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1111.4959 | i | we have shown that the physics of systems with heavy fermions is determined by the extended quasiparticle paradigm . in contrast to the paradigm that the quasiparticle effective mass is a constant , within the extended quasiparticle paradigm the effective mass of new quasiparticles strongly depends on the temperature ,... | in contrast to the landau paradigm stating that the quasiparticle effective mass is a constant , the effective mass of new quasiparticles strongly depends on temperature , magnetic field , pressure , and other parameters . our observations are in good agreement with experimental facts and show that fcqpt is responsible... | strongly correlated fermi systems are among the most intriguing , best experimentally studied and fundamental systems in physics . there is , however , lack of theoretical understanding in this field of physics . the ideas based on the concepts like kondo lattice and involving quantum and thermal fluctuations at a quan... |
1407.2757 | r | figure [ fig - sp ] shows spectra of the supermaser observed in 18 epochs of the regular astrometry observations from 2011 to 2012 , and figure [ fig - time ] shows time variations of the flux density , velocity width , and peak velocity for all the observed epochs including both 18 epochs of the regular astrometry and... | the supermaser is located close to the methylformate ( hcooch ) line and continuum emission peaks in the orion compact ridge detected by alma , atacama large millimeter / submillimeter array . the broader velocity range of the weak hcooch emission at the supermaser position would be an evidence of a shock front . on th... | the 22 ghz ho maser in orion kl has shown extraordinary burst events in 1979 - 1985 and 1998 - 1999 , sometimes called supermaser . we have conducted monitoring observations of the supermaser in orion kl using vera , vlbi exploration of radio astrometry , in the current third burst since 2011 march . three flux maxi... |
1407.2757 | c | in this paper , we report results of continued monitoring observations of the supermaser with vera for more than 5 years . we also acquire follow - up observational data with alma of submillimeter continuum emissions and h@xmath0o lines at 321 ghz to reveal characteristics of the supermaser and their environments . i... | three flux maxima are detected in 2011 and 2012 with rising and falling timescales of 2 - 7 months . it can be explained qualitatively by one of the theoretical ho excitation models without extraordinary conditions . our results support a scenario that the supermaser is excited in the dense gas interacting with the lo... | the 22 ghz ho maser in orion kl has shown extraordinary burst events in 1979 - 1985 and 1998 - 1999 , sometimes called supermaser . we have conducted monitoring observations of the supermaser in orion kl using vera , vlbi exploration of radio astrometry , in the current third burst since 2011 march . three flux maxi... |
1407.2757 | i | we have carried out astrometric monitoring observations of the bursting 22 ghz h@xmath0o maser feature , called supermaser , in orion kl using vera since 2011 march . combined with spectral line data obtained as a fringe - finder , we reveal a time variation of the supermaser for more than 5 years . in addition , we... | we have conducted monitoring observations of the supermaser in orion kl using vera , vlbi exploration of radio astrometry , in the current third burst since 2011 march . time variations of the supermaser seem symmetric for all of the active phases . the maximum total flux density of 135000 jy is observed in 2012 june... | the 22 ghz ho maser in orion kl has shown extraordinary burst events in 1979 - 1985 and 1998 - 1999 , sometimes called supermaser . we have conducted monitoring observations of the supermaser in orion kl using vera , vlbi exploration of radio astrometry , in the current third burst since 2011 march . three flux maxi... |
1504.04567 | i | [ intro ] in the present work we continue our theoretical studies @xcite of multicharged tungsten ions . the spectroscopic parameters of systems with the open 4d - shell are investigated . extensive interest in highly - charged tungsten ions @xcite is caused by its unique physical properties . metallic tungsten is w... | the _ ab initio _ quasirelativistic hartree - fock method developed specifically for the calculation of spectroscopic parameters of heavy atoms and highly charged ions was used to derive spectral data for the multicharged tungsten ion w . the energy level spectra , radiative lifetimes , lande-factors are calculated for... | the _ ab initio _ quasirelativistic hartree - fock method developed specifically for the calculation of spectroscopic parameters of heavy atoms and highly charged ions was used to derive spectral data for the multicharged tungsten ion w . the configuration interaction method was applied to include the electron - correl... |
1111.1603 | c | motivated by the fact that our current understanding on the abundances of alkali elements in a - type stars is considerably insufficient , we conducted a comprehensive non - lte analysis to establish the photospheric abundances of na , li , and k for 24 selected sharp - lined a - type stars ( @xmath0 km s@xmath1 , 70... | the abundances of alkali elements ( li , na , and k ) were determined from the li i 6708 , na i 5682/5688 , and k i 7699 lines by taking into account the non - lte effect for 24 sharp - lined a - type stars ( km s , 7000 k 10000 k , many showing am peculiarities to different degrees ) , based on high - disper... | the abundances of alkali elements ( li , na , and k ) were determined from the li i 6708 , na i 5682/5688 , and k i 7699 lines by taking into account the non - lte effect for 24 sharp - lined a - type stars ( km s , 7000 k 10000 k , many showing am peculiarities to different degrees ) , based on high - disper... |
1305.3174 | i | let @xmath6 be a @xmath7-dimensional closed , connected , oriented manifold with an effective @xmath8-dimensional ( i.e. , half - dimensional ) torus @xmath9-action . we call @xmath6 ( or @xmath10 ) a _ torus manifold _ if @xmath11 ( see @xcite ) , where @xmath12 is the set of fixed points . a toric manifold ( i.e. , a... | the aim of this paper is to classify simply connected-dimensional torus manifolds with vanishing odd degree cohomology . it is shown that there is a one - to - one correspondence between equivariant diffeomorphism types of these manifolds and-valent labelled graphs , called torus graphs introduced by maeda - masuda - p... | the aim of this paper is to classify simply connected-dimensional torus manifolds with vanishing odd degree cohomology . it is shown that there is a one - to - one correspondence between equivariant diffeomorphism types of these manifolds and-valent labelled graphs , called torus graphs introduced by maeda - masuda - p... |
nucl-th0505007 | r | for the wave functions of @xmath2b that form the basis of the cdcc expansion of the three - body system we make the following assumptions . we assume that the ground state wave function of @xmath2b , with the @xmath128-component @xmath143 of the total spin @xmath222 of it , is given by @xmath223_{2m_0 } + w_2 \left[i y... | the main result of the present paper is ev b. the error consists of 8.4% experimental systematic error and the error due to the ambiguity in the s - wave-be scattering length . this value of differs from the one extracted with the first - order perturbation theory including coulomb breakup by dipole transitions : ev b.... | the astrophysical factor forbe()b at zero energy , , is determined from an analysis ofpb(b ,be)pb at 52 mev / nucleon by means of the method of continuum - discretized coupled - channels ( cdcc ) taking account of all nuclear and coulomb breakup processes . the asymptotic normalization coefficient ( anc ) method is use... |
nucl-th0505007 | i | the principal result of the present paper is the value of @xmath3 of @xmath325 ( theo ) @xmath306 ( expt ) ev b obtained by an analysis of the cross section of the @xmath2b breakup reaction @xmath4pb(@xmath2b , @xmath5be)@xmath4pb at 52 mev / nucleon measured at riken @xcite by means of the method of continuum - discr... | the astrophysical factor forbe()b at zero energy , , is determined from an analysis ofpb(b ,be)pb at 52 mev / nucleon by means of the method of continuum - discretized coupled - channels ( cdcc ) taking account of all nuclear and coulomb breakup processes . the value of ev b obtained is consistent with the previous one... | the astrophysical factor forbe()b at zero energy , , is determined from an analysis ofpb(b ,be)pb at 52 mev / nucleon by means of the method of continuum - discretized coupled - channels ( cdcc ) taking account of all nuclear and coulomb breakup processes . the asymptotic normalization coefficient ( anc ) method is use... |
1202.0134 | i | historically , radio source counts has been a key observational probe of cosmology , more specifically of the geometry of the universe . in a euclidean universe the volume scales with distance as @xmath7 whereas the flux density scales as @xmath8 , which means that the integral number of sources ( for a population of n... | the australia telescope low - brightness survey ( atlbs ; ) regions have been mosaic imaged at a radio frequency of 1.4 ghz with angular resolution and 72 jy beam rms noise . , they do not require any changes in the radio source population down to the limit of the survey . | the australia telescope low - brightness survey ( atlbs ; ) regions have been mosaic imaged at a radio frequency of 1.4 ghz with angular resolution and 72 jy beam rms noise . the images ( centered at ra : , dec : and ra : , dec : ( j2000 epoch ) ) cover 8.42 square degrees sky area and have no artifacts or imaging er... |
1202.0134 | i | high - resolution radio images of the atlbs survey regions are presented , with beam fwhm of @xmath0 . the wide field mosaic images covering @xmath20 square degrees sky area with rms noise @xmath24jy beam@xmath2 are of exceptional quality in that there are no imaging errors or artifacts above the thermal noise over th... | the images ( centered at ra : , dec : and ra : , dec : ( j2000 epoch ) ) cover 8.42 square degrees sky area and have no artifacts or imaging errors above the image thermal noise . the work suggests that automated image analysis for counts may be dependent on the ability of the imaging to reproduce connecting emission w... | the australia telescope low - brightness survey ( atlbs ; ) regions have been mosaic imaged at a radio frequency of 1.4 ghz with angular resolution and 72 jy beam rms noise . the images ( centered at ra : , dec : and ra : , dec : ( j2000 epoch ) ) cover 8.42 square degrees sky area and have no artifacts or imaging er... |
1502.02524 | i | it is generally believed that there is a supermassive black hole ( bh ) at the center of an active galactic nucleus ( agn ) ; the gravitational potential of the bh is the ultimate energy source of the agn . the accreted matter of a bh forms an accretion disk and loses angular momentum through viscous or turbulent proce... | the broadband spectral energy distributions ( seds ) of 18 gev flat spectrum radio quasars ( fsrqs ) are collected and compiled from literature , in which both the jet emission and the accretion disk radiation can be observed , in order to investigate the correlations among their jet power ( ) , accretion disk luminosi... | the broadband spectral energy distributions ( seds ) of 18 gev flat spectrum radio quasars ( fsrqs ) are collected and compiled from literature , in which both the jet emission and the accretion disk radiation can be observed , in order to investigate the correlations among their jet power ( ) , accretion disk luminosi... |
1502.02524 | i | a sed sample of 18 gev - fsrqs , in which the significant blue bumps from the accretion disk radiation are observed and the blr luminosities ( @xmath2 ) of 13 gev - fsrqs are available , is collected and compiled from literature . on the basis of the sed fits with the jet radiation and accretion disk radiation models ,... | no correlation between with either or is found . with a sub - sample of for 13 gev fsrqs of some gev fsrqs is higher than , but of all the gev fsrqs is lower than the accretion power of black hole ( bh ) , which is estimated by , indicating that the total accretion power of bh is sufficient to drive the jets in these ... | the broadband spectral energy distributions ( seds ) of 18 gev flat spectrum radio quasars ( fsrqs ) are collected and compiled from literature , in which both the jet emission and the accretion disk radiation can be observed , in order to investigate the correlations among their jet power ( ) , accretion disk luminosi... |
