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18819303
1102.2197
2011-02-10
Baryons and baryonic matter in the large Nc and heavy quark limits
This paper explores properties of baryons and finite density baryonic matter in an artificial world in which Nc, the number of colors, is large and the quarks of all species are degenerate and much larger than {\Lambda}_QCD. It has long been known that in large Nc QCD, baryons composed entirely of heavy quarks are accu...
[ "nucl-th", "hep-ph", "hep-th" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "t cohen_4", "name": "Thomas [\"D.\"] Cohen", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "n kumar_22", "name": "Nilay Kumar", "publication_history": null, "h_index": null, "num_papers": null...
null
365654
1102.2254
2011-02-10
Matrix completion with column manipulation: Near-optimal sample-robustness-rank tradeoffs
This paper considers the problem of matrix completion when some number of the columns are completely and arbitrarily corrupted, potentially by a malicious adversary. It is well-known that standard algorithms for matrix completion can return arbitrarily poor results, if even a single column is corrupted. One direct appl...
[ "stat.ML", "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "8061516", "num_citations": null }, { "corpus_id": "1255437", "num_citations": null }, { "corpus_id": "7128002", "num_citations": null } ]
[ { "author_id": "y chen_265", "name": "Yudong Chen", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "h xu_90", "name": "Huan Xu", "publication_history": null, "h_index": null, "num_papers": null, "num_citat...
null
88518516
1102.2078
2011-02-10
A goodness-of-fit test for bivariate extreme-value copulas
It is often reasonable to assume that the dependence structure of a bivariate continuous distribution belongs to the class of extreme-value copulas. The latter are characterized by their Pickands dependence function. In this paper, a procedure is proposed for testing whether this function belongs to a given parametric ...
[ "math.ST", "stat.TH" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
51485834
1102.2189
2011-02-10
South Pole Telescope Detections of the Previously Unconfirmed Planck Early SZ Clusters in the Southern Hemisphere
We present South Pole Telescope (SPT) observations of the five galaxy cluster candidates in the southern hemisphere which were reported as unconfirmed in the Planck Early Sunyaev-Zel'dovich (ESZ) sample. One cluster candidate, PLCKESZ G255.62-46.16, is located in the 2500-square-degree SPT SZ survey region and was repo...
[ "astro-ph.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15201182
1102.2075
2011-02-10
How the result of graph clustering methods depends on the construction of the graph
We study the scenario of graph-based clustering algorithms such as spectral clustering. Given a set of data points, one first has to construct a graph on the data points and then apply a graph clustering algorithm to find a suitable partition of the graph. Our main question is if and how the construction of the graph (...
[ "stat.ML", "cs.DS" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "3264198", "num_citations": null } ]
[ { "author_id": "m maier_4", "name": "Markus Maier", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "u luxburg_1", "name": "Ulrike [\"von\"] Luxburg", "publication_history": null, "h_index": null, "num_papers":...
null
12718732
1102.2034
2011-02-10
A New Method for Measuring Edge Tensions and Stability of Lipid Bilayers: Effect of Membrane Composition
We report a new and facile method for measuring edge tensions of lipid membranes. The approach is based on electroporation of giant unilamellar vesicles and analysis of the pore closure dynamics. We applied this method to evaluate the edge tension in membranes with four different compositions: egg phosphatidylcholine (...
[ "physics.bio-ph", "cond-mat.soft" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "18045718", "num_citations": null } ]
[ { "author_id": "t portet_1", "name": "Thomas Portet", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r dimova_0", "name": "Rumiana Dimova", "publication_history": null, "h_index": null, "num_papers": null, ...
null
11729019
1102.2280
2011-02-10
On Oblivious PTAS's for Nash Equilibrium
If a game has a Nash equilibrium with probability values that are either zero or Omega(1) then this equilibrium can be found exhaustively in polynomial time. Somewhat surprisingly, we show that there is a PTAS for the games whose equilibria are guaranteed to have small-O(1/n)-values, and therefore large-Omega(n)-suppor...
[ "cs.GT", "stat.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
118416357
1102.2181
2011-02-10
COrE (Cosmic Origins Explorer) A White Paper
COrE (Cosmic Origins Explorer) is a fourth-generation full-sky, microwave-band satellite recently proposed to ESA within Cosmic Vision 2015-2025. COrE will provide maps of the microwave sky in polarization and temperature in 15 frequency bands, ranging from 45 GHz to 795 GHz, with an angular resolution ranging from 23 ...
[ "astro-ph.CO" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "15743302", "num_citations": null }, { "corpus_id": "119289852", "num_citations": null }, { "corpus_id": "15836624", "num_citations": null }, { "corpus_id": "14287533", "num_citations": null }, { "corpus_id": "118529632", "num_citations": null ...
[ { "author_id": "t armitage-caplan_0", "name": "The [\"COrE\",\"Collaboration\",\"C.\"] Armitage-Caplan", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m avillez_1", "name": "Miguel [\"A.\",\"de\"] Avillez", "publica...
null
119184466
1102.2204
2011-02-10
A Constraint on the Organization of the Galactic Center Magnetic Field Using Faraday Rotation
We present new 6 and 20 cm Very Large Array (VLA) observations of polarized continuum emission of roughly 0.5 square degrees of the Galactic center (GC) region. The 6 cm observations detect diffuse linearly-polarized emission throughout the region with a brightness of roughly 1 mJy per 15"x10" beam. The Faraday rotatio...
[ "astro-ph.GA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15900101
1102.2233
2011-02-10
A Constrained L1 Minimization Approach to Sparse Precision Matrix Estimation
A constrained L1 minimization method is proposed for estimating a sparse inverse covariance matrix based on a sample of $n$ iid $p$-variate random variables. The resulting estimator is shown to enjoy a number of desirable properties. In particular, it is shown that the rate of convergence between the estimator and the ...
[ "stat.ME" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
88518445
1102.2072
2011-02-10
On the heavy-tailedness of Student's $t$-statistic
Let $\{X_i\}_{i\geq1}$ be an i.i.d. sequence of random variables and define, for $n\geq2$, \[T_n=\cases{n^{-1/2}\hat{\sigma}_n^{-1}S_n,\quad \hat{\sigma}_n>0,\cr 0,\quad \hat{\sigma}_n=0,}with S_n=\sum_{i=1}^nX_i, \hat{\sigma}^2_n=\frac{1}{n-1}\sum_{i=1}^n(X_i-n^{-1}S_n)^2.\] We investigate the connection between the d...
