cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Φιλία και έρωτας στην αρχαία Ελλάδα μέσα από τους διαλόγους του Πλάτωνα, «Λύσις», «Συμπόσιο», «Φαίδρος»:
Creators: name: Σταμουλάκη, Ουρανία Ευάγγελου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Ερωτας
Φιλία
Πλάτων
Friendship
Love
Platon

description: Το θέμα το οποίο πραγματεύεται η παρούσα διπλωματική εργασία είναι η φιλία και ο έρωτας στην αρχαία Ελλάδα. Πιο συγκεκριμένα, στόχος της εργασίας είναι τόσο η ανάλυση των διαλόγων του Πλάτωνα, Λύσι, Συμπόσιο, Φαίδρο αλλά και η άντληση πληροφοριών σχετικά με τις έννοιες της φιλίας και του έρωτα στην αρχαία Ελλάδα και κυρίως στην εποχή του Σωκράτη. Η εργασία χωρίζεται σε έξι μέρη: Στο πρώτο μέρος γίνεται μια προσπάθεια ανάλυσης των διαλόγων. Στο δεύτερο μέρος μια προσπάθεια να εντοπίσουμε το σημείο τομής των διαλόγων αυτών. Στο τρίτο μέρος θα σχολιάσουμε το σκηνικό των διαλόγων αυτών, για να εξετάσουμε αν είναι τυχαία η επιλογή του ή αν σχετίζεται άμεσα με το θέμα των διαλόγων. Στο τέταρτο μέρος γίνεται αναφορά στη φιγούρα του Σωκράτη και τη σαγηνευτική του προσωπικότητα, που επιδρούσε καταλυτικά στους νέους και όχι μόνο. Στο πέμπτο μέρος επιχειρείται μια προσέγγιση των όρων φιλία και έρωτα στην αρχαία Ελλάδα και την σημερινή εποχή. Τέλος, στον επίλογο, μια προσπάθεια ελέγχου της δυνατότητας εφαρμογής των θεωριών των εξεταζόμενων διαλόγων στη σύγχρονη κοινωνία και τονίζονται οι βασικές ομοιότητες του «πλατωνικού έρωτα» και της χριστιανικής αγάπης.
description: The subject of this essay is friendship and love in Ancient Greece. More specifically, the goal of this research is to analyse Platon’s dialogues Lysis, Symposium, Phaidros and also to collect valuable information on the concepts such as friendship and love in Ancient Greece and in particular in Socrates era. This essay is divided in six parts: The first part analyses the dialogues. The second part is an effort to locate the characteristics in common of those dialogues. The third part is to determine whether the background is chosen in random or it has to do with the dialogues themselves. The fourth part is about Socrates’ personality which had a strong influence on young people. The fifth part is a comparison between the concepts of love and friendship in ancient and modern Greece. Finally, the sixth part is an attempt to apply the theory of the dialogues in modern society and to locate the main similarities between “Platonic Love” and “Christian Love”.
Sonic Sculpture: Activating Engagement with Head-Mounted Augmented Reality
Creators: name: Martin, Charles Patrick
name: Liu, Zeruo
name: Wang, Yichen
name: He, Wennan
name: Gardner, Henry
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: H.5.5; H.5.1

description: This work examines how head-mounted AR can be used to build an interactive sonic landscape to engage with a public sculpture. We describe a sonic artwork, "Listening To Listening", that has been designed to accompany a real-world sculpture with two prototype interaction schemes. Our artwork is created for the HoloLens platform so that users can have an individual experience in a mixed reality context. Personal head-mounted AR systems have recently become available and practical for integration into public art projects, however research into sonic sculpture works has yet to account for the affordances of current portable and mainstream AR systems. In this work, we take advantage of the HoloLens' spatial awareness to build sonic spaces that have a precise spatial relationship to a given sculpture and where the sculpture itself is modelled in the augmented scene as an "invisible hologram". We describe the artistic rationale for our artwork, the design of the two interaction schemes, and the technical and usability feedback that we have obtained from demonstrations during iterative development.
Modelling Shock Heating in Cluster Mergers: I. Moving Beyond the Spherical Accretion Model
Creators: name: McCarthy, Ian G.
name: Bower, Richard G.
name: Balogh, Michael L.
name: Voit, G. Mark
name: Pearce, Frazer R.
name: Theuns, Tom
name: Babul, Arif
name: Lacey, Cedric G.
name: Frenk, Carlos S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abridged) The thermal history of the intracluster medium (ICM) is complex. Heat input from cluster mergers, AGN, and galaxy winds offsets and may even halt the cooling of the ICM. Consequently, the processes that set the properties of the ICM play a key role in determining how galaxies form. In this paper we focus on the shock heating of the ICM during cluster mergers, with the eventual aim of incorporating this mechanism into semi-analytic models of galaxy formation. We use a suite of hydrodynamic simulations to track the evolution of the ICM in idealised two-body mergers. We find the heating of the ICM can be understood relatively simply by considering the evolution of the gas entropy during the mergers. We examine the processes that generate the entropy in order to understand why previous analytic shock heating models failed. We find that: (1) The energy that is thermalised in the collision greatly exceeds the kinetic energy available when the systems first touch. The smaller system penetrates deep into the potential well before it is disrupted. (2) For unequal mass mergers, most of the energy is thermalised in the more massive component. The heating of the smaller system is minor and its gas sinks to the centre of the final system. (3) The bulk of the entropy generation occurs in two distinct episodes. The first episode occurs following core collision, when a shock wave is generated that propagates outwards from the centre. This causes the combined system to expand rapidly and overshoot hydrostatic equilibrium. The second episode occurs as this material is shock heated as it re-collapses. This revised model for entropy generation significantly improves our physical understanding of cosmological gas simulations.