1402.1425 | i | leaf powers are a family of graph classes that has been introduced by nishimura etal . @xcite to model the problem of reconstructing phylogenetic trees . in particular , a given finite simple graph @xmath2 is called the @xmath1-leaf power of a tree @xmath3 for some @xmath17 , if @xmath4 is the set of leaves in @xmath3 ... | the class of-leaf powers consists of graphs that have a-leaf root , that is , a tree with leaf set , where , if and only if the-distance between and is at most . structure and linear time recognition algorithms have been found for- ,- ,- , and , to some extent ,-leaf powers , and it is known that the union of all-leaf ... | the class of-leaf powers consists of graphs that have a-leaf root , that is , a tree with leaf set , where , if and only if the-distance between and is at most . structure and linear time recognition algorithms have been found for- ,- ,- , and , to some extent ,-leaf powers , and it is known that the union of all-leaf ... |
astro-ph0007262 | i | in paper i ( wielen et al . 1999b ) , we have shown that the combination of the data of the hipparcos astrometric satellite ( esa 1997 ) with ground - based results ( such as the fk5 ) is able to provide for many stars individual proper motions which are significantly more accurate than the hipparcos proper motions the... | the combination of ground - based astrometric compilation catalogues , such as the fk5 or the gc , with the results of the esa astrometric satellite hipparcos produces for many thousands of stars proper motions which are significantly more accurate than the proper motions derived from the hipparcos observations alone .... | the combination of ground - based astrometric compilation catalogues , such as the fk5 or the gc , with the results of the esa astrometric satellite hipparcos produces for many thousands of stars proper motions which are significantly more accurate than the proper motions derived from the hipparcos observations alone .... |
math0702892 | i | let @xmath3 be a convex body in @xmath7 . the _ covariogram _ @xmath5 of @xmath3 is the function @xmath8 where @xmath9 and @xmath10 denotes volume in @xmath7 . this functional , which was introduced by matheron in his book @xcite on random sets , is also sometimes called the _ set covariance _ , and it coincides with t... | positive answers to matheron s question have been obtained for large classes of planar convex bodies , while for there are both positive and negative results . one of the purposes of this paper is to sharpen some of the known results on matheron s conjecture indicating how much of the covariogram information is need... | the covariogram of a convex body is the function which associates to each the volume of the intersection of with matheron asked whether determines , up to translations and reflections in a point . positive answers to matheron s question have been obtained for large classes of planar convex bodies , while for there are ... |
0704.2706 | i | in this paper , we present a number of results concerning a dynamical version of coalescing random walks , which was recently introduced in @xcite . our results concern times of hausdorff dimension less than one where the system of coalescing walks behaves exceptionally . the results are analogous to and were motivate... | the dynamical discrete web ( ddw ) , introduced in recent work of howitt and warren , is a system of coalescing simple symmetric one - dimensional random walks which evolve in an extra continuous dynamical time parameter . the evolution is by independent updating of the underlying bernoulli variables indexed by discret... | the dynamical discrete web ( ddw ) , introduced in recent work of howitt and warren , is a system of coalescing simple symmetric one - dimensional random walks which evolve in an extra continuous dynamical time parameter . the evolution is by independent updating of the underlying bernoulli variables indexed by discret... |
0812.2483 | i | gamma - ray bursts ( grbs ) are brief , intense flashes of @xmath0-rays originating at cosmological distances , and they are the most luminous objects in the universe . they also have broadband afterglows long - lasting after the @xmath0-ray radiation has ceased . it has been established that the bursts and afterglows ... | the emission mechanism and the origin and structure of magnetic fields in gamma - ray burst ( grb ) jets are among the most important open questions concerning the nature of the central engine of grbs . in spite of extensive observational efforts , these questions remain to be answered and are difficult or even impossi... | the emission mechanism and the origin and structure of magnetic fields in gamma - ray burst ( grb ) jets are among the most important open questions concerning the nature of the central engine of grbs . in spite of extensive observational efforts , these questions remain to be answered and are difficult or even impossi... |
0812.2483 | i | recently there has been an increasing interest in the measurement of x - ray and @xmath0-ray polarization , and the observational techniques can now achieve significant sensitivity in the relevant energy bands . several polarimetry mission concepts , such as _ poet _ , are being planned . the _ poet _ concept has two p... | if launched , missions of this kind would finally provide definitive measurements of grb polarizations . we perform monte carlo simulations to derive the distribution of grb polarizations in three emission models ; the synchrotron model with a globally ordered magnetic field ( so model ) , the synchrotron model with a ... | the emission mechanism and the origin and structure of magnetic fields in gamma - ray burst ( grb ) jets are among the most important open questions concerning the nature of the central engine of grbs . in spite of extensive observational efforts , these questions remain to be answered and are difficult or even impossi... |
astro-ph0501182 | i | clusters of galaxies have received intensive observational study over the last decades . this effort has lead to clear results on the way galaxy properties , such as morphology and star formation rate , vary within clusters and how these properties evolve between clusters at different redshifts ( * ? ? ? * ; * ? ? ? * ... | the evolution of galaxies in groups may have important implications for the evolution of the star formation history of the universe , since many processes which operate in groups may suppress star formation and the fraction of galaxies in bound groups grows rapidly between and the present day . in this paper , we prese... | the evolution of galaxies in groups may have important implications for the evolution of the star formation history of the universe , since many processes which operate in groups may suppress star formation and the fraction of galaxies in bound groups grows rapidly between and the present day . in this paper , we prese... |
cond-mat0406202 | i | quantum turbulence , the seemingly chaotic motion of quantized vortex lines in a disordered network , is a prominent characteristic of superfluid @xmath1he - ii , where it has been known to exist for almost half a century.@xcite up to recently , @xmath1he - ii was the only superfluid system in which this phenomenon has... | the experimental investigation of superfluid turbulence inhe - b is generally not possible with the techniques which have been developed forhe - ii . we describe a new method by which a transient burst of turbulent vortex expansion can be generated inhe - b . pacs numbers : 47.37 , 67.40 , 67.57 . | the experimental investigation of superfluid turbulence inhe - b is generally not possible with the techniques which have been developed forhe - ii . we describe a new method by which a transient burst of turbulent vortex expansion can be generated inhe - b . it is based on the injection of a few vortex loops into rota... |
nucl-ex0412039 | i | an in - flight fragment separation apparatus can be used in two ways : * as a recoil spectrometer , to measure production cross sections or kinematics properties of the fragments ; * as a separation device , aiming at producing high - purity secondary beams of nuclides . the fragment recoil separator ( frs ) @xcite... | three topics are covered . first , a specific set - up for ionization chambers , based on a very large gas thickness , is presented . the possibility to use a thick layer of matter ( a degrader ) as a passive measurement device to identify the nuclear charge and the ionic charge state of fragments is discussed . the co... | the feasibility of low - energy fragmentation experiments using a magnetic spectrometer is discussed . the main challenge is the multiplicity of the ionic charge states , which can hamper the identification in both z and a of the fragments . three topics are covered . first , a specific set - up for ionization chambers... |
1509.05427 | i | a major outstanding goal in cosmology is to piece together the history of the universe between cosmic dawn , the emergence of the first stars and galaxies , and the end of reionization , when the radiation from these objects had ionized the intergalactic medium ( igm ) . advances in numerical techniques , combined with... | the first astrophysical objects shaped the cosmic environment by reionizing and heating the intergalactic medium ( igm ) . in particular , x - rays are very efficient at heating the igm before it became completely ionized , an effect that can be measured through the redshifted 21 cm line of neutral hydrogen . high - ma... | the first astrophysical objects shaped the cosmic environment by reionizing and heating the intergalactic medium ( igm ) . in particular , x - rays are very efficient at heating the igm before it became completely ionized , an effect that can be measured through the redshifted 21 cm line of neutral hydrogen . high - ma... |
1509.05427 | r | here , we summarize the findings of our @xmath1-body simulations , focusing in particular on the properties of the most compact binaries found for each set of runs . [ sec : results ] we ran 20 simulations for @xmath97 and 23 for @xmath99 . for @xmath97 , in 12 out of 20 runs , the two most massive stars ( @... | we run two sets of calculations : one in which stars form in small groups of five in nearly keplerian initial orbits , and another in which two such groups collide ( an expected outcome of mergers of host protogalaxies ) . we find that hmxbs form at a rate of one per in newly born stars , and that they emit with a powe... | the first astrophysical objects shaped the cosmic environment by reionizing and heating the intergalactic medium ( igm ) . in particular , x - rays are very efficient at heating the igm before it became completely ionized , an effect that can be measured through the redshifted 21 cm line of neutral hydrogen . high - ma... |
astro-ph9710182 | i | what has been presented in the preceding sections represents the first comprehensive hi study of the _ isolated _ , edge - on , infrared - bright galaxy ngc 3044 . the ir brightness is partly due to proximity , since the massive star formation rate is a factor of 5 lower than that of m 82 ( 5.1 ) . the hi distributi... | the first detailed vla mapping of the neutral hydrogen distribution in the _ isolated _ , edge - on spiral galaxy ngc 3044 is presented . we have modelled the hi spectra in order to derive its global density and velocity distributions . an hi scale height of 420 pc is thus found . the approaching ( northwest ) side of ... | the first detailed vla mapping of the neutral hydrogen distribution in the _ isolated _ , edge - on spiral galaxy ngc 3044 is presented . physical parameters such as , , etc . determined for this galaxy are typical for galaxies of its morphological class ( sbc ) . we have modelled the hi spectra in order to derive its ... |
