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1307.3566 | i | the lhc experiments have discovered a standard model ( sm)-like higgs boson with @xmath11 gev @xcite . however , it is not clear whether this newly discovered particle is a pure sm higgs boson , or whether it is part of an extension of the sm , which might also include multiple or composite higgs - like states . prec... | such light , and states can be almost mass degenerate , and their decays are then difficult to observe at colliders . we perform a parameter fit in the mssm , from which we infer that the higgsino mass parameter can be measured to a precision of about gev . for the electroweak gaugino mass parameters , , which are cho... | in supersymmetric extensions of the standard model , higgsino - like charginos and neutralinos are preferred to have masses of the order of the electroweak scale by naturalness arguments . such light , and states can be almost mass degenerate , and their decays are then difficult to observe at colliders . in addition t... |
1301.7692 | i | warped extra dimensional models have become very popular because they are able to address simultaneously two intriguing issues within the standard model ( sm ) : the hierarchy problem and the mass / flavor problem . they were originally introduced to treat the first issue @xcite in a setup where the sm fields were all ... | in the context of warped extra - dimensional models with all fields propagating in the bulk , we address the phenomenology of a bulk scalar higgs boson , and calculate its production cross section at the lhc as well as its tree - level effects on mediating flavor changing neutral currents . | in the context of warped extra - dimensional models with all fields propagating in the bulk , we address the phenomenology of a bulk scalar higgs boson , and calculate its production cross section at the lhc as well as its tree - level effects on mediating flavor changing neutral currents . we perform the calculations ... |
1301.7692 | c | in this work we have presented the results for the predictions of higgs phenomenology in a toy - model rs setup in which the higgs field is allowed to propagate in the bulk and with a single 5d fermion field . our results can be extended to three families to include full flavor effects , but the generic predictions tha... | first , we compute our predictions analytically by considering all the degrees of freedom emerging from the dimensional reduction ( the infinite tower of kaluza klein modes ( kk ) ) . in the second approach it is necessary to introduce a type of higher derivative operator which essentially encodes the effects of integr... | in the context of warped extra - dimensional models with all fields propagating in the bulk , we address the phenomenology of a bulk scalar higgs boson , and calculate its production cross section at the lhc as well as its tree - level effects on mediating flavor changing neutral currents . we perform the calculations ... |
1006.4489 | i | although the standard single - degenerate ( sd ) chandrasekhar - mass scenario ( see @xcite for a review ) is capable of explaining most of the observed diversity of type ia supernovae ( sne ia ) @xcite via the delayed - detonation @xcite model , it suffers from severe problems in explaining the observed rate of sne ... | this shell detonation drives a shock front into the carbon - oxygen white dwarf that triggers a secondary detonation in the core . recently , however , it was proposed that detonations might be possible for much less massive helium shells than previously assumed . moreover , it was shown that even detonations of these ... | in the double detonation scenario for type ia supernovae it is suggested that a detonation initiates in a shell of helium - rich material accreted from a companion star by a sub - chandrasekhar - mass white dwarf . this shell detonation drives a shock front into the carbon - oxygen white dwarf that triggers a secondary... |
1006.4489 | c | in the last section we presented synthetic observables for the sub - chandrasekhar - mass double detonation models with minimum helium shell mass of @xcite . compared to observed sne ia , these models show some promising features : 1 . they predict a wide range of brightnesses that covers the whole range of observe... | we show that this discrepancy is mainly due to the composition of the burning products of the helium shell of the models which contain significant amounts of titanium and chromium . using a toy model , we also show that the burning products of the helium shell depend crucially on its initial composition . | in the double detonation scenario for type ia supernovae it is suggested that a detonation initiates in a shell of helium - rich material accreted from a companion star by a sub - chandrasekhar - mass white dwarf . this shell detonation drives a shock front into the carbon - oxygen white dwarf that triggers a secondary... |
1006.4489 | c | in this paper we presented synthetic observables for the sub - chandrasekhar - mass double detonation models of @xcite . we found that these models predict light curves which rise and fade on time - scales typical of sne ia . moreover , they produce a large range of brightnesses which covers the whole range of observe... | in the double detonation scenario for type ia supernovae it is suggested that a detonation initiates in a shell of helium - rich material accreted from a companion star by a sub - chandrasekhar - mass white dwarf . earlier studies concluded that this scenario has difficulties in accounting for the observed properties o... | in the double detonation scenario for type ia supernovae it is suggested that a detonation initiates in a shell of helium - rich material accreted from a companion star by a sub - chandrasekhar - mass white dwarf . this shell detonation drives a shock front into the carbon - oxygen white dwarf that triggers a secondary... |
1110.3878 | c | in the horndeski s most general scalar - tensor theories we derived conditions for the avoidance of ghosts and laplacian instabilities associated with scalar , tensor , and vector perturbations . the four conditions ( [ qscon ] ) , ( [ cscon ] ) , ( [ qtcon ] ) , and ( [ ctcon ] ) need to be satisfied for the theoretic... | in the horndeski s most general scalar - tensor theories with second - order field equations , we derive the conditions for the avoidance of ghosts and laplacian instabilities associated with scalar , tensor , and vector perturbations in the presence of two perfect fluids on the flat friedmann - lematre - robertson - w... | in the horndeski s most general scalar - tensor theories with second - order field equations , we derive the conditions for the avoidance of ghosts and laplacian instabilities associated with scalar , tensor , and vector perturbations in the presence of two perfect fluids on the flat friedmann - lematre - robertson - w... |
1402.1626 | i | _ `` lesson : if you are stupid , do nt get discouraged but try a different way to get the result . '' _ + madan lal mehta the recent developments in the study of @xmath1 susy gauge theories in four dimensions have driven a lot of progress in several fields of theoretical physics . this is particularly the case for ... | this class is directly relevant to nekrasov partition functions of susy gauge theories on the 4d-background , for which is identified with one of the equivariant deformation parameter . in the nekrasov - shatashvili limit , we show that the free energy is given by an on - shell effective action . the equations of motio... | in these notes , we study a class of grand - canonical partition functions with a kernel depending on a small parameter . this class is directly relevant to nekrasov partition functions of susy gauge theories on the 4d-background , for which is identified with one of the equivariant deformation parameter . in the nekra... |
1510.01607 | i | in this article , we introduce and investigate a class of finite deterministic automata that recognize the language @xmath1 of reduced words of a finitely generated coxeter system @xmath0 . the definition of these automata is straightforward , requiring only the notion of _ ( right ) weak order @xmath2 _ on @xmath0 @x... | in this article , we introduce and investigate a class of finite deterministic automata that all recognize the language of reduced words of a finitely generated coxeter system . the definition of these automata is straightforward as it only requires the notion of _ weak order _ on and the related notion of _ garside sh... | in this article , we introduce and investigate a class of finite deterministic automata that all recognize the language of reduced words of a finitely generated coxeter system . the definition of these automata is straightforward as it only requires the notion of _ weak order _ on and the related notion of _ garside sh... |
1410.4351 | i | control of fluid flow has been an important area of research and has many practical applications . the question about controllability of fluid flows has attracted the attention of many researchers , more for incompressible flow but much less for compressible flow . in this paper we are interested in controllability pro... | in this article , we study the null controllability of linearized compressible navier - stokes system in one and two dimension . we first study the one - dimensional compressible navier - stokes system for non - barotropic fluid linearized around a constant steady state . we prove that the linearized system around , wi... | in this article , we study the null controllability of linearized compressible navier - stokes system in one and two dimension . we first study the one - dimensional compressible navier - stokes system for non - barotropic fluid linearized around a constant steady state . we prove that the linearized system around , wi... |
1111.2398 | i | [ [ section ] ] let @xmath6 be a bounded and connected domain in @xmath7 with a smooth boundary . we are going to define a perforated domain @xmath8 by removing a @xmath1-periodic balls out of @xmath6 . for each @xmath9 , let @xmath10 be a ball with center @xmath11 and radius @xmath12 . let @xmath13 and @xmath14 ... | in this paper , we consider periodic soft inclusions with periodicity , where the solution , , satisfies semi - linear elliptic equations of non - divergence in with a neumann data on . the difficulty lies in the non - divergence structure of the operator where the standard energy method based on the divergence theorem... | in this paper , we consider periodic soft inclusions with periodicity , where the solution , , satisfies semi - linear elliptic equations of non - divergence in with a neumann data on . the difficulty lies in the non - divergence structure of the operator where the standard energy method based on the divergence theorem... |
1304.6839 | i | a natural definition for the laplacian tensor and the signless laplacian tensor of a @xmath0-uniform hypergraph for @xmath3 was introduced in @xcite . see definition 2.2 of this paper . recently , hu , qi and xie @xcite studied the largest laplacian and signless laplacian eigenvalues of a @xmath0-uniform hypergraph , a... | in this paper , we introduce the class of cored hypergraphs and power hypergraphs , and investigate the properties of their laplacian h - eigenvalues . from an ordinary graph , one may generate a-uniform hypergraph , called theth power hypergraph of that graph . power hypergraphs are cored hypergraphs , but not vice ve... | in this paper , we introduce the class of cored hypergraphs and power hypergraphs , and investigate the properties of their laplacian h - eigenvalues . from an ordinary graph , one may generate a-uniform hypergraph , called theth power hypergraph of that graph . power hypergraphs are cored hypergraphs , but not vice ve... |
1410.6961 | i | in this paper , we establish uniqueness of small solutions to the three - dimensional quintic gross - pitaevskii ( gp ) hierarchy in the scaling - critical sobolev type space . the 3d quintic gp hierarchy is an infinite system of coupled linear equations @xmath2 where @xmath3 , the underlined variables @xmath4 and @xma... | in this paper , we study solutions to the three - dimensional quintic gross - pitaevskii hierarchy . we prove unconditional uniqueness among all small solutions in the critical space ( which corresponds to on the nls level ) . with slight modifications to the proof , we also prove unconditional uniqueness of solutions ... | in this paper , we study solutions to the three - dimensional quintic gross - pitaevskii hierarchy . we prove unconditional uniqueness among all small solutions in the critical space ( which corresponds to on the nls level ) . with slight modifications to the proof , we also prove unconditional uniqueness of solutions ... |
