cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Unified approach to secondary effects on the CMB B-mode polarization
Creators: name: Namikawa, Toshiya
name: Naruko, Atsushi
name: Saito, Ryo
name: Taruya, Atsushi
name: Yamauchi, Daisuke
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We develop a systematic and unified approach to estimate all possible secondary (i.e. non-primordial) nonlinear effects to the cosmic microwave background (CMB) polarization, named curve-of-sight integration approach. In this approach, the Boltzmann equation for polarized photons is rewritten in a line-of-sight integral along an exact geodesic in the perturbed universe, rather than a geodesic in the background universe used in the linear-order CMB calculation. This approach resolves the difficulty to solve the Boltzmann hierarchy with the nonlinear gravitational effects in the photon free-streaming regime and thus unifies the standard remapping approach for CMB lensing into the direct approach solving the Boltzmann equation for the nonlinear collisional effects. In this paper, we derive formulae that: (i) include all the nonlinear effects; (ii) can treat extended sources such as the contributions after the reionization. It offers a solid framework to discuss possible systematics in the standard estimation of CMB lensing by the remapping approach. As an explicit demonstration, we estimate the secondary B-mode power spectrum induced by all foreground gravitational effects: lensing, redshift, time-delay, emission-angle, and polarization-rotation effects. We define these effects properly so that they do not have any overlap, also without overlooking any effect. Then, we show that these effects only give corrections of the order of 0.001-0.01% to the standard lensing-induced B-mode power spectrum in the concordance $Λ$ cold dark matter model. Our result confirms the reliability of using the remapping approach in upcoming CMB experiments aiming to detect the primordial gravitational waves with the tensor-to-scalar ratio of $r \sim 10^{-3}$.
description: 38+13 pages, 13 figures; published version, elaborated discussions on the polarization-rotation effect in section 3.2 and appendix E, the gauge issue in section 3.3
Capitalizing on experience to experiment and innovate : feedback and reflection on the future of the Huma-Num research infrastructure.
Creators: name: POUYLLAU, Stéphane
name: SILVESTRE DE SACY, Antoine
name: MARONET, Léa
name: FACI, Adam
Publisher: name: HN Lab
Year: 2024
Subjects: infrastructure
IA
France
IT Services

description: The French national research infrastructure Huma-Num has just celebrated its tenth anniversary. We feel that this is an opportune moment to take a step back and reflect on the past ten years, combining the experience gained with the innovation required of any infrastructure.
Decompositions of the free product of graphs
Creators: name: Accardi, Luigi
name: Lenczewski, Romuald
name: Salapata, Rafal
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 05C50, 46L54, 47A10

description: We study the free product of rooted graphs and its various decompositions using quantum probabilistic methods. We show that the free product of rooted graphs is canonically associated with free independence, which completes the proof of the conjecture that there exists a product of rooted graphs canonically associated with each notion of noncommutative independence which arises in the axiomatic theory. Using the `orthogonal product' of rooted graphs, we decompose the branches of the free product of rooted graphs as `alternating orthogonal products'. This leads to alternating decompositions of the free product itself, with the star product or the comb product followed by orthogonal products. These decompositions correspond to the recently studied decompositions of the free additive convolution of probability measures in terms boolean and orthogonal convolutions, or monotone and orthogonal convolutions. We also introduce a new type of `quantum decomposition' of the free product of graphs, where the distance partition of the set of vertices is taken with respect to a set of vertices instead of a single vertex. We show that even in the case of widely studied graphs this yields new and more complete information on their spectral properties, like spectral measures of a (usually infinite) set of cyclic vectors under the action of the adjacency matrix.
description: 35 pages, 8 figures
title: Ordnung des Zentrums für deutschsprachige Gegenwartsliteratur (ZdG) der Fakultät für Kulturwissenschaften der Universität Paderborn
title: vom 19. Juli 2019
titleType: Subtitle
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2019

description: Amtliche Mitteilungen / Universität Paderborn
Triangle inequalities in path metric spaces
Creators: name: Kapovich, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: Metric Geometry (math.MG)
subject: Differential Geometry (math.DG)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 51K05

description: We study side-lengths of triangles in path metric spaces. We prove that unless such a space X is bounded, or quasi-isometric to line or half-line, every triple of real numbers satisfying the strict triangle inequalities, is realized by the side-lengths of a triangle in X. We construct an example of a complete path metric space quasi-isometric to the Euclidean plane, for which every degenerate triangle has one side which is shorter than a certain uniform constant.
description: 21 pages, 6 figures
Tree tensor-network real-time multiorbital impurity solver: Spin-orbit coupling and correlation functions in Sr$_2$RuO$_4$
Creators: name: Cao, X.
name: Lu, Y.
name: Hansmann, P.
name: Haverkort, M. W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present a tree tensor-network impurity solver suited for general multiorbital systems. The network is constructed to efficiently capture the entanglement structure and symmetry of an impurity problem. The solver works directly on the real-time/frequency axis and generates spectral functions with energy-independent resolution of the order of one percent of the correlated bandwidth. Combined with an optimized representation of the impurity bath, it efficiently solves self-consistent dynamical mean-field equations and calculates various dynamical correlation functions for systems with off-diagonal Green's functions. For the archetypal correlated Hund's metal Sr$_2$RuO$_4$, we show that both the low-energy quasiparticle spectra related to the van Hove singularity and the high-energy atomic multiplet excitations can be faithfully resolved. In particular, we show that while the spin-orbit coupling has only minor effects on the orbital-diagonal one-particle spectral functions, it has a more profound impact on the low-energy spin and orbital response functions.
description: Updated results with SOC; as published
title: Bekanntmachung der Aufwandsentschädigung des Hochschulrats der Universität Paderborn für den Zeitraum vom 01.04.2018 bis zum 31.03.2019
title: vom 19. Juli 2019
titleType: Subtitle
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2019

