Results for "M. Abu-Shady"

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Trigonometric Rosen-Morse Potential as the Quark-Antiquark Interaction Potential for Meson Properties in the Non-Relativistic Quark Model Using EAIMMay 14 2019Trigonometric Rosen-Morse potential is suggested as the quark-antiquark interaction potential for studying the thermodynamic properties and the masses of heavy and heavy-light mesons. For this purpose, N-radial Schrodinger equation is analytically solved ... More
Analytic Solution of Dirac Equation for Extended Cornell Potential Using the Nikiforov-Uvarov MethodJul 14 2015The extended Cornell potential which the harmonic oscillator potential is included in the original Cornell potential. The Dirac equation is solved by reducing the Dirac equation to the form of Schrodinger equation. The Nikiforov-Uvarov method is applied ... More
Magnetic Catalysis in the Higher-Order Quark Sigma ModelDec 07 2016The effect of the higher-order mesonic interactions is investigated on the chiral symmetry breaking in the presence of an external magnetic field. The effective of higher-order mesonic potential is employed and is numerically solved in the mean-field ... More
Nucleon Properties in the Quantized Linear Sigma Model at Finite Temperature and Chemical PotentialJul 08 2015Jul 25 2015The linear sigma model at finite temperature and chemical potential is systematically studied using the coherent-pair approximation, in which fully taking quantum of fields are included. The expectation value of the chiral Hamiltonian density is minimized ... More
Analytic Solution of Multi-Dimensional Schrodinger in Hot and Dense QCD Media Using SUSYQM MethodMar 06 2019The N-radial Schr\"odinger equation is analytically solved by using SUSYQM method, in which the heavy quarkonia potential is introduced at finite temperature and baryon chemical potential. The energy eigenvalue is calculated in the N-dimensional space. ... More
Inactivation cross section induced by heavy ions of different energies in Bacterial cells of E. coli: an analytical approachMar 27 2019An analytical inactivation cross section formula based on the analytical formula for calculating the radial dose distribution of Awad et al. (Awad et al., 2018) was proposed. The formula is a multi-hit model based on the track structure theory of Katz ... More
Quarkonium Masses in the N-dimensional Space Using the Analytical Exact Iteration MethodDec 24 2016The N-dimensional radial Schrodinger equation with an extended Cornell potential is solved. The analytical exact iteration method is applied. The energy eigenvalues are calculated in the N-dimensional space. The charmonium meson, the bottomonium meson ... More
Exact Solution of the N-dimensional Radial Schrödinger Equation via Laplace Transformation Method with the Generalized Cornell PotentialFeb 06 2018The exact solution of N- dimensional radial Schr\"odinger equation with the generalized Cornell potential has been obtained using the Laplace transformation (LT) method. The energy eigenvalues and the corresponding wave functions for any state have been ... More
Hadron Properties in a Chiral Quark-Sigma ModelOct 12 2011Within a chiral quark sigma model in which quarks interact via the exchange of sigma and pi-mesons, hadron properties are investigated. This model of the nucleon and delta is based on the idea that strong QCD forces on very short distances (a small length ... More
On Montel's theorem in several variablesOct 12 2013Jan 05 2014Recently, the first author of this paper, used the structure of finite dimensional translation invariant subspaces of C(R,C) to give a new proof of classical Montel's theorem, about continuous solutions of Fr\'{e}chet's functional equation $\Delta_h^mf=0$, ... More
Masses and Thermodynamics Properties of Heavy Mesons in the Non-Relativistic Quark Model Using Nikiforov-Uvarov MethodJan 02 2019Thermodynamics properties of heavy mesons are calculated within the framework of the N-dimensional radial Schrodinger equation. The Cornell potential is extended by including the quadratic potential plus the inverse of quadratic potential. The energy ... More
Mapping of the 2+1 Dirac-Moshinsky Oscillator Coupled to an External Isospin Field onto Jaynes-Cummings ModelDec 01 2018In this paper, the 2+1 Dirac-Moshinsky oscillator (2+1 DMO) coupled to an external isospin field is mapped onto the Jaynes-Cummings model (JCM), which describes the interaction between two two-level systems and a quantum single-mode field. The time-dependent ... More
