Results for "Yaser P. Fallah"

total 122104took 0.17s
MNIST Dataset Classification Utilizing k-NN Classifier with Modified Sliding-window MetricSep 18 2018Nov 16 2018The MNIST dataset of the handwritten digits is known as one of the commonly used datasets for machine learning and computer vision research. We aim to study a widely applicable classification problem and apply a simple yet efficient K-nearest neighbor ... More
Fairness and Stability Analysis of Congestion Control Schemes in Vehicular Ad-hoc NetworksJun 01 2012Cooperative vehicle safety (CVS) systems operate based on broadcast of vehicle position and safety information to neighboring cars. The communication medium of CVS is a vehicular ad-hoc network. One of the main challenges in large scale deployment of ... More
A Driver Behavior Modeling Structure Based on Non-parametric Bayesian Stochastic Hybrid ArchitectureJul 11 2018Heterogeneous nature of the vehicular networks, which results from the co-existence of human-driven, semi-automated, and fully autonomous vehicles, is a challenging phenomenon toward the realization of the intelligent transportation systems with an acceptable ... More
Controlling Steering Angle for Cooperative Self-driving Vehicles utilizing CNN and LSTM-based Deep NetworksApr 08 2019A fundamental challenge in autonomous vehicles is adjusting the steering angle at different road conditions. Recent state-of-the-art solutions addressing this challenge include deep learning techniques as they provide end-to-end solution to predict steering ... More
Intelligent Wide-band Spectrum ClassifierApr 12 2019We introduce a new technique for narrow-band (NB) signal classification in sparsely populated wide-band (WB) spectrum using supervised learning approach. For WB spectrum acquisition, Nyquist rate sampling is required at the receiver's analog-to-digital ... More
A Stochastic Hybrid Framework for Driver Behavior Modeling Based on Hierarchical Dirichlet ProcessNov 15 2017Jul 11 2018Scalability is one of the major issues for real-world Vehicle-to-Vehicle network realization. To tackle this challenge, a stochastic hybrid modeling framework based on a non-parametric Bayesian inference method, i.e., hierarchical Dirichlet process (HDP), ... More
Analysis of Distributed Congestion Control in Cellular Vehicle-to-everything NetworksMar 29 2019Cellular Vehicle-to-everything (C-V2X) communication has been proposed in the 3rd Generation Partnership Project release 14 standard to address the latency and reliability requirements of cooperative safety applications. Such applications can involve ... More
Controlling Steering Angle for Cooperative Self-driving Vehicles utilizing CNN and LSTM-based Deep NetworksApr 08 2019May 12 2019A fundamental challenge in autonomous vehicles is adjusting the steering angle at different road conditions. Recent state-of-the-art solutions addressing this challenge include deep learning techniques as they provide end-to-end solution to predict steering ... More
Controlling Steering Angle for Cooperative Self-driving Vehicles utilizing CNN and LSTM-based Deep NetworksApr 08 2019Apr 19 2019A fundamental challenge in autonomous vehicles is adjusting the steering angle at different road conditions. Recent state-of-the-art solutions addressing this challenge include deep learning techniques as they provide end-to-end solution to predict steering ... More
Spatio-temporal Dynamics of Cellular V2X Communication in Dense Vehicular NetworksJun 18 2019Cellular Vehicle-to-everything (C-V2X) communication is a major V2X solution proposed by the 3rd Generation Partnership Project (3GPP). Scalability of C-V2X has been questioned and investigated in previous works to study how efficient and reliable this ... More
A Learning-Based Framework for Two-Dimensional Vehicle Maneuver Prediction over V2V NetworksAug 01 2018Situational awareness in vehicular networks could be substantially improved utilizing reliable trajectory prediction methods. More precise situational awareness, in turn, results in notably better performance of critical safety applications, such as Forward ... More
V2X System Architecture Utilizing Hybrid Gaussian Process-based Model StructuresMar 04 2019Scalable communication is of utmost importance for reliable dissemination of time-sensitive information in cooperative vehicular ad-hoc networks (VANETs), which is, in turn, an essential prerequisite for the proper operation of the critical cooperative ... More
