cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Study of the X-ray activity of Sgr A* during the 2011 XMM-Newton campaign
Creators: name: Mossoux, Enmanuelle
name: Grosso, Nicolas
name: Vincent, Frédéric H.
name: Porquet, Delphine
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In Spring 2011 we observed Sgr A*, the supermassive black hole at the center of our Galaxy, with XMM-Newton with a total exposure of ~226 ks in coordination with the 1.3 mm VLBI. We have performed timing analysis of the X-ray emission from Sgr A* using Bayesian blocks algorithm to detect X-ray flares observed with XMM-Newton. Furthermore, we computed X-ray smoothed light curves observed in this campaign in order to have better accuracy on the position and the amplitude of the flares. We detected 2 X-ray flares on the 2011 March 30 and April 3 which have for comparison a peak detection level of 6.8 and 5.9 sigma in the XMM-Newton/EPIC light curve in the 2-10 keV energy range with a 300 s bin. The former is characterized by 2 sub-flares: the first one is very short (~458 s) with a peak luminosity of ~9.4E34 erg/s whereas the second one is longer (~1542 s) with a lower peak luminosity of ~6.8E34 erg/s. The comparison with the sample of X-ray flares detected during the 2012 Chandra XVP campaign favors the hypothesis that the 2011 March 30 flare is a single flare rather than 2 distinct sub-flares. We model the light curve of this flare with the gravitational lensing of a simple hotspot-like structure but we can not satisfactorily reproduce the large decay of the light curve between the 2 sub-flares with this model. From magnetic energy heating during the rise phase of the first sub-flare and assuming an X-ray photons production efficiency of 1 and a magnetic field of 100 G at 2 r_g, we derive an upper limit to the radial distance of the first sub-flare of 100 r_g. We estimate using the decay phase of the first sub-flare a lower limit to the radial distance of 4 r_g from synchrotron cooling in the infrared. The X-ray emitting region of the first sub-flare is located at a radial position of 4-100 and has a corresponding radius of 1.8-2.87 in r_g unit for a magnetic field of 100 G at 2 r_g.
description: Version published in A&A + corrigendum published in A&A
Maximal variation of curves on K3 surfaces
Creators: name: Dutta, Yajnaseni
name: Huybrechts, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We prove that curves in a non-primitive, base point free, ample linear system on a K3 surface have maximal variation. The result is deduced from general restriction theorems applied to the tangent bundle. We also show how to use specialisation to spectral curves to deduce information about the variation of curves contained in a K3 surface more directly. The situation for primitive linear systems is not clear at the moment. However, the maximal variation holds in genus two and can, in many cases, be deduced from a recent result of van Geemen and Voisin confirming a conjecture due to Matsushita.
description: 19 pages. Comments welcome. Proper credit to the work of Ciliberto, Dedieu and Sernesi added
Investigating layer specific activation of pain modulation
Creators: name: Pfaffenrot, Viktor
name: Bingel, Ulrike
name: Balint Kincses
name: Dr. Tamas Spisak
name: Koopmans, Peter
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Social and Behavioral Sciences
subject: attentional analgesia
subject: laminar fMRI
subject: layer fMRI
subject: pain modulation

description: see attached document
title: Le tradizioni africane alla prova della globalizzazione. Note sull’interculturalità in Africa
Creators: name: Lumembu Kasanda , Albert
Publisher: name: Roma Tre-Press
Year: 2009

description: Le riflessioni contenute nel contributo si articolano in tre parti, che si interpellano e si sviluppano reciprocamente. Si tratta di tre paradigmi fondamentali tramite cui è trattato il processo delle tradizione africane: la negazione, la riabilitazione e la sfida della globalizzazione. Le due prime parti costituiscono una rapida sintesi del discorso sulle tradizioni africane a partire dai contesti della colonizzazione e della modernità, della lotta per le indipendenze e l'affermazione di sé. L'ultima parte si focalizza sulla sfida della globalizzazione attuale alla capacità di resistenza e di integrazione delle tradizioni africane.

description: B@belonline vol. 6 Incontro con la filosofia africana
Minuscule Schubert varieties: Poset polytopes, PBW-degenerated Demazure modules, and Kogan faces
Creators: name: Biswal, Rekha
name: Fourier, Ghislain
Publisher: name: arXiv
Year: 2014
Subjects: subject: Representation Theory (math.RT)
subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05E10, 14M25, 14M1, 17B10