Effect of an External Magnetic Field on Some Statistical Properties of the 2+1 Dirac-Moshinsky OscillatorApr 20 2019The 2+1 Dirac-Moshinsky oscillator ( 2+1 DMO ) is mapped into the generalized Jaynes-Cummings model (GJCM), in which an external magnetic field is coupled to an external isospin field. The basic equations of model are analytically solved, where the coherent ... More
A New Efficient Asymmetric Cryptosystem Based on the Square Root ProblemJul 05 2012Nov 14 2012The square root modulo problem is a known primitive in designing an asymmetric cryptosystem. It was first attempted by Rabin. Decryption failure of the Rabin cryptosystem caused by the 4-to-1 decryption output is overcome efficiently in this work. The ... More
Security Features of an Asymmetric Cryptosystem based on the Diophantine Equation Hard ProblemMar 23 2011Dec 22 2011The Diophantine Equation Hard Problem (DEHP) is a potential cryptographic problem on the Diophantine equation $U=\sum \limits_{i=1}^n {V_i x_{i}}$. A proper implementation of DEHP would render an attacker to search for private parameters amongst the exponentially ... More
Continuous Spin Representations of the Poincaré and Super-Poincaré GroupsMay 15 2002We construct Wigner's continuous spin representations of the Poincar\'e algebra for massless particles in higher dimensions. The states are labeled both by the length of a space-like translation vector and the Dynkin indices of the {\it short little group} ... More
Modelling Noise and Pulse Width Modulation Interference in Indoor Visible Light Communication ChannelsFeb 19 2019Visible light communication (VLC) has the potential to supplement the growing demand for wireless connectivity. In order to realise the full potential of VLC, channel models are required Discrete channel models based on semi-hidden Markov models (Fritchman ... More
Extreme points method and univalent harmonic mappingsDec 24 2014We consider the class of all sense-preserving complex-valued harmonic mappings $f=h+\bar {g}$ defined on the unit disk $\ID$ with the normalization $h(0)=h'(0)-1=0$ and $g(0)=g'(0)=0$ with the second complex dilatation $\omega:\,\ID\rightarrow \ID$, $g'(z)=\omega ... More
When will you do what? - Anticipating Temporal Occurrences of ActivitiesApr 03 2018Analyzing human actions in videos has gained increased attention recently. While most works focus on classifying and labeling observed video frames or anticipating the very recent future, making long-term predictions over more than just a few seconds ... More
A SQP Based Line Search Method for Multi-objective Optimization ProblemsDec 10 2018In this paper a globally convergent sequential quadratic programming (SQP) method is developed for multi-objective optimization problems with inequality type constraints. A feasible descent direction is obtained using a linear approximation of all objective ... More
Pion condensation during the hadronization of the quark-gluon plasma in ultra-relativistic heavy-ion collisions.Feb 10 1995Feb 13 1995Using a simple kinetic model we study whether a pion condensate can be formed during the hadronization of the quark-gluon plasma in ultrarelativistic heavy-ion collisions. If hadronization proceeds fast and the pion effective mass is close to zero, some ... More
Software Agents Interaction Algorithms in Virtual Learning EnvironmentMar 23 2014Dec 07 2015This paper highlights the multi-agent learning virtual environment and agents communication algorithms. The researcher proposed three algorithms required software agents interaction in virtual learning information system environment. The first proposed ... More
A description of odd mass Xe and Te isotopes in the Interacting Boson-Fermion ModelApr 16 2013Recent interest in spectroscopic factors for single-neutron transfer in low-spin states of the even-odd Xenon $^{125,127,129.131}$Xe and even-odd Tellurium, $^{123,125,127,129,131}$Te isotopes stimulated us to study these isotopes within the frame work ... More
VANET Routing Protocols: Pros and ConsApr 05 2012VANET (Vehicular Ad-hoc Network) is a new technology which has taken enormous attention in the recent years. Due to rapid topology changing and frequent disconnection makes it difficult to design an efficient routing protocol for routing data among vehicles, ... More
Inertial Manifolds for Certain Sub-Grid Scale $α$-Models of TurbulenceSep 16 2014In this note we prove the existence of an inertial manifold, i.e., a global invariant, exponentially attracting, finite-dimensional smooth manifold, for two different sub-grid scale $\alpha$-models of turbulence: the simplified Bardina model and the modified ... More
