Results for "Hamza Alkhatib"

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A New Kalman Filter Model for Nonlinear Systems Based on Ellipsoidal BoundingFeb 08 2018In this paper, a new filter model called set-membership Kalman filter for nonlinear state estimation problems was designed, where both random and unknown but bounded uncertainties were considered simultaneously in the discrete-time system. The main loop ... More
RSA algorithm with a new approach encryption and decryption message text by asciiJan 09 2016In many research works, there has been an orientation to studying and developing many of the applications of public-key cryptography to secure the data while transmitting in the systems, In this paper we present an approach to encrypt and decrypt the ... More
Laying the Groundwork for a Worker-Centric Peer EconomyJul 21 2018The "gig economy" has transformed the ways in which people work, but in many ways these markets stifle the growth of workers and the autonomy and protections that workers have grown to expect. We explored the viability of a "worker centric peer economy"--a ... More
Analysis of Research in Healthcare Data AnalyticsJun 04 2016The main aim of this paper is to provide a deep analysis on the research field of healthcare data analytics. This paper is analyzing the previous studies and works in this research area, as well as highlighting some of guidelines and gaps. This study ... More
Accelerating Iterative SpMV for Discrete Logarithm Problem Using GPUsSep 25 2012Dec 04 2014In the context of cryptanalysis, computing discrete logarithms in large cyclic groups using index-calculus-based methods, such as the number field sieve or the function field sieve, requires solving large sparse systems of linear equations modulo the ... More
On representing the positive semidefinite cone using the second-order coneOct 16 2016The second-order cone plays an important role in convex optimization and has strong expressive abilities despite its apparent simplicity. Second-order cone formulations can also be solved more efficiently than semidefinite programming in general. We consider ... More
The set of separable states has no finite semidefinite representation except in dimension $3\times 2$May 04 2019Given integers n $\geq$ m, let Sep(n,m) be the set of separable states on the Hilbert space $\mathbb{C}^n \otimes \mathbb{C}^m$. It is well-known that for (n,m)=(3,2) the set of separable states has a simple description using semidefinite programming: ... More
Lieb's concavity theorem, matrix geometric means, and semidefinite optimizationDec 10 2015Mar 23 2016A famous result of Lieb establishes that the map $(A,B) \mapsto \text{tr}\left[K^* A^{1-t} K B^t\right]$ is jointly concave in the pair $(A,B)$ of positive definite matrices, where $K$ is a fixed matrix and $t \in [0,1]$. In this paper we show that Lieb's ... More
Monte Carlo investigation of a spherical ferrimagnetic core-shell nanoparticle under a time dependent magnetic fieldFeb 25 2013Feb 26 2013Monte Carlo simulation based on Metropolis algorithm has been used with a great success to analyze the dynamic phase transition properties of a single spherical core-shell nanoparticle system with a spin-3/2 core surrounded by a spin-1 shell layer with ... More
Correlated Markov Quantum WalksOct 21 2011We consider the discrete time unitary dynamics given by a quantum walk on $\Z^d$ performed by a particle with internal degree of freedom, called coin state, according to the following iterated rule: a unitary update of the coin state takes place, followed ... More
On Rogers-Ramanujan functions, binary quadratic forms and eta-quotientsApr 04 2012Jul 22 2012In a handwritten manuscript published with his lost notebook, Ramanujan stated without proofs forty identities for the Rogers-Ramanujan functions. We observe that the functions that appear in Ramanujan's identities can be obtained from a Hecke action ... More
Decay of Qubits under arbitrary space-time trajectories: The Zeno & Anti-Zeno EffectsNov 23 2018Modeling an arbitrarily accelerating qubit as an open quantum system, we derive an exact solution for the pure-dephasing model ($\sigma_z$ coupling) under arbitrary qubit space-time trajectories, as well as general expressions for the survival probabilities ... More
IRONHIDE: A Secure Multicore Architecture that Leverages Hardware Isolation Against Microarchitecture State AttacksApr 29 2019Modern microprocessors enable aggressive hardware virtualization that exposes the microarchitecture state of the processor due to temporal sharing of hardware resources. This paper proposes a novel secure multicore architecture, IRONHIDE that aims to ... More
