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1511.04919
i
the kantian explanation for ` the unreasonable effectiveness of mathematics in the natural sciences' is that the patterns which we seek out in nature are those patterns with which we are already familiar as innate categories of perception @xcite . when we encounter a new phenomenon , perhaps we first seek to describe ...
tangle machines are a topologically inspired diagrammatic formalism to describe information flow in networks . this paper begins with an expository account of tangle machines motivated by the problem of describing ` covariance intersection ' fusion of gaussian estimators in networks . it then gives two examples in whic...
tangle machines are a topologically inspired diagrammatic formalism to describe information flow in networks . this paper begins with an expository account of tangle machines motivated by the problem of describing ` covariance intersection ' fusion of gaussian estimators in networks . it then gives two examples in whic...
1303.0993
i
einstein proposed the idea of teleparallelism , or _ fernparallelismus _ ( aka _ absolute parallelism _ , _ distant parallelism _ ) , in order to unify gravity and electromagnetism @xcite . unlike general relativity , spacetime in teleparallelism is equipped with a connection with zero curvature , but non - vanishing ...
teleparallel theories of gravity have a long history . they include a special case referred to as the _ teleparallel equivalent of general relativity _ ( tegr , aka gr ) . recently this theory has been generalized to gravity . this might hint at hitherto undiscovered problems at the theoretical level . in this work , w...
teleparallel theories of gravity have a long history . they include a special case referred to as the _ teleparallel equivalent of general relativity _ ( tegr , aka gr ) . recently this theory has been generalized to gravity . tight constraints from observations suggest that gravity is not as robust as initially hoped ...
1303.0993
m
a viable theory of gravity should satisfy certain theoretical criteria , including the lack of tachyonic modes , or modes that carry negative kinetic energy ( i.e. , ghosts ) .. ] the theory should also support a well - posed initial value problem , that is , satisfy the cauchy - kowalevski theorem @xcite . moreover a...
tight constraints from observations suggest that gravity is not as robust as initially hoped . we point out that a generic theory can be expected to have certain problems including superluminal propagating modes , the presence of which can be revealed by using the characteristic equations that govern the dynamics in gr...
teleparallel theories of gravity have a long history . they include a special case referred to as the _ teleparallel equivalent of general relativity _ ( tegr , aka gr ) . recently this theory has been generalized to gravity . tight constraints from observations suggest that gravity is not as robust as initially hoped ...
1212.4067
i
the gerda experiment ( germanium detector array @xcite ) is a search for the neutrinoless double beta ( @xmath1 ) decay of @xmath0ge . the observation of such a decay would prove that lepton number is not conserved , and that the neutrino has a majorana component @xcite . a discovery of @xmath1 decay would have sig...
the collaboration is performing a search for neutrinoless double beta decay ofge with the eponymous detector . the experiment has been installed and commissioned at the laboratori nazionali del gran sasso and has started operation in november 2011 . the design , construction and first operational results are describe...
the collaboration is performing a search for neutrinoless double beta decay ofge with the eponymous detector . the experiment has been installed and commissioned at the laboratori nazionali del gran sasso and has started operation in november 2011 . the design , construction and first operational results are describe...
cs0112012
i
traces are used to model the occurrence of events in concurrent systems @xcite . roughly speaking , a letter corresponds to an event and two letters commute when the corresponding events can occur simultaneously . in this context , the two basic performance measures associated with a trace @xmath2 are its _ length _ @x...
we use the rationality to obtain precise information on the asymptotics of the number of traces of a given height or length . then , we study the average height of a trace for various probability distributions on traces . for the uniform probability distribution on traces of the same length ( resp . of the same height ...
the _ height _ of a trace is the height of the corresponding heap of pieces in viennot s representation , or equivalently the number of factors in its cartier - foata decomposition . let and stand respectively for the height and the length of a trace . we prove that the bivariate commutative series is rational , and we...
hep-ex0408114
r
the muon fluxes , @xmath78 , conventionally multiplied by the third power of the momentum , and the charge ratios , @xmath79 , are listed for each zenith angle bin in tables [ tab : flux10]@xmath4[tab : flux03 ] with their statistical and systematic uncertainties . the statistical correlation coefficients , @xmath80 , ...
the ratio of positive to negative muons is studied between 20 and 500 , and the average vertical muon charge ratio is found to be 1.285 0.003 ( stat . ) 0.019 ( syst . ) . _ the l3+c group dedicates this publication to the late bianca monteleoni . _
the absolute muon flux between 20 and 3000 is measured with the l3 magnetic muon spectrometer for zenith angles ranging from to . due to the large exposure of about 150 msrd , and the excellent momentum resolution of the l3 muon chambers , a precision of 2.3% at 150 in the vertical direction is achieved . the rat...
cond-mat9702036
i
the interest of the last decade in dynamical and rheological properties of complex fluids has seen the introduction of several new numerical methods for carrying out computer simulations on hydrodynamic time scales , the simulation of which using molecular dynamics often results in intensive computational demands . the...
the algorithm for the dpd fluid , the dynamics of which is conceptually a combination of molecular dynamics , brownian dynamics and lattice gas automata , is designed for simulating rheological properties of complex fluids on hydrodynamic time scales . starting from the-particle fokker - planck , or kramers equation , ...
the algorithm for the dpd fluid , the dynamics of which is conceptually a combination of molecular dynamics , brownian dynamics and lattice gas automata , is designed for simulating rheological properties of complex fluids on hydrodynamic time scales . this paper calculates the equilibrium and transport properties ( vi...
1701.00591
i
the andreev reflection ( ar ) is an electron - hole conversion process taking place between a normal metal and a superconductor with the excitation energy of the incident electrons is lower than the superconducting gap energy , which was originally proposed by a. f. andreev in 1964 [ ] . this conventional andreev refle...
it is shown that for relativistic materials , due to the klein tunneling instead of impurity potentials , the local strain in the junction is the key factor that determines the transparency of the junction . are observed as the strength of the gauge field increases . the behaviors of the conductance are in well agreeme...
the andreev conductance across normal metal ( n)/superconductor ( sc ) junctions with relativistic dirac spectrum is investigated theoretically in the blonder-tinkham-klapwijk formalism . it is shown that for relativistic materials , due to the klein tunneling instead of impurity potentials , the local strain in the ju...
1112.1430
i
understanding how and when supermassive black holes ( smbhs ) grow is currently of central importance in extragalactic astronomy . a significant amount of empirical work has established correlations between smbh mass and host galaxy spheroidal properties , such as luminosity @xcite , stellar velocity dispersion ( the @...
it is one of the primary empirical tools available for mapping the growth of supermassive black holes and for constraining theoretical models of their evolution . in this review we conclude with a discussion of directions for future research which will lead to improvement in both empirical and theoretical determination...
the black hole mass function of supermassive black holes describes the evolution of the distribution of black hole mass . it is one of the primary empirical tools available for mapping the growth of supermassive black holes and for constraining theoretical models of their evolution . in this review we discuss methods f...
1007.0727
i
the chromosphere of the quiet sun is one of the most complex stellar atmospheric regions ( e.g. , harvey 2006 , 2009 ; judge 2006 , 2009 ) . lying between the thin photosphere and the extended @xmath5 k corona , it is here where the magnetic field becomes the globally dominating factor ruling the outer solar atmosphere...
the chromosphere of the quiet sun is a very important stellar atmospheric region whose thermal and magnetic structure we need to decipher for unlocking new discoveries in solar and stellar physics . to this end , we need to identify and exploit observables sensitive to weak magnetic fields ( g ) and to the presence of ...
the chromosphere of the quiet sun is a very important stellar atmospheric region whose thermal and magnetic structure we need to decipher for unlocking new discoveries in solar and stellar physics . to this end , we need to identify and exploit observables sensitive to weak magnetic fields ( g ) and to the presence of ...
1007.0727
c
we have investigated theoretically the sensitivity of the scattering polarization @xmath3 and @xmath4 profiles of the ca ii ir triplet to the presence of magnetic fields through the hanle effect . to this end , we have applied a multilevel radiative transfer code ( see appendix a ) for treating the transfer of spectral...
our study reveals that the linear polarization profiles produced by scattering in the ca ii ir triplet have thermal and magnetic sensitivities potentially of great diagnostic value . we also find that for given magnetic field configurations the sign of the and profiles of the 8542 and 8662 lines is the same in bo...
the chromosphere of the quiet sun is a very important stellar atmospheric region whose thermal and magnetic structure we need to decipher for unlocking new discoveries in solar and stellar physics . to this end , we need to identify and exploit observables sensitive to weak magnetic fields ( g ) and to the presence of ...
1011.6289
i
the experimental realization of bose - einstein condensation ( bec ) in dilute atomic gases @xcite has lead to a resurgence of interest in the theory of weakly interacting bose gases @xcite . theories of weakly - interacting bec were initially developed @xcite in the hope of obtaining insight into the physics of the...
we discuss the extension of this method to the calculation of more general correlations , including the so - called anomalous correlations of the field , without recourse to symmetry - breaking assumptions . our method is based on the introduction of-symmetric classical - field variables analogous to the modified quant...
the classical - field formalism has been widely applied in the calculation of normal correlation functions , and the characterization of condensation , in finite - temperature bose gases . here we discuss the extension of this method to the calculation of more general correlations , including the so - called anomalous ...
1011.6289
c
we have presented a methodology for the calculation of general spatial correlations of the finite - temperature bose gas , including anomalous correlations , in a classical - field approach . we introduced @xmath0-symmetric classical - field variables , analogous to number - conserving quantum ladder operators consider...
the classical - field formalism has been widely applied in the calculation of normal correlation functions , and the characterization of condensation , in finite - temperature bose gases . here we compare our results for anomalous correlation functions with the predictions of mean - field theories , and demonstrate tha...
the classical - field formalism has been widely applied in the calculation of normal correlation functions , and the characterization of condensation , in finite - temperature bose gases . here we discuss the extension of this method to the calculation of more general correlations , including the so - called anomalous ...
