cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A LES-Langevin model for turbulence
Creators: name: Laval, Jean-Philippe
name: Dubrulle, Berengere
Publisher: name: arXiv
Year: 2006
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We propose a new model of turbulence for use in large-eddy simulations (LES). The turbulent force, represented here by the turbulent Lamb vector, is divided in two contributions. The contribution including only subfilter fields is deterministically modeled through a classical eddy-viscosity. The other contribution including both filtered and subfilter scales is dynamically computed as solution of a generalized (stochastic) Langevin equation. This equation is derived using Rapid Distortion Theory (RDT) applied to the subfilter scales. The general friction operator therefore includes both advection and stretching by the resolved scale. The stochastic noise is derived as the sum of a contribution from the energy cascade and a contribution from the pressure. The LES model is thus made of an equation for the resolved scale, including the turbulent force, and a generalized Langevin equation integrated on a twice-finer grid. The model is validated by comparison to DNS and is tested against classical LES models for isotropic homogeneous turbulence, based on eddy viscosity. We show that even in this situation, where no walls are present, our inclusion of backscatter through the Langevin equation results in a better description of the flow.
description: 18 pages, 14 figures, to appear in Eur. Phys. J. B
title: Η ψηφιακή εκστρατεία ενημέρωσης του Υπουργείου Υγείας στα social media στα πλαίσια προστασίας της δημόσιας υγείας και της αποτροπής της διασποράς του κορωναϊού Sars-CoV-2 (COVID – 19)
title: The digital campaigns of the Greek Ministry of Health in social media, about the protection of public health and the prevention of spreading Sars Cov-2 (Covid-19)
titleType: AlternativeTitle
Creators: name: Λίτου, Αντιγόνη
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: Social media
Covid-19
Digital marketing
Digital campaign
Μέσα κοινωνικής δικτύωσης
Ψηφιακό μάρκετινγκ
Κοινωνικό μάρκετινγκ
Ψηφιακή καμπάνια
Υπουργείο Υγείας
Δημόσια υγεία
Κοινωνικά δίκτυα

description: Η διπλωματική εργασία εκπονήθηκε με σκοπό την διερεύνηση της αποτελεσματικότητας των εκστρατειών ενημέρωσης του Υπουργείου Υγείας μέσω των κοινωνικών δικτύων ( social media platforms), για την εμπέδωση των μέτρων προστασίας και αποφυγής διασποράς του κορωναϊού Covid-19. Σε μια εποχή που η ψηφιακή ανάπτυξη είναι αλματώδης και ο ψηφιακός μετασχηματισμός κινείται με ταχείς ρυθμούς, η ανθρωπότητα για πρώτη φορά στην ιστορία της έχει την δυνατότητα διάδοσης και ανταλλαγής πληροφοριών με μεγάλη ταχύτητα, εν καιρώ πανδημίας. Οι πλατφόρμες κοινωνικής δικτύωσης είναι ένας σημαντικός τρόπος για την επίτευξη αυτού του σκοπού καθώς καταργεί γεωγραφικά σύνορα και χρονικά περιθώρια. Τα κοινωνικά δίκτυα είναι εργαλεία του ψηφιακού μάρκετινγκ και η υπεύθυνη χρήση τους μπορεί να εξυπηρετήσει και κοινωνικούς σκοπούς, πέραν από εμπορικούς, όπως έγκυρη , αξιόπιστη και υπεύθυνη ενημέρωση με την διάδοση ιατρικών πληροφοριών και δεδομένων για την προφύλαξη της Δημόσιας Υγείας. Στη παρούσα διπλωματική εργασία, θα εξετάσουμε τον βαθμό χρήσης των κοινωνικών δικτύων από τους πολίτες, την επίδραση των εκστρατειών ενημέρωσης επίσημου κρατικού φορέα καθώς και το βαθμό που καλυφθήκαν οι πολίτες από αυτήν . Για την επίτευξη των παραπάνω , διερευνήθηκαν σε θεωρητικό επίπεδο στα πλαίσια δευτερογενούς έρευνας, με την χρήση της βιβλιογραφικής ανασκόπησής ( βιβλία, άρθρα εφημερίδων και περιοδικών, papers, έρευνες, στατιστικά στοιχεία, ηλεκτρονικές πήγες) , έννοιες της επιστήμης του μάρκετινγκ και διενεργήθηκε πρωτογενής ποσοτική έρευνα με την μέθοδο του ερωτηματολογίου ,τα αποτελέσματα της οποίας παρουσιάζονται στο ερευνητικό μέρος της εργασίας και αναλύοντας τα φανερώνεται ότι οι πολίτες θεωρούν την ενημέρωση από τον κρατικό φορέα στα social media αξιόπιστη και χρήσιμη, αλλά δεν ακολουθούν στην πλειονότητα τους τις σελίδες του και δεν αλληλεπιδρούν σε αυτές.
Representation Learning on Hyper-Relational and Numeric Knowledge Graphs with Transformers
Creators: name: Chung, Chanyoung
name: Lee, Jaejun
name: Whang, Joyce Jiyoung
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: A hyper-relational knowledge graph has been recently studied where a triplet is associated with a set of qualifiers; a qualifier is composed of a relation and an entity, providing auxiliary information for a triplet. While existing hyper-relational knowledge graph embedding methods assume that the entities are discrete objects, some information should be represented using numeric values, e.g., (J.R.R., was born in, 1892). Also, a triplet (J.R.R., educated at, Oxford Univ.) can be associated with a qualifier such as (start time, 1911). In this paper, we propose a unified framework named HyNT that learns representations of a hyper-relational knowledge graph containing numeric literals in either triplets or qualifiers. We define a context transformer and a prediction transformer to learn the representations based not only on the correlations between a triplet and its qualifiers but also on the numeric information. By learning compact representations of triplets and qualifiers and feeding them into the transformers, we reduce the computation cost of using transformers. Using HyNT, we can predict missing numeric values in addition to missing entities or relations in a hyper-relational knowledge graph. Experimental results show that HyNT significantly outperforms state-of-the-art methods on real-world datasets.
description: 11 pages, 5 figures, 12 tables. 29th ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD 2023). This version includes updated results after fixing a bug
Branching random walks in random environment: a survey
Creators: name: König, Wolfgang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J80, 60J55, 60F10, 60K37

