Results for "Saiful Bari"

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A Unified Linear-Time Framework for Sentence-Level Discourse ParsingMay 14 2019Jun 12 2019We propose an efficient neural framework for sentence-level discourse analysis in accordance with Rhetorical Structure Theory (RST). Our framework comprises a discourse segmenter to identify the elementary discourse units (EDU) in a text, and a discourse ... More
A Unified Linear-Time Framework for Sentence-Level Discourse ParsingMay 14 2019We propose an efficient neural framework for sentence-level discourse analysis in accordance with Rhetorical Structure Theory (RST). Our framework comprises a discourse segmenter to identify the elementary discourse units (EDU) in a text, and a discourse ... More
Representation Formulae and Monotonicity of the Generalized k-Bessel FunctionsNov 22 2016This paper introduces and studies a generalization of the $\mathtt{k}$-Bessel function of order $\nu$ given by \[\mathtt{W}^{\mathtt{k}}_{\nu, c}(x):= \sum_{r=0}^\infty \frac{(-c)^r}{\Gamma_{\mathtt{k}}\left( r \mathtt{k} +\nu+\mathtt{k}\right) r!} \left(\frac{x}{2}\right)^{2r+\frac{\nu}{\mathtt{k}}}. ... More
The Modified Lommel functions: monotonic pattern and inequalitiesApr 15 2017This article studies the monotonicity, log-convexity of the modified Lommel functions by using its power series and infinite product representation. Same properties for the ratio of the modified Lommel functions with the Lommel function, $\sinh$ and $\cosh$ ... More
BSSSN: Bit String Swapping Sorting Network for Reversible Logic SynthesisAug 27 2010In this paper, we have introduced the notion of UselessGate and ReverseOperation. We have also given an algorithm to implement a sorting network for reversible logic synthesis based on swapping bit strings. The network is constructed in terms of n*n Toffoli ... More
Uniform 1-Cochains and Genuine LaminationsApr 07 2003Apr 25 2003We construct a pair of transverse genuine laminations on an atoroidal 3-manifold admitting transversely orientable uniform 1-cochain. The laminations are induced by the uniform 1-cochain and they are indeed the "straightening" of the coarse laminations ... More
MINERvA Detector: Description and PerformanceSep 13 2011The MINERvA experiment is aimed at precisely measuring the cross-sections for various neutrino interaction channels. It is located at Fermilab in the underground cavern in front of MINOS near detector. MINERvA is a fine-grained scintillator with electromagnetic ... More
Embeddedness of the solutions to the H-Plateau ProblemApr 02 2015We generalize Meeks and Yau's embeddedness result on the solutions of the Plateau problem to the constant mean curvature disks. We show that any minimizing H-disk in an H_0-convex domain is embedded for any H in [0,H_0). In particular, for the unit ball ... More
Asymptotic Plateau Problem in H2xRApr 06 2016We give a fairly complete solution to the asymptotic Plateau Problem for area minimizing surfaces in H2xR. In particular, we identify the collection of Jordan curves in the asymptotic boundary of H2xR, which bounds an area minimizing surface in H2xR. ... More
Asymptotic Plateau Problem in H2xRApr 06 2016Jan 03 2018We give a fairly complete solution to the asymptotic Plateau Problem for area minimizing surfaces in H2xR. In particular, we identify the collection of Jordan curves in the asymptotic boundary of H2xR, which bounds an area minimizing surface in H2xR. ... More
Examples of Area Minimizing Surfaces in 3-manifoldsOct 16 2012In this paper, we give some examples of area minimizing surfaces to clarify some well-known features of these surfaces in more general settings. The first example is about Meeks-Yau's result on embeddedness of solution to the Plateau problem. We construct ... More
Least Area Planes in Hyperbolic 3-Space are Properly EmbeddedDec 05 2007We show that if P is an embedded least area (area minimizing) plane in hyperbolic 3-space whose asymptotic boundary is a simple closed curve with at least one smooth point, then P is properly embedded.
