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11555028
astro-ph/9808334
1998-08-28
Nonparametric Methods for Doubly Truncated Data
Truncated data plays an important role in the statistical analysis of astronomical observations as well as in survival analysis. The motivating example for this paper concerns a set of measurements on quasars in which there is double truncation. That is, the quasars are only observed if their luminosity occurs within a...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17827730
hep-lat/9808049
1998-08-28
Universality of the gauge-ball spectrum of the four-dimensional pure U(1) gauge theory
We continue numerical studies of the spectrum of the pure U(1) lattice gauge theory in the confinement phase, initiated in our previous work. Using the extended Wilson action $ S = -\sum_P [\beta \cos(\Theta_P) + \gamma \cos(2\Theta_P)] $ we address the question of universality of the phase transition line in the ($\be...
[ "hep-lat" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j cox_1", "name": "Jürgen Cox", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j jersak_0", "name": "Jiri Jersak", "publication_history": null, "h_index": null, "num_papers": null, "num_ci...
null
15763225
math/9808120
1998-08-28
Word hyperbolic Dehn surgery
The aim of this paper is to demonstrate that very many Dehn fillings on a cusped hyperbolic 3-manifold yield a 3-manifold which is irreducible, atoroidal and not Seifert fibred, and which has infinite, word hyperbolic fundamental group. We establish an extension of the Thurston-Gromov $2\pi$ theorem by showing that if ...
[ "math.GT", "math.GR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
2113300
hep-ph/9808453
1998-08-28
CP violation
The salient features of CP-violating interactions in the standard electroweak theory and in a few of its popular extensions are discussed. Moreover a brief overview is given on the status and prospects of searches for CP non-conservation effects in low and high energy experiments.
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
2097522
math-ph/9808016
1998-08-30
Monotone Riemannian Metrics and Relative Entropy on Non-Commutative Probability Spaces
We use the relative modular operator to define a generalized relative entropy for any convex operator function g on the positive real line satisfying g(1) = 0. We show that these convex operator functions can be partitioned into convex subsets each of which defines a unique symmetrized relative entropy, a unique family...
[ "math-ph", "math.MP", "math.OA", "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15063112
hep-ph/9808485
1998-08-31
Long baseline neutrino oscillation disappearance search using a $\nu$ beam from muon decays
We study the feasibility of performing a $\nu_\mu$ disappearance long-baseline experiment using a neutrino beam coming from muon decays. The advantage of such a technique with respect to the production of neutrino beams from pions is that in a muon decay both muon and electron neutrinos are produced in the same quantit...
[ "hep-ph" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "a bueno_1", "name": "Antonio Bueno", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m campanelli_3", "name": "Mario Campanelli", "publication_history": null, "h_index": null, "num_papers": nul...
null
18641356
cond-mat/9808349
1998-08-31
Avoided Critical Behavior in O(n) Systems
Long-range frustrating interactions, even if their strength is infinitesimal, can give rise to a dramatic proliferations of ground or near-ground states. As a consequence, the ordering temperature can exhibit a discontinuous drop as a function of the frustration. A simple model of the doped Mott insulator, where the sh...
[ "cond-mat.stat-mech", "cond-mat.soft" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "z nussinov_1", "name": "Zohar Nussinov", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j rudnick_0", "name": "Joseph Rudnick", "publication_history": null, "h_index": null, "num_papers": null...
null
119393167
quant-ph/9808065
1998-08-31
Quantum repeaters based on entanglement purification
We study the use of entanglement purification for quantum communication over long distances. For distances much longer than the coherence length of a corresponding noisy quantum channel, the fidelity of transmission is usually so low that standard purification methods are not applicable. It is however possible to divid...
[ "quant-ph" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "w dür_1", "name": "Wolfgang Dür", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "h briegel_1", "name": "Hans [\"J.\"] Briegel", "publication_history": null, "h_index": null, "num_papers": null...
null
117956900
astro-ph/9809011
1998-09-02
Correlation between the gamma-ray and the radio emissions
In this paper, the correlation between the gamma-ray and the radio bands is investigated. The results show that there is a closer correlation between the gamma-ray emission and the high frequency (1.3mm, 230GHz) radio emission for maximum data than between the gamma-ray and the lower frequency (5GHz) radio emissions, w...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j fan_61", "name": "J. [\"H.\"] Fan", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "g adam_1", "name": "George [\"K.\"] Adam", "publication_history": null, "h_index": null, "num_papers": null...
null
14882635
cs/9809006
1998-09-02
The Design and Architecture of the Microsoft Cluster Service -- A Practical Approach to High-Availability and Scalability
Microsoft Cluster Service (MSCS) extends the Win-dows NT operating system to support high-availability services. The goal is to offer an execution environment where off-the-shelf server applications can continue to operate, even in the presence of node failures. Later ver-sions of MSCS will provide scalability via a no...
[ "cs.OS", "cs.DC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
118040333
astro-ph/9809021
1998-09-02
Long-term Variation of AGNs
In this paper, we will discuss the long-term variations in the optical and the infrared bands of some AGNs. It is interesting to note that the reported periods of AGNs are of the similar values (about 10 years, see Fan et al. 1998a, ApJ, 507 in press, and references therein). DCF method shows the optical and infrared b...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j fan_61", "name": "J. [\"H.\"] Fan", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "g xie_18", "name": "Guang-zhong Xie", "publication_history": null, "h_index": null, "num_papers": null, ...
null
822
cs/9809008
1998-09-02
Comparing the expressive power of the Synchronous and the Asynchronous pi-calculus
The Asynchronous pi-calculus, as recently proposed by Boudol and, independently, by Honda and Tokoro, is a subset of the pi-calculus which contains no explicit operators for choice and output-prefixing. The communication mechanism of this calculus, however, is powerful enough to simulate output-prefixing, as shown by B...
