Results for "Saurabh Tripathy"

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Further counterexamples to the integral Hodge conjectureJan 22 2016We study the integral Hodge conjecture in complex codimension $2$ and $3$ for approximations to the classifying space of groups of type A. In degree two, we prove a conjecture of Ben Antieau, extending his two counterexamples to a general family of groups. ... More
Don't get Lost in Negation: An Effective Negation Handled Dialogue Acts Prediction Algorithm for Twitter Customer Service ConversationsJul 16 2018In the last several years, Twitter is being adopted by the companies as an alternative platform to interact with the customers to address their concerns. With the abundance of such unconventional conversation resources, push for developing effective virtual ... More
Using Structured Representation and Data: A Hybrid Model for Negation and Sentiment in Customer Service ConversationsJun 11 2019Twitter customer service interactions have recently emerged as an effective platform to respond and engage with customers. In this work, we explore the role of negation in customer service interactions, particularly applied to sentiment analysis. We define ... More
Recursive Neural Language Architecture for Tag PredictionMar 24 2016We consider the problem of learning distributed representations for tags from their associated content for the task of tag recommendation. Considering tagging information is usually very sparse, effective learning from content and tag association is very ... More
Spectral dimension of spheresMar 26 2018In this paper, we associate a growth graph and a length operator to a quotient space of a semisimple compact Lie group. Under certain assumptions, we show that the spectral dimension of a homogeneous space is greater than or equal to summability of the ... More
Steady State and Dynamics of Driven Diffusive Systems with Quenched DisorderApr 27 1997We study the effect of quenched disorder on nonequilibrium systems of interacting particles, specifically, driven diffusive lattice gases with spatially disordered jump rates. The exact steady-state measure is found for a class of models evolving by drop-push ... More
Deep UQ: Learning deep neural network surrogate models for high dimensional uncertainty quantificationFeb 02 2018State-of-the-art computer codes for simulating real physical systems are often characterized by a vast number of input parameters. Performing uncertainty quantification (UQ) tasks with Monte Carlo (MC) methods is almost always infeasible because of the ... More
Gravitating dyons and dyonic black holes in Einstein-Born-Infeld-Higgs modelJun 21 1999Aug 06 1999We find static spherically symmetric dyons in Einstein-Born-Infeld-Higgs model in 3+1 dimensions. The solutions share many features with the gravitating monopoles in the same model. In particular, they exist only up to some critical value of a parameter ... More
$q$-invariance of quantum quaternion spheresOct 07 2015The $C^*$-algebra of continuous functions on the quantum quaternion sphere $H_q^{2n}$ can be identified with the quotient algebra $C(SP_q(2n)/SP_q(2n-2))$. In commutative case i.e. for $q=1$, the topological space $SP(2n)/SP(2n-2)$ is homeomorphic to ... More
A note on bi-linear multipliersMar 01 2014In this paper we prove that if $\chi_{_E}(\xi-\eta)-$ the indicator function of measurable set $E\subseteq \mathbb{R}^d,$ is a bi-linear multiplier symbol for exponents $p,q,r$ satisfying the H\"{o}lder's condition $\frac{1}{p}+\frac{1}{q}=\frac{1}{r}$ ... More
Cohomology of flat currents on definable pseudomanifoldsOct 05 2016May 27 2018We show that the cohomology of flat currents on definable pseudomanifolds in polynomially bounded o-minimal structures is isomorphic to its intersection cohomology in the top perversity.
Quantum Stiefel manifoldsFeb 16 2016Quantum analogs of Stiefel manifolds $SU_{q}(n)/SU_q(n-m)$ were introduced by Podkolzin \& Vainerman. The underlying $C^*$-algebra $C(SU_{q}(n)/SU_q(n-m))$ can be described as the $C^*$-subalgebra of $C(SU_q(n))$ generated by elements of last $m$ rows ... More
A novel 2.5D approach for interfacing with web applicationsJun 09 2012Oct 02 2012Web applications need better user interface to be interactive and attractive. A new approach/concept of dimensional enhancement - 2.5D "a 2D display of a virtual 3D environment", which can be implemented in social networking sites and further in other ... More
Spectral dimension of quaternion spheresJul 29 2017Mar 21 2018Employing ideas of noncommutative geometry, certain dimensional invariant for quantum homogeneous spaces has been proposed and here we take up its computation for quaternion spheres.
