id stringlengths 9 16 | title stringlengths 4 278 | categories listlengths 1 13 | abstract stringlengths 3 4.08k | filtered_category_membership dict |
|---|---|---|---|---|
1105.3347 | Generating Scale-free Networks with Adjustable Clustering Coefficient
Via Random Walks | [
"physics.soc-ph",
"cs.SI"
] | This paper presents an algorithm for generating scale-free networks with adjustable clustering coefficient. The algorithm is based on a random walk procedure combined with a triangle generation scheme which takes into account genetic factors; this way, preferential attachment and clustering control are implemented usin... | {
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1105.3351 | Splitting method for spatio-temporal search efforts planning | [
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] | This article deals with the spatio-temporal sensors deployment in order to maximize detection probability of an intelligent and randomly moving target in an area under surveillance. Our work is based on the rare events simulation framework. More precisely, we derive a novel stochastic optimization algorithm based on th... | {
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1105.3368 | Random Walks, Electric Networks and The Transience Class problem of
Sandpiles | [
"cs.DM",
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"cs.SI",
"math-ph",
"math.MP"
] | The Abelian Sandpile Model is a discrete diffusion process defined on graphs (Dhar \cite{DD90}, Dhar et al. \cite{DD95}) which serves as the standard model of \textit{self-organized criticality}. The transience class of a sandpile is defined as the maximum number of particles that can be added without making the system... | {
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1105.3416 | Implementation of Physical-layer Network Coding | [
"cs.NI",
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"math.IT"
] | This paper presents the first implementation of a two-way relay network based on the principle of physical-layer network coding. To date, only a simplified version of physical-layer network coding (PNC) method, called analog network coding (ANC), has been successfully implemented. The advantage of ANC is that it is sim... | {
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1105.3424 | Competing epidemics on complex networks | [
"physics.soc-ph",
"cond-mat.stat-mech",
"cs.SI"
] | Human diseases spread over networks of contacts between individuals and a substantial body of recent research has focused on the dynamics of the spreading process. Here we examine a model of two competing diseases spreading over the same network at the same time, where infection with either disease gives an individual ... | {
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1105.3425 | Delays and the Capacity of Continuous-time Channels | [
"cs.IT",
"math.IT"
] | Any physical channel of communication offers two potential reasons why its capacity (the number of bits it can transmit in a unit of time) might be unbounded: (1) Infinitely many choices of signal strength at any given instant of time, and (2) Infinitely many instances of time at which signals may be sent. However chan... | {
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1105.3427 | Real-Time Sequential Convex Programming for Optimal Control Applications | [
"math.OC",
"cs.SY"
] | This paper proposes real-time sequential convex programming (RTSCP), a method for solving a sequence of nonlinear optimization problems depending on an online parameter. We provide a contraction estimate for the proposed method and, as a byproduct, a new proof of the local convergence of sequential convex programming. ... | {
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1105.3435 | Visibility-preserving convexifications using single-vertex moves | [
"cs.CG",
"cs.RO",
"math.CO"
] | Devadoss asked: (1) can every polygon be convexified so that no internal visibility (between vertices) is lost in the process? Moreover, (2) does such a convexification exist, in which exactly one vertex is moved at a time (that is, using {\em single-vertex moves})? We prove the redundancy of the "single-vertex moves" ... | {
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1105.3486 | Xapagy: a cognitive architecture for narrative reasoning | [
"cs.AI"
] | We introduce the Xapagy cognitive architecture: a software system designed to perform narrative reasoning. The architecture has been designed from scratch to model and mimic the activities performed by humans when witnessing, reading, recalling, narrating and talking about stories. | {
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1105.3531 | On the Tradeoff Between Multiuser Diversity and Training Overhead in
Multiple Access Channels | [
"cs.IT",
"math.IT"
] | We consider a single antenna narrowband multiple access channel in which users send training sequences to the base station and scheduling is performed based on minimum mean square error (MMSE) channel estimates. In such a system, there is an inherent tradeoff between training overhead and the amount of multiuser divers... | {
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1105.3538 | The Exact Schema Theorem | [
"cs.NE"
] | A schema is a naturally defined subset of the space of fixed-length binary strings. The Holland Schema Theorem gives a lower bound on the expected fraction of a population in a schema after one generation of a simple genetic algorithm. This paper gives formulas for the exact expected fraction of a population in a schem... | {
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1105.3559 | Invariant Representative Cocycles of Cohomology Generators using
Irregular Graph Pyramids | [
"cs.CV"
] | Structural pattern recognition describes and classifies data based on the relationships of features and parts. Topological invariants, like the Euler number, characterize the structure of objects of any dimension. Cohomology can provide more refined algebraic invariants to a topological space than does homology. It ass... | {
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1105.3569 | Diversity-multiplexing Gain Tradeoff: a Tool in Algebra? | [
"cs.IT",
"math.IT"