1303.6437 | i | the * traveling salesman problem ( tsp ) * is one of the best known and most fundamental problems in combinatorial optimization . determining how well it can be approximated in polynomial time is therefore a major open problem , albeit one for which the solution still seems elusive . on the algorithmic side , the best ... | the best up to now known hardness of approximation bounds were for the symmetric case ( due to lampis ) and for the asymmetric case ( due to papadimitriou and vempala ) . we construct here two new bounded occurrence csp reductions which improve these bounds to and , respectively . the latter bound is the first improvem... | in this paper , we study the approximability of the metric traveling salesman problem ( tsp ) and prove new explicit inapproximability bounds for that problem . the best up to now known hardness of approximation bounds were for the symmetric case ( due to lampis ) and for the asymmetric case ( due to papadimitriou and ... |
1510.06263 | i | the problem of simultaneous localization and mapping ( slam ) has a rich history over the past two decades , which is too broad to cover here , see e.g. @xcite . the extended kalman filter ( ekf ) based slam ( the ekf - slam ) has played an important historical role , and is still used , notably for its ability to clos... | in this paper we address the inconsistency of the ekf - based slam algorithm that stems from non - observability of the origin and orientation of the global reference frame . we prove on the non - linear two - dimensional problem with point landmarks observed that this type of inconsistency is remedied using the invari... | in this paper we address the inconsistency of the ekf - based slam algorithm that stems from non - observability of the origin and orientation of the global reference frame . we prove on the non - linear two - dimensional problem with point landmarks observed that this type of inconsistency is remedied using the invari... |
1408.0110 | i | a polling model is a single - server system in which the server visits @xmath0 queues @xmath1 in cyclic order . customers that arrive at @xmath2 are referred to as type @xmath3 customers . the special feature of the model considered in the present paper is that , within a customer type , we distinguish high and low pri... | we study the cycle time distribution , the waiting times for each customer type , the joint queue length distribution at polling epochs , and the steady - state marginal queue length distributions for each customer type . * keywords : * polling , priority levels , queue lengths , waiting times | in this paper we consider a single - server cyclic polling system consisting of two queues . between visits to successive queues , the server is delayed by a random switch - over time . two types of customers arrive at the first queue : high and low priority customers . for this situation the following service discipli... |
1406.7649 | i | we have derived and modelled distributions of dust and metals in the disc of m31 with the purpose of finding indirect evidence to hopefully distinguish between one of the two competing dust production mechanisms in late - type galaxies : stellar dust production and interstellar grain growth . the data together with sim... | we derive mean radial dust distributions using a dust map created from _ modified blackbodies are fit to approximately 4000 pixels with a varying , as well as a fixed , dust emissivity index ( ) . an overall metal distribution is also derived using data collected from the literature . we use a simple analytical model o... | in this paper we consider the implications of the distributions of dust and metals in the disc of m31 . we derive mean radial dust distributions using a dust map created from _ herschel _ images of m31 sampling the entire far - infrared peak . modified blackbodies are fit to approximately 4000 pixels with a varying , a... |
1305.5391 | i | the ricci flow , introduced by hamilton , is a geometric flow for metrics on @xmath0-manifolds , and has played a decisive role in the proof of the poincar conjecture and thurston s geometrization conjecture for @xmath1-manifolds . it is natural to then investigate a corresponding problem for contact @xmath1-manifolds ... | in this paper we define the torsion flow , a cr analogue of the ricci flow . for homogeneous cr manifolds we give explicit solutions to the torsion flow illustrating various kinds of behavior . we also derive monotonicity formulas for cr entropy functionals . as an application , we classify torsion breathers . | in this paper we define the torsion flow , a cr analogue of the ricci flow . for homogeneous cr manifolds we give explicit solutions to the torsion flow illustrating various kinds of behavior . we also derive monotonicity formulas for cr entropy functionals . as an application , we classify torsion breathers . |
1007.1655 | i | in this note we complete the work begun in the sequence of papers @xcite , @xcite-@xcite about equilateral triangles , regular tetrahedra , cubes , and regular octahedrons all with vertices having integer coordinates . very often we will refer to this property by saying that the various objects are in @xmath1 . strictl... | in this paper we describe a procedure for calculating the number of regular octahedrons that have vertices with coordinates in the set . as a result we adapt the method appeared in which was used to find the number of regular tetrahedra with coordinates of their vertices in . [ section ] [ theorem ] proposition [ theor... | in this paper we describe a procedure for calculating the number of regular octahedrons that have vertices with coordinates in the set . as a result , we introduce a new sequence in _ the online encyclopedia of integer sequences _ ( a178797 ) and list the first one hundred terms of it . we adapt the method appeared in ... |
astro-ph0001140 | c | in this paper we describe the nog sample , a distance - limited ( @xmath386000 km / s ) and magnitude - limited ( b@xmath114 mag ) sample of 7076 optically - selected galaxies which covers 2/3 of the sky ( @xmath3 ) and has a good completeness in redshift ( 98% ) . we select the nog on the basis of homogenized correcte... | in this paper we describe the nearby optical galaxy ( nog ) sample , which is a complete , distance - limited ( km / s ) and magnitude - limited ( b ) sample of optical galaxies . the sample covers 2/3 ( 8.27 sr ) of the sky ( ) and appears to have a good completeness in redshift ( 98% ) . we select the sample on the b... | in this paper we describe the nearby optical galaxy ( nog ) sample , which is a complete , distance - limited ( km / s ) and magnitude - limited ( b ) sample of optical galaxies . the sample covers 2/3 ( 8.27 sr ) of the sky ( ) and appears to have a good completeness in redshift ( 98% ) . we select the sample on the b... |
1701.05750 | i | bouncing cosmologies , in which the universe collapses to a minimum of expansion before returning to expansion , have a long history @xcite . one of the interesting considerations for such a scenario is whether the matter content of the expanding phase is identical to that of the collapsing phase . in general , one mig... | in this paper we explore the idea that black holes can persist in a universe that collapses to a big crunch and then bounces into a new phase of expansion . we use a scalar field to model the matter content of such a universe near the time of the bounce , and look for solutions that represent a network of black holes w... | in this paper we explore the idea that black holes can persist in a universe that collapses to a big crunch and then bounces into a new phase of expansion . we use a scalar field to model the matter content of such a universe near the time of the bounce , and look for solutions that represent a network of black holes w... |
1303.7214 | i | thermalization of the quark - gluon plasma is one of the most challenging problems in current heavy ion physics . starting with two colliding nuclei in a form of color glass condensate with high gluon occupation @xmath0 below saturation scale @xmath1 @xcite and following the initial impact , a subsequent strong field e... | we derive the inelastic collision kernel under the collinear and small angle approximations . with both numerics and analytic analysis physics department and center for particle physics and field theory , fudan university , shanghai 200433 , china . 3 . 510a , brookhaven national laboratory , upton , ny 11973 , usa . | in this paper we investigate the role of inelastic collisions in the kinetic evolution of a highly overpopulated gluon system starting from glasma - type initial condition . using the gunion - bertsch formula we derive the inelastic collision kernel under the collinear and small angle approximations . with both numeric... |
1303.7214 | c | in summary , we have studied the kinetic evolution of a highly overpopulated system starting from glasma - type initial condition with the presence of both elastic and inelastic collisions . using the gunion - bertsch formula for the @xmath16 matrix element , we have derived the inelastic collision kernel under the col... | in this paper we investigate the role of inelastic collisions in the kinetic evolution of a highly overpopulated gluon system starting from glasma - type initial condition . using the gunion - bertsch formula , we show that the inelastic process has two effects : globally changing ( mostly reducing ) the total particle... | in this paper we investigate the role of inelastic collisions in the kinetic evolution of a highly overpopulated gluon system starting from glasma - type initial condition . using the gunion - bertsch formula we derive the inelastic collision kernel under the collinear and small angle approximations . with both numeric... |
1402.3694 | i | one of the classical problems in discrete geometry , raised by p. erds in 1946 @xcite , is the following : given @xmath2 points in the plane , how many unit distances they may determine ? the key definition related to the question of p. erds is that of a _ unit distance graph_. a graph @xmath1 is a _ unit distance grap... | in this paper we prove schur s conjecture in , which states that any diameter graph in on vertices may have at most cliques of size . we obtain an analogous statement for diameter graphs on a sphere of radius . * msc : * 52c10 . + 0.2 cm * keywords : * schur s conjecture , diameter graph , unit simplices in . | in this paper we prove schur s conjecture in , which states that any diameter graph in on vertices may have at most cliques of size . we obtain an analogous statement for diameter graphs on a sphere of radius . the proof rests on the following statement , conjectured by f. mori and j. pach : given two unit regular simp... |
0911.1267 | i | we now have compelling evidence that the rate of expansion of the universe is accelerating , requiring the universe to be dominated by an unknown form of matter , known as ` dark energy , ' characterized by the equation of state @xmath2 . this dark energy could be a cosmological constant unnaturally tuned at the level ... | we show that a chameleon model with only matter couplings will induce a coupling to photons . in doing so , we derive the first microphysical realization of a chameleonic dark energy model coupled to the electromagnetic field strength . we also study the effect of chameleon fields on higgs production , which is relevan... | in this paper we study various particle physics effects of a light , scalar dark energy field with chameleon - like couplings to matter . we show that a chameleon model with only matter couplings will induce a coupling to photons . in doing so , we derive the first microphysical realization of a chameleonic dark energy... |