[ "cs.PL" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "c palamidessi_1", "name": "Catuscia Palamidessi", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
17242579
hep-ph/9809252
1998-09-03
A medium baseline search for $\nu_\mu\to\nu_e$ oscillations at a $\nu$ beam from muon decays
The accurate knowledge of the $\bar\nu_e (\nu_\mu)$ beam produced in $\mu^-$ decays and the absence of $\nu_e (\bar\nu_\mu)$ contamination, make a future muon storage ring the ideal place to look for $\numunue$ ($\numubarnuebar$) oscillations. Using a detector capable of electron and muon identification with charge dis...
[ "hep-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a bueno_1", "name": "Antonio Bueno", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m campanelli_3", "name": "Mario Campanelli", "publication_history": null, "h_index": null, "num_papers": nul...
null
118835934
cond-mat/9809090
1998-09-04
Eigenvector statistics in non-Hermitian random matrix ensembles
We study statistical properties of the eigenvectors of non-Hermitian random matrices, concentrating on Ginibre's complex Gaussian ensemble, in which the real and imaginary parts of each element of an N x N matrix, J, are independent random variables. Calculating ensemble averages based on the quantity $< L_\alpha | L_\...
[ "cond-mat.dis-nn" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17932350
astro-ph/9809058
1998-09-04
Radiative Transfer in a Clumpy Universe: III. The Nature of Cosmological Ionizing Sources
The history of the transition from a neutral intergalactic medium (IGM) to one that is almost fully ionized can reveal the character of cosmological ionizing sources. We study the evolution of the volume filling factor of HII and HeIII regions in a clumpy IGM, and discuss the implications for rival reionization scenari...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119408405
cond-mat/9809091
1998-09-04
Interacting hard-core bosons and surface preroughening
The theory of the preroughening transition of an unreconstructed surface, and the ensuing disordered flat (DOF) phase, is formulated in terms of interacting steps. Finite terraces play a crucial role in the formulation. We start by mapping the statistical mechanics of interacting (up and down) steps onto the quantum me...
[ "cond-mat" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a laio_1", "name": "Alessandro Laio", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "g santoro_2", "name": "Giuseppe [\"E.\"] Santoro", "publication_history": null, "h_index": null, "num_paper...
null
17576859
astro-ph/9809050
1998-09-04
Historic Light Curve and Long-term Optical Variation of BL Lacertae 2200+420
In this paper, historical optical(UBVRI) data and newly observed data from the Yunnan Observatory of China(about100 years) are presented for BL Lacertae. Maximum variations in UBVRI: 5.12, 5.31, 4.73, 2.59, and 2.54 and color indices of U-B = -0.11 +/- 0.20, B-V= 1.0 +/- 0.11, V-R= 0.73 +/- 0.19, V-I= 1.42 +/- 0.25, R-...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j fan_61", "name": "Jun-Hui Fan", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "g xie_18", "name": "Guang-zhong Xie", "publication_history": null, "h_index": null, "num_papers": null, "nu...
null
52248028
cond-mat/9809105
1998-09-07
Relaxation of classical many-body hamiltonians in one dimension
The relaxation of Fourier modes of hamiltonian chains close to equilibrium is studied in the framework of a simple mode-coupling theory. Explicit estimates of the dependence of relevant time scales on the energy density (or temperature) and on the wavenumber of the initial excitation are given. They are in agreement wi...
[ "cond-mat.stat-mech", "chao-dyn", "nlin.CD" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s lepri_2", "name": "Stefano Lepri", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
7104167
quant-ph/9809016
1998-09-08
An Introduction to Quantum Computing for Non-Physicists
Richard Feynman's observation that quantum mechanical effects could not be simulated efficiently on a computer led to speculation that computation in general could be done more efficiently if it used quantum effects. This speculation appeared justified when Peter Shor described a polynomial time quantum algorithm for f...
[ "quant-ph", "cs.GL" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7746020
cond-mat/9809127
1998-09-08
Strengthened Lindblad inequality: applications in non equilibrium thermodynamics and quantum information theory
A strengthened Lindblad inequality has been proved. We have applied this result for proving a generalized $H$-theorem in non equilibrium thermodynamics. Information processing also can be considered as some thermodynamic process. From this point of view we have proved a strengthened data processing inequality in quantu...
[ "cond-mat.stat-mech" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "d saakian_1", "name": "David [\"B.\"] Saakian", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a allahverdyan_1", "name": "Armen [\"E.\"] Allahverdyan", "publication_history": null, "h_index": nul...
null
3265455
cs/9809012
1998-09-08
A Fully Polynomial Randomized Approximation Scheme for the All Terminal Network Reliability Problem
The classic all-terminal network reliability problem posits a graph, each of whose edges fails independently with some given probability.
[ "cs.DS" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
2479136
cs/9809013
1998-09-09
Reasoning about Noisy Sensors and Effectors in the Situation Calculus
Agents interacting with an incompletely known world need to be able to reason about the effects of their actions, and to gain further information about that world they need to use sensors of some sort. Unfortunately, both the effects of actions and the information returned from sensors are subject to error. To cope wit...
[ "cs.AI", "cs.LO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15582148
hep-th/9809075
1998-09-10
Newtonian versus black-hole scattering
We discuss non-relativistic scattering by a Newtonian potential. We show that the gray-body factors associated with scattering by a black hole exhibit the same functional dependence as scattering amplitudes in the Newtonian limit, which should be the weak-field limit of any quantum theory of gravity. This behavior aris...
[ "hep-th" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "g siopsis_1", "name": "George Siopsis", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null } ]
null
5948453
cs/9809017
1998-09-11
The Complexity of Planar Counting Problems
We prove the #P-hardness of the counting problems associated with various satisfiability, graph and combinatorial problems, when restricted to planar instances. These problems include \begin{romannum} \item[{}] {\sc 3Sat, 1-3Sat, 1-Ex3Sat, Minimum Vertex Cover, Minimum Dominating Set, Minimum Feedback Vertex Set, X3C, ...