New Identities for 7-cores with prescribed BG-rankMar 06 2006Sep 15 2007A q-series with nonnegative power series coefficients is called positive. The partition statistics BG-rank is defined as an alternating sum of parities of parts of a partition. It is known that the generating function for the number of partitions of n ... More
The blow-up rate for strongly perturbed semilinear wave equations in the conformal regime without a radial assumptionDec 21 2015We consider in this paper a large class of perturbed semilinear wave equations with critical (in the conformal transform sense) power nonlinearity. We will show that the blow-up rate of any singular solution is given by the solution of the non-perturbed ... More
Effects of the quenched random crystal field on the non-equilibrium relaxation process of the spin-3/2 Blume-Capel modelOct 08 2011Sep 27 2012In this work, the relaxation process of the spin-3/2 Blume-Capel model with quenched random crystal field on a two dimensional square lattice has been investigated by a method which combines the statistical equilibrium theory and the thermodynamic of ... More
Magnetic response of a disordered binary ferromagnetic alloy to an oscillating magnetic fieldApr 11 2015By means of Monte Carlo simulation with local spin update Metropolis algorithm, we have elucidated non-equilibrium phase transition properties and stationary-state treatment of a disordered binary ferromagnetic alloy of the type $A_{p}B_{1-p}$ on a square ... More
An introduced effective-field theory study of spin-1 transverse Ising model with crystal field anisotropy in a longitudinal magnetic fieldFeb 16 2010A spin-1 transverse Ising model with longitudinal crystal field in a longitudinal magnetic field is examined by introducing an effective field approximation (IEFT) which includes the correlations between different spins that emerge when expanding the ... More
New characterizations of the Letac-Mora class of real cubic natural exponential familiesAug 13 2011In this paper, we give three equivalent properties of the class of multivariate simple cubic natural exponential families (NEF's). The first property says that the cumulant function of any basis of the family is a solution of some Monge-Amp\'{e}re equation, ... More
Optimal Test Sets for Context-Free LanguagesNov 21 2016A test set for a formal language (set of strings) L is a subset T of L such that for any two string homomorphisms f and g defined on L, if the restrictions of f and g on T are identical functions, then f and g are identical on the entire L. Previously, ... More
Differentiable mappings on products with different degrees of differentiability in the two factorsAug 31 2012Mar 28 2014We develop differential calculus of $C^{r,s}$-mappings on products of locally convex spaces and prove exponential laws for such mappings. As an application, we consider differential equations in Banach spaces depending on a parameter in a locally convex ... More
Dynamic phase transitions in a ferromagnetic thin film system: A Monte Carlo simulation studyApr 18 2015Dynamic phase transition properties of ferromagnetic thin film system under the influence both bias and time dependent magnetic fields have been elucidated by means of kinetic Monte Carlo simulation with local spin update Metropolis algorithm. The obtained ... More
Nonequilibrium dynamics of a mixed spin-1/2 and spin-3/2 Ising ferrimagnetic system with a time dependent oscillating magnetic field sourceNov 14 2013Aug 26 2014Nonequilibrium phase transition properties of a mixed Ising ferrimagnetic model consisting of spin-1/2 and spin-3/2 on a square lattice under the existence of a time dependent oscillating magnetic field have been investigated by making use of Monte Carlo ... More
Sedimentation of granular columns in the viscous and weakly inertial regimesOct 31 2013We investigate the dynamics of granular columns of point particles that interact via long-range hydrodynamic interactions and fall under the action of gravity. We investigate the influence of inertia using the Green's function for the Oseen equation. ... More
Bayesian approach to cubic natural exponential familiesNov 10 2012For a natural exponential family (NEF), one can associate in a natural way two standard families of conjugate priors, one on the natural parameter and the other on the mean parameter. These families of conjugate priors have been used to establish some ... More