description: We study a family of posets and the associated chain and order polytopes. We identify the order polytope as a maximal Kogan face in a Gelfand-Tsetlin polytope of a multiple of a fundamental weight. We show that the character of such a Kogan face equals to the character of a Demazure module which occurs in the irreducible representation of $\mathfrak{sl}_n$ having highest weight multiple of fundamental weight and for any such Demazure module there exists a corresponding poset and associated maximal Kogan face. We prove that the chain polytope parametrizes a monomial basis of the associated PBW-graded Demazure module and further, that the Demazure module is a favourable module, e.g. interesting geometric properties are governed by combinatorics of convex polytopes. Thus, we obtain for any minuscule Schubert variety a flat degeneration into a toric projective variety which is projectively normal and arithmetically Cohen-Macaulay. We provide a necessary and sufficient condition on the Weyl group element such that the toric variety associated to the chain polytope and the toric variety associated to the order polytope are isomorphic.
description: 20 pages, final version
Community-led Open Publication Infrastructures for Monographs (COPIM)
Creators: name: Adema, Janneke
Publisher: name: Zenodo
Year: 2019
Subjects: COPIM
books
monographs
open access
infrastructures
ecosystem

description: Invited Talk, Community-led Open Infrastructures for Monographs (COPIM), UK Research and Innovation Open Access Review Workshop on monographs and book chapters, Friday 13 September, London, UK.
Inflationary tensor fossils in large-scale structure
Creators: name: Dimastrogiovanni, Emanuela
name: Fasiello, Matteo
name: Jeong, Donghui
name: Kamionkowski, Marc
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Inflation models make specific predictions for a tensor-scalar-scalar three-point correlation, or bispectrum, between one gravitational-wave (tensor) mode and two density-perturbation (scalar) modes. This tensor-scalar-scalar correlation leads to a local power quadrupole, an apparent departure from statistical isotropy in our Universe, as well as characteristic four-point correlations in the current mass distribution in the Universe. So far, the predictions for these observables have been worked out only for single-clock models in which certain consistency conditions between the tensor-scalar-scalar correlation and tensor and scalar power spectra are satisfied. Here we review the requirements on inflation models for these consistency conditions to be satisfied. We then consider several examples of inflation models, such as non-attractor and solid inflation models, in which these conditions are put to the test. In solid inflation the simplest consistency conditions are already violated whilst in the non-attractor model we find that, contrary to the standard scenario, the tensor-scalar-scalar correlator probes directly relevant model-dependent information. We work out the predictions for observables in these models. For non-attractor inflation we find an apparent local quadrupolar departure from statistical isotropy in large-scale structure but that this power quadrupole decreases very rapidly at smaller scales. The consistency of the CMB quadrupole with statistical isotropy then constrains the distance scale that corresponds to the transition from the non-attractor to attractor phase of inflation to be larger than the currently observable horizon. Solid inflation predicts clustering fossils signatures in the current galaxy distribution that may be large enough to be detectable with forthcoming, and possibly even current, galaxy surveys.
description: 28 pages, 3 figures, version matching the one published in JCAP plus additional typos fixed
THE SPECIALTY OF HISTORIC DEVELOPMENT OF ECONOMIC ANALYSIS AND ITS IMPORTANCE IN CUSTOMS SPHERE
Creators: name: Muydinova, Zilola
Publisher: name: Zenodo
Year: 2023

description: The article provides the basis of Economic Analysis, its theoretical foundations and stages of development, as well as the importance and relevance of economic analysis in the implementation of effective and simplified customs control and clearance in the activities of customs authorities at present.
Relaxation Deferred Correction Methods and their Applications to Residual Distribution Schemes
Creators: name: Abgrall, Rémi
name: Mélédo, Elise Le
name: Öffner, Philipp
name: Torlo, Davide
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In [1] is proposed a simplified DeC method, that, when combined with the residual distribution (RD) framework, allows to construct a high order, explicit FE scheme with continuous approximation avoiding the inversion of the mass matrix for hyperbolic problems. In this paper, we close some open gaps in the context of deferred correction (DeC) and their application within the RD framework. First, we demonstrate the connection between the DeC schemes and the RK methods. With this knowledge, DeC can be rewritten as a convex combination of explicit Euler steps, showing the connection to the strong stability preserving (SSP) framework. Then, we can apply the relaxation approach introduced in [2] and construct entropy conservative/dissipative DeC (RDeC) methods, using the entropy correction function proposed in [3]. [1] R. Abgrall. High order schemes for hyperbolic problems using globally continuous approximation and avoiding mass matrices. Journal of Scientific Computing, 73(2):461--494, Dec 2017. [2] D. Ketcheson. Relaxation Runge--Kutta methods: Conservation and stability for inner-product norms. SIAM Journal on Numerical Analysis, 57(6):2850--2870, 2019. [3] R. Abgrall. A general framework to construct schemes satisfying additional conservation relations. application to entropy conservative and entropy dissipative schemes. Journal of Computational Physics, 372:640--666, 2018.
Holomorphy without Supersymmetry in the Standard Model Effective Field Theory
Creators: name: Alonso, Rodrigo
name: Jenkins, Elizabeth E.
name: Manohar, Aneesh V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The anomalous dimensions of dimension-six operators in the Standard Model Effective Field Theory (SMEFT) respect holomorphy to a large extent. The holomorphy conditions are reminiscent of supersymmetry, even though the SMEFT is not a supersymmetric theory.
description: Minor corrections in Table I, see note added at end of paper. The complete SMEFT RGE will be maintained at http://einstein.ucsd.edu/smeft
title: Evaluation of AgroZ Hermetic Storage Bag against insect pests on stored maize
Creators: name: Mutambuki, Kimondo
name: Likhayo, Paddy
name: Mbugua, John
name: Warigia, T.
Publisher: name: Julius-Kühn-Institut
Year: 2018