description: Amtliche Mitteilungen / Universität Paderborn
Aqueous chemistry of vanadium complexes of therapeutic interest
Creators: name: Glover, Nicholas
Publisher: name: University of British Columbia
Year: 2009

description: The aqueous chemistry of bis(maltolato)oxovanadium(IV), VO(ma)₂, bis(kojato)oxovandium(IV, VO(ka)₂, and bis(maltolato)dioxovandate(V), [VO₂(ma)₂] were studied as part of a research interest regarding their potential as insulin mimetic therapeutic agents. UV-Visible spectroscopy provided information regarding changes in the immediate vanadium environment with variable pH, and determined that oxidation of VO(ma)₂ and VO(ka)₂ occurs upon exposure to air. Variable pH cyclic voltammetric electrochemical investigation of the compounds of interest revealed that only VO(ma)₂ displayed reversible electrochemical behaviour. Room temperature and frozen solution ESR spectral parameters for the complexes were determined. Reduction of [VO₂(ma)₂]⁻ to VO(ma)₂ in acidic solution was determined by ESR spectroscopy. ⁵¹V NMR spectroscopy was used to probe the type, and stoichiometry, of complexes present in aqueous solution as a function of pH. Oxidation of VO(ma)₂ and VO(ka)₂ to vanadium(V) complexes was proven by ⁵¹V NMR spectra. Potentiometric titrations were used to determine ligand protonation constants, and metal-ligand stability constants.
Η εκπαίδευση των αλλόγλωσσων παιδιών με ειδικές εκπαιδευτικές ανάγκες
Creators: name: Τσέτσερη, Μαρία Στεφάνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Διγλωσσία
Δίγλωσση εκπαίδευση
Ειδικές εκπαιδευτικές ανάγκες
Bilingualism
Bilingual education
Special educational needs

description: Στην παρούσα εργασία θα εξετάσουμε το ζήτημα της διγλωσσίας και πώς συνδέεται με τις ειδικές εκπαιδευτικές ανάγκες. Η διγλωσσία είναι ένα φαινόμενο ευρέως διαδεδομένο καθώς αρκετά άτομα είναι δίγλωσσα, εφόσον έχουν αλλάξει οι ανάγκες των ανθρώπων. Γι’ αυτόν τον λόγο, παρατηρούνται συχνά αρκετές μετακινήσεις πληθυσμών για την εκπλήρωση των αναγκών τους, όπως είναι η καλύτερη ποιότητα ζωής, επαγγελματική αποκατάσταση κτλ. Άλλος ένας λόγος, είναι οι γάμοι μεταξύ εθνών. Επομένως, υπάρχουν όλο και περισσότερα άτομα που μπορούν να μιλούν και να χειρίζονται σε ικανοποιητικό βαθμό δυο ή οι περισσότερες γλώσσες. Υπάρχουν, όμως, παιδιά, τα οποία αντιμετωπίζουν δυσκολίες κατά τη μαθησιακή διαδικασία. Παράλληλα, ένα φαινόμενο της εποχής είναι οι ειδικές εκπαιδευτικές ανάγκες. Για την κατανόηση και τη βελτίωση τους από τα παιδιά, γονείς και εκπαιδευτικοί πρέπει να συμμετέχουν, να συνεργάζονται και να παρατηρούν την κάθε κατάσταση, καθώς και να λάβουν κατάλληλη εκπαίδευση και κατάρτιση, ώστε να αντιμετωπίζουν την κάθε περίπτωση με τον καταλληλότερο τρόπο, παρέχοντας την απαιτούμενη μέριμνα και παρέμβαση. Εντούτοις, η διγλωσσία συνδυάζεται με τις ΕΕΑ και ενδέχεται να έχει αρνητικές συνέπειες στην γλωσσική ανάπτυξη του μαθητή. Επομένως, η ενδελεχής γνώση στο ζήτημα της διγλωσσίας σε συνδυασμό με τις ειδικές εκπαιδευτικές ανάγκες θα δώσει σημαντικές πληροφορίες για την αναγνώριση και την σωστή και κατάλληλη παρέμβαση. Έτσι, είναι σημαντική η ανάπτυξη και η προώθηση των γλωσσικών διαταραχών που παρατηρούνται στη δίγλωσση και στη διαπολιτισμική εκπαίδευση
description: In this thesis we are going to discuss the issue of bilingualism and multilingualism. Bilingualism and multilingualism are very common phenomena and a natural outcome of contemporary societies, whose multicultural needs have resulted in a big number of bilingual people and require sufficient use of two or more languages. In this context, however, children needing to speak sufficiently- and cope with- two or more languages may face difficulties in learning. At the same time, another big phenomenon of modern societies is the development of knowledge and research in special educational needs. Parents and educators need to be observant and ready to always participate and collaborate towards providing the children with the support to their educational and psychological needs. When bilingualism and special educational needs co-exist, they create more difficulties in the learning process. Therefore, research and knowledge on the matter can facilitate learning for the bilingual children with special educational needs. This paper presents a literature review of the relationship of bilingualism and special educational needs and how it affects students
From real affine geometry to complex geometry
Creators: name: Gross, Mark
name: Siebert, Bernd
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Geometry (math.AG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 14J32

