Results for "Yaser Sheikh"

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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
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
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
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
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
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
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
Realtime Multi-Person 2D Pose Estimation using Part Affinity FieldsNov 24 2016We present a realtime approach for multi-person 2D pose estimation that predicts vector fields, which we refer to as Part Affinity Fields (PAFs), that directly expose the association between anatomical parts in an image. The architecture is designed to ... More
Capture Dense: Markerless Motion Capture Meets Dense Pose EstimationDec 05 2018Dec 11 2018We present a method to combine markerless motion capture and dense pose feature estimation into a single framework. We demonstrate that dense pose information can help for multiview/single-view motion capture, and multiview motion capture can help the ... More
Structure from Recurrent Motion: From Rigidity to RecurrencyApr 18 2018This paper proposes a new method for Non-Rigid Structure-from-Motion (NRSfM) from a long monocular video sequence observing a non-rigid object performing recurrent and possibly repetitive dynamic action. Departing from the traditional idea of using linear ... More
Recycle-GAN: Unsupervised Video RetargetingAug 15 2018We introduce a data-driven approach for unsupervised video retargeting that translates content from one domain to another while preserving the style native to a domain, i.e., if contents of John Oliver's speech were to be transferred to Stephen Colbert, ... More
Convolutional Pose MachinesJan 30 2016Apr 12 2016Pose Machines provide a sequential prediction framework for learning rich implicit spatial models. In this work we show a systematic design for how convolutional networks can be incorporated into the pose machine framework for learning image features ... More
Efficient Online Multi-Person 2D Pose Tracking with Recurrent Spatio-Temporal Affinity FieldsNov 29 2018Mar 24 2019We present an online approach to efficiently and simultaneously detect and track the 2D pose of multiple people in a video sequence. We build upon Part Affinity Field (PAF) representation designed for static images, and propose an architecture that can ... 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
Efficient Online Multi-Person 2D Pose Tracking with Recurrent Spatio-Temporal Affinity FieldsNov 29 2018Jun 12 2019We present an online approach to efficiently and simultaneously detect and track the 2D pose of multiple people in a video sequence. We build upon Part Affinity Field (PAF) representation designed for static images, and propose an architecture that can ... 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
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
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
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
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.
OpenPose: Realtime Multi-Person 2D Pose Estimation using Part Affinity FieldsDec 18 2018Realtime multi-person 2D pose estimation is a key component in enabling machines to have an understanding of people in images and videos. In this work, we present a realtime approach to detect the 2D pose of multiple people in an image. The proposed method ... More
LBS Autoencoder: Self-supervised Fitting of Articulated Meshes to Point CloudsApr 22 2019We present LBS-AE; a self-supervised autoencoding algorithm for fitting articulated mesh models to point clouds. As input, we take a sequence of point clouds to be registered as well as an artist-rigged mesh, i.e. a template mesh equipped with a linear-blend ... More
Automatic Adaptation of Person Association for Multiview Tracking in Group ActivitiesMay 22 2018Nov 15 2018Reliable markerless motion tracking of multiple people participating in complex group activity from multiple handheld cameras is challenging due to frequent occlusions, strong viewpoint and appearance variations, and asynchronous video streams. The key ... More
Supervision-by-Registration: An Unsupervised Approach to Improve the Precision of Facial Landmark DetectorsJul 03 2018Jul 04 2018In this paper, we present supervision-by-registration, an unsupervised approach to improve the precision of facial landmark detectors on both images and video. Our key observation is that the detections of the same landmark in adjacent frames should be ... More
OpenPose: Realtime Multi-Person 2D Pose Estimation using Part Affinity FieldsDec 18 2018May 30 2019Realtime multi-person 2D pose estimation is a key component in enabling machines to have an understanding of people in images and videos. In this work, we present a realtime approach to detect the 2D pose of multiple people in an image. The proposed method ... 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
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