hep-ph9407262 | i | searching for possible exotic states of nuclear matter is one of the currently most interesting and stimulating subjects in high energy nuclear physics ( see references [ 110 ] ) to create exotic matter such as the quark - gluon plasma ( qgp ) [ 14,5]strange matter @xcite,@xcite , multi@xmath11-matter , pion condensate... | numerical results for mean multiplicities of neutral strange particles , as well as their ratios to negatives hadrons( ) for p - p , nucleon - nucleon(n - n),p - s , p - ag , p - au(min . bias)collisions and p - au , s - s , s - ag , s - au ( central)collisions are compared to experimental data available from cern expe... | in this report we have made a systematic study of strangeness production in proton - proton(pp),proton - nucleus(pa ) and nucleus- nucleus(aa ) collisions at cern super proton synchroton energies , using + ( version ) . numerical results for mean multiplicities of neutral strange particles , as well as their ratios ... |
hep-ph9407262 | c | in this report , we give a systematic study of strange particle production in pp , pa and aa collisions mainly at sps cern - energies , using hijing monte carlo model developed for high energy collisions . we analyse data from cern experiments ( na35,na36 , + wa85 ) and we give a detailed comparison for mean multiplici... | in this report we have made a systematic study of strangeness production in proton - proton(pp),proton - nucleus(pa ) and nucleus- nucleus(aa ) collisions at cern super proton synchroton energies , using + ( version ) . the factor of two can not be explained by considering very central events ( ) and taking into acc... | in this report we have made a systematic study of strangeness production in proton - proton(pp),proton - nucleus(pa ) and nucleus- nucleus(aa ) collisions at cern super proton synchroton energies , using + ( version ) . numerical results for mean multiplicities of neutral strange particles , as well as their ratios ... |
1307.4044 | i | meson decays provide an important tool for exploring the structures of these simplest bound states in qcd , and for studies on non - perturbative behavior of strong interactions . these studies has become a hot topic in recent years . flavourless vector mesons play an important role in hadron physics due to their direc... | in this work we have employed bethe - salpeter equation ( bse ) under covariant instantaneous ansatz ( cia ) to study electromagnetic decays of ground state equal mass vector mesons : , , , and through the process . the electromagnetic decay constants for the above mesons are calculated using the leading order ( lo ) a... | in this work we have employed bethe - salpeter equation ( bse ) under covariant instantaneous ansatz ( cia ) to study electromagnetic decays of ground state equal mass vector mesons : , , , and through the process . we employ the generalized structure of hadron - quark vertex function which incorporates various dirac s... |
1505.03372 | i | approximate bayesian computation ( abc ) now plays an important role in performing ( approximate ) bayesian inference for the parameter of a proposed statistical model ( called the generative model here ) that has an intractable likelihood . despite the intense attention abc has recently received , the approach still s... | such an approach has been well explored in the classical literature but has received substantially less attention in the bayesian paradigm . the purpose of this paper is to compare and contrast a collection of what we call parametric bayesian indirect inference ( pbii ) methods . one class of pbii methods uses approxim... | indirect inference ( ii ) is a methodology for estimating the parameters of an intractable ( generative ) model on the basis of an alternative parametric ( auxiliary ) model that is both analytically and computationally easier to deal with . such an approach has been well explored in the classical literature but has re... |
1403.0012 | i | recently , the poisson point process ( ppp ) has been shown to be a tractable and realistic model of cellular networks @xcite . however , the baseline ppp model predicts the coverage probability of the typical user to be less than 60% if the signal - to - interference - plus - noise ratio ( sinr ) is set to 0 db even ... | modeling cellular base stations ( bss ) as a homogeneous poisson point process ( ppp ) , this paper provides explicit finite - integral expressions for the coverage probability with icic and icd , taking into account the temporal / spectral correlation of the signal and interference . in addition , we show that in the ... | inter - cell interference coordination ( icic ) and intra - cell diversity ( icd ) play important roles in improving cellular downlink coverage . modeling cellular base stations ( bss ) as a homogeneous poisson point process ( ppp ) , this paper provides explicit finite - integral expressions for the coverage probabili... |
1612.08401 | i | interfaces play an essential role in phonon - mediated heat conduction in solids.@xcite material discontinuities lead to thermal phonon reflections that are manifested on a macroscopic scale as a thermal boundary resistance ( tbr ) , also called kapitza resistance , @xmath0 , that relates the temperature drop at the in... | interfaces play an essential role in phonon - mediated heat conduction in solids , impacting applications ranging from thermoelectric waste heat recovery to heat dissipation in electronics . from the microscopic perspective , interfacial phonon transport is described by transmission coefficients that link vibrational m... | interfaces play an essential role in phonon - mediated heat conduction in solids , impacting applications ranging from thermoelectric waste heat recovery to heat dissipation in electronics . from the microscopic perspective , interfacial phonon transport is described by transmission coefficients that link vibrational m... |
1305.5884 | i | as hetnet provides flexible and efficient topology to boost spectral efficiency , it has recently aroused immense interest in both academia and industry . as illustrated in fig . [ fig : hetnet_2tiers ] , a hetnet consists of a diverse set of regular macro base stations ( bs ) overlaid with low power pico bss . since t... | interference is a major performance bottleneck in heterogeneous network ( hetnet ) due to its multi - tier topological structure . we propose almost blank resource block ( abrb ) for interference control in hetnet . dynamic abrb _ control . the long term controls , such as dynamic abrb , are adaptive to the large scale... | interference is a major performance bottleneck in heterogeneous network ( hetnet ) due to its multi - tier topological structure . we propose almost blank resource block ( abrb ) for interference control in hetnet . when an abrb is scheduled in a macro bs , a resource block ( rb ) with blank payload is transmitted and ... |
astro-ph9911292 | i | the dominant radio emitting structures at the galactic center ( gc ) are the supernova remnant ( snr)-like shell sagittarius ( sgr ) a east , a three - armed spiral of ionized gas dubbed sgr a west , and , embedded at the center of sgr a west , the galactic dynamical nucleus , sgr a * , thought to be a massive ( @xmath... | it has recently been demonstrated that the-ray emission spectrum of the egret - identified , central galactic source 2eg j1746 - 2852 can be well fitted by positing that these photons are generated by the decay of s produced in p - p scattering at or near an energizing shock . such scattering also produces charged pion... | it has recently been demonstrated that the-ray emission spectrum of the egret - identified , central galactic source 2eg j1746 - 2852 can be well fitted by positing that these photons are generated by the decay of s produced in p - p scattering at or near an energizing shock . such scattering also produces charged pion... |
cond-mat0207170 | r | our investigations were performed on two high - mobility soi structures which were prepared recently in finland . the soi hall bars have identical peak mobilities of @xmath4@xmath5/vs . they were fabricated on commercial unibond wafers produced by the smart - cut process @xcite . the thickness of the si - layer amounts... | it is shown that the electronic conduction in silicon - on - insulator ( soi ) layers exhibits a metallic regime which is very similar to that in high - mobility si - metal oxide semiconductor structures ( mos ) . the peak in the electron mobility versus density , the strong drop in resistivity and the critical concent... | it is shown that the electronic conduction in silicon - on - insulator ( soi ) layers exhibits a metallic regime which is very similar to that in high - mobility si - metal oxide semiconductor structures ( mos ) . the peak in the electron mobility versus density , the strong drop in resistivity and the critical concent... |
1606.09311 | i | electron - hole doping asymmetry in mott insulators has been one of the key questions related to the origin of superconductivity in the proximity of the insulating state @xcite . to investigate this , one should prepare an exactly half - filled ( zero - doped ) mott insulator and then inject or extract electrons , pref... | the doping effect , including the electron - hole doping asymmetry , may be more straightforward in doped organic mott insulators owing to their simple electronic structures . here we investigate the doping asymmetry of an organic mott insulator by carrying out electric - double - layer transistor measurements and usin... | it is widely recognised that the effect of doping into a mott insulator is complicated and unpredictable , as can be seen by examining the hall coefficient in high cuprates . the doping effect , including the electron - hole doping asymmetry , may be more straightforward in doped organic mott insulators owing to their ... |
0705.3783 | i | recent experimental studies @xcite of the dynamics of electrons and holes in graphene ( a single atomic layer of graphite @xcite ) have revealed unusual behaviour related to the dirac nature of its quasiparticles . two dimensional graphene has a honeycomb lattice structure with two atoms per unit cell . its band struct... | landau level quantization in graphene reflects the dirac nature of its quasiparticles and has been found to exhibit an unusual integer quantum hall effect . in particular the lowest landau level can be thought as shared equally by electrons and holes and this leads to characteristic behaviour of the magneto - optical c... | landau level quantization in graphene reflects the dirac nature of its quasiparticles and has been found to exhibit an unusual integer quantum hall effect . in particular the lowest landau level can be thought as shared equally by electrons and holes and this leads to characteristic behaviour of the magneto - optical c... |
1512.03383 | i | let @xmath0 be a finite extension of @xmath1 and let @xmath5 . in this article , we use the theory of @xmath2-modules in the lubin - tate setting to construct some classes in @xmath6 , for `` @xmath7-analytic '' representations @xmath3 of @xmath8 . if in addition @xmath3 is crystalline , we describe these classes expli... | let be a finite extension of . we use the theory of-modules in the lubin - tate setting to construct some corestriction - compatible families of classes in the cohomology of , for certain representations of . if in addition is crystalline , we describe these classes explicitly using bloch - kato s exponential maps . th... | let be a finite extension of . we use the theory of-modules in the lubin - tate setting to construct some corestriction - compatible families of classes in the cohomology of , for certain representations of . if in addition is crystalline , we describe these classes explicitly using bloch - kato s exponential maps . th... |
1312.0913 | i | let @xmath4 denote the orientable surface of genus @xmath1 with @xmath5 boundary components , and let @xmath6 denote the _ mapping class group _ of the closed surface @xmath7 , the group of all orientation preserving homeomorphisms of @xmath7 , modulo isotopy ( see farb - margalit @xcite for background ) . a pair of cu... | let denote the closed orientable surface of genus . we construct exponentially many mapping class group orbits of pairs of simple closed curves which fill and intersect minimally , by showing that such orbits are in correspondence with the solutions of a certain permutation equation in the symmetric group . we conclude... | let denote the closed orientable surface of genus . we construct exponentially many mapping class group orbits of pairs of simple closed curves which fill and intersect minimally , by showing that such orbits are in correspondence with the solutions of a certain permutation equation in the symmetric group . next , we d... |