Adaptive Content Control for Communication amongst Cooperative Automated VehiclesSep 15 2014Cooperative automated vehicles exchange information to assist each other in creating a more precise and extended view of their surroundings, with the aim of improving automated-driving decisions. This paper addresses the need for scalable communication ... More
Composite α-μ Based DSRC Channel Model Using Large Data Set of RSSI MeasurementsAug 01 2018Channel modeling is essential for design and performance evaluation of numerous protocols in vehicular networks. In this work, we study and provide results for largescale and small-scale modeling of communication channel in dense vehicular networks. We ... More
V2X System Architecture Utilizing Hybrid Gaussian Process-based Model StructuresMar 04 2019Mar 06 2019Scalable communication is of utmost importance for reliable dissemination of time-sensitive information in cooperative vehicular ad-hoc networks (VANETs), which is, in turn, an essential prerequisite for the proper operation of the critical cooperative ... More
A Learning-based Stochastic MPC Design for Cooperative Adaptive Cruise Control to Handle Interfering VehiclesFeb 26 2018Vehicle to Vehicle (V2V) communication has a great potential to improve reaction accuracy of different driver assistance systems in critical driving situations. Cooperative Adaptive Cruise Control (CACC), which is an automated application, provides drivers ... More
Implementation and Evaluation of a Cooperative Vehicle-to-Pedestrian Safety ApplicationAug 01 2018While the development of Vehicle-to-Vehicle (V2V) safety applications based on Dedicated Short-Range Communications (DSRC) has been extensively undergoing standardization for more than a decade, such applications are extremely missing for Vulnerable Road ... More
Real-Time Hardware-In-the-Loop Emulation Framework for DSRC-based Connected Vehicle ApplicationsMay 22 2019Jun 19 2019The rapid growth of connected and automated vehicle (CAV) solutions have made a significant impact on the safety of intelligent transportation systems. However, similar to any other emerging technology, thorough testing and evaluation studies are of paramount ... More
Real-Time Hardware-In-the-Loop Emulation Framework for DSRC-based Connected Vehicle ApplicationsMay 22 2019The rapid growth of connected and automated vehicle (CAV) solutions have made a significant impact on the safety of intelligent transportation systems. However, similar to any other emerging technology, thorough testing and evaluation studies are of paramount ... More
Multiple Access in Cellular V2X: Performance Analysis in Highly Congested Vehicular NetworksSep 07 2018Oct 27 2018Vehicle-to-everything (V2X) communication enables vehicles, roadside vulnerable users, and infrastructure facilities to communicate in an ad-hoc fashion. Cellular V2X (C-V2X), which was introduced in the 3rd generation partnership project (3GPP) release ... More
Electron Electric Dipole Moment from Lepton Flavor ViolationFeb 15 2007Jul 15 2007The general Minimal Supersymmetric Standard Model introduces new sources for Lepton Flavor Violation (LFV) as well as CP-violation. In this paper, we show that when both sources are present, the electric dipole moment of the electron, $d_e$, receives ... More
Reconciling large CP-violating phases with bounds on the electric dipole moments in the MSSMMay 25 2006Jun 09 2006The possibility of cancelation between different contributions to d_e, d_n and d_{Hg} has been reconsidered with special emphasis on the region that is phenomenologically interesting (intermediate values of \tan \beta and sub-TeV sfermion masses). It ... More
Constraining Inert Triplet Dark Matter by the LHC and FermiLATAug 04 2014Oct 15 2014We study collider phenomenology of inert triplet scalar dark matter at the LHC. We discuss possible decay of Higgs boson to dark matter candidate and apply current experimental data for invisible Higgs decay and $R_{\gamma\gamma}$ to constrain parameter ... More
Constraints on Randall-Sundrum model from top-antitop production at the LHCOct 27 2011Dec 07 2011We study the top pair production cross section at the LHC in the context of Randall-Sundrum model including the Kaluza-Klein (KK) excited gravitons. It is shown that the recent measurement of the cross section of this process at the LHC restricts the ... More
Lorentz Symmetry in QFT on Quantum Bianchi I Space-TimeJul 03 2012Oct 25 2012We develop the quantum theory of a scalar field on LQC Bianchi I geometry. In particular, we focus on single modes of the field: the evolution equation is derived from the quantum scalar constraint, and it is shown that the same equation can be obtained ... More
