cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The QCD Sign Problem for Small Chemical Potential
Creators: name: Splittorff, K.
name: Verbaarschot, J. J. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The expectation value of the complex phase factor of the fermion determinant is computed in the microscopic domain of QCD at nonzero chemical potential. We find that the average phase factor is non-vanishing below a critical value of the chemical potential equal to the half the pion mass and vanishes exponentially in the volume for larger values of the chemical potential. This holds for QCD with dynamical quarks as well as for quenched and phase quenched QCD. The average phase factor has an essential singularity for zero chemical potential and cannot be obtained by analytic continuation from imaginary chemical potential or by means of a Taylor expansion. The leading order correction in the $p$-expansion of the chiral Lagrangian is calculated as well.
description: 22 pages, 4 figures
Simulating an arbitrary number of flavors of dynamical overlap fermions
Creators: name: DeGrand, Thomas
name: Schaefer, Stefan
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present a set of related Hybrid Monte Carlo methods to simulate an arbitrary number of dynamical overlap fermions. Each fermion is represented by a chiral pseudo-fermion field. The new algorithm reduces critical slowing down in the chiral limit and for sectors of nontrivial topology.
description: 16 pages, 7 figures. Version to be published in JHEP: added some clarifying text, corrected description of reweighting
Women who have been battered : their experiences of the criminal justice system
Creators: name: Rivkin, Shelley Claire
Publisher: name: University of British Columbia
Year: 2008

description: In 1985, policy initiatives were introduced to support women who have been battered and to impose sanctions on batterers. With this greater emphasis on criminal justice remedies, social workers have an important role in assisting women through the justice system. They need to know, from the women themselves, what their experiences are with the justice system and to have them articulate in their own words the factors that motivated or enhanced their decision to proceed. Eight qualitative interviews were conducted with women whose partners were charged and convicted of assault using an open ended interview format. This exploratory study examines their changed perception of the violence, their experiences with the criminal justice system, and their perceptions of the factors that enabled them to proceed and persist with the process. The findings were organized into four categories: heightened awareness of risk, criminalizing the violence, interaction with the criminal justice system, and surviving the process. Emerging from these four categories were three themes that appeared to link the categories: the violence must be stopped, the importance of a personal connection, and pride in taking a stand.
Το ποινικό δεδικασμένο και η αντιμετώπισή του από τα ένδικα μέσα της έφεσης και της αναίρεσης
Creators: name: Κοσκινάρη, Παρασκευή Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: ποινικό δεδικασμένο
ένδικα μέσα
αναίρεση
res judicata
remedies
appeal

description: Η παρούσα εργασία πραγματεύεται το θεσμό του ποινικού δεδικασμένου, τη νομική του φύση και τις συνέπειες που απορρέουν από αυτό. Η εργασία εξετάζει επίσης τις διακρίσεις του δεδικασμένου και τους σκοπούς που εξυπηρετούν. Πραγματοποιείται εκτενής αναφορά ως προς τις προϋποθέσεις που απαιτούνται, ώστε να παραχθεί η αρχή του δεδικασμένου. Επιπρόσθετα, εξετάζεται η ισχύς των αλλοδαπών αμετάκλητων δικαστικών αποφάσεων στον ελληνικό χώρο, καθώς σε ποιες περιπτώσεις κάμπτεται το δεδικασμένο. Περαιτέρω, παρουσιάζονται οι ομοιότητες και διαφορές μεταξύ της ερευνώμενης αρχής και της εκκρεμοδικίας. Στο δεύτερο μέρος της εργασίας, ερευνάται η αντιμετώπιση της εν λόγω αρχής από τα ένδικα μέσα.
description: The main subject issue in this dissertation is the institution of Res Judicata, its legal nature and the consequences, which arising from this principle. The study also deals with the discriminations of the “ne bis in idem” and their purposes. An extensive reference is carried out, relating to the existence of those conditions required so as to be created this principle. In addition, the validity of foreign final judgments in our country is analyzed, and under which conditions the principle “ne bis in idem” is withdrawn. The similarities and differences between this principle in question and lis pendens are examined further. The treatment of res judicata by remedies is investigated, in the second part of this study.
Optimal, reliable estimation of quantum states
Creators: name: Blume-Kohout, Robin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Accurately inferring the state of a quantum device from the results of measurements is a crucial task in building quantum information processing hardware. The predominant state estimation procedure, maximum likelihood estimation (MLE), generally reports an estimate with zero eigenvalues. These cannot be justified. Furthermore, the MLE estimate is incompatible with error bars, so conclusions drawn from it are suspect. I propose an alternative procedure, Bayesian mean estimation (BME). BME never yields zero eigenvalues, its eigenvalues provide a bound on their own uncertainties, and it is the most accurate procedure possible. I show how to implement BME numerically, and how to obtain natural error bars that are compatible with the estimate. Finally, I briefly discuss the differences between Bayesian and frequentist estimation techniques.
description: RevTeX; 14 pages, 2 embedded figures. Comments enthusiastically welcomed!
