cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Η τυπολογία της μουσειακής εκπαιδευτικής αξιολόγησης και η παρουσία της στις εκπαιδευτικές δράσεις των Ελληνικών Μουσείων
Creators: name: Καπελέρης, Κωνσταντίνος Παντελή
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Αξιολόγηση-Μουσείο
Μάθηση
Assessment-Museum
Learning

description: Αντικείμενο της διατριβής ήταν η μελέτη των διαδικασιών αξιολόγησης των εκπαιδευτικών δράσεων στα εγχώρια μουσεία. Ειδικότερα, ο σκοπός της μελέτης ήταν να διερευνηθεί σε ποιο βαθμό οι μέθοδοι αξιολόγησης που σχεδιάζονται για τις εκπαιδευτικές δράσεις των Ελληνικών Μουσείων είναι συμβατές με τις νέες θεωρίες για την εκπαιδευτική διάσταση του μουσείου και αν οι διδακτικοί αναχρονισμοί της τυπικής εκπαίδευσης «εισβάλλουν» στη μουσειακή εκπαίδευση στο πλαίσιο της ειδικής σχέσης που έχει αναπτυχθεί τα τελευταία χρόνια ανάμεσα στο σχολείο και το μουσείο. Αφού μελετήθηκε η διεθνής βιβλιογραφία για την διαχρονική εξέλιξη της μάθησης στο μουσείο, διενεργήθηκε ποσοτική έρευνα σε 52 εγχώρια μουσεία προκειμένου να διαπιστωθεί αν η αξιολόγηση κατέχει κεντρικό ή δευτερεύοντα ρόλο κατά την υλοποίηση των εκπαιδευτικών προγραμμάτων, τι αξιολογείται, ποιες μέθοδοι αξιοποιούνται και ποιοι παράγοντες δυσχεραίνουν η αναστέλλουν την υλοποίηση αξιολογικών παρεμβάσεων.
description: The main focus of our research was to study the procedures for assessing training activities in domestic museums. In particular, the purpose of the study was to investigate to what extent the evaluation methods designed for the educational activities of Greek Museums are compatible with the latest theories about the educational dimension of the museum and whether the instructive anachronisms of formal education "invade" in museum education on the basis of the special relationship that has developed between the school and the museum in recent years. After comprehending the international literature on the evolution of learning in the museum, a quantitative survey was conducted in 52 local museums in order to determine whether the assessment plays a pivotal or ancillary role in the implementation of educational programs, what is assessed, what methods are utilized and what factors hinder or even suspend assessment interventions.
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
Predicting bulge to total luminosity ratio of galaxies using deep learning
Creators: name: Grover, Harsh
name: Bait, Omkar
name: Wadadekar, Yogesh
name: Mishra, Preetish K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a deep learning model to predict the r-band bulge-to-total light ratio (B/T) of nearby galaxies using their multi-band JPEG images alone. Our Convolutional Neural Network (CNN) based regression model is trained on a large sample of galaxies with reliable decomposition into the bulge and disk components. The existing approaches to estimate the B/T use galaxy light-profile modelling to find the best fit. This method is computationally expensive, prohibitively so for large samples of galaxies, and requires a significant amount of human intervention. Machine learning models have the potential to overcome these shortcomings. In our CNN model, for a test set of 20000 galaxies, 85.7 per cent of the predicted B/T values have absolute error (AE) less than 0.1. We see further improvement to 87.5 per cent if, while testing, we only consider brighter galaxies (with r-band apparent magnitude < 17) with no bright neighbours. Our model estimates B/T for the 20000 test galaxies in less than a minute. This is a significant improvement in inference time from the conventional fitting pipelines, which manage around 2-3 estimates per minute. Thus, the proposed machine learning approach could potentially save a tremendous amount of time, effort and computational resources while predicting B/T reliably, particularly in the era of next-generation sky surveys such as the Legacy Survey of Space and Time (LSST) and the Euclid sky survey which will produce extremely large samples of galaxies.
description: 11 pages, 3 tables, 8 figures, accepted for publication in MNRAS
An imaging survey of a uniform sample of Brightest Cluster Galaxies and Intracluster Light
Creators: name: Patel, Parimal
name: Maddox, S.
name: Pearce, Frazer R.
name: Aragon-Salamanca, A.
name: Conway, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present deep, large area B and r' imaging for a sample of 49 brightest cluster galaxies (BCGs). The clusters were selected by their x-ray luminosity and redshift to form two volume limited samples, one with mean redshift ~ 0.07 and one at a mean redshift ~ 0.17. For each cluster the data cover 41' by 41'. We discuss our data reduction techniques in detail, and show that we can reliably measure the surface brightness at the levels of mu_B ~ 29 and mu_r' ~ 28. For each galaxy we present the B and r' images together with the surface brightness profile, B-r' colour, eccentricity and position angle as a function of radius. We investigate the distribution of positional offsets between the optical centroid of the BCG and the centre of the X-ray emission, and conclude that the mass profiles are cuspy, and do not have extended cores. We also introduce a method to objectively identify the transition from BCG to extended envelope of intra-cluster light, using the Petrosian index as a function of radius.
description: 36 pages, accepted for publication in MNRAS. This version does not contain the images and radial profiles - version with full resolution images can be found at http://www.nottingham.ac.uk/~ppxpp/
History, identity, and the marginalized: an analysis of selected works by Han Shaogong and Su Tong
Creators: name: Hinrichs, Noelle E.
Publisher: name: University of British Columbia
Year: 2008

