cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Νοηματικός μουσειολογικός σχεδιασμός μουσείου ΠΑΕ ΠΑΟΚ
Creators: name: Αποστόλου, Αλέξανδρος Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Αθλητισμός
Μουσείο
ΠΑΟΚ
Athletic
Museum
PAOK FC

description: Η παρούσα εργασία αποτελεί μια νοηματική μελέτη για τη δημιουργία ενός μουσείου του ποδοσφαιρικού τμήματος της ομάδας του ΠΑΟΚ και αποτελείται από 3 μέρη. Το πρώτο μέρος ξεκινά με τη μουσειολογική αναγνώριση όπου αναλύονται τα χαρακτηριστικά και η ιδιαιτερότητες της συλλογής, διευκρινίζεται ο σκοπός και οι στόχοι του μουσείου και τέλος ορίζεται το κοινό στο οποίο απευθύνεται. Με βάση αυτά διατυπώνεται η κεντρική μουσειολογική ιδέα και το κεντρικό μουσειολογικό σκεπτικό με βάση το οποίο διαμορφώνονται οι ενότητες και οι υποενότητες του σχεδιαζόμενου μουσείου. Στο δεύτερο μέρος της εργασίας διατυπώνεται η ανάλυση του μουσειολογικού σκεπτικού όπως αυτό αποτυπώνεται στις ενότητες της έκθεσης. Σε αυτή την ανάλυση εντάσσονται και τα κείμενα των ενοτήτων που θα βοηθούν τον επισκέπτη στη κατανόηση του θεωρητικού πλαισίου της κάθε ενότητας όπως επίσης και μια λίστα με τις εκθεσιακές μονάδες που η κάθε μια περιέχει. Το τελευταίο μέρος της εργασίας αποτελείται από το παράρτημα που περιέχει τις φωτογραφίες των εκθεσιακών μονάδων κάθε ενότητας με κάποιες περαιτέρω πληροφορίες για το κάθε αντικείμενο, προκειμένου να διευκολύνει τον αναγνώστη στη κατανόηση του νοήματος που το κάθε ένα εξυπηρετεί στο συγκεκριμένο πλαίσιο.
description: The main subject of the present thesis is a case study about the creation of a museum for the football team of PAOK Thessaloniki. The paper is divided in 3 parts. The first part is about learning and analyzing all the unique characteristics and aspects of the collection that we were given. Through this analysis we can define the goal and the objectives of the museum. Using all these we then proceed to the conceptual design of the museum and we form the exhibition accordingly. The second part is the elaborate analysis of the different sections of the designed exhibition. The objects of the collection are divided and placed on different categorized sections inside the exhibition alongside with explanatory texts to form the context which explains the history of PAOK FC. In every chapter of this part of the paper there is a list with the objects of the collection that serves our purpose according to the occasion. The last part is the appendix which contains the photos of every object of the collection divided accordingly to the lists that were formed in the second part of the paper.
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
Ανάλυση του ρόλου της μεθυλοτρανσφεράσης ΕΖΗ2 στη Χρόνια Λεμφοκυτταρική Λευχαιμία
Creators: name: Γιασσαφάκη, Λευκή-Παυλίνα Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Μεθυλοτρανσφεράση
Λευχαιμία
Τεχνολογία επεξεργασίας γονιδιωμάτων CRISPR/Cas9
Methyltransferase
Leukemia
CRISPR/Cas9 genome editing technology

description: Σκοπός της μεταπτυχιακής διατριβής ήταν η διερεύνηση/ανάλυση του ρόλου της μεθυλοτρανσφεράσης των ιστονών ΕΖΗ2 στη Χρόνια Λεμφοκυτταρική Λευχαιμία (ΧΛΛ). Για τις πειραματικές ανάγκες χρησιμοποιήθηκε η καινοτόμος τεχνολογία γονιδιωματικής επεξεργασίας CRISPR/Cas9, η οποία έχει υιοθετηθεί από τα μικροβιακά συστήματα άμυνας. Ειδικότερα, επιδίωξη της παρούσας μελέτης ήταν η στοχευμένη καταστολή της έκφρασης του γονιδίου της μεθυλοτρανσφεράσης ΕΖΗ2 μέσα από δύο ιδιαίτερες μοριακές προσεγγίσεις, αφενός μεν παρεμποδίζοντας, παροδικά, τη διαδικασία μεταγραφής του γονιδίου, αφετέρου δε, τροποποιώντας την αλληλουχία του με στόχο τη σταθερή καταστολή της γονιδιακής έκφρασης. Η στοχευμένη καταστολή της έκφρασης του γονιδίου της ΕΖΗ2 μέσω της τεχνικής CRISPR/Cas9 πραγματοποιήθηκε στην κυτταρική σειρά MEC-1 η οποία αντικατοπτρίζει τα Β λεμφοκύτταρα της ΧΛΛ. Το τελικό αποτέλεσμα ήταν η επιβεβαίωση της καθοριστικής σημασίας της έκφρασης της μεθυλοτρανσφεράσης για την επιβίωση των κυττάρων της ΧΛΛ, γεγονός που ενισχύει την επικρατούσα άποψη, σύμφωνα με την οποία η ΕΖΗ2 προσδίδει πλεονέκτημα επιβίωσης και προστασία από την απόπτωση στα λευχαιμικά κύτταρα και η καταστολή της έκφρασής της και η φαρμακολογική αναστολή της καταλυτικής της δράσης οδηγεί τα κύτταρα σε απόπτωση. Η μελέτη, λοιπόν, της συγκεκριμένης μεθυλοτρανσφεράσης είναι ιδιαιτέρως σημαντική καθώς η καταστολή της θα μπορούσε να αποτελέσει ένα νέο, πιθανό, θεραπευτικό στόχο για συγκεκριμένες ομάδες ασθενών με ΧΛΛ.
