richly structured einstein rings , it potentially provides better constraints for the mass... | b0218 + 357 is one of the most promising systems to determine the hubble constant from time - delays in gravitational lenses . consisting of two bright images , which are well resolved in vlbi observations , plus one of the most richly structured einstein rings , it potentially provides better constraints for the mass... |
1509.00252 | i | the self - consistent mean - field approach , based on an energy density functional ( edf ) , is a tool of choice to study nuclei in any region of the nuclear chart @xcite . it allows to calculate the properties of the ground state but also of alternative configurations , like shape isomers , or to follow the behaviur... | background : : mean - field methods based on an energy density functional ( edf ) are powerful tools used to describe many properties of nuclei in the entirety of the nuclear chart . we study this numerical accuracy in detail for a specific numerical choice of representation for the mean - field equation... | background : : mean - field methods based on an energy density functional ( edf ) are powerful tools used to describe many properties of nuclei in the entirety of the nuclear chart . the accuracy required on energies for nuclear physics and astrophysics applications is of the order of 500 kev and much e... |
1402.4220 | i | functional models from analytic functions were developed by sz.nagy-foias @xcite and used for classifying contractive operators on hilbert spaces . a similar approach was used by popescu in @xcite for classifying row contractions by certain multi - analytic operators . these classifying objects were called characterist... | based on a careful analysis of functional models for contractive multi - analytic operators we establish a one - to - one correspondence between unitary equivalence classes of minimal contractive liftings of a row contraction and injective symbols of contractive multi - analytic operators . this allows an effective con... | based on a careful analysis of functional models for contractive multi - analytic operators we establish a one - to - one correspondence between unitary equivalence classes of minimal contractive liftings of a row contraction and injective symbols of contractive multi - analytic operators . this allows an effective con... |
0707.4056 | i | according to the nonrelativistic qcd ( nrqcd ) factorization formalism , an annihilation decay rate of a spin - triplet @xmath13-wave ( @xmath14 ) bottomonium @xmath15 in @xmath0 , where @xmath16 is the radial quantum number , unless it is necessary . ] is expressed as an infinite series of nrqcd matrix elements with c... | based on the nrqcd factorization formalism , we calculate the inclusive charm production rate in decay at leading order in the strong coupling constant and the relative velocity of the quark in the quarkonium rest frame . the branching fractions for to charm for , , and are all around% . about% of the branching fractio... | based on the nrqcd factorization formalism , we calculate the inclusive charm production rate in decay at leading order in the strong coupling constant and the relative velocity of the quark in the quarkonium rest frame . the branching fractions for to charm for , , and are all around% . about% of the branching fractio... |
1310.1579 | i | chromosomes , the genetic material of a cell , are duplicated and properly segregated before the cell divides into two daughter cells @xcite . each of the sister chromatids , that result from chromosome replication , is bound to a proteinous structure , called kinetochore ( kt ) that , in turn , is coupled to the plus ... | before a cell divides into two daughter cells , chromosomes are replicated resulting in two sister chromosomes embracing each other . each sister chromosome is bound to a separate proteinous structure , called kinetochore ( kt ) , that captures the tip of a filamentous protein , called microtubule ( mt ) . we theoretic... | before a cell divides into two daughter cells , chromosomes are replicated resulting in two sister chromosomes embracing each other . each sister chromosome is bound to a separate proteinous structure , called kinetochore ( kt ) , that captures the tip of a filamentous protein , called microtubule ( mt ) . two opposite... |
1310.1579 | i | in this paper , we have presented theoretical models of kt - mt attachment at three levels of detail starting with a minimal version that captures only the key components and essential processes . these models mimic kt - mt attachments reconstituted _ in - vitro _ from purified components extracted from budding yeast @... | our models not only account for the experimentally observed `` catch - bond - like '' behavior of the kt - mt coupling , but also make new predictions on the probability distribution of the lifetimes of the attachments . in principle , our new predictions can be tested by analyzing the data collected in the _ in - vitr... | before a cell divides into two daughter cells , chromosomes are replicated resulting in two sister chromosomes embracing each other . each sister chromosome is bound to a separate proteinous structure , called kinetochore ( kt ) , that captures the tip of a filamentous protein , called microtubule ( mt ) . two opposite... |
1303.7153 | i | vortex states in mesoscopic superconductors have been extensively studied in the past two decades , both theoretically and experimentally.@xcite two main interactions have been found to govern vortex behavior in a mesoscopic system . the first one is the vortex - vortex interaction , which causes vortices to form abrik... | when the superconducting coherence length is comparable to the fermi wavelength , the shape resonances of the superconducting order parameter have strong influence on the vortex configuration . several unconventional vortex states , including asymmetric ones , giant multi - vortex combinations , and states comprising g... | bogoliubov - de gennes theory is used to investigate the effect of the size of a superconducting square on the vortex states in the quantum confinement regime . when the superconducting coherence length is comparable to the fermi wavelength , the shape resonances of the superconducting order parameter have strong influ... |
