cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ενίσχυση των ικανοτήτων, των δεξιοτήτων και των γνώσεων των παιδιών που βρίσκονται στο αυτιστικό φάσμα μέσα από την χρήση εκπαιδευτικών λογισμικών στο νηπιαγωγείο
Creators: name: Κολοβού, Γεωργία Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Αυτισμός
Εκπαιδευτικά λογισμικά
Παιδική ηλικία
Autism
Educational software
Childhood

description: Στην παρούσα εργασία γίνεται γνωριμία με τον αυτισμό και έπειτα με τις ειδικές μαθησιακές ανάγκες των παιδιών που φέρουν τα αντίστοιχα διάχυτα αναπτυξιακά χαρακτηριστικά. Στην συνέχεια, περιγράφονται τα εκπαιδευτικά λογισμικά, ελληνικά και διεθνή, καθώς επίσης και τα διαφοροποιημένα μέσα και υλικά που μπορούν να χρησιμοποιηθούν για να βοηθήσουν στην αναπτυξιακή πορεία των παιδιών με αυτισμό στα πλαίσια του νηπιαγωγείου. Ο σκοπός της παρούσας ερευνητικής εργασίας είναι η ανάπτυξη των δεξιοτήτων, των ικανοτήτων και των γνώσεων των παιδιών με αυτισμό μέσα από την σωστή βοήθεια και καθοδήγηση στο παιδί και μέσω δύο εκπαιδευτικών λογισμικών το «Μαγικό φίλτρο» και το «ΕκτοΝούς» που θα χρησιμοποιηθούν στο χώρο του νηπιαγωγείου. Το ερευνητικό πρόβλημα εστιάζεται στη μελέτη τριών διαφορετικών περιπτώσεων μέσα από την συλλογή δεδομένων, με απώτερο στόχο την καλύτερη δυνατή εκπαιδευτική και κοινωνική ένταξη των εν λόγω παιδιών.
description: In the present work we get acquainted with autism and then with the special learning needs of children who have the corresponding diffuse developmental characteristics. Next, the educational software, Greek and international, is described, as well as the differentiated means and materials that can be used to help the developmental course of children with autism in kindergarten. The purpose of this research is to develop the skills, abilities and knowledge of children with autism through the right help and guidance to the child and through two educational software "Magic Filter" and "ΕktoNous" that will be used in the field. of kindergarten. The research problem focuses on the study of three different cases through data collection, with the ultimate goal of the best possible educational and social integration of these children.
Tropical varieties for non-archimedean analytic spaces
Creators: name: Gubler, Walter
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14G40 (primary), 11G10, 14G22 (secondary)

description: We associate to an analytic subvariety of a torus a tropical variety. In the first part, we generalize the results from tropical algebraic geometry to this non-archimedean analytic situation. The periodic case is applied to a totally degenerate abelian variety A. We obtain a dimensionality bound for the range of an algebraic morphism from a smooth variety Y to A in terms of the singularities of a strictly semistable model of Y. The main result is that Chambert-Loir's canonical measures on a closed subvariety of A induce piecewise Haar measures on the associated tropical variety and we give an explicit description of these measures in terms of tropical geometry. In a subsequent paper, this is the key step in the proof of Bogomolov's conjecture for totally degenerate abelian varieties over function fields.
description: 46 pages; submitted. Improved formulations, minor errors corrected, Example 9.8 added
Modeling the Ga/As binary system across temperaturesand compositions from first principles
Creators: name: imbalzano, Giulio
name: Ceriotti, Michele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Materials composed of elements from the third and fifth columns of the periodic table display a very rich behavior, with the phase diagram usually containing a metallic liquid phase and a polar semiconducting solid. As a consequence, it is very hard to achieve transferable empirical models of interactions between the atoms that can reliably predict their behavior across the temperature and composition range that is relevant to the study of the synthesis and properties of III/V nanostructures and devices. We present a machine-learning potential trained on density functional theory reference data that provides a general-purpose model for the Ga$_x$As$_{1-x}$ system. We provide a series of stringent tests that showcase the accuracy of the potential, and its applicability across the whole binary phase space, computing with ab initio accuracy a large number of finite-temperature properties as well as the location of phase boundaries. We also show how a committe model can be used to reliably determine the uncertainty induced by the limitations of the ML model on its predictions, to identify regions of phase space that are predicted with insufficient accuracy, and to iteratively refine the training set to achieve consistent, reliable modeling.
Muonium in C₆₀ fullerites : studies of structural and electronic properties
Creators: name: Duty, Timothy Lee
Publisher: name: University of British Columbia
Year: 2008