description: We construct from a real affine manifold with singularities (a tropical manifold) a degeneration of Calabi-Yau manifolds. This solves a fundamental problem in mirror symmetry. Furthermore, a striking feature of our approach is that it yields an explicit and canonical order-by-order description of the degeneration via families of tropical trees. This gives complete control of the B-model side of mirror symmetry in terms of tropical geometry. For example, we expect our deformation parameter is a canonical coordinate, and expect period calculations to be expressible in terms of tropical curves. We anticipate this will lead to a proof of mirror symmetry via tropical methods. This paper is the key step of the program we initiated in math.AG/0309070.
description: v3: 128 pages, published version
Contesting Conceptual Boundaries: Byzantine Literature and Its History
Creators: name: Agapitos, Panagiotis A.
Publisher: name: University of Milan
Year: 2015
Subjects: Byzantine literature; literary periodization; paradigm shift; Medieval Greek language; taxonomical criteria

description: The paper presents the problems of writing a history of Byzantine literature in the context of postmodern anxieties about canonization, authority and narrative histories of literature. An essential difficulty for such a project is the fact that Byzantine literature has been viewed as a continuation of or appendix to Ancient Greek literature, while, on the other, it has been divided into 'learned' and 'vernacular', the latter category having been defined as Modern Greek since the middle of the nineteenth century. The paper offers two sets of criteria for establishing new concepts of periodization and taxonomy. A series of examples are indicatively adduced in order to explain the scientific and ideological impasse in which Byzantine Studies have found themselves at the end of the previous century, while delineating a proposal for a different approach to content and structure of a wider synthesis. Writing a ‘new’ history of Byzantine literature is an experiment in proposing a radical paradigm shift by means of which this particular literary production in Medieval Greek can be studied within the broader context of Medieval European literatures as an integrated entity rather than as a separate and peripheral phase in the histories of Ancient or Modern Greek literature.
description: Interfaces: A Journal of Medieval European Literatures, No 1 (2015): Histories of Medieval European Literatures: New Patterns of Representation and Explanation
Εκπαιδευτικό εργαλείο και διδασκαλία της αγγλικής γλώσσας σε μαθητές με μαθησιακές δυσκολίες: Μελέτη περίπτωσης
Creators: name: Πιστόκουλα, Μαρία Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ξένες γλώσσες
Μαθησιακές δυσκολίες
Εκπαιδευτικό εργαλείο
Language learning
Learning difficulties
Educational tool

description: Οι μαθησιακές δυσκολίες αποτελούν ένα από τα πιο βασικά θέματα που απασχολούν την εκπαιδευτική κοινότητα τις τελευταίες δεκαετίες. Η γνώση που αποκτήθηκε από έρευνες σε θεωρητικό επίπεδο, οδήγησε στη διαμόρφωση μεθοδολογιών και στρατηγικών διδασκαλίας και εκμάθησης που ανταποκρίνονται στις ανάγκες των μαθητών και μαθητριών ανά τον κόσμο, αλλά και στο ελληνικό σχολείο, συγκεκριμένα. Η διδασκαλία και εκμάθηση των ξένων γλωσσών είναι στο επίκεντρο αυτών των ερευνών, καθώς πολλοί ερευνητές και εκπαιδευτικοί προσπάθησαν να διευκολύνουν την εκμάθηση και διδασκαλία τους στα σύγχρονα εκπαιδευτικά συστήματα. Η παρούσα εργασία εξετάζει τη διδασκαλία των ξένων γλωσσών σε μαθητές και μαθήτριες με μαθησιακές δυσκολίες, και εστιάζει στις μεθόδους διαφοροποιημένης διδασκαλίας κατά τη διδασκαλία των ξένων γλωσσών (ΞΓ) και συγκεκριμένα της δεύτερης γλώσσας (Γ2), με στόχο της αποτελεσματικότερη εκμάθηση, και την προσωποποιημένη διδασκαλία. Για τις ανάγκες της έρευνας δημιουργήθηκε ένα εκπαιδευτικό εργαλείο-παιχνίδι, που στόχο είχε να παρέμβει στις συντακτικές δυσκολίες που συναντούν οι Έλληνες μαθητές και μαθήτριες με δυσλεξία, κατά την εκμάθηση της αγγλικής ως Γ2. Η έρευνα πραγματοποιήθηκε σε έναν μαθητή γυμνασίου με διαγνωσμένη δυσλεξία και έδειξε ότι υπήρξε βελτίωση στην κατανόηση και χρήση των συντακτικών δομών της αγγλικής γλώσσας, αλλά το παιχνίδι, και, συνεπώς, η μεθοδολογία που ακολουθήθηκε παρουσιάζει περιθώρια εξέλιξης
description: Learning difficulties have been at the centre of educational research the last few decades, which led to new differentiated approaches of teaching and learning. The teaching and learning of new languages were very much affected by the new methodologies, in order to facilitate the educational process and reflect the needs and abilities of all students. The present thesis discusses differentiated foreign language (FL) teaching to students with learning difficulties and, specifically, the English language as a second language (L2) in the Greek educational system. For the needs of this research, an educational tool was created and used in a case study, on a Greek middle school student, with diagnosed dyslexia. The aim of this case study was to assess whether this tool was able to improve the student’s skills in syntactical structures in English (L2). The results of the research showed that the student had some improvement when it came to knowledge and use of syntactical structures in English. Nevertheless, there are changes to be made to the methodology and the tool used, towards more efficient and personalized results
Influence of microwave annealing on GMI response and magnetization of an amorphous Fe73.5Nb3Cu1Si13.5B9 ribbon
Creators: name: Kaviraj, B.
name: Ghatak, S. K
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The resistive and reactive components of magneto-impedance was studied for the as-quenched and microwave annealed amorphous Fe73.5Nb3Cu1Si13.5B9 ribbon as a function of biasing d.c magnetic fields (-60 to +60 Oe) and excitation frequencies (0.1, 1, 10 and 20MHz). The magneto-impedance (both components) response was much reduced for the microwave annealed ribbon and the changes were more discernable at higher excitation frequencies. The imaginary component of magneto-impedance showed maxima at finite (non-zero) d.c magnetic fields for both the as-quenched and microwave annealed ribbons. Magnetization measurements performed for both the as-quenched and microwave annealed ribbons revealed the magnetic hardness of the latter. The initial susceptibility decreases by two orders of magnitude for the microwave-annealed ribbon. XRD measurements indicated the transformation of the surface of the ribbon from the amorphous state to the crystalline one.
description: 14 pages, 6 figures
Deutsch/Romanisch - Lateinisch/Deutsch: Neue Thesen zu den Pariser Gesprächen und zu den Kasseler Glossen
Creators: name: Kragl, Florian
Publisher: name: University of Milan
Year: 2015

