cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An unexpected drop in the magnetic field of the X-ray pulsar V0332+53 after the bright outburst occurred in 2015
Creators: name: Cusumano, G.
name: La Parola, V.
name: D'Ai, A.
name: Segreto, A.
name: Tagliaferri, G.
name: Barthelmy, S. D.
name: Gehrels, N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: How the accreted mass settling on the surface of a neutron star affects the topology of the magnetic field and how the secular evolution of the binary system depends on the magnetic field change is still an open issue. We report evidence for a clear drop in the observed magnetic field in the accreting pulsar V0332+53 after undergoing a bright 3-month long X-ray outburst. We determine the field from the position of the fundamental cyclotron line in its X-ray spectrum and relate it to the luminosity. For equal levels of luminosity, in the declining phase we measure a systematically lower value of the cyclotron line energy with respect to the rising phase. This results in a drop of ~1.7 x 10^11 G of the observed field between the onset and the end of the outburst. The settling of the accreted plasma onto the polar cap seems to induce a distortion of the magnetic field lines weakening their intensity along the accretion columns. Therefore the dissipation rate of the magnetic field could be much faster than previously estimated, unless the field is able to restore its original configuration on a time-scale comparable with the outbursts recurrence time.
description: 5 pages, 6 figures, Published on MNRAS Letter (2016)
Allium oleraceum Linnaeus 1753
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Amaryllidaceae
Allium
Allium oleraceum

description: Allium oleraceum Linnaeus, Species Plantarum 1: 299. 1753. "Habitat in Suecia, Germania." RCN: 2366. Lectotype (de Wilde-Duyfjes in Meded. Landbouwhoogeschool 76-11: 108. 1976): Herb. Linn. No. 419.22 (LINN). Current name:  Allium oleraceum L. (Liliaceae / Alliaceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part A), pp. 252-342 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 277, DOI: 10.5281/zenodo.291971
Remote transfer of Gaussian quantum discord
Creators: name: Ma, Lingyu
name: Su, Xiaolong
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum discord quantifies quantum correlation between quantum systems, which has potential application in quantum information processing. In this paper, we propose a scheme realizing the remote transfer of Gaussian quantum discord, in which another quantum discordant state or an Einstein-Podolsky-Rosen entangled state serves as ancillary state. The calculation shows that two independent optical modes that without direct interaction become quantum correlated after the transfer. The output Gaussian quantum discord can be higher than the initial Gaussian quantum discord when optimal gain of the classical channel and the ancillary state are chosen. The physical reason for this result comes from the fact that the quantum discord of an asymmetric Gaussian quantum discordant state can be higher than that of a symmetric one. The presented scheme has potential application in quantum information network.
SMA Observations of the Extended CO(6-5) Emission in the Starburst Galaxy NGC253
Creators: name: Krips, Melanie
name: Martin, Sergio
name: Peck, Alison
name: Sakamoto, Kazushi
name: Neri, Roberto
name: Gurwell, Mark
name: Petitpas, Glen
name: Zhao, Jun-Hui
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present observations of the $^{12}$CO(6-5) line and 686GHz continuum emission in NGC253 with the Submillimeter Array at an angular resolution of ~4arcsec. The $^{12}$CO(6-5) emission is clearly detected along the disk and follows the distribution of the lower $^{12}$CO line transitions with little variations of the line ratios in it. A large-velocity gradient analysis suggests a two-temperature model of the molecular gas in the disk, likely dominated by a combination of low-velocity shocks and the disk wide PDRs. Only marginal $^{12}$CO(6-5) emission is detected in the vicinity of the expanding shells at the eastern and western edges of the disk. While the eastern shell contains gas even warmer (T$_{\rm kin}$>300~K) than the hot gas component (T$_{\rm kin}$=300K) of the disk, the western shell is surrounded by gas much cooler (T$_{\rm kin}$=60K) than the eastern shell but somewhat hotter than the cold gas component of the disk (for similar H$_2$ and CO column densities), indicative of different (or differently efficient) heating mechansisms. The continuum emission at 686GHz in the disk agrees well in shape and size with that at lower (sub-)millimeter frequencies, exhibiting a spectral index consistent with thermal dust emission. We find dust temperatures of ~10-30K and largely optically thin emission. However, our fits suggest a second (more optically thick) dust component at higher temperatures (T$_{\rm d}$>60K), similar to the molecular gas. We estimate a global dust mass of ~10$^6$Msun for the disk translating into a gas-to-dust mass ratio of a few hundred consistent with other nearby active galaxies.
description: accepted for publication in ApJ, 21 pages, 12 Figures, 6 Tables; acknowledgements updated in revised version
Some remarks on the monotonicity of primary matrix functions on the set of symmetric matrices
Creators: name: Martin, Robert
name: Neff, Patrizio
Publisher: name: arXiv
Year: 2014
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: This note contains some observations on primary matrix functions and different notions of monotonicity with relevance towards constitutive relations in nonlinear elasticity. Focussing on primary matrix functions on the set of symmetric matrices, we discuss and compare different criteria for monotonicity. The demonstrated results are particularly applicable to computations involving the true-stress-true-strain monotonicity condition, a constitutive inequality recently introduced in an Arch. Appl. Mech. article by C.S. Jog and K.D. Patil. We also clarify a statement by Jog and Patil from the same article which could be misinterpreted.
Collaborative sparse regression using spatially correlated supports - Application to hyperspectral unmixing
Creators: name: Altmann, Yoann
name: Pereyra, Marcelo
name: Bioucas-Dias, Jose
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: This paper presents a new Bayesian collaborative sparse regression method for linear unmixing of hyperspectral images. Our contribution is twofold; first, we propose a new Bayesian model for structured sparse regression in which the supports of the sparse abundance vectors are a priori spatially correlated across pixels (i.e., materials are spatially organised rather than randomly distributed at a pixel level). This prior information is encoded in the model through a truncated multivariate Ising Markov random field, which also takes into consideration the facts that pixels cannot be empty (i.e, there is at least one material present in each pixel), and that different materials may exhibit different degrees of spatial regularity. Secondly, we propose an advanced Markov chain Monte Carlo algorithm to estimate the posterior probabilities that materials are present or absent in each pixel, and, conditionally to the maximum marginal a posteriori configuration of the support, compute the MMSE estimates of the abundance vectors. A remarkable property of this algorithm is that it self-adjusts the values of the parameters of the Markov random field, thus relieving practitioners from setting regularisation parameters by cross-validation. The performance of the proposed methodology is finally demonstrated through a series of experiments with synthetic and real data and comparisons with other algorithms from the literature.
Synthesis of Two Dimensional Rain Fields for Systems using Spatial Diversity
Creators: name: Callaghan, Sarah
name: Vilar, Enric
Publisher: name: Zenodo
Year: 2003
Subjects: subject: data and information
subject: computer science
subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html

