cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Parameter test ideals of Cohen Macaulay rings
Creators: name: Katzman, Mordechai
Publisher: name: arXiv
Year: 2007
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13A35; 13D45; 13P99

description: We describe an algorithm for computing parameter-test-ideals in certain local Cohen-Macaulay rings. The algorithm is based on the study of a Frobenius map on the injective hull of the residue field of the ring and on the application of Rodney Sharp's notion of ``special ideals''. Our techniques also provide an algorithm for computing indices of nilpotency of Frobenius actions on top local cohomology modules of the ring and on the injective hull of its residue field. The study of nilpotent elements on injective hulls of residue fields also yields a great simplification of the proof of the fact that for a power series ring $R$ of prime characteristic, for all nonzero $f\in R$, $1/f$ generates $R_f$ as a $D_R$-module.
description: 16 pages To appear in Compositio Mathematica
Metal-THINGS: On the metallicity and ionization of ULX sources in NGC 925
Creators: name: Lara-López, Maritza A.
name: Zinchenko, Igor A.
name: Pilyugin, Leonid S.
name: Gunawardhana, Madusha L. P.
name: López-Cruz, Omar
name: O'Sullivan, Shane P.
name: Feltre, Anna
name: Rosado, Margarita
name: Sánchez-Cruces, Mónica
name: Chevallard, Jacopo
name: De Rossi, Maria Emilia
name: Dib, Sami
name: Fritz, Jacopo
name: Fuentes-Carrera, Isaura
name: Garduño, Luis E.
name: Ibar, Eduardo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present an analysis of the optical properties of three Ultra Luminous X-ray (ULX) sources identified in NGC 925. We use Integral field unit data from the George Mitchel spectrograph in the context of the Metal-THINGS survey. The optical properties for ULX-1 and ULX-3 are presented, while the spaxel associated with ULX-2 had a low S/N, which prevented its analysis. We also report the kinematics and dimensions of the optical nebula associated with each ULX using ancillary data from the PUMA Fabry-Perot spectrograph. A BPT analysis demonstrates that most spaxels in NGC 925 are dominated by star-forming regions, including those associated with ULX-1 and ULX-3. Using the resolved gas-phase metallicities, a negative metallicity gradient is found, consistent with previous results for spiral galaxies, while the ionization parameter tends to increase radially throughout the galaxy. Interestingly, ULX-1 shows a very low gas metallicity for its galactocentric distance, identified by two independent methods, while exhibiting a typical ionization. We find that such low gas metallicity is best explained in the context of the high-mass X-ray binary population, where the low-metallicity environment favours active Roche lobe overflows that can drive much higher accretion rates. An alternative scenario invoking accretion of a low-mass galaxy is not supported by the data in this region. Finally, ULX-3 shows both a high metallicity and ionization parameter, which is consistent with the progenitor being a highly-accreting neutron star within an evolved stellar population region.
description: Accepted by ApJ
Αλληλεπίδραση του Mn(II) με φάρμακα που περιέχουν καρβοξυλική ομάδα
Creators: name: Ζαμπάκου, Μαριάνθη Χαράλαμπου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Σύμπλοκα Μn(II)
Μη-στεροειδή αντιφλεγμονώδη φάρμακα
Κινολονικά φάρμακα
Manganese (II) complexes
Non-steroidal anti-inflammatory drugs
Quinolones

