Results for "S. Salim"

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Non-linear electrodynamics and the acceleration of the universeDec 03 2003Apr 08 2004It is shown that the addition of a non-linear term to the Lagrangian of the electromagnetic field yields a fluid with an asymptotically super-negative equation of state, causing an accelerated expansion of the universe. Some general properties of nonlinear ... More
Rational curves on elliptic K3 surfacesMay 21 2018Dec 18 2018We prove that any non-isotrivial elliptic K3 surface over an algebraically closed field of arbitrary characteristic contains infinitely many rational curves. This result was previously known in characteristic zero due to the work of Bogomolov and Tschinkel. ... More
A New Generation of Cool White Dwarf Atmosphere Models. III. WD J2356$-$209: Accretion of a Planetesimal with an Unusual CompositionFeb 08 2019WD J2356$-$209 is a cool metal-polluted white dwarf whose visible spectrum is dominated by a strong and broad sodium feature. Although discovered nearly two decades ago, no detailed and realistic analysis of this star had yet been realized. In the absence ... More
Cosmological Effects of Nonlinear ElectrodynamicsOct 10 2006It will be shown that a given realization of nonlinear electrodynamics, used as source of Einstein's equations, generates a cosmological model with interesting features, namely a phase of current cosmic acceleration, and the absence of an initial singularity, ... More
On the string Lie algebraJul 25 2014We construct an abelian representative for the crossed module associated to the string Lie algebra. We show how to apply this construction in order to define quasi-invariant tensors which serve to categorify the infinitesimal braiding on the category ... More
A Candidate Group with Infeasible InversionSep 28 2018Motivated by the potential cryptographic application of building a directed transitive signature scheme, the search for a group with infeasible inversion was initiated in the theses of Hohenberger and Molnar in 2003. Later it was also shown to provide ... More
The stability of a bouncing universeMay 29 2003Dec 05 2003We investigate the stability of a spatially homogeneous and isotropic non-singular cosmological model. We show that the complete set of independent perturbations (the electric part of the perturbed Weyl tensor and the perturbed shear) are regular and ... More
Combinatorial Identities Involving the Mobius FunctionSep 16 2009Oct 20 2009In this paper we derive some identities and inequalities on the M\"obius mu function. Our main tool is phi functions for intervals of positive integers and their unions.
A Dual Narrowband Survey for Hα Emitters at z=2.2: Demonstration of the Technique and Constraints on the Hα Luminosity FunctionApr 30 2012We present first results from a narrowband imaging program for intermediate redshift emission-line galaxies using the newly commissioned FourStar infrared camera at the 6.5m Magellan telescope. To enable prompt identification of H\alpha\ emitters, a pair ... More
Index Coding and Network Coding via Rank MinimizationApr 26 2015Index codes reduce the number of bits broadcast by a wireless transmitter to a number of receivers with different demands and with side information. It is known that the problem of finding optimal linear index codes is NP-hard. We investigate the performance ... More
Securing Data against Limited-Knowledge Adversaries in Distributed Storage SystemsApr 22 2015We study the problem of constructing secure regenerating codes that protect data integrity in distributed storage systems (DSS) in which some nodes may be compromised by a malicious adversary. The adversary can corrupt the data stored on and transmitted ... More
Private Information Retrieval from MDS Coded Data in Distributed Storage SystemsFeb 03 2016Oct 22 2016We consider the problem of providing privacy, in the private information retrieval (PIR) sense, to users requesting data from a distributed storage system (DSS). The DSS uses a Maximum Distance Separable (MDS) code to store the data reliably on unreliable ... More
Staircase Codes for Secret Sharing with Optimal Communication and Read OverheadsDec 09 2015Nov 04 2016We study the communication efficient secret sharing (CESS) problem introduced by Huang, Langberg, Kliewer and Bruck. A classical threshold secret sharing scheme randomly encodes a secret into $n$ shares given to $n$ parties, such that any set of at least ... More
