cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Galaxy shape statistics in the effective field theory
Creators: name: Vlah, Zvonimir
name: Chisari, Nora Elisa
name: Schmidt, Fabian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Intrinsic galaxy alignments yield an important contribution to the observed statistics of galaxy shapes. The general bias expansion for galaxy sizes and shapes in three dimensions has been recently described by Vlah, Chisari \& Schmidt using the general perturbative effective field theory (EFT) framework, in analogy to the clustering of galaxies. In this work, we present a formalism that uses the properties of spherical tensors to project galaxy shapes onto the observed sky in the flat-sky approximation and compute the two-point functions at next-to-leading order as well as the leading-order three-point functions of galaxy shapes and number counts. The resulting expressions are given in forms that are convenient for efficient numerical implementation. For a source redshift distribution typical of Stage IV surveys, we find that that nonlinear intrinsic alignment contributions to galaxy shape correlations become relevant at angular wavenumbers $l \gtrsim 100$.
description: 32 pages, 5 figures
Criminalising Coercive Control: An Australian Survey - Data Snapshot
Creators: name: Reeves, Ellen
name: Fitz-Gibbon, Kate
name: Walklate, Sandra
name: Meyer, Silke
Publisher: name: Monash University
Year: 2021
Subjects: subject: 160299 Criminology not elsewhere classified
subject: FOS: Law

description: This snapshot presents data gathered over a six-week period in early 2021 from an online survey aimed at adult Australians who have experienced coercive control in a domestic and family violence context. The survey garnered 1261 responses and this snapshot presents the key demographical characteristics of the respondents and their experiences of coercive control.
Omnia iura communis Vercellarum. Note sulla compilazione del liber iurium dei Biscioni
Creators: name: Negro, Flavia
Publisher: name: Scrineum
Year: 2023

description: The essay deals with the Biscioni, the liber iurium promoted by the Visconti in Vercelli in the mid-fourteenth century, shortly after they became the lords of the city. The making of the liber, produced in two copies, and with each specimen composed of two codices, took a total of eight years, from 1337 to 1345, and during this period the original project underwent many changes. The codes originally should not have been four but two, whit the second specimen conceived as a duplicate of the other; yet they ended up being – as the notary responsible for their productions defined them – only similar ('similes' in the latin formulation).


The analysis of these changes in progress reveals the close relationship between the liber iurium and the city statutes, the other great publishing enterprise launched, again on the impulse of the Visconti regime, a few years after the Biscioni, and above all with the municipal policy of those years. In short, the variations in the structure of the Biscioni are not just a documentary issue, but reveal something of the first Visconti domination in Vercelli. The new regime inaugurated, from its inception, a phase of heated conflict, aimed at strengthening the jurisdictional rights of the municipality over the districtus: many initiatives were taken against the lords of the countryside as well as against neighboring cities and powers. The Visconti mayors and their vicars made the liber iurium an active tool and a faithful mirror of the renewed city power.
description: Scrineum, V. 19 N. 1 (2022): Scrineum
New Formulation of Causal Dissipative Hydrodynamics: Shock wave propagation
Creators: name: Mota, Ph.
name: Denicol, G. S.
name: Koide, T.
name: Kodama, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The first 3D calculation of shock wave propagation in a homogeneous QGP has been performed within the new formulation of relativistic dissipative hydrodynamics which preserves the causality. We found that the relaxation time plays an important role and also affects the angle of Mach cone.
description: 4 pages, 1 figure, Proceedings of Quark Matter 2006
Performance Optimization on Practical Quantum Random Number Generators: Modification on Min-entropy Evaluation and Acceleration on Post Processing
Creators: name: Zhao, Zehao
name: Ma, Xiongfeng
name: Zhou, Hongyi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Quantum random number generation is a technique to generate random numbers by extracting randomness from specific quantum processes. As for practical random number generators, they are required not only to have no information leakage but also have a high speed at generating random sequences. In this paper, we consider the generators based on laser phase noise and propose a method to modify the estimation of min-entropy, which can guarantee no information leakage to the eavesdropper. We also accelerate post processing based on Toeplitz matrix with Fast Fourier Transformation, reducing its time complexity to O(nlogn). Furthermore, we discuss the influence on post processing speed by block length and find a proper block length to process a fixed-length raw sequence.
Coupling Hybrid Inflation to Moduli
Creators: name: Brax, Ph.
name: van de Bruck, C.
name: Davis, A. C.
name: Davis, Stephen C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Hybrid inflation can be realised in low-energy effective string theory, as described using supergravity. We find that the coupling of moduli to F-term hybrid inflation in supergravity leads to a slope and a curvature for the inflaton potential. The epsilon and eta parameters receive contributions at tree and one loop level which are not compatible with slow roll inflation. Furthermore the coupling to the moduli sector can even prevent inflation from ending at all. We show that introducing shift symmetries in the inflationary sector and taking the moduli sector to be no-scale removes most of these problems. If the moduli fields are fixed during inflation, as is usually assumed, it appears that viable slow-roll inflation can then be obtained with just one fine-tuning of the moduli sector parameters. However, we show this is not a reasonable assumption, and that the small variation of the moduli fields during inflation gives a significant contribution to the effective inflaton potential. This typically implies that eta is approximately -6, although it may be possible to obtain smaller values with heavy fine-tuning.
