cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Σημειολογία της εικόνας. Σύγχρονη φιλοσοφική προσέγγιση επί τη βάσει ειδικών πηγών.:
Creators: name: Κοζάτη, Ολγα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Σημειολογία
Εικόνα
Σημείο
Semiology
Image
Sign

description: Σκοπός της διατριβής ήταν η μελέτη της Σημειολογίας της Εικόνας. Αρχικά επιχειρήθηκε ένας γενικότερος ορισμός του σημειολογικού πεδίου ξεκινώντας από τη γλωσσολογία. Στη συνέχεια παρουσιάσαμε την ανάλυση του Saussure για το σημείο για να φτάσουμε στη σημειολογική ανάλυση της εικόνας από τον Roland Barthes και τον Umberto Eco.
description: The aim of the present thesis was the study of the semiology of image. First, we presented the theoritical basis of semiology starting with Saussure’s analysis for the linguistic message and the signified and signifier. Then we examined the image and its signification which is central in Barthes and Eco. Finally, to illustrate the theory, we presented tree examples of image (advertising, arts, theology).
Contextual Classification Using Self-Supervised Auxiliary Models for Deep Neural Networks
Creators: name: Palacio, Sebastian
name: Engler, Philipp
name: Hees, Jörn
name: Dengel, Andreas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Classification problems solved with deep neural networks (DNNs) typically rely on a closed world paradigm, and optimize over a single objective (e.g., minimization of the cross-entropy loss). This setup dismisses all kinds of supporting signals that can be used to reinforce the existence or absence of a particular pattern. The increasing need for models that are interpretable by design makes the inclusion of said contextual signals a crucial necessity. To this end, we introduce the notion of Self-Supervised Autogenous Learning (SSAL) models. A SSAL objective is realized through one or more additional targets that are derived from the original supervised classification task, following architectural principles found in multi-task learning. SSAL branches impose low-level priors into the optimization process (e.g., grouping). The ability of using SSAL branches during inference, allow models to converge faster, focusing on a richer set of class-relevant features. We show that SSAL models consistently outperform the state-of-the-art while also providing structured predictions that are more interpretable.
description: Accepted for publication at the International Conference of Pattern Recognition (ICPR) 2020
The Little Randall-Sundrum Model at the Large Hadron Collider
Creators: name: Davoudiasl, Hooman
name: Perez, Gilad
name: Soni, Amarjit
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a predictive warped model of flavor that is cut off at an ultraviolet scale O(10^3) TeV. This "Little Randall-Sundrum (LRS)" model is a volume-truncation, by a factor $y \approx 6$, of the RS scenario and is holographically dual to dynamics with number of colors larger by $y$. The LRS couplings between Kaluza-Klein states and the Standard Model fields, including the proton constituents, are explicitly calculable without ad hoc assumptions. Assuming separate gauge and flavor dynamics, a number of unwanted contributions to precision electroweak, $Z b\bar b$ and flavor observables are suppressed in the LRS framework, compared with the corresponding RS case. An important consequence of the LRS truncation, independent of precise details, is a significant enhancement of the clean (golden) di-lepton LHC signals, by O(y^3), due to a larger "$ρ$-photon" mixing and a smaller inter-composite coupling.
description: Revtex4, 6 pages, two tables. Typos in the text and reference list corrected
DNA barcoding” αυτοφυών φυτών της οικογένειας Labiatae (Lamiaceae) από τη νήσο Χίο (Ελλάδα) και τη χερσόνησο Ερυθραία (Τουρκία):
Creators: name: Θεοδωρίδης, Σπύρος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: DNA barcoding
Labiatae
Ανατολικό Αιγαίο
East Aegean

