id stringlengths 9 16 | title stringlengths 4 278 | categories listlengths 1 13 | abstract stringlengths 3 4.08k | filtered_category_membership dict |
|---|---|---|---|---|
1102.0372 | XWeB: the XML Warehouse Benchmark | [
"cs.DB"
] | With the emergence of XML as a standard for representing business data, new decision support applications are being developed. These XML data warehouses aim at supporting On-Line Analytical Processing (OLAP) operations that manipulate irregular XML data. To ensure feasibility of these new tools, important performance i... | {
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1102.0406 | Threshold Saturation on Channels with Memory via Spatial Coupling | [
"cs.IT",
"math.IT"
] | We consider spatially coupled code ensembles. A particular instance are convolutional LDPC ensembles. It was recently shown that, for transmission over the memoryless binary erasure channel, this coupling increases the belief propagation threshold of the ensemble to the maximum a-posteriori threshold of the underlying ... | {
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1102.0424 | Design of Finite-Length Irregular Protograph Codes with Low Error Floors
over the Binary-Input AWGN Channel Using Cyclic Liftings | [
"cs.IT",
"math.IT"
] | We propose a technique to design finite-length irregular low-density parity-check (LDPC) codes over the binary-input additive white Gaussian noise (AWGN) channel with good performance in both the waterfall and the error floor region. The design process starts from a protograph which embodies a desirable degree distribu... | {
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1102.0454 | Evaluation of Three Vision Based Object Perception Methods for a Mobile
Robot | [
"cs.RO"
] | This paper addresses object perception applied to mobile robotics. Being able to perceive semantically meaningful objects in unstructured environments is a key capability in order to make robots suitable to perform high-level tasks in home environments. However, finding a solution for this task is daunting: it requires... | {
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1102.0467 | Delays Induce an Exponential Memory Gap for Rendezvous in Trees | [
"cs.DC",
"cs.RO"
] | The aim of rendezvous in a graph is meeting of two mobile agents at some node of an unknown anonymous connected graph. In this paper, we focus on rendezvous in trees, and, analogously to the efforts that have been made for solving the exploration problem with compact automata, we study the size of memory of mobile agen... | {
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1102.0485 | Design, Implementation and Characterization of a Cooperative
Communications System | [
"cs.IT",
"cs.NI",
"math.IT"
] | Cooperative communications is a class of techniques which seek to improve reliability and throughput in wireless systems by pooling the resources of distributed nodes. While cooperation can occur at different network layers and time scales, physical layer cooperation at symbol time scales offers the largest benefit in ... | {
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1102.0522 | Uncertainty Relations and Sparse Signal Recovery for Pairs of General
Signal Sets | [
"cs.IT",
"math.IT"
] | We present an uncertainty relation for the representation of signals in two different general (possibly redundant or incomplete) signal sets. This uncertainty relation is relevant for the analysis of signals containing two distinct features each of which can be described sparsely in a suitable general signal set. Furth... | {
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1102.0540 | Information theory of massively parallel probe storage channels | [
"cs.IT",
"cs.IR",
"math.IT"
] | Motivated by the concept of probe storage, we study the problem of information retrieval using a large array of N nano-mechanical probes, N ~ 4000. At the nanometer scale it is impossible to avoid errors in the positioning of the array, thus all signals retrieved by the probes of the array at a given sampling moment ar... | {
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1102.0603 | Persistent Robotic Tasks: Monitoring and Sweeping in Changing
Environments | [
"cs.RO",
"math.OC"
] | We present controllers that enable mobile robots to persistently monitor or sweep a changing environment. The changing environment is modeled as a field which grows in locations that are not within range of a robot, and decreases in locations that are within range of a robot. We assume that the robots travel on given c... | {
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1102.0604 | A small-world of weak ties provides optimal global integration of
self-similar modules in functional brain networks | [
"physics.bio-ph",
"cond-mat.stat-mech",
"cs.SI",
"physics.soc-ph",
"q-bio.NC"
] | The human brain is organized in functional modules. Such an organization presents a basic conundrum: modules ought to be sufficiently independent to guarantee functional specialization and sufficiently connected to bind multiple processors for efficient information transfer. It is commonly accepted that small-world arc... | {
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1102.0629 | Time-Varying Graphs and Social Network Analysis: Temporal Indicators and
Metrics | [
"cs.SI",
"cs.AI",
"cs.DC",
"physics.soc-ph"
] | Most instruments - formalisms, concepts, and metrics - for social networks analysis fail to capture their dynamics. Typical systems exhibit different scales of dynamics, ranging from the fine-grain dynamics of interactions (which recently led researchers to consider temporal versions of distance, connectivity, and rela... | {
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1102.0651 | Wikipedia information flow analysis reveals the scale-free architecture
of the Semantic Space | [
"physics.soc-ph",
"cs.IR",
"cs.SI",
"physics.data-an"
] | In this paper we extract the topology of the semantic space in its encyclopedic acception, measuring the semantic flow between the different entries of the largest modern encyclopedia, Wikipedia, and thus creating a directed complex network of semantic flows. Notably at the percolation threshold the semantic space is c... | {
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1102.0674 | Effective Mechanism for Social Recommendation of News | [
