cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Figure of Merit for Dark Energy Constraints from Current Observational Data
Creators: name: Wang, Yun
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Choosing the appropriate figure of merit (FoM) for dark energy (DE) constraints is key in comparing different DE experiments. Here we show that for a set of DE parameters {f_i}, it is most intuitive to define FoM = 1/\sqrt{Cov(f1,f2,f3,...)}, where Cov(f1,f2,f3,...) is the covariance matrix of {f_i}. The {f_i} should be minimally correlated. We demonstrate two useful choices of {f_i} using 182 SNe Ia (compiled by Riess et al. 2007), [R(z_*), l_a(z_*), Ω_b h^2] from the five year Wilkinson Microwave Anisotropy Probe (WMAP) observations, and SDSS measurement of the baryon acoustic oscillation (BAO) scale, assuming the HST prior of H_0=72+/-8 km/s Mpc^{-1} and without assuming spatial flatness. We find that the correlation of (w_0,w_{0.5}) [w_0=w_X(z=0), w_{0.5}=w_X(z=0.5), w_X(a) = 3w_{0.5}-2w_0+3(w_0-w_{0.5})a] is significantly smaller than that of (w_0,w_a) [w_X(a)=w_0+(1-a)w_a]. In order to obtain model-independent constraints on DE, we parametrize the DE density function X(z)=ρ_X(z)/ρ_X(0) as a free function with X_{0.5}, X_{1.0}, and X_{1.5} [values of X(z) at z=0.5, 1.0, and 1.5] as free parameters estimated from data. If one assumes a linear DE equation of state, current data are consistent with a cosmological constant at 68% C.L. If one assumes X(z) to be a free function parametrized by (X_{0.5}, X_{1.0}, X_{1.5}), current data deviate from a cosmological constant at z=1 at 68% C.L., but are consistent with a cosmological constant at 95% C.L.. Future DE experiments will allow us to dramatically increase the FoM of constraints on (w_0,w_{0.5}) and of (X_{0.5}, X_{1.0}, X_{1.5}). This will significantly shrink the DE parameter space to enable the discovery of DE evolution, or the conclusive evidence for a cosmological constant.
description: 7 pages, 3 color figures. Submitted
Τεχνικές αφήγησης λαϊκών παραμυθιών και το αφηγηματικό θέατρο του Μπέρτολτ Μπρεχτ. Προφορικότητα και αποστασιοποίηση
Creators: name: Μπάρμπα, Αντιγόνη Βλαδίμηρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Καλλιτεχνικό πλήρωμα Ουμπού
Μπέρτολτ Μπρεχτ
Η τέχνη της αφήγησης
Ubu art crew
Bertolt Brecht
The art of storytelling

description: Σκοπός της διατριβής ήταν η μελέτη της τέχνης της αφήγησης μέσα στο χρόνο, από τον «παραδοσιακό παραμυθά» στο σύγχρονο κίνημα της αφήγησης. Διερευνήσαμε τις προφορικές παραδοσιακές πρακτικές που ταξίδεψαν μέσω της ιστορίας στο σήμερα. Στους καιρούς μας το κίνημα της αφήγησης εμφανίζεται σε διάφορους παραστάσιμους χώρους. Το βασικό ερώτημα είναι το κατά πόσο η φύση της αφήγησης έχει σχέση με την τέχνη της υποκριτικής. Στο δεύτερο μέρος της διατριβής εξετάζουμε τις τεχνικές που χρησιμοποίησε ο Μπέρτολτ Μπρεχτ και αυτό που ο ίδιος αποκαλούσε «αφηγηματικό θέατρο». Το τελικό ερώτημα είναι : μπορούν αυτές οι δύο τέχνες να συνδυαστούν; Η σχέση μεταξύ αφήγησης και θεάτρου είναι πράγματι στενή και δυνατή. Η απάντηση βρίσκεται στο ζωντανό παράδειγμα που παρουσιάζουμε στο τέλος της εργασίας όπου μύθος και τεχνικές του Μπρεχτ καταλήγουν σε ένα παραστάσιμο γεγονός.
description: The aim of the present thesis was the study of the art of storytelling through time, from the “traditional storyteller” to the current storytelling movement. We examined the traditional oral narrative practices that travelled through history in recent times. In recent times the storytelling movement grows in several performative areas. The basic question is the nature of storytelling and its relationship with acting. Furthermore, we analyzed Bertolt Brecht’s techniques and what he called “narrative theatre”. The final question is: can these two performative arts be combined? The relationship between storytelling and theatre is really close and strong. The answer lies on the live example we present at the end of our work, where myth and Brecht’s rehearsal techniques take place as a professional performance.
