article stringlengths 0 10k | abstract stringlengths 21 108k |
|---|---|
for fixed integers @xmath0 and @xmath1 , we consider the admissible sequences of @xmath2 lattice paths in a colored @xmath3 square given in @xcite . each admissible sequence of paths can be associated with a partition @xmath10 of @xmath4 . in section
[ paths ] , we show that the number of self - conjugate admissible ... | for @xmath0 and @xmath1 , we consider certain admissible sequences of @xmath2 lattice paths in a colored @xmath3 square .
we show that the number of such admissible sequences of lattice paths is given by the sum of squares of the number of standard young tableaux of partitions of @xmath4 with height @xmath5 , which i... |
a magnitude limited complete census of variable stars in nearby dwarf galaxies allows important contributions to the star formation history of these systems . measurements of some variable stars can supply improved distance determinations for the host galaxies , others will provide important constraints for the populat... | dwarf galaxies in the local group provide a unique astrophysical laboratory . despite their proximity some of these systems still lack a reliable distance determination as well as studies of their stellar content and star formation history .
we present first results of our survey of variable stars in a sample of six ... |
there are reasons to believe that cosmic rays ( crs ) around the ankle at @xmath0 gev are dominated by extragalactic protons @xcite .
scattering processes in the cosmic microwave background ( cmb ) limit the propagation of ultra high energy ( uhe ) charged particles in our universe .
a continuation of a power - li... | the origin and chemical composition of ultra high energy cosmic rays is still an open question in astroparticle physics .
the observed large - scale isotropy and also direct composition measurements can be interpreted as an extragalactic proton dominance above the _ ankle _ at about @xmath0 gev .
photopion producti... |
in solid - core photonic crystal fibers ( pcf ) the air - silica microstructured cladding ( see fig . [ fig1 ] ) gives rise to a variety of novel phenomena @xcite including large - mode area ( lma ) endlessly - single mode operation @xcite .
though pcfs typically have optical properties very different from that of ... | we report on an easy - to - evaluate expression for the prediction of the bend - loss for a large mode area photonic crystal fiber ( pcf ) with a triangular air - hole lattice .
the expression is based on a recently proposed formulation of the v - parameter for a pcf and contains no free parameters .
the validity o... |
in @xcite a database containing a solution of the 3d incompressible navier - stokes ( ns ) equations is presented .
the equations were solved numerically with a standard pseudo - spectral simulation in a periodic domain , using a real space grid of @xmath0 grid points .
a large - scale body force drives a turbulent... | the jhu turbulence database @xcite can be used with a state of the art visualisation tool @xcite to generate high quality link : anc / dfdsubmissionquarterres.mpg[fluid dynamics videos ] . in this work
we investigate the classical idea that smaller structures in turbulent flows , while engaged in their own internal d... |
in recent years electron transfer ( et ) between molecular adsorbates and semiconductor nanomaterials and surfaces has been subject of much research @xcite .
the injection of an electron into the conduction band is a prototype reaction for a lot of electrochemical and photoelectrochemical interfacial processes such a... | electron injection from an adsorbed molecule to the substrate ( heterogeneous electron transfer ) is studied .
one reaction coordinate is used to model this process .
the surface phonons and/or the electron - hole pairs together with the internal degrees of freedom of the adsorbed molecule as well as possibly a liq... |
the open connectome project ( located at http://openconnecto.me ) aims to annotate all the features in a 3d volume of neural em data , connect these features , and compute a high resolution wiring diagram of the brain , known as a connectome .
it is hoped that such work will help elucidate the structure and function ... | * _ abstract _ : * in this paper , we present a new pipeline which automatically identifies and annotates axoplasmic reticula , which are small subcellular structures present only in axons .
we run our algorithm on the kasthuri11 dataset , which was color corrected using gradient - domain techniques to adjust contras... |
nuclei in interaction with external fields display a wide variety of collective vibrations known as giant resonances , associated with various degrees of freedom and multipolarities .
the giant isovector dipole resonance and the giant isoscalar quadrupole resonance are the most studied examples in this class of pheno... | we investigate the possible signature of the presence of giant pairing states at excitation energy of about 10 mev via two - particle transfer reactions induced by neutron - rich weakly - bound projectiles . performing particle - particle rpa calculations on @xmath0pb and bcs+rpa calculations on @xmath1sn
, we obtain... |
the schwinger - dyson ( sd ) equation is one of the most popular approaches to investigate the non - perturbative features of quantum field theory .
the analyses by making use of the sd equation for quark propagator are well - known .
recently , the coupled sd equations for the gluon and ghost propagators in yang -... | we derive the schwinger - dyson equations for the @xmath0 yang - mills theory in the maximal abelian gauge and solve them in the infrared asymptotic region .