1510.03486 | i | in the hierarchical structure formation paradigm , merging is among the dominant mechanisms by which galaxy clusters grow . therefore , detailed studies of merging clusters shed light on the growth of cosmological structures . apart from cosmological interests , merging clusters are also receiving growing attention as ... | the galaxy cluster rx j0603.3 + 4214 at is one of the rarest clusters boasting an extremely large ( mpc ) radio relic . because of the remarkable morphology of the relic , the cluster is nicknamed the toothbrush cluster " . although the cluster s underlying mass distribution is one of the critical pieces of inform... | the galaxy cluster rx j0603.3 + 4214 at is one of the rarest clusters boasting an extremely large ( mpc ) radio relic . because of the remarkable morphology of the relic , the cluster is nicknamed the toothbrush cluster " . although the cluster s underlying mass distribution is one of the critical pieces of inform... |
1510.03486 | c | because we make an approximation that the mass of rx j0603.3 + 4214 is dominated by the two halos associated with the two x - ray peaks , it is useful to examine the validity of the assumption by an independent method . we employ aperture mass densitometry , which allows us to estimate total projected masses within a... | our mass reconstruction reveals that the cluster is composed of complicated dark matter substructures closely tracing the galaxy distribution , in contrast , however , with the relatively simple binary x - ray morphology . the southern mass peak is offset toward the south with respect to the corresponding x - ray peak ... | the galaxy cluster rx j0603.3 + 4214 at is one of the rarest clusters boasting an extremely large ( mpc ) radio relic . because of the remarkable morphology of the relic , the cluster is nicknamed the toothbrush cluster " . although the cluster s underlying mass distribution is one of the critical pieces of inform... |
1510.03486 | c | we have presented detailed weak - lensing studies of the toothbrush " relic cluster rx j0603.3 + 4214 with _ hst _ and subaru imaging . together with the sausage " relic cluster ciza j2242.8 + 5301 , rx j0603.3 + 4214 has been known for its giant ( @xmath1mpc ) radio relic , whose peculiar morphology gives the ... | comparison of the current weak - lensing result with the x - ray , galaxy , and radio relic suggests that perhaps the dominant mechanism responsible for the observed relic may be a high - speed collision of the two most massive subclusters , although the peculiarity of the morphology necessitates involvement of additio... | the galaxy cluster rx j0603.3 + 4214 at is one of the rarest clusters boasting an extremely large ( mpc ) radio relic . because of the remarkable morphology of the relic , the cluster is nicknamed the toothbrush cluster " . although the cluster s underlying mass distribution is one of the critical pieces of inform... |
astro-ph0408460 | i | the study of the emission characteristics from rotation powered pulsars has been a subject of long standing interest . our knowledge of the fundamental properties ( e.g. , mass , spin , and magnetic field ) of the underlying neutron star stems from detailed spectral and timing investigations . to facilitate an understa... | the relation for the pulsed component , on the other hand , is consistent with a magnetospheric emission model . such wind nebulae can contribute to the non - thermal symmetric emission morphology ( point - like ) and elongated emission morphology ( tail - like ) from sources similar to geminga and psr b1757 - 24 . | the general properties of the non - thermal non - pulsed x - ray emission of rotation powered pulsars are investigated in the context of a pulsar wind nebula model . an examination of the observed x - ray emission from a sample of 23 pulsars in the energy range between 2 - 10 kev reveals that the relation of x - ray lu... |
astro-ph0408460 | i | the non - thermal non - pulsed x - ray emission of rotation powered pulsars has been investigated in the context of emission from a pulsar wind nebula . we have confirmed that this emission can significantly contribute to the total x - ray emission , thereby , increasing the x - ray emission above that produced in the ... | the general properties of the non - thermal non - pulsed x - ray emission of rotation powered pulsars are investigated in the context of a pulsar wind nebula model . in addition , the photon spectral index , , was found to be correlated to the conversion efficiency of spin down power to non - pulsed x - ray emission wi... | the general properties of the non - thermal non - pulsed x - ray emission of rotation powered pulsars are investigated in the context of a pulsar wind nebula model . an examination of the observed x - ray emission from a sample of 23 pulsars in the energy range between 2 - 10 kev reveals that the relation of x - ray lu... |
1512.01473 | c | as mentioned in the introduction , the glg model is a very flexible family of distributions which is used to describe asymmetrically distributed data in many real applications . in this paper , we considered estimators which are simultaneously robust and efficient for aft models , when the errors follow a glg distribut... | the generalized log - gamma ( glg ) model is a very flexible family of distributions to analyze datasets in many different areas of science and technology . in this paper , we propose estimators which are simultaneously highly robust and highly efficient for the parameters of a glg distribution in the presence of censo... | the generalized log - gamma ( glg ) model is a very flexible family of distributions to analyze datasets in many different areas of science and technology . in this paper , we propose estimators which are simultaneously highly robust and highly efficient for the parameters of a glg distribution in the presence of censo... |
astro-ph0509028 | r | as mentioned above , our strategy in testing our jet models against the data was to allow the maximum number of model parameters to vary freely during the fit . this allowed us to explore which parameters had the greatest influence on the fits . several parameters settled on fairly similar values for both sources and a... | the hard state of x - ray binaries ( xrbs ) is characterized by a power law spectrum in the x - ray band , and a flat / inverted radio / ir spectrum associated with occasionally imaged compact jets . are very similar to the derived plasma conditions at the jet footpoints . here we explore the question of whether the ` ... | the hard state of x - ray binaries ( xrbs ) is characterized by a power law spectrum in the x - ray band , and a flat / inverted radio / ir spectrum associated with occasionally imaged compact jets . it has generally been thought that the hard x - rays result from compton upscattering of thermal accretion disk photons ... |
1108.3764 | i | diphoton final states represent a very important testing ground for the standard model ( sm ) , for example they may be one of the main discovery channels for the higgs boson searches at the cern lhc . moreover , similar to the case of dileptons , the inclusive production of two - photon high mass resonance states at t... | the high mass neutral quantum states envisaged by theories of physics beyond the standard model can at the hadron colliders reveal themselves through their decay into a pair of photons . once such a peak in the diphoton invariant mass distribution is discovered , the determination of its spin through the distinctive ph... | the high mass neutral quantum states envisaged by theories of physics beyond the standard model can at the hadron colliders reveal themselves through their decay into a pair of photons . once such a peak in the diphoton invariant mass distribution is discovered , the determination of its spin through the distinctive ph... |
astro-ph0301394 | i | at visual wavelengths , the dusty bipolar `` homunculus '' ejecta structure around @xmath0 car is primarily a hollow reflection nebula ( see thackeray 1961 ; visvanathan 1967 ; meaburn 1987 ; hillier & allen 1992 ; hamann et al . 1994 ; etc . ) . therefore , by observing localized parts of the homunculus , _ we can in... | the homunculus reflection nebula around carinae provides a rare opportunity to observe the spectrum of a star from more than one direction . in the case of car , we present stis spectra of several positions in the homunculus , showing directly that car has an aspherical stellar wind . . the wind geometry and its variab... | the homunculus reflection nebula around carinae provides a rare opportunity to observe the spectrum of a star from more than one direction . in the case of car , the nebula s geometry is known well enough to infer how line profiles vary with latitude . we present stis spectra of several positions in the homunculus , sh... |
math0303218 | i | in a series of two papers , the present one and the second one by the second author @xcite , we continue the study of the hurwitz problem @xcite concerning counting ramified coverings of the @xmath1-sphere . roughly speaking , this problem can be formulated as follows : _ given a set of fixed ramification points o... | the hurwitz space is a compactification of the space of rational functions of a given degree . the lyashko - looijenga map assigns to a rational function the set of its critical values . it is known that the number of ramified coverings of by with prescribed ramification points and ramification types is related to the ... | the hurwitz space is a compactification of the space of rational functions of a given degree . the lyashko - looijenga map assigns to a rational function the set of its critical values . it is known that the number of ramified coverings of by with prescribed ramification points and ramification types is related to the ... |
1312.0832 | i | spontaneous breakdown of chiral symmetry ( @xmath4ssb ) @xmath5 characterizes the vacuum and low - energy dynamics of quantum chromodynamics ( qcd ) @xcite . the non - vanishing chiral condensate @xmath6 is considered as one of the order parameters of @xmath7ssb and gives a characteristic scale for hadron physics . @x... | we show that the linear density correction is dominant and the next - to - leading corrections are not so large at the saturation density , while their contributions can be significant in higher densities . we also discuss whether the low energy theorems , the gell - mann oakes renner relation and the glashow | the in - medium pion properties , _ i.e. _ the temporal pion decay constant , the pion mass and the wave function renormalization , in symmetric nuclear matter are calculated in an in - medium chiral perturbation theory up to the next - to - leading order of the density expansion . the chiral lagrangian for the pion - ... |
1312.0832 | i | we have discussed the in - medium pion properties , such as the pion decay constant , the pion mass and the wave function renormalization based on the in - medium chiral perturbation theory . first , we have provided a general formalism of the in - medium chiral perturbation theory and have discussed an expansion in te... | i.e. _ the temporal pion decay constant , the pion mass and the wave function renormalization , in symmetric nuclear matter are calculated in an in - medium chiral perturbation theory up to the next - to - leading order of the density expansion . we carefully define the in - medium state of pion and find that the pion ... | the in - medium pion properties , _ i.e. _ the temporal pion decay constant , the pion mass and the wave function renormalization , in symmetric nuclear matter are calculated in an in - medium chiral perturbation theory up to the next - to - leading order of the density expansion . the chiral lagrangian for the pion - ... |
0806.0552 | c | in the present work a new study has been undertaken of the effects expected from isospin - mixing in nuclear ground - state wave functions on elastic parity - violating electron scattering at momentum transfers extending up to about 1.5 @xmath11 . four n = z 0@xmath7 nuclei have been considered , @xmath1c , @xmath2 mg ... | their ground - state wave functions have been obtained using a self - consistent axially - symmetric mean - field approximation with density - dependent effective two - body skyrme interactions . some differences from previous shell - model calculations appear for the isovector coulomb form factors which play a role in... | the influence of nuclear isospin mixing on parity - violating elastic electron scattering is studied for the even - even , nucleic , mg ,si , ands . their ground - state wave functions have been obtained using a self - consistent axially - symmetric mean - field approximation with density - dependent effective two - bo... |