description: 24 pages; references and comments added, section 6 modified
Women’s experience of power in therapy with a women therapist
Creators: name: Ledgard, Delyse
Publisher: name: University of British Columbia
Year: 2009

description: This study addressed women's experiences of power in the therapeutic relationship. A grounded theory method of investigation was used. Eight women were interviewed who had been, or were, in therapy with a woman therapist. The interviews progressed from a generalized discussion of the therapeutic relationship and concept of power to a more detailed examination of the women's experiences of power within therapy. The results highlight the individualistic nature of the experience of power in therapy and that empowerment is achieved through a woman's self-knowledge. Disempowerment occurred when a woman's self- expression was restricted or when she felt judged and rejected by the therapist. The implications for therapists are summarized by the need for therapist's to respond to the individual needs of the women in the therapeutic process.
Η εμπειρία των ανδρών και των γυναικών που μεγάλωσαν σε ιδρύματα παιδικής προστασίας:
Creators: name: Χριστοφορίδου, Φωτεινή Αχιλλέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Ιδρυμα
Οικογένεια
Ρόλος
Institution
Family
Role

description: Σκοπός της συγκεκριμένης έρευνας ήταν η διερεύνηση της εμπειρίας των ανθρώπων που μεγάλωσαν ή έζησαν για ένα χρονικό διάστημα των παιδικών τους χρόνων σε ορφανοτροφεία της χώρας μας και πως αυτή η εμπειρία διαμόρφωσε τις σχέσεις τους με τους άλλους ανθρώπους, το γονεϊκό και συζυγικό τους ρόλο, καθώς και το ρόλο της οικογένειας που δημιούργησαν ή σκέφτονται να δημιουργήσουν. Τις τελευταίες δεκαετίες, έχει διεξαχθεί ένας σημαντικός αριθμός ερευνών σχετικά με τις επιπτώσεις της ιδρυματικής ανατροφής, τόσο στη παιδική ηλικία όσο και στην ενήλικη ζωή. Παρ’ όλα αυτά, ελάχιστες είναι οι μελέτες που αναφέρονται στον τρόπο που νοηματοδοτούν οι ίδιοι οι «απόφοιτοι» των ιδρυμάτων τη αυτή τους την εμπειρία. Στην έρευνα συμμετείχαν απόφοιτοι ιδρυμάτων από διάφορες περιοχές της Ελλάδας. Για τη συλλογή των δεδομένων χρησιμοποιήθηκε η ημι-δομημένη συνέντευξη. Τα απομαγνητοφωνημένα κείμενα αναλύθηκαν με βάση την ερμηνευτική φαινομενολογική μέθοδο. Τα αποτελέσματα της έρευνας έδειξαν ότι οι συμμετέχοντες συνέδεσαν την εμπειρία του ιδρύματος με τον τρόπο που περιγράφουν τον εαυτό τους σήμερα καθώς και με το συζυγικό και γονεϊκό τους ρόλο. Επιπλέον, τα αποτελέσματα ανέδειξαν σημαντικές διαφορές ως προς το φύλο των συμμετεχόντων, γεγονός που αντανακλά τις στερεότυπες πολιτισμικές απόψεις για τη γυναικεία και ανδρική ταυτότητα.
description: The aim of this study was the investigation of exploring the experiences of people who grew up in orphanages and in that this is the experience their relations with others, the role parents, husband and their role in the family who created or are considering to create. Graduates participated in the study institutions in different regions of Greece. For the collection of data were semi-structured interview. The transcripts were analyzed based on interpretative phenomenological analysis. the results showed that participants linked the experience of the institution with the manner described theirs elf today as well as their with her partner and parent roles.Moreover, results showed significant differences in the gender of participants, reflecting the stereotyped cultural views of female and male identity.
Improving Helium Abundance Determinations with Leo P as a Case Study
Creators: name: Aver, Erik
name: Berg, Danielle A.
name: Olive, Keith A.
name: Pogge, Richard W.
name: Salzer, John J.
name: Skillman, Evan D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Currently, the primordial helium abundance is best estimated through spectroscopic observations of H II regions in metal-poor galaxies. However these determinations are limited by several systematic uncertainties which ultimately limit our ability to accurately ascertain the primordial abundance. In this study, we improve the methodologies for solving for the reddening, the emission contributions from collisional excitation of the H I atoms, the effects underlying absorption in the H I and He I emission lines, and the treatment of the blended H I and He I emission at $λ$3889 with the aim of lowering the systematic uncertainties in helium abundance determinations. To apply these methods, we have obtained observations of the He I $λ$10830 emission line in the brightest H II region in the extremely metal-poor (3$\%$ Z$_{\odot}$) galaxy Leo P with the LUCI1 instrument on the LBT. We combine this measurement with previous MODS/LBT observations to derive an improved helium abundance. In doing so, our present analysis results in a decrease in the uncertainty in the helium abundance of Leo P by approximately 70%. This result is combined with data from other observations to estimate the primordial helium mass fraction, Y$_{p}$ $=$ 0.2453 $\pm$ 0.0034.