Minimal Synthesis of String To String Functions From ExamplesOct 25 2017Jun 04 2018We study the problem of synthesizing string to string transformations from a set of input/output examples. The transformations we consider are expressed using deterministic finite automata (DFA) that read pairs of letters, one letter from the input and ... More
PS-Hollow Representations of Modules over Commutative RingsApr 19 2018Let $R$ be a commutative ring and $M$ a non-zero $R$-module. We introduce the class of \emph{pseudo strongly hollow submodules} (\emph{PS-hollow submodules}, for short) of $M$. Inspired by the theory of modules with \emph{secondary representations}, we ... More
Ramanujan's Identities and Representation of Integers by Certain Binary and Quaternary Quadratic FormsNov 10 2006Feb 06 2007We revisit old conjectures of Fermat and Euler regarding representation of integers by binary quadratic form x^2+5y^2. Making use of Ramanujan's_1\psi_1 summation formula we establish a new Lambert series identity for \sum_{n,m=-\infty}^{\infty} q^{n^2+5m^2}. ... More
Supercyclicity of the left and right multiplication operators on Banach ideal of operatorsMay 11 2019Let $X$ be a Banach space with $\dim X>1$ such that $X^{\ast}$, its dual, is separable and $\mathcal{B}(X)$ the algebra of bounded linear operators on $X$. In this paper, we study the passage of property of being supercyclic from an operator $T\in\mathcal{B}(X)$ ... More
Constraints on electroweak gauged unparticle model from the oblique parameters S and TMay 01 2019The oblique parameters $S$ and $T$ are calculated in a gauged unparticles model based on the electroweak group $SU(2)*U(1)$ and it's parameters space is constrained using electroweak precision measurements.
Quantum Entanglement involved in Grover's and Shor's algorithms: the four-qubit caseNov 21 2018Dec 04 2018In this paper, we study the nature of entanglement in quantum Grover's and Shor's algorithms. So far, the authors who have been interested in this problem have approached the question quantitatively by introducing entanglement measures (numerical ones ... More
On inversion and connection coefficients for basic hypergeometric polynomialsDec 12 2015In this paper, we propose a general method to express explicitly the inversion and the connection coefficients between two basic hypergeometric polynomial sets. As application, we consider some $d$-orthogonal basic hypergeometric polynomials and we derive ... More
Three-qutrit entanglement and simple singularitiesJun 17 2016In this paper, we use singularity theory to study the entanglement nature of pure three-qutrit systems. We first consider the algebraic variety $X$ of separable three-qutrit states within the projective Hilbert space $\mathbb{P}(\mathcal{H}) = \mathbb{P}^{26}$. ... More
Mode-coupling and nonlinear Landau damping effects in auroral Farley-Buneman turbulenceOct 01 1998The fundamental problem of Farley-Buneman turbulence in the auroral $E$-region has been discussed and debated extensively in the past two decades. In the present paper we intend to clarify the different steps that the auroral $E$-region plasma has to ... More
Cognitive Power Control Under Correlated Fading and Primary-Link CSISep 29 2009We consider the cognitive power control problem of maximizing the secondary throughput under an outage probability constraint on a constant-power constant-rate primary link. We assume a temporally correlated primary channel with two types of feedback: ... More
The hadronization time of heavy quark in nuclear matterJan 18 2016We study the hadronization time of heavy quark in nuclear matter by using the coalescence model and the spatial diffusion constant of heavy quark from lattice Quantum Chromodynamic calculations, assuming that the main interaction of heavy quark at the ... More
Spectral Properties of Non-Unitary Band MatricesMar 15 2014Oct 22 2014We consider families of random non-unitary contraction operators defined as deformations of CMV matrices which appear naturally in the study of random quantum walks on trees or lattices. We establish several deterministic and almost sure results about ... More
"If You Can't Beat them, Join them": A Usability Approach to Interdependent Privacy in Cloud AppsFeb 27 2017Mar 24 2017Cloud storage services, like Dropbox and Google Drive, have growing ecosystems of 3rd party apps that are designed to work with users' cloud files. Such apps often request full access to users' files, including files shared with collaborators. Hence, ... More
Zariski-like Topologies for Lattices with Applications to Modules over Commutative RingsNov 10 2017We study Zariski-like topologies on a proper class $X\varsubsetneqq L$ of a complete lattice $\mathcal{L}=(L,\wedge ,\vee ,0,1)$. We consider $X$ with the so called classical Zariski topology $(X,\tau ^{cl})$ and study its topological properties (e.g. ... More