Jackiw-Pi Model: A Superfield ApproachDec 22 2014We derive the off-shell nilpotent and absolutely anticommuting Becchi-Rouet-Stora-Tyutin (BRST) as well as anti-BRST transformations s_{(a)b} corresponding to the Yang-Mills gauge transformations of 3D Jackiw-Pi model by exploiting the "augmented" superfield ... More
Hopping-disorder-induced effects upon the two-Magnon Raman Scattering spectrum in an AntiferromagnetSep 18 1998Two-magnon Raman scattering intensity is obtained for two-dimensional spin-1/2 antiferromagnets in presence of hopping disorder. A consistent mode assignment scheme is prescribed which essentially establishes a correspondence between the hopping-disordered ... More
The Hodge-elliptic genus, spinning BPS states, and black holesSep 07 2016We perform a refined count of BPS states in the compactification of M-theory on $K3 \times T^2$, keeping track of the information provided by both the $SU(2)_L$ and $SU(2)_R$ angular momenta in the $SO(4)$ little group. Mathematically, this four variable ... More
Driven Lattice Gases with Quenched Disorder: Exact Results and Different Macroscopic RegimesNov 27 1997We study the effect of quenched spatial disorder on the steady states of driven systems of interacting particles. Two sorts of models are studied: disordered drop-push processes and their generalizations, and the disordered asymmetric simple exclusion ... More
On Computation Rates for Arithmetic SumJan 26 2016For zero-error function computation over directed acyclic networks, existing upper and lower bounds on the computation capacity are known to be loose. In this work we consider the problem of computing the arithmetic sum over a specific directed acyclic ... More
Capacity of Sum-networks for Different Message AlphabetsApr 21 2015A sum-network is a directed acyclic network in which all terminal nodes demand the `sum' of the independent information observed at the source nodes. Many characteristics of the well-studied multiple-unicast network communication problem also hold for ... More
Late time Acceleration and Role of Skewness in Anisotropic modelsJul 26 2014We study cosmological models with anisotropy in expansion rates in the context of the recent observations predicting an accelerating universe. In the absence of any anisotropy in the cosmic fluid, it is shown that the role of skewness in directional Hubble ... More
Programming Internet of Things, Service, and People (IoTSP) ApplicationsJul 12 2016Application development for Internet of Things, Service, and People (IoTSP) is challenging because it involves dealing with the heterogeneity that exists both in Physical and Internet worlds. Second, stakeholders involved in the application development ... More
Transversality theorems for the weak topologyOct 10 2011In his 1979 paper Trotman proves, using the techniques of the Thom transversality theorem, that under some conditions on the dimensions of the manifolds under consideration, openness of the set of maps transverse to a stratification in the strong (Whitney) ... More
A characterization of Whitney a-regular complex analytic stratificationsSep 06 2012Dec 09 2012We prove that the openness of the set of maps, between a Stein manifold and an Oka manifold, transverse to a stratification of a complex analytic subvariety in the target implies that the stratification is Whitney $a$-regular. Our result can be seen as ... More
The Hodge-elliptic genus, spinning BPS states, and black holesSep 07 2016Oct 15 2016We perform a refined count of BPS states in the compactification of M-theory on $K3 \times T^2$, keeping track of the information provided by both the $SU(2)_L$ and $SU(2)_R$ angular momenta in the $SO(4)$ little group. Mathematically, this four variable ... More
Refractive Indices of Semiconductors from Energy gapsJul 16 2015An empirical relation based on energy gap and refractive index data has been proposed in the present study to calculate the refractive index of semiconductors. The proposed model is then applied to binary as well as ternary semiconductors for a wide range ... More