description: The aim of the present thesis was to investigate the role of EZH2 histone methyltransferase in Chronic Lymphocytic Leukemia (CLL) via the novel CRISPR/Cas9 genome editing platform. This innovative technology has been developed from the microbial immune systems. In particular, the objective of this study was the alteration of EZH2 gene expression through transient transcriptional repression and also via stable alterations in the gene sequence and consequently the study of the cell phenotype. The targeted perturbation of EZH2 methyltransferase expression using CRISPR/Cas9 platform was performed in the CLL derived MEC-1 cell line. Summarizing, this promising technique provided additional evidence about EZH2 expression and its impact in CLL cell survival. According to evidence, EZH2 expression is associated with CLL cell survival as well as resistance to apoptosis, while downregulation of EZH2 expression or pharmacological inhibition of EZH2 catalytic activity leads to increased cell death. Using the CRISPR/Cas9 technology, we verified that EZH2 expression is crucial for CLL cell survival. On these grounds, EZH2 emerges as a novel potential therapeutic target, at least for specific subgroups of patients with CLL.
Measurement of ion backflow fraction in GEM detectors
Creators: name: Tripathy, A.
name: Sahu, P. K
name: Swain, S.
name: Sahu, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A systematic study is performed to measure the ion backflow fraction of the GEM detectors. The effects of different voltage configurations and Ar/CO_2 gas mixtures, in ratios of 70:30, 80:20 and 90:10, on positive ion fraction are investigated in detail. Moreover, a comparative study is performed between single and quadruple GEM detectors.The ion current with detector effective gain is measured with various field configurations and with three proportions of gas mixtures. The ion backflow fraction for the GEM is substantially reduced with the lower drift field. A minimum ion backflow fraction of 18 % is achieved in the single GEM detector with Ar/CO_2 80:20 gas mixture, however, a minimum ion backflow fraction of 3.5 %, 3.0%, and 3.8 % are obtained for a drift field of 0.1kV/cm with Ar/CO_2 70:30, 80:20 and 90:10 gas mixtures, respectively for quadrupole GEM detector. Similar values of effective gain and ion backflow fraction have been found by calculating the current from pulse height spectrum method, obtained in the Multi Channel Analyser.
description: 24 pages, To be published in Nuclear Instruments and Methods in Physics Research A
Mapping population synthesis event rates on model parameters II: Convergence and accuracy of multidimensional fits
Creators: name: O'Shaughnessy, R.
name: Kalogera, V.
name: Belczynski, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Binary population synthesis calculations and associated predictions, especially event rates, are known to depend on a significant number of input model parameters with different degrees of sensitivity. At the same time, for systems with relatively low formation rates, such simulations are heavily computationally demanding and therefore the needed explorations of the high-dimensional parameter space require major -- often prohibitive -- computational resources. In the present study, to better understand several key event rates involving binary evolution and binaries with two compact objects in Milky Way-like galaxies and to provide ways of reducing the computational costs of complete parameter space explorations: (i) we perform a methodical parameter study of the \emph{StarTrack} population synthesis code ; and (ii) we develop a formalism and methodology for the derivation of {\em multi-dimensional fits} for event rates. We significantly generalize our earlier study, and we focus on ways of thoroughly assessing the accuracy of the fits. We anticipate that the efficient tools developed here can be applied in lieu of large-scale population calculations and will facilitate the exploration of the dependence of rate predictions on a wide range binary evolution parameters. Such explorations can then allow the derivation of constraints on these parameters, given empirical rate constraints and accounting for fitting errors. Here we describe in detail the principles and practice behind constructing these fits, estimating their accuracy, and comparing them with observations in a manner that accounts for their errors.
description: 19 pages, 9 figures, formatted with emulateapj. Submitted to ApJ. v2 has been completely rewritten to improve clarity
Χωρικός μουσειολογικός σχεδιασμός για την περιοδική έκθεση των κειμηλίων της μονής Άγιος Γεώργιος Περιστερεώτα
Creators: name: Τσακμάκη, Μαλαματή Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Μουσειολογία
Χωρικός σχεδιασμός
Εκκλησιαστικά κειμήλια
Museology
Exhibition spatial design
Religious relics

description: Η παρούσα σχεδιαστική εργασία αποσκοπεί στη συγκρότηση μίας ολοκληρωμένης πρότασης χωρικού σχεδιασμού της περιοδικής έκθεσης των κειμηλίων της μονής του Πόντου Άγιος Γεώργιος Περιστερεώτα. Οι επιλογές και οι χειρισμοί της εργασίας εκπορεύονται από τις βασικές κατευθύνσεις που θέτει η σύγχρονη μουσειολογική μεθοδολογία. Επιθυμία είναι η δημιουργία ενός βιωματικού, συνολικού χώρου με επί μέρους περιβάλλοντα, στα οποία οι εκθεσιακές διατάξεις πλαισιώνουν και αναδεικνύουν τόσο τα κειμήλια όσο και τα νοήματα που τους αποδίδονται. Κύριο μέλημα του σχεδιασμού είναι να διαχειριστεί την ανάγκη δημιουργίας δύο γενικών εκθεσιακών περιβαλλόντων, τα οποία γίνονται απευθείας αντιληπτά στον επισκέπτη, ενώ η μετάβαση από το ένα στο άλλο να προκύπτει ομαλά και ευκρινώς. Το κτίριο το οποίο επιλέχθηκε για την εφαρμογή της πρότασης είναι ο εκθεσιακός χώρος του παλιού Διοικητηρίου στο πρώην στρατόπεδο Κόδρα του Δήμου Καλαμαριάς. Το μουσειολογικό σκεπτικό και το νοηματικό περιεχόμενο της έκθεσης αναπτύσσεται στη διπλωματική εργασία του μεταπτυχιακού της Μουσειολογίας «Νοηματικός προγραμματισμός και σχεδιασμός της περιοδικής έκθεσης των κειμηλίων της μονής Άγιος Γεώργιος Περιστερεώτα» της φοιτήτριας Ευδοξίας Καλπατσινίδου.