Thermalization of Fermionic Quantum WalkersNov 22 2016We consider the discrete time dynamics of an ensemble of fermionic quantum walkers moving on a finite discrete sample, interacting with a reservoir of infinitely many quantum particles on the one dimensional lattice. The reservoir is given by a fermionic ... More
Robust Adaptive Median Binary Pattern for noisy texture classification and retrievalMay 15 2018Texture is an important cue for different computer vision tasks and applications. Local Binary Pattern (LBP) is considered one of the best yet efficient texture descriptors. However, LBP has some notable limitations, mostly the sensitivity to noise. In ... More
Spectral Graph Theoretic Analysis of Tsallis Entropy-based Dissimilarity MeasureApr 08 2015Apr 14 2015In this paper we introduce a nonextensive quantum information theoretic measure which may be defined between any arbitrary number of density matrices, and we analyze its fundamental properties in the spectral graph-theoretic framework. Unlike other entropic ... More
Resonance broadening theory of Farley-Buneman turbulence in the auroral E-regionOct 01 1998The conventional theory of resonance broadening for a two-species plasma in a magnetic field is revised, and applied to an ionospheric turbulence case. The assumptions made in the conventional theory of resonance broadening have, in the past, led to replacing ... More
Nonequilibrium dynamics of a spin-3/2 Blume Capel model with quenched random crystal fieldSep 26 2012The relaxation and complex magnetic susceptibility treatments of a spin-3/2 Blume-Capel model with quenched random crystal field on a two dimensional square lattice are investigated by a method combining the statistical equilibrium theory and the thermodynamics ... More
Efficient optimization of the quantum relative entropyMay 18 2017Aug 08 2018Many quantum information measures can be written as an optimization of the quantum relative entropy between sets of states. For example, the relative entropy of entanglement of a state is the minimum relative entropy to the set of separable states. The ... More
Spectral Transition for Random Quantum Walks on TreesDec 25 2012May 09 2013We define and analyze random quantum walks on homogeneous trees of degree $q\geq 3$. Such walks describe the discrete time evolution of a quantum particle with internal degree of freedom in $\C^q$ hopping on the neighboring sites of the tree in presence ... More
On the representations of integers by the sextenary quadratic form x^2+y^2+z^2+ 7s^2+7t^2+ 7u^2 and 7-coresApr 13 2008In this paper we derive an explicit formula for the number of representations of an integer by the sextenary form x^2+y^2+z^2+ 7s^2+7t^2+ 7u^2. We establish the following intriguing inequalities 2b(n)>=a_7(n)>=b(n) for n not equal to 0,2,6,16. Here a_7(n) ... More
Lyapunov Exponents for Unitary Anderson ModelsNov 28 2006We study a unitary version of the one-dimensional Anderson model, given by a five diagonal deterministic unitary operator multiplicatively perturbed by a random phase matrix. We fully characterize positivity and vanishing of the Lyapunov exponent for ... More
ADMM-based Networked Stochastic Variational InferenceFeb 27 2018Owing to the recent advances in "Big Data" modeling and prediction tasks, variational Bayesian estimation has gained popularity due to their ability to provide exact solutions to approximate posteriors. One key technique for approximate inference is stochastic ... More
Minimax Game-Theoretic Approach to Multiscale H-infinity Optimal FilteringJul 24 2017Aug 08 2017Sensing in complex systems requires large-scale information exchange and on-the-go communications over heterogeneous networks and integrated processing platforms. Many networked cyber-physical systems exhibit hierarchical infrastructures of information ... More
Exponential lower bounds on fixed-size psd rank and semidefinite extension complexityNov 11 2013There has been a lot of interest recently in proving lower bounds on the size of linear programs needed to represent a given polytope P. In a breakthrough paper Fiorini et al. [Proceedings of 44th ACM Symposium on Theory of Computing 2012, pages 95-106] ... More
On nonexistence of non-constant volatility in the Black-Scholes formulaFeb 10 2005We prove that if the Black-Scholes formula holds with the spot volatility for call options with all strikes, then the volatility parameter is constant. The proof relies some result on semimartingales (Theorem 2) of independent interest.