description: We consider branching particle processes on discrete structures like the hypercube in a random fitness landscape (i.e., random branching/killing rates). The main question is about the location where the main part of the population sits at a late time, if the state space is large. For answering this, we take the expectation with respect to the migration (mutation) and the branching/killing (selection) mechanisms, for fixed rates. This is intimately connected with the parabolic Anderson model, the heat equation with random potential, a model that is of interest in mathematical physics because of the observed prominent effect of intermittency (local concentration of the mass of the solution in small islands). We present several advances in the investigation of this effect, also related to questions inspired from biology.
description: This text will appear as a chapter in the proceedings volume of the DFG Priority Programme 1590 {\em Probabilistic Structures in Evolution}
An energy-based natural selection model
Creators: name: Abadi, N.
name: Abramson, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Genetic information and environmental factors determine the path of an individuals life and therefore, the evolution of its entire species. We have succeeded in proposing and studying a model that captures this idea. In our model, a renewable resource extended throughout the environment provides the energy necessary to sustain life, including movement and reproduction. Since the resource doesn't regrow immediately, it generates competition between individuals and therefore provides a natural selection pressure from which evolution of the genetic traits is observed. As a result of this, several phenomena characteristic of living systems emerge from this model without having to introduce them explicitly. These include speciation and punctuated equilibrium, competitive exclusion, and altruistic behaviour from selfish rules.
title: Τακτικές προώθησης ειδών οικιακού εξοπλισμού σε ανδρικό κοινό μέσω διαδικτύου
title: Tactics for promoting household products to a male audience via the internet
titleType: AlternativeTitle
Creators: name: Μασσαλή, Ευαγγελία
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: Είδη οικιακού εξοπλισμού
Διαδίκτυο
Άνδρες
Καταναλωτές
Αγοραστική συμπεριφορά
Διαδικτυακές αγορές

description: Η παρούσα διπλωματική εργασία εκπονήθηκε στα πλαίσια του προγράμματος μεταπτυχιακών σπουδών «Διοίκηση Επιχειρήσεων MBA» της Σχολής Διοικητικών, Οικονομικών και Κοινωνικών Επιστημών, του τμήματος Διοίκησης Επιχειρήσεων του Πανεπιστημίου Δυτικής Αττικής υπό την επίβλεψη της καθηγήτριας Δρ. Ανδρονίκης Κάβουρα. Σκοπός της εργασίας ήταν να αναζητηθούν ορισμένες τακτικές που θα μπορούσαν να εφαρμόσουν εταιρείες με είδη οικιακού εξοπλισμού που δραστηριοποιούνται στην Ελλάδα για να προσελκύσουν μέσω διαδικτύου άνδρες καταναλωτές. Διεξήχθη ποσοτική έρευνα με διανομή ερωτηματολογίου μέσω διαδικτύου σε άνδρες, καθώς και βιβλιογραφική έρευνα βασισμένη σε ελληνική και ξένη βιβλιογραφία. Το δείγμα που συγκεντρώθηκε ήταν 168 (Ν=168). Τα δεδομένα αναλύθηκαν με τη βοήθεια του στατιστικού πακέτου SPSS (Statistical Package for Social Sciences) και με τη βοήθεια του MS EXCEL. Σύμφωνα με τα αποτελέσματα της έρευνας προκύπτει ότι οι άνδρες πλοηγούνται στο διαδίκτυο αρκετές ώρες καθημερινά και περισσότερες τα Σαββατοκύριακα. Δείχνουν ιδιαίτερη προτίμηση σε ιστοσελίδες ενημερωτικού περιεχομένου και στα social media, από τα οποία προτιμούν το Facebook και το YouTube. Η παρούσα έρευνα αποκάλυψε, επίσης, ότι το δείγμα μας χωρίζεται σε δύο σχεδόν ισομεγέθεις κατηγορίες καταναλωτών. Η μία προτιμά τα προϊόντα οικιακού εξοπλισμού να παρουσιάζονται στο διαδίκτυο σύντομα και απλά, ενώ η άλλη αναλυτικά.
Interfacing biology, category theory and mathematical statistics
Creators: name: Pastor, Dominique
name: Beurier, Erwan
name: Ehresmann, Andrée
name: Waldeck, Roger
Publisher: name: arXiv
Year: 2020
Subjects: subject: Category Theory (math.CT)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Motivated by the concept of degeneracy in biology (Edelman, Gally 2001), we establish a first connection between the Multiplicity Principle (Ehresmann, Vanbremeersch 2007) and mathematical statistics. Specifically, we exhibit two families of statistical tests that satisfy this principle to achieve the detection of a signal in noise.
description: In Proceedings ACT 2019, arXiv:2009.06334
title: Το κλασσικό μοντέλο της θεωρίας κινδύνου με εξάρτηση και στρατηγικές μερισμάτων
title: The classical risk model with dependence and dividend strategies
titleType: AlternativeTitle
Creators: name: Πατήρη, Ιωάννα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2021
Subjects: subject: Κλασσικό μοντέλο θεωρίας κινδύνου
subject: Εξάρτηση μερισμάτων