Cold Plasma Wave Analysis in Magneto-Rotational FluidsMay 25 2010This paper is devoted to investigate the cold plasma wave properties. The analysis has been restricted to the neighborhood of the pair production region of the Kerr magnetosphere. The Fourier analyzed general relativistic magnetohydrodynamical equations ... 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
Residual Diffeomorphisms and Symplectic Softs Hairs: The Need to Refine Strict Statement of Equivalence PrincipleMar 25 2016Sep 05 2016General covariance is the cornerstone of Einstein's General Relativity (GR) and implies that any two metrics related by diffeomorphisms are physically equivalent. There are, however, many examples pointing to the fact that this strict statement of general ... More
Wave Properties of Isothermal Magneto-Rotational FluidsAug 28 2009In this paper, the isothermal plasma wave properties in the neighborhood of the pair production region for the Kerr black hole magnetosphere are discussed. We have considered the Fourier analyzed form of the perturbed general relativistic magnetohydrodynamical ... More
Complex Wave Numbers in the Vicinity of the Schwarzschild Event HorizonDec 05 2007This paper is devoted to investigate the cold plasma wave properties outside the event horizon of the Schwarzschild planar analogue. The dispersion relations are obtained from the corresponding Fourier analyzed equations for non-rotating and rotating, ... More
Effects of Schwarzschild Black Hole Horizon on Isothermal Plasma Wave DispersionAug 20 2007The 3+1 GRMHD equations for Schwarzschild spacetime in Rindler coordinates with isothermal state of plasma are formulated. We consider the cases of non-rotating and rotating backgrounds with non-magnetized and magnetized plasmas. For these cases, the ... More
Cold Plasma Dispersion Relations in the Vicinity of a Schwarzschild Black Hole HorizonMay 19 2007We apply the ADM 3+1 formalism to derive the general relativistic magnetohydrodynamic equations for cold plasma in spatially flat Schwarzschild metric. Respective perturbed equations are linearized for non-magnetized and magnetized plasmas both in non-rotating ... More
Analysis of overfitting in the regularized Cox modelApr 14 2019The Cox proportional hazards model is ubiquitous in the analysis of time-to-event data. However, when the data dimension p is comparable to the sample size $N$, maximum likelihood estimates for its regression parameters are known to be biased or break ... 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
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
Effects of Schwarzschild Geometry on Isothermal Plasma Wave DispersionDec 05 2007The behavior of isothermal plasma waves has been analyzed near the Schwarzschild horizon. We consider a non-rotating background with non-magnetized and magnetized plasmas. The general relativistic magnetohydrodynamical equations for the Schwarzschild ... More
Timelike and Spacelike Matter Inheritance Vectors in Specific Forms of Energy-Momentum TensorApr 21 2005This paper is devoted to the investigation of the consequences of timelike and spacelike matter inheritance vectors in specific forms of energy-momentum tensor, i.e., for string cosmology (string cloud and string fluid) and perfect fluid. Necessary and ... More
Isothermal Plasma Waves in Gravitomagnetic Planar AnalogueSep 15 2007We investigate the wave properties of the Kerr black hole with isothermal plasma using 3+1 ADM formalism. The corresponding Fourier analyzed perturbed GRMHD equations are used to obtain the dispersion relations. These relations lead to the real values ... More
Worldcoin: A Hypothetical Cryptocurrency for the People and its GovernmentSep 08 2018The world of cryptocurrency is not transparent enough though it was established for innate transparent tracking of capital flows. The most contributing factor is the violation of securities laws and scam in Initial Coin Offering (ICO) which is used to ... More
Video Analysis for Body-worn Cameras in Law EnforcementApr 11 2016The social conventions and expectations around the appropriate use of imaging and video has been transformed by the availability of video cameras in our pockets. The impact on law enforcement can easily be seen by watching the nightly news; more and more ... More
Infusing domain knowledge in AI-based "black box" models for better explainability with application in bankruptcy predictionMay 27 2019May 30 2019Although "black box" models such as Artificial Neural Networks, Support Vector Machines, and Ensemble Approaches continue to show superior performance in many disciplines, their adoption in the sensitive disciplines (e.g., finance, healthcare) is questionable ... 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
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
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
Symmetry-Projected Hartree-Fock-Bogoliubov EquationsJul 16 1999Symmetry-projected Hartree-Fock-Bogoliubov (HFB) equations are derived using the variational ansatz for the generalized one-body density-matrix in the Valatin form. It is shown that the projected-energy functional can be completely expressed in terms ... More