A Multicomponent Approach to Nonrigid Registration of Diffusion Tensor ImagesApr 08 2015Apr 14 2015We propose a nonrigid registration approach for diffusion tensor images using a multicomponent information-theoretic measure. Explicit orientation optimization is enabled by incorporating tensor reorientation, which is necessary for wrapping diffusion ... More
A Lyapunov functional and blow-up results for a class of perturbed semilinear wave equationsFeb 11 2010We consider in this paper some class of perturbation for the semilinear wave equation with subcritical (in the conformal transform sense) power nonlinearity. We first derive a Lyapunov functional in similarity variables and then use it to derive the blow-up ... More
Blow-up behavior for the Klein-Gordon and other perturbed semilinear wave equationsJan 03 2013We give blow-up results for the Klein-Gordon equation and other perturbations of the semilinear wave equations with superlinear power nonlinearity, in one space dimension or in higher dimension under radial symmetry outside the origin.
Web3D Graphics enabled through Sensor Networks for Cost-Effective Assessment and Management of Energy Efficiency in BuildingsNov 12 2018The past decade has seen the advent of numerous building energy efficiency visualization and simulation systems; however, most of them rely on theoretical thermal models to suggest building structural design for new constructions and modifications for ... More
Shape Classification using Spectral Graph WaveletsMay 12 2017Spectral shape descriptors have been used extensively in a broad spectrum of geometry processing applications ranging from shape retrieval and segmentation to classification. In this pa- per, we propose a spectral graph wavelet approach for 3D shape classification ... More
New Results On the Sum of Two Generalized Gaussian Random VariablesMay 31 2015We propose in this paper a new method to compute the characteristic function (CF) of generalized Gaussian (GG) random variable in terms of the Fox H function. The CF of the sum of two independent GG random variables is then deduced. Based on this results, ... More
On Solutions of First Order Stochastic Partial Differential EquationsOct 24 2005This note is concerned with an important for modelling question of existence of solutions of stochastic partial differential equations as proper stochastic processes, rather than processes in the generalized sense. We consider a first order stochastic ... More
The Gauß-Bonnet operator of an infinite graphJan 04 2013Sep 11 2014We propose a general condition, to ensure essential self-adjointness for the Gau{\ss}-Bonnet operator, based on a notion of completeness as Chernoff. This gives essential self-adjointness of the Laplace operator both for functions or 1-forms on infinite ... More
A framework for reuse of multi-view UML artifactsFeb 02 2014Software is typically modeled from different viewpoints such as structural view, behavioral view and functional view. Few existing works can be considered as applying multi-view retrieval approaches. A number of important issues regarding mapping of entities ... More
Isomorphy up to complementationJan 21 2015Considering uniform hypergraphs, we prove that for every non-negative integer $h$ there exist two non-negative integers $k$ and $t$ with $k\leq t$ such that two $h$-uniform hypergraphs ${\mathcal H}$ and ${\mathcal H}'$ on the same set $V$ of vertices, ... More
The blow-up rate for strongly perturbed semilinear wave equations in the conformal caseOct 23 2014Apr 01 2015We consider in this work some class of strongly perturbed for the semilinear wave equation with conformal power nonlinearity. We obtain an optimal estimate for a radial blow-up solution and we have also obtained two less stronger estimates. These results ... More
A Lyapunov functional and blow-up results for a class of perturbations for semilinear wave equations in the critical caseMay 20 2010May 25 2010We consider in this paper some class of perturbation for the semilinear wave equation with critical (in the conformal transform sense) power nonlinearity. Working in the framework of similarity variables, we find a Lyapunov functional for the problem. ... More
