Results for "Jasper De Bock"

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A Recursive Algorithm for Computing Inferences in Imprecise Markov ChainsMay 30 2019Jul 01 2019We present an algorithm that can efficiently compute a broad class of inferences for discrete-time imprecise Markov chains, a generalised type of Markov chains that allows one to take into account partially specified probabilities and other types of model ... More
Independent Natural Extension for Infinite SpacesMay 03 2018Sep 24 2018We define and study the independent natural extension of two local uncertainty models for the general case of infinite spaces, using the frameworks of sets of desirable gambles and conditional lower previsions. In contrast to Miranda and Zaffalon (2015), ... More
Credal Networks under Epistemic IrrelevanceJan 27 2017Mar 17 2017A credal network under epistemic irrelevance is a generalised type of Bayesian network that relaxes its two main building blocks. On the one hand, the local probabilities are allowed to be partially specified. On the other hand, the assessments of independence ... More
Convergence of Imprecise Continuous-Time Markov ChainsFeb 17 2016We study the limit behaviour of a generally non-linear ordinary differential equation whose solution is a superadditive generalisation of a stochastic matrix, and provide necessary and sufficient conditions for this solution to be ergodic, in the sense ... More
Independent Natural Extension for Infinite Spaces: Williams-Coherence to the RescueJan 25 2017Apr 29 2017We define the independent natural extension of two local models for the general case of infinite spaces, using both sets of desirable gambles and conditional lower previsions. In contrast to Miranda and Zaffalon (2015), we adopt Williams-coherence instead ... More
First Steps Towards an Imprecise Poisson ProcessMay 14 2019The Poisson process is the most elementary continuous-time stochastic process that models a stream of repeating events. It is uniquely characterised by a single parameter called the rate. Instead of a single value for this rate, we here consider a rate ... More
First Steps Towards an Imprecise Poisson ProcessMay 14 2019Jun 04 2019The Poisson process is the most elementary continuous-time stochastic process that models a stream of repeating events. It is uniquely characterised by a single parameter called the rate. Instead of a single value for this rate, we here consider a rate ... More
Computing Inferences for Large-Scale Continuous-Time Markov Chains by Combining Lumping with ImprecisionApr 03 2018May 31 2018If the state space of a homogeneous continuous-time Markov chain is too large, making inferences - here limited to determining marginal or limit expectations - becomes computationally infeasible. Fortunately, the state space of such a chain is usually ... More
Imprecise Continuous-Time Markov Chains: Efficient Computational Methods with Guaranteed Error BoundsFeb 23 2017Oct 10 2018Imprecise continuous-time Markov chains are a robust type of continuous-time Markov chains that allow for partially specified time-dependent parameters. Computing inferences for them requires the solution of a non-linear differential equation. As there ... More
Credal nets under epistemic irrelevanceAug 06 2012We present a new approach to credal nets, which are graphical models that generalise Bayesian nets to imprecise probability. Instead of applying the commonly used notion of strong independence, we replace it by the weaker notion of epistemic irrelevance. ... More
An alternative approach to coherent choice functionsFeb 28 2019Choice functions constitute a simple, direct and very general mathematical framework for modelling choice under uncertainty. In particular, they are able to represent the set-valued choices that appear in imprecise-probabilistic decision making. We provide ... More
An efficient algorithm for estimating state sequences in imprecise hidden Markov modelsOct 05 2012We present an efficient exact algorithm for estimating state sequences from outputs (or observations) in imprecise hidden Markov models (iHMM), where both the uncertainty linking one state to the next, and that linking a state to its output, are represented ... More
Continuity of imprecise stochastic processes with respect to the pointwise convergence of monotone sequencesFeb 13 2014Jan 25 2017We consider the joint lower expectation of a finite-state imprecise stochastic process, defined using either the Ville-Vovk-Shafer natural extension or the Williams natural extension. In both cases, we show that it is continuous with respect to the pointwise ... More