description: 30 pages, 3 figures
Κατάλογος περιεχομένων Χειρογράφων της Ιεράς Μονής Ιβήρων του Αγίου Όρους (αριθ. 400-450)
Creators: name: Μανάφης, Παναγιώτης Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Κατάλογος
Χειρόγραφα
Μονή Ιβήρων
Catalogue
Manuscripts
Holy Monastery of Iviron

description: Σκοπός της παρούσης εργασίας ήταν η σύνταξη καταλόγου μέρους της συλλογής ελληνικών χειρογράφων της Ιεράς Μονής Ιβήρων του Αγίου Όρους. Η σύνταξη του καταλόγου βασίστηκε σε μέρος της συλλογής μικροταινιών της Ιεράς Μονής Ιβήρων του Αγίου Όρους. Στην παρούσα εργασία εξετάζονται οι μικροταινίες με αύξοντα αριθμό 400-409, 411-428, 435-450. Η περιγραφή ακολουθεί την εξής σειρά: Στην πρώτη γραμμή δίνεται ο αύξων αριθμός της μικροταινίας και σε παρένθεση ο ταξινομικός αριθμός του χειρογράφου. Στην τρίτη γραμμή αναγράφονται συγκεκομμένα η χρονολόγηση του χειρογράφου, το υλικό του, οι διαστάσεις του σε χιλιοστά, ο αριθμός των φύλλων και των παραφύλλων, ο αριθμός των στηλών (εάν είναι μεγαλύτερος του ενός) και τέλος ο αριθμός των στίχων. Ακολουθεί η λεπτομερής αναγραφή του περιεχομένου (Α) του χειρογράφου. Αυτή άλλωστε αποτέλεσε και τον κύριο στόχο του παρόντος καταλόγου. Για τα αποσπάσματα, η ταύτιση των οποίων στάθηκε αδύνατη, δηλώνεται η αρχή και το τέλος τους. Στο τέλος της ενότητας αυτής σημειώνονται τα άγραφα φύλλα. Μετά τη δήλωση του περιεχομένου παρατίθενται τα βιβλιογραφικά σημειώματα (Β). Η εργασία τελειώνει με δύο αλφαβητικούς πίνακες: α) των συγγραφέων και β) των αντιγραφέων των χειρογράφων.
description: The purpose of this research paper was the creation of a catalogue that portrayed a part of the greek manuscripts that the Holy Monastery of Iviron in Mount Athos, Greece, has in its possession. The catalogue was based on a part of the microfilm collection that the Monastery owns. In this paper are analyzed the following microfilms in serial number from 400-409, 411-428, 435-450. The description consists of the following order: In the first line the serial number of the microfilm is presented and the taxonomic number in a parenthesis. The third line presents the dating of the manuscript, the material of the manuscript, its dimensions, the number of pages, the number of the column and the line number. A detailed description of the manuscript content (A) follows. That was after all the aim of this catalogue. For the fragments that were unable to be identified there is an indication of their beginning and end. In the end of this section blank pages are marked. The paper finishes with two lists in alphabetic order: a) the list of the writers and b) the list of the scriveners.
description: Η πρόσβαση στην ηλεκτρονική μορφή της εργασίας δεν είναι εφικτή
The hadronic contribution to (g-2) of the muon
Creators: name: Davier, Michel
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The evaluation of the hadronic contribution to the muon magnetic anomaly $a_μ$ is revisited, taking advantage of new experimental data on $e^+e^-$ annihilation into hadrons: SND and CMD-2 for the $π^+π^-$ channel, and \babar for multihadron final states. Discrepancies are observed between KLOE and CMD-2/SND data, preventing one from averaging all the $e^+e^-$ results. The long-standing disagreement between spectral functions obtained from $τ$ decays and $e^+e^-$ annihilation is still present, and not accounted by isospin-breaking corrections, for which new estimates have been presented. The updated Standard Model value for $a_μ$ based on $e^+e^-$ annihilation data is now reaching a precision better than experiment, and it disagrees with the direct measurement from BNL at the 3.3$σ$ level, while the $τ$-based estimate is in much better agreement. The $τ$/$e^+e^-$ discrepancy, best revealed when comparing the measured branching fraction for $τ^- \to π^- π^0 ν_τ$ to its prediction from the isospin-breaking-corrected $e^+e^-$ spectral function, remains a serious problem to be understood.
description: 9 pages, 7 figures, invited talk at the Tau06 International Workshop, Pisa, September 19-22 2006
Demetrio Zeno, Bernardino Donato e il Vat. Pal. gr. 334, manoscritto di tipografia per l’edizione dell’Orthodoxae Fidei Expositio di Giovanni Damasceno (Verona, 1531)
Creators: name: Bianchi, Elisa
Publisher: name: Scrineum
Year: 2023

description: The subject of this contribution is the manuscript Città del Vaticano, Biblioteca Apostolica Vaticana, Pal. gr. 334, witness of the Orthodoxae Fidei Expositio by John Damascenus, fully written by Demetrius Zenus (Zakynthos, ca. 1503/1504 - Venezia, 1540?), and used as Druckvorlage for the corresponding printed edition of 1531, published by the Nicolini da Sabbio in Verona. The goal is twofold: 1) contextualising the edition published by Bernardinus Donatus and Demetrius Zenus in the context of the cultural project promoted in Verona by bishop Matteo Giberti; 2) carrying out a palaeographic analysis on Pal. gr. 334, with particular attention to its marginalia and to the typographical indications used to prepare the printed edition.