The Identification of BHB Stars Using GALEX and other photometryMay 07 2007Halo samples that have no kinematic bias have been successfully isolated by photometric observations. We show that the near-UV (NUV) magnitude of the GALEX All-Sky Survey can be used, together with Johnson BV magnitudes in a (NUV-V)_0 vs. (B-V)_0 plot, ... More
Coupling DG-FEM and BEM for time harmonic eddy current problemNov 24 2016We introduce and analyze a discontinuous Galerkin FEM/BEM method for a time-harmonic eddy current problem written in terms of the magnetic field. We use nonconforming N\'ed\'elec finite elements on a partition of the interior domain coupled with continuous ... More
A Model of the Commit Size Distribution of Open SourceAug 21 2014A fundamental unit of work in programming is the code contribution ("commit") that a developer makes to the code base of the project in work. We use statistical methods to derive a model of the probabilistic distribution of commit sizes in open source ... More
Nonlinear electrodynamics and the gravitational redshift of highly magnetised neutron starsMar 02 2004Sep 07 2004The idea that the nonlinear electromagnetic interaction, i. e., light propagation in vacuum, can be geometrized was developed by Novello et al. (2000) and Novello & Salim (2001). Since then a number of physical consequences for the dynamics of a variety ... More
Spintronic Properties of Zigzag-Edged Triangular Graphene FlakesOct 04 2010We investigate quantum transport properties of triangular graphene flakes with zigzag edges by using first principles calculations. Triangular graphene flakes have large magnetic moments which vary with the number of hydrogen atoms terminating its edge ... More
Addressing Security Challenges in Cloud ComputingJul 31 2013Cloud computing is a new computing paradigm which allows sharing of resources on remote server such as hardware, network, storage using internet and provides the way through which application, computing power, computing infrastructure can be delivered ... More
Minimizing Latency for Secure Coded Computing Using Secret Sharing via Staircase CodesFeb 07 2018We consider the setting of a Master server, M, who possesses confidential data (e.g., personal, genomic or medical data) and wants to run intensive computations on it, as part of a machine learning algorithm for example. The Master wants to distribute ... More
New Codes and Inner Bounds for Exact Repair in Distributed Storage SystemsFeb 11 2014We study the exact-repair tradeoff between storage and repair bandwidth in distributed storage systems (DSS). We give new inner bounds for the tradeoff region and provide code constructions that achieve these bounds.
Secure Network Coding for Wiretap Networks of Type IIJul 20 2009We consider the problem of securing a multicast network against a wiretapper that can intercept the packets on a limited number of arbitrary network edges of its choice. We assume that the network employs the network coding technique to simultaneously ... More
Production of photons in a bouncing universeOct 18 2004Using a new non-singular solution,it is shown that the production of photons in dilaton electrodynamics in a cosmological setting is increased if the effect of matter creation on the geometry is taken into account. This increment may be related to the ... More
Singularities in General Relativity coupled to nonlinear electrodynamicsMar 13 2000Apr 21 2000We study here some consequences of the nonlinearities of the electromagnetic field acting as a source of Einstein's equations on the propagation of photons. We restrict to the particular case of a ``regular black hole'', and show that there exist singularities ... More
Cyclotomic quiver Hecke algebras and Hecke algebra of G(r,p,n)Sep 28 2016Given a quiver automorphism with nice properties, we give a presentation of the fixed subalgebra of the associated cyclotomic quiver Hecke algebra. Generalising an isomorphism of Brundan and Kleshchev between the cyclotomic Hecke algebra of type G(r,1,n) ... More
Dynamics of Phononic Dissipation at the Atomic Scale: Dependence on Internal Degrees of FreedomMar 01 2007Dynamics of dissipation of a local phonon distribution to the substrate is a key issue in friction between sliding surfaces as well as in boundary lubrication. We consider a model system consisting of an excited nano-particle which is weakly coupled with ... More
