cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Trace metal analysis and studies in chronic renal failure
Creators: name: Stevens., Brian J.M.
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
The SAMD Product Standard (Standardized Atmospheric Measurement Data)
Creators: name: Jahnke-Bornemann, Annika
Publisher: name: Universität Hamburg
Year: 2022
Subjects: SAMD
FESSTVaL
data

description: The SAMD light data-product description-document includes the conventions for file names, variables and NetCDF-files. The standardized XML-file convention is included as well as all necessary abbreviations for institutes, instruments, variables, etc.
description: {"references": ["Lammert, Andrea, Gr\u00fctzun, Verena, & Stamnas, Erasmia. (2018). The SAMD Product Standard (Standardized Atmospheric Measurement Data). Zenodo. https://doi.org/10.5281/zenodo.1741364", "re3data.org: SAMD; editing status 2021-07-14; re3data.org - Registry of Research Data Repositories. http://doi.org/10.17616/R3D944 last accessed: 2022-02-08"]}
Disorder effect on chiral edge modes and anomalous Hall conductance in Weyl semimetals
Creators: name: Takane, Yositake
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Typical Weyl semimetals host chiral surface states and hence show an anomalous Hall response. Although a Weyl semimetal phase is known to be robust against weak disorder, the influence of disorder on chiral states is not fully clarified so far. We study the behavior of such chiral states in the presence of disorder and its consequences on an anomalous Hall response, focusing on a thin slab of Weyl semimetal with chiral surface states along its edge. It is shown that weak disorder does not disrupt chiral edge states but crucially affects them owing to the renormalization of a mass parameter: the number of chiral edge states changes depending on the strength of disorder. It is also shown that the Hall conductance is quantized when the Fermi level is located near Weyl nodes within a finite-size gap. This quantization of the Hall conductance collapses once the strength of disorder exceeds a critical value, suggesting that it serves as a probe to distinguish a Weyl semimetal phase from a diffusive anomalous Hall metal phase.
description: 9 pages, 7 figures
title: Modelling Pulse Magnetic Welding Processes
title: An Empirical Approach
titleType: AlternativeTitle
Creators: name: Uhlmann, E.
name: Ziefle, A.
Publisher: name: Institut für Umformtechnik - Technische Universität Dortmund
Year: 2010
Subjects: subject: finite element method (FEM)
subject: parameter controlled bonding
subject: pulse magnetic welding
subject: 620
subject: 670

description: In recent years pulse magnetic welding technology gained an ever increasing attention. The process was known for over 40 years, yet the poor knowledge of process parameters as well as the difficulties concerning the calculability of the process due to lack of adequate software, performance and appropriate material models hindered the application of the technology. In the past, some simulations treating the process of explosive welding were conducted. There, the assumption was made to define a friction condition to the boundary regions which was reasonable due to similar conditions in the collision region during the process. However, at pulse magnetic welding processes, the contact forces are highly transient and have big gradients over the geometry. In this paper a new empirical approach is presented, which gives the possibility of modelling the welding process by parameter-controlled bonding at the welding interface. The pulse magnetic forming process was simulated by loose coupling of electromagnetic and mechanical FEM software with the commercial code ANSYS. As geometry the joining of a duct with an internally positioned conical bolt was chosen. The material used for both duct and bolt was EN AW 6063. First of all the influences of heat generation were analyzed. Therefore, the additional thermal simulation was coupled with the electromagnetic and the mechanical simulation. The heat generation caused by the plastic deformation was considered. As the resulting temperatures were below the melting temperature of the material, further simulations were carried out without thermal simulation. In order to calibrate the welding model, a set of relevant parameters were defined. It included the cumulative plastic work, the plastic deformation in collision direction, the normal and the tangential components of the collision velocity and the collision angle between the two parts. By comparing the simulation with experiments carried out at the same specific process parameters, it was possible to reduce the set of parameters to the normal collision velocity and plastic deformation. Based on their distribution, the parameter control of the bonding condition could be adjusted. Further experiments gave a high accordance to the simulations carried out with the parameters found for this model.
Το υλεικονικό: έρευνα για την σχέση πραγματικού και εικονικού στη σύγχρονη συνθήκη
Creators: name: Μπέλλου, Μαρία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Εικονικό
Πραγματικό
Τεχνολογία
Virtual
Real
Technology

description: Η ψηφιακή τεχνολογία θέτει σήμερα με εντελώς νέους και πρωτότυπους όρους το ερώτημα της σχέσης ανάμεσα στο πραγματικό και το εικονικό. Με τον όρο πραγματικό εννοούμε εδώ μια «κατάσταση πραγμάτων» και όχι μια «υπόσταση», μια «ουσία», ένα «θεμέλιο» ή ένα «αντικείμενο της αίσθησης»: αυτή η εννοιολογική διευκρίνηση κρίνεται αναγκαία για να αποφύγουμε ουσιοκρατικές ή εμπειριοκρατικές θεωρητικές προκαταλήψεις. Σύμφωνα με μια διαδεδομένη αντίληψη το εικονικό αντιτίθεται στο πραγματικό. Πρόκειται για μια προσέγγιση η οποία βασίζεται στην ιδέα ότι το εικονικό ανήκει αποκλειστικά στην τάξη του φαινομένου. Εμείς παρόλα αυτά θα επιχειρήσουμε να εξετάσουμε τους ποικίλους τρόπους συσχετισμού του πραγματικού και του εικονικού με όρους μιας οντολογικής και γνωσιολογικής ισοτιμίας: η υπόθεσή μας είναι ότι το εικονικό δεν διακρίνεται από το πραγματικό όπως το ψευδές από το αληθές, αλλά μπορούμε να βρούμε στο εικονικό αλήθεια και ψεύδος όπως και στο πραγματικό. Με άλλα λόγια, η σχέση μεταξύ πραγματικού και εικονικού δεν υπακούει στη διαλεκτική της ουσίας και του φαινομένου, αλλά το εικονικό (μπορεί να) είναι εξίσου ουσιώδες με το πραγματικό, όπως και το πραγματικό (μπορεί να) είναι εξίσου φαινομενικό με το εικονικό.