description: 30 pages, 26 figures. MNRAS, accepted. For a version with high res figures see http://star-www.dur.ac.uk/~mccarthy/mergers_paperI/
Developing open standards for responsible data sharing
Creators: name: Rishi Nag
name: GA4GH
Publisher: name: F1000 Research Limited
Year: 2019

description: Through collaboration of a diverse group of institutions and organizations worldwide, the Global Alliance for Genomics and Health (GA4GH) creates frameworks and standards to enable the responsible, voluntary, and secure sharing of genomic and health-related data. This poster presents a snapshot of the approved GA4GH standards from July 2019. It includes the industry standards for read representation (CRAM), variant representation (VCF), a streaming API for receiving these standards (htsget), Cloud based processing standards (Workflow Execution Service), the Data Use Ontology for semantically tagging datasets with restrictions on usage, Beacon API for discovering variant data, and the refget API for retrieving the exact reference sequence required, removing naming ambiguities. These form part of a growing suite of standards from GA4GH, which enable FAIR principles to be applied to datasets.
title: Strategic ignorance in repeated prisoners’ dilemma experiments and its effects on the dynamics of voluntary cooperation
Creators: name: Bruttel, Lisa
name: Felgendreher, Simon
name: Güth, Werner
name: Hertwig, Ralph
Publisher: name: Universität Potsdam
Year: 2019

description: Being ignorant of key aspects of a strategic interaction can represent an advantage rather than a handicap. We study one particular context in which ignorance can be beneficial: iterated strategic interactions in which voluntary cooperation may be sustained into the final round if players voluntarily forego knowledge about the time horizon. We experimentally examine this option to remain ignorant about the time horizon in a finitely repeated two-person prisoners’ dilemma game. We confirm that pairs without horizon knowledge avoid the drop in cooperation that otherwise occurs toward the end of the game. However, this effect is superposed by cooperation declining more rapidly in pairs without horizon knowledge during the middle phase of the game, especially if players do not know that the other player also wanted to remain ignorant of the time horizon.
description: CEPA Discussion Papers, 10
Physics-Informed Echo State Networks
Creators: name: Doan, Nguyen Anh Khoa
name: Polifke, Wolfgang
name: Magri, Luca
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We propose a physics-informed Echo State Network (ESN) to predict the evolution of chaotic systems. Compared to conventional ESNs, the physics-informed ESNs are trained to solve supervised learning tasks while ensuring that their predictions do not violate physical laws. This is achieved by introducing an additional loss function during the training, which is based on the system's governing equations. The additional loss function penalizes non-physical predictions without the need of any additional training data. This approach is demonstrated on a chaotic Lorenz system and a truncation of the Charney-DeVore system. Compared to the conventional ESNs, the physics-informed ESNs improve the predictability horizon by about two Lyapunov times. This approach is also shown to be robust with regard to noise. The proposed framework shows the potential of using machine learning combined with prior physical knowledge to improve the time-accurate prediction of chaotic dynamical systems.
description: 10 pages, 11 figures. arXiv admin note: substantial text overlap with arXiv:1906.11122
Mapping String States into Partons: Form Factors and the Hadron Spectrum in AdS/QCD
Creators: name: de Teramond, Guy F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: New developments in holographic QCD are described in this talk in the context of the correspondence between string states in AdS and light-front wavefunctions of hadronic states in physical space-time.
description: 7 pages, 3 figures. Presented at Seventh Workshop on Continuous Advances in QCD, Minneapolis, May 11-14, 2006
On the Dotsenko-Fateev complex twin of the Selberg integral and its extensions
Creators: name: Neretin, Yury A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 33B15, 33C70

description: The Selberg integral has a twin (`the Dotsenko--Fateev integral') of the following form. We replace real variables $x_k$ in the integrand $\prod |x_k|^{σ-1}\,|1-x_k|^{τ-1} \prod|x_k-x_l|^{2θ}$ of the Selberg integral by complex variables $z_k$, integration over a cube we replace by an integration over the whole complex space $\mathbb{C}^n$. According to Dotsenko, Fateev, and Aomoto, such integral is a product of Gamma functions. We define and evaluate a family of beta integrals over spaces $\mathbb{C}^m\times \mathbb{C}^{m+1}\times \dots \times \mathbb{C}^n$, which for $m=n$ gives the complex twin of the Selberg integral mentioned above (with three additional integer parameters)
description: 15pages; typos are corrected; some proofs are extended
Length functions in Teichmüller and anti de Sitter geometry
Creators: name: Mazzoli, Filippo
name: Viaggi, Gabriele
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geometric Topology (math.GT)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C50, 57M50, 57K20

description: We establish a link between the behavior of length functions on Teichmüller space and the geometry of certain anti de Sitter 3-manifolds. As an application, we give new purely anti de Sitter proofs of results of Teichmüller theory such as (strict) convexity of length functions along shear paths and geometric bounds on their second variation along earthquakes. Along the way, we provide shear-bend coordinates for Mess' anti de Sitter 3-manifolds.
description: 39 pages. Comments are welcome!