[ "math.ST", "stat.TH" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
88518941
1102.2064
2011-02-10
Asymptotic distributions and subsampling in spectral analysis for almost periodically correlated time series
The aim of this article is to establish asymptotic distributions and consistency of subsampling for spectral density and for magnitude of coherence for non-stationary, almost periodically correlated time series. We show the asymptotic normality of the spectral density estimator and the limiting distribution of a magnit...
[ "math.ST", "stat.TH" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
54709732
1102.2025
2011-02-10
Nonequilibrium work performed in quantum annealing
Quantum annealing is a generic solver of classical optimization problems that makes full use of quantum fluctuations. We consider work statistics given by a repetition of quantum annealing processes by employing the Jarzynski equality proposed in nonequilibrium statistical physics. In particular, we analyze the distrib...
[ "cond-mat.dis-nn", "cond-mat.stat-mech", "quant-ph" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m ohzeki_1", "name": "Masayuki Ohzeki", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "h nishimori_1", "name": "Hidetoshi Nishimori", "publication_history": null, "h_index": null, "num_papers"...
null
11554719
1102.2166
2011-02-10
Social Structure of Facebook Networks
We study the social structure of Facebook "friendship" networks at one hundred American colleges and universities at a single point in time, and we examine the roles of user attributes - gender, class year, major, high school, and residence - at these institutions. We investigate the influence of common attributes at t...
[ "cs.SI", "nlin.AO", "physics.soc-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119201264
1102.2352
2011-02-11
Simulating Flaring Events in Complex Active Regions Driven by Observed Magnetograms
We interpret solar flares as events originating from active regions that have reached the Self Organized Critical state, by using a refined Cellular Automaton model with initial conditions derived from observations. Aims: We investigate whether the system, with its imposed physical elements,reaches a Self Organized Cri...
[ "astro-ph.SR" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "11517764", "num_citations": null } ]
[ { "author_id": "m dimitropoulou_1", "name": "Michaila Dimitropoulou", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "h isliker_1", "name": "Heinz Isliker", "publication_history": null, "h_index": null, "num_p...
null
32585404
1102.2451
2011-02-11
A geometric framework for black hole perturbations
Black hole perturbation theory is typically studied on time surfaces that extend between the bifurcation sphere and spatial infinity. From a physical point of view, however, it may be favorable to employ time surfaces that extend between the future event horizon and future null infinity. This framework resolves problem...
[ "gr-qc" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15813125
1102.2423
2011-02-11
Social network dynamics of face-to-face interactions
The recent availability of data describing social networks is changing our understanding of the "microscopic structure" of a social tie. A social tie indeed is an aggregated outcome of many social interactions such as face-to-face conversations or phone-calls. Analysis of data on face-to-face interactions shows that su...
[ "physics.soc-ph", "cond-mat.dis-nn", "cond-mat.stat-mech", "cs.SI" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
12591819
1102.2318
2011-02-11
Advances in Quantum Metrology
In classical estimation theory, the central limit theorem implies that the statistical error in a measurement outcome can be reduced by an amount proportional to n^(-1/2) by repeating the measures n times and then averaging. Using quantum effects, such as entanglement, it is often possible to do better, decreasing the ...
[ "quant-ph", "cond-mat.mes-hall", "math-ph", "math.MP" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
3736082
1102.2368
2011-02-11
Picturing classical and quantum Bayesian inference
We introduce a graphical framework for Bayesian inference that is sufficiently general to accommodate not just the standard case but also recent proposals for a theory of quantum Bayesian inference wherein one considers density operators rather than probability distributions as representative of degrees of belief. The ...
[ "quant-ph", "cs.LO", "math.CT", "math.PR" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "1550408", "num_citations": null }, { "corpus_id": "8477212", "num_citations": null }, { "corpus_id": "52059959", "num_citations": null } ]
[ { "author_id": "b coecke_1", "name": "Bob Coecke", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r spekkens_1", "name": "Robert [\"W.\"] Spekkens", "publication_history": null, "h_index": null, "num_papers":...
null
56094387
1102.2274
2011-02-11
Polarization observations of 20 millisecond pulsars
Polarization profiles are presented for 20 millisecond pulsars that are being observed as part of the Parkes Pulsar Timing Array project. The observations used the Parkes multibeam receiver with a central frequency of 1369 MHz and the Parkes digital filterbank pulsar signal-processing system PDFB2. Because of the large...
[ "astro-ph.SR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
118508484
1102.2401
2011-02-11
Quasiparticle states around a nonmagnetic impurity in electron-doped iron-based superconductors with spin-density-wave order
The quasiparticle states around a nonmagnetic impurity in electron-doped iron-based superconductors with spin-density-wave (SDW) order are investigated as a function of doping and impurity scattering strength. In the undoped sample, where a pure SDW state exists, two impurity-induced resonance peaks are observed around...
[ "cond-mat.supr-con" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
6345726
1102.2490
2011-02-12
The KL-UCB Algorithm for Bounded Stochastic Bandits and Beyond
This paper presents a finite-time analysis of the KL-UCB algorithm, an online, horizon-free index policy for stochastic bandit problems. We prove two distinct results: first, for arbitrary bounded rewards, the KL-UCB algorithm satisfies a uniformly better regret bound than UCB or UCB2; second, in the special case of Be...
[ "math.ST", "cs.LG", "cs.SY", "math.OC", "stat.TH" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
3204471
1102.2529
2011-02-12
Efficient Analysis of Probabilistic Programs with an Unbounded Counter
We show that a subclass of infinite-state probabilistic programs that can be modeled by probabilistic one-counter automata (pOC) admits an efficient quantitative analysis. In particular, we show that the expected termination time can be approximated up to an arbitrarily small relative error with polynomially many arith...
[ "cs.FL" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8028882
1102.2566
2011-02-12
Key Reduction of McEliece's Cryptosystem Using List Decoding
Different variants of the code-based McEliece cryptosystem were pro- posed to reduce the size of the public key. All these variants use very structured codes, which open the door to new attacks exploiting the underlying structure. In this paper, we show that the dyadic variant can be designed to resist all known attack...