description: The aim of the present designing thesis is the formation of an integrated suggestion for the spatial design for the temporary exhibition of the relics of the monastery Agios Georgios Peristereota which was located at Pontos. Both design choices and suggested solutions follow the initials of the contemporary museological methodology. Our wish is to create an interior space where the visitor experiences the artificial environment through designed atmospheres where the relics are both highlighted and exist within a context. At the top of the design concept is the formation of two general environments which are perceived spontaneously by the people who enter the exhibition hall. At the same time the transition from the first to the second environment comes smoothly and clearly. The building that was chosen to host our proposal is an abandoned military headquarter. It is located at a former military base which belongs now to the local municipality and the building is often used as an exhibition hall. The museological content of the exhibition is presented at the relative diploma thesis of this master composed by the student Eudoksia Kalpatsinidou.
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
Elucidation of antigenic epitopes on the rubella virus E1 glycoprotein
Creators: name: Chaye, Helena H.
Publisher: name: University of British Columbia
Year: 2008

description: Rubella virus (RV), a positive-stranded RNA virus, is the only member of the genus Rubivirus within the Togaviridae family. The virus consists of a host derived lipid bilayer membrane, membrane glycoprotein spikes, and the C protein which together with viral RNA forms the icosahedral nucleocapsid. Although clinical rubella is a relatively mild disease, RV remains an important human pathogen because of its teratogenic effects in utero which can result in new born infants with congenital rubella syndrome (CRS). Complications such as polyarticular arthralgia and arthritis following vaccination or infection are common and rare cases of progressive panencephalitis have been reported. To obtain a better understanding of the immunopathology of RV infection, the degree of antigenicity of the structural proteins in humans were examined for both cellular and humoral immune responses. It was found that of the structural proteins, El glycoprotein was the dominant antigen recognized by the study population sampled from normal individuals with no history of rubella associated conditions. It was also found that the CRS patients had immune responses distinct from that of the normal population. In CRS patients E2 was the dominant antigen to which both cellular and humoral immune responses were elicited. The implications of these observation with respect to proposed mechanisms of persistent infection are discussed. Twenty three synthetic peptides spanning the entire El sequence were screened with human peripheral blood lymphocytes and the corresponding sera to examine the distribution of antigenic domains. El glycoprotein was also the target of viral neutralizing (VN) and hemagglutinin (HA) epitope mapping studies. Deletion mutants of El were constructed from El cDNAs and expressed in in vitro, in COS cells and in E.coli. The mutants were screened with monoclonal antibodies with VN and HA inhibiting activities. The mutants containing the functional epitopes were further studied by using synthetic peptides. HA epitope was mapped to amino acid residues E1214 to E12„ while two VN epitopes mapped to amino acid residues E1214 to E12, and E1219 to E1232. The potential use of the defined epitopes in the development of subunit vaccine is discussed.
Measurement of the ttbar production cross section in ppbar collisions at sqrt{s} = 1.96 TeV
Creators: name: D0 Collaboration
name: Abazov, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We measure the ttbar production cross section in ppbar collisions at sqrt{s}=1.96 TeV in the lepton+jets channel. Two complementary methods discriminate between signal and background, b-tagging and a kinematic likelihood discriminant. Based on 0.9 fb-1 of data collected by the D0 detector at the Fermilab Tevatron Collider, we measure sigma_ttbar=7.62+/-0.85 pb, assuming the current world average m_t=172.6 GeV. We compare our cross section measurement with theory predictions to determine a value for the top quark mass of 170+/-7 GeV.
description: 7 pages, 3 figures, 5 tables, submitted to Physical Review Letters
Διερεύνηση της Εθελοντικής Αγοράς Αντιστα-θμισμάτων Άνθρακα στην Ελλάδα από Δασοπολιτικής Σκοπιάς
Creators: name: Ζηκούλη, Αθηνά Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Εθελοντική Εμπορία Ρύπων
Δασικά αντισταθμίσματα άνθρακα
Ανθρακικό αποτύπωμα
Voluntary Carbon Market
Forest carbon offsets
Carbon footprint

description: Η κλιματική αλλαγή έχοντας αναγνωριστεί ως μία από τις μεγαλύτερες παγκόσμιες προκλήσεις του αιώνα που διανύουμε σηματοδοτεί πώς χρήζει δημόσια διαβούλευση και συλλογική δράση. Ειδικότερα η αποψίλωση των δασών παραθέτει μεγάλους κινδύνους απελευθέρωσης εκπομπών παγκοσμίως και ήδη εντός Ευρωζώνης αναζητούνται λύσεις μετριασμού και προσαρμογής. Μία δέουσα λύση που χρησιμοποιείται κατά κόρων είναι η αντιστάθμιση εκπομπών με την αγορά δασικών αντισταθμισμάτων τόσο από εταιρίες όσο και από ιδιώτες. Έχοντας λοιπόν ως σκοπό την αξιολόγηση της Εθελοντικής Αγοράς Αντισταθμισμάτων Άνθρακα μέσω δασοπονικών χειρισμών, αναζητήθηκαν όλοι οι Ευρωπαϊκοί πάροχοι που υλοποιούν δασικά προγράμματα. Πιο συγκεκριμένα, η μεθοδολογία που εφαρμόστηκε είναι σύγκριση περιεχομένου και η έρευνα αφορά την ανάλυση των πληροφοριών που διαθέτουν στους διαδικτυακούς τους ιστοχώρους και τα δασοπονικά προγράμματα που υλοποιούν. Ακόμη, οι εκτελεστές έργων που μελετήθηκαν προσφέρουν στο ευρύ κοινό την δυνατότητα να υπολογίσει ανώνυμα το ανθρακικό αποτύπωμα του και τα αποτελέσματα που προέκυψαν συγκρίθηκαν σύμφωνα με την Ευρωπαϊκή Νομοθεσία και διεθνή αναγνωρισμένες μεθοδολογίες - πρότυπα. Τέλος, έγινε καταγραφή όλων των θετικών χαρακτηριστικών που παρουσιάζουν οι Ευρωπαϊκοί εκτελεστές δασοπονικών έργων και δόθηκαν προτάσεις που θα μπορούσε να εφαρμόσει ένας οργανισμός- πάροχος που θα ενδιαφερόταν να αναλάβει αντίστοιχους δασοπονικούς χειρισμούς στην Ελλάδα.
