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A new basis for filament simulation in three dimensionsJul 10 2019Jul 11 2019Simulations of slender inextensible filaments in a viscous fluid are often plagued by numerical stiffness. Recent coarse-graining studies have reduced the computational requirements of such systems, though have thus far been limited to the motion of planar ... More

The pairwise hydrodynamic interactions of synchronized spermatozoaJun 01 2019The journey of mammalian spermatozoa in nature is well-known to be reliant on their individual motility. Often swimming in crowded microenvironments, the progress of any single swimmer is likely dependent on their interactions with other nearby swimmers. ... More

A new basis for filament simulation in three dimensionsJul 10 2019Simulations of slender inextensible filaments in a viscous fluid are often plagued by numerical stiffness. Recent coarse-graining studies have reduced the computational requirements of such systems, though have thus far been limited to the motion of planar ... More

Filament mechanics in a half-space via regularised Stokeslet segmentsApr 02 2019Apr 09 2019We present a generalisation of efficient numerical frameworks for modelling fluid-filament interactions via the discretisation of a recently-developed, non-local integral equation formulation to incorporate regularised Stokeslets with half-space boundary ... More

Filament mechanics in a half-space via regularised Stokeslet segmentsApr 02 2019We present a generalisation of efficient numerical frameworks for modelling fluid-filament interactions via the discretisation of a recently-developed, non-local integral equation formulation to incorporate regularised Stokeslets with half-space boundary ... More

Searching for MACHOs in Andromeda with INTSep 15 1999Two teams are using the Isaac Newton Telescope to conduct a microlensing search for massive compact halo objects (MACHOs) in Andromeda. We discuss both the motivation of the surveys and the obstacles they must overcome. The key to success is the spatial ... More

Lighting up the dark and dim in the Andromeda GalaxyOct 28 2003I discuss current and future applications of pixel lensing: the microlensing of unresolved stars. Pixel lensing is the tool of choice for studying the Macho dark matter content of external galaxies like Andromeda (M31), and is at the heart of an ambitious ... More

Modeling the near-UV band of GK stars, Paper II: NLTE modelsJan 04 2012We present a grid of atmospheric models and synthetic spectral energy distributions (SEDs) for late-type dwarfs and giants of solar and 1/3 solar metallicity with many opacity sources computed in self-consistent Non-Local Thermodynamic Equilibrium (NLTE), ... More

Coloured Noise from Stochastic Inflows in Reaction-Diffusion SystemsOct 30 2018Nov 30 2018In this paper we present a framework for investigating coloured noise in reaction-diffusion systems. We start by considering a deterministic reaction-diffusion equation and show how external forcing can cause temporally correlated or coloured noise. Here, ... More

Boundary behaviours of Leishmania mexicana: a hydrodynamic simulation studyJun 01 2018Nov 16 2018It is well established that the parasites of the genus Leishmania exhibit complex surface interactions with the sandfly vector midgut epithelium, but no prior study has considered the details of their hydrodynamics. Here, the boundary behaviours of motile ... More

Infinitesimal Lipschitz conditions on family of analytic varietiesFeb 08 2019In this work, we extend the concept of the double of an ideal defined in \cite{G2}, to the context of modules. We also obtain the genericity of the infinitesimal Lipschitz condition A for an enlarged class of analytic spaces.

Hard Thermal Loops, Weak Gravitational Fields and The Quark Gluon Energy Momentum TensorSep 13 1994We use an auxiliary field construction to discuss the hard thermal loop effective action associated with massless thermal SU(N) QCD interacting with a weak gravitational field. It is demonstrated that the previous attempt to derive this effective action ... More

Weak subintegral closure of idealsAug 22 2007Sep 12 2008We describe some basic facts about the weak subintegral closure of ideals in both the algebraic and complex-analytic settings. We focus on the analogy between results on the integral closure of ideals and modules and the weak subintegral closure of an ... More

Approximate actions for dynamical fermionsAug 07 1997Recent developments and applications of approximate actions for full lattice QCD are described. We present first results based on the stochastic estimation of the fermion determinant on $12^3\times 24$ configurations at $\beta=5.2$.