description: Since Deng Xiaoping's liberalization of art and literature in 1977, literature in the People’s Republic of China has shown rapid development. While there are indisputably many sides to the "new" fiction of the Post-Mao era (1977 to present), the substance of the change can be summarized by saying that such works reflect an overall "return of the individual" to modern Chinese fiction, in terms of characterization, authorial style, and personal vision. This thesis examines the return of the individual from the specific angle of marginalized character and motif, since they are frequently used by contemporary writers to express an individual and often subversive perspective in fiction. The contemporary writers Han Shaogong and Su Tong both make use of marginalized character types and marginalized motifs in some of their key works. In the four texts presented here, "Ba, ba, ba" and "Three Women" by Han Shaogong, and "1934Escapes" and Rice by Su Tong, marginalized character and motif are used to explore and articulate authorial vision of history and identity in China. Each author defines their marginalized characters differently, yet there are basic similarities. Central characters in the four works are characterized by their social marginalization; all refer to aspects of human nature in general, and to the "Chinese nature" or cultural character in particular. Similarly, marginalized motif in each work underscores an alternative viewpoint. Regional discourse, myth, superstition, fallible narrators, and images of ostracism and alienation posit a challenge to the dominant ideologies and literary conventions of the last forty years of mainland Chinese literature. This analysis of the techniques of characterization, narration and imagery, illustrate show marginalized character and motif are defined in each work and how they are used to underscore theme and meaning. Despite the continued obsession with China, both authors manage to convey their emphasis on history and identity with a covert cultural exploration. Ultimately, their work is ordered around aspects of human response and the human condition. They are not seeking to provide answers to the question of whether China, but rather to explore the individual's place in history in human terms.
Decision Rule Elicitation for Domain Adaptation
Creators: name: Nikitin, Alexander
name: Kaski, Samuel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Human-in-the-loop machine learning is widely used in artificial intelligence (AI) to elicit labels for data points from experts or to provide feedback on how close the predicted results are to the target. This simplifies away all the details of the decision-making process of the expert. In this work, we allow the experts to additionally produce decision rules describing their decision-making; the rules are expected to be imperfect but to give additional information. In particular, the rules can extend to new distributions, and hence enable significantly improving performance for cases where the training and testing distributions differ, such as in domain adaptation. We apply the proposed method to lifelong learning and domain adaptation problems and discuss applications in other branches of AI, such as knowledge acquisition problems in expert systems. In simulated and real-user studies, we show that decision rule elicitation improves domain adaptation of the algorithm and helps to propagate expert's knowledge to the AI model.
Torus-Stable Zone Above Starspots
Creators: name: Sun, Xudong
name: Török, Tibor
name: DeRosa, Marc
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence
The Sun and the Heliosphere

description: The torus instability (TI) of current-carrying magnetic flux tubes is thought to drive many solar coronal mass ejections (CMEs). The background magnetic field provides the stabilizing force: if it decreases with height at a rate slower than a critical value, the TI may be suppressed. Here we estimate the vertical extent of a "torus-stable zone" above starspots using a scaled model for the Sun. For a potential-field model comprising a bipole (as a pair of starspots) in alignment with a global dipole, we show that the upper bound of this zone hc increases with the bipole size a, the dipole field with harmonic coefficient g10, and the source surface radius Rs where the magnetic field becomes radial. The value of hc, ranging from about 0.5a to a significant fraction of the stellar radius, depends on the interplay between the spot and dipole magnetic fields; its upper limit is set by Rs. Suppression of the TI may contribute to the lack of CME detection from active cool stars, as larger starspots, stronger dipole, and more closed magnetic topology significantly expand the torus-stable zone.
description: X. Sun is supported by NSF awards #1848250 and #1854760. T. Török is supported by NSF award ICER-1854790 (PREEVENTS) and by NASA award 80NSSC20K1274.
description: {"references": ["Berdyugina, S. 2005, LRSP, 2, 8", "Chen, J., & Krall, J. 2003, JGR, 108, 1410", "Cheng, X. et al. 2020, ApJ, 894,85", "Donati, J.-F. & Landstreet, J. 2009, ARAAA, 47, 333", "Kliem, B., & T\u00f6r\u00f6k, T. 2006, PRL, 96, 255002", "Moschou, S. et al. 2019, ApJ, 877, 105", "Schrijver, C. et al. 2003, ApJ, 590, 493", "Schrijver, C., & DeRosa, M. 2003, SoPh, 212, 165", "Yeates, A. 2020, SoPh, 295, 119"]}
Symmetry change of $d$-wave superconductivity in $κ$-type organic superconductors
Creators: name: Imajo, Shusaku
name: Kindo, Koichi
name: Nakazawa, Yasuhiro
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: Magnetic-field-angle-resolved heat capacity of dimer-Mott organic superconductors $κ$-(BEDT-TTF)$_2$$X$ is reported. Temperature and field dependence of heat capacity indicates that the superconductivity has line nodes on the Fermi surface, which is a typical feature of $d$-wave superconductivity. In-plane field-angle dependence exhibits fourfold oscillations as well as twofold oscillations due to anisotropy of superconducting gap functions. From analyses of the fourfold term, the gap symmetry is determined as $d_{x^{2}-y^{2}}$+$s_{\pm}$ for $X$=Cu[N(CN)$_2$]Br and $d_{xy}$ for $X$=Ag(CN)$_2$H$_2$O. We suggest that the symmetry difference comes from the competition of $d_{xy}$ and $d_{x^{2}-y^{2}}$ antiferromagnetic fluctuations depending on lattice geometry.
description: 5 figures
Field-dependent roughness of moving domain walls in a Pt/Co/Pt magnetic thin film
Creators: name: Burgos, María José Cortés
name: Guruciaga, Pamela C.
name: Jordán, Daniel
name: Quinteros, Cynthia P.
name: Agoritsas, Elisabeth
name: Curiale, Javier
name: Granada, Mara
name: Bustingorry, Sebastian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The creep motion of domain walls driven by external fields in magnetic thin films is described by universal features related to the underlying depinning transition. One key parameter in this description is the roughness exponent characterizing the growth of fluctuations of the domain wall position with its longitudinal length scale. The roughness amplitude, which gives information about the scale of fluctuations, however, has received less attention. Albeit their relevance, experimental reports of the roughness parameters, both exponent and amplitude, are scarce. We report here experimental values of the roughness parameters for different magnetic field intensities in the creep regime at room temperature for a Pt/Co/Pt thin film. The mean value of the roughness exponent is $ζ= 0.74$, and we show that it can be rationalized as an effective value in terms of the known universal values corresponding to the depinning and thermal cases. In addition, it is shown that the roughness amplitude presents a significant increase with decreasing field. These results contribute to the description of domain wall motion in disordered thin magnetic systems.
description: 10 pages, 7 figures
$B_c(B){\to}D l\tildeν$ form factors in Light-Cone Sum Rules and the $D$-meson distribution amplitude
Creators: name: Zuo, Fen
name: Huang, Tao
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we calculate the weak form factors of the decays $B_c(B)\to Dl\tildeν$ by using the chiral current correlator within the framework of the QCD light-cone sum rules (LCSR). The expressions of the form factors only depend on the leading twist distribution amplitude (DA) of the $D$ meson. Three models of the $D$-meson distribution amplitude are employed and the calculated form factor $F_{B_c\to D}(0)$ is given. Our prediction, by using the $D$-meson distribution amplitude with the exponential suppression at the end points, is compatible with other approaches, and favors the three-points sum rules (3PSR) approach with the Coulumb corrections included.
description: 12 pages, 3 figures
Μελέτη και υλοποίηση κρυπτογραφικού αλγόριθμου Hummingbird σε επίπεδο υλικού
Creators: name: Αντωνίου, Σοφία Ανδρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Κρυπτογραφία
Ψηφιακά συστήματα
Αλγόριθμος κρυπτογράφησης
Hummingbird cryptography algorithm
Digital Systems
Lightweight cryptography