Επισκόπηση του ασφαλιστικού μέτρου της συντηρητικής κατάσχεσης με έμφαση στη συντηρητική κατάσχεση ακινήτων
Creators: name: Καδόγλου, Χρυσάνθη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: συντηρητική κατάσχεση ακινήτων
αναγκαστική κατάσχεση
δικαστική μεσεγγύηση
conservative attachment of real estate
compulsory seizure
judicial sequestration

description: Η παρούσα μελέτη στοχεύει σε μία επισκόπηση του ασφαλιστικού μέτρου της συντηρητικής κατάσχεσης, με έμφαση στη διαδικασία που ακολουθείται για την επιβολή συντηρητικής κατάσχεσης επί ακινήτων κατ’ άρθρο 714 ΚΠολΔ, στις συνέπειες αυτής, καθώς και σε ανακυπτόμενα, στα πλαίσια αυτής, επιμέρους ειδικά ζητήματα και δη: α) της νομικής δέσμευσης της περιουσίας του καθ’ ου με έκδοση προσωρινής διαταγής, β) της συντηρητικής κατάσχεσης ακινήτου, που τελεί υπό δικαστική μεσεγγύηση, γ) της κατάσχεσης ήδη συντηρητικώς κατασχεθέντος ακινήτου, δ) της εξέλιξης της επιβληθείσας συντηρητικής κατάσχεσης σε αναγκαστική, ε) της αναγκαστικής εκτέλεσης στα πλαίσια συντηρητικής κατάσχεσης και στ) της συντηρητικής κατάσχεσης ακινήτου δυνάμει διαταγής πληρωμής.
description: The present thesis aims at an overview of the interim measure of conservative attachment (arrest), with emphasis given on the procedure followed, according to the article 714 CCP, for the imposition of conservative attachment on real estate, on its consequences and on specific issues that come up because of the imposition of this measure on real estate. Such specific issues are: a) the legal commitment of the defendant’s real estate under a preliminary injunction, b) the conservative attachment of real estate that is already under judicial sequestration, c) the compulsory seizure of real estate that is already conservatively attached, d) the evolution of the imposed measure of conservative attachment to compulsory seizure, e) the procedure of mandatory execution in context of conservative attachment and f) the conservative attachment of real estate under a payment order.
Collective coherence in planar semiconductor microcavities
Creators: name: Keeling, J.
name: Marchetti, F. M.
name: Szymanska, M. H.
name: Littlewood, P. B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Semiconductor microcavities, in which strong coupling of excitons to confined photon modes leads to the formation of exciton-polariton modes, have increasingly become a focus for the study of spontaneous coherence, lasing, and condensation in solid state systems. This review discusses the significant experimental progress to date, the phenomena associated with coherence which have been observed, and also discusses in some detail the different theoretical models that have been used to study such systems. We consider both the case of non-resonant pumping, in which coherence may spontaneously arise, and the related topics of resonant pumping, and the optical parametric oscillator.
description: 46 pages, 12 figures
A modified approach to the measurement problem: Objective reduction in the retinal molecule prior to conformational change
Creators: name: Thaheld, Fred H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: A new analysis of the measurement problem reveals the possibility that collapse of the wavefunction may now take place just before photoisomerization of the rhodopsin molecule in the retinal rods. It is known that when a photon is initially absorbed by the retinal molecule which, along with opsin comprises the rhodopsin molecule, an electron in the highest pi orbital is immediately excited to a pi* orbital. This means that a measurement or transfer of information takes place at the quantum level before the retinal molecule commences the conformational change from cis to trans. This could have profound implications for resolving some of the foundational issues confronting quantum mechanics.
description: 8 pages. A new theory is advanced where the collapse of the wave function now takes place within the retinal molecule, specifically the retinal chromophore. This occurs prior to any retinal molecule conformational change and before any CSL-type reduction mechanism in the retinal rod cells
Radio frequency spectroscopy of a strongly imbalanced Feshbach-resonant Fermi gas
Creators: name: Veillette, Martin
name: Moon, Eun Gook
name: Lamacraft, Austen
name: Radzihovsky, Leo
name: Sachdev, Subir
name: Sheehy, D. E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A sufficiently large species imbalance (polarization) in a two-component Feshbach resonant Fermi gas is known to drive the system into its normal state. We show that the resulting strongly-interacting state is a conventional Fermi liquid, that is, however, strongly renormalized by pairing fluctuations. Using a controlled 1/N expansion, we calculate the properties of this state with a particular emphasis on the atomic spectral function, the momentum distribution functions displaying the Migdal discontinuity, and the radio frequency (RF) spectrum. We discuss the latter in the light of the recent experiments of Schunck et al. (cond-mat/0702066) on such a resonant Fermi gas, and show that the observations are consistent with a conventional, but strongly renormalized Fermi-liquid picture.
description: 10 pages, 5 figures; (v2) Numerous minor updates
The Formation of the Double Pulsar PSR J0737-3039A/B
Creators: name: Stairs, I. H.
name: Thorsett, S. E.
name: Dewey, R. J.
name: Kramer, M.
name: McPhee, C. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent timing observations of the double pulsar J0737-3039A/B have shown that its transverse velocity is extremely low, only 10 km/s, and nearly in the Plane of the Galaxy. With this new information, we rigorously re-examine the history and formation of this system, determining estimates of the pre-supernova companion mass, supernova kick and misalignment angle between the pre- and post-supernova orbital planes. We find that the progenitor to the recently formed `B' pulsar was probably less than 2 MSun, lending credence to suggestions that this object may not have formed in a normal supernova involving the collapse of an iron core. At the same time, the supernova kick was likely non-zero. A comparison to the history of the double-neutron-star binary B1534+12 suggests a range of possible parameters for the progenitors of these systems, which should be taken into account in future binary population syntheses and in predictions of the rate and spatial distribution of short gamma-ray burst events.