Total Capture: A 3D Deformation Model for Tracking Faces, Hands, and BodiesJan 05 2018We present a unified deformation model for the markerless capture of multiple scales of human movement, including facial expressions, body motion, and hand gestures. An initial model is generated by locally stitching together models of the individual ... More
Shapes and Context: In-the-Wild Image Synthesis & ManipulationJun 11 2019We introduce a data-driven approach for interactively synthesizing in-the-wild images from semantic label maps. Our approach is dramatically different from recent work in this space, in that we make use of no learning. Instead, our approach uses simple ... More
The final state of gravitational collapse in Eddington-inspired Born-Infeld theoryDec 16 2015Feb 14 2017In this paper, we address the implications when a homogeneous dust model is considered for a scenario of gravitational collapse in the context of Eddington-inspired Born-Infeld (EiBI) theory. In order to describe the dynamical evolution of the collapse, ... More
Safety experiments for small robots investigating the potential of soft materials in mitigating the harm to the head due to impactsApr 21 2019There is a growing interest in social robots to be considered in the therapy of children with autism due to their effectiveness in improving the outcomes. However, children on the spectrum exhibit challenging behaviors that need to be considered when ... More
Quantum theory of electromagnetic fields in a cosmological quantum spacetimeSep 14 2017Nov 06 2017The theory of quantum fields propagating on an isotropic cosmological quantum spacetime is reexamined by generalizing the scalar test field to an electromagnetic (EM) vector field. For any given polarization of the EM field on the classical background, ... More
Top Quark Forward-Backward Asymmetry and $W'$-Boson with General CouplingsMay 15 2012Oct 24 2012The measured forward-backward asymmetry in top pair events at the Fermilab Tevatron collider deviates significantly from the standard model expectation. Several models have been proposed to describe the observed asymmetry which grows with the rapidity ... More
Realtime Multi-Person 2D Pose Estimation using Part Affinity FieldsNov 24 2016Apr 14 2017We present an approach to efficiently detect the 2D pose of multiple people in an image. The approach uses a nonparametric representation, which we refer to as Part Affinity Fields (PAFs), to learn to associate body parts with individuals in the image. ... More
Deep Appearance Models for Face RenderingAug 01 2018We introduce a deep appearance model for rendering the human face. Inspired by Active Appearance Models, we develop a data-driven rendering pipeline that learns a joint representation of facial geometry and appearance from a multiview capture setup. Vertex ... More
Hand Keypoint Detection in Single Images using Multiview BootstrappingApr 25 2017We present an approach that uses a multi-camera system to train fine-grained detectors for keypoints that are prone to occlusion, such as the joints of a hand. We call this procedure multiview bootstrapping: first, an initial keypoint detector is used ... More
Towards Social Artificial Intelligence: Nonverbal Social Signal Prediction in A Triadic InteractionJun 10 2019We present a new research task and a dataset to understand human social interactions via computational methods, to ultimately endow machines with the ability to encode and decode a broad channel of social signals humans use. This research direction is ... More
High sensitivity measurements of the CMB power spectrum with the extended Very Small ArrayFeb 20 2004Jul 10 2004We present deep Ka-band ($\nu \approx 33$ GHz) observations of the CMB made with the extended Very Small Array (VSA). This configuration produces a naturally weighted synthesized FWHM beamwidth of $\sim 11$ arcmin which covers an $\ell$-range of 300 to ... More
Neural Volumes: Learning Dynamic Renderable Volumes from ImagesJun 18 2019Modeling and rendering of dynamic scenes is challenging, as natural scenes often contain complex phenomena such as thin structures, evolving topology, translucency, scattering, occlusion, and biological motion. Mesh-based reconstruction and tracking often ... More