astro-ph9810039 | i | the ccds used in the wide field planetary camera 2 ( `` wfpc2 '' ) of the _ hubble space telescope _ are known to have imperfect charge - transfer efficiency ( `` cte '' ) . this property of the camera has adverse photometric consequences that have proven difficult to characterize quantitatively . the source of the pro... | charge - transfer effects in photometry with wide field planetary camera 2 aboard the _ hubble space telescope _ are investigated by a comparison of wfpc2 observations with groundbased photometry for the galactic globular clusters tauri and . simple numerical formulae describing the fraction of lost signal as function... | charge - transfer effects in photometry with wide field planetary camera 2 aboard the _ hubble space telescope _ are investigated by a comparison of wfpc2 observations with groundbased photometry for the galactic globular clusters tauri and . simple numerical formulae describing the fraction of lost signal as function... |
1609.01626 | c | our analysis demonstrates that the chlorine abundance can be measured in solar metallicity stars with temperatures below 3900 k. stars with temperatures above 3900 k are too warm to form the hcl molecule , with the one exception of hd 138481 , at an effective temperature of 3970 k but metal rich at [ fe / h]=+0.2 @xcit... | the average [cl / fe ] abundance in stars with 0.72[fe / h].20 is [cl / fe]=(0.10.15 ) dex . the mean difference between the [cl / fe ] ratios measured in our stars and chemical evolution model values is ( 0.16.15 ) dex . the cl versus o abundances from our sample match cl abundances measured in planetary nebula and re... | chlorine abundances are reported in 15 evolved giants and one m dwarf in the solar neighborhood . the cl abundance was measured using the vibration - rotation 1 - 0 p8 line of hcl at 3.69851 m . the high resolution l - band spectra were observed using the phoenix infrared spectrometer on the kitt peak mayall 4 m telesc... |
1306.5029 | i | in the orthogonal range reporting problem , we store a set of points @xmath5 in a data structure so that for an arbitrary range @xmath6\times \ldots\times [ a_d , b_d]$ ] all points from @xmath7 can be reported . due to its importance , one- and multi - dimensional range reporting was extensively studied in computation... | color ( or categorical ) range reporting is a variant of the orthogonal range reporting problem in which every point in the input is assigned a _ color_. while the answer to an orthogonal point reporting query contains all points in the query range , the answer to a color reporting query contains only distinct colors o... | color ( or categorical ) range reporting is a variant of the orthogonal range reporting problem in which every point in the input is assigned a _ color_. while the answer to an orthogonal point reporting query contains all points in the query range , the answer to a color reporting query contains only distinct colors o... |
cs0602092 | i | graphical models such as markov random fields ( mrfs ) are widely used in many application domains , including spatial statistics , statistical signal processing , and communication theory . a fundamental limitation to their practical use is the infeasibility of computing various statistical quantities ( e.g. , margina... | is used to construct an m - estimator for fitting parameters , and to perform approximate marginalization for the prediction step . the key result of this paper is that in the computation - limited setting , using an inconsistent parameter estimator ( i.e. , an estimator that returns the `` wrong '' model even in the i... | consider the problem of joint parameter estimation and prediction in a markov random field : i.e. , the model parameters are estimated on the basis of an initial set of data , and then the fitted model is used to perform prediction ( e.g. , smoothing , denoising , interpolation ) on a new noisy observation . working un... |
cs0602092 | c | key challenges in the application of markov random fields include the estimation ( learning ) of model parameters , and performing prediction using noisy samples ( e.g. , smoothing , interpolation , denoising ) . both of these problems present substantial computational challenges for general markov random fields . in t... | consider the problem of joint parameter estimation and prediction in a markov random field : i.e. , the model parameters are estimated on the basis of an initial set of data , and then the fitted model is used to perform prediction ( e.g. , smoothing , denoising , interpolation ) on a new noisy observation . working un... | consider the problem of joint parameter estimation and prediction in a markov random field : i.e. , the model parameters are estimated on the basis of an initial set of data , and then the fitted model is used to perform prediction ( e.g. , smoothing , denoising , interpolation ) on a new noisy observation . working un... |
1410.2300 | i | flows of realistic mixtures of miscible fluids exhibit several features that make them more difficult to simulate numerically than flows of simple fluids . firstly , the physical properties of the mixture depend on the concentration of the different species composing the mixture . this includes both the density of the ... | app . math . and comp . sci . comput . phys . , 16(5):1263 - 1297 , 2014 ] . do not use a fractional time - step approach in the spirit of projection methods , thus avoiding splitting errors and giving full second - order deterministic accuracy even in the presence of boundaries for a broad range of reynolds numbers in... | continuing on our previous work [ a. donev , a. nonaka , y. sun , t. g. fai , a. l. garcia and j. b. bell , comm . app . math . and comp . sci . , 9 - 1:47 - 105 , 2014 ] , we develop semi - implicit numerical methods for solving low mach number fluctuating hydrodynamic equations appropriate for modeling diffusive mixi... |
1410.2300 | c | we have developed a low mach number algorithm for diffusively - mixing mixtures of two liquids with potentially different density and transport coefficients . in the low mach number setting , the incompressible constraint is replaced by a quasi - compressible constraint that dictates that stochastic and diffusive mass ... | , 9 - 1:47 - 105 , 2014 ] , we develop semi - implicit numerical methods for solving low mach number fluctuating hydrodynamic equations appropriate for modeling diffusive mixing in isothermal mixtures of fluids with different densities and transport coefficients . we treat viscous dissipation implicitly using a recentl... | continuing on our previous work [ a. donev , a. nonaka , y. sun , t. g. fai , a. l. garcia and j. b. bell , comm . app . math . and comp . sci . , 9 - 1:47 - 105 , 2014 ] , we develop semi - implicit numerical methods for solving low mach number fluctuating hydrodynamic equations appropriate for modeling diffusive mixi... |