"physics.soc-ph",
"cs.SI"
] | Recommendation systems represent an important tool for news distribution on the Internet. In this work we modify a recently proposed social recommendation model in order to deal with no explicit ratings of users on news. The model consists of a network of users which continually adapts in order to achieve an efficient ... | {
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1102.0676 | Architecture of A Scalable Dynamic Parallel WebCrawler with High Speed
Downloadable Capability for a Web Search Engine | [
"cs.IR"
] | Today World Wide Web (WWW) has become a huge ocean of information and it is growing in size everyday. Downloading even a fraction of this mammoth data is like sailing through a huge ocean and it is a challenging task indeed. In order to download a large portion of data from WWW, it has become absolutely essential to ma... | {
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1102.0683 | Volatility made observable at last | [
"q-fin.CP",
"cs.CE",
"q-fin.ST"
] | The Cartier-Perrin theorem, which was published in 1995 and is expressed in the language of nonstandard analysis, permits, for the first time perhaps, a clear-cut mathematical definition of the volatility of a financial asset. It yields as a byproduct a new understanding of the means of returns, of the beta coefficient... | {
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1102.0686 | Towards an axiomatic system for Kolmogorov complexity | [
"cs.IT",
"cs.CC",
"cs.LO",
"math.IT",
"math.LO"
] | In [She82], it is shown that four basic functional properties are enough to characterize plain Kolmogorov complexity, hence obtaining an axiomatic characterization of this notion. In this paper, we try to extend this work, both by looking at alternative axiomatic systems for plain complexity and by considering potentia... | {
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1102.0690 | A New Sum-Rate Outer Bound for Interference Channels with Three
Source-Destination Pairs | [
"cs.IT",
"math.IT"
] | This paper derives a novel sum-rate outer bound for the general memoryless interference channel with three users. The derivation is a generalization of the techniques developed by Kramer and by Etkin et al for the Gaussian two-user channel. For the three-user Gaussian channel the proposed sum-rate outer bound outperfor... | {
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1102.0694 | A Syntactic Classification based Web Page Ranking Algorithm | [
"cs.IR"
] | The existing search engines sometimes give unsatisfactory search result for lack of any categorization of search result. If there is some means to know the preference of user about the search result and rank pages according to that preference, the result will be more useful and accurate to the user. In the present pape... | {
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1102.0695 | A Domain Specific Ontology Based Semantic Web Search Engine | [
"cs.IR"
] | Since its emergence in the 1990s the World Wide Web (WWW) has rapidly evolved into a huge mine of global information and it is growing in size everyday. The presence of huge amount of resources on the Web thus poses a serious problem of accurate search. This is mainly because today's Web is a human-readable Web where i... | {
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1102.0699 | Explore what-if scenarios with SONG: Social Network Write Generator | [
"cs.SI",
"cs.NI",
"physics.soc-ph"
] | Online Social Networks (OSNs) have witnessed a tremendous growth the last few years, becoming a platform for online users to communicate, exchange content and even find employment. The emergence of OSNs has attracted researchers and analysts and much data-driven research has been conducted. However, collecting data-set... | {
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1102.0710 | Universal Communication over Arbitrarily Varying Channels | [
"cs.IT",
"math.IT"
] | We consider the problem of universally communicating over an unknown and arbitrarily varying channel, using feedback. The focus of this paper is on determining the input behavior, and specifically, a prior distribution which is used to randomly generate the codebook. We pose the problem of setting the prior as a sequen... | {
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1102.0714 | An architecture for the evaluation of intelligent systems | [
"cs.AI"
] | One of the main research areas in Artificial Intelligence is the coding of agents (programs) which are able to learn by themselves in any situation. This means that agents must be useful for purposes other than those they were created for, as, for example, playing chess. In this way we try to get closer to the pristine... | {
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1102.0735 | Analyzing the Impact of Visitors on Page Views with Google Analytics | [
"cs.IR"
] | This paper develops a flexible methodology to analyze the effectiveness of different variables on various dependent variables which all are times series and especially shows how to use a time series regression on one of the most important and primary index (page views per visit) on Google analytic and in conjunction it... | {
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1102.0755 | Message and State Cooperation in a Relay Channel When the Relay Has
Strictly Causal State Information | [
"cs.IT",
"math.IT"
] | A state-dependent relay channel is studied in which strictly causal channel state information is available at the relay and no state information is available at the source and destination. Source and relay are connected via two unidirectional out-of-band orthogonal links of finite capacity, and a state-dependent memory... | {
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1102.0768 | Message and State Cooperation in a Relay Channel When Only the Relay
Knows the State | [
"cs.IT",
"math.IT"
] | A state-dependent relay channel is studied in which strictly causal channel state information is available at the relay and no state information is available at the source and destination. The source and the relay are connected via two unidirectional out-of-band orthogonal links of finite capacity, and a state-dependen... | {
