corpus_id stringlengths 3 9 | arxiv_id stringlengths 9 16 | date stringdate 1989-10-26 00:00:00 2024-09-30 00:00:00 | title stringlengths 4 240 | abstract stringlengths 3 3.15k | categories listlengths 1 10 | topics listlengths 0 15 ⌀ | roles listlengths 1 4 | key_references listlengths 0 10 ⌀ | authors listlengths 1 5.28k ⌀ | citation_trajectory listlengths 14 26 ⌀ |
|---|---|---|---|---|---|---|---|---|---|---|
15602757 | cond-mat/9803183 | 1998-03-14 | THE SHELL MAP: The structure of froths through a dynamical map | The shell map is a very simple representation of the structure of foams, combining the geometrical (random tiling) and dynamical (loss of information from an arbitrary cell out) aspects of disorder. The structure is built from the central cell outward like an ever expanding jigsaw puzzle without boundary. The radial ma... | [
"cond-mat.dis-nn"
] | null | [
"target.author.publication_history"
] | [
{
"corpus_id": "16626312",
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}
] | [
{
"author_id": "t aste_1",
"name": "Tomaso Aste",
"publication_history": null,
"h_index": null,
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}
] | null |
6777734 | astro-ph/9803176 | 1998-03-16 | The implications of radio-quiet neutron stars | We collate the evidence for rotation-powered neutron stars that are visible as X-ray sources and not as radio pulsars. Quantitative upper limits exist for the radio fluxes of eight objects, revealing a population at least an order of magnitude less luminous at radio wavelengths than known radio pulsars of similar power... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14104968 | gr-qc/9803061 | 1998-03-17 | Quantum Properties of Topological Black Holes | We examine quantum properties of topological black holes which are asymptotically anti--de Sitter. First, massless scalar fields and Weyl spinors which propagate in the background of an anti--de Sitter black hole are considered in an exactly soluble two--dimensional toy model. The Boulware--, Unruh--, and Hartle--Hawki... | [
"gr-qc"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
5958213 | gr-qc/9803060 | 1998-03-17 | The static spacetime relative acceleration for the general free fall and its possible experimental test | Mishra has recently established, using a generic static metric, the relative local proper-time 3-acceleration of a test-particle in one-dimensional free fall relative to a static reference frame in any static spacetime. In this paper, on the grounds of gravitoelectromagnetism we establish, in a covariant spacetime form... | [
"gr-qc"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119021613 | gr-qc/9803062 | 1998-03-17 | No Time Machine Construction in Open 2+1 Gravity with Timelike Total Energy Momentum | It is shown that in 2+1 dimensional gravity an open spacetime with timelike sources and total energy momentum cannot have a stable compactly generated Cauchy horizon. This constitutes a proof of a version of Kabat's conjecture and shows, in particular, that not only a Gott pair cannot be formed from processes such as t... | [
"gr-qc",
"hep-th"
] | null | [
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{
"author_id": "m tiglio_1",
"name": "Manuel Tiglio",
"publication_history": null,
"h_index": null,
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}
] | null |
5506297 | hep-ph/9803372 | 1998-03-18 | The Quantum Vlasov Equation and its Markov Limit | The adiabatic particle number in mean field theory obeys a quantum Vlasov equation which is nonlocal in time. For weak, slowly varying electric fields this particle number can be identified with the single particle distribution function in phase space, and its time rate of change is the appropriate effective source ter... | [
"hep-ph",
"hep-th"
] | null | [
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] | [] | [
{
"author_id": "y kluger_1",
"name": "Yuval Kluger",
"publication_history": null,
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},
{
"author_id": "e mottola_1",
"name": "Emil Mottola",
"publication_history": null,
"h_index": null,
"num_papers": null,
... | null |
118304498 | chao-dyn/9803025 | 1998-03-18 | An optimal shell model of turbulence | We introduce a new shell model of turbulence which exhibits improved properties in comparison to the standard (and very popular) GOY model. The nonlinear coupling is chosen to minimize correlations between different shells. In particular the second order correlation function is diagonal in the shell index, the third or... | [
"chao-dyn",
"nlin.CD"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
17589609 | astro-ph/9803208 | 1998-03-18 | X-ray Isophote Shapes and the Mass of NGC 3923 | We present analysis of the shape and radial mass distribution of the E4 galaxy NGC 3923 using archival X-ray data from the ROSAT PSPC and HRI. The X-ray isophotes are significantly elongated with ellipticity e_x=0.15 (0.09-0.21) (90% confidence) for semi-major axis a\sim 10h^{-1}_70 kpc and have position angles aligned... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
27370104 | hep-ph/9803400 | 1998-03-20 | The p_T Spectrum in Heavy-Flavour Hadroproduction | We consider the transverse-momentum distribution of heavy flavours in hadronic collisions. We present a formalism in which large transverse-momentum logarithms are resummed at the next-to-leading level, and mass effects are included exactly up to order \alpha_strong^3, so as to retain predictivity at both small and lar... | [
"hep-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
1311627 | astro-ph/9803252 | 1998-03-20 | RVSAO 2.0: Digital Redshifts and Radial Velocities | RVSAO is a set of programs to obtain redshifts and radial velocities from digital spectra. RVSAO operates in the IRAF(Tody 1986, 1993) environment. The heart of the system is xcsao, which implements the cross-correlation method, and is a direct descendant of the system built by Tonry and Davis (1979). emsao uses intell... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
15577518 | quant-ph/9803056 | 1998-03-20 | Quantum repeaters for communication | In quantum communication via noisy channels, the error probability scales exponentially with the length of the channel. We present a scheme of a quantum repeater that overcomes this limitation. The central idea is to connect a string of (imperfect) entangled pairs of particles by using a novel nested purification proto... | [
"quant-ph"
] | null | [
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{
"author_id": "h briegel_1",
"name": "Hans [\"J.\"] Briegel",
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{
"author_id": "w dür_1",
"name": "Wolfgang Dür",
"publication_history": null,
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"num_papers": null... | null |
34939261 | quant-ph/9803057 | 1998-03-20 | Dynamical suppression of decoherence in two-state quantum systems | The dynamics of a decohering two-level system driven by a suitable control Hamiltonian is studied. The control procedure is implemented as a sequence of radiofrequency pulses that repetitively flip the state of the system, a technique that can be termed quantum "bang-bang" control after its classical analog. Decoherenc... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