Quasi-periodicities of BL Lac ObjectsJan 19 2018Jul 12 2018We review the reports of possible year-long quasi-periodicities of BL Lac objects in the $\gamma$-ray and optical bands, and present a homogeneous time analysis of the light curves of PKS2155$-$304, PG1553+113, and BL Lac. Based on results from a survey ... More
Modeling Colors of Single Attribute Variations with Application to Food AppearanceDec 18 2015This paper considers the intra-image color-space of an object or a scene when these are subject to a dominant single-source of variation. The source of variation can be intrinsic or extrinsic (i.e., imaging conditions) to the object. We observe that the ... More
A cheap data assimilation approach for expensive numerical simulationsOct 11 2016Using a very cheap Data Assimilation (DA) method, I show an alternative approach to classical DA for numerical climate models which produce a large amount of "big data". The problematic features of state-of-the-art high resolution Regional Climate Models ... More
Astrophysical and cosmological doomsdaysMay 21 2014In this dissertation we study two well known gravitational scenarios in which singularities may appear; the final state of gravitational collapse and the late time evolution of the universe. In the first scenario, we study a spherically symmetric space-time ... More
On the Simulation of Single Electron Transport in a Strongly Disordered MediumJul 15 2016Mesoscopic modeling of electron transport in disordered organic and inorganic materials is based on the many-particle Monte-Carlo simulation. The main disadvantage of this method is that the simulation becomes significantly slower by increasing electron ... More
On the Simulation of Single Electron Transport in a Strongly Disordered MediumJul 15 2016Nov 10 2016Mesoscopic simulations of electron transport in disordered materials are based on the many particle Monte-Carlo (MC) methods. One of the major disadvantages of the multi-electron MC modeling is that the simulation process becomes significantly slow as ... More
Breaking the Legend: Maxmin Fairness notion is no longer effectiveJun 19 2010In this paper we analytically propose an alternative approach to achieve better fairness in scheduling mechanisms which could provide better quality of service particularly for real time application. Our proposal oppose the allocation of the bandwidth ... More
Parameter estimation based on cumulative Kullback-Leibler divergenceJun 29 2016In this paper, we propose some estimators for the parameters of a statistical model based on Kullback-Leibler divergence of the survival function in continuous setting. We prove that the proposed estimators are subclass of "generalized estimating equations" ... More
Sonic metamaterials: reflection on the role of topology on dispersion surface morphologyJul 06 2017Investigating dispersion surface morphology of sonic metamaterials is crucial in providing information on related phenomena as inertial coupling, acoustic transparency, polarisation, and absorption. In the present study, we look into frequency surface ... More
Chaotic trigonometric Haar wavelet with focus on image encryptionDec 31 2014Apr 08 2016In this paper, after reviewing the main points of Haar wavelet transform and chaotic trigonometric maps, we introduce a new perspective of Haar wavelet transform. The essential idea of the paper is given linearity properties of the scaling function of ... More
Breaking the Legend: Maxmin Fairness notion is no longer effectiveAug 11 2010In this paper we analytically propose an alternative approach to achieve better fairness in scheduling mechanisms which could provide better quality of service particularly for real time application. Our proposal oppose the allocation of the bandwidth ... More
Revisiting electroweak baryogenesis in context of cancelation scenario in the MSSMNov 05 2006We study electric dipole moment bounds on CP-violating phases in the MSSM with special emphasis on the cancelation scenario. We find that in the range favored by electroweak baryogenesis ({\it i.e.,} $|\mu|\simeq M_1$ or $|\mu|\simeq M_2$), $\sin [\theta_\mu+\theta_{M_1}]$ ... More
Top pair Asymmetries at Hadron colliders with general $Z'$ couplingsJul 03 2012Dec 22 2012Recently it has been shown that measurement of charge asymmetry of top pair production at LHC excludes any flavor violating $Z'$ vector gauge boson that could explain Tevatron forward-backward asymmetry (FBA). We consider the general form of a $Z'$ gauge ... More
A characterization of 2-dimensional Cayley graphs on dihedral groupsJan 29 2017In this paper we characterize all of Cayley graphs on dihedral groups with metric dimension two.
