cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Μελέτη των δυναμικών ιδιοτήτων εδαφών στη συσκευή στήλης-συντονισμού
Creators: name: Καλλιόγλου, Πολυξένη Α.
Publisher: name: Aristotle University of Thessaloniki
Year: 2003
Subjects: Συσκευή στήλης-συντονισμού
Δυναμικές ιδιότητες
Μέτρο διάτμησης
Λόγος στρεπτικής απόσβεσης
Διατμητική παραμόρφωση
Οριακή ελαστική παραμόρφωση
Resonant-column apparatos
Dynamic properties
Shear modulus
Shear damping ratio
Shear strain
Elastic threshold strain

description: Στόχος της εργασίας που παρουσιάζεται στη διατριβή αυτή είναι η διερεύνηση των δυναμικών ιδιοτήτων φυσικών εδαφών από την Ελλάδα και την Κύπρο στη συσκευή στήλης-συντονισμού. Ειδικότερα, προσδιορίστηκε το μέτρο διάτμησης, G, και ο λόγος στρεπτικής απόσβεσης, DT, σε ανόργανα και οργανικά καθώς επίσης και συμπυκνωμένα εδάφη και μελετήθηκε η επίδραση διάφορων παραμέτρων, όπως η ενεργή ισότροπη τάση, η διατμητική παραμόρφωση, η πλατικότητα και η εδαφική σύνθεση και δομή στις ιδιότητες αυτές. Η διαθεσιμότητα ενός σχετικά μεγάλου αριθμού δεδομένων σε φυσικά εδάφη επιτρέπει τον υπολογισμό συσχετίσεων μεταξύ των φυσικών και δυναμικών ιδιοτήτων και αποβλέπει στη δημιουργία μιας βάσης δεδομένων. Αναλυτικότερα, σε συσχετίσεις αυτές αφορούν στο μέγιστο μέτρο διάτμησης, Gmax, στον ελάχιστο λόγο στρεπτικής απόσβεσης, DTmin, στη μεταβολή του μέτρου διάτμησης, G, και του λόγου στρεπτικής απόσβεσης, DT, με τη διατμητική παραμόρφωση, και στην αύξηση της πίεσης του ύδατος των πόρων, Δu, κατά την δυναμική φόρτιση
description: The purpose of the work presented in this thesis is the investigation of dynamics properties of natural soils from Greece and Cyprus in the resonant-column apparatus. Specifically, the shear modulus, G, and shear dampines ratio, DT, of enorganic and organic as well as compacted soils, were determined and the effect of various parameters such as effective isotropic stress, shear strain, plasticity, soil composition and structure, on the above properties was studied. The availabiblity of a large number of data of natural soils allowed the establishement of empirical correlations between dynamic and physical properties, allowing thus the establishment of a database. In particular, such correlations were established for the small-strain shear modulus, Gmax, the damping ratio, DTmin, the variation of shear modulus, G, and damping ration, DT, with shear strain, and the excess pore water pressure development, Δu, during dynamic loading
Παλαιομαγνητικές και μαγνητικές ιδιότητες ιζημάτων και υποβάθρου σε πυρήνες γεωτρήσεων από τον Β. Ελλαδικό χώρο: συμβολή στη διερεύνηση των συνθηκών διαγένεσης
Creators: name: Αηδόνα, Ελένη Β.
Publisher: name: Aristotle University of Thessaloniki
Year: 2002
Subjects: Μαγνητικές ιδιότητες ιζημάτων
Magnetic properties of sediments

description: Αντικείμενο αυτής της διδακτορικής διατριβής είναι η παλαιομαγνητική έρευνα και η μελέτη των μαγνητικών ιδιοτήτων των ιζημάτων που προέρχονται από 13 γεωτρήσεις στη Χαλκιδική. Μετρήθηκε η παραμένουσα μαγνητική και η μαγνητική επιδεκτικότητα όλων των δειγμάτων. 390 δείγματα υποβλήθηκαν σε μαγνητικό καθαρισμό τόσο με εναλλασόμενο πεδίο όσο και με θέρμανση και προέκυψε ότι το κύριο μαγνητικό ορυκτό είναι ο μαγνητίτης. Επιπλέον έγιναν μετρήσεις ισόθερμης παραμένουσας μαγνήτισης και θερμομαγνητικές αναλύσεις οι οποίες επιβεβαίωσαν τον μαγνητίτη. Τέλος πραγματοποιήθηκαν 30 λεπτές τομές από τις οποίες έγινε φανερή η ύπαρξη μαγνητίτη και πυρίτη σε βοτρυοειδή μορφή. Στη συνέχεια έγινε προσπάθεια επαναπροσανατολισμού των δειγμάτων με τη μέθοδο της ανισοτροπίας και τη μέθοδο της ιξώδους μαγνήτισης. Τελικά υπολογίσθηκαν οι μέσες τιμές των εγκλίσεων και είναι : I=32.9(+),(-)5.6 για το Ολιγόκαινο, Ι=44.3[+5.2,-4.7] για το Ηωκαινο και Ι=31.1[+7.9,-6.9] για το Ιουρασικό υπόβαθρο. Οι τιμές αυτές συγκρίθηκαν με τις αντίστοιχες τιμές που προκύπτουν από επιφανειακούς σχηματισμούς για την ίδια περιοχή και διαπιστώθηκε ότι υπάρχει καλή συμφωνία των τιμών της έγκλισης με τα αποτελέσματα άλλων ερευνητών
description: A detailed palaeomagnetic investigation was performed on sediments cores from 13 deep boreholes from the Chalkidiki peninsula. Both magnetic susceptibility and intensity of the magnetisation indicate weakly magnetised materials. 390 samples have been subjected to either stepwise thermal or alternative field demagnetization. Both procedures indicate that the NEM is carried by magnetic. Isothermal remanent magnetization acquition curves and thermomagnetic analysis suggest the dominance of magnetite. 30 thin sections were studied and revealed the presence of magnetic and pyrite in framboidal form. An attempt to re-orient some of the anisotropy method. The mean inclination values which are obtained from the present thesis are : I=32.9[+5.6,-5.6], for Oligocene formations I=44.3[+5.2, -4.7] for Eocene formations and I=31.1[+7.9, -6.9]Jurassic basement. These values are compared with published data for the broader area and seem to be in good agreement with the overall pattern
Τα γεωγραφικά συστήματα πληροφοριών στην οργάνωση, επεξεργασία και διαχείριση της εκπαίδευσης μέσω ανθρωποκεντρικής και χωρικής προσέγγισης
Creators: name: Ανδρουλιδάκη, Μαρία
Publisher: name: Aristotle University of Thessaloniki
Year: 2003
Subjects: G.S.I.