Deep active subspaces - a scalable method for high-dimensional uncertainty propagationFeb 27 2019Feb 28 2019A problem of considerable importance within the field of uncertainty quantification (UQ) is the development of efficient methods for the construction of accurate surrogate models. Such efforts are particularly important to applications constrained by ... More
Generalized Attractors in Five-Dimensional Gauged SupergravityJun 18 2012Aug 21 2012In this paper we study generalized attractors in N=2 gauged supergravity theory in five dimensions coupled to arbitrary number of hyper, vector and tensor multiplets. We look for attractor solutions with constant anholonomy coefficients. By analyzing ... More
A Quantum Mechanical Approach To A System of Self-Gravitating Particles And The Problem of Gravitational CollapseDec 10 1996By making an intuitive choice for the single-particle density of a system of N self-gravitating particles, without any source for the radiation of energy, we have been able to calculate the binding energy of the system by treating these particles as fermions. ... More
Robust Node ID Assignment for Mobile P2P NetworksMay 14 2019The advancement of portable mobile wireless devices such as smart-phones, PDA, etc., brought mobile peer-to-peer (P2P) as an extension of traditional P2P networks to provide efficient, low-cost communication among them in a cellular network. It is challenging ... More
An Understanding of The Dark Matter in The Universe And The Variation of The Universal Gravitational Constant G With TimeMay 11 1997May 12 1997Considering the fact that the present universe might have been formed out of a system of ficticious self-gravitating particles, fermionic in nature, each of mass $m$, we are able to obtain a compact expression for the radius $R_0$ of the universe by using ... More
The non-Abelian T-dual of Klebanov-Witten Background and its Penrose LimitsJul 03 2019In this paper we consider both Abelian as well as non-Abelian T-duals of the Klebanov-Witten background and inspect their various Penrose limits. We show that these backgrounds admit pp-wave solutions in the neighbourhood of appropriate null geodesics. ... More
Non-Supersymmetric Stringy AttractorsSep 30 2011Oct 09 2011In this paper we examine the stability of non-supersymmetric attractors in type IIA supergravity compactified on a Calabi-Yau manifold, in the presence of sub-leading corrections to the N=$ pre-potential. We study black hole configurations carrying D0-D6 ... More
InfoRest: Restricting Privacy Leakage to Online Social Network AppMay 15 2019In recent years, Online Social Networks (OSNs) have become immensely popular as social interaction services among worldwide Internet users. OSNs facilitate Third-party applications (TPAs) which provide many additional functionalities to users. While providing ... More
Anisotropic solutions in f(R) GravityJan 18 2016Anisotropic cosmological models are investigated in the frame work of $f(R)$ gravity in the metric formalism. Plane symmetric models are considered to incorporate anisotropy in the expansion rates along different spatial directions. The anisotropy in ... More
A quantum mechanical derivation of Gamow's relation for the time and temperature of the expanding UniverseDec 10 1999The quantum mechanical approach developed by us recently for the evolution of the universe is used to derive an alternative derivation connecting the temperature of the cosmic background radiation and the age of the universe which is found to be similar ... More
Fluctuation and relaxation properties of pulled fronts: a possible scenario for non-Kardar-Parisi-Zhang behaviorMay 08 2000Jul 11 2000We argue that while fluctuating fronts propagating into an unstable state should be in the standard KPZ universality class when they are {\em pushed}, they should not when they are {\em pulled}: The universal $1/t$ velocity relaxation of deterministic ... More
Top Quarks and $CP$ Violation in Polarized $e^+e^-$ CollisionsSep 07 1994Electroweak dipole moments of the top quark are conjectured and their effect in polarized $e^+e^-$ collisions is examined for the expectation values of two different $CP$-odd observables. One of these observables probes the real part of the dipole moments ... More
