cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Αναβάθμιση τοπίου υδατορευμάτων και διαχείριση αυτών.
Creators: name: Μαρματάκη, Ζωή Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Αναβάθμιση υδατορευμάτων
Διευθέτηση υδατορευμάτων
Watercourses upgrading
Watercourses arrangement
Landscape architecture

description: Η παρούσα μελέτη αρχικά, πραγματεύεται την παρουσίαση και την ανάλυση μεθόδων δια μέσου των οποίων επιτυγχάνεται η σωστή διαχείριση και η διευθέτηση ενός υδατορεύματος. Αναλύονται τόσο τα τεχνητά όσο και τα φυτοτεχνικά έργα διευθέτησης και δίνεται έμφαση σε εκείνα που από πλευρά κατασκευής είναι φιλικά απέναντι στο περιβάλλον (π.χ. καστορογενή φράγματα). Αποσκοπούν στη διαχείριση των ρεόντων υδάτων (ποιοτικά, ποσοτικά), στη μείωση των φαινομένων πλημμύρας και διάβρωσης, στον εμπλουτισμό των υπογείων υδάτων και στη δημιουργία ενός ποτάμιου οικοσυστήματος με πλούσια χλωρίδα και πανίδα. Ο Γαλλικός ή Εχέδωρος ποταμός πηγάζει από το όρος Κρούσια του νομού Κιλκίς και εκβάλλει στο Θερμαϊκό κόλπο δυτικά του Καλοχωρίου. Αποτελεί έναν ποταμό με περιοδική ροή και με συχνή εμφάνιση πλημμυρικών φαινομένων. Σήμερα, αυτός ο υγρότοπος έχει υποβαθμιστεί κυρίως από την έντονη χρησιμοποίηση των υπογείων υδάτων, την αστικοποίηση και τη ρύπανση της κοίτης με στερεά και υγρά απόβλητα. Μέσω της παρούσας μελέτης λοιπόν, παρατίθενται προτάσεις μέσω των οποίων αυτός ο υγρότοπος αναδεικνύεται οικολογικά, οικονομικά και πολιτιστικά.
description: First of all, this master thesis deals with the presentation and the analysis of methods through which is achieved the proper management and settlement of a stream or river. Analyzed both the artificial and the natural projects of settlement emphasized on those which are friendly to the environment (e.g. beaver dams). Aim to manage the downstream flow (qualitative & quantitative), to reduce the flood picks and the erosion, to recharge the underground water and to create also, a river ecosystem with various species of flora and fauna. Gallikos or Echedoros River has its springs in the mountain Krousia of the Kilkis prefecture and it flows into Thermaikos gulf west of Kalochori village. It is a river with a periodic flow and frequent occurrence of floods. Today, this wetland has been deteriorated due to exhausting exploitation of underground water, the urbanization and its pollution with various solid and liquid wastes. Therefore, through this study set out proposals through which this wetland is designated ecologically, economically and culturally.
The dissipation of toroidal magnetic fields and spin-down evolution of young and strongly magnetized pulsars
Creators: name: Gao, Zhi-Fu
name: Shan, Hao
name: Wang, Hui
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Magnetars are a kind of pulsars powered mainly by superhigh magnetic fields. They are popular sources with many unsolved issues in themselves, but also linked to various high energy phenomena, such as QPOs, giant flares, fast radio bursts and super-luminous supernovae. In this work, we first review our recent works on the dissipation of toroidal magnetic fields in magnetars and rotationally powered pulsars, then review the spin-down evolution of young and strongly magnetized pulsars, especially of magnetars. We present an interesting and important relation between the magnetization parameter, and magnetic field in the magnetar crust. Finally, we introduce our two works in progress: to explain the magnetar "anti-gltich" events in the thermal plastic flow model and to revisit the expression of braking index $n$, which is independent of the second derivative of spin frequency of a pulsar and give some proposals for our future work.
description: 11pages,3figures
$B^0_{s(d)} - \bar{B}^0_{s(d)} $ mixing and new physics effects in a top quark two-Higgs doublet model
Creators: name: Lü, Lin-xia
name: Xiao, Zhen-jun
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the new physics contributions to the neutral $B_d^0$ and $B_s^0$ meson mass splitting $ΔM_d$ and $ΔM_s$ induced by the box diagrams involving the charged-Higgs bosons in the top quark two-Higgs doublet model (T2HDM). Using the precision data, we obtain the bounds on the parameter space of the T2HDM: (a) for fixed $M_H=400$ GeV and $δ=[0^\circ,60^\circ]$, the upper bound on $\tanβ$ is $\tan β\leq 30$ after the inclusion of major theoretical uncertainties; (b) for the case of $\tanβ \leq 20$, a light charged Higgs boson with a mass around 300 GeV is allowed; and (c) the bounds on $\tanβ$ and $M_H$ are strongly correlated: a smaller (larger) $\tanβ$ means a lighter (heavier) charged Higgs boson.
description: 11 pages, 2 EPS figures, RevTex, new references added
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Va sans Peur
Creators: name: Mahaud, Morgane
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: This report aim to understand better what happened to the Va sans Peur on St-Patrick causeway at the end of march 1948.
