Results for "Amru Hussein"

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Quantum graphs with mixed dynamics: the transport/diffusion caseSep 25 2012May 08 2013We introduce a class of partial differential equations on metric graphs associated with mixed evolution: on some edges we consider diffusion processes, on other ones transport phenomena. This yields a system of equations with possibly nonlocal couplings ... More
Primitive Equations with Horizontal Viscosity: The Initial Value and the Time-Periodic Problem for Physical Boundary ConditionsFeb 08 2019The $3D$-primitive equations with only horizontal viscosity are considered on a cylindrical domain $(-h,h)\times G$, $G\subset \mathbb{R}^2$ smooth, with the physical Dirichlet boundary conditions on the sides. Instead of considering a vanishing vertical ... More
Bounds on the negative eigenvalues of Laplacians on finite metric graphsNov 17 2012Jan 16 2013For a self--adjoint Laplace operator on a finite, not necessarily compact, metric graph lower and upper bounds on each of the negative eigenvalues are derived. For compact finite metric graphs Poincar\'{e} type inequalities are given.
Maximal-quasi-accretive Laplacians on finite metric graphsNov 17 2012Jan 16 2013For a finite not necessarily compact metric graph, one considers the differential expression $-\frac{d^2}{d x^2}$ on each edge. The boundary conditions at the vertices of the graph yielding quasi-m-accretive as well as m-accretive operators are completely ... More
Sign-indefinite second order differential operators on finite metric graphsNov 17 2012Jan 16 2013The question of self-adjoint realizations of sign-indefinite second order differential operators is discussed in terms of a model problem. Operators of the type $-\frac{d}{dx} \sgn (x) \frac{d}{dx}$ are generalized to finite, not necessarily compact, ... More
Global Strong $L^p$ Well-Posedness of the 3D Primitive Equations with Heat and Salinity DiffusionMay 09 2016Consider the full primitive equations, i.e. the three dimensional primitive equations coupled to the equation for temperature and salinity, and subject to outer forces. It is shown that this set of equations is globally strongly well-posed for arbitrary ... More
Non-self-adjoint graphsAug 20 2013On finite metric graphs we consider Laplace operators, subject to various classes of non-self-adjoint boundary conditions imposed at graph vertices. We investigate spectral properties, existence of a Riesz basis of projectors and similarity transforms ... More
Primitive Equations with Linearly Growing Initial DataOct 27 2017Oct 30 2017The primitive equations in a 3D infinite layer domain are considered with linearly growing initial data in the horizontal direction, which illustrates the global atmospheric rotating or straining flows. On the boundaries, Dirichlet, Neumann or mixed boundary ... More
The Hydrostatic Stokes Semigroup and Well-Posedness of the Primitive Equations on Spaces of Bounded FunctionsFeb 07 2018Consider the $3$-d primitive equations in a layer domain $\Omega=G \times (-h,0)$, $G=(0,1)^2$, subject to mixed Dirichlet and Neumann boundary conditions at $z=-h$ and $z=0$, respectively, and the periodic lateral boundary condition. It is shown that ... More
Rigorous justification of the hydrostatic approximation for the primitive equations by scaled Navier-Stokes equationsAug 07 2018Consider the anisotropic Navier-Stokes equations as well as the primitive equations. It is shown that the horizontal velocity of the solution to the anisotropic Navier-Stokes equations in a cylindrical domain of height $\varepsilon $ with initial data ... More
Jet schemes of toric surfaces (a short version)Dec 13 2010For $m\in \IN, m\geq 1,$ we determine the irreducible components of the $m-th$ jet scheme of a toric surface $S.$ For $m$ big enough, we connect the number of a class of these irreducible components to the number of exceptional divisors on the minimal ... More
Jet schemes of toric surfacesApr 21 2011For $m\in \mathbb{N}, m\geq 1,$ we determine the irreducible components of the $m-th$ jet scheme of a normal toric surface $S.$ We give formulas for the number of these components and their dimensions. When $m$ varies, these components give rise to projective ... More
Jet schemes of complex plane branches and equisingularitySep 29 2010For $m \in \mathbb{N}$, we determine the irreducible components of the $m$-th Jet Scheme of a complex branch $C$ and give formulas for their number $N(m)$ and for their codimensions, in terms of $m$ and the generators of the semigroup of $C$. This structure ... More