[ "cs.CR", "cs.IT", "math.IT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8062939
1102.2506
2011-02-12
Opportunistic Relaying for Space-Time Coded Cooperation with Multiple Antenna Terminals
We consider a wireless relay network with multiple antenna terminals over Rayleigh fading channels, and apply distributed space-time coding (DSTC) in amplify-and-forward (A&F) mode. The A&F scheme is used in a way that each relay transmits a scaled version of the linear combination of the received symbols. It turns out...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "b maham_1", "name": "Behrouz Maham", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a hjørungnes_1", "name": "Are Hjørungnes", "publication_history": null, "h_index": null, "num_papers": null,...
null
23138424
1102.2504
2011-02-12
Cognitive Multiple Access Network with Outage Margin in the Primary System
This paper investigates the problem of spectrally efficient operation of a multiuser uplink cognitive radio system in the presence of a single primary link. The secondary system applies opportunistic interference cancelation (OIC) and decode the primary signal when such an opportunity is created. We derive the achievab...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "b maham_1", "name": "Behrouz Maham", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "p popovski_1", "name": "Petar Popovski", "publication_history": null, "h_index": null, "num_papers": null, ...
null
3204575
1102.3340
2011-02-12
Multi-skill Collaborative Teams based on Densest Subgraphs
We consider the problem of identifying a team of skilled individuals for collaboration, in the presence of a social network. Each node in the social network may be an expert in one or more skills. Edge weights specify affinity or collaborative compatibility between respective nodes. Given a project that requires a set ...
[ "cs.SI", "cs.DS", "physics.soc-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119594089
1102.2535
2011-02-12
Universality in bipartite mean field spin glasses
In this work we give a proof of universality with respect to the choice of the statistical distribution of the quenched noise, for mean field bipartite spin glasses. We use mainly techniques of spin glasses theory, as Guerra's interpolation and the cavity approach. As a direct conseguence of our results, we have a proo...
[ "math.PR", "cond-mat.dis-nn", "math-ph", "math.MP" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
199906
1102.2521
2011-02-12
A Logical Method for Policy Enforcement over Evolving Audit Logs
We present an iterative algorithm for enforcing policies represented in a first-order logic, which can, in particular, express all transmission-related clauses in the HIPAA Privacy Rule. The logic has three features that raise challenges for enforcement --- uninterpreted predicates (used to model subjective concepts in...
[ "cs.LO", "cs.CR" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "d garg_3", "name": "Deepak Garg", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "l jia_3", "name": "Limin Jia", "publication_history": null, "h_index": null, "num_papers": null, "num_citat...
null
7493175
1102.2604
2011-02-13
Quasi-Optimal Network Utility Maximization for Scalable Video Streaming
This paper addresses rate control for transmission of scalable video streams via Network Utility Maximization (NUM) formulation. Due to stringent QoS requirements of video streams and specific characterization of utility experienced by end-users, one has to solve nonconvex and even nonsmooth NUM formulation for such st...
[ "cs.MM", "cs.NI" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "m talebi_1", "name": "Mohammad [\"Sadegh\"] Talebi", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a khonsari_1", "name": "Ahmad Khonsari", "publication_history": null, "h_index": null, "num_...
null
18955166
1102.2670
2011-02-13
Online Least Squares Estimation with Self-Normalized Processes: An Application to Bandit Problems
The analysis of online least squares estimation is at the heart of many stochastic sequential decision making problems. We employ tools from the self-normalized processes to provide a simple and self-contained proof of a tail bound of a vector-valued martingale. We use the bound to construct a new tighter confidence se...
[ "cs.AI" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "3204347", "num_citations": null } ]
[ { "author_id": "y abbasi-yadkori_1", "name": "Yasin Abbasi-Yadkori", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "d pál_1", "name": "Dávid Pál", "publication_history": null, "h_index": null, "num_papers": n...
null
1914762
1102.2777
2011-02-14
Inclusive Charged--Current Neutrino--Nucleus Reactions
We present a model for weak CC induced nuclear reactions at energies of interest for current and future neutrino oscillation experiments. This model is a natural extension of the work of Refs.[1,2], where the QE contribution to the inclusive electron and neutrino scattering on nuclei was analyzed. The model is based on...
[ "hep-ph", "nucl-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
8015801
1102.2868
2011-02-14
Interference Networks with Point-to-Point Codes
The paper establishes the capacity region of the Gaussian interference channel with many transmitter-receiver pairs constrained to use point-to-point codes. The capacity region is shown to be strictly larger in general than the achievable rate regions when treating interference as noise, using successive interference c...
[ "cs.IT", "math.IT", "math.PR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
39904319
1102.2759
2011-02-14
Observation of $B_s^0\to J/\psi f_0(980)$ and Evidence for $B_s^0\to J/\psi f_0(1370)$
We report the first observation of $B_s^0\to J/\psi f_0(980)$ and first evidence for $B_s^0\to J/\psi f_0(1370)$, which are CP eigenstate decay modes. These results are obtained from $121.4\;\mathrm{fb}^{-1}$ of data collected at the $\Upsilon(5S)$ resonance with the Belle detector at the KEKB $e^+e^-$ collider. We mea...
[ "hep-ex" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
11366071
1102.2789
2011-02-14
Algebraic Independence and Blackbox Identity Testing
Algebraic independence is an advanced notion in commutative algebra that generalizes independence of linear polynomials to higher degree. Polynomials {f_1, ..., f_m} \subset \F[x_1, ..., x_n] are called algebraically independent if there is no non-zero polynomial F such that F(f_1, ..., f_m) = 0. The transcendence degr...
[ "cs.CC", "math.AC" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
11700981
1102.2808
2011-02-14
Transductive Ordinal Regression
Ordinal regression is commonly formulated as a multi-class problem with ordinal constraints. The challenge of designing accurate classifiers for ordinal regression generally increases with the number of classes involved, due to the large number of labeled patterns that are needed. The availability of ordinal class labe...
[ "cs.LG" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "c seah_1", "name": "Chun-Wei Seah", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "i tsang_3", "name": "Ivor [\"Wai-Hung\"] Tsang", "publication_history": null, "h_index": null, "num_papers": ...
null
2008990
1102.2878
2011-02-14
Dual-Tree Fast Gauss Transforms
Kernel density estimation (KDE) is a popular statistical technique for estimating the underlying density distribution with minimal assumptions. Although they can be shown to achieve asymptotic estimation optimality for any input distribution, cross-validating for an optimal parameter requires significant computation do...