Is the composite fermion state of Graphene a Haldane's Chern insulator?Dec 25 2018The properties of interacting electrons in a half-filled Landau level are well addressed by the Halperin-Lee-Read (HLR) picture of non-interacting composite fermions. We discuss how such a prescription can be applied to a lattice system. Introducing a ... More
EvalNorm: Estimating Batch Normalization Statistics for EvaluationApr 12 2019Batch normalization (BN) has been very effective for deep learning and is widely used. However, when training with small minibatches, models using BN exhibit a significant degradation in performance. In this paper we study this peculiar behavior of BN ... More
Anomalous low-temperature thermodynamics of QCD in strong magnetic fieldsJun 14 2017Nov 13 2017The thermodynamics of quantum chromodynamics at low temperatures and in sufficiently strong magnetic fields is governed by neutral pions. We analyze the interacting system of neutral pions and photons at zero baryon chemical potential using effective ... More
Boundedness of smooth bilinear square functions and applications to some bilinear pseudo-differential operatorsOct 07 2010Oct 23 2010This paper is devoted to the proof of boundedness of bilinear smooth square functions. Moreover, we deduce boundedness of some bilinear pseudo-differential operators associated with symbols belonging to a subclass of $BS^0_{0,0}$.
Automatically finding atomic regions for fixing bugs in Concurrent programsMar 07 2014This paper presents a technique for automatically constructing a fix for buggy concurrent programs: given a concurrent program that does not satisfy user-provided assertions, we infer atomic blocks that fix the program. An atomic block protects a piece ... More
Feature Selection for Ridge Regression with Provable GuaranteesJun 17 2015Dec 05 2015We introduce single-set spectral sparsification as a deterministic sampling based feature selection technique for regularized least squares classification, which is the classification analogue to ridge regression. The method is unsupervised and gives ... More
Pre-processing of Domain Ontology Graph Generation System in PunjabiNov 21 2014This paper describes pre-processing phase of ontology graph generation system from Punjabi text documents of different domains. This research paper focuses on pre-processing of Punjabi text documents. Pre-processing is structured representation of the ... More
Network Flow Routing under Strategic Link DisruptionsDec 31 2015Jan 26 2016This paper considers a 2-player strategic game for network routing under link disruptions. Player 1 (defender) routes flow through a network to maximize her value of effective flow while facing transportation costs. Player 2 (attacker) simultaneously ... More
Assessing site response through H/V ratio in a seismic prone area of northeast IndiaMay 08 2017We endeavor to assess site response exploiting ambient noise measurements which we carried out at 70 sites in different parts of Shillong City, one of the seismically active regions. We estimate the spectral ratio from these recordings. The spectral ratios ... More
Anti Self-Dual Yang-Mills, Modified Faddeev-Jackiw Formalism and Hidden BRS InvarianceMar 30 2016Aug 29 2016We analyze the constraints for a system of anti self-dual Yang-Mills (ASDYM) equations by means of the modified Faddeev-Jackiw method in K and J gauges \`{a} la Yang. We also establish the Hamiltonian flow for ASDYM system through the hidden BRS invariance ... More
Stability and Control of Piecewise-Deterministic Queueing SystemsApr 07 2016Apr 08 2016Unreliable link capacities cause a significant amount of delay in transportation networks. In this paper, we propose a novel approach to studying the traffic queues due to capacity-reducing events under a class of control policies. First, we propose a ... More
Resilience Design Patterns - A Structured Approach to Resilience at Extreme ScaleNov 08 2016In this document, we develop a structured approach to the management of HPC resilience based on the concept of resilience-based design patterns. A design pattern is a general repeatable solution to a commonly occurring problem. We identify the commonly ... More
The redshifted 21-cm signal in the EDGES low-band spectrumMar 11 2019The EDGES collaboration reported the finding of an unexpectedly deep absorption in the radio background at 78~MHz based on their low-band observations, and interpreted the dip as a first detection of redshifted 21-cm from Cosmic Dawn. We have attempted ... More