] | Since the invention of space-time coding numerous algebraic methods have been applied in code design. In particular algebraic number theory and central simple algebras have been on the forefront of the research. In this paper we are turning the table and asking whether information theory can be used as a tool in al... | {
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1105.3574 | Robustness and Assortativity for Diffusion-like Processes in Scale-free
Networks | [
"physics.soc-ph",
"cond-mat.dis-nn",
"cond-mat.stat-mech",
"cs.SI"
] | By analysing the diffusive dynamics of epidemics and of distress in complex networks, we study the effect of the assortativity on the robustness of the networks. We first determine by spectral analysis the thresholds above which epidemics/failures can spread; we then calculate the slowest diffusional times. Our results... | {
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1105.3617 | Face Shape and Reflectance Acquisition using a Multispectral Light Stage | [
"cs.CV",
"cs.GR"
] | In this thesis, we discuss the design and calibration (geometric and radiometric) of a novel shape and reflectance acquisition device called the "Multispectral Light Stage". This device can capture highly detailed facial geometry (down to the level of skin pores detail) and Multispectral reflectance map which can be us... | {
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1105.3635 | Probabilistic Inference from Arbitrary Uncertainty using Mixtures of
Factorized Generalized Gaussians | [
"cs.AI"
] | This paper presents a general and efficient framework for probabilistic inference and learning from arbitrary uncertain information. It exploits the calculation properties of finite mixture models, conjugate families and factorization. Both the joint probability density of the variables and the likelihood function of t... | {
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1105.3682 | Where are my followers? Understanding the Locality Effect in Twitter | [
"cs.SI",
"physics.soc-ph"
] | Twitter is one of the most used applications in the current Internet with more than 200M accounts created so far. As other large-scale systems Twitter can obtain enefit by exploiting the Locality effect existing among its users. In this paper we perform the first comprehensive study of the Locality effect of Twitter. F... | {
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1105.3685 | Benchmarks, Performance Evaluation and Contests for 3D Shape Retrieval | [
"cs.CV",
"cs.CG"
] | Benchmarking of 3D Shape retrieval allows developers and researchers to compare the strengths of different algorithms on a standard dataset. Here we describe the procedures involved in developing a benchmark and issues involved. We then discuss some of the current 3D shape retrieval benchmarks efforts of our group and ... | {
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1105.3686 | Broadcast Channels with Delayed Finite-Rate Feedback: Predict or
Observe? | [
"cs.IT",
"math.IT"
] | Most multiuser precoding techniques require accurate transmitter channel state information (CSIT) to maintain orthogonality between the users. Such techniques have proven quite fragile in time-varying channels because the CSIT is inherently imperfect due to estimation and feedback delay, as well quantization noise. An ... | {
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1105.3726 | Controlling Complex Networks with Compensatory Perturbations | [
"q-bio.MN",
"cond-mat.dis-nn",
"cs.SI",
"nlin.CD",
"physics.soc-ph"
] | The response of complex networks to perturbations is of utmost importance in areas as diverse as ecosystem management, emergency response, and cell reprogramming. A fundamental property of networks is that the perturbation of one node can affect other nodes, in a process that may cause the entire or substantial part of... | {
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1105.3788 | A Control-Oriented Notion of Finite State Approximation | [
"math.OC",
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] | We consider the problem of approximating discrete-time plants with finite-valued sensors and actu- ators by deterministic finite memory systems for the purpose of certified-by-design controller synthesis. Building on ideas from robust control, we propose a control-oriented notion of finite state approximation for these... | {
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1105.3793 | A lower bound on the average entropy of a function determined up to a
diagonal linear map on F_q^n | [
"math.CO",
"cs.IT",
"math.IT"
] | In this note, it is shown that if $f\colon\efq^n\to\efq^n$ is any function and $\bA=(A_1,..., A_n)$ is uniformly distributed over $\efq^n$, then the average over $(k_1,...,k_n)\in \efq^n$ of the Renyi (and hence, of the Shannon) entropy of $f(\bA)+(k_1A_1,...,k_nA_n)$ is at least about $\log_2(q^n)-n$. In fact, it is s... | {
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1105.3821 | Ontological Crises in Artificial Agents' Value Systems | [
"cs.AI"
] | Decision-theoretic agents predict and evaluate the results of their actions using a model, or ontology, of their environment. An agent's goal, or utility function, may also be specified in terms of the states of, or entities within, its ontology. If the agent may upgrade or replace its ontology, it faces a crisis: the ... | {
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1105.3828 | An Algorithmic Solution to the Five-Point Pose Problem Based on the
Cayley Representation of Rotations | [
"cs.CV"
] | We give a new algorithmic solution to the well-known five-point relative pose problem. Our approach does not deal with the famous cubic constraint on an essential matrix. Instead, we use the Cayley representation of rotations in order to obtain a polynomial system from epipolar constraints. Solving that system, we dire... | {
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1105.3829 | Hierarchical Recursive Running Median | [
"cs.DS",
"cs.CV"
] | To date, the histogram-based running median filter of Perreault and H\'ebert is considered the fastest for 8-bit images, being roughly O(1) in average case. We present here another approximately constant time algorithm which further improves the aforementioned one and exhibits lower associated constant, being at the ti... | {