description: Σκοπός της παρούσας μεταπτυχιακής εργασίας είναι η σύνθεση, ο χαρακτηρισμός της δομής και η μελέτη των βιολογικών ιδιοτήτων συμπλόκων του δισθενούς μαγγανίου με τα μη-στεροειδή αντιφλεγμονώδη φάρμακα diclofenac και tolfenamic acid και το αντιμικροβιακό κινολονικό φάρμακο oxolinic acid απουσία ή παρουσία υποκαταστατών που είναι δότες ενός (pyridine) ή δύο ατόμων Ν (1,10-phenanthroline, 2,2’-bipyridine και 2,2’-dipyridylamine). Οι σύμπλοκες ενώσεις χαρακτηρίστηκαν με φυσικοχημικές (στοιχειακές αναλύσεις, μετρήσεις μοριακής αγωγιμότητας, μαγνητικές μετρήσεις σε θερμοκρασία δωματίου) και φασματοσκοπικές τεχνικές (IR, UV-vis). Όπου κατέστη εφικτό πραγματοποιήθηκε επίλυση της κρυσταλλικής δομής με περίθλαση ακτίνων-Χ. Μελετήθηκε ο τρόπος και η ισχύς σύνδεσης με το CT DNA των συμπλόκων ενώσεων με φασματοσκοπία υπεριώδους και ιξωδομετρία. Από τη μελέτη της ανταγωνιστικής δράσης με το αιθίδιο βρωμίδιο με φασματοσκοπία φθορισμού διερευνήθηκε η ικανότητα των συμπλόκων να συνδέονται στο DNA ως παρεμβολείς. Επίσης μελετήθηκε η αλληλεπίδραση των συμπλόκων ενώσεων με αλβουμίνη ορού αίματος (ανθρώπινη και βοοειδή) και υπολογίστηκαν οι σταθερές σύνδεσής τους. Τέλος, εξετάστηκε η αντιοξειδωτική δράση των συμπλόκων ενώσεων μέσω της ικανότητας δέσμευσης ριζών.
description: The aim of the present M.Sc. Thesis was the synthesis, characterization and biological evaluation of manganese(II) complexes with the non-steroidal antiinflammatory drugs sodium diclofenac and tolfenamic acid and the quinolone antimicrobial drug oxolinic acid in the absence or presence of nitrogen donor heterocyclic ligands such as 2,2΄-bipyridine, 1,10-phenanthroline, 2,2΄-bipyridylamine and pyridine. The complexes have been characterized by physicochemical (elemental analysis, molar conductance measurements and magnetic measurements at room temperature) and spectroscopic techniques (IR, UV-vis) and have been structurally characterized by X-ray crystallography. UV studies of the complexes with DNA and viscosity measurements have shown that the complexes can bind to DNA. Competitive studies with ethidium bromide have shown that the complexes can act as intercalators. All complexes can interact with serum albumins (human and bovine) and the corresponding binding constants have been calculated. Finally, all compounds have been tested for their antioxidant and free radical scavenging activity.
Argument Shift Method and Gaudin Model
Creators: name: Rybnikov, Leonid
Publisher: name: arXiv
Year: 2006
Subjects: subject: Representation Theory (math.RT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: We construct a family of maximal commutative subalgebras in the tensor product of n copies of the universal enveloping algebra U(g) of a semisimple Lie algebra g. This family is parameterized by collections μ; z_1,...,z_n, where μ\in g^*, and z_1,...,z_n are pairwise distinct complex numbers. The construction presented here generalizes the famous construction of the higher Gaudin hamiltonians due to Feigin, Frenkel, and Reshetikhin. For n=1, our construction gives a quantization of the family of maximal Poisson-commutative subalgebras in S(g) obtained by the argument shift method. Next, we describe natural representations of commutative algebras of our family in tensor products of finite-dimensional g-modules as certain degenerations of the Gaudin model. In the case of g=sl_r we prove that our commutative subalgebras have simple spectrum in tensor products of finite-dimensional g-modules for generic μand z_i. This implies simplicity of spectrum in the "generic" sl_r Gaudin model.
description: 15 pages, references added
A variational principle for two-fluid models
Creators: name: Gavrilyuk, Sergey
name: Gouin, Henri
name: Perepechko, Yurii
Publisher: name: arXiv
Year: 2008
Subjects: subject: Classical Physics (physics.class-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A variational principle for two-fluid mixtures is proposed. The Lagrangian is constructed as the difference between the kinetic energy of the mixture and a thermodynamic potential conjugated to the internal energy with respect to the relative velocity of phases. The equations of motion and a set of Rankine-Hugoniot conditions are obtained. It is proved also that the convexity of the internal energy guarantees the hyperbolicity of the one-dimensional equations of motion linearized at rest.
description: 7 pages
The effect of an exterior electric field on the instability of dielectric plates
Creators: name: Su, Yipin
name: Chen, Weiqiu
name: Dorfmann, Luis
name: Destrade, Michel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate the theoretical nonlinear response, Hessian stability, and possible wrinkling behaviour of a voltage-activated dielectric plate immersed in a tank filled with silicone oil. Fixed rigid electrodes are placed on the top and bottom of the tank, and an electric field is generated by a potential difference between the electrodes. We solve the associated incremental boundary value problem of superimposed, inhomogeneous small-amplitude wrinkles, signalling the onset of instability. We decouple the resulting bifurcation equation into symmetric and antisymmetric modes. For a neo-Hookean dielectric plate, we show that a potential difference between the electrodes can induce a thinning of the plate and thus an increase of its planar area, similar to the scenarios encountered when there is no silicone oil. However, we also find that, depending on the material and geometric parameters, an increasing applied voltage can also lead to a thickening of the plate, and thus a shrinking of its area. In that scenario, Hessian instability and wrinkling bifurcation may then occur spontaneously once some critical voltages are reached.
Being open to possibilities : developing a liberatory practice in adult special education
Creators: name: Bjerrisgaard, Linda
Publisher: name: University of British Columbia
Year: 2009

description: Action research was conducted in a college setting with adult special education students while seeking to answer the question: What do these students really need to know in order to be employable? This paper examines and reflects upon critical incidents, journal writing, transciptions of video sessions and documents of the time involving students and colleagues over a period of six years. Using perspectives from counselling psychology, curriculum theory, and action research six themes emerge as recurring focal points of reflection and change: communication, behavior, patterns, roles, relationships, and structure. Research is concluded through three levels of reflection on person, problem and method. The teacher/researcher moves from a perspective of "doing to students" to one of "being with students" (responsive teaching). It is suggested that Adult Special Education students need to gain an understanding of themselves as learners and as social beings within a social context. Action research methodology became the teaching methodology.
Introduction to Lydia Maria Child's Letter to Harriet Jacobs
Creators: name: Hessney, Emily
Publisher: name: University of Rochester
Year: 2024
Subjects: classificationCode: 470307
subject: English language
classificationCode: 43
subject: History, heritage and archaeology
classificationCode: 430321
subject: North American history

description: Students in two of Professor Robert Westbrook's courses in American intellectual history, "The American Mind, 1600-1865" (History 267) and "The American Mind, 1865-1990" (History 268), use manuscript materials as part of a research assignment. This assignment, called "Other People's Mail," requires that students transcribe a document and write an introduction to it, placing the document in its context and suggesting the ways in which it bears on significant themes in the course.