description: Climate Change is recognized as one of the greatest challenges of our century, therefore it is certain that public consultation and collective action are needed in order to deal with the situation. In particular, deforestation leads to the high risk of the release of carbon emissions universally and at the moment there is research into solutions such as mitigation and adaptation within European Zone. One effective method that is most frequently used is carbon offsetting, where companies and private customers buy carbon offsets from forest projects. The aim of this dissertation is to evaluate the Voluntary Carbon Market through forest carbon projects and the research is focused on the European forest developers. In fact, the methodology is comparative content analysis and the survey concerns information reviewed from their websites and the forest carbon projects that have been organized. Additionally, the European forest developers who provided anonymous, online carbon offsetting were selected and the results were compared with the European legislation and globally recognized methodologies- standards. Finally, all the positive features that the European forest developers discovered were recorded and a proposal is presented which could be used by an organization interested in developing forest carbon projects in Greece.
Spectroscopy and photometry of the least-massive Type-II globular clusters: NGC1261 AND NGC6934
Creators: name: Marino, A. F.
name: Milone, A. P.
name: Renzini, A.
name: Yong, D.
name: Asplund, M.
name: Da Costa, G. S.
name: Jerjen, H.
name: Cordoni, G.
name: Carlos, M.
name: Dondoglio, E.
name: Lagioia, E. P.
name: Jang, S.
name: Tailo, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent work has revealed two classes of Globular Clusters (GCs), dubbed Type-I and Type-II. Type-II GCs are characterized by a blue- and a red- red giant branch composed of stars with different metallicities, often coupled with distinct abundances in the slow-neutron capture elements (s-elements). Here we continue the chemical tagging of Type-II GCs by adding the two least-massive clusters of this class, NGC1261 and NGC6934. Based on both spectroscopy and photometry, we find that red stars in NGC1261 are slightly enhanced in [Fe/H] by ~0.1 dex and confirm that red stars of NGC 6934 are enhanced in iron by ~0.2 dex. Neither NGC1261 nor NGC6934 show internal variations in the s-elements, which suggests a GC mass threshold for the occurrence of s-process enrichment. We found a significant correlation between the additional Fe locked in the red stars of Type-II GCs and the present-day mass of the cluster. Nevertheless, most Type II GCs retained a small fraction of Fe produced by SNe II, lower than the 2%; NGC6273, M54 and omega Centauri are remarkable exceptions. In the appendix, we infer for the first time chemical abundances of Lanthanum, assumed as representative of the s-elements, in M54, the GC located in the nucleus of the Sagittarius dwarf galaxy. Red-sequence stars are marginally enhanced in [La/Fe] by 0.10\pm0.06 dex, in contrast with the large [La/Fe] spread of most Type II GCs. We suggest that different processes are responsible for the enrichment in iron and s-elements in Type-II GCs.
description: 22 pages, 10 figures, submitted
Positivity-preserving third order DG schemes for Poisson--Nernst--Planck equations
Creators: name: Liu, Hailiang
name: Wang, Zhongming
name: Yin, Peimeng
name: Yu, Hui
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this paper, we design and analyze third order positivity-preserving discontinuous Galerkin (DG) schemes for solving the time-dependent system of Poisson--Nernst--Planck (PNP) equations, which has found much use in diverse applications. Our DG method with Euler forward time discretization is shown to preserve the positivity of cell averages at all time steps. The positivity of numerical solutions is then restored by a scaling limiter in reference to positive weighted cell averages. The method is also shown to preserve steady states. Numerical examples are presented to demonstrate the third order accuracy and illustrate the positivity-preserving property in both one and two dimensions.
description: 7 figures, 16 tables
Resolving the circumstellar environment of the Galactic B[e] supergiant star MWC 137. II. Nebular kinematics and stellar variability
Creators: name: Kraus, Michaela
name: Liimets, Tiina
name: Moiseev, Alexei
name: Arias, Julieta P. Sanchez
name: Nickeler, Dieter H.
name: Cidale, Lydia S.
