cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The deforming bed beneath a surge-type glacier : measurement of mechanical and electrical properties
Creators: name: Blake, Eric Weston
Publisher: name: University of British Columbia
Year: 2008

description: Glacier surging is a flow instability characterized by short periods of rapid glacier flow separating longer periods of normal flow. It is accepted that sustained high subglacial water pressure causes glacier surging by decoupling the glacier from its bed, but how this high subglacial water pressure is developed and sustained is the subject of debate. The current focus of glaciological research is on the interaction of subglacial processes with the subglacial drainage system. We have developed new investigative techniques for exploring two subglacial processes: basal deformation and electrical phenomena. These techniques have been applied in research undertaken on Trapridge Glacier, a small surge-type glacier in the St. Elias Mountains, Yukon, Canada; these are the first in situ measurements of deformation, electrical resistivity, and streaming potentials beneath a surge-type glacier. The development of a reliable rheological description of subglacial material required field observations of its stress—strain response; this was the motivation for our subglacial deformation experiments. We have demonstrated that no clear relationship exists between values of shear stress and effective pressure calculated using accepted methods and deformation rate; the absence of an expected relationship suggests that alternate methods for quantifying subglacial shear stress and effective pressure need to be found. Data from our subglacial electrical resistivity measurements and from the deformation measurements provide strong evidence that the distribution of normal and shear loading at the glacier bed is not even and that subglacial deformation rates can be affected by distant changes in subglacial pressure conditions. We have also observed temporal changes in electrical flow paths within subglacial sediments. We have shown that temporal variations in natural potential observed beneath Trapridge Glacier are caused by streaming potentials; streaming potentials result from cross-coupling between fluid flow and electric currents. Our data suggest that inexpensive subglacial electrode arrays may be used to supplement pressure sensors.
Impurity scattering in superconductors revisited
Creators: name: Yang, F.
name: Wu, M. W.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The diagrammatic formalism and transport equation are conventionally considered as separate but complementary techniques to tackle the impurity scattering effect. To compare with the previous studies from the gauge-invariant kinetic equation approach [F. Yang and M. W. Wu, Phys. Rev. B 98, 094507 (2018); 102, 144508 (2020)], we analytically perform a diagrammatic formulation of the impurity scattering in superconductors, with both transport and collective Higgs mode studied, in order to fill the long missing calculation of the Kubo current-current correlation in superconductors with impurity scattering and resolve the controversy (whether the impurity scattering can lead to the damping of Higgs mode) between gauge-invariant kinetic equation and Eilenberger equation. For transport behavior, through a special unitary transformation that is equivalent to the Wilson-line technique for the diamagnetic response, we derive the Meissner-supercurrent vertex. Then, by formulating the supercurrent-supercurrent correlation with Born and vertex corrections from impurity scattering, we recover the previously revealed microscopic momentum-relaxation rate of superfluid by gauge-invariant kinetic equation. This rate is finite only when the superconducting velocity is larger than a threshold, at which the normal fluid emerges and causes the friction with the superfluid current, similar to the Landau's superfluid theory of liquid helium. This derivation also provides a physical understanding of the relaxation-time approximation in the previous diagrammatic formulation in the literature, which leads to the friction resistance of the Meissner supercurrent. For the collective Higgs mode, we calculate the amplitude-amplitude correlation with Born and vertex corrections from impurity scattering. The vertex correction, which only emerges at nonequilibrium case, leads to a Higgs-mode damping, ......
description: 17 pages, 2 figures
Investigation of Multiple Resource Theory Design Principles on Robot Teleoperation and Workload Management
Creators: name: Han, Zhao
name: Norton, Adam
name: McCann, Eric
name: Baraniecki, Lisa
name: Ober, Will
name: Shane, Dave
name: Skinner, Anna
name: Yanco, Holly A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Robot interfaces often only use the visual channel. Inspired by Wickens' Multiple Resource Theory, we investigated if the addition of audio elements would reduce cognitive workload and improve performance. Specifically, we designed a search and threat-defusal task (primary) with a memory test task (secondary). Eleven participants - predominantly first responders - were recruited to control a robot to clear all threats in a combination of four conditions of primary and secondary tasks in visual and auditory channels. We did not find any statistically significant differences in performance or workload across subjects, making it questionable that Multiple Resource Theory could shorten longer-term task completion time and reduce workload. Our results suggest that considering individual differences for splitting interface modalities across multiple channels requires further investigation.
description: 7 pages, 13 figures, ICRA 2021
title: Σύνολα Birkhoff-James ε-Ορθογωνιότητας και Αριθμητικά Πεδία
titleType: AlternativeTitle
Creators: name: Chorianopoulos, Christos S.
Publisher: name: National Technological University of Athens
Year: 2011
Subjects: Πίνακας
Αριθμητικά πεδία πινάκων
Πολυωνυμικός πίνακας
Ορθογωνιότητα
Birkhoff-James Oρθογωνιότητα
Matrix
Numerical range of a matrix
Matrix polynomial
Ortogonality
Birkhoff-James ortogonality