$H$-Surfaces with Arbitrary Topology in Hyperbolic 3-SpaceNov 19 2013In this paper, we show that any open orientable surface S can be properly embedded in H^3 as a minimizing H-surface for any 0<=H<1. We obtained this result by proving a version of the bridge principle at infinity for H-surfaces. We also show that any ... More
A Novel Quantum Cost Efficient Reversible Full Adder Gate in NanotechnologyAug 20 2010Reversible logic has become one of the promising research directions in low power dissipating circuit design in the past few years and has found its applications in low power CMOS design, cryptography, optical information processing and nanotechnology. ... More
Foliations of Hyperbolic Space by Constant Mean Curvature HypersurfacesSep 30 2009Sep 30 2009We show that the constant mean curvature hypersurfaces in the hyperbolic n-space spanning the boundary of a star shaped C^{1,1} domain in the asymptotic sphere give a foliation of the hyperbolic n-space. We also show that if C is a closed codimension-1 ... More
Asymptotic H-Plateau Problem in Hyperbolic 3-spaceMay 04 2015We show that if a Jordan curve C in the asymptotic sphere contains a smooth point, there is an embedded H-plane in H^3 asymptotic to C for any H in [0,1).
On the Number of Solutions to Asymptotic Plateau ProblemMay 26 2005Oct 02 2009We give a simple topological argument to show that the number of solutions of the asymptotic Plateau problem in hyperbolic space is generically unique. In particular, we show that the space of codimension-1 closed submanifolds of sphere at infinity, which ... More
Asymptotic Plateau ProblemJul 03 2009Apr 01 2010This is a survey of old and recent results about the asymptotic Plateau problem. Our aim is to give a fairly complete picture of the field, and present the current situation.
Generic Uniqueness of Area Minimizing Disks for Extreme CurvesOct 28 2008Jul 03 2009We show that for a generic nullhomotopic simple closed curve C in the boundary of a compact, orientable, mean convex 3-manifold M with trivial second homology, there is a unique area minimizing disk D embedded in M where the boundary of D is C. We also ... More
Minimizing Constant Mean Curvature Hypersurfaces in Hyperbolic SpaceAug 17 2005We study the constant mean curvature (CMC) hypersurfaces in hyperbolic space whose asymptotic boundaries are closed codimension-1 submanifolds in sphere at infinity. We consider CMC hypersurfaces as generalizations of minimal hypersurfaces. We naturally ... More
Nonuniqueness of the solutions to the asymptotic Plateau problemMar 27 2006Oct 02 2009Because of the relevance of the results, this paper is merged into the paper titled "On the Number of Solutions to Asymptotic Plateau Problem" (arXiv:math.DG/0505593) as a new section.
Minimal Surfaces in Hyperbolic 3-manifoldsJun 27 2018In this paper, we show the existence of smoothly embedded closed minimal surfaces in infinite volume hyperbolic $3$-manifolds except some special cases.