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1102.0817 | Natural images from the birthplace of the human eye | [
"q-bio.NC",
"cs.CV"
] | Here we introduce a database of calibrated natural images publicly available through an easy-to-use web interface. Using a Nikon D70 digital SLR camera, we acquired about 5000 six-megapixel images of Okavango Delta of Botswana, a tropical savanna habitat similar to where the human eye is thought to have evolved. Some s... | {
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1102.0831 | Intelligent Semantic Web Search Engines: A Brief Survey | [
"cs.AI"
] | The World Wide Web (WWW) allows the people to share the information (data) from the large database repositories globally. The amount of information grows billions of databases. We need to search the information will specialize tools known generically search engine. There are many of search engines available today, retr... | {
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1102.0836 | EigenNet: A Bayesian hybrid of generative and conditional models for
sparse learning | [
"cs.LG"
] | It is a challenging task to select correlated variables in a high dimensional space. To address this challenge, the elastic net has been developed and successfully applied to many applications. Despite its great success, the elastic net does not explicitly use correlation information embedded in data to select correlat... | {
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1102.0899 | Evidence Feed Forward Hidden Markov Model: A New Type of Hidden Markov
Model | [
"cs.AI",
"cs.CV",
"cs.LG",
"math.NA",
"math.PR"
] | The ability to predict the intentions of people based solely on their visual actions is a skill only performed by humans and animals. The intelligence of current computer algorithms has not reached this level of complexity, but there are several research efforts that are working towards it. With the number of classific... | {
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1102.0902 | Disorder induced phase transition in kinetic models of opinion dynamics | [
"physics.soc-ph",
"cond-mat.stat-mech",
"cs.SI"
] | We propose a model of continuous opinion dynamics, where mutual interactions can be both positive and negative. Different types of distributions for the interactions, all characterized by a single parameter $p$ denoting the fraction of negative interactions, are considered. Results from exact calculation of a discrete ... | {
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1102.0918 | Incentive Compatible Influence Maximization in Social Networks and
Application to Viral Marketing | [
"cs.GT",
"cs.SI",
"physics.soc-ph"
] | Information diffusion and influence maximization are important and extensively studied problems in social networks. Various models and algorithms have been proposed in the literature in the context of the influence maximization problem. A crucial assumption in all these studies is that the influence probabilities are k... | {
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1102.0930 | An Evaluation of Link Neighborhood Lexical Signatures to Rediscover
Missing Web Pages | [
"cs.IR",
"cs.DL",
"cs.SI"
] | For discovering the new URI of a missing web page, lexical signatures, which consist of a small number of words chosen to represent the "aboutness" of a page, have been previously proposed. However, prior methods relied on computing the lexical signature before the page was lost, or using cached or archived versions of... | {
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1102.0952 | Pattern tree-based XOLAP rollup operator for XML complex hierarchies | [
"cs.DB"
] | With the rise of XML as a standard for representing business data, XML data warehousing appears as a suitable solution for decision-support applications. In this context, it is necessary to allow OLAP analyses on XML data cubes. Thus, XQuery extensions are needed. To define a formal framework and allow much-needed perf... | {
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1102.0958 | Quantitative Stability and Optimality Conditions in Convex Semi-Infinite
and Infinite Programming | [
"math.OC",
"cs.SY"
] | This paper concerns parameterized convex infinite (or semi-infinite) inequality systems whose decision variables run over general infinite-dimensional Banach (resp. finite-dimensional) spaces and that are indexed by an arbitrary fixed set T . Parameter perturbations on the right-hand side of the inequalities are measur... | {
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1102.0964 | Structured interference-mitigation in two-hop networks | [
"cs.IT",
"math.IT"
] | We consider two-hop S-R-D Gaussian networks with a source (S), a relay (R) and a destination (D), some of which experience additive interference. This additive interference, which renders the channels state-dependent, is either a) experienced at the destination D and known non-causally at the source S, or b) experience... | {
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1102.0969 | On the Complexity of Newman's Community Finding Approach for Biological
and Social Networks | [
"physics.soc-ph",
"cs.CC",
"cs.DM",
"cs.SI"
] | Given a graph of interactions, a module (also called a community or cluster) is a subset of nodes whose fitness is a function of the statistical significance of the pairwise interactions of nodes in the module. The topic of this paper is a model-based community finding approach, commonly referred to as modularity clust... | {
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1102.0987 | Propagation on networks: an exact alternative perspective | [
"cond-mat.stat-mech",
"cs.SI",
"physics.soc-ph"
] | By generating the specifics of a network structure only when needed (on-the-fly), we derive a simple stochastic process that exactly models the time evolution of susceptible-infectious dynamics on finite-size networks. The small number of dynamical variables of this birth-death Markov process greatly simplifies analyti... | {
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1102.1025 | Deformed Statistics Kullback-Leibler Divergence Minimization within a
Scaled Bregman Framework | [
"cond-mat.stat-mech",
"cs.IT",
"math-ph",
"math.IT",
"math.MP"