description: A study on AgroZ airtight bag was conducted against two major storage insects under simulated farmers' storage practice. Two (2) lots of 50kg white maize of Pioneer variety were put into AgroZ bag and polypropylene woven bag to serve as a control. Four replications of each bag type were used. In each bag, 50 adults of unsexed larger grain borer, Prostephanus truncatus, and maize weevil, Sitophilus zeamais, each were introduced. AgroZ bag had one liner placed inside polypropylene bag to provide support and handling convenience. Each liner had been tested for air tightness before use. The AgroZ bags were securely tied to ensure airtightness thus leading to a hermetic environment. The bags were then randomly placed in a barn on pallets in a randomised complete design (RCD). Sampling was done every 4 weeks up to 24 weeks. A 500g sample was initially taken using a compartmented long spear probe from each bag for baseline data, and subsequent ones at 4, 8, 12, 20 and 24 weeks. Repeated sampling from the same storage device reflected farmer practices of opening the device at regular intervals to draw grain for use as household food. Gas analysis in AgroZ bags showed oxygen level dropping rapidly to 7% within 4 weeks and later increased gradually to 10% at 12 weeks. Conversely, carbon dioxide level increased sharply to 10% and declined gradually to 9% over the same period. The number of insects and percentage damaged grains between AgroZ bag and polypropylene bag significantly differed from 12th week to 24th week. AgroZ bag outperformed the polypropylene bag commonly used by farmers and conveniently protected maize from insect infestation within the 6-month storage period.
description: Julius-Kühn-Archiv, Nr. 463, Vol.1 (2018): Proceedings of the 12th International Working Conference on Stored Product Protection (IWCSPP) in Berlin, Germany, October 7-11, 2018
The Ring of Polyfunctions over $\mathbb Z/n\mathbb Z$
Creators: name: Specker, Ernst
name: Hungerbühler, Norbert
name: Wasem, Micha
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: Commutative Algebra (math.AC)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: We study the ring of polyfunctions over $\mathbb Z/n\mathbb Z$. The ring of polyfunctions over a commutative ring $R$ with unit element is the ring of functions $f:R\to R$ which admit a polynomial representative $p\in R[x]$ in the sense that $f(x)= p(x)$ for all $x\in R$. This allows to define a ring invariant $s$ which associates to a commutative ring $R$ with unit element a value in $\mathbb N\cup\{\infty\}$. The function $s$ generalizes the number theoretic Smarandache function. For the ring $R=\mathbb Z/n\mathbb Z$ we provide a unique representation of polynomials which vanish as a function. This yields a new formula for the number $Ψ(n)$ of polyfunctions over $\mathbb Z/n\mathbb Z$. We also investigate algebraic properties of the ring of polyfunctions over $\mathbb Z/n\mathbb Z$. In particular, we identify the additive subgroup of the ring and the ring structure itself. Moreover we derive formulas for the size of the ring of polyfunctions in several variables over $\mathbb Z/n\mathbb Z$, and we compute the number of polyfunctions which are units of the ring.
description: 26 pages. Communications in Algebra, 2022
An Induced Representation Method for Studying the Stability of Saturn's Ring
Creators: name: Chakraborty, Soumangsu Bhusan
name: Sen, Siddhartha
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: MacKey constructed a set of induced representation character formulas to calculate the sum of different powers of the eigenvalues of a matrix with finite group symmetry. We show that these results of MacKey can be used to derive the stability condition, m > Cn3, of Maxwell using his symmetric model for a ring of Saturn, as a collection of n identical unit mass particles revolving round Saturn, which has mass m, in a circular orbit.
Does the diversity of individual preferences affects the consensus? The case of the cockroach Periplaneta americana
Creators: name: Martin, Mariano Calvo
name: Eeckhout, Max
name: Jean-Louis Deneubourg
name: Nicolis, Stamatios C.
Publisher: name: figshare
Year: 2020
Subjects: subject: 60801 Animal Behaviour
subject: FOS: Biological sciences
subject: 60201 Behavioural Ecology
subject: 60304 Ethology and Sociobiology

description: How the interplay between social interaction, diversity of preferences among group members and the group size affects the dynamics to reach consensuses.
The Nevanlinna parametrization for $q$-Lommel polynomials in the indeterminate case
Creators: name: Štampach, F.
name: Šťovíček, P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 42C05, 33C47, 33D45