description: The plant family Labiatae (Lamiaceae) is known for its fine ornamental or culinary herbs like lavender, mint, oregano, sage and thyme and is a rich source of essential oils for the flavouring and perfume industry. Besides its great economic importance, Labiatae family contributes significantly to the endemic flora of Greece and Turkey. Owing to its economic and ecological significance and to the difficult identification based on morphological characters of several of its taxa, the Labiatae family is an ideal case for developing DNA barcodes. Purpose of this study is to evaluate the utility of DNA barcoding on a local scale in discriminating species of the Labiatae family in Chios Island (Greece) and the adjacent Çeşme-Karaburun Peninsula (Turkey). We chose three cpDNA regions (matK, rbcL, trnH-psbA) that were proposed by previous studies and test them either as single region or multiregion barcodes based on the criteria determined by CBOL (Consortium for the Barcode of Life). Our results show that matK and trnH-psbA are as useful in discriminating species of the Labiatae, for the taxa we examined, as any multiregion combination and could serve as single region barcodes contributing to the conservation and the trade control of species of the Labiatae family occurring in the East Aegean region.
description: Η οικογένεια Labiatae (Lamiaceae) είναι γνωστή για τα καλλωπιστικά και αρτυματικά της βότανα όπως η λεβάντα, η μέντα, η ρίγανη, το φασκόμηλο και το θυμάρι και είναι πλούσια πηγή σε αιθέρια έλαια για τη βιομηχανία τροφίμων και αρωμάτων. Πέραν του μεγάλου οικονομικού της ενδιαφέροντος, η οικογένεια Labiatae συμβάλλει σημαντικά τόσο στην ελληνική όσο και στην τουρκική ενδημική χλωρίδα. Εξαιτίας της οικονομικής και οικολογικής της σημασίας, αλλά και του δύσκολου προσδιορισμού ορισμένων taxa της με χρήση μορφολογικών χαρακτήρων, η οικογένεια Labiatae αποτελεί ιδανική περίπτωση για την ανάπτυξη “DNA barcodes”. Σκοπός της παρούσας εργασίας είναι η εκτίμηση της αποτελεσματικότητας του “DNA barcoding” σε τοπικό επίπεδο διακρίνοντας είδη της οικογένειας Labiatae από τη νήσο Χίο (Ελλάδα) και τη χερσόνησο Ερυθραία (Τουρκία). Επιλέξαμε τρεις περιοχές του χλωροπλαστικού DNA (matK, rbcL, trnH-psbA) οι οποίες έχουν προταθεί από προηγούμενες έρευνες και τις δοκιμάζουμε τόσο μεμονωμένα όσο και σε συνδυασμό με βάση τα κριτήρια που έχουν τεθεί από το CBOL (Consortium for the Barcode of Life). Τα αποτελέσματα δείχνουν ότι οι περιοχές matk και trnH-psbA είναι εξίσου χρήσιμες στο να διακρίνουν είδη της οικογένειας Labiatae όσο κάθε συνδυασμός πολλαπλών περιοχών και θα μπορούσαν να συνεισφέρουν ως ατομικά “barcodes” στη διατήρηση και τον έλεγχο του εμπορίου των ειδών της οικογένειας Labiatae στην περιοχή του Ανατολικού Αιγαίου.
The Ophiuchus DIsc Survey Employing ALMA (ODISEA)-III: the evolution of substructures in massive discs at 3-5 au resolution
Creators: name: Cieza, Lucas A.
name: González-Ruilova, Camilo
name: Hales, Antonio S.
name: Pinilla, Paola
name: Ruíz-Rodríguez, Dary
name: Zurlo, Alice
name: Casassus, Simón
name: Pérez, Sebastián
name: Cánovas, Hector
name: Arce-Tord, Carla
name: Flock, Mario
name: Kurtovic, Nicolas
name: Marino, Sebastian
name: Nogueira, Pedro H.
name: Perez, Laura
name: Price, Daniel J.
name: Principe, David A.
name: Williams, Jonathan P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present 1.3 mm continuum ALMA long-baseline observations at 3-5 au resolution of 10 of the brightest discs from the Ophiuchus DIsc Survey Employing ALMA (ODISEA) project. We identify a total of 26 narrow rings and gaps distributed in 8 sources and 3 discs with small dust cavities (r $$20 au). We find that the 1.3 mm radial profiles of these objects are in good agreement with those produced by numerical simulations of dust evolution and planet-disc interactions, which predict the accumulation of mm-sized grains at the edges of planet-induced cavities. Our long-baseline observations resulted in the largest sample of discs observed at $\sim$3-5 au resolution in any given star-forming region (15 objects when combined with Ophiuchus objects in the DSHARP Large Program) and allow for a demographic study of the brightest $\sim5\%$ of the discs in Ophiuchus (i.e. the most likely formation sites of giant planets in the cloud). We use this unique sample to propose an evolutionary sequence and discuss a scenario in which the substructures observed in massive protoplanetary discs are mainly the result of planet formation and dust evolution. If this scenario is correct, the detailed study of disc substructures might provide a window to investigate a population of planets that remains mostly undetectable by other techniques.
description: 21 pages, 10 figures. Appendix with 3 additional figures. Version 2, identical to previous one, but now accepted for publication (in MNRAS)
M1 resonance in $^{208}$Pb within the self-consistent phonon-coupling model
Creators: name: Tselyaev, V.
name: Lyutorovich, N.
name: Speth, J.
name: Reinhard, P. -G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The main goal of the paper is to investigate theoretically the experimentally observed fragmentation of the isovector $M1$ resonance in $^{208}$Pb within a self-consistent model based on an energy-density functional (EDF) of the Skyrme type. This fragmentation (spread of the $M1$ strength) is not reproduced in a conventional one-particle--one-hole ($1p1h$) random-phase approximation (RPA) and thus has to be investigated in the framework of more complicated models. However, previously applied models of this type were not self-consistent. In the present work, we use a recently developed renormalized version of the self-consistent time blocking approximation (RenTBA) in which the $1p1h\otimes$phonon configurations are included on top of the RPA $1p1h$ configurations. We have determined several sets of the parameters of the modified Skyrme EDF fitted within the RenTBA and RPA and have found the necessary condition of producing the fragmentation of the $M1$ resonance in $^{208}$Pb in our model. We present also the results of the RenTBA and RPA calculations for the first excited states of the natural parity modes in $^{208}$Pb obtained with these modified parametrizations.
description: 11 pages, 4 figures
Ιστορικισμός και Ουσιοκρατία στη φιλοσοφία τέχνης του Arthur Danto.:
Creators: name: Περράκης, Ευάγγελος-Αλέξανδρος Στυλιανού
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Ιστορικισμός
Ουσιοκρατία
Φιλοσοφία τέχνης/ Αισθητική
Historicism
Essentialism
Philosophy of Art/ Aesthetics