Prescribing the center of mass of a multi-soliton solution for a perturbed semilinear wave equationFeb 13 2019We construct a finite-time blow-up solution for a class of strongly perturbed semilinear wave equation with an isolated characteristic point in one space dimension. Given any integer $k\ge 2$ and $\zeta_0 \in \mathbb{R}$, we construct a blow-up solution ... More
BLMA: A Blind Matching Algorithm with Application to Cognitive Radio NetworksMay 01 2016We consider a two-sided matching problem with a defined notion of pairwise stability. We propose a distributed blind matching algorithm (BLMA) to solve the problem. We prove the solution produced by BLMA will converge to an $\epsilon$-pairwise stable ... More
Blow-up results for semilinear wave equations in the super-conformal caseJan 03 2013We consider the semilinear wave equation in higher dimensions with power nonlinearity in the super-conformal range, and its perturbations with lower order terms, including the Klein-Gordon equation. We improve the upper bounds on blow-up solutions previously ... More
Shifted and Shiftless Partition Identities IIMay 12 2006Let S and T be sets of positive integers and let a be a fixed positive integer. An a-shifted partition identity has the form p(S,n)=p(T,n-a), for all n greater or equal to a. Here p(S,n) is the number partitions of n whose parts are elements of S. For ... More
Global spectral graph wavelet signature for surface analysis of carpal bonesSep 04 2017In this paper, we present a spectral graph wavelet approach for shape analysis of carpal bones of human wrist. We apply a metric called global spectral graph wavelet signature for representation of cortical surface of the carpal bone based on eigensystem ... More
Lower bounds on nonnegative rank via nonnegative nuclear normsOct 25 2012Jan 29 2015The nonnegative rank of an entrywise nonnegative matrix A of size mxn is the smallest integer r such that A can be written as A=UV where U is mxr and V is rxn and U and V are both nonnegative. The nonnegative rank arises in different areas such as combinatorial ... More
Temperature dependent change in the symmetry of the order parameter in an electron-doped high-temperature superconductorFeb 09 2004We present specific heat measurements which show an unexpected phase transition from d-wave symmetry to s-wave symmetry as the temperature is reduced in electron-doped Pr$_{2-x}$Ce$_{x}$CuO$_{4-\delta}$ (PCCO), in both optimal and over-doped single crystals. ... More
Relativistic surfatron process for Landau resonant electrons in radiation beltsFeb 07 2014Recent theoretical studies of the nonlinear wave-particle interactions for relativistic particles have shown that Landau resonant orbits could be efficiently accelerated along the mean background magnetic field for propagation angles $\theta$ in close ... More
Dynamical Systems' approach to relativistic nonlinear wave-particle interaction in weakly collisional plasmasMar 11 2012In this report, we present a dynamical systems' approach to study the exact nonlinear wave-particle interaction in relativistic regime. We give a particular attention to the effect of wave obliquity on the dynamics of the orbits by studying the specific ... More
Relativistic acceleration of Landau resonant particles as a consequence of Hopf bifurcationsApr 25 2011Feb 18 2012Using bifurcation theory on a dynamical system simulating the interaction of a particle with an obliquely propagating wave in relativistic regimes, we demonstrate that uniform acceleration arises as a consequence of Hopf bifurcations of Landau resonant ... More
Self-scaled bounds for atomic cone ranks: applications to nonnegative rank and cp-rankApr 11 2014The nonnegative rank of a matrix A is the smallest integer r such that A can be written as the sum of r rank-one nonnegative matrices. The nonnegative rank has received a lot of attention recently due to its application in optimization, probability and ... More
The blow-up rate for strongly perturbed semilinear wave equationsNov 29 2013We consider in this paper a large class of perturbed semilinear wave equation with subconformal power nonlinearity. In particular, we allow log perturbations of the main source. We derive a Lyapunov functional in similarity variables and use it to derive ... More