description: Digital technology today raises the question of the relationship between the real and the virtual in completely new and original terms. By real we mean here a "state of affairs" and not a "being", a "substance", a "foundation" or an "object of the senses": this conceptual clarification is considered necessary in order to avoid substantialist or empirical theoretical prejudices. According to a widespread belief, the virtual is opposed to the real. This is an approach based on the idea that the virtual belongs exclusively to the order of the phenomena. We will nevertheless try to examine the various ways in which the real and the virtual are related in terms of an ontological and epistemological equivalence: our hypothesis is that the virtual is not distinguished from the real in the way the false is distinguished from the true, but we can find in the virtual truth and falsehood as in the real. In other words, the relationship between the real and the virtual is not determined by the dialectics of substance and phenomenon, but the virtual (can) be as essential as the real, just as the real (can) be as apparent as the virtual.
description: Σε συνεργασία με: Φιλοσοφίας, Παιδαγωγικής και Ψυχολογίας (Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών), Φιλοσοφικών και Κοινωνικών Σπουδών (Πανεπιστήμιο Κρήτης)
Viscous Hydrodynamics Simulations of Circumbinary Accretion Discs: Variability, Quasi-Steady State, and Angular Momentum Transfer
Creators: name: Miranda, Ryan
name: Muñoz, Diego
name: Lai, Dong
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We carry out numerical simulations of circumbinary discs, solving the viscous hydrodynamics equations on a polar grid covering an extended disc outside the binary co-orbital region. We use carefully controlled outer boundary conditions and long-term integrations to ensure that the disc reaches a quasi-steady state, in which the time-averaged mass accretion rate onto the binary, $\langle\dot{M}\rangle$, matches the mass supply rate at the outer disc. We focus on binaries with comparable masses and a wide range of eccentricities ($e_\mathrm{B}$). For $e_\mathrm{B} \lesssim 0.05$, the mass accretion rate of the binary is modulated at about $5$ times the binary period; otherwise it is modulated at the binary period. The inner part of the circumbinary disc ($r \lesssim 6 a_\mathrm{B}$) generally becomes coherently eccentric. For low and high $e_\mathrm{B}$, the disc line of apsides precesses around the binary, but for intermediate $e_\mathrm{B}$ ($0.2 - 0.4$), it instead becomes locked with that of the binary. By considering the balance of angular momentum transport through the disc by advection, viscous stress, and gravitational torque, we determine the time-averaged net angular momentum transfer rate to the binary, $\langle\dot{J}\rangle$. The specific angular momentum, $l_0 = \langle\dot{J}\rangle/\langle\dot{M}\rangle$, depends non-monotonically on $e_\mathrm{B}$. Contrary to previous claims, we find that $l_0$ is positive for most $e_\mathrm{B}$, implying that the binary receives net angular momentum, which may cause its separation to grow with time. The minimum $l_0$ occurs at intermediate $e_\mathrm{B}$ ($0.2 - 0.4$), corresponding to the regime where the inner eccentric disc is apsidally aligned with the binary.
description: 24 pages, 20 figures, accepted for publication in MNRAS
Nonlocal basis pursuit: Nonlocal optimal design of conductive domains in the vanishing material limit
Creators: name: Evgrafov, Anton
name: Bellido, José C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 49J21, 49J45, 49J35, 80M50

description: We consider the problem of optimal distribution of a limited amount of conductive material in systems governed by local and non-local scalar diffusion laws. Of particular interest for these problems is the study of the limiting case, which appears when the amount of available material is driven to zero. Such a limiting process is of both theoretical and practical interest and continues to be a subject of active study. In the local case, the limiting optimization problem is convex and has a well understood basis pursuit structure. Still this local problem is quite challenging both analytically and numerically because it is posed in the space of vector-valued Radon measures. With this in mind we focus on identifying the vanishing material limit for the corresponding nonlocal optimal design problem. Similarly to the local case, the resulting nonlocal problem is convex and has the basis pursuit structure in terms of nonlocal antisymmetric two-point fluxes. In stark contrast with the local case, the nonlocal problem admits solutions in Lebesgue spaces with mixed exponents. When the nonlocal interaction horizon is driven to zero, the "vanishing material limit" nonlocal problems provide a one-sided estimate for the corresponding local measure-valued optimal design problem. The surprising fact is that in order to transform the one-sided estimate into a true limiting process it is sufficient to disregard the antisymmetry requirement on the two point fluxes. This result relies on duality and requires generalizing some of the well known nonlocal characterizations of Sobolev spaces to the case of mixed Lebesgue exponents.