Investigation of Effects of New Physics in $c\to (s,d)\ell^+ν_\ell$ Transitions
Creators: name: Leng, Xue
name: Mu, Xiao-Long
name: Zou, Zhi-Tian
name: Li, Ying
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Recent anomalies in decays induced by $b\to c \ell^- \barν_\ell$ transitions raise the question about such phenomena in the $D$ decays induced by $c\to (s,d)\ell^+ν_\ell$ transitions. In the experimental side, current measurements on the pure leptonic and semileptonic $D$ decays agree with the standard model predictions, such agreements can be used to constrain the new physics (NP) contributions. In this work, we extend the standard model by assuming general effective Hamiltonians describing the $c\to (s,d)\ell^+ν_\ell$ transitions including the full set of the four-fermion operators. Within the latest experimental data, we perform a minimum $χ^2$ fit of the Wilson coefficient corresponding to each operator. The results show that the Wilson coefficients of scalar operators in muon sector are at the order of ${\cal O}(10^{-2})$, and others are at the order of ${\cal O}(10^{-3})$. The lepton flavor universality could be violated by the scalar operators. We also calculate the branching fractions, the forward-backward asymmetries and polarizations of final vector mesons and leptons with the fitted Wilson coefficients of scalar and tensor operators. It is found that the pure leptonic decays are very sensitive to the scalar operators. The effects of NP on the semileptonic decays with electron are negligible, while for the semileptonic decays with muon the effects of scalar operators will show up in the forward-backward asymmetries and polarizations of muon of $D \to Pμ^+ ν_μ$. The future measurements in BESIII and Belle II experiments will help us to test effects of NP and to further test new physics models.
description: 28 Pages,9 figures
Probing the Unknown: Exploring Student Interactions with Probeable Problems at Scale in Introductory Programming
Creators: name: Denny, Paul
name: Kumar, Viraj
name: MacNeil, Stephen
name: Prather, James
name: Leinonen, Juho
Publisher: name: arXiv
Year: 2025
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Introductory programming courses often rely on small code-writing exercises that have clearly specified problem statements. This limits opportunities for students to practice how to clarify ambiguous requirements -- a critical skill in real-world programming. In addition, the emerging capabilities of large language models (LLMs) to produce code from well-defined specifications may harm student engagement with traditional programming exercises. This study explores the use of ``Probeable Problems'', automatically gradable tasks that have deliberately vague or incomplete specifications. Such problems require students to submit test inputs, or `probes', to clarify requirements before implementation. Through analysis of over 40,000 probes in an introductory course, we identify patterns linking probing behaviors to task success. Systematic strategies, such as thoroughly exploring expected behavior before coding, resulted in fewer incorrect code submissions and correlated with course success. Feedback from nearly 1,000 participants highlighted the challenges and real-world relevance of these tasks, as well as benefits to critical thinking and metacognitive skills. Probeable Problems are easy to set up and deploy at scale, and help students recognize and resolve uncertainties in programming problems.
description: Accepted at ITiCSE 2025
Possible Indications of New Physics in Bd-mixing and in sin(2 beta) Determinations
Creators: name: Lunghi, Enrico
name: Soni, Amarjit
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Using the hadronic matrix elements from the lattice, B_K and xi_s, involving only the 4-quark operators for Delta flavor (F) = 2 Hamiltonian relevant for K, B_d and B_s mixing, along with V_cb, we deduce a non-trivial constraint on the SM, sin (2 beta) = 0.87+-0.09. This deviates from direct experimental measurements via the tree process, b -> c c s as well as the one via the penguin-loop b -> s decays by around 2.1 and 2.7 sigma respectively. If these deviations are confirmed they would imply the presence of new physics rather pervasively in both B_d mixing (i.e. very likely in b -> d) as well as in b -> s transitions requiring a beyond the SM CP-odd phase. Consequently, improvements in the relevant lattice calculations should be given a high priority.
description: 4 pages, 2 eps figures. References added. A corrected expression for epsilon_K, following the paper from Buras and Guadagnoli (arXiv:0805.3887), is used and small changes in the numerics due to the new formula are propagated
Ενεργός Πολίτης» : Δημιουργία χαρτογραφικής διαδικτυακής εφαρμογής με πληθοποριστικό (crowdsourcing) χαρακτήρα.
Creators: name: Παπακωνσταντίνου, Βασίλης Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Πληθοπορισμός
Διαδίκτυο
Χωρικά δεδομένα
Crowdscourcing
Internet
Spatial data

description: Η παρούσα εργασία πραγματεύεται, τις νέες τάσεις στην διαδικτυακή χαρτογραφία, το πως αυτές διαμορφώθηκαν καθώς και τις μελλοντικές προοπτικές της και προχωράει στο τελευταίο κεφάλαιο, στην ανάπτυξη μιας πληθοποριστικής χαρτογραφικής εφαρμογής. Το πρώτο κεφάλαιο, περιλαμβάνει την παρουσίαση της χαρτογραφίας στο διαδίκτυο, στο δεύτερο κεφάλαιο της εργασίας, πραγματεύεται η έννοια του πληθοπορισμού και της συμμετοχικότητας στην δημιουργία της γνώσης στο ίντερνετ ενώ τέλος το τρίτο κεφάλαιο, έχει σαν σκοπό την παρουσίαση μιας χαρτογραφικής διαδικτυακής εφαρμογής πληθοποριστικού χαρακτήρα που δημιουργήθηκε για τις ανάγκες της εργασίας μέσω του συστήματος διαχείρισης περιεχομένου Drupal 7.0.
description: This paper deals with the new trends in web-based cartography, how they have been formed and their future prospects, as well as the development of a crowd-sourced cartographic application. The first chapter contains a presentation of how cartography in the internet works, the second chapter of this paper focuses on crowd-sourcing and interactivity in creating knowledge on the internet, finally the third and final chapter demonstrates the crowd-sourced cartographic web app that was created for the needs of the present paper with the use of Drupal 7.0 content management system.