15403409 | astro-ph/9803256 | 1998-03-21 | Evidence for non-Gaussianity in the COBE DMR Four Year Sky Maps | We introduce and study the distribution of an estimator for the normalized bispectrum of the Cosmic Microwave Background (CMB) anisotropy. We use it to construct a goodness of fit statistic to test the coadded 53 and 90 GHz COBE-DMR 4 year maps for non-Gaussianity. Our results indicate that Gaussianity is ruled out at ... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
7619657 | cmp-lg/9803002 | 1998-03-22 | Time, Tense and Aspect in Natural Language Database Interfaces | Most existing natural language database interfaces (NLDBs) were designed to be used with database systems that provide very limited facilities for manipulating time-dependent data, and they do not support adequately temporal linguistic mechanisms (verb tenses, temporal adverbials, temporal subordinate clauses, etc.). T... | [
"cmp-lg",
"cs.CL"
] | null | [
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] | [
{
"corpus_id": "3265742",
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}
] | [
{
"author_id": "i androutsopoulos_1",
"name": "Ion Androutsopoulos",
"publication_history": null,
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},
{
"author_id": "g ritchie_1",
"name": "Graeme [\"D.\"] Ritchie",
"publication_history": null,
"h_index": null,
... | null |
5593094 | astro-ph/9803260 | 1998-03-22 | Neutron Star Mass Measurements. I. Radio Pulsars | There are now about fifty known radio pulsars in binary systems, including at least five in double neutron star binaries. In some cases, the stellar masses can be directly determined from measurements of relativistic orbital effects. In others, only an indirect or statistical estimate of the masses is possible. We revi... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
6235085 | hep-th/9803195 | 1998-03-24 | A finite cutoff on the string worldsheet? | D-brane backgrounds are specified in closed string theories by holes with appropriate mixed Dirichlet and Neumann boundary conditions on the string worldsheet. As presently stated, the prescription defining D-brane backgrounds is such that the Einstein equation is not equivalent to the condition for scale invariance on... | [
"hep-th"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "v periwal_1",
"name": "Vipul Periwal",
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},
{
"author_id": "o tafjord_1",
"name": "Oyvind Tafjord",
"publication_history": null,
"h_index": null,
"num_papers": null,
... | null |
119450371 | cond-mat/9803286 | 1998-03-24 | Relativistic separable dual-space Gaussian Pseudopotentials from H to Rn | We generalize the concept of separable dual-space Gaussian pseudopotentials to the relativistic case. This allows us to construct this type of pseudopotential for the whole periodic table and we present a complete table of pseudopotential parameters for all the elements from H to Rn. The relativistic version of this ps... | [
"cond-mat.soft"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14160000 | astro-ph/9803284 | 1998-03-24 | On the Evolution of the Cosmic Supernova Rates | Ongoing searches for supernovae (SNe) at cosmological distances have recently started to provide a link between SN Ia statistics and galaxy evolution. We use recent estimates of the global history of star formation to compute the theoretical Type Ia and Type II SN rates as a function of cosmic time from the present epo... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
28539701 | cond-mat/9803344 | 1998-03-27 | Global Optimization by Basin-Hopping and the Lowest Energy Structures of Lennard-Jones Clusters Containing up to 110 Atoms | We describe a global optimization technique using `basin-hopping' in which the potential energy surface is transformed into a collection of interpenetrating staircases. This method has been designed to exploit the features which recent work suggests must be present in an energy landscape for efficient relaxation to the... | [
"cond-mat",
"physics.atm-clus"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
115174 | cmp-lg/9803003 | 1998-03-27 | Nymble: a High-Performance Learning Name-finder | This paper presents a statistical, learned approach to finding names and other non-recursive entities in text (as per the MUC-6 definition of the NE task), using a variant of the standard hidden Markov model. We present our justification for the problem and our approach, a detailed discussion of the model itself and fi... | [
"cmp-lg",
"cs.CL"
] | null | [
"target.author.publication_history",
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] | [] | [
{
"author_id": "d bikel_1",
"name": "Daniel [\"M.\"] Bikel",
"publication_history": null,
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},
{
"author_id": "s miller_5",
"name": "Scott Miller",
"publication_history": null,
"h_index": null,
"num_papers": nul... | null |
264960513 | astro-ph/9803317 | 1998-03-27 | Topological Analysis of High-Resolution CMB Maps | We report the development of numerical tools for the topological analysis of sub--degree resolution, all--sky maps. Software to be released in the HEALFAST (V0.9) package defines neighbour relationships for the HEALPIX tessellation of the sphere. We apply this routine to a fast extrema search which scales strictly line... | [
"astro-ph"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "b wandelt_1",
"name": "Benjamin [\"D.\"] Wandelt",
"publication_history": null,
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},
{
"author_id": "e hivon_1",
"name": "Eric Hivon",
"publication_history": null,
"h_index": null,
"num_papers": ... | null |
2539694 | chao-dyn/9804001 | 1998-03-27 | Non-Equilibrium Statistical Mechanics of Anharmonic Chains Coupled to Two Heat Baths at Different Temperatures | We study the statistical mechanics of a finite-dimensional non-linear Hamiltonian system (a chain of anharmonic oscillators) coupled to two heat baths (described by wave equations). Assuming that the initial conditions of the heat baths are distributed according to the Gibbs measures at two different temperatures we st... | [
"chao-dyn",
"math-ph",
"math.DS",
"math.MP",
"nlin.CD"
] | null | [
"target.author.publication_history",
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] | [] | [
{
"author_id": "j eckmann_1",
"name": "Jean-Pierre Eckmann",
"publication_history": null,
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},
{
"author_id": "c pillet_1",
"name": "Claude-Alain Pillet",
"publication_history": null,
"h_index": null,
"num_paper... | null |
14090818 | astro-ph/9803338 | 1998-03-31 | ESO Imaging Survey II. Searching for Distant Clusters of Galaxies | Preliminary results of a search for distant clusters of galaxies using the recently released I-band data obtained by the ESO Imaging Survey are presented. In this first installment of the survey, data covering about 3 square degrees in I-band are being used. The matched filter algorithm is applied to two sets of frames... | [