] | The generalized Kullback-Leibler divergence (K-Ld) in Tsallis statistics [constrained by the additive duality of generalized statistics (dual generalized K-Ld)] is here reconciled with the theory of Bregman divergences for expectations defined by normal averages, within a measure-theoretic framework. Specifically, it i... | {
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1102.1027 | Collective Classification of Textual Documents by Guided
Self-Organization in T-Cell Cross-Regulation Dynamics | [
"cs.IR",
"cs.AI",
"cs.LG",
"nlin.AO",
"q-bio.OT"
] | We present and study an agent-based model of T-Cell cross-regulation in the adaptive immune system, which we apply to binary classification. Our method expands an existing analytical model of T-cell cross-regulation (Carneiro et al. in Immunol Rev 216(1):48-68, 2007) that was used to study the self-organizing dynamics ... | {
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1102.1038 | Prisoner's Dilemma on Graphs with Large Girth | [
"cs.SI",
"math.PR",
"physics.soc-ph"
] | We study the evolution of cooperation in populations where individuals play prisoner's dilemma on a network. Every node of the network corresponds on an individual choosing whether to cooperate or defect in a repeated game. The players revise their actions by imitating those neighbors who have higher payoffs. We show t... | {
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1102.1064 | A Decade of Database Research Publications | [
"cs.DL",
"cs.DB"
] | We analyze the database research publications of four major core database technology conferences (SIGMOD, VLDB, ICDE, EDBT), two main theoretical database conferences (PODS, ICDT) and three database journals (TODS, VLDB Journal, TKDE) over a period of 10 years (2001 - 2010). Our analysis considers only regular papers a... | {
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1102.1101 | Total variation regularization for fMRI-based prediction of behaviour | [
"cs.CV",
"q-bio.NC"
] | While medical imaging typically provides massive amounts of data, the extraction of relevant information for predictive diagnosis remains a difficult challenge. Functional MRI (fMRI) data, that provide an indirect measure of task-related or spontaneous neuronal activity, are classically analyzed in a mass-univariate pr... | {
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1102.1103 | Compound Outage Probability and Capacity of a Class of Fading MIMO
Channels with Channel Distribution Uncertainty | [
"cs.IT",
"math.IT"
] | Outage probability and capacity of a class of block-fading MIMO channels are considered with partial channel distribution information. Specifically, the channel or its distribution are not known but the latter is known to belong to a class of distributions where each member is within a certain distance (uncertainty) fr... | {
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1102.1107 | Robust Distributed Routing in Dynamical Flow Networks - Part I: Locally
Responsive Policies and Weak Resilience | [
"cs.SY",
"math.CA",
"math.DS",
"math.OC",
"nlin.AO"
] | Robustness of distributed routing policies is studied for dynamical flow networks, with respect to adversarial disturbances that reduce the link flow capacities. A dynamical flow network is modeled as a system of ordinary differential equations derived from mass conservation laws on a directed acyclic graph with a sing... | {
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1102.1111 | Treelicious: a System for Semantically Navigating Tagged Web Pages | [
"cs.IR"
] | Collaborative tagging has emerged as a popular and effective method for organizing and describing pages on the Web. We present Treelicious, a system that allows hierarchical navigation of tagged web pages. Our system enriches the navigational capabilities of standard tagging systems, which typically exploit only popula... | {
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1102.1115 | Adaptive Resource Allocation in Jamming Teams Using Game Theory | [
"cs.GT",
"cs.IT",
"cs.SY",
"math.IT",
"math.OC"
] | In this work, we study the problem of power allocation and adaptive modulation in teams of decision makers. We consider the special case of two teams with each team consisting of two mobile agents. Agents belonging to the same team communicate over wireless ad hoc networks, and they try to split their available power b... | {
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1102.1140 | Ranking-Based Black-Box Complexity | [
"cs.NE",
"cs.CC",
"cs.DS"
] | Randomized search heuristics such as evolutionary algorithms, simulated annealing, and ant colony optimization are a broadly used class of general-purpose algorithms. Analyzing them via classical methods of theoretical computer science is a growing field. While several strong runtime analysis results have appeared in t... | {
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} |
1102.1165 | Achievable Rate Region for Multiple Access Channel with Correlated
Channel States and Cooperating Encoders | [
"cs.IT",
"math.IT"
] | In this paper, a two-user discrete memoryless multiple-access channel (DM-MAC) with correlated channel states, each known at one of the encoders is considered, in which each encoder transmits independent messages and tries to cooperate with the other one. To consider cooperating encoders, it is assumed that each encode... | {
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1102.1167 | Seats at the table: the network of the editorial boards in information
and library science | [
"cs.DL",
"cs.SI",
"physics.soc-ph"
] | The structural properties of the network generated by the editorial activities of the members of the boards of "Information Science & Library Science" journals are explored through network analysis techniques. The crossed presence of scholars on editorial boards, the phenomenon called interlocking editorship, is consid... | {
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1102.1168 | Interlocking editorship. A network analysis of the links between
economic journals | [
"cs.DL",
"cs.SI",
"physics.soc-ph"
] | The exploratory analysis developed in this paper relies on the hypothesis that each editor possesses some power in the definition of the editorial policy of her journal. Consequently if the same scholar sits on the board of editors of two journals, those journals could have some common elements in their editorial polic... | {