Please Note: All rights regarding the papers rest with the authors. The images of the manuscripts may not be reproduced without obtaining prior written permission from the Department of Rare Books and Special Collections.
This document was adapted from a webpage hosted on the Rare Books, Special Collections, and Manuscripts website, before being converted into a static document and uploaded to URRR on 2024-10-03.
A deep learning modeling framework to capture mixing patterns in reactive-transport systems
Creators: name: Jagtap, N. V.
name: Mudunuru, M. K.
name: Nakshatrala, K. B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Prediction and control of chemical mixing are vital for many scientific areas such as subsurface reactive transport, climate modeling, combustion, epidemiology, and pharmacology. Due to the complex nature of mixing in heterogeneous and anisotropic media, the mathematical models related to this phenomenon are not analytically tractable. Numerical simulations often provide a viable route to predict chemical mixing accurately. However, contemporary modeling approaches for mixing cannot utilize available spatial-temporal data to improve the accuracy of the future prediction and can be compute-intensive, especially when the spatial domain is large and for long-term temporal predictions. To address this knowledge gap, we will present in this paper a deep-learning (DL) modeling framework applied to predict the progress of chemical mixing under fast bimolecular reactions. This framework uses convolutional neural networks (CNN) for capturing spatial patterns and long short-term memory (LSTM) networks for forecasting temporal variations in mixing. By careful design of the framework -- placement of non-negative constraint on the weights of the CNN and the selection of activation function, the framework ensures non-negativity of the chemical species at all spatial points and for all times. Our DL-based framework is fast, accurate, and requires minimal data for training.
Byzantine Fault Tolerance for Nondeterministic Applications
Creators: name: Zhao, Wenbing
Publisher: name: arXiv
Year: 2007
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: All practical applications contain some degree of nondeterminism. When such applications are replicated to achieve Byzantine fault tolerance (BFT), their nondeterministic operations must be controlled to ensure replica consistency. To the best of our knowledge, only the most simplistic types of replica nondeterminism have been dealt with. Furthermore, there lacks a systematic approach to handling common types of nondeterminism. In this paper, we propose a classification of common types of replica nondeterminism with respect to the requirement of achieving Byzantine fault tolerance, and describe the design and implementation of the core mechanisms necessary to handle such nondeterminism within a Byzantine fault tolerance framework.
description: To appear in the proceedings of the 3rd IEEE International Symposium on Dependable, Autonomic and Secure Computing, 2007
Διγλωσσία και γονεϊκή εμπλοκή: στάσεις και πρακτικές των γονέων δίγλωσσων παιδιών
Creators: name: Ζαχαριάδου, Ελένη Λαζάρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: διγλωσσία
γονεϊκή εμπλοκή
στάσεις, πρακτικές γονέων
bilingualism
parent involvement
parents’ attitudes, practices

description: Τα ζητήματα της διγλωσσίας, της εκπαίδευσης και της γονεϊκής εμπλοκής απασχολούν τους γονείς των δίγλωσσων παιδιών, που δείχνουν γενικά θετικές στάσεις, αν και δε συνοδεύονται πάντα από έμπρακτη υποστήριξη. Το σχολείο παίζει σημαντικό ρόλο για όλα αυτά, αλλά τουλάχιστον όσο αφορά τη διγλωσσία διατηρεί ακόμη μεγάλη απόσταση από την οικογένεια, ενώ και η μεταξύ τους συνεργασία έχει μεγάλα περιθώρια βελτίωσης. Η γλωσσική μετατόπιση στις νέες γενιές θα είναι αναπόφευκτη αν οι δύο πλευρές δε συνεργαστούν έχοντας κοινούς στόχους για τη γλωσσική ανάπτυξη των παιδιών. Οι εκπαιδευτικοί έχουν τη δύναμη να συμβάλουν θετικά στην εξέλιξή τους, όμως οι ατομικές προσπάθειες δεν επαρκούν. Και επειδή η διγλωσσία δεν είναι μόνο ζήτημα εκπαιδευτικό, αλλά είναι χρωματισμένο ιδεολογικά και πολιτικά, θα πρέπει η πολιτεία να διατυπώσει σαφείς και εφαρμόσιμες θέσεις για ένα τόσο μεγάλο θέμα.
description: The issues of bilingualism, education and parental involvement are of interest to parents of bilingual children, who generally show positive attitudes, although not always accompanied by practical support. The school plays an important role in all this, but at least with regard to bilingualism still has a great distance from the family, while their co-operation has much room for improvement. The language shift in new generations will be inevitable if the two sides (parents, school) do not work with common goals for the language development of children. Teachers have the power to positively contribute to their development, but individual efforts are not enough. And because bilingualism is not only a matter of education, but it is colored ideologically and politically, the state will need to make clear and implementable proposals for such a big issue.
An exact isotropic solution
Creators: name: John, A. J.
name: Maharaj, S. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The condition for pressure isotropy is reduced to a recurrence equation with variable, rational coefficients of order three. We prove that this difference equation can be solved in general. Consequently we can find an exact solution to the field equations corresponding to a static spherically symmetric gravitational potential in terms of elementary functions. The metric functions, the energy density and the pressure are continuous and well behaved which implies that this solution could be used to model the interior of a relativistic sphere. The model satisfies a barotropic equation of state in general which approximates a polytrope close to the stellar centre.
description: 7 pages, to appear in Il Nuovo Cimento B
Harmand, Walt Whitman to Nat Bloom Letter
Creators: name: Harmand, Ian
Publisher: name: University of Rochester
Year: 2024
Subjects: classificationCode: 43
subject: History, heritage and archaeology
classificationCode: 430321
subject: North American history
classificationCode: 470307
subject: English language

description: Students in two of Professor Robert Westbrook's courses in American intellectual history, "The American Mind, 1600-1865" (History 267) and "The American Mind, 1865-1990" (History 268), use manuscript materials as part of a research assignment. This assignment, called "Other People's Mail," requires that students transcribe a document and write an introduction to it, placing the document in its context and suggesting the ways in which it bears on significant themes in the course. The student essay along with transcriptions of the documents and images of the originals letters, have been digitized and included. Individual scanned page images are supplied, along with them compiled into a PDF together for convenience.