description: To appear in MNRAS Letters. Title typo fix only; no change to paper
The Limits of Extended Quintessence
Creators: name: Nesseris, S.
name: Perivolaropoulos, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We use a low redshift expansion of the cosmological equations of extended (scalar-tensor) quintessence to divide the observable Hubble history parameter space in four sectors: A forbidden sector I where the scalar field of the theory becomes imaginary (the kinetic term becomes negative), a forbidden sector II where the scalar field rolls up (instead of down) its potential, an allowed `freezing' quintessence sector III where the scalar field is currently decelerating down its potential towards freezing and an allowed `thawing' sector IV where the scalar field is currently accelerating down its potential. The dividing lines between the sectors depend sensitively on the time derivatives of the Newton's constant G over powers of the Hubble parameter. For minimally coupled quintessence which appears as a special case for a constant G our results are consistent with previous studies. Observable parameter χ^2 contours based on current data (SNLS dataset) are also constructed on top of the sectors, for a prior of Ω_m=0.24. By demanding that the observed 2σχ^2 parameter contours do not lie entirely in the forbidden sectors we derive stringent constraints on the current second time derivative of Newton's constant G. In particular we find {\ddot G}/G >-1.91 H_0^2=-2 10^{-20}h^2 yrs^{-2} at the 2σlevel which is complementary to solar system tests which constrain only the first derivative of G as |{\dot G}/G|<10^{-14}yrs^{-1} at 1σ.
description: 9 pages (revtex), 5 figures. Accepted in Phys. Rev. D (to appear). The mathematica files of the analysis of the paper may be found at http://leandros.physics.uoi.gr/exqlim/exqlim.htm
Genocchi Numbers and f-Vectors of Simplicial Balls
Creators: name: Herrmann, Sven
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 52B05, 11B83

description: The Genocchi numbers are the coefficients of the generating function 2t/(e^t+1). In this note we will give an equation for simplicial balls which involves this numbers. It relates the number of faces in the interior of the ball with the number of faces in the boundary of the ball. This is a variation of similar equations given in [McMullen 2004] and [Herrmann and Joswig 2006].
description: revised version, to appear in European Journal of Combinatorics; minor changes
Additional file 4 of Genomic architecture of endogenous ichnoviruses reveals distinct evolutionary pathways leading to virus domestication in parasitic wasps
Creators: name: Legeai, Fabrice
name: Santos, Bernardo F.
name: Robin, Stéphanie
name: Bretaudeau, Anthony
name: Dikow, Rebecca B.
name: Lemaitre, Claire
name: Jouan, Véronique
name: Ravallec, Marc
name: Drezen, Jean-Michel
name: Tagu, Denis
name: Baudat, Frédéric
name: Gyapay, Gabor
name: Zhou, Xin
name: Liu, Shanlin
name: Webb, Bruce A.
name: Brady, Seán G.
name: Volkoff, Anne-Nathalie
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 4: Table S6. List of scaffolds in Hyposoter didymator and Campoletis sonorensis genomes containing at least on ichnovirus sequence. Are indicated the scaffold name and length, the name of the proviral segment or of the Ichnovirus structural protein encoding region (IVSPER) found in the scaffold, its length and position in the scaffold, the name of the direct repeats flanking the segment or within the segment, and the name of the genes predicted in each viral locus. DRJ, direct repeat junction; R, right; L, left; int, internal.
Ασφάλιση ζωής
Creators: name: Καρέτσος, Βασίλειος Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Ασφάλιση
Ζωή
Επένδυση
Insurance
Life
Investment

description: Σκοπός της διατριβής ήταν η μελέτη της ασφάλισης ζωής, η οποία αποτελεί την σημαντικότερη μορφή ασφάλισης προσωπικών κινδύνων. Αρχικά εξετάσαμε την έννοια της ασφάλισης ποσού, καθώς η ασφάλιση ζωής είναι καθαρά ασφάλιση ποσού. Στη συνέχεια παρουσιάσαμε τα ιδιαίτερα χαρακτηριστικά, τις διακρίσεις και τη λειτουργία της ασφάλισης ζωής. Ακόμη αναφερθήκαμε στο Εγγυητικό Κεφάλαιο Ιδιωτικής Ασφάλισης Ζωής και τον σημαντικό του ρόλο του σε περίπτωση που ασφαλιστική επιχείρηση κλάδου ζωής κηρύσσεται σε κατάσταση πτώχευσης ή ανακαλείται η άδεια λειτουργίας της για παράβαση νόμου. Εξετάσαμε επίσης τις ασφαλίσεις ζωής που συνδέονται με επενδύσεις (unit linked) και τις ειδικές ρυθμίσεις που ισχύουν γι’ αυτές, καθώς και τα ομαδικά συνταξιοδοτικά προγράμματα, τα οποία αποτελούν εργασία επενδυτικής φύσεως. Επιπλέον, ασχοληθήκαμε με ζητήματα της ομαδικής ασφάλισης. Τέλος αναλύσαμε την Οδηγία 2009/138/ΕΚ του Ευρωπαϊκού Κοινοβουλίου και του Συμβουλίου, της 25ης Νοεμβρίου 2009, σχετικά με την ανάληψη και την άσκηση δραστηριοτήτων ασφάλισης και αντασφάλισης (Φερεγγυότητα II), η οποία αποτελεί το νέο πλαίσιο λειτουργίας που θα διέπει τις ασφαλιστικές και αντασφαλιστικές επιχειρήσεις που δραστηριοποιούνται στην Ευρωπαϊκή Ένωση.