astro-ph9911476 | i | reverberation mapping , observing the degree and nature of the correlation between continuum and emission line flux variations , is one of the major tools for studying the distribution and kinematics of the gas in the broad line region ( blr ) of active galactic nuclei ( agn ; see reviews by peterson 1993 and by netzer... | correlated variations in the line and continuum emission from active galactic nuclei ( agn ) can be used to determine the size and geometry of the broad emission line regions ( blrs ) . we have spectrophotometrically monitored a well - defined sample of 28 palomar - green quasars in order to obtain measurements of thei... | correlated variations in the line and continuum emission from active galactic nuclei ( agn ) can be used to determine the size and geometry of the broad emission line regions ( blrs ) . we have spectrophotometrically monitored a well - defined sample of 28 palomar - green quasars in order to obtain measurements of thei... |
astro-ph9911476 | c | the luminosity relation is presented in fig . [ frvsl ] . the correlation coefficient is 0.827 , and its significance level is 1.7@xmath436 . a linear fit to the points gives @xmath437 ( solid line plotted in fig . [ frvsl ] ) . considering the seyfert nuclei ( @xmath438(5100 )@xmath439 ) , or the pg quasars alone , w... | seventeen of the 28 objects were observed with adequate sampling ( independent observing epochs ) to search for correlated variations between the balmer emission lines and the continuum flux . for each of these 17 objects , this determination of the scaling of the size of the blr as a function of luminosity is signific... | correlated variations in the line and continuum emission from active galactic nuclei ( agn ) can be used to determine the size and geometry of the broad emission line regions ( blrs ) . we have spectrophotometrically monitored a well - defined sample of 28 palomar - green quasars in order to obtain measurements of thei... |
astro-ph9911476 | i | spectrophotometric monitoring of a large , optically - selected quasar sample has shown clear correlations and well - defined time lags between the optical continuum and the balmer - line light curves . while the seyfert 1 galaxies that have been studied in this manner all have optical luminosities @xmath462 1.5@xmat... | our work increases the available luminosity range for studying the size luminosity relations in agn by two orders of magnitude and doubles the number of objects suitable for such studies . combining our results with comparable published data available for seyfert 1 galaxies , we find the blr size scales with the rest ... | correlated variations in the line and continuum emission from active galactic nuclei ( agn ) can be used to determine the size and geometry of the broad emission line regions ( blrs ) . we have spectrophotometrically monitored a well - defined sample of 28 palomar - green quasars in order to obtain measurements of thei... |
1004.0289 | i | crum s seminal paper of 1955 @xcite has played an essential role in elucidating the structure of one - dimensional quantum mechanical systems in general and exactly solvable ones , in particular . throughout this paper , we mean ` exact solvability ' in the schrdinger picture , namely a quantum system is exactly solved... | crum s theorem in one - dimensional quantum mechanics asserts the existence of an associated hamiltonian system for any given hamiltonian with the complete set of eigenvalues and eigenfunctions . the associated system is iso - spectral to the original one except for the lowest energy state , which is deleted . yukawa i... | crum s theorem in one - dimensional quantum mechanics asserts the existence of an associated hamiltonian system for any given hamiltonian with the complete set of eigenvalues and eigenfunctions . the associated system is iso - spectral to the original one except for the lowest energy state , which is deleted . a modifi... |
1112.1710 | i | the development of amr @xcite was meant to provide high resolution simulations for much lower computational cost than fixed grid methods would allow . the use of highly parallel systems and the algorithms that go with them were also meant to allow higher resolution simulations to be run faster ( relative to wall clock ... | this allows for global load balancing instead of level by level load balancing and allows for greater parallelization across both physical space and amr level . threading of level advances can also improve performance by interleaving communication with computation , especially in deep simulations with many levels of re... | current adaptive mesh refinement ( amr ) simulations require algorithms that are highly parallelized and manage memory efficiently . as compute engines grow larger , amr simulations will require algorithms that achieve new levels of efficient parallelization and memory management . we have attempted to employ new techn... |
astro-ph0011556 | r | the h@xmath2 , [ ] @xmath166583 , and [ ] @xmath166716 lines are detected up to nearly @xmath0 kpc on either side of the plane of ngc 4302 . the [ ] @xmath166716 line was not detected at @xmath22 kpc on the west side , though the fainter line at 6731 was detected , due to confusion with noise in that part of the spect... | emission lines are detected up to about kpc in ngc 4302 , and to nearly kpc on the north side of ugc 10288 . for both galaxies , the line ratios [ ] /h and [ ] /h increase with in accordance with dilute photo - ionization models . runs of [ ] / [ ] , and for ugc 10288 , the run of [ ] /h , however , are not explained b... | deep long - slit spectra of the diffuse ionized gas halos of the edge - on spiral galaxies ngc 4302 and ugc 10288 are presented . emission lines are detected up to about kpc in ngc 4302 , and to nearly kpc on the north side of ugc 10288 . for both galaxies , the line ratios [ ] /h and [ ] /h increase with in accordance... |