we find that the infrared asymptotic solutions for the gluon and ghost propagators are consistent with the hypothesis of abelian dominance . |
it is common accepted that braking of pulsars is caused by the magneto - dipole radiation of the rotating magnetic star . in this case
the rate of losses of the neutron star rotation energy can be equated to the power of its magneto - dipole radiation : @xmath1 + where _ i _ is the moment of inertia of the neutron st... | we used the magneto - dipole radiation mechanism for the braking of radio pulsars to calculate the new values of magnetic inductions at the surfaces of neutron stars . for this aim
we estimated the angles @xmath0 between the rotation axis and the magnetic moment of the neutron star for 376 radio pulsars using three d... |
one of the most promising solutions to the hierarchy problem is the randall - sundrum ( rs ) model @xcite . in this model
there is a single extra dimension compactified on @xmath1 with the non - factorizable metric of @xmath2 @xmath3 here @xmath4 is the extra - dimensional coordinate , and @xmath5 is the inverse of t... | we study the corrections to higgs physics in a model of a single warped extra dimension with all fields except the higgs in the bulk , and a gauge symmetry extended to @xmath0 .
we find that generically the higgs coupling to electroweak gauge boson pairs is suppressed , the coupling to gluons is enhanced , and the co... |
the proper - motion observations of pulsars show that the pulsars had the kick velocity in the formation stage .
the young pulsars have proper velocity of @xmath4 @xcite .
the physical mechanism of such kick velocity may be due to the harrison
tademaru mechanism @xcite , anisotropic emission of neutrinos , anis... | in the population synthesis simulations of pop iii stars , many bh ( black hole)-bh binaries with merger time less than the age of the universe @xmath0 are formed , while ns ( neutron star)-bh binaries are not .
the reason is that pop iii stars have no metal so that no mass loss is expected .
then , in the final su... |
i am grateful to alekos kechris for informing me of t.dyck/ ; the proof given seems to be due to alain louveau .
i thank norm levenberg for references .
hough , j.b .
, krishnapur , m. , peres , y. , and virg , b. , _ zeros of gaussian analytic functions and determinantal point processes_. university lecture seri... | we describe the fundamental constructions and properties of determinantal probability measures and point processes , giving streamlined proofs .
we illustrate these with some important examples . we pose several general questions and conjectures .
primary 60k99 , 60g55 ; secondary 42c30 , 37a15 , 37a35 , 37a50 , 68... |
the study of the high - redshift progenitors of today s massive galaxies can provide us with invaluable insights into the key mechanisms that shape the evolution of galaxies in the high - mass regime .
the latest generation of galaxy formation models are now able to explain the number densities and ages of massive ga... | we have used high - resolution , hst wfc3/ir , near - infrared imaging to conduct a detailed bulge - disk decomposition of the morphologies of @xmath0 of the most massive ( @xmath1 ) galaxies at @xmath2 in the candels - uds field .
we find that , while such massive galaxies at low redshift are generally bulge - domin... |
natural hamiltonian systems are the mathematical models of those physical systems for which the energy is constant , for example harmonic oscillators or the kepler system .
often , as in the previous two examples , more quantities are constants of the motion ( or _ first integrals _ ) : angular momentum , laplace - r... | given an n - dimensional natural hamiltonian l on a riemannian or pseudo - riemannian manifold , we call `` extension '' of l the n+1 dimensional hamiltonian @xmath0 with new canonically conjugated coordinates @xmath1 . for suitable l ,
the functions @xmath2 and @xmath3 can be chosen depending on any natural number m... |
the effect of temperature and angular momentum on pairing properties is an interesting subject in the study of nuclear structure . because of its simplicity
, the bcs theory is often used , which offers a good description of pairing correlation in the macroscopic systems such as metallic superconductors .
it predic... | an approach is proposed to nuclear pairing at finite temperature and angular momentum , which includes the effects of the quasiparticle - number fluctuation and dynamic coupling to pair vibrations within the self - consistent quasiparticle random - phase approximation .
the numerical calculations of pairing gaps , to... |
* the anomalous x - ray pulsars ( axps ) * are a group of x - ray pulsars whose spin periods fall in a narrow range ( @xmath0 s ) , whose x - ray spectra are very soft , and which show no evidence that they accrete from a binary companion ( see mereghetti 1999 for a recent review ) . these objects may be isolated neutr... | we report on our search for the optical counterparts of the southern hemisphere anomalous x - ray pulsar 1e1048.1 - 5937 and the radio - quiet neutron stars in supernova remnants puppis a , rcw 103 , and pks 1209 - 52 .
the observations were carried out with the new mit / cfa magic camera on the magellan - i 6.5 m te... |
End of preview. Expand in Data Studio
- Downloads last month
- 44