cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A phase field formulation for dissolution-driven stress corrosion cracking
Creators: name: Cui, Chuanjie
name: Ma, Rujin
name: Martínez-Pañeda, Emilio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We present a new theoretical and numerical framework for modelling mechanically-assisted corrosion in elastic-plastic solids. Both pitting and stress corrosion cracking (SCC) can be captured, as well as the pit-to-crack transition. Localised corrosion is assumed to be dissolution-driven and a formulation grounded upon the film rupture-dissolution-repassivation mechanism is presented to incorporate the influence of film passivation. The model incorporates, for the first time, the role of mechanical straining as the electrochemical driving force, accelerating corrosion kinetics. The computational complexities associated with tracking the evolving metal-electrolyte interface are resolved by making use of a phase field paradigm, enabling an accurate approximation of complex SCC morphologies. The coupled electro-chemo-mechanical formulation is numerically implemented using the finite element method and an implicit time integration scheme; displacements, phase field order parameter and concentration are the primary variables. Five case studies of particular interest are addressed to showcase the predictive capabilities of the model, revealing an excellent agreement with analytical solutions and experimental measurements. By modelling these paradigmatic 2D and 3D boundary value problems we show that our formulation can capture: (i) the transition from activation-controlled corrosion to diffusion-controlled corrosion, (ii) the sensitivity of interface kinetics to mechanical stresses and strains, (iii) the role of film passivation in reducing corrosion rates, and (iv) the dependence of the stability of the passive film to local strain rates. The influence of these factors in driving the shape change of SCC defects, including the pit-to-crack transition, is a natural outcome of the model, laying the foundations for a mechanistic assessment of engineering materials and structures.
A new all-year round CO2 fluxes multi-instrumental observatory in the High Arctic Tundra
Creators: name: GIAMBERINI, MARIASILVIA
Publisher: name: Zenodo
Year: 2025
Subjects: subject: CO2 fluxes
subject: Arctic
subject: Svalbard
subject: Winter
subject: Snow
subject: Virtual Research Environment
subject: Modelling
subject: Open Data

description: Poster presented at the ASSW 2025 - ICARP IV Summit in Boulder, Colorado (20-28 March 2025).

Abstract:

Arctic amplification will bring rapid changes in the tundra carbon cycle, possibly transforming the tundra from a carbon sink into a carbon source. Monitoring the all-year-long CO2 cycle is a challenge, due to the remoteness, the winter weather conditions and the lack of infrastructures. Nevertheless, all-year data are extremely precious, as winter emissions are the “great unknown” of the Arctic carbon cycle (Natali, 2019). As most studies concentrate on the short summer season, it is therefore difficult to provide an accurate tundra carbon budget. We made the most of the facilities offered by the permanent Ny Ålesund research station in the Svalbard Archipelago (NO) to create a multi-instrument all-year round observatory of CO2 fluxes, consisting in an array of instruments that measure CO2 fluxes at different scales, as portable flux chambers, Eddy Covariance and an array of below and above ground CO2 sensors aimed to measure winter CO2 fluxes from the snowpack, particularly aimed to intercept wind-burst emissions, when the Eddy Covariance fails due to the absence of vertical turbulence, all complemented by meteo stations. All data are integrated and made available following the FAIR principles through a web portal that will be available through the Italian Arctic Data Centre, SIOS, the Svalbard Integrated Observing System and a CNR Virtual Research Environment (VRE). We aim to create an open virtual laboratory for modelling arctic CO2 fluxes at multiple scales and to serve as seed for a pan-arctic network of similar observatories, possibly including other observation platforms as airborne remote-sensing.
Precise determination of the superconducting gap along the diagonal direction of Bi2Sr2CaCu2O8+y: Evidence for extended s-wave gap symmetry
Creators: name: Zhao, Guo-meng
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report high-resolution spectra of the second derivative -d^{2}(ReΣ)/dω^{2} of the real part of electron self-energy Σalong the diagonal direction (where ω= E_{F}-E - Δ_{D} and Δ_{D} is the diagonal superconducting gap) for a nonsuperconducting La_{1.97}Sr_{0.03}CuO_{4} (LSCO) crystal and a superconducting Bi_{2}Sr_{2}CaCu_{2}O_{8+y} (BSCCO) crystal with T_{c} = 91 K. The -d^{2}(ReΣ)/dω^{2} spectrum of the nonsuperconducting LSCO shows clear peak features, which match precisely with those in the phonon density of states obtained from neutron scattering. Similarly, if we assign Δ_{D} = 7\pm1 meV for the superconducting BSCCO, the peak features in -d^{2}(ReΣ)/dω^{2} of this compound also match precisely with those in the phonon density of states and the tunneling spectrum. The present results rule out seemingly well accepted d-wave gap symmetry and strongly support an extended s-wave gap symmetry with eight line nodes.
description: 5 pages, 3 figures
Hamilton-Jacobi approach for linearly acceleration-dependent Lagrangians
Creators: name: Aguilar-Salas, Alejandro
name: Rojas, Efraín
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We develop a constructive procedure for arriving at the Hamilton-Jacobi framework for the so-called affine in acceleration theories by analysing the canonical constraint structure. We find two scenarios in dependence of the order of the emerging equations of motion. By properly defining generalized brackets, the non-involutive constraints that originally arose, in both scenarios, may be removed so that the resulting involutive Hamiltonian constraints ensure integrability of the theories and, at the same time, lead to the right dynamics in the reduced phase space. In particular, when we have second-order in derivatives equations of motion we are able to detect the gauge invariant sector of the theory by using a suitable approach based on the projection of the Hamiltonians onto the tangential and normal directions of the congruence of curves in the configuration space. Regarding this, we also explore the generators of canonical and gauge transformations of these theories. Further, we briefly outline how to determine the Hamilton principal function $S$ for some particular setups. We apply our findings to some representative theories: a Chern-Simons-like theory in $(2+1)$-dim, an harmonic oscillator in $2D$ and, the geodetic brane cosmology emerging in the context of extra dimensions.
description: 15 pages, no figures
A Flexible and Secure Remote Systems Authentication Scheme Using Smart Cards
Creators: name: Das, Manik Lal
Publisher: name: arXiv
Year: 2008
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: The paper presents an authentication scheme for remote systems using smart card. The scheme prevents the scenario of many logged in users with the same login identity, and does not require password/verifier table to validate the users' login request. The scheme provides a user-friendly password change option, and withstands the replay, impersonation, stolen-verifier, guessing, and denial-of-service attacks.
Conceptions of experimentation during a science fair : a case of four science nine/ten honour students
Creators: name: Lau, Wayne
Publisher: name: University of British Columbia
Year: 2009