description: Σκοπός αυτής της διατριβής είναι η μελέτη του κλασσικού μοντέλου της θεωρίας κινδύνου θεωρώντας μία δομή εξάρτησης μεταξύ των ενδιάμεσων χρόνων των απαιτήσεων και των αντίστοιχων μεγεθών απαίτησης. Η εξάρτηση περιγράφεται μέσω της συνήθους σύζευξης (copula) των FGM. Θα δοθούν θεωρητικά απλά αποτελέσματα και αναλυτικοί τύποι υπολογισμού διαφόρων μέτρων χρεοκοπίας μελετώντας την κλασσική αναμενόμενη προεξοφλημένη συνάρτηση ποινής των Gerber-Shiu, θεωρώντας την ύπαρξη ή μη διαφόρων στρατηγικών μερίσματος στη στοχαστική διαδικασία πλεονάσματος.
Initial Reports of the Deep Sea Drilling Project - Volume 88
Creators: name: Duennebier, F.K.
name: Stephen, R.
name: Gettrust, J.F.
name: The Leg 88 Science Party
Publisher: name: U.S. Government Printing Office
Year: 1987
Subjects: Deep Sea Drilling Project
Glomar Challenger
DSDP
Leg 88
Site 581
Northwest Pacific Ocean
Aleutian-Kurile seismic zone
Pacific Plate
Marine Seismic System

description: This volume covers Leg 88 of the cruises of the Drilling Vessel Glomar Challenger. The northwest Pacific Ocean is the most active earthquake zone in the world. More than 20% of the world's seismic energy is released in the Aleutian-Kurile seismic zones, where the Pacific Plate is actively being subducted. Seismic systems placed on islands in the Aleutians and in Japan are on the overriding plate and are thus subject to the high noise levels and complexities of island arc structure. Islands on the Pacific Plate, such as Midway and Wake, tend to be seismically noisy and are relatively far from the sources of activity. Ocean bottom seismometers are temporary, subject to ocean current noise, and can be poorly coupled to the ocean floor. The prime objective of DSDP Leg 88 was to deploy two permanent borehole seismometers in the seafloor off the Kuriles. The first priority was to deploy a three-component seismometer, the Marine Seismic System (MSS), built by the Defense Advanced Research Projects Agency (DARPA), in a reentry hole at DSDP Site 581. The Hawaii Institute of Geophysics (HIG) seismic system was to be placed in a hole nearby and a hole was to be piston cored for paleoenvironmental studies. No logging was planned but tests on a wireline reentry system were made. Leg 88 began in Hakodate, Japan in August 1982 and ended in Yokohama, Japan in September 1982.
title: Φορολογία - Φοροδιαφυγή - Αποτελεσματικότητα είσπραξης δημοσίων εσόδων: μελέτη περίπτωσης ο τομέας του τουρισμού
title: Taxation - Tax evasion - Effective collection of public revenues: case study - the greek tourism sector
titleType: AlternativeTitle
Creators: name: Πασχάλογλου, Ευαγγελία
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: Φορολογία
Φοροδιαφυγή
Φόροι
Τουριστικός τομέας
Δημόσια έσοδα
Tax evasion
Taxation

description: Είναι γεγονός, ότι η φορολογία αποτελεί ένα σημαντικό μέσο το οποίο συνδέεται με την άσκηση δημοσιονομικής πολιτικής, έτσι ώστε να είναι σε θέση το κράτος να μπορεί να εντοπίζει πόρους, οι οποίοι θα χρησιμοποιούνται για τη χρηματοδότηση των αναγκών του, καθώς και να διαθέτει στην κοινωνία δωρεάν δημόσια αγαθά. Αντίστοιχα, ολοένα και περισσότερο διάχυτη θα είναι η προσπάθεια διαρκώς και περισσότερων πολιτών στο να προβούν σε κινήσεις απόκρυψης τμήματος του εισοδήματός τους, είτε για λόγους που υπαγορεύονται από σκοπιμότητα των ατόμων είτε για λόγους που συνδέονται με αδυναμία πληρωμής των επιβαλλόμενων φόρων τους. Είναι επίσης γεγονός, ότι τόσο η παραβατικότητα όσο και η φοροδιαφυγή είναι ζητήματα διαχρονικής φύσεως, τα οποία εξαιτίας της οικονομικής κρίσης έχουν εμφανίσει σημαντική διόγκωση. Όμως σε κάθε περίπτωση η απόκρυψη της φορολογητέας ύλης ενός τμήματος του εισοδήματος των πολιτών αποτελεί σημαντική απώλεια κρατικών εσόδων. Στην παρούσα εργασία επιχειρήθηκε μια ανάλυση του φαινομένου της φοροδιαφυγής και της φοροαποφυγής τόσο συνολικά στην Ελλάδα όσο και πιο συγκεκριμένα στον κλάδο του τουρισμού. Ειδικότερα, σχετικά με το πεδίο του τουρισμού, ένα βασικό συμπέρασμα το οποίο εξάχθηκε από την ανάλυση των απαντήσεων των συμμετεχόντων στην έρευνά μας είναι το γεγονός, ότι η μείωση της φορολογίας θα συμβάλει στην μείωση της φοροδιαφυγής στον τουριστικό τομέα, ενώ και η παροχή κινήτρων και φοροελαφρύνσεων στις επιχειρήσεις του τουριστικού τομέα που επλήγησαν από τον COVID 19 θα επηρεάσουν θετικά ως προς την αντιμετώπιση της φοροδιαφυγής. Επίσης, ένα σημαντικό μέτρο που πρέπει να εφαρμοστεί αρχής γενομένης από τη φετινή χρονιά είναι η ανάγκη σημαντικής ενίσχυσης του αριθμού των επιτόπιων ελέγχων στις τουριστικές επιχειρήσεις από υπαλλήλους της ΑΑΔΕ, καθώς σύμφωνα με την έρευνά μας το εν λόγω μέτρο θα συμβάλει σε μεγάλο βαθμό στην περιστολή του φαινομένου της φοροδιαφυγής στον τουριστικό τομέα και θα αποτελέσει μια καλή πρακτική για την καταπολέμηση του φαινομένου της φοροδιαφυγής συνολικά στην Ελλάδα, επεκτεινόμενο και σε άλλους κλάδους πέραν του κλάδου του τουρισμού.
Analytic continuation of eigenvalues of a quartic oscillator
Creators: name: Eremenko, Alexandre
name: Gabrielov, Andrei
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: Complex Variables (math.CV)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 34M35, 35J10