description: Στην παρούσα διπλωματική εργασία γίνεται μια αναλυτική παρουσίαση της κρυπτογράφησης με τον αλγόριθμο Hummingbird, που υλοποιήθηκε σε γλώσσα περιγραφής υλικού VHDL. Η κρυπτογράφηση έρχεται να εξασφαλίσει το απόρρητο των προσωπικών πληροφοριών. Πρόκειται για μια επιστήμη που βασίζεται στα μαθηματικά για την κωδικοποίηση και αποκωδικοποίηση των δεδομένων. Οι μέθοδοι κρυπτογράφησης καθιστούν τα ευαίσθητα προσωπικά δεδομένα προσβάσιμα μόνο σε όσους είναι κατάλληλα εξουσιοδοτημένοι. Εξασφαλίζουν έτσι το απόρρητο στις ψηφιακές επικοινωνίες αλλά και στην αποθήκευση ευαίσθητων πληροφοριών. Ο αλγόριθμος Hummingbird πρόκειται για τον πλέον lightweight αλγόριθμο κρυπτογράφησης που βρίσκεται σε ερευνητικό στάδιο αυτή τη στιγμή και πρόκειται στο μέλλον να χρησιμοποιηθεί ευρέως.
description: In this dissertation we study Hummingbird Cryptographic Algorithm implemented in VHDL - Hardware description language. Cryptography is a science which is based in mathematics for coding and encoding of the data and comes to ensure the security of personal information. With plenty of cryptographic ways, sensitive personal data are accessed only from authorized and certified individuals and machines. Digital communications and sensitive data storages are being protected against attacks. Hummingbird is an ultra lightweight cryptographic algorithm aiming at resource-constrained devices. The design of the Hummingbird cryptographic algorithm is motivated by the well-known Enigma machine and has a hybrid structure of block cipher and stream cipher. It has been shown to be resistant to the most common attacks to block and stream ciphers.
Relational_Collapse_Experiment_Proposal
Creators: name: RANA, Pardeep
Publisher: name: Zenodo
Year: 2025
Subjects: subject: Quantum physics
subject: Experiment
subject: Laboratory experiment

description: This is a proposal for a novel quantum mechanics experiment designed to test whether the internal spin-phase structure of a detector can deterministically influence wavefunction collapse. The experiment predicts that a spin-coherent, magnetized measurement device may cause both particles in an entangled pair to collapse into the same spin state — violating standard quantum predictions. If confirmed, this result would support a relational, deterministic model of collapse and challenge the traditional assumption of randomness. The experiment is feasible with current technology and offers a falsifiable path toward understanding the deeper mechanism of quantum measurement.
Chemical imprints in atmospheric abundance of stars with massive planets
Creators: name: Mishenina Tamara
name: Basak Nina
name: Adibekyan Vardan
name: Soubiran Caroline
name: Kovtyukh Valery
Publisher: name: Zenodo
Year: 2021
Subjects: Stellar Systems