description: This exploratory case study documented the conceptions of experimentation of four Science 9/10 honour students prior to, during, and after their participation in a science fair that took place in a high school setting. The four student participants consisted of: a male and a female student with experience in a science fair, and a male and a female student with no experience in a science fair. The data for this study were the students'journals and responses to a questionnaire, and in-depth phenomenological interviews. At the start of the science fair, all four students had an everyday sense of experimentation: trying or carrying out a procedure and learning from the experience. One of the four students also had a scientific sense of experimentation: identifying variables and figuring out the procedure to solve a problem. As the students worked on their science fair projects, they reiterated their initial conceptions of experimentation. The students also elaborated on their conceptions by adding that experiments: can be "formal" or "informal," answer questions, involve "creativity," and are a part of a learning process. By the end of the science fair, all but one of the students kept their initial conceptions of experimentation. Documenting the above students' conceptions of typical science classroom activities, such as structured laboratory activities and demonstration, was also an integral part of this study. In general the students' thoughts on the above activities were similar to their conceptions of experimentations. The greater the amount of hands-on involvement and input to the procedure from the student, the more likely the students considered the activity an experiment. An examination of the type of investigation the students' conducted for their projects showed that three of the projects could be classified as the engineering model of experimentation while the fourth project could be classified as the science model of experimentation. The above classification provided insight on the rationales behind the students' conceptions of experimentation. This study has implications for both teachers and researchers. Specifically, it implies that students have ideas about experimentation and these ideas need to be incorporated in science classroom activities and the students' own investigations. By deliberately engaging students to think about the nature of science and scientific inquiry, students can move towards scientific experimentation.
Εμπειρία και γνώση στον Αριστοτέλη:
Creators: name: Ζαρδαβά, Κυριακή Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Ψυχή
Αίσθηση
Αισθητηριακές αντιλήψεις
Φαντασία
Μνήμη Ανάμνηση
Soul
Sense
Sensories perceptions
Fantasy
Memory
Recollection

description: Ο Αριστοτέλης στη γνωσιοθεωρία του υποστηρίζει ότι το αφετηριακό σημείο απόκτησης γνώσης είναι η επίδραση του αισθητού αντικειμένου στη συνείδηση της αισθητής δύναμης. Η επίδραση της αίσθησης δημιουργεί αισθητές εικόνες, οι οποίες με τη σειρά τους προκαλούν την ενεργοποίηση του πνεύαμοτς και τη δημιουργία εννοιών. Η απόκτηση της γνώσης, παρουσιάζεται ως μια συνολική διαδικασία την οποία θα αποκαλούσαμε νοητική διαδικασία, όπου γίνεται κατανοητή από την ανάλυση της σημασία του ορισμού της ψυχής και η οποία έτσι όπως αναπτύσσεται έχει ως αφετηρία τη γέννηση μέσα στη συνείδηση αισθητών αναπαραστάσεων και συμβαδίζει με τη νόηση, από την οποία εμφανίζονται οι νοητικές αναπαραστάσεις ή έννοιες
description: Aristotle, the great philosopher, on his theory of knowledge sustain that the starting line to get knowledge is the effect of perceptible object above esthetics power of conscience. The reactivation of sensation produce perceptible pictures or imaginations, as he names them, which on their turn provoke the activity of spirit and the production of notions. So, the obtainment of knowledge presents as a total process, which we would call cognitive process, which can be comprehensible from the analysis of the significance of soul definition, that Aristotle does, and which, as it be developed into time has a starting point the genesis into conscience of visibly representation and culminate with noesis, from which appear the rationales representations or notions.
Oceanic Superrotation on Tidally Locked Planets
Creators: name: Zeng, Yaoxuan
name: Yang, Jun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Is there oceanic superrotation on exoplanets? Atmospheric superrotation, characterized by west-to-east winds over the equator, is a common phenomenon in the atmospheres of Venus, Titan, Saturn, Jupiter, and tidally locked exoplanets. The stratospheric atmosphere of Earth is also superrotating during the westerly phase of the quasi-biennial oscillation (QBO). However, whether the same phenomenon can occur in ocean is poorly known. Through numerical simulations, here we show that oceanic superrotation does occur on tidally locked terrestrial planets around low-mass stars. Its formation (spun-up from rest) is associated with surface winds, the equatorward momentum convergence by Rossby waves, and the eastward propagation of Kelvin waves in the ocean. Its maintenance is driven by equatorward momentum transports of coupled Rossby-Kelvin waves in the ocean excited from the uneven stellar radiation distribution. The width of the superrotation is mainly constrained by the Rossby deformation radius in the ocean, while its strength is more complex. Many factors can influence the strength, including planetary rotation rate, stellar flux, greenhouse gas concentration, seawater salinity, bottom drag, and a scaling theory is lack. This work confirms that superrotation can occur on tidally locked terrestrial planets with seawater oceans and suggests that it may also occur on tidally locked hot planets with magma oceans that will possibly be observed in the near future.
Minutes of the Annual General Meeting of the Rainbow Ranche Limited, July 15, 1943
Creators: name: Rainbow Ranche
Publisher: name: The University of British Columbia
Year: 2017