[ "cs.CC", "cs.DM" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "h hunt_1", "name": "Harry [\"B.\"] Hunt", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m marathe_1", "name": "Madhav [\"V.\"] Marathe", "publication_history": null, "h_index": null, "num_pap...
null
119482924
quant-ph/9809034
1998-09-11
Pulsed energy-time entangled twin-photon source for quantum communication
A pulsed source of energy-time entangled photon pairs pumped by a standard laser diode is proposed and demonstrated. The basic states can be distinguished by their time of arrival. This greatly simplifies the realization of 2-photon quantum cryptography, Bell state analyzers, quantum teleportation, dense coding, entang...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
791073
cond-mat/9809170
1998-09-11
Spin-glass model with partially annealed asymmetric bonds
We have considered the two-spin interaction spherical spin-glass model with asymmetric bonds (coupling constants). Besides the usual interactions between spins and bonds and between the spins and a thermostat with temperature $T_{\sigma}$ there is also an additional factor: the bonds are not assumed random {\it a prior...
[ "cond-mat.dis-nn" ]
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
17636817
astro-ph/9809168
1998-09-14
Clustering of Galaxies in a Hierarchical Universe: II. Evolution to High Redshift
In hierarchical cosmologies the evolution of galaxy clustering depends both on cosmological quantities such as Omega and Lambda, which determine how dark matter halos form and evolve, and on the physical processes - cooling, star formation and feedback - which drive the formation of galaxies within these merging halos....
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18193430
cond-mat/9809190
1998-09-14
The Nishimori line and Bayesian Statistics
``Nishimori line'' is a line or hypersurface in the parameter space of systems with quenched disorder, where simple expressions of the averages of physical quantities over the quenched random variables are obtained. It has been playing an important role in the theoretical studies of the random frustrated systems since ...
[ "cond-mat.dis-nn", "cond-mat.stat-mech" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119408552
quant-ph/9809043
1998-09-16
Lower Bounds for Attainable Fidelity in Entanglement Purification
We derive lower bounds for the attainable fidelity of standard entanglement purification protocols when local operations and measurements are subjected to errors. We introduce an error parameter which measures the distance between the ideal completely positive map describing a purification step and the one in the prese...
[ "quant-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "g giedke_1", "name": "Géza Giedke", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "h briegel_1", "name": "Hans [\"J.\"] Briegel", "publication_history": null, "h_index": null, "num_papers": nu...
null
14981298
gr-qc/9809049
1998-09-17
Symmetric teleparallel general relativity
General relativity can be presented in terms of other geometries besides Riemannian. In particular, teleparallel geometry (i.e., curvature vanishes) has some advantages, especially concerning energy-momentum localization and its ``translational gauge theory'' nature. The standard version is metric compatible, with tors...
[ "gr-qc" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18424365
astro-ph/9809230
1998-09-17
Application of SFD Dust Maps to Galaxy Counts and CMB Experiments
We have constructed a full-sky map of the far-infrared suitable for measuring Galactic reddening and extinction (Schlegel, Finkbeiner & Davis 1998: SFD). The SFD map is based upon extensive re-analysis of data from the COBE/DIRBE and IRAS satellite missions. We demonstrate that the maps can correct for extinction probl...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "d schlegel_2", "name": "David [\"J.\"] Schlegel", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d finkbeiner_1", "name": "Douglas [\"P.\"] Finkbeiner", "publication_history": null, "h_index": nul...
null
53454093
quant-ph/9809052
1998-09-17
Phase-space formulation of quantum mechanics and quantum state reconstruction for physical systems with Lie-group symmetries
We present a detailed discussion of a general theory of phase-space distributions, introduced recently by the authors [J. Phys. A {\bf 31}, L9 (1998)]. This theory provides a unified phase-space formulation of quantum mechanics for physical systems possessing Lie-group symmetries. The concept of generalized coherent st...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8365573
cs/9809033
1998-09-18
Efficient Retrieval of Similar Time Sequences Using DFT
We propose an improvement of the known DFT-based indexing technique for fast retrieval of similar time sequences. We use the last few Fourier coefficients in the distance computation without storing them in the index since every coefficient at the end is the complex conjugate of a coefficient at the beginning and as st...
[ "cs.DB" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
353601
cs/9809032
1998-09-18
Stable models and an alternative logic programming paradigm
In this paper we reexamine the place and role of stable model semantics in logic programming and contrast it with a least Herbrand model approach to Horn programs. We demonstrate that inherent features of stable model semantics naturally lead to a logic programming system that offers an interesting alternative to more ...
[ "cs.LO", "cs.AI" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15453270
math/9809123
1998-09-22
Fractional Brownian motion and the Markov Property
Fractional Brownian motion belongs to a class of long memory Gaussian processes that can be represented as linear functionals of an infinite dimensional Markov process. This representation leads naturally to: - An efficient algorithm to approximate the process. - An infinite dimensional ergodic theorem which applies to...
[ "math.PR" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
3203950
cs/9809072
1998-09-23
Performance of TCP over ABR on ATM backbone and with various VBR traffic patterns
We extend our earlier studies of buffer requirements of TCP over ABR in two directions. First, we study the performance of TCP over ABR in an ATM backbone. On the backbone, the TCP queues are at the edge router and not inside the ATM network. The router requires buffer equal to the sum of the receiver window sizes of t...
[ "cs.NI" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s kalyanaraman_1", "name": "Shivkumar Kalyanaraman", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r jain_14", "name": "Raj Jain", "publication_history": null, "h_index": null, "num_papers": ...
null
3204235
cs/9809064
1998-09-23
Approximation Algorithms for PSPACE-Hard Hierarchically and Periodically Specified Problems
We study the efficient approximability of basic graph and logic problems in the literature when instances are specified hierarchically as in \cite{Le89} or are specified by 1-dimensional finite narrow periodic specifications as in \cite{Wa93}. We show that, for most of the problems $\Pi$ considered when specified using...