Η σημασία διάγνωσης της εξάρτησης στο νόμο περι ναρκωτικών ουσιών
Creators: name: Τζένος, Αλέξανδρος Ιάκωβος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Ποινικό Δικαιο
Ειδικοί Ποινικοί Νόμοι
Νομος περι Ναρκωτικών
Criminal Law
Criminal Legislation
Drug Legislation

description: Ο καταλογισμός ως στοιχείο της έννοιας του εγκλήματος, όπως αυτό τυποποιείται στο άρθρο 14 ΠΚ βρίσκεται στο θεωρητικό πυρήνα της μελέτης σε συνάρτηση με την διαγνωση της εξάρτησης στη νομοθεσια περι ναρκωτικών. Στην ανεύρεσης του αξιόποινου σε περιπτώσεις εξαρτημένων δραστών η διαδικασία αυτή καθορίζεται θεμελιακά απ’ το στοιχείο διάγνωσης της εξάρτησης. Παρουσιάζεται η έννοια της εξάρτησης στην διεπιστημονική της διάσταση και καθορίζεται η νομική της φύσης. Αναλύεται η διαφοροποίηση της ποινικής μεταχείρησης των εξαρτημένων δραστών. Εντοπίζεται η σχέση της εξάρτησης με τον καταλογισμό στο φάσμα της ποινικής διαδικασίας και καταδεικνύεται η σημασία της διάγνωσης της εξάρτησης ως κλειδί απεγκληματικής και θεραπευτικής πολιτικής και παρουσιάζεται το σύστημα διάγνωσης της εξάρτησης στον Νόμο 4139/2013.
description: Guilt as an element of crime, as it is formulated in Article 14 of Penal Law is the theoretical core of the study in relation to the diagnosis of addiction in Drug legislation. The penalization of a drug related crime is fundamentally determined by the element of addiction. Defined here, the concept of addiction in interdisciplinary dimension and its legal nature. Analyzing the differentiation of criminal treatment of addicted offenders. Addressing the relationship of addiction by charging the scope of the criminal proceedings and demonstrating the importance of the diagnosis of addiction as key against crime and therapeutic policies. Finally a representation of the diagnostic system of addiction in the Drug Act 4139/2013.
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Venus
Creators: name: Perks, Graeme
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The Venus was a brig about which little is known. The Venus made one recorded voyage from Wiscassett, Maine, USA and others to the Mediterranean returning to Liverpool. Venus was driven ashore in France in 1811 but not detained despite Britain and France being at war, so she may have been an American vessel as the masters name was Scott. The Venus was wrecked near Aberdovey in December 1811 having been driven ashore in a gale but her crew and cargo were saved.
ZAMONAVIY ISPAN TILIDA ASOSIY GAPLAR SEMANTIKASI VA PRAGMATIKASINING TAHLILI
Creators: name: Oltiyev Temir Jonimboyevich, f.f.n., dotsent, O'zbekiston davlat jahon tillari universiteti
Publisher: name: Zenodo
Year: 2024

description: Данная аннотация обзорно представляет актуальные методы исследования семантики в лингвистике с акцентом на когнитивно-психологических аспектах. Текст подчеркивает важность вопроса о значении в семантических теориях и его определение в рамках когнитивной науки. Автор выделяет два основных подхода к анализу значения, один из которых сосредотачивается на словарной позиции и дедуктивных методах, а другой ориентируется на контекстуально зависимые значения.

Ключевые слова: семантика, когнитивно-психологические аспекты, значение, контекст, словарная позиция, контекстуальность.
ETL Abinitio Performance Tuning Guidelines
Creators: name: Martha, Ranjith
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 460501
subject: Data engineering and data science

description: Abinitio is one of the Legacy ETL (Extraction Transformation and Loading) Tool used for Data Transformation, Data Migration, Data Enrichment and Data Validation as part of Enterprise Data Warehouse. The purpose of this document is to provide a framework and guidelines to be followed for effective and Optimized Design of ETL Abinitio. This journal covers all the Performance Tuning considerations and coding standards of ETL Abinitio are outlined.
Hydrogen dynamics and light-induced structural changes in hydrogenated amorphous silicon
Creators: name: Abtew, T. A.
name: Drabold, D. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We use accurate first principles methods to study the network dynamics of hydrogenated amorphous silicon, including the motion of hydrogen. In addition to studies of atomic dynamics in the electronic ground state, we also adopt a simple procedure to track the H dynamics in light-excited states. Consistent with recent experiments and computer simulations, we find that dihydride structures are formed for dynamics in the light-excited states, and we give explicit examples of pathways to these states. Our simulations appear to be consistent with aspects of the Staebler-Wronski effect, such as the light-induced creation of well separated dangling bonds.