Refined Characterization of Lattice Chern Insulators by Bulk Entanglement Spectrum
Creators: name: Chiou, Dah-Wei
name: Kao, Hsien-Chung
name: Lin, Feng-Li
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have studied extensively the band crossing patterns of the bulk entanglement spectrum (BES) for various lattice Chern insulators. We find that only partitions with dual symmetry can have either stable nodal-lines or nodal-points in the BES when the system is in the topological phase of a nonzero Chern number. By deforming the Hamiltonian to lift the accidental symmetry, one can see that only nodal points are robust. They thus should bear certain topological characteristics of the BES. By studying the band crossing patterns in details we conclude that the topological characteristics of the BES are inherited from the topological order of the underlying Chern insulators and the former can have more refined topological structures. We then propose the conjecture that the sum of the vorticities in the BES in a properly chosen reduced Brillouin zone equals the Chern number of the underlying Chern insulator. This relation is beyond the usual classification scheme of topological insulators/superconductors.
description: 19 pages, 32 figures; v3: revised with various improvements, version to appear in PRB
An approach to directly probe simultaneity
Creators: name: Kipreos, Edward T.
name: Balachandran, Riju S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The theory of special relativity derives from the Lorentz transformation. The Lorentz transformation implies differential simultaneity and light speed isotropy. Experiments to probe differential simultaneity should be able to distinguish the Lorentz transformation from a kinematically-similar alternate transformation that predicts absolute simultaneity, the absolute Lorentz transformation. Here, we describe how published optical tests of light speed isotropy/anisotropy cannot distinguish between the two transformations. We show that the shared equations of the two transformations, from the perspective of the "stationary" observer, are sufficient to predict null results in optical resonator experiments and in tests of frequency changes in one-way light paths. In an influential 1910 exposition on differential simultaneity, Comstock described how a "stationary" observer would observe different clock readings for spatially-separated "moving" clocks. The difference in clock readings is an integral aspect of differential simultaneity. We derive the equation for the difference in clock readings and show that it is equivalent to the Sagnac correction that describes light speed anisotropies in satellite communications. We describe an experimental strategy that can measure the differences in spatially-separated clock times to allow a direct probe of the nature of simultaneity.
description: 19 pages, 4 figures. Published in Mod. Phys. Lett. A
The SAMD Product Standard (Standardized Atmospheric Measurement Data)
Creators: name: Jahnke-Bornemann, Annika
Publisher: name: Universität Hamburg
Year: 2022
Subjects: SAMD
FESSTVaL
data
standard
measurement
FAIR

description: The SAMD light data-product description-document includes the conventions for file names, variables and NetCDF-files. The standardized XML-file convention is included as well as all necessary abbreviations for institutes, instruments, variables, etc.
description: {"references": ["Lammert, Andrea, Gr\u00fctzun, Verena, & Stamnas, Erasmia. (2018). The SAMD Product Standard (Standardized Atmospheric Measurement Data). Zenodo. https://doi.org/10.5281/zenodo.1741364", "re3data.org: SAMD; editing status 2022-07-12; re3data.org - Registry of Research Data Repositories. http://doi.org/10.17616/R3D944 last accessed: 2022-08-18"]}
Ο σχεδιασμός του Instagram και η σημασία του για τον πολυτροπικό διάλογο: η περίπτωση της «Στέγης» του Ιδρύματος Ωνάση
Creators: name: Νησσοπούλου, Πασχαλίνα-Αναστασία Σταύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Σημειωτική
Μέσα κοινωνικής δικτύωσης
Πολυτροπικός διάλογος
Semiotics
Social media
Multimodal dialogue

description: Αντικείμενο της παρούσας εργασίας είναι η σημειωτική ανάλυση της εταιρικής επικοινωνίας στο ψηφιακό περιβάλλον και ειδικότερα σε ένα από τα σύγχρονα μέσα κοινωνικής δικτύωσης, όπου λαμβάνει χώρα, το instagram, με ειδική αναφορά στη συνεισφορά της τεχνολογικής διεπαφής στην εν λόγω επικοινωνία και μελέτη περίπτωσης τον λογαριασμό της Στέγης του Ιδρύματος Ωνάση. Πρόκειται για μια ποιοτική ανάλυση ενός σώματος δημοσιεύσεων / κινήσεων έναρξης διαλόγου από τον εταιρικό λογαριασμό που διατηρεί η Στέγη στη συγκεκριμένη πλατφόρμα κοινωνικής δικτύωσης, με βάση τα εργαλεία της σημειωτικής και των σπουδών επικοινωνίας. Σκοπός της εργασίας είναι κατά πρώτον η μελέτη της τεχνολογίας του μέσου ως σημειωτικής τεχνολογίας και της συνεισφοράς του στην ψηφιακή επικοινωνία, μέσα από τον προσδιορισμό του τρόπου με τον οποίο η σχεδίαση του ψηφιακού περιβάλλοντος του μέσου συμβάλλει στον πολυσημειωτικό, πολυτροπικό διάλογο που αναπτύσσει στο πλαίσιό του ο εν λόγω λογαριασμός, ώστε να επικοινωνεί με το υφιστάμενο κοινό του και να προσελκύει νέο. Κατά δεύτερον εξετάζεται ο εμπορικός-προωθητικός χαρακτήρας των κινήσεων έναρξης της Στέγης, των οποίων το περιεχόμενο επιδιώκει να προκαλέσει έναν διάλογο μέσα από θετικές ή αρνητικές αντιδράσεις των χρηστών στις πολιτισμικές αξίες που προβάλλει, και το κοινωνικό αποτύπωμα του επικοινωνιακού φαινομένου.