1609.06971 | i | this paper investigates the behaviour of the liouville function which is connected to riemann s zeta function , @xmath3 , defined by@xmath8 where @xmath9 is a positive integer and @xmath2 is a complex variable , with the series being convergent for @xmath10 . this function has zeros ( referred to as the trivial zero... | liouville function , multiplicative function , factorization into primes , mobius function , riemann hypothesis this paper investigates the analytic properties of the liouville function s dirichlet series that obtains from the function , where is a complex variable and is the riemann zeta function . furthermore , by s... | liouville function , multiplicative function , factorization into primes , mobius function , riemann hypothesis this paper investigates the analytic properties of the liouville function s dirichlet series that obtains from the function , where is a complex variable and is the riemann zeta function . the paper employs ... |
astro-ph0209426 | i | disk accretion to a rotating magnetized star is important in a number of astrophysical objects , including t tauri stars ( edwards _ et al . _ 1994 ) , cataclysmic variables ( e.g. , warner 1995 ) , and x - ray pulsars ( e.g. , bildsten _ et al . _ 1997 ) . the accretion of matter to a rotating star with a dipole magne... | magnetohydrodynamic ( mhd ) simulations have been used to study disk accretion to a rotating magnetized star with an aligned dipole moment . dominated regime , more dramatic opening of the magnetic field was observed with the formation of magneto - centrifugally driven outflows . numerical applications of our simula... | magnetohydrodynamic ( mhd ) simulations have been used to study disk accretion to a rotating magnetized star with an aligned dipole moment . quiescent initial conditions were developed in order to avoid the fast initial evolution seen in earlier studies . a set of simulations was performed for different stellar magneti... |
1101.0959 | i | influenza a continues to evade eradication resulting in ongoing economic and human cost . yearly epidemics are responsible for 36,000 deaths on average in the united states . three times in the past century global pandemics , including the infamous spanish influenza of 1918 , resulted in catastrophic mortality rates [ ... | however , although the initial concession to stratify generally precludes the more sensible analysis using a single joint hierarchical model , we can circumvent this outcome and capitalize on the intermediate realizations by extending the dynamic iterative reweighting mcmc algorithm . in doing so , we reuse the availab... | massive datasets in the gigabyte and terabyte range combined with the availability of increasingly sophisticated statistical tools yield analyses at the boundary of what is computationally feasible . compromising in the face of this computational burden by partitioning the dataset into more tractable sizes results in s... |
1507.02291 | i | massive galaxies at high redshift have been observed to have properties which can be quite different from their counterparts at similar mass in the local universe . one of the most striking differences is the much smaller sizes observed for high - redshift galaxies . for example , a quiescent galaxy with a stellar mass... | massive quiescent galaxies have much smaller physical sizes at high redshift than today . herein , we select a sample of 35 massive , compact galaxies ( m , m/kpc ) at in the cosmological hydrodynamical simulation illustris and trace them forward to to uncover their evolution and identify their descendants . [ firstpag... | massive quiescent galaxies have much smaller physical sizes at high redshift than today . the strong evolution of galaxy size may be caused by progenitor bias , major and minor mergers , adiabatic expansion , and/or renewed star formation , but it is difficult to test these theories observationally . herein , we select... |
1507.02291 | c | given that about half of the compact galaxies from @xmath4 exist at @xmath5 as the cores of very massive galaxies , one can ask the reverse question : how many massive galaxies have cores which were once compact galaxies ? we address this question by tracing all the @xmath5 massive galaxies through the merger tree and ... | the galaxies grow in size as well as mass , and only% remain compact by . the majority of the size growth is driven by the acquisition of ex - situ mass . the compact galaxies merger rates are influenced by their environments , so that isolated or satellite compact galaxies ( which are protected from mergers ) are the ... | massive quiescent galaxies have much smaller physical sizes at high redshift than today . the strong evolution of galaxy size may be caused by progenitor bias , major and minor mergers , adiabatic expansion , and/or renewed star formation , but it is difficult to test these theories observationally . herein , we select... |
1507.02291 | i | herein , we have identified a population of 35 massive ( @xmath11 m@xmath1 ) galaxies at @xmath4 in the cosmological hydrodynamical simulation illustris which satisfy the compactness criterion @xmath71 . we have traced these massive , compact galaxies forward in time through the simulation to their @xmath5 descendants ... | the strong evolution of galaxy size may be caused by progenitor bias , major and minor mergers , adiabatic expansion , and/or renewed star formation , but it is difficult to test these theories observationally . by , the original factor of 3 difference in stellar mass spreads to a factor of 20 . the dark matter halo ma... | massive quiescent galaxies have much smaller physical sizes at high redshift than today . the strong evolution of galaxy size may be caused by progenitor bias , major and minor mergers , adiabatic expansion , and/or renewed star formation , but it is difficult to test these theories observationally . herein , we select... |
astro-ph0508103 | i | understanding the formation and pre - main - sequence evolution of massive stars ( @xmath2 m@xmath3 ) is an important goal in modern astrophysics . currently , the formation of low - mass stars via gravitational collapse of a molecular cloud and subsequent disk accretion is , at least conceptually , well understood bu... | massive young stellar objects ( ysos ) are powerful infrared h i line emitters . it has been suggested that these lines form in a outflow from a disk surrounding the yso . here , new two - dimensional monte carlo radiative transfer calculations infrared spectra are synthesised for a yso disk wind model based on earlie... | massive young stellar objects ( ysos ) are powerful infrared h i line emitters . it has been suggested that these lines form in a outflow from a disk surrounding the yso . here , new two - dimensional monte carlo radiative transfer calculations are described which test this hypothesis . infrared spectra are synthesise... |
1605.04086 | i | maxwell s equations on the whole three - dimensional space are considered with initial conditions and inhomogeneity having support in a bounded domain that is not required to be convex ( or in a finite collection of such domains ) . the study of such problems leads to transparent boundary conditions , which yield the r... | maxwell s equations are considered with transparent boundary conditions , for initial conditions and inhomogeneity having support in a bounded , not necessarily convex three - dimensional domain or in a collection of such domains . the numerical method only involves the interior domain and its boundary . the transparen... | maxwell s equations are considered with transparent boundary conditions , for initial conditions and inhomogeneity having support in a bounded , not necessarily convex three - dimensional domain or in a collection of such domains . the numerical method only involves the interior domain and its boundary . the transparen... |
1310.3566 | i | the agt correspondence @xcite implies a relation between the canonical partition function of a and the grand canonical partition function of a generalized matrix model . the former represents a correlator of liouville theory , according to the proposal of dijkgraaf and vafa @xcite , further investigated in @xcite . th... | it has recently been applied to the nekrasov instanton partition function of 4d gauge theories . the associated canonical model involves coupled integrations that take the form of a generalized matrix model . it can be studied with the standard techniques of matrix models , in particular collective field theory and loo... | mayer cluster expansion is an important tool in statistical physics to evaluate grand canonical partition functions . it has recently been applied to the nekrasov instanton partition function of 4d gauge theories . the associated canonical model involves coupled integrations that take the form of a generalized matrix m... |
1310.3566 | c | in these notes we compared the cluster expansion of a grand canonical model with the standard matrix model treatment of its canonical partition function . at tree level , the grand canonical free energy is given by the minimum of an effective action which is identical to the one provided by the collective field theory ... | we explain how the results of collective field theory can be derived from the cluster expansion . the equalities between free energies at first orders is explained by the discrete laplace transform relating canonical and grand canonical models . in a second part , we study the canonical loop equations and associate the... | mayer cluster expansion is an important tool in statistical physics to evaluate grand canonical partition functions . it has recently been applied to the nekrasov instanton partition function of 4d gauge theories . the associated canonical model involves coupled integrations that take the form of a generalized matrix m... |
1607.07302 | i | the gauge / gravity correspondence is a fascinating topic in the study of string theory . a certain class of it preserving a conformal symmetry , in which a string theory is defined on an anti - de sitter ( ads ) space and its dual is a conformal field theory ( cft ) , is called the ads / cft correspondence @xcite . a ... | it is a powerful technique , though its applicability is somewhat limited . in this paper , we present a solution of type iib supergravity to which melnikov s method is applicable . , we study two types of coupled pendulum - oscillator systems . then the melnikov function is computed for each of the systems by followin... | melnikov s method is an analytical way to show the existence of classical chaos generated by a smale horseshoe . it is a powerful technique , though its applicability is somewhat limited . in this paper , we present a solution of type iib supergravity to which melnikov s method is applicable . this is a brane - wave ty... |
1607.07302 | c | in this paper , we have considered an application of melnikov s method in the context of the gauge / gravity correspondence . in particular , we have presented a string background to which melnikov s method is applicable . this is a brane - wave type deformation of the ads@xmath0s@xmath1 background . by employing two r... | melnikov s method is an analytical way to show the existence of classical chaos generated by a smale horseshoe . this is a brane - wave type deformation of the adss background . by employing two reduction anstze +_department of physics , kyoto university , + kitashirakawa oiwake - cho , kyoto 606 - 8502 , japan _ | melnikov s method is an analytical way to show the existence of classical chaos generated by a smale horseshoe . it is a powerful technique , though its applicability is somewhat limited . in this paper , we present a solution of type iib supergravity to which melnikov s method is applicable . this is a brane - wave ty... |