description: We consider the Schrodinger operator on the real line with even quartic potential and study analytic continuation of eigenvalues, as functions of the coefficient of the potential. We prove several properties of this analytic continuation conjectured by Bender, Wu, Loeffel and Martin. 1. All eigenvalues are given by branches of two multi-valued analytic functions, one for even eigenfunctions and one for odd ones. 2. The only singularities of these multi-valued functions in the complex plane are algebraic ramification points, and there are only finitely many singularities over each compact subset of the plane.
description: 40 pages, 11 figures
Morphology-dependent trends of galaxy age with environment in Abell 901/902 seen with COMBO-17
Creators: name: Wolf, C.
name: Gray, M. E.
name: Aragon-Salamanca, A.
name: Lane, K. P.
name: Meisenheimer, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate correlations between galaxy age and environment in the Abell 901/2 supercluster for separate morphologies. Using COMBO-17 data, we define a sample of 530 galaxies, complete at $M_V -5\log h
description: Accepted for publication in MNRAS (Letters)
COVID-19 Detection from Exhaled Breath
Creators: name: Bellarmino, Nicolo
name: Bozzini, Giorgio
name: Cantoro, Riccardo
name: Castelletti, Francesco
name: Castelluzzo, Michele
name: Ciricugno, Carla
name: Correale, Raffaele
name: Gasperina, Daniela Dalla
name: Dentali, Francesco
name: Poggialini, Giovanni
name: Salerno, Piergiorgio
name: Squillero, Giovanni
name: Taborelli, Stefano
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: The SARS-CoV-2 coronavirus emerged in 2019, causing a COVID-19 pandemic that resulted in 7 million deaths out of 770 million reported cases over the next four years. The global health emergency called for unprecedented efforts to monitor and reduce the rate of infection, pushing the study of new diagnostic methods. In this paper, we introduce a cheap, fast, and non-invasive detection system, which exploits only the exhaled breath. Specifically, provided an air sample, the mass spectra in the 10--351 mass-to-charge range are measured using an original nano-sampling device coupled with a high-precision spectrometer; then, the raw spectra are processed by custom software algorithms; the clean and augmented data are eventually classified using state-of-the-art machine-learning algorithms. An uncontrolled clinical trial was conducted between 2021 and 2022 on some 300 subjects who were concerned about being infected, either due to exhibiting symptoms or having quite recently recovered from illness. Despite the simplicity of use, our system showed a performance comparable to the traditional polymerase-chain-reaction and antigen testing in identifying cases of COVID-19 (that is, 0.95 accuracy, 0.94 recall, 0.96 specificity, and 0.92 F1-score). In light of these outcomes, we think that the proposed system holds the potential for substantial contributions to routine screenings and expedited responses during future epidemics, as it yields results comparable to state-of-the-art methods, providing them in a more rapid and less invasive manner.
Benchmarking Faddeev and transfer-to-the-continuum calculations for (p, pN ) reactions
Creators: name: Gomez-Ramos, M.
name: Deltuva, A.
name: Moro, A. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Nucleon-knockout reactions on proton targets (p, pN ) have experienced a renewed interest due to the availability of inverse-kinematics experiment with exotic nuclei. Various theoretical descriptions have been used to describe these reactions, such as the Distorted-Wave Impulse Approximation (DWIA), the Faddeev-type formalism and the Transfer to the Continuum method. Our goal is to benchmark the observables computed with the Faddeev and Transfer to the Continuum formalisms in the intermediate energy regime relevant for the experimental (p, pn) and (p, 2p) studies. In this paper, we analyze the 11 Be(p,pn)10Be reaction for different beam energies, binding energies and orbital quantum numbers with both formalisms to assess their agreement for different observables. We obtain a good agreement in all cases considered, within 10%, when the input potentials are taken consistently and realistically.
description: 9 pages, 15 figures, accepted in Physical Review C
title: Τεχνικές τεμαχισμού δικτύων (network slicing) - σύγχρονες τάσεις σε επίπεδο παρόχων
title: Network slicing techniques - modern trends at the provider level
titleType: AlternativeTitle
Creators: name: Ματσουκάς, Σταύρος
name: Κολαρετάκης, Εμμανουήλ
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: 5G
Network Slicing
SDN
NFV
FlowVisor