1609.01050 | i | finding first integrals is fundamental for characterizing a dynamical system . the motion is confined to submanifolds of lower dimensions on which the orbits evolve , providing an intuitive interpretation of the dynamics and reducing the complexity of the system . in addition , conserved quantities are good candidates ... | keplerian orbits appear naturally as particular solutions to the problem . after characterizing the orbits independently , a unified form of the solution these orbits can represent the motion of particles perturbed by solar radiation pressure , of spacecraft with continuous thrust propulsion , and some instances of sch... | the invariance of the lagrangian under time translations and rotations in kepler s problem yields the conservation laws related to the energy and angular momentum . noether s theorem reveals that these same symmetries furnish generalized forms of the first integrals in a special nonconservative case , which approximate... |
1309.2669 | i | in the past decade ultra - cold quantum gases have emerged as ideal candidates for clean and controllable simulation of condensed matter physics @xcite . ultra - cold quantum gases are now created in a variety of configurations in laboratories worldwide . in particular , both bosonic and fermionic atoms can be trapped... | the local quench of a fermi gas , giving rise to the fermi edge singularity and the anderson orthogonality catastrophe , is a rare example of an analytically tractable out of equilibrium problem in condensed matter . it has recently been proposed that the effect could be efficiently simulated in a controlled manner usi... | the local quench of a fermi gas , giving rise to the fermi edge singularity and the anderson orthogonality catastrophe , is a rare example of an analytically tractable out of equilibrium problem in condensed matter . it describes the universal physics which occurs when a localized scattering potential is suddenly intro... |
0908.0650 | i | a flaring activity during the afterglow ( ag ) phase of a gamma ray burst ( grb ) was first observed in the late - time ag of grb 970508 with the narrow field instrument ( nfi ) aboard the bepposax satellite in the x - ray band @xcite , and with ground based telescopes in the optical band @xcite . it was interpreted in... | the many similarities between the prompt emission pulses in gamma ray bursts ( grbs ) and x - ray flares during the fast decay and afterglow phases of grbs suggest a common origin . in the cannonball ( cb ) model of grbs , this common origin is mass accretion episodes of fall - back matter on a newly born compact objec... | the many similarities between the prompt emission pulses in gamma ray bursts ( grbs ) and x - ray flares during the fast decay and afterglow phases of grbs suggest a common origin . in the cannonball ( cb ) model of grbs , this common origin is mass accretion episodes of fall - back matter on a newly born compact objec... |
0908.0650 | i | in the cb model , grbs , xrfs and shbs and their afterglows are produced by the interaction of bipolar jets of highly relativistic plasmoids ( cannonballs ) of ordinary matter , which are ejected in mass accretion episodes on a newly formed compact stellar object , with the radiation and matter that they encounter alon... | we show that the master formulae of the cb model of grbs and shbs , which reproduce very well their prompt emission pulses and their smooth afterglows , seem to reproduce also very well the lightcurves and spectral evolution of the prominent x - ray and optical flares that are well sampled . -1 cm | the many similarities between the prompt emission pulses in gamma ray bursts ( grbs ) and x - ray flares during the fast decay and afterglow phases of grbs suggest a common origin . in the cannonball ( cb ) model of grbs , this common origin is mass accretion episodes of fall - back matter on a newly born compact objec... |
1209.0393 | i | the recent discovery of a particle consistent with the standard model ( sm ) higgs boson , announced by the atlas @xcite and cms @xcite collaborations at cern , is a milestone in particle physics ; adding in quadrature statistical and systematic errors , the mass of the particle turns out to be in the range @xmath1 gev... | the measurements of the higgs boson and top quark masses can be used to extrapolate the standard model higgs potential at energies up to the planck scale . adopting a nnlo renormalization procedure , we : i ) find that electroweak vacuum stability is at present allowed , discuss the associated theoretical and experimen... | the measurements of the higgs boson and top quark masses can be used to extrapolate the standard model higgs potential at energies up to the planck scale . adopting a nnlo renormalization procedure , we : i ) find that electroweak vacuum stability is at present allowed , discuss the associated theoretical and experimen... |
0803.4125 | i | transport phenomena in random media have remained a very active field of research since the discovery of the anderson localization fifty years ago @xcite . for classical systems also , the presence of quenched disorder can induce completely new transport behaviors with respect to pure systems in some regions of paramet... | we obtain that for small , this `` infinite disorder fixed point '' becomes a `` strong disorder fixed point '' with an exponential distribution of renormalized barriers . our conclusion is that in the small force region , the divergence of the averaged trapping time induces strong non - self - averaging effects that i... | the motion of driven interfaces in random media at finite temperature and small external force is usually described by a linear displacement at large times , where the velocity vanishes according to the creep formula as for . in this paper , we question this picture on the specific example of the directed polymer in a ... |
0803.4125 | c | in this paper , we have considered the dynamics of the directed polymer in a two - dimensional random potential in the regime where the temperature @xmath0 is finite and the external force @xmath1 is small . we have explained how the `` infinite disorder fixed point '' that describes the dynamics for @xmath5 becomes a ... | the corresponding distribution of trapping times then only decays as a power - law , where the exponent vanishes as as . we find instead that the motion is only sub - linearly in time , i.e. the asymptotic velocity vanishes . this analysis is confirmed by numerical simulations of a directed polymer with a metric constr... | the motion of driven interfaces in random media at finite temperature and small external force is usually described by a linear displacement at large times , where the velocity vanishes according to the creep formula as for . in this paper , we question this picture on the specific example of the directed polymer in a ... |
hep-ph0701151 | i | among the remaining unknowns in neutrino physics , resolving the neutrino mass hierarchy may be one of the key importance to our understanding of physics of neutrino masses and the lepton flavor mixing @xcite . given the significance of the problem , it is natural that many methods are proposed for determining the mass... | , we give a complete description and physics understanding of the method . the key feature of the method is to detect advancement ( normal ) or retardation ( inverted ) of the phase of the atmospheric - scale oscillation relative to the solar - scale oscillation . the unique feature of this setup is the ultra - monochr... | the neutrino mass hierarchy can be determined , in principle , by measuring a phase in the disappearance oscillation probability in vacuum , without relying on the matter effect , using a single channel . this phase is not the same for the normal and inverted neutrino mass spectra . in this paper , we give a complete d... |
hep-ph0701151 | c | in this paper , we have shown that the neutrino mass hierarchy can be determined only by _ a single experiment _ based on resonant @xmath28 absorption reaction enhanced by the mssbauer effect . in its first stage , @xmath11 must be accurately determined by @xmath18910 m measurements . in the second stage of the experim... | the neutrino mass hierarchy can be determined , in principle , by measuring a phase in the disappearance oscillation probability in vacuum , without relying on the matter effect , using a single channel . we then show that this method can be realized with the recently proposed resonant absorption reaction enhanced by m... | the neutrino mass hierarchy can be determined , in principle , by measuring a phase in the disappearance oscillation probability in vacuum , without relying on the matter effect , using a single channel . this phase is not the same for the normal and inverted neutrino mass spectra . in this paper , we give a complete d... |
1607.05205 | i | the cold atom community has revived the study of the approach to thermal equilibrium for large isolated quantum systems . we refer to @xcite and references therein on previous work . most accessible , both numerically and experimentally , are lattice systems in one dimension . one dimension is peculiar , since there ar... | the nonequilibrium dynamics of anharmonic chains is studied by imposing an initial domain - wall state , in which the two half lattices are prepared in equilibrium with distinct parameters . their typical fluctuations should be of size and have a tracy - widom gue distributed amplitude . the proper extension to anharmo... | the nonequilibrium dynamics of anharmonic chains is studied by imposing an initial domain - wall state , in which the two half lattices are prepared in equilibrium with distinct parameters . we analyse the riemann problem for the corresponding euler equations and , in specific cases , compare with molecular dynamics . ... |
1603.05463 | i | analysis of the nonlinear schrdinger ( nls ) and wave equations with double - well , multi - well , or periodic potentials constitutes a continuously developing subject @xcite . these nonlinear partial differential equations ( pdes ) have potential applications to many realistic problems such as bose einstein condensa... | the nonlinear schrdinger ( nls ) equation is considered on a periodic graph subject to the kirchhoff boundary conditions . bifurcations of standing localized waves for frequencies lying below the bottom of the linear spectrum of the associated stationary schrdinger equation are considered by using analysis of two - dim... | the nonlinear schrdinger ( nls ) equation is considered on a periodic graph subject to the kirchhoff boundary conditions . bifurcations of standing localized waves for frequencies lying below the bottom of the linear spectrum of the associated stationary schrdinger equation are considered by using analysis of two - dim... |
1105.5222 | i | the determination of the equation of state ( eos ) of asymmetric nuclear matter ( nm ) has been the main object of numerous nuclear structure and reaction studies involving unstable nuclei lying close to the neutron or proton driplines @xcite . the knowledge about the eos of asymmetric nm is vital for any model of neut... | the eos of the uniform ns core has been calculated for the np composition in the-equilibrium at zero temperature , using version sly4 of the skyrme interaction as well as two density - dependent versions of the finite - range m3y interaction ( cdm3y and m3y - p ) , and versions d1s and d1n of the gogny interaction . | the nuclear mean - field potentials obtained in the hartree - fock method with different choices of the in - medium nucleon - nucleon ( nn ) interaction have been used to study the equation of state ( eos ) of the neutron star ( ns ) matter . the eos of the uniform ns core has been calculated for the np composition in ... |