"astro-ph"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "l olsen_1",
"name": "L. [\"F.\"] Olsen",
"publication_history": null,
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},
{
"author_id": "m scodeggio_2",
"name": "Marco Scodeggio",
"publication_history": null,
"h_index": null,
"num_papers": n... | null |
59149525 | cond-mat/9803391 | 1998-03-31 | Tight-binding parameterization for photonic band gap materials | The ideas of the linear combination of atomic orbitals (LCAO) method, well known from the study of electrons, is extended to the classical wave case. The Mie resonances of the isolated scatterer in the classical wave case, are analogous to the localized eigenstates in the electronic case. The matrix elements of the two... | [
"cond-mat.dis-nn"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
1918105 | quant-ph/9804001 | 1998-04-01 | Optimal Cloning of Pure States | We construct the unique optimal quantum device for turning a finite number of d-level quantum systems in the same unknown pure state \sigma into M systems of the same kind, in an approximation of the M-fold tensor product of the state \sigma. | [
"quant-ph"
] | null | [
"target.key_reference"
] | null | null | null |
16871127 | astro-ph/9804005 | 1998-04-01 | Keck Spectra of Pleiades Brown Dwarf Candidates and a Precise Determination of the Lithium Depletion Edge in the Pleiades | We have obtained intermediate resolution spectra of eleven candidate brown dwarf members of the Pleiades open cluster using the Keck II telescope and LRIS spectrograph. Our primary goal was to determine the location of the "lithium depletion edge" in the Pleiades and hence to derive a precise age for the cluster. All b... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
8403566 | hep-ph/9804221 | 1998-04-02 | Possibility of spontaneous parity violation in hot QCD | We suggest that for QCD in the limit of a large number of colors, N, the axial U(1) symmetry of massless quarks is effectively restored at the deconfining=chiral phase transition. If the deconfining transition is of second order, then the chiral transition is weakly first order. In this case, metastable states in which... | [
"hep-ph",
"nucl-th"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
49234097 | cond-mat/9804012 | 1998-04-02 | Quantum magnetism in the stripe phase: bond- versus site order | It is argued that the spin dynamics in the charge-ordered stripe phase might be revealing with regards to the nature of the anomalous spin dynamics in cuprate superconductors. Specifically, if the stripes are bond ordered much of the spin fluctuation will originate in the spin sector itself, while site ordered stripes ... | [
"cond-mat.str-el"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
1197149 | astro-ph/9804041 | 1998-04-04 | Computing CMB Anisotropy in Compact Hyperbolic Spaces | The measurements of CMB anisotropy have opened up a window for probing the global topology of the universe on length scales comparable to and beyond the Hubble radius. For compact topologies, the two main effects on the CMB are: (1) the breaking of statistical isotropy in characteristic patterns determined by the photo... | [
"astro-ph",
"gr-qc"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
1529836 | hep-ex/9804003 | 1998-04-05 | Search for a new gauge boson in $\pi^{0}$ decays | A search was made for a new light gauge boson $X$ which might be produced in $\pi^{0}\to\gamma + X$ decay from neutral pions generated by 450-GeV protons in the CERN SPS neutrino target. The X's would penetrate the downstream shielding and be observed in the NOMAD detector via the Primakoff effect, in the process of $X... | [
"hep-ex"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "j altegoer_0",
"name": "J. Altegoer",
"publication_history": null,
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},
{
"author_id": "p astier_1",
"name": "Pierre Astier",
"publication_history": null,
"h_index": null,
"num_papers": null,
... | null |
118955579 | gr-qc/9804014 | 1998-04-05 | Data analysis of gravitational-wave signals from spinning neutron stars. I. The signal and its detection | We present a theoretical background for the data analysis of the gravitational-wave signals from spinning neutron stars for Earth-based laser interferometric detectors. We introduce a detailed model of the signal including both the frequency and the amplitude modulations. We include the effects of the intrinsic frequen... | [
"gr-qc"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
55576716 | astro-ph/9804068 | 1998-04-07 | A statistical study of the spectra of very luminous IRAS galaxies. II.Spectral and environmental analysis | Spectroscopic observations of a sample of 73 very luminous IRAS galaxies (log(LIR/Lsun)>=11.5 for H0=50km s^{-1} Mpc^{-1},q0=0.5) from the 2Jy red- shift survey catalogue were carried out using the 2.16m telescope at the Beijing Astronomical Observatory. The observational data, including the optical images (extracted f... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
16095583 | astro-ph/9804103 | 1998-04-09 | A Unifying View of the Spectral Energy Distributions of Blazars | We collect data from the radio to the gamma-ray range for three complete samples of blazars: the Slew Survey and the 1Jy samples of BL Lacs and the 2Jy sample of Flat Spectrum Radio-Loud Quasars (FSRQs). The fraction of objects detected in gamma-rays (E > 100 MeV) is 17%, 26% and 40% in the three samples respectively. ... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
1172818 | astro-ph/9804108 | 1998-04-10 | The Orbital Evolution and Proper Motion of PSR J2051-0827 | We have carried out high-precision timing observations of the eclipsing binary PSR J2051-0827 in the 3.3 years since its discovery. These data indicate that the orbital period is decreasing at a rate of dPb/dt = (-11+-1)X10^-12. If secular, this orbital period derivative implies a decay time for the orbit of only 25 My... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
15401113 | hep-ph/9804275 | 1998-04-12 | Heavy quark expansion in beauty and its decays | I give an introduction to the QCD-based theory of the heavy flavor hadrons and their weak decays. Trying to remain at the next-to-elementary level and skip technicalities, I concentrate on the qualitative description of the most important applications and physical meaning of the theoretical statements. The numerical re... | [
"hep-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
18961213 | quant-ph/9804031 | 1998-04-12 | Optimal distinction between non-orthogonal quantum states | Given a finite set of linearly independent quantum states, an observer who examines a single quantum system may sometimes identify its state with certainty. However, unless these quantum states are orthogonal, there is a finite probability of failure. A complete solution is given to the problem of optimal distinction o... | [
"quant-ph"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "a peres_1",
"name": "Asher Peres",
"publication_history": null,