description: A poster describing the synthesis of two dimensional rain fields for systems using spatial diversity. Radio communications systems operating at 10 GHz and above suffer significant impairment due to rain, clouds and atmospheric gases. This attenuation is unlikely to be compensated for by fade margin alone. Fade Mitigation Techniques such as site and route diversity rely on the temporal and spatial inhomogeneity of rain to improve the availability of a system. To correctly configure such a system to optimise the availability and minimize the cost requires detailed knowledge of typical rain fields. In some cases it is sometimes more convenient to use simulated data for the testing and development of a system. Cascade models have been proposed as a computationally effective method of performing such simulations, and have also been shown to produce the same statistics as real rain fields.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1166/ The publish date on this item was its original published date. This item was previously associated with content (as an official url) at: http://www.chilbolton.rl.ac.uk. Main files in this record: estec_poster.ppt estec_poster.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Hayley Gray. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Allium pallens Linnaeus 1762
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Amaryllidaceae
Allium
Allium pallens

description: Allium pallens Linnaeus, Species Plantarum, ed. 2, 1: 427. 1762. "Habitat in Italia, Hispania, Monspelii, Pannonia." RCN: 2363. Lectotype (Brullo & al. in Bocconea 16: 558, 562. 2003): Gouan 8, Herb. Linn. No. 419.20 (LINN). Current name:  Allium pallens L. (Liliaceae / Alliaceae). Note: De Wilde-Duyfjes (in Taxon 22: 74. 1973) designated Hasselquist material (Herb. Linn. No. 139.9, S) as lectotype, but this choice was rejected by Brullo & al. on the grounds that, having been collected in the Middle East, it conflicted with the geographical elements of the protologue. Brullo & al. designated material sent to Linnaeus by Gouan as lectotype instead.
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part A), pp. 252-342 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 277, DOI: 10.5281/zenodo.291971
Two-loop leading colour helicity amplitudes for W  ± γ + j production at the LHC
Creators: name: Badger, S
name: Hartanto, HB
name: Kryś, J
name: Zoia, S
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: Regular Article - Theoretical Physics
Higher-Order Perturbative Calculations
Scattering Amplitudes
Specific QCD Phenomenology