1105.5222 | i | the eos of the np@xmath0 matter of neutron star in @xmath1-equilibrium has been studied in details using the nuclear mean - field potentials obtained in the hf method with different choices of the effective ( in - medium ) nn interactions that give two different behaviors of the nm symmetry energy at supranuclear densi... | the nuclear mean - field potentials obtained in the hartree - fock method with different choices of the in - medium nucleon - nucleon ( nn ) interaction have been used to study the equation of state ( eos ) of the neutron star ( ns ) matter . although the considered effective nn interactions were proven to be quite rea... | the nuclear mean - field potentials obtained in the hartree - fock method with different choices of the in - medium nucleon - nucleon ( nn ) interaction have been used to study the equation of state ( eos ) of the neutron star ( ns ) matter . the eos of the uniform ns core has been calculated for the np composition in ... |
1005.5424 | i | to summarize , we have carried out a study of calculating overlap fermion propagators and hadron correlators on the @xmath0 flavor domain wall fermion configurations on @xmath115 , and @xmath3 lattices with both deflation in the inversion and low - mode substitution in constructing the correlators . with hyp smearin... | the overlap fermion propagator is calculated on flavor domain wall fermion gauge configurations on , and lattices . with hyp smearing and low eigenmode deflation the overhead cost for calculating eigenmodes ranges from 4.5 to 7.9 propagators for the above lattices . through the study of hyperfine splitting , we found t... | the overlap fermion propagator is calculated on flavor domain wall fermion gauge configurations on , and lattices . with hyp smearing and low eigenmode deflation , it is shown that the inversion of the overlap operator can be expedited by times for the lattice and times for the lattice . the overhead cost for calculati... |
astro-ph0703475 | c | the pan - starrs project has developed the first integrated asteroid detection , intra and inter - night linking , attribution , precovery , orbit identification and orbit determination system in the world . it is known as the moving object processing system ( mops ) . for testing and monitoring purposes during operati... | here we describe new kd - tree and variable - tree algorithms that allow fast , efficient , scalable linking of intra and inter - night detections . using a pseudo - realistic simulation of the pan - starrs survey strategy incorporating weather , astrometric accuracy and false detections successful tests of the mops on... | the panoramic survey telescope and rapid response system ( pan - starrs ) under development at the university of hawaii s institute for astronomy is creating the first fully automated end - to - end moving object processing system ( mops ) in the world . it will be capable of identifying detections of moving objects in... |
1612.00106 | i | electric vehicles ( evs ) have several advantages over the traditional gasoline powered vehicles . for example , evs are more environment friendly and more energy efficient . realizing the above , regulators ( e.g. federal energy regulator commission ( ferc ) ) are providing incentives to the consumers to switch to ele... | the paper considers a bidirectional power flow model of the electric vehicles ( evs ) in a charging station . the evs can inject energies by discharging via a vehicle - to - grid ( v2 g ) service which can enhance the profits of the charging station . however , frequent charging and discharging degrade battery life . t... | the paper considers a bidirectional power flow model of the electric vehicles ( evs ) in a charging station . the evs can inject energies by discharging via a vehicle - to - grid ( v2 g ) service which can enhance the profits of the charging station . however , frequent charging and discharging degrade battery life . a... |
1612.00106 | c | this paper proposed a menu - based pricing approach for v2 g service where the charging station selects prices to the arriving users for different charging amounts , additional amount of battery utilization , and the deadline . the user either selects one of the contracts or rejects all based on her utility function . ... | we propose a menu - based pricing scheme , where the charging station selects a price for each arriving user for the amount of battery utilization , the total energy , and the time ( deadline ) that the ev will stay . the charging station can serve users using a combination of the renewable energy and the conventional ... | the paper considers a bidirectional power flow model of the electric vehicles ( evs ) in a charging station . the evs can inject energies by discharging via a vehicle - to - grid ( v2 g ) service which can enhance the profits of the charging station . however , frequent charging and discharging degrade battery life . a... |
1208.6478 | i | contact problems of elasticity are widely used in many fields of science and engineering , especially in machine science , structural mechanics , geology and biomechanics . the brief overview of existing numerical and analytical methods for the solution of contact problems can be found in @xcite . efficient approach to... | the paper is devoted to penalty robin robin domain decomposition methods ( ddms ) , proposed by us for the solution of unilateral multibody contact problems of elasticity . these ddms are based on the penalty method for variational inequalities and some stationary and nonstationary iterative methods for nonlinear vari... | the paper is devoted to penalty robin robin domain decomposition methods ( ddms ) , proposed by us for the solution of unilateral multibody contact problems of elasticity . these ddms are based on the penalty method for variational inequalities and some stationary and nonstationary iterative methods for nonlinear vari... |
1609.02638 | i | from motion ( sfm ) is the process to find three - dimensional ( 3d ) structure and camera motion parameters from a set of 2d image sequences . the classical method for 3d reconstruction is stereo vision using two or three images @xcite . stereo vision , due to limited information , is sensitive to image noise . given ... | the paper preposes a new scheme to promote the robustness of 3d structure and motion factorization from uncalibrated image sequences . first , an augmented affine factorization algorithm is proposed to circumvent the difficulty in image registration with imperfect data . then , an alternative weighted factorization alg... | the paper preposes a new scheme to promote the robustness of 3d structure and motion factorization from uncalibrated image sequences . first , an augmented affine factorization algorithm is proposed to circumvent the difficulty in image registration with imperfect data . then , an alternative weighted factorization alg... |
cond-mat0505148 | i | lanthanide based heavy fermion ( hf ) metals constitute a major , long studied class of correlated electron materials @xcite . their behaviour is quite distinct from conventional clean metals , the basic physics being driven by strong spin - flip scattering from essentially localised @xmath3-levels , generating the la... | the paramagnetic phase of heavy fermion systems is investigated , using a non - perturbative local moment approach to the asymmetric periodic anderson model within the framework of dynamical mean field theory . transport and optics are found to exhibit scaling in terms of a single underlying low - energy coherence scal... | the paramagnetic phase of heavy fermion systems is investigated , using a non - perturbative local moment approach to the asymmetric periodic anderson model within the framework of dynamical mean field theory . the natural focus is on the strong coupling kondo - lattice regime wherein single - particle spectra , scatte... |
cond-mat0505148 | c | we have considered here the periodic anderson lattice , the canonical model for understanding heavy fermion metals , kondo insulators , intermediate valence and related materials . optical conductivities , d.c . transport and single - particle dynamics of the paramagnetic phase have been investigated , using the local ... | dynamics / transport on all relevant ()-scales are encompassed , from the low - energy behaviour characteristic of the lattice coherent fermi liquid , through incoherent effective single - impurity physics likewise found to arise in the universal scaling regime , to non - universal high - energy scales ; and which desc... | the paramagnetic phase of heavy fermion systems is investigated , using a non - perturbative local moment approach to the asymmetric periodic anderson model within the framework of dynamical mean field theory . the natural focus is on the strong coupling kondo - lattice regime wherein single - particle spectra , scatte... |
gr-qc0112002 | i | spin foam models have been proposed as candidates for a quantum theory of space - time geometry @xcite and therefore form candidates for a quantum theory of gravity . spin foam models also play a central role in the construction of invariants of piecewise - linear three- and four - manifolds @xcite . they arise as th... | the partition function of the- or-symmetric euclidean barrett crane model can be understood as a sum over all quantized geometries of a given triangulation of a four - manifold . in the original formulation , we present an exact duality transformation for the full quantum theory and reformulate the model in terms of n... | the partition function of the- or-symmetric euclidean barrett crane model can be understood as a sum over all quantized geometries of a given triangulation of a four - manifold . in the original formulation , the variables of the model are balanced representations of which describe the quantized areas of the triangles... |
1309.3957 | i | following ( * ? ? ? * example 6.3 ) , consider the reaction network in the species @xmath0 and @xmath1 with the reactions @xmath2{\,k_1\ , } 2x , & & 2y \xrightleftharpoons[k_4]{\,k_3\ , } x\end{aligned}\ ] ] let @xmath3 represent concentrations at time @xmath4 of the species @xmath5 respectively . then * mass - actio... | the idea is that if all reactions are reversible in a weak sense , then no species can go extinct . a notion that has been found useful in thinking about persistence is that of `` critical siphon . '' we explore the combinatorics of critical siphons , with a view towards the persistence conjecture . we introduce the no... | the persistence conjecture is a long - standing open problem in chemical reaction network theory . it concerns the behavior of solutions to coupled ode systems that arise from applying mass - action kinetics to a network of chemical reactions . the idea is that if all reactions are reversible in a weak sense , then no ... |
astro-ph0510335 | c | damping on cosmic rays may terminate the slow kraichnan - type cascade in the interstellar medium at @xmath261 @xmath8 . our estimates were made for the level of mhd turbulence which produces the empirical value of cosmic - ray diffusion coefficient . this finding suggests a possible explanation for the peaks in second... | we find that the dissipation of waves due to the resonant interaction with cosmic ray particles may terminate the kraichnan - type cascade below wavelengths cm . the energy - dependence of the cosmic - ray diffusion coefficient found in the resulting self - consistent model may explain the peaks in the secondary to pri... | the physical processes involved in diffusion of galactic cosmic rays in the interstellar medium are addressed . we study the possibility that the nonlinear mhd cascade sets the power - law spectrum of turbulence which scatters charged energetic particles . we find that the dissipation of waves due to the resonant inter... |