description: 9 pages, 8 figures, submitted to PRB
Η επιρροή του φαινομένου της αλληλεπίδρασης εδάφους – θεμελίωσης – κατασκευής σε κατασκευές πυρηνικών αντιδραστήρων, λαμβάνοντας υπόψη γεωμετρικά μη-γραμμικά φαινόμενα έδρασης
Creators: name: Αθανασίου, Αλέξανδρος Θωμά
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Κατασκευές πυρηνικών αντιδραστήρων
Αλληλεπίδραση εδάφους – κατασκευής
Γεωμετρική μη-γραμμικότητα
Nuclear containment structures
Soil-Structure Interaction
Geometric nonlinearity

description: Οι σύγχρονοι αντισεισμικοί κανονισμοί λαμβάνουν υπόψη στο σχεδιασμό μιας κατασκευής πυρηνικού αντιδραστήρα την εμφάνιση εξαιρετικά σπάνιων και συνάμα καταστροφικών σεισμικών σεναρίων, με στόχο την προστασία του εσωτερικού εξοπλισμού του. Ωστόσο, αμελείται η πιθανή αλληλεπίδραση της κατασκευής με το υποκείμενο έδαφος, η οποία μπορεί να προκαλέσει γεωμετρικά μη-γραμμικά φαινόμενα (ολίσθηση ή/και λικνισμό), τα οποία μπορούν να αποτελέσουν κρίσιμο παράγοντα για την ασφάλεια των εσωτερικών συστημάτων του αντιδραστήρα. Στην παρούσα εργασία, μελετάται η επιρροή του φαινομένου της αλληλεπίδρασης εδάφους-θεμελίωσης-κατασκευής, σε τέτοιες κατασκευές. Αρχικά για γραμμική ανάλυση, δημιουργείται ένα αξιόπιστο μοντέλο προσομοίωσης του συνολικού συστήματος και στη συνέχεια εισάγονται νόμοι διεπιφάνειας, οι οποίοι εκφράζουν την πιθανότητα εμφάνισης γεωμετρικά μη-γραμμικών φαινομένων μεταξύ εδάφους και κατασκευής. Με αυτόν τον τρόπο, γίνεται μια πλήρης μη-γραμμική ανάλυση του συστήματος για τον συνυπολογισμό όλων των παραγόντων που ενδέχεται να δημιουργήσουν κρίσιμες καταστάσεις στα εσωτερικά συστήματα της κατασκευής του αντιδραστήρα, ακόμα και για μικρότερης έντασης σεισμούς από αυτούς που προτείνονται στους αντισεισμικούς κανονισμούς.
description: Current earthquake design codes are taking into account extremely rare and intense earthquake events, in order to protect the inner systems of a nuclear containment structure. However, the possible influence of the interaction between the structure and the soil is neglected, which can provoke geometrically nonlinear effects (sliding and/or rocking), that may be crucial for the design of a nuclear containment structure and its inner systems. In this work, the effect of soil-foundation-structure interaction on such structures is studied. At first, through linear analyses, a reliable model for the whole system is created. Next, interaction properties between the soil and structure are placed, which account for the onset of geometrically nonlinear phenomena. In this way, a complete nonlinear analysis is held, considering all the possible parameters that may be critical for the safety of the inner equipment of the structure, even for less intense earthquakes, than those proposed by the codes.
Arbitrary Polarization-Independent Backscattering or Reflection by Rotationally-Symmetric Reciprocal Structures
Creators: name: Chen, Weijin
name: Yang, Qingdong
name: Chen, Yuntian
name: Liu, Wei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study the backward scatterings of plane waves by reciprocal scatterers and reveal that $n$-fold ($n\geq3$) rotation symmetry is sufficient to secure invariant backscattering for arbitrarily-polarized incident plane waves. It is further demonstrated that the same principle is also applicable for infinite periodic structures in terms of reflection, which simultaneously guarantees the transmission invariance if there are neither Ohmic losses nor extra diffraction channels. At the presence of losses, extra reflection symmetries (with reflection planes either parallel or perpendicular to the incident direction) can be incorporated to ensure simultaneously the invariance of transmission and absorption. The principles we have revealed are protected by fundamental laws of reciprocity and parity conservation, which are fully independent of the optical or geometric parameters of the photonic structures. The optical invariance obtained is intrinsically robust against perturbations that preserve reciprocity and the geometric symmetries, which could be widely employed for photonic applications that require stable backscatterings or reflections.
description: Arbitrary Polarizations; Backscattering Invariance; Rotation Symmetry; Reciprocity
Long-range-correlated disorder in graphene
Creators: name: Khveshchenko, D. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study transport of two-dimensional quasi-relativistic electronic excitations in graphene in the presence of static long-range-correlated random scalar and vector potentials. Using a combination of perturbation theory and path-integral techniques, we estimate scattering rates which control Drude conductivity, magneto-transport, and Friedel oscillations in the ballistic regime of large quasiparticle energies. We also discuss properties of zero-energy states and pertinent localization scenarios.
description: 4 pages, Latex, no figures
Crosstalk between nanotube devices: contact and channel effects
Creators: name: Leonard, Francois
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: At reduced dimensionality, Coulomb interactions play a crucial role in determining device properties. While such interactions within the same carbon nanotube have been shown to have unexpected properties, device integration and multi-nanotube devices require the consideration of inter-nanotube interactions. We present calculations of the characteristics of planar carbon nanotube transistors including interactions between semiconducting nanotubes and between semiconducting and metallic nanotubes. The results indicate that inter-tube interactions affect both the channel behavior and the contacts. For long channel devices, a separation of the order of the gate oxide thickness is necessary to eliminate inter-nanotube effects. Because of an exponential dependence of this length scale on dielectric constant, very high device densities are possible by using high-k dielectrics and embedded contacts.
