cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Investigating AGN Heating in a Sample of Nearby Clusters
Creators: name: Dunn, R. J. H.
name: Fabian, A. C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyse those objects in the Brightest 55 sample of clusters of galaxies which have a short central cooling time and a central temperature drop. Such clusters are likely to require some form of heating. Where clear radio bubbles are observed in these clusters, their energy injection is compared to the X-ray cooling rate. Of the 20 clusters requiring heating, at least 14 have clear bubbles, implying a duty cycle for the bubbling activity of at least 70 per cent. The average distance out to which the bubbles can offset the X-ray cooling, r_heat is given by r_heat/r_cool=0.86+/-0.11 where r_cool is defined as the radius as which the radiative cooling time is 3 Gyr. 10 out of 16 clusters have r_heat/r_cool>1, but there is a large range in values. The clusters which require heating but show no clear bubbles were combined with those clusters which have a radio core to form a second sub-sample. Using r_heat=0.86 r_cool we calculate the size of an average bubble expected in these clusters. In five cases (3C129.1, A2063, A2204, A3112 and A3391) the radio morphology is bi-lobed and its extent similar to the expected bubble sizes. A comparison between the actual bubble size and the maximum expected if they were to offset the X-ray cooling exactly, R_max, shows a peak at R_bubble ~ 0.7 R_max with a tail extending to larger R_bubble/R_max. The offset from the expected value of R_bubble ~ R_max may indicate the presence of a non-thermal component in the innermost ICM of most clusters, with a pressure comparable to the thermal pressure.
description: 14 pages, 15 figures, accepted for publication in MNRAS
Calculation of the B_{c}leptonic decay constant using the shifted N-expansion method
Creators: name: Ikhdair, Sameer M.
name: Sever, Ramazan
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We give a review and present a comprehensive calculation for the leptonic constant B_{c} of the low-lying pseudoscalar and vector states of B_{c}-meson in the framework of static and QCD-motivated nonrelativistic potential models taking into account the one-loop and two-loop QCD corrections in the short distance coefficient that governs the leptonic constant of $B_{c}$ quarkonium system. Further, we use the scaling relation to predict the leptonic constant of the nS-states of the (b_bar)c system. Our results are compared with other models to gauge the reliability of the predictions and point out differences.
description: 26 pages
EvoSplit: An evolutionary approach to split a multi-label data set into disjoint subsets
Creators: name: Florez-Revuelta, Francisco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: This paper presents a new evolutionary approach, EvoSplit, for the distribution of multi-label data sets into disjoint subsets for supervised machine learning. Currently, data set providers either divide a data set randomly or using iterative stratification, a method that aims to maintain the label (or label pair) distribution of the original data set into the different subsets. Following the same aim, this paper first introduces a single-objective evolutionary approach that tries to obtain a split that maximizes the similarity between those distributions independently. Second, a new multi-objective evolutionary algorithm is presented to maximize the similarity considering simultaneously both distributions (labels and label pairs). Both approaches are validated using well-known multi-label data sets as well as large image data sets currently used in computer vision and machine learning applications. EvoSplit improves the splitting of a data set in comparison to the iterative stratification following different measures: Label Distribution, Label Pair Distribution, Examples Distribution, folds and fold-label pairs with zero positive examples.
Local Symmetries and Order-Disorder Transitions in Small Macroscopic Wigner Islands
Creators: name: Coupier, Gwennou
name: Guthmann, Claudine
name: Noat, Yves
name: Jean, Michel Saint
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The influence of local order on the disordering scenario of small Wigner islands is discussed. A first disordering step is put in evidence by the time correlation functions and is linked to individual excitations resulting in configuration transitions, which are very sensitive to the local symmetries. This is followed by two other transitions, corresponding to orthoradial and radial diffusion, for which both individual and collective excitations play a significant role. Finally, we show that, contrary to large systems, the focus that is commonly made on collective excitations for such small systems through the Lindemann criterion has to be made carefully in order to clearly identify the relative contributions in the whole disordering process.
description: 14 pages, 10 figures
Standardizing reverberation-measured Mg II time-lag quasars, by using the radius-luminosity relation, and constraining cosmological model parameters
Creators: name: Khadka, Narayan
name: Yu, Zhefu
name: Zajaček, Michal
name: Martinez-Aldama, Mary Loli
name: Czerny, Bożena
name: Ratra, Bharat
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use 78 reverberation-measured Mg II time-lag quasars (QSOs) in the redshift range $0.0033 \leq z \leq 1.89$ to constrain cosmological parameters in six different cosmological models. The basis of our method is the use of the radius-luminosity or $R-L$ relation to standardize these 78 Mg II QSOs. In each cosmological model we simultaneously determine $R-L$ relation and cosmological model parameters, thus avoiding the circularity problem. We find that the $R-L$ relation parameter values are independent of the cosmological model used in the analysis thus establishing that current Mg II QSOs are standardizable candles. Cosmological constraints obtained using these QSOs are significantly weaker than, but consistent with, those obtained from a joint analysis of baryon acoustic oscillation (BAO) observations and Hubble parameter [$H(z)$] measurements. So, we also analyse these QSOs in conjunction with the BAO + $H(z)$ data and find cosmological constraints consistent with the standard spatially-flat $Λ$CDM model as well as with mild dark energy dynamics and a little spatial curvature. A larger sample of higher-quality reverberation-measured QSOs should have a smaller intrinsic dispersion and so should provide tighter constraints on cosmological parameters.