Modeling the near-UV band of GK stars, Paper III: Dependence on abundance patternApr 17 2013We extend the grid of NLTE models presented in Paper II to explore variations in abundance pattern in two ways: 1) The adoption of the Asplund et al. (2009) (GASS10) abundances, 2) For stars of metallicity, [M/H], of -0.5, the adoption of a non-solar ... More

Automatic Discovery and Geotagging of Objects from Street View ImageryAug 28 2017Dec 01 2017Many applications such as autonomous navigation, urban planning and asset monitoring, rely on the availability of accurate information about objects and their geolocations. In this paper we propose to automatically detect and compute the GPS coordinates ... More

Equation of state of warm-dense boron nitride combining computation, modeling, and experimentFeb 02 2019The equation of state (EOS) of materials at warm dense conditions poses significant challenges to both theory and experiment. We report a combined computational, modeling, and experimental investigation leveraging new theoretical and experimental capabilities ... More

Where in the World are You? Geolocation and Language Identification in TwitterAug 03 2013The movements of ideas and content between locations and languages are unquestionably crucial concerns to researchers of the information age, and Twitter has emerged as a central, global platform on which hundreds of millions of people share knowledge ... More

The local Euler obstruction and topology of the stabilization of associated determinantal varietiesNov 02 2016Nov 10 2016This work has two complementary parts, in the first part we compute the local Euler obstruction of generic determinantal varieties and apply this result to compute the Chern--Schwartz--MacPherson class of such varieties. In the second part we compute ... More

Bayesian inference of inaccuracies in radiation transport physics from inertial confinement fusion experimentsFeb 23 2013First principles microphysics models are essential to the design and analysis of high energy density physics experiments. Using experimental data to investigate the underlying physics is also essential, particularly when simulations and experiments are ... More

The mechanical influence of single fibre inclusions in discrete fibre networksJan 17 2018Semiflexible biopolymer networks are commonly found in biological systems, from the cytoskeleton of cells to the extracellular matrix. Such networks often naturally occur as composites, in which various components interact to generate rich mechanical ... More

The genericity of the infinitesimal Lipschitz condition for hypersurfacesMar 21 2013Oct 11 2014We continue the development of the theory of infinitesimal Lipschitz equivalence, showing the genericity of the condition for families of hypersurfaces with isolated singularities.

Development of a Bayesian method for the analysis of inertial confinement fusion experiments on the NIFFeb 23 2013The complex nature of inertial confinement fusion (ICF) experiments results in a very large number of experimental parameters that are only known with limited reliability. These parameters, combined with the myriad physical models that govern target evolution, ... More

The local Euler obstruction and topology of the stabilization of associated determinantal varietiesNov 02 2016This work has two complementary parts, in the first part we compute the local Euler obstruction of generic determinantal varieties and apply this result to compute the Chern--Schwartz--MacPherson class of such varieties. In the second part we compute ... More

The local Euler obstruction and topology of the stabilization of associated determinantal varietiesNov 02 2016Nov 22 2016This work has two complementary parts, in the first part we compute the local Euler obstruction of generic determinantal varieties and apply this result to compute the Chern--Schwartz--MacPherson class of such varieties. In the second part we compute ... More

The local Euler obstruction and topology of the stabilization of associated determinantal varietiesNov 02 2016Nov 06 2017This work has two complementary parts, in the first part we compute the local Euler obstruction of generic determinantal varieties and apply this result to compute the Chern--Schwartz--MacPherson class of such varieties. In the second part we compute ... More

Bayesian Analysis of Inertial Confinement Fusion Experiments at the National Ignition FacilityJul 02 2012We develop a Bayesian inference method that allows the efficient determination of several interesting parameters from complicated high-energy-density experiments performed on the National Ignition Facility (NIF). The model is based on an exploration of ... More

Invariants of D(q,p) singularitiesAug 01 2005Feb 20 2007The basic examples of functions defining non-isolated hypersurface singularities are the A(d) singularities and the D(q,p) singularities. The A(d) singularities, up to analytic equivalence, are the product of a Morse function and the zero map, while the ... More

MACHOs and the clouds of uncertaintyJul 11 2000I review proposals for explaining the current gravitational microlensing results from the EROS and MACHO surveys towards the Magellanic Clouds. Solutions involving massive compact halo objects (MACHOs), both baryonic and non-baryonic, as well as solutions ... More