A study of the language of requests made on the telephone by native English speakers, Japanese speakers, and Japanese ESL speakers
Creators: name: Haisa, Akihiko
Publisher: name: University of British Columbia
Year: 2009

description: In this study, the language of requests made on the telephone by native English speakers, Japanese speakers, and Japanese ESL speakers was compared and analyzed in two tasks. Each group consisted of 20 subjects who were involved in an oral role play to elicit conversational data. Politeness, influence of situational variables on language use, and pragmatic transfer were analyzed in openings, requests, thankings, and closings. Japanese ESL speakers preferred to use preparatory expressions such as, "Could (Would) you ...?" or direct expressions such as, "I want you to ...?", while native English speakers tended to use more indirect expressions such as, "I was wondering or, "I'm hoping that you would...". Japanese ESL speakers also transferred their LI sensitivity to social status variables to their L2 usage. They did not use greetings such as, "Hi", "How are you?", or enthusiastic expressions such as, "Great" and "Wonderful", which were preferred by native English speakers. Pragmatic transfer was analyzed in their interlanguage. Finally, implications for teaching English for communication were presented.
Soft elastic constants from phonon spectroscopy in hole-doped Ba$_{1-x}$(K,Na)$_x$Fe$_2$As$_2$ and Sr$_{1-x}Na$_x$Fe$_2$As$_2$
Creators: name: Kauth, M.
name: Rosenkranz, S.
name: Said, A. H.
name: Taddei, K. M.
name: Wolf, Th.
name: Weber, F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report inelastic x-ray scattering measurements of the in-plane polarized transverse acoustic phonon mode propagating along $q\parallel$[100] in various hole-doped compounds belonging to the 122 family of iron-based superconductors. The slope of the dispersion of this phonon mode is proportional to the square root of the shear modulus $C_{66}$ in the $q \rightarrow 0$ limit and, hence, sensitive to the tetragonal-to-orthorhombic structural phase transition occurring in these compounds. In contrast to a recent report for Ba(Fe$_{0.94}$Co$_{0.06}$)$_2$As$_2$ [F. Weber et al., Phys. Rev. B 98, 014516 (2018)], we find qualitative agreement between values of $C_{66}$ deduced from our experiments and those derived from measurements of the Youngs modulus in Ba$_{1-x}$(K,Na)$_x$Fe$_2$As$_2$ at optimal doping. These results provide an upper limit of about 50 Å for the nematic correlation length for the optimally hole-doped compounds. Furthermore, we also studied compounds at lower doping levels exhibiting the orthorhombic magnetic phase, where $C_{66}$ is not accessible by volume probes, as well as the C4 tetragonal magnetic phase.investigated
New highly-anisotropic Rh-based Heusler compound for magnetic recording
Creators: name: He, Yangkun
name: Fecher, Gerhard H.
name: Fu, Chenguang
name: Pan, Yu
name: Manna, Kaustuv
name: Kroder, Johannes
name: Jha, Ajay
name: Wang, Xiao
name: Hu, Zhiwei
name: Agrestini, Stefano
name: Herrero-Martin, Javier
name: Valvidares, Manuel
name: Skourski, Yurii
name: Schnelle, Walter
name: Stamenov, Plamen
name: Borrmann, Horst
name: Tjeng, Liu Hao
name: Schaefer, Rudolf
name: Parkin, S. S. P.
name: Coey, J. M. D.
name: Felser, Claudia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The development of high-density magnetic recording media is limited by the superparamagnetism in very small ferromagnetic crystals. Hard magnetic materials with strong perpendicular anisotropy offer stability and high recording density. To overcome the difficulty of writing media with a large coercivity, heat assisted magnetic recording (HAMR) has been developed, rapidly heating the media to the Curie temperature Tc before writing, followed by rapid cooling. Requirements are a suitable Tc, coupled with anisotropic thermal conductivity and hard magnetic properties. Here we introduce Rh2CoSb as a new hard magnet with potential for thin film magnetic recording. A magnetocrystalline anisotropy of 3.6 MJm-3 is combined with a saturation magnetization of μ0Ms = 0.52 T at 2 K (2.2 MJm-3 and 0.44 T at room-temperature). The magnetic hardness parameter of 3.7 at room temperature is the highest observed for any rare-earth free hard magnet. The anisotropy is related to an unquenched orbital moment of 0.42 μB on Co, which is hybridized with neighbouring Rh atoms with a large spin-orbit interaction. Moreover, the pronounced temperature-dependence of the anisotropy that follows from its Tc of 450 K, together with a high thermal conductivity of 20 Wm-1K-1, makes Rh2CoSb a candidate for development for heat assisted writing with a recording density in excess of 10 Tb/in2.
Quantum Imaging with Incoherent Photons
Creators: name: Thiel, C.
name: Bastin, T.
name: Martin, J.
name: Solano, E.
name: von Zanthier, J.
name: Agarwal, G. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a technique to obtain sub-wavelength resolution in quantum imaging with potentially 100% contrast using incoherent light. Our method requires neither path-entangled number states nor multi-photon absorption. The scheme makes use of N photons spontaneously emitted by N atoms and registered by N detectors. It is shown that for coincident detection at particular detector positions a resolution of λ/ N can be achieved.
description: 4 pages, 3 figures, improved presentation. Accepted in Physical Review Letters
Multiple Potentials of Mean Force from Biased Experiments Along a Single Coordinate
Creators: name: Minh, David D. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: External biasing forces are often applied to enhance sampling in regions of phase space which would otherwise be rarely observed. While the typical goal of these experiments is to calculate the potential of mean force (PMF) along the biasing coordinate, here I present a method to construct PMFs in multiple dimensions and along arbitary alternative degrees of freedom. A protocol for multidimensional PMF reconstruction from nonequilibrium single-molecule pulling experiments is introduced and tested on a series of two dimensional potential surfaces with varying levels of correlation. Reconstruction accuracy and convergence from several methods - this new protocol, equilibrium umbrella sampling, and free diffusion - are compared, and nonequilibrium pulling is found to be the most efficient. To facilitate the use of this method, the source code for this analysis is made freely available.