Continuity of imprecise Markov chains with respect to the pointwise convergence of monotone sequences of gamblesFeb 13 2014Feb 16 2014The aim of these notes is to study the conditions under which the natural extension of an imprecise Markov chain is continuous with respect to the pointwise convergence of monotone (either non-decreasing or non-increasing) sequences of gambles that are ... More
A Desirability-Based Axiomatisation for Coherent Choice FunctionsJun 04 2018Choice functions constitute a simple, direct and very general mathematical framework for modelling choice under uncertainty. In particular, they are able to represent the set-valued choices that typically arise from applying decision rules to imprecise-probabilistic ... More
Computable Randomness is Inherently ImpreciseMar 02 2017May 04 2017We use the martingale-theoretic approach of game-theoretic probability to incorporate imprecision into the study of randomness. In particular, we define a notion of computable randomness associated with interval, rather than precise, forecasting systems, ... More
Imprecise Continuous-Time Markov ChainsNov 17 2016Jun 20 2017Continuous-time Markov chains are mathematical models that are used to describe the state-evolution of dynamical systems under stochastic uncertainty, and have found widespread applications in various fields. In order to make these models computationally ... More
An Imprecise Probabilistic Estimator for the Transition Rate Matrix of a Continuous-Time Markov ChainApr 04 2018Jul 11 2018We consider the problem of estimating the transition rate matrix of a continuous-time Markov chain from a finite-duration realisation of this process. We approach this problem in an imprecise probabilistic framework, using a set of prior distributions ... More
Efficient Computation of Updated Lower Expectations for Imprecise Continuous-Time Hidden Markov ChainsFeb 22 2017May 05 2017We consider the problem of performing inference with imprecise continuous-time hidden Markov chains, that is, imprecise continuous-time Markov chains that are augmented with random output variables whose distribution depends on the hidden state of the ... More
Imprecise Continuous-Time Markov ChainsNov 17 2016Continuous-time Markov chains are mathematical models that are used to describe the state-evolution of dynamical systems under stochastic uncertainty, and have found widespread applications in various fields. In order to make these models computationally ... More
Continuity Properties of Game-theoretic Upper ExpectationsFeb 25 2019Apr 01 2019We consider discrete-time uncertain processes with finite state space and study the properties of game-theoretic upper expectations developed by Shafer and Vovk. We start by proving some basic properties, e.g. monotonicity, law of iterated upper expectations,... ... More
Monte Carlo Estimation for Imprecise Probabilities: Basic PropertiesMay 22 2019We describe Monte Carlo methods for estimating lower envelopes of expectations of real random variables. We prove that the estimation bias is negative and that its absolute value shrinks with increasing sample size. We discuss fairly practical techniques ... More
A study of imprecise Markov chains: joint lower expectations and point-wise ergodic theoremsNov 15 2014Jan 17 2016We justify and discuss expressions for joint lower and upper expectations in imprecise probability trees, in terms of the sub- and supermartingales that can be associated with such trees. These imprecise probability trees can be seen as discrete-time ... More
Continuity Properties of Game-theoretic Upper ExpectationsFeb 25 2019Mar 20 2019We consider discrete-time uncertain processes with finite state space and study the properties of game-theoretic upper expectations developed by Shafer and Vovk. We start by proving some basic properties, e.g. monotonicity, law of iterated upper expectations,... ... More
Continuity of the Shafer-Vovk-Ville OperatorApr 05 2018Jun 08 2018Kolmogorovs axiomatic framework is the best-known approach to describing probabilities and, due to its use of the Lebesgue integral, leads to remarkably strong continuity properties. However, it relies on the specification of a probability measure on ... More
Continuity Properties of Game-theoretic Upper ExpectationsFeb 25 2019We consider discrete-time uncertain processes with finite state space and study the properties of game-theoretic upper expectations developed by Shafer and Vovk. We start by proving some basic properties, e.g. monotonicity, law of iterated upper expectations,... ... More
Hitting Times and Probabilities for Imprecise Markov ChainsMay 21 2019Jul 02 2019We consider the problem of characterising expected hitting times and hitting probabilities for imprecise Markov chains. To this end, we consider three distinct ways in which imprecise Markov chains have been defined in the literature: as sets of homogeneous ... More