description: The aim of the present thesis was the study of life insurance, which is the most important form of personal risk insurance. Initially we examined the concept of amount insurance, as life insurance is clearly amount insurance. Then, we presented the particular features, the distinctions and the function of life insurance. Furthermore, we mentioned the Private Life Insurance Guarantee Fund and its important role in the event of bankruptcy or license revocation due to violation of law of a life insurance company. We also examined life insurances linked to investments (unit linked) and the specific settings applicable to them, as well as the group pension programs, which are tasks with investment character. In addition, we dealt with group insurance issues. Finally, we analyzed Directive 2009/138/EC of the European Parliament and of the Council of 25 November 2009 on the taking-up and pursuit of the business of Insurance and Reinsurance (Solvency II), which is the new operational framework governing insurance and reinsurance companies which are active in the European Union.
Additional file 1 of Ddx56 maintains proliferation of mouse embryonic stem cells via ribosome assembly and interaction with the Oct4/Sox2 complex
Creators: name: Wang, Jingwen
name: Liu, Jiahui
name: Ye, Miaoman
name: Liu, Feng
name: Wu, Su
name: Huang, Junjiu
name: Shi, Guang
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1 : Table S1. Information of PCR and qRT-PCR primers.
Kerr-Taub-NUT Spacetime with Maxwell and Dilaton Fields
Creators: name: Aliev, Alikram N.
name: Cebeci, Hakan
name: Dereli, Tekin
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present an exact solution describing a stationary and axisymmetric object with electromagnetic and dilaton fields. The solution generalizes the usual Kerr-Taub-NUT (Newman-Unti-Tamburino) spacetime in general relativity and is obtained by boosting this spacetime in the fifth dimension and performing a Kaluza-Klein reduction to four dimensions. We also discuss the physical parameters of this solution and calculate its gyromagnetic ratio.
description: 13 pages, REVTeX
Αναπαραστάσεις του φύλου σε μόνιμες εκθέσεις αρχαιολογικών μουσείων: τα παραδείγματα του Αρχαιολογικού Μουσείου Θεσσαλονίκης και του Αρχαιολογικού Μουσείου Πέλλας
Creators: name: Καρλιάμπας, Ιωάννης Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: αρχαιολογία-αναπαραστάσεις φύλου
μουσειολογία
gender representatives-
archaeology
museology

description: Στην παρούσα εργασία γίνεται μια απόπειρα να καταδειχθεί ο τρόπος με τον οποίο η σύγχρονη μουσειολογική πρακτική στα ελληνικά δημόσια μουσεία εντάσσεται στην επιστημονική παράδοση της αρχαιολογίας, διαλέγεται με τα τρέχοντα θεωρητικά ρεύματα και επηρεάζεται (ή επηρεάζει τις) από τις κυρίαρχες πολιτικές αντιλήψεις. Η διερεύνηση των παραπάνω σχέσεων γίνεται μέσα από τη συζήτηση για τις αναπαραστάσεις του φύλου σε μόνιμες εκθέσεις αρχαιολογικών μουσείων με μελέτες περίπτωσης την έκθεση Στη Μακεδονία από τον 7ο αι. π.Χ. ως την ύστερη αρχαιότητα του Αρχαιολογικού Μουσείου Θεσσαλονίκης (ΑΜΘ) και τη μόνιμη έκθεση του Αρχαιολογικού Μουσείου Πέλλας (ΑΜΠ) που είναι αφιερωμένη αποκλειστικά στην Πέλλα, πρωτεύουσα του Μακεδονικού βασιλείου. Αρχικά παρουσιάζεται το πλαίσιο μέσα στο οποίο συγκροτήθηκε η αρχαιολογία ως επιστήμη διεθνώς και στην Ελλάδα, η ανάπτυξη των αρχαιολογικών μουσείων και ο ρόλος τους στην παραγωγή αρχαιολογικού έργου. Η αναδρομή στην ιστορία της αρχαιολογικής επιστήμης γίνεται για να καταστεί σαφές το πώς διαμορφώθηκε διαχρονικά η ελληνική αρχαιολογία, ώστε να γίνει κατανοητή και η ιδιαίτερη προσέγγισή της σε διάφορα ζητήματα. Στη συνέχεια περιγράφεται το πλαίσιο μέσα στο οποίο γίνεται η συζήτηση σχετικά με το φύλο στην αρχαιολογία με αναφορά στις πρόσφατες θεωρήσεις, αλλά και στην ιστορική τους διαμόρφωση. Ακολουθεί η επισταμένη παρουσίαση των δύο μελετών περίπτωσης και κλείνοντας γίνεται αποτίμηση των παρατηρήσεων μας πάνω στις δύο εκθέσεις.
description: The aim of the present dissertation is the description of the relation between the museological practice in the Greek archaeological museums and the theoretical tradition of Greek archaeology. The discussion of this issue is holding through the representations of gender in the permanent exhibitions of two archaeological museums, the archaeological museum of Thessaloniki and the archaeological museum of Pella. In the first part we present aspects of the history of archaeology and the history of museums, a brief history of the feminist movements and a short consideration of the archaeological representations. In the second part we examine in detail the representations of women in the archaeological museum of Thessaloniki and the archaeological museum of Pella. In the third part we present the conclusions based on our observations on the two different archaeological exhibitions.