description: The topic of the present thesis is the semiotic analysis of corporate communication in digital environment and in particular in one of the modern social media platforms, in which takes place, on Instagram. Special emphasis is given to the contribution of the technological interface to this dialogic process, with a case study of the action of Onassis Stegi's Instagram account. This is a qualitative study including a body of published content / initiating moves from Stegi’s corporate account and following a semiotic and communication-studies direction. The initial purpose of this thesis is to study the specific medium’s technology as semiotic technology and its contribution in digital communication by identifying the way in which the platform’s design cooperates to the resulting multisemiotic, multimodal dialog in this framework, while the corporate account interacts with its existing audience and longs to attract new ones. Moreover, the commercial nature of Stegi’s initiating moves is being examined, the content of which pursues to provoke dialogue through positive or negative user reactions to the cultural values that are on focus, along with highlighting the social impact which is relevant to this phenomenon. Key-words: instagram, Onassis Stegi, affordances, semiotics, social media, multimodal semiotics, semiotic technology.
D-branes from Pure Spinor Superstring in AdS_5 x S^5 Background
Creators: name: Hanazawa, Sota
name: Sakaguchi, Makoto
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine the surface term for the BRST transformation of the open pure spinor superstring in an AdS_5 x S^5 background. We find that the boundary condition to eliminate the surface term leads to a classification of possible configurations of 1/2 supersymmetric D-branes.
description: 19 pages. A paragraph and references added in section 5, published version
A study of N-(pyridyl)-2-thiophenecarboxamides and related compounds
Creators: name: Stebbins., Melissa G.
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
The Contribution of Community based Inovative Program & Female Development Army on Basic Maternal health care Utilization in arada sub city, addis ababa
Creators: name: Sisay, Ashagre
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: Introduction; maternal mortality in Ethiopia is the highest in the world. According to the 2011 DHS the maternal mortality ratio was 676/100,000 live birth. It is believed that almost more than 90% of these death are preventable through the provision of basic maternal care. But due to many factors like socioeconomic inequalities and other cultural reasons, the vast majority of mothers were unable to access the basic care they need during maternity. Most of economically poor countries advised community based strategy to improve service quality and use Objective; to assess the effect of community based innovative program addressing socio-economic inequalities on the basic maternal health care utilization, 2016 Method; this study employed cross-sectional descriptive community based study that were done in Arada sub city of Addis Ababa. 599 women's were selected at random using simple random sampling. Interviewer administered structured questionnaire was used as data collection instrument. Assessment was done on the three basic maternal health care service that have higher impact on maternal mortality. The significant contribution of the innovative programs on addressing inequalities on service utilization was also done through document review in addition to the interview. Logistic regression model was used in the multivariate analysis. Result: the result showed 92% of the respondent had four ANC visits, 98% of them had facility based delivery and 73% had their PNC visits within 24 hrs after delivery. Socio demographic factors like education, age at first marriage, parity, occupation and economy were found to affect the utilization of the basic service. The logistic regression showed that the basic tasks of community based innovative programs had strong association with the utilization of the basic care. Conclusion & recommendation: both socio-demographic factors & community based innovative programs were significantly associated with the basic MHC utilization. The contribution of the program found to be more significant among mothers from the lower wealth quantile. To improve utilization of the basic maternal health care services and the challenges it faces as a result of the socioeconomic inequalities in the different segment of the HHs, a community based health strategies should be implemented
A new hierarchy of upper and lower bounds on expectation values
Creators: name: Stolze, Joachim
name: Brandt, Uwe
Publisher: name: Springer-Verlag
Year: 1981
Subjects: subject: 510

description: Upper and lower bounds are constructed for expectation values of functions of a real random variable with derivatives up to orderN+1 which are alternately negative and positive over the whole range of interest. The bounds are given by quadrature formulas with weights and abscissas determined by the firstN+1 moments of the underlying probability distribution. Application to a simple disordered phonon system yields sharp bounds on the specific heat.