description: Literary history projects the clear image that the beginnings of German literature lie in the 8th and 9th century, the Old High German period, when German literature first flourished with texts like the Hildebrandslied or Otfrids Evangelienbuch. The Old High German period is presented as a compact formation, precisely defined in time and space, of high literary value and ‘national’ coinage. The following paper attempts, in a preliminary manner, to question this notion by arguing that it is high time to free Old High German literature from the pathos of 19th century research. Its topic is language contact between German on the one hand and Latin / Romance on the other, albeit not in terms of high culture, but of language acquisition. It therefore deals with literature in the etymological sense of ‘written with letters’: the so-called ‘Old High German’ or ‘Parisian Conversations’ and the ‘Kasseler Glosses’ or ‘Conversations’.
description: Interfaces: A Journal of Medieval European Literatures, No 1 (2015): Histories of Medieval European Literatures: New Patterns of Representation and Explanation
Η ποιότητα ζωής ενήλικων ατόμων με νοητική ανεπάρκεια μέσα από τις απόψεις των γονέων τους
Creators: name: Λοβάτση, Μαρία Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ειδικές Ανάγκες
Νοητική Ανεπάρκεια
Ποιότητα Ζωής
Special Needs
Intellectual Disability
Quality of life

description: Η παρούσα έρευνα στοχεύει στη διερεύνηση της ποιότητας ζωής των ατόμων με νοητική ανεπάρκεια, χρησιμοποιώντας ερωτηματολόγιο σε δείγμα 40 ατόμων, το οποίο συμπληρώθηκε από τους γονείς των ατόμων αυτών. Αρχικά παρουσιάζονται οι έννοιες που πραγματεύονται, ακολουθεί η ανάλυση της σημασίας της ποιότητας ζωής καθώς και της επιρροής των ατόμων με νοητική ανεπάρκεια στην οικογένεια τους. Η αναπηρία γενικά, έχει σημαντική επίδραση στην συνολική ποιότητα όχι μόνο στη ζωή του ίδιου του ατόμου, αλλά και της οικογένειας του. Την τελευταία δεκαετία έχουν γίνει αρκετές προσπάθειες για τη βελτίωση της παρούσης κατάστασης και τη βελτίωση της ποιότητας ζωής τόσο των ατόμων με ειδικές ανάγκες, όσο και των οικογενειών τους. Στη συνέχεια αναλύονται παλαιότερες έρευνες σχετικά με την ποιότητα ζωής ατόμων με νοητική ανεπάρκεια και έπειτα γίνεται η παρουσίαση της έρευνας, η μεθοδολογία, η ανάλυση των δεδομένων και τα ευρήματα της έρευνας. Η εργασία καταλήγει με τα συμπεράσματα και τους περιορισμούς της ερευνητικής διαδικασίας
description: The present study aims to investigate the quality of life of people with disabilities, using a sample of 40 parents who filled in a questionnaire about their children’s life. Firstly, the definitions of the topic are presented and analysis of the importance of quality of life as well as the influence of people with intellectual disability on their family follows. Disability in general has a significant impact on the overall quality of life not only of one’s own life but also of one’s family. This impact is usually negative, however, in the last decade several efforts have been made to improve the present situation and improve the quality of life of both people with disabilities and their families. Older research on the quality of life of people with intellectual disability is then analyzed and after that the research presentation, methodology, data analysis and research findings are presented. The study ends up with the conclusions and limitations of the research process
Supplementary document for All-optical nanoscopic spatial control of molecular reaction yields on nanoparticles - 5778319.pdf
Creators: name: Bergues, Boris
name: Zhang, Wenbin
name: Dagar, Ritika
name: Rosenberger, Philipp
name: Sousa-Castillo, Ana
name: Neuhaus, Marcel
name: Li, Weiwei
name: Khan, Sharjeel
name: Alnaser, A.S.
name: Cortés, Emiliano
Publisher: name: Optica Publishing Group
Year: 2022
Subjects: Optical Physics not elsewhere classified

description: Supplementary information
The Killing superalgebra of ten-dimensional supergravity backgrounds
Creators: name: Figueroa-O'Farrill, José
name: Hackett-Jones, Emily
name: Moutsopoulos, George
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct the Killing superalgebra of supersymmetric backgrounds of ten-dimensional heterotic and type II supergravities and prove that it is a Lie superalgebra. We also show that if the fraction of supersymmetry preserved by the background is greater than 1/2, in the heterotic case, or greater than 3/4 in the type II case, then the background is locally homogeneous.
description: 21 pages; V2: 3 references added; V3: 1 reference added and two imprecisions corrected; V4: small changes due to error in a separate paper
title: Serruria :
title: Richtlinien für die Durchführung der Prüfung auf Unterscheidbarkeit, Homogenität und Beständigkeit.
titleType: Subtitle
Creators: name: International Union For The Protection Of New Varieties Of Plants,
Publisher: name: International Union for the Protection of New Varieties of Plants,
Year: 0
Subjects: Group identity.
New Varieties of Plants
Serruria