Cyclotomic Yokonuma-Hecke algebras are cyclotomic quiver Hecke algebrasMar 12 2016Jun 24 2016We prove that cyclotomic Yokonuma--Hecke algebras of type A are cyclotomic quiver Hecke algebras and we give an explicit isomorphism with its inverse, using a similar result of Brundan and Kleshchev on cyclotomic Hecke algebras. The quiver we use is given ... More
Magnetic fields and the Weyl tensor in the early universeFeb 13 2014Sep 10 2014We have solved the Einstein-Maxwell equations for a class of isotropic metrics with constant spatial curvature in the presence of magnetic fields. We consider a slight modification of the Tolman averaging relations so that the energy-momentum tensor of ... More
Plagiarism Detection Using Graph-Based RepresentationApr 26 2010Plagiarism of material from the Internet is a widespread and growing problem. Several methods used to detect the plagiarism and similarity between the source document and suspected documents such as fingerprint based on character or n-gram. In this paper, ... More
Weingarten map of the hypersurface in 4-dimensional Euclidean space and its applicationsJan 21 2019In this paper, by taking into account the beginning of the hypersurface theory in Euclidean space $E^4$, a practical method for the matrix of the Weingarten map (or the shape operator) of an oriented hypersurface $M^3$ in $E^4$ is obtained. By taking ... More
A Multi Perspective Approach for Understanding the Determinants of Cloud Computing Adoption among Australian SMEsMay 28 2016Cloud computing is proved to be an effective computing technology for organisations through the advantages that it offers such as cost-effectiveness, IT technical agility and scalability, enhancing businesses processes, and increasing enterprises competitiveness. ... More
Cosmological redshift and nonlinear electrodynamics propagation of photons from distant sourcesOct 26 2007By-now photons are the unique universal messengers. Cosmological sources like far-away galaxies or quasars are well-known light-emitters. Here we demonstrate that the nonlinear electrodynamics (NLED) description of photon propagation through the weak ... More
Rack-Bialgebras and Star-Products on duals of Leibniz algebrasDec 18 2014In this paper we focus on a certain self-distributive multiplication on coalgebras, which leads to so-called rack bialgebra. Inspired by semi-group theory (adapting the Suschkewitsch theorem), we do some structure theory for rack bialgebras and cocommutative ... More
Green Valley GalaxiesJan 08 2015The "green valley" is a wide region separating the blue and the red peaks in the ultraviolet-optical color magnitude diagram, first revealed using GALEX UV photometry. The term was coined by Christopher Martin in 2005. Green valley highlights the discriminating ... More
Synchronizing Edits in Distributed Storage NetworksSep 04 2014We consider the problem of synchronizing data in distributed storage networks under an edit model that includes deletions and insertions. We present two modifications of MDS, regenerating and locally repairable codes that allow updates in the parity-check ... More
Images de représentations galoisiennes associées à certaines formes modulaires de Siegel de genre $2$Feb 06 2016May 12 2016We study the image of the $\ell$-adic Galois representations associated to the four vector valued Siegel modular forms appearing in the work of Chenevier and Lannes. These representations are symplectic of dimension $4$. Following a method of Dieulefait, ... More
Mixed discontinuous Galerkin approximation of the elasticity eigenproblemJan 26 2018We introduce a discontinuous Galerkin method for the mixed formulation of the elasticity eigenproblem with reduced symmetry. The analysis of the resulting discrete eigenproblem does not fit in the standard spectral approximation framework since the underlying ... More
Full Three Dimensional Orbits For Multiple Stars on Close Approaches to the Central Supermassive Black HoleMar 07 2003With the advent of adaptive optics on the W. M. Keck 10 m telescope, two significant steps forward have been taken in building the case for a supermassive black hole at the center of the Milky Way and understanding the black hole's effect on its environment. ... More
Minimal Closed Set of Observables in the Theory of Cosmological PerturbationsMar 07 1994Mar 11 1994The theory of perturbation of Friedman-Robertson-Walker (FRW) cosmology is analysed exclusively in terms of observable quantities. Although this can be a very complete and general procedure we limit our presentation here to the case of irrotational perturbations ... More