F-Index of Some Graph OperationsNov 20 2015The F-index of a graph is defined as the sum of cubes of the vertex degrees of the graph. This was introduced in 1972, in the same paper where the first and second Zagreb indices were introduced to study the structure-dependency of total $\pi$-electron ... More
Partitioning a graph into degenerate subgraphsMar 12 2018Let $G = (V, E)$ be a graph with maximum degree $k\geq 3$ distinct from $K_{k+1}$. Given integers $s \geq 2$ and $p_1,\ldots,p_s\geq 0$, $G$ is said to be $(p_1, \dots, p_s)$-partitionable if there exists a partition of $V$ into sets~$V_1,\ldots,V_s$ ... More
Continuous Spin Representations from Group ContractionOct 11 2004Mar 04 2005We consider how the continuous spin representation (CSR) of the Poincare group in four dimensions can be generated by dimensional reduction. The analysis uses the front-form little group in five dimensions, which must yield the Euclidean group E(2), the ... More
Performance Evaluation of AODV & DSR with Varying Pause Time & Speed Time Over TCP & CBR Connections in VANETMar 15 2012VANET (Vehicular Ad-hoc Network) is a new technology which has taken enormous attention in the recent years. Vehicular ad hoc network is formed by cars which are called nodes; allow them to communicate with one another without using any fixed road side ... More
Generalized optimal sub-pattern assignment metricJan 21 2016Sep 12 2018This paper presents the generalized optimal sub-pattern assignment (GOSPA) metric on the space of finite sets of targets. Compared to the well-established optimal sub-pattern assignment (OSPA) metric, GOSPA is unnormalized as a function of the cardinality ... More
3-Phase Recognition Approach to Pseudo 3D Building Generation from 2D Floor PlanJul 19 2011Nowadays three dimension (3D) architectural visualisation has become a powerful tool in the conceptualisation, design and presentation of architectural products in the construction industry, providing realistic interaction and walkthrough on engineering ... More
PV-Powered CoMP-Based Green Cellular Networks with a Standby Grid SupplyFeb 23 2018This paper proposes a novel framework for PV-powered cellular networks with a standby grid supply and an essential energy management technique for achieving envisaged green networks. The proposal considers an emerging cellular network architecture employing ... More
NileTMRG at SemEval-2017 Task 4: Arabic Sentiment AnalysisOct 23 2017This paper describes two systems that were used by the authors for addressing Arabic Sentiment Analysis as part of SemEval-2017, task 4. The authors participated in three Arabic related subtasks which are: Subtask A (Message Polarity Classification), ... More
Center Emphasized Visual Saliency and a Contrast-based Full Reference Image Quality IndexDec 28 2018Feb 26 2019Objective image quality assessment (IQA) is imperative in the current multimedia-intensive world, in order to assess the visual quality of an image at close to a human level of ability. Many~parameters such as color intensity, structure, sharpness, contrast, ... More
A p-adic Montel theorem and locally polynomial functionsFeb 17 2013We prove a version of both Jacobi's and Montel's Theorems for the case of continuous functions defined over the field $\mathbb{Q}_p$ of $p$-adic numbers. In particular, we prove that, if \[ \Delta_{h_0}^{m+1}f(x)=0 \ \ \text{for all} x\in\mathbb{Q}_p, ... More
The Limit Behavior Of The Trajectories of Dissipative Quadratic Stochastic Operators on Finite Dimensional SimplexDec 15 2011The limit behavior of trajectories of dissipative quadratic stochastic operators on a finite-dimensional simplex is fully studied. It is shown that any dissipative quadratic stochastic operator has either unique or infinitely many fixed points. If dissipative ... More
A qualitative description of graphs of discontinuous polynomial functionsJan 14 2014Jan 19 2014We prove that, if f:R^n\to R satisfies Fr\'echet's functional equation and f(x_1,...,x_n) is not an ordinary algebraic polynomial in the variables x_1,...,x_n, then f is unbounded on all non-empty open set U of R^n. Furthermore, the closure of its graph ... More
Theory of strong-field ionization of aligned CO2Jun 04 2009Jun 17 2009A theoretical framework for studying strong-field ionization of aligned molecules is presented, and alignment-dependent ionization yields are computed for CO2. Our calculations are in unprecedented agreement with recent experiments. We find that the ionization ... More