description: Zweck dieser Richtlinien („Prüfungsrichtlinien“) ist es, die in der Allgemeinen Einführung (Dokument TG/1/3) und deren verbundenen TGP-Dokumenten enthaltenen Grundsätze in detaillierte praktische Anleitung für die harmonisierte Prüfung der Unterscheidbarkeit, der Homogenität und der Beständigkeit (DUS) umzusetzen und insbesondere geeignete Merkmale für die DUS-Prüfung und die Erstellung harmonisierter Sortenbeschreibungen auszuweisen.
Host-star and exoplanet compositions: a pilot study usinga wide binary with a polluted white dwarf
Creators: name: Bonsor, Amy
name: Jofre, Paula
name: Shorttle, Oliver
name: Rogers, Laura K
name: Xu, Siyi
name: Melis, Carl
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Planets and stars ultimately form out of the collapse of the same cloud of gas. Whilst planets, and planetary bodies, readily loose volatiles, a common hypothesis is that they retain the same refractory composition as their host star. This is true within the Solar System. The refractory composition of chondritic meteorites, Earth and other rocky planetary bodies are consistent with solar, within the observational errors. This work aims to investigate whether this hypothesis holds for exoplanetary systems. If true, the internal structure of observed rocky exoplanets can be better constrained using their host star abundances. In this paper, we analyse the abundances of the K-dwarf, G200-40, and compare them to its polluted white dwarf companion, WD 1425+540. The white dwarf has accreted planetary material, most probably a Kuiper belt-like object, from an outer planetary system surviving the star's evolution to the white dwarf phase. Given that binary pairs are chemically homogeneous, we use the binary companion, G200-40, as a proxy for the composition of the progenitor to WD 1425+540. We show that the elemental abundances of the companion star and the planetary material accreted by WD 1425+540 are consistent with the hypothesis that planet and host-stars have the same true abundances, taking into account the observational errors.
description: 8 pages, MNRAS in press, mistake in star names corrected
Comparison of Default Mode Network and Task-Positive Network during rest and task: A Graph Theory approach
Creators: name: Ντουμάνης, Ιωάννης Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Δίκτυο Default Mode
Θεωρία Δικτύων
Μηχανική Μάθηση
Default Mode Network
Graph Theory
Machine Learning

description: Τα δίκτυα εγκεφάλου Default Mode Network και Task-Positive Network μελετώνται τόσο κατά τη διάρκεια ηρεμίας, όσο και κατά τη διάρκεια προσοχής, με χρήση Θεωρίας Δικτύων. Πιο συγκεκριμένα, χρησιμοποιούνται 32 δείκτες από τη Θεωρία Δικτύων, με σκοπό τη σύγκριση των δύο δικτύων του εγκεφάλου, καθώς επίσης και τη σύγκριση κάθε ενός δικτύου εγκεφάλου, ανάμεσα στις δύο καταστάσεις (ηρεμία, προσοχή). Αρχικά, παρέχεται μια περιγραφή των δεδομένων fMRI, και παρουσιάζεται ο τρόπος κατασκευής των δικτύων. Στη συνέχεια, παρουσιάζονται οι 32 δείκτες που χρησιμοποιούνται και τα αποτελέσματα συγκρίνονται μεταξύ δικτύων, αλλά και μεταξύ καταστάσεων, με χρήση ANOVA. Τέλος, 2 αλγόριθμοι ταξινόμησης αναπτύσσονται, με σκοπό την ταξινόμηση των δικτύων σε “ηρεμία” ή “προσοχή”, βάσει των 32 δεικτών που υπολογίστηκαν. Υπάρχουν 4 καινοτομίες στην παρούσα εργασία: (i) ο υπολογισμός ενός μεγάλου αριθμού (32) δεικτών για την ανάλυση των δικτύων του εγκεφάλου, (ii) ο υπολογισμός του “effect size” για την ερμηνεία των αποτελεσμάτων των τεστ ANOVA, (iii) η χρήση τριών μέτρων εξάρτησης για την κατασκευή των δικτύων, συμπεριλαμβανομένων συμμετρικών και ασύμμετρων μέτρων, και (iv) η ανάπτυξη δύο αλγορίθμων ταξινόμησης, οι οποίοι προβλέπουν αν τα δεδομένα αντιστοιχούν σε ηρεμία ή προσοχή
description: The Default Mode Network (DMN) and the Task Positive Network (TP) are studied both during rest and during task, using Graph Theoretic tools. In speciﬁc, 32 statistical indices from Graph Theory have been used, in order to compare the two networks in both states, as well as each network between the two states. Firstly, a description of fMRI data is provided and information about how the networks were constructed. Then, the indices are described and the results are compared between networks and states, using ANOVA. Lastly, 2 classiﬁcation algorithms are developed, in order to classify the graphs in resting-state or task, by taking the indices as input. There are four novelties in this work, namely: (i) the analysis of the above networks in terms of a large (32) number of indices, (ii) the calculation of the eﬀect size prior to the interpretation of the ANOVA tests, (iii) the use of three diﬀerent dependency measures for the construction of graphs, including directed and undirected measure, and (iv) the development of two diﬀerent classiﬁers to classify the graphs in the two states
Evidence for a High Carbon Abundance in the Local Interstellar Cloud
Creators: name: Slavin, Jonathan D.
name: Frisch, Priscilla C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The nature of the Local Interstellar Cloud (LIC) is highly constrained by the combination of in situ heliospheric and line-of-sight data towards nearby stars. We present a new interpretation of the LIC components of the absorption line data towards epsilon CMa, based on recent atomic data that include new rates for the Mg+ to Mg0 dielectronic recombination rate, and using in situ measurements of the temperature and density of neutral helium inside of the heliosphere. With these data we are able to place interesting limits on the gas phase abundance of carbon in the LIC. If the C/S abundance ratio is solar, ~20, then no simultaneous solution exists for the N(Mg I), N(Mg II), N(C II) and N(C II*) data. The combined column density and in situ data favor an abundance ratio A(C)/A(S) = 47 +22 -26. We find that the most probable gas phase C abundance is in the range 400 to 800 ppm with a lower limit of ~330. We speculate that such a supersolar abundance could have come to be present in the LIC via destruction of decoupled dust grains. Similar enhanced C/H ratios are seen in very low column density material, N(H) < 10^19 cm^-2, towards several nearby stars.
description: 11 pages, 1 figure, Accepted for publication in ApJ Letters
Μη ομογενής διαδικασία Ornstein-Uhlenbeck
Creators: name: Παπακαρμέζης, Δημήτριος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Mη Ομογενής Διαδικασία Ornstein-Uhlenbeck
Πολυδιάστατη Μη Ομογενής Διαδικασία Ornstein-Uhlenbeck
Ολοκλήρωμα Ito
Nonhomogeneous Ornstein-Uhlenbeck Process
Multivariate Nonhomogeneous Ornstein-Uhlenbeck Proscess
Ito’s Integral

