Results for "Tina Arh"

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$k$-reflexivity defect of the image of a generalized derivationJan 28 2014Let $\mathcal{X}$ be a finite-dimensional complex vector space and let k be a positive integer. An explicit formula for the k-reflexivity defect of the image of a generalized derivation on $L(\mathcal{X})$, the space of all linear transformations on $\mathcal{X}$, ... More
Entropic convergence and the linearized limit for the Boltzmann equation with external forceDec 15 2016The purpose of this note, as a compendium, is to extend the results on entropic convergence and the linearized limit for the Boltzmann equation (without external force) in \cite{Levermore} by Levermore to the case of the Boltzmann equation with external ... More
Cesium bright matter-wave solitons and soliton trainsFeb 08 2019A setup for studying bright matter-wave solitons of a cesium Bose-Einstein condensate (BEC) is presented. Production of a single soliton is demonstrated and dependence of soliton atom number on the interatomic interaction is studied. Formation of soliton ... More
Cesium bright matter-wave solitons and soliton trainsFeb 08 2019Mar 05 2019A study of bright matter-wave solitons of a cesium Bose-Einstein condensate (BEC) is presented. Production of a single soliton is demonstrated and dependence of soliton atom number on the interatomic interaction is investigated. Formation of soliton trains ... More
Stochastic calculus for convoluted Lévy processesMay 14 2008We develop a stochastic calculus for processes which are built by convoluting a pure jump, zero expectation L\'{e}vy process with a Volterra-type kernel. This class of processes contains, for example, fractional L\'{e}vy processes as studied by Marquardt ... More
Polarized Gravitational Waves from Cosmological Phase TransitionsMay 13 2015Jul 23 2015We estimate the degree of circular polarization for the gravitational waves generated during the electroweak and QCD phase transitions from the kinetic and magnetic helicity generated by bubble collisions during those cosmological phase transitions.
CMB anisotropies caused by gravitational waves: A parameter studyFeb 26 1997May 26 1998Anisotropies in the cosmic microwave background radiation due to gravity waves are investigated. An initial spectrum of gravity waves may have been induced during an epoch of inflation. We study the propagation of such a spectrum in a Friedmann background ... More
Quasi-coherent Hecke category and Demazure DescentMay 20 2014Oct 26 2015Let G be a reductive algebraic group with a Borel subgroup B. We define the quasi-coherent Hecke category for the pair (G,B). For any regular Noetherian G-scheme X we construct a monoidal action of the Hecke category on the derived category of B-equivariant ... More
Demazure descent and representations of reductive groupsMar 15 2013Oct 26 2015We introduce the notion of Demazure descent data on a triangulated category C and define the descent category for such data. We illustrate the definition by our basic example. Let G be a reductive algebraic group with a Borel subgroup B. Demazure functors ... More
Equivariant Matrix Factorizations and Hamiltonian reductionOct 26 2015Let $X$ be a smooth scheme with an action of an algebraic group $G$. We establish an equivalence of two categories related to the corresponding moment map $\mu : T^*X \to Lie(G)^*$ - the derived category of G-equivariant coherent sheaves on the derived ... More
Braid group actions on matrix factorizationsOct 26 2015Let $X$ be a smooth scheme with an action of a reductive algebraic group $G$ over an algebraically closed field $k$ of characteristic zero. We construct an action of the extended affine Braid group on the $G$-equivariant absolute derived category of matrix ... More
Summertime, and the livin is easy: Winter and summer pseudoseasonal life expectancy in the United StatesMar 10 2017In temperate climates, mortality is seasonal with a winter-dominant pattern, due in part to pneumonia and influenza. Cardiac causes, which are the leading cause of death in the United States, are also winter-seasonal although it is not clear why. Interactions ... More
Feasibility of observing Hanbury Brown and Twiss phaseNov 10 2014The interferometers of Hanbury Brown and collaborators in the 1950s and 60s, and their modern descendants now being developed (intensity interferometers) measure the spatial power spectrum of the source from intensity correlations at two points. The quantum ... More
On the Detection of Magnetic HelicityNov 14 2005Feb 16 2006Magnetic fields in various astrophysical settings may be helical and, in the cosmological context, may provide a measure of primordial CP violation during baryogenesis. Yet it is difficult, even in principle, to devise a scheme by which magnetic helicity ... More
CMB two- and three-point correlation functions from Alfvén wavesOct 21 2010Sep 28 2012We study the cosmic microwave background (CMB) temperature fluctuations non-gaussianity due to the vector mode perturbations (Alfv\'en waves) supported by a stochastic cosmological magnetic field. We present detailed derivations of the statistical properties, ... More