1605.01485 | i | data with a matrix - valued response for each experimental unit are commonly encountered in contemporary statistical applications . for example , a longitudinal multivariate response can be treated integrally as a matrix - valued variable by designating rows and columns to be time and variates . temporal and spatial da... | modern technology often generates data with complex data structures in which both response and explanatory variables are matrix - valued . existing methods in the literature are able to tackle matrix - valued predictors but are rather limited for matrix - valued responses . in this article , we study matrix - variate r... | modern technology often generates data with complex data structures in which both response and explanatory variables are matrix - valued . existing methods in the literature are able to tackle matrix - valued predictors but are rather limited for matrix - valued responses . in this article , we study matrix - variate r... |
1611.03322 | i | a robotic system s decision making is well known to be in need of some hard decision making at times . a most popular example is asimov s laws @xcite , which demonstrate the difficulties to apply logic by robots in practice . a shortened version of these laws is `` 1 . a robot may not allow a human being to come to har... | this paper investigates how a robotic agent can use model checking to examine the consistency of its rules , beliefs and actions . a rule set is modelled by a boolean evolution system with synchronous semantics , which can be translated into a labelled transition system ( lts ) . their implementation provides us a comp... | most autonomous robotic agents use logic inference to keep themselves to safe and permitted behaviour . given a set of rules , it is important that the robot is able to establish the consistency between its rules , its perception - based beliefs , its planned actions and their consequences . this paper investigates how... |
1502.03959 | i | the discovery of the higgs boson at atlas and cms experiments @xcite made a revolutionary impact on the field of particle physics . it not only confirmed the so - called higgs mechanism for the electroweak symmetry breaking , but also opened a new possibility to perform a precise test of the standard model ( sm ) by st... | these constraints exclude large fraction of the parameter region where the higgs widths show significant deviation from the standard model predictions . nevertheless , even if superparticles and the heavy higgses are out of the reach of lhc , the deviation may be large enough to be observed at future collider experimen... | motivated by future collider proposals that aim to measure the higgs properties precisely , we study the partial decay widths of the lightest higgs boson in the minimal supersymmetric standard model with an emphasis on the parameter region where all superparticles and heavy higgs bosons are not accessible at the lhc . ... |
1502.03959 | c | in this paper , we have studied the partial decay widths of the lightest higgs boson in the mssm . taking account of relevant phenomenological constraints , i.e. , higgs mass , flavor constraints , vacuum stability , and the perturbativity of coupling constants up to the gut scale , we have calculated the expected devi... | motivated by future collider proposals that aim to measure the higgs properties precisely , we study the partial decay widths of the lightest higgs boson in the minimal supersymmetric standard model with an emphasis on the parameter region where all superparticles and heavy higgs bosons are not accessible at the lhc . ... | motivated by future collider proposals that aim to measure the higgs properties precisely , we study the partial decay widths of the lightest higgs boson in the minimal supersymmetric standard model with an emphasis on the parameter region where all superparticles and heavy higgs bosons are not accessible at the lhc . ... |
0807.0619 | i | the main result of this paper ( theorem [ main ] ) says that the special fiber of a galois branched cover of the open @xmath0-adic disc is determined by characteristic zero fibers . the motivation for such a theorem comes from the _ global lifting problem for galois covers of curves _ : if @xmath1 is a finite group , @... | motivated by the local lifting problem for galois covers of curves , this paper investigates galois branched covers of the open-adic disc . using the field of norms functor of fontaine and wintenberger , we show that the special fiber of a galois cover is determined by arithmetic and geometric properties of the generic... | motivated by the local lifting problem for galois covers of curves , this paper investigates galois branched covers of the open-adic disc . using the field of norms functor of fontaine and wintenberger , we show that the special fiber of a galois cover is determined by arithmetic and geometric properties of the generic... |
1111.1668 | i | electron - positron pair production by rotation - powered pulsars is believed to be essential to the generation of charged particles in their magnetospheres and winds , as well as to the generation of their coherent pulsed radio emission . pairs can be produced through electromagnetic cascades initiated by accelerated ... | neutron star magnetic fields may have polar caps ( pc ) that are offset from the dipole axis , through field - line sweepback near the light cylinder or non - symmetric currents within the star . we find that even modest offsets can produce significant increases in pair multiplicity , especially for pulsars that are ne... | neutron star magnetic fields may have polar caps ( pc ) that are offset from the dipole axis , through field - line sweepback near the light cylinder or non - symmetric currents within the star . the effects of such offsets on electron - positron pair cascades are investigated , using simple models of dipole magnetic f... |
1111.1668 | r | for a given set of input parameters that include pulsar period @xmath130 , surface magnetic field @xmath20 , inclination angle @xmath117 , and offset degree @xmath16 , direction @xmath23 and symmetry ( case a or b ) , the cascade calculation produces the pair spectrum per primary electron as a function of @xmath82 and ... | pair spectra cover several decades in energy , with the spectral range of millisecond pulsars ( msps ) two orders of magnitude higher than for normal pulsars , and pc offsets allow significant extension of all spectra to lower pair energies . we find that the total pc pair luminosity is proportional to , with for norma... | neutron star magnetic fields may have polar caps ( pc ) that are offset from the dipole axis , through field - line sweepback near the light cylinder or non - symmetric currents within the star . the effects of such offsets on electron - positron pair cascades are investigated , using simple models of dipole magnetic f... |
1111.1668 | c | we have investigated the effects of offset polar caps on electron acceleration and pair cascades near the neutron star surface , including the cases where the pcs of the two hemispheres are offset symmetrically by the same amount or asymmetrically . the asymmetric offset case would apply to the pcs shifted by retardati... | the effects of such offsets on electron - positron pair cascades are investigated , using simple models of dipole magnetic fields with small distortions that shift the pcs by different amounts or directions . using a monte carlo pair cascade simulation , we explore the changes in the pair spectrum , multiplicity and en... | neutron star magnetic fields may have polar caps ( pc ) that are offset from the dipole axis , through field - line sweepback near the light cylinder or non - symmetric currents within the star . the effects of such offsets on electron - positron pair cascades are investigated , using simple models of dipole magnetic f... |
gr-qc0402015 | i | there is now an extended body of evidence in support of superfluidity in dense , nucleonic matter , such as that which is believed to exist in neutron stars . using conservative estimates one can argue for a fermi temperature on the order of @xmath2 for neutrons in media with supranuclear densities , and that the trans... | neutron stars that are cold enough should have two or more superfluids / supercondutors in their inner crusts and cores . an important consequence of the quasiparticle nature of each condensate is the so - called entrainment effect , i.e. the momentum of a condensate is a linear combination of its own current and tho... | neutron stars that are cold enough should have two or more superfluids / supercondutors in their inner crusts and cores . the implication of superfluidity / superconductivity for equilibrium and dynamical neutron star states is that each individual particle species that forms a condensate must have its own , independe... |
hep-lat0412040 | i | two - dimensional ( @xmath7 ) lattice spin models , besides being interesting on their own right as models of ferromagnets can be viewed as mathematically well defined scheme of the nonperturbative regularization of quantum continuum field theories like @xmath0 principal chiral model or @xmath8 nonlinear sigma model . ... | non - abelian lattice spin models with symmetry group or can be formulated in terms of link variables which are subject to the bianchi constraints . using this representation we derive exact and local dual formulation for the partition function of such models on a cubic lattice in arbitrary dimension . locality means t... | non - abelian lattice spin models with symmetry group or can be formulated in terms of link variables which are subject to the bianchi constraints . using this representation we derive exact and local dual formulation for the partition function of such models on a cubic lattice in arbitrary dimension . locality means t... |
0806.2739 | i | if the dimensions of a device become smaller than the phase coherence length @xmath0 of charge carriers , classical transport theories are not valid any more . instead , carrier dynamics is now governed by quantum mechanics , and the wave - like nature of particles becomes important . in general , the conductance / res... | numerical quantum transport calculations are commonly based on a tight - binding formulation . a wide class of quantum transport algorithms requires the tight - binding hamiltonian to be in the form of a block - tridiagonal matrix . here , we develop a matrix reordering algorithm based on graph partitioning techniques ... | numerical quantum transport calculations are commonly based on a tight - binding formulation . a wide class of quantum transport algorithms requires the tight - binding hamiltonian to be in the form of a block - tridiagonal matrix . here , we develop a matrix reordering algorithm based on graph partitioning techniques ... |
1005.3281 | i | we have used _ chandra_/letgs observations to study the coronae of the @xmath0 boo binary , and we have compared our results with a previous study of five other moderately active gk dwarfs : @xmath3 eri , 70 oph ab , and 36 oph ab . our findings are summarized as follows : 1 . the two stellar components of @xm... | boo a and b to the system s total x - ray emission now observationally established ( 88.5% and 11.5% , respectively ) , consideration of mass loss measurements for gk dwarfs of various activity levels ( including one for boo ) leads to the surprising conclusion that boo b may dominate the wind from the binary , wit... | on 2008 may 2 , _ chandra _ observed the x - ray spectrum of boo ( g8 v+k4 v ) , resolving the binary for the first time in x - rays and allowing the coronae of the two stars to be studied separately . with the contributions of boo a and b to the system s total x - ray emission now observationally established ( 88... |
0705.1132 | m | once constraints on the principal components of the reionization history have been obtained from cmb polarization data , there are several ways to use those constraints to place limits on observables such as @xmath2 or to test theories of reionization @xcite . we describe some possible applications in this section , an... | interpretation of the polarization spectrum usually requires the assumption of a fixed functional form for the evolution , e.g. instantaneous reionization . we develop a model - independent method where a small set of principal components completely encapsulate the effects of reionization on the large - angle-mode pol... | on large angular scales , the polarization of the cmb contains information about the evolution of the average ionization during the epoch of reionization . interpretation of the polarization spectrum usually requires the assumption of a fixed functional form for the evolution , e.g. instantaneous reionization . we dev... |