description: 2 copies of the minutes of annual general meeting of the Rainbow Ranche Limited, July 15, 1943, signed by Mr. and Mrs. McAllister, Mr. and Mrs. Goldie; other copy signed by R.S. Dormer.
Title: Strengthening PHC System Administration in Nigeria: A Foundation to Universal Health Coverage and a Shield to Emerging Infectious diseases and Pandemics
Creators: name: Mohammed, Ibrahim
name: Omoleke, Semeeh
Publisher: name: Zenodo
Year: 2024

description: The primary healthcare system (PHC) in Nigeria, pivotal to achieving universal health coverage (UHC), faces substantial challenges. This paper discusses the strengthening of Nigeria's PHC system, positioning it as a foundation for UHC and a shield against infectious diseases and pandemics. We review the PHC's current state, its history, governance, and the impact of policy changes. Our analysis includes PHC's role in disease outbreaks and emergencies, emphasizing the necessity of robust political support, funding, infrastructure, human resources, and community participation. The paper proposes strategies to revitalize PHC for effective health service delivery and resilience in health emergencies, thus contributing to the attainment of health-related Sustainable Development Goals.
Schäfer, Bernd: Staat und katholische Kirche in der DDR
Creators: name: Zademach, Wieland
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 52 Nr. 1 (2003): Ökumenische Rundschau, Band 52, Heft 1
The Inflationary Trispectrum for Models with Large Non-Gaussianities
Creators: name: Chen, Xingang
name: Huang, Min-xin
name: Shiu, Gary
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute the leading order contribution to the four-point function of the primordial curvature perturbation in a class of single field models where the inflationary Lagrangian is a general function of the inflaton and its first derivative. This class of models includes string motivated inflationary models such as DBI inflation. We find that the trispectrum for some range of parameters could potentially be observed in future experiments. Moreover, the trispectrum can distinguish DBI inflation from other inflation models with large non-Gaussianities which typically have a similar bispectrum. We also derive a set of consistency conditions for n-point functions of the primordial curvature perturbation in single field inflation, generalizing Maldacena's result for 3-point functions.
description: v2: 5 pages, journal version. v3, v4: formulae for the momentum dependence of trispectrum corrected, main conclusions remain unchanged, this version supersedes the journal version. v5: minor revision with an added reference
Ανάλυση , πρακτική εφαρμογή και αξιολόγηση από τους εκπαιδευτικούς των νέων διδ. εγχειριδίων γλώσσας της Α' τάξης ως προς τη διδακτική μεθοδολογία και το περιεχόμενο:
Creators: name: Ξεφτέρη, Ελένη Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Αλφαβητισμός
Γραμματισμός
Γνωστικό ή αυτόνομο μοντέλο γραμματισμού
Κοινωνικό πολιτισμικό ή ιδεολογικό μοντέλο
Αναδυόμενος γραμματισμός
Ολιστιστική προσέγγιση
Literacy
Cognitice or autonomous model
Sociocultural or ideological model
Emerging literacy
Whole language approach

description: Τα νέα διδακτικά εγχειρίδια για το γλωσσικό μάθημα στο Δημοτικό σχολείο είναι το αποτέλεσμα του μεταρρυθμιστικού εγχειρήματος που ξεκίνησε το 1999, με την έκδοση του Προγράμματος Σπουδών της Νεοελληνικής Γλώσσας για την προ-Δημοτική εκπαίδευση- Νηπιαγωγείο και Δημοτικό σχολείο ( Φ.Ε.Κ. 93/10-02-1999), συνεχίστηκε με την έκδοση των Δ.Ε.Π.Π.Σ. και ολοκληρώθηκε με τη συγγραφή και την εισαγωγή τους στο Δημοτικό Σχολείο κατά το σχολικό έτος 2006-2007 και κάποιων το επόμενο 2007-2008. Με την εν λόγω έρευνα, επικεντρώνουμε στο γλωσσικό μάθημα στην Α΄ τάξη του Δημοτικού Σχολείου, μελετώντας πρώτα, το αναλυτικό πρόγραμμα για το γλωσσικό μάθημα στη συγκεκριμένη τάξη, πόσο άλλαξε σε σχέση με το παλιότερο και σε τι, το ιδεολογικό του πλαίσιο, ποια αντίληψη για το γραμματισμό υιοθετεί, με ποιες διδακτικές μεθόδους την προωθεί, τη σύνδεσή του, αν υπάρχει, με το αναλυτικό πρόγραμμα της Προσχολικής Εκπαίδευσης, στη συνέχεια τα νέα διδακτικά εγχειρίδια που το υλοποιούν, ερευνώντας συγκεκριμένα τις διδακτικές προσεγγίσεις που η συγγραφική ομάδα παρουσιάζει στο βιβλίο του δασκάλου, ποιες από αυτές και πώς υλοποιούνται στα βιβλία και τα τετράδια εργασιών του/της μαθητή/τριας, την ιδεολογία που περνάει μέσα από τα περιεχόμενα των κειμένων και της εικονογράφησης τους, και τέλος πώς όλα αυτά υλοποιούνται από τους εκπαιδευτικούς στην πράξη μέσα στη σχολική τάξη. Λέξεις-κλειδιά: αλφαβητισμός, γραμματισμός, γνωστικό μοντέλο γραμματισμού, κοινωνικοπολιτισμικό μοντέλο γραμματισμού, διδακτικές προσεγγίσεις πρώτης ανάγνωσης και γραφής, αναδυόμενος γραμματισμός, ολιστική προσέγγιση, αναλυτικοσυνθετική μέθοδος.
description: The new schoolbooks for the Greek language lesson in primary schools, come as a result of a reform project, which began with the introduction of the new curriculum for the greek language (both for nursery and primary schools) in 1999, continued by the introduction of the inter-disciplinary curriculum
Ανάπτυξη μεθόδων προσδιορισμού μολύβδου και καδμίου στο μέλι: η επιβάρυνση των ελληνικών μελιών
Creators: name: Γερολύμου, Ιωάννα Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Μέλι
Βαρέα μέταλλα
Κάδμιο
Μόλυβδος
Αμιγείς κατηγορίες μελιού
Βιολογικό μέλι
Honey
Heavy metals
Cadmium
Lead
Monofloral honey
Organic honey