Properties of generalized univariate hypergeometric functionsJul 11 2006Based on Spiridonov's analysis of elliptic generalizations of the Gauss hypergeometric function, we develop a common framework for 7-parameter families of generalized elliptic, hyperbolic and trigonometric univariate hypergeometric functions. In each ... More
Hitting Times and Probabilities for Imprecise Markov ChainsMay 21 2019We consider the problem of characterising expected hitting times and hitting probabilities for imprecise Markov chains. To this end, we consider three distinct ways in which imprecise Markov chains have been defined in the literature: as sets of homogeneous ... More
Imprecise Markov Models for Scalable and Robust Performance Evaluation of Flexi-Grid Spectrum Allocation PoliciesJan 17 2018Apr 27 2018The possibility of flexibly assigning spectrum resources with channels of different sizes greatly improves the spectral efficiency of optical networks, but can also lead to unwanted spectrum fragmentation.We study this problem in a scenario where traffic ... More
Tight projections of frames on infinite dimensional Hilbert spacesNov 14 2012We characterize the frames on an infinite dimensional separable Hilbert space that can be projected to a tight frame for an infinite dimensional subspace. A result of Casazza and Leon states that an arbitrary frame for a 2N- or (2N-1)-dimensional Hilbert ... More
The Schur-Horn theorem for operators with three point spectrumOct 08 2010Apr 05 2012We characterize the set of diagonals of the unitary orbit of a self-adjoint operator with three points in the spectrum. Our result gives a Schur-Horn theorem for operators with three point spectrum analogous to Kadison's result for orthogonal projections. ... More
Engineering Faster Sorters for Small Sets of ItemsAug 21 2019Sorting a set of items is a task that can be useful by itself or as a building block for more complex operations. The more sophisticated and fast sorting algorithms become asymptotically, the less efficient they are for small sets of items due to large ... More
Revealing charge-tunneling processes between a quantum dot and a superconducting island through gate sensingMar 21 2019Aug 12 2019We report direct detection of charge-tunneling between a quantum dot and a superconducting island through radio-frequency gate sensing. We are able to resolve spin-dependent quasiparticle tunneling as well as two-particle tunneling involving Cooper pairs. ... More
A Recursive Algorithm for Computing Inferences in Imprecise Markov ChainsMay 30 2019We present an algorithm that can efficiently compute a broad class of inferences for discrete-time imprecise Markov chains, a generalised type of Markov chains that allows one to take into account partially specified probabilities and other types of model ... More
Instanton calculation of the density of states of disordered Peierls chainsMay 07 1998We use the optimal fluctuation method to find the density of electron states inside the pseudogap in disordered Peierls chains. The electrons are described by the one-dimensional Dirac Hamiltonian with randomly varying mass (the Fluctuating Gap Model). ... More
Diagonals of self-adjoint operators with finite spectrumFeb 19 2013May 28 2014Given a finite set $X\subseteq\R$ we characterize the diagonals of self-adjoint operators with spectrum $X$. Our result extends the Schur-Horn theorem from a finite dimensional setting to an infinite dimensional Hilbert space analogous to Kadison's theorem ... More
Geometry and arithmetic on a quintic threefoldSep 13 2000The paper investigates some aspects of the geometry and the arithmetic of a non-rigid Calabi-Yau threefold. Particular emphasis is given to the study of its L-function L(H^3,s) and the Galois representation.
An instability of unitary quantum dynamicsFeb 26 2015Instabilities of equilibrium quantum mechanics are common and well-understood. They are manifested for example in phase transitions, where a quantum system becomes so sensitive to perturbations that a symmetry can be spontaneously broken. Here, we consider ... More
A priori error estimates for compatible spectral discretization of the Stokes problem for all admissible boundary conditionsJun 13 2012This paper describes the recently developed mixed mimetic spectral element method for the Stokes problem in the vorticity-velocity-pressure formulation. This compatible discretization method relies on the construction of a conforming discrete Hodge decomposition, ... More
Constructive proof of the Carpenter's TheoremFeb 27 2013Sep 12 2013We give a constructive proof of Carpenter's Theorem due to Kadison. Unlike the original proof our approach also yields the real case of this theorem.