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},
{
"author_id": "d terno_1",
"name": "Daniel [\"R.\"] Terno",
"publication_history": null,
"h_index": null,
"num_papers": null,... | null |
119666597 | cond-mat/9804130 | 1998-04-13 | Atomic Scattering in Presence of an External Confinement and a Gas of Impenetrable Bosons | We calculate, within the pseudopotential approximation, a one-dimensional scattering amplitude and effective one-dimensional interaction potential for atoms confined transversally by an atom waveguide or highly elongated ``cigar''-shaped atomic trap. We show that in the low-energy scattering regime, the scattering proc... | [
"cond-mat",
"math-ph",
"math.MP",
"physics.atom-ph",
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
17193249 | nucl-th/9804027 | 1998-04-13 | The equation of state for nucleon matter and neutron star structure | Properties of dense nucleon matter and the structure of neutron stars are studied using variational chain summation methods and the new Argonne v18 two-nucleon interaction. The neutron star gravitational mass limit obtained with this interaction is 1.67 M_{solar}. Boost corrections to the two-nucleon interaction, which... | [
"nucl-th",
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
13326799 | quant-ph/9804034 | 1998-04-14 | Some Notes on Parallel Quantum Computation | We exhibit some simple gadgets useful in designing shallow parallel circuits for quantum algorithms. We prove that any quantum circuit composed entirely of controlled-not gates or of diagonal gates can be parallelized to logarithmic depth, while circuits composed of both cannot. Finally, while we note the Quantum Fouri... | [
"quant-ph"
] | null | [
"target.key_reference"
] | null | null | null |
127402 | astro-ph/9804141 | 1998-04-14 | Clustering at High Redshift: Precise Constraints from a Deep, Wide Area Survey | We present constraints on the evolution of large-scale structure from a catalog of 710,000 galaxies with I_AB <= 24 derived from a KPNO 4m CCD imaging survey of a contiguous 4 deg x 4 deg region. The advantage of using large contiguous surveys for measuring clustering properties on even modest angular scales is substan... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
5793776 | astro-ph/9804157 | 1998-04-16 | Hyperstrong Radio-Wave Scattering in the Galactic Center. II. A Likelihood Analysis of Free Electrons in the Galactic Center | The scattering diameters of Sgr A* and several nearby OH masers (~ 1" at 1 GHz) indicate that a region of enhanced scattering is along the line of sight to the Galactic center. We combine radio-wave scattering data and free-free emission and absorption measurements in a likelihood analysis that constrains the following... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
976881 | q-bio/0309027 | 1998-04-16 | Measuring the dynamics of neural responses in primary auditory cortex | We review recent developments in the measurement of the dynamics of the response properties of auditory cortical neurons to broadband sounds, which is closely related to the perception of timbre. The emphasis is on a method that characterizes the spectro-temporal properties of single neurons to dynamic, broadband sound... | [
"q-bio.NC"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "d depireux_1",
"name": "Didier [\"A.\"] Depireux",
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},
{
"author_id": "j simon_4",
"name": "Jonathan [\"Z.\"] Simon",
"publication_history": null,
"h_index": null,
"... | null |
17054156 | cond-mat/9804172 | 1998-04-16 | Phase Behavior of Binary Fluid Mixtures Confined in a Model Aerogel | It is found experimentally that the coexistence region of a vapor-liquid system or a binary mixture is substantially narrowed when the fluid is confined in a aerogel with a high degree of porosity (e.g. of the order of 95% to 99%). A Hamiltonian model for this system has recently been introduced (J.Donley PRE 55:539, 1... | [
"cond-mat.stat-mech",
"cond-mat.dis-nn",
"cond-mat.mtrl-sci"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "r salazar_1",
"name": "R. Salazar",
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},
{
"author_id": "r toral_1",
"name": "Raúl Toral",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_... | null |
54198206 | astro-ph/9804172 | 1998-04-17 | ENACSVII, Galaxy density profiles of rich clusters of galaxies | We have analyzed the projected galaxy distributions in a subset of the ENACS/ COSMOS cluster sample. We made Maximum-Likelihood fits to the distribution of COSMOS galaxies for 4 theoretical profiles, with `cores' (generalized King- and Hubble-profiles) and with `cusps' (generalized Navarro et al., or NFW, and de Vaucou... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
1173960 | quant-ph/9804043 | 1998-04-17 | Dense Quantum Coding and a Lower Bound for 1-way Quantum Automata | We consider the possibility of encoding m classical bits into much fewer n quantum bits so that an arbitrary bit from the original m bits can be recovered with a good probability, and we show that non-trivial quantum encodings exist that have no classical counterparts. On the other hand, we show that quantum encodings ... | [
"quant-ph",
"cs.CC"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
41056059 | nucl-th/9804035 | 1998-04-18 | Evidence of early multi-strange hadron freeze-out in high energy nuclear collisions | Recently reported transverse momentum distributions of strange hadrons produced in Pb(158AGeV) on Pb collisions and corresponding results from the relativistic quantum molecular dynamics (RQMD) approach are examined. We argue that the experimental observations favor a scenario in which multi-strange hadrons are formed ... | [
"nucl-th"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
11541437 | gr-qc/9804044 | 1998-04-20 | Gravitational waves from hot young rapidly rotating neutron stars | Gravitational radiation drives an instability in the r-modes of young rapidly rotating neutron stars. This instability is expected to carry away most of the angular momentum of the star by gravitational radiation emission, leaving a star rotating at about 100 Hz. In this paper we model in a simple way the development o... | [
"gr-qc"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119026922 | cond-mat/9804229 | 1998-04-21 | Inelastic collapse of a randomly forced particle | We consider a randomly forced particle moving in a finite region, which rebounds inelastically with coefficient of restitution r on collision with the boundaries. We show that there is a transition at a critical value of r, r_c\equiv e^{-\pi/\sqrt{3}}, above which the dynamics is ergodic but beneath which the particle ... | [
"cond-mat.stat-mech",
"cond-mat.mtrl-sci"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14752929 | math/9804105 | 1998-04-22 | Signatures and Higher Signatures of $S^1$-Quotients | We define and study the signature, A-hat genus and higher signatures of the quotient space of an $S^1$-action on a closed oriented manifold. We give applications to questions of positive scalar curvature and to an Equivariant Novikov Conjecture. | [