name: Jones, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Galactic B[e] supergiant MWC 137 is surrounded by a large-scale optical nebula. To shed light on the physical conditions and kinematics of the nebula, we analyze the optical forbidden emission lines [NII] 6548,6583 and [SII] 6716,6731 in long-slit spectra taken with ALFOSC at the Nordic Optical Telescope. The radial velocities display a complex behavior but, in general, the northern nebular features are predominantly approaching while the southern ones are mostly receding. The electron density shows strong variations across the nebula with values spreading from about zero to ~800 cm$^{-3}$. Higher densities are found closer to MWC~137 and in regions of intense emission, whereas in regions with high radial velocities the density decreases significantly. We also observe the entire nebula in the two [SII] lines with the scanning Fabry-Perot interferometer attached to the 6-m telescope of the Special Astrophysical Observatory. These data reveal a new bow-shaped feature at PA = 225-245 and a distance 80" from MWC 137. A new H$α$ image has been taken with the Danish 1.54-m telescope on La Silla. No expansion or changes in the nebular morphology appear within 18.1 years. We derive a mass of 37 (+9/-5) solar masses and an age of $4.7\pm0.8$ Myr for MWC 137. Furthermore, we detect a period of 1.93 d in the time series photometry collected with the TESS satellite, which could suggest stellar pulsations. Other, low-frequency variability is seen as well. Whether these signals are caused by internal gravity waves in the early-type star or by variability in the wind and circumstellar matter currently cannot be distinguished.
description: 18 pages, 12 figures, Table 1 is only available in electronic form, submitted to AJ
Ferromagnetism in the t-t' Hubbard model: interplay of lattice, band dispersion, and interaction effects studied within a Goldstone-mode preserving scheme
Creators: name: Pandey, Sudhakar
name: Singh, Avinash
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Ferromagnetism in the Hubbard model is investigated on sc, bcc, and fcc lattices using a systematic inverse-degeneracy ($1/{\cal N}$) expansion which incorporates self-energy and vertex corrections such that spin-rotation symmetry and the Goldstone mode are explicitly preserved. First-order quantum corrections to magnon energies are evaluated for several cases, providing a comprehensive picture of the interplay of lattice, band dispersion, and interaction effects on the stability of the ferromagnetic state with respect to both long- and short-wavelength fluctuations. Our results support the belief that ferromagnetism is a generic feature of the Hubbard model at intermediate and strong coupling provided the DOS is sufficiently asymmetric and strongly peaked near band edge, as for fcc lattice with finite $t'$. For short-wavelength modes, behavior of a characteristic energy scale $ω^* \sim T_c$ (magnon-DOS-peak energy) is in excellent agreement with the $T_c$ vs. $n$ behavior within DMFT, both with respect to the stable range of densities ($0.20 < n < 0.85$) as well as the optimal density $n=0.65$. However, our finding of vanishing spin stiffness near optimal density highlights the role of long-wavelength fluctuations in further reducing the stable range of densities.
description: 9 pages, 7 figures
Φορολογικοί έλεγχοι και δικαιώματα φορολογούμενων υπό τον Κώδικα Φορολογικής Διαδικασίας Ν. 4174/2013
Creators: name: Βενετόπουλος, Ιωάννης Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Φορολογία
Φορολογικοί έλεγχοι
Δικαιώματα φορολογούμενων
Taxation
Tax controls
Taxpayer’s rights

description: Η φορολογική πολιτική αποτελεί ισχυρό μέσο για την αντιμετώπιση των διαταραχών του οικονομικού συστήματος, έτσι η μείωση της φορολογίας μπορεί να έχει ως αποτέλεσμα την αύξηση της αγοραστικής δύναμης των ιδιωτών, που με τη σειρά της θα οδηγήσει στην αύξηση της ζήτησης αγαθών και μέσω αυτής στην αύξηση της παραγωγής. Η φοροδιαφυγή συνιστά κεφαλαιώδες πρόβλημα για τη δημοσιονομική ισορροπία κάθε κράτους, αφού στερεί την πολιτεία από έσοδα και προκαλεί έμμεσα στρεβλώσεις στη φορολογική επιβάρυνση των διοικούμενων. Αντικείμενο της παρούσας εργασίας αποτελεί στο πρώτο μέρος η ανάλυση του νομοθετικού πλαισίου των φορολογικών ελέγχων και συγκεκριμένα: τα είδη των φορολογικών ελέγχων, η αρμοδιότητα διενέργειας των φορολογικών ελέγχων, η επιλογή των υποθέσεων προς έλεγχο αλλά και οι εξουσίες της φορολογικής διοίκησης στο πλαίσιο των φορολογικών ελέγχων. Επίσης, ιδιαίτερη αναφορά γίνεται στην κατ’ οίκον φορολογική έρευνα κατά το άρθρο 25 παρ. 3 ΚΦΔ, στον έμμεσο προσδιορισμός της φορολογητέας ύλης, στα αποτελέσματα του φορολογικού ελέγχου, στον προσδιορισμό του φόρου και τέλος στη νομοθεσία περί φορολογικών ελέγχων σε άλλες έννομες τάξεις. Ενώ στο δεύτερο μέρος αναλύονται τα δικαιώματα του φορολογούμενου στο πλαίσιο των φορολογικών ελέγχων, ειδικότερα εξετάζονται: το δικαίωμα προηγούμενης ακρόασης , το δικαίωμα ανταπόδειξης του φορολογούμενου, το δικαίωμα πληροφόρησης και πρόσβασης του φορολογούμενου και τέλος η εφαρμογή της ΕΣΔΑ στις φορολογικές διαφορές.
description: Taxation provides a powerful mechanism of treating the defects of the economic system and, in this vein, taxation reduction can have the effect of increasing individuals' purchasing power, facilitating in turn an increased demand for goods and thus a productivity rise. Tax evasion becomes a crucial problem with respect to the fiscal balances of countries, since it deprives the State of revenues and, by implication, has a distortionary impact on citizens’ tax burden. This paper examines in its first part the legal framework governing tax audits; namely, the types of tax audits, the tax auditing competence, the selection of cases for audit, as well as the tax-audit power of the administration. Moreover, particular reference is made to the onsite inspections of the debtors’ premises pursuant to Article 25 para.3 of TPC, the indirect determination of the tax base method, the results of the tax audits, the tax assessment and determination methods, and the legislation regulating tax audits in other jurisdictions. In the second part of this dissertation, then, we proceed to investigate the taxpayer’s rights in the face of tax audits. Therefore, we examine the right to prior hearing, the right to rebuttal, the rights to information and access, and lastly the application of the ECHR to tax disputes.