1305.0386
i
since the theory of nucleation phenomena was introduced a long time ago @xcite , the question under which conditions the `` conventional theory '' of nucleation is accurate has been debated ( see e.g. @xcite ) and this debate continues until today . for the simplest case of homogeneous nucleation ( by statistical fluct...
the theory considers the nucleation process as a slow ( quasi - static ) cluster ( droplet ) growth over a free energy barrier , constructed in terms of a balance of surface and bulk term of a `` critical droplet '' of radius , implying that the rates of droplet growth and shrinking essentially balance each other for d...
the conventional theory of homogeneous and heterogeneous nucleation in a supersaturated vapor is tested by monte carlo simulations of the lattice gas ( ising ) model with nearest - neighbor attractive interactions on the simple cubic lattice . the theory considers the nucleation process as a slow ( quasi - static ) clu...
1305.0386
c
in the present work , we have studied aspects of nucleation theory by simulation of clusters and their dynamics , using the ising ( lattice gas ) model on the simple cubic lattice . both homogeneous nucleation and heterogeneous nucleation at planar walls ( where a `` surface field '' acts ) have been considered . al...
the conventional theory of homogeneous and heterogeneous nucleation in a supersaturated vapor is tested by monte carlo simulations of the lattice gas ( ising ) model with nearest - neighbor attractive interactions on the simple cubic lattice . these studies of nucleation kinetics are compared to studies where the relat...
the conventional theory of homogeneous and heterogeneous nucleation in a supersaturated vapor is tested by monte carlo simulations of the lattice gas ( ising ) model with nearest - neighbor attractive interactions on the simple cubic lattice . the theory considers the nucleation process as a slow ( quasi - static ) clu...
1602.07522
i
this work is motivated by several physics goals , spanning fundamental and applied neutrino physics . reactor antineutrinos are emitted in huge quantities by reactor cores , and this feature has been used by many particle physicists since the late fifties to study the neutrino properties@xcite . in the seventies , was ...
the detailed understanding of the antineutrino emission from research reactors is mandatory for any high sensitivity experiments either for fundamental or applied neutrino physics , as well as a good control of the gamma and neutron backgrounds induced by the reactor operation . in this article , the antineutrino emiss...
the detailed understanding of the antineutrino emission from research reactors is mandatory for any high sensitivity experiments either for fundamental or applied neutrino physics , as well as a good control of the gamma and neutron backgrounds induced by the reactor operation . in this article , the antineutrino emiss...
0808.3164
i
modern x - ray observations show complex structures in both the spatial and spectral domains of various astrophysical sources . nonetheless , active galalactic nuclei ( agn ) including quasars nuclei remain spatially unresolved even with the highest - resolution x - ray telescopes . most of their energy is released wit...
the poisson nature of the photon counts leads to local random fluctuations in the observed spectrum that often results in excess emission in a narrow band of energy resembling a weak narrow line . from a formal statistical perspective , this leads to a ( sometimes highly ) multimodal likelihood . bayesian methods offer...
the detection and quantification of narrow emission lines in x - ray spectra is a challenging statistical task . the poisson nature of the photon counts leads to local random fluctuations in the observed spectrum that often results in excess emission in a narrow band of energy resembling a weak narrow line . from a for...
0808.3164
m
using a poisson model for the photon counts , the likelihood function of the parameter in the spectral model described in [ park : sec : model ] is given by @xmath35 $ ] where @xmath36 denotes the observed photon counts . with likelihood - based methods , the parameter value that maximizes the probability of the obser...
many standard statistical procedures are based on ( asymptotic ) gaussian approximations to the likelihood and simply can not be used in such settings . the new markov chain monte carlo ( mcmc ) methods developed in and , however , are able to fully explore the complex posterior distribution of the location of a narrow...
the detection and quantification of narrow emission lines in x - ray spectra is a challenging statistical task . the poisson nature of the photon counts leads to local random fluctuations in the observed spectrum that often results in excess emission in a narrow band of energy resembling a weak narrow line . from a for...
astro-ph0206133
i
uranium and thorium are regarded as potentially useful cosmochronometers because their long radioactive decay half - lives ( @xmath3th : 14.05 gyr , @xmath2u : 4.468 gyr ) are significant fractions of the expected age of the universe . all of the actinides , including uranium and thorium , are thought to be pure @xmath...
the discovery of the second highly-process - enhanced , extremely metal - poor star , cs 31082 - 001 ( [ fe / h ] ) has provided a powerful new tool for age determination , by virtue of the detection and measurement of the radioactive species uranium and thorium . one of the serious limitations of this approach , howe...
the discovery of the second highly-process - enhanced , extremely metal - poor star , cs 31082 - 001 ( [ fe / h ] ) has provided a powerful new tool for age determination , by virtue of the detection and measurement of the radioactive species uranium and thorium . because the half - life ofu is one - third that ofth ,...
astro-ph0206133
i
we have constructed a robust model of the @xmath0-process based on the neutrino - wind scenario for application to the u - th cosmochronology . the model of neutrino winds was taken from otsuki et al . ( 2000 ) and wanajo et al . ( 2001 ) , along with some improvements described above . the @xmath0-process with various...
, the age of ( the progenitor of ) cs 31082 - 001 can be regarded as the minimum age of the galaxy , and hence of the universe . is determined to be gyr , in excellent agreement with lower limits on the age of the universe estimated by other dating techniques , as well as with other stellar radioactive age estimat...
the discovery of the second highly-process - enhanced , extremely metal - poor star , cs 31082 - 001 ( [ fe / h ] ) has provided a powerful new tool for age determination , by virtue of the detection and measurement of the radioactive species uranium and thorium . because the half - life ofu is one - third that ofth ,...
astro-ph0505079
i
bars and spirals are an important part of the morphology of disk galaxies . these showy disk morphological features which characterize the ( hubble ) tuning fork " ( firmani & avila - reese 2003 ) play a role in general classification schemes ( e.g. , hubble 1926 ; sandage 1961 ; de vaucouleurs 1959 ; sandage & bedke ...
we have applied the bar / spiral separation method of buta , block , and knapen to derive the distribution of maximum relative gravitational bar torques , , for 147 spiral galaxies in the statistically well - defined ohio state university bright galaxy survey ( osubgs ) sample . our goal is to examine the properties of...
the distribution of bar strengths in disk galaxies is a fundamental property of the galaxy population that has only begun to be explored . we have applied the bar / spiral separation method of buta , block , and knapen to derive the distribution of maximum relative gravitational bar torques , , for 147 spiral galaxies ...
1210.5246
i
galaxies are complex systems consisting of a multitude of components that often require different approaches for both analytical and numerical study . the gaseous component can be described with the classic hydrodynamics equations ( che ) thanks to frequent collisions between constituent particles that act to isotropis...
the dominant constituents of the universe s matter are believed to be collisionless in nature and thus their modelling in any self - consistent simulation is extremely important . for simulations that deal only with dark matter or stellar systems , the conventional n - body technique is fast , memory efficient , and re...
the dominant constituents of the universe s matter are believed to be collisionless in nature and thus their modelling in any self - consistent simulation is extremely important . for simulations that deal only with dark matter or stellar systems , the conventional n - body technique is fast , memory efficient , and re...
1210.5246
c
in this paper we have outlined a series of important limitations that are encountered in mesh codes when using the particle - mesh technique . used to consistently integrate collisionless stellar or dark matter components into simulations which model gas physics on an eulerian mesh , the particle - mesh technique has t...
however when extending simulations to include the effects of gas physics , mesh codes are at a distinct disadvantage compared to sph codes . whereas implementing the n - body approach into sph codes is fairly trivial , the particle - mesh technique used in mesh codes to couple collisionless stars and dark matter to t...
the dominant constituents of the universe s matter are believed to be collisionless in nature and thus their modelling in any self - consistent simulation is extremely important . for simulations that deal only with dark matter or stellar systems , the conventional n - body technique is fast , memory efficient , and re...
1609.02176
i
typically , an electronic system sustains average charge and heat current densities , @xmath6 , @xmath7 , when subjected to a uniform temperature gradient , @xmath8 , and constant electric field , @xmath9 . its linear thermoelectric response is described by [ eq : linres ] ( c j^e + j^h + ) = ( cc & + & + )...
the electrical hall conductivities of any anisotropic interacting system with reflection symmetry obey . in contrast , we show that the analogous relation between the transverse thermoelectric peltier coefficients , , does not generally hold in the same system . this fact may be traced to interaction contributions to t...
the electrical hall conductivities of any anisotropic interacting system with reflection symmetry obey . in contrast , we show that the analogous relation between the transverse thermoelectric peltier coefficients , , does not generally hold in the same system . this fact may be traced to interaction contributions to t...
cond-mat0111536
i
camno@xmath0 and lamno@xmath0 are endpoint compounds in the series ca@xmath5la@xmath6mno@xmath0 , which has been thoroughly studied experimentally and theoretically @xcite . they have relatively simple atomic and magnetic structures , their magnetic excitations are well described by a spin wave hamiltonian @xcite and e...
the equilibrium structure and exchange constants of camno and lamno have been investigated using total energy unrestricted hartree - fock ( uhf ) and localised orbital configuration interaction ( ci ) calculations on the bulk compounds and mno and mno clusters . computed exchange constants depend on orbital ordering . ...
the equilibrium structure and exchange constants of camno and lamno have been investigated using total energy unrestricted hartree - fock ( uhf ) and localised orbital configuration interaction ( ci ) calculations on the bulk compounds and mno and mno clusters . the predicted structure and exchange constants for camno ...
cond-mat0111536
r
uhf total energy calculations were performed using the crystal98 code @xcite for fm , a- , c- , and g - af spin orderings . the energy of the cubic fm structure with the experimental lattice constant of 3.73 was adopted as the reference energy ( 0 mev ) ; calculations were also performed for each of the spin orderin...