 
description: Scrineum, V. 19 N. 1 (2022): Scrineum
Plane Wave Elastography: A Frequency-Domain Ultrasound Shear Wave Elastography Approach
Creators: name: Khodayi-mehr, Reza
name: Urban, Matthew W.
name: Zavlanos, Michael M.
name: Aquino, Wilkins
Publisher: name: arXiv
Year: 2020
Subjects: subject: Medical Physics (physics.med-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In this paper, we propose Plane Wave Elastography (PWE), a novel ultrasound shear wave elastography (SWE) approach. Currently, commercial methods for SWE rely on directional filtering based on the prior knowledge of the wave propagation direction, to remove complicated wave patterns formed due to reflection and refraction. The result is a set of decomposed directional waves that are separately analyzed to construct shear modulus fields that are then combined through compounding. Instead, PWE relies on a rigorous representation of the wave propagation using the frequency-domain scalar wave equation to automatically select appropriate propagation directions and simultaneously reconstruct shear modulus fields. Specifically, assuming a homogeneous, isotropic, incompressible, linear-elastic medium, we represent the solution of the wave equation using a linear combination of plane waves propagating in arbitrary directions. Given this closed-form solution, we formulate the SWE problem as a nonlinear least-squares optimization problem which can be solved very efficiently. Through numerous phantom studies, we show that PWE can handle complicated waveforms without prior filtering and is competitive with state-of-the-art that requires prior filtering based on the knowledge of propagation directions.
description: 26 pages, 14 figures
A Compact Approximate Solution to the Friedel-Anderson Impuriy Problem
Creators: name: Bergmann, Gerd
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: An approximate groundstate of the Anderson-Friedel impurity problem is presented in a very compact form. It requires solely the optimization of two localized electron states and consists of four Slater states (Slater determinants). The resulting singlet ground state energy lies far below the Anderson mean field solution and agrees well with the numerical results by Gunnarsson and Schoenhammer, who used an extensive 1/N_{f}-expansion for a spin 1/2 impurity with double occupancy of the impurity level. PACS: 85.20.Hr, 72.15.Rn
Caracterização do microbioma da peeira através da utilização de novas tecnologias de sequenciação
Creators: name: Usié, Ana
Publisher: name: Zenodo
Year: 2022

description: Event: Seminário "Do diagnóstico clínico da peeira à bioinformática: desafios e oportunidades"; Local: Feira "Patrimónios do Sul", Beja (Portugal); Date: 30 Set. 2022
Σύγκριση μεθόδων ταξινόμησης αστικού πρασίνου με τη χρήση πολυφασματικών εικόνων Quickbird, Ikonos και Worldview-2:
Creators: name: Αντωνιάδου, Σόνια Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Αστικό πράσινο
Classification
Worldview-2
Urban green

description: Η παρούσα μεταπτυχιακή διατριβή πραγματοποιήθηκε στα πλαίσια του Μεταπτυχιακού Προγράμματος Σπουδών του Τμήματος Αγρονόμων και Τοπογράφων Μηχανικών του Αριστοτελείου Πανεπιστημίου Θεσσαλονίκης, στην Ειδίκευση της Γεωπληροφορικής, στην Κατεύθυνση της Διαχείρισης Φωτογραμμετρικής Παραγωγής & Τηλεπισκόπισης σε περιβάλλον Γ.Σ.Π. Ο σκοπός της παρούσας εργασίας είναι κατά κύριο λόγο ο υπολογισμός του αστικού πρασίνου του Δήμου Θεσσαλονίκης μέσα από τη χρήση τριών τηλεσκοπικών απεικονίσεων Worldview-2, Ikonos και Quickbird και ειδικότερα η μελέτη δυο πάρκων (το πάρκο της Χ.Α.Ν.Θ. και το πάρκο του Πεδίου του Άρεως). Δοκιμάστηκαν τρεις τρόποι ταξινόμησης (ISODATA analysis, Μέγιστης Πιθανοφάνειας και Δέντρου αποφάσεων) σε επίπεδο pixel, καθώς και η αντικειμενοστραφής ταξινόμηση. Για τη βελτίωση της ακρίβειας ταξινόμησης των περιοχών μελέτης χρησιμοποιήθηκαν ο Κανονικοποιημένος Δείκτης Βλάστησης NDVI (Normalized Difference Vegetation Index), ο MSAVI (Modified Soil-Adjusted Vegetation Index), ο Κανονικοποιημένος Δείκτης Νερού (Normalized Difference Water Index) και το Κανονικοποιημένο Ψηφιακό Μοντέλο Επιφανείας nDSM (normalized Digital Surface Model). Τέλος έγινε η εκτίμηση της ακρίβειας των μεθόδων ταξινόμησης, σύγκριση των αποτελεσμάτων αυτών και αξιολόγηση τους
description: The diploma thesis was carried out during the Post Graduate Program “Geoinformatics: Photogrammetric Production and Remote Sensing Management in the environment of Geographic Information Systems” at the School of Rural and Surveying Engineering, Faculty of Engineering, Aristotle University of Thessaloniki. The objective of this study is to compare three high resolution satellite images fromWorldview-2, IKONOS and Quickbird by identifying urban green in Thessaloniki and especially in two central parks of Thessaloniki (Y.M.CA. park and Pedion tou Areos park). Three types of representative classification algorithms (ISODATA analysis, Maximum Likelihood, Decision Tree) were tested at the pixel level and object-oriented classification. In order to improve the classification process, various indices were applied on the images like the NDVI (Normalized Difference Vegetation Index), MSAVI (Modified Soil-Adjusted Vegetation Index), NDWI (Normalized Difference Water Index) and the available nDSM (normalized Digital Surface Model) of the study areas. Finally the evaluation of precision of methods of classification was realized and important conclusions are derived from the classified images.