Mean Convex Hulls and Least Area Disks spanning Extreme CurvesDec 29 2004Jun 06 2005We show that for any extreme curve in a 3-manifold M, there exist a canonical mean convex hull containing all least area disks spanning the curve. Similar result is true for asymptotic case in hyperbolic 3-space such that for any asymptotic curve, there ... More
Inequalities of extended Beta and extended hypergeometric functionsNov 25 2016This paper studies the log-convexity of the extended beta functions. As a consequence, Tur\'an-type inequalities are established.The monotonicity, log-convexity, log-concavity of extended hypergeometric functions are deduced by using the inequalities ... More
On the geometric properties of the Bessel-Struve kernel functionJan 29 2016This paper introduce the Bessel-Struve kernel functions $\mathcal{B}_\nu$ defined on the unit disk in the complex plane. We studies the close-to-convexity of $\mathcal{B}_\nu$ with respect to several starlike functions. Sufficient condition on $\nu$ for ... More
Fabrication of nanometer-spaced electrodes using gold nanoparticlesNov 11 2002A simple and highly reproducible technique is demonstrated for the fabrication of metallic electrodes with nanometer separation. Commercially available bare gold colloidal nanoparticles are first trapped between prefabricated large-separation electrodes ... More
Reversible Logic Synthesis of Fault Tolerant Carry Skip BCD AdderAug 19 2010Reversible logic is emerging as an important research area having its application in diverse fields such as low power CMOS design, digital signal processing, cryptography, quantum computing and optical information processing. This paper presents a new ... More
Efros-Shklovskii variable range hopping in reduced graphene oxide sheets of varying carbon sp2 fractionOct 05 2012We investigate the low temperature electron transport properties of chemically reduced graphene oxide (RGO) sheets with different carbon sp2 fractions of 55 to 80 %. We show that in the low bias (Ohmic) regime, the temperature (T) dependent resistance ... More
Neutrino asymmetry generation in the early Universe (from active-sterile neutrino oscillations)May 15 2001Neutrino asymmetry generation from active-sterile neutrino oscillations in the early Universe has different important cosmological effects. We discuss its basic features and present recent results on the borders of the generation for mixing angles $\sin^2 ... More
Seiberg--Witten Maps to All OrdersDec 04 2007All order Seiberg--Witten maps of gauge parameter, gauge field and matter fields are given as a closed recursive formula. These maps are obtained by analyzing the order by order solutions of the gauge consistency and equivalence conditions as well as ... More
An introduction to leptogenesis and neutrino propertiesJun 14 2012This is an introductory review of the main features of leptogenesis, one of the most attractive models of baryogenesis for the explanation of the matter-antimatter asymmetry of the Universe. The calculation of the asymmetry in leptogenesis is intimately ... More
Seesaw geometry and leptogenesisFeb 09 2005Aug 22 2005The representation of the seesaw orthogonal matrix in the complex plane establishes a graphical correspondence between neutrino mass models and geometrical configurations, particularly useful to study relevant aspects of leptogenesis. We first derive ... More
Active-sterile neutrino oscillations in the early Universe and the atmospheric neutrino anomalyFeb 02 2000Cosmology cannot rule out the solution nu_mu <-> nu_s to the atmospheric neutrino data and thus only Earth experiments will be able to give a definitive answer. This conclusion holds when a generation of lepton number is taken into account and one assumes ... More
Entropy production in the Early Universe. A new mechanismAug 05 1997We expose briefly the role of entropy in the early universe and in particular the importance of searching for new mechanisms of entropy production. We describe a mechanism that shows how entropy is produced during early annihilations and under which conditions ... More
Separation of Signals Consisting of Amplitude and Instantaneous Frequency RRC Pulses Using SNR Uniform TrainingJan 30 2016This work presents sample mean and sample variance based features that distinguish continuous phase FSK from QAM and PSK modulations. Root raised cosine pulses are used for signal generation. Support vector machines are employed for signals separation. ... More