a series of calculations on lamno in the cubic perovskite structure shows that a hamiltonian with independent orbital ordering and exchange terms accounts for the total energies of cubic lamno with various spin and orbital orderings . the lattice constant of the lowest energy cubic perovskite structure ( 3.953 ) is in...
the equilibrium structure and exchange constants of camno and lamno have been investigated using total energy unrestricted hartree - fock ( uhf ) and localised orbital configuration interaction ( ci ) calculations on the bulk compounds and mno and mno clusters . the predicted structure and exchange constants for camno ...
cond-mat0111536
c
uhf and ci cluster calculations for the exchange constant in camno@xmath0 are in reasonable agreement with estimates for its value based on the rushbrooke - wood formula @xcite and its nel temperature . the calculated exchange constants are larger than the estimate based on experiment . the single af exchange constant ...
the predicted structure and exchange constants for camno are in reasonable agreement with estimates based on its nel temperature . uhf calculations tend to underestimate exchange constants in lamno , but have the correct sign when compared with values obtained by neutron scattering ; exchange constants obtained from ci...
the equilibrium structure and exchange constants of camno and lamno have been investigated using total energy unrestricted hartree - fock ( uhf ) and localised orbital configuration interaction ( ci ) calculations on the bulk compounds and mno and mno clusters . the predicted structure and exchange constants for camno ...
physics0111165
i
discrete symmetry violations in atoms are important phenomena to probe for physics beyond the standard model(sm ) of the particle physics . the electric dipole moment(edm ) of an atom , which is a signature of the simultaneous parity and time - reversal ( p - t ) symmetry violations is one such . there are several poss...
the existence of a finite electric dipole moment ( edm ) of the closed - shell atom yb implies parity and time reversal violations involving the nuclear sector . an important effect which can contribute to the yb edm if a finite of yb is observed in experiments , then an estimate of can be obtained by combining with th...
the existence of a finite electric dipole moment ( edm ) of the closed - shell atom yb implies parity and time reversal violations involving the nuclear sector . an important effect which can contribute to the yb edm is the tensor - pseudotensor electron - nucleus interaction characterized by the coupling constant . wi...
astro-ph0508177
i
the last few years haven seen the establishment of the lyman-@xmath0 forest as one of the major observational tools to probe the matter power spectrum . measurements of the matter power from the lyman-@xmath0 forest data extend to smaller scales and probe a complementary redshift range than those using the cosmic mic...
is very challenging . , we investigate how the interplay between astrophysical and cosmological parameters affects their measurements using the recently published flux power spectrum obtained from 3035 sdss qsos ( mcdonald et al . 2004 ) . we argue , however , that the major uncertainties in this measurement are still ...
the flux power spectrum of the lyman- forest in quasar ( qso ) absorption spectra is sensitive to a wide range of cosmological and astrophysical parameters and instrumental effects . modelling the flux power spectrum in this large parameter space to an accuracy comparable to the statistical uncertainty of large sample...
astro-ph0508177
c
in table [ tab3 ] we list results for the most important parameters describing the matter distribution ( @xmath1 and @xmath3 ) obtained by recent studies using the lyman-@xmath0 forest by a variety of authors . the most direct comparison is again with m04b . at @xmath105 our results correspond to an fluctuation amplit...
we use here a coarse grid of hydrodynamical simulations run with to obtain a `` best guess '' model around which we calculate a finer grid of flux power spectra using a taylor expansion of the flux power spectrum to first order . in this way we find that the sdss flux power spectrum alone is able to constrain a wide ra...
the flux power spectrum of the lyman- forest in quasar ( qso ) absorption spectra is sensitive to a wide range of cosmological and astrophysical parameters and instrumental effects . modelling the flux power spectrum in this large parameter space to an accuracy comparable to the statistical uncertainty of large sample...
0811.0610
i
two - dimensional honeycomb lattice of carbon atoms may be viewed as the mother of all other forms of carbon . its crucial electronic property , which arises as a consequence of the absence of the inversion symmetry around the lattice site , is that the usual fermi surface is reduced to just two points . the electronic...
the general low - energy theory of electrons interacting via repulsive short - range interactions on graphene s honeycomb lattice at half filling is presented . the exact symmetry of the lagrangian with local quartic terms for the dirac four - component field dictated by the lattice is identified astime reversal , wher...
the general low - energy theory of electrons interacting via repulsive short - range interactions on graphene s honeycomb lattice at half filling is presented . the exact symmetry of the lagrangian with local quartic terms for the dirac four - component field dictated by the lattice is identified astime reversal , wher...
mtrl-th9602004
i
the possibility of hydrogen metallization under high pressure was first discussed by wigner and huntington in the thirties @xcite . this particular subject was included in the more general conjecture that any system becomes metallic if sufficient pressure is applied . electrons , which are bound in the isolated atomic...
the hydrogen plasma is studied in the very high density ( atomic and metallic ) regime by extensive ab initio molecular dynamics simulations . these values are typical of jovian planets interiors . finite - size and brillouin zone sampling effects in metallic systems are studied and shown to be very delicate also in th...
the hydrogen plasma is studied in the very high density ( atomic and metallic ) regime by extensive ab initio molecular dynamics simulations . protons are treated classically , and electrons in the born- oppenheimer framework , within the local density approximation ( lda ) to density functional theory . densities and ...
mtrl-th9602004
c
the main conclusions to be drawn from the present aimd simulations of the hydrogen plasma in the high - density ( @xmath154 ) regime may be summarized as follows : \a ) due to the significant spacing between the quantized electronic states in the vicinity of the fermi surface , the n - dependence of the statistical ...
a remarkably fast decrease of the melting temperature with decreasing density is found , up to a point when it becomes comparable to the fermi temperature of the protons . the simulations reveal the remarkable persistence of a weakly damped high - frequency ion acoustic mode , even under conditions of strong electron s...
the hydrogen plasma is studied in the very high density ( atomic and metallic ) regime by extensive ab initio molecular dynamics simulations . protons are treated classically , and electrons in the born- oppenheimer framework , within the local density approximation ( lda ) to density functional theory . densities and ...
1601.00656
i
we are living exciting times in cosmology . roughly 15 years after the discovery of the inconsistency of a @xmath15 universe with the magnitude - redshift observed relation for the type ia supernova @xcite , many cosmological probes have pointed towards the universe passing through a phase of accelerated expansion : th...
the impending javalambre physics of the accelerating universe astrophysical survey ( j - pas ) will be the first wide - field survey of 8500 deg to reach the ` stage iv ' category . because of the redshift resolution afforded by 54 narrow - band filters , j - pas is particularly suitable for cluster detection in the ra...
the impending javalambre physics of the accelerating universe astrophysical survey ( j - pas ) will be the first wide - field survey of 8500 deg to reach the ` stage iv ' category . because of the redshift resolution afforded by 54 narrow - band filters , j - pas is particularly suitable for cluster detection in the ra...
1601.00656
c
in this work , we have first characterized the photometric redshift properties of the j - pas survey in terms of photometric redshift bias , photometric redshift dispersion and rate of catastrophic outliers using an n - body and semi - analytical simulations @xcite and a posterior modification with ` photreal ` ( @xcit...
here we evaluate the cluster selection function for j - pas using n - body+semi - analytical realistic mock catalogues . , j - pas will arrive up to with a . therefore j - pas will provide the largest sample of clusters and groups up to with a mass calibration accuracy comparable to x - ray data . [ firstpage ]
the impending javalambre physics of the accelerating universe astrophysical survey ( j - pas ) will be the first wide - field survey of 8500 deg to reach the ` stage iv ' category . because of the redshift resolution afforded by 54 narrow - band filters , j - pas is particularly suitable for cluster detection in the ra...
cs0111053
i
the information contained by an individual finite object ( like a finite binary string ) is objectively measured by its kolmogorov complexity the length of the shortest binary program that computes the object . such a shortest program contains no redundancy : every bit is information ; but is it meaningful information...
the information in an individual finite object ( like a binary string ) is commonly measured by its kolmogorov complexity . one can divide that information into two parts : the information accounting for the useful regularity present in the object and the information accounting for the remaining accidental information ...
the information in an individual finite object ( like a binary string ) is commonly measured by its kolmogorov complexity . one can divide that information into two parts : the information accounting for the useful regularity present in the object and the information accounting for the remaining accidental information ...
1601.04652
i
branching brownian motions ( bbm ) and branching random walks ( brw ) are among the simplest stochastic models of a growing population in space and time . they describe particles which perform brownian motions or random walks and branch independently at random times @xcite . if one starts with a single particle , the s...
the large deviation function has been known for a long time in the literature for the displacement of the rightmost particle in a branching random walk ( brw ) , or in a branching brownian motion ( bbm ) . more recently a number of generalizations of the bbm and of the brw have been considered where selection or coales...
the large deviation function has been known for a long time in the literature for the displacement of the rightmost particle in a branching random walk ( brw ) , or in a branching brownian motion ( bbm ) . more recently a number of generalizations of the bbm and of the brw have been considered where selection or coales...
1601.04652
c
in the present paper we have tried to estimate the large deviation function for the position of the rightmost particle of three generalizations of the branching brownian motion and of the branching random walks , subjected to selection or coalescence mechanisms . we have proved the existence of a large deviation functi...
we try to estimate the large deviation function of the position of the rightmost particle for several such generalizations : the-bbm , the-bbm , and the cbrw ( coalescing branching random walk ) which is closely related to the noisy fkpp equation . our approach allows us to obtain only upper bounds on these large devia...
the large deviation function has been known for a long time in the literature for the displacement of the rightmost particle in a branching random walk ( brw ) , or in a branching brownian motion ( bbm ) . more recently a number of generalizations of the bbm and of the brw have been considered where selection or coales...