description: Κεντρικό θέμα της εργασίας είναι η μη ομογενής ως προς τον χρόνο διαδικασία Ornstein-Uhlenbeck. Αρχικά, παρουσιάζονται η κίνηση Brown και κάποιες βασικές ιδιότητές της. Στη συνέχεια, κατασκευάζεται το στοχαστικό ολοκλήρωμα του Ito πάνω στην κίνηση Brown και διατυπώνονται ο τύπος του Ito, το θεώρημα αναπαράστασης Martingale και το θεώρημα αλλαγής μέτρου πιθανότητας Girsanov, ενώ παρατίθεται και εναλλακτικός τρόπος ορισμού του στοχαστικού ολοκληρώματος με το ολοκλήρωμα Stratonovich. Εφόσον αναπτύχθηκε η απαραίτητη θεωρία, ορίζεται η στοχαστική διαφορική εξίσωση της μη ομογενούς διαδικασίας Ornstein-Uhlenbeck για μία ή περισσότερες διαστάσεις και δίδονται για την μονοδιάστατη περίπτωση η συνάρτηση πυκνότητας πιθανότητας, η μέθοδος για την εκτίμηση παραμέτρων με μία εφαρμογή της σε δεδομένα, και κάποιες βασικές ιδιότητες της διαδικασίας, όπως της επιστροφής στην μέση τιμή. Τέλος, παρουσιάζεται η μέθοδος διακριτοποίησης Euler για την προσομοίωση της διαδικασίας και μία εφαρμογή με αποσβενύμενες ημιτονοειδείς συναρτήσεις
description: The main subject of this thesis is the time nonhomogeneous Ornstein-Uhlenbeck process. Firstly, the Brownian motion and some main properties of it are presented. Then, Ito’s stochastic integral is constructed with respect to Brownian motion and Ito’s formula, Martingale representation theorem and the change of measure Girsanov are stated, while an alternative way to define the stochastic integral with the Stratonovich integral is described. Since the necessary theory is built, the stochastic differential equation of the nonhomogeneous Ornstein-Uhlenbeck process for one or many dimensions is defined. Alsο for the one dimension case the probability density function, the parameter estimation method with an application of it in data and some main properties of the process, such as the mean reversion property, are presented. Finally, the discretization Euler method for the simulation of the process and an application with damped sine functions are demonstrated
Book Reviews
Creators: name: Dickason, Olive Patricia
name: Proulx, Paul
name: Leroy, Carol
Publisher: name: Canadian Journal of Native Education
Year: 2021

description: Exemplar of Liberty: Native America and the Evolution of Democracy. ByDonald A. Grinde, Jrv and Bruce E. Johansen. Los Angeles: American Indian Studies Center, University of California, 1991. Blackfoot Grammar. By Donald G. Frantz. Toronto: University of Toronto Press, 1991 (hardcover, $45). The Circle Program (Fitzhenry & Whiteside)
description: Canadian Journal of Native Education, Vol. 19 No. 1 (1992)
Η έννοια της ελευθερίας στην Ασκητική του Νίκου Καζαντζάκη
Creators: name: Αλεξίου, Ελευθερία Σωτηρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: ελευθερία
Καζαντζάκης
Ασκητική
freedom
Kazantzakis
Askitiki