Nilpotents, Integral Closure and Equisingularity conditionsJul 28 2005In earlier work, the author described various stratification conditions for a complex analytic set X in terms of the theory of integral closure of modules. However, even if an analytic set has a reduced structure, often geometric operations like intersection ... More

Infinitesimal bi-Lipschitz Equivalence of FunctionsJan 20 2016We introduce two different notions of infinitesimal bi-Lipschitz equivalence for functions, one related to bi-Lipschitz triviality of families of functions, one related to homeomorphisms which are bi-Lipschitz on the fibers of the functions in the family. ... More

The Multiplicity-Polar TheoremMar 21 2007Given a family of pairs of modules parametrised by a smooth space Y, the Multiplicity-Polar Theorem relates the multiplicity of the pair of modules at a special point of the parameter to the multiplicity of the pair at a generic point. This theorem is ... More

The multiplicity of pairs of modules and hypersurface singularitiesSep 02 2005This paper applies the multiplicity polar theorem to the study of hypersurfaces with non-isolated singularities. The multiplicity polar theorem controls the multiplicity of a pair of modules in a family by relating the multiplicity at the special fiber ... More

The Multiplicity Polar Theorem and Isolated SingularitiesSep 13 2005Using invariants from commutative algebra to count geometric objects is a basic idea in singularities. For example, the multiplicity of an ideal is used to count points of intersection of two analytic sets at points of non-transverse intersection. A problem ... More

Shape staggering of mid-shell mercury isotopes from in-source laser spectroscopy compared with Density Functional Theory and Monte Carlo Shell Model calculationsFeb 28 2019Neutron-deficient $^{177-185}$Hg isotopes were studied using in-source laser resonance-ionization spectroscopy at the CERN-ISOLDE radioactive ion-beam facility, in an experiment combining different detection methods tailored to the studied isotopes. These ... More

Regular orbits of sporadic simple groupsJan 14 2018Given a finite group $G$ and a faithful irreducible $FG$-module $V$ where $F$ has prime order, does $G$ have a regular orbit on $V$? This problem is equivalent to determining which primitive permutation groups of affine type have a base of size 2. We ... More

VISTA variables in the Sagittarius dwarf spheroidal galaxy: pulsation- vs. dust-driven winds on the giant branchesJan 15 2014Variability is examined in over 2.6 million stars covering 11 square degrees of the core of the Sagittarius dwarf spheroidal galaxy (Sgr dSph) from VISTA Z-band observations. Generally, pulsation on the Sgr dSph giant branches appears to be excited by ... More

X-rays in the Orion Nebula Cluster: Constraints on the origins of magnetic activity in pre-main sequence starsNov 04 2002A recent Chandra/ACIS observation of the Orion Nebula Cluster detected 1075 sources (Feigelson et al. 2002), providing a uniquely large and well-defined sample to study the dependence of magnetic activity on bulk properties for stars descending the Hayashi ... More

MOA-2016-BLG-227Lb: A Massive Planet Characterized by Combining Lightcurve Analysis and Keck AO ImagingApr 06 2017May 11 2017We report the discovery of a microlensing planet --- MOA-2016-BLG-227Lb --- with a large planet/host mass ratio of $q \simeq 9 \times 10^{-3}$. This event was located near the $K2$ Campaign 9 field that was observed by a large number of telescopes. As ... More

Segre Numbers and Hypersurface SingularitiesNov 01 1996We define the Segre numbers of an ideal as a generalization of the multiplicity of an ideal of finite colength. We prove generalizations of various theorems involving the multiplicity of an ideal such as a principle of specialization of integral dependence, ... More

The detectability of habitable exomoons with KeplerApr 10 2013In this paper, the detectability of habitable exomoons orbiting around giant planets in M-dwarf systems using Transit Timing Variations (TTVs) and Transit Timing Durations (TDVs) with Kepler-class photometry is investigated. Light curves of systems with ... More

Interpreting the candidate Galactic microlensing eventsJun 13 1994Mar 21 1995Four microlensing collaborations are presently searching for compact matter in the Galaxy and all have detected possible candidates. Using the detection efficiencies recently published by the MACHO and OGLE collaborations, we present Monte-Carlo calculations ... More

Co-rank of weakly parafree $3$-manifold groupsNov 29 2017Recall that a group is called large if it has a finite index subgroup which surjects onto a non-abelian free group. By work of Agol and Cooper-Long-Reid, most 3-manifold groups are large; in particular, the fundamental groups of hyperbolic 3-manifolds ... More