description: 16 pages, 11 figure, Mg II QSO data are given, MNRAS accepted version. arXiv admin note: text overlap with arXiv:2105.12692
Photometric Classifications of Evolved Massive Stars: Preparing for the Era of Webb and Roman with Machine Learning
Creators: name: Dorn-Wallenstein, Trevor Z.
name: Davenport, James R. A.
name: Huppenkothen, Daniela
name: Levesque, Emily M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In the coming years, next-generation space-based infrared observatories will significantly increase our samples of rare massive stars, representing a tremendous opportunity to leverage modern statistical tools and methods to test massive stellar evolution in entirely new environments. Such work is only possible if the observed objects can be reliably classified. Spectroscopic observations are infeasible with more distant targets, and so we wish to determine whether machine learning methods can classify massive stars using broadband infrared photometry. We find that a Support Vector Machine classifier is capable of coarsely classifying massive stars with labels corresponding to hot, cool, and emission line stars with high accuracy, while rejecting contaminating low mass giants. Remarkably, 76\% of emission line stars can be recovered without the need for narrowband or spectroscopic observations. We classify a sample of ${\sim}2500$ objects with no existing labels, and identify fourteen candidate emission line objects. Unfortunately, despite the high precision of the photometry in our sample, the heterogeneous origins of the labels for the stars in our sample severely inhibits our classifier from distinguishing classes of stars with more granularity. Ultimately, no large and homogeneously labeled sample of massive stars currently exists. Without significant efforts to robustly classify evolved massive stars -- which is feasible given existing data from large all-sky spectroscopic surveys -- shortcomings in the labeling of existing data sets will hinder efforts to leverage the next-generation of space observatories.
description: 23 pages, 16 figures, 6 tables. Accepted for publication in ApJ. Comments welcome
Texto: A paca e a bosta
Creators: name: Tamuxi, Luiz
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: Manoki language

description: Luíz Tamuxi conta a anedota de quando caçaram uma paca que tinha comido uma bosta.
Luíz Tamuxi tells an anecdote about hunting a paca that had eaten human excrement.
Μαθηματική Παιδαγωγική Γνώση στην Προσχολική Εκπαίδευση: Η περίπτωση των κανονικοτήτων
Creators: name: Καρασαββίδου, Μαριάνθη Ιωακείμ
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Μαθηματική Παιδαγωγική Γνώση
Εκπαιδευτικοί Προσχολικής Ηλικίας
Κανονικότητες
Mathematical Content Knowledge
Preschool Teachers
Patterns

description: Στόχος της παρούσας έρευνας είναι η διερεύνηση της μαθηματικής παιδαγωγικής γνώσης που κατέχουν δεκαπέντε εκπαιδευτικοί προσχολικής ηλικίας για τις κανονικότητες. Συγκεκριμένα, διερευνάται η γνώση τους για το περιεχόμενο, για τις μαθησιακές ικανότητες και δυσκολίες των παιδιών και οι παιδαγωγικές στρατηγικές και πρακτικές τους. Για το σκοπό αυτό, πραγματοποιήθηκαν ατομικές συνεντεύξεις με τους εκπαιδευτικούς τα αποτελέσματα των οποίων έδειξαν ότι το μεγαλύτερο ποσοστό των εκπαιδευτικών έχει μια επιφανειακή εικόνα για το περιεχόμενο των κανονικοτήτων, λίγοι προσπαθούν να συνδέσουν τις κανονικότητες με τα μαθηματικά, υπερεκτιμούν τις ικανότητες των παιδιών, δεν έχουν πλήρη επίγνωση των δυσκολιών που αυτά αντιμετωπίζουν και οι πρακτικές τους αφορούν σε τυπικές δράσεις χωρίς να οδηγούν τα παιδιά στην κατάκτηση της μαθηματικής έννοιας.
description: This study elaborates on the mathematical content knowledge of fifteen preschool teachers and specifically on their knowledge about the content, the children’s abilities and difficulties and their pedagogical strategies and practices. For this purpose, one-by-one interviews were conducted with the teachers and the results showed that the majority of them have a general perspective regarding the content of patterns, few try to link patterns with mathematics and they overestimate the children’s abilities. Furthermore, they are not aware enough concerning the difficulties that children face and their practices correspond to typical actions that are not appropriate for the children to capture the mathematical concept.