description: μSR studies of crystalline C₆₀ reveal the existence of two distinct paramagnetic states. The experiments described in this thesis confirm that one is an exohedrally bonded muonium radical, while the other is endohedral muonium with a hyperfine parameter Aμ, close to that of muonium in vacuum. The signal from the muonium-C₆₀ radical -- which is characterized by a small Aμ, (10% of Avacμ) and an anisotropic hyperfine interaction -- is sensitive to the molecular dynamics and is used to study the structural phase transition of solid C₆₀ near 260K. Only endohedral muonium is observed in the alkali-metal-doped fullerites K₄C₆₀, K₆C₆₀, and Rb₆C₆₀. From its coherent spin precession, we find all three to be semiconductors with small gaps on the order of 0.5 eV. Our results conflict with the simple band structure model of doped fullerites indicating that electron-electron correlation effects may be important in determining the electronic structure of these solids.
Evolutionary Reformulation of Quantum Gravity
Creators: name: Montani, Giovanni
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a critical analysis of the Canonical approach to quantum gravity, which relies on the ambiguity of implementing a space-time slicing on the quantum level. We emphasize that such a splitting procedure is consistent only if a real matter fluid is involved in the dynamics.
description: 5 pages, proceedings of the XI Marcel Grossmann meeting on Relativistic Astrophysics, July 23-29, 2006, Berlin, minor changes added
Electrical stimulation of reward sites in the ventral tegmental area of the rat increases dopamine transmission in the nucleus accumbens as measured by in vivo microdialysis
Creators: name: Fiorino, Dennis Frank
Publisher: name: University of British Columbia
Year: 2008

description: In vivo microdialysis with HPLC-ED was used to measure dopamine (DA),3,4-dihydroxyphenylacetic acid (DOPAC), homovanillic acid (HVA) and 5-hydroxyindoleacetic acid (5-HIAA) in the nucleus accumbens of the rat, prior to, during, and after 15-min periods of electrical brain-stimulation at sites in the ventral tegmental area (VTA) that supported intracranial self-stimulation (ICSS). In the first experiment, both ICSS and yoked-stimulation of the VTA evoked significant increases in extracellular concentrations of DA, its metabolites, and 5-HIAA.Comparable results from ICSS and yoked groups were interpreted as evidence that the rewarding properties of VTA stimulation were a causal factor in the elevated DA transmission in the nucleus accumbens, rather than intense operant behavior. Further evidence for this hypothesis came from a second set of data in which changes in extracellular DA levels during the measurement of rate/intensity functions for ICSS were positively correlated. 5-HIAA concentrations also increased during ICSS but these changes were not correlated with either ICSS rate or current intensity, suggesting that changes in serotonin metabolism were unlikely to subserve brain-stimulation reward in the VTA. These results provide further evidence that stimulated mesolimbic DA release is a sufficient condition for reward.
Ο Αρχιμανδρίτης Απόστολος Φαφούτης (1874 – 1960) και η εποχή του
Creators: name: Αρκουμάνη, Κωνσταντίνα Αντωνίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Αρχιμανδρίτης Απόστολος Φαφούτης
Άγιος Χριστόφορος
Αγρίνιο
Archimandrite Apostolos Fafoutis
Agios Christoforos
Agrinio

description: Η παρούσα διπλωματική εργασία είναι μια μικρή συνεισφορά στη σπουδαιότερη εκκλησιαστική προσωπικότητα των τελευταίων ετών στην Αιτωλοακαρνανία, τον Αρχιμανδρίτης Απόστολο Φαφούτη, επίσης γνωστό ως Παπαποστόλη. Ο π. Απόστολος ήταν ένας πανέξυπνος κληρικός που ενέπνεε σεβασμό και αποτελούσε παρουσία ευθύνης χωρίς το παραμικρό ίχνος φανατισμού και κομματικής εξάρτησης. Βοήθησε φτωχούς, πρόσφυγες και φυλακισμένους, αλλά είχε την ευκαιρία να συνδεθεί και με ανθρώπους που κατείχαν αξιώματα και διακεκριμένες θέσεις στη κοινωνία. Ο Αρχιμανδρίτης Απόστολος Φαφούτης είχε ως πρότυπό του τον Άγιο Χριστόφορο, Πολιούχο του Αγρινίου. Zητούσε επίμονα την αρωγή των αγαπημένων του ενοριτών, μαθητών, προσκόπων και απλών ανθρώπων για την ανέγερση του νέου ναού του Αγίου Χριστοφόρου. Επίσης, συμμετείχε μαζί τους στην αναδάσωση του άλσους της περιοχής του Αγίου Χριστοφόρου. Κατά τη διάρκεια του Β’ Παγκοσμίου πολέμου και Εμφυλίου, ο π. Απόστολος σαν ένας αληθινός ποιμένας, παρέμεινε κοντά στο ποίμνιο, ενώ υπενθυμίζει στους συμπατριώτες του ότι ως Ορθόδοξοι είναι ανάγκη να μείνουν μέσα στην Εκκλησία ενωμένοι, χωρίς φανατισμό και η δυνατή του πίστη παρακινεί τους ανθρώπους ότι θα ξεπεραστούν οι δυσκολίες της εποχής.
description: The present diplomatic work is a small contribution to the greatest ecclesiastical personality of the past decades in Aitoloakarnania, Archimandrite Apostolos Fafoutis, also known as Papapostolis. Father Apostolos was a brilliant priest who inspired respect and comprised features of responsibility without any sign of fanaticism and partisan dependency. He helped poor people, refugees and prisoners, but at the same time he also had the chance to connect with people of authority, as well as prominent figures of the local society. Archimandrite Apostolos Fafoutis had Agios Christoforos, the patron saint of Agrinio, as a role model. He persistently seeked for assistance on behalf of his beloved parishioners, pupils, scouts and inhabitants of Agrinio in order to be able to reconstruct the new church of Agios Christoforos. He also joined his flock in reforesting the grove in the area of Agios Christoforos. During both the Second World War and the Civil War, Father Apostolos, like a real pastor, continued to be close to his flock while still reminding everyone that as Orthodox people we need to stay united in the Church without any bigotry, and also via his powerful faith encouraging people that the difficulties of the era will be overcome.
Acoustic Su-Schrieffer-Heeger lattice: Direct mapping of acoustic waveguides to Su-Schrieffer-Heeger model
Creators: name: Coutant, Antonin
name: Sivadon, Audrey
name: Zheng, Liyang
name: Achilleos, Vassos
name: Richoux, Olivier
name: Theocharis, Georgios
name: Pagneux, Vincent
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Topological physics strongly relies on prototypical lattice model with particular symmetries. We report here on a theoretical and experimental work on acoustic waveguides that is directly mapped to the one-dimensional Su-Schrieffer-Heeger chiral model. Starting from the continuous two dimensional wave equation we use a combination of monomadal approximation and the condition of equal length tube segments to arrive at the wanted discrete equations. It is shown that open or closed boundary conditions topological leads automatically to the existence of edge modes. We illustrate by graphical construction how the edge modes appear naturally owing to a quarter-wavelength condition and the conservation of flux. Furthermore, the transparent chirality of our system, which is ensured by the geometrical constraints allows us to study chiral disorder numerically and experimentally. Our experimental results in the audible regime demonstrate the predicted robustness of the topological edge modes.
description: 10 pages, 11 figures. Slight modification of title, minor additions to the text
Bridging Repositories, ELNs and Semantic Data Management: A LinkAhead-based use case for 3D Additive Manufacturing
Creators: name: Schlemmer, Alexander
name: Spreckelsen, Florian
name: Tristram, Frank
name: tom Wörden, Henrik
Publisher: name: Zenodo
Year: 2025