description: 102 σ.
description: Στην παρούσα διδακτορική διατριβή γενικεύουμε την έννοια του αριθμητικού πεδίου τετραγωνικών πινάκων στους όχι κατ' ανάγκη τετραγωνικούς πίνακες. Στη συνέχεια συνδέουμε τον νέο ορισμό με την έννοια της Birkhoff-James ε-ορθογωνιότητας και οριζουμε τα σύνολα Birkhoff-James ε-ορθογωνιότητας για όχι κατ' ανάγκη τετραγωνικούς πίνακες και μελετάμε σε βάθος τις ιδιότητες των συνόλων αυτών. Επιπλέον μεταφέρουμε την έννοια του συνόλου Birkhoff-James ε-ορθογωνιότητας και στην περίπτωση των πολυωνυμικών πινάκων, όχι κατ' ανάγκη τετραγωνικών, και για τα σύνολα αυτά αποδεικνείουμε βασικές ιδιότητες και σχολιάζουμε τον τρόπο με τον οποίο συνδέονται με το κλασικό αριθμητικό πεδίο τετραγωνικού πολυωνυμικού πίνακα. Τέλος στα πλαίσια της διατριβής παρουσιάζουμε και έναν αλγόριθμο για την επίλυση ενός αντιστρόφου προβλήματος για το κλασικό αριθμητικό πεδίο τετραγωνικού πίνακα.
description: In this thesis we generalize the notion of the numerical range of a square matrix in the case of rectangular matrices. In the sequel we make a connection between the new definition and the notion of the Birkhoff-James ε-orthogonality and we define the Birkhoff-James ε-orthogonality sets for rectangular matrices and we study these set's properties. Moreover, we bring the notion of the Birkhoff-James ε-orthogonality set to the case of rectangular matrix polynomials, and we prove basic properties for these sets while making comments about the way they combine and generalize the clasic numerical range of square matrix polynomials. Finally, we present an algorithm for solving an inverse problem concering the clasic numerical range of a square matrix.
Additional file 5: of Heterologous expression and biochemical characterization of a GHF9 endoglucanase from the termite Reticulitermes speratus in Pichia pastoris
Creators: name: Zhang, Pengfei
name: Yuan, Xianghua
name: Du, Yuguang
name: Li, Jian-Jun
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Evolutionary Biology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology

description: Western blot analysis of overexpressed pJL36C induced for 72Â h. (DOCX 249Â kb)
Topological Magnetic Hysteresis in Single Crystals of CeAgSb2 Ferromagnet
Creators: name: Prozorov, Ruslan
name: Bud'ko, Sergey L.
name: Canfield, Paul C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Closed-topology magnetic domains are usually observed in thin films and in an applied magnetic field. Here we report the observation of rectangular cross-section tubular ferromagnetic domains in thick single crystals of CeAgSb2 in zero applied field. Relatively low exchange energy, small net magnetic moment, and anisotropic in-plane crystal electric fields lower the domain wall energy and allow for the formation of the closed-topology patterns. Upon cycling the magnetic field, the domain structure irreversibly transforms into a dendritic open-topology pattern. This transition between closed and open topologies results in a "topological magnetic hysteresis" - the actual hysteresis in magnetization, not due to the imperfections and pinning, but due to the difference in the pattern morphology. Similar physics was suggested before in pure type-I superconductors and is believed to be a generic feature of other nonlinear multi-phase systems in the clean limit.
An electromagnetic physics constructor for low energy polarised X-/gamma ray transport in Geant4
Creators: name: Brown, Jeremy M. C.
name: Dimmock, Matthew R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The production, application, and/or measurement of polarised X-/gamma rays are key to the fields of synchrotron science and X-/gamma-ray astronomy. The design, development and optimisation of experimental equipment utilised in these fields typically relies on the use of Monte Carlo radiation transport modelling toolkits such as Geant4. In this work the Geant4 "G4LowEPPhysics" electromagnetic physics constructor has been reconfigured to offer a "best set" of electromagnetic physics models for studies exploring the transport of low energy polarised X-/gamma rays. An overview of the physics models implemented in "G4LowEPPhysics", and it's experimental validation against Compton X-ray polarimetry measurements of the BL38B1 beamline at the SPring-8 synchrotron (Sayo, Japan) is reported. "G4LowEPPhysics" is shown to be able to reproduce the experimental results obtained at the BL38B1 beamline (SPring-8) to within a level of accuracy on the same order as Geant4's X-/gamma ray interaction cross-sectional data uncertainty (approximately $\pm$ 5 \%).
description: Geant4, Polarized gamma ray, Compton scattering, X-ray astronomy, Gamma-ray astronomy, Synchrotron radiation facility
A theoretical treatment of microscopic phenomena in porous rocks
Creators: name: Endres, Anthony Lee
Publisher: name: University of British Columbia
Year: 2008