The X-ray Properties of Optically-Selected Galaxy Clusters
Creators: name: Dai, Xinyu
name: Kochanek, Christopher S.
name: Morgan, Nicholas D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We stacked the X-ray data from the ROSAT All Sky Survey for over 4,000 clusters selected from the 2MASS catalog and divided into five richness classes. We detected excess X-ray emission over background at the center of the stacked images in all five richness bins. The interrelationships between the mass, X-ray temperature and X-ray luminosity of the stacked clusters agree well with those derived from catalogs of X-ray clusters. Poisson variance in the number of galaxies occupying halos of a given mass leads to significant differences between the average richness at fixed mass and the average mass at fixed richness that we can model relatively easily using a simple model of the halo occupation distribution. These statistical effects probably explain recent results in which optically-selected clusters lie on the same X-ray luminosity-temperature relations as local clusters but have lower optical richnesses than observed for local clusters with the same X-ray properties. When we further binned the clusters by redshift, we did not find significant redshift-dependent biases in the sense that the X-ray luminosities for massive clusters of fixed optical richness show little dependence on redshift beyond that expected from the effects of Poisson fluctuations. Our results demonstrate that stacking of RASS data from optically selected clusters can be a powerful test for biases in cluster selection algorithms.
description: 35 pages, 14 figures, Accepted by ApJ, with updated Lx normalization
Semi-device-independent certification of entanglement in superdense coding
Creators: name: Moreno, George
name: Nery, Ranieri
name: de Gois, Carlos
name: Rabelo, Rafael
name: Chaves, Rafael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Superdense coding is a paradigmatic protocol in quantum information science, employing a quantum communication channel to send classical information more efficiently. As we show here, it can be understood as a particular case of a prepare and measure experiment, a scenario that has attracted growing attention for its fundamental and practical applications. Formulating superdense coding as a prepare and measure scenario allows us to provide a semi-device-independent witness of entanglement that significantly improves over previous tests. Furthermore, we also show how to adapt our results into self-testing of maximally entangled states and also provide a semidefinite program formulation allowing to efficiently optimize, for any shared quantum state, the probability of success in the superdense coding protocol.
Towards a solution of pure Yang-Mills theory in 3+1 dimensions
Creators: name: Freidel, Laurent
name: Leigh, Robert G.
name: Minic, Djordje
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss an analytic approach towards the solution of pure Yang-Mills theory in 3+1 dimensional spacetime. The approach is based on the use of local gauge invariant variables in the Schrödinger representation and the large $N$, planar limit. In particular, within this approach we point out unexpected parallels between pure Yang-Mills theory in 2+1 and 3+1 dimensions. The most important parallel shows up in the analysis of the ground state wave-functional especially in view of the numerical similarity of the existing large N lattice simulations of the spectra of 2+1 and 3+1 Yang Mills theories.
description: 12 pages
Twisted BRST symmetry in gauge theories on $κ$-Minkowski
Creators: name: Mathieu, Philippe
name: Wallet, Jean-Christophe
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Algebraic properties of the BRST symmetry associated to the twisted gauge symmetry occurring in the $κ$-Poincaré invariant gauge theories on the $κ$-Minkowski space are investigated. We find that the BRST operation associated to the gauge invariance of the action functional can be continuously deformed together with its corresponding Leibniz rule, into a nilpotent twisted BRST operation, leading to a twisted BRST symmetry algebra which may be viewed as a noncommutative analog of the usual Yang-Mills BRST algebra.
description: 21 pages. Two references added. To appear in Phys. Rev. D
Texto: As histórias da perdiz e do morcego
Creators: name: Tamuxi, Luiz
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: Manoki language

description: Luíz Tamuxi conta as histórias da perdiz e do morcego em mỹky.
Luíz Tamuxi tells the myths of the bobwhite (Colinus cristatus) and the bat in Mỹky.
Crossover of phase qubit dynamics in presence of negative-result weak measurement
Creators: name: Ruskov, Rusko
name: Mizel, Ari
name: Korotkov, Alexander N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Coherent dynamics of a superconducting phase qubit is considered in the presence of both unitary evolution due to microwave driving and continuous non-unitary collapse due to negative-result measurement. In the case of a relatively weak driving, the qubit dynamics is dominated by the non-unitary evolution, and the qubit state tends to an asymptotically stable point on the Bloch sphere. This dynamics can be clearly distinguished from conventional decoherence by tracking the state purity and the measurement invariant (``murity''). When the microwave driving strength exceeds certain critical value, the dynamics changes to non-decaying oscillations: any initial state returns exactly to itself periodically in spite of non-unitary dynamics. The predictions can be verified using a modification of a recent experiment.
description: 5 pages, 4 eps figures
Testing of Aerosols for Lung Toxicity by In-Vitro Studies at the Air-Liquid Interface for up to 24 Hours
Creators: name: Mülhopt, S.
name: Diabaté, S.
name: Schlager, C.
name: Berger, M.
name: Dilger, M.
name: Krebs, T.
name: Paur, H.-R.
name: Weiss, C.
name: Stapf, D.