Continuously tunable pulsed Ti:Sa laser self-seeded by an extended grating cavity
Creators: name: Li, Ruohong
name: Lassen, Jens
name: Rothe, Sebastian
name: Teigelhöfer, Andrea
name: Mostamand, Maryam
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A continuously tunable titanium:sapphire (Ti:Sa) laser self-seeded by an extended grating cavity was demonstrated and characterized. By inserting a partially reflecting mirror inside the cavity of a classic single-cavity grating laser, two oscillators are created: a broadband power oscillator, and a narrowband oscillator with a prism beam expander and a diffraction grating in Littrow configuration. By coupling the grating cavity oscillation into the power oscillator, a power-enhanced narrow-linewidth laser oscillation is achieved. Compared to the classic grating laser, this simple modification significantly increases the laser output power without considerably broadening the linewidth. With most of the oscillating laser power confined inside the broadband power cavity and lower power incident onto the grating, the new configuration also allows higher pump power, which is typically limited by the thermal deformation of the grating coating at high oscillation power.
description: 7 pages, 6 figures
Indirect phase detection of NMR spinor transitions
Creators: name: Suter, Dieter
name: Pines, A.
name: Mehring, M.
Publisher: name: The American Physical Society
Year: 1986
Subjects: subject: 530

description: The behavior of quantum mechanical state functions under selective rotations is discussed. If a two-level transition is phase shifted with composite z pulses, the component state function shared with a connected transition can be multiplied by i, thereby shifting the corresponding coherence into an orthogonal channel. Application to the sensitive indirect detection of NMR transitions is demonstrated.
Three-dimensional lattice ground states for Riesz and Lennard-Jones type energies
Creators: name: Bétermin, Laurent
name: Šamaj, Ladislav
name: Travěnec, Igor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 74G65, 70G75, 74N05

description: The Riesz potential $f_s(r)=r^{-s}$ is known to be an important building block of many interactions, including Lennard-Jones type potentials $f_{n,m}^{\rm{LJ}}(r):=a r^{-n}-b r^{-m}$, $n>m$ that are widely used in Molecular Simulations. In this paper, we investigate analytically and numerically the minimizers among three-dimensional lattices of Riesz and Lennard-Jones energies. We discuss the minimality of the Body-Centred-Cubic lattice (BCC), Face-Centred-Cubic lattice (FCC), Simple Hexagonal lattices (SH) and Hexagonal Close-Packing structure (HCP), globally and at fixed density. In the Riesz case, new evidence of the global minimality at fixed density of the BCC lattice is shown for $s<0$ and the HCP lattice is computed to have higher energy than the FCC (for $s>3/2$) and BCC (for $s<3/2$) lattices. In the Lennard-Jones case with exponents $3
description: 20 pages, 9 figures. Version accepted for publication in Studied in Applied Mathematics
Discovery of hard phase lags in the pulsed emission of GRO J1744-28
Creators: name: D'Aì, Antonino
name: Burderi, Luciano
name: Di Salvo, Tiziana
name: Iaria, Rosario
name: Pintore, Fabio
name: Riggio, Alessandro
name: Sanna, Andrea
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the discovery and energy dependence of hard phase lags in the 2.14 Hz pulsed profiles of GRO J1744-28. We used data from XMM-Newton and NuSTAR. We were able to well constrain the lag spectrum with respect to the softest (0.3--2.3 keV) band: the delay shows increasing lag values reaching a maximum delay of $\sim$ 12 ms, between 6 and 6.4 keV. After this maximum, the value of the hard lag drops to 7 ms, followed by a recovery to a plateau at 9 ms for energies above 8 keV. NuSTAR data confirm this trend up to 30 keV, but the measurements are statistically poorer, and therefore, less constraining. The lag-energy pattern up to the discontinuity is well described by a logarithmic function. Assuming this is due to a Compton reverberation mechanism, we derive a size for the Compton cloud $R_{\rm{cc}}$ $\sim$ 120 $R_{\rm g}$, consistent with previous estimates on the magnetospheric radius. In this scenario, the sharp discontinuity at $\sim$ 6.5 keV appears difficult to interpret and suggests the possible influence of the reflected component in this energy range. We therefore propose the possible coexistence of both Compton and disk reverberation to explain the scale of the lags and its energy dependence.
description: Accepted for publication in MNRAS Letters on 2016 June 01
Theoretical insights into electronic nematic order, bond-charge orders, and plasmons in cuprate superconductors
Creators: name: Yamase, Hiroyuki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this article, we focus on the charge degree of freedom in cuprate superconductors and review theoretical insights into the electronic nematic order, bond-charge orders, and plasmons. The low-energy charge dynamics is controlled by the spin-spin interaction J, which generates various bond-charge ordering tendencies including the electronic nematic order. The nematic order is driven by a d-wave Pomeranchuk instability and is pronounced in the underdoped region as well as around van Hove filling in the hole-doped case; the nematic tendency is weak in the electron-doped region. Nematicity consistent with the d-wave Pomeranchuk instability was reported for hole-doped cuprates in various experiments. Although the t-J and Hubbard models correctly predicted the proximity to the nematic instability in cuprates far before the experimental indications were obtained, full understanding of the charge ordering tendencies in hole-doped cuprates still requires further theoretical studies. In electron-doped cuprates, on the other hand, the d-wave bond-charge excitations around momentum q=(0.5pi,0) explain the resonant x-ray scattering data very well. Plasmon excitations are also present and the agreement between the large-N theory of the t-J model and resonant inelastic x-ray scattering measurements is nearly quantitative in both hole- and electron-doped cuprates. Theoretically the charge dynamics in cuprates is summarized as a dual structure in energy space: the low-energy region scaled by J, where the nematic and various bond-charge orders are relevant, and the high-energy region typically larger than J, where plasmons are predominant.