astro-ph0011556 | c | deep spectroscopy of four edge - on spiral galaxies has allowed physical conditions within their dig halos to be probed , and has provided information on possible sources of ionization of the gas . this study has revealed the following conclusions : \1 . the general trend for the runs of line ratios for ngc 4302 and... | models of line ratios in ngc 5775 require a greater contribution from shocks for filamentary regions than for non - filamentary regions to explain the run of [ ] /h . in either case , runs of [ ] /h , [ ] /h , and [ ] / [ ] in each of the four galaxies are consistent with such an increase . however , the runs of [ ] /h... | deep long - slit spectra of the diffuse ionized gas halos of the edge - on spiral galaxies ngc 4302 and ugc 10288 are presented . emission lines are detected up to about kpc in ngc 4302 , and to nearly kpc on the north side of ugc 10288 . for both galaxies , the line ratios [ ] /h and [ ] /h increase with in accordance... |
1609.04769 | i | in the last two decades , the study of quantum chromodynamics ( qcd ) bound states has evolved from static , one - dimensional snapshots of quarks and gluons to focus on multidimensional structure and the dynamics of partons . the theoretical framework that has been developed to describe parton dynamics in hadrons invo... | correlations of charged hadrons of gev/ with mesons of gev/ or isolated direct photons of gev/ are used to study nonperturbative effects generated by initial - state partonic transverse momentum and final - state transverse momentum from fragmentation . the nonperturbative behavior is characterized by measuring the out... | dihadron and isolated direct photon - hadron angular correlations are measured in collisions at gev . correlations of charged hadrons of gev/ with mesons of gev/ or isolated direct photons of gev/ are used to study nonperturbative effects generated by initial - state partonic transverse momentum and final - state trans... |
1609.04769 | i | dihadron and direct photon - hadron correlations sensitive to nonperturbative transverse momentum effects have been measured in the phenix experiment at rhic in @xmath34 gev @xmath33 collisions , motivated by the prediction of factorization breaking in such processes @xcite . correlations between @xmath32 or direct ph... | dihadron and isolated direct photon - hadron angular correlations are measured in collisions at gev . the widths are found to decrease with , which indicates that the collins - soper - sterman soft factor is not driving the evolution with the hard scale in nearly back - to - back dihadron and direct photon - hadron pro... | dihadron and isolated direct photon - hadron angular correlations are measured in collisions at gev . correlations of charged hadrons of gev/ with mesons of gev/ or isolated direct photons of gev/ are used to study nonperturbative effects generated by initial - state partonic transverse momentum and final - state trans... |
astro-ph0411663 | i | the optical depth of spiral disks has been the topic of many and varied studies since the claim by @xcite that they are transparent . the subject became controversial when @xcite and @xcite argued that disks were virtually opaque . at the cardiff meeting @xcite many possible methods to attack the problem were proposed ... | this paper presents the first results for a sample of 32 deep hst / wfpc2 archival fields of 29 spirals . the effects of inclination , spiral arms and hubble type on the radial extinction profile are discussed . these results are completely in agreement with earlier work on occulted galaxies . the early type spir... | dust extinction can be determined from the number of distant field galaxies seen through a spiral disk . to calibrate this number for the crowding and confusion introduced by the foreground image , and developed the `` synthetic field method '' ( sfm ) , which analyses synthetic fields constructed by adding various dee... |
cond-mat0005412 | i | linked cluster expansions ( lces ) have a long tradition in statistical physics . originally applied to classical fluids , later to magnetic systems ( @xcite,@xcite,@xcite and references therein ) , they were generalized to applications in particle physics in the eighties @xcite . there they have been used to study the... | dynamical linked cluster expansions are linked cluster expansions with hopping parameter terms endowed with their own dynamics . this amounts to a generalization from 2-point to point - link - point interactions . an associated graph theory with a generalized notion of connectivity is reviewed . dynamical linked cl... | dynamical linked cluster expansions are linked cluster expansions with hopping parameter terms endowed with their own dynamics . this amounts to a generalization from 2-point to point - link - point interactions . an associated graph theory with a generalized notion of connectivity is reviewed . we discuss physical app... |
astro-ph0507219 | i | observations and numerical modeling of galactic stellar bars have been frequently accompanied with basic controversies about their origin and evolution . while modern understanding of bar growth in a live and responsive environment is rooted in the angular momentum redistribution between the inner and outer disks , bul... | evolution of stellar bars in disk galaxies is accompanied by dynamical instabilities and secular changes . following the vertical buckling instability , the bars are known to weaken dramatically and develop a pronounced boxy / peanut shape when observed edge - on . using high - resolution-body simulations of stellar di... | evolution of stellar bars in disk galaxies is accompanied by dynamical instabilities and secular changes . following the vertical buckling instability , the bars are known to weaken dramatically and develop a pronounced boxy / peanut shape when observed edge - on . using high - resolution-body simulations of stellar di... |
astro-ph0507219 | c | to summarize this work , we have studied the long - term stellar bar evolution in a high - resolution self - consistent model of a disk and a responsive halo . we find that a developing bar goes through the vertical buckling instability which weakens it and dissolves its outer half . subsequently , the bar experiences ... | we also find that this secular bar growth triggers a spectacular _ secondary _ vertical buckling instability which leads to the appearance of characteristic boxy / peanut / x - shaped bulges . furthermore , the secondary buckling is milder , persists over a substantial period of time , gyr , and can have observational... | evolution of stellar bars in disk galaxies is accompanied by dynamical instabilities and secular changes . following the vertical buckling instability , the bars are known to weaken dramatically and develop a pronounced boxy / peanut shape when observed edge - on . using high - resolution-body simulations of stellar di... |