1205.2692
i
there are many motivations to introduce an extended higgs sector . examples are , including obsolete ones , fine - tuning in the weak - scale higgs mass @xcite suggesting supersymmetry @xcite , @xmath0-violation @xcite , grand unification @xcite , extended gauge symmetry @xcite , strong @xmath0 problem @xcite , string ...
the large hadron collider is shown to have great scope for a light charged higgs discovery , in the context of the-violating type - i two higgs doublet model . this scenario with similar masses of and was suggested by the puzzling departure from charged current lepton universality found in the lep data . with the light...
the large hadron collider is shown to have great scope for a light charged higgs discovery , in the context of the-violating type - i two higgs doublet model . this scenario with similar masses of and was suggested by the puzzling departure from charged current lepton universality found in the lep data . with the light...
1603.06248
i
the mammalian hippocampus plays a key role in spatial cognition . place cells , the principal hippocampal neurons , manifest remarkable spatial specificity of spiking activity . they fire only in select locations in the environment . these locations are known as their respective place fields @xcite . as a result , the ...
the mammalian hippocampus plays a principal role in producing a cognitive map of space an internalized representation of the animal s environment . the neuronal mechanisms we demonstrate that gamma - modulation of neuronal activity generates a synchronized spiking of dynamical cell assemblies , which enables learning ...
the mammalian hippocampus plays a principal role in producing a cognitive map of space an internalized representation of the animal s environment . the neuronal mechanisms producing this map depend primarily on the temporal structure of the hippocampal neurons spiking activity , which is modulated by the oscillatory e...
1203.4470
i
mass measurements of 40 nuclides were made , most of which improved the precision and accuracy over literature values . results are largely consistent with previous results from penning traps , reaction energetics , and storage ring measurements , but are frequently much lower in mass than results from @xmath3-endpoint...
the measurements , of fission fragments from acf spontaneous fission source in a helium gas catcher , approach the predicted path of the astrophysical process . where overlap exists , this data set is largely consistent with previous measurements from penning traps , storage rings , and reaction energetics , but large ...
the masses of 40 neutron - rich nuclides from z = 51 to 64 were measured at an average precision of using the canadian penning trap mass spectrometer at argonne national laboratory . the measurements , of fission fragments from acf spontaneous fission source in a helium gas catcher , approach the predicted path of th...
1509.01653
i
millimeter wave ( mmwave ) communications is a key candidate technology for future 5 g cellular networks . this is mainly due to the availability of large spectrum resources at higher frequencies , which leads to much higher data rates . recent research suggests that mmwave systems will typically feature ( i ) large - ...
the millimeter wave ( mmwave ) band , which is a prime candidate for 5 g cellular networks , seems attractive for wireless energy harvesting . this is because it will feature large antenna arrays as well as extremely dense base station ( bs ) deployments . optimizing the antenna geometry parameters such as beamwidth ca...
the millimeter wave ( mmwave ) band , which is a prime candidate for 5 g cellular networks , seems attractive for wireless energy harvesting . this is because it will feature large antenna arrays as well as extremely dense base station ( bs ) deployments . the viability of mmwave for energy harvesting though is unclear...
1509.01653
c
in this paper , we analyzed the energy harvesting performance at low - power devices powered by a mmwave cellular network . using a stochastic geometry framework , we derived analytical expressions characterizing the performance of mmwave energy and information transfer in terms of system , channel and network paramete...
numerical results reveal several network and device level design insights . at the bss , , the performance can be substantially improved by optimally splitting the received signal for energy and information extraction , and by deploying multi - antenna arrays . for the latter , an efficient low - power multi - antenna ...
the millimeter wave ( mmwave ) band , which is a prime candidate for 5 g cellular networks , seems attractive for wireless energy harvesting . this is because it will feature large antenna arrays as well as extremely dense base station ( bs ) deployments . the viability of mmwave for energy harvesting though is unclear...
0904.2079
r
figure 1 shows our 1.3-mm continuum map of l1551 irs5 at an angular resolution of @xmath9 . the continuum emission peaks at the location of the protostellar system , as seen in images at comparable angular resolution at 3 mm @xcite and 0.8 mm @xcite . we fitted a two - dimensional gaussian to the continuum source t...
the multiple protostellar system l1551 irs5 exhibits a large - scale bipolar molecular outflow that spans.5 pc on both the ne ( redshifted ) and sw ( blueshifted ) sides of the system . our co(21 ) image at ( au ) resolution reveals three distinct components : 1 ) an x - shaped structure spanning from center with ...
the multiple protostellar system l1551 irs5 exhibits a large - scale bipolar molecular outflow that spans.5 pc on both the ne ( redshifted ) and sw ( blueshifted ) sides of the system . we have studied this outflow within au of its driving source(s ) with the submillimeter array . our co(21 ) image at ( au ) resol...
0904.2079
i
l1551 irs5 exhibits the first recognized bipolar molecular outflow from a protostellar system . single - dish maps show that this outflow can be traced in both co(10 ) and co(21 ) to 1.4 pc on the sky along the ne ( redshifted lobe ) and sw ( blueshifted lobe ) sides of the system along a position angle of @xmath0@xm...
the compact central component likely comprises material within this cavity newly entrained by one or both outflows from the two main protostellar components . the s - shaped component mostly likely comprises a precessing outflow with its symmetry axis inclined in the opposite sense to the plane of the sky than the othe...
the multiple protostellar system l1551 irs5 exhibits a large - scale bipolar molecular outflow that spans.5 pc on both the ne ( redshifted ) and sw ( blueshifted ) sides of the system . we have studied this outflow within au of its driving source(s ) with the submillimeter array . our co(21 ) image at ( au ) resol...
1212.1201
i
near - infrared ( nir ) observations ( 0.92.5@xmath0 ) are important in practically all areas of astronomy and astrophysics . for example , low - mass stars and brown dwarfs emit a substantial fraction of their light at these wavelengths and nir spectroscopy is the most efficient way to study these objects . nir spectr...
however , deep near - infrared observations are extremely difficult to make from ground - based telescopes due to the bright background from the atmosphere . nearly all of this background comes from the bright and narrow emission lines of atmospheric hydroxyl ( oh ) molecules . the atmospheric background can not be eas...
the near - infrared is an important part of the spectrum in astronomy , especially in cosmology because the light from objects in the early universe is redshifted to these wavelengths . however , deep near - infrared observations are extremely difficult to make from ground - based telescopes due to the bright backgroun...
1212.1201
c
in this paper , we have given a thorough description of each subsystem of gnosis , the first instrument to use fiber bragg grating oh suppression fibers . these fibers were designed to demonstrate a reduction of the interline background increasing sensitivity by a factor of 40 or more when suppressing the brightest oh ...
the near - infrared is an important part of the spectrum in astronomy , especially in cosmology because the light from objects in the early universe is redshifted to these wavelengths . oh suppression fibers " consisting of fiber bragg gratings and photonic lanterns to suppress the 103 brightest atmospheric emission do...
the near - infrared is an important part of the spectrum in astronomy , especially in cosmology because the light from objects in the early universe is redshifted to these wavelengths . however , deep near - infrared observations are extremely difficult to make from ground - based telescopes due to the bright backgroun...
1306.4142
i
the fractional occupation numbers @xmath0 of the correlated one - body reduced density matrix ( 1rdm ) have intrigued many scientists in the past decades . they are defined by the eigenvalue equation @xmath1 where the 1rdm itself is defined in terms of the usual creation and annihilation field operators as @xmath2 for ...
the non - vanishing of the natural orbital occupation numbers of the one - particle density matrix of many - body systems has important consequences for the existence of a density matrix - potential mapping for nonlocal potentials in reduced density matrix functional theory and for the validity of the extended koopmans...
the non - vanishing of the natural orbital occupation numbers of the one - particle density matrix of many - body systems has important consequences for the existence of a density matrix - potential mapping for nonlocal potentials in reduced density matrix functional theory and for the validity of the extended koopmans...
astro-ph9910548
r
in creating a composite model , we first scaled the contributions from highion to provide a rough fit to the high ionization lines such as c iv @xmath41550 , [ ne v ] @xmath43426 , and [ fe vii ] @xmath46087 and lowion to fit lines such as [ n ii ] @xmath46584 , [ o ii ] @xmath43727 , with the result that the cont...
the spectra were taken with the _ hubble space telescope_/space telescope imaging spectrograph ( _ hst_/stis ) , through the 01x520 slit , covering the full stis 1200 to 10000 waveband , and are from a region that includes the hot spot , extending 02 , or 14 pc ( for h 75 km sec mpc ) , in the cross - dispersion di...
the physical conditions near the optical continuum peak ( `` hot spot '' ) in the inner narrow line region ( nlr ) of the seyfert 2 galaxy , ngc 1068 , are examined using ultraviolet and optical spectra and photoionization models . the spectra were taken with the _ hubble space telescope_/space telescope imaging spectr...
astro-ph9910548
c
as we have demonstrated , the ionic states indicated by the coronal emission - lines can co - exist in a large column of highly ionized gas . the ionization parameter , u @xmath2 1.7 , is characteristic of the x - ray absorbers present in many seyfert 1 galaxies ( cf . reynolds 1997 ) . it is tempting to associate the ...
there is an apparent correlation between ionization energy and velocity of the emission lines with respect to the systemic velocity of the host galaxy , with the coronal lines blueshifted , most other high excitation lines near systemic , and some of the low ionization lines redshifted . from the results of our modelin...
the physical conditions near the optical continuum peak ( `` hot spot '' ) in the inner narrow line region ( nlr ) of the seyfert 2 galaxy , ngc 1068 , are examined using ultraviolet and optical spectra and photoionization models . the spectra were taken with the _ hubble space telescope_/space telescope imaging spectr...