Please Note: All rights regarding the papers rest with the authors. The images of the manuscripts may not be reproduced without obtaining prior written permission from the Department of Rare Books and Special Collections.
This document was adapted from a webpage hosted on the Rare Books, Special Collections, and Manuscripts website, before being converted into a static document and uploaded to URRR on 2024-10-03.
Low-energy effects in brane worlds: Liennard-Wiechert potentials and Hydrogen Lamb shift
Creators: name: Morales-Técotl, Hugo A.
name: Pedraza, Omar
name: Pimentel, Luis O.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Testing extra dimensions at low-energies may lead to interesting effects. In this work a test point charge is taken to move uniformly in the 3-dimensional subspace of a (3+$n$)-brane embedded in a (3+$n$+1)-space with $n$ compact and one warped infinite spatial extra dimensions. We found that the electromagnetic potentials of the point charge match standard Liennard-Wiechert's at large distances but differ from them close to it. These are finite at the position of the charge and produce finite self-energies. We also studied a localized Hydrogen atom and take the deviation from the standard Coulomb potential as a perturbation. This produces a Lamb shift that is compared with known experimental data to set bounds for the parameter of the model. This work provides details and extends results reported in a previous Letter.
description: Manuscript (LaTeX) and 2 figure files (eps format) used by the manuscript LaTeX file
Μαθησιακές δυσκολίες και Μαθησιακό ύφος:
Creators: name: Μπλιούκα, Βασιλική Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Μαθησιακές δυσκολίες
Μαθησιακό ύφος
Στρατηγικές επίλυσης προβλήματος
Learning disabilities
Learning style
Problem solving strategies

description: Η παρούσα έρευνα σκοπό είχε να διερευνήσει, αν διαστάσεις του μαθησιακού ύφους διαφοροποιούνται ανάμεσα σε μαθητές με και χωρίς μαθησιακές δυσκολίες. Ακόμη εξετάστηκε αν, γνωστικές στρατηγικές επίλυσης προβλήματος στα μαθηματικά και σε αφηγηματικές ιστορίες διαφοροποιούνται σε μαθητές με μαθησιακές δυσκολίες και μαθητές χωρίς μαθησιακές δυσκολίες. Επιπλέον, τα δεδομένα των διαστάσεων του μαθησιακού ύφους και των στρατηγικών επίλυσης προβλήματος συσχετίστηκαν με το δείκτη επάρκειας και τις υποδοκιμασίες της προσαρμοσμένης και σταθμισμένης έκδοσης στα ελληνικά του DTLA-4. Η έρευνα πραγματοποιήθηκε σε δείγμα 59 μαθητών τετάρτης και πέμπτης δημοτικού με και χωρίς μαθησιακές δυσκολίες. Βρέθηκε διαφοροποίηση στις στρατηγικές επίλυσης προβλήματος με λόγο στους μαθητές με και χωρίς μαθησιακές δυσκολίες και, συσχέτιση των στρατηγικών αυτών με τις μεθόδους επεξεργασίας στους μαθητές με μαθησιακές δυσκολίες. Επίσης, βρέθηκε ότι μέθοδοι επεξεργασίας και στρατηγικές επίλυσης προβλήματος συσχετίζονται με κάποιες υποδοκιμασίες του DTLA-4.
description: The main objective of this study was to investigate, if learning style dimensions differentiate between learning disabled students and non-learning disabled students. It was also examined if problem solving strategies in math word problems and narrative stories differentiate between learning disabled students and non-learning disabled students. Furthermore, the data of learning style dimensions and problem solving strategies were correlated with the DTLA-4 (Detroit Test of Learning Aptitude-4) in Greek. The survey involved 59 LD students and NLD students, studying at fourth and fifth grades of primary school. It was found that problem solving strategies in narrative stories differentiate between learning disabled students and non-learning disabled students and that, these strategies correlate with the processing methods of LD students. It was also found that problem solving strategies and processing methods correlate with some DTLA-4 in Greek subtests.
Precise mass-dependent QED contributions to leptonic g-2 at order alpha^2 and alpha^3
Creators: name: Passera, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Improved values for the two- and three-loop mass-dependent QED contributions to the anomalous magnetic moments of the electron, muon, and tau lepton are presented. The Standard Model prediction for the electron (g-2) is compared with its most precise recent measurement, providing a value of the fine-structure constant in agreement with a recently published determination. For the tau lepton, differences with previously published results are found and discussed. An updated value of the fine-structure constant is presented in "Note added after publication."
description: 6 pages, 1 figure. v2: New determination of alpha presented (based on the recent electron g-2 measurement). v3: New formulae added in Sec.IIB. v4: Updated value of alpha presented
Regularity of Hölder continuous solutions of the supercritical quasi-geostrophic equation
Creators: name: Constantin, Peter
name: Wu, Jiahong
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 76D03, 35Q35

description: We present a regularity result for weak solutions of the 2D quasi-geostrophic equation with supercritical ($α< 1/2$) dissipation $(-Δ)^α$ : If a Leray-Hopf weak solution is Hölder continuous $θ\in C^δ({\mathbb R}^2)$ with $δ>1-2α$ on the time interval $[t_0, t]$, then it is actually a classical solution on $(t_0,t]$.
Αρχή της προφύλαξης: προσέγγιση του κανονιστικού της περιεχομένου και εφαρμογή της αρχής από το Ελληνικό Συμβούλιο της Επικρατείας
Creators: name: Μπιτσάνη, Μαρία-Ειρήνη Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Προφύλαξη
Διακινδύνευση
Αναλογικότητα
Precautionary
Risk
Proportionality