description: Η διατριβή επιχειρεί θεωρητική προσέγγιση στη δεοωτολογία , το χωροταξικό σχεδιασμό, τη σημασία των ανθρωπογεωγραφικών χαρακτηριστικών, τη μελέτη εκπαιδευτικών εγκαταστάσεων, τις δυνατότητες των Γ.Σ.Π. στη μελέτη της εκπαίδευσης και τους βασικούς δείκτες της απόδοσης των εκπαιδευτικών συστημάτων. Αναλύονται πέντε ενδεικτικά επίπεδα αναφοράς που αντιπροσωπεύουν τις κλίμακες μελέτης(παγκόσμια κατάσταση, χώρα, μεγάλο αστικό κέντρο, μικρός οικισμός και ιδρύματα), ενώ οι προσεγγίσεις είναι χαρακτηριστικές των διαφορετικών δυνατοτήτων που υπάρχουν σε κάθε περίπτωση. Το είδος και ο τρόπος οργάνωσης των απαραίτητων δεδομένων, ώστε να είναι εύκολη και αποδοτική η χρήση τους, είναι ένα θέμα που γίνεται προσπάθεια να συστηματοποιηθεί. Προτείνονται τρόποι καταγραφής και το λογισμικό που απαιτείται για την αυτοματοποιημένη επεξεργασία, ενώ τέλος αξιοποιούνται τα αποτελέσματα με χρήση Γ.Σ.Π. για εξαγωγή συμπερασμάτων, έλεγχο κάλυψης κριτηρίων και προτάσεις χωροθέτησης
description: This dissertation attempts a theoretical approach in deontology, land-planning, the importance of human-geographical characteristics(anthropogeography), study of school building educational issues as the above mentioned and the basic indicators of educational system's efficiency. Five typical reference levels are analyzed representing the scales studied(world wide situation, country as well as educational institutes). The approaches empoyed characterize their differences in capability of each case. The kind the necessary data and method of organizing in order to facilitate easy and efficient use, was paid extra effort to be realized. Ways of recording and corresponding software necessary for automatically processing data are proposed. Furthermore, the GIS results are utilized in drawing conclusions, in examing the recomended criteria in proposing ways of examing the proper place for school location
Modeling Equilibrium Clusters in Lysozyme Solutions
Creators: name: Cardinaux, Frédéric
name: Stradner, Anna
name: Schurtenberger, Peter
name: Sciortino, Francesco
name: Zaccarelli, Emanuela
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present a combined experimental and numerical study of the equilibrium cluster formation in globular protein solutions under no-added salt conditions. We show that a cluster phase emerges as a result of a competition between a long-range screened Coulomb repulsion and a short-range attraction. A simple effective potential, in which only depth and width of the attractive part of the potential are optimized, accounts in a remarkable way for the wavevector dependence of the X-ray scattering structure factor.
description: 4 pages, 4 figures
The Road to a Successful HRI: AI, Trust and ethicS-TRAITS
Creators: name: Andriella, Antonio
name: Rossi, Alessandra
name: Rossi, Silvia
name: van Maris, Anouk
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The aim of this workshop is to give researchers from academia and industry the possibility to discuss the inter-and multi-disciplinary nature of the relationships between people and robots towards effective and long-lasting collaborations. This workshop will provide a forum for the HRI and robotics communities to explore successful human-robot interaction (HRI) to analyse the different aspects of HRI that impact its success. Particular focus are the AI algorithms required to implement autonomous interactions, and the factors that enhance, undermine, or recover humans' trust in robots. Finally, potential ethical and legal concerns, and how they can be addressed will be considered. Website: https://sites.google.com/view/traits-hri
description: TRAITS Workshop Proceedings including 9 articles
Syntactic elicitation (various)
Creators: name: UCL
name: Baclawski, Kenneth
name: Sikhara (Đàng Thanh Quốc Thuận)
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: cjm