1201.4804
i
the precision measurement of the mass of the @xmath0-boson , @xmath4 , is an important goal of the fermilab tevatron @xcite and the cern large hadron collider ( lhc ) . with precise knowledge of @xmath4 and the top quark mass , @xmath5 , indirect information on the mass of the higgs boson , @xmath6 , within the standa...
the precision measurement of the mass of the boson is an important goal of the fermilab tevatron and the cern large hadron collider ( lhc ) . we provide numerical results for total cross sections and kinematic distributions of relevance to the mass measurement at the tevatron and the lhc for the processes .
the precision measurement of the mass of the boson is an important goal of the fermilab tevatron and the cern large hadron collider ( lhc ) . it requires accurate theoretical calculations which incorporate both higher - order qcd and electroweak corrections , and also provide an interface to parton - shower monte carlo...
1201.4804
c
in this paper we described the combination of the complete ew @xmath1 corrections with nlo qcd+resummed corrections to @xmath0 production in hadronic collisions , based on implementing the ew corrections of wgrad2 in powheg - w . using the resulting mc program , powheg - w_ew , which is publicly available on the webpag...
it requires accurate theoretical calculations which incorporate both higher - order qcd and electroweak corrections , and also provide an interface to parton - shower monte carlo programs which make it possible to realistically simulate experimental data . in this paper , we present a combination of the full electrowea...
the precision measurement of the mass of the boson is an important goal of the fermilab tevatron and the cern large hadron collider ( lhc ) . it requires accurate theoretical calculations which incorporate both higher - order qcd and electroweak corrections , and also provide an interface to parton - shower monte carlo...
1503.08101
i
while many features of black hole spacetimes can be investigated in terms of the motion of ( massive and massless ) particles , wave propagation opens a perspective on additional phenomena such as interference effects , scattering of radiation at a black hole , its quasi - normal modes and black hole evaporation . scat...
the propagation of ( massless ) scalar , electromagnetic and gravitational waves on fixed schwarzschild background spacetime is described by the general time - dependent regge - wheeler equation . we collect properties of all the singular points and construct analytic ( local ) solutions in terms of the standard conflu...
the propagation of ( massless ) scalar , electromagnetic and gravitational waves on fixed schwarzschild background spacetime is described by the general time - dependent regge - wheeler equation . we transform this wave equation to usual schwarzschild , eddington - finkelstein , painlev - gullstrand and kruskal - szeke...
0712.2823
c
we have modelled the pre - maximum spectra of 6 different sne ia ( see table [ tab : prop ] ) . three of these ( 2002bo , 2002dj and 2002er ) are classified as high velocity gradient ( hvg ) , and are characterized by a large si line velocity that evolves rapidly after maximum brightness . the other three sne ( 2001el ...
earlier than 1 week before maximum , sne with a rapidly evolving line velocity ( hvg ) have a larger photospheric velocity than sne with a slowly evolving line velocity ( lvg ) . since the two groups have comparable luminosities , the temperature at the photosphere is higher in lvg sne . different fe - group abundances...
the properties of the highest velocity ejecta of normal type ia supernovae ( sne ia ) are studied via models of very early optical spectra of 6 sne . at epochs earlier than 1 week before maximum , sne with a rapidly evolving line velocity ( hvg ) have a larger photospheric velocity than sne with a slowly evolving line ...
0712.2823
c
the outermost ejecta of type ia sne are studied by modeling very early spectra . of the 6 sne we studied , 2 ( sne 2002bo and 2002dj ) are classified as hvg , being characterized by a high photospheric velocity and a low photospheric temperature . all three lvg sne ( sne 2001el , 2003cg and 2003du ) have uniform proper...
the properties of the highest velocity ejecta of normal type ia supernovae ( sne ia ) are studied via models of very early optical spectra of 6 sne . at epochs this explains the different overall spectral appearance of hvg and lvg sne . however , the variation of the and absorptions at the highest velocities ( km s ) ...
the properties of the highest velocity ejecta of normal type ia supernovae ( sne ia ) are studied via models of very early optical spectra of 6 sne . at epochs earlier than 1 week before maximum , sne with a rapidly evolving line velocity ( hvg ) have a larger photospheric velocity than sne with a slowly evolving line ...
1507.00478
i
two major challenges of contemporary particle physics are the search for beyond - standard model physics and a better understanding of the non - perturbative low - energy sector of the strong interaction . typically both aspects intermix when it comes to high - precision determinations of low - energy quantities and th...
the parameters are constrained by the operator product expansion at leading order where two or all three momenta are considered as large . demanding in addition the brodsky lepage limit one obtains ( in the chiral limit ) a pion - vector - vector ( ) correlator with only one free parameter . the singly virtual pion tr...
the pseudoscalar - vector - vector ( ) correlator is constructed using two meson multiplets in the vector and two in the pseudoscalar channel . the parameters are constrained by the operator product expansion at leading order where two or all three momenta are considered as large . demanding in addition the brodsky le...
astro-ph0001266
i
rrrrrrr & & & & + & & & & & & + 104 & 0.05 & 0.06 & -0.71 & -0.70 & -0.78 & 14.05 @xmath12 0.05 + 288 & 0.03 & 0.04 & -1.40 & -1.07 & -1.14 & 15.40 @xmath12 0.05 + 362 & 0.05 & 0.06 & -1.33 & -1.15 & -1.09 & 15.51 @xmath12 0.05 + 1261 & 0.01 & 0.01 & -1.32 & & -1.08 & 16.68 @xmath12 0.05 + 1851 & 0.02 & 0.03 & -1.23 &...
the purpose of this study is to carry out a thorough investigation of the changes in morphology of the red giant branch ( rgb ) of galactic globular clusters ( ggc ) as a function of metallicity , in the bands . to this aim , ) _ we measure a complete set of metallicity indices _ , based on the morphology and position...
the purpose of this study is to carry out a thorough investigation of the changes in morphology of the red giant branch ( rgb ) of galactic globular clusters ( ggc ) as a function of metallicity , in the bands . to this aim , two key points are developed in the course of the analysis . * ( a ) * using our photometri...
astro-ph0001266
c
in this work , we have provided the first calibration of a few metallicity indices in the @xmath137 plane , namely the indices @xmath1 , @xmath2 and @xmath3 . calibrations on both the zinn & west ( 1984 ) and carretta & gratton ( 1997 ) scales have been obtained . the metallicity indices @xmath5 , @xmath6 , @xmath7 and...
( a ) * using our photometric database for galactic globular clusters ( the largest homogeneous data sample to date ; rosenberg et al . we show that our indices are internally consistent , and we calibrate each index in terms of metallicity , both on the zinn & west ( 1984 ) and the carretta & gratton ( 1997 ) scales ....
the purpose of this study is to carry out a thorough investigation of the changes in morphology of the red giant branch ( rgb ) of galactic globular clusters ( ggc ) as a function of metallicity , in the bands . to this aim , two key points are developed in the course of the analysis . * ( a ) * using our photometri...
1008.3788
i
randomized load balancing , where a job is assigned to a server from a small subset of randomly chosen servers , is very simple to implement , and can surprisingly deliver better performance ( for example reducing collisions , waiting times , backlogs ) in a number of applications , such as , data center , hash tables ...
the randomized load balancing model ( also called _ supermarket model _ ) is now being applied to the study of load balancing in data centers and multi - core servers systems . it is very interesting to analyze the general service times in the supermarket model , and specifically understand influence of the heavy - tai...
the randomized load balancing model ( also called _ supermarket model _ ) is now being applied to the study of load balancing in data centers and multi - core servers systems . it is very interesting to analyze the general service times in the supermarket model , and specifically understand influence of the heavy - tai...
1008.3788
c
in this section , we provide a necessary discussion for the key parameter @xmath8 in the doubly exponential solution of theorem [ the : cfs ] . based on this , for the fixed point we give a new and important observation : the doubly exponential solution to the fixed point can extensively exist for @xmath127 , even if t...
, we indicate two important observations : the fixed point for the supermarket model is different from the tail of stationary queue length distribution for the ordinary m / g/1 queue , and the doubly exponential solution to the fixed point can extensively exist even if the service time distribution is heavy - tailed .
the randomized load balancing model ( also called _ supermarket model _ ) is now being applied to the study of load balancing in data centers and multi - core servers systems . it is very interesting to analyze the general service times in the supermarket model , and specifically understand influence of the heavy - tai...
1008.3788
c
in this paper , we provide a novel and simple approach to study the randomized load balancing model with general service times , which is described as an infinite - size system of integral - differential equations . this approach is based on the supplementary variable method , which is always applied in dealing with st...
this approach is based on the supplementary variable method used in analyzing stochastic models extensively . we organize an infinite - size system of integral - differential equations by means of the density dependent jump markov process , and obtain a close - form solution : doubly exponential structure , for the fix...
the randomized load balancing model ( also called _ supermarket model _ ) is now being applied to the study of load balancing in data centers and multi - core servers systems . it is very interesting to analyze the general service times in the supermarket model , and specifically understand influence of the heavy - tai...