[ "stat.CO", "cs.DS", "stat.ML" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "d lee_87", "name": "Dongryeol Lee", "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_papers": nul...
null
2229225
1102.2700
2011-02-14
On (Partial) Unit Memory Codes Based on Gabidulin Codes
(Partial) Unit Memory ((P)UM) codes provide a powerful possibility to construct convolutional codes based on block codes in order to achieve a high decoding performance. In this contribution, a construction based on Gabidulin codes is considered. This construction requires a modified rank metric, the so-called sum rank...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "10178357", "num_citations": null } ]
[ { "author_id": "a wachter-zeh_1", "name": "Antonia Wachter-Zeh", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "v sidorenko_1", "name": "Vladimir [\"R.\"] Sidorenko", "publication_history": null, "h_index": null,...
null
14969365
1102.2825
2011-02-14
Algorithmic Aspects of Energy-Delay Tradeoff in Multihop Cooperative Wireless Networks
We consider the problem of energy-efficient transmission in delay constrained cooperative multihop wireless networks. The combinatorial nature of cooperative multihop schemes makes it difficult to design efficient polynomial-time algorithms for deciding which nodes should take part in cooperation, and when and with wha...
[ "math.OC", "cs.DS", "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "m baghaie_1", "name": "Marjan [\"A.\"] Baghaie", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "b krishnamachari_1", "name": "Bhaskar Krishnamachari", "publication_history": null, "h_index": null,...
null
88518857
1102.2650
2011-02-14
Estimating and understanding exponential random graph models
We introduce a method for the theoretical analysis of exponential random graph models. The method is based on a large-deviations approximation to the normalizing constant shown to be consistent using theory developed by Chatterjee and Varadhan [European J. Combin. 32 (2011) 1000-1017]. The theory explains a host of dif...
[ "math.PR", "math-ph", "math.MP", "math.ST", "stat.TH" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
15050532
1102.2787
2011-02-14
On the Sum Capacity of the Y-Channel
A network where three users communicate with each other via a relay is considered. Users do not receive other users' signals via a direct link, and thus the relay is essential for their communication. Each user is assumed to have an individual message to be delivered to each other user. Thus, each user wants to send tw...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a chaaban_1", "name": "Anas Chaaban", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a sezgin_1", "name": "Aydin Sezgin", "publication_history": null, "h_index": null, "num_papers": null, ...
null
8747684
1102.2835
2011-02-14
On the Geometry of Multi-Dirac Structures and Gerstenhaber Algebras
In a companion paper, we introduced a notion of multi-Dirac structures, a graded version of Dirac structures, and we discussed their relevance for classical field theories. In the current paper we focus on the geometry of multi-Dirac structures. After recalling the basic definitions, we introduce a graded multiplicatio...
[ "math.DG", "math-ph", "math.MP" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "115171810", "num_citations": null } ]
[ { "author_id": "j vankerschaver_1", "name": "Joris Vankerschaver", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "h yoshimura_1", "name": "Hiroaki Yoshimura", "publication_history": null, "h_index": null, "nu...
null
2572789
1102.2841
2011-02-14
Interval graph limits
We work out the graph limit theory for dense interval graphs. The theory developed departs from the usual description of a graph limit as a symmetric function $W(x,y)$ on the unit square, with $x$ and $y$ uniform on the interval $(0,1)$. Instead, we fix a $W$ and change the underlying distribution of the coordinates $x...
[ "math.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16259
1102.2704
2011-02-14
Diffusion with Stochastic Resetting
We study simple diffusion where a particle stochastically resets to its initial position at a constant rate r. A finite resetting rate leads to a nonequilibrium stationary state with non-Gaussian fluctuations for the particle position. We also show that the mean time to find a stationary target by a diffusive searcher ...
[ "cond-mat.stat-mech" ]
null
[ "target.key_reference" ]
null
null
null
17417814
1102.2732
2011-02-14
Discrete Breathers in a Realistic Coarse-Grained Model of Proteins
We report the results of molecular dynamics simulations of an off-lattice protein model featuring a physical force-field and amino-acid sequence. We show that localized modes of nonlinear origin (discrete breathers) emerge naturally as continuations of a subset of high-frequency normal modes residing at specific sites ...
[ "cond-mat.dis-nn", "nlin.PS", "q-bio.BM" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s luccioli_0", "name": "Stefano Luccioli", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a imparato_1", "name": "Alberto Imparato", "publication_history": null, "h_index": null, "num_papers":...
null
777025
1102.2797
2011-02-14
On the Security of Index Coding with Side Information
Security aspects of the Index Coding with Side Information (ICSI) problem are investigated. Building on the results of Bar-Yossef et al. (2006), the properties of linear index codes are further explored. The notion of weak security, considered by Bhattad and Narayanan (2005) in the context of network coding, is general...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "3036315", "num_citations": null } ]
[ { "author_id": "s dau_1", "name": "Son [\"Hoang\"] Dau", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "v skachek_1", "name": "Vitaly Skachek", "publication_history": null, "h_index": null, "num_papers": null...
null
2138383
1102.2910
2011-02-14
Constructing local bulk observables in interacting AdS/CFT
Local operators in the bulk of AdS can be represented as smeared operators in the dual CFT. We show how to construct these bulk observables by requiring that the bulk operators commute at spacelike separation. This extends our previous work by taking interactions into account. Large-N factorization plays a key role in ...
[ "hep-th" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9426685
1102.2791
2011-02-14
A Hybrid Global Minimization Scheme for Accurate Source Localization in Sensor Networks
We consider the localization problem of multiple wideband sources in a multi-path environment by coherently taking into account the attenuation characteristics and the time delays in the reception of the signal. Our proposed method leaves the space for unavailability of an accurate signal attenuation model in the envir...
[ "cs.NI" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "h aghasi_1", "name": "Hamidreza Aghasi", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "h amindavar_1", "name": "Hamidreza Amindavar", "publication_history": null, "h_index": null, "num_papers...
null
119281297
1102.2775
2011-02-14
Synchronization of spatiotemporal semiconductor lasers and its application in color image encryption
Optical chaos is a topic of current research characterized by high-dimensional nonlinearity which is attributed to the delay-induced dynamics, high bandwidth and easy modular implementation of optical feedback. In light of these facts, which adds enough confusion and diffusion properties for secure communications, we e...
[ "physics.optics", "nlin.CD" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "s banerjee_34", "name": "Santo Banerjee", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "l rondoni_1", "name": "Lamberto Rondoni", "publication_history": null, "h_index": null, "num_papers": n...
null
5779647
1102.2853
2011-02-14
An extension of the Moser-Tardos algorithmic local lemma
A recent theorem of Bissacot, et al. proved using results about the cluster expansion in statistical mechanics extends the Lov\'asz Local Lemma by weakening the conditions under which its conclusions holds. In this note, we prove an algorithmic analog of this result, extending Moser and Tardos's recent algorithmic Loca...