description: This poster was shown as part of the demo of the deRSE25:

https://events.hifis.net/event/1741/contributions/13308/
Turbulence characteristics of the Bödewadt layer in a large shrouded rotor-stator system
Creators: name: Poncet, Sébastien
name: Randriamampianina, Anthony
Publisher: name: arXiv
Year: 2006
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: A three-dimensional direct numerical simulation (3D DNS) is performed to describe the turbulent flow in an enclosed rotor-stator cavity characterized by a large aspect ratio $G=(b-a)/h=18.32$ and a small radius ratio $a/b=0.15$ ($a$ and $b$ the inner and outer radii of the rotating disk and $h$ the interdisk spacing). Recent comparisons with velocity measurements have shown that, for the rotational Reynolds number $Re=Ωb^2/ν=95000$ ($Ω$ the rate of rotation of the rotating disk and $ν$ the kinematic viscosity of water) under consideration, the stator boundary layer is 3D turbulent and the rotor one is still laminar. Budgets for the turbulence kinetic energy are here presented and highlight some characteristic features of the effect of rotation on turbulence. A quadrant analysis of conditionally averaged velocities is also performed to identify the contributions of different events (ejections and sweeps) on the Reynolds shear stress.
description: 4 pages
ДРАМАТИЧЕСКИЙ ТИП И ЕГО СПЕЦИФИЧЕСКИЕ ЖАНРЫ
Creators: name: Исомиддинова, Эъзоза
Publisher: name: Zenodo
Year: 2024

description: В этой статье, признавая, что существует три типа классической литературы - эпос, лирика, драма, подробно рассматриваются три типа драматургии: трагедия, комедия и драма (в узком смысле) жанры.
Spiral arm triggering of star formation
Creators: name: Bonnell, Ian A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present numerical simulations of the passage of clumpy gas through a galactic spiral shock, the subsequent formation of giant molecular clouds (GMCs) and the triggering of star formation. The spiral shock forms dense clouds while dissipating kinetic energy, producing regions that are locally gravitationally bound and collapse to form stars. In addition to triggering the star formation process, the clumpy gas passing through the shock naturally generates the observed velocity dispersion size relation of molecular clouds. In this scenario, the internal motions of GMCs need not be turbulent in nature. The coupling of the clouds' internal kinematics to their externally triggered formation removes the need for the clouds to be self-gravitating. Globally unbound molecular clouds provides a simple explanation of the low efficiency of star formation. While dense regions in the shock become bound and collapse to form stars, the majority of the gas disperses as it leaves the spiral arm.
description: 6 pages, 4 figures: IAU 237, Triggering of star formation in turbulent molecular clouds, eds B. Elmegreen and J. Palous
Multilinear Polynomials Are Surjective on Algebras With Surjective Inner Derivations
Creators: name: Vitas, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16R99, 16W25

description: Let $f(X_1,\dots, X_n)$ be a nonzero multilinear noncommutative polynomial. If $A$ is a unital algebra with a surjective inner derivation, then every element in $A$ can be written as $f(a_1,\dots,a_n)$ for some $a_i\in A$.
description: 21 pages, 0 figures, submited to Journal of Algebra
มโนทัศน์ที่คลาดเคลื่อนในการวัดและประเมินทางการศึกษา
Creators: name: ศิริชัย กาญจนวาสี
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2556
Subjects: มโนทัศน์ที่คลาดเคลื่อนการวัดและประเมิน,โมเดลการวัดและประเมิน,ทฤษฎีการวัดและประเมิน