An Open Source P2P Encrypted VoIP ApplicationJul 01 2014Open source is the future of technology. This community is growing by the day; developing and improving existing frameworks and software for free. Open source replacements are coming up for almost all proprietary software nowadays. This paper proposes ... More
Corrigendum to "Random grid-based visual secret sharing with abilities of OR and XOR decryptions"[Journal of Visual Communication and Image Representation. 24(2013) 48-62]Feb 17 2015It has been observed that the contrast values for (2, 3) VSS scheme, (2, 4) VSS scheme, (3, 5) VSS scheme and (4, 5) VSS scheme claimed by Wu and Sun (2013) are found to be incorrect. Since the same values are cited and compared by many other researchers ... More
Magnetic adatoms in two and four terminal graphene nanoribbons: A comparison between their spin polarized transportJul 12 2017We study the charge and spin transport in two and four terminal graphene nanoribbons (GNR) decorated with random distribution of magnetic adatoms. The inclusion of the magnetic adatoms generates only the $z$-component of the spin polarized conductance ... More
Improving Performance Of English-Hindi Cross Language Information Retrieval Using Transliteration Of Query TermsJan 15 2014The main issue in Cross Language Information Retrieval (CLIR) is the poor performance of retrieval in terms of average precision when compared to monolingual retrieval performance. The main reasons behind poor performance of CLIR are mismatching of query ... More
Learning an Unknown Network State in Routing GamesMay 11 2019We study learning dynamics induced by myopic travelers who repeatedly play a routing game on a transportation network with an unknown state. The state impacts cost functions of one or more edges of the network. In each stage, travelers choose their routes ... More
Formation and decay of Bose-Einstein condensates in an excited band of a double-well optical latticeAug 20 2013We study the formation and collision-aided decay of an ultra-cold atomic Bose-Einstein condensate in the first excited band of a double-well 2D-optical lattice with weak harmonic confinement in the perpendicular $z$ direction. This lattice geometry is ... More
Mesoscale computational protocols for the design of highly cooperative bivalent macromoleculesAug 22 2019The last decade has witnessed a swiftly increasing interest in the design and production of novel multivalent molecules as powerful alternatives for conventional antibodies in the fight against cancer and infectious diseases. However, while it is widely ... More
Pinaka: Symbolic Execution meets Incremental Solving (Competition Contribution)Mar 06 2019Many modern-day solvers offer functionality for incremental SAT solving, which preserves the state of the solver across invocations. This is beneficial when multiple, closely related SAT queries need to be fed to the solver. Pinaka is a symbolic execution ... More
Transversality of smooth definable maps in O-minimal structuresNov 29 2017We present a definable smooth version of the Thom transversality theorem. We show further that the set of non-transverse definable smooth maps is nowhere dense in the definable smooth topology. Finally, we prove a definable version of a theorem of Trotman ... More
W boson polarization as a measure of gauge-Higgs anomalous couplings at the LHCMay 17 2018Jan 29 2019We show how the $W$ boson polarization in the process of associated $W^{\pm}H$ production at the Large Hadron Collider (LHC) can be used to constrain anomalous $WWH$ couplings. We first calculate the spin density matrix for the $W$ to linear order in ... More
Multitask Learning for Sequence Labeling TasksApr 25 2014May 09 2016In this paper, we present a learning method for sequence labeling tasks in which each example sequence has multiple label sequences. Our method learns multiple models, one model for each label sequence. Each model computes the joint probability of all ... More