description: Σχεδόν από το ξεκίνημά τους, τέχνη και φιλοσοφία βρίσκονται σε διαρκή διάλογο. Η μελέτη εξετάζει αυτή τη σχέση από τις απαρχές της, καθώς και το διαλεκτικό δρόμο που ακολούθησαν κατά το ιστορικό τους ξεδίπλωμα. Εστιάζει κυρίως στον αμερικανό αναλυτικό φιλόσοφο Arthur Danto, ο οποίος, προσεγγίζοντας με ευρηματικότητα το ζήτημα της τέχνης, ανακάλυψε ότι κατά τη δεκατία του '60 επιτελέστηκε η τελευταία επανάσταση στο χώρο της τέχνης. Το τέλος της τέχνης και ο ορισμός της συναντιούνται, στη θεωρία του Danto, σ' ένα Παράδειγμα που αναγγέλει τη χειραφέτηση της τέχνης από τα δεσμά της ιστορίας και ταυτόχρονα την ανάδυση της φιλοσοφίας της τέχνης. Η αναλυτική φιλοσοφία συμπλέκεται με τη φιλοσοφία της ιστορίας της τέχνης, καθώς η εγελιανή αισθητική διατήρησε την εφαρμοσιμότητά της στην ιστορική και στην, κατά Danto, μετα-ιστορική εποχή της τέχνης. Η μελέτη προσπαθεί επίσης να ελέγξει κριτικά το κατά πόσο η σύγκρουση ιστορικισμού και ουσιοκρατίας λύεται στο Παράδειγμα του τέλους/ορισμού της τέχνης, καθώς και να θέσει έναν ευρύτερο προβληματισμό πάνω στο έργο του Danto και στην τέχνη γενικότερα.
description: Since almost their “birth”, art and philosophy are in a constant dialogue. This research observes this relationship from its beginning, but also the dialectical path that it followed throughout history. Focuses on the American analytical philosopher Arthur Danto, who by approaching the issue of art ingeniously, came to the conclusion that during the 60's the last revolution of history was performed. The end and the definition of art, in Danto's theory, join in a Paradigm which declares the emancipation of art from the bonds of history and simultaneously the emergence of the philosophy of art. The analytical philosophy interacts with the philosophy of art history, while Hegelian aesthetics kept its implementation during art's historical, and according to Danto, post-historical era. This research is also an attempt to examine critically whether the conflict between historicism and essentialism is being solved in the Paradigm of the end/definition of art, and to raise a wider discussion not only on Danto’s work, but on arts in general as well.
The Impact Of Thymectomy In Thymomatous And Nonthymomatous Myasthenia Gravis – The Experience Of A Tertiary Center
Creators: name: Cunha, Sara
name: Faustino, Pedro
name: Jorge, André
name: Graça, Luís L.
name: Almendra, Luciano
name: Matos, Anabela
name: Negrão, Luís
name: Pancas, Rita
Publisher: name: Portuguese Journal of Cardiac Thoracic and Vascular Surgery
Year: 2024

description: Introduction: Thymectomy remains a mainstay of treatment in Thymomatous (T) and Nonthymomatous (nT) Myasthenia Gravis (MG), with improved clinical outcomes and reduced need for medical treatment, however, there is little research regarding long-term follow-up. We aim to assess the impact of surgery on the long-term outcome of patients with MG at our center.

Methods: Retrospective analyses of MG patients submitted to thymectomy between 2007 and 2017 at the thoracic surgery department of CHUC. Clinical assessment was performed according to the MG Foundation of America (MGFA) Clinical Classification (cMGFA). The follow-up was categorized according to the MGFA Post-intervention Status (MGFA-PIS) and cMGFA. Statistical analysis was performed with SPSS, to a significance level of 5%.

Results: Thirty-seven patients underwent extended thymectomy and 67.6% were female. Median age at diagnosis was 46.68±19.2 years. Most patients (83.8%) had anti-acetylcholine receptor antibodies and 81.1% had generalized forms of MG. Many patients (67.6%) had surgery less than 12 months after the clinical diagnosis. TMG was present in 19 (51.4%) patients. Compared to nTMG, these patients were older (54.06±17.9 vs 40.17±19.4 years) and most were men (52.9% vs 16.7%). We obtained a good outcome in most patients in the first (81.1%), second (86.1%), and fifth (84.8%) year of follow-up. There was a shift towards better prognosis categories in the good outcome group: 9.1% CSR, 3.0% PR, and 66,7% MM in the fifth year. Preoperative medical treatment did not influence the long-term follow-up outcome. A shorter time to surgery (< 12 months) correlated with better outcomes at year 5 (p=0.016).

Conclusion: Thymectomy led to a sustained clinical improvement in our cohort, allowing for a reduced need for medication. A shorter time to surgery seems to have a positive influence on long-term prognosis. We expect that an extended follow-up would improve our results.
description: Portuguese Journal of Cardiac Thoracic and Vascular Surgery, Vol. 30 No. 4 (2023): Oct-Dec
Collective Behavior of Self Propelling Particles with Kinematic Constraints; The relation between the discrete and the continuous description
Creators: name: Ratushnaya, V. I.
name: Bedeaux, D.
name: Kulinskii, V. L.
name: Zvelindovsky, A. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: In two papers we proposed a continuum model for the dynamics of systems of self propelling particles with kinematic constraints on the velocities and discussed some of its properties. The model aims to be analogous to a discrete algorithm used in works by T. Vicsek et al. In this paper we derive the continuous hydrodynamic model from the discrete description. The similarities and differences between the resulting model and the hydrodynamic model postulated in our previous papers are discussed. The results clarify the assumptions used to obtain a continuous description.
description: 7 pages
Η πολυτυπία του ρήματος σε μεσαιωνικά κυπριακά κείμενα:
Creators: name: Βασιλείου, Ανδρέας Κλεάνθη
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Πολυτυπία
Μεσαιωνική κυπριακή διάλεκτος
Ρήμα
Polytypy
Medieval cypriot dialect
Verb