Jet schemes and generating sequences of divisorial valuations in dimension twoNov 12 2015Using the theory of jet schemes, we give a new approach to the description of a minimal generating sequence of a divisorial valuations on $\textbf{A}^2.$ For this purpose, we show how one can recover the approximate roots of an analytically irreducible ... More
New conjecture related to a conjecture of McIntoshFeb 06 2018We introduce a new conjecture on products of two distinct primes that would provide a partial answer to a conjecture of McIntosh. Also, $\binom{2p-1}{p-1}-1$ is written in terms of a polynomial in prime $p$ over the integers and we discuss one way this ... More
An identity for the odd double factorialNov 26 2018The ordinary factorial may be written in terms of the Stirling numbers of the second kind as shown by Quaintance and Gould and the odd double factorial in terms of the Stirling numbers of the first kind as shown by Callan. During the preparation of an ... More
Spatial Domain Watermarking Scheme for Colored Images Based on Log-average LuminanceJan 20 2010In this paper a new watermarking scheme is presented based on log-average luminance. A colored-image is divided into blocks after converting the RGB colored image to YCbCr color space. A monochrome image of 1024 bytes is used as the watermark. To embed ... More
Joint downscale fluxes of energy and potential enstrophy in rotating stratified Boussinesq flowsJul 25 2011Oct 03 2011We employ a coarse-graining approach to analyze nonlinear cascades in Boussinesq flows using high-resolution simulation data. We derive budgets which resolve the evolution of energy and potential enstrophy simultaneously in space and in scale. We then ... More
Gridscape II: A Customisable and Pluggable Grid Monitoring Portal and its Integration with Google MapsMay 12 2006Grid computing has emerged as an effective means of facilitating the sharing of distributed heterogeneous resources, enabling collaboration in large scale environments. However, the nature of Grid systems, coupled with the overabundance and fragmentation ... More
Robust Video Watermarking using Multi-Band Wavelet TransformDec 09 2009This paper addresses copyright protection as a major security demand in digital marketplaces. Two watermarking techniques are proposed and compared for compressed and uncompressed video with the intention to show the advantages and the possible weaknesses ... More
Necessary and sufficient conditions of optimal control for infinite dimensional SDEsFeb 17 2012Mar 20 2012A general maximum principle (necessary and sufficient conditions) for an optimal control problem governed by a stochastic differential equation driven by an infinite dimensional martingale is established. The solution of this equation takes its values ... More
Plancherel Theorem on the Symplectic Group SP(4,R)Aug 17 2016Let H be the 15- dimensional connected semisimple Lie group with its Iwasawa decomposition of H. Let G be the group of the semi direct product of H and the four dimensional real vector group . The goal of this paper is to define the Fourier transform ... More
Abstract Harmonic Analysis on the General Linear Group GL(n,R)Apr 20 2014Consider the general linear group, which is not connected but rather has two connected components, the matrices with positive determinant and the ones with negative determinant. Consider the Iwasawa decomposition of its special linear group. We adopt ... More
Plancherel Theorem and the Left Ideals of the Group Algebra for the Jacobi GroupJan 11 2016Let G be the three dimensional connected real semisimple Lie group and let KAN be the Iwasawa decomposition of G.Let J be the Jacobi group, which is the semidirect product of the two groups Heisenberg group with G. The Jacobi group plays an important ... More
A polyhedral characterization of quasi-ordinary singularitiesDec 23 2015Given an irreducible hypersurface singularity of dimension $ d $ (defined by a polynomial $ f\in K[[ {\bf x} ]][z]$) and the projection to the affine space defined by $ K [[ {\bf x} ]]$, we construct an invariant which detects whether the singularity ... More
Learning Hierarchical Interactions at Scale: A Convex Optimization ApproachFeb 05 2019Feb 06 2019In many learning settings, it is beneficial to augment the main features with pairwise interactions. Such interaction models can be often enhanced by performing variable selection under the so-called strong hierarchy constraint: an interaction is non-zero ... More
Jet schemes and minimal toric embedded resolutions of rational double point singularitiesOct 16 2015May 12 2017Using the structure of the jet schemes of rational double point singularities, we construct "minimal embedded toric resolutions" of these singularities. We also establish, for these singularities, a correspondence between a natural class of irreducible ... More