Publisher: name: Karlsruhe
Year: 2019

description: The state of the art of studying the health effects of aerosols in vitro is based on submerged exposure of collected particulate matter, suspended in culture medium. However, this method neglects the gas phase including their interactions with particles and cells. It may change the properties of the investigated particles and does not represent the actual process in the human lung. Exposure at the Air-Liquid Interface (ALI) avoids these disadvantages, but requires a comprehensive system to guarantee reproducible conditions. Therefore, KIT and VITROCELL Systems developed a fully automated ALI exposure station. The exposure station offers a complete measurement system for parallel exposure of up to 24 human lung cell cultures towards gases, nanoparticles and complex mixtures such as combustion aerosols. The aerosol flow, temperature, and humidity are adjusted to the conditions resembling the human lung. An internal negative control using humidified synthetic air is also implemented and the particle dose per time can be increased by electrostatic particle deposition. The particle mass per area deposited by diffusional as well as by electrostatic mechanism is monitored online using a quartz crystal microbalance. Additionally, a new tool to reproducibly expose sample grids for transmission electron microscopy was developed and applied. Image evaluation of TEM images delivers dose information with respect to the spatial distribution and the agglomeration state of the deposited particles. Applications of the ALI exposure station are environmental atmospheres and technical emission sources like marine diesel engines or wood combustion. Long-term stability of A549 lung cells was examined for exposure times up to 24 hours by exposing A549 cell cultures towards clean air as well as towards airborne titanium dioxide and copper oxide nanoparticles. Dose measurement data and biological responses as viability (AlamarBlue assay), cytotoxicity (LDH release), and release of cytokines during long-term exposure are reported.
title: 'New-found methods and . . . compounds strange' : reading the 1640 Poems: Written by Wil. Shake-speare. Gent.
Creators: name: Acker, Faith D.
Publisher: name: University of St Andrews
publisherIdentifier: https://ror.org/02wn5qz54
publisherIdentifierScheme: ROR
Year: 2012

description: The second edition of Shakespeare’s sonnets, titled Poems: Written by Wil. Shake-Speare, Gent, and published by stationer John Benson in 1640, was a text typical of its time. In an effort to update the old-fashioned sonnet sequence in which its contents had first reached print, the compiler or editor of the Bensonian version rearranged the poems from the earlier quarto text, adding titles and other texts thought to have been written by or about the sonnets’ author. The immediate reception of the 1640 Poems was a quiet one, but the volume’s contents and structure served as the foundation for more than half of the editions of Shakespeare’s sonnets produced in the eighteenth century. In part due to the textual instability created by the presence of two disparate arrangements of the collection, Shakespeare’s sonnets served only as supplements to the preferred Shakespearean canon from 1709 to 1790. When, at the end of the century, the sonnets finally entered the canon in Edmond Malone’s groundbreaking edition of the plays and poems together, Benson’s version was quickly overshadowed by the earlier text, which was preferred as both more authorial and, due to Malone’s careful critical readings, autobiographical. In contrast to the many scholars since Malone who have overlooked or denigrated the Poems of 1640, this thesis studies the second edition of Shakespeare’s sonnets within the framework of the early modern culture that produced it, arguing that Benson’s edition provides valuable evidence about the editorial habits and literary preferences of the individuals and culture for which it was originally intended.
Supplementary Materials from Bonobos respond aversively to unequal reward distributions
Creators: name: Radovanovic, Kia
name: Lorskens, Anoek
name: Schütte, Sebastian
name: Bräuer, Juliane
name: Call, Josep
name: Haun, Daniel B. M.
name: van Leeuwen, Edwin J. C.
Publisher: name: The Royal Society
Year: 2025
Subjects: classificationCode: 310901
subject: Animal behaviour

description: Supplementary information on methods and results
Smooth Bubbling Geometries Without Supersymmetry
Creators: name: Bah, Ibrahima
name: Heidmann, Pierre
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct the first smooth bubbling geometries using the Weyl formalism. The solutions are obtained from Einstein theory coupled to a two-form gauge field in six dimensions with two compact directions. We classify the charged Weyl solutions in this framework. Smooth solutions consist of a chain of Kaluza-Klein bubbles that can be neutral or wrapped by electromagnetic fluxes, and are free of curvature and conical singularities. We discuss how such topological structures are prevented from gravitational collapse without struts. When embedded in type IIB, the class of solutions describes D1-D5-KKm solutions in the non-BPS regime, and the smooth bubbling solutions have the same conserved charges as a static four-dimensional non-extremal Cvetic-Youm black hole.
description: 34 pages + Appendices, 9 figures, v2 published version
Technicolor contribution to lepton + photon + missing energy events at the Tevatron
Creators: name: Zerwekh, A. R.
name: Dib, C. O.
name: Rosenfeld, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Events with one lepton, one photon and missing energy are the subject of recent searches at the Fermilab Tevatron. We compute possible contributions to these type of events from the process p pbar --> photon l nu_l nu_tau nubar_tau, where l=e,mu in the context of a Low Scale Technicolor Model. We find that with somewhat tighter cuts than the ones used in the CDF search, it could be possible to either confirm or exclude this model in a small region of its parameter space.
description: 4 pages, 3 figures. Improved text and figures, including comments and new references
Creatine phosphokinase: in vitro activity modification and proteolysis with calpain
Creators: name: Arthur, Gavin D.