description: Η εργασία αυτή έχει ως κύριο στόχο τη μελέτη της πολυτυπίας του ρήματος σε κείμενα της μεσαιωνικής κυπριακής διαλέκτου από τον 13ο εώς τον 16ο αιώνα. Επίσης, σημαντικότατος στόχος μας είναι η εξακρίβωση του βαθμού αρχαϊκότητας ή νεωτερικότητας των κειμένων που χρησιμοποιήθηκαν, όπως αυτή μπορεί να προκύψει μέσα από τη μελέτη του ρηματικού συστήματος. Οι βασικές πηγές άντλησης του υλικού μας υπήρξαν τα κείμενα Ασίζες Β, Χρονικό του Μαχαιρά, Χρονικό του Βουστρωνίου και Άνθος Χαρίτων (Φιόρ δε Βερτού). Στην προσπάθειά μας λοιπόν να εξετάσουμε τη ρηματική πολυτυπία στη μεσαιωνική κυπριακή διάλεκτο, κρίναμε απαραίτητη τη μελέτη και την αναλυτική παρουσίαση των ρηματικών καταλήξεων που απαντούν στα επιμέρους κείμενα. Επίσης ασχοληθήκαμε με την περιγραφή του ρηματικού θέματος και τέλος με την εξέταση των περιφραστικών σχηματισμών στους οποίους συμμετέχει το ρήμα, είτε αυτοί χρησιμοποιούνται για να δηλωθούν οι χρόνοι - μέλλοντας, παρακείμενος και υπερσυντέλικος - είτε δηλώνουν άλλες σημασιακές υποκατηγορίες της χρονικότητας. Τα βασικά συμπεράσματα στα οποία καταλήξαμε είναι ότι η αρχαϊκότητα των ρηματικών καταλήξεων καθώς και των λοιπών ρηματικών σχηματισμών είναι άρρηκτα συνδεδεμένη με την παλαιότητα του κειμένου. Το γ’ πληθυντικό είναι το πρόσωπο που παρουσιάζει τη μεγαλύτερη πολυτυπία στις ρηματικές καταλήξεις, ενώ όσον αφορά τη δήλωση της χρονικής βαθμίδας, η εντονότερη πολυτυπία εμφανίζεται στις καταλήξεις του αορίστου μέσης φωνής.
description: The primary aim of this thesis is to study the polytypy of verbs in texts which are written in the medieval Cypriot dialect and which are dated from the 13th to the 16th century. Namely, these texts are Assises B, Machaeras and Voustronios’s Annals and Anthos Chariton (Fior de Vertu). Another important aim is to trace the degree of archaism or innovation of the material used through a thorough examination of the verbal system. Therefore, in order to study the verbal polytypy that the medieval Cypriot dialect displays, all verbal suffixes are listed and indexed. Additionally, verbal themes are put under scrutiny and the same applies for periphrastic formations of the verb, whether these are used to indicate the tense (future, present perfect and past perfect) or other temporal meanings and relations. In conclusion, it is suggested that the archaism of verbal suffixes and other verbal formations is inextricably connected to the oldness of the texts. The third person plural is the one which appears in most cases with different verbal ending, whereas pluralism is also observed in the suffixes of the past tense in the middle voice.
Measurement of the Bs-Bsbar Oscillation Frequency
Creators: name: CDF Collaboration
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present the first measurement of the Bs-Bsbar oscillation frequency Delta m_s. We use 1 fb^-1 of data from p-pbar collisions at sqrt{s}=1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. The sample contains signals of 3,600 fully reconstructed hadronic Bs decays and 37,000 partially reconstructed semileptonic Bs decays. We measure the probability as a function of proper decay time that the Bs decays with the same, or opposite, flavor as the flavor at production, and we find a signal consistent with Bs-Bsbar oscillations. The probability that random fluctuations could produce a comparable signal is 0.2%. Under the hypothesis that the signal is due to Bs-Bsbar oscillations, we measure Delta m_s = 17.31^{+0.33}_{-0.18} (stat.) +- 0.07 (syst.) ps^-1 and determine |Vtd/Vts| = 0.208^{+0.001}_{-0.002} (exp.) ^{+0.008}_{-0.006} (theo.).
description: 7 pages, 1 figure
Ostwald ripening of faceted two-dimensional islands
Creators: name: Kaganer, V. M.
name: Braun, W.
name: Sabelfeld, K. K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study Ostwald ripening of two-dimensional adatom and advacancy islands on a crystal surface by means of kinetic Monte Carlo simulations. At large bond energies the islands are square-shaped, which qualitatively changes the coarsening kinetics. The Gibbs--Thomson chemical potential is violated: the coarsening proceeds through a sequence of `magic' sizes corresponding to square or rectangular islands. The coarsening becomes attachment-limited, but Wagner's asymptotic law is reached after a very long transient time. The unusual coarsening kinetics obtained in Monte Carlo simulations are well described by the Becker--Döring equations of nucleation kinetics. These equations can be applied to a wide range of coarsening problems.
X-ray and ultraviolet observations of the eclipsing cataclysmic variables OV Bootis and SDSS J103533.02+055158.3 with degenerate donors
Creators: name: Schwope, Axel
name: Worpel, Hauke
name: Traulsen, Iris
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The majority of cataclysmic variables are predicted to be post-period minimum systems with degenerate donor stars, the period bouncers. Owing to their intrinsic faintness, however, only a handful of these systems have so far been securely identified. We want to study the X-ray properties of two eclipsing period bouncers, OV Bootis and SDSS J103533.02+055158.3, that were selected for this study due to their proximity to Earth. We have obtained XMM-Newton phase-resolved X-ray and ultraviolet observations of the two objects for spectral and timing analysis. Owing to a recent dwarf nova outburst OV Boo was much brighter than SDSS J103533.02+055158.3 at X-ray and ultraviolet wavelengths and the eclipse could be studied in some detail. An updated eclipse ephemeris was derived. The X-rays were shown to originate close to the white dwarf, the boundary layer, with significant absorption affecting its spectrum. There was no absorption in SDSS J103533.02+055158.3, despite being observed at the same inclination indicating different shapes of the disk and the disk rim. The white-dwarf temperature was re-determined for both objects: the white dwarf in OV Boo was still hot (23,000 K) five months after a dwarf nova outburst, and the white dwarf in SDSS J103533.02+055158.3 hotter than assumed previously (Teff = 11,500 K). All three cataclysmic variables with degenerate donors studied so far in X-rays, including SDSS J121209.31+013627.7, were clearly discovered in X-rays and revealed mass accretion rates dot(M) >= 8 x 10^(-15) Msun/ yr. If their X-ray behavior is representative of the subpopulation of period bouncers, the all-sky X-ray surveys with eROSITA together with comprehensive follow-up will uncover new objects in sufficient number to address the remaining questions concerning late-stage cataclysmic variable evolution.
description: 12 pages, 13 figures, accepted for publication in A&A
Οικονομία και θεωρία των πολιτευμάτων στον Αριστοτέλη:
Creators: name: Κώτσιος, Παναγιώτης Σωτηρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Αριστοτέλης
Οικονομία
Πολιτεύματα
Aristotle
Economy
Constitutions