A note on monomialsMar 14 2012We study discontinuous solutions of the monomial equation $\frac{1}{n!}\Delta_h^nf(x)=f(h)$. In particular, we characterize the closure of their graph, $\bar{G(f)}^{\mathbb{R}^2}$, and we use the properties of these functions to present a new proof of ... More
Los teoremas de Fréchet, Montel y Popoviciu y los grafos de los polinomios discontinuosFeb 10 2015This paper is an introduction to the regularity theory of functional equations, motivated by the study of Fr\'{e}chet's functional equation. Another main goal is to honor the work in functional equations of the Romanian mathematician Tiberiu Popoviciu. ... More
A note on invariant subspaces and the solution of some classical functional equationsOct 29 2013We study the continuous solutions of several classical functional equations by using the properties of the spaces of continuous functions which are invariant under some elementary linear trans-formations. Concretely, we use that the sets of continuous ... More
The role of light ellipticity in ionization of atoms by intense few-cycles laser pulsesApr 22 2010We provide theoretical investigations of the response of the Ar and H atoms to an intense elliptically polarized few-cycle laser pulse, as a function of light ellipticity. The time-dependent Schr{\"o}dinger equation describing the least-bound electron ... More
On solutions of $f(x)+f(a_1x)+...+f(a_Nx)=0$ and related equationsNov 02 2011Feb 20 2012We study some properties of the solutions of the functional equation $$f(x)+f(a_1x)+...+f(a_Nx)=0,$$ which was introduced in the literature by Mora, Cherruault and Ziadi in 1999, for the case $a_k=k+1$, $k=1,2,...,N$ and studied by Mora in 2008 and Mora ... More
Uncertainty-Aware Imitation Learning using Kernelized Movement PrimitivesMar 05 2019Mar 11 2019During the past few years, probabilistic approaches to imitation learning have earned a relevant place in the literature. One of their most prominent features, in addition to extracting a mean trajectory from task demonstrations, is that they provide ... More
Comparison of several data-driven nonlinear system identification methods on a simplified glucoregulatory system exampleApr 19 2018In this paper, several advanced data-driven nonlinear identification techniques are compared on a specific problem: a simplified glucoregulatory system modeling example. This problem represents a challenge in the development of an artificial pancreas ... More
Augmented Reality Meets Computer Vision : Efficient Data Generation for Urban Driving ScenesAug 04 2017The success of deep learning in computer vision is based on availability of large annotated datasets. To lower the need for hand labeled images, virtually rendered 3D worlds have recently gained popularity. Creating realistic 3D content is challenging ... More
Approximation and Heuristic Algorithms for Computing Backbones in Asymmetric Ad-Hoc NetworksOct 07 2015We consider the problem of dominating set-based virtual backbone used for routing in asymmetric wireless ad-hoc networks. These networks have non-uniform transmission ranges and are modeled using the well-established disk graphs. The corresponding graph ... More
Distance and Similarity Measures Effect on the Performance of K-Nearest Neighbor Classifier - A ReviewAug 14 2017The K-nearest neighbor (KNN) classifier is one of the simplest and most common classifiers, yet its performance competes with the most complex classifiers in the literature. The core of this classifier depends mainly on measuring the distance or similarity ... More
The El-Gamal AA_β Public Key Cryptosystem - A new approach utilizing the subset sum problem in designing an asymmetric cryptosystemDec 27 2010Feb 14 2011The El-Gamal AA_{\beta} Public Key Cryptosystem is a new asymmetric cryptosystem based on the piecewise AA_{\beta}-function. The AA_{\beta}-function which is essentially a one way Boolean function was motivated by the squaring and multiplying process ... More
Resurgence numbers of fiber products of projective schemesJan 23 2019Apr 22 2019We investigate the resurgence and asymptotic resurgence numbers of fiber products of projective schemes. Particularly, we show that while the asymptotic resurgence number of the k-fold fiber product of a projective scheme remains unchanged, its resurgence ... More