The analysis of slant-from-texture in early vision
Creators: name: Aks, Deborah J.
Publisher: name: University of British Columbia
Year: 2008

description: A considerable amount of research exists on the subjective perception of three-dimensional structure from texture gradients. The present set of experiments extends these tests of phenomenal perception by examining the underlying processes used in interpreting slant-from-texture. The first two experiments show that measures of subjective perception predict speeded performance in a visual search task, and that the mediating representation relies on an assumption of projective size (i.e., discriminating the size of the target is difficult when the short target is far or the long target is near). The third experiment shows that sensitivity to apparent depth in the texture display is present even in rapid and parallel search conditions where early vision is known to operate. The fourth experiment assesses the relative contribution of two dominant dimensions of the texture gradient -- "perspective" (i.e., a radial pattern) and "compression" (i.e., a foreshortened pattern). Both dimensions are detected by early vision as signals for apparent depth. The fmal experiment examines how early vision codes these two dimensions. Sternberg's (1969) Additive Factors Method (AFM) is used to assess separability of encoding, and Blalock's path analysis (1962, 1985) is used to examine the order of encoding. AFM shows that perspective and compression have independent influences on search performance in the most rapid search conditions, but that their interaction increases as search slows. The path analysis shows further that when both texture dimensions are available, perspective exerts a more immediate and perhaps even an exclusive influence on performance. These findings support the view that perspective and compression are coded separately at the earliest stages of visual processing and share a common code only later in visual processing.
Molecular dynamics simulation of rapid solidification of Aluminum under pressure
Creators: name: Sarkar, A.
name: Barat, P.
name: Mukherjee, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Molecular dynamics simulation study based on the EAM potential is carried out to investigate the effect of pressure on the rapid solidification of Aluminum. The radial distribution function is used to characterize the structure of the Al solidified under different pressures. It is indicated that a high pressure leads to strong crystallization tendency during cooling.
Automatic O(a) improvement for twisted-mass QCD in the presence of spontaneous symmetry breaking
Creators: name: Aoki, Sinya
name: Bar, Oliver
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: In this paper we present a proof for automatic O(a) improvement in twisted mass lattice QCD at maximal twist, which uses only the symmetries of the leading part in the Symanzik effective action. In the process of the proof we clarify that the twist angle is dynamically determined by vacuum expectation values in the Symanzik theory. For maximal twist according to this definition, we show that scaling violations of all quantities which have non-zero values in the continuum limit are even in a. In addition, using Wilson Chiral Perturbation Theory (WChPT), we investigate this definition for maximal twist and compare it to other definitions which were already employed in actual simulations.
description: 36 pages, no figures
Integration des Standardmodells und der Standardkosmologie aus der Alpha-Omega-Theorie
Creators: name: Wingert, Markus
Publisher: name: Zenodo
Year: 2025
Subjects: Alpha-Omega-Theorie
Standardmodell der Teilchenphysik
Standardkosmologie
Emergenz
Phasenkohärenz
Interferenzstruktur
Quantenfeldtheorie
Gravitation
Symmetriebrechung
Chronostruktur
Theoretische Physik
Struktur der Realität

description: This work is thematically associated with the Alpha-Omega-Theory community on Zenodo.

Short summary: This work reconstructs the Standard Model and standard cosmology as necessary emergent structures from the Alpha-Omega Theory (https://zenodo.org/records/15178575), based on coherent informational interference.

Diese Arbeit zeigt, dass die vollständige Struktur des Standardmodells der Teilchenphysik sowie die Standardkosmologie als notwendige Folge einer tieferliegenden phasenkohärenten Interferenzstruktur erklärbar sind. Basierend auf der Alpha-Omega-Theorie (https://zenodo.org/records/15178575) werden alle wesentlichen Elemente – von Teilchenklassen und Eichgruppen bis hin zur Lagrangedichte und Kosmologie – als emergente Stabilitätsmoden innerhalb einer überlagerten Chronostruktur hergeleitet. Die Arbeit liefert eine systematische Rekonstruktion des Standardmodells ohne freie Parameter und erläutert die fundamentale Natur von Feldern, Massen, Symmetriebrechung und Quantisierung aus einem strukturellen Prinzip heraus. Darüber hinaus werden experimentell überprüfbare Vorhersagen formuliert, die über das Standardmodell hinausgehen. Die Alpha-Omega-Theorie bietet damit erstmals ein vollständig strukturbasiertes, kohärentes Modell der physikalischen Realität.