description: 2, 9, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Adsorption of metallic ions from aqueous solution on surfactant aggregates: a molecular dynamics study
Creators: name: Chavez-Martinez, E. H.
name: Cedillo-Cruz, E.
name: Dominguez, H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Metallic ion adsorption on surfactant aggregates were studied with Molecular dynamics simulations. Using ionic salts, such as lead sulfate (PbSO$_4$) and aluminum sulfate [Al$_2$(SO$_4$)$_3$], adsorption of lead and aluminum were investigated at different salt concentrations and different surfactant aggregates (micelles) sizes. The micelles were constructed with spherical shapes composed of sodium dodecyl sulfate (SDS) anionic surfactants. The electrostatic interactions between the positive ions and the negative SDS headgroups promote capture of the metal particles on the aggregate surface. Metal adsorption was analyzed in terms of radial density profiles, partial pair distribution functions and adsorption isotherms. It is showed that SDS micelles adsorb better lead than aluminum ions regardless of the size of the aggregates and salt concentrations.
description: 9 pages, 6 figures, 1 table
UNITSIM-Galaxies: data release and clustering of emission-line galaxies
Creators: name: Knebe, Alexander
name: Lopez-Cano, Daniel
name: Avila, Santiago
name: Favole, Ginevra
name: Stevens, Adam R. H.
name: Gonzalez-Perez, Violeta
name: Reyes-Peraza, Guillermo
name: Yepes, Gustavo
name: Chuang, Chia-Hsun
name: Kitaura, Francisco-Shu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: New surveys such as ESA's Euclid mission are planned to map with unprecedented precision the large-scale structure of the Universe by measuring the 3D positions of tens of millions of galaxies. It is necessary to develop theoretically modelled galaxy catalogues to estimate the expected performance and to optimise the analysis strategy of these surveys. We populate two pairs of (1 Gpc/h)^3 volume dark-matter-only simulations from the UNIT project with galaxies using the SAGE semi-analytic model of galaxy formation, coupled to the photoionisation model get_emlines to estimate their H_alpha emission. These catalogues represent a unique suite that includes galaxy formation physics and - thanks to the fixed-pair technique used - an effective volume of ~(5 Gpc/h)^3, which is several times larger than the Euclid survey. We present the performance of these data and create five additional emission-line galaxy (ELG) catalogues by applying a dust attenuation model as well as adjusting the flux threshold as a function of redshift in order to reproduce Euclid-forecast dN/dz values. As a first application, we study the abundance and clustering of those model H_alpha ELGs: for scales greater than ~5 Mpc/h, we find a scale-independent bias with a value of $b\sim 1$ at redshift z ~ 0.5, that can increase nearly linearly to $b\sim 4$ at $z\sim 2$, depending on the ELG catalogue. Model galaxy properties, including their emission-line fluxes (with and without dust extinction) are publicly available.
description: 16 pages, revised version as accepted by MNRAS
Χρηματοοικονομικός Αλφαβητισμός και Κρυπτονομίσματα
Creators: name: Φελέκης, Νικόλαος Λαζάρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Κρυπτονομίσματα
Χρηματοοικονομικός Αλφαβητισμός
Νομισματική Ισοτιμία
Cryptocurrencies
Bitcoin
Blockchain

description: Στα πλαίσια αυτής της εργασίας, έγινε μία προσπάθεια κατανόησης και ανάλυσης Της έννοιας και της σημαντικότητας του χρηματοοικονομικού αλφαβητισμού, της έννοιας των κρυπτονομισμάτων και του αποκεντρωμένου συστήματος, των περίπλοκων λεπτομερειών σχετικά με το blockchain. Επίσης έγινε μία προσπάθεια προκειμένου να μελετηθούν τα αποτελέσματα σχετικού ερωτηματολογίου σχετικά με το επίπεδο του χρηματοοικονομικού αλφαβητισμού και οι γνώσεις του πλήθους του ερωτηματολογίου σχετικά με τα κρυπτονομίσματα, να προταθούν τρόποι αύξησης του χρηματοοικονομικού αλφαβητισμού, να μελετηθούν οι επιπτώσεις των κρυπτονομισμάτων στην αγορά των παραδοσιακών κεντρικών νομισματικών συστημάτων.
description: The purpose of this thesis is to understand and analyze the concept and importance of financial literacy, the concept of cryptocurrencies and the decentralized system and the intricate details of blockchain. Moreover we tried to study the results of a questionnaire on the level of financial literacy and the knowledge of the number of questionnaires on cryptocurrencies, the propose ways to increase financial literacy and the study the impact of cryptocurrencies on the market of traditional centralized monetary systems.
Dirac generating operators and Manin triples
Creators: name: Chen, Zhuo
name: Stienon, Mathieu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: Given a pair of (real or complex) Lie algebroid structures on a vector bundle $A$ (over $M$) and its dual $A^*$, and a line bundle $\module$ such that $\module\otimes\module=(\wedge^{\TOP} A^*\otimes\wedge^{\TOP} T^*M)$, there exist two canonically defined differential operators $\bdees$ and $\bdel$ on $\sections{\wedge A\otimes\module}$. We prove that the pair $(A,A^*)$ constitutes a Lie bialgebroid if, and only if, the square of $\bdirac =\bdees+\bdel$ is the multiplication by a function on $M$. As a consequence, we obtain that the pair $(A,A^*)$ is a Lie bialgebroid if, and only if, $\bdirac$ is a Dirac generating operator as defined by Alekseev & Xu \cite{AlekseevXu}. Our approach is to establish a list of new identities relating the Lie algebroid structures on $A$ and $A^*$ (Theorem \ref{Thm:C}).
description: 26 pages, introduction rewritten, minor corrections
ประสิทธิภาพการกรองของหน้ากากอนามัย หน้ากากผ้าและหน้ากากN95/KN95/FFP1/FFP2ที่มีใช้ในช่วงที่โควิด19ระบาดในประเทศไทย
Creators: name: พานิช อินต๊ะ
Publisher: name: กองบริหารการวิจัย
Year: 2564
Subjects: ละอองลอย
หน้ากากอนามัย
หน้ากากผ้า
อุปกรณ์ช่วยหายใจ
ประสิทธิภาพการกรอง