description: Με την παρούσα εργασία γίνεται μια προσπάθεια ανάλυσης του έργου του Νίκου Καζαντζάκη Ασκητική με βάση την ερμηνεία της έννοιας της ελευθερίας. Πριν την ερμηνεία της ελευθερίας στην Ασκητική γίνεται μια μικρή αναφορά στη ζωή του Νίκου Καζαντζάκη, στην ιδιαίτερη χρήση της γλώσσας στα έργα του αλλά και στο ρόλο της φιλοσοφίας τόσο στη ζωή του όσο και στο συγγραφικό του έργο. Στη συνέχεια της εργασίας αναλύεται το έργο της Ασκητικής σύμφωνα με τα κεφάλαια που χρησιμοποιεί και ο ίδιος ο συγγραφέας. Τέλος, γίνεται μια γενική αναφορά στην έννοια της ελευθερίας στο συνολικό έργο του Νίκου Καζαντζάκη και έπειτα γίνεται η ειδική αναφορά της ελευθερίας στο έργο της Ασκητικής. Η ελευθερία αποτελεί ένα από τα βασικά ερωτήματα της φιλοσοφικής σκέψης και για τον Καζαντζάκη η κατάκτησή της γίνεται με κοπιαστικό αγώνα που δεν σταματάει ποτέ στη ζωή του ανθρώπου
description: The aim of the present thesis was the study of the literary work of Nikos Kazantzakis “Askitiki” with our focus facing the meaning of freedom. The paper starts with a biography of Nikos Kazantzakis, then is made a reference at the idiosyncratic language of the writer and also a mention at the role of philosophy both in life and in the work of Nikos Kazantzakis. Furthermore “Askitiki” is analyzed according to the chapters of the book. The meaning of freedom is separated in two parts. At the begging there is a general mention at the total work of the author and then at the work of “Askitiki”. Freedom is one of the main subjects of philosophy and for Kazantzakis you need to try hard and constantly in order to conquest it
Feasibility Study of Microsecond Pulsed Microwave Ablation using a Minimally Invasive Antenna
Creators: name: Evans, Audrey L.
name: Sawicki, James F.
name: Luyen, Hung
name: Mohtashami, Yahya
name: Behdad, Nader
name: Hagness, Susan C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Medical Physics (physics.med-ph)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: In this study we established the feasibility of producing localized ablation zones using microsecond pulsed microwave ablation (MWA) as an alternative to conventional continuous wave (CW) MWA. We verified that a thin floating-sleeve dipole ablation probe can withstand pulsed power delivery with peak powers as high as 25 kW, with pulse widths on the order of 1 us. We conducted MWA experiments in egg white using CW and pulsed modes of operation and found that ablation zones achieved via pulsed MWA are comparable in dimension to those created via CW MWA when the average power and procedure duration are equivalent. Finally, we performed pulsed MWA experiments in bovine liver and confirmed that pulsed MWA consistently produces large, localized ablation zones and temperatures that exceed 100°C. Establishing the feasibility of pulsed MWA opens the opportunity for developing a coupled MWA treatment and imaging system using pulsed MWA and microwave-induced thermoacoustic signals for real-time monitoring of MWA.
Mixed strong$-$electroweak corrections to the Drell$-$Yan process
Creators: name: Bonciani, Roberto
name: Buonocore, Luca
name: Grazzini, Massimiliano
name: Kallweit, Stefan
name: Rana, Narayan
name: Tramontano, Francesco
name: Vicini, Alessandro
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report on the first complete computation of the mixed QCD$-$electroweak (EW) corrections to the neutral-current Drell$-$Yan process. Superseding previously applied approximations, our calculation provides the first result at this order that is valid in the entire range of dilepton invariant masses. The two-loop virtual contribution is computed by using semi-analytical techniques, overcoming the technical problems in the evaluation of the relevant master integrals. The cancellation of soft and collinear singularities is achieved by a formulation of the $q_T$ subtraction formalism valid in presence of charged massive particles in the final state. We present numerical results for the fiducial cross section and selected kinematical distributions. At large values of the lepton $p_T$ the mixed QCD$-$EW corrections are negative and increase in size, to about $-15\%$ with respect to the next-to-leading-order QCD result at $p_T=500\,$GeV. Up to dilepton invariant masses of 1 TeV the computed corrections amount to about $-1.5\%$ with respect to the next-to-leading-order QCD result.
description: 8 pages, 2 figures and 1 table
A Flare of AE Aquarii Observed with XMM-Newton
Creators: name: Choi, Chul-Sung
name: Dotani, Tadayasu
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of analyzing the XMM-Newton data obtained in 2001 November 7 - 8. A flare is observed simultaneously in X-ray and UV together with a quiescence. We find that during the flare event X-ray flux varies with UV with no significant time lag, indicating a close correlation of flux variation for X-ray and UV flares. An upper limit of the lag is estimated to be \~1 min. From a timing analysis for X-ray data, we find that both pulsed and unpulsed flux increase clearly as the flare advances in the entire energy band 0.15 - 10 keV. The net increase of pulsed flux to the quiescence is, however, small and corresponds to about 3 - 4% of the increase in unpulsed flux, confirming that a flux variation of flare in AE Aqr is dominated by unpulsed X-rays. A spectral analysis reveals that the energy spectrum is similar to that of the quiescence at the beginning of the flare, but the spectrum becomes harder as the flare advances. Based on these results, we discuss the current issues that need to be clarified, e.g., the possible flaring site and the mass accretion problem of the white dwarf. We also discuss the flare properties obtained in this study.
description: 15 pages, 3 tables, 9 figures, accepted for publication in ApJ
Near threshold heavy vector meson photoproduction at LHC and EicC
Creators: name: Xie, Ya-Ping
name: Goncalves, Victor P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The exclusive $J/Ψ$ and $Υ$ photoproduction in fixed - target collisions at the LHC and $ep(A)$ collisions at the Electron ion collider in China (EicC) is investigated considering different models for the treatment of the vector meson production at low energies, close to the threshold. Results for the total cross sections and associated distributions are presented. We predict a large number of $J/Ψ$ events at the LHC in the rapidity range covered by the LHCb detector. For the EicC, our predictions point out that a detailed analysis of the near threshold $J/Ψ$ and $Υ$ photoproduction is feasible. Moreover, our results indicate that the modeling of the near threshold vector meson production can be constrained by future experimental analyzes at the LHC and EicC.
description: 15 pages, 4 figures, 2 tables. Version published in EPJC
Re-examining Bogoliubov's theory of an interacting Bose gas
Creators: name: Ettouhami, A. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: As is well-known, in the conventional formulation of Bogoliubov's theory of an interacting Bose gas, the Hamiltonian $\hat{H}$ is written as a decoupled sum of contributions from different momenta of the form $\hat{H} = \sum_{k\neq 0}\hat{H}_{k}$. Then, each of the single-mode Hamiltonians $\hat{H}_{k}$ is diagonalized separately, and the resulting ground state wavefunction of the total Hamiltonian $\hat{H}$ is written as a simple product of the ground state wavefunctions of each of the single-mode Hamiltonians $\hat{H}_{k}$. We argue that, from a number-conserving perspective, this diagonalization method may not be adequate since the true Hilbert spaces where the Hamiltonians ${\hat{H}_{k}}$ should be diagonalized all have the ${k}=0$ state in common, and hence the ground state wavefunction of the total Hamiltonian $\hat{H}$ may {not} be written as a simple product of the ground state wavefunctions of the $\hat{H}_{k}$'s. In this paper, we give a thorough review of Bogoliubov's method, and discuss a variational and number-conserving formulation of this theory in which the ${k}=0$ state is restored to the Hilbert space of the interacting gas, and where, instead of diagonalizing the Hamiltonians $\hat{H}_{k}$ separately, we diagonalize the total Hamiltonian $\hat{H}$ as a whole. When this is done, we find that the ground state energy is lowered below the Bogoliubov result, and the depletion of bosons is significantly reduced with respect to the one obtained in the number non-conserving treatment. We also find that the spectrum of the usual $α_{k}$ excitations of Bogoliubov's method changes from a gapless one, as predicted by the standard, number non-conserving formulation of this theory, to one which exhibits a finite gap in the $k\to 0$ limit.
description: Published version, 81 pages, 16 figures
New cytotoxic natural products from North-Eastern Pacific marine invertebrates
Creators: name: Pika, Jana
Publisher: name: University of British Columbia
Year: 2008