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1105.3833 | Typical models: minimizing false beliefs | [
"cs.AI"
] | A knowledge system S describing a part of real world does in general not contain complete information. Reasoning with incomplete information is prone to errors since any belief derived from S may be false in the present state of the world. A false belief may suggest wrong decisions and lead to harmful actions. So an im... | {
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1105.3834 | A Multiple-Choice Test Recognition System based on the Gamera Framework | [
"cs.CV"
] | This article describes JECT-OMR, a system that analyzes digital images representing scans of multiple-choice tests compiled by students. The system performs a structural analysis of the document in order to get the chosen answer for each question, and it also contains a bar-code decoder, used for the identification of ... | {
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1105.3835 | Protocols for Relay-Assisted Free-Space Optical Systems | [
"cs.IT",
"math.IT"
] | We investigate transmission protocols for relay-assisted free-space optical (FSO) systems, when multiple parallel relays are employed and there is no direct link between the source and the destination. As alternatives to all-active FSO relaying, where all the available relays transmit concurrently, we propose schemes t... | {
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1105.3879 | Non-Malleable Codes from the Wire-Tap Channel | [
"cs.CR",
"cs.IT",
"math.IT"
] | Recently, Dziembowski et al. introduced the notion of non-malleable codes (NMC), inspired from the notion of non-malleability in cryptography and the work of Gennaro et al. in 2004 on tamper proof security. Informally, when using NMC, if an attacker modifies a codeword, decoding this modified codeword will return eithe... | {
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1105.3931 | Behavior of Graph Laplacians on Manifolds with Boundary | [
"cs.LG",
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"stat.ML"
] | In manifold learning, algorithms based on graph Laplacians constructed from data have received considerable attention both in practical applications and theoretical analysis. In particular, the convergence of graph Laplacians obtained from sampled data to certain continuous operators has become an active research topic... | {
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1105.4004 | Compressed k2-Triples for Full-In-Memory RDF Engines | [
"cs.IR",
"cs.DB"
] | Current "data deluge" has flooded the Web of Data with very large RDF datasets. They are hosted and queried through SPARQL endpoints which act as nodes of a semantic net built on the principles of the Linked Data project. Although this is a realistic philosophy for global data publishing, its query performance is dimin... | {
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1105.4005 | Link prediction in complex networks: a local na\"{\i}ve Bayes model | [
"physics.soc-ph",
"cs.SI",
"physics.data-an"
] | Common-neighbor-based method is simple yet effective to predict missing links, which assume that two nodes are more likely to be connected if they have more common neighbors. In such method, each common neighbor of two nodes contributes equally to the connection likelihood. In this Letter, we argue that different commo... | {
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1105.4026 | A New Achievable DoF Region for the 3-user MxN Symmetric Interference
Channel | [
"cs.IT",
"math.IT"
] | In this paper, the 3-user multiple-input multiple-output Gaussian interference channel with M antennas at each transmitter and N antennas at each receiver is considered. It is assumed that the channel coefficients are constant and known to all transmitters and receivers. A novel scheme is presented that spans a new ach... | {
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1105.4037 | Mass transportation with LQ cost functions | [
"math.OC",
"cs.SY"
] | We study the optimal transport problem in the Euclidean space where the cost function is given by the value function associated with a Linear Quadratic minimization problem. Under appropriate assumptions, we generalize Brenier's Theorem proving existence and uniqueness of an optimal transport map. In the controllable c... | {
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1105.4042 | Adaptive and optimal online linear regression on $\ell^1$-balls | [
"stat.ML",
"cs.LG",
"math.ST",
"stat.TH"
] | We consider the problem of online linear regression on individual sequences. The goal in this paper is for the forecaster to output sequential predictions which are, after $T$ time rounds, almost as good as the ones output by the best linear predictor in a given $\ell^1$-ball in $\\R^d$. We consider both the cases wher... | {
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1105.4044 | Turnover Rate of Popularity Charts in Neutral Models | [
"physics.soc-ph",
"cs.SI"
] | It has been shown recently that in many different cultural phenomena the turnover rate on the most popular artefacts in a population exhibit some regularities. A very simple expression for this turnover rate has been proposed by Bentley et al. and its validity in two simple models for copying and innovation is investig... | {
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1105.4058 | Human Identity Verification based on Heart Sounds: Recent Advances and
Future Directions | [
"cs.CV",
"stat.AP"
] | Identity verification is an increasingly important process in our daily lives, and biometric recognition is a natural solution to the authentication problem. One of the most important research directions in the field of biometrics is the characterization of novel biometric traits that can be used in conjunction with ... | {
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1105.4082 | Emergent velocity agreement in robot networks | [
"cs.NI",
"cs.RO"