description: Abstract We present the two-loop leading colour QCD helicity amplitudes for the process pp → W (→ lν)γ + j. We implement a complete reduction of the amplitudes, including the leptonic decay of the W-boson, using finite field arithmetic, and extract the analytic finite remainders using a recently identified basis of special functions. Simplified analytic expressions are obtained after considering permutations of a rational kinematic parametrisation and multivariate partial fractioning. We demonstrate efficient numerical evaluation of the two-loop colour and helicity summed finite remainders for physical kinematics, and hence the suitability for phenomenological applications.
Determination of normalized magnetic eigenfields in microwave cavities
Creators: name: Helsing, Johan
name: Karlsson, Anders
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: 78M15, 65N25, 35Q61, 31B10

description: The magnetic field integral equation for axially symmetric cavities with perfectly conducting surfaces is discretized according to a high-order convergent Fourier--Nyström scheme. The resulting solver is used to determine eigenwavenumbers and normalized magnetic eigenfields to very high accuracy in the entire computational domain.
description: 23 pages, 4 figures
Selected properties of optical spatial solitons in photorefractive media and their important applications
Creators: name: Konar, S.
name: Trofimov, Vyacheslav A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Some selected important properties of photorefractive spatial solitons and their applications have been reviewed in the present paper. Using band transport model, the governing principle of photorefractive nonlinearity has been addressed and nonlinear dynamical equations of spatial solitons owing to this nonlinearity have been discussed. Mechanisms of formation of screening and photovoltaic solitons of three different configurations i.e., bright, dark and grey varieties have been examined. Incoherently coupled vector solitons due to single and two-photon photorefractive phenomena have been highlighted. Modulation instability, which is precursor to soliton formation has been also discused briefly. Finally possible applications of photorefractive spatial solitons have been highlighted.
description: 17 pages, 3 figures. arXiv admin note: text overlap with arXiv:1209.2211
Galesus (G.) parvulus Kieffer 1911
Creators: name: Notton, David G.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Diapriidae
Galesus
Galesus parvulus

description: Galesus (G.) parvulus Kieffer, 1911a: 853.
Valid name
Psilus parvulus (Kieffer, 1911).
Summary of types
Syntype ♂, BMNH number 9.650.
Primary type data
Clober; Type; 407.; Cameron Coll./ 1910-55.; parvulus K.
Type locality
Scotland.
Remarks
This species was described from an unspecified number of males. The syntype is mounted on a card and is entire.
description: Published as part of Notton, David G., 2014, A catalogue of the types of Diapriinae (Hymenoptera, Diapriidae) at the Natural History Museum, London, pp. 1-123 in European Journal of Taxonomy 75 on page 59, DOI: 10.5852/ejt.2014.75, http://zenodo.org/record/3862773
Walk softly and carry a large carrot: how to give credit for academic work
Creators: name: Callaghan, Sarah
name: Carpenter, Todd
name: Kratz, John Ernest
Publisher: name: Zenodo
Year: 2015
Subjects: subject: data and information
subject: computer science
subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html

description: A poster to show how to give credit for academic work. Researchers want to know how their work impacts their communities, and the wider world; including research outputs other than peer-reviewed journal publications. The journal paper provides a way of claiming and defining an area of intellectual work, and citation of articles allows the acknowledgement of that work by others. Yet the paper can only give an overview of the work - it is not possible to publish everything into a paper that is needed to make it fully reproducible. For providing credit (and for making recruitment and promotion decisions) we abstract the paper further. Instead of reading every citing paper, we instead count the citations, reckoning this an appropriate proxy for the quality of the paper, and hence the described work. Citation counts for datasets are one of the "carrots" promised to researchers for their efforts in citing and publishing data, also producing a metric by which the quality of a dataset can be evaluated. Quality is a slippery concept when it comes to data, which can be good quality for one purpose, and bad for another. Measuring the impact of research directly is difficult, so we resort to measuring what we can (number of citations). Care must be taken with indirect measurements to ensure that they map appropriately to what we really want to measure.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1167/ The publish date on this item was its original published date. This item was previously associated with content (as an official url) at: https://rd-alliance.org/groups/rdawds-publishing-data-bibliometrics-wg.html. Main files in this record: FORCE2015_poster.ppt FORCE2015_poster.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Hayley Gray. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Attosecond delay of xenon $4d$ photoionization at the giant resonance and Cooper minimum
Creators: name: Magrakvelidze, Maia
name: Madjet, Mohamed El-Amine
name: Chakraborty, Himadri S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: A Kohn-Sham time-dependent local-density-functional scheme is utilized to predict attosecond time delays of xenon 4d photoionization that involves the 4d giant dipole resonance and Cooper minimum. The fundamental effect of electron correlations to uniquely determine the delay at both regions is demonstrated. In particular, for the giant dipole resonance, the delay underpins strong collective effect, emulating the recent prediction at C60 giant plasmon resonance [T. Barillot et al, Phys. Rev. A 91, 033413 (2015)]. For the Cooper minimum, a qualitative similarity with a photorecombination experiment near argon 3p minimum [S. B. Schoun et al, Phys. Rev. Lett. 112, 153001 (2014)] is found. The result should encourage attosecond measurements of Xe 4d photoemission.
description: 6 pages, 3 figures, submitted
An AP-Structure with Finslerian Flavor: Path Equations
Creators: name: Wanas, M. I.
name: Kahil, M. E.
name: Kamal, Mona M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Bazanski approach for deriving paths is applied to Finsler geometry. The approach is generalized and applied to a new developed geometry called "Absolute parallelism with a Finslerian Flavor" (FAP). A sets of path equations is derived for the FAP. This is the horizontal (h) set. A striking feature appears in this set, that is: the coefficient of torsion term, in the set, jumps by a step of one-half from one equation to the other. This is tempting to believe that the h-set admits some quantum features. Comparisons with the corresponding sets in other geometries are given. Conditions to reduce the set of path equations obtained, to well known path equations in some geometries are summarized in a schematic diagram.
Fractal analysis of rain fields for communications system design
Creators: name: Callaghan, Sarah
name: Vilar, Enric
Publisher: name: Zenodo
Year: 2004
Subjects: subject: data and information
subject: computer science
subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html