description: 7 figures
Κινητική Ασυμμετρία σε άτομα με ΔΕΠ-Υ ηλικίας 7-15 ετών
Creators: name: Λαδά, Μαρία-Σταυρούλα Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Πλευρίωση
Προτίμηση χεριού
Εγκεφαλική ασυμμετρία
Laterality
Handedness preference
Dominance

description: Η Διαταραχή Ελλειμματικής Προσοχής – Υπερκινητικότητα χαρακτηρίζεται από έντονη διάσπαση προσοχής, υπερ-δραστηριόποιηση δηλαδή, εμφανίζεται είτε μόνη της, είτε σε συνδυασμό. Πλευρίωση ονομάζεται η κυριαρχία της μιας πλευράς του σώματος (μάτι, χέρι, πόδι και αυτί), η οποία ονομάζεται ενεργητική. Κατά τη διάρκεια της εξέτασης ελέγχεται η ποιότητα εκτέλεσης πράξεων από την αριστερή και δεξιά πλευρά του σώματος. Πολλές ερευνητικές μελέτες έχουν διεξαχθεί σχετικά με την κινητική ασυμμετρία (προτίμηση χεριού) όχι μόνο σε ανθρώπους αλλά και σε άλλους οργανισμούς όπως ζώα, φυτά. Σκοπός της παρούσας μελέτης είναι να διερευνηθεί η κινητική ασυμμετρία παιδιών με ΔΕΠ-Υ, ηλικίας 7 ως 15 ετών. Πιο συγκεκριμένα, η μελέτη αποσκοπεί στην προτίμηση των άνω άκρων – χέρι σε 5παιδιά ηλικίας 7-15 ετών που έχουν διαγνωστεί με ΔΕΠ-Υ ή ΔΕΠ. Οι συμμετέχοντες είναι παιδιά, αγόρια και κορίτσια, σχολικής και εφηβικής ηλικίας, οι οποίοι έχουν διαγνωστεί με ΔΕΠ-Υ ή ΔΕΠ. Η προτίμηση χεριού αξιολογείται με τις 12 κλινικές δοκιμασίες του ερωτηματολογίου των Briggs και Nebes (1975). Στα αποτελέσματα των υποθέσεων δεν παρατηρήθηκαν στατιστικά σημαντικές διαφορές μεταξύ αριστερόχειρων και δεξιόχειρων παιδιών με ΔΕΠ-Υ ή ΔΕΠ. Επίσης, δεν επιβεβαιώνεται ότι η συχνότητα εμφάνισης δεξιόχειρων κοριτσιών και αγοριών αντίστοιχα είναι μεγαλύτερη σε σχέση με τα μη-δεξιόχειρα.
description: Attention-Deficit/Hyperactivity Disorder (ADHD) is characterized by excessive inattention, hyperactivity, and impulsivity, either alone or in combination. Laterality is the dominance of one side of their body (eye, arm, leg and ear), which is called active. During the test, the quality of performing actions is evaluated both from the left and the right side of the body. Many researches have been conducted about the motor asymmetry (hand preference) not only on humans but also in other living beings such as animals and plants. The purpose of this study is to investigate ADHD children’s, motor asymmetry, aged 7 – 15 years old. More specifically the study aims to the handedness preference – dominance of 7 – 15 year old children who have been diagnosed with ADHD. The participants to the study are children, boys and girls, in school age and adolescents, who have been diagnosed with ADHD. Handedness preference is evaluated with 12 clinical trials of the Briggs and Nebes questionnaire (1975). According to the cases results there wasn’t any significant statistical differences among left-handed and right-handed children with ADHD. Additionally it is not confirmed that right-handed boys and girls are more frequent, compared to non right –handed.
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Νηπιαγωγών (Πανεπιστήμιο Δυτικής Μακεδονίας)
Rare event-triggered transitions in aerodynamic bifurcation
Creators: name: Gayout, Ariane
name: Bourgoin, Mickaël
name: Plihon, Nicolas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The transitions between two states of a bistable system are investigated experimentally and analyzed in the framework of rare-event statistics. Considering a disk pendulum swept by a flow in a wind tunnel, bistability between two aerodynamic branches is observed, with spontaneous transitions from one branch to the other. The waiting times before spontaneous transition are distributed following a double-exponential as a function of the control parameter, spanning four orders of magnitude in time, for both transitions. Inspired by a model originally applied to the transition to turbulence, we show that, for the disk pendulum, both transitions are controlled by rare events of the aerodynamic forces acting on the disk which we propose to link in particular to the vortex shedding-induced fluctuations. Beyond the aerodynamic aspects, this work has interesting fundamental outcomes regarding the broad field of rare events in out-of-equilibrium systems.
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the: SS VIC-33
Creators: name: Davies, Gareth J.S.