Impact of the chromo-electromagnetic field fluctuations on transport coefficients of heavy quarks and shear viscosity to entropy density ratio of quark-gluon plasmaMar 26 2019The chromo-electromagnetic field fluctuations in the quark-gluon plasma (QGP) play an important role as these field fluctuations result energy gain of heavy quarks. We consider these fluctuations and evaluate the transport coefficients, e.g., drag and ... More
Credit Default Mining Using Combined Machine Learning and Heuristic ApproachJul 02 2018Predicting potential credit default accounts in advance is challenging. Traditional statistical techniques typically cannot handle large amounts of data and the dynamic nature of fraud and humans. To tackle this problem, recent research has focused on ... More
Mining Illegal Insider Trading of Stocks: A Proactive ApproachJul 02 2018Nov 07 2018Illegal insider trading of stocks is based on releasing non-public information (e.g., new product launch, quarterly financial report, acquisition or merger plan) before the information is made public. Detecting illegal insider trading is difficult due ... More
Mining Bad Credit Card Accounts from OLAP and OLTPJul 02 2018Credit card companies classify accounts as a good or bad based on historical data where a bad account may default on payments in the near future. If an account is classified as a bad account, then further action can be taken to investigate the actual ... 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
Chaos and rotational damping in particle-rotor modelJul 27 2003Nov 11 2003The onset of chaos and the mechanism of rotational damping are studied in an exactly soluble particle-rotor model. It is shown that the degree of chaoticity as inferred from the statistical measures is closely related to the onset of rotational damping ... More
Mass-spin relation for quark anti-quark bound states in non-commutative Yang-Mills theoryMar 27 2009Oct 01 2009We investigate the relationship between mass and spin of quark anti-quark bound state in non-commutative gauge theory with N=4 supersymmetry. In the large N and large 't Hooft coupling limit, these bound states correspond to rotating open strings ending ... More
Closed-form EM for Sparse Coding and its Application to Source SeparationMay 12 2011Mar 02 2012We define and discuss the first sparse coding algorithm based on closed-form EM updates and continuous latent variables. The underlying generative model consists of a standard `spike-and-slab' prior and a Gaussian noise model. Closed-form solutions for ... More
Characterization of quark gluon plasma as seen through the energy loss of heavy quarksMar 12 2018The shear viscosity to entropy density ratio ({\eta}/s) of quark gluon plasma produced in ultra- relativistic heavy-ion collisions has been studied from the energy loss of heavy quarks in QGP medium. We have also studied the bulk viscosity to entropy ... More
Symmetry Breaking by Proton-Neutron PairingJan 20 2000The symmetries of the $t=1$ and $t=0$ pair-fields are different. The consequences for rotational spectra are discussed. For $t=1$, the concept of spontaneous breaking and subsequent restoration of the isospin symmetry turns out to be important. It permits ... More
Rotational alignment near N=Z and proton-neutron correlationsJun 29 1998Sep 09 1998The effects of the residual proton-neutron interactions on bandcrossing features are studied by means of shell model calculations for nucleons in a high-j intruder orbital. The presence of an odd-nucleon shifts the frequency of the alignment of two nucleons ... More
Anomalous rotational-alignment in N=Z nuclei and residual neutron-proton interactionMay 21 2001Jul 05 2001Recent experiments have demonstrated that the rotational-alignment for the $N=Z$ nuclei in the mass-80 region is considerably delayed as compared to the neighboring $N \ne Z$ nuclei. We investigate whether this observation can be understood by a known ... More
Isovector and isoscalar superfluid phases in rotating nucleiMay 15 2000The subtle interplay between the two nuclear superfluids, isovector T=1 and isoscalar T=0 phases, are investigated in an exactly soluble model. It is shown that T=1 and T=0 pair-modes decouple in the exact calculations with the T=1 pair-energy being independent ... More
Triaxial projected shell model approachDec 18 1998The projected shell model analysis is carried out using the triaxial Nilsson+BCS basis. It is demonstrated that, for an accurate description of the moments of inertia in the transitional region, it is necessary to take the triaxiality into account and ... 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
Locating Disruptions on Internet Paths through End-to-End MeasurementsSep 23 2012In backbone networks carrying heavy traffic loads, unwanted and unusual end-to-end delay changes can happen, though possibly rarely. In order to understand and manage the network to potentially avoid such abrupt changes, it is crucial and challenging ... More
Microscopic Formulation of Puff Field TheoryJan 28 2008We describe a generalization of Puff Field Theory to p+1 dimensions where 0 \le p \le 5. We then focus on the case of p=0, ``Puff Quantum Mechanics,'' and construct a formulation independent of string theory.