Perpendicular diffusion of energetic particles in noisy reduced magnetohydrodynamic turbulenceSep 08 2014Recently a model for noisy reduced magnetohydrodynamic turbulence was proposed. The latter model was already used to study the random walk of magnetic field lines. In the current article we use the same model to investigate the diffusion of energetic ... More
Quantum transport, master equations, and exchange fluctuationsMar 07 2014We investigate to which extent a many-body Bloch-Redfield master equation description of quantum transport is consistent with the exact generalized equilibrium conditions known as exchange fluctuation theorems. Thereby we identify a class of master equations ... More
Capacitively coupled nano conductors: Ratchet currents and exchange fluctuation relationsMar 02 2015We investigate electron transport in two quantum circuits with mutual Coulomb interaction. The first circuit is a double quantum dot connected to two electron reservoirs, while the second one is a quantum point contact in the weak tunneling limit. The ... More
Jet schemes and minimal toric embedded resolutions of rational double point singularitiesOct 16 2015Using the structure of the jet schemes of rational double point singularities, we construct "minimal embedded toric resolutions" of these singularities. We also define, for these singularities, a correspondence between a natural class of irreducible components ... More
Stochastic Texture Difference for Scale-Dependent Data AnalysisMar 11 2015Oct 05 2015This article introduces the Stochastic Texture Difference method for analyzing data at prescribed spatial and value scales. This method relies on constrained random walks around each pixel, describing how nearby image values typically evolve on each side ... More
Necessary conditions for optimality for stochastic evolution equationsOct 24 2012Aug 27 2013This paper is concerned with providing the maximum principle for a control problem governed by a stochastic evolution system on a separable Hilbert space. In particular, necessary conditions for optimality for this stochastic optimal control problem are ... More
Abstract Harmonic Analysis on SpacetimeApr 06 2014In this paper, we consider the Poincare group (space time). In mathematics, the Poincar\'e group of spacetime, named after Henri Poincar\'e, is the group of isometries of Minkowski spacetime, introduced by Hermann Minkowski. It is a non-abelian Lie group ... More
Adaptive Energy-aware Encoding for DWT-Based Wireless EEG Monitoring SystemMar 30 2013Jun 08 2013Wireless Electroencephalography (EEG) tele-monitoring systems performing encoding and streaming over energy-hungry wireless channels are limited in energy supply. However, excessive power consumption either in encoding or radio channel may render some ... More
Coherent quantum ratchets driven by tunnel oscillations: Fluctuations and correlationsJul 20 2012We study two capacitively coupled double quantum dots focusing on the regime in which one double dot is strongly biased, while no voltage is applied to the other. Then the latter experiences an effective driving force which induces a ratchet current, ... More
Abstract Harmonic Analysis On the non Singular Matrix Lie GroupJun 09 2016As well known that it is no way to do the abstract harmonic analysis on the non connected Lie groups. The goal of this paper is to draw the attention of Mathematicians to solve this problem. therefore let R be the group of nonzero real numbers with multiplication ... More
Abstract Harmonic Analysis on the General Affine Group GA(n,R)Apr 28 2014The general linear group has two components and its the identity component, which consists of the real matrices with positive determinant and the set of all matrices with negative determinant. Since the general linear group is a two copies of the group ... More
Abstract Harmonic Analysis and Group Algebra on the Group ANApr 13 2014Consider the Iwasawa decomposition of the real semisimple Lie group. The purpose of this paper is to define the Fourier transform in order to obtain the Plancherel theorem on its maxima solvable Lie group. Besides, we prove the existence theorems for ... More
Sufficient conditions for optimality for stochastic evolution equationsFeb 17 2012Oct 24 2012In this paper we derive for a controlled stochastic evolution system on a Hilbert space sufficient conditions for optimality. Our result is derived by using its so-called adjoint backward stochastic evolution equation.