description: Contrastive topic, copulas, imperatives, polar questions, serial verb constructions
Abundances of neutron-capture elements in thin- and thick-disc stars in the solar neighbourhood
Creators: name: Tautvaišienė, Gražina
name: Vázquez, Carlos Viscasillas
name: Mikolaitis, Šarūnas
name: Stonkutė, Edita
name: Minkevičiūtė, Renata
name: Drazdauskas, Arnas
name: Bagdonas, Vilius
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 aim of this work is to determine abundances of neutron-capture elements for thin- and thick-disc F, G, and K stars in several sky fields near the north ecliptic pole and to compare the results with the Galactic chemical evolution models, to explore elemental gradients according to stellar ages, mean galactocentric distances, and maximum heights above the Galactic plane. The observational data were obtained with the 1.65m telescope at the Moletai Astronomical Observatory and a fibre-fed high-resolution spectrograph. Elemental abundances were determined using a differential spectrum synthesis with the MARCS stellar model atmospheres and accounting for the hyperfine-structure effects. We determined abundances of Sr, Y, Zr, Ba, La, Ce, Pr, Nd, Sm, and Eu for 424 thin- and 82 thick-disc stars. The sample of thick-disc stars shows a clearly visible decrease in [Eu/Mg] with increasing [Fe/H] compared to the thin-disc stars, bringing more evidence of a different chemical evolution in these two Galactic components. Abundance correlation with age slopes for the investigated thin-disc stars are slightly negative for the majority of s-process dominated elements, while r-process dominated elements have positive correlations. Our sample of thin-disc stars with ages spanning from 0.1 to 9 Gyrs give the [Y/Mg]=0.022 ($\pm$0.015)-0.027 ($\pm$0.003)*age [Gyr] relation. For the thick-disc stars, when we also took data from other studies into account, we found that [Y/Mg] cannot serve as an age indicator. The radial [El/Fe] gradients in the thin disc are negligible for the s-process dominated elements and become positive for the r-process dominated elements. The vertical gradients are negative for the light s-process dominated elements and become positive for the r-process dominated elements. In the thick disc, the radial [El/Fe] slopes are negligible, and the vertical slopes are predominantly negative.
description: 20 pages, 18 figures, accepted for publication in Astronomy & Astrophysics; clarified citation from one of the references
The FIR-Radio Relationship at High and Low Redshift
Creators: name: Vlahakis, Catherine
name: Eales, Stephen
name: Dunne, Loretta
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use the results of the SCUBA Local Universe Galaxy Survey, a submillimetre survey of galaxies in the nearby Universe, to investigate the relationship between the far-infrared--submillimetre and radio emission of galaxies at both low and high redshift. At low redshift we show that the correlation between radio and far-infrared emission is much stronger than the correlation between radio and submillimetre emission, which is evidence that massive stars are the source of both the far-infrared and radio emission. At high redshift we show that the submillimetre sources detected by SCUBA are brighter sources of radio emission than are predicted from the properties of galaxies in the local Universe. We discuss possible reasons for the cosmic evolution of the relationship between radio and far-infrared emission.
description: 8 pages including 4 figures. Version accepted for publication in MNRAS
Απομάκρυνση αρσενικού από υπόγεια νερά με συδυασμό διεργασιών
Creators: name: Κατσογιάννης, Ιωάννης Α.
Publisher: name: Aristotle University of Thessaloniki
Year: 2002

description: Η ρύπανση των υπογείων νερών με αρσενικό αποτελεί παγκόσμιο πρόβλημα. Οι μέθοδοι που εφαρμόζονται δεν είναι ιδιαίτερα αποτελεσματικές για την απομάκρυνση του αρσενικού και κυρίως για την απομάκρυνση του τρισθενούς αρσενικού. Για το λόγο αυτό στην παρούσα διατριβή αναπτύχθηκε η τεχνική της βιολογικής οξείδωσης και προσρύφησης του αρσενικού σε βιολογικής παραγόμενοι οξείδια σιδήρου και μαγγανίου με σκοπό την συνολική απομάκρυνση του αρσενικού σιδήρου και μαγγανίου από τα υπόγεια νερά
description: The problem of arsenic contamination is a worldwide problem. The treatment methods, which are applied are not efficient enough for the removal of arsenic and mainly of trivalent arsenic. Therefore, in the present Ph.D. thesis, the removal of arsenic was examined during the biological oxination of iron and manganeze, intending in the development of a treatment method, which will remove simultaneously arsenic, iron and manganeze from groundwaters
Investment dynamics in Japan
Creators: name: Meehan, Luke James
Publisher: name: The Australian National University
Year: 2017
Subjects: Japan
investment
dynamics
currency
uncertainty
modelling
time-varying
forecasting
Lost Decade
aggregate
macroeconomics
trade
structural
growth

description: This thesis contributes to the literature by providing evidence that the drivers and impacts of Japanese private fixed investment change over time. There is substantial research into aggregate investment, and it remains an active area of investigation. This is particularly the case in Japan, where policy makers and macro-economists alike are encountering novel challenges in the aftermath of the ’Lost Decade’. This is partly because theoretical and empirical aspects of investment are both individually complex and jointly difficult to reconcile. This thesis considers the suggestion such intractability may be due to different models for private fixed investment applying at different points in time. Chapter 2 evaluates this suggestion in Japan by comparing optimal forecasting models produced by Dynamic Model Averaging. From 1965 to 2014, the optimal forecasting model for investment exhibits substantial composition variation. This variation appears to be linked with known Japanese business cycle and financial crisis events. Chapter 3 explores the Chapter 2 finding that the forecasting utility of uncertainty displays little time variation. This appears true even across the ‘1980s bubble’ and its collapse as well as the Asian and Global Financial Crises. The chapter discusses the potential for ‘real options’ theory to explain the apparently linear relationship between uncertainty and investment. Using Time-Varying Parameter VAR modelling, this chapter compares realised investment responses to various uncertainty shocks with the canonical response shapes from real options theory. Results differ depending on measure, but domestic, forward-looking shocks appear consistent with the real options theory. Chapter 4 explores the Chapter 2 indication of substantial time-variation in the forecasting utility of investment factors, focusing on one particular component with substantial policy relevance, the yen. Time-Varying Parameter VAR estimates demonstrate a priori unanticipated responses of both the real exchange rate and output to investment shocks. To explain this variation, Chapter 4 derives anticipated sectoral sensitivities from an optimising framework and re-considers the decomposed shock components in a simple non-linear regression format. Results indicate a structural change in the industrial composition of output growth in Japan. These three empirical analyses are consistent in demonstrating the existence of time-variation in models of Japanese private fixed investment. To re-phrase, this thesis presents evidence that the underlying, data-generating processes behind Japanese private fixed investment changes over time.
Optimization of machining parameters in milling
Creators: name: Singh, Kulbir
Publisher: name: University of British Columbia
Year: 2008