Sprache: Deutsch
A red giant branch common envelope evolution scenario for the exoplanet WD 1856 b
Creators: name: Merlov, Ariel
name: Bear, Ealeal
name: Soker, Noam
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We propose a common envelope evolution (CEE) scenario where a red giant branch (RGB) star engulfs a planet during its core helium flash to explain the puzzling system WD 1856+534 where a planet orbits a white dwarf (WD) of mass 0.52Mo with an orbital period of 1.4 day. At the heart of the scenario is the recently proposed assumption that the vigorous convection that core helium flash of RGB stars drive in the core excite waves that propagate and deposit their energy in the envelope. Using the binary-MESA stellar evolution code we show that this energy deposition substantially reduces the binding energy of the envelope and causes its expansion. We propose that in some cases RGB stars might engulf massive planets of ~0.01Mo during their core helium flash phase, and that the planet can unbind most of the mass of the bloated envelope. We show that there is a large range of initial orbital radii for which this scenario might take place under our assumptions. This scenario is relevant to other systems of close sub-stellar objects orbiting white dwarfs, like the brown dwarf-WD system ZTFJ003855.0+203025.5.
description: Accept for publication in The Astrophysical Journal Letters
Levinson's theorem for Schroedinger operators with point interaction: a topological approach
Creators: name: Kellendonk, Johannes
name: Richard, Serge
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this note Levinson theorems for Schroedinger operators in R^n with one point interaction at 0 are derived using the concept of winding numbers. These results are based on new expressions for the associated wave operators.
description: 7 pages
Context-Aware Attention-Based Data Augmentation for POI Recommendation
Creators: name: Li, Yang
name: Luo, Yadan
name: Zhang, Zheng
name: Sadiq, Shazia W.
name: Cui, Peng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: With the rapid growth of location-based social networks (LBSNs), Point-Of-Interest (POI) recommendation has been broadly studied in this decade. Recently, the next POI recommendation, a natural extension of POI recommendation, has attracted much attention. It aims at suggesting the next POI to a user in spatial and temporal context, which is a practical yet challenging task in various applications. Existing approaches mainly model the spatial and temporal information, and memorize historical patterns through user's trajectories for recommendation. However, they suffer from the negative impact of missing and irregular check-in data, which significantly influences the model performance. In this paper, we propose an attention-based sequence-to-sequence generative model, namely POI-Augmentation Seq2Seq (PA-Seq2Seq), to address the sparsity of training set by making check-in records to be evenly-spaced. Specifically, the encoder summarises each check-in sequence and the decoder predicts the possible missing check-ins based on the encoded information. In order to learn time-aware correlation among user history, we employ local attention mechanism to help the decoder focus on a specific range of context information when predicting a certain missing check-in point. Extensive experiments have been conducted on two real-world check-in datasets, Gowalla and Brightkite, for performance and effectiveness evaluation.
The Thurston polytope for four-stranded pretzel links
Creators: name: Licata, Joan E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57R (Primary); 57M25, 53D (Secondary)

description: In this paper we use Heegaard Floer link homology to determine the dual Thurston polytope for pretzel links of the form P(-2r_1-1, 2q_1, -2q_2, 2r_2+1) where r_i and q_i are positive integers. We apply this result to determine the Thurston norms of spanning surfaces for the individual link components, and we explicitly construct norm-realizing examples of such surfaces.
The physics of gas phase metallicity gradients in galaxies
Creators: name: Sharda, Piyush
name: Krumholz, Mark R.
name: Wisnioski, Emily
name: Forbes, John C.
name: Federrath, Christoph
name: Acharyya, Ayan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a new model for the evolution of gas phase metallicity gradients in galaxies from first principles. We show that metallicity gradients depend on four ratios that collectively describe the metal equilibration timescale, production, transport, consumption, and loss. Our model finds that most galaxy metallicity gradients are in equilibrium at all redshifts. When normalized by metal diffusion, metallicity gradients are governed by the competition between radial advection, metal production, and accretion of metal-poor gas from the cosmic web. The model naturally explains the varying gradients measured in local spirals, local dwarfs, and high-redshift star-forming galaxies. We use the model to study the cosmic evolution of gradients across redshift, showing that the gradient in Milky Way-like galaxies has steepened over time, in good agreement with both observations and simulations. We also predict the evolution of metallicity gradients with redshift in galaxy samples constructed using both matched stellar masses and matched abundances. Our model shows that massive galaxies transition from the advection-dominated to the accretion-dominated regime from high to low redshifts, which mirrors the transition from gravity-driven to star formation feedback-driven turbulence. Lastly, we show that gradients in local ultraluminous infrared galaxies (major mergers) and inverted gradients seen both in the local and high-redshift galaxies may not be in equilibrium. In subsequent papers in this series, we show that the model also explains the observed relationship between galaxy mass and metallicity gradients, and between metallicity gradients and galaxy kinematics.
description: 16 figures, 3 appendices, 28 pages. MNRAS, in press; v2 - updated references
Characterization of the magnetic field through the three-body loss near a narrow Feshbach resonance
Creators: name: Chen, Yang
name: Peng, Shuai
name: Gong, Hongwei
name: Zhang, Xiao
name: Li, Jiaming
name: Luo, Le
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The narrow s-wave Feshbach resonance of a $^6$Li Fermi gas shows strong three-body loss, which is proposed to be used to measure the minute change of a magnetic field around the resonance. However, the eddy current will cause ultracold atom experiencing a magnetic field delayed to the desired magnetic field from the current of the magnetic coils. The elimination of the eddy current effect will play a key role in any experiments that motivated to measure the magnetic field to the precision of a part per million stability. Here, we apply a method to correct the eddy current effect for precision measurement of the magnetic field. We first record the three-body loss influenced by the effect of induced eddy current, then use a certain model to obtain the time constant of the actual magnetic field by fitting the atom loss. This precisely determines the actual magnetic field according to the time response of the three-body loss. After that, we implement the desired magnetic field to the atoms so that we can analyze the three-body loss across the whole narrow Feshbach resonance. The results show that the three-body recombination is the dominated loss mechanism near the resonance. We expect this practical method of correcting the eddy current error of the magnetic field can be further applied to the future studies of quantum few- and many-body physics near a narrow Feshbach resonance.