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of this study was to determine if the muscle isoform of the energy transmitting kinase; Creatine Phosphokinase (CPK - EC N° 2.7.3.2) MM-isozyme, is a substrate for calcium activated neutral protease (CANP - EC N° 3.4.22.17). CPK activity was measured under three different conditions: (1) control assay; (2) with 5mM Ca²⁺,(5x10⁻³Ca²⁺j; (3) with 5mM Ca²⁺ and a range of CANP amounts from 10 to lOOug. 5mM Ca²⁺ consistently caused significant inhibition of the CPK activity to 36% of control (p <0.05). In the presence of 5mM Ca²⁺ and lOug of CANP, CPK activity was not significantly different from the control activity. With 27ug CANP there was a slight but significant activation of CPK to 123.18 + 12.9% above the control activity (p <0.05). As the amount of CANP present was increased to 54, 67, 84 and lOOug, the CPK activity was reduced to 56.96 + 0,31%, 50.46 + 2.65%, 36.06 + 0.5%, and 2.08 + 2.56% respectively. SDS-PAGE showed that significant proteolysis of CPK occurred with a range of CANP from 10 to 3Oug. Densitometric scanning of the CPK band and the 28kDa CANP subunit showed that proteolysis of CPK was dependent on the amount of CANP present. The proteolysis of CPK resulted in the formation of two large fragments. The molecular weight of these proteolytic fragments were estimated to be 38 and 35kDa. The results of this study show that CPK is a substrate for CANP in vitro and that minor proteolysis results in activation of CPK, while increased proteolysis results in loss of activity.
Phantom Bethe roots in the integrable open spin $1/2$ $XXZ$ chain
Creators: name: Zhang, Xin
name: Klümper, Andreas
name: Popkov, Vladislav
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate special solutions to the Bethe Ansatz equations (BAE) for open integrable $XXZ$ Heisenberg spin chains containing phantom (infinite) Bethe roots. The phantom Bethe roots do not contribute to the energy of the Bethe state, so the energy is determined exclusively by the remaining regular excitations. We rederive the phantom Bethe roots criterion and focus on BAE solutions for mixtures of phantom roots and regular (finite) Bethe roots. We prove that in the presence of phantom Bethe roots, all eigenstates are split between two invariant subspaces, spanned by chiral shock states. Bethe eigenstates are described by two complementary sets of Bethe Ansatz equations for regular roots, one for each invariant subspace. The respective "semi-phantom" Bethe vectors are states of chiral nature, with chirality properties getting less pronounced when more regular Bethe roots are added. For the easy plane case "semi-phantom" Bethe states carry nonzero magnetic current, and are characterized by quasi-periodic modulation of the magnetization profile, the most prominent example being the spin helix states (SHS). We illustrate our results investigating "semi-phantom" Bethe states generated by one regular Bethe root (the other Bethe roots being phantom), with simple structure of the invariant subspace, in all details. We obtain the explicit expressions for Bethe vectors, and calculate the simplest correlation functions, including the spin-current for all the states in the single particle multiplet.
description: 18 pages, 3 figures
Η επίδραση του ενωσιακού δικαίου στη δικονομική αρχιτεκτονική των κρατών μελών: Έλεγχος συνταγματικότητας των νόμων και δικαίωμα αποτελεσματικής δικαστικής προστασίας
Creators: name: Γαμπά, Δήμητρα Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Δικονομική αυτονομία
Έλεγχος συνταγματικότητας
Αποτελεσματική δικαστική προστασία
Procedural autonomy
Constitutional review
Effective judicial protection

description: This paper has a double objective: Firstly, to show the relationship between the Greek system of constitutional review and the system of legislative review based on EU law. We will attempt to demonstrate that the Greek constitutional review system is basically in accordance with EU guidelines. The second objective is to present the impact of EU law on the right to effective judicial protection enjoyed. The risk of the effectiveness of the judicial protection of rights deriving from EU law and the principle of equivalence constitute the limits of the procedural autonomy of the Member States. In this context, it is necessary to mention a number of areas where the impact of EU law on the right to judicial protection is already well known and of great importance and also some current developments in administrative procedure that highlights the close link between national and EU legal system.