description: Σκοπός της εργασίας είναι να αναπτυχθεί μέθοδος προσδιορισμού του Cd και του Pb στο μέλι και στη συνέχεια να βρεθεί η επιβάρυνση του προϊόντος από τα βαρέα αυτά μέταλλα. Έγιναν αναλύσεις μελιού από 3 αμιγείς κατηγορίες μελιού (πορτοκαλιάς, θυμαριού, πεύκου). Αναλύθηκαν επίσης εμπορικά δείγματα, που τοποθετήθηκαν σε επιβαρυμένες περιοχές από καυσαέρια και δρόμους ταχείας κυκλοφορίας. Τα δείγματα κατεργασθήκανε με τη μέθοδο της «υγρής καύσης». Στη συνέχεια, μετά την παραλαβή των διαλυτών μορφών του Cd και του Pb, το Cd ανιχνεύτηκε και μετρήθηκε σε Φασματοφωτόμετρο Ατομικής Απορρόφησης Φλόγας και ο Pb στο Φασματοφωτόμετρο Ατομικής Απορρόφησης-μονάδα ατομοποίησης φούρνου γραφίτη. Μεταξύ των διαφόρων κατηγοριών μελιού παρατηρήθηκαν διαφορές στις συγκεντρώσεις του Cd και του Pb λόγω του υποστρώματος και της περιοχής από την οποία συλλέχτηκαν τα δείγματα. Οι συγκεντρώσεις στο μέλι του Cd κυμάνθηκαν από 3-25 μg/kg και του Pb από 3-62 μg/kg. Τα όρια ανίχνευσης του Cd ήταν 2 μg/kg και του Pb ήταν 1 μg/kg. Οι ανακτήσεις που βρέθηκαν ήταν ικανοποιητικές. Η μέθοδος μπορεί να εφαρμοστεί για αναλύσεις ρουτίνας και έλεγχο της περιβαλλοντικής ρύπανσης σε επίπεδο μg/kg. Οι τιμές που βρέθηκαν στα ελληνικά μέλια είναι εντός των ορίων που έχουν καθοριστεί από την Ε.Ε. και θεωρούνται ασφαλή για τον καταναλωτή. Δείγματα μελιού που συλλέχτηκαν από περιοχές που γειτνίαζαν με αυτοκινητόδρομους ήταν περισσότερο επιβαρυμένα. Περισσότερο επιβαρυμένα ήταν επίσης τα μέλια μελιτώματος (πευκόμελο) πιθανό λόγω μεγαλύτερης έκθεσης των μελιτωδών εκκρίσεων σε αερομεταφερόμενη επιβάρυνση από εκείνη του νέκταρος.
description: The purpose of this study was to describe a method that allows the direct determination Cd and Pb in honey. Furthermore 92 samples of greek honeys were analyzed. The samples were monofloral honeys (pine, thymus, orange honey), sampler that were bought from the supermarket (organic and conventional) and samples that had been collected from colonies that were transferred near a heavy polluted area. For validation purposes the linearity, the sensitivity the accuracy and the mean recovery were assessed. Calibration curves have been produced for quantification and were matrix matched in order to avoid the matrix effect. The concentrations of Cd were found by flame atomic absorption spectrometry and Pb by electrothermal atomic absorption spectrometry. The levels of Cd varied from 3to25 mg/kg and Pb from 3 to 62 mg/kg. The detection limits were cd:2mg/kg and Pb mg/kg.
Το φαινόμενο της παγκόσμιας φτώχειας. Η αντιμετώπισή του στο πλαίσιο της προστασίας των δικαιωμάτων του ανθρώπου:
Creators: name: Παπανδρέου, Μάριος Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Παγκόσμια φτώχεια
Παιδική φτώχεια
Αναπτυξιακοί στόχοι χιλιετίας
Δικαιώματα του ανθρώπου
Αξιοπρέπεια
World poverty
Child poverty
Millennium development goals
Human rights
Human dignity