The Schur-Horn theorem for operators with finite spectrumFeb 19 2013We characterize the set of diagonals of the unitary orbit of a self-adjoint operator with a finite spectrum. Our result extends the Schur-Horn theorem from a finite dimensional setting to an infinite dimensional Hilbert space analogous to Kadison's theorem ... More
Mixed Mimetic Spectral Element Method for Stokes Flow: A Pointwise Divergence-Free SolutionJan 20 2012May 22 2012In this paper we apply the recently developed mimetic discretization method to the mixed formulation of the Stokes problem in terms of vorticity, velocity and pressure. The mimetic discretization presented in this paper and in [50] is a higher-order method ... More
The big q-Jacobi function transformApr 21 1999We give a detailed description of the resolution of the identity of a second order $q$-difference operator considered as an unbounded self-adjoint operator on two different Hilbert spaces. The $q$-difference operator and the two choices of Hilbert spaces ... More
Extended trigonometric Cherednik algebras and nonstationary Schrödinger equations with delta-potentialsApr 28 2011Jun 12 2012We realize an extended version of the trigonometric Cherednik algebra as affine Dunkl operators involving Heaviside functions. We use the quadratic Casimir element of the extended trigonometric Cherednik algebra to define an explicit nonstationary Schr\"odinger ... More
Multivariable q-Racah polynomialsJul 01 1996The Koornwinder-Macdonald multivariable generalization of the Askey-Wilson polynomials is studied for parameters satisfying a truncation condition such that the orthogonality measure becomes discrete with support on a finite grid. For this parameter regime ... More
Correlations between record events in sequences of random variables with a linear trendMay 19 2011Sep 23 2011The statistics of records in sequences of independent, identically distributed random variables is a classic subject of study. One of the earliest results concerns the stochastic independence of record events. Recently, records statistics beyond the case ... More
Ordinary elliptic curves of high rank over $\bar F_p(x)$ with constant j-invariantMay 04 2003We show that under the assumption of Artin's Primitive Root Conjecture, for all primes p there exist ordinary elliptic curves over $\bar F_p(x)$ with arbitrary high rank and constant j-invariant. For odd primes p, this result follows from a theorem which ... More
The Invariant Measure of Homogeneous Markov Processes in The Quarter-Plane: Representation in Geometric TermsDec 13 2011Feb 24 2014We consider the invariant measure of a homogeneous continuous- time Markov process in the quarter-plane. The basic solutions of the global balance equation are the geometric distributions. We first show that the invariant measure can not be a finite linear ... More
Invariant measures and error bounds for random walks in the quarter-plane based on sums of geometric termsFeb 25 2015We consider homogeneous random walks in the quarter-plane. The necessary conditions which characterize random walks of which the invariant measure is a sum of geometric terms are provided in [2,3]. Based on these results, we first develop an algorithm ... More
Space densities of radio AGN: The CoNFIG sampleMay 06 2008The Combined NVSS-FIRST Galaxy (CoNFIG) survey was defined by selecting all sources with S_1.4GHz > 1.3Jy from the NRAO VLA Sky Survey (NVSS) in the north field of the Faint Images of the Radio Sky at Twenty-cm (FIRST) survey. We carried out FRI/FRII ... More
The Quality of Equilibria for Set Packing GamesSep 29 2017We introduce set packing games as an abstraction of situations in which $n$ selfish players select subsets of a finite set of indivisible items, and analyze the quality of several equilibria for this class of games. Assuming that players are able to approximately ... More
Optimizing Star-Convex FunctionsNov 13 2015May 11 2016We introduce a polynomial time algorithm for optimizing the class of star-convex functions, under no restrictions except boundedness on a region about the origin, and Lebesgue measurability. The algorithm's performance is polynomial in the requested number ... More
Records and sequences of records from random variables with a linear trendAug 09 2010We consider records and sequences of records drawn from discrete time series of the form $X_{n}=Y_{n}+cn$, where the $Y_{n}$ are independent and identically distributed random variables and $c$ is a constant drift. For very small and very large drift ... More
Mimetic framework on curvilinear quadrilaterals of arbitrary orderNov 18 2011In this paper higher order mimetic discretizations are introduced which are firmly rooted in the geometry in which the variables are defined. The paper shows how basic constructs in differential geometry have a discrete counterpart in algebraic topology. ... More
In Vitro Durability - Pivot bearing with Diamond Like Carbon for Ventricular Assist DevicesNov 01 2015Institute Dante Pazzanese of Cardiology (IDPC) develops Ventricular Assist Devices (VAD) that can stabilize the hemodynamics of patients with severe heart failure before, during and/or after the medical practice; can be temporary or permanent. The ADV's ... More