Portfolio optimization near horizonNov 28 2016Portfolio optimization is a well-known problem in mathematical finance concerned with selecting a portfolio which will maximize the expected terminal utility of an investor given today's information and subject to some constraints. It has been studied ... More
A polyhedral characterization of quasi-ordinary singularitiesDec 23 2015May 28 2018Given an irreducible hypersurface singularity of dimension $d$ (defined by a polynomial $f\in K[[ {\bf x} ]][z]$) and the projection to the affine space defined by $K[[ {\bf x} ]]$, we construct an invariant which detects whether the singularity is quasi-ordinary ... More
Toward a microscopic description of reactions involving exotic nucleiJul 27 2013We propose an extension of the Continuum Discretized Coupled Channels (CDCC) method, where the projectile is described by a microscopic cluster model. This microscopic generalization (MCDCC) only relies on nucleon-target interactions, and therefore presents ... More
I-primary submodulesDec 07 2016In this paper, we give a generalization for weakly primary submodules called $I$-primary submodule and we study some properties of it. We give some characterizations of $I$-primary submodules. Also we establish the situation of $I$-primary submodules ... More
Existence and uniqueness of the solutions of forward-backward doubly stochastic differential equations with Poisson jumpsSep 06 2018Sep 18 2018The aim of this paper is to establish the existence and uniqueness of the solution to a system of nonlinear fully coupled forward-backward doubly stochastic differential equations with Poisson jumps. Our system is Markovian in the sense that initial and ... More
Assessment Issues in Mathematics: Design Science Approach for developing an Expert-System Based SolutionJun 08 2016Information and communication technology (ICT) tools are ineffective when assessing solutions of questions with more than one step. ICT tools assessing these types of questions are paralleled to solving complex problems. This conceptual paper describes ... More
Localness of energy cascade in hydrodynamic turbulence, I. Smooth coarse-grainingSep 13 2009We introduce a novel approach to scale-decomposition of the fluid kinetic energy (or other quadratic integrals) into band-pass contributions from a series of length-scales. Our decomposition is based on a multiscale generalization of the ``Germano identity'' ... More
Analyzing the performance of probabilistic algorithm in noisy manetsSep 02 2010Probabilistic broadcast has been widely used as a flooding optimization mechanism to alleviate the effect of broadcast storm problem (BSP) in mobile ad hoc networks (MANETs). Many research studies have been carried-out to develop and evaluate the performance ... More
Performance Evaluation of an OMPR Algorithm for Route Discovery in Noisy MANETsSep 02 2010It has been revealed in the literature that pure multipoint relaying (MPR) algorithms demonstrate both simplicity and outstanding performance, as compared to other flooding algorithms in wireless networks. One drawback of pure MPR algorithms is that the ... More
Ultra cold neutrons: determination of the electric dipole moment and gravitational corrections via matter wave interferometryMay 03 2004Jan 07 2005We propose experiments using ultra cold neutrons which can be used to determine the electric dipole moment of the neutron itself, a well as to test corrections to gravity as they are foreseen by string theories and Kaluza-Klein mechanisms.