High-Energy Neutrinos from Gamma-Ray-Faint Accretion-Powered Hypernebulae
Creators: name: Sridhar, Navin
name: Metzger, Brian D.
name: Fang, Ke
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Hypernebulae are inflated by accretion-powered winds accompanying hyper-Eddington mass transfer from an evolved post-main sequence star onto a black hole or neutron star companion. The ions accelerated at the termination shock -- where the collimated fast disk winds/jet collide with the slower, wide-angled wind-fed shell -- can generate high-energy neutrinos via hadronic ($pp$) reactions, and photohadronic ($pγ$) interactions with the disk thermal and Comptonized nonthermal background photons. It has been suggested that some fast radio bursts (FRBs) may be powered by such short-lived jetted hyper-accreting engines. Although neutrino emission associated with the ms-duration bursts themselves is challenging to detect, the persistent radio counterparts of some FRB sources -- if associated with hypernebulae -- could contribute to the high energy neutrino diffuse background flux. If the hypernebula birth rate follows that of steller-merger transients and common envelope events, we find that their volume-integrated neutrino emission -- depending on the population-averaged mass-transfer rates -- could explain up to $\sim25\%$ of the high-energy diffuse neutrino flux observed by the IceCube Observatory and the Baikal-Gigaton Volume Detector (GVD) Telescope. The time-averaged neutrino spectrum from hypernebula -- depending on the population parameters -- can also reproduce the observed diffuse neutrino spectrum. The neutrino emission could in some cases furthermore extend to >100 PeV, detectable by future ultra-high-energy neutrino observatories. The large optical depth through the nebula to Breit-Wheeler ($γγ$) interaction attenuates the escape of GeV-PeV gamma-rays co-produced with the neutrinos, rendering these gamma-ray-faint neutrino sources, consistent with the \textit{Fermi} observations of the isotropic gamma-ray background.
description: 20 pages, 10 figures, 1 table; accepted for publication in The ApJ
Ανίχνευση και εξαγωγή πληροφοριών από ιστότοπους ειδησεογραφίας με έμφαση στα κοινωνικά δίκτυα:
Creators: name: Βάλτσης, Νικόλαος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Ανίχνευση πληροφοριών
Ιστότοποι ειδησεογραφίας
Κοινωνικά δίκτυα
Information detection
News sites
Social networks

description: Η συγκεκριμένη διπλωματική εργασία σχετίζεται με κάποιες τεχνικές και μεθόδους που έχουν αναπτυχθεί για τη δημιουργία ιστότοπων συλλογής ειδησεογραφίας. Έτσι, γίνεται επισκόπηση θεμάτων σχετικά με ιστότοπους συλλογής ειδησεογραφίας, με την ανίχνευση πληροφοριών από διάφορες ιστοσελίδες του διαδικτύου, με τις «έξυπνες» μηχανές αναζήτησης, καθώς και με την εξαγωγή πληροφορίας από κείμενο. Επιπλέον, μελετώνται θέματα σχετικά με τη συλλογή ειδησεογραφίας στα κοινωνικά δίκτυα. Επιπρόσθετα, αναλύεται μια μέθοδος που μπορεί να χρησιμοποιηθεί στη δημιουργία και στην υλοποίηση ενός ιστότοπου συλλογής ειδησεογραφίας. Αυτό γίνεται με τη χρήση κάποιων προγραμμάτων για εξόρυξη ιστοσελίδων, δεικτοδότηση του κειμένου και αναζήτηση πληροφοριών από το κείμενο. Η μέθοδος αυτή μπορεί να βοηθήσει στη γρηγορότερη υλοποίηση συστημάτων που συλλέγουν ειδήσεις από διάφορες διαδικτυακές πηγές. Παράλληλα, παρουσιάζονται και κάποια πειραματικά αποτελέσματα σχετικά με τη συγκεκριμένη μέθοδο.
description: This master thesis is related to techniques and methods for the development of news aggregation sites. Research topics concerning news aggregation sites and intelligent (automatic) search of content on the web are analyzed.Moreover research topics concerning web crawling and text mining are discussed. In addition, research topics for social news aggregator sites and social media systems are analyzed. Furthermore, a method which can be used in the creation and the development of a news aggregator site is presented. This method includes the use of programs for web crawling and indexing of documents. Other programs of this method are used for searching of information in documents.In addition, this method can help to create faster systems which collect news from different web sources. Some experiments and results of this method are presented.
