cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Towards a theory of parallel algorithms on concrete data structures
Creators: name: S. D.(Stephen D.) Brookes
name: Geva, Shai
Publisher: name: Carnegie Mellon University
Year: 2008
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Abstract: "Building on Kahn and Plotkin's theory of concrete data structures and sequential functions, Berry and Curien defined an intensional model of sequential algorithms between concrete data structures. In this paper we report on an attempt to develop a similar intensional model of concurrent computation. We present a notion of parallel algorithm between concrete data structures, together with suitable application and currying operations. We define an intensional strictness ordering on parallel algorithms, with respect to which application is well behaved (at first order types).We define the input-output function computed by a parallel algorithm, and we show that every parallel algorithm computes a continuous function. Thus, a parallel algorithm may be viewed as a continuous function together with a parallel computation strategy. In contrast, a Berry-Curien sequential algorithm may be viewed as a sequential function together with a sequential computation strategy. The intensional strictness ordering on parallel algorithms corresponds to the pointwise ordering on the functions they compute, in the same sense that the set inclusion ordering used by Berry and Curien on sequential algorithms corresponds to the stable ordering on the functions they compute.We believe that the ideas and results presented here constitute a first step towards a fuller understanding of the intensional semantics of parallelism, even though the model presented here is not yet general enough to provide a satisfactory account of higher order algorithms, and lacks a notion of composition for algorithms. We present some ideas for overcoming these deficiencies, and some directions for further research."
Zipf and Heaps laws from dependency structures in component systems
Creators: name: Mazzolini, Andrea
name: Grilli, Jacopo
name: De Lazzari, Eleonora
name: Osella, Matteo
name: Lagomarsino, Marco Cosentino
name: Gherardi, Marco
Publisher: name: arXiv
Year: 2018
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Complex natural and technological systems can be considered, on a coarse-grained level, as assemblies of elementary components: for example, genomes as sets of genes, or texts as sets of words. On one hand, the joint occurrence of components emerges from architectural and specific constraints in such systems. On the other hand, general regularities may unify different systems, such as the broadly studied Zipf and Heaps laws, respectively concerning the distribution of component frequencies and their number as a function of system size. Dependency structures (i.e., directed networks encoding the dependency relations between the components in a system) were proposed recently as a possible organizing principles underlying some of the regularities observed. However, the consequences of this assumption were explored only in binary component systems, where solely the presence or absence of components is considered, and multiple copies of the same component are not allowed. Here, we consider a simple model that generates, from a given ensemble of dependency structures, a statistical ensemble of sets of components, allowing for components to appear with any multiplicity. Our model is a minimal extension that is memoryless, and therefore accessible to analytical calculations. A mean-field analytical approach (analogous to the "Zipfian ensemble" in the linguistics literature) captures the relevant laws describing the component statistics as we show by comparison with numerical computations. In particular, we recover a power-law Zipf rank plot, with a set of core components, and a Heaps law displaying three consecutive regimes (linear, sub-linear and saturating) that we characterize quantitatively.
Fachkräftemangel – Fact oder Fake?
Creators: name: von Felten, Daniel
Publisher: name: fmpro, Schweizerischer Verband für Facility Management und Maintenance
Year: 2024
Subjects: Fachkräftemangel
Facility Management
Kinderbetreuung
Lohn
331: Arbeitsökonomie

description: Schlagzeilen rund um den Fachkräftemangel sind fast schon an der Tagesordnung. Wenn das so viele schreiben, dann muss es doch wahr sein – oder nicht? Der Artikel geht dem Lärm um den sogenannten Fachkräftemangel kritisch nach und zeigt auf, was dabei nicht stimmig ist, wie rückläufige Reallöhne, arbeitsmarktliche Zurückweisung der über 50jährigen, penible Unterstützung von Familie und Beruf oder des hausgemachten Mangels an Pflegefachkräften und ÄrztInnen im Gesundheitswesen.
Synthesis models in a probabilistic framework: metrics of fitting
Creators: name: Cervino, M.
name: Luridiana, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In general, synthesis models provide the mean value of the distribution of possible integrated luminosities, this distribution (and not only its mean value) being the actual description of the integrated luminosity. Therefore, to obtain the closest model to an observation only provides confi- dence about the precision of such a fit, but not information about the accuracy of the result. In this contribution we show how to overcome this drawback and we propose the use of the theoretical mean-averaged dispersion that can be produced by synthesis models as a metric of fitting to infer accurate physical parameters of observed systems.