Ballistic superconductivity in semiconductor nanowiresJul 10 2017Semiconductor nanowires have opened new research avenues in quantum transport owing to their confined geometry and electrostatic tunability. They have offered an exceptional testbed for superconductivity, leading to the realization of hybrid systems combining ... More
A Sequential Homotopy Method for Mathematical Programming ProblemsFeb 19 2019May 17 2019We propose a sequential homotopy method for the solution of mathematical programming problems formulated in abstract Hilbert spaces under the Guignard constraint qualification. The method is equivalent to performing projected backward Euler timestepping ... More
An Alternative Interpretation of Recent ARPES Measurements on TiSe2Nov 18 2009Recently there has been a renewed interest in the charge density wave transition of TiSe2, fuelled by the possibility that this transition may be driven by the formation of an excitonic insulator or even an excitonic condensate. We show here that the ... More
Decoupling edge versus bulk conductance in the trivial regime of an InAs/GaSb double quantum well using Corbino ring geometryMay 16 2016A Corbino ring geometry is utilized to analyze edge and bulk conductance of InAs/GaSb quantum well structures. We show that edge conductance exists in the trivial regime of this theoretically-predicted topological system with a temperature insensitive ... More
A Linear Programming Approach to Error Bounds for Random Walks in the Quarter-planeSep 12 2014We consider the approximation of the performance of random walks in the quarter-plane. The approximation is in terms of a random walk with a product-form stationary distribution, which is obtained by perturbing the transition probabilities along the boundaries ... More
Gravitino Dark Matter and general neutralino NLSPAug 24 2009We study the scenario of gravitino DM with a general neutralino NLSP in a model independent way. We consider all neutralino decay channels and compare them with the most recent BBN constraints. We check how those bounds are relaxed for a Higgsino or a ... More
HRTF-based two-dimensional robust least-squares frequency-invariant beamformer design for robot auditionDec 19 2016Mar 09 2017In this work, we propose a two-dimensional Head-Related Transfer Function (HRTF)-based robust beamformer design for robot audition, which allows for explicit control of the beamformer response for the entire three-dimensional sound field surrounding a ... More
Game of Sloanes: Best known packings in complex projective spaceJul 18 2019It is often of interest to identify a given number of points in projective space such that the minimum distance between any two points is as large as possible. Such configurations yield representations of data that are optimally robust to noise and erasures. ... More
CosmicNet I: Physics-driven implementation of neural networks within Boltzmann-Einstein solversJul 12 2019Jul 15 2019Einstein-Boltzmann Solvers (EBSs) are run on a massive scale by the cosmology community when fitting cosmological models to data. We present a new concept for speeding up such codes with neural networks. The originality of our approach stems from not ... More
A measurement of Omega from the North American test flight of BOOMERANGNov 24 1999Nov 27 1999We use the angular power spectrum of the Cosmic Microwave Background, measured during the North American test flight of the BOOMERANG experiment, to constrain the geometry of the universe. Within the class of Cold Dark Matter models, we find that the ... More
Fermion-Higgs model with Reduced Staggered FermionsJun 03 1992We introduce a lattice fermion-Higgs model with one component `reduced staggered' fermions. In order to use the fermion field as efficiently as possible we couple the two {\em staggered} flavors to the O(4) Higgs field leading to a model with only one ... More
Cost and Capacity of Signaling in the Escherichia coli Protein Reaction NetworkNov 03 2007In systems biology new ways are required to analyze the large amount of existing data on regulation of cellular processes. Recent work can be roughly classified into either dynamical models of well-described subsystems, or coarse-grained descriptions ... More
Is there a common origin for the WMAP low multipole and for the ellipticity in BOOMERanG CMB maps?Dec 11 2003Dec 16 2003We have measured the ellipticity of several degree scale anisotropies in the BOOMERanG maps of the Cosmic Microwave Background (CMB) at 150 GHz. The average ellipticity is around 2.6-2.7. The biases of the estimator of the ellipticity and for the noise ... More
Dynamical Properties of Gaussian Chains and Rings with Long Range InteractionsJul 23 2019Various authors have invoked discretized fractional Brownian (fBm) motion as a model for chain polymers with long range interaction of monomers along the chain. We show that for these, in contrast to the Brownian case, linear forces are acting between ... More
A Measurement of the Angular Power Spectrum of the CMB Temperature Anisotropy from the 2003 Flight of BoomerangJul 21 2005We report on observations of the Cosmic Microwave Background (CMB) obtained during the January 2003 flight of Boomerang . These results are derived from 195 hours of observation with four 145 GHz Polarization Sensitive Bolometer (PSB) pairs, identical ... More