] | In this paper we propose and prove correct a new self-stabilizing velocity agreement (flocking) algorithm for oblivious and asynchronous robot networks. Our algorithm allows a flock of uniform robots to follow a flock head emergent during the computation whatever its direction in plane. Robots are asynchronous, oblivio... | {
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1105.4143 | Opportunities for Network Coding: To Wait or Not to Wait | [
"math.OC",
"cs.IT",
"cs.NI",
"math.IT"
] | It has been well established that wireless network coding can significantly improve the efficiency of multi-hop wireless networks. However, in a stochastic environment some of the packets might not have coding pairs, which limits the number of available coding opportunities. In this context, an important decision is wh... | {
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1105.4183 | Cubical Cohomology Ring of 3D Photographs | [
"cs.CV"
] | Cohomology and cohomology ring of three-dimensional (3D) objects are topological invariants that characterize holes and their relations. Cohomology ring has been traditionally computed on simplicial complexes. Nevertheless, cubical complexes deal directly with the voxels in 3D images, no additional triangulation is nec... | {
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1105.4204 | Fast O(1) bilateral filtering using trigonometric range kernels | [
"cs.CV",
"cs.CE",
"cs.DC",
"cs.DS"
] | It is well-known that spatial averaging can be realized (in space or frequency domain) using algorithms whose complexity does not depend on the size or shape of the filter. These fast algorithms are generally referred to as constant-time or O(1) algorithms in the image processing literature. Along with the spatial filt... | {
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1105.4206 | Spatial Intercell Interference Cancellation with CSI Training and
Feedback | [
"cs.IT",
"math.IT"
] | We investigate intercell interference cancellation (ICIC) with a practical downlink training and uplink channel state information (CSI) feedback model. The average downlink throughput for such a 2-cell network is derived. The user location has a strong effect on the signal-to-interference ratio (SIR) and the channel es... | {
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1105.4224 | On A Semi-Automatic Method for Generating Composition Tables | [
"cs.AI",
"cs.LO"
] | Originating from Allen's Interval Algebra, composition-based reasoning has been widely acknowledged as the most popular reasoning technique in qualitative spatial and temporal reasoning. Given a qualitative calculus (i.e. a relation model), the first thing we should do is to establish its composition table (CT). In the... | {
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1105.4251 | Synthesizing Products for Online Catalogs | [
"cs.DB"
] | A high-quality, comprehensive product catalog is essential to the success of Product Search engines and shopping sites such as Yahoo! Shopping, Google Product Search or Bing Shopping. But keeping catalogs up-to-date becomes a challenging task, calling for the need of automated techniques. In this paper, we introduce th... | {
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1105.4252 | Column-Oriented Storage Techniques for MapReduce | [
"cs.DB",
"cs.DC"
] | Users of MapReduce often run into performance problems when they scale up their workloads. Many of the problems they encounter can be overcome by applying techniques learned from over three decades of research on parallel DBMSs. However, translating these techniques to a MapReduce implementation such as Hadoop presents... | {
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1105.4253 | Implementing Performance Competitive Logical Recovery | [
"cs.DB"
] | New hardware platforms, e.g. cloud, multi-core, etc., have led to a reconsideration of database system architecture. Our Deuteronomy project separates transactional functionality from data management functionality, enabling a flexible response to exploiting new platforms. This separation requires, however, that recover... | {
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1105.4254 | Personalized Social Recommendations - Accurate or Private? | [
"cs.DB",
"cs.CR",
"cs.SI"
] | With the recent surge of social networks like Facebook, new forms of recommendations have become possible - personalized recommendations of ads, content, and even new friend and product connections based on one's social interactions. Since recommendations may use sensitive social information, it is speculated that thes... | {
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1105.4255 | Efficient Diversification of Web Search Results | [
"cs.IR"
] | In this paper we analyze the efficiency of various search results diversification methods. While efficacy of diversification approaches has been deeply investigated in the past, response time and scalability issues have been rarely addressed. A unified framework for studying performance and feasibility of result divers... | {
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1105.4256 | Social content matching in MapReduce | [
"cs.SI",
"cs.DC"
] | Matching problems are ubiquitous. They occur in economic markets, labor markets, internet advertising, and elsewhere. In this paper we focus on an application of matching for social media. Our goal is to distribute content from information suppliers to information consumers. We seek to maximize the overall relevance of... | {
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1105.4272 | Calibration with Changing Checking Rules and Its Application to
Short-Term Trading | [
"cs.LG"
] | We provide a natural learning process in which a financial trader without a risk receives a gain in case when Stock Market is inefficient. In this process, the trader rationally choose his gambles using a prediction made by a randomized calibrated algorithm. Our strategy is based on Dawid's notion of calibration with m... | {
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1105.4274 | On Instability of the Ergodic Limit Theorems with Respect to Small
Violations of Algorithmic Randomness | [
"cs.IT",
"math.IT"