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
The O(n) model on the annulus
Creators: name: Cardy, John
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We use Coulomb gas methods to propose an explicit form for the scaling limit of the partition function of the critical O(n) model on an annulus, with free boundary conditions, as a function of its modulus. This correctly takes into account the magnetic charge asymmetry and the decoupling of the null states. It agrees with an earlier conjecture based on Bethe ansatz and quantum group symmetry, and with all known results for special values of n. It gives new formulae for percolation (the probability that a cluster connects the two opposite boundaries) and for self-avoiding loops (the partition function for a single loop wrapping non-trivially around the annulus.) The limit n->0 also gives explicit examples of partition functions in logarithmic conformal field theory.
description: 20 pp. v.2: important references added to earlier work, minor typos corrected
Développement et mise à l’échelle des technologies de traitement et de réutilisation des eaux usées dans les pays d’Afrique méditerranéenne: le projet MADFORWATER
Creators: name: Lamaddalena, Roberta
name: Frascari, Dario
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2020
Subjects: ING-IND/25 Impianti chimici

description: L'objectif de MADFORWATER était de développer un ensemble de solutions technologiques et de gestion intégrées pour améliorer le traitement des eaux usées, leur réutilisation dans l’irrigation et l'efficacité de l'eau dans le secteur de l'agriculture en Tunisie, au Maroc et en Égypte. MADFORWATER a développé des technologies pour la production d'eau d’une qualité qui convient à l'irrigation à partir des canaux de drainage, des eaux usées municipales, agro-industrielles et industrielles et des technologies pour promouvoir l'efficacité et la réutilisation de l'eau dans le secteur de l’agriculture, initialement validées à l'échelle du laboratoire, et les a adaptées à trois bassins hydrologiques principaux dans les pays africains méditerranéens sélectionnées. Les technologies sélectionnées ont été adaptées et validées dans quatre installations/unités pilotes sur le terrain de traitement / réutilisation intégrés des eaux usées. Des stratégies intégrées de traitement et de réutilisation des eaux usées ciblées sur les bassins sélectionnés ont été élaborées, et des lignes directrices pour l'élaboration de stratégies de gestion intégrée de l'eau dans d'autres bassins des trois pays africains méditerranéens cibles ont été décrites, en tenant compte du changement climatique, de l'augmentation de la population et des scénarios de croissance économique. La pertinence sociale et technique des technologies développées et des instruments non technologiques par rapport au contexte local a été évaluée avec la participation des parties prenantes et des partenaires des pays africains méditerranéens. Des lignes directrices relatives aux instruments économiques et aux politiques pour une mise en œuvre efficace des solutions de gestion de l'eau proposées dans les pays africains méditerranéens cibles ont été élaborées. Le consortium MADFORWATER est composé de 17 partenaires, dont 5 d'Afrique du Nord et 1 de Chine.
Tests of general relativity from timing the double pulsar
Creators: name: Kramer, M.
name: Stairs, I. H.
name: Manchester, R. N.
name: McLaughlin, M. A.
name: Lyne, A. G.
name: Ferdman, R. D.
name: Burgay, M.
name: Lorimer, D. R.
name: Possenti, A.
name: D'Amico, N.
name: Sarkissian, J. M.
name: Hobbs, G. B.
name: Reynolds, J. E.
name: Freire, P. C. C.
name: Camilo, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The double pulsar system, PSR J0737-3039A/B, is unique in that both neutron stars are detectable as radio pulsars. This, combined with significantly higher mean orbital velocities and accelerations when compared to other binary pulsars, suggested that the system would become the best available testbed for general relativity and alternative theories of gravity in the strong-field regime. Here we report on precision timing observations taken over the 2.5 years since its discovery and present four independent strong-field tests of general relativity. Use of the theory-independent mass ratio of the two stars makes these tests uniquely different from earlier studies. By measuring relativistic corrections to the Keplerian description of the orbital motion, we find that the ``post-Keplerian'' parameter s agrees with the value predicted by Einstein's theory of general relativity within an uncertainty of 0.05%, the most precise test yet obtained. We also show that the transverse velocity of the system's center of mass is extremely small. Combined with the system's location near the Sun, this result suggests that future tests of gravitational theories with the double pulsar will supersede the best current Solar-system tests. It also implies that the second-born pulsar may have formed differently to the usually assumed core-collapse of a helium star.
description: Appeared in Science Express, Sept. 14, 2006. Includes supporting material
Exactly marginal deformations of quiver gauge theories as seen from brane tilings
Creators: name: Imamura, Yosuke
name: Isono, Hiroshi
name: Kimura, Keisuke
name: Yamazaki, Masahito
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the relation between exactly marginal deformations in a large class of N=1 superconformal quiver gauge theories described by brane tilings and the degrees of freedom in the corresponding 5-brane systems. We show, with the help of NSVZ exact beta functions, that there are generically d-1 complex exactly marginal deformations of a gauge theory, where d is the perimeter of the corresponding n it, and the other two, the diagonal gauge coupling and a beta-like deformation, as background supergravity fields.toric diagram. We identify d-3 complex marginal deformations as deformations of the brane system and the Wilson lines on it, and the other two, the diagonal gauge coupling and a beta-like deformation, as background supergravity fields.
description: 33 pages, 9 figures, replaced with published version
Quantum heat engine with continuum working medium
Creators: name: Li, S.
name: Wang, H.
name: Sun, Y. D.