description: Η παγκόσμια φτώχεια ως κατάσταση που αντιβαίνει στην προστασία των δικαιωμάτων του ανθρώπου-η δράση των Ηνωμένων Εθνών για την αντιμετώπιση της παγκόσμιας φτώχειας-Η πιθανότητα υιοθέτησης ενός δικαιώματος στη μη φτώχεια
description: World poverty is a situation contrary to the protection of human rights-un action towards the elimination of world poverty-is there a right not to be a poor?
Annihilation and Control of Chiral Domain Walls with Magnetic Fields
Creators: name: Karna, Sunil K.
name: Marshall, Madalynn
name: Xie, Weiwei
name: DeBeer-Schmitt, Lisa
name: Young, David P.
name: Vekhter, Ilya
name: Shelton, William A.
name: Kovacs, Andras
name: Charilaou, Michalis
name: DiTusa, John F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The control of domain walls is central to nearly all magnetic technologies, particularly for information storage and spintronics. Creative attempts to increase storage density need to overcome volatility due to thermal fluctuations of nanoscopic domains and heating limitations. Topological defects, such as solitons, skyrmions, and merons, may be much less susceptible to fluctuations, owing to topological constraints, while also being controllable with low current densities. Here, we present the first evidence for soliton/soliton and soliton/antisoliton domain walls in the hexagonal chiral magnet Mn1/3NbS2 that respond asymmetrically to magnetic fields and exhibit pair-annihilation. This is important because it suggests the possibility of controlling the occurrence of soliton pairs and the use of small fields or small currents to control nanoscopic magnetic domains. Specifically, our data suggest that either soliton/soliton or soliton/antisoliton pairs can be stabilized by tuning the balance between intrinsic exchange interactions and long-range magnetostatics in restricted geometries
description: 8 pages, 4 figures
Electron transmission and phase time in semiconductor superlattices
Creators: name: Sprung, D. W. L.
name: van Dijk, W.
name: Veenstra, C. N.
name: Martorell, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss the time spent by an electron propagating through a finite periodic system such as a semiconductor superlattice. The relation between dwell-time and phase-time is outlined. The envelopes of phase-time at maximum and minimum transmission are derived, and it is shown that the peaks and valleys of phase-time can be well described by parameters fitted at the extrema. For a many-period system this covers most of the allowed band. Comparison is made to direct numerical solutions of the time-dependent Schrödinger equation by Veenstra et al. [cond-mat/0411118] who compared systems with and without addition of an anti-reflection coating (ARC). With an ARC, the time delay is consistent with propagation at the Bloch velocity of the periodic system, which significantly reduces the time delay, in addition to increasing the transmissivity.
description: 8 pages, 10 figures, based on a talk at Theory-Canada 3 in Edmonton AB, June 2007
Evolution equations for truncated moments of the parton distributions
Creators: name: Kotlorz, D.
name: Kotlorz, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive evolution equations for the truncated Mellin moments of the parton distributions. We find that the equations have the same form as those for the partons themselves. The modified splitting function for n-th moment $P'(n,x)$ is $x^{n}P(x)$, where $P(x)$ is the well-known splitting function from the DGLAP equation. The obtained equations are exact for each n-th moment and for every truncation point $x_0\in (0;1)$. They can be solved with use of standard methods of solving the DGLAP equations. This approach allows us to avoid the problem of dealing with the unphysical region $x\to 0$. Furthermore, it refers directly to the physical values - moments (rather than to the parton distributions), what enables one to use a wide range of deep-inelastic scattering data in terms of smaller number of parameters. We give an example of an application.
description: 6 pages, 3 figures
Magnetically-controlled velocity selection in a cold atom sample using stimulated Raman transitions
Creators: name: Terraciano, Matthew L.
name: Olson, Spencer E.
name: Bashkansky, Mark
name: Dutton, Zachary
name: Fatemi, Fredrik K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We observe velocity-selective two-photon resonances in a cold atom cloud in the presence of a magnetic field. We use these resonances to demonstrate a simple magnetometer with sub-mG resolution. The technique is particularly useful for zeroing the magnetic field and does not require any additional laser frequencies than are already used for standard magneto-optical traps. We verify the effects using Faraday rotation spectroscopy.
description: 5 pages, 6 figures
Présentation d'une méthodologie d'évaluation de la faisabilité de la substitution sensorielle par électrostimulation linguale pour la prévention des escarres chez le bléssé médullaire paraplégique
Creators: name: Moreau-Gaudry, Alexandre
name: Prince, Anne
name: Chenu, Olivier
name: Demongeot, Jacques
name: Payan, Yohan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Medical Physics (physics.med-ph)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Pressure ulcers are recognized as a major health issue in individuals with spinal cord injuries and new approaches to prevent this pathology are necessary. An innovative health strategy is being developed through the use of computer and sensory substitution via the tongue in order to compensate for the sensory loss in the buttock area for individuals with paraplegia. This sensory compensation will enable individuals with spinal cord injuries to be aware of a localized excess of pressure at the skin/seat interface and, consequently, will enable them to prevent the formation of pressure ulcers by relieving the cutaneous area of suffering. This work reports an initial evaluation of this approach and the feasibility of creating an adapted behavior, with a change in pressure as a response to electro-stimulated information on the tongue.
Single magnetic white dwarfs with Balmer emission lines: A small class with consistent physical characteristics as possible signposts for close-in planetary companions
Creators: name: Gaensicke, Boris T.
name: Rodriguez-Gil, Pablo
name: Fusillo, Nicola P. Gentile
name: Inight, Keith
name: Schreiber, Matthias R.
name: Pala, Anna F.
name: Tremblay, Pier-Emmanuel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report the identification of SDSS J121929.45+471522.8 as the third apparently isolated magnetic (B~18.5+/-1.0,MG) white dwarf exhibiting Zeeman-split Balmer emission lines. The star shows coherent variability at optical wavelengths with an amplitude of ~0.03mag and a period of 15.26h, which we interpret as the spin period of the white dwarf. Modelling the spectral energy distribution and Gaia parallax, we derive a white dwarf temperature of 7500+/-148K, a mass of 0.649+/-0.022Msun, and a cooling age of 1.5+/-0.1Gyr, as well as an upper limit on the temperature of a sub-stellar or giant planet companion of ~250K. The physical properties of this white dwarf match very closely those of the other two magnetic white dwarfs showing Balmer emission lines: GD356 and SDSS J125230.93$-$023417.7. We argue that, considering the growing evidence for planets and planetesimals on close orbits around white dwarfs, the unipolar inductor model provides a plausible scenario to explain the characteristics of this small class of stars. The tight clustering of the three stars in cooling age suggests a common mechanism switching the unipolar inductor on and off. Whereas Lorentz drift naturally limits the lifetime of the inductor phase, the relatively late onset of the line emission along the white dwarf cooling sequence remains unexplained.
description: Accepted for publication in MNRAS, 10 pages, 6 figues
On Anomaly Mediated SUSY Breaking
Creators: name: de Alwis, S. P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A discrepancy between the Anomaly Mediated Supersymmetry Breaking (AMSB) gaugino mass calculated from the work of Kaplunovsky and Louis (hep-th/9402005) (KL) and other calculations in the literature is explained, and it is argued that the KL expression is the correct one relevant to the Wilsonian action. Furthermore it is argued that the AMSB contribution to the squark and slepton masses should be replaced by the contribution pointed out by Dine and Seiberg (DS) which has nothing to do with Weyl anomalies. This is not in general equivalent to the AMSB expression, and it is shown that there are models in which the usual AMSB expression would vanish but the DS one is non-zero. In fact the latter has aspects of both AMSB and gauge mediated SUSY breaking. In particular like the latter, it gives positive squared masses for sleptons.
description: Reference added, minor corrections and clarifications, version to be published in PRD 25 pages
Δημιουργία διαδραστικού τίτλου υψηλής ευκρίνειας Blu-Ray disc, μιας ζωντανής οπτικοακουστικής παραγωγής
Creators: name: Καψούρα, Ελένη Γεωργίου
name: Κουφονίκος, Ιωάννης Αχιλλέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Τεχνολογία bluray
Υψηλή ευκρίνεια εικόνας
Περιφερικός ήχος
Bluray technologie
High definition
Surround sound