A novel framework for automatic detection of Autism: A study on Corpus Callosum and Intracranial Brain VolumeMar 27 2019Computer vision and machine learning are the linchpin of field of automation. The medicine industry has adopted numerous methods to discover the root causes of many diseases in order to automate detection process. But, the biomarkers of Autism Spectrum ... More
Claw-freeness, 3-homogeneous subsets of a graph and a reconstruction problemDec 06 2008We describe $Forb\{K_{1,3}, \overline {K_{1,3}}\}$, the class of graphs $G$ such that $G$ and its complement $ \overline{G}$ are claw-free. With few exceptions, it is made of graphs whose connected components consist of cycles of length at least 4, paths ... More
Thermocapillary flows and interface deformations produced by localized laser heating in confined environmentMar 08 2012The deformation of a fluid-fluid interface due to the thermocapillary stress induced by a continuous Gaussian laser wave is investigated analytically. We show that the direction of deformation of the liquid interface strongly depends on the viscosities ... More
A Family of non-Gaussian Martingales with Gaussian MarginalsApr 06 2006We construct a family of non-Gaussian martingales the marginals of which are all Gaussian. We give the predictable quadratic variation of these processes and show they do not have continuous paths. These processes are Markovian and inhomogeneous in time, ... More
MultiQueues: Simpler, Faster, and Better Relaxed Concurrent Priority QueuesNov 05 2014Priority queues with parallel access are an attractive data structure for applications like prioritized online scheduling, discrete event simulation, or branch-and-bound. However, a classical priority queue constitutes a severe bottleneck in this context, ... More
Novel Network Coding-based Techniques for Multi-layer Video Delivery over Multi-hop Wireless testbedApr 29 2013The actual performance of video delivery over wireless networks is best captured through experimental studies over real testbed, which is crucial to uncover the technical problems and practical challenges of realizing the proposed video delivery techniques. ... More
Representations of Sound in Deep Learning of Audio Features from MusicDec 08 2017The work of a single musician, group or composer can vary widely in terms of musical style. Indeed, different stylistic elements, from performance medium and rhythm to harmony and texture, are typically exploited and developed across an artist's lifetime. ... More
A Unified Query-based Generative Model for Question Generation and Question AnsweringSep 04 2017Aug 28 2018We propose a query-based generative model for solving both tasks of question generation (QG) and question an- swering (QA). The model follows the classic encoder- decoder framework. The encoder takes a passage and a query as input then performs query ... More
Dynamic phase transition properties and hysteretic behavior of a ferrimagnetic core-shell nanoparticle in the presence of a time dependent magnetic fieldJul 09 2012Nov 16 2012We have presented dynamic phase transition features and stationary-state behavior of a ferrimagnetic small nanoparticle system with a core-shell structure. By means of detailed Monte Carlo simulations, a complete picture of the phase diagrams and magnetization ... More
$β$-Divergence loss for the kernel density estimation with bias reducedMar 25 2019Allthough nonparametric kernel density estimation with bias reduce is nowadays a standard technique in explorative data-analysis, there is still a big dispute on how to assess the quality of the estimate and which choice of bandwidth is optimal. This ... More
Random field effects on the phase diagrams of spin-1/2 Ising model on a honeycomb latticeDec 29 2010Ising model with quenched random magnetic fields is examined for single Gaussian, bimodal and double Gaussian random field distributions by introducing an effective field approximation that takes into account the correlations between different spins that ... More
Effective field theory analysis of 3D random field Ising model on isometric latticesMar 31 2011Ising model with quenched random magnetic fields is examined for single Gaussian, bimodal and double Gaussian random field distributions by introducing an effective field approximation that takes into account the correlations between different spins that ... More
