Browsing University of Hertfordshire by Title
Now showing items 15702-15721 of 24087
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On the convergence of inhomogeneous Markov chains : Approximating equilibrium placements of flexible objects
(2001)This paper deals with the minimization of local forces in two-dimensional placements of flexible objects within rigid boundaries. The objects are disks of the same size but, in general, of different materials. Potential ... -
On the direct quantification of celecoxib in commercial solid drugs using the TT-PIXE and TT-PIGE techniques
(2006-08)The quantification of the active ingredient (AI) in drugs is a crucial and important step in the drug quality control process. This is usually performed by using wet chemical techniques like LC-MS, UV spectrophotometry and ... -
On the Double-Planet System around HD 83443
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On the dynamical downscaling and bias correction of seasonal-scale winter precipitation predictions over North India
(2016-09-04)This study presents the results of high-resolution (30 km) climate simulations over North India using an optimized configuration of the Regional Climate Model (RegCM), driven by a global spectral model (T80 model with ... -
On the encounter between the GASP galaxy JO36 and the radio plume of GIN 049
(2023-10-16)We report on the serendipitous discovery of an unprecedented interaction between the radio lobe of a radio galaxy and a spiral galaxy. The discovery was made thanks to LOFAR observations at 144 MHz of the galaxy cluster ... -
On the enhancement of speaker identification accuracy using weighted bilateral scoring
(2008-10-16)This paper presents investigations into an effective bilateral scoring method in open-set speaker identification. The approach is based on the fact that two different speakers usually are not reciprocal. A difficulty in ... -
On the estimation of rotational frequency response functions
(KATHOLIEKE UNIV LEUVEN, DEPT WERKTUIGKUNDE, 2005)Rotational receptances can perform an important role when predicting the dynamic behaviour both in theoretical and experimental models, especially when a modification includes a rotational inertia or a rotational stiffness. ... -
On the evolution of the molecular gas fraction of star-forming galaxies
(2011-04)We present IRAM Plateau de Bure interferometric detections of CO (J = 1 -> 0) emission from a 24 mu m-selected sample of star-forming galaxies at z = 0.4. The galaxies have polycyclic aromatic hydrocarbon 7.7 mu m-derived ... -
On the evolutionary history of a simulated disc galaxy as seen by phylogenetic trees
(2023-10-12)Phylogenetic methods have long been used in biology, and more recently have been extended to other fields - for example, linguistics and technology - to study evolutionary histories. Galaxies also have an evolutionary ... -
On the Evolutionary History of a Simulated Disk Galaxy as Seen by Phylogenetic Trees
(2024-02-15)Phylogenetic methods have long been used in biology and more recently have been extended to other fields—for example, linguistics and technology—to study evolutionary histories. Galaxies also have an evolutionary history ... -
On the Evolved Nature of CK Vul
(Astronomical Society of the Pacific, 2008)CK Vul was classified as the oldest observed nova. Recent studies have proven however, that CK Vul cannot be unambiguously classified as any known kind of eruptive variable. We present the optical and radio observations ... -
On the Formation of Lines in Quantum Phase Space
(2023-01-24)We theoretically study the formation of lines in phase space using Wigner’s distribution W. In trapped quantum systems such lines form generically, crisscrossing phase space and they can have astonishing extent, reaching ... -
On the formation of massive galaxies : A simultaneous study of number density, size and intrinsic colour evolution in GOODS
(2009-07-01)The evolution of number density, size and intrinsic colour is determined for a volume-limited sample of visually classified early-type galaxies selected from the Hubble Space Telescope/Advanced Camera for Surveys images ... -
On the fragility of nuclear stellar discs against galaxy mergers: surviving photometric and kinematic signatures of nuclear discs
(2015-10-11)Nuclear stellar discs (NSDs) can help to constrain the assembly history of their host galaxies, as long as we can assume them to be fragile structures that are disrupted during merger events. In this work we investigate ... -
On the frequency of Jupiter analogs
(2011)The Anglo-Australian Planet Search has now accumulated 12 years of radial-velocity data with long-term instrumental precision better than 3 m s-1. In this paper, we expand on earlier simulation work, to probe the frequency ... -
On the geometry of the orthogonal momentum amplituhedron
(2022-12-01)In this paper we focus on the orthogonal momentum amplituhedron Ok, a recently introduced positive geometry that encodes the tree-level scattering amplitudes in ABJM theory. We generate the full boundary stratification of ... -
On the globular cluster formation history of NGC 5128
(2005-09-01)We deduce the globular cluster formation history of the nearby elliptical galaxy, NGC 5128, by using a chemical enrichment model to accurately reproduce its observed metallicity distribution function (MDF). We derive the ... -
On the Hamiltonian integrability of the bi-Yang-Baxter sigma-model
(2016-03-15)The bi-Yang-Baxter σ-model is a certain two-parameter deformation of the principal chiral model on a real Lie group G for which the left and right G-symmetries of the latter are both replaced by Poisson-Lie symmetries. It ...