Developments in LeptogenesisFeb 16 2011Latest developments in leptogenesis are reviewed with a particular emphasis on the proposals to test leptogenesis. We discuss in particular the important role played by light and heavy flavour effects in the determination of the final asymmetry and the ... More
Update on neutrino mixing in the early UniverseAug 22 2001Oct 24 2001From the current cosmological observations of CMB and nuclear abundances we show, with an analytic procedure, that the total effective number of extra neutrino species $\Delta N_{\nu}^{\rm tot}< 0.3$. We also describe the possible signatures of non standard ... More
Amplification of Isocurvature Perturbations induced by Active-Sterile Neutrino OscillationsNov 03 1999We show how the generation of a lepton number in the Early Universe induced by active-sterile neutrino oscillations, in presence of small baryon number inhomogeneities, gives rise to the formation of lepton domains, regions with different values of active ... More
Neutrino masses, leptogenesis and dark matterApr 26 2019May 09 2019Despite the lack of evidence of new physics at colliders, neutrino masses, dark matter and matter-antimatter asymmetry of the universe require an extension of the Standard Model. After discussing some new concepts and tools in the description of seesaw ... More
Derived Ramanujan Primes : R'_{n}Oct 25 2012Oct 29 2012We study the Ramanujan-prime-counting function along the lines of Ramanujan's original work on Bertrand's Postulate. We show that the number of Ramanujan primes between x and 2x tends to infinity with x. This analysis leads us to define a new sequence ... More
Error-and-Erasure Decoding for Block Codes with FeedbackMar 25 2009Sep 01 2011Inner and outer bounds are derived on the optimal performance of fixed length block codes on discrete memoryless channels with feedback and errors-and-erasures decoding. First an inner bound is derived using a two phase encoding scheme with communication ... More
Uniqueness of Area Minimizing Surfaces for Extreme CurvesJul 19 2012Let M be a compact, orientable, mean convex 3-manifold with boundary. We show that the set of all simple closed curves in the boundary of M which bound unique area minimizing disks in M is dense in the space of simple closed curves in the boundary of ... More
Addendum to: Update on neutrino mixing in the early UniverseFeb 20 2003Mar 31 2003In the light of the recent WMAP results we update the constraints on a class of non standard BBN models with a simultaneous combination of non standard neutrino distributions and extra effective number of neutrinos in the expansion rate. These models ... More
The cosmological information on neutrino mixingNov 06 2001Cosmology provides interesting information on neutrino mixing models with sterile neutrinos. In this case non standard BBN effects can be relevant. We show how the recent measurement of the baryon content from the observations of CMB anisotropies together ... More
News on LeptogenesisNov 12 2002Nov 15 2002The possibility to explain the CMB measurement of the baryon asymmetry with leptogenesis results in a stringent bound on the neutrino masses such that [(m_1)^2+(m_2)^2+(m_3)^2]^(1/2) < 0.30 eV. We discuss the implications of such a bound for future experiments ... More
Signal reconstruction in diffusion-based molecular communicationJan 31 2019Feb 01 2019Molecular Communication (MC) is an important nanoscale communication paradigm, which is employed for the interconnection of the nanomachines (NMs) to form nanonetworks. A transmitter NM (TN) sends the information symbols by emitting molecules into the ... More
Area minimizing surfaces in mean convex 3-manifoldsJan 16 2012Jul 15 2012In this paper, we give several results on area minimizing surfaces in strictly mean convex 3-manifolds. First, we study the genus of absolutely area minimizing surfaces in a compact, orientable, strictly mean convex 3-manifold M bounded by a simple closed ... More
Heavy traffic analysis of open processing networks with complete resource pooling: asymptotic optimality of discrete review policiesMar 23 2005We consider a class of open stochastic processing networks, with feedback routing and overlapping server capabilities, in heavy traffic. The networks we consider satisfy the so-called complete resource pooling condition and therefore have one-dimensional ... More
Leptogenesis, neutrino mixing data and the absolute neutrino mass scaleJun 10 2004Recent developments in thermal leptogenesis are reviewed. Neutrino mixing data favor a simple picture where the matter-anti matter asymmetry is generated by the decays of the heavy RH neutrinos mildly close to thermal equilibrium and, remarkably, in the ... More