A Way Memoization Technique for Reducing Power Consumption of Caches in Application Specific Integrated ProcessorsOct 25 2007This paper presents a technique for eliminating redundant cache-tag and cache-way accesses to reduce power consumption. The basic idea is to keep a small number of Most Recently Used (MRU) addresses in a Memory Address Buffer (MAB) and to omit redundant ... More
Scale-Invariant Two Component Dark MatterAug 27 2018We study a scale invariant extension of the standard model which can explain simultaneously dark matter and the hierarchy problem. In our set-up, we introduce a scalar and a spinor as two-component dark matter in addition to scalon field as a mediator. ... More
Quantum effects of massive modes in a cosmological quantum space-timeNov 27 2015The quantum theory of a massive, minimally coupled scalar field on an isotropic cosmological quantum space-time is revisited. The interplay between the quantum background and the massive modes of the field, when disregarding their back-reaction effects, ... More
Conformal vector dark matter and strongly first-order electroweak phase transitionJan 14 2019Apr 01 2019We study a conformal version of the Standard Model (SM), which apart from SM sector, containing a $ U_{D}(1) $ dark sector with a vector dark matter candidate and a scalar field (scalon). In this model the dark sector couples to the SM sector via a Higgs ... More
On a variational method for solving a class of $p$-Kirchhoff type problemFeb 10 2016In this paper we are concerned with some $p$-Kirchhoff type problems involving sign-changing weight functions. We prove the existence of multiple positive solutions of the problem via the Nehari manifold approach.
Search for very-high-energy gamma-ray emission from the microquasar Cygnus X-1 with the MAGIC telescopesAug 11 2017The microquasar Cygnus X-1 displays the two typical soft and hard X-ray states of a black-hole transient. During the latter, Cygnus X-1 shows a one-sided relativistic radio-jet. Recent detection of the system in the high energy (HE; $E\gtrsim60$ MeV) ... More
Performance of the MAGIC telescopes under moonlightApr 04 2017Aug 02 2017MAGIC, a system of two imaging atmospheric Cherenkov telescopes, achieves its best performance under dark conditions, i.e. in absence of moonlight or twilight. Since operating the telescopes only during dark time would severely limit the duty cycle, observations ... More
A Performance Analysis for UMTS Packet Switched Network Based on Multivariate KPISMar 29 2010Mobile data services are penetrating mobile markets rapidly. The mobile industry relies heavily on data service to replace the traditional voice services with the evolution of the wireless technology and market. A reliable packet service network is critical ... More
AMR Parsing using Stack-LSTMsJul 24 2017Aug 02 2017We present a transition-based AMR parser that directly generates AMR parses from plain text. We use Stack-LSTMs to represent our parser state and make decisions greedily. In our experiments, we show that our parser achieves very competitive scores on ... More
Creation of particles in a cyclic universe driven by loop quantum cosmologyDec 02 2014May 22 2015We consider an isotropic and homogeneous universe in loop quantum cosmology. We assume that the matter content of the universe is dominated by dust matter in early time and a phantom matter at late time which constitutes the dark energy component. The ... More
Electronic Energy Transfer: Localized Operator Partitioning of Electronic Energy in Composite Quantum SystemsAug 29 2012A Hamiltonian based approach using spatially localized projection operators is introduced to give precise meaning to the chemically intuitive idea of the electronic energy on a quantum subsystem. This definition facilitates the study of electronic energy ... More
Some characterizations of special rings by delta-invariantAug 26 2017Nov 27 2018This paper is devoted to present some characterizations for a local ring to be generically Gorenstein and Gorenstein by means of $\delta$-invariant and linkage theory.