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1102.1173 | Multi-Parameter Tikhonov Regularization | [
"math.NA",
"cs.SY",
"math.OC"
] | We study multi-parameter Tikhonov regularization, i.e., with multiple penalties. Such models are useful when the sought-for solution exhibits several distinct features simultaneously. Two choice rules, i.e., discrepancy principle and balancing principle, are studied for choosing an appropriate (vector-valued) regulariz... | {
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1102.1182 | Phase transition in the detection of modules in sparse networks | [
"cond-mat.stat-mech",
"cs.LG",
"cs.SI",
"physics.soc-ph"
] | We present an asymptotically exact analysis of the problem of detecting communities in sparse random networks. Our results are also applicable to detection of functional modules, partitions, and colorings in noisy planted models. Using a cavity method analysis, we unveil a phase transition from a region where the origi... | {
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1102.1227 | Exact recoverability from dense corrupted observations via $L_1$
minimization | [
"cs.IT",
"math.IT",
"math.ST",
"stat.TH"
] | This paper confirms a surprising phenomenon first observed by Wright \textit{et al.} \cite{WYGSM_Face_2009_J} \cite{WM_denseError_2010_J} under different setting: given $m$ highly corrupted measurements $y = A_{\Omega \bullet} x^{\star} + e^{\star}$, where $A_{\Omega \bullet}$ is a submatrix whose rows are selected uni... | {
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1102.1231 | Cramer-Rao Bound for Blind Channel Estimators in Redundant Block
Transmission Systems | [
"cs.IT",
"math.IT"
] | In this paper, we derive the Cramer-Rao bound (CRB) for blind channel estimation in redundant block transmission systems, a lower bound for the mean squared error of any blind channel estimators. The derived CRB is valid for any full-rank linear redundant precoder, including both zero-padded (ZP) and cyclic-prefixed (C... | {
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1102.1232 | Asymptotic Spectral Efficiency of the Uplink in Spatially Distributed
Wireless Networks With Multi-Antenna Base Stations | [
"cs.IT",
"math.IT"
] | The spectral efficiency of a representative uplink of a given length, in interference-limited, spatially-distributed wireless networks with hexagonal cells, simple power control, and multiantenna linear Minimum-Mean-Square-Error receivers is found to approach an asymptote as the numbers of base-station antennas N and w... | {
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1102.1247 | Randomness and dependencies extraction via polarization, with
applications to Slepian-Wolf coding and secrecy | [
"cs.IT",
"math.IT"
] | The polarization phenomenon for a single source is extended to a framework with multiple correlated sources. It is shown in addition to extracting the randomness of the source, the polar transforms takes the original arbitrary dependencies to extremal dependencies. Polar coding schemes for the Slepian-Wolf problem and ... | {
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1102.1249 | Compressible Distributions for High-dimensional Statistics | [
"math.ST",
"cs.IT",
"math.IT",
"stat.TH"
] | We develop a principled way of identifying probability distributions whose independent and identically distributed (iid) realizations are compressible, i.e., can be well-approximated as sparse. We focus on Gaussian random underdetermined linear regression (GULR) problems, where compressibility is known to ensure the su... | {
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1102.1256 | Stochastic Optimal Multi-Modes Switching with a Viscosity Solution
Approach | [
"math.OC",
"cs.SY",
"math.PR"
] | We consider the problem of optimal multi-modes switching in finite horizon, when the state of the system, including the switching cost functions are arbitrary ($g_{ij}(t,x)\geq 0$). We show existence of the optimal strategy, and give when the optimal strategy is finite via a verification theorem. Finally, when the stat... | {
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1102.1261 | Symmetry in behavior of complex social systems - discussion of models of
crowd evacuation organized in agreement with symmetry conditions | [
"cs.MA"
] | The evacuation of football stadium scenarios are discussed as model realizing ordered states, described as movements of individuals according to fields of displacements, calculated correspondingly to given scenario. The symmetry of the evacuation space is taken into account in calculation of displacements field - the d... | {
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1102.1265 | Sphere decoding complexity exponent for decoding full rate codes over
the quasi-static MIMO channel | [
"cs.IT",
"math.IT"
] | In the setting of quasi-static multiple-input multiple-output (MIMO) channels, we consider the high signal-to-noise ratio (SNR) asymptotic complexity required by the sphere decoding (SD) algorithm for decoding a large class of full rate linear space-time codes. With SD complexity having random fluctuations induced by t... | {
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1102.1292 | Modeling Dynamic Swarms | [
"cs.CV"
] | This paper proposes the problem of modeling video sequences of dynamic swarms (DS). We define DS as a large layout of stochastically repetitive spatial configurations of dynamic objects (swarm elements) whose motions exhibit local spatiotemporal interdependency and stationarity, i.e., the motions are similar in any sma... | {
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1102.1324 | Refinement of Operator-valued Reproducing Kernels | [
"cs.LG",
"math.FA"
] | This paper studies the construction of a refinement kernel for a given operator-valued reproducing kernel such that the vector-valued reproducing kernel Hilbert space of the refinement kernel contains that of the given one as a subspace. The study is motivated from the need of updating the current operator-valued repro... | {
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1102.1345 | Introducing a New Mechanism for Construction of an Efficient Search
Model | [
"cs.IR"