description: 38 pages, 14 figures, concise review article
title: Ιστορική Εκπαίδευση και Τεχνολογίες της Πληροφορίας και Επικοινωνίας
title: Ιστορική Εκπαίδευση και Τεχνολογίες της Πληροφορίας και Επικοινωνίας
Creators: name: Repoussi, Maria
name: Mavrommati, Maria
name: Makaratzis, Georgios
Publisher: name: Kallipos, Open Academic Editions
Year: 2023
Subjects: Διδακτική της ιστορίας
Ψηφιακή ιστορία
Κινητή ιστορία
Didactics of History
Digital history
Mobile history

description: Το σύγγραμμα στοχεύει στην εκπαίδευση των φοιτητών/τριών αρχικά του Παιδαγωγικού Τμήματος Δημοτικής Εκπαίδευσης του ΑΠΘ αλλά και φοιτητών/τριών των Φιλοσοφικών Σχολών ...
description: Το σύγγραμμα στοχεύει στην εκπαίδευση των φοιτητών/τριών αρχικά του Παιδαγωγικού Τμήματος Δημοτικής Εκπαίδευσης του ΑΠΘ αλλά και φοιτητών/τριών των Φιλοσοφικών Σχολών ...
Aspects of functional brain imaging using positron emission tomography
Creators: name: Sritharan., Anusha
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Spreading and vanishing in a West Nile virus model with expanding fronts
Creators: name: Tarboush, Abdelrazig K.
name: Lin, Zhigui
name: Zhang, Mengyun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper, we study a simplified version of a West Nile virus model discussed by Lewis et al. [28], which was considered as a first approximation for the spatial spread of WNv. The basic reproduction number $R_0$ for the non-spatial epidemic model is defined and a threshold parameter $R_0 ^D$ for the corresponding problem with null Dirichlet boundary condition is introduced. We consider a free boundary problem with coupled system, which describes the diffusion of birds by a PDE and the movement of mosquitoes by a ODE. The risk index $R_0^F (t)$ associated with the disease in spatial setting is represented. Sufficient conditions for the WNv to eradicate or to spread are given. The asymptotic behavior of the solution to system when the spreading occurs are considered. It is shown that the initial number of infected populations, the diffusion rate of birds and the length of initial habitat exhibit important impacts on the vanishing or spreading of the virus. Numerical simulations are presented to illustrate the analytical results.
description: 28 pages, 4 figures. It has been accepted for publication in SCIENCE CHINA Mathematics
A new unfolding method for the MAGIC telescope
Creators: name: Curtef, Valentin
Publisher: name: Technische Universität Dortmund
Year: 2008
Subjects: subject: Entfaltung
subject: aktive galaktische Kerne
subject: Astrophysik
subject: 530

description: The presented thesis describes an unfolding method whose principle is to determine the probability that a certain set of events has a certain range of energy. Unfolding methods are not related to the analyzed data and one is interested in the extent to which the unfolding solution encapsulates the unfolding variables in the data. For this purpose, new factors have been defined. These factors enable the use of the unfolding methods for obtaining information about the unfolding variables in the data, independent of the unfolding solutions. Amongst others, this information determines whether the unfolding variables exist in the data after applying standard (analysis) cuts or additional ones. This opens the way to study the effects of different cuts on the data and how they will change the content of the unfolding variables in the data. Additionally, the unfolding method is applied to three special AGN: Markarian 421, Markarian 501 and PKS 2155304. The obtained spectra follow the results of already established methods, and in most of the cases (Markarian 501 and PKS 2155304) the spectra could be extended to higher and/or lower energies.
Daft-Exprt: Cross-Speaker Prosody Transfer on Any Text for Expressive Speech Synthesis
Creators: name: Zaïdi, Julian
name: Seuté, Hugo
name: van Niekerk, Benjamin
name: Carbonneau, Marc-André
Publisher: name: arXiv
Year: 2021
Subjects: subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents Daft-Exprt, a multi-speaker acoustic model advancing the state-of-the-art for cross-speaker prosody transfer on any text. This is one of the most challenging, and rarely directly addressed, task in speech synthesis, especially for highly expressive data. Daft-Exprt uses FiLM conditioning layers to strategically inject different prosodic information in all parts of the architecture. The model explicitly encodes traditional low-level prosody features such as pitch, loudness and duration, but also higher level prosodic information that helps generating convincing voices in highly expressive styles. Speaker identity and prosodic information are disentangled through an adversarial training strategy that enables accurate prosody transfer across speakers. Experimental results show that Daft-Exprt significantly outperforms strong baselines on inter-text cross-speaker prosody transfer tasks, while yielding naturalness comparable to state-of-the-art expressive models. Moreover, results indicate that the model discards speaker identity information from the prosody representation, and consistently generate speech with the desired voice. We publicly release our code and provide speech samples from our experiments.