description: Stellar parameters of 25 stars with detected massive planets and abundances of 25 elements from Li to Eu, were investigated based on homogeneous high resolution spectra. The iron abundance [Fe/H] and key elements (Li, C, O, Mg, Si) indicative of the planet formation, as well as the dependencies of [El/Fe] on the condensation temperature (Tcond), were analyzed. We found some interesting results: the mean values of C/O and [C/O] are  = 0.48 ±0.07 and <[C/O]> = -0.07 ±0.07, slightly lower than solar ones; the Mg/Si ratios range from 0.83 to 0.95 for four stars in our sample and from 1.0 to 1.86 for the remaining 21 stars; various slopes of [El/Fe] versus Tcond. The dependencies of the planetary mass on metallicity, the lithium abundance, the C/O and Mg/Si ratios, and also on the [El/Fe]--Tcond slopes were considered.
Strongly Correlated States of Ultracold Rotating Dipolar Fermi Gases
Creators: name: Osterloh, Klaus
name: Barberán, Nuria
name: Lewenstein, Maciej
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study strongly correlated ground and excited states of rotating quasi-2D Fermi gases constituted of a small number of dipole-dipole interacting particles with dipole moments polarized perpendicular to the plane of motion. As the number of atoms grows, the system enters {\it an intermediate regime}, where ground states are subject to a competition between distinct bulk-edge configurations. This effect obscures their description in terms of composite fermions and leads to the appearance of novel composite fermion quasi-hole states. In the presence of dipolar interactions, the principal Laughlin state at filling $ν=1/3$ exhibits a substantial energy gap for neutral (total angular momentum conserving) excitations, and is well-described as an incompressible Fermi liquid. Instead, at lower fillings, the ground state structure favors crystalline order.
description: 5 pages, 5 figures, paper presented at DPG Meeting 2006, as well as Fritz Haber Institute Colloquium
Spin-Charge Separation and the Pauli Electron
Creators: name: Chernodub, M. N.
name: Niemi, Antti J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The separation between the spin and the charge converts the quantum mechanical Pauli Hamiltonian into the Hamiltonian of the non-Abelian Georgi-Glashow model, notorious for its magnetic monopoles and confinement. The independent spin and charge fluctuations both lead to the Faddeev model, suggesting the existence of a deep duality structure and indicating that the fundamental carriers of spin and charge are knotted solitons.
description: 7 pages; v2: new results added, references updated
The random energy model in a magnetic field and joint source-channel coding
Creators: name: Merhav, Neri
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We demonstrate that there is an intimate relationship between the magnetic properties of Derrida's random energy model (REM) of spin glasses and the problem of joint source--channel coding in Information Theory. In particular, typical patterns of erroneously decoded messages in the coding problem have ``magnetization'' properties that are analogous to those of the REM in certain phases, where the non--uniformity of the distribution of the source in the coding problem, plays the role of an external magnetic field applied to the REM. We also relate the ensemble performance (random coding exponents) of joint source--channel codes to the free energy of the REM in its different phases.
description: 25 pages, 2 figures, submitted to Physica A: Startistical Mechanics and its Applications
Text of "Bondole Pit" I
Creators: name: Marah, Kondowulay
name: Rolle, Nicholas
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: lma

description: 3 MOV files. This is a text part of a series on bondole pit. It was recorded using a Zoom recorder and lapel microphone. It is a step-by-step guide on how to use the giant bondole pit to make palm oil. This is a community activity and many people are in the video. The narrator is Kondowulay Marah.
YARARA: Post-processing pipeline for improve radial velocity precision
Creators: name: Cretignier, Michael
Publisher: name: Zenodo
Year: 2021
Subjects: Stellar systems, clusters, and associations
RV
precision
radial velocity

description: We developed YARARA (Cretignier et al. submitted), a new post-processing pipeline designed to provide more precise RV time-series. The pipeline is a data-driven approach based on spectra-timeseries corrections by PCA. Such methods have already proven their value and is well dedicated for stars intensively observed. YARARA is therefore in adequation with observational strategies needed to detect the exoplanets that induce signals below a few m/s in RV. The correction of spectra time-series allows to simultaneously correct for instrumental systematics and stellar activity, preserving the planetary signals. By applying YARARA on three years of HARPN solar observations, a RV precision of 76 cm/s can be achieved (Cretignier et al. in prep), a precision level already sufficient to detect Earth-like planet around Sun-like stars.
Τα περί το μυστήριο της θείας Ευχαριστίας ποιμαντικά προβλήματα
Creators: name: π. Κωνσταντινίδης, Μιχαήλ Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Θεία Ευχαριστία
Ποιμαντικά προβλήματα
Προϋποθέσεις μετοχής και συχνότητα
Holy Eucharist
Pastoral Problems
Participation Preconditions and frequency