name: Yi, X. X.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce a new quantum heat engine, in which the working medium is a quantum system with a discrete level and a continuum. Net work done by this engine is calculated and discussed. The results show that this quantum heat engine behaves like the two-level quantum heat engine in both the high-temperature and the low-temperature limits, but it operates differently in temperatures between them. The efficiency of this quantum heat engine is also presented and discussed.
description: 5 pages, 3 figures
Μελέτη συντήρησης και διαχείρισης των κειμηλίων της Ιεράς Μονής του Αγίου Γεωργίου Περιστερεώτα
Creators: name: Βασιλειάδου, Φαίδρα Μιχαήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: συντήρηση
διαχείριση
Ιερά Μονή Αγίου Γεωργίου Περιστερεώτα
conservation
management
Holy Monastery of St. George Peristereota

description: Η παρούσα μελέτη γίνεται στα πλαίσια του Διαπανεπιστημιακού Προγράμματος Μεταπτυχιακών Σπουδών Μουσειολογίας - Διαχείρισης Πολιτισμού και ανατέθηκε με σκοπό εκπόνησης διπλωματικής εργασίας. Το θέμα της εργασίας, «Μελέτη συντήρησης και διαχείρισης των κειμηλίων της Ιεράς Μονής του Αγίου Γεωργίου Περιστερεώτα», αφορά το σύνολο των εργασιών που έγιναν με σκοπό την καταγραφή και τεκμηρίωση ενός δείγματος του συνόλου των κειμηλίων, καθώς και την προληπτική συντήρηση. Στο θεωρητικό μέρος της εργασίας γίνεται αναφορά των υποχρεώσεων του συντηρητή απέναντι σε αντικείμενα που φέρουν την σημασία του ιερού, όπως τα συγκεκριμένα. Υπογραμμίζεται επίσης η σημαντικότητα της τεκμηριώσης των αντικειμένων στην συντήρηση και επιχειρείται μία παρουσίαση των ηλεκτρονικών συστημάτων τεκμηρίωσης. Το πειραματικό κομμάτι επικεντρώνεται στις ανάγκες του συνόλου των αντικειμένων και γίνονται προτάσεις προληπτικής συντήρησης. Τέλος, ακολουθούν τα δελτία συντήρησης που σχεδιάστηκαν για συγκεκριμένους σκοπούς.
description: Conservation is the methodological moment of recognition of the work of art in its natural composition and its double polarity, aesthetic and historical view, transferring into the future. Furthermore, the object of conservation is a presumption of history, analysing various aspects of its value. A unique and delicate category in the conservation sector is the maintenance and management of sacred objects. As sacred means objects and utensils that used to served worship and ritual services within each religion. The sacred objects are world famous discoveries for their symbolism. At the same time, they are treated as great works of art, their special style of manufacture, and also they represent historical and ethnological values. For those reasons, the conservator must manage these objects with great respect, delicacy and always handle them with care. This study took place as a dissertation in the MA Program, Museology and Cultural Management in the School of Architecture of the Aristotle University of Thessaloniki. The objective of the present work is the documentation of conservation work on objects that belong to the Holy Monastery of St. George Peristereota and also a proposal of preventive conservation. More concretely, the essay aims to use the methods of preventive conservation (storage, environmental conditions, safety system, cataloguing etc.) in objects that carry sacred and sentimental value. It also includes, all the ethics and standards that the conservator itself is obliged to follow in matters and situations with such delicacy.
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
Recent developments in chiral dynamics of hadrons and hadrons in nuclei
Creators: name: Oset, E.
name: Doring, M.
name: Kaskulov, M.
name: Roca, L.
name: Sarkar, S.
name: Strottman, D.
name: Vacas, M. J. Vicente
name: Magas, V. K.
name: Ramos, A.
name: Hernandez, E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this talk I present recent developments in the field of hadronic physics and hadrons in the nuclear medium. I review the unitary chiral approach to meson baryon interaction and address the topics of the two dynamically generated $Λ(1405)$ resonances, with experiments testing it, the $Λ(1520)$ and $Δ(1700)$ resonances, plus the $Λ(1520)$, $Σ(1385)$ and $ω$ in the nuclear medium.
description: 9 pages, 8 figures, Talk at YKIS06 Kyoto Symposium, Kyoto, december 2006
Occam's razor meets WMAP
Creators: name: Magueijo, Joao
name: Sorkin, Rafael D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using a variety of quantitative implementations of Occam's razor we examine the low quadrupole, the ``axis of evil'' effect and other detections recently made appealing to the excellent WMAP data. We find that some razors {\it fully} demolish the much lauded claims for departures from scale-invariance. They all reduce to pathetic levels the evidence for a low quadrupole (or any other low $\ell$ cut-off), both in the first and third year WMAP releases. The ``axis of evil'' effect is the only anomaly examined here that survives the humiliations of Occam's razor, and even then in the category of ``strong'' rather than ``decisive'' evidence. Statistical considerations aside, differences between the various renditions of the datasets remain worrying.