Heavy flavour Langevin diffusion with the chromo-electromagnetic field fluctuations in the quark-gluon plasmaFeb 07 2019The chromo-electromagnetic field is produced due to the motion of partons in a quark-gluon plasma created by relativistic heavy-ion collisions. The fluctuations in the produced chromo-electromagnetic field are important, since they cause heavy quarks ... 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
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
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
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
Panoptic Studio: A Massively Multiview System for Social Interaction CaptureDec 09 2016We present an approach to capture the 3D motion of a group of people engaged in a social interaction. The core challenges in capturing social interactions are: (1) occlusion is functional and frequent; (2) subtle motion needs to be measured over a space ... More
Horizon Fluffs: Near Horizon Soft Hairs as Microstates of Generic AdS_3 Black HolesAug 03 2016Aug 11 2016In [1] the "horizon fluffs" proposal is put forward to identify the microstates of three-dimensional Banados-Teitelboim-Zanelli (BTZ) black holes. The proposal is that black hole microstates, the horizon fluffs, are states labelled by the conserved charges ... More
Noncommutative $Φ^4$ Theory at Two LoopsAug 07 2000Jan 17 2001We study perturbative aspects of noncommutative field theories. This work is arranged in two parts. First, we review noncommutative field theories in general and discuss both canonical and path integral quantization methods. In the second part, we consider ... More
Neural Simpletrons - Minimalistic Directed Generative Networks for Learning with Few LabelsJun 28 2015May 03 2016Deep learning is intensively studied using supervised and unsupervised learning, and by applying probabilistic, deterministic, and bio-inspired approaches. Comparisons of different approaches such as generative and discriminative neural networks is made ... More
A Realization of the Cohen-Glashow Very Special RelativityJun 23 2008Dec 18 2008We show that the Cohen-Glashow Very Special Relativity (VSR) theory [1] can be realized as the part of the Poincar\'e symmetry preserved on a noncommutative Moyal plane with light-like noncommutativity. Moreover, we show that the three subgroups relevant ... More
Electrified BPS Giants: BPS configurations on Giant Gravitons with Static Electric FieldAug 15 2007Aug 25 2007We consider D3-brane action in the maximally supersymmetric type IIB plane-wave background. Upon fixing the light-cone gauge, we obtain the light-cone Hamiltonian which is manifestly supersymmetric. The 1/2 BPS solutions of this theory (solutions which ... More
Bianchi type-II universe with wet dark fluid in General Theory of RelativityJun 05 2017In this paper, dark energy models of the universe filled with wet dark fluid are constructed in the framework of LRS Bianchi type-II space-time in General Theory of Relativity. A new equation of state modeled on the equation of state $p$=$\gamma(\rho ... More
Improved Median Polish Kriging for Simulation MetamodelingJul 30 2013In simulation, Median Polish Kriging is a technique used to predict unobserved data points in two-dimensional space. The linear behavior of the traditional Median Polish Kriging in the estimation of the mean function in a high grid makes the interpolation ... More
BMS4 Algebra, Its Stability and DeformationsFeb 08 2019Feb 21 2019We continue analysis of \cite{Parsa:2018kys} and study rigidity and stability of the BMS4 algebra and its centrally extended version. We construct and classify the family of algebras which appear as deformations of BMS4 and in general find the four-parameter ... More
Melvin Twists of global AdS_5 \times S_5 and their Non-Commutative Field Theory DualJan 24 2008Jan 31 2008We consider the Melvin Twist of AdS_5 \times S_5 under U(1) \times U(1) isometry of the boundary S_3 of the global AdS_5 geometry and identify its field theory dual. We also study the thermodynamics of the Melvin deformed theory.
A Modified ck-Secure Sum Protocol for Multi-Party ComputationFeb 21 2010Secure Multi-Party Computation (SMC) allows multiple parties to compute some function of their inputs without disclosing the actual inputs to one another. Secure sum computation is an easily understood example and the component of the various SMC solutions. ... More
Privacy Preserving k Secure Sum ProtocolDec 04 2009Secure Multiparty Computation (SMC) allows parties to know the result of cooperative computation while preserving privacy of individual data. Secure sum computation is an important application of SMC. In our proposed protocols parties are allowed to compute ... More
First Principles Calculation of Field Emission from Nanostructures using Time-Dependent Density Functional Theory: a Simplified ApproachSep 29 2010Nov 18 2010We introduce a new simplified method for computing the electron field emission current in short carbon nanotubes using ab-initio computation in periodic simulation cells. We computed the evolution of the wave functions using Time-Dependent Density Functional ... More
Absence of Higher Order Corrections to Noncommutative Chern-Simons CouplingMar 17 2001We analyze the structure of noncommutative pure Chern-Simons theory systematically in the axial gauge. We show that there is no IR/UV mixing in this theory in this gauge. In fact, we show, using the usual BRST identities as well as the identities following ... More
Cranked shell model and isospin symmetry near N=ZAug 14 1998A cranked shell model approach for the description of rotational bands in $N\approx Z$ nuclei is formulated. The isovector neutron-proton pairing is taken into account explicitly. The concept of spontaneous breaking and subsequent restoration of the isospin ... More
Orientifolded Locally AdS3 GeometriesAug 03 2010Continuing the analysis of [arXiv:1003.4089[hep-th]], we classify all locally AdS3 stationary axi-symmetric unorientable solutions to AdS3 Einstein gravity and show that they are obtained by applying certain orientifold projection on AdS3, BTZ or AdS3 ... More