description: Η παρούσα διπλωματική εργασία έχει ως αντικείμενο την τεχνική του τεμαχισμού δικτύων. Πρόκειται για μία τεχνική που κρίνεται απαραίτητη για την ανάπτυξη των κινητών δικτύων 5ης γενιάς. Η τεχνική αυτή επιτρέπει τη δημιουργία πολλών ανεξάρτητων λογικών δικτύων, πάνω από μία κοινή φυσική δικτυακή υποδομή. Με τον τρόπο αυτό, μπορούν σε ένα δίκτυο να φιλοξενούνται υπηρεσίες με πολύ διαφορετικά χαρακτηριστικά και απαιτήσεις. Η τεχνική προσεγγίζεται τόσο σε θεωρητικό όσο και σε πρακτικό επίπεδο. Στο πλαίσιο του πρακτικού μέρους της διπλωματικής, παρέχονται αναλυτικές οδηγίες για τη διεξαγωγή ενός εργαστηρίου επίδειξης της τεχνικής του τεμαχισμού δικτύων.
On the faces of unigraphic $3$-polytopes
Creators: name: Maffucci, Riccardo W.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C10, 05C40, 05C75, 05C76, 05C07, 05C62, 05C85, 52B05, 52B10

description: A $3$-polytope is a $3$-connected, planar graph. It is called unigraphic if it does not share its vertex degree sequence with any other $3$-polytope, up to graph isomorphism. The classification of unigraphic $3$-polytopes appears to be a difficult problem.
 In this paper we prove that, apart from pyramids, all unigraphic $3$-polytopes have no $n$-gonal faces for $n\geq 10$. Our method involves defining several planar graph transformations on a given $3$-polytope containing an $n$-gonal face with $n\geq 10$. The delicate part is to prove that, for every such $3$-polytope, at least one of these transformations both preserves $3$-connectivity, and is not an isomorphism.
Dynamics of self-accelerating electron beams in a homogeneous magnetic field
Creators: name: Goutsoulas, Michael
name: Efremidis, Nikolaos K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We examine the dynamics of electron beams that, in free space, are self-accelerating, in the presence of an additional magnetic field. We focus our attention in the case of Airy beams that follow parabolic trajectories and in generalized classes of beams associated with power-law trajectories. We study the interplay between beam self-acceleration and the circular motion caused by the magnetic field. In the case of Airy beams, using an integral representation, we find closed-form solutions for the electron wavefunction. We also derive asymptotic formulas for the beam trajectories both for Airy beams and for self-accelerating power-law beams. A ray optics description is rather useful for the interpretation of the beam dynamics. Our results are in excellent comparison with direct numerical simulations.
Anomalous Hall effect in Fe/Cu bilayers
Creators: name: Xu, W. J.
name: Zhang, B.
name: Wang, Z.
name: Chu, S.
name: Li, W.
name: Yu, R. H.
name: Zhang, X. X.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The scaling of anomalous Hall resistivity on the longitudinal resistivity has been intensively studied in the different magnetic systems, including multilayers and granular films, to examine which mechanism, skew scattering or side-jump, dominates. The basis of the scaling law is that both the resistivities are due to the electron scattering at the imperfections in the materials. By studying of anomalous Hall effect (AHE) in the simple Fe/Cu bilayers, we demonstrate that the measured anomalous Hall effect should not follow the scaling laws derived from skew scattering or side-jump mechanism due to the short-circuit and shunting effects of the non-magnetic layers.
description: 12 pages, 4 figures; http://www.springerlink.com/content/1718722u75j24587/
Crystalline Ni nanoparticles as the origin of ferromagnetism in Ni implanted ZnO crystals
Creators: name: Zhou, Shengqiang
name: Potzger, K.
name: Zhang, Gufei
name: Eichhorn, F.
name: Skorupa, W.
name: Helm, M.
name: Fassbender, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the structural and magnetic properties of ZnO single crystals implanted at 623 K with up to 10 at. % of Ni. As revealed by X-ray diffraction, crystalline fcc-Ni nanoparticles were formed inside ZnO. The magnetic behavior (magnetization with field reversal and with different temperature protocol) of all samples is well explained by a magnetic Ni-nanoparticle system. Although the formation of Ni:ZnO based diluted magnetic semiconductor cannot be ruled out, the major contribution to the magnetic properties stems from crystalline nanoparticles synthesized under these implantation conditions.
description: 15 pages, 4 figures, to be published at J. Appl. Phys
A differential identity for Green functions
Creators: name: Brouder, Christian
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: If P is a differential operator with constant coefficients, an identity is derived to calculate the action of exp(P) on the product of two functions. In many-body theory, P describes the interaction Hamiltonian and the identity yields a hierarchy of Green functions. The identity is first derived for scalar fields and the standard hierarchy is recovered. Then the case of fermions is considered and the identity is used to calculate the generating function for the Green functions of an electron system in a time-dependent external potential.
description: 14 pages
Lexical elicitation: voice quality; Mann 1-118
Creators: name: Tonprathum, Bunthom
name: Tonprathum, Sompong
name: Lau-Preechathammarach, Raksit Tyler
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: thm

description: Elicitation of words differing only in voice quality (modal, breathy, creaky) and words from Mann's MSEA Swadesh list 1-118. Other voices included. Recorded using Praat on a Macbook Pro from early 2011. Consultant Bunthom Tonprathum is a 54-year-old male and is the main consultant in this recording.
The construction of cosmopolitan identifications among 'third culture kids' in two international schools
Creators: name: Desilets, Gabrielle
Publisher: name: The Australian National University
Year: 2014