] | Search engine has become an inevitable tool for retrieving information from the WWW. Web researchers introduce lots of algorithms to modify search engine based on different features. Sometimes those algorithms are domain related, sometimes they are Web page ranking related, and sometimes they are efficiency related and... | {
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1102.1379 | Structural and functional networks in complex systems with delay | [
"cond-mat.dis-nn",
"cs.SI",
"physics.soc-ph"
] | Functional networks of complex systems are obtained from the analysis of the temporal activity of their components, and are often used to infer their unknown underlying connectivity. We obtain the equations relating topology and function in a system of diffusively delay-coupled elements in complex networks. We solve ex... | {
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1102.1398 | Efficient Bayesian Social Learning on Trees | [
"cs.SI",
"cs.GT",
"cs.MA"
] | We consider a set of agents who are attempting to iteratively learn the 'state of the world' from their neighbors in a social network. Each agent initially receives a noisy observation of the true state of the world. The agents then repeatedly 'vote' and observe the votes of some of their peers, from which they gain mo... | {
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1102.1407 | Stable Parallel Looped Systems -- A New Theoretical Framework for the
Evolution of Order | [
"cs.NE",
"nlin.AO"
] | The objective of the paper is to identify laws and mechanisms that allow the creation of more order from disorder using natural means i.e., without the help of conscious beings. While this is not possible for the collection of all dynamical systems as it violates the second law of thermodynamics, I show that this is po... | {
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1102.1441 | Generating Probability Distributions using Multivalued Stochastic Relay
Circuits | [
"cs.IT",
"cs.DM",
"math.IT"
] | The problem of random number generation dates back to von Neumann's work in 1951. Since then, many algorithms have been developed for generating unbiased bits from complex correlated sources as well as for generating arbitrary distributions from unbiased bits. An equally interesting, but less studied aspect is the stru... | {
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1102.1462 | Diversity of MMSE MIMO Receivers | [
"cs.IT",
"math.IT"
] | In most MIMO systems, the family of waterfall error curves, calculated at different spectral efficiencies, are asymptotically parallel at high SNR. In other words, most MIMO systems exhibit a single diversity value for all fixed rates. The MIMO MMSE receiver does not follow this pattern and exhibits a varying diversity... | {
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1102.1465 | An Introduction to Artificial Prediction Markets for Classification | [
"stat.ML",
"cs.LG",
"math.ST",
"stat.TH"
] | Prediction markets are used in real life to predict outcomes of interest such as presidential elections. This paper presents a mathematical theory of artificial prediction markets for supervised learning of conditional probability estimators. The artificial prediction market is a novel method for fusing the prediction ... | {
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1102.1466 | Distributed Throughput-optimal Scheduling in Ad Hoc Wireless Networks | [
"cs.IT",
"math.IT"
] | In this paper, we propose a distributed throughput-optimal ad hoc wireless network scheduling algorithm, which is motivated by the celebrated simplex algorithm for solving linear programming (LP) problems. The scheduler stores a sparse set of basic schedules, and chooses the max-weight basic schedule for transmission i... | {
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1102.1475 | Security Embedding Codes | [
"cs.IT",
"math.IT"
] | This paper considers the problem of simultaneously communicating two messages, a high-security message and a low-security message, to a legitimate receiver, referred to as the security embedding problem. An information-theoretic formulation of the problem is presented. A coding scheme that combines rate splitting, supe... | {
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1102.1480 | Joint Decoding of LDPC Codes and Finite-State Channels via
Linear-Programming | [
"cs.IT",
"math.IT"
] | This paper considers the joint-decoding (JD) problem for finite-state channels (FSCs) and low-density parity-check (LDPC) codes. In the first part, the linear-programming (LP) decoder for binary linear codes is extended to JD of binary-input FSCs. In particular, we provide a rigorous definition of LP joint-decoding pse... | {
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1102.1487 | Rumor Evolution in Social Networks | [
"physics.soc-ph",
"cs.SI"
] | Social network is a main tunnel of rumor spreading. Previous studies are concentrated on a static rumor spreading. The content of the rumor is invariable during the whole spreading process. Indeed, the rumor evolves constantly in its spreading process, which grows shorter, more concise, more easily grasped and told. In... | {
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1102.1497 | Belief Propagation for Error Correcting Codes and Lossy Compression
Using Multilayer Perceptrons | [
"cs.IT",
"math.IT",
"physics.data-an"
] | The belief propagation (BP) based algorithm is investigated as a potential decoder for both of error correcting codes and lossy compression, which are based on non-monotonic tree-like multilayer perceptron encoders. We discuss that whether the BP can give practical algorithms or not in these schemes. The BP implementat... | {
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1102.1498 | On Rate-Splitting by a Secondary Link in Multiple Access Primary Network | [
"cs.IT",
"math.IT"
] | An achievable rate region is obtained for a primary multiple access network coexisting with a secondary link of one transmitter and a corresponding receiver. The rate region depicts the sum primary rate versus the secondary rate and is established assuming that the secondary link performs rate-splitting. The achievable... | {
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1102.1502 | On the Statistics and Predictability of Go-Arounds | [
"cs.SY"