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: This project is to discover information relating to the history of the SS VIC-33 which ran a drift after losing its propeller near St Patrick's Causeway, North Cardigan Bay. The SS Vic-33 was a small cargo steamship built in 1944 in Northwich, Cheshire by Pimblott. The name VIC means Victualling Inshore Craft and she formed part of a coastal fleet working for the Ministry of War Transport (MOWT) during the final years of WW2. In 1947, SS VIC-33 was bought by Warnock Brothers of Paisley and renamed SS Smeaton. The SS Smeaton worked in Scotland before being sold to Mersey Docks and Harbour Board in 1951 and then to H G Pound of Portsmouth in 1961. The SS Smeaton was scrapped in 1972.
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Victoria of Barum
Creators: name: Perks, Graeme
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The schooner Victoria 60 tons was built by Westacott and Son at Barnstable (Barum) in 1830 and owned by Arter and son of Barnstable. It was engaged in trading between Barnstable, its neighbouring ports and Bristol and South Wales. The Victoria's first master was Richard Hartnoll and in 1839 he was replaced by J. Smith and in 1841 by Thomas Stone. The Victoria made single voyages to the South coast, Liverpool, Ireland, the continent and Spain. In January 1843 the Victoria was caught in a hurricane in North Wales returning from Liverpool and was wrecked on Sarn-y-bwch in Cardigan Bay. The crew of the Victoria were lost, being washed ashore with the cargo and wreck.
Q-chains in the $U(1)$ gauged Friedberg-Lee-Sirlin model
Creators: name: Loiko, Viktor
name: Perapechka, Ilya
name: Shnir, Yakov
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct static axially symmetric multi-Q-ball configurations in the $U(1)$ gauged two-component Fridberg-Lee-Sirlin model a flat spacetime. The solutions represent electromagnetically bounded chains of stationary spinning charged Q-balls placed along the axis of symmetry. We discuss the properties of these configurations and exhibit their domain of existence.
description: 14 pages, 4 figures
HALIMA XUDOYBERDIYEVA‒ SO'Z SEZGISI YUKSAK IJODKOR
Creators: name: Dildora Yunus qizi Yusupova, Buxoro davlat universiteti o'zbek tilshunosligi va jurnalistika kafedrasi o'qituvchisi, filologiya fanlari nomzodi (PhD)
Publisher: name: Zenodo
Year: 2024

description: Halima Xudoyberdiyevaning til ilmidan to‘la xabardor bo‘lgan, badiiy didi, so‘z sezgisi va mahorati yuksak ijodkor ekanligi u yaratgan betakror tasvir, kutilmagan, ohorli badiiy lavhalar, so‘z chaqinlarini paydo qila olishida seziladi. Mazkur maqolada shoiraning ma’nodosh so‘zlardan foydalanish mahorati tahlilga tortilgan.

Tayanch so‘zlar: til va yozuvchi, sinonimiya, matniy sinonimlik
Loss and fractionation of noble gas isotopes and moderately volatile elements from planetary embryos and early Venus, Earth and Mars
Creators: name: Lammer, H.
name: Scherf, M.
name: Kurokawa, H.
name: Ueno, Y.
name: Burger, C.
name: Maindl, T.
name: Johnstone, C. P.
name: Leitzinger, M.
name: Benedikt, M.
name: Fossati, L.
name: Kislyakova, K. G.
name: Marty, B.
name: Avice, G.
name: Fegley, B.
name: Odert, P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Here we discuss the current state of knowledge on how atmospheric escape processes can fractionate noble gas isotopes and moderately volatile rock-forming elements that populate primordial atmospheres, magma ocean related environments, and catastrophically outgassed steam atmospheres. Variations of isotopes and volatile elements in different planetary reservoirs keep information about atmospheric escape, composition and even the source of accreting material. We summarize our knowledge on atmospheric isotope ratios and discuss the latest evidence that proto-Venus and Earth captured small H$_2$-dominated primordial atmospheres that were lost by EUV-driven hydrodynamic escape after the disk dispersed. All relevant thermal and non-thermal atmospheric escape processes that can fractionate various isotopes and volatile elements are discussed. Erosion of early atmospheres, crust and mantle by large planetary impactors are also addressed. Further, we discuss how moderately volatile elements such as the radioactive heat producing element $^{40}$K and other rock-forming elements such as Mg can also be outgassed and lost from magma oceans that originate on large planetary embryos and accreting planets. Outgassed elements escape from planetary embryos with masses that are $\geq$\,M$_{\rm Moon}$ directly, or due to hydrodynamic drag of escaping H atoms originating from primordial- or steam atmospheres at more massive embryos. We discuss how these processes affect the final elemental composition and ratios such as K/U, Fe/Mg of early planets and their building blocks. Finally, we review modeling efforts that constrain the early evolution of Venus, Earth and Mars by reproducing their measured present day atmospheric $^{36}$Ar/$^{38}$Ar, $^{20}$Ne/$^{22}$Ne noble gas isotope ratios and the role of isotopes on the loss of water and its connection to the redox state on early Mars.