"math.DG"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119376037 | cond-mat/9804245 | 1998-04-22 | Heisenberg antiferromagnet on the square lattice for S>=1 | Theoretical predictions of a semiclassical method - the pure-quantum self-consistent harmonic approximation - for the correlation length and staggered susceptibility of the Heisenberg antiferromagnet on the square lattice (2DQHAF) agree very well with recent quantum Monte Carlo data for S=1, as well as with experimenta... | [
"cond-mat"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "a cuccoli_1",
"name": "Alessandro Cuccoli",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "v tognetti_1",
"name": "Valerio Tognetti",
"publication_history": null,
"h_index": null,
"num_papers"... | null |
16412109 | astro-ph/9804238 | 1998-04-23 | Numerical Investigations of Weak Lensing by Large-Scale Structure | We use numerical simulations of ray tracing through N-body simulations to investigate weak lensing by large-scale structure. These are needed for testing the analytic predictions of two-point correlators, to set error estimates on them and to investigate nonlinear gravitational effects in the weak lensing maps. On scal... | [
"astro-ph"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "b jain_1",
"name": "Bhuvnesh Jain",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "u seljak_2",
"name": "Uroš Seljak",
"publication_history": null,
"h_index": null,
"num_papers": null,
"nu... | null |
36114913 | cond-mat/9804280 | 1998-04-25 | Quantum Annealing in the Transverse Ising Model | We introduce quantum fluctuations into the simulated annealing process of optimization problems, aiming at faster convergence to the optimal state. Quantum fluctuations cause transitions between states and thus play the same role as thermal fluctuations in the conventional approach. The idea is tested by the transverse... | [
"cond-mat.stat-mech",
"cond-mat.dis-nn"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14154472 | quant-ph/9804064 | 1998-04-27 | Probabilistic cloning and identification of linearly independent quantum states | We construct a probabilistic quantum cloning machine by a general unitary-reduction operation. With a postselection of the measurement results, the machine yields faithful copies of the input states. It is shown that the states secretly chosen from a certain set $\$=\left\{\left| \Psi_1\right> ,\left| \Psi_2\right> ,..... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119351520 | cond-mat/9804299 | 1998-04-28 | Macroscopic Equations of Motion for Two Phase Flow in Porous Media | The established macroscopic equations of motion for two phase immiscible displacement in porous media are known to be physically incomplete because they do not contain the surface tension and surface areas governing capillary phenomena. Therefore a more general system of macroscopic equations is derived here which inco... | [
"cond-mat.mtrl-sci"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2348 | quant-ph/9804066 | 1998-04-28 | The quantum query complexity of approximating the median and related statistics | Let X = (x_0,...,x_{n-1})$ be a sequence of n numbers. For \epsilon > 0, we say that x_i is an \epsilon-approximate median if the number of elements strictly less than x_i, and the number of elements strictly greater than x_i are each less than (1+\epsilon)n/2. We consider the quantum query complexity of computing an \... | [
"quant-ph",
"cs.CC"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
9533175 | astro-ph/9804314 | 1998-04-29 | Clustering of X-ray selected Active Galactic Nuclei | A total of 235 Active Galactic Nuclei (AGN) from two different soft X-ray surveys (the ROSAT Deep Survey -DRS- and the ROSAT International X-ray Optical Survey -RIXOS-) with redshifts between 0 and 3.5 are used to study the clustering of X-ray selected AGN and its evolution. A 2 sigma significant detection of clusterin... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
7061410 | adap-org/9804004 | 1998-04-30 | Dynamics of Individual Specialization and Global Diversification in Communities | We discuss a model of an economic community consisting of $N$ interacting agents. The state of each agent at any time is characterized, in general, by a mixed strategy profile drawn from a space of $s$ pure strategies. The community evolves as agents update their strategy profiles in response to payoffs received from o... | [
"adap-org",
"cond-mat",
"nlin.AO"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "v borkar_1",
"name": "Vivek [\"S.\"] Borkar",
"publication_history": null,
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},
{
"author_id": "s jain_62",
"name": "Sanjay Jain",
"publication_history": null,
"h_index": null,
"num_papers": null... | null |
3190335 | adap-org/9804003 | 1998-04-30 | Collective Behaviour and Diversity in Economic Communities: Some Insights from an Evolutionary Game | Many complex adaptive systems contain a large diversity of specialized components. The specialization at the level of the microscopic degrees of freedom, and diversity at the level of the system as a whole are phenomena that appear during the course of evolution of the system. We present a mathematical model to describ... | [
"adap-org",
"cond-mat",
"nlin.AO"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "v borkar_1",
"name": "Vivek [\"S.\"] Borkar",
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},
{
"author_id": "s jain_62",
"name": "Sanjay Jain",
"publication_history": null,
"h_index": null,
"num_papers": null... | null |
14240854 | astro-ph/9805010 | 1998-05-02 | Polarization of Microwave Background: Statistical and Physical Properties | We discuss statistical and physical properties of cosmic microwave background polarization, both in Fourier and in real space. The latter allows for a more intuitive understanding of some of the geometric signatures. We present expressions that relate electric and magnetic type of polarization to the measured Stokes pa... | [
"astro-ph"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "u seljak_2",
"name": "Uroš Seljak",
"publication_history": null,
"h_index": null,
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"num_citations": null
},
{
"author_id": "m zaldarriaga_1",
"name": "Matias Zaldarriaga",
"publication_history": null,
"h_index": null,
"num_papers": n... | null |
17631910 | gr-qc/9805005 | 1998-05-03 | Plane torsion waves in quadratic gravitational theories | The definition of the Riemann-Cartan space of the plane wave type is given. The condition under which the torsion plane waves exist is found. It is expressed in the form of the restriction imposed on the coupling constants of the 10-parametric quadratic gravitational Lagrangian. In the mathematical appendix the formula... | [
"gr-qc"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
16244627 | cond-mat/9805034 | 1998-05-04 | Factors that Affect the Folding Ability of Proteins | The folding ability of a heteropolymer model for proteins subject to Monte Carlo dynamics on a simple cubic lattice is shown to be strongly correlated with the energy gap between the native state and the structurally dissimilar part of the spectrum. We consider a number of estimates of the energy gap that can be determ... | [