0705.1132 | c | observations of the large - scale @xmath0-mode polarization of the cmb in the near future are expected to yield new information about the spatially - averaged reionization history of the universe . the principal components of the reionization history are a promising tool for extracting as much of that information as po... | on large angular scales , the polarization of the cmb contains information about the evolution of the average ionization during the epoch of reionization . wmap _ data also place a 95% cl upper limit of 0.08 on the contribution to the optical depth from redshifts . with improvements in polarization sensitivity and for... | on large angular scales , the polarization of the cmb contains information about the evolution of the average ionization during the epoch of reionization . interpretation of the polarization spectrum usually requires the assumption of a fixed functional form for the evolution , e.g. instantaneous reionization . we dev... |
math0311384 | i | during the last 20 years the theory of frames has been growing rapidly , since several new applications have been developed . for example , besides traditional applications as signal processing , image processing , data compression , and sampling theory , frames are now used to mitigate the effect of losses in packet -... | one approach to ease the construction of frames is to first construct local components and then build a global frame from these . in this paper we will show that the study of the relation between a frame and its local components leads to the definition of a frame of subspaces . we introduce this new notion and prove th... | one approach to ease the construction of frames is to first construct local components and then build a global frame from these . in this paper we will show that the study of the relation between a frame and its local components leads to the definition of a frame of subspaces . we introduce this new notion and prove th... |
1612.03618 | i | to answer users changing requirements , software systems must continuously evolve @xcite . having developers to understand a program s source code which may include thousands of lines of code , and focus on those parts on which they want to perform their maintenance activities , is the main reason of 60% to 90% of the... | however , generating code summaries can be a challenging task . to mitigate this problem , in this article , we introduce _ crowdsummarizer _ , a code summarization platform that benefits from the concepts of crowdsourcing , gamification , and natural language processing to automatically generate a high level summary f... | one of the first steps to perform most of the software maintenance activities , such as updating features or fixing bugs , is to have a relatively good understanding of the program s source code which is often written by other developers . a code summary is a description about a program s entities ( e.g. , its methods ... |
1612.03618 | c | this article introduced crowdsummarizer , a novel approach for automated generation of natural language summaries for java programs and their methods . to this end , crowdsummarizer employs the concepts of crowdsourcing , gamification , and natural language processing . furthermore , it applies the lda technique to ide... | we have implemented crowdsummarizer as an eclipse plugin together with a web - based code summarization game that can be played by the crowd . the results of two empirical studies that evaluate the applicability of the approach and the quality of generated summaries indicate that crowdsummarizer is effective in generat... | one of the first steps to perform most of the software maintenance activities , such as updating features or fixing bugs , is to have a relatively good understanding of the program s source code which is often written by other developers . a code summary is a description about a program s entities ( e.g. , its methods ... |
1403.4290 | i | an important and challenging task in computational modeling is the solution of inverse problems , which convert noisy and indirect observational data into useful characterizations of the unknown parameters of a numerical model . in this process , statistical methods bayesian methods in particular play a fundamental r... | one of the major challenges in the bayesian solution of inverse problems governed by partial differential equations ( pdes ) is the computational cost of repeatedly evaluating numerical pde models , as required by markov chain monte carlo ( mcmc ) methods for posterior sampling . the proposed technique has two distinct... | one of the major challenges in the bayesian solution of inverse problems governed by partial differential equations ( pdes ) is the computational cost of repeatedly evaluating numerical pde models , as required by markov chain monte carlo ( mcmc ) methods for posterior sampling . this paper proposes a data - driven pro... |
1403.4290 | c | we have introduced a new data - driven model reduction approach for solving statistical inverse problems . our approach constructs the reduced - order model using adaptively - selected posterior samples to compute the snapshots . the reduced - order model construction process is integrated into the posterior sampling ,... | this paper proposes a data - driven projection - based model reduction technique to reduce this computational cost . posterior exploration and model reduction are thus pursued simultaneously . the data - driven reduced - order model achieves better accuracy than a reduced - order model constructed using the classical a... | one of the major challenges in the bayesian solution of inverse problems governed by partial differential equations ( pdes ) is the computational cost of repeatedly evaluating numerical pde models , as required by markov chain monte carlo ( mcmc ) methods for posterior sampling . this paper proposes a data - driven pro... |
astro-ph0702100 | i | the fluctuations in the cosmic microwave background ( cmb ) radiation are theoretically very well understood , allowing precise and unambiguous predictions for a given cosmological model ( bond 1996 , hu and dodelson 2002 ) . the measurement of cmb anisotropy with the ongoing wilkinson microwave anisotropy probe ( wmap... | the analysis techniques must not only be computationally fast to contend with the huge size of the data , but , the higher sensitivity also limits the simplifying assumptions which can then be invoked to achieve the desired speed without compromising the final precision goals . while maximum likelihood is desirable , t... | over the last decade , measurements of the cmb anisotropy has spearheaded the remarkable transition of cosmology into a precision science . however , addressing the systematic effects in the increasingly sensitive , high resolution , ` full ' sky measurements from different cmb experiments pose a stiff challenge . the ... |
0909.1717 | i | an analysis using three - particle correlations that are directly sensitive to the -violation effects in heavy - ion collisions has been presented for au+au and cu+cu collisions at @xmath0=200 and 62 gev . the results are reported for different particle charge combinations as a function of collision centrality , parti... | we report measurements of this observable using the star detector in au+au and cu+cu collisions at=200 and 62 gev . the results are presented as a function of collision centrality , particle separation in rapidity , and particle transverse momentum . a signal consistent with several of the theoretical expectations | parity - odd domains , corresponding to non - trivial topological solutions of the qcd vacuum , might be created during relativistic heavy - ion collisions . these domains are predicted to lead to charge separation of quarks along the orbital momentum of the system created in non - central collisions . to study this ef... |
1402.4886 | i | the well known @xmath2-queens problem asks for the number of ways to place @xmath2 nonattacking queens on an @xmath1[d : n ] chessboard . a more general question separates the number of pieces from the size of the board ; that is the @xmath0-queens problem , which asks for the number of ways to place @xmath0[d : q ] no... | parts i and ii showed that the number of ways to place nonattacking queens or similar chess pieces on an square chessboard is a quasipolynomial function of in which the coefficients are essentially polynomials in . we explore this function for partial queens , which are pieces like the rook and bishop whose moves are ... | parts i and ii showed that the number of ways to place nonattacking queens or similar chess pieces on an square chessboard is a quasipolynomial function of in which the coefficients are essentially polynomials in . we explore this function for partial queens , which are pieces like the rook and bishop whose moves are ... |
0710.5598 | r | for the oxygen atoms of ppo and @xmath23 . the temperatures are , from left to right , @xmath24 , @xmath25 , @xmath26 , @xmath27 , @xmath28 , @xmath29 , @xmath30 , and @xmath31 . the dashed lines are von schweidler fits , see eq . ( [ eq_von ] ) . the inset shows the time temperature superposition of the same data . th... | the temperature dependence of these relaxation processes deviates from an arrhenius law for both polymers . we demonstrate that mode - coupling theory captures some aspects of the glassy slowdown , but it does not enable a complete explanation of the dynamical behavior . moreover , the transitions between the conformat... | performing molecular dynamics simulations for all - atom models , we characterize the conformational and structural relaxations of poly(ethylene oxide ) and poly(propylene oxide ) melts . the temperature dependence of these relaxation processes deviates from an arrhenius law for both polymers . we demonstrate that mode... |
hep-ex9801024 | i | this paper describes a search for photonic events with large missing energy in @xmath11 collisions at centre - of - mass energies of 130 , 136 , 161 and 172 gev . two different search topologies are used . cross - section measurements and search results from single - photon and acoplanar - photons topologies at @xmath5... | photonic events with large missing energy have been observed in collisions at centre - of - mass energies of 130 , 136 , 161 and 172 gev using the opal detector at lep . results are presented based on search topologies designed to select events with a single photon and missing transverse energy or events with a pair of... | photonic events with large missing energy have been observed in collisions at centre - of - mass energies of 130 , 136 , 161 and 172 gev using the opal detector at lep . results are presented based on search topologies designed to select events with a single photon and missing transverse energy or events with a pair of... |
hep-ex9801024 | c | we have searched for photonic events with large missing energy in two different and complementary topologies in data taken with the opal detector at lep , at centre - of - mass energies in the region of 130 - 172 gev . in the single - photon selection which requires at least one photon with @xmath121 in the region @... | upper limits on and + are derived for the case of stable and invisible . these limits apply to single and pair production of excited neutrinos ( ) , to neutralino production ( ) , and to supersymmetric models in which and is a light gravitino . for the latter scenario , the results of the acoplanar - photons search are... | photonic events with large missing energy have been observed in collisions at centre - of - mass energies of 130 , 136 , 161 and 172 gev using the opal detector at lep . results are presented based on search topologies designed to select events with a single photon and missing transverse energy or events with a pair of... |