description: Invited talk in "New Quests in stellar astrophysics II. Ultraviolet properties of evolved stellar populations" in press. 8 pages, 5 figures. (Part II on metric of fitting for population synthesis)
Restricted diagonalization of finite spectrum normal operators and a theorem of Arveson
Creators: name: Loreaux, Jireh
Publisher: name: arXiv
Year: 2017
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 47B15, 47A53 (Primary) 46C05 (Secondary)

description: Kadison characterized the diagonals of projections and observed the presence of an integer. Arveson later recognized this integer as a Fredholm index obstruction applicable to any normal operator with finite spectrum coincident with its essential spectrum whose elements are the vertices of a convex polygon. Recently, in joint work with Kaftal, the author linked the Kadison integer to essential codimension of projections. This paper provides an analogous link between Arveson's obstruction and essential codimension as well as a new approach to Arveson's theorem which also allows for generalization to any finite spectrum normal operator. In fact, we prove that Arveson's theorem is a corollary of a trace invariance property of arbitrary normal operators. An essential ingredient is a formulation of Arveson's theorem in terms of diagonalization by a unitary which is a Hilbert-Schmidt perturbation of the identity.
description: 14 pages
Identification of root exudates from the Pb-accumulator Sedum alfredii under Pb stresses and assessment of their roles
Creators: name: Luo, Qing
name: Wang, Shiyu
name: Sun, Li-na
name: Wang, Hui
name: Bao, Tong
name: Adeel, Muhammad
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Plant Biology

description: The Pb-accumulator Sedum alfredii is a good phytoremediation material, and widely used in the phytoremediation research of soils contaminated with Pb. The root exudates from it may be playing a significant role in the process of phytoremediation. In this study, the metabonomics method which based on gas chromatography–mass spectrometry (GC–MS) and pattern recognition analysis was used to identify the remarkable root exudates from S. alfredii under different Pb stresses, including exposure concentrations (0, 10, 50, 200 and 1000 µmol/L) and times (4 and 8 days). And batch extraction experiments were used to verify the roles of these remarkable root exudates. According to the results, 11 metabolites were considered as the remarkable metabolites. Oxalic acid, galactonic acid and glyceric acid can remove Pb in soil, and the removal effect was: oxalic acid > galactonic acid > glyceric acid. Xylose, glucose and maltose have no removal effect for Pb in soil.
Needs of families receiving early intervention : experiences in five countries
Creators: name: Akhbari Ziegler, Schirin
name: Üzer, Sevil
name: Palomo, Rocío
name: Zalanskieneė, Kristina
name: Hadders-Algra, Mijna
Publisher: name: ZHAW Zurich University of Applied Sciences
Year: 2024
Subjects: Family
Early intervention
COPCA
Parents experiences
Child
Special needs
Neurodevelopment
Disorder
306.8: Familiensoziologie
618.92: Pädiatrie

description: Introduction: Infants at risk of neurodevelopmental disorders require early intervention. We know that interventions that address the entire family and that meet the individual needs of families may positively impact family well-being and infant development. But what do we actually know about the needs of parents of infants with or at risk of neurodevelopmental receiving early intervention? How do parents experience such interventions? Do the needs and experiences of parents vary between countries and cultures? The aim of this project was to explore the needs and experiences of parents of infants receiving early intervention in five countries: Germany, Lithuania, Spain, Switzerland, and Turkey. 
Participants: Parents of infants at risk of or with neurodevelopmental disorders from five countries who received family-centred early intervention through COPCA® 2023 course participants. The parents were asked about their needs regarding early intervention and experiences with COPCA® by means of a questionnaire and/ or through a semi-structured interview. Data collection is completed in January 2024.
Results: At the meeting results are available. Preliminary data suggest that across countries families receiving early intervention not only have similar but also culturally specific needs. In addition, the data highlight how parents of different cultures experience COPCA®.
Conclusion: The data of the study will facilitate adjustment of family centered early intervention to the needs of families of different cultures. Culturally adapted and needs-based intervention increases the likelihood that early intervention positively influences the well-being of the whole family in this vulnerable phase of life and infant development.
Plasmon confinement in fractal quantum systems
Creators: name: Westerhout, Tom
name: van Veen, Edo
name: Katsnelson, Mikhail I.
name: Yuan, Shengjun
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recent progress in the fabrication of materials has made it possible to create arbitrary non-periodic two-dimensional structures in the quantum plasmon regime. This paves the way for exploring the plasmonic properties of electron gases in complex geometries such as fractals. In this work, we study the plasmonic properties of Sierpinski carpets and gaskets, two prototypical fractals with different ramification, by fully calculating their dielectric functions. We show that the Sierpinski carpet has a dispersion comparable to a square lattice, but the Sierpinski gasket features highly localized plasmon modes with a flat dispersion. This strong plasmon confinement in finitely ramified fractals can provide a novel setting for manipulating light at the quantum scale.