[ "cs.CC", "cs.DS" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m marathe_1", "name": "Madhav [\"V.\"] Marathe", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "h hunt_1", "name": "Harry [\"B.\"] Hunt", "publication_history": null, "h_index": null, "num_pap...
null
887656
hep-th/9809171
1998-09-23
New supersymmetry algebras from partial supersymmetry breaking
In this talk we will study the partial breaking of supersymmetry in flat and anti de Sitter space. We will see that partial breaking in flat space can be accomplished using either of two representations for the massive N=1 spin-3/2 multiplet. We will "unHiggs" each representation and find a new N=2 supergravity and a n...
[ "hep-th" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j bagger_1", "name": "Jonathan [\"A.\"] Bagger", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r altendorfer_1", "name": "Richard Altendorfer", "publication_history": null, "h_index": null, "...
null
117723495
cond-mat/9809314
1998-09-23
Analytic Scaling Functions Applicable to Dispersion Measurements
Scaling functions, $F_+(\omega/\omega_c^+)$ and $F_-(\omega/\omega_c^-)$ for $\phi >\phi_c$ and $\phi <\phi_c$, respectively, are derived from an equation for the complex conductivity of binary conductor-insulator composites. It is shown that the real and imaginary parts of $F_{\pm}$ display most properties required fo...
[ "cond-mat" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "d mclachlan_0", "name": "David S. McLachlan", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "w heiss_1", "name": "W-D Heiss", "publication_history": null, "h_index": null, "num_papers": null, ...
null
1305
cs/9809069
1998-09-23
Design Considerations for the Virtual Source/Virtual Destination (VS/VD) Feature in the ABR Service of ATM Networks
The Available Bit Rate (ABR) service in ATM networks has been specified to allow fair and efficient support of data applications over ATM utilizing capacity left over after servicing higher priority classes. One of the architectural features in the ABR specification [tm4] is the Virtual Source/Virtual Destination (VS/V...
[ "cs.NI" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s kalyanaraman_1", "name": "Shivkumar Kalyanaraman", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r jain_14", "name": "Raj Jain", "publication_history": null, "h_index": null, "num_papers": ...
null
14388437
cond-mat/9809310
1998-09-23
Persistence exponent in a superantiferromagnetic quenching
We measure the persistence exponent in a phase separating two-dimensional spin system with non-conserved dynamics quenched in a region with four coexisting stripe phases. The system is an Ising model with nearest neighbor, next-to-the-nearest neighbor and plaquette interactions. Due the particular nature of the ground ...
[ "cond-mat.stat-mech" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "e cirillo_1", "name": "Emilio [\"N.\",\"M.\"] Cirillo", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "g gonnella_1", "name": "Giuseppe Gonnella", "publication_history": null, "h_index": null, ...
null
3123967
cs/9809105
1998-09-24
Hyper-Systolic Matrix Multiplication
A novel parallel algorithm for matrix multiplication is presented. The hyper-systolic algorithm makes use of a one-dimensional processor abstraction. The procedure can be implemented on all types of parallel systems. It can handle matrix-vector multiplications as well as transposed matrix products.
[ "cs.MS" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "t lippert_1", "name": "Thomas Lippert", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "n petkov_1", "name": "Nicolai Petkov", "publication_history": null, "h_index": null, "num_papers": null, ...
null
2932096
cs/9809103
1998-09-24
Bicriteria Network Design Problems
We study a general class of bicriteria network design problems. A generic problem in this class is as follows: Given an undirected graph and two minimization objectives (under different cost functions), with a budget specified on the first, find a <subgraph \from a given subgraph-class that minimizes the second objecti...
[ "cs.CC", "cs.DS" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m marathe_1", "name": "Madhav [\"V.\"] Marathe", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r ravi_1", "name": "Ramamoorthi Ravi", "publication_history": null, "h_index": null, "num_papers...
null
4013391
hep-ph/9809521
1998-09-24
Lorentz-Violating Extension of the Standard Model
In the context of conventional quantum field theory, we present a general Lorentz-violating extension of the minimal SU(3) x SU(2) x U(1) standard model including CPT-even and CPT-odd terms. It can be viewed as the low-energy limit of a physically relevant fundamental theory with Lorentz-covariant dynamics in which spo...
[ "hep-ph", "astro-ph", "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
291029
astro-ph/9809315
1998-09-24
Long-Term Stability of Planets in Binary Systems
A simple question of celestial mechanics is investigated: in what regions of phase space near a binary system can planets persist for long times? The planets are taken to be test particles moving in the field of an eccentric binary system. A range of values of the binary eccentricity and mass ratio is studied, and both...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
182728
cs/9809081
1998-09-24
Optimal Point Placement for Mesh Smoothing
We study the problem of moving a vertex in an unstructured mesh of triangular, quadrilateral, or tetrahedral elements to optimize the shapes of adjacent elements. We show that many such problems can be solved in linear time using generalized linear programming. We also give efficient algorithms for some mesh smoothing ...
[ "cs.CG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16790143
hep-ph/9809527
1998-09-25
A Possible Hidden Symmetry and Geometrical Source of the Phase in the CKM Matrix
Based on the present data, the three CKM angles may construct a spherical surface triangle whose area automatically provides a "holonomy" phase. By assuming this geometrical phase to be that in the CKM matrix determined by an unknown hidden symmetry, we compare the theoretical prediction on $\epsilon$ with data and fin...
