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 ⌀ |
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3036315 | 0810.0068 | 2008-09-30 | On the Index Coding Problem and its Relation to Network Coding and Matroid Theory | The \emph{index coding} problem has recently attracted a significant attention from the research community due to its theoretical significance and applications in wireless ad-hoc networks. An instance of the index coding problem includes a sender that holds a set of information messages $X=\{x_1,...,x_k\}$ and a set of... | [
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15795422 | 0809.5145 | 2008-09-30 | 3D MIMO Scheme for Broadcasting Future Digital TV in Single Frequency Networks | This letter introduces a 3D space-time-space block code for future digital TV systems. The code is based on a double layer structure for inter-cell and intra-cell transmission mode in single frequency networks. Without increasing the complexity of the receiver, the proposed code is very efficient for different transmis... | [
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"name": "Jean-François Hélard",
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13767201 | 0809.5188 | 2008-09-30 | Analysis and Performance Comparison of DVB-T and DTMB Systems for Terrestrial Digital TV | Orthogonal frequency-division multiplexing (OFDM) is the most popular transmission technology in digital terrestrial broadcasting (DTTB), adopted by many DTTB standards. In this paper, the bit error rate (BER) performance of two DTTB systems, namely cyclic prefix OFDM (CP-OFDM) based DVB-T and time domain synchronous O... | [
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"name": "Matthieu Crussiére",
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118440535 | 0809.5112 | 2008-09-30 | Extended Limber Approximation | We develop a systematic derivation for the Limber approximation to the angular cross-power spectrum of two random fields, as a series expansion in 1/(\ell+1/2). This extended Limber approximation can be used to test the accuracy of the Limber approximation and to improve the rate of convergence at large \ell's. We show... | [
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9319954 | 0809.5189 | 2008-09-30 | A novel channel estimation based on spread pilots for terrestrial digital video broadcasting | In this paper, we propose a novel channel estimation technique based on spread pilots for digital video broadcasting. This technique consists in adding a linear preceding function before the OFDM modulation and dedicating one of the preceding sequence to transmit the pilot symbols for the channel estimation. The merits... | [
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"name": "Matthieu Crussiére",
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14167213 | 0810.0154 | 2008-10-01 | Optimization of sequences in CDMA systems: a statistical-mechanics approach | Statistical mechanics approach is useful not only in analyzing macroscopic system performance of wireless communication systems, but also in discussing design problems of wireless communication systems. In this paper, we discuss a design problem of spreading sequences in code-division multiple-access (CDMA) systems, as... | [
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"name": "Toshiyuki TANAKA",
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118897040 | 0810.0003 | 2008-10-01 | Deconstructing Baryon Acoustic Oscillations: A Comparison of Methods | The Baryon Acoustic Oscillations (BAOs) or baryon wiggles which are present in the galaxy power spectrum at scales 100-150Mpc/h are powerful features with which to constrain cosmology. The potential of these probes is such that these are now included as primary science goals in the planning of several future galaxy sur... | [
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3712334 | 0810.0326 | 2008-10-01 | Collision Resolution by Exploiting Symbol Misalignment | This paper presents CRESM, a novel collision resolution method for decoding collided packets in random-access wireless networks. In a collision, overlapping signals from several sources are received simultaneously at a receiver. CRESM exploits symbol misalignment among the overlapping signals to recover the individual ... | [
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"name": "Soung [\"Chang\"] Liew",
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13990746 | 0810.0145 | 2008-10-01 | Testing the blazar spectral sequence: X-ray selected blazars | We present simultaneous optical and X-ray data from Swift for a sample of FSRQs selected from the EMSS survey. We present also a complete analysis of Swift and INTEGRAL data on 4 blazars recently discussed as possibly challenging the trends of the "blazar spectral sequence". The SEDs of all these objects are modelled i... | [
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14024778 | 0810.0027 | 2008-10-01 | Telescope Optics and Weak Lensing: PSF Patterns due to Low Order Aberrations | In weak lensing investigations, galaxy shapes are deconvolved for the effects of the point spread function (PSF) using stellar images. In this paper we use physical models of the telescope optics to understand the spatial variation of the PSF in the image plane. We introduce a set of parameters to model the key aberrat... | [
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15483579 | 0810.0137 | 2008-10-01 | Specific Angular Momentum of Disc Merger Remnants and the $\lambda_R$-Parameter | We use two-dimensional kinematic maps of simulated binary disc mergers to investigate the $\lambda_R$-parameter, which is a luminosity weighted measure of projected angular momentum per unit mass. This parameter was introduced to subdivide the SAURON sample of early type galaxies in so called fast $\lambda_R > 0.1$ and... | [
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14801066 | 0810.0312 | 2008-10-01 | On the relationship between continuous- and discrete-time quantum walk | Quantum walk is one of the main tools for quantum algorithms. Defined by analogy to classical random walk, a quantum walk is a time-homogeneous quantum process on a graph. Both random and quantum walks can be defined either in continuous or discrete time. But whereas a continuous-time random walk can be obtained as the... | [
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6282288 | 0810.0097 | 2008-10-01 | Concentration inequalities for Markov processes via coupling | We obtain moment and Gaussian bounds for general Lipschitz functions evaluated along the sample path of a Markov chain. We treat Markov chains on general (possibly unbounded) state spaces via a coupling method. If the first moment of the coupling time exists, then we obtain a variance inequality. If a moment of order 1... | [