description: วารสารวิทยาศาสตร์และเทคโนโลยี, 29, 5, 904-918
Deformation theory of dialgebra morphisms
Creators: name: Yau, Donald
Publisher: name: arXiv
Year: 2006
Subjects: subject: Rings and Algebras (math.RA)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 17D99

description: An algebraic deformation theory of dialgebra morphisms is obtained.
description: 15 pages. To appear in Algebra Colloquium
About Norms and Causes
Creators: name: Kayser, Daniel
name: Nouioua, Farid
Publisher: name: arXiv
Year: 2006
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Knowing the norms of a domain is crucial, but there exist no repository of norms. We propose a method to extract them from texts: texts generally do not describe a norm, but rather how a state-of-affairs differs from it. Answers concerning the cause of the state-of-affairs described often reveal the implicit norm. We apply this idea to the domain of driving, and validate it by designing algorithms that identify, in a text, the "basic" norms to which it refers implicitly.
A deep-learning based raw waveform region-of-interest finder for the liquid argon time projection chamber
Creators: name: ArgoNeuT Collaboration
name: Acciarri, R.
name: Baller, B.
name: Basque, V.
name: Bromberg, C.
name: Cavanna, F.
name: Edmunds, D.
name: Fitzpatrick, R. S.
name: Fleming, B.
name: Green, P.
name: James, C.
name: Lepetic, I.
name: Luo, X.
name: Palamara, O.
name: Scanavini, G.
name: Soderberg, M.
name: Spitz, J.
name: Szelc, A. M.
name: Uboldi, L.
name: Wang, M. H. L. S.
name: Wu, W.
name: Yang, T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The liquid argon time projection chamber (LArTPC) detector technology has an excellent capability to measure properties of low-energy neutrinos produced by the sun and supernovae and to look for exotic physics at very low energies. In order to achieve those physics goals, it is crucial to identify and reconstruct signals in the waveforms recorded on each TPC wire. In this paper, we report on a novel algorithm based on a one-dimensional convolutional neural network (CNN) to look for the region-of-interest (ROI) in raw waveforms. We test this algorithm using data from the ArgoNeuT experiment in conjunction with an improved noise mitigation procedure and a more realistic data-driven noise model for simulated events. This deep-learning ROI finder shows promising performance in extracting small signals and gives an efficiency approximately twice that of the traditional algorithm in the low energy region of $\sim$0.03-0.1 MeV. This method offers great potential to explore low-energy physics using LArTPCs.
description: 15 pages, 12 figures
Duality in dynamic discrete-choice models
Creators: name: Chiong, Khai Xiang
name: Galichon, Alfred
name: Shum, Matt
Publisher: name: arXiv
Year: 2021
Subjects: subject: Econometrics (econ.EM)
subject: FOS: Economics and business

description: Using results from convex analysis, we investigate a novel approach to identification and estimation of discrete choice models which we call the Mass Transport Approach (MTA). We show that the conditional choice probabilities and the choice-specific payoffs in these models are related in the sense of conjugate duality, and that the identification problem is a mass transport problem. Based on this, we propose a new two-step estimator for these models; interestingly, the first step of our estimator involves solving a linear program which is identical to the classic assignment (two-sided matching) game of Shapley and Shubik (1971). The application of convex-analytic tools to dynamic discrete choice models, and the connection with two-sided matching models, is new in the literature.
description: 42 pages, 8 figures
A Simple Operator Check of the Effective Fermion Mode Function during Inflation
Creators: name: Miao, Shun-Pei
name: Woodard, R. P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a relatively simple operator formalism which reproduces the leading infrared logarithm of the one loop quantum gravitational correction to the fermion mode function on a locally de Sitter background. This rule may serve as the basis for an eventual stochastic formulation of quantum gravity during inflation. Such a formalism would not only effect a vast simplification in obtaining the leading powers of $\ln(a)$ at fixed loop orders, it would also permit us to sum the series of leading logarithms. A potentially important point is that our rule does not seem to be consistent with any simple infrared truncation of the fields. Our analysis also highlights the importance of spin as a gravitational interaction that persists even when kinetic energy has redshifted to zero.
description: 39 pages, no figuire.(1) New version has clarified the ultimate motivation by adding sentences to the abstract and to the penultimate paragraph of the introduction. (2) By combining a number of references and equations we have managed to reduce the length by 2 pages
Modelling the chemical evolution of the Milky Way
Creators: name: Matteucci, Francesca
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this review I will discuss the comparison between model results and observational data for the Milky Way, the predictive power of such models as well as their limits. Such a comparison, known as Galactic archaeology, allows us to impose constraints on stellar nucleosynthesis and timescales of formation of the various Galactic components (halo, bulge, thick disk and thin disk).
description: 93 pages,37 figures. Accepted in Astronomy & Astrophysics Review
Economic analysis of coffee supply in Kenya
Creators: name: Gatete, Claver K.
Publisher: name: University of British Columbia
Year: 2008