On optimality gaps in the Halfin--Whitt regimeMar 08 2012We consider optimal control of a multi-class queue in the Halfin--Whitt regime, and revisit the notion of asymptotic optimality and the associated optimality gaps. The existing results in the literature for such systems provide asymptotically optimal ... More
Some results on counting roots of polynomials and the Sylvester resultantSep 27 2016We present two results, the first on the distribution of the roots of a polynomial over the ring of integers modulo $n$ and the second on the distribution of the roots of the Sylvester resultant of two multivariate polynomials. The second result has application ... More
Neutrino masses, leptogenesis and dark matterApr 26 2019Despite the lack of evidence of new physics at colliders, neutrino masses, dark matter and matter-antimatter asymmetry of the universe require an extension of the Standard Model. After discussing some new concepts and tools in the description of seesaw ... More
Absence of Relativistic Stars in f(T) GravityMar 11 2011Sep 10 2015In this work we investigate the structure of neutron stars in modified f(T) gravity models. We find that, unlike the f(R) models, the equations of motion put a rather strict constraint on the possible f(T) functions. Specifically, after analyzing the ... More
Orbifold Lens Spaces that are Isospectral but not IsometricFeb 14 2009Aug 28 2009We answer Mark Kacs famous question - can one hear the shape of a drum - in the negative for orbifolds that are spherical space forms. This is done by extending the techniques developed by A. Ikeda on Lens Spaces to the orbifold setting. Several results ... More
On Convexification of Range Measurement Based Sensor and Source Localization ProblemsOct 25 2013This manuscript is a preliminary pre-print version of a journal submission by the authors, revisiting the problem of range measurement based localization of a signal source or a sensor. The major geometric difficulty of the problem comes from the non-convex ... More
On the subclasses associated with the Bessel-Struve kernel functionsJan 26 2016The article investigate the necessary and sufficient conditions for the normalized Bessel-struve kernel functions belonging to the classes $\mathcal{T}_\lambda(\alpha)$ , $\mathcal{L}_\lambda(\alpha)$. Some linear operators involving the Bessel-Struve ... More
A Miniature-Based Image Retrieval SystemAug 19 2010Due to the rapid development of World Wide Web (WWW) and imaging technology, more and more images are available in the Internet and stored in databases. Searching the related images by the querying image is becoming tedious and difficult. Most of the ... More
One some differential subordination involving the Bessel-Struve kernel functionJan 28 2016In this article we study the inclusion properties of the Bessel-Struve kernel functions in the Janowski class. In particular, we find the conditions for which the Bessel-Struve kernel functions maps the unit disk to right half plane. An open problem in ... More
A Distributed Framework for Scalable Search over Encrypted DocumentsAug 24 2014Nowadays, huge amount of documents are increasingly transferred to the remote servers due to the appealing features of cloud computing. On the other hand, privacy and security of the sensitive information in untrusted cloud environment is a big concern. ... More
An Architecture of Active Learning SVMs with Relevance Feedback for Classifying E-mailAug 27 2010In this paper, we have proposed an architecture of active learning SVMs with relevance feedback (RF)for classifying e-mail. This architecture combines both active learning strategies where instead of using a randomly selected training set, the learner ... More
Inequalities for the modified k-Bessel functionFeb 17 2017The article considers the generalized k-Bessel functions and represents it as Wright functions. Then we study the monotonicity properties of the ratio of two different orders k- Bessel functions, and the ratio of the k-Bessel and the m-Bessel functions. ... More
On Solution of fractional kinetic equation Involving $\mathtt{k}$-Struve functionNov 28 2016In this present investigation, we give the solution of the fractional kinetic equations involving $\mathtt{k}$-Struve function. The obtained results are general in nature and it is useful to investigate many problems in mathematical physics.