description: Στόχος της εργασίας αυτής είναι να εξετάσει τις οικονομικές απόψεις του φιλοσόφου Αριστοτέλη σε σχέση με τη θεωρία του για τα πολιτεύματα. Η ανάλυση ξεκινά με μια σύντομη βιογραφική αναφορά για τον φιλόσοφο και μια περιγραφή της θέση του στην ιστορία της οικονομικής θεωρίας. Στην συνέχεια αναφέρονται οι διάφορες οικονομικές απόψεις που διατύπωσε στα διασωθέντα έργα του και κατόπιν αναλύεται η θεωρία του σε σχέση με τα πολιτεύματα. Οι απόψεις του για τα δύο προηγούμενα ζητήματα συσχετίζονται ώστε να ερευνηθούν οι σχέσεις και οι αντιθέσεις ανάμεσά τους. Έπειτα εξετάζεται κριτικά το θέμα της δουλείας, όπως αυτό έγινε κατανοητό από τον φιλόσοφο. Το βασικό συμπέρασμα της ανάλυσης είναι ότι το οικονομικό και πολιτικό στοιχείο συνδέονται στενά στη σκέψη του φιλοσόφου, αλλά στη συνολική του ανάλυση παρατηρούνται κάποιες σημαντικές παραλήψεις σε σχέση με την οικονομική διάρθρωση των πόλεων και των πολιτευμάτων.
description: The goal of the current research is to examine the economic views of philosopher Aristotle in relation to his constitutional theory. The analysis starts with a short biography about the philosopher and a description of his position in the history of economic theory. Following there is an outline of the economic views he expressed in his saved works and an analysis of his constitutional theory. His opinions on these two topics are related in order to find similarities and conflicts between the two. Then the topic of slavery is examined, as this was understood by the philosopher. The basic conclusion is that economic and political elements are closely related in the mind of the philosopher, but some important omissions are observed in his overall analysis in relation to the economic structure of cities and constitutions.
Edge detection for the segmentation of salmonids in digital images
Creators: name: Savage, Colin
Publisher: name: University of British Columbia
Year: 2009

description: Video footage of salmonids i n sea cages was obtained from a number of areas in Johnstone and Georgia Strait. The footage represented a large number of camera orientations including camera image axis perpendicular and parallel to the water surface. Perpendicular orientations included camera image axis pointing towards the bottom and surface of the water column. Parallel orientations included camera image axis pointing towards the center and side of the sea cage. The use of a white tarp when the cameras were positioned parallel to the water surface provides separation under lower signal to noise ratios. A discussion of noise sources provides a key to understanding the difficulties applying image processing to noisy digital images. In addition, attenuation and scattering when combined with countershading of salmonids illustrates the reflectivity image degradation of salmonids in the water column when viewed from the camera position. Edge detection techniques were applied to noisy digital video images. A comparison of different edge detectors and pre-processing steps was made to determine the "best" separation technique. The Canny operator with a sigma of 2.0 proved to be the "best" edge detector. In order to smooth noisy images, a pre-processing step of Anisotropic Diffusion was applied when the signal to noise ratio was low. This work provides a basis for the automation of counting and sizing assessment of salmonids.
picta Hag.
Creators: name: Hagen, H.
Publisher: name: Zenodo
Year: 1863
Subjects: Biodiversity
Taxonomy
Animalia

description: 18. Panorpa picta Hag.
Klein Asien. Ein Weibchen wurde mir 1852 von Frivaldszky mitgetheilt. P. communis a f ﬁnis, tola nigra, alis hyalinis, fasciis tribus Iatis nigris, media postice ƒurcata, apiculi macula hyalino, macula alarum anticarum costali inter duas priores, aliaque basali nigris; venis nigris, pterostigmate fulvo. Long. 15 millim. Exp. alar. 37 millim.
description: Published as part of Hagen, H., 1863, Die Odonaten- und Nenropteren-Fauna Syriens und Klein-Asiens, pp. 193-199 in Wiener Entomologische Monatschrift 7 on page 199, DOI: 10.5281/zenodo.3528093
Do Long-Lived Features Really Exist in the Solar Photosphere? II. Contrast of Time-Averaged Granulation Images
Creators: name: Brandt, P. N.
name: Getling, A. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The decrease in the rms contrast of time-averaged images with the averaging time is compared between four datasets: (1) a series of solar granulation images recorded at La Palma in 1993; (2) a series of artificial granulation images obtained in numerical simulations by Rieutord et al. (2002); (3) a similar series computed by Steffen and his colleagues (see Wedemeyer et al., 2004}); (4) a random field with some parameters typical of the granulation, constructed by Rast (2002). In addition, (5) a sequence of images was obtained from real granulation images using a temporal and spatial shuffling procedure, and the contrast of the average of n images from this sequence as a function of n is analysed. The series (1) of real granulation images exhibits a considerably slower contrast decrease than do both the series (3) of simulated granulation images and the series (4) of random fields. Starting from some relatively short averaging times t, the behaviour of the contrast in series (3) and (4) resembles the t^{-1/2} statistical law, while the shuffled series (5) obeys the n^{-1/2} law from n = 2 on. Series (2) demonstrates a peculiarly slow decline of contrast, which could be attributed to particular properties of the boundary conditions used in the simulations. Comparisons between the analysed contrast-variation laws indicate quite definitely that the brightness field of solar granulation contains a long-lived component, which could be associated with locally persistent dark intergranular holes and/or with the presence of quasi-regular structures. The suggestion that the random field (4) successfully reproduces the contrast-variation law for the real granulation (Rast, 2002) can be declined.
description: Accepted by Solar Physics
Enhancement of mobilities in a pinned multidomain crystal
Creators: name: Coupier, Gwennou
name: Jean, Michel Saint
name: Guthmann, Claudine
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Mobility properties inside and around degenerate domains of an elastic lattice partially pinned on a square array of traps are explored by means of a fully controllable model system of macroscopic particles. We focus on the different configurations obtained for filling ratios equal to 1 or 2 when the pinning strength is lowered. These theoretically expected but never observed configurations are degenerated, which implies the existence of a multidomain crystal. We show that the distinction between trapped and untrapped particles that is made in the case of strong pinning is not relevant for such a weaker pinning. Indeed, one ought to distinguish between particles inside or around the domains associated to positional degeneracies. The possible consequences on the depinning dynamics of the lattice are discussed.
description: 7 pages, 10 figures Version 2 : longer version
Βασιλεία και Τραπεζικός Δανεισμός:
Creators: name: Τζιβάνη, Μαρία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Βασιλεία
Τραπεζικός Δανεισμός
Επισφαλή Δάνεια
Basel
Bank Lending
Non performing loans