The Signature of Proper Motion in the Microwave SkyJul 26 2010The cosmic microwave background radiation defines a preferred cosmic rest frame, and inflationary cosmological theories predict that the microwave background temperature fluctuations should be statistically isotropic in this rest frame. For observers ... More
Weighted domination number of cactus graphsApr 21 2016In the paper, we write a linear algorithm for calculating the weighted domination number of a vertex-weighted cactus. The algorithm is based on the well known depth first search (DFS) structure. Our algorithm needs less than $12n+5b$ additions and $9n+2b$ ... More
Supramolecular structures in monohydroxy alcohols: Insights from shear-mechanical studies of a systematic series of octanol structural isomersJun 10 2014Sep 11 2014A recent study [Gainaru et al. PRL., 112, 098301 (2014)] of two supercooled monohydroxy alcohols close to the glass-transition temperature showed that the Debye peak, thus far mainly observed in the electrical response, also has a mechanical signature. ... More
Classical zero-knowledge arguments for quantum computationsFeb 14 2019We show that every language in BQP admits a classical-verifier, quantum-prover zero-knowledge argument system which is sound against quantum polynomial-time provers and zero-knowledge for classical (and quantum) polynomial-time verifiers. The protocol ... More
Estimating the efficiency turn-on curve for a constant-threshold trigger without a calibration datasetJan 30 2019Many particle physics experiments use constant threshold triggers, where the trigger threshold is in an online estimator that can be calculated quickly by the trigger module. Offline data analysis then calculates a more precise offline estimator for the ... More
Classes of hydrodynamic and magnetohydrodynamic turbulent decayJul 04 2016We perform numerical simulations of decaying hydrodynamic and magnetohydrodynamic turbulence. We classify our time-dependent solutions by their evolutionary tracks in parametric plots between instantaneous scaling exponents. We find distinct classes of ... More
Classes of hydrodynamic and magnetohydrodynamic turbulent decayJul 04 2016Nov 03 2016We perform numerical simulations of decaying hydrodynamic and magnetohydrodynamic turbulence. We classify our time-dependent solutions by their evolutionary tracks in parametric plots between instantaneous scaling exponents. We find distinct classes of ... More
Real Forms of the Complex Neumann System: Real Roots of Polynomial $U_{\cal S}(λ)$May 22 2018The topology of Liouville sets of the real forms of the complex generic Neumann system depends indirectly on the roots of the special polynomial $U_{\cal S}(\lambda)$. For certain polynomials, the existence and positions of the real roots, according to ... More
Classical zero-knowledge arguments for quantum computationsFeb 14 2019Apr 09 2019We show that every language in BQP admits a classical-verifier, quantum-prover zero-knowledge argument system which is sound against quantum polynomial-time provers and zero-knowledge for classical (and quantum) polynomial-time verifiers. The protocol ... More
Analysis of Quantum Particle Automata for Solving the Density Classification ProblemJan 16 2015To advance our understanding of Quantum Cellular Automata in problem solving through parallel and distributed computing, this research quantized the density classification problem and adopted the Quantum Particle Automata (QPA) to solve the quantized ... More
Combining collective, MSW, and turbulence effects in supernova neutrino flavor evolutionApr 23 2013(Abridged) In order to decode the neutrino burst signal from a Galactic core-collapse supernova and reveal the complicated inner workings of the explosion we need a thorough understanding of the neutrino flavor evolution from the proto-neutron star outwards. ... More
On the Relation of the Deconfinement and the Chiral Phase Transition in Gauge Theories with Fundamental and Adjoint MatterMay 03 2012We study the relation of confinement and chiral symmetry breaking in gauge theories with non-trivial center, such as SU(N) gauge theories. To this end, we deform these gauge theories by introducing an additional control parameter into the theory and by ... More
Evolutionarily Stable Sets in Quantum Penny Flip GamesNov 30 2012In game theory, an Evolutionarily Stable Set (ES set) is a set of Nash Equilibrium (NE) strategies that give the same payoffs. Similar to an Evolutionarily Stable Strategy (ES strategy), an ES set is also a strict NE. This work investigates the evolutionary ... More
Nonhelical inverse transfer of a decaying turbulent magnetic fieldApr 08 2014Nov 28 2014In the presence of magnetic helicity, inverse transfer from small to large scales is well known in magnetohydrodynamic (MHD) turbulence and has applications in astrophysics, cosmology, and fusion plasmas. Using high resolution direct numerical simulations ... More