0712.2140
c
we have studied the passage from a local conformal quantum field theory defined on the halfspace @xmath4 of two - dimensional minkowski spacetime ( boundary cft , bcft ) to an associated local conformal quantum field defined on the full minkowski spacetime ( 2d cft ) . there are essentially two ways : the first is to c...
dipartimento di matematica , + universit di roma `` tor vergata '' , via della ricerca scientifica 1 , 00133 roma , italy + institut fr theoretische physik , universitt gttingen , + friedrich - hund - platz 1 , d-37077 gttingen , germany _ dedicated to klaus fredenhagen on the occasion of his 60th birthday _
the relation between two - dimensional conformal quantum field theories with and without a timelike boundary is explored . dipartimento di matematica , + universit di roma `` tor vergata '' , via della ricerca scientifica 1 , 00133 roma , italy + institut fr theoretische physik , universitt gttingen , + friedrich -...
cond-mat0306278
i
the correlation - driven transition from a paramagnetic metal to a paramagnetic insulator ( mott - hubbard transition @xcite ) is one of the most interesting problems in condensed - matter physics . as a prime example for a quantum - phase transition , the mott - hubbard transition is important from the physical point ...
the self - energy - functional approach proposed recently is applied to the single - band hubbard model at half - filling to study the mott - hubbard metal - insulator transition within the most simple but non - trivial approximation . this leads to a mean - field approach which is interesting conceptually : trial self...
the self - energy - functional approach proposed recently is applied to the single - band hubbard model at half - filling to study the mott - hubbard metal - insulator transition within the most simple but non - trivial approximation . this leads to a mean - field approach which is interesting conceptually : trial self...
astro-ph0010643
r
in table 1 we show the ionization potentials and the ionization fractions @xmath19(x@xmath20 ) is the ratio of the radially integrated number density of ion x@xmath20 to the radially integrated total number density of the element x in all ionization stages , i.e. @xmath21 , the relative column density of the ion x@xmat...
we calculate photoionization equilibrium models for region 1 , and constrain the ionization parameter by the observed(al iii)/(si ii ) column density ratio . under these conditions . in particular we can not exclude the same primary n origin in both dlas and metal - poor galaxies . no depletion of heavy elements on dus...
the similarity between observed velocity structures of al iii and singly ionized species in damped ly systems ( dlas ) suggests the presence of ionized gas in the regions where most metal absorption lines are formed . a simplified model consisting of _ region 1 ) _ a plane - parallel ionization bounded region illuminat...
astro-ph0010643
c
the above analysis shows the importance of consideration of the ionization effects in the dlas element abundance studies which was pointed out earlier by prochaska & wolfe ( 1999 ) , howk & sembach ( 1999 ) and izotov & thuan ( 1999 ) . however , at variance with many previous studies assuming that the heavy element ab...
the similarity between observed velocity structures of al iii and singly ionized species in damped ly systems ( dlas ) suggests the presence of ionized gas in the regions where most metal absorption lines are formed . a simplified model consisting of _ region 1 ) _ a plane - parallel ionization bounded region illuminat...
the similarity between observed velocity structures of al iii and singly ionized species in damped ly systems ( dlas ) suggests the presence of ionized gas in the regions where most metal absorption lines are formed . a simplified model consisting of _ region 1 ) _ a plane - parallel ionization bounded region illuminat...
astro-ph0511283
c
the cbi observations of ldn 1622 resulted in the first cm - wave continuum image of a dark cloud , at frequencies where traditional emission from dust is not expected . the cbi data follow a tight correlation with the far - ir emission , confirming that the 31 ghz emission is nonetheless related to dust . under vi...
ldn 1622 is conspicuous in the 31 ghz image we obtained with the cosmic background imager , which is the first cm - wave resolved image of a dark cloud . the mid - ir cm - wave correlation in ldn 1622 is evidence for very small grain ( vsg ) or continuum emission at 2636 ghz from a hot molecular phase . in dark cl...
the spectral energy distribution of the dark cloud ldn 1622 , as measured by finkbeiner using _ wmap _ data , drops above 30 ghz and is suggestive of a boltzmann cutoff in grain rotation frequencies , characteristic of spinning dust emission . ldn 1622 is conspicuous in the 31 ghz image we obtained with the cosm...
gr-qc0406038
i
stellar mass compact binaries consisting of double neutron stars ( ns ) , double black holes ( bh ) or a mixed binary consisting of a neutron star and a black hole , are the primary targets for a direct first detection of gravitational waves ( gw ) by interferometric detectors , ligo @xcite , virgo @xcite , geo600 @xci...
( i.e. larger overlaps with the exact signal ) , and _ faithfulness _ ( i.e. smaller biases while measuring the parameters of the signal ) with the exact ( numerical ) waveforms . the p - approximants achieve effectualness of for all spins up to the bias in the estimation of parameters is much lower in the case of p - ...
the standard post - newtonian approximation to gravitational waveforms , called t - approximants , from non - spinning black hole binaries are known not to be sufficiently accurate close to the last stable orbit of the system . a new approximation , called p - approximants , is believed to improve the accuracy of the w...
1110.0911
i
the notion of transmitting data over powerlines has posed an interesting challenge for information and coding theory . the noise characteristics of such a communication channel include permanent narrowband noise , impulse noise and white gaussian noise . communication over this channel also has an additional requiremen...
various types of codes such as permutation codes , frequency permutation arrays , and constant composition codes have been proposed over the years . in this work we study a type of code called the bounded symbol weight codes which was first introduced by versfeld in 2005 , and a related family of codes that we term co...
the study of codes for powerline communications has garnered much interest over the past decade . various types of codes such as permutation codes , frequency permutation arrays , and constant composition codes have been proposed over the years . in this work we study a type of code called the bounded symbol weight cod...
1605.07017
i
quasi - two - dimensional organic charge transfer salts of bis - ethylenedithio - tetrathiafulvalene molecules , abbreviated bedt - ttf or et , have attracted much interest due to their rich phase diagrams @xcite . among these materials , the family of @xmath0-(et)@xmath3 salts , where @xmath0 refers to a specific arr...
we investigate the evolution of the superconducting pairing symmetry within this model and point out a phase - transition between extended and symmetry . our calculations show that many-type materials lie close to the phase transition line between the two pairing symmetry types found in our calculation , possibly expla...
the symmetry of the superconducting order parameter in quasi - two - dimensional bedt - ttf organic superconductors is a subject of ongoing debate . we report _ ab initio _ density functional theory calculations for a number of organic superconductors containing-type layers . using projective wannier functions we deriv...
1605.07017
m
we use _ ab initio _ density functional theory ( dft ) calculations within an all - electron full - potential local orbital ( fplo)@xcite basis to calculate the electronic bandstructure . for the exchange - correlation functional we employ the generalized gradient approximation ( gga)@xcite . all calculations are conve...
we report _ ab initio _ density functional theory calculations for a number of organic superconductors containing-type layers . using projective wannier functions we derive parameters of a common low - energy hamiltonian based on individual bedt - ttf molecular orbitals . in a random phase approximation spin - fluctuat...
the symmetry of the superconducting order parameter in quasi - two - dimensional bedt - ttf organic superconductors is a subject of ongoing debate . we report _ ab initio _ density functional theory calculations for a number of organic superconductors containing-type layers . using projective wannier functions we deriv...
astro-ph9905274
i
neutron stars in mass - transferring binaries accrete hydrogen and helium rich material from their companions at rates ranging from @xmath9@xmath10 . this matter undergoes thermonuclear fusion within hours to days of reaching the neutron star surface , releasing @xmath11 per nucleon for solar abundances . the nuclear b...
the temperature and nuclear composition of the crust and ocean of an accreting neutron star depend on the mix of material ( the ashes ) that is produced at lower densities by fusion of the accreting hydrogen and helium . the hydrogen / helium burning is thermally stable at high accretion rates , a situation encountered...
the temperature and nuclear composition of the crust and ocean of an accreting neutron star depend on the mix of material ( the ashes ) that is produced at lower densities by fusion of the accreting hydrogen and helium . the hydrogen / helium burning is thermally stable at high accretion rates , a situation encountered...
astro-ph9905274
c
we have fully explored the complicated nucleosynthesis from thermally stable mixed hydrogen / helium burning at high accretion rates on accreting neutron stars . our major finding is that the rp process produces a mixture of very heavy elements , the average mass of which depends on the local accretion rate . the impor...
a crustal lattice as impure as implied by our results will have the conductivity throughout most of its mass set by impurity scattering , allowing for more rapid ohmic diffusion of magnetic fields than previously estimated for mono - nuclear mixes . * to appear in the astrophysical journal *
the temperature and nuclear composition of the crust and ocean of an accreting neutron star depend on the mix of material ( the ashes ) that is produced at lower densities by fusion of the accreting hydrogen and helium . the hydrogen / helium burning is thermally stable at high accretion rates , a situation encountered...
1608.01678
i
a small fraction of red giant stars have lithium abundances ( @xmath3(li ) ) exceeding the predictions of standard evolution models even though the majority of red giants ( rgs ) exhibit @xmath3(li ) orders of magnitude below standard model predictions @xcite . the low @xmath3(li ) demonstrates that non - convective ...
the temperature distribution of field li - rich red giants suggests the presence of a population of li - rich red clump ( rc ) stars . one proposed explanation for this population is that all stars with masses near 2 experience a short - lived phase of li - richness at the onset of core he - burning . many of these ...
the temperature distribution of field li - rich red giants suggests the presence of a population of li - rich red clump ( rc ) stars . one proposed explanation for this population is that all stars with masses near 2 experience a short - lived phase of li - richness at the onset of core he - burning . many of these ...
1608.01678
c
in figure [ fig : li_histo ] , we show the distribution of @xmath3(li)@xmath207 for the four clusters in this study , with histograms for both the full observed sample and the subset of rc candidate stars . the non - rc stars tend to fall at either extremes of the distributions , but are more commonly at the high extr...
we find six li - rich stars ((li).50 dex ) of which only two may be rc stars . none of the rc stars have li exceeding the levels observed in the rgb stars , but given the brevity of the suggested li - rich phase and the modest sample size , it is probable that stars with larger li - enrichments were missed simply by c...
the temperature distribution of field li - rich red giants suggests the presence of a population of li - rich red clump ( rc ) stars . one proposed explanation for this population is that all stars with masses near 2 experience a short - lived phase of li - richness at the onset of core he - burning . many of these ...
cond-mat9710330
i
the effects of the coulomb interaction of electrons in metals can only be described approximately @xcite . with the progress in producing artificial low dimensional structures the theoretical work on _ one - dimensional _ interacting fermions has gained importance @xcite . special features of the spectrum of low energy...
this fermion - boson transmutation allows to describe interacting fermions as a system of coupled oscillators . tomonaga s model of interacting nonrelativistic fermions on a ring is presented and first discussed in low order perturbation theory . after introducing the concept of two independent species of right and lef...
the theoretical description of interacting fermions in one spatial dimension is simplified by the fact that the low energy spectrum of noninteracting fermions is identical to the one for a harmonic chain . this fermion - boson transmutation allows to describe interacting fermions as a system of coupled oscillators . to...