Symmetry Operators for the Fokker-Plank-Kolmogorov Equation with Nonlocal Quadratic Nonlinearity
Creators: name: Shapovalov, Alexander V.
name: Rezaev, Roman O.
name: Trifonov, Andrey Yu.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The Cauchy problem for the Fokker-Plank-Kolmogorov equation with a nonlocal nonlinear drift term is reduced to a similar problem for the correspondent linear equation. The relation between symmetry operators of the linear and nonlinear Fokker-Plank-Kolmogorov equations is considered. Illustrative examples of the one-dimensional symmetry operators are presented.
description: This is a contribution to the Vadim Kuznetsov Memorial Issue on Integrable Systems and Related Topics, published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Optical multi-band observations of BL Lacertae during the outburst of 2005
Creators: name: Hu, Shao Ming
name: Wu, J. H.
name: Zhao, G.
name: Zhou, X.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The aim of our observations is to investigate the intranight variability properties and the spectral variability of BL Lacertae. 799 optical multi-band observations were intensively made with the Beijing-Arizona-Taiwan-Connecticut (BATC) 60/90cm Schmidt telescope during the outburst composed of two subsequent flares in 2005. The second flare, whose rising phase lasted at least 44 days, was observed with amplitudes of more than 1.1 mag in three BATC optical bands. In general, on intranight timescale the amplitude of variability and the variation rate are larger at the shorter wavelength, and the variation rate is comparable in the rising and decaying phases within each band. A possible time lag between the light curves in bands e and m, around 11.6 minutes, was obtained. Based on the analysis of the colour index variation with the source brightness, the variability of BL Lacertae can be interpreted as having two components: a "strongly-chromatic" intranight component and a "mildly-chromatic" internight component, which may be the results of both intrinsic physical mechanism and geometric effects.
description: 16 pages, 4 figures
Surveying the Three-Dimensional Fixed Points of T-Duality
Creators: name: Ayón-Beato, Eloy
name: Giribet, Gaston
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We explore the family of fixed points of T-Duality transformations in three dimensions. For the simplest nontrivial self-duality conditions it is possible to show that, additionally to the spacelike isometry in which the T-Duality transformation is performed, these backgrounds must be necessarily stationary. This allows to prove that for nontrivial string coupling, the low energy bosonic string backgrounds which are additionally self-T-dual along an isometry direction generated by a constant norm Killing vector are uniquely described by a two-parametric class, including only three nonsingular cases: the charged black string, the exact gravitational wave propagating along the extremal black string, and the flat space with a linear dilaton. Besides, for constant string coupling, the only self-T-dual lower energy string background under the same assumptions corresponds to the Coussaert-Henneaux spacetime. Thus, we identify minimum criteria that yield a classification of these quoted examples and only these. All these T-dual fixed points describe exact backgrounds of string theory.
description: 11 Pages
Measurement of the Branching Fractions of the Rare Decays B0->Ds(*)+pi-, B0->Ds(*)+rho-, and B0->Ds(*)-K(*)+
Creators: name: The BABAR Collaboration
name: Aubert, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report the measurement of the branching fractions of the rare decays B0->Ds(*)+pi-, B0->Ds(*)+rho-, and B0->Ds(*)-K(*)+ in a sample of 381 million Y(4S) decays into BBbar pairs collected with the BABAR detector at the PEP-II asymmetric-energy e+e- storage ring. We present evidence for the decay B0->Ds-K*+ and the vector-vector decays B0->Ds*+rho- and B0->Ds*-K*+, as well as the first measurement of the vector meson polarization in these decays. We also determine the ratios of the CKM-suppressed to CKM-favored amplitudes r(D(*)pi) and r(D(*)rho) in decays B0->D(*)pi and B0->D(*)rho, and comment on the prospects for measuring the CP observable sin(2beta+gamma).
description: 15 pages, 9 postscript figures, submitted to Physical Review D
Improved $u'g'r'i'z'$ to $UBVR_CI_C$ Transformation Equations for Main Sequence Stars
Creators: name: Rodgers, Christopher T.
name: Canterna, Ron
name: Smith, J. Allyn
name: Pierce, Michael J.
name: Tucker, Douglas L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report improved transformation equations between the $u'g'r'i'z'$ and $UBVR_CI_C$ photometric systems. Although the details of the transformations depend on luminosity class, we find a typical rms scatter on the order of 0.001 magnitude if the sample is limited to main sequence stars. Furthermore, we find an accurate transformation requires complex, multi-color dependencies for the bluer bandpasses. Results for giant stars will be reported in a subsequent paper.
description: 7 pages, 8 figures
Self-image effects for diffraction and dispersion
Creators: name: Rosu, H. C.
name: Trevino, J. P.
name: Cabrera, H.
name: Murguia, J. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Excerpt: We apply the wavelet transform to the fractal Talbot effect in both diffraction and fiber dispersion. In the first case, the self similar character of the transverse paraxial field at irrational multiples of the Talbot distance is confirmed, whereas in the second case it is shown that the field is not self similar for supergaussian pulses. Finally, a high-precision measurement of irrational distances employing the fractal index determined with the wavelet transform is pointed out
description: 12 pp, 5 figs: the first 4 are to be found as figs. 3-6 at http://arxiv.org/abs/physics/0510067 contribution at Zacatecas miniworkshop "Math. Physics: Symmetries" (Dec/05)
Efficient measurement of linear susceptibilities in molecular simulations: Application to aging supercooled liquids
Creators: name: Berthier, Ludovic
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We propose a new method to measure time-dependent linear susceptibilities in molecular simulations, which does not require the use of nonequilibrium simulations, subtraction techniques, or fluctuation-dissipation theorems. The main idea is an exact reformulation of linearly perturbed quantities in terms of observables accessible in unperturbed trajectories. We have applied these ideas to two supercooled liquids in their nonequilibrium aging regime. We show that previous work had underestimated deviations from fluctuation-dissipation relations in the case of a Lennard-Jones system, while our results for silica are in qualitative disagreement with earlier results.