description: This thesis makes five significant contributions to the theoretical analysis of the connection between microscopic phenomena and the macroscopic physical properties of porous rocks. A random sphere packing model permitting contact generation during hydrostatic compression is derived. It is demonstrated that the closure of near-contact gaps with an extremely small mean width significantly alters the elastic properties of granular media from those predicted by previous models in the pressure range used in laboratory measurements. Generalized forms of the inclusion-based formulations are obtained; major classes of these formulations are defined according to the manner in which interactions between inclusions in the heterogeneous system are simulated. Each class possesses an associated microstructure that determines the topological relationship between the various components. Inclusion-based formulations are obtained that describe the effects of pore-scale fluid distribution on the dielectric and elastic responses of a partially saturated rock. It is found that the pore fluid configuration within the individual pores and the pore geometries in which saturation conditions are varying are critical factors in determining the dielectric and elastic properties of partially saturated rocks. In addition, it is observed that the effect of saturation condition variations in a particular pore geometry increases as the pore shape becomes more crack-like. The theoretical formulations describing the effects of pore-scale fluid distribution are used to analyze experimental data for a partially saturated tight gas sandstone and glass bead packing. Simple models that incorporate only the basic geometrical elements of the resulting pore-scale fluid distributions accurately predict the experimental data. It is also found that the same geometrical model can be used simultaneously to estimate the dielectric and elastic responses of a partially saturated porous medium. The effect of surface phenomena (e.g. electrical double layers and surface conduction) at the solid-fluid interface are incorporated into inclusion-based formulations of the dielectric response by employing the limiting case of a confocally-layered ellipsoid. It is found that the effect of surface phenomena varies as a function of both inclusion size and shape.
Two Examples of Circular Motion for Introductory Courses in Relativity
Creators: name: Wortel, Stephanie
name: Malin, Shimon
name: Semon, Mark
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Classical Physics (physics.class-ph)
subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: The circular twin paradox and Thomas Precession are presented in a way that makes both accessible to students in introductory relativity courses. Both are discussed by examining what happens during travel around a polygon and then in the limit as the polygon tends to a circle. Since relativistic predictions based on these examples can be verified in experiments with macroscopic objects such as atomic clocks and the gyroscopes on Gravity Probe B, they are particularly convincing to introductory students.
description: Accepted by the American Journal of Physics This version includes revisions
Dynamical Equilibrium States of a Class of Irrotational Non-Orthogonally Transitive $G_{2}$ Cosmologies I: The Conjecture of Chaotic Cosmological Inhomogeneity
Creators: name: Hewitt, C. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The Einstein field equations for a class of irrotational non-orthogonally transitive $G_{2}$ cosmologies are written down as a system of partial differential equations. The equilibrium points are self-similar and can be written as a one-parameter, five-dimensional, ordinary differential equation. The corresponding cosmological models both evolve and have one-dimension of inhomogeneity. The major mathematical features of this ordinary differential equation are derived, and a cosmological interpretation is given. The relationship to the exceptional Bianchi models is explained and exploited to provide a conjecture about future generalizations.
description: Only change is added reference to companion paper arxiv.org:2103.16428
On Planetary Orbits in Entropic Gravity
Creators: name: Pérez-Cuéllar, G.
name: Sabido, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Starting with an entropy that includes volumetric, area and length terms as well as logarithmic contributions, we derive the corresponding modified Newtonian gravity and derive the expression for planetary orbits. We calculate the shift of the perihelion of Mercury to find bounds to the parameters associated to the modified Newtonian gravity. We compare the parameter associated to the volumetric contribution in the entropy-area relationship with the value derived for galactic rotation curves and the value obtained from the cosmological constant.
description: 14 pages, no figures
Μοντελοποίηση διεργασιών και ιδιοτήτων μεταλλικών αφρών
Creators: name: Κωνσταντινίδης, Ιωάννης Χρ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Μηχανικές ιδιότητες
Θερμικές ιδιότητες
Πεπερασμένα στοιχεία
Mechanical properties
Thermal properties
Finite elements

description: Στην συγκεκριμένη διατριβή έγινε μια προσπάθεια δημιουργίας θεωρητικών μοντέλων για τον προσδιορισμό των μηχανικών και θερμικών ιδιοτήτων των μεταλλικών αφρών αλουμινίου. Χρησιμοποιήθηκαν τρισδιάστατες περιοδικές διατάξεις κελιών. Η επίλυση των παραπάνω μοντέλων έγινε με πεπερασμένα στοιχεία. Τα αποτελέσματα που ελήφθησαν συγκρίθηκαν με πειραματικά καθώς και με άλλα θεωρητικά μοντέλα άλλων ερευνητών. Υπήρξε πολύ καλή συμφωνία θεωρητικών και πειραματικών αποτελεσμάτων
description: In the current research study various theoretical models were introduced in order to define al metal foams properties. Three dimensional periodical cell structures were used and finite element method was applied for the solution of the models. Results were compared to the experimental ones. There was a very good agreement between theoretical and experimental results
IMPACT ON BRAND TRUST AND CONSUMER BEHAVIOR: LEVERAGING SOCIAL MEDIA INFLUENCERS TO DRIVE CREDIBILITY AND ENGAGEMENT ACROSS INDUSTRIES
Creators: name: Mbonigaba Celestin* & S. Sujatha**
Publisher: name: Zenodo
Year: 2024

description: The research on Influencer Marketing explores its impact on brand trust and consumer behavior, examining how businesses leverage social media influencers to enhance credibility and engagement. The study involved a mixed-methods approach, combining quantitative surveys of 1,000 consumers and qualitative interviews with 50 businesses. Results showed that 92% of consumers trust influencer recommendations over traditional advertising, and influencer campaigns led to a 24% increase in brand credibility and a 37% higher purchase intent compared to conventional methods. However, 78% of marketers struggle to measure the return on investment (ROI). The study concludes that influencer marketing is a growing industry, projected to reach $15 billion by 2024, and emphasizes the need for advanced tools to measure long-term impact.
Δίκτυα ανταλλαγής της κεραμικής κατά τη Mέση και Nεότερη Nεολιθική στη Θεσσαλία
Creators: name: Πεντεδέκα, Αρετή Σ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Κεραμική τεχνολογία
Πετρογραφική ανάλυση
Pottery technology
Petrographic analysis