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη της αρχής της προφύλαξης στην εποχή της διακινδύνευσης σε επίπεδο θετού, ελληνικού, κοινοτικού και διεθνούς δικαίου καθώς και η εφαρμογή αυτής από το ελληνικό Συμβούλιο της Επικρατείας. Αρχικά, εξετάσαμε τα στοιχεία που συνθέτουν το εννοιολογικό περιεχόμενο της αρχής στα πλαίσια των ορισμών που έχουν δοθεί από τα διεθνή και κοινοτικά κείμενα. Από τη μελέτη αυτή διαπιστώσαμε ότι υφίστανται διαφορετικές αντιλήψεις σχετικά με την έκταση του προστατευτικού πεδίου της αρχής, καθώς και την κανονιστική δεσμευτικότητα αυτής. Στη συνέχεια επιχειρήσαμε να προσδιορίσουμε τις βασικές έννοιες των στοιχείων εκείνων που λαμβάνονται υπόψη για τον προσδιορισμό του κανονιστικού περιεχομένου της αρχής, δηλαδή την έννοια του αποδεκτού κινδύνου, την εν στενεί εννοία αναλογικότητα και το κριτήριο του οικονομικά εφικτού μέτρου. Από τα ανωτέρω συμπεράναμε ότι η αρχή της προφύλαξης συνιστά ένα νέο δικαϊκό παράδειγμα ενόψει της νέας σχέσης δικαίου επιστήμης που επιβάλει. Ακολούθως, εξετάσαμε την εφαρμογή της αρχής από το ελληνικό Συμβούλιο της Επικρατείας μέσω σχετικής κατηγοριοποίησης των περιπτώσεων και διαπιστώσαμε την εφαρμογή της αρχής άλλοτε ως ερμηνευτικού κριτηρίου και άλλοτε μέσω του ελέγχου της αιτιολογίας των προσβαλλόμενων πράξεων.
description: The aim of the present thesis was the study of the precautionary principle in the time of risk throughout the written greek, communitarian and international law, as well as the implementation of this principle by the greek Supreme Administrative Court. Firstly, we examined the elements determining the meaning of the principle in the frame of the determinations given by international and communitarian texts. Throughout this study we noted that there are deferent perceptions regarding the extent of the protecting scope of this principle, as well as its ruling status. Furthermore, we attended to determine the basic elements to be taken into consideration in the determination of the meaning of this principle, namely the accepted risk, the principle of proportionality stricto sensu and the criteria of economically feasible measure. In the view of the above we concluded that the principle of precaution constitutes a new law paradigm in the light of the new relation between law and science that the principle imposes. Furthermore, by categorizating the cases we examined the implementation of this principle by the greek Supreme Administrative Court and we concluded that the Court applies the principle either as a criteria of interpretation, or throughout the examination of the contested act reasoning.
Glue in the pomeron from nonlinear k_\perp-factorization
Creators: name: Nikolaev, N. N.
name: Schäfer, W.
name: Zakharov, B. G.
name: Zoller, V. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive the nonlinear k_\perp-factorization for the spectrum of jets in high-mass diffractive deep inelastic scattering as a function of three hard scales - the virtuality of the photon Q^2, the transverse momentum of the jet and the saturation scale Q_A. In contrast to all other hard reactions studied so far, we encounter a clash between the two definitions of the glue in the pomeron -- from the inclusive spectrum of leading quarks and the small-βevolution of the diffractive cross section. This clash casts a further shadow on customary applications of the familiar collinear factorization to a pQCD analysis of diffractive deep inelastic scattering.
description: 9 pages
Feasibility of Standard and Novel Solvers in Atmospheric Tomography
Creators: name: Stadler, Bernadett
name: Ramlau, Ronny
name: Biasi, Roberto
Publisher: name: Zenodo
Year: 2019

description: Poster Presentation at the "Adaptive Optics for Extremely Large Telescopes" (AO4ELT6), June 9-14, 2019, Québec (Canada).
Twisted differential K-characters and D-branes
Creators: name: Ruffino, Fabio Ferrari
name: Barriga, Juan Carlos Rocha
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Algebraic Topology (math.AT)
subject: Differential Geometry (math.DG)
subject: K-Theory and Homology (math.KT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We analyse in detail the language of partially non-abelian Deligne cohomology and of twisted differential K-theory, in order to describe the geometry of type II superstring backgrounds with D-branes. This description will also provide the opportunity to show some mathematical results of independent interest. In particular, we begin classifying the possible gauge theories on a D-brane or on a stack of D-branes using the intrinsic tool of long exact sequences. Afterwards, we recall how to construct two relevant models of differential twisted K-theory, paying particular attention to the dependence on the twisting cocycle within its cohomology class. In this way we will be able to define twisted K-homology and twisted Cheeger-Simons K-characters in the category of simply-connected manifolds, eliminating any unnatural dependence on the cocycle. The ambiguity left for non simply-connected manifolds will naturally correspond to the ambiguity in the gauge theory, following the previous classification. This picture will allow for a complete characterization of D-brane world-volumes, the Wess-Zumino action and topological D-brane charges within the K-theoretical framework, that can be compared step by step to the old cohomological classification. This has already been done for backgrounds with vanishing B-field; here we remove this hypothesis.
description: 75 pages, to appear in Nuclear Physics, Section B
Επισκόπηση της τήρησης των συμβάσεων προστασίας Ανθρωπίνων Δικαιωμάτων στην Αραβική Δημοκρατία της Αιγύπτου:
Creators: name: Μαρτίνης, Χρήστος Αριστοτέλη
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Αίγυπτος
Αραβικές Επαναστάσεις
Ανθρώπινα Δικαιώματα
Egypt
Arab spring
human rights