description: 4 pages, 3 figures
Η προσωρινή απασχόληση
Creators: name: Στερνιώτη, Μαρία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Προσωρινή Απασχόληση
Επιχείρηση Προσωρινής Απασχόλησης
Έμμεσος εργοδότης
Temporary employment
Temporary work agency
User undertaking

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη της προσωρινής απασχόλησης και του νομοθετικού πλαισίου που την περιβάλλει. Αρχικά, οριοθετήσαμε εννοιολογικά την προσωρινή απασχόληση και την διακρίναμε από συναφείς θεσμούς. Στη συνέχεια, εξετάσαμε τη σύμβαση παραχώρησης, η οποία συνιστά τη μία εκ των δύο συμβάσεων που συναντώνται στο τριγωνικό σχήμα της προσωρινής απασχόλησης, κάνοντας ειδικότερη αναφορά στη διάκριση της σύμβασης παραχώρησης από τη σύμβαση έργου. Ακολούθως, εξετάσαμε τη σύμβαση προσωρινής απασχόλησης και παρουσιάσαμε αναλυτικά το νομοθετικό της πλαίσιο και τα προβλήματα που ανακύπτουν ως προς ορισμένες νομοθετικές διατάξεις. Ακόμη, αναφερθήκαμε στην Ευρωπαϊκή Οδηγία 2008/104/ΕΚ η οποία τέθηκε, προκειμένου να εναρμονιστούν οι διαφορετικές νομοθεσίες των ευρωπαϊκών χωρών όσον αφορά την ρύθμιση της προσωρινής απασχόλησης. Τέλος, ασχοληθήκαμε με τη συλλογική διάσταση των δικαιωμάτων των προσωρινά απασχολουμένων, έναντι της επιχείρησης προσωρινής απασχόλησης και του έμμεσου εργοδότη.
description: The aim of the present thesis was the study of temporary employment and the legislation that regulates it. Initially, we defined temporary employment and distinguished it from similar institutions. Afterwards, we examined the contract of assignment, which is the one of the two contracts that are being made in the triangular shape of temporary employment, making specific reference to the distinction between assignment contract and project contract. Furthermore, we examined the temporary employment contract and presented analytically its regulation and the problems that emerge from particular legislative provisions. Additionally, we referred to the European Directive 2008/104/EC, which was legislated in order to harmonize the different legislations concerning temporary employment between European countries. Finally, we examined the collective aspect of temporary worker’s rights towards temporary work agency and user undertaking.
Η διαμόρφωση των πολιτικών δυνάμεων στην Ιταλία την περίοδο 1965-1980. Επιδράσεις και αποτελέσματα της «στρατηγικής της έντασης»
Creators: name: Φώτου, Κωνσταντίνα Μάνθου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Στρατηγική της έντασης
Ιταλία 1965-1980
Ακροδεξιές οργανώσεις
Strategy of tension
Italy 1965-1980
Extremist groups

description: Το αντικείμενο της συγκεκριμένης διπλωματικής εργασίας αφορά την ανάλυση του πολιτικού και κοινωνικού γίγνεσθαι στην Ιταλία την περίοδο 1960-1980. Πρόκειται, συνοπτικά, για μια περίοδο που χαρακτηρίζεται αφενός από έντονη συνδικαλιστική δράση του εργατικού και του φοιτητικού κινήματος που αντιδρούσε στις συντηρητικές δομές του μεταπολεμικού ιταλικού κράτους και αφετέρου από την πραγματοποίηση εκτεταμένων εξτρεμιστικών ενεργειών. Η ως άνω πολιτική πραγματικότητα είναι ευρύτερα γνωστή με τον όρο «στρατηγική της έντασης». Στην έρευνα, εξετάζονται διεξοδικά η επίδραση που είχε στην ιταλική κοινωνία η στρατηγική της έντασης, ο τρόπος με τον οποίο τη διαχειρίστηκαν οι πολιτικές δυνάμεις καθώς και οι ανακατατάξεις που προκάλεσε στο ιταλικό πολιτικό σκηνικό. Πιο συγκεκριμένα, αναλύεται η προγενέστερη κατάσταση καθώς και το ιταλιακό κομματικό σύστημα και γίνεται εκτενής καταγραφή των γεγονότων της περιόδου που μας ενδιαφέρει τόσο σε κοινωνικό όσο και σε πολιτικό επίπεδο. Έπειτα επιχειρείται ορισμός της “στρατηγικής της έντασης” καθώς και ανάλυση του ρόλου των μυστικών υπηρεσιών και των ακροδεξιών οργανώσεων στη στρατηγική αυτή. Τέλος δίνεται έμφαση στις κοινωνικοπολιτιστικές επιδράσεις της “στρατηγικής της έντασης” σε διάφορους τομείς της τέχνης και της κοινωνίας. Για την εκπόνηση της διπλωματικής εργασίας χρησιμοποιήθηκαν ως πηγές , οικεία βιβλιογραφία, αρχειακό υλικό του Τύπου της περιόδου (ιταλικού και ελληνικού) αλλά και διαδικτυακές πηγές.
description: The main intention of this thesis focuses on the analysis of the political and social situation in Italy during 1960-1980. Briefly, this period is determined both by strong syndicate movement of the labor and student’s associations that reacted against the conservative structures of the postwar Italian State and, secondly, by extensive extremist actions. The aforementioned political situation is actually more commonly known by the term "strategy of tension". This thesis examines extensively the effects that the strategy of tension had on Italian society, the way it was managed by political forces and the social realignment the latter caused in the Italian political sphere. More specifically, the previous situation and the Italian party system are analyzed. In addition, there is an extensive recording of the events of the period in question both in social and political perspective. Moreover, after defining the "strategy of tension", the role the secret services and far-right organizations played in this strategy is analyzed. Furthermore, the socio-cultural effects of the "strategy of tension" are emphasized, as they were reflected in various fields of art and society. Finally, the sources used for this thesis were the relevant literature, Press archives, both Italian and Greek, of the period in question and online sources.