description: Στοχεύοντας στην αναγνώριση δικτύων ανταλλαγής στις κατηγορίες της κόκκινης μονόχρωμης, της ξεστής, της μαύρης στιλβωμένης, της τεφρής και της αμαυρόχρωμης κεραμικής, αναλύθηκαν με πετρογραφική ανάλυση 480 δείγματα κεραμικής της Μέσης και Νεότερης Νεολιθικής από 12 νεολιθικούς οικισμούς της Θεσσαλίας (Σπήλαιο Θεόπετρας, Πλατιά Μαγούλα Ζάρκου, Μακρυχώρι 2, Αγία Σοφία, Οτζάκι, Αράπη, Χάλκη 1, Σέσκλο, Τσαγγλί, Αχίλλειο, Οργόζινος, Μαγούλα Συκεών). Διαπιστώθηκε διακίνηση όλων των κεραμικών κατηγοριών, κυρίως όμως της τεφρής, της μαύρης στιλβωμένης και της ξεστής κεραμικής, ενώ στα δίκτυα ανταλλαγής που αναγνωρίστηκαν σημαντικό, αν και διαφορετικό, ρόλο διαδραμάτιζαν οι οικισμοί Πλατιά Μαγούλα Ζάρκου, Οτζάκι, Μακρυχώρι 2, Τσαγγλί και Χάλκη 1
description: In order to shed light on networks of pottery exchange during Middle and Late Neolithic in Thessaly, petrographic analysis was applied on 480 samples of red monochrome, scraped, black burnished, grey and matt-painted wares from 12 excavated sites (Theopetra Cave, Platia Magoula Zarkou, Makrychori 2, Agia Sophia, Otzaki, Arapi, Halki 1, Sesklo, Tsaggli, Achilleion, Orgozinos, Magoula Sykeon). Circulation of all pottery wares was detected, with particular emphasis on grey, black burnished and scraped pottery, while Platia Magoula Zarkou, Otzaki, Makrychori 2, Tsaggli and Halki 1 proved to play an important, though different, role in the identified exchange networks
Studies of the ATLAS Muon spectrometer with testbeam and simulated physics data
Creators: name: Μπαχάς, Κωνσταντίνος Ι.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Απώλεια ενέργειας
Μιόνια
Catastrophic energy loss
Muon

description: Στην παρούσα διατριβή μελετάται η ικανότητα ανακατασκευής τροχιών ενός θαλάμου μιονίων ΒΙS σε μια πειραματική διάταξη στη δέσμη ελέγχου Η8 στο CERN με δεδομένα από δέσμες μιονίων και ποζιτρονίων. Επίσης μελετώνται οι προσδοκίες παρατήρησ του καναλιού pp->ZZ->4l και περιγράφονται οι μέθοδοι ανάλυσης σε γεγονότα από προσομοίωση του σήματος και από τα κύρια κανάλια υποβάθρου tt και zbb
description: The reconstruction potential of a BIS type motivated drift tube chamber in a special set up at the H8 testbeam experimental area at CERN is studied. Data come from both muon and positron beams. Finally the Z boson pair production through the process pp->ZZ->llll is under investigated and analysis methods an simulated events of signal and tt and zbb backgrounds are described
Duality and exact correlations for a model of heat conduction
Creators: name: Giardiná, C.
name: Kurchan, J.
name: Redig, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study a model of heat conduction with stochastic diffusion of energy. We obtain a dual particle process which describes the evolution of all the correlation functions. An exact expression for the covariance of the energy exhibits long-range correlations in the presence of a current. We discuss the formal connection of this model with the simple symmetric exclusion process.
description: 19 pages
title: Ecological Associations of Nonnative Ungulates on the Hawaiian Island of Lāna‘i
Creators: name: Hess, Steven C
name: Berio Fortini, Lucas
name: Leopold, Christina R.
name: Muise, Jacob
name: Sprague, Jonathan C.
Publisher: name: Utah State University
Year: 2023

description: Abstract: Sustained-yield hunting of introduced ungulates in the Hawaiian Islands often conflicts with the conservation of native species, but there is little reliable data to guide effective management. European mouflon sheep (Ovis musimon; mouflon) and axis deer (Axis axis; deer) were introduced on the island of Lāna‘i to provide additional hunting opportunities. Managers will require better information regarding the ecological associations of introduced ungulate species, relative to the habitats occupied, to resolve longstanding conflicts between native species conservation and sustained-yield hunting on islands. To address this information need, we modeled sheep and deer ecological associations, habitat-use, and suitability using data obtained from an intensive aerial survey completed in 2013 and temporally matching environmental data. In habitat suitability models evaluated by Receiver Operating Characteristic (ROC) metrics, predictor importance in a generalized linear model (GLM) of deer decreased in the following order: afternoon cloud cover, topographic slope, mean annual precipitation (MAP), elevation, normalized difference vegetation index (NDVI), and bare soil index. In a random GLM model of mouflon, predictor importance decreased in the following order: afternoon cloud cover, deer habitat suitability, NDVI, bare soil index, topographic slope, elevation, and MAP. Mouflon were restricted to lower elevation arid slopes, whereas deer were more broadly distributed throughout upland environments of the island. The presence of deer was also an important predictor for mouflon distribution, although mouflon was not an important predictor of deer, suggesting asymmetrical competition. Removal of the more abundant deer population may lead to an increase in abundance and distribution of mouflon without containment. This work represents the first habitat suitability analysis for all nonnative ungulates on any entire Hawaiian island. Our results are applicable to other islands where conflicts may arise with introduced ungulates, sustained-yield hunting, and native species conservation.
Optimal Generation of Pulsed Entangled Photon Pairs
Creators: name: Hodelin, Juan F.
name: Khoury, George
name: Bouwmeester, Dirk
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We experimentally investigate a double-pass parametric down-conversion scheme for producing pulsed, polarization-entangled photon pairs with high visibility. The amplitudes for creating photon pairs on each pass interfere to compensate for distinguishing characteristics that normally degrade two-photon visibility. The result is a high-flux source of polarization-entangled photon pulses that does not require spectral filtering. We observe quantum interference visibility of over 95% without the use of spectral filters for 200 femtosecond pulses, and up to 98.1% with 5 nm bandwidth filters.
description: 8 pages, 6 figures
Automating repository workflows with Orpheus, an Open Source database of journals and publishers
Creators: name: Sartori, Andre
Publisher: name: Apollo - University of Cambridge Repository
Year: 2019