Detection of interaction-induced nonlocal effects using perfectly transmitting nanostructures
Creators: name: Weinmann, Dietmar
name: Jalabert, Rodolfo A.
name: Freyn, Axel
name: Ingold, Gert-Ludwig
name: Pichard, Jean-Louis
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider one-dimensional transport through an interacting region in series with a point-like one-body scatterer. When the conductance of the interacting region is perfect, independently of the interaction strength, a nonlocal interaction effect yields a total conductance of the composed system that depends on the interaction strength and is lower than the transmission of the one-body scatterer. This qualitative nonlocal effect allows to probe the dressing cloud of an interacting system by ideal noninteracting leads. The conductance correction increases with the strength of the interaction and the reflection of the one-body scatterer (attaining relative changes >50%), and decreases with the distance between the interacting region and the one-body scatterer. Scaling laws are obtained and possible experimental realizations are suggested.
description: 6 pages, 6 figures
Spectral indices of Galactic radio loops between 1420, 820 and 408 MHz
Creators: name: Borka, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper the average brightness temperatures and surface brightnesses at 1420, 820 and 408 MHz of the six main Galactic radio-continuum loops are derived, as are their radio spectral indices. The temperatures and surface brightnesses of the radio loops are computed using data taken from radio continuum surveys at 1420, 820 and 408 MHz. We have demonstrated the reality of Loops V and VI and present diagrams of their spectra for the first time. We derived the radio spectral indices of Galactic radio loops from radio surveys at three frequencies (1420, 820 and 408 MHz) and confirm them to be non-thermal sources. Diameters and distances of Loops I-VI were also calculated. The results obtained are in good agreement with current theories of supernova remnant (SNR) evolution and suggest that radio loops may have a SNR origin.
description: 10 pages, 5 tables, 13 figures. Accepted for publication in MNRAS
10η Γενική Συνέλευση του Π.Σ.Ε., Μπουσάν 2013. Η μεταμορφωτική θεολογία υπέρ της ζωής του σύμπαντος κόσμου
Creators: name: Καρανάτσιου, Μαρία Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Μπουσάν 2013
Μεταμορφωτική θεολογία
Οικονομία της Ζωής
Busan 2013
Transformative theology
Economy of Life

description: Σκοπός της διατριβής ήταν η αποτύπωση της οικουμενικής προσπάθειας, όπως αποκρυσταλλώθηκε από την ίδρυση του Παγκοσμίου Συμβουλίου Εκκλησιών το 1948, με ιδιαίτερη έμφαση στη 10η Γενική Συνέλευση που έλαβε χώρα στο Μπουσάν της Νότιας Κορέας το 2013. Για το λόγο αυτό, επιλέξαμε να ακολουθήσουμε μία χρονολογική και γραμμική απεικόνιση των δράσεων που αναπτύχθηκαν στο πλαίσιο της οικουμενικής κίνησης. Επιπλέον, εξετάσαμε την έννοια της μεταμορφωτικής θεολογίας, ως διαδικασίας που εξελίσσεται συνεχώς και αποσκοπεί στην εν πράγμασι αλλαγή του τρόπου σκέψης και δράσης όσων σήμερα θέλουν να λέγονται Χριστιανοί, σύμφωνα με τη διδασκαλία και το έργο του Λόγου του Θεού. Μας απασχόλησε, επίσης, το ευρύτερο εννοιολογικό περιεχόμενο της μεταμόρφωσης, αλλά και η κοσμική διάσταση της Μεταμορφώσεως του Σωτήρος. Τέλος, επιδιώξαμε να παρουσιάσουμε την έννοια της μεταμορφωτικής θεολογίας υπό το πρίσμα της 10ης Γ.Σ. του Π.Σ.Ε. στο Μπουσάν και να καταδείξουμε τι σημαίνει, ρεαλιστικά και πρακτικά, η αλλαγή του τρόπου σκέψης και δράσης της ανθρωπότητας, κυρίως αναφορικά με δύο πολύ σημαντικές πτυχές του επιστητού: την οικονομία και το περιβάλλον.
description: The aim of the present dissertation was to describe the ecumenical efforts of the World Council of Churches since its foundation in 1948, with special emphasis on the 10th General Assembly organized in Busan, South Korea in 2013. Therefore, we chose a chronological and linear depiction of the actions undertaken within the Ecumenical Movement. Furthermore, we examined the concept of transformative theology, as a continuous process that aims at the actual change of the way of thinking and acting of those who claim that they are Christians, according to the teachings and the life of the Word of God. We also focused on the broader conceptual meaning of transformation, especially in regard to the cosmic dimension of the Transfiguration of Jesus Christ. Moreover, we tried to present the relation of transformative theology and the 10th General Assembly in Busan, as well as to show what it means, in practice, the change of mentality and action for humanity in regard to two important factors: economy and environment.
Stringiness of Hyaluronic Acid Emulsions
Creators: name: Kibbelaar, H. V. M.
name: Deblais, A.
name: Velikov, K. P.
name: Bonn, D.
name: Shahidzadeh, N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: In this work, we underline the importance of the molecular weight of hyaluronic acid on the elongational properties of concentrated emulsions. The filament formation properties, e.g. the stringiness, of an emulsion is a key determinant of a product liking and repeat purchase. Here, we find that high molecular weight hyaluronic acid and a high stretching speed are the control parameters affecting the filament formation of an emulsion.
description: 15 pages, 4 figures. Published in International Journal of Cosmetic Science, 2021