description: A reduced form supply equation, derived from the structural functions that underlie the coffee supply, is estimated for Kenyan coffee producers. This is because the standard Nerlovian supply response model is not appropriate for a perennial crop such as coffee. The results of the estimated function are used to estimate the changes in producer surplus of the coffee farmers in Kenya. Separate estimates are obtained for estate producers and smallholders because of the fundamental differences in the technologies employed by these two groups. In addition, marketing chains for the two groups are different. Although our final reduced form supply function has the Nerlove's supply reduced equation form, it has the structural nature of a perennial crop. It is different from that obtained by Greenfield and Wickens (1973) and Parikh (1979) in that it includes a risk variable and uses total acreage instead of investment. This study also differs from other studies done on Kenyan coffee supply (Maitha, 1971, Ford, 1971 and Akiyama, 1987) because of the incorporation of a risk variable and the derivation of the expected price using a weighted average revenue price from sales to the International Coffee Organization (ICO) member and nonmember markets when quotas were in effect and the world market otherwise. The results show that coffee farmers have an inelastic response to price and the elasticities fall within the range of those obtained by past studies except the estates' elasticities which are very low. The model uses bootstrapping techniques to analyze the changes in producer surplus caused by a change in producer price of the coffee farmers in Kenya. The bootstrap results show that the bias in producer surplus estimators is quite significant and the coefficient of variation is very high which demonstrates that changes in producer surplus measures can be estimated quite imprecisely. The bootstrap technique provides an accurate method of measuring changes in producer surplus and thus provides a way of measuring the welfare changes of a policy that is intended to increase the producer price. The application of this technique to coffee supply in Kenya assuming a government policy that increases the producer price by 15% results in a bigger percentage change in producer surplus of the smallholders than the estates who have quite low price elasticities.
Field-dependent effects in biological systems
Creators: name: Bizzarri, Mariano
name: Monti, Noemi
name: Minini, Mirko
name: Pensotti, Andrea
Publisher: name: Organisms. Journal of Biological Sciences
Year: 2019

description: A system’s biology perspective implies that, in investigating the logic of complex living organisms, we have to shift from single entities to their mutual correlations. The collective dynamics between cells and their tissues – embedded within a morphogenetic field - makes possible the self-movement of the system, allowing a continuous change of the organism without disrupting its fundamental unity, i.e. preserving hence its internal coherence. Interactions among molecules, usually explained according to a reductionist, ligand-receptor model, occur in a complex biological matrix and their dynamics should be described in accordance with the framework provided by Quantum Electro Dynamics (QED), in order to accommodate with a wide arrays on inexplicable facts (synergy, coherence, long-range interactions, and emergence of ordered structures). Indeed, a vast number of biological processes have already been demonstrated behaving according to Quantum Mechanics rules. Quantum effects are constitutive components of the biological field and they deserve to be carefully investigated to provide a more convincing comprehension of a number of biological phenomena. Within this field, quantum effects alongside with other neglected, weak forces, can participate in shaping critical biological transitions, promoting cooperation between a large number of molecular entities, and leading hence to the emergence of coherent processes.
description: Organisms. Journal of Biological Sciences, Vol 3, no 1 (2019)
Διερεύνηση της ποικιλότητας των κυανοβακτηρίων της Μεσογείου με εργαλεία πληροφορικής της βιοποικιλότητας
Creators: name: Γιουρίεβα, Βικτώρια Σεργκέι
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Πληροφορική της βιοποικιλότητας
Μεσόγειος
Κυανοβακτήρια
Biodiversity Informatics
Mediterranean
Cyanobacteria