description: 5 pages, 4 figures, comments are welcome
Navigating crises in deindustrialised South Wales
Creators: name: Frigo-Charles, Olivia
Publisher: name: ZHAW Zürcher Hochschule für Angewandte Wissenschaften
Year: 2024
Subjects: Deindustrialisation
Community
South Wales
Crisis
307: Gemeinschaften

description: Residents of deindustrialised communities in South Wales value their hometowns and industrial past in ways that profoundly shape their identities. Their loyalty to these areas is strong, often choosing to stay despite dwindling opportunities. Amidst the socio-economic challenges of industry closures, Brexit, and the cost-of-living crisis, these communities face heightened struggles impacting their well-being and complicating already precarious situations.
TESS Full Frame Image Search for White Dwarf Exoplanets
Creators: name: Aloisi, Robert
name: Vanderburg, Andrew
name: Selep, Patrick
name: Popowicz, Adam
name: Bernacki, Krzysztof
name: Hambsch, Josch
name: Kaye, Thomas G.
name: Oksanen, Arto
name: Rappaport, Saul
Publisher: name: Zenodo
Year: 2021
Subjects: Exoplanet
White Dwarf

description: We are leading a project to identify candidate exoplanets transiting white dwarf (WD) stars by searching TESS Full Frame Images (FFI) at locations of GAIA DR2 WD stars with magnitudes less than 18.0. This effort complements approved high cadence (2 minute or 30 second) observations of selected WD stars using TESS. Typical magnitudes for white dwarf stars with TESS candidate transits are from V 15.0 to 18.0. Typical candidate exoplanet periods may be 30 minutes to 4 days with transits lasting from 2 to 30 minutes. A Python code utilizing LightKurve and box fitting linear least square (BLS) periodograms is being developed to identify promising candidates. Ground-based follow-up with modest size (12” to 20” aperture) telescopes is possible because WD transits are relatively deep. Observations are being completed by an international collaboration. To date, we have found short period (~3 hour), short duration (~20 minutes) transits of small red dwarf stars and even shorter period (40 minutes) sinusoidal signals likely caused by star spots. Future work will include searching TESS FFI at locations of white dwarf stars identified in GAIA EDR3.
Electrically tunable three-dimensional g-factor anisotropy in single InAs self-assembled quantum dots
Creators: name: Takahashi, S.
name: Deacon, R. S.
name: Oiwa, A.
name: Shibata, K.
name: Hirakawa, K.
name: Tarucha, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Three-dimensional anisotropy of the Lande g-factor and its electrical modulation are studied for single uncapped InAs self-assembled quantum dots (QDs). The g-factor is evaluated from measurement of inelastic cotunneling via Zeeman substates in the QD for various magnetic field directions. We find that the value and anisotropy of the g-factor depends on the type of orbital state which arises from the three-dimensional confinement anisotropy of the QD potential. Furthermore, the g-factor and its anisotropy are electrically tuned by a side-gate which modulates the confining potential.
description: 5 pages, 5 figures
Friends and Foes: The Conditional Occurrence of Planetary Companions to Transiting Exoplanets and their Impact on Radial Velocity Follow-up Observations
Creators: name: He, Matthias Y.
name: Ford, Eric B.
name: Ragozzine, Darin
Publisher: name: Zenodo
Year: 2021
Subjects: Exoplanets
Transits
Radial Velocities
Populations
Kepler

description: Population models of Kepler's multi-planet systems have revealed patterns in their underlying architectures, which can be used to make predictions about the presence of additional planets in systems with known transiting planets. I will describe how we use such a model (He et al 2020) to compute the conditional occurrence of planets given a Kepler-detectable planet. While unseen planets may potentially be discovered by radial velocity (RV) follow-up observations, they can also add a source of systematic error in efforts to fit the semi-amplitude (K) of the transiting planet. I will show that measuring the K of the transiting planet when there are an unknown number of planets often requires significantly more observations than in the ideal case (when there are no additional planets). Planets around 10 day periods, common among the TESS planet candidates, with sizes of 1-2 Earth radii and K comparable to the single-measurement RV precision typically require ~100 observations to measure their K to within 20% error, compared to only ~60 observations in the ideal case. These results highlight a previously unaccounted for source of error when measuring the masses of transiting planets with RVs, such as in the follow-up of TESS planets.