Deep optical spectroscopy of extended Lyman alpha emission around three radio-quiet z=4.5 quasars
Creators: name: Courbin, F.
name: North, P.
name: Eigenbrod, A.
name: Chelouche, D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the first results of a spectroscopic search for Lyman alpha, envelopes around three z=4.5 radio-quiet quasars. Our observational strategy uses the FORS2 spectrograph attached to the UT1 of the Very Large Telescope (VLT) in the multi-slit mode. This allows us to observe simultaneously the quasars and several PSF stars. The spectra of the latter are used to remove the point-like quasar from the data, and to unveil the faint underlying Lyman alpha, envelopes associated with the quasars with unprecedented depth. We clearly detect an envelope around two of the three quasars. These envelopes measure respectively 10" and 13" in extent (i.e. 67 kpc and 87 kpc). This is 5 to 10 times larger than predicted by the models of Haiman & Rees (2001) and up to 100 times fainter. Our observations better agree with models involing a clumpy envelope as in Alam & Miralda-Escude (2002) or Chelouche et al. (2008). We find that the brighter quasars also have the brighter envelopes but that the extend of the envelopes does not depend on the quasar luminosity. Although our results are based on only two objects with a detected Lyman alpha, envelope, the quality of the spatial deblending of the spectra lends considerable hope to estimate the luminosity function and surface brightness profiles of high redshift Lyman alpha, envelopes down to F= 2-3 10^{-21} erg/s/cm^2/A. We find that the best strategy to carry out such a project is to obtain both narrow-band images and deep slit-spectra.
description: 8 pages, 5 figures, submitted to A&A
Minimal realization of the Orbital Kondo effect in a Quantum Dot with two Leads
Creators: name: Silvestrov, P. G.
name: Imry, Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate theoretically how the Kondo effect may be observed in the transport of spinless electrons through a quantum dot. The role of conduction electron spin is played by a lead index. The Kondo effect takes place if there are two close levels in the dot populated by a single electron. For temperatures exceeding the Kondo temperature $T\gg T_K$ the conductance is maximal if the levels are exactly degenerate. However, at zero temperature the conductance is zero at the SU(2) symmetric point, but reaches the unitary limit $G = e^2/h$ for some finite value of the level splitting $Δ\eps\sim T_K$. Introducing the spin-1/2 for electrons and having two degenerate orbital levels in the dot allows to observe the SU(4) Kondo effect in a single dot coupled to two leads.
description: 6 pages, 2 figures
Pathwise inequalities for local time: Applications to Skorokhod embeddings and optimal stopping
Creators: name: Cox, A. M. G.
name: Hobson, David
name: Obłój, Jan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: Pricing of Securities (q-fin.PR)
subject: FOS: Mathematics
subject: FOS: Economics and business
subject: 60G40 (Primary) 60G44, 91B28 (Secondary)

description: We develop a class of pathwise inequalities of the form $H(B_t)\ge M_t+F(L_t)$, where $B_t$ is Brownian motion, $L_t$ its local time at zero and $M_t$ a local martingale. The concrete nature of the representation makes the inequality useful for a variety of applications. In this work, we use the inequalities to derive constructions and optimality results of Vallois' Skorokhod embeddings. We discuss their financial interpretation in the context of robust pricing and hedging of options written on the local time. In the final part of the paper we use the inequalities to solve a class of optimal stopping problems of the form $\sup_τ\mathbb{E}[F(L_τ)-\int _0^τβ(B_s) ds]$. The solution is given via a minimal solution to a system of differential equations and thus resembles the maximality principle described by Peskir. Throughout, the emphasis is placed on the novelty and simplicity of the techniques.
description: Published in at http://dx.doi.org/10.1214/07-AAP507 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
On the maximum amplitude and coherence of the kilohertz quasi-periodic oscillations in low-mass X-ray binaries
Creators: name: Mendez, Mariano
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I study the behaviour of the maximum rms fractional amplitude, $r_{\rm max}$ and the maximum coherence, $Q_{\rm max}$, of the kilohertz quasi-periodic oscillations (kHz QPOs) in a dozen low-mass X-ray binaries. I find that: (i) The maximum rms amplitudes of the lower and the upper kHz QPO, $r^{\ell}_{\rm max}$ and $r^{\rm u}_{\rm max}$, respectively, decrease more or less exponentially with increasing luminosity of the source; (ii) the maximum coherence of the lower kHz QPO, $Q^{\ell}_{\rm max}$, first increases and then decreases exponentially with luminosity, at a faster rate than both $r^{\ell}_{\rm max}$ and $r^{\rm u}_{\rm max}$; (iii) the maximum coherence of the upper kHz QPO, $Q^{\rm u}_{\rm max}$, is more or less independent of luminosity; and (iv) $r_{\rm max}$ and $Q_{\rm max}$ show the opposite behaviour with hardness of the source, consistent with the fact that there is a general anticorrelation between luminosity and spectral hardness in these sources. Both $r_{\rm max}$ and $Q_{\rm max}$ in the sample of sources, and the rms amplitude and coherence of the kHz QPOs in individual sources show a similar behaviour with hardness. This similarity argues against the interpretation that the drop of coherence and rms amplitude of the lower kHz QPO at high QPO frequencies in individual sources is a signature of the innermost stable circular orbit around a neutron star. I discuss possible interpretations of these results in terms of the modulation mechanisms that may be responsible for the observed variability.