description: Η παρούσα μεταπτυχιακή διατριβή παρουσιάζει την δημιουργία ενός project, Blu-Ray, με θέμα το φεστιβάλ τραγουδιού Θεσσαλονίκης. Το ενδιαφέρον κινείται στην κάλυψη του γεγονότος με τεχνολογίες βίντεο υψηλής ευκρίνειας και περιφερικό ήχο, την επεξεργασία ενός τέτοιου υλικού και την τελική διαμόρφωσή και διανομή του σε Blu Ray Disc. Η εργασία αναπτύσσεται σε δύο μέρη, το θεωρητικό και το πρακτικό.Το θεωρητικό μέρος αρχικά αναφέρεται στο βίντεο υψηλής ευκρίνειας και μετά από μια σύντομη ιστορική αναδρομή γίνεται λόγος για τις μορφές χρήσης του. Έπειτα, παρουσιάζονται τα χαρακτηριστικά του βίντεο γενικότερα και αναπτύσσονται σε σύγκριση με αυτά του βίντεο υψηλής ευκρίνειας. Καταγράφονται ουσιαστικά τα διάφορα φορμά, που έχει εισάγει κάθε κατασκευάστρια εταιρία, στη βιομηχανία του κινηματογράφου και της τηλεόρασης. Αμέσως μετά επεξηγείται ο όρος περιφερικός ήχος και επιχειρείται μια σύντομη ιστορική αναδρομή. Παρουσιάζονται τεχνικές για την ηχογράφηση σε surround μορφή και ακολουθεί περιγραφή των χαρακτηριστικών του ψηφιακού ήχου, των surround φορμά και της βέλτιστης αναπαραγωγής περιφερικού ήχου.Το πρακτικό μέρος διαπραγματεύεται όλη την πορεία της παραγωγής Blu-Ray disc, από τα σταδία της προ-παραγωγής, στην υλοποίηση και την μετα-παραγωγή μέχρι την ολοκλήρωση του project. Περιγράφονται αναλυτικά, το πρότυπο υλοποίησης των γυρισμάτων και η επεξεργασία εικόνας και ήχου, μέχρι τη συγγραφή τίτλου DVD.
description: The following writing summarizes the development of a High Definition Blu–Ray Disc production. It is divided in two sections. The first part is theoretical and presents the characteristics of HD video formats and surround sound. The most important high definition production systems are being represented. The second part describes analytical all the decisions and actions that took place during the pre-production, production and post-production steps. The aim was to design a complete multi-camera system which would be capable to capture uncompressed High Definition signal and surround sound 5.1. We edit the shooting material complaining shoots from different cameras, mixing the surround sound and relish the material in Blu-Ray Disc.The final product contains the competition part of Thessaloniki’s Song Festival 2008.
description: Σε συνεργασία με το τμήμα Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
Deep Gaussian Processes for geophysical parameter retrieval
Creators: name: Svendsen, Daniel Heestermans
name: Morales-Álvarez, Pablo
name: Molina, Rafael
name: Camps-Valls, Gustau
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geophysics (physics.geo-ph)
subject: Machine Learning (cs.LG)
subject: Signal Processing (eess.SP)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper introduces deep Gaussian processes (DGPs) for geophysical parameter retrieval. Unlike the standard full GP model, the DGP accounts for complicated (modular, hierarchical) processes, provides an efficient solution that scales well to large datasets, and improves prediction accuracy over standard full and sparse GP models. We give empirical evidence of performance for estimation of surface dew point temperature from infrared sounding data.
description: Preprint, Paper published in IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, Valencia, 2018, pp. 6175-6178
Pure Spinor Superspace Identities for Massless Four-point Kinematic Factors
Creators: name: Mafra, Carlos R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using the pure spinor formalism we prove identities which relate the tree-level, one-loop and two-loop kinematic factors for massless four-point amplitudes. From these identities it follows that the complete supersymmetric one- and two-loop amplitudes are immediately known once the tree-level kinematic factor is evaluated. In particular, the two-loop equivalence with the RNS formalism (up to an overall coefficient) is obtained as a corollary.
description: 10 pages, harvmac TeX. v2: Updated affiliation and Report-no:
Πεποιθήσεις εφήβων μαθητών και μαθητριών για το φαινόμενο της σεξουαλικής παρενόχλησης στις μεταξύ τους σχέσεις:
Creators: name: Μερτζιάνη, Ειρήνη Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Σεξουαλική παρενόχληση
Φύλο
Βία
Φεμινισμός
Εφηβεία
Σεξουαλικότητα
Sexual harassment
Gender
Violence
Feminism
Adolescence
Sexuality