description: Η παρούσα εργασία έχει έναν διπλό στόχο: Πρώτον, να ανιχνεύσει την σχέση του ελληνικού συστήματος ελέγχου της αντί-συνταγματικότητας των νόμων σε σχέση με τον έλεγχο αντίθεσης που επιβάλλει το δίκαιο της Ένωσης. Δεύτερη στόχευση αποτελεί η παρουσίαση της επίδρασης του ενωσιακού δικαίου στη δικαστική προστασία που απολαμβάνουν οι διοικούμενοι. H διακινδύνευση της αποτελεσματικότητας της δικαστικής προστασίας των δικαιωμάτων που πηγάζουν από το ενωσιακό δίκαιο, καθώς και η αρχή της ισοδυναμίας αποτελούν τα όρια της δικονομικής αυτονομίας των κρατών μελών. Σε αυτό το πλαίσιο κρίνεται απαραίτητο να αναφερθούν αφενός ορισμένοι τομείς, όπου η επίδραση του ενωσιακού δικαίου στο δικαίωμα δικαστικής προστασίας είναι πρόδηλη και, αφετέρου, σύγχρονές εξελίξεις της διοικητικής κατά βάση δίκης που αναδεικνύουν τους στενούς συνδέσμους μεταξύ εθνικής και ενωσιακής έννομης τάξης στο δικονομικό πεδίο.
Algorithms for algebraic path properties in concurrent systems of constant treewidth components
Creators: name: Chatterjee, Krishnendu
name: Ibsen-Jensen, Rasmus
name: Goharshady, Amir
name: Pavlogiannis, Andreas
Publisher: name: IST Austria
Year: 2015
Subjects: 000 Computer science, knowledge & general works

description: We study algorithmic questions for concurrent systems where the transitions are labeled from a complete, closed semiring, and path properties are algebraic with semiring operations. The algebraic path properties can model dataflow analysis problems, the shortest path problem, and many other natural problems that arise in program analysis. We consider that each component of the concurrent system is a graph with constant treewidth, a property satisfied by the controlflow graphs of most programs. We allow for multiple possible queries, which arise naturally in demand driven dataflow analysis. The study of multiple queries allows us to consider the tradeoff between the resource usage of the one-time preprocessing and for each individual query. The traditional approach constructs the product graph of all components and applies the best-known graph algorithm on the product. In this approach, even the answer to a single query requires the transitive closure (i.e., the results of all possible queries), which provides no room for tradeoff between preprocessing and query time. Our main contributions are algorithms that significantly improve the worst-case running time of the traditional approach, and provide various tradeoffs depending on the number of queries. For example, in a concurrent system of two components, the traditional approach requires hexic time in the worst case for answering one query as well as computing the transitive closure, whereas we show that with one-time preprocessing in almost cubic time, each subsequent query can be answered in at most linear time, and even the transitive closure can be computed in almost quartic time. Furthermore, we establish conditional optimality results showing that the worst-case running time of our algorithms cannot be improved without achieving major breakthroughs in graph algorithms (i.e., improving the worst-case bound for the shortest path problem in general graphs). Preliminary experimental results show that our algorithms perform favorably on several benchmarks.
Classification theorem on irreducible representations of the q-deformed algebra U'_q(so(n))
Creators: name: Iorgov, N. Z.
name: Klimyk, A. U.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: The aim of this paper is to give a complete classification of irreducible finite dimensional representations of the nonstandard q-deformation U'_q(so(n)) (which does not coincide with the Drinfeld-Jimbo quantum algebra U_q(so(n)) of the universal enveloping algebra U(so(n,C)) of the Lie algebra so(n,C) when q is not a root of unity. These representations are exhausted by irreducible representations of the classical type and of the nonclassical type. Theorem on complete reducibility of finite dimensional representations of U'_q(so(n)) is proved.
description: 29 pages
Closer Look at the Uncertainty Estimation in Semantic Segmentation under Distributional Shift
Creators: name: Cygert, Sebastian
name: Wróblewski, Bartłomiej
name: Woźniak, Karol
name: Słowiński, Radosław
name: Czyżewski, Andrzej
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: While recent computer vision algorithms achieve impressive performance on many benchmarks, they lack robustness - presented with an image from a different distribution, (e.g. weather or lighting conditions not considered during training), they may produce an erroneous prediction. Therefore, it is desired that such a model will be able to reliably predict its confidence measure. In this work, uncertainty estimation for the task of semantic segmentation is evaluated under a varying level of domain shift: in a cross-dataset setting and when adapting a model trained on data from the simulation. It was shown that simple color transformations already provide a strong baseline, comparable to using more sophisticated style-transfer data augmentation. Further, by constructing an ensemble consisting of models using different backbones and/or augmentation methods, it was possible to improve significantly model performance in terms of overall accuracy and uncertainty estimation under the domain shift setting. The Expected Calibration Error (ECE) on challenging GTA to Cityscapes adaptation was reduced from 4.05 to the competitive value of 1.1. Further, an ensemble of models was utilized in the self-training setting to improve the pseudo-labels generation, which resulted in a significant gain in the final model accuracy, compared to the standard fine-tuning (without ensemble).