Effective dynamics for solitons in the nonlinear Klein Gordon Maxwell system and the Lorentz force lawMay 07 2009We consider the nonlinear Klein Gordon Maxwell system on four dimensional Minkowski space-time. For appropriate nonlinearities the system admits soliton solutions which are gauge invariant generalizations of the non-topological solitons introduced and ... More

A note on concordance properties of fibers in Seifert homology spheresJul 30 2017In this note, we collect various properties of Seifert homology spheres from the viewpoint of Dehn surgery along a Seifert fiber. We expect that many of these are known to various experts, but include them in one place which we hope to be useful in the ... More

Specialization of integral dependence for modulesOct 03 1996May 14 1998We establish the principle of specialization of integral dependence for submodules of finite colength of free modules, as part of the general algebraic-geometric theory of the Buchsbaum--Rim multiplicity. Then we apply the principle to the study of equisingularity ... More

The A_f condition and relative conormal spaces for functions with non-vanishing derivativeFeb 14 2018Feb 06 2019We introduce a join construction as a way of completing the description of the relative conormal space of a function, and then apply a recent result of the second author to deduce a numerical criterion for the A_f condition for the case when the function ... More

Pairs of modules and determinantal isolated singularitiesDec 31 2014Jan 01 2016We continue the development of the study of the equisingularity of isolated singularities, in the determinantal case. This version of the paper includes a substantial amount of new material (76% larger). The new material introduces the idea of the landscape ... More

Scalable Topological Data Analysis and Visualization for Evaluating Data-Driven Models in Scientific ApplicationsJul 19 2019With the rapid adoption of machine learning techniques for large-scale applications in science and engineering comes the convergence of two grand challenges in visualization. First, the utilization of black box models (e.g., deep neural networks) calls ... More

Positive LinksMar 26 2013Given a link L in the 3-sphere, we ask whether the components of L bound disjoint, nullhomologous disks properly embedded in a simply-connected positive-definite smooth 4-manifold; the knot case has been studied extensively in work of Cochran-Harvey-Horn. ... More

In Search of Evidence for Toroidal B Fields Associated with the Jets of AGNSep 24 2003Evidence is mounting that many of the transverse jet B fields observed in BL Lac objects on parsec scales represent the dominant toroidal component of the intrinsic jet B fields. If this is the case, this may give rise to rotation-measure (RM) gradients ... More

Size matters: performance declines if your pixels are too big or too smallApr 18 2008We present a conceptual model that describes the effect of pixel size on target acquisition. We demonstrate the use of our conceptual model by applying it to predict and explain the results of an experiment to evaluate users' performance in a target acquisition ... More

Caveat Emptor, Computational Social Science: Large-Scale Missing Data in a Widely-Published Reddit CorpusMar 13 2018As researchers use computational methods to study complex social behaviors at scale, the validity of this computational social science depends on the integrity of the data. On July 2, 2015, Jason Baumgartner published a dataset advertised to include ``every ... More

Equisingularity and EIDSFeb 01 2016The study of Essentially Isolated Determinantal Singularites or EIDS was initiated by Ebeling and Gusein-Zade. They are non-smoothable as determinantal singularities, and in general have non-isolated singularities. Their singularities are generic in a ... More

VISTA's view of the Sagittarius dwarf spheroidal galaxy and southern Galactic BulgeAug 20 2013We present the deepest near-infrared (ZJKs) photometry yet obtained of the Sagittarius dwarf spheroidal (Sgr dSph), using VISTA to survey 11 square degrees centred on its core. We list locations and ZJKs-band magnitudes for over 2.9 million sources in ... More

VISTA Variables in the Vía Láctea (VVV): Halfway Status and ResultsJun 12 2014The VISTA Variables in the V\'ia L\'actea (VVV) survey is one of six public ESO surveys, and is now in its 4th year of observing. Although far from being complete, the VVV survey has already delivered many results, some directly connected to the intended ... More

X-ray emitting young stars in the Orion NebulaMar 19 2002The Orion Nebula Cluster and the molecular cloud in its vicinity have been observed with the ACIS-I detector on board the Chandra X-ray Observatory with 23 hours exposure. We detect 1075 X-ray sources: 91% are spatially associated with known stellar members ... More