Data retrieval time for energy harvesting wireless sensor networksOct 13 2015We consider the problem of retrieving a reliable estimate of an attribute monitored by a wireless sensor network, where the sensors harvest energy from the environment independently, at random. Each sensor stores the harvested energy in batteries of limited ... More
Radio and Millimeter Continuum Surveys and their Astrophysical ImplicationsAug 13 2009Sep 09 2009We review the statistical properties of the main populations of radio sources, as emerging from radio and millimeter sky surveys. Recent determinations of local luminosity functions are presented and compared with earlier estimates still in widespread ... More
Interpretable Convolutional Neural Networks for Effective Translation Initiation Site PredictionNov 27 2017Thanks to rapidly evolving sequencing techniques, the amount of genomic data at our disposal is growing increasingly large. Determining the gene structure is a fundamental requirement to effectively interpret gene function and regulation. An important ... More
Topology in time-reversal symmetric crystalsNov 13 2017Dec 22 2018The discovery of topological insulators has reformed modern materials science, promising to be a platform for tabletop relativistic physics, electronic transport without scattering, and stable quantum computation. Topological invariants are used to label ... More
Conductance channels of a platform molecule on Au(111) probed with shot noiseMay 21 2019The shot noise of the current $I$ through junctions to single trioxatriangulenium cations (TOTA$^+$) on Au(111) is measured with a low temperature scanning tunneling microscope using Au tips. The noise is significantly reduced compared to the Poisson ... More
Resolving magnetic frustration in a pyrochlore latticeSep 27 2011CeFe$_2$ is a geometrically frustrated ferromagnet that lies close to an instability at which a subtle change in the lattice symmetry couples to a transition to antiferromagnetism. We use x-ray diffraction, diamond-anvil-cell techniques, and numerical ... More
MAXIMA: an experiment to measure temperature anisotropy in the cosmic microwave backgroundMar 17 1999Mar 17 1999We describe the MAXIMA experiment, a balloon-borne measurement designed to map temperature anisotropy in the Cosmic Microwave Background (CMB) over a wide range of angular scales (multipole range 80 < l < 800). The experiment consists of a 1.3 m diameter ... More
MAXIMA-1: A Measurement of the Cosmic Microwave Background Anisotropy on angular scales of 10 arcminutes to 5 degreesMay 08 2000Oct 02 2000We present a map and an angular power spectrum of the anisotropy of the cosmic microwave background (CMB) from the first flight of MAXIMA. MAXIMA is a balloon-borne experiment with an array of 16 bolometric photometers operated at 100 mK. MAXIMA observed ... More
Physics-based modeling and data representation of pedestrian pairwise interactionsAug 07 2018The possibility to understand and to quantitatively model the physics of the interactions between pedestrians walking in crowds has compelling relevant applications, e.g. related to the design and safety of civil infrastructures. In this work we study ... More
Design of a Highly Reliable Wireless Module for Ultra-Low-Latency Short Range ApplicationsNov 29 2018Current radio systems are currently optimized for capacity and range. However, certain applications of wireless systems require fast and reliable communication over short distances. The challenge of these systems is to communicate with a minimum time ... More
Measurement of a Peak in the Cosmic Microwave Background Power Spectrum from the North American test flight of BOOMERANGNov 24 1999We describe a measurement of the angular power spectrum of anisotropies in the Cosmic Microwave Background (CMB) from 0.3 degrees to ~10 degrees from the North American test flight of the BOOMERANG experiment. BOOMERANG is a balloon-borne telescope with ... More
Chirality-mediated bistability and strong frequency downshifting of the gyrotropic resonance of a dynamically de-stiffened magnetic vortexApr 25 2017We demonstrate an enhanced, bidirectional, in-plane magnetic field tuning of the gyrotropic resonance frequency of a magnetic vortex within a disk by introducing a flat edge. When the core is in its vicinity, the flat edge locally reduces the core's directional ... More
Three year outcome of the Covered Endovascular Reconstruction of the Aortic Bifurcation (CERAB) technique for aortoiliac occlusive diseaseJun 11 2018Objective:The objective of the current study was to demonstrate the three year outcome of the CERAB technique for the treatment of extensive aortoiliac occlusive disease (AIOD). Methods:Between February 2009 and July 2016, all patients treated with the ... More
Reversible Formation of Thermoresponsive Binary Particle Gels with Tunable Structural and Mechanical PropertiesApr 09 2019We investigate the collective behavior of suspended thermoresponsive microgels, that expel solvent and subsequently decrease in size upon heating. Using a binary mixture of differently thermoresponsive microgels, we demonstrate how distinctly different ... More