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12279724 | 0810.0333 | 2008-10-02 | Effect of many-body quantum fluctuations on matrix Berry phases of a two-dimensional n-type semiconductor quantum dot | In the presence of spin-orbit coupling and inversion symmetry of the lateral confinement potential a single electron does not exhibit matrix Berry phases in quasi-two-dimensional semiconductor quantum dots. In such a system we investigate whether many-body correlation effects can lead to finite matrix Berry phases. We ... | [
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197480494 | 0810.0323 | 2008-10-02 | How to measure redshift-space distortions without sample variance | We show how to use multiple tracers of large-scale density with different biases to measure the redshift-space distortion parameter beta=f/b=(dlnD/dlna)/b (where D is the growth rate and a the expansion factor), to a much better precision than one could achieve with a single tracer, to an arbitrary precision in the low... | [
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"name": "Uroš Seljak",
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3151228 | 0810.0462 | 2008-10-02 | Reciprocal locomotion of dense swimmers in Stokes flow | Due to the kinematic reversibility of Stokes flow, a body executing a reciprocal motion (a motion in which the sequence of body configurations remains identical under time reversal) cannot propel itself in a viscous fluid in the limit of negligible inertia; this result is known as Purcell's scallop theorem. In this lim... | [
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15679601 | 0810.0419 | 2008-10-02 | Bound states and magnetic field-induced valley splitting in gate-tunable graphene quantum dots | The magnetic field dependence of energy levels in gapped single- and bilayer graphene quantum dots (QDs) defined by electrostatic gates is studied analytically in terms of the Dirac equation. Due to the absence of sharp edges in these types of QDs, the valley degree of freedom is a good quantum number. We show that its... | [
"cond-mat.mes-hall"
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11701515 | 0810.0503 | 2008-10-02 | On the Capacity of One-sided Two user Gaussian Fading Broadcast Channels | In this paper, we investigate upper and lower bounds on the capacity of two-user fading broadcast channels where one of the users has a constant (non-fading) channel. We use the Costa entropy power inequality (EPI) along with an optimization framework to derive upper bounds on the sum-capacity and superposition coding ... | [
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"name": "Sriram Vishwanath",
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14350588 | 0810.0365 | 2008-10-02 | On o-minimal homotopy groups | We work over an o-minimal expansion of a real closed field. The o-minimal homotopy groups of a definable set are defined naturally using definable continuous maps. We prove that any two semialgebraic maps which are definably homotopic are also semialgebraically homotopic. This result together with the study of semialge... | [
"math.LO"
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26890855 | 0810.0534 | 2008-10-02 | Quantum Illumination with Gaussian States | An optical transmitter irradiates a target region containing a bright thermal-noise bath in which a low-reflectivity object might be embedded. The light received from this region is used to decide whether the object is present or absent. The performance achieved using a coherent-state transmitter is compared with that ... | [
"quant-ph",
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] | null | [
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] | null | null | null |
7353901 | 0810.0747 | 2008-10-03 | A New Upper Bound on the Capacity of a Class of Primitive Relay Channels | We obtain a new upper bound on the capacity of a class of discrete memoryless relay channels. For this class of relay channels, the relay observes an i.i.d. sequence $T$, which is independent of the channel input $X$. The channel is described by a set of probability transition functions $p(y|x,t)$ for all $(x,t,y)\in \... | [
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"name": "Sennur Ulukus",
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"... | null |
41456215 | 0810.0698 | 2008-10-03 | Dynamically Error-Corrected Gates for Universal Quantum Computation | Scalable quantum computation in realistic devices requires that precise control can be implemented efficiently in the presence of decoherence and operational errors. We propose a general constructive procedure for designing robust unitary gates on an open quantum system without encoding or measurement overhead. Our res... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
14774425 | 0810.0557 | 2008-10-03 | Re`class'ification of `quant'ified classical simulated annealing | We discuss a classical reinterpretation of quantum-mechanics-based analysis of classical Markov chains with detailed balance, that is based on the quantum-classical correspondence. The classical reinterpretation is then used to demonstrate that it successfully reproduces a sufficient condition for cooling schedule in c... | [
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{
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}
] | null |
5700247 | 0810.0745 | 2008-10-03 | Stackelberg Contention Games in Multiuser Networks | Interactions among selfish users sharing a common transmission channel can be modeled as a non-cooperative game using the game theory framework. When selfish users choose their transmission probabilities independently without any coordination mechanism, Nash equilibria usually result in a network collapse. We propose a... | [
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46702881 | 0810.0694 | 2008-10-03 | The gluon spin contribution to the proton spin from the double helicity asymmetry in inclusive pi^0 production in polarized p+p collisions at sqrt(s)=200 GeV | The double helicity asymmetry in neutral pion production for p_T = 1 to 12 GeV/c has been measured with the PHENIX experiment in order to access the gluon spin contribution, Delta-G, to the proton spin. Measured asymmetries are consistent with zero, and at a theory scale of \mu^2 = 4 GeV^2 give Delta-G^[0.02,0.3] = 0.1... | [
"hep-ex"
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9744509 | 0810.0764 | 2008-10-04 | A New Method for Constructing Large Size WBE Codes with Low Complexity ML Decoder | In this paper we wish to introduce a method to reconstruct large size Welch Bound Equality (WBE) codes from small size WBE codes. The advantage of these codes is that the implementation of ML decoder for the large size codes is reduced to implementation of ML decoder for the core codes. This leads to a drastic reductio... | [