Secure estimation and control for cyber-physical systems under adversarial attacksMay 22 2012The vast majority of today's critical infrastructure is supported by numerous feedback control loops and an attack on these control loops can have disastrous consequences. This is a major concern since modern control systems are becoming large and decentralized ... More
Sectoriality and essential spectrum of non symmetric graph LaplaciansJan 05 2018We consider a non self-adjoint Laplacian on a directed graph with non symmetric edge weights. We give necessary conditions for this Laplacian to be sectorial. We introduce a special self-adjoint operator and compare its essential spectrum with that of ... More
Polynomial-Time Proactive Synthesis of Tree-to-String Functions from ExamplesJan 16 2017May 24 2017Synthesis from examples enables non-expert users to generate programs by specifying examples of their behavior. A domain-specific form of such synthesis has been recently deployed in a widely used spreadsheet software product. In this paper we contribute ... More
Design and Assessment for Hybrid Courses: Insights and OverviewsNov 18 2018Technology is influencing education, providing new delivery and assessment models. A combination between online and traditional course, the hybrid (blended) course, may present a solution with many benefits as it provides a gradual transition towards ... More
Extending the Web3D: Design of Conventional GUI Libraries in X3DMar 08 2019Extensible 3D (X3D) modeling language is one of the leading Web3D technologies. Despite the rich functionality, the language does not currently provide tools for rapid development of conventional graphical user interfaces (GUIs). Every X3D author is responsible ... More
Sparse Array DFT Beamformers for Wideband SourcesJan 31 2019Sparse arrays are popular for performance optimization while keeping the hardware and computational costs down. In this paper, we consider sparse arrays design method for wideband source operating in a wideband jamming environment. Maximizing the signal-to-interference ... More
UML Artifacts Reuse: State of the ArtFeb 02 2014The benefits that can be derived from reusing software include accelerated development, reduced cost, reduced risk and effective use of specialists. Reuse of software artifacts during the initial stages of software development increases reuse benefits, ... More
A new effective field theory for spin-S (S<=1) dilute Ising ferromagnetsNov 12 2011Site diluted spin-1/2 Ising and spin-1 Blume Capel (BC) models in the presence of transverse field interactions are examined by introducing an effective-field approximation that takes into account the multi-site correlations in the cluster of a considered ... More
Exploiting the Tradeoff between Program Accuracy and Soft-error Resiliency Overhead for Machine Learning WorkloadsJul 09 2017To protect multicores from soft-error perturbations, resiliency schemes have been developed with high coverage but high power and performance overheads. Emerging safety-critical machine learning applications are increasingly being deployed on these platforms. ... More
Hysteretic response characteristics and dynamic phase transition via site dilution in the kinetic Ising modelJun 23 2012Oct 28 2013The decay of the hysteresis loop area of the system, which is obeying a site diluted kinetic Ising model, is considered by the disorder parameter using the effective field theory analysis. The exhibition focuses on the understanding of external field ... More
Localization for Random Unitary OperatorsApr 25 2005We consider unitary analogs of $1-$dimensional Anderson models on $l^2(\Z)$ defined by the product $U_\omega=D_\omega S$ where $S$ is a deterministic unitary and $D_\omega$ is a diagonal matrix of i.i.d. random phases. The operator $S$ is an absolutely ... More
Automated Analysis of Multi-View Software ArchitecturesApr 24 2017Software architectures usually are comprised of different views for capturing static, runtime, and deployment aspects. What is currently missing, however, are formal validation and verification techniques of multi-view architecture in very early phases ... More