description: The Hamburger moment problem for the $q$-Lommel polynomials which are related to the Hahn-Exton $q$-Bessel function is known to be indeterminate for a certain range of parameters. In this paper, the Nevanlinna parametrization for the indeterminate case is provided in an explicit form. This makes it possible to describe all N-extremal measures of orthogonality. Moreover, a linear and quadratic recurrence relation are derived for the moment sequence, and the asymptotic behavior of the moments for large powers is obtained with the aid of appropriate estimates.
description: 28 pages
Towards the uniqueness of Lifshitz black holes and solitons in New Massive Gravity
Creators: name: Ayón-Beato, Eloy
name: Hassaïne, Mokhtar
name: Juárez-Aubry, María Montserrat
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We prove that the z=1 and z=3 Lifshitz black hole solutions of New Massive Gravity in three dimensions are the only static axisymmetric solutions that can be cast in a Kerr-Schild form with a seed metric given by the Lifshitz spacetime. Correspondingly, we study the issue of uniqueness of Lifshitz solitons when considering an ansatz involving a single metric function. We show this problem can be mapped to the previous one and that the z=1 and z=1/3 Lifshitz soliton solutions are the only ones within this class. Finally, our approach suggests for the first time an explanation as to what is special about those particular values of the dynamical critical exponent z at finite temperature.
description: 10 pages, 5 figures
Supernova neutrinos and the turbulence power spectrum: point source statistics
Creators: name: Kneller, James P.
name: Kabadi, Neel V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The neutrinos emitted from the proto-neutron star created in a core-collapse supernova must run through a significant amount of turbulence before exiting the star. Turbulence can modify the flavor evolution of the neutrinos imprinting itself upon the signal detected here at Earth. The turbulence effect upon individual neutrinos, and the correlation between pairs of neutrinos, might exhibit sensitivity to the power spectrum of the turbulence and recent analysis of the turbulence in a two-dimensional hydrodynamical simulation of a core-collapse supernova indicates the power spectrum may not be the Kolmogorov 5/3 inverse power law as has been previously assumed. In this paper we study the effect of non-Kolmogorov turbulence power spectra upon neutrinos from a point source as a function of neutrino energy and turbulence amplitude at a fixed post-bounce epoch. We find the two effects of turbulence upon the neutrinos - the distorted phase effect and the stimulated transitions - both possess strong and weak limits in which dependence upon the power spectrum is absent or evident respectively. Since neutrinos of a given energy will exhibit these two effects at different epochs of the supernova each with evolving strength, we find there is sensitivity to the power spectrum present in the neutrino burst signal from a Galactic supernova.
description: Matches version accepted by PRD
A Splitting Scheme for Flip-Free Distortion Energies
Creators: name: Stein, Oded
name: Li, Jiajin
name: Solomon, Justin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences
subject: I.3; I.3.5; G.1.6

description: We introduce a robust optimization method for flip-free distortion energies used, for example, in parametrization, deformation, and volume correspondence. This method can minimize a variety of distortion energies, such as the symmetric Dirichlet energy and our new symmetric gradient energy. We identify and exploit the special structure of distortion energies to employ an operator splitting technique, leading us to propose a novel Alternating Direction Method of Multipliers (ADMM) algorithm to deal with the non-convex, non-smooth nature of distortion energies. The scheme results in an efficient method where the global step involves a single matrix multiplication and the local steps are closed-form per-triangle/per-tetrahedron expressions that are highly parallelizable. The resulting general-purpose optimization algorithm exhibits robustness to flipped triangles and tetrahedra in initial data as well as during the optimization. We establish the convergence of our proposed algorithm under certain conditions and demonstrate applications to parametrization, deformation, and volume correspondence.
description: For supplemental material, see odedstein.com/projects/flip-free-parametrization
Identifying Cover Songs Using Information-Theoretic Measures of Similarity
Creators: name: Foster, Peter
name: Dixon, Simon
name: Klapuri, Anssi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: This paper investigates methods for quantifying similarity between audio signals, specifically for the task of of cover song detection. We consider an information-theoretic approach, where we compute pairwise measures of predictability between time series. We compare discrete-valued approaches operating on quantised audio features, to continuous-valued approaches. In the discrete case, we propose a method for computing the normalised compression distance, where we account for correlation between time series. In the continuous case, we propose to compute information-based measures of similarity as statistics of the prediction error between time series. We evaluate our methods on two cover song identification tasks using a data set comprised of 300 Jazz standards and using the Million Song Dataset. For both datasets, we observe that continuous-valued approaches outperform discrete-valued approaches. We consider approaches to estimating the normalised compression distance (NCD) based on string compression and prediction, where we observe that our proposed normalised compression distance with alignment (NCDA) improves average performance over NCD, for sequential compression algorithms. Finally, we demonstrate that continuous-valued distances may be combined to improve performance with respect to baseline approaches. Using a large-scale filter-and-refine approach, we demonstrate state-of-the-art performance for cover song identification using the Million Song Dataset.
description: 13 pages, 5 figures, 4 tables. v3: Accepted version
Nonparametric regression with responses missing at random and the scale depending on auxiliary covariates
Creators: name: Jiang, Tian
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Space Science
subject: Medicine
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Plant Biology
subject: FOS: Biological sciences