The Slow Death (or Rebirth?) of Extended Star Formation in z~0.1 Green Valley Early-Type GalaxiesOct 22 2012Oct 24 2012UV observations in the local universe have uncovered a population of early-type galaxies with UV flux consistent with low-level recent or ongoing star formation. We present resolved UV-optical photometry of a sample of 19 SDSS early-type galaxies at z~0.1 ... More
UV Star Formation Rates in the Local UniverseApr 26 2007May 07 2007We measure star formation rates of ~50,000 optically-selected galaxies in the local universe (z~0.1), spanning a range from gas-rich dwarfs to massive ellipticals. We obtain dust-corrected SFRs by fitting the GALEX (UV) and SDSS (optical) photometry to ... More
Analog black holes in flowing dielectricsJan 18 2002Jan 21 2003We show that a flowing dielectric medium with a linear response to an external electric field can be used to generate an analog geometry that has many of the formal properties of a Schwarzschild black hole for light rays, in spite of birefringence. We ... More
Creation of cosmological magnetic fields in a bouncing cosmologyDec 11 2006We show (in a completely analytical and exact manner) that an efficient magnetic field amplification method is operative during the bounce in a time-dependent gauge coupling model. The cosmological magnetic fields so generated have particular spectral ... More
Low Voltage Totally Free Flexible RF MEMS Switch With Anti-Stiction SystemMay 07 2008This paper concerns a new design of RF MEMS switch combined with an innovative process which enable low actuation voltage (<5V) and avoid stiction. First, the structure described with principal design issues, the corresponding anti-stiction system is ... More
No nearby counterparts to the moving objects in the Hubble Deep FieldDec 14 1999Ibata et al (1999) have recently discovered faint, moving objects in the Hubble Deep Field. The quantity, magnitudes and proper motions of these objects are consistent with old white dwarfs making up the Galactic dark halo. We review a number of ground-based ... More
Galaxy-scale Star Formation on the Red Sequence: the Continued Growth of S0s and the Quiescence of EllipticalsJun 25 2012This paper examines star formation (SF) in relatively massive, primarily early-type galaxies (ETGs) at z~0.1. A sample is drawn from bulge-dominated GALEX/SDSS galaxies on the optical red sequence with strong UV excess and yet quiescent SDSS spectra. ... More
Widespread and Hidden Active Galactic Nuclei in Star-Forming Galaxies at Redshift > 0.3Nov 27 2012Jan 20 2013We characterize the incidence of active galactic nuclei (AGNs) is 0.3 < z < 1 star-forming galaxies by applying multi-wavelength AGN diagnostics (X-ray, optical, mid-infrared, radio) to a sample of galaxies selected at 70-micron from the Far-Infrared ... More
A nongravitational wormholeMar 17 2000Jun 14 2000Using the effective metric formalism for photons in a nonlinear electromagnetic theory, we show that a certain field configuration in Born-Infeld electromagnetism in flat spacetime can be interpreted as an ultrastatic spherically symmetric wormhole. We ... More
Mid-IR Luminosities and UV/Optical Star Formation Rates at z<1.4May 02 2009May 15 2009UV continuum and mid-IR emission constitute two widely used star formation indicators at intermediate and high redshifts. We study 2430 galaxies with z<1.4 in the Extended Groth Strip with MIPS 24 mic observations from FIDEL, spectroscopy from DEEP2, ... More
A new test procedure of independence in copula models via chi-square-divergenceMar 11 2008Jun 20 2011We introduce a new test procedure of independence in the framework of parametric copulas with unknown marginals. The method is based essentially on the dual representation of $\chi^2$-divergence on signed finite measures. The asymptotic properties of ... More
On the effects of the vanishing of the non-metricity to the effective string field equationsJul 01 2002Effective string field equations with zero-constrained torsion have been studied extensively in the literature. But, one may think that the effects of vanishing of the non-metricity have not been explained in detail and also in according to some recent ... More
On the strong approximation of non-overlapping m-spacings processesJul 24 2008In this paper we establish strong approximations of the uniform non-overlapping m-spacings process extending the preceding results. Our methods rely on the Mason and Van Zwet's invariance principle.