WiBall: A Time-Reversal Focusing Ball Method for Indoor Tracking
Creators: name: Zhang, Feng
name: Chen, Chen
name: Wang, Beibei
name: Han, Yi
name: Liu, K. J. Ray
Publisher: name: arXiv
Year: 2017
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: With the development of the Internet of Things technology, indoor tracking has become a popular application nowadays, but most existing solutions can only work in line-of-sight scenarios, or require regular re-calibration. In this paper, we propose WiBall, an accurate and calibration-free indoor tracking system that can work well in non-line-of-sight based on radio signals. WiBall leverages a stationary and location-independent property of the time-reversal focusing effect of radio signals for highly accurate moving distance estimation. Together with the direction estimation based on inertial measurement unit and location correction using the constraints from the floorplan, WiBall is shown to be able to track a moving object with decimeter-level accuracy in different environments. Since WiBall can accommodate a large number of users with only a single pair of devices, it is low-cost and easily scalable, and can be a promising candidate for future indoor tracking applications.
Additional file 1 of Development of EST-SSR markers and association mapping with floral traits in Syringa oblata
Creators: name: Yang, Yunyao
name: He, Ruiqing
name: Zheng, Jian
name: Hu, Zenghui
name: Wu, Jing
name: Leng, Pingsheng
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Figure S1. Principal component analysis of 192 individuals based on 30 EST-SSR markers.
Towards a Self-Extending Parser
Creators: name: Carbonell, Jaime G.
Publisher: name: Carnegie Mellon University
Year: 2007
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: This paper discusses an approach to incremental learning in natural language processing. The technique of projecting and integrating semantic constraints to learn word definitions is analyzed as Implemented in the POLITICS system. Extensions and improvements of this technique are developed. The problem of generalizing existing word meanings and understanding metaphorical uses of words Is addressed In terms of semantic constraint Integration.
Conditions for two-photon interference with coherent pulses
Creators: name: Kim, Yong-Su
name: Slattery, Oliver
name: Kuo, Paulina S.
name: Tang, Xiao
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study the conditions for two-photon classical interference with coherent pulses. We find that the temporal overlap between optical pulses is not required for interference However, coherence within the same inputs is found to be essential for the interference.
description: 5 pages, 4 figures
The bound state solutions of the $D$-dimensional Schrödinger equation for the Woods-Saxon potential
Creators: name: Badalov, V. H.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work, the analytical solutions of the $D$-dimensional Schrödinger equation are studied in great detail for the Wood-Saxon potential by taking advantage of the Pekeris approximation. Within a novel improved scheme to surmount centrifugal term, the energy eigenvalues and corresponding radial wave functions are found for any angular momentum case within the context of the Nikiforov-Uvarov (NU) and Supersymmetric quantum mechanics (SUSYQM) methods. In this way, based on these methods, the same expressions are obtained for the energy eigenvalues, and the expression of radial wave functions transformed each other is demonstrated. In addition, a finite number energy spectrum depending on the depth of the potential $V_{0}$, the radial $n_{r}$ and orbital $l$ quantum numbers and parameters $D, a, R_{0}$ are defined as well.
description: 26 pages, 2 tables, 2 figures. arXiv admin note: substantial text overlap with arXiv:1711.10322, arXiv:1111.4734, arXiv:0905.2731, arXiv:0912.3890; text overlap with arXiv:hep-th/9405029 by other authors
An Automated All-Sky Search for Superflares with TESS
Creators: name: Wallace, Spencer C.
name: Davenport, James R.
name: Gordon, Tyler A.
Publisher: name: Zenodo
Year: 2021
Subjects: Stellar Astrophysics

description: We present the results of an automated search for superflare events using 2 minute light curve data from the first two years of the TESS mission (sectors 1-26). In order to determine the properties of the targets and to measure flare energies, we restrict ourselves to objects which have distance and color measurements from Gaia. Flare events are found by first detrending the light curves using an iterative gaussian process fit and then searching for outliers with a change-point analysis technique. In total, we identify 27,229 flare events from 7,260 different stars. As a byproduct of the gaussian process detrending, we also provide robust rotation period measurements for about 80,000 stars in the sample. We find a decreasing correlation between flare rate and rotation period, and also find a decreasing trend between flare rate and galactic height. Both of these results are consistent with flare rate diminishing with age.
description: {"references": ["Chang, S. W., Byun, Y. I., & Hartman, J. D. 2015, ApJ, 814, 35", "Davenport, J. R. A., Hawley, S. L., Hebb, L., et al. 2014, ApJ, 797, 122", "Davenport, J. R. A., & Covey, K. R. 2018, ApJ, 868, 151"]}
title: ADCO, Deuxième cartulaire ou Grand cartulaire de l'abbaye de Molesme, Cart. 143 (7 H 7), 153 fol, f. 0152r
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2009
name: Petot, Frédéric
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: cartulaire
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge

description: Deuxième cartulaire ou Grand cartulaire de l'abbaye de Molesme, Archives départementales de la Côte-d'Or, Cart. 143 (7 H 7), 153 fol, f. 0152r, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Deuxième cartulaire ou Grand cartulaire de l'abbaye de Molesme, Archives départementales de la Côte-d'Or, Cart. 143 (7 H 7), 153 fol, f. 0152r, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb137389344
description: Provenance: abbaye de Molesme
description: Provenance: http://www.wikidata.org/entity/Q334044
How well do we understand cosmological recombination?