Reference image selection for difference imaging analysisApr 28 2014Difference image analysis (DIA) is an effective technique for obtaining photometry in crowded fields, relative to a chosen reference image. As yet, however, optimal reference image selection is an unsolved problem. We examine how this selection depends ... More

Visualization of Publication ImpactMay 20 2016Measuring scholarly impact has been a topic of much interest in recent years. While many use the citation count as a primary indicator of a publications impact, the quality and impact of those citations will vary. Additionally, it is often difficult to ... More

Besançon Galactic model analysis of MOA-II microlensing: evidence for a mass deficit in the inner bulgeOct 21 2015Galactic bulge microlensing surveys provide a probe of Galactic structure. We present the first field-by-field comparison between microlensing observations and the Besan\c{c}on population synthesis Galactic model. Using an updated version of the model ... More

Admissible Time Series Motif Discovery with Missing DataFeb 15 2018The discovery of time series motifs has emerged as one of the most useful primitives in time series data mining. Researchers have shown its utility for exploratory data mining, summarization, visualization, segmentation, classification, clustering, and ... More

Stigmergy in Comparative Settlement Choice and Palaeoenvironment SimulationMay 29 2015Decisions on settlement location in the face of climate change and coastal inundation may have resulted in success, survival or even catastrophic failure for early settlers in many parts of the world. In this study we investigate various questions related ... More

Rearrangement of valence neutrons in the neutrinoless double-$β$ decay of $^{136}$XeNov 16 2016A quantitative description of the change in ground-state neutron occupancies between $^{136}$Xe and $^{136}$Ba, the initial and final state in the neutrinoless double-$\beta$ decay of $^{136}$Xe, has been extracted from precision measurements of the cross ... More

Helical Magnetic Fields Associated with the Relativistic Jets of Four BL Lac ObjectsMay 20 2004Evidence has been mounting that many of the transverse jet B fields observed in BL Lac objects on parsec scales represent the dominant vvroidal compoent of the intrinsic jet B fields. Such fields could come about, for example, as a result of the "winding ... More

HEPData: a repository for high energy physics dataApr 18 2017The Durham High Energy Physics Database (HEPData) has been built up over the past four decades as a unique open-access repository for scattering data from experimental particle physics papers. It comprises data points underlying several thousand publications. ... More

Brief encounter networksSep 03 2007Many complex human and natural phenomena can usefully be represented as networks describing the relationships between individuals. While these relationships are typically intermittent, previous research has used network representations that aggregate ... More

Pixel lensing towards M31 in principle and in practiceApr 18 2000The Andromeda galaxy (M31) provides a new line of sight for Galactic MACHO studies and also a signature, near-far asymmetry, which may establish the existence of MACHOs in the M31 halo. We outline the principles behind the so-called ``pixel-lensing'' ... More

Rapidly Rotating Lenses: Repeating features in the lightcurves of short period binary microlensesJul 07 2011Sep 16 2011Microlensing is most sensitive to binary lenses with relatively large orbital separations, and as such, typical binary microlensing events show little or no orbital motion during the event. However, despite the strength of binary microlensing features ... More

Towards the Design of Effective Freehand Gestural Interaction for Interactive TVMar 26 2016As interactive devices become pervasive, people are beginning to looking for more advanced interaction with televisions in the living room. Interactive television has the potential to offer a very engaging experience. But most common user tasks are still ... More

Detectability of Orbital Motion in Stellar Binary and Planetary MicrolensesOct 28 2010A standard binary microlensing event lightcurve allows just two parameters of the lensing system to be measured: the mass ratio of the companion to its host, and the projected separation of the components in units of the Einstein radius. However, other ... More

Heegaard Floer homology and splicing homology spheresApr 07 2019We prove a basic inequality for the d-invariants of a splice of knots in homology spheres. As a result, we are able to prove a new relation on the rank of reduced Floer homology under maps between Seifert fibered homology spheres, improving results of ... More

Probabilistic models for joint clustering and time-warping of multidimensional curvesOct 19 2012In this paper we present a family of algorithms that can simultaneously align and cluster sets of multidimensional curves measured on a discrete time grid. Our approach is based on a generative mixture model that allows non-linear time warping of the ... More

The Lê numbers of the square of a function and their applicationsAug 08 2005L\^e numbers were introduced by Massey with the purpose of numerically controlling the topological properties of families of non-isolated hypersurface singularities and describing the topology associated with a function with non-isolated singularities. ... More

The Multiplicity Polar Theorem, collections of 1-forms and Chern numbersDec 30 2011In this work we show how the Multiplicity Polar Theorem can be used to calculate Chern numbers for a collection of 1-forms.