Hardware Acceleration of the Gipps Model for Real-Time Traffic SimulationApr 11 2013Traffic simulation software is becoming increasingly popular as more cities worldwide use it to better manage their crowded traffic networks. An important requirement for such software is the ability to produce accurate results in real time, requiring ... More
The Unitarity Triangle through $B_d\to ρ^{\pm} π^{\mp}$ decaysDec 01 2005We analyze the impact of the CP-violating observables in the $B_d\to \rho^{\pm} \pi^{\mp}$ system, combined with the precise measurement of $\sin2\beta$, in the extraction of the CKM matrix. We explore two strategies for determining the Unitarity Triangle ... More
Nearby Microlensing Events - Identification of the Candidates for the SIMSep 28 1999Apr 03 2000The Space Interferometry Mission (SIM) is the instrument of choice when it comes to observing astrometric microlensing events where nearby, usually high-proper-motion stars (``lenses''), pass in front of more distant stars (``sources''). Each such encounter ... More
Empirical Calibration of Hubble Space Telescope WFPC2 F606W and F814W PhotometrySep 30 1998Using the ground-based V and I photometry of a sample of stars from the Groth Strip, we obtain the first empirical calibration of the F606W and F814W Hubble Space Telescope WFPC2 filters for 0.5<V-I<4.5. We present results in the form of corrections that ... More
Average Minimum Transmit Power to achieve SINR Targets: Performance Comparison of Various User Selection AlgorithmsDec 02 2010In multi-user communication from one base station (BS) to multiple users, the problem of minimizing the transmit power to achieve some target guaranteed performance (rates) at users has been well investigated in the literature. Similarly various user ... More
Magnetic properties of exchange biased and of unbiased oxide/permalloy thin layers: a ferromagnetic resonance and Brillouin scattering studyJun 29 2010Microstrip ferromagnetic resonance and Brillouin scattering are used to provide a comparative determination of the magnetic parameters of thin permalloy layers interfaced with a non-magnetic (Al2O3) or with an antiferromagnetic oxide (NiO). It is shown ... More
On the unit group of a commutative group ringMay 14 2013We investigate the group of normalized units of the group algebra $\mathbb{Z}_{p^e}G$ of a finite abelian $p$-group $G$ over the ring $\mathbb{Z}_{p^e}$ of residues modulo $p^e$ with $e\geq 1$.
Special Smarandache Curves According To Darboux Frame In E3Mar 20 2012In this study, we determine some special Smarandache curves according to Darboux frame in E3. We give some characterizations and consequences of Smarandache curves.
Uniform-in-bandwidth consistency for kernel-type estimators of Shannon's entropyJul 14 2008Jun 21 2011We establish uniform-in-bandwidth consistency for kernel-type estimators of the differential entropy. We consider two kernel-type estimators of Shannon's entropy. As a consequence, an asymptotic 100% confidence interval of entropy is provided.