Creators: name: Wong, Wan Yan
name: Moss, Adam
name: Scott, Douglas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The major theoretical limitation for extracting cosmological parameters from the CMB sky lies in the precision with which we can calculate the cosmological recombination process. Uncertainty in the details of hydrogen and helium recombination could effectively increase the errors or bias the values of the cosmological parameters derived from the Planck satellite, for example. Here we modify the cosmological recombination code RECFAST by introducing one more parameter to reproduce the recent numerical results for the speed-up of the helium recombination. Together with the existing hydrogen fudge factor, we vary these two parameters to account for the remaining dominant uncertainties in cosmological recombination. By using the CosmoMC code with Planck forecast data, we find that we need to determine the parameters to better than ten per cent for He I and one per cent for H, in order to obtain negligible effects on the cosmological parameters. For helium recombination, if the existing studies have calculated the ionization fraction to the 0.1 per cent level by properly including the relevant physical processes, then we already have numerical calculations which are accurate enough for Planck. For hydrogen, setting the fudge factor to speed up low redshift recombination by 14 per cent appears to be sufficient for Planck. However, more work still needs to be done to carry out comprehensive numerical calculations of all the relevant effects for hydrogen, as well as to check for effects which couple hydrogen and helium recombinaton through the radiation field.
description: 6 pages, 6 figures; Paper revised according to the reviewer's suggestions. An updated RECFAST (version 1.4) available at http://www.astro.ubc.ca/people/scott/recfast.html
Generation of the relic neutrino asymmetry in a hot plasma of the early Universe
Creators: name: Semikoz, Victor B.
name: Dvornikov, Maxim
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The neutrino asymmetry in the early universe plasma, $n_ν- n_{\bar ν}$, is calculated both before and after the electroweak phase transition (EWPT). In the Standard Model before EWPT, the leptogenesis is well known to be driven by the abelian anomaly in a massless hypercharge field. The generation of the neutrino asymmetry in the Higgs phase after EWPT, in its turn, has not been considered previously because of the absence of any quantum anomaly in an external electromagnetic field for such electroneutral particles as neutrino, unlike the Adler-Bell-Jackiw anomaly for charged left and right polarized massless electrons in the same electromagnetic field. Using the neutrino Boltzmann equation, modified by the Berry curvature term in the momentum space, we establish the violation of the macroscopic neutrino current in plasma after EWPT and exactly reproduce the nonconservation of the lepton current in the symmetric phase before EWPT arising in quantum field theory due to the nonzero lepton hypercharge and corresponding triangle anomaly in an external hypercharge field. In the last case, the non-conservation of the lepton current is derived through the kinetic approach without a computation of corresponding Feynman diagrams. Then the new kinetic equation is applied for the calculation of the neutrino asymmetry accounting for the Berry curvature and the electroweak interaction with background fermions in the Higgs phase. Such an interaction generates a neutrino asymmetry through the electroweak coupling of neutrino currents with electromagnetic fields in plasma, which is $\sim G_\mathrm{F}^2$. It turns out that this effect is especially efficient for maximally helical magnetic fields.
description: 18 pages in LaTeX2e, 4 eps figures; based on talk given on the 3rd International Conference on Particle Physics and Astrophysics ICPPA-2017 (October 2-5, 2017, Moscow, Russia); to be published in the special issue of Int.J.Mod.Phys.D
Towards a Notion of Quantitative Security Analysis
Creators: name: Iliano Cervesato
Publisher: name: Carnegie Mellon University
Year: 1995
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: The traditional Dolev-Yao model of security limits attacks to “computationally feasible” operations. We depart from this model by assigning a cost to protocol actions, both of the Dolev-Yao kind as well as non traditional forms such as computationally-hard operations, guessing, principal subversion, and failure. This quantitative approach enables evaluating protocol resilience to various forms of denial of service, guessing attacks, and resource limitation. While the methodology is general, we demonstrate it through a low-level variant of the MSR specification language.