"cond-mat",
"q-bio"
] | null | [
"target.author.publication_history"
] | [
{
"corpus_id": "2574696",
"num_citations": null
}
] | [
{
"author_id": "a dinner_1",
"name": "Aaron [\"R.\"] Dinner",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "v abkevich_0",
"name": "Victor Abkevich",
"publication_history": null,
"h_index": null,
"num_papers... | null |
2264708 | hep-ph/9805219 | 1998-05-04 | Pathways to Naturally Small Neutrino Masses | In the minimal standard electroweak gauge model, there is an effective dimension-five operator which generates neutrino masses, and it has only three tree-level realizations. One is the canonical seesaw mechanism with a right-handed neutrino. Another is having a heavy Higgs triplet as recently proposed. The third is to... | [
"hep-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
118961055 | hep-th/9805028 | 1998-05-05 | Type IIB superstring action in AdS_5 x S^5 background | We construct the covariant kappa-symmetric superstring action for a type IIB superstring on AdS_5 x S^5 background. The action is defined as a 2d sigma-model on the coset superspace SU(2,2|4) / SO(4,1) x SO(5) and is shown to be the unique one that has the correct bosonic and flat space limits. | [
"hep-th"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119449704 | cond-mat/9805047 | 1998-05-05 | Spectral shapes of solid neon | We present a Path Integral Monte Carlo calculation of the first three moments of the displacement-displacement correlation functions of solid neon at different temperatures for longitudinal and transverse phonon modes. The Lennard-Jones potential is considered. The relevance of the quantum effects on the frequency posi... | [
"cond-mat"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "g pedrolli_1",
"name": "Gaia Pedrolli",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "a cuccoli_1",
"name": "Alessandro Cuccoli",
"publication_history": null,
"h_index": null,
"num_papers": n... | null |
3261520 | cmp-lg/9805001 | 1998-05-05 | Valence Induction with a Head-Lexicalized PCFG | This paper presents an experiment in learning valences (subcategorization frames) from a 50 million word text corpus, based on a lexicalized probabilistic context free grammar. Distributions are estimated using a modified EM algorithm. We evaluate the acquired lexicon both by comparison with a dictionary and by entropy... | [
"cmp-lg",
"cs.CL"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14280877 | math-ph/9805005 | 1998-05-06 | A Guide to Entropy and the Second Law of Thermodynamics | This article is a short version of a longer article to appear in Physics Reports (cond-mat/9708200). The essential postulates of classical thermodynamics are formulated, from which the second law is deduced as the principle of increase of entropy in irreversible adiabatic processes that take one equilibrium state to an... | [
"math-ph",
"cond-mat.soft",
"cond-mat.stat-mech",
"math.MP"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119341112 | quant-ph/9805019 | 1998-05-07 | Optimal eavesdropping in quantum cryptography with six states | A generalization of the quantum cryptographic protocol by Bennett and Brassard is discussed, using three conjugate bases, i.e. six states. By calculating the optimal mutual information between sender and eavesdropper it is shown that this scheme is safer against eavesdropping on single qubits than the one based on two ... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119407512 | cond-mat/9805084 | 1998-05-07 | On the Minority Game : Analytical and Numerical Studies | We investigate further several properties of the minority game we have recently introduced. We explain the origin of the phase transition and give an analytical expression of $\sigma^2/N$ in the $N\ll2^M$ region. The ability of the players to learn a given payoff is also analyzed, and we show that the Darwinian evoluti... | [
"cond-mat.stat-mech"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119107606 | cond-mat/9805078 | 1998-05-07 | Low-energy sector of the S=1/2 Kagome antiferromagnet | Starting from a modified version of the the S=1/2 Kagome antiferromagnet to emphasize the role of elementary triangles, an effective Hamiltonian involving spin and chirality variables is derived. A mean-field decoupling that retains the quantum nature of these variables is shown to yield a Hamiltonian that can be solve... | [
"cond-mat.str-el"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
18867347 | cond-mat/9805102 | 1998-05-08 | A Mathematical Model for Behavioral Changes by Pair Interactions and Its Relation to Game Theory | A mathematical model for behavioral changes by pair interactions (i.e. due to direct contact) of individuals is developed. Three kinds of pair interactions can be distinguished: Imitative processes, avoidance processes, and compromising processes. Representative solutions of the model for two different interacting subp... | [
"cond-mat.stat-mech",
"chao-dyn",
"nlin.CD",
"nlin.PS",
"patt-sol"
] | null | [
"target.author.publication_history.key_reference",
"target.key_reference"
] | null | null | null |
8357750 | math/9805046 | 1998-05-09 | Eta invariants of Dirac operators on Circle bundles over Riemann surfaces and virtual dimensions of finite energy Seiberg-Witten moduli spaces | We compute eta invariants of various Dirac type operators on circle bundles over Riemann surfaces via two approaches: an adiabatic approach based on the results of Bismut-Cheeger-Dai and a direct elementary one. These results, coupled with some delicate spectral flow computations are then used to determine the virtual ... | [
"math.DG"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119362598 | nucl-ex/9805001 | 1998-05-12 | Methods for analyzing anisotropic flow in relativistic nuclear collisions | The strategy and techniques for analyzing anisotropic flow (directed, elliptic, etc.) in relativistic nuclear collisions are presented. The emphasis is on the use of the Fourier expansion of azimuthal distributions. We present formulae relevant for this approach, and in particular, show how the event multiplicity enter... | [
"nucl-ex",
"nucl-th"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
118960457 | astro-ph/9805172 | 1998-05-13 | Detection of HI 21cm Absorption by the Warm Neutral Medium | We have detected HI 21cm line absorption by the Warm Neutral Medium (WNM) using the Westerbork Synthesis Radio Telescope. The absorption was detected toward Cygnus A at LSR velocities of -40 and -70 km s^{-1}. These two velocity ranges were previously identified as being relatively free of cold absorbing clouds. The me... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
207797753 | astro-ph/9805196 | 1998-05-14 | A Review of the High-Redshift Supernova Searches | Observations show that Type Ia Supernovae (SNe Ia) form a homogeneous class of objects. They share similar spectroscopic evolution, light-curve shapes, and peak absolute magnitudes. The slight departures from homogeneity that are observed can be used to produce a "calibrated candle" with corrected magnitudes with even ... | [