description: The cost of machining for milling is dependent on machining parameters such as spindle speed and feed per tooth. The competitiveness of manufacturing industries can be increased by optimization of machining parameters. A scientific method for the optimization of machining parameters for workpieces of continously varying radial widths is proposed in this thesis. The necessary mathematics for the proposed procedure is derived for both single pass and multi-pass milling operations. The computational results obtained on the basis of derived mathematical formulation are analysed and discussed. The cutting direction has a considerable influence on the cost of machining. Therefore, an algorithm to determine the influence of cutting direction on machining cost is also suggested. The best cutting directions for a number of workpieces of known geometry are ascertained on the basis of computational results.
Mid-infrared photodetector based on 2D material metamaterial with negative index properties for a wide range of angles near vertical illumination
Creators: name: Devine, E. Ponizovskaya
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We present the vertically illuminated Si compatible mid-infrared photodetectors based on graphene that forms negative-index metamaterial. The coupling into a 2D layer at the angles near normal to the surface is negligible without the help of a metamaterial. We propose a low loss metamaterial, the dielectric structure with the nano/microholes through 2D materials that supports a resonance and enhances quantum efficiency in a wide range of incident angles.
description: 8 pages, 4 figures
Δομή των συνερεύσεων του σκληρού υποστρώματος της κατώτερης υποπαραλιακής ζώνης στο Βόρειο Αιγαίο
Creators: name: Αντωνιάδου, Χρυσάνθη
Publisher: name: Aristotle University of Thessaloniki
Year: 2003
Subjects: Σκληρό υπόστρωμα
Υποπαραλιακή ζώνη
Βιοικοινωνία σκιόφιλων φυκών
Hard substrate
Infralittoral zone
Biocenosis of sciaphilic algae

description: Ο στόχος της διατριβής είναι η διερεύνηση των βενθικών βιοκοινωνιών του σκληρού υποστρώματος της κατώτερης υποπαραλιακής ζώνης, στο χώρο και στο χρόνο, καθώς και των διεργασιών του εποικισμού και της διαδοχής τους, σε σχέση με την εποχή έναρξης του εποικισμού και το υλικό της εποίκισης. Πραγματοποιήθηκαν δειγματοληψίες με αυτόνομη κατάδυση και τη χρήση πλαισίου 400 cm2, σε εφτά σταθμούς δειγματοληψίας, ενώ στον επιλεγμένο σταθμό αναφοράς ποντίστηκαν πλακίδια 30Χ30 cm, από τσιμέντο και κεραμίδι για τη μελέτη της διαδοχής. Η στατιστική επεξεργασία των δεδομένων περιλαμβάνει μονομεταβλητές, πολυμεταβλητές και αναλύσεις γραφικής κατανομής. Σε ότι αφορά το μεγαβένθος καταγράφηκε μια βιοκοινωνία με την επιμέρους επικράτηση 3 φάσεων σε σχέση με την κλίση του υποστρώματος, ενώ εποχικά διαφοροποιήθηκε το καλοκαίρι. Ως προς το μακροβένθος εντοπίστηκε η βιοκοινωνία φυκών, μέσω 4 διαφορετικών φάσεων σε σχέση με αβιοτικούς και βιοτικούς παράγοντες, η οποία δεν φάνηκε να υπόκειται σε έντονες εποχικές μεταβολές. Τέλος, σε ότι αφορά τη διαδοχή, οι διαφοροποιήσεις, φάνηκε να σχετίζονται με τα φυσικοχημικά χαρακτηριστικά της περιοχής, τη δομή των γειτονικών βιοκοινωνιών, την εποχή πόντισης των υποστρωμάτων και τη διάρκεια πόντισης τους, ενώ το υλικό δεν είχε σημαντική επίδραση
description: The object of this study is the structure of hard substrate benthic assemblages of the lower infralittoral zone, spatially and seasonaly. The procedures of colonization were also studied in the reference site. Sampling was made SCUBA-diving at 7 sites in the N. Aegean Sea, while at the reference site cement and ceramic plates were immersed in order to study the colonization process. Statistical analysis includes univariate, multivariate and graphical distributional analysis. The quantitative analysis of megabenthos revealed one common biocenosis, while 3 separate facies were recorded in dependance to substrate's inclination. Furthermore summer samples discriminutes. As regards macrobenthos the biocenosis of sciaphilic algae was constantly present at all sites, including 4 facies in relation to abiotic and biotic factors. This biocenosis appeared unaffected by seasonal changes. The procedures of colonization were mostly related to the physico-chemical parameters of area, the structure of the nearby biocenosis, the seasonal deployment and the stay of the artificial substrate in the area, while the qualitative composition of the substrate played a minor role
Hybrid graph convolutional neural networks for landmark-based anatomical segmentation
Creators: name: Gaggion, Nicolás
name: Mansilla, Lucas
name: Milone, Diego
name: Ferrante, Enzo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In this work we address the problem of landmark-based segmentation for anatomical structures. We propose HybridGNet, an encoder-decoder neural architecture which combines standard convolutions for image feature encoding, with graph convolutional neural networks to decode plausible representations of anatomical structures. We benchmark the proposed architecture considering other standard landmark and pixel-based models for anatomical segmentation in chest x-ray images, and found that HybridGNet is more robust to image occlusions. We also show that it can be used to construct landmark-based segmentations from pixel level annotations. Our experimental results suggest that HybridGNet produces accurate and anatomically plausible landmark-based segmentations, by naturally incorporating shape constraints within the decoding process via spectral convolutions.
description: Accepted for publication at MICCAI 2021
Alien Son : The life and times of Cheok Hong Cheong, (Zhang Zhuoxiong) 1851-1928
Creators: name: Welch, Ian Hamilton
Publisher: name: The Australian National University
Year: 2003
Subjects: Chinese identity
Cheok Hong Cheong
Australian attitudes
White Australia Policy
discriminatory immigration policy
Chinese-Australian Christians
Alien Son
Christian Church
19th Century
Australian Chinese Community