] | An instability property of the Birkhoff's ergodic theorem and related asymptotic laws with respect to small violations of algorithmic randomness is studied. The Shannon--McMillan--Breiman theorem and all universal compression schemes are also among them. | {
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1105.4276 | Community structure of complex software systems: Analysis and
applications | [
"cs.SI",
"cs.SE",
"physics.data-an",
"physics.soc-ph"
] | Due to notable discoveries in the fast evolving field of complex networks, recent research in software engineering has also focused on representing software systems with networks. Previous work has observed that these networks follow scale-free degree distributions and reveal small-world phenomena, while we here explor... | {
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1105.4278 | Is the Multiverse Hypothesis capable of explaining the Fine Tuning of
Nature Laws and Constants? The Case of Cellular Automata | [
"nlin.CG",
"astro-ph.CO",
"cs.NE"
] | The objective of this paper is analyzing to which extent the multiverse hypothesis provides a real explanation of the peculiarities of the laws and constants in our universe. First we argue in favor of the thesis that all multiverses except Tegmark's <<mathematical multiverse>> are too small to explain the fine tuning,... | {
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1105.4318 | Correction of Noisy Sentences using a Monolingual Corpus | [
"cs.DL",
"cs.AI"
] | Correction of Noisy Natural Language Text is an important and well studied problem in Natural Language Processing. It has a number of applications in domains like Statistical Machine Translation, Second Language Learning and Natural Language Generation. In this work, we consider some statistical techniques for Text Cor... | {
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1105.4340 | Outage Probability of Diversity Combining Receivers in Arbitrarily
Fading Channels | [
"cs.IT",
"math.IT"
] | We propose a simple and accurate method to evaluate the outage probability at the output of arbitrarily fading L-branch diversity combining receiver. The method is based on the saddlepoint approximation, which only requires the knowledge of the moment generating functions of the signal-to-noise ratio at the output of e... | {
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1105.4354 | Preprocessing for Automating Early Detection of Cervical Cancer | [
"cs.CV"
] | Uterine Cervical Cancer is one of the most common forms of cancer in women worldwide. Most cases of cervical cancer can be prevented through screening programs aimed at detecting precancerous lesions. During Digital Colposcopy, colposcopic images or cervigrams are acquired in raw form. They contain specular reflections... | {
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1105.4360 | Random Matrix Model for Nakagami-Hoyt Fading | [
"cs.IT",
"math-ph",
"math.IT",
"math.MP"
] | Random matrix model for the Nakagami-q (Hoyt) fading in multiple-input multiple-output (MIMO) communication channels with arbitrary number of transmitting and receiving antennas is considered. The joint probability density for the eigenvalues of H{\dag}H (or HH{\dag}), where H is the channel matrix, is shown to corresp... | {
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1105.4378 | Performance of Hybrid Concatenated Trellis Codes CPFSK with Iterative
Decoding over Fading Channels | [
"cs.IT",
"math.IT"
] | Concatenation is a method of building long codes out of shorter ones, it attempts to meet the problem of decoding complexity by breaking the required computation into manageable segments. Concatenated Continuous Phase Frequency Shift Keying (CPFSK) facilitates powerful error correction. CPFSK also has the advantage of ... | {
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1105.4379 | Performance of MC-MC CDMA Systems with Nonlinear Models of HPA | [
"cs.IT",
"math.IT"
] | A new wireless communication system denoted as Multi-Code Multi-Carrier CDMA (MC-MC CDMA), which is the combination of Multi-Code CDMA and Multi-Carrier CDMA, is analyzed in this paper. This system can satisfy multi-rate services using multi-code schemes and muti-carrier services used for high rate transmission. The sy... | {
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1105.4380 | Performance of MF-MSK Systems with Pre-distortion Schemes | [
"cs.IT",
"math.IT"
] | Efficient RF power amplifiers used in third generation systems require linearization in order to reduce adjacent channel inter-modulation distortion, without sacrificing efficiency. Digital baseband predistortion is a highly cost-effective way to linearize power amplifiers (PAs). New communications services have create... | {
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1105.4385 | b-Bit Minwise Hashing for Large-Scale Linear SVM | [
"cs.LG",
"stat.AP",
"stat.CO",
"stat.ML"
] | In this paper, we propose to (seamlessly) integrate b-bit minwise hashing with linear SVM to substantially improve the training (and testing) efficiency using much smaller memory, with essentially no loss of accuracy. Theoretically, we prove that the resemblance matrix, the minwise hashing matrix, and the b-bit minwise... | {
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1105.4394 | Integrating Testing and Interactive Theorem Proving | [
"cs.SE",
"cs.AI",
"cs.LO"
] | Using an interactive theorem prover to reason about programs involves a sequence of interactions where the user challenges the theorem prover with conjectures. Invariably, many of the conjectures posed are in fact false, and users often spend considerable effort examining the theorem prover's output before realizing th... | {
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1105.4395 | Default-all is dangerous! | [
"cs.DB"
] | We show that the default-all propagation scheme for database annotations is dangerous. Dangerous here means that it can propagate annotations to the query output which are semantically irrelevant to the query the user asked. This is the result of considering all relationally equivalent queries and returning the union o... | {
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1105.4408 | A Simple Proof of the Mutual Incoherence Condition for Orthogonal