description: Στόχος της διπλωματικής εργασίας είναι η μελέτη των πλαισίων που θέτει το Σύμφωνο της Βασιλείας ΙΙ, δεδομένων των πρωτόγνωρων και δυσμενών οικονομικών συγκυριών που βιώνει η χώρα μας. Εκτενής αναφορά πραγματοποιείται γύρω από τη λειτουργία των τραπεζών, τον τραπεζικό δανεισμό, τις μεθόδους τις οποίες τα πιστωτικά ιδρύματα εφαρμόζουν προκειμένου να αξιολογηθεί η πιστοληπτική ικανότητα της πελατείας τους και, τέλος, τα μέτρα που έχουν ληφθεί εν όψει της αύξησης των επισφαλών δανείων. Για την εκπόνηση της παρούσας διπλωματικής εργασίας συνεργάστηκα με την επιβλέπουσα Επίκουρη Καθηγήτρια κ. Κοσμίδου Κυριακή, την οποία και ευχαριστώ ιδιαίτερα για την καθοδήγησή της καθ’ όλη τη διάρκεια εκπόνησης της εργασίας. Επιθυμώ να ευχαριστήσω θερμά την οικογένειά μου που πάντοτε υποστηρίζει υλικά και κυρίως συναισθηματικά τις σπουδές και την πρόοδό μου και, τέλος, την Ελένη, για την ηθική συμπαράσταση της καθ’ όλη τη διάρκεια του μεταπτυχιακού προγράμματος.
description: The purpose of this thesis is to study the framework of Basel II, given the unprecedented and adverse economic conditions experienced by our country. Extensive reference is made to the function of banks, bank lending, the methods that apply to credit institutions to assess the creditworthiness of their customers and, finally, the measures taken in view of non performing loans. For the preparation of this thesis, I cooperated with Dr. Kosmidou Kyriaki, Αssistant Professor, my supervisor, to which I am particularly grateful for her guidance throughout the thesis development. I would like to thank my family who always support physically as well as emotionally my studies and my progress and also, Eleni, for the moral support that she offered during the postgraduate program.
Realistic Exact Solution for the Exterior Field of a Rotating Neutron Star
Creators: name: Pachon, Leonardo. A.
name: Rueda, Jorge A.
name: Sanabria-Gomez, Jose D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A new six-parametric, axisymmetric and asymptotically flat exact solution of Einstein-Maxwell field equations having reflection symmetry is presented. It has arbitrary physical parameters of mass, angular momentum, mass--quadrupole moment, current octupole moment, electric charge and magnetic dipole, so it can represent the exterior field of a rotating, deformed, magnetized and charged object; some properties of the closed-form analytic solution such as its multipolar structure, electromagnetic fields and singularities are also presented. In the vacuum case, this analytic solution is matched to some numerical interior solutions representing neutron stars, calculated by Berti & Stergioulas (Mon. Not. Roy. Astron. Soc. 350, 1416 (2004)), imposing that the multipole moments be the same. As an independent test of accuracy of the solution to describe exterior fields of neutron stars, we present an extensive comparison of the radii of innermost stable circular orbits (ISCOs) obtained from Berti & Stergioulas numerical solutions, Kerr solution (Phys. Rev. Lett. 11, 237 (1963)), Hartle & Thorne solution (Ap. J. 153, 807, (1968)), an analytic series expansion derived by Shibata & Sasaki (Phys. Rev. D. 58 104011 (1998)) and, our exact solution. We found that radii of ISCOs from our solution fits better than others with realistic numerical interior solutions.
description: 13 pages, 13 figures, LaTeX document
Topological one-way large-area waveguide states in magnetic photonic crystals
Creators: name: Wang, Mudi
name: Zhang, Ruo-Yang
name: Zhang, Lei
name: Wang, Dongyang
name: Guo, Qinghua
name: Zhang, Zhao-Qing
name: Chan, C. T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We have theoretically and experimentally achieved large-area one-way transport by using heterostructures consisting of a domain of an ordinary photonic crystal (PC) sandwiched between two domains of magnetic PCs. The non-magnetized domain carries two orthogonal one-way waveguide states which have amplitude uniformly distributed over a large-area. These two waveguide states support unidirectional transport even though the medium of propagation is not magnetized. We show both experimentally and numerically that such one-way waveguide states can be utilized to abruptly narrow the beam width of an extended state to concentrate energy. Such extended waveguide modes are robust to different kinds of defects, such as voids and PEC barriers. They are also immune to the Anderson type localization when large randomness is introduced.
description: 12 pages, 5 figures
Η προβληματική της μη αιτηθείσας ηλεκτρονικής επικοινωνίας:
Creators: name: Δρομπαλή, Σταματούλα Σωτηρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: εμπορική επικοινωνία
ανεπιθύμητη αλληλογραφια
ηλεκτρονικές απάτες
spam
scam
UBM