On the Bohr inequalityDec 02 2016The Bohr inequality, first introduced by Harald Bohr in 1914, deals with finding the largest radius $r$, $0<r<1$, such that $\sum_{n=0}^\infty |a_n|r^n \leq 1$ holds whenever $|\sum_{n=0}^\infty a_nz^n|\leq 1$ in the unit disk $\mathbb{D}$ of the complex ... More
A Constructive Algorithm for Feedforward Neural Networks for Medical Diagnostic ReasoningSep 23 2010This research is to search for alternatives to the resolution of complex medical diagnosis where human knowledge should be apprehended in a general fashion. Successful application examples show that human diagnostic capabilities are significantly worse ... More
Ionization of oriented targets by intense circularly polarized laser pulses: Imprints of orbital angular nodes in the 2D momentum distributionApr 09 2010We solve the three-dimensional time-dependent Schr\"{o}dinger equation for a few-cycle circularly polarized femtosecond laser pulse interacting with an oriented target exemplified by an Argon atom, initially in a $3\text{p}_{x}$ or $3\text{p}_{y}$ state. ... More
High-order harmonic generation from polyatomic molecules including nuclear motion and a nuclear modes analysisJan 27 2010Mar 26 2010We present a generic approach for treating the effect of nuclear motion in the high-order harmonic generation from polyatomic molecules. Our procedure relies on a separation of nuclear and electron dynamics where we account for the electronic part using ... More
An innovative platform to improve the performance of exact string matching algorithmsFeb 11 2010Exact String Matching is an essential issue in many computer science applications. Unfortunately, the performance of Exact String Matching algorithms, namely, executing time, does not address the needs of these applications. This paper proposes a general ... More
The Characteristics of the Factors That Govern the Preferred Force in the Social Force Model of Pedestrian MovementAug 01 2010The social force model which belongs to the microscopic pedestrian studies has been considered as the supremacy by many researchers and due to the main feature of reproducing the self-organized phenomena resulted from pedestrian dynamic. The Preferred ... More
The spherical metric and univalent harmonic mappingsJul 16 2018Let $f=h+\overline{g}$ be a harmonic univalent map in the unit disk $\mathbb{D}$, where $h $ and $g$ are analytic. We obtain an improved estimate for the second coefficient of $h$. This indeed is the first qualitative improvement after the appearance ... More
Scaling behavior in steady-state contractile actomyosin network flowMay 23 2018Contractile actomyosin network flows are crucial for many cellular processes including cell division and motility, morphogenesis and transport. How local remodeling of actin architecture tunes stress production and dissipation and regulates large-scale ... More
Indications of Proton-Dominated Cosmic Ray Composition above 1.6 EeVOct 21 2009Apr 03 2010We report studies of ultra-high energy cosmic ray composition via analysis of depth of airshower maximum (Xmax), for airshower events collected by the High Resolution Fly's Eye (HiRes) observatory. The HiRes data are consistent with a constant elongation ... More
A dynamic closure modeling framework for model order reduction of geophysical flowsFeb 20 2019In this paper, a dynamic closure modeling approach has been derived to stabilize the projection-based reduced order models in the long-term evolution of forced-dissipative dynamical systems. To simplify our derivation without losing generalizability, ... More
Comparative Evaluation and Analysis of IAX and RSWJan 13 2010Voice over IP (VoIP) is a technology to transport media over IP networks such as the Internet. VoIP has the capability of connecting people over packet switched networks instead of traditional circuit switched networks. Recently, the InterAsterisk Exchange ... More
Design and Development of a Heart Rate Measuring Device using FingertipApr 09 2013In this paper, we presented the design and development of a new integrated device for measuring heart rate using fingertip to improve estimating the heart rate. As heart related diseases are increasing day by day, the need for an accurate and affordable ... More
Gas-phase synthesis of carbon nanotube-graphene heterostructuresApr 17 2019Graphene and carbon nanotubes (CNTs) share the same atomic structure of hexagonal carbon lattice. Yet, their synthesis differs in many aspects, including the shape and size of the catalyst. Here, we demonstrate a floating-catalyst chemical vapor deposition ... More