description: A poster to show the fractal analysis of rain fields for communications system design. Communications systems operating at frequencies above 10 GHz suffer from severe attenuation due to rain, clouds and atmospheric gases, though rain is the dominant factor responsible for most of the time-variant fading experienced. Systems currently in operation deal with this problem by allocating a fixed fade margin. However, for higher frequencies this is economically unfeasible as the fade margin required to provide a set quality of service becomes too high. For this reason, much attention is being paid to methods of dealing with fades on an adaptive and reactive basis. Such methods are collectively known as Fade Mitigation Techniques (FMTs). One FMT, which concerns the (time-variant) two dimensional distribution of the precipitation rate R(x,y,t) (mm/h), is called Space Diversity.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1168/ The publish date on this item was its original published date. This item was previously associated with content (as an official url) at: http://www.chilbolton.rl.ac.uk. This work was funded by: Science Technology Facilities Council (STFC). Main files in this record: Fractal2004_poster.ppt Fractal2004_poster.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Hayley Gray. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Polymerization, the Problem of Access to the Saddle Point Approximation, and Thermodynamics
Creators: name: Morales-Técotl, Hugo A.
name: Orozco-Borunda, Daniel H.
name: Rastgoo, Saeed
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The saddle point approximation to the partition functions is an important way of deriving the thermodynamical properties of black holes. However, there are certain black hole models and some mathematically analog mechanical models for which this method can not be applied directly. This is due to the fact that their action evaluated on a classical solution is not finite and its first variation does not vanish for all consistent boundary conditions. These problems can be dealt with by adding a counter-term to the classical action, which is a solution of the corresponding Hamilton-Jacobi equation. In this work however, we seek an alternative solution to this problem via the polymer quantization which is motivated by the loop quantum gravity.
description: 6 pages, Contribution to the proceedings of The Fourteenth Marcel Grossmann Meeting - MG14, to appear in a related book published by World Scientific, Singapore, 2016, text overlap with arXiv:1507.08651 [gr-qc]
Allium paniculatum Linnaeus 1759
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Amaryllidaceae
Allium
Allium paniculatum