description: Το μυστήριο της θείας Ευχαριστίας είναι το κατεξοχήν μυστήριο της εκκλησιαστικής συνάξεως, η οντολογική φανέρωση της Εκκλησίας ως σώματος του Χριστού και το πιο θεμελιώδες γεγονός στην κατά Χριστόν αύξηση και τελείωση των πιστών. Επομένως, είναι αδήριτη ανάγκη οι πιστοί να μετέχουν του μυστηρίου όσον το δυνατόν συχνότερα αλλά και εμπροϋπόθετα. Αυτές οι προϋποθέσεις και η συχνότητα μετοχής στο μυστήριο της θ. Ευχαριστίας αποτελούν το κύριο αντικείμενο μελέτης της διπλωματικής μεταπτυχιακής μας εργασίας. Παραθέτουμε επίσης, τις σύγχρονες αντιευχαριστιακές αντιλήψεις, προλήψεις, ενστάσεις, αντιρρήσεις, καταγράφουμε τις τελικές μας διαπιστώσεις και διατυπώνουμε κάποιες ευχαριστιακές ποιμαντικές προτάσεις.
description: The mystery of Holy Eucharist is the main mystery of the church synaxis, the ontological manifestation of the Church as Body of Christ and the most fundamental fact in, by Christ, improvement and perfection of the faithful. Therefore, it is more than apparent that it behoves all Christians to receive Holy Communion regularly and often but with the necessary and appropriate pre-Eucharistic preparations. These preconditions and participation frequency in the mystery are the main object of our study. Furthermore, we present the modern anti-eucharistic perceptions, prejudices, objections, we record our final findings and propose some Eucharistic pastoral suggestions.
High-frequency acoustic droplet vaporization is initiated by resonance
Creators: name: Lajoinie, Guilllaume
name: Segers, Tim
name: Versluis, Michel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Vaporization of low-boiling point droplets has numerous applications in combustion, process engineering and in recent years, in clinical medicine. However, the physical mechanisms governing the phase conversion are only partly explained. Here, we show that an acoustic resonance can arise from the large speed of sound mismatch between a perfluorocarbon microdroplet and its surroundings. The fundamental resonance mode obeys a unique relationship $kR$~$\sim$ 0.65 between droplet size and driving frequency that leads to a 3-fold pressure amplification inside the droplet. Classical nucleation theory shows that this pressure amplification increases the nucleation rate by several orders of magnitude. These findings are confirmed by high-speed imaging performed at a timescale of ten nanoseconds. The optical recordings demonstrate that droplets exposed to intense acoustic waves generated by inter-digital-transducers nucleate only if they match the theoretical resonance size.
description: the package also contains the supplementary meterial, in the same format as the paper
Το ελληνικό παιδικό-νεανικό μυθιστόρημα του φανταστικού του 21ου αιώνα
Creators: name: Πολύζου, Δήμητρα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Λογοτεχνία του φανταστικού
Παιδικό μυθιστόρημα
Νεανική Λογοτεχνία
Τσβετάν Τοντόροφ
Δαρλάση Αγγελική
Παναγιωτάκης Γιώργος
Fantasy literature
Children’s novel
Adolescent Literature
Tzvetan Todorov
Darlasi Aggeliki
Panagiotakis George