description: Submitted to Interspeech 2022, 5 pages, 5 figures, 2 tables
Ψηφιακή αφήγηση και εκπαίδευση: Η περίπτωση του παραμυθιού
Creators: name: Λαμπροπούλου, Βάια Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Οπτικοακουστική Παραγωγή Παραμυθιού
Ψηφιακή αφήγηση
Πολυμέσα
Audiovisual Production of a Fairy Tale
Digital storytelling
Multimedia

description: Η παρούσα εργασία στοχεύει στην ανάλυση και κατανόηση της έννοιας της ψηφιακής αφήγησης, καθώς και στην πρακτική εφαρμογή της μέσω της περίπτωσης του παραμυθιού. Προκειμένου να αναλυθεί το ζήτημα αυτό, παρουσιάζονται τα κύρια χαρακτηριστικά της ψηφιακής εποχής και ο ρόλος που διαδραματίζουν οι Τεχνολογίες Πληροφορίας και Επικοινωνίας (ΤΠΕ) στην εκπαίδευση. Επιπλέον, γίνεται σχολιασμός των ευρύτερων θεωριών μάθησης, έτσι ώστε να γίνει εμφανές το πλαίσιο που υποβοηθά η ψηφιακή αφήγηση την εκπαίδευση. Εν συνεχεία, δίνεται έμφαση συγκεκριμένα στην μετάβαση από την παραδοσιακή στην ψηφιακή αφήγηση. Εδώ, γίνεται λόγος για τους τύπους αφήγησης και τα στοιχεία που την απαρτίζουν, ενώ ακόμη αναφέρονται τα πλεονεκτήματα και τα μειονεκτήματά της για την διδασκαλία.Παρουσιάζονται παράλληλα και τα εργαλεία που μπορεί να αξιοποιήσει ο εκπαιδευτικός μαζί με τους ενδεδειγμένους τρόπους εφαρμογής τους στην σχολική τάξη. Κατόπιν, δίνεται έμφαση στο μεθοδολογικό και σχεδιαστικό μέρος της εργασίας. Πιο αναλυτικά, αναφέρονται οι διαδικασίες ανάπτυξης μιας πολυμεσικής εφαρμογής καθώς και οι φάσεις υλοποίησης της ιστοσελίδας Digital Fairytales. Στόχος αυτής της ιστοσελίδας, που αποτελεί προϊόν της διατριβής, είναι η επαφή και διάδραση των χρηστών με ψηφιακά παραμύθια. Τέλος, διατυπώνονται τα γενικά συμπεράσματα της εργασίας, καθώς και η καινοτομία του παρόντος εγχειρήματος μαζί με προτάσεις για μελλοντική έρευνα και εφαρμογή.
description: The present work aims at the analysis and understanding of the concept of digital storytelling, as well as its practical application through the case of the fairy tale. In order to analyze this issue, the main characteristics of the digital age are presented along with the role of Information and Communication Technologies (ICT) in education. In addition, the broader theories of learning are commented on, so that the context in which digital storytelling helps education becomes apparent. Then, emphasis is specifically given on the transition from traditional to digital narration. The types and the elements of digital storytelling are presented, point out advantages and disadvantages for teaching. Also, basic tools that the teacher can use in the classroom are given, along with the recommended ways of their utilization. Then, the focus concerns the methodological and design part of the dissertation. More specifically, the multimedia application design and development processes ra presented, along with the implementation phases of the Digital Fairytales website. This site, which has been produced within the dissertation, aims at contacting and engaging users with digital fairytales. Finally, the general conclusions of the work are underlined, pointing out the innovative aspects of the present project along with suggestions for future research and implementation.
Η περί τόκων και τοκιζόντων , βυζαντινή παράδοση κατά τον 12 αιώνα στην Θεσσαλονίκη
Creators: name: Μπέρτος, Ιωάννης Ανδρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Τόκοι-Τόκος
Ευστράτιος
Χρήμα-Θρησκεία- Εκκλησία
Interest - Interesting
Efstathios Episkopos (Bishop) Thessaloniki
Money – Religion- Church

description: Ο τρόπος και η έκταση επιρροής της Ορθόδοξης πνευµατικότητας στα κοινωνικά και οικονοµικά δεδοµένα της εποχής του 12ου αι. αποτελεί ένα κοµβικό ζήτηµα που απασχολεί έντονα τους επιστήµονες της Ορθόδοξης Θεολογίας. Ο 12ος αιώνας προσέλκυσε το ενδιαφέρον µας από τα πρώτα στάδια των µεταπτυχιακών σπουδών, καθώς εντοπίσαµε µια σειρά στοιχείων του οικονοµικού και κοινωνικού βίου, τα οποία µε την βοήθεια του πρώτου πτυχίου, το οποίο ήταν στο Οικονοµικό Πανεπιστήµιο ΑΘηνών (ΑΣΟΕΕ), πιστεύαµε ότι θα είµασταν σε θέση να επεξεργαστούµε. Η βοήθεια που µας παρείχαν τα µαθήµατα που παρακολουθήσαµε κατά τη διάρκεια των σπουδών ήταν µεγάλη. Τόσο οι ιστορικές αναλύσεις, όσο και η κατανόηση των πνευµατικών επιδράσεων της Ορθόδοξης Εκκλησίας πάνω στη Βυζαντινή Κοινωνία, προσέλκυσαν το ενδιαφέρον και µας οδήγησαν σε συνεργασία µε τον Σύµβουλο καθηγητή κ. Χρήστο Αραµπατζή να εντρυφήσουµε, όσο µας ήταν δυνατόν, στο έργο του κυρίου εκφραστή της εκκλησιαστικής πρακτικής του 12ου στη Θεσσαλονίκη, Ευστάθιου Θεσσσαλονίκης