"astro-ph"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "a kim_4",
"name": "Alex [\"G\"] Kim",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
}
] | null |
15640044 | astro-ph/9805201 | 1998-05-15 | Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant | We present observations of 10 type Ia supernovae (SNe Ia) between 0.16 < z < 0.62. With previous data from our High-Z Supernova Search Team, this expanded set of 16 high-redshift supernovae and 34 nearby supernovae are used to place constraints on the Hubble constant (H_0), the mass density (Omega_M), the cosmological ... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference",
"target.key_reference"
] | null | null | null |
15762698 | astro-ph/9805200 | 1998-05-15 | The High-Z Supernova Search: Measuring Cosmic Deceleration and Global Cur vature of the Universe Using Type Ia Supernovae | The High-Z Supernova Search is an international collaboration to discover and monitor type Ia supernovae (SN Ia) at $z > 0.2$ with the aim of measuring cosmic deceleration and global curvature. Our collaboration has pursued a basic understanding of supernovae in the nearby Universe, discovering and observing a large sa... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
24059522 | cmp-lg/9805007 | 1998-05-19 | Parsing Inside-Out | The inside-outside probabilities are typically used for reestimating Probabilistic Context Free Grammars (PCFGs), just as the forward-backward probabilities are typically used for reestimating HMMs. I show several novel uses, including improving parser accuracy by matching parsing algorithms to evaluation criteria; spe... | [
"cmp-lg",
"cs.CL"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
5771125 | cond-mat/9805244 | 1998-05-20 | Social Force Model for Pedestrian Dynamics | It is suggested that the motion of pedestrians can be described as if they would be subject to `social forces'. These `forces' are not directly exerted by the pedestrians' personal environment, but they are a measure for the internal motivations of the individuals to perform certain actions (movements). The correspondi... | [
"cond-mat.stat-mech",
"nlin.PS",
"patt-sol"
] | null | [
"target.author.publication_history.key_reference",
"target.key_reference"
] | null | null | null |
2018036 | math/9805087 | 1998-05-20 | On a twisted de Rham complex | We show that, given a projective regular function f on a smooth quasi-projective variety over C, the corresponding cohomology groups of the algebraic de Rham complex with twisted differential d-df and of the complex of algebraic forms with differential df have the same dimension (a result announced by Barannikov and Ko... | [
"math.AG"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
53679627 | astro-ph/9805281 | 1998-05-21 | The Faint End of the Luminosity Function in Abell 426 and 539 | We derive $I$ band luminosity functions for galaxies in Abell 426 (Perseus and Abell 539, two rich, low galactic latitude clusters at moderate redshift. Cluster members are selected via the color-magnitude relation for bright galaxies. We find $\alpha=-1.56 \pm 0.07$ for Perseus over the range $-19.4 < M_I < -13.4$ ($1... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
17027719 | astro-ph/9805283 | 1998-05-21 | Clustering of Galaxies in a Hierarchical Universe: I. Methods and Results at z=0 | We introduce a new technique for following the formation and evolution of galaxies in cosmological N-body simulations. Dissipationless simulations are used to track the formation and merging of dark matter halos as a function of redshift. Simple prescriptions, taken directly from semi-analytic models of galaxy formatio... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14930700 | cond-mat/9805286 | 1998-05-22 | The Johnson-Segalman model with a diffusion term in Couette flow | We study the Johnson-Segalman (JS) model as a paradigm for some complex fluids which are observed to phase separate, or ``shear-band'' in flow. We analyze the behavior of this model in cylindrical Couette flow and demonstrate the history dependence inherent in the local JS model. We add a simple gradient term to the st... | [
"cond-mat.soft",
"nlin.PS",
"patt-sol",
"physics.flu-dyn"
] | null | [
"target.author.publication_history"
] | [
{
"corpus_id": "119479348",
"num_citations": null
}
] | [
{
"author_id": "p olmsted_1",
"name": "Peter [\"D.\"] Olmsted",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "o radulescu_1",
"name": "Ovidiu Radulescu",
"publication_history": null,
"h_index": null,
"num_pa... | null |
16282948 | quant-ph/9805067 | 1998-05-22 | The broadcast quantum channel for classical information transmission | It is well known that quantum theory forbids the exact copying of an unknown quantum state. Therefore in broadcasting of classical information by a quantum channel an additional contribution to the error in the decoding is expected. We consider the optimal copying transformation which is adapted to classical informatio... | [
"quant-ph"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "a allahverdyan_1",
"name": "Armen [\"E.\"] Allahverdyan",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "d saakian_1",
"name": "David [\"B.\"] Saakian",
"publication_history": null,
"h_index": nul... | null |
14351348 | quant-ph/9805066 | 1998-05-22 | On Reichenbach's common cause principle and Reichenbach's notion of common cause | It is shown that, given any finite set of pairs of random events in a Boolean algebra which are correlated with respect to a fixed probability measure on the algebra, the algebra can be extended in such a way that the extension contains events that can be regarded as common causes of the correlations in the sense of Re... | [
"quant-ph",
"math-ph",
"math.MP",
"math.PR"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
9170656 | math-ph/9805021 | 1998-05-25 | A unified approach to Hamiltonian systems, Poisson systems, gradient systems, and systems with Lyapunov functions and/or first integrals | Systems with a first integral (i.e., constant of motion) or a Lyapunov function can be written as ``linear-gradient systems'' $\dot x= L(x)\nabla V(x)$ for an appropriate matrix function $L$, with a generalization to several integrals or Lyapunov functions. The discrete-time analogue, $\Delta x/\Delta t = L \bar\nabla ... | [
"math-ph",
"math.DS",
"math.MP",
"math.NA"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
55578669 | cond-mat/9805329 | 1998-05-26 | Cold bosonic atoms in optical lattices | The dynamics of an ultracold dilute gas of bosonic atoms in an optical lattice can be described by a Bose-Hubbard model where the system parameters are controlled by laser light. We study the continuous (zero temperature) quantum phase transition from the superfluid to the Mott insulator phase induced by varying the de... | [