1310.0841
i
the goal of these lectures is to discuss the theory of relativistic real fluids under the excuse of its application to the description of relativistic heavy ion collisions @xcite . more concretely , our goal is to discuss , in the simplest possible terms , why the `` einstein elevator '' concept is not useful in the de...
the theory of real relativistic fluids is in the rather unique situation that there is a natural relativistic extension of the nonrelativistic theory , but it is physically untenable . on the other hand , mounting evidence that matter created in relativistic heavy ion collisions behaves as a relativistic fluid with sma...
the theory of real relativistic fluids is in the rather unique situation that there is a natural relativistic extension of the nonrelativistic theory , but it is physically untenable . on the other hand , mounting evidence that matter created in relativistic heavy ion collisions behaves as a relativistic fluid with sma...
hep-ph9908320
i
recently the magnetic catalysis of dynamical chiral symmetry breaking has been established as a universal phenomenon in 2 + 1 and 3 + 1 dimensions : a constant magnetic field leads to the generation of a fermion dynamical mass even at the weakest attractive interaction between fermions @xcite . the essence of this effe...
an approximation for the schwinger - dyson equations describing reliably this phenomenon is established , _ i.e. _ , it is shown that there exists a consistent truncation of those equations in this problem . epsf.sty * keywords : * quantum electrodynamics , chiral symmetry , magnetic field .
the theory of the magnetic catalysis of chiral symmetry breaking in qed is developed . an approximation for the schwinger - dyson equations describing reliably this phenomenon is established , _ i.e. _ , it is shown that there exists a consistent truncation of those equations in this problem . the equations are solved ...
cond-mat0107007
m
the goal of the unitary correlation operator method ( ucom ) is to describe short - range interaction - induced correlations by a unitary transformation of an uncorrelated many - body state with @xmath4 particles . the unitary operator @xmath5 associated with this transformation can be written as an exponential of a he...
the unitary correlation operator method ( ucom ) is employed to treat short - range correlations in both , homogeneous liquid and small droplets of bosoniche atoms . the dominating short - range correlations in these systems are described by an unitary transformation in the two - body relative coordinate , applied eith...
the unitary correlation operator method ( ucom ) is employed to treat short - range correlations in both , homogeneous liquid and small droplets of bosoniche atoms . the dominating short - range correlations in these systems are described by an unitary transformation in the two - body relative coordinate , applied eith...
astro-ph0002490
i
we have used the vla radio telescope to image a contiguous @xmath36 area to a ( mean ) limiting ( @xmath1 ) sensitivity of @xmath200 mjy . from a total of 62 detections , the results of optical and near - infrared photometry are reported for 43 sources . our optical photometry is more sensitive than previous optical fo...
this optical follow - up is much deeper than that of existing larger area radio surveys of similar radio sensitivity . , we optically identified 26 radio sources with probabilities , nine are uncertain / ambiguous detections , and eight are empty fields . comparisons with a stellar synthesis model that includes radio e...
the very large array ( vla ) has been used in c - configuration to map an area at 1.4 ghz with sensitivities of 0.305 , 0.325 , 0.380 and 0.450 mjy beam over four equal subareas . radio properties are presented for 62 detected sources . deep optical imaging to gunn mag using the hale 5-m telescope covering is reported ...
1503.02963
c
this survey for gcs in the lg has identified 5 new gcs in the halo of m31 ( see table 1 ) . their properties do not appear to be exceptional , and their discovery suggests that the census of gcs in m31 may be still incomplete . the searches of the sdss galaxy catalogue for gcs described here and in papers i & ii have y...
even though this search covers only one - third of the sky and some gcs could have been missed , it suggests that the lg does not contain a large population of igcs more luminous than . in the direction of the m81 group , the search yielded five candidate gcs , probable members of that group
the whole sloan digital sky survey ( sdss , ) has been searched for intergalactic globular clusters ( igcs ) in the local group ( lg ) . using optical , infrared , and ultraviolet photometric selection criteria and photometric redshifts , the of objects in the sdss galaxy catalogue were reduced to only 183,791 brighter...
cond-mat0212321
c
taking a one - dimensional @xmath1-function bose gas as a typical example of integrable systems , we have derived the @xmath0-particle partition function . a method in this paper , referred to as the direct method , is an exact analysis of the partition function only based on the periodic boundary condition . using the...
the-particle partition function of a one - dimensional-function bose gas is calculated explicitly using only the periodic boundary condition ( the bethe ansatz equation ) . the-particles cluster integrals are shown to be the same as those by the thermal bethe ansatz method . + + keywords : thermal bethe ansatz method...
the-particle partition function of a one - dimensional-function bose gas is calculated explicitly using only the periodic boundary condition ( the bethe ansatz equation ) . the-particles cluster integrals are shown to be the same as those by the thermal bethe ansatz method . + + keywords : thermal bethe ansatz method...
cond-mat0701020
i
kagome antiferromagnets are among the most extreme examples of frustrated spin systems realized with nearest - neighbor interactions . both the frustration in each triangular unit and the rather loose `` corner - sharing '' aggregation of these units into the kagome lattice suppress the tendency to magnetically order ....
there is growing evidence from both experiment and numerical studies that low half - odd integer quantum spins on a kagome lattice with predominant antiferromagnetic near neighbor interactions do not order magnetically or break lattice symmetries even at temperatures much lower than the exchange interaction strength . ...
there is growing evidence from both experiment and numerical studies that low half - odd integer quantum spins on a kagome lattice with predominant antiferromagnetic near neighbor interactions do not order magnetically or break lattice symmetries even at temperatures much lower than the exchange interaction strength . ...
1111.6595
i
it is well - known that late - type stars show magnetic activity similar to the activity of our sun , but the physics of ` stellar ' activity is not yet well understood . in addition , the activity level manifested by late - type stars is much higher than that observed for the sun . fr cnc (= bd+16 1753 = mcc 527 = ...
we present the study of fr cnc , a young , active and spotted star . polarimetric observations indicate the probable presence of a supplementary source of polarization . [ firstpage ] stars : activity stars : flare stars : rotation stars : individual : fr cnc .
this is a part of a multiwavelength study aimed at use of complementary photometric , polarimetric and spectroscopic data to achieve an understanding of the activity process in late - type stars . here we present the study of fr cnc , a young , active and spotted star . we performed analysis of ( the all sky automa...
1111.6595
i
we have carried out a photometric , polarimetric and spectroscopic study of fr cnc . optical @xmath28-band photometry was carried out during 2007 march 2008 february at terskol branch of the astronomy institute ( russia ) . there are no peculiar features in the 2008 light curve , while in the 2007 photometry two brig...
the photometry at terskol observatory shows two brightening episodes , one of which occurred at the same phase as the flare of 2006 november 23 . calculated galactic space - velocity components ( ) indicate that fr cnc belongs to the young disc population and might also belong to the ic 2391 moving group . based on l...
this is a part of a multiwavelength study aimed at use of complementary photometric , polarimetric and spectroscopic data to achieve an understanding of the activity process in late - type stars . here we present the study of fr cnc , a young , active and spotted star . we performed analysis of ( the all sky automa...
1609.02174
i
cooperative control of multi - robot / agent systems ( mrs / mas ) has generated wide interest for researchers in control and robotics communities . compared with a single robot , multiple robots can cooperatively accomplish complicated tasks with the advantages of high efficiency and robustness to the link failures . ...
this paper considers the distributed sampled - data control problem of a group of mobile robots connected via distance - induced proximity networks . a dwell time is assumed in order to avoid chattering in the neighbor relations that may be caused by abrupt changes of positions when updating information from neighbors ...
this paper considers the distributed sampled - data control problem of a group of mobile robots connected via distance - induced proximity networks . a dwell time is assumed in order to avoid chattering in the neighbor relations that may be caused by abrupt changes of positions when updating information from neighbors ...
1609.02174
c
in this paper , we proposed a sampled - data distributed control law for a group of nonholonomic unicycle robots , and established sufficient conditions for synchronization for the leaderless case without relying on dynamical properties of the neighbor graphs . in order to steer the system to a desired state , we then ...
a sufficient condition is provided to guarantee synchronization for the system without leaders . in order to steer all robots to move with the desired orientation and speed , we then introduce a number of leaders into the system , and quantitatively establish the proportion of leaders needed to track either constant or...
this paper considers the distributed sampled - data control problem of a group of mobile robots connected via distance - induced proximity networks . a dwell time is assumed in order to avoid chattering in the neighbor relations that may be caused by abrupt changes of positions when updating information from neighbors ...
1301.6901
i
this paper focuses on subnormality for toeplitz operators with matrix - valued symbols and more precisely , the case of toeplitz operators with matrix - valued bounded type symbols . in this paper we give an appropriate generalization of abrahamse s theorem to the case of matrix - valued symbols and apply this generali...
this paper deals with subnormality of toeplitz operators with matrix - valued symbols and , in particular , with an appropriate reformulation of halmos s problem 5 : which subnormal toeplitz operators with matrix - valued symbols are either normal or analytic ? in 1976 , m. abrahamse showed that if is such that or is o...
this paper deals with subnormality of toeplitz operators with matrix - valued symbols and , in particular , with an appropriate reformulation of halmos s problem 5 : which subnormal toeplitz operators with matrix - valued symbols are either normal or analytic ? in 1976 , m. abrahamse showed that if is such that or is o...