A Window on the CP-violating Phases of MSSM from Lepton Flavor Violating ProcessesOct 23 2008Jan 18 2009It has recently been shown that by measuring the transverse polarization of the final particles in the LFV processes $\mu \to e\gamma$, $\mu \to eee$ and $\mu N\to e N$, one can derive information on the CP-violating phases of the underlying theory. We ... More
Properties of modules with zero delta invariantNov 11 2018Nov 22 2018Let $R$ be a Cohen-Macaulay local ring, $I$ a strongly Cohen-Macaulay ideal of $R$. It is shown that there exists a Cohen-Macaulay ideal $J$ of $R$ such that the $\delta_{R/J}$-invariant of all Koszul homologies of $R$ with respect $I$ is zero. Also we ... More
The impact of cell site re-homing on the performance of umts core networksMar 30 2010Mobile operators currently prefer optimizing their radio networks via re-homing or cutting over the cell sites in 2G or 3G networks. The core network, as the parental part of radio network, is inevitably impacted by the re-homing in radio domain. This ... More
Limits on the flux of tau neutrinos from 1 PeV to 3 EeV with the MAGIC telescopesMay 07 2018A search for tau neutrino induced showers with the MAGIC telescopes is presented. The MAGIC telescopes located at an altitude of 2200 m a.s.l. in the Canary Island of La Palma, can point towards the horizon or a few degrees below across an azimuthal range ... More
Constraining Lorentz invariance violation using the Crab Pulsar emission observed up to TeV energies by MAGICSep 01 2017Spontaneous breaking of Lorentz symmetry at energies on the order of the Planck energy or lower is predicted by many quantum gravity theories, implying non-trivial dispersion relations for the photon in vacuum. Consequently, gamma-rays of different energies, ... More
Observation of the Black Widow B1957+20 millisecond pulsar binary system with the MAGIC telescopesJun 05 2017B1957+20 is a millisecond pulsar located in a black widow type compact binary system with a low mass stellar companion. The interaction of the pulsar wind with the companion star wind and/or the interstellar plasma is expected to create plausible conditions ... More
Dynamics of apparent horizons in quantum gravitational collapseJun 14 2013We study the gravitational collapse of a massless scalar field within the effective scenario of loop quantum gravity. Classical singularity is avoided and replaced by a quantum bounce in this model. It is shown that, quantum gravity effects predict a ... More
Attention-based Vocabulary Selection for NMT DecodingJun 12 2017Neural Machine Translation (NMT) models usually use large target vocabulary sizes to capture most of the words in the target language. The vocabulary size is a big factor when decoding new sentences as the final softmax layer normalizes over all possible ... More
Weakly Supervised Action Segmentation Using Mutual ConsistencyApr 05 2019Action segmentation is the task of predicting the actions in each frame of a video. Because of the high cost of preparing training videos with full supervision for action segmentation, weakly supervised approaches which are able to learn only from transcripts ... More
Monocular Total Capture: Posing Face, Body, and Hands in the WildDec 04 2018We present the first method to capture the 3D total motion of a target person from a monocular view input. Given an image or a monocular video, our method reconstructs the motion from body, face, and fingers represented by a 3D deformable mesh model. ... More
PixelNN: Example-based Image SynthesisAug 17 2017We present a simple nearest-neighbor (NN) approach that synthesizes high-frequency photorealistic images from an "incomplete" signal such as a low-resolution image, a surface normal map, or edges. Current state-of-the-art deep generative models designed ... More
On interplay between the Frobenius functor and its dualMar 13 2019For a commutative Noetherian ring $R$ of prime characteristic, denote by $^{f}R$ the ring $R$ with the left structure given by the Frobenius map. We develop Thomas Marley's work on the property of the Frobenius functor $\F(-) = - \otimes_R {^f}R$ and ... More
Semiclassical dynamics of horizons in spherically symmetric collapseMar 25 2013Apr 30 2014In this work, we consider a semiclassical description of the spherically symmetric gravitational collapse with a massless scalar field. In particular, we employ an effective scenario provided by holonomy corrections from loop quantum gravity, to the homogeneous ... More