description: 65 pages, 17 figures. This is a preprint of an article published in Space Science Reviews. The final authenticated version can be found online at: https://doi.org/10.1007/s11214-020-00701-x
Η ταυτότητα του μετανάστη στην ελληνική και γαλλική λογοτεχνία
Creators: name: Καρούλη-Παρδάλα, Φωτεινή Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: μετανάστης
ταυτότητα
ετερότητα
identity
immigrant
otherness

description: Σκοπός της διατριβής ήταν να προσεγγίσουμε και να διερευνήσουμε την ταυτότητα του μετανάστη μέσα από λογοτεχνικά κείμενα ελλήνων και γάλλων συγγραφέων. Εξετάσαμε την ορολογία της ταυτότητας, της ετερότητας ,της μετανάστευσης , της μεταναστευτικής λογοτεχνίας και της υβριδικότητας. Για την ανάλυση των κειμένων ακολουθήσαμε σε γενικές γραμμές τη μέθοδο της πολιτισμικής εικονολογίας η οποία είναι βασισμένη στη μέθοδο του Daniel- Henri Pageaux και τις κοινωνικές σταθερές. Αξιοποιήθηκαν όμως και άλλα στοιχεία από τη αφηγηματική θεωρία του Genette , από τις θεωρητικές προσεγγίσεις του Iser, Jauss και Naumann. .Στη συνέχεια ένα άλλο θέμα που ασχοληθήκαμε ήταν η σύγκριση λογοτεχνικών κειμένων ελληνικής λογοτεχνίας και γαλλικής λογοτεχνίας. Εστιάσαμε στις ομοιότητες και διαφορές των λογοτεχνικών κειμένων. Διαπιστώσαμε ότι στο χώρο της μετοικεσίας οι μετανάστες ανακαλύπτουν διαφορετικές εκδοχές αντιμετώπισης της ετερότητας γύρω τους και μέσα τους.
description: Τhe present thesis mainly aims to approach and investigate the identity of the immigrant people as it is mentioned in Greek and French literature. We examined the terminology of identity, variation, immigration, immigratory literature and “hybridity”. In order to analise the texts , in general terms,we followed the method of “cultural eikonology” imagologie which is based on the method of Daniel- Henri Pageaux and the appropriate social constants. However we developed more elements than the narrating theory of Genette, such as the theoretical approaches of Iser, Jauss and Naumann. Furthermore we dealt with one more topic such as the comparison of literary texts of Greek literature and French literature. We focused on the resemblances and the differences between literary texts. We realised that in the area of “metoikesia” the immigrants discover a variety of versions in order to confront with “alterity” around them and inside themselves.
Growing dynamical length, scaling and heterogeneities in the 3d Edwards-Anderson model
Creators: name: Jaubert, Ludovic D. C.
name: Chamon, Claudio
name: Cugliandolo, Leticia F.
name: Picco, Marco
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study numerically spatio-temporal fluctuations during the out-of-equilibrium relaxation of the three-dimensional Edwards-Anderson model. We focus on two issues. (1) The evolution of a growing dynamical length scale in the glassy phase of the model, and the consequent collapse of the distribution of local coarse-grained correlations measured at different pairs of times on a single function using {\it two} scaling parameters, the value of the global correlation at the measuring times and the ratio of the coarse graining length to the dynamical length scale (in the thermodynamic limit). (2) The `triangular' relation between coarse-grained local correlations at three pairs of times taken from the ordered instants $t_3 \leq t_2 \leq t_1$. Property (1) is consistent with the conjecture that the development of time-reparametrization invariance asymptotically is responsible for the main dynamic fluctuations in aging glassy systems as well as with other mechanisms proposed in the literature. Property (2), we stress, is a much stronger test of the relevance of the time-reparametrization invariance scenario.
description: 24 pages, 12 figs
High-temperature superconductivity on the verge of a structural instability in lanthanum superhydride
Creators: name: Sun, Dan
name: Minkov, Vasily S.
name: Mozaffari, Shirin
name: Chariton, Stella
name: Prakapenka, Vitali B.
name: Eremets, Mikhail I.
name: Balicas, Luis
name: Balakirev, Fedor F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A possibility of high, room-temperature superconductivity was predicted for metallic hydrogen in the 1960s. However, metallization and superconductivity of hydrogen are yet to be unambiguously demonstrated in the laboratory and may require pressures as high as 5 million atmospheres. Rare earth based "superhydrides" such as LaH10 can be considered a close approximation of metallic hydrogen even though they form at moderately lower pressures. In superhydrides the predominance of H-H metallic bonds and high superconducting transition temperatures bear the hallmarks of metallic hydrogen. Still, experimental studies revealing the key factors controlling their superconductivity are scarce. Here, we report on the pressure and magnetic field response of the superconducting order observed in LaH10. For LaH10 we find a correlation between superconductivity and a structural instability, strongly affecting the lattice vibrations responsible for the superconductivity.
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Vine
Creators: name: Harwood, Sarah
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The VINE was a 53nt wooden sloop built at Northwich in 1788. At time of loss on 5 June 1877, the vessel was owned by O Thomas of Runcorn and was carrying 105 tons of roofing slate from Port Dinorwic to Liverpool. The sloop was caught in a southwesterly gale force 9 and sprang a leak due to the stress of weather. The slopp eventually foundered 10 miles southeast of the Great Orme.
NLO QCD corrections to W boson production with a massive b-quark jet pair at the Fermilab Tevatron p-pbar collider
Creators: name: Cordero, F. Febres
name: Reina, L.
name: Wackeroth, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the Next-to-Leading Order (NLO) QCD corrections to W-b-bbar production including full bottom-quark mass effects. We study the impact of NLO QCD corrections on the total cross section and invariant mass distribution of the bottom-quark jet pair at the Fermilab Tevatron p-pbar collider. We perform a detailed comparison with a calculation that considers massless bottom quarks. We find that neglecting bottom-quark mass effects overestimates the NLO total cross-section for W-b-bbar production at the Tevatron by about 8% independent of the choice of renormalization and factorization scale.
description: 16 pages, 13 figures, RevTeX4, 3 references and 2 figures added, published version