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13103293 | 0810.0763 | 2008-10-04 | Errorless Codes for Over-loaded CDMA with Active User Detection | In this paper we introduce a new class of codes for over-loaded synchronous wireless CDMA systems which increases the number of users for a fixed number of chips without introducing any errors. In addition these codes support active user detection. We derive an upper bound on the number of users with a fixed spreading ... | [
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6226579 | 0810.0744 | 2008-10-04 | A multi-resolution, non-parametric, Bayesian framework for identification of spatially-varying model parameters | This paper proposes a hierarchical, multi-resolution framework for the identification of model parameters and their spatially variability from noisy measurements of the response or output. Such parameters are frequently encountered in PDE-based models and correspond to quantities such as density or pressure fields, ela... | [
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12608889 | 0810.0812 | 2008-10-05 | A new description of orthogonal bases | We show that an orthogonal basis for a finite-dimensional Hilbert space can be equivalently characterised as a commutative dagger-Frobenius monoid in the category FdHilb, which has finite-dimensional Hilbert spaces as objects and continuous linear maps as morphisms, and tensor product for the monoidal structure. The ba... | [
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17441301 | 0810.0817 | 2008-10-05 | Stochastic Least-Action Principle for the Incompressible Navier-Stokes Equation | We formulate a stochastic least-action principle for solutions of the incompressible Navier-Stokes equation, which formally reduces to Hamilton's principle for the incompressible Euler solutions in the case of zero viscosity. We use this principle to give a new derivation of a stochastic Kelvin Theorem for the Navier-S... | [
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119246502 | 0810.0861 | 2008-10-05 | Complex Energy Spectrum and Time Evolution of QBIC States in a Two-Channel Quantum wire with an Adatom Impurity | We provide detailed analysis of the complex energy eigenvalue spectrum for a two-channel quantum wire with an attached adatom impurity. The study is based on our previous work [Phys. Rev. Lett. 99, 210404 (2007)], in which we presented the quasi-bound states in continuum (or QBIC states). These are resonant states with... | [
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14724841 | 0810.0799 | 2008-10-05 | VERITAS Studies of the Supernova Remnants Cas A and IC 443 | VERITAS observed the supernova remnants Cassiopeia A (Cas A) and IC 443 during 2007, resulting in strong TeV detections of both sources. Cas A is a young remnant, and bright in both the radio and nonthermal X-rays, both tracers of cosmic-ray electrons. IC 443 is a middle-aged composite remnant interacting with a molecu... | [
"astro-ph"
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17526785 | 0810.0896 | 2008-10-06 | HIV with contact-tracing: a case study in Approximate Bayesian Computation | Missing data is a recurrent issue in epidemiology where the infection process may be partially observed. Approximate Bayesian Computation, an alternative to data imputation methods such as Markov Chain Monte Carlo integration, is proposed for making inference in epidemiological models. It is a likelihood-free method th... | [
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7319934 | 0810.0981 | 2008-10-06 | Quantum K-theory of Grassmannians | We show that (equivariant) K-theoretic 3-point Gromov-Witten invariants of genus zero on a Grassmann variety are equal to triple intersections computed in the ordinary (equivariant) K-theory of a two-step flag manifold, thus generalizing an earlier result of Buch, Kresch, and Tamvakis. In the process we show that the G... | [
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14947003 | 0810.0931 | 2008-10-06 | Star Formation in the Rosette Complex | The Rosette Complex in the constellation of Monoceros is a magnificent laboratory for the study of star formation. The region presents an interesting scenario, in which an expanding HII region generated by the large OB association NGC 2244 is interacting with a giant molecular cloud. Inside the cloud a number of stella... | [
"astro-ph"
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687896 | 0810.1105 | 2008-10-06 | Low-Density Parity-Check Codes Which Can Correct Three Errors Under Iterative Decoding | In this paper, we give necessary and sufficient conditions for low-density parity-check (LDPC) codes with column-weight three to correct three errors when decoded using hard-decision message-passing decoding. Additionally, we give necessary and sufficient conditions for column-weight-four codes to correct three errors ... | [
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2117771 | 0810.1261 | 2008-10-07 | Soft Uncoupling of Markov Chains for Permeable Language Distinction: A New Algorithm | Without prior knowledge, distinguishing different languages may be a hard task, especially when their borders are permeable. We develop an extension of spectral clustering -- a powerful unsupervised classification toolbox -- that is shown to resolve accurately the task of soft language distinction. At the heart of our ... | [
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1568225 | 0810.1187 | 2008-10-07 | Interference Alignment for Secrecy | This paper studies the frequency/time selective $K$-user Gaussian interference channel with secrecy constraints. Two distinct models, namely the interference channel with confidential messages and the one with an external eavesdropper, are analyzed. The key difference between the two models is the lack of channel state... | [
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15132666 | 0810.1095 | 2008-10-07 | Mass Supply to Galactic Center due to Nested Bars in the Galaxy | We investigate rapid mass supply process by nested bars in the Galaxy by numerical simulation. We simulate gas flow in the whole galaxy disk with nested bars, which are the outer bar and the inner bar, especially with highly spatial resolution in the galactic central region. We assume two cases of inner bar size which ... | [