Scale-Locality of Magnetohydrodynamic TurbulenceDec 18 2009We investigate the scale-locality of cascades of conserved invariants at high kinetic and magnetic Reynolds numbers in the ``inertial-inductive range'' of magnetohydrodynamic (MHD) turbulence, where velocity and magnetic field increments exhibit suitable ... More
Localness of energy cascade in hydrodynamic turbulence, II. Sharp spectral filterSep 14 2009We investigate the scale-locality of subgrid-scale (SGS) energy flux and inter-band energy transfers defined by the sharp spectral filter. We show by rigorous bounds, physical arguments and numerical simulations that the spectral SGS flux is dominated ... More
Thermodynamic Treatment of High Energy Heavy Ion CollisionNov 03 2013The hadron production in heavy ion collision is treated in the framework of thermodynamic vision. Thermodynamic system formed during central collision of Pb-Pb at high energies is considered, through which binary collision is assumed among the valance ... More
Machine Teaching in Hierarchical Genetic Reinforcement Learning: Curriculum Design of Reward Functions for Swarm ShepherdingJan 04 2019The design of reward functions in reinforcement learning is a human skill that comes with experience. Unfortunately, there is not any methodology in the literature that could guide a human to design the reward function or to allow a human to transfer ... More
Defect and Local UniformizationNov 07 2017We give a simple algorithm showing that the reduction of the multiplicity of a characteristic p>0 hypersurface singularity along a valuation is possible if there is a finite linear projection which is defectless. The method begins with the algorithm of ... More
The Affects of Different Queuing Algorithms within the Router on QoS VoIP application Using OPNETFeb 07 2013Voice over Internet Protocol is a service from the Internet services that allows users to communicate with each other. Quality of Service is very sensitive to delay so that Voice over Internet Protocol needs it. The objective of this research is to study ... More
Exit Doorway Model for Nuclear Breakup of Weakly Bound ProjectilesNov 18 2007We derive closed expressions for the nuclear breakup cross sections in the adiabatic limit using the Austern-Blair theory. These expressions are appropriate for the breakup of weakly bound nuclei. The concept of an exit doorway that mediates the coupling ... More
Maximum principle for optimal control of forward-backward doubly stochastic differential equations with jumpsJan 09 2013Aug 27 2013In this paper we consider the maximum principle of optimal control for a stochastic control problem. This problem is governed by a system of fully coupled multi-dimensional forward-backward doubly stochastic differential equation with Poisson jumps. Moreover, ... More
The Moore-Penrose Pseudoinverse. A Tutorial Review of the TheoryOct 31 2011In the last decades the Moore-Penrose pseudoinverse has found a wide range of applications in many areas of Science and became a useful tool for physicists dealing, for instance, with optimization problems, with data analysis, with the solution of linear ... More
van der Waals and Casimir-Polder interactions between neutronsDec 17 2015We investigate the van der Waals interaction between neutrons using the theory of Casimir and Polder, wherein the potential for asymptotically large separations falls off as the inverse seventh power, and compare it to the similar interaction between ... More
On "Do the attractive bosons condense?" by N. K. Wilkin, J. M. F. Gunn, R. A. SmithAug 14 2001Mar 14 2002Using Perron-Frobenius theorem, we prove that the results by Wilkin, Gunn and Smith [1] for the ground states of N Bose atoms rotating at the angular momentum L in a harmonic atomic trap with frequency omega interacting via attractive delta^2(r) forces, ... More
Distribution of matrix elements of random operatorsJul 15 1999It is shown that an operator can be defined in the abstract space of random matrices ensembles whose matrix elements statistical distribution simulates the behavior of the distribution found in real physical systems. It is found that the key quantity ... More
Canonical quantum potential scattering theoryJul 13 2008A new formulation of potential scattering in quantum mechanics is developed using a close structural analogy between partial waves and the classical dynamics of many non-interacting fields. Using a canonical formalism we find non-linear first-order differential ... More