Region of Interest (ROI) Coding for Aerial Surveillance Video using AVC & HEVC
Creators: name: Meuel, Holger
name: Kluger, Florian
name: Ostermann, Jörn
Publisher: name: arXiv
Year: 2018
Subjects: subject: Image and Video Processing (eess.IV)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Aerial surveillance from Unmanned Aerial Vehicles (UAVs), i.e. with moving cameras, is of growing interest for police as well as disaster area monitoring. For more detailed ground images the camera resolutions are steadily increasing. Simultaneously the amount of video data to transmit is increasing significantly, too. To reduce the amount of data, Region of Interest (ROI) coding systems were introduced which mainly encode some regions in higher quality at the cost of the remaining image regions. We employ an existing ROI coding system relying on global motion compensation to retain full image resolution over the entire image. Different ROI detectors are used to automatically classify a video image on board of the UAV in ROI and non-ROI. We propose to replace the modified Advanced Video Coding (AVC) video encoder by a modified High Efficiency Video Coding (HEVC) encoder. Without any change of the detection system itself, but by replacing the video coding back-end we are able to improve the coding efficiency by 32% on average although regular HEVC provides coding gains of 12-30% only for the same test sequences and similar PSNR compared to regular AVC coding. Since the employed ROI coding mainly relies on intra mode coding of new emerging image areas, gains of HEVC-ROI coding over AVC-ROI coding compared to regular coding of the entire frames including predictive modes (inter) depend on sequence characteristics. We present a detailed analysis of bit distribution within the frames to explain the gains. In total we can provide coding data rates of 0.7-1.0 Mbit/s for full HDTV video sequences at 30 fps at reasonable quality of more than 37 dB.
description: 5 pages, 7 figures, 1 table
Undergraduate Research in the Time of COVID: TESS Follow-Up Observations at Austin College's Adams Observatory
Creators: name: Baker, David
name: Cutting, Neil
name: Luker, Lindy
name: O'Dwyer, Tanner
name: Schnaible, Chloe
name: Skinner, Brett
Publisher: name: Zenodo
Year: 2021
Subjects: Exoplanets
TESS
Photometry
Undergraduate Research

description: The TESS Follow-Up Observing Program (TFOP) provides an extraordinary opportunity for undergraduates to gain experience in astronomy research. Austin College is a small liberal arts college in Texas with a strong track record of undergraduate scientific research, and the Adams Observatory at Austin College has delivered TFOP Sub-Group 1 (SG1) photometric observations since 2018. However, the global COVID-19 pandemic placed unique challenges on our exoplanet research program, forcing a completely remote experience in 2020 and a hybrid environment in 2021. Here we report results from our 2020-21 TFOP research filled with verified planet candidates, false positives, and rewarding collaborations in the time of COVID.
description: {"references": ["Collins, Karen (2019). 2019AAS...23314 005C", "Jensen, Eric (2013). ASCL, 2013ascl.soft6007J", "Collins, Karen et al. (2017). AJ 153:77", "Akeson, Rachel et al. (2019). 2019AAS...23314009A.", "Rodriguez, Joseph E. et al. (2021), AJ 161:194"]}
Observation of electronic inhomogeneity and charge density wave in a bilayer La$_{1.36}$Sr$_{1.64}$Mn$_2$O$_7$ single crystal
Creators: name: Kim, Jeehoon
name: Huang, Junwei
name: Zhou, J. -S.
name: Goodenough, J. B.
name: Mitchell, J. F.
name: de Lozanne, Alex
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We employed a scanning tunneling microscope to image the (001) surface topography and local density of states (LDOS) in La$_{2-2x}$Sr$_{1+2x}$Mn$_2$O$_7$ (x=0.32, LSMO) single crystals below the Curie temperature (T$_C$ = 120 K). The LDOS maps revealed a stripe-like modulation propagating along the tetragonal a axis with a wavelength of about 1.6 Å, which is indicative of a charge density wave (CDW). The observed CDW in the x=0.32 sample is far from the Fermi surface nesting instability as compared with the data of angle resolved photoemission spectroscopy in an x=0.40 sample. The stripe model developed previously for cuprates can explain the observed CDW in our LSMO sample, indicating that competing interactions between localized and itinerant phases are the origin of the spatial modulations present intrinsically in cuprates and manganites.
title: 03_0894
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Towards a Large Scale Concept Ontology for Broadcast Video
Creators: name: Hauptmann, Alexander
Publisher: name: Carnegie Mellon University
Year: 2010
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Earlier this year, a major effort was initiated to study the theoretical and empirical aspects of the automatic detection of semantic concepts in broadcast video, complementing ongoing research in video analysis, the TRECVID video analysis evaluations by the National Institute of Standards (NIST) in the U.S., and MPEG-7 standardization. The video analysis community has long struggled to bridge the gap from successful, low-level feature analysis (color histograms, texture, shape) to semantic content description of video. One approach is to utilize a set of intermediate textual descriptors that can be reliably applied to visual scenes (e.g. outdoors, faces, animals). If we can define a rich enough set of such intermediate descriptors in the form of large lexicons and taxonomic classification schemes, then robust and general-purpose semantic content annotation and retrieval will be enabled through these descriptors.