description: Nonparametric regression with missing at random (MAR) responses, univariate regression component of interest, and the scale function depending on both the predictor and auxiliary covariates, is considered. The asymptotic theory suggests that both heteroscedasticity and MAR mechanism affect the sharp constant of the minimax mean integrated squared error (MISE) convergence. Our sharp minimax procedure is based on the estimation of unknown nuisance scale function, design density and availability likelihood. The estimator is adaptive to the missing mechanism and unknown smoothness of the estimated regression function. Simulation studies and real examples also justify practical feasibility of the proposed method for this complex regression setting.
Soliton scattering as a measurement tool for weak signals
Creators: name: Soloviev, Igor I.
name: Klenov, Nikolay V.
name: Pankratov, Andrey L.
name: Revin, Leonid S.
name: Il'ichev, Evgeniy
name: Kuzmin, Leonid S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have considered relativistic soliton dynamics governed by the sine-Gordon equation and affected by short spatial inhomogeneities of the driving force and thermal noise. Developed analytical and numerical methods for calculation of soliton scattering at the inhomogeneities allowed us to examine the scattering as a measurement tool for sensitive detection of polarity of the inhomogeneities. We have considered the superconducting fluxonic ballistic detector as an example of the device in which the soliton scattering is utilized for quantum measurements of superconducting flux qubit. We optimized the soliton dynamics for the measurement process varying the starting and the stationary soliton velocity as well as configuration of the inhomogeneities. For experimentally relevant parameters we obtained the signal-to-noise ratio above 100 reflecting good practical usability of the measurement concept.
description: 9 pages, 5 figures
Entanglement in non-critical inhomogeneous quantum chains
Creators: name: de Buruaga, Nadir Samos Sáenz
name: Santalla, Silvia N.
name: Rodríguez-Laguna, Javier
name: Sierra, Germán
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study an inhomogeneous critical Ising chain in a transverse field whose couplings decay exponentially from the center. In the strong inhomogeneity limit we apply Fisher's renormalization group to show that the ground state is formed by concentric singlets similar to those of the rainbow state of the XX model. In the weak inhomogeneity limit we map the model to a massless Majorana fermion living in a hyperbolic spacetime, where, using CFT techniques, we derive the entanglement entropy that is violated linearly. We also study an inhomogeneous non-critical Ising model that for weak inhomogeneity is mapped to a massive Majorana fermion, while for strong inhomogeneity regime it exhibits trivial and non-trivial topological phases and a separation between regions with high and low entanglement. We also present the entanglement Hamiltonian of the model.
description: 18 pages, 11 figures, 6 appendices
Προσδιορισμός ναρκωτικών και φαρμάκων σε μεταθανάτια δείγματα οστών
Creators: name: Θωμά, Ιωάννα Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2024
Subjects: Οστά
Δείγματα
Τεχνικές Ανάλυσης
Postmortem bone samples
LC/MS-MS
Drugs