Making an (im)PACT on Scholarly Publication at UMD
Creators: name: Mack, Daniel C.
name: DePope, LeighAnn
name: Saponaro, Maggie Z.
Publisher: name: Charleston Information Group, LLC
Year: 2022
Subjects: scholarly publishing, open access, electronic resource licensing, Publishing Access and Contract Terms (PACT)

description: Conference proceedings.
description: Researchers at the University of Maryland (UMD) provide cutting edge solutions to problems on a variety of topics. However, the current state of scholarly publishing has made it challenging to make that research accessible, and licensing resources where research is published has become increasingly complex. To address these issues, in spring 2020, the Publishing, Access, and Contract Terms (UMD PACT) working group was formed. A subgroup of the University Library Council (ULC) and sponsored jointly by the ULC, the Office of the Provost, Faculty Affairs, and the Division of Research, UMD PACT is a cross-divisional group charged with developing and enacting a new rights-retention, open access licensing policy based on the Harvard University model to support and encourage sustainable open access of faculty research. This paper provides background on how and why PACT was formed, its membership and timeline, its work to craft and adopt licensing principles and a new framework for licensing of scholarly content for UMD researchers and communicate these changes with campus researchers.
Wind- and Gravity-Forced Drop Depinning
Creators: name: White, Edward B.
name: Schmucker, Jason A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Liquid drops adhere to solid surfaces due to surface tension but can depin and run back along the surface due to wind or gravity forcing. This work develops a simple mechanistic model for depinning by combined gravity and high-Reynolds-number wind forcing and tests that model using water drops on a roughened aluminum surface. On non-inclined surfaces, drops depin at a constant critical Weber number, $W\!e_{\mathrm{crit}}=7.9$, for the present wettability conditions. On inclined surfaces, $W\!e_{\mathrm{crit}}$ decreases linearly with the product of the Bond number and the width-to-height aspect ratio of the unforced drop. The linear slope is different in distinct wind- and gravity-dominated forcing regimes above and below $W\!e_{\mathrm{crit}}=4$. Contact line shapes and drop profile shapes are measured at depinning conditions but do not adequately explain the differences between the two forcing regimes.
description: Submitted to Physical Review Fluids. 12 pages, 8 figures
Therapeutic alliance and attachment in play therapy
Creators: name: Heller, Deborah C.
Publisher: name: University of British Columbia
Year: 2009

description: This study examined how the evolution of therapeutic alliance during child-centered play therapy varied between two children with differing patterns of attachment. The two children recruited, both 5 years-old, were a female, classified as insecure-defended (subclassification A3 - caretaking) and a male, classified as insecure-coercive (subclassification C2 - disarming). The children's attachment patterns were determined by two independent raters, using Crittenden's (1992a) classification of quality of attachment of preschool-aged children. Each child received 10 weekly non-directive play therapy sessions, which were videotaped, with the investigator as therapist. Participant-observation was used for data collection, and open coding and pattern-matching was used for data analysis. Pattern differences that emerged in the children's categories of play and categories of the therapeutic relationship were related to changes in therapeutic alliance and in attachment strategies for managing distress. Over time, the A3 child responded more to the therapist's responsive behaviours to her expressed needs and feelings; and engaged in relatively more self expression in her play. Over time, the C2 child responded more to the therapist's mere availability to the child; and tended to engage in relatively more self agency (self direction) in his play. Further play therapy research is needed to confirm the relationship between attachment and therapeutic alliance with children.
FastVC: Fast Voice Conversion with non-parallel data
Creators: name: Mayor, Oriol Barbany
name: Cernak, Milos
Publisher: name: arXiv
Year: 2020
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Machine Learning (cs.LG)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper introduces FastVC, an end-to-end model for fast Voice Conversion (VC). The proposed model can convert speech of arbitrary length from multiple source speakers to multiple target speakers. FastVC is based on a conditional AutoEncoder (AE) trained on non-parallel data and requires no annotations at all. This model's latent representation is shown to be speaker-independent and similar to phonemes, which is a desirable feature for VC systems. While the current VC systems primarily focus on achieving the highest overall speech quality, this paper tries to balance the development concerning resources needed to run the systems. Despite the simple structure of the proposed model, it outperforms the VC Challenge 2020 baselines on the cross-lingual task in terms of naturalness.