description: Repository management relies on knowledge of numerous attributes of academic journals, such as revenue model (subscription, hybrid or fully Open Access), self-archiving policies, licences, contacts for queries and article processing charges (APCs). While datasets collating some of this information are helpful to repository administrators, most cover only one or few of those attributes (e.g., APC price lists from publishers), do not provide APIs or their API responses are not machine readable (self-archiving policies from RoMEO), or are not updated very often (licences and APCs from DOAJ). As a result, most repositories still rely on administrative staff looking up and entering required attributes manually. To solve this problem and increase automation of tasks performed by the Cambridge repository team, I developed Orpheus, a database of academic journals/publishers written in Django. Orpheus was recently integrated with our DSpace repository Apollo and auxiliary systems via its RESTful API, enabling embargo periods to be automatically applied to deposited articles and streamlining the process of advising researchers on payments, licences and compliance to funders' Open Access policies. Orpheus is Open Source (https://github.com/osc-cam/orpheus) and may be easily expanded or tailored to meet the particular needs of other repositories and Scholarly Communication services.
Ιστορική γεωγραφία και εθνικές διεκδικήσεις των ελλήνων τον 19ο αιώνα
Creators: name: Πλατής, Βασίλειος Αθ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Εδαφικές διεκδικήσεις
Ορια "Ελλάδος"
Ελληνικός 'αλυτρωτισμός'
Territorial claims
Borders of "Greece"
Greek Irredentism

description: Στην διδακτορική διατριβή ερευνήθηκε η χρήση του "παρελθόντος" από Ελληνες λόγιους του 19ου αιώνα, προκειμένου οι τελευταίοι να τεκμηριώσουν ιστoρικά επιχειρήματα για την ελληνικότητα των βορείων του πρώτου ελληνικού κράτους ιστορικών χωρών, της Μακεδονίας, της Ηπείρου και της Θράκης. Στην αναζήτηση επιχειρημάτων αναφορικά με την εθνογραφία των κατοίκων των περιοχών αυτών στην αρχαιότητα που να επιβεβαιώνουν την αρχή prior tempore, frontior iure(όσο αρχαιότερη αποδεικνυόταν η παρουσία των Ελλήνων στις χώρες αυτές, τόσο ισχυρότερες ήταν οι διεκδικήσεις τους στη διάρκεια του 19ου αιώνα) κατέφυγαν τοπικοί στην πλειονότητά τους λόγιοι-λ.χ. ο Δήμιτσας στη Μακεδονία, ο Αραβαντινός στην Ηπειρο, ο Σκορδέλης, στη Θράκη-κυρίως μετά την εμφάνιση του πανσλαβισμού. Η εργασία πραγματεύεται επίσης το ζήτημα των βορείων συνόρων της "Ελλάδος" του 19ου αιώνα καθώς και την εικόνα της Μακεδονίας, της Ηπείρου και της Θράκης μέσα από το πρίσμα ευρωπαίων λόγιων της εποχής που διακρίνονταν για τη γνώση της ιστορικής γεωγραφίας των παραπάνω χωρών
description: In the doctoral thesis titled "Historical geography and national claims of the greek people in the 19th century" has benn searched how the greek scholars during the 19th century used the 'past', in order to argue historical arguments for the greek character of Macedonia, Epirus and Thrace. To the search of arguments in regard to the ethnography of residents of these countries in the antiquity, that would confirm the principle 'prior tempore, fortior iure'(the more ancient was proved the presence of the greek people in these countries, the more powerful became their territorial claims during the 19th century), resorted mainly local scholars-e.g. Dimitsa in Macedonia, Aravantinos in Epirus, Skordelis in Thrace-afterwards the appearance of panslavism. The dissertation was also dealt with the question of the northern borders of "Greece" in the 19th century as well as the way Macedonia, Epirus and Thrace were depicted in the works of European scholars distinguished for their knowledge of historical geography of the above countries
Self-organised quantum dots in marginally twisted MoSe$_2$/WSe$_2$ and MoS$_2$/WS$_2$ bilayers
Creators: name: Enaldiev, V. V.
name: Ferreira, F.
name: McHugh, J. G.
name: Fal'ko, V. I.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Moiré superlattices in twistronic heterostructures are a powerful tool for materials engineering. In marginally twisted (small misalignment angle, $θ$) bilayers of nearly lattice-matched two-dimensional (2D) crystals moiré patterns take the form of domains of commensurate stacking, separated by a network of domain walls (NoDW) with strain hot spots at the NoDW nodes. Here, we show that, for type-II transition metal dichalcogenide bilayers MoX$_2$/WX$_2$ (X=S, Se), the hydrostatic strain component in these hot spots creates quantum dots for electrons and holes. We investigate the electron/hole states bound by such objects, discussing their manifestations via the intralayer intraband infrared transitions. The electron/hole confinement, which is strongest for $θ<0.5^{\circ}$, leads to a red-shift of their recombination line producing single photon emitters (SPE) broadly tuneable around 1\,eV by misalignment angle. These self-organised dots can form in bilayers with both aligned and inverted MoX$_2$ and WX$_2$ unit cells, emitting photons with different polarizations. We also find that the hot spots of strain reduce the intralayer MoX$_2$ A-exciton energy, enabling selective population of the quantum dot states.
Transcription of story about Verdena's house fire
Creators: name: Parker, Verdena
name: Lee-Wynant, Tyler
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio file VP-200918-04: transcribing story about a fire that destroyed Verdena's house when she and her family moved to Oregon, file VP-090812-02 from 15:23.
Hadronic decays from the lattice
Creators: name: Michael, Chris
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: I review the lattice QCD approach to determining hadronic decay transitions. Examples considered include rho to pi pi; b_1 to pi omega; hybrid meson decays and scalar meson decays. I discuss what lattices can provide to help understand the composition of hadrons.
description: 6 pages, presented at QNP06, June 2006
Μελέτη των κυτταρικών στόχων του παράγοντα νέκρωσης των όγκων(TNFa) σε ζωικά πρότυπα φλεγμονώδους πολυαρθρίτιδας
Creators: name: Αρμακά, Μαρία Π.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Ζωικά πρότυπα
Διαγονιδιακά ζώα
Κλωνοποίηση
Transgenic animals
Murine animal models
Molecular cloning