description: International Joint Conference on Neural Networks 2021, https://ieeexplore.ieee.org/document/9533330
First Measurements of the Electron Density Enhancements Expected in C-shocks
Creators: name: Jimenez-Serra, I.
name: Martin-Pintado, J.
name: Viti, S.
name: Martin, S.
name: Rodriguez-Franco, A.
name: Faure, A.
name: Tennyson, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Magnetic precursors of C-shocks accelerate, compress and heat molecular ions, modifying the kinematics and the physical conditions of the ion fluid with respect to the neutral one. Electron densities are also expected to be significantly enhanced in shock precursors. In this Letter, we present observations of strongly polar ion and neutral molecules such as SiO, H13CO+, HN13C and H13CN, which reveal the electron density enhancements associated with the precursor of the young L1448-mm outflow. While in the ambient gas the excitation of the ions and neutrals is explained by collisional excitation by H2 with a single density of 10E5cmE-3, H13CO+ shows an over excitation in the shock precursor component that requires H2 densities of a factor of >10 larger than those derived from the neutral species. This over excitation in H13CO+ can be explained if we consider an additional excitation by collisions with electrons and an electron density enhancement in the precursor stage by a factor of 500, i.e. a fractional ionization of 5x10E-5. These results show that multiline observations can be used to study the evolution of the ion and electron fluids at the first stages of the C-shock interaction.
description: 4 pages, 1 figures, accepted for publication in ApJL
Poacher-population dynamics when legal trade of naturally deceased organisms funds anti-poaching enforcement
Creators: name: Holden, Matthew H.
name: Lockyer, Jakeb
Publisher: name: arXiv
Year: 2021
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences
subject: 37N25, 92D25, 92D40

description: Can a regulated, legal market for wildlife products protect species threatened by poaching? It is one of the most controversial ideas in biodiversity conservation. Perhaps the most convincing reason for legalizing wildlife trade is that trade revenue could fund the protection and conservation of poached species. In this paper, we examine the possible poacher-population dynamic consequences of legal trade funding conservation. The model consists of a manager scavenging carcasses for wildlife products, who then sells the products, and directs a portion of the revenue towards funding anti-poaching law enforcement. Through a global analysis of the model, we derive the critical proportion of product the manager must scavenge, and the critical proportion of trade revenue the manager must allocate towards increased enforcement, in order for legal trade to lead to abundant long-term wildlife populations. We illustrate how the model could inform management with parameter values derived from the African elephant literature, under a hypothetical scenario where a manager scavenges elephant carcasses to sell ivory. We find that there is a large region of parameter space where populations go extinct under legal trade, unless a significant portion of trade revenue is directed towards protecting populations from poaching. The model is general and therefore can be used as a starting point for exploring the consequences of funding many conservation programs using wildlife trade revenue.
description: Added reference to the peer-reviewed, final version of this paper in the Journal of Theoretical Biology
Amplified radio emission from cosmic ray air showers in thunderstorms
Creators: name: Buitink, Stijn
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Cosmic ray air showers produce radio emission, consisting in large part of geosynchrotron emission. Since the radiation mechanism is based on particle acceleration, the atmospheric electric field can play an important role. Especially inside thunderclouds large electric fields can be present. We examine the contribution of an electric field to the emission mechanism theoretically and experimentally. Two mechanisms of amplification of radio emission are considered: the acceleration radiation of the shower particles and the radiation from the current that is produced by ionization electrons moving in the electric field. We selected and evaluated LOPES data recorded during thunderstorms, periods of heavy cloudiness and periods of cloudless weather. We find that during thunderstorms the radio emission can be strongly enhanced. No amplified pulses were found during periods of cloudless sky or heavy cloudiness, suggesting that the electric field effect for radio air shower measurements can be safely ignored during non-thunderstorm conditions.
description: accepted for publication in A&A, 11 pages, 17 figures
Hamiltonian-Driven Shadow Tomography of Quantum States
Creators: name: Hu, Hong-Ye
name: You, Yi-Zhuang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Classical shadow tomography provides an efficient method for predicting functions of an unknown quantum state from a few measurements of the state. It relies on a unitary channel that efficiently scrambles the quantum information of the state to the measurement basis. Facing the challenge of realizing deep unitary circuits on near-term quantum devices, we explore the scenario in which the unitary channel can be shallow and is generated by a quantum chaotic Hamiltonian via time evolution. We provide an unbiased estimator of the density matrix for all ranges of the evolution time. We analyze the sample complexity of the Hamiltonian-driven shadow tomography. For Pauli observables, we find that it can be more efficient than the unitary-2-design-based shadow tomography in a sequence of intermediate time windows that range from an order-1 scrambling time to a time scale of $D^{1/6}$, given the Hilbert space dimension $D$. In particular, the efficiency of predicting diagonal Pauli observables is improved by a factor of $D$ without sacrificing the efficiency of predicting off-diagonal Pauli observables.