description: H μη αιτηθείσα ηλεκτρονική επικοινωνία (spam), αυξάνεται συνεχώς, καθώς αυξάνεται η επέκταση του διαδικτύου, ο αριθμός των χρηστών και βελτιώνεται η τεχνολογία. Η πιο διαδεδομένη μορφή της μη αιτηθείσας ηλεκτρονικής επικοινωνίας είναι η ανεπιθύμητη αλληλογραφία. Η διεύθυνση του ηλεκτρονικού ταχυδρομείου του χρήστη αποτελεί προσωπικό δεδομένο, έτσι πρέπει να παρέχεται προστασία αυτού. Επίσης, η μη αιτηθείσα ηλεκτρονική επικοινωνία αφορά πλέον και άλλα μέσα επικοινωνίας. Για παράδειγμα, αυτή η πρακτική χρησιμοποιείται πλέον και στις κινητές συσκευές (scam). Η ανεπιθύμητη εμπορική επικοινωνία στις κινητές συσκευές είναι λιγότερη διαδεδομένη, αλλά εξίσου επικίνδυνη, καθώς μπορεί να προκαλέσει οικονομικές ζημίες στο χρήστη. Οι προσπάθειες αν όχι εξάλειψης αλλά τουλάχιστον περιορισμού του φαινομένου σε παγκόσμιο επίπεδο, είναι σημαντικές και συνεχείς. Είτε γίνονται από αρμόδιες αρχές, με χρήση του ισχύοντος νομοθετικού πλαισίου, είτε από τους ίδιους τους χρήστες, με σωστή ενημέρωση και χρήση των κατάλληλων τεχνικών εργαλείων προστασίας. Παρόλα αυτά, όσο εξελίσσονται νέες τεχνικές αντιμετώπισης, τόσο εξελίσσονται και οι τρόποι αποφυγής τους από τους αποστολείς (spammers).
description: Unsolicited electronic communications (spam), increases continuously while Internet and the number of users expands and technology improves. The most common form of unsolicited electronic communication is spam. Spam is the unsolicited e-mail. The e-mail address of a user, consists personal data, so it is important that protection is provided. Unsolicited electronic communication is also used in mobile devices (scam). The unwanted commercial communications to mobile devices are less common but equally dangerous, as it can cause economic losses to the user. There are done substantial and continuous efforts worldwide, if not to eradicate, at least to reduce the problem. These efforts are done by competent authorities, using the existing legislative framework, either by users themselves, using the appropriate technical tools of data protection. However, as new techniques develop to reduce the number of spam, spammers always develop new techniques to penetrate.
Giant Intrathoracic Desmoid Tumor – a Case Report
Creators: name: Cunha, Sara
name: L. Graça, Luis
name: Lopes, Rita
name: Almeida, Vânia
name: Pancas, Rita
Publisher: name: Portuguese Journal of Cardiac Thoracic and Vascular Surgery
Year: 2024

description: Desmoid tumors are soft tissue neoplasms arising from fascial and muscle-aponeurotic structure. These tumors are locally aggressive and have a high recurrence rate, even after complete resection. We present the case of a female with a giant intrathoracic desmoid tumor. She underwent complete surgical resection with no disease recurrence. Desmoid tumors’ natural history is not well defined and is often enigmatic, making these tumors difficult to manage. Currently, for intrathoracic desmoid tumors, medical treatment is the recommended approach, nevertheless, surgery can be considered in selected patients.
description: Portuguese Journal of Cardiac Thoracic and Vascular Surgery, Vol. 30 No. 4 (2023): Oct-Dec
Outcomes Of Surgically Treated N2-Positive Non-Small Cell Lung Cancer
Creators: name: Rei, Joana
name: Castro, Patrícia
name: Guerra, Miguel
name: Miranda, José
Publisher: name: Portuguese Journal of Cardiac Thoracic and Vascular Surgery
Year: 2024

description: Introduction: The role of surgery in the treatment of stage IIB/IIIA lung cancer is still a matter of debate. To assess the outcomes of N2-positive patients, we performed a retrospective 10-year study including all patients with histologically proven N2 disease submitted to lung resection surgery by the same surgical team in three different hospitals.

Materials and Methods: Demographic, clinical, surgical and survival data were collected from patients’ clinical registries. Patients were divided into groups according to evidence of neoadjuvant chemotherapy and number of positive N2 stations. Outcomes regarding survival time within and between groups were calculated and compared.

Results: Sixty-four patients were included in our study, with a mean age of 62,2 years. Surgery was performed by uniportal VATS in 43.8% of cases. A mean of 3 nodal stations were sampled and 35 patients (54.7%) had one single positive N2 station. Post-operative complications occurred in 27% of patients but no post-operative mortality was recorded. Twenty-seven patients (42.2%) were submitted to neoadjuvant chemotherapy. Survival time within this group was of 67,7±10,5 months, which was not statistically different from those who performed upfront surgery (survival time 48±5,2 months). Patients with single N2 positive stations had a longer survival time than those with multiple N2 positive stations (p<0.05). Within the group of patients with single N2 disease (n=35), no difference in survival time was found regarding neoadjuvant therapy.