] | This paper takes an empirical approach to identify operational factors at busy airports that may predate go-around maneuvers. Using four years of data from San Francisco International Airport, we begin our investigation with a statistical approach to investigate which features of airborne, ground operations (e.g., numb... | {
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1102.1503 | Peer-to-Peer Multimedia Sharing based on Social Norms | [
"cs.MM",
"cs.SI"
] | Empirical data shows that in the absence of incentives, a peer participating in a Peer-to-Peer (P2P) network wishes to free-riding. Most solutions for providing incentives in P2P networks are based on direct reciprocity, which are not appropriate for most P2P multimedia sharing networks due to the unique features exhib... | {
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1102.1507 | Generalized Measures of Information Transfer | [
"physics.data-an",
"cs.IT",
"math.DS",
"math.IT"
] | Transfer entropy provides a general tool for analyzing the magnitudes and directions---but not the \emph{kinds}---of information transfer in a system. We extend transfer entropy in two complementary ways. First, we distinguish state-dependent from state-independent transfer, based on whether a source's influence depend... | {
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1102.1536 | Evolutionary multiobjective optimization of the multi-location
transshipment problem | [
"cs.AI",
"math.OC"
] | We consider a multi-location inventory system where inventory choices at each location are centrally coordinated. Lateral transshipments are allowed as recourse actions within the same echelon in the inventory system to reduce costs and improve service level. However, this transshipment process usually causes undesirab... | {
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} |
1102.1552 | Multiuser Diversity in Downlink Channels: When does the Feedback Cost
Outweigh the Spectral Efficiency Gain? | [
"cs.IT",
"math.IT"
] | In this paper, we perform a cost-benefit analysis of multiuser diversity in single antenna broadcast channels. It is well known that multiuser diversity can be beneficial but there is a significant cost associated with acquiring instantaneous CSI. We perform a cost-benefit analysis of multiuser diversity for 2 types of... | {
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1102.1609 | Exact Minimum-Repair-Bandwidth Cooperative Regenerating Codes for
Distributed Storage Systems | [
"cs.IT",
"cs.DC",
"math.IT"
] | In order to provide high data reliability, distributed storage systems disperse data with redundancy to multiple storage nodes. Regenerating codes is a new class of erasure codes to introduce redundancy for the purpose of improving the data repair performance in distributed storage. Most of the studies on regenerating ... | {
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1102.1621 | Recovery of Sparsely Corrupted Signals | [
"cs.IT",
"math.IT"
] | We investigate the recovery of signals exhibiting a sparse representation in a general (i.e., possibly redundant or incomplete) dictionary that are corrupted by additive noise admitting a sparse representation in another general dictionary. This setup covers a wide range of applications, such as image inpainting, super... | {
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1102.1660 | ATC Taskload Inherent to the Geometry of Stochastic 4-D Trajectory Flows
with Flight Technical Errors | [
"cs.SY"
] | A method to quantify the probabilistic controller taskload inherent to maintaining aircraft adherence to 4-D trajectories within flow corridors is presented. An Ornstein-Uhlenbeck model of the aircraft motion and a Poisson model of the flow scheduling are introduced along with reasonable numerical values of the model p... | {
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1102.1691 | Schema Redescription in Cellular Automata: Revisiting Emergence in
Complex Systems | [
"nlin.CG",
"cs.AI",
"cs.FL",
"cs.NE",
"q-bio.QM"
] | We present a method to eliminate redundancy in the transition tables of Boolean automata: schema redescription with two symbols. One symbol is used to capture redundancy of individual input variables, and another to capture permutability in sets of input variables: fully characterizing the canalization present in Boole... | {
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1102.1745 | Restructuring in Combinatorial Optimization | [
"cs.DS",
"cs.AI",
"math.CO",
"math.OC"
] | The paper addresses a new class of combinatorial problems which consist in restructuring of solutions (as structures) in combinatorial optimization. Two main features of the restructuring process are examined: (i) a cost of the restructuring, (ii) a closeness to a goal solution. This problem corresponds to redesign (im... | {
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1102.1747 | Graph Coalition Structure Generation | [
"cs.DS",
"cs.AI",
"cs.CC",
"cs.GT",
"cs.MA"
] | We give the first analysis of the computational complexity of {\it coalition structure generation over graphs}. Given an undirected graph $G=(N,E)$ and a valuation function $v:2^N\rightarrow\RR$ over the subsets of nodes, the problem is to find a partition of $N$ into connected subsets, that maximises the sum of the co... | {
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} |
1102.1753 | Predictors of short-term decay of cell phone contacts in a large scale
communication network | [
"cs.SI",
"physics.soc-ph",
"stat.ML"
] | Under what conditions is an edge present in a social network at time t likely to decay or persist by some future time t + Delta(t)? Previous research addressing this issue suggests that the network range of the people involved in the edge, the extent to which the edge is embedded in a surrounding structure, and the age... | {
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1102.1782 | On network coding for acyclic networks with delays | [
"cs.IT",
"math.IT"
] | Problems related to network coding for acyclic, instantaneous networks (where the edges of the acyclic graph representing the network are assumed to have zero-delay) have been extensively dealt with in the recent past. The most prominent of these problems include (a) the existence of network codes that achieve maximum ... | {