Equisingularity of sections, $(t^r)$ condition, and the integral closure of modulesAug 30 2005This paper uses the theory of integral closure of modules to study the sections of both real and complex analytic spaces. The stratification conditions used are the (t^) conditions introduced by Thom and Trotman. Our results include a new simple proof ... More

Observation and control of shock waves in individual nanoplasmasDec 31 2013In a novel experiment that images the momentum distribution of individual, isolated 100-nm-scale plasmas, we make the first experimental observation of shock waves in nanoplasmas. We demonstrate that the introduction of a heating pulse prior to the main ... More

Experimental Comparison of Representation Methods and Distance Measures for Time Series DataDec 09 2010The previous decade has brought a remarkable increase of the interest in applications that deal with querying and mining of time series data. Many of the research efforts in this context have focused on introducing new representation methods for dimensionality ... More

Single-Molecule Protein Identification by Sub-Nanopore SensorsApr 08 2016Jan 09 2017Recent advances in top-down mass spectrometry enabled identification of intact proteins, but this technology still faces challenges. For example, top-down mass spectrometry suffers from a lack of sensitivity since the ion counts for a single fragmentation ... More

An Evaluation of Methods for Real-Time Anomaly Detection using Force Measurements from the Turning ProcessDec 20 2018We examined the use of three conventional anomaly detection methods and assess their potential for on-line tool wear monitoring. Through efficient data processing and transformation of the algorithm proposed here, in a real-time environment, these methods ... More

Single-Molecule Protein Identification by Sub-Nanopore SensorsApr 08 2016Recent advances in top-down mass spectrometry enabled identification of intact proteins, but this technology still faces challenges. For example, top-down mass spectrometry suffers from a lack of sensitivity since the ion counts for a single fragmentation ... More

A Data Mining framework to model Consumer Indebtedness with Psychological FactorsFeb 20 2015Modelling Consumer Indebtedness has proven to be a problem of complex nature. In this work we utilise Data Mining techniques and methods to explore the multifaceted aspect of Consumer Indebtedness by examining the contribution of Psychological Factors, ... More

Are Spine--Sheath Polarization Structures in the Jets of Active Galactic Nuclei Associated with Helical Magnetic Fields?Oct 24 2014Oct 28 2014One possible origin for polarization structures across jets of Active Galactic Nuclei (AGNs) with a central "spine" of orthogonal magnetic field and a "sheath" of longitudinal magnetic field along one or both edges of the jet is the presence of a helical ... More

Using Clustering to extract Personality Information from socio economic dataJul 08 2013It has become apparent that models that have been applied widely in economics, including Machine Learning techniques and Data Mining methods, should take into consideration principles that derive from the theories of Personality Psychology in order to ... More

Ethnicity sensitive author disambiguation using semi-supervised learningAug 31 2015May 04 2016Author name disambiguation in bibliographic databases is the problem of grouping together scientific publications written by the same person, accounting for potential homonyms and/or synonyms. Among solutions to this problem, digital libraries are increasingly ... More

Numerical Stability of Lanczos MethodsSep 17 1999The Lanczos algorithm for matrix tridiagonalisation suffers from strong numerical instability in finite precision arithmetic when applied to evaluate matrix eigenvalues. The mechanism by which this instability arises is well documented in the literature. ... More

Towards an explanation for the 30 Dor (LMC) Honeycomb nebula - the impact of recent observations and spectral analysisJun 14 2010The unique Honeycomb nebula, most likely a peculiar supernova remnant, lies in 30 Doradus in the Large Magellanic Cloud. Due to its proximity to SN1987A, it has been serendipitously and intentionally observed at many wavelengths. Here, an optical spectral ... More

Blow-Analytic Equivalence versus contact-bi-Lipschitz EquivalenceJan 22 2016Jan 25 2016Two blow-analytically equivalent real analytic plane function germs are sub-analytically bi-Lipschitz contact equivalent