[ "hep-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j chen_485", "name": "Jing-Ling Chen", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m ge_9", "name": "Mo-Lin Ge", "publication_history": null, "h_index": null, "num_papers": null, "num_c...
null
11420023
hep-th/9809187
1998-09-25
M-Theory and Topological Strings--I
The $R^2 F^{2g-2}$ terms of Type IIA strings on Calabi-Yau 3-folds, which are given by the corresponding topological string amplitudes (a worldsheet instanton sum for all genera), are shown to have a simple M-theory interpretation. In particular, a Schwinger one-loop computation in M-theory with wrapped M2 branes and K...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15771750
cond-mat/9809360
1998-09-25
The approach to thermal equilibrium in quantized chaotic systems
We consider many-body quantum systems that exhibit quantum chaos, in the sense that the observables of interest act on energy eigenstates like banded random matrices. We study the time-dependent expectation values of these observables, assuming that the system is in a definite (but arbitrary) pure quantum state. We ind...
[ "cond-mat.stat-mech", "chao-dyn", "nlin.CD" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1473
cs/9809110
1998-09-27
Similarity-Based Models of Word Cooccurrence Probabilities
In many applications of natural language processing (NLP) it is necessary to determine the likelihood of a given word combination. For example, a speech recognizer may need to determine which of the two word combinations ``eat a peach'' and ``eat a beach'' is more likely. Statistical NLP methods determine the likelihoo...
[ "cs.CL", "cs.AI", "cs.LG" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "410080", "num_citations": null } ]
[ { "author_id": "i dagan_1", "name": "Ido Dagan", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "l lee_11", "name": "Lillian Lee", "publication_history": null, "h_index": null, "num_papers": null, "num_cit...
null
119093169
cond-mat/9809374
1998-09-28
Effective Hamiltonian, Mori Product and Quantum Dynamics
An appropriate extension of the effective potential theory is presented that permits the approximate calculation of the dynamical correlation functions for quantum systems. These are obtained by evaluating the generating functionals of the Mori products of quantities related to the relaxation functions in the (PQSCHA) ...
[ "cond-mat.stat-mech" ]
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
14090725
quant-ph/9809082
1998-09-28
An improved bound on distillable entanglement
The best bound known on 2-locally distillable entanglement is that of Vedral and Plenio, involving a certain measure of entanglement based on relative entropy. It turns out that a related argument can be used to give an even stronger bound; we give this bound, and examine some of its properties. In particular, and in c...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
11654906
chao-dyn/9810005
1998-09-30
Practical implementation of nonlinear time series methods: The TISEAN package
Nonlinear time series analysis is becoming a more and more reliable tool for the study of complicated dynamics from measurements. The concept of low-dimensional chaos has proven to be fruitful in the understanding of many complex phenomena despite the fact that very few natural systems have actually been found to be lo...
[ "chao-dyn", "nlin.CD" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119096041
astro-ph/9809411
1998-09-30
Short Timescale Variability in the External Shock Model of Gamma Ray Bursts
We have developed a computer model to calculate gamma ray burst (GRB) light curves and efficiencies from the interaction of a single, thin blast wave with clouds in the external medium. Large amplitude, spiky variability occurs when the clouds have radii r << R/Gamma, where R is the mean distance of a cloud from the GR...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119345556
astro-ph/9809412
1998-09-30
Sinking Satellites and the Heating of Galaxy Discs
We have carried out a set of self-consistent N-body simulations to study the interaction between disc galaxies and merging satellites with the aim of determining the disc kinematical changes induced by such events. We explore a region of the parameter space embracing satellites with different masses and internal struct...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7297380
math/9810009
1998-10-02
Biquantization of Lie bialgebras
For any finite-dimensional Lie bialgebra $g$, we construct a bialgebra $A_{u,v}(g)$ over the ring $C[u][[v]]$, which quantizes simultaneously the universal enveloping bialgebra $U({g})$, the bialgebra dual to $U(g^*)$, and the symmetric bialgebra $S(g)$. We call $A_{u,v}(g)$ a biquantization of $S(g)$. We show that the...
[ "math.QA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18456737
astro-ph/9810050
1998-10-03
The eclipsing X-ray pulsar X-7 in M33
Using our extensive ROSAT X-ray observations of M33, we confirm a 3.45 day eclipse period for the Einstein source X-7 (Larson & Schulman, 1997) and discover evidence for a 0.31-s pulse period. The orbital period, pulse period and observed X-ray luminosity are remarkably similar to SMC X-1. We therefore suggest M33 X-7 ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1515588
cs/9810005
1998-10-05
Anytime Coalition Structure Generation with Worst Case Guarantees
Coalition formation is a key topic in multiagent systems. One would prefer a coalition structure that maximizes the sum of the values of the coalitions, but often the number of coalition structures is too large to allow exhaustive search for the optimal one. But then, can the coalition structure found via a partial sea...
[ "cs.MA", "cs.AI" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "t sandholm_1", "name": "Tuomas Sandholm", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "k larson_5", "name": "K. Larson", "publication_history": null, "h_index": null, "num_papers": null, ...
null
119333888
astro-ph/9810070
1998-10-05
Dwarf Galaxies of the Local Group
The Local Group (LG) dwarf galaxies offer a unique window to the detailed properties of the most common type of galaxy in the Universe. In this review, I update the census of LG dwarfs based on the most recent distance and radial velocity determinations. I then discuss the detailed properties of this sample, including ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119364373
astro-ph/9810092
1998-10-06
Measuring Dark Matter Power Spectrum from Cosmic Microwave Background
We propose a method to extract the projected power spectrum of density perturbations from the distortions in the cosmic microwave background (CMB). The distortions are imprinted onto the CMB by the gravitational lensing effect and can be extracted using a combination of products of CMB derivatives. We show that future ...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "u seljak_2", "name": "Uroš Seljak", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m zaldarriaga_1", "name": "Matias Zaldarriaga", "publication_history": null, "h_index": null, "num_papers": n...
null
15936357
cond-mat/9810071
1998-10-07
Crashes as Critical Points
We study a rational expectation model of bubbles and crashes. The model has two components : (1) our key assumption is that a crash may be caused by local self-reinforcing imitation between noise traders. If the tendency for noise traders to imitate their nearest neighbors increases up to a certain point called the ``c...