description: Στη μελέτη αυτή, μέσω βιβλιογραφικής ανασκόπησης, αξιολογήθηκε η καταλληλότητα τεχνικών προκατεργασίας δειγμάτων και αναλυτικών τεχνικών, στην ανίχνευση και ποσοτικοποίηση ναρκωτικών ουσών σε μεταθανάτια δείγματα οστών. Παράλληλα εξετάστηκε και η σταθερότητα των ουσιών στα οστά, ως εναλλακτικό βιολογικό δείγμα, σε συνάρτηση με το χρόνο. Σύμφωνα με τα αποτελέσματα της μελέτης αυτής, όσο αφορά την σταθερότητα των ουσιών στα οστά, διαπιστώθηκε ότι οι αμφεταμίνες, τα αντικαταθλιπτικά, τα αντιψυχωσικά και οι βενζοδιαζεπίνες (κυρίως διαζεπάμη και νορδιαζεπάμη), έχουν μεγάλη σταθερότητα ενώ η κοκαΐνη και τα οπιούχα παρουσιάζουν μικρότερη σταθερότητα. Τα κανναβινοειδή όμως, σύμφωνα με την βιβλιογραφία, δεν μπορούν να ανιχνευτούν στα οστά εύκολα, κι έτσι η ανίχνευσή τους γίνεται κυρίως στα σωματικά υγρά. Από την ενδελεχή ανασκόπηση της σχετικής βιβλιογραφίας προέκυψε ότι η καταλληλότερη τεχνική ανάλυσης, η οποία εφαρμόστηκε και έδωσε πολύ καλά και αξιόπιστα αποτελέσματα, είναι η LC-MS/MS. Συγκεκριμένα, αυτή η μέθοδος είχε την υψηλότερη ευαισθησία και τα χαμηλότερα όρια ανίχνευσης σε σχέση με οποιαδήποτε άλλη μέθοδο που έχει εφαρμοστεί. Επομένως, η LC-MS/MS μπορεί να εφαρμοστεί μελλοντικά σε θανατηφόρα περιστατικά που τα μόνα μεταθανάτια δείγματα για τοξικολογική ανάλυση είναι σκελετικά υπολείμματα, ώστε η εξέταση αυτή να συνδράμει στον προσδιορισμό της αιτίας θανάτου.
description: In this study, through a literature review, the suitability of sample pretreatment techniques and analytical techniques was evaluated for the detection and quantification of drugs in postmortem bone samples. Additionally, the stability of the substances in bones, as an alternative biological sample, was examined over time. According to the results of this study, regarding the stability of substances in bones, it was found that amphetamines, antidepressants, antipsychotics, and benzodiazepines (mainly diazepam and nordiazepam) have high stability, while cocaine and opioids present lower stability. However, cannabinoids, according to the literature, cannot be easily detected in bones, so their detection is primarily carried out in bodily fluids. From a thorough review of the relevant literature, it emerged that the most suitable analytical technique, which was applied and provided very good and reliable results, is LC-MS/MS. Specifically, this method had the highest sensitivity and the lowest detection limits compared to any other method that has been applied. Therefore, LC-MS/MS can be applied in the future to fatal cases where the only postmortem samples available for toxicological analysis are skeletal remains, so that this examination can contribute to determining the cause of death.
Reference Class Selection in Similarity-Based Forecasting of Sales Growth
Creators: name: Theising, Etienne
name: Wied, Dominik
name: Ziggel, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Applications (stat.AP)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: This paper proposes a general method to handle forecasts exposed to behavioural bias by finding appropriate outside views, in our case corporate sales forecasts of analysts. The idea is to find reference classes, i.e. peer groups, for each analyzed company separately that share similarities to the firm of interest with respect to a specific predictor. The classes are regarded to be optimal if the forecasted sales distributions match the actual distributions as closely as possible. The forecast quality is measured by applying goodness-of-fit tests on the estimated probability integral transformations and by comparing the predicted quantiles. The method is out-of-sample backtested on a data set consisting of 21,808 US firms over the time period 1950 - 2019, which is also descriptively analyzed. It appears that in particular the past operating margins are good predictors for the distribution of future sales. A case study compares the outside view of our distributional forecasts with actual analysts' forecasts and emphasizes the relevance of our approach in practice.
description: 37 pages, 7 figures
title: La filosofia africana e la questione di genere
Creators: name: Tshibilondi Ngoyi , Albertine
Publisher: name: Roma Tre-Press
Year: 2009

description: Nel complesso delle preoccupazioni che incombono sui filosofi africani figura anche la riflessione sul genere. Questa problematica, a lungo considerata come un tema minore, interpella ormai i pensatori africani, innanzitutto proprio per la presa di coscienza delle stesse donne africane, negli assalti della mondializzazione. Si tratta di rendere conto dello statuto reale della donna nella situazione africana da una prospettiva insieme filosofica e antropologica, e di promuovere la sua integrazione come soggetto e controparte dell'uomo nel processo di sviluppo o di liberazione del Continente. Se le concezioni, le funzioni e le correnti della filosofia africana sono molteplici, ci pronunciamo qui a favore di un pensiero critico, emancipatore, che rompa col fallocentrismo, partecipi alla trasformazione delle mentalità e aiuti a riscoprire la dignità della donna.

description: B@belonline vol. 6 Incontro con la filosofia africana
A note on colored HOMFLY polynomials for hyperbolic knots from WZW models
Creators: name: Gu, Jie
name: Jockers, Hans
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Geometric Topology (math.GT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Using the correspondence between Chern-Simons theories and Wess-Zumino-Witten models we present the necessary tools to calculate colored HOMFLY polynomials for hyperbolic knots. For two-bridge hyperbolic knots we derive the colored HOMFLY invariants in terms of crossing matrices of the underlying Wess-Zumino-Witten model. Our analysis extends previous works by incorporating non-trivial multiplicities for the primaries appearing in the crossing matrices, so as to describe colorings of HOMFLY invariants beyond the totally symmetric or anti-symmetric representations of SU(N). The crossing matrices directly relate to 6j-symbols of the quantum group U_q(su(N)). We present powerful methods to calculate such quantum 6j-symbols for general N. This allows us to determine previously unknown colored HOMFLY polynomials for two-bridge hyperbolic knots. We give explicitly the HOMFLY polynomials colored by the representation {2,1} for two-bridge hyperbolic knots with up to eight crossings. Yet, the scope of application of our techniques goes beyond knot theory; e.g., our findings can be used to study correlators in Wess-Zumino-Witten conformal field theories or -- in the limit to classical groups -- to determine color factors for Yang Mills amplitudes.
description: 72 pages, 15 figures; v2: explicit HOMFLY polynomials for more knots included, refs. added and typos corrected; v3: Appendix with sample calculation added
On Gorenstein Fano Threefolds with an Action of a Two-Dimensional Torus
Creators: name: Bäuerle, Andreas
name: Hausen, Jürgen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14J26, 14L30