Coulomb Blockade and Hopping Conduction in Graphene Quantum Dots ArrayOct 26 2010Feb 03 2011We show that the low temperature electron transport properties of chemically functionalized graphene can be explained as sequential tunneling of charges through a two dimensional array of graphene quantum dots (GQD). Below 15 K, a total suppression of ... More
Ultra-high density alignment of carbon nanotubes array by dielectrophoresisJan 11 2011We report ultra-high density assembly of aligned single walled carbon nanotubes (SWNTs) two dimensional arrays via ac dielectrophoresis using high quality surfactant free and stable SWNT solutions. After optimization of frequency and trapping time, we ... More
Huge Volume Expansion and Structural Transformation of Carbon Nanotube Aligned Arrays during Electrical Breakdown in VacuumJul 09 2011We observed a huge volume expansion of aligned single walled carbon nanotube (SWNT) arrays accompanied by structural transformation during electrical breakdown in vacuum. The SWNT arrays were assembled between prefabricated Pd source and drain electrodes ... More
Pathway fractional integral operators involving $\mathtt{k}$-Struve functionNov 28 2016A new generalization called $\mathtt{k}$-Struve function and its properties given by Nisar and saiful very recently. In this paper, we establish the pathway fractional integral representation of $\mathtt{k}$-Struve function. Many special cases also established ... More
Recent progress in parallel fabrication of individual single walled carbon nanotube devicesMay 03 2014Single walled carbon nanotubes (SWNTs) have attracted immense research interest because of their remarkable physical and electronic properties. In particular, electronic devices fabricated using individual SWNT have shown outstanding device performance ... More
Marichev-Saigo-Maeda fractional integration operators of generalized Bessel functionsMay 07 2013Two integral operator involving the Appell's functions, or Horn's function in the kernel are considered. Composition of such functions with generalized Bessel functions of the first kind are expressed in term of generalized Wright function and generalized ... More
Inclusion of generalized Bessel functions in the Janowski classJun 09 2015Sufficient conditions on $A$, $B$, $p$, $b$ and $c$ are determined that will ensure the generalized Bessel functions ${u}_{p,b,c}$ satisfies the subordination ${u}_{p,b,c}(z) \prec (1+Az)/ (1+Bz)$. In particular this gives conditions for $(-4\kappa/c)({u}_{p,b,c}(z)-1)$, ... More
SO(10)-inspired solution to the problem of the initial conditions in leptogenesisAug 05 2013Nov 14 2013We show that, within SO(10)-inspired leptogenesis, there exists a solution, with definite constraints on low energy neutrino parameters, able simultaneously to reproduce the observed baryon asymmetry and to satisfy the conditions for the independence ... More
Flavor effects on leptogenesis predictionsJul 31 2006Mar 17 2007Flavor effects in leptogenesis reduce the region of the see-saw parameter space where the final predictions do not depend on the initial conditions, the strong wash-out regime. In this case we show that the lowest bounds holding on the lightest right-handed ... More
Active-Sterile neutrino oscillations and BBN+CMBR constraintsAug 24 2000Nov 13 2000We show how active-sterile neutrino oscillations in the early Universe can play an interesting role in explaining the current observations of CMBR anisotropies and light element abundances. We describe different possible phenomenological scenarios in ... More
Validity of the third law of thermodynamics for the Tsallis entropyFeb 23 2016Bento \textit{et al.} [Phys. Rev. E 91, 022105 (2015)] recently stated that the Tsallis entropy violates the third law of thermodynamics for $0 < q <1$ in the sub-additive regime. We first show that the division between the regimes $q < 1$ and $q > 1$ ... More
Comment on "Third Law of thermodynamics as a key test of generalized entropies"Jul 14 2015Bento \textit{et al.} [Phys. Rev. E 91, 022105 (2015)] state that the Tsallis entropy violates the third law of thermodynamics for $q \leq 0$ and $0<q<1$. We show that their results are valid only for $q \geq 1$, since there is no distribution maximizing ... More