The Cosmic Microwave Background and Helical Magnetic Fields: the tensor modeApr 30 2003Nov 17 2004We study the effect of a possible helicity component of a primordial magnetic field on the tensor part of the cosmic microwave background temperature anisotropies and polarization. We give analytical approximations for the tensor contributions induced ... More
Microwave Background Anisotropies from Alfven wavesJul 09 1998We investigate microwave background anisotropies in the presence of primordial magnetic fields. We show that a homogeneous field with fixed direction can amplify vector perturbations. We calculate the correlations of $\delta T/T$ explicitly and show that ... More
Entanglement of Quasielastic Scattering and Pion ProductionJul 19 2011Jul 21 2011The extraction of neutrino oscillation parameters requires the determination of the neutrino energy from observations of the hadronic final state. Here we discuss the difficulties connected with this energy reconstruction for the ongoing experiments MiniBooNE ... More
Halpha emission-line stars in molecular clouds. II. The M42 regionJun 26 2014Nov 22 2014We present a deep survey of Halpha emission-line stars in the M42 region using wide-field objective prism films. A total of 1699 Halpha emission-line stars were identified, of which 1025 were previously unknown, within an area of 5.5 x 5.5 degrees centred ... More
Simple High-Bandwidth Sideband Locking with Heterodyne ReadoutOct 05 2016We present a robust sideband laser locking technique that is ideally suited for applications requiring low probe power and heterodyne readout. By feeding back to a high-bandwidth voltage controlled oscillator, we lock a first-order phase-modulation sideband ... More
A Trichotomy for Regular Trail QueriesMar 01 2019Regular path queries (RPQs) are an essential component of graph query languages. Such queries consider a regular expression r and a directed edge-labeled graph G and search for paths in G for which the sequence of labels is in the language of r. In order ... More
Linear Convergence of Stochastic Iterative Greedy Algorithms with Sparse ConstraintsJul 01 2014Motivated by recent work on stochastic gradient descent methods, we develop two stochastic variants of greedy algorithms for possibly non-convex optimization problems with sparsity constraints. We prove linear convergence in expectation to the solution ... More
A brief critique of the Adam-Gibbs entropy modelJan 14 2009This paper critically reviews the entropy model proposed by Adam and Gibbs in 1965 for explaining the dramatic temperature dependence of glass-forming liquids' average relaxation time, one of the most influential models during the last three decades. ... More
Microwave Background Signatures of a Primordial Stochastic Magnetic FieldMay 29 2001Apr 09 2002A stochastic magnetic field in the early Universe will produce anisotropies in the temperature and polarization of the cosmic microwave background. We derive analytic expressions for the microwave background temperature and polarization power spectra ... More
Gravitational Radiation Generated by Cosmological Phase Transition Magnetic FieldsMay 05 2009Aug 20 2009We study gravitational waves generated by the cosmological magnetic fields induced via bubble collisions during the electroweak (EW) and QCD phase transitions. The magnetic field generation mechanisms considered here are based on the use of the fundamental ... More
Shirtless and Dangerous: Quantifying Linguistic Signals of Gender Bias in an Online Fiction Writing CommunityMar 29 2016Imagine a princess asleep in a castle, waiting for her prince to slay the dragon and rescue her. Tales like the famous Sleeping Beauty clearly divide up gender roles. But what about more modern stories, borne of a generation increasingly aware of social ... More
Knowledge Representation Issues in Semantic Graphs for Relationship DetectionApr 14 2005An important task for Homeland Security is the prediction of threat vulnerabilities, such as through the detection of relationships between seemingly disjoint entities. A structure used for this task is a "semantic graph", also known as a "relational ... More
Simulation-based model selection for dynamical systems in systems and population biologyNov 09 2009Jan 20 2010Computer simulations have become an important tool across the biomedical sciences and beyond. For many important problems several different models or hypotheses exist and choosing which one best describes reality or observed data is not straightforward. ... More
Parameter inference and model selection in signaling pathway modelsMay 27 2009To support and guide an extensive experimental research into systems biology of signaling pathways, increasingly more mechanistic models are being developed with hopes of gaining further insight into biological processes. In order to analyse these models, ... More
Doctoral Consortium - Australasian Conference on Information Systems (ACIS) 2015Jun 11 2016Jun 14 2016This submission contains all publications from the ACIS 2015 Doctoral Consortium held in Adelaide, Australia from November 30 - December 1, 2015.