description: This thesis contributes to the ongoing discussion of modern Chinese identity by providing a case study of Cheok Hong CHEONG. This thesis contributes to the ongoing discussion of modern Chinese identity by pro-viding a case study of Cheok Hong CHEONG. It necessarily considers Australian atti-tudes towards the Chinese during the 19th century, not least the White Australia Pol-icy. The emergence of that discriminatory immigration policy over the second half of the 19th century until its national implementation in 1901 provides the background to the thesis. Cheong was the leading figure among Chinese-Australian Christians and a prominent figure in the Australian Chinese community and the thesis seeks to iden-tify a man whose contribution has largely been shadowy in other studies or, more commonly, overlooked by the parochialism of colony/state emphasis in many histo-ries of Australia. His role in the Christian church fills a space in Victorian religious history. ¶ ...
Συμβολή στην προσομοίωση της ισχυρής σεισμικής κίνησης, με έμφαση στο κοντινό πεδίο, στην ευρύτερη περιοχή του Αιγαίου
Creators: name: Ρουμελιώτη, Ζαφειρία,
Publisher: name: Aristotle University of Thessaloniki
Year: 2003
Subjects: Κατανομή ολίσθησης
Ισχυρή σεισμική κίνηση
Στοχαστική μέθοδος
Slip distribution
Strong ground motion
Stochastic method

description: Στόχος της διατριβής είναι να συμβάλλει στην προσπάθεια κατανόησης, εφαρμογής και αξιολόγησης μοντέρνων μεθοδολογιών που έχουν προταθεί για τον υπολογισμό σεισμών σχεδιασμού, δίνοντας έμφαση στην εφαρμοσιμότητά τους σε περιοχές κοντά σε μεγάλα σεισμικά ρήγματα. Στα πλαίσια της μελέτης αυτής εφαρμόστηκε η μέθοδος αντιστροφής των χρονικών συναρτήσεων της σεισμικής πηγής προκειμένου να προσδιοριστούν με ακρίβεια τα χωρο-χρονικά χαρακτηριστικά της διάρρηξης και ο τρόπος κατανομής της ολίσθησης από δυο πρόσφατους μεγάλους σεισμούς του ελληνικού χώρου(7ης Σεπτεμβρίου 1999 στην Αθήνα και 26ης Ιουλίου 2001 στη Σκύρο). Το μοντέλο κατανομής του ολίσθησης του σεισμού της Αθήνας χρησιμοποιήθηκε στη συνέχεια για την προσομοίωση του στατικού πεδίου μετάθεσης στην ευρύτερη επικεντρική περιοχή και τη στοχαστική προσομοίωση της ισχυρής σεισμικής κίνησης σε θέσεις όπου καταγράφηκε ο σεισμός, αλλά και εντός της πλειόσειστης περιοχής όπου δεν υπάρχουν ενόργανες πληροφορίες. Από το σύνολο των αποτελεσμάτων τεκμαίρεται ότι κατά τη διάρκεια του σεισμού της Αθήνας εκδηλώθηκαν φαινόμενα κατευθυντικότητας της διάρρηξης προς την πλειόσειστη περιοχή τα οποία προκάλεσαν αύξηση του συχνοτικού περιεχομένου της ισχυρής σεισμικής κίνησης σε περιόδους 0.2-0.3sec και >2sec. Η αύξηση αυτή, σε συνδυασμό με την επίδραση των τοπικών εδαφικών συνθηκών, συνέβαλλε καθοριστικά στον τρόπο κατανομής των βλαβών που προκάλεσε ο σεισμός
description: The aim of this study is to contribute to the effort of understanding and evaluating modern that are widely applied to simulate strong ground motion, by giving emphasis on their ability to reproduce observed motions in the proximity of large faults. Detailed spatial and temporal characteristics of two recent Greek earthquakes(7 September 1999 Athens earthquake and 26 July 2001 Skyros earthquake), including the exact distribution of slip on the corresponding fault planes, are sought through combining the source time function inversion and the empirical Green's function methods. The resulting slip distribution model of the Athens earthquakes is further used to deterministically simulate the displacement field observed at the surface around the seismogenic fault and to stochastically simulate strong ground motion at recording sites, as well as within the meizoseismal area where no records are available. Results imply the emergence of strong rupture directivity effects towards the meizoseismal area, which inreased strong ground motion in the period 0.2-0.3sec and periods>2sec. This increase, combined with significant site effects, contributed significantly to the distribution of damage during the examined earthquake
Ab initio four-body calculation of n-3He, p-3H, and d-d scattering
Creators: name: Deltuva, A.
name: Fonseca, A. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Four-body equations in momentum space are solved for neutron-$\He$, proton-$\Hh$, and deuteron-deuteron scattering; all three reactions are coupled. The Coulomb interaction between the protons is included using the screening and renormalization approach as it was recently done for proton-deuteron and proton-$\He$ scattering. Realistic interactions are used between nucleon pairs. For the first time fully converged results for the observables pertaining to the six different elastic and transfer reactions are obtained and compared with experimental data.
description: submitted to Phys. Rev. Lett
Γενετική σύσταση πληθυσμών της αστακοκαραβίδας Homarus gammarus(L.) της Ελλάδας
Creators: name: Κατσαρές, Βασίλειος Δ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2003
Subjects: Ευρωπαϊκή αστακοκαραβίδα
Αμερικάνικη αστακοκαραβίδα
Εκκινητές μιτοχονδριακού DNA
European lobster
MTDNA primers