Towards Generalized Mirror Symmetry for Twisted Connected Sum $G_2$ Manifolds
Creators: name: Braun, Andreas P.
name: Del Zotto, Michele
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We revisit our construction of mirror symmetries for compactifications of Type II superstrings on twisted connected sum $G_2$ manifolds. For a given $G_2$ manifold, we discuss evidence for the existence of mirror symmetries of two kinds: one is an autoequivalence for a given Type II superstring on a mirror pair of $G_2$ manifolds, the other is a duality between Type II strings with different chiralities for another pair of mirror manifolds. We clarify the role of the B-field in the construction, and check that the corresponding massless spectra are respected by the generalized mirror maps. We discuss hints towards a homological version based on BPS spectroscopy. We provide several novel examples of smooth, as well as singular, mirror $G_2$ backgrounds via pairs of dual projecting tops. We test our conjectures against a Joyce orbifold example, where we reproduce, using our geometrical methods, the known mirror maps that arise from the SCFT worldsheet perspective. Along the way, we discuss non-Abelian gauge symmetries, and argue for the generation of the Affleck-Harvey-Witten superpotential in the pure SYM case.
description: are welcome. 75 pages, 5 figures
The ACS Fornax Cluster Survey. II. The Central Brightness Profiles of Early-Type Galaxies: A Characteristic Radius on Nuclear Scales and the Transition from Central Luminosity Deficit to Excess
Creators: name: Cote, Patrick
name: Ferrarese, Laura
name: Jordan, Andres
name: Blakeslee, John P.
name: Chen, Chin-Wei
name: Infante, Leopoldo
name: Merritt, David
name: Mei, Simona
name: Peng, Eric W.
name: Tonry, John L.
name: West, Andrew A.
name: West, Michael J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyse HST surface brightness profiles for 143 early-type galaxies in the Virgo and Fornax Clusters. Sersic models provide accurate descriptions of the global profiles with a notable exception: the observed profiles deviate systematically inside a characteristic "break" radius of R_b ~ 0.02R_e where R_e is the effective radius of the galaxy. The sense of the deviation is such that bright galaxies (M_B < -20) typically show central light deficits with respect to the inward extrapolation of the Sersic model, while the great majority of low- and intermediate-luminosity galaxies (-19.5 < M_B < -15) show central light excesses; galaxies occupying a narrow range of intermediate luminosities (-20 < M_B < -19.5) are usually well fitted by Sersic models over all radii. The slopes of the central surface brightness profiles, when measured at fixed fractions of R_e, vary smoothly as a function of galaxy luminosity in a manner that depends sensitively on the choice of measurement radius. We show that a recent claim of strong bimodality in slope is likely an artifact of the galaxy selection function used in that study. To provide a more robust characterization of the inner regions of galaxies, we introduce a parameter that describes the central luminosity deficit or excess relative to the inward extrapolation of the outer Sersic model. We find that this parameter varies smoothly over the range of ~ 720 in blue luminosity spanned by the Virgo and Fornax sample galaxies, with no evidence for a dichotomy. We argue that the central light excesses (nuclei) in M_B > -19 galaxies may be the analogs of the dense central cores that are predicted by some numerical simulations to form via gas inflows. (ABRIDGED)
description: To appear in the Astrophysical Journal, December 2007. Full resolution paper available at http://www.cfa.harvard.edu/~ajordan/ACSFCS/Home.html
Local and global dynamics of warped astrophysical discs
Creators: name: Ogilvie, Gordon I.
name: Latter, Henrik N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Astrophysical discs are warped whenever a misalignment is present in the system, or when a flat disc is made unstable by external forces. The evolution of the shape and mass distribution of a warped disc is driven not only by external influences but also by an internal torque, which transports angular momentum through the disc. This torque depends on internal flows driven by the oscillating pressure gradient associated with the warp, and on physical processes operating on smaller scales, which may include instability and turbulence. We introduce a local model for the detailed study of warped discs. Starting from the shearing sheet of Goldreich & Lynden-Bell, we impose the oscillating geometry of the orbital plane by means of a coordinate transformation. This warped shearing sheet (or box) is suitable for analytical and computational treatments of fluid dynamics, magnetohydrodynamics, etc., and it can be used to compute the internal torque that drives the large-scale evolution of the disc. The simplest hydrodynamic states in the local model are horizontally uniform laminar flows that oscillate at the orbital frequency. These correspond to the nonlinear solutions for warped discs found in previous work by Ogilvie, and we present an alternative derivation and generalization of that theory. In a companion paper we show that these laminar flows are often linearly unstable, especially if the disc is nearly Keplerian and of low viscosity. The local model can be used in future work to determine the nonlinear outcome of the hydrodynamic instability of warped discs, and its interaction with others such as the magnetorotational instability.