description: Allium paniculatum Linnaeus, Systema Naturae, ed. 10, 2: 978. 1759. ["Habitat in Sibiria, Italia, Austria, Oriente."] Sp. Pl., ed. 2, 1: 428 (1762). RCN: 2364. Lectotype (de Wilde-Duyfjes in Taxon 22: 75. 1973): Gerber ?, Herb. Linn. No. 419.21, right specimen (LINN). Current name:  Allium paniculatum L. (Liliaceae / Alliaceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part A), pp. 252-342 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 277, DOI: 10.5281/zenodo.291971
Turbulent pair dispersion as a ballistic cascade phenomenology
Creators: name: Bourgoin, Mickael
Publisher: name: arXiv
Year: 2014
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Since the pioneering work of Richardson in 1926, later refined by Batchelor and Obukhov in 1950, it is predicted that the rate of separation of pairs of fluid elements in turbulent flows with initial separation at inertial scales, grows ballistically first (Batchelor regime), before undergoing a transition towards a super-diffusive regime where the mean-square separation grows as t^3 (Richardson regime). Richardson empirically interpreted this super-diffusive regime in terms of a non-Fickian process with a scale dependent diffusion coefficient (the celebrated Richardson's "4/3rd" law). However, the actual physical mechanism at the origin of such a scale dependent diffusion coefficient remains unclear. The present article proposes a simple physical phenomenology for the time evolution of the mean square relative separation in turbulent flows, based on a scale dependent ballistic scenario rather than a scale dependent diffusive. This phenomenology accurately retrieves most of the known features of relative dispersion ; among others : (i) it is quantitatively consistent with recent numerical simulations and experiments (both for the short term Batchelor regime and the long term Richardson regime, and for all initial separations at inertial scales), (ii) it gives a simple physical explanation of the origin of the super diffusive t^3 Richardson regime which naturally builts itself as an iterative process of elementary short-term-scale-dependent ballistic steps, (iii) it shows that the Richardson constant is directly related to the Kolmogorov constant (and eventually to a ballistic persistence parameter) and (iv) in a further extension of the phenomenology, taking into account third order corrections, it robustly describes the temporal asymmetry between forward and backward dispersion, with an explicit connection to the cascade of energy flux across scales.
The EMBLA Survey -- Metal-poor stars in the Galactic bulge
Creators: name: Howes, Louise M.
name: Asplund, Martin
name: Keller, Stefan C.
name: Casey, Andrew R.
name: Yong, David
name: Lind, Karin
name: Frebel, Anna
name: Hays, Austin
name: Alves-Brito, Alan
name: Bessell, Michael S.
name: Casagrande, Luca
name: Marino, Anna F.
name: Nataf, David M.
name: Owen, Christopher I.
name: Da Costa, Gary S.
name: Schmidt, Brian P.
name: Tisserand, Patrick
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Cosmological models predict the oldest stars in the Galaxy should be found closest to the centre of the potential well, in the bulge. The EMBLA Survey successfully searched for these old, metal-poor stars by making use of the distinctive SkyMapper photometric filters to discover candidate metal-poor stars in the bulge. Their metal-poor nature was then confirmed using the AAOmega spectrograph on the AAT. Here we present an abundance analysis of 10 bulge stars with -2.8
description: 20 pages, 16 figures. Accepted to Monthly Notices of the Royal Astronomical Society. Online tables can be found at http://www.astro.lu.se/~louise/data
Graphical LASSO Based Model Selection for Time Series
Creators: name: Jung, Alexander
name: Hannak, Gabor
name: Görtz, Norbert
Publisher: name: arXiv
Year: 2014
Subjects: subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We propose a novel graphical model selection (GMS) scheme for high-dimensional stationary time series or discrete time process. The method is based on a natural generalization of the graphical LASSO (gLASSO), introduced originally for GMS based on i.i.d. samples, and estimates the conditional independence graph (CIG) of a time series from a finite length observation. The gLASSO for time series is defined as the solution of an l1-regularized maximum (approximate) likelihood problem. We solve this optimization problem using the alternating direction method of multipliers (ADMM). Our approach is nonparametric as we do not assume a finite dimensional (e.g., an autoregressive) parametric model for the observed process. Instead, we require the process to be sufficiently smooth in the spectral domain. For Gaussian processes, we characterize the performance of our method theoretically by deriving an upper bound on the probability that our algorithm fails to correctly identify the CIG. Numerical experiments demonstrate the ability of our method to recover the correct CIG from a limited amount of samples.
Low-|t| structures in elastic scattering at the LHC
Creators: name: Jenkovszky, Laszlo
name: Lengyel, Alexander
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Possible low-$|t|$ structures in the differential cross section of $pp$ elastic scattering at the LHC are predicted. It is argued that the change of the slope of the elastic cross section near $t=-0.1$ GeV$^2$ has the same origin as that observed in 1972 at the ISR, both related to the $4m_π^2$ branch point in the $|t|$-channel of the scattering amplitude. Apart from that structure, tiny oscillations at small $|t|$ may be present on the cone at low $|t|$.
description: 13 pages, 4 Tables; to be published in Acta Physica Polonica B
Wireless distance estimation with low-power standard components in wireless sensor nodes
Creators: name: Jörger, Thorbjörn
name: Höflinger, Fabian
name: Gamm, Gerd Ulrich
name: Reindl, Leonhard M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences
subject: B.1.m