[ "math.CO", "cs.DS" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
10743012
1102.2950
2011-02-15
Kron Reduction of Graphs with Applications to Electrical Networks
Consider a weighted and undirected graph, possibly with self-loops, and its corresponding Laplacian matrix, possibly augmented with additional diagonal elements corresponding to the self-loops. The Kron reduction of this graph is again a graph whose Laplacian matrix is obtained by the Schur complement of the original L...
[ "math.CO", "cs.DM", "cs.SY", "math-ph", "math.MP", "math.OC" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
38465246
1102.3118
2011-02-15
Update rules and interevent time distributions: Slow ordering vs. no ordering in the Voter Model
We introduce a general methodology of update rules accounting for arbitrary interevent time distributions in simulations of interacting agents. In particular we consider update rules that depend on the state of the agent, so that the update becomes part of the dynamical model. As an illustration we consider the voter m...
[ "physics.soc-ph", "cond-mat.stat-mech" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119181553
1102.2958
2011-02-15
Enhanced neutrino signals from dark matter annihilation in the Sun via metastable mediators
We calculate the neutrino signal resulting from annihilation of secluded dark matter in the Sun. In this class of models, dark matter annihilates first into metastable mediators, which subsequently decay into Standard Model particles. If the mediators are long lived, they will propagate out from the dense solar core be...
[ "hep-ph", "astro-ph.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
12175779
1102.3126
2011-02-15
Reduced-Complexity Collaborative Decoding of Interleaved Reed-Solomon and Gabidulin Codes
An alternative method for collaborative decoding of interleaved Reed-Solomon codes as well as Gabidulin codes for the case of high interleaving degree is proposed. As an example of application, simulation results are presented for a concatenated coding scheme using polar codes as inner codes.
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
116973339
1102.3172
2011-02-15
Stochastic derivatives and generalized h-transforms of Markov processes
Let $R$ be a continuous-time Markov process on the time interval $[0,1]$ with values in some state space $X$. We transform this reference process $R$ into $P:=f(X_0)\exp (-\int_0^1 V_t(X_t) dt) g(X_1)\,R$ where $f,g$ are nonnegative measurable functions on X and V is some measurable function on $[0,1]\times X$. It is e...
[ "math.PR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
56017172
1102.3185
2011-02-15
Dynamical effects of stellar mass loss on a Kuiper-like belt
A quarter of DA white dwarfs are metal polluted, yet elements heavier than helium sink down through the stellar atmosphere on timescales of days. Hence, these white dwarfs must be currently accreting material containing heavy elements. Here, we consider whether the scattering of comets or asteroids from an outer planet...
[ "astro-ph.EP" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "14215956", "num_citations": null }, { "corpus_id": "18091063", "num_citations": null }, { "corpus_id": "14171378", "num_citations": null }, { "corpus_id": "118624486", "num_citations": null }, { "corpus_id": "3210611", "num_citations": null }...
[ { "author_id": "a bonsor_1", "name": "Amy Bonsor", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a mustill_1", "name": "Alexander [\"J.\"] Mustill", "publication_history": null, "h_index": null, "num_papers"...
null
119195800
1102.3153
2011-02-15
Metal accretion onto white dwarfs caused by Poynting-Robertson drag on their debris disks
Recent discoveries of compact (sizes $<R_\odot$) debris disks around more than a dozen of metal-rich white dwarfs (WDs) suggest that pollution of these stars with metals may be caused by accretion of high-Z material from the disk. But the mechanism responsible for efficient transfer of mass from a particulate disk to t...
[ "astro-ph.EP", "astro-ph.SR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14081686
1102.3176
2011-02-15
Selecting the rank of truncated SVD by Maximum Approximation Capacity
Truncated Singular Value Decomposition (SVD) calculates the closest rank-$k$ approximation of a given input matrix. Selecting the appropriate rank $k$ defines a critical model order choice in most applications of SVD. To obtain a principled cut-off criterion for the spectrum, we convert the underlying optimization prob...
[ "cs.IT", "cs.LG", "math.IT", "stat.ML" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "1072041", "num_citations": null } ]
[ { "author_id": "m frank_3", "name": "Mario Frank", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j buhmann_1", "name": "Joachim [\"M.\"] Buhmann", "publication_history": null, "h_index": null, "num_papers": ...
null
58891724
1102.3182
2011-02-15
On the Impact of NMC Data on NLO and NNLO Parton Distributions and Higgs Production at the Tevatron and the LHC
We discuss the impact of the treatment of NMC structure function data on parton distributions in the context of the NNPDF2.1 global PDF determination at NLO and NNLO. We show that the way these data are treated, and even their complete removal, has no effect on parton distributions at NLO, and at NNLO has an effect whi...
[ "hep-ph", "hep-ex" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "t ball_3", "name": "The [\"Nnpdf\",\"Collaboration\",\"Richard\",\"D.\"] Ball", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "v bertone_1", "name": "Valerio Bertone", "publication_history": null, ...
null
119122098
1102.3190
2011-02-15
Viscous Shock Capturing in a Time-Explicit Discontinuous Galerkin Method
We present a novel, cell-local shock detector for use with discontinuous Galerkin (DG) methods. The output of this detector is a reliably scaled, element-wise smoothness estimate which is suited as a control input to a shock capture mechanism. Using an artificial viscosity in the latter role, we obtain a DG scheme for ...
[ "math.NA" ]
null
[ "target.author.publication_history" ]
[ { "corpus_id": "5861872", "num_citations": null } ]
[ { "author_id": "a klockner_1", "name": "Andreas Klockner", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "t warburton_1", "name": "Tim Warburton", "publication_history": null, "h_index": null, "num_papers": n...
null
2925403
1102.3199
2011-02-15
How to Transform and Filter Images using Iterated Function Systems
We present a general theory of fractal transformations and show how it leads to a new type of method for filtering and transforming digital images. This work substantially generalizes earlier work on fractal tops. The approach involves fractal geometry, chaotic dynamics, and an interplay between discrete and continuous...