description: 4+epsilon pages, 2 figures, with appendix. Add detailed discussion and numerical evidence in the new version. Add and modify some references
Squeezing the Axion
Creators: name: Kuß, Jondalar L. J.
name: Marsh, David J. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We apply the squeezed state formalism to scalar field dark matter (e.g. axion) perturbations generated during inflation. As for the inflationary perturbations, the scalar field state becomes highly squeezed as modes exit the horizon. For as long as $H>m_ϕ$ (with $H$ the Hubble rate and $m_ϕ$ the scalar mass) the scalar field field does not interact during reheating, and we follow its evolution exactly as modes re-enter the horizon. We find that the quantum state remains squeezed after horizon re-entry during the hot big bang. This demonstrates a fact well-known in the theory of inflation: cosmological observables for scalar dark matter are accurately modelled by a classical stochastic field with a fixed phase. Our calculation covers all modes smaller than the present-day cosmic de Broglie wavelength. Larger scale modes mix gravitationally with the environment when $H
description: 8 pages, 4 figures, version accepted for publication in the Open Journal of Astrophysics
Elucidating the effect of intermediate resonances in the quark interaction kernel on the time-like electromagnetic pion form factor
Creators: name: López, Ángel S. Miramontes
name: Sanchis-Alepuz, Hèlios
name: Alkofer, Reinhard
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: An exploratory study of the time-like pion electromagnetic form factor in a Poincaré-covariant bound state formalism in the isospin symmetric limit is presented. Starting from a quark interaction kernel representing gluon-intermediated interactions for valence-type quarks, non-valence effects are included by introducing pions as explicit degrees of freedom. The two most important qualitative aspects are, in view of the presented study, the opening of the dominant $ρ$-meson decay channel and the presence of a multi-particle branch cut setting in when the two-pion threshold is crossed. Based on a recent respective computation of the quark-photon vertex, the pion electromagnetic form factor for space-like and time-like kinematics is calculated. The obtained results for its absolute value and its phase compare favorably to the available experimental data, and they are analyzed in detail by confronting them to the expectations based on an isospin-symmetric version of a vector-meson dominance model.
description: 14 pages, 8 figures. References added
Proton decay via dimension-six operators in intersecting D6-brane models
Creators: name: Cvetic, Mirjam
name: Richter, Robert
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the proton decay via dimension six operators in supersymmetric SU(5)-Grand Unified models based on intersecting D6-brane constructions in Type IIA string theory orientifolds. We include in addition to 10* 10 10* 10 interactions also the operators arising from 5-bar* 5-bar 10* 10 interactions. We provide a detailed construction of vertex operators for any massless string excitation arising for arbitrary intersecting D-brane configurations in Type IIA toroidal orientifolds. In particular, we provide explicit string vertex operators for the 10 and 5-bar chiral superfields and calculate explicitly the string theory correlation functions for above operators. In the analysis we chose the most symmetric configurations in order to maximize proton decay rates for the above dimension six operators and we obtain a small enhancement relative to the field theory result. After relating the string proton decay rate to field theory computations the string contribution to the proton lifetime is tau^{ST}_p =(0.5-2.1) x 10^{36} years, which could be up to a factor of three shorter than that predicted in field theory.
description: 46 pages, 2 figures references added, minor corrections
Dietrich Kahlke, Die Bestattungssitten des Donauländischen Kulturkreises der jüngeren Steinzeit. Teil I: Linienbandkeramik
Creators: name: Uslar, Rafael Von
Publisher: name: Bonner Jahrbücher
Year: 2021

description: Rezension zu: Dietrich Kahlke, Die Bestattungssitten des Donauländischen Kulturkreises der jüngeren Steinzeit. Teil I: Linienbandkeramik. Berlin 1954. 157 Seiten, 38 Abbildungen, 44 Tafeln, 1 Plan.
description: Bonner Jahrbücher, Bd. 155/156, 2.1955/1956: Bonner Jahrbücher
A measurement-based measure of the size of macroscopic quantum superpositions
Creators: name: Korsbakken, Jan Ivar
name: Whaley, K. Birgitta
name: DuBois, Jonathan
name: Cirac, J. Ignacio
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent experiments claiming formation of quantum superposition states in near macroscopic sys- tems raise the question of how the sizes of general quantum superposition states in an interacting system are to be quantified. We propose here a measure of size for such superposition states that is based on what measurements can be performed to probe and distinguish the different branches of the state. The measure allows comparison of the effective size for superposition states in very different physical systems. It can be applied to a very general class of superposition states and reproduces known results for near-ideal cases. Comparison with a prior measure based on analy- sis of coherence between branches indicates that significantly smaller effective superposition sizes result from our measurement-based measure. Application to a system of interacting bosons in a double-well trapping potential shows that the effective superposition size is strongly dependent on the relative magnitude of the barrier height and interparticle interaction.
description: 21 pages, 20 figures. Accepted by Phys. Rev. A. Replaced old version with accepted version. Significant changes and improvements, particularly to section on 1-particle measurements