description: In the context of increasing use of moving wireless sensor nodes the interest in localizing these nodes in their application environment is strongly rising. For many applications, it is necessary to know the exact position of the nodes in two- or three-dimensional space. Commonly used nodes use state-of-the-art transceivers like the CC430 from Texas Instruments with integrated signal strength measurement for this purpose. This has the disadvantage, that the signal strength measurement is strongly dependent on the orientation of the node through the antennas inhomogeneous radiation pattern as well as it has a small accuracy on long ranges. Also, the nodes overall attenuation and output power has to be calibrated and interference and multipath effects appear in closed environments. Another possibility to trilaterate the position of a sensor node is the time of flight measurement. This has the advantage, that the position can also be estimated on long ranges, where signal strength methods give only poor accuracy. In this paper we present an investigation of the suitability of the state-of-the-art transceiver CC430 for a system based on time of flight methods and give an overview of the optimal settings under various circumstances for the in-field application. For this investigation, the systematic and statistical errors in the time of flight measurements with the CC430 have been investigated under a multitude of parameters. Our basic system does not use any additional components but only the given standard hardware, which can be found on the Texas Instruments evaluation board for a CC430. Thus, it can be implemented on already existent sensor node networks by a simple software upgrade.
description: 8 pages, Proceedings of the 14th Mechatronics Forum International Conference, Mechatronics 2014
MPX Detectors as LHC Luminosity Monitor
Creators: name: Sopczak, Andre
name: Ali, Babar
name: Asbah, Nedaa
name: Bergmann, Benedikt
name: Bekhouche, Khaled
name: Caforio, Davide
name: Campbell, Michael
name: Heijne, Erik
name: Leroy, Claude
name: Lipniacka, Anna
name: Nessi, Marzio
name: Pospisil, Stanislav
name: Seifert, Frank
name: Solc, Jaroslav
name: Soueid, Paul
name: Suk, Michal
name: Turecek, Daniel
name: Vykydal, Zdenek
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: A network of 16 Medipix-2 (MPX) silicon pixel devices was installed in the ATLAS detector cavern at CERN. It was designed to measure the composition and spectral characteristics of the radiation field in the ATLAS experiment and its surroundings. This study demonstrates that the MPX network can also be used as a self-sufficient luminosity monitoring system. The MPX detectors collect data independently of the ATLAS data-recording chain, and thus they provide independent measurements of the bunch-integrated ATLAS/LHC luminosity. In particular, the MPX detectors located close enough to the primary interaction point are used to perform van der Meer calibration scans with high precision. Results from the luminosity monitoring are presented for 2012 data taken at sqrt(s) = 8 TeV proton-proton collisions. The characteristics of the LHC luminosity reduction rate are studied and the effects of beam-beam (burn-off) and beam-gas (single bunch) interactions are evaluated. The systematic variations observed in the MPX luminosity measurements are below 0.3% for one minute intervals.
description: Presented at the IEEE 2015 Nuclear Science Symposium, San Diego, USA
New examples of three-dimensional dilational materials
Creators: name: Milton, Graeme Walter
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Two-dimensional dilational materials, for which the only easy mode of deformation is a dilation are reviewed and connections are drawn between models previously proposed in the literature. Some models which appear to be dilational materials, but which in fact are not, are also discussed. Finally, four new examples of three-dimensional dilational materials are given.
description: 11 pages
Allium parviflorum Linnaeus 1762
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Amaryllidaceae
Allium
Allium parviflorum

description: Allium parviflorum Linnaeus, Species Plantarum, ed. 2, 1: 427. 1762. "Habitat in Europa australi." RCN: 2359. Lectotype (de Wilde-Duyfjes in Taxon 22: 76. 1973): Herb. Linn. No. 419.14 (LINN). Current name:  Allium parviflorum L. (Liliaceae / Alliaceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part A), pp. 252-342 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 277, DOI: 10.5281/zenodo.291971
Consistency of matter models with asymptotically safe quantum gravity
Creators: name: Donà, P.
name: Eichhorn, Astrid
name: Percacci, Roberto
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss the compatibility of quantum gravity with dynamical matter degrees of freedom. Specifically, we present bounds we obtained in [1] on the allowed number and type of matter fields within asymptotically safe quantum gravity. As a novel result, we show bounds on the allowed number of spin-3/2 (Rarita-Schwinger) fields, e.g., the gravitino. These bounds, obtained within truncated Renormalization Group flows, indicate the compatibility of asymptotic safety with the matter fields of the standard model. Further, they suggest that extensions of the matter content of the standard model are severely restricted in asymptotic safety. This means that searches for new particles at colliders could provide experimental tests for this particular approach to quantum gravity.
description: prepared for the proceedings of Theory Canada 9; new results on the gravitino, 8 pages, 1 figure, 1 table
Details of plans to make site diversity measurements using stentor
Creators: name: Callaghan, Sarah
name: Ventouras, Spiros
name: Wrench, Charlie L
Publisher: name: Zenodo
Year: 2003
Subjects: subject: data and information
subject: computer science
subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html