Νόρμες για τις δοκιμασίες εκτίμησης της λεκτικής εργαζόμενης μνήμης με το έργο αναπαραγωγής καταλόγων λέξεων και ψευδολέξεων:
Creators: name: Παρασκευαΐδης, Νίκος Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Ελληνικές νόρμες
Λεκτική εργαζόμενη μνήμη
Αναπαραγωγή καταλόγων λέξεων/ψευδολέξεων
Greek norms
Verbal working memory
Word/nonword list recall

description: Η μνήμη είναι ένα πολυπαραγοντικό σύστημα που απαρτίζεται από ένα σύνολο επιμέρους διεργασιών και αποτέλεσε για πολλές δεκαετίες αντικείμενο μελέτης και ανάπτυξης θεωρητικών μοντέλων. Το μοντέλο για την εργαζόμενη μνήμη που διατύπωσαν οι Baddeley και Hitch (1974) και σύμφωνα με το οποίο η άμεση μνήμη είναι ένα μνημονικό σύστημα που συμμετέχει σε πολλές γνωστικές λειτουργίες, έστρεψε το ενδιαφέρον πολλών ερευνητών στη μελέτη της λειτουργίας της εργαζόμενης μνήμης. Στην παρούσα έρευνα έγινε προσπάθεια στάθμισης δύο δοκιμασιών της λεκτικής εργαζόμενης μνήμης, μιας δοκιμασίας με το έργο της ανάκλησης καταλόγων λέξεων και μιας δοκιμασίας με το έργο της ανάκλησης καταλόγων ψευδολέξεων, σε ελληνικό πληθυσμό (194 συμμετέχοντες) με σκοπό οι συγκεκριμένες δοκιμασίες να αποτελέσουν εργαλεία για την εκτίμηση της λεκτικής εργαζόμενης μνήμης, τόσο στην ερευνητική όσο και στην κλινική πράξη. Παράλληλα έγινε προσπάθεια για τη διερεύνηση της σχέσης των δοκιμασιών της λεκτικής εργαζόμενης μνήμης με μια δοκιμασία μη-λεκτικής νοημοσύνης και όπως φάνηκε υπάρχει ισχυρότερη σχέση μεταξύ της δοκιμασίας ανάκλησης των καταλόγων ψευδολέξεων με τη δοκιμασία της μη-λεκτικής νοημοσύνης.
description: Memory is a multi-component system that consists of a set of specific functions. For many decades, memory has been in the main interest of researchers and the base for the development of many theoretical models. Baddeley’s and Hitch’s model of working memory, according to which the immediate memory is a system that is involved in a lot of cognitive functions, turned many researchers’ attention to the study of working memory. The present study is an attempt to product normative data of two tests of verbal working memory, one test with the task of the recall of a list of words and the other one with the task of the recall of a list of non-words, in Greek population (194 participants).The aim of the study is that these tests will be used as a tool for the evaluation of verbal working memory, both in research and in clinical practice. Simultaneously, it has been an attempt for correlation between the particular tests of working memory and a test of non-verbal intelligence. The results have shown that there is stronger correlation between the test of the recall of a list of non-words and non-verbal intelligence test.
Nonthermal electron and ion acceleration by magnetic reconnection in large laser-driven plasmas
Creators: name: Totorica, Samuel
name: Hoshino, Masahiro
name: Abel, Tom
name: Fiuza, Frederico
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Magnetic reconnection is a fundamental plasma process that is thought to play a key role in the production of nonthermal particles associated with explosive phenomena in space physics and astrophysics. Experiments at high-energy-density facilities are starting to probe the microphysics of reconnection at high Lundquist numbers and large system sizes. We have performed particle-in-cell (PIC) simulations to explore particle acceleration for parameters relevant to laser-driven reconnection experiments. We study particle acceleration in large system sizes that may be produced soon with the most energetic laser drivers available, such as at the National Ignition Facility. In these conditions, we show the possibility of reaching the multi-plasmoid regime, where plasmoid acceleration becomes dominant. Our results show the transition from \textit{X} point to plasmoid-dominated acceleration associated with the merging and contraction of plasmoids that further extend the maximum energy of the power-law tail of the particle distribution for electrons. We also find for the first time a system-size-dependent emergence of nonthermal ion acceleration in driven reconnection, where the magnetization of ions at sufficiently large sizes allows them to be contained by the magnetic field and energized by direct \textit{X} point acceleration. For feasible experimental conditions, electrons and ions can attain energies of $ε_{max,e} / k_{B} T_{e} > 100$ and $ε_{max,i} / k_{B} T_{i} > 1000$. Using PIC simulations with binary Monte Carlo Coulomb collisions we study the impact of collisionality on plasmoid formation and particle acceleration. The implications of these results for understanding the role reconnection plays in accelerating particles in space physics and astrophysics are discussed.
Erinnerungsblätter Kurt Meyer 1889 -1914
Creators: name: Meyer, Kurt
Publisher: name: Zenodo
Year: 2019
Subjects: world war 1, daily life of German adolescent (officer family), soldier of Hannover regiment FR 73 - famous by Ernst Juenger "In Stahlgewittern", letters.

description: Letters of a German soldier (died in action as a second lieutenant of Hannover regiment, famous by Ernst Juenger), to his parents - father officer, too. From last year at school to his end. Details of typical daily life, but also of personal tragedy. Old photographs, explanations.