description: 17 pages, 10 figures, revised version, to be published in MNRAS
Multi-Dimensional Double Detonation of Sub-Chandrasekhar Mass White Dwarfs
Creators: name: Moll, Rainer
name: Woosley, Stanford E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using 2D and 3D simulation, we study the "robustness" of the double detonation scenario for Type Ia supernovae, in which a detonation in the helium shell of a carbon-oxygen white dwarf induces a secondary detonation in the underlying core. We find that a helium detonation cannot easily descend into the core unless it commences (artificially) well above the hottest layer calculated for the helium shell in current presupernova models. Compressional waves induced by the sliding helium detonation, however, robustly generate hot spots which trigger a detonation in the core. Our simulations show that this is true even for non-axisymmetric initial conditions. If the helium is ignited at multiple points, the internal waves can pass through one another or be reflected, but this added complexity does not defeat the generation of the hot spot. The ignition of very low-mass helium shells depends on whether a thermonuclear runaway can simultaneously commence in a sufficiently large region.
description: 14 pages, 11 figures, accepted for publication in ApJ on July 22, 2013
Excitation of the Uller-Zenneck electromagnetic surface waves in the prism-coupled configuration
Creators: name: Rasheed, Mehran
name: Faryad, Muhammad
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A configuration to excite the Uller-Zenneck surface electromagnetic waves at the planar interfaces of homogeneous and isotropic dielectric materials is proposed and theoretically analyzed. The Uller-Zenneck waves are surface waves that can exist at the planar interface of two dissimilar dielectric materials of which at least one is a lossy dielectric material. In this work, a slab of a lossy dielectric material was taken with lossless dielectric materials on both sides. A canonical boundary-value problem was set up and solved to find the possible Uller-Zenneck waves and waveguide modes. The Uller-Zenneck waves guided by the slab of the lossy dielectric material were found to be either symmetric or anti-symmetric that transmuted into waveguide modes when the thickness of that slab was increased. A prism-coupled configuration was then successfully devised to excite the Uller-Zenneck waves. The results showed that the Uller-Zenneck waves are excited at the same angle of incidence for any thickness of the slab of the lossy dielectric material, whereas the waveguide modes can be excited when the slab is sufficiently thick. The excitation of Uller-Zenneck waves at the planar interfaces with homogeneous and all-dielectric materials can usher new avenues for the applications for electromagnetic surface waves.
Chemical Abundances in the Leading Arm of the Magellanic Stream
Creators: name: Fox, Andrew J.
name: Barger, Kathleen A.
name: Wakker, Bart P.
name: Richter, Philipp
name: Antwi-Danso, Jacqueline
name: Casetti-Dinescu, Dana I.
name: Howk, J. Christopher
name: Lehner, Nicolas
name: D'Onghia, Elena
name: Crowther, Paul A.
name: Lockman, Felix J.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Leading Arm (LA) of the Magellanic Stream is a vast debris field of H I clouds connecting the Milky Way and the Magellanic Clouds. It represents an example of active gas accretion onto the Galaxy. Previously only one chemical abundance measurement had been made in the LA. Here we present chemical abundance measurements using Hubble Space Telescope/Cosmic Origins Spectrograph Green Bank Telescope spectra of four sightlines passing through the LA, and three nearby sightlines that may trace outer fragments of the LA. We find low oxygen abundances, ranging from 4.0(+4.0,-2.0) percent solar to 12.6(+6.2,-4.1) percent solar, in the confirmed LA directions, with the lowest values found in the region known as LA III, farthest from the LMC. These abundances are substantially lower than the single previous measurement, S/H=35+/-7 percent solar (Lu et al. 1998), but are in agreement with those reported in the SMC filament of the trailing Stream, supporting a common origin in the SMC (not the LMC) for the majority of the LA and the trailing Stream. This provides important constraints for models of the formation of the Magellanic System. Finally, the HVCs in two of the three nearby sightlines show H I columns, kinematics, and oxygen abundances consistent with LA membership. This suggests that the LA is larger than traditionally thought, extending at least 20 degrees further to the Galactic northwest.
description: Accepted for publication in ApJ, 14 pages, 3 figures
Towards a general scientific reasoning engine
Creators: name: Carbonell, Jaime G.(Jaime Guillermo)
name: Larkin, Jill H.
name: F  Reif
Publisher: name: Carnegie Mellon University
Year: 1989
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Computer Science Department