description: Σκοπός της παρούσας διπλωματικής εργασίας είναι η διερεύνηση των λογοτεχνικών ιδιοτήτων που συγκροτούν το φανταστικό σε έξι μυθιστορήματα δύο σύγχρονων Ελλήνων συγγραφέων, της Αγγελικής Δαρλάση και του Γιώργου Παναγιωτάκη. Οι δύο λογοτέχνες απευθύνουν τα πεζογραφικά έργα τους σε παιδιά κι εφήβους του 21ου αιώνα. Η ερευνητική μέθοδος που χρησιμοποιήθηκε είναι η ποιοτική ανάλυση περιεχομένου. Αρχικά, παρατίθεται το θεωρητικό πλαίσιο της θεματικής. Ακολουθεί η ανάλυση των λογοτεχνικών κειμένων σε σημασιολογικό, λεκτικό και συντακτικό επίπεδο. Οι κειμενικές αναφορές αποδελτιώθηκαν, εξετάσθηκαν, ερμηνεύτηκαν και ταξινομήθηκαν βάσει των κατηγοριών και υποκατηγοριών ανάλυσης, οι οποίες διαμορφώθηκαν κυρίως από τη δομική προσέγγιση του Τσβετάν Τοντόροφ. Η μελέτη ολοκληρώνεται με τα αποτελέσματα της έρευνας.
description: The aim of the present dissertation is to investigate the literary qualities that form the fantastic in six novels created by two contemporary Greek writers, Aggeliki Darlasi and George Panagiotakis. Both authors address their work to children and adolescents of the 21st century. The research method draws on qualitative content analysis. Initially, the theoretical framework of the thematic unfolds. The analysis of the literary texts at semantic, verbal and syntactic level follows. The textual references were indexed, examined, interpreted and sorted on the basis of the categories and sub-categories, which were mainly developed on Tzvetan Todorov’s structural approach. The study concludes with the research results.
Far-infrared characterization of an ultra-luminous starburst associated with a massively-accreting black hole at z=1.15
Creators: name: Floc'h, E. Le
name: Willmer, C. N. A.
name: Noeske, K.
name: Konidaris, N. P.
name: Laird, E. S.
name: Koo, D. C.
name: Nandra, K.
name: Bundy, K.
name: Salim, S.
name: Maiolino, R.
name: Conselice, C. J.
name: Lotz, J. M.
name: Papovich, C.
name: Smith, J. D.
name: Bai, L.
name: Coil, A. L.
name: Barmby, P.
name: Ashby, M. L. N.
name: Huang, J. -S.
name: Blaylock, M.
name: Rieke, G.
name: Newman, J. A.
name: Ivison, R.
name: Chapman, S.
name: Dole, H.
name: Egami, E.
name: Elbaz, D.
name: -
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: As part of the "All Wavelength Extended Groth Strip International Survey" (AEGIS), we describe the panchromatic characterization of an X-ray luminous active galactic nucleus (AGN) in a merging galaxy at z=1.15. This object is detected at infrared (8mic, 24mic, 70mic, 160mic), submillimeter (850mic) and radio wavelengths, from which we derive a bolometric luminosity L_bol ~ 9x10^12 Lsol. We find that the AGN clearly dominates the hot dust emission below 40mic but its total energetic power inferred from the hard X-rays is substantially less than the bolometric output of the system. About 50% of the infrared luminosity is indeed produced by a cold dust component that probably originates from enshrouded star formation in the host galaxy. In the context of a coeval growth of stellar bulges and massive black holes, this source might represent a ``transition'' object sharing properties with both quasars and luminous starbursts. Study of such composite galaxies will help address how the star formation and disk-accretion phenomena may have regulated each other at high redshift and how this coordination may have participated to the build-up of the relationship observed locally between the masses of black holes and stellar spheroids.
description: Accepted for publication in ApJL (AEGIS Special Edition) - 5 pages, 1 table, 3 figures
Disentangling multipole resonances through a full x-ray polarization analysis
Creators: name: Mazzoli, C.
name: Wilkins, S. B.
name: Di Matteo, S.
name: Detlefs, B.
name: Detlefs, C.
name: Scagnoli, V.
name: Paolasini, L.
name: Ghigna, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Complete polarization analysis applied to resonant x-ray scattering at the Cr K-edge in K2CrO4 shows that incident linearly polarized x-rays can be converted into circularly polarized x-rays by diffraction at the Cr pre-edge (E = 5994 eV). The physical mechanism behind this phenomenon is a subtle interference effect between purely dipole (E1-E1) and purely quadrupole (E2-E2) transitions, leading to a phase shift between the respective scattering amplitudes. This effect may be exploited to disentangle two close-lying resonances that appear as a single peak in a conventional energy scan, in this way allowing to single out and identify the different multipole order parameters involved.
description: 6 pages, 6 figures
Polarisation observables in lepton antilepton to proton antiproton reactions including lepton mass
Creators: name: Buttimore, N. H.
name: Jennings, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: General expressions, including the lepton mass, for the spin averaged differential cross section for the annihilation reaction lepton antilepton to proton antiproton are given, as well as general formulae for the single and double spin asymmetries in the centre of mass frame. In particular we discuss the single spin asymmetry, normal to the scattering plane, which measures the relative phase difference between nucleon electromagnetic form factors $G_E$ and $G_M$. Recent experimental investigations of these form factors in the space and time like region are reviewed. It is thought that measurements of the phase of these form factors will provide fundamental information on the internal nucleon structure. The phases between $G_E$ and $G_M$ are accessible through polarisation observables measured in the antiproton proton to lepton antilepton reaction, or in its time reversed process.
description: 14 pages, to be submitted to EPJA
title: Potenziale für die räumliche Planung bei Beteiligungsprozessen von Jugendlichen mittels digitaler Medien
title: Eine kritische Reflexion eines Online- und Offline-Beteiligungsprozesses von Jugendlichen
titleType: AlternativeTitle
Creators: name: Bradtke, Alexandra
Publisher: name: Technische Universität Dortmund
Year: 2021
Subjects: subject: Jugendliche
subject: Beteiligung
subject: Digitale Medien
subject: Online
subject: Offline
subject: 710
subject: Stadtentwicklung
subject: Beteiligung
subject: Jugend
subject: Neue Medien

description: Kinder und Jugendliche befinden sich in einer Wachstums- und Lernphase, nehmen in der öffentlichen Stadt- und Regionalplanung, vor allem in Anbetracht sozialräumlicher und infrastruktureller Gegebenheiten, teilweise vordringliche gesellschaftliche Rollen ein. Ein Verhindern der Abwanderung respektive eine Motivation zum Rückkehren zu schaffen ist möglich, wenn Jugendliche zu ihrer Heimat eine so große Verbindung aufbauen, dass sie dort bleiben oder zurückkommen möchten, falls sie nach ihrem Schulabschluss zu Ausbildungs- oder Studienzwecken ihren Wohnort verlassen. Ein einflussreicher Faktor für eine positive Einstellung ist das Erleben einer angenehmen Jugendzeit in der Heimatgemeinde, wofür es unter anderem unerlässlich ist, dass Gemeindeverwaltungen Kinder und Jugendliche in öffentliche Planungsprozesse einbeziehen. Die folgende Untersuchung zeigt, dass Vorteile von Kinder- und Jugendbeteiligungen ihrerseits und auf Seiten öffentlicher Akteure bestehen. Kinder und Jugendliche erweisen sich als Experten für ihre Themen, denn sie kennen Trends und aktuelle Begebenheiten, die ihre Altersklassen bewegen. Aussagen von Experten werden durch diese Arbeit in dem Punkt bestätigt, dass wenn Kinder und Jugendliche ihre Heimat mitgestalten, sie Planungen der öffentlichen Hand vermehrt annehmen. Doch an die heranwachsende Generation heranzutreten, sie zu einer Beteiligung zu motivieren und davon zu überzeugen, ist ein schwieriges Unterfangen. Jugendliche sind so verschieden, haben vielfältige Interessen, verschiedene Entwicklungsstadien und ein unterschiedliches Zeitbudget. Online-Beteiligung mag da der Schlüssel zum Erfolg sein, auf den ersten Blick. Doch diese Arbeit zeigt auf, welche Schwierigkeiten hinter Online- und auch Offline- Beteiligungsmethoden liegen, worin Chancen bestehen und wie Jugendliche für Beteiligungsprozesse zu gewinnen sind, bzw. was sie abhält.
Cultural Logic: A Journal of Marxist Theory & Practice, Vol 12 (2005)
Creators: name: Cultural Logic: A Journal Of Marxist Theory & Practice
Publisher: name: Cultural Logic: A Journal of Marxist Theory & Practice
Year: 2019