Quasiperiodic circuit quantum electrodynamics
Creators: name: Herrig, Tobias
name: Pixley, Jedediah H.
name: König, Elio J.
name: Riwar, Roman-Pascal
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Superconducting circuits are an extremely versatile platform to realize quantum information hardware and to emulate topological materials. We here show how a simple arrangement of capacitors and conventional superconductor-insulator-superconductor junctions can realize an even broader class of systems, in the form of a nonlinear capacitive element which is quasiperiodic with respect to the quantized Cooper-pair charge. Our setup allows to create protected Dirac points defined in the transport degrees of freedom, whose presence leads to a suppression of the classical finite-frequency current noise. Furthermore, the quasiperiodicity can emulate Anderson localization in charge space, measurable via vanishing charge quantum fluctuations. The realization by means of the macroscopic transport degrees of freedom allows for a straightforward generalization to arbitrary dimensions and implements truly non-interacting versions of the considered models. As an outlook, we discuss potential ideas to simulate a transport version of the magic-angle effect known from twisted bilayer graphene.
description: 18 pages, 8 figures
Edge Intelligence for Wildlife Conservation: Real-Time Hornbill Call Classification Using TinyML
Creators: name: Hing, Kong Ka
name: Behjati, Mehran
Publisher: name: arXiv
Year: 2025
Subjects: subject: Sound (cs.SD)
subject: Machine Learning (cs.LG)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Hornbills, an iconic species of Malaysia's biodiversity, face threats from habi-tat loss, poaching, and environmental changes, necessitating accurate and real-time population monitoring that is traditionally challenging and re-source intensive. The emergence of Tiny Machine Learning (TinyML) offers a chance to transform wildlife monitoring by enabling efficient, real-time da-ta analysis directly on edge devices. Addressing the challenge of wildlife conservation, this research paper explores the pivotal role of machine learn-ing, specifically TinyML, in the classification and monitoring of hornbill calls in Malaysia. Leveraging audio data from the Xeno-canto database, the study aims to develop a speech recognition system capable of identifying and classifying hornbill vocalizations. The proposed methodology involves pre-processing the audio data, extracting features using Mel-Frequency Energy (MFE), and deploying the model on an Arduino Nano 33 BLE, which is adept at edge computing. The research encompasses foundational work, in-cluding a comprehensive introduction, literature review, and methodology. The model is trained using Edge Impulse and validated through real-world tests, achieving high accuracy in hornbill species identification. The project underscores the potential of TinyML for environmental monitoring and its broader application in ecological conservation efforts, contributing to both the field of TinyML and wildlife conservation.
description: This is a preprint version of a paper accepted and published in Springer Lecture Notes in Networks and Systems. The final version is available at https://doi.org/10.1007/978-981-96-3949-6_40
Bosonization approach to charge and spin dynamics of 1D fermions with band-curvature
Creators: name: Teber, Sofian
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider one-dimensional (1D) spin-1/2 fermions in a clean quantum wire, with forward scattering interactions and a non-linear single-particle spectrum, $ξ_k = v|k| + k^2/2m$ where $v$ is the Fermi velocity and $1/m$ is the band-curvature. We calculate the dynamical structure factor (DSF) of the model at small wave-vector $q$ with the help of the bosonization technique. For spinless fermions, we show that, starting from the single-parametric spectrum: $\om = u |q|$, bosonization emulates the 2-parametric excitation spectrum: $\om = u |q| \pm q^2/2m^*$, where $m^*$ decreases with increasing repulsive interactions. Moreover, away from the excitation-cone, {\it i.e.} $\om \gg u |q|$, bosonization yields the 2-pair excitation continuum of the DSF. For spinful fermions, we show that the spin-charge coupling (SCC) due to band-curvature affects charge and spin DSF in an asymmetric way. For the charge DSF, SCC manifests as a two-peak structure: a charge peak at $\om = u_ρ|q|$ but also a spin peak at $\om = u_σ|q|$, as charge fluctuations may decay via chargeless spin-singlet excitations. For the magnetic DSF, SCC manifests as a continuous transfer of magnetic spectral weight to frequencies $\om > u_σ|q|$, as spin fluctuations decay via pairs of chargeless spin and spinless charge-neutral excitations.
description: 23 pages, 14 figures, revtex 4 (v2) several changes per referee's comments. Only Appendix A will appear in the published version (PRB)
Monitoring the refractive index of tissue models using light scattering spectroscopy
Creators: name: Bailey, Michelle
name: Gardner, Benjamin
name: Alunni-Cardinali, Martina
name: Caponi, Silvia
name: Fioretto, Daniele
name: Stone, Nick
name: Palombo, Francesca
Publisher: name: arXiv
Year: 2020
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: In this work, we report the application of Raman microspectroscopy for analysis of the refractive index of a range of tissue phantoms. Using both a custom-developed setup with visible laser source and a commercial micro-spectrometer with near infrared laser, we measured the Raman spectra of gelatin hydrogels at various concentrations. By building a calibration curve from measured refractometry data and Raman scattering intensity for different vibrational modes of the hydrogel, we determined the refractive indices of the gels from their Raman spectra, with approximately the same accuracy as that of refractometry measurements with an Abbe refractometer. This work highlights the importance of a correlative approach through Brillouin-Raman microspectroscopy for the mechano-chemical analysis of biologically relevant samples.