[ "cond-mat" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
3902229
astro-ph/9810158
1998-10-09
Radio to Gamma-Ray Emission from Shell-type Supernova Remnants: Predictions from Non-linear Shock Acceleration Models
Supernova remnants (SNRs) are widely believed to be the principal source of galactic cosmic rays. Such energetic particles can produce gamma-rays and lower energy photons via interactions with the ambient plasma. In this paper, we present results from a Monte Carlo simulation of non-linear shock structure and accelerat...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8016654
adap-org/9810003
1998-10-12
Optimizing Epochal Evolutionary Search: Population-Size Independent Theory
Epochal dynamics, in which long periods of stasis in population fitness are punctuated by sudden innovations, is a common behavior in both natural and artificial evolutionary processes. We use a recent quantitative mathematical analysis of epochal evolution to estimate, as a function of population size and mutation rat...
[ "adap-org", "nlin.AO", "q-bio.PE" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1991210
hep-ex/9810029
1998-10-12
Measurement of the Top Quark Mass with the Collider Detector at Fermilab
We present a new measurement of the top quark mass in $t\bar t$ events in which both $W$ bosons from top quarks decay into lepton ($e \nu,\mu \nu$). We use events collected by the CDF experiment from $p\bar p$ collisions at \sqrt s=1.8 TeV at the Tevatron collider. We measure a top quark mass of 167.4 \pm 10.3(stat) \p...
[ "hep-ex" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "t affolder_1", "name": "Tony Affolder", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "h akimoto_1", "name": "H. Akimoto", "publication_history": null, "h_index": null, "num_papers": null, ...
null
13173395
cond-mat/9810139
1998-10-13
Discontinuous Crack Fronts of Three-Dimensional Fractures
The relation between fracture surface morphology and the three-dimensional structure of crack fronts is investigated through direct observation of brittle cracks in gels. A key notion in this investigation is the discontinuity of the crack front, whose advancement creates the fracture surface. We discuss the significan...
[ "cond-mat.soft", "cond-mat.mtrl-sci" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
116984409
cond-mat/9810198
1998-10-16
Dynamical regimes in DPD
We discuss theoretically the behavior of the velocity autocorrelation function in the Dissipative Particle Dynamics model. Two dynamical regimes are identified depending on the dimensionless model parameters. For low frictions a mean field behavior is observed in which the kinetic theory for DPD provides good predictio...
[ "cond-mat.stat-mech", "cond-mat.soft" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "p español_1", "name": "Pep Español", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m serrano_2", "name": "Mar Serrano", "publication_history": null, "h_index": null, "num_papers": null, "...
null
13989802
hep-th/9810126
1998-10-16
Novel Local CFT and Exact Results on Perturbations of N=4 Super Yang Mills from AdS Dynamics
We find new, local, non-supersymmetric conformal field theories obtained by relevant deformations of the N=4 super Yang Mills theory in the large $N$ limit. We contruct interpolating supergravity solutions that naturally represent the flow from the N=4 super Yang Mills UV theory to these non-supersymmetric IR fixed poi...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119469016
astro-ph/9810257
1998-10-16
Reconstructing Projected Matter Density from Cosmic Microwave Background
Gravitational lensing distorts the cosmic microwave background (CMB) anisotropies and imprints a characteristic pattern onto it. The distortions depend on the projected matter density between today and redshift $z \sim 1100$. In this paper we develop a method for a direct reconstruction of the projected matter density ...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m zaldarriaga_1", "name": "Matias Zaldarriaga", "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": n...
null
11355968
math/9810105
1998-10-16
On the Distribution of the Length of the Longest Increasing Subsequence of Random Permutations
The authors consider the length, $l_N$, of the length of the longest increasing subsequence of a random permutation of $N$ numbers. The main result in this paper is a proof that the distribution function for $l_N$, suitably centered and scaled, converges to the Tracy-Widom distribution [TW1] of the largest eigenvalue o...
[ "math.CO", "math-ph", "math.MP", "nlin.SI", "solv-int" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
117774954
quant-ph/9810057
1998-10-19
About optimal measurements in quantum hypothesizes testing
We consider the problem of a state determination for a two-level quantum system which can be in one of two nonorthogonal mixed states. It is proved that for the two independent identical systems the optimal combined measurement (which considers the pair as one system) cannot be less optimal than the corresponding seque...
[ "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
16138105
astro-ph/9810324
1998-10-20
Dynamical Friction in a Gaseous Medium
Using time-dependent linear perturbation theory, we evaluate the dynamical friction force on a massive perturber M_p traveling at velocity V through a uniform gaseous medium of density rho_0 and sound speed c_s. This drag force acts in the direction -\hat V, and arises from the gravitational attraction between the pert...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
55764795
cond-mat/9810262
1998-10-20
Dynamic Fracture in Single Crystal Silicon
We have measured the velocity of a running crack in brittle single crystal silicon as a function of energy flow to the crack tip. The experiments are designed to permit direct comparison with molecular dynamics simulations; therefore the experiments provide an indirect but sensitive test of interatomic potentials. Perf...
[ "cond-mat.mtrl-sci" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8643820
hep-th/9810151
1998-10-20
The Graviton in the AdS-CFT correspondence: Solution via the Dirichlet Boundary value problem
Using the AdS-CFT correspondence we calculate the two point function of CFT energy momentum tensors. The AdS gravitons are considered by explicitly solving the Dirichlet boundary value problem for $x_0=\epsilon$. We consider this treatment as complementary to existing work, with which we make contact.