Matching Pursuit | [
"cs.IT",
"math.IT"
] | This paper provides a simple proof of the mutual incoherence condition $\mu < \frac{1}{2K-1}$ under which K-sparse signal can be accurately reconstructed from a small number of linear measurements using the orthogonal matching pursuit (OMP) algorithm. Our proof, based on mathematical induction, is built on an observati... | {
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1105.4452 | GutenTag: A Multi-Term Caching Optimized Tag Query Processor for
Key-Value Based NoSQL Storage Systems | [
"cs.IR",
"cs.DB"
] | NoSQL systems are more and more deployed as back-end infrastructure for large-scale distributed online platforms like Google, Amazon or Facebook. Their applicability results from the fact that most services of online platforms access the stored data objects via their primary key. However, NoSQL systems do not efficient... | {
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1105.4477 | On the Cohomology of 3D Digital Images | [
"cs.CV"
] | We propose a method for computing the cohomology ring of three--dimensional (3D) digital binary-valued pictures. We obtain the cohomology ring of a 3D digital binary--valued picture $I$, via a simplicial complex K(I)topologically representing (up to isomorphisms of pictures) the picture I. The usefulness of a simplicia... | {
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1105.4479 | Return probability and k-step measures | [
"physics.soc-ph",
"cs.SI"
] | The notion of return probability -- explored most famously by George P\'{o}lya on d-dimensional lattices -- has potential as a measure for the analysis of networks. We present an efficient method for finding return probability distributions for connected undirected graphs. We argue that return probability has the same ... | {
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1105.4480 | A Tool for Integer Homology Computation: Lambda-At Model | [
"cs.CV"
] | In this paper, we formalize the notion of lambda-AT-model (where $\lambda$ is a non-null integer) for a given chain complex, which allows the computation of homological information in the integer domain avoiding using the Smith Normal Form of the boundary matrices. We present an algorithm for computing such a model, ob... | {
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1105.4502 | Assessing Vaccination Sentiments with Online Social Media: Implications
for Infectious Disease Dynamics and Control | [
"cs.SI",
"physics.soc-ph",
"q-bio.PE"
] | There is great interest in the dynamics of health behaviors in social networks and how they affect collective public health outcomes, but measuring population health behaviors over time and space requires substantial resources. Here, we use publicly available data from 101,853 users of online social media collected ove... | {
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1105.4514 | Synthesis of Parallel Binary Machines | [
"cs.CR",
"cs.IT",
"math.IT"
] | Binary machines are a generalization of Feedback Shift Registers (FSRs) in which both, feedback and feedforward, connections are allowed and no chain connection between the register stages is required. In this paper, we present an algorithm for synthesis of binary machines with the minimum number of stages for a given ... | {
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1105.4540 | On the Limits of Sequential Testing in High Dimensions | [
"cs.IT",
"math.IT",
"math.ST",
"stat.TH"
] | This paper presents results pertaining to sequential methods for support recovery of sparse signals in noise. Specifically, we show that any sequential measurement procedure fails provided the average number of measurements per dimension grows slower then log s / D(f0||f1) where s is the level of sparsity, and D(f0||f1... | {
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1105.4549 | On Stochastic Gradient and Subgradient Methods with Adaptive Steplength
Sequences | [
"math.OC",
"cs.SY"
] | The performance of standard stochastic approximation implementations can vary significantly based on the choice of the steplength sequence, and in general, little guidance is provided about good choices. Motivated by this gap, in the first part of the paper, we present two adaptive steplength schemes for strongly conve... | {
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1105.4555 | Secure Lossy Source-Channel Wiretapping with Side Information at the
Receiving Terminals | [
"cs.IT",
"math.IT"
] | The problem of secure lossy source-channel wiretapping with arbitrarily correlated side informations at both receivers is investigated. This scenario consists of an encoder (referred to as Alice) that wishes to compress a source and send it through a noisy channel to a legitimate receiver (referred to as Bob). In this ... | {
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1105.4582 | Perception of Personality and Naturalness through Dialogues by Native
Speakers of American English and Arabic | [
"cs.CL",
"cs.RO"
] | Linguistic markers of personality traits have been studied extensively, but few cross-cultural studies exist. In this paper, we evaluate how native speakers of American English and Arabic perceive personality traits and naturalness of English utterances that vary along the dimensions of verbosity, hedging, lexical and ... | {
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1105.4585 | PAC-Bayesian Analysis of the Exploration-Exploitation Trade-off | [
"cs.LG",
"stat.ML"
] | We develop a coherent framework for integrative simultaneous analysis of the exploration-exploitation and model order selection trade-offs. We improve over our preceding results on the same subject (Seldin et al., 2011) by combining PAC-Bayesian analysis with Bernstein-type inequality for martingales. Such a combinatio... | {
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1105.4618 | Bounding the Fat Shattering Dimension of a Composition Function Class
Built Using a Continuous Logic Connective | [
"cs.LG"
] | We begin this report by describing the Probably Approximately Correct (PAC) model for learning a concept class, consisting of subsets of a domain, and a function class, consisting of functions from the domain to the unit interval. Two combinatorial parameters, the Vapnik-Chervonenkis (VC) dimension and its generalizati... | {