description: 11 pages, 5 figures, 1 table
High Cadence Optical Transient Searches using Drift Scan Imaging II: Event Rate Upper Limits on Optical Transients of Duration <21 ms and Magnitude <6.6
Creators: name: Tingay, S. J.
name: Joubert, W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We have realised a simple prototype system to perform searches for short timescale optical transients, utilising the novel drift scan imaging technique described by Tingay (2020). We used two coordinated and aligned cameras, with an overlap field-of-view of approximately 3.7 sq. deg., to capture over 34000 X 5 second images during approximately 24 hours of observing. The system is sensitive to optical transients, due to an effective exposure time per pixel of 21 ms, brighter than a V magnitude of 6.6. In our 89.7 sq. deg. hr of observations we find no candidate astronomical transients, giving an upper limit to the rate of these transients of 0.8 per square degree per day, competitive with other experiments of this type. The system is triggered by reflections from satellites and various instrumental effects, which are easily identifiable due to the two camera system. The next step in the development of this promising technique is to move to a system with larger apertures and wider fields of view.
description: Eight pages, five figures, one table
Discovery of Rapid Hard X-ray Variability and New Jet Activity in the Symbiotic Binary R Aqr
Creators: name: Nichols, J. S.
name: DePasquale, J.
name: Kellogg, E.
name: Anderson, C. S.
name: Sokoloski, J.
name: Pedelty, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Two Chandra observations of the R Aqr symbiotic binary system taken 3.3 years apart show dramatic changes in the X-ray morphology and spectral characteristics in the inner 500 AU of this system. The morphology of the soft X-ray emission has evolved from a nearly circular region centered on the binary system to an hourglass shape that indicates the formation of a new southwest jet. Synchrotron radiation from the new jet in contemporaneous VLA radio spectra implies the physical conditions in the early stages of jet development are different from those in the more extended outer thermal jets known to exist for decades in this system. The central binary source has two X-ray spectral components in each of the two epochs, a soft component and a highly absorbed hard component characterized by T ~ 10^8 K if fit with a thermal plasma model. The spectrum hardened considerably between 2000.7 and 2004.0, primarily due to increased flux above 5 keV, suggesting a change in the accretion activity of the white dwarf on a timescale of a few years or less. Point-source Fe K emission is detected at the position of the central binary system in both observations. While the earlier observation shows evidence of only a single emission peak near Fe K alpha at 6.4 keV, the later observation shows a more complex emission structure between 6 and 7 keV. Finally, we have discovered a modulation in the hard X-ray flux with a period of 1734 s at a 95% confidence level in the 2004 observation only. The modulation potentially arises from standing shocks in an accretion column and we have explored the possibility that the white dwarf in R Aqr is analogous to the magnetic white dwarfs in Intermediate Polar.
description: 31 pages, 14 figures, 1 table To be published in ApJ, expected April 10 issue. AAS LaTex style
MiR-205-5p and miR-342-3p cooperate in the repression of the E2F1 transcription factor in the context of anticancer chemotherapy resistance
Creators: name: Lai, Xin
name: Eberhardt, Martin
name: Gupta, Shailendra K
name: Schmitz, Ulf
name: Marquardt, Stephan
name: Knoll, Susanne
name: Spitschak, Alf
name: Wolkenhauer, Olaf
name: Pützer, Brigitte M
name: Vera, Julio
Publisher: name: F1000 Research Limited
Year: 2019

description: We integrated bioinformatics, structural and kinetic modelling, and experiments to study cooperative regulation of E2F1 by microRNAs in the context of chemoresistance.
Superbroadcasting of conjugate quantum variables
Creators: name: D'Ariano, Giacomo M.
name: Perinotti, Paolo
name: Sacchi, Massimiliano F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the problem of broadcasting arbitrary states of radiation modes from N to M>N copies by a map that preserves the average value of the field and optimally reduces the total noise in conjugate variables. For N>=2 the broadcasting can be achieved perfectly, and for sufficiently noisy input states one can even purify the state while broadcasting--the so-called superbroadcasting. For purification (i.e. M<=N), the reduction of noise is independent of M. Similar results are proved for broadcasting with phase-conjugation. All the optimal maps can be implemented by linear optics and linear amplification.