description: A poster detailing the plans to make site diversity measurements using stentor. STENTOR, the French experimental satellite, has been built as a test bed for future technologies. Its scheduled launch date is October 2001. The propagation payload on the satellite provides the UK with an opportunity to increase the knowledge base of slant path propagation loss at Ka and V-Band. Having already collected data from OLYMPUS and ITALSAT measurements we now have the possibility to record slant path data for a period of more than 10 years from one site. In addition, by having close involvement with the experimental measurement campaign we are developing close links with French groups who intend to make the first measurements of V-Band slant path loss from a tropical site (Guyana). This experiment should serve to answer important questions about the cost effectiveness of site diversity as a fade mitigation technique, and also serve as an important step in the process of understanding the spatio-temporal structure of rain and rain cells.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1169/ The publish date on this item was its original published date. This item was previously associated with content (as an official url) at: http://www.chilbolton.rl.ac.uk. This work was funded by: Science Technology Facilities Council (STFC). Main files in this record: ICAP01_poster.ppt ICAP01_poster.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Hayley Gray. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Spin lattices, state transfer and bivariate Krawtchouk polynomials
Creators: name: Genest, Vincent X.
name: Miki, Hiroshi
name: Vinet, Luc
name: Zhedanov, Alexei
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum state transfer properties of a class of two-dimensional spin lattices on a triangular domain are investigated. Systems for which the 1-excitation dynamics is exactly solvable are identified. The exact solutions are expressed in terms of the bivariate Krawtchouk polynomials that arise as matrix elements of the unitary representations of the rotation group on the states of the three-dimensional harmonic oscillator.
description: Proceedings of Theory Canada 9, Waterloo, June 2014. Based on invited talk given by Luc Vinet at this conference
The German Network for Bioinformatics Infrastructure (de.NBI) and software applications for microbial genome analysis
Creators: name: Goesmann, Alexander
Publisher: name: Zenodo
Year: 2022
Subjects: HeFDI
Hessische Forschungsdateninfrastrukturen
Research Data Management
big data analysis tools
cloud services
BiGi center for microbial bioinformatics
FAIR Data
HeFDI Data Talks
HeFDI Data Talks 2021

description: Presentation by Prof. Dr. Alexander Goesmann, Justus Liebig University Giessen, on the German Network for Bioinformatics Infrastructure (de.NBI), presented at HeFDI Data Talks 2021.
Reducing ion energy spread in hole-boring radiation pressure acceleration by using two-ion-species targets
Creators: name: Weng, S. M.
name: Murakami, M.
name: Sheng, Z. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The generation of fast ion beams in the hole-boring radiation pressure acceleration by intense laser pulses has been studied for targets with different ion components. We find that the oscillation of the longitudinal electric field for accelerating ions can be effectively suppressed by using a two-ion-species target, because fast ions from a two-ion-species target are distributed into more bunches and each bunch bears less charge. Consequently, the energy spread of ion beams generated in the hole-boring radiation pressure acceleration can be greatly reduced down to 3.7% according to our numerical simulation.
description: Accepted for publication in Laser and Particle Beams on 7th October 2014
Poisson Group Testing: A Probabilistic Model for Boolean Compressed Sensing
Creators: name: Emad, Amin
name: Milenkovic, Olgica
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We introduce a novel probabilistic group testing framework, termed Poisson group testing, in which the number of defectives follows a right-truncated Poisson distribution. The Poisson model has a number of new applications, including dynamic testing with diminishing relative rates of defectives. We consider both nonadaptive and semi-adaptive identification methods. For nonadaptive methods, we derive a lower bound on the number of tests required to identify the defectives with a probability of error that asymptotically converges to zero; in addition, we propose test matrix constructions for which the number of tests closely matches the lower bound. For semi-adaptive methods, we describe a lower bound on the expected number of tests required to identify the defectives with zero error probability. In addition, we propose a stage-wise reconstruction algorithm for which the expected number of tests is only a constant factor away from the lower bound. The methods rely only on an estimate of the average number of defectives, rather than on the individual probabilities of subjects being defective.
Galesus (G.) foersteri var. nigricornis Kieffer 1911
Creators: name: Notton, David G.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Diapriidae
Galesus
Galesus foersteri
Galesus (g.) foersteri var. nigricornis kieffer, 1911a: 856