description: The manner and extent of the influence o Orthodox spirituality on social and economic data o thee 12th c. constitutes a key issue that is of great concern to Orthodox scholars of Theology. The 12th century attracted our interest from the earliest stages of postgraduate studies, as we identified a number of its elements, such as economic and social life, with the help of the former degree, which was the Athens Univerrsity of Economics and Business (ASOEE), we thought we would be able to process. The help they provided us with the lessons we attended during the duration of studies was long. Both the historical analyzes and the understandingof the spiritual influences of the Orthodox Church on Byzantine society, attracted interest and led us to collaboration with the Advisor Professor Mr. Christos Arabatzis to immerse ourselves, a much as possible, in the work of its main exponent ecclesiastical practice of the 12th in Thessaloniki, Efstathiou Thessaloniki
description: Σε συνεργασία με: Κοινωνικής Θεολογίας (Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών)
Ενεργειακοί Πόροι, Στρατηγικά Αγαθά και Γεωπολιτική μετά την COVID-19
Creators: name: Καϊλάρη, Χρυσάνθη Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Ενέργεια
Γεωπολιτική
Energy
Geopolitics
COVID-19

description: Στόχος της μεταπτυχιακής εργασίας είναι η μελέτη των γεωπολιτικών τάσεων μέσα από την σκοπιά της ενεργειακής γεωγραφίας. Εξετάζουμε τους όρους και τις προϋποθέσεις της ενεργειακής ασφάλειας, αλλά και τον τρόπο με τον οποίο η τελευταία συνδιαλέγεται και συνδιαμορφώνει τα γεωπολιτικά συστήματα. Στη συνέχεια, παρουσιάζουμε τα συστήματα πρωτογενούς και δευτερογενούς ενέργειας, εστιάζοντας σε τρία πολύ σημαντικά σύγχρονα γεωπολιτικά ζητήματα που περιπλέκονται περαιτέρω λόγω των ενεργειακών τους διαστάσεων. Ένα άλλο, μεγάλης σημασίας ζήτημα που θίγουμε είναι η σχέση αμοιβαίας ευπάθειας ανάμεσα στην ενέργεια και την οικονομία, με κεντρικό σημείο την ανάλυση της αγοράς πετρελαίου. Τέλος, ενεργειακή ασφάλεια, γεωπολιτική και οικονομία – όπως είναι χωρισμένα τα κεφάλαια της εργασίας – ενώνονται στον χρονοβόρο και κοστοβόρο δρόμο προς την ενεργειακή μετάβαση και τα δίκτυα, θέματα που αποτελούν τον τελευταίο σταθμό της παρούσας μελέτης
description: The aim of the present master's thesis is the study of geopolitical trends from the point of view of energy geography. We examine the terms and conditions of energy security, but also the way in which the latter negotiates and co-shapes geopolitical systems. Next, we present the primary and secondary energy systems, focusing on three very important contemporary geopolitical issues that are further complicated by their energy dimensions. Another very important issue that we raise is the relationship of mutual vulnerability between energy and the economy, with the central point being the analysis of the oil market. Finally, energy security, geopolitics and the economy - as the chapters of the thesis are separated - come together on the time-consuming and costly road to energy transition and grids, which are the last segments of this study
Multiple-change-point detection for high dimensional time series via sparsified binary segmentation
Creators: name: Cho, Haeran
name: Fryzlewicz, Piotr
Publisher: name: arXiv
Year: 2016
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Time series segmentation, a.k.a. multiple change-point detection, is a well-established problem. However, few solutions are designed specifically for high-dimensional situations. In this paper, our interest is in segmenting the second-order structure of a high-dimensional time series. In a generic step of a binary segmentation algorithm for multivariate time series, one natural solution is to combine CUSUM statistics obtained from local periodograms and cross-periodograms of the components of the input time series. However, the standard "maximum" and "average" methods for doing so often fail in high dimensions when, for example, the change-points are sparse across the panel or the CUSUM statistics are spuriously large. In this paper, we propose the Sparsified Binary Segmentation (SBS) algorithm which aggregates the CUSUM statistics by adding only those that pass a certain threshold. This "sparsifying" step reduces the impact of irrelevant, noisy contributions, which is particularly beneficial in high dimensions. In order to show the consistency of SBS, we introduce the multivariate Locally Stationary Wavelet model for time series, which is a separate contribution of this work.
Genesis of Palaeoproterozoic mafic-ultramafic intrusions and associated PGE-Cr and Ni-Cu-Co mineralisation in the east Kimberley, Western Australia
Creators: name: Sproule., Rebecca Ann
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.