astro-ph0112113 | c | it has been clearly shown that , contrary to the belief expressed in many papers and recently by @xcite , atomic diffusion does not necessarily lead to underabundances of metals in pop ii stars . differential radiative accelerations lead to overabundances of fe and some other chemical elements in some turnoff stars . c... | the effects of radiative accelerations , thermal diffusion and gravitational settling are included . while models were calculated both for and , we concentrate on models with in this paper . it is shown that , as in the case of pop i stars , additional turbulence appears to be present . one series minimizes the spre... | evolutionary models have been calculated for pop ii stars of 0.5 to 1.0 from the pre - main sequence to the lower part of the giant branch . rosseland opacities and radiative accelerations were calculated taking into account the concentration variations of 28 chemical species , including all species contributing to ro... |
astro-ph9910098 | i | this study uses fuv , hi , and h@xmath0 observations of dwarf irregular galaxy hoii to trace the interaction between sites of massive star formation and the neutral and ionized components of the surrounding ism and to identify the means by which star formation propagates in this intrinsically simple system . both local... | the observations trace the interaction between sites of massive star formation and the neutral and ionized components of the surrounding ism in this intrinsically simple system . both local and large - scale triggering mechanisms related to massive star formation are seen , suggesting that feedback from massive stars i... | far - ultraviolet ( fuv ) , h , and hi observations of dwarf galaxy holmberg ii are used to investigate the means by which star formation propagates in galaxies lacking global internal triggering mechanisms such as spiral density waves . the observations trace the interaction between sites of massive star formation an... |
astro-ph0310158 | r | figure [ all ] shows from top to bottom the integral tev flux , the x - ray flux at 10 kev , the 3 - 20 kev x - ray photon index , the v , r , and i band optical data , and the 14.5 ghz and 4.8 ghz radio data . the tev @xmath0-ray data ( fig . [ all]a ) show several strong flares during the first 20 days of the campaig... | -ray telescopes revealed several strong flares , enabling us to sensitively test the x - ray/-ray flux correlation properties . although the x - ray and-ray fluxes seemed to be correlated in general , we found an `` orphan ''-ray flare that was not accompanied by an x - ray flare . while we detected optical flux variab... | following the detection of strong tev-ray flares from the bl lac object 1es 1959 + 650 with the whipple 10 m cherenkov telescope on may 16 and 17 , 2002 , we performed intensive target of opportunity ( too ) radio , optical , x - ray and tev-ray observations from may 18 , 2002 to august 14 , 2002 . observations with ... |
1607.06848 | i | for @xmath0 , let @xmath1 denote the infinite sector of opening @xmath2 , @xmath21 in the present paper , we are interested in the spectral properties of the associated robin laplacian , to be denoted @xmath4 , which is defined as follows : for @xmath9 , the operator @xmath4 acts in @xmath5 as @xmath22 on the functions... | for , let denote the infinite planar sector of opening , and be the laplacian in , , with the robin boundary condition , where stands for the outer normal derivative and . the essential spectrum of does not depend on the angle and equals , and the discrete spectrum is non - empty iff . in this case we show that the dis... | for , let denote the infinite planar sector of opening , and be the laplacian in , , with the robin boundary condition , where stands for the outer normal derivative and . the essential spectrum of does not depend on the angle and equals , and the discrete spectrum is non - empty iff . in this case we show that the dis... |
1006.5928 | i | for a polytope @xmath6 of dimension @xmath4 , the _ face vector _ of @xmath6 is given by @xmath7 where @xmath8 is the number of @xmath9-dimensional faces of @xmath6 . it is an ongoing investigation to describe the face vectors for @xmath4-dimensional convex polytopes . the case @xmath10 are the only cases where this de... | where . the flag polynomial facilitates many direct computations . to demonstrate this we provide two examples we then compute the maximum discrepancy between the number of-chains of faces of a minkowski sum of two simplices and the number of such chains of faces of a simple polytope of the same dimension and on the s... | for a polytope we define the _ flag polynomial _ , a polynomial in commuting variables related to the well - known flag vector and describe how to express the the flag polynomial of the minkowski sum of standard simplices in a direct and canonical way in terms of the _-th master polytope _ where . the flag polynomial ... |
0909.0319 | i | courant algebroids were introduced in @xcite as a way to merge the concept of lie bialgebra and the bracket on @xmath4 first discovered by courant @xcite here @xmath5 is a smooth manifold . roytenberg gave an equivalent definition phrased in terms of the dorfman bracket @xcite , which highlighted the relation of co... | this intrinsic invariant of the courant algebroid is a degree- class in its naive cohomology . when the courant algebroid is exact , it reduces to the evera class ( in ) . on the other hand , when the courant algebroid is a quadratic lie algebra , it coincides with the class of the cartan-form ( in ) . we also give a c... | for any regular courant algebroid , we construct a characteristic class _ la _ chern - weil . this intrinsic invariant of the courant algebroid is a degree- class in its naive cohomology . when the courant algebroid is exact , it reduces to the evera class ( in ) . on the other hand , when the courant algebroid is a q... |