The Alignment between Satellites and Central Galaxies: Theory vs. Observations
Creators: name: Kang, X.
name: Bosch, Frank C. van den
name: Yang, Xiaohu
name: Mao, Shude
name: Mo, H. J.
name: Li, Cheng
name: Jing, Y. P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent studies have shown that the distribution of satellite galaxies is preferentially aligned with the major axis of their central galaxy. The strength of this alignment has been found to depend strongly on the colours of the satellite and central galaxies, and only weakly on the mass of the halo in which the galaxies reside. In this paper we study whether these alignment signals, and their dependence on galaxy and halo properties, can be reproduced in a hierarchical structure formation model of a $Λ$CDM concordance cosmology. To that extent we use a large $N$-body simulation which we populate with galaxies following a semi-analytical model for galaxy formation. We find that if the orientation of the central galaxy is perfectly aligned with that of its dark matter halo, then the predicted central-satellite alignment signal is much stronger than observed. If, however, the minor axis of a central galaxy is perfectly aligned with the angular momentum vector of its dark matter halo, we can accurately reproduce the observed alignment strength as function of halo mass and galaxy color. Although this suggests that the orientation of central galaxies is governed by the angular momentum of their dark matter haloes, we emphasize that any other scenario in which the minor axes of central galaxy and halo are misaligned by $\sim 40^{\circ}$ (on average) will match the data equally well. Finally, we show that dependence of the alignment strength on the color of the central galaxy is most likely an artefact due to interlopers in the group catalogue. The dependence on the color of the satellite galaxies, on the other hand, is real and owes to the fact that red satellites are associated with subhaloes that were more massive at their time of accretion.
description: 13 Pages, 10 Figures, one figure replaced. added in discussion about comparison with others results, Updated version to match accepted version to MNRAS
Nuclear activity in galaxies driven by binary supermassive black holes
Creators: name: Lobanov, Andrei P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Nuclear activity in galaxies is closely connected to galactic mergers and supermassive black holes (SBH). Galactic mergers perturb substantially the dynamics of gas and stellar population in the merging galaxies, and they are expected to lead to formation of supermassive binary black holes (BBH) in the center of mass of the galaxies merged. A scheme is proposed here that connects the peak magnitude of the nuclear activity with evolution of a BBH system. The scheme predicts correctly the relative fractions of different types of active galactic nuclei (AGN) and explains the connection between the galactic type and the strength of the nuclear activity. It shows that most powerful AGN should result from mergers with small mass ratios, while weaker activity is produced in unequal mergers. The scheme explains also the observed lack of galaxies with two active nuclei, which is attributed to effective disruption of accretion disks around the secondary in BBH systems with masses of the primary smaller than ~10^10 solar masses.
description: 5 pages, 1 figure; contribution to ESO Astrophysical Symposia, "Relativistic Astrophysics and Cosmology", eds. B. Aschenbach, V. Burwitz, G. Hasinger, B. Leibundgut (Springer: Heidelberg 2006)
Competition between local potentials and attractive particle-particle interactions in superlattices
Creators: name: Lima, N. A.
name: Malvezzi, A. L.
name: Capelle, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Naturally occuring or man-made systems displaying periodic spatial modulations of their properties on a nanoscale constitute superlattices. Such modulated structures are important both as prototypes of simple nanotechnological devices and as particular examples of emerging spatial inhomogeneity in interacting many-electron systems. Here we investigate the effect different types of modulation of the system parameters have on the ground-state energy and the charge-density distribution of the system. The superlattices are described by the inhomogeneous attractive Hubbard model, and the calculations are performed by density-functional and density-matrix renormalization group techniques. We find that modulations in local electric potentials are much more effective in shaping the system's properties than modulations in the attractive on-site interaction. This is the same conclusions we previously (Phys. Rev. B 71, 125130) obtained for repulsive interactions, suggesting that it is not an artifact of a specific state, but a general property of modulated structures.
description: 8 pages, 2 figures
Exact solution of inflationary model with minimum length
Creators: name: Kempf, Achim
name: Lorenz, Larissa
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Within the inflationary scenario, Planck scale physics should have affected the comoving modes' initial conditions and early evolution, thereby potentially affecting the inflationary predictions for the cosmic microwave background (CMB). This issue has been studied extensively on the basis of various models for how quantum field theory (QFT) is modified and finally breaks down towards the Planck scale. In one model, in particular, an ultraviolet cutoff was implemented into QFT through generalized uncertainty relations which have been motivated from general quantum gravity arguments and from string theory. Here, we improve upon prior numerical and semi-analytical results by presenting the exact mode solutions for both de Sitter and power-law inflation in this model. This provides an explicit map from the modes' initial conditions, which are presumably set by quantum gravity, to the modes' amplitudes at horizon crossing and thus to the inflationary predictions for the CMB. The solutions' particular behaviour close to the cutoff scale suggests unexpected possibilities for how the degrees of freedom of QFT emerge from the Planck scale.
description: 19 pages, LaTeX
Singularities of projected immersions revisited
Creators: name: Lippner, Gabor
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57R45; 57R42

description: Sz\H ucs proved in 2000 that the $r$-tuple-point manifold of a generic immersion is cobordant to the $Σ^{1_{r-1}}$-point manifold of its generic projection. Here we slightly extend this by showing that the natural mappings of these manifolds are bordant to each other. The main novelty of our approach is that we construct the bordism explicitly.
description: 8 pages
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of: Maude (Schooner)
Creators: name: Davies, Gareth J.S.