1601.03906 | i | bivariate extreme value copulas are characterized by the pickands dependence functions , these are functions @xmath3 \to{\mathbb{r}}$ ] which satisfy the conditions : 1 . _ boundary conditions _ : @xmath4 , @xmath5 $ ] . convexity condition _ : @xmath6 is convex . in the presence of the _ convexity condition _ ... | pickands dependence functions characterize bivariate extreme value copulas . in this paper , we study the class of polynomial pickands functions . we provide a solution for the characterization of such polynomials of degree at most , , and show that these can be parameterized by a vector in belonging to the intersectio... | pickands dependence functions characterize bivariate extreme value copulas . in this paper , we study the class of polynomial pickands functions . we provide a solution for the characterization of such polynomials of degree at most , , and show that these can be parameterized by a vector in belonging to the intersectio... |
1505.00047 | m | our key idea is to adapt the pce to the dynamics of the system . consider for concreteness the following sde : @xmath43,\end{aligned}\ ] ] where @xmath44 is a general function of @xmath20 ( and possibly other deterministic or stochastic parameters ) , @xmath29 is a brownian motion , @xmath45 is a constant , and @xmath4... | their main challenge is that the computational cost becomes prohibitive when the dimension of the parameters modeling the stochasticity is even moderately large . we present a restart procedure that precisely allows pce to depend only on that information . we present theoretical results of convergence for our dynamical... | polynomial chaos expansions ( pce ) allow us to propagate uncertainties in the coefficients of differential equations to the statistics of their solutions . their main advantage is that they replace stochastic equations by systems of deterministic equations . their main challenge is that the computational cost becomes ... |
1505.00047 | c | polynomial chaos expansions ( pce ) applied to the simulation of evolution equations suffer from two drawbacks : in the presence of stochastic forcing , the dimension of randomness is too large , and the long - time solution may not be sparsely represented in a fixed pce basis @xcite . in the setting of markovian rando... | polynomial chaos expansions ( pce ) allow us to propagate uncertainties in the coefficients of differential equations to the statistics of their solutions . we propose a generalization of the pce framework that allows us to keep this dimension as small as possible in favorable situations . for instance , in the setting... | polynomial chaos expansions ( pce ) allow us to propagate uncertainties in the coefficients of differential equations to the statistics of their solutions . their main advantage is that they replace stochastic equations by systems of deterministic equations . their main challenge is that the computational cost becomes ... |
0910.2612 | c | for a large class of supersymmetric extensions of the standard model gluinos will be sufficiently stable to form color - neutral non - relativistic boundstates . the nnlo potential between color - octet constituents forming color singlets has been derived . just as in leading and next - to - leading order the coulombic... | predictions for energy levels , production and decay rate of gluinonia , non - relativistic boundstates of gluinos , are presented . the potential between color - octet constituents is derived in next - to - next - to leading order and one - loop qcd corrections are derived for the production cross section and the deca... | predictions for energy levels , production and decay rate of gluinonia , non - relativistic boundstates of gluinos , are presented . the potential between color - octet constituents is derived in next - to - next - to leading order and one - loop qcd corrections are derived for the production cross section and the deca... |
1509.01921 | i | multicomponent fractional quantum hall ( fqh ) systems feature rich physics of strongly interacting electrons . in contrast to strong electronic correlations in various ( material dependent ) crystal settings , in fqh systems the kinetic energy is effectively removed from the problem due to the landau quantization in s... | an exact diagonalization study in the torus geometry pointed out the existence of state(s ) with pseudospin spiraling order . here we reconcile these two descriptions of the intermediate state by considering the underlying bosonic representation of the composite fermion paired state in the long distance limit , and by ... | quantum hall bilayer phase diagram with respect to interlayer distance bears a remarkable similarity with phase diagrams of strongly correlated systems as a function of doping , with magnetic ordering on the one end and fermi - liquid - like behavior on the other . moreover , it has been suggested that a bcs correlate... |
1103.3323 | i | quantum phases of matter with exotic types of order have continued to emerge over the past decades . examples include fractional quantum hall states@xcite , 1d haldane phase@xcite , chiral spin liquids,@xcite @xmath0 spin liquids,@xcite non - abelian fractional quantum hall states,@xcite quantum orders characterized by... | quantum phases with different orders exist with or without breaking the symmetry of the system . recently , a classification of gapped quantum phases which do not break time reversal , parity or on - site unitary symmetry has been given for 1d spin systems in [ x. chen , z .- c . gu , and x .- wen , phys . rev . b * 83... | quantum phases with different orders exist with or without breaking the symmetry of the system . recently , a classification of gapped quantum phases which do not break time reversal , parity or on - site unitary symmetry has been given for 1d spin systems in [ x. chen , z .- c . gu , and x .- g . wen , phys . rev . b ... |
cond-mat0702495 | c | the bipolaronic extension @xcite of the bcs theory towards the strong interaction between electrons and ion vibrations proved that the cooper pairing in momentum space @xcite and the ogg - schafroth real - space pairing @xcite are two extreme limits of the same problem . for a very strong electron - phonon coupling , p... | recent angle - resolved photoemission spectroscopy ( arpes ) has identified that a finite - range frhlich electron - phonon interaction ( epi ) with c - axis polarized optical phonons is important in cuprate superconductors , in agreement with an earlier proposal by alexandrov and kornilovitch . the estimated unscreene... | recent angle - resolved photoemission spectroscopy ( arpes ) has identified that a finite - range frhlich electron - phonon interaction ( epi ) with c - axis polarized optical phonons is important in cuprate superconductors , in agreement with an earlier proposal by alexandrov and kornilovitch . the estimated unscreene... |
0909.2644 | i | motivated by the recent discovery of massive planets on wide orbits , we explore the requirements for making gas giants at large separations from their host star via gravitational instability , hereafter , gi . in particular , we consider the formation mechanism for the system hr 8799 which contains three @xmath0@xmath... | recent direct imaging discoveries suggest a new class of massive , distant planets around a stars . these widely separated giants have been interpreted as signs of planet formation driven by gravitational instability , but the viability of this mechanism is not clear cut . in this paper , we first discuss the local req... | recent direct imaging discoveries suggest a new class of massive , distant planets around a stars . these widely separated giants have been interpreted as signs of planet formation driven by gravitational instability , but the viability of this mechanism is not clear cut . in this paper , we first discuss the local req... |
1111.7219 | i | the remarkable speed and multiplexing capability of optics makes it very attractive for information processing . these features have enabled the telecommunications revolution of the past decades . however , so far they have not been exploited insomuch as computation is concerned . the reason is that optical nonlinearit... | reservoir computing is a recently introduced , highly efficient bio - inspired approach for processing time dependent data . we report an opto - electronic implementation of reservoir computing based on a recently proposed architecture consisting of a single non linear node and a delay line . we illustrate its performa... | reservoir computing is a recently introduced , highly efficient bio - inspired approach for processing time dependent data . the basic scheme of reservoir computing consists of a non linear recurrent dynamical system coupled to a single input layer and a single output layer . within these constraints many implementatio... |
1506.07040 | i | evolution equations often contain some structural information reflecting inherent physical properties such as positivity of solutions , conservation laws , and entropy dissipation . numerical schemes should be designed in such a way that these structural features are preserved on the discrete level in order to obtain a... | semi - discrete runge - kutta schemes for nonlinear diffusion equations of parabolic type are analyzed . conditions are determined under which the schemes dissipate the discrete entropy locally . the dissipation property is a consequence of the concavity of the difference of the entropies at two consecutive time steps ... | semi - discrete runge - kutta schemes for nonlinear diffusion equations of parabolic type are analyzed . conditions are determined under which the schemes dissipate the discrete entropy locally . the dissipation property is a consequence of the concavity of the difference of the entropies at two consecutive time steps ... |
1604.06697 | i | sorting a sequence of elements of some totally ordered universe remains one of the most fascinating and well - studied topics in computer science . moreover , it is an essential part of many practical applications . thus , efficient sorting algorithms directly transfer to a performance gain for many applications . one ... | since the work of kaligosi and sanders ( 2006 ) , it is well - known that quicksort which is commonly considered as one of the fastest in - place sorting algorithms suffers in an essential way from branch mispredictions . , we avoid conditional branches based on outcomes of comparisons at all ( except for the final... | since the work of kaligosi and sanders ( 2006 ) , it is well - known that quicksort which is commonly considered as one of the fastest in - place sorting algorithms suffers in an essential way from branch mispredictions . we present a novel approach to address this problem by partially decoupling control from data ... |
1604.06697 | r | we ran thorough experiments with implementations in c++ on different machines with different types of data and different kinds of input sequences . if not specified explicitly , the experiments are run on an intel core i5 - 2500k cpu ( 3.30ghz , 4 cores , 32 kb l1 instruction and data cache , 256 kb l2 cache per core a... | our experimental results are promising : when sorting random integer data , we achieve an increase in speed ( number of elements sorted per second ) of more than 80% over the gcc implementation of c++ ` std:\!:sort ` . also for many other types of data and non - random inputs moreover , even on random input permutation... | since the work of kaligosi and sanders ( 2006 ) , it is well - known that quicksort which is commonly considered as one of the fastest in - place sorting algorithms suffers in an essential way from branch mispredictions . we present a novel approach to address this problem by partially decoupling control from data ... |
1412.2433 | i | the ability to learn the social path lengthto other social network users can often help individuals make informed trust and access control decisions . for instance , if attendees at a large convention could easily find other attendees with whom they share social links ( e.g. , a linkedin connection ) , this could help ... | this paper presents social pal , a system supporting the privacy - preserving discovery of arbitrary - length social paths between any two social network users . e.g. , discovering 70% of all paths with only 40% of the users . we implement social palusing a scalable server - side architecture and a modular android c... | social relationships are a natural basis on which humans make trust decisions . online social networks ( osns ) are increasingly often used to let users base trust decisions on the existence and the strength of social relationships . while most osns allow users to discover the length of the social path to other users ,... |