Majorana Zero Modes in Superconducting Proximity-coupled Magnetic Domain WallMar 23 2016We propose a simple model consisting of a magnetic domain wall proximity-coupled to an $s$-wave superconductor for realization of Majorana zero-energy modes. A spin-dependent gauge transformation translates the rotating magnetic profile through the domain ... More
Genetic Algorithm-based Mapper to Support Multiple Concurrent Users on Wireless TestbedsSep 18 2016Communication and networking research introduces new protocols and standards with an increasing number of researchers relying on real experiments rather than simulations to evaluate the performance of their new protocols. A number of testbeds are currently ... More
Footprint of Triplet Scalar Dark Matter in Direct, Indirect Search and Invisible Higgs DecayJan 25 2015In this talk, we will review Inert Triplet Model (ITM) which provide candidate for dark matter (DM) particles. Then we study possible decays of Higgs boson to DM candidate and apply current experimental data for invisible Higgs decay to constrain parameter ... More
Deep Relative AttributesDec 13 2015Sep 13 2016Visual attributes are great means of describing images or scenes, in a way both humans and computers understand. In order to establish a correspondence between images and to be able to compare the strength of each property between images, relative attributes ... More
On interplay between the Frobenius functor and its dualMar 13 2019Jun 20 2019For a commutative Noetherian ring $R$ of prime characteristic, denote by $^{f}R$ the ring $R$ with the left structure given by the Frobenius map. We develop Thomas Marley's work on the property of the Frobenius functor $\F(-) = - \otimes_R {^f}R$ and ... More
Multi-wavelength characterization of the blazar S5~0716+714 during an unprecedented outburst phaseJul 01 2018The BL Lac object S5~0716+714, a highly variable blazar, underwent an impressive outburst in January 2015 (Phase A), followed by minor activity in February (Phase B). The MAGIC observations were triggered by the optical flux observed in Phase A, corresponding ... More
Gamma-ray flaring activity of NGC 1275 in 2016-2017 measured by MAGICJun 05 2018We report on the detection of flaring activity from the Fanaroff-Riley I radio galaxy NGC 1275 in very-high-energy (VHE, E $>$ 100 GeV) gamma rays with the MAGIC telescopes. Observations were performed between 2016 September and 2017 February as part ... More
Multidimensional Lévy White Noises in Weighted Besov SpacesMar 04 2016In this paper, we study the Besov regularity of d-dimensional L\'evy white noises. More precisely, we describe new sample paths properties of a given white noise in terms of weighted Besov spaces. In particular, the smoothness and integrability properties ... More
Interpolation of Sparse Graph Signals by Sequential Adaptive ThresholdsJul 22 2016May 06 2017This paper considers the problem of interpolating signals defined on graphs. A major presumption considered by many previous approaches to this problem has been lowpass/ band-limitedness of the underlying graph signal. However, inspired by the findings ... More
On the Brown--Shields conjecture for cyclicity in the Dirichlet spaceSep 26 2008Let $\cD$ be the Dirichlet space, namely the space of holomorphic functions on the unit disk whose derivative is square-integrable. We establish a new sufficient condition for a function $f\in\cD$ to be {\em cyclic}, i.e. for $\{pf: p\text{a polynomial}\}$ ... More
First Multi-wavelength Campaign on the Gamma-ray-loud Active Galaxy IC 310Mar 22 2017The extragalactic VHE gamma-ray sky is rich in blazars. These are jetted active galactic nuclei viewed at a small angle to the line-of-sight. Only a handful of objects viewed at a larger angle are known so far to emit above 100 GeV. Multi-wavelength studies ... More
An Algorithm for Sparsity Promoting Interpolation of Graph SignalsJul 22 2016Sep 12 2016This paper considers the problem of interpolating signals defined on graphs. A major presumption considered by many previous approaches to this problem has been low-pass/band-limitedness of the underlying graph signal. However, inspired by the findings ... More