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119386128
astro-ph/9810329
1998-10-21
A Model of the Double Magnetic Cycle of the Sun
It has been argued that the solar magnetic cycle consists of two main periodic components: a low-frequency component (Hale's 22-year cycle) and a high-frequency component (quasi-biennial cycle). The existence of the double magnetic cycle on the Sun is confirmed using Stanford, Mount Wilson and Kitt Peak magnetograph da...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119034429
astro-ph/9810354
1998-10-22
Long-Term Scintillation Studies of Pulsars: I. Observations and Basic Results
We report long-term scintillation observations of 18 pulsars in the DM range 3-35 pc cm^{-3} carried out during 1993-1995 using the Ooty Radio Telescope at 327 MHz. These observations were made with the aim of studying refractive effects in pulsar scintillation, and obtaining reliable estimates of diffractive and refra...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
4347589
astro-ph/9810359
1998-10-22
The Imprint of Galaxy Formation on X-ray Clusters
It is widely believed that structure in the Universe evolves hierarchically, as primordial density fluctuations, amplified by gravity, collapse and merge to form progressively larger systems. The structure and evolution of X-ray clusters, however, seems at odds with this hierarchical scenario for structure formation. P...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7394323
astro-ph/9810373
1998-10-22
Calibrator Design for the COBE Far Infrared Absolute Spectrophotometer (FIRAS)
The photometric errors of the external calibrator for the FIRAS instrument on the COBE are smaller than the measurement errors on the cosmic microwave background (CMBR) spectrum (typically 0.02 MJy/sr, 1 sigma), and smaller than 0.01% of the peak brightness of the CMBR. The calibrator is a re-entrant cone, shaped like ...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14409550
astro-ph/9810403
1998-10-25
Gravitational Lensing of Distant Supernovae in Cold Dark Matter Universes
Ongoing searches for supernovae (SNe) at cosmological distances have recently started to provide large numbers of events with measured redshifts and apparent brightnesses. Compared to quasars or galaxies, Type Ia SNe represent a population of sources with well-known intrinsic properties, and could be used to detect gra...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
921320
quant-ph/9810082
1998-10-27
Quantum computation over continuous variables
This paper provides necessary and sufficient conditions for constructing a universal quantum computer over continuous variables. As an example, it is shown how a universal quantum computer for the amplitudes of the electromagnetic field might be constructed using simple linear devices such as beam-splitters and phase s...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17315216
hep-ex/9810046
1998-10-28
Measurement of Three-jet Distributions in Photoproduction at HERA
The cross section for the photoproduction of events containing three jets with a three-jet invariant mass of M_3J > 50 GeV has been measured with the ZEUS detector at HERA. The three-jet angular distributions are inconsistent with a uniform population of the available phase space but are well described by parton shower...
[ "hep-ex" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j breitweg_1", "name": "J. Breitweg", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s chekanov_1", "name": "Sergei [\"V.\"] Chekanov", "publication_history": null, "h_index": null, "num_paper...
null
26231599
quant-ph/9810087
1998-10-28
Entanglement of atoms via cold controlled collisions
We show that by using cold controlled collisions between two atoms one can achieve conditional dynamics in moving trap potentials. We discuss implementing two qubit quantum--gates and efficient creation of highly entangled states of many atoms in optical lattices.
[ "quant-ph", "cond-mat" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "d jaksch_1", "name": "Dieter Jaksch", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "h briegel_1", "name": "Hans [\"J.\"] Briegel", "publication_history": null, "h_index": null, "num_papers": ...
null
119341077
quant-ph/9810094
1998-10-30
Spatial fragmentation of a Bose-Einstein condensate in a double-well potential
We present a theoretical study of the ground state of a Bose-Einstein condensate with repulsive inter-particle interactions in a double-well potential, using a restricted variational principle. Within such an approach, there is a transition from a single condensate to a fragmented condensate as the strength of the cent...
[ "quant-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "r spekkens_1", "name": "Robert [\"W.\"] Spekkens", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j sipe_1", "name": "John [\"E.\"] Sipe", "publication_history": null, "h_index": null, "num_pa...
null
8045786
q-bio/0309031
1998-10-30
Metric-space analysis of spike trains: theory, algorithms, and application
We present the mathematical basis of a new approach to the analysis of temporal coding. The foundation of the approach is the construction of several families of novel distances (metrics) between neuronal impulse trains. In contrast to most previous approaches to the analysis of temporal coding, the present approach do...
[ "q-bio.NC", "q-bio.QM" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15655631
chao-dyn/9811001
1998-10-30
Entropy Production in Non-Linear, Thermally Driven Hamiltonian Systems
We consider a finite chain of non-linear oscillators coupled at its ends to two infinite heat baths which are at different temperatures. Using our earlier results about the existence of a stationary state, we show rigorously that for arbitrary temperature differences and arbitrary couplings, such a system has a unique ...
[ "chao-dyn", "nlin.CD" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "11226039", "num_citations": null } ]
[ { "author_id": "j eckmann_1", "name": "Jean-Pierre Eckmann", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "c pillet_1", "name": "Claude-Alain Pillet", "publication_history": null, "h_index": null, "num_paper...
null
96830219
cond-mat/9810403
1998-10-30
Dynamic Density Functional Theory of Fluids
We present a new time-dependent Density Functional approach to study the relaxational dynamics of an assembly of interacting particles subject to thermal noise. Starting from the Langevin stochastic equations of motion for the velocities of the particles we are able by means of an approximated closure to derive a self-...
[ "cond-mat.stat-mech" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
17671815
hep-ex/9811001
1998-10-31
The SELEX Phototube RICH Detector
In this article, construction, operation, and performance of the RICH detector of Fermilab experiment 781 (SELEX) are described. The detector utilizes a matrix of 2848 phototubes for the photocathode to detect Cherenkov photons generated in a 10m Neon radiator. For the central region an N0 of 104/cm, corresponding to 1...