CKM matrix from non-leptonic B-decaysOct 11 2004We analyze the impact of the forthcoming CP-violating observables in the $B_s\to K^+ K^-$ system, combined with the precise measurement of $\sin2\beta$ , in the extraction of the CKM matrix. Computing the penguin parameters $(r, \theta)$ within QCD factorization ... More
Non-leptonic B-decays, CP violation & the UTSep 03 2004We study the implication of the time-dependent CP asymmetry in $B\to\pi^+\pi^-$ decays on the extraction of weak phases taking into account the precise measurement of $\sin 2\beta$, obtained from the ``gold-plated''mode $B\to J/\psi K_S$. Predictions ... More
Dyson Spheres around White DwarfsMar 15 2015A Dyson Sphere is a hypothetical structure that an advanced civilization might build around a star to intercept all of the star's light for its energy needs. One usually thinks of it as a spherical shell about one astronomical unit (AU) in radius, and ... More
Graphene Nanomeshes: Existence of Defect-Induced Dirac Fermions on Graphene Host MatrixJun 21 2011Motivated by the state of the art method for fabricating high density periodic nanoscale defects in graphene, the structural, mechanical and electronic properties of defect-patterned graphene nanomeshes including diverse morphologies of adatoms and holes ... More
Stellar Orbits Around the Galactic Center Black HoleJun 05 2003Nov 02 2004We present new proper motion measurements and simultaneous orbital solutions for three newly identified (S0-16, S0-19, and S0-20) and four previously known (S0-1, S0-2, S0-4, and S0-5) stars at the Galactic Center. This analysis pinpoints the Galaxy's ... More
Einstein's gravitational lensing and nonlinear electrodynamicsAug 09 2004May 18 2005In 1936 Einstein predicted the phenomenon presently known as gravitational lensing (GL). A prime feature of GL is the magnification, because of the gravitational field, of the star visible surface as seen from a distant observer. We show here that nonlinear ... More
An Iterative Algorithm to Build Chinese Language ModelsJun 17 1996We present an iterative procedure to build a Chinese language model (LM). We segment Chinese text into words based on a word-based Chinese language model. However, the construction of a Chinese LM itself requires word boundaries. To get out of the chicken-and-egg ... More
$B \to K^* \ell^+ \ell^-\big (ρ\ell ν_{\ell}\big)$ helicity analysis in the LEETSep 17 2002We calculate the independent helicity amplitudes in the decays $B \to K^* \ell^+ \ell^-$ and $B \to \rho \ell \nu_\ell$ in the so-called Large-Energy-Effective-Theory (LEET). Taking into account the dominant $O(\alpha_s)$ and SU(3) symmetry-breaking effects, ... More
Beyond Endoscopy via the trace formula - III: The standard representationDec 31 2015We finalize the analysis of the trace formula initiated in \cite{Altug:2015aa} and developed in \cite{Altug:2015ab}, and calculate the asymptotic expansion of the beyond endoscopic averages for the standard $L$-functions attached to weight $k\geq3$ cusp ... More
A Strong Invariance Theorem of the Tail Empirical Copula ProcessesOct 15 2011We study the behavior of bivariate empirical copula process $\mathbb{G}_n(\cdot,\cdot)$ on pavements $[0,k_n/n]^2$ of $[0,1]^2,$ where $k_n$ is a sequence of positive constants fulfilling some conditions. We provide a upper bound for the strong approximation ... More
Revised NLTTJul 17 2002Revised NLTT (New Luyten Catalogue of Stars With Proper Motions Larger than Two Tenths of an Arcsecond) contains improved astrometry and new optical/infrared photometry for the vast majority of NLTT stars lying in the overlap of regions covered by POSS ... More
Searching for Failed Supernovae With Astrometric BinariesNov 27 2001Stars in the mass range 8 Msun<M<30 Msun are thought to end their lives as luminous supernovae that leave behind a neutron star. However, if a substantial fraction of these stars instead ended as black-hole remnants, without producing a supernova (a `failed' ... More
Sgr A* ``Visual Binaries'': A Direct Measurement of the Galactocentric DistanceDec 16 1998Dec 16 1998We present a new geometrical method for measuring the distance to the Galactic center (R_0) by solving for the Keplerian orbit of individual stars bound to the black hole associated with the Sgr A* from radial velocity and proper motion measurements. ... More
Static charging of graphene and graphite slabsSep 29 2010Mar 19 2011The effect of external static charging of graphene and its flakes are investigated by using first-principles calculations. While the Fermi level of negatively charged graphene rises and then is quickly pinned by the parabolic, nearly free electron like ... More
The Galex Ultraviolet Variability (GUVV) CatalogApr 21 2005We present Version 1.0 of the NASA Galaxy Evolution Explorer (GALEX) ultraviolet variability catalog (GUVV) that contains information on 84 time-variable and transient sources gained with simultaneous near and far ultraviolet photometric observations. ... More
Special involute-evolute partner D-curves in E3Apr 26 2012Jun 28 2012In this paper, we take into account the opinion of involute-evolute curves which lie on fully surfaces and by taking into account the Darboux frames of them we illustrate these curves as special involute-evolute partner D-curves in E3. Besides, we find ... More
The two-loop effective action and some symmetries of the Riemann tensor and the Kalb-Ramond H fieldJan 29 2003Feb 03 2003Withdrawn by arXiv administration because the text and equations were plagiarized almost entirely verbatim from hep-th/9610131 .