description: We classify the non-toric, $\mathbb Q$-factorial, Gorenstein, log terminal Fano threefolds of Picard number one that admit an effective action of a two-dimensional algebraic torus.
title: Impact of rodent infestation on availability, safety and nutritional value of maize stored on-farm in lowland tropical zone of Kenya
Creators: name: Mutungi, Christopher
name: Edoh-Ognakossan, K.
name: Affognon, H.
Publisher: name: Julius-Kühn-Institut
Year: 2018

description: Julius-Kühn-Archiv, Nr. 463, Vol.1 (2018): Proceedings of the 12th International Working Conference on Stored Product Protection (IWCSPP) in Berlin, Germany, October 7-11, 2018
Tidally distorted barytropes and their Roche limits, with application to WASP-12b
Creators: name: Antonetti, Victoria
name: Goodman, Jeremy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The hot Jupiter WASP-12b has been found to be on a decaying 1.09-day orbit. The mean density of the planet inferred from transit and radial-velocity data is near its Roche limit; just how near depends on the planet's uncertain internal structure. There is also spectroscopic evidence of mass loss. We accurately calculate the Roche density on the assumption of a synchronously rotating $n=1$ polytrope, and find this to be only $15-20\%$ below the observational estimates for the mean density. We discuss the implied shape of the planet, its lifetime before complete disruption, and its current rate of mass loss based on our improved tidal model. The present mass-loss rate is at least as sensitive to the opacity and temperature profiles of the planet's atmosphere as to its internal structure, however.
Perceptions of synchronous movement
Creators: name: Cross, Emily S.
name: Moffat, Ryssa
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Social Psychology
subject: Cognition and Perception
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology
subject: Comparative Psychology
subject: aesthetic appreciation
subject: interpersonal motor coordination
subject: mirror game
subject: motor synchrony
subject: perception

description: Previous research suggests that humans are not reliable judges of the amount of synchrony between individuals who are moving their bodies, but that the presence of more synchronicity enhanced how much the observers enjoyed watching the movements. This study aims to ascertain whether humans really are poor judges of synchrony, or successful quantification of synchrony is dependent on kinematic features of the movement, aesthetic judgements made by the perceiver, or perhaps even perceiver traits.
Interacting Dirac liquid in three-dimensional semimetals
Creators: name: Hofmann, Johannes
name: Barnes, Edwin
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study theoretically the properties of the interacting Dirac liquid, a novel three-dimensional many-body system which was recently experimentally realized and in which the electrons have a chiral linear relativistic dispersion and a mutual Coulomb interaction. We find that the "intrinsic" Dirac liquid, where the Fermi energy lies exactly at the nodes of the band dispersion, displays unusual Fermi liquid properties similar to graphene, whereas the "extrinsic" system with finite detuning or doping behaves as a standard Landau Fermi liquid. We present analytical and numerical results for the self-energy and spectral function based on both Hartree-Fock and the random phase approximation (RPA) theories and compute the quasiparticle lifetime, residue, and renormalized Fermi velocity of the extrinsic Dirac liquid. A full numerical calculation of the extrinsic RPA spectral function indicates that the Fermi liquid description breaks down for large-energy excitations. Furthermore, we find an additional plasmaron quasiparticle sideband in the spectral function which is discontinuous around the Fermi energy. Our predictions should be observable in ARPES and STM measurements.
description: 9 pages, 4 figures
Decoherence of interacting Majorana modes
Creators: name: Ng, H. T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the decoherence of Majorana modes of a fermion chain, where the fermions interact with their nearest neighbours. We investigate the effect of dissipation and dephasing on the Majorana modes of a fermionic chain. The dissipative and dephasing noises induce the non-parity- and parity-preserving transitions between the eigenstates of the system, respectively. Therefore, these two types of noises lead to the different decoherence mechanisms. In each type of noise, we discuss the low- and high-frequency regimes to describe the different environments. We numerically calculate the dissipation and dephasing rates in the presence of long-range interactions. We find that the decoherence rate of interacting Majorana modes is different to that of non-interacting modes. We show the examples that the long-range interactions can reduce the decoherence rate. It is advantageous to the potential applications of quantum information processing.
description: 11 pages, 14 figures
A maximum entropy copula model for mixed data: representation, estimation and applications
Creators: name: Mukhopadhyay, Subhadeep
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Mathematical Sciences not elsewhere classified
subject: Marine Biology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: A new nonparametric model of maximum-entropy (MaxEnt) copula density function is proposed, which offers the following advantages: (i) it is valid for mixed random vector. By ‘mixed’, we mean the method works for any combination of discrete or continuous variables in a fully automated manner; (ii) it yields a bonafide density estimate with intepretable parameters. By ‘bonafide’, we mean the estimate guarantees to be a non-negative function, integrates to 1; and (iii) it plays a unifying role in our understanding of a large class of statistical methods for mixed (X,Y). Our approach utilises modern machinery of nonparametric statistics to represent and approximate log-copula density function via LP-Fourier transform. Several real-data examples are also provided to explore the key theoretical and practical implications of the theory.
On the mixed-twist construction and monodromy of associated Picard-Fuchs systems
Creators: name: Malmendier, Andreas
name: Schultz, Michael T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14J27, 14J28, 14D05, 33C60