description: Εξετάστηκε η γενετική και μορφομετρική ποικιλομορφία ανάμεσα σε επτά πληθυσμούς του Η. gammarus από την Ελλάδα. Αναλύθηκαν γενετικά και δυο πληθυσμοί από την υπόλοιπη Μεσόγειο. Εξετάστηκε γενετικά τόσο το μιτοχονδριακό, όσο και το πυρηνικό γονιδίωμα, ενώ αναλύθηκαν τόσο ποσοτικά, όσο και ποιοτικά μορφομετρικά χαρακτηριστικά. Αναπτύχθηκαν εκκινητές για την ενίσχυση με την PCR ολόκληρου του mtDNA του H. gammarus και του H. americanus σε τέσσερα τμήματα και του H. gammarus σε ένα ενιαίο τμήμα. Βρέθηκε η πρωτοδιάταξη 2110bp του mtDNA του H. gammarus. Παρατηρήθηκε ετεροπλασμία στο H. gammarus, η οποία οφείλεται στην ύπαρξη δυο τουλάχιστον τύπων mtDNA σε κάθε άτομο. Το H. americanus μπορεί να διακριθεί από το H. gammarus με τη χρήση 36 ενδονουκλεασών περιορισμού. Για την πληθυσμιακή ανάλυση του H. gammarus χρησιμοποιήθηκαν δυο τμήματα μήκους 3.000bp και 2.000bp του mtDNA. Σαφής ήταν η γενετική διαφοροποίηση των πληθυσμών του Αιγαίου και του Ιονίου, ίσως λόγω ιδιαίτερων υδρογεωλογικών χαρακτηριστικών στα δυο πελάγη. Τα αρσενικά άτομα στατιστικά περισσότερα από τα θηλυκά. Στα αρσενικά το ψαλίδι παρατηρείται στατιστικά δεξιά. Οι πληθυσμοί του Αιγαίου πρέπει να προφυλαχθούν από εισαγωγές. Απαραίτητη είναι και η προστασία των πληθυσμών του Ιονίου, εξαιτίας των πολύ μειωμένων πληθυσμιακών μεγεθών
description: The genetic structure and morphometric variations among seven H. gammarus popylations from Greece have been evaluated. Furthermore, two popylations from the rest of the Mediterranean Sea have been genetically analysed. Genetic analyses comprised both the mitochondrial and the nuclear genome, while themorphometric analyses comprised both qualitative and quantitative characters. New primers have been designed, which enable the PCR amplification of the whole mtDNA of both H. gammarus and H. americans in four segments, and moreover the one-step amplification of the complete mtDNA of H. gammarus. Furthermore, 2110bp of the mtDNA of H. gammarus have been sequenced. The RFLP analysis revealed heteroplasmy in H. gammarus, due to the existence of two, at least, different mtDNAs in each individual H. americanus can be distinquished from H. gammarus using 36 restriction enzumes. For the purpose of H. gammarus population analysis, two mtDNA segments of 3000bp and 2000bp have been used. Clear genetic differentiation has been found between the Aegean and the Ionian populations, probably due to special hydrogeologic characteristics in the two seas. The sex ratio was found statistically biased to males. Male individuales have been statistically the scissors to the right. The Aegean populations should be protected from introductions. The Ionian population should be protected due to its reduced population size
CFD VARIATIONAL TWO FLUID MODEL IMPLEMENTATION AND VERIFICATION
Creators: name: Ram, Raghav
Publisher: name: Purdue University Graduate School
Year: 2025
Subjects: classificationCode: 401906
subject: Nuclear engineering (incl. fuel enrichment and waste processing and storage)
classificationCode: 401299
subject: Fluid mechanics and thermal engineering not elsewhere classified
classificationCode: 401204
subject: Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics)
classificationCode: 401211
subject: Multiphysics flows (incl. multiphase and reacting flows)