description: Η σεξουαλική παρενόχληση είναι η ανεπιθύμητη και αδιάκριτη σεξουαλική συμπεριφορά και αποτελεί μια μορφή βίας κατά των γυναικών, ένα ζήτημα που ανέδειξε το φεμινιστικό κίνημα. Έρευνες έδειξαν ότι το φύλο είναι ο σημαντικότερος παράγοντας που επηρεάζει τις εμπειρίες και τις πεποιθήσεις των ατόμων για το φαινόμενο. Η παρούσα έρευνα αποτελεί την πρώτη ακαδημαϊκή μελέτη των πεποιθήσεων εφήβων μαθητών/τριών, στην Ελλάδα, για το φαινόμενο της σεξουαλικής παρενόχλησης, καθώς και των αντιδράσεών τους ως θυμάτων σε αυτό, με έμφαση στον παράγοντα φύλο, χρησιμοποιώντας ομάδες εστίασης. Η ανάλυση των δεδομένων έδειξε ότι οι έφηβοι/ες συνδέουν τη σεξουαλική παρενόχληση με τη βία, αναγνωρίζουν ότι είναι ανεπιθύμητη και αναπαράγουν τις κυρίαρχες ιδέες για το φαινόμενο, ενώ τα κορίτσια δίνουν πιο ευρείς ορισμούς για αυτό, σε σχέση με τα αγόρια. Το φύλο του δράστη, αλλά και η μορφή της σεξουαλικής παρενόχλησης, επηρεάζουν τις αντιδράσεις των θυμάτων. Μέσα από αυτές αναδεικνύεται η διάσταση της σεξουαλικότητας και οι σχέσεις εξουσίας μεταξύ των φύλων, συμφωνώντας με τις φεμινιστικές τοποθετήσεις για τη βία κατά των γυναικών γενικότερα. Ακόμα, παρουσιάζεται η σχετικότητα του φαινομένου, καθώς οι αντιδράσεις των εφήβων επηρεάζονται από μια σειρά από παράγοντες, όπως η παρουσία της παρέας τους, η σημασία της οποίας εκτίθεται.
description: Sexual harassment is an unwelcome, intrusive, sexual behaviour and it constitutes a form of violence against women, an issue that has been brought out by the feminist movement. Researches revealed that gender is the most important factor that affects individual’s experiences and beliefs about this phenomenon. The present research is the first academic study about the beliefs of male and female, adolescent students, in Greece, about the phenomenon of sexual harassment and their reactions as victims, pointing up the factor of gender, using focus groups. Data analysis showed that adolescents relate sexual harassment with violence, acknowledge that it is unwelcome and reproduce prevailed ideas about the phenomenon, whereas girls give wider definitions of it, related to the boys. Perpetrator’s gender, as well as the type of sexual harassment, influences the victims’ reactions. Through those reactions, sexuality and power relations between the two genders are demonstrated, complying with feminist notions about violence against women generally. Furthermore, a relativity of the phenomenon is presented, as adolescents’ reactions are affected by various elements, such as the presence of their friends, whose significance is exhibited.
Mieth, Dietmar, Snijdewind, Hadewych: Religion zwischen Gewalt und Beliebigkeit
Creators: name: Evers, Sven
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 52 Nr. 1 (2003): Ökumenische Rundschau, Band 52, Heft 1
Αμεσοι φόροι και ελευθερία παροχής υπηρεσιών:
Creators: name: Αγγελακοπούλου, Ζωή Μιλτιάδη
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Ελευθερία παροχής υπηρεσιών
Αμεσοι φόροι
Αρθρο 49 ΣΕΚ
Αρχή διατήρησης συνοχής φορολογικού συστήματος
Αρχή αποτελεσματικόττηας φορολογικών ελέγχων
Taxes
Freedom of randing services
49 SEK
Taxation
Efficiency of tax search