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The Maude was a cargo schooner which sailed between ports in N, S Wales, N.W, S.W, S, E England, Ireland, Scotland and occasionally to Europe. Cargoes carried included raw materials. On May 7th 1917, the Maude sailing from Padstow in Cornwall to Manchester with a cargo of pipe clay was stopped by German U-boat UC-65 approximately 8 miles SW of Bardsey Island. The crew was offloaded and the Maude scuttled.
Extreme precipitation events in the Mediterranean: Spatiotemporal characteristics and connection to large-scale atmospheric flow patterns
Creators: name: Mastrantonas, Nikolaos
name: Herrera-Lormendez, Pedro
name: Magnusson, Linus
name: Pappenberger, Florian
name: Matschullat, Jörg
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Other Statistics (stat.OT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The Mediterranean is strongly affected by Extreme Precipitation Events (EPEs), sometimes leading to negative impacts on society, economy, and the environment. Understanding such natural hazards and their drivers is essential to mitigate related risks. Here, EPEs over the Mediterranean between 1979 and 2019 are analyzed, using ERA5 dataset from ECMWF. EPEs are determined based on the 99th percentile of the daily distribution (P99). The different EPE characteristics are assessed, based on seasonality and spatiotemporal dependencies. To better understand the connection to large-scale atmospheric flow patterns, Empirical Orthogonal Function (EOF) analysis and subsequent K-means clustering are used to quantify the importance of weather regimes to EPE frequency. The analysis is performed for three different variables, depicting atmospheric variability in the lower and middle troposphere: Sea level pressure (SLP), temperature at 850 hPa (T850), and geopotential height at 500 hPa (Z500). Results show a clear spatial division in EPEs occurrence, with winter (autumn) being the season of highest EPEs frequency for the eastern (western) Mediterranean. There is a high degree of temporal dependencies with 20% of the EPEs (median value of all studied grid-cells), occurring up to 1 week after a preceding P99 event at the same location. Local orography is a key modulator of the spatiotemporal connections and substantially enhances the probability of co-occurrence of EPEs even for distant locations. The clustering clearly demonstrates the prevalence of distinct synoptic-scale atmospheric conditions during the occurrence of EPEs for different locations within the region. Results indicate that clustering based on a combination of SLP and Z500 can increase the conditional probability of EPEs by more than three (3) times (median value for all grid cells) from the nominal probability of 1% for the P99 EPEs.
description: Submitted to International Journal of Climatology
Σύγχρονη Ιστορία της Φώκαιας της Μικράς Ασίας: η πόλη, ο πολιτισμός, η παιδεία, οι διωγμοί
Creators: name: Αντωνίου, Βασιλική Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Φώκαια Μικράς Ασίας
Σύγχρονη Ιστορία
Πόλη, Πολιτισμός, Παιδεία, Διωγμοί
Phocea in Minor Asia
Μodern Ηistory
City, Culture, Education, Persecutions

description: Η εργασία αυτή εκπονήθηκε στα πλαίσια του μεταπτυχιακού προγράμματος του Τμήματος Ποιμαντικής & Κοινωνικής Θεολογίας, στον Τομέα Ιστορίας & Δόγματος, διορθόξων και διαχριστανικών σχέσεων, με ειδίκευση “Ελληνισμός και Ορθοδοξία”. Το θέμα της εργασίας είναι: “Η σύγχρονη ιστορία της Φώκαιας της Μικράς Ασίας: Η πόλη, ο πολιτισμός, η παιδεία, οι διωγμοί” και χωρίζεται σε τρία μέρη. Το πρώτο μέρος της εργασίας πραγματεύεται την αρχαϊκή ιστορία της πόλης, την περίοδο της Βυζαντινής κυριαρχίας και την εκκλησιαστική ιστορία, για την Τουρκοκρατία, καθώς επίσης και για τις συνοικίες και τα καταστήματα της Παλαιάς Φώκαιας. Το δεύτερο μέρος της εργασίας μας πληροφορεί για τον πρώτο διωγμό του 1914, της Παλαιάς και Νέας Φώκαιας, όπως και για την καταστροφή των γειτονικών ελληνικών χωριών. Επίσης μιλά και για την εγκατάσταση των προσφύγων στον ελλαδικό χώρο. Το τρίτο και τελευταίο μέρος της εργασίας ασχολείται αρχικά με την παιδεία στην Φώκαια (19ος-20ος αι.), έπειτα με την Φώκαια στην Νεοελληνική Λογοτεχνία, για τις αρχαιότητες της πόλης και με την περίπτωση του φιλλέληνος αρχαιολόγου και φωτογράφου FelixSartiaux.
description: The thesis was conducted within the framework of the postgraduate program of the Department of Pastoral & Social Theology, with specialization "Hellenism and Orthodoxy". The theme of the thesis is: "the modern history of Phocea in Minor Asia : the city, the culture, the education, the persecutions" and is divided into three parts. The first part of the work deals with the archaic history of the city, the period of Byzantine rule and ecclesiastical history, for the Turks, as well as for the districts and the Old stores of Phocea. The second part of work informs us about the first persecution of 1914, the old and new Phocea, also informs us about the destruction of the neighbouring Greek villages. Also speaks and for the installation of refugees in Greece. The third and final part of the work deals with education in Phocea (19th-20th century), then with the Phocea in modern Greek Literature, for the Antiquities of the city and with the case of the French archaeologist and photographer Felix Sartiaux.