description: The foundation of numerical codes used in engineering analyses of two-phase flows is the two-fluid model (TFM). However, the TFM codes use artificial regularization to remove the high frequency ill-posed instability in the numerical solution. This work demonstrates that incorporating variational inertial coupling terms to the numerical two-fluid model code, makes it more complete, objective and well-posed without the need for any regularization. The variational TFM is implemented in an industrial CFD code and the two-fluid Burgers problem is used to verify the numerical TFM against analytic solutions.
Probing the Band Structure of LaTe_2 Using Angle Resolved Photoemission Spectroscopy
Creators: name: Garcia, D. R.
name: Zhou, S. Y.
name: Gweon, G. -H.
name: Jung, M. H.
name: Kwon, Y. S.
name: Lanzara, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: With the current interest in the rare-earth tellurides as high temperature charge density wave materials, a greater understanding of the physics of these systems is needed, particularly in the case of the ditellurides. We report a detailed study of the band structure of LaTe_2 in the charge density wave state using high-resolution angle resolved photoemission spectroscopy (ARPES). From this work we hope to provide insights into the successes and weaknesses of past theoretical study as well as helping to clear up prior ambiguities by providing an experimental basis for future work in the tellurides.
description: 6 pages, 7 figures, Proceedings of the ICESS 10(August 2006), Journal of Electron Spectroscopy and Related Phenomena - Published May 2007
On the Multiple Deaths of Whitehead's Theory of Gravity
Creators: name: Gibbons, Gary
name: Will, Clifford M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: Whitehead's 1922 theory of gravitation continues to attract the attention of philosophers, despite evidence presented in 1971 that it violates experiment. We demonstrate that the theory strongly fails five quite different experimental tests, and conclude that, notwithstanding its meritorious philosophical underpinnings, Whitehead's theory is truly dead.
description: 22 pages; to be submitted to Studies In History And Philosophy Of Modern Physics
The strange partner of the $Z_{c}$ structures in a coupled-channels model
Creators: name: Ortega, Pablo G.
name: Entem, David R.
name: Fernandez, F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The discovery of a new charged structure in the $K^+$ recoil-mass spectrum near the $D^-_s D^{*0}/D^{*-}_sD^0$ threshold, dubbed $Z_{cs}(3985)^-$, reinforce the idea that the structure of hadrons goes beyond the naive $qqq$ and the $q\bar q$ structures. The existence of this state, with quark content $c\bar c s\bar u$, can be expected from the well-established $Z_c(3900)^\pm$ and $Z_c(4020)$ states using SU(3) flavor symmetry. The $Z_c$ structures have been explained using the chiral constituent quark model in a coupled-channels calculation and, in this work, we undertake the study of the $Z_{cs}(3985)^-$ using the same model. We are able to reproduce the $K^+$ recoil-mass spectrum without any fine tuning of the model parameters. The study of the analytical structure of the S-matrix allows us to conclude that the structure is due to the presence of one virtual pole. A second state, the SU(3) flavor partner of the $Z_c(4020)$ is predicted at $\sim\!\! 4110$ MeV/$c^2$. New states in the hidden bottom strange sector are also predicted.
description: 7 pages, 5 figures, 1 table. arXiv admin note: text overlap with arXiv:1808.00914
Distribution Function of Dark Matter with Constant Anisotropy
Creators: name: Ma, Ding
name: He, Ping
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: N-body simulations of dark matter halos show that the density is cusped near the center of the halo. The density profile behaves as $r^{-γ}$ in the inner parts, where $γ\simeq 1$ for the NFW model and $γ\simeq 1.5$ for the Moore's model, but in the outer parts, both models agree with each other in the asymptotic behavior of the density profile. The simulations also show the information about anisotropy parameter $β(r)$ of velocity distribution. $β\approx 0$ in the inner part and $β\approx 0.5$ (radially anisotropic) in the outer part of the halo. We provide some distribution functions $F(E,L)$ with the constant anisotropy parameter $β$ for the two spherical models of dark matter halos: a new generalized NFW model and a generalized Moore model. There are two parameters $α$ and $ε$ for those two generalized models to determine the asymptotic behavior of the density profile. In this paper, we concentrate on the situation of $β(r)=1/2$ from the viewpoint of the simulation.
description: 11 pages, accepted for publication in Int. J. Mod. Phys. D, add a quotation
SiO in C-rich circumstellar envelopes of AGB stars: effects of non-LTE chemistry and grain adsorption
Creators: name: Schoeier, F. L.
name: Olofsson, H.
name: Lundgren, A. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: New SiO multi-transition millimetre line observations of a sample of carbon stars, including J=8-7 observations with the APEX telescope, are used to probe the role of non-equilibrium chemistry and the influence of grains in circumstellar envelopes of carbon stars. A detailed radiative transfer modelling, including the effect of dust emission in the excitation analysis, of the observed SiO line emission is performed. A combination of low- and high-energy lines are important in constraining the abundance distribution. It is found that the fractional abundance of SiO in these C-rich environments can be several orders of magnitude higher than predicted by equilibrium stellar atmosphere chemistry. In fact, the SiO abundance distribution of carbon stars closely mimic that of M-type (O-rich) AGB stars. A possible explanation for this behaviour is a shock-induced chemistry, but also the influence of dust grains, both as a source for depletion as well as production of SiO, needs to be further investigated. As observed for M-type AGB stars, a clear trend that the SiO fractional abundance decreases as the mass-loss rate of the star increases is found for the carbon stars. This indicates that SiO is accreted onto dust grains in the circumstellar envelopes.
description: Accepted for publication in A&A, 11 pages, 7 figures
Preschool Peer-Mediated AAC Intervention (Thiemann-Bourque et al., 2016)
Creators: name: Thiemann-Bourque, Kathy
name: Brady, Nancy
name: McGuff, Sara
name: Stump, Keenan
name: Naylor, Amy
Publisher: name: ASHA journals
Year: 2022
Subjects: Communication studies

description: Purpose: This study was conducted to investigate the effectiveness of a social intervention that integrates peer-mediated approaches and the Picture Exchange Communication System (PECS). Method: Effects were evaluated using a series of A-B designs replicated across 4 children with severe autism and limited verbal skills. Seven peers without disabilities were trained to use PECS and facilitative social skills. Measures of changes included rates of communication behaviors, modes, functions, and engagement. Results: Outcomes revealed an intervention effect for 1 child with autism, and this effect was replicated across 3 other children. All children improved in peer-directed communication, with greater increases for 2 children during snack time. For each child with autism, the primary communication behavior was to initiate with picture symbols to request; the peer’s primary communication was to respond. Two children increased communicative functions to comment and to share, and all 4 children showed improved social engagement. All peers increased their communication with the children with autism. Conclusions: These findings add to the limited research on the benefits of teaching typically developing peers to be responsive listeners to preschoolers with autism by learning to use PECS. These results invite further investigation of teaching peers other augmentative and alternative communication approaches and how to increase children’s communication with peers for different purposes.
Virtual Nature: A practice-led enquiry into the relationship between painting and vernacular photography through the process of the painted monotype
Creators: name: Bullen, Leah Louise
Publisher: name: The Australian National University
Year: 2018
Subjects: Painting
contemporary painting
contemporary visual culture
monotype
watercolour
watercolor
gouache
vernacular photography
snapshot photography
painting and photography
visual perception
embodied vision
19th Century photography
19th Century visual culture
transhistoricity
virtuality
figure and ground relationships
false attachments
collage