Extra dimensions and Lorentz invariance violationApr 03 2007Nov 13 2007We consider effective model where photons interact with scalar field corresponding to conformal excitations of the internal space (geometrical moduli/gravexcitons). We demonstrate that this interaction results in a modified dispersion relation for photons, ... More
Generating Steganographic Text with LSTMsMay 30 2017Motivated by concerns for user privacy, we design a steganographic system ("stegosystem") that enables two users to exchange encrypted messages without an adversary detecting that such an exchange is taking place. We propose a new linguistic stegosystem ... More
Testing Lorentz Invariance Violation with WMAP Five Year DataJul 16 2008Dec 09 2008We consider different renormalizable models of Lorentz invariance violation. We show that the limits on birefringence of the propagation of cosmic microwave background photons from the five year data of the Wilkinson microwave anisotropy probe (WMAP) ... More
CMB Temperature Anisotropy from Broken Spatial Isotropy due to an Homogeneous Cosmological Magnetic FieldJul 26 2008Sep 09 2008We derive the cosmic microwave background temperature anisotropy two-point correlation function (including off-diagonal correlations) from broken spatial isotropy due to an arbitrarily oriented homogeneous cosmological magnetic field.
Scintillation of thin tetraphenyl butadiene films under alpha particle excitationNov 03 2010The alpha induced scintillation of the wavelength shifter 1,1,4,4-tetraphenyl-1,3-butadiene (TPB) was studied to improve the understanding of possible surface alpha backgrounds in the DEAP dark matter search experiment. We found that vacuum deposited ... More
Enhanced Optomechanical Levitation of Minimally Supported DielectricsDec 24 2014Apr 30 2015Optically levitated mechanical sensors promise isolation from thermal noise far beyond what is possible using flexible materials alone. One way to access this potential is to apply a strong optical trap to a minimally supported mechanical element, thereby ... More
A categorical approach to loops, neardomains and nearfieldsJul 16 2012In this paper we study loops, neardomains and nearfields from a categorical point of view. By choosing the right kind of morphisms, we can show that the category of neardomains is equivalent to the category of sharply 2-transitive groups. The other categories ... More
Generalized multiscale finite element method for a strain-limiting nonlinear elasticity modelDec 21 2018In this paper, we consider multiscale methods for nonlinear elasticity. In particular, we investigate the Generalized Multiscale Finite Element Method (GMsFEM) for a strain-limiting elasticity problem. Being a special case of the naturally implicit constitutive ... More
Weighted $\ell_1$-Minimization for Sparse Recovery under Arbitrary Prior InformationJun 03 2016Weighted $\ell_1$-minimization has been studied as a technique for the reconstruction of a sparse signal from compressively sampled measurements when prior information about the signal, in the form of a support estimate, is available. In this work, we ... More
Tutorial on ABC rejection and ABC SMC for parameter estimation and model selectionOct 23 2009Jan 19 2010In this tutorial we schematically illustrate four algorithms: (1) ABC rejection for parameter estimation (2) ABC SMC for parameter estimation (3) ABC rejection for model selection on the joint space (4) ABC SMC for model selection on the joint space.