1108.2534 | i | the young stellar object ( yso ) was first noted to be an erupting source when it brightened suddenly in november 2003 , illuminating a new nebula now known as mcneil s nebula . this deeply embedded , low - mass yso is typically considered to be an ex lupi - type object ( an exor " ) though it shares some spectral cha... | the pre - main sequence star v1647 ori has recently undergone two optical / near - infrared ( oir ) outbursts that are associated with dramatic enhancements in the stellar accretion rate . our analysis of all fourteen chandra x - ray observatory observations of v1647 ori demonstrate that variations in the x - ray lumin... | the pre - main sequence star v1647 ori has recently undergone two optical / near - infrared ( oir ) outbursts that are associated with dramatic enhancements in the stellar accretion rate . our intensive x - ray monitoring of this object affords the opportunity to investigate whether and how the intense x - ray emission... |
1108.2534 | c | figure [ overall ] suggests that the overall x - ray flux of v1647 ori is strongly correlated with optical / near - infrared flux . this correlation is revealed more clearly in figure [ longtermhvsx ] , in which we plot the x - ray luminosity versus the i@xmath19-band luminosity . we interpolated i@xmath19-band luminos... | furthermore , the chandra monitoring demonstrates that the x - ray spectral properties of the second eruption were strikingly similar to those of the 2003 eruption . since the oir and x - ray changes are correlated , we hypothesize that these reconnection events either occur in the accretion stream connecting the circu... | the pre - main sequence star v1647 ori has recently undergone two optical / near - infrared ( oir ) outbursts that are associated with dramatic enhancements in the stellar accretion rate . our intensive x - ray monitoring of this object affords the opportunity to investigate whether and how the intense x - ray emission... |
1108.2534 | i | our x - ray monitoring demonstrates that the two optical / near - ir outbursts undergone by the enigmatic v1647 ori in less than a decade were accompanied by strong x - ray outbursts . during these two outbursts ( 20032005 and 2008present ) , we see that the x - ray flux rose to peak luminosity over a span of a few wee... | our intensive x - ray monitoring of this object affords the opportunity to investigate whether and how the intense x - ray emission is related to pre - ms accretion activity . we find that x - ray spectra obtained immediately following the second outburst during which v1647 ori exhibited high x - ray luminosities , hi... | the pre - main sequence star v1647 ori has recently undergone two optical / near - infrared ( oir ) outbursts that are associated with dramatic enhancements in the stellar accretion rate . our intensive x - ray monitoring of this object affords the opportunity to investigate whether and how the intense x - ray emission... |
astro-ph0005182 | i | dwarf irregular galaxies often have relatively large and bright hii regions indicative of active star formation in dense neighboring clouds . normal spiral galaxies have equally bright hii regions , but the background stellar disks in spiral galaxies are usually bright too , giving the hii regions less contrast than th... | the pressures of giant hii regions in 6 dwarf irregular galaxies are found to be a factor of larger than the average pressures of the corresponding galaxy disks , obtained from the stellar and gaseous column densities . this is unlike the situation for spiral galaxies where these two pressures are approximately equal .... | the pressures of giant hii regions in 6 dwarf irregular galaxies are found to be a factor of larger than the average pressures of the corresponding galaxy disks , obtained from the stellar and gaseous column densities . this is unlike the situation for spiral galaxies where these two pressures are approximately equal .... |
0805.3824 | i | the problem of error correction for a network implementing linear network coding has been an active research area since 2002 @xcite . the crucial motivation for the problem is the phenomenon of error propagation , which arises due to the recombination characteristic at the heart of network coding . a single corrupt pac... | is succinctly described by the rank metric ; as a consequence , it is shown that universal network error correcting codes achieving the singleton bound can be easily constructed and efficiently decoded . all of these results are based on a general approach to adversarial error correction , which could be useful for oth... | the problem of error correction in both coherent and noncoherent network coding is considered under an adversarial model . for coherent network coding , where knowledge of the network topology and network code is assumed at the source and destination nodes , the error correction capability of an ( outer ) code is succi... |
0805.3824 | c | we have addressed the problem of error correction in network coding under a worst - case adversarial model . we show that certain metrics naturally arise as the fundamental parameter describing the error correction capability of a code ; namely , the rank metric for coherent network coding , and the injection metric fo... | the problem of error correction in both coherent and noncoherent network coding is considered under an adversarial model . for coherent network coding , where knowledge of the network topology and network code is assumed at the source and destination nodes , the error correction capability of an ( outer ) code adversar... | the problem of error correction in both coherent and noncoherent network coding is considered under an adversarial model . for coherent network coding , where knowledge of the network topology and network code is assumed at the source and destination nodes , the error correction capability of an ( outer ) code is succi... |
1301.7455 | c | we considered a setting where opinions of individuals in a social network evolve through processes of social dynamics , reaching a nash equilibrium . adopting a standard social and economic model of such dynamics we addressed the following natural question : given a social network of individuals who have their own inte... | , we adopt a well - established model for social - opinion dynamics and formalize the campaign - design problem as the problem of identifying a set of target individuals whose positive opinion about an information item will maximize the overall positive opinion for the item in the social network . we study the complexi... | the process of opinion formation through synthesis and contrast of different viewpoints has been the subject of many studies in economics and social sciences . today , this process manifests itself also in online social networks and social media . the key characteristic of successful promotion campaigns is that they ta... |
hep-ph0606205 | i | the evolution of cosmic string networks is a challenging problem . the need to consider large ratios of length and time scales makes a complete numerical analysis impossible , while the nonlinearity of the process defeats a purely analytic treatment . thus a full understanding of most of the signatures of cosmic string... | we then add in loop production as a perturbation and find that it diverges at small scales . this need not invalidate the stretching model , since the loop production occurs in localized regions , but it implies a complicated fragmentation process . our ability to model this process is limited , but we argue that loop ... | the properties of string networks at scales well below the horizon are poorly understood , but they enter critically into many observables . we argue that in some regimes , stretching will be the only relevant process governing the evolution . in this case , the string two - point function is determined up to normaliza... |
0906.5576 | i | with the advent of quantum field theory our idea of vacuum has been strongly modified with respect to that of classical physics . vacuum is no more intended as a literal nothing but as a physical entity with a complex structure . within the framework of quantum electrodynamics ( qed ) , the interest in investigating th... | the quantum electrodynamical vacuum polarization effects arising in the collision of a high - energy proton beam and a strong , linearly polarized laser field are investigated . the probability that laser photons merge into one photon by interacting with the protons electromagnetic field is calculated taking into accou... | the quantum electrodynamical vacuum polarization effects arising in the collision of a high - energy proton beam and a strong , linearly polarized laser field are investigated . the probability that laser photons merge into one photon by interacting with the protons electromagnetic field is calculated taking into accou... |
nucl-ex0006012 | r | 1 and 2 show typical singles particle and @xmath3-ray spectra obtained at 125 mev bombarding energy . figs . 3 and 4 show similar spectra obtained at 135 mev beam energy . from the measured @xmath4-particle and @xmath3-ray energies and lifetimes , production cross sections for various evaporation residue nuclei , with... | the data are interpreted in terms of the production of long - lived ( t of several months ) high spin isomeric states in the second well of the potential in the parent nuclei , which decay to the normal states in the daughters , and in the third well of the potential , which decay to the second well . | the reactionsi +ta has been studied at e=125 and 135 mev . coincidences between high energy particles and various x- and-rays from abnormally long - lived states were observed . e.g. 7.8 - 8.6 mev-particles with-rays of a superdeformed band , 5.1 - 5.5 mev-particles with x- and-rays of w , re , and pt , and 3.88 mev pa... |
1203.3207 | i | the outstanding performance of the lhc experiments has led the field of high energy physics into unprecedented territory in the energy and luminosity frontier . major discoveries at the tera - scale are highly anticipated . one of the primary motivations for lhc experiments is the exploration for the mechanism of elect... | the other hand , due to the strong correlation between the higgs decays to and to predicted in the mssm , the apparent absence of a final state signal is in direct conflict with the peak . if both the excess and the absence of a signal continue , new physics beyond the mssm will be required . a similar correlation exis... | the recent results on higgs boson searches from lhc experiments provide significant guidance in exploring the minimal supersymmetric ( susy ) standard model ( mssm ) higgs sector . if we accept the existence of a sm - like higgs boson in the mass window of 123 gev gev as indicated by the observed events , there are two... |
1203.3207 | c | in light of the powerful results presented by atlas and cms for the sm higgs boson searches at the lhc , along with the data from the lep2 and tevatron , we reexamined the mssm higgs sector for their masses , couplings and other related susy parameters . instead of only presenting benchmark scenarios , we allowed varia... | the recent results on higgs boson searches from lhc experiments provide significant guidance in exploring the minimal supersymmetric ( susy ) standard model ( mssm ) higgs sector . if we accept the existence of a sm - like higgs boson in the mass window of 123 gev gev as indicated by the observed events , there are two... | the recent results on higgs boson searches from lhc experiments provide significant guidance in exploring the minimal supersymmetric ( susy ) standard model ( mssm ) higgs sector . if we accept the existence of a sm - like higgs boson in the mass window of 123 gev gev as indicated by the observed events , there are two... |
1306.2172 | i | neutral hydrogen ( hi ) interacts with @xmath0 cm photons through a spin - flip transition @xcite . observing the redshifted @xmath0 cm brightness temperature cm signal or @xmath0 cm brightness temperature we , really mean _ redshifted _ @xmath0 cm signal ] against a background of the cosmic microwave background i... | the redshifted cm brightness distribution from neutral hydrogen is a promising probe into the cosmic dark ages , cosmic dawn , and re - ionization . lofar s low band antennas ( lba ) may be used in the frequency range mhz to mhz ( ) to measure the sky averaged redshifted cm brightness temperature as a function of f... | the redshifted cm brightness distribution from neutral hydrogen is a promising probe into the cosmic dark ages , cosmic dawn , and re - ionization . lofar s low band antennas ( lba ) may be used in the frequency range mhz to mhz ( ) to measure the sky averaged redshifted cm brightness temperature as a function of f... |