Exploring the Unitarity Triangle through CP violation observables in $B_s \to K^+ K^-$Jul 01 2004Jul 14 2004We discuss the determination of the CKM parameters from the forthcoming $CP$ violation observables in $B_s \to K^+ K^-$ decays. Combining the information on mixing induced CP violation in $B_s \to K^+ K^-$, with the $B_d \to J/\psi K_s$ precision observable ... More
CP Violation in B Decays within QCD FactorizationNov 08 2003We analyze the extraction of weak phases from CP violation in $B\to\pi^+\pi^-$ decays. By combining the information on mixing induced CP violation in $B\to\pi^+\pi^-$, namely $S_{\pi\pi}$, with the precision observable $\sin 2\beta$ obtained from the ... More
Theoretical studies of exclusive rare B decays in the Standard Model and Supersymmetric theoriesNov 07 2002We calculate the independent helicity amplitudes in the decays $B \to K^* \ell^+ \ell^-$ and $B \to \rho \ell \nu_\ell$ in the so-called Large-Energy-Effective-Theory (LEET). Taking into account the dominant $O(\alpha_s)$ and SU(3) symmetry-breaking effects, ... More
Standing Slow MHD Waves in Radiatively Cooling Coronal LoopsJan 12 2015The standing slow magneto-acoustic oscillations in cooling coronal loops are investigated. There are two damping mechanisms which are considered to generate the standing acoustic modes in coronal magnetic loops namely thermal conduction and radiation. ... More
Z Condensation and Standard Model BaryogenesisJun 09 1994Jun 10 1994The standard model satisfies Sakharov's conditions for baryogenesis but the CP violation in the KM matrix appears too small to account for the observed asymmetry. In this letter we explore a mechanism through which CP violation can be greatly amplified. ... More
Beyond Endoscopy via the trace formula - II: Asymptotic expansions of Fourier transforms and bounds towards the Ramanujan conjectureJun 30 2015Dec 31 2015We continue the analysis of the elliptic part of the trace formula initiated in \cite{Altug:2015aa}. In that reference Poisson summation was applied to the elliptic part and the dominant term was analyzed. The main aim of this paper is to study the remaining ... More
Stellar Mass Function From SIM Astrometry/PhotometryJul 07 1999By combining SIM observations with ground-based photometry, one can completely solve microlensing events seen toward the Galactic bulge. One could measure the mass, distance, and transverse velocity of ~100 lenses to ~5% precision in only ~500 hours of ... More
Improved Astrometry and Photometry for the Luyten Catalog. I. Bright StarsApr 15 2002We outline the construction of an updated version of the New Luyten Two-Tenths (NLTT) catalog of high proper motion stars, which will contain improved astrometry and photometry for the vast majority of the ~59,000 stars in NLTT. The bright end is constructed ... More
Photometric Microlens Parallaxes with SIMFeb 08 1999Astrometric measurements of microlensing events can in principle determine both the "parallax" \tilde r_E and the "proper motion" \mu of an individual event which (combined with the Einstein time scale t_E) in turn yield the mass, distance, and transverse ... More
Data Exchange Problem with HelpersFeb 08 2012In this paper we construct a deterministic polynomial time algorithm for the problem where a set of users is interested in gaining access to a common file, but where each has only partial knowledge of the file. We further assume the existence of another ... More
Optimal Deterministic Polynomial-Time Data Exchange for OmniscienceAug 30 2011We study the problem of constructing a deterministic polynomial time algorithm that achieves omniscience, in a rate-optimal manner, among a set of users that are interested in a common file but each has only partial knowledge about it as side-information. ... More