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1102.1789 | Extreme events on complex networks | [
"cond-mat.stat-mech",
"cs.SI",
"physics.soc-ph"
] | We study the extreme events taking place on complex networks. The transport on networks is modelled using random walks and we compute the probability for the occurance and recurrence of extreme events on the network. We show that the nodes with smaller number of links are more prone to extreme events than the ones with... | {
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"cs.NE": 0,
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"cs.SI": 1,
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} |
1102.1803 | Proposing LT based Search in PDM Systems for Better Information
Retrieval | [
"cs.IR",
"cs.AI"
] | PDM Systems contain and manage heavy amount of data but the search mechanism of most of the systems is not intelligent which can process user"s natural language based queries to extract desired information. Currently available search mechanisms in almost all of the PDM systems are not very efficient and based on old wa... | {
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} |
1102.1808 | From Machine Learning to Machine Reasoning | [
"cs.AI",
"cs.LG"
] | A plausible definition of "reasoning" could be "algebraically manipulating previously acquired knowledge in order to answer a new question". This definition covers first-order logical inference or probabilistic inference. It also includes much simpler manipulations commonly used to build large learning systems. For ins... | {
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} |
1102.1820 | Optimal Synthesis for Nonholonomic Vehicles With Constrained Side
Sensors | [
"cs.RO"
] | We present a complete characterization of shortest paths to a goal position for a vehicle with unicycle kinematics and a limited range sensor, constantly keeping a given landmark in sight. Previous work on this subject studied the optimal paths in case of a frontal, symmetrically limited Field--Of--View (FOV). In this ... | {
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} |
1102.1889 | Ologs: a categorical framework for knowledge representation | [
"cs.LO",
"cs.AI",
"math.CT"
] | In this paper we introduce the olog, or ontology log, a category-theoretic model for knowledge representation (KR). Grounded in formal mathematics, ologs can be rigorously formulated and cross-compared in ways that other KR models (such as semantic networks) cannot. An olog is similar to a relational database schema; i... | {
"Other": 1,
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} |
1102.1929 | Suppressing Epidemics with a Limited Amount of Immunization Units | [
"physics.soc-ph",
"cond-mat.stat-mech",
"cs.SI"
] | The way diseases spread through schools, epidemics through countries, and viruses through the Internet is crucial in determining their risk. Although each of these threats has its own characteristics, its underlying network determines the spreading. To restrain the spreading, a widely used approach is the fragmentation... | {
"Other": 0,
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} |
1102.1959 | Distributed Uplink Resource Allocation in Cognitive Radio Networks --
Part I: Equilibria and Algorithms for Power Allocation | [
"cs.IT",
"math.IT"
] | Spectrum management has been identified as a crucial step towards enabling the technology of a cognitive radio network (CRN). Most of the current works dealing with spectrum management in the CRN focus on a single task of the problem, e.g., spectrum sensing, spectrum decision, spectrum sharing or spectrum mobility. In ... | {
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} |
1102.1960 | Averaged Iterative Water-Filling Algorithm: Robustness and Convergence | [
"cs.IT",
"math.IT"
] | The convergence properties of the Iterative water-filling (IWF) based algorithms have been derived in the ideal situation where the transmitters in the network are able to obtain the exact value of the interference plus noise (IPN) experienced at the corresponding receivers in each iteration of the algorithm. However, ... | {
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} |
1102.1963 | On quantum limit of optical communications: concatenated codes and
joint-detection receivers | [
"quant-ph",
"cs.IT",
"math.IT"
] | When classical information is sent over a channel with quantum-state modulation alphabet, such as the free-space optical (FSO) channel, attaining the ultimate (Holevo) limit to channel capacity requires the receiver to make joint measurements over long codeword blocks. In recent work, we showed a receiver for a pure-st... | {
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} |
1102.1965 | Distributed Uplink Resource Allocation in Cognitive Radio Networks --
Part II: Equilibria and Algorithms for Joint Access Point Selection and Power
Allocation | [
"cs.IT",
"math.IT"
] | In the first part of this paper, we have studied solely the spectrum sharing aspect of the above problem, and proposed algorithms for the CUs in the single AP network to efficiently share the spectrum. In this second part of the paper, we build upon our previous understanding of the single AP network, and formulate the... | {
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} |
1102.1985 | What Stops Social Epidemics? | [
"cs.SI",
"physics.soc-ph"
] | Theoretical progress in understanding the dynamics of spreading processes on graphs suggests the existence of an epidemic threshold below which no epidemics form and above which epidemics spread to a significant fraction of the graph. We have observed information cascades on the social media site Digg that spread fast ... | {
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} |
1102.2017 | Synthesis of Mechanism for single- and hybrid-tasks using Differential
Evolution | [
"cs.CE"
] | The optimal dimensional synthesis for planar mechanisms using differential evolution (DE) is demonstrated. Four examples are included: in the first case, the synthesis of a mechanism for hybrid-tasks, considering path generation, function generation, and motion generation, is carried out. The second and third cases per... | {
"Other": 0,
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} |
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