1412.2433 | c | this paper presented social pal a system geared to privately estimate the social path length between two social network users . we demonstrated its effectiveness both analytically and empirically , showing that , for any two osn users , social paldiscovers all social paths of length two and a significant portion of... | social relationships are a natural basis on which humans make trust decisions . we overcome the bootstrapping problem encountered in all related prior work , demonstrating that social palallows its users to find all paths of length two and to discover a significant fraction of longer paths , even when only a small fra... | social relationships are a natural basis on which humans make trust decisions . online social networks ( osns ) are increasingly often used to let users base trust decisions on the existence and the strength of social relationships . while most osns allow users to discover the length of the social path to other users ,... |
1109.2239 | i | a central goal in systems neuroscience is to determine what underlying principles might shape sensory processing in the nervous system . several coding optimization principles have been proposed , including redundancy reduction @xcite , and information maximization @xcite , which have both enjoyed some successes in p... | sparse coding algorithms trained on natural images can accurately predict the features that excite visual cortical neurons , but it is not known whether such codes can be learned using biologically realistic plasticity rules . we further prove , mathematically , that sparseness and decorrelation are the key ingredients... | sparse coding algorithms trained on natural images can accurately predict the features that excite visual cortical neurons , but it is not known whether such codes can be learned using biologically realistic plasticity rules . we have developed a biophysically motivated spiking network , relying solely on synaptically ... |
1504.06474 | i | sparse matrix - vector multiplication ( spmv ) is perhaps the most widely - used non - trivial sparse basic linear algebra subprogram ( blas ) in computational science and modeling . the operation multiplies a sparse matrix @xmath0 of size @xmath1 by a dense vector @xmath2 of size @xmath3 and gives a dense vector @xmat... | , we propose a compressed sparse row ( csr ) format based spmv algorithm utilizing both types of cores in a cpu - gpu heterogeneous processor . on three heterogeneous processors from intel , amd and nvidia , using 20 sparse matrices as a benchmark suite , the experimental results show that our method obtains significan... | sparse matrix - vector multiplication ( spmv ) is a central building block for scientific software and graph applications . recently , heterogeneous processors composed of different types of cores attracted much attention because of their flexible core configuration and high energy efficiency . in this paper , we propo... |
1307.1021 | i | models of spontaneous wave function collapse @xcite explicitly modify the schrdinger equation . new terms are added to the usual quantum hamiltonian which describe the nonlinear interaction between any system and a classical noise field . the effect of the new terms is to collapse the wave function in space . they are... | each particle interacts with a noise field that induces the collapse of its wave function . as a consequence of this interaction , when the particle is electrically charged , it radiates . as discussed in , the formula for the emission rate , to first perturbative order , contains two terms : one is proportional to th... | spontaneous photon emission in the continuous spontaneous localization ( csl ) model is studied one more time . in the csl model each particle interacts with a noise field that induces the collapse of its wave function . as a consequence of this interaction , when the particle is electrically charged , it radiates . as... |
1011.0748 | i | how a specific trading mechanism effects on the price formation is one of the essential queries to understand the process and outcomes of exchanging assets under a given concrete rule . to investigate the issue , a lot of studies concerning the micro - structure of markets have been done in various research fields @xci... | statistical properties of order - driven double - auction markets with bid - ask spread are investigated through the dynamical quantities such as response function . we first attempt to utilize the so - called _ madhavan - richardson - roomans model _ ( mrr for short ) to simulate the stochastic process of the price - ... | statistical properties of order - driven double - auction markets with bid - ask spread are investigated through the dynamical quantities such as response function . we first attempt to utilize the so - called _ madhavan - richardson - roomans model _ ( mrr for short ) to simulate the stochastic process of the price - ... |
1011.0748 | i | in this paper , statistical properties of double - auction markets with bid - ask spread were investigated through the response function . we first attempted to utilize the so - called _ madhavan - richardson - roomans model _ ( mrr for short ) to simulate the stochastic process of the price - change in empirical data ... | especially , we confirm that the stochastic nature of the bid - ask spread causes apparent deviations from a linear relationship between the and the auto - correlation function , namely , . to make the microscopic model of double - auction markets having stochastic bid - ask spread , we use the minority game with a fin... | statistical properties of order - driven double - auction markets with bid - ask spread are investigated through the dynamical quantities such as response function . we first attempt to utilize the so - called _ madhavan - richardson - roomans model _ ( mrr for short ) to simulate the stochastic process of the price - ... |
1311.3666 | i | the cosmic microwave background reveals the earliest observable structure in the universe , which dates back to the epoch of recombination at @xmath17 . the next most distant observable structure represents the population of galaxies and quasars at @xmath18 . the interval between @xmath19 and @xmath16 contains many lan... | only one quasar has been discovered , namely the quasar ulas j1120 + 0641 , using near - infrared imaging . here we report the discovery of three new quasars in 332deg of the visible and infrared survey telescope for astronomy kilo - degree infrared galaxy ( viking ) survey , thus extending the number from 1 to 4 . th... | studying quasars at the highest redshifts can constrain models of galaxy and black hole formation , and it also probes the intergalactic medium in the early universe . optical surveys have to date discovered more than 60 quasars up to , a limit set by the use of the-band and ccd detectors . only one quasar has been dis... |
1311.3666 | i | we used the viking near - infrared imaging survey to search for quasars above a redshift @xmath57 . we analyzed 332deg@xmath4 of viking data down to a median 7@xmath209 @xmath42-band depth of @xmath212 . we employed two sets of color criteria to select potential quasars at high redshift . our conservative color criter... | near - infrared spectroscopy revealed the emission line in all three objects . the quasars are powered by black holes with masses of . in our probed redshift range of we can set a lower limit on the space density of supermassive black holes ofmpc . we do not find evidence for a steeper decline in the space density of q... | studying quasars at the highest redshifts can constrain models of galaxy and black hole formation , and it also probes the intergalactic medium in the early universe . optical surveys have to date discovered more than 60 quasars up to , a limit set by the use of the-band and ccd detectors . only one quasar has been dis... |
math0107002 | i | the spectral scale was introduced by the present authors and nik weaver in @xcite and further developed by the authors in @xcite . it is defined for any finite set of self - adjoint operators in a finite von neumann algebra . the main theme in @xcite and @xcite is that full spectral information about real linear combin... | suppose that is a linear operator acting on an-dimensional complex hilbert space , and let denote the normalized trace on . set and , and write for the the spectral scale of with respect to . we show that contains full information about , the-numerical range of for each . for example , we show in theorem 3.4 that the p... | suppose that is a linear operator acting on an-dimensional complex hilbert space , and let denote the normalized trace on . set and , and write for the the spectral scale of with respect to . we show that contains full information about , the-numerical range of for each . we then use our previous work on spectral scale... |
1307.7785 | i | coevolution of the dynamics and topology of networks is widely observed in diverse systems from cellular biology to social networks @xcite . in the brain , the spiking dynamics of neurons depends on how they are connected . on the other hand , the connectivity can be modified by the spiking activity . the connections (... | synfire chains are thought to underlie precisely - timed sequences of spikes observed in various brain regions and across species . how they are formed is not understood . here potentiation decay is the gradual , activity - independent reduction of synaptic weights over time . we show that potentiation decay enables a ... | synfire chains are thought to underlie precisely - timed sequences of spikes observed in various brain regions and across species . how they are formed is not understood . here we analyze self - organization of synfire chains through the spike - timing dependent plasticity ( stdp ) of the synapses , axon remodeling , a... |
1307.7785 | c | in large recurrent networks with stdp , axon - remodeling and an activity - independent potentiation decay of synapses , we observed emergence of long , stereotypical sequences of spikes . the sequences are produced by stable synfire chain topologies that self - organize via a stochastic growth process . we studied the... | we analyze self - organization of synfire chains through the spike - timing dependent plasticity ( stdp ) of the synapses , axon remodeling , and potentiation decay of synaptic weights in networks of neurons driven by noisy external inputs and subject to dominant feedback inhibition . periodic stimulation of a subset o... | synfire chains are thought to underlie precisely - timed sequences of spikes observed in various brain regions and across species . how they are formed is not understood . here we analyze self - organization of synfire chains through the spike - timing dependent plasticity ( stdp ) of the synapses , axon remodeling , a... |
1205.2138 | r | the nucleus @xmath100120 is predicted to be a spherical doubly magic nucleus in cdft @xcite . its potential energy surface in the @xmath101 plane is shown in fig . [ pes-2d-6panel ] . it is interesting to compare it with the pes of the nucleus @xmath102pu shown in fig.[pes-2d ] . these two pes s are representative exam... | systematic calculations of fission barriers allowing for triaxial deformation are performed for even - even superheavy nuclei with charge number using three classes of covariant density functional models . the outer fission barriers are considerably affected by triaxiality and octupole deformation . general trends of t... | systematic calculations of fission barriers allowing for triaxial deformation are performed for even - even superheavy nuclei with charge number using three classes of covariant density functional models . the softness of nuclei in the triaxial plane leads to an emergence of several competing fission pathes in the regi... |
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