description: This thesis looks at the life trajectories of serial migrants' children or 'Third Culture Kids' (TCKs) to explore how a transnational upbringing affects the homology between identity and place and leads to the construction of cosmopolitan identifications. Drawing on multi-sited ethnographic research in and around the communities of two International Baccalaureate (IBO) schools in Melbourne, Australia and in Singapore, this thesis details the everyday practices (eating, commuting, dwelling, leisure), forms of sociability (family and friendship ties and obligations, socialising and networking), and forms of identification (lifestyle choices, habitus and taste, self-representation) common among TCKs. Situated within the transnational migration literature, this project contributes to the empirical research on cosmopolitanism and on privileged migration. I explore the impact of high mobility and a transient upbringing on the construction of cosmopolitan identifications among my participants. Unlike traditional migration research that has examined migrants' relation to their 'home' or 'host' cultures, this thesis looks at TCKs' shared patterns of settlement rather than their points of departure or of arrival. By avoiding binary categories that oppose the 'local' to the 'global' and instead exploring the human face of skilled migration through the study of everyday life, this thesis sheds light on the myriad ways in which TCKs are enmeshed in complex webs of both local and global attachments and networks. Taking a comparative approach, I explore how the different cultural repertoires and political conjunctures present in each local context influence my participants' experience in two global cities. Through the investigation of international educational pathways and the spread of the discourse on internationalism, I observe how TCKs' identification is particularly marked by a discourse on distinction. I argue that in the current neoliberal socio-political landscape, global belonging can be experienced through membership in exclusive global middle-class transnational networks such as those that my research participants design and sustain. This research contributes to the theorisation on the emergence of post-national discourse and identification, while remaining attentive to the powerful and continuing impact of the nation-state as a dominant principle of social organisation. I argue that the construction of cosmopolitan identification is determined by the experience of difference, defined against the quotidian imperatives of ethnicity and national borders, which in turn are challenged by the emerging global culture of transnational migrants.
Catalysis in Quantum Information Theory
Creators: name: Lipka-Bartosik, Patryk
name: Wilming, Henrik
name: Ng, Nelly H. Y.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Catalysts open up new reaction pathways that can speed up chemical reactions while not consuming the catalyst. A similar phenomenon has been discovered in quantum information science, where physical transformations become possible by utilizing a quantum degree of freedom that returns to its initial state at the end of the process. In this review, a comprehensive overview of the concept of catalysis in quantum information science is presented and its applications in various physical contexts are discussed.
description: Review paper; Close to published version
Lexical elicitation: voice quality; Mann 1-118
Creators: name: Tonprathum, Sompong
name: Tonprathum, Thiwa
name: Lau-Preechathammarach, Raksit Tyler
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: thm

description: Elicitation of words differing only in voice quality (modal, breathy, creaky) and words from Mann's MSEA Swadesh list 1-118. Other voices included. Recorded using Praat on a Macbook Pro from early 2011. Consultant Thiwa Tonprathum is a 45-year-old male and is the main consultant in this recording.
Is Cosmology Compatible with Blue Gravity Waves ?
Creators: name: Camerini, Roberta
name: Durrer, Ruth
name: Melchiorri, Alessandro
name: Riotto, Antonio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A primordial gravitational wave background with positive(blue) spectral index is expected in several non-standard inflationary cosmologies where the stress-energy tensor violates the null energy condition. Here we show that a sizable amount of blue gravitational waves is compatible with current cosmological and astrophysical data. So far most of the works on parameter estimation from cosmic microwave background data have assumed a negative or negligible spectral index. The present limits on cosmological parameters, especially on the scalar spectral index, widen up considerably when one allows also for blue tilts of the tensor spectrum. Since the amplitude of the CMB B-mode polarization is larger in these models, future data from Planck are likely to provide crucial measurements.
description: 5 Pages, 5 Figures
Quantum Bell Nonlocality is Entanglement
Creators: name: Sengupta, Kuntal
name: Zibakhsh, Rana
name: Chitambar, Eric
name: Gour, Gilad
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Bell nonlocality describes a manifestation of quantum mechanics that cannot be explained by any local hidden variable model. Its origin lies in the nature of quantum entanglement, although understanding the precise relationship between nonlocality and entanglement has been a notorious open problem. In this paper, we resolve this problem by developing a dynamical framework in which quantum Bell nonlocality emerges as special form of entanglement, and both are unified as resources under local operations and classical communication (LOCC). Our framework is built on the notion of quantum processes, which are abstract quantum channels mapping elements between fixed intervals in space and time. Entanglement is then identified as a quantum process that cannot be generated by LOCC while Bell nonlocality is the subset of these processes that have an instantaneous input-output delay time. LOCC pre-processing is a natural set of free operations in this theory, thereby enabling all entangled states to activate some form of Bell nonlocality. In addition, we generalize the CHSH witnesses from the state domain to the domain of entangled quantum measurements, and provide a systematic method to quantify the Bell nonlocality of a bipartite quantum channel.
description: 12 pages (main text) + 3 pages (appendix), 11 Figures, comments are welcome!
Journey within : the inward turn of the contemporary Chinese novel
Creators: name: Kong, Shuyu
Publisher: name: University of British Columbia
Year: 2009