Classifying High-cadence Microlensing Light Curves I; Defining Features
Creators: name: Khakpash, Somayeh
name: Pepper, Joshua
name: Penny, Matthew
name: Gaudi, B. Scott
name: Street, R. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Microlensing is a powerful tool for discovering cold exoplanets, and the The Roman Space Telescope microlensing survey will discover over 1000 such planets. Rapid, automated classification of Roman's microlensing events can be used to prioritize follow-up observations of the most interesting events. Machine learning is now often used for classification problems in astronomy, but the success of such algorithms can rely on the definition of appropriate features that capture essential elements of the observations that can map to parameters of interest. In this paper, we introduce tools that we have developed to capture features in simulated Roman light curves of different types of microlensing events, and evaluate their effectiveness in classifying microlensing light curves. These features are quantified as parameters that can be used to decide the likelihood that a given light curve is due to a specific type of microlensing event. This method leaves us with a list of parameters that describe features like the smoothness of the peak, symmetry, the number of peaks, and width and height of small deviations from the main peak. This will allow us to quickly analyze a set of microlensing light curves and later use the resulting parameters as input to machine learning algorithms to classify the events.
description: 29 Pages, 30 Figures, 3 Tables, Accepted to the Astronomical Journal
WhiskyMHD: a new numerical code for general relativistic magnetohydrodynamics
Creators: name: Giacomazzo, B.
name: Rezzolla, L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The accurate modelling of astrophysical scenarios involving compact objects and magnetic fields, such as the collapse of rotating magnetized stars to black holes or the phenomenology of gamma-ray bursts, requires the solution of the Einstein equations together with those of general-relativistic magnetohydrodynamics. We present a new numerical code developed to solve the full set of general-relativistic magnetohydrodynamics equations in a dynamical and arbitrary spacetime with high-resolution shock-capturing techniques on domains with adaptive mesh refinements. After a discussion of the equations solved and of the techniques employed, we present a series of testbeds carried out to validate the code and assess its accuracy. Such tests range from the solution of relativistic Riemann problems in flat spacetime, over to the stationary accretion onto a Schwarzschild black hole and up to the evolution of oscillating magnetized stars in equilibrium and constructed as consistent solutions of the coupled Einstein-Maxwell equations.
description: minor changes to match the published version
A source of gamma rays coincident with the shell of the supernova remnant CTB 80
Creators: name: Araya, M.
name: Herrera, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: CTB 80 (G69.0+2.7) is a relatively old (50--80 kyr) supernova remnant (SNR) with a complex radio morphology showing three extended radio arms and a radio and X-ray nebula near the location of the pulsar PSR B1951+32. We report on a study of the GeV emission in the region of CTB 80 with \emph{Fermi}-LAT data. An extended source with a size of 1.3$^\circ$, matching the size of the infrared shell associated to the SNR, was discovered. The GeV emission, detected up to an energy of $\sim 20$ GeV, is more significant at the location of the northern radio arm where previous observations imply that the SNR shock is interacting with ambient material. Both hadronic and leptonic scenarios can reproduce the multiwavelength data reasonably well. The hadronic cosmic ray energy density required is considerably larger than the local Galactic value and the gamma-ray leptonic emission is mainly due to bremsstrahlung interactions. We conclude that GeV particles are still trapped or accelerated by the SNR producing the observed high-energy emission when interacting with ambient material.
description: 7 pages, 5 figures. To appear in MNRAS
Scaling Behavior of a Turbulent Kinetic Energy Closure Scheme for the Stably Stratified Atmosphere: A Steady-State Analysis
Creators: name: MacDonald, Michael
name: Teixeira, João
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present a turbulent kinetic energy (TKE) closure scheme for the stably stratified atmosphere in which the mixing lengths for momentum and heat are not parameterized in the same manner. The key difference is that, while the mixing length for heat tends towards the stability independent mixing length for momentum in neutrally stratified conditions, it tends towards one based on the Brunt-Väisälä time scale and square root of the TKE in the limit of large stability. This enables a unique steady-state solution for TKE to be obtained, which we demonstrate would otherwise be impossible if the mixing lengths were the same. Despite the model's relative simplicity, it is shown to perform reasonably well with observational data from the 1999 Cooperative Atmosphere-Surface Exchange Study (CASES-99) using commonly employed model constants. Analyzing the scaling behavior of the non-dimensional velocity and potential temperature gradients, or of the stability (correction) functions, reveals that for large stability the present model scales in the same manner as the first-order operational scheme of Viterbo et al. (Quart. J. Roy. Meteor. Soc. 125, 2401-2426, 1999). Alternatively, it appears as a blend of two cases of the TKE closure scheme of Baas et al. (Bound.-Layer Meteor. 127, 17-36, 2008). Critically, because a unique steady-state TKE can be obtained, the present model avoids the non-physical behavior identified in one of the cases of Baas et al. (2008).
description: Accepted in the Journal of the Atmospheric Sciences
Quantizing Derived Mapping Stacks
Creators: name: Grady, Ryan E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this review we discuss several topological and geometric invariants obtained by quantizing $σ$-models. More precisely, we don't quantize the entire mapping stack of fields, but rather only the substack of low energy fields. The theory restricted to this substack can be presented Lie theoretically and the problem is reduced to perturbative gauge theory. Throughout, we make extensive use of derived symplectic geometry and the BV formalism of Costello and Gwilliam. Finally, we frame the AJ Conjecture in knot theory as a question of quantizing character stacks.