The evolution of primordial magnetic field since its generationJul 02 2015Oct 10 2016We study the evolution of primordial magnetic fields in an expanding cosmic plasma. For this purpose we present a comprehensive theoretical model to consider the evolution of MHD turbulence that can be used over a wide range of physical conditions, including ... More
Extended pipeline for content-based feature engineering in music genre recognitionMay 12 2018We present a feature engineering pipeline for the construction of musical signal characteristics, to be used for the design of a supervised model for musical genre identification. The key idea is to extend the traditional two-step process of extraction ... More
An Analysis of Optimal Link BombsMar 07 2011We analyze the phenomenon of collusion for the purpose of boosting the pagerank of a node in an interlinked environment. We investigate the optimal attack pattern for a group of nodes (attackers) attempting to improve the ranking of a specific node (the ... More
Evolution of Primordial Magnetic Fields from Phase TransitionsDec 04 2012Apr 11 2013We consider the evolution of primordial magnetic fields generated during cosmological, electroweak or QCD, phase transitions. We assume that the magnetic field generation can be described as an injection of magnetic energy to cosmological plasma at a ... More
Growth Rate in the Dynamical Dark Energy ModelsJun 02 2014Aug 28 2014Dark Energy models with slowly-rolling cosmological scalar field provide a popular alternative to the standard, time-independent cosmological constant model. We study simultaneous evolution of background expansion and growth in the scalar field model ... More
Graph Distance from the Topological View of Non-backtracking CyclesJul 20 2018Whether comparing networks to each other or to random expectation, measuring dissimilarity is essential to understanding the complex phenomena under study. However, determining the structural dissimilarity between networks is an ill-defined problem, as ... More
Star Formation in the Gulf of MexicoJan 24 2011Feb 02 2011We present an optical/infrared study of the dense molecular cloud, L935, dubbed "The Gulf of Mexico", which separates the North America and the Pelican nebulae, and we demonstrate that this area is a very active star forming region. A wide-field imaging ... More
CMB Signatures of a Primordial Magnetic FieldNov 03 2000A primordial stochastic magnetic field will induce temperature and polarization fluctuations in the cosmic microwave background. We outline a calculation of the resulting fluctuation power spectra and present numerical results.
Mathematical model of galactose regulation and metabolic consumption in yeastFeb 11 2016The galactose network is a complex system responsible for galactose metabolism. It has been extensively studied experimentally and mathematically at the unicellular level to broaden our understanding of its regulatory mechanisms at higher order species. ... More
Ultralow-Noise SiN Trampoline Resonators for Sensing and OptomechanicsNov 05 2015Feb 11 2016In force sensing, optomechanics, and quantum motion experiments, it is typically advantageous to create lightweight, compliant mechanical elements with the lowest possible force noise. Here we report the fabrication and characterization of high-aspect-ratio, ... More
The effects of baryon physics, black holes and AGN feedback on the mass distribution in clusters of galaxiesDec 13 2011Apr 12 2012The spatial distribution of matter in clusters of galaxies is mainly determined by the dominant dark matter component, however, physical processes involving baryonic matter are able to modify it significantly. We analyse a set of 500 pc resolution cosmological ... More
Approximating the Minimum $k$-Section Width in Bounded-Degree Trees with Linear DiameterAug 21 2017Minimum $k$-Section denotes the NP-hard problem to partition the vertex set of a graph into $k$ sets of sizes as equal as possible while minimizing the cut width, which is the number of edges between these sets. When $k$ is an input parameter and $n$ ... More
Magnetic Fields from QCD Phase TransitionsJul 03 2012Sep 16 2012We study the evolution of QCD phase transition-generated magnetic fields in freely decaying MHD turbulence of the expanding Universe. We consider a magnetic field generation model that starts from basic non-perturbative QCD theory and predicts stochastic ... More
Confinement order parameters and fluctuationsOct 13 2015We study order parameters for the confinement-deconfinement phase transition related to the Polyakov-loop variable. The functional renormalisation group is used to compute these order parameters in a unified, non-perturbative continuum approach. Our result ... More
Optically Defined Mechanical GeometryNov 19 2015Sep 26 2016In the field of optomechanics, radiation forces have provided a particularly high level of control over the frequency and dissipation of mechanical elements. Here we propose a class of optomechanical systems in which light exerts a similarly profound ... More
MaxOutProbe: An Algorithm for Increasing the Size of Partially Observed NetworksNov 20 2015Networked representations of real-world phenomena are often partially observed, which lead to incomplete networks. Analysis of such incomplete networks can lead to skewed results. We examine the following problem: given an incomplete network, which $b$ ... More