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14040774 | 0810.1244 | 2008-10-07 | SDSSJ092712.65+294344.0: NGC 1275 at z=0.7? | SDSSJ092712.65+294344.0 was identified by the SDSS as a quasar, but has the unusual property of having two emission line systems offset by 2650 km/s. One of these contains the usual combination of broad and narrow lines, the other only narrow lines. In the first paper commenting on this system (Komossa et al. 2008), it... | [
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15380364 | 0810.1108 | 2008-10-07 | On the Mathematics of the Law of Mass Action | In 1864,Waage and Guldberg formulated the "law of mass action." Since that time, chemists, chemical engineers, physicists and mathematicians have amassed a great deal of knowledge on the topic. In our view, sufficient understanding has been acquired to warrant a formal mathematical consolidation. A major goal of this c... | [
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1510291 | 0810.1248 | 2008-10-07 | Resource Allocation in Multiple Access Channels | We consider the problem of rate allocation in a Gaussian multiple-access channel, with the goal of maximizing a utility function over transmission rates. In contrast to the literature which focuses on linear utility functions, we study general concave utility functions. We present a gradient projection algorithm for th... | [
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17954072 | 0810.1319 | 2008-10-07 | ARQ-Based Secret Key Sharing | This paper develops a novel framework for sharing secret keys using existing Automatic Repeat reQuest (ARQ) protocols. Our approach exploits the multi-path nature of the wireless environment to hide the key from passive eavesdroppers. The proposed framework does not assume the availability of any prior channel state in... | [
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7449616 | 0810.1253 | 2008-10-07 | Dynamic Rate Allocation in Fading Multiple-access Channels | We consider the problem of rate allocation in a fading Gaussian multiple-access channel (MAC) with fixed transmission powers. Our goal is to maximize a general concave utility function of transmission rates over the throughput capacity region. In contrast to earlier works in this context that propose solutions where a ... | [
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2406697 | 0810.1234 | 2008-10-07 | On Resource Allocation in Fading Multiple Access Channels - An Efficient Approximate Projection Approach | We consider the problem of rate and power allocation in a multiple-access channel. Our objective is to obtain rate and power allocation policies that maximize a general concave utility function of average transmission rates on the information theoretic capacity region of the multiple-access channel. Our policies does n... | [
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14395222 | 0810.1260 | 2008-10-07 | Rate and Power Allocation in Fading Multiple Access Channels | We consider the problem of rate and power allocation in a fading multiple-access channel. Our objective is to obtain rate and power allocation policies that maximize a utility function defined over average transmission rates. In contrast with the literature, which focuses on the linear case, we present results for gene... | [
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16290894 | 0810.1268 | 2008-10-07 | Bi-directional half-duplex protocols with multiple relays | In a bi-directional relay channel, two nodes wish to exchange independent messages over a shared wireless half-duplex channel with the help of relays. Recent work has considered information theoretic limits of the bi-directional relay channel with a single relay. In this work we consider bi-directional relaying with mu... | [
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2940475 | 0810.1267 | 2008-10-07 | Information Theory vs. Queueing Theory for Resource Allocation in Multiple Access Channels | We consider the problem of rate allocation in a fading Gaussian multiple-access channel with fixed transmission powers. The goal is to maximize a general concave utility function of the expected achieved rates of the users. There are different approaches to this problem in the literature. From an information theoretic ... | [
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1061358 | 0810.1381 | 2008-10-08 | Numerical Solution of an Inverse Problem in Size-Structured Population Dynamics | We consider a size-structured model for cell division and address the question of determining the division (birth) rate from the measured stable size distribution of the population. We propose a new regularization technique based on a filtering approach. We prove convergence of the algorithm and validate the theoretica... | [
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... | null |
2874304 | 0810.1430 | 2008-10-08 | Blind Cognitive MAC Protocols | We consider the design of cognitive Medium Access Control (MAC) protocols enabling an unlicensed (secondary) transmitter-receiver pair to communicate over the idle periods of a set of licensed channels, i.e., the primary network. The objective is to maximize data throughput while maintaining the synchronization between... | [
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3612445 | 0810.1355 | 2008-10-08 | Community Structure in Large Networks: Natural Cluster Sizes and the Absence of Large Well-Defined Clusters | A large body of work has been devoted to defining and identifying clusters or communities in social and information networks. We explore from a novel perspective several questions related to identifying meaningful communities in large social and information networks, and we come to several striking conclusions. We empl... | [
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119167477 | 0810.1453 | 2008-10-08 | Search for long-lived particles in ATLAS and CMS | The ATLAS and CMS detectors can be used to search for heavy long-lived particles which might signal physics beyond the Standard Model. Such new states can be distinguished from Standard Model particles by exploiting their unique signatures, ranging from multi-leptons and/or jets pro- duction anywhere within the detecto... | [
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17041783 | 0810.1516 | 2008-10-08 | High-Resolution Timing Observations of Spin-Powered Pulsars with the AGILE Gamma-Ray Telescope | AGILE is a small gamma-ray astronomy satellite mission of the Italian Space Agency dedicated to high-energy astrophysics launched in 2007 April. Its 1 microsecond absolute time tagging capability coupled with a good sensitivity in the 30 MeV-30 GeV range, with simultaneous X-ray monitoring in the 18-60 keV band, makes ... | [