description: Οι άμεσοι φόροι ασκούν μεγάλη επιρροή στις θεμελιώδεις κοινοτικές ελευθερίες , όπως η ελευθερία παροχής υπηρεσιών διότι η επιβολή τους οδηγεί σε περιορισμό ή παραβίαση των εν λόγω ελευθεριών . Το φαινόμενο αυτό είναι σύνηθες σε ενδοκοινοτικό επίπεδο και οφείλεται στην αποκλειστική αρμοδιότητα των κρατών μελών στην ρύθμιση του τομέα της άμεσης φορολογίας.Επειδή, διαπιστώνεται από το Δ.Ε.Κ. η παραβίαση της ελευθερίας παροχής υπηρεσιών , το Δ.Ε.Κ. διέπλασε πλούσια νομολογία , η οποία ως επί το πλείστον αφορά παραβιάσεις της ελευθερίας παροχής υπηρεσιών με φορολογικά μέτρα ιδίως στους τομείς της κοινωνικής ασφάλισης , της εκπαίδευσης , των μεταφορών και της φορολογίας εν γένει. Σύμφωνα με την κρίση του Δ.Ε.Κ. , απαγορεύονται οι δυσμενείς φορολογικές διακρίσεις , άμεσες ή έμμεσες , στην ελευθερία παροχής υπηρεσιών . Όμως , η νομολογία του Δ.Ε.Κ. έκρινε ως επιτρεπτές εξαιρέσεις από την απαγόρευση περιορισμού της ελευθερίας παροχής υπηρεσιών για επιτακτικούς λόγους γενικού συμφέροντος , όπως η ανάγκη διατήρησης της συνοχής του φορολογικού συστήματος και η εξασφάλιση της αποτελεσματικότητας των φορολογικών ελέγχων.Συμπεραίνουμε λοιπόν, ότι είναι επιβεβλημένη η εναρμόνιση των νομοθεσιών των κρατών μελών στον τομέα των άμεσων φόρων.
description: The direct taxes cause a great impact on fundamental communal freedoms such as , the freedom of rendering of the services because the imposition of taxes leads to restraint or violation of such freedoms. This phenomenon is usual towards the interior of the European Community and is caused by the exclusive competence that member- states have in the field of direct taxation . Because the European Court of Justice ascertained violation of the freedom of rendering of the services , the European Court of Justice formed wide jurisprudence , which , until now, concerns violations of the freedom of rendering of the services , caused by taxes, especially in the fields of social community, education, transportation and taxation in general.According to the judgment of European Court of Justice unfavorable tax discriminations ,direct or indirect, against the freedom of rendering of the services , are forbidden. On the other hand, the jurisprudence of the European Court of Justice permitted exceptions from the prohibition of restraints of freedom of rendering of the services in case ad hoc there are imperative reasons of general interest , such as the need of maintenance the coherence of taxation system and the assurance of the effectiveness of tax controls. To conclude, it is incumbent upon me to harmonize the legislations of member- states in the field of direct taxes.
A thin testimony: anorexia, language, and control
Creators: name: De Fabrizio, Lucy Mary Anne
Publisher: name: University of British Columbia
Year: 2009

description: This thesis explores the use of self-representation as a medium for symbolic intervention into the institutionalized discourses of anorexia nervosa. The analysis takes into account the roles that such discourses play in not only explaining the anorectic's condition, but in constructing her identity in language. Much of the work draws on the often conflicting and competing discourses from medicine, psychoanalysis, psychiatry, psychotherapy, and feminism, but the paper also references lay discourses—the talk show, the beauty magazine, the made-for-television movie. Both the practicality and costs of such symbolic representations are explored and the relative lack of autobiography/self-representation in the literature is critiqued. While autobiography is no less susceptible than any other narrative to critiques of representation, it nonetheless forces a re-examination of narratives which have historically "carried more weight" as voices of authority on anorexia nervosa.
Modeling the production of VCV sequences via the inversion of a biomechanical model of the tongue
Creators: name: Perrier, Pascal
name: Ma, Liang
name: Payan, Yohan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: A control model of the production of VCV sequences is presented, which consists in three main parts: a static forward model of the relations between motor commands and acoustic properties; the specification of targets in the perceptual space; a planning procedure based on optimization principles. Examples of simulations generated with this model illustrate how it can be used to assess theories and models of coarticulation in speech.
Minutes of meeting of the Trustees of the Winfield and Okanagan Centre Irrigation District, September 1, 1943
Creators: name: Trustees Of The Winfield And Okanagan Centre Irrigation District
Publisher: name: The University of British Columbia
Year: 2017

description: Minutes of meeting of the Trustees of the Winfield and Okanagan Centre Irrigation District, dated September 1, 1943, regarding outstanding instalments on the Conservation Fund Loan, domestic water, and Crooked Lake dam.
Spectral Functions from Auxiliary-Field Quantum Monte Carlo without Analytic Continuation: The Extended Koopmans' Theorem Approach
Creators: name: Lee, Joonho
name: Malone, Fionn D.
name: Morales, Miguel A.
name: Reichman, David R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We explore the extended Koopmans' theorem (EKT) within the phaseless auxiliary-field quantum Monte Carlo (AFQMC) method. The EKT allows for the direct calculation of electron addition and removal spectral functions using reduced density matrices of the $N$-particle system, and avoids the need for analytic continuation. The lowest level of EKT with AFQMC, called EKT1-AFQMC, is benchmarked using small molecules, 14-electron and 54-electron uniform electron gas supercells, and diamond at the $Γ$-point. Via comparison with numerically exact results (when possible) and coupled-cluster methods, we find that EKT1-AFQMC can reproduce the qualitative features of spectral functions for Koopmans-like charge excitations with errors in peak locations of less than 0.25 eV in a finite basis. We also note the numerical difficulties that arise in the EKT1-AFQMC eigenvalue problem, especially when back-propagated quantities are very noisy. We show how a systematic higher order EKT approach can correct errors in EKT1-based theories with respect to the satellite region of the spectral function. Our work will be of use for the study of low-energy charge excitations and spectral functions in correlated molecules and solids where AFQMC can be reliably performed.