EvalNorm: Estimating Batch Normalization Statistics for EvaluationApr 12 2019Aug 13 2019Batch normalization (BN) has been very effective for deep learning and is widely used. However, when training with small minibatches, models using BN exhibit a significant degradation in performance. In this paper we study this peculiar behavior of BN ... More
Nilpotent Symmetries in Jackiw-Pi Model: Augmented Superfield ApproachNov 24 2014Jul 08 2015We derive the complete set of off-shell nilpotent (s^2_{(a)b} = 0) and absolutely anticommuting (s_b s_{ab} + s_{ab} s_b = 0) Becchi-Rouet-Stora-Tyutin (BRST) (s_b) as well as anti-BRST symmetry transformations (s_{ab}) corresponding to the combined Yang-Mills ... More
Canonical brackets from continuous symmetries: Abelian 2-form gauge theoryMay 07 2011We derive the canonical (anti-)commutation relations amongst the creation and annihilation operators of the various basic fields, present in the four (3 + 1)-dimensional (4D) free Abelian 2-from gauge theory, with the help of continuous symmetry transformations ... More
Analysis of a Stochastic Switched Model of Freeway Traffic IncidentsJan 02 2016Jul 07 2016This article models the interaction between freeway traffic dynamics and capacity-reducing incidents as a stochastic switching system, and provides insights for freeway incident management by analyzing long-time (stability) properties of the proposed ... More
Monopole-antimonopole: interaction, scattering and creationApr 03 2019The interaction of a magnetic monopole-antimonopole pair depends on their separation as well as on a second "twist" degree of freedom. This novel interaction leads to a non-trivial bound state solution known as a sphaleron and to scattering in which the ... More
A Survey of Inverse Reinforcement Learning: Challenges, Methods and ProgressJun 18 2018Inverse reinforcement learning is the problem of inferring the reward function of an observed agent, given its policy or behavior. Researchers perceive IRL both as a problem and as a class of methods. By categorically surveying the current literature ... More
Some Complete and Intermediate Polynomials in Algebraic Complexity TheoryMar 15 2016We provide a list of new natural $\mathsf{VNP}$-intermediate polynomial families, based on basic (combinatorial) $\mathsf{NP}$-complete problems that are complete under parsimonious reductions. Over finite fields, these families are in $\mathsf{VNP}$, ... More
A Computational Approach for Designing Tiger Corridors in IndiaOct 02 2017Wildlife corridors are components of landscapes, which facilitate the movement of organisms and processes between intact habitat areas, and thus provide connectivity between the habitats within the landscapes. Corridors are thus regions within a given ... More
Visual Semantic Role LabelingMay 17 2015In this paper we introduce the problem of Visual Semantic Role Labeling: given an image we want to detect people doing actions and localize the objects of interaction. Classical approaches to action recognition either study the task of action classification ... More
Augmented Superfield Approach to Non-Yang-Mills Symmetries of Jackiw-Pi Model: Novel ObservationsDec 26 2012Jan 31 2013We derive the off-shell nilpotent and absolutely anticommuting Becchi-Rouet-Stora-Tyutin (BRST) as well as anti-BRST symmetry transformations corresponding to the non-Yang-Mills symmetry transformations of (2 + 1)- dimensional Jackiw-Pi (JP) model within ... More
Exact ground and excited states of a t-J ladder doped with two holesDec 09 1998Jul 01 1999A two chain ladder model is considered described by the strong coupling $t-t^\prime-J-J^\prime$ Hamiltonian. For the case of two holes moving in a background of antiferromagnetically interacting spins, exact, analytical results are derived for the ground ... More
Havens: Explicit Reliable Memory Regions for HPC ApplicationsOct 26 2016Supporting error resilience in future exascale-class supercomputing systems is a critical challenge. Due to transistor scaling trends and increasing memory density, scientific simulations are expected to experience more interruptions caused by transient ... More
Flat currents on definable pseudomanifoldsOct 05 2016We show that the cohomology of flat currents on definable pseudomanifolds in polynomially bounded o-minimal structures is isomorphic to its intersection cohomology in the top perversity.