Surface Treatment of Cu:NiOx Hole-Transporting Layer Using \b{eta}-Alanine for Hysteresis-Free and Thermally Stable Inverted Perovskite Solar Cells
Creators: name: Galatopoulos, Fedros
name: Papadas, Ioannis T.
name: Ioakeimidis, Apostolos
name: Eleftheriou, Polyvios
name: Choulis, Stelios A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Inverted perovskite solar cells (PSCs) using a Cu:NiOx hole transporting layer (HTL) often exhibit stability issues and in some cases J/V hysteresis. In this work, we developed a \b{eta}-alanine surface treatment process on Cu:NiOx HTL that provides J/V hysteresis-free, highly efficient, and thermally stable inverted PSCs. The improved device performance due to \b{eta}-alanine-treated Cu:NiOx HTL is attributed to the formation of an intimate Cu:NiOx/perovskite interface and reduced charge trap density in the bulk perovskite active layer. The \b{eta}-alanine surface treatment process on Cu:NiOx HTL eliminates major thermal degradation mechanisms, providing 40 times increased lifetime performance under accelerated heat lifetime conditions. By using the proposed surface treatment, we report optimized devices with high power conversion efficiency (PCE) (up to 15.51%) and up to 1000 h lifetime under accelerated heat lifetime conditions (60 C, N2).
description: 20 pages, 12 figures
Dedica votiva di Archino nel santuario di Oropo
Creators: name: Savo, Maria Barbara
Publisher: name: Università Ca’ Foscari Venezia, Italia
Year: 2019

description:

Pentelic marble table with a brief dedicatory inscription of a patient, Archinos, found in the Amphiaraos sanctuary in Oropos during the excavations of Leonardos. The pinax, in relief, shows three significant moments of the postulant’s stay in the shrine. The narration begins on the left, where Amphiaraos is represented (with greater size if compared to the patient) intent to intervene with an instrument on Archinos’ right shoulder. Below is a scene of enkoimeterion, where Archinos, lying on a kline, is overhung by the sacred snake and touched on the right shoulder. The third image of the patient represents him at the right end of the pinax and seems to be looking and pointing at the votive table on the stele with his right hand: it is an offer as a sign of gratitude to the god.

description: Axon
Enacting Musical Worlds: Common Approaches to using NIMEs within Performance and Person-Centred Arts Practices
Creators: name: Hayes, Lauren
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences
subject: H.5.5

description: Live music making can be understood as an enactive process, whereby musical experiences are created through human action. This suggests that musical worlds coevolve with their agents through repeated sensorimotor interactions with the environment (where the music is being created), and at the same time cannot be separated from their sociocultural contexts. This paper investigates this claim by exploring ways in which technology, physiology, and context are bound up within two different musical scenarios: live electronic musical performance; and person-centred arts applications of NIMEs. In this paper I outline an ethnographic and phenomenological enquiry into my experiences as both a performer of live electronic and electro-instrumental music, as well as my extensive background in working with new technologies in various therapeutic and person-centred artistic situations. This is in order to explore the sociocultural and technological contexts in which these activities take place. I propose that by understanding creative musical participation as a highly contextualised practice, we may discover that the greatest impact of rapidly developing technological resources is their ability to afford richly diverse, personalised, and embodied forms of music making. I argue that this is applicable over a wide range of musical communities.
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: May Queen
Creators: name: Perks, Graeme
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The May Queen was a barque built in Miramachi N.B. in 1863 by William Sinclair for William Muirhead of Chatham N.B which was sold at Liverpool after the second voyage across the Atlantic. The new owners A.G. Kidston of Glasgow used the May Queen for a voyage to New Zealand returning with wool. The next voyages of the May Queen were to the Far East before returning via New York after two years. The May Queen then sailed to Demerara returning with sugar and rum. On the return voyage the May Queen struck the Sarn Badrig after a navigational mistake in a storm and the crew abandoned her sinking. The crew were picked up by a passing vessel and taken to Porthmadog. The wreck of the May Queen was washed ashore with only the rum being salvaged from the cargo.