1210.5837
i
this paper develops and analyzes interior penalty discontinuous galerkin ( ipdg ) methods for the following time harmonic maxwell problem : @xmath4 where @xmath5 is a bounded domain with lipschitz continuous boundary @xmath6 and of diameter @xmath7 . @xmath8 denotes the unit outward normal to @xmath9 , @xmath10 , the i...
this paper develops and analyzes an interior penalty discontinuous galerkin ( ipdg ) method using piecewise linear polynomials for the indefinite time harmonic maxwell equations with the impedance boundary condition in the three dimensional space . for the differential problem , we prove that the sesquilinear form asso...
this paper develops and analyzes an interior penalty discontinuous galerkin ( ipdg ) method using piecewise linear polynomials for the indefinite time harmonic maxwell equations with the impedance boundary condition in the three dimensional space . the main novelties of the proposed ipdg method include the following : ...
1210.5837
m
to formulate our ipdg methods , we first need to introduce some notation . let @xmath126 be a family of partitions ( into tetrahedrons and/or parallelepipeds ) of the domain @xmath49 parameterized by @xmath21 . for any element " @xmath127 , we define @xmath128 . similarly , for each face @xmath129 of @xmath127 , defin...
the main novelties of the proposed ipdg method include the following : first , the method penalizes not only the jumps of the tangential component of the electric field across the element faces but also the jumps of the tangential component of its vorticity field ; second , the penalty parameters are taken as complex n...
this paper develops and analyzes an interior penalty discontinuous galerkin ( ipdg ) method using piecewise linear polynomials for the indefinite time harmonic maxwell equations with the impedance boundary condition in the three dimensional space . the main novelties of the proposed ipdg method include the following : ...
1112.5850
i
an arbitrage operation involves buying some good or asset for a lower price than that for which it can be sold , taking advantage of any imbalance in the quoted prices . the `` law of one price '' is a statement of a key implication of the absence of arbitrage opportunities . in turn arbitrage is often the process invo...
this paper investigates arbitrage chains involving four currencies and four foreign exchange trader - arbitrageurs . the goal of this article is to understand some interesting features of sequences of arbitrage operations , features which might well be relevant in other contexts in finance and economics . limits to ...
this paper investigates arbitrage chains involving four currencies and four foreign exchange trader - arbitrageurs . in contrast with the three - currency case , we find that arbitrage operations when four currencies are present may appear periodic in nature , and not involve smooth convergence to a `` balanced '' ense...
0911.1413
i
there have been many papers written recently on noncommutative versions of soliton equations , such as the kp equation , the kdv equation , the hirota - miwa equation and the two - dimensional toda lattice equation @xcite . it has been shown that noncommutative integrable systems often have solutions expressed in terms...
remarkably , the formulae for the iteration of darboux transformations are identical with those in the standard case of a regular derivation and are expressed in terms of quasideterminants . as an example , we revisit the darboux transformations for the manin - radul super kdv equation , studied in q.p . finally , we o...
this paper is concerned with a generalized type of darboux transformations defined in terms of a twisted derivation satisfying where is a homomorphism . such twisted derivations include regular derivations , difference and-difference operators and superderivatives as special cases . remarkably , the formulae for the it...
0911.1413
c
in this paper , we have considered a twisted derivation which includes normal derivative , forward difference operator , q - difference operator and superderivatives as special cases . we showed that a darboux transformation defined in terms of such a twisted derivation has an iteration formula written in terms of a qu...
this paper is concerned with a generalized type of darboux transformations defined in terms of a twisted derivation satisfying where is a homomorphism . such twisted derivations include regular derivations , difference and-difference operators and superderivatives as special cases . the new approach we take enables us ...
this paper is concerned with a generalized type of darboux transformations defined in terms of a twisted derivation satisfying where is a homomorphism . such twisted derivations include regular derivations , difference and-difference operators and superderivatives as special cases . remarkably , the formulae for the it...
0801.4372
i
we have studied the long - term evolution of the magnetic field and the densities of neutrons and charged particles ( protons and electrons in the interior of a neutron star , using a multi - fluid model with a simplified geometry in which the magnetic field points in one cartesian direction and varies along an orthogo...
this approximation leads to three nonlinear partial - differential equations describing the evolution of the magnetic field , as well as the movement of two fluids : the charged particles ( protons and electrons ) and the neutrons . we study the evolution of the system in three different ways : ( i ) estimating timesca...
this paper is the first in a series that aims to understand the long - term evolution of neutron star magnetic fields . we model the stellar matter as an electrically neutral and lightly - ionized plasma composed of three moving particle species : neutrons , protons , and electrons ; these species can be converted into...
1103.1913
c
in this paper we present spectral analysis and emission line images from deep _ chandra _ observation of ngc 4151 , aiming to resolve and characterise the x - ray emission in the nlr . the findings are summarized as follows : * the soft x - ray emission line images of ngc 4151 ( ovii , oviii , and neix ) are clearly...
this paper is the third in a series in which we present deep chandra acis - s imaging spectroscopy of the seyfert 1 galaxy ngc 4151 , devoted to study its complex circum - nuclear x - ray emission . emission features in the soft x - ray spectrum of the bright extended emission ( erg s ) at pc ( 2 ) are consistent with ...
this paper is the third in a series in which we present deep chandra acis - s imaging spectroscopy of the seyfert 1 galaxy ngc 4151 , devoted to study its complex circum - nuclear x - ray emission . emission features in the soft x - ray spectrum of the bright extended emission ( erg s ) at pc ( 2 ) are consistent with ...
0910.3699
i
the behavior of ultracold superfluid fermi gases continues to attract attention from the experimental and theoretical communities . through a feshbach resonance @xcite which tunes the strength of the attractive interaction , these trapped gases can exhibit a crossover from bcs to bose einstein condensation ( bec ) . un...
this paper presents a comparison of two finite - temperature bcs - bose einstein condensation ( bec ) crossover theories above the transition temperature : nozieres schmitt - rink ( nsr ) theory and finite-extended bcs - leggett theory . both theories include pair fluctuations and exhibit pseudogap effects , although t...
this paper presents a comparison of two finite - temperature bcs - bose einstein condensation ( bec ) crossover theories above the transition temperature : nozieres schmitt - rink ( nsr ) theory and finite-extended bcs - leggett theory . the comparison is cast in the form of numerical studies of the behavior of the fer...
0910.3699
c
the goal of this paper is to communicate that bcs - bec crossover theories are very exciting . they are currently being clarified and developed hand in hand with experiment . for the fermi superfluids , unlike their bose counterparts , we have no ready - made theory . in this paper we confine our attention to the norma...
the comparison is cast in the form of numerical studies of the behavior of the fermionic spectral function both theoretically and as constrained by ( primarily ) radio frequency ( rf ) experiments . on the basis of momentum - integrated radio frequency studies of unpolarized gases , it would be difficult to distinguish...
this paper presents a comparison of two finite - temperature bcs - bose einstein condensation ( bec ) crossover theories above the transition temperature : nozieres schmitt - rink ( nsr ) theory and finite-extended bcs - leggett theory . the comparison is cast in the form of numerical studies of the behavior of the fer...
1403.7720
i
storage is a new paradigm of storing data . it allows users to access data anywhere and anytime . companies such as google and apple are providing this service through their data centers , which are network - connected . such an architecture is called the distributed storage system ( dss ) . storage nodes in a dss are ...
this paper presents a flexible irregular model for heterogeneous cloud storage systems and investigates how the cost of repairing failed nodes can be minimized . the fractional repetition code , originally designed for minimizing repair bandwidth for homogeneous storage systems , is generalized to the irregular fractio...
this paper presents a flexible irregular model for heterogeneous cloud storage systems and investigates how the cost of repairing failed nodes can be minimized . the fractional repetition code , originally designed for minimizing repair bandwidth for homogeneous storage systems , is generalized to the irregular fractio...
1003.4438
c
we have calculated specific contributions to jet pseudorapidity and transverse momentum distributions for the standard model higgs plus high-@xmath1 jet production cross section at the lhc and the tevatron . the remaining scale uncertainty of the nlo qcd prediction ( in the large top - mass limit ) for this higgs produ...
this paper presents predictions for jet pseudorapidity ( ) and transverse momentum ( ) distributions for the production of the standard model higgs boson in association with a high- hadronic jet . we discuss the contributions of electroweak loops and of bottom - quark parton processes to the cross section . predictions...
this paper presents predictions for jet pseudorapidity ( ) and transverse momentum ( ) distributions for the production of the standard model higgs boson in association with a high- hadronic jet . we discuss the contributions of electroweak loops and of bottom - quark parton processes to the cross section . the latter ...
1110.3870
i
first observation of co cameron and @xmath4 uv doublet emissions in the martian dayglow were made by the mariner 6 and 7 flybys in 19691970 @xcite . these observations provided an opportunity to study the martian upper atmosphere in a greater detail . the co cameron band ( @xmath5 ; 180 260 nm ) system arises due to ...
this study is aimed at making a calculation about the impact of the two most commonly used solar euv flux models solar2000 ( s2k ) of and euvac model of on photoelectron fluxes , volume emission rates , ion densities and co cameron and co uv doublet band dayglow emissions on mars in three solar activity conditions : ...
this study is aimed at making a calculation about the impact of the two most commonly used solar euv flux models solar2000 ( s2k ) of and euvac model of on photoelectron fluxes , volume emission rates , ion densities and co cameron and co uv doublet band dayglow emissions on mars in three solar activity conditions : ...
1110.3870
r
we run the model for low solar activity condition ( similar to viking landing ) , and calculated results are compared with those of @xcite by taking the similar model atmosphere . model atmosphere is based on density data derived from viking 1 @xcite . the sun - mars distance d@xmath40 = 1.64 au and solar zenith angle ...
irrespective of the solar activity condition , production of cameron band due to photodissociative excitation of co is around 50% higher when s2k model is used . limb intensities of co cameron and co uv doublet bands are on an average a factor of and.5 , respectively , higher than the spicam mars express observation , ...
this study is aimed at making a calculation about the impact of the two most commonly used solar euv flux models solar2000 ( s2k ) of and euvac model of on photoelectron fluxes , volume emission rates , ion densities and co cameron and co uv doublet band dayglow emissions on mars in three solar activity conditions : ...