description: Galesus (G.) foersteri var. nigricornis Kieffer, 1911a: 856.
Valid name
Psilus fuscipennis (Curtis, 1831) syn. nov.
Summary of types
Lectotype ♂, BMNH number 9.922, here designated. Paralectotypes 2 ♂♂.
Primary type data
Glen Lyon; Type; 408.; Cameron Coll./ 1910-55.; atricornis.
Type locality
Scotland, Glen Lyon.
Remarks
The original description was based on an unspecified number of males, of which three were found. All the syntypes agree well with the description. Kieffer evidently changed the name between labelling the specimens and writing the description; the connection is clear from the names: atricornis and nigricornis are closely related, since ater and niger are both Latin words meaning black. The lectotype is mounted on a card and is entire. This specimen belongs to Psilus fuscipennis following the interpretation of Nixon (1980) and the two species are synonymized here.
description: Published as part of Notton, David G., 2014, A catalogue of the types of Diapriinae (Hymenoptera, Diapriidae) at the Natural History Museum, London, pp. 1-123 in European Journal of Taxonomy 75 on page 59, DOI: 10.5852/ejt.2014.75, http://zenodo.org/record/3862773
Allium porrum Linnaeus 1753
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Amaryllidaceae
Allium
Allium porrum

description: Allium porrum Linnaeus, Species Plantarum 1: 295. 1753, nom. rej. "Habitat - - - –” RCN: 2345. Lectotype (de Wilde-Duyfjes in Taxon 22: 77. 1973): [icon] “Porrum” in Dodoëns, Stirp. Hist. Pempt., ed. 2: 688. 1616. Current name:  Allium porrum L. (Liliaceae / Alliaceae). Note: Allium porrum is rejected against A. ampeloprasum L.
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part A), pp. 252-342 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 277, DOI: 10.5281/zenodo.291971
Applications of rain field modelling in radio communications
Creators: name: Callaghan, Sarah
Publisher: name: Zenodo
Year: 2008
Subjects: subject: data and information
subject: computer science
subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html

description: A presentation about applications of rain field modelling in radio communications. The market for mobile phones is saturated, so the commercial push is for new applications to encourage users to increase usage of the operators' services The UK spectrum auction for 3G mobile licenses in March 2000 resulted in a total of 22 billion pounds being spent by the mobile phone companies to buy the rights to certain bands of the radio spectrum These licenses are needed in order to provide 3G services like mobile internet and TV-on-demand. These services are very bandwidth-intensive, and the radio spectrum at mobile phone frequencies is very congested, but the UK government wants to encourage growth in this technological area So, what can we do? Improve spectrum efficiency at lower frequencies Open up higher frequencies (which are under-used) to commercial exploitation
description: Previously curated at: http://cedadocs.ceda.ac.uk/1170/ The publish date on this item was its original published date. This item was previously associated with content (as an official url) at: http://www.chilbolton.rl.ac.uk. This work was funded by: Science Technology Facilities Council (STFC). Main files in this record: ICWIP_poster.ppt ICWIP_poster.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Hayley Gray. Transferred to CEDA document repository community on Zenodo on 2022-11-24
NFDI4Chem - Digitising Research Workflows in Chemistry
Creators: name: Jung, Nicole
name: Jolliffe, John
Publisher: name: Zenodo
Year: 2021
Subjects: HeFDI
Hessische Forschungsdateninfrastrukturen
NFDI
NFDI4Chem
Forschungsdatenmanagement
chemistry
workflow
HeFDI Data Talks
HeFDI Data Talks 2021

description: NFDI4Chem Vortrag von Dr. Nicole Jung und Dr. John Jolliffe über die Digitalisierung chemischer Forschungsarbeiten, vorgetragen bei den HeFDI Data Talks 2021.
Color-octet Companions of a 750 GeV Heavy Pion
Creators: name: Bai, Yang
name: Barger, Vernon
name: Berger, Joshua
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Color octet bosons are a universal prediction of models in which the 750 GeV diphoton resonance corresponds to a pion of a QCD-like composite sector. We show that the existing searches for dijet and photon plus jet resonances at the LHC constrain single productions of color octet states and can be translated into stringent limits on the 750 GeV diphoton rate. For a minimal 5 + 5bar model, the 750 GeV diphoton signal cross section at the 13 TeV LHC is constrained to be below around 5 fb. Future LHC searches for the photon plus jet resonances can establish evidence of a new color-octet state with 20/fb and validate a pion-like explanation for the 750 GeV resonance.
description: 6 pages, 6 figures
Allium ramosum Linnaeus 1753
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Amaryllidaceae
Allium
Allium ramosum

description: Allium ramosum Linnaeus, Species Plantarum 1: 296. 1753. "Habitat in Sibiria. G. Demidoff." RCN: 2352. Lectotype (Friesen in Feddes Repert. 106: 75. 1995): Gmelin, Herb. Linn. No. 419.8/9 (LINN). Current name:  Allium ramosum L. (Liliaceae / Alliaceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part A), pp. 252-342 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 277, DOI: 10.5281/zenodo.291971