description: Theodore W. Allen, 1919-2005 In Memoriam: Theodore W. Allen Commentary on István Mészáros's "Beyond Capital" Terrorism and Revolution Roth, Race, and Newark Stalin and the Struggle for Democratic Reform (Part 1) Stalin and the Struggle for Democratic Reform (Part 2) Civil Society (From) VEILS: ENGAGING SPIVAK Cognitive Mapping or, the Resistant Element in the Work of Fredric Jameson Crime and Warfare in the U.S. Terry Eagleton and the Vicissitudes of Christology Sounding the Future Selected Speakers and Performers from The Million Worker March (Washington, D.C., October 17, 2004) E. San Juan, Jr., "Racism and Cultural Studies: Critiques of Multiculturalist Ideology and the Politics of Difference." (Durham and London: Duke University Press, 2002. 428 pp. paper, $24.95; cloth, $74.95.) George Snedeker, The Politics of Critical Theory: Language/Discourse/Society. University Press of America, 2004, 126 pages. The Corporation. Directed by Mark Achbar and Jennifer Abbot. Poems on Sex & Love Contributors
SiO line emission from C-type shock waves : interstellar jets and outflows
Creators: name: Gusdorf, A.
name: Cabrit, S.
name: Flower, D. R.
name: Forets, G. Pineau des
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the production of SiO in the gas phase of molecular outflows, through the sputtering of Si--bearing material in refractory grain cores, which are taken to be olivine; we calculate also the rotational line spectrum of the SiO. The sputtering is driven by neutral particle impact on charged grains, in steady--state C-type shock waves, at the speed of ambipolar diffusion. The emission of the SiO molecule is calculated by means of an LVG code. A grid of models has been generated. We compare our results with those of an earlier study (Schilke et al. 1997). Improvements in the treatment of the coupling between the charged grains and the neutral fluid lead to narrower shock waves and lower fractions of Si being released into the gas phase. More realistic assumptions concerning the initial fractional abundance of O2 lead to SiO formation being delayed, so that it occurs in the cool, dense postshock flow. Good agreement is obtained with recent observations of SiO line intensities in the L1157 and L1448 molecular outflows. The inferred temperature, opacity, and SiO column density in the emission region differ significantly from those estimated by means of LVG `slab' models. The fractional abundance of SiO is deduced. Observed line profiles are wider than predicted and imply multiple, unresolved shock regions within the beam.
description: 1 tex doc, 19 figures
GENOTYPING STRATEGIES IN LATXA DAIRY SHEEP BREED
Creators: name: Ugarte, Eva
name: Granado-Tajada, Itsasne
name: Varona, Luis
Publisher: name: Zenodo
Year: 2020

description: The inclusion of genomic information into genetic evaluations has been shown to be beneficial for big and well-connected populations, such as dairy cattle. However, for small populations with lower use of artificial insemination, it is necessary to consider their specific characteristics to study the possible advantage of using genotyped individuals. So, the aim of this work is to compare the effect of different genotyping strategies in terms of the accuracy of the predictions, based on the data structure of two dairy sheep breeds, Latxa Cara Rubia (LCR) and Latxa Cara Negra from Euskadi (LCNEUS). To do so, a population was simulated using a base of real pedigree and genotypes of 374 LCNEUS and 451 LCR animals genotyped with the Illumina OvineSNP50 BeadChip. The obtained phenotypic and genotypic data were used into genetic (BLUP) and genomic (ssGBLUP) evaluations for milk yield. For each breed, the genotypes of 1000 males with progeny data were simulated and young rams without phenotypic data were used as validation group. No gain in accuracy was found, resulting in almost the same accuracy into both methodologies (0.46 LCNEUS and 0.53 LCR), which is probably conditioned by lacking genealogy. So, more studies are being done to understand if the percentage of missing genealogy or the data structure are affecting these results. Also, the benefits of natural service rams and females genotyping will be studied.
Internal calibration of Gaia BP/RP low-resolution spectra
Creators: name: Carrasco, J. M.
name: Weiler, M.
name: Jordi, C.
name: Fabricius, C.
name: De Angeli, F.
name: Evans, D. W.
name: van Leeuwen, F.
name: Riello, M.
name: Montegriffo, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The full third Gaia data release will provide the calibrated spectra obtained with the blue and red Gaia slit-less spectrophotometers. The main challenge when facing Gaia spectral calibration is that no lamp spectra or flat fields are available during the mission. Also, the significant size of the line spread function with respect to the dispersion of the prisms produces alien photons contaminating neighbouring positions of the spectra. This makes the calibration special and different from standard approaches. This work gives a detailed description of the internal calibration model to obtain the spectrophotometric data in the Gaia catalogue. The main purpose of the internal calibration is to bring all the epoch spectra onto a common flux and pixel (pseudo-wavelength) scale, taking into account variations over the focal plane and with time, producing a mean spectrum from all the observations of the same source. In order to describe all observations in a common mean flux and pseudo-wavelength scale, we construct a suitable representation of the internally calibrated mean spectra via basis functions and we describe the transformation between non calibrated epoch spectra and calibrated mean spectra via a discrete convolution, parametrising the convolution kernel to recover the relevant coefficients. The model proposed here is able to combine all observations into a mean instrument to allow the comparison of different sources and observations obtained with different instrumental conditions along the mission and the generation of mean spectra from a number of observations of the same source. The output of this model provides the internal mean spectra, not as a sampled function (flux and wavelength), but as a linear combination of basis functions, although sampled spectra can easily be derived from them.
description: 20 pages, 22 figures
Escape of mass in zero-range processes with random rates
Creators: name: Ferrari, Pablo A.
name: Sisko, Valentin V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60K35, 82C22 (Primary)