The Influence of Different Turbulence Models on the Diffusion Coefficients of Energetic ParticlesMay 19 2015We explore the influence of turbulence on the transport of energetic particles by using test-particle simulations. We compute parallel and perpendicular diffusion coefficients for two-component turbulence, isotropic turbulence, a model based on Goldreich-Sridhar ... More
Arc Spaces and Rogers-Ramanujan IdentitiesJan 25 2011Feb 07 2011Arc spaces have been introduced in algebraic geometry as a tool to study singularities but they show strong connections with combinatorics as well. Exploiting these relations we obtain a new approach to the classical Rogers-Ramanujan Identities. The linking ... More
A Review of Theoretical and Practical Challenges of Trusted Autonomy in Big DataMar 16 2016Despite the advances made in artificial intelligence, software agents, and robotics, there is little we see today that we can truly call a fully autonomous system. We conjecture that the main inhibitor for advancing autonomy is lack of trust. Trusted ... More
Multiuser Switched Diversity Scheduling SchemesApr 12 2012Multiuser switched-diversity scheduling schemes were recently proposed in order to overcome the heavy feedback requirements of conventional opportunistic scheduling schemes by applying a threshold-based, distributed, and ordered scheduling mechanism. ... More
Ground states of a system of interacting particles in a parabolic trapAug 20 2001Within the "lowest Landau level approximation", we develop a method to find the ground state of a 2d system of interacting particles confined by a parabolic potential.
Network Multiple-Input and Multiple-Output for Wireless Local Area NetworksFeb 08 2014May 05 2014This paper presents a tutorial for network multiple-input and multiple-output (netMIMO) in wireless local area networks (WLAN). Wireless traffic demand is growing exponentially. NetMIMO allows access points (APs) in a WLAN to cooperate in their transmissions ... More
The direct enstrophy cascade of two-dimensional soap film flowsSep 19 2013Apr 10 2014We investigate the direct enstrophy cascade of two-dimensional decaying turbulence in a flowing soap film channel. We use a coarse-graining approach that allows us to resolve the nonlinear dynamics and scale-coupling simultaneously in space and in scale. ... More
Nanophononic metamaterial: Thermal conductivity reduction by local resonanceApr 22 2013Jul 30 2013We present the concept of a locally resonant nanophononic metamaterial for thermoelectric energy conversion. Our configuration, which is based on a silicon thin-film with a periodic array of pillars erected on one or two of the free surfaces, qualitatively ... More
The conservative cascade of kinetic energy in compressible turbulenceJul 28 2011Aug 22 2011The physical nature of compressible turbulence is of fundamental importance in a variety of astrophysical settings. We present the first direct evidence that mean kinetic energy cascades conservatively beyond a transitional "conversion" scale-range despite ... More
Monitoring quantum transport: Backaction and measurement correlationsJul 10 2014We investigate a tunnel contact coupled to a double quantum dot (DQD) and employed as charge monitor for the latter. We consider both the classical limit and the quantum regime. In the classical case, we derive measurement correlations from conditional ... More
Multi-Target Tracking Using A Randomized Hypothesis Generation TechniqueMar 13 2016In this paper, we present a randomized version of the finite set statistics (FISST) Bayesian recursions for multi-object tracking problems. We propose a hypothesis level derivation of the FISST equations that shows that the multi-object tracking problem ... More
Current Status of Nuclear Physics ResearchSep 01 2015Sep 17 2015In this review we discuss the current status of research in nuclear physics which is being carried out in different centers in the World. For this purpose we supply a short account of the development in the area which evolved over the last 9 decades, ... More
Fractal Structure of Random MatricesJul 14 1999A multifractal analysis is performed on the universality classes of random matrices and the transition ones.Our results indicate that the eigenvector probability distribution is a linear sum of two chi-squared distribution throughout the transition between ... More