[ "hep-ex", "physics.ins-det" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
5993431
math/9811028
1998-11-05
Virtual Knot Theory
Virtual knot theory is a generalization (discovered by the author in 1996) of knot theory to the study of all oriented Gauss codes. (Classical knot theory is a study of planar Gauss codes.) Graph theory studies non-planar graphs via graphical diagrams with virtual crossings. Virtual knot theory studies non-planar Gauss...
[ "math.GT", "math.QA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1344727
quant-ph/9811020
1998-11-08
Complete quantum teleportation using nuclear magnetic resonance
Quantum mechanics provides spectacular new information processing abilities (Bennett 1995, Preskill 1998). One of the most unexpected is a procedure called quantum teleportation (Bennett et al 1993) that allows the quantum state of a system to be transported from one location to another, without moving through the inte...
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16454551
cs/9811013
1998-11-08
The Asilomar Report on Database Research
The database research community is rightly proud of success in basic research, and its remarkable record of technology transfer. Now the field needs to radically broaden its research focus to attack the issues of capturing, storing, analyzing, and presenting the vast array of online data. The database research communit...
[ "cs.DB", "cs.DL" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "p bernstein_1", "name": "Philip [\"A.\"] Bernstein", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m brodie_0", "name": "Michael [\"L.\"] Brodie", "publication_history": null, "h_index": null, ...
null
28241117
astro-ph/9811123
1998-11-08
Direct Signature of Evolving Gravitational Potential from Cosmic Microwave Background
We show that time dependent gravitational potential can be directly detected from the cosmic microwave background (CMB) anisotropies. The signature can be measured by cross-correlating the CMB with the projected density field reconstructed from the weak lensing distortions of the CMB itself. The cross-correlation gives...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "u seljak_2", "name": "Uroš Seljak", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m zaldarriaga_1", "name": "Matias Zaldarriaga", "publication_history": null, "h_index": null, "num_papers": n...
null
14655940
astro-ph/9811128
1998-11-09
Gigahertz Peaked Spectrum sources from the Jodrell Bank-VLA Astrometric Survey
Observations with MERLIN at 408 MHz have been used to establish the low-frequency part of the spectra of more than a hundred compact radio sources taken from the part of the Jodrell Bank--VLA Astrometric Survey limited by 35 deg. < \delta < 75 deg. These sources were selected from JVAS and other catalogues to have conv...
[ "astro-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a marecki_0", "name": "Andrzej Marecki", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "h falcke_1", "name": "Heino Falcke", "publication_history": null, "h_index": null, "num_papers": null, ...
null
14872161
math/9811071
1998-11-11
An overview of the Kepler conjecture
This is the first in a series of papers giving a proof of the Kepler conjecture, which asserts that the density of a packing of congruent spheres in three dimensions is never greater than $\pi/\sqrt{18}\approx 0.74048...$. This is the oldest problem in discrete geometry and is an important part of Hilbert's 18th proble...
[ "math.MG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
11775633
math/9811073
1998-11-11
Sphere packings I
We describe a program to prove the Kepler conjecture on sphere packings. We then carry out the first step of this program. Each packing determines a decomposition of space into Delaunay simplices, which are grouped together into finite configurations called Delaunay stars. A score, which is related to the density of pa...
[ "math.MG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119493802
cond-mat/9811159
1998-11-11
Damage spreading and Lyapunov exponents in cellular automata
Using the concept of the Boolean derivative we study damage spreading for one dimensional elementary cellular automata and define their maximal Lyapunov exponent. A random matrix approximation describes quite well the behavior of ``chaotic'' rules and predicts a directed percolation-type phase transition. After the int...
[ "cond-mat.stat-mech" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
27441067
quant-ph/9811026
1998-11-12
Quantum limit of decoherence: Environment induced superselection of energy eigenstates
We investigate decoherence in the limit where the interaction with the environment is weak and the evolution is dominated by the self Hamiltonian of the system. We show that in this case quantized eigenstates of energy emerge as pointer states selected through the predictability sieve.
[ "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15705968
astro-ph/9811189
1998-11-12
Bayesian photometric redshift estimation
Photometric redshift estimation is becoming an increasingly important technique, although the currently existing methods present several shortcomings which hinder their application. Here it is shown that most of those drawbacks are efficiently eliminated when Bayesian probability is consistently applied to this problem...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14236400
cond-mat/9811170
1998-11-12
The Density Matrix Renormalization Group, Quantum Groups and Conformal Field Theory
We present an overview of the Density Matrix Renormalization Group and its connections to Quantum Groups, Matrix Products and Conformal Field Theory. We emphasize some common formal structures in all these theories. We also propose two-dimensional extensions of the variational matrix product ansatzs.
[ "cond-mat.str-el" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
42516312
cs/9811023
1998-11-12
Complexity limitations on quantum computation
We use the powerful tools of counting complexity and generic oracles to help understand the limitations of the complexity of quantum computation. We show several results for the probabilistic quantum class BQP. 1. BQP is low for PP, i.e., PP^BQP=PP. 2. There exists a relativized world where P=BQP and the polynomial-tim...
[ "cs.CC", "quant-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
3264519
cs/9811025
1998-11-13
A Structured Language Model
The paper presents a language model that develops syntactic structure and uses it to extract meaningful information from the word history, thus enabling the use of long distance dependencies. The model assigns probability to every joint sequence of words - binary-parse-structure with headword annotation. The model, its...
[ "cs.CL" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
59500284
astro-ph/9811219
1998-11-13
Gamma Radiation from PSR B1055-52
The telescopes on the Compton Gamma Ray Observatory (CGRO) have observed PSR B1055-52 a number of times between 1991 and 1998. From these data, a more detailed picture of the gamma radiation from this source has been developed, showing several characteristics which distinguish this pulsar: the light curve is complex; t...
[ "astro-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null