description: We use the mixed-twist construction of Doran and Malmendier to obtain a multi-parameter family of K3 surfaces of Picard rank $ρ\ge 16$. Upon identifying a particular Jacobian elliptic fibration on its general member, we determine the lattice polarization and the Picard-Fuchs system for the family. We construct a sequence of restrictions that lead to extensions of the polarization by two-elementary lattices. We show that the Picard-Fuchs operators for the restricted families coincide with known resonant hypergeometric systems. Second, for the one-parameter mirror families of deformed Fermat hypersurfaces we show that the mixed-twist construction produces a non-resonant GKZ system for which a basis of solutions in the form of absolutely convergent Mellin-Barnes integrals exists whose monodromy we compute explicitly.
description: 40 pages
Table Top Orientation to the Galapagos Islands and Finches
Creators: name: Donovan, Sam
name: Jungck, John
Publisher: name: QUBES Educational Resources
Year: 2022

description: The Galapagos Finches are one of the most widely recognized examples of evolutionary biology research. This paper and pencil activity provides access to a variety of data resources that can be used to think about the patterns and causal relationships underlying the distribution and other characteristics of the Galapagos Finches.
Nonparametric estimation of risk ratios for bivariate data
Creators: name: Abrams, S.
name: Janssen, P.
name: Swanepoel, J.
name: Veraverbeke, N.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Marine Biology
subject: Mental Health
subject: Virology

description: Inspired by the cross-ratio proposed by Clayton, we study a new risk ratio to describe the relation between the components of the random vector (T1,T2). It is the ratio of the conditional hazard rate function of T1 at t1, given that T2≥t2 and the conditional hazard rate function of T1 at t1, given that T2<t2. A nonparametric estimator is proposed and its asymptotic distribution is obtained using Bernstein smoothing for the survival copula of (T1,T2) and its derivatives. The finite sample performance of the estimator is studied via simulations. The practical use of the risk ratio is illustrated in two real datasets, one on food expenditure and net income and one on the relation between maximum heart rate and age, for patients suffering from heart disease versus control patients (no heart disease). Extensions of the proposed risk ratio are given in the discussion section.
GOODS-HERSCHEL: star formation, dust attenuation and the FIR-radio correlation on the Main Sequence of star-forming galaxies up to z~4
Creators: name: Pannella, Maurilio
name: Elbaz, David
name: Daddi, Emanuele
name: Dickinson, Mark E.
name: Hwang, Ho Seong
name: Schreiber, Corentin
name: Strazzullo, Veronica
name: Aussel, Herve
name: Bethermin, Matthieu
name: Buat, Veronique
name: Charmandaris, Vassilis
name: Cibinel, Anna
name: Juneau, Stephanie
name: Ivison, Rob J.
name: Borgne, Damien Le
name: Floc'h, Emeric Le
name: Leiton, Roger
name: Lin, Lihwai
name: Magdis, Georgios
name: Morrison, Glenn E.
name: Mullaney, James R.
name: Onodera, Masato
name: Renzini, Alvio
name: Salim, Samir
name: Sargent, Mark T.
name: Scott, Douglas
name: Shu, Xinwen
name: Wang, Tao
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use deep panchromatic datasets in the GOODS-N field, from GALEX to the deepest Herschel far-infrared and VLA radio continuum imaging, to explore, using mass-complete samples, the evolution of the star formation activity and dust attenuation of star-forming galaxies to z~4. Our main results can be summarized as follows: i) the slope of the SFR-M correlation is consistent with being constant, and equal to ~0.8 at least up to z~1.5, while its normalization keeps increasing with redshift; ii) for the first time here we are able to explore the FIR-radio correlation for a mass-selected sample of star-forming galaxies: the correlation does not evolve up to z~4; iii) we confirm that galaxy stellar mass is a robust proxy for UV dust attenuation in star-forming galaxies, with more massive galaxies being more dust attenuated, strikingly we find that this attenuation relation evolves very weakly with redshift, the amount of dust attenuation increasing by less than 0.3 magnitudes over the redshift range [0.5-4] for a fixed stellar mass, as opposed to a tenfold increase of star formation rate; iv) the correlation between dust attenuation and the UV spectral slope evolves in redshift, with the median UV spectral slope of star-forming galaxies becoming bluer with redshift. By z~3, typical UV slopes are inconsistent, given the measured dust attenuation, with the predictions of commonly used empirical laws. Finally, building on existing results, we show that gas reddening is marginally larger (by a factor of around 1.3) than stellar reddening at all redshifts probed, and also that the amount of dust attenuation at a fixed ISM metallicity increases with redshift. We speculate that our results support evolving ISM conditions of typical star-forming galaxies such that at z~1.5 Main Sequence galaxies have ISM conditions getting closer to those of local starbursts.
description: 19 pages, 12 figure, accepted for publication in ApJ