An IoT application development using IoTSuiteSep 06 2016Application development in the Internet of Things (IoT) is challenging because it involves dealing with issues that attribute to different life-cycle phases. First, the application logic has to be analyzed and then separated into a set of distributed ... More
Does curvature-dilaton coupling with Kalb Ramond field lead to an accelerating Universe ?Jul 08 2002Dec 02 2003In this work we show that the Universe evolving in a spacetime with torsion (originated from a second rank antisymmetric Kalb-Ramond field) and dilaton is free from any big bang singularity and can have acceleration during the evolution. Both the matter ... More
Spherically Symmetric Solutions of Gravitational Field Equations in Kalb-Ramond BackgroundFeb 22 2001Static spherically symmetric solution in a background spacetime with torsion is derived explicitly. The torsion considered here is identified with the field strength of a second rank antisymmetric tensor field namely the Kalb-Ramond field and the proposed ... More
Type Iax SupernovaeJul 04 2017Aug 09 2017Type Iax supernovae (SN Iax), also called SN 2002cx-like supernovae, are the largest class of peculiar white dwarf (thermonuclear) supernovae, with over fifty members known. SN Iax have lower ejecta velocity and lower luminosities, and these parameters ... More
Study of edge states and conductivity in spin-orbit coupled bilayer grapheneMay 08 2019We present an elaborate and systematic study of the conductance properties of a zigzag bilayer graphene nanoribbon modeled by a Kane-Mele (KM) Hamiltonian. The interplay of the Rashba and the intrinsic spin-orbit couplings with the edge states, electronic ... More
Adatoms in graphene nanoribbons: conductance characteristics and quantum spin Hall effectApr 21 2017May 02 2017We study the charge and spin transport in a two terminal graphene nanoribbon (GNR) decorated with random Gold (Au) adatoms using a Kane-Mele model. Two commonly used GNRs, that is, the armchair graphene nanoribbon (AGNR) and the zigzag graphene nanoribbon ... More
Spin Hall conductance in a Y-shaped junction device in presence of tunable spin-orbit couplingJul 12 2016We study spin Hall effect in a three terminal Y-shaped device in presence of tunable spin-orbit (SO) interactions via Landauer-B\"{u}ttiker formalism. We have evolved a fabrication technique for creating different angular separation between the two arms ... More
Thermopower generation and thermoelectric cooling in a Kane-Mele normal-insulator-superconductor nano-junctionDec 20 2018We have studied thermoelectric effect of a Kane-Mele normal-insulator-superconductor (KMNIS) junction at ultra-low temperatures using a modified version of the well-known Blonder-Tinkham-Klapwijk (BTK) theory. Since both the (electronic) charge and thermal ... More
Entangled System of Squarks from the Third Generation at the Large Hadron ColliderNov 01 2011In the Minimal Supersymmetric extension of the Standard Model (MSSM) squarks from the third generation, i.e., the bottom and the top squarks, have a common set of parameters that determine their masses and couplings. These are in the form of the common ... More
Security Assessment of Electricity Distribution Networks under DER Node CompromisesJan 06 2016Aug 12 2016This article focuses on the security assessment of electricity Distribution Networks (DNs) with vulnerable Distributed Energy Resource (DER) nodes. The adversary model is simultaneous compromise of DER nodes by strategic manipulation of generation set-points. ... More
Proposing A Symmetric Key Bit-Level Block CipherMay 11 2016A novel bit level block cipher based symmetric key cryptographic technique using G.C.D is proposed in this research paper. Entire plain text file is read one character at a time and according to the binary representation of ASCII value of the characters, ... More
Property-Driven Fence Insertion using Reorder Bounded Model CheckingJul 28 2014Jun 01 2015Modern architectures provide weaker memory consistency guarantees than sequential consistency. These weaker guarantees allow programs to exhibit behaviours where the program statements appear to have executed out of program order. Fortunately, modern ... More