description: Η περιοχή της Μεσογείου είναι ένα από τα 25 “θερμά σημεία” βιοποικιλότητας και ένα από τα πέντε με μεσογειακό κλίμα. Παρά το πλήθος ερευνών για τη βιοποικιλότητα που έχουν πραγματοποιηθεί στην περιοχή, ο ακριβής αριθμός των ειδών δεν έχει αποσαφηνιστεί. Επιδίωξη της παρούσας εργασίας αποτελεί η διερεύνηση της ποικιλότητας και της κατανομής των κυανοβακτηρίων στα εσωτερικά ύδατα της περιοχής της Μεσογείου και η ανάλυσή της με εργαλεία πληροφορικής της βιοποικιλότητας. Για τον σκοπό αυτό έγινε αναζήτηση, συγκέντρωση και οργάνωση των δεδομένων σε μια ενιαία βάση δεδομένων της διαθέσιμης επιστημονικής βιβλιογραφίας σχετικής με την παρουσία κυανοβακτηρίων. Ο συνολικός αριθμός των καταχωρήσεων και τάξων κυανοβακτηρίων που βρέθηκαν και χρησιμοποιήθηκαν στις αναλύσεις είναι 3549 και 522 αντίστοιχα και αφορά οχτώ τάξεις, 40 οικογένειες και 126 γένη κυανοβακτηρίων. Παρά το μεγάλο αριθμό τάξων που καταγράφηκε σε αυτή την εργασία, αρκετές περιοχές της περιοχής της Μεσογείου παραμένουν ανεξερεύνητες (π.χ. περιοχές σε ακραίες περιβαλλοντικές συνθήκες) ως προς τη σύνθεση των κυανοβακτηρίων. Για την πλήρη καταγραφή και επέκταση της γνώσης για την ποικιλότητα των κυανοβακτηρίων απαιτείται συστηματική έρευνα. Με τη χρήση των εργαλείων της Πληροφορικής της βιοποικιλότητας επιτυγχάνεται η εύρεση γνωστικών κενών και η διάχυση της επιστημονικής πληροφορίας κάνοντας πιο εύκολη τη μελέτη της διατήρησης της βιοποικιλότητας.
description: The Mediterranean region is considered one of the 25 worldwide hotspots for biodiversity and one of five with Mediterranean climate. Despite the large number of studies conducted in the Mediterranean region, the exact number of species which inhabit it has not been defined, yet, especially in the case of microorganisms whose diversity remains relatively unknown. The aim of this study was to investigate cyanobacterial diversity and distribution in Mediterranean freshwater ecosystems by utilizing biodiversity informatics tools. For this purpose, research of the available scientific literature, regarding cyanobacteria occurrence was carried out and the data collected were aggregated in a single list. A total number of 3549 records and 522 taxa, belonging to eight orders, 40 families and 126 genera, were found and used for further analyses. Although, a high number of taxa was recorded in this work, many sources remain underrepresented (e.g. extreme environments), concerning cyanobacterial diversity knowledge. Therefore, an approach of systematic research to broaden our knowledge in this topic is considered needed. Biodiversity informatics tools are highly useful for the identification of knowledge gaps and the dissemination of scientific information, assisting the work of biodiversity conservation.
A Note on Boolean Lattices and Farey Sequences
Creators: name: Matveev, Andrey O.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 05A19, 11B65

description: We establish monotone bijections between the Farey sequences of order m and the halfsequences of Farey subsequences associated with the rank m elements of the Boolean lattice of subsets of a 2m-set. We also present a few related combinatorial identities.
description: 8 pages; published version
Hadronic parity violation in $\vec{n} p \to d γ$ with effective field theory
Creators: name: Hyun, C. H.
name: Ando, S.
name: Desplanques, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The parity-violating nucleon-nucleon (NN) potential is considered up to next-to-next-to leading order in heavy-baryon chiral perturbation theory. We include one-pion exchange at leading order and the two-pion exchange and two-nucleon contact terms at next-to-next-to-leading order. The effects of intermediate (two-pion exchange) and short-range (two-nucleon contact) terms are probed by calculating the photon asymmetry $A_γ$ in $\vec{n} p \to d γ$ employing Siegert's theorem and an accurate phenomenological potential for the parity-conserving NN interaction. We explore in detail the uncertainties due to the parameters that control the contribution of the short-range interaction. We obtain about 20% uncertainty in the value of $A_γ$ up to the next-to-next-to leading order. We discuss the implication of this uncertainty for the determination of the weak pion-nucleon coupling constant and how the uncertainty can be reduced.
description: Minor changes in the text. To appear in PLB
Universal lepton universality violation in exclusive processes
Creators: name: Dai, Lin
name: Kim, Chul
name: Leibovich, Adam K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In high energy exclusive processes involving leptons, QED corrections can be sensitive to infrared scales like the lepton mass and the soft photon energy cut, resulting in large logarithms that need to be resummed to all order in $α$. When considering the ratio of the exclusive processes between two different lepton flavors, the ratio $R$ can be expressed in terms of factorized functions in the decoupled leptonic sectors. While some of the functional terms cancel, there remain the large logarithms due to the lepton mass difference and the energy cut. This factorization process can be universally applied to the exclusive processes such as $Z\to l^+l^-$ and $B^-\to l^-\barν_l$, where the resummed result in the ratio gives significant deviations from the naive expectation from lepton universality.
description: 6 pages, 2 figures, matches the published version in PRD
Pseudochaotic poloidal transport in the laminar regime of the resistive ballooning instabilities
Creators: name: Calvo, Ivan
name: Garcia, Luis
name: Carreras, Benjamin A.
name: Sanchez, Raul
name: van Milligen, Boudewijn Ph.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: In toroidal geometry, and prior to the establishment of a fully developed turbulent state, the so-called topological instability of the pressure-gradient-driven turbulence is observed. In this intermediate state, a narrow spectral band of modes dominates the dynamics, giving rise to the formation of iso-surfaces of electric potential with a complicated topology. Since E x B advection of tracer particles takes place along these iso-surfaces, their topological complexity affects the characteristic features of radial and poloidal transport dramatically. In particular, they both become strongly non-diffusive and non-Gaussian. Since radial transport determines the system confinement properties and poloidal transport controls the equilibration dynamics (on any magnetic surface), the development of non-diffusive models in both directions is thus of physical interest. In previous work, a fractional model to describe radial transport was constructed by the authors. In this contribution, recent results on periodic fractional models are exploited for the construction of an effective model of poloidal transport. Numerical computations using a three-dimensional reduced magnetohydrodynamic set of equations are compared with analytical solutions of the fractional periodic model. It is shown that the aforementioned analytical solutions accurately describe poloidal transport, which turns out to be superdiffusive with index $α=1$.
description: 17 pages, 6 figures. Accepted for publication in Phys. Plasmas
Chiral excitations of open-beauty systems
Creators: name: Guo, Xiao-Yu
name: Lutz, Matthias F. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study the scattering of open-beauty mesons and Goldstone bosons as predicted by the chiral SU(3) Lagrangian. The impact of subleading order chiral interactions to systems with $J^P= 0^+$ and $J^P=1^+$ quantum numbers is worked out. We estimate the relevant low-energy coefficients from the open-charm sector, for which their values have been determined previously from sets of QCD lattice data. The leading order heavy-quark symmetry breaking effects are estimated by matching the $B$-meson ground-state chiral mass formula to the mass formula from the heavy-quark effective theory. We make refined predictions for the flavor anti-triplet and sextet resonances that are generated dynamically by coupled-channel interactions.
First-order phase transition in easy-plane quantum antiferromagnets
Creators: name: Kragset, S.
name: Smorgrav, E.
name: Hove, J.
name: Nogueira, F. S.
name: Sudbo, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Quantum phase transitions in Mott insulators do not fit easily into the Landau-Ginzburg-Wilson paradigm. A recently proposed alternative to it is the so called deconfined quantum criticality scenario, providing a new paradigm for quantum phase transitions. In this context it has recently been proposed that a second-order phase transition would occur in a two-dimensional spin 1/2 quantum antiferromagnet in the deep easy-plane limit. A check of this conjecture is important for understanding the phase structure of Mott insulators. To this end we have performed large-scale Monte Carlo simulations on an effective gauge theory for this system, including a Berry phase term that projects out the $S=1/2$ sector. The result is a first-order phase transition, thus contradicting the conjecture.
description: 4 pages, 4 figures. Stylistic changes, references added
TIME OUT - Μουσειοπαιδαγωγική πρόταση προγράμματος «αργής τέχνης» για ηλικιακή ομάδα εφήβων (14-17) με θέμα την ταυτότητα
Creators: name: Γκολφινοπούλου, Ελένη Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Αργή τέχνη
Μουσειοπαιδαγωγική
Ταυτότητα
Slow Art
Museum education
Identity