1306.2172 | c | single antenna wide field of view experiments that measure the sky spectrum to high degree of accuracy are interesting probes of the cosmic dark ages , cosmic dawn , and the epoch of reionization . such measurements not only require unprecedented accuracy in receiver gain and noise temperature calibration , but also re... | these low frequencies are affected by strong galactic foreground emission that is observed through frequency dependent ionospheric and antenna beam distortions which lead to chromatic mixing of spatial structure into spectral structure . using simple models , we show that ( i ) the additional antenna temperature due to... | the redshifted cm brightness distribution from neutral hydrogen is a promising probe into the cosmic dark ages , cosmic dawn , and re - ionization . lofar s low band antennas ( lba ) may be used in the frequency range mhz to mhz ( ) to measure the sky averaged redshifted cm brightness temperature as a function of f... |
1604.06873 | i | graphene is a two - dimensional sheet of carbon atoms arranged in a hexagonal lattice , which possesses unusual mechanical , electrical and optical properties . at energies below a few ev the electronic excitations ( quasiparticles ) in graphene are well described by the dirac model , i.e. , display the linear dispersi... | the reflectivity properties of graphene with nonzero mass - gap parameter are investigated in the framework of dirac model using the polarization tensor in ( 2 + 1)-dimensional space - time . for this purpose , a more simple explicit representation for the polarization tensor along the real frequency axis we also find ... | the reflectivity properties of graphene with nonzero mass - gap parameter are investigated in the framework of dirac model using the polarization tensor in ( 2 + 1)-dimensional space - time . for this purpose , a more simple explicit representation for the polarization tensor along the real frequency axis is found . th... |
1604.06873 | c | in the foregoing , we have investigated the reflectivity properties of gapped graphene at both zero and nonzero temperature in the framework of the dirac model . it was shown that the presence of nonzero mass - gap parameter has a profound effect on the reflectivity of graphene . to find this effect , we have employed ... | we show that the nonzero mass - gap parameter has a profound effect on the reflectivity of graphene . specifically , at zero temperature the reflectivity of gapped graphene goes to zero with vanishing frequency . at nonzero temperature our analytic results are accompanied with numerical computations performed over a wi... | the reflectivity properties of graphene with nonzero mass - gap parameter are investigated in the framework of dirac model using the polarization tensor in ( 2 + 1)-dimensional space - time . for this purpose , a more simple explicit representation for the polarization tensor along the real frequency axis is found . th... |
hep-ph9711392 | i | the study of multiparticle production in hard processes provides one with an important information about both the qcd partonic branching processes and the transition from the coloured partons to the colourless hadrons . the vast amount of experimental data collected in various hard collisions processes convincingly con... | they are based upon the difference in the intensity of the soft radiation from primary and antennae . * perturbative universality in soft particle production * valery a. khoze , sergio lupia , wolfgang ochs _ infn - laboratori nazionali di frascati , p.o . | the spectrum of partons in a qcd jet becomes independent of the primary energy in the low momentum limit . this follows within the perturbative qcd from the colour coherence in soft gluon branching . remarkably , the hadrons follow such behaviour closely , suggesting the parton hadron duality picture to be appropriate ... |
0907.4388 | i | background independence and diffeomorphism invariance are key assumptions in various approaches to quantum gravity @xcite . compared to older canonical approaches @xcite , what makes loop quantum gravity @xcite technically possible and mathematically robust is a further assumption consisting in the choice of the loop a... | the state space of loop quantum gravity admits a decomposition into orthogonal subspaces associated to diffeomorphism equivalence classes of spin - network graphs . in this paper i investigate the possibility of obtaining this state space from the quantization of a topological field theory with _ degrees of freedom . i... | the state space of loop quantum gravity admits a decomposition into orthogonal subspaces associated to diffeomorphism equivalence classes of spin - network graphs . in this paper i investigate the possibility of obtaining this state space from the quantization of a topological field theory with _ many _ degrees of free... |
1008.4796 | i | according to the popular hierarchical clustering @xmath2 cold dark matter ( ) scenario , galaxies form and grow inside evolving dark matter haloes . a central question emerges then about what is the galaxy stellar mass , , associated on average with a given halo of mass , i.e. , the relation . the change with redshif... | this sequence of relations , defined in the range , together with average cold dark matter ( ) halo mass aggregation histories ( mahs ) are used here for inferring _ average _ growth histories , the galaxian hybrid evolutionary tracks ( ghets ) , where hybrid remarks the combination of observational ( ) and theoretica... | the stellar dark halo mass relation of galaxies at different redshifts , ( , ) , encloses relevant features concerning their physical processes and evolution . this sequence of relations , defined in the range , together with average cold dark matter ( ) halo mass aggregation histories ( mahs ) are used here for infer... |
1008.4796 | i | empirically inferred relations from @xmath10 to @xmath25 were connected with average halo mahs in order to infer the corresponding individual _ average _ stellar mass growth histories , called here ghets . we have adopted an ( , @xmath0 ) relationship continuous in the @xmath147 redshift range and in agreement with t... | the stellar dark halo mass relation of galaxies at different redshifts , ( , ) , encloses relevant features concerning their physical processes and evolution . the inferred average growth histories ( ghets ) of highest and lowest mass galaxies are definitively quite different from the average mahs , ( ) , of the corr... | the stellar dark halo mass relation of galaxies at different redshifts , ( , ) , encloses relevant features concerning their physical processes and evolution . this sequence of relations , defined in the range , together with average cold dark matter ( ) halo mass aggregation histories ( mahs ) are used here for infer... |
1301.0166 | i | computer simulations of macromolecular liquids described at the atomistic level are extremely useful because they bridge information between the microscopic molecular structure of the polymeric system , at the given thermodynamic conditions , and its macroscopic properties , such as viscosity , diffusion , and dynamica... | the rescaling formalism accounts for the corrections in the dynamics due to the change in entropy and the change in friction that are a consequence of the coarse - graining procedure . by including these two corrections the dynamics theoretically predicted time correlation functions show good agreement with simulations... | the theory to reconstruct the atomistic - level chain diffusion from the accelerated dynamics that is measured in mesoscale simulations of the coarse - grained system , is applied here to the dynamics of _ cis_-1,4-polybutadiene melts where each chain is described as a soft interacting colloidal particle . the rescalin... |
1501.00266 | i | one way of finding rates of reaction is to consider rates of transport in a low dimensional hamiltonian system representing the specific reaction . some of the first examples studied using transition state theory consisted of bimolecular reaction in gaseous phase , i.e. @xmath4 for two ( polyatomic ) molecules @xmath5 ... | the transition states and dividing surfaces used to find rate constants for bimolecular reactions are shown to undergo morse bifurcations , in which they change diffeomorphism class , and to exist for a large range of energies , not just immediately above the critical energy for first connection between reactants and p... | the transition states and dividing surfaces used to find rate constants for bimolecular reactions are shown to undergo morse bifurcations , in which they change diffeomorphism class , and to exist for a large range of energies , not just immediately above the critical energy for first connection between reactants and p... |
1501.00266 | c | the purpose of this article was to show that morse bifurcations must be considered when studying transport problems for larger ranges of energies , and more specifically to show the existence of morse bifurcations of capture transition states and dividing surfaces for bimolecular reactions . by considering the differen... | specifically , we consider capture between two molecules and the associated transition states for the case of non - zero angular momentum and general attitudes . morse bifurcations of transition states in bimolecular reactions + r s mackay and d c strub + mathematics institute and centre for complexity science , univer... | the transition states and dividing surfaces used to find rate constants for bimolecular reactions are shown to undergo morse bifurcations , in which they change diffeomorphism class , and to exist for a large range of energies , not just immediately above the critical energy for first connection between reactants and p... |
1112.6179 | i | in his paper @xcite , tutte took advantage of two natural operations on ( finite multi)graphs ( actually on isomorphism classes of multigraphs ) , deletion and contraction of an edge , in order to introduce the ring @xmath0 $ ] and a polynomial in two commuting variables @xmath1 , also known by whitney @xcite , uniqu... | the two operations , deletion and contraction of an edge , on multigraphs directly lead to the tutte polynomial which satisfies a universal problem . as observed by brylawski in terms of order relations , these operations may be interpreted as a particular instance of a general theory which involves universal invarian... | the two operations , deletion and contraction of an edge , on multigraphs directly lead to the tutte polynomial which satisfies a universal problem . as observed by brylawski in terms of order relations , these operations may be interpreted as a particular instance of a general theory which involves universal invarian... |
astro-ph0310592 | i | the uninterrupted 7-day _ asca _ observation of the tev blazar mrk 421 in 1998 has revealed that day - scale x ray flares seen in previous observations were probably unresolved superpositions of many smaller flares @xcite . the nearly continuous observation allowed not only the possibility to track the individual f... | the uninterrupted 7-day _ asca _ observations of the tev blazar mrk 421 in 1998 have clearly revealed that x ray flares occur repeatedly . in this paper , we present the results of the time - resolved spectral analysis of the combined data taken by _ asca _ , _ rxte _ , _ bepposax _ , and _ euve_. in this object an... | the uninterrupted 7-day _ asca _ observations of the tev blazar mrk 421 in 1998 have clearly revealed that x ray flares occur repeatedly . in this paper , we present the results of the time - resolved spectral analysis of the combined data taken by _ asca _ , _ rxte _ , _ bepposax _ , and _ euve_. in this object an... |
astro-ph0310592 | i | we have performed detailed analysis of the combined _ euve _ , _ asca _ , _ bepposa@xmath0x _ , and _ rxte _ data collected during the long look campaign of mrk 421 in 1998 , resulting in the measurement of the time - resolved spectrum in a broad energy range of 0.125 kev in segments as short as several ksec . these ... | similar results were derived for the 1997 observation , while the relation gave a smaller index when included both 1997 and 1998 data . on the other hand , we show that this relation , and also the detailed spectral variations , differ from flare to flare within the 1998 campaign . we suggest that the observed features... | the uninterrupted 7-day _ asca _ observations of the tev blazar mrk 421 in 1998 have clearly revealed that x ray flares occur repeatedly . in this paper , we present the results of the time - resolved spectral analysis of the combined data taken by _ asca _ , _ rxte _ , _ bepposax _ , and _ euve_. in this object an... |