Centrally extended symmetry algebra of asymptotically Goedel spacetimes
Creators: name: Compere, Geoffrey
name: Detournay, Stephane
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We define an asymptotic symmetry algebra for three-dimensional Goedel spacetimes supported by a gauge field which turns out to be the semi-direct sum of the diffeomorphisms on the circle with two loop algebras. A class of fields admitting this asymptotic symmetry algebra and leading to well-defined conserved charges is found. The covariant Poisson bracket of the conserved charges is then shown to be centrally extended to the semi-direct sum of a Virasoro algebra and two affine algebras.
description: 12 pages, sign mistake corrected in the central charge, takes precedence over published version
Jacobi fields and conjugate points for a projective class of sprays
Creators: name: Hajdú, S.
name: Mestdag, T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 34A26, 53B40, 58E10

description: We investigate Jacobi fields and conjugate points in the context of sprays. We first prove that the conjugate points of a spray remain preserved under a projective change. Then, we establish conditions on the projective factor so that the projectively deformed spray meets the conditions of a proposition that ensures the existence of conjugate points. We discuss our methods by means of illustrative examples, throughout the paper.
description: 18 pages, 3 figures
Magnetic flux in mesoscopic rings: Quantum Smoluchowski regime
Creators: name: Dajka, J.
name: Machura, L.
name: Rogozinski, S.
name: Luczka, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Magnetic flux in mesoscopic rings under the quantum Smoluchowski regime is investigated. Quantum corrections to the dissipative current are shown to form multistable steady states and can result in statistical enhancement of the magnetic flux. The relevance of quantum correction effects is supported v ia the entropic criterion. A possible application for a qutrit architecture of quantum information is proposed.
description: 7 pages, 2 figures
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Medoc
Creators: name: Perks, Graeme
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The Medoc was a French barque of 648 tons registered at Bordeaux owned by MM. Saint-Ange, Richon and Co. The Medoc was engaged in transporting guano from the Chinchila Islands to France. The Medoc sailed to Saigon then made journeys between Hong Kong, Saigon and Bangkok. When the emigration of Chinese men restarted Medoc carried them from Macao to Havana and apparently made two voyages. The Medoc then carried sugar from Cuba to France and finally for Liverpool. The Medoc on her voyage from Havana to Liverpool in 1869 struck Sarn Badrig (St Patricks Causeway) and was abandoned by her crew in a sinking condition. The crew safely reached shore with the aid of the RNLI lifeboat, in the own boats. The Medoc was sold as she lay near Aberdovey by the Patches and the sugar boxes which was all the remained of the cargo.
Twice imprisoned : loss of hearing, loss of power in federal prisoners in British Columbia
Creators: name: Dahl, Marilyn Olive
Publisher: name: University of British Columbia
Year: 2009

description: Problems experienced by individuals in institutions tend to be hidden from the public gaze. This is so for inmates of prisons where regulations and bureaucratic structure conceal the daily life situation of prisoners from public view. Anonymity and concealment are enhanced by the widespread misperception of prisoners as an homogenous group. As a result, problems of vulnerable groups, such as people with disabilities, can be ignored. One such group is prisoners with impaired hearing. This descriptive study utilized a multidisciplinary approach to investigate the problems experienced by prisoners within the context of social control. Drawing from selected literature in health, sociology and criminology, the theoretical framework merges the labelling perspective [interactionism] with macro-level theories of social control. The study provides, for the first time, an examination of the percentage, degree and social import of hearing loss in federal prisoners in the Pacific Region of the Correctional Service of Canada. Through the use of survey, audiometric measurement, and interview techniques, an examination was undertaken of the presence and implications of partial hearing loss in inmates of federal penitentiaries in British Columbia. Interview subjects were identified through hearing testing of volunteers in eight federal penitentiaries. Data were gathered through interviews with prisoners with impaired hearing, a comparison group of prisoners with normal hearing, and a selection of custodians. Of 114 prisoners screened, 69% had some degree of impaired hearing, often previously unidentified. Custodians, 86% of the time, labelled behaviours characteristic of the hard of hearing as deviant, and often aggressive, behaviours. Prisoner accounts revealed that failure to test hearing at time of incarceration has harmful effects on performance in programmes and encounters with the justice system. A social activist approach is recommended, to address structural inequalities among prisoners and barriers for prisoners in general. This work indicates that lower-class, lower-status persons may be more susceptible to negative labelling. Prisoners with partial hearing loss, due to the often invisible nature of their condition, are particularly vulnerable to negative labelling. Study recommendations include: 1] Routine hearing screening of all prisoners at time of incarceration. 2] Education of custodians to understand behaviours and communication needs of persons with impaired hearing. 3] A partnership effort between correctional services, the disabled consumer group, and professionals, to improve the situation of prisoners who are hard of hearing.
Οι προσθήκες και διορθώσεις του Καισάριου Δαπόντε στις ακολουθίες των μηναίων (κώδικες Ξηροποτάμου 257 και 249)
Creators: name: Ζαΐρη, Ιωάννα Στέφανου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Καισάριος Δαπόντες (1713-1784)
Μηναίο
Μονή Ξηροποτάμου
Kaisarios Dapontes (1713-1784)
Menaion
Xeropotamou Monastery

description: Σκοπός της εργασίας είναι η παρουσίαση και η ανάδειξη των διορθωτικών παρεμβάσεων που αποτόλμησε ο Καισάριος Δαπόντες προκειμένου να αποκαταστήσει τα «τραυματισμένα» (συντακτικά και υμνογραφικά, εορτολογικά)λειτουργικά κείμενα της Ορθόδοξης Εκκλησίας Για το λόγο αυτό, εξετάσαμε το αυτόγραφο χειρόγραφο 257 του συγγραφέα που φυλάσσεται στην μονή Ξηροποτάμου και το οποίο περιέχει διορθώσεις δύο έντυπων εκδόσεων των μηναίων που προωτοκυκλοφόρησαν στην Βενετία. (προσωπογραφική παρουσίαση του συγγραφέα, ιστορική εξέλιξη και οριστική διαμόρφωση των εκκλησιαστικών βιβλίων της Ορθόδοξης Εκκλησίας, ) Η εργασία ολοκληρώνεται με τη σύνοψη των συμπερασμάτων όπου καταγράφονται ορισμένες παρατηρήσεις, τόσο για τις προσπάθειες της αναθεώρησης των λειτουργικών κειμένων όσο και για το μέγεθος της προσφοράς του Καισαρίου Δαπόντε.