description: Παράλληλα με τις διαδηλώσεις στο Κάιρο από τις 25 Ιανουαρίου ως και τις 11 Φεβρουαρίου του 2011 έγιναν, σε πολλές πόλεις της Αιγύπτου ,διαδηλώσεις με αιτήματα που αποτύπωναν δικαιώματα που προστατεύονται από Διεθνείς Συμβάσεις Προστασίας Ανθρωπίνων Δικαιωμάτων. Με αφορμή την εκδήλωση της έντονης αντίθεσης μεταξύ των διεθνών υποχρεώσεων της Αιγύπτου και της πραγματικής προστασίας των Ανθρωπίνων Δικαιωμάτων επιχειρείται η ανάλυση της σχέσης μεταξύ Αιγύπτου και Διεθνών Συμβάσεων Προστασίας των Ανθρωπίνων Δικαιωμάτων.Το πρώτο κεφάλαιο, χωρίς να επικεντρώνεται σε μία χώρα καθορίζει τους παράγοντες εφαρμογής μίας Σύμβασης Προστασίας. Στη συνέχεια, διασαφηνίζει εάν η Αίγυπτος, μέλος των Διεθνών Συμβάσεων Προστασίας των Ανθρωπίνων Δικαιωμάτων, μέσα από αναδρομή στη σύγχρονη πολιτική ιστορία της Αιγύπτου με στόχο να γίουν περισσότερο κατανοητά τα συμπεράσματα από την επισκόπηση της προστασίας των Ανθρωπίνων Δικαιωμάτων στην Αίγυπτο σήμερα. Το Δεύτερο Κεφάλαιο μέσα από κρατικές αναφορές , από αναφορές των Ηνωμένων Εθνών , εσωτερικών και διεθνών Μη-Κυβερνητικών οργανισμών ταξινομεί τις σημαντικότερες παραβιάσεις των Ανθρωπίνων Δικαιωμάτων στη χώρα.Θέληση του γράφοντος είναι να εντάξει τελικά, την εξέγερση του Ιανουαρίου στο γενικότερο πλαίσιο αλληλεπίδρασης Ανθρωπίνων Δικαιωμάτων- Αιγύπτου και να παρουσιάσει την πραγματική πλευρά της προστασίας των ανθρωπίνων δικαιωμάτων φανερώνοντας την αργή αλληλεπίδραση τους με την κοινωνία.
description: The paper examines the recent egyptian revolution under the prism of the protection of human rights.. Starting from the observation that the basic claims of the egyptian revolution were based in the human rights theory, this paper search the history of human rghts in Egypt. In the first Chaprer the paper examines the political history of Egypt after the second World War and the reasons that Egypt ratified the Principal Human Rights Conventions. On the second chapter the paper examines the compliance of Egypt with the international human rights standards which are imposed by the Human Rights Conventions. The research was based on papers and international reports for the Human Rigts condition in Egypt the last 30 years.
Fourier relationship between angular position and optical orbital angular momentum
Creators: name: Yao, Eric
name: Franke-Arnold, Sonja
name: Courtial, Johannes
name: Barnett, Stephen
name: Padgett, Miles
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: We demonstrate the Fourier relationship between angular position and angular momentum for a light mode. In particular we measure the distribution of orbital angular momentum states of light that has passed through an aperture and verify that the orbital angular momentum distribution is given by the complex Fourier-transform of the aperture function. We use spatial light modulators, configured as diffractive optical components, to define the initial orbital angular momentum state of the beam, set the defining aperture, and measure the angular momentum spread of the resulting beam. These measurements clearly confirm the Fourier relationship between angular momentum and angular position, even at light intensities corresponding to the single photon level.
description: 4 pages, 4 figures
Electrostatically tunable axisymmetric vibrations of soft electro-active tubes
Creators: name: Zhu, Fangzhou
name: Wu, Bin
name: Destrade, Michel
name: Chen, Weiqiu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Due to their unique electromechanical coupling properties, soft electro-active (SEA) resonators are actively tunable, extremely suitable, and practically important for designing the next-generation acoustic and vibration treatment devices. In this paper, we investigate the electrostatically tunable axisymmetric vibrations of SEA tubes with different geometric sizes. We consider both axisymmetric torsional and longitudinal vibrations for an incompressible SEA cylindrical tube under inhomogeneous biasing fields induced by radial electric voltage and axial pre-stretch. We then employ the state-space method, which combines the state-space formalism in cylindrical coordinates with the approximate laminate technique, to derive the frequency equations for two separate classes of axisymmetric vibration of the tube subjected to appropriate boundary conditions. We perform numerical calculations to validate the convergence and accuracy of the state-space method and to illuminate that the axisymmetric vibration characteristics of SEA tubes may be tuned significantly by adjusting the electromechanical biasing fields as well as altering the tube geometry. The reported results provide a solid guidance for the proper design of tunable resonant devices composed of SEA tubes
Optical Cloaking with Non-Magnetic Metamaterials
Creators: name: Cai, Wenshan
name: Chettiar, Uday K.
name: Kildishev, Alexander V.
name: Shalaev, Vladimir M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Artificially structured metamaterials have enabled unprecedented flexibility in manipulating electromagnetic waves and producing new functionalities, including the cloak of invisibility based on coordinate transformation. Here we present the design of a non-magnetic cloak operating at optical frequencies. The principle and structure of the proposed cylindrical cloak are analyzed, and the general recipe for the implementation of such a device is provided. The cloaking performance is verified using full-wave finite-element simulations.
description: 10 pages, 4 figures
Dynamics of two-dimensional coherent structures in nonlocal nonlinear media
Creators: name: Yakimenko, A. I.
name: Lashkin, V. M.
name: Prikhodko, O. O.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We study stability and dynamics of the single cylindrically symmetric solitary structures and dipolar solitonic molecules in spatially nonlocal media. The main properties of the solitons, vortex solitons, and dipolar solitons are investigated analytically and numerically. The vortices and higher-order solitons show the transverse symmetry-breaking azimuthal instability below some critical power. We find the threshold of the vortex soliton stabilization using the linear stability analysis and direct numerical simulations. The higher-order solitons, which have a central peak and one or more surrounding rings, are also demonstrated to be stabilized in nonlocal nonlinear media. Using direct numerical simulations, we find a class of radially asymmetric, dipole-like solitons and show that, at sufficiently high power, these structures are stable.
description: 8 pages, 10 figures
The First Dynamical Mass Determination of a Nitrogen-rich Wolf-Rayet Star using a Combined Visual and Spectroscopic Orbit
Creators: name: Richardson, Noel D.
name: Lee, Laura
name: Schaefer, Gail
name: Shenar, Tomer
name: Sander, Andreas A. C.
name: Hill, Grant M.
name: Fullard, Andrew G.
name: Monnier, John D.
name: Anugu, Narsireddy
name: Davies, Claire L
name: Gardner, Tyler
name: Lanthermann, Cyprien
name: Kraus, Stefan
name: Setterholm, Benjamin R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the first visual orbit for the nitrogen-rich Wolf-Rayet binary, WR 133 (WN5o + O9I) based on observations made with the CHARA Array and the MIRC-X combiner. This orbit represents the first visual orbit for a WN star and only the third Wolf-Rayet star with a visual orbit. The orbit has a period of 112.8 d, a moderate eccentricity of 0.36, and a separation of $a$= 0.79 mas on the sky. We combine the visual orbit with an SB2 orbit and Gaia parallax to find that the derived masses of the component stars are $M_{\rm WR}$ = $9.3\pm1.6 M_\odot$ and $M_{\rm O}$ = $22.6\pm 3.2 M_\odot$, with the large errors owing to the nearly face-on geometry of the system combined with errors in the spectroscopic parameters. We also derive an orbital parallax that is identical to the {\it Gaia}-determined distance. We present a preliminary spectral analysis and atmosphere models of the component stars, and find the mass-loss rate in agreement with polarization variability and our orbit. However, the derived masses are low compared to the spectral types and spectral model. Given the close binary nature, we suspect that WR 133 should have formed through binary interactions, and represents an ideal target for testing evolutionary models given its membership in the cluster NGC 6871.
description: Accepted to ApJ Letters
Hypervelocity Stars II. The Bound Population
Creators: name: Brown, Warren R.
name: Geller, Margaret J.
name: Kenyon, Scott J.
name: Kurtz, Michael J.
name: Bromley, Benjamin C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Hypervelocity stars (HVSs) are stars ejected completely out of the Milky Way by three-body interactions with the massive black hole in the Galactic center. We describe 643 new spectroscopic observations from our targeted survey for HVSs. We find a significant (3.5 sigma) excess of B-type stars with large velocities +27510 kpc that are most plausibly explained as a new class of HVSs: stars ejected from the Galactic center on bound orbits. If a Galactic center ejection origin is correct, the distribution of HVSs on the sky should be anisotropic for a survey complete to a fixed limiting apparent magnitude. The unbound HVSs in our survey have a marginally anisotropic distribution on the sky, consistent with the Galactic center ejection picture.
description: 8 pages, accepted to ApJ
Η αναπαράσταση της Εβραϊκής ταυτότητας και της Shoah στην σύγχρονη ιταλική λογοτεχνία: το πρόβλημα του ‘ανείπωτου’ και του ‘μη περιγράψιμου’ και η λογοτεχνική γραφή ως ιστορική μαρτυρία: Η περίπτωση των Giorgio Bassani και Primo Levi
Creators: name: Σκοτάδη, Χριστίνα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Εβραίος
Μνήμη
Ολοκαύτωμα
Jew
Memory
Shoah