[ "math.GT", "math.MG" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "m barnsley_1", "name": "Michael [\"F.\"] Barnsley", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "b harding_1", "name": "Brendan Harding", "publication_history": null, "h_index": null, "num_p...
null
37315726
1102.3108
2011-02-15
Adaptation to anisotropy and inhomogeneity via dyadic piecewise polynomial selection
This article is devoted to nonlinear approximation and estimation via piecewise polynomials built on partitions into dyadic rectangles. The approximation rate is studied over possibly inhomogeneous and anisotropic smoothness classes that contain Besov classes. Highlighting the interest of such a result in statistics, a...
[ "math.ST", "math.CA", "math.FA", "stat.TH" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
1406424
1102.3214
2011-02-15
LQG Control Approach to Gaussian Broadcast Channels with Feedback
A code for communication over the k-receiver additive white Gaussian noise broadcast channel with feedback is presented and analyzed using tools from the theory of linear quadratic Gaussian optimal control. It is shown that the performance of this code depends on the noise correlation at the receivers and it is related...
[ "cs.IT", "math.IT", "math.OC" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
53629324
1102.3069
2011-02-15
MuMax: a new high-performance micromagnetic simulation tool
We present MuMax, a general-purpose micromagnetic simulation tool running on Graphical Processing Units (GPUs). MuMax is designed for high performance computations and specifically targets large simulations. In that case speedups of over a factor 100x can easily be obtained compared to the CPU-based OOMMF program devel...
[ "physics.comp-ph", "cond-mat.mes-hall", "cond-mat.mtrl-sci" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
18348605
1102.3056
2011-02-15
A Phenomenological Study on Threshold Improvement via Spatial Coupling
Kudekar et al. proved an interesting result in low-density parity-check (LDPC) convolutional codes: The belief-propagation (BP) threshold is boosted to the maximum-a-posteriori (MAP) threshold by spatial coupling. Furthermore, the authors showed that the BP threshold for code-division multiple-access (CDMA) systems is ...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "6233895", "num_citations": null } ]
[ { "author_id": "k takeuchi_2", "name": "Keigo Takeuchi", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "t tanaka_3", "name": "Toshiyuki TANAKA", "publication_history": null, "h_index": null, "num_papers": nul...
null
6244791
1102.3162
2011-02-15
Network Coding: Is zero error always possible?
In this work we study zero vs. epsilon-error capacity in network coding instances. For multicast network coding it is well known that all rates that can be delivered with arbitrarily small error probability can also be delivered with zero error probability; that is, the epsilon-error multicast capacity region and zero-...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119575699
1102.3036
2011-02-15
Boundary unitary representations - irreducibility and rigidity
Let $M$ be compact negatively curved manifold, $\Gamma =\pi_1(M)$ and $\tilde{M}$ be its universal cover. Denote by $B =\partial \tilde{M}$ the geodesic boundary of $\tilde{M}$ and by $\nu$ the Patterson-Sullivan measure on $X$. In this note we prove that the associated unitary representation of $\Gamma$ on $L^2(B,\nu)...
[ "math.DS", "math.GR", "math.RT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
10500083
1102.3132
2011-02-15
Connection between Annealed Free Energy and Belief Propagation on Random Factor Graph Ensembles
Recently, Vontobel showed the relationship between Bethe free energy and annealed free energy for protograph factor graph ensembles. In this paper, annealed free energy of any random regular, irregular and Poisson factor graph ensembles are connected to Bethe free energy. The annealed free energy is expressed as the so...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7599678
1102.3061
2011-02-15
Improvement of BP-Based CDMA Multiuser Detection by Spatial Coupling
Kudekar et al. proved that the belief-propagation (BP) threshold for low-density parity-check codes can be boosted up to the maximum-a-posteriori (MAP) threshold by spatial coupling. In this paper, spatial coupling is applied to randomly-spread code-division multiple-access (CDMA) systems in order to improve the perfor...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[ { "corpus_id": "6233895", "num_citations": null } ]
[ { "author_id": "k takeuchi_2", "name": "Keigo Takeuchi", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "t tanaka_3", "name": "Toshiyuki TANAKA", "publication_history": null, "h_index": null, "num_papers": nul...
null
15635491
1102.3208
2011-02-16
Geometry and Curvature of Spin Networks
A measure for the maximum quantum information transfer capacity (ITC) between nodes of a spin network is defined, and shown to induce a metric on a space of equivalence classes of nodes for homogeneous chains with XX and Heisenberg couplings. The geometry and curvature of spin chains with respect of this metric are stu...
[ "quant-ph" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "e jonckheere_1", "name": "Edmond [\"A.\"] Jonckheere", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s schirmer_1", "name": "Sophie [\"G.\"] Schirmer", "publication_history": null, "h_index": nul...
null
1452617
1102.3402
2011-02-16
The Length of the Longest Increasing Subsequence of a Random Mallows Permutation
The Mallows measure on the symmetric group $S_n$ is the probability measure such that each permutation has probability proportional to $q$ raised to the power of the number of inversions, where $q$ is a positive parameter and the number of inversions of $\pi$ is equal to the number of pairs $i<j$ such that $\pi_i > \pi...
[ "math.PR", "math-ph", "math.MP" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
3005566
1102.3328
2011-02-16
An Efficient and Integrated Algorithm for Video Enhancement in Challenging Lighting Conditions
We describe a novel integrated algorithm for real-time enhancement of video acquired under challenging lighting conditions. Such conditions include low lighting, haze, and high dynamic range situations. The algorithm automatically detects the dominate source of impairment, then depending on whether it is low lighting, ...
[ "cs.GR", "cs.CV" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "x dong_6", "name": "Xuan Dong", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "j wen_24", "name": "Jiangtao Wen", "publication_history": null, "h_index": null, "num_papers": null, "num_cit...
null
118716203
1102.3398
2011-02-16
Dissecting the size evolution of elliptical galaxies since z~1: puffing up vs minor merging scenarios
We have explored the buildup of the local mass-size relation of elliptical galaxies using two visually classified samples. At low redshift we compiled a subsample of 2,656 elliptical galaxies from SDSS, whereas at higher redshift (up to z~1) we extracted a sample of 228 object from the HST/ACS images of the GOODS. All ...
[ "astro-ph.CO", "astro-ph.GA" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
54759086
1102.3215
2011-02-16
Brownian motion on R trees
The real trees form a class of metric spaces that extends the class of trees with edge lengths by allowing behavior such as infinite total edge length and vertices with infinite branching degree. We use Dirichlet form methods to construct Brownian motion on any given locally compact $R$-tree {$(T,r)$} equipped with a R...