description: 7 pages, 1 eps figures. Accepted for publication on Europhysics Letters
Powerful but integrationist : German behaviour regarding European integration
Creators: name: Abedi-Djourabtchi, Amir-Hassan
Publisher: name: University of British Columbia
Year: 2009

description: This thesis analyzes Germany's policy towards European integration by examining both its motivations for participating in the process of European integration and its limits of acceptance of further integration. It concentrates on the early 1950s and on the years following the end of the partition of Germany — two critical junctures when the Federal Republic of Germany has had to make decisions of general principle about its future role in Europe. Germany is of special interest because it is a rather distinctive case: very pro-integrationist despite being large and increasingly powerful. Support for European unification has been a fundamental assumption of German political behaviour from the earliest days of the Federal Republic. In the period 1949-1957, however, Germany's position towards European integration was more fluid. Germany's main motivations for participating in the process of European integration were initially moral rehabilitation and the regaining of sovereignty. Another important motivation has been the creation of internal and external stability. Regional integration has been regarded as the most appropriate strategy for achieving these aims. Yet there are certain areas where Bonn has been less willing to make compromises. Since the 1950s one of Germany's foremost limits of acceptance of integration has been to not foreclose the possibility of German reunification. Since 1990, when reunification was finally achieved. Germany's limits of acceptance are centred on three principles: free trade, monetary stability, and subsidiarity/federalism. These principles have been essential for the successful political and economic development of the Federal Republic. Germany, therefore, wants to see them firmly established in the European Union.The Federal Republic's distinctiveness can be explained by its historical experience. West Germany's political and economic structure was created in the early 1950s. These formative years also saw the Federal Republic's integration into the West and participation in the process of European unification. West Germany's successful economic and political development was therefore seen as being a result of these two interconnected processes. Germany's disastrous prewar history combined with more than forty successful years in an interlocking network of international institutions has minimized the importance of classic state-sovereignty for the Federal Republic.
On the Origin and Thermal Stability of Arrokoths and Plutos Ices
Creators: name: Lisse, C. M.
name: Young, L. A.
name: Cruikshank, D. P.
name: Sandford, S. A.
name: Schmitt, B.
name: Stern, S. A.
name: Weaver, H. A.
name: Umurhan, O.
name: Pendleton, Y. J.
name: Keane, J. T.
name: Gladstone, G. R.
name: Parker, J. M.
name: Binzel, R. P.
name: Earle, A. M.
name: Horanyi, M.
name: El-Maarry, M.
name: Cheng, A. F.
name: Moore, J. M.
name: McKinnon, W. B.
name: Grundy, W. M.
name: Kavelaars, J. J.
name: Linscott, I. R.
name: Lyra, W.
name: Lewis, B. L.
name: Britt, D. T.
name: Spencer, J. R.
name: Olkin, C. B.
name: McNutt, R. L.
name: Elliott, H. A.
name: Dello-Russo, N.
name: Steckloff, J. K.
name: Neveu, M.
name: Mousis, O.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We discuss in a thermodynamic, geologically empirical way the long-term nature of the stable majority ices that could be present in Kuiper Belt Object 2014 MU69 after its 4.6 Gyr residence in the EKB as a cold classical object. Considering the stability versus sublimation into vacuum for the suite of ices commonly found on comets, Centaurs, and KBOs at the average ~40K sunlit surface temperature of MU69 over Myr to Gyr, we find only 3 common ices that are truly refractory: HCN, CH3OH, and H2O (in order of increasing stability). NH3 and H2CO ices are marginally stable and may be removed by any positive temperature excursions in the EKB, as produced every 1e8 - 1e9 yrs by nearby supernovae and passing O/B stars. To date the NH team has reported the presence of abundant CH3OH and evidence for H2O on MU69s surface (Lisse et al. 2017, Grundy et al. 2020). NH3 has been searched for, but not found. We predict that future absorption feature detections will be due to an HCN or poly-H2CO based species. Consideration of the conditions present in the EKB region during the formation era of MU69 lead us to infer that it formed "in the dark", in an optically thick mid-plane, unable to see the nascent, variable, highly luminous Young Stellar Object-TTauri Sun, and that KBOs contain HCN and CH3OH ice phases in addition to the H2O ice phases found in their Short Period comet descendants. Finally, when we apply our ice thermal stability analysis to bodies/populations related to MU69, we find that methanol ice may be ubiquitous in the outer solar system; that if Pluto is not a fully differentiated body, then it must have gained its hypervolatile ices from proto-planetary disk sources in the first few Myr of the solar systems existence; and that hypervolatile rich, highly primordial comet C/2016 R2 was placed onto an Oort Cloud orbit on a similar timescale.
description: 34 Pages, 5 Figures, 2 SOM Tables
k-core percolation on interdependent and interconnected multiplex networks
Creators: name: Zheng, Kexian
name: Liu, Ying
name: Wang, Yang
name: Wang, Wei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Many real-world networks are coupled together to maintain their normal functions. Here we study the robustness of multiplex networks with interdependent and interconnected links under k-core percolation, where a node fails when it connects to a threshold of less than k neighbors. By deriving the self-consistency equations, we solve the key quantities of interests such as the critical threshold and size of the giant component analytically and validate the theoretical results with numerical simulations. We find a rich phase transition phenomenon as we tune the inter-layer coupling strength. Specifically speaking, in the ER-ER multiplex networks, with the increase of coupling strength, the size of the giant component in each layer first undergoes a first-order transition and then a second-order transition and finally a first-order transition. This is due to the nature of inter-layer links with both connectivity and dependency simultaneously. The system is more robust if the dependency on the initial robust network is strong and more vulnerable if the dependency on the initial attacked network is strong. These effects are even amplified in the cascading process. When applying our model to the SF-SF multiplex networks, the type of transition changes. The system undergoes a first-order phase transition first only when the two layers' mutually coupling is very strong and a second-order transition in other conditions.
description: 8 pages,7 figures
Candidates for dark matter in the ${SU}(3)_C {SU}(3)_L {U}(1)_N$ models
Creators: name: long, H. N.
name: Lan, N. Q.
name: Soa, D. V.