description: An investigation into the chemistry of four species of marine invertebrates which were found to produce cytotoxic crude extracts (ED50 against the L1210 murine leukemia cell line 5 30 pg/mL) led to the isolation of nine new and eleven previously known secondary metabolites. The structures of the novel compounds were elucidated by a combination of spectroscopic analysis and chemical interconversion. The metabolites were tested against the in vitro L1210 murine leukemia, the drug-sensitive MCF-7, or the drug-resistant MCF-7 Adr breast cancer cell lines. Investigation of the cytotoxic extracts of the marine sponge Aplysilla glacialis led to the identification of the novel 9, 11-secosteroids glaciasterol A (100) and glaciasterol B (101). These compounds are the first examples of secosteroids isolated from a sponge of the genus Aplysilla. Glaciasterol A (100) proved active in vitro against theMCF-7 human breast cancer cell line at an ED50 of 19 pg/mL. The ED50 for Glaciasterol A (100) against the drug-resistant MCF-7 Adr breast cancer cell line was 18 tig/mL. The structures of the glaciasterols were determined by aseries of chemical interconversions in addition to extensive analysis of spectroscopic data. Glaciasterol B diacetate (107) was one of the derivatives synthesized and it proved to be the most active in the cytotoxicity assays.Glaciasterol B diacetate was active against both the MCF-7 and the drug-resistant MCF-7 Adr cell lines with ED50values of 1.8 pg/mL. A study of the metabolites of a gray-white sponge collected off the coast of Vancouver Island yielded the new cytotoxic secosteroid blancasterol (102). Blancasterol (102) was found to be active against the MCF-7 and drug-resistant MCF-7 Adr breast cancer cell lines with ED50 values of 3 g.ig/mL and 10.6 pg/mL, respectively. The new sesquiterpenes 0-methyl 9-oxofurodysinin lactone (72), 2-oxomicrocionin-2 lactone (73), 0-methyl2-oxomicrocionin-2 lactone (74) as well as seven previously reported sesquiterpenes (35, 36, 56, 57, 41, 43, and 44)were also isolated from the sponge extract. An understanding of the secondary metabolism of the invertebrate was useful in identifying the sponge as a Pleraplysilla species, the first found off the west coast of North America. Langarin (142) proved to be the cytotoxic component of the extract of an undescribed species of Aplidium, a compound tunicate found in the waters off the Queen Charlotte Islands. Langarin (142) was active in vitro againstL1210 murine leukemia cells with an ED50 of 0.44g/mL. Examination of extracts of the colonial tunicate Aplidium californicum resulted in the isolation of two new prenylated hydroquinone derivatives (160 and 161) as well as the known compounds 149, 150, 152, and 158. Compound 152 was tested in vitro against the L1210 murine leukemia cell line and found to be cytotoxic with anED50 value of 3.9 pg/mL.
BY-COVID D7.2 - Report on industry value of infectious disease data
Creators: name: Sousoni, Despoina
name: Balsyte, Erika
name: Harrison, Elaine
name: Bäckman, Ulrika
name: Smith, Andrew
Publisher: name: Zenodo
Year: 2024
Subjects: BY-COVID
industry value
infectious disease data
COVID-19 data portal

description: The value of open data in innovation is very difficult to quantify, as academic research often takes many years before it reaches its full potential of becoming an invention and being produced at an industrial scale. The efforts of the public and private sectors during the COVID-19 pandemic allowed for the rapid discovery of vaccines and other products. For this study, we used quantitative (number of patents and publications) and qualitative (interviews) data to understand the impact of COVID-19 open resources on the operations of the private sector. More than 1,000 patents reference at least one of the COVID-19 Data Portal resources, and 30% of these are affiliated with a for-profit company, showcasing the importance and successful integration of open resources in the industry sector. The study also examined the most cited patents affiliated with industry, as well as identified scientific publications that reference the COVID-19 Data Portal, confirming the awareness of the open resource not only by the public sector but also by industry. Lastly, interviews were conducted to understand the impact of the pandemic on the business operations of seven life science companies, high adaptability and further usage of COVID-related products and services beyond the pandemic. Additionally, ten interviews were conducted with Research Infrastructures, highlighting the importance of time, cost, and efficiency of infrastructures’ adaptability to ensure proper industry engagement during crisis calls. Overall, this study provides evidence of the importance of open data and services during the pandemic and underscores the need for preparedness, bridging the gap between public and private sectors, and continuously assessing the impact of infrastructures on innovation.