Molecular Simulations of the Ribosome and Associated Translation FactorsNov 16 2017The ribosome is a macromolecular complex which is responsible for protein synthesis in all living cells according to their transcribed genetic information. Using X-ray crystallography and, more recently, cryo-electron microscopy (cryo-EM), the structure ... More
Searching for non Gaussian signals in the BOOMERanG 2003 CMB mapsMay 11 2007Oct 19 2007We analyze the BOOMERanG 2003 (B03) 145 GHz temperature map to constrain the amplitude of a non Gaussian, primordial contribution to CMB fluctuations. We perform a pixel space analysis restricted to a portion of the map chosen in view of high sensitivity, ... More
Active Decoupling of Transmit and Receive Coils for Full-Duplex MRIOct 22 2018Objective: Concurrent excitation and acquisition in MRI is a method to acquire MRI signal from tissues with very short transverse relaxation time. Since transmit power is many orders of magnitude larger than receive signal, a weak coupling dominates the ... More
Fractional Periodic Processes: Properties and an Application of Polymer Form FactorsJul 23 2019In this paper we introduce and study three classes of fractional periodic processes. An application to ring polymers is investigated. We obtain a closed analytic expressions for the form factors, the Debye functions and their asymptotic decay. The relation ... More
Integral Representation of Generalized Grey Brownian MotionDec 07 2018Jun 04 2019In this paper we investigate the representation of a class of non Gaussian processes, namely generalized grey Brownian motion, in terms of a weighted integral of a stochastic process which is a solution of a certain stochastic differential equation. In ... More
Applicability of transverse mass scaling in hadronic collisions at the LHCOct 05 2017Feb 01 2018We present a study on the applicability of transverse mass scaling for identified particle spectra in proton-proton collisions at $\sqrt{s}=7$ TeV based on data taken by the ALICE experiment at the LHC. The measured yields are parametrized and compared ... More
Energy Functions in Polymer Dynamics in terms of Generalized Grey Brownian MotionJul 19 2018In this paper we investigate the energy functions for a class of non Gaussian processes. These processes are characterized in terms of the Mittag-Leffler function. We obtain closed analytic form for the energy function, in particular we recover the Brownian ... More
Noise estimation in CMB time-streams and fast map-making. Application to the BOOMERanG98 dataJan 04 2001We describe here an iterative method for jointly estimating the noise power spectrum from a CMB experiment's time-ordered data, together with the maximum-likelihood map. We test the robustness of this method on simulated Boomerang datasets with realistic ... More
Cosmology with the SPHEREX All-Sky Spectral SurveyDec 16 2014Mar 25 2015SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer) ( http://spherex.caltech.edu ) is a proposed all-sky spectroscopic survey satellite designed to address all three science goals in NASA's Astrophysics ... More
Photoluminescence of focused ion beam implanted Er$^{3+}$:Y$_{2}$SiO$_{5}$ crystalsJun 20 2014Erbium doped low symmetry Y$_2$SiO$_5$ crystals attract a lot of attention in perspective of quantum information applications. However, only doping of the samples during growth is available up to now, which yields a quite homogeneous doping density. In ... More
Focus Quality Assessment of High-Throughput Whole Slide Imaging in Digital PathologyNov 14 2018One of the challenges facing the adoption of digital pathology workflows for clinical use is the need for automated quality control. As the scanners sometimes determine focus inaccurately, the resultant image blur deteriorates the scanned slide to the ... More
Fermion-Higgs model with strong Wilson-Yukawa coupling in two dimensionsOct 19 1992The fermion mass spectrum is studied in the quenched approximation in the strong coupling vortex phase (VXS) of a globally U(1)$_L \otimes$U(1)$_R$ symmetric scalar-fermion model in two dimensions. In this phase fermion doublers can be completely removed ... More
Infrasonic wave propagation in ultrasoft solids at low Reynolds numbersJul 24 2019The propagation of elastic waves in soft materials plays a crucial role in the spatio-temporal transmission of mechanical signals, e.g. in biological mechanotransduction or in the failure of marginal solids. At high Reynolds numbers $Re \gg 1$, inertia ... More
Chiral fermions in two dimensions?Dec 01 1992Quenched studies of a global U(1) symmetric Wilson-Yukawa model in two dimensions show no evidence of a charged fermion in the vortex phase at strong Wilson-Yukawa coupling while there is strong indication of a massive neutral fermion. However, with the ... More
Cosmic Rays and ClimateApr 11 2008Among the most puzzling questions in climate change is that of solar-climate variability, which has attracted the attention of scientists for more than two centuries. Until recently, even the existence of solar-climate variability has been controversial ... More