Successful type I Leptogenesis with SO(10)-inspired mass relationsSep 15 2008It is well-known that thermal leptogenesis through the decays of the lightest right-handed neutrinos encounters serious difficulties when SO(10)-inspired mass conditions are imposed on the Dirac neutrino mass matrix and light neutrino masses are generated ... More
Active-sterile neutrino oscillations in the early Universe: asymmetry generation at low |delta m^2| and the Landau-Zener approximationMar 19 2001Dec 15 2001It is well established that active-sterile neutrino oscillations generate large neutrino asymmetries for very small mixing angles ($\sin^2 2\theta_0\lesssim 10^{-4}$), negative values of $\delta m^2$ and provided that $|\delta m^2|\gtrsim 10^{-4} {\rm ... More
On the sign of the neutrino asymmetry induced by active-sterile neutrino oscillations in the early UniverseDec 01 1999Jan 31 2000We deal with the problem of the final sign of the neutrino asymmetry generated by active-sterile neutrino oscillations in the Early Universe solving the full momentum dependent quantum kinetic equations. We study the parameter region $10^{-2} \stackrel{<}{\sim} ... More
The minimal scenario of leptogenesisNov 02 2012We review the main features and results of thermal leptogenesis within the type I seesaw mechanism, the minimal extension of the Standard Model explaining neutrino masses and mixing. After presenting the simplest approach, the vanilla scenario, we discuss ... More
Rényi entropy yields artificial biases not in the data and incorrect updating due to the finite-size dataNov 02 2018We show that the R\'enyi entropy implies artificial biases not warranted by the data and incorrect updating information due to the finite-size of the data despite being additive. It is demonstrated that this is so because it does not conform to the system ... More
Gaussian-state quantum-illumination receivers for target detectionNov 04 2009The signal half of an entangled twin-beam, generated using spontaneous parametric downconversion, interrogates a region of space that is suspected of containing a target, and has high loss and high (entanglement-breaking) background noise. A joint measurement ... More
On the challenges of data provenance in the Internet of ThingsJul 17 2019The IoT is described as a smart interactive environment where devices communicate together ubiquitously sometimes in the background, performing functions on behalf of the users and offering many advanced services to them. Examples range from simple smart ... More
Flavor effects in thermal leptogenesisFeb 08 2007We review recent developments in leptogenesis on flavor effects. Their account discloses an important connection between the matter-antimatter asymmetry of the Universe and CP violation at low energies. Besides, they modify the upper bound on the neutrino ... More
Testing SO(10)-inspired leptogenesis with low energy neutrino experimentsDec 10 2010Apr 12 2011We extend the results of a previous analysis of ours showing that, when both heavy and light flavour effects are taken into account, successful minimal (type I + thermal) leptogenesis with SO(10)-inspired relations is possible. Barring fine tuned choices ... More
Leptogenesis beyond the limit of hierarchical heavy neutrino massesMar 15 2006Jun 02 2006We calculate the baryon asymmetry of the Universe in thermal leptogenesis beyond the usual lightest right-handed (RH) neutrino dominated scenario (N_1DS) and in particular beyond the hierarchical limit (HL), M_1 << M_2 << M_3, for the RH neutrino mass ... More
New aspects of leptogenesis boundsJul 07 2008Oct 16 2008We present a general analysis that reveals new aspects of the leptogenesis bounds on neutrino masses and on the reheat temperature of the Universe. After revisiting a known effect coming from an unbounded term in the total CP asymmetry, we show that an ... More
Common fixed points for three or four mappings via common fixed point for two mappingsFeb 15 2013In this paper, we shall show that some coincidence point and common fixed point results for three or four mappings could easily be obtained from the corresponding fixed point results for two mappings.