description: Ο ΤΝF θεωρείται ότι παίζει κεντρικό ρόλο στην ανάπτυξη της Ρευματοειδούς Αρθρίτιδας και οι αντί-TNF θεραπείες είναι πράγματι ικανοποιητικά επιτυχείς για την καταστολή της. Παρ' όλα αυτά, οι συγκεκριμένοι μοριακοί και κυτταρικοί μηχανισμοί μέσω των οποίων ο TNF γίνεται παθογόνος στην αρθρίτιδα, παραμένουν άγνωστοι. Στο παρελθόν η ερευνητική ομάδα του Δρ Γ. Κόλλια δημιούργησε μία διαγονιδιακή σειρά, την Tg197, με διαγονίδιο τον TNF του ανθρώπου, στο οποίο είχε αντικατασταθεί η 3' περιοχή του γονιδίου με την αντίστοιχη περιοχή του ανθρώπινου γονιδίου της β-σφαιρίνης, και μία μεταλλαγμένη σειρά ποντικών, την TNFΔARE, που παρουσιάζει κατασκευασμένη έλλειψη των ΑU-στοιχείων στην 3' περιοχή του mRNA του TNF. Η 3' περιοχή του TNF γονιδίου ελέγχει την σταθερότητα του αγγελιοφόρου RNA και την ποσοτική παραγωγή της πρωτεΐνης. Και στους δύο ποντικούς εμφανίζεται απορυθμισμένη έκφραση του TNF, με αποτέλεσμα την ανάπτυξη χρόνιας φλεγμονώδους πολυαρθρίτιδας. Ο TNFΔARE ποντικός αναπτύσσει άλλη μία φλεγμoνώδη παθολογία, μια εντεροπάθεια που προσομοιάζει την νόσο του Crohn. Επιπλέον, προηγούμενες μελέτες έχουν αμφισβητήσει την κρισιμότητα του ρόλου των Τ και Β κυττάρων στην ανάπτυξη και την εξέλιξη της πολυαρθρίτιδας, αφού η έλλειψή τους και στα δυο πειραματικά πρότυπα οδήγησε σε αρθριτικό φαινότυπο στα ίδια χρονικά πλαίσια και με την ίδια δριμύτητα
description: TNF plays an essential pathogenic role in Rheumatoid Arthritis, and anti-TNF therapies are successful in attenuation of the disease. However, the molecular and cellular mechanisms through which TNF becomes pathogenic are still unknown. In the past we generated a mutant mouse that develops chronic inflammatory polyarthritis and inflammatory bowel's disease (crohn's-like) (TNFΔARE mouse) as a result of a targeted endogenous deletion of the AU-rich elements (ARE), which regulate TNF gene expression and the human TNF transgenic mouse (Tg197). The latest has been generated by the microinjection of the human TNF gene in which 3' prime UTR had been replaced with the respective region of human β-globin gene. The backcrossing of the mouse models in mature T and B cells deficient background resulted in arthritic pathology which was very similar to the pathology of the original models, in terms of time course and severity
Ανάπτυξη μεθοδολογίας για την εκτίμηση και διαχείρισης της επικινδυνότητας κατά την οδική μεταφορά επικίνδυνων εμπορευμάτων σύμφωνα με την αρχή της προφύλαξης της Ευρωπαϊκής Ενωσης
Creators: name: Βαγιόκας, Νικόλαος Δ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Ανάλυση κόστους ωφελειών
Κοινωνική διακινδύνευση
Αρχή της προφύλαξης
Cost benefit analysis
Precautionary principle
Societal risk

description: Η παρούσα διδακτορική διατριβή πραγματεύεται την ανάπτυξη ενός μεθοδολογικού πλαισίου για την εκτίμηση και διαχείριση των κινδύνων που εμπεριέχονται κατά τη μεταφορά επικίνδυνων εμπορευμάτων οδικώς, σύμφωνα με τις κατευθυντήριες οδηγίες της Ευρωπαϊκής Ενωσης μέσα από την Αρχή της Προφύλαξης. Η μεθοδολογία εκτίμησης της επικινδυνότητας περιλαμβάνει τέσσερα στάδια α)εντοπισμός των πηγών κινδύνου, β)χαρακτηρισμός των πηγών κινδύνου, γ)αξιολόγηση της έκθεσης του πληθυσμού και δ)χαρακτηρισμός επικινδυνότητας. Η μεθοδολογία διαχείρισης της επικινδυνότητας βασίζεται στην ανάλυση κόστους ωφελειών για τον καθορισμό του κριτηρίου ALARP(τόσο χαμηλά όσο πρακτικά εφικτό)
description: The present doctoral thesis deals with the development of a methodological framework for assessing and managing risks involved during transportation of dangerous goods by road, according to the guidelines of Precautionary Principle given by European Union. The risk assessment methodology consists of four steps : a)hazard identification, b)hazard characterization, c)assessment of exposure and d)risk characterization. The risk management methodology is based on the cost benefit analysis in order to determine the ALARP criterion(as low as reasonably practicable)
Αποτελεσματικότητα και φορολογικό δίκαιο στο πλαίσιο της περιορισμένης ορθολογικότητας των φορολογούμενων
Creators: name: Προκοπίδης, Χριστόφορος Π.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Φοροδιαφυγή
Οικονομική ανάλυση
Θεωρία παιγνίων
Γνωστική θεωρία
Economic analysis
Game theory
Cognitive theory
Bounded rationality