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1105.4665 | Improved Linear Programming Decoding using Frustrated Cycles | [
"cs.IT",
"math.IT"
] | We consider transmission over a binary-input additive white Gaussian noise channel using low-density parity-check codes. One of the most popular techniques for decoding low-density parity-check codes is the linear programming decoder. In general, the linear programming decoder is suboptimal. I.e., the word error rate i... | {
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1105.4683 | On the BCJR Algorithm for Asynchronous Physical-layer Network Coding | [
"cs.IT",
"math.IT"
] | In practical asynchronous bi-directional relaying, symbols transmitted by two source nodes cannot arrive at the relay with perfect symbol alignment and the symbol-asynchronous multiple-access channel (MAC) should be seriously considered. Recently, Lu et al. proposed a Tanner-graph representation of symbol-asynchronous ... | {
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1105.4701 | Online Learning, Stability, and Stochastic Gradient Descent | [
"cs.LG"
] | In batch learning, stability together with existence and uniqueness of the solution corresponds to well-posedness of Empirical Risk Minimization (ERM) methods; recently, it was proved that CV_loo stability is necessary and sufficient for generalization and consistency of ERM. In this note, we introduce CV_on stability,... | {
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1105.4702 | Exploiting Conceptual Knowledge for Querying Information Systems | [
"cs.IR",
"cs.DB"
] | Whereas today's information systems are well-equipped for efficient query handling, their strict mathematical foundations hamper their use for everyday tasks. In daily life, people expect information to be offered in a personalized and focused way. But currently, personalization in digital systems still only takes expl... | {
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1105.4705 | A Tutorial in Connectome Analysis: Topological and Spatial Features of
Brain Networks | [
"q-bio.NC",
"cs.SI",
"physics.soc-ph"
] | High-throughput methods for yielding the set of connections in a neural system, the connectome, are now being developed. This tutorial describes ways to analyze the topological and spatial organization of the connectome at the macroscopic level of connectivity between brain regions as well as the microscopic level of c... | {
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1105.4712 | Image Splicing Detection Using Inherent Lens Radial Distortion | [
"cs.CV"
] | Image splicing is a common form of image forgery. Such alterations may leave no visual clues of tampering. In recent works camera characteristics consistency across the image has been used to establish the authenticity and integrity of digital images. Such constant camera characteristic properties are inherent from cam... | {
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1105.4737 | Sufficient Stochastic Maximum Principle for Discounted Control Problem | [
"math.OC",
"cs.SY",
"math.PR"
] | In this article, the sufficient Pontryagin's maximum principle for infinite horizon discounted stochastic control problem is established. The sufficiency is ensured by an additional assumption of concavity of the Hamiltonian function. Throughout the paper, it is assumed that the control domain U is a convex set and the... | {
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1105.4764 | Theorical and Numerical Analysis of the Rapid Pointwise Stabilization of
Coupled String-Beam Systems | [
"math.OC",
"cs.SY",
"math.AP"
] | We consider a pointwise stabilization problem for a coupled wave and plate equations. We prove under rather general assumptions, that such systems can stabilized so as to have arbitrarily high decay rates and are exactly controllable. We propose a numerical approximation of the model and we study numerically the constr... | {
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1105.4868 | Search for Hidden Knowledge in Collective Intelligence dealing
Indeterminacy Ontology of Folksonomy with Linguistic Pragmatics and Quantum
Logic | [
"cs.IR"
] | Information retrieval is not only the most frequent application executed on the Web but it is also the base of different types of applications. Considering collective intelligence of groups of individuals as a framework for evaluating and incorporating new experiences and information we often cannot retrieve such knowl... | {
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1105.4880 | Pareto Characterization of the Multicell MIMO Performance Region With
Simple Receivers | [
"cs.IT",
"math.IT"
] | We study the performance region of a general multicell downlink scenario with multiantenna transmitters, hardware impairments, and low-complexity receivers that treat interference as noise. The Pareto boundary of this region describes all efficient resource allocations, but is generally hard to compute. We propose a no... | {
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1105.4910 | Robust Coding for Lossy Computing with Observation Costs | [
"cs.IT",
"math.IT"
] | An encoder wishes to minimize the bit rate necessary to guarantee that a decoder is able to calculate a symbol-wise function of a sequence available only at the encoder and a sequence that can be measured only at the decoder. This classical problem, first studied by Yamamoto, is addressed here by including two new aspe... | {
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1105.4965 | Evolution of scaling emergence in large-scale spatial epidemic spreading | [
"physics.soc-ph",
"cs.SI",
"physics.data-an",
"q-bio.PE"
] | Background: Zipf's law and Heaps' law are two representatives of the scaling concepts, which play a significant role in the study of complexity science. The coexistence of the Zipf's law and the Heaps' law motivates different understandings on the dependence between these two scalings, which is still hardly been clarif... | {