The SPEDE spectrometerSep 21 2017The electron spectrometer, SPEDE, has been developed and will be employed in conjunction with the Miniball spectrometer at the HIE-ISOLDE facility, CERN. SPEDE allows for direct measurement of internal conversion electrons emitted in-flight, without employing ... More

Oxide-mediated self-limiting recovery of field effect mobility in plasma-treated MoS$_2$Jun 26 2017Precise tunability of electronic properties of 2D nanomaterials is a key goal of current research in this field of materials science. Chemical modification of layered transition metal dichalcogenides leads to the creation of heterostructures of low-dimensional ... More

Femtosecond X-ray Laser induced transient electronic phase change observed in fullerene C60Sep 24 2012X-ray Free-Electron Lasers (XFELs) deliver X-ray pulses with a coherent flux that is approximately eight orders of magnitude greater than that available from a modern third generation synchrotron source. The power density in an XFEL pulse may be so high ... More

Probing ultrafast ππ*/nπ* internal conversion in organic chromophores via K-edge resonant absorptionOct 25 2016Organic chromophores with heteroatoms possess an important excited state relaxation channel from an optically allowed {\pi}{\pi}* to a dark n{\pi}*state. We exploit the element and site specificity of soft x-ray absorption spectroscopy to selectively ... More

Direct measurement of time-dependent density-density correlations in a solid through the acoustic analog of the dynamical Casimir effectJan 15 2013The macroscopic characteristics of a solid, such as its thermal, optical or transport properties are determined by the available microscopic states above its lowest energy level. These slightly higher quantum states are described by elementary excitations ... More

Mapping the Human Body at Cellular Resolution -- The NIH Common Fund Human BioMolecular Atlas ProgramMar 18 2019Jun 07 2019Transformative technologies are enabling the construction of three dimensional (3D) maps of tissues with unprecedented spatial and molecular resolution. Over the next seven years, the NIH Common Fund Human Biomolecular Atlas Program (HuBMAP) intends to ... More

Prediction of tool-wear in turning of medical grade cobalt chromium molybdenum alloy (ASTM F75) using non-parametric Bayesian modelsAug 10 2016We present a novel approach to estimating the effect of control parameters on tool wear rates and related changes in the three force components in turning of medical grade Co-Cr-Mo (ASTM F75) alloy. Co-Cr-Mo is known to be a difficult to cut material ... More

Mapping the Human Body at Cellular Resolution -- The NIH Common Fund Human BioMolecular Atlas ProgramMar 18 2019Transformative technologies are enabling the construction of three dimensional (3D) maps of tissues with unprecedented spatial and molecular resolution. Over the next seven years, the NIH Common Fund Human Biomolecular Atlas Program (HuBMAP) aims to develop ... More

A morpho-kinematic and spectroscopic study of the bipolar nebulae: M 2-9, Mz 3, and Hen 2-104Sep 17 2015Context. Complex bipolar shapes can be generated either as a planetary nebula or a symbiotic system. The origin of the material ionised by the white dwarf is very different in these two scenarios, and it complicates the understanding of the morphologies ... More

A General Framework for Density Based Time Series Clustering Exploiting a Novel Admissible Pruning StrategyDec 02 2016Time Series Clustering is an important subroutine in many higher-level data mining analyses, including data editing for classifiers, summarization, and outlier detection. It is well known that for similarity search the superiority of Dynamic Time Warping ... More

Time Series Classification to Improve Poultry WelfareNov 07 2018Poultry farms are an important contributor to the human food chain. Worldwide, humankind keeps an enormous number of domesticated birds (e.g. chickens) for their eggs and their meat, providing rich sources of low-fat protein. However, around the world, ... More

Predictions for the Detection and Characterization of a Population of Free-Floating Planets with K2 Campaign 9May 03 2016K2 Campaign 9 (K2C9) offers the first chance to measure parallaxes and masses of members of the large population of free-floating planets (FFPs) that has previously been inferred from measurements of the rate of short-timescale microlensing events. Using ... More

Representation Learning by Reconstructing NeighborhoodsNov 05 2018Nov 06 2018Since its introduction, unsupervised representation learning has attracted a lot of attention from the research community, as it is demonstrated to be highly effective and easy-to-apply in tasks such as dimension reduction, clustering, visualization, ... More