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7222788 | 0810.1351 | 2008-10-08 | Physical Properties of Main-Belt Comet P/2005 U1 (Read) | The main-belt comets occupy dynamically asteroidal orbits in the main asteroid belt. Here we present physical observations of the second-known member of this population, P/2005 U1 (Read), which showed vigorous cometary activity from 2005 October 24 to 2005 December 27. Monte Carlo numerical simulations of P/Read's dust... | [
"astro-ph"
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6096252 | 0810.1499 | 2008-10-08 | Constraint satisfaction problems with isolated solutions are hard | We study the phase diagram and the algorithmic hardness of the random `locked' constraint satisfaction problems, and compare them to the commonly studied 'non-locked' problems like satisfiability of boolean formulas or graph coloring. The special property of the locked problems is that clusters of solutions are isolate... | [
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118482960 | 0810.1522 | 2008-10-08 | The Diversity and Similarity of Simulated Cold Dark Matter Halos | We study the mass, velocity dispersion, and anisotropy profiles of $\Lambda$CDM halos using a suite of N-body simulations of unprecedented numerical resolution (the {\it Aquarius Project}). Our analysis confirms a number of results claimed by earlier work, and clarifies a few issues where conflicting claims may be foun... | [
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] | null | null | null |
3752277 | 0810.1541 | 2008-10-08 | Absolute properties of the low-mass eclipsing binary CM Draconis | Spectroscopic and eclipsing binary systems offer the best means for determining accurate physical properties of stars, including their masses and radii. The data available for low-mass stars have yielded firm evidence that stellar structure models predict smaller radii and higher effective temperatures than observed, b... | [
"astro-ph"
] | null | [
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] | null | null | null |
8493176 | 0810.1490 | 2008-10-08 | The Geometry and Dynamics of Interacting Rigid Bodies and Point Vortices | We derive the equations of motion for a planar rigid body of circular shape moving in a 2D perfect fluid with point vortices using symplectic reduction by stages. After formulating the theory as a mechanical system on a configuration space which is the product of a space of embeddings and the special Euclidian group in... | [
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4422629 | 0810.1471 | 2008-10-08 | The formation and assembly of a typical star-forming galaxy at z~3 | Recent studies of galaxies ~2-3 Gyr after the Big Bang have revealed large, turbulent rotating systems. The existence of well-ordered rotation in galaxies during this peak epoch of cosmic star formation may suggest that gas accretion through cold streams is likely to be the dominant mode by which most star-forming gala... | [
"astro-ph"
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24732553 | 0810.1397 | 2008-10-08 | Is the Scaling of Supersonic Turbulence Universal? | The statistical properties of turbulence are considered to be universal at sufficiently small length scales, i. e., independent of boundary conditions and large-scale forces acting on the fluid. Analyzing data from numerical simulations of supersonic turbulent flow driven by external forcing, we demonstrate that this i... | [
"astro-ph"
] | null | [
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] | null | null | null |
119273143 | 0810.1681 | 2008-10-09 | Structure and Formation of Elliptical and Spheroidal Galaxies | New surface photometry of all known elliptical galaxies in the Virgo cluster is added to published data to derive composite profiles over large dynamic ranges. Sersic functions fit them remarkably well. Effective brightnesses and radii are derived via Sersic fits and by integrating the profiles nonparametrically. We st... | [
"astro-ph"
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] | null | null | null |
2922259 | 0810.1736 | 2008-10-09 | Gaussian Belief Propagation Solver for Systems of Linear Equations | The canonical problem of solving a system of linear equations arises in numerous contexts in information theory, communication theory, and related fields. In this contribution, we develop a solution based upon Gaussian belief propagation (GaBP) that does not involve direct matrix inversion. The iterative nature of our ... | [
"cs.IT",
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14548015 | 0810.1563 | 2008-10-09 | Holographic Superconductors | It has been shown that a gravitational dual to a superconductor can be obtained by coupling anti-de Sitter gravity to a Maxwell field and charged scalar. We review our earlier analysis of this theory and extend it in two directions. First, we consider all values for the charge of the scalar field. Away from the large c... | [
"hep-th"
] | null | [
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] | null | null | null |
47228527 | 0810.1735 | 2008-10-09 | Network Coding in a Multicast Switch | The problem of serving multicast flows in a crossbar switch is considered. Intra-flow linear network coding is shown to achieve a larger rate region than the case without coding. A traffic pattern is presented which is achievable with coding but requires a switch speedup when coding is not allowed. The rate region with... | [
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3159661 | 0810.1808 | 2008-10-09 | A Central Limit Theorem for the SINR at the LMMSE Estimator Output for Large Dimensional Signals | This paper is devoted to the performance study of the Linear Minimum Mean Squared Error estimator for multidimensional signals in the large dimension regime. Such an estimator is frequently encountered in wireless communications and in array processing, and the Signal to Interference and Noise Ratio (SINR) at its outpu... | [
"cs.IT",
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118592477 | 0810.1689 | 2008-10-09 | Experimental demonstration of a mu=-1 metamaterial lens for magnetic resonance imaging | In this work a mu=-1 metamaterial (MM) lens for magnetic resonance imaging (MRI) is demonstrated. MRI uses surface coils to detect the radiofrequency(RF) energy absorbed and emitted by the nuclear spins in the imaged object. The proposed MM lens manipulates the RF field detected by these surface coils, so that the coil... | [
"physics.med-ph"
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119200759 | 0810.1637 | 2008-10-09 | Pulsar Timing for the Fermi Gamma-ray Space Telescope | We describe a comprehensive pulsar monitoring campaign for the Large Area Telescope (LAT) on the {\em Fermi Gamma-ray Space Telescope} (formerly GLAST). The detection and study of pulsars in gamma rays give insights into the populations of neutron stars and supernova rates in the Galaxy, into particle acceleration mech... | [