description: Σε αυτή τη διατριβή ο συγγραφέας απορρίπτει τη θεωρία της ορθολογικότητας ως μια μη ρεαλιστική προσέγγιση των φορολογικών συστημάτων στον πραγματικό κόσμο και υιοθετεί την περιορισμένη ορθολογικότητα, ώστε να διαμορφώσει ένα σύνθετο μοντέλο μελέτης της φορολογικής συμπεριφοράς. Σε αυτή τη διεπιστημονική προσπάθεια, συνδυάζονται διάφορα πεδία των κοινωνικών επιστημών για να μεγιστοποιηθεί η αποτελεσματικότητα του φορολογικού συστήματος. Τα φορολογικά πειράματα είναι σημαντικά ως εμπειρικό υλικό. Ιδιαίτερη προσοχή δίνεται στο ρόλο του νομοθέτη, των φορολογικών αρχών και των φορολογικών δικαστηρίων καθώς και στη φοροδιαφυγή
description: In this thesis the author rejects rational choice theory as an unrealistic approach to real world tax systems and adopts bounded rationality in order to form a complex model to study tax behavior.In this interdisciplinary effort, various fields of social sciences are combined so as to maximize efficiency in the tax system.Tax experiments are critical as empirical evidence. Special attention is paid to the role of the legislator, the tax authorities and the tax courts as well as to tax evasion
Δημοσιογραφικός λόγος και διακειμενικότητα
Creators: name: Γιαλαμπούκη, Ελένη Ε.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Κριτική ανάλυση του λόγου
Αναπαράσταση του λόγου
Πολυφωνία
Polyphony
Jounalistic discourse
Power relations