L-Graphs and Monotone L-GraphsMar 05 2017In an $\mathsf{L}$-embedding of a graph, each vertex is represented by an $\mathsf{L}$-segment, and two segments intersect each other if and only if the corresponding vertices are adjacent in the graph. If the corner of each $\mathsf{L}$-segment in an ... More
Medical diagnosis using neural networkSep 23 2010This research is to search for alternatives to the resolution of complex medical diagnosis where human knowledge should be apprehended in a general fashion. Successful application examples show that human diagnostic capabilities are significantly worse ... More
Spin dynamics and ordering of a cuprate stripe-antiferromagnetJul 04 2000Jul 07 2000In La1.48Nd0.4Sr0.12CuO4 the 139La and 63Cu NQR relaxation rates and signal wipe-out upon lowering temperature are shown to be due to purely magnetic fluctuations. They follow the same renormalized classical behavior as seen in neutron data, when the ... More
Enhanced Position Verification for VANETs using Subjective LogicMar 30 2017Mar 31 2017The integrity of messages in vehicular ad-hoc networks has been extensively studied by the research community, resulting in the IEEE~1609.2 standard, which provides typical integrity guarantees. However, the correctness of message contents is still one ... More
Interference Mitigating Satellite Broadcast Receiver using Reduced Complexity List-Based Detection in Correlated NoiseApr 25 2014The recent commercial trends towards using smaller dish antennas for satellite receivers, and the growing density of broadcasting satellites, necessitate the application of robust adjacent satellite interference (ASI) cancellation schemes. This orbital ... More
Similarity of slow stripe fluctations between Sr-doped cuprates and oxygen-doped nickelatesJun 21 1999Stripe fluctuations in La2NiO4.17 have been studied by 139La NMR using the field and temperature dependence of the linewidth and relaxation rates. In the formation process of the stripes the NMR line intensity is maximal below 230K, starts to diminish ... More
First time determination of the microscopic structure of a stripe phase: Low temperature NMR in La2NiO4.17Dec 04 2001The experimental observations of stripes in superconducting cuprates and insulating nickelates clearly show the modulation in charge and spin density. However, these have proven to be rather insensitive to the harmonic structure and (site or bond) ordering. ... More
Enhanced List-Based Group-Wise Overloaded Receiver with Application to Satellite ReceptionApr 17 2014The market trends towards the use of smaller dish antennas for TV satellite receivers, as well as the growing density of broadcasting satellites in orbit require the application of robust adjacent satellite interference (ASI) cancellation algorithms at ... More
1.5 billion words Arabic CorpusNov 12 2016This study is an attempt to build a contemporary linguistic corpus for Arabic language. The corpus produced, is a text corpus includes more than five million newspaper articles. It contains over a billion and a half words in total, out of which, there ... More
A Proof of the Riemann Hypothesis and Determination of the Relationship Between Non- Trivial Zeros of Zeta Functions and Prime NumbersNov 12 2016This analysis which uses new mathematical methods aims at proving the Riemann hypothesis and figuring out an approximate base for imaginary non-trivial zeros of zeta function at very large numbers, in order to determine the path that those numbers would ... More
A Novel Header Matching Algorithm for Intrusion Detection SystemsAug 05 2011The evolving necessity of the Internet increases the demand on the bandwidth. Therefore, this demand opens the doors for the hackers' community to develop new methods and techniques to gain control over networking systems. Hence, the intrusion detection ... More
Is Private Browsing in Modern Web Browsers Really Private?Jan 05 2018Web browsers are the most common tool to perform various activities over the internet. Along with normal mode, all modern browsers have private browsing mode. The name of the mode varies from browser to browser but the purpose of the private mode remains ... More
Combinatorial geometry of flag domains in G/BOct 01 2017A real form $G_0$ of a complex semisimple Lie group $G$ has only finitely many orbits in any given compact $G$-homogeneous projective algebraic manifold $Z=G/Q$. A maximal compact subgroup $K_0$ of $G_0$ has special orbits $C$ which are complex sub-manifolds ... More