description: This thesis examines the inward turn of the contemporary Chinese novel: a tendency in fictional narrative to move from representing social reality and political events from an "objective" point of view to exploring personal experience, especially the interior world of human beings, from a subjective point of view. I take three novels published in the early 1990s as examples: Yu Hua's Crying in the Fine Rain(1991), Ge Fei's On the Margins (1992), and Wang Anyi's Fact and Fiction: One Way to Create a World (1993). I demonstrate a new narrative mode emerging, with thematic innovations and formal changes, against the background of the collapse of Communist collectivist ideology and the "master narrative" of socialist realism. In these three works, first-person autobiographical narrators are employed to explore personal experience and private life, a space once repressed and forbidden in modern Chinese literature. Reflections on growing-up, personal memory of the past and the imaginative search for identity can thus be read allegorically as a Chinese Bildungsroman of the awakening consciousness of Self. This new narrative not only emphasizes the importance of inner territory, but also ushers in a subjective writing which has greatly altered the appearance and conception of the Chinese novel. Chronological line is broken up into a psychological temporal order; plot and event become obscured within mental scenes; and omniscient didactic voices are replaced by self-conscious, reflective minds. Such individualistic, modernist narratives challenge the former collective, socially-oriented "realist epics" produced since 1930s, providing an alternative form and function for the modern Chinese novel.
High-pressure synthesis and superconductivity of Ca2-xNaxCuO2Cl2
Creators: name: Zhigadlo, N. D.
name: Karpinski, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ca2-xNaxCuO2Cl2 is a structural analogue to the La2-xSrxCuO4 superconductor. By substituting Na+ for Ca2+ mobile holes are introduced into the CuO2 planes. A series of experiments shows that the Na content x depends not only on the pressure during synthesis but also on the synthesis temperature and time. Ca2-xNaxCuO2Cl2 crystals (x=0.10 and Tc,on=13.5 K) up to 1x1x0.05 mm3 have been grown by a flux method at 35 kbar and the temperature was slowly ramped from 1250 C to 1050 C within 8 h. Applying higher synthesis pressure (up to 55 kbar) and temperature (up to 1700 C) results in polycrystalline samples with highest Tc,on=28.0 K at x=0.20. Further experiments are under way to optimize conditions to grow crystals with extended concentration of Na and Tc characteristic for optomally doped and overdoped regions.
description: 2 pages, 4 figures, submitted to Physica C (M2S-HTSC 2006 Proceedings)
Compositional Models for Power Systems
Creators: name: Nolan, John S.
name: Pollard, Blake S.
name: Breiner, Spencer
name: Anand, Dhananjay
name: Subrahmanian, Eswaran
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: D.2.12; H.2.1; J.2; J.6

description: The problem of integrating multiple overlapping models and data is pervasive in engineering, though often implicit. We consider this issue of model management in the context of the electrical power grid as it transitions towards a modern 'Smart Grid.' We present a methodology for specifying, managing, and reasoning within multiple models of distributed energy resources (DERs), entities which produce, consume, or store power, using categorical databases and symmetric monoidal categories. Considering the problem of distributing power on the grid in the presence of DERs, we show how to connect a generic problem specification with implementation-specific numerical solvers using the paradigm of categorical databases.
description: In Proceedings ACT 2019, arXiv:2009.06334
A Novel Modeling and Simulation Approach for the Hindered Mobility of Charged Particles in Biological Hydrogels
Creators: name: Grill, Maximilian J.
name: Eichinger, Jonas F.
name: Koban, Jonas
name: Meier, Christoph
name: Lieleg, Oliver
name: Wall, Wolfgang A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: This article presents a novel computational model to study the selective filtering of biological hydrogels due to the surface charge and size of diffusing particles. It is the first model that includes the random 3D fiber orientation and connectivity of the biopolymer network and that accounts for elastic deformations of the fibers by means of beam theory. As a key component of the model, novel formulations are proposed both for the electrostatic and repulsive steric interactions between a spherical particle and a beam. In addition to providing a thorough validation of the model, the presented computational studies yield new insights into the underlying mechanisms of hindered particle mobility, especially regarding the influence of the aforementioned aspects that are unique to this model. It is found that the precise distribution of fiber and thus charge agglomerations in the network have a crucial influence on the mobility of oppositely charged particles and gives rise to distinct motion patterns. Considering the high practical significance for instance with respect to targeted drug release or infection defense, the provided proof of concept motivates further advances of the model toward a truly predictive computational tool that allows a case- and patient-specific assessment for real (biological) systems.
Orphan Articles: The Dark Matter of Wikipedia
Creators: name: Arora, Akhil
name: West, Robert
name: Gerlach, Martin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Social and Information Networks (cs.SI)
subject: Computers and Society (cs.CY)
subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: With 60M articles in more than 300 language versions, Wikipedia is the largest platform for open and freely accessible knowledge. While the available content has been growing continuously at a rate of around 200K new articles each month, very little attention has been paid to the accessibility of the content. One crucial aspect of accessibility is the integration of hyperlinks into the network so the articles are visible to readers navigating Wikipedia. In order to understand this phenomenon, we conduct the first systematic study of orphan articles, which are articles without any incoming links from other Wikipedia articles, across 319 different language versions of Wikipedia. We find that a surprisingly large extent of content, roughly 15\% (8.8M) of all articles, is de facto invisible to readers navigating Wikipedia, and thus, rightfully term orphan articles as the dark matter of Wikipedia. We also provide causal evidence through a quasi-experiment that adding new incoming links to orphans (de-orphanization) leads to a statistically significant increase of their visibility in terms of the number of pageviews. We further highlight the challenges faced by editors for de-orphanizing articles, demonstrate the need to support them in addressing this issue, and provide potential solutions for developing automated tools based on cross-lingual approaches. Overall, our work not only unravels a key limitation in the link structure of Wikipedia and quantitatively assesses its impact, but also provides a new perspective on the challenges of maintenance associated with content creation at scale in Wikipedia.
description: ICWSM 2024; 13 pages; 31 figures
Perilampus carolinensis Smulyan. Darling 1996
Creators: name: Yoo, Jeong Jae
name: Darling, D. Christopher
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Perilampidae
Perilampus
Perilampus carolinensis