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13982757 | 0810.1756 | 2008-10-09 | Near-Optimal Radio Use For Wireless Network Synchronization | We consider the model of communication where wireless devices can either switch their radios off to save energy, or switch their radios on and engage in communication. We distill a clean theoretical formulation of this problem of minimizing radio use and present near-optimal solutions. Our base model ignores issues of ... | [
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19885818 | 0810.1664 | 2008-10-09 | Scattering a pulse from a chaotic cavity: Transitioning from algebraic to exponential decay | The ensemble averaged power scattered in and out of lossless chaotic cavities decays as a power law in time for large times. In the case of a pulse with a finite duration, the power scattered from a single realization of a cavity closely tracks the power law ensemble decay initially, but eventually transitions to an ex... | [
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6019616 | 0810.1644 | 2008-10-09 | Some Two-Step Procedures for Variable Selection in High-Dimensional Linear Regression | We study the problem of high-dimensional variable selection via some two-step procedures. First we show that given some good initial estimator which is $\ell_{\infty}$-consistent but not necessarily variable selection consistent, we can apply the nonnegative Garrote, adaptive Lasso or hard-thresholding procedure to obt... | [
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"name": "Xinge [\"Jessie\"] Jeng",
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6339307 | 0810.1980 | 2008-10-10 | Error Exponents of Optimum Decoding for the Interference Channel | Exponential error bounds for the finite-alphabet interference channel (IFC) with two transmitter-receiver pairs, are investigated under the random coding regime. Our focus is on optimum decoding, as opposed to heuristic decoding rules that have been used in previous works, like joint typicality decoding, decoding based... | [
"cs.IT",
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"target.author.publication_history.key_reference"
] | null | null | null |
13893118 | 0810.1975 | 2008-10-10 | Leaf roll-up and aquaplaning in strong winds and floods | Flexible plants, fungi, and sessile animals are thought to reconfigure in the wind and water to reduce the drag forces that act upon them. In strong winds, for example, leaves roll up into cone shapes that reduce flutter and drag when compared to paper cut-outs with similar shapes and flexibility. During flash floods, ... | [
"physics.flu-dyn",
"physics.bio-ph"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "l miller_13",
"name": "Laura [\"A.\"] Miller",
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},
{
"author_id": "g herschlag_1",
"name": "Gregory [\"Joseph\"] Herschlag",
"publication_history": null,
"h_index": null... | null |
8591971 | 0810.1824 | 2008-10-10 | Rough Volterra equations 2: convolutional generalized integrals | We define and solve Volterra equations driven by an irregular signal, by means of a variant of the rough path theory allowing to handle generalized integrals weighted by an exponential coefficient. The results are applied to the fractional Brownian motion with Hurst coefficient greater than 1/3 | [
"math.PR"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
6528410 | 0810.1823 | 2008-10-10 | Split decomposition and graph-labelled trees: characterizations and fully-dynamic algorithms for totally decomposable graphs | In this paper, we revisit the split decomposition of graphs and give new combinatorial and algorithmic results for the class of totally decomposable graphs, also known as the distance hereditary graphs, and for two non-trivial subclasses, namely the cographs and the 3-leaf power graphs. Precisely, we give strutural and... | [
"cs.DM",
"cs.DS"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
16832559 | 0810.1945 | 2008-10-10 | Enhanced empirical data for the fundamental diagram and the flow through bottlenecks | In recent years, several approaches for modelling pedestrian dynamics have been proposed and applied e.g. for design of egress routes. However, so far not much attention has been paid to their 'quantitative' validation. This unsatisfactory situation belongs amongst others on the uncertain and contradictory experimental... | [
"physics.soc-ph",
"physics.data-an"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "a seyfried_1",
"name": "Armin Seyfried",
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"num_papers": null,
"num_citations": null
},
{
"author_id": "m boltes_1",
"name": "Maik Boltes",
"publication_history": null,
"h_index": null,
"num_papers": null,
... | null |
118478598 | 0810.1983 | 2008-10-11 | A no-go theorem for a two-dimensional self-correcting quantum memory based on stabilizer codes | We study properties of stabilizer codes that permit a local description on a regular D-dimensional lattice. Specifically, we assume that the stabilizer group of a code (the gauge group for subsystem codes) can be generated by local Pauli operators such that the support of any generator is bounded by a hypercube of cons... | [
"quant-ph",
"cond-mat.stat-mech",
"cond-mat.str-el"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
17643033 | 0810.2010 | 2008-10-11 | A note on conditional Akaike information for Poisson regression with random effects | A popular model selection approach for generalized linear mixed-effects models is the Akaike information criterion, or AIC. Among others, \cite{vaida05} pointed out the distinction between the marginal and conditional inference depending on the focus of research. The conditional AIC was derived for the linear mixed-eff... | [
"stat.ME"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2308577 | 0810.2133 | 2008-10-12 | Diversity-Multiplexing Tradeoff of the Half-Duplex Relay Channel | We show that the diversity-multiplexing tradeoff of a half-duplex single-relay channel with identically distributed Rayleigh fading channel gains meets the 2 by 1 MISO bound. We generalize the result to the case when there are N non-interfering relays and show that the diversity-multiplexing tradeoff is equal to the N ... | [
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [
{
"corpus_id": "884827",
"num_citations": null
},
{
"corpus_id": "2024271",
"num_citations": null
}
] | [
{
"author_id": "s pawar_1",
"name": "Sameer [\"A.\"] Pawar",
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"num_papers": null,
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},