description: Accepted for publication in MNRAS. 16 pages + 10 figures. Uses mn2e.cls
Swift and XMM-Newton Observations of the Extraordinary GRB 060729: An afterglow with a more than 100 days X-ray light curve
Creators: name: Grupe, Dirk
name: Gronwall, Caryl
name: Wang, Xiang-Yu
name: Roming, Peter
name: Cummings, Jay
name: Zhang, Bing
name: Meszaros, Peter
name: Chincarini, Guido
name: Osborne, Julian
name: Sakamoto, Takanori
name: Gehrels, Neil
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the results of the Swift and XMM observations of the Swift-discovered long Gamma-Ray Burst GRB 060729 ($T_{90}$=115s). The afterglow of this burst was exceptionally bright in X-rays as well as at UV/Optical wavelengths showing an unusually long slow decay phase ($α$=0.14\plm0.02) suggesting a larger energy injection phase at early times than in other bursts. The X-ray light curve displays a break at about 60 ks after the burst. The X-ray decay slope after the break is $α$=1.29\plm0.03. Up to 125 days after the burst we do not detect a jet break, suggesting that the jet opening angle is larger than 28 degrees. In the first 2 minutes after the burst (rest frame) the X-ray spectrum of the burst changed dramatically from a hard X-ray spectrum to a very soft one. We find that the X-ray spectra at this early phase can all be fitted by an absorbed single power law model or alternatively by a blackbody plus power law model. The power law fits show that the X-ray spectrum becomes steeper while the absorption column density decreases. In Swift's UV/Optical telescope the afterglow was clearly detected up to 9 days after the burst in all 6 filters and even longer in some of the UV filters with the latest detection in the UVW1 31 days after the burst. A break at about 50 ks is clearly detected in all 6 UVOT filters from a shallow decay slope of about 0.3 and a steeper decay slope of 1.3. In addition to the \swift observations we also present and discuss the results from a 61 ks ToO observation by XMM. (Abriviated)
description: Accepted to be published in the Astrophysical Journal, 28 pages, 10 figures
Εδαφικές συνθήκες των αναδασώσεων Pinus maritima Mill στην κεντρική και βορειοανατολική Χαλκιδική 40 χρόνια μετά την εγκατάστασή τους
Creators: name: Καραμανώλη, Αικατερίνη Μιχαήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: αναδασώσεις Pinus maritima
ταχυαυξές κωνοφόρο
εδαφικές συνθήκες
Pinus maritima reforestations
fast growing conifer
soil conditions

description: Σκοπός αυτής της διατριβής ήταν η εκτίμηση των εδαφικών συνθηκών, σε σχέση με την ανάπτυξη των αναδασώσεων παραθαλάσσιας πεύκης (Pinus maritima Mill ή Pinus pinaster Ait) στην κεντρική και βορειοανατολική Χαλκιδική, που πραγματοποιήθηκαν πριν 40-45 έτη, προκειμένου να αναβαθμιστούν υποβαθμισμένα ορεινά θαμνώδη οικοσυστήματα. Πήραμε δείγματα ανόργανου εδάφους και δασικού τάπητα από 12 δειγματοληπτικές επιφάνειες σε δύο περιοχές, τον Πολύγυρο και το Γομάτι. Ακόμη εξετάσαμε τη σημερινή κατάσταση των αναδασώσεων και διαπιστώσαμε ότι η ανάπτυξη της βλάστησης δεν είναι η αναμενόμενη, παρά την ηλικία των δέντρων. Επίσης παρουσιάσαμε την περιεκτικότητα του εδάφους σε οργανική ουσία και θρεπτικά στοιχεία και κάναμε συγκρίσεις μεταξύ διαφορετικών περιοχών. Από την έρευνα διαπιστώθηκε μεγάλη συσσώρευση οργανικής ουσίας και θρεπτικών στοιχείων στο δασικό τάπητα, λόγω κακών συνθηκών αποσύνθεσης και χαμηλές για τις ανάγκες των φυτών ποσότητες φωσφόρου στο έδαφος.
description: The aim of the present thesis was the study of plant growth and soil conditions of maritime pine (P. maritima Mill or Pinus pinaster Ait) reforestations in central and northeast Halkidiki, which were carried out 40-45 years ago, in order to upgrade highland degraded bushy ecosystems. We took samples of mineral soil and forest floor from 12 different sites, in 2 locations (Polygyros and Gomati). Furthermore, we examined the current situation of the plant growth; we noticed, however, that the development of the plantation wasn’t the expected one, according to its age. Then we presented the quantities of organic matter and nutrients on the forest floor and the mineral soil and we also compared different sites. The research confirmed a large accumulation of organic matter and nutrients on the forest floor, because of poor decomposition conditions, whereas the quantities of phosphorus on the soil were identified rather low for the needs of the plants.
The Seyfert 1 Galaxy Mrk 335 at a very low flux state: mapping the soft X-ray photoionised gas
Creators: name: Longinotti, A. L.
name: Nucita, A.
name: Santos-Lleo, M.
name: Guainazzi, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper reports on an XMM-Newton observation of the Seyfert 1 Galaxy Mrk 335 performed as a Target of Opportunity when the source was in an unusually low flux state. The low level of continuum emission unveiled an underlying line-rich soft X-ray spectrum, which can be studied with the Reflection Grating Spectrometer. The emission features have been analysed at high resolution with unprecedented detail for this source. Line ratios diagnostic from H-like and He-like ions indicates that the line emission arises in X-ray photoionised plasma. Extensive simulations have been performed with the CLOUDY photoionisation code. From the comparison of the expected and observed line intensities the physical properties of the line emitting material were derived. Because of the degeneracy in the ionisation parameter, a number of different solutions in terms of electron density and column density of the gas are consistent with the spectral diagnostics. This prevents us from determining uniquely the properties of the plasma; however, the location(s) of the X-ray photoionised gas can be constrained to be within 0.06 pc (outer boundary). This limit places the X-ray line emitting gas at the inner edge of the material where the broad optical lines are produced (Broad Line Region).
description: Accepted on A&A on 07/03/2008, final version after proofs, typos corrected, fig 4 replaced