description: Η παρούσα εργασία πραγματεύεται την πολυφωνία του δημοσιογραφικού λόγου. Με αφετηρία την έννοια της διακειμενικότητας, όπως αυτή διαμορφώνεται στο πλαίσιο της κριτικής ανάλυσης του λόγου, επιχειρείται μια κριτική προσέγγιση του τρόπου με τον οποίον ο/η δημοσιογράφος οργανώνει και διαχειρίζεται στην λόγο τους/της τον λόγο άλλων φωνών. Στόχος της εργασίας είναι να διερευνήσει τι συνεπάγεται η οργάνωση και διαχείριση αυτής της πολυφωνίας για την ιδεολογική λειτουργία του δημοσιογραφικού λόγου και τη συμβολή του στην αναπαραγωγή σχέσεων εξουσίας, μέσα από μια σφαιρική θεώρηση του φαινομένου της αναπαράστασης του λόγου. Η ανάλυση οργανώνεται γύρω από τέσσερις άξονες 1)τις πηγές και τον τρόπο αναπαράστασής του, 2)το αντικείμενο της αναπαράστασης και τους ενδείκτες με τους οποίους εισάγεται, 3)τους τρόπους και τις μορφές αναπαράστασης και 4)τις λειτουργίες της αναπάράστασςη του λόγου. Από την ανάλυση προκύπτει ότι, μολονότι η πολυφωνία αποτελεί βασικό χαρακτηριστικό του δημοσιογραφικού λόγου, ο τρόπος με τον οποίον ο/η δημοσιογράφος τη δοαχειρίζεται και την αξιοποιεί έχει ως αποτέλεσμα την προβολή και προώθηση της οπτικής κοινωνικά ισχυρών φωνών και ταυτόχρονα, την περιθωριοποίηση των θέσεων και απόψεων φωνών που στερούνται κύρους και εξουσίας. Με αυτόν τον τρόπο, η δημοσιογραφική πρακτική συμβάλλει στην αναπαραγωγή της ανισοκατανομής της εξουσίας
description: The present study discusses the polyphonic construction of journalistic discrource. Based on the notion of intertextyality, as it is developed in the fremawork of critical discourse analysis, the study critically examines thw ways in which the discourse of others is organized and utilized by the journalist. Through a comprehensive examination of discourse bepresentation, it aims at investigating the ideological consequences of this 'orchestration' of voices and its contribution to the reproduction of power relations. The analysis is organized around four axes 1)sources and their representation, 2)the object of representation and means with which it is introduced, 3)the modes and forms of representation, 4)the functions of discourse bepresentation. The analysis shows that, although polyphony is a characteristic traiti of journalist results in the promotion of dominant representations of the world and social reality and, simultaneously, in the marginalization of the views of the socially powerless. Thus, it is concluded, journalistic practice contibutes to the reproduction of power relations
Unlocking the Origin of Compositional Fluctuations in InGaN Light Emitting Diodes
Creators: name: Mishra, Tara P.
name: Syaranamual, Govindo J.
name: Deng, Zeyu
name: Chung, Jing Yang
name: Zhang, Li
name: Goodman, Sarah A
name: Jones, Lewys
name: Bosman, Michel
name: Gradečak, Silvija
name: Pennycook, Stephen J.
name: Canepa, Pieremanuele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The accurate determination of the compositional fluctuations is pivotal in understanding their role in the reduction of efficiency in high indium content $In_{x}Ga_{1-x}N$ light-emitting diodes, the origin of which is still poorly understood. Here we have combined electron energy loss spectroscopy (EELS) imaging at sub-nanometer resolution with multiscale computational models to obtain a statistical distribution of the compositional fluctuations in $In_{x}Ga_{1-x}N$ quantum wells (QWs). Employing a multiscale computational model, we show the tendency of intrinsic compositional fluctuation in $In_{x}Ga_{1-x}N$ QWs at different Indium concentration and in the presence of strain. We have developed a systematic formalism based on the autonomous detection of compositional fluctuation in observed and simulated EELS maps. We have shown a direct comparison between the computationally predicted and experimentally observed compositional fluctuations. We have found that although a random alloy model captures the distribution of compositional fluctuations in relatively low In ($\sim$ 18%) content $In_{x}Ga_{1-x}N$ QWs, there exists a striking deviation from the model in higher In content ($\geq$ 24%) QWs. Our results highlight a distinct behavior in carrier localization driven by compositional fluctuations in the low and high In-content InGaN QWs, which would ultimately affect the performance of LEDs. Furthermore, our robust computational and atomic characterization method can be widely applied to study materials in which nanoscale compositional fluctuations play a significant role on the material performance.
description: 38 pages, 5 Figures
An Open-Source Gaussian Beamlet Decomposition Tool for Modeling Astronomical Telescopes
Creators: name: Ashcraft, Jaren N.
name: Douglas, Ewan S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In the pursuit of directly imaging exoplanets, the high-contrast imaging community has developed a multitude of tools to simulate the performance of coronagraphs on segmented-aperture telescopes. As the scale of the telescope increases and science cases move toward shorter wavelengths, the required physical optics propagation to optimize high-contrast imaging instruments becomes computationally prohibitive. Gaussian Beamlet Decomposition (GBD) is an alternative method of physical optics propagation that decomposes an arbitrary wavefront into paraxial rays. These rays can be propagated expeditiously using ABCD matrices, and converted into their corresponding Gaussian beamlets to accurately model physical optics phenomena without the need of diffraction integrals. The GBD technique has seen recent development and implementation in commercial software (e.g. FRED, CODE V, ASAP) but appears to lack an open-source platform. We present a new GBD tool developed in Python to model physical optics phenomena, with the goal of alleviating the computational burden for modeling complex apertures, many-element systems, and introducing the capacity to model misalignment errors. This study demonstrates the synergy of the geometrical and physical regimes of optics utilized by the GBD technique, and is motivated by the need for advancing open-source physical optics propagators for segmented-aperture telescope coronagraph design and analysis. This work illustrates GBD with Poisson's spot calculations and show significant runtime advantage of GBD over Fresnel propagators for many-element systems.
description: 13 pages, 9 figures, submitted to SPIE Astronomical Telescopes & Instrumentation 2020
Orientation gradients in rapidly solidified pure aluminum thin films: comparison of experiments and phase-field crystal simulations
Creators: name: Jreidini, Paul
name: Pinomaa, Tatu
name: Wiezorek, Jörg M. K.
name: McKeown, Joseph T.
name: Laukkanen, Anssi
name: Provatas, Nikolas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Rapid solidification experiments on thin film aluminum samples reveal the presence of lattice orientation gradients within crystallizing grains. To study this phenomenon, a single-component phase-field crystal (PFC) model that captures the properties of solid, liquid, and vapor phases is proposed to model pure aluminium quantitatively. A coarse-grained amplitude representation of this model is used to simulate solidification in samples approaching micrometer scales. The simulations reproduce the experimentally observed orientation gradients within crystallizing grains when grown at experimentally relevant rapid quenches. We propose a causal connection between formation of defects and orientation gradients.
On the Green's function and iterative solutions of Loop Quantum Cosmology
Creators: name: Shojai, Fatimah
name: Shojai, Ali
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Here we shall find the green's function of the difference equation of loop quantum cosmology. To illustrate how to use it, we shall obtain an iterative solution for closed model and evaluate its corresponding Bohmian trajectory.
description: To appear in General Relativity and Gravitation
Βιοχημικές και μεταβολικές προσαρμογές των δίθυρων Mytilus galloprovincialis και Modiolus barbatus στην αύξηση της θερμοκρασίας του περιβάλλοντος
Creators: name: Ανέστης, Ανδρέας Γ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Κλιματικές αλλαγές
Πρωτεϊνες θερμικού πλήγματος
Οικοφυσιολογία
Climate changes
Heat shock proteins
Ecophysiology

description: Σκοπός της παρούσας διατριβής ήταν η μελέτη των βιοχημικών και μεταβολικών αποκρίσεων των δίθυρων με διαφορετική κάθετη κατανομή στον Θερμαϊκό κόλπο της πριοχής της Θεσσαλονίκης στην αύξηση της θερμοκρασίας του θαλασσινού νερού καθώς και στην έκθεσή τους στον ατμοσφαιρικό αέρα. Ως πειραματόζωα χρησιμοποιήθηκαν τα δίθυρα Mytilus galloprovinciallis(εκτίθενται στον αέρα κατά την διάρκεια της παλίροιας) και Modiolus barbatus(σε βαθύτερα νερά, περισσότερο σταθερές συνθήκες θερμοκρασίας)
description: The aim of the present study was to determine the metabolic and biochemicalresponses of bivalves with different vertical distribution in Thermaikos Gulf to the elevated sea water temperature, as well as to their exposure to air. For this purpose Mytilus galloprovincialis (exposed to air during the tidal) and Modiolus barbatus (never exposed to air) were used. Especially, we studied the rate of mortality in both species, Hsp70 and Hsp90 expression, phosphorylation of MAPKs p-38 and JNK, which seem to be implicated in Hsps’ expression, enzymatic activity of glycolytic enzymes pyruvate kinase, aldolase, phosphofructokinase, hexokinase, phospho-glycerol-kinase andphosphoenol-pyruvate carboxykinase and the levels of Scope for Growth (SFG)The results of the present study show that M. galloprovincialis have anincreased mortality at sea water temperatures over 26C. However, also lowertemperatures seem to affect the duration of valve open and closure