description: Η παρούσα εργασία αποτελεί μια μουσειοπαιδαγωγική πρόταση για ένα μακροπρόθεσμο εκπαιδευτικό πρόγραμμα 10 + 1 συναντήσεων που απευθύνεται σε εφήβους, με τίτλο “Time Out”. Πρόκειται για ένα πρόγραμμα που αφορά την προσέγγιση της αργής τέχνης (slow art), ενω το κοινό νήμα που ενώνει τις συναντήσεις είναι η έννοια της “ταυτότητας”. Το πρόγραμμα αυτό στοχεύει να υλοποιηθεί σε τρία μουσεία της Θεσσαλονίκης: το Μουσείο Κινηματογράφου, το MOMus - Μουσείο Φωτογραφίας καθώς και το MOMus - Μουσείο Σύγχρονης Τέχνης. H εργασία περιλαμβάνει στο πρώτο μέρος τις θεωρητικές αφετηρίες σχετικά με την προσέγγιση της αργής τέχνης και τη διδακτική της τέχνης, ενώ αναλύονται οι διδακτικές μέθοδοι που θα χρησιμοποιηθούν, οι ιδιαιτερότητες των εφήβων καθώς και κάποια ζητήματα ταυτότητας. Στο δεύτερο μέρος παρουσιάζονται τα μουσεία και οι χώροι στα οποία θα λάβει χώρα το εκπαιδευτικό πρόγραμμα, ενώ γίνεται και μια αναλυτική παρουσίαση της δομής και των στόχων κάθε συνάντησης του προγράμματος καθώς και προτάσεις αξιολόγησής του. Στο τέλος ακολουθούν περαιτέρω προτάσεις και προβληματισμοί πάνω στο εκπαιδευτικό πρόγραμμα.
description: The present thesis is a proposition for a long-term museum education program for teenagers with 10 + 1 meetings, called ‘Time Out”. It is a program that is based on the “slow art” approach and the common thread that connects the meetings is the notion of “identity”. This program aims to be implemented in three museums of Thessaloniki: the Cinema Museum, the MOMus-Museum of Photography and the MOMus-Museum of Contemporary Art. The thesis analyzes the theoretical bases considering the slow art approach and art teaching, in addition to the teaching methods that will be used, the characteristics of teenagers as well as some identity issues. In the second part the museums and the spaces where the program will take place are presented, and there is also an extensive presentation of the structure and the objectives of every program’s meeting, along with evaluation propositions. In the end, further propositions and concerns around the education program are presented.
description: Σε συνεργασία με: Παιδαγωγικό Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)