description: My practice-led research explores the relationship between painting and vernacular photography through the process of painted monotypes. This project has developed from an ongoing fascination with the visual qualities of photography and what happens when you translate photographs into other material forms, such as painting. The aim of this project is to develop images that interrogate how painted monotypes provide a distinctive interpretation of embodied experience through their visual, material and sensory qualities. Today, like no other time in history, photography is embedded in our daily lives through hand-held devices and the interface of the digital screen. My research examines how this embedded experience of the photographic relates to the processes and visual qualities of the painted monotype. The project is focused on three primary locations as subject matter: the aquarium, the botanical glasshouse and the habitat diorama. Through my research I explore how these sites function in optically and conceptually similar ways to the world of images, through shared notions of virtuality and indexicality. This research is informed by the work of Édouard Vuillard, Mamma Andersson, Peter Doig, David Hockney and the landscapes of Gustav Klimt. These painters interrogate the territory between painting and lens-based images in very specific ways, relating to visual perception, embodied vision, figure and ground relationships, and visual textures. In a theoretical context, my examination of the relationship between painting and photography has been motivated by the writings of Elizabeth Wynne Easton, Aaron Scharf, John Berger and Russell Ferguson; while Anne Friedberg, Rob Shields, Nicholas Mirzoeff, Geoffrey Batchen, Kris Paulsen and Johanna Love have been instrumental in determining a connection to the virtual and the index in my research.
Periodic Gravitational Waves From Small Cosmic String Loops
Creators: name: Dubath, Florian
name: Rocha, Jorge V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider a population of small, high-velocity cosmic string loops. We assume the typical length of these loops is determined by the gravitational radiation scale and use the results of \cite{Polchinski:2007rg} which pointed out their highly relativistic nature. A study of the gravitational wave emission from such a population is carried out. The large Lorentz boost involved causes the lowest harmonics of the loops to fall within the frequency band of the LIGO detector. Due to this feature the gravitational waves emitted by such loops can be detected in a periodic search rather than in burst or stochastic analysis. It is shown that, for interesting values of the string tension ($10^{-10}\lsim Gμ\lsim 10^{-8}$) the detector can observe loops at reasonably high redshifts and that detection is, in principle, possible. We compute the number of expected observations produced by such a process. For a 10 hour search we find that this number is of order $O(10^{-4})$. This is a consequence of the low effective number density of the loops traveling along the line of sight. However, small probabilities of reconnection and longer observation times can improve the result.
description: 1+15 pages, 7 figures
Observation of Microwave Shielding of Ultracold Molecules
Creators: name: Anderegg, Loïc
name: Burchesky, Sean
name: Bao, Yicheng
name: Yu, Scarlett S.
name: Karman, Tijs
name: Chae, Eunmi
name: Ni, Kang-Kuen
name: Ketterle, Wolfgang
name: Doyle, John M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Harnessing the potential wide-ranging quantum science applications of molecules will require control of their interactions. Here, we use microwave radiation to directly engineer and tune the interaction potentials between ultracold calcium monofluoride (CaF) molecules. By merging two optical tweezers, each containing a single molecule, we probe collisions in three dimensions. The correct combination of microwave frequency and power creates an effective repulsive shield, which suppresses the inelastic loss rate by a factor of six, in agreement with theoretical calculations. The demonstrated microwave shielding shows a general route to the creation of long-lived, dense samples of ultracold molecules and evaporative cooling.
Existence of birational small Cohen-Macaulay modules over biquadratic extensions in mixed characteristic
Creators: name: Sridhar, Prashanth
Publisher: name: arXiv
Year: 2021
Subjects: subject: Commutative Algebra (math.AC)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 13C14 (Primary) 13B22, 13C10, 13C15, 13D22, 13H05

description: Let $S$ be an unramified regular local ring of mixed characteristic two and $R$ the integral closure of $S$ in a biquadratic extension of its quotient field obtained by adjoining roots of sufficiently general square free elements $f,g\in S$. Let $S^2$ denote the subring of $S$ obtained by lifting to $S$ the image of the Frobenius map on $S/2S$. When at least one of $f,g\in S^2$, we characterize the Cohen-Macaulayness of $R$ and show that $R$ admits a birational small Cohen-Macaulay module. It is noted that $R$ is not automatically Cohen-Macaulay in case $f,g\in S^2$ or if $f,g\notin S^2$.
description: Final version, to appear in Journal of Algebra; minor changes, unabbreviated title, updated references
Self-cooling of a micro-mirror by radiation pressure
Creators: name: Gigan, S.
name: Boehm, H. R.
name: Paternostro, M.
name: Blaser, F.
name: Langer, G.
name: Hertzberg, J. B.
name: Schwab, K.
name: Baeuerle, D.
name: Aspelmeyer, M.
name: Zeilinger, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We demonstrate passive feedback cooling of a mechanical resonator based on radiation pressure forces and assisted by photothermal forces in a high-finesse optical cavity. The resonator is a free-standing high-reflectance micro-mirror (of mass m=400ng and mechanical quality factor Q=10^4) that is used as back-mirror in a detuned Fabry-Perot cavity of optical finesse F=500. We observe an increased damping in the dynamics of the mechanical oscillator by a factor of 30 and a corresponding cooling of the oscillator modes below 10 K starting from room temperature. This effect is an important ingredient for recently proposed schemes to prepare quantum entanglement of macroscopic mechanical oscillators.
description: 11 pages, 9 figures, minor corrections