description: Η παρούσα διπλωματική ασχολείται με ένα έντονο ηθικό πρόβλημα που αφορά στη Shoah και το οποίο θα αποτελέσει τον πυρήνα της συγκεκριμένης ερευνητικής προσπάθειας. Καμιά καλλιτεχνική ή πνευματική αναπαράσταση δεν έχει καταφέρει να συλλάβει και να εκφράσει σε όλο της το μέγεθος την τραγικότητα και τη θηριωδία της γενοκτονίας των Εβραίων, ενώ δεν αποκλείεται αυτό το έλλειμμα καταγραφής να υποκρύπτει την αδυναμία μας ή την άρνησή μας να επεξεργαστούμε ακόμα το οριακό αυτό γεγονός και να καθομολογήσουμε την ιστορική αλήθεια. Τα λογοτεχνικά κείμενα του Bassani βασίζονται στην έννοια της ιστορικής λήθης ενώ του Primo Levi της ιστορικής μνήμης. Και οι δύο ωστόσο, εβραϊκής καταγωγής, διατηρούν ένα λογοτεχνικό ύφος που ισορροπεί ανάμεσα στην ποιητική και την ιστορική γραφή. Μας ενδιαφέρει να δούμε τον τρόπο με τον οποίο οι δύο συγγραφείς περιγράφουν και επεξεργάζονται την ίδια οριακή εμπειρία και την σημασία που έχει η μνήμη και η λήθη στην συγγραφική τους δραστηριότητα. Τον τρόπο που η Shoah, το εβραϊκό ζήτημα δηλαδή, υπάρχει ως ‘ανείπωτο’ στον Bassani και ως ‘μη περιγράψιμο’ στον Levi. Η μνήμη και η λήθη δημιουργούν ουσιαστικά ένα είδος ‘Παλιδρόμησης’ μέσα από την οποία η ανθρωπότητα αντιμετώπισε και αντιμετωπίζει ουσιαστικά το ζήτημα της γενοκτονία των Εβραίων.
description: The current thesis focuses on a strong moral problem about Shoah which will be the central point in this specific research effort. No artistic representation is sufficient to capture and fully express the tragedy and brutality of the genocide of the Jews, on the other hand, we may have not managed or even may not want to process yet this marginal fact and say the whole historical truth. Bassani’s literary texts are based on the concept of historical oblivion while Primo Levi's ones, on historical memory. Yet both of them, with Jewish background, maintain a literary style that balances between poetic and historical writing. We are interested in seeing how the two authors describe and process the same marginal experience and the importance of memory and oblivion in their literary activity. That is, the way in which Shoah and the Jewish issue exists as “ineffable” in Bassani and as “non describable” in Levi. Memory and oblivion actually create a kind of ‘Regression’ through which humanity has basically faced and faces the question of the genocide of the Jews.
Coupled convection and internal gravity waves excited in water around its density maximum at 4°C
Creators: name: Léard, Pierre
name: Favier, Benjamin
name: Gal, Patrice Le
name: Bars, Michael Le
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Coupled mixed convective and stratified systems are common in natural flows. To study experimentally the associated dynamics, we use a singular property of water: its non-linear equation of state is characterised by a maximum density close to $4^{\circ}$C. By heating the top of a tank at $35^{\circ}$C and cooling the bottom at $0^{\circ}$C, a two-layer configuration spontaneously appears. The convective motion in the bottom layer consists mostly of a large-scale circulation and rising cold plumes. This turbulent flow generates propagating internal gravity waves in the upper stably-stratified layer. PIV measurements are performed and spectral characteristics of the convection and internal gravity waves are presented. An horizontal large-scale reversing flow in the stratified layer is observed which is viscously driven by a third, intermediate layer. This buffer layer is located between the convective and stratified layers and is thermally coupled with the convective one, hence sustaining a strong horizontal shear. Three dimensional direct numerical simulations with geometry and physical parameters close to the experimental ones corroborate our experimental results.
description: 21 pages. 22 figures
Vertical Integration in Agriculture
Creators: name: Scoville, O. J.
name: Mighell, R. L.
Publisher: name: Unknown
Year: 1957
Subjects: Agribusiness
Farm Management
Research and Development/Tech Change/Emerging Technologies
Risk and Uncertainty