1209.2225 | i | x - ray spectroscopy @xcite is a powerful spectroscopic tool for the elucidation of structural and electronic properties of materials @xcite and ( bio-)molecular systems@xcite . x - ray absorption spectroscopy ( xas ) probes the excitation of core electrons . here , one distinguishes excitations to low - lying unoccupi... | for electronic excitations in the ultraviolet and visible range of the electromagnetic spectrum , the intensities are usually calculated within the dipole approximation , which assumes that the oscillating electric field is constant over the length scale of the transition . for the short wavelengths used in hard x - ra... | for electronic excitations in the ultraviolet and visible range of the electromagnetic spectrum , the intensities are usually calculated within the dipole approximation , which assumes that the oscillating electric field is constant over the length scale of the transition . for the short wavelengths used in hard x - ra... |
1209.2225 | r | to illustrate the origin - independent calculation of quadrupole intensities in x - ray absorption spectroscopy ( xas ) using the theory derived above and to verify our implementation , we consider two test cases . as the first example , we use titaniumtetrachloride ticl@xmath162 ( see fig . [ fig : mol]a for the mole... | * origin - independent calculation of quadrupole intensities in x - ray spectroscopy + * stephan bernadotte , andrew j. atkins , and christoph r. jacob , + karlsruhe institute of technology ( kit ) , + center for functional nanostructures and institute of physical chemistry , + wolfgang - gaede - str . | for electronic excitations in the ultraviolet and visible range of the electromagnetic spectrum , the intensities are usually calculated within the dipole approximation , which assumes that the oscillating electric field is constant over the length scale of the transition . for the short wavelengths used in hard x - ra... |
1209.2225 | c | we have derived origin - independent expressions for calculating xas intensities beyond the dipole approximation . in particular , we have shown that for a consistent formulation , it is necessary to retain all contributions to the oscillator strengths that are of the same order in the wave vector . this differs from t... | this leads to two additional contributions depending on products of the electric - dipole andelectric - octupole and of the electric - dipole and magnetic - quadrupole transition moments , respectively . we have implemented such an origin - independent calculation of quadrupole intensities in xas within time - dependen... | for electronic excitations in the ultraviolet and visible range of the electromagnetic spectrum , the intensities are usually calculated within the dipole approximation , which assumes that the oscillating electric field is constant over the length scale of the transition . for the short wavelengths used in hard x - ra... |
1404.0573 | i | we begin by fixing some notation . we assume throughout the paper that @xmath0 is a closed orientable surface of genus @xmath1 . on @xmath0 , there exists a ( hyperbolic ) riemannian metric @xmath2 of constant curvature @xmath3 . the riemannian universal cover of @xmath0 , denoted by @xmath4 , is identified with the po... | for finsler metrics ( no reversibility assumed ) on closed orientable surfaces of genus greater than one , we study the dynamics of minimal rays and minimal geodesics in the universal cover . we prove in particular , that for almost all asymptotic directions the minimal rays with these directions laminate the universal... | for finsler metrics ( no reversibility assumed ) on closed orientable surfaces of genus greater than one , we study the dynamics of minimal rays and minimal geodesics in the universal cover . we prove in particular , that for almost all asymptotic directions the minimal rays with these directions laminate the universal... |
cond-mat0402360 | i | a powerful approach to the quantum many - body problem is density functional theory . hohenberg and kohn @xcite showed that the ( nondegenerate ) ground state of a system of interacting particles is a unique function of the corresponding ground state density @xmath2 . the ground state of the system is thus fully charac... | for hole systems with an effective spin , we present an invariant decomposition of the spin density matrix that can be interpreted as a multipole expansion . the charge density corresponds to the monopole moment and the spin polarization due to a magnetic field corresponds to a dipole moment while heavy hole light hol... | for hole systems with an effective spin , we present an invariant decomposition of the spin density matrix that can be interpreted as a multipole expansion . the charge density corresponds to the monopole moment and the spin polarization due to a magnetic field corresponds to a dipole moment while heavy hole light hol... |
1409.8459 | c | in this paper , we have proposed a simple generalization in @xmath1 of the self - dual block renormalization procedure of fernandez - pacheco @xcite , that we have tested for pure and random quantum ising models , with the following conclusions . for the pure models , where the fernandez - pacheco procedure is known... | for the quantum ising chain , the self - dual block renormalization procedure of fernandez - pacheco [ phys . rev . d 19 , 3173 ( 1979 ) ] is known to reproduce exactly the location of the zero - temperature critical point and the correlation length exponent . e 87 , 032154 ( 2013 ) ] have proposed to study the disorde... | for the quantum ising chain , the self - dual block renormalization procedure of fernandez - pacheco [ phys . rev . d 19 , 3173 ( 1979 ) ] is known to reproduce exactly the location of the zero - temperature critical point and the correlation length exponent . recently , miyazaki and nishimori [ phys . rev . e 87 , 032... |
1601.00203 | i | gromov - witten theory has a rich history , both in physics and mathematics . physically , gromov - witten invariants appear in type iia topological string theory as instanton counts associated to interactions between particles . mathematically , they are invariants associated to symplectic manifolds that , roughly spe... | , these disk factors can often be expressed in terms of gamma classes . we verify that this formula encodes the expected invariants obtained from localization by comparing with several examples . we then examine a novel application of this formula to disk enumeration on the quintic 3-fold . finally , motivated by large... | for toric calabi - yau 3-folds , open gromov - witten invariants associated to riemann surfaces with one boundary component can be written as the product of a disk factor and a closed invariant . using the brini - cavalieri - ross formalism , these disk factors can often be expressed in terms of gamma classes . when th... |