Visualizing Class InformationFeb 25 2016A class is used in object oriented programming to describe each object in the system. It is as a template contains the methods and attributes for each object. The volume of information within the class has a role in the time required for its implementation, ... More
The Statistical Distribution of quantum particles where any of them can be a fermion with probability [P] or a boson with probability [1-p]Mar 29 2012Despite the obvious difference between fermions and bosons in their physical properties and statistical distributions, but we have to ask the following question. What is the form of statistical distribution for a system of quantum particles where any ... More
Electronic structure of alkaline earth and post-transition metal oxidesAug 11 2009Mar 22 2010The electronic structure in alkaline earth AeO (Ae = Be, Mg, Ca, Sr, Ba) and post-transition metal oxides MeO (Me = Zn, Cd, Hg) is probed with oxygen K-edge X-ray absorption and emission spectroscopy. The experimental data is compared with density functional ... More
Autonomous Multirobot Excavation for Lunar ApplicationsJan 06 2017In this paper, a control approach called Artificial Neural Tissue (ANT) is applied to multirobot excavation for lunar base preparation tasks including clearing landing pads and burying of habitat modules. We show for the first time, a team of autonomous ... More
Dy doped BiFeO$_3$ : A Bulk Ceramic with Improved Multiferroic Properties Compared to Nano CounterpartsJun 30 2017The synthesis as well as structural, multiferroic and optical characterization of Dy doped BiFeO$_3$ multiferroic ceramic are presented. Bulk polycrystalline Bi$_{0.9}$Dy$_{0.1}$FeO$_3$ sample is synthesized by solid state reaction, while their nano counterparts ... More
On the Complexity of Multi-Parameterized Cluster EditingNov 30 2015The Cluster Editing problem seeks a transformation of a given undirected graph into a disjoint union of cliques via a minimum number of edge additions or deletions. A multi-parameterized version of the problem is studied, featuring a number of input parameters ... More
An Approximation Algorithm for the Euclidean Bottleneck Steiner Tree ProblemDec 07 2010Given two sets of points in the plane, $P$ of $n$ terminals and $S$ of $m$ Steiner points, a Steiner tree of $P$ is a tree spanning all points of $P$ and some (or none or all) points of $S$. A Steiner tree with length of longest edge minimized is called ... More
Mass composition of ultra-high-energy cosmic rays with the Telescope Array Surface Detector DataAug 10 2018Jan 24 2019The results on ultra-high-energy cosmic rays (UHECR) mass composition obtained with the Telescope Array surface detector are presented. The analysis employs the boosted decision tree (BDT) multivariate analysis built upon 14 observables related to both ... More
Evidence for Declination Dependence of Ultrahigh Energy Cosmic Ray Spectrum in the Northern HemisphereJan 24 2018The energy of the ultrahigh energy spectral cutoff was measured, integrating over the northern hemisphere sky, by the Telescope Array (TA) collaboration, to be $10^{19.78 \pm 0.06}$ eV, in agreement with the High Resolution Fly's Eye (HiRes) experiment, ... More
Depth of Ultra High Energy Cosmic Ray Induced Air Shower Maxima Measured by the Telescope Array Black Rock and Long Ridge FADC Fluorescence Detectors and Surface Array in Hybrid ModeJan 29 2018May 10 2018The Telescope Array observatory utilizes fluorescence detectors and surface detectors to observe air showers produced by ultra high energy cosmic rays in the Earth's atmosphere. Cosmic ray events observed in this way are termed hybrid data. The depth ... More
NMR evidence for two-step phase-separation in Nd_{1.85}Ce_{0.15}CuO_{4-delta}May 19 2004By Cu NMR we studied the spin and charge structure in Nd_{2-x}Ce_{x}CuO_{4-delta}. For x=0.15, starting from a superconducting sample, the low temperature magnetic order in the sample reoxygenated under 1 bar oxygen at 900^0 C, reveals a peculiar modulation ... More
Search for Ultra-High-Energy Neutrinos with the Telescope Array Surface DetectorMay 09 2019We present an upper limit on the flux of ultra-high-energy down-going neutrinos for $E > 10^{18}\ \mbox{eV}$ derived with the nine years of data collected by the Telescope Array surface detector (05-11-2008 -- 05-10-2017). The method is based on the multivariate ... More