[ "math.PR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
706555
1102.3504
2011-02-16
Cooperative Defense against Pollution Attacks in Network Coding Using SpaceMac
Intra-session network coding is known to be vulnerable to pollution attacks. In this work, first, we introduce a novel homomorphic MAC scheme called SpaceMac, which allows an intermediate node to verify if its received packets belong to a specific subspace, even if the subspace is expanding over time. Then, we use Spac...
[ "cs.CR", "cs.NI" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a le_5", "name": "Anh Le", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "a markopoulou_1", "name": "Athina Markopoulou", "publication_history": null, "h_index": null, "num_papers": null, ...
null
1511912
1102.3508
2011-02-16
Online Learning of Rested and Restless Bandits
In this paper we study the online learning problem involving rested and restless multiarmed bandits with multiple plays. The system consists of a single player/user and a set of K finite-state discrete-time Markov chains (arms) with unknown state spaces and statistics. At each time step the player can play M arms. The ...
[ "math.OC", "cs.LG" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null
118738492
1102.3339
2011-02-16
Bose-glass, superfluid, and rung-Mott phases of hard-core bosons in disordered two-leg ladders
By means of Monte Carlo techniques, we study the role of disorder on a system of hard-core bosons in a two-leg ladder with both intra-chain ($t$) and inter-chain ($t^\prime$) hoppings. We find that the phase diagram as a function of the boson density, disorder strength, and $t^\prime/t$ is far from being trivial. This ...
[ "cond-mat.str-el" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j carrasquilla_1", "name": "Juan [\"Felipe\"] Carrasquilla", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "f becca_1", "name": "Federico Becca", "publication_history": null, "h_index": null, ...
null
835307
1102.3260
2011-02-16
Adaptive Cluster Expansion for Inferring Boltzmann Machines with Noisy Data
We introduce a procedure to infer the interactions among a set of binary variables, based on their sampled frequencies and pairwise correlations. The algorithm builds the clusters of variables contributing most to the entropy of the inferred Ising model, and rejects the small contributions due to the sampling noise. Ou...
[ "physics.data-an", "cond-mat.stat-mech", "cs.LG", "q-bio.NC", "q-bio.QM" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
59150002
1102.3447
2011-02-16
On Tensor Products of Simple Modules for Simple Groups
In an attempt to get some information on the multiplicative structure of the Green ring we study algebraic modules for simple groups, and associated groups such as quasisimple and almost-simple groups. We prove that, for almost all groups of Lie type in defining characteristic, the natural module is non-algebraic. For ...
[ "math.RT", "math.GR" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7404609
1102.3515
2011-02-16
On Gromov's Method of Selecting Heavily Covered Points
A result of Boros and F\"uredi ($d=2$) and of B\'ar\'any (arbitrary $d$) asserts that for every $d$ there exists $c_d>0$ such that for every $n$-point set $P\subset \R^d$, some point of $\R^d$ is covered by at least $c_d{n\choose d+1}$ of the $d$-simplices spanned by the points of $P$. The largest possible value of $c_...
[ "math.CO", "cs.CG" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
117946795
1102.3415
2011-02-16
Aberrating the CMB sky: fast and accurate computation of the aberration kernel
It is well known that our motion with respect to the cosmic microwave background (CMB) rest frame introduces a large dipolar CMB anisotropy, with an amplitude ~beta=v/c~10^{-3}. In addition it should lead to a small breaking of statistical isotropy which becomes most notable at higher multipoles. In principle this coul...
[ "astro-ph.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
16454554
1102.3216
2011-02-16
The Two-User Gaussian Fading Broadcast Channel
This paper presents outerbounds for the two-user Gaussian fading broadcast channel. These outerbounds are based on Costa's entropy power inequality (Costa-EPI) and are formulated mathematically as a feasibility problem. For classes of the two-user Gaussian fading broadcast channel where the outerbound is found to have ...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a jafarian_2", "name": "Amin Jafarian", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s vishwanath_2", "name": "Sriram Vishwanath", "publication_history": null, "h_index": null, "num_papers":...
null
118283948
1102.3237
2011-02-16
Improved constraints on cosmological parameters from SNIa data
We present a new method based on a Bayesian hierarchical model to extract constraints on cosmological parameters from SNIa data obtained with the SALT-II lightcurve fitter. We demonstrate with simulated data sets that our method delivers tighter statistical constraints on the cosmological parameters over 90% of the tim...
[ "astro-ph.CO" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14690829
1102.3289
2011-02-16
Belief propagation for joint sparse recovery
Compressed sensing (CS) demonstrates that sparse signals can be recovered from underdetermined linear measurements. We focus on the joint sparse recovery problem where multiple signals share the same common sparse support sets, and they are measured through the same sensing matrix. Leveraging a recent information theor...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119573597
1102.3377
2011-02-16
A note on the cone conjecture for K3 surfaces in positive characteristic
We prove that, for a K3 surface in characteristic p > 2, the automorphism group acts on the nef cone with a rational polyhedral fundamental domain and on the nodal classes with finitely many orbits. As a consequence, for any non-negative integer g, there are only finitely many linear systems of irreducible curves on th...
[ "math.AG", "math.NT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
2361439
1102.3347
2011-02-16
Sobolev metrics on the manifold of all Riemannian metrics
On the manifold $\Met(M)$ of all Riemannian metrics on a compact manifold $M$ one can consider the natural $L^2$-metric as described first by \cite{Ebin70}. In this paper we consider variants of this metric which in general are of higher order. We derive the geodesic equations, we show that they are well-posed under so...
[ "math.DG", "math.AP" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
14179893
1102.3720
2011-02-17
Low-pass Genomewide Sequencing and Variant Imputation Using Identity-by-descent in an Isolated Human Population
Whole-genome sequencing in an isolated population with few founders directly ascertains variants from the population bottleneck that may be rare elsewhere. In such populations, shared haplotypes allow imputation of variants in unsequenced samples without resorting to statistical methods, as in studies of outbred cohort...
[ "q-bio.GN" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a gusev_1", "name": "Alexander Gusev", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "m shah_31", "name": "Mj Shah", "publication_history": null, "h_index": null, "num_papers": null, "num_...
null
992783
1102.3749
2011-02-17
Approximation Algorithms for Correlated Knapsacks and Non-Martingale Bandits
In the stochastic knapsack problem, we are given a knapsack of size B, and a set of jobs whose sizes and rewards are drawn from a known probability distribution. However, we know the actual size and reward only when the job completes. How should we schedule jobs to maximize the expected total reward? We know O(1)-appro...