name: Thuc, L. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It has recently been pointed out that the 511 keV emission line detected by INTEGRAL/SPI from the bulge of our galaxy could be explained by annihilations of light dark matter particles into $e^+ e^-$. We present the possibility that dark matter could be made of scalar candidates, namely, of the Higgs bosons in the models based on ${SU}(3)_C\otimes {SU}(3)_L \otimes {U}(1)_N$ (3-3-1) gauge group. These particles are singlet of the ${SU}(2)_L \otimes {U}(1)_Y$ group, so they do not interact with the ordinary particles, exept the Higgs boson in the standard model. The Spergel-Steinhardt condition for self-interacting dark matter gives a bound on the mass of the candidates to be a few MeVs. Besides the scalar candidates, which exist in both non-SUSY and SUSY 3-3-1 models with right-handed neutrinos, the spin $\fr 1 2$ candidate exists in a variant 3-3-1 version with exotic neutral lepton. In contrast to the singlet models, where an extra symmetry must be imposed to account the stability of the dark matter, here the decay of the candidates is automatically forbidden in all orders of perturbative expansion. This is because of the following feature: these scalars are singlets, i.e., in bottom of the Higgs triplet. Therefore, the standard model fermions and the standard gauge bosons cannot couple with them.
description: 22 pages
XAVFSIZ TURIZMNI TA'MINLASH TUSHUNCHASI TASNIFI VA MOHIYATI
Creators: name: Gulyamov Kaxramon Davronovich,  O'zbekiston Respublikasi IIV Samarqand viloyati  IIB Xavfsiz turizmni ta'minlash boshqarmasi xodimi
Publisher: name: Zenodo
Year: 2024

description: Mazkur maqolada xavfsiz turizmni ta’minlash tushunchasining mohiyati va uning o‘ziga xos xususiyatlari tahlil qilinadi. Xavfsiz turizmni tashkil etishda davlat organlarining roli, huquqiy va tashkiliy mexanizmlar hamda xavfsizlikni ta’minlashning muhim yo‘nalishlari o‘rganiladi. Shuningdek, turizm faoliyatida xavfsizlik standartlari va ularning milliy hamda xalqaro qoidalar bilan bog‘liq jihatlari muhokama qilinadi.

Kalit so‘zlar: xavfsiz turizm, xavfsizlik standartlari, davlat organlari, huquqiy mexanizmlar, tashkiliy mexanizmlar
Time variation of radial gradients in the galactic disk: electron temperatures and abundances
Creators: name: Maciel, W. J.
name: Quireza, C.
name: Costa, R. D. D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the electron temperature gradient in the galactic disk as measured by young HII regions on the basis of radio recombination lines and the corresponding gradient in planetary nebulae (PN) based on [OIII] electron temperatures. The main goal is to investigate the time evolution of the electron temperature gradient and of the radial abundance gradient, which is essentially a mirror image of the temperature gradient. The recently derived electron temperature gradient from radio recombination lines in HII regions is compared with a new determination of the corresponding gradient from planetary nebulae for which the progenitor star ages have been determined. The newly derived electron temperature gradient for PN with progenitor stars with ages in the 4-5 Gyr range is much steeper than the corresponding gradient for HII regions. These electron temperature gradients are converted into O/H gradients in order to make comparisons with previous estimates of the flattening rate of the abundance gradient. It is concluded that the O/H gradient has flattened out in the past 5 Gyr at a rate of about 0.0094 dex kpc-1 Gyr-1, in good agreement with our previous estimates.
description: 4 pages, 3 figures, accepted for publication in Astronomy and Astrophysics Letters. Uses files aa.cls and natbib.sty
Deep reinforcement learning for irrigation scheduling using high-dimensional sensor feedback
Creators: name: Saikai, Yuji
name: Peake, Allan
name: Chenu, Karine
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Deep reinforcement learning has considerable potential to improve irrigation scheduling in many cropping systems by applying adaptive amounts of water based on various measurements over time. The goal is to discover an intelligent decision rule that processes information available to growers and prescribes sensible irrigation amounts for the time steps considered. Due to the technical novelty, however, the research on the technique remains sparse and impractical. To accelerate the progress, the paper proposes a principled framework and actionable procedure that allow researchers to formulate their own optimisation problems and implement solution algorithms based on deep reinforcement learning. The effectiveness of the framework was demonstrated using a case study of irrigated wheat grown in a productive region of Australia where profits were maximised. Specifically, the decision rule takes nine state variable inputs: crop phenological stage, leaf area index, extractable soil water for each of the five top layers, cumulative rainfall and cumulative irrigation. It returns a probabilistic prescription over five candidate irrigation amounts (0, 10, 20, 30 and 40 mm) every day. The production system was simulated at Goondiwindi using the APSIM-Wheat crop model. After training in the learning environment using 1981-2010 weather data, the learned decision rule was tested individually for each year of 2011-2020. The results were compared against the benchmark profits obtained by a conventional rule common in the region. The discovered decision rule prescribed daily irrigation amounts that uniformly improved on the conventional rule for all the testing years, and the largest improvement reached 17% in 2018. The framework is general and applicable to a wide range of cropping systems with realistic optimisation problems.