Search for point sources of ultra-high energy photons with the Telescope Array surface detectorMar 30 2019Apr 15 2019The surface detector (SD) of the Telescope Array (TA) experiment allows one to indirectly detect photons with energies of order $10^{18}$ eV and higher and to separate photons from the cosmic-ray background. In this paper we present the results of a blind ... More
Testing a reported correlation between arrival directions of ultrahigh-energy cosmic rays and a flux pattern from nearby starburst galaxies using Telescope Array dataSep 05 2018Oct 22 2018The Pierre Auger Collaboration (Auger) recently reported a correlation between the arrival directions of cosmic rays with energies above 39 EeV and the flux pattern of 23 nearby starburst galaxies (SBGs). In this Letter, we tested the same hypothesis ... More
Study of muons from ultra-high energy cosmic ray air showers measured with the Telescope Array experimentApr 11 2018One of the uncertainties in interpretation of ultra-high energy cosmic ray (UHECR) data comes from the hadronic interaction models used for air shower Monte Carlo (MC) simulations. The number of muons observed at the ground from UHECR-induced air showers ... More
Evidence of Intermediate-Scale Energy Spectrum Anisotropy of Cosmic Rays E$\geq$10$^{19.2}$ eV with the Telescope Array Surface DetectorFeb 14 2018Feb 18 2018An intermediate-scale energy spectrum anisotropy has been found in the arrival directions of ultra-high energy cosmic rays of energies above $10^{19.2}$ eV in the northern hemisphere, using 7 years of data from the Telescope Array surface detector. A ... More
Search for Anisotropy in the Ultra High Energy Cosmic Ray Spectrum using the Telescope Array Surface DetectorJul 17 2017Aug 11 2017The Telescope Array (TA) experiment is located in the western desert of Utah, USA, and observes ultra high energy cosmic rays (UHECRs) in the Northern hemisphere. At the highest energies, $E>10$~EeV, the shape of cosmic ray energy spectrum may carry an ... More
First Upper Limits on the Radar Cross Section of Cosmic-Ray Induced Extensive Air ShowersMar 16 2016TARA (Telescope Array Radar) is a cosmic ray radar detection experiment colocated with Telescope Array, the conventional surface scintillation detector (SD) and fluorescence telescope detector (FD) near Delta, Utah, U.S.A. The TARA detector combines a ... More
Search for EeV Protons of Galactic OriginAug 22 2016Oct 27 2016Cosmic rays in the energy range $10^{18.0}$ - $10^{18.5}$ eV are thought to have a light, probably protonic, composition. To study their origin one can search for anisotropy in their arrival directions. Extragalactic cosmic rays should be isotropic, but ... More
Study of Ultra-High Energy Cosmic Ray Composition Using Telescope Array's Middle Drum Detector and Surface Array in Hybrid ModeAug 07 2014Nov 05 2014Previous measurements of the composition of Ultra-High Energy Cosmic Rays(UHECRs) made by the High Resolution Fly's Eye(HiRes) and Pierre Auger Observatory(PAO) are seemingly contradictory, but utilize different detection methods, as HiRes was a stereo ... More
Measurement of the Proton-Air Cross Section with Telescope Array's Middle Drum Detector and Surface Array in Hybrid ModeMay 07 2015Aug 31 2015In this work we are reporting on the measurement of the proton-air inelastic cross section $\sigma^{\rm inel}_{\rm p-air}$ using the Telescope Array (TA) detector. Based on the measurement of the $\sigma^{\rm inel}_{\rm p-air}$ the proton-proton cross ... More
The surface detector array of the Telescope Array experimentJan 24 2012May 25 2012The Telescope Array (TA) experiment, located in the western desert of Utah,USA, is designed for observation of extensive air showers from extremely high energy cosmic rays. The experiment has a surface detector array surrounded by three fluorescence detectors ... More
The Cosmic Ray Energy Spectrum Observed with the Surface Detector of the Telescope Array ExperimentMay 22 2012Mar 26 2013The Telescope Array (TA) collaboration has measured the energy spectrum of ultra-high energy cosmic rays with primary energies above 1.6 x 10^(18) eV. This measurement is based upon four years of observation by the surface detector component of TA. The ... More
The Energy Spectrum of Telescope Array's Middle Drum Detector and the Direct Comparison to the High Resolution Fly's Eye ExperimentFeb 23 2012The Telescope Array's Middle Drum fluorescence detector was instrumented with telescopes refurbished from the High Resolution Fly's Eye's HiRes-1 site. The data observed by Middle Drum in monocular mode was analyzed via the HiRes-1 profile-constrained ... More