[ "cs.DS" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "a gupta_108", "name": "Anupam Gupta", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "r krishnaswamy_1", "name": "Ravishankar Krishnaswamy", "publication_history": null, "h_index": null, "num_p...
null
119218709
1102.3553
2011-02-17
The Generalized Uncertainty Principle in f(R) Gravity for a Charged Black Hole
Using f (R) gravity in the Palatini formularism, the metric for a charged spherically symmetric black hole is derived, taking the Ricci scalar curvature to be constant. The generalized uncertainty principle is then used to calculate the temperature of the resulting black hole, through this the entropy is found correcti...
[ "gr-qc", "hep-th" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "j said_1", "name": "Jackson [\"Levi\"] Said", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "k adami_1", "name": "Kristian [\"Zarb\"] Adami", "publication_history": null, "h_index": null, "num...
null
15937575
1102.3643
2011-02-17
A Constant Factor Approximation Algorithm for Unsplittable Flow on Paths
In the unsplittable flow problem on a path, we are given a capacitated path $P$ and $n$ tasks, each task having a demand, a profit, and start and end vertices. The goal is to compute a maximum profit set of tasks, such that for each edge $e$ of $P$, the total demand of selected tasks that use $e$ does not exceed the ca...
[ "cs.DS" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9300293
1102.3751
2011-02-17
Utility-Privacy Tradeoff in Databases: An Information-theoretic Approach
Ensuring the usefulness of electronic data sources while providing necessary privacy guarantees is an important unsolved problem. This problem drives the need for an analytical framework that can quantify the safety of personally identifiable information (privacy) while still providing a quantifable benefit (utility) t...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "l sankar_1", "name": "L. Sankar", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "s rajagopalan_3", "name": "S. [\"Raj\"] Rajagopalan", "publication_history": null, "h_index": null, "num_papers...
null
628425
1102.3669
2011-02-17
Efficient File Synchronization: a Distributed Source Coding Approach
The problem of reconstructing a source sequence with the presence of decoder side-information that is mis-synchronized to the source due to deletions is studied in a distributed source coding framework. Motivated by practical applications, the deletion process is assumed to be bursty and is modeled by a Markov chain. T...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "n ma_1", "name": "Nan Ma", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "k ramchandran_1", "name": "Kannan Ramchandran", "publication_history": null, "h_index": null, "num_papers": null, ...
null
119238598
1102.3664
2011-02-17
Acceleration, magnetic fluctuations and cross-field transport of energetic electrons in a solar flare loop
Plasma turbulence is thought to be associated with various physical processes involved in solar flares, including magnetic reconnection, particle acceleration and transport. Using Ramaty High Energy Solar Spectroscopic Imager ({\it RHESSI}) observations and the X-ray visibility analysis, we determine the spatial and sp...
[ "astro-ph.SR", "astro-ph.HE", "physics.plasm-ph", "physics.space-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
119107864
1102.3594
2011-02-17
QCD predictions for new variables to study dilepton transverse momenta at hadron colliders
The D0 collaboration has recently introduced new variables, a_T and phi* to more accurately probe the low Q_T domain of Z boson production at hadron colliders than had been previously possible through a direct study of the Q_T distribution. The comparison of such accurate data to precise theoretical predictions from QC...
[ "hep-ph" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7274980
1102.3615
2011-02-17
Measuring Permissiveness in Parity Games: Mean-Payoff Parity Games Revisited
We study nondeterministic strategies in parity games with the aim of computing a most permissive winning strategy. Following earlier work, we measure permissiveness in terms of the average number/weight of transitions blocked by the strategy. Using a translation into mean-payoff parity games, we prove that the problem ...
[ "cs.LO", "cs.GT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
9513431
1102.3690
2011-02-17
SU(2)-invariant spin liquids on the triangular lattice with spinful Majorana excitations
We describe a new class of spin liquids with global SU(2) spin rotation symmetry in spin 1/2 systems on the triangular lattice, which have real Majorana fermion excitations carrying spin S = 1. The simplest translationally-invariant mean-field state on the triangular lattice breaks time-reversal symmetry and is stable ...
[ "cond-mat.str-el" ]
null
[ "target.author.publication_history" ]
[]
[ { "author_id": "r biswas_14", "name": "Rudro [\"R.\"] Biswas", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "l fu_6", "name": "Liang Fu", "publication_history": null, "h_index": null, "num_papers": null, ...
null
119099306
1102.3480
2011-02-17
Finding physics signals with shower deconstruction
We introduce shower deconstruction, a method to look for new physics in a hadronic environment. The method aims to be a full information approach using small jets. It assigns to each event a number chi that is an estimate of the ratio of the probability for a signal process to produce that event to the probability for ...
[ "hep-ph", "hep-ex" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
7949241
1102.3561
2011-02-17
Spatial SINR Games of Base Station Placement and Mobile Association
We study the question of determining locations of base stations that may belong to the same or to competing service providers. We take into account the impact of these decisions on the behavior of intelligent mobile terminals who can connect to the base station that offers the best utility. The signal to interference a...
[ "cs.NI", "cs.GT" ]
null
[ "target.author.publication_history.key_reference" ]
null
null
null
174250
1102.3781
2011-02-18
Search for gravitational waves from binary black hole inspiral, merger and ringdown
We present the first modeled search for gravitational waves using the complete binary black hole gravitational waveform from inspiral through the merger and ringdown for binaries with negligible component spin. We searched approximately 2 years of LIGO data taken between November 2005 and September 2007 for systems wit...
[ "gr-qc" ]
null
[ "target.author.publication_history", "target.author.publication_history.key_reference" ]
[]
[ { "author_id": "t collaboration_1", "name": "The [\"Ligo\",\"Scientific\"] Collaboration", "publication_history": null, "h_index": null, "num_papers": null, "num_citations": null }, { "author_id": "t abadie_1", "name": "the [\"Virgo\",\"Collaboration\",\"J.\"] Abadie", "publi...
null
1159029
1102.3944
2011-02-18
Fixed-length lossy compression in the finite blocklength regime
This paper studies the minimum achievable source coding rate as a function of blocklength $n$ and probability $\epsilon$ that the distortion exceeds a given level $d$. Tight general achievability and converse bounds are derived that hold at arbitrary fixed blocklength. For stationary memoryless sources with separable d...
[ "cs.IT", "math.IT" ]
null
[ "target.author.publication_history.key_reference", "target.key_reference" ]
null
null
null