description: [Contents:] I. What is Meant by Vertical Integration. II. The Economic Area Within Which Integration Takes Place. III. Types of Integration or Control. IV. Development of Vertical Integration. V. Present Extent of Integration. VI. Effects of Integration. VII. Problems Arising from Increased Integration of Production. VIII. Selected References
description: Presented by O. J. Scoville and R. L. Mighell of the Farm Economics Research Division, ARS, USDA, to a joint Seminar of the Federal Extension Service and the Farmer Cooperative Service.
Entanglement Entropy of Excited States in the Quantum Lifshitz Model
Creators: name: Angel-Ramelli, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this work we calculate the entanglement entropy of certain excited states of the quantum Lifshitz model. The quantum Lifshitz model is a 2 + 1-dimensional bosonic quantum field theory with an anisotropic scaling symmetry between space and time that belongs to the universality class of the quantum dimer model and its generalizations. The states we consider are constructed by exciting the eigenmodes of the Laplace-Beltrami operator on the spatial manifold of the model. We perform a replica calculation and find that, whenever a simple assumption is satisfied, the bipartite entanglement entropy of any such excited state can be evaluated analytically. We show that the assumption is satisfied for all excited states on the rectangle and for almost all excited states on the sphere and provide explicit examples in both geometries. We find that the excited state entanglement entropy obeys an area law and is related to the entanglement entropy of the ground state by two universal constants. We observe a logarithmic dependence on the excitation number when all excitations are put onto the same eigenmode.
description: 48 pages, 13 figures; v2: references added
Continuous and Pulsed Quantum Zeno Effect
Creators: name: Streed, Erik W.
name: Mun, Jongchul
name: Boyd, Micah
name: Campbell, Gretchen K.
name: Medley, Patrick
name: Ketterle, Wolfgang
name: Pritchard, David E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Continuous and pulsed quantum Zeno effects were observed using a $^{87}$Rb Bose-Einstein condensate(BEC). Oscillations between two ground hyperfine states of a magnetically trapped condensate, externally driven at a transition rate $ω_R$, were suppressed by destructively measuring the population in one of the states with resonant light. The suppression of the transition rate in the two level system was quantified for pulsed measurements with a time interval $δt$ between pulses and continuous measurements with a scattering rate $γ$. We observe that the continuous measurements exhibit the same suppression in the transition rate as the pulsed measurements when $γδt=3.60(0.43)$, in agreement with the predicted value of 4. Increasing the measurement rate suppressed the transition rate down to $0.005ω_R$.
description: 5 pages, 4 figures