description: 22p. Feedback welcome
Injective convolution operators on ${\ell}^{\infty}(Γ)$ are surjective
Creators: name: Choi, Yemon
Publisher: name: arXiv
Year: 2006
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 43A20, 46L05

description: Let $Γ$ be a discrete group and let $f \in \ell^1(Γ)$. We observe that if the natural convolution operator $ρ_f:\ell^{\infty}(Γ)\to \ell^{\inf ty}(Γ)$ is injective, then f is invertible in $\ell^1(Γ)$. Our proof simplifies and generalizes calculations in a preprint of Deninger and Schmidt, by appealing to the direct finiteness of the algebra $\ell^1(Γ)$. We give simple examples to show that in general one cannot replace $\ell^{\infty}$ with $\ell^p$, $1\leq p< \infty$, nor with $L^{\infty}(G)$ for nondiscrete G. Finally, we consider the problem of extending the main result to the case of weighted convolution operators on $Γ$, and give some partial results.
description: (v1) 3 pp. note, to be submitted (v2) Expanded version, now 7 pp. Extra material includes: more context/motivation: extra example for non-discrete case; new section on the weighted case. Some definitions also clarified
Understanding AGN-Host Connection in Partially Obscured Active Galactic Nuclei. Part I: The Nature of AGN+HII Composites
Creators: name: Wang, J.
name: Wei, J. Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The goal of our serial papers is to examine the evolutionary connection between AGN and star formation in its host galaxy in the partially obscured AGNs (i.e., Seyfert 1.8 and 1.9 galaxies). Taking advantage of these galaxies, the properties of both components can be studied together by direct measurements. In this paper, we focus on the broad-line composite galaxies (composite AGNs) which are located between the theoretical and empirical separation lines in the [NII]/Ha vs. [OIII]/Hb diagram. These galaxies are searched for from the composite galaxies provided by the SDSS DR4 MPA/JHU catalogs. After re-analyze the spectra, we perform a fine classification for the 85 composite AGNs in terms of the BPT diagrams. All the objects located below the three theoretical separation lines are associated with a young stellar population (<1Gyrs), while either a young or old stellar population is identified in the individual multiply-classified object. The multiply-classified objects with a very old stellar population are located in the LINER region in the [OI]/Ha vs. [OIII]/Hb diagram. We then consider the connection between AGN and star formation to derive the key results. The Eddington ratio inferred from the broad Ha emission, the age of the stellar population of AGN's host as assessed by D_n(4000), and the line ratio [OI]/Ha are found to be related with each other. These relations strongly support the evolutionary scenario in which AGNs evolve from high L/L_Edd state with soft spectrum to low L/L_Edd state with hard spectrum as young stellar population ages and fades. The significant correlation between the line ratio [OI]/Ha and D_n(4000) leads us to suggest that the line ratio could be used to trace the age of stellar population in type I AGNs.
description: 39 pages, 11 figures, 1 table, accepted by ApJ
Subdegree growth rates of infinite primitive permutation groups
Creators: name: Smith, Simon M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Group Theory (math.GR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 20B15, 05C25

description: A transitive group $G$ of permutations of a set $Ω$ is primitive if the only $G$-invariant equivalence relations on $Ω$ are the trivial and universal relations. If $α\in Ω$, then the orbits of the stabiliser $G_α$ on $Ω$ are called the $α$-suborbits of $G$; when $G$ acts transitively the cardinalities of these $α$-suborbits are the subdegrees of $G$. If $G$ acts primitively on an infinite set $Ω$, and all the suborbits of $G$ are finite, Adeleke and Neumann asked if, after enumerating the subdegrees of $G$ as a non-decreasing sequence $1 = m_0 \leq m_1 \leq ...$, the subdegree growth rates of infinite primitive groups that act distance-transitively on locally finite distance-transitive graphs are extremal, and conjecture there might exist a number $c$ which perhaps depends upon $G$, perhaps only on $m$, such that $m_r \leq c(m-2)^{r-1}$. In this paper it is shown that such an enumeration is not desirable, as there exist infinite primitive permutation groups possessing no infinite subdegree, in which two distinct subdegrees are each equal to the cardinality of infinitely many suborbits. The examples used to show this provide several novel methods for constructing infinite primitive graphs. A revised enumeration method is then proposed, and it is shown that, under this, Adeleke and Neumann's question may be answered, at least for groups exhibiting suitable rates of growth.
description: 41 pages
Direct Imaging of Electrical Switching of Antiferromagnetic Néel Order in $α$-Fe$_2$O$_3$ Epitaxial Films
Creators: name: Cogulu, Egecan
name: Statuto, Nahuel N.
name: Cheng, Yang
name: Yang, Fengyuan
name: Chopdekar, Rajesh V.
name: Ohldag, Hendrik
name: Kent, Andrew D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the direct observation of switching of the Néel vector of antiferromagnetic (AFM) domains in response to electrical pulses in micron-scale Pt/$α$-Fe$_2$O$_3$ Hall bars using photoemission electron microscopy. Current pulses lead to reversible and repeatable switching, with the current direction determining the final state, consistent with Hall effect experiments that probe only the spatially averaged response. Current pulses also produce irreversible changes in domain structure, in and even outside the current path. In both cases only a fraction of the domains switch in response to pulses. Further, analysis of images taken with different x-ray polarizations shows that the AFM Néel order has an out-of-plane component in equilibrium that is important to consider in analyzing the switching data. These results show that -in addition to effects associated with spin-orbit torques from the Pt layer, which can produce reversible switching-changes in AFM order can be induced by purely thermal effects.