description: The main purpose of this dissertation is to present and highlight the corrective interventions that Caisarios Dapontes attempted to apply in order to restore the “injured” (editorial and hymnographical, church calendar) liturgical texts of the Orthodox Church. In order to investigate effectively this purpose, we examined the autograph manuscript of the writer 257 that is stored in the monastery Xeropotamou. This manuscript contains emendations of two printed versions of services of the Menaion, that were initially released in Venice. The study also includes the delineation of the psychological profile of the author and the historical development and finalization of the liturgical\ books of the Orthodox Church. The findings of this study, apart from the presentation of the manuscript, focus on reporting specific observations and conclusions about the magnitude of Daponte’s efforts to revise the liturgical texts and about the overall value of his contribution.
Effect of W and Mo co-doping on the photo- and thermally stimulated luminescence and defects creation processes in Gd3(Ga,Al)5O12:Ce crystals
Creators: name: Zazubovich, S.
name: Laguta, V.
name: Kamada, K.
name: A
name: Yoshikawa
name: Jurek, K.
name: Nikl, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Photo- and thermally stimulated luminescence characteristics of Gd3(Ga,Al)5O12:Ce single crystals co-doped with W and Mo are investigated in the 85 - 510 K temperature range and compared with the corresponding characteristics of the undoped and Ce3+ - doped Gd3(Ga,Al)5O12 single crystals of similar composition. A strong effect of the W and Mo impurity ions appears in the photoluminescence spectra and temperature dependences of the photoluminescence intensity, afterglow intensity and decay kinetics, thermally stimulated luminescence (TSL) intensity and TSL glow curves, excitation spectra of the TSL glow curve peaks and activation energy of their creation. The obtained results are explained by the enhancement of the intrinsic emission contribution into the luminescence spectrum of Gd3(Ga,Al)5O12:Ce,W and Gd3(Ga,Al)5O12:Ce,Mo due to a large concentration of various W - and Mo - related electron traps in these crystals and, consequently, the O- - type hole centers, as well as intrinsic crystal lattice defects (e.g., cation vacancies needed for the excess positive charge compensation of the W6+ and Mo6+ ions). The influence of the co-doping with W and Mo ions on the scintillation characteristics of Gd3(Ga,Al)5O12:Ce is discussed.
Magnetically-induced local lattice anomalies and low-frequency nematic fluctuations in the Mott insulator La$_2$O$_3$Fe$_2$Se$_2$
Creators: name: Hussain, Riaz
name: Prando, Giacomo
name: Selter, Sebastian
name: Aswartham, Saicharan
name: Büchner, Bernd
name: Carretta, Pietro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report a study of the Mott insulator La$_2$O$_3$Fe$_2$Se$_2$ by means of $^{139}$La nuclear quadrupole resonance (NQR). The NQR spectra evidence a single La site in the paramagnetic phase and two inequivalent La sites, La1 and La2, in the antiferromagnetically-ordered phase (Néel temperature $T_{\rm{N}} \simeq 90$ K). These two sites are characterized by different quadrupole couplings, indicative of distinct lattice and/or charge configurations likely segregated in domains. The dependence of the quadrupole coupling for La2 on temperature suggests that the magnetic order parameter drives the structural distortion. The nuclear spin-lattice and transverse relaxation rates, $1/T_1$ and $1/T_2$, evidence fluctuations in the paramagnetic phase with characteristic frequencies well below the Heisenberg exchange frequency, likely associated with nematic fluctuations.
description: 6 pages, 4 figures
Modeling T Tauri Winds from He I 10830 Profiles
Creators: name: Kwan, John
name: Edwards, Suzan
name: Fischer, William
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The high opacity of He I 10830 makes it an exceptionally sensitive probe of the inner wind geometry of accreting T Tauri stars. In this line blueshifted absorption below the continuum results from simple scattering of stellar photons, a situation which is readily modeled without definite knowledge of the physical conditions and recourse to multi-level radiative transfer. We present theoretical line profiles for scattering in two possible wind geometries, a disk wind and a wind emerging radially from the star, and compare them to observed He I 10830 profiles from a survey of classical T Tauri stars. The comparison indicates that subcontinuum blueshifted absorption is characteristic of disk winds in ~30% of the stars and of stellar winds in ~40%. We further conclude that for many stars the emission profile of helium likely arises in stellar winds, increasing the fraction of accreting stars inferred to have accretion-powered stellar winds to ~60%. Stars with the highest disk accretion rates are more likely to have stellar wind than disk wind signatures and less likely to have redshifted absorption from magnetospheric funnel flows. This suggests the possibility that when accretion rates are high, disks can extend closer to the star, magnetospheric accretion zones can be reduced in size and conditions arise that favor radially outflowing stellar winds.
description: 41 pages, 11 figures. Accepted by Astrophysical Journal