1305.0980 | m | the evolutionary calculations for giant planets are started at the point where the heavy - element core has a mass of about 1 m@xmath0 , and are carried through the entire formation process as well as the subsequent contraction / cooling phase at constant mass , up to a final age of several gyr . the assumptions and c... | after the formation process , which lasts 15 myr and which ends with a ` cold - start ' , low - entropy configuration , the bodies evolve at constant mass up to an age of several gyr . deuterium burning via proton capture is included in the calculation , and we determined the mass , , above which more than 50% of the i... | formation of bodies near the deuterium - burning limit is considered by detailed numerical simulations according to the core - nucleated giant planet accretion scenario . the objects , with heavy - element cores in the range 530 m , are assumed to accrete gas up to final masses of 1015 jupiter masses ( m ) . after the... |
1305.0980 | r | a recent paper on deuterium burning in objects formed through the core - accretion scenario @xcite considered the basic case of a body forming at 5.2 au in a disk around a 1 m@xmath11 star with a solid surface density of @xmath128 and @xmath129 k. their study compared results obtained by varying the following paramet... | are assumed to accrete gas up to final masses of 1015 jupiter masses ( m ) . this often - quoted borderline between giant planets and brown dwarfs is found to depend only slightly on parameters , such as core mass , stellar mass , formation location , solid surface density in the protoplanetary disk , disk viscosity , ... | formation of bodies near the deuterium - burning limit is considered by detailed numerical simulations according to the core - nucleated giant planet accretion scenario . the objects , with heavy - element cores in the range 530 m , are assumed to accrete gas up to final masses of 1015 jupiter masses ( m ) . after the... |
1305.0980 | i | we investigate the boundary between brown dwarfs and giant planets , according to the definition that brown dwarfs can burn the deuterium that is present when they form , and giant planets can not . the main parameters and the results for @xmath2 , the boundary mass at which half of the original deuterium is burned aft... | the values for fall in the range 11.613.6 m , in agreement with previous determinations that do not take the formation process into account . for a given opacity law during the formation process , objects with higher core masses form more quickly . evolutionary tracks in the luminosity versus time diagram are compar... | formation of bodies near the deuterium - burning limit is considered by detailed numerical simulations according to the core - nucleated giant planet accretion scenario . the objects , with heavy - element cores in the range 530 m , are assumed to accrete gas up to final masses of 1015 jupiter masses ( m ) . after the... |
1007.0690 | i | temporal data mining is concerned with finitely many useful patterns in sequential ( symbolic ) data streams @xcite . frequent episode discovery , first introduced in @xcite , is a popular framework for mining patterns from sequential data . the framework has been successfully used in many application domains , e.g. , ... | frequent episode discovery framework is a popular framework in temporal data mining with many applications . over the years many different notions of frequencies of episodes have been proposed along with different algorithms for episode discovery . in this paper we present a unified view of all such frequency counting ... | frequent episode discovery framework is a popular framework in temporal data mining with many applications . over the years many different notions of frequencies of episodes have been proposed along with different algorithms for episode discovery . in this paper we present a unified view of all such frequency counting ... |
astro-ph0610481 | i | the origin of ultrahigh energy cosmic rays ( uhecr ) is one of the great remaining mysteries in astrophysics @xcite . the cosmic - ray spectrum has been measured to beyond @xmath1 ev , with a number of events with energy exceeding @xmath2 ev @xcite ; however , it is still debated how such highly energetic particles... | several implications follow from these findings . this necessarily leads , through the gzk process , to an enhancement in the flux of cosmogenic neutrinos , providing a near - term approach for testing the gamma - ray burst cosmic ray connection with ongoing and proposed uhe neutrino experiments . | gamma - ray bursts , which are among the most violent events in the universe , are one of the few viable candidates to produce ultrahigh energy cosmic rays . recently , observations have revealed that grbs generally originate from metal - poor , low - luminosity galaxies and do not directly trace cosmic star formation ... |
astro-ph0610481 | c | the increase in our understanding of gamma - ray bursts can be traced to the improved capabilities now available to study these phenomena . the ability to quickly and accurately localize a grb has led to the establishment of a grb - supernova connection and allowed for the study of the host galaxies in which these even... | recently , observations have revealed that grbs generally originate from metal - poor , low - luminosity galaxies and do not directly trace cosmic star formation , as might have been assumed from their association with core - collapse supernovae . the redshift distribution of observed grbs is expected to peak at higher... | gamma - ray bursts , which are among the most violent events in the universe , are one of the few viable candidates to produce ultrahigh energy cosmic rays . recently , observations have revealed that grbs generally originate from metal - poor , low - luminosity galaxies and do not directly trace cosmic star formation ... |