description: Perilampus carolinensis clade
Fig. 1, IIb; Figs 3–8
Diagnosis. The species in this clade are recognized by the combination of the following states: parascrobal area abruptly narrowed slightly below the midlevel of the eye, about 0.4 EH above the lower eye margin (Figs 3I, 5I, 7I); the lower face below torulus with sparse and evenly distributed setae (Figs 3H, 5H, 7H); and the male scape with sparse pits (Figs 4F, 6F, 8G).
Included species. P. carolinensis, P. cabecar and P. minasgerais.
description: Published as part of Yoo, Jeong Jae & Darling, D. Christopher, 2025, Taxonomic revision of the Perilampus carolinensis species complex (Hymenoptera: Chalcidoidea: Perilampidae), and the description of five new species, pp. 151-195 in Zootaxa 5621 (2) on page 168, DOI: 10.11646/zootaxa.5621.2.1, http://zenodo.org/record/15262606
A novel method for unambiguous ion identification in mixed ion beams extracted from an EBIT
Creators: name: Meissl, W.
name: Simon, M. C.
name: Lopez-Urrutia, J. R. Crespo
name: Tawara, H.
name: Ullrich, J.
name: Winter, HP.
name: Aumayr, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: A novel technique to identify small fluxes of mixed highly charged ion beams extracted from an Electron Beam Ion Trap (EBIT) is presented and practically demonstrated. The method exploits projectile charge state dependent potential emission of electrons as induced by ion impact on a metal surface to separate ions with identical or very similar mass-to-charge ratio.
description: 8 pages, 5 figures
Lift of Invariant to Non-Invariant Solutions of Complex Monge-Ampère Equations
Creators: name: Sheftel, M. B.
name: Malykh, A. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 35Q75; 83C15

description: We show how partner symmetries of the elliptic and hyperbolic complex Monge-Ampère equations (CMA and HCMA) provide a lift of non-invariant solutions of three- and two-dimensional reduced equations, i.e., a lift of invariant solutions of the original CMA and HCMA equations, to non-invariant solutions of the latter four-dimensional equations. The lift is applied to non-invariant solutions of the two-dimensional Helmholtz equation to yield non-invariant solutions of CMA, and to non-invariant solutions of three-dimensional wave equation and three-dimensional hyperbolic Boyer-Finley equation to yield non-invariant solutions of HCMA. By using these solutions as metric potentials, it is possible to construct four-dimensional Ricci-flat metrics of Euclidean and ultra-hyperbolic signatures that have non-zero curvature tensors and no Killing vectors.
description: 15 pages, LaTeX2e
Hansenocaris undetermined
Creators: name: Olesen, Jørgen
name: Grygier, Mark J.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Maxillopoda
Hansenocarididae
Hansenocaris
Hansenocaris undetermined

description: Y-nauplius Type W
Figs 2, 11A–G
Material examined
JAPAN – Okinawa, Sesoko I., laboratory pier, 26°38ʹ09.4ʺ N, 127°51ʹ55.2ʺ E • 1 LSN; 1991–2005 • 9 LSN, 8 of which molted to cyprids; 2018–2019 (Tables 1 and S1).
Description
LAST-STAGE NAUPLIUS (LSN). Lecithotrophic. Body spoon-shaped in dorso-ventral view; about 1.8 times as long as wide; cephalic shield circular/ellipsoidal, with discontinuity in body outline leading into trunk. In lateral view, body axis bent downwards 30° with respect to cephalic axis. Length ca 250 µm (without dorso-caudal spine), greatest width ca 130 µm, greatest dorso-ventral thickness ca 80 µm. Labrum balloon-shaped, with surface divided into facets by cuticular ridges, midline produced into keel-like elevation, and free posterior margin bearing small median spine; pores not examined. Caudal end attenuate, terminating in 75–80 µm long, slightly dorsally curved dorso-caudal spine bearing small spines; spine upturned ca 20° to trunk axis and accompanied ventrally at base by pair of ca 10 µm long triangular furcal spines.
CYPRID VIEWED THROUGH CUTICLE OF LSN. Body overall weakly brownish-pigmented. Cephalon most often with two to four lipid vesicles along anterior margin and one to three laterally. Telson slightly longer than wide and about half as long as thorax, often with pair of distinct lipid vesicles.
Identification and variation
Recognizable by the combination of its general body shape, the balloon-shaped, keeled labrum with a spine on the posterior margin and the large, rather straight dorso-caudal spine flanked by relatively robust furcal spines. Variation is seen among nauplii in the form of the dorso-caudal spine (either broad-based and more or less straight or more slender and curved); in the morphology of the posterior margin of the labrum (spine sometimes absent/diminutive, margin sometimes weakly serrate); and among unmolted cyprids in the number of lipid vesicles.
Distribution
Japan (Sesoko Island, Okinawa).
description: Published as part of Olesen, Jørgen & Grygier, Mark J., 2024, Taxonomic diversity of marine planktonic ' y-larvae' (Crustacea: Facetotecta) from a coral reef hotspot locality (Japan, Okinawa), with a key to y-nauplii, pp. 1-90 in European Journal of Taxonomy 929 (1) on page 30, DOI: 10.5852/ejt.2024.929.2479, http://zenodo.org/record/10876286