Time-dependent potential impurity in topological insulatorApr 25 2019We consider periodically driven potential impurities coupled to the surface states of a two-dimensional topological insulator. The problem is addressed by means of two models, out which the first model is an effective continuum Hamiltonian for the surface ... More
Stability of Fluid Queuing Systems with Parallel Servers and Stochastic CapacitiesApr 07 2016Feb 16 2018This note introduces a piecewise-deterministic queueing (PDQ) model to study the stability of traffic queues in parallel-link transportation systems facing stochastic capacity fluctuations. The saturation rate (capacity) of the PDQ model switches between ... More
Wannier functions using a discrete variable representation for optical latticesSep 02 2016We propose a numerical method using the discrete variable representation (DVR) for constructing real-valued Wannier functions localized in a unit cell for both symmetric and asymmetric periodic potentials. We apply these results to finding Wannier functions ... More
A Survey of Inverse Reinforcement Learning: Challenges, Methods and ProgressJun 18 2018Aug 01 2019Inverse reinforcement learning is the problem of inferring the reward function of an observed agent, given its policy or behavior. Researchers perceive IRL both as a problem and as a class of methods. By categorically surveying the current literature ... More
On augmented superfield approach to vector Schwinger modelAug 04 2016We exploit the techniques of Bonora-Tonin superfield formalism to derive the off-shell nilpotent and absolutely anticommuting (anti-)BRST as well as (anti-)co-BRST symmetry transformations for the (1+1)-dimensional (2D) bosonized vector Schwinger model. ... More
Language Support for Reliable Memory RegionsNov 09 2016The path to exascale computational capabilities in high-performance computing (HPC) systems is challenged by the inadequacy of present software technologies to adapt to the rapid evolution of architectures of supercomputing systems. The constraints of ... More
A Parallel Simulated Annealing Approach for the Mirrored Traveling Tournament ProblemNov 08 2013The Traveling Tournament Problem (TTP) is a benchmark problem in sports scheduling and has been extensively studied in recent years. The Mirrored Traveling Tournament Problem (mTTP) is variation of the TTP that represents certain types of sports scheduling ... More
Securing Infrastructure Facilities: When does proactive defense help?Apr 02 2018Aug 22 2018Infrastructure systems are increasingly facing new security threats due to the vulnerabilities of cyber-physical components that support their operation. In this article, we investigate how the infrastructure operator (defender) should prioritize the ... More
Anomalous electrodynamics of neutral pion matter in strong magnetic fieldsJan 24 2017The ground state of quantum chromodynamics in sufficiently strong external magnetic fields and at moderate baryon chemical potential is a chiral soliton lattice (CSL) of neutral pions. We investigate the interplay between the CSL structure and dynamical ... More
Proposing A Ciphering ProtocolMay 10 2016This paper describes a novel bit level stream cipher based symmetric key cryptographic technique. At first, sender and receiver agree upon a symmetric key. Then the symmetric key is formed using Greatest Common Divisor (G.C.D) of sum of even or odd bit ... More
Faddeev-Jackiw Quantization of Christ-Lee ModelAug 15 2019We analyze the constraints of Christ-Lee model by the means of modified Faddeev-Jackiw formalism in Cartesian as well as polar coordinates. Further, we accomplish quantization \`{a} la Faddeev-Jackiw by choosing appropriate gauge conditions in both the ... More
On the Riesz means of $δ_k(n)$Sep 20 2016Let $k\geq 1$ be an integer. Let $\delta_k(n)$ denote the maximum divisor of $n$ which is co-prime to $k$. We study the error term of the general $m$-th Riesz mean of the arithmetical function $\delta_k(n)$ for any positive integer $m \ge 1$, namely the ... More
The redshifted 21-cm signal in the EDGES low-band spectrumMar 11 2019Jun 06 2019The EDGES collaboration reported the finding of an unexpectedly deep absorption in the radio background at 78 MHz and interpreted the dip as a first detection of redshifted 21-cm from Cosmic Dawn. We have attempted an alternate analysis, adopting a maximally ... More