Phenomenology of Large Extra Dimensions Models at Hadrons Colliders using Monte Carlo Techniques (Spin-2 Graviton)Jul 14 2015Large Extra Dimensions Models have been proposed to remove the hierarchy problem and give an explanation why the gravity is so much weaker than the other three forces. In this work, we present an analysis of Monte Carlo data events for new physics signatures ... More
Search for New Charged Gauge Boson $W'$ via Phenomenology of the Left-Right Symmetric Model at Hadron CollidersJun 12 2014Aug 08 2014In this article, a search for signatures of the hypothetical new heavy charged gauge boson $W'$ in proton-proton collisions at the Large Hadron Collider (LHC) with center-of-mass energy range from 6 to 14 TeV and in proton-antiproton collisions at the ... More
High Energy Electron Proton Scattering in View of Born ApproximationJan 11 1996Jun 30 1996The hadronic quark structure is investigated in the frame of high energy electron proton scattering. A phenomenological model based on the Born approximation is used to calculate the transition matrix element for the quark system forming the proton target. ... More
Semi-classical scattering in two dimensionsJun 04 2008Jun 06 2008The semi-classical limit of quantum-mechanical scattering in two dimensions (2D) is developed. We derive the Wentzel-Kramers-Brillouin and Eikonal results for 2D scattering. No backward or forward glory scattering is present in 2D. Other phenomena, such ... More
Optimal Training for Non-Feedback Adaptive PSAM over Time-Varying Rayleigh Fading ChannelsApr 14 2015Oct 14 2015Time-varying fast fading channels present a major challenge in the design of wireless communication systems. Pilot Symbol Assisted Modulation (PSAM) has been introduced to mitigate the effects of fading and allow coherent demodulation. Our work studies ... More
Matrix Elements of Random Operators and Discrete Symmetry Breaking in NucleiMar 11 2002It is shown that several effects are responsible for deviations of the intensity distributions from the Porter-Thomas law. Among these are genuine symmetry breaking, such as isospin; the nature of the transition operator; truncation of the Hilbert space ... More
Condensed vortex ground states of rotating Bose-Einstein condensate in harmonic atomic trapDec 29 2001Mar 13 2002We study a system of $N$ Bose atoms trapped by a symmetric harmonic potential, interacting via weak central forces. Considering the ground state of the rotating system as a function of the two conserved quantities, the total angular momentum and its collective ... More
Network Traffic Anomaly DetectionFeb 04 2014This paper presents a tutorial for network anomaly detection, focusing on non-signature-based approaches. Network traffic anomalies are unusual and significant changes in the traffic of a network. Networks play an important role in today's social and ... More
Optimal Multi-Server Allocation to Parallel Queues With Independent Random Queue-Server ConnectivityMar 08 2011Apr 08 2011We investigate an optimal scheduling problem in a discrete-time system of L parallel queues that are served by K identical, randomly connected servers. Each queue may be connected to a subset of the K servers during any given time slot. This model has ... More
A Network Calculus Approach for the Analysis of Multi-Hop Fading ChannelsJul 27 2012A fundamental problem in the delay and backlog analysis across multi-hop paths in wireless networks is how to account for the random properties of the wireless channel. Since the usual statistical models for radio signals in a propagation environment ... More
Near-Far Description of Elastic and Breakup Reactions of Halo NucleiAug 21 2012The angular distributions for elastic scattering and breakup of halo nuclei are analysed using a near-side/far-side decomposition within the framework of the dynamical eikonal approximation. This analysis is performed for 11Be impinging on Pb at 69AMeV. ... More
Distributed Cooperative Q-learning for Power Allocation in Cognitive Femtocell NetworksMar 18 2012In this paper, we propose a distributed reinforcement learning (RL) technique called distributed power control using Q-learning (DPC-Q) to manage the interference caused by the femtocells on macro-users in the downlink. The DPC-Q leverages Q-Learning ... More