{
"author_id": "a avestimehr_1",
"name": "Amir [\"Salman\"] Avestimehr",
"publication_history": null,
"h_index": null,
... | null |
119185430 | 0810.2140 | 2008-10-13 | Two New Variable Hot DQ Stars | We have discovered periodic variations in the light curves of two hot DQ stars from the Sloan Digital Sky Survey, SDSS J220029.08-074121.5 and SDSS J234843.30-094245.3. These are the second and third variables detected among the hot DQs and confirm the existence of a new class of variable white dwarf stars. The amplitu... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
10116603 | 0810.1960 | 2008-10-13 | Covariance of cross-correlations: towards efficient measures for large-scale structure | We study the covariance of the cross-power spectrum of different tracers for the large-scale structure. We develop the counts-in-cells framework for the multi-tracer approach, and use this to derive expressions for the full non-Gaussian covariance matrix. We show, that for the usual auto-power statistic, besides the of... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
16807037 | 0810.2207 | 2008-10-13 | On the combinatorial classification of toric log del Pezzo surfaces | Toric log del Pezzo surfaces correspond to convex lattice polygons containing the origin in their interior and having only primitive vertices. An upper bound on the volume and on the number of boundary lattice points of these polygons is derived in terms of the index l. Techniques for classifying these polygons are als... | [
"math.AG",
"math.CO"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [
{
"corpus_id": "17191987",
"num_citations": null
}
] | [
{
"author_id": "a kasprzyk_1",
"name": "A. Kasprzyk",
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},
{
"author_id": "m kreuzer_0",
"name": "Maximilian Kreuzer",
"publication_history": null,
"h_index": null,
"num_papers": nul... | null |
14713585 | 0810.2314 | 2008-10-13 | GRB 080913 at redshift 6.7 | We report on the detection by Swift of GRB 080913, and subsequent optical/near-infrared follow-up observations by GROND which led to the discovery of its optical/NIR afterglow and the recognition of its high-z nature via the detection of a spectral break between the i' and z' bands. Spectroscopy obtained at the ESO-VLT... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
15453729 | 0810.2296 | 2008-10-13 | The Size Distribution of Kuiper belt objects for D> 10 km | We have performed a survey of the Kuiper belt covering ~ 1/3 a square degree of the sky using Suprime-cam on the Subaru telescope, to a limiting magnitude of m(R)~ 26.8 (50% threshold) and have found 36 new KBOs. We have confirmed that the luminosity function of the Kuiper belt must break as previously observed (Bernst... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
62795112 | 0810.2352 | 2008-10-13 | Interference Channels with Correlated Receiver Side Information | The problem of joint source-channel coding in transmitting independent sources over interference channels with correlated receiver side information is studied. When each receiver has side information correlated with its own desired source, it is shown that source-channel code separation is optimal. When each receiver h... | [
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "n liu_6",
"name": "Nan Liu",
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},
{
"author_id": "d gündüz_1",
"name": "Deniz Gündüz",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_cita... | null |
2078489 | 0810.2152 | 2008-10-13 | Stimulus-dependent correlations and population codes | The magnitude of correlations between stimulus-driven responses of pairs of neurons can itself be stimulus-dependent. We examine how this dependence impacts the information carried by neural populations about the stimuli that drive them. Stimulus-dependent changes in correlations can both carry information directly and... | [
"q-bio.NC"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "k josic̀_1",
"name": "Kresimir Josic̀",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "e shea-brown_1",
"name": "Eric Shea-Brown",
"publication_history": null,
"h_index": null,
"num_papers": n... | null |
10092279 | 0810.2311 | 2008-10-13 | Non-Negative Matrix Factorization, Convexity and Isometry | In this paper we explore avenues for improving the reliability of dimensionality reduction methods such as Non-Negative Matrix Factorization (NMF) as interpretive exploratory data analysis tools. We first explore the difficulties of the optimization problem underlying NMF, showing for the first time that non-trivial NM... | [
"cs.AI",
"cs.CV"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "n vasiloglou_1",
"name": "Nikolaos Vasiloglou",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "a gray_2",
"name": "Alexander [\"G.\"] Gray",
"publication_history": null,
"h_index": null,
"num_... | null |
119117012 | 0810.2327 | 2008-10-13 | Distinguishability of quantum states under restricted families of measurements with an application to quantum data hiding | Every sufficiently rich set of measurements on a fixed quantum system defines a statistical norm on the states of that system via the optimal bias that can be achieved in distinguishing the states using measurements from that set (assuming equal priors). The Holevo-Helstrom theorem says that for the set of all measurem... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
2583169 | 0810.2379 | 2008-10-14 | Plain Varieties | Algebraic varieties which are locally isomorphic to open subsets of affine space will be called {\em plain}. Plain varieties are smooth and rational. The converse is true for curves and surfaces, and unknown in general. It is shown that plain varieties are stable under blowup in smooth centers. | [
"math.AG"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "g bodnár_1",
"name": "Gábor Bodnár",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "h hauser_1",
"name": "Herwig Hauser",
"publication_history": null,
"h_index": null,
"num_papers": null,
... | null |
15370057 | 0810.2435 | 2008-10-14 | Quantum boolean functions | In this paper we introduce the study of quantum boolean functions, which are unitary operators f whose square is the identity: f^2 = I. We describe several generalisations of well-known results in the theory of boolean functions, including quantum property testing; a quantum version of the Goldreich-Levin algorithm for... | [
"quant-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
460170 | 0810.2513 | 2008-10-14 | The Impact of Mobility on Gossip Algorithms | The influence of node mobility on the convergence time of averaging gossip algorithms in networks is studied. It is shown that a small number of fully mobile nodes can yield a significant decrease in convergence time. A method is developed for deriving lower bounds on the convergence time by merging nodes according to ... | [