Finsler Geometric Local Indicator of Chaos for single orbits in the Henon-Heiles hamiltonianJul 09 1998Translating the dynamics of the Henon--Heiles hamiltonian as a geodesic flow on a Finsler manifold, we obtain a local and synthetic Geometric Indicator of Chaos (GIC) for two degrees of freedom continuous dynamical systems. It represents a link between ... More
The (In)stability of Bianchi IX Dynamics: Geodesic Deviation Equations in Finsler SpacesJul 09 1998We explore the dynamical stability of the minisuperspace Hamiltonian of the Bianchi IX cosmological models, giving a gauge-invariant and unapproximated description of the full continuous dynamics, achieved through a geometrical description of the equations ... More
Cold Dark Matter from heavy Right-Handed neutrino mixingDec 30 2008Nov 04 2009We show that, within the see-saw mechanism, an almost decoupled RH neutrino species N_DM with mass M_DM \gtrsim 100 GeV can play the role of Dark Matter (DM). The N_DM's can be produced from non-adiabatic conversions of thermalized (source) RH neutrinos ... More
The Effect of Carbon Nanotube/Organic Semiconductor Interfacial Area on the Performance of Organic TransistorsOct 05 2012We show that the performance of pentacene transistors can be significantly improved by maximizing the interfacial area at single walled carbon nanotube (SWCNT)/pentacene. The interfacial areas are varied by anchoring short SWCNTs of different densities ... More
Statistical Analysis on Bangla Newspaper Data to Extract Trending Topic and Visualize Its Change Over TimeJan 27 2017Trending topic of newspapers is an indicator to understand the situation of a country and also a way to evaluate the particular newspaper. This paper represents a model describing few techniques to select trending topics from Bangla Newspaper. Topics ... More
Solution processed large area field effect transistors from dielectrophoreticly aligned arrays of carbon nanotubesDec 28 2008Apr 20 2009We demonstrate solution processable large area field effect transistors (FETs) from aligned arrays of carbon nanotubes (CNTs). Commercially available, surfactant free CNTs suspended in aqueous solution were aligned between source and drain electrodes ... More
Diffusion mediated photoconduction in multi-walled carbon nanotube filmsApr 28 2009We investigated the mechanism for photoconduction in multi-walled carbon nanotube (MWNT) film of various electrode separations upon near infrared illumination. In addition to observing strong dependence of photocurrent on the position of the laser spot, ... More
The importance of anisotropic Coulomb interactions and exchange to the band gap and antiferromagnetism of β-MnO2 from DFT+UNov 23 2012First principles density functional theory (DFT) is used to investigate the electronic structure of \beta-MnO2. From collinear spin polarized calculations we find that DFT+U_Eff predicts a gapless ferromagnet in contrast with experiment which indicates ... More
Quantum Cost Efficient Reversible BCD Adder for Nanotechnology Based SystemsDec 04 2011Reversible logic allows low power dissipating circuit design and founds its application in cryptography, digital signal processing, quantum and optical information processing. This paper presents a novel quantum cost efficient reversible BCD adder for ... More
Certain inequalities involving the k-Struve functionNov 28 2016We aim to introduce a $\mathtt{k}$-Struve function and investigate its various properties, including mainly certain inequalities associated this function. One of the inequalities given here is pointed out to be related to the so-called classical Tur\'an ... More
On Solution of fractional kinetic equation Involving k-Struve functionNov 28 2016Dec 18 2016In the present research article, we investigate solutions for fractional kinetic equations, involving $\mathtt{k}$-Struve functions, some of the salient properties of which we present. The method used is Laplace transform based. the methodology and results ... More
Machine Learning Approaches for Modeling Spammer BehaviorAug 25 2010Spam is commonly known as unsolicited or unwanted email messages in the Internet causing potential threat to Internet Security. Users spend a valuable amount of time deleting spam emails. More importantly, ever increasing spam emails occupy server storage ... More
High Performance Semiconducting Enriched Carbon Nanotube Thin Film Transistors Using Metallic Carbon Nanotube ElectrodeDec 25 2013High-performance solution-processed short-channel carbon nanotube (CNT) thin film transistors (TFTs) are fabricated using densely aligned arrays of metallic CNTs (m-CNTs) as source and drain electrodes, and aligned arrays of semiconducting enriched CNTs ... More
Near-infrared photoresponse in single walled carbon nanotube/polymer composite filmsDec 21 2009Dec 31 2009We present a near-infrared photoresponse study of single-walled carbon nanotube/poly(3-hexylthiophene)-block-polystyrene polymer (SWCNT/P3HT-b-PS) composite films for different loading ratios of SWCNT in the polymer matrix. Compared to the pure SWCNT ... More