"cond-mat.stat-mech"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14425863 | hep-th/9805171 | 1998-05-26 | Bulk vs. Boundary Dynamics in Anti-de Sitter Spacetime | We investigate the details of the bulk-boundary correspondence in Lorentzian signature anti-de Sitter space. Operators in the boundary theory couple to sources identified with the boundary values of non-normalizable bulk modes. Such modes do not fluctuate and provide classical backgrounds on which bulk excitations prop... | [
"hep-th",
"gr-qc"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14147978 | quant-ph/9805082 | 1998-05-27 | Quantum Counting | We study some extensions of Grover's quantum searching algorithm. First, we generalize the Grover iteration in the light of a concept called amplitude amplification. Then, we show that the quadratic speedup obtained by the quantum searching algorithm over classical brute force can still be obtained for a large family o... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119080308 | astro-ph/9805327 | 1998-05-27 | Star Formation Rates in Faint Radio Galaxies | The decimetric radio continuum luminosity of a star-forming galaxy appears to be directly proportional to the rate of formation of supernovae in the galaxy. Since decimetric radiation does not suffer significant extinction and is not directive, radio luminosities may thus provide a particularly straightforward way to d... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
1228 | cmp-lg/9805009 | 1998-05-27 | Discovery of Linguistic Relations Using Lexical Attraction | This work has been motivated by two long term goals: to understand how humans learn language and to build programs that can understand language. Using a representation that makes the relevant features explicit is a prerequisite for successful learning and understanding. Therefore, I chose to represent relations between... | [
"cmp-lg",
"cs.CL"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "d yuret_1",
"name": "Deniz Yuret",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
}
] | null |
18061631 | hep-ph/9504318 | 1998-05-27 | A proposal to search for a monochromatic component of solar axions using $^{57}$Fe | A new experimental scheme is proposed to search for almost monochromatic solar axions, whose existence has not been discussed heretofore. The axions would be produced when thermally excited $^{57}$Fe in the sun relaxes to its ground state and could be detected via resonant excitation of the same nuclide in a laboratory... | [
"hep-ex"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
119336226 | cond-mat/9805373 | 1998-05-28 | A mode-coupling theory for the pasty rheology of soft glassy materials | In this paper, we introduce a simple mode-coupling model for concentrated suspensions under flow . This model exhibits a jamming transition, and stress vs shear rate relations which are very similar to experimental results. Namely newtonian regime or yield stress are followed by a slow variation of the stress for highe... | [
"cond-mat.soft"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
17000363 | astro-ph/9805360 | 1998-05-29 | Astrometric Microlensing of Stars | Due to dramatic improvements in the precision of astrometric measurements, the observation of light centroid shifts in observed stars due to intervening massive compact objects (`astrometric microlensing') will become possible in the near future. Upcoming space missions, such as SIM and GAIA, will provide measurements ... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
5362882 | cmp-lg/9805011 | 1998-05-29 | Automatic summarising: factors and directions | This position paper suggests that progress with automatic summarising demands a better research methodology and a carefully focussed research strategy. In order to develop effective procedures it is necessary to identify and respond to the context factors, i.e. input, purpose, and output factors, that bear on summarisi... | [
"cmp-lg",
"cs.CL"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14447273 | solv-int/9806002 | 1998-06-01 | Bihamiltonian Geometry, Darboux Coverings, and Linearization of the KP Hierarchy | We use ideas of the geometry of bihamiltonian manifolds, developed by Gel'fand and Zakharevich, to study the KP equations. In this approach they have the form of local conservation laws, and can be traded for a system of ordinary differential equations of Riccati type, which we call the Central System. We show that the... | [
"solv-int",
"nlin.SI"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
12966494 | astro-ph/9806093 | 1998-06-05 | Radio Wavelength Constraints on the Sources of the Far Infrared Background | The cosmic far infrared background detected recently by the COBE-DIRBE team is presumably due, in large part, to the far infrared (FIR) emission from all galaxies. We take the well-established correlation between FIR and radio luminosity for individual galaxies and apply it to the FIR background. We find that these sou... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2994015 | math/9806029 | 1998-06-07 | Exceptional quotient singularities | A singularity is said to be exceptional (in the sense of V. Shokurov), if for any log canonical boundary, there is at most one exceptional divisor of discrepancy -1. In our previous paper (math.AG/9805004) we found two examples of exceptional canonical singularities: these are quotients by Klein's simple group of order... | [
"math.AG"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
7612363 | quant-ph/9806024 | 1998-06-07 | Convex probability domain of generalized quantum measurements | Generalized quantum measurements with N distinct outcomes are used for determining the density matrix, of order d, of an ensemble of quantum systems. The resulting probabilities are represented by a point in an N-dimensional space. It is shown that this point lies in a convex domain having at most d^2-1 dimensions. | [
"quant-ph"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "a peres_1",
"name": "Asher Peres",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "d terno_1",
"name": "Daniel [\"R.\"] Terno",
"publication_history": null,
"h_index": null,
"num_papers": null,... | null |
15095703 | quant-ph/9806029 | 1998-06-08 | Quantum Circuits with Mixed States | We define the model of quantum circuits with density matrices, where non-unitary gates are allowed. Measurements in the middle of the computation, noise and decoherence are implemented in a natural way in this model, which is shown to be equivalent in computational power to standard quantum circuits. The main result in... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
17367600 | hep-lat/9806009 | 1998-06-08 | Resummation of Cactus Diagrams in Lattice QCD | We show how to perform a resummation, to all orders in perturbation theory, of a certain class of gauge invariant diagrams in Lattice QCD. These diagrams are often largely responsible for lattice artifacts. Our resummation leads to an improved perturbative expansion. Applied to a number of cases of interest, this expan... | [
"hep-lat"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
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