description: 5 pages, 5 figures
A titanic interstellar medium ejection from a massive starburst galaxy at redshift 1.4
Creators: name: Puglisi, Annagrazia
name: Daddi, Emanuele
name: Brusa, Marcella
name: Bournaud, Frederic
name: Fensch, Jeremy
name: Liu, Daizhong
name: Delvecchio, Ivan
name: Calabrò, Antonello
name: Circosta, Chiara
name: Valentino, Francesco
name: Perna, Michele
name: Jin, Shuowen
name: Enia, Andrea
name: Mancini, Chiara
name: Rodighiero, Giulia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Feedback-driven winds from star formation or active galactic nuclei might be a relevant channel for the abrupt quenching star formation in massive galaxies. However, both observations and simulations support the idea that these processes are non-conflictingly co-evolving and self-regulating. Furthermore, evidence of disruptive events that are capable of fast quenching is rare, and constraints on their statistical prevalence are lacking. Here we present a massive starburst galaxy at z=1.4 which is ejecting $46 \pm 13$\% of its molecular gas mass at a startling rate of $\gtrsim 10,000$ M$_{\odot}{\rm yr}^{-1}$. A broad component that is red-shifted from the galaxy emission is detected in four (low- and high-J) CO and [CI] transitions and in the ionized phase, which ensures a robust estimate of the expelled gas mass. The implied statistics suggest that similar events are potentially a major star-formation quenching channel. However, our observations provide compelling evidence that this is not a feedback-driven wind, but rather material from a merger that has been probably tidally ejected. This finding challenges some literature studies in which the role of feedback-driven winds might be overstated.
description: Published in Nature Astronomy as an Article on 11 January 2021. The published version is available at https://www.nature.com/articles/s41550-020-01268-x (DOI 10.1038/s41550-020-01268-x)
CAPOS: The bulge Cluster APOgee Survey V. Elemental abundances of the bulge globular cluster HP 1
Creators: name: Henao, Lady
name: Villanova, Sandro
name: Geisler, Doug
name: Fernández-Trincado, José G.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have performed a detailed abundance analysis of 10 red giant members of the heavily obscured bulge globular cluster HP~1 using high-resolution, high S/N near-infrared spectra collected with the Apache Point Observatory Galactic Evolution Experiment II survey (APOGEE-2), obtained as part of the bulge Cluster APOgee Survey (CAPOS). We investigate chemical abundances for a variety of species including the light (C,N), odd-Z (Al), $α$ (O,Mg,Si,S,Ca and Ti), Fe-peak (Ni,Fe), and neutron-capture (Ce) elements. The derived mean cluster metallicity is [Fe/H]$=-1.15\pm0.03$, with no evidence for an intrinsic metallicity spread. HP~1 exhibits a typical $α$-enrichment that follows the trend for similar metallicity Galactic GCs, such as NGC~288 and NGC~5904, although our [Si/Fe] abundances are relatively high. We find a significant nitrogen spread ($\sim 1$ dex), and a large fraction of nitrogen-enhanced ([N/Fe]$>+0.7$) stars that populate the cluster. We also detect intrinsic star-to-star spreads in [C/Fe], [O/Fe], [Al/Fe], and [Ca/Fe], which are (anti)correlated with several chemical species, indicating the prevalence of the multiple-population phenomenon in HP 1. We have uncovered for the first time a possible correlation between Ca and Al, although the sample is small. The mean $\langle$[Mg/Fe]$\rangle = +0.29$ and $\langle$[Al/Fe]$\rangle = +0.46$ place HP~1 into the region dominated by \textit{in-situ} GCs, supporting the \textit{in-situ} nature of this cluster.
description: 11 pages, 7 figures, 3 tables. Accepted for publication in Astronomy & Astrophysics
Spatially resolved X-ray spectra of NGC 4258
Creators: name: Yang, Y.
name: Li, B.
name: Wilson, A. S.
name: Reynolds, C. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report a spatially resolved, X-ray spectral analysis of NGC 4258 using archival {\it Chandra} and {\it XMM-Newton} observations. The {\it XMM-Newton} spectra of the nuclear region are well described by two power-law components, a soft (0.57 keV) thermal component, and an Fe K$α$ line with EW = 40 $\pm$ 33 eV. The properties of the second, weaker power-law component are similar to those of an off-nuclear source $2.5\arcsec$ SW of the nucleus. The spectrum of the extended emission of the entire galaxy is well described by two thermal components (MEKAL) models with temperatures $\simeq 0.60$ and 0.22 keV. The {\it Chandra} and {\it XMM-Newton} spectra along the anomalous arms show that the absorbing column density to the SE anomalous arm is consistent with absorption by gas in our Galaxy, while the absorbing column to the NW anomalous arm is higher, indicating that the NW arm is partially on the far side of the galactic disk. The combined {\it Chandra} data clearly detect the X-ray emission from the hot spots at the end of the approximately N-S radio jets. By assuming the hot spots represent shocked thermal gas at the ends of the jets, we estimate shock powers of $\simeq 3 \times 10^{39} f^{-1/2}$ \ergps ($f $ is the filling factor), similar to the radiative power in the inner anomalous arms, consistent with the notion that the jets could be responsible for heating the gas in the anomalous arms.
description: ApJ accepted; High resolution version can be found at http://www.astro.umd.edu/~yyang/AGNs/MS70759v2-1.pdf