The Impact of Fluctuations on QCD MatterFeb 03 2012We study the effect of quantum and thermal fluctuations as well as the mass dependence of the phase structure of QCD at finite temperature and density within a dynamical Polyakov-loop--extended quark-meson model. The glue dynamics is simulated by the ... More
Computational Intelligence for Deepwater Reservoir Depositional Environments InterpretationJan 12 2013Predicting oil recovery efficiency of a deepwater reservoir is a challenging task. One approach to characterize a deepwater reservoir and to predict its producibility is by analyzing its depositional information. This research proposes a deposition-based ... More
Evaluation of Mg compounds as coating materials in Mg batteriesFeb 05 2019Mg batteries utilizing a Mg metal anode with a high-voltage intercalation cathode define a potential pathway toward energy storage with high energy density. However, the realization of Mg batteries is plagued by the instability of existing electrolytes ... More
Constrained adaptive sensingJun 19 2015Jul 15 2016Suppose that we wish to estimate a vector $\mathbf{x} \in \mathbb{C}^n$ from a small number of noisy linear measurements of the form $\mathbf{y} = \mathbf{A x} + \mathbf{z}$, where $\mathbf{z}$ represents measurement noise. When the vector $\mathbf{x}$ ... More
The Identification of 93 Day Periodic Photometric Variability for YSO YLW 16AApr 08 2013Periodic variability in young stellar objects (YSOs) offers indirect evidence for an active dynamical mechanism. Starspots, accretion, stellar companions, and disk veiling can contribute to the photometric variability of YSOs. As part of an ongoing study ... More
Faraday Rotation of the Cosmic Microwave Background Polarization by a Stochastic Magnetic FieldSep 30 2004Mar 24 2005A primordial cosmological magnetic field induces Faraday rotation of the cosmic microwave background polarization. This rotation produces a curl-type polarization component even when the unrotated polarization possesses only gradient-type polarization, ... More
Underwater Hacker Missile Wars: A Cryptography and Engineering ContestSep 18 2005For a recent student conference, the authors developed a day-long design problem and competition suitable for engineering, mathematics and science undergraduates. The competition included a cryptography problem, for which a workshop was run during the ... More
Direct tests of single-parameter agingJun 12 2015This paper presents accurate data for the physical aging of organic glasses just below the glass transition probed by monitoring the following quantities after temperature up and down jumps: the shear-mechanical resonance frequency (around 360 kHz), the ... More
Testing Dark Energy Models through Large Scale StructureNov 30 2015We explore the scalar field quintessence freezing model of dark energy with the inverse Ratra-Peebles potential. We study the cosmic expansion and the large scale structure growth rate. We use recent measurements of the growth rate and the baryon acoustic ... More
Primordial Magnetic Helicity Constraints from WMAP Nine-Year DataAug 02 2014Oct 16 2014If a primordial magnetic field in the universe has non-zero helicity, the violation of parity symmetry results in non-zero correlations between cosmic microwave background temperature and B-mode polarization. In this paper we derive approximations to ... More
On the phase structure and thermodynamics of QCDFeb 06 2013Jul 17 2013We discuss the phase structure and thermodynamics of QCD by means of dynamical chiral effective models. Quark and meson fluctuations are included via the functional renormalization group. We study the influence of confinement in addition to the impact ... More
The observational constraints on the flat $φ$CDM modelsNov 30 2017Nov 26 2018Most dark energy models have the $\Lambda$CDM as their limit, and if future observations constrain our universe to be close to $\Lambda$CDM Bayesian arguments about the evidence and the fine-tuning will have to be employed to discriminate between the ... More
One pion production in neutrino reactions: including non-resonant backgroundJul 06 2010Nov 10 2010We investigate neutrino induced one pion production on nucleons. The elementary neutrino--nucleon cross section is calculated as the sum of the leading Delta pole diagram and several background diagrams obtained within the non-linear sigma model. This ... More
Pituitary Adenoma Volumetry with 3D SlicerDec 12 2012In this study, we present pituitary adenoma volumetry using the free and open source medical image computing platform for biomedical research: (3D) Slicer. Volumetric changes in cerebral pathologies like pituitary adenomas are a critical factor in treatment ... More
Neutrino Mass Limit from Galaxy Cluster Number Density EvolutionMar 15 2005May 30 2005Measurements of the evolution with redshift of the number density of massive galaxy clusters are used to constrain the energy density of massive neutrinos and so the sum of neutrino masses $\sum m_\nu$. We consider a spatially-flat cosmological model ... More