description: We consider zero-range processes in ${\mathbb{Z}}^d$ with site dependent jump rates. The rate for a particle jump from site $x$ to $y$ in ${\mathbb{Z}}^d$ is given by $λ_xg(k)p(y-x)$, where $p(\cdot)$ is a probability in ${\mathbb{Z}}^d$, $g(k)$ is a bounded nondecreasing function of the number $k$ of particles in $x$ and $λ=\{λ_x\}$ is a collection of i.i.d. random variables with values in $(c,1]$, for some $c>0$. For almost every realization of the environment $λ$ the zero-range process has product invariant measures $\{ν_{λ, v}:0\le v\le c\}$ parametrized by $v$, the average total jump rate from any given site. The density of a measure, defined by the asymptotic average number of particles per site, is an increasing function of $v$. There exists a product invariant measure ${ν_{λ, c}}$, with maximal density. Let $μ$ be a probability measure concentrating mass on configurations whose number of particles at site $x$ grows less than exponentially with $\|x\|$. Denoting by $S_λ(t)$ the semigroup of the process, we prove that all weak limits of $\{μS_λ(t),t\ge 0\}$ as $t\to \infty$ are dominated, in the natural partial order, by ${ν_{λ, c}}$. In particular, if $μ$ dominates ${ν_{λ, c}}$, then $μS_λ(t)$ converges to ${ν_{λ, c}}$. The result is particularly striking when the maximal density is finite and the initial measure has a density above the maximal.
description: Published at http://dx.doi.org/10.1214/074921707000000300 in the IMS Lecture Notes Monograph Series (http://www.imstat.org/publications/lecnotes.htm) by the Institute of Mathematical Statistics (http://www.imstat.org)
Προσδιοριστικοί παράγοντες της ρευστότητας των τραπεζών σε χώρες της Νότιας Ευρώπης
Creators: name: Μπόσδος, Πάρης Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Ρευστότητα
Τραπεζικό Σύστημα
Προσδιοριστικοί Παράγοντες
Liquidity
Commercial Banks
Determinants

description: Κατά τη διάρκεια χρηματοοικονομικής κρίσης των τελευταίων ετών, τα προβλήματα ρευστότητας του τραπεζικού συστήματος έγιναν ιδιαιτέρως αντιληπτά, καθώς η ρευστότητα καθορίζει σε σημαντικό βαθμό τη λειτουργεία των τραπεζικών ιδρυμάτων. Η παρούσα εργασία εκπονείται με απώτερο σκοπό να διερευνήσει τους προσδιοριστικούς παράγοντες που επηρεάζουν τη ρευστότητα των τραπεζών τα έτη 2000-2014 σε χώρες της Νότιας Ευρώπης, όπως είναι η Ελλάδα, η Ιταλία, η Ισπανία και η Πορτογαλία, που έχουν υποστεί τις συνέπειες της χρηματοπιστωτικής κρίσης του 2008. Η εργασία αυτή επιχειρεί να παρουσιάσει τη σχέση μεταξύ των εξαρτημένων (δείκτες ρευστότητας) και των ανεξάρτητων μεταβλητών (CAP, NIM, LLSGL, LOGSIZE, INF, SHORTTERMIR, LONGTERMIR, UNE, FIC), μέσω του ελέγχου της υπόθεσης σχετικά με τις σχέσεις μεταξύ της ρευστότητας των τραπεζών και των ειδικών τραπεζικών παραγόντων (bank-specific) και των μακροοικονομικών παραγόντων που την επηρεάζουν. Αναλύονται τα αποτελέσματα των δεικτών ρευστότητας για κάθε χώρα ξεχωριστά και προσδιορίζονται οι παράγοντες που επηρεάζουν θετικά ή αρνητικά τη ρευστότητα των τραπεζών της εκάστοτε χώρας.
description: As liquidity problems of some banks during global financial crisis re-emphasized, liquidity is very important for functioning of financial markets and the banking sector. The aim of this study is therefore to identify determinants of liquidity of commercial banks in countries of Southern Europe, such as Greece, Italy, Spain and Portugal. The data cover the period from 2000 to 2014. Performing panel data regression analysis, this study is going to present the relationship between the dependent variable (liquidity ratios) and the independent variables (CAP, NIM, LLSGL, LOGSIZE, INF, SHORTTERMIR, LONGTERMIR, UNE, FIC). The results of the liquidity ratios for each country have been analyzed and factors have been determined that influence positively or negatively the liquidity of banks in each country
A Classification of Integrable Quasiclassical Deformations of Algebraic Curves
Creators: name: Konopelchenko, B.
name: Alonso, L. Martinez
name: Medina, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: A previously introduced scheme for describing integrable deformations of of algebraic curves is completed. Lenard relations are used to characterize and classify these deformations in terms of hydrodynamic type systems. A general solution of the compatibility conditions for consistent deformations is given and expressions for the solutions of the corresponding Lenard relations are provided.
description: 21 pages