1507.00067 | i | the theory of combinatorial limits has recently attracted a significant amount of attention . this line of research was sparked by limits of dense graphs @xcite , which we focus on here , followed by limits of other structures , e.g. permutations @xcite , sparse graphs @xcite and partial orders @xcite . methods re... | lovsz and szegedy conjectured that every finitely forcible graphon , i.e. any graphon determined by finitely many subgraph densities , has a simple structure . we construct a finitely forcible graphon such that the number of parts in any weak-regular partition of is at least exponential in . this bound almost matches ... | graphons are analytic objects representing limits of convergent sequences of graphs . lovsz and szegedy conjectured that every finitely forcible graphon , i.e. any graphon determined by finitely many subgraph densities , has a simple structure . in particular , one of their conjectures would imply that every finitely ... |
0812.2630 | i | recently , aqueous solution surfaces of simple electrolytes have attracted much attention for its importance in the broad chemical , environmental and biological processes at the molecular interfaces and membranes.@xcite conventionally , it has been widely believed that the aqueous solution surfaces were empty of ions ... | here we report the polarization dependent non - resonant second harmonic generation ( shg ) measurement of the interfacial water molecules at the aqueous solution of the following salts : naf , nacl , nabr , kf , kcl , and kbr . through quantitative polarization analysis of the shg data , the orientational parameter d,... | here we report the polarization dependent non - resonant second harmonic generation ( shg ) measurement of the interfacial water molecules at the aqueous solution of the following salts : naf , nacl , nabr , kf , kcl , and kbr . through quantitative polarization analysis of the shg data , the orientational parameter d,... |
1212.4807 | i | since the realization of bose - einstein condensates ( becs ) in 1995 @xcite , there was a significant interest about effects of the disordered potentials on the properties of ultracold quantum gases @xcite . the reason for this is not only because of the unavoidable irregularities in the trapping potential induced by ... | here we study properties of a homogeneous dipolar bose - einstein condensate in a weak anisotropic random potential with lorentzian correlation at zero temperature . to this end we solve perturbatively the gross - pitaevskii equation to second order in the random potential strength and obtain analytic results for the d... | here we study properties of a homogeneous dipolar bose - einstein condensate in a weak anisotropic random potential with lorentzian correlation at zero temperature . to this end we solve perturbatively the gross - pitaevskii equation to second order in the random potential strength and obtain analytic results for the d... |
1610.06413 | i | a common practice to provide lifetime enhancement against fatigue and stress - corrosion cracking of metallic parts ( e.g. , critical components of aircraft engines , welds in steel structures , etc . ) is to impart , through surface - conditioning treatments such as shot peening , sand blasting , laser peening , and l... | our solution of this inverse problem is based on a recently developed algorithm by which each term of a high - frequency asymptotic formula for dispersion relations can be computed for rayleigh waves that propagate in various directions along the free surface of a vertically - inhomogeneous , prestressed , and weakly a... | herein we study the inverse problem on inferring depth profile of near - surface residual stress in a weakly anisotropic medium by boundary measurement of rayleigh - wave dispersion if all other relevant material parameters of the elastic medium are known . our solution of this inverse problem is based on a recently de... |
1408.4323 | i | the general catalog of variable stars lists multiple groups of pulsating variable stars of late spectral type with periods of several tens of days or longer . while historical divisions by period and spectral type were made in the absence of knowledge about stellar evolution , we now recognize that these long period va... | photometry for a small sample of nine sr agb stars are examined using a 30 minute cadence over a period of 45 months . while undergoing long period variations of many magnitudes , the light curves are shown to be smooth at the millimagnitude level over much shorter time intervals . the light curves were all well repres... | high precision kepler photometry is used to explore the details of agb light curves . since agb variability has a typical time scale on order of a year we discuss at length the removal of long term trends and quarterly changes in kepler data . photometry for a small sample of nine sr agb stars are examined using a 30 m... |
gr-qc0311004 | i | since observations show that space is homogeneous at large scales to a very good approximation , homogeneous models have been studied for many decades in classical and quantum cosmology @xcite . they provide insights into the behavior of our universe while avoiding all the complicated field theoretic details of full gr... | a quantization of the corresponding hamiltonian constraints is presented and shown to lead to a locally stable , non - singular evolution compatible with almost classical behavior at large volume . as an application , the bianchi ix model and its modified behavior close to its classical singularity is explored . | homogeneous cosmological models with non - vanishing intrinsic curvature require a special treatment when they are quantized with loop quantum cosmological methods . guidance from the full theory which is lost in this context can be replaced by two criteria for an acceptable quantization , admissibility of a continuum ... |
gr-qc0311004 | c | in this paper we have extended the methods of homogeneous loop quantum cosmology to models with non - zero spin connection . these models have non - trivial intrinsic curvature from the symmetric background which requires a special treatment compared to the bianchi i model as well as compared to the full theory . initi... | homogeneous cosmological models with non - vanishing intrinsic curvature require a special treatment when they are quantized with loop quantum cosmological methods . guidance from the full theory which is lost in this context can be replaced by two criteria for an acceptable quantization , admissibility of a continuum ... | homogeneous cosmological models with non - vanishing intrinsic curvature require a special treatment when they are quantized with loop quantum cosmological methods . guidance from the full theory which is lost in this context can be replaced by two criteria for an acceptable quantization , admissibility of a continuum ... |
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