Discontinuous Galerkin hp-BEM with quasi-uniform meshesJun 27 2012We present and analyze a discontinuous variant of the hp-version of the boundary element Galerkin method with quasi-uniform meshes. The model problem is that of the hypersingular integral operator on an (open or closed) polyhedral surface. We prove a ... More
A review of Plesiochronous Digital Hierarchy (PDH) and Synchronous Digital Hierarchy (SDH)Jul 23 2014With the advancement in telecommunications, packet traffic is rapidly becoming the mainstream of data traffic. The use and deployment of Synchronous Digital Hierarchy (SDH) networks for interconnection has gained traction worldwide due to its flexibility ... More
Improving Term Extraction Using Particle Swarm Optimization TechniquesFeb 22 2010Term extraction is one of the layers in the ontology development process which has the task to extract all the terms contained in the input document automatically. The purpose of this process is to generate list of terms that are relevant to the domain ... More
General bootstrap for dual phi-divergence estimatesJun 11 2011Oct 15 2011A general notion of bootstrapped $\phi$-divergence estimates constructed by exchangeably weighting sample is introduced. Asymptotic properties of these generalized bootstrapped $\phi$-divergence estimates are obtained, by mean of the empirical process ... More
On the Gaussian approximation of vector-valued multiple integralsSep 07 2010By combining the findings of two recent, seminal papers by Nualart, Peccati and Tudor, we get that the convergence in law of any sequence of vector-valued multiple integrals $F_n$ towards a centered Gaussian random vector $N$, with given covariance matrix ... More
New estimates and tests of independence in some copula modelsJun 30 2008Jun 21 2011We introduce new estimates and tests of independence in copula models with unknown margins using $\phi$-divergences and the duality technique. The asymptotic laws of the estimates and the test statistics are established both when the parameter is an interior ... More
Confinement of electrons in size modulated silicon nanowiresJul 21 2009Based on first-principles calculations we showed that superlattices of periodically repeated junctions of hydrogen saturated silicon nanowire segments having different lengths and diameters form multiple quantum well structures. The band gap of the superlattice ... More
Beyond Endoscopy via the Trace Formula-I: Poisson Summation and Contributions of Special RepresentationsJun 07 2015With analytic applications in mind, in particular Beyond Endoscopy ([13]), we initiate the study of the elliptic part of the trace formula. Incorporating the approximate functional equation to the elliptic part we control the analytic behavior of the ... More
Strong Approximation of Empirical Copula Processes by Gaussian ProcessesNov 20 2008Jun 19 2011We provide the strong approximation of empirical copula processes by a Gaussian process. In addition we establish a strong approximation of the smoothed empirical copula processes and a law of iterated logarithm.
Elastic and plastic deformation of graphene, silicene, and boron nitride honeycomb nanoribbons under uniaxial tension: A first-principles density-functional theory studyJul 02 2009Jan 25 2010This study of elastic and plastic deformation of graphene, silicene, and boron nitride (BN) honeycomb nanoribbons under uniaxial tension determines their elastic constants and reveals interesting features. In the course of stretching in the elastic range, ... More
Suppression of Star Formation in the Hosts of Low-Excitation Radio GalaxiesNov 25 2015The feedback from radio-loud active galactic nuclei (R-AGN) may help maintain low star formation (SF) rates in their early-type hosts, but the observational evidence for this mechanism has been inconclusive. We study systematic differences of aggregate ... More