An Iterative Thresholding Algorithm for Sparsity Promoting Interpolation of Graph SignalsJul 22 2016Oct 11 2016This paper considers the problem of interpolating signals defined on graphs. A major presumption considered by many previous approaches to this problem has been low-pass/band-limitedness of the underlying graph signal. However, inspired by the findings ... More
An Efficient Approach Toward the Asymptotic Analysis of Node-Based Recovery Algorithms in Compressed SensingJan 13 2010In this paper, we propose a general framework for the asymptotic analysis of node-based verification-based algorithms. In our analysis we tend the signal length $n$ to infinity. We also let the number of non-zero elements of the signal $k$ scale linearly ... More
Public key Steganography Using Discrete Cross-Coupled Chaotic MapsNov 01 2012By cross-coupling two logistic maps a novel method is proposed for the public key steganography in JPEG image. Chaotic maps entail high complexity in the used algorithm for embedding secret data in a medium. In this paper, discrete cross- coupled chaotic ... More
How useful is photo-realistic rendering for visual learning?Mar 26 2016Sep 08 2016Data seems cheap to get, and in many ways it is, but the process of creating a high quality labeled dataset from a mass of data is time-consuming and expensive. With the advent of rich 3D repositories, photo-realistic rendering systems offer the opportunity ... More
Analysis and Design of Irregular Graphs for Node-Based Verification-Based Recovery Algorithms in Compressed SensingApr 23 2012In this paper, we present a probabilistic analysis of iterative node-based verification-based (NB-VB) recovery algorithms over irregular graphs in the context of compressed sensing. Verification-based algorithms are particularly interesting due to their ... More
Quantum field theory on LQC Bianchi spacetimesMay 20 2013Quantum theory of a scalar field is developed on the LQC Bianchi I space-time. By comparing the the quantum field theory for a single mode on classical and quantum background geometries we find that an effective Bianchi I space-time emerges. We show that ... More
Improved dynamics and gravitational collapse of tachyon field coupled with a barotropic fluidAug 22 2013Jan 15 2015We consider a spherically symmetric gravitational collapse of a tachyon field with an inverse square potential, which is coupled with a barotropic fluid. By employing an holonomy correction imported from loop quantum cosmology, we analyse the dynamics ... More
Image Encryption Based On Gradient Haar Wavelet and Rational Order Chaotic MapsApr 08 2016Haar wavelet is one of the best mathematical tools in image cryptography and analysis. Because of the specific structure, this wavelet has the ability which is combined with other mathematical tools such as chaotic maps. The rational order chaotic maps ... More
Survey on the Event Orderings Semantics Used for Distributed SystemJun 07 2010Event ordering in distributed system (DS) is disputable and proactive subject in DS particularly with the emergence of multimedia synchronization. According to the literature, different type of event ordering is used for different DS mode such as asynchronous ... More
The s-Channel Single Top Quark Production as a Constraint for $W'$ Boson ContributionJul 22 2017An analysis is performed to constrain the $W'$ boson production using the measurement of the s-channel single top quark production cross section. Both phenomenological and statistical approaches are examined and results are presented. In the best case, ... More
The Impact of Kaluza-Klein Excited W Boson on the Single Top at LHC and Comparison with other ModelsJun 14 2010Aug 30 2010We study the s-channel single top quark production at the LHC in the context of extra dimension theories, including the Kaluza-Klein (KK) decomposition. It is shown that the presence of the first KK excitation of $W$ gauge boson can reduce the total cross ... More
Impact of Torsion Space-Time on $t\bar{t}$ observables at Hadron CollidersJan 22 2013Apr 23 2013Starting from the effective torsion space-time model, we study its effects on the top pair production cross section at hadron colliders. We also study the effect of this model on top pair asymmetries at the Tevatron and the LHC. We find that torsion space-time ... More