"cs.NI",
"cs.DC",
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history"
] | [
{
"corpus_id": "3199554",
"num_citations": null
},
{
"corpus_id": "1419882",
"num_citations": null
}
] | [
{
"author_id": "a sarwate_1",
"name": "Anand [\"D.\"] Sarwate",
"publication_history": null,
"h_index": null,
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"num_citations": null
},
{
"author_id": "a dimakis_1",
"name": "Alexandros [\"G.\"] Dimakis",
"publication_history": null,
"h_index": null,
... | null |
9520017 | 0810.2529 | 2008-10-14 | On the Throughput Maximization in Dencentralized Wireless Networks | A distributed single-hop wireless network with $K$ links is considered, where the links are partitioned into a fixed number ($M$) of clusters each operating in a subchannel with bandwidth $\frac{W}{M}$. The subchannels are assumed to be orthogonal to each other. A general shadow-fading model, described by parameters $(... | [
"cs.IT",
"math.IT"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "j abouei_1",
"name": "Jamshid Abouei",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "a bayesteh_1",
"name": "Alireza Bayesteh",
"publication_history": null,
"h_index": null,
"num_papers": nul... | null |
17541757 | 0810.2411 | 2008-10-14 | Elastic theory of unconstrained non-Euclidean plates | Non-Euclidean plates are a subset of the class of elastic bodies having no stress-free configuration. Such bodies exhibit residual stress when relaxed from all external constraints, and may assume complicated equilibrium shapes even in the absence of external forces. In this work we present a mathematical framework for... | [
"cond-mat.soft"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
206764370 | 0810.2434 | 2008-10-14 | Faster and better: a machine learning approach to corner detection | The repeatability and efficiency of a corner detector determines how likely it is to be useful in a real-world application. The repeatability is importand because the same scene viewed from different positions should yield features which correspond to the same real-world 3D locations [Schmid et al 2000]. The efficiency... | [
"cs.CV",
"cs.LG"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
55776323 | 0810.2700 | 2008-10-15 | XPOL: a photoelectric polarimeter onboard XEUS | The XEUS mission incorporates two satellites: the Mirror Spacecraft with 5 m2 of collecting area at 1 keV and 2 m2 at 7 keV, and an imaging resolution of 5" HEW and the Payload Spacecraft which carries the focal plane instrumentation. XEUS was submitted to ESA Cosmic Vision and was selected for an advanced study as a l... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
17457753 | 0810.2647 | 2008-10-15 | Ion traps with enhanced optical and physical access | Small, controllable, highly accessible quantum systems can serve as probes at the single quantum level to study multiple physical effects, for example in quantum optics or for electric and magnetic field sensing. The applicability of trapped atomic ions as probes is highly dependent on the measurement situation at hand... | [
"quant-ph"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "r maiwald_1",
"name": "Robert Maiwald",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "d leibfried_1",
"name": "Dietrich Leibfried",
"publication_history": null,
"h_index": null,
"num_papers":... | null |
1061220 | 0810.2837 | 2008-10-15 | Adaptive Hybrid Deflection and Retransmission Routing for Optical Burst-Switched Networks | Burst contention is a well known challenging problem in Optical Burst Switching (OBS) networks. Deflection routing is used to resolve contention. Burst retransmission is used to reduce the Burst Loss Ratio (BLR) by retransmitting dropped bursts. Previous works show that combining deflection and retransmission outperfor... | [
"cs.NI"
] | null | [
"target.author.publication_history"
] | [] | [
{
"author_id": "m lévesque_1",
"name": "Martin Lévesque",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "h elbiaze_1",
"name": "Halima Elbiaze",
"publication_history": null,
"h_index": null,
"num_papers": nul... | null |
35031861 | 0810.2723 | 2008-10-15 | Star Formation Around Super-Massive Black Holes | The presence of young massive stars orbiting on eccentric rings within a few tenths of a parsec of the supermassive black hole in the Galactic centre is challenging for theories of star formation. The high tidal shear from the black hole should tear apart the molecular clouds that form stars elsewhere in the Galaxy, wh... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
3203867 | 0810.2777 | 2008-10-15 | Yet another look at Harris' ergodic theorem for Markov chains | The aim of this note is to present an elementary proof of a variation of Harris' ergodic theorem of Markov chains. This theorem, dating back to the fifties essentially states that a Markov chain is uniquely ergodic if it admits a ``small'' set which is visited infinitely often. This gives an extension of the ideas of D... | [
"math.PR",
"math.SP"
] | null | [
"target.author.publication_history",
"target.author.publication_history.key_reference"
] | [] | [
{
"author_id": "m hairer_1",
"name": "Martin Hairer",
"publication_history": null,
"h_index": null,
"num_papers": null,
"num_citations": null
},
{
"author_id": "j mattingly_1",
"name": "Jonathan [\"C.\"] Mattingly",
"publication_history": null,
"h_index": null,
"num_p... | null |
3106564 | 0810.2795 | 2008-10-15 | The population of early-type galaxies at 1<z<2 - New clues on their formation and evolution | [Abridged]We present the morphological analysis based on HST-NICMOS observations in the F160W filter of a sample of 32 early-type galaxies (ETGs) at 1<z<2 with spectroscopic confirmation of their redshift and spectral type. We find that ETGs at are composed of two distinct populations, an older population (oETGs) and a... | [
"astro-ph"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
8428666 | 0810.2656 | 2008-10-15 | An efficient algorithm for computing the Baker-Campbell-Hausdorff series and some of its applications | We provide a new algorithm for generating the Baker--Campbell--Hausdorff (BCH) series $Z = \log(\e^X \e^Y)$ in an arbitrary generalized Hall basis of the free Lie algebra $\mathcal{L}(X,Y)$ generated by $X$ and $Y$. It is based on the close relationship of $\mathcal{L}(X,Y)$ with a Lie algebraic structure of labeled ro... | [
"math-ph",
"math.MP"
] | null | [
"target.author.publication_history.key_reference"
] | null | null | null |
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