Brain-wide 3D imaging of neuronal activity in Caenorhabditis elegans with sculpted lightJun 06 2014Recent efforts in neuroscience research seek to obtain detailed anatomical neuronal wiring maps as well as information on how neurons in these networks engage in dynamic activities. Although the entire connectivity map of the nervous system of C. elegans ... More
Numerical simulations of the decay of primordial magnetic turbulenceApr 19 2010May 13 2010We perform direct numerical simulations of forced and freely decaying 3D magnetohydrodynamic turbulence in order to model magnetic field evolution during cosmological phase transitions in the early Universe. Our approach assumes the existence of a magnetic ... More
Microwave Background Correlations from Dipole Anisotropy ModulationJun 14 2015Full-sky maps of the cosmic microwave background temperature reveal a 7% asymmetry of fluctuation power between two halves of the sky. A common phenomenological model for this asymmetry is an overall dipole modulation of statistically isotropic fluctuations, ... More
Model for the alpha and beta shear-mechanical properties of supercooled liquids and its comparison to squalane dataJan 18 2017Feb 28 2017This paper presents data for supercooled squalane's frequency-dependent shear modulus covering frequencies from 10 mHz to 30 kHz and temperatures from 168 K to 190 K; measurements are also reported for the glass phase down to 146 K. The data reveal a ... More
Physical ageing studied by a device allowing for rapid thermal equilibrationNov 06 2008Ageing of organic glasses to the equilibrium liquid state is studied by measuring the dielectric loss utilizing a microregulator where temperature is controlled by means of a Peltier element. Compared to conventional equipment the new device adds almost ... More
Physical aging studied by a device allowing for rapid thermal equilibrationAug 12 2010Aging to the equilibrium liquid state of organic glasses is studied. The glasses were prepared by cooling the liquid to temperatures just below the glass transition. Aging following a temperature jump was studied by measuring the dielectric loss at a ... More
Some Advances in Role Discovery in GraphsSep 09 2016Role discovery in graphs is an emerging area that allows analysis of complex graphs in an intuitive way. In contrast to other graph prob- lems such as community discovery, which finds groups of highly connected nodes, the role discovery problem finds ... More
Looking for Cosmological Alfven Waves in WMAP DataMar 30 2004Apr 27 2004A primordial cosmological magnetic field induces and supports vorticity or Alfven waves, which in turn generate cosmic microwave background (CMB) anisotropies. A homogeneous primordial magnetic field with fixed direction induces correlations between the ... More
Template-Cut: A Pattern-Based Segmentation ParadigmMay 30 2012We present a scale-invariant, template-based segmentation paradigm that sets up a graph and performs a graph cut to separate an object from the background. Typically graph-based schemes distribute the nodes of the graph uniformly and equidistantly on ... More
The phase structure of the Polyakov--quark-meson model beyond mean fieldJul 31 2010The Polyakov-extended quark-meson model (PQM) is investigated beyond mean-field. This represents an important step towards a fully dynamical QCD computation. Both the quantum fluctuations to the matter sector and the back-reaction of the matter fluctuations ... More
On Minimum Bisection and Related Cut Problems in Trees and Tree-Like GraphsAug 21 2017Minimum Bisection denotes the NP-hard problem to partition the vertex set of a graph into two sets of equal sizes while minimizing the width of the bisection, which is defined as the number of edges between these two sets. We first consider this problem ... More
A critical theory of quantum entanglement for the Hydrogen moleculeApr 04 2007Apr 11 2007In this paper we investigate some entanglement properties for the Hydrogen molecule considered as a two interacting spin 1/2 (qubit) model. The entanglement related to the $H_{2}$ molecule is evaluated both using the von Neumann entropy and the Concurrence ... More
Design and Implementation of Aggregate Functions in the DLV SystemFeb 21 2008Disjunctive Logic Programming (DLP) is a very expressive formalism: it allows for expressing every property of finite structures that is decidable in the complexity class SigmaP2 (= NP^NP). Despite this high expressiveness, there are some simple properties, ... More
Integration of the OpenIGTLink Network Protocol for Image-Guided Therapy with the Medical Platform MeVisLabSep 07 2013We present the integration of the OpenIGTLink network protocol for image-guided therapy (IGT) with the medical prototyping platform MeVisLab. OpenIGTLink is a new, open, simple and extensible network communication protocol for IGT. The protocol provides ... More
Statistical Properties of Scale-Invariant Helical Magnetic Fields and Applications to CosmologyApr 03 2018Aug 16 2018We investigate the statistical properties of isotropic, stochastic, Gaussian distributed, helical magnetic fields characterized by different shapes of the energy spectra at large length scales and study the associated realizability condition. We discuss ... More