Multi-Object Tracking with Multiple Birth, Death, and Spawn Scenarios Using A Randomized Hypothesis Generation Technique (R-FISST)Mar 24 2016In multi-object tracking one may encounter situations were at any time step the number of possible hypotheses is too large to generate exhaustively. These situations generally occur when there are multiple ambiguous measurement returns that can be associated ... More
Heat pump driven by the shot noise of a tunnel contactJul 15 2015We investigate a mechanism for cooling a lead based on a process that replaces hot electrons by cold ones. The central idea is that a double quantum dot with an inhomogeneous Zeeman splitting acts as energy filter for the transported electrons. The setup ... More
Thermal transport size effects in silicon membranes featuring nanopillars as local resonatorsMay 10 2016Silicon membranes patterned by nanometer-scale pillars standing on the surface provide a practical platform for thermal conductivity reduction by resonance hybridization. Using molecular simulations, we investigate the effect of nanopillar size, unit-cell ... More
Generalized yrast states of a Bose condensate in harmonic trap for a universality class of repulsive interactionsFeb 28 2001For a system of N bosons in a 2d harmonic trap with frequency omega, interacting via repulsive forces V<<omega, we develop supersymmetric method to find the lowest energy states of rotating Bose condensate as function of two quantum numbers, the total ... More
Neural Networks Search for Charged Higgs Boson of Two Doublet Higgs Model at the Hadrons CollidersJul 23 2015In this work, we present an analysis of a search for charged Higgs boson in the context of Two Doublet Higgs Model (2HDM) which is an extension of the Standard Model of particles physics. The 2HDM predicts by existence scalar sector with new five Higgs ... More
Phenomenology of Hidden Abelian Higgs Model at Hadron Colliders using Neural Networks and Monte Carlo Techniques (Gauge Sector $Z_{HAHM}$ & Scalar Sector H)Jul 09 2015The Hidden Abelian Higgs Model (HAHM) is an extension of the Standard Model based on the gauge group $G =SU(3)_{C} \times SU(2)_{L} \times U(1)_{Y} \times U(1)_{X}$ i.e. an extra $U(1)_{X}$ gauge group in addition to the SM gauge groups.In HAHM, an Abelian ... More
Optimal Control of Underactuated Nonholonomic Mechanical SystemsOct 01 2005In this paper we use an affine connection formulation to study an optimal control problem for a class of nonholonomic, under-actuated mechanical systems. In particular, we aim at minimizing the norm-squared of the control input to move the system from ... More
Influence of the halo upon angular distributions for elastic scattering and breakupAug 27 2010The angular distributions for elastic scattering and breakup of halo nuclei are analysed using a near-side/far-side decomposition within the framework of the dynamical eikonal approximation. This analysis is performed for 11Be impinging on Pb at 69 MeV/nucleon. ... More
Linear-time Online Action Detection From 3D Skeletal Data Using Bags of GestureletsFeb 04 2015Dec 28 2015Sliding window is one direct way to extend a successful recognition system to handle the more challenging detection problem. While action recognition decides only whether or not an action is present in a pre-segmented video sequence, action detection ... More
A Cooperative Q-learning Approach for Real-time Power Allocation in Femtocell NetworksMar 12 2013In this paper, we address the problem of distributed interference management of cognitive femtocells that share the same frequency range with macrocells (primary user) using distributed multi-agent Q-learning. We formulate and solve three problems representing ... More
Geometry of Borromean Halo NucleiMay 28 2007Nov 07 2007We discuss the geometry of the highly quantal nuclear three-body systems composed of a core plus two loosely bound particles. These Borromean nuclei have no single bound two-body subsystem. Correlation plays a prominent role. From consideration of the ... More
Dynamic Packet Scheduler Optimization in Wireless Relay NetworksApr 15 2011In this work, we investigate the optimal dynamic packet scheduling policy in a wireless relay network (WRN). We model this network by two sets of parallel queues, that represent the subscriber stations (SS) and the relay stations (RS), with random link ... More