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1105.4971 | Distributed Evolutionary Computation using REST | [
"cs.NE"
] | This paper analises distributed evolutionary computation based on the Representational State Transfer (REST) protocol, which overlays a farming model on evolutionary computation. An approach to evolutionary distributed optimisation of multilayer perceptrons (MLP) using REST and language Perl has been done. In these exp... | {
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1105.4978 | SOAP vs REST: Comparing a master-slave GA implementation | [
"cs.NE"
] | In this paper, a high-level comparison of both SOAP (Simple Object Access Protocol) and REST (Representational State Transfer) is made. These are the two main approaches for interfacing to the web with web services. Both approaches are different and present some advantages and disadvantages for interfacing to web servi... | {
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"cs.SD": 0,
"cs.SI": 0,
"cs.SY": 0
} |
1105.4989 | Incremental Refinement using a Gaussian Test Channel | [
"cs.IT",
"math.IT"
] | The additive rate-distortion function (ARDF) was developed in order to universally bound the rate loss in the Wyner-Ziv problem, and has since then been instrumental in e.g., bounding the rate loss in successive refinements, universal quantization, and other multi-terminal source coding settings. The ARDF is defined as... | {
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} |
1105.4991 | Exchanging Secrets without Using Cryptography | [
"cs.CR",
"cs.IT",
"math.IT"
] | We consider the problem where a group of n nodes, connected to the same broadcast channel (e.g., a wireless network), want to generate a common secret bitstream, in the presence of an adversary Eve, who tries to obtain information on the bitstream. We assume that the nodes initially share a (small) piece of information... | {
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} |
1105.4995 | Robust approachability and regret minimization in games with partial
monitoring | [
"math.ST",
"cs.LG",
"stat.TH"
] | Approachability has become a standard tool in analyzing earning algorithms in the adversarial online learning setup. We develop a variant of approachability for games where there is ambiguity in the obtained reward that belongs to a set, rather than being a single vector. Using this variant we tackle the problem of app... | {
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} |
1105.4999 | MIMO Broadcasting for Simultaneous Wireless Information and Power
Transfer | [
"cs.IT",
"math.IT"
] | Wireless power transfer (WPT) is a promising new solution to provide convenient and perpetual energy supplies to wireless networks. In practice, WPT is implementable by various technologies such as inductive coupling, magnetic resonate coupling, and electromagnetic (EM) radiation, for short-/mid-/long-range application... | {
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} |
1105.5032 | The Complexity of Manipulative Attacks in Nearly Single-Peaked
Electorates | [
"cs.GT",
"cs.CC",
"cs.MA"
] | Many electoral bribery, control, and manipulation problems (which we will refer to in general as "manipulative actions" problems) are NP-hard in the general case. It has recently been noted that many of these problems fall into polynomial time if the electorate is single-peaked (i.e., is polarized along some axis/issue... | {
"Other": 1,
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} |
1105.5053 | Eigenvector localization as a tool to study small communities in online
social networks | [
"physics.soc-ph",
"cond-mat.stat-mech",
"cs.SI"
] | We present and discuss a mathematical procedure for identification of small "communities" or segments within large bipartite networks. The procedure is based on spectral analysis of the matrix encoding network structure. The principal tool here is localization of eigenvectors of the matrix, by means of which the releva... | {
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} |
1105.5072 | Sub-optimality of Treating Interference as Noise in the Cellular Uplink | [
"cs.IT",
"math.IT"
] | Despite the simplicity of the scheme of treating interference as noise (TIN), it was shown to be sum-capacity optimal in the Gaussian 2-user interference channel in \cite{ShangKramerChen,MotahariKhandani,AnnapureddyVeeravalli}. In this paper, an interference network consisting of a point-to-point channel interfering wi... | {
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"cs.SD": 0,
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"cs.SY": 0
} |
1105.5129 | A Quantitative Version of the Gibbard-Satterthwaite Theorem for Three
Alternatives | [
"math.CO",
"cs.AI",
"math.PR"
] | The Gibbard-Satterthwaite theorem states that every non-dictatorial election rule among at least three alternatives can be strategically manipulated. We prove a quantitative version of the Gibbard-Satterthwaite theorem: a random manipulation by a single random voter will succeed with a non-negligible probability for an... | {
"Other": 0,
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} |
1105.5170 | Validation of Dunbar's number in Twitter conversations | [
"physics.soc-ph",
"cond-mat.other",
"cs.HC",
"cs.SI"
] | Modern society's increasing dependency on online tools for both work and recreation opens up unique opportunities for the study of social interactions. A large survey of online exchanges or conversations on Twitter, collected across six months involving 1.7 million individuals is presented here. We test the theoretical... | {
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"cs.SY": 0
} |
1105.5174 | Symmetry Reduction of Optimal Control Systems and Principal Connections | [
"math.OC",
"cs.SY",
"math.SG"
] | This paper explores the role of symmetries and reduction in nonlinear control and optimal control systems. The focus of the paper is to give a geometric framework of symmetry reduction of optimal control systems as well as to show how to obtain explicit expressions of the reduced system by exploiting the geometry. In p... | {
"Other": 0,
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"cs.SY": 1
} |
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