Conclusions: Surgery is effective in selected patients with N2 disease, in particular those with single-N2 positive stations. Neoadjuvant chemotherapy may not grant survival benefit. Adequate pre-operative staging is essential.
description: Portuguese Journal of Cardiac Thoracic and Vascular Surgery, Vol. 30 No. 4 (2023): Oct-Dec
The X-ray activity-rotation relation of T Tauri stars in Taurus-Auriga
Creators: name: Briggs, K. R.
name: Guedel, M.
name: Telleschi, A.
name: Preibisch, Th.
name: Stelzer, B.
name: Bouvier, J.
name: Rebull, L.
name: Audard, M.
name: Scelsi, L.
name: Micela, G.
name: Grosso, N.
name: Palla, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Taurus-Auriga star-forming complex hosts the only population of T Tauri stars in which an anticorrelation of X-ray activity and rotation period has been observed. We have used XMM-Newton's European Photon Imaging Cameras to perform the most sensitive survey to date of X-ray emission (0.3-10 keV) from young stars in Taurus-Auriga and investigate the dependences of X-ray activity measures -- X-ray luminosity, Lx, its ratio with the stellar luminosity, Lx/Lstar, and the surface-averaged X-ray flux, Fxs -- on rotation period. We tested for differences in the distributions of Lx/Lstar of fast and slow rotators, accretors and non-accretors, and compared the dependence of Lx/Lstar on the ratio of the rotation period and the convective turnover timescale, the Rossby number, with that of late-type main-sequence stars. We found significant anticorrelations of Lx and Fxs with rotation period, but these could be explained by the typically higher stellar luminosity and effective temperature of fast-rotators in Taurus-Auriga and a near-linear dependence of Lx on Lstar. We found no evidence for a dependence of Lx/Lstar on rotation period, but for accretors to have lower Lx/Lstar than non-accretors at all rotation periods. The Rossby numbers of accretors and non-accretors were found to be the same as those of late-type main-sequence stars showing saturated X-ray emission. We conclude that non-accreting T Tauri stars show X-ray activity entirely consistent with the saturated activity of late-type main-sequence stars. Accreting T Tauri stars show lower X-ray activity, which cannot be attributed to their slower rotation.
description: 13 pages, 8 figures (14 eps files). Accepted by A&A, to appear in a special section/issue dedicated to the XMM-Newton Extended Survey of the Taurus Molecular Cloud
Partial equivalence of statistical ensembles and kinetic energy
Creators: name: Casetti, Lapo
name: Kastner, Michael
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The phenomenon of partial equivalence of statistical ensembles is illustrated by discussing two examples, the mean-field XY and the mean-field spherical model. The configurational parts of these systems exhibit partial equivalence of the microcanonical and the canonical ensemble. Furthermore, the configurational microcanonical entropy is a smooth function, whereas a nonanalytic point of the configurational free energy indicates the presence of a phase transition in the canonical ensemble. In the presence of a standard kinetic energy contribution, partial equivalence is removed and a nonanalyticity arises also microcanonically. Hence in contrast to the common belief, kinetic energy, even though a quadratic form in the momenta, has a non-trivial effect on the thermodynamic behaviour. As a by-product we present the microcanonical solution of the mean-field spherical model with kinetic energy for finite and infinite system sizes.
description: 21 pages, 11 figures
The dynamics of dense particles in vertical channel flows: gravity, lift and particle clusters
Creators: name: Esteghamatian, Amir
name: Zaki, Tamer A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The dynamics of dense finite-size particles in vertical channel flows of Newtonian and viscoelastic carrier fluids are examined using particle resolved simulations. Comparison to neutrally buoyant particles in the same configuration highlights the effect of settling. The particle volume fraction is $5\%$, and a gravity field acts counter to the flow direction. Despite a modest density ratio ($ρ_r = 1.15$), qualitative changes arise due to the relative velocity between the particle and fluid phases. While dense particles are homogeneously distributed in the core of the channel, the mean concentration profile peaks in the near-wall region due to a competition between shear- and rotation-induced lift forces. These forces act in the cross-stream directions, and are analyzed by evaluating conditional averages along individual particle trajectories. The correlation between the angular and translational velocities of the particles highlights the significance of the Magnus lift force in both the spanwise and wall-normal directions. The collective behaviour of the particles is also intriguing. Using a \Voro analysis, strong clustering is identified in dense particles near the wall, which is shown to alter their streamwise velocities. This clustering is attributed to the preferential transport of aggregated particles towards the wall. The practical implication of the non-uniformity of particle distribution is a significant increase in drag. When the carrier fluid is viscoelastic, the particle migration is enhanced which leads to larger stresses, thus negating the capacity of viscoelasticity to reduce turbulent drag.
description: 26 pages, 19 figures
The Infrared Detection of the Pulsar Wind Nebula in the Galactic Supernova Remnant 3C 58
Creators: name: Slane, P.
name: Helfand, D. J.
name: Reynolds, S. P.
name: Gaensler, B. M.
name: Lemiere, A.
name: Wang, Z.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present infrared observations of 3C 58 with the Spitzer Space Telescope and the Canada-France-Hawaii Telescope. Using the IRAC camera, we have imaged the entire source resulting in clear detections of the nebula at 3.6 and 4.5 microns. The derived flux values are consistent with extrapolation of the X-ray spectrum to the infrared band, demonstrating that any cooling break in the synchrotron spectrum must occur near the soft X-ray band. We also detect the torus surrounding PSR J0205+6449, the 65 ms pulsar that powers 3C 58. The torus spectrum requires a break between the infrared and X-ray bands, and perhaps multiple breaks. This complex spectrum, which is an imprint of the particles injected into the nebula, has considerable consequences for the evolution of the broadband spectrum of 3C 58. We illustrate these effects and discuss the impact of these observations on the modeling of broadband spectra of pulsar wind nebulae.
description: 4 pages, 4 figures, accepted for publication in ApJ Letters