1312.3734 | i | modern density - functional theory ( dft ) was introduced by hohenberg and kohn in a classic paper @xcite and is now the workhorse of quantum chemistry and other fields of quantum physics . subsequently , dft was put on a mathematically firm ground by lieb using convex analysis.@xcite the central quantity of dft is th... | the universal density functional of density - functional theory is a complicated and ill - behaved function of the density in particular , is not differentiable , making many formal manipulations more complicated . the moreau in particular , taking advantage of the differentiability of , a rigorous formulation of koh... | the universal density functional of density - functional theory is a complicated and ill - behaved function of the density in particular , is not differentiable , making many formal manipulations more complicated . whilst has been well characterized in terms of convex analysis as forming a conjugate pair with the grou... |
0905.4408 | i | nonlinear hyperbolic conservation laws on networks have recently attracted a lot of interest in various fields : car traffic @xcite , gas dynamics @xcite , irrigation channels @xcite and supply chains @xcite . a network is modeled by a graph : a finite collection of arcs connected together by vertices . on each arc ... | this paper deals with conservation laws on networks , represented by graphs . entropy - type conditions are considered to determine dynamics at nodes . since entropy dispersion is a local concept , we consider a network composed by a single node with incoming and outgoing arcs . we extend at the classical krukov entrop... | this paper deals with conservation laws on networks , represented by graphs . entropy - type conditions are considered to determine dynamics at nodes . since entropy dispersion is a local concept , we consider a network composed by a single node with incoming and outgoing arcs . we extend at the classical krukov entrop... |
1506.07653 | i | the dynamics of a wide class of open quantum systems , interacting with the environment , can be described in the framework of the hudson - parthasarathy quantum stochastic calculus @xcite . this approach employs quantum stochastic differential equations ( qsdes ) which are driven by a quantum mechanical analogue of th... | this paper is concerned with the coherent quantum filtering ( cqf ) problem , where a quantum observer is cascaded in a measurement - free fashion with a linear quantum plant so as to minimize a mean square error of estimating the plant variables of interest . both systems are governed by markovian hudson - parthasarat... | this paper is concerned with the coherent quantum filtering ( cqf ) problem , where a quantum observer is cascaded in a measurement - free fashion with a linear quantum plant so as to minimize a mean square error of estimating the plant variables of interest . both systems are governed by markovian hudson - parthasarat... |
1203.4724 | i | we are happy to help celebrate stein s stunning , deep and significant contribution to the statistical literature . in 1956 , charles stein ( @xcite ) proved a result that astonished many and was the catalyst for an enormous and rich literature of substantial importance in statistical theory and practice . stein showe... | some emphasis is placed on developing intuition as to why shrinkage should work in location problems whether the underlying population is normal or not . considerable attention is devoted to generalizing the `` stein lemma '' which underlies much of the theoretical development of improved minimax estimation for spheric... | this paper reviews advances in stein - type shrinkage estimation for spherically symmetric distributions . some emphasis is placed on developing intuition as to why shrinkage should work in location problems whether the underlying population is normal or not . considerable attention is devoted to generalizing the `` st... |
1211.6823 | c | lhc is expected to confirm if there is a new particle at 125 gev by the end of this year . the likelihood for a new discovery is rather high . nevertheless , whether this new particle is the sm higgs boson is not an easy question to answer . here the scenario of this 125 gev particle produced by vector - boson fusio... | , the alternative vector - boson fusion is more sensitive to electroweak symmetry breaking . using the well known dijet - tagging technique to single out the vector - boson fusion mechanism , we investigate potential of vector - boson fusion to discriminate a number of models suggested to give an enhanced inclusive dip... | this review is based on the talk presented at the susy 2012 ( beijing ) . the new particle around 125 gev observed at the large hadron collider ( lhc ) is almost consistent with the standard model higgs boson , except that the diphoton decay mode may be excessive . we summarize a number of possibilities . while at the ... |
1405.7966 | i | with detections for about 560 million objects , _ wise _ represents a major step forward in the surveying and understanding of the infrared sky . its combination of up to 1000 times higher sensitivity than previous ir surveys , and a relatively high angular resolution , enables studies of source samples with unprecede... | we develop colour and magnitude criteria that are based only on _ wise _ data to select asymptotic giant branch ( agb ) stars with circumstellar dust shells , and separate them into o - rich and c - rich classes . with these criteria we produce an all - sky map for the count ratio of the two populations . we find that ... | through matches with the sloan digital sky survey ( sdss ) catalogue we identify the location of various families of astronomical objects in _ wise _ colour space . we identify reliable indicators that separate galactic / local from extragalactic sources and concentrate here on the objects in our galaxy and its closes... |
astro-ph0001379 | i | turbulence is an important ingredient for understanding the properties and characteristics of molecular clouds and star - forming regions . turbulent gas motions are highly supersonic as indicated by the superthermal line widths ubiquitously observed throughout molecular clouds ( williams , blitz & mckee 2000 ) . these... | turbulence is essential for understanding the structure and dynamics of molecular clouds and star - forming regions . one - point probability distribution functions ( pdf s ) of dynamical variables have been suggested as appropriate statistical measures and applied to several observed molecular clouds . in addition , r... | turbulence is essential for understanding the structure and dynamics of molecular clouds and star - forming regions . there is a need for adequate tools to describe and characterize the properties of turbulent flows . one - point probability distribution functions ( pdf s ) of dynamical variables have been suggested as... |
astro-ph0001379 | i | sph simulations of driven and decaying , supersonic , turbulent flows with and without self - gravity have been analyzed in this study . it extends previous investigations of mildly supersonic , decaying , _ non_-self - gravitating turbulence ( lis et al . 1996 , 1998 ) into a regime more relevant molecular clouds , by... | of driven and decaying , supersonic , turbulent flows with and without self - gravity are presented . the pdf s of the density , of the line - of - sight velocity centroids , and of the line centroid increments are studied . this is supplemented by a discussion of the dispersion and the kurtosis of the increment pdf s ... | turbulence is essential for understanding the structure and dynamics of molecular clouds and star - forming regions . there is a need for adequate tools to describe and characterize the properties of turbulent flows . one - point probability distribution functions ( pdf s ) of dynamical variables have been suggested as... |
0909.0940 | i | particle packing problems are ancient , dating back to the dawn of civilization . bernal has remarked that `` heaps '' ( particle packings ) were the first things that were ever measured in the form of basketfuls of grain for the purpose of trading or of collection of taxes @xcite . dense packings of hard particles hav... | understanding the nature of dense particle packings is a subject of intense research in the physical , mathematical and biological sciences . the preponderance of previous work has focused on spherical particles , and very little is known about dense polyhedral packings . this novel optimization problem is solved here ... | understanding the nature of dense particle packings is a subject of intense research in the physical , mathematical and biological sciences . the preponderance of previous work has focused on spherical particles , and very little is known about dense polyhedral packings . we formulate the problem of generating dense pa... |
0909.0940 | c | we have formulated the problem of generating dense packings of nonoverlapping polyhedra within an adaptive fundamental cell subject to periodic boundary conditions as an optimization problem , which we call the adaptive shrinking cell ( asc ) scheme . the procedure allows both a sequential search of the configurational... | we formulate the problem of generating dense packings of nonoverlapping , non - tiling polyhedra within an adaptive fundamental cell subject to periodic boundary conditions as an optimization problem , which we call the adaptive shrinking cell ( asc ) scheme . in addition , we conjecture that the optimal packing of any... | understanding the nature of dense particle packings is a subject of intense research in the physical , mathematical and biological sciences . the preponderance of previous work has focused on spherical particles , and very little is known about dense polyhedral packings . we formulate the problem of generating dense pa... |
1212.6664 | c | we have characterized the properties of the middle - aged @xmath0-ray and x - ray pulsar j0357 + 3205 ( morla ) and its tail . the x - ray spectrum of the pulsar is consistent with a magnetospheric non - thermal component plus thermal emission from hot spots ; the lack of any detected thermal component from the whole s... | using a new _ xmm - newton _ observation , we have characterized the x - ray properties of the middle - aged radio - quiet-ray pulsar j0357 + 3205 ( named morla ) and its tail . the x - ray emission from the pulsar is consistent with a magnetospheric non - thermal origin plus a thermal emission from a hot spot ( or hot... | using a new _ xmm - newton _ observation , we have characterized the x - ray properties of the middle - aged radio - quiet-ray pulsar j0357 + 3205 ( named morla ) and its tail . the x - ray emission from the pulsar is consistent with a magnetospheric non - thermal origin plus a thermal emission from a hot spot ( or hot... |
astro-ph0607512 | c | from our study of 19,464 galaxies in the deep2 galaxy redshift survey , we conclude that the color density relation observed in the local universe is also seen at @xmath1 , with the fraction of red galaxies increasing with local galaxy overdensity at essentially all epochs studied @xmath136 and over all environments p... | using a sample of 19,464 galaxies drawn from the deep2 galaxy redshift survey , we study the relationship between galaxy color and environment at . the entire redshift regime studied , we find that the color density relation evolves continuously , with red galaxies more strongly favoring overdense regions at low relat... | using a sample of 19,464 galaxies drawn from the deep2 galaxy redshift survey , we study the relationship between galaxy color and environment at . we find that the fraction of galaxies on the red sequence depends strongly on local environment out to , being larger in regions of greater galaxy density . at all epochs p... |
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